流体机械2025，Vol.53Issue(3)：69-78,10.DOI:10.3969/j.issn.1005-0329.2025.03.009
超高速微织构螺旋槽干气密封热-流-固耦合分析
Heat-fluid-solid coupling analysis of ultra-high speed micro-textured spiral groove dry gas seal
摘要
Abstract
This study investigates the influence of axial deformation on the sealing performance of ultra-high speed dry gas seals under combined mechanical and thermal loads.A 3D geometric solid domain model and fluid domain model were established,incorporating complex effects such as real gas behavior and turbulence.The axial deformation patterns of the rotating and stationary rings,as well as their impact on sealing performance,were analyzed under extreme operating conditions(rotational speed n=40 000 r/min,inlet pressure Pi=8～14 MPa,inlet temperature Ti=373.15～493.15 K).Results show that mechanical deformation under n=40 000 r/min,Pi=11 MPa,and Ti=3373.15 K yields the maximum leakage rate(MS-DGS,4.19 g/s),while thermal deformation produces the minimum leakage(MS-DGS,1.69 g/s).The leakage rate under heat-flow-solid coupled deformation falls between these extremes(MS-DGS,3.66 g/s).Compared to conventional S-DGS,the MS-DGS exhibits reduced axial deformation and a 1.94%lower leakage rate.These findings provide critical insights for optimizing ultra-high speed dry gas seal design.关键词
干气密封/微织构/超高速/真实气体效应/热-流-固耦合/变形Key words
dry gas seal/micro-textured/ultra-high speed/real gas effect/heat-flow-solid coupling/deformation分类
机械工程引用本文复制引用
刘暅豪,丁雪兴,丁俊华..超高速微织构螺旋槽干气密封热-流-固耦合分析[J].流体机械,2025,53(3):69-78,10.基金项目
国家重点研发计划(2020YFB2010001) （2020YFB2010001）
研究生"创新之星"项目(2023CXZX-431) （2023CXZX-431）
