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目的 研究不同季节或地域以及外部降温对水润滑动静压轴承热弹流的影响.方法 选取小孔式水润滑动静压滑动轴承为研究对象,采用考虑了热效应的Reynolds方程对水润滑动静压滑动轴承进行热弹流润滑分析,研究了不同温度边界条件下三种轴瓦材料的水润滑动静压滑动轴承润滑膜的温度变化及其压力膜厚的变化.结果 当轴瓦、轴颈的温度相同且异于润滑剂初始温度(313 K)时,轴瓦、轴颈温度越低,润滑膜的温度越低,在入口区和出口区出现明显的温度变化,轴瓦、轴颈温度越低,润滑膜的膜厚越大,第二压力峰越明显.轴承外部降温,使轴瓦温度(297.35、281.7 K)保持低于润滑膜以及轴颈的初始温度(313 K),轴瓦温度越低,润滑膜的温度越低,入口区以及出口区的温度也发生变化,润滑膜的膜厚增大,第二压力峰增大.对比轴瓦、轴颈温度同时降低和轴瓦温度降低这两种工况,润滑剂温度的变化趋势与压力膜厚的变化趋势相同,但变化幅度不同.结论 由于轴承所处季节或地域不同,轴瓦、轴颈的温度异于润滑剂初始温度,外部环境温度越低,润滑膜的膜厚越大,有利于润滑.通过外部降温的形式使轴瓦保持低温状态,同样可以使润滑膜的膜厚增大,有利于润滑.

The work aims to study the effects of different seasonal or regional and external cooling on thermal elastohydro-dynamic lubrication of water-lubricated hybrid journal bearings. With hole-entry water-lubricated hybrid journal bearing as ob-ject of study, the thermal elastohydrodynamic lubrication of water-lubricated hybrid journal bearings was analyzed using the Reynolds equation which has allowed for thermal effect, so as to study changes in film temperature, film pressure and film thickness of water-lubricated hybrid journal bearings with different bearing bush materials under different temperature boundary conditions. When the temperatures of bearing bush and journal were the same but different from initial temperature of lubricant (313 K). The lower the temperatures of bearing bush and journal were, the lower the lubricating film thickness was, and signifi-cant temperature change was present in inlet and outlet areas, more obvious the second pressure peak was. As a result of external bearing cooling, the temperature of bearing bush (297.35 K、281.7 K) was kept below initial temperature of the lubricant and journal (313 K). The lower the temperature of the bearing bush was, the lower the temperature of the lubricating film was, the temperature in inlet and outlet areas changed as well, the higher the film thickness of the lubricating film was, and the higher the second pressure peak was. By comparing the two working conditions of the temperature decrease of both journal and bearing bush and single bearing bush, variation trends of lubricant temperature, film thickness and pressure were the same, but ampli-tudes of variation were different. As the bearings are in different seasons or regions, temperatures of bearing bush and journal differ from the initial temperature of lubricant. The lower the external ambient temperature is, the higher the film thickness is, which is conducive to lubrication. Bearing bush being kept at a low temperature by external cooling can also make the film thickness increases, which is conducive to lubrication.