Distributed permanent magnet shaft-holding type shaft generator and method for debugging, installing and removing same

Abstract

The application belongs to the technical field of manufacturing of marine shaft generator, and particularly relates to a distributed permanent magnet holding shaft type shaft generator. The stator, rotor, front split protection large cover (21), rear split protection large cover (27), split protection small cover (28) and tension sleeve of the generator are split structures. The stator comprises two split stators, i.e. a left split stator (1) and a right split stator (2), and the two split stators are movably connected. The rotor comprises two split rotors with the same structure, i.e. split rotors (15), which comprise a plurality of rotor cores (11), magnetic steels (14) and split rotor supports (13), and the two split rotors (15) are movably connected. The tension sleeve comprises two split tension sleeves (19) with the same structure, and the two split tension sleeves are movably connected. The split stator, split rotor and split tension sleeve (19) are sequentially sleeved from outside to inside to form a semi-ring shape.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of manufacturing of a ship-mounted shaft-holding type shaft generator, and more particularly to a distributed permanent magnet shaft-holding type shaft generator and a debugging, installation and removal method thereof. BACKGROUND

[0002] With the recent implementation of the carbon emission intensity index and the existing ship energy efficiency index, the emission of the sailing ship is required to be classified and managed, and specific measures are required to be given to the sailing ship that does not meet the requirements for improvement within a limited period, and the sailing ship that continuously fails the rating will be affected in sailing. The compulsory implementation of the energy efficiency index and the rating management will have a profound impact on the shipping industry.

[0003] Energy saving can not only reduce fuel consumption, but also achieve the purpose of reducing CO2 emissions. As one of the important energy-saving devices, the low-speed shaft generator can fully utilize the standby power of the main engine to generate electricity, improve the energy utilization rate of the ship, and reduce the carbon emission of the ship. It is an effective means to improve the energy efficiency index and improve the rating of the existing ship.

[0004] For the existing ship with a shaft-mounted generator, the existing technology, such as a half-type permanent magnet shaft-holding type shaft generator and an assembly method thereof (Patent No. 202311017261.X), divides the motor stator and rotor into two parts, which solves the problem of installing a shaft-mounted generator on an existing ship without changing the original structure and layout. In the installation process, the half stator and rotor are fixed as a whole by using an L-shaped connecting piece to avoid magnetic attraction between the permanent magnet and the surrounding iron parts. However, in the actual installation process, it is necessary to first evaluate the existing ship, and it is found that many existing ships have limited hoisting space size, and it is not possible to fix the half stator and rotor and then hoist the whole. For example, when selecting the installation position of the middle shaft, there are many pipelines and other obstacles arranged intermittently below, so that there is no continuous shaft section for motor installation. Finally, due to the limited hoisting and installation space, the generator cannot be installed, or it brings great difficulty to subsequent maintenance. The motor has no fault tolerance and cannot be used after failure.

[0005] The existing permanent magnet shaft generator has a large overall volume and weight, which makes it difficult to hoist and install for old ship modification. Since the ocean-going ships generally have a long sea sailing time, if a fault occurs, it needs to be removed within three hours to avoid additional load on the main engine. The large volume and weight also bring great difficulty to disassembly and assembly, and it is difficult to completely remove it within 3 hours after failure. The entire generator cannot work after failure. The installation space and assembly space of the generator for old ship modification are not sufficient, and it is very difficult to adjust the air gap of the motor in a limited space and ensure uniform air gap, and it is often necessary to enlarge the motor air gap to avoid failure caused by uneven adjustment. SUMMARY

[0006] The application provides a distributed permanent magnet holding shaft type shaft-mounted generator and a debugging, installation and removal method thereof.

[0007] In order to achieve the above-mentioned purpose, the application realizes the purpose by the following technical scheme:

[0008] In a first aspect, the application provides a distributed permanent magnet holding shaft type shaft-mounted generator, which comprises a module unit, the module unit comprising a stator, a rotor and a tension sleeve, the rotor being arranged in the stator, and the tension sleeve being arranged in the rotor, the stator, the rotor and the tension sleeve being of a split structure and coaxially arranged.

[0009] The stator comprises two split stators arranged opposite to each other, the split stators being fixed in split housings and respectively provided with winding stator cores, the upper and lower ends of the two split housings being connected through first mounting bolts, and the tail portions of the first mounting bolts being screwed with first mounting nuts; a housing footing is arranged below the side of the split stator, the housing footing comprising a footing support and a housing mounting leg, the footing support being located at the bottom of the housing mounting leg, and the footing support and the housing mounting leg being connected through second mounting bolts, and the tail portions of the second mounting bolts being screwed with second mounting nuts.

[0010] The rotor comprises two split rotors arranged opposite to each other, the split rotors comprising a plurality of rotor cores and a split rotor support, the plurality of rotor cores being sequentially connected and arranged outside the split rotor support, and the rotor cores being embedded with a plurality of magnetic steels in parallel inside the side close to the split stator; the split rotor support is of a semi-ring structure with a hollow middle portion, the two split rotor supports being connected through third mounting bolts, and the tail portions of the third mounting bolts being screwed with third mounting nuts; the split rotor support and the plurality of rotor cores are respectively connected through fourth mounting bolts.

[0011] The tension sleeve comprises two split tension sleeves arranged opposite to each other, the split tension sleeves being provided with fastening bolts for fastening the rotor and a main shaft clamped between the two split tension sleeves.

[0012] The at least two module units are connected in series on the main shaft and arranged side by side, the two adjacent module units being connected through connecting bolts; the module units located at the two ends are respectively provided with protective covers on the outer sides, the protective covers being of a split structure, the protective covers comprising two split protective large covers arranged opposite to each other and two split protective small covers arranged opposite to each other, the two split protective large covers being mounted on the split housings through first stop mouths, the two split protective small covers being connected in the split protective large covers through second stop mouths, and the main shaft being clamped in the two split protective small covers.

[0013] In a preferred scheme, the rotor core is provided with a key groove inside the split rotor support, a rotor fixing key is embedded in the key groove, and the rotor fixing key is screwed with the fourth mounting bolt.

[0014] In the preferred solution, axial positioning pins are arranged on both ends of the two split housings in the direction of the main shaft.

[0015] In the preferred solution, the end of the housing mounting leg away from the main shaft is bent vertically downward along the outer edge of the footing support to form a first end face, a first hard alloy slider is arranged between the first end face and the outer edge of the footing support, a first oil storage groove is arranged on the surface of the side of the first hard alloy slider close to the footing support, the first hard alloy slider has a first oil injection hole, the first oil injection hole penetrates through the first hard alloy slider and is in communication with the first oil storage groove; a second hard alloy slider is arranged between the bottom of the housing mounting leg and the top of the footing support, a second oil storage groove is arranged on the surface of the side of the second hard alloy slider close to the footing support, the second hard alloy slider has a second oil injection hole, the second oil injection hole penetrates through the second hard alloy slider and is in communication with the second oil storage groove.

[0016] In the preferred solution, a first oil injection channel in communication with the first oil injection hole is arranged in the first end face; a second oil injection channel in communication with the second oil injection hole is arranged in the bottom of the housing mounting leg.

[0017] In the preferred solution, the first end face has a bolt through hole, an adjusting bolt with a locking nut is arranged in the bolt through hole, and the bottom end of the adjusting bolt abuts against the footing support.

[0018] In the preferred solution, stress plates are arranged on both sides of the housing mounting leg in the direction of the main shaft, and the stress plates are connected with the housing mounting leg through mounting and dismounting bolts with locking nuts.

