Device and Method for Separately Assembling Lever Rollers of Main Fuel Pump Regulator of Aeroengine

Abstract

The present invention discloses a device and method for separately assembling the lever roller of the main fuel pump regulator of an aeroengine, which relates to the field of repair of aeroengine parts. The present invention includes a bottom plate, and a surrounding wall protruding upward is constructed on the outer edge of the bottom plate. The surrounding wall forms an installation station and a disassembly station; a positioning mechanism is constructed in the disassembly station, and the positioning mechanism includes a positioning device arranged on the bottom plate and a backing plate rotatably arranged on the top surface of the surrounding wall. An arc-shaped channel vertically penetrating is constructed at one end of the backing plate, and the end of the backing plate with the arc-shaped channel is used to position the roller end of the lever, and the pin shaft of the roller is vertically exposed at the position of the arc-shaped channel; the installation station includes an auxiliary loading mechanism arranged on the bottom plate, and the auxiliary loading mechanism includes a vertically arranged and elastically installed ejector pin, and the ejector pin is used to extend into the roller shaft hole to be loaded; to solve the problems of low disassembly efficiency and low assembly quality caused by the lack of special disassembly tooling and assembly tooling when replacing the roller of the integrated lever.

Description

Technical Field

[0001] The present invention relates to the field of repair of aero-engine components. Specifically, it is a device and method for assembling and disassembling the lever roller of the main fuel pump regulator of an aero-engine. Background Art

[0002] The main fuel pump regulator is the core control accessory of an aero-engine, mainly used to reliably control the engine at different flight altitudes, speeds, atmospheric temperatures and pressures, and ensure the stable operation of the engine in various states. As a highly precise mechanical-hydraulic control accessory, the internal structure of the main fuel regulator is complex, and the cooperation and coordination requirements between its components are extremely high. The combined lever is used to synthesize the rotational speed signal and the air pressure signal to ensure the normal operation of the main fuel pump regulator. One end of the combined lever is a ball socket structure, and the other end is a roller structure. After long-term operation, the roller often shows abnormal wear, affecting the reliability of the main fuel pump regulator. When the roller wears, it needs to be replaced. Summary of the Invention

[0003] The purpose of the present invention is to provide a device and method for assembling and disassembling the lever roller of the main fuel pump regulator of an aero-engine, so as to solve the problems of low disassembly efficiency and low assembly quality caused by the lack of special disassembly and assembly tools when replacing the roller of the combined lever.

[0004] To solve the above problems, the present invention adopts the following technical means:

[0005] A device for assembling and disassembling the lever roller of the main fuel pump regulator of an aero-engine, including a bottom plate, the outer edge of the bottom plate is constructed with an upward protruding enclosure, and the enclosure forms an installation station and a disassembly station;

[0006] A positioning mechanism is constructed in the disassembly station. The positioning mechanism includes a positioning device arranged on the bottom plate and a backing plate rotatably arranged on the top surface of the enclosure. One end of the backing plate is constructed with a vertically penetrating arc-shaped channel, and the end of the backing plate with the arc-shaped channel is used to position the roller end of the lever, and the pin shaft of the roller is vertically exposed at the position of the arc-shaped channel;

[0007] The installation station includes an auxiliary loading mechanism arranged on the bottom plate. The auxiliary loading mechanism includes a vertically arranged and elastically installed ejector pin, and the ejector pin is used to extend into the roller shaft hole to be loaded.

[0008] Preferably, the backing plate is clamped between the bottom plate and the enclosure. The backing plate includes a positioning part with a through hole, an arc-shaped plate is installed on the outer edge of the positioning part, and the arc-shaped side of the arc-shaped plate and the positioning part form the arc-shaped channel. A tail rod is also installed on the side wall of the outer edge of the positioning part opposite to the arc-shaped plate.

[0009] Furthermore, a compression screw is rotatably installed at the position of the through hole of the positioning part. One end of the compression screw is threadedly connected to the bottom plate. The other end of the compression screw rotatably passes through the enclosure and is configured as a square head structure. The stage where the compression screw is configured as a square head structure is detachably connected to a plum blossom knob, and the plum blossom knob is configured with a square hole matching the square head structure.

