High-pressure glue injection leak repair device and leak repair method for aircraft fuel tank structure oil leakage

Abstract

The invention discloses a high-pressure glue injection leak repairing device and a leak repairing method for an aircraft fuel tank structure leaking oil. The invention utilizes a suction cup in a glue injection positioning component to accurately position a rotating glue injection component at a nail hole of the fuel tank structure leaking oil. For a single-sided detachable bolt leakage structure, a sealing bolt is used to complete the sealing of a nut hole of an earless support plate to prevent glue from entering the interior of the fuel tank. A spiral pressurization method is used to inject glue into the gap between the nail holes of the leaking oil and the failed glue layer bonding surface of the screw adjacent structure at high pressure. For a single-sided non-detachable bolt leakage structure, a spiral pressurization method is used to inject glue into the gap between the nail holes of the leaking oil and the failed glue layer bonding surface of the screw adjacent structure at high pressure, fully compensating for the failed sealing glue layer structure, and effectively ensuring the sealing quality of the overall fuel tank of the aircraft after leak repair. The leak repairing structure is integrated, simple to process, and efficient and convenient to use.

Description

Technical Field

[0001] The invention belongs to the technical field of repairing oil tank seal failure, and relates to a high-pressure glue injection leak repairing device and a leak repairing method for oil leakage in an aircraft oil tank structure. Background Art

[0002] In order to reduce weight and increase range to the greatest extent, modern aircraft use a large number of integral fuel tank structures, make full use of aircraft bodies, wings and other structures, use high-performance sealants, and form oil-tight cavities through sealing connection technology. However, due to the influence of changes in environmental temperature and humidity and alternating loads during flight, the integral fuel tank structure is prone to failure forms such as sealant aging, stress damage and thinning of the adhesive layer, which in turn causes fuel leakage. There are two specific situations: one is leakage from the periphery of the screw socket; the other is leakage from the fitting surface of the structure adjacent to the screw. This leakage phenomenon mainly occurs at the fitting surface of the structure at the junction of the fuel tank area and the non-fuel tank area. When the fuel enters the non-fuel tank area, it seriously affects flight safety. The above fuel leakage phenomenon is a common fault in military and civilian aircraft of various countries, and it is also a problem that troubles maintenance personnel in being unable to quickly and efficiently repair leaks.

[0003] Especially for large-sized integral skins, when the skin and the frame, beam and other fitting surfaces of the internal structure fail to seal in the local area or the connecting screws, fuel leakage occurs. In order to ensure the sealing of the overall fuel tank, it is impossible to disassemble all the connectors of the entire skin and re-seal the parts. The only way to seal the leaking parts is to inject glue locally. Since the aircraft surface is relatively smooth and there is a lack of reliable fixing methods, manual injection of glue is currently used for leak repair. Although this method is more flexible, it lacks sufficient pressure, especially when there is local leakage on the fitting surface and fuel leakage occurs on the screws that cannot be disassembled on one side, the existing pressure-free manual injection of glue to repair leaks is difficult to meet the repair needs. Multiple repairs and repeated leakage are common, resulting in a large waste of labor and construction cycle costs.

[0004] Therefore, it is urgent to innovate a high-pressure glue injection leak repair device and method to quickly solve the sealing leak repair technology that occurs in the fitting surface of the fuel tank structure and the screw sockets on the outer surface, which can not only ensure the sealing quality of the overall fuel tank leak repair of the aircraft, but also ensure the flight safety of the aircraft. Summary of the invention

[0005] The purpose of the present invention is to provide a high-pressure glue injection leak repair device and a leak repair method for aircraft fuel tank structure oil leakage, which can quickly seal and repair leaks occurring at the fitting surface of the fuel tank structure and the screw holes on the outer surface, thereby ensuring the sealing quality of the overall fuel tank leak repair of the aircraft and ensuring the flight safety of the aircraft.

