Multi-row slewing bearings, in particular axial-radial bearings for main bearing of the rotor shaft of a wind turbine

摘要

The invention relates to an axial-radial bearing (1) for main bearing of the rotor shaft (2) of a wind turbine, consisting essentially of a vertically arranged annular outer disc (3), a coaxial with said outer disc (3) arranged inner ring (4) and two axially on both sides in addition to the outer disc (3) arranged annular wave plates (5, 6), wherein between the two wave discs (5, 6) and the outer disc (3) at least one row (7, 8) by a respective bearing cage (9, 10) in at uniform intervals held rolling elements (11, 12) unrolls and a first and a second rolling bearing (13, 14) for receiving axial forces, while between the outer disc (3) and the inner ring (4) at least one further row (15) optionally by a further bearing cage (16) is held at uniform intervals held rolling elements (17) and forms a third roller bearing (18) for receiving radial forces. According to the invention, the two rolling bearings (13, 14) are formed either by two tapered roller bearings for receiving axial forces whose rolling elements (11, 12) designed as tapered rollers are directed with their smaller end faces (19, 20) respectively to the bearing longitudinal axis (21), or they are alternatively formed by a double-row angular contact ball bearings or by two axial ball bearings.