Vane pumps with cavitation-abrasive wear of their parts

Abstract

The article presents the results of the tests on cavitation-abrasive wear of pumps, depending on their operation modes. And also, in the work, the issues of the appearance of cavitation in hydro abrasive flows, which can lead to rather complex phenomena, which presents difficulties for understanding the essence of the process, are considered. To date, the wear of the working bodies of centrifugal and axial pumps, depending on the mode of their operation, has not been sufficiently studied and a methodology for choosing operating modes that takes into account the wear of their parts has not been developed. Also, the work presents the results of comprehensive laboratory and field studies to research the wear rate of the elements of the flowing part of centrifugal and axial pumps. An alternating pulsating load leads to an increase in the force of interaction of the hydro abrasive flow with the surface of the chamber and increases its wear by 10%, and also reduces the productivity of the pump unit to 9%. It is recommended that the operating modes and the geometric height of the suction of the pumps be selected based on cavitation characteristics constructed from erosion tests.