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董书娜,杜春华,崔亚辉.基于Archard模型的刷式密封单边磨损特性[J].航空动力学报,2020,(7):1437~1446
基于Archard模型的刷式密封单边磨损特性
,Unilateral wear characteristics of brush seal based on Archard model,
投稿时间:2020-01-03  
DOI:10.13224/j.cnki.jasp.2020.07.011
中文关键词:  刷式密封  磨损特性  单边磨损  黏着磨损  Archard模型
英文关键词:brush seal  wear characteristics  unilateral wear  adhesive wear  ,Archard model
基金项目:陕西省科技成果转移与推广计划(2018XNCG-G-11); 陕西省教育厅服务地方专项计划项目(19JC030);国家自然科学基金青年基金(51305343)
作者单位
董书娜 School of Mechanical and Precision Instrument Engineering,,Xi‘an University of Technology,Xi’an 710048,China
 
杜春华 School of Mechanical and Precision Instrument Engineering,,Xi‘an University of Technology,Xi’an 710048,China
 
崔亚辉 School of Mechanical and Precision Instrument Engineering,,Xi‘an University of Technology,Xi’an 710048,China
 
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中文摘要:
      为揭示刷式密封磨损规律,针对其结构特点构建了刷丝磨损量关于时间的一阶线性非齐次微分方程,求解得到刷丝磨损量、磨损率计算的数学模型。在此基础上数值研究了结构和工况参数对磨损量和磨损率的影响规律,并分析了结构参数对刷式密封磨损特性影响的灵敏度。结果显示:采用文中磨损计算结果进行的刷式密封考虑磨损效应的泄漏量计算结果与试验最大误差是778%,证明了计算模型的合理性。最终磨损量随刷丝直径、角度的增加而增大,刷丝高度、刷环内径对其没有影响。磨损率系数随刷丝直径、刷环内径的增加而增大,随刷丝高度、刷丝角度的增加而减小。结构参数对磨损总量影响的灵敏度由大到小依次为刷丝直径、刷丝角度、刷丝高度和刷环内径。
英文摘要:
      The first order linear non-homogeneous differential equation of brush wire wear with respect to time was constructed to explain the wear law of brush seals, and the mathematical model for calculating brush wire wear and wear rate was obtained. The effects of structure and operating condition parameters on wear and wear rate were numerically simulated, and the sensitivity of structure parameters to the influence of brush seal wear characteristics was also analyzed. The results showed that the maximum error between the experimental results and the calculation results of the brush seal considering wear effect leakage amount was 778% by the wear calculation result, proving the rationality of the calculation model. The final wear increased with the increase of brush wire diameter and angle, and the brush wire height and brush ring diameter had no effect on it. The initial wear rate increased with the increase of brush wire diameter and brush ring diameter, and decreased with the increase of brush wire height and brush wire angle. The sensitivity of the structure parameters to the total amount of wear was subject to brush wire diameter, brush wire angle, brush wire height and brush ring diameter.
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