[0010] Even further, an annular groove for sliding and embedding in the positioning part is configured on the compression screw.

[0011] Even further, leveling screws are also provided in the installation station and the disassembly station. The bottom end of the leveling screw is threadedly connected to the bottom plate, and the top end of the leveling screw is configured as a flat surface structure.

[0012] Even further, the auxiliary loading mechanism includes an installation base. The installation base is inserted and assembled on the bottom plate. An installation cavity is configured inside the installation base. The installation cavity penetrates through the top surface of the installation base. A contact stop cover is installed on the top surface of the installation base. A thimble is slidably arranged inside the installation cavity. One end of the thimble slidably extends out of the contact stop cover. A limiting ring is arranged on the part of the thimble located inside the installation cavity. A compression spring is arranged inside the installation cavity. One end of the compression spring abuts against the limiting ring, and the other end abuts against the bottom surface of the installation cavity. The end of the limiting ring opposite to the compression spring abuts against the contact stop cover.

[0013] In addition, a sub - assembly method for the lever roller of the main fuel pump regulator of an aero - engine as described above includes a disassembly method and an assembly method;

[0014] The disassembly method includes the following steps:

[0015] S110. Load the integrated lever into the disassembly station;

[0016] S120. Level and adjust the integrated lever through the leveling screw;

[0017] S130. Use a backing plate to press - fit and position the roller end of the integrated lever, and make the pin shaft of the roller vertically exposed in the arc - shaped channel;

[0018] S140. Use the plum blossom knob to drive the compression screw, so that the backing plate presses the roller end tightly. After completion, remove the plum blossom knob and move it to the compression screw of the idle backing plate;

[0019] S150. Use a punch to abut one end of the pin shaft of the roller, and use a hammer to strike the punch to remove the pin shaft of the roller, completing the disassembly of the roller and the integrated lever;

[0020] The assembly method includes the following steps:

[0021] S210. Load the roller to be installed onto the integrated lever, then place the roller on the top surface of the abutting stop cover of the auxiliary loading mechanism. Let the ejector pin pass through the small shaft holes of the integrated lever and the roller simultaneously, and use the leveling screw to level the integrated lever at the same time;

[0022] S220. Align the small shaft to be loaded with the ejector pin, and use a hammer to strike the small shaft so that it is gradually loaded into the roller along the retracting direction of the ejector pin until the pin shaft is stopped at the end face of the integrated lever;

[0023] S230. Move the assembled integrated lever under the backing plate. After leveling the integrated lever through the leveling screw, rotate the backing plate so that the backing plate presses the roller, and make the pin shaft expose in the arc-shaped channel. After tightening the compression screw through the plum blossom knob, remove the plum blossom knob to complete the pressing and positioning of the backing plate on the roller;

[0024] S240. Use a punch to impact around the installation hole of the small shaft of the integrated lever roller so that the integrated lever base plays an insurance role for the small shaft;

[0025] For the other end of the roller after the pin shaft is installed, after turning the entire integrated lever over, repeat S230 - S240 to complete the assembly of the roller.

[0026] During the use of the present invention, the following beneficial effects are achieved:

[0027] Aiming at the problems of low disassembly efficiency and low assembly quality due to the lack of special disassembly tooling and assembly tooling when replacing the roller of the integrated lever, based on the analysis of the part structure, a set of special tooling integrating disassembly and assembly functions is designed and manufactured. It realizes the precise fixation of the integrated lever during the disassembly and assembly processes, facilitating the rapid and precise disassembly of the small shaft and the concentric positioning of the installation hole of the integrated lever and the roller during assembly. Through the application of this invention, the disassembly time and assembly time are greatly shortened, and the replacement time of the integrated lever roller and the small shaft is reduced from 30 minutes to within 5 minutes. At the same time, the backing plate structure designed in this invention can avoid the risk of tight rollers caused by the deformation of the integrated lever during impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of the present invention.

[0029] Figure 2 It is a schematic structural diagram of the backing plate of the present invention.

[0030] Figure 3 It is a schematic structural diagram of the compression screw of the present invention.

[0031] Figure 4 It is a schematic structural diagram of the plum blossom knob of the present invention.

