보일러 급수 펌프용 미케니컬 페이스 실의 정특성 해석
Static Characteristic Analysis of Mechanical Face Seal Used for Boiler Feedwater Pump
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초록
Mechanical face seal installed in boiler feedwater pump prevents leakage of working fluid using thin fluid film between stator and rotor. If the leakage of working fluid exceeds the allowable volume, serious malfunction of boiler feedwater pump will be happen. The thinner fluid film exists between stator and rotor, the less working fluid leaks out. However, if the thickness of fluid film is not enough, the wear of seal face will be increased. And it causes the decrease in life of mechanical face seal. Therefore appropriate design is necessary to maximize the performance and life of mechanical face seal. In this study, numerical analysis using finite volume method was conducted to investigate the static characteristics of wavy mechanical face seals which have 4 different wavy surface profiles on rotor. As a result, opening force, leakage volume of working fluid and friction torque were obtained. For the same minimum film thickness, the static characteristics of mechanical face seal were affected by the wavy surface profile which can change the thickness of working fluid film and pressure distribution.
Abstract
Mechanical face seal installed in boiler feedwater pump prevents leakage of working fluid using thin fluid film between stator and rotor. If the leakage of working fluid exceeds the allowable volume, serious malfunction of boiler feedwater pump will be happen. The thinner fluid film exists between stator and rotor, the less working fluid leaks out. However, if the thickness of fluid film is not enough, the wear of seal face will be increased. And it causes the decrease in life of mechanical face seal. Therefore appropriate design is necessary to maximize the performance and life of mechanical face seal. In this study, numerical analysis using finite volume method was conducted to investigate the static characteristics of wavy mechanical face seals which have 4 different wavy surface profiles on rotor. As a result, opening force, leakage volume of working fluid and friction torque were obtained. For the same minimum film thickness, the static characteristics of mechanical face seal were affected by the wavy surface profile which can change the thickness of working fluid film and pressure distribution.
참고문헌 (6)
- Lebeck, A. O, "Principles and Design of Mechanical Face Seal" (1991), A Wiley-Interscience Publication
- Miller, B. A, "Numerical Formulation for the Dynamic Analysis of Spiral-Grooved Gas Face Seals", Journal of Tribology, 123(2), pp.359~403 (2001)
- Salant, R. F, "Stiffness and Leakage in Spiral Groove Upstream Pumping Mechanical Seals", Tribology Transactions, 36(1), pp.55~60 (1993)
- Zirkelback, N, "Parametric Study of Spiral Groove Gas Face Seals", Tribology Transactions, 43(2), pp.337~343 (2000)
- 이안성, "깊은 직선 홈 미케니컬 페이스 시일의 윤활 성능해석", 한국윤활학회지, 19(6), pp.311~320 (2003), 한국윤활학회
- Young, L. A, "The Design and Testing of a Wavy-tilt-dam Mechanical Face Seal", Lubrication Engineering, 45(5), pp.322~329 (2000)