Noise suppression device for overflow port of aircraft water tank

Abstract

The utility model belongs to the technical field of aircraft structural design, and relates to an aircraft water tank overflow port noise suppression device, which is arranged at an aircraft water tank overflow port and consists of a perforated plate perpendicular to overflow port airflow, and the foundation shape of the perforated plate follows the shape of a fuselage at the position of a fuselage overflow port. The noise suppression device is simple in structure and convenient to install, after the noise suppression device is installed at the water tank overflow port, the problem that noise is generated at the water tank overflow port is greatly solved, and comfort of members in a cabin is guaranteed when an airplane flies in the air.

Description

Technical Field

[0001] The utility model belongs to the technical field of aircraft structure design, and relates to a device for suppressing the noise of the overflow port of an aircraft water tank. Through this device, the noise in the aircraft cabin can be effectively reduced, thereby improving the comfort of the personnel in the aircraft cabin. Background Technique

[0002] There are two overflow ports on each side of the fuselage of a fire-fighting aircraft, which are respectively connected to 4 water tanks. After the aircraft taxis on the water surface to draw water, the excess water in the water tank will overflow through the overflow ports. However, when the aircraft is flying in the air, due to the high-speed air flowing into the overflow ports, sharp noises are generated in the aircraft cabin, seriously affecting the comfort of the crew in the aircraft cabin. In view of this, it is urgent to design a noise suppression device for the overflow ports of aircraft water tanks to eliminate the impact of noise on the aircraft cockpit. Content of the Utility Model

[0003] The main purpose of the utility model is to provide a device for suppressing the noise of the overflow port of an aircraft water tank, which is used to solve the problem of large noise in the aircraft cabin during the flight of the aircraft in the air, and ensure that the noise in the cabin is effectively reduced during the flight of the aircraft to reach the range acceptable to the cabin personnel.

[0004] Technical Solution: To achieve the above purpose, the technical solution adopted by the utility model is: A device for suppressing the noise of the overflow port of an aircraft water tank, the device is arranged at the overflow port of the aircraft water tank and is composed of a perforated plate perpendicular to the airflow of the overflow port, and the basic shape of the perforated plate follows the fuselage shape at the overflow port of the fuselage.

[0005] Furthermore, through a certain shape modification to ensure the consistency of the aerodynamic shape and reduce the air resistance during flight, which can be achieved by installing auxiliary devices on the perforated plate.

[0006] Furthermore, the perforated plate can be of a fixed structure or a structure that can be automatically opened and closed.

[0007] Furthermore, the perforated plate can adopt a cross-shaped thin plate, and an appropriate number of small holes are arranged on the thin plate.

[0008] Furthermore, the perforated plate can also adopt a curved panel with the same shape as the overflow port, and an appropriate number of small holes are arranged on the curved panel.

[0009] Furthermore, an automatic opening and closing mechanism is arranged at the boundary of the overflow port to realize the automatic opening and closing of the perforated plate.

[0010] Furthermore, the automatic opening and closing mechanism includes a shaft, a hinge, and a torsion spring; two hinges are coaxially combined, one side is fixed to the body mechanism, and the other side is fixed to the perforated plate, and the shaft passes through the central through hole of the hinge.

[0011] Technical effect: According to the requirement of reducing the noise at the overflow port of the water tank during the flight of the aircraft, through calculation and analysis, the size and the opening distribution form of the perforated plate can be designed. The structure of this device is simple and easy to install. After installing this device at the overflow port of the water tank, the problem of noise generated at the overflow port of the water tank is significantly reduced, ensuring the comfort of the cabin members during the flight of the aircraft. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of a noise suppression device for the overflow port of an aircraft water tank;

[0013] Figure 2 It is a schematic structural diagram of the noise suppression device specifically designed by the present utility model in the closed state;

[0014] Figure 3 It is a schematic structural diagram of this noise suppression device in the opened state under the impact of water flow;

[0015] Figure 4 It is a schematic structural diagram of a perforated plate specifically designed by the present utility model;

[0016] Figure 5 It is a schematic structural diagram of a perforated plate in the form of a flat plate specifically designed by the present utility model;

[0017] Figure 6 It is Figure 5 an isometric view of the perforated plate in

[0018] Among them, 1 - perforated plate, 2 - automatic opening and closing mechanism, 3 - aircraft fuselage skin, 4 - water tank overflow pipe, 5 - water tank overflow port. Specific Embodiments

