Magnetic fluid seal with precise control of fluid volume at...

Details Magnetic fluid seal with precise control of fluid volume at... Magnetic fluid seal with precise control of fluid volume at...

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/43 (2006.01)

Patent

CA 2703013

A magnetic fluid seal includes a pole ring having an inner diameter, a rotatable shaft having an outer diameter, the rotatable shaft configured to extend along the inner diameter of the pole ring between an atmosphere side and vacuum side, at least one magnet coupled to the pole ring, the at least one magnet configured to emit a magnetic field having a strength and a shape, and grooves formed on either the inner diameter of the pole ring or the outer diameter of the shaft, the grooves capable of containing ferromagnetic fluid. The ferromagnetic fluid contained the grooves varies so as to improve the performance of the magnetic fluid seal.

L'invention porte sur un joint d'étanchéité magnétique comportant un anneau polaire présentant un diamètre interne, un arbre rotatif présentant un diamètre externe, l'arbre rotatif étant configuré pour s'étendre le long du diamètre interne de l'anneau polaire entre un côté atmosphérique et un côté vide, au moins un aimant couplé à l'anneau polaire, le ou les aimants étant configurés pour émettre un champ magnétique présentant une intensité et une forme, et des rainures formées soit sur le diamètre interne de l'anneau polaire, soit sur le diamètre externe de l'arbre, les rainures étant capables de contenir un fluide ferromagnétique. Le fluide ferromagnétique contenu dans les rainures varie de façon à améliorer la performance du joint d'étanchéité magnétique.

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