Aircraft speed brake collision buffer device and buffer method thereof

Abstract

The present invention relates to the field of aircraft structure design, and specifically to an aircraft speed brake collision buffer device and a buffer method thereof, wherein the buffer device comprises a buffer pad and a bow-shaped member which are arranged between the aircraft speed brake and the aircraft fixed structure and can both be elastically deformed under load; the upper surface of the buffer pad is attached to the lower surface of the aircraft fixed structure; the two ends of the bow-shaped member are fixed on the upper surface of the aircraft speed brake, and the middle part of the bow-shaped member is arched upward and fixedly connected to the lower surface of the buffer pad through a plurality of fixing devices. The present invention has a simple structure and is easy to install. The buffer pad and the bow-shaped member work together to effectively buffer the collision between the two aircraft speed brakes and reduce the collision energy between the two. It effectively solves the problem of structural damage caused by rigid collision with the aircraft fixed structure or another aircraft speed brake due to the action of aerodynamic force and the retraction mechanism during the retraction or symmetrical movement of the aircraft speed brake.

Description

Technical Field

[0001] The invention relates to the field of aircraft structure design, and in particular to an aircraft speed reducer collision buffer device and a buffer method thereof. Background Art

[0002] Aircraft speed brakes are controllable control surfaces used to increase drag on aircraft, and different aircraft speed brakes are designed according to the specific characteristics of the aircraft. Aircraft speed brakes are usually designed to move around a fixed axis, and the driving rocker arm is close to the axis of rotation. The trailing edge of the aircraft speed brake is in a cantilever beam state relative to the rocker arm and the axis. Under the action of aerodynamic loads during flight, the trailing edge of the aircraft speed brake deforms to produce an "over-retracted state", which causes excessive interference with the aircraft's fixed structure (or another aircraft speed brake that moves symmetrically with it) compared to the static theoretical design state. At the same time, there are special requirements for the retraction and release time of the aircraft speed brake, which will cause the aircraft speed brake to collide with the fixed structure (or another aircraft speed brake that moves symmetrically with it) when it is in the retracted position. The strong collision energy will damage the structure or shorten the fatigue life of the structure. Summary of the invention

[0003] In view of the above problems, the object of the present invention is to provide an aircraft speed brake collision buffer device installed between a speed brake and a fixed structure or between two symmetrically moving aircraft speed brakes and a buffering method thereof.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A collision buffer device for an aircraft speed brake comprises a buffer pad and a bow-shaped member which are arranged between the aircraft speed brake and the aircraft fixed structure and can both be elastically deformed under load; the upper surface of the buffer pad is fitted on the lower surface of the aircraft fixed structure; the two ends of the bow-shaped member are fixed on the upper surface of the aircraft speed brake, and the middle part of the bow-shaped member is arched upward and fixedly connected to the lower surface of the buffer pad through multiple fixing devices.

[0006] Furthermore, the fixing device specifically adopts the following structure, but is not limited to the following structure, the fixing device is composed of a bolt, a support plate nut, and a rivet; the support plate outside the support plate nut is riveted to the lower surface of the middle part of the bow by a plurality of rivets; the threaded end of the bolt passes downward through the buffer pad and the bow in turn and is threadedly connected to the support plate nut, and the head end of the bolt presses the buffer pad against the upper surface of the middle part of the bow.

[0007] Furthermore, the upper surface of the bolt head is a plane or arc-shaped convex surface that is lower than the upper surface of the buffer pad and does not contact the aircraft fixed structure under load. Such structural limitation can avoid collision and contact between the bolt head and the aircraft fixed structure.

[0008] Furthermore, the lower end of the support plate nut and the lower end of the bolt do not contact the upper surface of the aircraft speed bump under load. The deformation amplitude of the bow-shaped member is limited, and when the bow-shaped member is deformed to the maximum, it is limited to ensure that the lower end of the support plate nut and the lower end of the bolt do not contact the upper surface of the aircraft speed bump, so as to avoid the lower end of the support plate nut and the lower end of the bolt from colliding with the aircraft speed bump.

[0009] Furthermore, both ends of the bow-shaped member are riveted to the aircraft speed reducer by a plurality of rivets.

[0010] Furthermore, the buffer pad is an elastic pad, such as an elastic rubber plate.

