Small-size low-loss shield permanent magnet synchronous motor direct connection waterwheel type oxygenation system

Abstract

According to the small-size low-loss shielding permanent magnet synchronous motor direct connection waterwheel type oxygenation system, by additionally arranging the speed reducer, the high rotating speed and low torque of the motor can be effectively converted into the low rotating speed and high torque needed by oxygenation of the waterwheel assembly, so that the diameter of the motor can be reduced to 120 mm, and the equipment cost is effectively reduced; the stator is subjected to waterproof protection by adopting the shielding sleeve, then the water storage tank supplies water to the water storage cavity through the water passing hole, the interior of the motor is cooled, heat is taken out, and a good cooling effect is achieved; wherein the shielding cavity is filled with the high-temperature-resistant heat-conducting resin, so that heat conduction can be improved, and the heat dissipation efficiency and the heat dissipation effect are further improved; according to the technical scheme, the mode that the rotor directly makes contact with water for heat dissipation in the prior art is abandoned, kinetic energy loss caused by water to rotation of the rotor is avoided by additionally arranging the isolation hood, meanwhile, the rotor is effectively protected, the cooling flow channel on the inner side of the isolation hood can also achieve a good heat dissipation effect, the comprehensive performance of the motor is improved, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of aquaculture, and in particular to a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system. Background Art

[0002] With the continuous advancement and maturity of marine aquaculture technology, the scale of marine aquaculture is increasing, and the aquaculture area is expanding. Oxygenation technology has become particularly important. Waterwheel-type aerators are widely used in aquaculture. Their main function is to increase the oxygen content in the water to ensure that the fish in the water do not suffer from hypoxia. They also inhibit the growth of anaerobic bacteria in the water, preventing the deterioration of the pond water and threatening the aquaculture production environment. In many high-yield aquaculture areas, aerators play a significant role and contribute the most to production.

[0003] The patented technology CN202210300749.2 developed by the applicant discloses a shielded permanent magnet synchronous motor directly connected to a waterwheel-type aeration system, which achieves good heat dissipation of the aerator motor by setting a water flow structure. However, in actual application, the applicant found that the above technology is a motor direct connection structure, and the optimal speed of the waterwheel aerator is 110 revolutions per minute. If 110 revolutions per minute are to be achieved and the torque is sufficient, the motor stator can only be designed to have a larger diameter (212.4 mm) to meet the driving power. As the stator diameter increases, the cost of materials such as the casing, magnets, and copper wire will increase accordingly, resulting in excessively high cost of the entire product. At the same time, since this technology uses water directly for heat dissipation, and since the rotor is immersed in water, the water will cause kinetic energy loss to the rotation of the rotor, affecting the efficiency of the motor. At the same time, impurities in the water will also adhere to the rotor, causing corrosion and damage to the rotor, affecting its service life.

[0004] Based on this, the present application proposes a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system, which can solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system, comprising:

[0008] A pontoon assembly, placed in water to provide buoyancy;

[0009] a waterwheel assembly rotatably mounted on both sides of the pontoon assembly for oxygenating the water area by rotation;

[0010] The motor is installed in the middle of the floating boat assembly and is used to provide power for the waterwheel assembly. Its speed is 660r / min. The motor includes a casing with a diameter of 120mm. Connecting disks are installed at both ends of the casing. A stator is fixed to the inner wall of the casing. A rotor is concentrically and rotatably provided on the inner side of the stator. A rotor shaft is passed through the rotor, and both ends of the rotor shaft pass through the connecting disk. A first shaft seal is provided between the two. The waterwheel assembly is installed at both ends of the rotor shaft. A shielding sleeve is provided between the connecting disks on both sides. The shielding sleeve is connected to the side of the casing close to the axis center and forms a shielding cavity with the casing. The stator The sub is located in the shielding cavity, and the shielding cavity is filled with high-temperature resistant thermal conductive resin; an isolation cover is provided on the outside of the rotor, a water storage cavity is formed between the isolation cover and the connecting disk, one end of the isolation cover is sealed with a second shaft seal, the second shaft seal is arranged on the outside of the rotor shaft and close to the rotor, the other end of the isolation cover is sealed with the shielding sleeve, the inner wall of the isolation cover is provided with a cooling flow channel, the outer wall of the isolation cover is provided with a flow channel opening, the flow channel opening is connected with the cooling flow channel and the water storage cavity, a water storage tank is provided on the outside of the motor, a third shaft seal is provided between the water storage tank and the rotor shaft, and the water storage tank is connected with the water storage cavity through a water hole;

[0011] A reducer is connected between the waterwheel assembly and the motor, and is used to convert the high-speed, low-torque output power of the motor into the low-speed, high-torque input power of the waterwheel assembly, and its reduction ratio is 1:6.

