CHEMICAL HORIZONTAL PUMP WITH ENCLOSED IMPELLER (VERSIONS) Russian patent published in 2014 - IPC F04D7/00 F04D29/08 F04D29/62 

FIELD: engines and pumps.

SUBSTANCE: signal-stage cantilever pump flow section housing has flow section integrated with involute collector. Running part housing has crankcase and bearing supports to cover larger portion of the shaft length. Impeller represents a multifilar component. Impeller main disc is protected by hydraulic lock including the impeller composed of extra independent disc with leg-like vanes. Flow section housing has circular removable stepped wall. Smaller outer radius of said wall makes at least the impeller bore radius while hydraulic lock impeller radius is smaller than impeller radius. Main disc comprises circular ledge with OD smaller than impeller disc radius to make with hub wall the circular channel communicated with hydraulic lock impeller. Main disc comprises at least one through bore to communicated with impeller inner chamber. Cover disc has inlet filler with inner radius making at least one radius on flow section housing inlet opening.

EFFECT: better tightness, longer life and higher reliability.

22 cl, 2 dwg