伯努利效应引起滑阀阀芯径向力的研究  

Research on Radial Forces for Hydraulic Slide Valves Caused by Bernoulli Effect

作　　者：陆倩倩[1,2] 阮健[1] 李胜[1] LU Qianqian;RUAN Jian;LI Sheng(Key Laboratory of Special Purpose Equipment and Advanced Processing Technology,Ministry of Education,Zhejiang University of Technology,Hangzhou,310014;School of Engineering,Zhejiang University City College,Hangzhou,310015)

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部重点实验室,杭州310014 [2]浙江大学城市学院工程分院,杭州310015

出　　处：《中国机械工程》2017年第19期2332-2338,共7页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51375445);浙江省自然科学基金资助项目(LZ13E050002)

摘　　要：运用CFD软件Fluent对液压滑阀内部流场进行可视化分析,详细研究了阀芯受径向压力分布情况和影响因素。计算发现,径向压力分布与阀口开度、入口流量、环割槽深径比、进出口油道的轴交角都有密切的关系。阀口开度越大,径向压力波动越小;入口流量越大,环割槽深径比越小,径向压力波动越大;与进出口轴交角为0°和90°相比,进出口轴交角为180°时x=0截面的径向压力分布更平稳。同时,通过伯努利效应对入口中心截面处阀芯周向压力分布及阀芯轴向分段建立压力方程,通过理论分析验证了仿真模型和结果的可靠性。最后分析了径向力不平衡产生的卡紧力及径向稳态液动力的分布及其影响因素。To analyze the radial pressure distributions and influence factors of hydraulic slide valves,a visualized model of valve internal fluids was established by CFD software Fluent.The calculations show the distribution has close relationships with the sizes of notch,flows of entrance,aspects ratio of groove cut and the angles of input and output oil passages.The larger the size of notch is the larger fluctuate of radial pressure will be.The larger the flow of entrance is the smaller aspect ratio of groove cut and the larger fluctuate will be.The distribution become more stable under the180°angle of input and output oil passages rather than the situation of0°and90°at x=0section.Meanwhile,the circumferential pressure functions and distribution of inlet middle section and axial pressure functions were established by segmentation according to Bernoulli effect to verify the reliability of the simulation model and results.Finally,the influencing factors and distribution of clamping forces caused by the unbalances of radial pressures and radial steady state fluid forces were analyzed.

关 键 词：计算流体动力学 液压滑阀 径向压力 伯努利效应 

分 类 号：TH137[机械工程—机械制造及自动化]