流场对锥形先导阀稳定性的影响分析  

Analysis on influence of the pilot-valve stability by flow-field

作　　者：吴立桃[1] 彭佑多[1] 李新[1] 颜良 谢伟华[1] 尹喜[1] 彭长清[1] 

机构地区：[1]湖南科技大学机械设备健康维护省重点实验室,湖南湘潭411201 [2]长沙中联重工科技股份有限公司,湖南长沙411011

出　　处：《湖南科技大学学报（自然科学版）》2010年第4期38-42,共5页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：湖南科技大学研究生创新基金资助(S080106)

摘　　要：先导阀节流孔位置精度,阀口圆度误差及导阀出流口位置影响并决定着先导阀流场特性,而先导阀流场是先导阀能否稳定的关键.分析了影响先导阀流场的主要因素,定性描述了流场对先导阀工作稳定性的影响,建立了阀腔内流场的数学模型,利用Fluent软件对先导阀腔内流场进行了仿真,得到了先导阀芯表面漩涡分布和切应力的分布图.通过改变先导阀出流口位置和阀腔节流孔位置偏差,得到先导阀表面应力分布,从而揭示了流场是先导阀稳定工作的关键,为改善先导阀稳定性提供一定理论依据.The flow-field characteristic of pilot-valve was affected and decided by accuracy position of pilot-valve＇s orifice,roundness tolerance of valve port and the position,and flow-field was the key of pilot-valve running stability.The main factors of influencing the flow was analyzed,pilot-valve＇s stability affected by flow was described,and the mathematical modes were established.The contours of shear stress and turbulence kinetic on the face of pilot-valve spool were taken through simulation by Fluent.By changing the location of the pilot valve port and position deviation of flow orifice valve cavity,the pilot-valve＇s surface stress distribution was taken,which reveal flow-field was the key to the pilot-valve running stability,and to provide a theoretical basis for promoting the pilot-valve stability running.

关 键 词：先导阀 稳定性 流场 仿真 

分 类 号：TH137[机械工程—机械制造及自动化]