Magnetic fluid seal with centering of bearing and shaft by...

F - Mech Eng,Light,Heat,Weapons – 16 – C

Patent

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Details

F16C 23/06 (2006.01) F16C 35/073 (2006.01) F16J 15/43 (2006.01)

Patent

CA 2739789

The present disclosure describes a magnetic fluid sealing device (10) having a shaft (20) centered with respect to a magnetic structure (35) and rolling element bearing (50), as well as a method for centering the shaft in the device. A compressible ring (70) located in a groove on the shaft is used to partially fill the gap between the shaft and the rolling element bearing and to make contact with the rolling element bearing. The compressible ring (70) aligns and centers the shaft with the rolling element bearing (50). A liquid locking material (75) is added to the gap and hardened to couple the shaft and compressible ring to the rolling element bearing. An alternative self-alignment mechanism is also disclosed.

La présente invention porte sur un dispositif d'étanchéité magnétique (10) ayant un arbre (20) centré par rapport à une structure magnétique (35) et un palier à roulement (50), ainsi que sur un procédé pour le centrage de l'arbre dans le dispositif. Un anneau compressible (70), situé dans une rainure sur l'arbre, est utilisé pour remplir partiellement l'espace entre l'arbre et le palier à roulement et pour venir en contact avec le palier à roulement. L'anneau compressible (70) aligne et centre l'arbre avec le palier à roulement (50). Un matériau de verrouillage liquide (75) est ajouté à l'espace et amené à durcir pour coupler l'arbre et l'anneau compressible au palier à roulement. L'invention porte également sur une variante de mécanisme d'auto-alignement.

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