CN113879509A - Sealing rubber strip and pneumatic sealing structure for narrow space connection - Google Patents
Sealing rubber strip and pneumatic sealing structure for narrow space connection Download PDFInfo
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- CN113879509A CN113879509A CN202111242251.7A CN202111242251A CN113879509A CN 113879509 A CN113879509 A CN 113879509A CN 202111242251 A CN202111242251 A CN 202111242251A CN 113879509 A CN113879509 A CN 113879509A
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- rubber strip
- connecting surface
- pneumatic
- main body
- sealing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/06—Frames; Stringers; Longerons ; Fuselage sections
- B64C1/12—Construction or attachment of skin panels
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a sealing rubber strip and a pneumatic sealing structure for narrow-space connection. The rubber strip comprises a rubber strip main body (11), wherein the outer side and the inner side of the rubber strip main body (11) are respectively provided with a connecting surface I (12) and a connecting surface II (6); one side of the connecting surface I (12) is open, and the other side of the connecting surface I is connected with the pneumatic fitting surface (13) after protruding towards the outer side of the rubber strip main body (11); one side of the connecting surface II (6) is open, the other side of the connecting surface II is connected with one side of an anti-abrasion boss (7) protruding towards the inner side of the rubber strip main body (11), the other side of the anti-abrasion boss (7) is connected with one side of a transition surface (14) gradually sinking towards the outer side of the rubber strip main body (11), and the other side of the transition surface (14) is connected with the tongue opening area (9). The pneumatic sealing device has the advantages of difficult deformation, good fitting and easy installation, and is suitable for pneumatic sealing of the edge of a part with narrow space and large curvature.
Description
Technical Field
The invention belongs to the technical field of large airplane sealing, and particularly relates to a sealing rubber strip and a pneumatic sealing structure for narrow space connection.
Background
In a vertical tail wingtip fairing of a T-type tail large airplane, a fairing skin positioned between a lower wing surface of a horizontal tail and a vertical box section needs to coordinate up-and-down deformation from a horizontal stabilizing surface, a P-type rubber sealing strip is generally designed at the upper part of the fairing skin, and the lower part of the fairing skin can be designed into a sealing structure and L-shaped section connection or disconnection connection according to the loading condition of the airplane. For small aircraft, releasing the connection has little effect on aerodynamic performance because of the lower load. If the lower part of the fairing skin of the large airplane is released, airflow is easy to enter through a gap, and the fairing skin can be separated from the main structure under the action of the atmospheric pressure and even cause flight accidents, so the lower part of the fairing skin of the large airplane needs to be designed into a sealing structure.
In addition, the radome fairing overall dimension is big, contains the big curvature appearance, and traditional word section bar or P section bar rubber spare make the rubber sealing strip warp easily, take place fold or the theoretical appearance that bulges too much, can not laminate with perpendicular box section face well, hardly reach good sealed effect, and easy the appearance warp in assembly and the use leads to sealed not tight. The traditional L-shaped section connection has the defects of narrow space and insufficient connection space of the connection area of the fairing skin and the main structural member, so that the internal connecting piece and the main structural member are in contact and friction to damage the main structural member.
Disclosure of Invention
The purpose of the invention is: provided are a sealing rubber strip and a pneumatic sealing structure for narrow space connection. The pneumatic sealing device has the advantages of difficult deformation, good fitting and easy installation, and is suitable for pneumatic sealing of the edge of a part with narrow space and large curvature.
The technical scheme of the invention is as follows: a sealing rubber strip comprises a rubber strip main body, wherein a connecting surface I and a connecting surface II are respectively arranged outside and inside the rubber strip main body; one side of the connecting surface I is open, and the other side of the connecting surface I is connected with the pneumatic fitting surface after protruding towards the outer side of the rubber strip main body; one side of the connecting surface II is open, the other side of the connecting surface II is connected with one side of an anti-abrasion boss protruding towards the inner side of the rubber strip main body, the other side of the anti-abrasion boss is connected with one side of a transition surface gradually sinking towards the outer side of the rubber strip main body, and the other side of the transition surface is connected with the tongue opening area.
