Auxiliary bearing system

Bearings – Shim for bearing

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384102, F16C 1952

Patent

active

058104852

ABSTRACT:
This invention is directed toward a bearing system for a rotating element, and more particularly directed toward an bearing system which provides an auxiliary bearing system if the primary bearing fails. Transfer of load from the failing primary bearing to one or more auxiliary bearings is initiated by conditions generated by the failing primary bearing such as abnormal heat generation or abnormal torque impulses. Alternately, the invention can be used to prevent primary bearing failure by transferring load to the secondary bearing system if the primary bearing is overloaded. The transfer of load is completely automatic requiring no human intervention. A signal or warning is, however, emitted by the bearing system to notify that loading has been transferred to one or more auxiliary bearings. The invention is directed toward an auxiliary bearing system for tapered roller bearings used in rail cars. In railroad applications, the auxiliary bearing system allows time for the train to be safely stopped in the event of roller bearing failure, thereby significantly reducing the number of catastrophic bearing failures which often lead to hazardous and costly train derailments.

REFERENCES:
patent: 3603654 (1971-09-01), Bird
patent: 4666317 (1987-05-01), Holthoff
patent: 4726694 (1988-02-01), McFarlin
Mechanistic Aspects of Burn-Off, Robert C. Leedham and William N. Weins, Presented at ASME/IEEE Joint Railroad Conference, Apr. 1, 1992, Atlanta, GA.

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