Reversing device for aero-engine core engine

Abstract

The reversing device for the aero-engine core engine comprises a hanging ring and a connecting column which are sequentially arranged from top to bottom, an error-preventing positioning hole frame is arranged on the outer wall of the upper portion of the connecting column, a limiting clamping jaw is arranged on the lower portion of the connecting column, and a transmission rod which is arranged in a sliding mode in the vertical direction is arranged in a column body of the connecting column. When the transmission rod is located at the lowest position, the lower portion of the transmission rod can extrude the inner end of the limiting clamping jaw, and a transmission rod sliding control mechanism is further arranged on the upper portion of the connecting column. The technical problems that before reversing, fastening nuts are inconvenient to install, and after reversing, the fastening nuts of the core machine cannot be disassembled when the core machine is located in an advanced whole machine assembly working platform are solved.

Description

Technical Field

[0001] The invention relates to a field, in particular to a reversing device for an aircraft engine core machine. Background Art

[0002] The subassembly of aircraft engines is an important part of aircraft engine maintenance. After the transmission disassembly of a certain type of aircraft engine is completed, the core engine assembly needs to be adjusted to the core engine base for disassembly. This process requires the use of a reversing device. The reversing device is used in conjunction with the fastening nut to "clamp" the core engine assembly in the middle, and then the reversing device is connected with a crane to lift it and adjust the core engine assembly to the core engine base.

[0003] When using the existing reversing device, on the one hand, when subassembling the fastening nuts, it is necessary to drill under the core engine assembly to tighten them manually. The space below is small and can only be entered by crouching, which requires extremely high difficulty for personnel to operate; on the other hand, with the continuous improvement of the aircraft engine subassembly process, the core engine assembly disassembly operation is currently carried out using the whole machine assembly work platform (see Figure 1 ), due to the relative "closedness" of the working platform below, after the core engine is reversed, personnel cannot enter under the engine to disassemble the tightening nuts.

[0004] Therefore, it is necessary to improve the existing reversing device in view of the above-mentioned defects. Summary of the invention

[0005] The purpose of the present invention is to provide a reversing device for an aircraft engine core machine, which solves the technical difficulties of inconvenient installation of fastening nuts before reversing and inability to disassemble the core machine fastening nuts when the core machine is in an advanced complete machine assembly work platform after reversing.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A reversing device for an aircraft engine core machine comprises a lifting ring and a connecting column arranged in sequence from top to bottom, wherein the outer wall of the upper part of the connecting column is provided with an anti-error positioning hole frame, and the lower part of the connecting column is provided with a limit claw. A transmission rod slidably arranged in a vertical direction is provided in the column body of the connecting column, and when the transmission rod is at the lowest position, its lower part can squeeze the inner end of the limit claw, and the upper part of the connecting column is also provided with a transmission rod sliding control mechanism.

[0007] The rear installation edge above the core engine is used as the axial positioning reference, and the original center axis is replaced by a connecting column, a transmission rod and a limit claw. The transmission rod sliding control mechanism above the connecting column pushes the transmission rod in the center to slide up and down, thereby controlling the opening and closing of the limit claw. The core engine reversing device can be loaded and unloaded in one click without disassembling the fastening nut. The fixing bolt installation at the bottom of the error-proofing positioning hole frame is provided with an error-proofing positioning hole to avoid jamming or assembly errors during assembly.

[0008] As a further preferred embodiment of the present invention, the anti-error positioning hole frame includes an oblique brace, an annular support plate and an arc-shaped positioning hole plate. The oblique brace is evenly arranged around the outer wall of the connecting column, and the oblique brace is inclined downward outward from the connecting column. The annular support plate is horizontally arranged at the bottom of the oblique brace. There are four arc-shaped positioning hole plates, and the four arc-shaped positioning hole plates are respectively arranged at four positions on the outer end surface of the annular support plate. The plate body of the arc-shaped positioning hole plate is evenly provided with anti-error positioning holes along the vertical direction.

[0009] When reversing the core engine assembly, rotate the assembly vehicle to make the high-pressure turbine vertically upward, install the reversing device, tighten the fastening nut to make the guide boss fall into the third-stage disc shaft of the high-pressure compressor, and use the process nut to connect the anti-error positioning hole of the reversing device with the rear installation edge of the core engine assembly.

