CN203428021U - Ducted fan - Google Patents
Ducted fan Download PDFInfo
- Publication number
- CN203428021U CN203428021U CN201320383120.5U CN201320383120U CN203428021U CN 203428021 U CN203428021 U CN 203428021U CN 201320383120 U CN201320383120 U CN 201320383120U CN 203428021 U CN203428021 U CN 203428021U
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- ducted fan
- duct
- transmission
- hold
- air
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Abstract
The utility model relates to the technical field of aviation aircrafts and in particular relates to a ducted fan. The ducted fan comprises an annular outer duct, a plurality of screw blades, a transmission shaft, a transmission supporting shaft, a transmission bearing and a transmission gear, wherein duct supporting arms are arranged on the front part and the rear part of the outer duct; the transmission supporting shaft is mounted in the center of the outer duct via the duct supporting arms; the transmission shaft is rotatably mounted in the transmission supporting shaft via the transmission bearing; the plurality of screw blades are fixed on the transmission shaft; the transmission shaft is externally connected with an engine via the transmission gear; the plurality of screw blades and the outer duct form a multi-spiral inner duct with a single-stage compression high pressure. When working, the outer duct and the multi-spiral inner duct act together to output acceleration airflows, the acceleration airflows are converged so that the ducted fan outputs high power, and therefore, the ducted fan provided by the utility model is capable of outputting larger elevating force based on the existing ducted fan and greatly saving flying cost.
Description
Technical field
The utility model relates to aviation aircraft technical field, relates in particular to a kind of ducted fan.
Background technology
At aviation field, power ducted fan lift is too small, and efficiency is too low, and large-tonnage vertical translation aircraft field still has screw propeller or multiple propeller aircraft to capture.Existing small-sized ducted fan vertical translation aircraft, mostly adopts and strengthens ducted fan revolution and strengthen duct diameter, to improve the lift of ducted fan, and strengthen rotating speed, certainly will cause the high-power power output of driving engine, causes fuel oil to waste in a large number; And that screw propeller rises wing diameter is excessive, can cause the flat windward side that flies of aircraft excessive, engine power output is most of for overcoming aircraft gravity acting, and decline process decline vortex and prominent wind can have a strong impact on flight safety.So, existing small-sized vertical lift ducted fan aircraft, its commercialization cannot be broken through always.
Utility model content
The purpose of this utility model is to provide for the deficiencies in the prior art a kind of ducted fan of exportable larger lift.
To achieve these goals, the utility model provides a kind of ducted fan, it comprises ringwise by-pass air duct, the spiral fan of multi-disc, transmission shaft, transmission pivot shaft, drive bearing, transmission gear, the front portion of described by-pass air duct, rear portion is provided with duct hold-down arm, described transmission pivot shaft is installed on the center of described by-pass air duct by described duct hold-down arm, described transmission shaft is rotatably installed in described transmission pivot shaft by described drive bearing, the spiral fan of described multi-disc is fixed on described transmission shaft, described transmission shaft is by the external driving engine of described transmission gear, the spiral fan of described multi-disc and described by-pass air duct form many spirals main duct of single-stage compression high pressure.
Preferably, described spiral fan is variable-pitch propeller flabellum, and the admission port pitch of this variable-pitch propeller flabellum is less than air extractor duct pitch, forms gas single-stage and organizes helical compression passage more; The air inlet angle of described variable-pitch propeller flabellum is progressive increasing from admission port to air extractor duct, forms many group spiral air passages that accelerate, pressurize.
Preferably, the air discharge port of described by-pass air duct is provided with the disturbing flow device that sprays total amount for controlling air.
Preferably, described duct hold-down arm comprises ducted fan hold-down arm after two large hold-down arms of front ducted fan, two little hold-down arms of front ducted fan, four, described two large hold-down arms of front ducted fan, two little hold-down arms of front ducted fan are all fixed between the inwall of by-pass air duct front portion and the front portion of transmission pivot shaft, and ducted fan hold-down arm is all fixed between the inwall at by-pass air duct rear portion and the rear portion of transmission pivot shaft after described four.
Preferably, the front end of described by-pass air duct is provided with lip, and described lip is comprised of lip under lip, ducted fan leading portion on ducted fan leading portion.