[0006] The present invention is achieved through the following technical solutions:

[0007] A high-pressure glue injection and leak repair device for oil leakage in aircraft fuel tank structures includes a rotating glue injection component, at least one group of glue injection positioning components are arranged around the rotating glue injection component, the glue injection positioning component can move in a direction close to or away from the rotating glue injection component, and the glue injection positioning component includes at least one adsorption end, which adsorbs and fixes the fuel tank structure to position and fix the rotating glue injection component.

[0008] In order to better realize the present invention, further, the glue injection positioning assembly includes a mounting beam, a suction cup, and a negative pressure generator. A rotating glue injection assembly is arranged at the center of the mounting beam. At least one group of suction cups is slidingly arranged around the rotating glue injection assembly on the mounting beam. The suction cups are connected to the negative pressure generator, and a valve switch is arranged on the negative pressure generator.

[0009] In order to better implement the present invention, further, a keyway facing the rotating glue injection assembly is provided on the mounting beam, and a positioning bolt is provided on the top thread of the suction cup for rotation, and the positioning bolt passes through the keyway and slides along the keyway.

[0010] In order to better implement the present invention, further, a suction cup joint is provided on one side of the suction cup, and the suction cup joint is connected to the negative pressure generator through a pipe joint.

[0011] In order to better realize the present invention, further, the rotating glue injection assembly includes a glue injection cylinder, a feed drive, and a feed piston. The glue injection cylinder is provided with a feed piston for sliding inside. One end of the glue injection cylinder is provided with a glue injection port. The other end of the glue injection cylinder is provided with a feed drive extending into the interior of the glue injection cylinder. The driving end of the feed drive is connected to one end of the feed piston to drive the feed piston to slide inside the glue injection cylinder.

[0012] In order to better realize the present invention, further, the feed drive component includes a feed screw and a locking nut. The locking nut is installed at one end of the glue injection cylinder. The feed screw is threadedly installed in the threaded hole of the locking nut. One end of the feed screw extends to the interior of the glue injection cylinder and is rotatably engaged with one end of the feed piston.

[0013] In order to better implement the present invention, further, a sealing rubber pad is provided at the glue injection port of the glue injection cylinder.

[0014] A method for repairing oil leakage in an aircraft fuel tank structure by high pressure glue injection comprises the following steps:

[0015] Step 1, check the leaking part, and divide the leaking part into a single-side removable bolt leakage structure and a single-side non-removable bolt leakage structure. For the single-side removable bolt leakage structure, proceed to step 2, and for the single-side non-removable bolt leakage structure, proceed to step 3;

[0016] Step 2, remove the single-sided detachable bolt inside the screw hole, and then install a plugging bolt in the screw hole, and use the plugging bolt to plug the end of the screw hole close to the inside of the oil tank; then use the glue injection positioning component to position and fix the rotating glue injection component so that the glue injection end of the rotating glue injection component is aligned with the screw hole, and the screw hole is injected with glue to repair the leak;

[0017] Step 3: Then, the rotating glue injection component is positioned and fixed by the glue injection positioning component so that the glue injection end of the rotating glue injection component is aligned with the screw hole, and the screw hole is injected with glue to fill the leak by the rotating glue injection component.

[0018] In order to better implement the present invention, further, the step 2 specifically includes:

[0019] Step 2.1, remove the single-sided detachable bolt inside the screw hole, and remove the leaking sealant at the joint surface between the inner skin and the internal frame of the screw hole;

[0020] Step 2.2, screw the plugging bolt into the screw hole so that the plugging bolt blocks the end of the screw hole close to the fuel tank, and reserve a glue injection space between the plugging bolt and the skin;

[0021] Step 2.3, positioning and fixing the rotating glue injection component by means of the glue injection positioning component, so that the glue injection end of the rotating glue injection component is aligned with the screw hole, and the screw hole is injected with glue to fill the leak by means of the rotating glue injection component;

[0022] Step 2.4: After the glue is injected between the skin and the inner frame of the skin, remove the sealing bolts and the rotating glue injection assembly in turn, and re-screw the single-sided detachable bolts into the screw holes.

