Calculation and Analysis of Heat Loss of High-speed Axial Piston Hydraulic Motor Pump

Axial piston hydraulic motor pump is an innovative type of electro-hydraulic integrated power unit which combines the structure and principle of axial piston hydraulic pump with high-speed motor. With developmental frontier and application prospects, high-speed motor pump has attracted much attention. However, the heat problem of high speed motor pump is an important obstacle to its design and development. In this paper, the basic structure and the operation principle of high-speed motor pump are initially introduces and the causes and calculation method of heat loss are analyzed. With the finite element method and analytical method, the losses of each part of high-speed permanent magnetic hydraulic pump plunger motor are calculated and the influence of key parameters on the loss are analyzed. This study provides evidence for a further analysis of the temperature field of high-speed motor pump and a reference for the design of high-speed motor pump.