CN221806603U - Centrifugal fan and outer rotor permanent magnet synchronous motor thereof - Google Patents

Abstract

The utility model relates to the field of fans, in particular to a centrifugal fan and an outer rotor permanent magnet synchronous motor thereof. An outer rotor permanent magnet synchronous motor comprises a motor shell and a motor shaft penetrating through the center of the motor shell; the motor shell is internally provided with a rotor component fixedly connected with the motor shell and a stator component fixedly connected with a motor shaft; the method is characterized in that: the motor shell edge is constructed with a plurality of link that are used for connecting wind wheel end dish along its circumference, and the motor shell still has arranged multi-disc strengthening rib piece along its circumference, and the strengthening rib piece is outstanding in the outer wall of motor shell and is constructed as the spoiler. The scheme is characterized in that a plurality of reinforcing rib sheets are further arranged on the surface of the motor shell along the circumferential direction of the motor shell, the strength of the motor shell can be increased by the reinforcing rib sheets on one hand, and on the other hand, in the operation process, the reinforcing rib sheets rotate along with the circumferential direction of the motor shell, so that the air vortex can be effectively reduced, the pneumatic performance of the centrifugal fan is improved, and the wind noise is reduced.

Description

Centrifugal fan and outer rotor permanent magnet synchronous motor thereof

Technical Field

The utility model relates to the field of fans, in particular to a centrifugal fan and an outer rotor permanent magnet synchronous motor thereof.

Background

The traditional centrifugal fan comprises an outer rotor motor, a centrifugal wind wheel, a fan volute and a bracket component, wherein the bracket component is arranged on the fan volute, the outer rotor motor and the centrifugal wind wheel are arranged in the fan volute, and a motor shaft of the outer rotor motor is fixed on the bracket component, namely is relatively fixed with the fan volute. The centrifugal fan driven by the outer rotor is described in Chinese patent publication No. CN201896766U, and comprises an outer rotor motor, a centrifugal wind wheel, a fan volute and a bracket component, wherein the outer rotor motor comprises a rotating shaft, a shell, a front end cover, a rear end cover, a stator component and a rotor component, the front end cover and the rear end cover are arranged at two ends of the shell, bearings are arranged in bearing chambers arranged in the centers of the front end cover and the rear end cover, the stator component is arranged and fixed on the rotating shaft, the rotor component is sleeved outside the stator component, and is nested and arranged in the shell and can rotate together with the shell, the front end cover and the rear end cover, and the rotating shaft extends out of the front end cover and the rear end cover and is embedded into a shaft sleeve of the bracket component.

The forward double air intake centrifugal fan utilizes an impeller rotating at a high speed to accelerate or decelerate gas, change the flow direction and convert kinetic energy into potential energy (pressure). The air is air channels along two sides of the axis, flows through the motor shell, enters the impeller, and then is changed into radial outflow by the impeller. In this process, a gas vortex is generated between the axial step of the casing and the impeller, and the gas vortex increases noise when the fan operates.

Disclosure of Invention

In order to solve the problems, the utility model aims to provide an outer rotor permanent magnet synchronous motor, wherein a plurality of reinforcing rib sheets are further arranged on the surface of a motor shell along the circumferential direction of the motor shell, so that the strength of the motor shell can be increased by the reinforcing rib sheets, and on the other hand, the reinforcing rib sheets rotate along with the circumferential direction of the motor shell in the running process, so that the gas vortex can be effectively reduced, the pneumatic performance of a centrifugal fan is improved, and the wind noise is reduced.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

An outer rotor permanent magnet synchronous motor comprises a motor shell and a motor shaft penetrating through the center of the motor shell; the motor shell is internally provided with a rotor component fixedly connected with the motor shell and a stator component fixedly connected with a motor shaft; the method is characterized in that: the motor shell edge is constructed with a plurality of link that are used for connecting wind wheel end dish along its circumference, and the motor shell still has arranged multi-disc strengthening rib piece along its circumference, and the strengthening rib piece is outstanding in the outer wall of motor shell and is constructed as the spoiler.

