CN112072855A - Electric machine - Google Patents

Electric machine Download PDF

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Publication number
CN112072855A
CN112072855A CN202010996783.9A CN202010996783A CN112072855A CN 112072855 A CN112072855 A CN 112072855A CN 202010996783 A CN202010996783 A CN 202010996783A CN 112072855 A CN112072855 A CN 112072855A
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CN
China
Prior art keywords
cooling
motor
stator
rotor
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010996783.9A
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Chinese (zh)
Other versions
CN112072855B (en
Inventor
郑国丽
黄鹏程
丰帆
王虎
杨琰河
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Zhuzhou Electric Co Ltd
Original Assignee
CRRC Zhuzhou Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to CN202010996783.9A priority Critical patent/CN112072855B/en
Publication of CN112072855A publication Critical patent/CN112072855A/en
Application granted granted Critical
Publication of CN112072855B publication Critical patent/CN112072855B/en
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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • 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
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The invention discloses a motor.A sealing part is arranged on a cooling bottom plate at the inlet end of a cooling medium of an external air path, so that air flow driven by an internal fan enters through an air inlet duct and can only enter a cooling cover through a rotor and a stator, the cooling medium is forced to enter the stator to cool the stator, the air quantity of a straight-section winding is increased, the temperature difference between the cooling straight-section winding and a cooling end winding is reduced, the axial temperature difference of the stator is reduced, the temperature distribution uniformity is improved, the hot point temperature difference of the winding is reduced, and the running reliability of the motor is improved; it makes amount of wind rational distribution, and the temperature difference between the temperature that gets into motor body through cooling module axle extension side and non-axle side reduces, improves motor both sides temperature homogeneity, improves the cooling effect of stator simultaneously.

