Modular built-in mounting high-pressure plunger-type pneumohydraulic accumulator

FIELD: engines and pumps.

SUBSTANCE: device is designed to accumulate power in variable liquid power consumption hydraulic drives, to damp pressure pulsations and to kill hydraulic shocks in supply hydraulic systems. The accumulator incorporates a cylindrical barrel casing, its one end being closed by a spherical bottom with a limiting thrust end face surface, a casing neck making a central gas inlet, a detachable cover furnished with an axial channel to feed working fluid and a thrust end face, a separating piston arranged inside the barrel so as to reciprocate and to form a fluid and gas chambers. Here note that the piston includes two sealing sections spaced axially apart and moving along the accumulator inner wall. Note also that the accumulator represents an integral compact unit, a module, that can be built easily and directly into the system hydraulic drive, the said module incorporating a valve unit with shutting off elements of the "valve-seat" type and detachable coupler.

EFFECT: higher reliability and safety, ease of manufacture and repair.

6 cl, 6 dwg

 

The invention relates to the field of engineering, namely, devices for energy storage used in hydraulic variable power consumption of a liquid and a large short-term consumption, as well as to provide additional power to the hydraulic actuator of the working fluid and damping of pressure pulsations.

Known piston hydraulic gas battery, comprising a housing with a liquid and a gas cavity, a separator cavities in the form of a piston (see the book T.M. Basta "Hydraulic actuators aircraft", publishing house "engineering", Moscow, 1967, s.293, RIS b). Piston seal in a known hydraulic gas battery is achieved by using rubber rings. To improve the tightness and lubricate these rings use a liquid gate, created by filling the working fluid annular outer groove of the piston.

Known design hydraulic gas battery after his discharge stores in oral liquid shutter pressure exceeding the pressure of the gas. This liquid is fed in an annular groove on the piston that is located between two rubber o-rings and auxiliary differential piston under spring force and the force of fluid pressure in the chamber of the differential piston.

Pressure is in the camera consequently, in the annular groove of the piston depends on the difference of these forces and will be the maximum excess pressure of gas at zero pressure fluid. This allows lubrication of the sealing rings of the piston, including the ring, situated on the side of the gas chamber, in a discharged state of the battery.

Known design piston hydraulic gas battery differs complexity and adaptability to manufacture because of the need to ensure not only the accuracy of manufacturing, and strict alignment of the interacting parts of the piston and placed in it a spring-loaded differential piston.

To the disadvantage of the known device should still be considered insufficiently reliable method of fastening the removable covers on both sides of the hydraulic gas battery using a flat elastic rings, the formulation of which largely solves the problem of perception is not axial and radial loads.

Known piston hydraulic gas battery, comprising a housing with a socket for the supply of fluid under pressure (see patent DE 10206289 A1, 7 F15 1/24 from 15.02.2002 year). In the case slides a piston separating the liquid and gas chambers. Hydraulic gas battery between the piston and the housing contains two o-ring seals spaced from each other at a distance "a". One of uplot the response is under the pressure of the working fluid and the other under the pressure of the gas environment.

To ensure lubrication of the gas seal, the distance "a" between the seals is less than the stroke of the piston. In addition, between the piston and the housing in the area of the sealing fluid provides lubrication gap "S", through which fluid from the working chamber, the dampening piston is moved o-rings depending on the stroke.

However, a significant disadvantage of the known construction is that captured by the piston grease when working piston hydraulic gas battery "moved out as well with the outer surface of the piston sealing ring mounted in the middle part of the piston, thus excluding the possibility of the admission of lubricant to the o-ring placed on the side of the gas chamber. This drawback reduces the operational reliability of hydraulic gas battery.

Known analogues of the proposed technical solution closest to the technical essence is adopted as the prototype of the piston accumulator (see patent WO 3016723 A2, 7 F15 from 18.07.2002 year). Known hydraulic accumulator contains the maximum number similar to the inventive pneumatic-hydraulic piston accumulator structural characteristics, namely: a housing made in the form of tsilindricheskogo with a hollow spherical bottom with restrictive resistant front surface and a Central inlet for the supply of gas, removable lid with an axial hole for supplying a working fluid and a support end, a dividing piston mounted inside the sleeve with the possibility of reciprocating movement and formation of liquid and gas chambers, and the piston includes two sealing section, spaced apart in the axial direction of the piston and moving along the inner wall of the pneumatic-hydraulic accumulator.

By virtue of the known hydraulic gas battery is that it to implement a supply of liquid lubricant to the sealing elements of the piston on its outer surface formed annular groove-collector, with the possibility of a message with additional centrally located source of nourishment working fluid in the form of auxiliary spring-loaded piston accumulator. In General, the known hydraulic accumulator different structural complexity and consequently excessive complexity.

A common shortcoming of piston accumulators is the presence of friction of the piston in the cylinder, which creates a hysteresis effect. Loss of pressure to overcome the friction forces and inertia forces of the piston be 1.6...of 3.2 kgf/cm2. Because static friction force of the piston, sealed with rubber rings, may exceed four or more times the force of friction of the movement (the long stay alone this excess can reach ten times the value), possible even spasmodic movement of the piston under the effect of gas compressibility and the considerable inertia of the piston can develop into harmonic oscillations of the piston with a high frequency and a large amplitude.

Due to the large accelerations and large masses of the piston inertia forces when such fluctuations can be large, can cause unacceptable pressure fluctuations in the gas chamber of the accumulator and its associated hydraulic line. These fluctuations can cause fatigue failures of parts of the battery, as well as various hydraulic devices of the system (see the book Timbuktu Hydraulic actuators aircraft", publishing house "engineering", Moscow, 1967, s.293).

It should be noted that in the process of charging hydraulic gas accumulator piston type there is an increase in pressure and heating of the compressed gas in the oral environment, with considerable evolution of heat. Conversely, when the battery is discharged and making them useful work is the expansion of the gas in the gas chamber, accompanied by lowering of the temperature and pressure in it. To achieve the most efficient operation of the hydraulic accumulator and increase its efficiency processes occurring in the gas chamber of the accumulator at the time of charging and discharging should be max is maximum close to the isothermal process, in which the relationship between the main parameters of gas is expressed by the law of Boyle-Mariott: pV=RT=const, which implies that at constant temperature gas (T) its volume (V) is inversely proportional to the pressure (p).

