CN110768464A - Motor cooling device and motor cooling method - Google Patents
Motor cooling device and motor cooling method Download PDFInfo
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- CN110768464A CN110768464A CN201810837918.XA CN201810837918A CN110768464A CN 110768464 A CN110768464 A CN 110768464A CN 201810837918 A CN201810837918 A CN 201810837918A CN 110768464 A CN110768464 A CN 110768464A
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- 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
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- 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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- Motor Or Generator Cooling System (AREA)
Abstract
The invention provides a motor cooling device and a motor cooling method, the motor cooling device includes: the cooling cover, the inner cooling core, the outer cooling core, the circulating impeller, the inner fan and the outer fan; the cooling cover is communicated with the shell of the motor, the inner cooling core is arranged in the cooling cover, and the outer cooling core is arranged outside the cooling cover; the inner fan and the outer fan are both arranged on a rotating shaft of the motor, wherein the inner fan is positioned in a shell of the motor, and the outer fan is positioned outside the shell of the motor; the inner fan is used for driving the air flow in the motor shell to pass through the stator and the rotor of the motor, enter the cooling cover and return to the shell of the motor after passing through the inner cooling core in the cooling cover; the circulating impeller is used for driving the cooling liquid contained in the inner cooling core and the outer cooling core so that the cooling liquid circulates between the inner cooling core and the outer cooling core; and the outer fan is used for cooling the cooling liquid in the outer cooling core. The scheme can realize motor cooling without connecting external cooling water.
Description
Technical Field
The invention relates to the technical field of electrical engineering, in particular to a motor cooling device and a motor cooling method.
Background
The motor is a device for converting electric energy into mechanical energy, and is used as a power source of various machines. The motor can generate heat in the working process, if the heat generated by the motor can not be dissipated in time, the motor can work abnormally or even be burnt due to overheating, and therefore the motor needs to be cooled.
At present, a high-power motor is usually cooled by a water-cooled cooling mode, namely, a fan and a water cooler are arranged inside the motor, and air flow can sequentially pass through a motor heating component and the water cooler under the action of the fan so as to transmit heat generated by the motor to cooling water in the water cooler, thereby achieving the purpose of cooling the motor.
Aiming at the current cooling mode of the high-power motor, the water cooler needs to be connected with external cooling water through a pipeline so as to continuously provide cooling water for the water cooler through equipment such as a water pump. Since the water cooler needs to be connected with external cooling water, the motor cooling method has high requirements on the installation environment, and the applicability of the motor cooling method is poor.
Disclosure of Invention
According to the motor cooling device and the motor cooling method provided by the embodiment of the invention, external cooling water is not required to be connected.
The embodiment of the invention provides a motor cooling device, which comprises: the cooling cover, the inner cooling core, the outer cooling core, the circulating impeller, the inner fan and the outer fan;
the cooling cover is communicated with a shell of the motor, the inner cooling core is arranged in the cooling cover, and the outer cooling core is arranged outside the cooling cover;
the inner fan and the outer fan are both arranged on a rotating shaft of the motor, wherein the inner fan is positioned in a shell of the motor, and the outer fan is positioned outside the shell of the motor;
the inner fan is used for driving the air flow in the motor shell to pass through the stator and the rotor of the motor, enter the cooling cover and return to the shell of the motor after passing through the inner cooling core in the cooling cover;
the circulating impeller is used for driving the cooling liquid contained in the inner cooling core and the outer cooling core so that the cooling liquid circulates between the inner cooling core and the outer cooling core;
the outer fan is used for cooling the cooling liquid in the outer cooling core.
Preferably, the first and second electrodes are formed of a metal,
the inner cooling core is communicated with the outer cooling core through a hot liquid conveying pipe and a cold liquid conveying pipe, and the circulating impeller is arranged on the cold liquid conveying pipe;
the total volume of the cooling liquid contained in the inner cooling core and the outer cooling core is larger than the volume of the inner cooling core;
the hot liquid conveying pipe is used for conveying the cooling liquid in the inner cooling core to the outer cooling core under the driving of the circulating impeller;
the cooling liquid conveying pipe is used for conveying the cooling liquid in the outer cooling core to the inner cooling core under the driving of the circulating impeller.
Preferably, the first and second electrodes are formed of a metal,
the cooling liquid includes: water, anhydrous coolant or cooling oil.
Preferably, the first and second electrodes are formed of a metal,
the cooling cover is arranged above the motor;
the bottom of the cooling cover is provided with an air inlet and an air outlet which are communicated with the motor shell, wherein the air inlet and the air outlet are respectively positioned above two end parts of a stator of the motor;
the air inlet is used for guiding airflow passing through a stator and a rotor of the motor into the cooling cover;
and the air outlet is used for guiding the airflow passing through the inner cooling core into the shell of the motor.
