| 摘要 |
A roller bearing 10 wherein a predetermined equidistant angular spacing δ2 of the rolling elements 12 is maintained by a cage 14, and at least two sensors 16, 16, for example strain gauges, attached to one of the bearing rings 10a, 10b at different predetermined angular locations, each generate a signal having one component with a frequency of the rolling elements passing by the sensor, the angular locations of the sensors being chosen such that the phase angles of said signal components are different. The angular spacing δ1 between the sensors is preferably chosen such that said signal components have opposing phase angles. Preferably a shock load acting on the bearing is detected based on the sum of the signals. Also claimed is a wind turbine comprising the bearing and a method for monitoring a wind turbine. The invention provides a reliable way of detecting shock or transient loads on a wind turbine. |
