An air duct mounting device and mounting method

Abstract

The application discloses an air duct mounting device and a mounting method, and belongs to the technical field of core unit assembly. The device comprises a main body driving assembly, a positioning and stopping assembly, a hook holding control assembly and an auxiliary operation assembly. The main body driving assembly comprises a rod, and a first handle is arranged on the upper portion of the rod. The hook holding control assembly comprises a hook claw arranged at the lower end of the rod and a hook rod penetrating the rod, a boss is arranged on the hook claw, the boss is used for being connected with a groove in the middle portion of the air duct during work, and the air duct is controlled to move up and down and rotate. One end of the hook rod is connected with the hook claw, a second cylindrical pin is arranged on the other end of the hook rod penetrating the rod, the second cylindrical pin is used for driving the hook rod to move up and down by control, and the boss of the hook claw is popped out or withdrawn. The positioning and stopping assembly comprises a stopping sleeve movably sleeved on the upper portion of the rod, and a second handle is arranged on the stopping sleeve. The stopping sleeve is matched with an end groove on the rear end face of the high-vortex first-stage disc rear shaft neck, so that stopping is realized during the tightening process.

Description

Technical Field

[0001] This invention belongs to the field of core machine assembly technology and relates to an air duct installation device and installation method. Background Technology

[0002] This is the first assembly of a certain model of core engine, which employs a two-stage high-pressure turbine structure. Air ducts are designed into the high-pressure rotor disk cavity, such as... Figure 1 As shown, due to the component's structural dimensions, the air duct cannot be installed from the front or rear ends of the core rotor. It can only be pre-placed at the bottom of the high-pressure rotor disc cavity, then lifted from the disc's center hole and installed from the middle, as shown. Figure 2 As shown, the air duct and the high-vortex rotor are connected by a threaded connection and a locking ring for stop, as follows: Figure 3 As shown, this part is in Figure 1 The position marked A in the middle makes the air duct assembly quite difficult. To date, there is no readily available air duct installation device to borrow, nor is there any relevant device structure for reference. Therefore, it is urgent to develop a device for installing the core machine air duct. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problem of air duct installation in a certain type of core machine in the prior art, and to provide an air duct installation device and installation method.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] In a first aspect, the present invention discloses an air duct installation device, comprising a main drive assembly, a positioning and stopping assembly, a hook holding control assembly, and an auxiliary operation assembly;

[0006] The main drive assembly includes a rod with a first handle at its upper part; the hook control assembly includes a pawl at the lower end of the rod and a hook rod passing through the rod, the pawl having a boss for connecting with the central groove of the air duct during operation to control the air duct's up-and-down movement and rotation; one end of the hook rod is connected to the pawl, and the other end of the hook rod extending from the rod has a second cylindrical pin for controlling the hook rod's up-and-down movement, causing the boss of the pawl to pop out or retract; the positioning and stopping assembly includes a stop sleeve movably fitted onto the upper part of the rod, with a second handle on the stop sleeve; the stop sleeve engages with the end groove on the rear end face of the high-speed vortex first-stage disc journal to achieve stopping during tightening; the auxiliary operation assembly includes an arc-shaped clamp located in the end groove on the rear end face of the high-speed vortex first-stage disc journal for securing the air duct's locking ring during operation; and a lifting device is provided at the upper end of the rod.

[0007] Further improvements are made in the following aspects:

[0008] The upper end of the rod is also provided with a lifting and balancing assembly; the lifting and balancing assembly includes a bushing connected to the upper end of the rod, the bushing is connected with an eye bolt, and the eye bolt is used to connect with the crane hook during lifting.

[0009] A spring balancer is installed between the eye bolt and the crane hook.

[0010] The stop sleeve is provided with a connecting hole. When the installation device is installed into or removed from the core machine, a pin is inserted into the connecting hole to fix the stop sleeve and the hook rod.

[0011] The bow-shaped clamp is fixed in the end groove of the rear end face of the high-speed vortex first-stage disc rear journal by an internal hexagonal head screw.

[0012] The hook is hinged to the rod via a first cylindrical pin.

[0013] A through hole is provided on the axis of the hook rod, and the diameter of the through hole is adapted to the outer diameter of the endoscope to facilitate observation of the position of the air duct falcon groove.

