Numerical simulation and experimental investigation on friction and lubrication behaviors of chevron micro-textured valve plate/cylinder block interface with various area densities

As the critical friction pairs of swashplate-type axial piston pumps, the cylinder block/valve plate lubricating interface is the primary source of friction, wear, and leakage in axial piston pumps. Surface micro-texturing has been widely employed in various manufacturing industries to ameliorate the tribological performance. The influence of chevron micro-texture area density on the tribological behaviors and lubricating properties of cylinder block/valve plate interface is experimentally and numerically researched in the present paper. The chevron micro-textures with various area densities were characterized with scanning electron microscope (SEM) and laser scanning confocal microscope (LSCM). The friction and wear performance of H62 brass/38CrMoAl conjunctions were obtained via disc-on-disc tribological tests to simulate the cylinder block/valve plate lubricating interface. Moreover, the load-carrying capacity of untextured and chevron micro-textured samples were numerically investigated under hydrodynamic lubrication. It was found that the surface with the chevron micro-textured area density of 30.1% displayed the lowest friction coefficient and shallowest wear depth. Although the load carrying capacity of chevron micro-textured samples with the high dimple area density was larger, the severe stress concentration induced by the reduced micro-texture spacing caused the increment and large fluctuations of friction coefficient.

成果名称:低表面能涂层

合作方式:技术开发

联 系 人:周老师

联系电话:13321314106

成果名称:低表面能涂层

合作方式:技术开发

联 系 人:周老师

联系电话:13321314106

成果名称:低表面能涂层

合作方式:技术开发

联 系 人:周老师

联系电话:13321314106

成果名称:低表面能涂层

合作方式:技术开发

联 系 人:周老师

联系电话:13321314106

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