The noise of an Axis Piston Pump respectively with water and oil as the working media: experimental research

Abstract

Generally, water hydraulic piston pump (WHAPP) can use oil as working media due to good lubrication of oil. The noise of pump is a very important performance and paid many attentions. How about the noise of WHAPP when using oil as working media is worth being concerned. In this paper, the noise of a WHAPP with valve plate is experimentally investigated using water and oil as working media respectively. The experimental results show that the volumetric and mechanical efficiency of oil is larger than that of water. However, the noise, vibration and pressure pulsation when using oil are also larger, although the volumetric elastic modulus of water is larger than that of oil. It is analyzed that the pre-compression angle of valve plate for water hydraulic pump is too small for oil pump, which will result in the back-flow and aggravate the noise of oil pump.