Hydraulic system launchers

 

The hydraulic system is designed for the launcher. Hydraulic system the launcher contains a pumping station, check valve, three position four way distributor, hydraulic accumulator and the actuator opening covers, while the hydraulic system is equipped with a differential cylinder, from small piston connected to pressure hydroline behind the check valve, and from the side of the large piston between the check valve and the hydraulic pump, while the ratio of the areas of the pistons moves the large piston from the pressure developed by the pump station is less than the maximum discharge pressure, and the volume of the differential cylinder from the side of the large piston - kit motor pump stations rated speed for the period of time required for its completion. The technical result is increased reliability. 1 Il.

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

Known for selected is here, 1978, page 258, Fig.122) hydraulic system pump discharge to the retaining supply lines established pressure containing hydraulic pump, check valve, pressure relief valve, a hydropneumatic accumulator installed in the pressure supply lines after the check valve in front of an on / off valve that is connected to the pressure and drain hydrologically and cavities of the cylinder.

When reaching into this gidrosisteme pressure corresponding to the setting of the safety valve, it opens and connects the pressure hydrological with tank, thereby unload the pump from high pressure. During unloading of the hydraulic pump check valve blocks the pressure hydrological from the drain, and the pressure in the pressure hydrological after the check valve is supported by a hydraulic accumulator.

After turning off the motor of the pumping station pressure in the pressure supply lines, due to small leaks, which are always present in hydraulic systems, falls, resulting in actuation of the safety valve, which separates the pressure hydrological with tank, so when you re-start the pump as the fluid is incompressible, then turning hydro the highway. The rest of the hydraulic system mainly operates in the idle mode (discharge mode of the pump and therefore to rotate the shaft of the pump after run pump station small enough time. Given that in asynchronous motors, usually used in pumping stations to drive a hydraulic pump, the created time for short operation mode (10 min, 30 min, 60 min) and, moreover, the maximum peak torque is considerably larger (more than 2 times) than the starting point (see, for example, asynchronous motors series DM 132-180 and their modifications, technical conditions TU 16-513.363-74), the rotation of the hydraulic pump hydraulic launchers in the discharge mode of the hydraulic pump (long time) and in the load mode (in the process of opening lids) can be applied to the motor of small capacity.

The disadvantages of such a hydraulic system should be attributed that to ensure you start pumping station is necessary to apply higher power motors, and hence the large size and weight.

The task of the invention is to reduce power and weight characteristics of the motor of the pumping station by reducing its load asanoi above is upon starting the motor of the pumping station to set them rated speed necessary reduced starting torque by reducing the load.

The technical result is achieved in that the hydraulic system is introduced differential cylinder, from small piston connected together with the hydraulic accumulator to the pressure hydrological behind the check valve, and from the side of the large piston between the check valve and the hydraulic pump, while the ratio of the areas of the pistons provides movement of the larger piston from the pressure developed by the hydraulic pump, and the volume of the differential cylinder from the side of the large piston kit motor pump stations rated speed for the period of time required to fill the cylinder.

The essence of the proposed hydraulic system of the launcher shown in the drawing.

The hydraulic system comprises a pump station 1, consisting of a variable capacity hydraulic pump 2 and motor 3, the check valve 4, the tank 5, the valve 6, the three-position four way distributor 7, the actuator opening covers launcher 8 and the differential hydraulic cylinder 9. Differential the side of the large piston 12 - between the check valve 4 and the hydraulic pump 2. In the pressure supply lines 11 and the check valve 4 is connected to the hydraulic accumulator 13.

The hydraulic system operates as follows. When switching on the electric motor 3 pump station 1 pump 2 starts to rotate and the liquid is pumped to them, creates a pressure in the pressure supply lines 11 and hydraulic cavity hydraulic accumulator 13. When one of the electromagnets three position four way valve 7, the fluid is directed into the cavity of the actuator 8 for opening covers launcher, when another is in the cavity for closing covers. After turning off the electric motor 3 pump station 1 in the pressure supply lines 11 in the hydraulic cavity hydraulic accumulator 13 remains pressure, which moves a small piston 10 together with large piston 12 of the differential cylinder 9. The pressure in the cavity of the differential cylinder 9 for the small piston 10 is not more than the discharge pressure.

Now when you start pumping station 1 fluid from the hydraulic pump 2 first enters the cavity of the differential cylinder 9 under the large piston 12, since the check valve 4 is closed by the pressure of the OS, the differential cylinder 9 are selected in such a way to move the large piston 12 of the hydraulic pump 2 is necessary to create a pressure significantly lower maximum discharge pressure. So when you start pumping station motor 3, you must create a starting torque for rotation of the hydraulic pump 2 is significantly less than what would be required if the fluid from the hydraulic pump came directly to the pressure hydrological under pressure, and not in the cavity of the differential cylinder 9 under the large piston 12. The volume of the cylinder from the side of the large piston 12 is selected so that the time required for filling liquid, the motor 3 is gaining rated speed. The hydraulic accumulator 13 provides movement of the differential piston of the hydraulic cylinder 9 after stopping of the motor 3 pump station 1 and, thus, prepares the hydraulic system to run.

The proposed hydraulic system launchers made at the Federal state unitary enterprise "design Bureau of machine building" and passed factory tests with positive results.

Claims

Hydraulic system launchers containing a pumping station, check valve, Tr is different, however, that the hydraulic system is equipped with a differential cylinder, from small piston connected to pressure hydroline behind the check valve, and from the side of the large piston between the check valve and the hydraulic pump, while the ratio of the areas of the pistons moves the large piston from the pressure developed by the pump station is less than the maximum discharge pressure, and the volume of the differential cylinder from the side of the large piston - kit motor pump stations rated speed for the period of time required for its completion.



 

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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.

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EFFECT: enhanced reliability and increased longevity.

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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.

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FIELD: transport engineering.

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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.

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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.

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