[0023] In order to better implement the present invention, further, the step 3 specifically includes:

[0024] Step 3.1, remove the leaking sealant at the joint surface between the inner skin of the screw hole and the inner frame;

[0025] Step 3.2, positioning and fixing the rotating glue injection component by means of the glue injection positioning component, so that the glue injection end of the rotating glue injection component is aligned with the screw hole, and the screw hole is injected with glue to fill the leak by means of the rotating glue injection component;

[0026] Step 3.3: After the glue is injected into the gap around the screw hole, remove the rotating glue injection assembly.

[0027] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0028] The present invention utilizes the suction cup in the glue injection positioning component to accurately position the rotating glue injection component at the nail hole of the oil tank structure leaking oil. For the single-sided detachable bolt leakage structure, a sealing bolt is used to complete the sealing of the earless support plate nut hole to prevent the glue from entering the interior of the oil tank. The glue is injected into the gap between the nail hole of the leaking oil and the failed glue layer bonding surface of the screw adjacent structure with high pressure by means of spiral pressurization. For the single-sided non-detachable bolt leakage structure, the glue is injected into the gap between the nail hole of the leaking oil and the failed glue layer bonding surface of the screw adjacent structure with high pressure by means of spiral pressurization, which fully compensates for the failed sealing glue layer structure and effectively ensures the sealing quality of the overall aircraft oil tank after the leak repair. The leak repair structure is integrated, the processing is simple, and the use is efficient and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a glue injection leak repairing device;

[0030] Figure 2 It is an isometric biaxial schematic diagram of the glue injection leak repairing device;

[0031] Figure 3 A schematic diagram of the injection positioning assembly;

[0032] Figure 4 It is a schematic diagram of a rotary glue injection assembly;

[0033] Figure 5 This is a schematic diagram of the installation of the feed screw;

[0034] Figure 6 It is a schematic diagram of the internal structure of the rotary glue injection component;

[0035] Figure 7 It is a schematic diagram of a single-sided removable bolt leakage structure;

[0036] Figure 8 It is a schematic diagram of a single-sided non-detachable bolt leakage structure;

[0037] Fig. 9 It is a schematic diagram of the installation of the glue injection leak repair device on the oil tank structure;

[0038] Fig.10 A schematic diagram of plugging a leak in a one-sided removable bolt leakage structure;

[0039] Fig.11 A schematic diagram showing the completion of plugging a leak in a single-sided removable bolted structure;

[0040] Fig.12 A schematic diagram of plugging a leak in a single-sided non-detachable bolt leakage structure;

[0041] Fig.13 This is a schematic diagram showing the completion of plugging a leak in a structure with non-detachable bolts on one side;

[0042] Fig.14 A schematic diagram of a process for plugging a leaking structure with a single-sided detachable bolt;

[0043] Fig.15 The present invention is a schematic diagram of the process of plugging a leak in a structure with single-sided non-detachable bolts.

[0044] Among them: 100-glue injection positioning assembly, 101-mounting beam, 102-suction cup, 103-positioning bolt, 104-suction cup joint, 105-pipe joint, 106-negative pressure generator, 107-valve switch, 108-trachea joint, 109-trachea, 200-rotary glue injection assembly, 201-rotary handle, 202-feed screw, 203-upper locking nut, 204-lower locking nut, 205-glue injection cylinder, 206-sealing rubber pad, 207-feed piston, 208-sealing rubber ring, 300-tank structure, 301-upper skin, 302-complete rubber layer, 303-lower skeleton structure, 304-sealing bolt, 305-damaged rubber layer, 306-single-sided removable bolt, 307-earless support plate nut, 308-single-sided non-removable bolt, 309-internal nut. DETAILED DESCRIPTION

