Small axial limiting hinge device suitable for airfoil flutter test model

Abstract

The invention provides a small-sized axial limiting hinge device suitable for a flutter test model, and the small-sized axial limiting hinge device suitable for the flutter test model comprises two single-combination hinges, and the two single-combination hinges are oppositely installed at the rear edge of an airfoil model; each single-combination hinge comprises a fixed hinge, a bearing, a movable hinge, a limiting rotating shaft and a fixing piece. The fixed hinge comprises a fixed hinge piece and a fixed hinge shaft sleeve, and the movable hinge comprises a movable hinge piece and a movable hinge shaft sleeve. The fixed hinge sheet is fixedly connected to the rear edge of the airfoil model, and the bearing is embedded in the fixed hinge shaft sleeve; the movable blade is fixedly connected to the front edge of the control surface model; the limitable rotating shaft penetrates through the movable hinge shaft sleeve and then is tightly matched with a bearing inner ring embedded in the fixed hinge shaft sleeve; and the limitable rotating shaft is fixed on the movable hinge shaft sleeve by the fixing piece. The technical problem that in the prior art, control surface connection cannot meet the requirements for the size, the weight and the limited installation space can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical structure design, and in particular relates to a small axial limit hinge device suitable for an airfoil flutter test model. Background Art

[0002] Flutter is an aeroelastic instability phenomenon caused by the coupling of elastic structural dynamics and unsteady aerodynamic forces. Because flutter often leads to structural system failure in a very short period of time, all aircraft development requires structural flutter characteristic analysis, optimization, and experimental verification to ensure flight safety. Wind tunnel testing, a key verification tool for aeroelastic design, is used to study structural flutter characteristics, identify flutter boundaries, and verify the accuracy of theoretical methods. However, due to limitations in actual structural size and wind tunnel capacity, flutter wind tunnel testing of scaled models meeting similar requirements is necessary.

[0003] Aircraft typically utilize a wing with a high lift-to-drag ratio as the primary lifting surface, with multiple controllable aerodynamic surfaces typically incorporated into its trailing edge. These control surfaces are typically connected to the wing structure using two sets of rotatable bearing assemblies. These surfaces deflect according to servo commands, changing the aerodynamic force distribution to accurately control the aircraft's attitude. Control surface flutter is a typical and complex problem in aircraft structural flutter. During the planning and development phases, flutter wind tunnel tests are typically planned and conducted on scaled-down models of wing structures with trailing-edge control surfaces. However, existing control surface connections do not meet the requirements for size, weight, and limited installation space. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] The present invention provides a small axial limit hinge device suitable for an airfoil flutter test model, the small axial limit hinge device suitable for an airfoil flutter test model includes two single combination pages, which are installed opposite to each other on the trailing edge of the airfoil model; any single combination page includes: a fixed page, a bearing, a movable page, a limitable rotating shaft and a fixing part; the fixed page includes a fixed page leaf and a fixed page shaft sleeve, and the movable page includes a movable page leaf and a movable page shaft sleeve; the fixed page leaf is fixedly connected to the trailing edge of the airfoil model, and the bearing is embedded in the fixed page shaft sleeve; the movable page leaf is fixedly connected to the leading edge of the control surface model; the limitable rotating shaft passes through the movable page shaft sleeve and is tightly fitted with the inner ring of the bearing embedded in the fixed page shaft sleeve; the fixing part fixes the limitable rotating shaft on the movable page shaft sleeve.

[0006] Furthermore, the limitable rotating shaft has a through hole, and the fixing piece passes through the through hole to fix the limitable rotating shaft on the movable leaf shaft sleeve.

[0007] Furthermore, any single combination page also includes a page connector, the fixed page is fixedly connected to the trailing edge of the airfoil model through the page connector, and the movable page is fixedly connected to the leading edge of the control surface model through the page connector.

