REDUCED NOISE COMPRESSOR RECIRCULATION

摘要

An air flow-enhancing insert (30) is configured to be inserted into the air inlet (16) of a compressor (3). The insert includes a hollow, cylindrical inner member (32) and lugs (44) protruding outward from an outer surface (36) of the inner member, each lug having an elongated cross sectional shape and including a leading edge (46), a trailing edge (48), and a long axis (50) that extends between the leading edge and trailing edge, the long axis defining a helix about the outer surface. When the insert (30) is disposed in the compressor air inlet, an air recirculation path (20) is defined between the inner member outer surface, an inner surface (17) of the air inlet, and the lugs. The air recirculation path improves air flow in the compressor, whereby compressor efficiency is improved and noise is reduced.

主权项

1. An exhaust gas turbocharger (1) comprising:
a turbine section (2) including a turbine wheel (4); a compressor section (3) including a compressor housing (12) defining an air inlet (16); a compressor wheel (5) disposed within the compressor housing (12) adjacent to the air inlet (16), the compressor wheel (5) connected to the turbine wheel (4) via a shaft (6); an air flow-enhancing insert (30) disposed in the air inlet (16), the insert (30) comprising
a hollow, cylindrical inner member (32) including a longitudinal axis and an outer surface; andlugs (44) protruding outward from the outer surface (36) of the inner member (32), each lug (44) having an elongated cross sectional shape and including a leading edge (46), a trailing edge (48), and a long axis (50) that extends between the leading edge (46) and trailing edge (48), the long axis (50) defining a helix about the outer surface (36), wherein an air recirculation channel (20) is defined between the inner member (32) outer surface (36), an inner surface (17) of the air inlet (16), and the lugs (44).