Research on the leakage of continuous rotary electro-hydraulic servo motor based on fluid structure interaction analysis

Abstract

Purpose Internal leakage is one of the key factors that influence the super-low speed performance of continuous rotary electro-hydraulic servo motor. Therefore, this paper aims to study the change rule of internal leakage for improving the low speed performance of motor. Design/methodology/approach The mathematical models of internal leakage of continuous rotary electro-hydraulic servo motor were established, and according to the working principle of the motor, the 3D models of internal leakage location were established. Simulation analysis was implemented on the continuous rotary electro-hydraulic servo motor by the finite element analysis software ANSYS based on the fluid-structure interaction theory. Findings The results show the deformation of motor’s key parts and the changing rule of internal leakage. The effect of the leakage to the low speed performance of electro-hydraulic servo motor was analyzed, and at the same time, the motor’s leakage experiment was also conducted to verify the validity of simulation results. Originality/value This paper lays the foundation for improving the low speed performance of motor.

Research on the Finite Time Compound Control of Continuous Rotary Motor Electro-Hydraulic Servo System

“…The continuous rotary electro-hydraulic servo motor represents the core instrument in driving the hydraulic simulation turntable. The interference of oil-source pulsation, friction, leakage and uncertain external factors in the system, makes it difficult to establish an accurate mathematical model [1][2][3], that is unable to meet the control performance requirements of continuous rotary electro-hydraulic servo motor systems. Thus, to enhance electro-hydraulic servo motor performance, it is necessary to establish both a more accurate model of the servo system and a more reasonable controller design that can withstand the poorest of conditions.…”