Energy-saving permanent magnet motor for electric tug

Abstract

The invention relates to the technical field of permanent magnet motors, and discloses an energy-saving permanent magnet motor for an electric tug, which comprises a permanent magnet motor body, and a motor bracket is arranged at the bottom of the permanent magnet motor body; the air cooling heat dissipation mechanism is located on one side of the permanent magnet motor body; and the water-cooling heat dissipation mechanism is located outside the permanent magnet motor body. According to the energy-saving permanent magnet motor for the electric tug, the connecting rotating shaft connected with the reduction gear is connected with the cooling fan, redundant power of the reduction gear can be recycled conveniently, the air velocity can be increased, and the air-cooling heat dissipation effect is achieved; most of particulate matters in external water are filtered through the filter holes of the interception mesh drawer, and a small amount of suspended matters are filtered through the filter water core, so that external cold water is conveniently utilized to carry out water-cooling heat dissipation on the permanent magnet motor body, effective utilization of resources is realized, the cold water is continuously circulated, and the heat dissipation effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motors, in particular to an energy-saving permanent magnet motor for an electric tugboat. Background Art

[0002] Electric tugboats, also known as tugboats, are mainly used to tow ships that are not self-propulsive or to rescue ships in distress at sea. The propulsion device of a tugboat is the part of the tugboat that provides thrust and power. The permanent magnet motor is an indispensable device for the propulsion device of a tugboat. The permanent magnet motor is an electric motor whose core feature is the use of permanent magnets to generate a magnetic field, thereby simplifying the motor design and improving efficiency. The main components of a permanent magnet motor include permanent magnets as part of the rotor or stator, and three-phase winding as another part of the motor. The advantages of permanent magnet motors include high power density, high control accuracy, low noise, high efficiency, etc.

[0003] In the prior art, such as the "A water-cooled heat dissipation structure for a permanent magnet motor" with Chinese authorization announcement number CN119154583A, it includes a motor housing, a heat dissipation mechanism is provided on the motor housing; a fixing mechanism and a mounting mechanism are installed on the motor housing; two filtering mechanisms are symmetrically fixed on the motor housing; a fixing block is installed on the filtering mechanism; a driving mechanism is rotated on the fixing block; a clamping mechanism is fixed on the driving mechanism; through the fixing mechanism and the filtering mechanism, the motor housing can be installed on the motor by a tool; the water pipe is inserted into the fixing block, and the driving mechanism is rotated using a tool to drive the clamping mechanism to move, and the clamping mechanism fixes the water pipe, so that the water can be filtered by the filtering mechanism and then discharged into the motor housing; the water used for heat dissipation can flow into the heat dissipation mechanism through the filtering mechanism, and when the motor is in use, the heat dissipation mechanism dissipates heat from the motor housing.

[0004] In the above patent, although the heat dissipation of the motor housing can be carried out by the heat dissipation mechanism in conjunction with the filtering mechanism, the heat dissipation system is not complete if it relies solely on water cooling. The long-term high-speed rotation of the motor rotor will also generate heat, and the speed of the motor rotor is not stable enough, which affects the power transmission. In addition, water cooling is not convenient to use external water resources, which affects the flexibility of use. Therefore, there is an urgent need for an energy-saving permanent magnet motor for electric tugboats. Summary of the Invention

[0005] The object of the present invention is to provide an energy-saving permanent magnet motor for an electric tugboat, so as to solve the problems proposed in the above background technology that heat dissipation relies solely on water cooling, the heat dissipation system is not complete, the long-term high-speed rotation of the motor rotor will also generate heat, and the motor rotor speed is not stable enough, which affects power transmission, and water cooling is inconvenient to use external water resources, which affects the flexibility of use.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: an energy-saving permanent magnet motor for an electric tugboat, comprising: A permanent magnet motor body, wherein a motor bracket is provided at the bottom of the permanent magnet motor body; An air-cooling heat dissipation mechanism is located on one side of the permanent magnet motor body, the air-cooling heat dissipation mechanism includes a fixed outer ring, a motor shaft is provided inside the fixed outer ring, a transmission gear is provided outside the motor shaft, three reduction gears are meshed and connected to the outside of the transmission gear, the reduction gears are rotatably connected to the outer wall of one side of the permanent magnet motor body via a connecting shaft, and a cooling fan is provided at one end of the connecting shaft; The water-cooling heat dissipation mechanism is located outside the permanent magnet motor body. The water-cooling heat dissipation mechanism includes a heat dissipation component and a filter component. The heat dissipation component includes heat dissipation fins. The outer parts of the heat dissipation fins are respectively connected with a first water tank and a second water tank.

