Rotary driving type miniature turbojet engine case dismounting device with automatic center searching and centering function

Abstract

The invention discloses a rotary driving type miniature turbojet engine case dismounting device with an automatic centering function. The rotary driving type miniature turbojet engine case dismounting device comprises a shell, an inner ring, a screw rod, a self-lubricating copper pad, a lateral screw, an upper check ring and a check ring. The inner wall of the shell is provided with a gradually-changed guide edge distributed in the circumferential direction, large-gap convenient insertion is achieved when the cartridge receiver is installed, radial constraint self-adaptive adjustment is achieved when the cartridge receiver rotates, finally small-gap concentric centering is achieved, and the damage risk caused by traditional manual positioning deviation is avoided. The lateral screw is matched with the straight groove of the shell to prevent following rotation of the inner ring and axially limit the inner ring, so that smooth transmission, safety and disengagement prevention are ensured. The self-lubricating copper pad replaces a bearing, and low-friction buffering protection is provided. The inner ring is driven to axially move by rotating the screw rod, the turbine guider is jacked, the shell pulling casing is jacked up, and lossless separation is achieved. The device is efficient, safe and simple in structure, the maintenance efficiency of the micro turbojet engine is remarkably improved, and the service life of parts is prolonged.

Description

Technical Field

[0001] This invention relates to the field of aircraft engine maintenance tool technology, specifically to a rotary-driven micro turbojet engine casing disassembly device with automatic centering and alignment function. Background Technology

[0002] In the repair, maintenance, or parts replacement of micro turbojet engines, disassembly of the casing is a critical operation. For example... Figure 10-13 As shown, due to the compact structure of micro turbojet engines, the casing and surrounding components such as turbine guides are usually fitted with small clearances. Traditional disassembly methods often involve manual operation using tools such as hammering and pry bars. Furthermore, some disassembly devices require additional bearings to ensure smooth transmission, and there is a lack of protective design against the "separation of the inner ring from the outer shell".

[0003] However, this traditional method has five major drawbacks: 1. Manual operation is difficult to control precisely, which can easily damage precision components such as the casing and turbine guide, affecting engine performance and service life; 2. Disassembly efficiency is low, and it is difficult to complete the operation smoothly when the fit is tight; 3. Lack of a dedicated alignment structure: When the casing is installed into the disassembly device, it needs to be manually positioned precisely. If the positioning is off, it will not only increase the difficulty of installation (large gaps cannot be installed, small gaps cannot be aligned), but also lead to uneven force during subsequent disassembly, further increasing the risk of component damage; 4. Complex transmission structure: Traditional devices rely on bearings to achieve smooth rotation of the screw and inner ring, increasing structural complexity and cost; 5. Insufficient protection: There is no over-travel anti-disengagement design for the inner ring, which can easily lead to problems such as component separation and loss or falling parts injuring personnel after disassembly.

[0004] Therefore, there is an urgent need for a special device for disassembling the casing of a micro turbojet engine that can achieve automatic centering and alignment, and is safe, efficient and non-destructive. Summary of the Invention

[0005] The purpose of this invention is to provide a special device for disassembling the casing of a micro turbojet engine that can achieve automatic centering and alignment, and is safe, efficient and non-destructive.

[0006] To achieve the above objectives, the present invention proposes the following technical solution: a rotary-driven micro turbojet engine casing disassembly device with automatic centering and alignment function, comprising: The outer casing, including the flange used to position the top of the housing; The inner ring is disposed inside the outer casing; The screw is threadedly connected to the inner ring, and the screw is movably fitted with the outer shell, so that the screw can drive the outer shell to move. Two copper pads, one on the top and one on the bottom, are respectively located on the top and bottom sides of the outer casing, and the screw passes through the two copper pads. A lateral screw is installed on the inner ring, and a limiting groove is provided on the outer shell. The lateral screw can slide within the limiting groove and is used to limit the rotation of the inner ring. The upper retaining ring is disposed on the outer shell and presses down the copper pad. The upper retaining ring is connected to the screw rod by a positioning screw. The retaining ring is connected to the bottom of the housing by two positioning screws and cooperates with the flange at the top of the housing to position the bottom of the housing.