[0045] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the present invention explicitly states otherwise, singular forms are also intended to include plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0048] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0049] Embodiment 1:

[0050] The high pressure glue injection leak repair device for oil leakage in aircraft fuel tank structure of this embodiment is as follows: Figure 1 , Figure 2 , Fig. 9 As shown, it includes a rotating glue injection component 200, and at least one group of glue injection positioning components 100 are arranged around the rotating glue injection component 200. The glue injection positioning component 100 can move in a direction close to or away from the rotating glue injection component 200. The glue injection positioning component 100 includes at least one adsorption end, and the adsorption end adsorbs and fixes the oil tank structure to position and fix the rotating glue injection component 200.

[0051] Move the glue injection positioning component 100 towards or away from the rotating glue injection component 200 to adjust the distance between the glue injection positioning component 100 and the rotating glue injection component 200, to ensure that after the glue injection positioning component 100 is sucked and fixed to the tank skin, the glue injection end of the rotating glue injection component 200 can be aligned with the screw hole to be repaired on the skin, to ensure that the sealant squeezed out of the rotating glue injection component 200 can enter the screw hole, to avoid a large amount of sealant residue on the skin.

[0052] Embodiment 2:

[0053] A high pressure glue injection leak repair device for oil leakage in aircraft fuel tank structure is improved on the basis of Example 1, such as Figure 3 As shown, the glue injection positioning assembly 100 includes a mounting beam 101, a suction cup 102, and a negative pressure generator 106. A rotating glue injection assembly 200 is arranged at the center of the mounting beam 101. At least one group of suction cups 102 are slidably arranged on the mounting beam 101 around the rotating glue injection assembly 200. The suction cups 102 are connected to the negative pressure generator 106, and a valve switch 107 is arranged on the negative pressure generator 106.

[0054] A mounting hole is provided at the center of the mounting beam 101, in which a rotating glue injection assembly 200 is positioned and installed. Two groups of suction cups 102 are symmetrically and slidably provided on the mounting beam 101 on the left and right sides of the rotating glue injection assembly 200. The two groups of suction cups 102 can move toward or away from the rotating glue injection assembly 200, thereby adjusting the installation adsorption position of the mounting beam 101 on the fuel tank skin, and ensuring that the injection end of the rotating glue injection assembly 200 can align with the screw hole to be plugged. After the suction cup 102 moves into place, the negative pressure generator 106 and the valve switch 107 can be turned on, and the air between the suction cup 102 and the fuel tank skin is sucked by the negative pressure generator 106 to form a vacuum, so that the suction cup 102 is firmly adsorbed on the fuel tank skin, thereby ensuring the stability of the subsequent injection of glue to the screw hole through the rotating glue injection assembly 200.

[0055] Furthermore, the mounting beam 101 is provided with a keyway facing the rotating glue injection assembly 200, and the top thread of the suction cup 102 is provided with a positioning bolt 103, which passes through the keyway and slides along the keyway. The top of the base of the suction cup 102 is provided with a threaded hole, and the positioning bolt 103 is threadedly installed in the threaded hole. The positioning bolt 103 passes through the keyway and slides along the keyway to drive the suction cup 102 to move closer to or away from the rotating glue injection assembly 200. When the suction cup 102 is moved into place, the positioning bolt 103 is rotated so that the positioning bolt 103 presses the top end surface of the keyway, thereby fixing the position of the suction cup 102.

[0056] Furthermore, a suction cup joint 104 is provided on one side of the suction cup 102, and the suction cup joint 104 is connected to the negative pressure generator 106 through a pipe joint 105. A suction cup joint 104 is provided on one side of the two suction cups 102 on the left and right sides of the mounting beam 101, and the suction cup joints 104 on the left and right sides are connected to the pipe joint 105 through an air pipe 109, where the pipe joint 105 uses a three-way joint. The suction end of the pipe joint 105 is connected to the negative pressure generator 106, and the exhaust end of the negative pressure generator 106 is connected to the valve switch 107, and the exhaust end of the valve switch 107 is connected to the air pipe joint 108 to connect to the external vacuum suction pipeline.

