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What are the repair and maintenance methods of centrifugal f

What are the repair and maintenance methods of centrifugal fans?
 
Centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Now it has a wide range of uses in industry, construction and other fields. The repair and maintenance methods of centrifugal fan are Which ones?
 
1. Small repair of centrifugal fan
In overhauling centrifugal fans, small repairs can improve the operating power of the fan. There are several steps in the repair as follows;
1. Check the screws and base spirals of each part of the centrifugal fan.
2. Clean the bearing, bearing box, oil mark, etc. of the centrifugal fan, and adjust the gap between the bearings.
3. Check the condition of the coupling of the centrifugal fan and the connected pump.
4. Tighten the screws of the foot of the fan, and confirm that the centrifugal fan is not loose or deformed.
 
2. Overhaul of centrifugal fan
When overhauling the centrifugal fan, pay attention to the operating conditions of the centrifugal fan.
1. In the overhaul, spare parts and mechanical parts of the centrifugal fan seal should be replaced in time.
2. It is necessary to check the wear, corrosion and cavitation conditions of the shaft, sleeve, bearing, impeller, pump casing, and pump cover. At this time, it is necessary to confirm whether to replace these primary components of the centrifugal fan according to the actual conditions.
3. It is replacing the coupling, diaphragm and reinforcement screws of the centrifugal fan. Also need to replace the centrifugal fan oil seal, gasket and precision parts of the pump body. After completing these repair operations, the fan must be tested, and professional testing instruments must be used in the test, so as to achieve the effectiveness of the repair, and greatly improve the service life of the centrifugal fan.