Large-deformation aerodynamic load rubber composite tight sealing piece

Abstract

The utility model provides a large-deformation pneumatic load rubber composite tight sealing piece, the cross section of the sealing piece is of a knife-shaped structure, the sealing piece comprises a sealing main body and a mounting handle, the interior of the sealing main body is of a hollow structure to form a compression cavity, and the width of the front portion of the compression cavity is smaller than that of the rear portion of the compression cavity; the sealing main body comprises a sealing back surface, a front end tip part, a working surface and a vertical connecting section which are connected in sequence; the sealing back face is located on the top of the sealing body and extends in an upward arc shape, and the tail end of the sealing back face is gradually thinned to form a sharp front end tip. The front end tip part is positioned at the front end of the sealing main body and is of a wedge-shaped structure; the working face is located on the lower portion of the sealing body and extends upwards in an arc shape. The vertical connecting section is located between the sealing back face and the working face and is of a vertical structure, and the vertical section is horizontally connected with the mounting handle outwards. The dynamic sealing device has the advantages of being excellent in dynamic sealing performance, suitable for large gaps and multi-angle variable cross sections, good in flexible strength balance and the like, and is widely suitable for dynamic sealing requirements under complex working conditions.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of sealing element for airplane, concretely relates to a big deformation aerodynamic load rubber composite seal seal element. BACKGROUND

[0002] In the closing and flight process of the aircraft body, in order to ensure the sealing of the gap and bear the aerodynamic load, the seal plate structure is usually handled. However, the existing seal plate is mainly made of metal structure or fiber resin composite material, and has the characteristics of large rigidity and small deformation. This kind of seal plate is only suitable for small gap hard sealing, and it is difficult to meet the demand of dynamic sealing gap, large angle change range and variable cross section sealing. In addition, the existing metal and composite material seal plate has high manufacturing cost and complex processing technology, which limits the flexibility and economy of its actual application.

[0003] At present, the common sealing forms include metal or composite material sealing plate used in Airbus A319 / A320 / A321 and Boeing 777 aircraft. Although these sealing plates can realize basic sealing function, they are prone to structural damage when deformed under stress due to their large rigidity, and cannot bear the aerodynamic load of large deformation, thereby leading to the decline of sealing performance. In addition, the magnetic seal plate proposed by a domestic design unit solves the sealing demand of specific working conditions to some extent, but its structure is complex and the applicable range is limited.

[0004] In summary, the sealing element in the prior art has great limitations in the application scene of dynamic large deformation and multi-angle variable cross section sealing, and there is an urgent need for an innovative sealing element that can maintain high sealing performance under complex motion conditions. SUMMARY

[0005] The utility model provides a big deformation aerodynamic load rubber composite seal seal element to solve the problem that the rigidity of the existing seal plate is large, the deformation is small, and it cannot adapt to the dynamic large gap and multi-angle variable cross section sealing demand.

[0006] In order to achieve the above purpose, the technical scheme of the utility model is as follows:

[0007] A big deformation aerodynamic load rubber composite seal seal element, characterized in that the sealing element is a strip-shaped structure, and the cross section is a knife-shaped structure;

[0008] The sealing element includes a sealing body and a mounting handle, the inside of the sealing body is a hollow structure forming a compression cavity, and the front width of the compression cavity is smaller than the rear width; the sealing body includes a sealing back, a front end tip, a working surface and a vertical connecting section connected in turn;

[0009] The sealing back surface is located at the top of the sealing body and extends in an upward arc shape, and the end thereof is gradually thinned to form a sharp front end tip; the front end tip is located at the front end of the sealing body and has a wedge structure; the working surface is located at the lower part of the sealing body and extends in an upward arc shape; the vertical connecting section is located between the sealing back surface and the working surface and has a vertical structure, and the vertical section is outwardly connected to the mounting handle; and the mounting handle has a rectangular structure in cross section.