[0010] As a further preferred embodiment of the present invention, the upper portion of the transmission rod is connected to a sliding plate in the connecting column, and the sliding plate is connected to a transmission rod sliding control mechanism.

[0011] As a further preferred embodiment of the present invention, the transmission rod sliding control mechanism includes a horizontal sliding rod, a sliding opening, an upward fixing hole, a downward pressing fixing hole and an adjustment pull rod. The sliding opening is opened on both sides of the upper part of the connecting column, and the sliding opening is opened in the vertical direction. The horizontal sliding rod is arranged on both sides of the sliding plate in the horizontal direction. The diameter of the horizontal sliding rod is smaller than the width of the sliding opening. The upward fixing hole and the downward pressing fixing hole are respectively opened at the upper end of the sliding opening and the lower end of the sliding opening. The diameters of the upward fixing hole and the downward pressing fixing hole are the same and are both larger than the width of the sliding opening. The adjustment pull rod is arranged at both ends of the horizontal sliding rod, and the adjustment pull rod is adapted to the upward fixing hole and the downward pressing fixing hole.

[0012] When the sliding plate moves up, the transmission rod is lifted, and its bottom is separated from the inner end of the limit claw, and the limit claw is retracted. After the limit claw is fully retracted, the adjustment rod moves inwardly into the lifting fixed hole for limiting. This adjustment method is simple and convenient and quick to adjust.

[0013] As a further preferred embodiment of the present invention, the adjusting rod is adjusted to the outermost end and its inner end is located outside the outer wall of the connecting column, and a spring structure is provided between the adjusting rod and the horizontal sliding rod.

[0014] As a further preferred embodiment of the present invention, the limiting claw is connected to the connecting column via an inner sleeve structure, and the inner sleeve structure and the connecting column are interference fit.

[0015] The broken limit claw can be replaced by replacing the inner sleeve structure.

[0016] As a further preferred embodiment of the present invention, the claw body of the limiting claw is rotatably connected to the lower part of the inner sleeve structure, and when the limiting claw is retracted, its outermost end is located within the horizontal projection range of the connecting column, and when the limiting claw is opened, its outermost end is located outside the horizontal projection range of the connecting column.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: 1. Take the rear installation edge above the core engine as the axial positioning reference, use the connecting column, transmission rod and limit claw to replace the original center axis, push the transmission rod in the center to slide up and down through the transmission rod sliding control mechanism above the connecting column, so as to control the opening and closing of the limit claw, and complete the loading and unloading process of the core engine reversing device with "one-click" without disassembling the fastening nut. The fixing bolt installation at the bottom of the anti-error positioning hole frame is equipped with an anti-error positioning hole to avoid jamming or assembly errors during assembly.

[0018] 2. Improve the convenience of reversing the core engine components and reduce the difficulty of operation for personnel.

[0019] 3. When reversing the core engine assembly, rotate the assembly vehicle so that the high-pressure turbine is vertically upward, install the reversing device, tighten the fastening nut, so that the guide boss falls into the third-stage disc shaft of the high-pressure compressor, and use the process nut to connect the anti-error positioning hole of the reversing device with the rear installation edge of the core engine assembly.

[0020] 4. When the adjustment rod is moved outward, it will not completely separate from the horizontal sliding rod. When the inner end of the adjustment rod is located at the opening of the upper lifting fixed hole or the lower pressing fixed hole, the horizontal sliding rod can be moved up and down by adjusting the rod, and the horizontal sliding rod can drive the sliding plate to move up and down. When the sliding plate moves down, the transmission rod is pressed down, and its bottom presses down the inner end of the limit claw, and the limit claw opens. After the limit claw is fully opened, the adjustment rod moves inward into the lower pressing fixed hole for limiting. When the sliding plate moves up, the transmission rod is lifted, and its bottom separates from the inner end of the limit claw, and the limit claw is retracted. After the limit claw is fully retracted, the adjustment rod moves inward into the upper lifting fixed hole for limiting. This adjustment method is simple and easy to adjust.

