Channel of opposite flows of multiflow hydraulic actuator
FIELD: machine building.
SUBSTANCE: invention refers to machine-building hydraulics, and namely to hydraulic actuators of mobile machines and hydraulic plants of cyclic action with several actuating mechanisms. The invention proposes a channel of multiflow hydraulic actuator, which is intended for supply of a working liquid flow to pressure cavities and consists of several in-series connected double flow cavities having the possibility of disconnecting their inlets and outlets. Besides, on the flow inlet side, each double flow cavity is connected to the corresponding pressure cavity. Besides, in ties between pressure and overflow cavities there additionally installed are check valves directed with their outlets to pressure cavities. And outlets of double flow cavities are connected through inlets of check valves to the corresponding pressure cavities. Besides, the outlet of the last double flow cavity serves as an inlet for the other flow.
EFFECT: proposed invention allows supplying two independent flows via one hydraulic channel with several pressure cavities, as well as simplifying a hydraulic actuator and reducing dimensions of hydraulic equipment.
2 cl, 8 dwg
The invention relates to oil hydraulics, in particular for mobile hydraulic machines and hydraulic installations cyclic actions with multiple actuators.
Known hydraulic actuators excavators, cranes and manipulators in which the channels supplying the working fluid from the pressure line, are connected with the multiple pressure cavities, which are powered using hydraulic actuators at their inclusion. Depending on the functions inherent in the hydraulic actuator, these channels can be performed on various options.
When required the simultaneous supply of fluid to the several actuators, the channel is so that he combined pressure cavity corresponding to these mechanisms, the parallel scheme (Risa, ). This version of a channel characteristic for valves of the type MO Bosch Rexroth AG, it provides a parallel connection circuit spools to the head .
The disadvantage of this variant channel, the inlet flow is that it does not allow combining two or more workers movements regulate their speed, as the fluid tends to flow into the hydraulic motor of the working body with the least external resistance.
When you want to exclude completion of the second fluid input to more than one mechanism, used another variant of the channel. This channel is formed of several series connected dual-flow cavities communicating with each other.
This variant channel provides individual wiring actuators. Moreover, the priority of the connection head, in case of simultaneous activation of several mechanisms, the mechanism of the pressure cavity which is supplied from the flow cavity located closest to the beginning of the channel. The working fluid will be supplied to the corresponding pressure cavity. When this actuator passage between the cavities dual flow cavity will be closed, therefore, the supply of working fluid to the mechanisms, powered from the following dual flow cavities will not (Resv, ).
This variant of the inlet flow channel, providing individual wiring actuators to the head, is the closest analogue of the proposed technical solution and adopted for the prototype.
This invention solves the following tasks:
(a) flow through a single channel of two independent flows into the discharge cavity corresponding to any of the valve;
b) flow through a single channel of two independent from each other in separate threads of the pressure cavity of the two, the priority is to maintain spools enabling multiple spools.
C) simplify the design of hydraulic machines.
This technical result is achieved by the fact that one of the inlet channel with different end serves two independent flow directed towards each other. To ensure the function of adding threads when one of the actuator, as well as to ensure simultaneous operation of actuators each of its flow, all flow cavity of such a channel connected through the input non-return valves with the corresponding pressure cavities.
Figure 1 illustrates the case of a channel that is identical to the one adopted for the prototype. Figure 2 shows the channel counter-flows, which is the subject of this invention. On both figures shows the channels in which the flow cavity is locked by means of a cylindrical spool, and, on these figures and the following shows the cavity, which form the channel of the counter flow. Other cavities that are not related to the channel counter currents, conventionally not shown. Figure 3 shows a diagram of a hydraulic channel counter currents. Figure 4 arrows show the direction of flow by locking the second from the bottom of the flow cavity. Figure 5 is the same as for locking the first and third flow cavity. Figure 6 shows a variant of the channel counter-flows with divisive element, made in the IDA controlled valve and the direction of flow upon closing the second flow cavity. 7 - direction of traffic flow for locking the first and third flow cavities channel counter flow valve divisive element. On Fig shows a simplified diagram of the hydraulic drive with individual wiring mechanisms to two independent streams using a single channel counter currents. For clarity, the elements of the channel counter-flows on Fig shows thickened lines.
The channel counter streams includes a pressure cavity 1-4, dual flow cavity 5-8, with inputs 9-12 and outputs 13-16, check valves 17-24, entry 25 for the second thread. Inputs 9-12 and outputs 13-16 are connected through check valves 17-24 with pressure cavities 1-4.
