Low noise motor for fuel cell drone

Abstract

The utility model discloses a low noise motor for fuel cell unmanned plane, and the utility model relates to fuel cell unmanned plane technical field, this low noise motor for fuel cell unmanned plane, including rotor subassembly, the rotor subassembly is used to produce rotating power, stator subassembly, the stator subassembly sets up in rotor subassembly outside, the stator subassembly is used to provide stable magnetic field to break through component, break through component sets up in stator subassembly top surface and is located rotor subassembly leans on the position outside upper position, break through component is used to reduce the noise of motor operation process generation, the rotor subassembly includes base, the base top surface central position is equipped with first stair hole, the utility model can be used for fuel cell unmanned plane, can reduce noise to reduce the additional energy loss of the noise generation, and further can more efficiently operate to improve the overall performance and service life of unmanned plane.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell drone technology, specifically a low-noise motor for fuel cell drones. Background Technology

[0002] The application fields of drones are becoming increasingly widespread, with drones appearing in fields such as photography, reconnaissance, and logistics. With the advent of the big data era, drones are also being incorporated into the operations of more and more organizations. The low energy density and short flight life of traditional lithium batteries have always constrained the development of the electric low-altitude drone industry. Fuel cell drones are new energy drones powered by fuel cells. Compared with lithium batteries, fuel cells have higher energy density, and under the same flight conditions, the flight time of fuel cell drones can reach 4-5 times that of lithium battery drones.

[0003] Regarding the aforementioned technologies, the inventors believe that the following defects exist: Although existing fuel cell drone motors reduce noise, their electromagnetic noise suppression is insufficient, thus completely negating the advantages of fuel cells in terms of quietness and compromising the quietness. Therefore, we propose a low-noise motor for fuel cell drones to solve the above-mentioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a low-noise motor for fuel cell drones, solving the problem of insufficient electromagnetic noise suppression.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a low-noise motor for a fuel cell drone, comprising a rotor assembly, wherein the rotor assembly is used to generate rotational power;

[0006] A stator assembly, disposed outside the rotor assembly, is used to provide a stable magnetic field; and

[0007] A noise reduction component is disposed on the top surface of the stator assembly and located on the upper outer side of the rotor assembly. The noise reduction component is used to reduce the noise generated during motor operation.

[0008] Preferably, the rotor assembly includes a base, a first stepped hole is provided at the center of the top surface of the base, a first bearing is provided in the inner cavity of the first stepped hole, a rotating shaft is provided in the inner cavity of the first bearing, a limit frame is provided on the outer side of the rotating shaft and located on the top surface of the base, a second stepped hole is provided at the center of the top surface of the limit frame, a second bearing is provided in the inner cavity of the second stepped hole, and a rotor core is provided on the outer side of the limit frame.

[0009] Preferably, a high-damping elastic bushing is provided on the outer side of the top surface of the base, and the high-damping elastic bushing is in contact with the stator assembly.

[0010] Preferably, the top-view outer diameter of the limiting frame is the same as the top-view inner diameter of the rotor core, and the two are compatible.

[0011] Preferably, the stator assembly includes a housing disposed on the top surface of the base, a plurality of magnets disposed on the inner cavity sidewall of the housing, the plurality of magnets being arranged in a circumferential array, and a plurality of heat dissipation fins disposed on the outer side of the housing, the plurality of heat dissipation fins being arranged in a circumferential array.

[0012] Preferably, the magnet is fan-shaped to optimize the sinusoidal waveform of the air gap magnetic field and reduce harmonics.

[0013] Preferably, the breaking component includes an upper shell, which is disposed on the top surface of the outer shell. A limiting groove is formed on the top surface of the upper shell, and an engaging groove is formed at the center of the bottom surface of the upper shell. An arc-shaped plate is provided on the bottom surface of the upper shell, and multiple arc-shaped plates are provided in a circular array. A noise reduction pit is provided on the top surface of the upper shell, and multiple noise reduction pits are provided in a circular array.