[0007] Preferably, the retaining ring includes a plurality of first flange inlets and a plurality of first flange limiting edges, wherein the first flange limiting edges are used to lock and position the casing flange; The housing includes multiple second flange inlets and multiple second flange limiting edges, the second flange limiting edges limiting the displacement of the casing flange; The second flange inlet has a gradient guide edge; The length of the second flange inlet is greater than the length of the first flange inlet, and the length of the second flange limiting edge is less than the length of the first flange limiting edge; The first flange inlet and the second flange inlet form the inlet of the casing flange. After rotating the outer shell, the first flange limiting edge and the second flange limiting edge form a limiting force on the casing flange.

[0008] Preferably, the number of the first flange inlet, the first flange limiting edge, the second flange inlet, and the second flange limiting edge is equal to the number of the top flange of the casing.

[0009] Preferably, the top of the outer casing has a top hole.

[0010] Preferably, the screw includes a screw head, a frustum, a lower retaining ring and a threaded post, which are fixedly connected from top to bottom. The frustum passes through the top hole and has a screw hole that matches the positioning screw. The lower retaining ring is used to support the lower copper pad, and the upper and lower copper pads are in close contact with the top of the outer shell.

[0011] The threaded post is connected to the inner ring thread.

[0012] Preferably, the inner ring has mounting holes adapted to the lateral screws: When the screw rotates, the lateral screw, through its engagement with the limiting groove, prevents the inner ring from rotating along with it, thereby converting the screw's rotational motion into axial linear motion. After disassembly, the inner ring is axially limited by the limiting groove to prevent the inner ring from detaching from the outer shell.

[0013] Preferably, the copper pad is a self-lubricating copper pad made of copper. With the self-lubricating properties of copper, the self-lubricating copper pad achieves low-friction smooth transmission when the screw and the inner ring rotate relative to each other, thus replacing the bearing structure and providing buffer protection for the contact surface to avoid hard contact wear.

[0014] Preferably, the threaded connection between the screw and the inner ring is a fine thread.

[0015] Preferably, the number of positioning screws is four.

[0016] Preferably, the lower bottom surface of the inner ring abuts against the turbine guide of the engine, driving the screw to rotate. Under the anti-rotation action of the lateral screw, the screw moves upward, and the upward movement of the screw drives the outer casing to move. The outer casing, in conjunction with the retaining ring, pulls the casing flange, thereby realizing the separation of the casing from the turbine guide. Four weight-reducing circular holes are provided on the top of the inner ring (4) to reduce the weight of the inner ring (4) itself. This avoids the need for a large driving force to drive the mechanism to rotate when the inner ring (4) has a large static friction due to its own weight when disassembling and starting to drive the thread. In addition, it can further reduce the weight of the device and improve the human-machine adaptability.

[0017] Beneficial effects: The technical solution of this application has the following technical effects: 1. Achieving automatic centering and alignment, fundamentally solving the problems of positioning deviation and damage. The core innovation of this invention lies in the gradient guide edge on the inner wall of the outer shell. This structure ingeniously achieves the unique functions of "easy installation with large gaps, adaptive rotational guidance, and precise centering with small gaps." This completely solves the technical pain point of traditional disassembly devices that require repeated and precise manual pre-positioning, avoids installation difficulties caused by positioning deviations, and fundamentally eliminates the significant risk of eccentric forces generated during disassembly due to inaccurate positioning, leading to uneven stress and causing compression, deformation, or scratches to precision components such as the casing and turbine guide.

