Air-watertight guide device for operating steel cable, installation method thereof and aircraft

Abstract

The present invention provides an air-watertight guide device for controlling a steel cable, an installation method thereof, and an aircraft. The device comprises a box assembly and a seal. A fitting surface for tightly fitting with the surface of an aircraft shell is provided on the first side of the box assembly. A mounting wall is provided on the box assembly away from the first side. The mounting wall is a plane wall, and a mounting hole is provided on the mounting wall. The seal is made of elastic material. The seal is provided with a sealing accommodating groove for accommodating the steel cable. The sealing accommodating groove penetrates the seal along the axial direction of the seal. A clamping groove is provided on the seal. The clamping groove extends from the outer peripheral wall of the seal toward the sealing accommodating groove along the radial direction of the seal. The inner peripheral wall of the mounting hole is located in the clamping groove. An edge portion is provided on the first side of the box assembly. The edge portion extends outward from the outer peripheral wall of the box assembly. The fitting surface is located on the edge portion. The edge portion is a plane wall or a curved wall. The present invention can ensure that the steel cable can normally control the rudder surface while ensuring its sealing performance, and is easy to disassemble and maintain.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft control system design, and in particular relates to an air-watertight guide device for a control cable, an installation method thereof, and an aircraft. Background Art

[0002] The flight control system of an aircraft generally uses steel cables to enable the pilot to control the aircraft's control surfaces, thereby controlling the aircraft's attitude. When the control cables pass through the aircraft's pressurized cabin or watertight cabin, it is often necessary to make holes in the structure to ensure that they pass smoothly and do not interfere with the structure, thus destroying the sealed structure of the pressurized cabin or watertight cabin. In addition, the outer shell of the aircraft's pressurized cabin and watertight cabin generally adopts a curved surface design to facilitate force bearing. Therefore, it is necessary to design a device that can satisfy the requirements of the control system's steel cables passing through the pressurized cabin or watertight cabin, which can not only control the aircraft's control surfaces, but also ensure its air tightness and liquid sealing performance.

[0003] An existing aircraft control cable sealing device includes a sealing ball and a shell. The sealing ball includes two hemispheres with a hole for the cable to pass through. The shell includes two parts, the inner surface of which matches the sealing sphere surface and is connected by an adjustment bolt. However, the two hemisphere seals of this solution seal the cable only by aligning the shell, resulting in poor sealing performance and inconvenience in assembly and disassembly. Summary of the invention

[0004] The first object of the present invention is to provide an air- and water-tight guide device for operating a steel cable which is easy to install and can ensure the air- and water-tight performance of the steel cable.

[0005] A second object of the present invention is to provide an aircraft comprising the above-mentioned air- and water-tight guide device for controlling the steel cable.

[0006] The third object of the present invention is to provide a method for installing an air- and water-tight guide device for the above-mentioned control cable.

[0007] In order to achieve the above-mentioned first purpose, the air-watertight guide device for the control cable provided by the present invention includes a box body assembly and a sealing member, a first side of the box body assembly is provided with a fitting surface, the fitting surface is used to tightly fit and seal with the surface of the aircraft shell, a mounting wall is provided on the box body assembly away from the first side, the mounting wall is a plane wall, and a mounting hole is provided on the mounting wall; the sealing member is made of elastic material, and the sealing member is provided with a sealing accommodating groove for accommodating the control cable, the sealing accommodating groove penetrates the sealing member along the axial direction of the sealing member, and a clamping groove is provided on the sealing member, and the clamping groove extends from the outer peripheral wall of the sealing member toward the sealing accommodating groove along the radial direction of the sealing member, and the inner peripheral wall of the mounting hole is located in the clamping groove.

[0008] As can be seen from the above, the box assembly is sealed with the outer shell of the aircraft through the provided fitting surface, thereby ensuring its airtightness and liquid-tightness. The seal is made of elastic material, which facilitates the assembly of the seal and the mounting hole, and can also ensure its sealing performance through interference fit.

[0009] A further solution is that an edge portion is provided on the first side of the box body assembly, the edge portion extends outward from the outer peripheral wall of the box body assembly, and the fitting surface is located on the edge portion; the edge portion is a plane wall or a curved wall.

[0010] As can be seen from the above, the provided edge portion can effectively increase the installation area of ​​the box assembly, making it convenient to install the box assembly on the aircraft. At the same time, it can also increase the sealing area and improve the sealing effect. It can also be designed to fit the curved surface or flat surface according to the shape of the aircraft shell, and is compatible with a variety of aircraft.

