哈尔滨工业大学学报（英文版）2002，Vol.9Issue(4)：415-418,4.
Flow and cavitation characteristics of water hydraulic poppet valves
Flow and cavitation characteristics of water hydraulic poppet valves
摘要
Abstract
Two types of poppet valves were tested, one is a poppet with a sharp-edged seats, and the other is that with a chamfered seat. During the tests, the effects of backpressure and poppet lift on flow characteristics were considered. Cavitation inception was detected by the appearance and rapid growth of a particular low frequency component of the outlet pressure fluctuation of valve when cavitation occurs. Experimental results show cavitation, back pressure, valve opening and its geometrical shape have significant effects on the flow characteristics of valve. The flow coefficient of throttle with water used as working medium is 0. 85～0. 95 when there is no cavitation. The pressure drop of flow saturation decreases with the increasing of poppet lift. The sharp-edged throttle has stronger anti-cavitation ability than the chamfered one.关键词
water hydraulics/poppet valve/flow coefficient/frequency spectra analysis/cavitation inceptionKey words
water hydraulics/poppet valve/flow coefficient/frequency spectra analysis/cavitation inception分类
机械制造引用本文复制引用
廖义德,刘银水,黄艳,李壮云..Flow and cavitation characteristics of water hydraulic poppet valves[J].哈尔滨工业大学学报（英文版）,2002,9(4):415-418,4.基金项目
Sponsored by the National Natural Science Foundation of China ( Grant No. 59975031 ). （ Grant No. 59975031 ）