In case the channel counter of threads according to claim 2, all these elements are in the housing 26 threaded hydraulic valve (figure 2, 6).
The channel counter flow works as follows. In the neutral position all dual flow cavity 5-8 not locked, the channel is open along the entire length of the entrance 9 to the second input 25 (figure 2, 3, 8), the pressure in the channel is minimum, check valves 17-24 closed, the pressure cavity 1-4 disconnected from the Executive mechanisms.
When enabled, only one actuator is overlapping channel counter-flows, for example, in a double-flow cavity 6. The input 10 and the output 14 is the cavity are separated. Thread P1 from the input 9, bypassing the open double flow cavity 5 through the check valve 19 is directed into the discharge cavity 2. The second stream P2 from the entrance 25, bypassing the open double flow cavity 8 and 7 through the check valve 20, is directed also to the pressure cavity 2. As a result, to the actuator is routed to the total flow of the two streams, which allows to increase the maximum possible speed that the actuator (4, 6).
If you try to connect a few more actuators, for example, in addition to block double the flow cavity 5 and 7 (figure 5, 7), the discharge flow P1 from the input 9 through the check valve 17 will be directed into the discharge cavity 1, and from there to appropriate it to the Executive mechanism. The flow passage P1 to the pressure cavity 6, block double locked the flow cavity 5, which is located closer to the input 9 of the flow P1.
The second discharge flow P2 will go from the entrance 25, bypassing the open flow-through chamber 8 through the check valve 22, pressure in the cavity 3, and then to the appropriate it to the Executive mechanism. The flow passage P2 to the pressure cavity 2 will overlap the double locked the flow cavity 7, which is located close to the inlet 25 of flow P2. As a result, movement of the actuator corresponding to the pressure cavity 2 will become impossible.
Fulfill the capacity mechanism, the corresponding pressure cavity 1 is connected to the pressure P1, and the actuator corresponding to the pressure cavity 3, is connected to the pressure P2. Thus, to be implemented independent simultaneous operation of two Executive bodies, have priority over previously included Executive body.
1. Channel multi-threaded hydraulic actuator, intended for the supply of the working fluid flow to the pressure cavities, consisting of several series connected dual-flow cavities, having the opportunity to divide their inputs and outputs, and from the input stream each dual flow cavity is associated with the pressure cavity, characterized in that the relationship between pressure and overflow cavities are installed check valves, aimed their outputs to the pressure cavities, and outputs dual flow cavities are connected through the input non-return valves with the respective pressure chambers and the release of the latest dual flow cavity serves as input for another thread.
2. Channel according to claim 1, characterized in that it is made in the case of multithreaded hydraulic distributor.
FIELD: machine building.
SUBSTANCE: flow regulator comprises a body, in bores of which there are the following components installed and joined in accordance with the diagram by hydraulic lines: a controlled throttle, an overflow valve, a safety valve, with places of connection of supply channels, drain channels and an operating channel. In the hydraulic line of control there is a throttle with a slot filter, the filtering function in which is performed by the bore of the filter body and the inner surface of the external bushing.
EFFECT: higher dynamic characteristics, lower weight and dimensions of a flow controller.
FIELD: machine building.
SUBSTANCE: unit is used to provide wheel turn at running of aircrafts both for direct control and for damping of oscillations at freely oriented wheel turn, as well as to implement damping mode at absence of working fluid pressure in hydraulic power supply channels. Units includes a housing with hydraulic lines connected to supply and discharge lines of a hydraulic system, on which an electrohydraulic power amplifier is installed; hydraulic assemblies are arranged inside the housing and connected to each other and to electrohydraulic power amplifier through a system of hydraulic lines. The above hydraulic assemblies include a check valve of supply hydraulic line, a filter, makeup and safety valves, an electrohydraulic valve, an activation valve, a hydraulic compensator with a cover plate and a spring-loaded piston interacting with spring of shutoff valve of discharge hydraulic line; hydraulic compensator is equipped with an induction sensor presenting information on position of hydraulic compensator piston, and therefore, on possibility of performing damping functions at absence of pressure in hydraulic power supply channels.
EFFECT: enhanced reliability.
FIELD: machine building.
SUBSTANCE: valve element for controlled non-return valve of fastening post includes housing (72, 74) of element. In housing (72, 74) there located is valve piston (78), U-shaped control piston (76) and piston spring (84). One end of valve piston is placed in guide piston (76) so that it can be moved. Control piston (76) has through hole (88) in its bottom (86). Inside control piston (76) between bottom (86) of piston and end of valve piston (78) there located is auxiliary piston (90). There is design of controlled non-return valve for fastening section of powered support.
