单级压力调节阀的阻尼孔射流响应特性分析  

Orifice Jet Response Characters in Pressure Regulating Valve

作　　者：闵为[1,2] 冀宏[1,2] 王峥嵘[1,2] 王金林[1,2] 

机构地区：[1]兰州理工大学能源与动力工程学院,兰州730050 [2]甘肃省液压气动工程技术研究中心,兰州730050

出　　处：《西安交通大学学报》2014年第6期80-85,共6页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(51075194);甘肃省自然科学基金资助项目(1112RJ2A026)

摘　　要：为揭示带阻尼孔的压力调节阀的稳定性机理,运用流固耦合方法计算了阶跃和周期性流量脉动信号激励下阀芯的响应过程,得出了不同阀腔结构条件下阀芯的轴向振动特征和阀口前端阀芯表面压力分布及其变化规律。研究发现,阀内阻尼孔射流流束冲击阀芯表面,使得阀口前端阀芯表面呈现射流冲击区和静压区两部分,阀芯的轴向振动幅值主要取决于射流冲击区和静压区二者液压力的相位差,当静压区和射流冲击区的液压力相位差趋于180°时,阀芯及其轴向振动幅值将大幅减小。研究结果为压力调节阀的设计提供了新思路。To reveal the stability essence of pressure regulating valve with orifice,the response process of a poppet under the action of step and periodic excitation signal was simulated with fluid structure interaction algorithm.The axial vibration character of the poppet,the surface pressure distribution and varying rule of the poppet in front of valve port of different valve chamber structures were analyzed.It is found that the jet shock to the poppet divides poppet surface in front of valve port into jet impingement area and static pressure area,the vibration amplitude of the poppet depends on phase difference of the fluid force in jet impingement area and static pressure area,and is greatly reduced while the phase difference approaches to 180°.

关 键 词：压力调节阀 阻尼孔射流 流固耦合 轴向振动 稳定性机理 

分 类 号：TH137.52[机械工程—机械制造及自动化]