CN109850129A - Denoising structure and its aircraft and its control method for undercarriage and cabin - Google Patents
Denoising structure and its aircraft and its control method for undercarriage and cabin Download PDFInfo
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- CN109850129A CN109850129A CN201910311569.2A CN201910311569A CN109850129A CN 109850129 A CN109850129 A CN 109850129A CN 201910311569 A CN201910311569 A CN 201910311569A CN 109850129 A CN109850129 A CN 109850129A
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Abstract
The invention discloses a kind of denoising structures and its aircraft and its control method for undercarriage and cabin, belong to undercarriage and undercarriage cabin noise reduction measure technical field.A kind of denoising structure for undercarriage and cabin of the invention, including interference in air flow part, extensible member, mounting base；Wherein, the side of interference in air flow part and extensible member are hinged；The other side of interference in air flow part and mounting base be hinged or the top of interference in air flow part and mounting base it is hinged；It is swung by the flexible certain driving air-flow disruption member of extensible member around mounting base, puts/receipts movement with realize interference in air flow part.Using a kind of denoising structure for undercarriage and cabin of the invention, the present invention interferes incoming flow by interference in air flow part, change the state of air-flow, to reduce air-flow to the effect of impact of undercarriage, cabin, change the interaction of incoming flow and cabin bottom of chamber air-flow, the formation of noise mechanism is destroyed, and then realizes the purpose of noise reduction.
Description
Technical field
The present invention relates to a kind of denoising structure for aircraft, especially a kind of noise reduction for undercarriage and cabin
Structure and its aircraft and its control method belong to undercarriage and undercarriage cabin noise reduction measure technical field.
Background technique
Aircraft noise is mainly derived from several parts such as dynamical system, airframe systems, high lift device, Landing Gear System, because
Undercarriage contour structures are complicated, and the air-flow and undercarriage of high-speed motion interact, and generate intense impact to undercarriage cabin,
Cause cabin (undercarriage cabin is referred to as cabin) and its inner satellite object to generate sharp pounding, generates structural fatigue, jeopardize winged
Machine flight safety.Meanwhile because of the violent noise also different ignorance that air-flow generates, there is data to suggest that, in engine cut-off and wing flap
In the case where not being unfolded, Landing gear noise accounts for the 25% of entire noise, and the noise is to airframe intensity, occupant comfort, airport
Surrounding enviroment have bigger influence.
International Civil Aviation Organization (ICAO) attachment 16(environmental protection, I & of Environmental Protection Volumes
II) european union airworthiness standard (EUJAR) the 36th, U.S. Federal Aviation Regulation (FAR) the 36th, China Civil Aviation Regulations
(CCAR) tissues such as the 36th (aircraft type designator and seaworthiness certification noise criterias) have formulated a series of air worthiness regulations one after another
Aircraft noise is limited, an important composition that undercarriage and its cabin coupled noise are constituted as entire aircraft noise
Whether part, noise reduction measure effectively necessarily become the whether successful key factor of entire aircraft system noise reduction.
For undercarriage and its cabin part, most of research both at home and abroad is mainly by adding noise reduction measure to undercarriage
(such as air curtain) changes air flow condition, and then reduces the interaction of vortex shedding and aircraft components, and then realizes the mesh of noise reduction
, but due to undercarriage and its cabin coupling after, cabin generate noise often in low frequency, intermediate frequency phase, energy attenuation is small, energy
Grade is enough to cause to generate injury to the personnel on airport periphery, although human body has the function of self-regeneration, repairs speed and far catches up with
Speed is injured on, is chronically in such noise, is easy that people is allowed to experience auditory fatigue, causes hearing impairment, it is serious to incite somebody to action
It will lead to hearing organ and generate organic disease, finally thoroughly lose Listening Ability of Ethnic.
In conclusion being directed to entire undercarriage and its cabin coupled system at present, effective measures there is no to drop noise
Make an uproar, but environmental standard, occupant comfort etc. are increasingly stringenter noise requirements, as how to control the higher undercarriage of accounting and
Its cabin noise problem needs urgently to be resolved.
