CN116654239A - Quick-release sealing flap assembly suitable for model with water forced landing function - Google Patents

Quick-release sealing flap assembly suitable for model with water forced landing function Download PDF

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Publication number
CN116654239A
CN116654239A CN202310438499.3A CN202310438499A CN116654239A CN 116654239 A CN116654239 A CN 116654239A CN 202310438499 A CN202310438499 A CN 202310438499A CN 116654239 A CN116654239 A CN 116654239A
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CN
China
Prior art keywords
sealing
flap
edge
main body
strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310438499.3A
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Chinese (zh)
Inventor
陶国敏
金筱薇
代丽丽
范光华
方自文
杨东雷
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China Helicopter Research and Development Institute
Original Assignee
China Helicopter Research and Development Institute
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Publication date
Application filed by China Helicopter Research and Development Institute filed Critical China Helicopter Research and Development Institute
Priority to CN202310438499.3A priority Critical patent/CN116654239A/en
Publication of CN116654239A publication Critical patent/CN116654239A/en
Pending legal-status Critical Current

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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
    • B64C1/14—Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
    • 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
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Toys (AREA)

Abstract

The invention belongs to the technical field of helicopter structures, and discloses a quick-release sealing flap assembly suitable for a model with a water forced landing function. The flap assembly has the capability of bearing the instant rapid impact force of water contact while ensuring the convenient disassembly and sealing functions, forms an electric lap joint low-impedance passage with an adjacent metal structure to ensure the safety of an airplane when suffering from lightning stroke, has reliable sealing performance, does not damage the integrity of a structure and a sealing adhesive tape, and the edge of the edge sealing strip and the positioning pin plays a limiting role on the sealing adhesive tape, so that the sealing function of the structure is reliable and the flap assembly is suitable for being used in marine environment.

Description

Quick-release sealing flap assembly suitable for model with water forced landing function
Technical Field
The invention belongs to the technical field of helicopter structures, relates to a helicopter flap assembly, and in particular relates to a quick-release sealing flap assembly suitable for a model with a water forced landing function.
Background
The opening cover is a structural element fixed at the opening of the surface of the machine body and used for maintaining the aerodynamic shape of the machine body, and meanwhile, the opening cover needs to have quick-release capability matched with maintenance frequency in order to meet the requirements of installation, maintenance and use of equipment in the machine body; when the flap is positioned at the bottom of the belly and the aircraft needs to have water forced landing capability, the flap also needs to bear the rapid impact force generated by the structure due to the surface tension of water at the moment of water contact; the port cover is positioned on the surface of the helicopter body, and when the helicopter needs to execute a thunderstorm flight task or a ground shutdown state encounters lightning, the port cover assembly needs to participate in the formation of a lightning current path on the surface of the whole helicopter so as to ensure the safety of the plane; due to the harshness of the helicopter in flying marine environments, the flap assembly needs to have environmental corrosion resistance.
The prior helicopter can dismantle sealing flap assembly usually adopts the structural form of a frame, a flap, a fastener and a compressed rubber type adhesive tape, and the fastener usually adopts bolts, screws or quick-release nails, which is characterized in that: the mouth frame is directly connected with the mouth cover, bolt holes are required to be formed in the mouth frame and the mouth cover, the mouth cover is repeatedly disassembled for a long time in actual use, the mouth frame is positioned in a high stress area through the connecting holes, and cracks are easy to occur to the mouth frame, so that the structure is damaged; the sealing rubber strip is provided with the fastener through holes, so that the structural integrity of the sealing rubber strip cannot be maintained, and the sealing performance is affected; when the size of the mouth cover is larger, a large number of fasteners are required to be arranged, and the disassembly is time-consuming and inconvenient; the existing flap assembly is often used as a non-bearing member, has weak bearing capacity, and cannot meet the requirement of bearing the rapid impact force of water contact.
Disclosure of Invention
The purpose of the invention is that: in order to solve the problems, the invention provides a quick-release sealing flap assembly suitable for a model with a water forced landing function, provides a novel flap assembly form for a helicopter needing to execute a water forced landing task, has the capability of supporting the water forced landing, and can prevent lightning and corrosion.
