CN220692902U

CN220692902U - Outer rotor motor and fan

Info

Publication number: CN220692902U
Application number: CN202322061584.0U
Authority: CN
Inventors: 吕洪财; 王新; 赵龙武
Original assignee: Weihai Creditfan Ventilator Co Ltd
Current assignee: Weihai Creditfan Ventilator Co Ltd
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2024-03-29
Anticipated expiration: 2033-08-02

Abstract

The utility model relates to the technical field of motors for fans, in particular to an outer rotor motor and a fan. The outer rotor motor for the fan comprises an outer rotor, a stator and a framework sealing ring; the outer rotor can rotate relative to the stator; the outer rotor comprises a shell and a rotor shaft, and the shell is provided with a stator core accommodating cavity; the stator comprises a stator seat and a stator core; the stator core is arranged in the stator core accommodating cavity; one end of the rotor shaft is connected with the inner wall of the shell, and the other end of the rotor shaft penetrates through the stator core to be connected with the stator seat; the two ends of the stator seat are contacted with the shell, and a framework sealing ring is arranged between the stator seat and the shell to form a closed structure. The utility model relates to a moistureproof and rainproof outer rotor motor which is suitable for outdoor and outdoor fans, does not need to additionally increase shielding measures, and has great market value for widening the application occasions of the outer rotor motor.

Description

Outer rotor motor and fan

Technical Field

The utility model relates to the technical field of motors for fans, in particular to an outer rotor motor and a fan.

Background

In fan application, the unique compact size of external rotor motor, occupation space advantage is that internal rotor motor can not replace, but ordinary external rotor motor's dampproofing, rain-proof ability is not good, can only be applied to indoor or need additionally apply under the condition of external safeguard measure, has restricted outdoor installation fan and has used external rotor motor's application.

At present, the utility model with the patent number of CN202210776621.3 discloses an outer rotor motor and a fan, wherein the outer rotor motor comprises a bracket, a stator assembly and a rotor assembly, and the bracket comprises a base body and a mounting shaft which is arranged on one side of the base body and extends along a first direction; the stator assembly is arranged on the periphery of the mounting shaft in a surrounding manner and is fixedly connected with the bracket; the rotor assembly is sleeved on the periphery of the stator assembly and is arranged at intervals with the stator assembly, and the rotor assembly is in rotary fit connection with the mounting shaft; the mounting shaft is solid at least with the part that stator subassembly cooperatees.

The special running structure of the outer rotor motor, the rotor rotates outside the stator, most of the outer surface of the whole motor is a rotating part, unlike the inner rotor motor which only stretches out of a rotating shaft to the outside of the motor, the outer shell of the whole motor is a static part, the outer full-sealing of the motor can be conveniently realized, the design of the common outer rotor motor, the sealing between the rotor (rotating part) and the stator (static part) adopts a labyrinth structure, the rotor and the stator are not contacted with each other, and the labyrinth design with canine teeth staggered is adopted to realize the dustproof function, but due to the existence of gaps between the rotating part and the static part, moisture, rainwater or flushing water flow of the outside atmosphere can easily enter the inside of the motor stator, so that the stator winding is damped, the quality problem is caused, and the service life of the motor is reduced. Therefore, the design of the dampproof and rainproof outer rotor motor which is suitable for outdoor and outdoor fan installation and does not need additional shielding measures has great market value for widening the application occasions of the outer rotor motor.

Disclosure of Invention

Aiming at the defects of the prior art, one of the purposes of the utility model is to provide an external rotor motor which is suitable for outdoor fan installation and does not need to additionally add dampproof and rainproof shielding measures.

The technical scheme for solving the technical problems is as follows: the utility model provides an outer rotor motor, which comprises an outer rotor, a stator and a framework sealing ring; the outer rotor can rotate relative to the stator; the outer rotor comprises a shell and a rotor shaft, and the shell is provided with a stator core accommodating cavity; the stator comprises a stator seat and a stator core; the stator core is arranged in the stator core accommodating cavity; one end of the rotor shaft is connected with the inner wall of the shell, and the other end of the rotor shaft penetrates through the stator core to be connected with the stator seat; the two ends of the stator seat are contacted with the shell, and a framework sealing ring is arranged between the stator seat and the shell to form a closed structure.

