A Study of Water Ring Vacuum Pumps : 3rd Report, Experimental Analysis

Abstract

As the structure of water ring vacuum pump is very complicated, it is very difficult to measure the variation of gas pressure between impellers accurately. This is why the measurement of the variation of gas pressure between impellers has not yet been published in prior studies. Measuring the pressure variation of a gas between impellers is very important in order to understand the characteristics of water ring vacuum pumps. We conducted an experiment to determine how gas is compressed between impellers in a water ring vacuum pump, and to determine the pressure variation of gas from the start of suction to the discharge of a gas. In the previous report, we demonstrated that the sealing water supply has a substantial effect on the characteristics of the water ring vacuum pump. We also analyzed how the sealing water supply affects gas pressure, volumetric efficiency and the quality of the vacuum.