Preferably, the first and second electrodes are formed of a metal,
the inner fan is arranged below the air inlet, and the inner fan and the outer fan are respectively positioned on two sides of a rotor of the motor.
Preferably, the first and second electrodes are formed of a metal,
at least one first heat dissipation rib plate is arranged on the outer surface of the inner cooling core, wherein the first heat dissipation rib plate is parallel to a rotating shaft of the motor.
Preferably, the first and second electrodes are formed of a metal,
the middle part of the outer cooling core is provided with a through hole through which a rotating shaft of the motor can pass;
after the rotating shaft of the motor penetrates through the through hole, the outer cooling core is arranged between the outer fan and the shell of the motor.
Preferably, the first and second electrodes are formed of a metal,
at least one second heat dissipation rib plate is arranged on the outer surface of the outer cooling core, and the second heat dissipation rib plates are arranged in the horizontal direction.
Preferably, the first and second electrodes are formed of a metal,
the motor cooling device further includes: a protective cover;
the protective cover is of a net structure;
the protective cover is respectively connected with the cooling cover and the shell of the motor, so that the outer cooling core and the outer fan are positioned in the protective cover.
Preferably, the first and second electrodes are formed of a metal,
the motor cooling device further includes: an additional cooling core;
the additional cooling core is positioned inside a shell of the motor;
the additional cooling core is respectively connected with the inner cooling core and the outer cooling core;
the circulating impeller is used for driving the cooling liquid to circulate according to the flow path of the outer cooling core, the inner cooling core, the additional cooling core and the outer cooling core.
The embodiment of the invention also provides a motor cooling method based on any one of the motor cooling devices, which comprises the following steps:
driving an air flow through a stator and a rotor of the motor by using the inner fan, so that the air flow absorbs heat generated by the stator and the rotor of the motor;
driving the air flow subjected to heat absorption into the cooling cover by using the inner fan, and enabling the air flow to pass through the inner cooling core, so that the air flow transfers heat to cooling liquid in the inner cooling core;
driving the air flow subjected to heat release into a shell of the motor by using the inner fan;
outputting the cooling liquid absorbing heat in the inner cooling core to the outer cooling core through the circulating impeller, and transferring the cooling liquid in the outer cooling core to the inner cooling core;
and cooling the cooling liquid in the outer cooling core by the outer fan.
When the motor runs, the inner fan arranged on the rotating shaft of the motor drives the airflow in the motor shell to pass through the stator and the rotor of the motor and then enter the cooling cover, the airflow entering the cooling cover passes through the inner cooling core under the driving of the inner fan and exchanges heat with the cooling liquid in the inner cooling core, and then returns to the shell of the motor, meanwhile, the circulating impeller drives the cooling liquid to circulate between the inner cooling core and the outer cooling core, and after the cooling liquid absorbing heat in the inner cooling core enters the outer cooling core, the outer fan cools the cooling liquid in the outer cooling core under the driving of the motor. Therefore, under the action of the inner fan, airflow can circulate between the motor shell and the cooling cover, heat generated by the motor is transferred to cooling liquid in the inner cooling core, the cooling liquid can circulate between the inner cooling core and the outer cooling core under the action of the circulating impeller, heat absorbed by the cooling liquid is dissipated to the outside of the motor, the cooling liquid is recycled by the circulating impeller and the outer fan in the cooling process of the motor, and therefore the requirement on the installation environment can be lowered.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a cooling apparatus for an electric machine according to an embodiment of the present invention;
FIG. 2 is a schematic view of another motor cooling arrangement provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of yet another motor cooling apparatus provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of yet another motor cooling arrangement provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a motor cooling arrangement including a protective cover according to one embodiment of the present invention;
FIG. 6 is a schematic diagram of a motor cooling apparatus including an additional cooling core according to one embodiment of the present invention;
fig. 7 is a flowchart of a method for cooling a motor according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a cooling apparatus for a motor, including: the cooling jacket 10, the inner cooling core 20, the outer cooling core 30, the circulation impeller 40, the inner fan 50, and the outer fan 60;
the cooling cover 10 is communicated with the housing of the motor 100, and the inner cooling core 20 is disposed inside the cooling cover 10, and the outer cooling core 30 is disposed outside the cooling cover 10;
the inner fan 50 and the outer fan 60 are both arranged on a rotating shaft of the motor 100, wherein the inner fan 50 is positioned in a shell of the motor 100, and the outer fan 60 is positioned outside the shell of the motor 100;
an inner fan 50 for driving an air flow in the housing of the motor 100 into the cooling cover 10 after passing through the stator and the rotor of the motor 100, and returning to the housing of the motor 100 after passing through the inner cooling core 20 in the cooling cover 10;
a circulation impeller 40 for driving the cooling liquid contained in the inner cooling core 20 and the outer cooling core 30 such that the cooling liquid circulates between the inner cooling core 20 and the outer cooling core 30;
and an outer fan 60 for cooling the cooling liquid in the outer cooling core 30.
