Sealing element for airplane access port cover

Abstract

The utility model relates to a sealing element for an airplane access port cover. At present, sealing of the covering cap depends on an O-shaped sealing ring, and for an airplane covering cap, due to the fact that the sealing performance of the O-shaped sealing ring is limited, the water seepage phenomenon is prone to occurring in the using process, and potential safety hazards are caused. The sealing element comprises a sealing element body, the sealing element body is of an annular structure, the sealing element body comprises a sealing lip part, a bending part and a base, the sealing lip part, the bending part and the base are sequentially and integrally arranged from top to bottom, and the sections of the sealing lip part, the bending part and the base are of an S-shaped structure. The diameter of a ring face formed by the upper end of the sealing lip part is smaller than that of a ring face formed by the lower end of the sealing lip part, the included angle between the sealing lip part and the bent part faces the inner side of the sealing piece body, and the included angle between the bent part and the base faces the outer side of the sealing piece body. The sealing effect of the sealing element can be improved, and the problem of water seepage in long-term use is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of seals, in particular to a seal for an aircraft maintenance hatch cover. Background Art

[0002] Aircraft hatches are mainly used for the maintenance of aircraft electronic equipment, accessories, etc. Aircraft hatches are in contact with air, and water seepage is likely to occur during use. Generally, a rubber sealing ring is used as the sealing component of the hatch device.

[0003] At present, the hatch seal relies on an O-ring. For aircraft hatches, due to the limited sealing performance of the O-ring, water seepage is likely to occur during use, posing a safety hazard.

[0004] Therefore, there is an urgent need for a seal for an aircraft hatch cover with good sealing performance. Summary of the Invention

[0005] The purpose of the utility model is to provide a seal for an aircraft maintenance hatch cover to at least solve the problem of poor sealing effect in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A seal for an aircraft maintenance hatch cover includes a seal body. The seal body is of an annular structure. The seal body includes a sealing lip, a bending part and a base. The sealing lip, the bending part and the base are integrally arranged from top to bottom in sequence. The cross-sections of the sealing lip, the bending part and the base are of an S-shaped structure. The diameter of the annular surface formed by the upper end of the sealing lip is smaller than the diameter of the annular surface formed by the lower end of the sealing lip. The included angle between the sealing lip and the bending part faces the inner side of the seal body. The included angle between the bending part and the base faces the outer side of the seal body.

[0008] Further, the upper end surface of the sealing lip is inclined, and the diameter of the annular surface formed by the upper side of the upper end surface of the sealing lip is larger than the diameter of the annular surface formed by the lower side of the upper end surface.

[0009] Further, the distance between the first inner side wall and the first outer side wall of the sealing lip gradually increases from the upper end to the lower end.

[0010] Further, the lower end surface of the sealing lip is a horizontal plane formed by connecting the lower ends of the first inner side wall and the first outer side wall.

[0011] Further, the second inner side wall of the bending part is an arc concave towards the side away from the inner side of the seal body.

[0012] Further, the second outer sidewall of the bent portion includes a first vertical section and an inclined section. The first vertical section is connected to the lower end of the first outer sidewall, and the inclined section is connected to the lower end of the first vertical section.

[0013] Further, the lower end surface of the bent portion is an inclined surface formed by connecting the lower end of the second inner sidewall and the lower end of the inclined section.

[0014] Further, the cross-section of the base is in an L-shaped structure, and the upper end surface and the lower end surface of the base are both horizontally arranged.

[0015] Further, the third inner sidewall of the base is perpendicular to the upper end surface and the lower end surface of the base, and the diameter of the toroidal surface formed by the upper end of the third inner sidewall is the same as the diameter of the toroidal surface formed by the lower end.

[0016] Further, the third outer sidewall of the base includes an inclined surface coinciding with the lower end surface of the bent portion, an arc section, a horizontal section, and a second vertical section. The arc section is connected to the lower end of the inclined section, the horizontal section is connected to the lower end of the arc section, and the second vertical section is connected and perpendicular to the horizontal section.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. In the present utility model, when compressed by itself, the rubber rebounds to provide contact stress to achieve the sealing function. By making full use of the high and low pressures existing in the actual working conditions, the total sealing force provided by the sealing lip is the sum of the initial sealing force of its own compression deformation, the high-pressure side sealing pressure of the first inner sidewall, and the low-pressure side sealing pressure of the inclined section. The sealing effect is improved through the special structure of the sealing member. The sealing force generated by the sealing member not only depends on the modulus of its own material, but the sealing force generated by the surrounding environmental pressure compensates for it, thereby further improving the sealing effect of the sealing member, preventing the water seepage problem that occurs during long-term use, and ensuring the safe flight of the aircraft.

