Cabin installation and installation method of shaft-mounted generator set based on large ships

Abstract

The present invention relates to a method for loading and installing a shaft-enclosed shaft-belt generator assembly based on a large ship, and belongs to the technical field of large ship construction. It includes a rotor shaft and rotor shaft coil assembly process, a shaft generator loading process, and an air gap adjustment process after underwater alignment; the rotor shaft and rotor shaft coil assembly process is arranged before the shaft generator loading process, and sequentially includes the assembly preparation work of the rotor shaft and the rotor shaft coil, the installation coil work of the rotor shaft, and the flipping and placing in position; the shaft generator loading process sequentially includes the stator box loading process, the rotor shaft transfer process, and the intermediate shaft loading process; the air gap adjustment process after underwater alignment is after the shaft generator loading process. The present invention has made a breakthrough in the loading and installation of a shaft-enclosed shaft-belt generator assembly on a large ship, and solves the problem of stability between the rotor coil and the stator box during the assembly of the shaft generator on a large ship.

Description

Technical Field

[0001] The invention relates to a cabin installation and installation method of a shaft-holding type shaft-belt generator assembly based on a large ship, and belongs to the technical field of large ship construction. Background Art

[0002] When it comes to shaft generators (abbreviated as shaft generators), the first thing that comes to mind is the integral shaft generator driven by a medium-speed engine through a gearbox. The (packaged by the manufacturer) is hoisted as a whole, and the installation is completed after aligning it with the gearbox. It is simple and direct. The shaft generator we applied for a patent is driven by a low-speed engine, and the rotor coil is attached to the shaft. It needs to be assembled in the shipyard. At present, it has not been actually installed on commercial ships, especially large ships. As the EEDI ship energy consumption index enters the PHASE3 stage, large ships use shaft generators to meet the energy consumption index and carbon standards at the same time, and consume less fuel. This is a way to reduce carbon emissions.

[0003] At present, there are cases of using shaft generators on small ships. Due to their small size and weight, there is no assembly required, and it is relatively convenient to enter the cabin as a whole, without any technical difficulties. However, they have not been installed and used on existing large ships. In order to adapt to the requirements of the new regulations, the installation of shaft-mounted shaft generators on large ships has certain challenges in terms of assembly, entry into the cabin and installation.

[0004] For example, a Chinese patent with the patent publication number CN216209299U discloses a universal test connection device for a marine shaft-mounted generator, which includes a universal bearing support and a main shaft; a bearing seat is installed on the top of the universal bearing support, a universal base is provided at the bottom of the universal bearing support, and a lifting pad slider is provided on the universal base body; the main shaft includes a shaft body, bearings are installed at both ends of the shaft body, the shaft body is installed on the bearing seat of the universal bearing support through the bearings at both ends, and at least two fixing flanges are provided on the shaft body between the bearings at both ends. The height of the lifting pad slider on the universal base of this patent is adjustable, so that the bearing support is universalized, which can facilitate the adjustment of the center height and center line of the shaft system.

[0005] However, the above patent still has problems with the rotor shaft being a "big belly" shaft in the middle. The root of a conventional rail trolley cannot meet the requirements for the rotor shaft to smoothly pass through the stator housing, because its coil will collide with the rail and damage the insulating paint on the surface of the coil. The rotor shaft is a shaft, and its center of gravity and length cannot completely ensure smooth passage through the stator housing. Before passing through the stator housing, the four axes of the shaft must have no other support, which cannot be met by conventional hoists and other lifting devices. This has become a technical problem that is difficult to solve at present.

[0006] Therefore, in order to solve the above-mentioned background problems and the technical difficulties of shaft-mounted generators on large ships, it is urgently necessary to study a cabin-mounted and installation method for shaft-mounted generators based on large ships. Summary of the invention

[0007] The purpose of the present invention is to solve the problems raised in the above background issues, and to provide a cabin-mounted and installation method for a shaft-mounted generator assembly based on a large ship, which innovatively improves the stability of the shaft generator assembly process of large ships and greatly reduces the construction difficulty.

