Tilting closed-wing aircraft
US-2020398977-A1 · Dec 24, 2020 · US
Ducted fan device and aircraft
US2021293252A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021293252-A1 |
| Application number | US-202117158624-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 26, 2021 |
| Priority date | Mar 23, 2020 |
| Publication date | Sep 23, 2021 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A ducted fan device includes, a plurality of fan devices, each including a fan configured to rotate about an axis to generate an air flow, and a small duct having a cylindrical shape surrounding the fan about the axis and extending in a direction of the axis, and a large duct having a tubular shape surrounding all of the fan devices. The plurality of fan devices includes a central fan device, and a plurality of peripheral fan devices disposed at an outer peripheral of the small duct included in the central fan device.
First claim
Opening claim text (preview).
1 . A ducted fan device, comprising: a plurality of fan devices, each including a fan configured to rotate about an axis to generate an air flow, and a small duct having a cylindrical shape surrounding the fan about the axis and extending in a direction of the axis; and a large duct having a tubular shape surrounding all of the plurality of fan devices, wherein the plurality of fan devices include a central fan device, and a plurality of peripheral fan devices disposed at an outer peripheral of the small duct included in the central fan device. 2 . The ducted fan device according to claim 1 , wherein each axis of the plurality of peripheral fan devices is disposed on a concentric circle centered on the axis of the central fan device. 3 . The ducted fan device according to claim 2 , wherein the large duct has a cylindrical shape centered on the axis of the central fan device. 4 . The ducted fan device according to claim 2 comprising a plurality of the central fan devices. 5 . The ducted fan device according to claim 1 , wherein the axis of the peripheral fan device adjacent to the large duct is inclined toward the adjacent large duct. 6 . The ducted fan device according to claim 2 , wherein the axis of the peripheral fan device adjacent to the large duct is inclined toward the adjacent large duct. 7 . The ducted fan device according to claim 3 , wherein the axis of the peripheral fan device adjacent to the large duct is inclined toward the adjacent large duct. 8 . The ducted fan device according to claim 4 , wherein the axis of the peripheral fan device adjacent to the large duct is inclined toward the adjacent large duct. 9 . The ducted fan device according to claim 1 , wherein when a diameter of each small duct is D, a clearance between the small duct of the central fan device and the small duct of each peripheral fan device is 0.5D or more and 1.5D or less. 10 . The ducted fan device according to claim 2 , wherein when a diameter of each small duct is D, a clearance between the small duct of the central fan device and the small duct of each peripheral fan device is 0.5D or more and 1.5D or less. 11 . The ducted fan device according to claim 3 , wherein when a diameter of each small duct is D, a clearance between the small duct of the central fan device and the small duct of each peripheral fan device is 0.5D or more and 1.5D or less. 12 . The ducted fan device according to claim 4 , wherein when a diameter of each small duct is D, a clearance between the small duct of the central fan device and the small duct of each peripheral fan device is 0.5D or more and 1.5D or less. 13 . The ducted fan device according to claim 5 , wherein when a diameter of each small duct is D, a clearance between the small duct of the central fan device and the small duct of each peripheral fan device is 0.5D or more and 1.5D or less. 14 . The ducted fan device according to claim 1 , wherein each fan device is individually driven by an electric motor, and includes a control unit that individually controls each electric motor. 15 . An aircraft, comprising the ducted fan device according to claim 1 .
Assignees
Inventors
Classifications
- F04D29/545Primary
Ducts · CPC title
Power plant control systems; Arrangement of power plant control systems in aircraft · CPC title
- B64C29/0025Primary
the propellers being fixed relative to the fuselage · CPC title
- B64C27/20Primary
Rotorcraft characterised by having shrouded rotors, e.g. flying platforms · CPC title
Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft (rotorcraft B64C27/00) · CPC title
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Frequently asked questions
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- What does patent US2021293252A1 cover?
- A ducted fan device includes, a plurality of fan devices, each including a fan configured to rotate about an axis to generate an air flow, and a small duct having a cylindrical shape surrounding the fan about the axis and extending in a direction of the axis, and a large duct having a tubular shape surrounding all of the fan devices. The plurality of fan devices includes a central fan device, a…
- Who is the assignee on this patent?
- Mitsubishi Heavy Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification F04D29/545. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Sep 23 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).