Description

Electric machine
Technical Field
The invention relates to the technical field of motors, in particular to a motor.
Background
With the popularization of high-efficiency energy-saving motors, the design of the motors gradually develops towards high efficiency, miniaturization, light weight and low cost. The temperature rise of the motor becomes a key factor restricting the development of the motor. A common cooling method for high-voltage motors is an air-cooled structure, which is characterized in that a primary cooling medium circulates in a closed loop and heat is transferred to a surrounding medium through an externally mounted cooler directly mounted on the motor. The key technical problems to be solved by adopting the cooling mode comprise: on one hand, the temperature rise of the stator winding is ensured not to exceed the allowable temperature rise limit value; on the other hand, the non-uniformity of the temperature distribution of the winding is reduced, so that the running reliability of the motor is improved.
In the prior art, a cooling medium cooled by a cooler enters a motor body, two circulation loops are formed under the driving of a fan and a rotor, each circulation loop is provided with two branches, and a branch I enters a rotor radial air channel to cool the rotor and then enters a stator radial air channel to cool a stator; and the second branch circuit directly enters the cooler after cooling the stator end winding. The prior art has the following defects: firstly, the cooling medium of the external air path absorbs heat along the way, the temperature of the cooling medium is continuously increased from the inlet to the outlet, and the temperature of the cooling medium entering the motor body from the shaft extension side is higher than that of the cooling medium entering the motor body from the non-shaft extension side after being cooled by the cooler, so that the asymmetric temperature distribution at the two sides of the motor is directly caused. Secondly, the two-pole high-voltage motor has high rotating speed, and if the air pressure of the fan is increased in order to increase the cooling air volume, the mechanical loss of the motor is increased, and the pneumatic noise is increased, so that the air path structure is improved as much as possible, the air volume is reasonably distributed, and the cooling effect of the stator is improved.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide a motor to reduce the temperature difference between the end winding and the straight section, and to solve the problem of asymmetric temperature distribution on both sides of the motor.
In order to achieve the first object, the invention provides the following technical scheme:
a motor comprises a cooling cover, a cooling assembly arranged in the cooling cover, an inner fan and an outer fan; the inner fan and the outer fan are both arranged on a rotating shaft of the motor, the inner fan is positioned in a shell of the motor, the outer fan is positioned outside the shell of the motor, and the outer fan is used for cooling a cooling medium entering the cooling assembly; further comprising:
the base clapboard is sleeved on the rotating shaft of the motor;
the cooling cover comprises a cooling bottom plate communicated with the shell of the motor, and the cooling bottom plate is provided with an air inlet duct communicated with the interior of the shell of the motor and the cooling cover respectively;
the cooling bottom plate close to the inlet end of the cooling medium of the outer air passage is provided with a sealing part, two ends of the sealing part are respectively sealed with the base partition plate and the air inlet duct and used for separating the motor and the cooling cover, so that air flow driven by the inner fan enters the cooling cover after passing through a stator and a rotor of the motor and returns to the shell of the motor through the air inlet duct after being cooled by the cooling assembly in the cooling cover.
Preferably, the inner fan includes a first inner fan and a second inner fan disposed along an axial direction of a rotation shaft of the motor;
the cooling bottom plate comprises a first air inlet duct and a second air inlet duct which are arranged along the axial direction of a rotating shaft of the motor;
the base partition plate includes:
the first machine base partition plate and the second machine base partition plate are respectively arranged at two ends of the stator along the axial direction, and the sealing part is respectively connected with the first machine base partition plate and the first air inlet duct in a sealing manner; and an airflow gap for airflow to pass through is arranged between the second base partition plate and the cooling bottom plate.
Preferably, the cooling bottom plate is provided with an air flow through hole for passing air flow between the second base partition plate and the second air duct.
Preferably, the stator is provided with a plurality of stator radial air ducts and stator axial ventilation holes which penetrate along the axial direction, and air flow passes through the stator axial ventilation holes and the stator radial air ducts and enters the cooling cover.
Preferably, the rotor is provided with a plurality of rotor radial air channels and rotor axial ventilation holes which penetrate along the axial direction, airflow passes through the rotor axial ventilation holes, the rotor radial air channels enter the stator radial air channels, and the stator radial air channels and the rotor radial air channels are arranged along the axial direction in a staggered mode.
Preferably, the stator axial ventilation hole and the rotor axial ventilation hole may be a circular hole, a square hole, or an elliptical hole, respectively.
