Results of analysis of reliability indicators of axial-piston hydraulic machines

Abstract

EN: A detailed analysis of the reliability indicators of axial-piston hydraulic machines shows that a significant share (44%) of all malfunctions is caused by the pumping units of the pump and motor. Judging by the type and nature of wear of parts of the pumping unit, it can be said that they are caused mainly by hydro abrasive and cavitation wear, which are caused by the content of mechanical particles and dissolved air in the working fluid. Under the influence of impurities, high temperature and the presence of air in the working fluid, the acid number changes, and the additives in the fluid are destroyed. The dustiness of the air during the operation of mobile agricultural machines and directly in the area of the hydraulic drive elements is so high that after 50-60 hours of operation of the machine, the contamination of the working fluid exceeds the 10th class, and after 200-300 hours of operation, the contamination is 8-15 times higher than the limit value.