EFFECT: pressure stabilisation of controlled non-return valve.
8 cl, 4 dwg
FIELD: machine building.
SUBSTANCE: device (1) for distribution of fluid medium consists of modules (5) of direction of fluid medium and assembly of functional elements (7), and of case (3) with at least one side (9) of modules (5) fastening. Also, the said side (9) of fastening consists of uniform net of devices (11) of modules fastening. Channel (13) for fluid medium is made inside case (3).
EFFECT: decreased dimensions of device.
13 cl, 7 dwg
FIELD: machine building.
SUBSTANCE: modular connecting system consists of connecting device (200, 201) with cylinder central section (224) with through orifice (208) running from front surface (206) of connecting device (200, 201) to back side of connecting device. Connecting device (200, 201) has the first (220) and the second (222) blades passing radially from in general cylinder-shaped central section (224) of connecting device (200, 201). First lug (202) runs from the front side of the first blade to an upper side of connecting device (200, 201) while second lug (204) runs from the back side of the first blade to a lower side of connecting device (200, 201). Third lug (202) runs from the front side of the second blade to the lower side of connecting device (200, 201) while second lug (204) runs from the back side of the first blade to the upper side of connecting device (200, 201).
EFFECT: expanded functionality.
22 cl, 19 dwg
FIELD: machine building.
SUBSTANCE: proposed distributing unit is intended for hydraulic systems and incorporates check valve 2, three two-position two-line distributors 3, 4, 5 arranged in the body 1, each furnished with a spring-loaded step valve with a control chamber, piston and con rod interacting with inlet and outlet hydraulic lines of distributors 3 to 5 in unit body 1. Body 1 has three feed channels 6, 7, 8, three discharge channels 9, 10, 11 and drain channel 12 communicating with spring spaces 13, 14, 15 of distributors 3, 4, 5. Distributor 5 is normally-closed and spring-loaded on the side of its piston, while its con rod control chamber 16 communicates with the outlet of check valve 2 and with the piston control spaces 17, 18 of the other two normally-open distributors 3, 4, respectively. The first channel 6 of body 1 communicates with the inlet of check valve 2, the outlet of which is connected to the first discharge channel 9 and to the inlet hydraulic line of the thirds distributor 5 communicating with, via the outlet hydraulic line, with the third channel 11 of the branch pipe of body 1. The inlet hydraulic lines of the first and second distributors 3, 4 are interconnected and jointed to the second feed line 7, while the outlet hydraulic lines communicate with the second and third discharge channels 9, 10, respectively. Channel 11 of the third offtake accommodates throttle 19. Second feed channel 7 and third 11 offtake channels are interconnected via valve 20. The second offtake channel 10 accommodates additional valve 21. The unit is furnished with expander 22 to separate suspended and dissolved air, the expander upper part being connected via pipelines (nor designated) with the third offtake channel 11 and it lower part being connected with the third supply channel 8 of the housing 1 of the unit.
EFFECT: expanded performances for operation in, at least, four operating conditions with simultaneous or serial operation of any of both pumps.
4 cl, 5 dwg
SUBSTANCE: hydraulic control valve with reserved electric power controlled wheel steering drive of front chassis support of vehicle refers to engineering electro-hydraulic automatics and may be used in drive gear with highly reliable reserved electric power remote control. Hydraulic control valve contains casing with channel ducts for hydraulic feeding and work cavity channels, electric hydraulic valve with double-wound coil and ball valve, ring valve, hydraulic compensator with lid and spring-loaded piston, safety and feeder valves between work cavity channels, needle-shaped throttle with adjusting screw, and two-stage electrohydraulic amplifier. There is throttle orifice in ring valve collar, orifice being connected with needle-shaped throttle and spring-loaded valve cavity, hydraulic compensator lid being separated from ambient air by pneumatic check valve.
EFFECT: increase of reliability, guaranteed life increase.
3 cl, 4 dwg
SUBSTANCE: device varies and adjusts liquid and gaseous media flows passing therein as to flow rate, pressure or temperature. The said device connected to pressure and discharge lines contains a flow regulator with a certain power drive complying with the flow adjusting device maximum performances and allowing variation in throughput and preset output parameter. The device incorporates a setting regulator with throughput parameters equal to or higher than those of the said device and with the drive complying with the flow adjusting device maximum performances and allowing variation in throughput and preset output parameter within the limits of settings, the setting regulator being mounted in the line parallel to the flow regulator, and a control system.
