CN109625296B - Aircraft fuel tank and sealing method of fuel tank cover plate thereof - Google Patents
Aircraft fuel tank and sealing method of fuel tank cover plate thereof Download PDFInfo
- Publication number
- CN109625296B CN109625296B CN201811444047.1A CN201811444047A CN109625296B CN 109625296 B CN109625296 B CN 109625296B CN 201811444047 A CN201811444047 A CN 201811444047A CN 109625296 B CN109625296 B CN 109625296B
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- cover plate
- framework
- glue injection
- upper cover
- plugging
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- 238000007789 sealing Methods 0.000 title claims abstract description 42
- 239000002828 fuel tank Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 99
- 239000007924 injection Substances 0.000 claims abstract description 99
- 239000000565 sealant Substances 0.000 claims abstract description 43
- 239000003292 glue Substances 0.000 claims description 87
- 239000010410 layer Substances 0.000 claims description 13
- 239000004519 grease Substances 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 7
- 230000001050 lubricating effect Effects 0.000 claims description 7
- 239000012945 sealing adhesive Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D37/00—Arrangements in connection with fuel supply for power plant
- B64D37/02—Tanks
- B64D37/06—Constructional adaptations thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/14—Sealings between relatively-stationary surfaces by means of granular or plastic material, or fluid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The application belongs to the technical field of structural design of aircraft fuel tanks, and particularly relates to an aircraft fuel tank which comprises a framework, an upper cover plate and an upper cover plate, wherein the upper cover plate and the framework are designed to realize sealing design through injecting sealant in a sealant injection channel, and the sealant can be injected from a sealant injection hole, so that the design defect that an assembly hole needs to be formed in the upper cover plate and an assembly cover is additionally arranged when the lower cover plate and the framework are assembled in a sealing manner after the upper cover plate and the framework are assembled in a sealing manner can be avoided; in addition, the application also discloses a sealing method of the aircraft fuel tank cover plate, which is used for sealing the aircraft fuel tank framework and the upper cover plate.
Description
Technical Field
The application belongs to the technical field of structural design of aircraft fuel tanks, and particularly relates to an aircraft fuel tank and a sealing method of a fuel tank cover plate of the aircraft fuel tank.
Background
Currently, a plurality of oil tanks with integrated structures are usually designed in an aircraft, and an oil chamber inside the oil tanks is a closed space surrounded by structural members of the aircraft, is used for loading aviation kerosene for an engine of the aircraft, and belongs to a part of the aircraft structure. The integrated structure fuel tank includes: the framework comprises four side walls, namely a first side wall, a second side wall, a third side wall and a fourth side wall; one end of the first side wall is in sealing contact with one end of the second side wall, and the other end of the first side wall is in sealing contact with one end of the fourth side wall; one end of the third side wall is in sealing contact with the other end of the second side wall, and the other end of the third side wall is in sealing contact with the other end of the fourth side wall; one cover plate is arranged on one side of the framework and is in sealing contact with the side wall surfaces of the four side walls on the side; the other cover plate is positioned on the other side of the framework and is in sealing contact with the side wall surfaces of the four side walls positioned on the side; and a closed oil cavity is formed between the two cover plates and the four side walls.
When the integrated structure oil tank is assembled, in order to meet the construction requirement of the sealing design of the integrated structure oil tank, one cover plate is generally assembled to one side of the framework, and at the moment, because the cover plate on the other side is not assembled and is in an open state, the construction channel is smooth, the assembly construction can be conveniently carried out, and the construction requirement of the sealing design is met; and then assembling the other cover plate on the other side of the framework, wherein the opposite side of the other cover plate is in a closed state due to the fact that the assembly is completed, and the construction of the other cover plate is difficult to meet the construction requirement of sealing design. The conventional method for solving the problems is to provide one or more assembly holes on the side wall of the framework and/or any cover plate, construct through the assembly holes, meet the construction requirements of the cover plate sealing design assembled later, and install assembly covers on the assembly holes after the assembly is completed to seal the assembly holes. The above-described assembly method has the following outstanding problems:
1) the integrity of the integrated structure oil tank is damaged by arranging the assembly holes, and the load transmission is influenced;
2) the size of the assembly hole is difficult to control, the construction in the assembly process is influenced when the size of the assembly hole is too small, the construction quality is difficult to guarantee, and the strength of the integrated structure oil tank is seriously weakened when the size of the assembly hole is too large, so that potential safety hazards are formed;
3) install the assembly flap additional, increased the complexity of integrated structure oil tank and the quality of oil tank, and have the problem of repeated sealed after opening.
Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
It is an object of the present application to provide an aircraft fuel tank and a method of sealing a fuel tank flap thereof which overcome or mitigate at least one of the above-mentioned problems.
One aspect of the application provides an aircraft fuel tank, comprising a framework and two cover plates, wherein,
one cover plate is arranged on one side of the framework and is in sealing contact with the side wall surface of the framework on the side, namely the lower cover plate;
the other cover plate is arranged on the other side of the framework and is in sealing contact with the side wall surface of the framework on the side, and the other cover plate is called an upper cover plate;
a closed oil cavity is enclosed among the upper cover plate, the lower cover plate and the framework;
preferably, the first and second electrodes are formed of a metal,
a groove is formed in the circumferential direction of the side wall surface of the framework, facing one side of the upper cover plate, a glue injection channel is formed between the groove and the upper cover plate, and sealant is filled in the glue injection channel;
the upper cover plate is provided with a plurality of glue injection holes, and the glue injection holes are communicated with the glue injection channel;
aircraft tank is still including:
the plugging device is arranged in the glue injection hole and used for plugging the glue injection hole;
and the connecting device is contacted with the framework and the upper cover plate to fixedly connect the framework and the upper cover plate.
Preferably, the plugging device comprises a plugging screw plug which is arranged in the glue injection hole and is used for plugging the glue injection hole.
Preferably, the plugging device further comprises a plugging bushing which is arranged between the glue injection hole and the plugging screw plug, is in sealing contact with the glue injection hole and is in threaded fit connection with the plugging screw plug.
Preferably, the plugging bush protrudes towards the outer wall surface of one end of the framework, and the protrusion is in abutting connection with the inner wall surface of the glue injection hole.
Preferably, the plugging lining is embedded in the glue injection hole.
Preferably, the connecting means comprises:
a connecting bolt;
and the connecting nut is a supporting plate nut and is matched with the connecting bolt to fixedly connect the framework and the upper cover plate.
Preferably, the connecting bolts are multiple, and one part of the connecting bolts is distributed on the outer side of the glue injection channel and is called as outer connecting bolts; the other part is distributed on the inner side of the glue injection channel and is called as an inner connecting bolt;
the connecting nuts are multiple, one part of the connecting nuts is matched with the connecting bolts positioned outside, and the other part of the connecting nuts is matched with the connecting bolts inside.
Preferably, flexible sealant is filled between the side wall surfaces of the framework located at two sides of the glue injection channel and the upper cover plate, and a sealing glue layer is formed after the flexible sealant is vulcanized.
Preferably, the contact surface of the upper cover plate and the sealant layer or the contact surface of the framework side wall surface and the sealant layer is coated with lubricating grease.
The application also provides a sealing method of the aircraft fuel tank cover plate, which is used for sealing the framework and the upper cover plate of the aircraft fuel tank and comprises the following steps:
step one, a groove is formed in a framework, and a preset filler is filled in the groove;
the upper cover plate is provided with a glue injection hole, and the plugging bushing is embedded in the glue injection hole;
coating lubricating grease on one side of the upper cover plate, which faces the framework, or coating lubricating grease on the side wall surface of the framework, which faces the upper cover plate;
step two, pre-connecting the framework and the upper cover plate through a connecting bolt and a connecting nut;
filling flexible sealant in a gap between the side wall surface of the framework and the upper cover plate, and vulcanizing the flexible sealant to form a sealing adhesive layer;
step three, dismantling the connecting bolt and the connecting nut, separating the framework from the upper cover plate, and removing the preset filler in the groove;
connecting the framework with an upper cover plate through a connecting bolt and a connecting nut, and forming a glue injection channel between the upper cover plate and the groove;
step five, taking one of the glue injection holes as an injection hole, injecting sealant into the glue injection channel through the injection hole by using a pressure glue injection gun until the injected sealant overflows from the glue injection hole adjacent to the injection hole, marking the glue injection hole overflowing the sealant as an overflow hole, and plugging the injection hole by matching a plugging screw plug with a plugging bushing in a threaded manner;
taking the overflow hole marked in the fifth step as an injection hole, repeating the fifth step until only one residual glue injection hole is not blocked, and marking the glue injection hole which is not blocked as a final overflow hole;
and step seven, plugging the final overflow hole by the threaded matching of the plugging plug screw and the plugging lining.
