The analysis of the performance of a sewage pump in terms of the wear of hydraulic components

Abstract

The paper presents the comparison of the performance of the three-blade centrifugal pump operating in sewage water in the function of time. Two conditions of the analysed pump were investigated: a new one and one after a long period of utilization. The main objects of research were the impeller, due to its enormous wear, and the L–shape wear ring. Three dimensional optical scanning was applied to reflect the real geometrical parameters of the analysed pump. The investigations were conducted by means of numerical simulations and a real test. The achieved results indicate the impact of the wear on the performance curves of middle specific speed sewage pump.