CN114180032A - Variable outlet duct system - Google Patents
Variable outlet duct system Download PDFInfo
- Publication number
- CN114180032A CN114180032A CN202111382489.XA CN202111382489A CN114180032A CN 114180032 A CN114180032 A CN 114180032A CN 202111382489 A CN202111382489 A CN 202111382489A CN 114180032 A CN114180032 A CN 114180032A
- Authority
- CN
- China
- Prior art keywords
- duct
- outlet
- lip
- variable
- mounting ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000013013 elastic material Substances 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 8
- 239000012858 resilient material Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000005489 elastic deformation Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
- B64C21/02—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
- B64C21/08—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like adjustable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U50/00—Propulsion; Power supply
- B64U50/10—Propulsion
- B64U50/13—Propulsion using external fans or propellers
- B64U50/14—Propulsion using external fans or propellers ducted or shrouded
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Air-Flow Control Members (AREA)
Abstract
The invention provides a variable outlet ducted system, the ducted outlet (6) comprising: the device comprises a duct wall interface (61), an elastic lip (62), an outlet mounting ring (63), a supporting spring (64), a variable lip bracket (65), a driving rod (66) and a driving seat (67); the duct wall interface (61), the elastic lip (62) and the outlet mounting ring (63) are all annular and are sequentially connected from top to bottom; the supporting spring (64) is in a horn mouth shape, and a plurality of variable lip brackets (65) are arranged along the circumferential direction of the supporting spring (64); the variable lip supports (65) are connected with a driving seat (67) through a driving rod (66), and the driving seat (67) drives the driving rod (66) to drive the variable lip supports (65) to move, so that the diameter and the shape of the elastic lip (62) are changed. The diameter of the outlet of the duct is variable, so that the environment friendliness of the duct system can be improved, and the flying efficiency can be improved in the forward flying process.
Description
Technical Field
The invention belongs to the technical field of aviation, and particularly relates to a variable outlet duct system.
Background
The rotor system generates lift through the rotation of self, but for the aircraft provides lift and the propulsive force of VTOL, nevertheless because rotatory rotor exists the injury threat to personnel and environment on every side, the event has appeared the rotor system that has the duct protection, duct system promptly, and the duct not only plays the guard action in duct system, also can provide extra lift simultaneously, can improve flight efficiency, but corresponding reduction size reduces rotor weight.
However, the lower washing air flow generated by the light-weight small-size duct system is large, the influence on the environment is large, the dust raising effect is more obvious, and the like.
Disclosure of Invention
The invention provides a variable outlet duct system, which solves the problems that the weight of a helicopter is too large due to an overlarge existing duct, and the influence on the environment is large due to an undersize existing duct.
The present invention provides a variable outlet ducted system, comprising: a duct 1; the duct outlet 6 of the duct 1 comprises: a culvert wall interface 61, an elastic lip 62, an outlet mounting ring 63, a supporting spring 64, a variable lip bracket 65, a driving rod 66 and a driving seat 67;
the culvert wall interface 61, the elastic lip 62 and the outlet mounting ring 63 are all annular and are sequentially connected from top to bottom, the culvert wall interface 61 is in transitional connection with the culvert wall surface 5 of the culvert 1, and the outlet mounting ring 63 is connected with the shell of the culvert 1;
the supporting spring 64 is in a bell mouth shape, is supported on the inner side of the elastic lip 62, and is provided with a plurality of variable lip brackets 65 along the circumferential direction of the supporting spring 64, wherein the supporting spring 64 and the plurality of variable lip brackets 65 are used for supporting the appearance of the elastic lip 62;
the variable lip bracket 65 is connected with a driving seat 67 through a driving rod 66, and the driving seat 67 drives the driving rod 66 to drive the variable lip bracket 65 to move so as to drive the supporting spring 64 to deform, so that the diameter and the shape of the elastic lip 62 are changed.
