A decomposition apparatus and method for improving the decomposition efficiency of fuel filter housings.

Abstract

This invention relates to a disassembly device and method for improving the disassembly efficiency of fuel filter housings, belonging to the field of aero-engine maintenance. The device's hammer (2) is mounted on a lever (1), and the connecting plate (4) is U-shaped. The lever (1) is connected to the connecting plate (4). Pulling heads A (5) and B (6) are respectively located at the lower ends of both sides of the connecting plate (4), and the distance between pulling heads A (5) and B (6) is adjustable. The method includes the following steps: a) rotating the fuel filter housing (10) until it detaches; b) inserting pulling heads A (5) and B (6) into the protruding parts of the cylindrical surface of the fuel filter housing (10) and fixing pulling head B (6); c) grasping the hammer (2) and moving it upwards. This method shortens the average disassembly time to less than 1 minute, reduces the housing damage rate to 0, improves disassembly efficiency, and reduces maintenance operation time. It solves the problems of destructive disassembly in existing technologies, which causes damage to the housing surface and takes too long to disassemble.

Description

Technical Field

[0001] This invention relates to a disassembly apparatus and method for improving the disassembly efficiency of fuel filter housings, belonging to the field of aero-engine maintenance. Background Technology

[0002] The fuel filter of a certain type of engine's fuel control module (FMM) is a lifespan component, requiring replacement every 600 hours or 3 years (whichever comes first). Replacing the fuel filter first requires disassembling the fuel filter housing. Currently, users lack an efficient method for disassembling the fuel filter housing and can only forcibly remove it manually. During operation, it was found that negative pressure easily forms inside and outside the fuel filter housing, making it extremely difficult to remove. Furthermore, the rubber ring is easily cut during rotation, causing the housing to become stuck in the mounting slot. The cylindrical shape of the housing, lacking a point of leverage, further increases the difficulty of disassembly. Due to the complex shape of the fuel control module and the small gap between the fuel filter housing and the fuel pump housing, there is significant interference in the operating space, making tooling design challenging. Currently, disassembly is too time-consuming, averaging about 12 minutes, with the longest disassembly time exceeding 30 minutes, necessitating destructive disassembly, resulting in surface damage to the housing, with a damage rate of approximately 5%. Maintenance requires in-situ engine disassembly. The complex surface of an aero-engine and the confined space further complicate disassembly, leading to repeated requests for disassembly tooling from the factory; the need is extremely urgent. Summary of the Invention

[0003] The technical problem to be solved by the present invention is that the existing technology destructively decomposes the shell, causing damage to the shell surface, and the decomposition takes too long.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a decomposition device for improving the decomposition efficiency of fuel filter housing of fuel control module, including a lever, a hammer, a puller head A, a puller head B and a connecting plate. The hammer is inserted through the lever and slidably connected to the lever. The connecting plate has a Z-shaped structure. The lower end of the lever 1 is connected to the upper end of the connecting plate. Puller head A and puller head B are respectively arranged on the lower left and right sides of the connecting plate, and the distance between puller head A and puller head B is adjustable.

[0005] In the above structure, the puller head A and puller head B are arc-shaped structures with their notches facing each other.

[0006] Furthermore, the puller head A and puller head B in the above structure are provided with a stepped snap-fit ​​part on their opposite sidewalls, and the snap-fit ​​part is adapted to the protrusion on the cylindrical surface of the fuel filter housing.

[0007] In the above structure, the puller head B is slidably connected to the connecting plate, and the puller head B can be fixed on the connecting plate.

[0008] Furthermore, the above structure also includes a knurled high-head screw and a cylindrical pin. A strip groove is provided at the lower right end of the connecting plate. A pin hole and a threaded hole are provided at intervals on the connecting part of the puller head B. One end of the cylindrical pin is inserted into the pin hole, and the other end is placed in the groove. The knurled high-head screw passes through the groove and connects to the threaded hole.

