Inclined rib ported shroud compressor housing
View Patent ↗A turbocharger system having a compressor housing containing a rotating compressor wheel with a plurality of impellers that define an impeller passageway from an inducer to an exducer. The compressor housing includes an annular upstream housing-portion forming an upstream shroud-wall, and a downstream housing-portion forming a downstream shroud-wall. The a rib supports the upstream housing-portion with respect to the downstream housing-portion such that they are respectively disposed to form an annular bypass port into the impeller passageway between the upstream and downstream shroud-walls. The rib extends along a non-axial path within the bypass passageway.
1. A compressor housing configured to contain a rotating wheel-body with a plurality of blades that define an impeller passageway from an inducer to an exducer, through which the plurality of blades are configured to rotate, comprising:
an annular upstream housing-portion forming an upstream shroud-wall substantially conforming to an upstream portion of the impeller passageway;
a downstream housing-portion forming a downstream shroud-wall substantially conforming to a downstream portion of the impeller passageway; and
a rib supporting the upstream housing-portion with respect to the downstream housing-portion such that they are respectively disposed to form an annular bypass port connecting an axially extending bypass passageway and the impeller passageway between the upstream and downstream shroud-walls, the rib extending along a helical path along the axial extent of the bypass passageway.
2. The compressor housing of claim 1 , wherein the helical path of the rib defines a constant angle to planes perpendicular to the axial direction.
3. The compressor housing of claim 1 , wherein the helical path of the rib defines a varying angle to planes perpendicular to the axial direction, such that the angle is greater for planes closer to the bypass port.
4. The compressor housing of claim 1 , wherein the compressor wheel is configured to rotate in a wheel-rotation direction, and wherein the rib is helically wound to provide for airflow from the bypass port that is angled in the wheel-rotation direction.
5. The compressor housing of claim 1 , wherein the rib extends radially across the bypass passageway.
6. The compressor housing of claim 1 , wherein:
the helical path defines a constant angle to planes perpendicular to the axial direction;
the compressor wheel is configured to rotate in a wheel-rotation direction;
the rib is helically wound to provide for airflow from the bypass port that is angled in the wheel-rotation direction; and
the rib extends radially across the bypass passageway.
7. A compressor, comprising:
the compressor housing of claim 1 ; and
a compressor wheel configured as the wheel-body, and being rotatably received within the compressor housing.
8. A turbocharger, comprising:
the compressor of claim 7 ; and
a turbine configured to drive the compressor.
9. A power system, comprising:
an internal combustion engine; and
the turbocharger of claim 8 , being configured to operate with the internal combustion engine.
10. A method of compressing air, comprising:
driving a compressor wheel in rotation within a compressor housing, the compressor wheel having a plurality of blades that define an impeller passageway from an inducer to an exducer, through which the plurality of blades are configured to rotate, wherein an annular upstream housing-portion of the compressor housing forms an upstream shroud-wall substantially conforming to an upstream portion of the impeller passageway, wherein a downstream housing-portion of the compressor housing forms a downstream shroud-wall substantially conforming to a downstream portion of the impeller passageway; and
supporting the upstream housing-portion with respect to the downstream housing-portion such that they are respectively disposed to form an annular bypass port connecting an axially extending bypass passageway and the impeller passageway between the upstream and downstream shroud-walls, the step of supporting being conducted with structure that extends along a helical path along the axial extent of the bypass passageway such that the structure does not obstruct circumferentially moving surge airflow through the bypass passageway.