基于摩擦配副变形的轴向柱塞泵配流副流固热耦合影响因素分析

Analysis of Influencing Factors of Fluid-solid Thermal Coupling for Axial Piston Pumps Based on Deformation of Frictional Mating Pairs

通过考虑轴向柱塞泵配流盘摩擦配副的缸体和配流盘耦合变形,建立了配流副的热流固多场耦合仿真分析模型。用有限元法求解模型中的柱塞流道压力场和温度场以及配副耦合热变形,其结果能够可视化地实时观测在整泵运动过程中两配副表面不同的温度和变形动态分布过程,从而揭示出多因素对其表面油液润滑特性的影响规律,并指出各因素的影响的权重。结果表明:配流副油液的压力和温度与配副两表面的热弹性变形量的具有耦合交互影响,在轴向柱塞泵的配流副高压压油区,由于压力较大,此区域结构变形和温度分布较大。不同工况条件下,压力和转速的提高,会导致结构的应力变形和温度分布成正相比。压力对变形和温度的影响权重均大于60%,明显大于速度的影响,压力对其起着决定性作用。

This paper establishes a thermo-hydraulic-solid multi-field coupling simulation model of the axial piston pump by considering the coupling deformation of the cylinder and the distributor of the distributor friction pair.The results can visualize the different temperature and deformation dynamic distribution processes of the two mating surfaces during the motion of the whole pump,thus revealing the influence law of multiple factors on their surface oil lubrication characteristics and pointing out the weights of the influence of each factor.The results show that:the pressure and temperature of the mating sub-fluid and the thermoelastic deformation of the two surfaces of the mating sub-fluid have a coupling interaction effect,in the high-pressure pressure area of the mating sub-fluid of the axial piston pump,due to the higher pressure,the structural deformation and temperature distribution in this area is larger.The increase of pressure and speed under different working conditions leads to a positive comparison of the stress-deformation and temperature distribution of the structure.The weight of pressure on both deformation and temperature is greater than 60%,which is significantly greater than the effect of speed,for which pressure plays a decisive role.