Installation method of a shaft-mounted shaft generator for an ultra-large container ship

Abstract

The present invention discloses a mounting method for a shaft-mounted generator with a holding shaft for a super-large container ship, comprising the following steps: (1) Hoist the shaft-mounted generator with a holding shaft and place it on the auxiliary machine platform; (2) Hoist the rotor shaft with the annular intermediate flange installed into the engine room; (3) Pass the rotor shaft through the shaft-mounted generator with a holding shaft towards the bow direction; (4) Hoist the rotor shaft, then separate the upper and lower parts of the two intermediate bearings and place the lower part on the corresponding trolley; (5) Transport the intermediate bearings to the positions of the corresponding intermediate bearing platforms respectively, and remove the trolleys; Lower and move forward the rotor shaft; (6) Adjust the position of the annular intermediate flange; (7) After the rotor shaft is in place, lower it so that the rotor shaft is supported by the intermediate bearings; (8) Connect the outside of the annular intermediate flange to the shaft generator rotor through hydraulic bolts to complete the installation of the shaft-mounted generator with a holding shaft. The present invention can achieve the safe, efficient and economical installation of the shaft generator rotor and the rotor shaft, and ensure the normal operation of the shaft-mounted generator with a holding shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and particularly relates to an installation method for a shaft-mounted generator with a shaft-holding type on an ultra-large container ship. Background Art

[0002] With the development of technology, people's activities have continuously expanded from land to the ocean, and global trade activities have become increasingly frequent. Ships, especially ultra-large container ships, undertake the transportation tasks between continents and countries. However, due to their large cargo capacity and high speed, ultra-large container ships consume a large amount of fuel during navigation. The application of shaft generators can greatly improve the economic efficiency of ship navigation. However, as the installed power of shaft generators gradually increases, the current maximum power has reached about 4.6 MW, which has led to a significant increase in the external dimensions and weight of shaft generators, bringing very adverse effects to the installation of shaft generators.

[0003] Currently, the installation method of shaft generators in the industry is as follows: After connecting the rotor shaft and the shaft generator in the workshop or at the dock, the whole is lifted into the predetermined position in the engine room through the hull opening, and finally fixed by bolts. However, this installation method is only applicable to small shaft generators. For ultra-large shaft generators configured for ultra-large container ships, there will be the following defects: Currently, the maximum power of shaft generators has reached about 4.6 MW, and the weight is about 70 tons. The designed rotor shaft is also very long and heavy, resulting in very long dimensions and heavy weight if directly lifted, with extremely high installation difficulty, large workload, long duration, and lack of safety guarantee. Therefore, the above problems need to be solved urgently. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an installation method for a shaft-mounted generator with a shaft-holding type on an ultra-large container ship, which can achieve safe, efficient, and economic installation of the shaft generator rotor and the rotor shaft, and ensure the normal operation of the shaft-mounted generator with a shaft-holding type.

[0005] To solve the above technical problem, the present invention adopts the following technical solutions: An installation method for a shaft-mounted generator with a shaft-holding type on an ultra-large container ship according to the present invention is characterized by including the following steps:

[0006] (1) Lift the shaft-mounted generator with a shaft-holding type into the engine room and place it on the auxiliary machine platform;

[0007] (2) Use a crane to lift the rotor shaft with a ring-shaped intermediate flange installed into the predetermined position in the engine room shaft chamber;

[0008] In the above steps, the specific process of installing the ring-shaped intermediate flange is as follows:

[0009] (2.1) When stored, the rotor shaft is horizontally placed by four wooden supports. Then, first remove the corresponding wooden support on the side where the annular intermediate flange sleeve is to be inserted.

[0010] (2.2) Use a crane to lift the rotor shaft, and add support blocks directly below each wooden support of the rotor shaft to increase the insertion space for the annular intermediate flange. Then, horizontally place the rotor shaft on the wooden supports with increased height, and ensure that the center of gravity of the rotor shaft is between the two middle wooden supports.

[0011] (2.3) Clean the contact surfaces corresponding to the installation part of the rotor shaft and the first bolt holes, and install guide pins in four of the first bolt holes.