The technical scheme of the invention is as follows:
the utility model provides a quick-release sealing flap subassembly suitable for model with water forced landing function, includes flap main part and joint strip, and the cross-section of flap main part is the ship shape, and the central line of rectangle platelike structure is buckled down and is formed the shape of bead promptly, and the direction of central line is the course, and joint strip establishes in the outer fringe of flap main part, and the flap main part is connected with helicopter structure through the connecting device in four angles.
Further, the flap main part includes top panel, lower panel and aluminium honeycomb, and the top panel is pasted at aluminium honeycomb upper surface, and the lower panel is pasted at aluminium honeycomb lower surface, and the edge portion of top panel and lower panel is equipped with glass cloth banding with aluminium honeycomb's side.
Further, the edge of the aluminum honeycomb is provided with steps, so that the upper surface of the aluminum honeycomb is slightly smaller than the lower surface of the aluminum honeycomb; the edge sealing positions of the glass cloth comprise all step surfaces.
Further, the sealing strip comprises n sealing strips, wherein the sealing strips are of strip structures with L-shaped sections, the L-shaped sections of the sealing strips are attached to the upper surface of the flap main body and are fixed outside the vertical surface of the step in a detachable manner, and the n sealing strips are respectively arranged at the edges of the flap main body and compress the sealing adhesive tape; the number of n is determined according to the length of the individual bead, the area of the flap body and the spacing distance of the adjacent beads.
Further, the inner side of the sealing rubber strip is provided with a bent edge, a gap is arranged between the edge sealing strip and the step vertical surface and the step transverse surface of the flap main body, and the bent edge is clamped into the gap.
Further, the fixed mounting structure of the edge banding is: the upper surface of the flap main body is close to the edge part of the step and is provided with a blind hole, an embedded part is arranged in the blind hole and is solidified together with the flap main body, the embedded part is provided with a threaded blind hole, and the upper edge of the edge sealing strip is connected with the threaded blind hole of the embedded part through a screw.
Further, when the flap main body is installed on the helicopter, steps at the edge of the flap main body are all arranged in the upper opening frame of the body structure of the helicopter, the steps and the upper opening frame of the body structure form square grooves for containing sealing rubber strips, and the sealing rubber strips are circumferentially attached between the step surfaces and the surfaces of the upper opening frame of the body structure to finish sealing.
Further, the sealing rubber strip is an O-shaped sealing ring with multiple contacts, particularly a main body of the O-shaped sealing ring, at least two protruding lines are arranged along the circumferential direction of the O-shaped sealing ring, and the last protruding line of the outer ring part of the O-shaped sealing ring is the line with the highest protrusion.
Further, a conductive structure is arranged at a position of the flap main body, which is close to the metal structure of the body, and the conductive structure is connected with a conductive device of the metal structure of the body through an outgoing line.
Further, the edge banding strip of two places around the flap main part navigation changes into locating pin subassembly, and the locating pin subassembly includes locating bottom plate and locating pin, and the locating bottom plate is the same structure but buckles for the bead shape of buckling of flap main part, is equipped with the hole of the locating hole of aiming at the fuselage on the locating bottom plate, and the locating pin inserts in the hole of locating hole and locating bottom plate.
The invention has the beneficial effects that:
1. the position of the flap component is larger than 1m in external dimension due to the requirement of the helicopter for hanging cargoes, so that the flap component has the capability of bearing the instantaneous rapid impact force of water contact while ensuring the convenient disassembly and sealing functions through reasonable structural configuration design.
2. The flap assembly of the present invention forms an electrically lapped low impedance path with adjacent metallic structures to ensure aircraft safety when struck by lightning.
And 3, in addition, the flap assembly selects reasonable surface protection measures to meet the flight corrosion-resistant requirements of the marine environment or other severe environments.
4. The sealing performance of the invention is reliable: the sealing flap component does not damage the integrity of the structure and the sealing rubber strip, and the edge sealing strip and the bent edge of the positioning pin play a limiting role on the sealing rubber strip, so that the structure and the sealing function are reliable.
5. The flap assembly is simple to install and convenient to maintain: the structure is detachable, the number of quick-release locks is small, and the installation and maintenance of the flap assembly are convenient; the edge sealing strip is detachable, and the sealing rubber strip is convenient to install and replace.
