Centrifugal Pump Comprising a Spiral Housing

Abstract

The invention relates to a centrifugal pump comprising a spiral housing consisting of a first housing part and a second housing part, the latter being tubular and delimited in a region facing away from the inlet E of the inflowing medium in order to receive the rotor in its interior in a wet chamber N. A stator surrounds the second housing part and is situated in the dry chamber T in the vicinity of the exterior of the rotor ( 3 ). The tubular delimitation of the second housing part is provided with a cover, a first seal being located between the cover and the second housing part. Said seal comes into contact with the environment on at least one side facing away from the wet chamber N. The invention also relates to the use of the centrifugal pump as a coolant centrifugal pump in a motor vehicle.

1 .- 7 . (canceled) 
   
   
       8 . A centrifugal pump having a spiral housing, the centrifugal pump comprising:
 a first housing part;   a second housing part configured to mate with the first housing part, a portion of the second housing part remote from an inlet being tubular and accommodating a rotor in an internal wet chamber;   a dry chamber externally surrounding the second housing part, the dry chamber accommodating a stator arranged in an area corresponding to the rotor;   a motor housing externally surrounding the stator;   a cover configured to mate with the tubular portion of the second housing part; and   a first seal arranged between the cover and the tubular portion of the second housing part.   
   
   
       9 . The centrifugal pump as claimed in  claim 8 , wherein the first seal is connected to a surrounding environment by at least one of a duct and a passage in the cover. 
   
   
       10 . The centrifugal pump as claimed in  claim 8 , further comprising a second seal arranged between the motor housing and the tubular portion of the second housing part. 
   
   
       11 . The centrifugal pump as claimed in  claim 8 , wherein the first seal is an O-ring seal. 
   
   
       12 . The centrifugal pump as claimed in  claim 8 , wherein the second housing part comprises a first bearing and the cover comprises a second bearing, the first and second bearings are configured for rotatable mounting of the rotor. 
   
   
       13 . The centrifugal pump as claimed in  claim 8 , wherein an outer area of the second housing part has an outline of curved longitudinal section perpendicular to a direction of flow of a medium flowing in from the inlet. 
   
   
       14 . The centrifugal pump as claimed in  claim 8 , wherein the centrifugal pump is configured as a coolant centrifugal pump in a motor vehicle. 
   
   
       15 . The centrifugal pump as claimed in  claim 8 , wherein the first seal is connected to a surrounding environment by at least one of a duct and a passage on the cover. 
   
   
       16 . The centrifugal pump as claimed in  claim 10 , wherein the second seal an O-ring seal. 
   
   
       17 . The centrifugal pump as claimed in  claim 16 , wherein the second housing part comprises a first bearing and the cover comprises a second bearing, the first and second bearings configured for rotatable mounting of the rotor. 
   
   
       18 . The centrifugal pump as claimed in  claim 10 , wherein the first seal and the second seal are arranged at opposing respective internal and external areas of the tubular portion of the second housing part.