US 12,435,730 B2
Impeller of centrifugal compressor and centrifugal compressor
Kenichiro Iwakiri, Tokyo (JP); Yutaka Fujita, Tokyo (JP); Tadashi Kanzaka, Tokyo (JP); and Hironori Honda, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
Appl. No. 18/015,816
Filed by MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
PCT Filed Aug. 5, 2020, PCT No. PCT/JP2020/030031
§ 371(c)(1), (2) Date Jan. 12, 2023,
PCT Pub. No. WO2022/029932, PCT Pub. Date Feb. 10, 2022.
Prior Publication US 2023/0258197 A1, Aug. 17, 2023
Int. Cl. F04D 29/28 (2006.01); F04D 17/10 (2006.01); F04D 29/30 (2006.01); F04D 29/44 (2006.01)
CPC F04D 29/284 (2013.01) [F04D 17/10 (2013.01); F04D 29/30 (2013.01); F04D 29/441 (2013.01); F05D 2220/40 (2013.01); F05D 2240/304 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An impeller of a centrifugal compressor, comprising: a hub; and at least one blade disposed on a hub surface of the hub,
wherein a hub-side end of a trailing edge of the at least one blade
is located radially outward of an outer peripheral portion of the hub, and
is located on a first line extending radially outward from the hub surface of the hub, the first line extending along a direction perpendicular to an axial direction of the impeller,
wherein a shroud-side end of the trailing edge is located radially outward of the hub-side end,
wherein the at least one blade includes a blade root outer peripheral portion connecting the hub-side end of the trailing edge and the outer peripheral portion of the hub, the blade root outer peripheral portion being an edge of the blade, and
wherein the blade root outer peripheral portion has a chamfer edge or a concave round chamfer edge disposed inside a clearance, the clearance formed between the hub and a housing.