CN109292596A - A kind of elevator traction machine - Google Patents
A kind of elevator traction machine Download PDFInfo
- Publication number
- CN109292596A CN109292596A CN201811234520.3A CN201811234520A CN109292596A CN 109292596 A CN109292596 A CN 109292596A CN 201811234520 A CN201811234520 A CN 201811234520A CN 109292596 A CN109292596 A CN 109292596A
- Authority
- CN
- China
- Prior art keywords
- rotor
- traction machine
- flabellum
- heat dissipation
- dissipation channel
- 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
Links
- 241000883990 Flabellum Species 0.000 claims abstract description 46
- 230000017525 heat dissipation Effects 0.000 claims abstract description 39
- 238000009423 ventilation Methods 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 11
- 238000004804 winding Methods 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000013019 agitation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001075561 Fioria Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/04—Driving gear ; Details thereof, e.g. seals
- B66B11/043—Driving gear ; Details thereof, e.g. seals actuated by rotating motor; Details, e.g. ventilation
-
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a kind of elevator traction machines, including base, the stator being arranged in the base, the rotor matched with the stator, traction sheave and rotation axis, one end of the rotation axis is connected with the rotor, the other end of the rotation axis is connected with the traction sheave, the rotor is provided with flabellum on the end face far from the traction sheave, the base is equipped with connecting plate far from the side of the traction sheave, is offered on the connecting plate for supplying the ventilation opening flowed into or out.Elevator traction machine of the invention it is reasonable in design, by the way that flabellum is arranged on rotor, so that flabellum, which follows, to be rotated together when rotor rotation, stir the air inside traction machine, the displacement of air between increase traction machine is inside and outside, continually introduces the cold air of outside, and the hot-air inside traction machine is discharged, to take away the heat in traction machine, the temperature in traction machine is reduced, achievees the purpose that heat dissipation reduces winding temperature rise, improves electric efficiency.
Description
Technical field
The present invention relates to traction machine technical fields, and in particular to one kind is capable of the elevator traction machine of rapid cooling.
Background technique
As the rapid development of social economy and the continuous improvement of lives of the people level, elevator have become in daily life
One indispensable part, the quality requirement to elevator components are also higher and higher.
The heat dissipation of traction machine at present relies primarily on the natural heat dissipation of base and the exposed aerial outer surface of rotor, internal
Hot-air can not active be discharged to outside casing, cause internal temperature excessively high, and then winding resistance is caused to increase, copper consumption increases
Add, electric efficiency is lower, wastes electric power resource.
Summary of the invention
In view of this, in order to overcome the drawbacks of the prior art, the present invention provides it is a kind of it is reasonable in design, can be quick
The elevator traction machine to radiate.
In order to achieve the above object, the following technical solution is employed by the present invention:
A kind of elevator traction machine including base, the stator being arranged in the base, the rotor matched with the stator, drags
Running wheel and rotation axis, one end of the rotation axis are connected with the rotor, and the other end of the rotation axis is connected with described drag
Running wheel, the rotor are provided with flabellum on the end face far from the traction sheave, the base is pacified far from the side of the traction sheave
Equipped with connecting plate, offered on the connecting plate for supplying the ventilation opening flowed into or out.By the way that flabellum is arranged on rotor, so that
Rotor rotation when, flabellum, which follows, to be rotated together, stir traction machine inside air, increase traction machine it is inside and outside it
Between air displacement, continually introduce outside cold air, by inside traction machine hot-air be discharged, to take away in traction machine
Heat reduces the temperature in traction machine.
Preferably, the flabellum is uniformly distributed on end face of the rotor far from the traction sheave, and the flabellum passes through
Bolt assembly or screw assembly are fixed on the rotor.Equally distributed flabellum is more conducive to generating bigger air-flow, adds
The displacement of fast traction machine inner air and outer air.