6. At present, the flap assembly is already implemented on the machine, and the actual effect is good.
Drawings
FIG. 1 is a schematic view of the sealing flap assembly of the present invention;
FIG. 2 is a schematic cross-sectional view of a flap of the present invention;
FIG. 3 is a schematic view of the main body configuration of the flap of the present invention;
FIG. 4 is a schematic diagram of the flap sealing function of the present invention;
FIG. 5 is a schematic view of the dowel installation of the present invention;
FIG. 6 is a schematic view of the structure of the locating pin of the present invention;
FIG. 7 is a schematic view of the butterfly lock mounting structure of the present invention;
FIG. 8 is a schematic view of the butterfly lock mounting structure of the present invention;
FIG. 9 is a schematic view of the butterfly lock mounting structure of the present invention;
FIG. 10 is a schematic view of a lightning protection bypass of the present invention;
the door comprises a 1-door body, a 2-edge strip, a 3-locating pin, a 4-sealing adhesive tape, a 5-sealing butterfly lock, a 6-upper panel, a 7-lower panel, an 8-aluminum honeycomb, a 9-glass cloth, a 10-J-97 middle temperature adhesive film, a Wen Dejiao in 11-J-96 middle temperature adhesive film, a 12- +J-95 middle temperature adhesive film, a 13-screw, a 14-embedded piece, a 15-machine body structure upper opening frame, a 16-sealing gasket, a 17-machine body locating hole, a 18-bent edge, a 19-3M adhesive, a 20-machine body lock seat, a 21-bolt, a 22-spring bolt, a 23-disc type hole, a 24-handle, a 25-door assembly bonding bolt, a 26-door assembly bonding gasket, a 27-door assembly bonding nut, a 28-machine body metal structure bonding gasket, a 30-bonding wire, a 31-machine body metal structure bonding bolt and a 32-machine body metal structure bonding nut.
Detailed Description
This section is an embodiment of the present invention for explaining and explaining the technical solution of the present invention. Embodiments of the invention and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. refer to directions or positional relationships given to the drawings for convenience of description and simplicity of description, and do not indicate or imply that the apparatus or case in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "first," "second," etc. may explicitly or implicitly include more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the mechanical connection can be realized, and the point connection can be realized; either directly or via an intermediate profile, or by communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The utility model provides a quick-release sealing flap subassembly suitable for have water forced landing function model, includes flap main part 1 and joint strip 4, and the cross-section of flap main part 1 is the ship shape, and the central line of rectangle platelike structure is buckled down and is formed the shape of bead promptly, and the direction of central line is the course, and joint strip 4 establishes at the outer fringe of flap main part 1, and flap main part 1 is connected with helicopter structure through four corner connecting device.
The flap main body 1 comprises an upper panel 6, a lower panel 7 and an aluminum honeycomb 8, wherein the upper panel 6 is adhered to the upper surface of the aluminum honeycomb 8, the lower panel 7 is adhered to the lower surface of the aluminum honeycomb 8, and edge parts of the upper panel 6 and the lower panel 7 are provided with edge sealing edges of glass cloth 9 on the side surfaces of the aluminum honeycomb 8.
The edge of the aluminum honeycomb 8 is provided with steps, so that the upper surface of the aluminum honeycomb 8 is slightly smaller than the lower surface of the aluminum honeycomb 8; the edge sealing positions of the glass cloth 9 comprise all step surfaces.
The door further comprises n edge sealing strips 2, wherein the edge sealing strips 2 are of strip structures with L-shaped sections, the L-shaped sections of the edge sealing strips 2 are attached to the upper surface of the door main body 1 and are outside the vertical surface of the step and are detachably fixed, and the n edge sealing strips 2 are respectively arranged at the edge of the door main body 1 and compress the sealing adhesive tape 4; the number of n is determined according to the length of the single trimming 2, the area of the flap body 1 and the interval distance of the adjacent trimming 2.
The inner side of the sealing rubber strip 4 is provided with a bent edge 18, a gap is arranged between the sealing edge strip 2 and the step vertical surface and the step transverse surface of the flap main body 1, and the bent edge 18 is clamped into the gap.
The fixed mounting structure of the edge banding 2 is: the upper surface of the flap main body 1 is provided with a blind hole near the edge part of the step, an embedded part 14 is arranged in the blind hole and is solidified together with the flap main body 1, the embedded part 14 is provided with a threaded blind hole, and the upper edge of the edge sealing strip 2 is connected with the threaded blind hole of the embedded part 14 through a screw 13.
