CN218030739U

CN218030739U - Coaxial contrarotating fan

Info

Publication number: CN218030739U
Application number: CN202222538250.3U
Authority: CN
Inventors: 周家葆; 杨壮壮; 王轩; 刘宇航; 罗德会
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2022-12-13
Anticipated expiration: 2032-09-23

Abstract

The utility model provides a coaxial counter-rotating fan, include: the axial magnetic flux disc type counter-rotating motor comprises a disc stator and a pair of disc rotors which are coaxially arranged on a motor shaft, wherein the pair of disc rotors are respectively positioned on two sides of the disc stator, and the number of poles of permanent magnets of the pair of disc rotors is the same; two groups of fan blades are respectively and correspondingly arranged on the pair of disc rotors, and the two groups of fan blades are respectively and correspondingly driven by the pair of disc rotors to reversely rotate around the motor shaft at a constant speed. The utility model provides a coaxial contra-rotating fan utilizes axial flux disc formula to counter-rotating motor drive to counter-rotate double-vane fan structure, because two fan blade group structures, rotational speed are the same and turn to on the contrary, and angular momentum can be eliminated in the balance of each other to two fan blade groups, vibration and noise when reducing the fan operation. Meanwhile, the fan motor is short in axial length, small in size, high in power density, convenient to detach and maintain, capable of achieving a larger wind sweeping working range in a bidirectional wind blowing mode and a double-fan small-amplitude rotating mode, and high in blowing efficiency.

Description

Coaxial contrarotating fan

Technical Field

The utility model relates to an oscillating fan technical field, in particular to are particularly suitable for the coaxial contra-rotating fan as domestic oscillating fan.

Background

At present, the fan that needs to sway conversion air-out direction work on a large scale is mostly single flabellum yaw formula fan, and its single flabellum is at the unidirectional rotation during operation, and the angular momentum that has easily makes the fan produce vibration and noise, and the amplitude of oscillation of its single flabellum of organizing is greater than 180 degrees usually, leads to single flabellum to sweep the wind frequency when amplitude of oscillation is big back and forth low.

In order to solve the above problems, in the prior art, a fan that uses a gear mechanism to transmit power to realize the opposite and same-speed rotation (i.e. coaxial counter-rotation or reverse rotation) of a pair of fan blade sets appears, and the equal and opposite angular momentum generated by the opposite and constant-speed reverse rotation of two sets of fan blades can be used, so that the angular momentum generated by the rotation of the pair of fan blade sets can be mutually offset, and the vibration and noise of the fan device can be reduced.

However, the gear transmission mechanism of such a fan is complicated, which results in high precision and high cost of the components of such a fan device that realizes constant-speed and reverse-rotation of a pair of fan blade sets by using the gear transmission mechanism, and therefore, the fan device is generally used in the high-precision technical field of aeroengines and the like, but is not suitable for the field of household electric fans requiring production cost control.

Therefore, how to provide a transmission device with simple structure and low cost to realize the constant-speed reverse rotation of a pair of fan blade sets is a technical problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the lack of a simple structure, the lower transmission of cost among the prior art and realize the reverse technical problem of changeing of a pair of fan blade group constant speed, provide one kind and be particularly suitable for the coaxial counter-rotating fan as domestic yaw formula fan.

For solving the above problem, the utility model discloses a technical scheme be:

the utility model provides a coaxial counter-rotating fan, include: the axial magnetic flux disc type counter-rotating motor comprises a disc stator and a pair of disc rotors which are coaxially arranged on a motor shaft, wherein the pair of disc rotors are respectively positioned on two sides of the disc stator, and the number of poles of permanent magnets of the pair of disc rotors is the same; two groups of fan blades are respectively and correspondingly arranged on the pair of disc rotors, and the two groups of fan blades are respectively and correspondingly driven by the pair of disc rotors to reversely rotate around the motor shaft at a constant speed.

Preferably, the disc stator includes: stator core and the stator winding who installs on stator core.

Preferably, the stator core is a yokeless core.

Preferably, the number of poles of the permanent magnets of the disc rotor is 16 and the number of slots of the stator winding is 18.

Further, the coaxial counter-rotating fan further includes: and the head swinging device is used for driving the axial magnetic flux disc type counter-rotating motor to swing to rotate so as to change the air outlet directions of the two groups of fan blades simultaneously.