[0008] The object of the present invention is achieved as follows: a method for loading and installing a shaft-mounted generator assembly into a cabin based on a large ship, characterized by: including a rotor shaft and rotor shaft coil assembly process, a shaft generator loading process, and an air gap adjustment process after underwater alignment;

[0009] The rotor shaft and rotor shaft coil assembly process is arranged before the shaft launch process, and sequentially includes the assembly preparation work of the rotor shaft and the rotor shaft coil, the installation work of the rotor shaft coil, and the flipping and placing of the rotor shaft in place;

[0010] The shaft-to-cabin process includes the stator case-to-cabin process, the rotor shaft-to-cabin process and the intermediate shaft-to-cabin process in sequence;

[0011] The air gap adjustment process after underwater centering is performed after the shaft launch into the cabin process.

[0012] The assembly preparation of the rotor shaft and the rotor shaft coil comprises the following steps:

[0013] Step 1: Set the tooling shaft in place and hoist the rotor shaft coil to the top of the tooling shaft;

[0014] Step 2: Set the rotor shaft coil on the top of the tooling shaft;

[0015] Step 3: Set the rotor shaft horizontally and install flange hangers on both sides of the rotor shaft;

[0016] Step 4: Lift the rotor shaft and turn it over to a vertical position.

[0017] Preferably, the bottom of the flange hanger is connected to both sides of the flange of the rotor shaft, and a hanging ring for rotation is provided on the top to facilitate the rotation adjustment of the rotor shaft.

[0018] The coil installation work of the rotor shaft includes the following steps:

[0019] Step 1: Smoothly align the vertically hoisted rotor shaft downward toward the coil and lower it vertically, passing through the rotor shaft coil;

[0020] Step 2: Connect and install the rotor shaft and the rotor shaft coil through the coil mounting bolts to form a whole;

[0021] Step 3: Lift the assembled rotor shaft and rotor shaft coil upwards through the flange lifting device and transport it away from the tooling shaft;

[0022] After the rotor shaft and the rotor shaft coil are assembled into a whole, the assembled rotor shaft and the rotor shaft coil are turned over and placed in a waiting position.

[0023] Preferably, the flipping and placing in position is to lift and flip the combination of the rotor shaft and the rotor shaft coil, and then place it flat on the bracket.

[0024] The stator box loading process includes the following steps:

[0025] Step 1: Slot the hull, set the wire rope groove, and hoist the stator box into the cabin;

[0026] Step 2: After the stator box is hoisted into the cabin, it is installed on the stator box base;

[0027] Step 3: The main engine of the ship enters the cabin;

[0028] Step 4: Determine the position of the stern tube and fix it by laser illuminating the main engine crankshaft hole and the coil hole of the stator box, and adjust the center position of the stator box at the same time;

[0029] Step 5: A shift trolley track is arranged on both sides of the box base, and a plurality of shift trolleys for supporting are arranged on the shift trolley track;

[0030] Step 6: Lift the stern shaft into the cabin. The stern shaft is supported by the axle-shifting trolley. The stern shaft flange and the rotor shaft flange are connected into a whole with temporary bolts. Adjust the height of the trolley to ensure that the axis is concentric with the coil axis of the stator box to facilitate smooth passage through the stator box, and finally ensure the integrity of the insulating paint of the rotor coil and the stator coil.

[0031] Preferably, in step 2 of the stator box positioning process, the stator box base is arranged in a left and right halves, including left and right halves that are symmetrically arranged.