[0008] Furthermore, the fixed page sheet and the movable page sheet have through holes, and the sheet connector passes through the through holes to fix the fixed page sheet to the trailing edge of the wing model and to fix the movable page sheet to the leading edge of the control surface model.

[0009] The technical solution of the present invention provides a small axially limited hinge device suitable for airfoil flutter test models. This hinge device installs two opposed single hinges on the trailing edge of the airfoil model, allowing the control surface to rotate freely while effectively limiting rotational axial movement. This hinge device requires minimal installation space and is suitable for installing trailing edge control surface models requiring large scale. Compared to the prior art, the technical solution of the present invention can solve the technical problem that the control surface connection in the prior art cannot meet the requirements of size, weight, and limited installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings are included to provide a further understanding of the embodiments of the present invention, constitute a part of the specification, illustrate the embodiments of the present invention, and together with the description, explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0011] Figure 1 A schematic structural diagram of a small axial limit hinge device suitable for an airfoil flutter test model according to a specific embodiment of the present invention is shown;

[0012] Figure 2 It shows an exploded schematic diagram of a single combination page provided according to a specific embodiment of the present invention;

[0013] Figure 3 A schematic structural diagram of a single combination page provided according to a specific embodiment of the present invention is shown.

[0014] Figure 4 Shown Figure 3 Schematic diagram of the cross section along line AA;

[0015] The above drawings include the following reference numerals:

[0016] 1. Fixed page; 2. Bearing; 3. Movable page; 4. Limitable shaft; 5. Fixing parts. DETAILED DESCRIPTION

[0017] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0020] like Figures 1 to 4 As shown, according to a specific embodiment of the present invention, a small axial limiting hinge device suitable for an airfoil flutter test model is provided, the hinge device includes two single combination pages, and the two single combination pages are installed oppositely on the trailing edge of the airfoil model; any single combination page includes: a fixed page 1, a bearing 2, a movable page 3, a limitable rotating shaft 4 and a fixing part 5; the fixed page 1 includes a fixed page sheet and a fixed page shaft sleeve, and the movable page 3 includes a movable page sheet and a movable page shaft sleeve; the fixed page sheet is fixedly connected to the trailing edge of the airfoil model, and the bearing 2 is embedded in the fixed page shaft sleeve; the movable page sheet is fixedly connected to the leading edge of the control surface model; the limitable rotating shaft 4 passes through the movable page shaft sleeve and is tightly fitted with the inner ring of the bearing embedded in the fixed page shaft sleeve; the fixing part 5 fixes the limitable rotating shaft 4 on the movable page shaft sleeve.

[0021] This configuration provides a small axially limited hinge device suitable for airfoil flutter test models. Two opposed single hinges are mounted on the trailing edge of the airfoil model, allowing the control surface to rotate freely while effectively limiting rotational axial motion. This hinge device requires minimal installation space and is suitable for mounting trailing-edge control surface models requiring large-scale scale.

[0022] As a specific embodiment of the present invention, the limitable rotating shaft 4 can be configured to have a through hole, and the fixing member 5 passes through the through hole to fix the limitable rotating shaft 4 on the movable leaf shaft sleeve.

[0023] Furthermore, in the present invention, in order to achieve a fixed connection between the sheet and the wing model and the control surface model, any single combination sheet can be configured to also include a sheet connector, the fixed sheet is fixedly connected to the trailing edge of the wing model through the sheet connector, and the movable sheet is fixedly connected to the leading edge of the control surface model through the sheet connector.

[0024] As a specific embodiment of the present invention, the fixed page sheet and the movable page sheet can be configured to have through holes. After the page connector passes through the through holes, the fixed page sheet is fixedly connected to the trailing edge of the wing model, and the movable page sheet is fixedly connected to the leading edge of the control surface model.

[0025] As another specific embodiment of the present invention, the fixing member 5 and the sheet connecting member can both be screws or bolts, etc. The above-mentioned setting of the fixing member and the connecting member is only an example, but is not limited thereto.

