Patent ID: 11879474
Assignee: GRUNDFOS HOLDING A/S
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A centrifugal pump assembly comprising:
a pump head configured to connect to or be integral with a motor stool and/or a motor housing;
a pump base defining a pump inlet and a pump outlet;
at least one fluid outlet channel configured to guide pumped fluid from the pump head to the pump outlet;
at least two rotor shaft segments coaxially aligned and extending along a rotor axis, wherein each of the at least two rotor shaft segments comprises a first axial end facing away from the pump head and a second axial end facing away from the pump base;
one or more impellers, each of the one or more impellers having a structure defining at least one impeller fluid channel extending from an impeller inlet to an impeller outlet, wherein each of the one or more impellers is fixed to or structurally integral with one of the at least two rotor shaft segments, wherein the first axial end of one of the at least two rotor shaft segments comprises a positive fit coupling configured for coupling with the second axial end of another one of the at least two rotor shaft segments for torque transfer between the at least two rotor shaft segments; and
one or more pump stage housing segments arranged between the pump base and the pump head, wherein each of the one or more pump stage housing segments have a structure defining a guide passage for receiving pumped fluid from the impeller outlet of one of the one or more impellers and for guiding pumped fluid to the impeller inlet of another one of the one or more impellers or to the pump head, wherein the one or more pump stage housing segments each have a structure defining at least a part of a wall section of the at least one fluid outlet channel, wherein the one or more pump stage housing segments each comprise a first mechanical coupling at a first axial segment end facing towards the pump base and a second mechanical coupling at a second axial segment end facing towards the pump head, wherein the one or more pump stage housing segments is coupled to the pump base or to another pump stage housing segment by the first mechanical coupling, and wherein the one or more pump stage housing segments is coupled to the pump head or to another pump stage housing segment by the second mechanical coupling.