Flow blocking device and airplane water throwing cabin door with same

Abstract

The invention discloses a flow blocking device and an aircraft water throwing cabin door with the flow blocking device. The flow blocking device comprises a flow blocking plate, and the flow blocking plate is in a fan shape; the front side of the flow baffle is a windward side, and the rear side of the flow baffle is a leeward side; an external reinforcing vertical rib is arranged on the front side of the flow baffle along the edge, and a plurality of internal reinforcing vertical ribs are arranged in the external reinforcing vertical rib; the two sides of the straight edge of the flow baffle are connected with supporting devices correspondingly, and the supporting devices are used for installing and fixing the flow baffle. The structure is simple and novel, machining is easy, main flow baffle parts are convenient to disassemble, the bearing capacity is high, the strength design requirement under the aerodynamic load or overload effect is met, the head-up phenomenon of the aircraft in the flight attitude in the fire extinguishing medium discharging process can be greatly improved, the problem that it is strenuous for a pilot to operate a steering column is effectively solved, and the practicability is high. The device can be applied to a fire extinguishing medium throwing cabin door of a forest aviation fire-fighting aircraft.

Description

Technical Field

[0001] The present application belongs to the field of aircraft structure design, and relates to a flow blocking device and an aircraft water-dropping hatch with the flow blocking device. Background Art

[0002] The ability to airdrop liquid fire extinguishing media is an important firefighting capability of forest aviation firefighting aircraft. It requires the crew to operate the aircraft to accurately drop the fire extinguishing media at a specified altitude and speed. If the error is one second, the landing point of the fire extinguishing media may deviate by tens or even hundreds of meters. Not only that, during the entire delivery process, the aircraft must maintain stable flight, because after the aircraft's water-dropping hatch is opened, a large amount of fire extinguishing media must be discharged within a few seconds. The aerodynamic layout and weight of the entire aircraft will change greatly, which will bring great difficulty to the pilot's operation. The pilot is required to control the state of the aircraft as soon as possible, and ensure that the speed, altitude, and heading are within a certain error range to ensure that the fire extinguishing medium is accurately dropped over the target.

[0003] A certain type of aircraft is equipped with four fire extinguishing medium discharge ports on the belly, and each discharge port is equipped with a water-dropping hatch, which provides storage and discharge functions for the fire extinguishing medium in the aircraft cabin. In the actual delivery process, since a large amount of fire extinguishing medium is discharged in a few seconds, the aerodynamic layout, weight and weight center of gravity of the entire aircraft change greatly in an instant, and the aircraft's flight attitude - the head-up phenomenon is very obvious. The pilot has difficulty in operating the joystick, which brings certain difficulties to the pilot's operation of the aircraft and affects the pilot's ability to control the aircraft as soon as possible. Therefore, it has become a technical problem that needs to be solved to easily control the aircraft attitude by operating the joystick. Summary of the invention

[0004] The purpose of the present application is to solve the problem of airflow diversion during the process of aircraft dropping fire extinguishing medium, and to provide a baffle device and an aircraft water dropping door with the baffle device. The baffle of the present application should not only change the aerodynamic layout of the aircraft during the water dropping process so that the pilot can easily control the aircraft attitude, but also meet the strength design requirements under aerodynamic load or overload.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions: In the first aspect, the present application proposes a flow baffle device, comprising a flow baffle, which is fan-shaped; the front side of the flow baffle is the windward side, and the rear side is the leeward side; the front side of the flow baffle is provided with external reinforcing ribs along the edge, and a plurality of internal reinforcing ribs are provided inside the external reinforcing ribs; support devices are respectively connected to both sides of the straight edge of the flow baffle for fixing the installation of the flow baffle.

[0006] Furthermore, at least one internal reinforcing rib is arranged inside the baffle.

[0007] Furthermore, a baffle skin is arranged on the rear side of the baffle, between the external reinforcing ribs and the internal reinforcing ribs, and between a plurality of the internal reinforcing ribs.

[0008] Furthermore, the support device includes a front support member and a plurality of rear support members; the front support member is an L-shaped vertical rib structure, and oblique ribs are also arranged between the L-shaped vertical rib structures.

