Aircraft firebombing platform

Abstract

The application provides an aircraft fire extinguishing bomb mounting platform, which comprises two front supports, two rear supports, a front corner box and a rear corner box; the front corner box is oppositely arranged with the rear corner box; the front corner box and the rear corner box are fixedly connected through a base, which is used for balancing the gravity moment of the fire extinguishing bomb self-weight on the front beam and the rear beam; the two bases are symmetrical about the symmetry axis of the aircraft fuselage; two fire extinguishing bombs are arranged at the lower part of the aircraft belly, and the other two fire extinguishing bombs are arranged at the lower part of the left and right wings; the mounting rack is provided with a fuselage belly reinforcing structure, the fuselage belly reinforcing structure comprises longitudinal reinforcing structures arranged on the front beam and the rear beam respectively, a transverse reinforcing structure arranged between the longitudinal reinforcing structures and end transverse reinforcing parts arranged between the two ends of the longitudinal reinforcing structures; the fuselage belly reinforcing structure is used for balancing the fire extinguishing bomb mounted on the aircraft belly due to the self-gravity, the inertial moment along the heading direction during flight and the lateral bending moment generated during turning during normal flight of the aircraft.

Description

Technical Field

[0001] This invention relates to the field of aircraft technology, and in particular to a fire extinguishing bomb mounting platform for Y5 / Y5B series aircraft. Background Technology

[0002] With technological advancements and the need for national emergency rescue system construction, aviation power has begun to be heavily invested in emergency rescue. Currently, aviation power is mainly used for aerial patrol and monitoring, reconnaissance and command, and personnel transport in firefighting and rescue operations. Although some aircraft also participate in aerial water spraying and fire extinguishing agent dispersal, the firefighting efficiency is not high. Precision-guided fire extinguishing bombs have emerged to address this need. By dropping guided fire extinguishing bombs from aircraft, it is possible to "strike early, extinguish small, and extinguish effectively" initial fires, putting large fires out in their nascent stage.

[0003] Since fire extinguishing bombs are generally in the range of 100 to 200 kg, helicopters are limited in the number they can carry due to their own structural limitations. Fixed-wing aircraft can make full use of the space in their fuselage and wings to carry fire extinguishing bombs.

[0004] General aviation aircraft are generally not designed to handle heavy external loads, and their structures are generally weaker than those of military aircraft. In particular, the wings of the Y5 / Y5B series aircraft are characterized by numerous and dense ribs and a fabric skin structure that only provides shape and does not bear load. The fuselage and wings of fixed-wing aircraft are difficult to directly withstand the weight of fire extinguishing bombs, which needs to be addressed. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide a Y5 / Y5B series aircraft fire extinguishing bomb mounting platform that can carry four 200kg-class fire extinguishing bombs or eight 100kg-class fire extinguishing bombs, thus solving the problem of transporting and deploying precision-guided fire extinguishing bombs.

[0006] To solve this problem, it is necessary to fully consider the specific structure and strength requirements of the aircraft fuselage and wings, as well as the shape and size of the fire extinguishing bomb, and to rationally determine the location of the fire extinguishing bomb with the goal of minimizing the impact on the aircraft's aerodynamics and strength.

[0007] The design of the scheme also needs to take into account the shape of the fire extinguishing bomb and the angle of attack during takeoff and landing, and reinforcement should be carried out between the fuselage frames. In order to balance the load under the belly during normal flight due to its own weight, the inertial moment along the flight direction during flight, and the lateral bending moment generated during turning, the following force transmission design is carried out.

[0008] Taking a 200kg fire extinguishing bomb as an example, through necessary aerodynamic analysis and strength verification, it was finally determined that two fire extinguishing bombs would be mounted on the fuselage underside and one fire extinguishing bomb would be mounted on the underside of each of the left and right wings.

[0009] To achieve the objectives of this invention, the invention is implemented through the following technical solutions:

[0010] A fire extinguishing bomb mounting platform for Y5 / Y5B series aircraft is installed on a pylon under the fuselage of the aircraft. The pylon has a grid-shaped frame structure and includes a front beam, a rear beam, and several connecting ribs between the front and rear beams. Its features include two front supports spaced apart on the front beam, two rear supports spaced apart on the rear beam, front corner boxes respectively mounted on the front supports, and rear corner boxes respectively mounted on the rear supports. The front and rear corner boxes are arranged opposite each other. The front and rear corner boxes are fixedly connected by bases to balance the gravitational moment generated by the fire extinguishing bomb's own weight on the front and rear beams. The two bases are symmetrical about the aircraft fuselage axis.