[0010] Further, the sealing body is composed of a multi-layer structure, including a surface fabric layer, a surface rubber layer, a reinforced fabric layer and an internal rubber layer; the surface fabric layer covers the outer surface of the sealing body; the surface rubber layer is located between the surface fabric layer and the reinforced fabric layer; the reinforced fabric layer is embedded in the interior of the sealing body and continuously distributed along the cross-sectional direction of the sealing body; and the internal rubber layer is located at the inner side of the reinforced fabric layer.

[0011] Further, the sealing back surface and the front end tip are connected through a first circular arc transition connection; the working surface and the vertical connecting section are connected through a second circular arc transition connection; and the vertical connecting section and the sealing back surface are connected through a third circular arc transition connection.

[0012] Further, the mounting handle is provided with a plurality of mounting holes, which are uniformly distributed along the length direction of the mounting handle.

[0013] Further, the ratio of the length of the mounting handle to the total length of the sealing body is 1:4 to 1:6.

[0014] Further, the ratio of the height of the vertical connecting section to the length of the sealing body is 1:2 to 1:4.

[0015] Further, the ratio of the front end height of the compression cavity to the rear end height thereof is 1:1.5 to 1:4.

[0016] Further, the length of the front end tip accounts for 1 / 10 to 1 / 6 of the total length of the sealing body.

[0017] Further, the outer surface of the surface fabric layer is covered with a wear-resistant material layer.

[0018] Further, the mounting handle is selected from a metal mounting handle; the reinforced fabric layer is selected from an aramid fiber fabric layer, a glass fiber fabric layer, a polyester mesh fabric layer or a carbon fiber fabric layer; and the internal rubber layer is selected from a silicone rubber layer, a fluororubber layer or an acrylonitrile-butadiene rubber layer.

[0019] Compared with the prior art, the utility model has the beneficial effects as follows:

[0020] The utility model discloses a hollow sword section design, and the width ratio of front and back end is reasonably adjusted in compression cavity, makes the sealing element can provide greater elastic deformation ability under dynamic motion condition, satisfies the special demand of dynamic big gap and multi-angle variable cross section sealing, the multi-arc transition design of sealing main part makes stress distribution more uniform, especially under the cooperation of the wedge structure of front end tip, the sealing element keeps good sealing performance and stability under complex stress condition.

[0021] The utility model discloses a multilayer structure, surface covering surface fabric layer with wear -resisting material layer has improved the wear resistance and anti -aging ability of sealing element obviously, embedded reinforcing fabric layer provides higher strength and rigidity, can limit excessive deformation, and can improve the reliability of dynamic sealing, adopts silicon rubber, fluorine rubber or nitrile rubber inside, not only gives sealing element good resilience and chemical stability, still expands its use temperature range, adapts to severe environmental conditions, prolongs the product life.

[0022] The utility model discloses the optimization of compression cavity front and back end height and width ratio, and sealing element realizes more efficient deformation coordination under different conditions, and the length optimization of front end tip further enhances the precision and reliability of sealing performance.

[0023] Certainly, the various technical solutions of the utility model need not to reach all advantages described above simultaneously. DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will to the drawing needed to be used in the embodiment or prior art description simple introduction, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain the drawing of other embodiments according to these drawings.

[0025] Figure 1 It is the structural schematic diagram of the utility model embodiment;

[0026] Figure 2 It is the layered structure schematic diagram of the utility model embodiment;

[0027] Figure 3 It is the use state schematic diagram of the utility model embodiment;

[0028] Figure 4 It is the working surface and motion mechanism keep close before and after the rotation-75 ° motion of the utility model embodiment schematic diagram;

[0029] Figure 5 It is the working surface and motion mechanism keep close before and after the rotation-35 ° motion of the utility model embodiment schematic diagram.

[0030] Fig.

[0031] 1-sealing body, 101-sealing back, 102-front end tip, 103-working surface, 104-vertical connecting section; 105-surface fabric layer, 106-surface rubber layer, 107-reinforced fabric layer, 108-internal rubber layer;

[0032] 2-mounting handle;

[0033] 3-mounting mechanism;

[0034] 4-motion mechanism. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0036] In the description of the present patent, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present patent and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present patent.