Known piston hydroaccumulator adopted as an analogue of the prototype has another disadvantage in that in addition to structural and technological complexity of the separating piston, leading to an increase in its mass and inertial forces in the hydraulic accumulator is missing a number of essential structural elements, which would have intensified the heat from the gas chambers during compression of gas at the time of charging, and, accordingly, conducted heat input from the environment when the expansion of the gas during discharge of the battery, which increases the efficiency of the battery and produce external work due to the approximation of thermodynamic processes in the gas chamber to isothermal.

In the known construction to provide charging piston accumulator with location side of the gas chamber is provided by the axial setting of the charger. The absence of this device, the outer sealing element involves the insertion of this device directly in the spherical part of the body casing guy is reaccumulate. Nereshennosti this type of connection imposes certain additional technological difficulties in the organization of technical inspections, maintenance, repair and control of shut-off valve located inside the input charger.

The increase of the technical level of the hydraulic drive with variable energy consumption of the liquid and large short-term costs, the expansion of their functionality requires in turn create a pneumohydraulic accumulator with qualitatively new characteristics. In addition, they must be compact, have high operational efficiency and to ensure the convenience and safety of operation.

It should be noted that most of the above types of structures pneumohydraulic accumulator, including the design of the analog prototype, have, as a rule, "monofunctional" application, so the most up to date becomes a matter of developing a pneumo-hydraulic accumulator universal application that combines "multi-functional" features and allows to reduce the existing nomenclature of the pneumohydraulic accumulator.

On the existing prior art construction pneumohydraulic is ccumulation, including design of analog prototype does not satisfy the developers of the hydraulic control systems of aircraft and other objects of the application due to a mismatch pneumohydraulic accumulator special requirements.

In particular, requirements for implementation of modern principles of modularization and modularity of the execution of the constituent elements. The observance of these principles, as we know, opens the opportunity to Autonomous development of technical characteristics and testing, allows insertions pneumohydraulic accumulator directly to the hydraulic actuator, and to simplify the work associated with the installation and dismantling in a limited installation space and repair directly on the object.

Together these disadvantages of the known piston accumulators and analog prototype sufficiently reduce performance and limit its use, for example, in aeronautical engineering.

The technical object of the present invention is to provide such design pneumatic-hydraulic piston accumulator, which combines the features and advantages of the known accumulators, but has a more simple, reliable, adaptable and maintainable design with od is vremennym the achievement of other technical and economic indicators:

- implementation of a complete pneumatic-hydraulic accumulator in the form of a single block module with the possibility of easy installation directly on the housing of the hydraulic drive of the aircraft and Autonomous testing of technical characteristics

- ensuring compactness of layout of the inventive pneumatic-hydraulic accumulator to the hydraulic actuator and facilities connected thereto a corresponding pipeline power,

- extension functionality

- improving the strength characteristics of the main elements of power, pneumatic-hydraulic accumulator by giving them a spherical shape,

- improving efficiency and providing constructive increasing range of external work due to the approximation processes in the gas chamber to isothermal,

- minimization of the magnitude of mechanical friction when moving the separating piston, the weight of the piston, the inertial forces and hysteresis phenomena in transient conditions,

implementation the simplest way to supply lubrication to the seal piston installed from the side of the gas chambers,

- the application of more advanced methods for preparations and cheap technological steels for the manufacture of power parts pneumohydraulic accumulator.

The problem is solved in that proposed in the IOM pneumatic-hydraulic piston accumulator module implementation for built-in installation and high pressures (pneumohydraulic accumulator), comprising a housing made in the form of a cylindrical sleeve closed at one end and a spherical bottom with restrictive resistant front surface and a neck - Central inlet channel for supplying a gas, a removable lid with an axial channel for supplying a working fluid and a support end, a dividing piston mounted inside the sleeve with the possibility of reciprocating movement and formation of liquid and gas chambers, and the piston includes two sealing section, spaced apart in the axial direction of the piston and moving along the inner wall of the pneumatic-hydraulic accumulator.

According to the invention a pneumatic accumulator, comprising a housing in the form of a cylindrical sleeve closed at one end and a spherical bottom, a removable lid with a channel for supplying the working fluid and the separating piston is formed as a single unit module with the possibility of hard attach directly to the housing of the hydraulic drive of the aircraft, Autonomous mining technical characteristics and education paths of the gas environment in the same direction, with the Central inlet channel for supplying a gas in the housing is a sleeve made in the form of a threaded bore with the sealing face of the groove in the threaded bore coaxially aligned with what zmoznostjo axial movement, preload and rigid fixation in all directions tightly integrated input charger, which is structurally and functionally formed in the layout independent module, the module contains a valve site with locking elements of type "valve-seat and a removable connector, and the connector is formed in the form of a nozzle with a Central stepped through bore and coaxially formed inner and outer threaded and sealing areas with the possibility of sealed messages to the gas chambers pneumohydraulic accumulator and the internal cavity of the valve block between themselves, with the peripheral surface of the pipe is additionally equipped area with a multifaceted surface, the valve unit is designed with a trajectory passing gas environment in one direction and includes a housing made in the form of a sleeve with outer end threaded and the end sealing sections, between which is formed by double-sided cylindrical ledge and a polyhedron with end support surface to the inside of the sleeve coaxially of the outer installation surface opposite the location of the formed end guides bore - channels of input and output, and between them is formed a partition with a Central inlet at one side of the partition, given the channel, posted by shut-off shut-off body with the possibility of reciprocating movement in the guide bore and simultaneous contact and interaction conical sealing part with the saddle of the output channel of the body, and on the other hand, the mechanism for stepless adjustment efforts preload valve body through the nut, pre-Podiatry cylindrical compression spring relative to the reference end walls and are secured by a spring ring, with shut-off shut-off body is structurally designed in the form of an Assembly unit with assasino interconnected parts - rod with a spherical head and a support end, a threaded section with a recess and the end of the groove and radially directed through hole in the body of the rod seal with truncated cone sealing surface and the axial hole and the base of the guide sleeve with radially located through hole, and the connection node of these parts are made in the form of a cylindrical pin with no consoles sealed in the bearing sleeve ends, while interacting with shut-off shut-off body sealing surface of the seat of the outlet channel of the body is tapered, forming the lateral surface of a truncated cone, is coaxially located relative to the cylindrical guide Rastro is key and turned a smaller base in the direction of arrangement of the input channel, moreover, the corners of a truncated cone seat and shut-off shut-off organ is made with equal values in the range from 28 to 35°in addition, between the walls of the outlet channel and the outer surface of the support sleeve is formed of a guaranteed annular gap for the passage of the gas environment.

