Patent ID: 8297948

Claim:
An arrangement for delivering fluids comprising: a fluid pump ( 91 ), implemented as a centrifugal pump, which includes a pump wheel ( 90 ) that is connected to a first permanent magnet ( 92 ); an electronically commutated internal-rotor motor ( 70 ) having a stator ( 68 ), inside which is rotatably arranged a rotor ( 60 ) having a second permanent magnet ( 64 ) that interacts with the first permanent magnet ( 92 ) as a magnetic coupling ( 93 ); a partitioning can ( 52 ) that separates the first permanent magnet ( 92 ) of the magnetic coupling ( 93 ), said first permanent magnet being arranged inside said partitioning can ( 52 ), in fluid-tight fashion from the second permanent magnet ( 64 ) of the internal-rotor motor ( 70 ), said second permanent magnet being arranged outside the partitioning can ( 52 ), the stator ( 68 ) of the internal-rotor motor ( 70 ) being arranged at least predominantly radially outside the magnetic coupling ( 93 ); a bearing arrangement ( 55 , 56 ; 155 , 156 ), a first stationary shaft ( 54 ) mounted on an outer side of the partitioning can ( 52 ) and surrounded, on a side facing away from the fluid pump ( 91 ), by a layer ( 49 ) made of plastic material, said first stationary shaft ( 54 ), together with the bearing arrangement ( 55 , 56 ; 155 , 156 ), serving for rotatable journaling of the rotor ( 60 ) of the internal-rotor motor ( 70 ), and a second stationary shaft ( 50 ) provided, on an inner side of said partitioning can ( 52 ), for journaling the pump wheel ( 90 ), the second stationary shaft ( 50 ) being made of a dimensionally stable material and extending into the first stationary shaft ( 54 ) in order, together with the layer ( 49 ) made of plastic material, to form and stiffen the first stationary shaft ( 54 ) there, the bearing arrangement ( 55 , 56 ; 155 , 156 ) being arranged at the circumference of the first stationary shaft ( 54 ) and the second stationary shaft ( 50 ).