[0032] The rotor shaft installation process is a process in which the rotor shaft is smoothly moved through the stator box by a shaft shifting trolley and enters the cabin, and includes the following steps:

[0033] Step 1: hoist the assembly of the rotor shaft and the rotor shaft coil into the cabin and place it on the axis shifting trolley on the left side of the stator box;

[0034] Step 2: flange-connect the rotor shaft and the rotor shaft coil assembly to the stern shaft at one side close to the stern shaft, so as to smoothly and contactlessly pass through the stator housing;

[0035] Step 3: The whole body connected with the assembly and the stern shaft is translated to one side of the stator housing through the axis shifting trolley, so that the assembly of the rotor shaft and the rotor shaft coil is translated to the corresponding installation position, and a roller bracket is arranged in the front middle part of the assembly, and a roller for supporting the rotor shaft is arranged on the top of the roller bracket;

[0036] Step 4: Remove the axis shifting trolley track and the axis shifting trolley on the right side of the stator box;

[0037] Step 5: Release the flange connection between the assembly and the stern shaft, and then move the stern shaft through the stern of the axis shifting trolley. Before moving, set a dummy shaft on the rear side of the stern shaft, pass it through the stern tube, put on the stern seal and press-fit the propeller.

[0038] Since large ships need to use a rail trolley to translate the rotor shaft through the stator box, and the front end of the rotor shaft needs to be withdrawn from the trolley before it translates through the stator box, the length of the rotor shaft is extended in disguise by temporarily connecting the rotor shaft to the stern shaft, which not only enhances the stability of the support but also facilitates smooth passage through the stator box.

[0039] The process of placing the intermediate shaft into the cabin is that after the assembly of the rotor shaft and the rotor shaft coil and the stern shaft are installed, the intermediate shaft is hoisted into the cabin and installed and fixed in the middle.

[0040] The air gap adjustment process after underwater centering includes the following steps:

[0041] Step 1: When centering underwater, make sure the coils are not touching each other and then align the center;

[0042] Step 2: Adjust the stator case through the adjusting bolts on the stator case base to make the gap between the stator case and the rotor shaft coil equal in the circumferential direction;

[0043] Step 3: Fix the stator box.

[0044] Preferably, the front-to-back deviation of the stator housing and the rotor shaft coil in the axial direction does not exceed 1 mm.

[0045] Compared with the prior art, the present invention has the following advantages:

[0046] The present invention provides a cabin installation and installation method for a shaft-holding type shaft-belt generator assembly based on a large ship. During the advance installation process, the tooling shaft is used to improve the stability between the rotor shaft and the rotor shaft coil in a vertical state.

[0047] The present invention provides a cabin installation and installation method for a shaft-holding shaft-belt generator assembly based on a large ship. During the process of the shaft generator being installed in the cabin, the rotor shaft and the rotor shaft coil are temporarily connected to form a combination with the stern shaft to form a whole, which in disguised form extends the length of the combination, so that the whole is supported more stably on the shaft shifting trolley. The whole is first passed through the stator case, then the connection is released, and the stern shaft is installed. This greatly facilitates the smooth passage of the combination formed by the rotor shaft and the rotor shaft coil through the stator case, and also greatly reduces the difficulty of assembling the combination formed by the rotor shaft and the rotor shaft coil and the stator case on the premise of a large ship, effectively solving the problem of the shaft generator being installed in the cabin of a large ship.

[0048] The present invention provides a cabin installation and installation method for a shaft-enclosed shaft-belt generator assembly based on a large ship. After underwater alignment, the gap between the stator case and the assembly is adjusted by adjusting the stator case, so as to accurately ensure that the gap between the stator case and the rotor shaft coil is circumferentially equal. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 The present invention is a schematic diagram of the overall process of loading and unloading a shaft-mounted shaft-belt generator assembly into a cabin and installing the shaft-mounted shaft-belt generator assembly in a large ship.

[0050] Figure 2 The invention discloses the preparation work of the rotor shaft coil in the preparation work for the cabin loading and installation method of a shaft-mounted shaft-belt generator assembly based on a large ship.

[0051] Figure 3 It is a schematic diagram of the state after the rotor shaft coil is in place during the preparation work for the installation of a shaft-engaged shaft-belt generator assembly based on a large ship and the installation method of the present invention.

[0052] Figure 4 The invention discloses a preparation work for the rotor shaft in the preparation work for the cabin loading and installation method of a shaft-engaged shaft-belt generator assembly based on a large ship.