[0009] The above structure also includes a locking nut. One end of the lever is provided with an external thread. The end of the lever passes through the connecting plate and is connected to the locking nut, so that the lever is fixedly connected to the connecting plate.

[0010] In the above structure, the end of the lever away from the connecting plate is provided with a movable handle 9.

[0011] A decomposition method for improving the decomposition efficiency of a fuel filter housing in a fuel control module, comprising any of the decomposition devices described above, comprising the following steps:

[0012] a. Use a wrench to rotate the fuel filter housing until it is dislodged from the fixed step;

[0013] b. Insert the puller head A of the disassembly device into the protruding part of the cylindrical surface of the fuel filter housing, adjust the position of the puller head B so that the puller head B fits against the protruding part of the cylindrical surface of the fuel filter housing, and fix the puller head B.

[0014] c. Hold the hammer and move it upwards quickly to remove the fuel filter housing.

[0015] The beneficial effects of this invention are as follows: This structure incorporates an auxiliary disassembly device, optimizing the disassembly method of the fuel filter housing. It solves the long-standing problems of time-consuming fuel filter housing disassembly, particularly the difficulty of on-machine disassembly. It avoids damage to the housing surface during disassembly, reduces maintenance costs, and improves disassembly efficiency. Through the application of this method, the average disassembly time of the fuel filter housing is reduced to less than 1 minute, the housing damage rate is reduced to 0%, and maintenance costs are saved by an average of 11,000 yuan per year. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the decomposition device of the present invention;

[0017] Figure 2 This is a front view schematic diagram of the decomposition device of the present invention;

[0018] Figure 3 This is a cross-sectional structural diagram of the decomposition device of the present invention.

[0019] Figure 4 This is a schematic diagram of the actual structure of the decomposition device of the present invention.

[0020] Attached reference numerals: 1 is lever, 2 is hammer, 3 is lock nut, 4 is connecting plate, 5 is puller head A, 6 is puller head B, 7 is cylindrical pin, 8 is knurled head screw, 9 is movable handle, and 10 is fuel filter housing. Detailed Implementation

[0021] The invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1 to 4 As shown, the present invention discloses a decomposition device for improving the decomposition efficiency of fuel filter housing of fuel control module, comprising a lever 1, a hammer 2, a puller head A5, a puller head B6, and a connecting plate 4. The hammer 2 passes through the lever 1 and is slidably connected to the lever 1. The connecting plate 4 has a U-shaped structure, with the lower end of the lever 1 connected to the upper end of the connecting plate 4. The puller head A5 and the puller head B6 are respectively disposed on the lower left and right sides of the connecting plate 4, and the distance between the puller head A5 and the puller head B6 is adjustable. Those skilled in the art will understand that this device mainly includes a lever 1, a hammer 2, a puller head A5, a puller head B6, and a connecting plate 4. The hammer 2 is inserted through the lever 1 and slidably connected to it. In practice, the fuel filter housing 10 can be pulled out by directly impacting the hammer 2. Preferably, the connecting plate 4 has a U-shaped structure, specifically connecting the lower end of the lever 1 to the upper end of the connecting plate 4. Preferably, the lever 1 is perpendicularly connected to the middle of the upper end of the connecting plate 4, and the upper end of the lever 1 is flanged to effectively prevent the hammer 2 from slipping off the lever 1. The puller heads A5 and B6 are respectively located on the lower left and right sides of the connecting plate 4. The puller heads A5 and B6 are mainly used to fix the protruding parts of the cylindrical surface of the fuel filter housing 10, and the distance between the puller heads A5 and B6 is adjustable to facilitate fixing the fuel filter housing 10.

[0023] Preferably, the extractor heads A5 and B6 in the above structure are arc-shaped, with their recesses facing each other. Those skilled in the art will understand that, in order to increase the contact area between the extractor heads A5 and B6 and the protruding portion of the cylindrical surface of the fuel filter housing 10, it is preferable that the extractor heads A5 and B6 are arc-shaped, with their recesses facing each other, so that the inner walls of the extractor heads A5 and B6 are in stable contact with the protruding portion of the cylindrical surface of the fuel filter housing 10.

