Yin Wenlong, Zhang Jin, Wang Xu, Zhang Qiyao, Li Ying
School of Mechanical Engineering, Yanshan University, Qinhuangdao, 066000, China.
Hebei Provincial Key Laboratory of Heavy Fluid Power Transmission and Control, Yanshan University, Qinhuangdao, 066000, China.
Heliyon. 2024 Sep 2;10(17):e37334. doi: 10.1016/j.heliyon.2024.e37334. eCollection 2024 Sep 15.
The axial piston pump (APP) is being developed towards higher pressure and higher rotational speeds to enhance operational power density. The piston-cylinder friction pair is a critical component of the APP. Due to its lack of self-compensation capability, the leakage of the piston-cylinder friction pair escalates rapidly under increasingly severe wear conditions. An innovative method for predicting the performance degradation and lifespan of APPs based on friction and wear tests has been proposed. This method can effectively predict the performance degradation trends of APPs under different operating conditions. The actual contact force on the piston pair (PP) during operation is determined through dynamic analysis. Friction and wear tests were conducted on 38CrMoAl piston and ZCuPb15Sn8 cylinder materials under various conditions using a testing apparatus. Utilizing friction and wear theory, the volumetric efficiency of APP under various operating conditions was derived as a function of operational time. The reliability of the theoretical analysis was validated through leakage tests on the APP. The results indicate that volumetric efficiency decreases exponentially with increasing working pressure at rated speed. This research provides theoretical guidance and an experimental foundation for the failure prediction of volumetric efficiency degradation in APP.
轴向柱塞泵（APP）正朝着更高压力和更高转速发展，以提高运行功率密度。活塞 - 缸体摩擦副是轴向柱塞泵的关键部件。由于其缺乏自补偿能力，在日益严峻的磨损条件下，活塞 - 缸体摩擦副的泄漏会迅速增加。提出了一种基于摩擦磨损试验预测轴向柱塞泵性能退化和寿命的创新方法。该方法能够有效预测轴向柱塞泵在不同工况下的性能退化趋势。通过动态分析确定了运行过程中活塞副（PP）上的实际接触力。使用测试装置在各种条件下对38CrMoAl活塞和ZCuPb15Sn8缸体材料进行了摩擦磨损试验。利用摩擦磨损理论，得出了轴向柱塞泵在各种工况下的容积效率随运行时间的函数关系。通过对轴向柱塞泵的泄漏试验验证了理论分析的可靠性。结果表明，在额定转速下，容积效率随工作压力的增加呈指数下降。本研究为轴向柱塞泵容积效率退化故障预测提供了理论指导和实验基础。