[0057] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0058] Embodiment 3:

[0059] A high pressure glue injection leak repair device for oil leakage in aircraft fuel tank structure, improved on the basis of embodiment 1 or 2, such as Figure 4-Figure 6As shown, the rotating glue injection assembly 200 includes a glue injection cylinder 205, a feed drive, and a feed piston 207. The feed piston 207 is slidably arranged inside the glue injection cylinder 205. A glue injection port is arranged at one end of the glue injection cylinder 205. A feed drive extending into the interior of the glue injection cylinder 205 is arranged at the other end of the glue injection cylinder 205. The driving end of the feed drive is connected to one end of the feed piston 207 to drive the feed piston 207 to slide inside the glue injection cylinder 205.

[0060] The rotating glue injection assembly 200 includes a rotating handle 201, a feed screw 202, an upper locking nut 203, a lower locking nut 204, a glue injection barrel 205, a sealing rubber pad 206, a feed piston 207, and a sealing rubber ring 208. During the manual high-pressure glue injection process, an annular groove is opened on the outer side of the feed piston 207, and the sealing rubber ring 208 is embedded in the annular groove. A rectangular groove is opened at one end of the feed piston 207, and one end of the feed screw 202 is rotatably engaged with the rectangular groove. The sealing rubber pad 206 is installed in the annular groove at the lower end of the glue injection barrel 205 and has a certain extension amount, the purpose is to prevent the lower surface of the glue injection barrel 205 from crushing the surface of the oil tank structure 300, and at the same time prevent the sealant inside the glue injection barrel 205 from overflowing from the contact surface between the glue injection barrel 205 and the oil tank structure 300 under the action of pressure. The upper end surface of the glue injection cylinder 205 has threads on the outside, and is fixed to the mounting beam 101 through the upper locking nut 203 and the lower locking nut 204. The upper locking nut 203 has internal threads on the top, and the feed screw 202 can move along the screw axis to push the feed piston 207 to move. The sealing rubber ring 208 ensures the airtightness of the inner cavity of the rotating glue injection assembly 200, and then under the action of the high pressure of the rotating handle 201, the sealing glue liquid is injected into the leaking structural fitting surface, or the sealing glue liquid is injected into the gap between the screw head and the screw socket, so as to achieve the sealing of the leaking part.

[0061] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0062] Embodiment 4:

[0063] A method for repairing oil leakage in an aircraft fuel tank structure by high pressure glue injection comprises the following steps:

[0064] Step 1, check the leaking part, and divide the leaking part into a single-side removable bolt leakage structure and a single-side non-removable bolt leakage structure. For the single-side removable bolt leakage structure, proceed to step 2, and for the single-side non-removable bolt leakage structure, proceed to step 3;

[0065] Step 2, remove the single-sided detachable bolt inside the screw hole, and then install the plugging bolt 304 in the screw hole, and use the plugging bolt 304 to plug the end of the screw hole close to the inside of the oil tank; then use the glue injection positioning component 100 to position and fix the rotating glue injection component 200, so that the glue injection end of the rotating glue injection component 200 is aligned with the screw hole, and the screw hole is injected with glue to repair the leak;

[0066] Step 3: Then, the rotating glue injection component 200 is positioned and fixed by the glue injection positioning component 100 so that the glue injection end of the rotating glue injection component 200 is aligned with the screw hole, and the screw hole is injected with glue to repair the leak by the rotating glue injection component 200.