[0024] Preferably, in the above structure, the sidewalls facing each other of the puller head A5 and puller head B6 are provided with stepped locking portions, and the locking portions are adapted to the protrusions on the cylindrical surface of the fuel filter housing 10. Those skilled in the art will understand that, in order to further improve the structural strength of the connection, this structure preferably has stepped locking portions on the sidewalls facing each other of the puller head A5 and puller head B6, and the locking portions are adapted to the protrusions on the cylindrical surface of the fuel filter housing 10, facilitating the adjustment of the positions of the puller head A5 and puller head B6 to lock and fix them to the protrusions on the cylindrical surface of the fuel filter housing 10.

[0025] Preferably, in the above structure, the puller head B6 is slidably connected to the connecting plate 4, and the puller head B6 can be fixed on the connecting plate 4. Those skilled in the art will understand that, more preferably, the puller head B6 is slidably connected to the connecting plate 4 to adjust the distance between the puller head A5 and the puller head B6, facilitating insertion into the fuel filter housing 10. Simultaneously, it is further preferred that the puller head B6 be fixed on the connecting plate 4, so that after adjusting the distance between the puller head A5 and the puller head B6 to insert into the fuel filter housing 10, the puller head B6 can be fixed.

[0026] Preferably, the above structure further includes a knurled head screw 8 and a cylindrical pin 7. A strip groove is provided at the lower right end of the connecting plate 4. A pin hole and a threaded hole are spaced apart on the connecting part of the puller head B6. One end of the cylindrical pin 7 passes through the pin hole, and the other end is placed in the groove. The knurled head screw 8 passes through the groove and connects to the threaded hole. Those skilled in the art will understand that this structure further preferably includes a knurled head screw 8 and a cylindrical pin 7. In practice, a strip groove is provided at the lower right end of the connecting plate 4, with the length of the groove aligned with the puller head A5. A pin hole and a threaded hole are spaced apart on the connecting part of the puller head B6. One end of the cylindrical pin 7 passes through the pin hole, and the other end is placed in the groove. The knurled head screw 8 passes through the groove and connects to the threaded hole. This structure ensures that the cylindrical pin 7 is always placed in the groove, preventing the puller head B6 from rotating when the knurled head screw 8 is turned, thus making it easier to fix the puller head B6.

[0027] Preferably, the above structure further includes a locking nut 3. One end of the lever 1 is provided with an external thread. The end of the lever 1 passes through the connecting plate 4 and connects with the locking nut 3, thereby fixing the lever 1 to the connecting plate 4. Those skilled in the art will understand that, preferably, the lever 1 and the connecting plate 4 are detachably connected for easy assembly. Preferably, the lever 1 is provided with an external thread at one end, that is, the end connecting to the connecting plate 4 is provided with an external thread, and a through hole is provided at the upper end of the connecting plate 4. In practice, the end of the lever 1 passes through the connecting plate 4 and connects with the locking nut 3, thereby fixing the lever 1 to the connecting plate 4.

[0028] Preferably, in the above structure, the lever 1 is provided with a movable handle 9 at the end away from the connecting plate 4. Those skilled in the art will understand that, for ease of taking and putting away the lever 1, this structure preferably provides a movable handle 9 at the end of the lever 1 away from the connecting plate 4. In practice, a through hole is provided at the end of the lever 1, and the movable handle 9 is a rod-shaped structure that can be directly inserted into the through hole.

[0029] A decomposition method for improving the decomposition efficiency of a fuel filter housing in a fuel control module, comprising any of the decomposition devices described above, comprising the following steps:

[0030] a. Loosen the locking pin and rotate the fuel filter housing 10 until it is disengaged from the fixed step;

[0031] b. Insert the puller head A5 of the disassembly device into the protruding part of the cylindrical surface of the fuel filter housing 10, adjust the position of the puller head B6 so that the puller head B6 fits against the protruding part of the cylindrical surface of the fuel filter housing 10, and fix the puller head B6.

