SU850945A1 - Apparatus for controlling hydraulic engine reverse - Google Patents

Description

(54) DEVICE FOR REVERSE CONTROL

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The invention relates to mechanical engineering and can be used in various machines in which the executive body makes frequent ascents. rotational and reciprocating motion.

A device for controlling the reverse of a hydraulic engine is known, comprising a pump supply controller, in the main cavity of which there is a piston, a reversing valve, a hydraulic engine, a drain and pressure hydraulic lines UJ

A disadvantage of the known device is the throttling of the fluid in the control hydraulic device, a large 15 energy cost from the drive engine to the reverse of the hydraulic engine and, as a consequence, a decrease in the efficiency of the hydraulic transmission.

The purpose of the invention is to increase the efficiency J when reversing the hydraulic engine.

This goal is achieved by the fact that the device is equipped with an on-off hydraulic valve, which is installed in the drain hydraulic valve and is connected by pipeline to the pad controller, and the latter is equipped with an additional chamber with a spring-loaded piston in communication with the main cavity of the regulator

made in the piston of the main cavity of the regulator. .

FIG. 1 shows the scheme of the proposed device; in fig. 2 - two-position hydraulic motor; on .fig. 3 is a hydraulic engine braking diagram.

The device contains a pump 1, made adjustable, flow regulator 2, in the main cavity 3 of which there is a piston 4 with a spring 5, a reversing valve 6, a hydraulic motor 7, a drain and a pressure hydraulic line 8 and 9, an on-off hydraulic valve 10, which is installed in the drain hydraulic line 8 and is connected by pipeline 11 with the feed regulator 2. The feed regulator 2 has an additional chamber 12 with PoI 13 and a spring 14.

Two-way valve 10 includes a housing 15, a movable element 16, the working window 17 and 18,

Curve 19 is the dependence of pressure p in the pressure line from time to time (t) with the reverse of the hydraulic engine. Curve 20 - the dependence of the speed (V) of the hydraulic engine from time (t).

The device works as follows. ..

At steady motion of the hydraulic motor 7, the working fluid flows from the pump 1 through the reversing valve 6 to the hydraulic motor 7. From the hydraulic motor 7 through the two-position hydraulic distributor 10, the liquid is drained. switching on the on-off valve 10, its movable element 16 begins to alternate, while the area of the working pk 17 decreases, and the area of the square. working window 18 is enlarged. Part of the working fluid enters through the hydraulic distributor 10 from the hydraulic engine 7 into the main cavity 3 and the additional chamber 12, as a result of which the fluid pressure in the additional chamber 12 of the feed regulator 2 increases, the piston 13. moves, compressing the spring 14. With further increase of pressure in the main cavity 3 of the regulator 2, the piston 4 begins to move, compressing the spring 5, as a result of which the fluid supply by the pump 1 of the hydraulic engine 7. The hydraulic motor 7 is reduced and smoothly decelerated. After the stop of the hydraulic motor 7, the reversing valve 6 is turned on, the on-off valve 10 moves to the original position and the main 3 and the additional 12 cavities are connected to the drain hydroline 8

Claims (1)

1. Basta TM Hydraulic drive and hydropneumatic automation M., Mashinostroenie, 1972, p. 155, fig. 110. To the controller IOL ft ffot / u pump From the drain I (rig. / cavity tudpodtutomeaa KCffuStfOftyffcfKy H N at