FIELD: engines and pumps.
SUBSTANCE: invention relates to pump engineering, particularly to electrically driven pump for transfer of abrasive fluids. Proposed unit comprises motor, rotary pump, adapter with bearing flanges and housing accommodating the clutch. Rotary cradle-mounted semi-submersible pump has housing dos running and flow sections. Running section housing is equipped with bearing housings. Running section housing has basic length or that increased by fitting extension insert between running section main housing lower end and flow section housing. Shaft lower extension length is larger than that of lower extension by at least 2.25 times. Impeller represents a closed impeller with main and cover disc with multifilar systems of blades with angular twist. Said vanes are separated by diffuser intervane channels. Active volume of dynamic filling of said channels comprises delivery of definite volume of pumped fluid per one impeller revolution. Pressure pipe is composed of diffuser to decrease flow rate at its outlet.
EFFECT: longer life, higher reliability and efficiency.
25 cl, 7 dwg
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