NTN bearing after installation, in order to check for installation is correct, want to undertake operation inspection. Small machine can rotate by hand to confirm whether it rotate smoothly. Check for foreign projects, scars and creasing and cause operation not free, because of installation is bad, the installation seat processing bad and produce torque is not stable, because clearance is too small, installation error, seal and cause excessive torque friction, and so on. If there is no exception may start power operation. Large mechanical can't manual rotation, so start immediately cut off after no-load power, mechanical idling, examined for vibration and noise, rotating parts if there is contact, and so on, make sure no abnormalities, into power operation. Dynamic operation, and low no-load from beginning, slowly, to improve conditions for the rating of the operation. The test run in to check the matters, whether to have abnormal sound, roller bearing the change of the temperature of the lubricants, leakage or color change etc. If find unusual, shall be immediately suspend operation, and check the mechanic and, when necessary, to dismantle the bearing inspection.
Temperature, general but according to the external temperature speculate that the bearing. But use of oil hole NTN bearing outer ring directly measuring the temperature more accurate. Bearing temperature, from the operation began gradually raised, usually 1 ~ 2 hours temperature stability. If roller bearing installation is bad, the temperature will rise sharply, the abnormal high temperature. The reason such as lubricants too much, bearing clearance is too small, installation bad, sealing device too friction. High speed rotating occasions, structure, lubricating the choice of the ways of error, etc is also the cause.
1) bearing kerosene to wash, the pressure into the housing, the roller bearing outer ring to fill in the shell number three fat to two-thirds full lithium base, with cleaning evenly daub, mount NTN bearing gland, with add besmear bolt against pine glue the bolt of pressure bearing gland;
2) bearing for internal and external set can be separate cylindrical roller bearing, should bearings inside the axis and to set in place;
3) will be installed in the bearing on the cabinet, such as a grease note oil hole, must aim the place. Use plus besmear bolt against pine glue the bolt of pressure housing;
4) installed in an eccentric block inside and outside the axis and reach the designated position, having shaft key should be the key into the keyway axis in the pack again an eccentric block, will shaft block circle with installed in the axis;
5) tight fixed an eccentric block the bolt, turn the adjustable eccentric piece, make its reach to unload before Angle position and screw down the bolt. Above after the completion of the assembly, the axis due and certain axial string move;
6) vibration motor at the ends of the cover, with screw fastening.
Import bearings for vibration motor installations, and other aspects of the effect of performance has certain change, and from different angles to consider in form of certain change effect, slowly for all aspects of installation also had some knowledge.
Use factor is mainly refers to installation and adjustment, and use the maintenance, the maintenance and repair, etc is in accordance with the technical requirements. Installation conditions is one of the important factors to use factors, NTN bearing often because of installation does not appropriate and lead to a complete set of roller bearings between the parts of the stress state change, bearing in a normal state not work and earlier failure. According to the bearing installation, operation and maintenance, the maintenance requirements, to the working NTN bearing are under load, speed, working temperature, vibration and noise and lubrication condition monitoring and inspection, abnormal immediately find reason and adjustment, make it back to normal. In addition, the quality of grease and the surrounding media analysis inspection, the atmosphere is very important also.
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