| As a high-precision equipment for national defense technology,the simulation turntable is generally used for the simulation of aircraft,and the continuous rotary electro-hydraulic servo motor is mainly used to simulate the turntable drive mechanism.In order to improve the dynamic performance and simulation accuracy of the turntable,most domestic and foreign research institutions directly connect the frame of the simulator with the output shaft of the continuous rotary electro-hydraulic servo motor and adopt direct drive.Therefore,the overall performance of the turntable is directly dependent on the continuous rotary electro-hydraulic servo motor itself.The motor seal and vane reversal pressure shock affect the characteristics of the leakage and low speed of the motor.Therefore,the research on combined seal and pressure impact of continuous rotary electro-hydraulic servo motor is of great significance to improve the overall performance of the motor.For the sealing structure of the motor,based on the O-ring rubber superplastic theory,the Mooney-Rivlin model is selected.The structural models of O-ring mounting groove angles of 90°,120°,150°and 180°are established when the O-ring compression ratio is 10%.The combined sealing structures of the continuous rotary electro-hydraulic servo motor are simulated by ABAQUS software.Then the optimal combined sealing structure is obtained by comparing the leakage and viscous friction under four angles.By analyzing the sealing performance of combined sealing of the O-ring compression ratios of 7%,8%,9% and 10%,the optimum compression ratio is obtained.The principle of reducing the pressure shock of the continuous rotary electro-hydraulic servo motor by pre-compression cavity is expounded.According to the actual situation of the continuous rotary electro-hydraulic servo motor,the RNG turbulence model is selected.And the continuous rotary electro-hydraulic servo motor is simulated and analyzed in the long-radius arc region depressurization process and the short-radius arc region boosting process by FLUENT software.Then the optimal structure size and optimal interval of the pre-compressed cavity in the process of boosting and depressurization are determined.It provides a research basis for the optimization of the structure of the pre-compression chamber in the process of reducing the voltage of the motor.A pressure gradient model is established for the pressure reduction process in the long radius arc area of the motor seal chamber.The pressure gradient is used as the objective function,which the blade rotation angle and pre-compression cavity size interval are used as constraints.The fruit fly optimization algorithm optimizes the size of the pre-compressed cavity structure.Finally,the optimal structure size of the pre-compressed cavity is obtained. |
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