CN116418163A - Totally-enclosed self-ventilation traction motor and vehicle - Google Patents

Totally-enclosed self-ventilation traction motor and vehicle Download PDF

Info

Publication number
CN116418163A
CN116418163A CN202111648397.1A CN202111648397A CN116418163A CN 116418163 A CN116418163 A CN 116418163A CN 202111648397 A CN202111648397 A CN 202111648397A CN 116418163 A CN116418163 A CN 116418163A
Authority
CN
China
Prior art keywords
air duct
assembly
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.)
Pending
Application number
CN202111648397.1A
Other languages
Chinese (zh)
Inventor
薛秀慧
李祥成
哈大雷
姜琛
赵宇坤
王津
谢爱争
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 Yongji Electric Co Ltd
Original Assignee
CRRC Yongji 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.)
Filing date
Publication date
Application filed by CRRC Yongji Electric Co Ltd filed Critical CRRC Yongji Electric Co Ltd
Priority to CN202111648397.1A priority Critical patent/CN116418163A/en
Publication of CN116418163A publication Critical patent/CN116418163A/en
Pending legal-status Critical Current

Links

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
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • 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
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
    • 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
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The invention discloses a totally-enclosed self-ventilation traction motor and a vehicle. When the self-ventilation traction motor is used, the totally-enclosed self-ventilation traction motor is started, external cold air respectively enters the first external cooling air channel, the second external cooling air channel and the third external cooling air channel, exchanges heat with the front bearing assembly, the rear bearing assembly and the cooling stator assembly respectively, and then is discharged into external air to realize cooling of the front bearing assembly, the rear bearing assembly and the cooling stator assembly; meanwhile, in the closed cavity of the totally-enclosed self-ventilation traction motor, internal gas flows through an internal cooling air channel, a stator end coil and the closed cavity on the rotor assembly to form an internal circulation air channel so as to cool the rotor assembly and the stator end coil. According to the invention, the front bearing assembly, the rear bearing assembly, the cooling stator assembly, the rotor assembly and the stator end coil are cooled simultaneously, and the cooling efficiency is improved.

