IP Library › Granted Patent US 12680555
Granted Patent B2
US 12680555 · App. 19/266,694 · Granted Jul 14, 2026

Centrifugal compressor

Inventor: Ryuta Tanaka (Tokyo, JP)
Assignee: IHI Corporation
F04D29/444F04D17/10
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Quick Facts
Patent No.
US 12680555
App. No.
19/266,694
Granted
Jul 14, 2026
Kind
B2
Abstract

Provided is a centrifugal compressor, including: a compressor impeller; and a plurality of diffuser blades arranged on an outer side of the compressor impeller in a radial direction so as to be spaced apart from each other in a circumferential direction of the compressor impeller, the diffuser blades each with: a blade angle having a local maximum value, the blade angle being an angle formed between a center line of the diffuser blade and the radial direction; and a thickness having a local maximum on a downstream side of a position at which the blade angle has the local maximum value.

Claims (13)

1 . A centrifugal compressor, comprising:

a compressor impeller; and

a plurality of diffuser blades arranged on an outer side of the compressor impeller in a radial direction so as to be spaced apart from each other in a circumferential direction of the compressor impeller, the plurality of diffuser blades each with: a blade angle having a local maximum value, the blade angle being an angle formed between a center line of the diffuser blade and the radial direction; and a thickness having a local maximum on a downstream side of a position at which the blade angle has the local maximum value,

wherein the blade angle monotonically increases as approaching from an upstream end of the diffuser blade toward the position at which the blade angle has the local maximum value, and monotonically decreases as approaching from the position at which the blade angle has the local maximum value toward a downstream end of the diffuser blade.

2 . The centrifugal compressor according to claim 1 ,

wherein the plurality of diffuser blades include a first diffuser blade and a second diffuser blade adjacent to the first diffuser blade in a rotating direction of the compressor impeller, and

wherein the blade angle of the second diffuser blade has the local maximum value at a position on the second diffuser blade, the position corresponding to a position that is orthogonal to a center line of the first diffuser blade and is opposed to a downstream end of the first diffuser blade.

3 . The centrifugal compressor according to claim 1 ,

wherein the plurality of diffuser blades include a first diffuser blade and a second diffuser blade adjacent to the first diffuser blade in a rotating direction of the compressor impeller, and

wherein the thickness of the first diffuser blade has the local maximum at a position on the first diffuser blade, the position corresponding to a position that is orthogonal to a center line of the second diffuser blade and is opposed to an upstream end of the second diffuser blade.

4 . The centrifugal compressor according to claim 2 ,

wherein the plurality of diffuser blades include a first diffuser blade and a second diffuser blade adjacent to the first diffuser blade in a rotating direction of the compressor impeller, and

wherein the thickness of the first diffuser blade has the local maximum at a position on the first diffuser blade, the position corresponding to a position that is orthogonal to a center line of the second diffuser blade and is opposed to an upstream end of the second diffuser blade.