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A Lubrication Performance Analysis of Mechanical Face Seals Using Galerkin Finite Element Method

갤러킨 유한요소해석법을 이용한 미케니컬 페이스 실의 윤활성능해석

Choe, Byeong-Ryeol;Lee, An-Seong;Choe, Dong-Hun
최병렬;이안성;최동훈

  • Published : 2001.06.01

Abstract

A mechanical face seal is a tribo-element intended to control leakage of working fluid at the interface between a rotating shaft and its housing. Leakage of working fluid decreases drastically as the clearance of the mating seal faces gets smaller. But the very small seal clearance results in an increased reduction of seal life because of high wear and heat generation. Therefore, in the design of mechanical face seals a compromise between low leakage and acceptable seal life is important, and it presents a difficult and practical design problem. A fluid film or sealing dam geometry of the seal clearance affects seal lubrication performance very much, and thereby it is one of the main design considerations. In this study the Reynolds equation for the sealing dam of mechanical face seals is numerically analyzed, using the Galerkin finite element method, which is readily applied to various seal geometries. Film pressures of the sealing dam are analyzed, including the effects of the seal face coning and tilt. Then, lubrication performances of the seals, such as opening forces, restoring moments, leakage, and dynamic coefficients, are calculated, and they are compared to the results obtained by the narrow seal approximation.

Keywords

Mechanical Face Seal;Reynolds Equation;Gelerkin Finite Element Method;Coning;Tilt;Lubrication Performance

References

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