[0053] Figure 5 It is a schematic diagram of the hoisting state of the rotor shaft during the preparation work for the cabin loading and installation method of a shaft-holding shaft-belt generator assembly based on a large ship according to the present invention.

[0054] Figure 6 It is a schematic diagram of the hoisting state of the rotor shaft during the hoisting and installation process of a shaft-holding shaft-belt generator assembly installed in a cabin and an installation method based on a large ship of the present invention.

[0055] Figure 7 The present invention is a schematic diagram of the assembly process of the rotor shaft and the rotor shaft coil during the lifting and installation process of a shaft-holding shaft-belt generator assembly installed in a cabin and an installation method based on a large ship.

[0056] Figure 8 It is a schematic diagram of a rotor shaft that has been assembled being hoisted out and put into position during the hoisting and installation process of a shaft-holding shaft-belt generator assembly installed in a cabin and an installation method based on a large ship of the present invention.

[0057] Fig. 9 It is a schematic diagram of the hoisting state of the stator box during the stator box positioning process of the shaft-holding shaft-belt generator assembly loading and installation method based on a large ship of the present invention.

[0058] Fig.10 It is a schematic diagram of the installation status of the stator box and the base during the stator box positioning process of the shaft-holding shaft-belt generator assembly installed in a cabin and the installation method based on a large ship of the present invention.

[0059] Fig.11 The present invention is a schematic diagram of the rotor shaft moving process of a shaft-mounted shaft-belt generator assembly installed in a cabin and an installation method based on a large ship.

[0060] Fig.12 It is a schematic diagram of the intermediate shaft entering the cabin after the rotor shaft is in place according to the installation method of the shaft-enclosed shaft-belt generator assembly based on a large ship of the present invention.

[0061] Among them are: 1. rotor shaft coil; 2. tooling shaft; 3. rotor shaft; 4. flange hanger; 5. coil mounting bolts; 6. hull; 7. wire rope groove; 8. stator box; 9. stator box base; 10. axis shifting trolley track; 11. axis shifting trolley; 12. stern shaft; 13. roller bracket; 14. rotor shaft base; 15. intermediate shaft. DETAILED DESCRIPTION

[0062] The present invention is described below in conjunction with the accompanying drawings and specific embodiments:

[0063] like Figures 1 to 12 As shown, it includes the assembly process of the rotor shaft and the rotor shaft coil, the shaft launch entering the cabin process and the air gap adjustment process after underwater alignment; the assembly process of the rotor shaft and the rotor shaft coil is arranged before the shaft launch entering the cabin process, and sequentially includes the assembly preparation work of the rotor shaft and the rotor shaft coil, the installation work of the rotor shaft coil and the flipping and placing in place; the shaft launch entering the cabin process sequentially includes the stator box entering the cabin process, the rotor shaft moving process and the intermediate shaft entering the cabin process;

[0064] The air gap adjustment process after underwater centering is performed after the shaft launch into the cabin process.

[0065] In this embodiment, if Figures 2~5 As shown, the assembly preparation of the rotor shaft and the rotor shaft coil of the present invention includes the following steps:

[0066] Step 1: Set the tooling shaft 2 in place, and hoist the rotor shaft coil 1 to the top of the tooling shaft 2;

[0067] Step 2: Place the rotor shaft coil 1 on the top of the tooling shaft 2;

[0068] Step 3: Set the rotor shaft 3 horizontally, and install flange hangers 4 on both sides of the rotor shaft 3;

[0069] Step 4: Lift the rotor shaft 3 and turn it over to a vertical position.

[0070] In this embodiment, the bottom of the flange hanger 4 in step 3 of the assembly preparation work is connected to both sides of the flange of the rotor shaft 3, and a hanging ring is provided on the top.

