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Damping valve

A damping valve and valve body technology, applied in the damping valve field, can solve the problem of unsatisfactory buffering of load pressure fluctuations, and achieve the effect of buffering pressure fluctuations

Active Publication Date: 2018-05-01
江苏中尼机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It adds a first damper in the load pressure feedback chamber to buffer the load sensitive pressure fluctuation, but because the damping is too simple, the buffer for the load pressure fluctuation is not ideal, so its structure needs further improvement

Method used

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Embodiment Construction

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, and are not exhaustive of all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts will fall within the protection scope of the present invention.

[0019] Such as figure 1 As shown, a specific embodiment of the damping valve of the present invention is given. In this embodiment, the damping valve of the present invention mainly includes a valve body 3 , a valve core 4 , a spring 2 and a screw sleeve 1 . A port is provided at the lower part of the valve body 3 , and a cavity communicating with the A port is provided inside t...

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Abstract

The invention discloses a damping valve. The damping valve comprises a valve body, a valve core, a spring and a thread sleeve; the lower part of the valve body is provided with an opening A, the upperpart of the thread sleeve is provided with an opening B, and the thread sleeve is in fixed threaded connection with the valve body; the valve core and the spring are arranged in an inner cavity of the thread sleeve, the upper end of the spring abuts against a ladder-shaped place of the inner cavity of the thread sleeve, and the lower end of the spring abuts against the valve core, so that the lower end of the valve core keeps a trend of extending into the opening A, and the lower end of the valve core is in clearance fit with the opening A of the valve body; when oil liquid flows from the opening A to the opening B, the lower end of the valve core can gradually move upwards to reduce the length of clearance fit of the lower end of the valve core and the opening A of the valve body, and the oil liquid in the opening A flows into the opening B through a clearance between the valve core and the opening A of the valve body; and when the oil liquid flows from the opening B into the openingA, the lower end of the valve core completely extends into the opening A, and the oil liquid flows from the opening B into the opening A through the clearance between the valve core and the opening Aof the valve body. The damping valve is simple in machining and can effectively buffer load-sensitive pressure fluctuation.

Description

technical field [0001] The invention relates to the technical field of control valve manufacturing, in particular to a damping valve, in particular to a damping valve used in load-sensitive systems of construction machinery such as wheel loaders, cranes, and small excavators. Background technique [0002] Quantitative load sensing system is widely used in construction machinery such as loaders, truck cranes and small excavators because of its energy saving and low cost. The load-sensing multi-way reversing valve is the core component of this type of load-sensing system, and the quantitative load-sensing system needs to realize the on-demand distribution of actuator flow, and the two-way pressure compensation valve is an indispensable component of this type of hydraulic control system. In actual application conditions, since the load pressure fluctuates from time to time, the opening of the feedback spool will fluctuate, which in turn will cause the actuator to vibrate. [0...

Claims

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Application Information

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IPC IPC(8): F15B13/02
CPCF15B13/026
Inventor 陈艳艳
Owner 江苏中尼机械科技有限公司
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