A low noise permanent magnet motor

Abstract

The utility model relates to the field of permanent magnet motor discloses a low noise permanent magnet motor, including the casing, the middle part of casing is provided with the stator, the middle part of stator is provided with the rotor, the stator and casing are commonly installed with the buffer ring and the number is multiple, the middle part of casing is through and is fixedly connected with the fin and the number is multiple, the one end fixed connection of fin is close to stator limit piece, the outer wall of limit piece and buffer ring abuts, multiple the sound insulation layer is established between the fin, in the utility model, through setting up the mutual cooperation between casing and fin and sound insulation layer, buffer ring and other components, can carry out the buffer protection of certain degree when the motor runs to the noise of motor operation can be absorbed and reduced, can be forced airflow along the axial horizontal flow through setting up rectifier grid to reduce airflow noise, reduce the noise when the motor runs, more practical.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet motors, and in particular to a low-noise permanent magnet motor. Background Technology

[0002] Permanent magnet motors are a type of motor that uses permanent magnets to generate magnetic fields. They are widely used in various industries, transportation, and daily life. They have advantages such as high efficiency, small size, simple structure, and fast response, and are therefore very popular in fields such as new energy vehicles, robots, model airplanes, air conditioners, and home appliances.

[0003] Existing permanent magnet motors generate significant noise during operation, primarily from electromagnetic forces, mechanical vibrations, and aerodynamics. Without an effective buffer structure, mechanical vibrations can occur, leading to noise. Alternatively, an improperly designed cooling fan can cause turbulent airflow, generating aerodynamic noise. Excessive noise not only affects the stability and reliability of the motor's operation but also negatively impacts the surrounding environment and operators, reducing user comfort and making the motor impractical. Therefore, a low-noise permanent magnet motor is proposed to address these issues. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a low-noise permanent magnet motor, which aims to improve the problem that existing permanent magnet motors generate a lot of noise during operation, mainly from electromagnetic force, mechanical vibration and aerodynamics. For example, without an effective buffer structure, mechanical vibration and noise are caused, or the shape design of the cooling fan is unreasonable, which can lead to turbulent airflow and aerodynamic noise.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a low-noise permanent magnet motor, comprising a housing, a stator disposed in the middle of the housing, a rotor disposed in the middle of the stator, multiple buffer rings jointly installed between the stator and the housing, multiple heat sinks passing through and fixedly connected to the middle of the housing, a limiting plate fixedly connected to one end of each heat sink near the stator, the limiting plate abutting against the outer wall of the buffer ring, a sound insulation layer disposed between each of the multiple heat sinks, the sound insulation layer being fixedly connected to the inner wall of the housing, and a rectifier grid fixedly connected to the rear part of the inner wall of the housing.

[0006] As a further description of the above technical solution:

[0007] The inner wall of the buffer ring has multiple flow guide ports.

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

[0009] An end cap is fixedly connected to the front end of the housing.

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

[0011] A cooling fan is provided at the front of the rectifier grid, and the cooling fan is fixedly connected to the inner wall of the casing.

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

[0013] A rotating rod is fixedly connected to the middle of the rotor, and the rotating rod passes through and is rotatably connected to the end cover.

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

[0015] The stator has multiple liquid cooling cavities in its middle section.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, by setting up the cooperation between the casing, heat sink, sound insulation layer, buffer ring and other components, a certain degree of buffer protection can be provided for the motor during operation, thereby absorbing and reducing the noise of the motor during operation. At the same time, by setting up the rectifier grid, the airflow can be forced to flow horizontally along the axial direction, thereby reducing airflow noise and reducing the noise of the motor during operation, which is more practical.

[0018] 2. In this utility model, by setting up the cooperation between components such as heat sink, cooling fan and liquid cooling cavity, the heat dissipation efficiency of the motor during operation can be improved, thereby protecting the motor and extending its service life, making it more practical. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a low-noise permanent magnet motor proposed in this utility model.

[0020] Figure 2 This is a three-dimensional cross-sectional structural diagram of the casing of a low-noise permanent magnet motor proposed in this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the housing, rectifier grid, cooling fan, and stator of a low-noise permanent magnet motor proposed in this utility model.

[0022] Legend:

[0023] 1. Housing; 2. Rotor; 3. Stator; 4. Buffer ring; 11. Heat sink; 12. Sound insulation layer; 13. End cover; 15. Rectifier grid; 16. Cooling fan; 111. Limiting plate; 31. Liquid cooling cavity; 41. Flow guide; 21. Rotating rod. Detailed Implementation

[0024] 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.

[0025] Reference Figure 1 - Figure 3 The present invention provides an embodiment of a low-noise permanent magnet motor, comprising a housing 1, which is the outer shell of the permanent magnet motor, and a heat dissipation filter plate at the rear of the housing 1 for facilitating gas flow and preventing dust from entering the motor. A stator 3 is disposed in the middle of the housing 1, and a rotor 2 is disposed in the middle of the stator 3. The stator 3 and the rotor 2 cooperate with each other. Multiple buffer rings 4 are installed between the stator 3 and the housing 1. The buffer rings 4 can be made of rubber or other materials. Multiple guide holes 41 are opened on the inner wall of the buffer rings 4 for facilitating the flow of heat dissipation air.