Description

Totally-enclosed self-ventilation traction motor and vehicle
Technical Field
The invention relates to the technical field of traction motors, in particular to a totally-enclosed self-ventilation traction motor and a vehicle.
Background
When the totally-enclosed traction motor works, besides the lamination of the stator lamination part and the effective part of the winding generate heat, the following parts also generate heat: the motor comprises a transmission end bearing, a non-transmission end bearing, a rotor core, permanent magnets on a rotor and stator winding end parts.
In the prior art, the totally-enclosed traction motor can only dissipate heat generated by parts except for lamination and winding effective parts of a stator lamination part to a limited extent, and can not directly cool a driving end bearing, a non-driving end bearing, a rotor core, permanent magnets on a rotor, stator winding end parts and the like, so that the totally-enclosed traction motor has low heat dissipation efficiency.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide a totally enclosed self-ventilation traction motor, which aims to improve heat dissipation efficiency.
A second object of the present invention is to provide a vehicle.
In order to achieve the first object, the present invention provides the following solutions:
a totally-enclosed self-ventilation traction motor comprises a front bearing assembly, a rear end bearing assembly, a stator assembly and a rotor assembly;
the front bearing assembly and the rear bearing assembly can rotatably support the rotor assembly, and two ends of the stator assembly are respectively and fixedly connected with the front bearing assembly and the rear bearing assembly in a sealing way and are enclosed to form a closed cavity for accommodating the rotor assembly;
the front bearing assembly, the rear bearing assembly and the stator assembly are respectively provided with a first outer cooling air channel, a second outer cooling air channel and a third outer cooling air channel, both ends of which are communicated with outside air, and the first outer cooling air channel, the second outer cooling air channel and the third outer cooling air channel are respectively used for cooling the front bearing assembly, the rear bearing assembly and the stator assembly;
an inner cooling air channel communicated with the closed cavity is formed on the rotor assembly, and the inner cooling air channel and the closed cavity form an inner circulation air channel for circulating cooling so as to cool the rotor assembly and an inner cooling air channel extending to an inner cooling air channel of a coil at the end part of the stator in the inner circulation air channel.
In a specific embodiment, the front bearing assembly comprises a front bearing, a front end cap, and a front bearing chamber;
the inner ring of the front bearing is rotatably connected with the rotor assembly, the front bearing chamber is connected with the outer ring of the front bearing, and the front end cover is connected with the end of the front bearing chamber away from the rear end bearing assembly;
the first external cooling air duct comprises a front bearing chamber air duct and a front end cover air duct, the front bearing chamber air duct is arranged on the front bearing chamber, the front end cover air duct is arranged on the front end cover, the inlet of the front bearing chamber air duct is communicated with the outside air, the outlet of the front bearing chamber air duct is communicated with the inlet of the front end cover air duct, and the outlet of the front end cover air duct is communicated with the outside air.
In another specific embodiment, a first heat dissipation fin is arranged on the front end cover, a second heat dissipation fin is arranged on the front bearing chamber, and external air flows through the first heat dissipation fin and the second heat dissipation fin to enter the first external cooling air duct;
a front bearing cooling fan is coaxially arranged on one side of the front bearing chamber, which is away from the end face of the rotor assembly, and is used for sucking outside air into the first outer cooling air duct;
the front end cover is provided with a front air inlet cover buckled with the first cooling air duct and the front bearing cooling fan;
the front end cover air duct is a U-shaped air duct.
In another specific embodiment, the rear bearing assembly includes a rear bearing, a rear end cap, and a rear bearing chamber;
the inner ring of the rear bearing is rotatably connected with the rotor assembly, the rear bearing chamber is connected with the outer ring of the rear bearing, and the rear end cover is connected with the end, far away from the rear end bearing assembly, of the rear bearing chamber;
the second external cooling air duct comprises a rear bearing chamber air duct and a rear end cover air duct, the rear bearing chamber air duct is arranged on the rear bearing chamber, the rear end cover air duct is arranged on the rear end cover, the inlet of the rear end cover air duct is communicated with the outside air, the outlet of the rear end cover air duct is communicated with the inlet of the rear bearing chamber air duct, and the outlet of the rear bearing chamber air duct is communicated with the outside air.
In another specific embodiment, a rear bearing cooling fan is coaxially installed on one side of the end face of the rear bearing chamber, which is away from the rear end cover, and is used for sucking external air into the second external cooling air duct, a cooling fan axial air duct with an inlet communicated with an outlet of the rear bearing chamber air duct is formed on the rear bearing cooling fan, and an outlet of the cooling fan axial air duct is communicated with the external air;
the rear end cover is provided with a rear air inlet cover buckled with the second outer cooling air duct and the rear bearing cooling fan;
the air duct of the rear end cover is an L-shaped air duct.
In another particular embodiment, the stator assembly includes a stator lamination, a stator coil, and a housing;
the two ends of the stand are respectively connected with the front bearing assembly and the rear bearing assembly in a sealing way;
the stator lamination is stacked in the machine base, and stator slots for installing stator coils are formed in the stator lamination;
the third cooling air duct comprises a stator axial air duct, a first machine base axial air duct and a second machine base axial air duct, the stator axial air duct is arranged on the stator lamination, and the first machine base axial air duct and the second machine base axial air duct are both arranged on the machine base;
the two ends of the stator axial air channel are respectively communicated with the outlet of the first machine seat axial air channel and the inlet of the second machine seat axial air channel, and the inlet of the first machine seat axial air channel and the outlet of the second machine seat axial air channel are respectively communicated with the outside air.
In another specific embodiment, the inlet of the first housing axial air duct is in communication with the inlet of the rear end cap air duct;
and/or
The third cooling air duct further comprises a first gap air duct formed by gaps between the stator laminations and the inner wall of the machine base, one end of the first gap air duct is communicated with the outlet of the first machine base axial air duct, and the other end of the first gap air duct is communicated with the inlet of the second machine base axial air duct.
