Adjustable speed reducer

Abstract

The invention belongs to the technical field of aircrafts, and particularly relates to an adjustable speed reducer. The device comprises a grating sleeve, a sliding rail and a grating sleeve joint, wherein the grating sleeve is provided with a sliding rail track and a grating sleeve joint; one end of the grating sleeve actuator is connected with the aircraft, and the other end of the grating sleeve actuator is connected with the grating sleeve joint; the clamping plate is provided with a sliding rail rod and a clamping plate connector, the clamping plate is embedded in the grating sleeve, and the sliding rail rod of the clamping plate is installed in the sliding rail track of the grating sleeve in a sliding mode; one end of the clamping plate actuator is connected with the aircraft, and the other end of the clamping plate actuator is connected with the clamping plate connector. Adjustment of the speed reduction effect can be achieved through movement of the clamping plates, the speed reduction device is easy to open under the high-altitude large Mach number and not prone to deformation after being opened, the folding and unfolding problem of the speed reduction device under the high-altitude high-speed condition can be solved, and through the design of the grating sleeve and the clamping plates, change of the resistance increasing amount can be achieved, the structural weight can be saved, and the design difficulty can be reduced.

Description

Technical Field

[0001] The present application belongs to the field of aircraft technology, and in particular relates to an adjustable deceleration device. Background Art

[0002] The speed brake on an aircraft mainly helps the aircraft to slow down by increasing the flight resistance. In particular, fighter jets need to use the speed brake to reduce their flight speed when performing deceleration movements at high altitudes and approaching for landing. It is an important means of aerodynamic deceleration.

[0003] However, conventional speed brakes are subject to certain limitations during use. Usually, when the speed brake is opened in the direction of the adverse airflow at high altitudes and high Mach numbers, it will be subject to huge aerodynamic loads, which will cause the speed brake to be unable to open or the structure to be easily deformed, damaged, and fail after opening. Therefore, its use at high altitudes is greatly restricted. In addition, the speed brake is usually only set with a fixed deflection angle, which cannot meet the need for different resistance increases at different operating speeds.

[0004] In order to solve the problems of speed brake being difficult to open, structural damage, variable resistance increase, and affecting use during use, thereby avoiding accidents, it has become a technical problem that needs to be urgently solved in this field.

[0005] Therefore, it is desired to have a technical solution to overcome or at least alleviate at least one of the above-mentioned defects of the prior art. Summary of the invention

[0006] The purpose of the present application is to provide an adjustable deceleration device to solve at least one problem existing in the prior art.

[0007] The technical solution of this application is:

[0008] An adjustable deceleration device, comprising:

[0009] A grille sleeve, wherein the grille sleeve is provided with a slide rail and a grille sleeve joint;

[0010] A grid sleeve actuator, one end of which is connected to the aircraft, and the other end of which is connected to the grid sleeve joint;

[0011] A clamping plate, wherein a slide rail rod and a clamping plate joint are arranged on the clamping plate, the clamping plate is nested inside the grille sleeve, and the slide rail rod of the clamping plate is slidably installed in the slide rail track of the grille sleeve;

[0012] A splint actuator, one end of which is connected to the aircraft, and the other end of which is connected to the splint joint.

[0013] In at least one embodiment of the present application, the grille sleeve is in the shape of a cuboid having a receiving cavity and an opening on one side.

[0014] In at least one embodiment of the present application, the grille cover includes a front grille plate, a rear grille plate, an upper sealing plate, a lower sealing plate, a left sealing plate and a right sealing plate.

[0015] In at least one embodiment of the present application, the slide rail track is respectively provided on the upper sealing plate and the lower sealing plate of the grille sleeve.

[0016] In at least one embodiment of the present application, the length of the slide rail track is greater than the length of the grille sleeve.

[0017] In at least one embodiment of the present application, a plurality of the grille sleeve joints are arranged along the height direction of the grille sleeve.

[0018] In at least one embodiment of the present application, the splint is in the shape of a cuboid.

[0019] In at least one embodiment of the present application, the slide rail rod is provided at the top and the bottom of the clamping plate respectively.

[0020] In at least one embodiment of the present application, the length of the slide rail rod is greater than the length of the clamping plate.

[0021] In at least one embodiment of the present application, the clamping plate joint is arranged at a middle position on one side of the clamping plate.

[0022] In at least one embodiment of the present application, a grille sleeve connecting rod is installed on the grille sleeve actuator, and the grille sleeve actuator is hinged to the grille sleeve joint through the grille sleeve connecting rod.

