Experimental investigations of the slipper spin in an axial piston pump

Slipper spin has a significant influence on the dynamic behavior and lubrication characteristics of the slipper in an axial piston pump. This paper focuses on experimental investigations on the slipper spin and first introduces a novel test rig for slipper spin measurement. The description of the test method is presented in detail, followed by sample results of the slipper spin measurement. According to the measuring results under test conditions, it is found that the slipper spin is in existence within the pump and its speed is approximately equal to the shaft speed.