In another specific embodiment, the rotor assembly comprises a shaft, rotor laminations, permanent magnets, and a cooler;
the rotor lamination is stacked on the rotating shaft, permanent magnet grooves for mounting the permanent magnets are formed in the rotor lamination, and the cooler is mounted on the base;
the inner cooling air duct comprises a rotor axial air duct, the rotor axial air duct is arranged on the rotor lamination, a cooler channel is arranged on the cooler, through holes which are respectively communicated with the two ends of the cooler channel are arranged on the machine base, and the two ends of the cooler channel are respectively communicated with the two ends of the rotor axial air duct through the through holes.
In another specific embodiment, the rotor assembly includes a rotor cooling fan;
the rotor cooling fan is sleeved outside the rotating shaft and used for sucking air on one side of the rotor axial air duct into the other side, and the air flows through the stator end coil and the cooler channel to enter one side of the rotor axial air duct.
In another specific embodiment, the housing is provided with a vent hole for allowing gas to flow through the cooler;
the machine base is used for installing the inner wall surface of the top wall of the cooler and the stator lamination enclose to form a second clearance air channel communicated with the ventilation hole, one end of the second clearance air channel is communicated with the outlet of the first machine base channel, and the other end of the second clearance air channel is closed and cut off.
In another specific embodiment, the cross-section of the second gap wind channel is larger than the cross-section of the first gap wind channel.
The various embodiments according to the invention may be combined as desired and the resulting embodiments after such combination are also within the scope of the invention and are part of specific embodiments of the invention.
When the totally-enclosed self-ventilation traction motor is used, the totally-enclosed self-ventilation traction motor is started, external cold air respectively enters the first external cooling air duct, the second external cooling air duct and the third external cooling air duct, exchanges heat with the front bearing assembly, the rear bearing assembly and the cooling stator assembly respectively, and then is discharged into external air to realize cooling of the front bearing assembly, the rear bearing assembly and the cooling stator assembly; meanwhile, in the closed cavity of the totally-enclosed self-ventilation traction motor, internal gas flows through an internal cooling air channel, a stator end coil and the closed cavity on the rotor assembly to form an internal circulation air channel so as to cool the rotor assembly and the stator end coil. According to the invention, the front bearing assembly, the rear bearing assembly, the cooling stator assembly, the rotor assembly and the stator end coil are cooled simultaneously, and the cooling efficiency is improved.
In order to achieve the second object, the present invention provides the following solutions:
a vehicle comprising a fully enclosed self-ventilating traction motor as in any one of the preceding claims.
Because the vehicle provided by the invention comprises the totally-enclosed self-ventilation traction motor in any one of the above, the totally-enclosed self-ventilation traction motor has the beneficial effects that the vehicle disclosed by the invention comprises.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic axial sectional view of a fully enclosed self-ventilating traction motor provided by the present invention;
FIG. 2 is a schematic diagram of a radial sectional structure of a fully enclosed self-ventilated traction motor provided by the present invention;
fig. 3 is a schematic top view of a stand according to the present invention.
Wherein, in fig. 1-3:
1-front bearing assembly, 11-front bearing, 12-front end cap, 13-front bearing chamber, 14-front bearing cooling fan, 15-front air intake shroud, 12A-first heat dissipating fins, 12B-front end cap air duct, 13A-second heat dissipating fins, 13B-front bearing chamber air duct, 15A-front air intake aperture, 21-rear bearing, 2-rear bearing assembly, 24-rear bearing cooling fan, 22-rear end cap, 22A-rear end cap air duct, 23-rear bearing chamber, 23A-rear bearing chamber air duct, 25-rear air intake shroud, 24A-cooling fan axial air duct, 25A-rear air intake aperture, 3-stator assembly, 31-stator lamination, 32-stator coil, 31B-stator lamination yoke first row axial air duct, 31C-stator lamination yoke second row axial air duct, 31D-stator lamination yoke third row axial air duct, 33-housing, 33D-first housing axial air duct, 33E-second housing axial air duct, 31A-first gap air duct, 31E-second gap air duct, 33A-vent, 33B-first through hole, 33C-second through hole, 4-rotor assembly, 41-spindle, 42-rotor lamination, 43-permanent magnet, 44-cooler, 45-rotor cooling fan, 42A-rotor axial air duct, 44A-radiating pipe, 5-stator end coil, 51A-stator coil left end, 51B-stator coil right end, R1-first outer cooling air duct, R2-second outer cooling air duct, R3-third outer cooling air duct, r4-internal circulation air duct.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 3 in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top surface", "bottom surface", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the indicated positions or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limitations of the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1-2, the first aspect of the present invention provides a totally enclosed self-ventilation traction motor, which can cool a front bearing assembly 1, a rear bearing assembly 2, a cooling stator assembly 3, a rotor assembly 4 and a stator end coil 5 at the same time, thereby improving the cooling efficiency of the totally enclosed self-ventilation traction motor.
The totally-enclosed self-ventilation traction motor comprises a front bearing assembly 1, a rear end bearing assembly, a stator assembly 3 and a rotor assembly 4.
The front bearing assembly 1 and the rear bearing assembly 2 rotatably support the rotor assembly 4, and two ends of the stator assembly 3 are respectively and fixedly connected with the front bearing assembly 1 and the rear bearing assembly 2 in a sealing way and enclose a closed cavity for accommodating the rotor assembly 4.
The front bearing assembly 1, the rear bearing assembly 2 and the stator assembly 3 are respectively provided with a first outer cooling air channel R1, a second outer cooling air channel R2 and a third outer cooling air channel R3, both ends of which are communicated with outside air.
One end of the first external cooling air duct R1 is used for air inlet, and the other end is used for air outlet and used for cooling the front bearing assembly 1.
The cross section and the trajectory of the first external cooling air duct R1 are not limited, and for example, the cross section of the first external cooling air duct R1 may be a regular shape such as a circle or a rectangle, or may be an irregular shape, or the like, and the trajectory may be a straight line with multiple sections connected end to end, or may be a curve, or the like.
One end of the second external cooling air duct R2 is used for air inlet, and the other end is used for air outlet and is used for cooling the rear bearing assembly 2.