According to the motor cooling device provided by the embodiment of the invention, when the motor runs, the inner fan arranged on the rotating shaft of the motor drives the airflow in the motor shell to pass through the stator and the rotor of the motor and then enter the cooling cover, the airflow entering the cooling cover passes through the inner cooling core under the driving of the inner fan to exchange heat with the cooling liquid in the inner cooling core and then returns to the shell of the motor, meanwhile, the circulating impeller drives the cooling liquid to circulate between the inner cooling core and the outer cooling core, and after the cooling liquid absorbing heat in the inner cooling core enters the outer cooling core, the outer fan is driven by the motor to cool the cooling liquid in the outer cooling core. Therefore, under the action of the inner fan, airflow can circulate between the motor shell and the cooling cover, heat generated by the motor is transferred to cooling liquid in the inner cooling core, the cooling liquid can circulate between the inner cooling core and the outer cooling core under the action of the circulating impeller, heat absorbed by the cooling liquid is dissipated to the outside of the motor, the cooling liquid is recycled by the circulating impeller and the outer fan in the cooling process of the motor, and therefore the requirement on the installation environment can be lowered.
Alternatively, on the basis of the motor cooling device shown in fig. 1, as shown in fig. 2, the inner cooling core 20 is communicated with the outer cooling core 30 through a hot liquid transfer pipe 701 and a cold liquid transfer pipe 702, wherein the circulation impeller 40 is arranged on the cold liquid transfer pipe 702, and the total volume of the cooling liquid contained in the inner cooling core 20 and the outer cooling core 30 is larger than the volume of the inner cooling core 20;
the hot liquid transfer pipe 701 can transfer the cooling liquid in the inner cooling core 20 to the outer cooling core 30 under the driving of the circulating impeller 40;
the cold fluid transfer tube 702 may transfer the cooling fluid inside the outer cooling core 30 into the inner cooling core 20 under the driving of the circulation impeller 40.
Firstly, the inner cooling core and the outer cooling core are communicated through the hot liquid transmission pipe and the cold liquid transmission pipe to form a cooling liquid circulation passage, so that the cooling liquid can circulate between the inner cooling core and the outer cooling core under the driving of the circulation impeller, and the motor can be continuously cooled in the working process of the motor.
Secondly, the circulating impeller is arranged on the cold liquid transmission pipe, the circulating impeller extracts low-temperature cooling liquid from the outer cooling core and pushes the extracted low-temperature cooling liquid into the inner cooling core, and at the moment, high-temperature cooling liquid in the inner cooling core can enter the outer cooling core under the pushing of the low-temperature cooling liquid. When arranging interior cooling core and outer cooling core, the height that highly is greater than outer cooling core of interior cooling core usually, set up the impeller that circulates on the cold liquid transmission pipe this moment, the impeller that circulates only need extract the coolant liquid and push in the interior cooling core from outer cooling core, and the coolant liquid in the interior cooling core can rely on gravity to get into outer cooling core to the impeller that circulates of less power alright guarantee the normal cycle of coolant liquid, guarantee to carry out refrigerated consumption lower to the motor.
Secondly, the total volume of the cooling liquid contained in the inner cooling core and the outer cooling core needs to be larger than the volume of the inner cooling core, the inner cooling core can be fully filled with the cooling liquid, the degree of heat exchange between the air flow flowing through the inner cooling core and the cooling liquid in the inner cooling core can be improved, and therefore the effect of cooling the motor can be improved. In addition, in order to reduce the power consumption of the circulating impeller, the inner cooling core and the outer cooling core can be filled with cooling liquid, so that the circulating impeller only needs to provide power to enable the cooling liquid to circulate between the inner cooling core and the outer cooling core, and the power does not need to be provided to lift the cooling liquid.
Alternatively, on the basis of the motor cooling apparatus shown in fig. 1, the cooling liquid contained in the inner cooling core 20 and the outer cooling core 30 may be water, water-free cooling liquid, or cooling oil.
The different types of cooling liquids have different cooling effects and different costs, and the corresponding types of cooling liquids can be flexibly selected according to the heat production condition of the motor in the actual service implementation process, so that the cooling liquid with lower use cost is used on the premise of meeting the cooling requirement, and the motor is guaranteed to be cooled with lower cost.
