流体机械2024，Vol.52Issue(3)：24-32,9.DOI:10.3969/j.issn.1005-0329.2024.03.004
超高速干气密封微织构气膜润滑特性研究
Study on lubrication characteristics of micro-textured gas film in ultra-high speed dry gas seal
摘要
Abstract
In response to the problems of ultra-high speed,high-pressure operation,dry gas seal stability of equipment in the aerospace field,based on the optimized design of groove texture,a dry gas seal structure with micro-textured spiral groove at the bottom of the groove was proposed to solve the problem of the stability of the gas film in the process of ultra-high-speed rotation of the seal.Based on the theory of gas lubrication,a model was built,mesh division was carried out,and then imported into Fluent to simulate the flow field;after changing the working condition parameters and the parameters of the groove structure,compared with the ordinary spiral groove under the high pressure and ultra-high speed conditions,the dynamic pressure effect of spiral groove dry gas seal with micro-texture at groove bottom was significantly improved.The results show that when the groove depth hg=6 μm,film thickness h0=2 μm,microtextured groove depth δ =2 μm,microtextured groove width 3.97 mm,and microtextured groove is located in the middle of the bottom of the spiral groove,the microtextured spiral groove at the bottom of the groove can produce a significant dynamic pressure effect compared with the ordinary spiral groove.关键词
槽底微织构/螺旋槽/干气密封/超高速/动压效应Key words
microtexture at groove bottom/spiral groove/dry gas seal/ultra-high speed/dynamic pressure effect分类
机械制造引用本文复制引用
刘暅豪,丁雪兴,徐洁,丁俊华,张志敏..超高速干气密封微织构气膜润滑特性研究[J].流体机械,2024,52(3):24-32,9.基金项目
国家重点研发计划项目(2020YFB2010001) （2020YFB2010001）
研究生"创新之星"项目(2023CXZX-431) （2023CXZX-431）
