端面微尺度效应和热黏效应对干气密封性能的影响

doi:10.3969/j.issn.0438-1157.2013.09.030

化工学报 ›› 2013, Vol. 64 ›› Issue (9): 3291-3300.DOI: 10.3969/j.issn.0438-1157.2013.09.030

端面微尺度效应和热黏效应对干气密封性能的影响

许静, 彭旭东, 白少先, 李纪云, 王玉明

浙江工业大学过程装备及其再制造教育部工程研究中心, 浙江杭州 310032

收稿日期:2013-01-10 修回日期:2013-05-15 出版日期:2013-09-05 发布日期:2013-09-05
通讯作者: 彭旭东
作者简介:许静(1986- ),女,博士研究生。
基金资助:
国家自然科学基金项目(51175740,51275473);浙江省自然科学基金杰出青年团队项目(R1090833);教育部博士点基金项目(20103317110002)。

Effects of surface micro-scale and thermal viscosity on sealing performance of spiral-grooved dry gas seal

XU Jing, PENG Xudong, BAI Shaoxian, LI Jiyun, WANG Yuming

MOE Engineering Research Center of Process Equipment and Its Remanufacture, Zhejiang University of Technology, Hangzhou 310032, Zhejiang, China

Received:2013-01-10 Revised:2013-05-15 Online:2013-09-05 Published:2013-09-05
Supported by:
supported by the National Natural Science Foundation of China(51175740,51275473),Zhejiang Science Fund for Outstanding Youths(R1090833)and Ph.D.Programs Foundation of Ministry of Education of China(20103317110002).

摘要/Abstract

摘要： 考虑干气密封环端面微尺度效应及气膜的热黏效应,基于气体多变过程理论和气体润滑理论,对可压缩流体条件下的扩展平均雷诺方程进行修正,并应用有限元法进行求解;通过改变密封的操作参数,分析研究了端面微尺度效应和热黏效应对干气密封性能的影响规律。结果表明,干气密封在正常工作状态下,压力的升高使气体滑移流和表面粗糙度之间的耦合效应减弱,对泄漏率有固定的影响。若量纲1膜厚H_s<3.5,应考虑表面粗糙度对密封性能的影响;当逆Knudsen数B≥21或Knudsen数Kn≤0.0476时,可忽略气体滑移流效应的影响;热黏效应和表面粗糙度能提高密封动压效应,降低泄漏率,而气体滑移流效应却使泄漏率增大,端面承载能力降低;在低速高压下,表面粗糙度比滑移流效应对密封性能的影响大;当外压p_o≥2.02 MPa时,热黏效应在对密封性能影响中占主导地位。

关键词: 螺旋槽干气密封, 表面粗糙度, 滑移流, 热黏效应, 微尺度效应

Abstract: Considering the effects of both surface micro-scale and gas film thermal viscosity,the expansion average Reynolds equation for compressible fluids was modified based on the theories of gas polytrophic process and gas lubrication.The modified Reynolds equation was solved with the finite element method. The effects of micro-scale and thermal viscosity on a spiral groove dry gas seal(S-DGS)performance were investigated with numerical solution of the modified Reynolds equation.When S-DGS was under normal running conditions,the couple effects of gas slip flow and surface roughness were lessened and even disappeared,and only the influence on leakage was at a fixed value with the pressure increased.The influence of surface roughness on sealing performance should be considered when the non-dimensional film thickness H_s<3.5.If the inverse Knudsen number B≥21 or Knudsen number Kn≤0.0476,influence of gas slip flow could be ignored.Sealing dynamic pressure was increased,while leakage decreased due to the effects of surface roughness and thermal viscosity.On the contrary,the influence of gas slip flow increased leakage and reduced loading capacity of gas film.When the S-DGS was operating at low speed and high pressure,the influence of gas sliding flow on sealing performance was less than the influence of surface roughness.When p_o≥2.02 MPa,thermal viscosity effect dominated in affecting sealing performance.

Key words: S-DGS, surface roughness, gas slip flow, thermal viscosity effect, micro-scale effect

中图分类号:

TH117.2

许静, 彭旭东, 白少先, 李纪云, 王玉明. 端面微尺度效应和热黏效应对干气密封性能的影响[J]. 化工学报, 2013, 64(9): 3291-3300.

XU Jing, PENG Xudong, BAI Shaoxian, LI Jiyun, WANG Yuming. Effects of surface micro-scale and thermal viscosity on sealing performance of spiral-grooved dry gas seal[J]. CIESC Journal, 2013, 64(9): 3291-3300.