Alternatively, on the basis of the motor cooling device shown in fig. 1, as shown in fig. 3, the cooling cover 10 is disposed above the motor 100, and the bottom of the cooling cover 10 is provided with an air inlet 101 and an air outlet 102 communicated with the housing of the motor 100, wherein the air inlet 101 and the air outlet 102 are respectively located above two end portions of the stator 1002 of the motor 100;
the air inlet 101 is used to introduce an air flow passing through the rotor 1001 and the stator 1002 of the motor 100 into the cooling cover 10;
the air outlet 102 serves to guide the air flow passing through the inner cooling core 20 into the housing of the motor 100.
Firstly, because the density of hot-air is less than the density of cold-air, with the top of cooling cover setting at the motor to set up air inlet and gas outlet in the bottom of cooling cover, make the air current after absorbing the produced heat of motor get into the cooling cover more easily, help promoting and carry out refrigerated effect to the motor.
Secondly, the air inlet and the air outlet of the cooling cover are respectively arranged above two end parts of the motor stator, under the action of the inner fan, the air flow in the motor shell can pass through the motor rotor and the stator and then move upwards so as to enter the cooling cover, and correspondingly, the air flow in the cooling cover can pass through the rotor and the stator of the motor along the rotating shaft direction of the motor after entering the motor shell from the air outlet. Like this, the air current that guarantees to pass electric motor rotor and stator on the one hand can be as much as possible get into the cooling jacket, promotes the air current and carries out the efficiency of heat exchange with interior cooling core, and on the other hand can make the air current in the motor casing and in the cooling jacket more steady and smooth and easy, can reduce the noise of motor when guaranteeing the cooling effect.
Alternatively, as shown in fig. 3, the inner fan 50 may be disposed below the air inlet 101, and the inner fan 50 and the outer fan 60 are respectively located at both sides of the rotor 1001 of the motor 100.
With interior fan setting in the below of air inlet, when the motor when using, the motor drives interior fan and rotates, and interior fan passes through the air inlet and can directly blows in the cooling cover with the air in the motor casing for the air current is more smooth and easy when circulating between cooling cover and motor casing, can reduce the produced noise of interior fan when reducing interior fan consumption.
Inner fan and outer fan all set up in the pivot of motor, and inner fan and outer fan are located electric motor rotor's both sides respectively, and when the motor drove inner fan and outer fan and rotated like this, can be so that electric motor shaft's atress is more balanced.
Alternatively, on the basis of the motor cooling device shown in fig. 3, as shown in fig. 4, at least one first heat dissipation rib 201 is disposed on the outer surface of the inner cooling core 20, and the first heat dissipation rib 201 is parallel to the rotating shaft of the motor 100.
The upper and lower surface of the inner cooling core is provided with the first heat dissipation rib plates, so that the contact area between the inner cooling core and the air flow can be increased, the heat exchange efficiency of the air flow and the inner cooling core can be improved on the premise that the air flow speed is constant, the air flow has lower temperature after flowing through the inner cooling core, and the effect of cooling the motor is further improved.
The first heat dissipation rib plates arranged on the outer surface of the inner cooling core are parallel to the rotating shaft of the motor, the air inlet and the air outlet arranged on the cooling cover are respectively positioned above two end parts of the motor stator, namely, the connecting line of the air inlet and the air outlet is also parallel to the rotating shaft of the motor, so that the first heat dissipation rib plates can play a role in guiding flow, the air flow entering from the air inlet can flow to the air outlet along the direction parallel to the rotating shaft of the motor, and the air flow in the cooling cover is more stable.
In the motor cooling device shown in fig. 4, the top plate and the front plate of the cooling cover are not shown in order to clearly reflect the structure inside the cooling cover.
Alternatively, in the motor cooling apparatus shown in fig. 1, as shown in fig. 4, a through hole is formed in the middle of the outer cooling core 30, and after the rotating shaft of the motor 100 passes through the through hole, the outer cooling core 30 is disposed between the outer fan 60 and the housing of the motor 100.
Through setting up the through-hole in the middle part of cooling core outside, after making the pivot of motor pass this through-hole, will cool off the core outward and set up between motor casing and outer fan, when the motor operation drove outer fan and rotates, outer fan accelerated outer cooling core around the flow velocity of air to cool off the coolant liquid in the outer cooling core. Set up outer cooling core between outer fan and motor casing, can reduce whole motor cooling device's volume on the one hand, reduce motor cooling device to arranging the requirement of environment, on the other hand can guarantee that outer fan air inlet one side does not receive sheltering from, promotes outer fan and carries out refrigerated effect to outer cooling core.
Optionally, as shown in fig. 4, one or more second heat sink ribs 301 are disposed on the outer surface of the outer cooling core 30, and the second heat sink ribs 301 are arranged in a horizontal direction.
