CN220122699U - Outer rotor motor heat dissipation wind channel - Google Patents
Outer rotor motor heat dissipation wind channel Download PDFInfo
- Publication number
- CN220122699U CN220122699U CN202320334757.9U CN202320334757U CN220122699U CN 220122699 U CN220122699 U CN 220122699U CN 202320334757 U CN202320334757 U CN 202320334757U CN 220122699 U CN220122699 U CN 220122699U
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- CN
- China
- Prior art keywords
- end cover
- motor
- air duct
- rear end
- heat dissipation
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 22
- 238000009423 ventilation Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Motor Or Generator Cooling System (AREA)
Abstract
The utility model relates to an outer rotor motor heat dissipation air duct which comprises a motor rotating shaft, a motor shell, a front end cover with rotating blades, a rear end cover and a bearing, wherein the front end cover is connected with the motor shell and provided with rotating blades; the rear end cover is provided with a plurality of ventilation openings, the front end cover is provided with a plurality of air outlet ventilation grooves in an array manner, and a labyrinth air duct is formed between the rear end cover and the motor shell; compared with the prior art, the output end is changed into the rotor end, the section of the fan at the output end is changed from rectangular to trapezoidal, and the section of the blade is increased, so that the heat dissipation capacity is increased; the end faces of the two end covers are provided with an air outlet through groove and an air vent, and a labyrinth air duct is additionally arranged, so that air flow enters from the air vent, rapidly flows between the stator and the rotor in the motor shell, and then flows out from the air outlet through groove, thereby rapidly taking away heat generated in the motor.
Description
Technical Field
The utility model relates to a motor, in particular to a heat dissipation air duct of an outer rotor motor.
Background
The motor is a common mechanical device and consists of a rotor, a stator, a rotating shaft, a cooling fan and a shell, wherein the rotor is fixed in the shell; the shell is relatively fixed, the rotor rotates relative to the shell and the stator, in the rotating process, a large amount of heat can be accumulated in the shell because the stator is arranged in the shell, the heat dissipation fan can only generally take away the heat of the outer surface of the shell, the heat in the shell needs to be conducted to the surface of the shell, and the heat dissipation fan takes away the heat of the surface of the shell, so that the heat dissipation effect of the motor is relatively poor, and particularly for some high-speed rotating motors, if the heat in the shell cannot be dissipated, the motor can be scalded, and the service life of the motor is influenced.
Disclosure of Invention
The utility model aims to provide a heat dissipation air duct of an outer rotor motor.
The technical aim of the utility model is realized by the following technical scheme: the outer rotor motor heat dissipation air duct comprises a motor rotating shaft, a motor shell, a front end cover connected with the motor shell and provided with rotating blades, and a rear end cover, wherein a bearing is arranged between the rear end cover and the motor rotating shaft; the novel motor is characterized in that a plurality of ventilation openings are formed in the rear end cover, a plurality of air outlet ventilation grooves are formed in the front end cover in an array mode, and a labyrinth air duct is formed between the rear end cover and the motor shell.
By adopting the technical scheme, compared with the prior art, the output end is changed into the rotor end, the section of the fan at the output end is changed from a rectangle into a trapezoid, and the section of the blade is increased, so that the heat dissipation capacity is increased; the end faces of the two end covers are provided with an air outlet through groove and an air vent, and a labyrinth air duct is additionally arranged, so that air flow enters from the air vent, rapidly flows between the stator and the rotor in the motor shell, and then flows out from the air outlet through groove, thereby rapidly taking away heat generated in the motor.
Preferably, the labyrinth air duct is an L-shaped air duct, and the labyrinth air duct is communicated with the inside of the motor shell.
Preferably, the rotating fan blade on the front end cover is a centrifugal impeller.
Preferably, the section of the rotating fan blade on the front end cover is trapezoidal.
Preferably, the front end cover air outlet through groove is arranged on the end face of the front end cover, and the ventilation opening is arranged on the end face of the rear end cover.
By adopting the technical scheme, an axial air inlet and outlet loop is formed.
Preferably, the ratio of the inner diameter of the rear end cover to the outer diameter of the motor shell is 1:1.1-1.2.
In summary, the utility model has the following beneficial effects:
1. compared with the prior art, the output end is changed into the rotor end, the section of the fan at the output end is changed from rectangular to trapezoidal, and the section of the blade is increased, so that the heat dissipation capacity is increased; the end faces of the two end covers are provided with an air outlet through groove and an air vent, and a labyrinth air duct is additionally arranged, so that air flow enters from the air vent, rapidly flows between the stator and the rotor in the motor shell, and then flows out from the air outlet through groove, thereby rapidly taking away heat generated in the motor.
Drawings
FIG. 1 is a schematic view of the overall structure in an embodiment;
FIG. 2 is a cross-sectional view of the overall structure in an embodiment;
fig. 3 is a side view of the overall structure i in an embodiment.
In the figure, 1, a motor rotating shaft; 2. a motor housing; 21. a front end cover; 211. an air outlet through groove; 22. a rear end cover; 23. a bearing; 24. a vent; 25. labyrinth air duct.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment, which may not creatively contribute to the present utility model as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present utility model.
Examples:
the outer rotor motor cooling air duct comprises a motor rotating shaft 1, a motor shell 2, a front end cover 21 with rotating blades, a rear end cover 22 and a bearing 23, wherein the front end cover 21 is connected with the motor shell 2 and provided with rotating blades, and the bearing 23 is arranged between the rear end cover 22 and the motor rotating shaft 1; the rear end cover 22 is provided with a plurality of ventilation openings 24, the front end cover 21 is provided with a plurality of ventilation grooves 211 in an array manner, and a labyrinth air duct 25 is formed between the rear end cover 22 and the motor casing 2.
