A method of assembling a rotor component

Abstract

The application provides a rotor component assembling method, comprising the following steps: S1, installing a protection tool on a first end of a main shaft and completing vertical placement of the main shaft; S2, sequentially installing an impeller, a spacer sleeve and a balance disc on the main shaft according to drawing requirements, and after the installation is completed, horizontally placing the main shaft and detecting low-speed dynamic balance of the main shaft; S3, sequentially installing a moving vane assembly on the main shaft according to drawing requirements and trimming the moving vane assembly; the application can realize sequential installation of the impeller, the spacer sleeve, the balance disc and the moving vane assembly on the main shaft, realize assembly of the rotor, improve installation efficiency and installation quality through cooperation of the protection tool, a protection cover, a disc rotor tool and a bending tool, realize control of the assembly process, and guarantee assembly precision and assembly quality.

Description

Technical Field

[0001] This application belongs to the field of compressor technology, specifically relating to a rotor component assembly method. Background Technology

[0002] The rotor of an axial-centrifugal compressor, as the core component of an axial compressor, plays a crucial role. The axial-centrifugal rotor mainly consists of blades, impellers, and a shaft. It is a high-speed rotating component that drives gas flow through the rotation of the blades and impeller, achieving gas compression or transportation.

[0003] The working principle of an axial-flow centrifugal rotor is that gas enters the rotor from the intake end, and is continuously compressed and accelerated under the action of impellers and blades, eventually outputting high-pressure gas at the exhaust end. Its working process includes three stages: intake, compression, and exhaust. As the rotor rotates, gas enters from the intake end, is gradually accelerated by the action of impellers and blades, forms flow within the flow channel between the impellers, and flows backward towards the outlet. After entering the compression section, the gas is infinitely compressed by the blades, and its pressure and temperature continuously increase. When the gas is fully compressed and reaches the exhaust section, the gas pressure has reached the design requirements. In the exhaust section, the gas passes through the energy-releasing blades, converting energy into pressure, accelerating the gas through the exhaust port, and exiting the compressor.

[0004] The axial centrifugal rotor is one of the key components of an axial compressor or axial fan, and its performance directly affects the operating efficiency and stability of the entire equipment. Therefore, the assembly of the axial centrifugal rotor is crucial for the normal operation of the compressor. The assembly process must ensure rotor assembly accuracy to avoid friction during unit operation and abnormal vibration caused by the rotor, which could lead to unit shutdown. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0006] To address the aforementioned problems, this application provides a rotor component assembly method, comprising the following steps:

[0007] S1. Install protective fixtures on the first end of the spindle and complete the vertical placement of the spindle;

[0008] S2. Install the impeller, spacer and balance disc onto the main shaft in sequence according to the drawing requirements. After installation, place the main shaft horizontally and perform a low-speed dynamic balance test.

[0009] S3. Install the moving blade assembly onto the main shaft in sequence according to the drawing requirements and trim the moving blade assembly;

[0010] S4. Perform low-speed and high-speed dynamic balancing measurements on the main shaft. After the measurements meet the requirements, install the coupling.

[0011] Optionally, step S1 includes the following steps:

[0012] S11. Install the protective fixture on the first end of the spindle, and lift the spindle upright and place it on the support plate. Before installation, check the support plate to ensure that the levelness is ≤0.10mm / m.

[0013] S12. Install a locking pad on the support pad and lock the spindle to the locking pad, and measure the levelness to ensure that the levelness is ≤0.10mm / m.

[0014] Optionally, the protective tooling includes:

[0015] A protective cover, wherein an installation groove matching the first end of the spindle is provided inside the protective cover;

[0016] The first connector is connected to the protective cover and the first end of the main shaft.

[0017] Optionally, in step S2, when installing the balance disc, a lifting ring needs to be installed on the balance disc to lift and install the balance disc onto the main shaft. Then, the main shaft is placed horizontally using the lifting ring. During this process, a protective cover needs to be installed on the thrust plate of the main shaft.

