Adjustable large-opening-area cabin door sealing structure

Abstract

The invention belongs to the technical field of airplane cabin door sealing, and particularly relates to an adjustable large-opening-area cabin door sealing structure. According to the structure, a sealing joint is fixedly installed on the cabin door; a sealing tape stopper is fixedly mounted on the machine body; one end of the sealing belt fixing plate is fixedly connected with the sealing joint, and a fixing screw sleeve is fixedly mounted in the middle of the sealing belt fixing plate; the foot-shaped sealing tape is mounted at the other end of the sealing tape fixing plate through a first hoop, and the foot-shaped sealing tape is in extrusion contact with the sealing tape stopper; one end of the adjusting skin is fixedly connected with the sealing joint, an adjusting screw is installed in the middle of the adjusting skin through a countersunk screw, and the adjusting screw is in threaded connection with the fixing threaded sleeve; the hollow pipe sealing belt is installed at the other end of the adjusting skin through a second clamp and makes contact with the foot-shaped sealing belt and the sealing belt blocking piece in an extruding mode.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft cabin door sealing, and in particular relates to an adjustable cabin door sealing structure with a large opening area. Background Art

[0002] Large transport aircraft are usually equipped with larger cargo doors to meet loading and unloading requirements. Large door openings often mean more interfaces and longer sealing boundaries. Only with reliable door seals can the cabin door leakage meet the design requirements and the cargo hold can be pressurized smoothly. At the same time, due to the influence of factors such as size and weight, large-sized doors generally have poor overall rigidity. Coupled with various errors generated during manufacturing, installation, and commissioning, large-sized door sealing is a difficult point.

[0003] At present, the sealing of aircraft cabin doors at home and abroad mostly adopts hollow tube seals or "foot-type" seals. Some cabin doors adopt variable-section sealing strips in parts with complex boundaries. However, when facing extra-large cabin doors, the above methods cannot completely solve this problem due to the large differences in the sealing boundary shape, step difference and gap.

[0004] Therefore, it is desired to have a technical solution to overcome or at least alleviate at least one of the above-mentioned defects of the prior art. Summary of the invention

[0005] The purpose of the present application is to provide an adjustable large opening area hatch sealing structure to solve at least one problem existing in the prior art.

[0006] The technical solution of this application is:

[0007] An adjustable large opening hatch sealing structure, comprising:

[0008] A hatch, on which a sealing joint is fixedly mounted;

[0009] A fuselage, wherein a sealing belt stopper is fixedly mounted on the fuselage;

[0010] A sealing belt fixing plate, one end of which is fixedly connected to the sealing joint, and a fixing screw sleeve is fixedly installed in the middle of the sealing belt fixing plate;

[0011] A foot-shaped sealing belt, the foot-shaped sealing belt is mounted on the other end of the sealing belt fixing plate through a first clamp, and the foot-shaped sealing belt is in extrusion contact with the sealing belt stopper;

[0012] An adjusting skin, one end of which is fixedly connected to the sealing joint, an adjusting screw is installed in the middle of the adjusting skin through a countersunk screw, and the adjusting screw is threadedly connected to the fixing screw sleeve;

[0013] A hollow tube sealing belt is installed at the other end of the regulating skin through a second clamp, and the hollow tube sealing belt is in extrusion contact with the foot-shaped sealing belt and the sealing belt stopper.

[0014] In at least one embodiment of the present application, the cross section of the sealing band stopper is C-shaped.

[0015] In at least one embodiment of the present application, a cross section of the sealing belt fixing plate is stepped.

[0016] In at least one embodiment of the present application, the sealing strip fixing plate is fixedly mounted on the sealing joint by a plurality of sets of countersunk bolts.

[0017] In at least one embodiment of the present application, the fixing nut is mounted on the sealing belt fixing plate by means of multiple sets of bolts.

[0018] In at least one embodiment of the present application, a gasket is provided at the connection between the adjusting skin and the sealing joint.