[0067] There are two types of bolt connection structures in the aircraft fuel tank structure after assembly. One type is as follows: Figure 7 The structure of the removable single-sided bolt shown in FIG. 1 is connected by a single-sided removable bolt 306 and an earless support plate nut 307. This type of structure can realize the single-sided removal of the single-sided removable bolt 306 on the outer surface of the skin; another type is as shown in FIG. Figure 8 The non-removable bolt structure shown is connected by a single-sided non-removable bolt 308 and an internal nut 309. Since the internal nut 309 is located inside the oil tank structure, the single-sided non-removable bolt 308 cannot be removed from the outside.

[0068] For the leakage structure of the single-sided detachable bolt, that is, for the connection structure of the single-sided detachable bolt 306 and the earless support plate nut 307, such as Fig.10 , Fig.11 , Fig.14 As shown, the step 2 specifically includes:

[0069] Step 2.1, remove the single-sided detachable bolt inside the screw hole, and remove the leaking sealant at the joint surface between the inner skin and the internal frame of the screw hole;

[0070] Step 2.2, use the plugging bolt 304 to plug the screw hole on the earless support plate nut 307 on the internal structure of the fuel tank, firstly to prevent the sealant liquid from entering the interior of the fuel tank, and secondly to form a closed cavity, so that the sealant liquid can enter the damaged glue layer 305 of the adjacent structure bonding surface around the screw hole under the action of high pressure to achieve leak repair;

[0071] Step 2.3, position and fix the rotating glue injection assembly 200 through the glue injection positioning assembly 100, loosen the upper locking nut 203 and the lower locking nut 204 of the device, and align the sealing rubber pad 206 at the lower end of the glue injection cylinder 205 filled with glue with the screw hole of the oil leakage; according to the adsorbable position between the upper skin 301, the complete glue layer 302, and the lower skeleton structure 303, slide and adjust the positioning bolt 103 in the keyway of the mounting beam 101 and lock it, connect the air source, start the negative pressure generator 106, and position the glue injection positioning assembly 100 on the upper skin 301. Press the sealing rubber pad 206 at the lower end of the glue injection cylinder 205 on the upper skin 301, adjust the upper locking nut 203 and the lower locking nut 204, and fix the rotating glue injection assembly 200 on the mounting beam 101. The rotary handle 201 is turned to slowly inject the glue into the sealant through the nail holes on the upper skin 301 at high pressure.

[0072] Step 2.4, after the glue enters the damaged glue layer 305 around the screw hole and the adjacent structure joint surface, remove the rotating glue injection assembly 200 and the plugging bolt 304, and re-screw the single-sided removable bolt into the screw hole. Repeat the above operation for several nail holes adjacent to the oil leakage nail hole to ensure the sealing quality of the aircraft's overall fuel tank after the leak repair.

[0073] The other parts of this embodiment are the same as those of Embodiment 4, so they will not be described in detail.

[0074] Embodiment 5:

[0075] The method for repairing oil leakage in aircraft fuel tank structure by high pressure glue injection is improved on the basis of Example 4, such as Fig.12 , Fig.13 , Fig.15 As shown, the step 3 specifically includes:

[0076] Step 3.1, remove the leaking sealant at the joint surface between the inner skin of the screw hole and the inner frame;

[0077] Step 3.2, loosen the upper locking nut 203 and the lower locking nut 204 of the device, and align the sealing rubber pad 206 at the lower end of the glue injection cylinder 205 filled with glue with the oil leakage nail nest. According to the adsorbable position of the upper skin 301, slide and adjust the positioning bolt 103 in the keyway of the mounting beam 101 and lock it, connect the air source, start the negative pressure generator 106, and position the glue injection positioning assembly 100 on the upper skin 301. Press the sealing rubber pad 206 at the lower end of the glue injection cylinder 205 on the upper skin 301, adjust the upper locking nut 203 and the lower locking nut 204 to fix the rotating glue injection assembly 200 on the mounting beam 101. By turning the rotary handle 201, the glue liquid is directly injected into the oil leakage nail hole through the gap between the single-sided non-detachable bolt 308 and the upper skin 301, and the glue liquid enters the gap of the oil leakage part, and the aircraft fuel tank structure oil leakage high-pressure glue injection leak repairing device is disassembled.