Further, the coaxial counter-rotating fan further comprises: the support, the yaw device is located on the support.

Preferably, the head swing device comprises: and the rotary driving unit is arranged on the bracket and is used for driving a rotating shaft vertical to the horizontal plane to rotate horizontally.

Preferably, the disk stator is fixedly mounted on the top end of the rotating shaft.

Further, the coaxial counter-rotating fan further includes: the axial flux disc type counter-rotating motor comprises a support plate arranged on a rotating shaft, and a pair of bearing seats arranged on the support plate, wherein the radial center of the axial flux disc type counter-rotating motor is arranged on the pair of bearing seats.

Further, the coaxial counter-rotating fan further includes: and the protective net cover is arranged on the supporting plate and wraps the axial magnetic flux disc type counter-rotating motor and the two sets of fan blades.

Preferably, the bracket comprises: the base, locate the support column on base top, the rotary driving unit is installed in the support column top.

Further, the coaxial counter-rotating fan further includes: and the controller is arranged on the bracket and used for controlling the axial flux disc type counter-rotating motor.

Compared with the prior art, the utility model provides a coaxial contra-rotating fan utilizes axial flux disc formula to counter-rotating motor drive to counter-rotate double-vane fan structure because two fan blade group structures, rotational speed are the same and turn to opposite, so two fan blade groups can balance each other and eliminate angular momentum, vibration and noise when reducing the fan operation. Meanwhile, the fan motor is short in axial length, small in size, high in power density, convenient to detach and maintain, capable of achieving a larger wind sweeping working range in a bidirectional wind blowing and double-fan small-amplitude rotating mode, and high in blowing efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic front view of an embodiment of a coaxial counter-rotating fan according to the present invention;

fig. 2 is a schematic side view of an embodiment of a coaxial counter-rotating fan according to the present invention;

fig. 3 is a cross-sectional view of a disc stator of an embodiment of a coaxial counter-rotating fan provided by the present invention;

fig. 4 is a schematic view of a disc rotor of an embodiment of a coaxial counter-rotating fan provided by the present invention.

Wherein, in the drawings, the reference numerals are mainly as follows:

1. a motor shaft; 2. a disk stator; 21. a stator winding; 22. a stator core; 3. a disc rotor; 31. a permanent magnet; 4. a fan blade; 5. a rotating shaft; 6. a support plate; 7. a protective mesh enclosure; 8. a base; 81. a support pillar; 9. and a controller.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying fig. 1-4 and the embodiments.

Referring to fig. 1-4, the present invention provides a coaxial counter-rotating fan, comprising: the axial flux disc type counter-rotating motor comprises a disc stator 2 and a pair of disc rotors 3, wherein the disc stator 2 is installed on a motor shaft 1, the disc rotor 2 is fixedly installed on the motor shaft 1, the disc rotors 3 are respectively located on two sides of the disc stator 2 and can rotate around the motor shaft 1, and the number of poles of permanent magnets 31 on the opposite inner sides of the disc rotors 3 is the same; the coaxial counter-rotating fan further comprises: two sets of fan blades 4 respectively correspondingly installed on the pair of disc rotors 3, and the two sets of fan blades 4 are respectively and correspondingly driven by the pair of disc rotors 3 to reversely rotate around the motor shaft 1 at a constant speed.

The radial flux motor that traditional fan adopted, pivot 5 rotate the transmission through the rotor, and flabellum 4 is connected on pivot 5, and fan noise and vibrations are easily caused to the angular momentum that unilateral flabellum 4's unidirectional rotation produced. In the prior art, a fan which utilizes a gear mechanism to transmit to realize the reverse rotation at the same speed (namely, the coaxial contra-rotation or the reverse rotation) of a pair of fan blade 4 groups appears, and the angular momentum generated by the rotation of the pair of fan blade 4 groups can be mutually offset by utilizing the equal and reverse angular momentum generated by the relative constant-speed reverse rotation of the two sets of fan blades 4, so that the vibration and the noise of the fan device are reduced. However, the gear transmission mechanism of the fan is complex, so that the precision requirement and the cost of the parts of the fan device which realizes the constant speed and reverse rotation of the pair of fan blades 4 by utilizing the transmission of the gear transmission mechanism are high, and the fan device is generally used in the high-precision technical field of aeroengines and the like and is not suitable for the field of household electric fans needing to control the production cost.

