Hydrostatic bearing utilizing a ferromagnetic fluid

Details Hydrostatic bearing utilizing a ferromagnetic fluid Hydrostatic bearing utilizing a ferromagnetic fluid

1987-12-10

1989-02-28

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384133, 415 10, 417 50, 417322, F16C 3206, F16C 3374, F04B 1700, H02K 4400

Patent

active

048093548

ABSTRACT:
A hydrostatic bearing system utilizing ferromagnetic fluid exclusively as working fluid including that used for sealing for preventing the ferromagnetic fluid itself from escaping outside the bearing. In order to accomplish the objects and function, the hydrostatic bearing system proposed here comprises, in addition to ordinary parts or components used in the conventional type, a fluid chamber for containing the ferromagnetic fluid as a working fluid, a circulating passage, at least a recovery groove for collecting the fluid squeezed out of the fluid chamber, a magnetic seal to prevent the fluid from escaping and at least an impelling device to forcibly deliver the ferromagnetic fluid at a predetermined pressure and flow rate. The impelling device can be constructed utilizing a shifting magnetic field, or multilayered rings fabricated of piezo-electric components, or of impelling cylinders having axially lengthenee or reduced in length.

REFERENCES:
patent: 3439961 (1969-04-01), Stiles
patent: 3635532 (1972-01-01), Zerbola
patent: 3726574 (1973-04-01), Tuffias et al.
patent: 4254961 (1981-03-01), Fersht et al.
patent: 4432699 (1984-02-01), Beckman et al.
patent: 4630943 (1986-12-01), Stahl et al.
Magazine Article from Machine Design dated 3-28-68 entitled "Magnetic-Fluid Seals" by Rosensweig et al.

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