[0032] Figure 5 This is a schematic structural diagram of the auxiliary loading mechanism of the present invention.

[0033] Among them, 1 - bottom plate, 2 - enclosure, 3 - cushion plate, 4 - arc-shaped channel, 5 - auxiliary loading mechanism, 6 - ejector pin, 7 - positioning part, 8 - arc-shaped plate, 9 - tail rod, 10 - compression screw, 11 - plum blossom knob, 12 - annular groove, 13 - leveling screw, 14 - mounting base, 15 - mounting cavity, 16 - abutting stop cover, 17 - limiting ring, 18 - compression spring. Specific embodiments

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0036] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of the present invention is usually placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention 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 therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Please refer to Figures 1 to 5 As shown, a lever roller sub-assembly device for an aero-engine main fuel pump regulator includes a bottom plate 1. An upwardly protruding enclosure 2 is formed along the outer edge of the bottom plate 1, and the enclosure 2 forms an installation station and a disassembly station.

[0041] A positioning mechanism is formed in the disassembly station. The positioning mechanism includes a positioning device provided on the bottom plate 1 and a backing plate 3 rotatably provided on the top surface of the enclosure 2. An arc-shaped channel 4 is vertically formed through one end of the backing plate 3. One end of the backing plate 3 with the arc-shaped channel 4 is used to position the roller end of the lever, and the pin shaft of the roller is vertically exposed at the position of the arc-shaped channel 4.

[0042] The installation station includes an auxiliary loading mechanism 5 provided on the bottom plate 1. The auxiliary loading mechanism 5 includes a vertically arranged and elastically mounted ejector pin 6, and the ejector pin 6 is used to extend into the roller shaft hole to be loaded.

[0043] In this way, aiming at the problems of low disassembly efficiency and poor assembly quality caused by the lack of special disassembly tooling and assembly tooling when replacing the roller of the integrated lever, based on the analysis of the part structure, a set of special tooling integrating disassembly and assembly functions is designed and manufactured. It realizes the precise fixation of the integrated lever during disassembly and assembly, facilitates the rapid and precise disassembly of the small shaft, and the concentric positioning of the installation hole of the integrated lever and the roller during assembly. Through the application of this invention, the disassembly time and assembly time are greatly shortened, and the replacement time of the integrated lever roller and the small shaft is reduced from 30 minutes to within 5 minutes. At the same time, the structure of the backing plate 3 designed in this invention can avoid the risk of tight rollers caused by the deformation of the integrated lever during impact.

[0044] Furthermore, the backing plate 3 is clamped between the bottom plate 1 and the enclosure 2. The backing plate 3 includes a positioning portion 7 with a through hole. An arc-shaped plate 8 is installed on the outer edge of the positioning portion 7. The arc-shaped side of the arc-shaped plate 8 and the positioning portion 7 form the arc-shaped channel 4. A tail rod 9 is also installed on the side wall of the outer edge of the positioning portion 7 opposite to the arc-shaped plate 8.

[0045] Moreover, a pressing screw 10 is rotatably installed at the through-hole position of the positioning portion 7. One end of the pressing screw 10 is threadedly connected to the bottom plate 1, and the other end of the pressing screw 10 rotatably passes through the enclosure 2 and is configured as a square head structure. The stage where the pressing screw 10 is configured as a square head structure is detachably connected to a plum blossom knob 11, and the plum blossom knob 11 is configured with a square hole matching the square head structure.

[0046] Furthermore, an annular groove 12 for slidably fitting into the positioning portion 7 is formed on the pressing screw 10.

[0047] Meanwhile, leveling screws 13 are also provided in the installation station and the disassembly station. The bottom end of the leveling screw 13 is threadedly connected to the bottom plate 1, and the top end of the leveling screw 13 is configured as a flat surface structure.

[0048] In addition, the auxiliary loading mechanism 5 includes a mounting base 14. The mounting base 14 is inserted and assembled on the bottom plate 1. An installation cavity 15 is formed in the mounting base 14. The installation cavity 15 penetrates through the top surface of the mounting base 14. A contact stop cover 16 is mounted on the top surface of the mounting base 14. A thimble 6 is slidably disposed in the installation cavity 15. One end of the thimble 6 slidably extends out of the contact stop cover 16. A limiting ring 17 is provided on the portion of the thimble 6 located in the installation cavity 15. A compression spring 18 is provided in the installation cavity 15. One end of the compression spring 18 abuts against the limiting ring 17, and the other end abuts against the bottom surface of the installation cavity 15. The end of the limiting ring 17 opposite to the compression spring 18 abuts against the contact stop cover 16.