As a further scheme of the utility model: the shell and the rotor shaft form a mountain-shaped structure, the rotor shaft is arranged on the inner wall of the shell, and the rotor shaft is arranged in the stator core in a penetrating way.

As a further scheme of the utility model: the framework sealing ring is arranged on the outer rotor, the inner circle of the framework sealing ring is tightly matched with the outer rotor, and the sealing lip at the outer edge of the framework sealing ring is contacted with the sealing matching surface of the stator seat.

As a further scheme of the utility model: the stator core is provided with a rotating shaft perforation and a front bearing chamber and a rear bearing chamber, the stator seat is provided with a mounting screw hole, two bearings are mounted at two ends of the rotor shaft, the inner circle of each bearing and the rotor shaft form interference fit, the outer circle of each bearing and the bearing chamber of the stator core form clearance fit, wherein the inner circle of each bearing close to the stator seat is pressed on the rotor shaft by a pressing plate bolt and a pressing plate, and the outer circle of each bearing close to the stator seat is pressed in the corresponding bearing chamber by a pressing plate bolt and a pressing plate.

As a further scheme of the utility model: the bearing outer ring can axially float in the bearing chamber by adopting clearance fit with the bearing chamber far away from the stator seat bearing, and a wave spring is arranged between the stator seat bearing and the bearing chamber and is used for applying axial precompression to the outer ring of the bearing.

As a further scheme of the utility model: the stator seat is provided with a mounting screw hole connected with the foundation.

The utility model also provides a fan, which comprises an outer rotor motor, wherein an integral impeller is fixedly arranged on the shell of the outer rotor.

The utility model has the advantages that:

1. compared with the traditional outer rotor motor labyrinth structure, the utility model has the advantages that the inner circle of the framework sealing ring is tightly matched with the outer rotor, the sealing lip at the outer edge of the framework sealing ring is contacted with the sealing matching surface of the stator seat, and the capacity of completely isolating moisture from corroding the stator winding is realized; no matter the motor rotor is in a static and running state, and no matter the motor rotor is horizontally or vertically installed, compared with a labyrinth structure, the sealing structure can effectively prevent rainwater from entering the motor stator, realize the rainproof function of the motor, ensure that the fan can run in all weather under the application conditions of outdoor and extremely humid environments, effectively prolong the service life of the motor and reduce the occurrence of faults of the motor;

2. the external rotor motor is applied to the fan, no extra rain shielding measures are needed to be added to the fan, the moistureproof and rainproof functions can be realized only by virtue of the unique sealing characteristics, the application conditions of the fan are widened, the structure of the fan is simplified, and the fan has good popularization significance.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an enlarged schematic view of the structure a in fig. 1 according to the present utility model.

In the figure, 1, a stator seat, 2 and a gland bolt. 3. The device comprises a gland, 4, a pressing plate bolt, 5, a pressing plate, 6, a shell, 7, a wave spring, 8, a bearing, 9, a framework sealing ring, 10, a mounting screw hole, 11 a stator core, 12, a rotor shaft, 13 and an impeller.

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.

Example 1

As shown in fig. 1 and 2, an outer rotor motor comprises an outer rotor, a stator and a framework sealing ring 9; the outer rotor can rotate relative to the stator; the outer rotor includes a housing 6 and a rotor shaft 12, the housing 6 having a stator core accommodating chamber; the stator 1 includes a stator base 1 and a stator core 11; the stator core 11 is arranged in the stator core accommodating cavity; one end of the rotor shaft 12 is connected with the inner wall of the shell 6, and the other end passes through the stator core 11 to be connected with the stator seat 1; two ends of the stator seat 1 are contacted with the shell 6, and a framework sealing ring 9 is arranged between the stator seat 1 and the shell 6 to form a closed structure.

