Pump Assembly Having an Axial-Flux Electric Drive

Abstract

The invention relates to a pump assembly, at least comprising a first housing, in which at least one first drive means for conveying a fluid is rotatably mounted, wherein a first drive shaft of the first drive means extends at least through a first side wall of the first housing in an axial direction; wherein, outside of the first housing, at least one first rotor of a first axial-flux electric drive is arranged on the first drive shaft, wherein the first axial-flux electric drive has only one stator.

1 . A pump arrangement comprising a first housing in which there is arranged in a rotatably mounted manner a first drive for delivering a fluid, wherein a first drive shaft of the first drive extends through a first side wall of the first housing along an axial direction, wherein, outside the first housing, a first rotor of a first axial flux electric drive is arranged on the first drive shaft, wherein the first axial flux electric drive has only one stator. 
     
     
         2 . The pump arrangement as claimed in  claim 1 , wherein, outside the first housing, the first drive shaft is not mounted or is mounted by way of a bearing, which exclusively accommodates forces acting in the axial direction. 
     
     
         3 . The pump arrangement as claimed in  claim 1 , wherein the first axial flux electric drive is arranged in a second housing which connectable in a repeatably detachable manner to the first housing. 
     
     
         4 . The pump arrangement as claimed in  claim 1 , wherein the first rotor is arranged directly adjacent to the first side wall and between the first side wall and a stator of the first axial flux electric drive. 
     
     
         5 . The pump arrangement as claimed in  claim 1 , wherein the stator is arranged directly adjacent to the first side wall and between the first side wall and the first rotor. 
     
     
         6 . The pump arrangement as claimed in  claim 5 , wherein the stator is arranged outside the first drive in a radial direction. 
     
     
         7 . The pump arrangement as claimed in  claim 6 , wherein the stator is arranged so as to overlap the first housing along the axial direction. 
     
     
         8 . The pump arrangement as claimed in  claim 7 , wherein the stator is arranged so as to overlap the first drive along the axial direction. 
     
     
         9 . The pump arrangement as claimed in  claim 5 , wherein the stator is inseparably connected to the first side wall. 
     
     
         10 . The pump arrangement as claimed in  claim 1 , wherein the first drive is a first gearwheel rotor. 
     
     
         11 . The pump arrangement as claimed in  claim 1 , wherein the stator of the axial flux electric drive comprises materials which comprise soft magnetic composite. 
     
     
         12 . The pump arrangement as claimed in  claim 1 , wherein the first axial flux electric drive forms a heating element which is connected in a heat-conducting manner to the first side wall via a heat-conducting structure. 
     
     
         13 . The pump arrangement as claimed in  claim 1 , wherein a second axial flux electric drive is arranged outside the first housing and on a second side wall, opposite the first side wall, of the first housing, wherein the second axial flux electric drive is connected in a torque-transmitting manner either to the first drive shaft or to a second drive shaft of a second drive which is arranged in the first housing. 
     
     
         14 . The pump arrangement as claimed in  claim 13 , wherein the second axial flux electric drive is connected in a torque-transmitting manner to the second drive shaft, and wherein the second drive is a second gearwheel rotor which is arranged so as to mesh with the first gearwheel rotor for delivering the fluid, wherein the two gearwheel rotors are arranged so as to be braced with respect to one another via the two axial flux electric drives. 
     
     
         15 . The use of the pump arrangement as claimed in  claim 1 , for delivering a water-urea solution in a motor vehicle.