Analysis of internal flow field of a new axial piston hydraulic motor pump

A new type of axial piston hydraulic motor pump is presented,and its structure and characteristics is introduced briefly.The flow field of the axial piston hydraulic motor pump is numerical calculated and analyzed by the use of computational fluid dynamics method.The pressure and velocity distribution of flow field at different speed and rotation angles is analyzed in the paper.The results show that with the rotor speed increased,the pressure of plunger chamber decrease significantly,but the pressure loss is increased,so the rotation speed of the pump should not be too high.Through comparative analysis of the flow field,it can provide an effective reference for optimal design of flow channel.