Preferably, described disturbing flow device comprises air spoiler, spoiler rail supported arm, hydraulic arm, hydraulic oil conduit, described air spoiler is installed on the air discharge port of described by-pass air duct by spoiler rail supported arm, described air spoiler is connected with hydraulic oil conduit by hydraulic arm, and described hydraulic oil conduit and external hydraulic power form loop.
Preferably, the arranged outside of described by-pass air duct turns to hold-down arm.
The utility model beneficial effect is: due to the spiral fan of multi-disc and many spirals main duct of by-pass air duct formation single-stage compression high pressure, when work, by-pass air duct of the present utility model and the combined action of many spirals main duct, air-flow is accelerated in output, and multiply is accelerated air-flow and gathered, and makes the larger power of ducted fan output, therefore, on the basis of existing ducted fan, the larger lift of the utility model output, can significantly save flight cost.
Accompanying drawing explanation
Fig. 1 is block diagram of the present utility model.
Fig. 2 is the block diagram at another visual angle of the utility model.
Fig. 3 is front view of the present utility model.
Fig. 4 is the A-A cutaway view of Fig. 3.
Fig. 5 is the block diagram of the spiral fan of multi-disc of the present utility model.
Reference numeral:
1---by-pass air duct, 1.1---lip on ducted fan leading portion, 1.2---lip under ducted fan leading portion, 2---transmission shaft, 2.1---transmission gear, 2.2---drive bearing, 3---the large hold-down arm of front ducted fan, 4---the little hold-down arm of front ducted fan, 5---turn to hold-down arm, 6---transmission pivot shaft, 7---spiral fan, 8---rear ducted fan hold-down arm, 9---air spoiler, 10---spoiler rail supported arm, 11---hydraulic arm, 12---hydraulic oil conduit.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
Please refer to Fig. 1～5, ducted fan of the present utility model, it comprises ringwise by-pass air duct 1, the spiral fan 7 of multi-disc, transmission shaft 2, transmission pivot shaft 6, drive bearing 2.2, transmission gear 2.1, the front portion of by-pass air duct 1, rear portion is provided with duct hold-down arm, transmission pivot shaft 6 is installed on the center of by-pass air duct 1 by duct hold-down arm, transmission shaft 2 is rotatably installed in transmission pivot shaft 6 by drive bearing 2.2, the spiral fan 7 of multi-disc is fixed on transmission shaft 2, transmission shaft 2 is by the external driving engine of transmission gear 2.1, the spiral fan 7 of multi-disc and by-pass air duct 1 form many spirals main duct of single-stage compression high pressure.
Preferably, spiral fan 7 is variable-pitch propeller flabellum, and the admission port pitch of this variable-pitch propeller flabellum is less than air extractor duct pitch, forms gas single-stage and organizes helical compression passage more; The air inlet angle of variable-pitch propeller flabellum is progressive increasing from admission port to air extractor duct, forms many group spiral air passages that accelerate, pressurize.Be that the utility model is under external power driven, transmission gear 2.1 drives transmission shaft 2 to drive spiral fan 7 along transmission shaft 2 coaxial rotation, the utility model adopts spiral fan 7 and the common many air-flows pressure channel that forms of ducted fan inwall, air-flow can be at each little airflow passage by spiral fan 7 helical compression progressively, and ducted fan admission port pitch is less than air extractor duct pitch, the flow inlet angle of each little gas passage progressively strengthens in helical duct, form and accelerate spiral air passage, a plurality of little duct that air is formed by main duct wall and two spiral fans 7 acceleration of pressurizeing rapidly, form multiply pressure gas.Because the flow inlet angle of little gas passage is progressively progressively to strengthen, gas accelerates smooth and easy, part obtains the effect that the multistage flabellum of turbofan carries out gas compression acceleration, forced air, avoided the sinuous flow producing between multistage flabellum simultaneously, avoid to a certain extent the resonance that between flabellum, sinuous flow causes, improved safety and the service life of aerospace parts.
