CN108390500B

CN108390500B - Noise reduction combined mechanism based on brushless motor and special fan

Info

Publication number: CN108390500B
Application number: CN201810125794.2A
Authority: CN
Inventors: 胡君晓; 邬振迁; 吴敏
Original assignee: Zhejiang Xierfu Electric Co Ltd
Current assignee: Zhejiang Xierfu Electric Co Ltd
Priority date: 2018-02-08
Filing date: 2018-02-08
Publication date: 2020-05-08
Anticipated expiration: 2038-02-08
Also published as: CN108390500A

Abstract

The invention discloses a special noise reduction combination mechanism based on a brushless motor and a fan, which comprises a base, wherein a handle seat is installed at the top of the base, an outer rotor is arranged on the outer side of an inner stator, one end of the inner stator is connected with a rotating shaft, a main ventilation opening is formed in one end of a ventilation pipeline, a fixing plate is installed on the outer side of the ventilation pipeline, a bolt is arranged on the fixing plate, and a sound absorption layer is arranged inside a secondary ventilation opening. The spring washer is arranged at the joint of the rotating shaft and the fan bearing, so that noise generated when the rotating shaft of the motor moves can be reduced, the guide columns are arranged on the outer side of the fan bearing and are positioned on the inner wall of the fan, and the guide columns are matched with an oblique angle between the fan blade and the wind and rain bearing, so that when strong noise generated by the fan blade is spread along an air inlet channel in an outward countercurrent manner, a shock wave is formed, the sound energy is greatly attenuated, the bottom of the air conduit is provided with the secondary vent, and the sound absorption layer is arranged inside the secondary vent, so that the noise generated when the fan works is reduced.

Description

Noise reduction combined mechanism based on brushless motor and special fan

Technical Field

The invention relates to a brushless motor, in particular to a noise reduction combination mechanism based on the brushless motor and special for a fan.

Background

The brushless direct current motor is a typical electromechanical integration product, because the brushless direct current motor runs in an automatic control mode, a starting winding is not additionally arranged on a rotor like a synchronous motor which is started under heavy load under variable frequency and speed regulation, and oscillation and desynchronization can not be generated when the load suddenly changes.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a special noise reduction combination mechanism based on a brushless motor and a fan, which can reduce the noise generated when a rotating shaft of the motor moves and reduce the noise generated when the fan works.

In order to solve the technical problems, the invention provides the following technical scheme:

the invention relates to a noise reduction combination mechanism based on a brushless motor and a fan, which comprises a base, wherein a handle seat is arranged at the top of the base, a groove is formed in the outer side of the base, reinforcing ribs are arranged in the groove, a positioning groove is formed in one side of the groove and is respectively positioned on two sides of the base, a main motor is arranged in the base, an inner stator is arranged in the main motor, an outer rotor is arranged on the outer side of the inner stator, a rotating shaft is connected to one end of the inner stator, the fan is arranged at one end of the rotating shaft, a fan bearing is arranged in the center of the inner part of the fan, a through hole is formed in the fan bearing, the rotating shaft extends to the outer side of the fan bearing through the through hole, a spring washer is arranged at the joint of the rotating shaft and the fan bearing, and a plurality, and the water conservancy diversion post is located the inner wall of fan, a plurality of fan blades are still installed in the outside of fan bearing, and the fan blade is located the outer wall of fan, and forms the oblique angle between fan blade and the fan bearing, air pipe is installed to the one end of base, main vent has been seted up to air pipe's one end, the secondary vent has been seted up to air pipe's bottom, the fixed plate is installed in air pipe's the outside, be provided with the bolt on the fixed plate, the inside of secondary vent is provided with the sound absorbing layer.

As a preferable technical scheme of the invention, the main motor is in transmission connection with the fan bearing through a rotating shaft.

As a preferable technical scheme of the invention, the reinforcing rib is made of aluminum alloy materials.

As a preferable technical solution of the present invention, the spring washer is a wave spring washer.

In a preferred embodiment of the present invention, the sound absorbing layer is made of a sound absorbing cotton material.

As a preferred technical solution of the present invention, the ventilation duct is fixedly connected to the base through a fixing plate.

As a preferred technical solution of the present invention, the diversion column is arc-shaped.

The spring washer is arranged at the joint of the rotating shaft and the fan bearing, so that noise generated when the rotating shaft of the motor moves can be reduced, the guide columns are arranged on the outer side of the fan bearing and are positioned on the inner wall of the fan, and the guide columns are matched with an oblique angle between the fan blade and the wind and rain bearing, so that when strong noise generated by the fan blade is spread along an air inlet channel in an outward countercurrent manner, a shock wave is formed, the sound energy is greatly attenuated, the bottom of the air conduit is provided with the secondary vent, and the sound absorption layer is arranged inside the secondary vent, so that the noise generated when the fan works is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of a fan configuration of the present invention;

FIG. 2 is a schematic view of the connection structure of the base and the fan of the present invention;

FIG. 3 is a schematic view of the overall structure of the present invention;

FIG. 4 is a schematic view of the internal structure of the base of the present invention;

fig. 5 is a schematic view of the internal structure of the ventilation duct of the present invention;

in the figure: 1. a base; 2. a handle base; 3. a groove; 4. reinforcing ribs; 5. positioning a groove; 6. an inner stator; 7. an outer rotor; 8. a rotating shaft; 9. a fan; 10. a fan bearing; 11. a spring washer; 12. a flow guide column; 13. a fan blade; 14. a through hole; 15. a ventilation duct; 16. a primary vent; 17. a secondary vent; 18. a fixing plate; 19. a bolt; 20. a sound absorbing layer; 21. a main motor.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Wherein like reference numerals refer to like parts throughout.

In addition, if a detailed description of the known art is not necessary to show the features of the present invention, it is omitted. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example 1

As shown in fig. 1-5, the invention provides a noise reduction combination mechanism based on a brushless motor and a fan, comprising a base 1, a handle seat 2 is installed on the top of the base 1, a groove 3 is installed on the outer side of the base 1, a reinforcing rib 4 is installed inside the groove 3, a positioning groove 5 is installed on one side of the groove 3, the positioning groove 5 is respectively located on two sides of the base 1, a main motor 21 is installed inside the base 1, an inner stator 6 is installed inside the main motor 21, an outer rotor 7 is installed on the outer side of the inner stator 6, one end of the inner stator 6 is connected with a rotating shaft 8, a fan 9 is installed at one end of the rotating shaft 8, a fan bearing 10 is installed at the center inside of the fan 9, a through hole 14 is opened inside the fan bearing 10, the rotating shaft 8 extends to the outer side of the fan bearing 10 through the through hole 14, a, the noise generated by the movement of the rotating shaft 8 driven by the main motor 21 can be reduced, the noise generated when the rotating shaft 8 rotates along with the outer rotor 7 in the main motor 21 is prevented, the outer side of the fan bearing 10 is provided with a plurality of guide columns 12, the guide columns 12 are positioned on the inner wall of the fan 9 and matched with the oblique angle between the fan blade 13 and the wind and rain bearing 10, when strong noise generated by the fan blade 13 is transmitted along an air inlet channel in an outward countercurrent manner, a sound shock wave is formed, great attenuation of sound energy is caused, the outer side of the fan bearing 10 is also provided with a plurality of fan blades 13, the fan blades 13 are positioned on the outer wall of the fan 9, an oblique angle is formed between the fan blades 13 and the fan bearing 10, one end of the base 1 is provided with a ventilating duct 15, one end of the ventilating duct 15 is provided with a main ventilating opening 16, the bottom of the, the inside of the sub-vents 17 is provided with a sound absorbing layer 20.

The main motor 21 is in transmission connection with the fan bearing 10 through the rotating shaft 8, and the main motor 21 drives the fan bearing 10 to rotate through the rotating shaft 8, so that the fan blades 13 can rotate conveniently.

The reinforcing ribs 4 are made of aluminum alloy materials, the aluminum alloy is a non-ferrous metal structural material which is most widely applied in the industry, and is widely applied in the aviation, aerospace, automobile, mechanical manufacturing, ship and chemical industries, the rapid development of industrial economy increases the demand on aluminum alloy welding structural parts, the research on the weldability of the aluminum alloy is also deepened, the aluminum alloy has low density, high strength, better plasticity than high-quality steel, can be processed into various sections, has excellent electrical conductivity, thermal conductivity and corrosion resistance, is widely used in the industry, is second only to steel in use amount, and can enhance the structural stability of the base 1.

The spring washer 11 is a wave spring washer, and the wave spring washer is installed at the joint of the rotating shaft 8 and the fan bearing 10, so that the noise generated by the movement of the rotating shaft 8 driven by the main motor 21 can be reduced, and the noise generated when the rotating shaft 8 rotates along with the outer rotor 7 in the main motor 21 is prevented.

The sound absorption layer 20 is made of sound absorption cotton material, the sound absorption cotton material is artificial inorganic fiber, quartz sand, limestone and dolomite natural ore are used as main raw materials, some soda ash and borax chemical raw materials are matched to be melted into glass, and in a melting state, flocculent fine fiber is thrown by means of external force blowing, and the fiber are crossed and mutually wound to present a plurality of fine gaps, so that the sound absorption layer has a good sound absorption effect, and noise transmitted by the fan 9 can be absorbed.

The ventilation duct 15 is fixedly connected with the base 1 through a fixing plate 18, and the ventilation duct 15 is fixed at one end of the base 1 through a bolt 19 on the fixing plate 18, so that the wind of the fan 9 can be conveniently transmitted out through the ventilation duct 15.

The guide column 12 is arc-shaped, so that the function of integrating air flow is conveniently achieved, and when strong noise generated by the fan blade 13 is transmitted along the air inlet channel in an outward countercurrent mode, acoustic shock waves are formed by matching the oblique angle between the fan blade 13 and the wind and rain bearing 10, and the acoustic energy is greatly attenuated.

Specifically, a handle seat 2 is installed at the top of a base 1 to facilitate holding, a groove 3 is formed in the outer side of the base 1, a reinforcing rib 4 is installed in the groove 3 to enhance the structural stability of the base 1, a positioning groove 5 is formed in one side of the groove 3 and is respectively located on two side sides of the base 1 to facilitate the positioning of the base 1 on required motor equipment, a main motor 21 is arranged in the base 1, an inner stator 6 is arranged in the main motor 21, an outer rotor 7 is arranged on the outer side of the inner stator 6, one end of the inner stator 6 is connected with a rotating shaft 8 and rotates along with the outer rotor 7, a fan 9 is installed at one end of the rotating shaft 8, a fan bearing 10 is installed in the center of the fan 9, a through hole 14 is formed in the fan bearing 10, the rotating shaft 8 extends to the outer side of the fan bearing 10 through the through hole 14, and a spring washer 11 is installed at, the outer side of the fan bearing 10 is provided with a plurality of guide columns 12, the guide columns 12 are positioned on the inner wall of the fan 9 and matched with the oblique angle between the fan blade 13 and the wind and rain bearing 10, when strong noise generated by the fan blade 13 is spread along the air inlet channel in an outward countercurrent way, forming acoustic shock waves to cause great attenuation of acoustic energy, wherein one end of the base 1 is provided with a ventilation pipeline 15, one end of the ventilation pipeline 15 is provided with a main ventilation opening 16, the bottom of the ventilation pipeline 15 is provided with a secondary ventilation opening 17, which accords with the anti-sound principle, the accessible and the phase difference between the main sound source form noise reduction, and fixed plate 18 is installed in ventilation pipe 15's the outside, is provided with bolt 19 on the fixed plate 18, conveniently dismantles ventilation pipe 15 and base 1 and separates through bolt 19, and the inside of inferior vent 17 is provided with sound absorbing layer 20, can absorb the noise that fan 9 spreads, noise reduction.