[0007] As a preferred technical solution of the present invention, a first ventilation opening is provided on the fixed outer ring, an internal thread is provided on the inner wall of the fixed outer ring, a threaded inner shell adapted to the internal thread is threadedly connected to the inner wall of the fixed outer ring, a second ventilation opening connected to the first ventilation opening is provided on the threaded inner shell, and a rotating handle distributed in a ring is provided on one side outer wall of the threaded inner shell.

[0008] As a preferred technical solution of the present invention, the outer wall of the fixed outer ring is provided with an external thread, the external thread of the fixed outer ring is connected with a threaded clamping ring that is compatible with the external thread, rotating protrusions are evenly provided on the outer periphery of one side of the threaded clamping ring, and a dust filter is provided on the inner wall of the other side of the threaded clamping ring.

[0009] As a preferred technical solution of the present invention, fixed support plates are symmetrically arranged on both sides of the first water tank and the second water tank, a clamping block is arranged on the top of the fixed support plate located on one side of the second water tank, and a clamping groove adapted to the clamping block is provided on the fixed support plate on one side of the first water tank, and communicating water pipes are symmetrically arranged on both sides of the first water tank and the second water tank, wherein the two water pipes are connected to each other by setting a connecting water pipe.

[0010] As a preferred technical solution of the present invention, the filtration assembly includes a circulating water tank, a middle inner wall of the circulating water tank is provided with a thermal insulation plate, connected water inlet pipes are symmetrically provided on both sides of the circulating water tank, and connected drainage pipes are symmetrically provided on both sides of the circulating water tank, and water pumps are respectively provided on the water inlet pipe and the drainage pipe.

[0011] As a preferred technical solution of the present invention, a sealing cover is provided on the top of the circulating water tank, a double-layer sealing gasket is provided on the bottom of the sealing cover, a water filter core is provided on the inner wall of one side of the circulating water tank, and a retention net is provided on the inner wall of the other side of the circulating water tank.

[0012] As a preferred technical solution of the present invention, a first handle is provided on the top of the water filter core, a second handle is provided on the top of the interception net drawer, a fixed bracket is provided at the bottom of the circulating water tank, a fixed bottom plate is provided at the bottom of the fixed bracket, and the fixed bottom plate is provided at the bottom of one side of the motor bracket.

[0013] As a preferred technical solution of the present invention, the threaded inner shell is provided with a mounting hole adapted to the motor shaft, and the periphery of the mounting hole is provided with a heat dissipation opening adapted to the heat dissipation fan.

[0014] As a preferred technical solution of the present invention, the first water tank and the second water tank are symmetrically distributed, and the first water tank and the second water tank are respectively provided with connecting slots adapted to the heat dissipation fins.

