上海交通大学学报

上海交通大学学报（自然版）

• 机械工程 • 上一篇    下一篇

具有对称不均等负重合量的气动伺服阀特性

訚耀保1，李长明1，荒木献次2   

  1. (1. 同济大学 机械工程学院， 上海 200092； 2. 日本国立玉大学工学部， 日本玉 3388570)
  • 收稿日期:2009-07-16 修回日期:1900-01-01 出版日期:2010-04-29 发布日期:2010-04-29

Characteristics of the Pneumatic Servovalve with Symmetric Uneven Underlaps

YIN Yaobao1,LI Changming1,ARAKI Kenji2   

  1. (1. College of Mechanical Engineering, Tongji University, Shanghai 200092, China；2. Saitama University, Saitama 3388570, Japan)
  • Received:2009-07-16 Revised:1900-01-01 Online:2010-04-29 Published:2010-04-29

摘要： 分析了具有负重合量的气动伺服阀特性及各节流口的流动形式.理论分析和实验结果表明：具有均等负重合量的气动伺服阀的零位压力约为供气压力的80%；当供气侧对称不均等负重合量小于排气侧负重合量时，零位压力小于供气压力的80%；当供气侧对称不均等负重合量大于排气侧负重合量时，零位压力大于供气压力的80%；具有对称均等负重合量或对称不均等负重合量的伺服阀的最大泄漏量发生在零位附近.

关键词: 气动, 伺服阀, 不均等负重合量, 圆柱滑阀

Abstract: A pneumatic servovalve with even underlaps or uneven underlaps and its characteristics of control orifices were discussed. The pressure of the steadystate working point at x=0 is as much as 80% of the supply pressure for a servovalve with symmetric and even underlaps of the spool valve. But it is less than 80% of the supply pressure for a servovalve with symmetric but uneven underlaps where the underlaps of upstream is less than that of downstream. And it is larger than 80% of the supply pressure for a servovalve with symmetric but uneven underlaps where the underlaps of upstream is larger than that of downstream. Either a pneumatic servovalve with symmetric and even underlaps, or a pneumatic servovalve with symmetric and uneven underlaps has maximal leakage flow rate on neutral position of the spool valve. The theoretical results are in good agreement with the experimental results.

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