When the flap main body 1 is installed on the helicopter, steps at the edge of the flap main body 1 are all arranged in the upper opening frame 15 of the machine body structure of the helicopter, the steps and the upper opening frame 15 of the machine body structure form square grooves for containing sealing rubber strips 4, and the sealing rubber strips 4 are circumferentially attached between the step surfaces and the surfaces of the upper opening frame 15 of the machine body structure to finish sealing.
The sealing rubber strip 4 is an O-shaped sealing ring with multiple contacts, in particular to a main body of the O-shaped sealing ring, at least two protruding lines are arranged along the circumferential direction of the O-shaped sealing ring, and the last protruding line of the outer ring part of the O-shaped sealing ring is the highest protruding line.
At the position of the flap main body 1 close to the body metal structure, a conductive structure is arranged, and the conductive structure is connected with a conductive device of the body metal structure through an outgoing line.
The edge banding strip 2 of two places around the flap main part 1 navigation changes into locating pin subassembly 3, and locating pin subassembly 3 includes locating bottom plate and locating pin, and the locating bottom plate is the same structure but buckles for the bead shape of buckling of flap main part 1 for the edge banding strip 2, is equipped with the hole of the locating hole 17 of aiming at the fuselage on the locating bottom plate, and the locating pin inserts in the hole of locating hole 17 and locating bottom plate.
Another embodiment of the present invention will be described below with reference to the accompanying drawings.
A large-scale quick-release sealing flap assembly with lightning protection, corrosion protection and capability of bearing water forced landing pressure is shown in fig. 1, and consists of a flap main body 1, a sealing strip 2, a locating pin 3, a sealing rubber strip 4 and a sealing butterfly lock 5:
step 1, designing a flap main body 1:
as shown in fig. 2, the section of the flap main body 1 is designed into a ship shape, so that the instant water impact force of water forced landing can be buffered;
as shown in FIG. 3, the main body 1 of the flap adopts an aluminum panel and aluminum honeycomb structure, the upper panel 6 and the lower panel 7 are both made of 2A12 aluminum alloy plates, and the thickness is 0.5mm; the aluminum honeycomb 8 material is aluminum honeycomb core material-53-4-0.05 (II) -delta 25HB5443, the height is 25mm, the density is 53kg/mm < 3 >, and the moisture resistance and the impact resistance of the aluminum honeycomb are all superior to those of paper honeycomb; the upper panel 6 and the aluminum honeycomb 8 and the lower panel 7 and the aluminum honeycomb 8 are bonded by adopting a Wen Dejiao 11+J-95 medium-temperature adhesive film 12 in J-96; surface treatment is carried out between the upper panel 6 and the lower panel 7 before bonding by phosphoric acid anodization; the flap main body 1 adopts a J-97 medium temperature adhesive film 10 for edge sealing, and the edge sealing thickness is 2mm; after edge sealing, two layers of glass cloth 9 are adopted for edge sealing, the edge sealing length is 30mm, and the edge sealing glass cloth 9 and the flap are bonded by adopting a Wen Dejiao 11+J-95 medium-temperature adhesive film 12 in J-96; the mouth cover main body 1 is put into a furnace for heating and cementing forming, and H06-27 anticorrosion primer is sprayed on the surface after forming;
step 2, designing edge banding 2:
as shown in fig. 1, the sealing strip 2 is arranged around the flap body 1 for one round, and serves as a functional member for fixing the adhesive tape;
as shown in fig. 4, the sectional shape of the edge sealing strip 2 is L-shaped, the surface treatment mode is boric acid anodized +H206-27 anticorrosion primer, the primer is connected with the flap main body 1 through a screw 13 with the diameter of 4mm, the upper panel 6 of the flap main body 1 is provided with a hole phi 4.2, the aluminum honeycomb 8 is provided with a hole phi 15mm, an embedded part 14 is fixed by using a J-97 medium temperature adhesive film 10, and the embedded part 14 is fed into a furnace together with the flap main body 1 for curing; the screw 13 is screwed into the embedded part 14, and the diameter size of the embedded part 14 corresponds to the diameter size of the screw 13; in order to bear the pressing force of the sealing rubber strip arranged on the flap component on the edge sealing strip 2, under the condition that the screw joint edge distance d meets l (2 x d+1) mm or more, the screws 13 are uniformly distributed around according to the interval of about 120 mm;
step 3, designing a locating pin 3:
as shown in fig. 5, the locating pin 3 is made of 7050 aluminum alloy, and the surface treatment mode is boric acid anodized +h06-27 anticorrosive primer; the positioning pins 3 are arranged at the front and rear sides of the aviation direction of the flap main body 1 and are aligned with the positioning holes 17 of the body, and the positioning holes 17 of the body have a limiting function when the flap assembly is installed; the positioning pin 3 is arranged on the flap main body in the same way as the edge sealing strip 2; as shown in fig. 6, the cross section of the positioning pin 3 is L-shaped, and the L-shaped bent edge plays a role of limiting the sealing rubber strip; the tail end of the positioning pin 3 is in a cone shape, so that the flap assembly is more beneficial to installation and guiding;
step 4, designing a sealing rubber strip 4:
as shown in fig. 4, the sealing rubber strip 4 adopts an O-shaped ring with multiple contacts, the compression performance of the O-shaped ring rubber strip is good, and compared with rubber strips with other cross section forms, the sealing rubber strip can reduce the locking force while guaranteeing the same compression amount; after the adhesive tape is compressed, one contact can form a sealing line, a plurality of contacts form a plurality of sealing lines, and after the last long contact is extruded, a rolled waterproof bank is formed, so that the sealing performance of the sealing adhesive tape is more reliable; the sealing rubber strip 4 is clamped into a gap formed by the edge sealing strip 2 and the flap main body 1 with the bent edge 18, so that the installation reliability of the rubber strip is enhanced; the contact surface between the sealing rubber strip 4 and the flap main body 1 is designed to be a plane, and the sealing rubber strip 4 is adhered to the flap main body 1 through 19 3M glue, so that the rubber strip is further fixed on the flap main body 1;
step 5, arranging a sealed butterfly lock 5:
as shown in fig. 1, the sealed butterfly lock 5 is disposed at four corners of the flap main body 1, the butterfly lock 5 controls the movement of the lock tongue 22 by breaking the handle 24, and the lock tongue 22 is fixed on the body lock seat 20;
as shown in fig. 7, the sealed butterfly lock 5 is fixed on the flap main body 1 through 4 bolts 21 with the diameter of 5mm, 4 inserts with the corresponding diameters are embedded in the flap main body 1 at the positions corresponding to the 4 bolts, the fixing mode of the inserts is the same as that of the inserts 14, the holes phi of the upper panel 6 are 14.3mm, and the holes phi of the aluminum honeycomb 8 are 18mm;
as shown in fig. 8 and 9, in order to mount the sealed butterfly lock 5, the butterfly lock uses a sealing gasket 16 to seal between the lock and the structure; the lower panel 7 and the aluminum honeycomb 8 are provided with dish-shaped holes 23, the dish-shaped holes 23 are sized to avoid interference with a butterfly lock, the honeycomb is sealed by using a J-97 medium-temperature adhesive film 10, and the sealing thickness is 3mm;
step 6, designing a lightning protection grounding passage:
as shown in fig. 7, the cover assembly iron bolt 25, the cover assembly iron washer 26 and the cover assembly iron nut 27 are arranged at the position on the cover main body 1 as close as possible to the metal structure of the machine body 1
As shown in fig. 10, a position as close as possible to the flap assembly iron bolt 25 is selected on the body metal structure 28, and a body metal structure grounding nut 32, a body metal structure grounding washer 29 and a body metal structure grounding bolt 31 are arranged at 1;
an iron wire 30 is arranged, one end of the iron wire 30 is arranged between the machine body metal structure iron gasket 29 and the machine body metal structure iron nut 32, and the other end is arranged between the flap assembly iron gasket 26 and the flap assembly iron nut 27;
the opening of the opening cover main body 1 is carried out at the position of the opening cover assembly bonding bolt 25, the aluminum honeycomb at the position of the through hole is sealed by using the J-97 medium temperature adhesive film 10, and the sealing thickness is 3mm;
removing each protection layer from the contact area between the head of the bonding bolt 25 of the cover assembly and the lower panel 7 until the metal is exposed; removing each protection layer from the contact area of the cover assembly bonding nut 27 and the bonding wire 30 until the metal is exposed; removing each protection layer from the contact area between the head of the machine body metal structure bonding bolt 31 and the machine body metal structure 28 until the metal is exposed; removing each protection layer from the contact area of the body metal structure bonding nut 32 and the bonding wire 30 until the metal is exposed;
current transfer path: cover main body lower panel 7- & gtcover assembly bonding bolt 25- & gtcover assembly bonding bolt 27- & gtcover assembly bonding gasket 26- & gtbonding wire 30- & gtbody metal structure bonding gasket 29- & gtbody metal structure bonding bolt 32- & gtbody metal structure 28- & gtbody grounding point.
