CN216312880U

CN216312880U - Air-cooled radiating fin in motor

Info

Publication number: CN216312880U
Application number: CN202122888399.XU
Authority: CN
Inventors: 吴奇才; 黄华秋; 淦吉昌
Original assignee: Nanchang Sanrui Intelligent Technology Co Ltd
Current assignee: Nanchang Sanrui Intelligent Technology Co Ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-04-15
Anticipated expiration: 2031-11-23

Abstract

The utility model discloses an air-cooled radiating fin in a motor, which comprises a radiating fin body, wherein one surface of the radiating fin body, which is in contact with the surface of an inner ring of an iron core, is an arc-shaped heat transfer surface, and a plurality of radiating fins are arranged on the surface, opposite to the arc-shaped heat transfer surface, of the radiating fin body at intervals. The radiating fin body is provided with the arc-shaped heat transfer surface and the air-cooled radiating fins, so that heat generated by the iron core can be efficiently and timely transmitted away.

Description

Air-cooled radiating fin in motor

Technical Field

The utility model relates to the technical field of motors, in particular to an air-cooled radiating fin in a motor.

Background

With the increasing power density of the motor, the heat dissipation problem is more and more severe; for an outer rotor brushless motor, there is a structural design that an air cooling fin is used inside the motor, but the air cooling fin is generally directly integrated on a motor stator. Because the contact surface of the iron core and the stator part is not compressed, and the silicone grease which is coated on the contact surface in advance can be scratched when the iron core is installed, the heat transfer effect is poor.

Disclosure of Invention

The utility model aims to solve the problems that: the utility model provides an air-cooled fin in motor is equipped with arc heat transfer surface and air-cooled radiating fin on the fin body, can the high efficiency with the timely transmission of the heat that the iron core produced away.

The technical scheme provided by the utility model for solving the problems is as follows: the air-cooled radiating fin in the motor comprises a radiating fin body, wherein one surface of the radiating fin body, which is in surface contact with the inner ring of an iron core, is an arc-shaped heat transfer surface, and a plurality of radiating fins are arranged on the surface, opposite to the arc-shaped heat transfer surface, of the radiating fin body at intervals.

Preferably, one end of each radiating fin, which is far away from the radiating fin body, forms an arc shape.

Preferably, a plurality of the heat dissipation fins are arranged in parallel.

Preferably, the radiating fin body is provided with a weight reduction groove.

Preferably, the four weight-reducing grooves are symmetrically distributed on two sides of the radiating fin body.

Preferably, the two sides of the radiating fin body are provided with fixing holes for the positioning mechanism.

Compared with the prior art, the utility model has the advantages that: the radiating fin body is provided with the arc-shaped heat transfer surface and the air-cooled radiating fins, so that heat generated by the iron core can be efficiently and timely transmitted away.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model.

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic perspective view of the present invention in another orientation;

fig. 3 is a top view of the present invention.

The attached drawings are marked as follows: 1. the heat radiating fin comprises a heat radiating fin body, a positioning mechanism fixing hole, a weight reducing groove, a heat radiating fin and an arc-shaped heat transfer surface, wherein the heat radiating fin body 2 is provided with a positioning mechanism fixing hole 3.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the utility model, "a number" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

The specific embodiment of the utility model is shown in fig. 1-3, 1, an air-cooled heat sink in a motor, which comprises a heat sink body 1, wherein one surface of the heat sink body 1, which is in contact with the surface of an inner ring of an iron core, is an arc-shaped heat transfer surface 5, and a plurality of heat sink fins 4 are arranged on the surface of the heat sink body 1, which is opposite to the arc-shaped heat transfer surface 5, at intervals.

As another embodiment of the present invention, one end of the plurality of heat dissipation fins 4 away from the heat dissipation fin body 1 is formed in an arc shape. The heat dissipation fins 4 are far away from one end of the heat dissipation fin body 1 to form an arc shape, so that the heat dissipation of the whole heat dissipation fin is more uniform, and the heat dissipation effect is improved.

