CN110545005A - Rotor housing structure, outer rotor motor and washing machine with same - Google Patents

Abstract

The present application provides a rotor housing structure, including: a housing end wall, on which a heat dissipation structure is arranged, and the heat dissipation structure is formed by a plurality of sheet-shaped wind guide plates arranged circumferentially around the rotating shaft, two adjacent Air vents are formed between the wind deflectors. According to the rotor shell structure of the present application, it can not only effectively reduce the pressure pulsation generated during the rotation of the rotor, reduce air noise, but also accelerate the heat dissipation of the motor.

Description

Rotor housing structure, outer rotor motor and washing machine with same

technical field

The application belongs to the technical field of motor heat dissipation, and in particular relates to a rotor shell structure, an outer rotor motor and a washing machine with the same.

Background technique

At present, during the high-speed rotation of the external rotor motor, due to its large size, it is easy to stir the air around the rotor and generate relatively large air noise.

However, the surface of the rotor shell of the washing machine outer rotor motor in the prior art is mostly a grid structure or a rectangular or round hole-shaped air inlet is provided on the surface of the rotor shell, and reinforcing ribs are added on the surface of the rotor shell to strengthen the structure. Intensity, the surface structure of the rotor shell makes the wind pressure flowing through the surface of the rotor shell larger, and the attachment area of the turbulent boundary layer on the surface of the rotor shell is large, making the pressure pulsation large, resulting in large aerodynamic noise, and this air inlet form will lead to poor heat dissipation.

Therefore, how to provide a rotor shell structure that can effectively reduce the pressure pulsation generated during the rotation of the rotor, reduce air noise, and speed up the heat dissipation of the motor, the outer rotor motor and the washing machine with it has become an urgent need for those skilled in the art to solve question.

Contents of the invention

Therefore, the technical problem to be solved in this application is to provide a rotor shell structure, an outer rotor motor and a washing machine with the same, which can not only effectively reduce the pressure pulsation generated during the rotation of the rotor, reduce air noise, but also speed up the motor Heat dissipation.

In order to solve the above problems, the present application provides a rotor housing structure, including:

The end wall of the housing is provided with a heat dissipation structure. The heat dissipation structure is formed by a plurality of sheet-shaped air deflectors arranged circumferentially around the rotation axis, and an air vent is formed between two adjacent air deflectors.

Preferably, it also includes a fixed part; the fixed part, the heat dissipation structure and the rotating shaft are sequentially connected from the edge of the end wall to the center; the first end in the length direction of the sheet-shaped wind deflector is connected to the fixed part, and the second end is connected to the rotating shaft .

Preferably, the width of the wind deflector gradually increases from a position close to the rotation axis to a position away from the rotation axis.

Preferably, at least one side of the wind deflector in the width direction is provided with splitter teeth, and the splitter teeth are used to split the airflow flowing through the surface of the rotor shell.

Preferably, the wind deflector is arranged obliquely relative to the horizontal direction.

Preferably, a plurality of wind deflectors arranged circumferentially around the rotation axis are equidistantly arranged, and the number of wind deflectors is an odd number.

Preferably, a hub is also included, and the hub is arranged on the heat dissipation structure and integrally connected with the sheet-shaped wind deflector.

Preferably, the heat dissipation structure is provided with radial reinforcing ribs.

Preferably, the radial ribs penetrate the air deflector in the thickness direction of the air deflector.

According to still another aspect of the present application, an external rotor motor is provided, including a rotor housing structure, wherein the rotor housing structure is the above rotor housing structure.

According to still another aspect of the present application, a washing machine is provided, including a rotor housing structure, characterized in that the rotor housing structure is the above-mentioned outer rotor motor.

The end wall of the rotor housing structure provided by this application is provided with a heat dissipation structure, and the heat dissipation structure is formed by a plurality of sheet-shaped air deflectors arranged circumferentially around the rotating shaft, and a heat dissipation structure is formed between two adjacent sheet-shaped air deflectors. vent. The flaky wind deflector can cut the airflow and reduce air noise. Moreover, the structure of the wind deflector in this application reduces the overall weight of the rotor, reduces the energy loss during the rotation of the rotor, and improves the efficiency of the motor. This application can also effectively reduce the The pressure pulsation generated during the rotation of the small rotor reduces air noise and speeds up the heat dissipation of the motor.

Description of drawings

Fig. 1 is a structural schematic diagram of a rotor housing structure according to an embodiment of the present application;

Fig. 2 is a schematic structural view of the wind deflector of the embodiment of the present application;

Fig. 3 is a cross-sectional view of the wind deflector of the embodiment of the present application;

Fig. 4 is an enlarged view of area A in Fig. 3;

Fig. 5 is a cross-sectional view of a radial rib according to an embodiment of the present application.

The reference signs are indicated as:

1. Shell end wall; 2. Rotating shaft; 3. Heat dissipation structure; 31. Sheet-shaped wind deflector; 4. Air vent; 5. Fixed part; 6. Splitter tooth; 7. Wheel hub; 8. Radial reinforcement .

Detailed ways

Referring to Fig. 1, according to an embodiment of the present application, a rotor housing structure includes: a housing end wall 1, on which a heat dissipation structure 3 is arranged, and the heat dissipation structure 3 is composed of a plurality of 2 The sheet-shaped wind deflectors 31 arranged in the circumferential direction are formed, and the ventilation openings 4 are formed between two adjacent sheet-shaped wind deflectors 31, in order to facilitate the cutting of air and reduce air noise during the rotation of the motor, and the application of sheet-shaped The structure of the wind deflector 31 reduces the overall weight of the rotor, reduces the energy loss during the rotation of the rotor, and improves the efficiency of the motor

Further, it also includes a fixed part 5; the fixed part 5, the heat dissipation structure 3 and the rotating shaft 2 are sequentially connected from the edge of the housing end wall 1 to the center; connected, and the second end is connected to the rotating shaft 2.

Further, the width of the sheet-shaped wind deflector 31 gradually increases from a position close to the rotating shaft 2 to a direction away from the rotating shaft 2 .

Further, the thickness of the sheet-shaped wind deflector 31 is 2.5mm˜5mm.

Further, the thickness of the sheet-shaped wind deflector 31 is set uniformly.

As shown in FIG. 2 , the present application also discloses some embodiments. At least one side of the sheet-shaped wind deflector 31 in the width direction is provided with splitter teeth 6 , and when the airflow flows through the surface of the rotor shell of the motor, the airflow is divided into strands, thereby The problem of reducing the wind pressure flowing through the surface of the rotor shell, and reducing the attachment area of the turbulent boundary layer on the surface of the rotor shell, thereby reducing the pressure pulsation, thereby reducing the aerodynamic noise.

Further, the number of shunt teeth 6 is an odd number.

Further, the tooth pitch is set as T, T=(radius of the outer edge of the sheet air deflector 31-radius of the root of the sheet air deflector 31)*(1%～2%), and the tooth height is set as h, h=(sheet Shape wind deflector 31 outer edge radius-flaky wind deflector 31 root radius)*(0.6%～0.8%), sawtooth thickness and sheet wind deflector 31 are thick.

Further, the shunt teeth 6 are V-shaped zigzags.

Further, the splitter teeth 6 are tidal or wave-shaped.

Referring to FIG. 3 , the present application also discloses some embodiments. The sheet-shaped wind deflector 31 is arranged obliquely relative to the horizontal direction, which increases the clearance of the air inlet of the sheet-shaped wind deflector 31 and increases the air intake inside the rotor. The air volume is conducive to the air exchange inside and outside the rotor, which solves the problems of low air intake of the rotor and untimely heat dissipation.

Referring to Fig. 4, the present application also discloses some embodiments. The inclination angle a between the sheet-shaped wind deflector 31 and the horizontal plane is 6° to 8°. It is verified by simulation that this angle is beneficial to reduce the noise of the motor. The hollow air can enter the motor through the gap between the inclination angles, and play a cooling effect on the motor.

Furthermore, the sheet-shaped wind deflector 31 on the rotor shell is designed in the shape of a fan blade. During the high-speed rotation of the motor, the function of the splitter tooth 6 is to quickly divert part of the wind pressure, reduce the noise caused by the turbulent air flow, and reduce the wind pressure. At the same time, the splitter tooth 6 is conducive to shearing the air, so that the air flows along the direction of the splitter tooth 6 across the surface of the fan blade. At the same time, it can also form a hedge against the vortex formed at the edge of the fan blade to offset the edge The noise produced by the vortex.

Further, a plurality of sheet-shaped air deflectors 31 arranged circumferentially around the rotating shaft 2 are equidistantly arranged, and the number of sheet-shaped air deflectors 31 is an odd number to prevent resonance of the sheet-shaped air deflectors 31 during the rotation of the motor. Happening.

Further, the wheel hub 7 is also included. The wheel hub 7 is arranged on the heat dissipation structure 3 and integrally connected with the sheet-shaped wind deflector 31 to play the role of a circumferential reinforcing rib, and can reduce the vibration of the sheet-shaped air deflector 31 and reduce the vibration of the sheet-shaped air deflector 31. Small vibration noise.

With reference to FIG. 5 , the present application also discloses some embodiments, where the heat dissipation structure 3 is provided with radial reinforcing ribs 8 .

