Centrifugal electric pump for suction of aeriform fluids with liquids anti-infiltration device

Abstract

A centrifugal electric pump ( 1 ) for suction of aeriform fluids with liquids anti-infiltration device, including: an electric motor ( 2 ) equipped with a shaft ( 3 ); a cylindrical suction box ( 4 ) associated with the motor ( 2 ), provided with an intake ( 5 ) for aeriform fluid, with at least one exhaust port ( 6 ) and with a closing cover ( 7 ) also arranged for acting as base for the motor ( 2 ); at least one fan ( 8 ), fitted onto the shaft ( 3 ) and driven in movement by the motor ( 2 ); a bearing ( 9 ) interposed between the shaft and the base of the suction box; a liquids anti-infiltration device ( 10 ) arranged between the electric motor ( 2 ) and the suction box ( 4 ), provided with a gasket ( 11 ), wherein the gasket ( 11 ) rotates with the drive shaft ( 3 ) and includes a cylindrical main body ( 13 ) associated with the shaft, and a truncated-cone shaped sealing lip that cooperates with the flat face of a metal ring ( 12 ), provided between the bearing and the cover ( 7 ) of the suction box ( 4 ) to produce watertight closure of the box.

1 ) A centrifugal electric pump ( 1 ) for suction of aeriform fluids provided with liquids anti-infiltration device, comprising:
 an electric motor ( 2 ) equipped with a shaft ( 3 );   a cylindrical suction box ( 4 ) associated with said motor ( 2 ), provided with an intake ( 5 ) for aeriform fluid positioned centrally with respect to a base ( 4 ′) of said box, at least one exhaust port ( 6 ) arranged on the lateral surface ( 4 ″) thereof and with a closing cover ( 7 ) also arranged for acting as base for said motor ( 2 );   at least one fan ( 8 ), fitted onto said shaft ( 3 ) and driven in movement by said motor ( 2 ), arranged for sucking a flow of air (F) from said intake ( 5 ), spin it and discharge it outside said suction box ( 4 ) through said at least one exhaust port ( 6 ),   a bearing ( 9 ) interposed between said shaft and said base of said suction box;   a liquids anti-infiltration device ( 10 ), arranged between said electric motor ( 2 ) and said suction box ( 4 ), provided with a gasket ( 11 ),   
       characterized in that said gasket ( 11 ) rotates with said drive shaft ( 3 ) and comprises a cylindrical main body ( 13 ) associated with said shaft, and a truncated-cone shaped sealing lip ( 14 ) that cooperates with a flat face of a metal ring ( 12 ), provided between the bearing and the cover ( 7 ) of said suction box ( 4 ) to produce watertight closure of said box. 
     
     
         2 ) A centrifugal electric pump ( 1 ) according to  claim 1 , characterized in that said gasket ( 11 ) is of the V-Ring type with elastic body ( 13 ) and sealing lip ( 14 ). 
     
     
         3 ) A centrifugal electric pump ( 1 ) according to  claim 1 , characterized in that a spacer ( 15 ) is interposed between said motor shaft ( 3 ) and said gasket ( 11 ).