Optimization of cross angle based on the pumping dynamics model  

作　　者：Ji-en MA You-tong FANG Bing XU Hua-yong YANG 

机构地区：[1]School of Electrical Engineering,Zhejiang University,Hangzhou 310027,China [2]State Key Lab of Fluid Power Transmission and Control,Zhejiang University,Hangzhou 310027,China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2010年第3期181-190,共10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 Key Technologies Supporting Program of China during the 11th Five-Year Plan Period (Nos. 2006BAF01B01, 2006BAF01B04, and 2007AA03Z211);the National Natural Science Foundation of China (No. 50877070);the Technological Research and Development Programs of the Min-istry of Chinese Railways (No. 2009J006-L)

摘　　要：The single cylinder and multi-cylinder pumping dynamics model of a swash plate piston pump were improved.Particular attention has been paid to the design influences of key parts of the valve plate such as relief groove,pre-compression/ expansion and fluid inertia effect of the unsteady flow.Some important parameters,such as the discharge area,discharge coefficient,fluid bulk modulus,were especially analyzed using numerical methods or by experiment-based estimation.Consequently,the mathematical results of pressure pulsation and flow ripple agree well with experimental results from the test-rig of the flow ripple.Therefore,the cross angle and the pre-compression angle of the valve plate was optimized,based on the pumping dynamics model.Considering both the flow ripple and the cylinder pressure of the pump,the cross angle is set to be 2.2° to 2.7° with a pre-compression angle of 1.7° to 2.2°,so the pumping dynamics character can obtain the best result.The single cylinder and multi-cylinder pumping dynamics model of a swash plate piston pump were improved.Particular attention has been paid to the design influences of key parts of the valve plate such as relief groove,pre-compression/ expansion and fluid inertia effect of the unsteady flow.Some important parameters,such as the discharge area,discharge coefficient,fluid bulk modulus,were especially analyzed using numerical methods or by experiment-based estimation.Consequently,the mathematical results of pressure pulsation and flow ripple agree well with experimental results from the test-rig of the flow ripple.Therefore,the cross angle and the pre-compression angle of the valve plate was optimized,based on the pumping dynamics model.Considering both the flow ripple and the cylinder pressure of the pump,the cross angle is set to be 2.2° to 2.7° with a pre-compression angle of 1.7° to 2.2°,so the pumping dynamics character can obtain the best result.

关 键 词：Flow ripple Pressure pulsation Piston pump Noise 

分 类 号：TH321[机械工程—机械制造及自动化] TV131.2[水利工程—水力学及河流动力学]