Summary of the invention
Goal of the invention of the invention is: in view of the above problems, providing a kind of for undercarriage and cabin
Denoising structure and its aircraft and its control method, the present invention can be effectively reduced air-flow to the effect of impact of undercarriage, cabin,
Realize the purpose of noise reduction.
The technical solution adopted by the invention is as follows:
A kind of denoising structure for undercarriage and cabin, including interference in air flow part, extensible member, mounting base；Wherein, air-flow
The side of disruption member and extensible member are hinged；The other side of interference in air flow part and mounting base be hinged or the top of interference in air flow part
It is hinged with mounting base；Swung by the flexible certain driving air-flow disruption member of extensible member around mounting base, with realize the putting of interference in air flow part/
Receipts movement.
The principle of denoising structure of the invention is: by interference in air flow part to incoming flow (air-flow for hitting undercarriage and cabin)
It is interfered, changes the state of air-flow, (cabin is referred to for accommodating undercarriage to undercarriage, cabin to reduce air-flow
Cabin cavity) effect of impact, change incoming flow and cabin bottom of chamber air-flow interaction, destruction the formation of noise mechanism, Jin Ershi
The purpose of existing noise reduction.In the aircraft course of work, undercarriage, which is needed, to be put down/packs up, in the aircraft landing stage, undercarriage
It need to put down；The stage is risen in aircraft, undercarriage need to be packed up.It is also to need to put down/pack up as interference in air flow part, has benefited from this
The design of the denoising structure of invention, in use, mounting base, extensible member are individually fixed in cabin, (hatch door has referred to hatch door
Fall the hatch door of frame cabin) open after, by extensible member it is flexible can certain driving air-flow disruption member swing around mounting base, to realize
Interference in air flow part puts/receipts movement.In the aircraft landing stage, interference in air flow part can also play the role of deceleration, can increase gas
Flow resistance power shortens runway distance.
Alternative, the extensible member is articulated with the medium position of interference in air flow part side, and mounting base is articulated with air-flow
The top position of the disruption member other side.It is most reasonable to be laid out, by extensible member it is flexible can certain driving air-flow disruption member around mounting base
The purpose of swing.
Alternative, the bottom of the interference in air flow part is the broached-tooth design being made of multiple sawtooth.Structure is simple, holds
Easily manufacture, it is easy to accomplish, broached-tooth design can effectively change the state of air-flow, to reduce air-flow to undercarriage, cabin
Effect of impact changes the interaction of incoming flow and cabin bottom of chamber air-flow, destroys the formation of noise mechanism, and then realize the mesh of noise reduction
's.Broached-tooth design can implement interference effect to aircraft incoming flow, and air-flow is separated into several in the big whirlpool that cabin bottom of chamber is formed
The Forming Mechanism in big whirlpool is destroyed in small whirlpool, reduces air-flow to the effect of impact of undercarriage, cabin, realizes the purpose of noise reduction.
Alternative, the interference in air flow part includes connecting plate and sawtooth group, and sawtooth is mounted on connecting plate bottom；Its
In, the side of connecting plate and extensible member are hinged；The other side of connecting plate and mounting base be hinged or top and the installation of connecting plate
Seat is hinged.Air-flow is separated into several small whirlpools in the big whirlpool that cabin bottom of chamber is formed by sawtooth group, is destroyed the Forming Mechanism in big whirlpool, is subtracted
Little airflow realizes the purpose of noise reduction to the effect of impact of undercarriage, cabin.
Further, the sawtooth group is tilted to that side for being hinged with extensible member, and sawtooth group and connecting plate form angle
α。
It is alternative, in the hinged place of interference in air flow part and mounting base, it is equipped with and is swung for detecting interference in air flow part
The detecting element of angle.It is able to detect the swing angle of interference in air flow part, in order to carry out being precisely controlled the pendulum of interference in air flow part
The purpose of dynamic angle is easy to intelligent and realizes so that interference in air flow part swings to specified position.
Further, the detecting element is angular encoder.It can be realized the swing angle of detection interference in air flow part
Purpose.
A kind of aircraft, including above-mentioned denoising structure.Using the aircraft of denoising structure of the invention, denoising structure can be effective
Air-flow is reduced to the effect of impact of undercarriage, cabin, realizes the purpose of noise reduction.