[0014] Two bow-shaped clamps are provided and are installed diagonally around the circumference of the journal of the high-speed vortex primary disk.

[0015] The outer wall of the protrusion of the hook is provided with a guide slope, which extends outward from the end of the protrusion to the root, so as to guide the protrusion of the hook into the middle of the falcon groove of the air duct.

[0016] Two first handles are provided, symmetrically inserted into rectangular slots on the outside of the rod; the first handles are clearance-fitted with the rectangular slots to enable quick assembly and disassembly of the first handles.

[0017] Secondly, the present invention discloses an air duct installation method based on the above-mentioned device, comprising:

[0018] Locking ring pre-fixing: hook the hook end of the bow-shaped clamp onto the locking ring of the air duct, and then fix the bow-shaped clamp diagonally on the rear end face of the high-volume first-stage disc rear journal to achieve pre-fixing of the locking ring;

[0019] Lifting and initial state adjustment of the device: Attach the lifting device of the device to the crane hook; fix the stop sleeve to the rod; move the second cylindrical pin to drive the hook rod to slide upward along the axial through hole inside the rod, causing the hook claw to rotate and retract the lower end boss, lock the position of the hook rod, and complete the initial state adjustment of the device.

[0020] Device insertion and positioning: Operate the crane to slowly move the device into the core machine until the stop sleeve is aligned with the end groove on the rear end face of the high-speed vortex first-stage disc rear journal; release the position lock of the stop sleeve and hook rod, move the second cylindrical pin to keep the hook rod in the upper position, and insert the lower end of the stop sleeve into the end groove on the rear end face of the high-speed vortex first-stage disc rear journal; slowly release the second cylindrical pin to move the hook rod down and push the hook claw to rotate until the lower end boss of the hook claw is engaged in the tenon groove in the middle of the air duct; operate the crane to slowly lift the device, moving the air duct upward until the upper thread of the air duct contacts the thread of the high-speed vortex rotor;

[0021] Air duct tightening assembly: Drive the second handle to fix the stop sleeve to prevent it from rotating circumferentially, and at the same time drive the first handle to rotate the rod clockwise. Through the cooperation between the hook claw boss and the air duct tenon groove, the air duct will rotate synchronously, so that the upper thread of the air duct gradually engages with the high vortex rotor thread and tightens until the air duct is assembled in place.

[0022] Device disassembly and finishing: Move the second cylindrical pin to move the hook rod upward, so that the hook claw boss disengages from the middle tenon groove of the air duct, and insert the pin to lock the hook rod position; push the stop sleeve upward to disengage it from the end groove of the rear end face of the journal of the high-speed vortex first stage disc, and lock the stop sleeve on the rod; operate the crane to slowly move the device out of the core machine; remove the bow clamp to complete the air duct installation.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] This invention discloses an air duct installation device. A first handle is mounted on the rod of the main drive assembly, and a second handle is mounted on the positioning and stopping assembly, providing convenient points of force application for the operator. This makes the entire device easier to hold and operate, significantly reducing operational difficulty. Even first-time users can quickly learn to use it, effectively improving installation efficiency. The hook control assembly features an ingenious design. A boss on the hook claw allows for precise connection with the tenon groove in the middle of the air duct, enabling precise control of the air duct's vertical movement and rotation. Simultaneously, by controlling the second cylindrical pin to drive the hook rod up and down, the hook claw boss pops out or retracts. This linkage control method makes the gripping and releasing actions of the air duct more precise and reliable, ensuring that the air duct accurately reaches the predetermined position during installation, improving installation accuracy. The positioning and stopping assembly's movable stop sleeve, fitted onto the upper part of the rod, engages with the end groove on the rear end face of the high-speed vortex primary drive disc's rear journal, providing reliable stopping during tightening. This design avoids installation deviations caused by device shaking or displacement during installation, ensuring installation stability and allowing the air duct to be securely installed in the designated position, thus improving installation quality. The bow-shaped clamp of the auxiliary operating component is located in the end groove on the rear end face of the journal of the high-speed turbine first-stage disk, which can firmly hook the locking ring of the air duct during operation. This design provides additional auxiliary support and fixation for the installation process, preventing the locking ring from accidentally loosening or shifting during installation, further ensuring the reliability of the air duct installation and reducing the risk of failure after installation. This device not only effectively solves the installation problem of core engine air ducts, but also can be used as a reference for the installation of air ducts of various types of aero engines and core engines if a similar structure is adopted. This fully demonstrates the versatility and adaptability of this device, enabling it to play a role in a wider range of fields and providing an efficient and reliable solution for air duct installation in aero engines and related industries.