[0011] Two fire extinguishing bombs are located under the fuselage, and the other two fire extinguishing bombs are located under the left and right wings respectively.

[0012] The pylon is equipped with a fuselage underbelly reinforcement structure to balance the lateral bending moment generated by the fire extinguishing bombs mounted under the fuselage during normal flight due to their own weight, the inertial moment along the flight direction, and the turning.

[0013] Furthermore, the fuselage belly reinforcement structure includes longitudinal reinforcement structures respectively provided on the front beam and the rear beam, transverse reinforcement structures provided between the longitudinal reinforcement structures, and end transverse reinforcement portions respectively provided between the two ends of the longitudinal reinforcement structures.

[0014] Furthermore, the longitudinal reinforcement structure includes a reinforcement support fixedly connected to the front beam and a crossbeam fixedly connected to the reinforcement support. There are two reinforcement supports, which are respectively located at both ends of the crossbeam.

[0015] Furthermore, the transverse reinforcement structure includes mounting joints and connecting beams; the mounting joints are fixedly connected to the middle of the crossbeam; there are two mounting joints, and the connecting beam is installed between the two mounting joints.

[0016] Furthermore, the end transverse reinforcement includes four support rods, with each pair of support rods forming a group. One end of the support rod is fixedly connected to one end of the crossbeam on the front beam; the other end of the support rod is fixedly connected to the other end of the crossbeam; and a group of support rods is provided at each end of the crossbeam.

[0017] Furthermore, the connecting beam is provided with reinforcing beams at both ends.

[0018] Furthermore, the connecting beam is a channel steel structure, and reinforcing ribs are provided inside the channel steel.

[0019] Furthermore, the connecting beam has a rear connector in the middle; one end of the connecting beam has a front connector; both the front connector and the rear connector are equipped with fire extinguishing bombs.

[0020] Furthermore, one end of the connecting beam on the rear beam is provided with a front connecting seat; one end of the connecting beam on the front beam is provided with a rear connecting seat; and skins are fixed to the surfaces of the front connecting seat and the rear connecting seat.

[0021] Furthermore, the installation joints include an upper joint that is fixedly connected to the base plate of the machine body and a lower joint that is fixedly connected to the connecting beam.

[0022] The beneficial effects of this invention are as follows:

[0023] By setting sufficiently large front and rear supports on the aircraft frame (rack), and connecting the front and rear supports to the upper and lower edge strips of the frame, the lateral bending moment is transferred to the fuselage floor of the aircraft frame; the base of the fixed rack is connected to the front and rear supports through the front and rear corner boxes to balance the gravitational moment generated by the weight of the fire extinguishing bomb on the fuselage frame.

[0024] By installing a reinforcing structure on the fuselage belly, the fuselage belly is reinforced to prevent deformation caused by the weight of the fire extinguishing bombs, which could affect aircraft safety. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the fuselage underbelly reinforcement structure of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the fuselage underside reinforcement structure of the present invention from another angle.

[0028] Figure 4 This is a three-dimensional structural diagram of the crossbeam of the present invention;

[0029] Figure 5 This is a three-dimensional structural diagram of the beam of the present invention from another angle;

[0030] Figure 6 Exploded color diagram of the underside reinforcement structure of the fuselage.

[0031] Among them: 1-reinforced support, 2-crossbeam, 3-support rod, 5-skin, 6-front connecting seat, 7-connecting beam, 8-hanger, 11-rear joint, 21-installation joint, 51-front joint. Detailed Implementation

[0032] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0033] Example 1

[0034] A fire extinguishing bomb mounting platform for Y5 / Y5B series aircraft is mounted on a pylon 8 under the fuselage of the aircraft. The pylon 8 has a grid-shaped frame structure and includes a front beam, a rear beam, and several connecting ribs between the front and rear beams. Its features include two front supports spaced apart on the front beam, two rear supports spaced apart on the rear beam, front corner boxes respectively mounted on the front supports, and rear corner boxes respectively mounted on the rear supports. The front and rear corner boxes are arranged opposite each other. The front and rear corner boxes are fixedly connected by bases to balance the gravitational moment generated by the weight of the fire extinguishing bomb on the front and rear beams. The two bases are symmetrical about the axis of symmetry of the aircraft fuselage.