The cross section and the trace line of the second external cooling air duct R2 are not limited, and for example, the cross section of the second external cooling air duct R2 may be a regular shape such as a circle or a rectangle, or may be an irregular shape, or the like, and the trace line may be a straight line with multiple sections connected end to end, or may be a curve, or the like.
One end of the third external cooling air channel R3 is used for air inlet, and the other end is used for air outlet, and the third external cooling air channel R3 is used for cooling the stator assembly 3. The cross section and the trajectory of the third external cooling air duct R3 are not limited, and for example, the cross section of the third external cooling air duct R3 may be a regular shape such as a circle or a rectangle, or may be an irregular shape, or the trajectory may be a straight line with multiple sections connected end to end, or may be a curve.
An internal cooling air duct communicated with the closed cavity is arranged on the rotor assembly 4, and an internal circulation air duct R4 for circulating cooling is formed by the internal cooling air duct and the closed cavity so as to cool the rotor assembly 4 and a stator end coil 5 extending into the internal circulation air duct R4. Specifically, the stator end coil 5 includes a stator coil 32 left end portion and a stator coil 32 right end portion, and the stator coil left end portion 32A and the stator coil right end portion 32B are located at both ends of the stator lamination 31, respectively.
When the totally-enclosed self-ventilation traction motor provided by the invention is used, the totally-enclosed self-ventilation traction motor is started, external cold air respectively enters the first external cooling air duct R1, the second external cooling air duct R2 and the third external cooling air duct R3 and is discharged into external air after exchanging heat with the front bearing assembly 1, the rear bearing assembly 2 and the cooling stator assembly 3 respectively, so that the cooling of the front bearing assembly 1, the rear bearing assembly 2 and the cooling stator assembly 3 is realized; meanwhile, in the closed cavity of the totally-enclosed self-ventilation traction motor, internal gas flows through the internal cooling air channel on the rotor assembly 4, the stator end coil 5 and the closed cavity to form an internal circulation air channel so as to cool the rotor assembly 4 and the stator end coil 5. According to the invention, the front bearing assembly 1, the rear bearing assembly 2, the cooling stator assembly 3, the rotor assembly 4 and the stator end coil 5 are cooled simultaneously, and the cooling efficiency is improved.
In some embodiments, the front bearing assembly 1 comprises a front bearing 11, a front end cover 12 and a front bearing chamber 13, wherein an inner ring of the front bearing 11 is rotatably connected with the rotor assembly 4, the front bearing chamber 13 is connected with an outer ring of the front bearing 11, and in particular, the front bearing chamber 13 is detachably connected with the front bearing 11 through bolts, so that the front bearing assembly is convenient to disassemble, assemble and replace.
The front end cover 12 is connected to the end of the front bearing chamber 13 remote from the rear end bearing assembly, specifically, the front end cover 12 is detachably connected to the front bearing chamber 13 by bolts or the like.
The first external cooling air duct R1 comprises a front bearing chamber air duct 13B and a front end cover air duct 12B, the front bearing chamber air duct 13B is arranged on the front bearing chamber 13, the front end cover air duct 12B is arranged on the front end cover 12, the inlet of the front bearing chamber air duct 13B is communicated with the outside air, the outlet of the front bearing chamber air duct 13B is communicated with the inlet of the front end cover air duct 12B, and the outlet of the front end cover air duct 12B is communicated with the outside air.
When the totally-enclosed self-ventilation traction motor is started, external cold air enters the front bearing chamber air duct 13B along the inlet of the front bearing chamber air duct 13B, cools the front bearing chamber 13 and the front bearing 11, then flows through the front end cover air duct 12B, cools the front end cover 12 and is discharged into the external air.
The inlet of the first external cooling air duct R1 is the inlet of the front bearing chamber air duct 13B, so that the rapid cooling of the bearing chamber and the front bearing 11 is realized, and the inlet of the first external cooling air duct R1 can be arranged on the front end cover air duct 12B.
Specifically, the front bearing chamber air channels 13B and the front end cover air channels 12B are arranged in a one-to-one correspondence manner, the number is not limited to 1, and in order to improve the heat dissipation efficiency of the front bearing assembly 1, the invention discloses that the number of the front bearing chamber air channels 13B and the front end cover air channels 12B is 4, and it should be noted that the number of the front bearing chamber air channels 13B and the front end cover air channels 12B is 4, which is only one specific embodiment of the invention, and in practical application, the number of the front bearing chamber air channels 13B and the front end cover air channels 12B can be increased or decreased as required.
In order to realize uniform heat dissipation to the front bearing assembly 1, the invention discloses a plurality of front bearing chamber air channels 13B which are annularly and uniformly distributed on the front bearing chamber 13 along the axis of the front bearing chamber 13, and a plurality of front end cover air channels 12B which are annularly and uniformly distributed on the front end cover 12 along the axis of the front end cover 12.
In order to improve the heat dissipation efficiency of the front end cover 12 and the front bearing chamber 13, the invention discloses that a first heat dissipation fin 12A is arranged on the front end cover 12, a second heat dissipation fin 13A is arranged on the front bearing chamber 13, and external air flows through the first heat dissipation fin 12A and the second heat dissipation fin 13A to enter the first external cooling air duct R1.
The number of the first heat dissipation fins 12A is plural, and the radiation is distributed on the end face of the front cover 12 along the radial direction of the front cover 12 with the intersection point of the axis of the front cover 12 and the end face of the front cover 12 as the center.
The second heat dissipation fins 13A are disposed on the end face of the front bearing chamber 13 where the inlet of the front bearing chamber air duct 13B is opened. Correspondingly, the number of the second heat dissipation fins 13A is plural, the radial radiation of the front bearing chamber 13 is distributed on the end face of the front bearing chamber 13 with the intersection point of the axis of the front bearing chamber 13 and the end face of the front bearing chamber 13 as the center, and the second heat dissipation fins 13A are aligned with the first heat dissipation fins 12A along the radial direction.
A front bearing cooling fan 14 is coaxially mounted on the side of the front bearing chamber 13 facing away from the front end cover 12 rotor assembly 4 for sucking outside air into the first outer cooling air duct R1.
