Aviation composite sealing element resistant to impact vibration
By introducing corrugated and elastic roll structures into aerospace composite seals, the problem of rubber material deformation under impact and vibration is solved, improving the mechanical strength and sealing performance of the seals and extending their service life.
Patent Information
- Application Number
- CN202520482271.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Existing aerospace composite seals are prone to deformation of the rubber material after prolonged use and long-term impact, which reduces the mechanical strength of the seals and affects their sealing performance and service life.
The structure combines corrugated sheets and elastic rolls. The corrugated sheets are located inside the rubber layer, and the elastic rolls are connected to the outside. The corrugated sheets and elastic rolls together enhance the mechanical strength of the seal, absorb vibration and impact energy, and prevent damage to the rubber layer.
It improves the mechanical strength and sealing performance of the seal, extends its service life, reduces fatigue damage to rubber materials, and ensures that the seal remains tightly fitted under pressure.
Smart Images
Figure CN223854835U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to aviation sealing technical field, concretely relates to a kind of aviation composite seal of impact vibration resistance. BACKGROUND
[0002] The aviation composite seal refers to the sealing element formed by two or more different materials, which is used to prevent fluid or solid particles from leaking between adjacent joint surfaces and to prevent external impurities such as dust and moisture from entering the internal system of the aircraft. According to the material composition and functional characteristics, the aviation composite seal can be divided into various types, such as rubber and metal composite seal, rubber and fabric composite seal, etc. The aviation composite seal is a crucial component in the aviation industry, mainly used to ensure the sealing, safety and reliability of various systems of the aircraft, such as fuel system, hydraulic system, engine, etc.
[0003] Currently, the common composite seal is a combination of rubber material and metal V-shaped spring. In use, the V-shaped spring in the above composite seal can provide continuous elastic support for the rubber seal, ensuring that the sealing surface remains tightly bonded when under pressure, thereby improving the sealing effect. The rigid structure of the V-shaped spring can withstand higher pressure, while the rubber is prone to deformation after long-term use and long-term impact, reducing the mechanical strength of the seal. The pressure exerted by the V-shaped spring on the rubber material may not be sufficient to keep the sealing surface tightly bonded when under pressure, which may affect the sealing performance and service life of the seal.
[0004] Therefore, the utility model provides a kind of aviation composite seal of impact vibration resistance. UTILITY MODEL CONTENT
[0005] In view of the problem that the impact resistance of some composite seals in the prior art needs to be improved, the utility model provides a kind of aviation composite seal of impact vibration resistance.
[0006] The utility model adopts the following technical scheme: a kind of aviation composite seal of impact vibration resistance, including seal body, the seal body is composed of rubber layer and wave piece, wave piece is located in rubber layer, and the outer side of wave piece is respectively fixedly connected with elastic roll piece in two symmetrical ends;
[0007] Wave piece is set as wave-shaped annular metal sheet, which is used to improve the mechanical strength of the seal and ensure its sealing performance;
[0008] Elastic roll piece is assembled to increase the mechanical strength of the seal, improve the compression resistance, and avoid damaging the rubber layer when under stress.
[0009] Preferably, a ring groove is formed on one side of the rubber layer, and a V-shaped spring is arranged in the ring groove.
[0010] Preferably, the V-shaped spring is arranged in a ring shape as a whole, and the V-shaped spring is located inside the wave sheet.
[0011] Preferably, the inner wave surface of the wave sheet is close to the V-shaped spring.
[0012] Preferably, the elastic roll sheet comprises a first C-shaped end and a second C-shaped end, the first C-shaped end is fixedly connected with the second C-shaped end, one end of the first C-shaped end away from the second C-shaped end is fixedly connected with the wave sheet, and the elastic roll sheet and the connection part of the elastic roll sheet and the wave sheet are all arranged in an arc surface.
[0013] Preferably, an H1 elastic collapse section is arranged between the second C-shaped end and the wave sheet, and an H2 elastic collapse section is arranged between the first C-shaped end and the second C-shaped end.
[0014] Beneficial effects:
[0015] (1) The aviation composite sealing element capable of resisting impact and vibration, the wave sheet arranged in the rubber layer can provide uniform elastic support for the rubber layer, improve the mechanical strength of the sealing element, when facing radial or axial pressure, the wave sheet and the elastic roll sheet both have deformation space, can absorb vibration and impact energy, reduce fatigue damage of the rubber material, and cooperate with the V-shaped spring, ensure that the rubber sealing element keeps close contact when being pressed, thereby improving the sealing effect.