[0009] Furthermore, one side of the front support member is detachably connected to a baffle cover on the baffle, and the other side is used to fix the baffle.

[0010] Furthermore, a plurality of connecting ears are arranged at intervals on one side of the front support member connected to the baffle plate.

[0011] Furthermore, the rear support member is arranged in the fitting area of ​​the evenly arranged internal reinforcement ribs and the external reinforcement ribs of the spoiler, so as to fix the spoiler.

[0012] In the second aspect, the present application proposes an aircraft water-dropping door, comprising a water-dropping door body arranged on the belly structure, and the above-mentioned flow-blocking device; the baffle plate of the flow-blocking device is installed on the inner side of a pair of water-dropping door bodies on the front side.

[0013] Furthermore, the baffle is installed on the flooding hatch body through a front support member and a rear support member, and is airtightly connected to the flooding hatch body.

[0014] Furthermore, the installation direction of the baffle is perpendicular to the heading of the aircraft.

[0015] Compared with the prior art, this application has the following beneficial effects: The present application provides a baffle plate on a water-dropping hatch of an aircraft, which has a simple and novel structure and is easy to process. The main baffle plate parts are easy to disassemble and have a strong load-bearing capacity. The baffle plate meets the strength design requirements under aerodynamic loads or overloads, and can greatly improve the phenomenon of the aircraft's flying attitude rising during the discharge of fire-extinguishing media, effectively solving the problem of the pilot's difficulty in operating the joystick. The baffle plate can be applied to the fire-extinguishing medium delivery hatch of forest aviation fire-fighting aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1This is a schematic diagram of the structure of the baffle of this application.

[0018] Figure 2 This is a schematic structural diagram of the front support member of the present application.

[0019] Figure 3 This is a schematic diagram of the installation of the baffle on the water-dropping door of the aircraft in this application.

[0020] Figure 4 This is a schematic diagram of the installation of the baffle on the water-dropping door of the aircraft in this application.

[0021] Figure 5 This is a schematic diagram of the arrangement of the baffle and surrounding structures on the water-dropping door of the aircraft in this application.

[0022] Among them: 1-belly structure; 2-water-dropping door; 3-water-dropping door body; 4-baffle; 5-front support; 6-rear support; 7-baffle skin; 8-external reinforcement ribs; 9-internal reinforcement ribs; 10-connecting ears. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] The present application is further described in detail below with reference to the accompanying drawings: See also Figure 1 The embodiment of the present application discloses a baffle device, including a baffle plate 4, which is fan-shaped; the front side of the baffle plate 4 is the windward side, and the rear side is the leeward side; the front side of the baffle plate 4 is provided with external reinforcement ribs 8 along the edge, and a plurality of internal reinforcement ribs 9 are provided inside the external reinforcement ribs 8; the straight sides of the baffle plate 4 are respectively connected with support devices for fixing the installation of the baffle plate 4. At least three internal reinforcement ribs 9 are provided inside the baffle plate 4. On the rear side of the baffle plate 4, a baffle plate skin 7 is provided between the external reinforcement ribs 8 and the internal reinforcement ribs 9, and the plurality of internal reinforcement ribs 9.

[0030] It should be noted that the fan-shaped design of the baffle 4 enables the windward side to capture and guide the fluid more effectively, while the leeward side reduces the resistance when the fluid passes through, thereby improving the overall flow blocking efficiency. The curvature of the fan can be optimized according to the fluid dynamic characteristics in the actual application scenario to achieve the best flow blocking effect. The external reinforcing ribs 8 are arranged along the front edge of the baffle 4, which not only enhances the edge strength of the baffle and prevents deformation due to long-term fluid impact, but also serves as a skeleton connecting the skin and other components, thereby improving the stability and durability of the overall structure. The internal reinforcing ribs 9 are arranged inside the baffle, and the number is at least 3. They are staggered or connected to the external reinforcing ribs 8 to form a stable support network. This design effectively disperses the pressure of the fluid on the baffle, further enhancing the impact resistance and stability of the structure. The number and layout of the internal reinforcing ribs can be adjusted according to the size of the baffle and the pressure required to be borne. Support devices are provided on both sides of the straight edge of the baffle 4 to ensure that the baffle can be stably installed in a predetermined position. The baffle skin 7 covers the space between the external reinforcing ribs 8 and the internal reinforcing ribs 9 on the rear side of the baffle, as well as the space between the internal reinforcing ribs 9, which not only protects the internal structure from direct erosion by the fluid, but also reduces the friction resistance of the fluid passing through through its surface smoothness, thereby improving the baffle efficiency.

