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Pressure Compensation Valves and Load Sensing Systems

A pressure compensation and load-sensing technology, which is applied in fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve problems such as compensation valve fluctuations, poor stability, and large fluctuations in actuators, and achieve stable compensation functions and reduced The effect of small fluctuations

Active Publication Date: 2016-05-04
XCMG CONSTR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the current structure of the pressure compensation valve can balance the load, when there is a large change in the load during the compound action, there will be fluctuations in the compensation valve, resulting in large fluctuations in the actuator and poor stability.

Method used

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  • Pressure Compensation Valves and Load Sensing Systems
  • Pressure Compensation Valves and Load Sensing Systems
  • Pressure Compensation Valves and Load Sensing Systems

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Embodiment Construction

[0021] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0022] Such as figure 2 Shown is a schematic diagram of the hydraulic principle of an embodiment of the pressure compensation valve of the present invention. In this embodiment, the pressure compensating valve includes a valve body, a pressure compensating spool and a one-way valve arranged inside the valve body, and the valve body has an oil inlet chamber P, a pressure control chamber Pc, a load sensing chamber Ls and a load control chamber Lc , the oil inlet chamber P communicates with a control end of the pressure compensation spool through an oil passage with a damping hole, the pressure control chamber Lc and the load control chamber Pc communicate with the oil inlet and oil return port of the check valve respectively, and the load is sensitive The chamber Ls communicates with the other control end of the pressu...

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Abstract

The invention relates to a pressure compensation valve and a load-sensitive system. The pressure compensation valve includes a valve body and a pressure compensation valve core arranged inside the valve body. It also includes a one-way valve. The valve body has an oil inlet chamber, a pressure control chamber, and a load-sensitive system. cavity and load control cavity. The oil inlet cavity is connected to a control end of the pressure compensation valve core through an oil passage with a damping hole. The pressure control cavity and the load control cavity are connected to the oil inlet and return port of the one-way valve respectively. The load sensing chamber is connected to the other control end through an oil passage with a damping hole. The pressure oil input from the oil inlet chamber passes through the pressure compensation valve core and is output from the pressure control chamber. The one-way valve provided between the pressure control chamber and the load control chamber of the present invention can prevent the pressure signal of the high-load working link from being transmitted reversely to the pressure control chamber of the pressure compensation valve on the low-load working link, so that both ends of the pressure compensation valve The pressure difference is stable, ensuring the compensation function of the pressure compensation valve is stable and reducing fluctuations.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a pressure compensation valve and a load sensing system. Background technique [0002] In the current load-sensing system, the pressure compensation valve is usually used to balance the load, so that the pressure difference between the inlet and outlet of all valve stems is equal, so that the speed of the actuator is only related to the stroke of the operating valve stem, and the operator can easily adjust the pressure according to his own wishes. To control its compound action and maintain the independence of each actuator movement. [0003] Existing pressure compensating valves such as figure 1 As shown, usually, one end of the spool communicates with the oil inlet chamber P of the valve body, and the other end communicates with the load feedback pressure oil Ls, and the load balancing function of the pressure compensation valve is to feed back the pressure signal of the w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02
CPCF15B13/026F15B13/0407
Inventor 景军清邢红兵翟海燕李水聪薛源
Owner XCMG CONSTR MACHINERY
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