[0012] Preferably, the pontoon assembly includes a main pontoon and an auxiliary pontoon, the auxiliary pontoons are located on both sides of the main pontoon, the motor is installed on the main pontoon, and the waterwheel assembly is rotatably provided on the auxiliary pontoon.

[0013] Preferably, the waterwheel assembly includes a flange joint, one end of the flange joint is transmission-connected to the output end of the reducer, and the other end is transmission-connected to the rotating shaft. The outer sleeve of the rotating shaft is provided with an impeller assembly and is rotatably mounted on the auxiliary floating boat through a bearing seat.

[0014] Preferably, the impeller assembly includes a sleeve, which is sleeved on the surface of the rotating shaft. The surface of the sleeve is connected to blades via a support rod, and a plurality of water leakage holes are opened on the blades.

[0015] Preferably, the blades are arranged at an inclination, and the blades close to the main pontoon are inclined toward a side close to the main pontoon, and the blades away from the main pontoon are inclined toward a side away from the auxiliary pontoon.

[0016] Preferably, a water inlet is provided at the top of the water storage tank, and a shielding frame is installed at the water inlet, and the shielding frame is formed by crossing a plurality of round rods.

[0017] Preferably, a mounting groove is provided at the water hole, and filter floss is positioned in the mounting groove by a retaining ring.

[0018] Preferably, a drainage hole is provided at the bottom of the water storage tank, and a drainage screw is screwed into the drainage hole.

[0019] Preferably, an axial baffle is sleeved on the outside of the rotor shaft, and the axial baffle is located on the side of the second shaft seal. The connecting disk extends along the rotor shaft to form an extension portion, and the extension portion abuts against the surface of the axial baffle. A graphite sleeve is provided between the extension portion and the rotor shaft, and the contact surface between the rotor shaft and the graphite sleeve is sprayed with a ceramic coating.

[0020] Preferably, it also includes:

[0021] A controller is electrically connected to the motor coil via an electric cable, and the motor coil is wound on the surface of the stator.

[0022] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0023] The present invention provides a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type aeration system. By adding a reducer, the high speed and low torque of the motor can be effectively converted into the low speed and high torque required for aeration of the waterwheel assembly, so that the diameter of the motor can be reduced to 120mm, effectively reducing the equipment cost.

[0024] The present invention provides a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygen enrichment system, which uses a shielding sleeve to provide water-proof protection for the stator, and then a water storage tank supplies water to the water storage cavity through a water hole to dissipate heat inside the motor and bring the heat out, achieving a better cooling effect; wherein, the shielding cavity is filled with high-temperature resistant thermal conductive resin to improve heat conduction, thereby further improving the heat dissipation efficiency and heat dissipation effect.

[0025] The present invention provides a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygen enrichment system, which abandons the original technology of heat dissipation by direct contact of the rotor with water. By adding an isolation cover, the kinetic energy loss of the rotor rotation caused by water is avoided, and at the same time, effective protection is formed for the rotor. The cooling flow channel inside the isolation cover can also achieve good heat dissipation effect, thereby improving the overall performance and life of the motor.

[0026] The present invention provides a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system. A water inlet is opened at the top of a water storage tank, and a shielding frame is provided at the water inlet. Through the operation of the waterwheel assembly, part of the splashed water enters the water storage tank from the water inlet, which can extend the maintenance and water adding cycle. The shielding frame can prevent impurities such as large aquatic plants brought up by the waterwheel assembly from entering. After the aquatic plants are blocked by the shielding frame, they can provide shade for the water storage tank, thereby slowing down the rise in water temperature in the water storage tank in hot seasons.