[0025] This invention discloses an air duct installation method. In the pre-fixing step of the locking ring, the hook end of the bow-shaped clamp is hooked onto the locking ring of the air duct and fixed diagonally to the rear end face of the journal of the first-stage high-speed vortex machine. This diagonal fixing method enables the locking ring to obtain uniform and stable support force in the initial stage of installation, effectively preventing the locking ring from shaking or shifting during subsequent operations, laying a good foundation for the entire installation process, improving the initial stability of the installation, and reducing installation deviations and subsequent adjustment work caused by unstable initial fixing. In the device lifting and initial state adjustment step, the lifting device is attached to the crane hook, facilitating flexible movement and precise positioning of the device by the crane. At the same time, through a series of operations on the stop sleeve and hook rod, such as moving the stop sleeve, moving the second cylindrical pin to drive the hook rod to slide, causing the hook claw to rotate and retract the boss and lock the position, the device can be quickly adjusted to an initial state suitable for entering the core machine. This design makes the initial preparation operation of the device simple and easy, greatly shortening the preparation time before installation and improving the overall installation efficiency. In the installation and positioning steps, a crane is used to slowly move the device into the core machine until the stop sleeve aligns with the end groove on the rear end face of the high-speed vortex rotor's first-stage journal. By releasing the position lock between the stop sleeve and the hook rod, and cleverly utilizing the second cylindrical pin to control the state of the hook rod and hook claw, the stop sleeve is first engaged in the end groove for initial positioning. Then, the hook claw boss is engaged in the tenon groove in the middle of the air duct. Finally, the crane lifting device moves the air duct upwards until it makes threaded contact with the high-speed vortex rotor. This series of operations is interconnected, accurately positioning the device and air duct to the designated location, ensuring the accuracy of the installation position and avoiding installation failure or rework due to inaccurate positioning. This installation method, through the organic combination of the above steps, forms a complete, systematic, and efficient air duct installation process. From the initial pre-fixing of the locking ring to the final disassembly and finishing of the device, each step is closely linked and works in concert. This not only greatly shortens the installation time of the air duct and improves the installation efficiency, but also ensures the quality of the air duct installation through precise operation and reliable quality control, reducing the failure rate and rework rate during the installation process. This provides a strong guarantee for the normal operation of equipment such as aero engines and has significant economic and social benefits. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the air duct after installation in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the air duct structure before installation in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram showing the engagement position of the air duct and the turbine rotor in an embodiment of the present invention;

[0030] Figure 4 This is a cross-sectional view of an air duct installation device according to an embodiment of the present invention;

[0031] Figure 5 This is a side view of an air duct installation device according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of a rod in an air duct installation device according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the hook rod in an air duct installation device according to an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the structure of the falcon groove in the middle of the air duct and the end groove on the rear end face of the journal of the high-vortex first stage disk in an embodiment of the present invention.

[0035] Wherein: 101-High-pressure vortex rotor; 102-High-pressure vortex casing; 103-Main combustion and first guide; 104-High-pressure rotor stator; 105-High-pressure vortex first stage disc rear journal; 1050-High-pressure vortex first stage disc rear journal end groove; 106-Air duct; 1060-Air duct tenon groove; 107-High-pressure vortex first stage disc; 108-Locking ring; 1-Rod; 2-Claw; 3-Hook rod; 4-Stop sleeve; 5-First handle; 6-Arch-shaped clamp; 7-Bushing; 8-Pin; 9-First cylindrical pin; 10-Second handle; 11-Eye contact screw; 12-Hex socket head cap screw; 13-Second cylindrical pin; 14-Spring balancer; 15-Marking point. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0042] The present invention will now be described in further detail with reference to the accompanying drawings:

[0043] See Figure 4 This invention discloses an air duct installation device, including a main drive assembly, a positioning and stopping assembly, a hook holding control assembly, and an auxiliary operation assembly;

[0044] The main drive assembly includes a rod 1, the structure of which is as follows: Figure 5As shown; the upper part of the rod 1 is provided with a first handle 5; the hook holding control assembly includes a hook 2 provided at the lower end of the rod 1 and a hook rod 3 passing through the rod 1. The hook 2 is provided with a boss, which is used to connect with the air duct tenon groove 1060 during operation to control the up and down movement and rotation of the air duct; one end of the hook rod 3 is connected to the hook 2, and the other end of the hook rod 3 that passes through the rod 1 is provided with a second cylindrical pin 13, which is used to drive the hook rod 3 to move up and down by controlling the second cylindrical pin 13, thereby causing the boss of the hook 2 to pop out or retract; the positioning and stopping assembly includes a stop sleeve 4 movably sleeved on the upper part of the rod 1. The stop sleeve 4 is provided with a second handle 10; the stop sleeve 4 is provided with a connecting hole. When the installation device is installed or removed from the core machine, a pin 8 is inserted into the connecting hole to fix the stop sleeve 4 and the hook rod 3. The stop sleeve 4 engages with the end groove on the rear end face of the high-speed vortex first-stage disc rear journal to achieve stopping during tightening. The auxiliary operating component includes an arc-shaped clamp 6 disposed in the end groove on the rear end face of the high-speed vortex first-stage disc rear journal, used to hold the locking ring of the air duct during operation. The arc-shaped clamp 6 is fixed in the end groove on the rear end face of the high-speed vortex first-stage disc rear journal by a hexagonal head screw 6. Two arc-shaped clamps 6 are provided, installed diagonally along the circumference of the high-speed vortex first-stage disc rear journal. A lifting device is provided at the upper end of the rod 1. The hook 2 is hinged to the rod 1 by a first cylindrical pin 9. A through hole is provided on the axis of the hook rod 3, the diameter of which is adapted to the outer diameter of the endoscope to facilitate observation of the position of the air duct tenon groove. The outer wall of the boss of the hook 2 is provided with a guide slope, which gradually extends outward from the end of the boss to the root, so as to guide the boss of the hook 2 when it enters the middle tenon groove of the air duct. Two first handles 5 are provided, symmetrically inserted into rectangular slots outside the rod 1; the first handles 5 are clearance-fitted with the rectangular slots to enable quick assembly and disassembly of the first handles 5.

[0045] The upper end of the rod 1 is also provided with a lifting balance assembly; the lifting balance assembly includes a bushing 7 connected to the upper end of the rod 1, and the bushing 7 is connected with an eye bolt 11, which is used to connect with the crane hook during lifting. A spring balancer 14 is provided between the eye bolt (11) and the crane hook.

[0046] This invention discloses an air duct installation device. A first handle is mounted on the rod of the main drive assembly, and a second handle is mounted on the positioning and stopping assembly, providing convenient points of force application for the operator. This makes the entire device easier to hold and operate, significantly reducing operational difficulty. Even first-time users can quickly learn to use it, effectively improving installation efficiency. The hook control assembly features an ingenious design. A boss on the hook claw allows for precise connection with the tenon groove in the middle of the air duct, enabling precise control of the air duct's vertical movement and rotation. Simultaneously, by controlling the second cylindrical pin to drive the hook rod up and down, the hook claw boss pops out or retracts. This linkage control method makes the gripping and releasing actions of the air duct more precise and reliable, ensuring that the air duct accurately reaches the predetermined position during installation, improving installation accuracy. The positioning and stopping assembly's movable stop sleeve, fitted onto the upper part of the rod, engages with the end groove on the rear end face of the high-speed vortex primary drive disc's rear journal, providing reliable stopping during tightening. This design avoids installation deviations caused by device shaking or displacement during installation, ensuring installation stability and allowing the air duct to be securely installed in the designated position, thus improving installation quality. The bow-shaped clamp of the auxiliary operating component is located in the end groove on the rear end face of the journal of the high-speed turbine first-stage disk, which can firmly hook the locking ring of the air duct during operation. This design provides additional auxiliary support and fixation for the installation process, preventing the locking ring from accidentally loosening or shifting during installation, further ensuring the reliability of the air duct installation and reducing the risk of failure after installation. This device not only effectively solves the installation problem of core engine air ducts, but also can be used as a reference for the installation of air ducts of various types of aero engines and core engines if a similar structure is adopted. This fully demonstrates the versatility and adaptability of this device, enabling it to play a role in a wider range of fields and providing an efficient and reliable solution for air duct installation in aero engines and related industries.

