CN110957838A - Motor casing capable of efficiently dissipating heat and heat dissipation method thereof - Google Patents
Motor casing capable of efficiently dissipating heat and heat dissipation method thereof Download PDFInfo
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- CN110957838A CN110957838A CN201911032801.5A CN201911032801A CN110957838A CN 110957838 A CN110957838 A CN 110957838A CN 201911032801 A CN201911032801 A CN 201911032801A CN 110957838 A CN110957838 A CN 110957838A
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- fan
- heat
- end cover
- shell
- motor
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 10
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 14
- 239000004519 grease Substances 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 4
- 239000005341 toughened glass Substances 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 21
- 230000000694 effects Effects 0.000 claims description 12
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 11
- 238000012546 transfer Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a motor shell capable of efficiently dissipating heat, which belongs to the technical field of motors and comprises a cylindrical shell for accommodating a motor, a front end cover and a rear end cover; the shell is of a double-layer structure, and heat-conducting silicone grease is filled in the shell; the fan is driven to rotate through the output shaft, a fan cover is arranged outside the fan, and a plurality of fan-shaped grids are arranged on the surface of the fan cover at intervals; the rear end cover is composed of a metal heat dissipation plate, and a plurality of protruding heat dissipation fins are arranged on two sides of the rear end cover; the temperature measuring device is characterized in that an openable observation port is formed in the surface of the shell, temperature measuring paper is attached to the inner surface of the observation port, and the observation port is a toughened glass port. Compared with the prior art, the motor casing provided by the invention has high-efficiency heat dissipation performance, simple structure and convenience in installation, and can quickly check the working critical temperature of the motor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor shell capable of efficiently dissipating heat and a heat dissipation method thereof.
Background
The motor is an electromagnetic device which realizes electric energy conversion or transmission through an electromagnetic induction law. During the operation of the motor, the electric energy and the mechanical energy are mutually converted through electromagnetic conversion and the movement of the rotor, a large amount of heat can be generated in the process, if the heat can not be effectively discharged, the working performance of the motor can be seriously influenced when the heat is accumulated to a certain degree, and even part of components and parts are damaged, so that the good heat dissipation performance is the key point for ensuring the reliability and the service life of the motor.
The motor heat dissipation among the prior art mostly adopts from the heat dissipation, dispels the heat through the heat conduction mode, because the functional device in the motor is more, and the heat accumulation after long-time the use gradually increases, and the radiating rate of conduction mode can't follow up, and the radiating effect is very poor from the radiating effect, can't satisfy the demand that the motor used for a long time. Some motors additionally provided with fans in the market are mainly provided with the fans outside the shell, heat transfer of the motors can be accelerated to dissipate heat when reaching the position of the fans, the effect of heat transfer inside the motors is general, and true convection heat dissipation cannot be achieved.
In addition, due to the difference of the operating environments of the motors, particularly in the fields of ships, aviation and the like, the phenomenon of motor damage inevitably occurs, many troubleshooting needs to be carried out by feeding back whether the internal temperature of the motor reaches a critical value, and some motors are realized by internal temperature sensors, but the mode not only increases the cost, but also is easy to damage in a complex working environment.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the motor casing which has a good heat dissipation effect and is simple to mount and capable of quickly judging whether the working temperature of the motor reaches a critical value.
In order to achieve the purpose, the invention adopts the following technical scheme:
a motor casing with high-efficiency heat dissipation comprises a cylindrical shell for accommodating a motor, a front end cover and a rear end cover; the shell is of a double-layer structure, and heat-conducting silicone grease is filled in the shell; the fan is driven to rotate by the output shaft, a fan cover fixedly connected with the front end cover is arranged outside the fan, and a plurality of fan-shaped grids are arranged on the surface of the fan cover at intervals; the rear end cover is composed of a metal heat dissipation plate, and a plurality of protruding heat dissipation fins are arranged on two sides of the rear end cover; the temperature measuring device is characterized in that an openable observation port is formed in the surface of the shell, temperature measuring paper is attached to the inner surface of the observation port, and the observation port is a toughened glass port.