According to the invention on the outer surface of corpuscules formed, from the side of the open part is a threaded section with the track surface and the sealing device, and in the middle of the heat exchange elements in the form of advanced peripheral surface with the formation therein of a number of spaced each other at an equal distance in the axial direction of the annular ribs with trapezoidal shape cross-section and made in one piece with the casing-sleeve, with an annular rib equidistant radially from the longitudinal axis of the housing-liners, and the ratio of the height of the trapezoid cross-section of the ribs to the diameter of the mirror casing-liner is selected in accordance with a ratio of

HTr/D3≥0,028,

where NTr- the height of a trapezoid-sectional annular rib, mm;

D3- diameter of mirror housing-liners, mm.

According to the invention the bottom of the removable cover is made in the form of a concave spherical surface, and the cover is rigidly fixed to the body of the sleeve by a threaded connection and the axial preload through with ormirovannogo on its inner surface an annular abutment end surface with additional external locking of one or more set screws evenly spaced around the circumference and are secured by cerite-top into the slot in the thread at two or three points the depth of 1,0...1,5 mm with corner punch 60°and a removable cover provided with means to allow easy installation of a pneumatic-hydraulic accumulator directly on the housing of the hydraulic actuator, and connecting the accumulator to the hydraulic system of the power, while the node mounting attach the battery to the actuator housing is made in the form of the outer profiled grooves and objetos the contour of the groove of the cylindrical shell-yoke, and an axial channel for supplying a working fluid is made in the form of a threaded bore with the sealing face of the groove in which with the possibility of axial movement, preload and rigid fixation in all directions tightly integrated inlet fitting with an outer threaded portion and a conical sealing part.

According to the invention the separating piston is formed in the form of a hollow cylindrical Cup, the inner surface of which is made conical, forming the lateral surface of a truncated cone, is coaxially located relative to the outer guide surface and facing a large base in the direction of arrangement of the gas chamber, and a lateral surface of a truncated cone made with the transition in land areas of the worked surface of the bottom part with the repetition of the configuration of the inner spherical cavity removable cover, and sealing of the piston includes two redundant sealing section, spaced in the axial direction and axially moving together with the piston along the inner wall (mirror) housing-liners pneumohydraulic accumulator with the ability to change the volume of the gas chamber, the outer surface of the piston from the location of the gas chamber, in the vicinity of the sealing area, additionally formed through local extension of the internal cavity ring filler lubricant in the form of a groove of trapezoidal cross-section with placing in it the ring maslotorgovlya harness, made of insulating and wear-resistant material such as asbestos.

According to the invention the sealing areas pneumohydraulic accumulator is made in the form embedded in the annular rectangular groove rubber rings with protective PTFE rings installed on both sides of the rubber rings, the size of the cross section of the Teflon rings in the radial direction is equal to the maximum depth of the notch.

According to the invention, the main power elements of design - case, sleeve, cover and dividing piston is made of medium-carbon low-alloy steels, hardened by heat treatment until the average values of hardness, moreover, the mirror housing-liners subjected to electroplating hard chromium plating and honing with subsequent polishing, and hemisphere separation of the piston and a removable cover formed and manufactured by pressing or deep drawing.

The proposed solution has the advantage compared with the analog prototype and other known solutions that can achieve the goal of improving the reliability, feasibility and performance characteristics of pneumatic-hydraulic accumulator by executing the latter in the form of a single block module additional module input charger with adapter connected to the power system, higher adaptability and easy installation directly on the housing of the hydraulic drive of the aircraft and dismantling of him, which allows to solve the problem of minimizing the size and weight of the hydraulic drive and provides the opportunity for Autonomous development options pneumohydraulic accumulator.

Compact and light weight pneumatic-hydraulic accumulator due to the peculiarities of the spherical shape, attached to the main power components of the battery, as well as the fact that the walls of the spherical bottom, under pressure, there are two times smaller in the order in comparison with the walls of the cylinder of the same diameter.

Due to the fact that the mass of the piston is relatively small compared to the mass moved by the operation of the battery fluid, reach the effect of increasing the speed as the acceleration of the piston or deceleration must less effort.

To achieve the target contributes to the fact that the removable end-to-end cover paired with a body-sleeve by threaded connection with additional locking (cerite-top) one or more screws into the slot in the thread at two or three points at a depth of 1...1.5 mm Such removable connection of the cover with the casing-sleeve of the inventive hydraulic accumulator in the technological plan is quite simple and has compared with the prototype of the much greater strength, reliability, ease and convenience of Assembly and disassembly during operation.

Introduction to the design of the input of the charger socket connector protects against wear of the thread of the Central inlet channel for supplying a gas into the casing-liner during valve releases site when carrying out repair and maintenance works.

In General, the proposed solution is mainly due to the need to ensure the compactness of the placement and fastening of the inventive hydraulic accumulator in the hydraulic systems of aircraft control and choose the VA is connected to the respective conduits of power.

Due to the formation of the outer surface of the casing-sleeve heat-exchange elements in the form of spaced between an annular rib managed thermodynamic processes occurring in the gas chamber during charging and discharging hydraulic accumulator, to bring to izotermicheskim that helped improve the efficiency of the hydraulic accumulator, its strength and rigidity of the hull.

Forming on the outer surface of the piston ring filler grease production maslotorgovlya harness provided the flow of liquid lubricant on the seal placed by the gas chamber during a given period of operation of the accumulator between the regular service. The use for the manufacture of the power components of the inventive hydraulic accumulator medium-carbon high-strength low-alloy steel type steel ZOGGS significantly reduce the dimensions and weight details.

In the zone of contact of the piston with the casing-sleeve implemented redundant seal with protective PTFE rings, which substantially improves the reliability of operation of the inventive hydraulic accumulator and almost completely eliminated the leakage of the working fluid in the external environment.

