Date: 2013-08-22

SKF pitch bearing failure measures for improvement

Electrical pitch system during pitch 3 blade cannot be synchronized because of SKF bearings have failed, the above analysis of the pitch causes of bearing failure. For these reasons the improvement measures taken:
(1) good selection of grease lubricant is the best grease for high voltage and not easily oxidize. Each bearing requires adequate grease, about 1600g. Should be modest rotation bearing in lubrication process.
(2) periodically check the bearing bolt preload hydraulic check bolt torque wrench to set torque. If the nut cannot be rotated or difference between the position of the nut before the end position from the release of 20. Within the preload is still within the description.
(3) in accordance with its instructions to properly install the bearings of tolerances on shape and stiffness that are installed meet the specifications, technical requirements for structure, and the position and force, for bearings installed for testing in a timely manner after the installation.  

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