阅读说明：本技术 一种口盖内部空腔防腐蚀密封方法 (Anti-corrosion sealing method for internal cavity of mouth cover ) 是由 李耀 赵树军 孟要伟 于 2021-08-20 设计创作，主要内容包括：一种口盖内部空腔防腐蚀密封方法,所述口盖含有外蒙皮、内蒙皮,所述的内蒙皮上设有环形的加强窝,外蒙皮与内蒙皮在环形加强窝外侧通过铆钉固定连接为一体结构的口盖本体,在内蒙皮加强窝的顶部开设有灌胶孔；通过该灌胶孔向加强窝内注入液态密封胶；转动口盖本体姿态,使液态密封胶流淌到外蒙皮与内蒙皮的夹层腔内形成密封胶层；待液态密封胶在外蒙皮与内蒙皮的夹层腔内固化形成密封胶层后,封闭灌胶孔即可。(The anti-corrosion sealing method for the cavity in the flap comprises an outer skin and an inner skin, wherein the inner skin is provided with an annular reinforcing nest, the outer skin and the inner skin are fixedly connected to a flap body of an integrated structure at the outer side of the annular reinforcing nest through rivets, and the top of the reinforcing nest of the inner skin is provided with a glue pouring hole; injecting liquid sealant into the reinforcing nest through the sealant injection hole; rotating the posture of the cover body to enable the liquid sealant to flow into a sandwich cavity of the outer skin and the inner skin to form a sealing adhesive layer; and after the liquid sealant is cured in the interlayer cavity of the outer skin and the inner skin to form a sealant layer, sealing the sealant filling hole.)

1. The corrosion-proof sealing method for the cavity inside the mouth cap is characterized by comprising the following steps: 1) the mouth cover comprises an outer skin and an inner skin, wherein the inner skin is provided with an annular reinforcing nest, the outer skin and the inner skin are fixedly connected to a mouth cover body of an integrated structure at the outer side of the annular reinforcing nest through rivets, and 2) the top of the reinforcing nest of the inner skin is provided with a glue filling hole; 3) injecting liquid sealant into the reinforcing nest through the sealant injection hole; 4) rotating the posture of the cover body to enable the liquid sealant to flow into a sandwich cavity of the outer skin and the inner skin to form a sealing adhesive layer; 5) and after the liquid sealant is cured in the interlayer cavity of the outer skin and the inner skin to form a sealant layer, sealing the sealant filling hole.

2. The method for anticorrosion sealing of the cavity inside the door according to claim 1, wherein the glue hole is sealed by a blind rivet, the blind rivet corresponding to the diameter of the glue hole is selected, and the assembly of the blind rivet is performed by applying a liquid sealant to the stem of the blind rivet to form an annular sealing layer between the blind rivet and the wall of the glue hole.

Technical Field

The application relates to an aircraft anticorrosion design, in particular to an anticorrosion sealing method for an internal cavity of a flap.

Background

The flap used on an aircraft generally consists of an inner skin, an outer skin, a reinforcing section bar, a rotating bracket and a quick release lock. The inner skin, the outer skin and the reinforcing section bar are fixedly connected to form a cover body; the rotating bracket base is fixed on the edge of the opening cover body, and the rotating joint is fixed on the machine body; the quick release lock is fixed on other edges of the cover body to fix the cover on the machine body. The problems in the prior art are as follows: the inner skin and the outer skin are connected through the rivets, so that a cavity between the reinforcing nest of the inner skin and the inner surface of the outer skin is not sealed, water or other corrosive liquid easily permeates into the cavity and is stored for a long time in the using process of the opening cover, and the humidity in the cavity is too high to cause serious corrosion; meanwhile, serious faults such as rivet corrosion, nail cover falling and even separation of inner and outer skins are caused. If only the rusted rivet is replaced in maintenance, the rivet is quickly rusted again under the action of accumulated liquid in the cavity; if accumulated liquid between the inner skin cavity and the outer skin cavity needs to be thoroughly cleaned, the reinforcing section bar, the rotary support, the quick-release lock and all rivets need to be decomposed, the inner skin and the outer skin need to be disassembled, and the inner skin and the outer skin cannot be recovered under the condition of lacking a positioning tool; if the edge of the opening cover is sealed by the sealant, the sealant is easy to fall off when the opening cover is opened and closed; if the inner skin and the outer skin are connected in an adhesive mode, the inner skin and the outer skin can be layered under the action of alternating loads such as aerodynamic force, and the like, so that the cavity is not sealed.

The inside cavity of flap structure that uses on the aircraft at present is difficult to keep sealed, the cavity content easily stores up corrosive liquid, produces the corrosion problem, seriously influences flap structural safety, has caused great influence for the maintenance guarantee simultaneously.