[0014] Beneficial effects

[0015] This invention provides a low-noise motor for fuel cell drones. Compared with the prior art, it has the following advantages:

[0016] This fuel cell drone uses a low-noise motor. When a low-noise motor is needed for a fuel cell drone, the rotor assembly is first placed in a rainy location, and then the stator assembly is fixedly connected to the outside of the rotor assembly. Since a breaking component is fixedly connected to the top surface of the rotor assembly and to the outside of the upper part of the rotor assembly, the rotor assembly and the stator assembly can work together to achieve efficient energy conversion. This allows the rotor assembly to rotate in the stable magnetic field generated by the stator assembly, so as to convert electrical energy into mechanical energy. Then, by breaking the component, the air boundary layer formed on the surface during rotation can be broken, thereby destroying the periodic eddy shedding, so as to significantly reduce wind noise. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the rotor assembly structure of this utility model;

[0019] Figure 3This is a schematic diagram of the stator assembly structure of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the breaking component of this utility model.

[0021] In the diagram: 1. Rotor assembly; 11. Base; 12. First stepped hole; 13. First bearing; 14. Rotating shaft; 15. Limiting bracket; 16. Second stepped hole; 17. Second bearing; 18. Rotor core; 19. High-damping elastic bushing; 2. Stator assembly; 21. Housing; 22. Magnet; 23. Heat sink fins; 3. Demolition assembly; 31. Upper shell; 32. Limiting groove; 33. Engaging groove; 34. Arc plate; 35. Noise reduction pit. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a low-noise motor for fuel cell drones, including a rotor assembly 1 for generating rotational power; a stator assembly 2 disposed outside the rotor assembly 1 for providing a stable magnetic field; and a noise reduction component 3 disposed on the top surface of the stator assembly 2 and located on the upper outer side of the rotor assembly 1 for reducing the noise generated during motor operation.

[0024] When a low-noise motor is needed for a fuel cell drone, the rotor assembly 1 is first placed in a rainy location, and then the stator assembly 2 is fixedly connected to the outside of the rotor assembly 1. Since the breaking component 3 is fixedly connected to the top surface of the rotor assembly 1 and located on the upper outer side of the rotor assembly 1, the rotor assembly 1 and the stator assembly 2 can work together to achieve efficient energy conversion. This allows the rotor assembly 1 to rotate in the stable magnetic field generated by the stator assembly 2, so as to convert electrical energy into mechanical energy. Then, by breaking the component 3, the air boundary layer formed on the surface during rotation can be broken, thereby destroying the periodic eddy shedding, so as to significantly reduce wind noise.

[0025] See Figure 1 , Figure 2The rotor assembly 1 includes a base 11. A first stepped hole 12 is provided at the center of the top surface of the base 11. A first bearing 13 is provided inside the first stepped hole 12. A rotating shaft 14 is provided inside the first bearing 13. A limit frame 15 is provided outside the rotating shaft 14 and on the top surface of the base 11. A second stepped hole 16 is provided at the center of the top surface of the limit frame 15. A second bearing 17 is provided inside the second stepped hole 16. A rotor core 18 is provided outside the limit frame 15. A high-damping elastic bushing 19 is provided outside the top surface of the base 11. The high-damping elastic bushing 19 is in contact with the stator assembly 2. The outer diameter of the limit frame 15 in plan view is the same as the inner diameter of the rotor core 18 in plan view, and the two are compatible.

