CIESC Journal

• TRANSPORT PHENOMENA & FLUID MECHANICS • 上一篇    下一篇

螺旋槽机械密封的改进设计

周剑锋; 顾伯勤; 陈晔   

  1. Fluid Sealing and Control Laboratory, College of Mechanical and Power Engineering, Nanjing
    University of Tech-nology, Nanjing 210009, China
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-08-28 发布日期:2007-08-28
  • 通讯作者: 周剑锋

An improved design of spiral groove mechanical seal

ZHOU Jianfeng; GU Boqin; CHEN Ye   

  1. Fluid Sealing and Control Laboratory, College of Mechanical and Power Engineering, Nanjing
    University of Tech-nology, Nanjing 210009, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-08-28 Published:2007-08-28
  • Contact: ZHOU Jianfeng

摘要: The coupling effect among the flow of fluid film, the frictional heat of fluid film and the
thermal deformation of sealing rings is inherent in mechanical seals. The frictional heat
transfer analysis was carried out to optimize the geometrical parameters of the sealing
rings, such as the length, the inner radius and the outer radius. The geometrical
parameters of spiral grooves, such as the spiral angle, the end radius, the groove depth,
the ratio of the groove width to the weir width and the number of the grooves, were
optimized by regarding the maximum bearing force of fluid film as the optimization
objective with the coupling effect considered. The depth of spiral groove was designed to
gradually increase from the end radius of spiral groove to the outer radius of end face in
order to de-crease the weakening effect of thermal deformation on the hydrodynamic effect
of spiral grooves. The end faces of sealing rings were machined to form a divergent gap at
inner radius, and a parallel gap will form to reduce the leakage rate when the thermal
deformation takes place. The improved spiral groove mechanical seal possesses good heat
transfer performance and sealing ability.

关键词: spiral groove;mechanical seal;heat transfer;optimum design;bearing force;leakage rate

Abstract: The coupling effect among the flow of fluid film, the frictional heat of fluid film and the
thermal deformation of sealing rings is inherent in mechanical seals. The frictional heat
transfer analysis was carried out to optimize the geometrical parameters of the sealing
rings, such as the length, the inner radius and the outer radius. The geometrical
parameters of spiral grooves, such as the spiral angle, the end radius, the groove depth,
the ratio of the groove width to the weir width and the number of the grooves, were
optimized by regarding the maximum bearing force of fluid film as the optimization
objective with the coupling effect considered. The depth of spiral groove was designed to
gradually increase from the end radius of spiral groove to the outer radius of end face in
order to de-crease the weakening effect of thermal deformation on the hydrodynamic effect
of spiral grooves. The end faces of sealing rings were machined to form a divergent gap at
inner radius, and a parallel gap will form to reduce the leakage rate when the thermal
deformation takes place. The improved spiral groove mechanical seal possesses good heat
transfer performance and sealing ability.

Key words: spiral groove, mechanical seal, heat transfer, optimum design, bearing force, leakage rate