针对额定压力80MPa,额定流量8L/min的超高压水液压柱塞泵的密封结构建立了泄漏模型,对其进行了仿真分析,得到密封间隙大小、接触长度、柱塞两端压差等因素对泄漏量的影响。仿真结果表明:该结构在超高压水液压泵中具有良好的密封性能,对泵结构的优化改进具有一定的指导意义,并为后续的试验研究指明了方向。 Aiming at the sealing structure of UHP hydraulic hydraulic piston pump with rated pressure of 80MPa and rated flow rate of 8L / min, a leakage model was established and simulated. The factors such as seal gap size, contact length and pressure drop across the plunger The impact of leakage. The simulation results show that the structure has good sealing performance in the ultra-high pressure hydraulic pump, which is of guiding significance to the optimization and improvement of the pump structure, and points out the direction for the subsequent experimental research.