The technical scheme is that the outer rotor permanent magnet synchronous motor comprises a motor shell, a motor stator, a motor rotor, a motor stator and a motor shaft, wherein the motor rotor is fixedly connected with the motor stator; when in installation, a motor shaft passes through the center of the motor shell and is fixed with a bracket on the volute; the end disk of the centrifugal wind wheel is fixedly connected with the motor shell. When the motor operates, the rotor assembly, the motor shell and the wind wheel rotate at a high speed, and the motor shaft is fixed relative to the volute.

On the basis, compared with the prior art, the improvement point of the scheme is as follows: the motor casing edge in this scheme is provided with a plurality of link and is used for connecting the wind wheel end dish, and has still arranged multi-disc strengthening rib piece along its circumference on motor casing surface, and strengthening rib piece can increase motor casing's intensity on the one hand, and on the other hand is at the operation in-process, and the strengthening rib piece is rotatory along with motor casing circumference, can effectually reduce gas vortex, improves centrifugal fan's pneumatic performance, reduces wind noise.

In a specific embodiment, an annular step is constructed on the outer wall of the motor housing, and a plurality of reinforcing rib sheets are constructed in the annular step; the two side walls of the reinforcing rib sheet are integrally connected with the two step surfaces of the annular step. The solution here uses a reinforcing rib sheet for reinforcing the strength of the connection between the two side walls of the annular step. In a further scheme, the outer side wall of the reinforcing rib sheet is constructed into an inclined plane or an arc-shaped surface gradually changing along the axial direction of the motor shell, and the reinforcing rib sheet of the gradually changing outer side wall generates air flow disturbance relative to the axial direction and the radial direction of the motor, so that air vortex can be reduced, the aerodynamic performance of the centrifugal fan is improved, and wind noise is reduced.

Preferably, the motor shell comprises a left shell and a right shell which can be in butt joint and combination, flange rings are respectively constructed on the outer edges of the left shell and the right shell, the flange rings of the left shell and the right shell are fixedly connected through a plurality of connecting parts, and a plurality of reinforcing rib sheets are respectively arranged on the left shell and/or the right shell. In the scheme, the motor shell is formed by butt joint of a left shell and a right shell. In a specific embodiment, the left shell and the right shell are constructed to be the same shape, and in the scheme, the left shell and the right shell are both of the same structure, namely, can be manufactured by the same pair of aluminum die-casting molds, so that the cost can be reduced. Further, through holes and threaded holes are arranged at equal angular intervals on the flange rings of the left shell and the right shell; the left shell and the right shell are installed in a staggered mode to enable the threaded holes to correspond to the through holes, the connecting part is a screw-fixing part, and the screw-fixing part penetrates through the through holes to be fixedly connected with the threaded holes.

Preferably, a plurality of grooves for fixing the rotor assembly are formed in the inner side walls of the left shell and/or the right shell, the product belongs to an outer rotor motor structure, and the rotor core and the shell are assembled and then rotate along the main shaft with load. The grooves can inhibit the rotor core from separating from the shell due to radial centrifugal force, and can effectively transmit torque, so that the mechanical strength is firm and reliable. Further, each groove has a reinforcing rib corresponding to the radial direction thereof.

Preferably, a plurality of inner reinforcing ribs are radially arranged at the center of the inner side wall of the left shell and/or the right shell in a divergent mode, and the inner reinforcing ribs and the reinforcing rib sheets are circumferentially staggered. In this case, a plurality of inner reinforcing ribs provided on the inner wall may be used to strengthen the left and/or right shells as a whole.

The second object of the utility model is to provide a centrifugal fan, which comprises a volute, a motor and a wind wheel which are arranged in the inner cavity of the volute, and a bracket fixed at the air inlet of the volute; the method is characterized in that: the motor is an outer rotor permanent magnet synchronous motor as described above; wherein the motor shaft is fixedly connected to the bracket, and the wind wheel is fixedly connected with the motor shell.