[0027] The present invention provides a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygen enrichment system. By arranging axial baffles on both sides of the rotor, the axial wear resistance of the rotor is improved, and the extension part rests on the axial baffles to achieve a stabilizing effect. At the same time, the graphite sleeve can improve the wear resistance of the rotor shaft surface; and the ceramic coating can further improve the wear resistance of the rotor shaft, prevent the rotor shaft from being damaged, and increase the service life of the rotor shaft.

[0028] The present invention provides a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system. By arranging filter floss at the water through hole, the water entering the water storage chamber can be filtered, thereby preventing impurities from entering. The retaining ring can effectively fix the filter floss. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a schematic structural diagram of a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system provided by the present invention;

[0031] Figure 2 This is a schematic diagram of the motor structure in a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system provided by the present invention. DETAILED DESCRIPTION

[0032] 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.

[0033] The purpose of the present invention is to provide a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system to solve the problems existing in the prior art.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1:

[0036] This embodiment provides a small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system. Figure 1 and Figure 2 As shown, including:

[0037] The pontoon assembly 1 is placed in water to provide buoyancy;

[0038] The waterwheel assembly 2 is rotatably mounted on both sides of the pontoon assembly 1 and is used to oxygenate the water area by rotating;

[0039] 3. The motor 3 is installed in the middle of the floating boat assembly 1 and is used to provide power for the waterwheel assembly 2. Its speed is 660r / min. The motor 3 includes a casing 301 with a diameter of 120mm. 120mm is the minimum size that the motor of this embodiment can achieve. This can significantly reduce the cost of materials such as magnetic steel and copper wire that are matched therewith, thereby effectively reducing the manufacturing cost of the entire machine. Connecting disks 302 are installed at both ends of the casing 301. A stator 303 is fixed to the inner wall of the casing 301. A rotor 304 is concentrically and rotatably provided on the inner side of the stator 303. A rotor shaft 305 is provided through the rotor 304, and both ends of the rotor shaft 305 are provided through the connecting disk 302. A first shaft seal 306 is provided between the two. So far, the basic structure of the motor is not much different from that of a conventional motor. The innovation of this embodiment is that the waterwheel assembly 2 is installed at both ends of the rotor shaft 305, and a shielding sleeve 307 is provided between the connecting disks 302 on both sides. The shielding sleeve 3 07 is connected to the side of the housing 301 close to the axis, and a shielding cavity 308 is formed between the housing 301 and the housing 301. The stator 303 is located in the shielding cavity 308, and the shielding cavity 308 is filled with high-temperature resistant heat-conductive resin; an isolation cover 311 is provided on the outside of the rotor 304, and a water storage cavity 312 is formed between the isolation cover 311 and the connecting plate 302. One end of the isolation cover 311 is sealed with a second shaft seal 313, and the second shaft seal 313 is provided on the outside of the rotor shaft 305 and close to the rotor shaft 305. The other end of the isolation cover 311 is sealed and connected to the shielding sleeve 307 near the rotor 304. The inner wall of the isolation cover 311 is provided with a cooling channel 314, and the outer wall of the isolation cover 311 is provided with a channel opening 315. The channel opening 315 is connected to the cooling channel 314 and the water storage chamber 312. A water storage tank 316 is provided on the outside of the motor. A third shaft seal 317 is provided between the water storage tank 316 and the rotor shaft 305. The water storage tank 316 is connected to the water storage chamber 312 through a water hole 318.

[0040] The reducer 4 is connected between the waterwheel assembly 2 and the motor 3 and is used to convert the high-speed and low-torque output power of the motor 3 into the low-speed and high-torque input power of the waterwheel assembly 2. The reduction ratio is 1:6.