Preferably: the inner side of the front end cover is provided with a rolling bearing-like piece, the rolling bearing-like piece comprises an inner ring, an outer ring, a rolling body and a retainer, the outer ring is fixedly connected with the front end cover, and the inner ring is consistent in thickness with the edge of the fan cover and is fixedly connected with the edge of the fan cover.
Preferably: the angle between the outer side surface of the grid and the central axis of the fan cover is 40-58 degrees, the angle between the inner side surface and the central axis is 50-72 degrees, and the included angle of the outer side surface is smaller than that of the inner side surface.
Preferably: the fan cup joints the surface with the output shaft and is equipped with a plurality of recesses, be equipped with a plurality of protruding pieces on the output shaft, the output shaft drives the rotation of fan through the joint of protruding piece and recess.
Preferably: the outer ring is fixedly connected with the front end cover through screws.
Preferably: the radiating fin strips are annular fin strips and are concentric with the rear end cover, and the heights of the radiating fin strips are sequentially increased from outside to inside.
Preferably: and the middle part of the outer side of the rear end cover is provided with a liquid metal radiator.
The invention also provides a heat dissipation method of the motor casing with high-efficiency heat dissipation, which comprises the following steps:
s1, after a motor is electrified and rotates, a fan is driven to rotate through an output shaft;
s2, the fan rotates to enable airflow to flow in front of the fan, and the fan cover and the inner ring freely rotate under the action of the airflow and the grids, so that strong vortex wind appears in the shell;
and S3, the heat in the shell moves in the shell in an accelerating manner under the action of the vortex wind, so that the heat exchange with the shell is improved, one part of the heat is radiated by the heat-conducting silicone grease through the shell, and the other part of the heat is radiated by the rear end cover and the liquid metal radiator on the rear end cover, so that the effect of quickly cooling is achieved.
Compared with the prior art, the invention has the following advantages:
1. through the arrangement of the fan on the inner side of the front end cover, strong wind airflow is generated inside the motor in the operation process of the motor, the heat exchange between the inside and the shell is accelerated, and the heat dissipation efficiency is improved.
2. Through the structure of the fan cover and the arrangement of the grids on the surface, the fan cover can rotate freely under the action of strong wind current of the fan, the driving rotation of the fan and the free rotation of the fan cover are matched with the grids to convert the strong wind current in the motor into strong eddy current, so that the heat exchange between internal heat and the shell is further improved, and the heat dissipation efficiency is improved.
3. The heat on the inner surface of the shell is quickly transferred to the external space through the heat-conducting silicone grease in the shell.
4. The heat dissipation area of the rear end cover is increased through the heat dissipation fin strips of the rear end cover, the heat exchange efficiency is improved, and heat exchanged at the rear end cover is quickly discharged through an external liquid metal radiator.
5. Under the cooperation of the convection heat transfer of the heat exchanger 1 and the convection heat transfer of the heat exchanger 2 and the conduction heat transfer of the heat exchanger 3 and the heat exchanger 4, the whole motor shell has high heat dissipation efficiency.
6. The fan of front end housing can directly cup joint on the output shaft through the recess that sets up, and simple to operate is swift.
7. Through the temperature measurement paper using the working critical temperature point of the motor, when a fault occurs, whether the working temperature of the motor reaches the critical temperature or not is rapidly judged through the observation port, so that the temperature investigation time is greatly saved, the cost is low, the observation is intuitive, and the time is saved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the inner side structure of the rear end cap;
FIG. 3 is a schematic view of the outer side structure of the rear end cap;
FIG. 4 is a schematic view of a fan cover structure;
FIG. 5 is an enlarged view of grid A;
fig. 6 is a schematic view of the front end cover structure with the rolling bearing-like members added.