[0018] 2. Achieving self-lubricating transmission and reliably replacing traditional bearings. This invention uses a self-lubricating copper pad to replace traditional rolling bearings. Utilizing the excellent self-lubricating properties and elasticity of copper, it ensures low friction and high smoothness during relative rotation between the screw and the inner ring, preventing transmission jamming, and also provides buffering protection to avoid rigid contact wear. This design, while ensuring transmission performance, significantly simplifies the overall structure of the device, reduces its size and weight, and substantially lowers manufacturing costs, assembly difficulty, and subsequent maintenance costs.

[0019] 3. Achieves dual protection against rotation and detachment. This invention integrates two key functions into a simple structure through the ingenious combination of the lateral screw and the straight groove in the outer casing: The anti-rotation protection ensures power supply. It effectively prevents the inner ring from "rotating" during screw drive, ensuring that 100% of the rotational power is effectively converted into the axial linear motion required for disassembly.

[0020] The anti-detachment feature ensures safety; after disassembly, it acts as a mechanical limiter to prevent the inner ring from accidentally separating from or slipping off the outer shell. This not only ensures the integrity of the device and prevents component loss, but also completely avoids the major safety hazard of internal components falling and injuring operators or damaging precision workpieces below. It achieves efficient and non-destructive disassembly, and is convenient and reliable to operate.

[0021] 4. Due to the inherent characteristics of the mechanism, the outer ring moves upward relative to the inner ring, while the inner ring's gravity moves downward. The positive pressure of the inner ring relative to the screw thread is downward. Reducing the weight of the inner ring can reduce the frictional force when the screw is driven to rotate, making disassembly of the drive easier.

[0022] In summary, this invention provides a smooth and controllable disassembly force through a rotary drive screw, combined with an automatic centering function to ensure uniform axial force distribution. This completely replaces the traditional, easily damaging, and rough methods such as "knocking, prying, and pulling," achieving efficient and non-destructive disassembly of the casing. The entire operation process ("installation-rotational centering-drive disassembly") is coherent and clear, and can be operated by a single person, greatly improving the efficiency, quality, and safety of maintenance and repair of micro turbojet engines.

[0023] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below can be considered part of the inventive subject matter of this disclosure, provided that such concepts do not contradict each other.

[0024] The foregoing and other aspects, embodiments, and features of the teachings of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0025] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the invention will now be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the bottom structure of the present invention; Figure 3 This is a side sectional view of the present invention.

[0026] Figure 4This is a schematic diagram of the casing installation device of the present invention (installed and ready to be disassembled). Figure 5 This is a schematic diagram of the retaining ring, inner ring, and screw of the present invention; Figure 6 This is a schematic diagram of the outer casing of the present invention.

[0027] Figure 7 This is a schematic diagram of the screw, copper washer, and upper retaining ring of the present invention; Figure 8 This is an exploded view of the present invention; Figure 9 This is an exploded view of the present invention.

[0028] Figure 10 This is a schematic diagram of the engine casing of the present invention; Figure 11 This is a schematic diagram of the engine casing of the present invention; Figure 12 This is a schematic diagram of the engine casing of the present invention.

[0029] Figure 13 This is a schematic diagram of the engine casing flange installation and locking process of the present invention.

[0030] Figure 14 Schematic diagram of the gradient guide edge of the second flange inlet. In the figure, the meanings of the various reference numerals are as follows: 1. Retaining ring; 2. Lateral screw; 3. Outer shell; 4. Inner ring; 5. Screw; 6. Copper washer; 7. Upper retaining ring; 8. Positioning screw one; 9. Positioning screw two; 10. Limiting groove; 101. First flange inlet; 102. First flange limiting edge; 301. Second flange inlet; 302. Second flange limiting edge; 501. Screw rotor; 502. Frustum; 503. Lower retaining ring; 504. Threaded post; 5021. Screw hole. Detailed Implementation

[0031] The embodiments of the invention are described in detail below with reference to the accompanying drawings to clearly illustrate the structure, purpose, advantages, positional relationships, and connection methods of each component. It should be noted that the directional indications (such as "front," "back," "up," and "down") involved in this embodiment are based on the posture shown in the drawings and are only used to describe the relative positional relationships and movement of the components. If the posture changes, the directional indications will be adjusted accordingly. The term "connection" includes mechanical connections and electrical connections, and can be fixed connections, detachable connections, or indirect connections through an intermediate medium. The specific meaning is understood by those skilled in the art based on the context.

