阅读说明：本技术 一种航发试车蜂巢降噪导流屏及使用方法 (Noise reduction flow guide screen for aviation test run honeycomb and use method ) 是由 王再发 于 2020-06-24 设计创作，主要内容包括：本发明涉及一种航发试车蜂巢降噪导流屏及使用方法,步骤如下：将导流屏通过螺栓植筋的形式固定在场地上；将飞机牵引到U状的导流屏内,机头朝向U状的导流屏外,机尾朝向U状的导流屏内屏体；启动飞机发动机,发动机气流并携带噪声冲击导流屏屏体,并进入导流屏面上的数个降噪导流杯内,气流进入降噪导流杯弧形状杯底内部形成气流反冲,在导流屏表面形成一层气垫；后续的发动机气流冲击到气垫上面,产生中和气流,随着蜂巢降噪导流屏主体弧形面改变方向,由水平气流导向为向上流动的气流,气流通过导流屏顶部的羽翼降噪导流板流出,有效的提高对气流的导流速率,极大降低噪声,起到对气流导向,噪声治理的双重效果。(The invention relates to a noise reduction flow guide screen for a test run honeycomb and a using method thereof, and the noise reduction flow guide screen comprises the following steps: fixing the diversion screen on the field in a bolt bar planting manner; the aircraft is pulled into the U-shaped flow guide screen, the aircraft nose faces the outside of the U-shaped flow guide screen, and the aircraft tail faces the inner screen body of the U-shaped flow guide screen; starting an aircraft engine, wherein engine airflow impacts a diversion screen body and enters a plurality of noise reduction diversion cups on a diversion screen surface along with noise, the airflow enters the arc-shaped cup bottoms of the noise reduction diversion cups to form airflow backflushing, and a layer of air cushion is formed on the surface of the diversion screen; subsequent engine air current strikes on the air cushion, produces the neutralization air current, falls the air current that the air deflector main part arcwall face changed direction along with the honeycomb, falls the air deflector that makes an uproar by horizontal air current direction for upflow, and the air current falls the guide plate and flows through the wing at air deflector top, and effectual improvement is to the water conservancy diversion rate of air current, greatly reduces the noise, plays the dual effect to air current direction, noise control.)

1. The utility model provides a water conservancy diversion screen of making an uproar falls in aviation sending test run honeycomb which characterized in that: comprises a flow guide screen frame (1), a honeycomb noise reduction guide plate (2), a wing noise reduction guide plate (3) and a screw rod (4);

the flow guide screen frame (1) comprises a single screen frame (1-1), a transverse connecting channel steel I (1-2), a transverse connecting channel steel II (1-3) and a connecting channel steel (1-4);

the single screen frame (1-1) comprises H steel (1-1-1), support channel steel (1-1-2), connecting angle steel I (1-1-3), connecting angle steel II (1-1-4), connecting angle steel III (1-1-5) and a flange plate seat plate (1-1-6);

the front surface of the H steel (1-1-1) is a concave arc surface, the rear surface of the H steel (1-1-1) is a convex arc surface, a supporting channel steel (1-1-2), a connecting angle steel III (1-1-5), a connecting angle steel II (1-1-4) and a connecting angle steel I (1-1-3) are respectively fixed at the rear surface of the H steel (1-1-1) to form a single screen frame (1-1), and the supporting channel steel (1-1-2), the connecting angle steel II (1-1-4) and the connecting angle steel III (1-1-5) form an acute triangle;

the single screen frames (1-1) are arranged at intervals to form a U shape, the single screen frames are fixed with a foundation through flange plate seat plates (1-1-6) at the bottom ends of H-shaped steel (1-1-1) and flange plate seat plates (1-1-6) at the bottom ends of supporting channel steel (1-1-2), a plurality of connecting channel steel (1-4) are fixed at intervals between every two adjacent single screen frames (1-1), and a plurality of guide plate frames (1-4-1) are formed by the adjacent two connecting channel steel (1-4) and the H-shaped steel (1-1-1) at two sides;

a plurality of transverse channel steels II (1-3) are horizontally fixed outside a plurality of supporting channel steels (1-1-2), a plurality of transverse channel steels I (1-2), a plurality of transverse channel steels II (1-3) and a plurality of connecting channel steels (1-4) are horizontally fixed at the upper ends of a plurality of H-shaped steels (1-1-1), and a plurality of monomer screen frames (1-1) are connected into a whole to form a diversion screen frame (1);

the honeycomb noise reduction guide plate (2) consists of a noise reduction guide cup (2-1), a guide panel (2-2) and a guide panel frame (2-3);

a noise reduction diversion cup (2-1) is respectively fixed in a plurality of diversion cup holes (2-2-3) of a diversion panel (2-2), and the diversion panel (2-2) is sleeved outside a diversion panel frame (2-3);

a honeycomb noise reduction guide plate (2) is respectively arranged on the surfaces of a plurality of guide plate frames (1-4-1) of a guide screen frame (1), the honeycomb noise reduction guide plates (2) are connected into a whole through connecting screw rods (4), and then the honeycomb noise reduction guide plates (2) connected into the whole are fixed on the guide screen frame (1) through the connecting screw rods (4);