[0071] In this embodiment, if Figures 6-8 As shown, the installation coil work of the rotor shaft of the present invention includes the following steps:

[0072] Step 1: The vertically hoisted rotor shaft 3 is steadily hoisted downward to pass through the rotor shaft coil 1;

[0073] Step 2: Connect and install the rotor shaft 3 and the rotor shaft coil 1 through the coil mounting bolts 5 to form a whole;

[0074] Step 3: Lift the assembled rotor shaft 3 and rotor shaft coil 1 upwards through the flange lifting device 4 and lift it away from the tooling shaft 2;

[0075] After the lifting and installation of the rotor shaft is completed, the assembly of the installed rotor shaft 3 and the rotor shaft coil 1 is turned over and placed in place.

[0076] In this embodiment, illustratively, the flipping and placing in place is to place the combination of the rotor shaft 3 and the rotor shaft coil 1 flat on the bracket.

[0077] In this embodiment, if Figures 9 and 10 FIG. 1 is a process for loading a stator housing into a cabin according to the present invention, which includes the following steps:

[0078] Step 1: groove the hull 6, set the wire rope groove 7, and hoist the stator box 8 into the cabin;

[0079] Step 2: After the stator box 8 is hoisted into the cabin, it is installed on the stator box base 9;

[0080] Step 3: The main engine of the ship is put into the cabin. Since the main engine of a large ship is heavy and large in size, in this embodiment, five large cranes are used to separately lift the main engine onto the ship and then assemble it;

[0081] Step 4: Determine and fix the stern tube position by laser illuminating the main engine crankshaft hole of the ship and the coil hole of the stator case 8, and adjust the center position of the stator case 8 at the same time;

[0082] Step 5: A shift trolley track 10 is arranged on both sides of the box base 9, and a plurality of shift trolleys 11 for supporting are arranged on the shift trolley track 10;

[0083] Step 6: hoist the stern shaft 12 onto the rail trolley, the stern shaft 12 is supported by the axle-shifting trolley 11, and the height of the trolley is adjusted to ensure that the axis of the stern shaft 12 is concentric with the center of the stator housing 8 coil; at this time, the stern shaft 12 and the rotor 3 axis are temporarily integrated to facilitate smooth passage through the stator housing coil, which is equivalent to extending the length of the rotor shaft 3 and increasing the support force of the rotor shaft 3 during the translation process;

[0084] In this embodiment, the stator box base 9 in step 2 of the stator box positioning process is configured as a left and right half type.

[0085] In this embodiment, if Fig.11 FIG. 1 is a flow chart of the rotor shaft installation process of the present invention, which includes the following steps:

[0086] Step 1: hoist the assembly of the rotor shaft 3 and the rotor shaft coil 1 into the cabin and place them on the axis shifting trolley 11 on the left side of the stator box 8;

[0087] Step 2: flange-connect the rotor shaft 3 and the rotor shaft coil 1 assembly to the stern shaft 12 at one side close to the stern shaft 12, and adjust the height of the trolley to ensure that the axis of the stern shaft 12 is concentric with the center of the coil of the stator housing 8;

[0088] Step 3: The whole body connected with the stern shaft 12 is translated to one side of the stator housing 8 by the axis-shifting trolley 11, so that the assembly of the rotor shaft 3 and the rotor shaft coil 1 is translated to the corresponding installation position for installation and fixation;

[0089] Step 4: After the middle bearing is arranged in place, a roller bracket 13 for supporting the assembly is arranged, and a roller for supporting is arranged on the top of the roller bracket 13, and the axis shifting trolley track 10 and the axis shifting trolley 11 on the right side of the stator box 8 are removed, and a rotor shaft base 14 is arranged on the other side of the rotor shaft 3;

[0090] Step 5: Release the flange connection between the assembly and the stern shaft 12, then move the stern shaft 12 through the stern of the axis shifting trolley 11, and install and fix the stern shaft 12 according to the determined stern tube position.

[0091] In this embodiment, if Fig.12FIG. 1 shows the process of loading the intermediate shaft into the cabin of the present invention. After the assembly of the rotor shaft 3 and the rotor shaft coil 1 and the stern shaft 12 are installed, the intermediate shaft 15 is hoisted into the cabin and fixed in the middle.

