CHEMICAL HORIZONTAL ELECTRICALLY DRIVE PUMP UNIT Russian patent published in 2014 - IPC F04D7/00 F04D13/06 F04D29/08 F04D29/22 

FIELD: engines and pumps.

SUBSTANCE: invention relates to pump engineering, particularly to electrically driven pump for transfer of chemically aggressive fluids. Proposed unit comprises motor, rotary pump and coupling. Single-stage cradle-mounted pump comprises housing with running and flow housings. Flow housing comprises collector case integrated with pressure pipe and having circular stepped ledge, rear wall composed by circular stepped ledge and circular stepped ledge, and detachable lead-in cover with axial feed pipe. Running section housing has crankcase and bearings. Exposed impeller is composed of multifilar impeller with main disc with hub and set of blades and circular ledge arranged in outline. Ledge outer radius is congruent with mating inner radius of circular steeped ledge. Said disc a vaned impeller. Pump has hydraulic lock composed of said separate disc with vaned impeller fitted on the shaft. Impeller radius is smaller than that of working wheel.

EFFECT: protection against leaks, longer life, higher reliability, non-polluting design.

13 cl, 5 dwg