基于瞬态有限元的齿轮箱迷宫密封泄漏研究

针对某高速列车齿轮箱迷宫密封的润滑油泄漏问题，基于ANSA软件建立齿轮箱及迷宫密封结构的有限元模型，并采用FLUENT软件对其进行多相流瞬态仿真分析，研究迷宫密封结构的相对啮合深度、节流齿厚、径向间隙、回油孔直径及个数、齿与台阶距离、齿宽、密封间隙对润滑油泄漏量的影响。结果表明：当相对啮合深度大于0.5时，润滑油泄漏量与相对啮合深度呈负相关；润滑油泄漏量与节流齿厚、回油孔直径、回油孔数量呈负相关；润滑油泄漏量与径向间隙、齿宽、齿与台阶距离、密封间隙呈正相关。根据研究结果对迷宫密封结构进行改进，改进后的迷宫密封结构润滑油泄漏量降低为原始泄漏量的3.6%。

Study on Gearbox Labyrinth Seal Leakage Based on Transient Finite Element

A finite element model of gearbox and labyrinth seal structure was established based on ANSA software and the multiphase flow transient simulation analysis was carried out by FLUENT software to solve the lubricating oil leakage problem of a high-speed train gearbox labyrinth seal.The influences of the relative meshing depth,throttle tooth thickness,radial clearance,diameter and number of oil return hole,distance between tooth and step,tooth width and seal clearance on the oil leakage of labyrinth seal structure were studied.The results show that when the relative meshing depth is greater than 0.5,the oil leakage is negatively correlated with the relative meshing depth.The oil leakage is negatively correlated with the throttle tooth thickness,the diameter and number of oil return hole.The oil leakage is positively correlated with radial clearance,tooth width,distance between tooth and step and seal clearance.According to the study results,the labyrinth seal structure was improved,and the oil leakage of the improved labyrinth seal structure was reduced to 3.6% of the original leakage.