[0078] Step 3.3: After the glue liquid is injected into the gap around the screw hole, remove the rotating glue injection assembly 200.

[0079] The other parts of this embodiment are the same as those of Embodiment 4, so they will not be described in detail.

[0080] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A high-pressure glue injection method for repairing oil leakage in an aircraft fuel tank structure, the method being implemented based on a glue injection repair device, the glue injection repair device comprising a rotating glue injection component (200), at least one group of glue injection positioning components (100) being arranged around the rotating glue injection component (200), the glue injection positioning component (100) being capable of moving in a direction approaching or away from the rotating glue injection component (200), the glue injection positioning component (100) comprising at least one adsorption end, the adsorption end being used to adsorb and fix the fuel tank structure so as to position and fix the rotating glue injection component (200); the glue injection positioning component (100) comprising a mounting beam (101) , a suction cup (102), and a negative pressure generator (106); a rotating glue injection assembly (200) is arranged at the center of the mounting beam (101); at least one group of suction cups (102) is slidably arranged around the rotating glue injection assembly (200) on the mounting beam (101); the suction cups (102) are connected to the negative pressure generator (106); and a valve switch (107) is arranged on the negative pressure generator (106); a key slot facing the rotating glue injection assembly (200) is arranged on the mounting beam (101); a positioning bolt (103) is rotatably arranged on the top thread of the suction cup (102); and the positioning bolt (103) is rotatably arranged on the top thread of the suction cup (102). 3) passing through the key slot and sliding along the key slot; a suction cup joint (104) is provided on one side of the suction cup (102), and the suction cup joint (104) is connected to the negative pressure generator (106) through a pipe joint (105); the rotary glue injection assembly (200) comprises a glue injection cylinder (205), a feed drive member, and a feed piston (207); a feed piston (207) is slidably provided inside the glue injection cylinder (205), a glue injection port is provided at one end of the glue injection cylinder (205), a feed drive member extending into the interior of the glue injection cylinder (205) is provided at the other end of the glue injection cylinder (205), and a drive end of the feed drive member The feeding drive member comprises a feeding screw (202) and a locking nut (203), wherein the locking nut (203) is mounted on one end of the injection cylinder (205), and the feeding screw (202) is threadedly mounted in the threaded hole of the locking nut (203), and one end of the feeding screw (202) extends into the interior of the injection cylinder (205) and is rotatably engaged with one end of the feeding piston (207); a sealing rubber pad (206) is provided at the injection port of the injection cylinder (205); the ... locking nut (203) is threadedly mounted in the threaded hole of the locking nut (203), and the feeding screw (202) is threadedly mounted in the threaded hole of the locking nut (203), and the feeding screw (202) is threadedly mounted in the threaded hole of the locking nut (203), and the feeding screw (202) is threadedly mounted in the threaded hole of the injection cylinder (205). The following steps are involved: Step 1, check the leaking part, and divide the leaking part into a single-side removable bolt leakage structure and a single-side non-removable bolt leakage structure. For the single-side removable bolt leakage structure, proceed to step 2, and for the single-side non-removable bolt leakage structure, proceed to step 3; Step 2, remove the single-sided detachable bolt inside the screw hole, then install a plugging bolt (304) in the screw hole, and use the plugging bolt (304) to plug the end of the screw hole close to the inside of the oil tank; then use the glue injection positioning component (100) to position and fix the rotating glue injection component (200) so that the glue injection end of the rotating glue injection component (200) is aligned with the screw hole, and the screw hole is injected with glue to repair the leak; use the glue injection positioning component (100) to position and fix the rotating glue injection component (200), loosen the upper locking nut (203) and the lower locking nut (204) of the device, and align the sealing rubber pad (206) at the lower end of the glue injection cylinder (205) filled with glue with the screw hole leaking oil; According to the adsorbable positions between the upper skin (301), the complete glue layer (302), and the lower skeleton structure (303), the positioning bolt (103) is slid and adjusted in the keyway of the mounting beam (101) and locked, the air source is connected, the negative pressure generator (106) is started, and the glue injection positioning assembly (100) is positioned on the upper skin (301); the sealing rubber pad (206) at the lower end of the glue injection cylinder (205) is pressed against the upper skin (301), and the upper locking nut (203) and the lower locking nut (204) are adjusted to fix the rotating glue injection assembly (200) on the mounting beam (101); the rotating handle (201) is turned to slowly and highly pressurize the glue liquid into the sealant through the nail holes on the upper skin (301); After the glue liquid enters the vicinity of the screw hole and the adjacent structure bonding surface to damage the glue layer (305), the rotating glue injection assembly (200) and the blocking bolt (304) are disassembled, and the single-sided removable bolt is re-screwed into the screw hole; Step 3, the rotating glue injection component (200) is then positioned and fixed by the glue injection positioning component (100), so that the glue injection end of the rotating glue injection component (200) is aligned with the screw hole, and the screw hole is injected with glue to repair the leak by rotating the glue injection component (200); the upper locking nut (203) and the lower locking nut (204) of the device are loosened, and the sealing rubber pad (206) at the lower end of the glue injection cylinder (205) filled with glue is aligned with the oil leakage nail hole; according to the adsorbable position of the upper skin (301), the positioning bolt (103) is slid and adjusted in the keyway of the mounting beam (101) and locked, the air source is connected, and the negative pressure generator (106) is started. ), positioning the glue injection positioning assembly (100) on the upper skin (301); pressing the sealing rubber pad (206) at the lower end of the glue injection cylinder (205) onto the upper skin (301), adjusting the upper locking nut (203) and the lower locking nut (204) to fix the rotating glue injection assembly (200) on the mounting beam (101); rotating the rotating handle (201), directly injecting the glue liquid into the oil leakage nail hole through the gap between the single-sided non-detachable bolt (308) and the upper skin (301), and slowly injecting the glue liquid into the oil leakage nail hole at high pressure. After the glue liquid enters the gap of the oil leakage part, the aircraft fuel tank structure oil leakage high-pressure glue injection leak repairing device is disassembled.

