前置级冲蚀磨损对射流偏转板伺服阀的影响
Hydraulics Pneumatics & Seals（2017）
Abstract
射流偏转板伺服阀前置级油液高速流动时,油液中的颗粒物会对伺服阀前置级产生冲蚀磨损导致伺服阀的性能下降.采用数值仿真的方法对冲蚀磨损前后射流偏转板伺服阀前置级流场进行计算,通过曲线拟合得到两接收孔压差与偏转板位移的关系;将其与射流偏转板伺服阀的AMESim模型结合分析冲蚀磨损前后伺服阀位移及空载流量的变化.结果表明:冲蚀磨损导致射流偏转板伺服阀前置级两接收孔压差减小;在相同的输入条件下射流偏转板伺服阀阀芯位移减小,空载流量降低.
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