High temperature caused by the quality of spherical roller bearings

In the assembly process, the quality of the bearing material can also be checked, so as to identify the quality of the bearing. After the inner ring of the bearing is assembled on the shaft, under normal operation conditions, if the bearing material is unqualified, due to the deformation of the inner ring, the deformation of the bracket or the change of the clearance will cause the spherical roller bearing to rotate inflexibly or become unstable. Rolling elements fall off, etc. In addition, the hardness value of the bearing is 60 ~ 65HRC, higher or lower than this value is unqualified. When testing the bearing hardness, the inspection point should be selected on the side of the inner ring or outer ring to avoid damage to the bearing. During the test, use a file with a force of about 10N or use a hacksaw blade with a force of about 5N to file or saw the outer ring and inner ring of the bearing. If there is a "squeak, squeak" sound and there is no swarf, only inconspicuous remains are left. The file or saw marks are of sufficient hardness, and if the swarf can be filed or sawed off, the hardness of the material does not meet the requirements. In addition, before carrying out the hardness test, it should be negotiated with the supplier first, and the supplier should carry out the test when the supplier expresses that "the hardness meets the standard requirements, and can be returned if it does not meet the requirements".

1. The installation position of the spherical roller bearing is incorrect, which will cause a large axial force between the end face of the ball and the inner race and outer race stop of the bearing housing, resulting in overheating of the bearing.

2. The bearings used are of the specified precision grades.

3. The solution to the heat caused by the bending of the bearing spindle in use or the non-concentricity of the box hole is to repair the spindle

4. the solution to the heat caused by the bearing belt is too tight is to adjust the belt to make the tightness appropriate.

5. The solution to the heat caused by poor lubrication is to select the specified grade of lubricating materials and clean them properly.

6. The solution to the heat caused by low assembly quality is to improve the assembly quality.

7. The solution to the heat caused by the running ring of the inner shell of the rolling bearing is to replace the bearing and related wear parts, correct the diameter of the impeller balance hole and check the static balance value

8. The solution to the heat caused by too much axial force is to clean and adjust the clearance requirements of the sealing ring

9. the solution to the heat caused by the damage of the rolling bearing is to replace the bearing. When we are using spherical roller bearings, if we find that the temperature is very high, we should quickly stop the operation of the equipment, then find out the reason, and deal with it according to the solutions provided above, but it may be caused by the heating of the bearing. The reasons are different, so the solutions are also different, so it is still necessary to deal with specific situations and complete them with the help of technical personnel.