In the scheme, the left shell and the right shell are recorded to have the same structure and are installed in a staggered mode, so that the threaded holes correspond to the through holes, and the screw-fixing parts penetrate through the through holes and are fixedly connected with the threaded holes. In a further preferred scheme, a plurality of connecting parts for connecting the left shell and the right shell in the outer rotor permanent magnet synchronous motor are positioned on the same side of the flange ring; the wind wheel is a double wind wheel, and a central hole and a plurality of mounting holes circumferentially arranged along the central hole are formed in a disc body at the center of the double wind wheel; when the wind wheel is fixedly connected with the motor shell, the edge of the central hole of the disc body of the double wind wheel is erected on the other side of the flange ring and fixedly connected with the flange ring through a plurality of connecting parts penetrating through the mounting holes. Thus, one side of the flange ring of the left shell and the flange ring of the right shell are used for installing the screw fixing component to realize the fixedly connection of the left shell and the right shell, and the other side of the flange ring is used for installing the screw fixing component to realize the fixedly connection of the double wind wheel end disc and the shell; the two do not interfere.

Drawings

Fig. 1 is a schematic structural diagram of an outer rotor permanent magnet synchronous motor according to the present invention.

Fig. 2 is an assembly schematic of the left and right housings.

Fig. 3 is an internal schematic view of the left housing.

Fig. 4 is an assembly schematic diagram of an outer rotor permanent magnet synchronous motor and a centrifugal wind wheel.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present 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", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Example 1:

as shown in fig. 1 to 3, the present embodiment relates to an outer rotor permanent magnet synchronous motor, which comprises a motor housing 1 and a motor shaft 2 penetrating through the center of the motor housing 1. The motor shell 1 is internally provided with a rotor component fixedly connected with the motor shell and a stator component fixedly connected with the motor shaft 2. The rotor component in the outer rotor permanent magnet synchronous motor is fixedly connected with the motor shell 1, and the stator component is fixedly connected with the motor shaft 2. And deep groove ball bearings are respectively arranged between the inside of the left shell and the right shell and the motor shaft and used for supporting the rotating part, reducing the friction coefficient in the moving process and ensuring the rotation precision of the rotating part. When in installation, the motor shaft 2 passes through the center of the motor housing 1 and is fixed with a bracket on the volute. The end disk of the centrifugal wind wheel is fixedly connected with the motor shell 1. When the motor operates, the rotor assembly, the motor housing 1 and the wind wheel rotate at a high speed, and the motor shaft 2 is fixed relative to the volute.

In a further scheme, a plurality of connection ends [ specifically through holes 17 and threaded holes 16 described below ] for connecting the wind wheel end plates are formed on the edge of the motor housing 1 along the circumferential direction, a plurality of reinforcing rib pieces 14 are further arranged on the motor housing 1 along the circumferential direction, and the reinforcing rib pieces 14 protrude from the outer wall of the motor housing 1 to form a spoiler. Compared with the prior art, the improvement point of the scheme is that: the motor casing 1 edge in this scheme is provided with a plurality of link and is used for connecting the wind wheel end dish, and has still arranged multi-disc strengthening rib piece 14 along its circumference at motor casing 1 surface, and strengthening rib piece 14 can increase motor casing 1's intensity on the one hand, and on the other hand is at the operation in-process, and strengthening rib piece 14 is rotatory along with motor casing 1 circumference, can effectually reduce the gas vortex, improves centrifugal fan's pneumatic performance, reduces wind noise.

In a specific embodiment, an annular step 15 is built on the outer wall of the motor housing 1, and a plurality of reinforcing rib pieces 14 are built in the annular step 15. The two side walls of the reinforcing rib piece 14 are integrally connected with the two step surfaces of the annular step 15. The solution here uses the reinforcing rib pieces 14 for reinforcing the strength of the connection between the two side walls of the annular step 15. In a further scheme, the outer side wall of the reinforcing rib piece 14 is constructed into an inclined plane or an arc-shaped surface gradually changing along the axial direction of the motor shell 1, and the reinforcing rib piece 14 of the gradually changing outer side wall generates air flow disturbance in the axial direction and the radial direction relative to the motor shaft 2, so that air vortex can be reduced, the aerodynamic performance of the centrifugal fan is improved, and wind noise is reduced.