Preferably, the flabellum includes the interconnecting piece being attached with the rotor and the stopper for generating air-flow,
The interconnecting piece is tightly attached on the end face of the rotor, and the stopper intersects with the end face of the rotor.By the way that flabellum is installed
On the end face of rotor, any influence on the one hand will not be generated to rotor, have no need to change the size and mounting means of rotor,
It on the other hand is also the convection current for reinforcing air.
It is further preferred that the cross sectional shape of the flabellum is V-type, half V-type or L-type.Flabellum is arranged to symmetrical V-type,
No matter rotor main story or invert, can achieve the effect that and be the same.
Preferably, the flabellum is sheet metal component.Sheet metal process is a kind of synthesis cold machining process for sheet metal,
Significant feature is exactly Same Part consistency of thickness.So consistency of thickness everywhere in flabellum.
It is further preferred that the material of the flabellum is the zinc-plated carbon steel of stainless steel or surface, the service life is longer.
Preferably, the heat dissipation channel through its thickness direction is offered on the rotor, the heat dissipation channel is uniformly distributed
On the end face of the rotor.By opening up heat dissipation channel, so that the hot-air in rotor between traction sheave can also obtain
Effective displacement, more efficiently reduces the internal temperature of traction machine.
It is further preferred that the installation site of the flabellum is corresponding with the heat dissipation channel.Such setting can be more
The effective displacement for reinforcing traction machine inner air and outer air.
It is further preferred that the heat dissipation channel includes interior heat dissipation channel and outer heat dissipation channel, the interior heat dissipation channel and institute
That states outer heat dissipation channel opens up that position is corresponding, is more conducive to the displacement of hot-air between rotor and traction sheave.
Preferably, ventilating board is installed on the ventilation opening, offered on the ventilating board several for supply flow into
Ventilation hole out.By the way that ventilating board is arranged on ventilation opening, can have in the case where not influencing the displacement of traction machine inner air and outer air
Effect avoids some sundries, foreign matter etc. from entering in traction machine.
Compared with prior art, the invention has the beneficial effects that: elevator traction machine of the invention it is reasonable in design,
By the way that flabellum is arranged on rotor, so that flabellum, which follows, to be rotated together when rotor rotation, the sky inside traction machine is stirred
Gas, increase traction machine it is inside and outside between air displacement, continually introduce the cold air of outside, the heat inside traction machine is empty
Gas discharge reduces the temperature in traction machine to take away the heat in traction machine, achievees the purpose that heat dissipation reduces winding temperature rise,
Electric efficiency is improved, energy consumption is reduced.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the perspective view (not including connecting plate) of elevator traction machine in the preferred embodiment of the present invention；
Fig. 2 is the main view (not including connecting plate) of elevator traction machine in the preferred embodiment of the present invention；
Fig. 3 is the perspective view of elevator traction machine in the preferred embodiment of the present invention；
Fig. 4 is the perspective view at another visual angle of elevator traction machine in the preferred embodiment of the present invention；
Fig. 5 is the main view of elevator traction machine in the preferred embodiment of the present invention；
Fig. 6 is the perspective view of rotor in the preferred embodiment of the present invention；
Fig. 7 is the main view of rotor in the preferred embodiment of the present invention；
Fig. 8 is the cross-sectional view of A-A in Fig. 7；
Fig. 9 is the main view of connecting plate in the preferred embodiment of the present invention；
Figure 10 is the main view of flabellum in the preferred embodiment of the present invention；
Figure 11 is the sectional view of flabellum in the preferred embodiment of the present invention；
Figure 12 is the main view of flabellum in another preferred embodiment of the present invention；
Figure 13 is the sectional view of flabellum in another preferred embodiment of the present invention；
Figure 14 is the main view of flabellum in further embodiment of the present invention；
Figure 15 is the sectional view of flabellum in further embodiment of the present invention；
Wherein: base -1, traction sheave -2, rotor -3, interior heat dissipation channel -31, outer heat dissipation channel -32, reinforcing rib -33, through-hole -
34, flabellum -4, interconnecting piece -41, stopper -42, connecting plate -5, ventilation opening -51, mounting hole -52, ventilating board -6, magnetic coder -7.
