Typical symptoms of impending failure of full complement cylindrical roller bearings

1) Dirt, foreign matter, sand or other contaminants enter the box. Countermeasures: Clean the full complement cylindrical roller bearing housing and replace with a new oil seal. 2) Water, acid, paint or other corrosive substances enter the bearing housing. Countermeasure: Install a protective dust cover and improve the oil seal. 3) The inner hole of the bearing box is not round, twisted and deformed, and the supporting surface is not flat. Countermeasures: Check the full complement cylindrical roller bearing housing, adjust the support surface and adjust the shim. 4) The shaft diameter is small or the adapter sleeve is not locked. Countermeasures: Detect the shaft diameter, select the appropriate amount of fit, and re-lock the adapter sleeve. 5) Unbalanced load, large clearance between box holes, the outer ring slips in the box hole. Countermeasure: Replace the bearing housing with the hole diameter that meets the design requirements. 6) Two or more bearings are coupled, resulting in linear deviation and angular deviation of the axis. Countermeasures: Readjust the shims so that the shafts are coupled on the same straight line. 7) Improper installation, hit the bearing directly with a hammer. 8) The clearance of the full complement cylindrical roller bearing is too large. 9) The device vibrates. 1) Brief description of the accident: The temperature of the motor full complement cylindrical roller bearing rises, and the high temperature alarms. 2) Reason analysis The reasons for the overheating of motor bearings are as follows: bearing damage; too much lubricating oil, too little or poor oil quality; full complement cylindrical roller bearing and shaft are too loose or too tight; full complement cylindrical roller bearing The roller bearing and the end cover are too loose or too tight; the oil ring of the sliding bearing rolls or rotates slowly; the end covers or bearing covers on both sides of the motor are flat; the belt is too tight; the coupling is not installed properly. 3) Accident handling: check whether the oil ring is rotating, whether the oil is normal, whether the oil circuit is blocked or cut off; whether the oil volume is sufficient, whether the oil pressure is abnormal, and whether the oil temperature is normal; whether the rolling bearing is refueled too much or lacks oil; Whether the bearing cooling water is normal; whether there is abnormal noise or damage to the full complement cylindrical roller bearing. 4) Technical measures: maintenance personnel and operation personnel should strengthen the inspection of equipment, enhance their sense of responsibility, and replenish oil to the motor bearings in time.

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