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
刘暅豪 1丁雪兴 1徐洁 1丁俊华 1张志敏1
作者信息
- 1. 兰州理工大学 石油化工学院,兰州 730050
- 折叠
摘要
针对航天航空领域,设备超高速、高压运转,干气密封稳定性问题,依据槽型织构优化设计,提出一种槽底微织构螺旋槽干气密封结构,以解决密封在超高速旋转过程中气膜稳定性问题.基于气体润滑理论,建模、划分网格,再导入FLUENT软件对流场进行仿真模拟;改变工况参数和槽型结构参数后,在超高速、高压工况下,相比于普通螺旋槽,槽底微织构螺旋槽干气密封的动压效果有显著提升.结果表明,槽深hg=6 μm,膜厚h0=2 μm,微织构槽深δ =2 μm、微织构槽宽取3.97 mm,微织构槽位于螺旋槽底中间位置时,槽底微织构螺旋槽相比于普通螺旋槽可产生明显的动压效应.
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引用本文复制引用
基金项目
国家重点研发计划(2020YFB2010001)
研究生"创新之星"项目(2023CXZX-431)
出版年
2024
国家科技期刊平台
NSTL
万方数据