[0012] (2.4) Use a crane to lift the annular intermediate flange and insert it from one end of the rotor shaft, and move it towards its installation position. Use the positioning function of the guide pins to accurately install the annular intermediate flange at the corresponding position on the rotor shaft.

[0013] (2.5) Reset the previously removed wooden supports and add support blocks of the same height below them.

[0014] (2.6) Connect the inner side of the annular intermediate flange to the rotor shaft through precision bolts.

[0015] (3) Then horizontally move the rotor shaft towards the bow direction. After the bow of the rotor shaft passes through the bearing type shaft generator, use the 4# and 6# pulleys above to lift the rotor shaft and continue to move it to the installation position of the intermediate bearing.

[0016] (4) Lift the rotor shaft through the 4# and 6# pulleys, then remove the 2# and 3# trolleys. Then separate the upper and lower parts of the two intermediate bearings, and place their lower parts on the corresponding 2# and 3# trolleys respectively.

[0017] (5) After removing the upper parts of the two intermediate bearings, transport them to the corresponding intermediate bearing platform positions respectively, and then support the intermediate bearings with support bolts. Remove the 2# and 3# trolleys. Then lower the rotor shaft and move it forward to the installation position of its shaft generator rotor of the bearing type shaft generator.

[0018] (6) Adjust the position of the annular intermediate flange to ensure that the marked position of the annular intermediate flange corresponds to the shaft generator rotor.

[0019] (7) After the rotor shaft is in place in the front-back and up-down directions, adjust the intermediate bearing to make the intermediate bearing contact the rotor shaft. Then lower the 4# and 6# pulley hoists so that the rotor shaft is supported by the intermediate bearing, and then close the upper and lower parts of the intermediate bearing.

[0020] (8) Connect the outer side of the annular intermediate flange to the shaft generator rotor through hydraulic bolts, thus completing the installation of the bearing type shaft generator.

[0021] Preferably, in the above step (2.3), a clearance of 0.06 - 0.08 mm should be ensured between the guide pin and the corresponding bolt hole.

[0022] Preferably, in the above step (2.4), an adjusting chain block is provided at the lifting point for lifting the annular intermediate flange. After adjusting the corresponding TOP position through the chain block, the annular intermediate flange is installed at the corresponding position of the rotor shaft through the guide pin.

[0023] Preferably, the annular intermediate flange is of an annular structure, and several first mounting holes are vertically and evenly spaced and embedded through along the circumferential direction thereof at the position relative to the connection position with the rotor shaft on its inner side. Each of the first mounting holes matches the first bolt hole on the rotor shaft respectively, and their setting positions correspond to the setting positions of the first bolt holes on the rotor shaft respectively. Then, through the cooperation of the first mounting holes, the first bolt holes and the precision bolts, the annular intermediate flange is screwed and fixed to the rotor shaft.

[0024] Preferably, several second mounting holes are vertically and evenly spaced and embedded through along the circumferential direction thereof at the position relative to the connection position with the shaft generator rotor of the bearing type shaft generator on the outer side of the annular intermediate flange. Each of the second mounting holes matches the second bolt hole on the shaft generator rotor respectively, and their setting positions correspond to the setting positions of the second bolt holes on the shaft generator rotor respectively. Then, through the cooperation of the second mounting holes, the second bolt holes and the hydraulic bolts, the annular intermediate flange is screwed and fixed to the shaft generator rotor of the bearing type shaft generator.

[0025] Preferably, four arc-shaped grooves are vertically and evenly spaced and embedded along the circumferential direction in the annular area between the first mounting holes and the second mounting holes on the annular intermediate flange. Each of the arc-shaped grooves is spaced from the corresponding first mounting hole and the second mounting hole respectively, and does not affect the strength of the annular intermediate flange respectively. Then, the weight of the annular intermediate flange is reduced through the arc-shaped grooves.

[0026] Preferably, in the above step (3), during the process of moving the rotor shaft, the No. 1 trolley below the rotor shaft is moved out towards the stern, the No. 2 trolley is moved to the rear side of the annular intermediate flange, then the rotor shaft is lowered and supported by the No. 2 trolley and the No. 3 trolley, and then the rotor shaft is continuously moved to the intermediate bearing installation position.