[0018] Optionally, the protective cover includes a protective sleeve and a second connector, wherein the protective sleeve has a semi-circular structure and the second connector is disposed between the protective sleeves.

[0019] Optionally, before step S3, the spindle needs to be placed on a disc rotor fixture, which includes:

[0020] A support bracket for supporting the spindle;

[0021] A roller is disposed between the bracket and the main shaft.

[0022] Optionally, the moving blade assembly includes a first-stage moving blade, a second-stage moving blade, a third-stage moving blade, a fourth-stage moving blade, a fifth-stage moving blade, and a sixth-stage moving blade, and the main shaft is provided with a first-stage moving blade mounting slot, a second-stage moving blade mounting slot, a third-stage moving blade mounting slot, a fourth-stage moving blade mounting slot, a fifth-stage moving blade mounting slot, and a sixth-stage moving blade mounting slot.

[0023] Optionally, in step S3, the moving blade assembly is installed on the main shaft sequentially according to the drawing requirements, specifically including the following steps:

[0024] S31. The first-stage moving blade, the second-stage moving blade, and the third-stage moving blade are trial-installed on the main shaft;

[0025] S32. The fourth-stage moving blade, the fifth-stage moving blade, and the sixth-stage moving blade are trial-installed on the main shaft;

[0026] S33. The first-stage moving blade, the second-stage moving blade, and the third-stage moving blade are mounted on the main shaft;

[0027] S34. The fourth-stage moving blade, the fifth-stage moving blade, and the sixth-stage moving blade are installed on the main shaft;

[0028] S35. Grind and fix the first-stage moving blade, second-stage moving blade, third-stage moving blade, fourth-stage moving blade, fifth-stage moving blade, and sixth-stage moving blade after installation.

[0029] Optionally, in step S33, a fixing plate is installed between the first-stage moving blade, the second-stage moving blade, the third-stage moving blade and the main shaft, and the fixing plate is installed by a bending tool.

[0030] Optionally, the bending fixture includes:

[0031] V-shaped plate, the V-shaped plate being disposed on the main shaft;

[0032] A drive board is disposed on the V-shaped plate, with one end of it located below the fixing piece;

[0033] A pressure plate is disposed on the drive plate and located above the fixing plate.

[0034] Beneficial effects

[0035] The rotor assembly method provided in the embodiments of the present invention enables the impeller, spacer, balance disc and moving blade assembly to be installed onto the main shaft in sequence to achieve rotor assembly. Moreover, the installation efficiency and quality are improved by the cooperation of protective fixtures, protective covers, disc rotor fixtures and bending fixtures, and the assembly process is controlled to ensure assembly accuracy and quality. Attached Figure Description

[0036] Figure 1 This is a flowchart of the application;

[0037] Figure 2 This is a structural diagram of the assembled spindle of this application;

[0038] Figure 3 This is a structural diagram showing the main shaft of this application being hoisted onto the support plate and the locking plate;

[0039] Figure 4 This is a structural diagram of the protective tooling used in this application;

[0040] Figure 5 This is a structural diagram of the balance disc in this application;

[0041] Figure 6 This is a diagram showing the installation structure of the protective cover in this application;

[0042] Figure 7 This is a diagram showing the spindle support structure of the disc rotor tooling in this application;

[0043] Figure 8 This is the main structural view of the bending tooling in this application;

[0044] Figure 9 This is a side view of the bending fixture in this application.

[0045] The reference numerals in the attached figures are as follows:

[0046] 1. Main shaft; 2. Protective fixture; 3. Impeller; 4. Spacer; 5. Balance disc; 6. Moving blade assembly; 7. Support pad; 8. Locking pad; 9. Protective cover; 10. First connecting piece; 11. Thrust disc; 12. Protective cover; 13. Protective sleeve; 14. Second connecting piece; 15. Disc rotor fixture; 16. Bracket; 17. Roller; 18. First stage moving blade; 19. Second stage moving blade; 20. Third stage moving blade; 21. Fourth stage moving blade; 22. Fifth stage moving blade; 23. Sixth stage moving blade; 24. Bending fixture; 25. Fixing plate; 26. V-shaped plate; 27. Drive plate; 28. Pressure plate. Detailed Implementation

[0047] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 this invention according to the specific circumstances.

