Cavitation in a spool valve for water hydraulics

29th IAHR Symposium on Hydraulic Machinery and Systems

Okabe, Hitomi^1 ; Tanaka, Yukiko^2 ; Watanabe, Akari^2 ; Yoshida, Futoshi^3 ; Iio, Shouichiro^4 ; Haneda, Yoshiaki^5

Department of Engineering, Graduate School of Science and Technology, Shinshu University, Japan^1

Department of Environmental Science and Technology, Faculty of Engineering, Shinshu University, Japan^2

New Business Department, KYB Corporation, Japan^3

Department of Mechanical Systems Engineering, Faculty of Engineering, Shinshu University, Japan^4

Department of Mechanical Engineering, National Institute of Technology, Nagano, Japan^5

关键词: Acrylic resins;    Cavitation number;    Cavitation phenomenon;    Hydraulic system;    Saturated vapor pressure;    Visualization results;    Water hydraulic systems;    Water hydraulics;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/240/6/062029/pdf
DOI  :  10.1088/1755-1315/240/6/062029

来源: IOP

【 摘 要 】

Cavitation sometimes occurs serious problems in hydraulic system. The problems become especially obvious in water hydraulic system because of higher saturated vapor pressure of water comparing of that of oil. This study is focused on cavitation phenomenon in a spool valve for Aqua Drive System. A spool valve model was made of transparent acrylic resin for visualization of cavitation phenomenon. Vibration and noise from the model were measured with changing the cavitation number. As a result, the vibration and noise are enhanced for the smaller cavitation number and the larger opening gap of a control port. It is, however, noticed that vibration and noise become large for some specific condition regardless of large cavitation number. It is revealed that these phenomena depend on cavitation type from visualization results.