Rotary mechanism with axial bearings

Details Rotary mechanism with axial bearings Rotary mechanism with axial bearings

1980-01-04

1982-06-01

Footland, Lenard A.

Cutlery

308 9, 308170, F16C 3906

Patent

active

043324282

ABSTRACT:
A rotary mechanism with axial bearings comprising a shaft having at least one free end, a housing rotatably fitted over said shaft with a lubricant being contained in the space defined between them, a first axial position control means for controlling the relative axial position between the shaft and the housing, the first axial position control means comprising a thrust axial bearing, which is referred to as "the micro-groove bearing" in the specification, comprising a projection extended from the free end of the shaft or its opposing bearing surface of the housing coaxially of the shaft and radial grooves formed in the face of the free end of the shaft or its opposing bearing surface of the housing in such a way that upon relative rotation between the shaft and housing, the pressure may be built-up in the oil film therebetween, whereby they may be separated from each other; and a second axial position control means which may buildup the pressure or may exert the force in such a direction that the clearance between the projection and its opposing bearing surface of the "micro-groove bearing" may be reduced or the free end of the shaft and the opposing surface of housing may be moved toward each other. The shaft or housing may be started and driven at low torques and the wear problems of bearings may be eliminated. Furthermore the relative position between the shaft and housing may be accurately maintained within an allowable tolerance range regardless of the position of the rotary mechanism.

REFERENCES:
patent: 4209207 (1980-06-01), Schippers et al.
patent: 4210371 (1980-07-01), Gerkema et al.
patent: 4220379 (1980-09-01), Pimiskern et al.

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