[0047] This invention also discloses an air duct installation method based on the above-described device, comprising:

[0048] Locking ring pre-fixing: hook the hook end of the bow-shaped clamp 6 onto the locking ring of the air duct, and then fix the bow-shaped clamp 6 diagonally on the rear end face of the high-turbo first stage disc rear journal to achieve pre-fixing of the locking ring;

[0049] Lifting and initial state adjustment of the device: Attach the lifting device of the device to the crane hook; fix the stop sleeve 4 to the rod 1; move the second cylindrical pin 13 to drive the hook rod 3 to slide upward along the axial through hole inside the rod 1, causing the hook claw 2 to rotate and retract the lower end boss, lock the position of the hook rod 3, and complete the initial state adjustment of the device.

[0050] Device insertion and positioning: Operate the crane to slowly move the device into the core machine until the stop sleeve 4 is aligned with the end groove on the rear end face of the high-speed vortex first-stage disc rear journal; release the position lock of the stop sleeve 4 and hook rod 3, move the second cylindrical pin 13 to keep the hook rod 3 in the upper position, and insert the lower end of the stop sleeve 4 into the end groove on the rear end face of the high-speed vortex first-stage disc rear journal; slowly release the second cylindrical pin 13 to move the hook rod 3 down, push the hook pawl 2 to rotate until the lower end boss of the hook pawl 2 is engaged in the tenon groove in the middle of the air duct; operate the crane to slowly lift the device, moving the air duct upward until the upper thread of the air duct contacts the thread of the high-speed vortex rotor;

[0051] Air duct tightening assembly: Drive the second handle 10 to fix the stop sleeve 4 to prevent it from rotating circumferentially, and at the same time drive the first handle 5 to rotate the rod 1 clockwise. Through the cooperation between the hook 2 boss and the air duct tenon groove, the air duct is driven to rotate synchronously, so that the upper thread of the air duct gradually engages with the high vortex rotor thread and tightens until the air duct is assembled in place.

[0052] Device disassembly and finishing: Move the second cylindrical pin 13 to move the hook rod 3 upward, so that the hook claw 2 boss disengages from the middle tenon groove of the air duct, and insert the pin 8 to lock the position of the hook rod 3; push the stop sleeve 4 upward to disengage it from the end groove of the rear end face of the journal of the high-speed vortex first stage disc, and lock the stop sleeve 4 on the rod 1; operate the crane to slowly move the device out of the core machine; remove the bow-shaped clamp 6 to complete the air duct installation.