EFFECT: invention allows higher accuracy of the output parameters, higher reliability and longer life, lower operating costs.
SUBSTANCE: ripper contains bidirectional liquid energy accumulator, underlying machine, framed suspension with hinged ripper tip mounted on it and elastic system. At that elastic system contains the main cylinder with piston at the rod mounted on the frame and power-operated rod passing through articulated rod and ripper tip. At that the main cylinder is divided by partition into two independent cylinders equipped with main and auxiliary cavity. In auxiliary cavities of cylinders there are installed pistons connected to hollow rods which interact with power-operated rods passing through the main cavities and fixed at inners walls of travelling barrel covering the main cylinder which is connected to ripping rack through a hinge. Auxiliary cavities of each cylinder are equipped with openings from rod side and free piston side, which interact with reversive hydro pump through bidirectional hydraulic locks and pipelines. Besides elastic system is equipped with auxiliary reversive hydro pump which outlet is connected though bidirectional hydraulic locks to openings in walls of the main cylinder cavities while its inlet is connected to pipeline with a tank for liquid storage.
EFFECT: increasing efficiency of soil ripping due to reduction of pulling force and dynamic loads acting on underlying machine and their transfer to the area of soil destruction within the wide range for forced oscillation frequencies of actuating device.
FIELD: engines and pumps.
SUBSTANCE: proposed device comprises control means and detection means. Control means serve to control engine output power for driving the machine. Detection means allow identification of reverse conditions, motion speed and preset gear ratio. In reverse, control means vary output power by control over engine shaft rpm.
EFFECT: fuel savings.
3 cl, 7 dwg
SUBSTANCE: loader boom hydraulic cylinder is proposed, comprising a body, lower and upper covers of the hydraulic cylinder, a braking device and a check valve. At the same time the check valve is made in the form of a cylindrical cap with a spring inside and an inlet nozzle installed in a separate body fixed on the hydraulic cylinder body. Besides, the specified valve communicates with the piston cavity of the hydraulic cylinder by means of an additional hole made in the hydraulic cylinder body.
EFFECT: elimination of piston strikes against a hydraulic cylinder cover as a loader boom is installed in a position of excavating start at the level of the support surface.
SUBSTANCE: collector of bulldozer equipment of an earth mover is proposed, which comprises a body with radial holes for supply and discharge of working fluid, connected as capable of rotation and axial displacement with a blade frame. Inside the body there is a part of a fixed core, installed with a gap into eyes of the blade frame and stopped by the other part against rotation in a lever of a blade lifting mechanism. Besides, the body is equipped with a leash element with a through slot. The fixed core is made with circular grooves for installation of seals and circular bores, communicated with radial holes of the body and channels of supply and discharge of working fluid in the lever of the blade lifting mechanism and axial channels for transfer of working fluid from the lever of the blade lifting mechanism to the blade frame. At the same time the specified axial channels are closed with plugs with seals at the end side of the core and are pressed with a flange on bolts. Connection of the body with the blade frame is carried out by means of a threaded element screwed into the blade frame and stretching via the central axial hole installed into a cut slot of the leash element, a stop made in the form of a four-face rod with a base in the form of a square, with a support site perpendicular to its faces. Between the leash element and the stop in the radial direction there is a gap, the value of which is more than the total value of gaps between the outer surface of the core and inner surfaces of the blade frame eyes. Height from the surface joined with the blade frame to the support site of the stop is more than the thickness of the leash element, and the width of the stop is less than the width of the slot of the leash element.
EFFECT: increased operational resource of a collector due to elimination of direct transfer of loads from a movable part of a machine towards a fixed one.
SUBSTANCE: working mechanism comprises basic mechanism, cab and cab manipulator articulated with basic mechanism designed to change the cab position relative to said basic mechanism. Note here that cab manipulator is equipped with at least one hydraulic actuator to turn the cab about horizontal axis relative to basic mechanism. Note here that said cab id coupled with said manipulator to allow the turns actuated by tilt control hydraulic drive. Besides, said working mechanism includes the cab emergent exit system incorporating one emergent tilt valve for cab tilt adjustment device designed to orient the cab in normal position in emergent exit.
EFFECT: reliable escape of engineman cab.
