CN211351959U

CN211351959U - Aluminum rotor inner fan

Info

Publication number: CN211351959U
Application number: CN201922328305.6U
Authority: CN
Inventors: 徐玉宇
Original assignee: Wuxi Dongyuan Motor Co ltd
Current assignee: Wuxi Dongyuan Motor Co ltd
Priority date: 2019-12-22
Filing date: 2019-12-22
Publication date: 2020-08-25
Anticipated expiration: 2029-12-22

Abstract

The utility model aims to provide an aluminum rotor inner fan, which can fully radiate heat under the condition that the inner space of a motor is compressed to the limit; comprises a shaft 1, an inner fan 2, an air guide 3, an aluminum rotor 4 and an air hole 5; the inner fan 2 and the aluminum rotor 4 are horizontally coaxial and are sequentially arranged on the shaft 1 from left to right in sequence; the air guide 3 is arranged between the inner fan 2 and the aluminum rotor 4; the air guide 3 extends towards the aluminum rotor 4 along the edge of one side, close to the aluminum rotor 4, of the inner fan 2, and the air guide 3 and the axis of the aluminum rotor 4 are horizontally arranged; the horizontal distance between the right end of the wind guide 3 and the aluminum rotor 4 is X, and the value of X is 0-5 mm; the vertical distance between the wind guide 3 and the aluminum rotor 4 is Y, and the Y value is 0-5 mm; the utility model has the advantages that: in the internal space of the motor with the limit compression, a good heat dissipation function is provided, and the motor efficiency and the use safety are improved.

Description

Aluminum rotor inner fan

Technical Field

The utility model relates to the field of electric machines, especially, relate to an aluminium rotor inner fan.

Background

Under the current social background of energy conservation and environmental protection, the requirement of energy conservation of the motor is higher and higher. Under the same power, motor manufacturers generally pursue that the smaller the motor is, the better the motor is, and the higher the efficiency is, the better the motor is. However, the smaller the motor, the higher the efficiency, the higher the motor temperature rise will be, and how to reduce the problem of motor temperature rise is in urgent need of solving.

In the running process of the motor, heat is accumulated continuously due to motor loss, so that the temperature in the motor rises gradually. If there is not reasonable, quick effectual circulative cooling wind path structure, the inside temperature of motor rises fast and can lead to insulating life's reduction, appears the motor scaling loss even. Meanwhile, the base of the motor is often enlarged because the temperature rise of the motor cannot meet the technical requirements, so that the volume and the weight of the motor are increased, the cost is increased, and the competitiveness is lost.

The published Chinese utility model patent has the publication number: CN203214407U, patent name: motor cooling fan, application date: 20130316, it discloses a motor cooling fan, including frustum form base, interior fan board and the outer fan board that is provided with the shaft hole, interior fan board and outer fan board all are the horn mouth form, interior fan board rear end edge and base front end edge connection, and interior fan board and base are installed in outer fan board, install a plurality of baffles between outer fan board and the interior fan board perpendicularly, and the shaft hole inner wall of base is provided with the keyway. The inner fan plate and the outer fan plate of the motor cooling fan are both in a horn mouth shape, the volume of the space between the adjacent partition plates is increased, the generated air pressure is high, the air volume is large, and the heat dissipation requirement of the mining variable frequency motor is met. The tail cylinder arranged at the rear part can be aligned to the motor, high-temperature airflow is sucked away as much as possible, the airflow flow track is smooth in the process of pumping the high-temperature airflow out, the airflow flow speed is high, and the heat dissipation capacity of the fan is further improved.

Under the manufacturing trend of the current energy-efficient miniaturized compact motor, the space inside the motor is compressed to the utmost extent, how to solve the problem that the whole temperature rise of winding is reduced to the ventilation heat dissipation of high-speed motor tip more high-efficiently, promote motor efficiency, reach the miniaturized purpose of motor and all be in the problem of striving to solve of each motor manufacturer.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an aluminium rotor inner fan under the condition that the motor inner space was compressed by the limit, can provide abundant heat dissipation.

The utility model provides an aluminum rotor inner fan, which comprises a shaft 1, an inner fan 2, an air guide 3, an aluminum rotor 4 and an air hole 5;

the inner fan 2 and the aluminum rotor 4 are horizontally coaxial and are sequentially arranged on the shaft 1 from left to right in sequence; the air guide 3 is arranged between the inner fan 2 and the aluminum rotor 4; the air guide 3 extends towards the aluminum rotor 4 along the edge of one side, close to the aluminum rotor 4, of the inner fan 2, and is arranged at an angle with the edge of one side, close to the aluminum rotor 4, of the inner fan 2; the wind guide 3 and the axis of the aluminum rotor 4 are horizontally arranged;

the horizontal distance between the right end of the wind guide 3 and the aluminum rotor 4 is X, and the value of X is 0-5 mm; the vertical distance between the wind guide 3 and the aluminum rotor 4 is Y, and the Y value is 0-5 mm.

