1.Inaccurate installation

If the installation is not on the right, not only there are beads on the bearing slide, and the ball wear marks are uneven, but also produce deflection, the radial clearance on both sides of the bearing will be unequal with the gauge, and the difference is large.

why

It may be struck directly through the outer ring of the bearing with an iron hammer;The belt is pulled too tightly (between gears);Make the center line of the driving wheel and the passive wheel not parallel.When the deflection is greater than 1/1000, the bearing operating temperature will be too high, the slide path and the ball ball will be seriously worn, the rotating shaft will be bent and the end cover bolt pressing surface is not perpendicular to the bolt axis.

Correct installation method

With a steel tube sleeve with smooth end face and almost equal thickness to the bearing inner ring, the bearing is pressed on the correct position of the clean journal.Pressure into the force should be uniform, not too fierce.Then check the allowable yaw value of shaft end radial direction according to the different speed of the motor.

2.Strong vibration

When the motor core has a fault, the bearing will vibrate strongly.

why

The core is deformed by heat;Motor bearing aging;The bending deformation of the rotating shaft is large.The bolt of end cover stop loosens due to vibration;A weak foundation causes the bearing to vibrate.

Prevent method

The iron core is ground small, and the surface of the silicon steel sheet and the gap opened are soaked with silicone varnish;Replace the new bearing of the same type;Exit the rotor core to straighten the bending part of the rotating shaft;180° symmetric method is adopted.Tighten the end cover stop bolt;Reinforce the foundation and tighten the anchor bolts.

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