| 摘要 |
A double row tapered roller bearing for transferring axial loads includes an inner race having two tapered raceways, an outer race in the form of two rings, each having a tapered raceway presented toward a tapered raceways of the inner race, and tapered rollers arranged in two rows between the raceways of the inner and outer races, with the large ends for the rollers of the two rows being presented toward each other. The bearing fits into a housing with a loose fit between the rings of the outer race and the housing. Two seals, which are fitted to the rings of the outer race, isolate the interior of the bearing from the surrounding environment. Each seal includes a case that fits around one of the rings of the outer race and along the end of that ring, all such that the ring can shift axially with respect to the seal case. In addition, each seal has a flexible seal element which establishes a static fluid barrier with the confronting wall of the housing and another flexible seal element which establishes a dynamic fluid barrier with the inner race. Each outer ring carries springs which bear against the case of the seal carried by the element and urge the flexible seal element against the confronting wall of the housing while seating the rollers within it against the raceways along which it rolls, thus imparting a preload to the bearing.
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