Alternatively, the outlet mounting ring 63 is formed of an adjustable diameter round spring ring and a resilient material.
Optionally, the outlet mounting ring 63 is made of an elastic material in connection with the housing of the duct 1.
Optionally, when the diameter of the duct outlet 6 is increased, the diameter of the duct outlet can reach 1.2-2 times of the original diameter.
Optionally, the variable lip support 65 is in a long strip shape, and two ends of the variable lip support are respectively connected to the duct wall interface 61 and the outlet mounting ring 63.
Optionally, one end of the supporting spring 64 is connected to the duct wall interface 61, and the other end is connected to the outlet mounting ring 63.
Optionally, an installation joint is disposed between the supporting spring 64 and the variable lip brackets 65, and is used for driving each variable lip bracket 65 to bend along with the change of the size of the bell mouth of the supporting spring 64 when the supporting spring 64 deforms.
Optionally, the variable-outlet ducted system further comprises: the rotor wing 2 and the rotor wing mounting support 3;
The present invention provides a variable outlet ducted system, comprising: a duct 1; the duct outlet 6 of the duct 1 comprises: a culvert wall interface 61, an elastic lip 62, an outlet mounting ring 63, a supporting spring 64, a variable lip bracket 65, a driving rod 66 and a driving seat 67; the culvert wall interface 61, the elastic lip 62 and the outlet mounting ring 63 are all annular and are sequentially connected from top to bottom, the culvert wall interface 61 is in transitional connection with the culvert wall surface 5 of the culvert 1, and the outlet mounting ring 63 is connected with the shell of the culvert 1; the supporting spring 64 is in a bell mouth shape, is supported on the inner side of the elastic lip 62, and is provided with a plurality of variable lip brackets 65 along the circumferential direction of the supporting spring 64, wherein the supporting spring 64 and the plurality of variable lip brackets 65 are used for supporting the appearance of the elastic lip 62; the variable lip bracket 65 is connected with a driving seat 67 through a driving rod 66, and the driving seat 67 drives the driving rod 66 to drive the variable lip bracket 65 to move so as to drive the supporting spring 64 to deform, so that the diameter and the shape of the elastic lip 62 are changed. By enlarging the diameter of the outlet of the duct, the flow speed of the washing air under the duct is reduced, the environmental friendliness of the duct system is improved, and the taking-off and landing environmental adaptability of the duct system is improved; meanwhile, the ducted system can be reduced in size when flying forwards, the flying resistance is reduced, and the flying efficiency is improved. The aerodynamic load is large when flying forward, and the contracted elastic elements, the support frames and other structures are more suitable for large-load scene application; the aerodynamic load is smaller when the vertical take-off and landing are carried out, and the stretched elastic material can be adapted.
Drawings
Figure 1 is a schematic structural view of a prior ducted system;
FIG. 2 is a schematic structural view of a variable outlet ducted system provided by the present invention;
FIG. 3 is a schematic view of the internal structure of the outlet of the variable outlet ducted system provided by the present invention;
FIG. 4 is a schematic view of a variable outlet ducted system provided by the present invention in a state where the outlet is reduced in size;
FIG. 5 is a schematic view of the variable outlet ducted system of the present invention in a state where the outlet is enlarged;
FIG. 6 is a schematic view of the variable outlet ducted system of the present invention in a second state when the outlet is enlarged;
description of reference numerals:
1-a duct; 2, a rotor wing; 3, mounting a support for a rotor wing;
4-a duct inlet; 5-duct wall surface; 6-a duct outlet;
61-duct wall interface; 62-elastic lip; 63-an outlet mounting ring;
64-a support spring; 65-variable lip mount; 66-a drive rod;
67-drive seat.
Detailed Description
The variable outlet duct system provided by the present invention will be explained with reference to the accompanying drawings.