In the figure: 1. a housing; 11. a viewing port; 2. a front end cover; 3. a rear end cap; 31. radiating fin strips; 32. a liquid metal heat sink; 4. a fan; 41. a groove; 5. a fan cover; 51. a grid; 6. temperature measuring paper; 7. a rolling-bearing-like member; 71. an inner ring; 72. an outer ring; 73. a rolling body; 8. an output shaft; 81. and (4) a convex block.
Detailed Description
The construction and principles of the invention are now fully described with reference to specific embodiments thereof so as to enable one of ordinary skill in the art to fully understand and implement the invention.
Example 1
As shown in fig. 1 to 5: the motor casing with high-efficiency heat dissipation disclosed by the embodiment comprises a cylindrical shell 1 for accommodating a motor, a front end cover 2 and a rear end cover 3; the shell 1 is of a double-layer structure, and heat-conducting silicone grease (the heat-conducting silicone grease takes organic silicone as a main raw material, and materials with excellent heat resistance and heat conductivity are added to the heat-conducting silicone grease, so that the prepared heat-conducting silicone grease-shaped compound is a high-heat-conducting insulating silicone material, and has the advantages of low oil separation, high and low temperature resistance, water resistance, ozone resistance, weather aging resistance and the like; the center of the front end cover 2 is provided with a through hole for the output shaft 8 of the motor to penetrate through, the inner side of the front end cover 2 is rotatably connected with a fan 4 matched with the output shaft 8 of the motor, the fan 4 is driven to rotate by the output shaft 8, the fan 4 is externally provided with a fan cover 5 fixedly connected with the front end cover 2, the surface of the fan cover 5 is provided with a plurality of fan-shaped grids 51 at intervals (the fan cover 5 can protect the fan 4 and prevent a large amount of dust accumulation of the fan on the one hand, and can change the wind direction blown out by the fan on the other hand, the wind blown out can achieve the turbulent flow effect by the angle arrangement of the grids 51, the preferred arrangement is that the angle between the outer side surface of the grids 51 and the central shaft of the fan cover 5 is 40-58 degrees, the angle between the inner side surface and the central shaft is 50-72 degrees, The angles of the inner side surface and the central shaft are 45 degrees and 55 degrees respectively; the rear end cover 3 is composed of a metal heat radiation plate, a plurality of protruding heat radiation fin strips 31 (in the embodiment, the heat radiation fin strips 31 are annular fin strips and are concentric with the rear end cover 3, the height of the heat radiation fin strips 31 is sequentially increased from outside to inside, the heat exchange area between the rear end cover 3 and the inner part of the shell and the external environment can be greatly increased by increasing the heat radiation fin strips 31, heat retention caused by small heat radiation area at the rear end cover 3 is avoided, the heat radiation efficiency is improved, the shape and the height of the heat radiation fin strips 31 are changed, the heat radiation gradient is formed from outside to inside at the rear end cover 3, a certain static flow guiding effect is provided for airflow, the hot airflow at the rear end cover 3 is enabled to be close to the center from the periphery to the center and further radiated outwards, the heat radiation efficiency is further improved, based on the heat radiation fin strips 31, a liquid metal heat radiator 32 is preferably arranged in the middle part of the outer side of the, the heat gathered in the middle of the rear end cover 3 is rapidly diffused outwards through the ultrahigh heat conductivity of the liquid metal radiator 32, so as to achieve an excellent radiating effect, the liquid metal radiator 32 in the embodiment is arranged in the innermost radiating fin strip 31, and the liquid metal radiators 32 can be respectively additionally arranged in interlayers of the adjacent radiating fin strips 31 so as to achieve a more ideal radiating effect); the surface of the shell 1 is provided with an openable observation port 11, the inner surface of the observation port 11 is attached with temperature measuring paper 6, the observation port 11 is a toughened glass port (the temperature measuring paper 6 is attached to the inner side of a motor shell, when the temperature in the motor shell is higher than the temperature of the temperature measuring paper 6, the temperature measuring paper can change color, the temperature measuring paper 6 with a critical temperature value in the motor shell or the temperature measuring paper 6 with a corresponding temperature value is placed according to requirements, when the motor fails and needs to be checked whether the motor is caused by overheating or overburning, the color of the temperature measuring paper 6 can be judged by observing whether the color of the temperature measuring paper 6 changes through the observation port 11, and the checking is rapid and accurate.
