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Hydraulic drive system and working machine

A drive system, hydraulic technology, applied in the direction of fluid pressure actuation system components, mechanical equipment, fluid pressure actuation devices, etc., can solve the problem of high noise of explosion-proof valves

Active Publication Date: 2022-05-20
SANY HEAVY MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a hydraulic drive system and operating machinery, which are used to solve the problem of high working noise of the explosion-proof valve in the existing hydraulic drive system

Method used

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  • Hydraulic drive system and working machine

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Embodiment Construction

[0049] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0050]In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing this The embodiments and simplified descriptions of the invention do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as...

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Abstract

The invention provides a hydraulic driving system and a working machine. The hydraulic driving system comprises a hydraulic pump, a reversing valve, an anti-explosion valve assembly, a pilot valve assembly, a hydraulic cylinder and an oil tank. One side of the reversing valve is connected with the hydraulic pump and the oil tank, and the other side of the reversing valve is connected with the anti-explosion valve assembly and the hydraulic cylinder. The pilot valve assembly is connected with a control oil way of the reversing valve and a control oil way of the anti-explosion valve. The reversing valve comprises an extension position and a contraction position, and the pilot valve assembly can control the reversing valve to be switched between the extension position and the contraction position; the anti-explosion valve assembly comprises a two-way conduction position, and in the process that the reversing valve is switched between the stretching-out position and the contracting position, the pilot valve assembly controls the anti-explosion valve assembly to be located at the two-way conduction position all the time at the same time. The system can greatly reduce noise caused by frequent opening and closing of the one-way valve in the anti-explosion valve assembly.

Description

technical field [0001] The invention relates to the technical field of hydraulic drive systems, in particular to a hydraulic drive system and an operating machine. Background technique [0002] A hydraulic drive system for driving the action of the actuator is usually arranged in the work machine. For example, an excavator is usually provided with a hydraulic drive system for driving the movement of the boom and stick. In order to avoid the safety problems caused by unexpected situations such as pipeline bursts, it is usually necessary to install explosion-proof valves in the system. In the existing hydraulic drive system, the hydraulic pump usually supplies oil to the oil cylinder through the check valve in the explosion-proof valve. Due to certain fluctuations in the oil pressure in the hydraulic pipeline, the one-way valve in the explosion-proof valve will be frequently opened and closed, which will cause greater noise inside the explosion-proof valve. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/08F15B13/02F15B21/041
CPCF15B11/08F15B13/02F15B21/041
Inventor 刘福乾贾飞王坤龙
Owner SANY HEAVY MACHINERY
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