1, Failure Analysis: on both sides of the vane and bearing with adapter sleeve bearing fixed with.Re-test on the free end of the bearing high temperature, high vibration value of the fault, open the bearing turns shelters, manual slow rotating fan, found in a particular position of the shaft bearing roller, scroll also in the non-load situation.This ensures that changes in the bearing running clearance and high clearances may be insufficient. Was measured, the bearing internal clearance is only 0.04mm the eccentric turn uranium up to 0.08mm; around the bearing span, shaft deflection or bearing mounting angle error is difficult to avoid, so large fan automatically heart the adjusted spherical roller bearings. However, when the bearing internal clearance within the bearing scroll member due to the restriction of the movement space, automatically the affected heart function, but elevated vibration value. Bearing internal clearance with with increased tightness decreases, unable to form a lubricating song film when the bearing running clearance falls to zero, if the heat generated by the bearing operating temperature rise is still greater than the heat of the oven, the bearing temperature will quickly climb, then, if not immediately stop, bearing will eventually burning, the bearing inner ring and the shaft with tight bearings running unusually high temperatures cause in this case.
Remedy: processing, to step down adapter sleeve, re-adjust the shaft and the inner ring with the tightness, replace the bearing gap of 0.10mm. Re-installed restart the fan, bearing vibration value and operating temperature returned to normal.
 
 
Bearing internal clearance is too small or poor mechanical design and manufacture of precision are ext bearing operating temperature is the main cause of high, for the convenience of the installation of the wind turbine equipment; overhaul and maintenance. General in the design of multi-use adapter sleeve bearing cone hole ring with the bearing block bearing, however, also easy because of the negligence of the installer. adjustment is especially appropriate clearance. Bearing internal clearance is too small. Rapid rise in operating temperature: the bearing inner ring tapered bore and adapter sleeve fit is too loose, easy bearing failure in the short term due to the mating surface loose burning.
 



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