[0092] In this embodiment, the air gap adjustment process after underwater centering includes the following steps:

[0093] Step 1: When centering underwater, make sure the coils are not touching each other and then align the center;

[0094] Step 2: Adjust the stator case 8 through the adjusting bolts on the stator case base 9 so that the gap between the stator case 8 and the rotor shaft coil 1 is equal in the circumferential direction;

[0095] Step 3: Fix the stator box 8.

[0096] In this embodiment, the front-to-rear deviation of the stator case 8 and the rotor shaft coil 1 in the axial direction is adjusted to not more than 1 mm; during the underwater comparison, the gap between the stator case 8 and the assembly is adjusted by adjusting the stator case 8, which can accurately ensure that the gap between the stator case and the rotor shaft coil is circumferentially equal.

[0097] In this embodiment, the present invention provides a cabin installation and installation method for a shaft-mounted shaft-belt generator assembly based on a large ship. For the shaft-mounted shaft generator assembly of a large ship, its installation process maximizes the stability of the installation process, reduces the difficulty of installation construction, and makes the shaft-mounted shaft generator assembly of a large ship possible.

[0098] The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A method for loading and installing a shaft-mounted generator assembly into a cabin based on a large ship, characterized in that: Including the assembly process of the rotor shaft and rotor shaft coil, the shaft engine entry process and the air gap adjustment process after underwater alignment; The rotor shaft and rotor shaft coil assembly process is arranged before the shaft launch process, and sequentially includes the assembly preparation work of the rotor shaft and the rotor shaft coil, the installation work of the rotor shaft coil, and the flipping and placing of the rotor shaft in place; The shaft launch cabin process includes the stator box cabin process, the rotor shaft transfer process and the intermediate shaft cabin process in sequence; in the shaft launch cabin process, the rotor shaft and the rotor shaft coil are temporarily connected to form a combination with the stern shaft to form a whole, which in disguise extends the length of the combination, so that the whole is supported more stably on the shaft shifting trolley, and the whole is first passed through the stator box, then the connection is released, and the stern shaft is installed; The air gap adjustment process after underwater centering is performed after the shaft launch into the cabin process.

2. According to claim 1, a method for loading and installing a shaft-mounted generator assembly into a cabin based on a large ship is characterized in that: The assembly preparation of the rotor shaft and the rotor shaft coil comprises the following steps: Step 1: Setting the tooling shaft (2) in place, and hoisting the rotor shaft coil (1) above the tooling shaft (2); Step 2: placing the rotor shaft coil (1) on the top of the tooling shaft (2); Step 3: The rotor shaft (3) is arranged horizontally, and flange hangers (4) are installed on both sides of the rotor shaft (3); Step 4: Lift the rotor shaft (3) and turn it over to a vertical position.

3. According to claim 2, a method for loading and installing a shaft-mounted generator assembly into a cabin based on a large ship is characterized in that: The bottom of the flange hanger (4) is connected to both sides of the flange of the rotor shaft (3), and a hanging ring for rotation is provided on the top.

4. According to claim 1, a method for loading and installing a shaft-mounted generator assembly into a cabin based on a large ship is characterized in that: The coil installation work of the rotor shaft includes the following steps: Step 1: The vertically suspended rotor shaft (3) is steadily lowered downward toward the coil and passed through the rotor shaft coil (1); Step 2: Connect and install the rotor shaft (3) and the rotor shaft coil (1) via the coil mounting bolts (5) to form an integral whole; Step 3: Lifting the assembled rotor shaft (3) and rotor shaft coil (1) upwards using a flange lifting device (4) to move the assembled rotor shaft (3) and rotor shaft coil (1) out of the tooling shaft (2); After the rotor shaft (3) and the rotor shaft coil (1) are assembled into a whole, the assembled rotor shaft (3) and the rotor shaft coil (1) are turned over and placed in a waiting position; The flipping and placing in position is to lift the assembly of the rotor shaft (3) and the rotor shaft coil (1), flip it, and then place it flat on the bracket.