In the present embodiment, the housing 6 and the rotor shaft 12 are formed to constitute a mountain-shaped structure, the rotor shaft 12 is provided on the inner wall of the housing 6, and the rotor shaft 12 is penetrated in the stator core 11. The stator core 11 is wound with a stator coil, the rotor shaft 12 is provided with silicon steel sheets and coils, and current can generate a magnetic field on the silicon steel sheets of the stator and the rotor under the action of the coils, so that the rotor is driven to rotate by the magnetic field.

In this embodiment, the skeleton sealing ring 9 is arranged on the outer rotor, the inner circle of the skeleton sealing ring 9 is tightly matched with the outer rotor, so that a sealing effect can be realized, the sealing lip at the outer edge of the skeleton sealing ring 9 contacts with the sealing matching surface of the stator seat 1, a finished sealing matching surface is selected on the stator seat 1, the complete physical isolation between the inner space of the stator and the external atmosphere is realized, the effect that the inner space is completely sealed is realized, and the aims of dust prevention, moisture prevention and rain prevention are realized.

In this embodiment, the stator core 11 has a shaft hole and two bearing chambers, the stator seat is provided with a mounting screw hole 10, two bearings 8 are mounted at two ends of the rotor shaft 12, the inner circle of the bearing 8 and the rotor shaft 12 form interference fit, the outer circle of the bearing 8 and the bearing chamber of the stator core 11 form clearance fit, wherein the pressing plate bolt 4 and the pressing plate 5 for the inner ring of the bearing close to the stator seat 1 are pressed on the rotor shaft 12, so that the bearing can be prevented from loosening from the rotor shaft, and the pressing plate bolt 2 and the pressing plate 3 for the outer ring of the bearing close to the stator seat 1 are pressed in the bearing chamber, so that the problem of creeping and running of the outer ring of the bearing outer ring in the application process can be prevented. The stator and the outer rotor are mounted together through a bearing, and the stator is motionless and the outer rotor rotates outside the stator when in motion; the inner circle of the bearing 8 is always smaller than the size of the rotor shaft 12, so that the rotor shaft 12 cannot freely rotate or slide in the inner circle of the bearing 8, and the inner circle of the bearing 8 and the rotor shaft 12 form interference fit; the size of the outer circle of the bearing 8 is always larger than the size of the bearing chamber of the stator core 11, a gap is generated, so that the bearing chamber of the stator core 11 can freely rotate in the outer circle of the bearing 8, and the outer circle of the bearing 8 and the bearing chamber of the stator core 11 form clearance fit.

In this embodiment, the bearing 8 far away from the stator seat 1 is in clearance fit with the bearing chamber, the outer ring of the bearing 8 can axially float in the bearing chamber, a wave spring 7 is arranged between the bearing 8 of the stator seat and the bearing chamber, and the wave spring 7 is used for applying axial pre-compression to the outer ring of the bearing 8. The problem of outer ring creep and bearing abnormal sound of the front bearing in the application process can be prevented by arranging the wave spring 7.

In this embodiment, the stator base 1 is provided with a mounting screw hole 10 connected to the foundation. The mounting screw holes 10 can be formed according to the specific conditions of the stator seat 10, and the size, depth and number of the screw holes can be determined, so that the device is firmly connected with a foundation, or a more stable and efficient connection mode can be selected according to the actual selection conditions of mounting.

By adopting the technical scheme, the inner circle of the framework sealing ring 9 is tightly matched with the outer rotor, and the sealing lip at the outer edge of the framework sealing ring 9 is contacted with the sealing matching surface of the stator seat, so that the device has the capability of completely isolating moisture from corroding the stator winding; no matter under the static and running states of the motor rotor, no matter whether the motor rotor is horizontally or vertically installed, the sealing structure can effectively prevent rainwater from entering the motor stator, the rainproof function of the motor is realized, the fan can be ensured to run around the clock under the application conditions of outdoor and extreme humid environments, the service life of the motor is effectively prolonged, and the occurrence of faults of the motor is reduced.

