| 摘要 |
A bearing assembly for mounting on a journal at the end of a shaft employs a seal wear ring disposed between the backing ring and the end face of the axially inwardly directed bearing cone, with the outer cylindrical surface of the seal wear ring cooperating with a resilient sealing element for sealing the bearing. The inner diameter of the seal wear ring is greater than the diameter of the shaft journal to provide a clearance there between along the full length of the wear ring. Counterbores are provided in an outwardly directed surface of the backing ring and in the axially inwardly directed end face of the bearing cone, with the counterbores in the backing ring and bearing cone being dimensioned to provide an interference fit sufficient to provide a substantial radially compressive load in the ends of the seal wear ring upon assembly of the bearing. The seal wear ring may include an annular spacer ring of a dense, dimensionally stable synthetic resin material fitted within an annular recess on its inner surface, with the spacer ring having an internal diameter slightly less than the external diameter of the shaft journal and an outer diameter slightly greater than the inner diameter of the groove whereby when installed on the shaft journal, the spacer ring is under a radially compressive load. |
