A cooling system for a fan-cooled electric machine

Abstract

The utility model belongs to motor technical field discloses a kind of air-cooled motor cooling systems, including inner shell, the outer shell of being arranged in the outer portion of inner shell, the centrifugal fan being arranged in the one side of motor stator and with the coaxial output shaft of motor and the air inlet volute being arranged in the one side of centrifugal fan, inner shell is sleeved on motor stator, and inner shell outer portion is equipped with several axial fin groups for auxiliary heat dissipation.The utility model improves the good cooling effect, and also realizes the characteristics of small space occupation, very suitable for the installation and use of motor.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to an air-cooled motor cooling system. Background Technology

[0002] Motors generate heat during operation. If this heat is not dissipated in time, the motor temperature will rise too high, burning out the internal stator windings. The conventional method for motor cooling is through an internal fan. For example, in China... Patent document (CN206117385U) discloses a high-efficiency air-cooled motor, including a base body, several heat dissipation ribs disposed on the outer surface of the base body, a motor shaft, and a motor fan mounted on the motor shaft. A fan guide plate is disposed on the outer side of the motor fan, with an equal gap between the inner surface of the fan guide plate and the outer sides of each fan blade. Several air guide covers are disposed around the outer periphery of the heat dissipation ribs, with the air guide covers spaced apart between the tops of adjacent heat dissipation ribs. An air guide cavity is formed between two heat dissipation ribs, the air guide covers, and the base body, with the air inlet end of the air guide cavity located on the base body near the motor fan. This high-efficiency air-cooled motor can improve the airflow of the motor fan, enhance the motor's heat dissipation effect, and increase the motor's efficiency.

[0003] However, the cooling effect of using a fan is not very obvious. In conventional air-cooled motors, whether using coaxial fan blades, independent fans, or fan blades built into the rotor, wind wear will occur. In order to improve the heat dissipation effect of the motor, reduce wind loss, and improve the motor performance, this air duct cooling method was invented.

[0004] For permanent magnet synchronous motors with the same electromagnetic structure and equivalent performance, water-cooled structures are heavier than air-cooled structures and require accessories such as cooling fans, cooling water pumps, cooling pipes, and radiators, making the system more complex and increasing the overall cost. Traditional air-cooled structures are simpler, but have poorer heat dissipation capacity for the same volume.

[0005] Therefore, a high-efficiency air-cooled motor is proposed. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model provides an air-cooled motor cooling system that can achieve the effects of small footprint and good cooling effect.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a wind-cooled motor cooling system, comprising: Inner housing, which is fitted onto the motor stator; The outer shell is located outside the inner shell; Centrifugal fan, located on one side of the motor stator and coaxial with the motor's output shaft; Intake volute; The inner shell is provided with several axial fin groups for auxiliary heat dissipation.

[0008] Preferably, the inner shell and the outer shell are arranged coaxially.

[0009] Preferably, a fan motor is also arranged on one side of the centrifugal fan.

[0010] Preferably, the axial fin assembly comprises: Short fin assembly, the short fin assembly being used for airflow disturbance; Long fin assembly, the long fin assembly being used for heat dissipation; The short fin group and the long fin group are arranged alternately. The short fin group includes a number of short fins arranged at equal intervals, and the long fin group includes a number of long fins arranged at equal intervals.

[0011] Preferably, each of the short fins is distributed in the gap between two long fins.

[0012] Preferably, the distance between the short fin group and the long fin group is equal to the width of the short fin.

[0013] Preferably, the short fin group and the long fin group are offset by an angle of - degrees in the circumferential direction.

[0014] Preferably, the inner wall of the outer casing is provided with a plurality of heat dissipation grooves.

[0015] Preferably, a heat sink is provided on the outside of the outer casing.

[0016] Preferably, a dustproof net is provided at the air inlet of the air intake volute.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) By arranging an inner shell and an outer shell outside the stator, and by arranging short fins and long fins, the heat dissipation effect is improved; (2) By arranging a centrifugal fan on one side of the stator, an air passage is formed in the inner and outer shells to achieve wind cooling of the motor. Attached Figure Description Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the inner shell of this utility model; Figure 3 This is a front view of the inner shell of this utility model; Figure 4 for Figure 3 Schematic diagram of the structure at point A in the diagram; Figure 5 This is a schematic diagram of the outer shell of this utility model; Figure 6 This is a schematic diagram of the structure of the intake volute of this utility model.

