Patent ID: 8568093

Claim:
A multi-stage centrifugal pump assembly comprising a motor housing ( 2 ), a pump housing connected thereto, and a bearing carrier ( 13 ) receiving a bearing ( 14 ) of a shaft ( 3 ), which on a motor side carries a rotor ( 4 ) and on a pump side carries impellers ( 7 ) arranged in pump chambers ( 8 ), wherein the bearing carrier ( 13 ) is designed for selectively receiving a cast housing part ( 12 ) comprising a pressure connection ( 11 ) of the pump or of a lining part ( 28 ) formed of sheet metal, wherein the bearing carrier ( 13 ) on the pump side comprises a first support ring ( 19 ), which is designed and arranged corresponding to a support region to an outer diameter of the pump chambers ( 8 ), wherein the bearing carrier ( 13 ) on the pump side comprises a second support ring ( 21 ) which lies within the first support ring ( 19 ) and which supports the lining part ( 28 ) on the inside, and wherein the bearing carrier ( 13 ) on the pump side comprises a third support ring ( 23 ) arranged within the first and the second support rings ( 19 , 21 ) and which axially supports a stationary part ( 24 ) of an axial face seal ( 15 ).