[0026] The base 11 in the rotor assembly 1 can be fixedly connected to a preset position and provide an installation foundation for the first stepped hole 12. Since the inner cavity of the first bearing 13 is connected to the rotating shaft 14, and the outer side of the rotating shaft 14 is connected to a limit frame 15, and a second stepped hole 16 is centrally located on the top surface of the limit frame 15, with a second bearing 17 installed inside the second stepped hole 16, the rotating shaft 14 can rotate stably under the combined support of the first bearing 13 and the second bearing 17. This allows the limit frame 15 to limit and stabilize the rotation of the rotating shaft 14, preventing deviation during rotation. Since the outer side of the limit frame 15 is connected to the rotor core 18, and the rotor core 18 is divided into two sections along the axial direction with a staggered tooth pitch, torque pulsation can be greatly smoothed, reducing electromagnetic noise and improving the quietness of the drone during flight. This contributes to the low-noise performance of the fuel cell drone. The system provides strong protection for quiet operation. The two rotor cores 18 are fixed by a plastic frame, firmly combining them into a rigid whole. This provides strong axial clamping force and circumferential torque transmission capability. The plastic layer absorbs and dampens high-frequency electromagnetic vibrations and noise, resulting in quieter motor operation. A high-damping elastic bushing 19 is connected to the outer surface of the top surface of the base 11 and fits snugly against the stator assembly 2. Made of high-damping silicone, the high-damping elastic bushing 19 effectively isolates the electromagnetic vibrations of the rotor core 18 from being transmitted to the stator assembly 2, reducing vibration and noise during motor operation and improving overall motor quietness. Furthermore, the high-damping silicone material has good elasticity and durability, preventing aging and deformation during long-term use, thus ensuring its continuous and stable vibration and noise reduction function.

[0027] See Figure 1 , Figure 3The stator assembly 2 includes a housing 21, which is disposed on the top surface of the base 11. Magnets 22 are disposed on the inner sidewall of the housing 21. Multiple magnets 22 are disposed in a circular array. Heat dissipation fins 23 are disposed on the outer side of the housing 21. Multiple heat dissipation fins 23 are disposed in a circular array. The magnets 22 are fan-shaped to optimize the sinusoidal waveform of the air gap magnetic field and reduce harmonics.

[0028] The outer casing 21 in the stator assembly 2 can be connected to the top surface of the base 11 and also provide a mounting base for the magnets 22. Since multiple magnets 22 are fixedly connected and distributed in a circumferential array, and the magnets 22 are fan-shaped, the outer casing 21 can provide support for the magnets 22, thereby optimizing the sinusoidal waveform of the air gap magnetic field and reducing harmonics. This improves the operating efficiency and stability of the motor and reduces the electromagnetic noise during motor operation. Since multiple heat dissipation fins 23 are fixedly connected to the outside of the outer casing 21 and distributed in a circumferential array, the outer casing 21 can provide support for the multiple heat dissipation fins 23. This increases the heat dissipation area of ​​the multiple heat dissipation fins 23 and accelerates the heat dissipation speed, so as to effectively reduce the heat generated during motor operation and prevent the motor from being affected by excessive temperature, thus reducing its performance and service life.

[0029] See Figure 1 , Figure 4 The breaking component 3 includes an upper shell 31, which is disposed on the top surface of the outer shell 21. A limiting groove 32 is formed on the top surface of the upper shell 31. A locking groove 33 is formed at the center of the bottom surface of the upper shell 31. An arc-shaped plate 34 is provided on the bottom surface of the upper shell 31. Multiple arc-shaped plates 34 are provided and are distributed in a circumferential array. A noise reduction pit 35 is formed on the top surface of the upper shell 31. Multiple noise reduction pits 35 are provided and are distributed in a circumferential array.

[0030] By removing the upper shell 31 in component 3, it can be fixedly connected to the top surface of the outer shell 21, and a foundation can be provided for opening the limiting groove 32. Since the bottom surface of the upper shell 31 has a locking groove 33 in the center, the limiting groove 32 can be locked onto the outside of the rotating shaft 14, thereby limiting the second bearing 17. This ensures that the second bearing 17 remains stable during motor operation, reducing shaking and friction, and thus reducing additional noise caused by bearing shaking. Since the bottom surface of the upper shell 31 is fixedly connected to an arc plate 34, and multiple arc plates 34 are fixedly connected, and the top surface of the upper shell 31 has a noise reduction pit 35, the noise reduction pit 35... The 5-section has multiple openings, allowing the arc plate 34 to be inserted between two magnets 22, thereby separating the magnets 22 to prevent displacement and collision during motor operation. This reduces noise caused by magnet 22 shaking. The arc plate has an inclination angle of 15-20°, enabling more efficient and thorough eddy current breaking with lower energy consumption, thus significantly reducing aerodynamic noise. Simultaneously, the noise reduction pits 35, with a depth of 3-5mm and a diameter of 8-10mm, can break up the air boundary layer formed on the surface during rotation, thereby disrupting periodic eddy current shedding and significantly reducing wind noise.

