CN113824231B - Semi-closed forced air cooling motor - Google Patents

Semi-closed forced air cooling motor Download PDF

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Publication number
CN113824231B
CN113824231B CN202111107445.6A CN202111107445A CN113824231B CN 113824231 B CN113824231 B CN 113824231B CN 202111107445 A CN202111107445 A CN 202111107445A CN 113824231 B CN113824231 B CN 113824231B
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China
Prior art keywords
air
air duct
bearing
rotor
end cover
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Active
Application number
CN202111107445.6A
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Chinese (zh)
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CN113824231A (en
Inventor
郑国丽
张道禄
丰帆
申政
崔可
何维林
周茜茜
王韬
汤黎明
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CRRC Zhuzhou Electric Co Ltd
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CRRC Zhuzhou Electric Co Ltd
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Priority to CN202111107445.6A priority Critical patent/CN113824231B/en
Publication of CN113824231A publication Critical patent/CN113824231A/en
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    • 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
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • 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
    • H02K5/20—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
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • 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)
  • Motor Or Generator Frames (AREA)

Abstract

The invention discloses a semi-closed forced air cooling motor which comprises a base, a rotor, a stator, a bearing assembly and an end cover assembly, wherein the rotor comprises a rotating shaft and magnetic steel, the magnetic steel is provided with a first air channel along the axial direction, the base is provided with a second air channel for cooling the stator along the axial direction, and the base is provided with an air inlet for communicating the first air channel and the second air channel; the inner side of the end cover assembly is provided with a shell-shaped bearing baffle at a preset interval, the rotating shaft penetrates through the bearing baffle, a third air duct used for cooling the end part of the rotor and the bearing assembly is formed between the bearing baffle and the end cover assembly, and the third air duct is communicated with the outside. The semi-closed forced air cooling motor provided by the invention can effectively reduce the problem of temperature rise in the motor and prolong the service life of the motor.