[0027] Preferably, in the above step (4), a clearance of 20 mm should be maintained between the rotor shaft and the shaft generator rotor of the bearing type shaft generator, and the distance between the flange of the intermediate bearing and the track should be measured during this period to ensure the smooth installation of the intermediate bearing; if the distance is too small, the position of the bearing type generator should be adjusted upward.

[0028] Preferably, in the above step (6), attention should be paid to the alignment between the annular intermediate flange and the shaft generator rotor, and a hoist should be used for adjustment; during the shaft penetration process, non-metallic protective equipment should be used to protect the stator coil, and the internal operators should wear protective clothing.

[0029] Advantages of the present invention:

[0030] (1) The present invention can achieve the safe, efficient, and economical installation of the shaft generator rotor and the rotor shaft, ensuring the normal operation of the bearing-type shaft-driven generator;

[0031] (2) The present invention can avoid directly hoisting the large-sized and heavy-bearing type shaft-driven generator, thereby reducing the working difficulty, reducing the workload, improving the construction efficiency, and having high construction safety;

[0032] (3) The installation of the bearing-type shaft-driven generator realized by the present invention can avoid moving the large-sized and heavy-bearing type shaft-driven generator in the limited space of the engine room, thereby reducing the working difficulty, reducing the workload, improving the construction efficiency, and having high construction safety. Description of the drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic connection diagram of the bearing-type shaft-driven generator and the rotor shaft of the present invention.

[0035] Figure 2 It is a schematic structural diagram of the annular intermediate flange of the present invention.

[0036] Figure 3 It is a schematic installation diagram of the rotor shaft and the annular intermediate flange of the present invention.

[0037] Figure 4 It is a schematic diagram of the rotor shaft penetrating into the bearing-type shaft-driven generator of the present invention.

[0038] Figure 5 It is a schematic diagram of the rotor shaft supported by a trolley of the present invention.

[0039] Figure 6 It is a schematic diagram of the intermediate bearing placed on the trolley of the present invention.

[0040] Figure 7 It is a schematic installation diagram of the rotor shaft and the intermediate bearing of the present invention.

[0041] Figure 8This is a schematic installation diagram of the bearing-mounted shaft generator and the rotor shaft of the present invention.

[0042] Among them, 1 - bearing-mounted shaft generator; 2 - shaft generator rotor; 3 - rotor shaft; 4 - annular intermediate flange; 5 - hydraulic bolt; 6 - precision bolt; 7 - wooden support; 8 - support block; 9 - intermediate bearing. Specific implementation manner

[0043] The technical solution of the present invention will be clearly and completely described below through specific implementation manners.

[0044] An installation method of a bearing-mounted shaft generator for an ultra-large container ship of the present invention, as Figures 1 to 8 shown, includes the following steps:

[0045] (1) Lift the bearing-mounted shaft generator 1 into the engine room and place it on a predetermined auxiliary machine platform.

[0046] (2) Lift the rotor shaft 3 with the annular intermediate flange 4 installed into the predetermined position in the engine room shaft chamber by a crane;

[0047] In the above steps, the specific process of installing the annular intermediate flange 4 is as follows:

[0048] (2.1) When the rotor shaft 3 is stored, it is horizontally placed by four wooden supports 7. Then, first remove the corresponding wooden support 7 on the side where the annular intermediate flange 4 is to be sleeved.

[0049] (2.2) Lift the rotor shaft 3 by a crane, and add support blocks 8 directly below each wooden support 7 of the rotor shaft 3, thereby increasing the sleeving space of the annular intermediate flange 4. Then, horizontally place the rotor shaft 3 on the wooden supports 7 with increased height, and ensure that the center of gravity of the rotor shaft 3 is between the middle two wooden supports 7.

[0050] (2.3) Clean the contact surface corresponding to the installation part of the rotor shaft 3 and the first bolt holes, and install guide pins in four of the first bolt holes;

[0051] Among them, it should be ensured that there is a gap of 0.06 - 0.08 mm between the guide pin and the corresponding bolt hole.

[0052] (2.4) After lifting the annular intermediate flange 4 by a crane, sleeve it into one end of the rotor shaft 3 and move it towards its installation position. Use the positioning function of the guide pin to accurately install the annular intermediate flange 4 at the corresponding position of the rotor shaft 3;

[0053] Among them, an adjusting chain hoist can be set at the lifting point for lifting the annular intermediate flange 4. After adjusting the corresponding TOP position through the chain hoist, then install the annular intermediate flange 4 at the corresponding position of the rotor shaft 3 through the guide pin.

