Compressor gas flow deflector and compressor incorporating the same

摘要

A turbocharger compressor includes a compressor housing having a housing wall that includes a shroud that defines a central air channel and a compressor inlet in fluid communication with the central channel and an inlet duct. It also includes a compressor wheel configured to draw air into the compressor inlet from the inlet duct and create a main airflow in the central air channel axially toward a compressor outlet. The compressor also includes a bypass channel that extends between an opening in the main channel located between the compressor inlet and compressor outlet proximate the compressor blades and the compressor inlet. The compressor also includes a deflector that includes a deflector surface that is configured to direct a bypass airflow in the bypass channel, and flowing in a direction from the main channel toward the compressor inlet, into the compressor inlet axially and radially inwardly toward the compressor wheel.

主权项

1. A compressor for a turbocharger, comprising:
a compressor housing, the compressor housing having a housing wall, the housing wall comprising a shroud having an inner wall that defines a central air channel of the compressor, the shroud defining a compressor inlet in fluid communication with the central channel; an inlet duct that is sealingly disposed over the compressor inlet, the inlet duct comprising a duct air channel that is configured to provide air to the compressor inlet and main air channel; a compressor wheel rotatably disposed within the shroud proximate the inner wall and attached to a driven shaft, the wheel comprising a plurality of circumferentially-spaced, axially-extending compressor blades that radially protrude from a hub, the blades configured to draw air into the compressor inlet from the inlet duct and create a main airflow in the central air channel axially toward a compressor outlet upon rotation of the wheel; a bypass channel that extends between an opening in the main channel located between the compressor inlet and compressor outlet proximate the compressor blades and the compressor inlet; and a deflector comprising a deflector surface that is configured to direct a bypass airflow in the bypass channel, and flowing in a direction from the main channel toward the compressor inlet, into the compressor inlet axially and radially inwardly toward the compressor wheel, wherein a peripherally extending groove is formed in the deflector surface.