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Research Papers: Operations, Applications and Components

Study on the Compression-Resilience and Sealing Performance of New Metal-to-Metal Contact Gasket

[+] Author and Article Information
Zhou Xianjun

College of Mechanical and
Electronic Engineering,
China University of Petroleum (East China),
No. 66, Changjiang West Road,
Huangdao District,
Qingdao 266580, Shandong, China
e-mail: zxjqhy@126.com

Zhai Haodong

College of Mechanical and
Electronic Engineering,
China University of Petroleum (East China),
No. 66, Changjiang West Road,
Huangdao District,
Qingdao 266580, Shandong, China
e-mail: zhaihaodong518@163.com

Wen Weipeng

Shanghai Micro Electronics Equipment Co., Ltd.,
No. 1525, Zhangdong Road,
Zhangjiang Hi-Tech Park,
Pudong 201203, Shanghai, China
e-mail: wenweipeng171@163.com

Wu Yanze

College of Mechanical and
Electronic Engineering,
China University of Petroleum (East China),
No. 66, Changjiang West Road,
Huangdao District,
Qingdao 266580, Shandong, China
e-mail: wuyanze0226@163.com

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received October 24, 2016; final manuscript received January 20, 2018; published online February 20, 2018. Assoc. Editor: Reza Adibiasl.

J. Pressure Vessel Technol 140(2), 021601 (Feb 20, 2018) (9 pages) Paper No: PVT-16-1201; doi: 10.1115/1.4039122 History: Received October 24, 2016; Revised January 20, 2018

The compression-resilience performance of new metal-to-metal contact (MMC) gasket at different temperatures was studied by compression-resilience test, and the influences on sealing performance of gasket caused by internal pressure of medium and assembly stress were studied by sealing test. Then the influences on performance of gasket caused by internal pressure of medium, bolt pretightening force, and temperature were studied through finite element method of ANSYS. According to the results of test and numerical analysis, conclusions are as follows: The new MMC gasket has good high-temperature stability from results of tests at different temperatures. When the MMC occurs between flange and gasket, the contact stress of new MMC gasket is about 50 MPa. When applying loads, the limiting ring of gasket is able to bear parts of bolt loads, and when reducing loads, its resilience can compensate loss of gasket stress. In this case, the stress on sealing surface of gasket remains stable so that the leakage rate can keep in a stable range. Because of its unique structure in design, the inner contact stress of new MMC gasket increases with the rise of internal pressure of medium so that in a certain range, the leakage rate changes gently, which shows that the gasket has a certain self-sealing ability. Besides, the new MMC gasket is able to adapt to high temperature and fluctuation of internal pressure of medium.

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References

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Figures

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Fig. 1

New MMC gasket: (a) three-dimensional model and (b) practicality picture

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Fig. 2

Configuration of spiral wound gasket

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Fig. 3

Nuclear grade graphite gasket

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Fig. 4

Bimetal sealing corrugated composite gasket

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Fig. 5

Sectional view of new MMC gasket

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Fig. 6

Equipment of compression-resilience test

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Fig. 7

Equipment of sealing test

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Fig. 8

Curve of compression-resilience performance of new MMC gasket at room temperature

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Fig. 9

Curves of compression-resilience performance of new MMC gasket at different temperatures

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Fig. 10

Relationship between leakage rate of new MMC gasket and internal pressure of medium at room temperature

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Fig. 11

Relationship between leakage rate of new MMC gasket and assembly stress at room temperature

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Fig. 12

Entity model of ANSYS

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Fig. 13

Boundary conditions

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Fig. 14

von Mises stresses diagram of MMC flange connection

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Fig. 15

von Mises stresses diagram of gasket

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Fig. 16

Distribution of gasket stress in gasket radial position from inner diameter

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Fig. 17

Distribution of gasket stress in circumferential direction

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Fig. 18

Distributions of gasket stress in gasket radial position from inner diameter at different internal pressures of medium

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Fig. 19

Distributions of gasket stress in gasket radial position from inner diameter at different bolt pretightening forces

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Fig. 20

von Mises stresses diagram of gasket in homogeneous temperature field

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Fig. 21

Curves of node stress at different temperatures: (a) case of node stress on inner gasket and (b) case of node stress on outer gasket

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Fig. 22

Distributions of gasket stress in radial direction at different temperatures

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Fig. 23

Curves of node stress with the fluctuation of internal pressure of medium: (a) case of node stress on inner gasket and (b) case of node stress on outer gasket

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Fig. 24

Distributions of gasket stress in radial direction with the fluctuation of internal pressure of medium

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