Load composite loading device for undercarriage turning test

Abstract

The utility model discloses a load composite loading device for an undercarriage turning test, which comprises a force bearing support, a swivel bearing is arranged on the force bearing support, the outer ring of the swivel bearing is fixedly connected with a lateral loading module, a course loading module is arranged on the lateral loading module in a sliding manner, and the course loading module is connected with the course loading module. An airplane wheel axle support is installed on the course loading module in a sliding mode, an inner ring of the rotating bearing is connected with a ground reverse torque loading module, and the loading direction of the lateral loading module and the loading direction of the course loading module are in an orthogonal state. According to the utility model, lateral loading, course loading and ground reverse moment loading can be realized.

Description

Technical Field

[0001] The utility model relates to a turning test of an aircraft landing gear, in particular to a load composite loading device for the turning test of the landing gear. Background Art

[0002] For any aircraft model put on the market, the landing gear turning test is an essential test content, which is mainly used to evaluate the durability of the turning mechanism and the sealing performance of the circumferential motion of the sealing device. With the increasingly stringent test requirements of the main engine, most of the current landing gear turning tests need to simulate the real state more, that is, it is necessary to apply a certain load to its heading and lateral direction on the basis of applying the ground reverse torque, which puts higher requirements on the turning test, so it is necessary to design a set of load compound loading device to solve this problem. Utility Model Content

[0003] The purpose of the utility model is to provide a load compound loading device for landing gear turning test by studying the turning loading characteristics of different landing gear products, so as to apply compound loading of heading, lateral and ground reverse torque at the landing gear axle to different types of landing gear in a simple and convenient way, so as to truly simulate the loading state of the landing gear.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A load composite loading device for a landing gear turning test comprises a load-bearing bracket, a rotating bearing is installed on the load-bearing bracket, the outer ring of the rotating bearing is fixedly connected to a lateral loading module, a heading loading module is slidably installed on the lateral loading module, a wheel axle support is slidably installed on the heading loading module, the inner ring of the rotating bearing is connected to a ground reverse moment loading module, and the loading direction of the lateral loading module is orthogonal to the loading direction of the heading loading module.

[0006] The utility model can simulate the real loading state of the landing gear by arranging a lateral loading module, a heading loading module and a ground reverse moment loading module, and the loading direction of the lateral loading module is orthogonal to the loading direction of the heading loading module, so as to effectively realize the composite loading of the heading, lateral and ground reverse moments at the landing gear axle.

[0007] Preferably, the side loading module includes a side loading cylinder, a first load sensor, a first adapter, a side adapter plate, and a first guide rail. The side loading cylinder and the first guide rail are installed on the side adapter plate. The side adapter plate and the first guide rail form a side loading platform. The side loading cylinder is connected to the first adapter via the first load sensor, and the first adapter is connected to the wheel axle support.

[0008] Preferably, the heading loading module includes a heading loading cylinder, a second load sensor, a second adapter, and a heading adapter plate, the heading loading cylinder and the second guide rail are installed on the heading adapter plate, the heading adapter plate and the second guide rail form a heading loading platform, the heading loading cylinder is connected to the second adapter via the second load sensor, and the second adapter is connected to the wheel axle support.

[0009] Preferably, the heading loading platform is slidably mounted on the first guide rail, and the wheel axle support is slidably mounted on the second guide rail.

[0010] Preferably, the ground reverse torque loading module comprises a torque sensor and a spiral swing cylinder, and the inner ring of the rotary bearing is connected to the spiral swing cylinder via the torque sensor.

[0011] Preferably, the torque sensor and the spiral swing cylinder are respectively mounted on the load-bearing bracket.

[0012] Preferably, an angle pointer is installed on the wheel axle support, a dial is provided on the load-bearing bracket, and the angle pointer points to the dial.

[0013] Preferably, the load composite loading device for landing gear turning test also includes a test jig, the landing gear main rotating shaft and the landing gear strut of the landing gear are connected to the test jig, and the landing gear wheel axle of the landing gear is installed on the wheel axle support.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. During the turning test, the utility model can realize the combined loading of the heading and lateral directions on the landing gear axle without affecting the application of the reverse moment of the landing gear on the ground, can truly simulate the working conditions of the landing gear under load, and simply and effectively achieve its verification purpose; and for landing gears of different specifications and different loads, fast adaptation can be achieved by adopting different wheel axle supports, with high versatility, convenient implementation and wide adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 : Schematic diagram of conventional landing gear structure.

