CN107554784B - Cross flow fan and method for randomly adjusting inclination angle of fan wing on cross flow fan - Google Patents
Cross flow fan and method for randomly adjusting inclination angle of fan wing on cross flow fan Download PDFInfo
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- CN107554784B CN107554784B CN201710681403.0A CN201710681403A CN107554784B CN 107554784 B CN107554784 B CN 107554784B CN 201710681403 A CN201710681403 A CN 201710681403A CN 107554784 B CN107554784 B CN 107554784B
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Abstract
The invention discloses a cross flow fan and a method for randomly adjusting the inclination angle of a fan wing on the cross flow fan, thereby completing dynamic control on the aerodynamic performance of a relevant aircraft, wherein the cross flow fan comprises a cross flow fan rotating disc and a plurality of fan blades, a plurality of fan blade rotating shaft holes are arranged on the surface of the cross flow fan rotating disc around the circumference, and the distances from the plurality of fan blade rotating shaft holes to the circle center of the cross flow fan rotating disc are equal; the rotating sleeve is sleeved in the fan blade rotating shaft hole, one end of the rotating sleeve extends to the outer side of the cross flow fan rotating disc and is limited by the limiting base plate, and the other end of the rotating sleeve extends and is fixed on the inner side surface of the cross flow fan rotating disc; the inner wall in the rotating sleeve is provided with a fixing groove for fastening the fan blades, and the plurality of fan blades are respectively vertically arranged in a plurality of rotating shaft holes on the cross flow fan rotating disc through a plurality of rotating sleeves; the lateral wall of the cross flow fan rotary disc is provided with a fan blade locking mechanism, and one fan blade rotary shaft hole corresponds to one fan blade locking mechanism.
Description
Technical Field
The invention belongs to the field of low-speed high-load aviation aircrafts with short-distance take-off and landing or vertical take-off and landing performances, and particularly relates to a method for randomly adjusting the inclination angle of a fan wing on a cross flow fan.
Background
In currently available aerospace vehicles, wing panels are divided into fixed wing vehicles and rotary wing vehicles. Although fixed wing aircraft have the characteristics of large load and long range, because the generation of lift force depends on the relative speed of the aircraft and static air, a certain length of runway is required during takeoff and landing. While the lift of typical rotorcraft, including helicopters and most of the present rotorcraft, arises from the fact that the rotor, rotating at high speed, accelerates air downwards, thus causing the rotor to acquire an upward reaction force. Although rotorcraft have the characteristic of short take-off and landing or vertical take-off and landing, the generation of such lift generally requires powerful power to accelerate the air, and therefore the effect of lift generated per unit of power is rather limited.
In recent years, a lift force is increased by accelerating airflow after a cross flow fan is installed at a leading edge or a trailing edge of a wing, and the lift force is called a fanning aircraft for short. The respective limitations of both fixed-wing aircraft and rotary-wing aircraft are broken through to some extent. By adopting the technology, due to the acceleration effect of the cross flow fan on air and the eccentric low-pressure vortex in the cross flow fan, on one hand, the fixed-wing aircraft can have higher speed on the air flow on the suction surface of the wing compared with the air flow without the cross flow fan, and on the other hand, the low-pressure eccentric vortex generated by the rotation power can generate higher lift force, so that the efficiency of the lift force generated by the lift force system and the relative consumed power is higher than the corresponding parameter characteristics of the two types of traditional aircraft to a great extent.
As shown in fig. 1, generally, because the blades of the cross flow fan of the aircraft are fixedly arranged on the turntable of the cross flow fan, when the cross flow fan is started, the blades thereon can only rotate at a preset fixed inclination angle, and cannot be adjusted in real time according to actual needs. In the process of processing and producing the cross flow fan, the fan blades with different inclination angles are required to be processed to meet different use requirements, and the processing work is complicated.
Disclosure of Invention
The invention aims to provide a cross flow fan and a method for randomly adjusting the inclination angle of a fan wing on the cross flow fan so as to complete dynamic control on the aerodynamic performance of a relevant aircraft.
In order to achieve the purpose, the specific technical scheme of the invention is as follows:
a cross flow fan comprising: the cross flow fan comprises a cross flow fan rotating disc and a plurality of fan blades, wherein a plurality of fan blade rotating shaft holes are formed in the surface of the cross flow fan rotating disc around the circumference, and the distances between the fan blade rotating shaft holes and the circle center of the cross flow fan rotating disc are equal;
the rotating sleeves are sleeved in the fan blade rotating shaft holes, one end of each rotating sleeve extends to the outer side of the cross flow fan rotating disc and is limited by a limiting chassis, and the other end of each rotating sleeve extends and is fixed on the inner side surface of the cross flow fan rotating disc;
the inner wall of the rotating sleeve is provided with a fixing groove for fastening the fan blades, and the plurality of fan blades are vertically arranged in the plurality of rotating shaft holes on the cross flow fan turntable through the plurality of rotating sleeves respectively;
the lateral wall of the cross flow fan rotary table is provided with a fan blade locking mechanism, and one of the fan blade rotary shaft holes corresponds to one of the fan blade locking mechanisms.