[0019] 2. The product configuration design of the present utility model extends the service life of the sealing member, reduces the replacement cycle of the sealing member, and lowers the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a cross-sectional view of the present utility model;

[0022] Figure 2 is Figure 1 a right - hand side schematic diagram;

[0023] Figure 3 is Figure 2 a cross - sectional view of the sealing lip portion in;

[0024] Figure 4 is Figure 2 a cross - sectional view of the bent portion in;

[0025] Figure 5 is Figure 2 a cross - sectional view of the base in;

[0026] Figure 6 is a cross - sectional view of the mold for manufacturing the present utility model;

[0027] The markings in the figure are:

[0028] 1 - sealing lip portion, 11 - first inner wall, 12 - first outer wall,

[0029] 2 - bent portion, 21 - second inner wall, 22 - first vertical section, 23 - inclined section,

[0030] 3 - base, 31 - third inner wall, 32 - arc section, 33 - horizontal section, 34 - second vertical section,

[0031] 4 - sealing element body, 5 - upper mold, 6 - middle mold, 7 - lower mold. Specific embodiments

[0032] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "attachment", and "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] At the same time, in the description of the present utility model, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. Of course, such objects can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0036] Embodiment:

[0037] As Figure 1 shown, the present embodiment provides a seal for an aircraft maintenance hatch cover, including a seal body 4. The seal body 4 is a ring structure and is made of silicone rubber. The seal body 4 is subjected to a compressive force, and the rubber rebounds to provide contact stress to achieve the sealing function. As Figure 2 shown, the seal body 4 includes a sealing lip 1, a bent portion 2, and a base 3. The sealing lip 1, the bent portion 2, and the base 3 are integrally provided in sequence from top to bottom, and the cross-sections of the sealing lip 1, the bent portion 2, and the base 3 are in an S-shaped structure.

[0038] Among them, the diameter of the annular surface formed by the upper end of the sealing lip 1 is smaller than the diameter of the annular surface formed by the lower end of the sealing lip 1. The upper end surface of the sealing lip 1 is inclined, and the diameter of the annular surface formed by the upper side of the upper end surface is larger than the diameter of the annular surface formed by the lower side of the upper end surface, so that the inner part of the annular shape formed by the upper end surface is in an inverted frustum structure.

[0039] As Figure 3 shown, the distance between the first inner wall 11 and the first outer wall 12 of the sealing lip 1 gradually increases from the upper end to the lower end.

[0040] The first inner wall 11 of the sealing lip 1 is inclined, and the diameter of the annular surface formed by the upper end of the first inner wall 11 is smaller than the diameter of the annular surface formed by the lower end of the first inner wall 11, so that the inner part of the annular shape formed by the first inner wall 11 is in a frustum structure.

[0041] The lower end surface of the sealing lip 1 is a horizontal plane formed by connecting the lower ends of the first inner wall 11 and the first outer wall 12. The angle between the first outer wall 12 of the sealing lip 1 and the lower end surface of the sealing lip 1 is smaller than the angle between the first inner wall 11 of the sealing lip 1 and the lower end surface of the sealing lip 1.

[0042] The angle between the sealing lip 1 and the bent portion 2 faces the inner side of the seal body 4.

[0043] Furthermore, as Figure 4 shown, the second inner sidewall 21 of the bent portion 2 is an arc recessed away from the inner side of the seal body 4, the upper end of the arc is connected to the lower end of the first inner sidewall 11 of the seal lip 1, and the lower end of the arc is connected to one end of the upper end surface of the base 3 away from the inner side of the seal body 4.

[0044] The second outer sidewall of the bent portion 2 includes a first vertical section 22 and an inclined section 23, and the upper end of the inclined section 23 is connected to the lower end of the first vertical section 22.

[0045] The upper end of the first vertical section 22 is connected to the lower end of the first outer sidewall 12 of the seal lip 1, so that the angle between the first outer sidewall 12 and the first vertical section 22 is an obtuse angle, and the lower end of the inclined section 23 inclines towards the inner side of the seal, so that the angle between the first vertical section 22 and the inclined section 23 is an obtuse angle.

[0046] The upper end surface of the bent portion 2 is a horizontal plane that coincides with the lower end surface of the seal lip 1, and the lower end surface of the bent portion 2 is an inclined plane formed by connecting the lower end of the second inner sidewall 21 and the lower end of the inclined section 23.

[0047] The included angle between the bent portion 2 and the base 3 faces the outer side of the seal body 4.

[0048] Furthermore, as Figure 5 shown, the cross-section of the base 3 is an L-shaped structure, the upper end surface and the lower end surface of the base 3 are both horizontally arranged, and the lower end surface of the base 3 is longer than the upper end surface.

[0049] The third inner sidewall 31 of the base 3 is perpendicular to the upper end surface and the lower end surface of the base 3, and the diameters of the toroidal surfaces formed by the upper end and the lower end of the third inner sidewall 31 are the same, so that the inner part formed by the third inner sidewall 31 is a cylindrical structure.