[0019] In the second aspect of the present application, a debugging method of the above-mentioned distributed permanent magnet shaft-holding type shaft-alternator is provided, which is used for installing and debugging the alternator before delivery to ensure that the alternator meets the delivery requirements, and includes the following steps:

[0020] Sa1, a plurality of rotor cores without embedded magnetic steel are connected in series and fixed on the outside of the split rotor support through the fourth mounting bolt to form a split rotor without magnetic steel;

[0021] Sa2, the step Sa1 is repeated, two split rotors without magnetic steel are a group, and a plurality of groups of split rotors without magnetic steel are assembled;

[0022] Sa3, the two split positioning covers are connected into a whole circle and fixed on the delivery tool shaft, and the two front split protection covers are connected and fixed into a whole circle in an up-down distribution manner and connected and fixed with the two split positioning covers through the second stop opening.

[0023] Sa4, the left and right split stators are placed symmetrically on both sides of the factory tooling shaft and are closed to the factory tooling shaft, the left and right split stators are connected together by the first mounting bolt and are fastened by the first mounting nut, and a complete stator is formed; the foot support and the cabinet installation leg are connected together by the second mounting bolt and are fastened by the second mounting nut;

[0024] Sa5, the two non-magnetic steel split rotors are placed symmetrically on both sides of the factory tooling shaft, the two split rotor supports are connected by the third mounting bolt and are fastened by the third mounting nut, a non-magnetic steel rotor is formed, and the two split tension sleeves are pushed into the non-magnetic steel rotor and the factory tooling shaft, so that the inner wall of the two split tension sleeves is attached to the outer wall of the factory tooling shaft, and the outer wall of the two split tension sleeves is attached to the inner wall of the non-magnetic steel rotor;

[0025] Sa6, the non-magnetic steel rotor and the two split tension sleeves are pushed into the stator, the winding stator core and the rotor core are aligned, and the fastening bolts on the two split tension sleeves are adjusted to produce an interference fit between the outer diameter of the split tension sleeve and the inner diameter of the non-magnetic steel rotor;

[0026] Sa7, the adjusting bolt is adjusted to make a slight adjustment to the stator in the radial direction, the uniformity of the air gap between the stator and the rotor is detected, and when the air gap uniformity is not greater than 2%, the adjusting bolt is locked by the locking nut to fix the position of the stator;

[0027] Sa8, the magnetic steel is inlaid into the rotor core to make the rotor magnetic;

[0028] Sa9, the two split positioning covers are removed to form a module unit, so that the generator can operate normally, the generator is tested before leaving the factory, the wiring and the magnetic steel inlay direction of the generator are checked, and it is ensured that the generator meets the factory requirements;

[0029] Sa10, steps Sa4-Sa9 are repeated to install and debug multiple module units;

[0030] Sa11, after the installation and debugging of all module units are completed, the fourth mounting bolt of the last module is loosened, the rotor core is adsorbed to the inner diameter of the stator, and the fourth mounting bolt remains connected through the fourth mounting thread hole on the split rotor support and the fourth threaded hole on the rotor fixing key, but is not fastened;

[0031] Sa12, the third mounting bolt and the third mounting nut connecting the two split rotor supports are removed, and the two split rotors are adsorbed to the left and right split stators, respectively;

[0032] Sa13, loosen the locking nut, adjust the position of the stator limiting bolt; remove the first mounting bolt, the first mounting nut, the second mounting bolt and the second mounting nut respectively to form the left and right stator rotor;

[0033] Sa14, repeat steps Sa11-Sa13, remove the remaining module units one by one;

[0034] Sa15, remove the two front split protection large covers.

[0035] The third aspect of the application provides a mounting method of the above-mentioned distributed permanent magnet shaft type generator, characterized in that it comprises the following steps:

[0036] Sb1, install and fix two split positioning covers on the ship main shaft, connect and fix two front split protection large covers into a whole circle in an up-down distribution manner, and install them together with the two split positioning covers to form a positioning stopper concentric with the ship main shaft;

[0037] Sb2, symmetrically place the left and right split stators on both sides of the ship main shaft and close to the ship main shaft, so that the stopper of the left and right split stators is installed in cooperation with the stopper of the front split protection large cover, and the first bolt and the first mounting nut are used to fix the left and right split stators together; the second mounting bolt is connected with the second mounting nut through the second bolt hole on the leg of the foot support machine shell and is fastened;

[0038] Sb3, the third mounting bolt is connected with the third mounting nut through the third bolt hole on the two split rotor supports and is fixed, and the two split rotor supports are spliced into a circle; the two split expansion sleeves are pushed into the split rotor ship main shaft, so that the inner wall of the two split expansion sleeves is attached to the outer wall of the ship main shaft, and the outer wall of the two split expansion sleeves is attached to the inner wall of the rotor, and then the fastening bolt of the two split expansion sleeves is adjusted to make the outer diameter of the split expansion sleeve and the inner diameter of the rotor produce interference fit; the two split expansion sleeves are located in the two split rotors respectively;

[0039] Sb4, tighten the fourth mounting bolt, so that the rotor core is separated from the inner diameter of the stator to form an air gap;

[0040] Sb5, repeat steps Sb2-Sb4 to install multiple module units, and the adjacent surfaces of the module units are attached to each other;

[0041] Sb6, install two split rear protection large covers and two split protection small covers.

[0042] The fourth aspect of the present application provides a method for disassembling the distributed permanent magnet shaft coupling type generator, quickly disassembling the module unit in the middle and reassembling the remaining module units to ensure normal operation of the generator, the module unit comprising the second module unit in the middle and the first module unit and the third module unit located on the front and rear sides of the second module unit respectively, and comprising the following steps:

[0043] Sc1. When the second module unit needs to be quickly separated due to failure, the split protective large cover and the split protective small cover are disassembled;

[0044] Sc2. Loosen the fourth mounting bolts on the second module unit and the third module unit, so that the rotor core is adsorbed to the inner diameter of the stator, and the fourth mounting bolts remain connected with the fourth threaded holes on the rotor fixing key through the fourth mounting threaded holes on the split rotor support, but are not fastened;

[0045] Sc3. Disassemble the connecting bolts between the first module unit and the second module unit, tighten the disassembly bolts connected with the threaded holes of the shell mounting legs of the third module unit, and axially pull out the second module unit and the third module unit, when the distance between the first module unit and the second module unit is greater than the width of the connecting stop, disassemble the connecting bolts between the second module unit and the third module unit, continue to tighten the disassembly bolts connected with the threaded holes of the shell mounting legs of the third module unit, and when the distance between the second module unit and the third module unit is greater than the width of the connecting stop, hoist out the second module unit;

[0046] Sc4. Disassemble the disassembly bolts connected with the threaded holes of the shell mounting legs of the third module unit, add a solid pad between the shell mounting legs of the third module unit and the stress plate, screw the disassembly bolts into the threaded holes, push the third module unit to the position of the original second module unit, and pause until the connecting stop of the third module unit and the first module unit is installed in place;

[0047] Sc5. Tighten the connecting bolts of the third module unit and the first module unit;

[0048] Sc6. Fasten the fourth mounting bolts on the rotor of the third module unit, so that the rotor core is separated from the inner diameter of the stator to form an air gap;

[0049] Sc7. Reinstall the disassembled rear protective large cover and split protective small cover in place.

