An adjustable large open area hatch seal structure

Abstract

The application belongs to the technical field of aircraft door sealing, and particularly relates to an adjustable large-opening-area door sealing structure. The structure comprises: a sealing joint fixedly installed on the door; a sealing band stopper fixedly installed on the fuselage; one end of a sealing band fixing plate is fixedly connected with the sealing joint, and a fixed screw sleeve is fixedly installed on the middle part of the sealing band fixing plate; a foot-shaped sealing band is installed on the other end of the sealing band fixing plate through a first clamp, and the foot-shaped sealing band is in extrusion contact with the sealing band stopper; one end of an adjusting skin is fixedly connected with the sealing joint, an adjusting screw is installed on the middle part of the adjusting skin through a countersunk screw, and the adjusting screw is in threaded connection with the fixed screw sleeve; a hollow tube sealing band is installed on the other end of the adjusting skin through a second clamp, and the hollow tube sealing band is in extrusion contact with the foot-shaped sealing band and the sealing band stopper.

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 typically feature large cargo doors to meet loading and unloading requirements. Large door openings often require multiple interfaces and a long sealing boundary. Only structurally reliable door seals can ensure that door leakage meets design requirements and that the cargo hold can be pressurized smoothly. Furthermore, large doors generally have poor overall rigidity due to factors such as size and weight. This, coupled with various errors introduced during manufacturing, installation, and commissioning, makes sealing large doors a significant challenge.

[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 use variable-section sealing strips in parts with complex boundaries. However, when facing extra-large cabin doors, due to the large differences in the sealing boundary shape, step difference, and gap, the above methods cannot completely solve this problem.

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

[0005] The purpose of the present application is to provide an adjustable large-opening 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 door sealing structure, comprising:

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

[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 being mounted on the other end of the sealing belt fixing plate via a first clamp, the foot-shaped sealing belt being 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 being installed in the middle of the adjusting skin via a countersunk screw, and the adjusting screw being threadedly connected to the fixing nut;

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

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

[0015] In at least one embodiment of the present application, the cross-section of the sealing strip 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 multiple sets of bolts.

[0018] In at least one embodiment of the present application, a backing plate is provided at the connection between the regulating 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 shim plate of different thickness is replaced.

[0021] In at least one embodiment of the present application, the door, the sealing joint, the fuselage and the backing plate 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 strip and the hollow tube sealing strip 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 adopts a combined sealing method with a foot-shaped sealing strip as the main component and an adjustable hollow tube sealing strip as the auxiliary component to form a two-sealing structure; it fully utilizes the characteristics of the large complementary deformation of the foot-shaped sealing strip and the good sealing performance of the hollow tube sealing strip; after the first foot-shaped seal, the position of the hollow tube sealing strip is adjusted by adjusting the screw to adapt to the inconsistent sealing boundary step 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 This is a schematic diagram of an adjustable large-opening hatch sealing structure according to one embodiment of the present application;

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

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

[0030] Figure 4 is a view of the adjustment screw shaft according to one 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 strip fixing plate; 4—Fixing nut; 5—First clamp; 6—Foot-shaped sealing strip; 7—Sealing strip stopper; 8—Fuse body structure; 9—Hollow tube sealing strip; 10—Second clamp; 11—Countersunk screw; 12—Adjusting screw; 13—Adjusting skin; 14—Pad. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments 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 the embodiments. 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 understood 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 this application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this 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. Therefore, it should not be understood as limiting the scope of protection of this 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 area hatch 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, such as Figure 1 As shown, a sealing joint 2 is fixedly mounted on the hatch 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, and a foot-shaped sealing belt 6 is installed on the other end of the sealing belt fixing plate 3 via a first clamp 5. 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 by multiple sets of countersunk bolts, and the fixing screw sleeve 4 is installed on the sealing belt fixing plate 3 by multiple sets of bolts.

[0040] One end of the adjusting skin 13 is fixedly connected to the sealing joint 2, and an adjusting screw 12 is installed in the middle of the adjusting skin 13 via a countersunk screw 11. The adjusting screw 12 is threadedly connected to the fixed screw sleeve 4. The hollow tube sealing strip 9 is installed at the other end of the adjusting skin 13 via a second clamp 10. The hollow tube sealing strip 9 is in extrusion contact with the foot-shaped sealing strip 6 and the sealing strip 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. The adjusting skin 13 and the pad 14 are fixedly installed on the sealing joint 2 via multiple sets of countersunk bolts. When the adjustment amount between the fixed screw sleeve 4 and the adjusting screw 12 is greater than the adjustment amount threshold, the pad 14 of different thickness is replaced.

[0041] The adjustable large-opening hatch sealing structure of the present application comprises the hatch 1, sealing joint 2, fuselage 8 and gasket 14, which are all machined parts made of 7050 aluminum alloy. The sealing strip fixing plate 3, the first clamp 5, the sealing strip 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 machined parts made of stainless steel. The foot-shaped sealing strip 6 and the hollow tube sealing strip 9 are both rubber parts. The processing technology of each component is mature, the processing reliability is high, the cost is controllable, and the part size and tolerance are easily 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 when the hatch 1 is closed by squeezing between the foot-shaped sealing strip 6 and the sealing strip stopper 7. However, due to the inconsistent step difference and deformation of each part on the sealing line, a single fixed seal may not be able to achieve the sealing effect. At this time, 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 strip 9 and the sealing strip stopper 7 and the foot-shaped sealing strip 6 can ensure that the corresponding sealing effect is achieved.

[0043] In the adjustable large-opening hatch door sealing structure of the present application, the first seal formed by the foot-shaped sealing strip 6 and the sealing strip stopper 7 can be designed according to the theoretical gap and step difference. The second seal formed by the hollow tube sealing strip 9, the sealing strip stopper 7, and the foot-shaped sealing strip 6 can be adjusted to different compression amounts 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, there is no need 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 door 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 component and an adjustable hollow tube sealing belt 9 as the auxiliary component, 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 sealing boundary step caused by factors such as the cabin door stiffness, installation, and manufacturing. Even if the first foot-shaped seal fails to seal completely, the second hollow tube seal can still complete the sealing, thereby ensuring the sealing effect.

[0048] The adjustable large-opening area cabin door sealing structure of this 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 seals.

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

Claims

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

4. The adjustable large-opening hatch door sealing structure according to claim 3, characterized in that: The sealing belt fixing plate (3) is fixedly mounted on the sealing joint (2) via multiple groups of countersunk bolts.

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

7. The adjustable large-opening hatch door 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 multiple groups of countersunk bolts.

8. The adjustable large-opening hatch door 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 different thickness is replaced.

9. The adjustable large-opening hatch door sealing structure according to claim 8, characterized in that: The hatch (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 hatch door 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 regulating skin (13) are all aluminum alloy sheet metal parts.

11. The adjustable large-opening hatch door 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 hatch door 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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