DISPERSING STAGE OF SUBMERSIBLE MULTISTAGE CENTRIFUGAL PUMP Russian patent published in 2009 - IPC F04D13/10 F04D31/00 

FIELD: engines and pumps.

SUBSTANCE: invention is related to oil machine building and may be used in submersible multistage centrifugal pumps for pumping of formation water. Dispersing stage of submersible multistage centrifugal pump comprises guide vanes 1, consisting of sleeve 2, bushing 3, arranged as metal and connected to each other by polymer flow path 4. In flow path 4 blades 5 are installed, which form channels 6. Bushing 3 of guide vanes 1 via antifriction orifice 7 interacts with metal bushing 8, which is rigidly connected to polymer impeller 9. Bushing 8 with impeller 9 are installed on shaft 10. Between impeller 9 and flow path 4 additional antifriction orifice 11 is installed. Impeller 9 is equipped with additional vanes forming channels 13 for passage of formation water. Main radial vanes 14 are installed on upper plane of impeller 9.

EFFECT: provision of stage unification, increased discharge and interrepair time.

3 dwg