[0031] In practical applications, the baffle structure of the present application mainly includes: baffle 4, front support 5 and rear support 6. Baffle 4 is the main airflow guide structure, and front support 5 and rear support 6 are arranged in front and rear of baffle 4 respectively. Front support 5 and rear support 6 of baffle are respectively connected to water-dropping door body 3 by fasteners that do not need to be disassembled, and baffle 4 is respectively connected to front support 5 and rear support 6 by detachable fasteners, and baffle 4 can be disassembled at any time according to flight needs.

[0032] Specifically, the baffle plate 4 of the present application is a rigid integral machined structural member, and its structural shape is fan-shaped. When it moves with the water-dropping door body 3, it leaves sufficient movement clearance with other fixed structures. The baffle plate 4 is composed of a baffle plate skin 7, external reinforcing ribs 8, and three internal reinforcing ribs 9. The baffle plate skin 7 is the main structure for disturbing the high-speed airflow in the heading direction; the three internal reinforcing ribs 9 are arranged roughly evenly in the vertical direction. In order to improve the rigidity and bearing capacity of the baffle plate, the external reinforcing ribs 8 are arranged circumferentially along the fan-shaped contour; a square notch is made on the external reinforcing ribs 8 where the baffle plate 4 fits the water-dropping door body 3, so as to facilitate the disassembly of the baffle plate 4.

[0033] Through the carefully designed fan-shaped structure and spoiler skin, the deflector can efficiently change the direction and speed of airflow to meet specific flight requirements. The detachable connection design makes the replacement and maintenance of the deflector simple and quick, reducing maintenance costs and time. The clever combination of internal and external reinforcement ribs ensures the stability and safety of the deflector under high-intensity airflow. The airtight connection design with the flood hatch door effectively prevents airflow leakage and improves the efficiency of the entire system.

[0034] In another feasible embodiment, a front support member is arranged on the front face of the baffle, and the front support member is an L-shaped vertical rib structure, and there are oblique ribs between the L-shaped vertical rib structures. The vertical ribs on one side of the L-shaped structure of the front support member are airtightly connected and fixed to the door body of the water-dropping hatch; the vertical ribs on the other side of the L-shaped structure are fitted with the skin surface of the baffle, and are detachably fastened to the baffle skin. Several connecting ears are also provided on the side vertical ribs, and each connecting ear is also detachably fastened to the baffle and the rear support member. It should be noted that the front face of the baffle is arranged with a front support member, and these support members adopt an L-shaped vertical rib structure, which not only provides a stable support, but also enhances the overall rigidity of the structure through its shape design. The vertical ribs on one side of the L-shaped vertical rib are airtightly connected and fixed to the door body of the water-dropping hatch, ensuring that the airflow will not leak from the connection, thereby improving the airtight performance of the system. The ribs on the other side fit tightly against the baffle skin surface and are connected to the baffle through a detachable fastening connection method, which facilitates the removal and replacement of the baffle. Diagonal ribs are also arranged between the L-shaped rib structures. These diagonal ribs further enhance the stability and load-bearing capacity of the front support, making the baffle more stable under the action of high-speed airflow. Several connecting ears are provided on the sides of the L-shaped ribs. These connecting ears not only provide additional connection points, but also connect to the baffle and rear support through a detachable fastening connection method, forming a more stable support network. The connection between the connecting ears and the baffle and rear support adopts a detachable fastening method, such as bolts, etc. This design makes the entire baffle structure more modular and easy to disassemble, replace and repair.

