• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (21): 22-28.doi: 10.3901/JME.2020.21.022

• 特邀专栏:核能装备设计制造及服役 • 上一篇    下一篇

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推力瓦热瞬态变形机理及抑制方法研究

王悦昶1,2, 刘莹1, 张高龙3, 王占朝4, 王玉明1   

  1. 1. 清华大学摩擦学国家重点实验室 北京 100084;
    2. 利兹大学功能表面研究所 利兹 LS2 9JT 英国;
    3. 清华大学神经调控技术国家工程实验室 北京 100084;
    4. 清华大学汽车安全与节能国家重点实验室 北京 100084
  • 收稿日期:2020-04-29 修回日期:2020-06-05 出版日期:2020-11-05 发布日期:2020-12-19
  • 作者简介:王悦昶,男,1993年出生。主要研究方向为流体密封技术。E-mail:y.wang1@leeds.ac.uk;刘莹(通信作者),女,1965年出生,博士,副教授。主要研究方向为机械设计及理论、流体润滑技术。E-mail:liuying@mail.tsinghua.edu.cn
  • 基金资助:
    国家重点基础研究发展计划(973计划,2015CB057303)和国家自然科学基金(51975315)资助项目。

Research on Thermal Transient Deformation Mechanism and Suppression Method of Thrust Pad

WANG Yuechang1,2, LIU Ying1, ZHANG Gaolong3, WANG Zhanchao4, WANG Yuming1   

  1. 1. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084;
    2. Institute of Functional Surfaces, University of Leeds, Leeds, LS2 9JT UK;
    3. National Engineering Laboratory of Neuromodulation, Tsinghua University, Beijing 100084;
    4. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084
  • Received:2020-04-29 Revised:2020-06-05 Online:2020-11-05 Published:2020-12-19

摘要: 针对核主泵水润滑推力轴承在事故工况下的热瞬态过程,建立了热固耦合瞬态有限元分析模型。基于所建立模型,分析了常见两层和三层结构推力瓦热瞬态过程瓦面变形,重点分析了三层结构推力瓦隔热层厚度对瓦面变形的影响。随后,进一步探索了遏制瓦面凹变形的方法,阐明了热瞬态过程中瓦面温度场分布不均是产生瓦面凹变形的主因。进一步提出一种新型包边式推力瓦,并仿真验证其能够有效降低热瞬态过程瓦面凹变形,为核主泵水润滑推力轴承的推力瓦设计提供了新思路。

关键词: 推力轴承, 推力瓦, 热瞬态, 瓦面变形

Abstract: Water lubricated thrust bearings in reactor coolant pumps (RCP) experience thermal transient processes during the accident conditions. A thermal-solid coupling model is developed for the thermal transient processes by finite element method. Based on the developed model, conventional double-layer and triple-layer thrust pads are analyzed to obtain the surface deformation during the thermal transient processes. In particularly, the effect of the thickness of heat insulation layer in triple-layer pad on surface deformation is discussed. Subsequently, several suppression methods to reduce the concave deformation of the pad surface are analyzed. The simulations indicate that the leading mechanism of forming the concave deformation is the uneven distribution of tile surface temperature field during the thermal transient processes. With this understanding, a new type of thrust pad having the edge of the thrust pad surface wrapped is proposed, which is verified by simulation to efficiently reduce the concave deformation during the thermal transient processes. This work provides a new thought to design the thrust pad of the water lubricated thrust bearings in RCP.

Key words: thrust bearings, thrust pad, thermal transient, pad surface deformation

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