Assembling method of large-scale shaft-penetrating type permanent magnet shaft generator

Abstract

The invention discloses an assembling method of a large-scale shaft-penetrating type permanent magnet shaft generator, which is characterized in that the large-scale shaft-penetrating type permanent magnet shaft generator comprises a shaft generator shaft and a shaft generator body, the shaft generator body comprises a rotor and a stator, and the assembling method comprises the following steps: laying a supporting device on the flat ground, processing a section of tool shaft according to the flange size of the penetrating end of the shaft generator shaft, the sleeve is machined according to the outer diameter size of the tool shaft, the shaft generator shaft is moved to the direction of the shaft generator body, and when the flange face of the shaft generator shaft is attached to the flange face of the rotor, the flange of the shaft generator shaft and the flange of the rotor are connected through bolts. According to the assembling method of the large shaft-penetrating type permanent magnet shaft generator, through the innovative design of transverse assembling on the ground, body fixing, gravity center balancing through a tool shaft, sleeve guiding and the like, the remarkable advantages and beneficial effects are achieved in the aspects of operation convenience, assembling stability and the like; and a more efficient, reliable and safe solution is provided for the assembly of the large-scale shaft-penetrating type permanent magnet shaft generator.

Description

Technical Field

[0001] The invention belongs to the technical field of ships, and in particular relates to an assembling method of a large-scale through-shaft permanent magnet shaft generator. Background Art

[0002] Large-scale shaft-through permanent magnet shaft generators, also known as shaft generators, are shipped with the generator shaft and generator body packaged separately. Upon arrival, the generator shaft is a single unit, while the generator body consists of a single stator and rotor.

[0003] To shorten the maintenance cycle, the shaft generator shaft needs to be inserted into the generator body at the factory after receipt. Therefore, a method is needed to quickly and accurately install large-scale shaft-through permanent magnet shaft generators. Summary of the Invention

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for assembling a large-scale through-shaft permanent magnet shaft-mounted generator, comprising a shaft-generating shaft and a shaft-generating generator body, wherein the shaft-generating generator body comprises a rotor and a stator, and the steps include:

[0006] S1: Laying a support device on flat ground, and placing the shaft generator body on the support device;

[0007] S2: machining a tooling shaft according to the flange size of the insertion end of the shaft-launching shaft, and connecting the tooling shaft to the insertion end of the shaft-launching shaft by bolts;

[0008] S3: Processing a sleeve according to the outer diameter of the tooling shaft, with the inner diameter of the sleeve being clearance-matched with the outer diameter of the tooling shaft, adjusting the inner hole of the sleeve and the inner hole of the shaft generator body to be coaxial, and fixing the sleeve to one end of the support device;

[0009] S4: inserting the shaft generator shaft connected to the tooling shaft into the inner hole of the shaft generator body until the tooling shaft enters the sleeve;

[0010] S5: Continue to move the generator shaft toward the generator body, and when the flange surface of the generator shaft is in contact with the flange surface of the rotor, connect the flange of the generator shaft and the flange of the rotor with bolts;

[0011] S6: Remove the tooling shaft to complete the assembly.

[0012] As a further solution of the present invention, the support device includes a steel plate, an I-beam, and a spacer. The steel plate is laid on the ground, the I-beam is welded to both ends of the steel plate, and the spacers are welded to the I-beam at intervals. The spacers are positioned to avoid areas of the generator body that require machining. The spacers are provided with through holes that match the positions of the jacking bolt holes at the bottom of the generator body.

[0013] The step S1 further includes: placing the shaft generator body on the supporting device by using a crane, aligning the jacking bolt holes at the bottom of the shaft generator body with the through holes of the cushion block, and connecting the shaft generator body to the cushion block by using jacking bolts.

[0014] As a further solution of the present invention: the step S2 further includes: a gasket is provided on the contact surface between the shaft-launching shaft and the tooling shaft.

[0015] As a further solution of the present invention: Step S3 also includes: using a laser alignment instrument to adjust the inner hole of the sleeve and the inner hole of the shaft generator body to a coaxial state; fixing the sleeve to the support device with bolts, and then welding the sleeve to the support device.