[0035] Two fire extinguishing bombs are located under the fuselage, and the other two fire extinguishing bombs are located under the left and right wings respectively.

[0036] The pylon 8 is equipped with a fuselage underbelly reinforcement structure to balance the lateral bending moment generated by the fire extinguishing bombs mounted under the fuselage during normal flight due to their own weight, the inertial moment along the flight direction, and the turning.

[0037] The fuselage belly reinforcement structure includes longitudinal reinforcement structures respectively provided on the front beam and the rear beam, transverse reinforcement structures provided between the longitudinal reinforcement structures, and end transverse reinforcements respectively provided between the two ends of the longitudinal reinforcement structures.

[0038] The longitudinal reinforcement structure includes a reinforcement support 1 fixedly connected to the front beam and a crossbeam 2 fixedly connected to the reinforcement support. There are two reinforcement supports 1, which are respectively located at both ends of the crossbeam 2.

[0039] The transverse reinforcement structure includes a mounting joint 21 and a connecting beam 7; the mounting joint 21 is fixedly connected to the middle of the crossbeam 2; there are two mounting joints 21, and the connecting beam 7 is installed between the two mounting joints 21.

[0040] The end transverse reinforcement includes four support rods 3, with each pair of support rods 3 forming a group. One end of the support rod 3 is fixedly connected to one end of the crossbeam 2 on the front beam; the other end of the support rod 3 is fixedly connected to the other end of the crossbeam 2; and a group of support rods 3 is provided at each end of the crossbeam 2.

[0041] The connecting beam 7 is equipped with a reinforcing beam.

[0042] The connecting beam 7 is provided with a rear connector 11 in the middle; one end of the connecting beam 7 is provided with a front connector 51; both the front connector 51 and the rear connector 11 are provided with fire extinguishing bombs.

[0043] The connecting beam 7 on the rear beam is provided with a front connecting seat 6 at one end; the connecting beam 7 on the front beam is provided with a rear connecting seat at one end; the surfaces of the front connecting seat 6 and the rear connecting seat are fixed with skin 5.

[0044] Mounting connector 21 includes an upper connector that is fixedly connected to the base plate of the machine body and a lower connector that is fixedly connected to the connecting beam 7.

[0045] The fixed connection method of this application adopts riveting or bolt and nut connection, and welding is prohibited to avoid stress concentration and damage to the structure of the machine body.

[0046] Example 2

[0047] This embodiment is a further improvement on embodiment 1.

[0048] The connecting beam 7 is a channel steel structure, and reinforcing ribs are provided inside the channel steel. This can enhance the strength of the connecting beam 2.

[0049] Example 3

[0050] This embodiment is basically the same in structure as Embodiment 1, but the structure of this application is described in more detail;

[0051] Considering the shape of the fire extinguishing bomb and the angle of attack during takeoff and landing, reinforcement is carried out between the fuselage frames. To balance the lateral bending moment generated by the weight of the belly-mounted load during normal flight, the inertial moment along the flight direction, and the lateral bending moment generated during turns, the following force transmission design is implemented: sufficiently large front and rear supports 1 are installed on the frame of the fuselage pylon 8. The front and rear supports 1 are connected to the upper and lower edge strips of the frame at the same time to transfer the lateral bending moment to the belly floor of the frame; the base of the fixed pylon 8 is connected to the front and rear supports 1 through the front and rear corner boxes to balance the gravitational moment generated by the weight of the fire extinguishing bomb on the frame.

[0052] like Figure 6 As shown,

[0053] Based on the dimensions of the fire extinguishing bombs and the spacing between the pylons, additional pylon mounting positions are added to the fuselage. The two mounting positions are symmetrical about the aircraft's axis of symmetry between the stringers. Each mounting position has two mounting points on the fuselage, located between frames 8 and 9. The fuselage structural load consists of aft and aft supports 1, aft and aft corner boxes, and a base. The aft and aft supports and the aft and aft corner boxes are riveted to the upper and lower edge strips and the belly plate of frames 8 and 9 under the floor, and are connected to the base in the middle.

[0054] To ensure the downward deflection angle of the aircraft flaps, fire extinguishing bombs are mounted on the fore and aft of the front spars of ribs 5 and 6 on the lower wing. To balance the bending moment exerted on the wing interface by the loads, in addition to installing fixed joints to reinforce the front support and support beams on the front and aft spars of ribs 5 and 6, front and rear supports are also installed between ribs 4 and 5 and between the front and aft spars of ribs 6 and 7 on the lower wing. The supports on the front and aft spars are connected as a whole by the front and aft crossbeams. The supports between ribs 4 and 5 and on the front and aft spars of ribs 6 and 7 are supported by struts to balance the bending moment exerted on the supports on the front and aft spars by the weight of the wing loads.