[0050] Advantages of the present application

[0051] The application is composed of multiple modular units, which has the following advantages: 1. According to the lifting conditions and installation space design of most ocean-going ships, the installation difficulty is reduced; 2. The distributed structure can realize the exchange and increase or decrease of the module units, improve the universality, and use the module unit standby machine during the ship process, which is convenient to replace and convenient to improve the capacity of the whole machine; 3. The left and right split direct shaft structure is directly installed after lifting, without rotating installation, which reasonably optimizes the disassembly and assembly process and ensures the uniform air gap; 4. It has fault tolerance and can quickly remove the faulty module unit without affecting the normal operation of other module units; 5. It has air gap detection capability and can provide early warning. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 and Figure 2 is a schematic diagram of the left split stator and right split stator structure of the application;

[0053] Figure 3 is a schematic diagram of the split rotor structure of the application;

[0054] Figure 4 is a schematic diagram of the installation structure of the rotor core and rotor fixing key of the application;

[0055] Figure 5 is a schematic diagram of the rotor structure of the application;

[0056] Figure 6 is a schematic diagram of the single module assembly state before shipment of the application;

[0057] Figure 7 is a schematic diagram of the multiple module assembly state before shipment of the application;

[0058] Figure 8 is a schematic diagram of the multiple module assembly completion of the application

[0059] Figure 9 is a schematic diagram of the left split stator and right split stator structure of the application;

[0060] Figure 10 is a schematic diagram of the single module assembly state on site of the application;

[0061] Figure 11 is a schematic diagram of the multiple module assembly state on site of the application;

[0062] Figure 12 and Figure 13 is a schematic diagram of the multiple module assembly completion state of the application;

[0063] Figure 14 is a schematic diagram of the disassembly design of the application.

[0064] In the diagram, 1-left split stator; 2-right split stator; 3-second mounting bolt; 4-foot bracket; 5-casing mounting leg; 6-second mounting nut; 7-first mounting nut; 8-first mounting bolt; 9-locking nut; 10-adjusting bolt; 11-rotor core; 12-fourth mounting bolt; 13-split rotor bracket; 14-magnet; 15-split rotor; 16-rotor fixing key; 17-third mounting bolt; 18-third mounting nut; 19-split tension sleeve; 20-axial positioning pin; 21-front split protective cover; 22-split positioning pin 23-Factory tooling shaft; 24-Left lobe stator and rotor; 25-Right lobe stator and rotor; 26-Main shaft of the ship; 27-Rear lobe protective cover; 28-Small lobe protective cover; 29-First module unit; 30-Second module unit; 31-Third module unit; 32-Air gap sensor; 33-Junction box; 34-First carbide slider; 35-First oil injection hole; 36-First oil reservoir; 37-Second carbide slider; 38-Second oil injection hole; 39-Second oil reservoir; 40-Force plate; 41-Removal bolt lock nut; 42-Installation and removal bolt. Detailed Implementation

[0065] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0066] Detailed overview of the invention

[0067] like Figures 1-14 As shown, a distributed permanent magnet shaft-mounted generator includes a modular unit, which includes a stator, a rotor, and a tensioning sleeve. The rotor is arranged inside the stator, and the tensioning sleeve is arranged inside the rotor. The stator, rotor, and tensioning sleeve are segmented structures and arranged coaxially.

[0068] The stator includes two segmented stators facing each other, which are fixed inside the segmented housing. Each segmented stator has a winding stator core. The upper and lower ends of the two segmented housings are connected by first mounting bolts 8, and the tail of the first mounting bolts 8 is screwed with a first mounting nut 7. The lower side of the segmented stator is provided with a housing foot, which includes a foot bracket 4 and a housing mounting leg 5. The foot bracket 4 is located at the bottom of the housing mounting leg 5. The foot bracket 4 and the housing mounting leg 5 are connected by second mounting bolts 3, and the tail of the second mounting bolts 3 is screwed with a second mounting nut 6.

[0069] The rotor comprises two split rotors 15 arranged opposite to each other, the split rotor 15 comprises a plurality of rotor cores 11 connected in sequence and arranged outside the split rotor support 13, and a plurality of magnetic steels 14 are embedded in the rotor core 11 in parallel inside the split stator side; the split rotor support 13 is a semi-ring structure with a hollow middle part, the two split rotor supports 13 are connected through the third mounting bolt 17, and the third mounting nut 18 is screwed at the tail of the third mounting bolt 17; the split rotor support 13 and the plurality of rotor cores 11 are connected through the fourth mounting bolt 12 respectively.

[0070] The expansion sleeve comprises two split expansion sleeves 19 arranged opposite to each other, and the split expansion sleeve 19 is provided with a fastening bolt for fastening the rotor and the main shaft clamped between the two split expansion sleeves 19.

[0071] The at least two module units are connected in series and arranged side by side on the main shaft, and the adjacent two module units are connected through the connecting bolt; the module units located at both ends are respectively provided with protective covers on the outer side, the protective cover is a split structure, the protective cover comprises two split protective large covers arranged opposite to each other and two split protective small covers 28 arranged opposite to each other, the two split protective large covers are mounted on the split shell through the first stopper, the two split protective small covers 28 are connected in the split protective large cover through the second stopper, and the main shaft is clamped in the two split protective small covers 28.

[0072] The rotor core 11 is provided with a key groove inside the split rotor support 13, the rotor fixing key 16 is embedded in the key groove, and the rotor fixing key 16 is screwed with the fourth mounting bolt 12.

[0073] The axial positioning pin 20 is installed on both sides of the main shaft direction at the butt joint of the upper and lower ends of the two split shells.

[0074] The first end face is formed by bending the machine shell mounting leg 5 vertically downward along the outer edge of the foot support 4 away from the main shaft, a first hard alloy sliding block 34 is arranged between the first end face and the outer edge of the foot support 4, a first oil storage groove 36 is arranged on the surface of the first hard alloy sliding block 34 close to the foot support 4, the first hard alloy sliding block 34 has a first oil injection hole 35, the first oil injection hole 35 penetrates through the first hard alloy sliding block 34 and communicates with the first oil storage groove 36; a second hard alloy sliding block 37 is arranged between the bottom of the machine shell mounting leg 5 and the top of the foot support 4, a second oil storage groove 39 is arranged on the surface of the second hard alloy sliding block 37 close to the foot support 4, the second hard alloy sliding block 37 has a second oil injection hole 38, the second oil injection hole 38 penetrates through the second hard alloy sliding block 37 and communicates with the second oil storage groove 39.

[0075] The first end face is provided with a first oil injection channel communicating with the first oil injection hole 35; the bottom of the machine shell mounting leg 5 is provided with a second oil injection channel communicating with the second oil injection hole 38.

[0076] The first end face has a bolt through hole, and an adjusting bolt 10 with a locking nut 9 is installed in the bolt through hole, and the bottom end of the adjusting bolt 10 abuts against the foot support 4.

[0077] The casing mounting leg 5 is provided with a force plate 40 on both sides along the main shaft direction, and the force plate 40 is connected with the casing mounting leg 5 through mounting and dismounting bolts 42 with dismounting bolt locking nuts 41.

[0078] A debugging method of the above-mentioned distributed permanent magnet shaft-holding type shaft-alternator, which ensures that the alternator meets the optimal scheme required by on-site installation after leaving the factory, comprises the following steps:

[0079] S1, sequentially assemble the split tension sleeve, the split rotor and the split stator from inside to outside to form a split motor;

[0080] S2, place the two split motors on both sides of the ship main shaft, and fix the two split stators, the two split rotors and the two split tension sleeves with bolts respectively;

[0081] S3, adjust the tensioning bolt provided on the split tension sleeve to fix the rotor on the ship main shaft;

[0082] S4, splice the two split positioning covers together with bolts, connect them on the ship main shaft, install the front split protective large cover, and clamp them in the split motor casing to obtain a module unit;

[0083] S5, repeat steps 2-4 to obtain multiple module units.

[0084] Specifically, the above-mentioned debugging method installs and debugs the alternator before leaving the factory to ensure that the alternator meets the factory requirements, comprising the following steps:

[0085] Sa1, take multiple rotor cores 11 without embedded magnetic steel 14, connect and fix them on the outside of the split rotor support 13 through the fourth mounting bolt 12 to form a split rotor without magnetic steel.

[0086] Sa2, repeat step Sa1, two split rotors without magnetic steel form a group, and multiple groups of split rotors without magnetic steel are assembled.

[0087] Sa3, connect the two split positioning covers 22 into a whole circle and connect and fix them on the factory tooling shaft 23, and then connect and fix the two front split protective large covers 21 into a whole circle in an upper and lower distribution manner and connect and fix them with the two split positioning covers 22 through the second stop.

