INA overall eccentric bearing noise elimination method

The metallurgical quality of bearing materials used to be a major factor affecting the early failure of INA bearings. With the improvement of metallurgical technology (such as vacuum degassing of bearing steel), the quality of raw materials is improved. The proportion of raw material quality factors in the overall eccentric bearing failure analysis has dropped significantly, but it is still one of the main factors affecting bearing failure. The proper selection of materials is still a factor that must be considered in bearing failure analysis.
The main task of bearing failure analysis is to find out the main factors causing the failure of INA bearing based on a large amount of background materials, analysis data and failure modes, so as to propose improvement measures in a targeted manner and extend the service life of spherical roller bearings to avoid The bearing has a sudden early failure.
The vibration of the bearing has a significant effect on the failure of the bearing. For example: spalling, indentation, corrosion, cracks, wear, etc. will be reflected in the INA bearing vibration detection. Therefore, by using a special overall eccentric bearing vibration measuring device (frequency analyzer and vibration) The instrument can measure the magnitude of the vibration. The frequency of the vibration can be inferred. The measured value of the abnormal vibration is different depending on the premise of the INA bearing or the installation position of the sensor. Therefore, it is necessary to analyze and compare the measurement values ​​of each machine in advance. After determining the judgment scale.
1. Reason: The overall eccentric bearing has low precision. The method selects the bearing with the specified accuracy grade.
2. Reason: The spindle is bent or the hole of the box is different. The method is to repair the spindle or the box.
3, the reason: the belt is too tight method: adjust the belt to make the elastic appropriate
4. Reason: Poor lubrication method: select the lubricating material of the specified grade and clean it properly.
5, the reason: low assembly quality method: improve assembly quality
6, reason: bearing inner casing running method: replacement of bearings and related wear parts
7. The axial force is too large. Method: Clean and adjust the clearance of the sealing ring. Between 0.2 and 0.3mm, correct the balance of the impeller and verify the static balance.
8, bearing damage method: replace INA bearing

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INA forklift bearing abnormal condition daily simple maintenance

Contact fatigue failure refers to the failure of the INA bearing working surface to be affected by alternating stress. Contact fatigue spalling occurs on the working surface of the forklift bearing, often accompanied by fatigue cracks, first from the maximum alternating shear stress below the contact surface, and then extended to the surface to form different peeling shapes, such as pitting or pitting , peeling off into small pieces called shallow peeling. Due to the gradual enlargement of the exfoliation surface, it tends to expand deeper and form deep exfoliation. Deep exfoliation is the source of fatigue in contact fatigue failure.
Wear failure refers to the failure of the relative sliding friction between the surfaces resulting in the continuous wear of the metal on the working surface. Continued wear and tear will cause gradual damage to the INA bearing parts and ultimately lead to loss of dimensional accuracy of the forklift bearings and other related problems. The wear of the crucible may affect the shape change. The increase of the clearance and the change of the surface of the working surface may affect the lubricant or cause the pollution to a certain extent, resulting in complete loss of the lubrication function, thus causing the bearing to lose the rotation precision or even the normal operation.
1. When the bearing is running for a certain period of time (or maintenance period), remove all the bearings;
2. Soak the bearings with diesel or kerosene for cleaning. If there are technical conditions, it is best to open the sealing cover for cleaning;
3, dry cleaning oil after cleaning, visual inspection for damage;
4. Use a wooden rod with a diameter of about 150 mm and an inner diameter of the INA bearing (preferably a hollow tube), and fix one bearing at one end;
5. While rotating the bearing by hand, the other end of the wooden rod (wood tube) is placed on the ear or the audio amplifier microphone to hear the bearing rotation noise;
6. After the bearing is fixed, move the wooden rod horizontally to check whether the bearing is loose or not;
7. Forklift bearings with severe looseness, excessive rotating noise and serious defects should be eliminated and replaced by the same model;
8. Take a bucket and melt the appropriate amount of grease (high-quality yellow dry oil) with a simmer (not overheated). Place the tested bearings in a bucket and soak them in a bubble-free overflow.
Remove the bearing before cooling the grease and reduce the amount of residual grease. After the grease is cooled, the INA bearing is taken out and the amount of residual grease is large. Determine the amount of grease remaining as needed.
9. Wipe the grease on the outside of the bearing with a soft cloth or toilet paper to assemble the forklift bearing to the pulley. The maintenance work is over.

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