缝隙节流浮环动静压推力轴承紊流有限元分析-《郑州大学学报(工学版)》

文章信息/Info

Title:: Finite element analysis of turbulent flow of gap throttling floating ring dynamic and static thrust bearings

Keywords:: Gap throttling; dynamic and static pressure; thrust bearings; turbulence; Reynolds equation

摘要:: 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.

Abstract:: When the deep and shallow gap throttling floating ring dynamic and static thrust bearings are running at high speed, the influence of the inertial force of the fluid increases, which eventually leads to the flow state changing from laminar flow to turbulent flow. Using the general empirical method considering the fluid turbulence effect, the corresponding turbulence Reynolds equation is established by adding turbulence factor to the left term of the equation on the basis of obtaining the unsteady Reynolds equation for radial thrust floating ring dynamic static thrust bearings that are included in the migration inertia term. The finite element method is used to obtain the pressure field distribution of the bearing inner and outer membranes, and the results show that the pressure field distribution under turbulent flow state changes significantly compared with the pressure field of laminar flow under the same working conditions, so that the performance parameters of the bearing also change accordingly.