[0032] like Figure 1-14As shown, this embodiment provides a rotary-driven micro turbojet engine casing disassembly device with automatic centering function. This device mainly consists of a retaining ring 1, lateral screws 2, a housing 3, an inner ring 4, a screw 5, a copper washer 6, and an upper retaining ring 7.

[0033] The retaining ring 1 includes multiple first flange inlets 101 and multiple first flange limiting edges 102, the first flange limiting edges 102 being used to lock and position the casing flange; like Figure 2 The housing 3 includes multiple second flange inlets 301 and multiple second flange limiting edges 302, the second flange limiting edges 302 restricting the displacement of the housing flange; the top of the housing 3 is provided with a top hole 303.

[0034] The second flange inlet 301 has a gradient guide edge, the radius of which decreases from large to small, with a smaller radius at the inner end; for example... Figure 14 .

[0035] The length of the second flange inlet 301 is greater than the length of the first flange inlet 101, and the length of the second flange limiting edge 302 is less than the length of the first flange limiting edge 102; for example Figure 2 .

[0036] The first flange inlet 101 and the second flange inlet 301 form the inlet of the casing flange. After rotating the outer casing 3, the first flange limiting edge 102 and the second flange limiting edge 302 limit the casing flange.

[0037] The number of the first flange inlet 101, the first flange limiting edge 102, the second flange inlet 301, and the second flange limiting edge 302 is equal to the number of flanges on the top of the casing. The core innovation of this embodiment is the use of a gradient guide edge. The purpose of this design is to achieve automatic centering and large-gap installation. The design of the first flange inlet 101 and the second flange inlet 301 ensures that the casing flange to be disassembled forms a large assembly gap with the inlet of the outer shell 3 during installation. The gradient guide edge of the second flange inlet 301 gradually locks the casing flange in place. Figure 13 .

[0038] The advantage is that it is easy to install. Operators do not need to perform high-precision manual positioning. They can easily and quickly insert the casing flange into the device, which greatly reduces the installation difficulty and operation threshold.

[0039] When the operator rotates the housing 3, the casing flange will come into contact with the gradually decreasing radius guide edge, i.e., the second flange inlet 301. The inclined surface of the guide edge will generate a uniform radial constraint force on the flange, forcing the casing flange to "adaptively move" along the guide constraint direction, automatically correcting the eccentricity at the initial installation, i.e., rotational guidance.

[0040] When the outer casing 3 is rotated into place, the casing flange is completely constrained by the "small inner end radius" part of the guide edge of the second flange inlet 301. At this time, the casing flange and the inner circle of the inner ring 4 form a precise small gap concentric fit, that is, precise centering.

[0041] This function fundamentally solves the core problem of uneven force caused by positioning deviation in traditional disassembly, which in turn damages components such as the casing and turbine guide, and is a key prerequisite for achieving subsequent non-destructive disassembly.

[0042] The inner ring 4 is located inside the outer casing 3, and has a threaded hole in its center, forming a threaded connection with the screw 5. The inner ring 4 is the core component for transmitting and executing disassembly actions. During disassembly, the inner ring 4 is driven by the screw 5 and moves axially. Its upper surface is used to lift the outer casing 3, and its lower surface is used to hold the turbine guide of the engine.

[0043] By simultaneously "holding" the turbine guide and "lifting" the housing 3, and then the housing 3 pulling the casing through the retaining ring 1, relative movement between the casing and the turbine guide is achieved, thereby achieving the purpose of disassembly. The structure is simple, the force is directly applied, and it ensures that the disassembly force is uniformly transmitted along the axial direction.