[0026] The present invention's compact axial limit hinge device, suitable for use in airfoil flutter test models, is suitable for mounting trailing edge control surface models requiring large-scale scale. It enables free rotation of the trailing edge control surface model while effectively limiting axial relative motion. This hinge device can be extended to connect other rotatable components with limited size, weight, and installation space, demonstrating its versatility.

[0027] In order to have a further understanding of the present invention, the small axial limit hinge device applicable to the airfoil flutter test model of the present invention is described in detail below with reference to specific embodiments.

[0028] The original structure is designed according to a scaled model of the low-speed flutter wind tunnel test wing surface according to a size ratio of 3:1. According to the similarity ratio requirement, the mass ratio is required to be 27:1 (the density ratio of the low-speed wind tunnel test is 1). The original control surface is connected to the trailing edge of the wing surface through two rotating mechanisms. The mass of a single rotating mechanism is 1 kg. The total mass of the small axial limit hinge device of this embodiment is 0.04 kg, which meets the model design requirements.

[0029] In addition, in order to ensure that the flow field does not separate, the gap size between the trailing edge of the wing and the front edge of the control surface is required to be small enough, which leads to severe limitation of the axial installation size of the hinge. The small axial limit hinge device of the present invention has a separate design of the fixed leaf, movable leaf, and limitable rotating shaft. The fixed leaf and movable leaf are respectively fixed to the wing and the control surface, and then connected via the limitable rotating shaft. Therefore, the axial installation size of the hinge only needs to meet the length of the limitable rotating shaft.

[0030] The present invention has been successfully applied to a large-scale scaled model of a flutter wind tunnel test on an airfoil with a trailing edge control surface. It can be used to design a scaled model of a flutter wind tunnel test on an airfoil structure with a trailing edge control surface, ensuring that the model meets both strict parameter requirements such as size ratio and mass ratio and the requirements of component functional integrity, thus solving the difficult problem of control surface connection design under strict constraints of size, weight and installation space.

[0031] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A small axial limit hinge device suitable for an airfoil flutter test model, characterized in that: The small axial limit hinge device suitable for an airfoil flutter test model comprises two single combination hinges, which are oppositely mounted on the trailing edge of the airfoil model; any of the single combination hinges comprises: a fixed hinge (1), a bearing (2), a movable hinge (3), a limitable rotating shaft (4) and a fixing member (5); the fixed hinge (1) comprises a fixed hinge sheet and a fixed hinge sleeve, and the movable hinge (3) comprises a movable hinge sheet and a movable hinge sleeve; the fixed hinge sheet is fixedly connected to the trailing edge of the airfoil model, and the bearing (2) is embedded in the fixed hinge sleeve; the movable hinge sheet is fixedly connected to the leading edge of the control surface model; the limitable rotating shaft (4) passes through the movable hinge sleeve and is tightly fitted with the inner ring of the bearing embedded in the fixed hinge sleeve; the fixing member (5) fixes the limitable rotating shaft (4) on the movable hinge sleeve.

2. The small axial limit hinge device suitable for an airfoil flutter test model according to claim 1, characterized in that: The position-limiting rotating shaft (4) has a through hole, and the fixing member (5) passes through the through hole to fix the position-limiting rotating shaft (4) on the movable leaf shaft sleeve.

3. The small axial limit hinge device suitable for an airfoil flutter test model according to claim 1, characterized in that: Any single combination leaf further includes a leaf connecting piece, through which the fixed leaf leaf is fixedly connected to the trailing edge of the airfoil model, and the movable leaf leaf is fixedly connected to the leading edge of the control surface model.

4. The small axial limit hinge device suitable for an airfoil flutter test model according to claim 3, characterized in that: The fixed page sheet and the movable page sheet have through holes. After the page connector passes through the through holes, the fixed page sheet is fixedly connected to the trailing edge of the airfoil model, and the movable page sheet is fixedly connected to the leading edge of the control surface model.

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