The application of hard chrome plating on the surface of the mirror housing-GI is ESY and application of finish machining operations mirrors in the form of honing with subsequent polishing allowed to minimize the magnitude of friction of the movement of the separating piston and significantly increase resource the work of its seals.

The essence of the invention is illustrated by drawings, where

- figure 1 shows a General view, section a pneumatic piston accumulator module implementation for built-in installation and high pressure module charger 15, with the fitting 63 is connected to the power supply system and the dividing piston 8 mounted inside the sleeve 1 with the formation of the liquid 9 and the gas 10 cameras;

- figure 2 shows a General view, the section modulus of the input of the charging device 15 with the valve hub 16 and a removable connector pipe 17 (Fig 1);

- figure 3 shows the node a in figure 1 - embodiment variant of the locking removable cover 5;

- figure 4 shows the node B in figure 1 - the design of the external sealing sections 11 and 12 of the separating piston 8 and an annular filler grease within the outer trapezoidal grooves 68 placed in her harness 69;

- figure 5 shows a General view, section a pneumatic piston accumulator module implementation for built-in installation and high pressure in a charged gas state, such as when the initial gas pressure Pn=˜110 kgf/cm2;

figure 6 shows a General view, section pavlogradskogo piston accumulator module implementation for built-in installation and high the pressure in the charged gas and working fluid condition, for example, if Rgas=Prabid.=˜220 kgf/cm2.

The inventive pneumatic-hydraulic piston accumulator module implementation for built-in installation and high pressure includes a housing-case 1 (figure 1), closed at one end a spherical head 2 with the bounding thrust end surface 3 and the throat is a Central input channel 4 for supplying a gas, a removable lid 5 with the axial channel 6 for the supply of the working fluid and the reference end face 7, the separator piston 8 mounted inside the sleeve 1 with the reciprocating movement and the formation of liquid 9 and the gas 10 chambers, the piston 8 includes two sealing portion 11 and 12, posted in the axial direction of the piston 8.

The Central input channel 4 for the supply of gas in the body of the sleeve 1 is made in the form of a threaded bore 13 with the sealing face of the groove 14. Into the threaded bore 13 is embedded input charger 15 in the form of an independent module, which includes a valve node 16 and a removable connector 17. The connector is formed in the form of a nozzle with a Central through stepped bore 18 (figure 2) and coaxially formed threaded sections 19 and 20 and the sealing sections 21 and 22, respectively.

Peripheral surface of the pipe 17 equipped with a section 23 with a multifaceted surface is STU-hex 24. Valve node 16 includes a housing 25 made in the form of a sleeve with the outer end of the threaded sections 26 and 27 and the sealing end sections 28 and 29, between which is formed by double-sided cylindrical ledge 30 and the polyhedron (hex) end bearing surface 31.

Inside the sleeve 25 with the horizontal location of the formed end guides bore - input channels 32 and outlet 33, and between them is formed by the partition wall 34 with a Central inlet 35. In the output channel 33 posted by isolating stop valve 36 with the possibility of reciprocating movement in the guide bore 33 and simultaneous contact and interaction conical sealing part 37 with a saddle 38 output channel 33 of the housing 25, and on the other hand mechanism 39 stepless adjustment efforts preload locking member 36 through the nut 40, the pre-Podiatry cylindrical compression spring 41 relative to the reference end walls 34.

Shut-off shut-off body 36 is made in the form of an Assembly unit with assasino interconnected parts - rod 42 with a spherical head and the base end 43, the threaded section 44 and a radially directed through hole 45 in the body of the rod 42, the seal 46 with a truncated conical sealing surface and an axial bore 47 and the base of the guide sleeve 48 with p is dialno located through hole 49.

The connection node of these parts are made in the form of a cylindrical pin 50 with no consoles sealed in the bearing bushing 48 ends, while interacting with shut-off shut-off body 36 of the sealing surface of the seat 38 of the outlet channel 33 is made conical. Between the walls of the outlet channel 33 and the outer surface of the support sleeve 48 is formed with a guaranteed annular gap 51 for passage of the gas environment.

On the outer surface of the casing-sleeve 1 (Fig 1) is formed with a threaded section 52 with the guide surface 53 and the sealing device 54 and the heat transfer elements in the form of spaced between each other in the axial direction of the annular ribs 55 trapezoidal shape cross-section and made in one piece with the casing-sleeve 1.

The bottom 56 of the removable cover 5 made in the form of a concave spherical surface, and the cover 5 is rigidly fixed to the body of the sleeve 1 by means of threads 57, with an emphasis on the inner face of the supporting surface 7. The cap 5 additionally secured with grub screw 58 (Fig 3).

The cover 5 is equipped with means to allow easy mounting on the housing of the hydraulic drive, the node mounting attach the hydraulic accumulator to the housing of the hydraulic drive is made in the form of the outer profiled groove 59 (Fig 1) and objetos the contour of the groove of the cylindrical shell-Hom is the 60, and the axial channel 6 for the supply of the working fluid is made in the form of a threaded bore 61 with the sealing face of the groove 62, in which the possibility of axial movement, preload and rigid fixation tightly integrated inlet port 63 with the outer threaded section 64 and the conical sealing part 65. Rigid fixation of the input nozzle 63 is a way of tightening up against the support sealing end surface and subsequent locking wire.

Dividing piston 8 is formed in the form of a hollow cylindrical Cup with an inner surface 66, passing in section 67 with a spherical bottom surface, repeating the spherical configuration of the bottom 56 of the removable cover 5.

Sealing of the piston 8 includes two redundant sealing section 11 and 12 (figure 1), and by the location of the gas chamber 10 is formed an annular filler lubricant in the form of grooves 68 (figure 4) trapezoidal section with placing in it the ring maslotorgovlya harness 69.

External sealing parts 11 and 12 of the pneumatic-hydraulic accumulator is made in the form embedded in the annular rectangular groove 70 rubber rings 71 of circular cross section with a protective Teflon rings 72, mounted on both sides of the rubber rings 71.

Pneumatic-hydraulic piston accumulator m the muzzle of performance for flush mounting and high pressure works in the following way (figure 1).

