CN221947985U - High-speed motor and dryer - Google Patents

Abstract

The utility model provides a high-speed motor and an air duct, which relate to the technical field of motors and comprise: a housing, a stator assembly, a rotor assembly, and an impeller. The shell comprises an outer shell, an inner shell coaxial with the outer shell and provided with an inner cavity, and an air deflector connecting the outer shell and the inner shell; a first air channel is formed among the outer shell, the inner shell and the air deflector, and a stator mounting hole and a shaft hole are sequentially arranged in the inner cavity of the inner shell; the inner shell is provided with an air guide hole communicated with the first air duct and the stator mounting hole; the stator assembly is assembled in the stator mounting hole and is provided with a middle hole; the rotor component is arranged in the middle hole in a penetrating way one end of the sleeve penetrates out of the shaft hole; the impeller is fixedly assembled at one end of the rotor assembly penetrating out of the shaft hole; the first bearing is arranged in the shaft hole, the second bearing is arranged in the middle hole, and the rotor assembly is rotatably arranged in the middle hole through the first bearing and the second bearing. Therefore, the technical scheme has the advantages of silence and stability.

Description

High-speed motor and dryer

Technical Field

The utility model relates to the technical field of motors, in particular to a high-speed motor and an air duct.

Background

The motor is a device for converting electric energy into mechanical energy by using an electromagnetic induction principle, and is widely applied to various electrical equipment required for industrial production and life. Because the high-speed motor has the advantages of high efficiency, small size and the like, the motor is particularly suitable for household appliances and personal care industries.

The existing high-speed motor generally comprises a shell, a stator, a rotor and an impeller, wherein the shell comprises an outer shell and an inner shell, the stator is arranged in the inner shell, the rotor is arranged at the middle position of the stator, and the impeller is fixedly connected with a rotating shaft of the rotor. Since a high-speed motor generally refers to a motor having a rotational speed exceeding 100000r/min, the temperature in the inner casing increases sharply with the operation of the motor, and as such, the motor may burn out even for a long time, resulting in a short service life of the high-speed motor. Therefore, the Chinese patent publication No. CN220302370U discloses a wind guide hole which is arranged on the inner shell and is communicated with a wind channel formed by the inner shell and the outer shell and a stator mounting hole, so that when the impeller rotates, wind can enter the stator mounting hole through the wind guide hole to take away heat generated by the stator and the rotor, and further radiate heat of the motor. However, the technical scheme has the defects that for example, as the rotor is rotationally arranged in the shaft hole of the inner shell through two bearings, a gap communicated with the outside exists at the matching position of the middle hole of the stator and the rotor, when wind enters the inner cavity of the inner shell from the wind guide hole, a part of air flow can pass through the gap, and the high-speed rotation of the rotor can cause the high-speed motor to generate whistle and noise; in addition, the rapid passage of the air flow can also cause interference to the rotation of the rotor, thereby generating frame movement.

Therefore, a silent and stable high-speed motor and a wind tunnel are to be designed.

Disclosure of utility model

The utility model aims to overcome the defects and shortcomings of the prior art, and provides a high-speed motor and a wind barrel, which at least solve one of the technical problems, and have the advantages of silence and stability.

To achieve the above object, an aspect of the present utility model provides a high-speed motor comprising:

The air guide plate comprises a shell, an inner shell and an air guide plate, wherein the shell comprises an outer shell, an inner shell which is coaxial with the outer shell and is provided with an inner cavity, and the air guide plate is connected with the outer shell and the inner shell; a first air channel is formed among the outer shell, the inner shell and the air deflector, and a stator mounting hole and a shaft hole are sequentially arranged in the inner cavity of the inner shell; the inner shell is provided with an air guide hole communicated with the first air duct and the stator mounting hole;

A stator assembly assembled in the stator mounting hole and having a middle hole;

the rotor assembly is penetrated through the middle hole, and one end of the rotor assembly penetrates out of the shaft hole;

the impeller is fixedly assembled at one end of the rotor assembly penetrating out of the shaft hole;

Wherein, a first bearing is arranged in the shaft hole, a second bearing is arranged in the middle hole, the rotor assembly is rotatably arranged in the middle hole through the first bearing and the second bearing.

