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Hydraulic system capable of independently adjusting speed by adopting two pressure compensators

A pressure compensation, hydraulic system technology, applied in the hydraulic field, can solve the problems of easy instability of the system, improper matching of pressure compensator and balance valve parameters, etc., to achieve the effect of achieving stability and enhancing adaptability

Inactive Publication Date: 2013-02-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to take into account the speed regulation performance, it is usually necessary to add a pressure compensator at the inlet to compensate, but the parameters of the pressure compensator and the balance valve are not properly matched, and the system is prone to instability.

Method used

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  • Hydraulic system capable of independently adjusting speed by adopting two pressure compensators
  • Hydraulic system capable of independently adjusting speed by adopting two pressure compensators

Examples

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Effect test

Embodiment 1

[0021] Embodiment 1. A hydraulic system using dual pressure compensators for independent speed regulation, such as figure 1 Said, including oil filter 1, overflow valve 2, quantitative pump 3, pressure compensator I4, pressure compensator II7, proportional reversing valve 5, shuttle valve 6, one-way valve 8 and two-way motor 9.

[0022] The oil inlet A1 of the oil filter 1 is connected to the oil tank, the oil outlet B1 of the oil filter 1 is connected to the oil inlet A2 of the quantitative pump 3, and the oil outlet B2 of the quantitative pump 3 is respectively connected to the oil inlet P1 of the relief valve 2 And the oil inlet A3 of the pressure compensator 4I, and the oil outlet T1 of the relief valve 2 communicate with the oil tank. The oil outlet B3 of the pressure compensator I4 is connected to the oil inlet P2 of the proportional directional valve 5, the oil return port T2 of the proportional directional valve 5 is connected to the oil tank, and the oil outlet A4 of...

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Abstract

The invention discloses a hydraulic system capable of independently adjusting speed by adopting two pressure compensators. The hydraulic system comprises an oil filter (1), an overflow valve (2), a quantification pump (3), a pressure compensator I (4), a pressure compensator II (7), a proportion reversing valve (5), a shuttle valve (6), a unidirectional valve (8) and a bidirectional motor (9), wherein the pressure compensator I (4) is arranged in front of an oil inlet P2 of the proportion reversing valve (5); the pressure compensator II (7) is arranged behind an oil outlet B4 of the proportion reversing valve (5); an oil outlet B3 of the pressure compensator I (4) is communicated with the oil inlet P2 of the proportion reversing valve (5); an oil outlet A4 of the proportion reversing valve (5) is communicated with an oil inlet A5 of the shuttle valve (6) and an oil inlet A8 of the bidirectional motor (9) respectively; and an oil outlet B4 of the proportion reversing valve (5) is communicated with an oil inlet B5 of the shuttle valve (6), an oil inlet A7 of the unidirectional valve (7) and an oil outlet B6 of the pressure compensator II (7).

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to an independent speed-regulating hydraulic system using dual pressure compensators. Background technique [0002] Hydraulic control technology is widely used in the field of construction machinery, such as truck cranes, excavators, etc. The combination of pressure compensator and proportional directional valve to realize the speed control of hydraulic actuator has been well applied. According to the position of the pressure compensator, the pressure compensation scheme is divided into pre-valve pressure compensation and post-valve pressure compensation. Generally, one load in the system corresponds to one pressure compensator. The problem of speed stability control with large inertial negative loads has been around for a long time, especially in the field of truck cranes and hydraulic winches. The solution of setting a counterbalance valve at the port provides back pressure t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/05
Inventor 聂勇胡少鹏
Owner ZHEJIANG UNIV
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