The application has at least the following beneficial technical effects: the oil tank comprises a framework, an upper cover plate and an upper cover plate, wherein the upper cover plate and the framework are designed to be sealed by injecting sealant into a sealant injection channel, and the sealant can be injected from a sealant injection hole, so that the design defects that an assembly hole needs to be formed in the upper cover plate and an assembly opening cover needs to be additionally arranged when the upper cover plate and the framework are sealed and assembled after the lower cover plate and the framework are sealed and assembled can be avoided; in addition, the application also discloses a sealing method of the aircraft fuel tank cover plate, which is used for sealing the aircraft fuel tank framework and the upper cover plate.
Drawings
FIG. 1 is a schematic view of the framework and lower cover plate of an aircraft fuel tank of the present application assembled;
FIG. 2 is an assembled exterior view of an aircraft fuel tank of the subject application;
fig. 3 is a sectional view taken along the line a-a in fig. 2.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.
The present application is described in further detail below with reference to fig. 1 to 3.
An aircraft fuel tank comprises a framework 1 and two cover plates, wherein,
a cover plate is arranged on one side of the framework 1 and is in sealing contact with the side wall surface of the framework 1 on the side, and the cover plate is called as a lower cover plate 2;
the other cover plate is arranged on the other side of the framework 1 and is in sealing contact with the side wall surface of the framework 1 on the side, and the other cover plate is called as an upper cover plate 3;
a closed oil cavity is enclosed among the upper cover plate 3, the lower cover plate 2 and the framework 1;
it is characterized in that the preparation method is characterized in that,
a groove is formed in the circumferential direction of the side wall surface of the framework 1, which faces one side of the upper cover plate 3, a glue injection channel is formed between the groove and the upper cover plate, and sealant is filled in the glue injection channel;
the upper cover plate is provided with a plurality of glue injection holes, and the glue injection holes are communicated with the glue injection channel;
aircraft tank is still including:
the plugging device is arranged in the glue injection hole and used for plugging the glue injection hole;
and the connecting device is contacted with the framework 1 and the upper cover plate 3 to fixedly connect the framework 1 and the upper cover plate 3.
Further, the plugging device comprises a plugging screw plug 4 which is arranged in the glue injection hole and used for plugging the glue injection hole.
Further, plugging device is still including shutoff bush 5, sets up between injecting glue hole and shutoff plug screw 4, and it is connected with injecting glue hole sealing contact and with shutoff plug screw 4 screw-thread fit.
Further, the plugging bush 5 protrudes towards the outer wall surface of one end of the framework 1, and the protrusion is in contact connection with the inner wall surface of the glue injection hole. The design can enhance the stability and firmness of the plugging lining 5 in the glue injection hole and ensure the sealing contact of the plugging lining and the glue injection hole.
Further, the plugging lining 5 is embedded in the glue injection hole. The above design avoids tapping directly on the upper cover plate 3, the wall surface being damaged towards the upper cover plate 3.
Further, the connecting device includes: a connecting bolt 6; and the connecting nut 7 is a supporting plate nut and is matched with the connecting bolt 6 to fixedly connect the framework 1 and the upper cover plate 3.
Furthermore, a plurality of connecting bolts 6 are arranged, and a part of the connecting bolts are distributed on the outer side of the glue injection channel and are called as outer connecting bolts; the other part is distributed on the inner side of the glue injection channel and is called as an inner connecting bolt; the connecting nuts 7 are provided in plural, and one part is engaged with the connecting bolt located outside, and the other part is engaged with the connecting bolt located inside.
Furthermore, flexible sealant is filled between the side wall surfaces of the framework 1, which are positioned at two sides of the glue injection channel, and the upper cover plate 3, and the flexible sealant forms a sealing glue layer after being vulcanized. The flexibility of the sealant layer can further enhance the sealing property between the upper cover plate 3 and the frame 1.