Optionally, the first bearing is disposed at an end of the shaft hole near the impeller, and the second bearing is disposed at an end of the middle hole far from the impeller.

Optionally, the inner chamber of inner shell still is equipped with dodges the ring hole, dodge the ring hole and be located between stator mounting hole and the shaft hole.

Optionally, a sealing cover for preventing air flow from passing through is arranged between the inner ring and the outer ring of the second bearing.

Optionally, the stator mounting hole is provided with a first step surface in the inner cavity of the inner shell, and a plurality of axially extending assembly grooves are uniformly and alternately arranged on the inner peripheral wall of the stator mounting hole; the stator assembly comprises a stator rubber coating with winding teeth, a second step surface matched with the first step surface is formed at one end, close to the impeller, of the stator rubber coating, and a raised line matched with the assembly groove is arranged on one surface, away from the middle hole, of the winding teeth.

Optionally, the cross-sectional shape of the assembly groove is in a minor arc arcuate shape.

Optionally, the number of the assembly grooves is six, and the number of the winding teeth is six.

Optionally, one end of the inner shell, which is close to the impeller, is provided with a third step surface and an annular boss protruding out of the third step surface; the air guide holes are uniformly arranged on the third step surface in a spacing ring mode.

Optionally, a plurality of aviation baffle evenly set up in between the shell body with the inner shell body, the aviation baffle is crooked form and has the radian, and its one end is connected the inner wall of shell body, the other end is connected the outer wall of inner shell body.

In another aspect, the present utility model provides a wind tunnel comprising: the dryer body, the dryer body has air inlet portion, air-out portion, inner space, and sets up the high-speed motor of any one of the preceding claims in the inner space.

Compared with the prior art, the application has the advantages that:

Because the first bearing is arranged in the shaft hole, the second bearing is arranged in the middle hole, and the rotor assembly is rotatably arranged in the middle hole through the first bearing and the second bearing. Therefore, the gap between the middle hole and the rotor matching position can be sealed by the second bearing, and when the air flow enters the inner cavity of the inner shell from the air guide hole, the air flow can only pass through the space between the winding teeth of the stator and can not pass through the middle hole and the rotor matching position, so that howling can not be generated, and the silencing effect is good; in addition, because no air flow which interferes with the rotation of the rotor exists, the high-speed motor cannot generate frame movement, so that the motor is more stable.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a top view of an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view taken along line A-A in FIG. 2;

FIG. 4 is an exploded view of an embodiment of the present utility model;

FIG. 5 is an exploded view of a portion of the structure of an embodiment of the present utility model;

FIG. 6 is an exploded view of another view of a portion of the structure of an embodiment of the present utility model;

Fig. 7 is a schematic structural diagram of a second bearing according to an embodiment of the present utility model.

Description of the reference numerals

100-High-speed motor;

1-a housing; a-an air inlet end; b-an air outlet end; 11-an outer shell; 12-an inner housing; d-stator mounting holes; e-a first step surface; f-an assembly groove; g-avoiding the annular hole; h-a third step surface; 13-an annular boss; i-an air guide hole; j-shaft hole; 14-air deflectors;

A 2-stator assembly; m-mesopores; n-bearing mounting slots; 21-stator encapsulation; 211-winding teeth; 212-convex strips; o-second step surface;

3-a rotor assembly; 31-a rotating shaft; 32-a magnetic ring;

4-impeller; 41-hub; 42-leaf;

5-a first bearing;

6-a second bearing; 61-sealing the cover;

7-a third bearing;

8-spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "back", "side", "circumferential", and the like of the present utility model indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Moreover, the terms first, second, etc. are only used to distinguish a plurality of components or structures having the same or similar structure, and do not denote any particular limitation on the arrangement order or connection relationship.

Referring to fig. 1 to 7, an embodiment of the present utility model provides a high-speed motor 100, including: a housing 1, a stator assembly 2, a rotor assembly 3 and an impeller 4. The housing 1 includes an outer housing 11, an inner housing 12, and an air deflector 14. The inner housing 12 has an inner cavity and is coaxially disposed with the outer housing 11, and the outer housing 11 and the inner housing 12 are connected by an air deflector 14. The shell 1 is provided with an air inlet end a and an air outlet end b; a first air channel for air flow is formed among the outer shell 11, the inner shell 12 and the air deflector 14. The inner cavity of the inner shell 12 is sequentially provided with a stator mounting hole d and a shaft hole j from an air outlet end b to an air inlet end a; the inner shell 12 is provided with an air guide hole i communicated with the first air duct and the stator mounting hole d; in this way, air flow may enter the stator mounting hole d from the first air duct through the air guide hole i to cool the stator assembly 2 assembled in the stator mounting hole d. Optionally, an avoidance ring hole g for preventing interference of each component and facilitating assembly of the stator assembly 2 is arranged between the stator mounting hole d and the shaft hole j, and the avoidance ring hole g can also facilitate spatial diffusion of air flow entering from the air guide hole i so as to facilitate cooling of the stator assembly 2 in all directions. Specifically, in this embodiment, the outer casing 11 is cylindrical, and the outer casing 11, the inner casing 12, and the air deflector 14 may be made by injection molding of one of aluminum alloy sections, aluminum sections, nylon PA66, and plastic; of course, in other embodiments, the outer casing 11, the inner casing 12 and the air deflector 14 may be separate structures and fixed by screws.

The stator assembly 2 is fitted in the stator mounting hole d, and the stator assembly 2 has a middle hole m; the rotor assembly 3 is disposed through the middle hole m, and one end of the rotor assembly is disposed through the shaft hole j. Specifically, the stator assembly 2 includes a stator casing 21 having winding teeth 211, a stator winding (not shown) wound in the winding teeth 211, and a PCB circuit board (not shown) electrically connected to the stator winding, the PCB circuit board being connected to a power source (not shown) to energize the stator winding. In the present embodiment, the air flow entering the stator mounting hole d of the inner housing 12 from the air guide hole i can flow out through the gaps between the stator windings of the stator cover 21, and thus heat generated when the high speed motor 100 rotates can be taken away. The rotor assembly 3 comprises a rotating shaft 31 and a magnetic ring 32, wherein the magnetic ring 32 is annularly arranged and fixed at the lower end of the rotating shaft 31 and is arranged in a middle hole m of the stator rubber coating 21 together with the rotating shaft 31; the other end of the rotation shaft 31 is penetrated out from the shaft hole j.

The impeller 4 is fixedly assembled at one end of the rotor assembly 3 penetrating through the shaft hole j. The impeller 4 may be fixed to the rotating shaft 31 by means of glue, interference fit or bolts, etc. to receive the torque of the rotating shaft 31. Specifically, the impeller 4 includes a hub 41 and blades 42, the impeller 4 is connected with one end of the rotor assembly 3 penetrating out of the shaft hole j through the hub 41, and the blades 42 are uniformly arranged on the peripheral wall of the hub 41 at intervals; in the embodiment of the application, the PCB is connected with a power supply to electrify the stator winding, and the rotor assembly 3 is driven to rotate by electromagnetic effect to drive the impeller 4 to rotate so as to drive air flow to enter from the air inlet end a, and the air flow is blown out from the air outlet end b through the first air duct.

In this embodiment, the first bearing 5 is disposed in the shaft hole j, the second bearing 6 is disposed in the middle hole m, and the rotor assembly 3 is rotatably disposed in the middle hole m of the stator assembly 2 through the first bearing 5 and the second bearing 6. The outer ring of the first bearing 5 is fixedly assembled with the inner wall of the shaft hole j, and specifically, the outer ring of the first bearing 5 and the rotating shaft 31 can be fixedly assembled through glue, interference fit and other modes. The middle hole m has a bearing mounting slot n in which the outer ring of the second bearing 6 is fixedly disposed, and the inner ring of the second bearing 6 is assembled with the rotating shaft 31. This causes the rotor assembly 3 to be rotatably disposed in the middle bore m.

Since the first bearing 5 is disposed in the shaft hole j and the second bearing 6 is disposed in the middle hole m, the rotor assembly 3 is rotatably disposed in the middle hole m of the stator assembly 2 through the first bearing 5 and the second bearing 6. So, the gap between the middle hole m and the rotor matching position can be sealed by the second bearing 6, when the air flow enters the inner cavity of the inner shell 12 from the air guide hole i, the air flow can only pass through the space between the winding teeth 211 of the stator, but can not pass through the middle hole m and the rotor matching position, thus howling can not be generated, and the silencing effect is good; in addition, since there is no air flow interfering with the rotation of the rotor, the high-speed motor 100 is not framed and is thus more stable.

In order to improve the rotational stability of the rotor assembly 3, alternatively, referring to fig. 3 to 6, in the present embodiment, the first bearing 5 is disposed at an end of the shaft hole j near the impeller 4, and the second bearing 6 is disposed at an end of the middle hole m far from the impeller 4. Further, a third bearing 7 is provided at an end of the shaft hole j remote from the impeller 4, and the rotor assembly 3 is rotatably connected to the third bearing 7. An elastic member is provided between the first bearing 5 and the third bearing 7, and one end of the elastic member abuts against the first bearing 5 and the other end of the elastic member abuts against the third bearing 7. Alternatively, the elastic member is a spring 8.

In order to further enhance the air tightness, preferably, referring to fig. 7, in the present embodiment, a seal cover 61 for preventing the air flow from passing through is provided between the inner ring and the outer ring of the second bearing 6. In this way, the air flow does not pass through the gap between the inner and outer rings of the second bearing 6. Alternatively, the second bearing 6 and the first bearing 5 are both deep groove ball bearings.

To achieve rapid assembly of the stator and the inner housing 12, and to achieve stability of assembly; alternatively, referring to fig. 5 and 6, in the present embodiment, a first step surface e is formed in the inner cavity of the inner housing 12 in the stator mounting hole d, that is, the first step surface e is formed between the stator mounting hole d and the avoidance ring hole g; in this embodiment, since the stator mounting hole d is also a circular hole and is coaxially disposed, and the aperture of the stator mounting hole d is larger than the aperture of the avoidance ring hole g, the first step surface e is formed in this way; the inner peripheral wall of the stator mounting hole d is uniformly provided with a plurality of axially extending assembly grooves f at intervals; the stator assembly 2 comprises a stator encapsulation 21 with winding teeth 211, a second step surface o matched with the first step surface e is formed at one end of the stator encapsulation 21 close to the impeller 4, and a raised line 212 matched with the assembly groove f is arranged at one surface of the winding teeth 211 far away from the middle hole m. Alternatively, the stator encapsulation 21 is realized by glue and a fixed assembly with the inner housing 12. The fitting of the first step surface e and the second step surface o can make the installation and positioning of the stator more accurate, and the fitting of the fitting groove f and the convex strip 212 can make the assembled stator not generate rotational displacement. In this embodiment, the cross-sectional shape of the fitting groove f is a minor arc arcuate shape, and correspondingly, the cross-sectional shape of the ridge 212 is a minor arc arcuate shape. Of course, in other embodiments, the cross-sectional shape of the fitting groove f may be square or trapezoidal, and accordingly, the protrusion 212 may have a shape corresponding to the fitting groove f, which is not particularly limited herein. In the present embodiment, the number of the fitting grooves f is six, and the number of the winding teeth 211 is six.

Optionally, referring to fig. 5, in this embodiment, an end of the inner casing 12 near the impeller 4 has a third step surface h and an annular boss 13 protruding from the third step surface h; the air guide holes i are uniformly arranged on the third step surface h in a spacing ring mode. Specifically, in the present embodiment, the air guide hole i is a waist-shaped hole, specifically, six waist-shaped holes are arranged around the annular boss 13 in the third step surface h, and of course, the air guide hole i may be a circular hole or other shapes, and is not limited in particular.