On the premise of considering the same lift force requirement, the lower washing air flow speed generated by the large-size rotor wing system is low, the environment is friendly, but the weight of the large-size rotor wing and the duct is increased, so that the self weight of the aircraft is overlarge; and the lower washing air flow generated by the small-sized duct system with light weight is large, and the influence on the environment is large, such as the dust raising effect is more obvious. Therefore, a ducted system with a variable outlet diameter is needed, the size and the weight are kept small, but the ducted outlet can be enlarged during vertical lifting, so that outlet airflow is better diffused, the influence area of the ducted airflow is increased, the lower washing airflow speed of the ducted outlet is reduced, and the environment friendliness is improved. According to the variable outlet duct system, the size of the duct outlet can be enlarged during vertical take-off and landing, the speed of lower washing air is reduced, the environment friendliness is improved, the overall smaller size is kept, the weight of an aircraft is reduced, the carrying efficiency is improved, the size of the duct outlet is reduced during forward flight cruising, the windward area is reduced, the resistance is reduced, and the flying efficiency is improved.
Specifically, referring to fig. 1-6, the present invention provides a variable outlet ducted system, comprising: the device comprises a duct 1, a rotor 2, a rotor mounting support 3, a duct inlet 4, a duct wall surface 5 and a duct outlet 6; wherein the content of the first and second substances,
the duct outlet 6 includes: culvert wall interface 61, elastomeric lip 62, exit mounting ring 63, support spring 64, variable lip mount 65, drive rod 66, and drive seat 67.
The rotor 2 is installed on the duct 1 through a rotor installation support 3, the rotor 2 is driven to rotate through a power output shaft of a motor or an engine, the rotor rotates to generate required lift force or thrust, according to the flowing direction of airflow, a duct arc-shaped chamfer lip at the position where the airflow enters is called a duct inlet 4, and a duct lip at the position where the airflow leaves is called a duct outlet 6. The culvert inlet and the culvert outlet play roles in guiding and improving the efficiency of the rotor flow, the culvert inlet is contracted, the air flow speed can be improved, and the small-sized culvert can drive more air and generate more lift force; the ducted outlet is expanded, so that the area of the outlet airflow is increased, the speed is reduced, and the environmental friendliness is improved.
As shown in fig. 3, the variable outlet duct system is connected with the duct wall surface 5 through a duct wall interface 61 and ensures continuity of the pneumatic shape of the duct inner wall composed of the duct inlet 4, the duct wall surface 5 and the duct outlet 6, at this time, the pneumatic shape of the duct outlet 6 is mainly composed of an elastic lip 62, and continuity of the pneumatic shape under different duct diameters is ensured through elastic deformation; the shape of the elastic lip 62 is supported by a supporting spring 64 and a variable lip bracket 65, the supporting spring 64 is in a horn mouth shape, is connected with the duct wall interface 61 and the outlet mounting ring 63, is supported at the inner side of the elastic lip 62, the size of the outlet section, namely the outer end of the horn mouth, can be changed by the traction of the variable lip bracket 65, the outlet mounting ring 63 is composed of a circular spring ring with adjustable diameter and an elastic material, the diameter size can be adjusted under the condition of keeping the circular shape, the outlet mounting ring 63 is connected with the duct shell, the material of the connecting part is also the elastic material, and the shape can be changed along with the change of the diameter size of the outlet; variable lip support 65 accessible is flexible changes support radian and the diameter size that outer end and export collar 63 are connected, and the support is pull by actuating lever 66 and is realized the shape change and fixed, and actuating lever 66 is driven the operation by drive devices such as the servo steering wheel of installation on the drive seat 67 or hydraulic stem.
The diameter change of the ducted outlet is realized through deformation, the variable outlet system is added into the ducted outlet, and other parts are similar to those of the conventional ducted system; the variable lip support 65 is driven by a variable outlet system through a servo steering engine or a hydraulic rod and other driving devices arranged on the driving seat 67 to change the diameter and the outline of the outlet, the supporting spring 64 is matched with the outline of the variable lip support to change the specific supporting outline of the lip, and the elastic lip deforms along with the variable lip to realize the integral diameter and the variable outline of the lip so as to support the adjustment of the wind speed of the outlet of the duct and meet different requirements of vertical take-off and landing and forward flight cruising.