Preferably, the air discharge port of by-pass air duct 1 is provided with the disturbing flow device that sprays total amount for controlling air, and disturbing flow device can spray total amount and control fast the size that ducted fan power is exported by controlling air.In the present embodiment, disturbing flow device comprises air spoiler 9, spoiler rail supported arm 10, hydraulic arm 11, hydraulic oil conduit 12, air spoiler 9 is installed on the air discharge port of by-pass air duct 1 by spoiler rail supported arm 10, air spoiler 9 is connected with hydraulic oil conduit 12 by hydraulic arm 11, and hydraulic oil conduit 12 forms loop with external hydraulic power (as: servomotor).Wherein, air spoiler 9 is positioned at the afterbody of by-pass air duct 1, and be symmetrical arranged up and down, under air spoiler 9 driven by servomotor externally, through hydraulic oil conduit 12, drive, can be fast synchronized to the inside of ducted fan, stretch out and shrink fast, realize vector flow-disturbing, to control air-flow output total amount size, reach control ducted fan and export big or small object at specific direction power, because disturbing flow device is symmetrical structure, the change of ducted fan power stage size only can, perpendicular to the acting of horizontal surface direction, can not affect the stability of other directions of aircraft.
Preferably, duct hold-down arm comprises the large hold-down arm of two front ducted fans 3, two front ducted fan ramuscule braces 4, ducted fan hold-down arm 8 after four, the large hold-down arm of two front ducted fans 3, two front ducted fan ramuscule braces 4 are all fixed between the inwall of by-pass air duct 1 front portion and the front portion of transmission pivot shaft 6, and ducted fan hold-down arm 8 is all fixed between the inwall at by-pass air duct 1 rear portion and the rear portion of transmission pivot shaft 6 after four.These duct hold-down arms, spiral fan 7 and the duct inwall that can jointly support multi-disc form many group helical compression passages.
Preferably, the front end of by-pass air duct 1 is provided with lip, and lip is comprised of lip 1.2 under lip 1.1, ducted fan leading portion on ducted fan leading portion, and this structure can realize the flat maximum lift that flies of aircraft.And by-pass air duct 1 is made ring air foil, can strengthen the lift that aircraft duct provides.
Preferably, the arranged outside of by-pass air duct 1 turns to hold-down arm 5.
Ducted fan of the present utility model adopts the spiral fan 7 momentum self-balance design methods of multi-disc, the spiral fan 7 of multi-disc under the drive of transmission shaft 2 coaxial rotating on the central axis of ducted fan by-pass air duct 1, every spiral fan 7 is variable-pitch propeller flabellum, and the admission port pitch of variable-pitch propeller flabellum is less than air extractor duct pitch.Adjacent two spiral fans 7 and by-pass air duct 1 inwall and ducted fan transmission pivot shaft 6 outer walls form a plurality of main ducts, each main duct blade flow inlet angle is less than efflux angles, under the environment of ducted fan High Rotation Speed, the ejection of formation high pressure air, by-pass air duct 1 lip forms meiobar, duct air extractor duct forms higher-pressure region, significantly promotes ducted fan pneumatic efficiency.
Therefore, the utility model at same duct diameter, with rotating speed prerequisite under, can successively pressurize, accelerate to pass through with the many helical airflow passages of single-stage air-flow, obtain multiply pressure gas, realize larger power output, in existing ducted fan, turbofan, screw propeller three, find more advantage technology solution.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not restriction to the utility model protection domain; although the utility model has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; the technical solution of the utility model is modified or is equal to replacement, all belong to protection domain of the present utility model.
Claims (7)
1. a ducted fan, it is characterized in that: comprise ringwise by-pass air duct, the spiral fan of multi-disc, transmission shaft, transmission pivot shaft, drive bearing, transmission gear, the front portion of described by-pass air duct, rear portion is provided with duct hold-down arm, described transmission pivot shaft is installed on the center of described by-pass air duct by described duct hold-down arm, described transmission shaft is rotatably installed in described transmission pivot shaft by described drive bearing, the spiral fan of described multi-disc is fixed on described transmission shaft, described transmission shaft is by the external driving engine of described transmission gear, the spiral fan of described multi-disc and described by-pass air duct form many spirals main duct of single-stage compression high pressure.
2. ducted fan according to claim 1, is characterized in that: described spiral fan is variable-pitch propeller flabellum, and the admission port pitch of this variable-pitch propeller flabellum is less than air extractor duct pitch, forms gas single-stage and organizes helical compression passage more; The air inlet angle of described variable-pitch propeller flabellum is progressive increasing from admission port to air extractor duct, forms many group spiral air passages that accelerate, pressurize.
3. ducted fan according to claim 1, is characterized in that: the air discharge port of described by-pass air duct is provided with the disturbing flow device that sprays total amount for controlling air.