Furthermore, the contact surface between the upper cover plate 3 and the sealant layer or the contact surface between the side wall surface of the framework and the sealant layer is coated with lubricating grease. The design can facilitate the splitting between the upper cover plate 3 and the framework 2, and facilitate the efficient splitting and assembling.
A sealing method of an aircraft fuel tank cover plate is used for realizing the sealing of a framework 1 and an upper cover plate 3 of any aircraft fuel tank, and comprises the following steps:
step one, a groove is formed in a framework 1, and a preset filler is filled in the groove;
a glue injection hole is formed in the upper cover plate 3, and the plugging bushing 5 is embedded in the glue injection hole;
coating lubricating grease on one side of the upper cover plate 3 facing the framework 1, or coating lubricating grease on the side wall surface of the framework 1 facing the upper cover plate 3;
step two, pre-connecting the framework 1 and the upper cover plate 3 through a connecting bolt 6 and a connecting nut 7;
filling flexible sealant in a gap between the side wall surface of the framework 1 and the upper cover plate 3, and vulcanizing the flexible sealant to form a sealing adhesive layer;
step three, dismantling the connecting bolt 6 and the connecting nut 7, separating the framework 1 from the upper cover plate 3, and removing the preset filler in the groove;
step four, connecting the framework 1 with the upper cover plate 3 through a connecting bolt 6 and a connecting nut 7, and forming a glue injection channel between the upper cover plate 3 and the groove;
step five, taking one of the glue injection holes as an injection hole, injecting sealant into the glue injection channel through the injection hole by using a pressure glue injection gun until the injected sealant overflows from the glue injection hole adjacent to the injection hole, marking the glue injection hole overflowing the sealant as an overflow hole, and plugging the injection hole by means of the threaded matching of a plugging screw plug 4 and a plugging lining 5;
taking the overflow hole marked in the fifth step as an injection hole, repeating the fifth step until only one residual glue injection hole is not blocked, and marking the glue injection hole which is not blocked as a final overflow hole;
and step seven, plugging the final overflow hole by the threaded matching of the plugging plug screw 4 and the plugging bush 5.
The preset filler is filled in the groove in the first step to prevent the sealant from entering the groove and being difficult to clean when the flexible sealant is filled in the second step; the grease is applied to the side of the upper cover plate 3 facing the frame 1, or the grease is applied to the side wall surface of the frame 1 facing the upper cover plate 3, so as to facilitate the step of separating the frame 1 from the upper cover plate 3 in the third step.
By adopting the method for injecting the sealant into the glue injection channel in the fifth step to the seventh step, the sealant can be effectively ensured to be fully injected into the glue injection channel, and the sealing property between the upper cover plate 3 and the framework 1 is ensured.
The aircraft fuel tank that this embodiment discloses can realize the sealed of oil tank under the complete prerequisite of assurance oil tank overall structure, and when the oil tank border became invalid, only need twist off shutoff plug screw 4 and carry out the injecting glue again through the injecting glue hole again and can restore fast, and this process can not produce the damage to upper cover plate 3.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (1)
1. A sealing method of an aircraft fuel tank cover plate is used for realizing the sealing of a framework (1) and an upper cover plate (3) of an aircraft fuel tank, the aircraft fuel tank comprises the framework (1) and two cover plates, wherein,
one cover plate is arranged on one side of the framework (1) and is in sealing contact with the side wall surface of the framework (1) on the side, and the cover plate is called a lower cover plate (2);
the other cover plate is arranged on the other side of the framework (1) and is in sealing contact with the side wall surface of the framework (1) on the side, and the other cover plate is called an upper cover plate (3);
a sealed oil cavity is enclosed among the upper cover plate (3), the lower cover plate (2) and the framework (1);
a groove is formed in the side wall surface of the framework (1) facing one side of the upper cover plate (3) along the circumferential direction, a glue injection channel is formed between the groove and the upper cover plate, and sealant is filled in the glue injection channel;
the upper cover plate is provided with a plurality of glue injection holes, and the glue injection holes are communicated with the glue injection channel;
the aircraft fuel tank also comprises:
the plugging device is arranged in the glue injection hole and is used for plugging the glue injection hole;
