LIQUID TRANSFER PUMP AND THE IMPELLER ASSEMBLY Russian patent published in 2018 - IPC F04D7/04 F04D29/42 F04D29/20 

FIELD: machine building.

SUBSTANCE: group of inventions relates to impeller assembly and fluid transfer pump, comprising the pump chamber and impeller (4) located in the said chamber with possibility of rotation. Impeller is suspended at the lower end (5) of the axially extending drive shaft assembly (6). Lower end (5) of the unit (6) is located in the impeller (4) cylindrical recess (10). Impeller (4) is configured to move forward and backward in the axial direction relative to the unit (6). Impeller (4) is optionally contains axially extending channel (21), which connects the cylindrical recess (10) and the pump chamber. Unit (6) contains axially extending pin (22), which projects from lower end (5) of unit (6) and is located in the channel (21) so, that to prevent the injected liquid ingress into the impeller (4) recess (10).

EFFECT: disclosed are the liquid transfer pump, and the impeller assembly.

12 cl, 7 dwg