计入弹性变形的水润滑轴承润滑性能

Lubrication Performance of Water Lubricated Bearing Considering the Effects of Elastic Deformation

基于有限元软件ANSYS CFX对水润滑滑动轴承进行流固耦合分析,研究空化作用对水润滑滑动轴承水膜的影响,得到了水膜周向和轴向的压力分布以及轴瓦的弹性变形分布,进一步分析了轴瓦材料弹性模量、偏心率、转速对水膜压强分布以及对轴瓦弹性变形的影响规律。结果表明:计入轴瓦的弹性变形后,水膜的最大压强减小,水膜压力分布更加均匀;水膜最大压强随着偏心率、弹性模量、转速的增大而增大,而轴承弹性变形随着偏心率、转速的提高而增大,随着弹性模量的增大而减小;相同条件下,随着弹性模量的增大,水膜发生空化的位置提前。

Fluid-structure coupled analysis of sliding bearing lubricated by water was conducted based on the finite element software ANSYS CFX. The effect of cavitation on the water film of sliding bearing lubricated by water was analyzed,the circumferential and axial pressure distribution of the water filmand the elastic deformation of the bearing bush were obtained. The influence of elasbearing shell material, eccentricity, rotation speed on water film pressure distribution and elasticdeformation of bearing was further analyzed. Taking the elastic deformation of the bearing bush into consideration,the maximum pressure of water film decreases and the pressure distribution of water film becomes more uniform. The maximum pressure of water film increases with the increase of eccentricity, modulus of elasticity and rotational speed, but the elastic deformation of bearing increases with theincrease of eccentricity and rotational speed,and decreases with the increase of modulus of elasticity.Under the same conditions,the cavitation position of water film is advanced with the increase of elasticmodulus.