[0053] This invention discloses an air duct installation method. In the pre-fixing step of the locking ring, the hook end of the bow-shaped clamp is hooked onto the locking ring of the air duct and fixed diagonally to the rear end face of the journal of the first-stage high-speed vortex machine. This diagonal fixing method enables the locking ring to obtain uniform and stable support force in the initial stage of installation, effectively preventing the locking ring from shaking or shifting during subsequent operations, laying a good foundation for the entire installation process, improving the initial stability of the installation, and reducing installation deviations and subsequent adjustment work caused by unstable initial fixing. In the device lifting and initial state adjustment step, the lifting device is attached to the crane hook, facilitating flexible movement and precise positioning of the device by the crane. At the same time, through a series of operations on the stop sleeve and hook rod, such as moving the stop sleeve, moving the second cylindrical pin to drive the hook rod to slide, causing the hook claw to rotate and retract the boss and lock the position, the device can be quickly adjusted to an initial state suitable for entering the core machine. This design makes the initial preparation operation of the device simple and easy, greatly shortening the preparation time before installation and improving the overall installation efficiency. In the installation and positioning steps, a crane is used to slowly move the device into the core machine until the stop sleeve aligns with the end groove on the rear end face of the high-speed vortex rotor's first-stage journal. By releasing the position lock between the stop sleeve and the hook rod, and cleverly utilizing the second cylindrical pin to control the state of the hook rod and hook claw, the stop sleeve is first engaged in the end groove for initial positioning. Then, the hook claw boss is engaged in the tenon groove in the middle of the air duct. Finally, the crane lifting device moves the air duct upwards until it makes threaded contact with the high-speed vortex rotor. This series of operations is interconnected, accurately positioning the device and air duct to the designated location, ensuring the accuracy of the installation position and avoiding installation failure or rework due to inaccurate positioning. This installation method, through the organic combination of the above steps, forms a complete, systematic, and efficient air duct installation process. From the initial pre-fixing of the locking ring to the final disassembly and finishing of the device, each step is closely linked and works in concert. This not only greatly shortens the installation time of the air duct and improves the installation efficiency, but also ensures the quality of the air duct installation through precise operation and reliable quality control, reducing the failure rate and rework rate during the installation process. This provides a strong guarantee for the normal operation of equipment such as aero engines and has significant economic and social benefits.

[0054] The working process of this invention is as follows:

[0055] Locking ring pre-fixing: Take two bow-shaped clips 6, hook the hook end of each bow-shaped clip 6 onto the locking ring of the air duct, and then use two internal hexagonal head screws 12 to pass through the reserved holes of the end slots on the rear end face of the high-speed vortex first-stage disc rear journal, and engage with the threaded holes of the corresponding bow-shaped clips 6 to tighten them, so that the two bow-shaped clips 6 are fixed in a diagonal state, thereby achieving the pre-fixing of the locking ring on the rear end face of the high-speed vortex first-stage disc rear journal.

[0056] Lifting and initial state adjustment of the device: Attach the upper hook of the spring balancer 14 to the crane hook, and then attach the lifting eye screw 11 of the device to the lower hook of the spring balancer 14; insert the pin 8 into the positioning hole corresponding to the stop sleeve 4 and the rod 1 to fix the stop sleeve 4 on the rod 1; move the cylindrical pin 13 to drive the hook rod 3 to slide upward along the axial through hole inside the rod 1, causing the hook claw 2 to rotate around the cylindrical pin 9 and retract the lower boss; insert the pin 8 into the positioning hole corresponding to the hook rod 3 and the rod 1 to lock the position of the hook rod 3, thus completing the initial state adjustment of the device.

[0057] Device insertion and positioning: Operate the crane to slowly move the device into the core machine until the stop sleeve 4 is aligned with the end groove on the rear end face of the high-speed vortex first-stage disc rear journal; pull out the pin 8 that fixes the stop sleeve 4 and the hook rod 3, move the cylindrical pin 13 to keep the hook rod 3 in the upper position, and insert the lower end of the stop sleeve 4 into the end groove on the rear end face of the high-speed vortex first-stage disc rear journal; insert the endoscope through the through hole in the middle of the hook rod 3 to observe and locate the position of the tenon groove in the middle of the air duct, slowly release the cylindrical pin 13 to move the hook rod 3 down, push the hook pawl 2 to rotate around the cylindrical pin 9 until the lower end boss of the hook pawl 2 is engaged in the tenon groove in the middle of the air duct; operate the crane to fine-tune the length of the spring balancer 14, slowly lift the device, and move the air duct upward until the upper thread of the air duct contacts the thread of the high-speed vortex rotor.

[0058] Air duct tightening assembly: Insert the two handles 5 into the rectangular slots symmetrically opened in the middle of the rod 1, and insert the two handles 10 into the slots symmetrically opened on the side wall of the stop sleeve 4; the operator holds the handles 10 with both hands to fix the stop sleeve 4 and prevent it from rotating circumferentially, while holding the handles 5 with both hands to rotate the rod 1 clockwise. Through the cooperation between the hook 2 boss and the air duct tenon groove, the air duct is driven to rotate synchronously, so that the upper thread of the air duct gradually engages with the high vortex rotor thread and tightens until the air duct is assembled in place (the threads are fully engaged and the axial position of the air duct meets the design requirements).