[0041] In this embodiment, the stator 303 is water-proofed by using a shielding sleeve 307, and the rotor 304 is water-proofed by using an isolation cover 311. Then, the water storage tank 316 supplies water to the water storage chamber 312 through the water hole 318, so that water flows through the cooling channel 314, dissipates heat from the rotor 304 and the stator 303 from the inside of the motor 3, and brings out the heat to achieve a better cooling effect; wherein, the shielding chamber 308 is filled with high-temperature resistant thermal conductive resin to improve the conduction of heat, thereby further improving the heat dissipation efficiency and effect; by adding the isolation cover 311, the kinetic energy loss of the rotor 304 caused by water is avoided, and at the same time, effective protection is formed for the rotor 304, and the cooling channel 314 on the inside of the isolation cover can also achieve a good heat dissipation effect, thereby improving the comprehensive performance and life of the motor 3.

[0042] Example 2:

[0043] In this embodiment, in addition to the structural features of Example 1, the floating boat assembly 1 further includes a main floating boat 101 and an auxiliary floating boat 102, the auxiliary floating boat 102 is located on both sides of the main floating boat 101, the motor 3 is installed on the main floating boat 101, and the waterwheel assembly 2 is rotatably arranged on the auxiliary floating boat 102.

[0044] In this embodiment, by providing the main pontoon 101 and the auxiliary pontoon 102 , the waterwheel assembly 2 and the motor 3 can maintain a good balance in the water, thereby performing stable oxygenation.

[0045] Example 3:

[0046] In this embodiment, in addition to the structural features of Example 1, the waterwheel assembly 2 further includes a flange joint 201, one end of which is transmission-connected to the output end of the reducer 4, and the other end thereof is transmission-connected to the rotating shaft 202. The outer portion of the rotating shaft 202 is provided with an impeller assembly, and is rotatably mounted on the auxiliary floating vessel 102 through a bearing seat 203.

[0047] In this embodiment, the flange joint 201 facilitates the connection and disassembly of the rotor shaft reducer 4 and the rotating shaft 202, and the bearing seat 203 can improve the stability of the rotating shaft 202 and the impeller assembly on the rotating shaft 202, and reduce the friction resistance when the rotating shaft 202 rotates, thereby improving the rotation efficiency of the rotating shaft 202 and the oxygen enrichment work efficiency.

[0048] Example 4:

[0049] In this embodiment, in addition to the structural features of Example 3, the impeller assembly further includes a sleeve 204, the sleeve sleeve 204 is arranged on the surface of the rotating shaft 202, the surface of the sleeve 204 is connected to the blade 206 through the support rod 205, and a plurality of water leakage holes 207 are opened on the blade 206.

[0050] In this embodiment, the water leakage hole 207 can reduce the resistance experienced by the blade 222 , thereby alleviating the workload of the motor 3 .

[0051] Example 5:

[0052] In addition to the structural features of Example 4, the present embodiment further includes blades 206 arranged at an angle, with blades 206 close to the main pontoon 101 tilted toward the side close to the main pontoon 101 and blades 206 away from the main pontoon 101 tilted toward the side away from the auxiliary pontoon 102.

[0053] In this embodiment, the blades 206 are tilted, and the support rods 205 and the blades 206 are driven by the rotating shaft 202 to stir up water. At the same time, the blades 206 on both sides of the main pontoon 101 are tilted toward the main pontoon 101, thereby increasing the amount of water splashed toward the main pontoon 101 and the probability and amount of water splashing into the water storage tank 316, thereby extending the maintenance period of water storage in the water storage tank 316. The blades 206 away from the main pontoon 101 are tilted toward the side away from the auxiliary pontoon 102, which can reduce the amount of water splashing onto the auxiliary pontoon 102, avoid increasing the weight of the auxiliary pontoon 102, avoid causing excessive changes in the water entry depth of the blades, increase the resistance to the blades, and enable the blades to maintain high efficiency. At the same time, the stirred water splash can also have a cooling effect on the motor 4 and the surface of the water storage tank 316 in hot weather.

[0054] Example 6:

[0055] In this embodiment, in addition to the structural features of embodiment 1, a water inlet 319 is further provided on the top of the water storage tank 316, and a shielding frame 320 is installed at the water inlet 319. The shielding frame 320 is formed by crossing multiple round rods.