Specific embodiment
In order that those skilled in the art will better understand the technical solution of the present invention, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment
Only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to protection of the present invention
Range.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Covering non-exclusive includes to be not necessarily limited to for example, containing the process, method of a series of steps or units, device, product or equipment
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
- Figure 11 referring to Fig.1, a kind of elevator traction machine of the present embodiment, including base 1, the stator being arranged in base 1,
Rotor 3, traction sheave 2 and the rotation axis and magnetic coder 7 matched with stator, one end of rotation axis are connected with rotor 3, rotation
The other end of axis is connected with traction sheave 2, and rotor 3 is provided with flabellum 4 on the end face far from traction sheave 2, base 1 is far from traction sheave 2
Side connecting plate 5 is installed, offered on connecting plate 5 for supplying the ventilation opening 51 flowed into or out.By flabellum 4 in traction machine
Agitation air when operation increases the convection current of air, reinforces the displacement of traction machine outside air, introduces external cold sky
Gas is discharged internal hot-air, achievees the purpose that cooling.
As shown in Fig. 1-2 and Fig. 6-8, the heat dissipation channel through its thickness direction is offered on the rotor 3 in the present embodiment,
Heat dissipation channel is evenly distributed on the end face of rotor 3, and heat dissipation channel includes interior heat dissipation channel 31 and outer heat dissipation channel 32, interior to dissipate
The passage of heat 31 is corresponding with the position of outer heat dissipation channel 32.By opening up heat dissipation channel, so that in rotor 3 between traction sheave 2
Hot-air also can effectively be replaced, more efficiently reduce traction machine internal temperature.
As shown in figs 6-8, the middle position of rotor 3 is also provided with the through-hole 34 with rotation axis connection, also around through-hole 34
It is provided with reinforcing rib 33, to further strengthen the intensity of rotor 3.Equally distributed 8 outer heat dissipation channels are set in the present embodiment
32, corresponding to be provided with 4 interior heat dissipation channel 31 and 4 piece reinforcing ribs 33, reinforcing rib 33 is arranged alternately with interior heat dissipation channel 31, i.e.,
Corresponding outer heat dissipation channel 32 and interior heat dissipation channel 31 or reinforcing rib 33 be located at circle it is same diametrically.
As shown in Figs. 1-2, flabellum 4 is uniformly distributed on end face of the rotor 3 far from traction sheave 2, and the installation site of flabellum 4
It is corresponding with heat dissipation channel.Equally distributed flabellum 4 is more conducive to generating bigger air-flow, accelerates traction machine inner air and outer air
Displacement.
As shown in Fig. 1-2 and Figure 10-11, flabellum 4 includes the interconnecting piece 41 being attached with rotor 3 and for generating gas
The stopper 42 of stream, interconnecting piece 41 are tightly attached on the end face of rotor 3, and stopper 42 intersects at an angle with the end face of rotor 3.This reality
It applies interconnecting piece 41 in example to be fixed on rotor 3 by bolt assembly or screw assembly, and bolt assembly or screw assembly are two groups,
One group of correspondence is installed on the top of outer heat dissipation channel 32, and another group of correspondence is installed on the lower section of outer heat dissipation channel 32.By that will fan
Leaf 4 is mounted on the end face of rotor 3, and any influence on the one hand will not be generated to rotor 3, haves no need to change the size of rotor 3
And mounting means, on the other hand it is also the convection current reinforced between air, accelerates heat dissipation.
Flabellum 4 is sheet metal component, and material is the zinc-plated carbon steel of stainless steel or surface, and the service life is longer.Sheet metal process is
A kind of synthesis cold machining process for sheet metal, significant feature are exactly Same Part consistency of thickness, so flabellum 4
Consistency of thickness everywhere.
