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Hydraulic balanced valve

A hydraulic balance and valve body technology, applied in the field of hydraulic balance valves, can solve problems affecting the response time of the control valve core, affecting the safety and reliability of the whole machine, and low-frequency load vibration, etc., to achieve simple valve body structure and processing technology, and reliable action , The effect of small energy loss

Active Publication Date: 2010-11-24
SHANGHAI LIXIN HYDRAULIC
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing hydraulic balance valve generally has such a shortcoming: when the load is lowered, because the opening of the spool of the hydraulic balance valve is difficult to stabilize at a certain opening size, the load will vibrate at a low frequency, causing the system to be unstable and affecting the overall performance. Machine safety and reliability
[0003] In order to solve this problem, many new balance valves have added damping holes inside to eliminate the low-frequency jitter when the load is lowered. The disadvantage of this method is that it affects the response time of the control spool

Method used

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Embodiment Construction

[0032] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0033] see figure 1 , 2 , a balance valve consisting of a main valve and a pilot valve, the pilot valve is installed on the main valve.

[0034] see image 3 , the front surface and the rear surface of the main valve body 43 are processed with oblique holes A and A1 oil port respectively (such as figure 2 As shown), port B is machined on the bottom surface of the main valve body, and a stepped main valve cavity 45 is machined on the right part of the main valve body 43. The three oil ports A, A1, and B communicate with the main valve cavity 45 respectively . The left part of the main valve body 43 is machined with a pilot valve chamber 44 for installing the control spool of the pilot valve. The pilot valve chamber and the main valve chamber...

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Abstract

The invention relates to a hydraulic balanced valve. The hydraulic balanced valve comprises a main valve and a pilot valve, wherein a push rod base is arranged in a pilot valve body main hole of the pilot valve; a radial pore is formed on the push rod base; an axial hole is formed in the push rod base; a first steel ball is placed in the axial hole; a pressure adjusting spring is arranged betweenthe first steel ball and the push rod base; an axial pore is formed on the right end face of the push rod base; one end of a push rod passes through the axial pore and abuts against the first steel ball, while the other end is inserted into a blind hole on the left end face of a control valve core; the control valve core is arranged in a valve body of the main valve; and an ejector rod at the right end of the control valve core is extended into a main valve core to be opposite to a pilot valve core. The hydraulic balanced valve has the advantage of adjusting the response time of the control valve core so as to change the opening speed of a main valve port, effectively control the flowing amount of hydraulic oil and avoid the shaking phenomenon of a descending heavy object when a hanging arm operates.

Description

technical field [0001] The invention relates to a valve assembly for a hydraulic device, in particular to a hydraulic balance valve capable of keeping a load lowered smoothly. Background technique [0002] In modern engineering machinery, construction machinery and other mechanical equipment, a large number of hydraulic load-bearing systems are used, and the balance valve is the key hydraulic component of this type of system, and its performance directly affects the performance of the whole machine. The existing hydraulic balance valve generally has such a shortcoming: when the load is lowered, because the opening of the spool of the hydraulic balance valve is difficult to stabilize at a certain opening size, the load will vibrate at a low frequency, causing the system to be unstable and affecting the overall performance. Machine safety and reliability. [0003] In order to solve this problem, damping holes are added inside many new balance valves to eliminate the low-frequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 袁才富刘峰伟朱剑根陈长信张坚米根祥沈至伟
Owner SHANGHAI LIXIN HYDRAULIC
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