[0044] The screw 5 passes through the inner ring 4 and the outer shell 3, and its threaded portion mates with the internal threaded hole of the inner ring 4. The screw 5 is the power input source of the device, used to convert the operator's rotational torque into axial thrust. In this embodiment, the threaded connection between the screw 5 and the inner ring 4 is preferably a fine-pitch thread.

[0045] The improved transmission precision allows for more accurate control of disassembly force; the enhanced self-locking performance prevents accidental loosening or reversal due to vibration or force during disassembly, thus improving operational safety.

[0046] Specifically, such as Figure 7 The screw 5 includes a screw head 501, a truncated cone 502, a lower retaining ring 503 and a threaded post 504, which are fixedly connected from top to bottom. The truncated cone 502 passes through the top hole 303 and has a screw hole 5021 that is compatible with the positioning screw 8. The lower retaining ring 503 is used to support the lower copper pad 6, and the upper and lower copper pads 6 are in close contact with the top of the outer casing 3.

[0047] The threaded post 504 is threaded to the inner ring 4.

[0048] Furthermore, the inner ring 4 is provided with mounting holes that are compatible with the lateral screws 2: When the screw 5 rotates, the lateral screw 2, through its cooperation with the limiting slide groove 10, prevents the inner ring 4 from rotating, thereby converting the rotational motion of the screw 5 into axial linear motion; After disassembly, the inner ring 4 is axially limited by the limiting groove 10 to prevent the inner ring 4 from separating from the outer shell 3.

[0049] The lateral screw 2 has a function of preventing rotation. When the operator drives the screw 5 to rotate, the screw 5 attempts to rotate the inner ring 4 together. However, at this time, the side of the lateral screw 2 will abut against the groove wall of the limiting slide groove 10 of the outer casing 3, and this constraint force prevents the inner ring 4 from rotating circumferentially.

[0050] This ensures that the "rotational motion" is necessarily and efficiently converted into the "axial linear motion" of the screw 5. The screw 5 drives the outer casing 3 to move upward, which is a necessary condition for realizing the disassembly function, namely, the relative motion between the inside and outside.

[0051] Function 2: Prevents detachment. The lateral screw 2 is always confined within the limiting groove 10 of the outer casing 3. Even after disassembly is complete and the constraint force of the screw 5 disappears, the screw still acts as a mechanical limiter, preventing the inner ring 4 from sliding out of the outer casing 3 due to gravity or inertia. This ensures the integrity of the device's components and prevents loss, while also avoiding the safety risks of falling parts injuring operators or precision workpieces.

[0052] Furthermore, this embodiment includes two copper pads 6, one upper and one lower, which are respectively disposed on the upper and lower sides of the top of the outer casing 3. The screw 5 passes through the two copper pads 6. The top of the upper copper pad 6 contacts the upper retaining ring 7, and the bottom of the upper copper pad 6 contacts the outer top of the outer casing 3. The bottom of the lower copper pad 6 contacts the lower retaining ring 503, and the top of the lower copper pad 6 contacts the inner top of the outer casing 3. This forms a transmission structure consisting of the copper pad 6, the upper retaining ring 7, the lower retaining ring 503, and the positioning screw 8. This structure does not affect the rotation of the screw 5, but can still transmit power, allowing the screw 5 to drive the outer casing 3 to move.

[0053] The copper pad 6 has a thickness of 2-3mm and a surface roughness Ra≤0.4μm. No additional coating treatment is required, and the original self-lubricating properties of copper are utilized directly. Its inner diameter matches the outer diameter of the screw 5 (gap ≤0.01mm), and its outer diameter matches the groove on the inner ring end face, ensuring no radial movement after assembly.