[0056] In this embodiment, a water inlet 319 is opened at the top of the water storage tank 316, and a shielding frame 320 is set at the water inlet 319. Through the operation of the waterwheel assembly 2, part of the splashed water enters the water storage tank 316 from the water inlet 319, which can extend the maintenance and water adding cycle. The shielding frame 320 can prevent impurities such as large aquatic plants brought up by the waterwheel assembly 2 from entering. After the aquatic plants are blocked by the shielding frame 320, they can provide shade for the water storage tank 316, thereby slowing down the rise in water temperature in the water storage tank 316 in hot seasons.

[0057] Example 7:

[0058] In this embodiment, in addition to the structural features of embodiment 1, a mounting groove 321 is further provided at the water hole 318 , and a filter floss 323 is positioned in the mounting groove 321 by a retaining ring 322 .

[0059] In this embodiment, a filter floss 323 is provided at the water hole 318 to filter the water entering the water storage chamber 312 , thereby preventing impurities from entering, and the retaining ring 322 can fix the filter floss 323 .

[0060] Example 8:

[0061] In this embodiment, in addition to the structural features of the first embodiment, a drainage hole 324 is further provided at the bottom of the water storage tank 316 , and a drainage screw 325 is screwed into the drainage hole 324 .

[0062] This embodiment provides a drainage hole 324 to facilitate the discharge of impurities in the water tank 316, preventing the impurities from accumulating for a long time and causing blockage of the water hole 318. At the same time, a drainage screw 325 is used to facilitate the opening and closing of the drainage hole 324, thereby improving the efficiency of cleaning the water tank 316.

[0063] Example 9:

[0064] In this embodiment, in addition to the structural features of Example 1, an axial baffle 309 is further provided on the outer surface of the rotor shaft 305. The axial baffle 309 is located on the side of the second shaft seal 313. The connecting plate 302 extends along the rotor shaft 305 to form an extension portion 326. The extension portion 326 abuts against the surface of the axial baffle 309. A graphite sleeve 327 is provided between the extension portion 326 and the rotor shaft 305. The contact surface between the rotor shaft 305 and the graphite sleeve 327 is sprayed with a ceramic coating.

[0065] In this embodiment, axial baffles 309 are provided on both sides of the rotor 304 to improve the wear resistance of the rotor shaft 305, and the extension portion 326 abuts against the axial baffles 309 to achieve a stabilizing effect. At the same time, the extension portion 326 can also improve the stability of the rotor shaft 305, thereby improving the stability of the rotor 304. The graphite sleeve 327 can improve the wear resistance of the surface of the rotor shaft 305, prevent the rotor shaft 305 from wear, and increase the service life of the rotor shaft 305. The ceramic coating is sprayed on the surface of the rotor shaft 305 to further improve the wear resistance of the rotor shaft 305, prevent the rotor shaft 305 from damage, and increase the service life of the rotor shaft 305.

[0066] Example 10:

[0067] In addition to the structural features of Example 1, this embodiment further includes:

[0068] Controller 5, controller 5 is electrically connected to motor coil 7 through cable 6, motor coil 7 is wound on the surface of stator 303, and cable 7 can be installed on housing 301 through terminal block, and the terminal block and cable 7 are sealed to ensure that motor 3 will not be damaged by splashes when in use. The sealing treatment here is an existing technology that can be known to technicians in this field and will not be elaborated here.

[0069] In this embodiment, the controller 5 starts and controls the operation of the motor 3; then the stator 303 of the motor 3 drives the rotor 304 to rotate, thereby rotating the rotor shaft 305 and driving the waterwheel assembly 2 to rotate, and the impeller assembly in the waterwheel assembly 2 stirs up water to perform oxygenation operations, and part of the water stirred up by the waterwheel assembly 2 enters the water storage tank 316 through the water inlet 319, and the pre-filled water in the water storage tank 316 and the stirred water enter the water storage chamber 312 through the water hole 318, thereby water-cooling the rotor 304 and the stator 303, preventing the motor 3 from overheating, avoiding damage to the motor 3 caused by hot weather, and affecting the service life of the motor 3.

