【作者】 吕芳蕊； 饶柱石； 徐俊杰； 陈涛； 黄成江；

【Author】 LV Fang-rui;RAO Zhu-shi;XU Jun-jie;Chen Tao;Huang Cheng-jiang;Institute of Vibration, Shock and Noise, State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University;School of Mechanical and Electrical Engineering, Hohai University;

【机构】 上海交通大学机械系统与振动国家重点实验室振动冲击噪声研究所； 河海大学机电工程学院；

【摘要】 在重载轴承的设计中,设计者常假定轴承的承载力与长度近似成正比,通过增大长径比提高轴承承载力。然而对于船用艉轴承等轴颈易于倾斜的轴承,轴承承载力不再与长径比近似正比,轴承长度的过度增加对承载力的提升作用不明显反而易造成轴颈上翘端碰磨,影响轴承润滑性能。鉴于此,本文对轴颈倾斜下水润滑轴承长径比的有效范围进行分析。首先,通过理论与实验研究了长径比对轴颈倾斜水润滑轴承的影响,结果表明,对于轴颈倾斜的轴承,承载能力的提升量随着长径比的增大而减小。鉴于此,提出了有效长径比的概念,仿真结果表明,超出有效长径比的部分对承载能力的提升作用较小。最后,分析了有效长径比随关键轴承参数的变化规律。上述可为船用水润滑轴承设计计算中长径比的选取提供理论指导和数据支持。更多还原

【Abstract】 In the design of heavy-duty bearings, designers often assume that the load-carrying capacity is approximately proportional to its length, and increase the load-carrying capacity by increasing the aspect ratio. However, for bearings such as marine stern bearings that are prone to be misaligned, the load-carrying capacity is no longer approximately proportional to the aspect ratio. Excessive increase in bearing length does not have a significant effect on improving the load-carrying capacity,but instead can easily cause friction at the upwarped end of the journal, affecting bearing lubrication performance. This paper analyzes the effective range of the aspect ratio of misaligned water-lubricated bearings. Firstly, the influence of aspect ratio on misaligned water-lubricated bearings are researched through theoretical and experimental approach. The results show that for misaligned bearings, the increase in load-carrying capacity decreased with the increase of aspect ratio. In view of this, the concept of effective aspect ratio is proposed. The simulation results show that the bearing part exceeding the effective aspect ratio has little effect on improving the load-carrying capacity. Finally, the relationship of the effective aspect ratio with key bearing parameters is analyzed. The research can provide theoretical guidance and data support for the design of aspect ratio of marine water-lubricated bearings.更多还原