As another embodiment of the present invention, a plurality of the heat dissipation fins 4 are arranged in parallel with each other.

As another embodiment of the present invention, the heat sink body 1 is provided with a weight-reducing groove 3. The weight-reducing grooves can reduce the weight of the radiating fins, reduce the heat transferred to the stator by the iron core near the weight-reducing holes, and reduce the temperature rise of the stator as much as possible so as to prolong the service life of the bearing in the stator.

As another embodiment of the present invention, four weight-reducing grooves 3 are symmetrically distributed on both sides of the heat sink body 1.

As another embodiment of the present invention, the two sides of the heat sink body 1 are provided with positioning mechanism fixing holes 2.

It should be noted that the cooling fins of the split design of the present invention can be embedded into 4 grooves (the number of the cooling fins can be greater than or equal to 4) on the wall surface of the stator outer ring, each cooling fin is an independent part, and can be processed by a wire cutting process. In the wire cutting process, due to the electric spark effect between the wire and the processed workpiece, the processed surface has a micro rough surface structure, so that the effect of heat transfer between the radiating fin and air is enhanced.

Split type fin, cooperation wire-electrode cutting technology can process out the radiating fin that far away is finer than CNC machine tooling cutter, and the effect is shown in the special processing of wire-electrode cutting technology simultaneously, greatly promotes the radiating efficiency of fin, reduces the processing cost by a wide margin. The stator directly integrated with the heat sink cannot process such fine heat sink fins. Through calculation, the heat dissipation area in a unit space can be theoretically increased by about 15-20 times.

The split radiating fin can be matched with a compressing structure to compress an arc-shaped heat transfer surface to the inner wall surface of the iron core, and a certain moving space can be used for smearing silicone grease when the radiating fin is at the minimum position and cannot scrape the smeared silicone grease when the radiating fin is installed in the iron core. While the cooling fins integrated on the stator do not achieve a pressing effect.

In the utility model, the airflow flows through the radiating fins at high speed to exchange heat. According to the air exhaust capacity of the centrifugal fan inside the motor, the tooth thickness and the distance of the radiating fins are designed in an optimized size, so that air flow can smoothly flow through the radiating fins, a sufficient radiating area is guaranteed, and the radiating efficiency is maximized. The motor has the cavity runner that corresponds to hold every fin, and according to specific motor design, the air current that flows through the fin can make from the top down, also can be from the bottom up, and the centrifugal fan or the extra updraft ventilator that depend on the motor arrange in the top or the below of fin runner.

The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the utility model as defined by the independent claims are intended to be embraced therein.

Claims

1. The utility model provides an air-cooled fin in motor which characterized in that: the radiating fin comprises a radiating fin body (1), wherein one surface of the radiating fin body (1) in surface contact with the inner ring of the iron core is an arc-shaped heat transfer surface (5), and a plurality of radiating fins (4) are arranged on the surface of the radiating fin body (1) opposite to the arc-shaped heat transfer surface (5) at intervals.

2. The air-cooled heat sink in an electric machine according to claim 1, wherein: one end of the plurality of radiating fins (4) far away from the radiating fin body (1) forms an arc shape.

3. An air-cooled heat sink in an electric machine according to claim 1 or 2, wherein: the plurality of radiating fins (4) are arranged in parallel.

4. The air-cooled heat sink in an electric machine according to claim 1, wherein: the radiating fin body (1) is provided with a weight reduction groove (3).

5. The air-cooled heat sink in an electric machine according to claim 4, wherein: the four weight-reducing grooves (3) are symmetrically distributed on two sides of the radiating fin body (1).

6. The air-cooled heat sink in an electric machine according to claim 1, wherein: and positioning mechanism fixing holes (2) are formed in two sides of the radiating fin body (1).