[0019] In at least one embodiment of the present application, the adjusting skin and the backing plate are fixedly mounted on the sealing joint by a plurality of sets of countersunk bolts.

[0020] In at least one embodiment of the present application, when the adjustment amount between the fixing screw sleeve and the adjusting screw is greater than an adjustment amount threshold, a gasket with a different thickness is replaced.

[0021] In at least one embodiment of the present application, the door, the sealing joint, the fuselage and the pad are all 7050 aluminum alloy machined parts.

[0022] In at least one embodiment of the present application, the sealing belt fixing plate, the first clamp, the sealing belt stopper, the second clamp and the adjustment skin are all aluminum alloy sheet metal parts.

[0023] In at least one embodiment of the present application, the fixing screw sleeve, the countersunk screw, and the adjusting screw are all stainless steel machined parts.

[0024] In at least one embodiment of the present application, the foot-shaped sealing belt and the hollow tube sealing belt are both rubber parts.

[0025] The invention has at least the following beneficial technical effects:

[0026] The adjustable large opening area hatch sealing structure of the present application is a combined sealing method with a foot-shaped sealing belt as the main part and an adjustable hollow tube sealing belt as the auxiliary part, forming a two-sealing structure; it fully utilizes the characteristics of the large complementary deformation of the foot-shaped sealing belt and the good sealing performance of the hollow tube sealing belt; after the first foot-shaped seal, the position of the hollow tube sealing belt is adjusted by adjusting the screw to adapt to the inconsistent sealing boundary step difference caused by factors such as hatch stiffness, installation, and manufacturing, so that even if the first foot-shaped seal fails to completely seal, the second hollow tube seal can complete the sealing, thereby ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of an adjustable large opening hatch sealing structure according to an embodiment of the present application;

[0028] Figure 2 This is a view of a fixed screw sleeve shaft according to an embodiment of the present application;

[0029] Figure 3 is a cross-sectional view of a fixing screw sleeve according to an embodiment of the present application;

[0030] Figure 4 is a view of an adjusting screw shaft according to an embodiment of the present application;

[0031] Figure 5 It is a cross-sectional view of an adjusting screw according to one embodiment of the present application.

[0032] in:

[0033] 1—door structure; 2—sealing joint; 3—sealing belt fixing plate; 4—fixing screw sleeve; 5—first clamp; 6—foot-shaped sealing belt; 7—sealing belt stopper; 8—fuselage structure; 9—hollow tube sealing belt; 10—second clamp; 11—countersunk screw; 12—adjusting screw; 13—adjusting skin; 14—gasket. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the embodiment of this application will be described in more detail below in conjunction with the drawings in the embodiment of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of this application, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain this application, and should not be construed as limitations on this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of this application are described in detail below in conjunction with the drawings.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present application.

[0036] The following is combined with Figures 1 to 5 This application is described in further detail.

[0037] The present application provides an adjustable large-opening hatch door sealing structure, comprising: a hatch 1, a fuselage 8, a sealing strip fixing plate 3, a foot-shaped sealing strip 6, an adjustable skin 13 and a hollow tube sealing strip 9.

[0038] Specifically, Figure 1 As shown, a sealing joint 2 is fixedly mounted on the cabin door 1, and a sealing belt stopper 7 is fixedly mounted on the fuselage 8. In a preferred embodiment of the present application, the cross section of the sealing belt stopper 7 is C-shaped.

[0039] One end of the sealing belt fixing plate 3 is fixedly connected to the sealing joint 2, a fixing screw sleeve 4 is fixedly installed in the middle of the sealing belt fixing plate 3, a foot-shaped sealing belt 6 is installed at the other end of the sealing belt fixing plate 3 through a first clamp 5, and the foot-shaped sealing belt 6 is in extrusion contact with the sealing belt stopper 7. In a preferred embodiment of the present application, the cross section of the sealing belt fixing plate 3 is stepped, the sealing belt fixing plate 3 is fixedly installed on the sealing joint 2 through multiple groups of countersunk bolts, and the fixing screw sleeve 4 is installed on the sealing belt fixing plate 3 through multiple groups of bolts.