As shown in fig. 4-6, fig. 4 is a state of the variable outlet duct system during cruising flight, in which the duct outlet is smaller and the windward area of the duct is smaller to reduce flight resistance, and the contracted elastic material can provide higher strength to support larger aerodynamic load under the condition of high-speed forward flight; 5-6 are the state of the variable outlet duct system in the vertical take-off and landing, the duct outlet is enlarged to reduce the air flow speed of the duct outlet and improve the environmental friendliness.
Furthermore, the diameter of the outlet of the duct can be changed to 1.2-2 times of the diameter of the original outlet, and the section line of the outlet of the duct and the wall surface of the duct keep continuous pneumatic appearance.
Further, in order to provide higher installation strength, an installation joint capable of being positioned in a sliding mode can be added between the supporting spring 64 and the variable lip support 65 to adapt to installation position change between the support and the supporting spring caused by appearance change of the ducted outlet, the installation joint can be in a cross joint form with through holes, and the like, the support and the spring are arranged in the middle in a longitude and latitude mode and can be locked through locking mechanisms such as locking screws and the like; the suction cup and other structures can be added between the elastic lip 62, the supporting spring 64 and the variable lip support 65, the suction cup is installed on the supporting spring 64 to absorb the elastic lip 62, and the action of loosening or tightening can be remotely controlled or automatically executed.
Furthermore, the ducted outlet can be replaced by the traditional hard material matched with an elastic deformation material, for example, the hard material such as metal, composite material and the like is matched with the elastic deformation material such as rubber and the like, the outlet is driven to deform by the supporting system, and the expanded surface area is covered by the deformation of the elastic material.
According to the variable outlet duct system, the diameter of the outlet of the duct is enlarged, so that the flow velocity of washing air under the duct is reduced, the environmental friendliness of the duct system is improved, and the lifting environmental adaptability of the duct system is improved; meanwhile, the ducted system can be reduced in size when flying forwards, the flying resistance is reduced, and the flying efficiency is improved. The aerodynamic load is large when flying forward, and the contracted elastic elements, the support frames and other structures are more suitable for large-load scene application; the aerodynamic load is smaller when the vertical take-off and landing are carried out, and the stretched elastic material can be adapted.
Claims (8)
1. A variable outlet ducted system, comprising: a duct (1); the duct outlet (6) of the duct (1) comprises: the device comprises a duct wall interface (61), an elastic lip (62), an outlet mounting ring (63), a supporting spring (64), a variable lip bracket (65), a driving rod (66) and a driving seat (67);
the duct wall interface (61), the elastic lip (62) and the outlet mounting ring (63) are all annular and are sequentially connected from top to bottom, the duct wall interface (61) is in transitional connection with the duct wall surface (5) of the duct (1), and the outlet mounting ring (63) is connected with the shell of the duct (1);
the supporting spring (64) is in a horn mouth shape and is supported on the inner side of the elastic lip (62), a plurality of variable lip brackets (65) are arranged along the circumferential direction of the supporting spring (64), and the supporting spring (64) and the plurality of variable lip brackets (65) are used for supporting the appearance of the elastic lip (62);
the variable lip support (65) is connected with a driving seat (67) through a driving rod (66), the driving seat (67) drives the driving rod (66) to drive the variable lip support (65) to move so as to drive the supporting spring (64) to deform, and therefore the diameter and the shape of the elastic lip (62) are changed.
2. The system of claim 1, wherein the outlet mounting ring (63) is constructed of an adjustable diameter round spring ring and a resilient material.