A kind of control method for putting/receiving interference in air flow part and undercarriage: using above-mentioned aircraft, and the control method includes putting
Downstream disruption member and undercarriage step, and pack up undercarriage and interference in air flow part step；Wherein,
In putting down interference in air flow part and undercarriage step, include the following steps:
F1, undercarriage door is started to open, puts down the interference in air flow part 1 of denoising structure；
F2, interference in air flow part 1 swing to downwards designated position；
F3, drop；
In packing up undercarriage and interference in air flow part step, include the following steps:
S1, undercarriage is packed up；
S2, the interference in air flow part 1 for packing up denoising structure, begin to shut off undercarriage door；
S3, interference in air flow part 1 swing upwards into designated position.
By above-mentioned control method, gas can be reduced in aircraft in aircraft landing stage and aircraft rise stage
The effect of impact to undercarriage, cabin is flowed, realizes the purpose of noise reduction.
Further, in step F2, when interference in air flow part 1 swings to downwards designated position, the saw of 1 bottom of interference in air flow part
Tooth and airflow direction form angle β, and angle β is 30 ° -60 °.Noise reduction effect is best.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1, a kind of denoising structure for undercarriage and cabin of the invention, structure is simple, easy to manufacture, it is easy to accomplish,
It is practical, be conducive to promote and apply；The present invention interferes incoming flow by interference in air flow part, changes the state of air-flow, from
And air-flow is reduced to the effect of impact of undercarriage, cabin, change the interaction of incoming flow and cabin bottom of chamber air-flow, destroys noise shape
At mechanism, and then realize the purpose of noise reduction.In the aircraft landing stage, interference in air flow part can also play the role of deceleration, Neng Gouzeng
Add gas-flow resistance, shortens runway distance.Relative to current aircraft undercarriage and the uncontrolled status of cabin, the present invention is solved
The problem of " whether there is or not " is a ground-breaking innovation and creation.
2, the bottom of interference in air flow part is the broached-tooth design being made of multiple sawtooth；Alternatively, interference in air flow part includes connection
The design of plate and sawtooth group, structure is simple, easy to manufacture, it is easy to accomplish.Broached-tooth design/sawtooth group can be implemented aircraft incoming flow
Air-flow is separated into several small whirlpools in the big whirlpool of formation by interference effect, destroys the Forming Mechanism in big whirlpool, reduces air-flow to rising and falling
The effect of impact of frame, cabin realizes the purpose of noise reduction.
3, the design of detecting element is able to detect the swing angle of interference in air flow part, in order to carry out being precisely controlled air-flow
The purpose of the swing angle of disruption member is easy to intelligent and realizes so that interference in air flow part swings to specified position.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is the structural schematic diagram at the first visual angle of denoising structure；
Fig. 2 is the structural schematic diagram at second of visual angle of denoising structure；
Fig. 3 is enlarged drawing at A in Fig. 2；
Fig. 4 is the front view of denoising structure；
Fig. 5 is the left view of Fig. 4；
Fig. 6 is the left view of Fig. 5;
Fig. 7 is the structural schematic diagram using the first visual angle of the aircraft of denoising structure；
Fig. 8 is enlarged drawing at B in Fig. 7；
Fig. 9 is the structural schematic diagram using second of visual angle of the aircraft of denoising structure；
Figure 10 is enlarged drawing at C in Fig. 9；
Figure 11 is the schematic diagram of the sawtooth of interference in air flow part bottom and the angle β of incoming flow (air-flow) direction formation；
Figure 12 is the control principle flow chart for putting down interference in air flow part Yu undercarriage step；
Figure 13 is the control principle flow chart for packing up undercarriage Yu interference in air flow part step；
Figure 14 be air velocity be 68m/s when, do not use denoising structure of the invention, and use denoising structure of the invention
(wherein β is 0 °, 30 °, 60 °, 90 °), undercarriage/cabin cavity crosses top noise Direction Curve figure；
Figure 15 be air velocity be 85m/s when, do not use denoising structure of the invention, and use denoising structure of the invention
(wherein β is 0 °, 30 °, 60 °, 90 °), undercarriage/cabin cavity crosses top noise Direction Curve figure；
Figure 16 is noise reduction effect curve graph, and wherein ordinate indicates that noise SPL/dB, abscissa indicate noise frequency f/Hz, air-flow
Speed is 68m/s, and β is 30 °, and "-- basic status " indicates not use denoising structure of the invention, and " - noise reduction process " indicates
Using denoising structure of the invention；
Figure 17 is noise reduction effect curve graph, and wherein ordinate indicates that noise SPL/dB, abscissa indicate noise frequency f/Hz, air-flow
Speed is 85m/s, and β is 30 °, and "-- basic status " indicates not use denoising structure of the invention, and " - noise reduction process " indicates
Using denoising structure of the invention.