Further, the invention discloses a front air inlet cover 15 which is provided with a first cooling air duct and a front bearing cooling fan 14 in a buckling manner on the front end cover 12, and a front air inlet hole 15A is formed in the front air inlet cover 15.
In order to prolong the length of the front end cover air duct 12B and facilitate the installation of the front air inlet cover 15, the invention discloses that the front end cover 12 covers the end of the front bearing chamber 13 facing the rotor assembly 4, and extends a preset length to the end of the front bearing chamber 13 facing away from the rotor assembly 4, wherein the preset length is specifically set according to the requirement.
Further, the invention discloses that the front end cover air duct 12B is a U-shaped air duct, and the outlet of the front end cover air duct 12B and the inlet of the front bearing chamber air duct 13B are arranged on the same side of the totally-enclosed self-ventilation traction motor. The front bearing chamber air duct 13B is an axial air duct opened in parallel with the axial direction of the front bearing chamber 13.
The heat dissipation process of the front bearing assembly 1 is as follows: the fully-enclosed self-ventilation traction motor rotates to drive a coaxially-installed front bearing cooling fan 14 to rotate at a high speed, cooling air is sucked from the outer side of a front air inlet cover 15, flows through a second heat dissipation fin 13A on a front bearing chamber 13 and a first heat dissipation fin 12A on a front end cover 12, enters a front bearing chamber air duct 13B and is blown out of the end face of the front end cover 12 along the front end cover air duct 12B. The heat of the front bearing 11 is conducted to the front bearing chamber 13 and the front end cover 12 through the bearing outer ring, and is transferred to the cooling air through the first heat dissipation fins 12A, the second heat dissipation fins 13A, the front bearing chamber air duct 13B and the front end cover air duct 12B in a convection heat exchange manner with the cooling air.
In some embodiments, the rear bearing assembly 2 comprises a rear bearing 21, a rear end cover 22 and a rear bearing chamber 23, wherein an inner ring of the rear bearing 21 is rotatably connected with the rotor assembly 4, the rear bearing chamber 23 is connected with an outer ring of the rear bearing 21, and in particular, in order to facilitate the disassembly and assembly of the rear bearing chamber 23 and the rear bearing 21, the rear bearing chamber 23 and the rear bearing 21 are detachably connected through bolts. The rear end cap 22 is connected to the end of the rear bearing chamber 23 remote from the rear bearing assembly 2.
The second external cooling air duct R2 includes a rear bearing chamber air duct 23A and a rear end cover air duct 22A, the rear bearing chamber air duct 23A is opened on the rear bearing chamber 23, the rear end cover air duct 22A is opened on the rear end cover 22, an inlet of the rear end cover air duct 22A is communicated with the outside air, an outlet of the rear end cover air duct 22A is communicated with an inlet of the rear bearing chamber air duct 23A, and an outlet of the rear bearing chamber air duct 23A is communicated with the outside air.
It should be noted that the inlet of the second external cooling air duct R2 may be provided in the rear bearing chamber 23.
Specifically, the invention discloses that the number of the rear bearing chamber air channels 23A and the rear end cover air channels 22A is not limited to 1, and the rear bearing chamber air channels 23A and the rear end cover air channels 22A are arranged in a one-to-one correspondence.
In order to improve the heat dissipation efficiency of the rear bearing assembly 2, the invention discloses a plurality of rear bearing chamber air channels 23A and rear end cover air channels 22A, wherein the rear bearing chamber air channels 23A are annularly and uniformly distributed on the rear bearing chamber 23 along the axial lead of the rear bearing chamber 23, and the rear end cover air channels 22A are annularly and uniformly distributed on the rear end cover 22 along the axial lead of the rear end cover 22.
Further, the invention discloses that a rear bearing cooling fan 24 is coaxially arranged on one side of the end face of the rear bearing chamber 23, which is far away from the rear end cover 22, and is used for sucking external air into the second external cooling air channel R2, a cooling fan axial air channel 24A with an inlet communicated with an outlet of the rear bearing chamber air channel 23A is arranged on the rear bearing cooling fan 24, and the outlet of the cooling fan axial air channel 24A is communicated with the external air.
In order to facilitate protection of the rear bearing cooling fan 24 and prevent impurities in the outside air from entering the second external cooling air duct R2, the invention discloses a rear air inlet cover 25 fastened with the second external cooling air duct R2 and the rear bearing cooling fan 24 is mounted on the rear end cover 22. The rear air inlet cover 25 is provided with a plurality of rear air inlet holes 25A, and the number of the rear air inlet holes 25A is plural.
Further, the invention discloses that the rear end cover air duct 22A is an L-shaped air duct, and the inlet of the rear end cover air duct 22A and the outlet of the rear bearing chamber air duct 23A are arranged on the same side of the totally-enclosed self-ventilation traction motor.
Specifically, the rear bearing chamber air duct 23A is an axial air duct along an axis parallel to the rear bearing chamber 23.
The heat dissipation process of the rear bearing assembly 2 is as follows: the totally-enclosed self-ventilation traction motor rotates to drive a coaxially installed rear bearing cooling fan 24 to rotate at a high speed, cooling air is sucked from the outer side of a rear air inlet cover 25, enters a rear end cover air channel 22A and then enters a rear bearing chamber air channel 23A, and returns to cooling air for air inlet, so that circulation is completed. The heat of the rear bearing 21 is conducted to the rear bearing chamber 23 and the rear end cover 22 through the outer ring of the rear bearing 21, and is transferred to the cooling air through the rear bearing chamber air duct 23A by convective heat exchange between the rear end cover air duct 22A and the cooling air.
In some embodiments, stator assembly 3 includes stator laminations 31, stator coils 32, and a housing 33.
The two ends of the stand 33 are respectively connected with the front bearing assembly 1 and the rear bearing assembly 2 in a sealing way, and the stator lamination 31 is stacked in the stand 33 and welded into a whole in a welding way. Specifically, stator lamination 31 is shaped like a figure 8.
Stator lamination 31 is provided with stator slots for mounting stator coils 32, and stator coils 32 are embedded in the stator slots.
The third cooling air duct includes a stator axial air duct, a first base axial air duct 33D, and a second base axial air duct 33E, the stator axial air duct is provided on the stator lamination 31, and the first base axial air duct 33D and the second base axial air duct 33E are provided on the base 33. Specifically, stator axial wind channel is offered on stator lamination yoke portion, and the number is a plurality of, divide into 3 layers setting, and the name is respectively: the stator lamination yoke first row axial air channels 31B, the stator lamination yoke second row axial air channels 31C, and the stator lamination yoke third row axial air channels 31D.
