CN215566741U

CN215566741U - Axial flow fan driven by squirrel-cage disc type self-starting permanent magnet synchronous motor

Info

Publication number: CN215566741U
Application number: CN202120606937.9U
Authority: CN
Inventors: 周磊; 黄诚
Original assignee: Huanyi Electromagnetic Technology Yichang Co ltd
Current assignee: Huanyi Electromagnetic Technology Yichang Co ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2022-01-18
Anticipated expiration: 2031-03-25

Abstract

The utility model discloses a squirrel-cage disc type axial flow fan driven by a self-starting permanent magnet synchronous motor, which comprises a motor and a shell, wherein the front end and the tail end of the shell are respectively provided with an air outlet and an air inlet; the motor comprises a shell, a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are positioned in the shell; the rotor assembly comprises a rotor shaft and a rotor iron core sleeved outside the rotor shaft, an impeller is arranged at the tail end of the rotor shaft, bearings are arranged at two ends of the rotor shaft, and the bearings are mounted on the shell; and the air outlet of the shell is provided with a flow guide silencing cover. According to the utility model, the guide silencing cover is arranged at the air outlet of the axial flow fan, and the guide plate converts vortex airflow generated by rotation of the impeller into linear airflow, so that the energy conversion rate of the axial flow fan is improved; the noise reduction plate is arranged on the guide plate, so that pneumatic noise generated when the axial flow fan works can be reduced.

Description

Axial flow fan driven by squirrel-cage disc type self-starting permanent magnet synchronous motor

Technical Field

The utility model belongs to the technical field of axial flow fan equipment, and particularly relates to a squirrel-cage disc type axial flow fan driven by a self-starting permanent magnet synchronous motor.

Background

The ventilator is a universal machine with wide application range, such as mine ventilation, boiler air introduction and chemical process, and industrial furnace air blowing, air conditioning, building ventilation and the like. The ventilator which is well designed, manufactured and reasonably used has important significance for saving energy and reducing noise pollution.

The low-voltage axial flow fan is used as the main power of industrial equipment and household appliances such as ventilation, heating ventilation, cooling, air conditioning, transportation and the like, so that the low-voltage axial flow fan is widely applied. The axial flow fan has the pneumatic characteristics of low full pressure, large air volume and low impeller efficiency which is usually about 10% lower than that of a centrifugal impeller because a gap is formed between a blade and a pipeline, secondary flow is arranged at the top of the blade, the blade root is connected with a hub, the separated flow is also serious, and a large amount of vortexes are arranged near the blade root and the blade top and even flow back to cause great flow loss.

The noise sources of the fan mainly include aerodynamic noise and mechanical noise. The aerodynamic noise is generated by interaction of the air flow and the fan blades, the air channel, the rectifier and the like, and comprises impact noise, rotation noise, vortex noise and the like. Mechanical noise is generated by friction, shock and vibration between moving parts of the fan. At present, a method for reducing fan noise is divided into two aspects of active noise reduction and passive noise reduction, wherein the active noise reduction is to make a fan emit noise as small as possible, and the passive noise reduction is to make the noise emitted by the fan transmit to an external environment as small as possible.

The axial flow fan has two problems to be solved urgently at present, one is that the axial flow fan is easy to generate low-frequency sound, namely common humming sound, is easy to cause noise pollution, influences the working environment, is not beneficial to long-time work, and how to reduce vibration and noise also becomes a difficult problem in the industry; the other is that when the axial flow fan is used, the flow guiding effect is poor, and the vortex is often generated, so that the problem of low energy conversion rate is caused

Disclosure of Invention

The utility model aims to provide a squirrel-cage disc type axial flow fan driven by a self-starting permanent magnet synchronous motor, aiming at the problems in the prior art.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a squirrel-cage disc type axial flow fan driven by a self-starting permanent magnet synchronous motor comprises a motor and a shell, wherein the motor is arranged in the shell through a bracket; the front end and the tail end of the shell are respectively provided with an air outlet and an air inlet; the motor comprises a shell, a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are positioned in the shell; the rotor assembly comprises a rotor shaft and a rotor iron core sleeved outside the rotor shaft, an impeller is arranged at the tail end of the rotor shaft, bearings are arranged at two ends of the rotor shaft, and the bearings are mounted on the shell; and the air outlet of the shell is provided with a flow guide silencing cover.