the method is characterized in that a feather wing noise reduction guide plate (3) is respectively installed on each honeycomb noise reduction guide plate (2) on the uppermost layer of a guide screen frame (1), each feather wing noise reduction guide plate (3) is respectively fixed on each honeycomb noise reduction guide plate (2) through a connecting screw rod (4), and each feather wing noise reduction guide plate (3) is fixed on the guide screen frame (1) through a screw rod (4) through a screw rod hole of each feather wing noise reduction guide plate (3), a screw rod hole of a square tube (3-2) and screw rod holes of two single screen frames (1-1) and H steel (1-1-1);

a plurality of fixed honeycomb noise reduction guide plates (2) and a plurality of wing noise reduction guide plates (3) form an integral cambered surface along a plurality of concave cambered surfaces of transverse connecting channel steel I (1-2).

2. The noise reduction flow guide screen for test runs of aircraft of claim 1, wherein: the flow guide screen frame (1) comprises a single screen frame (1-1), a transverse connecting channel steel I (1-2), a transverse connecting channel steel II (1-3) and a connecting channel steel (1-4);

the single screen frame (1-1) comprises H steel (1-1-1), support channel steel (1-1-2), connecting angle steel I (1-1-3), connecting angle steel II (1-1-4), connecting angle steel III (1-1-5) and a flange plate seat plate (1-1-6);

the front surface of the H steel (1-1-1) is a concave arc surface, the rear surface of the H steel (1-1-1) is a convex arc surface, a flange plate seat plate (1-1-6) is fixed on the bottom surface of the H steel (1-1-1), and a plurality of convex rib plates I (1-1-1-1) are fixed on the rear surface of the H steel (1-1-1) at intervals;

the upper end of the supporting channel steel (1-1-2) is fixed with a convex rib plate I (1-1-1-1) at the upper end of the H steel (1-1-1), and a flange plate seat plate (1-1-6) is fixed at the lower end of the supporting channel steel (1-1-2);

one end of the connecting angle steel III (1-1-5) is fixed with a convex rib plate II (1-1-2-1) at the lower end of the supporting channel steel (1-1-2), and the other end of the connecting angle steel III (1-1-5) is fixed with a convex rib plate I (1-1-1-1) at the lower end of the H steel (1-1-1);

one end of the connecting angle steel II (1-1-4) is fixed with a convex rib plate II (1-1-2-1) at the middle end of the supporting channel steel (1-1-2), and the other end of the connecting angle steel II (1-1-4) is fixed with a convex rib plate I (1-1-1-1) at the lower end of the H steel (1-1-1);

the connecting angle steel I (1-1-3) is fixed with a convex rib plate II (1-1-2-1) at the middle end of the supporting channel steel (1-1-2), and the other end of the connecting angle steel I (1-1-3) is fixed with a convex rib plate I (1-1-1-1) at the middle end of the H steel (1-1-1);

the supporting channel steel (1-1-2), the connecting angle steel II (1-1-4) and the connecting angle steel III (1-1-5) form an acute triangle;

the single screen frames (1-1) are arranged into a U shape at intervals, the single screen frames (1-1) are respectively fixed with a foundation through flange plate seat plates (1-1-6) at the bottom ends of H steels (1-1-1) and flange plate seat plates (1-1-6) at the bottom ends of supporting channel steels (1-1-2), a plurality of connecting channel steels (1-4) are fixed horizontally at intervals from bottom to top along the cambered surfaces of two adjacent single screen frames (1-1) between the two adjacent single screen frames (1-1), and the two adjacent connecting channel steels (1-4) and the H steels (1-1-1) at two sides form a guide plate frame (1-4-1); horizontally screwing a plurality of transverse connecting channel steels II (1-3) at the middle positions outside the plurality of supporting channel steels (1-1-2), and fixing the plurality of supporting channel steels (1-1-2) together;

horizontally screwing a plurality of transverse connecting channel steel I (1-2) above a plurality of raised rib plates I (1-1-1-1) at the upper ends of a plurality of H steels (1-1-1), and fixing a plurality of H steels (1-1-1) together;

the structure of a plurality of transverse connecting channel steels I (1-2), a plurality of transverse connecting channel steels II (1-3) and a plurality of connecting channel steels (1-4) integrates a plurality of single screen frames (1-1) to form the diversion screen frame (1).

3. The noise reduction flow guide screen for test runs of aircraft of claim 1, wherein: the cup mouth (2-1-1) end of the noise reduction diversion cup (2-1) is tubular, a circle of convex edge (2-1-2) is arranged outwards along the cup mouth (2-1-1), and the other end integrated with the cup mouth (2-1-1) end is an arc-shaped cup bottom (2-1-3).