[0088] Sa4, the left and right split stator 1 and 2 are respectively placed symmetrically on both sides of the factory tooling shaft 23 and close to the factory tooling shaft 23, the left and right split stator 1 and 2 are respectively connected with the two front split protective large cover 21 through the first stop, the first mounting bolt 8 is used to connect the left and right split stator 1 and 2 together and is fastened through the first mounting nut 7, and a complete stator is formed; the second mounting bolt 3 is used to connect the foot support 4 and the shell mounting leg 5 together and is fastened through the second mounting nut 6.

[0089] Sa5, the two non-magnetic steel split rotors are placed symmetrically on both sides of the factory tooling shaft 23, the third mounting bolt 17 is used to connect the two split rotor supports 13 and is fastened through the third mounting nut 18, a non-magnetic steel rotor is formed, and then the two split expansion sleeves 19 are pushed into the non-magnetic steel rotor and the factory tooling shaft 23, so that the inner wall of the two split expansion sleeves 19 is attached to the outer wall of the factory tooling shaft 23, and the outer wall of the two split expansion sleeves 19 is attached to the inner wall of the non-magnetic steel rotor.

[0090] Sa6, the non-magnetic steel rotor and the two split expansion sleeves 19 are pushed into the stator, the winding stator core and the rotor core 11 are aligned, and the fastening bolts on the two split expansion sleeves 19 are adjusted to make the outer diameter of the split expansion sleeve 19 have an interference fit with the inner diameter of the non-magnetic steel rotor.

[0091] Sa7, the adjusting bolt 10 is adjusted to make a slight adjustment to the stator in the radial direction, the uniformity of the air gap between the stator and the rotor is detected, and when the air gap uniformity is not greater than 2%, the adjusting bolt 10 is locked with the locking nut 9 to fix the position of the stator.

[0092] Sa8, the magnetic steel 14 is inlaid into the rotor core 11, so that the rotor has magnetism.

[0093] Sa9, the two split positioning covers 22 are removed to form a module unit, so that the generator can normally operate, the generator is tested before leaving the factory, the wiring and the inlaying direction of the magnetic steel 14 of the generator are checked, and it is ensured that the generator meets the factory requirements.

[0094] Sa10, repeat steps Sa4-Sa9 to install and debug multiple module units.

[0095] Sa11, after the installation and debugging of all the module units are completed, the fourth mounting bolt 12 of the last module is loosened, the rotor core 11 is adsorbed to the inner diameter of the stator, and the fourth mounting bolt 12 remains connected through the fourth mounting thread through hole on the split rotor support 13 and the fourth threaded hole on the rotor fixing key 16, but is not fastened.

[0096] Sa12, the third mounting bolt 17 and the third mounting nut 18 connecting the two split rotor supports 13 are removed, and the two split rotors are respectively adsorbed to the left and right split stators 1 and 2.

[0097] Sa13, loosen the lock nut 9, loosen the position limit of the stator by the adjusting bolt 10; remove the first mounting bolt 8, the first mounting nut 7, the second mounting bolt 3 and the second mounting nut 6 respectively to form the left lobe stator-rotor 24 and the right lobe stator-rotor 25.

[0098] Sa14, repeat steps Sa11-Sa13 to remove the remaining module units one by one.

[0099] Sa15, remove the two front split protection large covers 21.

[0100] A method for installing the above-mentioned distributed permanent magnet shaft-holding type shaft generator is a method for quickly installing the generator on site after the generator is installed and debugged by the above-mentioned debugging method, and includes the following steps:

[0101] Sb1, install and fix the two split positioning covers 22 on the ship main shaft 26, connect and fix the two front split protection large covers 21 into a whole circle in an up-down distribution manner, and install them together with the two split positioning covers 22 to form a positioning stopper concentric with the ship main shaft 26.

[0102] Sb2, symmetrically place the left split stator 1 and the right split stator 2 on both sides of the ship main shaft 26 and move them towards the ship main shaft 26, so that the stoppers of the left lobe stator-rotor 24 and the right lobe stator-rotor 25 are installed in cooperation with the stoppers of the front split protection large covers 21, the first bolt 8 and the first mounting nut 7 are used to fix the left lobe stator-rotor 24 and the right lobe stator-rotor 25 together, and the second mounting bolt 3 is used to connect and fasten the second mounting nut 6 through the second bolt hole on the foot support 4 and the second mounting nut 6 on the machine shell mounting leg 5.

[0103] Sb3, use the third mounting bolt 17 to pass through the third bolt hole on the two split rotor supports 13 and connect and fix the third mounting nut 18 to splice the two lobe rotor supports 13 into a whole circle; push the two split expansion sleeves 19 into the split rotors 15 and the ship main shaft 26, so that the inner walls of the two split expansion sleeves 19 fit the outer wall of the ship main shaft 26, the outer walls of the two split expansion sleeves 19 fit the inner wall of the rotor, and the fastening bolts of the two split expansion sleeves 19 are adjusted to make the outer diameter of the split expansion sleeves 19 and the inner diameter of the rotor have an interference fit; the two split expansion sleeves 19 are respectively located in the two split rotors 15.

[0104] Sb4, fasten the fourth mounting bolt 12 to make the rotor core 11 separate from the inner diameter of the stator to form an air gap.

[0105] Sb5, repeat steps Sb2-Sb4 to install multiple module units, and the adjacent surfaces of the module units fit each other.

[0106] Sb6, install the two lobe rear split protection large covers 27 and the two lobe split protection small covers 28.

[0107] A method for disassembling the above-mentioned distributed permanent magnet shaft-holding type shaft generator, quickly disassembling the module unit located in the middle and reassembling the remaining module units to ensure normal operation of the generator, the module unit including the second module unit 30 located in the middle and the first module unit 29 and the second module unit 30 located on the front and rear sides of the second module unit 30, comprising the following steps:

[0108] Sc1, when the second module unit 30 needs to be quickly separated due to failure, the rear split protection large cover 27 and the split protection small cover 28 are disassembled.

[0109] Sc2, loosen the fourth mounting bolt 12 on the second module unit 30 and the third module unit 31, so that the rotor core 11 is adsorbed to the inner diameter of the stator, the fourth mounting bolt 12 remains connected through the fourth mounting thread hole on the split rotor support 13 and the fourth threaded hole on the rotor fixing key 16, but is not fastened.

[0110] Sc3, disassemble the connecting bolt between the first module unit 29 and the second module unit 30, tighten the disassembly bolt 42 connected with the threaded hole of the shell mounting leg 5 of the third module unit 31, and axially pull out the second module unit 30 and the third module unit 31, when the first module unit 29 and the second module unit 30 are greater than the width of the connecting stop, disassemble the connecting bolt between the second module unit 30 and the third module unit 31, continue to tighten the disassembly bolt 42 connected with the threaded hole of the shell mounting leg 5 of the third module unit 31, and when the second module unit 30 and the third module unit 31 are greater than the width of the connecting stop, lift out the second module unit 30.

[0111] Sc4, disassemble the disassembly bolt 42 connected with the threaded hole of the shell mounting leg 5 of the third module unit 31, add a solid backing plate between the shell mounting leg 5 of the third module unit 31 and the stress plate 40, screw the disassembly bolt 42 into the threaded hole, push the third module unit 31 to the position of the original second module unit 30, and pause until the installation stop of the third module unit 31 and the first module unit 29 is installed in place.

[0112] Sc5, tighten the connecting bolt of the third module unit 31 and the first module unit 29.

[0113] Sc6, tighten the fourth mounting bolt 12 on the rotor of the third module unit 31, so that the rotor core 11 is separated from the inner diameter of the stator to form an air gap.

[0114] Sc7, reassemble the disassembled rear protection large cover 27 and split protection small cover 28 in place.