[0016] As a further solution of the present invention: Step S4 further includes:

[0017] S410: Connecting both sides of the shaft to a lifting device; the lifting device includes a lifting belt, a dynamometer, and a hoist; the lifting belt is connected to the dynamometer, and the dynamometer is connected to the hoist;

[0018] S420: After lifting, observe the parameters of the dynamometer and adjust the shaft to a horizontal position through the hoist; when the tooling shaft contacts the guide cone surface of the sleeve, observe the dynamometer reading to assist in adjusting the position and angle of the shaft so that the tooling shaft passes through the sleeve.

[0019] As a further solution of the present invention: Step S5 further includes:

[0020] S510: dismantling the hoisting device close to the shaft generator body, connecting the hoisting device to the tooling shaft, lifting the tooling shaft, and continuing to move the shaft generator shaft toward the shaft generator body;

[0021] S520: When the flange surface of the shaft generator shaft is close to the flange surface of the rotor, a tray is connected to the side close to the shaft generator body, and the tray is lifted by a hoist;

[0022] S530: tighten the hoist of the pallet, and when the pallet is stressed, dismantle the lifting device;

[0023] S540: Installing a rotating shaft crowbar on the tooling shaft, rotating the tooling shaft with the rotating shaft crowbar so that the mounting hole of the shaft-generating shaft is aligned with the flange hole of the rotor; passing a bolt through the mounting hole and the flange hole;

[0024] S550: Connect the lifting devices again on both sides of the shaft-launching shaft, remove the pallet and the shaft crowbar, install a lifting ring on the tooling shaft, and connect the lifting ring to a lifting hoist; pull the lifting ring with the lifting hoist so that the flange surface of the shaft-launching shaft fits with the flange surface of the rotor; tighten the bolts to connect the flange of the shaft-launching shaft with the flange of the rotor.

[0025] As a further solution of the present invention: lubricating oil is applied to the inner diameter of the sleeve, the outer diameter of the tooling shaft and the inside of the tray.

[0026] As a further solution of the present invention: Step S5 further includes:

[0027] S552: A thrust block is installed on the tooling shaft. The thrust block is respectively equipped with a hydraulic oil top and a lifting ring. The hydraulic oil top applies a supporting force to the sleeve. The lifting ring is connected to a heavy hoist. The lifting hoist pulls the lifting ring so that the flange surface of the shaft is fitted with the flange surface of the rotor.

[0028] As a further solution of the present invention, step S5 further includes: providing a box around the flange in the middle of the shaft generator shaft, the box containing dry ice; and removing the box before the flange in the middle of the shaft generator shaft enters the shaft generator body.

[0029] As a further solution of the present invention: the box is composed of two halves, the top of the box is provided with a dry ice injection port and a lid, the box and the middle flange of the shaft, the box body, and the lid and the box body are connected by fasteners; the contact portion between the box and the shaft is provided with a rubber gasket.

[0030] Beneficial effects of the present invention:

[0031] A method for assembling a large-scale through-shaft permanent magnet shaft-belt generator has significant advantages and beneficial effects in terms of operational convenience and assembly stability through innovative designs such as horizontal assembly on the ground, fixing the main body, using a tooling shaft to balance the center of gravity, and sleeve guidance. It provides a more efficient, reliable, and safe solution for the assembly of large-scale through-shaft permanent magnet shaft-belt generators.

[0032] Assemble the shaft generator shaft and the shaft generator body horizontally on the ground, fix the shaft generator body, and move the shaft generator shaft to insert it into the inner hole of the shaft generator body; the operator can directly perform preliminary alignment and multiple adjustments on the ground, which reduces the complexity and difficulty of the operation and improves the assembly efficiency;

[0033] The use of the tooling shaft can balance the center of gravity of the shaft generator shaft, so that the shaft generator shaft always maintains a stable state during the insertion process, preventing it from suddenly tipping over during the assembly process, reducing the error caused by the unstable center of gravity, and can also extend the lifting length of the shaft, facilitating the stage conversion during lifting, thereby ensuring the connection quality between the shaft generator shaft and the shaft generator body;

