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根据流体力学有限元理论,采用四节点等参单元,对新型推力轴承轴瓦的力学模型作了进一步的分析和研究;以最佳承载能力范围内摩擦功耗最小为目标函数,计算动压油膜的温度场及轴瓦的热变形对最优参数的影响;建立了各主要参数(油膜厚度、油楔角、承载能力等)与摩擦力矩的关系曲线。将所得的数据和以前研究的论文(未考虑轴瓦的热变形)比较分析,并在可逆式动压推力轴承实验台上作了进一步的实验研究,测量了瓦面的温度场和摩擦力矩。结果证明:理论计算正确,编制的可计算不同工况最优工作参数的程序更符合实际;并建议在实际调整最小油膜厚度时,需增加该值的13%以补偿热变形等结论都有参考价值。
According to the finite element theory of fluid mechanics, the four-node isoparametric unit is used to further analyze and study the mechanical model of the new type thrust bearing bush. The objective function is to minimize the frictional power loss within the optimal load bearing capacity, Temperature field and the thermal deformation of the bearing bush on the optimal parameters. The curves of the main parameters (oil film thickness, oil wedge angle, bearing capacity, etc.) and friction torque were established. The obtained data are compared with the previously studied papers (without considering the thermal deformation of bearing bush), and further experimental research is carried out on the reversible dynamic pressure thrust bearing test bench. The temperature field and friction moment of the bearing face are measured. The results show that the theoretical calculation is correct and the program that can calculate the optimum working parameters of different working conditions is more realistic. It is also suggested that when the minimum thickness of oil film is actually adjusted, 13% of the value needs to be added to compensate the thermal deformation. value.