Abstract

In order to solve the problem that the assumption of the straight shaft is inconsistent with the actual situation of marine water-lubricated journal bearings, the journal bending curve was identified by calculating the three-dimensional mechanical model of propulsion shafting.- A fluid–solid coupling model of water-lubricated journal bearings considering journal bending was proposed. The results show that the simulation values matched the experiment values well at partial sections by a full-circumference film pressure distribution experiment with the full-size bearing. The journal bending line caused the water film pressure to peak at both ends of the bearing and caused the lubrication performance distribution to gather to one side. As eccentricity increases and Young’s modulus of lining decreases, the aggregation phenomenon is aggravated, maximum film pressure and carrying capacity increase, and minimum film thickness and friction coefficient decrease.

摘要

为解决船用水润滑轴颈轴承的直轴假设与实际情况不一致的问题，通过计算推进轴系三维力学模型，识别轴颈弯曲曲线。提出了考虑轴颈弯曲的水润滑轴颈轴承耦合模型。结果表明，通过全尺寸轴承的全圆周油膜压力分布实验，模拟值在部分截面与实验值匹配良好。轴颈弯曲线导致轴承两端的水膜压力达到峰值，导致润滑性能分布向一侧聚集。随着偏心距的增加和衬里杨氏模量的降低，聚集现象加剧，