Multi-objective optimization of surface texture for the slipper/swash plate interface in EHA pumps

Well-designed surface textures can improve the tribological properties and the efficiency of the electro-hydrostatic actuator (EHA) pump under high-speed and high-pressure conditions. This study proposes a multi-objective optimization model to obtain the arbitrarily surface textures design of the slipper/swash plate interface for improving the mechanical and volumetric efficiency of the EHA pump. The model is composed of the lubrication film model, the component dynamic model considering the spinning motion, and the multi-objective optimization model. In this way, the arbitrary-shaped surface texture with the best comprehensive effect in the EHA pump is achieved and its positive effects in the EHA pump prototype are verified. Experimental results show a reduction in wear and an improvement in mechanical and volumetric efficiency by 1.4% and 0.8%, respectively, with the textured swash plate compared with the untextured one.

Automated summary

Well-designed surface textures play a significant role in improving the efficiency and reducing wear in EHA pumps. This study proposes a multi-objective optimization model to obtain arbitrarily shaped surface textures at the slipper/swash plate interface, and verifies their positive effects in the EHA pump prototype.