Preferably: the surface is cup jointed with output shaft 8 to fan 4 is equipped with a plurality of recesses 41, be equipped with a plurality of protruding pieces 81 on the output shaft 8, output shaft 8 drives fan 4's rotation through the joint of protruding piece 81 and recess 41. So set up when installing front end housing 2, can make fan 4 be connected with the pivot through the cooperation of recess 41 with protruding piece 81, need not plus spare part, simplified structure, convenient assembly.
The embodiment also provides a heat dissipation method of the motor casing with high-efficiency heat dissipation, which comprises the following steps:
s1, after the motor is electrified and rotates, the fan 4 is driven to rotate through the output shaft 8;
s2, the fan 4 rotates to enable airflow to flow in front of the fan 4, and the fan cover 5 and the inner ring 71 freely rotate under the action of the airflow and the grid 51 to enable powerful vortex wind to flow in the shell 1;
and S3, the heat in the shell moves in the shell in an accelerating manner under the action of the vortex wind, so that the heat exchange with the shell is improved, one part of the heat is radiated by the heat-conducting silicone grease through the shell 1, and the other part of the heat is radiated by the rear end cover 3 and the liquid metal radiator 32 on the rear end cover, so that the effect of quickly cooling is achieved.
Example 2
As shown in fig. 6, the present embodiment is modified based on embodiment 1 as follows: the inner side of the front end cover 2 is provided with a rolling bearing part 7, the rolling bearing part 7 comprises an inner ring 71, an outer ring 72, a rolling body 73 and a retainer, the outer ring 72 is fixedly connected with the front end cover 2, and the inner ring 71 is consistent with the edge thickness of the fan cover 5 and is fixedly connected with the same. The inner ring of a common rolling bearing is matched with a shaft and rotates together with the shaft; the outer ring is matched with the bearing seat to play a supporting role; the rolling bodies are uniformly distributed between the inner ring and the outer ring by means of the retainer; the retainer can enable the rolling bodies to be uniformly distributed and guide the rolling bodies to rotate to play a lubricating role. The principle of each part of the rolling bearing-like piece 7 in the embodiment is basically consistent with that of a traditional rolling bearing, and the rolling bearing-like piece is used for free rotation of the fan cover 5, so that the fan cover is unique. The method comprises the following specific steps: in this embodiment, the inner ring 71 is fixedly connected with the fan cover 5, the outer ring 72 is fixed on the front end cover 2, and the fan cover 5 and the inner ring 71 can rotate freely in the outer ring 72 under the cooperation of the rolling bodies 73; through the arrangement, the fan cover 5 can rotate freely by matching the angle of the air flow blown out by the fan 4 with the angle of the grid 51 after the motor is started, the air flow blown out of the grid 51 has a strong vortex effect under the dual rotation of the fan 4 and the fan cover 5, the heat flow in the shell is greatly improved, and the heat exchange efficiency is improved. It should be noted that, in order to eliminate the friction between the inner ring 71 and the front end cap 2 during the rotation, the thickness of the inner ring 71 may be reduced accordingly, or a corresponding recess may be provided on the front end cap 2 for placing the inner ring 71.
Preferably, the outer ring 72 is fixedly connected with the front end cover 2 through screws, so that the rolling bearing-like member 7 is convenient to mount and replace.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any manner. Those skilled in the art can make many possible variations and modifications to the technical solution of the present invention using the methods disclosed above, or modify equivalent embodiments with equivalent variations, without departing from the technical principle and scope of the invention. Therefore, any combination, modification or substitution of the technical features disclosed in the present invention according to the technical essence of the present invention should fall within the protection scope of the technical solution of the present invention, unless the principle or the solution of the present invention is departed from.
