Rotor part assembling method

Abstract

The invention provides a rotor part assembling method. The rotor part assembling method comprises the following steps that S1, a protection tool is installed at the first end of a main shaft, and vertical placement of the main shaft is completed; s2, an impeller, a spacer bush and a balance disc are sequentially installed on the main shaft according to drawing requirements, and after installation is completed, the main shaft is horizontally placed and subjected to low-speed dynamic balance detection; s3, moving blade assemblies are sequentially installed on the main shaft according to the drawing requirements, and the moving blade assemblies are trimmed; the impeller, the spacer bush, the balance disc and the movable blade assembly can be sequentially installed on the main shaft, assembling of the rotor is achieved, through cooperation of the protection tool, the protection cover, the disc rotor tool and the bending tool, the installing efficiency and the installing quality are improved, the assembling process is controlled, and the assembling precision and the assembling quality are guaranteed.

Description

Technical Field

[0001] This application belongs to the technical field of compressors, and particularly relates to a method for assembling rotor components. Background Art

[0002] The axial-flow centrifugal compressor rotor, as the core component of the axial-flow compressor, plays a crucial role. The axial-flow + centrifugal rotor mainly consists of components such as blades, impellers, and shafts. It is a high-speed rotating component that drives gas flow through the rotation of the blades and impellers to achieve gas compression or transportation.

[0003] The working principle of the axial-flow centrifugal rotor is that after gas enters the rotor from the suction end, it is continuously compressed and accelerated under the action of the impeller and blades, and finally high-pressure gas is output at the exhaust end. Its working process includes three stages: the intake process, the compression process, and the exhaust process. As the rotor rotates, gas enters from the suction end, gradually accelerates under the action of the spacer impeller and blades, forms a flow in the flow path between the impellers, and flows backward towards the outlet. After entering the compression section, the gas is infinitely compressed by the blades, and at the same time, the pressure and temperature of the gas continuously increase. When the gas is completely compressed and reaches the exhaust section, the gas pressure has reached the design requirements. In the exhaust section, under the action of the energy-releasing blades, energy is converted into pressure, and the accelerated gas passes through the air release port and is discharged from the compressor.

[0004] The axial-flow centrifugal rotor is one of the key components of the axial-flow compressor or axial-flow fan, and its performance directly affects the operating efficiency and stability of the entire equipment. Therefore, the assembly of the axial-flow centrifugal rotor is very important for the normal operation of the compressor. The assembly process should ensure the assembly accuracy of the rotor and avoid friction during the operation of the entire unit and abnormal vibration of the unit caused by the rotor, resulting in 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 technologies.

[0006] To solve the above problems, this application provides a method for assembling rotor components, including the following steps:

[0007] S1. Install a protective tooling on the first end of the main shaft and complete the vertical placement of the main shaft;

[0008] S2. Install the impeller, spacer sleeve, and balance disk on 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 on it;

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

[0010] S4. The root performs low-speed and high-speed dynamic balance measurements on the main shaft. After the measurements meet the requirements, the coupling is installed.

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

[0012] S11. Install the protective tooling on the first end of the main shaft, lift the main shaft and place it vertically on the support backing plate. Before installation, detect the support backing plate to ensure that the levelness ≤ 0.10 mm / m.

[0013] S12. Install the locking backing plate on the support backing plate and lock and fix the main shaft on the locking backing plate, and measure the levelness to ensure that the levelness ≤ 0.10 mm / m.

[0014] Optionally, the protective tooling includes:

[0015] A protective cover with an installation groove formed inside that matches the first end of the main shaft.

[0016] A first connecting piece that connects the protective cover and the first end of the main shaft.

[0017] Optionally, when installing the balance disk in S2, a lifting ring needs to be installed on the balance disk. The balance disk is hoisted onto the main shaft and installed through the lifting ring, and then the main shaft is horizontally placed through the lifting ring. During this process, a protective cover needs to be installed on the thrust disk of the main shaft.

[0018] Optionally, the protective cover includes a protective sleeve and a second connecting piece. The protective sleeve is of a semi-circular structure, and the second connecting piece is arranged between the protective sleeves.