4. The noise reduction flow guide screen for test runs of aircraft of claim 1, wherein: the flow guide panel (2-2) is rectangular, a circle of raised walls are arranged along the periphery of the panel, a plurality of screw holes I (2-2-1) are arranged on the upper raised wall and the lower raised wall at intervals, the screw holes I (2-2-1) on the upper raised wall and the lower raised wall are symmetrically arranged, at least one screw hole II (2-2-2) is arranged on the surfaces of the left raised wall and the right raised wall, the screw holes II (2-2-2) on the left raised wall and the right raised wall are symmetrically arranged, and screw holes III (2-2-4) are respectively arranged at positions close to four corners of the panel;

the panel is horizontally provided with a plurality of rows of guide cup holes (2-2-3) at intervals, each row of guide cup holes (2-2-3) are arranged at intervals, the guide cup holes (2-2-3) in odd rows are symmetrically arranged, the guide cup holes (2-2-3) in even rows are symmetrically arranged, and each guide cup hole (2-2-3) in even rows is respectively arranged at the central position of every four guide cup holes (2-2-3) in adjacent odd rows.

5. The noise reduction flow guide screen for test runs of aircraft of claim 1, wherein: the flow guide panel frame (2-3) is rectangular, a plurality of screw holes are respectively arranged on the side surfaces of the frames around the flow guide panel frame (2-3), a plurality of screw holes IV (2-3-1) on the side surfaces of the upper frame and the lower frame are symmetrically arranged, a plurality of screw holes V (2-3-2) on the side surfaces of the left frame and the right frame are symmetrically arranged, and a plurality of screw holes VI (2-3-3) communicated with each other are arranged on the front surface and the back surface of the left frame and the right frame at intervals.

6. The noise reduction flow guide screen for test runs of aircraft of claim 1, wherein: the wing noise reduction guide plate (3) consists of a base (3-1), a square tube (3-2), a long guide inclined plate (3-3) and a short guide inclined plate (3-4);

the base (3-1) is L-shaped, a plurality of screw holes VII (3-1-1) are arranged on the bottom plate surface of the base (3-1) at intervals, a plurality of screw holes VIII (3-1-2) are arranged on the vertical plate surface of the base (3-1) at intervals, a flow guide long inclined plate (3-3) and a flow guide short inclined plate (3-4) are fixed at the upper end of the vertical plate, the bottom ends of the flow guide long inclined plate (3-3) and the flow guide short inclined plate (3-4) are arranged in a contact manner, the upper end of the flow guide long inclined plate is arranged at intervals, the upper side surface of the flow guide long inclined plate (3-3) is composed of two semi-arc surfaces (3-3-1) and a plurality of semi-circular rear wing (3-3-2), and a plurality of semi-circular rear wing (3-3-2) is arranged between, the upper side surface of the flow guide short inclined plate (3-4) is composed of a plurality of semicircular front wing wings (3-4-1), the center of each semicircular front wing (3-4-1) is correspondingly arranged at the joint of two adjacent semicircular rear wing wings (3-3-2), and the square tube (3-2) is fixed on the vertical plate surface of the base (3-1) below the flow guide long inclined plate (3-3).

7. The use method of the noise reduction and flow guide screen for the test run honeycomb of claim 1 is characterized by comprising the following steps:

fixing the diversion screen on the field in a bolt bar planting manner to form a U-shaped diversion screen, and integrally forming an arc shape to strengthen airflow guidance;

the aircraft (5) is pulled into the U-shaped flow guide screen, the nose faces the outside of the U-shaped flow guide screen, and the tail faces the inner screen body of the U-shaped flow guide screen;

starting an engine of an airplane (5), wherein the engine airflow impacts a diversion screen body with noise and enters a plurality of noise reduction diversion cups (2-1) on a diversion screen surface, the airflow enters the arc-shaped cup bottoms (2-1-3) of the noise reduction diversion cups (2-1) to form airflow backflushing, and a layer of air cushion is formed on the surface of the diversion screen;

the subsequent engine airflow impacts the air cushion to generate a neutralizing airflow, the direction of the neutralizing airflow is changed along with the change of the arc-shaped surface of the main body of the honeycomb noise-reduction flow guide screen, the horizontal airflow is guided into an upward flowing airflow, the airflow flows out through the wing noise-reduction flow guide plate (3) at the top of the flow guide screen, and the structure of the wing noise-reduction flow guide plate effectively improves the flow guide rate of the airflow and simultaneously reduces the secondary noise generated when the airflow passes through the edge of the top;

meanwhile, a plurality of noise reduction guide cups (2-1) of the honeycomb noise reduction guide plate effectively reflect the noise generated by test run of the airplane (5) in an angle mode, and the noise reduction guide cups and noise source noise sound waves are subjected to opposite impact and neutralization, so that the noise is greatly reduced, and the double effects of air flow guiding and noise control are achieved;

the structure of the noise reduction diversion cups (2-1) increases the contact area of the tail flame airflow and the noise of the airplane (5), the contact area is increased to 1.64 times of the original plane area, the wave energy consumption of the airflow and the noise generated by the increase of the area is increased, and the functions of relieving the airflow and reducing the noise are achieved;

the flow guide screens on the two sides in the U-shaped flow guide screen guide the horizontal airflow which is dispersed from the rear flow guide screen to the two sides of the tail flow of the engine of the airplane (5) into the airflow which flows upwards again, and simultaneously absorb and treat the noise on the two sides, thereby providing more comprehensive protection for the trial run of the airplane (5).

