Bearing device for high speed rotary shaft

Details Bearing device for high speed rotary shaft Bearing device for high speed rotary shaft

1990-03-16

1991-12-31

Look, Edward K.

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

Plural diverse condition responsive

415 34, 415111, 415229, 384 99, 384448, F01D 1900, F16C 2700

Patent

active

050767550

ABSTRACT:
This invention discloses a bearing device for a high speed rotary shaft comprising a functional bearing disposed on a shaft which is supported rotatably on a housing by a pair of bearings, and capable of supporting rotatably the shaft, a rotation sensor for detecting the revolution of the shaft and a controller for changing the functional bearing to a shaft supporting state in response to a rotation detection signal from the rotation sensor representing that the number of revolution of the shaft is above a predetermined number of revolution. When the shaft rotates at a low speed, the functional bearing is set to a free state and the shaft is supported at two points on the housing by the pair of bearings alone. When the shaft rotates at a high speed, the functional bearing is operated so that the shaft is supported at three points on the housing to prevent the occurrence of deflection of the shaft.

REFERENCES:
patent: 2571802 (1951-10-01), Wilfley et al.
patent: 2961277 (1960-11-01), Sternlicht
patent: 3124395 (1964-03-01), Sternlicht
patent: 3688504 (1972-09-01), Hutchinson et al.
patent: 3963283 (1976-06-01), De Feo et al.
patent: 4422779 (1983-12-01), Hamaekers et al.
patent: 4626111 (1986-12-01), Swasey et al.
patent: 4781525 (1988-11-01), Hubbard et al.
patent: 4915510 (1990-04-01), Arvidsson

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