The utility model discloses a disk-type birotor contra-rotating permanent magnet motor (axial magnetic flux disk type) drive has advantages such as small, power density is big, simple structure, axial length is short, easy dismouting is maintained, material cost is lower, the noise is less. Specifically, two disc rotors 3 with the same pole number of the permanent magnets 31 on the opposite inner side surfaces are rotatably mounted on the same motor shaft 1, the disc stator 2 is arranged between the two disc rotors 3 and is coaxial with the two disc rotors 3 and fixedly mounted on the motor shaft 1, when three-phase alternating current is fed into a stator winding 21 of the disc stator 2, rotating magnetic fields with the same size and opposite directions are generated on the two sides of the disc stator 2, and under the action of the two rotating magnetic fields with the same size and opposite directions, the two disc rotors 3 on the two sides of the disc stator 2 can rotate along with the magnetic fields under the action of the magnetic fields, and because the two magnetic fields have the same size and opposite directions and the pole numbers of the permanent magnets 31 of the two disc rotors 3 are equal, the rotating speeds of the two rotors are the same and opposite directions, the fan blades 4 driven by the two rotors also have the same rotating speed and opposite directions, so that the two rotors respectively drive the two sets of fan blades 4 to rotate in opposite directions (i.e., rotate in opposite directions at the same speed), angular momentum generated by the two sets of fan blades 4 can be mutually offset, and vibration and noise when the fan is allowed can be effectively reduced.

Referring to fig. 3, in the present embodiment, the disc stator 2 includes: a stator core 22 and a stator winding 21 mounted on the stator core 22. In a preferred embodiment, the stator core 22 is a yolkless core. The disk stator 2 adopts a yoke-free iron core, and the structure of the stator iron core 22 lightens the mass of the motor, reduces magnetic hysteresis and eddy current loss, and improves the performance and efficiency of the motor. As a more preferable embodiment, the disc rotor 3 employs a plurality of surface-mount permanent magnets 31 uniformly arranged on one side of the disc rotor 3 facing the stator along the radial direction of the disc rotor 3, the surface-mount permanent magnets 31 are employed on the disc rotor 3, and the surface-mount permanent magnets 31 have the advantages of simpler structure, improved motor efficiency, improved torque-current ratio and power factor, and the like.

Referring to fig. 4, in an embodiment, the number of poles of the permanent magnets 31 of the disc rotor 3 is 16 (i.e., the number of the permanent magnets 31 is 16), the number of slots of the stator winding 21 of the disc stator 2 is 18 (i.e., the number of the stator winding 21 is 18, and the number of slots of each corresponding stator winding 21 of the three-phase alternating current is 6), that is, the disk stator 2 and the disc rotor 3 are matched by pole slots of fractional-slot concentrated windings, the fractional-slot concentrated windings can reduce copper loss, save material cost, and simultaneously improve the efficiency of the motor, enhance the flux weakening capability, improve the slot utilization rate, and do not need to consider the characteristics such as reducing cogging torque.

Referring to fig. 1 and 2, in an embodiment, the coaxial counter-rotating fan of the present invention further includes a swing head device for driving the axial flux plate type counter-rotating motor to swing head to change the air-out direction of the two sets of fan blades 4. In this embodiment, the coaxial counter-rotating fan further includes: the head swinging device is arranged on the bracket; the head swinging device comprises: a rotation driving unit (not shown) installed on the bracket for driving a rotation shaft 5 perpendicular to a horizontal plane to rotate horizontally; in a preferred embodiment, the rotary drive unit uses a drive motor. In one embodiment, the disc stator 2 is fixedly mounted on the top end of the rotating shaft 5; the coaxial counter-rotating fan further comprises: a support plate 6 mounted on the rotating shaft 5, and a pair of bearing seats (not shown) mounted on the support plate 6, and the radial center of the axial flux disk type counter-rotating motor is mounted on the pair of bearing seats. In another embodiment, the coaxial counter-rotating fan further comprises: and the protective net cover 7 is arranged on the support plate 6 and wraps the axial magnetic flux disc type counter-rotating motor and the two groups of fan blades 4. As a preferred embodiment, the stent comprises: a base 8, the base 8 preferably being a horizontal seat plate; the supporting column 81 is arranged at the top end of the base, and the rotary driving unit is arranged at the top end of the supporting column 81; in a preferred embodiment, the supporting column 81 is provided with a lifting device in the form of a cylinder, a lead screw nut, a rack and pinion, or a synchronous pulley, and the like, for adjusting the air outlet height of the coaxial counter-rotating fan.