Technical Field

The invention relates to a noise reduction flow guide screen for a test honeycomb in aviation engine test and a using method thereof, in particular to a flow guide screen for reducing test noise during a high-thrust test on the ground of an airplane.

Background

The major structure who is used for reducing the diversion screen of taking a trial run noise when current aircraft ground high thrust is taken a trial run has 2 kinds:

the other is that the whole diversion screen is reinforced concrete structure, only possesses certain water conservancy diversion function, but does not have the noise reduction function, and the construction cycle of accomplishing the diversion screen is long, and building rubbish is many, can't realize the migration position.

The other diversion screen adopts a steel structure as a main structure, a panel of the wall surface part adopts a microporous plate, the rear part of the wall surface part is filled with sound-absorbing cotton and sound-absorbing materials, and the rear part of the sound-absorbing materials is sealed by a galvanized steel plate. The structure can play the dual functions of reducing noise and guiding flow. But the disadvantages are relatively obvious, and the main disadvantages comprise the following aspects

1) The original noise reduction principle of the flow guide screen is the traditional sound absorption and noise reduction principle which is not changed for more than one hundred years, namely, sound absorption materials and metal hole plates are used for absorbing sound, so that the noise reduction efficiency is low, and the failure is easy to occur; the sound-absorbing material is blown out by powder formed by air flow impact to cause the loss of the sound-absorbing material, and meanwhile, the flow guide screen gradually loses the function of noise reduction along with the loss of the sound-absorbing material and only has the function of flow guide; under the influence of natural conditions, rainwater enters the internal sound-absorbing material through the pore plates, so that the function of the sound-absorbing material is lost; inside the dust particle got into sound absorbing material through the orifice plate, blockked up the inside sound aperture of inhaling of sound absorbing material, lead to sound absorbing material thoroughly to lose the function.

2) The facial micropore plate can not provide absolute protection to inside sound absorbing material, and under the powerful dual impact air current that produces and high temperature tail flame when the aircraft apparatus is tested a car, inside sound absorbing material can be broken and splash, is blown by the air current and is flown out by facial orifice plate, thoroughly loses and inhales the sound efficiency.

3) The sound-absorbing material is blown out by powder formed by air flow impact to cause nearby environmental pollution and influence the health of people.

4) The steel construction is field weld, needs to carry out the operation of starting a fire in a large number in the field operation process, and the construction potential safety hazard is more, and the later stage shifts the position degree of difficulty great.

5) The wall installation adds a large amount of flexible sound absorbing material because of the micropore board is inside cavity itself, and the micropore board intensity itself is relatively poor, and the intensity of being connected with the main part can't be guaranteed, and along with the increase bulk strength decline of live time is obvious, and the potential safety hazard is great in the use.

6) The top of the flow guide screen is of a straight structure, secondary noise can be generated after the air flow is guided, and the overall noise reduction effect is reduced.

Disclosure of Invention

In view of the practical problems of the diversion screen with the current mainstream structure, the invention provides the noise reduction diversion screen for the aviation test run honeycomb and the use method thereof.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a water conservancy diversion screen of making an uproar falls in aviation sending test run honeycomb which characterized in that: comprises a flow guide screen frame, a honeycomb noise reduction guide plate, a wing noise reduction guide plate and a screw rod;

the flow guide screen frame comprises a single screen frame, a transverse connection channel steel I, a transverse connection channel steel II and a connection channel steel;

the single screen frame comprises H steel, a support channel steel, a connecting angle steel I, a connecting angle steel II, a connecting angle steel III and a flange plate base plate;

the front surface of the H steel is a concave arc surface, the rear surface of the H steel is a convex arc surface, a supporting channel steel, a connecting angle steel III, a connecting angle steel II and a connecting angle steel I are respectively fixed on the rear surface of the H steel to form a single screen frame, and the supporting channel steel, the connecting angle steel II and the connecting angle steel III form an acute triangle;

the single screen frames are arranged at intervals to form a U shape, the single screen frames are respectively fixed with the foundation through a flange plate base plate at the bottom end of the H steel and a flange plate base plate at the bottom end of the supporting channel steel, a plurality of connecting channel steels are fixed at intervals between every two adjacent single screen frames, and a plurality of guide plate frames are formed by two adjacent connecting channel steels and H steel on two sides;

a plurality of transverse channel steel II are horizontally fixed outside the plurality of supporting channel steel, a plurality of transverse channel steel I, a plurality of transverse channel steel II and a plurality of connecting channel steel are horizontally fixed at the upper end of the plurality of H steel, and a plurality of single screen frames are connected into a whole to form a flow guide screen frame;

the honeycomb noise reduction guide plate consists of a noise reduction guide cup, a guide panel and a guide panel frame;

a noise reduction diversion cup is respectively fixed in a plurality of diversion cup holes of a diversion panel, and the diversion panel is sleeved outside a diversion panel frame;

a plurality of honeycomb noise reduction guide plates are respectively arranged on a plurality of guide plate frame surfaces of the guide screen frame, the honeycomb noise reduction guide plates are connected into a whole through connecting screw rods, and then the honeycomb noise reduction guide plates connected into the whole are fixed on the guide screen frame through the connecting screw rods;