In the sealing rubber strip, an arc recess is further formed between the other side of the transition surface and the tongue opening.
In the sealing rubber strip, the rubber strip body is wrapped by the outer fabric.
The pneumatic sealing structure provided with the sealing rubber strip is characterized in that the connecting surface I is connected with a fairing skin; connecting the connecting surface II with the pressing strip; the tongue mouth region is pressed against the plane vertical box section face.
In the pneumatic sealing structure, the fairing skin and the pressing strip are respectively fixed on the connecting surface I and the connecting surface II through the double-sided countersunk rivets.
In the pneumatic sealing structure, the compression between the tongue opening area and the plane vertical box section is 2-3 mm.
In the pneumatic sealing structure, the minimum distance from the anti-abrasion boss to the plane vertical box section surface is not more than 1 mm.
In the pneumatic sealing structure, the rubber strip main body is made of silicon rubber G044, and the outer fabric is D1000.
In the pneumatic sealing structure, the pressing strip adopts 2024-O-delta 1.27, and the double-sided countersunk head rivet is of a CSR90433-5E series
The invention has the advantages that: the pneumatic sealing structure of the invention uses the rubber sealing strip with the tongue mouth and the local boss-shaped section, and realizes the deformation coordination and the pneumatic sealing of the fairing skin in the lateral load direction through the compression deformation of the tongue mouth; the structure can realize good matching for the pneumatic sealing environment of the edge of the narrow space and large curvature part of the large aircraft fairing.
The boss is arranged in the vertical box surface of the airplane and is firstly contacted and rubbed with the vertical box surface of the airplane so as to avoid the friction and the damage of the layering and the vertical box surface of the airplane, prolong the service life of the large airplane and reduce the maintenance cost of the large airplane.
According to the invention, through the design of the pneumatic fitting surface, the matching of the rubber sealing strip and the theoretical appearance of the fairing is realized, and further, the good pneumatic performance of the fairing is realized.
The invention makes the compression between the tongue mouth area and the plane vertical box section area 2-3 mm; this structure, on the one hand can avoid the too big circumstances that leads to whole pneumatic seal structure to warp and finally destroy theoretical aerodynamic configuration that leads to of compressive capacity, and on the other hand this compressive capacity can avoid the load that comes from the perpendicular box section face direction of perpendicular to aircraft to cause the tongue mouth district to break away from the perpendicular box section face of aircraft and finally lead to the sealed condition of failing, and its reliability is stronger.
In conclusion, the pneumatic sealing device has the advantages of difficult deformation, good lamination and easy installation, and is suitable for pneumatic sealing of the edge of a part with narrow space and large curvature.
Drawings
FIG. 1 is a schematic view of the structure of a sealing rubber strip of the present invention;
FIG. 2 is a schematic structural view of the pneumatic sealing structure of the present invention;
fig. 3 is a schematic view of the installation position of the pneumatic sealing structure of the present invention.
Reference numerals: 1-fairing skin, 2-rubber sealing strip, 3-layering, 4-double-sided countersunk rivet, 5-vertical box section surface, 6-connecting surface II, 7-anti-abrasion boss, 8-arc recess, 9-tongue area, 10-outer layer fabric, 11-rubber strip main body, 12-connecting surface I, 13-pneumatic fitting surface and 14-transition surface.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example 1. A pneumatic sealing structure for narrow space connection is shown in figures 2 and 3 and comprises a rubber sealing strip 2, a fairing skin 1, a pressing strip 3 and a double-faced countersunk rivet 4.
The structure of the sealing rubber strip 2 is shown in figure 1:
the tongue mouth area 9 of the sealing rubber strip 2 protrudes out of the vertical box section surface 5 of the main structure of the airplane by about 2mm, so that the sealing rubber strip 2 achieves the purposes of deformation coordination and pneumatic sealing through the deformation of the rubber strip.