[0034] The sleeve is coaxially arranged with the shaft, and acts as a key guiding component during the assembly process, providing a clear axial direction reference for the shaft, ensuring that the shaft can move along the predetermined and accurate axial trajectory during the insertion operation, effectively guaranteeing the assembly accuracy and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The figure is a flow chart of an assembly method of a large-scale through-shaft permanent magnet shaft generator;

[0036] Figure 2 Schematic diagram of the side structure of the shaft generator body;

[0037] Figure 3 This is a schematic diagram of the front structure of the shaft generator body;

[0038] Figure 4 The schematic diagram of the structure of the shaft-to-shaft is shown;

[0039] Figure 5 It is a schematic diagram of the front structure of the supporting device;

[0040] Figure 6 It is a schematic diagram of the top structure of the supporting device;

[0041] Figure 7 It is a schematic diagram of the side structure of the supporting device;

[0042] Figure 8 This is a schematic diagram of the front structure after executing step S1;

[0043] Figure 9 This is a schematic diagram of the side structure after executing step S1;

[0044] Figure 10 This is a schematic diagram of the front structure of the tooling shaft;

[0045] Figure 11 It is a schematic diagram of the side structure of the tooling shaft;

[0046] Figure 12 This is a schematic diagram of the front structure after executing step S2;

[0047] Figure 13 Schematic diagram of sleeve installation;

[0048] Figure 14This is a schematic diagram of the front structure after executing step S3;

[0049] Figure 15 This is a schematic diagram of the side structure after executing step S3;

[0050] Figure 16 The figure is a schematic diagram of the S4 process of an assembly method of a large-scale through-shaft permanent magnet shaft generator;

[0051] Figure 17 This is a schematic diagram of the front structure after executing step S410;

[0052] Figure 18 This is a schematic diagram of the front structure after executing step S420;

[0053] Figure 19 The figure is a schematic diagram of the S5 process of an assembly method of a large-scale through-shaft permanent magnet shaft generator;

[0054] Figure 20 This is a schematic diagram of the front structure after executing step S510;

[0055] Figure 21 This is a schematic diagram of the front structure after executing step S520;

[0056] Figure 22 This is a schematic diagram of the front structure of the pallet;

[0057] Figure 23 Schematic diagram of the side structure of the pallet;

[0058] Figure 24 This is a schematic diagram of the front structure after executing step S530;

[0059] Figure 25 This is a schematic diagram of the front structure after executing step S540;

[0060] Figure 26 This is a schematic diagram of the front structure after executing step S550;

[0061] Figure 27 It is a side structural diagram after executing step S550;

[0062] Figure 28 This is a schematic diagram of the front structure after executing step S552;

[0063] Figure 29 This is a schematic diagram of the thrust structure;

[0064] Figure 30 This is a schematic diagram of the box installation structure;

[0065] Figure 31 A schematic diagram of the side structure of the box.

[0066] As shown in the figure:

[0067] 1-generator shaft, 101-entry end flange, 102-middle flange, 2-generator body, 3-tooling shaft, 4-sleeve;

[0068] 5-support device, 501-steel plate, 502-I-steel, 503-pad;

[0069] 6-Jacking bolt, 7-Lifting strap, 8-Force gauge, 9-Lifting hoist, 10-Pallet, 11-Spindle crowbar, 12-Lifting ring, 13-Thrust block, 14-Hydraulic oil top, 15-Box, 1501-Dry ice injection port. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. It should be understood that this application is not limited to the example embodiments disclosed herein. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0071] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0072] 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 the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0073] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0074] like Figure 1 As shown, a method for assembling a large-scale shaft-through permanent magnet shaft generator includes a shaft generator shaft 1 and a shaft generator body 2, wherein the shaft generator body 2 includes a rotor and a stator. The steps include:

[0075] S1: Lay the support device 5 on the flat ground and place the shaft generator body 2 on the support device 5;

[0076] S2: Process a section of tooling shaft 3 according to the size of the flange 101 at the insertion end of the shaft-launching shaft 1, and connect the tooling shaft 3 to the insertion end of the shaft-launching shaft 1 with bolts;

[0077] S3: Process the sleeve 4 according to the outer diameter of the tooling shaft 3. The inner diameter of the sleeve 4 is clearance-matched with the outer diameter of the tooling shaft 3. Adjust the inner hole of the sleeve 4 and the inner hole of the shaft generator body 2 to be coaxial. Fix the sleeve 4 to one end of the support device 5.

