静压型机械密封中螺钉预紧调节机制的研究

doi:10.3901/JME.2020.03.137

机械工程学报 ›› 2020, Vol. 56 ›› Issue (3): 137-143.doi: 10.3901/JME.2020.03.137

静压型机械密封中螺钉预紧调节机制的研究

何强¹, 王洪涛^2,3, 黄伟峰¹, 刘莹¹, 刘向锋¹, 李永健¹, 王玉明¹

1. 清华大学摩擦学国家重点实验室北京 100084;
2. 清华大学核能与新能源技术研究院北京 100084;
3. 清华大学先进反应堆工程与安全教育部重点实验室北京 100084

收稿日期:2019-03-11 修回日期:2019-07-26 出版日期:2020-02-05 发布日期:2020-04-09
通讯作者: 黄伟峰(通信作者),男,1978年出生,副研究员。主要研究方向为机械密封。E-mail:huangwf@tsinghua.edu.cn
作者简介:何强,男,1991年出生,博士研究生。主要研究方向为机械密封。E-mail:heqiang1100800722@163.com
基金资助:
国家自然科学基金（U1737202，51735006）和国家重点研发计划（2018YFB2000800）资助项目。

Regulation Mechanism of Screw Preloading in Hydrostatic Mechanical Face Seals

HE Qiang¹, WANG Hongtao^2,3, HUANG Weifeng¹, LIU Ying¹, LIU Xiangfeng¹, LI Yongjian¹, WANG Yuming¹

1. Department of Mechanical Engineering, Tsinghua University, Beijing 10084;
2. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084;
3. Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing 100084

Received:2019-03-11 Revised:2019-07-26 Online:2020-02-05 Published:2020-04-09

摘要/Abstract

摘要： 螺钉预紧力大小是静压型机械密封中重要的设计参数，考虑密封组件之间的多体接触关系与O形圈副密封的影响，建立了静压型机械密封的热流固耦合计算模型（Thermal fluid-solid interaction，TFSI），根据密封环与环座之间接触关系的转变，分析研究了螺钉预紧力对密封性能的调节机制。结果表明，螺钉预紧力对密封性能有着显著的影响，预紧力增大使得泄漏率增大，但其影响规律与密封环与环座之间接触关系有着密切的联系，同时发现，动环和静环在密封中起着不同的功能，并且环座的结构及边界条件的不同是导致动、静环功能差异性的重要原因。

关键词: 静压型机械密封, 多体接触, 流固热耦合, 螺钉预紧

Abstract: The preloading is an important design parameter in hydrostatic mechanical face seals. Considering the multi-body contact relationship between the sealing components and the influence of the O-ring secondary seal, a thermal fluid-solid interaction (TFSI) model for hydrostatic mechanical face seal is finally developed. According to the change of contact relationship between the seal ring and the support ring, the regulation mechanism of the preloading on the sealing performance is analyzed. The results show that the preloading of the screw has a significant effect on the sealing performance. The leakage rate increase as the preloading increases, and this change law is affected by the contact status between the seal ring and its support. Moreover, it is found that the stationary ring and the rotating ring play different roles in sealing, because the size and boundary conditions of the supporting rings are different.

Key words: hydrostatic mechanical seal, multi-body contact, TFSI model, screw preloading

中图分类号:

TB42

何强, 王洪涛, 黄伟峰, 刘莹, 刘向锋, 李永健, 王玉明. 静压型机械密封中螺钉预紧调节机制的研究[J]. 机械工程学报, 2020, 56(3): 137-143.

HE Qiang, WANG Hongtao, HUANG Weifeng, LIU Ying, LIU Xiangfeng, LI Yongjian, WANG Yuming. Regulation Mechanism of Screw Preloading in Hydrostatic Mechanical Face Seals[J]. Journal of Mechanical Engineering, 2020, 56(3): 137-143.

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静压型机械密封中螺钉预紧调节机制的研究

Regulation Mechanism of Screw Preloading in Hydrostatic Mechanical Face Seals

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