Full Text:   <316>

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CLC number: TH117

On-line Access: 2019-11-08

Received: 2019-04-30

Revision Accepted: 2019-09-06

Crosschecked: 2019-10-17

Cited: 0

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Citations:  Bibtex RefMan EndNote GB/T7714


Xu-dong Peng


Xiao Yang


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Journal of Zhejiang University SCIENCE A 2019 Vol.20 No.11 P.864-881


Thermo-elasto-hydrodynamic analysis of triangular textured mechanical face seals

Author(s):  Xiao Yang, Xu-dong Peng, Xiang-kai Meng, Jin-bo Jiang, Yu-ming Wang

Affiliation(s):  MOE Engineering Research Center of Process Equipment and Its Remanufacture, Zhejiang University of Technology, Hangzhou 310032, China

Corresponding email(s):   xdpeng@126.com

Key Words:  Thermo-elasto-hydrodynamic (TEHD), Mechanical seal, Surface texturing, Triangular dimple, Aviation piston pump

Xiao Yang, Xu-dong Peng, Xiang-kai Meng, Jin-bo Jiang, Yu-ming Wang. Thermo-elasto-hydrodynamic analysis of triangular textured mechanical face seals[J]. Journal of Zhejiang University Science A, 2019, 20(11): 864-881.

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publisher="Zhejiang University Press & Springer",

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%T Thermo-elasto-hydrodynamic analysis of triangular textured mechanical face seals
%A Xiao Yang
%A Xu-dong Peng
%A Xiang-kai Meng
%A Jin-bo Jiang
%A Yu-ming Wang
%J Journal of Zhejiang University SCIENCE A
%V 20
%N 11
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%@ 1673-565X
%D 2019
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1900163

T1 - Thermo-elasto-hydrodynamic analysis of triangular textured mechanical face seals
A1 - Xiao Yang
A1 - Xu-dong Peng
A1 - Xiang-kai Meng
A1 - Jin-bo Jiang
A1 - Yu-ming Wang
J0 - Journal of Zhejiang University Science A
VL - 20
IS - 11
SP - 864
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%@ 1673-565X
Y1 - 2019
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1900163

A 3D thermo-elasto-hydrodynamic (TEHD) model is presented to study the effects of triangular dimples on the load-carrying capacity, leakage and friction of a mechanical seal operated under mixed or full film lubrication conditions. The model is solved by the finite element method (FEM), which takes into account the effects of the Jakobsson-Floberg-Olsson (JFO) cavitation boundary condition, surface roughness, elastic-plastic contact, thermo-elastic deformation, and the temperature-viscosity relation. The numerical results of the TEHD model are quite different from those of the hydrodynamic (HD) and thermo-hydrodynamic (THD) models, especially at high speeds. In order to obtain the optimum shape and distribution of the triangular dimples, a comparative study is conducted to investigate different distributions of equilateral triangles and isosceles right triangles. The results show that a surface textured mechanical seal with isosceles right triangular dimples has the most significant hydrodynamic and pumping effects which, in turn, are beneficial to sealing face opening behavior and leakage limitation. The theoretical results are in good agreement with the experimental ones, and offer new guidance for the future design and development of high-speed mechanical seals for aviation piston pumps.

By considering the cavitation boundary, surface roughness, elastic-plastic contact, thermo-elastic deformation, and temperature-viscosity relation, the manuscript under review developed a 3-D TEHD model for the surface texturing mechanical seal which can be used in piston pumps, nuclear pump and other rotating machinery and equipment systems. The theoretical results have been compared with those of the HD and THD models under the high-speed conditions, and the accuracy of THED has been discussed. The study process and results have important theoretical and engineering practical values for predicting the seal performance or designing such high-performance seal.


创新点:1. 建立机械密封热弹性流体动力润滑模型,揭示三角形织构在混合和全膜润滑条件下的减磨减漏机理. 2. 以低摩擦和低泄露为目标,采用数值模拟和实验方法,优化三角形织构的形状和排布方式.
方法:1. 通过理论推导,建立机械密封热弹性流体动力润滑模型,并与热流体动力润滑模型和流体动力润滑模型进行对比,发现热弹性流体动力模型更符合实际情况(图6~10); 2. 通过数值模拟,优化三角形织构的形状、排布以及深度(图14~22). 3. 通过实验研究,测得织构端面温度,验证热弹流理论模型的正确性(图25).
结论:1. 由于机械密封的热力变形,密封端面形成收敛性间隙,因此更有利于减少泄漏; 2. 与同向排布相比,相向排布的三角形织构能产生更强的流体 动压效应,且内外径织构数目越多、数目差距越小时,动压效应越强; 3. 直角三角形织构的动压效应强于等边三角形织构,并且在一定工况下能产生足够的液膜承载力使密封端面开启.


Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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