[0040] One end of the adjusting skin 13 is fixedly connected to the sealing joint 2, and the middle part of the adjusting skin 13 is installed with an adjusting screw 12 through a countersunk screw 11, and the adjusting screw 12 is threadedly connected to the fixing screw sleeve 4; the hollow tube sealing belt 9 is installed at the other end of the adjusting skin 13 through a second clamp 10, and the hollow tube sealing belt 9 is in extrusion contact with the foot-shaped sealing belt 6 and the sealing belt stopper 7. In a preferred embodiment of the present application, a pad 14 is provided at the connection between the adjusting skin 13 and the sealing joint 2, and the adjusting skin 13 and the pad 14 are fixedly installed on the sealing joint 2 through multiple groups of countersunk bolts. When the adjustment amount between the fixing screw sleeve 4 and the adjusting screw 12 is greater than the adjustment amount threshold, the pad 14 of different thicknesses is replaced.

[0041] The adjustable large opening area hatch sealing structure of the present application, the hatch 1, the sealing joint 2, the fuselage 8 and the gasket 14 are all 7050 aluminum alloy machined parts. The sealing belt fixing plate 3, the first clamp 5, the sealing belt stopper 7, the second clamp 10 and the adjustment skin 13 are all aluminum alloy sheet metal parts. The fixing screw sleeve 4, the countersunk screw 11 and the adjustment screw 12 are all stainless steel machined parts. The foot-shaped sealing belt 6 and the hollow tube sealing belt 9 are both rubber parts. Each component has a mature processing technology, high processing reliability, controllable cost, and the size and tolerance of the parts are easy to be guaranteed.

[0042] The adjustable large opening area hatch sealing structure of the present application forms a preliminary seal between the hatch 1 and the fuselage 8 through the extrusion between the foot-shaped sealing band 6 and the sealing band stopper 7 when the hatch 1 is in the closed state. However, due to the inconsistent step difference and deformation of various parts on the sealing line, a single fixed seal may not be able to achieve the sealing effect. In this case, the step difference can be adjusted by the threaded pair between the fixed screw sleeve 4 and the adjusting screw 12. At this time, the fine seal formed between the hollow tube sealing band 9 and the sealing band stopper 7 and the foot-shaped sealing band 6 can ensure that the corresponding sealing effect is achieved.

[0043] In the adjustable large opening hatch sealing structure of the present application, the first seal formed by the foot-shaped sealing belt 6 and the sealing belt stopper 7 can be designed according to the theoretical gap and step difference, and the second seal formed by the hollow tube sealing belt 9, the sealing belt stopper 7 and the foot-shaped sealing belt 6 can be adjusted by adjusting the compression amount at different positions by adjusting the screw 12 in combination with various errors. When the adjustment amount between the fixed screw sleeve 4 and the adjusting screw 12 is small, it is not necessary to adjust the thickness of the pad 14, and the structural deformation can adapt. If the adjustment amount is too large, the thickness of the pad 14 needs to be adjusted.

[0044] The adjustable large opening hatch sealing structure of the present application has the following beneficial effects:

[0045] 1. A combined sealing method with a foot-shaped sealing belt 6 as the main part and an adjustable hollow tube sealing belt 9 as the auxiliary part, forming a two-layer sealing structure;

[0046] 2. Make full use of the characteristics of large supplementary deformation of the foot-shaped sealing belt 6 and good sealing performance of the hollow tube sealing belt 9;

[0047] 3. After the first foot-shaped seal, the position of the hollow tube sealing strip 9 is adjusted by adjusting the screw 12 to adapt to the inconsistent step difference of the sealing boundary caused by factors such as the door stiffness, installation, and manufacturing. Even if the first foot-shaped seal fails to seal completely, the second hollow tube seal can complete the sealing, thereby ensuring the sealing effect.

