Backup bearings for extreme speed touch down applications

Details Backup bearings for extreme speed touch down applications Backup bearings for extreme speed touch down applications

1995-12-29

1996-12-31

Footland, Lenard A.

Bearings

Rotary bearing

Antifriction bearing

310 905, 384102, 384615, 74572, F16C 1910, F16C 3204

Patent

active

055887546

ABSTRACT:
A backup bearing for supplying backup to magnetic bearings is provided, the backup bearing comprising: an outer race disposed about the axis of a stationary shaft, the outer race mounted to a flywheel assembly for rotational movement about the axis; an inner race spaced from the outer race and disposed about the axis, the inner race being substantially stationary with respect to the axis; and a plurality of rolling elements each having a central axis with each element being spaced from the inner race and disposed between the inner and outer race for rotational movement therebetween. Rotation of the outer race causes corresponding rotation of the plurality of rolling elements such that upon contact of the rolling elements with the inner race, the speed differential between the rotating rolling elements and the substantially stationary inner race causes each rolling element contacting the inner race to accelerate about its central axis with little wear on the rolling elements due to skid damage because neither the inner race nor the outer race inertia needs to be overcome since both are always functioning at their operational speeds.

REFERENCES:
patent: 3708215 (1973-01-01), Wilcock et al.
patent: 3841173 (1974-10-01), Kraus
patent: 4480881 (1984-11-01), Fujimori
patent: 4628522 (1986-12-01), Ebersberger
patent: 4629261 (1986-12-01), Eiermann et al.
patent: 4641978 (1987-02-01), Kapich
patent: 5124605 (1992-06-01), Bitterly et al.
patent: 5231323 (1993-07-01), New
patent: 5321329 (1994-06-01), Hovorka
patent: 5398571 (1995-03-01), Lewis
patent: 5419212 (1995-05-01), Smith
"Fuel Cells and Flywheels", by G. Koprowski, Automotive Industries, Feb. 1995, pp. 136 and 138.
"UT and BMW Collaborate on Flywheel System", by Steven Ashley, Mechanical Engineering, Aug. 1994, p. 18.
"Will it fly? New Flywheel Technology Isn't Pie-In-The-Sky", by Karey McCann Ward's Auto World, Sep. 1994, p. 102.
"Automakers Move Toward New Generation Of `Greener` Vehicles", by Deborah L. Illman, C&EN, Aug. 1, 1994, pp. 8-16.
"Flywheels Put A New Spin On Electric Vehicles", by Steven Ashley, Mechanical Engineering, Oct. 1993, pp. 44-51.

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