Marked in the figure: 1- interference in air flow part, 11- connecting plate, 12- sawtooth group, 2- extensible member, 3- mounting base, 4- detection member
Part.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification unless specifically stated can be equivalent or with similar purpose by other
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.
Embodiment one
As shown in Figures 1 to 6, a kind of denoising structure for undercarriage and cabin of embodiment one, including interference in air flow
Part 1, extensible member 2, mounting base 3；Wherein, the side of interference in air flow part 1 and extensible member 2 are hinged；The other side of interference in air flow part 1 with
Mounting base 3 is hinged；It is swung by the flexible certain driving air-flow disruption member 1 of extensible member 2 around mounting base 3, to realize interference in air flow part 1
Put/receipts movement.
The principle of denoising structure of the invention is: (hitting the gas of undercarriage and cabin to incoming flow by interference in air flow part 1
Stream) it is interfered, change the state of air-flow, (cabin is referred to for accommodating undercarriage to undercarriage, cabin to reduce air-flow
Cabin cavity) effect of impact, change incoming flow and cabin bottom of chamber air-flow interaction, destruction the formation of noise mechanism, in turn
Realize the purpose of noise reduction.In the aircraft course of work, undercarriage, which is needed, to be put down/packs up, and in the aircraft landing stage, is risen and fallen
Frame need to be put down；The stage is risen in aircraft, undercarriage need to be packed up.Therefore, interference in air flow part 1 is also to need to put down/pack up, and is benefited
In the design of denoising structure of the invention, in use, mounting base 3, extensible member 2 are individually fixed in cabin, (hatch door refers to hatch door
Be undercarriage cabin hatch door) open after, by extensible member 2 it is flexible can certain driving air-flow disruption member 1 put around mounting base 3
It is dynamic, so that realizes interference in air flow part 1 puts/receipts movement.In the aircraft landing stage, interference in air flow part 1 can also play the work of deceleration
With can increase gas-flow resistance, shorten runway distance.Preferably, extensible member 2 be hydraulic telescopic rod, hydraulic telescopic rod one end with
Interference in air flow part 1 is hinged, the other end is used to be connected to cabin side wall.Certainly, extensible member 2 can also be electric telescopic rod.
Alternative, as shown in Figures 1 to 6, the extensible member 2 is articulated with the medium position of 1 side of interference in air flow part,
Mounting base 3 is articulated with the top position of 1 other side of interference in air flow part.It is most reasonable to be laid out, and flexible by extensible member 2 can drive
The purpose that interference in air flow part 1 is swung around mounting base 3.
Alternative, the extensible member 2 has 2, mounting base 3 at least 2.In one embodiment, as Fig. 1,
Shown in Fig. 2, Fig. 4, extensible member 2 has 2, and mounting base 3 has 3；Wherein, extensible member 2 is articulated with 1 one middle side part of interference in air flow part
Both ends, two of them mounting base 3 are located at the both ends at the top of 1 other side of interference in air flow part, another is located in two mounting bases 3
Between.Certain extensible member 2 can also only have 1 or more.Mounting base 3 can also only have 1 or more.With following detection members
When the design of part 4 combines, it can be each mounting base 3 and the hinged place of interference in air flow part 1 be equipped with detecting element 4；?
It can be the only wherein hinged place of 1 mounting base 3 and interference in air flow part 1 assembly detecting element 4.