Example 2

In order to better implement the technical scheme of the utility model, the utility model also provides a fan which comprises an outer rotor motor, wherein an integral impeller 13 is fixedly arranged on a shell 6 of the outer rotor. By providing the outer rotor with mounting holes and flanges on the outer rotor housing 6, the fan's integral impeller or blades can be mounted on the outer rotor for rotation therewith.

The outer rotor motor for the fan is installed in a using mode that: the stator is fixed on the installation foundation by bolts, so that the stator 1 is a fixed piece, blades or integral impellers of the fan are installed on flange installation holes of the outer rotor 6 to form a rotating piece, and then the rotating piece is combined with other fan functional parts to form a complete fan for operation and use.

By adopting the technical proposal, the utility model can be directly used for the outdoor fan without additional shielding protection, the fan can be arranged horizontally or vertically, so that the effective dampproof and rainproof functions can be realized, and the fan can run around the clock; meanwhile, the fan is convenient to overhaul, the abrasion parts such as the framework seal and the bearing can be conveniently detached and replaced until a scheduled overhaul period is reached, and the fan is continuously ensured to stably run in the next overhaul period.

Although the specific embodiments of the utility model have been described above with reference to the accompanying drawings, it should not be construed that the utility model is limited to the embodiments described above: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An external rotor motor is characterized in that: comprises an outer rotor, a stator and a framework sealing ring (9); the outer rotor can rotate relative to the stator; the outer rotor comprises a shell (6) and a rotor shaft (12), and the shell (6) is provided with a stator core accommodating cavity; the stator comprises a stator seat (1) and a stator core (11); the stator core (11) is arranged in the stator core accommodating cavity; one end of the rotor shaft (12) is connected with the inner wall of the shell (6), and the other end of the rotor shaft penetrates through the stator core (11) to be connected with the stator seat (1); two ends of the stator seat (1) are contacted with the shell (6), and a framework sealing ring (9) is arranged between the stator seat (1) and the shell (6) to form a closed structure.

2. The external rotor motor according to claim 1, characterized in that: the housing (6) and the rotor shaft (12) form a mountain-shaped structure, the rotor shaft (12) is arranged on the inner wall of the housing (6), and the rotor shaft (12) is arranged in the stator core (11) in a penetrating way.

3. The external rotor motor according to claim 1, characterized in that: the framework sealing ring (9) is arranged on the outer rotor, the inner circle of the framework sealing ring (9) is tightly matched with the outer rotor, and the sealing lip at the outer edge of the framework sealing ring (9) is contacted with the sealing matching surface of the stator seat (1).

4. The external rotor motor according to claim 1, characterized in that: the stator core (11) is provided with a rotating shaft perforation and front and rear bearing chambers, the stator seat is provided with a mounting screw hole (10), two bearings (8) are mounted at two ends of the rotor shaft (12), an inner circle of each bearing (8) and the rotor shaft (12) form interference fit, an outer circle of each bearing (8) and the bearing chambers of the stator core (11) form clearance fit, the inner ring of each bearing close to the stator seat (1) is tightly pressed on the rotor shaft (12) through a pressing plate bolt (4) and a pressing plate (5), and the outer ring of each bearing close to the stator seat (1) is tightly pressed in the bearing chambers through a pressing plate bolt (2) and a pressing plate (3).

5. The external rotor motor according to claim 1, characterized in that: the bearing (8) far away from the stator seat (1) is in clearance fit with the bearing chamber, the outer ring of the bearing (8) can axially float in the bearing chamber, a wave spring (7) is arranged between the bearing (8) of the stator seat and the bearing chamber, and the wave spring (7) is used for applying axial precompression to the outer ring of the bearing (8).

6. The external rotor motor according to claim 1, characterized in that: the stator seat (1) is provided with a mounting screw hole (10) connected with the foundation.

7. A fan, characterized in that: an external rotor motor as claimed in any one of claims 1 to 6, wherein an integral impeller (13) is fixedly arranged on the housing (6) of the external rotor.