[0018] Figure 2: A front view structural schematic diagram of an embodiment of a load composite loading device for landing gear turning test of the utility model.

[0019] Figure 3 : A side structural schematic diagram of an embodiment of a load composite loading device for landing gear turning test of the utility model.

[0020] Figure 4 : A schematic top view of the structure of an embodiment of a load compound loading device for landing gear turning test of the utility model.

[0021] Figure 5 : Axonometric structure diagram of an embodiment of the load compound loading device for landing gear turning test of the utility model Figure 1 .

[0022] Figure 6 : Axonometric structure diagram of an embodiment of the load compound loading device for landing gear turning test of the utility model Figure 2 .

[0023] Figure 7 : Schematic diagram of the front view structure of the side loading module.

[0024] Figure 8 : Side view structural diagram of the side loading module.

[0025] Fig. 9 : Schematic diagram of the structure of the lateral fine-tuning platform.

[0026] Fig.10 : Schematic diagram of the front view structure of the heading loading module.

[0027] Fig.11 : Side view structural diagram of the heading loading module.

[0028] Fig.12 : Schematic diagram of the structure of the heading fine-tuning platform.

[0029] Fig.13 : A schematic diagram of the overall connection of an embodiment of a load composite loading device for a landing gear turning test of the utility model in a turning test. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Reference Figure 1 Schematic diagram of the conventional landing gear structure. The landing gear main rotating shaft A1 and the landing gear strut A2 are connected to the landing gear outer tube A3 as a whole. One end of the rotating mechanism A4 is fixedly connected to the landing gear outer tube A3, and the other end is connected to the anti-torsion arm A5 through a gear. The anti-torsion arm A5 is connected to the wheel axle A6. When the landing gear A is conducting a turning test, the landing gear main rotating shaft A1 and the landing gear strut A2 are fixedly connected to the test frame B through a support and a pin shaft. When the rotating mechanism A4 supplies hydraulic pressure, the gears in the mechanism drive the anti-torsion arm A5 and the wheel axle A6 to rotate to achieve turning.

[0034] like Figure 2 - Figure 6 As shown, an embodiment of the load compound loading device for landing gear turning test of the present invention comprises a lateral loading module 1, a heading loading module 3 and a ground reverse moment loading module.

[0035] like Figure 7 , Figure 8 , Fig. 9 As shown, the lateral loading module 1 includes a lateral loading cylinder 11, a first load sensor 12, a first adapter 13, a lateral adapter plate 14, and a first guide rail 15. The lateral loading cylinder 11 is connected to the lateral adapter plate 14 via a flange. The lateral loading cylinder 11 is connected to the first load sensor 12 via a flange and then fixedly connected to the first adapter 13. When in use, the first guide rail 15 and the lateral adapter plate 14 are connected via bolts to form a lateral fine-tuning platform. The first adapter 13 is connected to the wheel axle support 5 to achieve lateral load application.

[0036] like Fig.10 , Fig.11 , Fig.12 As shown, the heading loading module 3 includes a heading loading cylinder 31, a second load sensor 32, a second adapter 33, a heading adapter plate 34, and a second guide rail 35. The heading loading cylinder 31 is connected to the heading adapter plate 34 through a flange. The heading loading cylinder 31 and the second load sensor 32 are connected through a flange and then fixedly connected to the second adapter 33. When in use, the second guide rail 35 and the heading adapter plate 34 are connected by bolts to form a heading fine-tuning platform. The second adapter 33 is connected to the wheel axle support 5 to realize the application of the heading load.

[0037] like Figure 2 - Figure 6 As shown, the ground reverse torque loading module includes a torque sensor 10 and a spiral swing cylinder 11 , and the torque sensor 10 is installed on the piston rod of the spiral swing cylinder 11 .

[0038] The load composite loading device for landing gear turning test of the utility model also includes a load-bearing bracket 9, a rotating bearing 8 installed on the load-bearing bracket 9, a lateral adapter plate 14 of the lateral loading module 1 is connected to the upper adapter plate 2 by bolts, the upper adapter plate 2 is fixedly connected to the lower adapter plate 4, the lower adapter plate 4 is fixedly connected to the outer ring of the rotating bearing 8 by bolts, the inner ring of the rotating bearing 8 is connected to the torque sensor 10 and then connected to the spiral swing cylinder 11 by flange, which is used to apply the ground reverse moment, and the load-bearing bracket 9 is bolted to the outer ring of the rotating bearing 8 to bear the axial load. The wheel axle support 5 is slidably installed on the second guide rail 35 on the heading loading platform through the adapter plate 6, and the lateral loading module 1 is slidably connected to the heading loading platform through the first guide rail 15, and the second guide rail 35 is arranged orthogonally to the first guide rail 15, so that the lateral loading module 1 and the heading loading module 3 are combined together, and the lateral and heading loads can be applied at the same time. The angle pointer 7 is bolted to the wheel axle support 5 for indicating the rotation angle of the landing gear wheel axle A6, and a scale plate is arranged on the load-bearing bracket 9, and the angle pointer 7 points to the scale plate.