Alternative, as shown in Figure 1, Figure 2, Figure 6 shows, shown, the bottom of the interference in air flow part 1 is by multiple sawtooth groups
At broached-tooth design.Structure is simple, easy to manufacture, it is easy to accomplish, broached-tooth design can effectively change the state of air-flow, thus
Air-flow is reduced to the effect of impact of undercarriage, cabin, changes the interaction of incoming flow and cabin bottom of chamber air-flow, destroys the formation of noise
Mechanism, and then realize the purpose of noise reduction.Broached-tooth design can implement interference effect to aircraft incoming flow, by air-flow in cabin bottom of chamber shape
At big whirlpool be separated into several small whirlpools, destroy the Forming Mechanism in big whirlpool, reduce air-flow to the effect of impact of undercarriage, cabin,
Realize the purpose of noise reduction.
It is alternative, as shown in Figure 1, Figure 2, Figure 6 shows, the interference in air flow part 1 includes connecting plate 11 and sawtooth group 12,
Sawtooth group 12 is set to 11 bottom of connecting plate；Wherein, the side of connecting plate 11 and extensible member 2 are hinged；The other side of connecting plate 11 with
Mounting base 3 is hinged.Air-flow is separated into several small whirlpools in the big whirlpool that cabin bottom of chamber is formed by sawtooth group 12, destroys the formation in big whirlpool
Mechanism reduces air-flow to the effect of impact of undercarriage, cabin, realizes the purpose of noise reduction.It can be, interference in air flow part 1 is by even
What fishplate bar 11 and sawtooth group 12 were made into integration；It is also possible that multiple sawtooth (sawtooth group 12) are continuously welded on 11 bottom of connecting plate
Portion forms interference in air flow part 1.
Preferably, for the sawtooth of broached-tooth design, in other words, for the sawtooth in sawtooth group 12, sawtooth
In isosceles triangular structure, the tall and big bottom edge length in sawtooth of sawtooth, such as sawtooth a height of sawtooth bottom edge length 3
Times.
Further, as shown in figure 5, the sawtooth group 12 to be hinged with extensible member 2 that side tilt, sawtooth group 12 with
Connecting plate 11 forms angle α.Preferably, angle α is 120 ° -150 °.Can certainly be α be 90 ° -180 °.Certainly, may be used also
It is tilted with being sawtooth group 12 to that side for being hinged with mounting base 3.
It is alternative, as shown in Figure 2 and Figure 3, in the hinged place of interference in air flow part 1 and mounting base 3, it is equipped with for examining
Survey the detecting element 4 of 1 swing angle of interference in air flow part.It is able to detect the swing angle of interference in air flow part 1, in order to carry out precisely
The purpose for controlling the swing angle of interference in air flow part 1 is easy to intelligent and realizes so that interference in air flow part 1 swings to specified position.
Further, the detecting element 4 is angular encoder.It can be realized the swing angle of detection interference in air flow part
Purpose.Connecting plate 11 is hinged with mounting base 3, as shown in figure 3, articulated connection relationship is quotidian connection relationship, this
Invention should repeat no more, but also be briefly described here.The structure specifically, mounting base 3 is in U-shape, connecting plate 11 are set
Have for the connection sheet hinged with mounting base 3, connection sheet two sides are set there are two shaft, the rotation of two shafts in the two of mounting base 3
Side is connected, and angular encoder is connected with shaft, to detect the swing angle of interference in air flow part 1.Interference in air flow part 1 with stretch
The articulated connection principle of contracting part 2 is identical with this, and details are not described herein again.
Embodiment two
Embodiment two is basically the same as the first embodiment, the difference is that, the articulated position of mounting base 3 and interference in air flow part 1 is not
Together.In example 1, the other side of interference in air flow part 1 and mounting base 3 are hinged；And in embodiment two, the top of interference in air flow part 1
Portion and mounting base 3 are hinged, and the technical solution of embodiment one, two can realize the mesh that interference in air flow part 1 is swung around mounting base 3
's.It is specific as described below.
A kind of denoising structure for undercarriage and cabin of embodiment two, including interference in air flow part 1, extensible member 2,
Mounting base 3；Wherein, the side of interference in air flow part 1 and extensible member 2 are hinged；The top of interference in air flow part 1 and mounting base 3 are hinged；It is logical
It crosses the flexible certain driving air-flow disruption member 1 of extensible member 2 to swing around mounting base 3, puts/receipts movement with realize interference in air flow part 1.
