초록 ▼

A compressor stage or a turbocharger having a compressor stage having an inducer shroud with two or more vents. A first vent is provided with a second vent upstream thereof, allowing for outflow during surge conditions and inflow during choking conditions. Surge line characteristics may be varied by

A compressor stage or a turbocharger having a compressor stage having an inducer shroud with two or more vents. A first vent is provided with a second vent upstream thereof, allowing for outflow during surge conditions and inflow during choking conditions. Surge line characteristics may be varied by selectively locating the position of the first and of the second vents, and by selectively determining the effective width of the vents. The vents may be circumferential slots, and may be slanted. An outer shroud is provided forming a venting chamber for recirculation of gas into the gas intake. A third vent may be provided to vent the diffuser.

대표청구항 ▼

A gas compressor stage comprising: an impeller including a blade, said blade having a leading edge, an outward free edge and a trailing edge; means for driving said impeller; a compressor housing having a gas intake and a gas diffuser passageway downstream thereof, said impeller being located in sai

A gas compressor stage comprising: an impeller including a blade, said blade having a leading edge, an outward free edge and a trailing edge; means for driving said impeller; a compressor housing having a gas intake and a gas diffuser passageway downstream thereof, said impeller being located in said housing along a gas flow path between said gas intake and said gas diffuser passageway, wherein said housing includes a shroud wall upstream of said gas diffuser passageway and having an internal shroud surface in close proximity to said radially outward free edge of said blade; a first vent in said shroud wall being located in said shroud wall upstream of said trailing edge of said impeller; and a second vent in said shroud wall being located in said shroud wall upstream of said first vent, wherein said impeller further includes a hub and defines a meridional path between said hub and said radially outward free edge, wherein said meridional path intersects with said leading edge of said impeller to define a meridional datum, wherein said meridional path intersects with said trailing edge to define a high pressure datum, and wherein said first vent is located between said meridional datum and said high pressure datum.