As shown in fig. 1 and 2, the motor housing 1 includes a left housing 11 and a right housing 12 that can be butt-jointed, flange rings 13 are respectively constructed on the outer edges of the left housing 11 and the right housing 12, the flange rings 13 of the left housing 11 and the right housing 12 are fixedly connected through a plurality of connecting members 4, and a plurality of reinforcing rib sheets 14 are respectively arranged on the left housing 11 and/or the right housing 12. In this scheme, motor housing 1 adopts left casing 11 and right casing 12 butt joint to constitute. In a specific embodiment, the left housing 11 and the right housing 12 are constructed in the same shape, and in this embodiment, the left housing 11 and the right housing 12 are both made of the same structure, i.e. the same pair of aluminum die-casting molds, so that the cost can be reduced. Further, the flange rings 13 of the left and right cases 11 and 12 are equiangularly spaced with through holes 17 and screw holes 16. The left shell 11 and the right shell 12 are arranged in a staggered way so that the threaded holes 16 correspond to the through holes 17, the connecting part 4 is a screw-fixing part, and the screw-fixing part penetrates through the through holes 17 and is fixedly connected with the threaded holes 16.

As shown in fig. 3, the inner side walls of the left housing 11 and/or the right housing 12 are provided with a plurality of grooves 18 for fixing the rotor assembly, the product belongs to an outer rotor motor structure, and the rotor core and the housing are assembled and then rotate along the main shaft with load. The grooves 18 can inhibit the rotor core from separating from the casing due to radial centrifugal force, and effectively transmit torque, so that the mechanical strength is firm and reliable. Further, each groove 18 has a reinforcing rib 14 radially corresponding thereto. In addition, a plurality of inner reinforcing ribs 19 are radially and divergently arranged at the center of the inner side wall of the left shell 11 and/or the right shell 12, and the plurality of inner reinforcing ribs 19 and the plurality of reinforcing rib sheets 14 are circumferentially staggered. In this case, a plurality of inner reinforcing ribs 19 provided on the inner wall may be used to strengthen the left and/or right cases 11 and 12 as a whole.

Example 2:

As shown in fig. 4, the present embodiment is to provide a centrifugal fan, which includes a volute, a motor and a wind wheel 3 installed in the inner cavity of the volute, and a bracket fixed at the air inlet of the volute. The motor is an outer rotor permanent magnet synchronous motor as described in embodiment 1. Wherein the motor shaft 2 is fixedly connected to the bracket, and the wind wheel 3 is fixedly connected with the motor shell 1.

In embodiment 1, the left case 11 and the right case 12 are mounted in the same structure and in a staggered manner, and the screw hole 16 corresponds to the through hole 17, so that the screw member is fixed to the screw hole 16 through the through hole 17. In this case, it is further preferable that the plurality of connection members 4 for connecting the left housing 11 and the right housing 12 in the outer rotor permanent magnet synchronous motor are located on the same side as the flange ring 13. The wind wheel 3 is a double wind wheel, and a central hole and a plurality of mounting holes 32 circumferentially arranged along the central hole are formed in a disc body at the center of the double wind wheel. When the wind wheel 3 is fixedly connected with the motor shell 1, the edge of the central hole of the disc body 31 of the double wind wheel is erected on the other side of the flange ring 13, and is fixedly connected with the flange ring 13 through a plurality of connecting parts 4 penetrating through the mounting holes. Thus, one side of the flange ring 13 of the left shell 11 and the right shell 12 is used for installing a screw-fixing part to realize the fixedly connection of the left shell 12 and the right shell 12, and the other side is used for installing the screw-fixing part to realize the fixedly connection of the double wind wheel end disc and the shells, so that the two shells do not interfere.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.

