Numerical analysis of LaserFace liquid lubricated mechanical seal based on mass conservation

doi:10.3969/j.issn.0438-1157.2013.10.029

CIESC Journal ›› 2013, Vol. 64 ›› Issue (10): 3694-3700.DOI: 10.3969/j.issn.0438-1157.2013.10.029

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Numerical analysis of LaserFace liquid lubricated mechanical seal based on mass conservation

TANG Feixiang, MENG Xiangkai, LI Jiyun, PENG Xudong

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

Received:2013-02-22 Revised:2013-05-12 Online:2013-10-05 Published:2013-10-05
Supported by:
supported by the National Natural Science Foundation of China(51005209,51175740),the Zhejiang Science Fund for Outstanding Youths(R1090833)and the Ph.D.Programs Foundation of Ministry of Education of China(20103317110002).

基于质量守恒的LaserFace液体润滑机械密封数值分析

唐飞翔, 孟祥铠, 李纪云, 彭旭东

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

通讯作者: 彭旭东
作者简介:唐飞翔(1987-),男,硕士研究生。
基金资助:
国家自然科学基金项目(51005209,51175740);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)

Abstract

Abstract: The Jakobsson-Floberg-Olsson(JFO)cavitation boundary condition was used to solve the problem that traditional Reynolds cavitation boundary condition can not accurately predict the mechanical seal leakage rate.The mathematical model of LaserFace liquid lubricated mechanical seal(LF-MS)was established based on mass conservation.Lubrication equation was solved by the streamline upwind finite element method.The comparison of sealing performance among four types of a LF-MS,a general face seal,a general face seal with "entry flow" structures,a general face seal with "return flow" structures was performed under different operating conditions.The mathematical model could accurately predict the mechanical seal leakage rate.LF-MS end face was easy to open at a low speed,Return grooves had obvious return pumping action at a high speed and low pressure.The leakage rate of LF-MS was significantly lower than a general face seal with "entry flow" structures.The friction coefficient of LF-MS was smaller than that of the general end face.The overall performance was significantly better than the others.

Key words: mechanical seals, cavitation, mass conservation, finite element method, streamline-upwind

摘要： 针对传统Reynolds空化边界不能准确预测机械密封泄漏率的问题,采用JFO空化边界条件,建立了基于质量守恒的LaserFace液体润滑机械密封数学模型,采用流线迎风有限单元法求解润滑方程,对比分析了不同操作工况下4种不同端面型槽结构(普通端面、仅含引流槽端面、仅含回流槽端面、激光脸)的密封性能。结果表明:所建立数学模型可准确预测机械密封泄漏率,LaserFace端面在低速时易于打开,高速低压下回流槽具有明显回流泵送作用,LaserFace端面机械密封泄漏率显著低于仅含引流槽端面,摩擦系数小于普通端面,综合性能明显优于其他型槽结构。

关键词: 机械密封, 空化, 质量守恒, 有限元, 流线迎风

CLC Number:

TH117.2

TANG Feixiang, MENG Xiangkai, LI Jiyun, PENG Xudong. Numerical analysis of LaserFace liquid lubricated mechanical seal based on mass conservation[J]. CIESC Journal, 2013, 64(10): 3694-3700.

唐飞翔, 孟祥铠, 李纪云, 彭旭东. 基于质量守恒的LaserFace液体润滑机械密封数值分析[J]. 化工学报, 2013, 64(10): 3694-3700.

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Numerical analysis of LaserFace liquid lubricated mechanical seal based on mass conservation

基于质量守恒的LaserFace液体润滑机械密封数值分析

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