FIELD: engines and pumps.
SUBSTANCE: submersible multistage centrifugal pump comprises working wheels with hubs which are connected to a drive shaft by means of a key joint in the form of key grooves, and keys installed therein. On each working wheel the key groove is in the form of a transverse groove with its depth decreasing in the direction of the drive shaft rotation and configured for shifting the key with the shaft relative to the working wheel and fixing them in radial and longitudinal directions.
EFFECT: reduced wear of structure parts, increased reliability and durability of the pump.
2 dwg
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