[0023] In at least one embodiment of the present application, a clamping plate connecting rod is installed on the clamping plate actuator, and the clamping plate actuator is hinged to the clamping plate joint through the clamping plate connecting rod.

[0024] In at least one embodiment of the present application, the resistance increment is adjusted by adjusting the overlapping area of ​​the grille sleeve and the clamping plate to change the resistance coefficient.

[0025] The invention has at least the following beneficial technical effects:

[0026] The adjustable deceleration device of the present application can adjust the deceleration effect by moving the clamping plate 2. It is not only simple in structure but also very strong and has no restrictions on use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a grille cover according to an embodiment of the present application;

[0028] Figure 2 is a schematic diagram of a splint according to one embodiment of the present application;

[0029] Figure 3 It is a schematic diagram of the assembly of the grille cover and the clamping plate according to one embodiment of the present application;

[0030] Figure 4 It is a schematic diagram of the working state of an adjustable deceleration device according to one embodiment of the present application.

[0031] in:

[0032] 1-grid sleeve; 2-clamp plate; 3-slide rail; 4-slide rail rod; 5-grid sleeve joint; 6-clamp plate joint; 7-grid sleeve actuator; 8-clamp plate connecting rod; 9-grid sleeve connecting rod; 10-clamp plate actuator. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the embodiment of this application will be described in more detail below in conjunction with the drawings in the embodiment of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of this application, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain this application, and should not be construed as limitations on this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of this application are described in detail below in conjunction with the drawings.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do 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 should not be understood as limiting the scope of protection of the present application.

[0035] The following is combined with Figures 1 to 4 This application is described in further detail.

[0036] The present application provides an adjustable deceleration device, comprising: a grille sleeve 1, a grille sleeve actuator 7, a clamping plate 2 and a clamping plate actuator 10.

[0037] Specifically, Figure 1 As shown, a slide rail 3 and a grille sleeve joint 5 are provided on the grille sleeve 1 , one end of a grille sleeve actuator 7 is connected to the aircraft, and the other end is connected to the grille sleeve joint 5 .

[0038] In this embodiment, the grille cover 1 is a rectangular parallelepiped with a receiving cavity and an opening on one side. The grille cover 1 may include a front grille plate, a rear grille plate, an upper sealing plate, a lower sealing plate, a left sealing plate and a right sealing plate, and the opening is arranged on the left sealing plate. The front and rear grille plates are respectively composed of a horizontal grille and a vertical grille staggered. A slide rail 3 is respectively arranged on the inner side of the upper sealing plate and the lower sealing plate of the grille cover 1, wherein the length of the slide rail 3 is greater than the length of the grille cover 1. A plurality of grille cover joints 5 are arranged on the left sealing plate of the grille cover 1 along the height direction.

[0039] In this embodiment, a grille sleeve connecting rod 9 is installed on the grille sleeve actuator 7 , and the grille sleeve actuator 7 is hinged to the grille sleeve joint 5 through the grille sleeve connecting rod 9 .

[0040] like Figure 2 As shown, a slide rail rod 4 and a splint joint 6 are provided on the splint 2, the splint 2 is nested inside the grille sleeve 1, and the slide rail rod 4 of the splint 2 is slidably installed in the slide rail track 3 of the grille sleeve 1; one end of the splint actuator 10 is connected to the aircraft, and the other end is connected to the splint joint 6.

[0041] In this embodiment, the clamping plate 2 is in a rectangular parallelepiped shape. A slide rail rod 4 is provided at the top and bottom of the clamping plate 2, respectively, wherein the length of the slide rail rod 4 is greater than the length of the clamping plate 2. The clamping plate joint 6 is provided at the middle position of one side of the clamping plate 2.

[0042] In this embodiment, a splint connecting rod 8 is installed on the splint actuator 10 , and the splint actuator 10 is hinged to the splint joint 6 through the splint connecting rod 8 .

[0043] The adjustable deceleration device of the present application, such as Figure 3 As shown, the grille cover 1 and the clamping plate 2 are connected by the cooperation of the slide rail 3 and the track rod 4.

[0044] The adjustable deceleration device of the present application, such as Figure 4 As shown, the control grid cover actuator 7 pushes the grid cover 1 out of the outer surface of the aircraft through the grid cover connecting rod 9, increasing the flight resistance to help the aircraft slow down, and the control clamp actuator 10 drives the clamp connecting rod 8 to pull back or push the clamp 2 to move translationally along the slide track 3 in the grid cover 1, changing the overlapping area between the clamp 2 and the grid cover 1.

[0045] The adjustable deceleration device of the present application has a resistance increment D of:

[0046]

[0047] Among them, ρ is the atmospheric density, v is the air velocity, S is the windward area, C D is the resistance coefficient.