Furthermore, each fan blade rotating shaft hole is provided with a rotating scale.
Furthermore, one end of the rotating sleeve, which is positioned on the inner side surface of the cross flow fan rotating disc, is provided with a fan blade driven gear disc which is integrally formed with the rotating sleeve;
the cross flow fan rotary table is provided with a synchronous adjusting gear disc which is concentric and coaxial with the cross flow fan rotary table and is meshed with a plurality of fan blade driven gear discs around the synchronous adjusting gear disc.
Further, still include electrical system, synchronous adjustment toothed disc with electrical system is connected.
Furthermore, a rotating tooth is arranged on one side, close to the synchronous adjusting gear disc, of the fan blade driven gear disc, and the rotating angle range of the rotating tooth is the rotating angle range of the fan blades, and is-45 degrees to 45 degrees.
The invention also provides a method for randomly adjusting the inclination angle of the fan wing on the cross flow fan, which comprises the following steps:
a. manually or automatically adjusting the rotating sleeve where the target fan blade is located according to real-time requirements;
b. and after the target fan blade rotates to the target angle position, the angle position of the rotating sleeve in the fan blade rotating shaft hole is locked through the fan blade locking mechanism.
Further, in step a, the target fan blade is manually adjusted, and one or more fan blades are adjusted each time.
Further, in the step a, when the fan blades are automatically adjusted, the electric control system is started, the electric control system drives the synchronous adjusting gear disc to drive the plurality of fan blade driven gear discs to rotate for a set angle at the same time, and then the synchronous adjusting gear disc is fixed.
Numerical simulations and experimental results have demonstrated that: in all the wing aircraft, since the cross flow fan has an accelerating effect on the incoming flow, and the magnitude of the accelerating effect is usually in great relation to the magnitude of the radial inclination angle of the fan blades of the cross flow fan, it can be said that the lift force of the aircraft can be adjusted to a great extent by changing the magnitude of the inclination angle of the fan blades, and the inclination angle of the common fan blades is fixed in advance.
The invention is characterized in that: provides a structure which utilizes the structure that the fan blades are arranged on a rotating shaft to complete the continuous adjustment or setting of the inclination angle of the fan blades. The structure in the form can complete independent setting and adjustment of the inclination angle of each fan blade; on the other hand, under the help of a set of auxiliary gear mechanisms, the synchronous adjustment of the inclination angles of all the fan blades can be completed; in addition, the synchronous adjustment of the inclination angle under the running state of the cross flow fan can be completed at any time by matching with the related electric mechanism, so that the control and the adjustment of the lift force on different operation degrees are realized.
Drawings
FIG. 1 is a schematic diagram of a cross flow fan of an aircraft commonly used today;
FIG. 2 is a schematic structural diagram of a cross flow fan provided in the present invention;
FIG. 3 is a graph illustrating the results of an experiment for adjusting the angle of a fan blade using a cross flow fan according to the present invention;
1. the fan comprises a cross flow fan rotating disc, 2 fan blades, 3 fan blade rotating shaft holes, 4 fan blade driven gear discs, 5 fan blade locking mechanisms, 6 synchronous adjusting gear discs and 7 cross flow fan rotating shaft holes.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings.
A cross flow fan, as shown in fig. 2, comprising: the fan comprises a cross flow fan rotating disc 1 and a plurality of fan blades 2, wherein a plurality of fan blade rotating shaft holes 3 are formed in the surface of the cross flow fan rotating disc 1 around the circumference, and the distances from the fan blade rotating shaft holes 3 to the circle center of the cross flow fan rotating disc 1 are equal;
it is a plurality of all be equipped with rotatory sleeve in the fan blade rotation axis hole 3, rotatory telescopic length is greater than the thickness of crossing current fan carousel 1, rotatory sleeve cover is established in the fan blade rotation axis hole 3, its one end extends to crossing current fan carousel 1's the outside and spacing through spacing chassis, its other end extends to fix crossing current fan carousel 1's inboard surface.
A fixing groove for fastening the fan blades 2 is formed in the inner wall of the rotating sleeve, and the plurality of fan blades 2 are vertically arranged in the plurality of rotating shaft holes in the cross flow fan rotating disc 1 through the plurality of rotating sleeves respectively; in order to adjust the set angle, preferably, each fan blade rotating shaft hole 3 is provided with a rotating scale.
