Turbomolecular pump with improved bearing assembly

Details Turbomolecular pump with improved bearing assembly Turbomolecular pump with improved bearing assembly

1986-12-15

1989-02-21

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

384399, 384115, F04D 2904

Patent

active

048060755

ABSTRACT:
A single-ended turbomolecular vacuum pump operable in the free molecular flow pressure range having an improved bearing assembly located between the motor and the pump rotor discs is disclosed. The improved bearing assembly which is of the "plain" or "sleeve" liquid lubricated type with the bearing surfaces has a relatively high ratio of journal diameter to bearing axial length and includes lubricant ports radially disposed about both the centers of the bearing and the journal. The improved bearing assembly is characterized by improved heat transmission capabilities, high tolerance for misalignment, long life and significant reduction of pump vibration.

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