A ship shafting installation process

Abstract

The application discloses a kind of ship shafting installation process, comprising the following steps: step one: shaft generator is assembled with combined auxiliary tooling to shaft generator base by step two: the assembled shaft generator with combined auxiliary tooling;Step three: combined auxiliary tooling is fixed with shaft generator base by bolt, nut;Step four: intermediate shaft is suspended in eccentric position of stern shaft beam in advance, install stern shaft;Step five: remove first auxiliary tooling;Step six: release the intermediate shaft suspended in advance, install the flange, finally hoist the main engine of ship;Beneficial effect is, the installation work of original shaft generator stator box and rotor in engine room is completed in workshop in advance, shaft generator can be advanced into cabin after assembly, neither affect the line drawing of axis, nor reduce hoisting operation time and the time of installing shafting in engine room, process flow is simplified, and workload is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of marine machinery technology, specifically to a marine shafting installation process. Background Technology

[0002] Currently, there are generally two installation methods for ship shaft-mounted generators:

[0003] Option 1:

[0004] Install the tail shaft, intermediate shaft, and rotor shaft, and fix the shaft system with a stabilizer frame below; lay the track in the main engine slot beforehand, then hoist the shaft-driven generator into the engine room from the hull opening, place it on the tooling rollers and track, and finally pull the shaft-driven generator onto the rotor shaft; this method has a complex process and a large amount of on-site work.

[0005] Option 2:

[0006] Due to the limitations of multiple platforms in the nacelle, shaft-driven generators are usually located below the bottom platform of the nacelle. This method involves skewed pulling and oblique lifting. Currently, the largest weight of shaft-driven generators is around 70 tons, and the designed rotor is also very long and heavy. This results in a very long and heavy size if directly hoisted, making the installation very difficult, labor-intensive, and time-consuming. The safety of assisted traction and placement cannot be guaranteed.

[0007] In view of the above, it is necessary to improve the existing shaft-driven generators to meet the current needs of shaft-driven generator installation and use. Summary of the Invention

[0008] The purpose of this invention is to solve the above-mentioned problems by designing a ship shafting installation process.

[0009] The technical solution of the present invention to achieve the above objectives is a ship shafting installation process, comprising the following steps:

[0010] Step 1: Assemble the shaft generator stator box and the shaft generator rotor on the combined auxiliary tooling; wherein, the combined auxiliary tooling includes a first auxiliary tooling and a second auxiliary tooling; the first auxiliary tooling is connected to the bottom of the shaft generator stator box by bolts and nuts, and the second auxiliary tooling is connected to the side of the shaft generator stator box by bolts and nuts.

[0011] Step 2: Install the assembled shaft-driven generator and the combined auxiliary tooling onto the shaft-driven generator base;

[0012] Step 3: Secure the combined auxiliary tooling to the shaft-driven generator base using bolts and nuts;

[0013] Step 4: The intermediate shaft is pre-suspended at the eccentric position of the tail shaft beam. After all the tail section of the engine room is installed and the conditions for axial alignment and illumination are met, the tail shaft is installed.

[0014] Step 5: Use the pulley above the shaft-driven generator to lift the shaft-driven generator and auxiliary fixture together, simultaneously remove the first auxiliary fixture, and install the shaft-driven generator onto the base and fix it in place;

[0015] Step Six: Release the pre-suspended intermediate shaft, install the connecting flange and other accessories, remove the second auxiliary tooling, and the shaft system installation will be completed. Finally, hoist the ship's main engine.

[0016] As a further supplement to this technical solution, in step one, the first auxiliary tooling includes a first mounting bracket and a second mounting bracket. There are two of each of the first and second mounting brackets. The two first mounting brackets and the second mounting bracket are fixedly installed to form a U-shaped cross section. The side and top of the first mounting bracket are provided with drill holes, and the side of the second mounting bracket is provided with drill holes. The first mounting bracket and the second mounting bracket are connected by bolts installed in the drill holes and then fixed by nuts. The bottom of the shaft stator box is connected and fixed to the first mounting bracket by bolts and nuts.

[0017] As a further addition to this technical solution, the bottom of the first mounting bracket is lower than the bottom of the second mounting bracket.