Preferably, the wind guide 3 is horizontally disposed between the aluminum rotor 4 and the shaft 1.

The utility model has the advantages that: in the internal space of the motor with the limit compression, a good heat dissipation function is provided, and the motor efficiency and the use safety are improved. The users with harsh motor environments, such as paper industry, air and water pumps and air compressors in closed spaces, have high temperature of the motor using environment and the motor is always operated in full load, so that the motor winding and high temperature alarm of internal gas are frequently generated and the motor is stopped. On the premise of not amplifying the motor base and increasing the cost, the temperature rise of the whole motor is reduced by about 20 ℃, so that the temperature rise of the motor body is effectively controlled, and the motor is effectively guaranteed to be continuously and reliably used by a miniaturized motor.

Drawings

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

FIG. 2 is a schematic view of an improved front air guide structure;

FIG. 3 is a schematic view of the wind direction of the present invention;

in the figure, the position of the upper end of the main shaft,

1. a shaft; 2. an inner fan; 3. wind guiding; 4. an aluminum rotor; 5. and (4) air holes.

Detailed Description

The present invention will now be described in detail with reference to the drawings, which are provided for illustrative and explanatory purposes only and should not be construed as limiting the scope of the present invention in any way.

In the present embodiment, the wind guide 3 is preferably horizontally disposed between the aluminum rotor 4 and the shaft 1.

Compared with the figure 2, the air guide 3 in the figure 1 extends into the area between the aluminum rotor 4 and the shaft 1 to form a more compact air duct, the cylinder formed by the air guide 3 is smaller than the original cylinder, and the air holes 5 tightly wrapping the aluminum rotor 4 are easier to form smooth turbulent flow; the wind guide 3 can guide the wind in the wind hole 5 out better.

Compared with fig. 2, the area of the inner fan 2 in fig. 1 is increased by 50%, and the air output of the inner fan can be increased by 60% as shown by actual test data in combination with smaller cylindrical air guide.

After the air output of the inner fan 2 is increased by 60%, the flow speed of air flow inside the motor is greatly improved, more heat is transmitted to the motor shell or is distributed out from an air duct along with the air flow, and the integral temperature rise of the motor is reduced by about 20 ℃.

Fig. 3 shows an air path of the aluminum rotor inner fan in the cast iron housing motor according to the present invention, i.e. a wind direction indicated by an arrow in the figure.

Wind path trend: after 2 rotations of fan in the centrifugation, fan 2 in the inside hot-air of motor flows to through 5 flows of wind holes of aluminium rotor 4, and interior fan 2 rotates and blows the wind channel of hot-air to motor housing through centrifugal force, and the hot-air in the wind channel gives off the heat to the heat through the heat-conduction fin that heat-conduction transmitted on shell and shell, and the air that falls through the wind channel is under the effect at the wind pressure and continues to flow to aluminium rotor wind hole 5, just so forms a circulation.

It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do 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, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The above-mentioned embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An aluminum rotor inner fan comprises a shaft (1), an inner fan (2), an air guide (3), an aluminum rotor (4) and an air hole (5);

it is characterized in that the preparation method is characterized in that,

the inner fan (2) and the aluminum rotor (4) are horizontally coaxial and are sequentially arranged on the shaft (1) from left to right; the air guide (3) is arranged between the inner fan (2) and the aluminum rotor (4); the air guide (3) extends towards the aluminum rotor (4) along the edge of one side, close to the aluminum rotor (4), of the inner fan (2) and is arranged at an angle with the edge of one side, close to the aluminum rotor (4), of the inner fan (2); the wind guide (3) and the axis of the aluminum rotor (4) are horizontally arranged;

the horizontal distance between the right end of the air guide (3) and the aluminum rotor (4) is X, and the X value is 0-5 mm; the vertical distance between the wind guide (3) and the aluminum rotor (4) is Y, and the Y value is 0-5 mm.

2. An aluminium rotor inner fan according to claim 1, characterised in that the wind guide (3) is arranged horizontally between the aluminium rotor (4) and the shaft (1).