JP2014118833A5 - - Google Patents

Claims (10)

In the compressor that compresses the gas flowing in from the axial direction and flows out in the radial direction or obliquely with respect to the axial direction,
A rotation axis;
An impeller rotating with the rotating shaft;
A compressor housing that rotatably accommodates the impeller,
The impeller includes a hub fixed to the rotating shaft, and a plurality of main wings provided to protrude from the hub.
The front edge of the main wing, when viewing the impeller in the axial direction, at least 50% of the positions of the blade length extending outward in the radial direction passing through the rotation center and the proximal end of the leading edge, the radial compressor, characterized in that inclined in the rotational direction relative to the radial direction towards the outside. Claim the leading edge of the main wing, at least 40% to 80% of the range of the blade length, and being inclined in the rotational direction relative to the radial direction towards the outside in the radial direction The compressor according to 1. The compressor according to claim 2, wherein a maximum inclination angle in a range of 40% to 80% of the blade length is in a range of 3 to 20 degrees with respect to the radial direction. The front edge of the main wing, when viewing the impeller in the axial direction, the inner ends of the radial, inclined in the rotational direction relative to the radial direction towards the inside in the radial direction The compressor according to any one of claims 1 to 3, wherein the compressor is provided. The front edge of the main wing, when viewing the impeller in the axial direction, the outer end portion of said radial, on the opposite side to the rotation direction with respect to the radial direction towards the outside in the radial direction The compressor according to any one of claims 1 to 4, wherein the compressor is inclined.   When the leading edge of the main wing visually recognizes the impeller from the meridional direction, at a position of at least 50% of the blade height extending to the shroud side of the compressor housing, the direction toward the axis perpendicular to the shroud side The compressor according to any one of claims 1 to 5, wherein the compressor is inclined upstream.   The leading edge of the main wing is continuously inclined toward the upstream side with respect to the direction perpendicular to the axis toward the shroud within a range of 40% to 80% of the blade height. The compressor described in 1.   The compressor according to claim 7, wherein a maximum inclination angle in a range of 40% to 80% of the blade height is in a range of 10 to 30 degrees with respect to a direction perpendicular to the axis.   When the impeller is viewed from the meridional direction, the leading edge of the main wing is inclined toward the upstream side with respect to the direction perpendicular to the axis toward the hub side at the end of the hub side. The compressor according to any one of claims 6 to 8.   When the impeller is viewed from the meridional direction, the leading edge of the main wing is inclined toward the shroud side toward the downstream side with respect to the direction perpendicular to the axis toward the shroud side. The compressor according to any one of claims 6 to 9.