TURBOCOMPRESSOR FRANCIS TURBINE HOUSING Russian patent published in 2005 - IPC

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: proposed housing of Francis turbine of turbocompressor used in supercharging system of internal combustion piston engines has flanges, working space of turbine wheel, bypass valve and acceleration conical section. Acceleration conical section terminates in vaneless nozzle unit in form of scroll with slotted converging tube provided with base and rear walls. Optimum ratio of diameters of slotted converging tube is 1.04. Base wall of scroll is square to axis of turbine, and rear wall is tilted at angle β. Angle β depends of inner diameter of scroll, width of slotted converging tube and difference in diameters of section of gas flow formation at inlet into slotted converging tube. Invention is aimed as increasing power output of turbine and engine power at idling at crankshaft speed of 1100 to 1800 rpm.

EFFECT: increased power output of turbine and engine at idling.

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