3. The system according to claim 2, characterized in that the connection of the outlet mounting ring (63) to the housing of the duct (1) is made of an elastic material.
4. The system according to claim 1, characterized in that the diameter of the ducted outlet (6) is increased to 1.2-2 times the original outlet diameter.
5. The system according to claim 1, wherein the variable lip stent (65) is elongated and has two ends connected to the duct wall interface (61) and the exit mounting ring (63), respectively.
6. The system of claim 5, wherein the support spring (64) is connected at one end to the duct wall interface (61) and at the other end to the outlet mounting ring (63).
7. The system according to claim 1, characterized in that a mounting joint is provided between the support spring (64) and the variable lip brackets (65) for bringing each variable lip bracket (65) to bend as the size of the flare of the support spring (64) changes when the support spring (64) is deformed.
8. The system of claim 1, further comprising: the rotary wing mounting support (3) is arranged on the rotary wing (2);
the rotor (2) is installed on a duct wall surface (5) of the duct (1) through a rotor installation support (3), and the rotor (2) is driven to rotate through a power output shaft of a motor or an engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111382489.XA CN114180032B (en) | 2021-11-19 | 2021-11-19 | Variable outlet duct system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111382489.XA CN114180032B (en) | 2021-11-19 | 2021-11-19 | Variable outlet duct system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114180032A true CN114180032A (en) | 2022-03-15 |
| CN114180032B CN114180032B (en) | 2023-10-27 |
Family
ID=80541125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111382489.XA Active CN114180032B (en) | 2021-11-19 | 2021-11-19 | Variable outlet duct system |
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| Country | Link |
|---|---|
| CN (1) | CN114180032B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117685098A (en) * | 2024-02-01 | 2024-03-12 | 西安航空学院 | Stepless adjusting device for outer duct of variable-cycle engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973391A (en) * | 2010-10-15 | 2011-02-16 | 北京理工大学 | Lip and spread angle variable efficient duct |
| US20160061144A1 (en) * | 2014-08-26 | 2016-03-03 | The Boeing Company | Variable geometry inlet for a ducted fan and method of assembling same |
| CN105966601A (en) * | 2016-06-14 | 2016-09-28 | 西北工业大学 | Ducted fan lip inflatable air bag and flow separation control method thereof |
| IL248389A0 (en) * | 2015-12-03 | 2016-11-30 | Boeing Co | Variable-geometry ducted fan |
| CN112607002A (en) * | 2020-12-18 | 2021-04-06 | 南京航空航天大学 | Double-rotor ducted aircraft based on annular motor drive and control method thereof |
-
2021
- 2021-11-19 CN CN202111382489.XA patent/CN114180032B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973391A (en) * | 2010-10-15 | 2011-02-16 | 北京理工大学 | Lip and spread angle variable efficient duct |
| US20160061144A1 (en) * | 2014-08-26 | 2016-03-03 | The Boeing Company | Variable geometry inlet for a ducted fan and method of assembling same |
| IL248389A0 (en) * | 2015-12-03 | 2016-11-30 | Boeing Co | Variable-geometry ducted fan |
| US20170159674A1 (en) * | 2015-12-03 | 2017-06-08 | The Boeing Company | Variable-Geometry Ducted Fan |
| CN105966601A (en) * | 2016-06-14 | 2016-09-28 | 西北工业大学 | Ducted fan lip inflatable air bag and flow separation control method thereof |
| CN112607002A (en) * | 2020-12-18 | 2021-04-06 | 南京航空航天大学 | Double-rotor ducted aircraft based on annular motor drive and control method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117685098A (en) * | 2024-02-01 | 2024-03-12 | 西安航空学院 | Stepless adjusting device for outer duct of variable-cycle engine |
| CN117685098B (en) * | 2024-02-01 | 2024-04-05 | 西安航空学院 | Stepless adjusting device for outer duct of variable-cycle engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114180032B (en) | 2023-10-27 |
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