[0018] Explanation of reference numerals in the attached figures: 1-Inner shell, 101-Short fin, 102-Long fin, 2-Outer shell, 201-Heat dissipation slot, 202-Heat dissipation fin, 3-Centrifugal fan, 4-Intake volute, 5-Dust filter. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1 like Figures 1 to 6 As shown, the air-cooled motor cooling system provided in this embodiment includes an inner housing 1 sleeved on the motor stator and an outer housing 2 arranged outside the inner housing 1. The inner housing 1 and the outer housing 2 are arranged coaxially. A centrifugal fan 3 is arranged on one side of the motor stator and coaxially with the output shaft of the motor. An air intake volute 4 is arranged on one side of the centrifugal fan 3. The inner housing 1 and the outer housing 2 are arranged coaxially. The centrifugal fan 3 can be directly driven by a motor, and the centrifugal fan 3 is mounted on the output shaft of the motor; in addition, a fan motor can also be arranged on one side of the centrifugal fan 3, using an independent motor to drive the centrifugal fan 3 to rotate. When the centrifugal fan 3 is driven, it causes airflow to enter the motor from the intake volute 5 to cool the rotor and stator of the motor. The heat generated by the motor is blown away and dissipated from the inner casing 1 and the outer casing 2.

[0021] Example 2 Based on Embodiment 1, a plurality of axial fin groups for auxiliary heat dissipation are provided on the outside of the inner shell 1.

[0022] Specifically, the axial fin group includes a group of short fins for airflow turbulence and a group of long fins for heat dissipation. The short fin group and the long fin group are arranged alternately. The short fin group includes several short fins 101 arranged at equal intervals, and the long fin group includes several long fins 102 arranged at equal intervals. Each short fin 101 is distributed in the gap between two long fins 102. The distance between the short fin group and the long fin group is the width of the short fin 101. The short fin group 101 and the long fin group 102 are offset in the circumferential direction at a certain angle, with the angle value being 1 degree to 5 degrees. This increases the contact area with air without affecting the airflow, thereby further increasing the heat dissipation effect.

[0023] Example 3 Based on Embodiment 2, this application further proposes to arrange a plurality of heat dissipation grooves 201 on the inner wall of the outer casing 2 to increase the heat absorption area of ​​the outer casing 2 inside the motor. At the same time, heat dissipation fins 202 are provided on the outside of the outer casing 2 to increase the contact area with the outside air and further improve the heat dissipation effect.

[0024] This application further proposes that a dustproof net 5 be arranged at the air inlet of the air intake volute 4. When the centrifugal fan 3 rotates, the resulting airflow enters the motor through the air inlet. Therefore, when the airflow passes through the dustproof net 5, it can block debris from entering the motor and achieve a protective effect.

[0025] When in use, the fan motor starts and drives the centrifugal fan 3 to draw air into the motor. External cold air enters the motor to form an air passage, which blows the heat onto the inner shell 1. The short fins 101 on the inner shell 1 play a role in turbulence, while the long fins 102 increase the contact area between the inner shell and the air, thereby improving the heat dissipation effect.

[0026] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A cooling system for an air-cooled motor, characterized in that, include: Inner housing (1), which is fitted onto the motor stator; The outer shell (2) is arranged outside the inner shell (1); Centrifugal fan (3) is arranged on one side of the motor stator and is coaxial with the output shaft of the motor; Intake volute (4); The inner shell (1) is provided with several axial fin groups for auxiliary heat dissipation.

2. The air-cooled motor cooling system according to claim 1, characterized in that, The inner shell (1) and the outer shell (2) are arranged coaxially.

3. The air-cooled motor cooling system according to claim 1, characterized in that, A fan motor is also arranged on one side of the centrifugal fan (3).

4. The air-cooled motor cooling system according to claim 1, characterized in that, The axial fin assembly includes: Short fin assembly, the short fin assembly being used for airflow disturbance; Long fin assembly, the long fin assembly being used for heat dissipation; The short fin group and the long fin group are arranged alternately. The short fin group includes a number of short fins (101) arranged at equal intervals, and the long fin group includes a number of long fins (102) arranged at equal intervals.

5. The air-cooled motor cooling system according to claim 4, characterized in that, Each of the short fins (101) is distributed in the gap between two long fins (102).

6. The air-cooled motor cooling system according to claim 5, characterized in that, The distance between the short fin group and the long fin group is the width of the short fin (101).

7. The air-cooled motor cooling system according to claim 1, characterized in that, The short fin group (101) and the long fin group (102) are offset by an angle of 1-5 degrees in the circumferential direction.

8. The air-cooled motor cooling system according to claim 5, characterized in that, The inner wall of the outer casing (2) is provided with several heat dissipation grooves (201).

9. A wind-cooled motor cooling system according to claim 5, characterized in that, The outer casing (2) is provided with heat sinks (202).

10. A wind-cooled motor cooling system according to claim 5, characterized in that, A dustproof net (5) is arranged at the air inlet of the air intake volute (4).

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