The main types of blade damage of water ring vacuum pump are blade damage, blade crack, blade corrosion or cavitation.
1. blade interruption
The main reason is that there are solid blocks inside the water ring vacuum pump, such as metal blocks, gravel and so on. When the impeller rotates, it hits the solid hard block or is stuck by the solid hard block, which breaks the blade. In addition, due to the stress concentration at the root of the blade, the fatigue damage caused by the gas and hydraulic pressure in the small chamber of the pump is caused. The impeller with damaged blades should be replaced in time, and the causes should be found out, and corresponding measures should be taken.
2. blade crack
It usually occurs at the root of the leaf. Most of them belong to fatigue cracks, and some of them are due to the casting cracks caused by the large difference between the blade and wheel size of the impeller of water ring vacuum pump. Cracked impellers should be replaced to avoid blade breakage and accidents.
3. abrasion of blades
If the impeller is damaged by friction with the impeller surface or by cavitation, it should be replaced seriously. If the damage is not serious, it can be repaired by repairing welding method. When repairing, the impeller can be heated to 600 C, and then repaired. When the blade gun size increases after repairing welding, the original size must be machined with a file or on a lathe, otherwise the original performance of the water ring vacuum pump will be affected.
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