[0037] In the description of the present patent, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0038] The present application will be described in detail below with reference to the specific embodiments of the drawings.

[0039] Embodiment:

[0040] As Figures 1 to 5 shown, the present application provides a large deformation pneumatic load rubber composite sealing seal. The seal is a strip-shaped structure, and its cross section is a knife-shaped structure, mainly including a sealing body 1 and a mounting handle 2. The sealing body 1 is a hollow structure, forming a compression cavity, and the width of the front part of the cavity is smaller than that of the rear part, so as to realize the optimization of compression characteristics at different positions.

[0041] The sealing body 1 is composed of multiple functional components, including a sealing back 101, a front tip 102, a working surface 103, and a vertical connecting section 104 in sequence. The sealing back 101 is located at the top of the sealing body and extends upward in an arc shape, with its end gradually thinning and connected to the front tip 102 through a first circular arc transition. The front tip 102 is located at the front end of the sealing body and has a wedge-shaped structure for fitting the motion mechanism 4 and providing stable sealing pressure. The working surface 103 is located at the lower part of the sealing body and also extends upward in an arc shape, connected to the vertical connecting section 104 through a second circular arc transition. The vertical connecting section 104 has a vertical structure for connecting the sealing body 1 to the mounting handle 2 and achieving integrated connection with the mounting handle 2 through a horizontal section. The mounting handle 2 has a rectangular cross-section and uniformly distributes multiple mounting holes in its length direction for fixing the sealing element through the mounting mechanism 3.

[0042] As shown in Figure 2 , the sealing body 1 has a multi-layer structure, including a surface fabric layer 105, a surface rubber layer 106, a reinforced fabric layer 107, and an internal rubber layer 108. The surface fabric layer 105 covers the outer surface of the sealing body, significantly improving wear resistance. The surface rubber layer 106 is located between the surface fabric layer 105 and the reinforced fabric layer 107, providing strong adhesion. The reinforced fabric layer 107 is embedded inside the sealing body and continuously distributed along the cross-sectional direction, mainly using aramid fiber fabric layers, glass fiber fabric layers, or carbon fiber fabric layers, and polyester mesh fabric to significantly improve the strength and stiffness of the sealing element while limiting excessive deformation. The internal rubber layer 108 is made of silicone rubber, fluororubber, or nitrile rubber, providing high resilience, corrosion resistance, and wide temperature adaptability, thereby ensuring the stable operation of the sealing element in extreme environments.

[0043] As shown in Figures 3 to 5 , the sealing element always fits the motion mechanism 4 during operation, whether rotating to -75° or -35° working conditions, and can absorb and disperse external forces through its arc structure and multi-layer design, achieving good dynamic sealing performance. Specifically, as shown in Figure 3 , the layered structure of the sealing element under static and dynamic working conditions is clearly visible, where the surface rubber layer covers the outer layer and provides high resilience and wear resistance when in contact with the motion mechanism 4; the reinforced fabric layer and the compression cavity work together to uniformly disperse and absorb external forces through the arc structure, ensuring the flexibility and fitting performance of the sealing element; Figure 4 , the working surface still closely fits the motion mechanism 4 under the extreme working condition of rotating to -75°. At this time, the arc-shaped back of the sealing element is stretched outward due to rotational stress, but the compression cavity absorbs external forces through deformation, the front tip maintains linear contact with the motion mechanism, ensuring the integrity of the seal and stability under aerodynamic load; Figure 5The state of the sealing element under the condition of rotation at-35° is described, and the multi-arc transition region of the sealing element can fully exert the advantage of flexible deformation compared with the limit rotation angle; the front end region of the compression cavity absorbs part of the pressure through deformation, and simultaneously enhances the uniform dispersion of stress of the fabric layer in the cross-sectional direction, so that the sealing element can not only remain stable during movement, but also adapt to the dynamically changing gap.