4. ducted fan according to claim 1, it is characterized in that: described duct hold-down arm comprises ducted fan hold-down arm after two large hold-down arms of front ducted fan, two little hold-down arms of front ducted fan, four, described two large hold-down arms of front ducted fan, two little hold-down arms of front ducted fan are all fixed between the inwall of by-pass air duct front portion and the front portion of transmission pivot shaft, and ducted fan hold-down arm is all fixed between the inwall at by-pass air duct rear portion and the rear portion of transmission pivot shaft after described four.
5. ducted fan according to claim 1, is characterized in that: the front end of described by-pass air duct is provided with lip, and described lip is comprised of lip under lip, ducted fan leading portion on ducted fan leading portion.
6. ducted fan according to claim 3, it is characterized in that: described disturbing flow device comprises air spoiler, spoiler rail supported arm, hydraulic arm, hydraulic oil conduit, described air spoiler is installed on the air discharge port of described by-pass air duct by spoiler rail supported arm, described air spoiler is connected with hydraulic oil conduit by hydraulic arm, and described hydraulic oil conduit and external hydraulic power form loop.
7. ducted fan according to claim 1, is characterized in that: the arranged outside of described by-pass air duct turns to hold-down arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320383120.5U CN203428021U (en) | 2013-06-28 | 2013-06-28 | Ducted fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320383120.5U CN203428021U (en) | 2013-06-28 | 2013-06-28 | Ducted fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203428021U true CN203428021U (en) | 2014-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320383120.5U Expired - Fee Related CN203428021U (en) | 2013-06-28 | 2013-06-28 | Ducted fan |
Country Status (1)
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| CN (1) | CN203428021U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105416572A (en) * | 2015-12-02 | 2016-03-23 | 西北工业大学 | Vectored thrust ducted propeller |
| CN106477025A (en) * | 2015-09-02 | 2017-03-08 | 中国航空工业第六八研究所 | A kind of small-sized electrically driven (operated) aircraft power propulsion system |
| TWI620686B (en) * | 2017-05-19 | 2018-04-11 | 林瑤章 | Propulsion device |
| CN108177784A (en) * | 2017-12-14 | 2018-06-19 | 顺丰科技有限公司 | Attachment device and ducted fan and unmanned plane on power-equipment |
| TWI627104B (en) * | 2017-05-31 | 2018-06-21 | 大鵬航太有限公司 | Simple Pitch Control Device for Dual-Mode Aircraft with VTOL and Fixed-Wing Flight |
| CN110697026A (en) * | 2018-04-25 | 2020-01-17 | 珠海市磐石电子科技有限公司 | Power device and aircraft |
| CN110979661A (en) * | 2019-11-29 | 2020-04-10 | 沈观清 | Multi-element ducted fan for vertical take-off and landing aircraft |
| RU2793819C1 (en) * | 2022-07-01 | 2023-04-06 | Владимир Викторович Михайлов | Air screw with cansoled blades |
-
2013
- 2013-06-28 CN CN201320383120.5U patent/CN203428021U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106477025A (en) * | 2015-09-02 | 2017-03-08 | 中国航空工业第六八研究所 | A kind of small-sized electrically driven (operated) aircraft power propulsion system |
| CN105416572A (en) * | 2015-12-02 | 2016-03-23 | 西北工业大学 | Vectored thrust ducted propeller |
| CN105416572B (en) * | 2015-12-02 | 2017-07-07 | 西北工业大学 | A kind of ducted fan vector propulsion system |
| TWI620686B (en) * | 2017-05-19 | 2018-04-11 | 林瑤章 | Propulsion device |
| TWI627104B (en) * | 2017-05-31 | 2018-06-21 | 大鵬航太有限公司 | Simple Pitch Control Device for Dual-Mode Aircraft with VTOL and Fixed-Wing Flight |
| CN108177784A (en) * | 2017-12-14 | 2018-06-19 | 顺丰科技有限公司 | Attachment device and ducted fan and unmanned plane on power-equipment |
| CN110697026A (en) * | 2018-04-25 | 2020-01-17 | 珠海市磐石电子科技有限公司 | Power device and aircraft |
| CN110979661A (en) * | 2019-11-29 | 2020-04-10 | 沈观清 | Multi-element ducted fan for vertical take-off and landing aircraft |
| RU2793819C1 (en) * | 2022-07-01 | 2023-04-06 | Владимир Викторович Михайлов | Air screw with cansoled blades |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140212 Termination date: 20140628 |
|
| EXPY | Termination of patent right or utility model |