[0054] In this embodiment, the copper pad 6 is a self-lubricating copper pad made of pure copper, intended to replace traditional rolling bearings. Due to the self-lubricating properties of copper, when the screw 5 rotates and the housing 3 remains stationary, they can achieve smooth, low-friction relative rotation, avoiding transmission jamming. No additional complex bearing structure is required, resulting in a simpler, smaller, and lighter overall device structure. This reduces the number of parts and lowers procurement and manufacturing costs. The relatively soft texture of copper prevents hard contact wear between the screw 5 and the housing 3, providing a degree of cushioning protection.

[0055] The working process of this device is divided into two stages: "automatic centering" and "rotation-driven disassembly". "Automatic centering" is the prerequisite for achieving non-destructive disassembly.

[0056] Phase 1: Automatic Centering Process Large gap installation, Figure 4 Illustration: The operator aligns the rear flange of the engine casing to be disassembled with the inlet end of the outer casing 3 of this device, on the side where the retaining ring 1 is located. Since the inner wall of the second flange inlet 301 of the outer casing 3 is a gradient guide edge, its radius at the inlet end is designed to be larger than the outer diameter of the casing flange, forming a large gap between the two. The casing can be quickly and easily inserted into the device without repeated manual alignment.

[0057] Rotate the guide, holding the housing 3 slowly clockwise or counterclockwise, rotating it a small angle according to the guide edge design. During this process, the outer circle of the housing flange begins to contact the guide edge with a gradually changing radius.

[0058] The inclined surface of the guide edge applies a uniform radial constraint force to the casing flange, forcing the eccentric casing flange to automatically adjust towards the center.

[0059] Continue rotating the outer casing 3 until the casing flange is completely fitted with the smallest radius segment of the guide edge (the inner end with the smaller radius). At this point, the casing flange and the inner circle of the inner ring 4 automatically achieve a small-gap concentric fit. Simultaneously, the retaining ring 1 fixed on the outer casing 3 also rotates into place, locking the lower end face of the casing flange and completing the limiting and fixing.

[0060] Phase Two: Rotary Drive Disassembly Process After achieving precise alignment, the operator uses tools such as a wrench to drive the screw 5 to rotate. As the screw 5 rotates, the copper washer 6 provides self-lubrication, ensuring smooth and unobstructed relative rotation between the screw 5 and the inner ring 4. At the same time, the lateral screw 2 is constrained in the straight groove of the outer casing 3, preventing the inner ring 4 from "following" the screw 5.

[0061] Since the inner ring 4 cannot rotate, the rotation of the screw 5 is achieved through the fine-pitch thread pair. When the screw 5 moves upward, the lower surface of the inner ring 4 presses against the turbine guide of the engine. At the same time, the upward movement of the screw 5 drives the outer casing 3 to move upward through the copper pad 6 and the upper retaining ring 7. The outer casing 3 then drives the retaining ring 1 on it to move upward synchronously. The retaining ring 1 then pulls the already aligned and locked casing flange, causing the casing to move upward together.

[0062] Finally, under the relative motion of "turbine guide 9 being held in place" and "casing 8 being pulled upward", the casing 8 and turbine guide 9 are safely and smoothly separated, achieving non-destructive disassembly.

[0063] After disassembly, the lateral screw 2 remains confined within the straight groove to prevent the inner ring 4 from falling out of the outer casing 3.

[0064] This embodiment, through the synergistic effect of the above structure, especially the gradient guide edge, self-lubricating copper pad, and multi-functional side screw, perfectly solves the problems of difficult positioning, easy damage, complex structure, and poor safety in traditional disassembly, and achieves safe, efficient, and non-destructive disassembly of the casing.