Claims (10)

1. An outer rotor permanent magnet synchronous motor comprises a motor shell (1) and a motor shaft (2) penetrating through the center of the motor shell (1); a rotor assembly fixedly connected with the motor shell (1) and a stator assembly fixedly connected with the motor shaft (2) are arranged in the motor shell; the method is characterized in that: the edge of the motor shell (1) is provided with a plurality of connecting ends used for connecting end plates of the wind wheel (3) along the circumferential direction of the motor shell, the motor shell (1) is also provided with a plurality of reinforcing rib sheets (14) along the circumferential direction of the motor shell, and the reinforcing rib sheets (14) protrude out of the outer wall of the motor shell (1) to form a spoiler.

2. An outer rotor permanent magnet synchronous motor according to claim 1, wherein: an annular step (15) is formed on the outer wall of the motor shell (1), and a plurality of reinforcing rib sheets (14) are formed in the annular step (15); the two side walls of the reinforcing rib sheet (14) are integrally connected with the two step surfaces of the annular step (15).

3. An outer rotor permanent magnet synchronous motor according to claim 2, characterized in that: the outer side wall of the reinforcing rib sheet (14) is constructed as an inclined surface or an arc surface gradually changing along the axial direction of the motor shell (1).

4. An outer rotor permanent magnet synchronous motor according to claim 1, wherein: the motor housing (1) comprises a left housing (11) and a right housing (12) which can be in butt joint and combination, flange rings (13) are respectively constructed on the outer edges of the left housing (11) and the right housing (12), the flange rings (13) of the left housing (11) and the right housing (12) are fixedly connected through a plurality of connecting components (4), and a plurality of reinforcing rib sheets (14) are respectively arranged on the left housing (11) and/or the right housing (12).

5. An outer rotor permanent magnet synchronous motor according to claim 4, wherein: the left shell (11) and the right shell (12) are constructed to be of the same shape, and through holes (17) and threaded holes (16) are arranged at equal angular intervals on flange rings (13) of the left shell (11) and the right shell (12); the left shell (11) and the right shell (12) are arranged in a staggered manner, so that the threaded holes (16) correspond to the through holes (17), the connecting part (4) is a screw part, and the screw part penetrates through the through holes (17) and is fixedly connected with the threaded holes (16).

6. An outer rotor permanent magnet synchronous motor according to claim 4, wherein: a plurality of grooves (18) for fixing the rotor assembly are formed in the inner side walls of the left shell (11) and/or the right shell (12), and each groove (18) is provided with a reinforcing rib piece (14) corresponding to the corresponding groove in the radial direction.

7. An outer rotor permanent magnet synchronous motor according to claim 4, wherein: the inner side wall center of the left shell (11) and/or the right shell (12) is radially provided with a plurality of inner reinforcing ribs (19) in a divergent mode, and the inner reinforcing ribs (19) and the reinforcing rib sheets (14) are circumferentially staggered.

8. A centrifugal fan comprises a volute, a motor and a wind wheel (3) which are arranged in the inner cavity of the volute, and a bracket fixed at the air inlet of the volute; the method is characterized in that: the motor is an outer rotor permanent magnet synchronous motor according to any one of claims 1 to 7; wherein the motor shaft (2) is fixedly connected to the bracket, and the wind wheel (3) is fixedly connected with the motor shell (1).

9. A centrifugal fan comprises a volute, a motor and a wind wheel (3) which are arranged in the inner cavity of the volute, and a bracket fixed at the air inlet of the volute; the method is characterized in that: the motor is an outer rotor permanent magnet synchronous motor according to any one of claims 4 to 7; wherein the motor shaft (2) is fixedly connected to the bracket, and the wind wheel (3) is fixedly connected with the motor shell (1).

10. A centrifugal fan according to claim 9, wherein: a plurality of connecting components (4) for connecting the left shell (11) and the right shell (12) in the outer rotor permanent magnet synchronous motor are positioned on the same side of the flange ring (13); the wind wheel (3) is a double wind wheel, and a central hole and a plurality of mounting holes (32) circumferentially arranged along the central hole are formed in a disc body (31) at the center of the double wind wheel; when the wind wheel (3) is fixedly connected with the motor shell (1), the edge of the central hole of the disc body of the double wind wheel is erected on the other side of the flange ring (13), and is fixedly connected with the flange ring (13) through a plurality of connecting parts (4) penetrating through the mounting holes.