9 cl, 3 dwg
SUBSTANCE: device to control lifting-digging mechanisms comprises a compressor, an oil and moisture separator and a receiver, pneumatically serially connected to each other. At the same time the outlet of the receiver is pneumatically connected to inlets of adsorbers with evenly distributed heaters, and outlets of adsorbers are pneumatically connected to a load. The compressor is equipped with a suction filter, comprising a casing with a conical bottom, a nozzle of cleaned air exhaust, a condensate extractor, installed in the bottom hole, a reflecting partition and a nozzle of cleaned air supply. The filter casing is made in the form of a double-layer jacket with an air cavity connected by the nozzle of heating regenerated air supply by means of a pipeline and a control valve with adsorbers by a nozzle of heating regenerated air discharge into atmosphere. Evenly distributed heaters in adsorbers are separated by partitions from adsorbent grains. At the same time each of the partitions is made of a bimetal. Besides, the material of the bimetal at the side of the heater has a conductivity ratio that is 2.0-2.5 times higher than the material at the side of adsorbent grains.
EFFECT: maintenance of efficient operation during long-term operation of a control device of lifting-digging mechanisms, by provision of specified quality of compressed air drying due to elimination of thermal damage of adsorbent grains.
SUBSTANCE: fluid-controlled slide valve is arranged between load mechanism hydraulic cylinder rod end and pressure valve inlet line. Control chamber of said valve is communicated with front shutter drive hydraulic cylinder chamber for it to be closed.
EFFECT: independent operation of hydraulic cylinders.
SUBSTANCE: device to control lifting-digging mechanisms comprises a compressor, an oil separator and a receiver, which are pneumatically connected to each other in series. The outlet of the receiver is pneumatically connected to inputs of adsorbers with evenly distributed heaters, and outlets of adsorbers are pneumatically connected to a consumer. The compressor is equipped with a suction filter. The filter is made in the form of a double-layer jacket with an air cavity, connected by a nozzle of input of heating regenerated air. Adsorbers are equipped with a thermoelectric generator comprising a through channel for regenerated air and a through channel for dried compressed air, inside of which there are accordingly hot and cold ends of a set of differential thermocouples.
EFFECT: reduced power inputs when producing compressed air of specified quality for a device of lifting-digging mechanisms control.
SUBSTANCE: pump-accumulator hydraulic drive to rotate an earth-mover platform comprises a controlled pump, hydraulic distributors, safety and check valves, a hydraulic accumulator, a relay controller, connected to each other by hydraulic manifolds, and a controlled hydromotor. At the same time one of hydraulic distributors is installed between the controlled pump and the controlled hydromotor of platform rotation. Safety valves are valves with two adjustment pressures. The second hydraulic distributor is arranged between the controlled pump and the first hydraulic distributor, serving to change power streams from the controlled hydraulic pump to the hydraulic accumulator.
EFFECT: maximum use of kinetic energy of a rotary platform, reduced wear and lower loads in a mechanism of earth-mover platform rotation, reduced quantity of hydraulic scheme elements.
FIELD: machine building.
SUBSTANCE: proposed device comprises first and second engine openings communication L' and N' for communication with two-way hydraulic motor D, and openings M' and O' for communication with manual-control valve H. Besides, valve device comprises normally-closed proportioning load-adjustment valve E and check valve 12 with outlet communicated with aforesaid second opening N' and inlet communicated with opening O'. Note here that check valve 12 is pre-stressed for opening solely in case its inlet exceeds preset pressure range.
EFFECT: higher reliability.
1 cl, 7 dwg
FIELD: earth-moving facilities; hydraulic drives of scraper working members.
SUBSTANCE: proposed hydraulic drive contains pressure spool installed in parallel with like spaces of two hydraulic cylinders, pressure main line connected between two check valves, free outlet of check valve being connected with inlet of pressure spool and one hydraulic cylinder. Free inlet is connected with outlet of pressure spool and other hydraulic cylinder, drum main line connects opposite spaces of hydraulic cylinders. Hydraulic drive is furnished with two series-connected pressure spools. Inlet of first pressure spool and outlet of second pressure spool are connected with outlet of first hydraulically controlled reversible spool. Their common line is connected with controllable space of second hydraulic cylinder and is separated by check valve from pressure main line. Inlets of first hydraulically controlled reversible spool are connected to outputs of second hydraulically controlled reversible spool and are connected with controllable spaces of first and second hydraulic cylinders. One inlet of second hydraulically controlled reversible spool is connected with inlet of pressure spool and is connected to pressure line through check valve, and second inlet is separated from pressure line by other check valve. Control spaces of two hydraulically controlled reversible spools are united and are connected to pressure main line through two-position spool.
EFFECT: improved efficiency of control of scraper blade system.