SU1497395A1 - Hydraulic system - Google Patents

Abstract

The invention can be used in hydraulic systems of road building machines and mechanisms. The purpose of the invention is to increase the reliability of the system by reducing the dynamic loads. The pressure source 1 is connected via a hydraulically controlled valve (P) 2 with a hydraulic motor (H) 3 arrows and through R 4 with a D 5 working body. The control unit 11 P 2 is designed as a pressure line 12 connected through control valves 13, 14 to lines 15, 16 P 2 and through a reducing valve 17 to a source 1. Pressure valve 19 is made with a hydraulic setting, the setting line 20 of which connected to G 5 through a hydraulic time relay 21. 1 il.

Description

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The invention relates to hydraulic actuators 1 of hand-lifting mechanisms and can be used in hydraulic systems of road-building machines and mechanisms.

The purpose of the invention is to increase the reliability of operation and reduce dynamic loads.

The drawing shows a diagram of the hydraulic system of the lifting mechanism.

The hydraulic system of the lifting mechanism contains a pressure source 1 connected through a hydraulically controlled valve 2 to the boom hydraulic motor 3 and through the second valve 4 to the hydraulic motor 5 of the working body 6, which is a gripper 7, and the hydraulic rod 5 is designed as a two-stage hydraulic cylinder with three working cavities 8, 9, 10, control unit 11, made in the form of a pressure line 12 connected through 5

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with cavity 9, and valve 24 provides either unloading of line 20 to discharge, or connection with cavity 9.

The hydraulic system provides either quick activation of the distributor 2 (in the absence or low load in the hydraulic engine 5), or slow activation of the hydraulic distributor 2 in the presence of a load in the hydraulic engine 5, which is more tuned to tapana 23.

Thus, the presence of hydraulic control of the pressure control valve in the control unit reduces the dynamic loads in the actuator.

Claims (1)

Invention Formula A hydraulic system, such as a load-lifting mechanism, contains, and a pressure source connected via hydraulic control valves, control valves 13, 14 with Q lines, a flow control valve with a hydraulic motor. 15, 16 of the control valve 2, with a pressure source 1 through a pressure reducing valve 17 and with a drain 18 through a pressure valve 19 made with hydraulic adjustment, the setting line 20 of which is connected via hydraulic relay 21 to cavity 9 of hydraulic motor 5 and through throttle 2i2 - with a cavity of 8. The hydraulic relay 21 is made in the form of two three-line spring-loaded valves 23, 24, the valve control line 25 is connected to the hydraulic motor 5 cavity 9, and the valve 23 connects the valve control line 26 to either the drain 18 via the throttle 27, or 25 thirty booms and through the second distributor - with the hydraulic motor of the working body, the control unit of the hydraulically controlled distributor, made in the form of a pressure line connected through control valves to the control lines of the hydraulically controlled distributor, and with a pressure source through a pressure reducing valve and equipped with a pressure valve, so that, in order to increase the reliability of work by reducing the dynamic loads, it is equipped with a hydraulic time relay, and the pressure valve is made with hydraulic adjustment, triple hydraulic motor which is connected to the working body through the hydraulic timer. five 0 with cavity 9, and valve 24 provides either unloading of line 20 to discharge, or connection with cavity 9. The hydraulic system provides either quick activation of the distributor 2 (in the absence or low load in the hydraulic engine 5), or slow activation of the hydraulic distributor 2 in the presence of a load in the hydraulic engine 5, which is more tuned to tapana 23. Thus, the presence of hydraulic control of the pressure control valve in the control unit reduces the dynamic loads in the actuator. Invention Formula A hydraulic system, such as a lifting mechanism, contains and a pressure source connected through hydraulic control 5 0 booms and through the second distributor - with the hydraulic motor of the working body, the control unit of the hydraulically controlled distributor, made in the form of a pressure line connected through control valves to the control lines of the hydraulically controlled distributor, and with a pressure source through a pressure reducing valve and equipped with a pressure valve, so that, in order to increase the reliability of work by reducing the dynamic loads, it is equipped with a hydraulic time relay, and the pressure valve is made with hydraulic adjustment, triple hydraulic motor which is connected to the working body through the hydraulic timer.