[0059] Device disassembly and finishing: Pull out and remove handle 5 and handle 10 in sequence; move the cylindrical pin 13 to move the hook rod 3 upward, so that the hook claw 2 protrusion disengages from the middle tenon groove of the air duct, and insert the pin 8 to lock the position of the hook rod 3; push the stop sleeve 4 upward to disengage it from the end groove of the rear end face of the journal of the high-speed vortex first stage disc, and insert the pin 8 to fix the stop sleeve 4 on the rod 1; operate the crane to slowly move the device out of the core machine; unscrew the hex socket head cap screw 12, remove the bow clip 6, and complete the entire process of air duct installation.

[0060] The working principle of this invention is as follows:

[0061] During use, first use the bow-shaped clip 6 to hook the locking ring 108, and then use the internal hex head screw 12 to fix the bow-shaped clip 6. Both bow-shaped clips 6 are installed diagonally.

[0062] Hang the spring balancer 14 on the crane hook, then hang the lifting eye screw of the device on the spring balancer 14, fix the stop sleeve 4 on the rod 1 with the pin 8, pull the second cylindrical pin 13 to lift the hook rod 3, so that the boss is retracted, insert another pin 8 into the hole of the hook rod 3, loosen the second cylindrical pin 13 and install the whole device into the core machine.

[0063] Tighten the second cylindrical pin 13, pull out the pin 8, and place the stop sleeve 4 onto the end groove 1050 of the high-speed vortex first-stage disc rear journal. Use an endoscope to locate the position of the tenon groove in the middle of the air duct, and slowly loosen the second cylindrical pin 13 so that the boss on the hook 2 enters the air duct groove 106. Slowly lift the air duct 106 until the upper thread of the air duct 106 contacts the thread of the high-speed vortex rotor. The positions of the end groove on the rear face of the high-speed vortex first-stage disc rear journal and the tenon groove in the middle of the air duct are as follows: Figure 7 As shown;

[0064] Install the handles of rod 1 and stop sleeve 4, hold the handle on stop sleeve 4, turn the handle of rod 1, and install the air duct 106 into place.

[0065] Remove the first handle 5 and the second handle 10, tighten the second cylindrical pin 13 to lift the hook rod 3, so that the boss on the hook claw 2 retracts out of the middle groove of the air duct, insert the pin 8 into the hole of the hook rod 3, move the stop sleeve 4 up, and fix it to the rod 1 with the pin 8, remove the core machine of the device, and remove the bow-shaped clamp 6 and the internal hexagon head screw 12.

[0066] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An air duct installation device, characterized in that, It includes the main drive assembly, positioning and stopping assembly, hook holding control assembly, and auxiliary operation assembly; The main drive assembly includes a rod (1), with a first handle (5) on the upper part of the rod (1); the hook control assembly includes a pawl (2) at the lower end of the rod (1) and a hook rod (3) passing through the rod (1). The pawl (2) has a boss for connecting with the falcon groove in the middle of the air duct during operation to control the up-and-down movement and rotation of the air duct; one end of the hook rod (3) is connected to the pawl (2), and the other end of the hook rod (3) passing through the rod (1) is provided with a second cylindrical pin (13) for controlling the second cylindrical pin (13). The drive hook rod (3) moves up and down, causing the protrusion of the hook claw (2) to pop out or retract; the positioning and stopping assembly includes a stop sleeve (4) movably sleeved on the upper part of the rod (1), and a second handle (10) is provided on the stop sleeve (4); the stop sleeve (4) cooperates with the end groove of the rear end face of the high-speed vortex first-stage disc rear journal to achieve stopping during tightening; the auxiliary operation assembly includes an arc-shaped clamp (6) provided in the end groove of the rear end face of the high-speed vortex first-stage disc rear journal, used to hook the locking ring of the air duct during operation; a lifting device is provided at the upper end of the rod (1).

2. The air duct installation device according to claim 1, characterized in that, The upper end of the rod (1) is also provided with a lifting balance assembly; the lifting balance assembly includes a bushing (7) connected to the upper end of the rod (1), the bushing (7) is connected with a lifting eye screw (11), the lifting eye screw (11) is used to connect with the crane hook during lifting.