Disclosure of Invention

The utility model provides a can satisfy the long-term sealed requirement of the inside cavity of flap, can guarantee the inside anticorrosion sealing method of flap of the structure safety of flap again, aim at solving the inside cavity of flap structure and be difficult to keep sealed, cavity content and easily store up corrosive liquid, produce the corrosion problem, seriously influence the technical problem of flap structure safety.

The corrosion-proof sealing method for the cavity inside the mouth cap is characterized by comprising the following steps: 1) the mouth cover comprises an outer skin and an inner skin, wherein the inner skin is provided with an annular reinforcing nest, the outer skin and the inner skin are fixedly connected to a mouth cover body of an integrated structure at the outer side of the annular reinforcing nest through rivets, and 2) the top of the reinforcing nest of the inner skin is provided with a glue filling hole; 3) injecting liquid sealant into the reinforcing nest through the sealant injection hole; 4) rotating the posture of the cover body to enable the liquid sealant to flow into a sandwich cavity of the outer skin and the inner skin to form a sealing adhesive layer;

5) and after the liquid sealant is cured in the interlayer cavity of the outer skin and the inner skin to form a sealant layer, sealing the sealant filling hole.

The beneficial effect of this application lies in: the method of sealing by flowing the sealant for a circle completely fills the gap between the inner skin and the outer skin and seals the gap between the inner skin and the outer skin; meanwhile, the internal environment is sealed and controllable, so that the interference of ultraviolet rays is completely avoided, the stable state can be kept for a long time, and the long-term sealing effect is achieved; the sealant is positioned in the inner area between the inner skin and the outer skin, is not influenced by other parts in the movement process of the cover cap, and does not have the possibility of falling off due to extrusion and scraping; the inner skin and the outer skin are connected by rivets, the rivets bear the tension and compression shearing force between the inner skin and the outer skin, the sealant does not participate in force transmission, and the possibility of tearing and damage does not exist.

The present application is described in further detail below with reference to the accompanying drawings of embodiments:

drawings

Fig. 1 is a schematic view showing the fitting relationship of the flaps.

Fig. 2 is a schematic view of a flap structure.

FIG. 3 is a schematic view of the method of corrosion protection sealing the internal cavity of the door.

The numbering in the figures illustrates: the self-locking type self-locking rivet comprises an outer skin 1, an inner skin 2, a blind rivet 3, a sealing adhesive layer 4, a quick-release lock 5, a rotary support 6, a reinforcing section bar 7, a rivet 8, a glue filling hole 9 and a reinforcing nest 10.

Detailed Description

Referring to the attached drawings, the anti-corrosion sealing method for the inside of the flap comprises an outer skin 1, an inner skin 2, a blind rivet 3, a sealant 4, a quick-release lock 5, a rotating bracket 6, a reinforcing section bar 7 and a common rivet 8.

In the implementation, the inner skin 2 is provided with an annular reinforcing socket 10, and the outer skin 1 and the inner skin 2 are fixedly connected with the flap body of an integrated structure through rivets 8 at the outer side of the annular reinforcing socket 10. In order to seal the inner cavity of the reinforcing pit and prevent rainwater from entering the cover structure with corrosion, the top of the reinforcing pit 10 of the inner skin 2 is provided with a glue filling hole 9; injecting liquid sealant into the reinforcing nest 10 through the sealant injecting hole 9; after the liquid sealant is injected, rotating the posture of the cover body to enable the liquid sealant to flow into a sandwich cavity of the outer skin 1 and the inner skin 2 to form a sealant layer 4; and standing for 12 hours to ensure that the sealant layer 4 is completely dried and cured. And after the liquid sealant is cured in the interlayer cavity of the outer skin 1 and the inner skin 2 to form the sealant layer 4, sealing the sealant filling hole 9.

When the glue filling hole 9 is sealed, the glue filling hole 9 is sealed through the self-plugging rivet 3, the self-plugging rivet 3 corresponding to the diameter of the glue filling hole 9 is selected, and the hole plugging assembly is carried out after liquid sealant is coated on a nail rod of the self-plugging rivet 3, so that an annular sealing glue layer 4 is formed between the self-plugging rivet 3 and the hole wall of the glue filling hole 9, and a cavity between the inner skin and the outer skin is thoroughly sealed.

The quick-release lock, the rotating bracket and the reinforcing section bar which are assembled on the flap body can be carried out before sealant is injected, and the quick-release lock, the rotating bracket and the reinforcing section bar can be assembled on the flap body after the sealant pouring hole is sealed.