Interference in air flow part 1 includes connecting plate 11 and sawtooth group 12, and sawtooth group 12 is set to 11 bottom of connecting plate；Wherein, it connects
The side of plate 11 and extensible member 2 are hinged；The top of connecting plate 11 and mounting base 3 are hinged.
With the technical solution of embodiment two, the technical solution of embodiment one, which is easily facilitated, is fixed to cabin for mounting base 3
Antetheca.
Embodiment three
In design basis based on embodiment one or two, embodiment three includes the aircraft of the denoising structure of embodiment one or two.
As shown in Figure 1 to 11, a kind of aircraft of embodiment three, the denoising structure including embodiment one or two.Noise reduction knot
Structure can be effectively reduced air-flow to the effect of impact of undercarriage, cabin, realize the purpose of noise reduction.Specifically, 2 extensible members 2 are logical
The two sidewalls that cabin is welded and fixed in attachment base are crossed, the antetheca of cabin is welded and fixed in 3 mounting bases 3；Interference in air flow part 1 is located at
The front of undercarriage, interference in air flow part 1 interfere incoming flow, realize the purpose of noise reduction.
Specifically, extensible member 2, detecting element 4 are electrically connected with the operation bench of aircraft handling room.It is flexible by operation bench control
Part 2 stretches, and the swing angle signal of interference in air flow part 1 is passed to operation bench by detecting element 4, so as to intelligentized reality
Interference in air flow part 1 is now made to swing to specified position.
Example IV
In design basis based on embodiment three, example IV discloses a kind of control for putting/receiving interference in air flow part and undercarriage
Method.As described below.
As shown in Figure 12 to Figure 13, a kind of control method for putting/receiving interference in air flow part and undercarriage of example IV: use
The aircraft of embodiment three, the control method include putting down interference in air flow part and undercarriage step, and pack up undercarriage and gas
Flow disruption member step；Wherein,
In putting down interference in air flow part and undercarriage step, include the following steps:
F1, undercarriage door is started to open, puts down the interference in air flow part 1 of denoising structure；
F2, interference in air flow part 1 swing to downwards designated position and (are extended by extensible member 2, Lai Shixian interference in air flow part 1 is to the bottom
Move the purpose to designated position)；
F3, drop；
In packing up undercarriage and interference in air flow part step, include the following steps:
S1, undercarriage is packed up；
S2, the interference in air flow part 1(for packing up denoising structure are shortened by extensible member 2, and Lai Shixian packs up the interference in air flow of denoising structure
Part 1), begin to shut off undercarriage door；
S3, interference in air flow part 1 swing upwards into designated position.
By above-mentioned control method, (can interference in air flow part be put down and risen in the aircraft landing stage in aircraft
Fall frame step) risen in stage (progress packing up undercarriage and interference in air flow part step) with aircraft, reduction air-flow to undercarriage,
The effect of impact of cabin realizes the purpose of noise reduction.
Further, in step F2, when interference in air flow part 1 swings to downwards designated position, the saw of 1 bottom of interference in air flow part
Tooth and airflow direction form angle β, and angle β is 30 ° -60 °, as shown in figure 5, shown in Figure 6.When β is 30 ° -60 °, noise reduction
Effect is best, naturally it is also possible to be β be 0 ° -90 °.In step s3, when interference in air flow part 1 swings upwards into designated position, gas
Stream disruption member 1 is retracted into the intracorporal appropriate location in cabin, and undercarriage door can close.
The present invention has also listed the effect picture of the academic experiment of correlation of the noise reduction effect progress to denoising structure.Such as Figure 14 institute
Show, the experimental results when air velocity is 68m/s can be seen that β when being 30 °, and noise reduction effect is best.Such as Figure 15 institute
Show, the experimental results when air velocity is 85m/s can be seen that β when being 30 °, and noise reduction effect is best.Such as Figure 16, figure
Noise reduction effect curve shown in 17, it can be seen that denoising structure of the invention can be realized the purpose of noise reduction.