The two ends of the stator axial air channel are respectively communicated with the outlet of the first machine base axial air channel 33D and the inlet of the second machine base axial air channel 33E, and the inlet of the first machine base axial air channel 33D and the outlet of the second machine base axial air channel 33E are respectively communicated with the outside air.
Further, the inlet of the first machine base axial air duct 33D is communicated with the inlet of the rear end cover air duct 22A, so that the external air sucked by the rear bearing cooling fan 24 can enter the second external cooling air duct R2 and the third external cooling air duct R3 respectively.
Further, the present invention discloses that the third external cooling air duct R3 further includes a first gap air duct 31A formed by a gap between the stator lamination 31 and the inner wall of the housing 33, one end of the first gap air duct 31A is communicated with the outlet of the first housing axial air duct 33D, and the other end is communicated with the inlet of the second housing axial air duct 33E.
As shown in fig. 2, the first gap air channels 31A are formed by surrounding the stator lamination 31 with the left inner wall, the right inner wall, and the bottom inner wall of the base 33, and specifically, the number of the first gap air channels 31A is 5.
The stator assembly 3 dissipates heat as follows: the totally-enclosed self-ventilation traction motor rotates to drive the coaxially-installed rear bearing cooling fan 24 to rotate at a high speed, cooling air is sucked from the outer side of the rear air inlet cover 25, and most of the cooling air flows through a first machine base axial air channel 33D on the machine base 33, a three-layer stator axial air channel of a yoke part of the stator lamination 31, a first clearance air channel 31A, a second machine base axial air channel 33E and is blown out of the end face of the machine base 33. The heat of the effective part of the stator coil 32 is conducted to the stator lamination 31, and is transferred to the cooling air through the stator axial air duct and the first gap air duct 31A together with the heat of the stator lamination 31.
In some embodiments, the rotor assembly 4 includes a rotating shaft 41, a rotor lamination 42, permanent magnets 43, and a cooler 44, the rotor lamination 42 is stacked on the rotating shaft 41, slots of the permanent magnets 43 for mounting the permanent magnets 43 are formed in the rotor lamination 42, and the cooler 44 is mounted on the base 33.
The inner cooling air duct includes a rotor axial air duct 42A, the rotor axial air duct 42A is formed on the rotor lamination 42, specifically, the rotor axial air duct 42A is formed on a yoke portion of the rotor lamination 42, and the number of the rotor axial air ducts 42A is plural.
The cooler 44 is provided with a cooler channel, the base 33 is provided with through holes respectively communicated with two ends of the cooler channel, which are respectively named as a first through hole 33B and a second through hole 33C, and two ends of the cooler 44 channel are respectively communicated with two ends of the rotor axial air duct 42A through the through holes. Specifically, the through holes are rectangular holes. It should be understood that the provision of the through holes as rectangular holes is only one specific embodiment of the present invention, and in practical application, the through holes may be provided as holes of other shapes such as round holes.
Further, the invention discloses a radiator which comprises a supporting frame and radiating pipes 44A, wherein the number of the radiating pipes 44A is multiple, the radiating pipes are arranged on the supporting frame at intervals, the bottom end of the supporting frame is detachably fixed at the top end of a base through bolts and the like, and the supporting frame is of a cylindrical structure with no cover at the top end and the bottom end. Both ends of the radiating pipe 44A communicate with both ends of the rotor axial air duct 42A, respectively.
Specifically, the heat dissipation tube 44A is an aluminum tube, a copper tube, or the like, which facilitates heat dissipation.
Further, the present invention discloses that the rotor assembly 4 further comprises a rotor cooling fan 45, wherein the rotor cooling fan 45 is sleeved outside the rotating shaft 41 and is used for sucking the air on one side of the rotor axial air duct 42A into the other side and flowing through the stator end coil 5 and the cooler channel into one side of the rotor axial air duct 42A.
Further, the invention discloses that the machine base 33 is provided with a vent hole 33A for allowing gas to flow through the cooler 44, the inner wall surface of the top wall of the machine base 33 for installing the cooler 44 and the stator lamination 31 are surrounded to form a second gap air channel 31E, the second gap air channel 31E is communicated with the vent hole 33A, one end of the second gap air channel 31E is communicated with the outlet of the channel of the first machine base 33, and the other end of the second gap air channel is closed and blocked.
Specifically, the number of the second clearance air channels 31E is 2.
In some embodiments, the present disclosure discloses that the cross section of the second gap wind tunnel 31E is larger than the cross section of the first gap wind tunnel 31A.
The heat dissipation process of the rotor assembly 4 is as follows: the totally-enclosed self-ventilation traction motor rotates to drive the coaxially installed rotor cooling fan 45 to rotate at a high speed, internal air is sucked from the inlet of the rotor axial air duct 42A, flows through the rotor cooling fan 45 and through holes at the right end part above the engine base 33, enters the radiating tube 44A of the cooler 44, flows out along the through holes at the left end part above the engine base 33, and returns to the left side of the rotor axial air duct 42A to complete circulation. The heat of the permanent magnets 43 is conducted to the rotor lamination 42 and enters the rotor axial air duct 42A of the rotor lamination yoke, the upper end through hole of the housing 33, and the heat radiating pipe 44A of the cooler 44 together with the heat of the rotor lamination 42. The heat radiating pipe 44A convects heat with the internal air, and heat is conducted to the outside of the heat radiating pipe 44A, and the outside of the heat radiating pipe 44A convects heat with the cooling air to transfer heat into the cooling air. In addition, during the heat dissipation of the stator assembly 3, a part of the cooling air enters the second gap passage and enters the support frame through the ventilation hole 33A, and the heat dissipated from the heat dissipating tube 44A is taken into the outside air, thereby cooling the heat dissipating tube 44A.
A second aspect of the invention provides a vehicle comprising a fully enclosed self-ventilating traction motor as in any of the embodiments described above.
Because the vehicle provided by the invention comprises the totally-enclosed self-ventilation traction motor in any embodiment, the totally-enclosed self-ventilation traction motor has the beneficial effects that the vehicle disclosed by the invention comprises.
The terms indicating the orientation, such as up, down, left, and right, in this description are all set in the direction shown in fig. 1, and are merely for convenience of description and do not have any particular meaning.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims (12)