[0048] By adjusting the overlapping area of ​​the grille sleeve 1 and the clamping plate 2, the resistance coefficient C in the formula is changed.D , to achieve the adjustment of the resistance increment.

[0049] Since the resistance increment of conventional speed brakes is fixed, the speed brakes can usually only be used at a certain speed. However, the present application can expand the scope of use of the speed brake by adjusting the overlapping area and thus adjusting the resistance increment, thereby expanding the scope of use.

[0050] Generally, when the air brake is opened, because it is opposite to the direction of the air flow, when the speed pressure is large, there is a situation where the hinge torque is large and the air brake cannot be opened. The advantage of the present application is that when it cannot be opened, the overlapping area of ​​the grille cover 1 and the clamping plate 2 is 0 (i.e., the overlapping area is the minimum state), so as to maintain a certain air flow permeability and reduce the risk of the air brake not being able to open under high speed pressure.

[0051] The adjustable deceleration device of the present application adopts a double-layer grid frame and a pneumatically retractable plate configuration filled in the middle. The overlapping area of ​​the clamping plate 2 and the grid cover 1 can be adjusted to achieve different aircraft resistance increase and deceleration in different states (flight speed, configuration, attitude), and can also adjust the aircraft's yaw attitude and compensate for the rudder function, with strong engineering feasibility.

[0052] The adjustable deceleration device of the present application can adjust the deceleration effect by moving the clamping plate 2. It is easy to open at high altitude and high Mach number, and is not easy to deform after opening, which can improve the problem of retracting and releasing the deceleration device at high altitude and high speed. Through the design of the grid sleeve-clamping plate, the resistance increase can be changed, the structural weight can be saved, and the design difficulty can be reduced.

[0053] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An adjustable deceleration device, characterized in that: include: A grille cover (1), wherein the grille cover (1) is provided with a slide rail (3) and a grille cover joint (5); A grid cover actuator (7), one end of the grid cover actuator (7) is connected to the aircraft, and the other end is connected to the grid cover joint (5); A clamping plate (2), wherein a slide rail rod (4) and a clamping plate joint (6) are arranged on the clamping plate (2), the clamping plate (2) is nested inside the grille sleeve (1), and the slide rail rod (4) of the clamping plate (2) is slidably mounted in the slide rail track (3) of the grille sleeve (1); A splint actuator (10), one end of which is connected to the aircraft, and the other end of which is connected to the splint connector (6).

2. The adjustable deceleration device according to claim 1, characterized in that: The grille sleeve (1) is in the shape of a rectangular parallelepiped with a containing cavity and an opening on one side.

3. The adjustable deceleration device according to claim 2, characterized in that: The grille cover (1) comprises a front grille plate, a rear grille plate, an upper sealing plate, a lower sealing plate, a left sealing plate and a right sealing plate.

4. The adjustable deceleration device according to claim 3, characterized in that: The slide rail track (3) is respectively arranged on the upper sealing plate and the lower sealing plate of the grille sleeve (1).

5. The adjustable deceleration device according to claim 4, characterized in that: The length of the slide rail track (3) is greater than the length of the grille sleeve (1).

6. The adjustable deceleration device according to claim 5, characterized in that: A plurality of the grille sleeve joints (5) are arranged along the height direction of the grille sleeve (1).

7. The adjustable deceleration device according to claim 6, characterized in that: The clamping plate (2) is in the shape of a rectangular parallelepiped.

8. The adjustable deceleration device according to claim 7, characterized in that: The slide rail rod (4) is respectively arranged at the top and the bottom of the clamping plate (2).

9. The adjustable deceleration device according to claim 8, characterized in that: The length of the slide rail rod (4) is greater than the length of the clamping plate (2).

10. The adjustable deceleration device according to claim 9, characterized in that: The clamping plate joint (6) is arranged at a middle position on one side of the clamping plate (2).

11. The adjustable deceleration device according to claim 10, characterized in that: A grille sleeve connecting rod (9) is installed on the grille sleeve actuator (7), and the grille sleeve actuator (7) is hinged to the grille sleeve joint (5) via the grille sleeve connecting rod (9).

12. The adjustable deceleration device according to claim 11, characterized in that: A splint connecting rod (8) is installed on the splint actuator (10), and the splint actuator (10) is hinged to the splint joint (6) via the splint connecting rod (8).

13. The adjustable deceleration device according to claim 12, characterized in that: The resistance coefficient is changed by adjusting the overlapping area of ​​the grille sleeve (1) and the clamping plate (2), thereby achieving regulation of the resistance increment.

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