Horizontal centrifugal pump impeller high-pressure common questions and treatment methods

Is a major part of the horizontal centrifugal high-pressure pump impeller, made from cast iron, the pump impeller blade and plays a main role in the shape and size of the horizontal high pressure centrifugal pump impeller and pump performance has a close relationship. Both equipped with moving blade wheel, impeller is the component of impulse turbine rotor, and can be referred to as the roulette and installation on the floorboard of the rotor blade. Impeller were common casting or welding, material according to the working medium is chosen, main effect: the impeller is the prime mover's mechanical energy into working liquid can static pressure and dynamic pressure can.

horizontal centrifugal pump impeller high-pressure common questions and treatment methods of a, the impeller casting defects

failure performance: flow inclusion; More meat; Not smooth; Trachoma. Crack; Shrinkage and so on.

processing method: according to the actual situation of grinding and repair welding method, if the problem is serious, need to lay waste the recasting.

2, impeller abrasion fault performance:

this is made of grey cast iron material casting process pump impeller within five years by water containing a small amount of cement foam wear, abrasive wear problem is more of a representative selection inappropriate or improper water pump type selection, or the process medium was caused by pollution.

processing method: change the impeller material; Change the design, change the pump type; Check the process medium. Three, impeller cavitation

failure performance: improper design; Installation position is too high; Improper material selection, etc.

processing methods: reduce the installation location; The material of change seems to be more resistant to cavitation; Redesign water pump type, etc. Four, impeller mouth surrounded by dead

failure performance: the design gap is too small; Mouth ring hardness difference before and after less than 50 HBW; Mouth gap between solid particles; Mouth ring deformation, etc.

processing methods: increase the design clearance; Replace the mouth ring material; Check the process medium; Replace the new mouth ring, etc. Five, impeller fracture

failure performance: caused by cavitation, corrosion and abrasion; Poor casting quality cause; The result of water hammer.

processing method: change the new impeller.

6, impeller corrosion failure performance: improper material selection.

processing method: change the new impeller, corrosion and wear resistant materials; Impeller corrosion resistant layer of plating; Impeller corrosion resistant layer of coating.

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