The lateral wall of the cross flow fan rotating disc 1 is provided with a fan blade locking mechanism 6, and one fan blade rotating shaft hole 3 corresponds to one fan blade locking mechanism 6. The fan blade locking mechanism 6 may be a jack screw or any other component capable of locking and fastening.
The angle of each fan blade 2 can be adjusted manually, or the angle of one fan blade 2 can be adjusted at a time. When the aircraft flies at a high speed, or all the fan blades 2 need to be adjusted in angle at the same time, the aircraft can be driven by the motor. Preferably, the one end of rotatory sleeve is equipped with integrated into one piece's flabellum driven gear dish 4, is equipped with synchronous adjustment gear dish 6 on the crossing current fan carousel 1, synchronous adjustment gear dish 6 with crossing current fan carousel 1 is concentric coaxial, and rather than a plurality of on every side the mutual meshing of flabellum driven gear dish 4. The circle center of the cross flow fan rotating disc 1 is the cross flow fan rotating shaft hole 7 which is the same as the fan blade driven gear disc 4.
The synchronous adjusting gear disc 6 is connected with the electric control system. And starting an electric control system to drive the synchronous adjusting gear disc 6, and driving the fan blade driven gear disc 4 to rotate each fan blade 2 to a preset angle.
Because the rotation angle of the fan blades 2 is limited, preferably, rotating teeth are arranged on one side, close to the synchronous adjusting gear disc 6, of the fan blade driven gear disc 4, and the rotation angle range of the rotating teeth is the rotation angle range of the fan blades, and is-45 degrees to 45 degrees.
The invention also provides a method for randomly adjusting the inclination angle of the fan wing on the cross flow fan, which comprises the following steps:
a. manually or automatically adjusting the rotating sleeve where the target fan blade 2 is located according to real-time requirements; the target blade 2 is adjusted manually, one or more of the blades 2 being adjusted at a time.
Automatically regulated during flabellum 2, start electrical system, electrical system drive synchronous adjustment toothed disc 6 drives a plurality of flabellum driven toothed disc 4 rotates simultaneously and sets for the angle, later fixes synchronous adjustment toothed disc 6.
b. After the target fan blade 2 rotates to the target angle position, the angle position of the rotating sleeve in the fan blade rotating shaft hole 3 is locked through the fan blade locking mechanism 6.
As shown in fig. 3, the abscissa represents the rotational speed of the cross flow fan, and the ordinate represents the lift force. In the experiment, the lifting force can be obtained by adjusting the rotating speed of the transverse flow fan. Here, the rotational speed of the cross flow fan starts from 8Hz (800 rpm), and the rotational speed increases by 100 rpm every 1Hz increase. The forward tilt angles of the cross flow fan blades are 20 degrees, 10 degrees, 15 degrees and 12.5 degrees, respectively.
According to the cross flow fan and the method for randomly adjusting the inclination angle of the fan wing on the cross flow fan, in the experimental test of the fan wing aircraft, even if the inclination angles of the blades are manually set one by one, the complex work that the cross flow fan with different inclination angles needs to be processed in actual operation is avoided. For an actual aircraft, aerodynamic performance parameters under the condition of continuously changing inclination angles can be obtained, and therefore the oscillation region of the corresponding lift force in the non-steady state can be accurately determined, and the method provides help for research and application of the aircraft.
Under the condition of configuring all blade inclination angle synchronous regulation tooth-shaped mechanisms, synchronous and unified regulation of the inclination angles of the cross flow fan can be realized, and further continuous regulation of the lift force is realized.
If the tooth-shaped mechanism for synchronously adjusting the inclination angles of all the blades is matched with the electric control system, the inclination angles of the blades can be adjusted and set at any time in the high-speed running process of the cross flow fan, and further the lift force of the relevant aircraft can be controlled in real time, so that a means can be provided for the real-time control and adjustment of the pneumatic parameters of the aircraft.
Although the embodiments of the present invention have been described above, the embodiments are only given as examples and are not intended to limit the scope of the present invention. These new embodiments can be implemented in other various ways, and various omissions, substitutions, and changes can be made without departing from the spirit of the present invention. These embodiments and modifications thereof are included in the scope and gist of the present invention, and are also included in the invention described in the claims and the equivalent scope thereof.
