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pressure compensation valve

A pressure compensation and pressure technology, applied in the direction of fluid pressure actuation device, servo motor assembly, mechanical equipment, etc., can solve the problems of high cost, non-existence, changing pressure compensation characteristics, etc., to improve product utilization and simple structure , the effect of low cost

Active Publication Date: 2016-07-27
JIANGSU HENGLI HYDRAULIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compensation characteristics required by some actuators are not the same. Some compensation valves also have the function of a check valve, or they do not have the ability to change the pressure compensation characteristics, or although they have the functions of both a check valve and a change of compensation characteristics, the structure is too complicated and the cost is high. higher

Method used

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Embodiment Construction

[0018] See figure 1 As shown, a pressure compensation valve includes a valve body 1, a valve sleeve 2 fixedly installed on the valve body 1, a slidable valve core 3 arranged in the valve hole 4e on the valve body 1, the valve sleeve 2 and the valve core 3 are arranged in turn with a piston 4 and a return spring 5, the piston 4 is placed on the inner hole of the valve sleeve 2, the return spring 5 is built in the pressure chamber 0c formed between the piston 4 and the valve sleeve 2, and a part of the piston 4 The cross-sectional end face acts and places a one-way valve 6 that can only flow to the LS channel 7 in one direction in the oil inlet chamber 4a of the valve body 1. The valve core 3 is connected to establish and block the oil inlet chamber 4a and the oil outlet chamber 4d . The upper end surface A3 of the spool and the lower end surface A4 of the spool are equal to the cross-sections of the upper end surface A1 of the piston and the lower end surface A2 of the piston,...

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Abstract

The invention discloses a pressure compensation valve, which comprises a valve body, a valve sleeve fixedly installed on the valve body, and a slidable valve core arranged in a valve hole on the valve body. The valve sleeve and the valve core are sequentially provided with pistons. And the return spring, the piston is placed on the inner hole of the valve sleeve, the return spring is built in the pressure chamber formed between the piston and the valve sleeve, acts on a cross-sectional end surface of the piston and acts on the oil inlet volume of the valve body A one-way valve that can only flow to the LS channel in one direction is placed in the chamber, and the valve core is connected to establish and block the oil inlet chamber and the oil outlet chamber. The pressure compensation valve of the present invention changes the pressure compensation characteristics, that is, changes the pressure of the piston Effective surface A1, if the pressure effective surface A1 is increased, the force of pushing the piston will increase in terms of blocking, and the pressure in the oil inlet chamber will become larger, making it difficult for the pressurized liquid to flow. The small effective surface A1 facilitates the flow of the pressurized liquid. The structure is simple, the cost is low, and the utilization rate of the product is improved.

Description

technical field [0001] The present invention relates to a pressure compensating valve for use in a hydraulic circuit for distributing, by flow rate, the discharge pressurized fluid of one or more hydraulic pumps in a construction machine for a pressure compensating supply of a plurality of brakes valve. Background technique [0002] Supplying pressurized fluid to a certain discharge of a hydraulic pump like many brakes can be done as follows, configuring multiple hydraulic directional valves in the hydraulic pump discharge path, and supplying pressurized fluid to each actuator by switching the hydraulic directional valves . In this simultaneous supply of pressurized fluid to multiple actuators, the fluid will preferentially go to the actuator with the lower load pressure and thus reduce or stop the supply to the actuator with the higher load. [0003] The hydraulic circuit to solve this problem is to configure a pressure compensation valve between the hydraulic reversing v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02
Inventor 汪立平袁才富卢强陈展刘红光
Owner JIANGSU HENGLI HYDRAULIC TECH CO LTD