As shown in fig. 2, the labyrinth air duct 25 is an L-shaped air duct, and the labyrinth air duct 25 is communicated with the inside of the motor casing 2; the air flow enters from the ventilation opening 24 and the labyrinth air duct 25 and flows out from the air outlet through groove 211, so that heat in the motor is taken away.
As shown in fig. 1 and 3, the ventilation opening 24 and the ventilation opening slot 211 are both arranged on the end surface, so that the passage of the air flow can be reduced, and the heat dissipation efficiency is maximized.
As shown in fig. 2, the rotating fan blade on the front end cover 21 is a centrifugal impeller.
As shown in fig. 2, the cross section of the rotary blade on the front cover 21 is trapezoidal, and the cross section of the blade becomes large, so that the heat dissipation capacity increases.
As shown in fig. 2, the ratio of the inner diameter of the rear cover 22 to the outer diameter of the motor housing 2 is 1:1.1-1.2, the proportional relation of the dimensions determines the air intake of the labyrinth air duct 25, and theoretically, the larger the dimension of the labyrinth air duct is, the better the heat dissipation effect is, but the larger the aperture is, the dust and the like can be accumulated in the motor rapidly, and the heat dissipation effect is affected, so the dimension is the most preferable.
Similarly, setting the ventilation opening and the ventilation opening slot, too large openings may cause dust and impurities to enter and accumulate inside, thereby affecting heat dissipation, but too small openings may not achieve good heat dissipation effect.
And detecting the brushless motor during working and non-working, uploading relevant data to simulation software for simulation calculation, setting the ambient temperature and the end face temperature of the rotor iron core to be 22 ℃, increasing the overall temperature of the motor when the motor runs at full speed, and basically stabilizing the motor to enter steady-state operation when the motor runs to 4000S, wherein the rotating speed is 2800r/min, the power is 14.5KW, the temperature of the stator iron core is about 52.2 ℃, the central temperature of the stator winding is the highest, and the temperature of the stator winding is about 140.2 ℃.
Establishing a motor model by utilizing AnsysMaxwell simulation software, designing motor electromagnetic parameters, performing simulation calculation, and calculating the heat dissipation capacity A1 of the surface of the shell and the air flow speed V (air) and the shell temperature T (J) when the simulation calculation of a temperature field is performed, wherein the calculation relation is as follows:
the heat dissipation capacity A2 of the rotor core is related to the surface air flow speed, which is affected by the rotor linear speed W, so the calculation formula in the simulation field is:
W＝πDn/60
A2＝15+6.5W 0.7
if the outer diameter of the rotor core is 226.4mm, the heat dissipation capacity between the rotor core and the end face is 90.42W/(m) 2 K)。
In summary, the simulation software is used for simulating and calculating the temperature field of the motor during operation, motors with different sizes can be imported into the simulation software for heat estimation, the length of airflow passing through the motor, the air viscosity, the full rate of motor winding grooves, the paint dipping process and the like can be set more accurately, the required airflow speed is calculated according to the requirements of customers by controlling the temperature of the motor to be lower than the temperature of the motor and the like if the requirements are met, and the opening size and the like are set according to the airflow speed, so that the most suitable motor size index and process index are obtained.
Claims (6)
1. The utility model provides an external rotor motor heat dissipation wind channel which characterized in that: the motor comprises a motor rotating shaft (1) and a motor shell (2), and further comprises a front end cover (21) with rotating blades, and a rear end cover (22), wherein the front end cover (21) is connected with the motor shell (2), and a bearing (23) is arranged between the rear end cover (22) and the motor rotating shaft (1); a plurality of ventilation openings (24) are formed in the rear end cover (22), a plurality of air outlet ventilation grooves (211) are formed in the front end cover (21) in an array mode, and a labyrinth air duct (25) is formed between the rear end cover (22) and the motor casing (2).
2. The external rotor motor cooling air duct of claim 1, wherein: the labyrinth air duct (25) is an L-shaped air duct, and the labyrinth air duct (25) is communicated with the inside of the motor shell (2).
3. The external rotor motor cooling air duct of claim 1, wherein: the rotating fan blade on the front end cover (21) is a centrifugal impeller.
4. The external rotor motor cooling air duct according to claim 3, wherein: the section of the rotating fan blade on the front end cover (21) is trapezoidal.
5. The external rotor motor cooling air duct of claim 1, wherein: the front end cover air outlet through groove (211) is arranged on the end face of the front end cover (21), and the ventilation opening (24) is arranged on the end face of the rear end cover (22).
6. The external rotor motor cooling air duct of claim 5, wherein: the ratio of the inner diameter of the rear end cover (22) to the outer diameter of the motor shell (2) is 1:1.1-1.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320334757.9U CN220122699U (en) | 2023-02-28 | 2023-02-28 | Outer rotor motor heat dissipation wind channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320334757.9U CN220122699U (en) | 2023-02-28 | 2023-02-28 | Outer rotor motor heat dissipation wind channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220122699U true CN220122699U (en) | 2023-12-01 |
Family
ID=88915862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320334757.9U Active CN220122699U (en) | 2023-02-28 | 2023-02-28 | Outer rotor motor heat dissipation wind channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220122699U (en) |
-
2023
- 2023-02-28 CN CN202320334757.9U patent/CN220122699U/en active Active
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