[0011] A further solution is that the box body assembly includes a box body, a first sealing gasket and a connecting plate, the mounting wall is located on the connecting plate, the box body includes a limiting wall, the limiting wall is provided with an opening, the connecting plate covers the opening and is fixedly connected to the limiting wall, and the first sealing gasket is squeezed between the connecting plate and the limiting wall.

[0012] As can be seen from the above, the connecting plate provided will flatten the curved surface of the pressurized cabin or the watertight cabin, thereby facilitating the installation of the seal, while ensuring the sealing effect of the seal and the connecting plate. The connecting plate, the first sealing gasket and the limit wall are disassembled and assembled together, which is convenient for disassembly, assembly and maintenance.

[0013] A further solution is that the connecting plate, the first sealing gasket and the limiting wall are detachably connected via a fastener; and a locking piece cooperating with the fastener is provided on a side of the limiting wall away from the first sealing gasket.

[0014] It can be seen from the above that the provided fasteners and locking members can effectively ensure the firmness of the installation.

[0015] A further solution is that the slot has a slot peripheral wall; the diameter of the mounting hole is smaller than or equal to the diameter of the slot peripheral wall; and / or the width of the slot is smaller than or equal to the thickness of the mounting wall.

[0016] As can be seen from the above, the diameter of the mounting hole is less than or equal to the diameter of the peripheral wall of the slot, so that the mounting hole and the peripheral wall of the slot have an interference fit, thereby achieving a sealing effect in the radial direction of the seal. At the same time, the width of the slot is less than or equal to the thickness of the mounting wall, so that the mounting wall and the opposite side walls of the slot have an interference fit, thereby achieving a sealing effect in the axial direction of the seal.

[0017] A further solution is that an assembly gap is provided on the seal, the assembly gap penetrates the seal along the axial direction of the seal, the assembly gap extends along the radial direction of the seal to the seal accommodating groove, and the assembly gap is connected with the seal accommodating groove; a clamping member is installed on the seal, the clamping member is sleeved outside the seal, and the clamping member is used to clamp the seal on the operating cable.

[0018] As can be seen from the above, the assembly gap can be clamped by the provided clamping member, thereby improving the sealing performance of the seal to the control cable and facilitating disassembly and replacement.

[0019] A further solution is that a clamping groove is further provided on the sealing member, the clamping groove is recessed inwardly from the outer peripheral wall of the sealing member along the radial direction of the sealing member, and the clamping member is located in the clamping groove.

[0020] As can be seen from the above, the provided clamping groove facilitates the positioning and assembly of the clamping member and prevents deviation.

[0021] A further solution is that the number of the clamping grooves is more than two, at least one clamping groove is respectively provided on both sides of the connecting plate, and the clamping grooves are arranged at intervals along the axial direction of the sealing member.

[0022] As can be seen from the above, at least one clamping groove is respectively provided on both sides of the connecting plate, so that the clamping members on both sides of the connecting plate are distributed more evenly, thereby improving the sealing effect of the sealing member.

[0023] In order to achieve the above second object, the present invention provides an aircraft comprising any one of the above-mentioned air- and water-tight guide devices for operating a steel cable, wherein the contact surface is tightly contacted and sealed with the surface of the aircraft shell.

[0024] In order to achieve the third object, the present invention provides a method for installing an air-watertight guide device for any one of the above-mentioned control cables, the method comprising the following steps:

[0025] Step 1: The box is installed on the aircraft shell;

[0026] Step 2: The sealing member is mounted on the control cable;

[0027] Step 3: Connect the connecting plate and the sealing member by means of the mounting holes;

[0028] Step 4: Fix the connecting plate, the first sealing gasket and the limiting wall by fasteners.

[0029] As can be seen from the above, the installation method of the air-watertight device for operating the steel cable of the present invention is simple and convenient, and is easy to disassemble, assemble and maintain.

[0030] In summary, it can be seen that the air-watertight device of the control cable of the present invention can ensure that the control cable can normally control the rudder surface while effectively ensuring its sealing performance, and is convenient for disassembly, assembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of an embodiment of an air-watertight guide device for operating a steel cable according to the present invention.

[0032] Figure 2 It is an exploded view of an embodiment of the air-watertight guide device for operating a steel cable according to the present invention.

[0033] Figure 3 It is an exploded view of the sealing assembly of an embodiment of the air-watertight guide device for operating a steel cable of the present invention.

