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1, fault analysis: round-leaf with adapter sleeve and bearing housings on either side fixation combined with. Re-test free-end bearing high-temperature and vibration of high value failure, opened the INA bearings cover, manual slow Rotary fan, found in the hinge of a particular position of bearing rollers, in the non-scrolling as in loading area. so high can determine bearing clearance operation changes and installation clearance may not be sufficient. Measured that the bearing internal clearance is only 0.04mm, turning uranium eccentric 0.08mm; because of the left and right bearing span, hinge installation angle of deflection or bearing to avoid errors is more difficult and, therefore, large wind turbine using spherical roller bearings can be adjusted automatically on the heart. But when the bearing internal clearance is insufficient. bearing internal rolling because of space limitations, its automatic effect on heart function, vibration will increase. Bearing internal gap with tie tight degrees of increases and reduces, cannot formed lubrication song film, dang INA bearing running gap due to temperature rose and drop for zero, if bearing run produced of heat still is greater than Yat bulk of heat Shi, bearing temperature that will fast climb, then, as not instant downtime, bearing will burn loss, bearing within ring and axis of tie had tight is this cases in the bearing running exception high temperature of causes.
2, troubleshooting: when to step down adapter sleeve, realignment of shaft and inner ring combined with tight, replace the INA bearing clearance after taking 0.10MM. Installation is complete restart the fan again, bearing vibration values and operation temperature is back to normal.
Bearing internal clearance is too small or poor mechanical design and manufacture of precision, are an extension of high bearing operating temperature, to facilitate the installation of wind turbine equipment; overhaul and maintenance. General design adapter sleeve bearings on cone Kong Neihuan tie bearing housings, but also easy to Setup on the negligence issue. especially appropriate clearance of apoptosis. Bearing internal clearance is too small. operation sharp temperature rise: bearing inner ring tapered bore and adapter sleeve tie too loose, INA bearing failure in the near future due to loose the mating surfaces burned.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 32313U NTN | 65 | 140 | 48 |
| 30322U NTN | 110 | 240 | 50 |