US 12,442,387 B2
Compressor impeller
Oleg Guriev, Huddersfield (GB)
Assigned to Cummins Ltd, London (GB)
Appl. No. 18/699,560
Filed by Cummins Ltd, London (GB)
PCT Filed Oct. 7, 2022, PCT No. PCT/GB2022/052552
§ 371(c)(1), (2) Date Apr. 8, 2024,
PCT Pub. No. WO2023/057774, PCT Pub. Date Apr. 13, 2023.
Claims priority of application No. 2114407 (GB), filed on Oct. 8, 2021.
Prior Publication US 2024/0401606 A1, Dec. 5, 2024
Int. Cl. F04D 29/30 (2006.01); B33Y 80/00 (2015.01); F04D 17/10 (2006.01); F04D 29/28 (2006.01)
CPC F04D 29/30 (2013.01) [B33Y 80/00 (2014.12); F04D 17/10 (2013.01); F04D 29/284 (2013.01); F05D 2220/40 (2013.01); F05D 2230/20 (2013.01); F05D 2240/305 (2013.01); F05D 2250/712 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A centrifugal impeller for a compressor of a turbocharger, the impeller comprising:
a hub extending along an impeller axis; and
a blade extending from the hub, the blade defining a pressure surface and a suction surface;
wherein the pressure surface comprises a concave portion,
wherein the blade defines a leading edge and a trailing edge, and the pressure surface defines a stream-wise contour extending between the leading edge and the trailing edge, the stream-wise contour defining a stream-wise contour length,
wherein the concave portion is at least partially positioned within a region extending from a first position of the stream-wise contour to a second position of the stream-wise contour, the first position of the stream-wise contour being spaced from the leading edge by at least around 10% of the stream-wise contour length and the second position of the stream-wise contour being spaced from the leading edge by at most around 90% of the stream-wise contour length, and
wherein no part of the pressure surface of the blade is concave between the first position of the stream-wise contour and the leading edge and no part of the pressure surface is concave between the second position of the stream-wise contour and the trailing edge.