ELECTRIC PUMP UNIT Russian patent published in 2018 - IPC F04D13/06 F04D29/44 

FIELD: engines and pumps.

SUBSTANCE: electric pump unit includes a housing (1) and an electric motor (4) and two-bearing hollow shaft (5) of the pump with at least one working wheel (6) communicated with shaft (9) of the electric motor (4) through a torsion shaft (10) that are provided therein. Bushing (11) of the torsion shaft (10) is mounted on the shaft (9) of the electric motor (4), and the free end of the shaft (10) is located in shaft cavity (5) and rigidly connected thereto. On the outer surface of the bushing (11) there are at least two radial projections (22) positioned with lateral and radial clearances in axial and radial grooves (23), provided on the inner surface closest to the electric motor (4) of the pump shaft end (5).

EFFECT: increased reliability.

3 dwg