A supercharged motor capable of reducing noise

Abstract

The utility model discloses a supercharged motor that can reduce noise. The supercharged motor comprises a shell, a rotor assembly, a stator assembly and an impeller. The shell is provided with an air duct. The air duct is provided with a mounting pipeline. The stator assembly comprises a stator core and a coil winding wound on the stator core. The outer end surface of the stator core and the inner end surface of the mounting pipeline are integrated. The other end of the mounting pipeline is sleeved with a bearing seat. The rotor assembly comprises a shaft and a magnet fixedly installed on the shaft. One end of the shaft penetrates through the center of the bearing seat and is connected with the impeller. The utility model directly integrates the stator core and the mounting pipeline, so that the position deviation of the stator core during subsequent installation or work can be avoided, and the occurrence of electromagnetic noise can be avoided. The same axis design ensures the stability of the rotation of the impeller, thereby reducing noise.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a booster motor that can reduce noise. Background Technology

[0002] Small or micro motors exist among electric motors, such as high-speed permanent magnet brushless DC small motors. These motors have a series of advantages such as high power density, small geometric size, fast dynamic response and high operating efficiency, making them promising for high-speed applications. For example, a high-speed small permanent magnet brushless motor is used in hair dryers.

[0003] However, because these brushless motors are manufactured in small or miniature sizes, the precision required for component installation becomes much higher when operating at high speeds. Existing brushless DC motors are typically designed with the air duct guide plate and stator assembly manufactured separately and then assembled. The rotor bearing is mounted on the stator assembly, with one end connected to the impeller. This design makes it easy for the air duct guide plate and stator shaft (shaft) to become misaligned after installation. This causes the stator to become misaligned under stress, resulting in the guide plate and impeller not being on the originally designed coaxial axis, and the stator core shifting. This leads to related problems such as air noise and electromagnetic noise. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a booster motor that can reduce noise.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A noise-reducing booster motor includes a housing, a rotor assembly, a stator assembly, and an impeller. The housing contains an air duct, and the air duct contains a cylindrical mounting pipe. The stator assembly includes a stator core and coil windings wound around the stator core. The stator core is annular, and its outer end face is integrally formed with the inner end face of the mounting pipe. A bearing housing, cylindrical in shape, is fitted onto the other end of the mounting pipe, with its outer end face interference-fitted into the mounting pipe. The rotor assembly includes a shaft and a magnet fixedly mounted on the shaft. One end of the shaft passes through the center of the bearing housing and connects to the impeller. The shaft is connected to the bearing housing via a bearing. The magnet is placed within the inner ring of the stator core. The portion of the bearing housing exposed outside the mounting pipe has at least one ring of first guide vanes.

[0007] Preferably, the impeller includes an impeller head and blades, the impeller head is frustum-shaped, and the blades are arranged in a ring array on the inclined surface of the impeller head.

[0008] Preferably, the blades are streamlined.

[0009] Preferably, the slope of the impeller head is 50-80°.

[0010] Preferably, the housing is provided with a fan cover at the impeller, and the fan cover is truncated cone-shaped.

[0011] Preferably, the installation pipe is made of insulating material.

[0012] Preferably, the bearing housing is provided with a through hole, which is connected to an installation pipe.

[0013] By adopting the above-mentioned solution, this utility model integrates the stator core with the installation pipe by establishing an installation pipe, thus eliminating concerns about positional displacement of the stator core during subsequent installation or operation and avoiding electromagnetic noise. At the same time, using the installation pipe as a fixed point, the bearing housing is coaxially installed, ensuring that the rotor and impeller shafts are on the same axis as the installation pipe and stator core, thus ensuring stable impeller rotation and reducing noise. Furthermore, the impeller's frustum-shaped design and the streamlined blade design further enhance the pressurization effect. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0015] Figure 2 This is an exploded view of the structure of an embodiment of this utility model.

[0016] Figure 3 This is a schematic diagram of the shell structure according to an embodiment of the present invention.

[0017] Figure 4 This is a cross-sectional view of an embodiment of the present utility model.

[0018] Figure 5 This is a schematic diagram of the impeller structure according to an embodiment of the present invention.

[0019] Figure 6 This is a structural schematic diagram of the bearing housing according to an embodiment of the present utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] like Figures 1 to 6 As shown, this embodiment provides a noise-reducing booster motor, including a housing 1, a rotor assembly 2, a stator assembly 3, and an impeller 4. The housing 1 has an air duct 11 for guiding airflow. The air duct 11 contains a cylindrical mounting pipe 12. The stator assembly 3 includes a stator core 31 and coil windings 32 wound around the stator core 31. The stator core 31 is annular, and its outer end face is integrated with the inner end face of the mounting pipe 12. The mounting pipe 12... The other end is fitted with a bearing housing 5, which is cylindrical, and the outer end face of the bearing housing 5 is interference-fitted into the installation pipe 12. The rotor assembly 2 includes a shaft 21 and a magnet 22 fixedly mounted on the shaft 21. One end of the shaft 21 passes through the center of the bearing housing 5 and is connected to the impeller 4. The shaft 21 is connected to the bearing housing 5 through a bearing 23. The magnet 22 is placed in the inner ring of the stator core 31. The portion of the bearing housing 5 exposed outside the installation pipe 12 is provided with at least one ring of first guide plates 51.

