轴向柱塞泵滑靴副传热特征

为了揭示轴向柱塞泵滑靴底面油膜温度场分布规律,分析了滑靴副生热机理以及热量传递途径,在此基础上利用热流量守恒定律建立滑靴副热力学耦合模型,讨论不同压力和转速工况下滑靴的结构参数对滑靴底面油膜温度的影响。分析结果表明,滑靴副油膜温度场呈不均匀分布,沿滑靴半径方向呈递减趋势,其最大值出现在最薄油膜厚度区域,容易引起滑靴偏磨磨损,主要集中在泵的排油区;恒压高速工况下滑靴内外半径比范围为1.5~2.0 之间,应尽量取较小值,降低滑靴副油膜温度,提高滑靴副润滑性能;恒转速高压工况下阻尼管长度直径比范围为3.50~8.75之间,应尽量取较小值,防止滑靴底面油膜温度过高,改善柱塞泵的散热效果。

Heat transfer characteristics of axial piston pump slipper pair

To explore the distribution law of oil film temperature field at slipper pair for axial piston pump, a thermodynamic model of slipper pair was built through the conservation law of heat flux after analyzing its transfer mechanism in detail. The effects of slipper structure parameters on film temperature under different piston chamber pressure and shaft rotational speeds were discussed. The results show that the film temperature distribution is non-uniform and show decreasing tendency along slipper radius. The maximum film temperature takes place in the slipper region where oil film thickness is thinnest. The phenomenon occurs mainly in discharge stroke, and causes slipper partial abrasion. When the slipper radius ratio is set from 1.5 to 2.0, the smaller radius ratio is selected to decrease film temperature and improve slipper lubrication performance under high shaft rotational speed. When the orifice length diameter ratio is set from 3.50 to 8.75, the lower orifice length diameter ratio is useful to decrease film temperature and improve the cooling effect of pump.