As shown in Fig. 4-5 and Fig. 9, ventilating board 6 is installed on ventilation opening 51, several are offered on ventilating board 6 for supplying
The ventilation hole of air-flow disengaging.Ventilation opening 51 is symmetrical set on connecting plate 5, to facilitate the disengaging of air.By in ventilation opening
Ventilating board 6 is set on 51, can effectively avoid some sundries, foreign matter in the case where not influencing the displacement of traction machine inner air and outer air
Etc. entering in traction machine.
The cross sectional shape of flabellum 4 can be V-type, as shown in figs. 10-11；Or half V-type, as illustrated by figs. 12-13；Or L-type,
As shown in figs. 14-15.Flabellum 4 is arranged to symmetrical V-type in the present embodiment, no matter 3 main story of rotor or inverts, can reach
Effect be the same.It, can be by flabellum 4 in order to preferably reinforce the convection current between air in other some embodiments
Stopper 42 be set as the form with certain radian, with preferably agitation air, increase convection current.
Elevator traction machine of the invention it is reasonable in design, by the way that flabellum is arranged on rotor so that rotor rotate
When, flabellum follows rotates together, and stirs the air inside traction machine, increase traction machine it is inside and outside between air set
It changes, continually introduces the cold air of outside, the hot-air inside traction machine is discharged, to take away the heat in traction machine, reduce
Temperature in traction machine achievees the purpose that heat dissipation reduces winding temperature rise, improves electric efficiency, reduce energy consumption.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention, it is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of elevator traction machine, including base, the stator being arranged in the base, the rotor matched with the stator,
Traction sheave and rotation axis, one end of the rotation axis are connected with the rotor, and the other end of the rotation axis is connected with described
Traction sheave, which is characterized in that the rotor is provided with flabellum on the end face far from the traction sheave, the base is draged far from described
The side of running wheel is equipped with connecting plate, is offered on the connecting plate for supplying the ventilation opening flowed into or out.
2. a kind of elevator traction machine according to claim 1, which is characterized in that the flabellum is uniformly distributed in the rotor
On end face far from the traction sheave.
3. a kind of elevator traction machine according to claim 1, which is characterized in that the flabellum includes carrying out with the rotor
The interconnecting piece of connection and stopper for generating air-flow, the interconnecting piece are tightly attached on the end face of the rotor, the stopper
Intersect with the end face of the rotor.
4. a kind of elevator traction machine according to claim 3, which is characterized in that the cross sectional shape of the flabellum is V-type, half
V-type or L-type.
5. a kind of elevator traction machine according to claim 1, which is characterized in that the flabellum is sheet metal component.
6. a kind of elevator traction machine according to claim 5, which is characterized in that the material of the flabellum is stainless steel or table
The zinc-plated carbon steel in face.
7. a kind of elevator traction machine according to claim 1, which is characterized in that offered on the rotor through its thickness
The heat dissipation channel in direction, the heat dissipation channel are evenly distributed on the end face of the rotor.
8. a kind of elevator traction machine according to claim 7, which is characterized in that the installation site of the flabellum is dissipated with described
The passage of heat is corresponding.
9. a kind of elevator traction machine according to claim 7, which is characterized in that the heat dissipation channel includes interior heat dissipation channel
With outer heat dissipation channel, the interior heat dissipation channel and the outer heat dissipation channel to open up position corresponding.
10. a kind of elevator traction machine described in -9 any one according to claim 1, which is characterized in that pacify on the ventilation opening
Equipped with ventilating board, several are offered on the ventilating board for supplying the ventilation hole flowed into or out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811234520.3A CN109292596A (en) | 2018-10-23 | 2018-10-23 | A kind of elevator traction machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811234520.3A CN109292596A (en) | 2018-10-23 | 2018-10-23 | A kind of elevator traction machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109292596A true CN109292596A (en) | 2019-02-01 |
Family
ID=65157562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811234520.3A Pending CN109292596A (en) | 2018-10-23 | 2018-10-23 | A kind of elevator traction machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109292596A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002205889A (en) * | 2001-01-09 | 2002-07-23 | Mitsubishi Electric Corp | Winder for elevator |
| CN101973479A (en) * | 2010-11-05 | 2011-02-16 | 沈阳蓝光驱动技术有限公司 | Ultra-high-speed heavy-loading outer-rotor permanent magnet synchronous traction machine |
| CN202193523U (en) * | 2011-07-22 | 2012-04-18 | 叶根香 | Switched reluctance motor-type elevator traction machine |
| CN202260856U (en) * | 2011-08-04 | 2012-05-30 | 株洲南车时代电气股份有限公司 | Radiating device of permanent magnet motor rotor |
| CN204150880U (en) * | 2014-09-23 | 2015-02-11 | 歌拉瑞电梯有限公司 | A kind of built-in impeller auxiliary heat dissipation towing machine |
| JP2016105668A (en) * | 2014-12-01 | 2016-06-09 | 株式会社日立製作所 | Motor and hoist for elevator device |
| CN106487144A (en) * | 2015-08-31 | 2017-03-08 | 株式会社日立制作所 | Electric rotating machine, the elevator hoist using this electric rotating machine and elevator |
| CN206149041U (en) * | 2016-09-20 | 2017-05-03 | 江苏经纬轨道交通设备有限公司 | Pull novel cooling structure of cast aluminium rotor motor |
| CN206611258U (en) * | 2017-04-05 | 2017-11-03 | 精基科技有限公司 | A kind of permanent magnet motor Special rotor cooling structure |
| CN107612194A (en) * | 2017-09-11 | 2018-01-19 | 天津大学 | A kind of squirrel cage induction motor with inner circulating air cooling duct |
| CN207664739U (en) * | 2017-11-19 | 2018-07-27 | 泗阳高传电机制造有限公司 | A kind of heat dissipation rotor field spider of magneto |
-
2018
- 2018-10-23 CN CN201811234520.3A patent/CN109292596A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002205889A (en) * | 2001-01-09 | 2002-07-23 | Mitsubishi Electric Corp | Winder for elevator |
| CN101973479A (en) * | 2010-11-05 | 2011-02-16 | 沈阳蓝光驱动技术有限公司 | Ultra-high-speed heavy-loading outer-rotor permanent magnet synchronous traction machine |
| CN202193523U (en) * | 2011-07-22 | 2012-04-18 | 叶根香 | Switched reluctance motor-type elevator traction machine |
| CN202260856U (en) * | 2011-08-04 | 2012-05-30 | 株洲南车时代电气股份有限公司 | Radiating device of permanent magnet motor rotor |
| CN204150880U (en) * | 2014-09-23 | 2015-02-11 | 歌拉瑞电梯有限公司 | A kind of built-in impeller auxiliary heat dissipation towing machine |
| JP2016105668A (en) * | 2014-12-01 | 2016-06-09 | 株式会社日立製作所 | Motor and hoist for elevator device |
| CN106487144A (en) * | 2015-08-31 | 2017-03-08 | 株式会社日立制作所 | Electric rotating machine, the elevator hoist using this electric rotating machine and elevator |
| CN206149041U (en) * | 2016-09-20 | 2017-05-03 | 江苏经纬轨道交通设备有限公司 | Pull novel cooling structure of cast aluminium rotor motor |
| CN206611258U (en) * | 2017-04-05 | 2017-11-03 | 精基科技有限公司 | A kind of permanent magnet motor Special rotor cooling structure |
| CN107612194A (en) * | 2017-09-11 | 2018-01-19 | 天津大学 | A kind of squirrel cage induction motor with inner circulating air cooling duct |
| CN207664739U (en) * | 2017-11-19 | 2018-07-27 | 泗阳高传电机制造有限公司 | A kind of heat dissipation rotor field spider of magneto |
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