Experimental and Simulative Investigation of a Partially Hydrostatic Relieved Contact in Variable Speed Axial Piston Machines

The lubrication film pressure of certain tribological contacts of hydraulic axial piston machines is generated partly by hydrodynamics and partly by a load-dependent hydrostatic relief. Matching these pressure components is a challenge in the design of tribological contacts with variable relative velocity and variable load. In particular, the operating and wear behavior of the slipper-swashplate-contact in axial piston machines has currently not been fully investigated under these conditions. Thus, in this work, a simulative and experimental investigation of the slipper-swashplate-contact is presented, to identify major factors influencing wear during operating point changes.