[0054] The annular intermediate flange 4 of the present invention is a circular ring structure, and several first mounting holes are vertically and evenly spaced along its circumferential direction and are vertically embedded and penetrated inside it relative to the connection position with the rotor shaft 3. As Figure 1 , Figure 2 shown, each first mounting hole respectively matches the first bolt hole on the rotor shaft 3, and its setting position respectively corresponds to the setting position of the first bolt hole on the rotor shaft 3. Furthermore, through the cooperation of the first mounting hole, the first bolt hole and the precision bolt 6, the annular intermediate flange 4 is screwed and fixed to the rotor shaft 3.

[0055] As Figure 1 , Figure 2 shown, several second mounting holes are vertically and evenly spaced along the circumferential direction and are vertically embedded and penetrated outside the annular intermediate flange 4 relative to the connection position with the shaft generator rotor 2 of the bearing type shaft generator 1. Each second mounting hole respectively matches the second bolt hole on the shaft generator rotor 2, and its setting position respectively corresponds to the setting position of the second bolt hole on the shaft generator rotor 2. Furthermore, through the cooperation of the second mounting hole, the second bolt hole and the hydraulic bolt 5, the annular intermediate flange 4 is screwed and fixed to the shaft generator rotor 2 of the bearing type shaft generator 1.

[0056] As Figure 1 , Figure 2 shown, four arc-shaped grooves are vertically and evenly spaced along the circumferential direction and are vertically embedded in the annular area of the annular intermediate flange 4 between the first mounting hole and the second mounting hole. Each arc-shaped groove is respectively arranged at an interval from the corresponding first mounting hole and the second mounting hole, and does not affect the strength of the annular intermediate flange 4 respectively. Furthermore, the weight of the annular intermediate flange 4 is reduced through the arc-shaped grooves.

[0057] (2.5) Reset the wooden support 7 that was moved before and add support blocks 8 with the same height below it;

[0058] (2.6) Connect the inner side of the annular intermediate flange 4 to the rotor shaft 3 through the precision bolt 6.

[0059] (3) Then horizontally move the rotor shaft 3 towards the bow direction. After the bow of the rotor shaft 3 penetrates the bearing type shaft generator 1, use the 4# pulley and 6# pulley above to lift the rotor shaft 3 and continue to move it to the installation position of the intermediate bearing 9;

[0060] In the above steps, during the process of moving the rotor shaft 3, move the 1# trolley below the rotor shaft 3 towards the stern, move the 2# trolley to the rear side of the annular intermediate flange 4, then lower the rotor shaft 3, support it by the 2# trolley and the 3# trolley, and then continue to move the rotor shaft 3 to the installation position of the intermediate bearing 9, that is Figure 5 the position shown.

[0061] (4) Lift the rotor shaft 3 by means of the 4# pulley and 6# pulley, then move out the 2# trolley and 3# trolley, separate the upper and lower parts of the two intermediate bearings 9, and place their lower parts on the corresponding 2# trolley and 3# trolley respectively.

[0062] In the above steps, as Figure 6 shown, a 20-mm gap needs to be maintained between the rotor shaft 3 and the shaft generator rotor 2 of the bearing-mounted shaft generator 1, and during this period, measure the distance between the flange of the intermediate bearing 9 and the track to ensure the smooth installation of the intermediate bearing 9; if the distance is too small, adjust the position of the bearing-mounted generator upward.

[0063] (5) After removing the upper parts of the two intermediate bearings 9, transport them to the corresponding intermediate bearing platform positions respectively, then support the intermediate bearings 9 with support bolts, and move out the 2# trolley and 3# trolley; then lower the rotor shaft 3 and move it forward to the installation position between it and the shaft generator rotor 2 of the bearing-mounted shaft generator 1, that is, Figure 7 the position shown.

[0064] (6) Adjust the position of the annular intermediate flange 4 to ensure that the marked position of the annular intermediate flange 4 corresponds to the shaft generator rotor 2.