[0039] like Figure 1 and Fig.13 As shown, when the load composite loading device C for landing gear turning test of the present invention is used in the turning test, the landing gear A is connected to the test frame B through the landing gear main rotating shaft A1 and the landing gear strut A2, and the wheel axle support 5 is used to fix the landing gear wheel axle A6. The load composite loading device C for landing gear turning test of the present invention is installed on the test frame B to realize the composite loading of the heading, lateral and ground reverse moment at the landing gear wheel axle A6: combined with Figure 2 As shown, when the landing gear A rotates, the rotational torque transmitted to the landing gear wheel axle A6 is transmitted to the spiral swing cylinder 11 through the wheel axle support 5 and other mechanisms, and the spiral swing cylinder 11 provides a load; combined with Fig.10As shown, the application of the heading load is connected to the wheel axle support 5 as a whole through the second adapter 33. When the heading loading cylinder 31 is supplied with oil, the two are connected and the wheel axle support 5 is connected with the landing gear wheel axle A6 to achieve the application of the heading load; combined with Figure 7 As shown, the first adapter 13 is connected to the wheel axle support 5 as a whole. When oil is supplied to the lateral loading cylinder 11, the lateral load is applied because the two are connected and the wheel axle support 5 is matched with the landing gear wheel axle A6.

[0040] The above is only a specific implementation scheme of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the field can make many possible changes and modifications to the technical scheme of the utility model by using the technical content disclosed above without departing from the scope of the technical scheme of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical scheme of the utility model shall fall within the protection scope of the technical scheme of the utility model.

Claims

1. A load compound loading device for landing gear turning test, comprising a load-bearing bracket, characterized in that: A rotating bearing is installed on the load-bearing bracket, the outer ring of the rotating bearing is fixedly connected to the lateral loading module, the heading loading module is slidably installed on the lateral loading module, the wheel axle support is slidably installed on the heading loading module, the inner ring of the rotating bearing is connected to the ground reverse torque loading module, and the loading direction of the lateral loading module is orthogonal to the loading direction of the heading loading module.

2. The load compound loading device for landing gear turning test according to claim 1, characterized in that: The side loading module includes a side loading cylinder, a first load sensor, a first adapter, a side adapter plate, and a first guide rail. The side loading cylinder and the first guide rail are installed on the side adapter plate. The side adapter plate and the first guide rail form a side loading platform. The side loading cylinder is connected to the first adapter via the first load sensor, and the first adapter is connected to the wheel axle support.

3. The load compound loading device for landing gear turning test according to claim 2, characterized in that: The heading loading module includes a heading loading cylinder, a second load sensor, a second adapter, and a heading adapter plate. The heading loading cylinder and the second guide rail are installed on the heading adapter plate. The heading adapter plate and the second guide rail form a heading loading platform. The heading loading cylinder is connected to the second adapter via the second load sensor, and the second adapter is connected to the wheel axle support.

4. The load compound loading device for landing gear turning test according to claim 3, characterized in that: The heading loading platform is slidably mounted on the first guide rail, and the wheel axle support is slidably mounted on the second guide rail.

5. The load compound loading device for landing gear turning test according to claim 1, characterized in that: The ground reverse torque loading module comprises a torque sensor and a spiral swing cylinder, and the inner ring of the rotary bearing is connected to the spiral swing cylinder via the torque sensor.

6. The load compound loading device for landing gear turning test according to claim 5, characterized in that: The torque sensor and the spiral swing cylinder are respectively mounted on the load-bearing bracket.

7. The load compound loading device for landing gear turning test according to claim 1, characterized in that: An angle pointer is installed on the wheel axle support, a dial is arranged on the load-bearing bracket, and the angle pointer points to the dial.

8. The load compound loading device for landing gear turning test according to claim 1, characterized in that: It also includes a test jig, a landing gear main rotary shaft and a landing gear strut of the landing gear are connected to the test jig, and a landing gear wheel axle of the landing gear is installed on the wheel axle support.

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