[0035] In another feasible embodiment, a plurality of rear support members 6 are arranged on the rear side of the baffle 4 of the present application. The rear support members 6 are sheet metal or machined three-sided box-shaped structures. The rear support members 6 are arranged in the area where the evenly arranged internal reinforcement ribs 9 and the external reinforcement ribs 8 of the baffle 4 are in contact. The rear support members 6 are fixed to the flooding hatch door body through the bottom ribs and airtight connection. The other two sides thereof are connected to the skin surface corresponding to the baffle 4, the external reinforcement ribs 8 or the internal reinforcement ribs 9 through detachable fasteners. It should be noted that the rear support members 6 are sheet metal or machined three-sided box-shaped structures. Such structures not only have high strength and rigidity, but also can effectively disperse and bear the load from the baffle 4. The selection of materials ensures the corrosion resistance and long-term stability of the support members. The rear support members 6 are cleverly arranged in the area where the evenly arranged internal reinforcement ribs 9 and the external reinforcement ribs 8 of the baffle 4 are in contact. Such an arrangement not only enhances the structural integrity of the baffle, but also ensures the close fit between the support members and the baffle. The rear support member 6 is airtightly connected and fixed to the flooding hatch body through the bottom ribs. This connection method not only ensures that the airflow will not leak from the gap between the support member and the door body, but also improves the airtightness of the entire system. The other two sides of the rear support member 6 are connected to the skin surface corresponding to the baffle 4, the external reinforcement ribs 8 or the internal reinforcement ribs 9 through detachable fasteners. This design makes the disassembly, replacement and maintenance of the baffle 4 more flexible and convenient, reducing maintenance costs and time.

[0036] The supporting device comprises a front supporting member 5 and a plurality of rear supporting members 6; the front supporting member 5 is an L-shaped vertical rib structure, and oblique ribs are arranged between the L-shaped vertical rib structures.

[0037] One side of the front support member 5 is detachably connected to the baffle skin 7 on the baffle 4, and the other side is used to fix the baffle 4. A plurality of connecting lugs 10 are arranged at intervals on the side where the front support member 5 is connected to the baffle 4, such as Figure 2 As shown. The rear support member 6 is arranged in the fitting area of ​​the evenly arranged internal reinforcement ribs 9 and the external reinforcement ribs 8 of the baffle 4, and is used to fix the baffle 4. It should be noted that the front support member 5 adopts an L-shaped rib structure, which not only provides a stable support, but also enhances the rigidity of the front end of the baffle 4 through its shape design. Diagonal ribs are also arranged between the L-shaped ribs, which further enhances the stability and bearing capacity of the support member. The rear support member 6 is arranged in the fitting area of ​​the evenly arranged internal reinforcement ribs 9 and the external reinforcement ribs 8 of the baffle 4. These support members are used to fix the baffle 4 to ensure that it remains stable under the action of high-speed airflow.

[0038] like Figure 3 and Figure 4As shown, the embodiment of the present application provides an aircraft water-dropping hatch, comprising four water-dropping hatch bodies 3 arranged on a belly structure 1, and a flow-blocking device; a flow-blocking plate 4 of the flow-blocking device is installed on the inner side of a pair of water-dropping hatch bodies 3 on the front side. The flow-blocking plate 4 is installed on the water-dropping hatch body 3 through a front support member 5 and a rear support member 6, and is airtightly connected to the water-dropping hatch body 3. The installation direction of the flow-blocking plate 4 is perpendicular to the heading of the aircraft.

[0039] In practical applications, the baffle of the present application is installed on the inner side of the front end of the water-dropping door body in the heading direction, and the installation direction of the baffle is perpendicular to the heading of the aircraft. The baffle and the water-dropping door body are opened and closed together with the water-dropping door to change the aerodynamic layout of the aircraft during the water-dropping process. When the water-dropping door is closed, the baffle is located in the fire-extinguishing medium storage compartment. When the water-dropping door is opened to discharge the fire-extinguishing medium, the water-dropping door is opened, and the baffle moves to the working position with the door to disturb the high-speed airflow in the heading direction, thereby changing the aerodynamic layout of the aircraft during the water-dropping process.