1. The fully-closed self-ventilation traction motor is characterized by comprising a front bearing assembly, a rear end bearing assembly, a stator assembly and a rotor assembly;
the front bearing assembly and the rear bearing assembly can rotatably support the rotor assembly, and two ends of the stator assembly are respectively and fixedly connected with the front bearing assembly and the rear bearing assembly in a sealing way and are enclosed to form a closed cavity for accommodating the rotor assembly;
the front bearing assembly, the rear bearing assembly and the stator assembly are respectively provided with a first outer cooling air channel, a second outer cooling air channel and a third outer cooling air channel, both ends of which are communicated with outside air, and the first outer cooling air channel, the second outer cooling air channel and the third outer cooling air channel are respectively used for cooling the front bearing assembly, the rear bearing assembly and the stator assembly;
an inner cooling air duct communicated with the closed cavity is formed on the rotor assembly, and the inner cooling air duct and the closed cavity form an inner circulating air duct for circulating cooling so as to cool the rotor assembly and a stator end coil extending into the inner circulating air duct.
2. The fully enclosed self-ventilating traction motor of claim 1, wherein the front bearing assembly comprises a front bearing, a front end cap, and a front bearing chamber;
the inner ring of the front bearing is rotatably connected with the rotor assembly, the front bearing chamber is connected with the outer ring of the front bearing, and the front end cover is connected with the end of the front bearing chamber away from the rear end bearing assembly;
the first external cooling air duct comprises a front bearing chamber air duct and a front end cover air duct, the front bearing chamber air duct is arranged on the front bearing chamber, the front end cover air duct is arranged on the front end cover, the inlet of the front bearing chamber air duct is communicated with the outside air, the outlet of the front bearing chamber air duct is communicated with the inlet of the front end cover air duct, and the outlet of the front end cover air duct is communicated with the outside air.
3. The totally enclosed self-ventilation traction motor according to claim 2, wherein a first heat dissipation fin is arranged on the front end cover, a second heat dissipation fin is arranged on the front bearing chamber, and external air flows through the first heat dissipation fin and the second heat dissipation fin into the first external cooling air duct;
a front bearing cooling fan is coaxially arranged on one side of the front bearing chamber, which is away from the end face of the rotor assembly, and is used for sucking outside air into the first outer cooling air duct;
the front end cover is provided with a front air inlet cover buckled with the first outer cooling air duct and the front bearing cooling fan;
the front end cover air duct is a U-shaped air duct.
4. The fully enclosed self-ventilating traction motor of claim 1, wherein the rear bearing assembly comprises a rear bearing, a rear end cap, and a rear bearing chamber;
the inner ring of the rear bearing is rotatably connected with the rotor assembly, the rear bearing chamber is connected with the outer ring of the rear bearing, and the rear end cover is connected with the end, far away from the rear end bearing assembly, of the rear bearing chamber;
the second external cooling air duct comprises a rear bearing chamber air duct and a rear end cover air duct, the rear bearing chamber air duct is arranged on the rear bearing chamber, the rear end cover air duct is arranged on the rear end cover, the inlet of the rear end cover air duct is communicated with the outside air, the outlet of the rear end cover air duct is communicated with the inlet of the rear bearing chamber air duct, and the outlet of the rear bearing chamber air duct is communicated with the outside air.
5. The totally enclosed self-ventilating traction motor as set forth in claim 4, wherein a rear bearing cooling fan is coaxially installed at one side of the end face of the rear bearing chamber facing away from the rear end cover for sucking outside air into the second outside cooling air duct, a cooling fan axial air duct having an inlet communicating with an outlet of the rear bearing chamber air duct is provided on the rear bearing cooling fan, and an outlet of the cooling fan axial air duct is communicated with outside air;
the rear end cover is provided with a rear air inlet cover buckled with the second outer cooling air duct and the rear bearing cooling fan;
the air duct of the rear end cover is an L-shaped air duct.
6. The fully enclosed self-ventilating traction motor as defined in any one of claims 1-5, wherein the stator assembly comprises a stator lamination, a stator coil, and a housing;
the two ends of the stand are respectively connected with the front bearing assembly and the rear bearing assembly in a sealing way;
the stator lamination is stacked in the machine base, and stator slots for installing stator coils are formed in the stator lamination;
the third cooling air duct comprises a stator axial air duct, a first machine base axial air duct and a second machine base axial air duct, the stator axial air duct is arranged on the stator lamination, and the first machine base axial air duct and the second machine base axial air duct are both arranged on the machine base;
the two ends of the stator axial air channel are respectively communicated with the outlet of the first machine seat axial air channel and the inlet of the second machine seat axial air channel, and the inlet of the first machine seat axial air channel and the outlet of the second machine seat axial air channel are respectively communicated with the outside air.
7. The fully enclosed self-ventilating traction motor of claim 6, wherein the inlet of the first housing axial air duct is in communication with the inlet of the rear end cap air duct;
and/or
The third cooling air duct further comprises a first gap air duct formed by gaps between the stator laminations and the inner wall of the machine base, one end of the first gap air duct is communicated with the outlet of the first machine base axial air duct, and the other end of the first gap air duct is communicated with the inlet of the second machine base axial air duct.
8. The totally enclosed self-ventilating traction motor of claim 6, wherein the rotor assembly comprises a shaft, rotor laminations, permanent magnets, and a cooler;
the rotor lamination is stacked on the rotating shaft, permanent magnet grooves for mounting the permanent magnets are formed in the rotor lamination, and the cooler is mounted on the base;
the inner cooling air duct comprises a rotor axial air duct, the rotor axial air duct is arranged on the rotor lamination, a cooler channel is arranged on the cooler, through holes which are respectively communicated with the two ends of the cooler channel are arranged on the machine base, and the two ends of the cooler channel are respectively communicated with the two ends of the rotor axial air duct through the through holes.
9. The fully enclosed self-ventilating traction motor of claim 8, wherein the rotor assembly includes a rotor cooling fan;
the rotor cooling fan is sleeved outside the rotating shaft and used for sucking air on one side of the rotor axial air duct into the other side, and the air flows through the stator end coil and the cooler channel to enter one side of the rotor axial air duct.
10. The totally enclosed self-ventilating traction motor as set forth in claim 8, wherein said housing is provided with vents allowing air to flow through said cooler;
the machine base is used for installing the inner wall surface of the top wall of the cooler and the stator lamination enclose to form a second clearance air channel communicated with the ventilation hole, one end of the second clearance air channel is communicated with the outlet of the first machine base channel, and the other end of the second clearance air channel is closed and cut off.
11. The fully enclosed self-ventilating traction motor of claim 10, wherein the cross-section of the second gap wind tunnel is greater than the cross-section of the first gap wind tunnel.
12. A vehicle comprising a totally enclosed self-ventilating traction motor as in any one of claims 1-11.
CN202111648397.1A 2021-12-29 2021-12-29 Totally-enclosed self-ventilation traction motor and vehicle Pending CN116418163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111648397.1A CN116418163A (en) 2021-12-29 2021-12-29 Totally-enclosed self-ventilation traction motor and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111648397.1A CN116418163A (en) 2021-12-29 2021-12-29 Totally-enclosed self-ventilation traction motor and vehicle

