A noise-reducing energy-saving single-phase alternating current motor

Abstract

The application relates to a noise-reducing energy-saving single-phase alternating-current motor, and relates to the technical field of motors. The motor comprises a shell, a stator, a rotor and a rotating shaft. The rotor is coaxially sleeved on the rotating shaft, and the rotor is fixedly connected with the rotating shaft. The stator is coaxially sleeved outside the rotor, and the stator is arranged in a spaced mode with the rotor. The stator, the rotor and the rotating shaft are all located in the shell, and the two ends of the rotating shaft both extend out of the shell. The stator, the rotor and the rotating shaft are all movably connected with the shell. A centering mechanism is arranged on the shell. The centering mechanism comprises a first fine adjustment assembly and a second fine adjustment assembly. The first fine adjustment assembly is rotationally connected with the rotating shaft, and the second fine adjustment assembly is connected with the stator. The driving directions of the first fine adjustment assembly and the second fine adjustment assembly are arranged in a perpendicular mode, and the driving directions of the first fine adjustment assembly and the second fine adjustment assembly are both perpendicular to the axial direction of the rotating shaft. Through the arrangement of the centering mechanism, the generation of electromagnetic noise and mechanical noise can be inhibited, and the energy-saving effect is also achieved.

Description

Technical Field

[0001] This application relates to the technical field of electric motors, and in particular to a noise-reducing and energy-saving single-phase AC motor. Background Technology

[0002] Single-phase AC motors are widely used in household appliances, power tools, small industrial and commercial equipment, agricultural and horticultural equipment, and medical devices due to their significant advantages of simple structure, economical cost, and direct connection to ordinary mains power.

[0003] Currently, the noise generated during the operation of ordinary motors mainly comes from three aspects: electromagnetic noise, mechanical noise, and ventilation noise. Electromagnetic noise is mainly caused by the harmonic magnetic field in the air gap. The radial alternating magnetic pull generated by the interaction of the harmonic magnetic fields of the stator and rotor teeth causes periodic dynamic radial deformation of the stator core yoke, which excites the stator to generate electromagnetic noise. Mechanical noise is mainly bearing noise and structural component resonance noise, followed by rotational vibration noise. Ventilation noise is mainly the noise generated by the periodic impact of protruding parts such as fan blades and rotor blades on the air when the motor rotates.

[0004] Currently, the main technical solution to reduce the noise generated by motors during operation is to install elastic damping elements such as springs inside the motor. These elastic damping elements are mainly installed at locations such as bearing housings, end cover connections, and motor mounting points. Through these elastic damping elements, the mechanical vibration transmission path can be effectively buffered and isolated, thereby significantly attenuating vibration energy and ultimately reducing the resulting structural noise radiation.

[0005] Regarding the aforementioned technologies, the use of elastic vibration damping elements only attenuates vibration energy during its transmission; it does not suppress its generation. Therefore, when these elements are used for extended periods or when the environment significantly impacts their lifespan, they gradually fail, leading to reduced damping effectiveness and increased motor noise. Consequently, the use of elastic vibration damping elements cannot fundamentally suppress motor vibration, resulting in their failure after prolonged operation and increased motor noise. Summary of the Invention

[0006] This application provides a noise-reducing and energy-saving single-phase AC motor, the purpose of which is to suppress the generation of motor vibration, thereby suppressing the generation of noise.

[0007] The noise-reducing and energy-saving single-phase AC motor provided in this application adopts the following technical solution: A noise-reducing and energy-saving single-phase AC motor includes a housing, a stator, a rotor, and a shaft. The rotor is coaxially sleeved on the shaft and fixedly connected to it. The stator is coaxially sleeved on the outside of the rotor and spaced apart from it. The stator, rotor, and shaft are all located within the housing, and both ends of the shaft extend out of the housing. The stator, rotor, and shaft are all movably connected to the housing. A self-aligning mechanism is provided on the housing, comprising a first fine-tuning component and a second fine-tuning component. The first fine-tuning component is rotatably connected to the shaft, and the second fine-tuning component is connected to the stator. The driving directions of the first and second fine-tuning components are perpendicular to each other, and both driving directions are perpendicular to the axial direction of the shaft.

[0008] By adopting the above technical solution, the combination of the housing, stator, rotor and shaft can realize the basic functions of the motor.

[0009] Based on this, the self-aligning mechanism inside the housing, through the cooperation of the first fine-tuning component and the second fine-tuning component, can adjust the relative position of the stator and the rotor, thereby adjusting the coaxiality of the stator and the rotor, since the fine-tuning direction of the first fine-tuning component driving the rotor, the fine-tuning direction of the second fine-tuning component driving the stator, and the axial direction of the rotating shaft are all perpendicular to each other.

[0010] Due to the existence of component processing errors, assembly errors, and wear problems caused by long-term operation in existing motors, eccentricity is prone to occur between the rotor and stator inside the motor, resulting in uneven air gap between the rotor and stator, which in turn generates electromagnetic noise and mechanical noise.

[0011] Based on the existence of this problem, this application uses a self-aligning mechanism to adjust the coaxiality of the rotor and stator, so that the air gap between the rotor and stator is redistributed evenly, thereby effectively suppressing the generation of electromagnetic noise and mechanical noise, reducing motor vibration and noise at the source, improving the smoothness of motor operation, extending the service life of motor, and also helping to improve motor energy efficiency and achieve energy saving.

[0012] Optionally, a first mounting assembly is provided inside the housing. The first mounting assembly includes two bearing seats, which are spaced apart along the axial direction of the rotating shaft. The rotating shaft is inserted into and rotatably connected to the bearing seats. The rotor and the stator are both located between the two bearing seats, and the bearing seats are slidably connected to the inner wall of the housing. A connecting plate is provided between the two bearing seats, and both bearing seats are connected to the connecting plate. The connecting plate is spaced apart on the outer side of the stator. A first fine-tuning assembly is provided on the housing, and the connecting plate is connected to the first fine-tuning assembly.

[0013] By adopting the above technical solution, the first mounting assembly, through the cooperative design of the connecting plate and two bearing seats, mounts the rotating shaft, and the rotating shaft is rotatably connected to the bearing seats. This ensures stable rotation of the rotating shaft. Therefore, the cooperative design of the two bearing seats not only ensures stable rotation of the rotating shaft but also provides good support and positioning for the rotor and stator, making the motor run more smoothly. Furthermore, due to the sliding connection between the bearing seats and the inner wall of the housing, the rotating shaft can be finely adjusted under the action of the self-aligning mechanism, ensuring normal fine-tuning of the rotating shaft and rotor. The connecting plate, by connecting the two bearing seats, further improves the stability of the first mounting assembly mechanism. Moreover, since the connecting plate is connected to the first fine-tuning component, it ensures that the first fine-tuning component can drive the first mounting assembly to move, thereby driving the rotating shaft and rotor to move synchronously. This ensures that the rotating shaft and rotor can be finely adjusted under normal operating conditions.

[0014] Optionally, the first fine-tuning component includes a power source, a fine-tuning screw, and a fine-tuning slide. The fine-tuning slide is connected to the connecting plate, the fine-tuning screw is screwed to the fine-tuning slide, and both ends of the fine-tuning screw are rotatably connected to the housing in the length direction. The power source is located on the outside of the housing, and one end of the fine-tuning screw is coaxially connected to the power source.

[0015] By adopting the above technical solution, the second fine-tuning component, through the coordinated design of a power source, a fine-tuning screw, and a fine-tuning slide, provides power to drive the fine-tuning screw to rotate. The fine-tuning screw is screwed to the fine-tuning slide, thereby causing the fine-tuning screw to move, thus realizing the fine-tuning function of the rotor and shaft. This precise fine-tuning mechanism allows for better adjustment of the coaxiality between the stator and rotor, further optimizing the motor's operating state and reducing noise and vibration. Furthermore, this structure offers high adjustment accuracy and flexibility, enabling fine-tuning according to actual needs, improving the motor's adaptability and reliability, and also contributing to increased energy efficiency and service life.

[0016] Optionally, the housing is further provided with a brake assembly, which is connected to the side wall of the housing. The end of the fine-tuning screw that is away from the power source along its own axis is coaxially connected to the brake assembly, and the brake assembly is used to lock the fine-tuning screw.

[0017] By adopting the above technical solution, based on the setting of the brake assembly, when fine-tuning of the stator and / or rotor is required, the brake assembly releases the lock on the fine-tuning screw. Driven by the power source, the fine-tuning screw rotates, thereby achieving precise adjustment of the stator or rotor. After adjustment, the brake assembly relocks the fine-tuning screw. At this time, the brake assembly can prevent the fine-tuning screw from rotating slightly due to vibration or other external forces during motor operation. Therefore, the brake assembly can ensure that the position of the stator and rotor remains stable, avoiding increased noise and vibration caused by positional deviation. The locking mechanism of the brake assembly effectively improves the stability and reliability of motor operation, extends the service life of the motor, and also ensures that the motor maintains good noise reduction performance even after long-term operation, further optimizing the overall performance of the motor.

[0018] Optionally, it may also include an active cooling mechanism, which includes a cooling fan located on the outside of the housing and detachably connected to the rotating shaft.

[0019] By adopting the above technical solution, based on the setting of the cooling fan, since the cooling fan is coaxially connected to the shaft, the cooling fan can rotate synchronously with the rotation of the shaft during the operation of the motor, thereby actively cooling the motor and keeping the motor operating within the normal temperature range, thereby improving the operating efficiency and reliability of the motor, while also helping to reduce the energy consumption of the motor and further achieving the effect of energy saving.

[0020] Based on this, the coaxial and detachable connection design between the cooling fan and the shaft facilitates the installation and removal of the cooling fan. When cooling is needed, the cooling fan can be installed to ensure the normal operation of the motor; when cooling is not needed, the cooling fan can be removed to eliminate ventilation noise.

[0021] Optionally, the active cooling mechanism further includes a fan bracket, with the cooling fan coaxially mounted inside the fan bracket and rotatably connected to the fan bracket; a telescopic sleeve is provided between the fan bracket and the outer casing, one end of the telescopic sleeve being coaxially connected to the fan bracket and the other end being connected to the outer casing, and the telescopic sleeve being coaxially sleeved on the outside of the rotating shaft, with the telescopic sleeve spaced apart from the rotating shaft; a magnetic coupler is provided between the rotating shaft and the cooling fan, the magnetic coupler including a conductor disk and a permanent magnet disk, the conductor disk and the permanent magnet disk being coaxially mounted inside the fan bracket, and both the conductor disk and the permanent magnet disk being rotatably connected to the fan bracket, the permanent magnet disk being coaxially connected to the rotating shaft, the conductor disk being coaxially connected to the cooling fan, and the permanent magnet disk and the conductor disk being coaxially opposite each other.

[0022] By adopting the above technical solution, the active cooling mechanism, through the setting of the fan bracket, which encloses the cooling fan, thus protecting the cooling fan. The fan bracket not only provides mechanical support for the cooling fan but also prevents direct impact and damage from the external environment, extending the service life of the cooling fan.

[0023] The active cooling mechanism utilizes a telescopic sleeve, which extends and retracts along its own axis, causing the fan bracket to move synchronously along the shaft's axis. This design allows the cooling fan to adjust its position according to the motor's internal heat load requirements and operating conditions, thereby dynamically changing the distance between the cooling fan and the motor housing and optimizing heat dissipation.

[0024] The active cooling mechanism uses a magnetic coupler to transmit torque through the magnetic field interaction between the conductor disk and the permanent magnet disk, thus achieving a detachable connection between the shaft and the cooling fan and ensuring that the shaft can drive the cooling fan to rotate synchronously.

[0025] Building upon this foundation, the design incorporates a fan bracket, telescopic sleeve, and magnetic coupler. As the telescopic sleeve extends or retracts, the position of the cooling fan changes. The magnetic coupler then adjusts the torque transmission efficiency based on the relative positions of the cooling fan and the shaft, thereby optimizing the overall performance of the cooling system while maintaining the stability of the connection between the cooling fan and the shaft. This design not only enhances the dynamic adjustment capability of the cooling effect but also enables the motor to automatically adapt to cooling requirements under different operating conditions, reducing energy consumption and noise, and significantly improving the motor's operating efficiency and reliability under complex conditions.

[0026] Optionally, the conductor turntable is slidably connected to the fan frame along its own axial direction, and one end of the telescopic sleeve is slidably connected to the outer casing.

[0027] By adopting the above technical solution, since the telescopic sleeve is slidably connected to the outer shell, when the first fine-tuning component makes a fine adjustment to the shaft, the conductor turntable pushes the fan bracket, thereby enabling the shaft to drive the cooling fan, the fan bracket and the telescopic sleeve to move synchronously. This can ensure the coaxiality of the shaft and the cooling fan and prevent the cooling fan from generating a lot of noise when it rotates due to the eccentricity between the shaft and the cooling fan.