3. The air duct installation device according to claim 2, characterized in that, A spring balancer (14) is provided between the eye bolt (11) and the crane hook.

4. The air duct installation device according to claim 1, characterized in that, The stop sleeve (4) is provided with a connecting hole. When the installation device is installed into or removed from the core machine, a pin (8) is inserted into the connecting hole to fix the stop sleeve (4) and the hook rod (3).

5. The air duct installation device according to claim 1, characterized in that, The bow-shaped clamp (6) is fixed in the end groove of the rear end face of the high-speed vortex first-stage disc journal by an internal hexagonal head screw.

6. The air duct installation device according to claim 1, characterized in that, The hook (2) is hinged to the rod (1) via a first cylindrical pin (9).

7. The air duct installation device according to claim 1, characterized in that, A through hole is provided on the axis of the hook rod (3), and the diameter of the through hole is adapted to the outer diameter of the endoscope to facilitate observation of the position of the air duct falcon groove; two bow-shaped clamps (6) are provided and are installed diagonally along the circumference of the journal of the high-vortex first stage disk.

8. The air duct installation device according to claim 1, characterized in that, The outer wall of the protrusion of the hook (2) is provided with a guide slope. The guide slope extends outward from the end of the protrusion to the root so as to guide the protrusion of the hook (2) when it enters the middle falcon groove of the air duct.

9. The air duct installation device according to claim 1, characterized in that, Two first handles (5) are provided, which are symmetrically inserted into rectangular slots outside the rod (1); the first handles (5) are fitted with the rectangular slots with a clearance, which is used to realize the quick assembly and disassembly of the first handles (5).

10. A method for installing an air duct based on the device according to any one of claims 1-9, characterized in that, include: Locking ring pre-fixing: hook the hook end of the bow-shaped clamp (6) onto the locking ring of the air duct, and then fix the bow-shaped clamp (6) diagonally on the rear end face of the high-vortex first-stage disc rear journal to achieve the pre-fixing of the locking ring; Lifting and initial state adjustment of the device: Attach the lifting device of the device to the crane hook; fix the stop sleeve (4) on the rod (1); move the second cylindrical pin (13) to drive the hook rod (3) to slide upward along the axial through hole inside the rod (1), so that the hook claw (2) rotates and retracts the lower end boss, lock the position of the hook rod (3), and complete the initial state adjustment of the device; Device insertion and stop positioning: Operate the crane to slowly move the device into the core machine until the stop sleeve (4) is aligned with the end groove on the rear end face of the high-speed vortex first stage disc rear journal; release the position lock of the stop sleeve (4) and hook rod (3), move the second cylindrical pin (13) to keep the hook rod (3) in the upper position, and insert the lower end of the stop sleeve (4) into the end groove on the rear end face of the high-speed vortex first stage disc rear journal; slowly release the second cylindrical pin (13) to move the hook rod (3) down, push the hook claw (2) to rotate until the lower end boss of the hook claw (2) is inserted into the middle tenon groove of the air duct; operate the crane to slowly lift the device, drive the air duct to move up until the upper thread of the air duct contacts the thread of the high-speed vortex rotor; Air duct tightening assembly: Drive the second handle (10) to fix the stop sleeve (4) to prevent it from rotating circumferentially, and at the same time drive the first handle (5) to rotate the rod (1) clockwise. Through the cooperation between the hook (2) boss and the air duct ferrule groove, the air duct will rotate synchronously, so that the upper thread of the air duct gradually meshes with the high vortex rotor thread and tightens until the air duct is assembled in place. Device disassembly and finishing: Move the second cylindrical pin (13) to move the hook rod (3) upward, so that the hook claw (2) boss disengages from the middle of the air duct's tenon groove, insert the pin (8) to lock the hook rod (3) in position; push the stop sleeve (4) upward to disengage it from the end groove on the rear end face of the high-speed vortex first-stage disc rear journal, and lock the stop sleeve (4) on the rod (1); operate the crane to slowly move the device out of the core machine; remove the bow clamp (6) to complete the air duct installation.

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