Publications (1)

Publication Number Publication Date
CN116418163A true CN116418163A (en) 2023-07-11

Family

ID=87051489

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111648397.1A Pending CN116418163A (en) 2021-12-29 2021-12-29 Totally-enclosed self-ventilation traction motor and vehicle

Country Status (1)

Country Link
CN (1) CN116418163A (en)

Similar Documents

Publication Publication Date Title
JP5629828B2 (en) Rotating electric machine
WO2021114606A1 (en) Air- and water-cooled high-power permanent magnet traction motor having a hanging structure
US8198765B2 (en) Motor assembly with a thermally conductive bridging member
KR101131534B1 (en) Arrangement and method for cooling an electrical machine
US6633098B2 (en) Alternator for use in a vehicle
US8648505B2 (en) Electrical machine with multiple cooling flows and cooling method
US6909211B2 (en) Rotary electric machine with forced ventilation
CN108880104B (en) Permanent magnet motor cooling system for railway vehicle
JP2014033584A (en) Wind cooling structure of rotary electric machine
CN112186952B (en) Permanent magnet traction motor
CN211508791U (en) Motor casing and motor using same
CN109904985A (en) A kind of built-in iron-core-free disc motor to radiate
CN104682623B (en) Series excited machine
JP2008220054A (en) Vehicle driving totally-enclosed motor
EP2587640B1 (en) Fully closed horizontal dynamo-electric machine
JP4891656B2 (en) Fully enclosed motor for vehicles
CN218771544U (en) Bearing frame, motor and unmanned aerial vehicle of motor
CN116418163A (en) Totally-enclosed self-ventilation traction motor and vehicle
CN215934547U (en) Motor and electrical equipment
CN219420500U (en) Internal circulation air-cooling heat dissipation structure of motor
CN116418147A (en) Totally-enclosed traction motor and vehicle
CN211183621U (en) Noise-reduction heat dissipation structure of motor shell
JP2020145834A (en) Motor frame structure and motor
CN114069938A (en) Water-gas composite cooling motor structure and new energy automobile using same
CN112383173B (en) Permanent magnet synchronous motor with rotor cooling structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination