进水温度对水润滑轴承润滑特性的影响

为研究进水温度变化对水润滑轴承润滑特性的影响，采用有限差分法建立水润滑轴承弹流润滑模型，分析不同进水温度和载荷条件下水润滑轴承润滑特性的差异，并且通过试验验证摩擦因数的变化规律。研究发现：随着进水温度升高，轴承的水膜压力下降，但在水膜压力峰区域最大水膜压力升高、最小水膜厚度减小、偏心率增大，表明进水温度升高对润滑性能有着负面影响；在相同的载荷和转速下，轴承摩擦因数随着进水温度升高而下降，且高载荷下进水温度对摩擦因数的影响更大。通过试验发现进水温度越高对摩擦因数变化的影响越大，不同进水温度下载荷越低，载荷的变化对摩擦因数变化量的影响越大。

Influence of Inlet Water Temperature on Lubrication Characteristics of Water Lubricated Bearings

In order to study the influence of inlet water temperature change on the lubrication characteristics of water lubricated bearings,the elastohydrodynamic lubrication model of water lubricated bearings was established by using the finite difference method.The difference of lubrication characteristics of water lubricated bearings under different inlet water temperature and load conditions was analyzed,and the variation law of friction coefficient was verified by experiments.It is found that the water film pressure of bearing decreases with the increase of inlet water temperature,but the maximum water film pressure increases in the water film pressure peak area,the minimum water film thickness decreases and the eccentricity increases,indicating that the inlet water temperature increase has a negative impact on the lubrication performance.At the same load and speed,the bearing friction coefficient decreases with increasing inlet water temperature,and the inlet water temperature has a greater influence on the friction coefficient at high load.Through experiments,it is found that the higher the inlet water temperature,the greater the influence on the change of friction coefficient,and the lower the load at different inlet temperatures,the greater the influence of load changes on the variation of friction coefficient.