[0016] (2) The aviation composite sealing element capable of resisting impact and vibration, the elastic roll sheet at both ends of the wave sheet is an arc surface as a whole, when the sealing element body is extruded by external force, the wave sheet as a metal sheet can avoid cutting the rubber layer, causing damage to the rubber layer, thereby prolonging the service life of the sealing element. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0018] Figure 2 It is a sectional view of the overall mechanism of the utility model;
[0019] Figure 3 It is a sectional view of the wave sheet of the utility model;
[0020] Figure 4 It is Figure 3 the enlarged view of A.
[0021] In the drawing: 1, sealing element body; 2, rubber layer; 3, annular groove; 4, V-shaped spring; 5, wave sheet; 6, elastic roll sheet; 61, first C-shaped end; 62, second C-shaped end; 7, H1 elastic collapse section; 8, H2 elastic collapse section. DETAILED DESCRIPTION
[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0023] Example: Figures 1-4 The image shows a composite seal for aviation applications that is resistant to impact and vibration. It includes a seal body 1, which is composed of a rubber layer 2 and a corrugated sheet 5. The corrugated sheet 5 is located inside the rubber layer 2, and elastic rolls 6 are symmetrically fixed to both ends of the outer side of the corrugated sheet 5. The corrugated sheet 5 is configured as a corrugated annular metal sheet to improve the mechanical strength of the seal and ensure its sealing performance. The elastic rolls 6 are assembled to increase the mechanical strength of the seal, improve its compressive strength, and at the same time avoid damaging the rubber layer 2 under stress.
[0024] In this embodiment, when the sealing body 1 is in use, the parts abut against the sealing body 1, the upper end of the V-shaped spring 4 applies pressure to the rubber layers 2 on both sides, and the outer ring corrugated sheet 5 is embedded in the rubber layer 2, which plays a supporting and reinforcing role in the rubber layer 2, thereby improving the strength of the sealing body 1. The inner and outer ring rubber layers 2 of the sealing body 1 always abut against the parts to ensure its sealing performance. When the sealing body 1 is subjected to radial or axial pressure, the corrugated sheet 5 and the elastic roll 6 both have a certain deformation and rebound ability. When facing pressure impact, their elasticity can absorb vibration energy. While improving the mechanical strength of the rubber layer 2, the corrugated sheet 5 and the elastic roll 6 also allow the rubber layer 2 to maintain a certain deformation space, thereby improving the sealing performance of the sealing body 1.
[0025] like Figures 2-4 As shown, an annular groove 3 is provided on one side of the rubber layer 2, and a V-shaped spring 4 is provided in the annular groove 3; the V-shaped spring 4 is arranged in a ring shape and is located inside the corrugated sheet 5; the inner wave surface of the corrugated sheet 5 is close to the V-shaped spring 4; the elastic roll 6 includes a first C-shaped end 61 and a second C-shaped end 62, the first C-shaped end 61 and the second C-shaped end 62 are fixedly connected, the end of the first C-shaped end 61 away from the second C-shaped end 62 is fixedly connected to the corrugated sheet 5, the elastic roll 6 and the connection between the elastic roll 6 and the corrugated sheet 5 are both arc-shaped; an H1 elastic collapse section 7 is provided between the second C-shaped end 62 and the corrugated sheet 5, and an H2 elastic collapse section 8 is provided between the first C-shaped end 61 and the second C-shaped end 62.
[0026] In the embodiment, the V-shaped spring 4 arranged in the inner ring of the sealing body 1 exerts pressure on the rubber layer 2 at the upper end, so that the rubber layer 2 of the inner ring of the sealing body 1 is always in contact with the part. The wave piece 5 of the outer ring of the V-shaped spring 4 supports the rubber layer 2 covering it, and increases the mechanical strength of the rubber layer 2. When the outer ring of the sealing body 1 is in contact with the part, the rubber layer 2 covering the wave piece 5 and the elastic coil piece 6 is extruded, and the elastic coil piece 6 inside is extruded and deformed. The elastic coil piece 6 and the connection between the elastic coil piece 6 and the wave piece 5 are both arranged in an arc surface, so as to avoid the direct contact between the flat metal sheet end and the rubber layer 2, and the cutting of the rubber layer 2 caused by the extrusion of the external force. The wear of the rubber layer 2 is reduced, the service life of the sealing body 1 is prolonged, and the rubber layer 2 is always in contact with the part when the elastic coil piece 6 is extruded and deformed by impact, so as to keep the sealing body 1 closely connected with the part. The wave piece 5 and the elastic coil piece 6 both have a certain deformation space, and can absorb the impact and vibration energy when facing the radial or axial pressure, and reduce the fatigue damage of the rubber material.