[0065] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A rotary-driven micro turbojet engine casing disassembly device with automatic centering and alignment function, characterized in that, include: The outer casing (3) has a flange for positioning the top of the casing; The inner ring (4) is disposed inside the outer casing (3); The screw (5) is threadedly connected to the inner ring (4), and the screw (5) is movably engaged with the outer shell (3). The screw (5) can drive the outer shell (3) to move. Two copper pads (6) are set on the upper and lower sides of the top of the outer shell (3), and the screw (5) passes through the two copper pads (6). A lateral screw (2) is installed on the inner ring (4), and a limiting groove (10) is provided on the outer shell (3). The lateral screw (2) can slide in the limiting groove (10). The lateral screw (2) is used to limit the rotation of the inner ring (4). Upper retaining ring (7) is set on the outer shell (3) and presses down the copper pad (6). The upper retaining ring (7) is connected to the screw (5) by a positioning screw (8). The retaining ring (1) is connected to the bottom of the housing (3) by positioning screw two (9) and cooperates with the flange on the top of the housing (3) to position the bottom of the housing (3).

2. The apparatus according to claim 1, characterized in that, The retaining ring (1) includes multiple first flange inlets (101) and multiple first flange limiting edges (102), the first flange limiting edges (102) being used to lock and position the casing flange; The housing (3) includes a plurality of second flange inlets (301) and a plurality of second flange limiting edges (302), the second flange limiting edges (302) limiting the displacement of the housing flange; The second flange inlet (301) has a gradient guide edge; The length of the second flange inlet (301) is greater than the length of the first flange inlet (101), and the length of the second flange limiting edge (302) is less than the length of the first flange limiting edge (102); The first flange inlet (101) and the second flange inlet (301) form the inlet of the casing flange. After rotating the outer shell (3), the first flange limiting edge (102) and the second flange limiting edge (302) limit the casing flange.

3. The apparatus according to claim 2, characterized in that, The number of the first flange inlet (101), the first flange limiting edge (102), the second flange inlet (301), and the second flange limiting edge (302) is greater than or equal to the number of the top flange of the casing.

4. The apparatus according to any one of claims 1-3, characterized in that, The top of the outer casing (3) is provided with a top hole (303).

5. The apparatus according to claim 4, characterized in that, The screw (5) includes a screw head (501), a truncated cone (502), a lower retaining ring (503) and a threaded post (504) that are fixedly connected from top to bottom. The truncated cone (502) passes through the top hole (303) and has a screw hole (5021) that is compatible with the positioning screw (8). The lower retaining ring (503) is used to support the lower copper pad (6), and the upper and lower copper pads (6) are in close contact with the top of the outer shell (3); The threaded post (504) is threadedly connected to the inner ring (4).

6. The apparatus according to any one of claims 1-5, characterized in that, The inner ring (4) has mounting holes that are compatible with the side screws (2): When the screw (5) rotates, the lateral screw (2) prevents the inner ring (4) from rotating by cooperating with the limiting slide (10), thereby converting the rotational motion of the screw (5) into axial linear motion; After disassembly, the inner ring (4) is axially limited by the limiting groove (10) to prevent the inner ring (4) from separating from the outer shell (3).

7. The apparatus according to any one of claims 1-6, characterized in that, The copper pad (6) is a self-lubricating copper pad made of copper. With the self-lubricating properties of copper, the self-lubricating copper pad (6) achieves low-friction smooth transmission when the screw (5) and the inner ring (4) rotate relative to each other, thus replacing the bearing structure and providing buffer protection for the contact surface to avoid hard contact wear.

8. The apparatus according to any one of claims 1-7, characterized in that, The threaded connection between the screw (5) and the inner ring (4) adopts a fine thread.

9. The apparatus according to any one of claims 1-8, characterized in that, The number of positioning screws (8) is not less than 2.

10. The apparatus according to any one of claims 1-9, characterized in that, The bottom surface of the inner ring (4) presses against the turbine guide of the engine, driving the screw (5) to rotate. Under the anti-rotation action of the lateral screw (2), the screw (5) moves upward. The upward movement of the screw (5) drives the outer shell (3) to move. The outer shell (3) cooperates with the retaining ring (1) to pull the casing flange, thereby realizing the separation of the casing and the turbine guide. Four to eight weight-reducing circular holes are provided at the top of the inner ring (4) to reduce the weight of the inner ring (4) itself.

Images