Under the action up gas pressure to the nipple threaded portion 27 of the battery charger 15 shut-off shut-off body 36 (2) withdraws from the seat 38 of the housing 25 and is charging the gas chamber 10 of the battery to the desired initial pressure, for example, up to 110...115 kgf/cm2. In the charging process chamber 10 by the gas separating piston 8 is moved to the right (figure 5) position with a focus on the end bearing surface 7 removable cover 5, and a convex spherical surface of the piston 8 is most concave spherical cavity cover 5, while maintaining the minimum required internal volume of the liquid chamber 9. In the liquid chamber 9 is the flow of working fluid through the inlet fitting 63, mounted in a removable cover 5.

Due to the fact that the pressure of the working fluid exceeds the pressure in the gas chamber is almost 2 times (210 to 230 kgf/cm2) separating piston 8 under the action of differential pressure moves to the left, towards its original position, compressing the gas and accumulating energy of the liquid (6).

The movement of the piston 8 under the action of the pressure of the working fluid occurs until equalization of the pressures in the gas chambers 10 and the liquid 9 to a value equal to the pressure of the working fluid. Allocated under this intense heat is diverted into the surrounding space CTE is kami housing-shells 1 and formed on its outer surface a heat exchange elements - ribs 55. Part of the heat is discharged through the piston 8 and the working fluid.

When the battery is discharged and making them useful work is the expansion of the gas in the gas chamber 10 which is accompanied by decrease of temperature and pressure. This process is compensated by the supply of heat from the environment through the heat exchanger annular rib 55. As a result, the differential pressure between the beginning and the end of discharge is reduced, and the external work increases, which accelerates the processes of charging and discharging for isothermal, leads to stabilization of the pressure and increase accumulated and issued by the energy accumulator.

Samples of the inventive pneumatic-hydraulic piston accumulator for high pressure underwent in-plant and operational tests on the drives and control systems of aircraft. Tests confirmed the accuracy inherent in the design of the inventive pneumatic-hydraulic piston accumulator technical solutions and the possibility of obtaining a technical result consists in the possibility of creating a promising series pneumatic-hydraulic piston accumulators modular design for flush mounting and high pressures, different operational reliability, compact design, easy installation, directly the public in case of hydraulic drive, the convenience of connecting the hydraulic power and the possibility of Autonomous testing specifications.

1. Pneumatic-hydraulic piston accumulator module implementation for built-in installation and high pressure, comprising a housing made in the form of a cylindrical sleeve closed at one end and a spherical bottom with the bounding thrust face surface and a neck - Central inlet channel for supplying a gas, a removable lid with an axial channel for supplying a working fluid and a support end, a dividing piston mounted inside the sleeve with the possibility of reciprocating movement and formation of liquid and gas chambers, and the piston includes two sealing section, spaced apart in the axial direction of the piston and moving along the inner wall of the pneumatic-hydraulic accumulator, characterized in that pneumohydraulic accumulator comprising a casing in the form of a cylindrical sleeve closed at one end and a spherical bottom, a removable lid with a channel for supplying the working fluid and the separating piston is formed as a single unit module with the possibility of hard attach directly to the housing of the hydraulic drive of the aircraft, Autonomous mining technical characteristics and education tract the history of the passage of the gas medium in one direction, with this Central inlet for supplying a gas in the housing is a sleeve made in the form of a threaded bore with the sealing face of the groove in the threaded bore coaxial with the possibility of axial movement, preload and rigid fixation in all directions tightly integrated input charger, which is structurally and functionally formed in the layout independent module, the module contains a valve site with locking elements of type "valve-seat and a removable connector, and the connector is formed in the form of a nozzle with a Central stepped through bore and coaxially formed inner and outer threaded and sealing areas with the possibility of a tight gas chambers messages pneumatic-hydraulic accumulator and the internal cavity of the valve block between themselves, with the peripheral surface of the pipe is additionally equipped area with a multifaceted surface, the valve unit is designed with a trajectory passing gas medium in one direction and includes a housing made in the form of a sleeve with outer end threaded and mechanical seal parts, between which the formed double-sided cylindrical ledge and a polyhedron with a mechanical reference surface, inside sleeve coaxial outer mounting surface with OPOS Tim location formed by mechanical guides bore - channels of input and output, and between them is formed a partition with a Central inlet at one side of the partition, in the output channel, posted by shut-off shut-off body with the possibility of reciprocating movement in the guide bore and simultaneous contact and interaction conical sealing part with the saddle of the output channel of the body, and on the other hand, the mechanism for stepless adjustment efforts preload valve body through the nut, pre-Podiatry cylindrical compression spring relative to the reference end walls and are secured by a spring ring, with shut-off shut-off body is structurally designed in the form of an Assembly unit with assasino interconnected parts - a rod with a spherical head and a support end, a threaded section with a recess and the end of the groove and radially directed through hole in the body of the rod seal with a truncated conical sealing surface and the axial hole and the base of the guide sleeve with radially located through hole, and the connection node of these parts are made in the form of a cylindrical pin with no consoles sealed in the bearing sleeve ends, while interacting with shut-off shut-off body sealing surface of the seat of the outlet channel of the chassis is being tapered, forming a lateral surface of a truncated cone, is coaxially located relative to the cylindrical guide bore and facing a smaller base in the direction of arrangement of the input channel, and the corners of a truncated cone seat and shut-off shut-off organ is made with equal values in the range from 28 to 35°also between the walls of the outlet channel and the outer surface of the support sleeve is formed of a guaranteed annular gap for the passage of the gas environment.

2. Pneumatic-hydraulic piston accumulator according to claim 1, characterized in that on the outer surface of the casing-liner is formed from the side of the open part is a threaded section with the track surface and the sealing device, and in the middle of the heat exchange elements in the form of advanced peripheral surface with the formation therein of a number of spaced each other at an equal distance in the axial direction of the annular ribs with trapezoidal shape cross-section and made in one piece with the casing-sleeve, with an annular rib equidistant radially from the longitudinal axis of the housing-liners, and the ratio of the height of the trapezoid cross-section of the ribs to the diameter of the mirror housing-the liner is selected in accordance with a ratio of

HTr/D3≥0,028,

where NTr- the altitude of the trapezoid cross-section kolicevo what about the ribs, mm;

D3- diameter of mirror housing-liners, mm.