[0078] S4: Insert the generator shaft 1 connected to the tooling shaft 3 into the inner hole of the generator body 2 until the tooling shaft 3 enters the sleeve 4;

[0079] S5: Continue to move the shaft generator shaft 1 toward the shaft generator body 2. When the flange surface of the shaft generator shaft 1 is in contact with the flange surface of the rotor, bolts are used to connect the flange of the shaft generator shaft 1 and the flange of the rotor.

[0080] S6: Remove the tooling shaft 3 and complete the assembly.

[0081] Specifically, if Figure 2-4 As shown, a large-scale, through-shaft permanent magnet shaft-driven generator comprises a generator shaft 1 and a generator body 2, which includes a rotor and a stator. The generator shaft 1 and generator body 2 are assembled horizontally on the ground. The generator body 2 is fixed, and the generator shaft 1 is inserted into the inner hole of the generator body 2. Operators can perform preliminary alignment and multiple adjustments directly on the ground, reducing operational complexity and difficulty and improving assembly efficiency.

[0082] The use of the tooling shaft 3 can balance the center of gravity of the shaft generator shaft 1, so that the shaft generator shaft 1 always maintains a stable state during the insertion process, prevents the shaft generator shaft 1 from suddenly tipping over during the assembly process, reduces the error caused by unstable center of gravity, and can also extend the lifting length of the shaft, facilitate stage conversion during lifting, thereby ensuring the connection quality between the shaft generator shaft 1 and the shaft generator body 2.

[0083] The sleeve 4 is coaxially arranged with the shaft-launching shaft 1. The sleeve 4 acts as a key guiding component during the assembly process, providing a clear axial direction reference for the shaft-launching shaft 1, ensuring that the shaft-launching shaft 1 can move along the established and accurate axial trajectory during the insertion operation, effectively ensuring the assembly accuracy and quality.

[0084] A method for assembling a large-scale through-shaft permanent magnet shaft-belt generator has significant advantages and beneficial effects in terms of operational convenience and assembly stability through innovative designs such as horizontal ground assembly, fixing the main body, using a tooling shaft 3 to balance the center of gravity, and a sleeve 4 for guidance. It provides a more efficient, reliable, and safe solution for the assembly of large-scale through-shaft permanent magnet shaft-belt generators.

[0085] In this embodiment, if Figure 5-9 As shown, the supporting device 5 includes a steel plate 501, an I-beam 502 and a pad 503. The steel plate 501 is laid on the ground, and the I-beam 502 is welded and fixed at both ends of the steel plate 501. The pads 503 are welded on the I-beam 502 at intervals. The position of the pad 503 avoids the part of the generator body that needs to be processed. The pad 503 is provided with a through hole, which matches the position of the jacking bolt hole at the bottom of the generator body.

[0086] Specifically, the shaft launcher is heavy, has a high center of gravity, and requires high assembly precision. In order to ensure the safety and stability of the shaft assembly process, it is necessary to lay a layer of steel plate 501 on the flat ground to optimize the levelness of the ground and disperse the force. Two I-beams 502 are placed on the steel plate 501 and fixed by spot welding. Eight pads 503 are welded on the I-beams 502. The position of the pads 503 should avoid the position on the bottom of the shaft launcher shaft 1 that needs to be polished and matched. The position of the pads 503 must include the position of the jacking bolt hole at the bottom of the equipment. The holes in the pads 503 are used to accommodate the jacking bolts 6 that are fully screwed into the bolt holes.

[0087] In this embodiment, step S1 also includes: using a crane to place the shaft generator body 2 on the supporting device 5, aligning the lifting bolt 6 holes at the bottom of the shaft generator body 2 with the through holes of the cushion block 503, and using the lifting bolt 6 to connect the shaft generator body 2 to the cushion block 503.