[0019] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0020] As Figure 1 、 Figure 2As shown in the figure, there are two noise suppression devices for the overflow port of the aircraft water tank specifically designed in the present utility model, which adopt perforated plates in two typical structural forms. In one of the implementation cases, the perforated plate 1 adopts a cross-shaped perforated plate structure and is installed outside the overflow port 5 of the aircraft water tank, and its basic shape is consistent with the corresponding fuselage shape. The overflow port 5 of the aircraft water tank is the outlet of the overflow pipe 4 of the aircraft water tank. The overflow pipe 4 of the aircraft water tank is generally arranged inside the aircraft and is on the inner side of the aircraft fuselage skin 3. Of course, in the specific implementation process, the thickness and height of the cross-shaped perforated plate and the distribution position of the small round holes on the cross-shaped perforated plate can be adjusted according to the noise suppression effect to achieve the effect of reducing the noise in the aircraft cabin.

[0021] As a common plate-type perforated plate structure form, the perforated plate 1 used in the noise suppression device for the overflow port of the aircraft water tank is a curved plate-shaped structure matching the aircraft shape, which can completely cover the overflow port 5 of the aircraft water tank of the overflow pipe 4 of the aircraft water tank. A number of small round holes are opened on the perforated plate 1, and the distribution and aperture of the round holes can be designed according to specific needs. The specific structure is shown in Figure 5 , 6 shown.

[0022] For the noise suppression device for the overflow port of the aircraft water tank proposed in the present utility model, in the specific installation, the perforated plate 1 can be installed at the overflow port 5 of the aircraft water tank by adopting a fixed structure. As an implementable improved form, an automatic opening and closing mechanism can also be adopted to assist in the installation to realize the adaptive characteristic that the perforated plate 1 automatically opens and closes according to the water pressure. As Figures 2 - 3 shown, the present utility model is composed of a perforated plate with a torsion spring and a hinge, and is installed outside the overflow port of the aircraft water tank, and its surface shape is consistent with the corresponding fuselage shape. The thickness and height of the perforated plate, the size and distribution position of the round holes on the plate can be adjusted according to the noise suppression effect to achieve the effect of reducing the noise in the aircraft cabin.

[0023] When there is no water flow through the overflow port, the perforated plate, under the action of the hinge and the torsion spring, overcomes the air pressure difference between the overflow pipe and the outside and the inertial force of the perforated plate to maintain the perforated plate in a closed state and reduce the noise of the overflow port. When the water tank is full of water and there is water flow through the overflow port, at this time the water pressure is greater than the force for the hinge and the torsion spring to maintain the perforated plate in a closed state. Under the impact of the water flow, the perforated plate opens to realize the overflow function. When the water intake action of the aircraft is completed and there is no longer water flow through the overflow port, the water pressure disappears. Under the action of the hinge and the torsion spring, the perforated plate returns to the closed state.

[0024] The above specific implementation manners or cases are only used to explain the technical solution of the present utility model, rather than limiting the present utility model. The parts not described in detail are regarded as conventional technical means in the art. Those of ordinary skill in the art should understand that based on the design concept of this application, it should be possible to adaptively modify the technical solution described in the foregoing implementation manners, or perform equivalent replacements on some or all of the technical features therein. These modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A noise suppression device for an aircraft water tank overflow port, characterized in that: The device is arranged at the overflow port of the aircraft water tank and is composed of a porous plate perpendicular to the airflow of the overflow port. The basic shape of the porous plate follows the shape of the fuselage at the overflow port of the fuselage.

2. The aircraft water tank overflow outlet noise suppression device according to claim 1, characterized in that: The porous plate is a fixed structure or a structure that can be opened and closed automatically.

3. The aircraft water tank overflow noise suppression device according to claim 1, characterized in that: The porous plate is a cross-shaped thin plate, on which a proper number of small holes are arranged.

4. The aircraft water tank overflow noise suppression device according to claim 1, characterized in that: The porous plate adopts a curved plate with the same shape as the overflow outlet, and a proper number of small holes are arranged on the curved plate.

5. The aircraft water tank overflow outlet noise suppression device according to any one of claims 1 to 4, characterized in that: An automatic opening and closing mechanism is arranged at the border of the overflow outlet to realize the automatic opening and closing of the porous plate.

6. The aircraft water tank overflow noise suppression device according to claim 5, characterized in that: The automatic opening and closing mechanism includes a shaft, a hinge, and a torsion spring; two hinges are coaxially assembled, one side is fixed on the body mechanism, and the other side is fixed on the porous plate, the shaft passes through the central through hole of the hinge, and the torsion spring is arranged on the shaft.

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