[0028] Optionally, a switching drive is provided between the fan frame and the housing, the switching drive being used to drive the fan frame to move axially along the rotating shaft.

[0029] By adopting the above technical solution, the fan bracket can be driven to move along the axial direction of the rotating shaft by switching the driving components. This can adjust the distance between the cooling fan and the outer casing, thereby achieving dynamic adjustment of the cooling effect.

[0030] When the ambient temperature is low or the motor load is low, the cooling fan is moved away from the casing by switching the drive components, so that the cooling fan stops or slows down, thereby stopping or reducing heat dissipation and reducing energy consumption. At this time, the motor is in an energy-saving and noise-reducing state.

[0031] When the ambient temperature is high or the motor load is heavy, the cooling fan is brought closer to the housing by switching the drive components, so that the cooling fan starts to rotate or accelerates, thereby opening or increasing the cooling airflow and improving the cooling effect. At this time, the motor is in a state of cooling down.

[0032] Therefore, the switching of drive components enables the motor to switch between a noise reduction and energy saving state and a heat dissipation and cooling state.

[0033] Optionally, the active heat dissipation mechanism further includes a ventilation shroud, which is connected to the outer shell and has several ventilation micro-holes; the cooling fan, fan bracket, telescopic sleeve and magnetic coupler are all located inside the ventilation shroud.

[0034] By adopting the above technical solution, the active cooling mechanism incorporates a ventilation shroud, housing the cooling fan, fan bracket, telescopic sleeve, and magnetic coupler. This allows the ventilation shroud to filter the air entering the motor, preventing dust and impurities from entering and reducing heat dissipation problems and motor malfunctions caused by impurity accumulation, thereby improving the motor's operational reliability and service life. Furthermore, the ventilation shroud guides airflow, distributing the airflow generated by the cooling fan more evenly throughout the motor, improving cooling efficiency. In addition, the ventilation shroud also provides some sound insulation, reducing the transmission of noise generated by the cooling fan to the outside, thus lowering the overall noise level of the motor and improving its quietness.

[0035] Optionally, the outer casing includes a square tube shell, with both the stator and the rotor located inside the square tube shell. The first fine-tuning component and the second fine-tuning component are both disposed on the square tube shell. One end of the square tube shell has a front end cover, and the other end has a rear end cover. Both the front end cover and the rear end cover are detachably connected to the square tube shell, and both close the square tube shell. The front end cover has a first long sliding hole, and the rear end cover has a second long sliding hole. The length direction of the first long sliding hole is aligned with the length direction of the second long sliding hole. One end of the rotating shaft is inserted into the first long sliding hole, and the other end is inserted into the second long sliding hole. The inner walls of both the first and second long sliding holes are spaced apart from the rotating shaft. The first fine-tuning component is used to drive the rotor to move along the length direction of the first long sliding hole.

[0036] By adopting the above technical solution, the outer casing is composed of a square tube shell, a front cover, and a rear cover. Both the front cover and the rear cover are detachably connected to the square tube shell. This design facilitates the easy assembly and disassembly of the outer casing, enabling rapid assembly during production and efficient disassembly during maintenance, thereby improving the maintenance efficiency of the motor and the flexibility of production.

[0037] Meanwhile, the square tube shell provides a stable installation space for the stator, rotor, and self-aligning mechanism, ensuring the precise installation and operational stability of various internal components of the motor, and providing a fundamental guarantee for the efficient operation of the motor.

[0038] Based on this, a first long sliding hole and a second long sliding hole are respectively opened on the front and rear covers, and the length directions of these two long sliding holes are consistent. The two ends of the rotating shaft are respectively inserted into these two long sliding holes. This design not only provides stable mounting support for the rotating shaft, but also allows the rotating shaft to be finely adjusted along the length directions of the first and second long sliding holes. Therefore, this structure, in conjunction with the self-aligning mechanism, can realize the coaxiality adjustment of the rotor and stator, thereby optimizing the operating state of the motor.

[0039] In summary, this application includes at least one of the following beneficial technical effects: 1. This application, through the setting of the self-aligning mechanism, can adjust the coaxiality of the rotor and stator inside the motor, so that the air gap between the rotor and stator is redistributed evenly, thereby effectively suppressing the generation of electromagnetic noise and mechanical noise, and also helping to improve the energy efficiency of the motor and achieve energy saving.

[0040] 2. By setting up the brake assembly, this application can lock the fine adjustment screw and prevent the fine adjustment screw from rotating slightly due to vibration or other external forces during motor operation. Therefore, the brake assembly can ensure that the stator and rotor remain in stable position and avoid increased noise and vibration caused by position deviation.

[0041] 3. The active heat dissipation mechanism of this application is designed so that the motor can switch between a noise reduction and energy saving state and a heat dissipation and cooling state. In an environment where heat dissipation is not required, the motor can switch to the noise reduction and energy saving state, which can reduce ventilation noise and energy consumption; while in an environment where heat dissipation is required, the motor can switch to the heat dissipation and cooling state, which can ensure the heat dissipation capacity of the motor. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure of the motor in Embodiment 1 of this application.

[0043] Figure 2 This is a cross-sectional structural schematic diagram of the motor in Embodiment 1 of this application.

[0044] Figure 3This is a control flow diagram of the vibration monitoring mechanism in Embodiment 1 of this application.

[0045] Figure 4 This is a schematic diagram of the internal structure of the motor in Embodiment 1 of this application.

[0046] Figure 5 This is a schematic diagram of the overall structure of the stator, rotor, self-aligning mechanism, first mounting assembly and second mounting assembly of Embodiment 1 of this application.

[0047] Figure 6 This is a schematic diagram of the overall structure of the stator, rotor, self-aligning mechanism, first mounting assembly and second mounting assembly from another perspective of Embodiment 1 of this application.

[0048] Figure 7 This is a schematic diagram of the overall structure of the motor in Embodiment 2 of this application.

[0049] Figure 8 This is a schematic diagram of the overall structure of the fan bracket in Embodiment 2 of this application.

[0050] Figure 9 This is a cross-sectional structural schematic diagram of the active heat dissipation mechanism of Embodiment 2 of this application.

[0051] Figure 10 yes Figure 9 A magnified schematic diagram of part A in the middle.

[0052] In the diagram, 1. Outer shell; 11. Square tube shell; 111. Side plate; 12. Front end cover; 121. First long sliding hole; 13. Rear end cover; 131. Second long sliding hole; 132. Sliding connecting groove; 133. Sliding connecting seat; 14. First mounting assembly; 141. Bearing seat; 142. Connecting plate; 15. Second mounting assembly; 151. Mounting sleeve; 2. Stator; 3. Rotor; 4. Shaft; 5. Self-aligning mechanism; 51. First fine-tuning assembly; 511. Power source; 512. Fine-tuning screw; 513. Fine-tuning slide; 52. 53. Fine-tuning component; 531. Sliding support component; 532. Slide rail; 533. Slide seat; 54. Brake component; 6. Vibration monitoring mechanism; 61. Controller; 62. Accelerometer; 7. Active cooling mechanism; 71. Cooling fan; 72. Fan bracket; 73. Automatic switching component; 731. Telescopic sleeve; 7311. Inner tube; 7312. Outer tube; 732. Switching drive component; 7321. Permanent magnet; 7322. Electromagnet; 74. Magnetic coupler; 741. Conductor turntable; 742. Permanent magnet turntable; 75. Ventilation hood. Detailed Implementation

[0053] The following is in conjunction with the appendix Figure 1 - Appendix Figure 10 This application will be described in further detail below.

[0054] Example 1: A noise-reducing and energy-saving single-phase AC motor, referring to... Figure 1 and Figure 2 The system includes a housing 1, a stator 2, a rotor 3, and a shaft 4. The shaft 4 is coaxially mounted inside the housing 1, with both ends extending out of the housing 1. The rotor 3 and stator 2 are coaxially mounted inside the housing 1, with the rotor 3 coaxially sleeved on the outside of the shaft 4 and fixedly connected to it. The stator 2 is coaxially sleeved on the outside of the rotor 3, and the stator 2 and rotor 3 are spaced apart. The stator 2, rotor 3, and shaft 4 are all movably connected to the housing 1. A self-aligning mechanism 5 is also provided inside the housing 1, and the shaft 4 and stator 2 are connected to the self-aligning mechanism 5.

[0055] The arrangement of stator 2 and rotor 3 enables the basic functions of the motor. Furthermore, the self-aligning mechanism 5 adjusts the relative positions of the shaft 4 and stator 2, thereby adjusting the relative positions of rotor 3 and stator 2, and consequently adjusting the coaxiality of stator 2 and rotor 3. This ensures that the air gap between rotor 3 and stator 2 is as uniform as possible, reducing motor vibration and noise.

[0056] In this embodiment, refer to Figure 1 and Figure 3 The motor also includes a vibration monitoring mechanism 6, which includes a controller 61 and several accelerometers 62. The several accelerometers 62 are all mounted on the housing 1, and the accelerometers 62 are electrically connected to the controller 61, and the controller 61 is electrically connected to the self-aligning mechanism 5.

[0057] The accelerometer 62 is set up to monitor the vibration state of the motor in real time. After the accelerometer 62 acquires the amplitude and frequency of the vibration signal, it will transmit these data as feedback signals to the controller 61. By analyzing these vibration data, the controller 61 can determine the degree and direction of the rotor 3's eccentricity in real time. This provides a decision basis for the precise compensation action of the self-aligning mechanism 5, thereby ensuring the coaxiality of the rotor 3 and the stator 2.

[0058] Reference Figure 2 and Figure 4 The outer shell 1 includes a square tube shell 11, which is arranged axially in the horizontal direction. One end of the square tube shell 11 is provided with a front end cover 12 and the other end is provided with a rear end cover 13. Both the front end cover 12 and the rear end cover 13 are connected to the square tube shell 11 by bolts, and the front end cover 12 and the rear end cover 13 close the square tube shell 11.

[0059] Reference Figure 2 and Figure 4The front cover 12 has a first long sliding hole 121 and the rear cover 13 has a second long sliding hole 131. The length directions of the first long sliding hole 121 and the second long sliding hole 131 are the same, and the first long sliding hole 121 and the second long sliding hole 131 are directly opposite each other along the axial direction of the square tube shell 11.

[0060] Reference Figure 2 and Figure 4 The outer casing 1, through the combined design of the square tube shell 11, the front cover 12 and the rear cover 13, can form a closed shell, which provides protection and a mounting base for the stator 2 and the rotor 3.

[0061] In this embodiment, refer to Figure 2 and Figure 4 The rotor 3 and stator 2 are coaxially arranged inside the square tube shell 11, and one end of the rotating shaft 4 is inserted into the first long sliding hole 121 and the other end is inserted into the second long sliding hole 131. The inner sidewalls of the first long sliding hole 121 and the second long sliding hole 131 are spaced apart from the outer sidewall of the rotating shaft 4.

[0062] Due to the design of the first long sliding hole 121 and the second long sliding hole 131, both ends of the rotating shaft 4 can extend outside the housing 1, which ensures that the rotating shaft 4 of the motor can be connected to an external load. At the same time, the opening of the first long sliding hole 121 and the second long sliding hole 131 also allows the rotating shaft 4 to be adjusted along the length direction of the first long sliding hole 121, which satisfies the adjustment function of the core adjusting mechanism on the rotor 3.

[0063] In this embodiment, refer to Figure 2 and Figure 4 The square tube shell 11 includes four side plates 111. The side plates 111 are arranged along the axial direction of the rotor 3 in the length direction. Several side plates 111 are arranged at intervals along the circumference of the rotating shaft 4. The side plates 111 are bolted to the corresponding adjacent side plates 111 on both sides in the width direction. The side plates 111 are connected to the front cover 12 and the rear cover 13 on both sides in the length direction.

[0064] The structural design of the square tube shell 11 facilitates its assembly, which in turn facilitates the assembly of the outer casing 1. Simultaneously, it also facilitates the disassembly and assembly of the rotor 3, stator 2, and self-aligning mechanism 5 within the outer casing 1, thereby improving the maintainability and maintenance efficiency of the motor.

[0065] Reference Figure 4 and Figure 5 A first mounting assembly 14 is provided inside the square tube shell 11. The first mounting assembly 14 includes two bearing seats 141. The two bearing seats 141 are spaced apart along the axial direction of the square tube shell 11, and the bearing seats 141 are slidably connected to the inner wall of the square tube shell 11 along the length direction of the first long sliding hole 121.

[0066] Reference Figure 4 and Figure 5 The rotating shaft 4 is inserted into the bearing housing 141 and is rotatably connected to the bearing housing 141. The two bearing housings 141 are spaced apart along the axial direction of the rotating shaft 4, and the stator 2 and the rotor 3 are both located between the two bearing housings 141.

[0067] In this embodiment, a bearing is installed inside the bearing housing 141, and the bearing is sleeved on the outside of the rotor 3, which realizes the rotational connection between the rotating shaft 4 and the bearing housing 141.

[0068] Reference Figure 4 and Figure 5 A connecting plate 142 is provided between the two bearing seats 141. The connecting plate 142 is horizontally positioned, and its lower side is parallel to and spaced apart from the corresponding inner sidewall of the square tube shell 11. The length direction of the connecting plate 142 is along the spacing direction of the two bearing seats 141, and both ends of the connecting plate 142 are fixedly connected to the corresponding bearing seats 141 along its own length direction. The connecting plate 142 is located outside the rotor 3, and the connecting plate 142 is spaced apart from the outer sidewall of the rotor 3.

[0069] Reference Figure 4 and Figure 5 The first mounting assembly 14, through the cooperation of two bearing seats 141 and a connecting plate 142, realizes the installation of the rotating shaft 4, which in turn realizes the installation of the rotor 3, ensuring that the rotor 3 can rotate normally within the housing 1. At the same time, since the bearing seats 141 are slidably connected to the inner wall of the square tube housing 11, the positions of the rotor 3 and the rotating shaft 4 can be adjusted synchronously.

[0070] Reference Figure 2 and Figure 5 The self-aligning mechanism 5 includes a first fine-tuning component 51 and a second fine-tuning component 52. The first fine-tuning component 51 is rotatably connected to the rotating shaft 4, and the second fine-tuning component 52 is connected to the stator 2. In this embodiment, the first fine-tuning component 51 and the second fine-tuning component 52 have the same structure. This embodiment will be described using the specific structure of the first fine-tuning component 51 as an example.

[0071] Reference Figure 5 and Figure 6 The first fine-tuning component 51 includes a power source 511, a fine-tuning screw 512, and a fine-tuning slide 513. The fine-tuning slide 513 is located on the lower side of the connecting plate 142 and is connected to the connecting plate 142. The fine-tuning screw 512 is axially arranged along the width direction of the connecting plate 142, and the fine-tuning screw 512 is screwed to the fine-tuning slide 513.

[0072] Reference Figure 4 and Figure 5 Both ends of the fine-tuning screw 512 extend to the outside of the square tube shell 11, and both ends of the fine-tuning screw 512 are rotatably connected to the square tube shell 11.

[0073] Reference Figure 4 and Figure 6 The power source 511 is located outside the square tube shell 11, and the power source 511 is coaxially connected to the fine-tuning screw 512.

[0074] The first fine-tuning component 51, through the coordinated design of the power source 511, the fine-tuning screw 512, and the fine-tuning slide 513, allows the fine-tuning screw 512 to rotate when the power source 511 drives it to rotate. The fine-tuning screw 512 then drives the fine-tuning slide 513 to move along its own axis. Since the fine-tuning slide 513 is connected to the connecting plate 142, it can synchronously drive the rotating shaft 4 and the rotor 3 to move along the axis of the fine-tuning screw 512, thereby achieving fine-tuning of the rotor 3.

[0075] In this embodiment, refer to Figure 3 and Figure 6 The power source 511 is electrically connected to the controller 61. This allows the controller 61 to directly output fine-tuning data to control the operation of the corresponding power source 511 to achieve fine-tuning of the rotor 3, which can automatically compensate for the eccentricity between the rotor 3 and the stator 2.

[0076] In this embodiment, refer to Figure 4 and Figure 6 The power source 511 can be an electric motor. Specifically, the power source 511 can be a stepper motor or a servo motor. The power source 511 is connected to the outer wall of the square tube shell 11. The output shaft of the power source 511 is coaxially fixedly connected to the fine-tuning screw 512 or detachably connected.

[0077] In this embodiment, refer to Figure 4 and Figure 6 There are two first fine-tuning components 51, which are spaced apart along the axial direction of the square tube shell 11. The stator 2 is located between the two first fine-tuning components 51 along its own axial direction. The two first fine-tuning components 51 work synchronously, which can improve the stability of the rotor 3 fine-tuning.

[0078] Reference Figure 2 and Figure 5 The self-aligning mechanism 5 also includes two sliding support assemblies 53, which are respectively arranged in correspondence with the bearing housing 141, and the sliding support assemblies 53 are arranged on the lower side of the corresponding bearing housing 141.

[0079] Reference Figure 4 and Figure 5 The sliding support assembly 53 includes a slide rail 531 and a slide block 532. The slide rail 531 is located below the corresponding bearing seat 141 and is disposed on the inner wall of the square tube shell 11. The length direction of the slide rail 531 is arranged along the axial direction of the fine-tuning screw 512 inside the first fine-tuning assembly 51. The slide block 532 is slidably disposed on the slide rail 531, and the upper side of the slide block 532 is connected to the corresponding bearing seat 141.

[0080] Therefore, the arrangement of the two sliding support components 53 enables a sliding connection between the bearing housing 141 and the square tube shell 11. Simultaneously, it improves the sliding stability of the bearing housing 141, thereby enhancing the stability of the rotor 3's fine-tuning.

[0081] Reference Figure 4 and Figure 5 The square tube shell 11 is also provided with a second mounting assembly 15. The second mounting assembly 15 includes two mounting sleeves 151. Both mounting sleeves 151 are located on the outside of the stator 2 and are fixedly connected to the stator 2. The two mounting sleeves 151 are spaced apart along the width direction of the connecting plate 142 and are slidably connected to the inner wall of the square tube shell 11 in the vertical direction.

[0082] Reference Figure 4 and Figure 5 There are two second fine-tuning components 52. Each second fine-tuning component 52 is configured to correspond one-to-one with the mounting sleeve 151, and the second fine-tuning component 52 is configured between the corresponding mounting sleeve 151 and the inner wall of the square tube shell 11.

[0083] Reference Figure 4 and Figure 5 The second fine-tuning component 52 has the same structure as the first fine-tuning component 51. The fine-tuning screw 512 in the second fine-tuning component 52 is set in the vertical direction, and the mounting sleeve 151 is connected to the fine-tuning slide 513.

[0084] Reference Figure 5 The cooperation between the second mounting component 15 and the second fine-tuning component 52 enables the stator 2 to be adjusted in the vertical direction.

[0085] In this embodiment, refer to Figure 4 and Figure 5 Two sliding support components 53 are provided between the mounting sleeve 151 and the inner wall of the square tube shell 11. The two sliding support components 53 are spaced apart along the length of the connecting plate 142, and the corresponding second fine-tuning component 52 is located between the two sliding support components 53.

[0086] Based on the sliding support assembly 53 between the mounting sleeve 151 and the inner wall of the square tube shell 11, a sliding connection between the mounting sleeve 151 and the corresponding inner wall of the square tube shell 11 is realized, while improving the stability of the stator 2 fine adjustment.

[0087] Reference Figure 5With the cooperation of the first fine-tuning component 51 and the second fine-tuning component 52, the fine-tuning direction of the first fine-tuning component 51 driving the rotor 3 and the fine-tuning direction of the second fine-tuning component 52 driving the stator 2 are set perpendicular to each other. Furthermore, the fine-tuning direction of the first fine-tuning component 51 driving the rotor 3 and the fine-tuning direction of the second fine-tuning component 52 driving the stator 2 are both set perpendicular to the axial direction of the rotor 3. This allows the relative movement of the rotor 3 and the stator 2 to adjust the coaxiality of the rotor 3 and the stator 2, thereby fulfilling the function of the self-aligning mechanism 5.

[0088] Reference Figure 5 and Figure 6 The self-aligning mechanism 5 also includes several brake assemblies 54, each brake assembly 54 being configured in a one-to-one correspondence with a fine-tuning screw 512. The brake assembly 54 is coaxially connected to the corresponding fine-tuning screw 512, and the brake assembly 54 is located at the end of the corresponding fine-tuning screw 512 that is away from the corresponding power source 511 along its own axial direction.

[0089] Reference Figure 4 and Figure 5 The brake assembly 54 is located on the outside of the square tube shell 11 and is connected to the outer wall of the square tube shell 11. In this embodiment, the brake assembly 54 adopts an electromagnetic brake or a mechanical brake.

[0090] Based on the configuration of the brake assembly 54, when the brake assembly 54 is energized or opened, it releases the corresponding fine-tuning screw 512 from its lock, allowing the fine-tuning screw 512 to rotate and thus enabling fine-tuning of the stator 2 or rotor 3. Conversely, when the brake assembly 54 is de-energized or closed, it locks the corresponding fine-tuning screw 512, preventing it from rotating. This prevents vibration from causing the fine-tuning screw 512 to rotate slightly, thus avoiding changes in the position of the stator 2 or rotor 3. This ensures the stability of the motor structure and reduces motor noise.

[0091] The implementation principle of this application embodiment is as follows: Due to the existence of processing errors and assembly errors of motor parts, as well as the wear of the motor after a long period of time, the rotor 3 and stator 2 will become eccentric, resulting in uneven air gap between stator 2 and rotor 3, which in turn leads to magnetic field distortion and electromagnetic noise; in addition, uneven air gap will also cause rotor 3 to be subjected to unidirectional magnetic pull, resulting in bearing load imbalance and mechanical noise.

[0092] Based on the existence of electromagnetic and mechanical noise, after assembling the motor, the position of the rotor 3 and stator 2 is finely adjusted by the self-aligning mechanism 5, thereby improving the coaxiality of the rotor 3 and stator 2, so that the air gap between the stator 2 and rotor 3 can be uniform again, which can reduce the generation of electromagnetic and mechanical noise.

[0093] The main fine-tuning principle is as follows: When the motor is running or being tested, the motor is started, and the vibration spectrum of the motor is detected in real time by the accelerometer 62 to identify the characteristic frequency of electromagnetic noise and calculate the eccentricity direction of the rotor 3 and stator 2. When the motor is turned off, all brake assemblies 54 release the corresponding fine-tuning screws 512. The first fine-tuning assembly 51 and the second fine-tuning assembly 52 work synchronously to automatically align the rotor 3 and stator 2, changing the coaxiality of the rotor 3 and stator 2. The above steps are repeated until the vibration spectrum of the motor detected by the accelerometer 62 meets the requirements.

[0094] When assembling the motor, the first fine-tuning component 51 and the second fine-tuning component 52 can be manually controlled to fine-tune the position of the rotor 3 and the stator 2. Then, by observing the vibration of the motor, the position of the rotor 3 and the stator 2 can be changed accordingly until the vibration of the motor is reduced to meet the requirements. At this time, the coaxiality of the rotor 3 and the stator 2 meets the requirements.

[0095] Example 2: A noise-reducing and energy-saving single-phase AC motor, referring to... Figure 7 and Figure 8 The difference between this embodiment and embodiment 1 is that an active heat dissipation mechanism 7 is also provided at one axial end of the outer shell 1.

[0096] Reference Figure 7 and Figure 9 The active cooling mechanism 7 includes a cooling fan 71, which is coaxially spaced with the square tube shell 11. The rear end cover 13 is located between the square tube shell 11 and the cooling fan 71. The cooling fan 71 is coaxially arranged with the rotating shaft 4, and one end of the rotating shaft 4 is detachably connected to the cooling fan 71 coaxially.

[0097] Under the action of the cooling fan 71, when the rotor 3 rotates, the cooling fan 71 rotates synchronously. At this time, the cooling fan 71 enables the motor to actively dissipate heat, ensuring improved heat dissipation efficiency.

[0098] Reference Figure 8 and Figure 9 The active cooling mechanism 7 includes a fan bracket 72, a cooling fan 71 coaxially disposed inside the fan bracket 72, the cooling fan 71 is rotatably connected to the fan bracket 72, and one side of the cooling fan 71 is slidably connected to the rear end cover 13. The end of the rotating shaft 4 facing the cooling fan 71 is inserted into the fan bracket 72, the rotating shaft 4 is slidably connected to the fan bracket 72 along its own axis, and the rotating shaft 4 is rotatably connected to the fan bracket 72.

[0099] The fan bracket 72 enables the installation of the cooling fan 71 and also protects the cooling fan 71.

[0100] Reference Figure 7 and Figure 8An automatic switching component 73 is provided between the fan frame 72 and the rear cover 13. The automatic switching component 73 includes a telescopic sleeve 731, which is coaxially sleeved on the outside of the rotating shaft 4. One end of the telescopic sleeve 731 is slidably connected to the rear cover 13, and the other end is coaxially connected to the fan frame 72.

[0101] Based on the design of the telescopic sleeve 731, when the fan frame 72 can move along the axial direction of the rotating shaft 4, the telescopic sleeve 731 can extend and retract synchronously, thereby ensuring the stability of the connection between the fan frame 72 and the rear cover 13.

[0102] In this embodiment, refer to Figure 9 and Figure 10 The telescopic sleeve 731 includes an inner tube 7311 and an outer tube 7312. The outer tube 7312 is coaxially sleeved on the outside of the inner tube 7311, and the outer tube 7312 is slidably connected to the inner tube 7311 along its own axial direction. The inner tube 7311 is coaxially sleeved on the outside of one end of the rotating shaft 4, and the outer wall of the rotor 3 is spaced apart from the inner wall of the inner tube 7311. The inner tube 7311 and the outer tube 7312 are located between the rear end cover 13 and the fan frame 72. The end of the inner tube 7311 away from the outer tube 7312 along its own axial direction is slidably connected to the rear end cover 13, and the end of the outer tube 7312 away from the inner tube 7311 along its own axial direction is coaxially connected to the fan frame 72.

[0103] The telescopic sleeve 731 achieves its function through the cooperative design of the inner tube 7311 and the outer tube 7312.

[0104] In this embodiment, refer to Figure 9 and Figure 10 The outer tube 7312 is connected to the fan frame 72 by bolts. The rear end cover 13 has a sliding connection groove 132 on the side facing the fan frame 72. The second long sliding hole 131 is opened at the bottom of the sliding connection groove 132, and the length direction of the sliding connection groove 132 is set along the length direction of the second long sliding hole 131. A sliding connection seat 133 is inserted into the sliding connection groove 132. The sliding connection seat 133 is slidably connected to the inner side wall of the sliding connection groove 132 along the length direction of the sliding connection groove 132, and the sliding connection seat 133 is connected to one end of the inner tube 7311 by bolts.

[0105] Therefore, with the cooperation of the sliding connecting groove 132 and the sliding connecting seat 133, a sliding connection between the telescopic sleeve 731 and the rear end cover 13 is achieved.

[0106] Reference Figure 8 The automatic switching component 73 also includes a switching drive 732, which is located between the rear cover 13 and the fan bracket 72.

[0107] In this embodiment, refer to Figure 8 and Figure 10The switching drive unit 732 includes a permanent magnet 7321 and an electromagnet 7322. The permanent magnet 7321 is disposed on the rear end cover 13, and the electromagnet 7322 is disposed on the fan bracket 72. The length direction of the electromagnet 7322 is arranged along the length direction of the second long sliding hole 131, and the electromagnet 7322 and the permanent magnet 7321 are positioned opposite each other.

[0108] In the design of the switching drive unit 732 and the telescopic sleeve 731, when the electromagnet 7322 is energized in the forward direction, the permanent magnet 7321 and the electromagnet 7322 repel each other. At this time, the fan bracket 72 moves away from the rear end cover 13, and the telescopic sleeve 731 is lengthened, increasing the distance between the cooling fan 71 and the rear end cover 13. Conversely, when the electromagnet 7322 is energized in the reverse direction, the permanent magnet 7321 and the electromagnet 7322 attract each other. At this time, the fan bracket 72 moves towards the rear end cover 13, and the telescopic sleeve 731 is shortened, decreasing the distance between the cooling fan 71 and the rear end cover 13.

[0109] In this embodiment, the switching drive unit 732 can also be a linear driver, which can more accurately control the distance between the fan bracket 72 and the rear cover 13.

[0110] Reference Figure 9 and Figure 10 A magnetic coupler 74 is provided between the rotating shaft 4 and the cooling fan 71. The magnetic coupler 74 includes a conductor disk 741 and a permanent magnet disk 742. The conductor disk 741 and the permanent magnet disk 742 are coaxially arranged inside the fan frame 72. The permanent magnet disk 742 is coaxially connected to one end of the rotating shaft 4, and the permanent magnet disk 742 is slidably and rotatably connected to the inner wall of the fan frame 72. The conductor disk 741 is coaxially connected to the cooling fan 71, and the conductor disk 741 and the permanent magnet disk 742 are arranged opposite each other at intervals.

[0111] Reference Figure 9 and Figure 10 Based on the structural design of the magnetic coupler 74, when the rotor 3 rotates, the permanent magnet disk 742 rotates synchronously. At this time, the relative motion between the conductor disk 741 and the permanent magnet disk 742 will induce eddy currents in the conductor disk 741, thereby generating a magnetic field in the conductor disk 741. The magnetic field of the conductor disk 741 interacts with the magnetic field of the permanent magnet disk 742, thereby generating a drag torque on the conductor disk 741, thereby driving the conductor disk 741 to rotate, and thus driving the cooling fan 71.

[0112] Reference Figure 8 and Figure 9Based on the working principle of the magnetic coupler 74, with the cooperation of the switching drive component 732 and the telescopic sleeve 731, when the electromagnet 7322 is energized in the forward direction, the cooling fan 71 moves away from the rear end cover 13. This increases the distance between the permanent magnet turntable 742 and the conductor turntable 741. At this time, the permanent magnet turntable 742 cannot drive the conductor turntable 741 to rotate synchronously, thus the motor does not have a cooling effect and can reduce ventilation noise. Conversely, when the electromagnet 7322 is energized in the reverse direction, the cooling fan 71 moves towards the rear end cover 13, which reduces the distance between the permanent magnet turntable 742 and the conductor turntable 741. At this time, the permanent magnet turntable 742 drives the conductor turntable 741 to rotate synchronously, thus the motor has active cooling capability, and the corresponding ventilation noise will increase.

[0113] Reference Figure 7 and Figure 9 The active cooling mechanism 7 also includes a ventilation shroud 75, which is coaxially spaced from the square tube shell 11. The rear end cover 13 is located between the ventilation shroud 75 and the square tube shell 11, and the ventilation shroud 75 and the rear end cover 13 are detachably connected. The ventilation shroud 75 has several ventilation micro-holes. The cooling fan 71, fan bracket 72, automatic switching component 73 and magnetic coupler 74 are all located inside the ventilation shroud 75.

[0114] Based on the ventilation hood 75, the ventilation hood 75 can filter the gas drawn into the motor and prevent impurities from entering the motor.

[0115] In this embodiment, in order to ensure the heat dissipation effect of the active heat dissipation mechanism 7, through holes can be opened on the front cover 12 and the rear cover 13 to ensure the normal flow of heat dissipation airflow.

[0116] The implementation principle of this application embodiment is as follows: when the ambient temperature is low or the noise requirement is high, the electromagnet 7322 in the switching drive component 732 is energized in the forward direction, and the distance between the permanent magnet turntable 742 and the conductor turntable 741 increases, which causes the magnetic coupler 74 to disconnect. At this time, the rotating shaft 4 cannot drive the cooling fan 71 to rotate synchronously, and the cooling fan 71 does not work, which can eliminate ventilation noise.

[0117] Conversely, when the ambient temperature is high or the noise level requirement is low, the electromagnet 7322 inside the switching drive unit 732 is energized in reverse, and the distance between the permanent magnet turntable 742 and the conductor turntable 741 is reduced. This makes the magnetic coupler 74 connected, and at this time the rotating shaft 4 drives the cooling fan 71 to rotate synchronously. The cooling fan 71 works, which enables the motor to actively dissipate heat.

[0118] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A noise-reducing and energy-saving single-phase AC motor, characterized in that, include: The enclosure (1), stator (2), rotor (3) and shaft (4) are provided. The rotor (3) is coaxially mounted on the shaft (4). The rotor (3) is fixedly connected to the shaft (4). The stator (2) is coaxially mounted on the outside of the rotor (3). The stator (2) and the rotor (3) are spaced apart. The stator (2), rotor (3) and shaft (4) are all located inside the enclosure (1). Both ends of the shaft (4) extend out of the enclosure (1). The stator (2), rotor (3) and shaft (4) are all movably connected to the housing (1). The housing (1) is provided with a self-aligning mechanism (5). The self-aligning mechanism (5) includes a first fine-tuning component (51) and a second fine-tuning component (52). The first fine-tuning component (51) is rotatably connected to the shaft (4), and the second fine-tuning component (52) is connected to the stator (2). The driving directions of the first fine-tuning component (51) and the second fine-tuning component (52) are perpendicular to each other, and the driving directions of the first fine-tuning component (51) and the second fine-tuning component (52) are both perpendicular to the axial direction of the shaft (4). The outer casing (1) is provided with a first mounting assembly (14), which includes two bearing seats (141). The two bearing seats (141) are spaced apart along the axial direction of the rotating shaft (4). The rotating shaft (4) is inserted into the bearing seats (141) and is rotatably connected to the bearing seats (141). The rotor (3) and the stator (2) are both located between the two bearing seats (141). The bearing seats (141) are slidably connected to the inner wall of the outer casing (1). A connecting plate (142) is provided between the two bearing seats (141), and both bearing seats (141) are connected to the connecting plate (142). The connecting plate (142) is provided at intervals on the outside of the stator (2). The first fine-tuning component (51) is disposed on the housing (1), and the connecting plate (142) is connected to the first fine-tuning component (51).

2. The noise-reducing and energy-saving single-phase AC motor according to claim 1, characterized in that, The first fine-tuning component (51) includes a power source (511), a fine-tuning screw (512), and a fine-tuning slide (513). The fine-tuning slide (513) is connected to the connecting plate (142). The fine-tuning screw (512) is screwed to the fine-tuning slide (513). Both ends of the fine-tuning screw (512) in the length direction are rotatably connected to the outer shell (1). The power source (511) is located on the outside of the outer shell (1), and one end of the fine-tuning screw (512) is coaxially connected to the power source (511).

3. The noise-reducing and energy-saving single-phase AC motor according to claim 2, characterized in that, The outer casing (1) is also provided with a brake assembly (54), which is connected to the side wall of the outer casing (1). The end of the fine adjustment screw (512) away from the power source (511) along its own axis is coaxially connected to the brake assembly (54). The brake assembly (54) is used to lock the fine adjustment screw (512).

4. The noise-reducing and energy-saving single-phase AC motor according to claim 1, characterized in that, It also includes an active heat dissipation mechanism (7), which includes a cooling fan (71) located outside the housing (1) and is coaxially and detachably connected to the rotating shaft (4).

5. The noise-reducing and energy-saving single-phase AC motor according to claim 4, characterized in that, The active heat dissipation mechanism (7) also includes a fan frame (72), the heat dissipation fan (71) is coaxially disposed in the fan frame (72), and the heat dissipation fan (71) is rotatably connected to the fan frame (72); A telescopic sleeve (731) is provided between the fan frame (72) and the outer shell (1). One end of the telescopic sleeve (731) is coaxially connected to the fan frame (72), and the other end is connected to the outer shell (1). The telescopic sleeve (731) is coaxially sleeved on the outside of the rotating shaft (4), and the telescopic sleeve (731) is spaced apart from the rotating shaft (4). A magnetic coupler (74) is provided between the rotating shaft (4) and the cooling fan (71). The magnetic coupler (74) includes a conductor disk (741) and a permanent magnet disk (742). The conductor disk (741) and the permanent magnet disk (742) are coaxially arranged in the fan frame (72), and both the conductor disk (741) and the permanent magnet disk (742) are rotatably connected to the fan frame (72). The permanent magnet disk (742) is coaxially connected to the rotating shaft (4), the conductor disk (741) is coaxially connected to the cooling fan (71), and the permanent magnet disk (742) is coaxially opposite to the conductor disk (741).

6. The noise-reducing and energy-saving single-phase AC motor according to claim 5, characterized in that, The conductor turntable (741) is slidably connected to the fan frame (72) along its own axis, and one end of the telescopic sleeve (731) is slidably connected to the outer shell (1).

7. A noise-reducing and energy-saving single-phase AC motor according to claim 5, characterized in that, A switching drive (732) is provided between the fan frame (72) and the housing (1), and the switching drive (732) is used to drive the fan frame (72) to move along the axial direction of the rotating shaft (4).

8. A noise-reducing and energy-saving single-phase AC motor according to claim 5, characterized in that, The active heat dissipation mechanism (7) also includes a ventilation hood (75), which is connected to the outer shell (1), and the ventilation hood (75) has several ventilation micro-holes. The cooling fan (71), fan bracket (72), telescopic sleeve (731) and magnetic coupler (74) are all located inside the ventilation hood (75).

9. A noise-reducing and energy-saving single-phase AC motor according to claim 1, characterized in that, The outer casing (1) includes a square tube shell (11), the stator (2) and the rotor (3) are both located inside the square tube shell (11), and the first fine-tuning component (51) and the second fine-tuning component (52) are both disposed on the square tube shell (11); The square tube shell (11) is provided with a front end cover (12) at one end and a rear end cover (13) at the other end. The front end cover (12) and the rear end cover (13) are detachably connected to the square tube shell (11), and the front end cover (12) and the rear end cover (13) both close the square tube shell (11). The front end cover (12) is provided with a first long sliding hole (121), and the rear end cover (13) is provided with a second long sliding hole (131). The length direction of the first long sliding hole (121) is set along the length direction of the second long sliding hole (131). One end of the rotating shaft (4) is inserted into the first long sliding hole (121), and the other end is inserted into the second long sliding hole (131). The inner sidewalls of the first long sliding hole (121) and the second long sliding hole (131) are spaced apart from the rotating shaft (4). The first fine-tuning component (51) is used to drive the rotor (3) to move along the length direction of the first long sliding hole (121).

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