[0088] Specifically, if Figure 8 and 9As shown, when the shaft generator body 2 arrives and is unloaded from the truck, a crane is used to place the shaft generator body onto the I-beam 502. When placing the shaft generator body, ensure that the holes for the jacking bolts 6 are aligned and screwed in. If the jacking bolts 6 fit into the holes in the I-beam 502, the shaft generator body 2 is properly placed.

[0089] In this embodiment, step S2 further includes: a gasket is provided on the contact surface between the shaft-launching shaft 1 and the tooling shaft 3 .

[0090] Specifically, if Figure 10-12 As shown, a section of tooling shaft 3 is machined to the dimensions of flange 101 at the insertion end of the rotor shaft 1 and bolted to the insertion end. During installation, be sure to place a high-pressure cardboard gasket on the mating surface of the rotor shaft 1 to prevent damage. The angles of the threaded holes and flange holes must be carefully considered, ensuring that when the shaft and rotor flange are aligned, the threaded holes are directly above, below, left, and right.

[0091] In this embodiment, step S3 further includes: using a laser alignment instrument to adjust the inner hole of the sleeve 4 and the inner hole of the shaft generator body 2 to a coaxial state; fixing the sleeve 4 on the support device 5 with bolts, and then welding the sleeve 4 to the support device 5.

[0092] Specifically, if Figure 13-15 As shown, a positioning sleeve 4 is installed on the I-beam 502. The inner diameter of the sleeve 4 is precisely aligned with the outer diameter of the fixture shaft 3. A laser alignment instrument is used to adjust the position of the sleeve 4 so that it is coaxial with the inner bore of the shaft. The sleeve 4 fixture is adjusted and secured with various jacking and tightening bolts. After the sleeve 4 is adjusted and secured, the jacking and tightening bolts are spot welded to prevent loosening.

[0093] In this embodiment, if Figure 16 As shown, step S4 also includes:

[0094] S410: Both sides of the shaft 1 are connected to a lifting device; the lifting device includes a lifting belt 7, a tension meter 8 and a lifting hoist 9. The lifting belt 7 is connected to the tension meter 8, and the tension meter 8 is connected to the lifting hoist 9;

[0095] S420: After lifting, observe the parameters of the dynamometer 8 and adjust the shaft 1 to a horizontal level through the hoist 9; when the guide cone surfaces of the tooling shaft 3 and the sleeve 4 are in contact, observe the reading of the dynamometer 8 to assist in adjusting the position and angle of the shaft so that the tooling shaft 3 passes through the sleeve 4.

[0096] Specifically, if Figure 17 and 18 As shown, a lifting device is used to slowly move the shaft 1 through the inner hole of the generator body.

[0097] In this embodiment, if Figure 19 As shown, step S5 further includes:

[0098] S510: Remove the lifting device near the shaft generator body 2, connect the lifting device to the tooling shaft 3, lift the tooling shaft 3, and continue to move the shaft generator shaft 1 toward the shaft generator body 2;

[0099] S520: When the flange surface of the shaft generator shaft 1 is close to the flange surface of the rotor, the tray 10 is connected to the side close to the shaft generator body 2, and the tray 10 is lifted by the hoist 9;

[0100] S530: Tighten the hoist 9 of the pallet 10. When the pallet 10 is stressed, remove the lifting device.

[0101] S540: Install a shaft crowbar 11 on the tooling shaft 3 and use the shaft crowbar 11 to rotate the tooling shaft 3 so that the mounting hole of the shaft-generating shaft 1 is aligned with the flange hole of the rotor; and insert a bolt through the mounting hole and the flange hole.

[0102] S551: Reconnect the lifting devices to both sides of the shaft-generating shaft 1, remove the pallet 10 and the shaft crowbar 11, install the lifting ring 12 on the tooling shaft 3, and connect the lifting ring 12 to the hoist 9. The hoist 9 pulls the lifting ring 12 so that the flange surface of the shaft-generating shaft 1 is aligned with the flange surface of the rotor.

