Turbomolecular pump with improved bearing system

Details Turbomolecular pump with improved bearing system Turbomolecular pump with improved bearing system

F - Mech Eng,Light,Heat,Weapons

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F04D 21/00 (2006.01) F04D 19/04 (2006.01) F04D 29/04 (2006.01) F16C 27/00 (2006.01) F16C 32/06 (2006.01)

Patent

CA 1240302

TURBOMOLECULAR PUMP WITH IMPROVED BEARING ASSEMBLY Gordon E. Osterstrom ABSTRACT OF THE DISCLOSURE A single ended turbomolecular vacuum pump operable in the free molecular flow pressure range having an improved bearing assembly between the motor rotor and the pump rotor discs is disclosed. The improved bearing assembly which is of the "plain" or "sleeve" liquid lubricated type has a relatively high ratio of journal diameter to bearing axial length. The improved bearing assembly is characterized by improved heat transmission capabilities, high tolerance for misalignment and long life.

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