Radial antifriction bearing i.e. swivel-joint roller bearing, for use as floating bearing in wind turbine, has rows of rolling bodies arranged between with outer ring and inner ring, where annular groove is embedded in surface of outer ring

摘要

The bearing (1) has two rows of rolling bodies (4) arranged between with an outer ring (2) and an inner ring (3). A circulating annular groove (12) is centrically embedded in a radially outer lateral surface (11) of the outer ring. A helical screw groove (17) is formed in the radially outer lateral surface, and comprises an upward gradient with a pitch angle that is varied over axial width of the outer ring. Two boreholes (16) are radially guided into an interior part of the bearing by the annular groove. The helical screw groove cuts side walls (13, 14) of the annular groove.