[0065] In the above steps, attention needs to be paid to the alignment between the annular intermediate flange 4 and the shaft generator rotor 2, and use a hoist for adjustment; during the shaft-passing process, pay attention to protecting the stator coil with non-metallic protective appliances (such as cloth and blankets), and the personnel entering the interior need to wear protective clothing.

[0066] (7) As Figure 8 shown, after the rotor shaft 3 is in place in the front-back and up-down directions, adjust the intermediate bearing 9 so that the intermediate bearing 9 contacts the rotor shaft 3; then lower the 4# pulley and 6# pulley hoist, so that the rotor shaft 3 is supported by the intermediate bearing 9, and then close the upper and lower parts of the intermediate bearing 9.

[0067] (8) Connect the outside of the annular intermediate flange 4 to the shaft generator rotor 2 through the hydraulic bolts 5, thereby completing the installation of the bearing-mounted shaft generator 1; among them, the use of hydraulic bolts 5 facilitates later disassembly.

[0068] Advantages of the present invention:

[0069] (1) The present invention can achieve the safe, efficient and economical installation of the shaft generator rotor 2 and the rotor shaft 3, ensuring the normal operation of the bearing-mounted shaft generator 1.

[0070] (2) The present invention can avoid directly hoisting the large-sized and heavy-bearing-mounted shaft generator 1, thereby reducing the working difficulty, reducing the workload, improving the construction efficiency, and having high construction safety.

[0071] (3) The installation of the bearing-mounted shaft generator 1 of the present invention can avoid moving the large-sized and heavy-bearing-mounted shaft generator 1 in the limited space of the engine room, thereby reducing the working difficulty, workload, improving the construction efficiency, and having high construction safety.

[0072] The above-described embodiments are only described as the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary engineering and technical personnel in the field to the technical solutions of the present invention should fall within the protection scope of the present invention. The technical content for which the present invention requests protection has been fully recorded in the claims.

Claims

1. Installation method of a hugging shaft type shaft generator for ultra-large container ships, characterized in that it includes the following steps: (1) Lift the hugging shaft type shaft generator into the engine room and place it on the auxiliary machine platform; (2) Use a crane to lift the rotor shaft with the annular intermediate flange installed into the predetermined position in the engine room shaft chamber; In the above steps, the specific process of installing the annular intermediate flange is as follows: (2.1) When the rotor shaft is stored, it is horizontally placed by four wooden supports. Then, first remove the corresponding wooden support on the side where the annular intermediate flange sleeve is to be inserted; (2.2) Use a crane to lift the rotor shaft, and add support blocks directly below each wooden support of the rotor shaft to increase the insertion space of the annular intermediate flange. Then, horizontally place the rotor shaft on the wooden supports with increased height, and ensure that the center of gravity of the rotor shaft is between the two middle wooden supports; (2.3) Clean the contact surfaces corresponding to the installation part of the rotor shaft and the first bolt holes, and install guide pins in four of the first bolt holes; (2.4) Use a crane to lift the annular intermediate flange and insert it from one end of the rotor shaft, and move it towards its installation position. Use the positioning function of the guide pins to accurately install the annular intermediate flange at the corresponding position of the rotor shaft; (2.5) Reset the previously removed wooden support and add support blocks with the same height below it; (2.6) Connect the inner side of the annular intermediate flange to the rotor shaft through precision bolts; (3) Then horizontally move the rotor shaft towards the bow direction. After the bow of the rotor shaft passes through the hugging shaft type shaft generator, use the 4# pulley and 6# pulley above to lift the rotor shaft and continue to move it to the intermediate bearing installation position; (4) Use the 4# pulley and 6# pulley to lift the rotor shaft, then move out the 2# trolley and 3# trolley. Then, separate the upper and lower parts of the two intermediate bearings, and place their lower parts on the corresponding 2# trolley and 3# trolley respectively; (5) After moving the upper parts of the two intermediate bearings away, transport them to the corresponding intermediate bearing platform positions respectively. Then, support the intermediate bearings with support bolts and move out the 2# trolley and 3# trolley. Then, lower the rotor shaft and move it forward to its installation position with the shaft generator rotor of the hugging shaft type shaft generator; (6) Adjust the position of the annular intermediate flange to ensure that the marked position of the annular intermediate flange corresponds to the shaft generator rotor; (7) After the rotor shaft is in place in the front-back and up-down directions, adjust the intermediate bearings so that the intermediate bearings are in contact with the rotor shaft. Then, lower the 4# pulley and 6# pulley hoist, so that the rotor shaft is supported by the intermediate bearings, and then close the upper and lower parts of the intermediate bearings; (8) Connect the outer side of the annular intermediate flange to the shaft generator rotor through hydraulic bolts, thus completing the installation of the hugging shaft type shaft generator.

