Causes and Solutions for Bearing Failures in Fire Cabinet Centrifugal Fans
When using a fire cabinet centrifugal fan unit, bearing issues may arise.
The specific situation is as follows: After securing the blades on both sides with the bearing housing, it was found that the temperature of the free-end bearing was relatively high, and vibration issues occurred during trial operation. What should be done in this case?
To address this situation, disassemble the upper cover of the bearing housing on the fire cabinet centrifugal fan unit and slowly rotate it by hand to confirm that the bearing rollers at the shaft location are also rotating. This was done under no-load conditions.
Therefore, it can be concluded that this issue was caused by excessive variation in bearing clearance and improper clearance settings.
Subsequent measurements revealed that the clearance between the bearings was indeed improper. Since the span between the two bearings is large, it is difficult to avoid this problem.
Consequently, for large-scale fire cabinet centrifugal fan units, self-aligning spherical roller bearings can be used.
Furthermore, if this situation is detected, the unit must be shut down and addressed promptly.
So, how can the issue of improper clearance be resolved?
The specific method is as follows. First, remove the locking sleeve, then adjust the fit between the shaft and the inner ring. After replacement, control the clearance between the bearings to approximately 0.10 mm.
After installation, restart the fire-rated cabinet-type centrifugal fan; the bearing vibration levels and operating temperature will return to normal.
The above is a brief introduction to the bearings of fire-rated cabinet-type centrifugal fans. We hope this information helps you better understand this issue.
In the future, when using fire-rated cabinet-type centrifugal fans, it is essential to pay attention to this issue and maintain normal operation as much as possible.
When using a fire cabinet centrifugal fan unit, bearing issues may arise.
The specific situation is as follows: After securing the blades on both sides with the bearing housing, it was found that the temperature of the free-end bearing was relatively high, and vibration issues occurred during trial operation. What should be done in this case?
To address this situation, disassemble the upper cover of the bearing housing on the fire cabinet centrifugal fan unit and slowly rotate it by hand to confirm that the bearing rollers at the shaft location are also rotating. This was done under no-load conditions.
Therefore, it can be concluded that this issue was caused by excessive variation in bearing clearance and improper clearance settings.
Subsequent measurements revealed that the clearance between the bearings was indeed improper. Since the span between the two bearings is large, it is difficult to avoid this problem.
Consequently, for large-scale fire cabinet centrifugal fan units, self-aligning spherical roller bearings can be used.
Furthermore, if this situation is detected, the unit must be shut down and addressed promptly.
So, how can the issue of improper clearance be resolved?
The specific method is as follows. First, remove the locking sleeve, then adjust the fit between the shaft and the inner ring. After replacement, control the clearance between the bearings to approximately 0.10 mm.
After installation, restart the fire-rated cabinet-type centrifugal fan; the bearing vibration levels and operating temperature will return to normal.
The above is a brief introduction to the bearings of fire-rated cabinet-type centrifugal fans. We hope this information helps you better understand this issue.
In the future, when using fire-rated cabinet-type centrifugal fans, it is essential to pay attention to this issue and maintain normal operation as much as possible.
