橡胶合金螺旋槽水润滑轴承流体域仿真分析  

Simulation Analysis and Research for Flow Field in Rubber Alloy Water-lubricated Bearing

作　　者：李金明[1] 王家序[1] 肖科[1] 吴松[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030

出　　处：《润滑与密封》2011年第12期26-31,54,共7页Lubrication Engineering

基　　金：国家自然科学基金项目(NSFC50905189);重庆市科技攻关计划项目(CSTC;2011AB3005)

摘　　要：对水润滑轴承内部由于凹槽不同而形成的不同形貌动压流体域进行数值分析。借助ANSYS建模模块的流体自动生成技术,建立不同偏心条件下稳态动压流体域;利用ANSYS CFX专业流体分析软件,对直槽和螺旋槽水润滑轴承动压流体域进行稳态数值仿真,得出偏心率、转速、水膜形貌对流场动压效果的影响;对流体内所产生的漩涡的流速和压力进行理论分析和仿真分析验证,得到不同形貌水槽内部的漩涡强度。结果表明:动压流体域流场压力会随着转速、偏心率的增加而增加,承载力也随之增加;动压流体域内部由于形貌的改变,动压效应不同,沟槽对流体域的影响较为明显,直槽的流体域承载能力较大,螺旋槽的局部压力较大;在沟槽内部出现明显的漩涡效应,有利于泥沙等杂质的流出,螺旋槽的涡流效应要明显高于直槽,对排污更有效。The different types of flow field caused by different grooves in the rubber alloy water-lubricated bearing were simulated. The dynamic pressure flow field of the bearing with different eccentricity was set up based on the automatic generation technology of ANSYS modeling module. The static simulation for flow field of water-lubricated bearing with straight groove and spiral groove was done with ANSYS-CFX. The influence caused by eccentricity, rotate speed, flow feature on dynamic pressure effect was analyzed. The velocity and pressure in the vortex were theoretically analyzed and simulated, and swirling strength in different flow was obtained. The results show that the pressure of the flow field will increase with the increase of rotate speed and eccentricity, so as to the bearing capacity. Dynamic pressure effect will be different because of the change of the shape in fluid. The shape of groove influences the flow field apparently. The bearing capacity is better in straight groove bearing, and the local pressure in spiral groove bearing is higher. There is obvious swirling effect in the inner part of the groove, which is good for discharge of impurity in the water. Swirling strength in spiral groove is higher than in straight groove, thus, the former one is more effective for draining the impurity.

关 键 词：水润滑轴承 动压流体域 CFX 仿真分析 漩涡 

分 类 号：TH132[机械工程—机械制造及自动化]