[0015] As a preferred technical solution of the present invention, the heat dissipation fins are distributed in a ring shape, and the heat dissipation through holes are provided on the heat dissipation fins in a linear distribution.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The electric tugboat uses an energy-saving permanent magnet motor. The meshing of the transmission gear and the reduction gear facilitates improving the stability of the rotor rotation inside the permanent magnet motor body, thereby improving the stability of power transmission. The long-term rotation friction of the motor shaft is likely to generate heat. The connecting shaft connected to the reduction gear is connected to the cooling fan, which facilitates the recycling of excess power from the reduction gear, speeds up the air flow rate, and rapidly diffuses and exchanges heat generated by the motor shaft, thereby achieving the effect of air cooling and heat dissipation. The fixed outer ring is covered by a dust filter outside the first ventilation opening and the second ventilation opening, which facilitates filtering dust from the air intake. If too much dust accumulates, the fixed outer ring can be removed to clean the dust filter. 2. The electric tugboat uses an energy-saving permanent magnet motor. The permanent magnet motor body can conduct heat dissipation to dissipate the heat generated by the permanent magnet through external heat dissipation fins. The heat dissipation holes can further improve the heat dissipation effect, improve the magnetism of the permanent magnet, and extend the service life of the permanent magnet. The first water tank and the second water tank are semi-circular hollow shapes and are fixed to the plurality of heat dissipation fins through connecting slots. The circulating water tank draws in the river and lake water outside the electric tugboat. The external water passes through the filter holes of the intercepting net to filter out most of the particulate matter. A small amount of suspended matter is filtered through the filter core, and impurities are trapped inside the intercepting net, which is convenient for reducing the situation where suspended matter clogs the pipeline. 3. The electric tugboat uses an energy-saving permanent magnet motor. The water inlet pipe is connected to the water pipe on one side of the first water tank. The water pipe on the other side of the first water tank is connected to the water pipe on the other side of the second water tank through a connecting water pipe. The water pipe on one side of the second water tank is connected to the drain pipe, which can realize the circulation of cold water. The drain pipe cooperates with the water pump to discharge the heat exchanged water directly into rivers, lakes and seas, so that the permanent magnet motor body can be cooled and dissipated by external cold water, thereby realizing the effective use of resources. In addition, the cold water circulates continuously, and the heat dissipation effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of an energy-saving permanent magnet motor for an electric tugboat according to one embodiment of the present invention; Figure 2 A schematic side view of the structure of an energy-saving permanent magnet motor for an electric tugboat according to one embodiment of the present invention; Figure 3 A schematic diagram of a partial structure of an energy-saving permanent magnet motor for an electric tugboat according to one embodiment of the present invention; Figure 4 A schematic partial cross-sectional view of an energy-saving permanent magnet motor for an electric tugboat according to one embodiment of the present invention; Figure 5 A schematic diagram of a partial structure of an air-cooling heat dissipation mechanism of an energy-saving permanent magnet motor for an electric tugboat according to one embodiment of the present invention; Figure 6 A schematic diagram of a partially exploded structure of an air-cooling heat dissipation mechanism of an energy-saving permanent magnet motor for an electric tugboat according to one embodiment of the present invention; Figure 7 Schematic diagram of the exploded structure of a heat dissipation assembly of an energy-saving permanent magnet motor for an electric tugboat in one embodiment of the present invention; Figure 8 The present invention is a partial structural diagram of a filter assembly of an energy-saving permanent magnet motor for an electric tugboat according to one embodiment of the present invention.

[0018] In the picture: 1. Permanent magnet motor body; 2. Motor bracket; 3. Air-cooled heat dissipation mechanism; 301. Fixed outer ring; 302. First ventilation opening; 303. Internal thread; 304. Threaded inner shell; 305. Second ventilation opening; 306. Rotating handle; 307. Motor shaft; 308. Transmission gear; 309. Reduction gear; 310. Connecting shaft; 311. Cooling fan; 312. Mounting hole; 313. Heat dissipation opening; 314. External thread; 315. Threaded retaining ring; 316. Rotating bump; 317. Dust filter; 4. Water-cooled heat dissipation mechanism; 41. Heat dissipation assembly; 411. Heat dissipation fins; 412. Heat dissipation holes; 413. First water tank; 414. Second water tank; 415. Connecting slot; 416. Fixed support plate; 417. Snap-in block; 418. Snap-in slot; 419. Water guide pipe; 420. Connecting water pipe; 42. Filter assembly; 421. Circulating water tank; 422. Insulation board; 423. Water inlet pipe; 424. Drain pipe; 425. Water pump; 426. Sealing cover; 427. Sealing gasket; 428. Water filter core; 429. First handle; 430. Retaining net drawer; 431. Second handle; 432. Fixed bracket; 433. Fixed bottom plate. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figures 1-8 The present invention provides a technical solution: an energy-saving permanent magnet motor for an electric tugboat, comprising a permanent magnet motor body 1, a motor bracket 2 being provided at the bottom of the permanent magnet motor body 1, an air cooling and heat dissipation mechanism 3 being located on one side of the permanent magnet motor body 1, the air cooling and heat dissipation mechanism 3 comprising a fixed outer ring 301, a motor shaft 307 being provided inside the fixed outer ring 301, a transmission gear 308 being provided outside the motor shaft 307, three reduction gears 309 being meshed and connected to the outside of the transmission gear 308, and the reduction gear 309 A connecting shaft 310 is provided for rotational connection with an outer wall of one side of the permanent magnet motor body 1. A cooling fan 311 is provided at one end of the connecting shaft 310. A first ventilation opening 302 is provided on the fixed outer ring 301. A second ventilation opening 305 communicating with the first ventilation opening 302 is provided on the threaded inner shell 304. A heat dissipation opening 313 adapted to the cooling fan 311 is provided on the periphery of the mounting hole 312. A mounting hole 312 adapted to the motor shaft 307 is provided on the threaded inner shell 304.