The invention provides a motor, which comprises a cooling cover, a cooling assembly arranged in the cooling cover, an inner fan and an outer fan, wherein the cooling assembly comprises a fan body and a fan cover; the inner fan and the outer fan are both arranged on a rotating shaft of the motor, the inner fan is positioned in a shell of the motor, the outer fan is positioned outside the shell of the motor, and the outer fan is used for cooling a cooling medium entering the cooling assembly; further comprising: the base clapboard is sleeved on the rotating shaft of the motor; the cooling cover comprises a cooling bottom plate communicated with the shell of the motor, and the cooling bottom plate is provided with an air inlet duct communicated with the interior of the shell of the motor and the cooling cover respectively; the cooling bottom plate close to the inlet end of the cooling medium of the external air path is provided with a sealing part, two ends of the sealing part are respectively sealed with the base partition plate and the air inlet duct and used for separating the motor and the cooling cover, so that the air flow driven by the internal fan passes through the stator and the rotor of the motor and then enters the cooling cover, and is cooled by the cooling assembly in the cooling cover and then returns to the shell of the motor through the air inlet duct.
Compared with the prior art, the motor provided by the invention has the following technical effects:
firstly, a sealing part is arranged on a cooling bottom plate at the inlet end of a cooling medium of an external air path, so that air flow driven by an internal fan enters through an air inlet duct and can only enter a cooling cover through a rotor and a stator, the cooling medium is forced to enter the stator to cool the stator, the air quantity of a straight-section winding is increased, the temperature difference between the cooling straight-section winding and a cooling end winding is reduced, the axial temperature difference of the stator is reduced, the temperature distribution uniformity is improved, the hot point temperature difference of the winding is reduced, and the running reliability of a motor is improved;
and secondly, the air quantity is reasonably distributed, the temperature difference between the temperature entering the motor body through the shaft extension side of the cooling assembly and the temperature difference between the non-shaft side of the motor body are reduced, the temperature uniformity of the two sides of the motor is improved, and the cooling effect of the stator is improved simultaneously.
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 described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a motor according to an embodiment of the present invention;
fig. 2 is a schematic view of the stator and rotor axial vents provided in the embodiment of the present invention.
The drawings are numbered as follows:
10. a rotor; 11. a rotor axial vent; 12. a rotor radial air duct; 13. a balance disc; 14. a first inner fan; 15. a rotating shaft; 16. an external fan; 17. a second inner fan; 18. a motor; 20. a stator; 21. a stator axial vent; 22. a stator radial air duct; 23. a stator end winding; 30. a cooling jacket; 31. a sealing part; 32. cooling the bottom plate; 40. a first chassis partition; 41. a second base partition; 100. a first air inlet duct; 101. and a second air inlet duct.
Detailed Description
The embodiment of the invention discloses a motor, which aims to reduce the temperature difference between an end winding and a straight section and solve the problem of asymmetric temperature distribution on two sides of the motor.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, fig. 1 is a schematic structural diagram of a motor according to an embodiment of the present invention; fig. 2 is a schematic view of the stator and rotor axial vents provided in the embodiment of the present invention.
In a particular embodiment, the present invention provides a motor comprising:
a cooling cover 30, a cooling module provided in the cooling cover 30, an inner fan, and an outer fan 16; the inner fan and the outer fan 16 are both arranged on the rotating shaft 15 of the motor 18, the inner fan is positioned in the shell of the motor 18, the outer fan 16 is positioned outside the shell of the motor 18, and the outer fan 16 is used for cooling a cooling medium entering the cooling assembly;
the cooling component can be a cooling pipe, a cooling medium in the cooling pipe can be selected according to needs, and the cooling mode can be air cooling, air water cooling, open type cooling and the like. The cooling cover 30 is in communication with the housing of the motor 18, and the specific structure and connection relationship thereof can refer to the prior art, which is not described herein. The outer fan 16 is used for blowing an environment medium into the cooling pipe, and after heat exchange with the primary cooling medium in the pipe is completed, the environment medium enters the surrounding environment again, the outer air cooling medium absorbs heat along the way, and the temperature is gradually increased, so that the temperature of the outer air cooling medium entering the two sides of the motor 18 after being cooled by the cooling pipe is inconsistent, the temperature of one side close to the inlet end of the outer air cooling medium is lower, and the temperature of one side close to the outlet end of the outer air cooling medium is higher.
The above-mentioned device still includes:
a base partition plate sleeved on the rotating shaft 15 of the motor 18;
the cooling cover 30 comprises a cooling bottom plate 32 communicated with the shell of the motor 18, and the cooling bottom plate 32 is provided with an air inlet duct communicated with the interior of the shell of the motor 18 and the cooling cover 30 respectively;
the base partition plates are respectively arranged at two axial ends of the rotor 10 and the stator 20 and used for separating air inlet and air outlet, so that air flow driven by the inner fan can cool the rotor 10 and the stator 20 through the rotor and improve the cooling effect.
The cooling bottom plate 32 is provided with an air inlet which is communicated with the cooling cover 30 and the inside of the shell of the motor 18, the air inlet is connected with an air inlet duct which extends into the shell of the motor 18, the air inlet duct is detachably and fixedly connected with the air inlet, and the inner fan is arranged in the air inlet duct so as to effectively drive the air inlet flow.
The cooling bottom plate 32 near the inlet end (cold end) of the cooling medium of the external air passage is provided with a sealing part 31, two ends of the sealing part 31 are respectively sealed with the base partition plate and the air inlet duct to separate the motor 18 and the cooling cover 30, preferably, the sealing part 31 is welded on the cooling bottom plate 32, and the length of the sealing part 31 is greater than the distance between the base partition plate and the air inlet duct. The arrangement is such that the air flow near the cooling medium inlet end of the outer air duct passes through the air inlet duct, then is driven by the inner fan to pass through the stator 20 and the rotor 10 of the motor 18, then enters the cooling cover 30, and is cooled by the cooling assembly in the cooling cover 30 and then returns to the housing of the motor 18 through the air inlet duct.