the method comprises the following steps that a feather wing noise reduction guide plate is respectively installed on each honeycomb noise reduction guide plate on the uppermost layer of a guide screen frame, each feather wing noise reduction guide plate is respectively fixed on each honeycomb noise reduction guide plate through a connecting screw rod, and each feather wing noise reduction guide plate is fixed on the guide screen frame through a screw rod respectively through a screw rod hole of each feather wing noise reduction guide plate, a square tube screw rod hole and two single screen frame H steel screw rod holes;

a plurality of fixed honeycomb noise reduction guide plates and a plurality of wing noise reduction guide plates form an integral cambered surface along a plurality of I-shaped cambered surfaces of transverse connecting channel steel.

A use method of a honeycomb noise reduction flow guide screen for test run of aviation engine is characterized by comprising the following steps:

fixing the diversion screen on the field in a bolt bar planting manner to form a U-shaped diversion screen, and integrally forming an arc shape to strengthen airflow guidance;

the aircraft is pulled into the U-shaped flow guide screen, the aircraft nose faces the outside of the U-shaped flow guide screen, and the aircraft tail faces the inner screen body of the U-shaped flow guide screen;

starting an aircraft engine, wherein engine airflow impacts a diversion screen body and enters a plurality of noise reduction diversion cups on a diversion screen surface along with noise, the airflow enters the arc-shaped cup bottoms of the noise reduction diversion cups to form airflow backflushing, and a layer of air cushion is formed on the surface of the diversion screen;

the subsequent engine airflow impacts the air cushion to generate a neutralizing airflow, the direction of the neutralizing airflow is changed along with the change of the arc-shaped surface of the main body of the honeycomb noise-reduction flow guide screen, the horizontal airflow is guided into an upward flowing airflow, the airflow flows out through the wing noise-reduction flow guide plate at the top of the flow guide screen, and the structure of the wing noise-reduction flow guide plate effectively improves the flow guide rate of the airflow and simultaneously reduces the secondary noise generated when the airflow passes through the edge of the top;

meanwhile, the plurality of noise reduction guide cups of the honeycomb noise reduction guide plate effectively reflect the angle of the noise generated by the test run of the airplane, and the noise reduction guide cups and the noise source noise sound wave are oppositely rushed and neutralized, so that the noise is greatly reduced, and the double effects of guiding the air flow and controlling the noise are achieved;

the contact area of the airflow and the noise of the tail flame of the airplane is increased by the aid of the noise reduction guide cup structures, the contact area is increased to 1.64 times of the original plane area, the wave energy consumption of the airflow and the noise generated due to the increase of the area is increased, and the functions of relieving the airflow and reducing the noise are achieved;

the flow guide screens on the two sides in the U-shaped flow guide screen guide the horizontal airflow which is dispersed from the rear flow guide screen to the two sides of the tail flow of the aircraft engine to the upward flowing airflow again, and simultaneously absorb and treat the noise on the two sides, thereby providing more comprehensive protection for the test run of the aircraft.

The invention has the beneficial effects that:

1) the structure has the advantages that the noise reduction guide cups are arranged on the surface of the honeycomb noise reduction guide plate, the contact area of noise is increased, the contact area is increased to 1.64 times of the original plane area, the wave energy consumption of the noise generated due to the increase of the area is increased, and the function of reducing the noise is achieved.

2) Adopt the structural style water conservancy diversion and fall and make an uproar, promptly, the honeycomb is fallen the guide plate of making an uproar and is adopted the design of acoustics principle, adopt modular equipment mode to constitute the cambered surface wall, fall the guide cup of making an uproar on the honeycomb is fallen the guide plate face of making an uproar and install a plurality of reflections, when the aircraft equipment air current and carry the noise impact to come, at the inside air current recoil that forms of guide cup, form the air cushion on the protective screen surface, the aircraft equipment air current strikes above the air cushion, produce the neutralizing air current, fall the guide screen main part arc redirecting of making an upr. Simultaneously, the effective noise generated by the test run of the aviation equipment is reflected at an angle by the diversion cup body of the honeycomb noise reduction diversion plate, and is collided and neutralized with noise source noise sound waves, so that the noise is greatly reduced, and the dual effects of air flow guiding and noise treatment are achieved.

The top sets up the feather wing and falls the guide plate of making an uproar, adopts bionical feather wing design, and the air current is more smooth and easy when putting the feather wing at the top and falling the guide plate of making an uproar, carries out very big weakening through the noise that produces to top air current, and the air current can not produce secondary noise with the diversion screen top, greatly improves the noise reduction of whole diversion screen.

3) The main steel structure is assembled by adopting module units, all the connecting parts are connected by using bolts, all the dry-process operation of field construction is realized, the operation of fire is not needed, the installation and the disassembly are convenient, and the position transfer is convenient. Construction, use, demolish, install once more and do not produce any building rubbish, greatly reduced the cost of installing once more.

4) The rigidity of the overall structure of the main steel structure is good, the strength is stable, the strength is guaranteed, and the whole wall surface is free of falling risk of any part when being impacted by strong and big tail flames and air currents of aviation equipment.

5) This structure does not adopt to inhale flexible sound absorbing material such as sound cotton, has avoided micropore board trompil direction slant up, and inside rainwater dust particle directly counts into, damages inside sound absorbing material with higher speed, loses original sound absorption function, can not lead to because of inhaling the cotton powderization of sound and float and cause the pollution to all ring edge borders, inhales sound water conservancy diversion effect and never became invalid, life greatly increased.

In a word, the invention firstly thoroughly changes the original noise reduction principle, adopts the honeycomb structure to make the noise itself carry out the hedging and neutralization, achieves the purpose of noise reduction, has good noise reduction effect, never fails, and is the substantive change of the traditional noise reduction structure and method.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial schematic view of the present invention;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a schematic representation of structure A of FIG. 3;

FIG. 5 is a schematic structural view of a screen frame according to the present invention;

FIG. 6 is an enlarged view of a portion of the structure of FIG. 5;

FIG. 7 is a schematic structural diagram of a single screen stand according to the present invention;

FIG. 8 is an exploded view of a honeycomb noise reduction baffle of the present invention;

FIG. 9 is a front view of a honeycomb noise reduction baffle structure of the present invention;

FIG. 10 is a rear view of a honeycomb noise reduction baffle structure of the present invention;

FIG. 11 is a structural cross-sectional view of a deflector panel of the present invention;

fig. 12 is a structural cross-sectional view of a noise reduction cup of the present invention;

FIG. 13 is a cross-sectional view of the configuration of a noise reducing baffle of a vane of the present invention;

FIG. 14 is an exploded view of a vane for noise reduction of a wing of the present invention;

FIG. 15 is a front view of a plurality of honeycomb noise reduction baffles of the present invention connected together;

FIG. 16 is a rear view of a plurality of honeycomb noise reduction baffles of the present invention connected together;

FIG. 17 is a state diagram of the present invention in use;

FIG. 18 is a flow chart of a method of use of the present invention.

Detailed Description

As shown in figures 1 to 16 of the drawings,

a honeycomb noise reduction guide screen for a pilot run comprises a guide screen frame 1, a honeycomb noise reduction guide plate 2, a wing noise reduction guide plate 3 and a screw rod 4.

The flow guide screen frame 1 comprises a single screen frame 1-1, transverse connecting channel steel I1-2, transverse connecting channel steel II 1-3 and connecting channel steel 1-4.

The single screen frame 1-1 comprises H steel 1-1-1, supporting channel steel 1-1-2, connecting angle steel I1-1-3, connecting angle steel II 1-1-4, connecting angle steel III 1-1-5 and flange plate seat plates 1-1-6.

The front surface of the H steel 1-1-1 is a concave arc surface, the rear surface of the H steel 1-1-1 is a convex arc surface, a flange plate seat plate 1-1-6 is welded on the bottom surface of the H steel 1-1-1, a plurality of rib plates I1-1-1-1 are welded at intervals on the rear surface of the H steel 1-1-1, and screw holes are formed in the rib plates I1-1-1-1;

the upper end of a supporting channel steel 1-1-2 and a raised rib plate I1-1-1-1 at the upper end of an H steel 1-1-1 are fixed through bolts, and a flange plate seat plate 1-1-6 is welded at the lower end of the supporting channel steel 1-1-2;

one end of a connecting angle steel III 1-1-5 is fixed with a protruding rib plate II 1-1-2-1 at the lower end of a supporting channel steel 1-1-2 through a bolt, and the other end of the connecting angle steel III 1-1-5 is fixed with a protruding rib plate I1-1-1-1 at the lower end of an H steel 1-1-1 through a bolt;

one end of a connecting angle steel II 1-1-4 is fixed with a protruding rib plate II 1-1-2-1 at the middle end of a supporting channel steel 1-1-2 through a bolt, and the other end of the connecting angle steel II 1-1-4 is fixed with a protruding rib plate I1-1-1-1 at the lower end of an H steel 1-1-1 through a bolt;

the connecting angle steel I1-1-3 is fixed with a convex rib plate II 1-1-2-1 at the middle end of the supporting channel steel 1-1-2 through bolts, and the other end of the connecting angle steel I1-1-3 is fixed with a convex rib plate I1-1-1-1 at the middle end of the H steel 1-1-1 through bolts;

the supporting channel steel 1-1-2, the connecting angle steel II 1-1-4 and the connecting angle steel III 1-1-5 form an acute triangle which is used as a support for the supporting channel steel 1-1-2.