3. Pneumatic-hydraulic piston accumulator according to claim 1, characterized in that the bottom of the removable cover is made in the form of a concave spherical surface, and the cover is rigidly fixed to the body of the sleeve by a threaded connection and the axial preload via formed on the inner surface of the annular support face surface with additional external locking of one or more set screws, evenly spaced around the circumference and are secured by cerite-top into the slot in the thread at two or three points the depth of 1,0...1,5 mm with corner punch 60°and a removable cover provided with means to allow easy installation of a pneumatic-hydraulic accumulator directly on the body hydraulic actuator, and connecting the accumulator to the hydraulic system of the power, while the node mounting attach the battery to the actuator housing is made in the form of the outer profiled grooves and objetos the contour of the groove of the cylindrical shell-yoke, and an axial channel for supplying a working fluid is made in the form of a threaded bore with the sealing face of the groove, in which the possibility of axial movement, preload and rigid fixation in all directions tightly integrated input fitting with external threads which the first portion and a conical sealing part.

4. Pneumatic-hydraulic piston accumulator according to claim 1, characterized in that the separating piston is formed in the form of a hollow cylindrical Cup, the inner surface of which is made conical, forming the lateral surface of a truncated cone, is coaxially located relative to the outer guide surface and facing a large base in the direction of arrangement of the gas chamber, and a lateral surface of a truncated cone made with the transition in the area of the spherical surface of the bottom part with the repetition of the configuration of the inner spherical cavity, the removable lid, and the sealing portion of the piston includes two redundant sealing section, spaced in the axial direction and axially moving together with the piston along the inner wall (mirror) housing-sleeves pneumohydraulic accumulator with the ability to change the volume of the gas chamber, the outer surface of the piston from the location of the gas chamber, in the vicinity of the sealing area, additionally formed through local extension of the internal cavity ring filler lubricant in the form of a groove of trapezoidal cross-section with placing in it the ring maslotorgovlya harness, made of insulating and wear-resistant material such as asbestos.

5. Pneumatic-hydraulic piston accumulator according to claim 1 or 4, characterized in that the sealing areas pneumohydraulic accumulator is made in the form embedded in the annular rectangular groove rubber rings with protective PTFE rings installed on both sides of the rubber rings, the size of the cross section of the Teflon rings in the radial direction is equal to the maximum depth of the notch.

6. Pneumatic-hydraulic piston accumulator according to claim 1, characterized in that the main power elements of design - case, sleeve, cover and dividing piston is made of medium-carbon low-alloy steels, hardened by heat treatment until the average values of hardness and mirror housing-liners subjected to electroplating hard chromium plating and honing with subsequent polishing, and hemisphere separation of the piston and a removable cover formed and manufactured by pressing or deep drawing.



 

Same patents:

FIELD: engines and pumps.

SUBSTANCE: accumulator is designed to accumulate power in hydraulic drives with alternating consumption of liquid power. The accumulator comprises case made as a cylinder sleeve with a dead spherical bottom which has a stop support end surface and a central inlet for gas supply, removable cover with an axial hole for supplying working liquid and an end support, dividing piston installed inside the case-sleeve and capable of reciprocal motion thus creating liquid and gas chambers; at that the piston includes two packing portions, mutually spaced in the axial direction of the piston and moving along the inside wall of pneumatic hydraulic accumulator, at that a threaded portion is formed on the outside surface of the case-sleeve from the open part side, this threaded portion has a directing surface and a packing device, while the medium part has heat exchanging elements in kind of a developed peripheral surface with a formation of a row of ring ribs mutually and evenly spaced on the said surface in the axial direction; the said ribs have trapezoid section and made integrally with a case-sleeve.

EFFECT: increase of operational reliability, safety, manufacturability and maintainability.

5 cl, 5 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to hydraulic systems and it can be used in different vehicles and machine-and-tractor sets operating under unsteady conditions. Proposed device contains planetary train 1 consisting of crown gear 2 and reaction member 3. Reaction member 3 is connected with gear 4 of drive of oil pump 5 and gear 6 of drive of hydraulic motor 7. Gear 4 of drive of oil pump 5 is connected with pump through overrunning clutch 8. Gear of drive of hydraulic motor 7 is connected with hydraulic motor 7 through overrunning clutch 9. Oil pump 5 is connected to suction main line 10 and pressure main line 11. Hydraulic motor 7 is connected to pressure main line 12 and return main line 13. Planetary train 1 is connected with gearbox 15 by shaft of carrier 14 and is set into motion by clutch 16 of engine 17. Adjustable throttle 18 is installed in pressure main line 11. Safety valve 19, control cock 20 and control hydraulic main line 21 with hydraulic distributor 22 are connected to pressure main line 11 before adjustable throttle 18. Device contains also hydraulic tank 26 and pneumohydraulic accumulator 27 consisting of three spaces.

EFFECT: increased efficiency of device.

1 dwg

FIELD: transport engineering.

SUBSTANCE: invention can be used on vehicles operating under unstable conditions of movement. According to invention, nonlinear hydraulic damping unit is installed in transmission of vehicle. Said unit contains adjustable restrictor and least two pneumohydraulic accumulators of different rigidly. One input of restrictor is connected with main pneumohydraulic accumulator, and second input, with inputs of each additional pneumohydraulic accumulators.

EFFECT: improved reliability and increased durability of parts of power train owing to stepless change of torque transmitted from engine to wheels or tracks.

1 dwg

FIELD: installations for supplying fluid under pressure.

SUBSTANCE: method comprises determining the value of pressure in the vessel preliminary filled with explosion-proof compressible fluid and connected with the distributing device, comparing the value with that required for operation of the motor, and switching valving by the command signal to the air-operated motor of the drive. When the value of pressure in the vessel is higher or equal to the permissible value, the explosion-proof fluid is supplied from the vessel to the air-operated motor, whereas the pumped fluid is not supplied from the pipeline. When the value of pressure is lower than the permissible value, the pumped fluid is supplied from the pipeline to the air-operated motor, and the fluid is not allowed to enter the vessel.

EFFECT: improved environmental protection.

9 cl, 6 dwg

FIELD: transport engineering.

