Motor casing for pumps, particularly centrifugal pumps and peripheral centrifugal pumps

Abstract

A motor casing for pumps, particularly centrifugal pumps and peripheral centrifugal pumps, containing a motor associated with the hydraulic part, provided with at least one impeller, by means of a rotation transmission shaft, the motor casing having at least one surface that is struck by pumping liquid that arrives from the hydraulic part and is provided with an oxidation-resistant coating.

What is claimed is: 
     
         1 . A motor casing for pumps, particularly centrifugal pumps and peripheral centrifugal pumps, containing a motor associated with the hydraulic part, provided with at least one impeller, by means of a rotation transmission shaft, said motor casing being provided with at least one surface that is struck by pumping liquid that arrives from said hydraulic part and wherein said surface struck by pumping liquid is provided with an oxidation-resistant coating. 
     
     
         2 . The motor casing according to  claim 1 , wherein said coating is provided by deposition of oxidation-resistant materials. 
     
     
         3 . The motor casing according to  claim 2 , wherein said coating is provided by Teflon coating. 
     
     
         4 . The motor casing according to  claim 2 , wherein said coating is provided by deposition of ceramic material. 
     
     
         5 . The motor casing according to  claim 2 , wherein said coating is provided by overmolding plastic material. 
     
     
         6 . The motor casing according to  claim 1 , wherein it is made of aluminum. 
     
     
         7 . The motor casing according to  claim 6 , wherein it is made of pressure die-cast aluminum. 
     
     
         8 . The motor casing according to  claim 1 , wherein said surface is arranged, on the hydraulic side, at the interface between said hydraulic part and said motor. 
     
     
         9 . The motor casing according to  claim 1 , wherein said surface belongs to at least one compartment defined around said motor. 
     
     
         10 . The motor casing according to  claim 9 , wherein said compartment is defined around said motor with interspaces arranged side by side and divided by partitions that extend radially from an inner wall of said motor casing, which surrounds said motor, to an outer wall. 
     
     
         11 . The motor casing according to  claim 5 , wherein said plastic material consists of an elastomer rubber.