[0049] Specifically, for the device of the present invention, the following method is adopted for assembly and disassembly. A sub-assembly method for the lever roller of the main fuel pump regulator of an aero-engine as described above includes a disassembly method and an assembly method;

[0050] The disassembly method includes the following steps:

[0051] S110. Load the integrated lever into the disassembly station;

[0052] S120. Level and adjust the integrated lever through the leveling screw 13;

[0053] S130. Use the backing plate 3 to press and position the roller end of the integrated lever, and make the pin shaft of the roller vertically exposed in the arc-shaped channel 4;

[0054] S140. Drive the pressing screw 10 by using the plum blossom knob 11 to press the roller end with the backing plate 3. After completion, remove the plum blossom knob 11 and move it to the pressing screw 10 of the idle backing plate 3;

[0055] S150. Use a punch to abut one end of the pin shaft of the roller, and use a hammer to strike the punch to remove the pin shaft of the roller, completing the disassembly of the roller and the combined lever;

[0056] The assembly method includes the following steps:

[0057] S210. Install the roller to be installed onto the combined lever, then place the roller on the top surface of the abutting stop cover 16 of the auxiliary installation mechanism 5, and let the ejector pin 6 pass through the small shaft holes of the combined lever and the roller at the same time. At the same time, level the combined lever using the leveling screw 13;

[0058] S220. Align the small shaft to be installed with the ejector pin 6, and use a hammer to strike the small shaft so that it is gradually installed into the roller along the retraction direction of the ejector pin 6 until the pin shaft stops at the end face of the combined lever;

[0059] S230. Move the assembled combined lever below the backing plate 3. After leveling the combined lever through the leveling screw 13, rotate the backing plate 3 so that the backing plate 3 presses the roller, and let the pin shaft be exposed in the arc-shaped channel 4. After tightening the compression screw 10 through the plum blossom knob 11, remove the plum blossom knob 11 to complete the pressing and positioning of the backing plate 3 on the roller;

[0060] S240. Impact around the installation hole of the small shaft of the combined lever roller through a punch to make the combined lever body play an insurance role for the small shaft;

[0061] For the other end of the roller after the pin shaft is installed, after turning the entire combined lever over, repeat S230 - S240 to complete the assembly of the roller.

[0062] In this way, aiming at the problems of low disassembly efficiency and low assembly quality caused by the lack of special disassembly tooling and assembly tooling when replacing the roller of the combined lever, based on the analysis of the part structure, a set of special tooling integrating disassembly and assembly functions is designed and manufactured. It realizes the precise fixation of the combined lever during the disassembly and assembly processes, facilitating the rapid and precise disassembly of the small shaft and the concentric positioning of the installation hole of the combined lever and the roller during assembly.