[0115] The split protective cover is provided with an air gap sensor and an alarm lamp, and the air gap sensor and the alarm lamp are electrically connected. When the air gap is insufficient, the air gap sensor will transmit a signal, at which time the alarm lamp will alarm. In order to accurately identify the direction of the specific air gap, four air gap sensors are installed on the split protective cover 27, and each air gap sensor is provided with one alarm lamp. The four air gap sensors are distributed in the center of the split protective cover 27 in a symmetrical manner. The inner surfaces of the positioning tables of two adjacent module units are attached to each other.

[0116] In order to ensure that the wiring of each split stator is the same, the pole-slot matching selected by us can achieve a parallel branch number greater than or equal to 2, and the uniform split can be divided into the maximum parallel branch number. The stator winding adopts high-temperature-resistant and good heat dissipation filling glue, which can improve the protection level of the motor during transportation and protect the motor winding, and also can improve the heat dissipation capacity of the motor. The stator adopts left and right split structure, the split stator is easy to hoist and install, and the stator has high universality, which can reduce the number of spare parts.

[0117] The rotor adopts a block structure, including a rotor core 11, and the number of split rotors can be a divisor of the pole pair number. The rotor core 11 and the rotor support 13 are fixed by the third mounting bolt 12, which is convenient to detach. The rotor pole quick detachment structure can ensure that the fault unit is removed within 3 hours and the other units can operate normally.

[0118] The casing foot adopts a split structure, which is composed of a foot support 4 and a casing mounting leg 5. Each split stator has a casing mounting leg 5. The split structure can reduce the maximum rotating radius of the motor, move the stress point close to the center of gravity of the motor to ensure stable installation, facilitate adjustment, and meet different center height requirements. The foot support 4 and the casing mounting leg 5 are installed and fixed by the second mounting bolt 3 and the second mounting nut 6.

[0119] After the generator is installed, there will still be a slight deviation. The adjusting bolt 10 is used for radial fine adjustment after installation. After fine adjustment, the position of the adjusting bolt 10 is locked by the locking nut 9.

[0120] The split stator is assembled by the first mounting bolt 8 and the first mounting nut 7. The axial positioning pin 20 structure is used in the middle of the two split stators to ensure the positioning requirement and reduce the installation difficulty. The distributed structure fully utilizes the installation space and reduces the requirements for on-site hoisting and transportation space. The distributed structure allows the module units to be combined arbitrarily, and the capacity of the whole machine can be increased or decreased arbitrarily. The distributed structure facilitates the removal of the fault module unit when the generator operates on the sea, adopts capacity reduction operation, and ensures the maximum utilization rate.

[0121] After the main shaft 26 and the first module unit 29 are installed, the installation steps for the second module unit 30 are the same as for the first module unit 29, and the installation methods for subsequent module units are the same. After the first module unit 29, the second module unit 30, the third module unit 31, and so on, more module units can be assembled, the split positioning cover 22 can be replaced with a split protective cover 28 to ensure the motor protection level; the junction box 33 adopts a modular design and is set on the top of the motor, allowing for easy changes to the wiring when the motor capacity is changed; four air gap sensors 32 are installed in four directions on the split protective cover 28, each with an alarm light. If the air gap is insufficient in any direction, the corresponding sensor will alarm, indicating which direction the air gap is insufficient.

[0122] The distributed structure uses external wiring between each module unit, which can be adjusted according to the ship's speed to optimize the generator output voltage and output performance.

[0123] The device of this invention adopts a modular design, which is convenient for installation and disassembly and can be combined arbitrarily; it reduces the requirements for hoisting, transportation and space; it reduces the number of spare machines; it has high applicability, high replaceability, high cost performance, and has air gap detection capability, which can provide early warning.

[0124] Example 1

[0125] A distributed permanent magnet shaft-mounted generator includes a stator, a rotor, a front split protective cover 21, a rear split protective cover 27, a split protective cover 28, and a tensioning sleeve. The stator, rotor, front split protective cover 21, rear split protective cover 27, split protective cover 28, and tensioning sleeve are of a split structure. The stator includes two split stators: a left split stator 1 and a right split stator 2. The two split stators are composed of split housings and stator cores with windings, and the two split stators are assembled into a ring shape.

[0126] The windings of the left-segmented stator 1 and the right-segmented stator 2 are encapsulated with resin with high thermal conductivity, which not only improves the heat dissipation capacity of the motor, but also ensures that the stator windings can be well protected during the transportation and installation of the motor.

[0127] The top and bottom of the split-type housing are provided with fixing plates, which are perpendicular to the ground. The fixing plates are provided with at least two first mounting bolt holes for connecting the first mounting bolt 8 in series. The tail of the first mounting bolt 8 is threaded to the first mounting nut 7. The two split-type stators are movably connected to form a stator through the first mounting bolt 8.

[0128] The lower side of the split shell is provided with a shell footing, the shell footing comprises a footing support 4 and a shell mounting leg 5, the footing support 4 is arranged below the shell mounting leg 5, the footing support 4 and the shell mounting leg 5 are provided with at least two second mounting bolt holes for connecting the second mounting bolt 3 at the same position, the tail of the second mounting bolt 3 is threadedly connected with the second mounting nut 6; the footing support 4 and the shell mounting leg 5 are connected by the second mounting bolt 3. The footing support 4 comprises a triangular support frame and a top plate and a bottom plate arranged at the top and bottom of the triangular support frame respectively.

[0129] The rotor comprises two split rotors 15 which are arranged in the split stator and are movably connected, the split rotor 15 comprises a plurality of rotor cores 11; the split rotor 15 further comprises a split rotor support 13 which is sleeved on the rotor core 11, the plurality of rotor cores 11 and the split rotor support 12 are movably connected in a semi-ring shape; the split rotor comprises a plurality of magnetic steels 14 which are embedded in the rotor core 11. The magnetic steel 14 has strong magnetism and can be adsorbed to any ferrous material.

[0130] The number of the rotor core 11 is a divisor of the number of pole pairs. The rotor core 11 has a key groove for mounting a rotor fixing key 16, and the rotor fixing key 16 is provided with a fourth threaded hole for mounting a fourth mounting bolt 12 at intervals.

[0131] The split rotor support 13 is a semi-ring structure with a hollow middle part, and the split rotor support 13 is provided with a fourth bolt through hole at intervals on the outer circumference, and the fourth mounting bolt 12 is connected to the fourth threaded hole of the rotor fixing key 16 through the fourth mounting bolt through hole.

[0132] The split rotor support 13 is provided with a third mounting bolt through hole for connecting the third mounting bolt 17 at intervals on the split plane, and the third mounting bolt 17 is connected with the third mounting nut 18 through the third bolt through hole, so as to connect the two split rotors 15 into one rotor.

[0133] The tensioning sleeve comprises two split tensioning sleeves 19 which are arranged in the split rotor 15; the split stator, the split rotor 15 and the split tensioning sleeve 19 are sequentially sleeved from outside to inside to form a semi-ring shape. The split tensioning sleeve 19 has a fastening bolt for fastening the rotor and the main shaft clamped between the two split tensioning sleeves 19.

[0134] The above structure constitutes a module unit of the distributed permanent magnet axle-holding type shaft-alternator, three module units are arranged side by side through the main shaft, and two adjacent module units are connected through connecting bolts; the module units located at two ends are respectively provided with protective covers on the outer sides, the protective covers are split structures, including two oppositely arranged split protective large covers and two oppositely arranged split protective small covers 28, the two split protective large covers are installed on the split casing through first stop openings, and the two split protective small covers 28 are connected in the split protective large covers through second stop openings, and the main shaft is clamped in the two split protective small covers 28.

[0135] Half-arc grooves for mounting axial positioning pins 20 are arranged on both sides of the fixed plate.