[0024] This embodiment of the invention establishes an installation pipe 12, directly integrating the stator core 31 with the installation pipe 12. This eliminates concerns about positional shifts in the stator core 31 during subsequent installation or operation, thus avoiding electromagnetic noise. Simultaneously, using the installation pipe 12 as a fixed point, the bearing housing 5 is coaxially installed, fixing its position and ensuring that the bearing housing 5 and the axis of the installation pipe 12 are aligned. Since the rotor shaft 21 passes through the center of the bearing housing 5, the shaft 21 is located on the axis. The impeller 4 is mounted on the shaft 21, ensuring that the axes of the rotor, impeller 4, installation pipe 12, and stator core 31 are on the same axis. This ensures that the axes of multiple components are aligned, thus guaranteeing stable impeller rotation and smooth airflow, thereby reducing noise generation.

[0025] Furthermore, to increase wind pressure, the impeller 4 in this embodiment includes an impeller head 41 and blades 42. The impeller head 41 is frustum-shaped, and the blades 42 are arranged in a ring array on the inclined surface of the impeller head 41, wherein the blades 42 are streamlined. The slope α of the inclined surface of the impeller head 41 is 50-80°, and the relationship between the angle and wind pressure is as follows... Figure 5 As shown, the relationship between α and the cross-sectional area enclosed by the meridian is a monotonically decreasing relationship; if α increases (as shown in the figure: the line A1 changes to A2), the cross-sectional area enclosed by the meridian will decrease (cross-sectional area 1 becomes cross-sectional area 2), and the wind pressure will decrease; if α is too small (as shown in the figure: the line A2 changes to A1), the cross-sectional area enclosed by the meridian will increase, and the wind pressure will increase; however, if α is too small, it will affect the wall thickness S, which is set to 50-80°.

[0026] Furthermore, to further increase the wind pressure, the housing 1 in this embodiment is provided with a fan cover 6 at the impeller 4. The fan cover 6 is in the shape of a frustum. With this design, the air outlet of the air duct 11 can be gradually reduced, thereby increasing the wind pressure.

[0027] Furthermore, regarding the material, the installation pipe 12 in this embodiment is made of insulating material, preferably plastic, ceramic or other materials, which are lighter than metal alloys and can also provide insulation protection.

[0028] Furthermore, to facilitate heat dissipation, the bearing housing 5 in this embodiment is provided with a through hole 52, which is connected to the mounting pipe 12. In this way, after the impeller rotates, a portion of the airflow will flow in the mounting pipe 12, thereby carrying away the heat generated by the coil winding 32.

[0029] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A booster motor capable of reducing noise, characterized in that: The system includes a housing, a rotor assembly, a stator assembly, and an impeller. The housing contains an air duct, and the air duct contains a cylindrical mounting pipe. The stator assembly includes a stator core and coil windings wound around the stator core. The stator core is annular, and its outer end face is integrated with the inner end face of the mounting pipe. A cylindrical bearing housing is fitted onto the other end of the mounting pipe, with its outer end face interference-fitted into the mounting pipe. The rotor assembly includes a shaft and a magnet fixedly mounted on the shaft. One end of the shaft passes through the center of the bearing housing and connects to the impeller. The shaft is connected to the bearing housing via a bearing. The magnet is placed in the inner ring of the stator core. The portion of the bearing housing exposed outside the mounting pipe has at least one ring of first guide vanes.

2. The booster motor with noise reduction capability as described in claim 1, characterized in that: The impeller includes an impeller head and blades. The impeller head is truncated cone-shaped, and the blades are arranged in a ring array on the inclined surface of the impeller head.

3. The booster motor with noise reduction capability as described in claim 2, characterized in that: The blades are streamlined.

4. A booster motor with noise reduction capability as described in claim 3, characterized in that: The slope of the impeller head is 50-80°.

5. A booster motor with noise reduction capability as described in claim 1, characterized in that: The housing has a fan cover located at the impeller, and the fan cover is shaped like a frustum.

6. A booster motor with noise reduction capability as described in claim 1, characterized in that: The installation pipe is made of insulating material.

7. A booster motor with noise reduction capability as described in claim 1, characterized in that: The bearing housing is provided with a through hole, which is connected to the installation pipe.

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