Fan and electronic device
US-2024318662-A1 · Sep 26, 2024 · US
Centrifugal compressor and turbocharger
US10066638B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10066638-B2 |
| Application number | US-201514950094-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 24, 2015 |
| Priority date | Aug 6, 2013 |
| Publication date | Sep 4, 2018 |
| Grant date | Sep 4, 2018 |
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Abstract
Official abstract text for this publication.
An annular diffuser is formed on an outlet side of a wheel in a housing. A shroud-side wall surface and a hub-side wall surface of the diffuser are parallel to a radial direction, respectively. A plurality of annular steps is formed on the shroud-side wall surface of the diffuser. Each step is formed so as to expand a flow passage width of the diffuser along a flow direction of a main flow.
First claim
Opening claim text (preview).
What is claimed is: 1. A centrifugal compressor configured to compress a fluid utilizing a centrifugal force, comprising: a housing having a shroud thereinside; a wheel rotatably provided in the housing; a diffuser formed outside in a radial direction of an outlet side of the wheel in the housing; and a scroll formed on an outlet side of the diffuser in the housing, wherein a shroud-side wall surface and a hub-side wall surface of the diffuser extend in the radial direction, respectively, wherein a plurality of steps is formed on the shroud-side wall surface of the diffuser so as to expand a flow passage width of the diffuser along a flow direction of a main flow, and wherein a step amount of each step is set to be 5 to 30% of a flow passage width of an outlet of the diffuser. 2. The centrifugal compressor according to claim 1 , wherein a radial direction length of a portion continuous with an outside in a radial direction of each step in the shroud-side wall surface of the diffuser is set to be 5 to 30 times of a step amount of each step. 3. The centrifugal compressor according to claim 2 , wherein the plurality of steps is formed annularly. 4. The centrifugal compressor according to claim 1 , wherein the plurality of steps is formed annularly. 5. A turbocharger comprising the centrifugal compressor according to claim 1 . 6. The centrifugal compressor according to claim 1 , wherein the plurality of steps is integrally formed with the shroud-side wall surface of the diffuser. 7. A centrifugal compressor configured to compress a fluid utilizing a centrifugal force, comprising: a housing having a shroud thereinside; a wheel rotatably provided in the housing; a diffuser formed outside in a radial direction of an outlet side of the wheel in the housing; and a scroll formed on an outlet side of the diffuser in the housing, wherein a shroud-side wall surface and a hub-side wall surface of the diffuser extend in the radial direction, respectively, wherein a plurality of steps is formed on the shroud-side wall surface of the diffuser so as to expand a flow passage width of the diffuser along a flow direction of a main flow, and wherein a radial direction length of a portion continuous with an outside in a radial direction of each step in the shroud-side wall surface of the diffuser is set to be 5 to 30 times of a step amount of each step. 8. The centrifugal compressor according to claim 7 , wherein the plurality of steps is formed annularly. 9. A turbocharger comprising the centrifugal compressor according to claim 7 . 10. The centrifugal compressor according to claim 7 , wherein the plurality of steps is integrally formed with the shroud-side wall surface of the diffuser.
Assignees
Inventors
Classifications
in turbochargers · CPC title
for compressors · CPC title
Engines characterised by provision of pumps driven at least for part of the time by exhaust · CPC title
especially adapted for elastic fluid pumps · CPC title
Outlet · CPC title
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Frequently asked questions
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- What does patent US10066638B2 cover?
- An annular diffuser is formed on an outlet side of a wheel in a housing. A shroud-side wall surface and a hub-side wall surface of the diffuser are parallel to a radial direction, respectively. A plurality of annular steps is formed on the shroud-side wall surface of the diffuser. Each step is formed so as to expand a flow passage width of the diffuser along a flow direction of a main flow.
- Who is the assignee on this patent?
- Ihi Corp
- What technology area does this patent fall under?
- Primary CPC classification F04D29/441. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Sep 04 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).