Description

Semi-closed forced air cooling motor
Technical Field
The invention relates to the field of motors, in particular to a semi-closed forced air cooling motor.
Background
The forced air cooling motor is supplied with air by an external cooling system, and cooling media enter the motor from an air inlet of the motor, flow through the stator and the rotor and the ventilation duct respectively and flow out from an air outlet, so that heat inside the motor is taken away. The cooling medium absorbs heat along the way, the temperature is gradually increased, the integral axial temperature distribution of the motor is uneven, the temperature difference between an inlet and an outlet is large, and partial heat is transferred to the rear bearing through the cooling medium and the rotating shaft, so that the rear bearing exceeds the allowable temperature of the bearing, and the service life of the bearing is reduced or damaged. In addition, the ventilation structure is mainly used for a permanent magnet motor, and the temperature rise of a rotor of the permanent magnet motor can directly cause the demagnetization of a permanent magnet, so that the temperature rise of magnetic steel of the rotor is an important assessment index.
How to reduce the temperature rise inside the motor becomes a technical problem to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a semi-closed forced air cooling motor which can effectively reduce the problem of temperature rise in the motor and prolong the service life of the motor.
In order to achieve the purpose, the invention provides a semi-closed forced air cooling motor which comprises a base, a rotor, a stator, a bearing assembly and an end cover assembly, wherein the rotor comprises a rotating shaft and magnetic steel, a first air channel is formed in the axial direction of the magnetic steel, a second air channel for cooling the stator is formed in the axial direction of the base, and an air inlet communicated with the first air channel and the second air channel is formed in the base; the inner side of the end cover assembly is provided with a shell-shaped bearing baffle at a preset interval, the rotating shaft penetrates through the bearing baffle, a third air duct used for cooling the end part of the rotor and the bearing assembly is formed between the bearing baffle and the end cover assembly, and the third air duct is communicated with the outside.
Optionally, the end cover assembly includes a front end cover and a rear end cover, the bearing assembly includes a front bearing and a rear bearing, the air inlet is disposed at one end of the base close to the front end cover, and the bearing baffle is disposed at the rear end cover.
Optionally, rotor pressing rings are arranged at two ends of the magnetic steel, and a front baffle is arranged at one end, close to the front end cover, of the inner cavity of the base; one end of the front baffle is fixedly connected with the inner wall of the machine base, and the other end of the front baffle is perpendicular to the rotor pressing ring at a preset interval.
Optionally, a rear baffle is arranged at one end, close to the rear end cover, of the inner cavity of the machine base; one end of the rear baffle is fixedly connected with the inner wall of the machine base or the rear end cover, and the other end of the rear baffle is perpendicular to the rotor pressing ring at a preset interval.
Optionally, an induced air duct is formed in the base along the axial direction, a sealing cover is arranged on the outer side of the rear end cover, a communicating duct communicating the induced air duct with the third duct is formed between the sealing cover and the rear end cover, and the induced air duct is connected with the air inlet.
Optionally, an annular groove is formed in an outer end surface of the rotor pressing ring, and the tail ends of the front baffle and the rear baffle are arranged in the corresponding annular grooves.
Optionally, the rear end cover is provided with a bearing air duct air inlet for connecting the third air duct and the communication air duct, and a plurality of groups of bearing air duct air outlets for communicating the outside with the third air duct, and all the bearing air duct air inlets and the bearing air duct air outlets are located on the circumference of the same preset radius.
Optionally, the sealing covers or the communicating air ducts are arranged in two groups at 90-degree included angles.
Optionally, the rear end cover is provided with a plurality of groups of rotor air duct air outlets connected to the air duct between the bearing baffle and the rear baffle.
Optionally, the bearing baffle is a truncated cone-shaped housing, and the truncated cone-shaped housing is welded and fixed with the rear end cover.
Compared with the background technology, the semi-closed forced air cooling motor provided by the invention supplies air through the air inlet, the cooling air enters the first air channel to cool the rotor along the axial direction of the rotor, and the cooling air enters the second air channel to cool the stator along the axial direction of the stator; in addition, for the cooling wind of avoiding first wind channel because of along the cooling of rotor axial, the temperature risees the back and acts on terminal and the bearing assembly of rotor, lead to terminal and the bearing assembly cooling of rotor not enough, this application sets up the bearing baffle in the inner chamber of frame, the hot-blast isolation after the bearing baffle will heat up, the bearing baffle cooperates the end cover subassembly to form the third wind channel simultaneously, utilize the third wind channel to carry out abundant cooling to the terminal and the bearing assembly of rotor especially pivot, reduce the pivot and to the heat conduction of bearing assembly, avoided the bearing assembly overtemperature. This closed forced air cooling motor that this application provided can carry out abundant ability but to rotor, stator and the bearing subassembly of motor, avoids motor overtemperature to lose magnetism or bearing subassembly damage influence motor life.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a cross-sectional view of a semi-enclosed forced air cooling motor according to an embodiment of the present invention;
fig. 2 is a right side view of fig. 1.
Wherein:
1-air inlet, 2-rotor air inlet, 3-front baffle, 4-rotor pressing ring, 5-first air duct, 6-stator, 7-rotor, 8-induced air duct, 9-machine base, 10-closed space, 11-sealing cover, 12-communicated air duct, 13-rear baffle, 14-rear end cover, 15-bearing air duct air inlet, 16-bearing baffle, 17-rear bearing, 18-rotating shaft, 19-third air duct, 20-bearing air duct air outlet, 21-rotor air duct air outlet, 22-second air duct, 23-stator air duct air outlet and 24-induced air duct air outlet.
Detailed Description
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.
It should be noted that the motor generally includes a transmission end and a non-transmission end, the transmission end is used to drive the rotation mechanism to rotate through the transmission assembly, for the purpose of distinguishing, the term "rear" or "rear end" is used herein to refer to an end near the transmission end, and the term "front" or "front end" refers to an end near the non-transmission end.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and fig. 2, fig. 1 is a sectional view of a semi-enclosed forced air cooling motor according to an embodiment of the present invention, and fig. 2 is a right side view of fig. 1.
The semi-closed forced air cooling motor provided by the invention comprises a base 9, a rotor 7, a stator 6, a bearing assembly and an end cover assembly, wherein the end cover assembly is matched with the base 9 to form a cavity for packaging the rotor 7 and the stator 6, two ends of the rotor 7 are supported by the bearing assembly, and a bearing seat provided with the bearing assembly is fixedly connected with an end cover. In order to realize the sufficient cooling of the interior of the motor, the semi-closed forced air cooling motor comprises an air inlet 1, wherein the air inlet 1 is connected with a first air duct 5 and a second air duct 22.
The first air duct 5 is arranged on the magnetic steel of the rotor 7 and is arranged along the axial direction of the rotor 7, so that the rotor 7 can be cooled along the axial direction, the temperature rise of the rotor magnetic steel and the rotating shaft 18 is reduced, and the first air duct 5 is used for cooling the rotor 7, so that the first air duct is also called as a rotor air duct; the second air duct 22 is provided on the base 9 in the axial direction of the base 9, preferably such that a partial section of the stator 6 serves as an inner wall of the second air duct 22, so that the cooling air of the second air duct 22 sufficiently exchanges heat with the stator 6 in a convection manner, and the second air duct 22 is used for cooling the stator 6, and thus also becomes a stator air duct.
In addition, a third air duct 19 is further arranged in the motor, and the third air duct 19 is formed by matching a bearing baffle 16 arranged at a preset distance on the inner side of the end cover assembly with the end cover assembly; the bearing baffle 16 is in a housing shape, an annular third air duct 19 is formed by the matching end cover assembly, the third air duct 19 is communicated with the outside to directly cool the bearing assembly and the tail end of the rotor 7, and the third air duct 19 is also called a bearing cooling air duct or a bearing ventilation duct.
The third air duct 19 has the advantages that the bearing assembly can be cooled by cooling the bearing seat fixedly connected with the end cover assembly, the tail end of the rotor 7 can be cooled, heat conducted from the rotor 7 to the bearing assembly is reduced, and meanwhile, air flow of the third air duct 19 can cool the bearing assembly along a gap between the rotating shaft 18 of the rotor 7 and the bearing seat; and bearing baffle 16's setting can be with first wind channel 5 along the axial cooling and the hot-blast isolation that heaies up rotor 7, and cooperation end cover subassembly forms third wind channel 19 so that utilize microthermal cooling wind to cool off the bearing subassembly, is showing and has promoted the cooling effect to the bearing subassembly, has guaranteed to carry out abundant even cooling, extension motor life to motor inside.
In the specific embodiment provided by the present invention, the bearing assembly includes a front bearing and a rear bearing 17, the end cover assembly correspondingly includes a front end cover and a rear end cover 14, the air inlet 1 is specifically disposed on the outer wall of the end of the base 9 close to the front end cover, a part of the cooling air entering the motor through the air inlet 1 flows to the second air duct 22 to cool the stator 6, the other part of the cooling air enters the cavity of the base 9 through the air inlet 15 of the bearing air duct at the front end of the base 9 to cool the front end of the rotor 7 and the front bearing, and enters the first air duct 5 to cool the magnetic steel of the rotor 7 and the rotating shaft 18, and finally, the cooling air is discharged out of the base 9. Since the cooling air cools the front bearing before entering the first air duct 5, and the cooling air flows from the front end cover to the rear end cover 14 along the second air duct 22, the temperature of the cooling air of the rear end cover 14 is high, which results in poor cooling effect of the rear bearing 17, only the bearing baffle 16 is disposed at the rear end cover 14.
Alternatively, the bearing baffle 16 may be designed as a truncated cone-shaped housing, the bottom surface of which is open, the bottom of the side surface of which is welded and fixed to the rear end cap 14, and the center of the top surface of which is provided with a through hole for the rotating shaft 18 to pass through, the size of the through hole being slightly larger than the diameter of the end of the rotating shaft 18, so as to prevent the bearing baffle 16 from rubbing against the rotating shaft 18 when the rotor 7 rotates. In order to realize the air supply cooling and the air exhaust of the third air duct 19, the rear end cover 14 may be provided with a bearing air duct air inlet 15 and a bearing air duct air outlet 20, and cooling air is supplied through the bearing air duct air inlet 15, cools the rotor 7 and the rear bearing 17, and is then discharged through the bearing air duct air outlet 20. The bearing air duct air inlet 15 and the bearing air duct air outlet 20 are arranged in multiple groups and are preferably arranged on the circumference of the same preset radius, so that the uniformity of air supply and air exhaust is improved, and the uniformity of cooling the rear bearing 17 is improved.