SUBSTANCE: invention can be used in transmissions of tractors and road-building machines under unstable motion conditions. Proposed transmission of vehicle has planetary reduction gear coupled with engine, pneumohydraulic accumulator, hydraulic pump mechanically coupled with one of links of planetary reduction gear. Fitted in pressure main lone are hydraulic distributor and additional three-dimensional member containing adjustable restrictor connected with variable rigidity pneumohydraulic accumulator. Drain main line of pneumohydraulic accumulator is connected through reduction valve with suction main line of hydraulic pump and drain main line of hydraulic distributor.

EFFECT: protection of engine and parts of power train from peak loads by means of reducing valve and from dynamic loads at starting from half, optimization of operation of engine, reduced specific consumption on fuel.

1 dwg

FIELD: fluid-pressure actuators.

SUBSTANCE: supply unit comprises hydraulic accumulator, housing, and slide of the reduction valve which is mounted in the housing to define pressure, drain, and reduced pressure spaces. The slide is mounted for permitting disconnection of the pressure space from the reduction space. The hydraulic accumulator is connected with the housing from the side of the space of the reduction pressure. The safety valve is interposed between the space of the reduced pressure and the drain space. The trough opening that connects the space of the reduced pressure with the space of the safety valve is made along the axis of the slide. The safety valve is mounted in the drain space for permitting it to be pressed to the face surface of the slide by means of its spring. Between the pressure space and pressure line is the check valve that prevents the fluid to flow into the pressure line. The slide is made of the direct-action valve provided with the shank that is inserted in the drain space. The part of the slide that is opposite to the shank is diverging from the shank body and bears on the seat defined by the projections on the housing. The area of the inner section defined by the line of contact between the seat and slide of the reduction valve is greater that that of the inner section defined by the line of contact between the face part of the slide shank and safety valve.

EFFECT: enhanced reliability.

8 cl, 2 dwg

FIELD: hydraulics.

SUBSTANCE: fluid-pressure accumulator comprises cylindrical housing provided with gas and liquid spaces separated by the fluid separator of buoy type and shutoff valve provided with the gate and seat made of truncated cone and arranged on the bottom of the fluid separator and connecting pipe for supplying fluid, respectively. The bottom of the fluid separator is made of the gate having inner conical surface. The seat has outer mating surface.

EFFECT: enhanced reliability and increased longevity.

3 dwg

FIELD: fluid-pressure actuators.

SUBSTANCE: fluid-pressure diaphragm accumulator comprises tank separated into gas and liquid spaces by the diaphragm. The top wall of the tank is provided with the unit for control of compressed air. The housing of the unit has the vertical cylindrical passage that enters the gas space of the tank and two cylindrical passages arranged perpendicular to it and receives identical valves spring-loaded to the connecting pipe faces by springs. The connecting pipes are mounted in the housing in front of the valves and overlap the nozzle opening for the inflowing compressed air into the space of the tank. The other connecting pipe receives the reducing valve and nozzle opening for discharging the compressed gas to the atmosphere. The vertical passage and longitudinal through grooves in the valve receive master cam which is connected with the diaphragm and cooperates with the stops of its valves by means of cam when the diaphragm moves outside of the specified working zone.

EFFECT: enhanced reliability.

11 dwg

FIELD: mechanical engineering; machine building hydraulics.

SUBSTANCE: invention can be used on vehicles and machine-and-tractor units operating under unsteady conditions of movement. Proposed device contains planetary train 1, reactive link 3 connected with drive gear of oil pump 5. Planetary train is connected through carrier shaft with gearbox 9 and is set into operation by engine 11. Two-step adjustable restrictor 12 is installed in pressure main line of pump. Safety valve 14 and control cock 15 are connected to input of adjustable restrictor, being also installed in pressure main line of pump pneumohydraulic accumulator, being end member of pressure main line, is provided with three spaces. It consists of hydraulic cylinder, free piston, piston with rod, piston position regulator, oil line and oil channel. Space between pistons is filled with oil which regulates volume.

EFFECT: reduced influence of vibrations of external traction load onto functioning of machine-and-tractor unit.

2 dwg

The invention relates to the field of defence and can be used to create hydraulic systems, missile launchers, mounted on ships and shore facilities

FIELD: mechanical engineering; machine building hydraulics.

SUBSTANCE: invention can be used on vehicles and machine-and-tractor units operating under unsteady conditions of movement. Proposed device contains planetary train 1, reactive link 3 connected with drive gear of oil pump 5. Planetary train is connected through carrier shaft with gearbox 9 and is set into operation by engine 11. Two-step adjustable restrictor 12 is installed in pressure main line of pump. Safety valve 14 and control cock 15 are connected to input of adjustable restrictor, being also installed in pressure main line of pump pneumohydraulic accumulator, being end member of pressure main line, is provided with three spaces. It consists of hydraulic cylinder, free piston, piston with rod, piston position regulator, oil line and oil channel. Space between pistons is filled with oil which regulates volume.

EFFECT: reduced influence of vibrations of external traction load onto functioning of machine-and-tractor unit.

2 dwg

FIELD: fluid-pressure actuators.

SUBSTANCE: fluid-pressure diaphragm accumulator comprises tank separated into gas and liquid spaces by the diaphragm. The top wall of the tank is provided with the unit for control of compressed air. The housing of the unit has the vertical cylindrical passage that enters the gas space of the tank and two cylindrical passages arranged perpendicular to it and receives identical valves spring-loaded to the connecting pipe faces by springs. The connecting pipes are mounted in the housing in front of the valves and overlap the nozzle opening for the inflowing compressed air into the space of the tank. The other connecting pipe receives the reducing valve and nozzle opening for discharging the compressed gas to the atmosphere. The vertical passage and longitudinal through grooves in the valve receive master cam which is connected with the diaphragm and cooperates with the stops of its valves by means of cam when the diaphragm moves outside of the specified working zone.

EFFECT: enhanced reliability.

11 dwg

FIELD: hydraulics.

SUBSTANCE: fluid-pressure accumulator comprises cylindrical housing provided with gas and liquid spaces separated by the fluid separator of buoy type and shutoff valve provided with the gate and seat made of truncated cone and arranged on the bottom of the fluid separator and connecting pipe for supplying fluid, respectively. The bottom of the fluid separator is made of the gate having inner conical surface. The seat has outer mating surface.

