Abstract: The effects of the inclination angle and wear of the ship stern bearings on the water film pressure have been studied in view of the rapid wear of the water lubricated bearings at the ship stern. Firstly, the water film thickness in the presence of the inclination angle is calculated by using the empirical equation for the bearing wear thickness proposed by Dufrane, which is introduced into the Reynolds equation for the calculation of the water film pressure. The results show that the inclination angle and wear will change the distribution of the water film, especially the wear will make the inlet section of the water film pressure shorter and the pressure bearing region narrower. Under the same load conditions, the maximum water film pressure slowly increases with the increase of the inclination angle. However, it first slowly increases and then rapidly increases with the increase of the wear. The maximum water film pressure increases by seven times when the inclination angle and wear increase to half of the maximum allowable values in the specification. And the position of the maximum water film pressure moves towards to the end with smaller eccentric distance and larger wear, indicating that the wear rate of the damaged end will further increase.

Key words: stern bearing, water-lubricated bearing, inclination angle, wear, water film pressure

摘要： 针对船舶尾部水润滑轴承发生快速磨损的问题,该文研究了船舶尾轴承倾角和磨损的存在对其水膜压力分布的影响。首先根据DUFRANE提出的轴承磨损厚度经验公式计算倾角存在时的水膜厚度分布,并将其引入Reynolds方程中求解水膜压力的计算。结果表明：倾角与磨损的存在会改变水膜分布,特别是磨损的存在使水膜压力入口段变短,承压区域变窄。在相同负荷条件下,最大水膜压力会随着倾角增加连续缓慢增大,而随着磨损增加则先缓慢增大、后快速增大;当倾角与磨损增加到规范最大允许值的一半时,最大水膜压力增加7倍,并且水膜最大压力位置向着偏心距较小、磨损较大的端面偏移,由此预示已磨损端的磨损速率将进一步增加。

关键词: 船舶尾轴承, 水润滑轴承, 倾角, 磨损, 水膜压力