the connecting device is contacted with the framework (1) and the upper cover plate (3) to fixedly connect the framework (1) and the upper cover plate (3);
the plugging device comprises a plugging plug screw (4) which is arranged in the glue injection hole and is used for plugging the glue injection hole;
the plugging device also comprises a plugging lining sleeve (5) which is arranged between the glue injection hole and the plugging screw plug (4), is in sealing contact with the glue injection hole and is in threaded fit connection with the plugging screw plug (4);
the plugging lining (5) protrudes towards the outer wall surface of one end of the framework (1), and the protrusion is in abutting connection with the inner wall surface of the glue injection hole;
the plugging lining (5) is embedded in the glue injection hole;
the connecting device includes:
a connecting bolt (6);
the connecting nut (7) is a supporting plate nut and is matched with the connecting bolt (6) to fixedly connect the framework (1) and the upper cover plate (3);
the connecting bolts (6) are multiple, and one part of the connecting bolts is distributed on the outer side of the glue injection channel and is called as outer connecting bolts; the other part of the connecting bolt is distributed on the inner side of the glue injection channel and is called as an inner connecting bolt;
the connecting nuts (7) are multiple, one part of each connecting nut is matched with the outer connecting bolt, and the other part of each connecting nut is matched with the inner connecting bolt;
flexible sealant is filled between the side wall surfaces of the framework (1) positioned at two sides of the glue injection channel and the upper cover plate (3), and a sealing glue layer is formed after the flexible sealant is vulcanized;
lubricating grease is coated on the contact surface of the upper cover plate (3) and the sealant layer or the contact surface of the side wall surface of the framework and the sealant layer;
the method is characterized by comprising the following steps:
step one, a groove is formed in a framework (1), and a preset filler is filled in the groove;
the upper cover plate (3) is provided with a glue injection hole, and the plugging bushing (5) is embedded in the glue injection hole;
grease is applied to one side of the upper cover plate (3) facing the framework (1), or grease is applied to the side wall surface of the framework (1) facing the upper cover plate (3);
step two, pre-connecting the framework (1) and the upper cover plate (3) through a connecting bolt (6) and a connecting nut (7);
filling flexible sealant in a gap between the side wall surface of the framework (1) and the upper cover plate (3), and vulcanizing the flexible sealant to form a sealing adhesive layer;
step three, dismantling the connecting bolt (6) and the connecting nut (7), separating the framework (1) from the upper cover plate (3), and removing the preset filler in the groove;
connecting the framework (1) with the upper cover plate (3) through a connecting bolt (6) and a connecting nut (7), and forming a glue injection channel between the upper cover plate (3) and the groove;
fifthly, taking one glue injection hole as an injection hole, injecting sealant into the glue injection channel through the injection hole by using a pressure glue injection gun until the injected sealant overflows from the glue injection hole adjacent to the injection hole, marking the glue injection hole overflowing the sealant as an overflow hole, and plugging the injection hole by arranging a plugging screw plug (4) and a plugging lining (5) in a thread fit manner;
taking the overflow hole marked in the fifth step as an injection hole, repeating the fifth step until only one residual glue injection hole is not blocked, and marking the glue injection hole which is not blocked as a final overflow hole;
and seventhly, plugging the final overflow hole by the threaded matching of the plugging plug screw (4) and the plugging lining (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444047.1A CN109625296B (en) | 2018-11-29 | 2018-11-29 | Aircraft fuel tank and sealing method of fuel tank cover plate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444047.1A CN109625296B (en) | 2018-11-29 | 2018-11-29 | Aircraft fuel tank and sealing method of fuel tank cover plate thereof |
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| Publication Number | Publication Date |
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| CN109625296A CN109625296A (en) | 2019-04-16 |
| CN109625296B true CN109625296B (en) | 2022-06-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112739127A (en) * | 2020-12-28 | 2021-04-30 | 维沃移动通信有限公司 | Electronic device |
| EP4249200A1 (en) * | 2022-03-21 | 2023-09-27 | Airbus Operations GmbH | Potting sealant compound for a protective lining of a part, in particular an aircraft part, and associated sealing method |
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2018
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| CN109625296A (en) | 2019-04-16 |
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