[0027] In the embodiment, as shown in the figure, Figure 4 when the sealing body 1 is subjected to radial pressure, the elastic coil piece 6 is extruded and deformed in the radial direction, so that the second C-shaped end 62 approaches the wave piece 5, and the distance of the H1 elastic collapse section 7 between the second C-shaped end 62 and the wave piece 5 starts to decrease. When the second C-shaped end 62 is in contact with the wave piece 5, if the radial pressure continues to be applied, the distance of the H2 elastic collapse section 8 between the first C-shaped end 61 and the second C-shaped end 62 starts to decrease. When the sealing body 1 is subjected to axial pressure, the elastic coil piece 6 is extruded and deformed in the axial direction, and the elastic coil piece 6 has one end connected with the wave piece 5. Therefore, when the elastic coil piece 6 is subjected to axial pressure, the second C-shaped end 62 of the elastic coil piece 6 also approaches the wave piece 5, and the distance of the H1 elastic collapse section 7 decreases. No matter whether the radial pressure or the axial pressure is applied, the rubber layer 2 of the sealing body 1 can always be in contact with the part, so as to ensure the sealing property and also absorb the impact energy.
[0028] Working principle: when the composite sealing element is used, the pressure applied by the two ends of the V-shaped spring 4 promotes the rubber layer 2 to be always closely attached to the part, so as to ensure the sealing property. The V-shaped spring 4 supports the rubber layer 2 of the innermost ring of the sealing body 1 and the rubber layer 2 covering the wave piece 5. At the same time, the wave piece 5 and the elastic coil piece 6 also support the rubber layer 2 covering them, and strengthen the mechanical strength thereof. When the sealing body 1 is extruded and impacted by external force, the elastic coil piece 6 is extruded and deformed, the first C-shaped end 61 and the second C-shaped end 62 thereof are deformed, and the distance between the H1 elastic collapse section 7 and the H2 elastic collapse section 8 changes with the pressure. The distance can adapt to the pressure from the radial direction or the axial direction, absorb the vibration and impact energy, and prolong the service life of the sealing body 1.
[0029] It should be explained finally: above described only is preferred embodiment of the utility model, and is not for limiting the protection scope of the utility model. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be contained in the protection scope of the utility model.
Claims
1. A shock-resistant composite seal for aviation, comprising a seal body (1) consisting of a rubber layer (2) and a corrugated sheet (5) located within the rubber layer (2), characterised in that: The elastic roll piece (6) is fixedly connected with the wave piece (5) at two ends of the wave piece (5) respectively. The wave piece (5) is arranged in a wave-shaped ring-shaped metal piece, which is used for improving the mechanical strength of the sealing element and ensuring the sealing property of the sealing element. The elastic roll piece (6) is arranged to increase the mechanical strength of the sealing element, improve the compression resistance, and avoid damaging the rubber layer (2) when being stressed.
2. The impact-resistant composite seal for aerospace applications of claim 1, wherein: The rubber layer (2) is provided with a ring-shaped groove (3) on one side, and the ring-shaped groove (3) is provided with a V-shaped spring (4).
3. The impact-resistant composite seal for aerospace applications of claim 2, wherein: The V-shaped spring (4) is arranged in a ring shape, and the V-shaped spring (4) is located inside the wave piece (5).
4. The impact-resistant composite seal for aerospace applications of claim 3, wherein: The inner wave surface of the wave piece (5) is close to the V-shaped spring (4).
5. The impact-resistant composite seal for aerospace applications of claim 1, wherein: The elastic roll piece (6) includes a first C-shaped end (61) and a second C-shaped end (62), the first C-shaped end (61) is fixedly connected with the second C-shaped end (62), one end of the first C-shaped end (61) away from the second C-shaped end (62) is fixedly connected with the wave piece (5), and the elastic roll piece (6) and the connection between the elastic roll piece (6) and the wave piece (5) are both arranged in an arc surface.
6. The impact-resistant composite seal for aerospace applications of claim 5, wherein: The second C-shaped end (62) is provided with an H1 elastic collapse section (7) and the first C-shaped end (61) is provided with an H2 elastic collapse section (8).