[0019] Optionally, before S3, the main shaft needs to be placed on the disk rotor tooling. The disk rotor tooling includes:

[0020] A bracket for carrying the main shaft.

[0021] Rollers arranged 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. The main shaft is provided with a first-stage moving blade installation groove, a second-stage moving blade installation groove, a third-stage moving blade installation groove, a fourth-stage moving blade installation groove, a fifth-stage moving blade installation groove, and a sixth-stage moving blade installation groove.

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

[0024] S31. Try assembling the first-stage moving blade, second-stage moving blade, and third-stage moving blade on the main shaft;

[0025] S32. Try assembling the fourth-stage moving blade, fifth-stage moving blade, and sixth-stage moving blade on the main shaft;

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

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

[0028] S35. Grind and fix the installed 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.

[0029] Optionally, in step S33, install fixing pieces between the first-stage moving blade, second-stage moving blade, third-stage moving blade and the main shaft, and install the fixing pieces through a bending tooling.

[0030] Optionally, the bending tooling includes:

[0031] A V-shaped plate which is arranged on the main shaft;

[0032] A driving plate which is arranged on the V-shaped plate and one end of which is located below the fixing piece;

[0033] A pressing plate which is arranged on the driving plate and is located above the fixing piece.

[0034] Beneficial effects

[0035] A rotor component assembly method provided in an embodiment of the present invention can realize sequentially installing an impeller, a spacer sleeve, a balance disk and a moving blade assembly on a main shaft to complete the assembly of the rotor. Moreover, through the cooperation of a protective tooling, a protective cover, a disk rotor tooling and a bending tooling, the installation efficiency and installation quality are improved, the control of the assembly process is realized, and the assembly precision and assembly quality are ensured. Description of the drawings

[0036] Figure 1 is a flow chart of the present application;

[0037] Figure 2 is a structural diagram of the main shaft after assembly of the present application;

[0038] Figure 3 is a structural diagram of the main shaft of the present application hoisted onto a support backing plate and a locking backing plate;

[0039] Figure 4 is a structural diagram of the protective tooling of the present application;

[0040] Figure 5 Structural diagram of the balance disk for this application;

[0041] Figure 6 Structural diagram of the protective cover installation for this application;

[0042] Figure 7 Structural diagram of the spindle support by the disk rotor tooling for this application;

[0043] Figure 8 Front view structural diagram of the bending tooling for this application;

[0044] Figure 9 Side view structural diagram of the bending tooling for this application.

[0045] The reference signs are shown as:

[0046] 1, main shaft; 2, protective tooling; 3, impeller; 4, spacer sleeve; 5, balance disk; 6, moving blade assembly; 7, support backing plate; 8, locking backing plate; 9, protective cover; 10, first connecting piece; 11, thrust disk; 12, protective cover; 13, protective sleeve; 14, second connecting piece; 15, disk rotor tooling; 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 tooling; 25, fixing piece; 26, V-shaped plate; 27, driving plate; 28, pressing plate. Detailed implementation manners

[0047] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0048] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0049] In this application, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0051] See in conjunction Figures 1-9 As shown, according to an embodiment of the present application, a rotor component assembly method is provided, including the following steps:

[0052] S1. Install a protective tooling 2 on the first end of the main shaft 1 and complete the vertical placement of the main shaft 1;

[0053] S2. Install the impeller 3, spacer sleeve 4, and balance disk 5 on 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 on 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 balance measurements on the main shaft 1. After the measurements meet the requirements, install the coupling.

[0056] Specifically, the structure of the main shaft 1 after assembly includes: the main shaft 1, impeller 3, spacer sleeve 4, balance disk 5, moving blade assembly 6, thrust disk 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 the main shaft 1 and all components, and grind the edges of the parts to be assembled smoothly to remove burrs and sharp points. Heat the hot-fitted parts and measure the hot-fitted parts to ensure that the error between the hot-fitted parts and the main shaft 1 is within a reasonable range. To prevent deformation or surface oxidation during hot fitting, all parts must be heated evenly, and the heating temperature shall not be greater than 350 - 400 °C, and the holding time shall not be less than 2 hours. Before hot fitting, measure the actual mating clearance. The measured inner hole size of the workpiece before hot fitting is ≥ 0.30 mm larger than the actual size of the main shaft 1 for assembly.

[0057] A threaded hole is provided at the first end of the main shaft 1. The protective tooling 2 is installed on the first end of the main shaft 1 to protect the main shaft 1 during hoisting. Threads are provided on the main shaft 1, and the hoisting workpiece is threadedly connected to the main shaft 1 and adjusted from a horizontal state to a vertical state to provide a basis for subsequent installation.

[0058] The impeller 3 is vertically installed on the main shaft 1 by hoisting. After the main shaft 1 cools to room temperature, a hoisting tool is installed on the spacer sleeve 4 and vertically installed on the main shaft 1. After the spacer sleeve 4 cools to room temperature, a lifting ring is installed on the side of the balance disk 5 and vertically installed on the main shaft 1. After the installation is completed, the main shaft 1 is hoisted from a vertical state to a horizontal state, the surface of the main shaft 1 is cleaned, and fixing pins and screws are installed between the balance disk 5 and the main shaft 1. After cutting off the protruding part of the screw after installation, it is trimmed and punched at three points for fixation. The main shaft 1, impeller 3, spacer sleeve 4, and balance disk 5 are measured by dial indicator, and the main shaft 1, impeller 3, spacer sleeve 4, and balance disk 5 are turned according to the requirements of the drawing for the amount of expansion, processed to meet the drawing dimensions, and the arc is smoothly transitioned; the main shaft 1 is subjected to low-speed dynamic balance detection, and the vibration requirements for the maximum continuous, tripping, and first-order speeds meet API617.

[0059] After the inspection is qualified, the moving blade assembly 6 is successively installed on the main shaft 1 according to the drawing requirements, and the installed moving blade assembly 6 is 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 balance measurement. After the measurement meets the standard, the connection surface between the inner hole of the coupling and the main shaft 1 is cleaned, the half-coupling and the flexible component are installed, the locking pins and gaskets are installed, and the gap between the flexible component and the half-coupling is ensured to be consistent, and the assembly zero point of the half-coupling is confirmed; the rubber ring is installed, and the rotor half-coupling is installed by hydraulic means. After the half-coupling is assembled in place, the high-pressure pump slowly releases pressure, and the low-pressure pump maintains pressure for no less than 60 minutes, and the assembly of the main shaft 1 is successfully completed, ensuring the assembly accuracy and assembly quality of the main shaft 1.

[0061] In step S1, the following steps are included:

[0062] S11. Install the protective tooling 2 on the first end of the main shaft 1, hoist the main shaft 1 and place it vertically on the support pad 7. Before installation, the support pad 7 is inspected to ensure that the levelness ≤ 0.10 mm / m;

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

[0064] Specifically, before assembling the main shaft 1, the assembly site needs to be cleaned first. An assembly groove is provided on the ground of the assembly site. Lift the lifting support pad 7 to the assembly site, adjust the relative position of the support pad 7 and the assembly groove, and install the support pad 7 above the assembly groove. Assembly holes are provided at the positions on the support pad 7 that match the assembly groove. Use a level to measure the levelness of the support pad 7, ensuring that the levelness ≤ 0.10 mm / m. After the protective tooling 2 is installed on the first end of the main shaft 1, lift and place the main shaft 1 on the support pad 7 through a lifting tool. At this time, the first end of the main shaft 1 is located in the assembly groove, achieving the horizontal adjustment of the main shaft 1 to the vertical state. During the lifting process, the operation should be slow. When the distance between the first end of the main shaft 1 and the support pad 7 is 50 mm during the downward movement of the first end of the main shaft 1, lower it slowly until the main shaft 1 contacts the support pad 7, reducing the damage to the main shaft 1 caused by knocking. At this time, the support pad 7 is clamped below the installation position of the first-stage moving blade 18 of the main shaft 1, realizing the fixation of the main shaft 1.

[0065] Install the locking pad 8 above the support pad 7. Uniformly place eight fixing blocks in the circumferential direction of the locking pad 8 and make them contact the five-stage moving blade installation groove of the main shaft 1 to realize the fixation of the main shaft 1. After installation, place a spirit level on the end face of the thrust disk 11 and ensure that the levelness ≤ 0.10 mm / m for subsequent installation work.

[0066] The protective tooling 2 includes:

[0067] A protective cover 9, and an installation groove matching the first end of the main shaft 1 is provided inside the protective cover 9;

[0068] A first connecting piece 10, and the first connecting piece 10 is connected to the protective cover 9 and the first end of the main shaft 1.

[0069] In this technical solution, the protective tooling 2 is used to protect the first end of the main shaft 1. An installation groove matching the first end of the main shaft 1 is provided thereon. Threaded holes are provided on the first end of the main shaft 1 itself. During use, the protective cover 9 can be installed on the first end of the main shaft 1, and then the protective cover 9 can be fixedly installed on the first end of the main shaft 1 through the first connecting piece 10, avoiding damage to the main shaft 1 during the lifting or assembly process of the main shaft 1 and improving the quality of the main shaft 1 after assembly.

[0070] In step S2, when installing the balance disk 55, a lifting ring needs to be installed on the balance disk 55. Lift and install the balance disk 55 onto the main shaft 11 through the lifting ring, and then horizontally place the main shaft 11 through the lifting ring. During this process, a protective cover 1212 needs to be installed on the thrust disk 1111 of the main shaft 11.

[0071] In this technical solution, after the locking backing plate 8 fixes the main shaft 1, the impeller 3, the spacer sleeve 4 and the balance disk 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-fitting process code for the blower rotor group to ensure accurate installation positions and installation accuracies that meet the requirements.

[0072] The installation process is as follows: vertically install the impeller 3 onto the main shaft 1 and assemble it to the target position. After the main shaft 1 cools down to normal temperature, vertically install the spacer sleeve 4 onto the main shaft 1. Among them, the number of spacer sleeves 4 is two, and they need to be installed in sequence. After the spacer sleeve 4 cools down to normal temperature, vertically install the balance disk 5 onto the main shaft 1. When vertically installing the balance disk 5, since there are threaded holes on the balance disk 5, the lifting ring can be directly installed into the threaded holes to realize the hoisting and installation of the balance disk 5. Then install the hoisting tool, install the protective cover 12 on the thrust disk 11 of the main shaft 1, remove the locking backing plate 8 and the fixing block, hoist the main shaft 1 to convert it from a vertical state to a horizontal state, and place it on the horizontal cushion rod placed on the ground. The horizontal cushion rod is a wooden rod. Through the setting of the protective cover 12, it is avoided that during the hoisting of the main shaft 1, the thrust disk 11 touches the hoisting rope, resulting in damage to the hoisting rope, and the safety of hoisting the main shaft 1 is improved.

[0073] The protective cover 12 includes a protective sleeve 13 and a second connecting member 14. The protective sleeve 13 is of a semi-circular structure, and the second connecting member 14 is arranged between the protective sleeves 13.

[0074] In this technical solution, since the thrust disk 11 is of a disc structure and the protective sleeve 13 is of a semi-circular ring structure, it can be sleeved on the thrust disk 11 to wrap the outer circumference of the thrust disk 11, avoiding direct contact between the hoisting rope and the thrust disk 11 during hoisting and preventing damage to the hoisting rope. The second connecting member 14 is installed between the protective sleeves 13 to fix the protective sleeve 13 installed on the thrust disk 11. The second connecting member 14 is a screw and a nut. Through the setting of the protective sleeve 13 as a semi-circular ring, it is convenient to install the protective cover 9 on the outer circumference of the thrust disk 11, improving the installation efficiency.

[0075] Before S3, the main shaft 1 needs to be placed on the rotor disk fixture 15. The rotor disk fixture 15 includes:

[0076] A bracket 16, which is used to carry the main shaft 1;

[0077] A roller 17, which is arranged between the bracket 16 and the main shaft 1.

[0078] In this technical solution, after the low-speed dynamic balance detection of the main shaft 1, the main shaft 1 needs to be placed on the disk rotor tooling 15 to facilitate the subsequent installation and detection of the moving blade assembly 6. The disk rotor tooling 15 includes a bracket 16 and a roller 17. The number of brackets 16 is two, which are symmetrically placed on the ground. The roller 17 is installed 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. Through the setting of the disk rotor tooling 15, it is convenient to rotate the main shaft 1, which facilitates the subsequent installation of the moving blade assembly 6 in the circumferential direction of 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 installation groove, a second-stage moving blade installation groove, a third-stage moving blade installation groove, a fourth-stage moving blade installation groove, a fifth-stage moving blade installation groove, and a sixth-stage moving blade installation groove.

[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. And on the main shaft 1, there are provided a first-stage moving blade installation groove, a second-stage moving blade installation groove, a third-stage moving blade installation groove, a fourth-stage moving blade installation groove, a fifth-stage moving blade installation groove, and a sixth-stage moving blade installation groove for the installation of 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. During the installation process, it is necessary to sequentially install 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 into the first-stage moving blade installation groove, the second-stage moving blade installation groove, the third-stage moving blade installation groove, the fourth-stage moving blade installation groove, the fifth-stage moving blade installation groove, and the sixth-stage moving blade installation groove to complete the assembly.

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

[0082] S31. Try to install the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 on the main shaft 1;

[0083] S32. Try to install the fourth-stage moving blade 21, the fifth-stage moving blade 22, and the sixth-stage moving blade 23 on the main shaft 1;

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

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

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

[0087] In this technical solution, when taking the moving blade assembly 6 before assembling it, it is necessary to avoid deforming or damaging it. Mark the assembly sequence numbers on its base with a marker pen according to the weight table of each moving blade. Trim the chamfers of the first-stage moving blade installation groove, second-stage moving blade installation groove, third-stage moving blade installation groove, fourth-stage moving blade installation groove, fifth-stage moving blade installation groove, and sixth-stage moving blade installation groove on the main shaft 1, and clean the burrs. Try to install the first-stage moving blades 18, second-stage moving blades 19, and third-stage moving blades 20 according to the weight table. After installation, ensure that they can slide smoothly. Otherwise, use a set of files to trim the bottoms of the first-stage moving blades 18, second-stage moving blades 19, and third-stage moving blades 20. After installation, use a feeler gauge to check the gaps between the bottoms of the first-stage moving blades 18, second-stage moving blades 19, and third-stage moving blades 20 and the bottoms of the corresponding first-stage moving blade installation groove, second-stage moving blade installation groove, and third-stage moving blade installation groove, and record the inspection data.

[0088] According to the weight table, try to install the fourth-stage moving blades 21, fifth-stage moving blades 22, and sixth-stage moving blades 23 on the main shaft 1. After assembly, tap the bases of the fourth-stage moving blades 21, fifth-stage moving blades 22, and sixth-stage moving blades 23 with a hammer, and they can rotate smoothly around the main shaft 1 for one week. It is not necessary to slide smoothly. Otherwise, use a set of files to correct the bases of the fourth-stage moving blades 21, fifth-stage moving blades 22, and sixth-stage moving blades 23. After the trial installation is completed, record and save them in the installation order.

[0089] After the trial assembly is completed, install the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20. During this process, fixing grooves are respectively provided in the first-stage moving blade installation groove, the second-stage moving blade installation groove, and the third-stage moving blade installation groove. The fixing piece 25 is L-shaped, one end of which is installed into the fixing groove, and 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 installation groove, the second-stage moving blade installation groove, and the third-stage moving blade installation groove. 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 piece 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 installation groove, the second-stage moving blade installation groove, the third-stage moving blade installation groove and the other ends of the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 are fixed by a stop pin. Measure whether the gap between the upper end of the stop pin and the lower ends 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, and then bend the fixing piece 25 protruding from the first-stage moving blade installation groove, the second-stage moving blade installation groove, and the third-stage moving blade installation groove to fix the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20.

[0090] After the trial assembly is completed, mark the center and the cut part of the fourth-stage moving blade installation groove, the fifth-stage moving blade installation groove, and the sixth-stage moving blade installation groove, punch holes at both ends of the marking, and sequentially install the fourth-stage moving blade 21, the fifth-stage moving blade 22, and the sixth-stage moving blade 23 in the order of the trial assembly. Reserve the circumferential clearance after the installation of each stage of the moving blade. Each stage of the moving blade must be equally divided into 8 parts in the circumferential direction to detect the circumferential clearance. Machine the blade roots of 8 blades as adjusting blades according to a clearance of 1.0 ± 0.2 mm in the whole circumference, and the grinding amount is within SR / 2 on one side of a single piece. The adjusting blades should be inserted into the symmetric positions. After the installation is completed, check the circumferential clearances of the fourth-stage moving blade 21, the fifth-stage moving blade 22, and the sixth-stage moving blade 23. After meeting the drawing standards, use a feeler gauge to fix the fourth-stage moving blade 21, the fifth-stage moving blade 22, and the 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, drill the stop holes and tap the screw holes according to the requirements of the drawing. Rough grind 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, leaving a margin according to the actual gear. After rough grinding, install the stop screws for fixation. Then, use the wire method to check the clearance between the moving blades at all levels, measure the actual clearance value and compare it with the requirements of the drawing. If it does not meet the requirements, grind the outer edge of the moving blade according to the drawing requirements. 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 installation grooves for the first-stage moving blade, the second-stage moving blade, the third-stage moving blade, the fourth-stage moving blade, the fifth-stage moving blade and the sixth-stage moving blade. After cleaning, reinstall them, 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 opening for the stop screw, and perform welding and grinding on the opening to ensure a smooth surface, and conduct penetrant inspection on the welded part.

[0092] In the step S33, a fixing piece 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, and the fixing piece 25 is installed by a bending tooling 24.

[0093] The bending tooling 24 includes:

[0094] A V-shaped plate 26, which is arranged on the main shaft 1;

[0095] A driving plate 27, which is arranged on the V-shaped plate 26 and one end of which is located below the fixing piece 25;

[0096] A pressing plate 28, which is arranged on the driving plate 27 and located above the fixing piece 25.

[0097] In this technical solution, fixing grooves are respectively formed in the first-stage moving blade installation groove, the second-stage moving blade installation groove, and the third-stage moving blade installation groove. The structure of the fixing piece 25 is L-shaped. One end of it is installed in the fixing groove, and then the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 are sequentially installed in the first-stage moving blade installation groove, the second-stage moving blade installation groove, and the third-stage moving blade installation groove. 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 piece 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 installation groove, the second-stage moving blade installation groove, the third-stage moving blade installation groove and the other ends of the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 are fixed by a stop pin. A V-shaped plate 26 is installed on the main shaft 1 on the side where the fixing piece 25 protrudes from the first-stage moving blade installation groove, the second-stage moving blade installation groove, and the third-stage moving blade installation groove. The driving plate 27 is placed above the V-shaped plate 26 near one end position. At this time, the other end of the driving plate 27 is located at the bottom of the protruding fixing piece 25. Then, the pressing plate 28 is fixed on the driving plate 27 by bolts. At this time, the fixing piece 25 is clamped between the driving plate 27 and the pressing plate 28. The staff drives the driving plate 27 upward to move, so that the protruding part of the fixing piece 25 can be bent upward, and the first-stage moving blade 18, the second-stage moving blade 19, and the third-stage moving blade 20 can be fixed.

[0098] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present application, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A method for assembling a rotor component, characterized in that: The following steps are involved: S1. Installing a protective tool (2) on the first end of the main shaft (1) and placing the main shaft (1) in a vertical position; S2. Install the impeller (3), the spacer (4) and the balancing disc (5) on the main shaft (1) in sequence according to the requirements of the drawing. After the installation is completed, place the main shaft (1) horizontally and perform a low-speed dynamic balancing test on it; S3, according to the requirements of the drawings, the moving blade assembly (6) is installed on the main shaft (1) in sequence and the moving blade assembly (6) is trimmed; S4. Perform low-speed and high-speed dynamic balancing measurements on the main shaft (1). Install the coupling after the measurements meet the requirements.

2. The rotor component assembly method according to claim 1, characterized in that: Step S1 includes the following steps: S11, installing the protective tooling (2) on the first end of the main shaft (1), and lifting the main shaft (1) and placing it upright on the supporting pad (7), and inspecting the supporting pad (7) before installation to ensure that the horizontality is ≤0.10 mm / m; S12, installing a locking pad (8) on the supporting pad (7) and locking and fixing the main shaft (1) on the locking pad (8), and measuring the levelness to ensure that the levelness is ≤0.10 mm / m.

3. The rotor component assembly method according to claim 2, characterized in that: The protective tooling (2) comprises: A protective cover (9), wherein a mounting groove matching the first end of the main shaft (1) is provided inside the protective cover (9); A first connecting member (10), wherein the first connecting member (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: In S2, when installing the balancing plate (5), a lifting ring needs to be installed on the balancing plate (5), and the balancing plate (5) is lifted and installed on the main shaft (1) through the lifting ring, and then the main shaft (1) is placed horizontally through the lifting ring. During this process, a protective cover (12) needs to be installed on the thrust plate (11) of the main shaft (1).

5. The rotor component assembly method according to claim 4, characterized in that: The protective cover (12) comprises a protective sleeve (13) and a second connecting member (14); the protective sleeve (13) is a semicircular structure; and the second connecting member (14) is arranged between the protective sleeves (13).

6. The rotor component assembly method according to claim 5, characterized in that: Before S3, the main shaft (1) needs to be placed on a disc rotor tooling (15), and the disc rotor tooling (15) includes: A bracket (16), wherein the bracket (16) is used to support the main shaft (1); A roller (17), wherein the roller (17) is arranged between the bracket (16) and the main shaft (1).

7. The rotor component assembly method according to claim 6, characterized in that: The moving blade assembly (6) comprises 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), and the main shaft (1) is provided with a first-stage moving blade mounting groove, a second-stage moving blade mounting groove, a third-stage moving blade mounting groove, a fourth-stage moving blade mounting groove, a fifth-stage moving blade mounting groove and a sixth-stage moving blade mounting groove.

8. The rotor component assembly method according to claim 7, characterized in that: In the step S3, the moving blade assembly (6) is installed on the main shaft (1) in sequence according to the requirements of the drawing, which specifically includes the following steps: S31, test-mounting the first-stage moving blades (18), the second-stage moving blades (19), and the third-stage moving blades (20) on the main shaft (1); S32, test-mounting the fourth-stage moving blade (21), the fifth-stage moving blade (22), and the sixth-stage moving blade (23) on the main shaft (1); S33, installing the first-stage moving blades (18), the second-stage moving blades (19), and the third-stage moving blades (20) on the main shaft (1); S34, installing the fourth-stage moving blade (21), the fifth-stage moving blade (22), and the sixth-stage moving blade (23) on the main shaft (1); S35, grinding and fixing the installed first-stage moving blades (18), second-stage moving blades (19), third-stage moving blades (20), fourth-stage moving blades (21), fifth-stage moving blades (22), and sixth-stage moving blades (23).

9. The rotor component assembly method according to claim 8, characterized in that: In the 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), and the fixing plate (25) is installed by means of a bending tool (24).

10. The rotor component assembly method according to claim 9, characterized in that: The bending tool (24) comprises: A V-shaped plate (26), wherein the V-shaped plate (26) is arranged on the main shaft (1); a driving plate (27), wherein the driving plate (27) is disposed on the V-shaped plate (26), and one end of the driving plate (27) is located below the fixing plate (25); A pressing plate (28), wherein the pressing plate (28) is arranged on the driving plate (27) and is located above the fixing plate (25).

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