[0136] At least two bolt holes are arranged on the bottom plate surface of the foot support 4.

[0137] Threaded holes are arranged on the side surface of the machine base mounting leg 5, the threaded holes are used for bolt holes of the adjusting bolt 10, and the adjusting bolt 10 is provided with a locking nut 9.

[0138] First and second hard alloy sliding blocks 34 and 37 are respectively arranged between the casing mounting leg 5 and the foot support 4, and the first and second hard alloy sliding blocks 34 and 37 can be connected to the casing mounting leg 5 in an integrated manner through riveting or welding.

[0139] The first hard alloy sliding block 34 is provided with a first oil injection hole 35 and a first oil storage groove 36, the first oil storage groove 36 is used for storing lubricating oil, so that rust is not generated between the first hard alloy sliding block 34 and the foot support 4 in the case of long-term fixation of the motor, and a lubricating state is maintained, and the first oil injection hole 35 can be used for injecting lubricating oil or lubricating grease, so that the friction coefficient between the first hard alloy sliding block 34 and the foot support 4 can be reduced during the oil injection process;

[0140] The second hard alloy sliding block 37 is provided with a second oil injection hole 38 and a second oil storage groove 39, the second oil storage groove 39 is used for storing lubricating oil, so that rust is not generated between the second hard alloy sliding block 37 and the foot support 4 in the case of long-term fixation of the motor, and a lubricating state is maintained, and the second oil injection hole 38 can be used for injecting lubricating oil or lubricating grease, so that the friction coefficient between the second hard alloy sliding block 37 and the foot support 4 can be reduced during the oil injection process;

[0141] The foot supports 4 of the first and third module units 29 and 31 are respectively provided with force receiving plates 40, the force receiving plates 40 are provided with not less than two threaded holes and not less than two through holes, the threaded holes are used for mounting and dismounting bolts 42 and bolt locking nuts 41, and the through holes are used for mounting and dismounting the bolts 42 and the bolt locking nuts 41, and the casing mounting legs 5 of each module unit are provided with threaded holes for mounting and dismounting the bolts 42 and the bolt locking nuts 41.

[0142] The distributed permanent magnet axle-holding type shaft generator provided by the application is composed of multiple modular units. First, the installation difficulty is reduced according to the hoisting conditions and installation space design of most ocean-going ships. Second, the distributed structure can realize the interchange and increase or decrease of the modular units, improve the universality, adopt the modular unit standby machine during the ship sailing process, facilitate replacement and facilitate the capacity increase of the whole machine. Third, the left and right split axle-holding structure is directly installed after hoisting without rotating installation, reasonably optimizes the disassembly and assembly process, and ensures the uniformity of air gap. Fourth, it has fault tolerance and can quickly remove the faulty modular unit without affecting the normal operation of other modular units.

[0143] Embodiment 2

[0144] A debugging method of a distributed permanent magnet axle-holding type shaft generator, the generator is installed and debugged before leaving the factory to ensure that the generator meets the optimal scheme required for on-site installation after leaving the factory. The distributed permanent magnet axle-holding type shaft generator is the same as in Embodiment 1 and includes the following steps:

[0145] Step 1, use the third mounting bolt 12 to fix the rotor core 11 on the split rotor support 13, but do not embed the magnetic steel 14, to form two non-magnetic steel split rotors. At this time, the non-magnetic steel split rotors have no external magnetism.

[0146] Step 2, repeat Step 1 to assemble the non-magnetic steel split rotor combination.

[0147] Step 3, install and fix the two split positioning covers 22 on the factory delivery tool shaft 23, connect and fix the two front split protection large covers 21 into a whole circle in an up-down distribution manner, and install them together with the two split positioning covers 22 to form a positioning stopper concentric with the factory delivery tool shaft 23.

[0148] Step 4, symmetrically place the left split stator 1 and the right split stator 2 on both sides of the factory delivery tool shaft 23 and move them towards the factory delivery tool shaft 23, so that the stopper of the stator is installed in cooperation with the stopper of the front split protection large cover 21, the first mounting bolt 8 and the first mounting nut 7 are used to fix the left split stator 1 and the right split stator 2 together to form a complete stator, the second mounting bolt 3 is connected and fastened with the second mounting nut 6 through the foot support 4 and the second bolt hole on the machine shell mounting leg 5, at this time, the inner diameter of the stator can be guaranteed to be concentric with the factory delivery tool shaft 23.

[0149] Step 5, place two arbitrary non-magnetic steel split rotor symmetrically on both sides of the factory tooling shaft 23, pass the third bolt hole on the two split rotor supports 13 with the third mounting bolt 17, and connect and fix with the third mounting nut 18, and connect the two arbitrary split non-magnetic steel split rotors into a rotor; push the two split tension sleeves 19 into the installed rotor and the factory tooling shaft 23, so that the inner wall of the split tension sleeve 19 fits the outer wall of the factory tooling shaft 23, and the outer wall of the split tension sleeve 19 fits the inner wall of the rotor;

[0150] Step 6, push the tension sleeve and rotor into the stator, align the stator core and the rotor core, and adjust the fastening bolts of the two split tension sleeves 19 to make the outer diameter of the split tension sleeve 19 and the inner diameter of the rotor produce an interference fit.

[0151] Step 7, adjust the radial fine adjustment of the stator by adjusting the adjusting bolt 10, detect the uniformity of the air gap between the stator and the rotor, and until the air gap uniformity is not greater than 2%, use the locking nut 9 to lock the adjusting bolt 10, and ensure the fixation of the stator position.

[0152] Step 8, inlay the magnetic steel 14 into the rotor core 11, at this time the rotor shows obvious magnetism to the outside, and can be adsorbed to any iron object.

[0153] Step 9, remove the split positioning cover 22 to form a module unit, ensure that the motor can operate normally, and perform the factory test of the motor to test the wiring and magnetic steel inlay direction of the motor, and ensure that the motor meets the factory requirements.

[0154] Step 10, repeat steps 4~9 to install other module units.

[0155] Step 11, after all module units are installed and adjusted, loosen the fourth mounting bolt 12 of the last module, and let the rotor core 11 be adsorbed to the inner diameter of the stator, the fourth mounting bolt 12 still remains connected with the third threaded hole on the rotor fixing key through the third mounting threaded hole on the split rotor support 13, but is not fastened.

[0156] Step 12, remove the connection between the third mounting bolt 17 and the third mounting nut 18 connecting the two split rotor supports 13, at this time the two split rotors 15 are split and adsorbed to the left split stator 1 and the right split stator 2.

[0157] Step 13, loosen the locking nut 9 and adjust the position of the adjusting bolt 10 to limit the stator; remove the first mounting bolt 8, the first mounting nut 7, the second mounting bolt 3 and the second mounting nut 6 to form the left split stator 24 and the right split stator 25.

[0158] Step 14, repeat steps 11~13 to remove other module units;

[0159] Step 15, remove the two front split protection cover 21.

[0160] Among them, the debugging method of the distributed permanent magnet shaft type shaft generator, the adsorption of the stator and the rotor is the key step of the subsequent field installation.

[0161] Embodiment 3

[0162] A kind of installation method of distributed permanent magnet shaft type shaft generator, it is a kind of field fast installation method of distributed permanent magnet shaft type shaft generator, distributed permanent magnet shaft type shaft generator same as embodiment 1, before shipment, it is debugged by embodiment 2 process, including the following steps:

[0163] Step 1, install and fix two split positioning covers 22 on the ship main shaft 26, connect and fix the two front split protection covers 21 into a whole circle in the up-down distribution mode, and install them together with the two split positioning covers 22 to form a positioning stop that is concentric with the ship main shaft 26.