[0021] 5. It is convenient to replace the broken limit claw by replacing the inner sleeve structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the work platform for assembling the whole machine.

[0023] Figure 2 A three-dimensional diagram of the present invention.

[0024] Figure 3 It is a schematic diagram of the connection structure of the present invention.

[0025] Figure 4 It is a side view of the upper part of the connecting column of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Specific embodiment 1: Figure 1 , Figure 2 , Figure 3 , Figure 4 A reversing device for an aircraft engine core is shown, comprising a lifting ring 1 and a connecting column 2 arranged in sequence from top to bottom, an outer wall of the upper part of the connecting column 2 is provided with an error-proof positioning hole frame 3, a limit clamping claw 4 is provided at the lower part of the connecting column 2, a transmission rod 5 slidably arranged in a vertical direction is provided in the column body of the connecting column 2, and when the transmission rod 5 is at the lowest position, its lower part can squeeze the inner end of the limit clamping claw 4, and a transmission rod sliding control mechanism is also provided at the upper part of the connecting column 2; The error-proof positioning hole frame 3 includes an oblique support 31, an annular support plate 32 and an arc-shaped positioning hole plate 33. The oblique support 31 is evenly arranged around the outer wall of the connecting column 2. The oblique support 31 is arranged outwardly and downwardly from the connecting column. The annular support plate 32 is horizontally arranged at the bottom of the oblique support 31. There are four arc-shaped positioning hole plates 33, which are respectively arranged at four positions of the outer end surface of the annular support plate 32. The plate body of the arc-shaped positioning hole plate 33 is evenly provided with error-proof positioning holes along the vertical direction. The upper part of the transmission rod 5 is connected to the sliding plate 6 in the connecting column 2, and the sliding plate 6 is connected to the transmission rod sliding control mechanism; The transmission rod sliding control mechanism includes a horizontal sliding rod 7, a sliding opening 8, an upward-lifting fixed hole position 9, a downward-pressing fixed hole position 10 and an adjusting pull rod 11. The sliding opening 8 is opened on both sides of the upper part of the connecting column 2, and the sliding opening 8 is opened in the vertical direction. The horizontal sliding rod 7 is arranged on both sides of the sliding plate 6 in the horizontal direction. The diameter of the horizontal sliding rod 7 is smaller than the width of the sliding opening 8. The upward-lifting fixed hole position 9 and the downward-pressing fixed hole position 10 are respectively opened at the upper end of the sliding opening 8 and the lower end of the sliding opening 8. The diameters of the upward-lifting fixed hole position 9 and the downward-pressing fixed hole position 10 are the same and are both larger than the width of the sliding opening 8. The adjusting pull rod 11 is arranged at both ends of the horizontal sliding rod 7, and the adjusting pull rod 11 is adapted to the upward-lifting fixed hole position 9 and the downward-pressing fixed hole position 10; The adjusting rod 11 is adjusted to the outermost end with its inner end located outside the outer wall of the connecting column 2, and a spring structure is provided between the adjusting rod 11 and the horizontal sliding rod 7; The limiting claw 4 is connected to the connecting column 2 via an inner sleeve structure 12, and there is interference fit between the inner sleeve structure 12 and the connecting column 2; The claw body of the limiting claw 4 is rotatably connected to the lower part of the inner sleeve structure 12. When the limiting claw 4 is retracted, its outermost end is located within the horizontal projection range of the connecting column 2. When the limiting claw 4 is opened, its outermost end is located outside the horizontal projection range of the connecting column 2.

[0033] The specific steps of reversing with the above device are as follows: S1. Rotate the assembly vehicle to make the high-pressure turbine vertically upward, assemble the reversing device and tighten the fastening nuts of various parts on the reversing device, let the guide boss fall into the third-stage disc shaft of the high-pressure compressor, and use the process nut to connect the error-proof positioning hole of the reversing device with the rear installation edge of the core engine assembly; S2. Adjust the upper adjustment lever from the upward fixing hole position to the downward fixing hole position, push the transmission rod in the center to extend, open the limit claw, contact with the fastening nut at the front end of the core engine assembly and receive force; S3. Use the lifting rings of the crane and the reversing device to lift the core engine assembly and adjust the reversing device to the core engine base / complete machine assembly work platform; S4. After reversing, adjust the upper adjustment lever from the downward pressing fixed hole position to the upward lifting fixed hole position, so that the transmission rod in the center part contracts and the limit claw closes; S5. Use a socket wrench to separate the process nut parts, use a crane to remove the reversing device, and complete the assembly of the remaining parts of the core engine assembly.