Claims (7)
1. A cross flow fan, comprising: the cross flow fan comprises a cross flow fan rotating disc and a plurality of fan blades, wherein a plurality of fan blade rotating shaft holes are formed in the surface of the cross flow fan rotating disc around the circumference, and the distances between the fan blade rotating shaft holes and the circle center of the cross flow fan rotating disc are equal;
a plurality of fan blade rotating shaft holes are internally provided with rotating sleeves, the length of each rotating sleeve is greater than the thickness of the cross flow fan rotating disc, each rotating sleeve is sleeved in the corresponding fan blade rotating shaft hole, one end of each rotating sleeve extends to the outer side of the cross flow fan rotating disc and is limited by a limiting base plate, the other end of each rotating sleeve extends and is fixed on the inner side surface of the cross flow fan rotating disc, each rotating sleeve is positioned at one end of the inner side surface of the cross flow fan rotating disc, a fan blade driven gear disc is integrally formed with the corresponding rotating sleeve, a synchronous adjusting gear disc is arranged on the cross flow fan rotating disc, the synchronous adjusting gear disc and the cross flow fan rotating disc are concentric and coaxial, and are meshed with a plurality of fan blade driven;
the inner wall of the rotating sleeve is provided with a fixing groove for fastening the fan blades, and the plurality of fan blades are vertically arranged in the plurality of rotating shaft holes on the cross flow fan turntable through the plurality of rotating sleeves respectively;
the lateral wall of the cross flow fan rotary table is provided with a fan blade locking mechanism, and one of the fan blade rotary shaft holes corresponds to one of the fan blade locking mechanisms.
2. A cross flow fan as claimed in claim 1 wherein each of the fan blade rotation axis holes is provided with a rotation scale.
3. A cross flow fan as claimed in claim 2 further comprising an electronic control system, the synchrotilt gear disc being connected to the electronic control system.
4. A cross flow fan as claimed in claim 3 wherein the fan blade driven gear plate is provided with a rotary gear on a side thereof adjacent to the synchronous adjustment gear plate, the rotary gear having a rotation angle in the range of-45 ° to 45 ° of the rotation angle of the fan blade.
5. Method for ad libitum adjustment of the fan wing inclination angle on a cross flow fan as claimed in claim 4, characterized by comprising the steps of:
a. manually or automatically adjusting a rotating sleeve where the target fan blade is located according to real-time requirements;
b. and after the target fan blade rotates to the target angle position, locking the angle position of the rotating sleeve in the fan blade rotating shaft hole through a fan blade locking mechanism.
6. The method of claim 5, wherein in step a, the target fan blade is manually adjusted, one or more fan blades being adjusted at a time.
7. The method for adjusting the inclination angle of fan wing according to claim 5, wherein in step a, when the fan blades are automatically adjusted, the electric control system is started, and drives the synchronous adjusting gear disc to drive the plurality of fan blade driven gear discs to rotate for a set angle at the same time, and then fixes the synchronous adjusting gear disc.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710681403.0A CN107554784B (en) | 2017-08-10 | 2017-08-10 | Cross flow fan and method for randomly adjusting inclination angle of fan wing on cross flow fan |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710681403.0A CN107554784B (en) | 2017-08-10 | 2017-08-10 | Cross flow fan and method for randomly adjusting inclination angle of fan wing on cross flow fan |
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| Publication Number | Publication Date |
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| CN107554784A CN107554784A (en) | 2018-01-09 |
| CN107554784B true CN107554784B (en) | 2020-03-17 |
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| CN114313259A (en) * | 2021-12-30 | 2022-04-12 | 中国人民解放军总参谋部第六十研究所 | Longitudinal rolling wing unit and longitudinal rolling wing aircraft based on same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4194707A (en) * | 1977-12-16 | 1980-03-25 | Sharpe Thomas H | Lift augmenting device for aircraft |
| DE4217374A1 (en) * | 1992-05-26 | 1993-12-02 | Eberhard Bach | STOL aircraft with twin fuselage achieving air-cushion effect - has pivotable engine mountings affording choice of conventional flight or utilisation of ground effect for lift |
| CN103587702A (en) * | 2012-08-14 | 2014-02-19 | 林彦良 | Cross flow fan flying device |
| CN204750567U (en) * | 2015-05-07 | 2015-11-11 | 南京航空航天大学 | High -speed fan wing aircraft |
| CN204726671U (en) * | 2015-05-07 | 2015-10-28 | 南京航空航天大学 | A kind of high efficient fan wing |
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Effective date of registration: 20220921 Address after: 101400 room 208, second floor, building 13, yard 53, Yanqi street, Yanqi Economic Development Zone, Huairou District, Beijing (cluster registration) Patentee after: Beijing Kelisen Technology Co.,Ltd. Address before: 100190, No. 15 West Fourth Ring Road, Beijing, Haidian District Patentee before: INSTITUTE OF MECHANICS, CHINESE ACADEMY OF SCIENCES |