Preferably, referring to fig. 5, in the present embodiment, 7 air deflectors 14 are uniformly arranged between the outer casing 11 and the inner casing 12, the air deflectors 14 are curved and have an arc shape, one end of each air deflector is connected to the inner wall of the outer casing 11, and the other end of each air deflector is connected to the outer wall of the inner casing 12. The curved air deflector 14 with radian can enable the air to form spiral rotation air outlet along the axial direction in the first air duct, which is beneficial to gathering the air, so as to achieve good air guiding and wind speed improving effects. Of course, in other embodiments, the number of air deflectors 14 may be 5, 6, 8, 9, etc., which is not limited herein.

In addition, an embodiment of the present utility model also provides a wind tunnel (not shown in the drawings), which includes a wind tunnel body having an air inlet portion, an air outlet portion, an inner space, and the high-speed motor 100 as described above disposed in the inner space. Since the wind tunnel has all the structures and connection relations of the high-speed motor 100, it has all the advantages of the high-speed motor 100, which will not be described herein.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions.

Claims (10)

1. A high speed motor, comprising:

A housing (1) comprising an outer housing (11), an inner housing (12) coaxial with the outer housing (11) and having an inner cavity, and an air deflector (14) connecting the outer housing (11) and the inner housing (12); a first air duct is formed among the outer shell (11), the inner shell (12) and the air deflector (14), and a stator mounting hole (d) and a shaft hole (j) are sequentially arranged in the inner cavity of the inner shell (12); the inner shell (12) is provided with an air guide hole (i) communicated with the first air duct and the stator mounting hole (d);

A stator assembly (2) fitted in the stator mounting hole (d) having a middle hole (m);

A rotor assembly (3) which is arranged in the middle hole (m) in a penetrating way and one end of which is penetrated out of the shaft hole (j);

The impeller (4) is fixedly assembled at one end of the rotor assembly (3) penetrating out of the shaft hole (j);

Wherein a first bearing (5) is arranged in the shaft hole (j), a second bearing (6) is arranged in the middle hole (m), the rotor assembly (3) is rotatably arranged in the middle hole (m) through the first bearing (5) and the second bearing (6).

2. A high speed motor according to claim 1, wherein the first bearing (5) is arranged at an end of the shaft bore (j) close to the impeller (4), and the second bearing (6) is arranged at an end of the intermediate bore (m) remote from the impeller (4).

3. The high-speed motor according to claim 1, wherein the inner cavity of the inner housing (12) is further provided with an avoidance ring hole (g), and the avoidance ring hole (g) is located between the stator mounting hole (d) and the shaft hole (j).

4. A high-speed motor according to claim 1, characterized in that a sealing cover (61) preventing the passage of air flow is arranged between the inner and outer rings of the second bearing (6).

5. A high-speed motor according to claim 1, wherein the stator mounting hole (d) is formed with a first step surface (e) in the inner cavity of the inner housing (12), and a plurality of axially extending assembly grooves (f) are uniformly and alternately formed in the inner peripheral wall of the stator mounting hole (d); the stator assembly (2) comprises a stator rubber coating (21) with winding teeth (211), a second step surface (o) matched with the first step surface (e) is formed at one end, close to the impeller (4), of the stator rubber coating (21), and a raised line (212) matched with the assembly groove (f) is formed on one surface, far away from the middle hole (m), of the winding teeth (211).

6. A high-speed motor according to claim 5, wherein the cross-sectional shape of the fitting groove (f) is in the form of a minor arc bow.

7. A high-speed motor according to claim 5, wherein the number of the fitting grooves (f) is six and the number of the winding teeth (211) is six.

8. A high-speed motor according to claim 1, characterized in that one end of the inner housing (12) close to the impeller (4) is provided with a third step surface (h), and an annular boss (13) protruding from the third step surface (h); the air guide holes (i) are uniformly arranged on the third step surface (h) in a spacing ring mode.

9. The high-speed motor according to claim 1, wherein a plurality of air deflectors (14) are uniformly arranged between the outer housing (11) and the inner housing (12), the air deflectors (14) are curved and have an arc shape, one end of each air deflector is connected with the inner wall of the outer housing (11), and the other end of each air deflector is connected with the outer wall of the inner housing (12).

10. A wind tunnel, comprising: a wind tunnel body having an air inlet portion, an air outlet portion, an inner space, and the high-speed motor according to any one of claims 1 to 9 provided in the inner space.