| 摘要 |
PROBLEM TO BE SOLVED: To provide a failure detection device and method for a blade bearing, which accurately detects a failure of the blade bearing of a wind power generating device.SOLUTION: The failure detection device for the blade bearing which turnably supports the blades of the wind power generating device on a rotor head includes a sensor 160 for detecting the content condition of metal powder in lubricant which lubricates the rolling elements of the blade bearing, and a failure detecting part 170 for detecting a failure of the blade bearing in accordance with a change in the output of the sensor 160. Preferably, the lubricant is grease, and the sensor 160 includes a sensor for detecting the permeability of light into the grease. The failure detecting part 170 determines a degree of an increase of the metal powder in accordance with a change in the permeability of light into the grease. |