The key points of the invention are as follows:
1. the invention maintains the structural integrity of the mouth cover, the mouth frame and the sealing adhesive tape, and has reliable structural sealing performance;
2. the ship-shaped opening cover is used, so that the impact force of the body on water forced landing into water is reduced;
3. the aluminum honeycomb with high density and high thickness is used for the main body of the opening cover, so that the opening cover has strong bearing capacity;
4. the invention uses the edge sealing strip for edge bending, thereby playing a limiting role on the sealing adhesive tape;
5. according to the invention, the sealing strip can be detached, so that the sealing adhesive tape is easy to install and detach, and the interchangeability of the sealing adhesive tape in the flap assembly is ensured;
6. the invention uses the locating pin, the guiding function of the locating pin makes the installation of the large-scale flap simple;
7. the positioning pin belt used by the invention is bent, so that the sealing rubber strip is limited;
8. the invention uses the O-shaped section and the multi-contact sealing rubber strip, so that the sealing performance of the machine body structure is more reliable;
9. the invention uses the sealed butterfly lock, the butterfly lock has larger locking force to the common quick-release lock, and the reliable installation of the flap is ensured;
10. the butterfly lock used by the invention is provided with the sealing gasket, so that the sealing performance of the butterfly lock through hole on the flap main body is ensured;
11. the number of the butterfly locks used in the invention is small, so that the large-scale flap assembly is ensured to be disassembled simply and quickly;
12. the lightning protection grounding passage is designed, so that the safety of the aircraft after being struck by lightning is ensured;
the invention selects proper materials and surface protection measures at the exposed part in the external environment, thereby avoiding the problem of environmental corrosion.
The invention has the advantages that:
1) The application range is wide: the design method can be used in any large-scale flap assembly which needs to execute the water forced landing task and ensure the sealing performance of the structure;
2) The sealing performance is reliable: the integrity of the structure and the sealing rubber strip is not damaged by the sealing cover assembly, and the sealing rubber strip is limited by the edge sealing strip and the bent edge of the positioning pin, so that the structure sealing function is reliable;
3) The corrosion resistance is reliable: reasonable surface protection measures are adopted, so that the structure is reliable in environmental corrosion resistance;
4) The lightning protection performance is reliable: the lightning protection grounding passage is designed, so that the grounding passage is simple and high in conductivity, and the aircraft is safe and reliable;
5) The bearing capacity is reliable: the section form of the cover assembly and the use of the aluminum honeycomb ensure that the bearing capacity of the cover assembly is reliable;
6) The installation is simple, and the maintenance is convenient: the structure is detachable, the number of quick-release locks is small, and the installation and maintenance of the flap assembly are convenient; the edge sealing strip is detachable, and the sealing rubber strip is convenient to install and replace.
The foregoing is merely a detailed description of the invention, which is not a matter of routine skill in the art. However, the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a quick-release sealing flap subassembly suitable for have water forced landing function model, its characterized in that includes flap main part (1) and joint strip (4), and the cross-section of flap main part (1) is the ship shape, and the central line of rectangle platelike structure is buckled down and is formed the shape of bead promptly, and the direction of central line is the course, and joint strip (4) are established at the outer fringe of flap main part (1), and flap main part (1) are connected with helicopter structure through the connecting device of four angles.
2. The quick-release sealing flap assembly suitable for a model with a water forced landing function according to claim 1, wherein the flap main body (1) comprises an upper panel (6), a lower panel (7) and an aluminum honeycomb (8), the upper panel (6) is adhered to the upper surface of the aluminum honeycomb (8), the lower panel (7) is adhered to the lower surface of the aluminum honeycomb (8), and edge parts of the upper panel (6) and the lower panel (7) are provided with edge sealing edges of glass cloth (9) with the side surface of the aluminum honeycomb (8).
