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前言电液伺服阀是一种精密的液压元件,它的性能受许多外界因素的影响。这些因素包括:环境状况、工作液的污染程度、电气、液压过载的频率和幅值等。油液污染会腐蚀和磨损节流口的边缘,从而增加伺服阀的内部泄漏,加大零位区域的非线性、减小伺服阀的压力增益,同时也增加滑阀的磨损,使伺服阀的滞环和分辨率增大,更严重的还会堵塞喷嘴和节流孔,使伺服阀失去工作能力。因此,油液污染不仅会降低伺服阀的性能,减少使用寿命,还会造成故障。所以,在使用伺服阀时必须控制油液的污染;设计伺服阀时必须考虑伺服
Introduction Electro-hydraulic servo valve is a precision hydraulic components, its performance is affected by many external factors. These factors include: environmental conditions, the degree of pollution of the working fluid, electrical and hydraulic overload frequency and amplitude. Oil contamination corrodes and abrades the orifice, increasing the internal leakage of the servovalve, increasing the non-linearity of the null region, reducing the pressure gain of the servovalve and increasing the wear of the spool valve, Hysteresis and resolution increase, more serious will plug the nozzle and orifice, the servo valve incapacitated. Therefore, the oil pollution will not only reduce the performance of the servo valve, reduce service life, but also cause failure. Therefore, the use of servo valve must be controlled oil pollution; servo valve must be designed to consider the servo