吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (1): 129-136.doi: 10.13229/j.cnki.jdxbgxb201701019

• 论文 • 上一篇    下一篇

先导阀前腔串加阻尼孔的新型双级溢流阀特性

訚耀保1, 原佳阳1, 傅俊勇2   

  1. 1.同济大学 机械与能源工程学院,上海 200092;
    2.上海航天控制技术研究所,上海 201109
  • 收稿日期:2015-08-24 出版日期:2017-01-20 发布日期:2017-01-20
  • 作者简介:訚耀保(1965-),男,教授,博士生导师.研究方向:极限环境下的液压与气动基础理论,飞行器能源与舵机,高速气动控制.E-mail:y-yin@tongji.edu.cn
  • 基金资助:
    国家自然科学基金项目(51175378,51275356); 航空科学基金项目(20120738001,20128038003).

Characteristics of two-stage relief valve with series damping orifice in the front chamber of pilot valve

YIN Yao-bao1, YUAN Jia-yang1, FU Jun-yong2   

  1. 1.School of Mechanical Engineering, Tongji University, Shanghai 200092, China;
    2.Shanghai Aerospace Control Technology Institute, Shanghai 201109, China
  • Received:2015-08-24 Online:2017-01-20 Published:2017-01-20

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摘要： 针对普通集成式双级溢流阀在空间尺寸限制时不能稳定溢流的问题,建立了普通集成式双级溢流阀框图,得到了先导阀稳定性判据。该判据表明集成式双级溢流阀主阀尺寸与先导阀存在匹配关系:过大的先导阀芯或过小的主阀尺寸将导致先导阀失稳,造成双级溢流阀无法稳定工作。提出了在先导阀前腔串加阻尼孔来实现极端小尺寸下先导阀与主阀稳定控制的新型集成式双级溢流阀方案,该串联阻尼孔避免了先导输入流量对先导阀芯运动的直接影响,通过阻尼作用降低了先导阀回路的开环增益。理论和试验结果表明:该新型溢流阀在极限小尺寸下可以稳定溢流,能提供更好的压力流量特性。

关键词: 仪器仪表技术, 液压, 极端小尺寸, 集成式双级溢流阀, 稳定性, 阻尼孔

Abstract: The ordinary integral two-stage relief valve can not work steadily when its dimension is limited. To solve this problem, a mathematical model of two-stage relief valve is established and the stability criterion of the pilot valve is obtained. The criterion indicates that there is a matching relationship between the main valve size and the pilot valve size in integral two-stage relief valve. If the main valve size is too large or the pilot valve size is too small, the pilot valve will become unstable. A new type two-stage relief valve with a series damping orifice in the front chamber of pilot valve is proposed to achieve stable control of the pilot valve and main valve without increasing the volume of the relief valve. This damping orifice can avoid direct impact on the pilot valve core from the pilot input flow, and decrease the open loop gain of the pilot valve loop. Theoretical and experimental results show that the new type two-stage relief valve can work steadily and has a better pressure-flow characteristic with the extreme small size.

Key words: technology of instrument and meter, hydraulics, extreme small size, integral two-stage relief valve, stability, damping orifice

中图分类号: 

  • TH137.52
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