摘要
以双向流固耦合理论为基础,运用CFD技术对某蓄能机组推力轴承进行数值模拟,研究瓦面位置参数及材料对轴承润滑性能的影响。结果表明,瓦面倾角增大,油膜压力及承载增加,且压力中心区沿镜板旋转方向及瓦面径向外侧偏移;油膜间隙减小,压力及承载均增加。弹性模量减小,轴瓦压力梯度变缓,且压力极值中心向瓦侧边缘移动,因而适当降低轴瓦弹性模量,能够有效减少瓦面高压集中区域,提高轴承使用寿命。
Based on fluid-structure two-way coupling theory, the effects to the beating lubricating properties caused by tile-surface position parameters and materials were studied by using CFD technology to make numerical simulations of a storage unit thrust bearing.The results show that film pressure and load are increased with the increasing of tile-surface in- clination, and the position of central pressure deflects along the outward rotation direction of the mirror plate and the radial direction of tile-surface.The pressure and load are both increased with the decreasing of oil clearance.The pressure gradient of the beating pad is reduced with the decreasing of elastic modulus of the pad, and theposition of maximum pressure is shifted to the side edge of the pad, indicating the concentration of the high-pressure region can be effectively reduced and the bearing life can be improved by appropriately reducing the elastic modulus of the pad.
出处
《润滑与密封》
CAS
CSCD
北大核心
2015年第5期72-78,共7页
Lubrication Engineering
关键词
抽蓄机组
稳态运行
可倾瓦推力轴承
双向流固耦合
pumping storage unit
steady state operation
tilting-pad thrust bearing
two-way fluid-structure coupling