[0164] Step 2, place the left split stator-rotor 24 and the right split stator-rotor 25 symmetrically on both sides of the ship main shaft 26 and close to the ship main shaft 26, install the stop of the stator with the stop of the front split protection cover 21, fix the left split stator-rotor 24 and the right split stator-rotor 25 together with the first bolt 8 and the first mounting nut 7, and install and fasten the second mounting bolt 3 through the second bolt hole on the foot support 4 and the machine shell mounting leg 5 and the second mounting nut 6.

[0165] Step 3, pass the third mounting bolt 17 through the third bolt hole on the two split rotor supports 13 and connect and fix it with the third mounting nut 18 to splice the two rotor supports 13 into a whole circle, push the two split expansion sleeves 19 between the split rotors 15 and the ship main shaft 26, make the inner wall of the split expansion sleeve 19 fit the outer wall of the ship main shaft 26, make the outer wall of the split expansion sleeve 19 fit the inner wall of the rotor, and then adjust the fastening bolts of the two split expansion sleeves 19 to make the outer diameter of the split expansion sleeve 19 and the inner diameter of the rotor have an interference fit; the two split expansion sleeves 19 are located in the two split rotors respectively.

[0166] Step 4, tighten the fourth mounting bolt 12 to make the rotor core 11 separate from the inner diameter of the stator to form an air gap.

[0167] Step 5, repeat steps 2-4 to install other module units, and the adjacent surfaces of the module units fit each other.

[0168] Step 6, install the two split rear protection covers 27 and the two split small protection covers 28.

[0169] After the assembly of the multiple module units is completed, replace the split positioning cover 22 with the split small protection cover 28.

[0170] Embodiment 4

[0171] A method for disassembling a distributed permanent magnet shaft-holding type shaft generator, quickly disassembling an intermediate module on site and quickly installing the remaining modules together to ensure normal operation, comprising the following steps:

[0172] Step 1: When the second module unit 30 needs to be quickly disconnected due to failure, remove the split protection large cover 27 and the split protection small cover 28.

[0173] Step 2: Loosen the fourth installation bolt 12 on the second module unit 30 and the third module unit 31, and let the rotor core 11 be adsorbed to the inner diameter of the stator. The fourth installation bolt 12 is still connected to the fourth threaded hole on the rotor fixing key 16 through the fourth installation threaded hole on the split rotor support 13, but is not tightened.

[0174] Step 3: Remove the connecting bolt between the first module unit 29 and the second module unit 30, tighten the disassembly bolt 42 connected to the threaded hole of the shell mounting leg 5 of the third module unit 31, and axially pull out the second module unit 30 and the third module unit 31. When the width between the first module unit 29 and the second module unit 30 is greater than the connecting stop, remove the connecting bolt between the second module unit 30 and the third module unit 31, and continue to tighten the disassembly bolt 42 connected to the threaded hole of the shell mounting leg 5 of the third module unit 31. When the width between the second module unit 30 and the third module unit 31 is greater than the connecting stop, the second module unit 30 can be lifted out.

[0175] Step 4: Remove the disassembly bolt 42 connected to the threaded hole of the shell mounting leg 5 of the third module unit 31, add a solid backing plate between the shell mounting leg 5 of the third module unit 31 and the stress plate 40, and tighten the disassembly bolt 42 into the threaded hole. Push the third module unit 31 to the position of the original second module unit 30 until the installation stop of the third module unit 31 and the first module unit 29 is installed in place.

[0176] Step 5: Tighten the connecting bolt between the third module unit 31 and the first module unit 29.

[0177] Step 6: Tighten the fourth installation bolt 12 on the rotor of the third module unit 31, so that the rotor core 11 is separated from the inner diameter of the stator to form an air gap.

[0178] Step 7: Reinstall the removed split protection large cover 27 and split protection small cover 28 in place.

[0179] The method can quickly remove the middle module, and after the remaining modules are assembled, the remaining modules can be used for capacity reduction.

[0180] The above is only the preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change within the technical range disclosed by the present application according to the technical solution and the inventive concept of the present application, which should be covered in the protection scope of the present application.

Claims

1. A distributed permanent magnet shaft-hugging type shaft generator, comprising a module unit, the module unit comprising a stator, a rotor and a tension sleeve, the rotor being arranged in the stator, the tension sleeve being arranged in the rotor, the stator, rotor and tension sleeve being split structure and coaxially arranged, characterized in that, the stator comprises two split stators arranged opposite to each other, the split stators are fixed in split housings, and each is provided with a winding stator core; the upper and lower ends of the two split housings are connected by first mounting bolts (8), and the tail of the first mounting bolt (8) is screwed with a first mounting nut (7); the lower side of the split stator is provided with a housing footing, the housing footing comprises a footing support (4) and a housing mounting leg (5), the footing support (4) is located at the bottom of the housing mounting leg (5), and the footing support (4) and the housing mounting leg (5) are connected by a second mounting bolt (3), and the tail of the second mounting bolt (3) is screwed with a second mounting nut (6); the rotor comprises two split rotors (15) arranged opposite to each other, the split rotor (15) comprises a plurality of rotor cores (11) and a split rotor support (13), a plurality of the rotor cores (11) are connected in sequence and arranged outside the split rotor support (13), and a plurality of magnetic steels (14) are embedded side by side inside the rotor core (11) close to the split stator; the split rotor support (13) is a semi-ring structure with a hollow middle part, two split rotor supports (13) are connected by a third mounting bolt (17), and the tail of the third mounting bolt (17) is screwed with a third mounting nut (18); the split rotor support (13) and the plurality of rotor cores (11) are connected by a fourth mounting bolt (12) respectively; the tension sleeve comprises two split tension sleeves (19) arranged opposite to each other, the split tension sleeve (19) has a fastening bolt for fastening the rotor and the main shaft clamped between the two split tension sleeves (19); at least two module units are connected in series on the main shaft and arranged side by side, and two adjacent module units are connected by connecting bolts; the module units at both ends are respectively provided with protective covers on the outer side, the protective covers are split structure, the protective covers comprise two split large protective covers arranged opposite to each other and two split small protective covers (28) arranged opposite to each other, the two split large protective covers are mounted on the split housing by a first stop opening, and the two split small protective covers (28) are connected in the split large protective cover by a second stop opening, and the main shaft is clamped between the two split small protective covers (28). The first end face is provided with a first oil injection channel communicated with the first oil injection hole (35); and the bottom of the machine shell mounting leg (5) is provided with a second oil injection channel communicated with the second oil injection hole (38).

2. The distributed permanent magnet shaft-hugging type shaft-alignment generator according to claim 1, characterized by, The rotor iron core (11) is provided with a key groove close to the split rotor support (13), and a rotor fixing key (16) is embedded in the key groove and screwed with the fourth mounting bolt (12).

3. The distributed permanent magnet motor generator of claim 1, wherein, Two axial positioning pins (20) are mounted on both sides of the upper and lower end abutments of the two split machine shells along the direction of the main shaft.

4. The distributed permanent magnet motor generator of claim 1, wherein, The first end face is provided with a first oil injection channel communicated with the first oil injection hole (35); and the bottom of the machine shell mounting leg (5) is provided with a second oil injection channel communicated with the second oil injection hole (38).

5. The distributed permanent magnet motor generator of claim 4, wherein, The first end face has a bolt through hole, and an adjusting bolt (10) with a locking nut (9) is mounted in the bolt through hole, and the bottom end of the adjusting bolt (10) abuts against the foot support (4).

6. The distributed permanent magnet motor generator of claim 1, wherein, The machine shell mounting leg (5) is provided with a force receiving plate (40) on both sides along the direction of the main shaft, and the force receiving plate (40) is connected with the machine shell mounting leg (5) through a mounting and dismounting bolt (42) with a dismounting bolt locking nut (41).