参考文献 22

[1]	Glienicke J,Launert A,Schlums H.Non-contacting gas lubricated face seals[J].Engineering Design,1994,1(2):38-44
[2]	Peng Xudong(彭旭东),Li Jiyun(李纪云),Sheng Song'en(盛颂恩),et al.Effect of surface roughness on performance prediction and geometric optimization of a spiral groove face seal[J].Tribology(摩擦学学报),2007,27(6):567-572
[3]	Pecht G G,Netzel J P.Design and application of non-contacting gas lubricated seals for slow speed services[J].Lubr.Eng.,1999,55(7):20-25
[4]	Chen C S.Gas flow in micro-channels using a boundary layer approach[J].Inter.J.of Computer applications in Tech.,2000,13(6):316-323
[5]	Ruan B.Finite element analysis of the spiral groove gas face at the slow speed and the low pressure condition-slip flow consideration[J].Tribology Trans.,2000,43(3):411-418
[6]	Bhushan B,Tonder K.Roughness-induced shear and squeeze film effects in magnetic recording(Ⅰ):Analysis[J].ASME Journal of Tribology,1989,111(2):220-227
[7]	Bhushan B,Tonder K.Roughness-induced shear and squeeze film effects in magnetic recording(Ⅱ):Applications[J].ASME Journal of Tribology,1989,111(2):228-237
[8]	Polycarpou A A,Etsion I.Static sealing performance of gas mechanical seals including surface roughness and rarefaction effects[J].Tribology Trans.,1998,41(4):531-536
[9]	Li Wanglong.Surface roughness effects in hydrodynamic lubrication involving the mixture of two fluids[J].ASME Journal of Tribology,1998,120(4):772-779
[10]	Feng Xiongzhong(冯向忠),Peng Xudong(彭旭东).Effect of surface roughness on performance of a spiral groove gas seal[J].Lubrication Engineering(润滑与密封),2006(1):20-22
[11]	Jiang Jihai(姜继海).Theoretical Solutions to Flowing Fluid Viscosity Changes in a Gap(液体变黏度缝隙流动理论与解析)[M].Beijing:National Defence Industry Press,2005
[12]	Xu Jing(许静),Peng Xudong(彭旭东),Bai Shaoxian(白少先),et al.Numerical analysis of gas thermal viscosity effect on performance of a spiral-grooved dry gas seal[J].Journal of Shanghai Jiaotong University(上海交通大学学报),2012,46(5):722-728
[13]	Patir N,Cheng H S.An average flow model for determining effects of three-dimensional roughness on partial hydrodynamic lubrication[J].ASME J. Lubr.Tech.,1978,100(1):12-17
[14]	Peng Xudong(彭旭东),Liu Kun(刘坤),Bai Shaoxian(白少先),et al.Dynamic opening characteristics of dry gas seal with typical types of spiral grooves[J].CIESC Journal(化工学报),2013,64(1):326-333
[15]	Polycarpou A A,Etsion I.A model for the static sealing performance of compliant metallic gas seals including surface roughness and rarefaction effects[J].Tribology Trans.,2000,43(2):237-244
[16]	Hua Ziqiang(华自强),Zhang Zhongjin(张忠进).Engineering Thermodynamics(工程热力学)[M].Beijing:Higher Education Press,2009:77-79
[17]	Xu Huafang(徐华舫).The Function of Gas Dynamics(Taxed)(空气动力学基础(上册))[M].Beijing:Beijing University of Aeronautics and Astronautics Press,1987
[18]	Peng Xudong(彭旭东),Tan Lili(谭丽丽),Sheng Song'en(盛颂恩),et al.Static analysis of a spiral-groove dry gas seal with an inner annular groove[J].Tribology(摩擦学学报),2008,28(6):507-511
[19]	Peng Xudong(彭旭东),Huang Li(黄莉),Bai Shaoxian(白少先),et al.Numerical analysis of sealing performance of dry gas seal with goose-grooves[J].CIESC Journal(化工学报),2010,61(12):3193-3199
[20]	Peng Xudong(彭旭东),Zhang Yuelin(张岳林),Bai Shaoxian(白少先),et al.Effect of rotational speed and sealing medium pressure on optimization of groove geometric parameters of a T-groove dry gas face seal[J].CIESC Journal(化工学报),2012,63(2):551-559
[21]	Peng Xudong(彭旭东),Huyan Chenlong(呼延晨龙),Bai Shaoxian(白少先),et al.Design of a biomorphic groove dry gas seal based on bird wing outlines[J].Tribology(摩擦学学报),2012,32(6):563-569
[22]	Yin Xiaoni(尹晓妮),Peng Xudong(彭旭东).Finite element analysis of a dry gas seal under slip flow conditions[J].Lubrication Engineering(润滑与密封),2006,31(4):55-59

端面微尺度效应和热黏效应对干气密封性能的影响

Effects of surface micro-scale and thermal viscosity on sealing performance of spiral-grooved dry gas seal

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