Extended wheel tip and back-disk cavity
AssigneeGarrett Transportation I Inc.
InventorsJunfei Yin, Daniel Zhang
Life of this patent
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Abstract
A compressor having a housing along with a wheel including a hub and a plurality of impellers defining flow channels is disclosed. The hub forms a flow surface that defines a concave surface-curve from an inducer end to an inflection point, and a convex surface from the inflection point to an exducer end of the flow surface. The hub forms a back-disk surface including a circumferential edge-channel inset from and surrounding a central portion. The housing includes a conical inner-diffuser wall surrounding a circular inset wall. The central portion of the back-disk surface is received by the conical inner-diffuser wall, while the exducer end of the flow surface extends radially outward to be axially over an inner portion of the inner-diffuser wall.
Claims19
A compressor wheel configured to compress a fluid, the compressor wheel comprising:
- a hub defining an axis-of-rotation, the hub forming a flow surface extending from an inducer end to an exducer end of the flow surface, the flow surface facing in a first axial direction, and the hub forming a back-disk surface facing in a second axial direction opposite the first axial direction, wherein the flow surface, taken meridionally, defines a surface-curve from the inducer end to the exducer end of the flow surface;
- a plurality of impellers extending from the flow surface;
- and
- wherein the surface-curve establishes a concave curvature from the inducer end to an identifiable inflection point;
- and
- wherein the surface-curve smoothly transitions to and establishes a non-concave curvature from the inflection point to the exducer end;
- wherein the back-disk surface includes a central portion concentric with the axis-of-rotation, and
- wherein the back-disk surface includes a circumferential edge-channel insert from, and concentrically surrounding, the central portion.
A compressor, comprising:
- a hub defining an axis-of-rotation, the hub forming a flow surface extending from an inducer end to an exducer end of the flow surface, the flow surface facing in a first axial direction, and the hub forming a back-disk surface facing in a second axial direction opposite the first axial direction, wherein the flow surface, taken meridionally, defines a surface-curve from the inducer end to the exducer end of the flow surface;
- a plurality of impellers extending from the flow surface;
- a housing configured to mount the compressor wheel for rotation within the housing and around the axis-of-rotation;
- and
- wherein the surface-curve establishes a concave curvature from the inducer end to an identifiable inflection point;
- and
- wherein the surface-curve smoothly transitions to and establishes a non-concave curvature from the inflection point to the exducer end;
- wherein the back-disk surface includes a central portion concentric with the axis-of-rotation;
- and
- wherein the back-disk surface includes a circumferential edge-channel inset from, and concentrically surrounding, the central portion.
A turbocharger, comprising:
- a hub defining an axis-of-rotation, the hub forming a flow surface extending from an inducer end to an exducer end of the flow surface, the flow surface facing in a first axial direction, and the hub forming a back-disk surface facing in a second axial direction opposite the first axial direction, wherein the flow surface, taken meridionally, defines a surface-curve from the inducer end to the exducer end of the flow surface;
- a plurality of impellers extending from the flow surface;
- a housing configured to mount a compressor wheel for rotation within the housing and around the axis-of-rotation;
- a turbine connected to drive the compressor wheel in rotation;
- and
- wherein the surface-curve establishes a concave curvature from the inducer end to an identifiable inflection point;
- wherein the surface-curve smoothly to and establishes a non-concave curvature from the inflection point to the exducer end;
- wherein the back-disk surface includes a central portion concentric with the axis-of-rotation;
- and
- wherein the back-disk surface includes a circumferential edge-channel inset from, and concentrically surrounding, the central portion.
Dependencies are inferred from the claim text.