Further, radial reinforcing ribs 8 are arranged on the sheet-shaped wind deflector 31 .

Further, the radial reinforcing ribs 8 are equidistantly arranged.

Further, the radial reinforcing ribs 8 penetrate through the sheet-shaped air-deflecting plate 31 in the thickness direction of the sheet-shaped air-deflecting plate 31 .

Further, the thickness of the radial reinforcing rib 8 adopts a gradient design. At the end close to the rotating shaft 2, the radial reinforcing rib 8 is thicker and runs through the sheet-shaped wind deflector 31, while at the end far away from the rotating shaft 2, the radial reinforcing rib 8 The ribs 8 are thinner to improve the structural rigidity of the rotor casing.

Further, the sheet-shaped wind deflector 31 is provided with noise reduction holes, and the direction of the noise reduction holes follows the direction of the air streamline when the motor rotates. After the air flows through the holes, a small vortex is formed, which interacts with the original sound field to reduce noise. .

Further, noise reduction grooves are provided on the upper surface of the sheet-shaped wind deflector 31, and the structure of the noise reduction grooves is a pit similar to the surface structure of a golf ball, which conforms to the principle of aerodynamics, and these pits can be reduced when the motor rotates. Air resistance also reduces noise.

Further, the thickness adopts a gradient design. At the end close to the rotating shaft 2, the radial reinforcing ribs 8 are thicker and run through the sheet-shaped wind deflector 31, while at the end far away from the rotating shaft 2, the radial reinforcing ribs 8 are thinner. The radial ribs 8 are equidistantly distributed around the axis of rotation 2 .

According to an embodiment of the present application, an external rotor motor includes a rotor housing structure, wherein the rotor housing structure is the above rotor housing structure.

According to an embodiment of the present application, a washing machine includes a rotor housing structure, wherein the rotor housing structure is the above-mentioned outer rotor motor.

Those skilled in the art can easily understand that, on the premise of no conflict, the above-mentioned advantageous modes can be freely combined and superimposed.

The above are only preferred embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the application should be included in the protection scope of the application. Inside. The above are only the preferred embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the technical principle of the application. These improvements and modifications should also be It is regarded as the scope of protection of this application.

Claims (11)

1. A rotor housing structure, characterized in that it comprises: a housing end wall (1), on which a heat dissipation structure (3) is arranged, and the heat dissipation structure (3) is composed of a plurality of rotating The shaft (2) is formed by sheet-shaped air deflectors (31) arranged circumferentially, and an air vent (4) is formed between two adjacent sheet-shaped air deflectors (31). 2. The rotor housing structure according to claim 1, characterized in that it also includes a fixed part (5); the fixed part (5), the heat dissipation structure (3) and the rotating shaft (2) (1) Edges are connected sequentially toward the center; the first end of the sheet-shaped wind deflector (31) in the length direction is connected to the fixed part (5), and the second end is connected to the rotating shaft (2). 3. The rotor housing structure according to claim 1, characterized in that, the width of the sheet-shaped wind deflector (31) gradually increases from a position close to the rotation axis (2) to a position away from the rotation axis (2). 4. The rotor housing structure according to claim 1, characterized in that at least one side in the width direction of the sheet-shaped wind deflector (31) is provided with a splitter tooth (6), and the splitter tooth (6) ) is used to split the airflow flowing through the surface of the rotor shell. 5. The rotor housing structure according to claim 1, characterized in that, the sheet-shaped wind deflector (31) is arranged obliquely relative to the horizontal direction. 6. The rotor housing structure according to claim 1, characterized in that, the plurality of sheet-shaped wind deflectors (31) arranged circumferentially around the rotating shaft (2) are equidistantly arranged, and the sheet-shaped The quantity of wind deflector (31) is an odd number. 7. The rotor housing structure according to claim 1, characterized in that it further comprises a hub (7), the hub (7) is arranged on the heat dissipation structure (3), and is connected with the sheet-shaped air guide The plates (31) are integrally connected. 8. The rotor housing structure according to claim 1, characterized in that radial reinforcing ribs (8) are arranged on the heat dissipation structure (3). 9. The rotor housing structure according to claim 8, characterized in that, the radial ribs (8) penetrate through the sheet-shaped air-deflecting plate (31) in the thickness direction of the sheet-shaped air-deflecting plate (31). 10. An external rotor motor, comprising a rotor housing structure, characterized in that the rotor housing structure is the rotor housing structure described in any one of claims 1-9. 11. A washing machine comprising a rotor housing structure, characterized in that the rotor housing structure is the outer rotor motor as claimed in claim 10.