The second heat dissipation rib plate is arranged on the outer surface of the outer cooling core, so that the contact area between the outer cooling core and air can be increased, the heat dissipation effect of the outer cooling core is improved, and the purpose of cooling the cooling liquid in the outer cooling core as soon as possible is achieved. The second heat dissipation rib plates are arranged in the horizontal direction, hot air blown by the outer fan to the outer cooling core can be guided to the two sides of the outer cooling core along the horizontal direction, and the influence on the heat dissipation effect of the motor caused by the fact that the hot air blown by the outer cooling core stays around the motor is avoided.
Alternatively, on the basis of the motor cooling device shown in fig. 4, as shown in fig. 5, the motor cooling device may further include: a protective cover 80;
the protective cover 80 has a mesh structure, and the protective cover 80 is connected to the cooling cover 10 and the housing of the motor 100, respectively, such that the outer cooling core 30 and the outer fan 60 are located inside the protective cover 80.
The protection casing with network structure is connected with the casing of cooling cover and motor for external cooling core and outer fan all are located the protection casing, can prevent on the one hand that personnel from missing touching external cooling core or outer fan and cause scald or machinery and cut the wound, guarantee this motor cooling device's security, and on the other hand makes the air can freely pass in and out the protection casing, guarantees that the external cooling core can normally dispel the heat.
Optionally, on the basis of the motor cooling device provided in each of the above embodiments, as shown in fig. 6, the motor cooling device may further include: an additional cooling core 90;
the additional cooling core 90 is disposed inside the casing of the motor 100, and the additional cooling core 90 is connected to the inner cooling core 20 and the outer cooling core 30, respectively;
the cooling fluid contained in the inner cooling core 20, the outer cooling core 30 and the additional cooling core 90 may be circulated along the flow path of the outer cooling core 30, the inner cooling core 20, the additional cooling core 90 and the outer cooling core 30 by the driving of the circulation impeller 40.
When the power of motor is great, when can not satisfy the cooling demand of motor through interior cooling core and outer cooling core, can set up additional cooling core in the casing inside of motor, additional cooling core is connected with interior cooling core and outer cooling core respectively and is constituted the route of coolant liquid, the coolant liquid can get into interior cooling core and return outer cooling core after the additional cooling core flows out from outer cooling core in proper order, except that interior cooling core can carry out the heat exchange with the air current in the cooling cover like this, additional cooling core can also carry out the heat exchange with the air current in the casing of motor, promote the efficiency that the coolant liquid carries out the heat exchange with the inside air current of motor, in order to satisfy and carry out refrigerated demand to the motor.
It should be noted that, in the motor cooling device provided in each of the above embodiments, the inner cooling core may include a plurality of cooling core units, and the cooling core units are connected in series or in parallel with each other.
As shown in fig. 7, an embodiment of the present invention provides a motor cooling method based on the motor cooling device provided in any one of the above embodiments, where the method may include the following steps:
step 701: driving an air flow through the stator and rotor of the motor 100 by the inner fan 50, so that the air flow absorbs heat generated by the stator and rotor of the motor 100;
step 702: driving the heat-absorbed air flow into the cooling cover 10 by the inner fan 50 and passing the air flow through the inner cooling core 20 so that the air flow transfers heat to the cooling liquid in the inner cooling core 20;
step 703: the inner fan 50 is used for driving the air flow after heat release to enter the shell of the motor 100;
step 704: outputting the coolant absorbing heat in the inner cooling core 20 to the outer cooling core 30 by the circulation impeller 40, and transferring the coolant in the outer cooling core 30 to the inner cooling core 20;
step 705: the cooling liquid in the outer cooling core 30 is cooled by the outer fan 60.
According to the motor cooling method provided by the embodiment of the invention, in the operation process of the motor, the inner fan drives the airflow to pass through the rotor and the stator of the motor, the airflow can absorb heat generated by the stator and the rotor of the motor to be changed into high-temperature airflow, then the inner fan pushes the high-temperature airflow into the cooling cover, the high-temperature airflow can exchange heat with cooling liquid in the inner cooling core to be changed into low-temperature airflow when flowing through the inner cooling core in the cooling cover, and then the low-temperature airflow returns to the interior of the motor shell through the inner fan, so that the airflow can flow through the stator and the rotor of the motor again to realize airflow circulation. Correspondingly, the cooling liquid in the inner cooling core and the high-temperature air flow can become high-temperature cooling liquid after heat exchange, the high-temperature cooling liquid can be conveyed to the outer cooling core through the circulating impeller, then the high-temperature cooling liquid in the outer cooling core is cooled through the outer fan to obtain low-temperature cooling liquid, and the low-temperature cooling liquid can be conveyed to the inner cooling core through the circulating impeller to absorb heat again. The cooling device has the advantages that the inner fan is utilized to circulate air flow inside the cooling cover and the motor, the circulating impeller is utilized to circulate cooling liquid in the inner cooling core and the outer cooling core, heat generated by the motor is dissipated to the outside of the motor through heat exchange between the air flow and the cooling liquid, cooling of the motor is realized, the cooling liquid circularly flows in the inner cooling core and the outer cooling core, external cooling water does not need to be connected in the cooling process of the motor, and accordingly the requirement of the motor cooling device on the installation environment can be reduced.