[0021] The motor bracket 2 is convenient for supporting and fixing the permanent magnet motor body 1. The motor bracket 2 is convenient for being installed on the electric tugboat by bolts. The motor shaft 307 is connected to the motor rotor for power transmission. The transmission gear 308 is engaged with the reduction gear 309 to facilitate the stability of the rotor rotation inside the permanent magnet motor body 1, thereby improving the stability of power transmission. The long-term rotation friction of the motor shaft 307 is likely to generate heat. The connecting shaft 310 connected to the reduction gear 309 is connected to the cooling fan 311, which is convenient for recycling the excess power of the reduction gear 309, and can speed up the air flow rate, thereby quickly diffusing and exchanging the heat generated by the motor shaft 307, thereby achieving the effect of air cooling and heat dissipation. The first ventilation opening 302 and the second ventilation opening 305 cooperate with the heat dissipation opening 313 to facilitate air circulation inside the threaded inner shell 304, and to protect the installation of the transmission gear 308 and the reduction gear 309.

[0022] The inner wall of the fixed outer ring 301 is provided with an internal thread 303, and the inner wall of the fixed outer ring 301 is threadedly connected to a threaded inner shell 304 that is compatible with the internal thread 303. The outer wall of one side of the threaded inner shell 304 is provided with a rotating handle 306 distributed in a ring shape, and the outer wall of the fixed outer ring 301 is provided with an external thread 314. The external thread of the fixed outer ring 301 is connected to a threaded clamping ring 315 that is compatible with the external thread 314. Rotating protrusions 316 are evenly arranged on the outer periphery of one side of the threaded clamping ring 315, and a dust filter 317 is provided on the inner wall of the other side of the threaded clamping ring 315.

[0023] The fixed outer ring 301 is conveniently connected and fixed to the threaded inner shell 304 through the internal thread 303, and the threaded inner shell 304 can be manually tightened by rotating the handle 306. The fixed outer ring 301 is conveniently connected and fixed to the fixed outer ring 301 through the external thread 314, and the fixed outer ring 301 can be manually tightened by rotating the protrusion 316. A limiting baffle is provided on the permanent magnet motor body 1 to facilitate limiting the threaded inner shell 304 and the fixed outer ring 301. The fixed outer ring 301 is covered on the outside of the first ventilation opening 302 and the second ventilation opening 305 by the dust filter 317, which is convenient for filtering dust in the air intake part. If too much dust accumulates, the fixed outer ring 301 can be removed to clean the dust filter 317, which is convenient for long-term use and improves the filtering effect.