[0050] The third outer sidewall of the base 3 includes an inclined plane that coincides with the lower end surface of the bent portion 2, an arc section 32, a horizontal section 33 and a second vertical section 34. The arc section 32 is an arc recessed towards the inner side of the seal body 4. The upper end of the arc section 32 is connected to the lower end of the inclined section 23, the lower end of the arc section 32 is connected to the inner side of the horizontal section 33, the outer side of the horizontal section 33 is vertically connected to the second vertical section 34 downward, and the lower end of the second vertical section 34 is closed with the outer side of the lower end surface of the base 3.

[0051] When the seal body 4 is installed and used, the initial sealing force P1 is provided by its own compressive deformation. Due to the internal and external pressure differences in the actual working conditions, the first inner wall 11 of the sealing lip 1 is the high-pressure side, providing the sealing pressure P2, and the inclined section 23 of the bent portion 2 is the low-pressure side, providing the sealing pressure P3. Therefore, in the actual working conditions, the sealing lip 1 provides the total sealing force P = P1 + P2 + P3. The sealing force generated by the seal body 4 not only depends on the modulus of its own material, but the ambient pressure compensates for the sealing force generated by the seal body 4, thereby further improving the sealing effect of the seal body 4.

[0052] The manufacturing process of this embodiment is as follows:

[0053] As Figure 6 shown, the seal body 4 is vulcanized and formed using a mold:

[0054] The mold is preheated for 30 minutes with the mold closed at 160°C. The cut semi-finished rubber strip is laid flat in the cavity between the lower mold 7 and the middle mold 6, the upper mold 5 is closed, and vulcanization is carried out. The vulcanization conditions are 160°C × 30 minutes, and the vulcanization pressure is 5 - 8 Mpa.

[0055] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the technical field to which the present invention belongs, based on the idea of the present invention, several simple deductions, deformations or substitutions can also be made.

Claims

1. A seal for an aircraft inspection cover, characterized in that: The invention comprises a sealing body (4), wherein the sealing body (4) is an annular structure, wherein the sealing body (4) comprises a sealing lip (1), a bent portion (2) and a base (3), wherein the sealing lip (1), the bent portion (2) and the base (3) are integrally arranged in sequence from top to bottom, wherein the cross-sections of the sealing lip (1), the bent portion (2) and the base (3) are S-shaped structures, wherein the diameter of the annular surface formed by the upper end of the sealing lip (1) is smaller than the diameter of the annular surface formed by the lower end of the sealing lip (1), wherein the angle between the sealing lip (1) and the bent portion (2) is toward the inside of the sealing body (4), and the angle between the bent portion (2) and the base (3) is toward the outside of the sealing body (4).

2. The seal for an aircraft inspection cover according to claim 1, characterized in that: The upper end surface of the sealing lip (1) is arranged inclined, and the diameter of the annular surface formed by the upper side of the upper end surface of the sealing lip (1) is larger than the diameter of the annular surface formed by the lower side of the upper end surface.

3. The seal for an aircraft inspection cover according to claim 1, characterized in that: The distance between the first inner wall (11) and the first outer wall (12) of the sealing lip (1) gradually increases from the upper end to the lower end.

4. The seal for an aircraft inspection cover according to claim 3, characterized in that: The lower end surface of the sealing lip (1) is a horizontal plane formed by connecting the lower end of the first inner wall (11) and the lower end of the first outer wall (12).

5. The seal for an aircraft inspection cover according to claim 4, characterized in that: The second inner side wall (21) of the bent portion (2) is in the shape of an arc that is recessed toward the inner side away from the sealing element body (4).

6. The seal for an aircraft inspection cover according to claim 5, characterized in that: The second outer side wall of the bent portion (2) comprises a first vertical section (22) and an inclined section (23), wherein the first vertical section (22) is connected to the lower end of the first outer side wall (12), and the inclined section (23) is connected to the lower end of the first vertical section (22).

7. The seal for an aircraft inspection cover according to claim 6, characterized in that: The lower end surface of the bent portion (2) is an inclined surface formed by connecting the lower end of the second inner side wall (21) and the lower end of the inclined section (23).

8. The seal for an aircraft inspection cover according to claim 1, characterized in that: The cross section of the base (3) is an L-shaped structure, and the upper end surface and the lower end surface of the base (3) are both arranged horizontally.

9. The seal for an aircraft inspection cover according to claim 1, characterized in that: The third inner side wall (31) of the base (3) is perpendicular to the upper end surface and the lower end surface of the base (3), and the diameter of the annular surface formed by the upper end of the third inner side wall (31) is consistent with the diameter of the annular surface formed by the lower end.

10. The seal for an aircraft inspection cover according to claim 6, characterized in that: The third outer side wall of the base (3) comprises an inclined surface coincident with the lower end surface of the bent portion (2), an arc segment (32), a horizontal segment (33) and a second vertical segment (34), wherein the arc segment (32) is connected to the lower end of the inclined segment (23), the horizontal segment (33) is connected to the lower end of the arc segment (32), and the second vertical segment (34) is connected to and perpendicular to the horizontal segment (33).

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