| 摘要 |
1487579 Roller bearings FMC CORP 12 Nov 1974 [12 Dec 1973] 48806/74 Heading F2A A roller for incorporation in a spherical roller bearing assembly comprises a convexly-curved contact surface having a central portion MN (Fig. 6) of width P which is 0À50-0À75 times the length L, and end portions WM and NZ of width E, the radius of curvature of the end portions being smaller than that of the central portion. The radius of curvature of MN is suitably the same as that of an inner ring raceway in cross-section. The end portions WM and NZ may have a compound radius of curvature which diminishes from the boundary with the central portion to the ends of the roller. A double row, self-aligning roller bearing having two outer rings each with a concave raceway and a single inner ring having two concave raceways is described. The clearance between the end portions of the roller and each raceway, when unloaded, is preferably 0À90-1À75 times the combined elastic deformation of the roller and inner ring under maximum load. |
