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浙江大学学报(工学版)  2017, Vol. 51 Issue (8): 1568-1574    DOI: 10.3785/j.issn.1008-973X.2017.08.012
机械与能源工程     
高速无杆气缸作动器密封圈润滑性能分析
姚琳, 马大为, 任杰, 姚建勇, 仲健林, 马吴宁
南京理工大学 机械工程学院, 江苏 南京 210094
Lubrication performance analysis of high-speed rod-less cylinder seal
YAO Lin, MA Da-wei, REN Jie, YAO Jian-yong, ZHONG Jian-lin, MA Wu-ning
School of Mechanical Engineering, Nangjing Univerisity of Science and Technology, Nanjing 210094, China
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摘要:

针对高速无杆气缸作动器密封圈润滑状态随滑动速度变化的特点,提出直线滑动密封"临界速度"概念,分析作动器密封圈润滑性能.建立密封圈润滑状态二维高效分析模型,在全速范围内,对"临界速度"进行初步定位,并揭示预压缩量、唇角和温度对润滑性能的影响机理.考虑摩擦生热和热流分配原则,获得接触域油膜温度边界;结合Gauss分布函数和点云法,构建油膜三维微观计算域;建立密封圈润滑状态三维精确分析模型,对"临界速度"进行精确定位,揭示纹理特征对润滑性能的影响机理.研究结果表明:预压缩量越大、唇角越大、润滑油温度越高,临界速度越高;密封圈三维微观形貌对临界速度的影响明显,相同条件下具有各向同性的微观表面更容易形成完全润滑.

Abstract:

The concept of critical speed' was proposed for the lubrication status varying with sliding speed. The two-dimensioned efficient analysis models were established to analyze the lubrication performance of high-speed rod-less cylinder seal ring. The primary mapping of ‘critical speed’ was determined in whole speed range and the influence factors such as compression ratios, seal angle and the temperature were revealed. The oil temperature boundary was obtained by calculating friction heat and the coefficient of heat partition. The oil's three-dimensional micro-model based on Gauss distribution function and exponential autocorrelation function was onstructed to describe the geometry morphology of real rough surface. The three-dimensional precision analysis model was established and the precision location of ‘critical speed’ was got. The influence of seal surface texture an lubrication performance was investigated. Results show that the ‘critical speed’ increases with the compression ratios, seal angle and the temperature increasing The influence for ‘critical speed’ is obvious. The isotropic micro-surface texture is more easily to form hydrodynamic lubrication.

收稿日期: 2017-01-25 出版日期: 2017-08-16
CLC:  TJ768  
基金资助:

国家自然科学基金面上资助项目(51675279);江苏省自然科学基金资助项目(BK20170837);国防基础科研资助项目(B2620110005).

通讯作者: 任杰,男,副教授.ORCID:0000-0002-1998-0729.     E-mail: renjie@njust.edu.cn
作者简介: 姚琳(1988-),男,博士生,从事高压气动技术,新型导弹弹射等技术.ORCID:0000-0002-5431-4115.E-mail:yaolinxueshu@163.com
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引用本文:

姚琳, 马大为, 任杰, 姚建勇, 仲健林, 马吴宁. 高速无杆气缸作动器密封圈润滑性能分析[J]. 浙江大学学报(工学版), 2017, 51(8): 1568-1574.

YAO Lin, MA Da-wei, REN Jie, YAO Jian-yong, ZHONG Jian-lin, MA Wu-ning. Lubrication performance analysis of high-speed rod-less cylinder seal. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(8): 1568-1574.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2017.08.012        http://www.zjujournals.com/eng/CN/Y2017/V51/I8/1568

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