SU1300190A1 - Axial-piston step-controlled hydraulic motor - Google Patents

Abstract

The invention relates to the field of mechanical engineering and mbs is used to drive cranes cargo winches. The aim of the invention is to provide adjustment of the displacement of the motor (GM) in one of the modes depending on the load. The hydraulic cylinder piston (GC) 14 is mechanically connected with the distributor (P) 8, and in the communication line of its working chamber 15 with the on-off slide 12, a hydraulically controlled check valve and non-return valve 19 and 24 are connected in parallel. The control cavity of valve 19 is in communication with the output of valve 9 OR, communicating the inlet and outlet windows of the GM with spool 12. When the GM switches to the accelerated stroke mode, the piston HZ 14 will move P 8 and turn the cylinder block in the direction of decreasing the angle of inclination. The working volume of the GM will decrease, the rotational speed of the shaft will increase, and the pressure will increase in g. Under heavy loads, valve 19 will block the piston of the HZ 14, excluding the switching of the GM to accelerated travel. 3 il. & (L 12 9 17 20 19 15 7 in 6 5 co

Description

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The invention relates to a hydraulic actuator, namely to adjustable axial-piston hydraulic machines, and can be used to drive cranes cargo winches,

The purpose of the invention is to expand the functionality by allowing the adjustment of the working volume of the hydraulic screw in one of the modes depending on the load.

Figure 1 shows the hydraulic motor, a longitudinal section; figure 2 - valve and adjacent parts, the cross-section; in fig. 3 - hydraulic circuit of the hydraulic motor.

The axial-piston step-adjustable hydraulic motor consists of housing 1, shaft 2 mounted on a bearing support and connected through flange 3 by connecting rods 4 and pistons 5 with a cylinder block 6 mounted for rotation relative to the housing 7 of the hydraulic motor regulator and resting on two a convex distributor 8 of one of the spherical surfaces in contact with the cylinder block 6, and the other with the housing 7 of the motor controller.

The hydraulic motor regulator contains a logical OR 9 valve connected to the input windows 10 and 11 of the hydraulic motor, a two-way hydraulic spool 12 connected to the output of the logical valve OR 9 and spring-loaded 13, a hydraulic cylinder 14 with two working chambers 15 and 16 connected to the working taps 17 and 18 of the on-off spool 12, hydraulically controlled shut-off valve 19 with the control chamber 20, spring loaded 21. The control chamber 20 is connected through the logic valve OR 9 with the window 10 or P. The piston of the hydraulic cylinder 14 is connected with a pa tsev 22 and 23 via the distributor 8 to the cylinder block 6. Parallel emomu Hydraulic shut-off valve 19, a check valve 24, the guide of the working fluid on-off valve 12 in the hydraulic cylinder 13 Ka measure 15

Hydromtor works as follows.

In the absence of a control signal to the on-off valve 12, it is held in the upper position by the action of the spring 13 and informs

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through the logical valve OR 9, the window 10 with the working chamber 15 of the hydraulic cylinder 14, thereby keeping the cylinder block of the hydraulic motor in the position of maximum inclination angle. Ki; 1; the lighter has a maximum working volume and develops a maximum torque.

In the case of switching the hydraulic motor to the accelerated travel mode, a control signal is supplied to the on-off valve 12, which, compressing the spring 13, moves to the second position and informs the working chamber 16 of the hydraulic cylinder with a window 10, for example, high pressure, and the chamber 15 communicates with the drain. The piston of the hydraulic cylinder 14 moves upwards, moving the valve 8 and turning the cylinder block 6 in the direction of decreasing the angle of the cylinder block 6 "The working volume of the hydraulic piston will decrease, the frequency of rotation of the shaft will increase, and the pressure will increase. So only the pressure reaches the limit value, to which the spring 21 of the shut-off valve 19 is set, the latter switches to the second position.

The chamber of the hydraulic cylinder 14 will be locked and the two of the piston and the cylinder block 6 will stop. The greater the torque on the hydraulic motor shaft, the greater the angle of the cylinder block during an accelerated course of the hydraulic motor. In the case of the maximum load on the shaft 2 of the hydromotor, the shut-off valve 19 switches to the second position in the initial position of the two-position slide valve 12, blocking the piston of the hydraulic cylinder 4 and excluding the switching of the hydraulic motor to accelerated travel under heavy loads.

Claims (1)

Invention Formula Axial-piston step-adjustable hydraulic motor containing a rotating cylinder block with pistons, a distributor with input and output windows of the working fluid, in contact with the cylinder block and mechanically connected with it, an hydraulic cylinder with two working chambers, a piston of which is mechanically connected with the distributor , and two-position hydro-controlled spring-loaded gold. 3130 nickname connecting the working chambers of the hydraulic cylinder with the drain and through the OR valve with the inlet and outlet windows of the working fluid, characterized in that, in order to expand the functional capabilities by providing the possibility of adjusting the working volume of the hydraulic machine in one of the modes It is equipped with a hydraulically controlled back-up and non-return valves connected in parallel to each other and installed in the communication line of one of the working chambers of the hydraulic cylinder with a two-way hydraulically controlled valve, and the hydraulic control chamber of the shut-off valve is connected to the output of the OR valve. 1U ig. 2 13 Editor M.Petrova Compiled by I. Ilyin Tehred L. Serdyukova Order 1133/34 Circulation 575 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 tpue. 3 Corrector m.Sharoshi Subscription