3. The quick release sealing flap assembly for a model with water forced landing function according to claim 2, characterized in that the edge of the aluminum honeycomb (8) is provided with steps so that the upper surface of the aluminum honeycomb (8) is slightly smaller than the lower surface of the aluminum honeycomb (8); the edge sealing positions of the glass cloth (9) comprise all step surfaces.
4. The quick-release sealing flap assembly with the water forced landing function according to claim 3, further comprising n edge banding strips (2), wherein the edge banding strips (2) are long strip structures with L-shaped cross sections, the L-shape of the edge banding strips (2) is attached to the upper surface of the flap main body (1) and is outside a step vertical surface and is detachably fixed, and the n edge banding strips (2) are respectively arranged at the edge of the flap main body (1) and compress sealing rubber strips (4); the number of n is determined according to the length of the single edging strip (2), the area of the flap body (1) and the spacing distance of adjacent edging strips (2).
5. The quick-release sealing flap assembly suitable for a model with a water forced landing function according to claim 4, wherein the inner side of the sealing rubber strip (4) is provided with a bent edge (18), a gap is arranged between the edge sealing strip (2) and the step vertical surface and the step transverse surface of the flap main body (1), and the bent edge (18) is clamped into the gap.
6. A quick release sealing flap assembly adapted for use with a model having a water forced landing function according to claim 4, wherein the fixed mounting structure of the edge strip (2) is: a blind hole is formed in the upper surface of the flap main body (1) close to the edge of the step, an embedded part (14) is arranged in the blind hole and is solidified together with the flap main body (1), a threaded blind hole is formed in the embedded part (14), and the upper edge of the edge sealing strip (2) is connected with the threaded blind hole of the embedded part (14) through a screw (13).
7. The quick-release sealing flap assembly suitable for a model with a water forced landing function according to claim 5, wherein when the flap main body (1) is installed on a helicopter, steps at the edge of the flap main body (1) are all arranged in an upper opening frame (15) of a machine body structure of the helicopter, the steps and the upper opening frame (15) of the machine body structure form a square groove for accommodating a sealing rubber strip (4), and the sealing rubber strip (4) is circumferentially attached between the step surface and the surface of the upper opening frame (15) of the machine body structure to finish sealing.
8. The quick-release sealing flap assembly suitable for a model with a water forced landing function according to claim 7 is characterized in that the sealing rubber strip (4) is an O-shaped sealing ring with multiple contacts, particularly a main body of the O-shaped sealing ring, at least two protruding lines are arranged along the circumferential direction of the O-shaped sealing ring, and the last protruding line of the outer ring part of the O-shaped sealing ring is the highest protruding line.
9. The quick release sealing flap assembly as claimed in claim 4, wherein the sealing strip (2) of the flap main body (1) is changed into a positioning pin assembly (3), the positioning pin assembly (3) comprises a positioning bottom plate and a positioning pin, the positioning bottom plate is of the same structure as the sealing strip (2) but is bent by matching with the shape of a bending convex edge of the flap main body (1), a hole aligned with a positioning hole (17) of the body is formed in the positioning bottom plate, and the positioning pin is inserted into the positioning hole (17) and the hole of the positioning bottom plate.
10. A quick release sealing flap assembly adapted to a model with a water forced landing function according to claim 1, characterized in that a conductive structure is provided at a position of the flap body (1) close to the body metal structure, the conductive structure being connected to the conductive means of the body metal structure by means of a lead-out wire.
CN202310438499.3A 2023-04-21 2023-04-21 Quick-release sealing flap assembly suitable for model with water forced landing function Pending CN116654239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310438499.3A CN116654239A (en) 2023-04-21 2023-04-21 Quick-release sealing flap assembly suitable for model with water forced landing function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310438499.3A CN116654239A (en) 2023-04-21 2023-04-21 Quick-release sealing flap assembly suitable for model with water forced landing function

Publications (1)

Publication Number Publication Date
CN116654239A true CN116654239A (en) 2023-08-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310438499.3A Pending CN116654239A (en) 2023-04-21 2023-04-21 Quick-release sealing flap assembly suitable for model with water forced landing function

Country Status (1)

Country Link
CN (1) CN116654239A (en)

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