[0034] When performing the above step S2, if it is found that the limit claw cannot be fully opened, check the distance between the upper fixing hole position and the lower fixing hole position, and re-drill the hole for correction according to the product size.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reversing device for an aircraft engine core machine, characterized in that: The invention comprises a lifting ring (1) and a connecting column (2) which are arranged in sequence from top to bottom, wherein the outer wall of the upper part of the connecting column (2) is provided with an anti-error positioning hole frame (3), and the lower part of the connecting column (2) is provided with a limit claw (4). A transmission rod (5) which is slidably arranged in a vertical direction is provided in the column body of the connecting column (2), and when the transmission rod (5) is at the lowest position, its lower part can squeeze the inner end of the limit claw (4), and the upper part of the connecting column (2) is also provided with a transmission rod sliding control mechanism.

2. The reverse device for an aircraft engine core according to claim 1, characterized in that: The error-proof positioning hole frame (3) comprises an oblique support (31), an annular support plate (32) and an arc-shaped positioning hole plate (33); the oblique support (31) is evenly arranged around the outer wall of the connecting column (2); the oblique support (31) is arranged outwardly and downwardly from the connecting column; the annular support plate (32) is horizontally arranged at the bottom of the oblique support (31); there are four arc-shaped positioning hole plates (33); the four arc-shaped positioning hole plates (33) are respectively arranged at four positions of the outer end surface of the annular support plate (32); and the plate body of the arc-shaped positioning hole plate (33) is evenly provided with error-proof positioning holes along the vertical direction.

3. The reverse device for an aircraft engine core according to claim 1, characterized in that: The upper part of the transmission rod (5) is connected to a sliding plate (6) in the connecting column (2), and the sliding plate (6) is connected to a transmission rod sliding control mechanism.

4. The reverse device for an aircraft engine core according to claim 3, characterized in that: The transmission rod sliding control mechanism comprises a horizontal sliding rod (7), a sliding opening (8), an upward lifting fixed hole position (9), a downward pressing fixed hole position (10) and an adjusting rod (11). The sliding opening (8) is opened on both sides of the upper part of the connecting column (2), and the sliding opening (8) is opened in the vertical direction. The horizontal sliding rod (7) is arranged on both sides of the sliding plate (6) in the horizontal direction. The diameter of the horizontal sliding rod (7) is smaller than the width of the sliding opening (8). The upward lifting fixed hole position (9) and the downward pressing fixed hole position (10) are respectively opened at the upper end of the sliding opening (8) and the lower end of the sliding opening (8). The diameters of the upward lifting fixed hole position (9) and the downward pressing fixed hole position (10) are the same and both are larger than the width of the sliding opening (8). The adjusting rod (11) is arranged at both ends of the horizontal sliding rod (7), and the adjusting rod (11) is adapted to the upward lifting fixed hole position (9) and the downward pressing fixed hole position (10).

5. The reverse device for an aircraft engine core according to claim 4, characterized in that: The adjusting rod (11) is adjusted to the outermost end and its inner end is located outside the outer wall of the connecting column (2). A spring structure is provided between the adjusting rod (11) and the horizontal sliding rod (7).

6. The reverse device for an aircraft engine core according to claim 1, characterized in that: The limiting claw (4) is connected to the connecting column (2) via an inner sleeve structure (12), and an interference fit is formed between the inner sleeve structure (12) and the connecting column (2).

7. The reverse device for an aircraft engine core according to claim 6, characterized in that: The claw body of the limit claw (4) is rotatably connected to the lower part of the inner sleeve structure (12); when the limit claw (4) is retracted, its outermost end is located within the horizontal projection range of the connecting column (2); when the limit claw (4) is opened, its outermost end is located outside the horizontal projection range of the connecting column (2).

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