The motor cooling device and the motor cooling method provided by the invention at least have the following beneficial effects:
1. in the motor cooling device and the motor cooling method provided by the invention, when the motor runs, the inner fan arranged on the rotating shaft of the motor drives the airflow in the motor shell to pass through the stator and the rotor of the motor and then enter the cooling cover, the airflow entering the cooling cover passes through the inner cooling core under the driving of the inner fan to exchange heat with the cooling liquid in the inner cooling core and then returns to the shell of the motor, meanwhile, the circulating impeller drives the cooling liquid to circulate between the inner cooling core and the outer cooling core, and after the cooling liquid absorbing heat in the inner cooling core enters the outer cooling core, the outer fan cools the cooling liquid in the outer cooling core under the driving of the motor. Therefore, under the action of the inner fan, airflow can circulate between the motor shell and the cooling cover, heat generated by the motor is transferred to cooling liquid in the inner cooling core, the cooling liquid can circulate between the inner cooling core and the outer cooling core under the action of the circulating impeller, heat absorbed by the cooling liquid is dissipated to the outside of the motor, the cooling liquid is recycled by the circulating impeller and the outer fan in the cooling process of the motor, and therefore the requirement on the installation environment can be lowered.
2. In the motor cooling device and the motor cooling method provided by the invention, the total volume of the cooling liquid contained in the inner cooling core and the outer cooling core needs to be larger than the volume of the inner cooling core, so that the inner cooling core can be filled with the cooling liquid, the degree of heat exchange between the air flow flowing through the inner cooling core and the cooling liquid in the inner cooling core can be further improved, and the effect of cooling the motor can be further improved. In addition, in order to reduce the power consumption of the circulating impeller, the inner cooling core and the outer cooling core can be filled with cooling liquid, so that the circulating impeller only needs to provide power to enable the cooling liquid to circulate between the inner cooling core and the outer cooling core, and the power does not need to be provided to lift the cooling liquid.
3. In the motor cooling device and the motor cooling method provided by the invention, because the density of the hot air is smaller than that of the cold air, the cooling cover is arranged above the motor, and the air inlet and the air outlet are arranged at the bottom of the cooling cover, so that the air flow absorbing the heat generated by the motor can more easily enter the cooling cover, and the effect of cooling the motor is improved.
4. In the motor cooling device and the motor cooling method provided by the invention, the air inlet and the air outlet of the cooling cover are respectively arranged above the two end parts of the motor stator, the airflow in the motor shell can enter the cooling cover after passing through the motor rotor and the motor stator and moving upwards under the action of the inner fan, and correspondingly, the airflow in the cooling cover can pass through the rotor and the stator of the motor along the rotating shaft direction of the motor after entering the motor shell from the air outlet. Like this, the air current that guarantees to pass electric motor rotor and stator on the one hand can be as much as possible get into the cooling jacket, promotes the air current and carries out the efficiency of heat exchange with interior cooling core, and on the other hand can make the air current in the motor casing and in the cooling jacket more steady and smooth and easy, can reduce the noise of motor when guaranteeing the cooling effect.
5. In the motor cooling device and the motor cooling method provided by the invention, the inner fan is arranged below the air inlet, when the motor is in use, the motor drives the inner fan to rotate, the inner fan can directly blow air in the motor shell into the cooling cover through the air inlet, so that air flow is smoother when circulating between the cooling cover and the motor shell, and the noise generated by the inner fan can be reduced while the power consumption of the inner fan is reduced.
6. According to the motor cooling device and the motor cooling method provided by the invention, the first heat dissipation rib plates are arranged on the upper surface and the lower surface of the inner cooling core, so that the contact area between the inner cooling core and the airflow can be increased, the heat exchange efficiency between the airflow and the inner cooling core can be improved on the premise of a certain airflow speed, the airflow has a lower temperature after flowing through the inner cooling core, and the motor cooling effect is further improved.
7. In the motor cooling device and the motor cooling method provided by the invention, the first heat dissipation rib plates arranged on the outer surface of the inner cooling core are parallel to the rotating shaft of the motor, the air inlet and the air outlet arranged on the cooling cover are respectively positioned above the two end parts of the motor stator, namely, the connecting line of the air inlet and the air outlet is also parallel to the rotating shaft of the motor, so that the first heat dissipation rib plates can play a role in guiding, the airflow entering from the air inlet can flow to the air outlet along the direction parallel to the rotating shaft of the motor, and the airflow in the cooling cover is more stable.
