High-speed motor with noise reduction function

Abstract

The utility model relates to the technical field of high-speed motors, and discloses a high-speed motor with a noise reduction function, which comprises a driving shaft which is a main body of the whole device and is used for supporting the device. The rotor assembly is used for driving and acts on the driving device to rotate; the stator assembly is used for conversion and acts on energy conversion; the rotor assembly comprises fan blades, the fan blades are arranged on the outer walls of the fan blades, a bearing assembly is arranged at the bottoms of the fan blades, a magnet is arranged at the bottom of the bearing assembly, and the magnet is arranged on the outer wall of the driving shaft. According to the utility model, when the whole device is driven to operate through the rotor assembly, gaps between an inner ring and a ball and gaps between an outer ring and a ball can be smaller through the top spring, the top bearing and the outer ring spring or the top bearing and the outer ring spring at different positions by the internal bearing in a double-spring mode; therefore, high-frequency sound of the ball bearing frequency in the device operation process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of high-speed motor technology, and in particular to a high-speed motor with noise reduction function. Background Technology

[0002] High-speed motors play a crucial role in numerous fields of modern industry and daily life. They are widely used in power tools, home appliances, and industrial automated production lines, highly favored for their high-efficiency output due to their high rotational speed. For example, in hair dryers, high-speed motors can quickly drive the fan blades to rotate, generating a strong airflow and significantly reducing drying time; in precision machining equipment, high-speed motors provide high-speed and stable rotational power for cutting tools, ensuring machining accuracy and efficiency. However, with continuous technological advancements and increasingly demanding performance requirements for equipment, the noise problem during the operation of high-speed motors, while pursuing high speed and high power density, has become increasingly prominent, posing a significant technical challenge that urgently needs to be addressed.

[0003] Traditional high-speed motors typically employ a fairly conventional mechanical structure. Their stator generally consists of an iron core and windings. The iron core provides a path for magnetic flux, while the windings generate a rotating magnetic field when alternating current is applied. The rotor is mostly a wound-rotor or squirrel-cage type. Wound-rotor motors control speed and other performance characteristics by adjusting the current through an external resistor, while squirrel-cage motors have a simpler structure, rotating based on the interaction between induced current and the magnetic field. For bearings, most use ordinary ball bearings, which support the rotor's rotation through the rolling of balls between the inner and outer rings, ensuring stable motor operation. This traditional structure is mature in long-term industrial applications, but it lacks effective, targeted designs to address the noise issues generated by high-speed operation.

[0004] However, existing high-speed motors have a significant problem during operation. Due to the extremely high speed of high-speed motors, ordinary ball bearings inevitably experience strong vibrations during prolonged high-speed operation due to frequent contact and friction between the balls and the inner and outer rings, as well as the unbalanced forces generated by high-speed rotation. This vibration generates high-frequency sounds at the ball bearing frequency, which not only causes serious noise pollution to the surrounding environment, interfering with people's normal work and life, but also leads to fatigue damage to other internal components of the motor over a long period of time, reducing the overall service life and reliability of the motor, increasing equipment maintenance costs and repair frequency, and greatly limiting the promotion and use of high-speed motors in applications with high noise requirements. Therefore, a high-speed motor with noise reduction function is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a high-speed motor with noise reduction function, which aims to improve the problem of large noise generated during high-frequency operation in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-speed motor with noise reduction function includes a drive shaft, which is the main body of the entire device and serves to support the device; a rotor assembly, which is the drive and serves to drive the rotation of the device; and a stator assembly, which is the converter and serves to convert energy. The rotor assembly includes a fan blade, which is disposed on the outer wall of the fan blade. A bearing assembly is disposed at the bottom of the fan blade, and a magnet is disposed at the bottom of the bearing assembly. The magnet is disposed on the outer wall of the drive shaft.

[0008] As a further description of the above technical solution:

[0009] The bearing assembly may include a top spring, an outer spring, and an inner spring. The top spring is sleeved on the outer wall of the drive shaft, and the top of the top spring is disposed at the bottom of the fan blade. A top bearing is disposed at the bottom of the top spring, and the top bearing is disposed inside the outer wall of the drive shaft. The inner spring is sleeved on the outer wall of the drive shaft, and the bottom of the inner spring is disposed at the top of the magnet. A bottom bearing is disposed at the top of the inner spring, and the top bearing and the bottom bearing are disposed at both ends of the outer spring.

[0010] As a further description of the above technical solution:

[0011] The bearing assembly may further include an outer ring spring and an inner ring spring. The outer ring spring is sleeved on the outer wall of the drive shaft. A top bearing is fixedly connected to the top of the outer ring spring. The top bearing is located on the outer wall of the drive shaft and at the bottom of the fan blade. The inner ring spring is sleeved on the outer wall of the drive shaft. A bottom bearing is located at the bottom of the inner ring spring. The bottom bearing is fixedly connected to the top of the magnet. The inner ring spring is located inside the outer ring spring.

[0012] As a further description of the above technical solution:

[0013] The stator assembly includes an air duct, which is disposed on the outer wall of the drive shaft;

[0014] As a further description of the above technical solution:

[0015] A stator is installed inside the air duct, and the stator is disposed on the outer wall of the magnet;

[0016] As a further description of the above technical solution:

[0017] The stator is fixedly connected to the bottom of an enameled wire, and the bottom of the enameled wire is fixedly connected to a PCB board. The bottom of the PCB board is provided with terminals.

[0018] This utility model has the following beneficial effects:

[0019] In this invention, when the rotor assembly drives the entire device to operate, the internal bearing can be made smaller by using a double-spring configuration of a top spring, a top bearing, and an outer ring spring, or a top bearing and an outer ring spring at different positions. This reduces the high-frequency noise of the ball bearing during device operation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a high-speed motor with noise reduction function proposed in this utility model;

[0021] Figure 2 A schematic diagram of the top spring of a high-speed motor with noise reduction function proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of a magnet for a high-speed motor with noise reduction function proposed in this utility model.

[0023] Figure 4 This is a schematic diagram of the outer ring spring of a high-speed motor with noise reduction function proposed in this utility model.

[0024] Legend:

[0025] 1. Drive shaft; 2. Fan blade; 3. Top spring; 4. Top bearing; 5. Outer ring spring; 6. Bottom bearing; 7. Inner ring spring; 8. Magnet; 9. Air duct; 10. Stator; 11. Enamelled wire; 12. PCB board; 13. Terminal. Detailed Implementation

[0026] 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.

[0027] Reference Figures 1-4This utility model provides an embodiment of a high-speed motor with noise reduction function, including a drive shaft 1, which is carefully crafted from high-strength alloy steel. Its superior mechanical properties, including excellent rigidity and toughness, ensure structural stability even under the harsh operating conditions of high-speed motor operation, providing a reliable foundation for the coordinated work of other components. The drive shaft 1 is the main body of the entire device, serving to support it. The rotor assembly is the drive, driving the rotation of the device. The stator assembly is the converter, converting energy. The rotor assembly includes fan blades 2, which are made of aerospace-grade aluminum alloy and processed using precise aerodynamic design and advanced manufacturing processes. Its unique airfoil structure and reasonable curvature enable it to cut through the air with minimal resistance during high-speed rotation, thereby efficiently converting the rotational mechanical energy of the motor into strong airflow energy. The fan blade 2 is mounted on the outer wall of the fan blade 2, and a bearing assembly is located at the bottom of the fan blade 2. A magnet 8 is located at the bottom of the bearing assembly. The magnet 8 is made of high-quality neodymium iron boron permanent magnet material, which, with its superior magnetic properties, provides a stable and powerful magnetic field foundation for the electromagnetic conversion of the motor. The magnet 8 is located on the outer wall of the drive shaft 1. The bearing assembly may include a top spring 3, an outer spring 5, and an inner spring 7. The top spring 3 is sleeved on the outer wall of the drive shaft 1, and its top is located at the bottom of the fan blade 2. A top bearing 4 is located at the bottom of the top spring 3, and its interior is located on the outer wall of the drive shaft 1. The inner spring 7 is sleeved on the outer wall of the drive shaft 1, and its bottom is located at the top of the magnet 8. A bottom bearing 6 is located at the top of the inner spring 7. The top bearing 4 and the bottom bearing 6 are located at both ends of the outer spring 5. Alternatively, the bearing assembly may also include an outer spring 5 and an inner spring 6. Spring 7, outer spring 5 is sleeved on the outer wall of drive shaft 1, top bearing 4 is fixedly connected to the top of outer spring 5, top bearing 4 is located on the outer wall of drive shaft 1, and bottom bearing 2 is located at the bottom of fan blade 2. Inner spring 7 is sleeved on the outer wall of drive shaft 1, bottom bearing 6 is located at the bottom of inner spring 7, bottom bearing 6 is fixedly connected to the top of magnet 8. Inner spring 7 is located inside outer spring 5, in order to reduce noise. Stator assembly includes air duct 9, air duct 9 is located on the outer wall of drive shaft 1, and air duct 9 is located inside. The stator 10 is made of high-quality silicon steel sheets. The high magnetic permeability and low iron loss characteristics of the silicon steel sheets lay a solid foundation for the efficient transmission of magnetic field and the accurate conversion of electrical energy. The stator 10 is set on the outer wall of the magnet 8. The bottom of the stator 10 is fixedly connected to the enameled wire 11. The enameled wire 11 is made of high-purity copper wire and its surface is uniformly coated with high-quality insulating varnish to ensure the efficiency and safety of current transmission. The bottom of the enameled wire 11 is fixedly connected to the PCB board 12, and the bottom of the PCB board 12 is provided with terminals 13.

[0028] Specifically, when an external power source is connected through terminal 13, the current is rapidly transmitted to the PCB board 12. The control circuit on the PCB board 12 immediately performs meticulous processing and rational distribution of the current. According to the preset control strategy, the appropriate three-phase AC or DC power is precisely delivered to the enameled wire 11 windings of the stator 10. Subsequently, driven by the three-phase AC or DC power, the enameled wire 11 of the stator 10 interacts with the magnetic field generated by the magnets 8 in the rotor section inside the stator core. The system generates a powerful electromagnetic force, which drives the rotor to rotate the drive shaft 1. During the rotation of the drive shaft 1, the fan blade 2 installed at one end rotates at high speed and flows directionally along the air duct 9, ultimately forming a strong and orderly airflow, successfully achieving the blowing function. When the drive shaft 1 rotates, the top bearing 4 and the bottom bearing 6 support the drive shaft 1 and its connected components, ensuring its stable and smooth rotation. The top spring 3, the outer ring spring 5, and the inner ring spring 7, or the outer ring spring 5 and the inner ring spring 7 in different positions, can absorb and disperse the vibration energy generated during the operation of the bearing by buffering impact, providing preload, and cleverly changing the vibration characteristics of the bearing system. This greatly reduces the high-frequency noise caused by vibration, allowing the entire device to operate stably in a quiet and peaceful atmosphere. This effectively ensures the smoothness and reliability of the entire rotating system, bringing users a comfortable and efficient user experience.

[0029] Working principle: When an external power source is connected through terminal 13, the current is transmitted to PCB board 12. The control circuit on PCB board 12 processes and distributes the current, and delivers the appropriate three-phase AC power to the enameled wire 11 winding of stator 10 according to the predetermined control strategy. After the enameled wire 11 of stator 10 is supplied with three-phase AC or DC power, a rotating magnetic field is generated inside the iron core of stator 10. This rotating magnetic field interacts with the magnetic field generated by the magnet 8 of the rotor part, and generates electromagnetic force according to the principle of electromagnetic induction, which causes the rotor to drive the drive shaft 1 to start rotating. During the rotation of drive shaft 1, the fan blade 2 installed at one end of it rotates at high speed. The fan blade 2 continuously cuts the air, accelerates the air and directs it along the air duct 9 to form the required airflow and realize the blowing function. When drive shaft 1 rotates, the top bearing 4 and the bottom bearing 6 jointly support drive shaft 1 and its connected components to ensure stable and smooth rotation. The top spring 3, outer ring spring 5, and inner ring spring 7 work together, or work together through outer ring spring 5 and inner ring spring 7 at different positions. They can all absorb and disperse the vibration energy generated during bearing operation by buffering impact, providing preload, and changing the vibration characteristics of the bearing system. This reduces high-frequency noise caused by vibration and ensures the smoothness and reliability of the entire rotating system.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-speed motor with noise reduction function, characterized in that, include: The drive shaft (1) is the main body of the entire device and is used to support the device. A rotor assembly, which is a drive that drives the rotation of the device; Stator assembly, the stator assembly being a converter, functioning to convert energy; The rotor assembly includes a fan blade (2), the fan blade (2) is disposed on the outer wall of the fan blade (2), a bearing assembly is disposed at the bottom of the fan blade (2), a magnet (8) is disposed at the bottom of the bearing assembly, and the magnet (8) is disposed on the outer wall of the drive shaft (1); The bearing assembly includes a top spring (3), an outer spring (5), and an inner spring (7). The top spring (3) is sleeved on the outer wall of the drive shaft (1). The top of the top spring (3) is located at the bottom of the fan blade (2). A top bearing (4) is located at the bottom of the top spring (3). The top bearing (4) is located inside the outer wall of the drive shaft (1). The inner spring (7) is sleeved on the outer wall of the drive shaft (1). The bottom of the inner spring (7) is located at the top of the magnet (8). A bottom bearing (6) is located at the top of the inner spring (7). The top bearing (4) and the bottom bearing (6) are located at both ends of the outer spring (5).

2. A high-speed motor with noise reduction function according to claim 1, characterized in that: The stator assembly includes an air duct (9) disposed on the outer wall of the drive shaft (1).

3. A high-speed motor with noise reduction function according to claim 2, characterized in that: The air duct (9) is provided with a stator (10), which is located on the outer wall of the magnet (8).

4. A high-speed motor with noise reduction function according to claim 3, characterized in that: The stator (10) is fixedly connected to the bottom of an enameled wire (11), and the bottom of the enameled wire (11) is fixedly connected to a PCB board (12). The bottom of the PCB board (12) is provided with a terminal (13).

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