According to the invention, the spring washer 11 is arranged at the joint of the rotating shaft 8 and the fan bearing 10, so that the noise generated when the rotating shaft of the motor moves can be reduced, the guide columns 12 are arranged on the outer side of the fan bearing 10, the guide columns 12 are positioned on the inner wall of the fan 9, and the oblique angle between the fan blade 13 and the wind and rain bearing 10 is matched, so that when strong noise generated by the fan blade 13 is spread along an air inlet channel in an outward countercurrent manner, a shock wave is formed, and the sound energy is greatly attenuated, the bottom of the ventilation pipeline 15 is provided with the secondary ventilation opening 17, and the sound absorption layer 20 is arranged inside the secondary ventilation opening 17, so that the noise generated when the fan 9 works is reduced.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A noise reduction combination mechanism based on a brushless motor and a fan is special, and comprises a base (1) and is characterized in that a handle seat (2) is installed at the top of the base (1), a groove (3) is formed in the outer side of the base (1), reinforcing ribs (4) are installed inside the groove (3), a positioning groove (5) is formed in one side of the groove (3), the positioning grooves (5) are respectively located on two sides of the base (1), a main motor (21) is arranged inside the base (1), an inner stator (6) is arranged inside the main motor (21), an outer rotor (7) is arranged outside the inner stator (6), a rotating shaft (8) is connected to one end of the inner stator (6), a fan (9) is installed at one end of the rotating shaft (8), and a fan bearing (10) is installed in the center of the fan (9), the fan bearing is characterized in that a through hole (14) is formed in the fan bearing (10), the rotating shaft (8) extends to the outer side of the fan bearing (10) through the through hole (14), a spring washer (11) is installed at the joint of the rotating shaft (8) and the fan bearing (10), a plurality of guide columns (12) are arranged on the outer side of the fan bearing (10), the guide columns (12) are located on the inner wall of the fan (9), a plurality of fan blades (13) are further installed on the outer side of the fan bearing (10), and an oblique angle between each fan blade (13) and the corresponding fan bearing (10) is matched, so that when strong noise generated by the corresponding fan blade (13) is spread along an air inlet channel in an outward countercurrent mode, a sound shock wave is formed, great attenuation of sound energy is caused, each fan blade (13) is located on the outer wall of the fan (9), an oblique angle is formed between each fan blade (13) and the corresponding fan bearing (10), main vent (16) have been seted up to the one end of air pipe (15), inferior vent (17) have been seted up to the bottom of air pipe (15), fixed plate (18) are installed in the outside of air pipe (15), be provided with bolt (19) on fixed plate (18), the inside of inferior vent (17) is provided with sound absorbing layer (20).

2. The combined noise reduction mechanism based on the brushless motor and the special fan is characterized in that the main motor (21) is in transmission connection with the fan bearing (10) through the rotating shaft (8).

3. The special noise reduction combination mechanism based on the brushless motor and the fan as claimed in claim 1, wherein the reinforcing ribs (4) are made of an aluminum alloy material.

4. The combined noise reduction mechanism based on the brushless motor and the special fan as claimed in claim 1, wherein the spring washer (11) is a wave spring washer.

5. The noise reduction combination mechanism based on the brushless motor and the special fan as claimed in claim 1, wherein the sound absorption layer (20) is made of sound absorption cotton material.

6. The special noise reduction combination mechanism based on the brushless motor and the fan as claimed in claim 1, wherein the ventilation duct (15) is fixedly connected with the base (1) through a fixing plate (18).

7. The combined noise reduction mechanism based on the brushless motor and the fan as claimed in claim 1, wherein the flow guiding pillar (12) is arc-shaped.