[0044] The utility model discloses through reasonable optimization sealing element each part's shape and ratio, such as the front end height of compression cavity and the back end height ratio is 1:1.5 to 1:4, and the front end tip length accounts for 1 / 10 to 1 / 6 of the total length of sealing main body, and in the embodiment, the front end height and the back end height ratio is 1:2.5, and the front end tip length accounts for 1 / 8 of the total length of sealing main body, and the performance reliability of sealing element is further enhanced.

[0045] Through the double optimization of material and structure, the utility model not only is applicable to the aerodynamic load sealing of aircraft body, but also can be applied to other dynamic sealing big gap, multi-angle variable cross-section scenes, for example, the complex movement sealing demand of automobile, high speed railway or industrial equipment.

[0046] It should be noted that the above-described embodiments and drawings are only specific application modes of the utility model, and those skilled in the art can deform or equivalently replace the shape, ratio and material within the range of the technical scheme of the utility model without departing from the utility model, and these deformations and replacements also fall within the protection scope of the utility model.

Claims

1. A large deformation pneumatic load rubber composite seal, characterized in that, The sealing piece is in a strip structure, and its cross section is in a knife-shaped structure. The sealing piece comprises a sealing body and a mounting handle, the sealing body is internally hollow to form a compression cavity, and the front width of the compression cavity is smaller than the rear width; the sealing body comprises a sealing back, a front end tip, a working surface and a vertical connecting section connected in sequence; The sealing back is located at the top of the sealing body and extends in an upward arc shape, and its end gradually thins to form a sharp front end tip; the front end tip is located at the front end of the sealing body and is in a wedge-shaped structure; the working surface is located at the lower part of the sealing body and extends in an upward arc shape; the vertical connecting section is located between the sealing back and the working surface and is in a vertical structure, and the vertical section connects the mounting handle horizontally and outwardly; the mounting handle is in a rectangular structure in cross section.

2. The large-deformation pneumatic load rubber composite seal as claimed in claim 1, wherein, The sealing body is composed of multiple layers, including a surface fabric layer, a surface rubber layer, a reinforced fabric layer and an internal rubber layer; the surface fabric layer covers the outer surface of the sealing body; The surface rubber layer is located between the surface fabric layer and the reinforced fabric layer; The reinforced fabric layer is embedded in the interior of the sealing body and continuously distributed along the cross section direction of the sealing body; and the internal rubber layer is located at the inner side of the reinforced fabric layer.

3. The large-deformation pneumatic load rubber composite seal as claimed in claim 1, wherein, The sealing back and the front end tip are connected through a first arc transition; the working surface and the vertical connecting section are connected through a second arc transition, and the vertical connecting section and the sealing back are connected through a third arc transition.

4. The large-deformation pneumatic load rubber composite seal as recited in claim 1, wherein, The mounting handle is provided with a plurality of mounting holes, which are uniformly distributed along the length direction of the mounting handle.

5. The large-deformation pneumatic load rubber composite seal as claimed in claim 1, wherein, The ratio of the length of the mounting handle to the total length of the sealing body is 1:4 to 1:

6.

6. The large-deformation pneumatic load rubber composite seal as defined in claim 1, wherein, The ratio of the height of the vertical connecting section to the length of the sealing body is 1:2 to 1:

4.

7. The large-deformation pneumatic load rubber composite seal as defined in claim 1, wherein, The ratio of the front end height of the compression cavity to the rear end height is 1:1.5 to 1:

4.

8. The large-deformation pneumatic load rubber composite seal as defined in claim 1, wherein, The length of the front end tip accounts for 1 / 10 to 1 / 6 of the total length of the sealing body.

9. The large-deformation pneumatic load rubber composite seal as claimed in claim 2, wherein, The outer surface of the surface fabric layer is covered with a wear-resistant material layer.

10. The large-deformation pneumatic load rubber composite seal as claimed in claim 2, wherein, The mounting handle is selected from metal mounting handles; the reinforced fabric layer is selected from aramid fiber fabric layers, glass fiber fabric layers or carbon fiber fabric layers, and polyester mesh fabric; and the internal rubber layer is selected from silicone rubber layers, fluororubber layers or nitrile rubber layers.

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