为完善轴向柱塞泵柱塞副性能分析理论体系,针对温度分布影响柱塞副性能问题进行研究,建立瞬时油膜厚度场、压力场和温度场模型以及柱塞副摩擦与泄漏模型,采用交错网格技术划分油膜网格,采用有限体积法求解能量方程和雷诺方程,以MATLAB仿真软件为依托耦合各物理场模型和柱塞微运动特性,对柱塞副动态温度场进行数值求解.研究温度对油膜压力分布、柱塞副轴向摩擦力和泄漏量的影响,并分析油膜不同入口温度对柱塞副性能参数的影响规律.研究结果表明:温度变化数值计算结果与实验结果基本一致;在柱塞副中引入动态温度后油膜压力峰值明显降低,轴向摩擦力有所下降,但柱塞副泄漏量增加较快;控制油膜入口油温能有效提高柱塞副工作性能.%In order to complete the theoretical system of the performance analysis in piston/cylinder assembly of an axial piston pump, the influence of the temperature behavior on the performance in piston/cylinder assembly was studied. The mathematical model of instantaneous thickness, pressure field and temperature field was established, and the friction and leakage model for the performance analysis was completed. A staggered mesh technology was used to mesh the oil film, the Reynolds Equation and the energy equation were solved with the finite volume method. The micro-motion and each physical field of the piston was coupled in MATLAB, and the dynamic temperature field of the piston/cylinder assembly was calculated numerically. The influence of temperature on pressure distribution, axial friction force and leakage was researched, and the impact of different inlet temperature on performance parameters in piston/cylinder assembly was analyzed. The results show that the numerical results are in agreement with the experiment results. The peak pressure of oil film is weakened obviously, and the axial friction force also decreases, but the leakage increases rapidly after considering the dynamic temperature in piston/cylinder assembly. Therefore, controlling inlet temperature is an effective way of improving working performance of the piston/cylinder assembly.
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