Pump

Abstract

Pump, in particular a canned motor pump, to deliver liquids in water carrying domestic appliances and such like, which comprises a stator, a rotor and a drive shaft non-rotatably coupled to an impeller disposed in a pump compartment which is rotatably arranged inside a motor casing via bearing means wherein seal means are fitted on a first face end of the motor casing to seal said casing off against the pump compartment, wherein the bearing and seal means arranged on the first face end of the motor casing are in the form of a seal-bearing combination which comprises an axial bushing section for sliding arrangement on the drive shaft, a radial closing section to cover up the motor casing and at least one flexible seal element formed to said axial bushing section and/or said radial closing section.

1 . A pump adapted to deliver liquids in water-carrying domestic appliances and such like, which comprises a stator, a rotor and a drive shaft non-rotatably coupled to an impeller disposed in a pump compartment which is rotatably arranged inside a motor casing via bearing means wherein seal means are fitted on a first face end of the motor casing to seal said casing off against the pump compartment, wherein the bearing and seal means arranged on the first face end ( 7 ) of the motor casing ( 2 ) are in the form of a seal-bearing combination ( 8 ) which comprises an axial bushing section ( 9 ) for sliding arrangement on the drive shaft ( 4 ), a radial closing section ( 12 ) to cover up the motor casing and at least one flexible seal element ( 18 ,  19 ) formed to said radial closing section ( 12 ). 
     
     
         2 . The pump according to  claim 1 , wherein the flexible seal element is a motor casing seal ( 18 ) formed to a radial outer marginal edge ( 20 ) of the closing section ( 12 ). 
     
     
         3 . The pump according to  claim 2 , wherein the motor casing seal element ( 18 ) is annular. 
     
     
         4 . The pump according to  claim 1 , wherein the motor casing seal element ( 18 ) is angular comprising two legs ( 21 ,  23 ) of which a first leg ( 21 ) extends from the periphery ( 22 ) of the radial outer marginal edge  20  and a second leg ( 23 ) protrudes from a radial surface ( 24 ) of the radial outer marginal edge ( 20 ) of the closing section ( 12 ). 
     
     
         5 . The pump according to  claim 1 , wherein the flexible seal element is a shaft seal ( 19 ) formed to an axial end of the bushing section ( 9 ). 
     
     
         6 . The pump according to  claim 5 , wherein the shaft seal element ( 19 ) is formed to the side of the bushing section ( 9 ) that is facing the impeller ( 6 ). 
     
     
         7 . The pump according to  claim 5 , wherein the shaft seal ( 19 ) extending in axial direction from the bushing section ( 9 ) is annular. 
     
     
         8 . The pump according to  claim 1 , wherein the motor casing seal ( 18 ) and the shaft seal ( 19 ) are spray-bonded to the closing section ( 12 ) and/or the bushing section section ( 9 ). 
     
     
         9 . The pump according to  claim 1 , wherein the motor casing seal ( 18 ) and the shaft seal ( 19 ) are made of an identical elastic material, in particular an elastomer. 
     
     
         10 . The pump according to  claim 1 , wherein the closing section ( 12 ) of the seal-bearing combination ( 8 ) comprises a disk ( 13 ) from which a first lock ring ( 14 ) extends on the side facing the motor casing ( 2 ) for attachment to said casing ( 2 ) and a second lock ring ( 16 ) protrudes on the side facing the impeller ( 6 ) for sealing connection with said impeller ( 6 ).