Specifically, rotor core includes first rotor core, stator core includes first stator core, first stator core follows first rotor core circumference is installed on the shell inner wall.

Furthermore, the first rotor iron core is of a squirrel-cage structure, and a plurality of magnetic shoes are embedded inside the first rotor iron core, so that the magnetic flux is improved, and the efficiency of the motor is further improved.

Specifically, the rotor core comprises a second rotor core, and the stator core comprises a second stator core; the second rotor core and the second stator core are disc cores, and the second rotor core and the second stator core are arranged at intervals along the axial direction of the rotor shaft. Through setting up disk rotor core and stator core, can further improve the efficiency of motor to reduce fan energy consumption, reduce the volume.

Specifically, the flow guide noise reduction cover comprises a center column and a plurality of flow guide plates which are uniformly arranged along the peripheral surface of the center column, and the center column and the rotor shaft are coaxially arranged. The guide plate can convert vortex airflow generated by rotation of the impeller into linear airflow which is axially transmitted along the rotor shaft, so that the energy conversion rate of the axial flow fan is improved, and meanwhile, the pneumatic noise generated by the vortex airflow is reduced.

Furthermore, a plurality of sound absorption plates are arranged on two side faces of the guide plate, and the sound absorption plates are made of sound absorption materials with porous structures.

Specifically, the axial flow fan further comprises a vibration reduction mechanism, the vibration reduction mechanism comprises a top plate, a bottom plate and a plurality of vibration reducers arranged between the top plate and the bottom plate, and the shell is detachably arranged on the top plate. The vibration reduction mechanism can reduce vibration generated when the axial flow fan works, so that mechanical noise is reduced, and the service life of equipment is prolonged.

Compared with the prior art, the utility model has the beneficial effects that: (1) the utility model can further improve the efficiency of the motor by arranging the disc type rotor core and the disc type stator core, thereby reducing the energy consumption of the fan and reducing the volume; (2) according to the utility model, the guide silencing cover is arranged at the air outlet of the axial flow fan, so that on one hand, the vortex airflow generated by the rotation of the impeller is converted into the linear airflow through the guide plate, and the energy conversion rate of the axial flow fan is improved; on the other hand, the noise reduction plate is arranged on the guide plate, so that the pneumatic noise generated when the axial flow fan works can be reduced; (3) according to the utility model, the axial flow fan is arranged on the vibration reduction mechanism, so that the vibration generated when the axial flow fan works is greatly reduced, the mechanical noise is reduced, and the service life of equipment is prolonged.

Drawings

FIG. 1 is a schematic structural diagram of an axial flow fan driven by a squirrel-cage disc type self-starting permanent magnet synchronous motor according to the present invention;

fig. 2 is a schematic view of the internal structure of the motor in the embodiment of the present invention;

FIG. 3 is a schematic front mounting structure of an axial flow fan according to an embodiment of the present invention;

in the figure: 1. a motor; 2. a housing; 3. a support; 4. a housing; 5. a rotor shaft; 6. an impeller; 7. a bearing; 8. a first rotor core; 9. a first stator core; 10. a magnetic shoe; 11. a second rotor core; 12. a second stator core; 13. a central column; 14. a baffle; 15. a sound-absorbing panel; 16. a top plate; 17. a base plate; 18. a damper.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 3, the present embodiment provides a squirrel-cage disc type axial flow fan driven by a self-starting permanent magnet synchronous motor, which includes a motor 1 and a housing 2, wherein the motor 1 is installed in the housing 2 through a bracket 3; the front end and the tail end of the shell 2 are respectively provided with an air outlet and an air inlet; the motor 1 comprises a shell 4, a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are positioned in the shell 4, and the stator assembly comprises a stator core and a winding wound outside the stator core; the rotor assembly comprises a rotor shaft 5 and a rotor core sleeved outside the rotor shaft 5, an impeller 6 is arranged at the tail end of the rotor shaft 5, bearings 7 are arranged at two ends of the rotor shaft 5, and the bearings 7 are arranged on the shell 4; and an air outlet of the shell 2 is provided with a flow guide silencing cover.

Specifically, rotor core includes first rotor core 8, stator core includes first stator core 9, first stator core 9 follows first rotor core 8 circumference is installed on shell 4 inner wall.

