Contact characterizations of end faces in mechanical seals running-in

doi:10.3969/j.issn.0438-1157.2012.10.028

CIESC Journal ›› 2012, Vol. 63 ›› Issue (10): 3202-3207.DOI: 10.3969/j.issn.0438-1157.2012.10.028

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Contact characterizations of end faces in mechanical seals running-in

WEI Long^1,2, GU Boqin³, ZHANG Penggao^1,2, FANG Guifang^1,2

1. Institute of Fluid Sealing Measurement and Control, Nanjing College of Chemical Technology, Nanjing 210048, Jiangsu, China;
2. Fluid Sealing Measurement and Control Engineering Research and Development Center of Jiangsu Province, Nanjing 210048, Jiangsu, China;
3. School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 211816, Jiangsu, China

Received:2012-02-18 Revised:2012-04-01 Online:2012-10-05 Published:2012-10-05
Supported by:
supported by the Jiangsu Planned Projects for Fostering Talents in Six Scientific Fields(09-D-018,2010-JXQC-022).

机械密封磨合过程端面接触特性

魏龙^1,2, 顾伯勤³, 张鹏高^1,2, 房桂芳^1,2

1. 南京化工职业技术学院流体密封与测控技术研究所, 江苏南京 210048;
2. 江苏省流体密封与测控工程技术研究开发中心, 江苏南京 210048;
3. 南京工业大学机械与动力工程学院, 江苏南京 211816

通讯作者: 魏龙
作者简介:魏龙(1972- ),男,博士,副教授。
基金资助:
江苏省"六大人才高峰"资助项目(09-D-018,2010-JXQC-022);江苏省高校科研成果产业化推进项目(JH09-43,JH10-55)。

Abstract

Abstract: In order to study the change of contact characterizations of end faces in mechanical seal running-in,taking into account the difference between real micro contact area and micro contact cross-sectional area of end faces of mechanical seals,the expressions of the micro-contacting areas related to the critical elastic and plastic deformations were revised.The expressions of elastic contact area ratio,elastic-plastic contact area ratio and plastic contact area ratio for mechanical seals were derived.Running-in tests of B104a-70 mechanical seals were made with water as test medium.Test temperature was 20℃. Test pressure was 0.5 MPa. Spring pressure was 0.15 MPa. Rotating speed was 2900 r·min^-1.The results showed that the end face of the soft ring tended to be smoothened rapidly and its wear rate decreased quickly in running-in.The contact characterizations between end faces of mechanical seals changed greatly.The normalized real contact area increased from 0.00348 to 0.00567. The elastic contact area ratio increased from 0.716 to 0.822.The elastic-plastic contact area ratio decreased from 0.231 to 0.128. The plastic contact area ratio decreased from 0.053 to 0.050.

Key words: mechanical seal, end face, running-in, contact property, fractal theory

摘要： 为研究和掌握机械密封磨合过程端面接触特性的变化规律,考虑机械密封端面微凸体实际微接触面积与微接触截面积之间的区别,对微凸体临界弹性变形微接触面积和临界塑性变形微接触面积的表达式进行修正;推导得出机械密封端面弹性接触面积比、弹塑性接触面积比和塑性接触面积比的表达式。对B104a-70型机械密封进行磨合试验,试验介质为20℃清水,压力为0.5 MPa,弹簧比压为0.15 MPa,转速为2900 r·min^-1。研究结果表明,随着磨合过程的进行,软质环端面迅速趋于光滑,磨损率迅速减小;磨合使密封端面间的接触特性发生了较大的变化,量纲1真实接触面积由0.00348增大到0.00567,弹性接触面积比由0.716增大到0.822,弹塑性接触面积比由0.231降低到0.128,塑性接触面积比由0.053降低到0.050。

关键词: 机械密封, 端面, 磨合, 接触特性, 分形理论

CLC Number:

WEI Long, GU Boqin, ZHANG Penggao, FANG Guifang. Contact characterizations of end faces in mechanical seals running-in[J]. CIESC Journal, 2012, 63(10): 3202-3207.

魏龙, 顾伯勤, 张鹏高, 房桂芳. 机械密封磨合过程端面接触特性[J]. 化工学报, 2012, 63(10): 3202-3207.

References 15

[1]	Zeng Tao(曾涛).Influence factors of mechanical seals face on wear performance[J].Journal of Sichuan Institute of Light Industry and Chemical Technology(四川轻化工学院学报),2000,13(1):47-49
[2]	Gu Yongquan(顾永泉).Practical Technology of Mechanical Seals(机械密封实用技术)[M].Beijing:Mechanical Industrial Press,2001:59-74
[3]	Sun Jianjun(孙见君),Gu Boqin(顾伯勤),Wei Long(魏龙),Feng Xiu(冯秀),Liu Qihe(刘其和).Predicting seal life for contact mechanical seals[J].Journal of Chemical Industry and Engineering(China)(化工学报),2008,59(12):3095-3100
[4]	Peng Xudong(彭旭东),Yu Mingbin(于明彬),Meng Xiangkai(孟祥铠),Bai Shaoxian(白少先),Sheng Song'en(盛颂恩).Effect of face wear on sealing performance of U-grooved mechanical seals[J].Journal of Shanghai Jiaotong University(上海交通大学学报),2010,44(12):1721-1726
[5]	Wei Long,Gu Boqin,Feng Xiu.Fractal characteristics of end faces of carbon-graphite seal rings//2009 International Conference on Measuring Technology and Mechatronics Automation.Hunan,China:IEEE Computer Society,2009:813-816
[6]	Wei Long(魏龙),Gu Boqin(顾伯勤),Sun Jianjun(孙见君),Feng Fei(冯飞),Feng Xiu(冯秀).Optimization of surface fractal dimension of friction pair in mechanical seals[J].CIESC Journal(化工学报),2010,61(1):132-136
[7]	Majumdar A,Bhushan B.Role of fractal geometry in roughness characterization and contact mechanics of surfaces[J].Journal of Tribology(ASME),1990,112(4):205-216
[8]	Majumdar A,Bhushan B.Fractal model of elastic-plastic contact between rough surfaces[J].Journal of Tribology(ASME),1991,113(1):1-11
[9]	Wei Long(魏龙),Gu Boqin(顾伯勤),Feng Xiu(冯秀),Feng Fei(冯飞).Contact fractal model for friction faces of mechanical seals[J].CIESC Journal(化工学报),2009,60(10):2543-2548
[10]	Johnson K L.Contact Mechanics[M].Cambridge:Cambridge University Press,1985:45-90
[11]	Bhushan B.Introduction to Tribology[M].New York:John Wiley&Sons,2002:56-72
[12]	Sackfield A,Hills D A.Some useful results in the tangentially loaded hertzian contact problem[J].Strain Analysis,1983,18(3):107-110
[13]	Stolarski T A.A probabilistic approach to wear prediction[J].Journal of Physics D:Applied Physics,1990,23:1143-1149
[14]	Wei Long(魏龙),Gu Boqin(顾伯勤),Sun Jianjun(孙见君).Development of the computer aided testing device for mechanical seals[J].Lubrication Engineering(润滑与密封),2006,31(4):136-139
[15]	Ge Shirong(葛世荣),Zhu Hua(朱华).Complicate tribological systems and quantitative study methods of their problems[J].Tribology(摩擦学学报),2002,22(5):405-408

Contact characterizations of end faces in mechanical seals running-in

机械密封磨合过程端面接触特性

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