A plurality of monomer screen frames 1-1 are arranged on the foundation ground at intervals to form a U shape, a plurality of ring flange seat plates 1-1-6 at the bottom ends of the monomer screen frames 1-1H steel 1-1-1 and ring flange seat plates 1-1-6 at the bottom ends of the supporting channel steels 1-1-2 are respectively fixed with the foundation ground, a plurality of connecting channel steels 1-4 are horizontally arranged at intervals from bottom to top between two adjacent monomer screen frames 1-1 along the cambered surfaces of the two adjacent monomer screen frames 1-1H steel 1-1-1, the connecting channel steels 1-4 at two sides of the H steel 1-1-1 are correspondingly arranged, bolts sequentially penetrate through holes 1-1-1 one side of the H steel to connect square iron 1-4-2 fixed on the end surfaces of the channel steels 1-4, holes on the supporting steel in the grooves of the H steel 1-1-1, and, The other side of the H steel 1-1-1 is connected with a hole 1-4-2 of square iron fixed on the end face of the channel steel 1-4, two connecting channel steels 1-4 are fixed on the H steel 1-1-1 in a threaded mode, and the adjacent two connecting channel steels 1-4 and the H steel 1-1-1 on the two sides form a guide plate frame 1-4-1.

Horizontally screwing a plurality of transverse channel steels II 1-3 in the middle of the outer surfaces of the plurality of supporting channel steels 1-1-2, fixing the plurality of supporting channel steels 1-1-2 together, horizontally screwing a plurality of transverse channel steels I1-2 above a raised rib plate I1-1-1-1 at the upper end of the plurality of H steels 1-1-1, and fixing the plurality of H steels 1-1-1 together;

the structure of a plurality of transverse connecting channel steels I1-2, a plurality of transverse connecting channel steels II 1-3 and a plurality of connecting channel steels 1-4 connects a plurality of monomer screen frames 1-1 into a whole to form the diversion screen frame 1.

The honeycomb noise reduction guide plate 2 consists of a noise reduction guide cup 2-1, a guide panel 2-2 and a guide panel frame 2-3.

The cup mouth 2-1-1 end of the noise reduction diversion cup 2-1 is tubular, a circle of convex edge 2-1-2 is arranged outwards along the cup mouth 2-1-1, and the other end integrated with the cup mouth 2-1-1 end is an arc-shaped cup bottom 2-1-3.

The flow guide panel 2-2 is rectangular, a circle of raised walls are arranged along the periphery of the panel, a plurality of screw holes I2-2-1 are arranged on the upper raised wall and the lower raised wall at intervals, a plurality of screw holes I2-2-1 on the upper raised wall and the lower raised wall are symmetrically arranged, at least one screw hole II 2-2-2 is arranged on the left raised wall and the right raised wall, the screw holes II 2-2-2 on the left raised wall and the right raised wall are symmetrically arranged, and screw holes III 2-2-4 are respectively arranged at the positions close to four corners of the panel;

the panel is horizontally provided with a plurality of rows of guide cup holes 2-2-3 at intervals, each row of guide cup holes 2-2-3 are arranged at intervals, the guide cup holes 2-2-3 in odd rows are symmetrically arranged, the guide cup holes 2-2-3 in even rows are symmetrically arranged, and each guide cup hole 2-2-3 in even rows is respectively arranged at the center of every four guide cup holes 2-2-3 in adjacent odd rows.

The guide panel frame 2-3 is rectangular, a plurality of screw holes are respectively arranged on the side surfaces of the frames around the guide panel frame 2-3, a plurality of screw holes IV 2-3-1 on the side surfaces of the upper and lower frames are symmetrically arranged, a plurality of screw holes V2-3-2 on the side surfaces of the left and right frames are symmetrically arranged, and a plurality of screw holes VI 2-3-3 communicated with each other are arranged on the front and back surfaces of the left and right frames at intervals; the diversion panel frame 2-3 is made of rectangular pipes.

A plurality of noise reduction diversion cups 2-1 are respectively welded in a plurality of diversion cup holes 2-2-3 of a diversion panel 2-2, a circle of raised edges 2-1-2 of the plurality of noise reduction diversion cups 2-1 are in contact fit with the surface of the diversion panel 2-2, a plurality of noise reduction diversion cups 2-1 and the surface of the diversion panel 2-2 are fixed together along the periphery of the raised edges 2-1-2 in a welding mode, and the ends 2-1-3 of the arc-shaped cup bottoms 2-1 of the plurality of noise reduction diversion cups 2-1 are positioned in a circle of raised walls;

a circle of raised walls of the guide panel 2-2 are sleeved outside a guide panel frame 2-3, screw holes I2-2-1 on the upper and lower raised walls of the guide panel 2-2 are respectively arranged corresponding to screw holes IV 2-3-1 on the upper and lower frames of the guide panel frame 2-3, and screw holes II 2-2-2 on the left and right raised walls of the guide panel 2-2 are respectively arranged corresponding to screw holes V2-3-2 on the left and right frames of the guide panel frame 2-3.

The noise reduction guide plate 3 of the wing consists of a base 3-1, a square tube 3-2, a long guide sloping plate 3-3 and a short guide sloping plate 3-4.