In conclusion structure is simple using a kind of denoising structure for undercarriage and cabin of the invention, it is easy
Manufacture, it is easy to accomplish, it is practical, be conducive to promote and apply；The present invention interferes incoming flow by interference in air flow part, changes
The state of air-flow changes the phase interaction of incoming flow and cabin bottom of chamber air-flow to reduce air-flow to the effect of impact of undercarriage, cabin
With, destruction the formation of noise mechanism, and then realize the purpose of noise reduction.In the aircraft landing stage, interference in air flow part can also play deceleration
Effect, can increase gas-flow resistance, shorten runway distance.Relative to current aircraft undercarriage and the uncontrolled status of cabin,
The present invention solves the problems, such as " whether there is or not ", is a kind of ground-breaking innovation and creation.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (10)
1. a kind of denoising structure for undercarriage and cabin, it is characterised in that: including interference in air flow part (1), extensible member
(2), mounting base (3)；Wherein,
The side and extensible member (2) of interference in air flow part (1) are hinged；
The other side and mounting base (3) of interference in air flow part (1) are hingedly or the top of interference in air flow part (1) is cut with scissors with mounting base (3)
It connects；
It is swung by the flexible certain driving air-flow disruption member (1) of extensible member (2) around mounting base (3), to realize interference in air flow part (1)
Put/receipts movement.
2. denoising structure as described in claim 1, it is characterised in that: the extensible member (2) is articulated with interference in air flow part (1) one
The medium position of side, mounting base (3) are articulated with the top position of interference in air flow part (1) other side.
3. denoising structure as described in claim 1, it is characterised in that: the bottom of the interference in air flow part (1) is by multiple saws
The broached-tooth design of tooth composition.
4. denoising structure as described in claim 1, it is characterised in that: the interference in air flow part (1) include connecting plate (11) and
Sawtooth group (12), sawtooth group (12) are set to connecting plate (11) bottom；Wherein,
The side and extensible member (2) of connecting plate (11) are hinged；
The other side of connecting plate (11) and mounting base (3) hingedly or the top of connecting plate (11) and mounting base (3) it is hinged.
5. denoising structure as claimed in claim 4, it is characterised in that: the sawtooth group (12) is to being hinged with extensible member (2)
The inclination of that side, sawtooth group (12) and connecting plate (11) form angle α.
6. denoising structure as described in claim 1, it is characterised in that: in the hinged of interference in air flow part (1) and mounting base (3)
Place, is equipped with the detecting element (4) for detecting interference in air flow part (1) swing angle.
7. denoising structure as claimed in claim 6, it is characterised in that: the detecting element (4) is angular encoder.
8. a kind of aircraft, it is characterised in that: including such as described in any item denoising structures of claim 1-7.
9. a kind of control method for putting/receiving interference in air flow part and undercarriage, it is characterised in that: using as claimed in claim 8
Aircraft, the control method include putting down interference in air flow part and undercarriage step, and pack up undercarriage and interference in air flow part step
Suddenly；Wherein,
In putting down interference in air flow part and undercarriage step, include the following steps:
F1, undercarriage door is started to open, puts down the interference in air flow part (1) of denoising structure；
F2, interference in air flow part (1) swing to downwards designated position；
F3, drop；
In packing up undercarriage and interference in air flow part step, include the following steps:
S1, undercarriage is packed up；
S2, the interference in air flow part (1) for packing up denoising structure, begin to shut off undercarriage door；
S3, interference in air flow part (1) swing upwards into designated position.
10. control method as claimed in claim 9, it is characterised in that: in step F2, interference in air flow part (1) is swung to downwards
When designated position, the sawtooth and airflow direction of interference in air flow part (1) bottom form angle β, and angle β is 30 ° -60 °.
Priority Applications (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111976959A (en) * | 2020-09-03 | 2020-11-24 | 西北工业大学 | Shock absorption strut capable of being used for noise reduction of undercarriage and noise reduction method |
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| CN111976959A (en) * | 2020-09-03 | 2020-11-24 | 西北工业大学 | Shock absorption strut capable of being used for noise reduction of undercarriage and noise reduction method |
| CN111976959B (en) * | 2020-09-03 | 2021-08-24 | 西北工业大学 | Shock absorption strut capable of being used for noise reduction of undercarriage and noise reduction method |
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