[0070] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system, characterized in that: include: A pontoon assembly, the pontoon assembly is placed in water to provide buoyancy; A waterwheel assembly, the waterwheel assembly being rotatably mounted on both sides of the floating boat assembly and used for oxygenating the water area by rotation; The motor is installed in the middle of the floating boat assembly and is used to provide power for the waterwheel assembly. The speed is 660r / min. The motor includes a casing with a diameter of 120mm. Connecting disks are installed at both ends of the casing. A stator is fixed to the inner wall of the casing. A rotor is rotatably arranged concentrically on the inner side of the stator. A rotor shaft is passed through the rotor, and both ends of the rotor shaft pass through the connecting disks. A first shaft seal is arranged between the two. The waterwheel assembly is installed at both ends of the rotor shaft. A shielding sleeve is arranged between the connecting disks on both sides. The shielding sleeve is connected to the side of the casing close to the axis center and forms a shielding cavity with the casing. The shield is located in the shielding cavity, and the shielding cavity is filled with high-temperature resistant heat-conductive resin; an isolation cover is provided on the outside of the rotor, a water storage cavity is formed between the isolation cover and the connecting disk, one end of the isolation cover is sealed and connected to the second shaft seal, the second shaft seal is arranged on the outside of the rotor shaft and close to the rotor, the other end of the isolation cover is sealed and connected to the shielding sleeve, the inner wall of the isolation cover is provided with a cooling flow channel, the outer wall of the isolation cover is provided with a flow channel opening, the flow channel opening is connected with the cooling flow channel and the water storage cavity, a water storage tank is provided on the outside of the motor, a third shaft seal is provided between the water storage tank and the rotor shaft, and the water storage tank is connected with the water storage cavity through a water hole; A reducer is drivingly connected between the waterwheel assembly and the motor, and is used to convert the high-speed and low-torque output power of the motor into the low-speed and high-torque input power of the waterwheel assembly, and its reduction ratio is 1:

6.

2. According to claim 1, the small-volume, low-loss shielded permanent magnet synchronous motor directly connected to the waterwheel type oxygenation system is characterized in that: The pontoon assembly comprises a main pontoon and an auxiliary pontoon. The auxiliary pontoons are located at both sides of the main pontoon. The motor is installed on the main pontoon. The waterwheel assembly is rotatably arranged on the auxiliary pontoon.

3. The small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system according to claim 2 is characterized in that: The waterwheel assembly includes a flange joint, one end of which is transmission-connected to the output end of the reducer, and the other end of which is transmission-connected to the rotating shaft. The outer sleeve of the rotating shaft is provided with an impeller assembly, and is rotatably mounted on the auxiliary floating boat through a bearing seat.

4. The small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system according to claim 3 is characterized in that: The impeller assembly comprises a sleeve, which is sleeved on the surface of the rotating shaft. The surface of the sleeve is connected with blades via a supporting rod, and a plurality of water leakage holes are opened on the blades.

5. The small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system according to claim 4 is characterized in that: The blades are arranged at an inclination, and the blades close to the main floating ship are inclined toward a side close to the main floating ship, and the blades away from the main floating ship are inclined toward a side away from the auxiliary floating ship.

6. The small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system according to claim 1 is characterized in that: A water inlet is arranged on the top of the water storage tank, and a shielding frame is installed at the water inlet. The shielding frame is formed by crossing a plurality of round rods.

7. The small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system according to claim 1 is characterized in that: The water hole is provided with an installation groove, and filtering silk floss is limited in the installation groove by a retaining ring.

8. The small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system according to claim 1 is characterized in that: A drainage hole is arranged at the bottom of the water storage tank, and a drainage screw is screwed into the drainage hole.

9. The small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system according to claim 1, characterized in that: The outer sleeve of the rotor shaft is provided with an axial baffle, the axial baffle is located on the side of the second shaft seal, the connecting disk extends along the rotor shaft to form an extension portion, the extension portion abuts against the surface of the axial baffle, a graphite sleeve is provided between the extension portion and the rotor shaft, and a contact surface between the rotor shaft and the graphite sleeve is sprayed with a ceramic coating.

10. The small-volume, low-loss shielded permanent magnet synchronous motor directly connected to a waterwheel-type oxygenation system according to any one of claims 1 to 9, characterized in that: Also includes: A controller is electrically connected to a motor coil via an electric cable, and the motor coil is wound on a surface of the stator.

Images