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Chen Yize
Wang Xuanyin
Xu Zhipeng
Tao Guoliang
State Key Laboratory of Fluid Power
Transmission and Control,
Zhejiang University,
Hangzhou 310027, China |
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Pilot Leakage's
influences on the performances of extra high pressure
Proportional Pneumatic Valve*
Abstract: A mathematic model is built up to analyze the influences of a pilot valve’s leakage on the performances of pneumatic pressure proportional valve, and the performances are simulated by using MATLAB. The results indicate that using slide pilot valve in the valve system is feasible, but the leakage’s influences can not be neglected, especially it may induce instability in a low output pressure situation. A pilot valve using too large throttle window will cause the valve oscillate. To improve the working condition of pilot valve, a method adopting different widths of two throttle window is proposed. According to our simulation, this method balances the pressure drop between the two stage throttle ports, and reduces the influences of pilot valve’s leakage.
Key words:
Pneumatic Proportional valve Mathematic model Leakage simulation |