轴向柱塞泵配流副油膜温度特性

Temperature Characteristics of Oil Film in the Port Plate Pair of Axial Piston Pump

柱塞泵配流副油膜温度分布影响配流副油膜润滑、泄漏与摩擦。为了探究轴向柱塞泵配流副油膜的温度分布,搭建了配流副三点油膜厚度与多点温度测试平台。根据采集的配流副油膜三点膜厚试验数据,建立了配流副楔形油膜模型;考虑了柱塞腔、配流副油膜对缸体的静压力、配流副表面微凸体间作用力,建立了缸体轴向力平衡方程;考虑了配流副油膜的能量损失、热传导以及油液黏温特性,建立了配流副油膜热平衡模型。结果表明,配流副油膜最高温度值随着压力和斜盘倾角的增大而增大,最高温度点位置保持在高压腰型槽对称线两侧-20°~20°的区域内;最高温度理论与试验结果的相对误差小于8%。

The film temperature distribution of the port plate pair in piston pump affects the lubrication,leakage,and friction.The test platform was constructed to measure the three-point film thickness and multi-point temperature of the port plate pair.The wedge-shaped oil film model was established according to the three-point film thickness test data.The axial force balance equation of the piston cylinder was derived regarding the static pressures in the piston chambers and in the film on the cylinder,and the force between the micro-convex surfaces of the port plate pair.The film heat balance model was developed considering the energy loss,the heat conduction,and the oil viscosity-temperature characteristics.The results indicate that the film maximum temperature increases with the rise of the loading pressure and the swash plate inclination angle.The maximum temperature point falls in the range of-20°~20°on both sides of the symmetric line of the high-pressure waist groove.The maximum temperature relative error between theoretical and experimental results is less than 8%.