[0034] Figure 4 It is a cross-sectional view of an embodiment of the air-watertight guide device for operating a steel cable according to the present invention. DETAILED DESCRIPTION

[0035] See also Figures 1 to 4 The air-watertight guide device for controlling the steel cable provided in this embodiment comprises a box assembly 1 and a seal 10, wherein the box assembly 1 comprises a box body 2, a first sealing pad 7 and a connecting plate 8. The box body 2 can accommodate part of the seal 10, and a first side of the box body 2 is provided with an edge portion 3, which extends outward from the outer peripheral wall of the box body 2, and a fitting surface 4 for fitting with the aircraft shell is provided on the edge portion 3. The edge portion 3 is a plane wall or a curved wall, and is used to fit the surface of the aircraft pressurized cabin and the watertight cabin shell according to design requirements and seal the two. The box body 2 and the surface of the aircraft shell can be sealed and fixed by existing methods such as gluing, welding and fastener 16 connection.

[0036] A limiting wall 5 is provided on the first side of the box body 2 away from the box body 2, an opening 6 is provided on the limiting wall 5, a avoidance opening 18 corresponding to the opening 6 is provided on the first sealing gasket 7, a connecting plate 8 covers the opening 6 and is fixedly connected to the limiting wall 5, a mounting wall is provided on the connecting plate 8, and the first sealing gasket 7 is squeezed between the connecting plate 8 and the limiting wall 5. The mounting wall is a plane wall, and a mounting hole 9 is provided on the mounting wall. The connecting plate 8, the first sealing gasket 7 and the limiting wall 5 are detachably connected by a fastener 16, and a locking member 17 for cooperating with the fastener 16 is provided on the side of the limiting wall 5 away from the first sealing gasket 7. Preferably, the locking member 17 is an airtight support plate nut, which can further improve the sealing performance of the device.

[0037] The seal 10 is made of elastic material, including silicone or rubber or silicone rubber. The seal 10 is provided with a seal receiving groove 11 for accommodating the control cable. The seal receiving groove 11 penetrates the seal 10 along the axial direction of the seal 10. The seal 10 is provided with a clamping groove 12. The clamping groove 12 extends along the outer peripheral wall of the seal 10 toward the seal receiving groove 11. The groove wall of the seal receiving groove 11 has a plurality of serrations 19 that abut against the control cable. The serrations 19 can be a serration ring extending along the circumference of the seal receiving groove 11 or a serration protrusion arranged along the circumference of the seal receiving groove 11. The plurality of serrations 19 extend along the axial direction of the seal receiving groove 11. In this way, the serrations 19 provided can ensure the sealing performance of the seal receiving groove 11 while reducing the friction between the seal and the control cable to a certain extent, so as to facilitate the movement of the control cable. The inner peripheral wall of the mounting hole 9 is located in the clamping groove 12. The card slot 12 has a peripheral wall of the card slot 12 , the diameter of the mounting hole 9 is smaller than the diameter of the peripheral wall of the card slot 12 , and the width of the card slot 12 is smaller than the thickness of the mounting wall.

[0038] Optionally, the diameter of the mounting hole 9 may be equal to the diameter of the peripheral wall of the slot 12. The width of the slot 12 may also be equal to the thickness of the mounting wall.

[0039] The seal 10 is provided with an assembly gap 13, which penetrates the seal 10 along the axial direction of the seal 10, extends to the seal receiving groove 11 along the radial direction of the seal 10, and is communicated with the seal receiving groove 11. One assembly gap 13 can effectively ensure the stability of its overall structure and ensure its sealing effect. Optionally, there can be more than two assembly gaps 13.

[0040] The seal 10 is provided with a clamping member 14 and three clamping grooves 15. Each clamping groove 15 is recessed inward from the outer peripheral wall of the seal 10 along the radial direction of the seal 10. The clamping member 14 is sleeved outside the seal 10 and located in the clamping groove 15. The seal 10 is deformed, thereby improving the sealing effect between the seal 10 and the control cable. The clamping grooves 15 are provided on both sides of the connecting plate 8, two of which are located on the side of the connecting plate 8 away from the limiting wall 5, and the three clamping grooves 15 are arranged at intervals along the axial direction of the seal 10.

[0041] Optionally, the clamping groove 15 may not be provided. The number of the clamping grooves 12 may be more than two, so that the connecting plate 8 can be clamped at different positions of the sealing member 10 according to requirements.

[0042] An optional solution is to further include a second sealing pad (not shown in the figure), which is squeezed between the fitting surface 4 and the aircraft shell. The first sealing pad 7 and the second sealing pad are both made of elastic materials such as silicone, rubber or silicone rubber.

[0043] The present invention also provides a method for installing the air-watertight guide device of the control cable, the method comprising:

[0044] Step 1: The box body 2 is mounted on the bulkhead of the pressurized cabin or watertight cabin of the aircraft and sealed by welding, gluing or fixing with fasteners 16.

[0045] Step 2: Open the seal 10 through the assembly gap 13 and put the seal 10 onto the operating cable.