[0024] The water-cooling heat dissipation mechanism 4 is located outside the permanent magnet motor body 1. The water-cooling heat dissipation mechanism 4 includes a heat dissipation component 41 and a filter component 42. The heat dissipation component 41 includes heat dissipation fins 411. The heat dissipation fins 411 are distributed in a ring shape. The heat dissipation fins 411 are provided with heat dissipation holes 412 distributed linearly. The external clamping of the heat dissipation fins 411 are respectively clamped with a first water tank 413 and a second water tank 414. The first water tank 413 and the second water tank 414 are symmetrically distributed. The first water tank 413 and the second water tank 414 are respectively provided with connecting slots 415 adapted to the heat dissipation fins 411. Fixed support plates 416 are symmetrically provided on both sides of the first water tank 413 and the second water tank 414. A clamping block 417 is provided on the top of the fixed support plate 416 located on one side of the second water tank 414. A clamping groove 418 adapted to the clamping block 417 is opened on the fixed support plate 416 located on one side of the first water tank 413.

[0025] The permanent magnet motor body 1 can conduct heat dissipation to the heat generated by the permanent magnet through the external heat dissipation fins 411. The heat dissipation holes 412 facilitate further improving the heat dissipation effect, improving the magnetism of the permanent magnet, and extending the service life of the permanent magnet. The first water tank 413 and the second water tank 414 are semicircular hollow shapes, and are fixed by connecting the card slots 415 and multiple heat dissipation fins 411. The first water tank 413 and the second water tank 414 are slidingly connected by setting a card block 417 and a card slot 418. The motor bracket 2 can be removed to facilitate the installation of the first water tank 413 and the second water tank 414. The upper and lower fixed support plates 416 are connected by bolts to facilitate further installation and fixation of the first water tank 413 and the second water tank 414.

[0026] The first water tank 413 and the second water tank 414 are symmetrically provided with communicating water pipes 419 on both sides, wherein the two water pipes 419 are connected to each other by providing a connecting water pipe 420. The filter assembly 42 includes a circulating water tank 421, the middle inner wall of which is provided with a heat insulation plate 422, the circulating water tank 421 is symmetrically provided with communicating water inlet pipes 423 on both sides, the circulating water tank 421 is symmetrically provided with communicating drainage pipes 424 on both sides, the water inlet pipes 423 and the drainage pipes 424 are respectively provided with water pumps 425, and the top of the circulating water tank 421 is provided with a A sealing cover plate 426 is provided, a double-layer sealing gasket 427 is provided at the bottom of the sealing cover plate 426, a filter water core 428 is provided on the inner wall of one side of the circulating water tank 421, a retention net drawer 430 is provided on the inner wall of the other side of the circulating water tank 421, a first handle 429 is provided on the top of the filter water core 428, a second handle 431 is provided on the top of the retention net drawer 430, a fixed bracket 432 is provided at the bottom of the circulating water tank 421, a fixed bottom plate 433 is provided at the bottom of the fixed bracket 432, and the fixed bottom plate 433 is provided at the bottom of one side of the motor bracket 2.

[0027] The circulating water tank 421 is supported and fixed on the fixed bottom plate 433 by a fixed bracket 432. The water inlet pipe 423 is connected to the extended water pipe through a flange. The river and lake sea water outside the electric tugboat is sucked into the circulating water tank 421 through the water pump 425. The inlet and outlet water are separated by the insulation plate 422. The water inlet is above the insulation plate 422 and the water outlet is below the insulation plate 422. The external water passes through the filter holes of the intercepting net drawer 430 to filter out most of the particulate matter, and a small amount of suspended matter is filtered through the filter core 428. The impurities are trapped inside the intercepting net drawer 430, which is convenient for reducing the situation of suspended matter clogging the pipeline. The sealing cover 426 is fixed to the top of the circulating water tank 421 by bolts in conjunction with the double-layer sealing gasket 427. The double-layer sealing gasket 427 can improve the sealing effect, facilitate opening the circulating water tank 421, replace the filter core 428 through the first handle 429, and the second handle 431 makes it convenient to lift the intercepting net drawer 430 for cleaning. In order to maintain the filtering effect, the water inlet pipe 423 on the other side is connected to the water pipe 419 on one side of the first water tank 413 to introduce cold water into the first water tank 413. The water pipe 419 on the other side of the first water tank 413 is connected to the water pipe 419 on the other side of the second water tank 414 through the connecting water pipe 420, which is convenient for introducing cold water into the second water tank 414. The water pipe 419 on one side of the second water tank 414 is connected to the drain pipe 424 to realize the circulation of cold water. The drain pipe 424 is introduced into the bottom of the circulating water tank 421 through the water pump 425, wherein the insulation plate 422 is convenient for blocking heat and reducing the conduction of heat to the cold water. The heat exchanged water is then discharged through the drain pipe 424 on the other side in conjunction with the water pump 425. The drain pipe 424 is connected to the extended water pipe through a flange, which is convenient for discharging the water directly into rivers, lakes and seas, so as to facilitate the use of external cold water for water cooling and heat dissipation of the permanent magnet motor body 1, thereby realizing the effective utilization of resources, and the cold water is continuously circulated, and the heat dissipation effect is better.

[0028] Working principle: The engagement of the transmission gear 308 and the reduction gear 309 is convenient for improving the stability of the rotation of the rotor inside the permanent magnet motor body 1, thereby improving the stability of power transmission. The long-term rotation friction of the motor shaft 307 is likely to generate heat. The connecting shaft 310 connected to the reduction gear 309 is connected to the cooling fan 311, which is convenient for recycling the excess power of the reduction gear 309, and can speed up the air flow rate, thereby quickly diffusing and exchanging the heat generated by the motor shaft 307, thereby achieving the effect of air cooling and heat dissipation. The fixed outer ring 301 is covered by the dust filter 317 on the outside of the first ventilation opening 302 and the second ventilation opening 305, so as to filter the dust in the air intake part. If too much dust accumulates, the fixed outer ring 301 can be removed to clean the dust filter 317. The permanent magnet motor body 1 can dissipate the heat generated by the permanent magnet through the external heat dissipation fins 411. The heat dissipation through-hole 412 is convenient for further improving the heat dissipation effect, improving the magnetic properties of the permanent magnet, and extending the service life of the permanent magnet. The first water tank 413 and the second water tank 414 are semicircular hollow shapes, which are fixed by connecting the card slot 415 and the plurality of heat dissipation fins 411. The circulating water tank 421 absorbs the river and lake water outside the electric tugboat, and the external water is filtered out of most of the particulate matter through the filter holes of the intercepting net drawer 430. A small amount of suspended matter is filtered through the filter water core 428, and impurities are trapped inside the intercepting net drawer 430, which is convenient for reducing the situation of suspended matter clogging the pipeline. The water inlet pipe 423 is connected to the side of the first water tank 413. The water pipe 419 is connected, and the water pipe 419 on the other side of the first water tank 413 is connected to the water pipe 419 on the other side of the second water tank 414 through the connecting water pipe 420. The water pipe 419 on one side of the second water tank 414 is connected to the drain pipe 424, which can realize the circulation of cold water. The drain pipe 424 cooperates with the water pump 425 to discharge the heat exchanged water directly into rivers, lakes and seas, so as to facilitate the use of external cold water to water-cool the permanent magnet motor body 1, thereby realizing the effective use of resources, and the cold water is continuously circulated, and the heat dissipation effect is better.

[0029] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. An energy-saving permanent magnet motor for an electric tugboat, characterized in that: include: A permanent magnet motor body (1), wherein a motor bracket (2) is provided at the bottom of the permanent magnet motor body (1); An air-cooling heat dissipation mechanism (3) is located on one side of the permanent magnet motor body (1), the air-cooling heat dissipation mechanism (3) comprises a fixed outer ring (301), a motor shaft (307) is provided inside the fixed outer ring (301), a transmission gear (308) is provided outside the motor shaft (307), three reduction gears (309) are meshedly connected to the outside of the transmission gear (308), the reduction gears (309) are rotatably connected to the outer wall of one side of the permanent magnet motor body (1) by providing a connecting shaft (310), and a cooling fan (311) is provided at one end of the connecting shaft (310); A water-cooling heat dissipation mechanism (4) is located outside the permanent magnet motor body (1), the water-cooling heat dissipation mechanism (4) comprising a heat dissipation component (41) and a filter component (42), the heat dissipation component (41) comprising heat dissipation fins (411), and the outer portions of the heat dissipation fins (411) are respectively connected to a first water tank (413) and a second water tank (414); The filter assembly (42) comprises a circulating water tank (421), a middle inner wall of the circulating water tank (421) is provided with a temperature insulating plate (422), two sides of the circulating water tank (421) are symmetrically provided with communicating water inlet pipes (423), two sides of the circulating water tank (421) are symmetrically provided with communicating drainage pipes (424), and the water inlet pipes (423) and drainage pipes (424) are respectively provided with water pumps (425).