[0018] As a further supplement to this technical solution, in step one, the second auxiliary tooling includes mounting bases arranged around the shaft-generator-stator box, balance beams symmetrically arranged on the left and right sides of the shaft-generator-stator box, and shaft-generator shaft adjustment tooling arranged on the balance beams. The shaft-generator-stator box is fixed to the mounting bases by bolts and nuts. The balance beams are fixedly installed on the mounting bases, with each balance beam corresponding to two mounting bases. The shaft-generator shaft adjustment tooling is fixedly installed on the balance beams.

[0019] As a further supplement to this technical solution, the shaft adjustment fixture includes a lower slide rail, a lead screw mounted on the lower slide rail, and two pulley assemblies mounted on the lead screw. The lower slide rail is fixedly installed on a balance beam. The lead screw is connected to the lower slide rail via connecting end caps on both sides. The lead screw is rotatably mounted on the connecting end caps. The threads on the lead screw are symmetrically designed on both the front and rear sides. The two ends of the lead screw are also provided with bushings. The connecting end caps are fixedly installed on both sides of the lower slide rail by bolts. The shaft rotor is placed on the pulley assembly.

[0020] As a further supplement to this technical solution, the two ends of the lead screw, located on the outside of the connecting end cap, adopt a square head design.

[0021] As a further supplement to this technical solution, the pulley assembly includes a wheel assembly, a roller seat, and a locking cover plate. The two ends of the wheel assembly are mounted on the roller seat, and the two ends of the wheel assembly pass through the locking cover plate, which is fixedly mounted on the roller seat by bolts.

[0022] As a further supplement to this technical solution, the wheel assembly mechanism includes a shaft, a bearing disposed on the outside of the shaft, a wheel disposed on the outside of the bearing, a right end cap and a left end cap disposed on the left and right sides of the wheel, and oil nozzles disposed on both sides of the shaft. The outer rings of the right end cap and the left end cap are threaded and they are threaded to the inner ring of the wheel. The shaft has a lubricating oil injection port.

[0023] As a further supplement to this technical solution, the roller seat is welded together from two side plates, a base plate, and a connecting slide rail; the side plates are fixedly installed on the upper sides of the base plate, the connecting slide rail is located below the base plate, and the lead screw passes through and is connected to the connecting slide rail.

[0024] As a further supplement to this technical solution, a square notch is provided on one side of the base plate so that it does not affect the operation of the bushing.

[0025] Its beneficial effects are that the installation of the shaft generator stator box and rotor, which were originally installed in the engine room, can be completed in the workshop in advance. After the shaft generator is assembled, it can be moved into the engine room in advance. This does not affect the wiring and lighting of the shaft, and reduces the time for hoisting operations and the time for installing the shaft in the engine room. The process is simplified, the workload is greatly reduced, and the ship construction cycle is shortened. Compared with the traditional installation process, it has obvious advantages. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the installation structure for steps one, two, and three of the present invention;

[0027] Figure 2 This is a schematic diagram of the installation structure in step four of the present invention;

[0028] Figure 3 This is a schematic diagram of the installation structure in step five of the present invention;

[0029] Figure 4 This is a schematic diagram of the installation structure in step six of the present invention (without disassembling the second auxiliary tooling).

[0030] Figure 5 This is a schematic diagram of the installation structure of the shaft generator stator box, shaft generator rotor, and combined auxiliary tooling of the present invention;

[0031] Figure 6 This is a schematic diagram of the overall structure of the combined auxiliary tooling of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the shaft adjusting tool of the present invention;

[0033] Figure 8 This is a schematic diagram of the pulley assembly from the first angle.

[0034] Figure 9This is a schematic diagram of the pulley assembly from a second angle.

[0035] Figure 10 This is a schematic diagram of the pulley assembly from the third angle.