8. In the motor cooling device and the motor cooling method provided by the invention, the outer cooling core is arranged between the outer fan and the motor shell, so that on one hand, the volume of the whole motor cooling device can be reduced, the requirement of the motor cooling device on the arrangement environment is reduced, on the other hand, the air inlet side of the outer fan can be ensured not to be shielded, and the effect of cooling the outer cooling core by the outer fan is improved.
9. In the motor cooling device and the motor cooling method provided by the invention, the second heat dissipation rib plate is arranged on the outer surface of the outer cooling core, so that the contact area between the outer cooling core and air can be increased, the heat dissipation effect of the outer cooling core is improved, and the aim of cooling the cooling liquid in the outer cooling core as soon as possible is fulfilled. The second heat dissipation rib plates are arranged in the horizontal direction, hot air blown by the outer fan to the outer cooling core can be guided to the two sides of the outer cooling core along the horizontal direction, and the influence on the heat dissipation effect of the motor caused by the fact that the hot air blown by the outer cooling core stays around the motor is avoided.
10. In the motor cooling device and the motor cooling method provided by the invention, when the power of the motor is higher and the cooling requirement of the motor cannot be met through the inner cooling core and the outer cooling core, the additional cooling core can be arranged in the shell of the motor and respectively connected with the inner cooling core and the outer cooling core to form a cooling liquid passage, and the cooling liquid flows out of the outer cooling core and then sequentially enters the inner cooling core and the additional cooling core and then returns to the outer cooling core, so that the inner cooling core can exchange heat with air flow in the cooling cover, the additional cooling core can exchange heat with the air flow in the shell of the motor, the efficiency of exchanging heat between the cooling liquid and the air flow in the motor is improved, and the requirement of cooling the motor is satisfied.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
Finally, it is to be noted that: the above description is only a preferred embodiment of the present invention, and is only used to illustrate the technical solutions of the present invention, and not to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (11)
1. Motor cooling device, its characterized in that includes: a cooling cover (10), an inner cooling core (20), an outer cooling core (30), a circulating impeller (40), an inner fan (50) and an outer fan (60);
the cooling cover (10) is communicated with a shell of the motor (100), the inner cooling core (20) is arranged in the cooling cover (10), and the outer cooling core (30) is arranged outside the cooling cover (10);
the inner fan (50) and the outer fan (60) are both arranged on a rotating shaft of the motor (100), wherein the inner fan (50) is positioned in a shell of the motor (100), and the outer fan (60) is positioned outside the shell of the motor (100);
the inner fan (50) is used for driving the air flow in the shell of the motor (100) to pass through the stator and the rotor of the motor (100) and enter the cooling cover (10), and return to the shell of the motor (100) after passing through the inner cooling core (20) in the cooling cover (10);
the circulating impeller (40) is used for driving the cooling liquid contained in the inner cooling core (20) and the outer cooling core (30) so that the cooling liquid circulates between the inner cooling core (20) and the outer cooling core (30);
the outer fan (60) is used for cooling the cooling liquid in the outer cooling core (30).
2. The apparatus of claim 1,
the inner cooling core (20) is communicated with the outer cooling core (30) through a hot liquid delivery pipe (701) and a cold liquid delivery pipe (702), and the circulating impeller (40) is arranged on the cold liquid delivery pipe (702);
the total volume of the cooling liquid contained in the inner cooling core (20) and the outer cooling core (30) is larger than the volume of the inner cooling core (20);
the hot liquid delivery pipe (701) is used for delivering the cooling liquid in the inner cooling core (20) into the outer cooling core (30) under the driving of the circulating impeller (40);
the cold liquid conveying pipe (702) is used for conveying the cold liquid in the outer cooling core (30) to the inner cooling core (20) under the driving of the circulating impeller (40).
3. The apparatus of claim 1,
the cooling liquid includes: water, anhydrous coolant or cooling oil.
4. The apparatus of claim 1,
the cooling cover (10) is arranged above the motor (100);
an air inlet (101) and an air outlet (102) communicated with a shell of the motor (100) are formed in the bottom of the cooling cover (10), wherein the air inlet (101) and the air outlet (102) are respectively positioned above two end parts of a stator (1002) of the motor (100);
the air inlet (101) is used for guiding air flow passing through a stator (1002) and a rotor (1001) of the motor (100) into the cooling cover (10);
the air outlet (102) is used for guiding the air flow passing through the inner cooling core (20) into the shell of the motor (100).
5. The apparatus of claim 4,
the inner fan (50) is disposed below the air inlet (101), and the inner fan (50) and the outer fan (60) are respectively located on both sides of a rotor (1001) of the motor (100).
6. The apparatus of claim 4,
at least one first heat dissipation rib plate (201) is arranged on the outer surface of the inner cooling core (20), wherein the first heat dissipation rib plate (201) is parallel to the rotating shaft of the motor (100).