[0026] Furthermore, a plurality of heat sinks 11 are fixedly connected through and fixedly connected to the middle of the housing 1 for heat exchange. A limiting piece 111 is fixedly connected to one end of the heat sink 11 near the stator 3 for installation limiting in conjunction with sound insulation, etc. Due to contact with the heat dissipation airflow, the limiting piece 111 abuts against the outer wall of the buffer ring 4. A sound insulation layer 12 is provided between the plurality of heat sinks 11. The sound insulation layer 12 can be a porous sound-absorbing material. Thermally conductive fibers are provided in both the sound insulation layer 12 and the buffer ring 4 for heat dissipation while reducing noise. The sound insulation layer 12 is fixedly connected to the inner wall of the housing 1. A rectifier grid 15 is fixedly connected to the rear part of the inner wall of the housing 1 for forcing the airflow to flow axially, thereby reducing the noise during airflow. A cooling fan 16 is provided in front of the rectifier grid 15 for heat dissipation. The cooling fan 16 is fixedly connected to the inner wall of the housing 1.

[0027] Furthermore, the front end of the housing 1 is fixedly connected to an end cover 13, and the middle of the rotor 2 is fixedly connected to a rotating rod 21, which is the output shaft of the motor. The rotating rod 21 passes through and is rotatably connected to the end cover 13. The middle of the stator 3 has multiple liquid cooling chambers 31, which are used to connect with the oil cooling pipes to help dissipate heat from the motor.

[0028] Working principle: When the permanent magnet motor is running, the stator 3 and the rotor 2 cooperate with each other. The rotation of the rotor 2 drives the rotating rod 21 to rotate, realizing the power output of the motor. When the motor generates noise, the multiple buffer rings 4 installed between the housing 1 and the stator 3 can effectively buffer the vibration transmission between the stator 3 and the housing 1, thereby reducing the noise caused by vibration. At the same time, the sound insulation layer 12 set between the multiple heat sinks 11 can absorb some noise, further enhancing the sound insulation effect. In addition, the rectifier grid 15 at the rear of the inner wall of the housing 1 can force the airflow to flow axially, greatly reducing the noise generated when the airflow flows, thus reducing the noise source from the perspective of airflow.

[0029] Meanwhile, when the motor is running, the heat sink 11 is connected to the middle of the housing 1 through and fixedly, which can work together to exchange heat and transfer the heat inside the motor. The operation of the cooling fan 16 will promote airflow, and the rectifier grid 15 guides the airflow along the axial direction. The multiple guide ports 41 on the inner wall of the buffer ring 4 cooperate with the airflow to allow the airflow to carry away heat more smoothly. The multiple liquid cooling cavities 31 opened in the middle of the stator 3 can be connected to oil cooling pipes to assist in heat dissipation through liquid cooling. In addition, the heat-conducting fibers in the sound insulation layer 12 and the buffer ring 4 can reduce noise while transferring heat and improve heat dissipation efficiency, further ensuring the heat dissipation effect of the motor during operation and enabling the motor to work stably.

[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 low-noise permanent magnet motor, comprising a housing (1), characterized in that: A stator (3) is provided in the middle of the housing (1), and a rotor (2) is provided in the middle of the stator (3). Multiple buffer rings (4) are installed between the stator (3) and the housing (1). The housing (1) has multiple heat sinks (11) that are fixedly connected through the middle. A limiting plate (111) is fixedly connected to one end of the heat sink (11) near the stator (3). The limiting plate (111) abuts against the outer wall of the buffer ring (4). A sound insulation layer (12) is provided between the multiple heat sinks (11). The sound insulation layer (12) is fixedly connected to the inner wall of the housing (1). A rectifier grid (15) is fixedly connected to the rear part of the inner wall of the housing (1).

2. The low-noise permanent magnet motor according to claim 1, characterized in that: The inner wall of the buffer ring (4) has multiple flow guide ports (41).

3. A low-noise permanent magnet motor according to claim 1, characterized in that: The front end of the housing (1) is fixedly connected to an end cap (13).

4. A low-noise permanent magnet motor according to claim 1, characterized in that: A cooling fan (16) is provided at the front of the rectifier grid (15), and the cooling fan (16) is fixedly connected to the inner wall of the casing (1).

5. A low-noise permanent magnet motor according to claim 2, characterized in that: A rotating rod (21) is fixedly connected to the middle of the rotor (2), and the rotating rod (21) is connected to the end cover (13) through and rotatably.

6. A low-noise permanent magnet motor according to claim 1, characterized in that: The stator (3) has multiple liquid cooling cavities (31) in the middle.

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