静压推力轴承各工况下的热油携带及油膜温升特性

Hot Oil Carrying and Oil Film Temperature Rise Characteristics of Hydrostatic Thrust Bearings under Various Operating Conditions

关键词:  静压推力轴承  热油携带因子  有限体积法  油膜  温度场

Key words:  Hydrostatic thrust bearings  Hot oil carrying factor  Finite volume method  Oil film  Temperature field

摘要:

针对静压推力轴承运行过程中油膜温度骤升问题，从轴承摩擦副润滑机理出发，阐述斜面式双矩形油垫静压轴承油膜热油携带现象，定义油膜热油携带因子，建立油膜温升数学模型。采用有限体积法，对外载荷工况0～30t及转速工况4～100r/min进行理论计算及ANSYS-FLUENT软件流体仿真分析，得出油膜温度分布及热油携带发生规律，最后进行油膜实验验证。研究发现，当旋转工作台逆时针工作时，热油携带现象发生在单个油垫右侧封油边区域，且热油携带因子受转速影响较大。模拟得出的油膜温度场呈非对称分布，且随着转速及载荷的增加油膜整体温升逐步增大。研究结论可为工程实际静压轴承可靠运行工况条件确定提供理论参考。

Abstract:

Aiming at the problem of sudden rise of oil film temperature during the operation of hydrostatic thrust bearings， the oil film hot oil carrying phenomenon of the bevel type double rectangular oil pad static pressure bearing was explained from the mechanism of bearing friction pair lubrication， the oil film hot oil carrying factor was defined， and the oil film temperature rise mathematics was established model. Using the finite volume method， the theoretical calculation and ANSYS-FLUENT software fluid simulation analysis of the static pressure thrust bearing under external load conditions of 0~30t and speed conditions of 4~100r/min were carried out， and the oil film temperature distribution and the rules of hot oil carrying were obtained. Finally， the oil film experiment was verified. It is found that when the rotating table works counterclockwise， the hot oil carrying phenomenon occurs in the oil sealing edge area on the right side of a single oil pad， and the hot oil carrying factor is greatly affected by the rotation speed. The simulated temperature field of oil film is asymmetrically distributed， and the overall temperature rise of oil film increases with the increase of rotating speed and load. The conclusion of this study can provide a theoretical reference for the determination of reliable operating conditions of practical hydrostatic bearings.