Compared with the prior art, the motor provided by the invention has the following technical effects:
firstly, a sealing part 31 is arranged on a cooling bottom plate 32 at the inlet end of a cooling medium of an external air path, so that air flow driven by an internal fan enters through an air inlet duct and can only enter a cooling cover 30 through a rotor 10 and a stator 20, the cooling medium is forced to enter the stator 20 to cool the stator 20, the air volume of a straight-section winding is increased, the temperature difference between a cooling straight-section winding and a cooling end winding is reduced, the axial temperature difference of the stator 20 is reduced, the temperature distribution uniformity is improved, the hot-spot temperature difference of the winding is reduced, and the running reliability of a motor 18 is improved;
secondly, it makes the amount of wind rational distribution, and the temperature difference between the temperature and the non-shaft side that gets into the motor 18 body through the cooling module axle stretches the side reduces, improves motor 18 both sides temperature homogeneity, improves stator 20's cooling effect simultaneously.
Specifically, the inner fan includes a first inner fan 14 and a second inner fan 17 disposed along an axial direction of a rotating shaft 15 of a motor 18;
the cooling base plate 32 includes a first air inlet duct 100 and a second air inlet duct 101 provided in the axial direction of the rotary shaft 15 of the motor 18;
the frame baffle includes:
a first base partition plate 40 and a second base partition plate 41 respectively arranged at both ends of the stator 20 along the axial direction, and a sealing part 31 is respectively connected with the first base partition plate 40 and the first air inlet duct 100 in a sealing manner; an airflow gap for the airflow to pass through is provided between the second base partition plate 41 and the cooling bottom plate 32, thereby reducing the flow resistance of the airflow.
The first and second inner fans 14 and 17 have the same structure, and the first and second air inlet ducts 100 and 101 have the same structure.
Preferably, the cooling bottom plate 32 is provided with an air flow through hole for passing an air flow between the second base partition plate 41 and the second air duct. The air flow through holes can be arranged into air flow channels or other structures, the structures of the air flow through holes can be round holes, square holes and the like, and the air flow through holes can be arranged according to requirements and are within the protection scope of the invention.
On the basis of the above embodiments, the stator 20 is provided with a plurality of stator radial air ducts 22 and stator axial ventilation holes 21 penetrating in the axial direction, and the air flow enters the cooling cover 30 through the stator axial ventilation holes 21 and the stator radial air ducts 22.
The rotor 10 is provided with a plurality of rotor radial air ducts 12 and rotor axial ventilation holes 11 penetrating along the axial direction, airflow enters the stator radial air duct 22 through the rotor axial ventilation holes 11 and the rotor radial air ducts 12, and all the stator radial air ducts 22 and all the rotor radial air ducts 12 are arranged along the axial direction in a staggered manner. In one embodiment, the stator radial air ducts 22 in the middle and the rotor radial air ducts 12 in the middle are arranged in a collinear manner, the rotor radial air ducts 12 on both sides of the center line converge toward the center line, and the offset distance between each rotor radial air duct 12 and the adjacent stator radial air duct 22 is the same.
The stator axial ventilation holes 21 and the rotor axial ventilation holes 11 may be circular holes, square holes or elliptical holes, respectively.
In an embodiment, the cooling medium inlet end near the outer wind path is a cold end, and the cooling medium outlet end near the outer wind path is a hot end, it can be seen that the cooling medium on the outer wind path passes through the first air inlet duct 100 and the second air inlet duct 101 in sequence, after the cooling medium on the cold end enters the motor 18, the cooling medium is driven by the first inner fan 14 and is divided into two branches, and the cooling medium on the first branch enters the rotor axial ventilation hole 11, the rotor radial air duct 12, the stator radial air duct 22, the balance disc 13 in sequence, and finally enters the cooling cover 30.
After entering the motor 18, the hot end cooling medium is driven by the second inner fan 17 and divided into three branches, wherein the first branch cooling medium sequentially enters the rotor axial vent hole 11, the rotor 10 radial air duct, the stator radial air duct 22, the balance disc 13 and finally the cooling cover 30; after the stator end winding 23 of the second branch cooling medium cooling hot end enters the stator axial ventilation hole 21 to cool the stator 20, the stator end winding enters the cooling cover 30, and after the stator end winding 23 of the third branch cooling medium cooling hot end directly enters the cooling cover 30 through the airflow gap and the airflow hole.
The first machine base partition plate 40 is connected with the sealing part 31 in a sealing mode, cooling media are forced to enter the stator axial ventilation holes 21 to cool the stator 20, the second machine base partition plate 41 and the cooling bottom plate 32 are provided with air flow through holes, the cooling media can pass through the air flow through holes, flowing resistance of the hot end is reduced, axial temperature difference of the stator 20 is reduced, temperature distribution uniformity is improved, hot point temperature rise of a winding is reduced, and running reliability of the motor 18 is improved.
Finally, it should also be 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 identical elements in a process, method, article, or apparatus that comprises the element.