[0011] Furthermore, the bow-shaped member is a bow-shaped metal spring sheet.

[0012] Furthermore, the cushions and bows may be replaced when their effectiveness decreases unacceptably, depending on usage.

[0013] The present invention has a simple structure and is easy to install. The buffer pad and the bow-shaped member work together to effectively buffer the collision between the two aircraft speed brakes and reduce the collision energy between the two. This effectively solves the problem of structural damage caused by rigid collision with the aircraft fixed structure or another aircraft speed brake due to the aerodynamic force and the retraction mechanism during the retraction or symmetrical movement of the aircraft speed brake.

[0014] A buffering method for an aircraft speed brake collision buffer device, comprising the following steps:

[0015] S1. During the retraction process of the aircraft speed brake, under the action of the retraction mechanism and aerodynamic force, the rear edge of the aircraft speed brake is deformed to produce an "over-retraction state". The aircraft speed brake pushes the buffer pad to collide with the aircraft fixed structure first, causing compression deformation to absorb and dissipate energy;

[0016] S2. After the buffer pad is compressed to the bottom, the bow-shaped member is pushed by the aircraft speed brake to produce elastic deformation to store energy, thereby achieving further buffering. The buffer pad and the bow-shaped member work together to buffer the collision between the aircraft speed brake and the aircraft fixed structure, thereby reducing the collision energy between the two.

[0017] S3. After the aircraft retraction mechanism reaches the retraction position, the retraction mechanism stops functioning, the bow-shaped member releases energy and rebounds, eliminating the gap between the aircraft speed brake and the aircraft fixed structure, making the aircraft speed brake fit tightly with the aircraft fixed structure, improving the aircraft speed brake support stiffness, and suppressing the aircraft speed brake vibration.

[0018] In addition, in another structure of the present invention, the aircraft speed brake collision buffer device includes a buffer pad and a bow-shaped member which are arranged between two symmetrically moving aircraft speed brakes and can undergo elastic deformation under the action of load; the upper surface of the buffer pad is attached to the lower surface of one of the aircraft speed brakes; the two ends of the bow-shaped member are fixed to the upper surface of the other aircraft speed brake, and the middle part of the bow-shaped member is arched upward and fixedly connected to the lower surface of the buffer pad through multiple fixing devices.

[0019] Another buffering method of an aircraft speed brake collision buffer device comprises the following steps:

[0020] S1. When two symmetrically moving aircraft speed brakes gradually approach each other, under the force of the aircraft speed brakes, the buffer pad first collides with the aircraft speed brake closest to it, and is compressed and deformed to absorb and dissipate energy;

[0021] S2. After the buffer pad is compressed to the bottom, the bow-shaped member generates elastic deformation to store energy, thereby achieving further buffering. The buffer pad and the bow-shaped member work together to buffer the collision between the airbrakes of the two aircrafts, thereby reducing the collision energy of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described in detail below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic structural diagram of an aircraft speed brake collision buffer device of the present invention;

[0024] Figure 2 This is a schematic structural diagram of a first embodiment of an aircraft speed brake collision buffer device of the present invention;

[0025] Figure 3 This is a schematic diagram of an installation structure of a second embodiment of an aircraft speed brake collision buffer device of the present invention;

[0026] As shown in the figure: 1-buffer pad, 2-bow part, 3-bolt, 4-support plate nut, 5-rivet one, 6-speed brake, 7-aircraft fixing structure, 8-rivet two. DETAILED DESCRIPTION

[0027] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0028] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Embodiment 1:

[0031] like Figure 1 , Figure 2 The present invention shows an aircraft speed brake collision buffer device, comprising a buffer pad 1 and a bow-shaped member 2, which are arranged between the aircraft speed brake 6 and the aircraft fixed structure 7 and can both be elastically deformed under load; the upper surface of the buffer pad 1 is attached to the lower surface of the aircraft fixed structure 7; the two ends of the bow-shaped member 2 are fixed on the upper surface of the aircraft speed brake 6, and the middle part of the bow-shaped member 2 is arched upward and fixedly connected to the lower surface of the buffer pad 1 through multiple fixing devices. The fixing device is composed of a bolt 3, a support plate nut 4, and a rivet 5; the support plate outside the support plate nut 4 is riveted to the lower surface of the middle part of the bow-shaped member 2 through multiple rivets 5; the threaded end of the bolt 3 passes through the buffer pad 1 and the bow-shaped member 2 in turn downward and is threadedly connected in the support plate nut 4, and the head end of the bolt 3 presses the buffer pad 1 on the upper surface of the middle part of the bow-shaped member 2. The upper surface of the head end of the bolt 3 is a plane or arc-shaped convex surface that is lower than the upper surface of the buffer pad 1 and does not contact the aircraft fixed structure 7 under load. Such a structural limitation can avoid the collision contact between the head end of the bolt 3 and the aircraft fixed structure 7. The buffer pad 1 is an elastic pad, such as an elastic rubber plate. The bow-shaped member 2 is a bow-shaped metal spring sheet. The buffer pad 1 and the bow-shaped member 2 can be replaced with new ones when their performance is unacceptably reduced according to the usage.

[0032] like Figure 1 , Figure 2As shown, the lower end of the support plate nut 4 and the lower end of the bolt 3 do not contact the upper surface of the aircraft speed brake 6 under the action of load. The deformation amplitude of the bow 2 is limited, and when the bow 2 is deformed to the maximum, it is limited to ensure that the lower end of the support plate nut 4 and the lower end of the bolt 3 do not contact the upper surface of the aircraft speed brake 6, so as to avoid the lower end of the support plate nut 4 and the lower end of the bolt 3 from colliding with the aircraft speed brake 6. The two ends of the bow 2 are riveted to the aircraft speed brake 6 by a plurality of rivets 8.

[0033] When the aircraft is flying, during the process of retracting the aircraft speed brake 6, the rear edge of the aircraft speed brake 6 is deformed under the action of the retracting mechanism and aerodynamic force to produce an "over-retracted state". Under the force of the aircraft speed brake 6, the buffer pad 1 first collides with the aircraft fixed structure 7, undergoes compression deformation to absorb and dissipate energy. Further, after the buffer pad 1 is compressed to the bottom, the bow 2 produces elastic deformation to store energy. In this process, the buffer pad 1 and the bow 2 work together to buffer the collision between the aircraft speed brake 6 and the aircraft fixed structure 7, reducing the collision energy between the two. After the aircraft retracting mechanism reaches the retracted position, the retracting mechanism stops working, and the bow 2 releases energy and rebounds (pushing the rear edge of the aircraft speed brake 6 to slightly deflect downward), eliminating the gap between the aircraft speed brake 6 and the aircraft fixed structure 7, making the aircraft speed brake 6 fit more closely with the aircraft fixed structure 7, improving the support stiffness of the aircraft speed brake 6, and suppressing the vibration of the aircraft speed brake 6.

[0034] Embodiment 2:

[0035] The difference between this embodiment and the first embodiment is that:

[0036] like Figure 1 , Figure 3 As shown, the aircraft speed brake collision buffer device includes a buffer pad 1 and a bow member 2 which are arranged between two symmetrically moving aircraft speed brakes 6 and can undergo elastic deformation under the action of load; the upper surface of the buffer pad 1 is attached to the lower surface of one of the aircraft speed brakes 6; the two ends of the bow member 2 are fixed to the upper surface of the other aircraft speed brake 6, and the middle part of the bow member 2 is arched upward and fixedly connected to the lower surface of the buffer pad 1 through multiple fixing devices.

[0037] When the aircraft is flying, in the process of two symmetrically moving aircraft speed brakes 6 approaching each other, under the action of the aircraft speed brakes 6 (pushing), the buffer pad 1 first collides with the aircraft speed brake 6 closest to it, and undergoes compression deformation to absorb and dissipate energy; after the buffer pad 1 is compressed to the bottom, the bow 2 undergoes elastic deformation to store energy, thereby achieving further buffering. During the whole process, the buffer pad 1 and the bow 2 work together to buffer the collision between the two aircraft speed brakes 6 and reduce the collision energy between the two.

[0038] It should be noted that the terms "comprises", "includes" or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0039] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. An aircraft speed brake collision buffer device, characterized in that : comprising a buffer pad (1) and a bow-shaped member (2) which are arranged between an aircraft speed brake (6) and an aircraft fixed structure (7) and can both undergo elastic deformation under the action of a load; the upper surface of the buffer pad (1) is attached to the lower surface of the aircraft fixed structure (7); the two ends of the bow-shaped member (2) are fixed to the upper surface of the aircraft speed brake (6), and the middle part of the bow-shaped member (2) is arched upward and fixedly connected to the lower surface of the buffer pad (1) through a plurality of fixing devices; The buffering steps of utilizing the above-mentioned aircraft speed brake collision buffer device are as follows: S1. During the retraction process of the aircraft speed brake, under the action of the retraction mechanism and aerodynamic force, the rear edge of the aircraft speed brake is deformed to produce an "over-retraction state". The aircraft speed brake pushes the buffer pad to collide with the aircraft fixed structure first, causing compression deformation to absorb and dissipate energy; S2. After the buffer pad is compressed to the bottom, the bow-shaped member is pushed by the aircraft speed brake to produce elastic deformation to store energy, thereby achieving further buffering. The buffer pad and the bow-shaped member work together to buffer the collision between the aircraft speed brake and the aircraft fixed structure, thereby reducing the collision energy between the two. S3. After the aircraft retraction mechanism reaches the retraction position, the retraction mechanism stops functioning, the bow-shaped member releases energy and rebounds, eliminating the gap between the aircraft speed brake and the aircraft fixed structure, making the aircraft speed brake fit tightly with the aircraft fixed structure, improving the aircraft speed brake support stiffness, and suppressing the aircraft speed brake vibration.

2. The aircraft speed brake collision buffer device according to claim 1, characterized in that The fixing device is composed of a bolt (3), a support plate nut (4), and a rivet (5); the support plate outside the support plate nut (4) is riveted to the lower surface of the middle part of the bow-shaped member (2) by a plurality of rivets (5); the threaded end of the bolt (3) passes downward through the buffer pad (1) and the bow-shaped member (2) in sequence and is then threadedly connected in the support plate nut (4), and the head end of the bolt (3) presses the buffer pad (1) against the upper surface of the middle part of the bow-shaped member (2).

3. The aircraft speed brake collision buffer device according to claim 2, characterized in that The upper surface of the head end of the bolt (3) is a plane or arc-shaped convex surface that is lower than the upper surface of the buffer pad (1) and does not contact the aircraft fixed structure (7) under the action of load.

4. The aircraft speed brake collision buffer device according to claim 3, characterized in that The lower end of the support plate nut (4) and the lower end of the bolt (3) do not contact the upper surface of the aircraft speed brake (6) under the action of load.

5. The aircraft speed brake collision buffer device according to claim 1, characterized in that The two ends of the bow-shaped member (2) are riveted to the aircraft speed reducer (6) via a plurality of rivets (8).

6. An aircraft speed brake collision buffer device according to any one of claims 1 to 5, characterized in that The buffer pad (1) is an elastic pad.

7. An aircraft speed brake collision buffer device according to any one of claims 1 to 5, characterized in that The bow-shaped member (2) is a bow-shaped metal spring sheet.

8. An aircraft speed brake collision buffer device, characterized in that : comprising a buffer pad (1) and a bow-shaped member (2) which are arranged between two symmetrically moving aircraft speed brakes (6) and can both undergo elastic deformation under the action of a load; the upper surface of the buffer pad (1) is attached to the lower surface of one of the aircraft speed brakes (6); the two ends of the bow-shaped member (2) are fixed to the upper surface of the other aircraft speed brake (6), and the middle part of the bow-shaped member (2) is arched upward and fixedly connected to the lower surface of the buffer pad (1) through a plurality of fixing devices; The buffering steps of utilizing the above-mentioned aircraft speed brake collision buffer device are as follows: S1. When two symmetrically moving aircraft speed brakes gradually approach each other, under the force of the aircraft speed brakes, the buffer pad first collides with the aircraft speed brake closest to it, and is compressed and deformed to absorb and dissipate energy; S2. After the buffer pad is compressed to the bottom, the bow-shaped member generates elastic deformation to store energy, thereby achieving further buffering. The buffer pad and the bow-shaped member work together to buffer the collision between the airbrakes of the two aircrafts, thereby reducing the collision energy of the two.

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