The first air duct 5 is uniformly provided with a plurality of groups along the circumferential direction of the magnetic steel of the rotor 7, cooling air entering the first air duct 5 from the air inlet 1 and the rotor air inlet 2 flows to the rear end cover 14 along the front end cover and then is discharged out of the motor after cooling the rotor 7, for facilitating hot air discharge, the rear end cover 14 is provided with a plurality of groups of rotor air duct air outlets 21, the plurality of groups of rotor air duct air outlets 21 are uniformly arranged on the circumference with the same radius, and the rotor air duct air outlets 21 are positioned at the peripheries of the bearing air duct air inlets 15 and the bearing air duct air outlets 20. A plurality of groups of second air ducts 22 are formed along the outer circumference of the base 9 so as to uniformly cool the stator 6, and a stator air duct air outlet 23 is formed at the tail end of each second air duct 22 so as to discharge cooling air after cooling the stator 6.
In a preferred embodiment provided by the present invention, in order to facilitate air supply to the inside of the motor, the present application particularly provides an induced air duct 8 along the axial direction of the base 9, and a sealing cover 11 is disposed on the outer side of the rear end cover 14, and the sealing cover 11 cooperates with the rear end cover 14 to form a communicating air duct 12 connecting the induced air duct 8 and the third air duct 19. Therefore, when air is supplied to the air inlet 1, the cooling air of the air supply opening can simultaneously flow to the first air duct 5, the second air duct 22 and the third air duct 19, and the convenience of supplying air to the inside of the motor is improved. It should be emphasized that the structure of the induced air duct 8 is preferably identical to that of the second air duct 22, and the difference is only that the end of the induced air duct 8 is provided with a communicating air duct 12 formed by a sealing cover 11 and a rear end cover 14, the air duct structures formed by the induced air duct 8 and the second air duct 22 are uniformly distributed along the circumferential direction of the machine base 9, and the communicating air duct 12 covers and communicates the induced air duct air outlet 24 and the bearing air duct air inlet 15. The sealing covers 11 and the communicating air ducts 12 can be arranged in two groups with reference to fig. 2, and are arranged at an angle of 90 degrees with each other.
The arrangement of the induced air duct 8 and the communication air duct 12 not only facilitates one-time air supply through the air inlet 1, improves the cooling uniformity of the stator 6, but also fully considers the cooling temperature difference of the tail end of the rotor 7, and avoids the problem that the thermal strain of the rotating shaft 18 is uneven due to too large cooling air temperature difference of the tail end of the first air duct 5 and the third air duct 19. The cooling air entering the third air duct 19 cools the stator 6 before entering the third air duct 19, that is, when flowing through the induced air duct 8, and the cooling air has a certain temperature rise, so that the temperature difference between the cooling air in the third air duct 19 and the cooling air at the end of the first air duct 5 is reduced. Because the induced air duct 8 cools the stator 6 from the outside of the stator 6, the temperature of the whole cooling air flowing through the induced air duct 8 and entering the third air duct 19 is still lower than the temperature of the cooling air flowing through the first air duct 5 to the tail end of the stator 6, and therefore the arrangement of the third air duct 19 can effectively improve the cooling of the rear bearing 17.
In a further embodiment, in order to prevent the cooling air entering the inner cavity of the motor from flowing to the air gap between the stator 6 and the rotor 7, and causing dust impurities to enter the air gap between the stator 6 and the rotor 7, the semi-closed forced air cooling motor provided by the present application further comprises a front baffle 3 arranged on the inner wall of the base 9. Rotor magnet steel's both ends set up rotor clamping ring 4, preceding baffle 3 is the annular shell form, the perpendicular rigid coupling of one end at frame 9 of preceding baffle 3 is at the inner wall, the other end sets up towards the outer terminal surface of rotor clamping ring 4 perpendicularly, cooling air gets into behind the motor inner chamber through air intake 1 and rotor air intake 2, because preceding baffle 3's isolation, cooling air can only flow along first wind channel 5, and can't get into and shelter from confined air gap by preceding baffle 3, avoided the cooling air to carry impurity damage winding.
Preferably, an annular groove is formed in the outer end face of the rotor pressing ring 4, the depth direction of the annular groove is overlapped with the axial direction of the rotor 7, the tail end of the front baffle 3 is arranged in the annular groove, certain gaps are formed between the tail end of the front baffle 3 and the side wall and the bottom of the annular groove, the groove of the rotor pressing ring 4 and the tail end of the front baffle 3 are matched to form labyrinth seal, and meanwhile normal rotation of the rotor 7 is not affected.
Similarly, a rear baffle 13 is arranged in an inner cavity at the rear end of the machine base 9, one end of the rear baffle 13 is matched and sealed with the rotor pressing ring 4 in a way of referring to the front baffle 3 and the rotor pressing ring 4; the other end of the rear baffle 13 is fixedly connected to the inner wall of the machine base 9 or the inner end surface of the rear end cover 14. The front baffle 3, the rear baffle 13, the inner wall of the machine base 9 and the rotor 7 are matched to form a closed space 10 for sealing an air gap between the rotor 7 and the stator 6, so that impurities are prevented from entering the air gap to damage the insulation of the motor. An air duct communicating the first air duct 5 and the rotor air duct air outlet 21 is formed between the rear baffle 13 and the bearing baffle 16, so that cooling air for cooling the rotor 7 can be smoothly discharged.
It should be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The semi-closed forced air cooling motor provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (5)