[0040] See also Figure 5 In this embodiment, a certain type of aircraft is used as a carrier and four fire extinguishing medium discharge ports are symmetrically arranged on the belly structure 1. Each discharge port is provided with a water-dropping door 2. The baffles proposed in this application are respectively located on the two water-dropping door bodies 3 on the left and right sides of the front end of the aircraft, and the baffles on the left and right sides are symmetrical.

[0041] The front support member 5 in the implementation is arranged at the front end face of the baffle plate 4. The front support member 5 is an L-shaped vertical rib structure, and there are oblique ribs between the L-shaped vertical rib structures. The vertical ribs on one side of the L-shaped front support member 5 are connected and fixed to the flooding hatch door body 3 in an airtight manner; the vertical ribs on the other side of the L-shaped structure are in contact with the baffle plate skin 7, and are detachably fastened to the baffle plate skin 7. Several connecting ears 10 are also provided on the side vertical ribs, and each connecting ear 10 is also detachably fastened to the baffle plate 4 and the rear support member 6.

[0042] The structure and working principle of this application: The entire baffle of the present application is installed on the inner side of the front end position of the water-dropping door body 3 in the heading direction, and the installation direction of the baffle 4 is perpendicular to the heading of the aircraft. The entire baffle and the water-dropping door body 3 are opened and closed with the water-dropping door 2 to change the aerodynamic layout of the aircraft during the water-dropping process. When the water-dropping door 2 is closed, the entire baffle is located in the fire-extinguishing medium storage cabin. When the water-dropping door 2 is opened to discharge the fire-extinguishing medium, the water-dropping door 2 is opened, and the entire baffle moves to the working position with the door, disturbing the high-speed airflow in the heading direction, changing the aerodynamic layout of the aircraft during the water-dropping process, and realizing that the pilot can easily manipulate the joystick to control the flight state of the aircraft.

[0043] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flow blocking device, characterized in that: The invention comprises a baffle (4), wherein the baffle (4) is fan-shaped; the front side of the baffle (4) is a windward side, and the rear side is a leeward side; the front side of the baffle (4) is provided with external reinforcing ribs (8) along the edge, and a plurality of internal reinforcing ribs (9) are provided inside the external reinforcing ribs (8); and support devices are respectively connected to both sides of the straight edge of the baffle (4) for fixing the baffle (4) on its installation.

2. The flow blocking device according to claim 1, characterized in that: At least three internal reinforcing ribs (9) are arranged inside the baffle (4).

3. The flow blocking device according to claim 1 or 2, characterized in that: On the rear side of the baffle plate (4), a baffle plate skin (7) is arranged between the external reinforcing ribs (8) and the internal reinforcing ribs (9), as well as between a plurality of the internal reinforcing ribs (9).

4. The flow blocking device according to claim 1 or 2, characterized in that: The support device comprises a front support member (5) and a plurality of rear support members (6); the front support member (5) is an L-shaped vertical rib structure, and oblique ribs are arranged between the L-shaped vertical rib structures.

5. The flow blocking device according to claim 4, characterized in that: One side of the front support member (5) is detachably connected to the baffle skin (7) on the baffle (4), and the other side is used to fix the baffle (4).

6. The flow blocking device according to claim 4, characterized in that: A plurality of connecting lugs (10) are arranged at intervals on one side of the front support member (5) connected to the baffle plate (4).

7. The flow blocking device according to claim 4, characterized in that: The rear support member (6) is arranged in the fitting area of ​​the evenly arranged internal reinforcement ribs (9) and the external reinforcement ribs (8) of the baffle plate (4), and is used to fix the baffle plate (4).

8. An aircraft water-dropping door, comprising four water-dropping door bodies (3) arranged on a belly structure (1), and a baffle device according to any one of claims 1 to 7; the baffle plate (4) of the baffle device is installed on the inner side of a pair of water-dropping door bodies (3) on the front side.

9. The aircraft flooding door according to claim 8, characterized in that: The baffle plate (4) is mounted on the water-dropping door body (3) via a front support member (5) and a rear support member (6), and is airtightly connected to the water-dropping door body (3).

10. The aircraft flooding door according to claim 9, characterized in that: The installation direction of the baffle (4) is perpendicular to the heading of the aircraft.

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