Study on the Surface Micro-texture of Blades of Continuous Rotary Electro-hydraulic Servo Motor

The performance of a flight simulator turntable, used to simulate the flight status of an aircraft in a laboratory setting, directly affects the accuracy of simulation results. As the driving component of the simulator turntable, the continuous rotary electro-hydraulic servo motor significantly impacts the performance of the turntable. Therefore, this study focuses on optimizing the performance of the continuous rotary electro-hydraulic servo motor, specifically by improving the friction and leakage characteristics of the motor's critical friction pairs through surface texturing technology. Although surface texturing can enhance lubrication and load-carrying capacity, it may also increase oil film leakage, affecting volumetric efficiency. Hence, this paper adopts a multi-objective optimization method for designing non-uniform microtextures, aiming to reduce friction while controlling internal leakage. By performing performance comparison analyses of different microtexture morphologies, various texture models were designed. Mathematical and oil film models were established with the oil film load-carrying capacity and leakage rate as objective functions. The NSGA-II algorithm was employed for multi-objective optimization design, resulting in the optimal non-uniform surface microtexture structures and dimension parameters. Simulation and experimental validations have confirmed the effectiveness of this design method, providing both theoretical and experimental support for the application of surface texturing in the friction pairs of hydraulic components.