Performance Analyses of the Spiral Groove Dry Gas Seal with Inner Annular Groove

Abstract:

In order to improve the performance of the spiral groove dry gas seal (S-DGS), the spiral groove dry gas seal with an inner annular groove (AS-DGS) was invented. Based on the narrow groove theory, the sealing performance parameters of the AS-DGS were gained by using approximate analytical method to solve the gas film pressure control equations, and the results were compared with those of the common S-DGS. The results show that, in the given operating conditions, the opening force of AS-DGS is smaller than that of the S-DGS with the difference less than 0.5%, and the film stiffness is larger than that of the common S-DGS with the difference less than 5% in the case of low-speed or high-pressure operation, but the leakage is a little larger.

• Periodical: Applied Mechanics and Materials (Volume 420)
• Pages: 51-55
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.420.51
• Online since: September 2013
• Authors: Ying Li, Peng Yun Song, Heng Jie Xu
• Keywords: Analytical Method, Dry Gas Seal, Incremental Ratio, Sealing Performance

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