A Comparative Research on the Characteristics of Dry Gas Seal with Double Pointed Grooves

WANG Heshun; LIU Xiaoming; ZHANG Chening; WANG Zeping; ZHU Weibing

doi:10.16078/j.tribology.2020149

TRIBOLOGY > 2021 > 41(6): 974-982. > DOI: 10.16078/j.tribology.2020149

WANG Heshun, LIU Xiaoming, ZHANG Chening, WANG Zeping, ZHU Weibing. A Comparative Research on the Characteristics of Dry Gas Seal with Double Pointed Grooves[J]. TRIBOLOGY, 2021, 41(6): 974-982. DOI: 10.16078/j.tribology.2020149

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A Comparative Research on the Characteristics of Dry Gas Seal with Double Pointed Grooves

1.
School of Mechanical Engineering, Xihua University, Sichuan Chengdu 610039, China
2.
Sichuan Nikki Seal Co Ltd, Sichuan Chengdu 610046, China

Funds: The project was supported by the key R&D projects of Science and Technology Department of Sichuan Province (2019YFG0351), the National Natural Science Foundation of China (52079118) and the Key Laboratory of Fluid and Power Machinery, Ministry of Education.

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Corresponding author:
WANG Heshun, E-mail: wangheshun@mail.xhu.edu.cn, Tel: +86-18030802010
Received Date: July 16, 2020
Revised Date: September 26, 2020
Accepted Date: December 06, 2020
Available Online: November 28, 2021
Published Date: November 27, 2021

Graphical Abstract

Abstract

Abstract

A new type of Double Pointed Groove (DPG) seal face was proposed, which was composed of two spiral grooves with different groove depth and the same radial length and one circular arc groove. The mathematical model of the DPG and the Dovetail Spiral Groove (DSG) face seal was established, and the numerical calculation was carried out by using the finite difference method. In the small clearance area, the DPG had larger opening force, leakage, stiffness and ratio of stiffness to leakage, and the smaller the clearance, the greater the difference. When h₀<3.0 μm, the DPG had larger opening force; when h₀<6.0 μm, the film stiffness of the DPG was larger than that of the DSG; when h₀<6.8 μm, the DPG had larger stiffness leakage ratio. In the area with a clearance of 3.0~5.0 μm, the stiffness of DPG had a significant increase compared to the DSG with the depth of 10 μm and 8 μm. And the relative change (RC) was about 6% compared with the DSG of 5 μm. When h₀<3.0 μm, the leakage of the DPG was higher than that of the DSG, but the leakage value did not exceed the design value, and the basic sealing performance index was qualified. Therefore, the DPG had better comprehensive performance under the condition that the leakage did not exceed the standard.
- seals,
- mechanical seals,
- dry gas seals,
- double pointed grooves,
- spiral grooves,
- numerical calculation

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References (23)

References

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A Comparative Research on the Characteristics of Dry Gas Seal with Double Pointed Grooves