Squeal noise in hydraulic poppet valves  

作　　者：Da-yun YI Liang LU Jun ZOU Xin FU 

机构地区：[1]The State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2016年第4期317-324,共8页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project supported by the National Natural Science Foundation of China （No. 51475415）, the Science Fund for Creative Research Groups of the National Natural Science Foundation of China （No. 51221004）, and the Fundamental Research Funds for the Central Universities, China

摘　　要：The poppet valve is a fundamental component in fluid power systems. Under particular conditions, annoying ＂squeal＂ noises may be generated in hydraulic poppet valves. In the present study, the frequency spectrum of the squeal noise is obtained by analyzing the sampling data from the accelerometer mounted on the valve body. It is found that the flow velocity, pressure, and structural parameters have crucial effects on the properties of squeal noise, especially frequency. Larger valve chamber volume or lower backpressure leads to lower fundamental frequency of the squeal noise. An explanation for the squeal noise, as a result of Helmholtz resonance, is suggested and proved by experimental results.

关 键 词：Poppet valve Squeal noise Helmholtz resonance Fluid acoustics Shear layer instability 

分 类 号：TH137.52[机械工程—机械制造及自动化]