[0032] c. Grasp the hammer 2 and move it upwards quickly to remove the fuel filter housing 10. Those skilled in the art will understand that, for easy and quick removal of the fuel filter housing 10, step a primarily aims to detach the fuel filter housing 10 from the fuel pump. This is achieved by rotating the fuel filter housing 10 with a wrench until it is disengaged from the fixed step. Since a nut is originally provided at the upper end of the fuel filter housing 10, simply wrench the wrench onto the nut, and rotating the wrench will synchronously rotate the fuel filter housing 10. Step b primarily involves securing the puller head A5 and puller head B6 to the protruding part of the cylindrical surface of the fuel filter housing 10. Specifically, first, insert the puller head A5 of the disassembly device into one side of the protruding part of the cylindrical surface of the fuel filter housing 10, then adjust the position of the puller head B6 so that it fits against the protruding part of the cylindrical surface of the fuel filter housing 10, and then fix the puller head B6 to fix the distance between the puller head A5 and the puller head B6. Step c involves directly moving the hammer 2 upwards quickly to remove the fuel filter housing 10. This method can remove the fuel filter housing 10 within 1 minute, and the damage rate of the fuel filter housing 10 is reduced to 0, saving maintenance costs.

Claims

1. A decomposition device for improving the decomposition efficiency of fuel filter housing in a fuel control module, characterized in that: The assembly includes a lever (1), a hammer (2), a puller head A (5), a puller head B (6), and a connecting plate (4). The hammer (2) passes through the lever (1) and is slidably connected to it. The connecting plate (4) has a U-shaped structure. The lower end of the lever (1) is connected to the upper end of the connecting plate (4). Puller heads A (5) and B (6) are respectively located on the lower left and right sides of the connecting plate (4), and the distance between puller heads A (5) and B (6) is adjustable. Puller heads A (5) and B (6) have an arc-shaped structure, and their notches face each other. The puller heads A (5) and B (6) are arranged in a U-shape. The side wall facing the head B (6) is provided with a stepped snap-fit ​​part, and the snap-fit ​​part is adapted to the protrusion of the cylindrical surface of the fuel filter housing (10); the puller head B (6) is slidably connected to the connecting plate (4), and the puller head B (6) can be fixed on the connecting plate (4); it also includes a knurled head screw (8) and a cylindrical pin (7). The lower right end of the connecting plate (4) is provided with a strip groove. The connecting part of the puller head B (6) is provided with a pin hole and a threaded hole at intervals. One end of the cylindrical pin (7) is inserted into the pin hole, and the other end is placed in the groove. The knurled head screw (8) passes through the groove and is connected to the threaded hole.

2. The decomposition device for improving the decomposition efficiency of fuel filter housing in a fuel control module according to claim 1, characterized in that: It also includes a locking nut (3), one end of the lever (1) is provided with an external thread, and the end of the lever (1) passes through the connecting plate (4) and is connected to the locking nut (3), so that the lever (1) is connected and fixed to the connecting plate (4).

3. The decomposition device for improving the decomposition efficiency of the fuel filter housing in a fuel control module according to claim 1, characterized in that: The lever (1) is provided with a movable handle (9) at the end away from the connecting plate (4).

4. A decomposition method for improving the decomposition efficiency of a fuel filter housing in a fuel control module, characterized in that: The decomposition apparatus comprising any one of claims 1 to 3 comprises the following steps: a. Rotate the fuel filter housing (10) with a wrench until it is disengaged from the fixed step; b. Insert the puller head A (5) of the disassembly device into the protruding part of the cylindrical surface of the fuel filter housing (10), adjust the position of the puller head B (6) so that the puller head B (6) fits against the protruding part of the cylindrical surface of the fuel filter housing (10), and fix the puller head B (6). c. Hold the hammer (2) and move it upwards quickly to remove the fuel filter housing (10).

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