Main bearing, in particular main bearing of a wind turbine and method for determining a bearing clearance of a roller bearing and wind turbine

摘要

The central warehouse (1), in particular main bearing of a wind turbine, includes a rotor (2) and a stator (4) which are mounted to each other via at least one rolling bearing (10,12). In response to a bearing clearance of the rolling bearing (10,12), two elements (2,4,12a, 12b) displaceable to each other. In order to set or monitor the bearing clearance for both assembly purposes as well as during operation, is now designed an integrated sensor unit (14,15) comprising at least one sensor (14) in one of the components (2,4, 12a, 12b) to measure a distance (a) (2,4,12a between the two components, 12b) is arranged. The sensor unit (14,15) is further adapted for determining, based the bearing play on the measured distance (a). Preferably, the sensor unit (14,15) comprises an evaluation unit (15) which determines from the measured distances (a) a preload in a negative bearing clearance.