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| Steady-state Performance Analysis of Derived T-groove Dry Gas Seal |
| Received:December 29, 2023 Revised:February 07, 2024 |
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| DOI：10.7643/issn.1672-9242.2024.03.014 |
| KeyWord:T-groove dry gas seal micro-channel flow derived structure simulation calculation pressurization effect |
| Author | Institution |
| DING Xuexing |
College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou , China |
| JIANG Andi |
College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou , China |
| WANG Shipeng |
College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou , China |
| DING Junhua |
College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou , China |
| JIANG Haitao |
College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou , China |
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| Abstract: |
| The work aims to design a dry gas seal end face structure with bi-directional rotation characteristics and favorable opening performance, and derive a new groove structure through optimization of the T-groove. The flow field characteristics and steady-state performance parameters of the classical T-groove and the derived groove were compared using finite element software. The influence of different parameters on the steady-state performance of the dry gas seals was also investigated to reveal the sealing mechanism of the derivative groove. Above all, the derived groove type had a higher opening force compared with the classical T-groove, resulting in increased leakage rate. The steady-state performance parameters of both groove types increased linearly with the working condition parameters, and the difference between the two types gradually widened, with a minimum difference of 6.6%. However, as the groove depth increased, the difference in leakage rate decreased. To improve the leakage control function of the derivative groove, the groove depth should be greater than 5 μm. The derived groove with a flow-inducing slot structure demonstrated better steady-state performance in the order of:divergent > straight > convergent. But the difference in values was small, which was up to 1.2%, under selected conditions. The derived groove exhibits a more pronounced dynamic pressure effect and significantly improved opening performance compared with the classical T-groove. Additionally, opening different forms of derivative groove can change the flow characteristics and sealing performance of the gas film. |
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