[0046] Step 3: The connecting plate 8 is engaged with the sealing member 10 through the mounting hole 9 on the connecting plate 8, and the clamping member 14 is installed in the clamping groove 15 on the sealing member 10 located on the side of the connecting plate 8 close to the limiting wall 5. Optionally, if the clamping groove 15 is not provided on the side of the connecting plate 8 close to the limiting wall 5 on the sealing member 10, the step of installing the clamping member 14 can be omitted.

[0047] Step 4: Fix the connecting plate 8 , the first sealing gasket 7 and the limiting wall 5 by means of the fasteners 16 .

[0048] Step 5: Install the clamping member 14 into the corresponding clamping groove 15 on the sealing member 10 .

[0049] In summary, the air-watertight guide device for controlling the steel cable provided by the present invention has a simple structure, good airtightness, and can be used in a variety of aircraft.

[0050] The above-described embodiments are only preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. An air-watertight guide device for operating the steel cable, characterized in that ,include: A box body assembly, wherein a first side of the box body assembly is provided with a fitting surface, wherein the fitting surface is used to closely fit and seal with the surface of the aircraft shell, and a mounting wall is provided on the box body assembly away from the first side, wherein the mounting wall is a plane wall, and a mounting hole is provided on the mounting wall: A sealing member, wherein the sealing member is made of an elastic material, and is provided with a sealing receiving groove for receiving the control cable, wherein the sealing receiving groove penetrates the sealing member along the axial direction of the sealing member, and a clamping groove is provided on the sealing member, wherein the clamping groove extends from the outer peripheral wall of the sealing member toward the sealing receiving groove along the radial direction of the sealing member, and the inner peripheral wall of the mounting hole is located in the clamping groove; The sealing member is provided with an assembly gap, the assembly gap penetrates the sealing member along the axial direction of the sealing member, the assembly gap extends to the sealing accommodating groove along the radial direction of the sealing member, and the assembly gap is communicated with the sealing accommodating groove; A clamping piece is installed on the sealing piece, and the clamping piece is sleeved outside the sealing piece. The clamping piece is used to clamp the sealing piece on the operating cable.

2. The air-watertight guide device for operating a steel cable according to claim 1, characterized in that: The first side of the box body assembly is provided with an edge portion, the edge portion extends outward from the outer peripheral wall of the box body assembly, and the fitting surface is located on the edge portion; The edge portion is a plane wall or a curved wall.

3. The air-watertight guide device for operating a steel cable according to claim 1, characterized in that: The box body assembly includes a box body, a first sealing gasket and a connecting plate, the mounting wall is located on the connecting plate, the box body includes a limiting wall, the limiting wall is provided with an opening, the connecting plate covers the opening and is fixedly connected to the limiting wall, and the first sealing gasket is squeezed between the connecting plate and the limiting wall.

4. The air-watertight guide device for operating a steel cable according to claim 3, characterized in that: The connecting plate, the first sealing gasket and the limiting wall are detachably connected via fasteners; A locking piece matched with the fastener is arranged on a side of the limiting wall away from the first sealing gasket.

5. The air-watertight guide device for the control cable according to claim 3 or 4, characterized in that: The sealing member is also provided with a clamping groove, which is recessed inwardly from the outer peripheral wall of the sealing member along the radial direction of the sealing member, and the clamping member is located in the clamping groove.

6. The air-watertight guide device for operating a steel cable according to claim 5, characterized in that: The number of the clamping grooves is more than two, at least one clamping groove is respectively provided on both sides of the connecting plate, and the clamping grooves are arranged at intervals along the axial direction of the sealing member.

7. The air-watertight guide device for operating a steel cable according to any one of claims 1 to 4, characterized in that: The card slot has a card slot peripheral wall; The diameter of the mounting hole is smaller than or equal to the diameter of the peripheral wall of the slot; and / or The width of the slot is less than or equal to the thickness of the installation wall.

8. An aircraft, characterized in that The invention comprises an aircraft shell and an air-watertight guide device for operating a steel cable as claimed in any one of claims 1 to 7, wherein the fitting surface is tightly fitted and sealed to the surface of the aircraft shell.

9. A method for installing an air- and water-tight guide device for operating a steel cable, characterized in that: The air-watertight guide device for manipulating a steel cable as claimed in any one of claims 4 to 6, wherein the installation method comprises the following steps: Step 1: The box body is installed on the bulkhead of the pressurized cabin or watertight cabin of the aircraft; Step 2: The sealing member is sleeved onto the control cable; Step 3: snap-fit ​​the connecting plate and the sealing member through the mounting hole; Step 4: Fix the connecting plate, the first sealing gasket and the limiting wall by fasteners.

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