7. The apparatus of claim 1,
the middle part of the outer cooling core (30) is provided with a through hole through which a rotating shaft of the motor (100) can pass;
after the rotating shaft of the motor (100) passes through the through hole, the outer cooling core (30) is arranged between the outer fan (60) and the shell of the motor (100).
8. The apparatus of claim 7,
at least one second heat dissipation rib plate (301) is arranged on the outer surface of the outer cooling core (30), and the second heat dissipation rib plates (301) are arranged in the horizontal direction.
9. The apparatus of claim 7, further comprising: a protective cover (80);
the protective cover (80) is of a net structure;
the protective cover (80) is respectively connected with the cooling cover (10) and the shell of the motor (100), so that the outer cooling core (30) and the outer fan (60) are positioned in the protective cover (80).
10. The apparatus of any of claims 1 to 9, further comprising: an additional cooling core (90);
the additional cooling core (90) is located inside a housing of the electric machine (100);
the additional cooling core (90) is respectively connected with the inner cooling core (20) and the outer cooling core (30);
the circulating impeller (40) is used for driving the cooling liquid to circulate according to the flow path of the outer cooling core (30), the inner cooling core (20), the additional cooling core (90) and the outer cooling core (30).
11. A motor cooling method based on the motor cooling apparatus according to any one of claims 1 to 10, comprising:
driving an air flow through a stator and a rotor of the motor (100) with the inner fan (50) such that the air flow absorbs heat (701) generated by the stator and the rotor of the motor (100);
driving the heat-absorbed air flow into the cooling jacket (10) by the inner fan (50) and passing the air flow through the inner cooling core (20) such that the air flow transfers heat to the cooling liquid (702) in the inner cooling core (20);
driving the air flow after heat release into a shell (703) of the motor (100) by using the inner fan (50);
outputting the coolant liquid absorbing heat in the inner cooling core (20) into the outer cooling core (30) through the circulating impeller (40), and transferring the coolant liquid in the outer cooling core (30) into the inner cooling core (20) (704);
cooling (705) the coolant in the outer cooling core (30) by the outer fan (60).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810837918.XA CN110768464A (en) | 2018-07-26 | 2018-07-26 | Motor cooling device and motor cooling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810837918.XA CN110768464A (en) | 2018-07-26 | 2018-07-26 | Motor cooling device and motor cooling method |
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| Publication Number | Publication Date |
|---|---|
| CN110768464A true CN110768464A (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810837918.XA Pending CN110768464A (en) | 2018-07-26 | 2018-07-26 | Motor cooling device and motor cooling method |
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| Country | Link |
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| CN (1) | CN110768464A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022059425A1 (en) * | 2020-09-17 | 2022-03-24 | 株式会社デンソー | Rotating electric machine unit |
| WO2024050793A1 (en) * | 2022-09-08 | 2024-03-14 | 广东逸动科技有限公司 | Power unit, heat dissipation circulation system, and device movable in water body |
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| JPS56107756A (en) * | 1980-01-25 | 1981-08-26 | Toshiba Corp | Cooler for rotary electric machine |
| CN102577045A (en) * | 2009-10-01 | 2012-07-11 | Abb公司 | A cooling system for an electrical machine |
| CN105379080A (en) * | 2013-07-19 | 2016-03-02 | 株式会社东芝 | Liquid-cooled electric motor |
| CN206517266U (en) * | 2016-12-16 | 2017-09-22 | 卧龙电气集团股份有限公司 | A kind of high Large Copacity high-speed and high-efficiency threephase asynchronous in low center |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS56107756A (en) * | 1980-01-25 | 1981-08-26 | Toshiba Corp | Cooler for rotary electric machine |
| CN102577045A (en) * | 2009-10-01 | 2012-07-11 | Abb公司 | A cooling system for an electrical machine |
| CN105379080A (en) * | 2013-07-19 | 2016-03-02 | 株式会社东芝 | Liquid-cooled electric motor |
| CN206517266U (en) * | 2016-12-16 | 2017-09-22 | 卧龙电气集团股份有限公司 | A kind of high Large Copacity high-speed and high-efficiency threephase asynchronous in low center |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022059425A1 (en) * | 2020-09-17 | 2022-03-24 | 株式会社デンソー | Rotating electric machine unit |
| JP2022050182A (en) * | 2020-09-17 | 2022-03-30 | 株式会社デンソー | Rotary electric machine unit |
| JP7314892B2 (en) | 2020-09-17 | 2023-07-26 | 株式会社デンソー | Rotating electric machine unit |
| WO2024050793A1 (en) * | 2022-09-08 | 2024-03-14 | 广东逸动科技有限公司 | Power unit, heat dissipation circulation system, and device movable in water body |
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Application publication date: 20200207 |