7. A method of commissioning a distributed permanent magnet shaft-holding type shaft-alignment generator according to any one of claims 1 to 6, characterized in that, The generator is installed and debugged before leaving the factory to ensure that the generator meets the factory requirements, including the following steps: Sa1, a plurality of rotor iron cores (11) without embedded magnetic steel (14) are connected in series and fixed on the outside of the split rotor support (13) through the fourth mounting bolt (12) to form a split rotor without magnetic steel; Sa2, repeat step Sa1, two split rotors without magnetic steel are a group, and a plurality of groups of split rotors without magnetic steel are assembled; Sa3, connect two split positioning covers (22) into a whole circle and connect and fix them on the factory tool shaft (23), then connect and fix two front split protection large covers (21) into a whole circle in an upper and lower distribution manner and connect and fix them with the two split positioning covers (22) through the second stop opening. Sa4, respectively, the left split stator (1) and the right split stator (2) are symmetrically placed on both sides of the factory tool shaft (23) and are close to the factory tool shaft (23), the left split stator (1) and the right split stator (2) are connected by the first stop and two front split protective covers (21) are connected, the first mounting bolt (8) is used to connect the left split stator (1) and the right split stator (2) together and is fastened by the first mounting nut (7), forming a complete stator; the second mounting bolt (3) is used to connect the foot support (4) and the casing mounting leg (5) together and is fastened by the second mounting nut (6); Sa5, two non-magnetic steel split rotors are symmetrically placed on both sides of the factory tool shaft (23), the third mounting bolt (17) is used to connect the two split rotor supports (13) and is fastened by the third mounting nut (18), forming a non-magnetic steel rotor, and then the two split expansion sleeves (19) are pushed into the non-magnetic steel rotor and the factory tool shaft (23), so that the inner wall of the two split expansion sleeves (19) is attached to the outer wall of the factory tool shaft (23), and the outer wall of the two split expansion sleeves (19) is attached to the inner wall of the non-magnetic steel rotor; Sa6, the non-magnetic steel rotor and the two split expansion sleeves (19) are pushed into the stator, the winding stator core and the rotor core (11) are aligned, and the fastening bolts on the two split expansion sleeves (19) are adjusted to make the outer diameter of the split expansion sleeve (19) and the inner diameter of the non-magnetic steel rotor have an interference fit; Sa7, adjust the adjusting bolt (10) to make a slight adjustment to the stator in the radial direction, and detect the uniformity of the air gap between the stator and the rotor, when the air gap uniformity is not greater than 2%, the adjusting bolt (10) is locked by the locking nut (9), so that the position of the stator is fixed; Sa8, the magnetic steel (14) is embedded into the rotor core (11), so that the rotor has magnetism; Sa9, the two split positioning covers (22) are removed, forming a module unit, so that the generator can operate normally, the generator is tested before leaving the factory, the wiring and the embedding direction of the magnetic steel (14) of the generator are checked, and it is ensured that the generator meets the requirements of leaving the factory; Sa10, repeat steps Sa4~Sa9, install and debug multiple module units; Sa11, after the installation and debugging of all module units are completed, loosen the fourth mounting bolt (12) of the last module, so that the rotor core (11) is adsorbed to the inner diameter of the stator, and the fourth mounting bolt (12) remains connected through the fourth mounting thread through hole on the split rotor support (13) and the fourth threaded hole on the rotor fixing key (16), but is not fastened; Sa12, remove the third mounting bolt (17) and the third mounting nut (18) connecting the two split rotor supports (13), and the two split rotors are respectively adsorbed to the left split stator (1) and the right split stator (2); Sa13, loosen the locking nut (9) and adjust the position of the adjusting bolt (10) to limit the stator; remove the first mounting bolt (8), the first mounting nut (7), the second mounting bolt (3) and the second mounting nut (6) respectively, forming a left split stator-rotor (24) and a right split stator-rotor (25). Sa14, repeat steps Sa11~Sa13, remove the remaining module units one by one; Sa15, remove two front split protection large covers (21).

8. A method of installing a distributed permanent magnet shaft-hugging type shaft-alignment generator according to any one of claims 1 to 6, characterized in that, Comprising the following steps: Sb1, install and fix two split positioning covers (22) on the ship main shaft (26), connect and fix two front split protection large covers (21) into a whole circle in an up-down distribution manner, and install them together with two split positioning covers (22) respectively to form a second stop opening concentric with the ship main shaft (26); Sb2, place left split stator (1) and right split stator (2) symmetrically on both sides of the ship main shaft (26) and close to the ship main shaft (26), install left split rotor (24) and right split rotor (25) with the first stop opening of the front split protection large cover (21), and fix left split rotor (24) and right split rotor (25) together with first mounting bolt (8) and first mounting nut (7); connect and fasten second mounting bolt (3) with second mounting nut (6) through second bolt hole on foot support (4) and machine shell mounting leg (5); Sb3, connect and fix third mounting bolt (17) with third mounting nut (18) through third bolt hole on two split rotor supports (13), and splice two rotor supports (13) into a whole circle; push two split expansion sleeves (19) into split rotor (15) and ship main shaft (26) to make the inner wall of two split expansion sleeves (19) fit the outer wall of ship main shaft (26), make the outer wall of two split expansion sleeves (19) fit the inner wall of rotor, and then adjust the fastening bolts of two split expansion sleeves (19) to make the outer diameter of split expansion sleeve (19) have interference fit with the inner diameter of rotor; two split expansion sleeves (19) are located in two split rotors (15) respectively; Sb4, tighten fourth mounting bolt (12) to make rotor core (11) separate from the inner diameter of stator to form air gap; Sb5, repeat steps Sb2~Sb4 to install multiple module units, and make the adjacent surfaces of each module unit fit each other; Sb6, install two rear split protection large covers (27) and two split protection small covers (28).

9. A method of disassembling the distributed permanent magnet shaft-holding type shaft- driven generator according to any one of claims 1 to 6, characterized in that, Quickly remove the module unit located in the middle and reassemble the remaining module units to ensure the normal operation of the generator. The module units include the second module unit (30) located in the middle, and the first module unit (29) and the third module unit (31) located on the front and rear sides of the second module unit (30) respectively, comprising the following steps: Sc1, when the second module unit (30) needs to be quickly removed due to failure, remove the rear split protection large cover (27) and the split protection small cover (28); Sc2, loosen the fourth mounting bolt (12) on the second module unit (30) and the third module unit (31) to make the rotor core (11) adsorb to the inner diameter of the stator, and the fourth mounting bolt (12) remains connected with the fourth threaded hole on the rotor fixing key (16) through the fourth mounting threaded hole on the split rotor support (13), but is not fastened; Sc3, remove the connecting bolt between the first module unit (29) and the second module unit (30), tighten the removal bolt (42) connected with the threaded hole of the cabinet mounting leg (5) of the third module unit (31), pull the second module unit (30) and the third module unit (31) axially out, when the distance between the first module unit (29) and the second module unit (30) is greater than the width of the connecting stop, remove the connecting bolt between the second module unit (30) and the third module unit (31), continue to tighten the removal bolt (42) connected with the threaded hole of the cabinet mounting leg (5) of the third module unit (31), when the distance between the second module unit (30) and the third module unit (31) is greater than the width of the connecting stop, lift out the second module unit (30); Sc4, remove the removal bolt (42) connected with the threaded hole of the cabinet mounting leg (5) of the third module unit (31), add a solid backing plate between the cabinet mounting leg (5) of the third module unit (31) and the stress plate (40), tighten the removal bolt (42) into the threaded hole, push the third module unit (31) to the position of the original second module unit (30), and pause until the third module unit (31) is installed with the installation stop of the first module unit (29); Sc5, tighten the connecting bolt of the third module unit (31) and the first module unit (29); Sc6, tighten the fourth mounting bolt (12) on the rotor of the third module unit (31), so that the rotor core (11) is separated from the inner diameter of the stator, forming an air gap; Sc7, reinstall the removed rear split protective large cover (27) and split protective small cover (28) in place.

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