The connecting surface I12 and the connecting surface II 6 of the sealing rubber strip 2 are respectively fixed by a fairing skin 1 and a pressing strip 3 and are connected by a double-sided countersunk rivet 4.
The minimum distance between the anti-abrasion boss 7 of the rubber sealing strip 2 and the vertical box section face 5 is not more than 1mm, so that the pneumatic appearance after installation is ensured while the aluminum pressing strip 3 is prevented from touching and rubbing the vertical box section face 5.
The outer fabric 10 of the rubber sealing strip 2 plays the roles of preventing abrasion and prolonging the service life of the rubber sealing strip 2.
In summary, the rubber sealing strip with the tongue mouth and the local boss-shaped cross section structure used in the invention avoids the direct contact between the connecting piece and the main structure surface by the inner boss, so as to achieve the purpose of protecting the main structure. The tongue opening area is arranged to achieve deformation coordination and sealing in the direction of the side load through deformation of the sealing rubber strip. The matching of the theoretical appearance of the rubber sealing strip 2 and the theoretical appearance of the fairing 1 is realized through the external pneumatic fitting surface 13, and good pneumatic performance is realized.
Example 2. A sealing rubber strip is shown in figure 1 and comprises a rubber strip main body 11, wherein the outer side and the inner side of the rubber strip main body 11 are respectively provided with a connecting surface I12 and a connecting surface II 6; one side of the connecting surface I12 is open, and the other side of the connecting surface I is connected with the pneumatic fitting surface 13 after protruding towards the outer side of the rubber strip main body 11; one side of the connecting surface II 6 is open, the other side of the connecting surface II is connected with one side of an anti-abrasion boss 7 protruding towards the inner side of the rubber strip main body 11, the other side of the anti-abrasion boss 7 is connected with one side of a transition surface 14 gradually sinking towards the outer side of the rubber strip main body 11, and the other side of the transition surface 14 is connected with the tongue opening area 9.
An arc-shaped recess 8 is arranged between the other side of the transition surface 14 and the tongue mouth area 9.
The rubber strip body 11 is wrapped by the outer fabric 10.
The pneumatic sealing structure provided with the sealing rubber strip is formed by connecting a connecting surface I12 with a fairing skin 1 as shown in figures 2-3; connecting the connecting surface II 6 with the pressing strip 3; the tongue region 9 is pressed against the aircraft vertical box section face 5.
The fairing skin 1 and the hold-down strip 3 are respectively fixed on the connecting surfaces I and II through double-sided countersunk rivets 4.
The amount of compression between the lingual area 9 and the vertical box section 5 of the aircraft is 2-3 mm.
The minimum distance from the anti-wear boss 7 to the vertical box section face 5 of the airplane is not more than 1 mm.
The rubber strip body 11 is made of silicon rubber G044, and the outer-layer fabric 10 is made of D1000.
The batten 3 adopts 2024-O-delta 1.27, and the double-sided countersunk head rivet 4 is of a CSR90433-5E series.
The above embodiments are merely illustrative of the embodiments of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. A sealing rubber strip is characterized by comprising a rubber strip main body (11), wherein the outer side and the inner side of the rubber strip main body (11) are respectively provided with a connecting surface I (12) and a connecting surface II (6); one side of the connecting surface I (12) is open, and the other side of the connecting surface I is connected with the pneumatic fitting surface (13) after protruding towards the outer side of the rubber strip main body (11); one side of the connecting surface II (6) is open, the other side of the connecting surface II is connected with one side of an anti-abrasion boss (7) protruding towards the inner side of the rubber strip main body (11), the other side of the anti-abrasion boss (7) is connected with one side of a transition surface (14) gradually sinking towards the outer side of the rubber strip main body (11), and the other side of the transition surface (14) is connected with the tongue opening area (9).
