上海交通大学学报

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (04): 561-564.

• 建筑科学 • 上一篇    下一篇

一种压力补偿阀的建模及稳定性分析

 贾文华 , 殷晨波   

  1. (南京工业大学 车辆与工程机械研究所， 南京 210009）
  • 收稿日期:2010-03-23 出版日期:2011-04-29 发布日期:2011-04-29

Modeling and Stability Analysis of a Pressure Compensator for Flow-Control Valve

 JIA  Wen-Hua- , YIN  Chen-Bo   

  1. (School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China)
  • Received:2010-03-23 Online:2011-04-29 Published:2011-04-29

摘要： 分析了一种具有负载传感功能的压力补偿阀芯的受力情况.对腔内流体运用动量守恒定理建立数学模型，并利用泰勒级数展开式使其线性化.建立阀芯的运动微分方程，由RouthHurwitz稳定判据给出了稳定条件，并分析了特征参数对阀性能的影响.数值模拟阀腔内流体流动的结果表明：阀腔底部区域的压力可以看作是一个恒定值，而不是位移的函数.集成运用Visual Basic和Matlab分析了压力流量增益系数、动量变化等对稳定性的影响.仿真和实验结果表明，若使液压系统实现全功率平稳控制，则需要合理选用弹簧刚度和合理设计补偿阀口的开口幅度.

关键词: 负载传感, 压力补偿阀, 数学模型, 稳定性

Abstract: The forces acting on the load-sensing compensated valve were illustrated and analyzed, the mathematical model was generated using classical momentum principles, while the linear analysis of this was carried out using the Taylor expansions. The valve motion of the system was described by presenting the equation of motion, the stability condition was given by Routh-Hurwitz stability criterion and the dynamic properties of the compensator were studied. The CFD analysis of the compensator was described to study the effect of the force acting on the bottom of the compensator. The pressure along the bottom wall was noted and its variation was plotted against the geometrical position of the bottom wall that it acted on. Noted that this pressure remain constant along the wall. Then, some plots describe the flow induced forces and coefficients used to understand the stability of the compensator itself.

Key words:  load-sensing, pressure compensator, mathematical model, stability

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