5. According to claim 1, a method for loading and installing a shaft-mounted generator assembly into a cabin based on a large ship is characterized in that: The stator box loading process includes the following steps: Step 1: grooves are cut on the hull (6), wire rope grooves (7) are provided, and the stator housing (8) is hoisted into the cabin; Step 2: After the stator box (8) is hoisted into the cabin, it is installed on the stator box base (9); Step 3: The main engine of the ship enters the cabin; Step 4: Using laser light to illuminate the crankshaft hole of the main engine of the ship and the coil hole of the stator case (8), the stern tube position is determined and fixed, and the center position of the stator case (8) is adjusted at the same time; Step 5: A shifting trolley track (10) is arranged on both sides of the box base (9), and a plurality of shifting trolleys (11) for supporting are arranged on the shifting trolley track (10); Step 6: Lift the stern shaft (12) into the cabin. The stern shaft (12) is supported by the axle shifting trolley (11). The stern shaft flange and the rotor shaft flange are connected as a whole with temporary bolts. The height of the trolley is adjusted to ensure that the axis is concentric with the coil axis of the stator housing (8) to facilitate smooth passage through the stator housing (8). Finally, the insulation paint of the rotor coil and the stator coil is ensured to be intact.

6. A method for loading and installing a shaft-mounted generator assembly into a cabin based on a large ship according to claim 5, characterized in that: In step 2 of the stator box positioning process, the stator box base (9) is arranged in a left and right halves, including left and right halves that are symmetrically arranged.

7. According to claim 1, a method for loading and installing a shaft-mounted generator assembly into a cabin based on a large ship is characterized in that: The rotor shaft transfer process is a process in which the rotor shaft (3) is smoothly moved through the stator housing (8) by a shaft transfer trolley (11) and enters the cabin, comprising the following steps: Step 1: hoisting the assembly of the rotor shaft (3) and the rotor shaft coil (1) into the cabin and placing it on the axis shifting trolley (11) on the left side of the stator housing (8); Step 2: flange-connecting the rotor shaft (3) and the rotor shaft coil (1) to the stern shaft (12) at a side close to the stern shaft (12) to facilitate smooth and contactless passage through the stator housing (8); Step 3: The whole body connected to the assembly and the stern shaft (12) is translated toward one side of the stator housing (8) by means of the axis shifting trolley (11), so that the assembly of the rotor shaft (3) and the rotor shaft coil (1) is translated to a corresponding installation position, and a roller bracket (13) is arranged in the front middle part of the assembly, and a roller for supporting the rotor shaft (3) is arranged on the top of the roller bracket (13); Step 4: Remove the shifting trolley track (10) and the shifting trolley (11) on the right side of the stator housing (8); Step 5: Release the flange connection between the assembly and the stern shaft (12), and then move the stern shaft (12) by means of the axis shifting trolley (11). Before moving, a dummy shaft is sleeved on the rear side of the stern shaft, and after passing through the stern tube, a stern seal is sleeved and the propeller is press-fitted.

8. The method for loading and installing a shaft-mounted generator assembly into a cabin based on a large ship according to claim 1, characterized in that: The process of placing the intermediate shaft into the cabin is that after the rotor shaft (3) and the rotor shaft coil (1) assembly as well as the stern shaft (12) are installed, the intermediate shaft (15) is hoisted into the cabin and installed and fixed in the middle.

9. The method for loading and installing a shaft-mounted generator assembly into a cabin based on a large ship according to claim 1, characterized in that: The air gap adjustment process after underwater centering includes the following steps: Step 1: When centering underwater, make sure the coils are not touching each other and then align the center; Step 2: adjusting the stator case (8) by means of adjusting bolts on the stator case base (9) so that the gaps between the stator case (8) and the rotor shaft coil (1) are equal in the circumferential direction; Step 3: Fix the stator housing (8).

10. A method for loading and installing a shaft-mounted generator assembly into a cabin based on a large ship according to claim 9, characterized in that: The stator housing (8) and the rotor shaft coil (1) have a front-to-back deviation in the axial direction of no more than 1 mm.

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