Claims (8)
1. A motor casing with high-efficiency heat dissipation comprises a cylindrical shell (1) for accommodating a motor, a front end cover (2) and a rear end cover (3); the heat-conducting silicone grease heat-conducting shell is characterized in that the shell (1) is of a double-layer structure, and heat-conducting silicone grease is filled inside the shell; a through hole for a motor output shaft (8) to penetrate through is formed in the center of the front end cover (2), a fan (4) matched with the motor output shaft (8) is connected to the inner side of the front end cover (2) in a rotating mode, the fan (4) is driven to rotate through the output shaft (8), a fan cover (5) fixedly connected with the front end cover (2) is arranged outside the fan (4), and a plurality of fan-shaped grids (51) are arranged on the surface of the fan cover (5) at intervals; the rear end cover (3) is composed of a metal radiating plate, and a plurality of protruding radiating fin strips (31) are arranged on two sides of the rear end cover; an openable observation port (11) is formed in the surface of the shell (1), temperature measurement paper (6) is attached to the inner surface of the observation port (11), and the observation port (11) is a toughened glass port.
2. The motor casing with high heat dissipation efficiency as recited in claim 1, wherein a rolling bearing-like member (7) is disposed inside the front end cover (2), the rolling bearing-like member (7) comprises an inner ring (71), an outer ring (72), rolling bodies (73) and a retainer, the outer ring (72) is fixedly connected with the front end cover (2), and the inner ring (71) is fixedly connected with the edge of the fan cover (5) in a consistent thickness.
3. The motor casing with efficient heat dissipation according to claim 1, wherein the angle between the outer side surface of the grid (51) and the central axis of the fan cover (5) is 40-58 degrees, the angle between the inner side surface and the central axis is 50-72 degrees, and the included angle between the outer side surface and the inner side surface is smaller than that between the inner side surface and the central axis.
4. The motor casing with the efficient heat dissipation function as claimed in claim 1, wherein a plurality of grooves (41) are formed in the sleeving surfaces of the fan (4) and the output shaft (8), a plurality of protruding blocks (81) are arranged on the output shaft (8), and the output shaft (8) drives the fan (4) to rotate through the clamping connection of the protruding blocks (81) and the grooves (41).
5. A high efficiency heat dissipating motor casing as claimed in claim 2, wherein the outer ring (72) is fixedly connected to the front cover (2) by screws.
6. The motor casing with high heat dissipation efficiency as recited in claim 2, wherein the heat dissipation fin strips (31) are annular fin strips and are concentric with the rear end cover (3), and the heights of the heat dissipation fin strips (31) are sequentially increased from outside to inside.
7. An efficient heat-dissipation motor casing as claimed in claim 6, wherein the liquid metal radiator (32) is arranged in the middle of the outer side of the rear end cover (3).
8. The method for dissipating heat from a motor casing with high efficiency as recited in claim 7, comprising the steps of:
s1, after a motor is electrified and rotates, a fan (4) is driven to rotate through an output shaft (8);
s2, the fan (4) rotates to enable airflow to flow in front of the fan (4), and under the action of the airflow and the grids (51), the fan cover (5) and the inner ring (71) freely rotate to enable powerful vortex air to flow in the shell (1);
s3, the heat in the shell moves in an accelerating manner in the shell under the action of the vortex wind, so that the heat exchange with the shell is improved, one part of the heat is dissipated by the heat-conducting silicone grease through the shell (1), the other part of the heat is dissipated through the rear end cover (3) and the liquid metal radiator (32) on the rear end cover, and the effect of quickly cooling is achieved.
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CN201911032801.5A CN110957838A (en) | 2019-10-28 | 2019-10-28 | Motor casing capable of efficiently dissipating heat and heat dissipation method thereof |
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Cited By (1)
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CN113224909A (en) * | 2021-03-04 | 2021-08-06 | 张远 | Driving motor for airflow flowing through heat dissipation unit |
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