[0103] S552: Install a thrust block 13 on the fixture shaft 3. The thrust block 13 is equipped with a hydraulic oil jack 14 and a lifting ring 12. The hydraulic oil jack 14 applies a supporting force to the sleeve 4. The lifting ring 12 is connected to a heavy hoist. The hoist 9 pulls the lifting ring 12, so that the flange surface of the shaft 1 is in contact with the flange surface of the rotor.

[0104] S553: Tighten the bolts to connect the flange of the shaft 1 to the flange of the rotor.

[0105] Specifically, if Figure 20-29 As shown, from the end of the tooling shaft 3, use the rotating shaft crowbar 11 to align the hole positions of the flange of the shaft-generating shaft 1 and the flange of the rotor, and continue to slowly push the shaft-generating shaft 1 through the inner hole of the generator body; when the rotor and the shaft-generating shaft 1 are too tight, use the hydraulic oil pusher 14 to support the sleeve 4, and then pull the shaft-generating shaft 1 from the end of the tooling shaft 3 until the flange surface of the shaft-generating shaft 1 fits with the flange surface of the rotor, and tighten the bolts.

[0106] In this embodiment, lubricating oil is applied to the inner diameter of the sleeve 4 , the outer diameter of the tooling shaft 3 and the inside of the tray 10 .

[0107] Specifically, the lubricating oil can form an effective lubricating film on the contact surface between the tooling shaft 3 or the shaft-launching shaft 1 and related components, significantly reducing frictional resistance, enabling the tooling shaft 3 or the shaft-launching shaft 1 to move smoothly during movement, while avoiding collisions between components due to direct contact.

[0108] In this embodiment, step S5 further includes: installing a box 15 around the flange 102 in the middle of the generator shaft 1, containing dry ice; and removing the box 15 before the middle flange of the generator shaft 1 enters the generator body 2. Box 15 consists of two halves, with a dry ice injection port 1501 and a lid located on the top. Fasteners connect the box 15 to the middle flange of the generator shaft 1, the box body, and the lid to the box body. A rubber gasket is installed at the contact area between the box 15 and the generator shaft 1.

[0109] Specifically, if Figure 30-31 As shown, dry ice is used to freeze the middle flange of the launch shaft 1, reducing its size to facilitate smooth threading. After the dry ice is removed, the freezing effect diminishes over time, so the time between the release of dry ice from the middle flange of the launch shaft 1 and the completion of threading should be minimized. Box 15 consists of two halves, making it easy to disassemble. To facilitate assembly and disassembly without affecting lifting, box 15 is pre-installed and filled with dry ice. The dry ice continues to freeze the middle flange of the shaft during threading. When box 15 is about to enter the launch body, it is removed and the dry ice is released again. A layer of rubber is placed at each contact point between box 15 and the launch shaft 1 to prevent wear on the launch shaft 1 and provide a seal.

[0110] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0111] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for assembling a large-scale shaft-through permanent magnet shaft generator, characterized in that: The invention comprises a shaft generator shaft and a shaft generator body, wherein the shaft generator body comprises a rotor and a stator, and the steps include: S1: Laying a support device on flat ground, and placing the shaft generator body on the support device; S2: machining a tooling shaft according to the flange size of the insertion end of the shaft-launching shaft, and connecting the tooling shaft to the insertion end of the shaft-launching shaft by bolts; S3: Processing a sleeve according to the outer diameter of the tooling shaft, with the inner diameter of the sleeve being clearance-matched with the outer diameter of the tooling shaft, adjusting the inner hole of the sleeve and the inner hole of the shaft generator body to be coaxial, and fixing the sleeve to one end of the support device; S4: inserting the shaft generator shaft connected to the tooling shaft into the inner hole of the shaft generator body until the tooling shaft enters the sleeve; S5: Continue to move the generator shaft toward the generator body, and when the flange surface of the generator shaft is in contact with the flange surface of the rotor, connect the flange of the generator shaft and the flange of the rotor with bolts; S6: Remove the tooling shaft to complete the assembly.

