文章摘要
郝战焱,温鹏飞,金朝旭.可调控型气体密封的调控性能及复合开启特性[J].润滑与密封,2016,41(8):114-120
可调控型气体密封的调控性能及复合开启特性
Regulation Property and Compound Opening Characteristics of Regulatable Dry Gas Seals
  
DOI:10.3969/j.issn.0254-0150.2016.08.023
中文关键词: 可调控型气体密封  调控性  复合开启比
英文关键词: regulatable dry gas seal  regulation property  compound opening ratio
基金项目:北京市丰台区科技三项费基金项目
作者单位E-mail
郝战焱 北京航天试验技术研究所 hzyhaozhanyan@126.com 
温鹏飞 北京航天试验技术研究所  
金朝旭 北京航天试验技术研究所  
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中文摘要:
      为研究可调控型气体密封(R DGS)的调控和开启性能,基于气体润滑理论,引入调控比参数,建立R DGS数值分析模型,并提出将平衡膜厚作为控制目标。采用有限单元方法求解雷诺方程,研究实际工况下调控比对密封性能参数的影响规律。根据开启临界气膜厚度的假设,提出用于分析R DGS开启状态的判据——复合开启比。结果表明:主动调节调控比可使R DGS性能参数维稳在一定参数范围内,但参数范围随工况改变而不同;泵入式气体密封(Pi DGS)的调控性优于泵出式气体密封(Po DGS),但Po DGS比Pi DGS更易于开启。通过试验验证理论分析方法的正确性,为R DGS开启状态的判断提供一种方法。
英文摘要:
      To study the regulation property and opening behavior of a regulatable dry gas seal (R DGS),based on gas lubricated theory,a numerical model for a R DGS was set up by introducing into the parameter of regulation ratio of pressure and equilibrium film thickness was set as the regulatable target.Reynolds equation was resolved by using finite element method,and the effect on seal performances by varying regulation ratio was studied under the actual working conditions.With the hypothesis of critical gas film thickness,a criterion for expressing the opening behavior of R DGS,namely the compound opening ratio,was proposed.The results show that the seal performances of R DGS can be stabilized in a scope by varying the regulation ratio,but the scope varies with the working conditions.The regulation property of pumping in dry gas seal (Pi DGS) is better than that of pumping out dry gas seal (Po DGS),while the opening characteristic is on the contrary.The theoretical results of this method are verified by experiments,it provides a method for analyzing the opening behavior of R DGS.
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