缝隙节流浮环动静压推力轴承紊流有限元分析

深浅腔缝隙节流浮环动静压推力轴承在高速运转时 ,随着流体惯性力的影响不断增加 ,最终导致流态由层流变为紊流 .采用普遍的考虑流体紊流效应的经验方法 ,在得到计入迁移惯性项的径推浮环动静压推力轴承非定常Reynolds方程的基础上 ,通过在方程左端项加入紊流因子的方法建立相应的紊流Reynolds方程 .采用有限元法求得轴承内外膜的压力场分布 ,结果表明 ,紊流态下的压力场分布与相同工况下层流态压力场相比发生了明显的变化 ,从而使轴承的性能参数也发生相应改变 .

Finite Element Analysis of the Turbulence on Crevice Throttle Floating-ring Hybrid Thrust Bearing

When the floating ring hybrid thrust bearing with the structure of deep and shallow cavity crevice throttle runs in high speed,with the increase of inertia force,the fluid state transforms from laminar flow to turbulent flow. The turbulence reynolds equation is developed by adding the turbulent factors to the non-normal Reynolds equation by using the experiment method which considers the turbulent effect.The pressure distribution of the bearing is worked out by using the finite element method.The calculations demonstrate that the turbulence pressure distribution varies apparently compared with the laminar pressure distribution in which the work condition is similar to the turbulence,thus the behavior of the bearing becomes different.