2. Strip according to claim 1, characterised in that between the other side of the transition surface (14) and the mouth area (9) there is also provided a circular arc depression (8).
3. Sealing rubber strip according to claim 1, characterized in that the rubber strip body (11) is wrapped by an outer fabric (10).
4. A pneumatic sealing structure equipped with a sealing rubber strip according to any one of claims 1 to 3, characterized in that the connecting surface i (12) is connected to the cowling skin (1); connecting the connecting surface II (6) with the pressing strip (3); the tongue opening region (9) is pressed against the aircraft vertical box section face (5).
5. A pneumatic sealing structure according to claim 4, characterised in that the fairing skin (1) and the trim strip (3) are fixed to the joint faces I, II respectively by means of double-sided countersunk rivets (4).
6. Pneumatic sealing arrangement according to claim 4, characterised in that the compression between the tongue-and-groove area (9) and the vertical box section plane (5) of the aircraft is 2-3 mm.
7. Pneumatic sealing arrangement according to claim 4, characterised in that the minimum distance of the wear protection boss (7) to the aircraft vertical box section face (5) does not exceed 1 mm.
8. Pneumatic sealing structure according to claim 5, characterised in that the rubber strip body (11) is of silicon rubber G044 and the outer fabric (10) is of D1000.
9. Pneumatic sealing structure according to claim 5, characterised in that the bead (3) is 2024-O- δ 1.27 and the double-sided countersunk head rivet (4) is of the CSR90433-5E series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111242251.7A CN113879509A (en) | 2021-10-25 | 2021-10-25 | Sealing rubber strip and pneumatic sealing structure for narrow space connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111242251.7A CN113879509A (en) | 2021-10-25 | 2021-10-25 | Sealing rubber strip and pneumatic sealing structure for narrow space connection |
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| Publication Number | Publication Date |
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| CN113879509A true CN113879509A (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111242251.7A Pending CN113879509A (en) | 2021-10-25 | 2021-10-25 | Sealing rubber strip and pneumatic sealing structure for narrow space connection |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100243810A1 (en) * | 2009-03-30 | 2010-09-30 | Airbus Espana, S.L. | Integrative structure for aircraft fairing |
| CN103625636A (en) * | 2013-11-27 | 2014-03-12 | 中国航空工业集团公司西安飞机设计研究所 | Sealing structure of composite motion surface |
| CN204300349U (en) * | 2014-11-17 | 2015-04-29 | 中国航空工业集团公司西安飞机设计研究所 | A kind of rubber weather strip |
| CN209196102U (en) * | 2018-11-07 | 2019-08-02 | 中国航空工业集团公司西安飞机设计研究所 | A kind of sealing structure of control surface |
| CN214397183U (en) * | 2020-11-17 | 2021-10-15 | 中航通飞华南飞机工业有限公司 | Sealing installation structure for ice-throwing-preventing plate of propeller plane body |
-
2021
- 2021-10-25 CN CN202111242251.7A patent/CN113879509A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100243810A1 (en) * | 2009-03-30 | 2010-09-30 | Airbus Espana, S.L. | Integrative structure for aircraft fairing |
| CN103625636A (en) * | 2013-11-27 | 2014-03-12 | 中国航空工业集团公司西安飞机设计研究所 | Sealing structure of composite motion surface |
| CN204300349U (en) * | 2014-11-17 | 2015-04-29 | 中国航空工业集团公司西安飞机设计研究所 | A kind of rubber weather strip |
| CN209196102U (en) * | 2018-11-07 | 2019-08-02 | 中国航空工业集团公司西安飞机设计研究所 | A kind of sealing structure of control surface |
| CN214397183U (en) * | 2020-11-17 | 2021-10-15 | 中航通飞华南飞机工业有限公司 | Sealing installation structure for ice-throwing-preventing plate of propeller plane body |
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