[0050] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0051] See also Figure 1-9 As shown, an embodiment of this application provides a rotor component assembly method, including the following steps:

[0052] S1. Install the protective fixture 2 on the first end of the spindle 1 and complete the vertical placement of the spindle 1;

[0053] S2. Install the impeller 3, spacer 4 and balance disc 5 onto the main shaft 1 in sequence according to the drawing requirements. After installation, place the main shaft 1 horizontally and perform a low-speed dynamic balance test on it.

[0054] S3. Install the moving blade assembly 6 onto the main shaft 1 in sequence according to the drawing requirements and trim the moving blade assembly 6.

[0055] S4. Perform low-speed and high-speed dynamic balancing measurements on the main shaft 1. After the measurements meet the requirements, install the coupling.

[0056] Specifically, the assembled structure of spindle 1 includes: spindle 1, impeller 3, spacer 4, balance disc 5, moving blade assembly 6, thrust disc 11, first-stage moving blade 18, second-stage moving blade 19, third-stage moving blade 20, fourth-stage moving blade 21, fifth-stage moving blade 22, and sixth-stage moving blade 23. Before assembly, clean the surfaces of spindle 1 and all components, and smooth the edges of the parts to be assembled, removing burrs and sharp points. Heat the hot-fitting parts and measure them to ensure that the error between the hot-fitting parts and spindle 1 is within a reasonable range. To prevent deformation or surface oxidation during hot fitting, all parts must be heated uniformly, with a heating temperature not exceeding 350-400℃ and a holding time of not less than 2 hours. Before hot fitting, measure the actual fit clearance. If the measured inner hole dimension of the workpiece before hot fitting is ≥0.30mm larger than the actual dimension of spindle 1, assembly is possible.

[0057] A screw hole is provided on the first end of the spindle 1, and the protective fixture 2 is installed on the first end of the spindle 1 to protect the spindle 1 during hoisting. A thread is provided on the spindle 1, and the hoisted workpiece is threadedly connected to the spindle 1 to adjust it from a horizontal state to a vertical state, providing a foundation for subsequent installation.

[0058] The impeller 3 is hoisted and vertically mounted onto the main shaft 1. After the main shaft 1 cools to room temperature, a hoisting tool is installed on the spacer 4 and it is then vertically mounted onto the main shaft 1. After the spacer 4 cools to room temperature, a lifting ring is installed on the side of the balance disc 5 and it is then vertically mounted onto the main shaft 1. After installation, the main shaft 1 is hoisted from a vertical position to a horizontal position. The surface of the main shaft 1 is cleaned, and fixing pins and screws are installed between the balance disc 5 and the main shaft 1. After installation, the protruding parts of the screws are cut off, smoothed, and fixed with three-point punching. The main shaft 1, impeller 3, spacer 4, and balance disc 5 are measured using dial indicators. According to the drawing requirements, the main shaft 1, impeller 3, spacer 4, and balance disc 5 are machined with increased allowable dimensions to meet the drawing dimensions, with smooth transitions at the arcs. The main shaft 1 is then subjected to low-speed dynamic balancing testing, and the vibration requirements for maximum continuous, trip, and first-order speeds meet API 617.

[0059] After passing the inspection, the moving blade assembly 6 is installed onto the main shaft 1 in sequence according to the drawing requirements, and the installed moving blade assembly 6 is then trimmed to meet the drawing requirements.

[0060] After the moving blade assembly 6 is installed, the main shaft 1 is subjected to low-speed and high-speed dynamic balancing measurements. After the measurements meet the standards, the inner hole of the coupling and the connecting surface of the main shaft 1 are cleaned. The half coupling and flexible assembly are installed, and locking pins and shims are installed to ensure that the clearance between the flexible assembly and the half coupling is consistent. The assembly zero point of the half coupling is confirmed. The rubber ring is installed, and the rotor half coupling is installed hydraulically. After the half coupling is assembled in place, the high-pressure pump is slowly depressurized, and the low-pressure pump maintains pressure for no less than 60 minutes to successfully complete the assembly of the main shaft 1 and ensure the assembly accuracy and quality of the main shaft 1.

[0061] Step S1 includes the following steps:

[0062] S11. Install the protective fixture 2 on the first end of the main shaft 1, and lift the main shaft 1 upright and place it on the support pad 7. Before installation, check the support pad 7 to ensure that the levelness is ≤0.10mm / m.

[0063] S12. Install the locking pad 8 on the support pad 7 and lock the main shaft 1 on the locking pad 8, and measure the levelness to ensure that the levelness is ≤0.10mm / m.

[0064] Specifically, before assembling the spindle 1, the assembly site needs to be cleaned. An assembly slot is provided on the ground of the assembly site. The support plate 7 is hoisted onto the assembly site, and its relative position to the assembly slot is adjusted. The support plate 7 is then installed above the assembly slot. Assembly holes are provided on the support plate 7 at the matching positions with the assembly slot. The levelness of the support plate 7 is measured using a level to ensure it is ≤0.10mm / m. After the protective fixture 2 is installed on the first end of the spindle 1, it is lifted using hoisting tools. The main shaft 1 is hoisted and placed on the support plate 7. At this time, the first end of the main shaft 1 is located in the assembly groove, which realizes the horizontal adjustment of the main shaft 1 to the vertical state. During the hoisting process, it should be operated slowly. When lowering the first end of the main shaft 1, when the distance between the first end of the main shaft 1 and the support plate 7 is 50mm, it should be lowered slowly until the main shaft 1 contacts the support plate 7 to reduce the risk of the main shaft 1 being damaged by collision. At this time, the support plate 7 is engaged with the first stage moving blade 18 of the main shaft 1 below the installation position to fix the main shaft 1.

[0065] Install a locking pad 8 above the support pad 7. Place eight fixing blocks evenly around the circumference of the locking pad 8 and make them contact the fifth-stage moving blade mounting groove of the main shaft 1 to fix the main shaft 1. After installation, place a level on the end face of the thrust plate 11 to ensure that the levelness is ≤0.10mm / m before proceeding with subsequent installation work.

[0066] The protective fixture 2 includes:

[0067] The protective cover 9 has an internal mounting groove that matches the first end of the main shaft 1.

[0068] The first connector 10 is connected to the protective cover 9 and the first end of the main shaft 1.

[0069] In this technical solution, the protective fixture 2 is used to protect the first end of the spindle 1. It has an installation groove that matches the first end of the spindle 1 and a threaded hole on the first end of the spindle 1. When in use, the protective cover 9 can be installed on the first end of the spindle 1, and then the protective cover 9 can be fixedly installed on the first end of the spindle 1 through the first connector 10. This avoids damage to the spindle 1 during hoisting or assembly and improves the quality of the spindle 1 after assembly.

[0070] In step S2, when installing the balance disc 55, a lifting ring needs to be installed on the balance disc 55. The balance disc 55 is then hoisted onto the main shaft 11 and installed using the lifting ring. The main shaft 11 is then placed horizontally using the lifting ring. During this process, a protective cover 1212 needs to be installed on the thrust disc 1111 of the main shaft 11.

[0071] In this technical solution, after the locking pad 8 fixes the main shaft 1, the impeller 3, spacer 4 and balance disc 5 can be hoisted and installed on the main shaft 1 in sequence. During the hoisting and installation process, it is necessary to follow the drawings and the hot installation process rules of the blower rotor group to ensure that the installation position is accurate and the installation accuracy meets the requirements.

[0072] The installation process is as follows: First, vertically install the impeller 3 onto the main shaft 1 and assemble it to the target position. After the main shaft 1 cools to room temperature, vertically install the spacer 4 onto the main shaft 1. There are two spacers 4, which need to be installed sequentially. After the spacers 4 cool to room temperature, vertically install the balance disc 5 onto the main shaft 1. When vertically installing the balance disc 5, since the balance disc 5 has threaded holes, the lifting ring can be directly installed into the threaded holes to achieve the lifting and installation of the balance disc 5. Then, install the lifting tools. Install the protective cover 12 on the thrust disc 11 of the main shaft 1. Remove the locking pad 8 and the fixing block. Lift the main shaft 1 from a vertical state to a horizontal state and place it on a horizontal support rod placed on the ground. The horizontal support rod is a wooden rod. The protective cover 12 prevents the thrust disc 11 from contacting the lifting rope during the lifting of the main shaft 1, thus avoiding damage to the lifting rope and improving the safety of lifting the main shaft 1.

[0073] The protective cover 12 includes a protective sleeve 13 and a second connector 14. The protective sleeve 13 has a semi-circular structure, and the second connector 14 is disposed between the protective sleeves 13.

[0074] In this technical solution, since the thrust plate 11 has a disc structure and the protective sleeve 13 has a semi-circular structure, it can be fitted onto the thrust plate 11 to wrap around the outer circumference of the thrust plate 11, preventing the lifting rope from directly contacting the thrust plate 11 during hoisting and avoiding damage to the lifting rope. The second connecting member 14 is installed between the protective sleeves 13 to fix the protective sleeves 13 installed on the thrust plate 11. The second connecting member 14 is a screw and nut. The semi-circular design of the protective sleeve 13 facilitates the installation of the protective cover 9 onto the outer circumference of the thrust plate 11, improving installation efficiency.

[0075] Before step S3, the main shaft 1 needs to be placed on the disc rotor fixture 15, which includes:

[0076] Support 16, the support 16 is used to support the main shaft 1;

[0077] Roller 17 is disposed between the bracket 16 and the main shaft 1.

[0078] In this technical solution, after performing a low-speed dynamic balance test on the main shaft 1, the main shaft 1 needs to be placed on the disc rotor fixture 15 to facilitate the subsequent installation and testing of the moving blade assembly 6. The disc rotor fixture 15 includes a bracket 16 and a roller 17. There are two brackets 16, symmetrically placed on the ground. The roller 17 is mounted on the bracket 16. When the main shaft 1 is placed on the bracket 16, the main shaft 1 is located above the roller 17. The disc rotor fixture 15 facilitates the rotation of the main shaft 1, making it easier to install the moving blade assembly 6 around the main shaft 1.

[0079] The moving blade assembly 6 includes a first-stage moving blade 18, a second-stage moving blade 19, a third-stage moving blade 20, a fourth-stage moving blade 21, a fifth-stage moving blade 22, and a sixth-stage moving blade 23. The main shaft 1 is provided with a first-stage moving blade mounting slot, a second-stage moving blade mounting slot, a third-stage moving blade mounting slot, a fourth-stage moving blade mounting slot, a fifth-stage moving blade mounting slot, and a sixth-stage moving blade mounting slot.

[0080] In this technical solution, the moving blade assembly 6 includes a first-stage moving blade 18, a second-stage moving blade 19, a third-stage moving blade 20, a fourth-stage moving blade 21, a fifth-stage moving blade 22, and a sixth-stage moving blade 23. The main shaft 1 is provided with first-stage moving blade mounting slots, second-stage moving blade mounting slots, third-stage moving blade mounting slots, fourth-stage moving blade mounting slots, fifth-stage moving blade mounting slots, and sixth-stage moving blade mounting slots for installing the first-stage moving blade 18, second-stage moving blade 19, third-stage moving blade 20, fourth-stage moving blade 21, fifth-stage moving blade 22, and sixth-stage moving blade 23. During installation, the first-stage moving blade 18, second-stage moving blade 19, third-stage moving blade 20, fourth-stage moving blade 21, fifth-stage moving blade 22, and sixth-stage moving blade 23 need to be sequentially installed into the first-stage moving blade mounting slots, second-stage moving blade mounting slots, third-stage moving blade mounting slots, fourth-stage moving blade mounting slots, fifth-stage moving blade mounting slots, and sixth-stage moving blade mounting slots to complete the assembly.

[0081] In step S3, the moving blade assembly 6 is installed on the main shaft 1 sequentially according to the drawing requirements, specifically including the following steps:

[0082] S31. The first stage moving blade 18, the second stage moving blade 19, and the third stage moving blade 20 are trial-installed on the main shaft 1.

[0083] S32. The fourth-stage moving blade 21, the fifth-stage moving blade 22, and the sixth-stage moving blade 23 are trial-installed on the main shaft 1;

[0084] S33. The first stage moving blade 18, the second stage moving blade 19, and the third stage moving blade 20 are installed on the main shaft 1;

[0085] S34. The fourth-stage moving blade 21, the fifth-stage moving blade 22, and the sixth-stage moving blade 23 are installed on the main shaft 1;

[0086] S35. Grind and fix the first-stage moving blade 18, the second-stage moving blade 19, the third-stage moving blade 20, the fourth-stage moving blade 21, the fifth-stage moving blade 22, and the sixth-stage moving blade 23 after installation.

[0087] In this technical solution, when handling the moving blade assembly 6 before assembly, it is necessary to avoid deformation or damage. Mark the assembly sequence number on its base using a marker pen according to the weight table of each moving blade. Chamfer the first-stage, second-stage, third-stage, fourth-stage, fifth-stage, and sixth-stage moving blade mounting slots on the main shaft 1, and remove burrs. Perform a trial assembly of the first-stage moving blade 18, second-stage moving blade 19, and third-stage moving blade 20 according to the weight table. After installation, ensure smooth sliding; otherwise, use a file to trim the bottom of the first-stage moving blade 18, second-stage moving blade 19, and third-stage moving blade 20. After installation, use a feeler gauge to check the gap between the bottom of the first-stage moving blade 18, second-stage moving blade 19, and third-stage moving blade 20 and the bottom of the corresponding first-stage, second-stage, and third-stage moving blade mounting slots, and record the checked data.

[0088] According to the weight table, the fourth-stage moving blade 21, the fifth-stage moving blade 22, and the sixth-stage moving blade 23 are trial-installed on the main shaft 1. After assembly, the fourth-stage moving blade 21 base, the fifth-stage moving blade 22 base, and the sixth-stage moving blade 23 base can be smoothly rotated around the main shaft 1 by tapping them with a hand hammer. They do not need to slide freely. Otherwise, the fourth-stage moving blade 21 base, the fifth-stage moving blade 22 base, and the sixth-stage moving blade 23 base need to be corrected with a file. After the trial assembly is completed, the installation sequence is recorded and saved.

[0089] After trial assembly, the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 are installed. During this process, fixing slots are respectively opened in the first-stage moving blade mounting slot, the second-stage moving blade mounting slot, and the third-stage moving blade mounting slot. The fixing plate 25 has an L-shaped structure, with one end installed into the fixing slot. Then, the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 are sequentially installed into the first-stage moving blade mounting slot, the second-stage moving blade mounting slot, and the third-stage moving blade mounting slot. At this time, the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 are all located above the fixing plate 25. 8. After the second-stage moving blade 19 and the third-stage moving blade 20 are installed, the first-stage moving blade mounting slot, the second-stage moving blade mounting slot, and the third-stage moving blade mounting slot are fixed to the other end of the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 by a stop pin. Measure whether the gap between the upper end of the stop pin and the lower end of the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 meets the requirements of the drawing. Then, bend the fixing piece 25 protruding from the first-stage moving blade mounting slot, the second-stage moving blade mounting slot, and the third-stage moving blade mounting slot to fix the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20.

[0090] After trial assembly, mark the center and cut edges of the fourth, fifth, and sixth stage moving blade mounting slots. Punch holes at both ends of the marked lines. Install the fourth stage moving blade 21, fifth stage moving blade 22, and sixth stage moving blade 23 sequentially according to the trial assembly sequence, ensuring a circumferential clearance for each stage of the moving blades. Divide the circumference of each stage of the moving blade into eight equal parts and check the circumferential clearance. Machine the root of eight blades as adjustment blades, with a clearance of 1.0 ± 0.2 mm across the entire circumference. The grinding amount should be within SR / 2 per blade on one side. The adjustment blades should be inserted into symmetrical positions. After installation, check the circumferential clearance of the fourth stage moving blade 21, fifth stage moving blade 22, and sixth stage moving blade 23. Once it meets the drawing standards, use feeler gauges to fix the fourth stage moving blade 21, fifth stage moving blade 22, and sixth stage moving blade 23.

[0091] After the first-stage moving blade 18, the second-stage moving blade 19, the third-stage moving blade 20, the fourth-stage moving blade 21, the fifth-stage moving blade 22, and the sixth-stage moving blade 23 are installed, stop holes and tapping holes are drilled according to the drawings. The first-stage moving blade 18, the second-stage moving blade 19, the third-stage moving blade 20, the fourth-stage moving blade 21, the fifth-stage moving blade 22, and the sixth-stage moving blade 23 are rough ground. According to the actual gear allowance, after rough grinding, stop screws are installed for fixation. Then, the gap between each stage of moving blade is checked using the lead wire method. The actual gap value is measured and compared with the requirements of the drawings. If it does not meet the requirements, the outer edge of the moving blade is ground according to the requirements of the drawings. After meeting the requirements, remove the first-stage moving blade 18, the second-stage moving blade 19, the third-stage moving blade 20, the fourth-stage moving blade 21, the fifth-stage moving blade 22, and the sixth-stage moving blade 23. Clean the burrs on the blades and clean the inside of the first-stage, second-stage, third-stage, fourth-stage, fifth-stage, and sixth-stage moving blade mounting slots. After cleaning, reassemble them and install the stop screws in place. Mill the part of the stop screw protruding from the main shaft 1, grind the head of the stop screw, drill the welding hole for the stop screw, weld the hole, grind it to ensure a smooth surface, and perform a dye penetrant test on the weld.

[0092] In step S33, a fixing plate 25 is installed between the first stage moving blade 18, the second stage moving blade 19, the third stage moving blade 20 and the main shaft 1. The fixing plate 25 is installed by a bending fixture 24.

[0093] The bending fixture 24 includes:

[0094] V-shaped plate 26, the V-shaped plate 26 being disposed on the main shaft 1;

[0095] A drive plate 27 is disposed on the V-shaped plate 26, with one end of it located below the fixing piece 25;

[0096] Pressure plate 28 is disposed on the drive plate 27 and located above the fixing piece 25.

[0097] In this technical solution, fixing slots are respectively provided in the first-stage moving blade mounting slot, the second-stage moving blade mounting slot, and the third-stage moving blade mounting slot. The fixing plate 25 has an L-shaped structure, with one end installed into the fixing slot. Then, the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 are sequentially installed into the first-stage moving blade mounting slot, the second-stage moving blade mounting slot, and the third-stage moving blade mounting slot. At this time, the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 are all located above the fixing plate 25. After the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 are installed, the first-stage moving blade mounting slot, the second-stage moving blade mounting slot, and the third-stage moving blade mounting slot are connected to the first-stage moving blade 18 and the second-stage moving blade 19. The other end of the third-stage moving blade 20 is fixed by a stop pin. A V-shaped plate 26 is installed on the main shaft 1 on the side of the fixed plate 25 that protrudes from the first-stage moving blade mounting groove, the second-stage moving blade mounting groove, and the third-stage moving blade mounting groove. The drive plate 27 is placed above the V-shaped plate 26 near one end. At this time, the other end of the drive plate 27 is located at the bottom of the protruding fixed plate 25. Then, the pressure plate 28 is fixed to the drive plate 27 by bolts. At this time, the fixed plate 25 is clamped between the drive plate 27 and the pressure plate 28. The operator drives the drive plate 27 upward to move it, so that the protruding part of the fixed plate 25 is bent upward, which can fix the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20.

