内燃机工程2025，Vol.46Issue(2)：121-128,8.DOI:10.13949/j.cnki.nrjgc.2025.02.014
燃气轮机轴承腔处刷式密封设计与优化
Design and Optimization of Brush Seal in Gas Turbine Bearing Cavity
摘要
Abstract
Aiming at the sealing problem of the gas turbine bearing cavity,a two-stage staggered brush seal structure was designed.A porous media model was used to analyze the pressure and velocity distribution of the seal under specific working conditions.The effects of structural parameters on the sealing performance of the brush seal,such as the fiber diameter,the thickness of the bristle and the inclination angle of the brush,were investigated by using the finite element analysis method.Orthogonal test method was used to analyze the leakage of different combinations of structural parameters.The structural parameters that have effects on the sealing performance from the strongest effects to the least effects are fiber diameter,back baffle gap,bristle thickness,cant angle of brush and front baffle gap.Combined with the actual processing capability,the structural parameters were optimized.The preferred structural parameters include fiber diameter 0.005 mm,bristle thickness 3 mm,cant angle of brush 20°,front baffle gap 1.6 mm and back baffle gap 0.6 mm.The mass flow rate of the optimized structure is 11.24 g/s,and the sealing performance of the optimized structure is improved by 62.51%compared with that before optimization.关键词
刷式密封/正交试验/多孔介质/流场分析Key words
brush seal/orthogonal experiment/porous media/flow field analysis分类
机械制造引用本文复制引用
尹易,朱维兵,胡峻瑞,颜招强,王和顺..燃气轮机轴承腔处刷式密封设计与优化[J].内燃机工程,2025,46(2):121-128,8.基金项目
四川省国际港澳台科技创新合作项目(2024YFHZ0338) Sichuan International S&T Cooperation and Exchange R&D Project(2024YFHZ0338) （2024YFHZ0338）
