SKF Bearing Storage Method And Assembly

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　　After the SKF bearing is installed, in order to check whether the installation is correct, it is necessary to perform a running check. Small machines can be rotated by hand to confirm whether they rotate smoothly. The inspection items include improper operation due to foreign objects, scars, and indentations, unstable torque due to poor installation and poor processing of the mounting seat, excessive torque due to too small clearance, installation errors, and seal friction, etc. Wait. If there is no abnormality, power operation can be started.

　　Large machinery cannot be rotated manually, so immediately cut off the power after no-load start, and the machine is idling. Check for vibration, noise, contact with rotating parts, etc. After confirming that there is no abnormality, enter the power operation.

　　 Power operation, starting from a low speed with no load, slowly increasing to the rated operation under the specified conditions. The items to be checked during the test run are whether there are abnormal sounds, changes in SKF bearing temperature, leakage or discoloration of lubricants, etc. If an abnormality is found, the operation should be stopped immediately, the machine should be inspected, and the bearing should be removed for inspection if necessary.

　　SKF bearing temperature can generally be estimated based on the external temperature of the bearing seat. However, it is more accurate to use the oil hole to directly measure the temperature of the outer ring of the bearing. The temperature of the bearing gradually increases from the start of operation, and usually stabilizes after 1 to 2 hours. If the bearing is installed improperly, the temperature will rise sharply, resulting in abnormally high temperature. The reasons include too much lubricant, too small bearing clearance, poor installation, and too much friction in the sealing device. In the case of high-speed rotation, the wrong choice of SKF bearing structure and lubrication method is also the reason.

　　The rotating sound of SKF bearings is checked with a stethoscope, etc., there are strong metal noises, abnormal sounds, irregular sounds, etc., indicating abnormalities. The reasons include poor lubrication, poor shaft or bearing seat accuracy, bearing damage, and foreign matter intrusion.

Common faults of SKF bearings are as follows:

1. Corrosion of tile surface: Spectral analysis found that the concentration of non-ferrous metal elements is abnormal; there are many sub-micron wear particles of non-ferrous metal components in the iron spectrum; the moisture of the lubricating oil exceeds the standard and the acid value exceeds the standard.

2. Strain on the journal surface: There are iron-based cutting abrasive particles or black oxide particles in the iron spectrum, and the metal surface has a tempered color.

3. Corrosion of journal surface: Spectral analysis found that the concentration of iron is abnormal, there are many sub-micron particles of iron in the iron spectrum, and the moisture or acid value of the lubricant exceeds the standard.

4. Surface strain: cutting abrasive particles are found in the iron spectrum, and the abrasive particles are non-ferrous metals.

5. Fretting wear of tile back: Spectral analysis found that the iron concentration is abnormal, there are many iron submicron wear particles in the iron spectrum, and the lubricant moisture and acid value are abnormal.
Under the condition of liquid lubrication, the sliding surface is separated by the lubricating oil without direct contact, and friction loss and surface wear can be greatly reduced. The oil film also has a certain vibration absorption capacity.