The base 3-1 is L-shaped, a plurality of screw holes VII 3-1-1 are arranged on the bottom plate surface of the base 3-1 at intervals, a plurality of screw holes VIII 3-1-2 are arranged on the vertical plate surface of the base 3-1 at intervals, the upper end of the vertical plate is fixed with a flow guide long inclined plate 3-3 and a flow guide short inclined plate 3-4, the bottom ends of the flow guide long inclined plate 3-3 and the flow guide short inclined plate 3-4 are arranged in contact, the upper end of the flow guide long inclined plate 3-3 is arranged at intervals, the upper side surface of the flow guide long inclined plate 3-3 is composed of two semi-arc surfaces 3-3-1 and a plurality of semi-circular rear wings 3-3-2, a plurality of semi-circular rear wings 3-3-2 are arranged between the two semi-arc surfaces 3-1, the upper side surface of the flow guide, the center of each semi-circular front wing 3-4-1 is respectively arranged corresponding to the joint of two adjacent semi-circular rear wings 3-3-2, and when in use, the square tube 3-2 is fixed on the vertical plate surface of the base 3-1 below the flow guide long inclined plate 3-3.

A honeycomb noise reduction guide plate 2 is respectively arranged on the surfaces of a plurality of guide plate frames 1-4-1 of a guide screen frame 1, a plurality of connecting screws 4 respectively penetrate through screw holes IV 2-3-1 on each adjacent honeycomb noise reduction guide plate 2, corresponding screw holes I2-2-1, screw holes V2-3-2 and corresponding screw holes II 2-2-2, a plurality of honeycomb noise reduction guide plates 2 are connected into a whole, a plurality of connecting screws 4 respectively penetrate through a plurality of screw holes VI 2-3-3 on the front surface of a guide panel frame 2-3 of each honeycomb noise reduction guide plate 2 and a plurality of screw holes IX 1-1-1-2 on a guide panel frame 1-4-1 of a corresponding guide panel frame 1, and a plurality of honeycomb noise reduction guide plates 2 connected integrally are fixed on the guide panel frame 1;

a wing noise reduction guide plate 3 is respectively arranged on each honeycomb noise reduction guide plate 2 on the uppermost layer of the guide screen frame 1, each wing noise reduction guide plate 3 is respectively fixed on each honeycomb noise reduction guide plate 2 through the matching of a screw rod 4, a screw rod hole VII 3-1-1 of the wing noise reduction guide plate 3 and a screw rod hole I2-2-1 and a screw rod hole IV 2-3-1 which are correspondingly arranged on the honeycomb noise reduction guide plate 2, and then the screw rod 4 is respectively connected with the screw rod hole VIII 3-1-2 of each wing noise reduction guide plate 3, the square tube 3-2 screw holes IX 3-2-1, H steel 1-1-1 screw holes IX 1-1-1-2 of two single screen frames 1-1 are matched, and each wing noise reduction guide plate 3 and a plurality of single screen frames 1-1 are fixed together;

the fixed honeycomb noise reduction guide plates 2 and the fixed wing noise reduction guide plates 3 form an integral cambered surface along a plurality of concave cambered surfaces of transverse connecting channel steel I1-2.

As shown in fig. 17 and 18, a method for using a honeycomb noise reduction flow guide screen for test run of aircraft includes the following steps:

fixing the diversion screen on the field in a bolt bar planting manner to form a U-shaped diversion screen, and integrally forming an arc shape to strengthen airflow guidance;

the aircraft 5 is pulled into the U-shaped flow guide screen, the nose faces the outside of the U-shaped flow guide screen, and the tail faces the inner screen body of the U-shaped flow guide screen;

starting an engine of an airplane 5, wherein the engine airflow impacts a diversion screen body with noise and enters a plurality of noise reduction diversion cups 2-1 on a diversion screen surface, the airflow enters the noise reduction diversion cups 2-1 and the arc-shaped cup bottoms 2-1-3 to form airflow backflushing, and a layer of air cushion is formed on the surface of the diversion screen;

the subsequent engine airflow impacts the air cushion to generate a neutralizing airflow, the direction of the neutralizing airflow is changed along with the change of the arc-shaped surface of the main body of the honeycomb noise-reduction flow guide screen, the horizontal airflow is guided into an upward flowing airflow, the airflow flows out through the wing noise-reduction flow guide plate 3 at the top of the flow guide screen, and the structure of the wing noise-reduction flow guide plate effectively improves the flow guide rate of the airflow and simultaneously reduces the secondary noise generated when the airflow passes through the edge of the top;

meanwhile, the plurality of cup body noise reduction guide cups 2-1 of the honeycomb noise reduction guide plate effectively reflect the noise generated by test run of the airplane 5 in an angle mode, and the noise reduction guide cups and noise sound waves of a noise source impact and neutralize, so that the noise is greatly reduced, and the double effects of guiding air flow and controlling noise are achieved;

the structure of the plurality of noise reduction diversion cups 2-1 increases the contact area of the tail flame airflow and the noise of the airplane 5, the contact area is increased to 1.64 times of the original plane area, the wave energy consumption of the airflow and the noise generated by the increase of the area is increased, and the functions of relieving the airflow and reducing the noise are achieved;

the flow guide screens on the two sides in the U-shaped flow guide screen guide the horizontal airflow which is dispersed from the rear flow guide screen to the two sides of the tail flow of the engine of the airplane 5 into the airflow which flows upwards again, and simultaneously absorb and treat the noise on the two sides, thereby providing more comprehensive protection for the trial run of the airplane 5.