Grundfos CR15-05 multi-stage centrifugal pump makes a lot of noise. Please give us some advice on how to solve it.
Thread Content
Lanfu CR15-05 multi-stage centrifugal pump has a lot of noise, the disc shaft does not move, the inner bearing ring is broken, the graphite inner ring in the bearing diversion chamber is missing, and there are traces of the impeller rubbing. Below are the five cavities and impellers. Let’s analyze how to solve it.
Is it subjected to axial force? Then there is whether the vibration of the equipment is detected and spectrum analyzed during operation, so that the problem can be found relatively quickly. Hope it helps you
Without frequency spectrum analysis, the frequency converter cannot drive the water pump now. When it is started at 7HZ, it is 8.2A. The pump buzzes but does not rotate.
The machine is rubbing. Replace it with new parts. After installing the turning machine, see if there are any scratches.
Can't even turn the car? Are you sure the assembly is OK?
Do you need to replace the entire impeller? It needs a very expensive Grundfos, 4 kilowatt water pump.
The current ones are all old and have not been replaced with new ones. They have been used for eight years. Three years ago they started to make noises, but they were ignored. Of our two pumps, the other one was normal.
If you want to buy Grundfos parts, hurry up. Prices will be adjusted again starting from January 1, 2019. If it really can't be repaired, just replace it with a domestic one.
Are you from the manufacturer? Are domestic products not durable?
That’s not to say. Because the price of domestic parts cannot be raised and competition is fierce, the quality will decrease after controlling costs. If the quality is strictly controlled at normal foreign prices, there will be no difference in the use effect. Many so-called foreign products are made domestically.