2. The assembly method of a large-scale shaft-through permanent magnet shaft generator according to claim 1, characterized in that: The support device includes a steel plate, an I-beam, and a pad. The steel plate is laid on the ground, and the I-beam is welded and fixed at both ends of the steel plate. The pads are welded to the I-beam at intervals. The pads are positioned to avoid the parts of the generator body that need to be processed. The pads are provided with through holes that match the positions of the jacking bolt holes at the bottom of the generator body. The step S1 further includes: placing the shaft generator body on the supporting device by using a crane, aligning the jacking bolt holes at the bottom of the shaft generator body with the through holes of the cushion block, and connecting the shaft generator body to the cushion block by using jacking bolts.

3. The assembly method of a large-scale shaft-through permanent magnet shaft generator according to claim 1, characterized in that: The step S2 further includes: providing a gasket on the contact surface between the shaft-launching shaft and the tooling shaft.

4. The assembly method of a large-scale shaft-through permanent magnet shaft generator according to claim 1, characterized in that: The step S3 further includes: using a laser alignment instrument to adjust the inner hole of the sleeve and the inner hole of the shaft generator body to a coaxial state; fixing the sleeve to the support device with bolts, and then welding the sleeve to the support device.

5. The assembly method of a large-scale shaft-through permanent magnet shaft generator according to claim 1, characterized in that: The step S4 further includes: S410: Connecting both sides of the shaft to a lifting device; the lifting device includes a lifting belt, a dynamometer, and a hoist; the lifting belt is connected to the dynamometer, and the dynamometer is connected to the hoist; S420: After lifting, observe the parameters of the dynamometer and adjust the shaft to a horizontal position through the hoist; when the tooling shaft contacts the guide cone surface of the sleeve, observe the dynamometer reading to assist in adjusting the position and angle of the shaft so that the tooling shaft passes through the sleeve.

6. The assembly method of a large-scale shaft-through permanent magnet shaft generator according to claim 5, characterized in that: The step S5 further includes: S510: dismantling the hoisting device close to the shaft generator body, connecting the hoisting device to the tooling shaft, lifting the tooling shaft, and continuing to move the shaft generator shaft toward the shaft generator body; S520: When the flange surface of the shaft generator shaft is close to the flange surface of the rotor, a tray is connected to the side close to the shaft generator body, and the tray is lifted by a hoist; S530: tighten the hoist of the pallet, and when the pallet is stressed, dismantle the lifting device; S540: Installing a rotating shaft crowbar on the tooling shaft, rotating the tooling shaft with the rotating shaft crowbar so that the mounting hole of the shaft-generating shaft is aligned with the flange hole of the rotor; passing a bolt through the mounting hole and the flange hole; S550: Connect the lifting devices again on both sides of the shaft-launching shaft, remove the pallet and the shaft crowbar, install a lifting ring on the tooling shaft, and connect the lifting ring to a lifting hoist; pull the lifting ring with the lifting hoist so that the flange surface of the shaft-launching shaft fits with the flange surface of the rotor; tighten the bolts to connect the flange of the shaft-launching shaft with the flange of the rotor.

7. The assembly method of a large-scale shaft-through permanent magnet shaft generator according to claim 6, characterized in that: Apply lubricant to the inside diameter of the sleeve, the outside diameter of the tooling shaft, and the inside of the pallet.

8. The method for assembling a large-scale shaft-penetrating permanent magnet shaft generator according to claim 6, characterized in that: The step S5 further includes: S552: A thrust block is installed on the tooling shaft. The thrust block is respectively equipped with a hydraulic oil top and a lifting ring. The hydraulic oil top applies a supporting force to the sleeve. The lifting ring is connected to a heavy hoist. The lifting hoist pulls the lifting ring so that the flange surface of the shaft is fitted with the flange surface of the rotor.

9. The assembly method of a large-scale shaft-through permanent magnet shaft generator according to claim 1, characterized in that: The step S5 further includes: providing a box around the flange in the middle of the shaft generator shaft, the box containing dry ice; and removing the box before the flange in the middle of the shaft generator shaft enters the shaft generator body.

10. The assembly method of a large-scale shaft-through permanent magnet shaft generator according to claim 9, characterized in that: The box is composed of two halves, with a dry ice injection port and a lid provided on the top of the box. The box and the middle flange of the shaft, the box body, and the lid and the box body are connected by fasteners; a rubber gasket is provided at the contact portion between the box and the shaft.

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