The Timken Company

Bruce C Burner

Gerald P Fox

Michael D Allega

A bearing system (A) that supports a shaft () in a housing () includes two single row tapered roller bearings () mounted in opposition. One of the bearings () compensates for thermal variations that would otherwise produce excessive preload in the system. It has a conventional cup () in the housing and tapered rollers () arranged in a single row along the raceway () of the cup. It also has a compensating assembly () on the shaft, and it includes a ribless cone () having a raceway () around which the rollers are organized, an axially displaceable rib ring () for positioning the rollers, a spring () for urging the rib ring against a stop surface () on the cone, and a compensating ring () formed from a material having a high coefficient of thermal expansion for displacing the rib ring against the force exerted by the spring when the temperature of the compensating assembly exceeds a prescribed set point temperature so as to reduce preload in the bearing system.

Tapered roller bearing with displaceable rib

A spherical outer diameter tapered roller bearing pillow block system () for supporting the rotating main shaft of a wind turbine. The bearing system is configured with a unitized construction and factory set preload bearing settings to facilitate installation and setup. A spherical outer diameter surface () is formed on the outer race () of a tapered roller bearing assembly disposed about the rotating main shaft of the wind turbine. The bearing assembly is secured to a stationary support structure of the wind turbine through a pillow block housing assembly () providing a matching spherical housing seat () to form a ball and socket interface between the tapered roller bearing assembly () and the pillow block housing assembly (). The ball and socket interface accommodates static and dynamic misalignments between the wind turbine main shaft and the supporting structure, while the bearing assembly () accommodates radial and axial loads.

Pillow block housing with tapered roller bearings

A bearing assembly (A-H) enables one member () to rotate relative to another member () about an axis (X). It includes a bearing () having an inner race () on one of the members, an outer race () in the other member, and rolling elements () between raceways on the two races. A seal () excludes contaminants from the interior of the bearing, and it includes a wear ring () carried by an extension () on the outer race beyond the raceway of that race, a contacting wear ring () carried by the member on which the inner race is located or else by a can () that is fitted to the inner race. The seal also includes backing elements () for supporting the wear rings on that which carries them, and in most instances the backing elements exert a biasing force on the wear rings to maintain them in contact, so that they establish a dynamic fluid barrier. The backing elements may include O-rings (), polymer connecting segments () or springs () and a membrane ().

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Alliance, OH, United States of America

Bruce C Burner