1. Check the two half-coupling, if cracks, or pin holes due to wear and tear, obviously out of round, it should be replaced. Check the keyway, if the deformation is not too large available file to correct it; deformation is relatively large, you can use machining methods, the keyway widening (but shall not exceed the original size of 10%), and thenreconfigurationIf the keyway is so damaged that it is difficult to repair and there are no spare parts available for replacement, the keyway can be reworked opposite the old keyway.

2. Inspect the coupling bolts and replace them if they are bald, bent or cracked.

3. Check the rubber ring, if the wear is serious, it should be replaced. And all rubber rings on the coupling should be replaced at the same time to ensure that the force on each pin is uniform during operation.

Roots fan rubber ring is a standard part, there are specific technical requirements. If the realization can not be purchased, the leather ring can be used as a temporary substitute. Homemade leather ring specific method is: made of high-quality leather with a slightly larger outside diameter circle, one by one in the set on the pin pressure, and then use the grinder to grind the outer ring to the specified size.

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