The utility model provides a coaxial counter-rotating fan sweeps wind working range bigger than traditional one-way yaw formula fan under yaw device's effect, and owing to adopted coaxial counter-rotating's two-way air-out structure, the yaw fan of relative traditional one-way air-out generally need reach more than 180 degrees, the utility model provides a coaxial counter-rotating fan's two sets of flabellum 4 the swing range only need reach 90 degrees can, and unit area receives wind time interval and shortens half to avoid leading to sweeping wind frequency because of fan swing range is too big and cross low influence user experience.

Referring to fig. 1, in one embodiment, the coaxial counter-rotating fan further includes: and the controller is used for controlling the axial flux disc type counter-rotating motor. As a preferred embodiment, the controller is arranged on the bracket, a control panel of the controller is provided with a speed-regulating gear stage, and the axial flux disc type counter-rotating motor is regulated by adopting a voltage-regulating speed-regulating mode, so that the wind speed of the coaxial counter-rotating fan is regulated; a rotary switch is arranged on a control panel of the controller, and can control the rotating shaft 5 to swing and rotate in a reciprocating manner at 90 degrees, so that the coaxial counter-rotating fan can swing and rotate in two directions to blow air (namely, swing and sweep air in two directions).

The utility model provides a coaxial contra-rotating fan is particularly suitable for as domestic yaw fan.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A coaxial counter-rotating fan, comprising: the axial flux disc type counter-rotating motor comprises a disc stator and a pair of disc rotors, wherein the disc stator and the pair of disc rotors are coaxially arranged on a motor shaft, the pair of disc rotors are respectively positioned on two sides of the disc stator, and the number of poles of permanent magnets of the pair of disc rotors is the same; two groups of fan blades are respectively and correspondingly arranged on the pair of disc rotors, and the two groups of fan blades are respectively and correspondingly driven by the pair of disc rotors to reversely rotate around the motor shaft at a constant speed.

2. The coaxial counter-rotating fan according to claim 1, wherein the disc stator includes: the stator comprises a stator core and a stator winding arranged on the stator core.

3. The coaxial counter-rotating fan according to claim 2, wherein the stator core is a yokeless core.

4. The coaxial counter-rotating fan according to claim 2, wherein the number of poles of the permanent magnets of the disc rotor is 16 and the number of slots of the stator winding is 18.

5. A coaxial counter-rotating fan according to any one of claims 1-4, further comprising:

and the head swinging device is used for driving the axial magnetic flux disc type counter-rotating motor to swing to rotate so as to change the air outlet directions of the two groups of fan blades simultaneously.

6. The coaxial counter-rotating fan according to claim 5, further comprising:

the swing head device is arranged on the support.

7. The coaxial counter-rotating fan according to claim 6, wherein the head swing device comprises: and the rotary driving unit is arranged on the bracket and is used for driving a rotating shaft vertical to the horizontal plane to rotate horizontally.

8. The coaxial counter-rotating fan according to claim 7, wherein the disc stator is fixedly installed at a top end of the rotating shaft.

9. The coaxial counter-rotating fan according to claim 7, further comprising:

the axial flux disc type counter-rotating motor comprises a support plate arranged on the rotating shaft, and a pair of bearing seats arranged on the support plate, wherein the radial center of the axial flux disc type counter-rotating motor is arranged on the pair of bearing seats.

10. The coaxial counter-rotating fan according to claim 9, further comprising:

and the protection net cover is arranged on the supporting plate and wraps the axial magnetic flux disc type counter-rotating motor and the two groups of fan blades.

11. The coaxial counter-rotating fan according to claim 7, wherein the bracket includes:

the base is arranged on the supporting column at the top end of the base, and the rotary driving unit is arranged at the top end of the supporting column.

12. The coaxial counter-rotating fan according to claim 6, further comprising:

and the controller is arranged on the bracket and is used for controlling the axial flux disc type counter-rotating motor.