Vacuum pump having emergency bearings

Details Vacuum pump having emergency bearings Vacuum pump having emergency bearings

1990-08-16

1991-10-22

Kwon, John T.

Rotary kinetic fluid motors or pumps

Smooth runner surface for working fluid frictional contact

4174234, 41742312, F01D 136

Patent

active

050590928

ABSTRACT:
A vacuum pump has a pump housing, magnetic bearings mounted in the housing, a rotary assembly including a pump rotor disposed in the housing and supported for rotation by the magnetic bearings and two spaced emergency bearings supporting the pump rotor when it deviates by a predetermined extent from a desired position. The rotary assembly has a center of gravity which is situated between the emergency bearings and which is spaced approximately equally therefrom.

REFERENCES:
patent: 4036565 (1977-07-01), Becker
patent: 4541772 (1985-09-01), Becker

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