To improve the wear resistance of axial piston pump slipper pair

the transient thermal-structure coupling model was established based on the slipper/swash plate friction pair. Under the pressure shock condition

the slipper surface temperature

stress and deformation were analyzed. The results show that slipper temperature in a piston pump periodically changes with the piston chamber pressure and the range of slipper temperature from 45.5℃ to 49.8℃. The highest slipper temperature appears in the pump suction-discharge pressure transition zone. When the slipper runs in discharge pressure zone of pump

the maximum axial stress is 250MPa

which is concentrated on the edge region between slipper pocket and sealing belt. The layed axial stress of slipper is significant

causing the slipper deformation differentiation. The range of slipper deformation is from 12.5μm to 15μm

which appears at the edge of slipper. Shear force of abrasive particle is enhanced by input heat flux of slipper intensifying micro cutting and extrusion deformation. Furthermore

strip exfoliation and pits are presented by wear surface of slipper

which shows adhesive and abrasive wear characteristics.