A Study of a Wet Vacuum Pump

Abstract

A similarity law is proposed and verified using a pump operating at several speeds. The work on the liquid by the rotor and the work on the gas by the liquid are theoretically calculated work with the ideal work reveals some of the causes to energy dissipation which characterize the pump. At a low speed and at a high compression ratio, the pump does not operate properly. The mechanism of abnormal operation is explained and the critical condition is measured for pumps with three different types of discharge ports.