[0055] The reinforcement structure consists of front beam reinforcement, rear beam reinforcement, support rods, connecting beams, front mounting base, mounting base, and load-bearing structure.

[0056] The principle of this embodiment is basically the same as that of Embodiment 2, so it will not be described again.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aircraft fire extinguishing bomb mounting platform, mounted on a pylon (8) under the fuselage of an aircraft, the pylon (8) having a grid-like frame structure, the pylon (8) including a front beam, a rear beam, and several connecting ribs disposed between the front beam and the rear beam; characterized in that, It includes two front supports spaced apart on the front beam, two rear supports spaced apart on the rear beam, front corner boxes respectively provided on the front supports, and rear corner boxes respectively provided on the rear supports; The front corner box and the rear corner box are arranged opposite to each other; The front and rear corner boxes are fixedly connected by a base to balance the gravitational moment generated by the weight of the fire extinguishing bomb on the front and rear beams; each front corner box is fixedly connected to the corresponding rear corner box by a base, forming two sets of symmetrical connection structures, with the two bases symmetrical about the axis of symmetry of the aircraft fuselage. Two fire extinguishing bombs are located under the fuselage, and the other two fire extinguishing bombs are located under the left and right wings respectively. The pylon (8) is provided with a fuselage underbelly reinforcement structure to balance the lateral bending moment generated by the fire extinguishing bombs mounted on the fuselage underbelly during normal flight due to their own weight, the inertial moment along the flight direction during flight, and the turning.

2. The aircraft fire extinguishing bomb mounting platform according to claim 1, characterized in that: The fuselage belly reinforcement structure includes longitudinal reinforcement structures respectively provided on the front beam and the rear beam, transverse reinforcement structures provided between the longitudinal reinforcement structures, and end transverse reinforcements respectively provided between the two ends of the longitudinal reinforcement structures.

3. The aircraft fire extinguishing bomb mounting platform according to claim 2, characterized in that: The longitudinal reinforcement structure includes a reinforcement support (1) fixedly connected to the front beam and a crossbeam (2) fixedly connected to the reinforcement support. There are two reinforcement supports (1), which are respectively located at both ends of the crossbeam (2).

4. The aircraft fire extinguishing bomb mounting platform according to claim 3, characterized in that: The transverse reinforcement structure includes a mounting joint (21) and a connecting beam (7); the mounting joint (21) is fixedly connected to the middle of the crossbeam (2); there are two mounting joints (21), and the connecting beam (7) is installed between the two mounting joints (21).

5. The aircraft fire extinguishing bomb mounting platform according to claim 4, characterized in that: The end transverse reinforcement includes four support rods (3), with each pair of support rods (3) forming a group. One end of the support rod (3) is fixedly connected to one end of the crossbeam (2) on the front beam; the other end of the support rod (3) is fixedly connected to the other end of the crossbeam (2); and a group of support rods (3) is provided at each end of the crossbeam (2).

6. The aircraft fire extinguishing bomb mounting platform according to claim 4, characterized in that: The connecting beam (7) is provided with reinforcing beams (71) at both ends.

7. The aircraft fire extinguishing bomb mounting platform according to claim 4, characterized in that, The connecting beam (7) is a channel steel structure, and the channel steel is provided with reinforcing ribs inside the channel.

8. The aircraft fire extinguishing bomb mounting platform according to claim 4, characterized in that: The connecting beam (7) is provided with a rear connector (11) in the middle; a front connector (51) is provided at one end of the connecting beam (7); both the front connector (51) and the rear connector (11) are provided with fire extinguishing bombs.

9. The aircraft fire extinguishing bomb mounting platform according to claim 8, characterized in that: The connecting beam (7) on the rear beam is provided with a front connecting seat (6) at one end; the connecting beam (7) on the front beam is provided with a rear connecting seat (61) at one end; the surfaces of the front connecting seat (6) and the rear connecting seat (61) are fixed with skin (5).

10. The aircraft fire extinguishing bomb mounting platform according to claim 9, characterized in that: The mounting connector (21) includes an upper connector that is fixedly connected to the base plate of the fuselage and a lower connector that is fixedly connected to the connecting beam (7).

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