[0048] The adjustable large opening area cabin door sealing structure of the present application has been subjected to detailed design analysis, which shows that its functions meet the requirements, the sealing effect is excellent, the number of parts is small, and it has good economy and assembly performance. It is applicable to both civil and military aircraft cabin door sealing.

[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An adjustable large opening hatch door sealing structure, characterized in that: include: A hatch (1), wherein a sealing joint (2) is fixedly mounted on the hatch (1); A fuselage (8), wherein a sealing belt stopper (7) is fixedly mounted on the fuselage (8); A sealing belt fixing plate (3), one end of which is fixedly connected to the sealing joint (2), and a fixing screw sleeve (4) is fixedly installed in the middle of the sealing belt fixing plate (3); A foot-shaped sealing belt (6), wherein the foot-shaped sealing belt (6) is mounted on the other end of the sealing belt fixing plate (3) via a first clamp (5), and the foot-shaped sealing belt (6) is in extrusion contact with the sealing belt stopper (7); An adjusting skin (13), one end of the adjusting skin (13) being fixedly connected to the sealing joint (2), an adjusting screw (12) being installed in the middle of the adjusting skin (13) via a countersunk screw (11), and the adjusting screw (12) being threadedly connected to the fixing screw sleeve (4); A hollow tube sealing strip (9) is installed at the other end of the adjusting skin (13) through a second clamp (10), and the hollow tube sealing strip (9) is in extrusion contact with the foot-shaped sealing strip (6) and the sealing strip stopper (7).

2. The adjustable large opening area hatch sealing structure according to claim 1, characterized in that: The cross section of the sealing belt stopper (7) is C-shaped.

3. The adjustable large opening area hatch sealing structure according to claim 2, characterized in that: The cross section of the sealing belt fixing plate (3) is in a stepped shape.

4. The adjustable large opening area hatch sealing structure according to claim 3, characterized in that: The sealing belt fixing plate (3) is fixedly mounted on the sealing joint (2) by means of a plurality of sets of countersunk bolts.

5. The adjustable large opening area hatch sealing structure according to claim 4, characterized in that: The fixing screw sleeve (4) is mounted on the sealing belt fixing plate (3) via multiple groups of bolts.

6. The adjustable large opening area hatch sealing structure according to claim 5, characterized in that: A gasket (14) is provided at the connection between the adjusting skin (13) and the sealing joint (2).

7. The adjustable large opening area hatch sealing structure according to claim 6, characterized in that: The adjusting skin (13) and the backing plate (14) are fixedly mounted on the sealing joint (2) by means of a plurality of sets of countersunk bolts.

8. The adjustable large opening area hatch sealing structure according to claim 7, characterized in that: When the adjustment amount between the fixing screw sleeve (4) and the adjusting screw (12) is greater than an adjustment amount threshold, a backing plate (14) of a different thickness is replaced.

9. The adjustable large opening area hatch sealing structure according to claim 8, characterized in that: The cabin door (1), the sealing joint (2), the fuselage (8) and the backing plate (14) are all 7050 aluminum alloy machined parts.

10. The adjustable large opening area hatch sealing structure according to claim 9, characterized in that: The sealing belt fixing plate (3), the first clamp (5), the sealing belt stopper (7), the second clamp (10) and the adjusting skin (13) are all aluminum alloy sheet metal parts.

11. The adjustable large opening area hatch sealing structure according to claim 10, characterized in that: The fixing screw sleeve (4), the countersunk screw (11) and the adjusting screw (12) are all stainless steel machined parts.

12. The adjustable large opening area hatch sealing structure according to claim 11, characterized in that: The foot-shaped sealing strip (6) and the hollow tube sealing strip (9) are both rubber parts.

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