[0098] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A method for assembling a rotor component, characterized in that, Includes the following steps: S1. Install the protective fixture (2) on the first end of the spindle (1) and complete the vertical placement of the spindle (1); S2. Install the impeller (3), spacer (4) and balance disc (5) on the main shaft (1) in sequence according to the drawing requirements. After installation, place the main shaft (1) horizontally and perform low-speed dynamic balance test on it. S3. Install the moving blade assembly (6) onto the main shaft (1) in sequence according to the drawing requirements and trim the moving blade assembly (6); S4. Perform low-speed and high-speed dynamic balance measurements on the spindle (1). After the measurements meet the requirements, install the coupling. In the S2, when installing the balance disc (5), a lifting ring needs to be installed on the balance disc (5). The balance disc (5) is hoisted onto the main shaft (1) and installed using the lifting ring. Then, the main shaft (1) is placed horizontally using the lifting ring. During this process, a protective cover (12) needs to be installed on the thrust disc (11) of the main shaft (1). The moving blade assembly (6) includes a first-stage moving blade (18), a second-stage moving blade (19), a third-stage moving blade (20), a fourth-stage moving blade (21), a fifth-stage moving blade (22), and a sixth-stage moving blade (23). The main shaft (1) is provided with a first-stage moving blade mounting slot, a second-stage moving blade mounting slot, a third-stage moving blade mounting slot, a fourth-stage moving blade mounting slot, a fifth-stage moving blade mounting slot, and a sixth-stage moving blade mounting slot. In step S3, the moving blade assembly (6) is installed on the main shaft (1) in sequence according to the drawing requirements, specifically including the following steps: S31. The first stage moving blade (18), the second stage moving blade (19), and the third stage moving blade (20) are tested on the main shaft (1); S32. The fourth stage moving blade (21), the fifth stage moving blade (22), and the sixth stage moving blade (23) are tested and installed on the main shaft (1); S33. The first stage moving blade (18), the second stage moving blade (19), and the third stage moving blade (20) are mounted on the main shaft (1); S34. The fourth-stage moving blade (21), the fifth-stage moving blade (22), and the sixth-stage moving blade (23) are installed on the main shaft (1); S35. Grind and fix the first-stage moving blade (18), second-stage moving blade (19), third-stage moving blade (20), fourth-stage moving blade (21), fifth-stage moving blade (22), and sixth-stage moving blade (23) after installation. In step S33, a fixing plate (25) is installed between the first stage moving blade (18), the second stage moving blade (19), the third stage moving blade (20) and the main shaft (1). The fixing plate (25) is installed by a bending tool (24). The bending fixture (24) includes: V-shaped plate (26), the V-shaped plate (26) is disposed on the main shaft (1); A drive plate (27) is disposed on the V-shaped plate (26), and one end of the drive plate (27) is located below the fixing piece (25); Pressure plate (28) is disposed on the drive plate (27) and located above the fixing plate (25).

2. The rotor component assembly method according to claim 1, characterized in that, Step S1 includes the following steps: S11. Install the protective fixture (2) on the first end of the main shaft (1), and lift the main shaft (1) upright and place it on the support pad (7). Before installation, test the support pad (7) to ensure that the levelness is ≤0.10mm / m. S12. Install the locking pad (8) on the support pad (7) and lock the spindle (1) on the locking pad (8), and measure the levelness to ensure that the levelness is ≤0.10mm / m.

3. The rotor component assembly method according to claim 2, characterized in that, The protective tooling (2) includes: A protective cover (9) is provided inside the protective cover (9) and a mounting groove that matches the first end of the main shaft (1); The first connector (10) is connected to the protective cover (9) and the first end of the main shaft (1).

4. The rotor component assembly method according to claim 3, characterized in that, The protective cover (12) includes a protective sleeve (13) and a second connector (14). The protective sleeve (13) has a semi-circular structure, and the second connector (14) is disposed between the protective sleeves (13).

5. The rotor component assembly method according to claim 4, characterized in that, Before step S3, the spindle (1) needs to be placed on the disc rotor fixture (15), which includes: A bracket (16) is used to support the main shaft (1); A roller (17) is disposed between the bracket (16) and the main shaft (1).

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