EFFECT: enhanced reliability and increased longevity.

3 dwg

FIELD: fluid-pressure actuators.

SUBSTANCE: supply unit comprises hydraulic accumulator, housing, and slide of the reduction valve which is mounted in the housing to define pressure, drain, and reduced pressure spaces. The slide is mounted for permitting disconnection of the pressure space from the reduction space. The hydraulic accumulator is connected with the housing from the side of the space of the reduction pressure. The safety valve is interposed between the space of the reduced pressure and the drain space. The trough opening that connects the space of the reduced pressure with the space of the safety valve is made along the axis of the slide. The safety valve is mounted in the drain space for permitting it to be pressed to the face surface of the slide by means of its spring. Between the pressure space and pressure line is the check valve that prevents the fluid to flow into the pressure line. The slide is made of the direct-action valve provided with the shank that is inserted in the drain space. The part of the slide that is opposite to the shank is diverging from the shank body and bears on the seat defined by the projections on the housing. The area of the inner section defined by the line of contact between the seat and slide of the reduction valve is greater that that of the inner section defined by the line of contact between the face part of the slide shank and safety valve.

EFFECT: enhanced reliability.

8 cl, 2 dwg

FIELD: transport engineering.

SUBSTANCE: invention can be used in transmissions of tractors and road-building machines under unstable motion conditions. Proposed transmission of vehicle has planetary reduction gear coupled with engine, pneumohydraulic accumulator, hydraulic pump mechanically coupled with one of links of planetary reduction gear. Fitted in pressure main lone are hydraulic distributor and additional three-dimensional member containing adjustable restrictor connected with variable rigidity pneumohydraulic accumulator. Drain main line of pneumohydraulic accumulator is connected through reduction valve with suction main line of hydraulic pump and drain main line of hydraulic distributor.

EFFECT: protection of engine and parts of power train from peak loads by means of reducing valve and from dynamic loads at starting from half, optimization of operation of engine, reduced specific consumption on fuel.

1 dwg

FIELD: installations for supplying fluid under pressure.

SUBSTANCE: method comprises determining the value of pressure in the vessel preliminary filled with explosion-proof compressible fluid and connected with the distributing device, comparing the value with that required for operation of the motor, and switching valving by the command signal to the air-operated motor of the drive. When the value of pressure in the vessel is higher or equal to the permissible value, the explosion-proof fluid is supplied from the vessel to the air-operated motor, whereas the pumped fluid is not supplied from the pipeline. When the value of pressure is lower than the permissible value, the pumped fluid is supplied from the pipeline to the air-operated motor, and the fluid is not allowed to enter the vessel.

EFFECT: improved environmental protection.

9 cl, 6 dwg

FIELD: transport engineering.

SUBSTANCE: invention can be used on vehicles operating under unstable conditions of movement. According to invention, nonlinear hydraulic damping unit is installed in transmission of vehicle. Said unit contains adjustable restrictor and least two pneumohydraulic accumulators of different rigidly. One input of restrictor is connected with main pneumohydraulic accumulator, and second input, with inputs of each additional pneumohydraulic accumulators.

EFFECT: improved reliability and increased durability of parts of power train owing to stepless change of torque transmitted from engine to wheels or tracks.

1 dwg

FIELD: transport engineering.

SUBSTANCE: invention relates to hydraulic systems and it can be used in different vehicles and machine-and-tractor sets operating under unsteady conditions. Proposed device contains planetary train 1 consisting of crown gear 2 and reaction member 3. Reaction member 3 is connected with gear 4 of drive of oil pump 5 and gear 6 of drive of hydraulic motor 7. Gear 4 of drive of oil pump 5 is connected with pump through overrunning clutch 8. Gear of drive of hydraulic motor 7 is connected with hydraulic motor 7 through overrunning clutch 9. Oil pump 5 is connected to suction main line 10 and pressure main line 11. Hydraulic motor 7 is connected to pressure main line 12 and return main line 13. Planetary train 1 is connected with gearbox 15 by shaft of carrier 14 and is set into motion by clutch 16 of engine 17. Adjustable throttle 18 is installed in pressure main line 11. Safety valve 19, control cock 20 and control hydraulic main line 21 with hydraulic distributor 22 are connected to pressure main line 11 before adjustable throttle 18. Device contains also hydraulic tank 26 and pneumohydraulic accumulator 27 consisting of three spaces.

EFFECT: increased efficiency of device.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: accumulator is designed to accumulate power in hydraulic drives with alternating consumption of liquid power. The accumulator comprises case made as a cylinder sleeve with a dead spherical bottom which has a stop support end surface and a central inlet for gas supply, removable cover with an axial hole for supplying working liquid and an end support, dividing piston installed inside the case-sleeve and capable of reciprocal motion thus creating liquid and gas chambers; at that the piston includes two packing portions, mutually spaced in the axial direction of the piston and moving along the inside wall of pneumatic hydraulic accumulator, at that a threaded portion is formed on the outside surface of the case-sleeve from the open part side, this threaded portion has a directing surface and a packing device, while the medium part has heat exchanging elements in kind of a developed peripheral surface with a formation of a row of ring ribs mutually and evenly spaced on the said surface in the axial direction; the said ribs have trapezoid section and made integrally with a case-sleeve.

EFFECT: increase of operational reliability, safety, manufacturability and maintainability.

5 cl, 5 dwg

FIELD: engines and pumps.

SUBSTANCE: device is designed to accumulate power in variable liquid power consumption hydraulic drives, to damp pressure pulsations and to kill hydraulic shocks in supply hydraulic systems. The accumulator incorporates a cylindrical barrel casing, its one end being closed by a spherical bottom with a limiting thrust end face surface, a casing neck making a central gas inlet, a detachable cover furnished with an axial channel to feed working fluid and a thrust end face, a separating piston arranged inside the barrel so as to reciprocate and to form a fluid and gas chambers. Here note that the piston includes two sealing sections spaced axially apart and moving along the accumulator inner wall. Note also that the accumulator represents an integral compact unit, a module, that can be built easily and directly into the system hydraulic drive, the said module incorporating a valve unit with shutting off elements of the "valve-seat" type and detachable coupler.

EFFECT: higher reliability and safety, ease of manufacture and repair.

6 cl, 6 dwg

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