2. The installation method of a hugging shaft type shaft generator for ultra-large container ships according to claim 1, characterized in that: In the above step (2.3), it should be ensured that there is a gap of 0.06 - 0.08 mm between the guide pin and the corresponding bolt hole.

3. The installation method of a hugging shaft type shaft generator for ultra-large container ships according to claim 1, characterized in that: In the above step (2.4), an adjusting chain block is provided at the lifting point for lifting the annular intermediate flange. After adjusting the corresponding TOP position through the chain block, the annular intermediate flange is installed at the corresponding position of the rotor shaft through the guide pin.

4. A mounting method for a bearing-mounted shaft generator for ultra-large container ships according to claim 3, characterized in that: The annular intermediate flange is of an annular structure, and a plurality of first mounting holes are vertically and evenly spaced along its circumferential direction and penetrated and opened at positions on its inner side relative to the connection position with the rotor shaft. Each of the first mounting holes respectively matches the first bolt holes on the rotor shaft, and their setting positions respectively correspond to the setting positions of the first bolt holes on the rotor shaft. Then, through the cooperation of the first mounting holes, the first bolt holes and the precision bolts, the annular intermediate flange is screwed and fixed to the rotor shaft.

5. A mounting method for a bearing-mounted shaft generator for ultra-large container ships according to claim 4, characterized in that: On the outer side of the annular intermediate flange, a plurality of second mounting holes are vertically and evenly spaced along its circumferential direction and penetrated and opened at positions relative to the connection position with the shaft generator rotor of the bearing-mounted shaft generator. Each of the second mounting holes respectively matches the second bolt holes on the shaft generator rotor, and their setting positions respectively correspond to the setting positions of the second bolt holes on the shaft generator rotor. Then, through the cooperation of the second mounting holes, the second bolt holes and the hydraulic bolts, the annular intermediate flange is screwed and fixed to the shaft generator rotor of the bearing-mounted shaft generator.

6. A mounting method for a bearing-mounted shaft generator for ultra-large container ships according to claim 5, characterized in that: In the annular region of the annular intermediate flange between the first mounting holes and the second mounting holes, four arc-shaped grooves are vertically and evenly spaced along its circumferential direction and penetrated and opened. Each of the arc-shaped grooves is respectively arranged at intervals with the corresponding first mounting hole and the second mounting hole, and does not affect the strength of the annular intermediate flange respectively. Then, the weight of the annular intermediate flange is reduced through the arc-shaped grooves.

7. A mounting method for a bearing-mounted shaft generator for ultra-large container ships according to claim 1, characterized in that: In the above step (3), during the process of moving the rotor shaft, the No. 1 trolley below the rotor shaft is moved out towards the stern, the No. 2 trolley is moved to the rear side of the annular intermediate flange, and then the rotor shaft is lowered and supported by the No. 2 trolley and the No. 3 trolley. Then, the rotor shaft is continuously moved to the intermediate bearing installation position.

8. A mounting method for a bearing-mounted shaft generator for ultra-large container ships according to claim 1, characterized in that: In the above step (4), a 20-mm gap needs to be maintained between the rotor shaft and the shaft generator rotor of the bearing-mounted shaft generator, and the distance between the flange of the intermediate bearing and the track is measured during this period to ensure the smooth installation of the intermediate bearing. If the distance is too small, the position of the bearing-mounted generator is adjusted upward.

9. A mounting method for a bearing-mounted shaft generator for ultra-large container ships according to claim 1, characterized in that: In the above step (6), attention should be paid to the alignment between the annular intermediate flange and the shaft generator rotor, and a hoist should be used for adjustment; during the shaft passing process, attention should be paid to protecting the stator coil with non-metallic protective equipment, and the internal operators should wear protective clothing.

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