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The usage method of self-aligning roller bearings for fans covers multiple aspects such as installation, operation monitoring, lubrication maintenance, and fault handling. The following is a detailed introduction:

Installation method

Installation of cylindrical hole self-aligning roller bearings

Heating installation: Use a heating oil tank, oven, tempering furnace, or inductive heater to heat the bearing to 80 ℃~100 ℃, and the insulation time is adjusted according to different heating methods (oil tank heating is generally 30 minutes, oven and tempering furnace are more than twice the heating time of the oil tank, and inductive heating is 1/2 of the heating time of the oil tank). After heating, quickly insert the bearing onto the shaft until the inner ring end face of the bearing is in close contact with the shaft shoulder. After the bearing cools down, tighten the locking nut.

Core rod pressure method: For small-sized bearings, a core rod press and mounting tube can be used to press the shaft onto the shaft or into the seat hole.

. The inner diameter of the installation pipe should be slightly larger than the outer diameter of the bearing, and the outer diameter should not exceed the specified maximum shoulder. Both ends of the pipe should be perpendicular to the pipe bearing.

Installation of tapered hole self-aligning roller bearings

Tightening sleeve installation: Place the tightening sleeve on the platform and remove the locking nut.

. After cleaning the surface of the shaft, fit the clamping liner onto the shaft and then install the bearing. By tightening the locking nut, the inner ring of the bearing is expanded to achieve an interference fit. During the installation process, it is necessary to measure the bearing clearance to ensure that the installation clearance target value is achieved.

Installation of the removal liner: Insert the small outer diameter end of the removal liner into the inner diameter of the bearing and match it with the bearing, then install the locking nut on the shaft so that the end face of the locking nut is pressed against the end face of the removal liner.

. Slowly tighten the locking nut and press the release liner into the inner diameter surface of the bearing until the installation clearance target value is reached.

Operation monitoring

Temperature monitoring: Regularly check the bearing temperature to ensure it is within the normal range.

. If the bearing temperature is too high, it may be caused by insufficient lubrication, bearing damage, or improper installation, and it needs to be promptly investigated and dealt with.

Vibration monitoring: Use vibration monitoring instruments to regularly check the vibration of bearings.

. If there is abnormal vibration, it may be caused by bearing damage, improper installation, or rotor imbalance. It is necessary to stop the machine in a timely manner for inspection and handling.

Noise monitoring: During the operation of the fan, pay attention to the bearing noise.

. If the noise is abnormal, it may be caused by bearing damage, insufficient lubrication, or improper installation, and it needs to be promptly investigated and dealt with.

Lubrication and maintenance

Lubricating oil selection: Choose the appropriate lubricating oil according to the operating conditions of the fan and the requirements of the bearings.

. Ensure that the lubricating oil is of good quality, free from impurities, dust, and dirt. Lubrication cycle: Lubricate according to the recommended lubrication cycle of the bearing manufacturer. Under harsh operating conditions, it is necessary to shorten the lubrication cycle. Lubrication method: Manual lubrication or automatic lubrication system is used for lubrication. Ensure that the lubricating oil is evenly distributed on the bearing raceway and rolling elements.

Troubleshooting

Bearing damage: If the bearing is damaged (such as peeling of the raceway, wear of the rolling elements, etc.), it should be replaced with a new bearing in a timely manner.

. When replacing bearings, it is necessary to ensure that the new bearing is of the same model as the old bearing and to install it according to the correct installation method. Improper installation: If the bearing is installed improperly and causes a malfunction (such as excessive or insufficient clearance, bearing misalignment, etc.), the bearing needs to be reinstalled. During installation, it is necessary to ensure that the bearing clearance meets the requirements and avoid bearing misalignment or uneven stress. Insufficient lubrication: If bearing failure occurs due to insufficient lubrication (such as bearing overheating, increased wear, etc.), it is necessary to strengthen lubrication maintenance. Increase the lubrication cycle or replace the lubricating oil to ensure that the bearings are fully lubricated.