2. The energy-saving permanent magnet motor for an electric tugboat according to claim 1, characterized in that: The fixed outer ring (301) is provided with a first ventilation opening (302), the inner wall of the fixed outer ring (301) is provided with an internal thread (303), the inner wall of the fixed outer ring (301) is threadedly connected to a threaded inner shell (304) adapted to the internal thread (303), the threaded inner shell (304) is provided with a second ventilation opening (305) connected to the first ventilation opening (302), and a rotating handle (306) distributed in a ring shape is provided on one side outer wall of the threaded inner shell (304).

3. The energy-saving permanent magnet motor for an electric tugboat according to claim 1, characterized in that: The outer wall of the fixed outer ring (301) is provided with an external thread (314), the external thread of the fixed outer ring (301) is connected to a threaded clamping ring (315) adapted to the external thread (314), rotating protrusions (316) are evenly provided on the outer periphery of one side of the threaded clamping ring (315), and a dustproof filter (317) is provided on the inner wall of the other side of the threaded clamping ring (315).

4. The energy-saving permanent magnet motor for an electric tugboat according to claim 1, characterized in that: Fixed support plates (416) are symmetrically provided on both sides of the first water tank (413) and the second water tank (414); a clamping block (417) is provided on the top of the fixed support plate (416) located on one side of the second water tank (414); a clamping groove (418) adapted to the clamping block (417) is provided on the fixed support plate (416) located on one side of the first water tank (413); and communicating water pipes (419) are symmetrically provided on both sides of the first water tank (413) and the second water tank (414), wherein the two water pipes (419) are connected to each other via a connecting water pipe (420).

5. The energy-saving permanent magnet motor for an electric tugboat according to claim 1, characterized in that: A sealing cover plate (426) is provided on the top of the circulating water tank (421), a double-layer sealing gasket (427) is provided on the bottom of the sealing cover plate (426), a water filter core (428) is provided on the inner wall of one side of the circulating water tank (421), and a retention net drawer (430) is provided on the inner wall of the other side of the circulating water tank (421).

6. The energy-saving permanent magnet motor for an electric tugboat according to claim 5, characterized in that: A first handle (429) is provided on the top of the water filter core (428), a second handle (431) is provided on the top of the interception net drawer (430), a fixed bracket (432) is provided on the bottom of the circulating water tank (421), a fixed bottom plate (433) is provided on the bottom of the fixed bracket (432), and the fixed bottom plate (433) is provided on the bottom of one side of the motor bracket (2).

7. The energy-saving permanent magnet motor for an electric tugboat according to claim 2, characterized in that: The threaded inner shell (304) is provided with a mounting hole (312) adapted to the motor shaft (307), and the outer periphery of the mounting hole (312) is provided with a heat dissipation opening (313) adapted to the heat dissipation fan (311).

8. The energy-saving permanent magnet motor for an electric tugboat according to claim 1, characterized in that: The first water tank (413) and the second water tank (414) are symmetrically distributed, and the first water tank (413) and the second water tank (414) are respectively provided with connection slots (415) adapted to the heat dissipation fins (411).

9. The energy-saving permanent magnet motor for an electric tugboat according to claim 1, characterized in that: The heat dissipation fins (411) are distributed in an annular shape, and the heat dissipation through holes (412) are provided on the heat dissipation fins (411) in a linear distribution.

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