Claims (6)

1. A motor comprises a cooling cover, a cooling assembly arranged in the cooling cover, an inner fan and an outer fan; the inner fan and the outer fan are both arranged on a rotating shaft of the motor, the inner fan is positioned in a shell of the motor, the outer fan is positioned outside the shell of the motor, and the outer fan is used for cooling a cooling medium entering the cooling assembly; it is characterized by also comprising:
the base clapboard is sleeved on the rotating shaft of the motor;
the cooling cover comprises a cooling bottom plate communicated with the shell of the motor, and the cooling bottom plate is provided with an air inlet duct communicated with the interior of the shell of the motor and the cooling cover respectively;
the cooling bottom plate close to the inlet end of the cooling medium of the outer air passage is provided with a sealing part, two ends of the sealing part are respectively sealed with the base partition plate and the air inlet duct and used for separating the motor and the cooling cover, so that air flow driven by the inner fan enters the cooling cover after passing through a stator and a rotor of the motor and returns to the shell of the motor through the air inlet duct after being cooled by the cooling assembly in the cooling cover.
2. The motor of claim 1, wherein the inner fan includes a first inner fan and a second inner fan disposed in an axial direction of a rotating shaft of the motor;
the cooling bottom plate comprises a first air inlet duct and a second air inlet duct which are arranged along the axial direction of a rotating shaft of the motor;
the base partition plate includes:
the first machine base partition plate and the second machine base partition plate are respectively arranged at two ends of the stator along the axial direction, and the sealing part is respectively connected with the first machine base partition plate and the first air inlet duct in a sealing manner; and an airflow gap for airflow to pass through is arranged between the second base partition plate and the cooling bottom plate.
3. The electric machine of claim 2, wherein the cooling floor is provided with an air flow passage for air flow between the second frame divider and the second air duct.
4. The electric machine according to any of claims 1-3, wherein the stator is provided with a plurality of stator radial air ducts and stator axial ventilation holes running axially therethrough, and the air flow enters the cooling jacket through the stator axial ventilation holes and the stator radial air ducts.
5. The motor of claim 4, wherein the rotor is provided with a plurality of rotor radial air ducts and rotor axial ventilation holes penetrating along the axial direction, airflow enters the stator radial air ducts through the rotor axial ventilation holes and the rotor radial air ducts, and all the stator radial air ducts and all the rotor radial air ducts are arranged in a staggered manner along the axial direction.
6. The electric machine of claim 5 wherein the stator axial vents and the rotor axial vents can be circular, square, or elliptical holes, respectively.
CN202010996783.9A 2020-09-21 2020-09-21 Motor Active CN112072855B (en)

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Application Number Priority Date Filing Date Title
CN202010996783.9A CN112072855B (en) 2020-09-21 2020-09-21 Motor

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Application Number Priority Date Filing Date Title
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CN112072855B CN112072855B (en) 2023-04-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116404809A (en) * 2023-05-26 2023-07-07 河南全新机电设备有限公司 Fan structure for slow-rotation-speed permanent magnet synchronous motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102361382A (en) * 2011-10-26 2012-02-22 中电电机股份有限公司 Stator air duct and rotor air duct structure of bipolar motor
CN106059197A (en) * 2016-08-16 2016-10-26 中车株洲电机有限公司 Internal wind path of motor
CN108429402A (en) * 2018-05-21 2018-08-21 广东上水能源科技有限公司 A kind of motor cooling based on coolant liquid
CN210927353U (en) * 2019-11-08 2020-07-03 卧龙电气南阳防爆集团股份有限公司 Low-vibration low-noise vertical motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102361382A (en) * 2011-10-26 2012-02-22 中电电机股份有限公司 Stator air duct and rotor air duct structure of bipolar motor
CN106059197A (en) * 2016-08-16 2016-10-26 中车株洲电机有限公司 Internal wind path of motor
CN108429402A (en) * 2018-05-21 2018-08-21 广东上水能源科技有限公司 A kind of motor cooling based on coolant liquid
CN210927353U (en) * 2019-11-08 2020-07-03 卧龙电气南阳防爆集团股份有限公司 Low-vibration low-noise vertical motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116404809A (en) * 2023-05-26 2023-07-07 河南全新机电设备有限公司 Fan structure for slow-rotation-speed permanent magnet synchronous motor
CN116404809B (en) * 2023-05-26 2023-10-20 河南全新机电设备有限公司 Fan structure for slow-rotation-speed permanent magnet synchronous motor

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