1. A semi-closed forced air cooling motor comprises a base, a rotor, a stator, a bearing assembly and an end cover assembly, wherein the rotor comprises a rotating shaft and magnetic steel; a shell-shaped bearing baffle plate is arranged at the inner side of the end cover assembly at a preset interval, the rotating shaft penetrates through the bearing baffle plate, a third air duct for cooling the end part of the rotor and the bearing assembly is formed between the bearing baffle plate and the end cover assembly, and the third air duct is communicated with the outside;
the end cover assembly comprises a front end cover and a rear end cover, the bearing assembly comprises a front bearing and a rear bearing, the air inlet is formed in one end, close to the front end cover, of the base, and the bearing baffle is arranged on the rear end cover; rotor pressing rings are arranged at two ends of the magnetic steel, and a front baffle is arranged at one end, close to the front end cover, of the inner cavity of the machine base; one end of the front baffle is fixedly connected with the inner wall of the machine base, and the other end of the front baffle is arranged perpendicular to the rotor pressing ring at a preset interval; a rear baffle is arranged at one end, close to the rear end cover, of the inner cavity of the machine base; one end of the rear baffle is fixedly connected with the inner wall of the machine base or the rear end cover, and the other end of the rear baffle is arranged perpendicular to the rotor pressing ring at a preset interval; the front baffle, the rear baffle, the inner wall of the engine base and the rotor are matched to form a closed space for sealing an air gap between the rotor and the stator;
an induced air duct is formed in the machine base along the axial direction, a sealing cover is arranged on the outer side of the rear end cover, a communicating air duct communicated with the induced air duct and the third air duct is formed between the sealing cover and the rear end cover, and the induced air duct is connected with the air inlet;
the rear end cover is provided with a bearing air duct air inlet for connecting the third air duct and the communication air duct and a plurality of groups of bearing air duct air outlets for communicating the outside with the third air duct, and all the bearing air duct air inlets and the bearing air duct air outlets are positioned on the circumference of the same preset radius.
2. A semi-enclosed forced air cooled machine as claimed in claim 1 wherein the outer end face of said rotor clamping ring is provided with an annular groove, and the ends of said front and back baffles are disposed in the corresponding annular grooves.
3. A semi-enclosed forced air cooled machine according to claim 1 wherein said sealing covers or said communicating ducts are arranged in two sets spaced at 90 ° angles.
4. A semi-enclosed forced air cooled machine according to claim 1 wherein the rear end cap is provided with a plurality of sets of rotor air duct outlets connected to the air duct between the bearing shield and the rear shield.
5. A semi-enclosed forced air cooling motor according to claim 4, wherein said bearing baffle is a truncated cone shaped housing, and said truncated cone shaped housing is welded to said rear end cap.
CN202111107445.6A 2021-09-22 2021-09-22 Semi-closed forced air cooling motor Active CN113824231B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111107445.6A CN113824231B (en) 2021-09-22 2021-09-22 Semi-closed forced air cooling motor

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Application Number Priority Date Filing Date Title
CN202111107445.6A CN113824231B (en) 2021-09-22 2021-09-22 Semi-closed forced air cooling motor

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CN113824231A CN113824231A (en) 2021-12-21
CN113824231B true CN113824231B (en) 2023-03-10

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0393441A (en) * 1989-09-04 1991-04-18 Toshiba Corp Ventilation cooling electric rotary machine for vehicle
JP2001178079A (en) * 1999-12-20 2001-06-29 Mitsubishi Electric Corp Forced cooling type totally enclosed dynamo-electric machine
JP2003189545A (en) * 2001-12-20 2003-07-04 Toyo Electric Mfg Co Ltd Main motor for vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0393441A (en) * 1989-09-04 1991-04-18 Toshiba Corp Ventilation cooling electric rotary machine for vehicle
JP2001178079A (en) * 1999-12-20 2001-06-29 Mitsubishi Electric Corp Forced cooling type totally enclosed dynamo-electric machine
JP2003189545A (en) * 2001-12-20 2003-07-04 Toyo Electric Mfg Co Ltd Main motor for vehicle

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