[0031] When a low-noise motor is needed for a fuel cell drone, the rotor assembly 1 is first placed in a rainy location, and then the stator assembly 2 is fixedly connected to the outside of the rotor assembly 1. Since the breaking component 3 is fixedly connected to the top surface of the rotor assembly 1 and located on the upper outer side of the rotor assembly 1, the rotor assembly 1 and the stator assembly 2 can work together to achieve efficient energy conversion. This allows the rotor assembly 1 to rotate in the stable magnetic field generated by the stator assembly 2, so as to convert electrical energy into mechanical energy. Then, by breaking the component 3, the air boundary layer formed on the surface during rotation can be broken, thereby destroying the periodic eddy shedding and significantly reducing wind noise.

[0032] The base 11 in the rotor assembly 1 can be fixedly connected to a preset position and provide an installation foundation for the first stepped hole 12. Since the inner cavity of the first bearing 13 is connected to the rotating shaft 14, and the outer side of the rotating shaft 14 is connected to a limit frame 15, and a second stepped hole 16 is centrally located on the top surface of the limit frame 15, with a second bearing 17 installed inside the second stepped hole 16, the rotating shaft 14 can rotate stably under the combined support of the first bearing 13 and the second bearing 17. This allows the limit frame 15 to limit and stabilize the rotation of the rotating shaft 14, preventing deviation during rotation. Since the outer side of the limit frame 15 is connected to the rotor core 18, and the rotor core 18 is divided into two sections along the axial direction with a staggered tooth pitch, torque pulsation can be greatly smoothed, reducing electromagnetic noise and improving the quietness of the drone during flight. This contributes to the low-noise performance of the fuel cell drone. The system provides strong protection for quiet operation. The two rotor cores 18 are fixed by a plastic frame, firmly combining them into a rigid whole. This provides strong axial clamping force and circumferential torque transmission capability. The plastic layer absorbs and dampens high-frequency electromagnetic vibrations and noise, resulting in quieter motor operation. A high-damping elastic bushing 19 is connected to the outer surface of the top surface of the base 11 and fits snugly against the stator assembly 2. Made of high-damping silicone, the high-damping elastic bushing 19 effectively isolates the electromagnetic vibrations of the rotor core 18 from being transmitted to the stator assembly 2, reducing vibration and noise during motor operation and improving overall motor quietness. Furthermore, the high-damping silicone material has good elasticity and durability, preventing aging and deformation during long-term use, thus ensuring its continuous and stable vibration and noise reduction function.

[0033] The outer casing 21 in the stator assembly 2 can be connected to the top surface of the base 11 and also provide a mounting base for the magnets 22. Since multiple magnets 22 are fixedly connected and distributed in a circumferential array, and the magnets 22 are fan-shaped, the outer casing 21 can provide support for the magnets 22, thereby optimizing the sinusoidal waveform of the air gap magnetic field and reducing harmonics. This improves the operating efficiency and stability of the motor and reduces the electromagnetic noise during motor operation. Since multiple heat dissipation fins 23 are fixedly connected to the outside of the outer casing 21 and distributed in a circumferential array, the outer casing 21 can provide support for the multiple heat dissipation fins 23. This increases the heat dissipation area of ​​the multiple heat dissipation fins 23 and accelerates the heat dissipation speed, so as to effectively reduce the heat generated during motor operation and prevent the motor from being affected by excessive temperature, thus reducing its performance and service life.