[0036] In the diagram, 1. First auxiliary tooling; 11. First mounting bracket; 12. Second mounting bracket; 21. Second auxiliary tooling; 22. Mounting base; 3. Balance beam; 4. Shaft adjustment tooling; 41. Lower slide rail; 42. Lead screw; 43. Pulley assembly; 44. Connecting end cover; 5. Shaft stator box; 6. Bushing; 7. Wheel assembly mechanism; 71. Shaft; 72. Wheel; 73. Right end cover; 74. Left end cover; 75. Oil nozzle; 8. Roller seat; 81. Side plate; 82. Base plate; 821. Square notch; 83. Connecting slide rail; 9. Locking cover plate; 10. Shaft rotor. Detailed Implementation

[0037] To facilitate a clearer understanding of this technical solution for those skilled in the art, the following will be described in conjunction with the appendix. Figure 1-10 The technical solution of the present invention is described in detail below:

[0038] A ship shafting installation process includes the following steps:

[0039] Step 1: Assemble the stator housing 5 and the rotor 10 on the combined auxiliary tooling; wherein, the combined auxiliary tooling includes a first auxiliary tooling 1 and a second auxiliary tooling 21; the first auxiliary tooling 1 is connected to the bottom of the stator housing 5 by bolts and nuts, and the second auxiliary tooling 21 is connected to the side of the stator housing 5 by bolts and nuts.

[0040] Step 2: Install the assembled shaft-driven generator and the combined auxiliary tooling onto the shaft-driven generator base;

[0041] Step 3: Secure the combined auxiliary tooling to the shaft-driven generator base using bolts and nuts;

[0042] Step 4: The intermediate shaft is pre-suspended at the eccentric position of the tail shaft beam. After all the tail section of the engine room is installed and the conditions for axial alignment and illumination are met, the tail shaft is installed.

[0043] Step 5: Lift the shaft-driven generator and auxiliary fixture together using the pulley above the shaft-driven generator, simultaneously remove the first auxiliary fixture 1, and install the shaft-driven generator onto the base for fixation; in detail, after the shaft system is illuminated by the pulley, the shaft-driven generator can be lifted 3-5cm using the pulley block and wire rope above the shaft-driven generator stator box 5, the first auxiliary fixture 1 can be removed, and it can be slowly released onto the shaft-driven generator base.

[0044] Step Six: Release the pre-suspended intermediate shaft, install the connecting flange and other accessories, remove the second auxiliary tooling 21, and the shaft system installation is complete. Finally, hoist the main engine of the ship. In detail, after the shaft system is illuminated by the pulley, the shaft-driven generator can be lifted 3-5cm by the pulley block and wire rope above the stator box 5 of the shaft generator. After removing the combined second auxiliary tooling 21, slowly release it onto the base of the shaft-driven generator and tighten the bolts. Then, place the intermediate shaft suspended on the stern beam into place, and finally hoist the main engine of the ship.

[0045] In step one, the first auxiliary tooling 1 includes a first mounting bracket 11 and a second mounting bracket 12. Two first mounting brackets 11 and two second mounting brackets 12 are provided, and the two first mounting brackets 11 and second mounting brackets 12 are fixedly installed to form a U-shaped cross-section. Drill holes are provided on the side and top of the first mounting bracket 11, and drill holes are provided on the side of the second mounting bracket 12. The first mounting bracket 11 and the second mounting bracket 12 are connected by bolts installed in the drill holes and then fixed by nuts. The bottom of the shaft stator box 5 is connected and fixed to the first mounting bracket 11 by bolts and nuts. During operation, the bottom of the first mounting bracket 11 is set lower than the bottom of the second mounting bracket 12, creating a space for shaft system wire lighting between the shaft stator box 5 and the first mounting bracket 11.

[0046] In step one, the second auxiliary tooling 21 includes mounting bases 22 arranged around the shaft stator box 5, balance beams 3 symmetrically arranged on the left and right sides of the shaft stator box 5, and shaft adjustment tooling 4 arranged on the balance beams 3. The shaft stator box 5 is fixed to the mounting bases 22 by bolts and nuts. The balance beams 3 are fixedly installed on the mounting bases 22, and each balance beam 3 corresponds to two mounting bases 22. The shaft adjustment tooling 4 is fixedly installed on the balance beams 3.

[0047] The structure of the shaft adjustment fixture 4 will be described in detail below. The shaft adjustment fixture 4 includes a lower slide rail 41, a lead screw 42 mounted on the lower slide rail 41, and two pulley assemblies 43 mounted on the lead screw 42. The lower slide rail 41 is fixedly mounted on the balance beam 3. The lead screw 42 is connected to the lower slide rail 41 through connecting end caps 44 on both sides. The lead screw 42 is rotatably mounted on the connecting end caps 44. The threads on the lead screw 42 are symmetrically designed on both the front and rear sides. The two ends of the lead screw 42 are also provided with bushings 6. The connecting end caps 44 are fixedly mounted on both sides of the lower slide rail 41 by bolts. The shaft rotor 10 is placed on the pulley assembly 43. The pulley assembly 43 can accurately control the distance between the rotor shaft and the shaft stator box 5. In order to facilitate the control of the lead screw 42, the two ends of the lead screw 42 are... Furthermore, the outer side of the connecting end cover 44 adopts a square head design, which makes it convenient for workers to adjust the lead screw 42 with a wrench to adjust the roller assembly on it, thereby meeting the installation and use requirements of the shaft generator rotor 10. During operation, the shaft generator rotor 10 is connected to the dummy shaft in series with bolts and nuts, hoisted and inserted into the shaft generator stator box 5, and then the shaft-driven generator rotor adjustment fixture is installed. After the lead screw 42 and the two pulley assemblies 43 are installed, the bushings 6 are installed at both ends of the lead screw 42. After the above installation is completed, it is placed in the lower slide rail 41, and end covers are installed at both ends and tightened with bolts. By adjusting the axial movement of the pulley assembly 43 in opposite directions by adjusting the wrench at the end of the lead screw 42, the precise positioning of the shaft generator rotor 10 can be quickly adjusted. After the adjustment is completed, the nuts on the two pulley assemblies 43 are locked to achieve the purpose of locking.

[0048] The structure of the pulley assembly 43 will be described in detail below. The pulley assembly 43 includes a wheel assembly mechanism 7, a roller seat 8, and a locking cover plate 9. The two ends of the wheel assembly mechanism 7 are mounted on the roller seat 8, and the two ends of the wheel assembly mechanism 7 pass through the locking cover plate 9, which is fixedly mounted on the roller seat 8 by bolts. The wheel assembly mechanism 7 includes a shaft 71, a bearing located on the outside of the shaft 71, a wheel 72 located on the outside of the bearing, a right end cover 73 and a left end cover 74 located on the left and right sides of the wheel 72, and oil nozzles 75 located on both sides of the shaft 71. The right end cover 73 and the left end cover 74 have threads on their outer rings and are threaded to the wheel. The inner ring of the sleeve 72 is threaded, and the shaft 71 has a lubricating oil injection port. The overall structure is compact and small, making it easy to maintain. The roller seat 8 is welded together from two side plates 81, a base plate 82, and a connecting slide rail 83. The side plates 81 are fixedly installed on the upper sides of the base plate 82, and the connecting slide rail 83 is located below the base plate 82. The lead screw 42 passes through the connecting slide rail 83 and is connected to it. Each of the two side plates 81 has three threaded holes, and the base plate 82 has holes drilled at its four corners and a square notch 821 at one end to avoid interference with the bushing 6. The connecting slide rail 83 has threaded holes that match the lead screw 42.

[0049] This technical solution uses detachable modular tooling to facilitate entry and exit from the complex environment of the engine room.

[0050] The above technical solutions only embody the preferred technical solutions of the present invention. Any modifications that may be made by those skilled in the art to certain parts thereof embody the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A ship shafting installation process, characterized in that, Includes the following steps: Step 1: Assemble the stator box (5) and the rotor (10) on the combined auxiliary tooling; wherein, the combined auxiliary tooling includes a first auxiliary tooling (1) and a second auxiliary tooling (21); the first auxiliary tooling (1) is connected to the bottom of the stator box (5) by bolts and nuts, and the second auxiliary tooling (21) is connected to the side of the stator box (5) by bolts and nuts; Step 2: Install the assembled shaft-driven generator and the combined auxiliary tooling onto the shaft-driven generator base; Step 3: Secure the combined auxiliary tooling to the shaft-driven generator base using bolts and nuts; Step 4: The intermediate shaft is pre-suspended at the eccentric position of the tail shaft beam. After all the tail section of the engine room is installed and the conditions for axial alignment and illumination are met, the tail shaft is installed. Step 5: Lift the shaft-driven generator and auxiliary tooling together using the pulley above the shaft-driven generator, simultaneously remove the first auxiliary tooling (1), and install the shaft-driven generator onto the base for fixation; Step 6: Release the pre-suspended intermediate shaft, install the sleeve flange, remove the second auxiliary tooling (21), and the shaft system installation can be completed. Finally, hoist the ship's main engine. In step one, the first auxiliary tooling (1) includes a first mounting bracket (11) and a second mounting bracket (12). There are two of each of the first mounting bracket (11) and the second mounting bracket (12). The two first mounting brackets (11) and the second mounting bracket (12) are fixedly installed to form a cross-section in the shape of a square. The side and top of the first mounting bracket (11) are provided with drill holes. The side of the second mounting bracket (12) is provided with drill holes. The first mounting bracket (11) and the second mounting bracket (12) are connected by bolts and installed in the drill holes and then fixed by nuts. The bottom of the shaft stator box (5) is connected and fixed to the first mounting bracket (11) by bolts and nuts. In step one, the second auxiliary tooling (21) includes mounting bases (22) arranged around the shaft stator box (5), balance beams (3) symmetrically arranged on the left and right sides of the shaft stator box (5), and shaft adjustment tooling (4) arranged on the balance beams (3). The shaft stator box (5) and the mounting base (22) are fixed by bolts and nuts. The balance beams (3) are fixedly installed on the mounting bases (22). Each balance beam (3) corresponds to two mounting bases (22). The shaft adjustment tooling (4) is fixedly installed on the balance beams (3). The shaft adjustment fixture (4) includes a lower slide rail (41), a lead screw (42) mounted on the lower slide rail (41), and two pulley assemblies (43) mounted on the lead screw (42). The lower slide rail (41) is fixedly mounted on the balance beam (3). The lead screw (42) is connected to the lower slide rail (41) through connecting end caps (44) on both sides. The lead screw (42) is rotatably mounted on the connecting end caps (44). The threads on the lead screw (42) are symmetrically designed on both sides. The two ends of the lead screw (42) are also provided with bushings (6). The connecting end caps (44) are fixedly mounted on both sides of the lower slide rail (41) by bolts. The shaft rotor is placed on the pulley assembly (43).

2. The ship shafting installation process according to claim 1, characterized in that, The bottom of the first mounting bracket (11) is lower than the bottom of the second mounting bracket (12).

3. The ship shafting installation process according to claim 1, characterized in that, The two ends of the lead screw (42) and located outside the connecting end cap (44) are designed with square heads.

4. The ship shafting installation process according to claim 1, characterized in that, The pulley assembly (43) includes a wheel assembly (7), a roller seat (8), and a locking cover plate (9). The two ends of the wheel assembly (7) are mounted on the roller seat (8), and the two ends of the wheel assembly (7) pass through the locking cover plate (9), which is fixedly mounted on the roller seat (8) by bolts.

5. The ship shafting installation process according to claim 4, characterized in that, The wheel assembly (7) includes a shaft (71), a bearing located on the outside of the shaft (71), a wheel (72) located on the outside of the bearing, a right end cap (73) and a left end cap (74) located on the left and right sides of the wheel (72), and oil nozzles (75) located on both sides of the shaft (71). The right end cap (73) and the left end cap (74) have threads on their outer rings and are threaded to the inner ring of the wheel (72). The shaft (71) has a lubricating oil injection port.

6. The ship shafting installation process according to claim 5, characterized in that, The roller seat (8) is welded together from two side plates (81), a base plate (82), and a connecting slide rail (83). The side plates (81) are fixedly installed on the upper sides of the base plate (82), the connecting slide rail (83) is located below the base plate (82), and the lead screw (42) passes through the connecting slide rail (83) and is connected to it.

7. The ship shafting installation process according to claim 6, characterized in that, The base plate (82) also has a square notch (821) on one side so that it does not affect the operation of the bushing (6).

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