Further, the first rotor core 8 is of a squirrel cage structure, and a plurality of magnetic shoes 10 are embedded inside, so that magnetic flux is improved, and further the efficiency of the motor 1 is improved.

Specifically, the rotor core includes a second rotor core 11, and the stator core includes a second stator core 12; the second rotor core 11 and the second stator core 12 are disk cores, and the second rotor core 11 and the second stator core 12 are axially arranged along the rotor shaft 5 at intervals. Through setting up disk rotor core and stator core, can further improve motor 1's efficiency to reduce the fan energy consumption, reduce the volume.

Specifically, the flow guide noise reduction cover comprises a center column 13 and a plurality of flow guide plates 14 uniformly arranged along the outer peripheral surface of the center column 13, and the center column 13 and the rotor shaft 5 are coaxially arranged. The guide plate 14 can convert vortex airflow generated by rotation of the impeller 6 into linear airflow propagating along the axial direction of the rotor shaft 5, so that the energy conversion rate of the axial flow fan is improved, and meanwhile, the aerodynamic noise generated by the vortex airflow is reduced.

Specifically, in this embodiment, the flow guide noise reduction cover further includes an annular reinforcing rib, the annular reinforcing rib is coaxial with the central column 13, and the plurality of flow guide plates 14 are all fixedly connected with the annular reinforcing rib, so that the flow guide plates 14 can be reduced in vibration under the impact of air flow by arranging the annular reinforcing rib, and the stability of the flow guide plates 14 is improved while the noise is reduced.

Furthermore, a plurality of sound-absorbing plates 15 are arranged on two side surfaces of the guide plate 14, and the sound-absorbing plates 15 are made of sound-absorbing materials with porous structures.

Specifically, the axial flow fan further comprises a vibration damping mechanism, the vibration damping mechanism comprises a top plate 16, a bottom plate 17 and a plurality of vibration dampers 18 arranged between the top plate 16 and the bottom plate 17, and the shell 2 is detachably arranged on the top plate 16. The vibration reduction mechanism can reduce vibration generated when the axial flow fan works, so that mechanical noise is reduced, and the service life of equipment is prolonged.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The axial flow fan driven by the squirrel-cage disc type self-starting permanent magnet synchronous motor is characterized by comprising a motor and a shell, wherein the motor is arranged in the shell through a bracket; the front end and the tail end of the shell are respectively provided with an air outlet and an air inlet; the motor comprises a shell, a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are positioned in the shell; the rotor assembly comprises a rotor shaft and a rotor iron core sleeved outside the rotor shaft, an impeller is arranged at the tail end of the rotor shaft, bearings are arranged at two ends of the rotor shaft, and the bearings are mounted on the shell; and the air outlet of the shell is provided with a flow guide silencing cover.

2. The axial flow fan driven by the squirrel-cage disc type self-starting permanent magnet synchronous motor as claimed in claim 1, wherein the rotor core comprises a first rotor core, and the stator core comprises a first stator core, and the first stator core is circumferentially mounted on the inner wall of the housing along the first rotor core.

3. The axial flow fan driven by the squirrel-cage disc type self-starting permanent magnet synchronous motor as claimed in claim 2, wherein the first rotor core is of a squirrel-cage structure, and a plurality of magnetic tiles are embedded inside the first rotor core.

4. The axial flow fan driven by the squirrel-cage disc type self-starting permanent magnet synchronous motor according to claim 1, wherein the rotor core comprises a second rotor core, and the stator core comprises a second stator core; the second rotor core and the second stator core are disc cores, and the second rotor core and the second stator core are arranged at intervals along the axial direction of the rotor shaft.

5. The axial flow fan driven by the squirrel-cage disc type self-starting permanent magnet synchronous motor according to claim 1, wherein the flow guide noise reduction hood comprises a central column and a plurality of flow guide plates uniformly arranged along the outer peripheral surface of the central column, and the central column is arranged coaxially with the rotor shaft.

6. The axial flow fan driven by the squirrel-cage disc type self-starting permanent magnet synchronous motor according to claim 5, wherein a plurality of sound-absorbing plates are arranged on both side surfaces of the guide plate.

7. The squirrel-cage disc self-starting permanent magnet synchronous motor driven axial flow fan of claim 1, comprising a vibration damping mechanism comprising a top plate, a bottom plate and a plurality of vibration dampers mounted between the top plate and the bottom plate, the housing being removably mounted on the top plate.