[0034] By removing the upper shell 31 in component 3, it can be fixedly connected to the top surface of the outer shell 21, and a foundation can be provided for opening the limiting groove 32. Since the bottom surface of the upper shell 31 has a locking groove 33 in the center, the limiting groove 32 can be locked onto the outside of the rotating shaft 14, thereby limiting the second bearing 17. This ensures that the second bearing 17 remains stable during motor operation, reducing shaking and friction, and thus reducing additional noise caused by bearing shaking. Since the bottom surface of the upper shell 31 is fixedly connected to an arc plate 34, and multiple arc plates 34 are fixedly connected, and the top surface of the upper shell 31 has a noise reduction pit 35, the noise reduction pit 35... The 5-section has multiple openings, allowing the arc plate 34 to be inserted between two magnets 22, thereby separating the magnets 22 to prevent displacement and collision during motor operation. This reduces noise caused by magnet 22 shaking. The arc plate has an inclination angle of 15-20°, enabling more efficient and thorough eddy current breaking with lower energy consumption, thus significantly reducing aerodynamic noise. Simultaneously, the noise reduction pits 35, with a depth of 3-5mm and a diameter of 8-10mm, can break up the air boundary layer formed on the surface during rotation, thereby disrupting periodic eddy current shedding and significantly reducing wind noise.

[0035] In summary, this device can be used in fuel cell drones and can reduce noise, thereby reducing additional energy loss caused by noise and enabling more efficient operation, which in turn improves the overall performance and lifespan of the drone.

[0036] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A low-noise motor for a fuel cell drone, characterized in that: include: Rotor assembly (1), said rotor assembly (1) is used to generate rotational power; Stator assembly (2), which is disposed outside the rotor assembly (1), is used to provide a stable magnetic field; as well as The noise reduction component (3) is disposed on the top surface of the stator assembly (2) and located on the upper outer side of the rotor assembly (1). The noise reduction component (3) is used to reduce the noise generated during motor operation.

2. The low-noise motor for a fuel cell drone according to claim 1, characterized in that: The rotor assembly (1) includes a base (11), and a first stepped hole (12) is provided at the center of the top surface of the base (11). A first bearing (13) is provided in the inner cavity of the first stepped hole (12), and a rotating shaft (14) is provided in the inner cavity of the first bearing (13). A limit frame (15) is provided on the outer side of the rotating shaft (14) and on the top surface of the base (11). A second stepped hole (16) is provided in the center of the top surface of the limit frame (15). A second bearing (17) is provided in the inner cavity of the second stepped hole (16). A rotor core (18) is provided on the outer side of the limit frame (15).

3. A low-noise motor for a fuel cell drone according to claim 2, characterized in that: A high-damping elastic bushing (19) is provided on the outer side of the top surface of the base (11), and the high-damping elastic bushing (19) is in contact with the stator assembly (2).

4. A low-noise motor for a fuel cell drone according to claim 2, characterized in that: The outer diameter of the limiting frame (15) when viewed from above is the same as the inner diameter of the rotor core (18) when viewed from above, and the two are compatible.

5. A low-noise motor for a fuel cell drone according to claim 3, characterized in that: The stator assembly (2) includes a housing (21), which is disposed on the top surface of the base (11). The inner cavity sidewall of the housing (21) is provided with magnets (22), and multiple magnets (22) are provided, which are distributed in a circumferential array. The outer side of the outer shell (21) is provided with heat dissipation fins (23), and there are multiple heat dissipation fins (23) arranged in a circular array.

6. A low-noise motor for a fuel cell drone according to claim 5, characterized in that: The magnet (22) is fan-shaped and is used to optimize the sinusoidal waveform of the air gap magnetic field and reduce harmonics.

7. A low-noise motor for a fuel cell drone according to claim 5, characterized in that: The breaking component (3) includes an upper shell (31), which is disposed on the top surface of the outer shell (21). A limiting groove (32) is provided on the top surface of the upper shell (31), and a locking groove (33) is provided at the center of the bottom surface of the upper shell (31). The bottom surface of the upper shell (31) is provided with an arc-shaped plate (34), and multiple arc-shaped plates (34) are provided. The multiple arc-shaped plates (34) are distributed in a circular array. The top surface of the upper shell (31) is provided with noise reduction pits (35), and multiple noise reduction pits (35) are provided. The multiple noise reduction pits (35) are distributed in a circular array.

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