凹槽结构对水润滑微凹槽尾轴承润滑性能的影响  

Lubrication Characteristics of Water Lubricated Stern Tube Bearing with Surface Textured Microgrooves

作　　者：肖静[1] 张圣东[1] 金勇[2] 巩加玉 XIAO Jing;ZHANG Shengdong;JIN Yong;GONG Jiayu(School of Mechanical & Materials Engineering,Jiujiang University,Jiujiang Jiangxi 332005,China;School of Energy and Power Engineering,Wuhan University of Technology,Wuhan Hubei 430063,China)

机构地区：[1]九江学院机械与材料工程学院,江西九江332005 [2]武汉理工大学能源与动力工程学院,湖北武汉430063

出　　处：《润滑与密封》2020年第12期125-129,共5页Lubrication Engineering

基　　金：江西省科技厅重点研发计划一般项目(联合资助)(20192BBEL50028);国家自然科学基金项目(51379168).

摘　　要：为研究仿生表面织构占比和宽度对尾轴承润滑特性的影响,基于柔度矩阵法和润滑理论,计入内衬弹性变形,建立表面微凹槽织构水润滑尾轴承的流固耦合模型,通过试验验证模型的正确性和合理性。设计矩形、圆形、等腰三角形3种不同截面形状的微凹槽表面织构水润滑尾轴承,对比分析凹槽占比和宽度对尾轴承承载力和摩擦性能的影响。结果表明:在同等条件下,局部凹槽尾轴承承载力和摩擦性能显著优于全局凹槽尾轴承;凹槽占比约为0.31时,矩形微凹槽尾轴承承载力达到最大值,摩擦因数达到最小值,因此在设计、使用水润滑尾轴承,尤其是赛龙内衬水润滑尾轴承时,建议凹槽占比取值为0.30~0.32,此时可获得最佳润滑性能;随凹槽宽度的增大,局部矩形凹槽尾轴承润滑效果显著优于等腰三角形和圆形凹槽尾轴承。In order to study the influence of groove ratio and width on the lubrication characteristics of water-lubricated stern tube bearing,based on the flexibility matrix method and lubrication theory,taking into the elastic deformation of the lining,fluid-structure interaction(FSI)model of the water-lubricated stern tube bearing with micro-groove surface texture was established,and the correctness and rationality of the model was verified by experiments.The water-lubricated stern tube bearings with micro-groove surface texture of three kinds of different cross-sectional shapes,such as rectangular,circular and triangular,were designed.The influence of the groove area ratio and width on the bearing capacity and friction performance was analyzed.The results show that under the same conditions,the bearing capacity and friction performance of local groove stern bearing are significantly better than that of global groove stern bearing.When the groove area ratio is about 0.31,the bearing capacity of the rectangle grooved stern tube bearing reaches the maximum value and the friction coefficient reaches the minimum value.When designing and using water lubricated stern tube bearings,especially the thordon water lubricated stern tube bearings with rectangular micro-groove,it is suggested that the ratio of groove should be 0.30 to 0.32 so as to obtain the best lubrication performance.With the increase of micro-groove width,the lubrication effect of water-lubricated stern tube bearing with partial rectangle micro-groove is significantly better than that of stern tube bearings with partial sosceles triangle and circular micro-groove.

关 键 词：表面微凹槽织构 水润滑尾轴承 柔度矩阵法 流固耦合模型 

分 类 号：TH117.1[机械工程—机械设计及理论] U664.21[交通运输工程—船舶及航道工程]