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首页> 外文会议>International Conference on Fluid Power Transmission and Control(ICFP' 2005); 20050405-08; Hangzhou(CN) >Improved Performance of Over Centre Valve System Utilizing Negative Flow Force Characteristics
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Improved Performance of Over Centre Valve System Utilizing Negative Flow Force Characteristics

机译：利用负流力特性改善偏心阀系统的性能

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摘要

In this paper the stability problems often encountered in hydraulic systems with over-centre valves and pressure compensated directional control valves are considered. A parameter study carried out in previous work clearly indicates that negative flow forces (forces that try to open the valve rather than close it during operation) at the poppet seat orifice of the over-centre valve seems to reduce the above mentioned stability problems. Subsequently, work has also been done along the lines of shaping the flow force characteristic of the poppet seat orifice by adding a rim to the geometry. The main purpose of this paper has been to add a mathematical analysis combining linearisation and stability analysis, which clearly shows that a beneficial effect can be expected in a wide variety of mobile hydraulic applications.
机译：本文考虑了带有偏心阀和压力补偿方向控制阀的液压系统中经常遇到的稳定性问题。在先前的工作中进行的参数研究清楚地表明，偏心阀的提升阀座孔处的负流力（在操作过程中试图打开而不是关闭阀的力）似乎可以减少上述稳定性问题。随后，还通过在几何形状上增加了一个边沿来完成对提升阀座孔的流动力特性进行整形的工作。本文的主要目的是增加一个将线性化和稳定性分析相结合的数学分析，这清楚地表明了在各种移动液压应用中可以预期获得有益的效果。

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