2. The method for repairing oil leakage in aircraft fuel tank structure with high pressure glue injection according to claim 1, characterized in that: The step 2 specifically includes: Step 2.1, remove the single-sided detachable bolt inside the screw hole, and remove the leaking sealant at the joint surface between the inner skin and the internal frame of the screw hole; Step 2.2, screw the plugging bolt (304) into the screw hole so that the plugging bolt (304) blocks the end of the screw hole close to the oil tank, and reserve a glue injection space between the plugging bolt (304) and the skin; Step 2.3, positioning and fixing the rotating glue injection component (200) by means of the glue injection positioning component (100), so that the glue injection end of the rotating glue injection component (200) is aligned with the screw hole, and the screw hole is filled with glue by means of the rotating glue injection component (200); Step 2.4: After the glue is injected between the skin and the inner frame bonding surface of the skin, remove the blocking bolt (304) and the rotating glue injection assembly (200) in turn, and re-screw the single-sided detachable bolt into the screw hole.

3. The method for repairing oil leakage in aircraft fuel tank structure with high pressure glue injection according to claim 2, characterized in that: The step 3 specifically includes: Step 3.1, remove the leaking sealant at the joint surface between the inner skin of the screw hole and the inner frame; Step 3.2, positioning and fixing the rotating glue injection component (200) by means of the glue injection positioning component (100), so that the glue injection end of the rotating glue injection component (200) is aligned with the screw hole, and the screw hole is filled with glue by means of the rotating glue injection component (200); Step 3.3: After the glue liquid is injected into the gap around the screw hole, remove the rotating glue injection assembly (200).

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