[0063] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for assembling the lever roller of the main fuel pump regulator of an aeroengine, characterized in that It includes a bottom plate (1), and a surrounding wall (2) protruding upward is constructed on the outer edge of the bottom plate (1). The surrounding wall (2) constructs an installation station and a disassembly station; A positioning mechanism is constructed in the disassembly station. The positioning mechanism includes a backing plate (3) rotatably arranged on the top surface of the surrounding wall (2). One end of the backing plate (3) is constructed with an arc-shaped channel (4) vertically penetrating therethrough. The end of the backing plate (3) where the arc-shaped channel (4) is constructed is used to position the roller end of the lever, and the pin shaft of the roller is vertically exposed at the position of the arc-shaped channel (4); The installation station includes an auxiliary loading mechanism (5) arranged on the bottom plate (1). The auxiliary loading mechanism (5) includes a thimble (6) vertically arranged and elastically installed. The thimble (6) is used to extend into the roller shaft hole to be loaded; The backing plate (3) is clamped between the bottom plate (1) and the surrounding wall (2). The backing plate (3) includes a positioning portion (7) constructed with a through hole. An arc-shaped plate (8) is installed on the outer edge of the positioning portion (7). The arc-shaped side of the arc-shaped plate (8) and the positioning portion (7) form the arc-shaped channel (4). A tail rod (9) is also installed on the side wall of the outer edge of the positioning portion (7) opposite to the arc-shaped plate (8); A compression screw (10) is rotatably installed at the through hole position of the positioning portion (7). One end of the compression screw (10) is threadedly connected to the bottom plate (1). The other end of the compression screw (10) rotatably passes through the surrounding wall (2) and is constructed as a square head structure. The stage where the compression screw (10) is constructed as a square head structure is detachably connected to a plum blossom knob (11). The plum blossom knob (11) is constructed with a square hole matching the square head structure; The auxiliary loading mechanism (5) includes a mounting base (14). The mounting base (14) is inserted and assembled on the bottom plate (1). An installation cavity (15) is constructed in the mounting base (14). The installation cavity (15) is vertically penetrated from the top surface of the mounting base (14). A contact stop cover (16) is installed on the top surface of the mounting base (14). A thimble (6) is slidably arranged in the installation cavity (15). One end of the thimble (6) slidably extends out of the contact stop cover (16). A limit ring (17) is arranged on the part of the thimble (6) located in the installation cavity (15). A compression spring (18) is arranged in the installation cavity (15). One end of the compression spring (18) abuts against the limit ring (17), and the other end abuts against the bottom surface of the installation cavity (15). The end of the limit ring (17) opposite to the compression spring (18) abuts against the contact stop cover (16).

2. The lever roller sub-assembly device for the main fuel pump regulator of an aero-engine according to claim 1, characterized in that An annular groove (12) for slidably embedding the positioning portion (7) is constructed on the compression screw (10).

3. The lever roller subassembly device for the main fuel pump regulator of an aeroengine according to claim 1, wherein Leveling screws (13) are also arranged in the installation station and the disassembly station. The bottom end of the leveling screw (13) is threadedly connected to the bottom plate (1). The top end of the leveling screw (13) is constructed as a flat structure.

4. A sub-assembly method for the sub-assembly device of the lever roller of the main fuel pump regulator for an aero-engine according to any one of claims 1 to 3, characterized in that, It includes a disassembly method and an assembly method; The disassembly method includes the following steps: S110. Install the combined lever into the disassembly station; S120. Level and adjust the combined lever by means of the leveling screw (13); S130. Use the backing plate (3) to press and position the roller end of the combined lever, and expose the pin shaft of the roller vertically in the arc-shaped channel (4); S140. Use the plum blossom knob (11) to drive the compression screw (10) to make the backing plate (3) press the roller end. After completion, remove the plum blossom knob (11) and move it to the compression screw (10) of the idle backing plate (3); S140. Use a punch to abut one end of the pin shaft of the roller, and use a hammer to strike the punch to remove the pin shaft of the roller, completing the disassembly of the roller and the combined lever; The assembly method includes the following steps: S210. Install the roller to be installed on the combined lever, then place the roller on the top surface of the abutting stop cover (16) of the auxiliary installation mechanism (5), and let the thimble (6) pass through the small shaft holes of the combined lever and the roller at the same time. At the same time, level the combined lever by means of the leveling screw (13); S220. Align the small shaft to be installed with the thimble (6), and use a hammer to strike the small shaft so that it is gradually installed into the roller along the retracting direction of the thimble (6) until the pin shaft stops at the end face of the combined lever; S230. Move the assembled combined lever under the backing plate (3). After leveling the combined lever by means of the leveling screw (13), rotate the backing plate (3) to make the backing plate (3) press the roller, and expose the pin shaft in the arc-shaped channel (4). After tightening the compression screw (10) with the plum blossom knob (11), disassemble the plum blossom knob (11) to complete the pressing and positioning of the roller by the backing plate (3); S240. Impact around the installation hole of the roller small shaft of the combined lever with a punch to make the combined lever body play an insurance role for the small shaft; For the other end of the roller after the pin shaft is installed, turn the entire combined lever over and repeat S230 - S240 to complete the assembly of the roller.

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