CN103944303A - Circulating ventilation structure of fully-closed permanent magnet synchronous traction motor - Google Patents
Circulating ventilation structure of fully-closed permanent magnet synchronous traction motor Download PDFInfo
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- CN103944303A CN103944303A CN201410146531.1A CN201410146531A CN103944303A CN 103944303 A CN103944303 A CN 103944303A CN 201410146531 A CN201410146531 A CN 201410146531A CN 103944303 A CN103944303 A CN 103944303A
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Abstract
The invention discloses a circulating ventilation structure of a fully-closed permanent magnet synchronous traction motor. A front baffle is arranged on the outer side of a front end cover, a rear baffle is arranged on the outer side of a rear end cover, and ventilation shells are connected between the four corners of the front baffle and the four corners of the rear baffle. The center of the front end cover and the center of the rear end cover are respectively provided with annular through groove, and the front baffle and the rear baffle are respectively provided with an annular channel. A fan on a rotating shaft rotates to drive air currents to flow into cavities of the ventilation shells at the four corners from a ventilation groove between a rotor iron core and a stator iron core through the annular through groove of the front end cover and the annular channel of the front baffle, and then flow back into the motor through the annular channel of the rear baffle and the annular through groove of the rear end cover to form an internal circulating air path. External air currents enter a ventilation groove between the stator iron core and a middle shell from an inlet of the front end cover and flow out from an outlet of the rear end cover to form an external circulating air path. According to the circulating ventilation structure of the fully-closed permanent magnet synchronous traction motor, heat of a rotor and a winding inside the motor is effectively transmitted into the environment through the internal circulating air path, the vast majority of loss produced by the motor is transmitted into air through the external circulating air path, and the heat dissipation capability is maximized.
Description
Technical field
The present invention relates to a kind of circulating ventilation structure of motor, relate in particular to a kind of circulating ventilation structure of totally enclosed type permanent-magnet synchronizing traction motor.
Background technology
Motor is a kind of switching mechanism of electromechanical energy, inevitably will produce loss in energy converting between mechanical process, and these loss overwhelming majority finally change for heat, and motor portion temperature is raise.Research shows, in the time that working temperature rises, the residual flux density Br of permanent magnet can decline, and as neodymium iron boron, Br 120 DEG C time drops to 90%; In addition,, in the time that temperature continues to rise, can there is irreversible demagnetization in permanent magnet, also cannot return to original magnetic property completely even if magnetize.The decline of permanent magnet magnetic performance can affect the reliability and stability of traction electric machine, even threatens the safety of passenger and train.Therefore, effective cooling structure reasonable in design is very necessary and important.
At present, the conventional High Speed Railway Trains traction electric machine type of cooling have nature cooling with cooling two kinds of forced ventilation.Naturally cooling is exactly to utilize mobile air and motor housing to carry out heat loss through convection, although it is simple in structure that the natural type of cooling has, without spare system, the advantage such as convenient for installation and maintenance, but naturally cooling velocity air heat-sinking capability is low, and the application on high power density motor exists certain deficiency; The mobile air of the cooling utilization of forced ventilation carries out heat loss through convection to the key element such as motor stator or rotor, structure relative complex, but the cooling heat-sinking capability of forced ventilation is high, can meet the application of high power density motor, and in the existing auxiliary system of bullet train itself, comprise wind path, can provide wind regime for motor.
Due to the intrinsic electromagnetic property of permanent magnet, permanent magnet easily adsorbs dust and iron filings, for improving the reliability of permanent-magnet synchronizing traction motor, improves electrical machinery life, reduces maintenance cost, and motor adopts full-closed structure.But full-closed structure causes the main heater element winding of motor and heat-sensitive element permanent magnet and cooling-air cannot carry out direct heat exchange, the heat that loss produces can only arrive by stator and casing indirect transfer extraneous, and the design of cooling structure is had higher requirement.
Summary of the invention
The object of the present invention is to provide a kind of circulating ventilation structure of totally enclosed type permanent-magnet synchronizing traction motor, utilize the form of forced ventilation and internal-external double circulation, avoid the phenomenon of winding insulation high temperature failure and permanent magnet high temperature irreversible demagnetization to occur, ensure the reliability service of traction electric machine and train, for the permanent-magnet synchronizing traction motor of High Speed Railway Trains.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention includes rotor core, stator core, winding, rotating shaft, rear end cap, front end housing and intermediate case, front apron and backboard are equipped with respectively in the outside of front end housing, rear end cap, between four jiaos of front apron outside intermediate case and backboards, be all connected with ventilation shell, the cavity connecting before and after ventilation shell has;
Front end housing and rear end cap center all have annular through groove, and front apron, backboard dock a side with front end housing, rear end cap annular through groove respectively and be provided with circular passage, and circular passage communicates with the cavity of ventilation shell;
In the rotating shaft of forward end cap one side, fan is housed, the air-flow that fan rotates in drive motor flows to the ventilation shell cavity of four jiaos by the ventilation slot between rotor core and stator core through the annular through groove of front end housing, the circular passage of front apron, then forms interior circulation wind path through the circular passage of backboard, the ventilation slot that the annular through groove of rear end cap is got back between rotor core and stator core.
The ventilation slot that described outer gas stream enters between stator core and intermediate case through front end housing entrance is flowed out and is formed outer circulation wind path by the outlet of rear end cap.
The invention has the beneficial effects as follows:
1, the most losses that rely on the forced-air systems of outer circulation that motor is produced are delivered in air.
2, take away on the basis of most of heat at external circulating system, effectively the heat of motor internal rotor and winding is delivered in environment by internal circulation system.
3, make full use of high-speed train bogie space, heat-sinking capability is maximized.
Brief description of the drawings
Fig. 1 is overall schematic of the present invention.
Fig. 2 is inner circulation structure schematic diagram of the present invention.
Fig. 3 is forward sight and the partial cutaway schematic of inner circulation structure of the present invention.
Fig. 4 is axial section schematic diagram of the present invention.
Fig. 5 is radial section schematic diagram of the present invention.
In figure: 1, rotor core, 2, stator core, 3, winding, 4, front end housing, 5, intermediate case, 6, rear end cap, 7, rotating shaft, 8, ventilation shell, 9, fan, 10, hang, 11, front apron, 12, backboard, 13, interior circulation wind path, 14, outer circulation wind path.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Fig. 1 and Fig. 4, the present invention includes rotor core 1, stator core 2, winding 3, rotating shaft 7, rear end cap 6, front end housing 4 and intermediate case 5, front apron 11 and backboard 12 are equipped with respectively in the outside of front end housing 4, rear end cap 6, between 12 4 jiaos of front apron 11 outside intermediate case 5 and backboards, be all connected with ventilation shell 8, the cavity connecting before and after ventilation shell 8 has; Front end housing 4 and rear end cap 6 centers all have annular through groove, and annular through groove communicates with in motor, and front apron 11, backboard 12 dock a side with front end housing 4, rear end cap 6 annular through groove respectively and be provided with circular passage, and circular passage communicates with the cavity of ventilation shell 8; In the rotating shaft 7 of forward end cap 4 one sides, fan 9 is housed, the air-flow that fan 9 rotates in drive motor flows to ventilation shell 8 cavities of four jiaos by the ventilation slot between rotor core 1 and stator core 2 through the annular through groove of front end housing 4, the circular passage of front apron 11, then forms interior circulation wind path 13 through the circular passage of backboard 12, the ventilation slot that the annular through groove of rear end cap 6 is got back between rotor core 1 and stator core 2.
As shown in Figure 2 and Figure 3, front apron 11 is connected to ventilation shell 8 two ends with backboard 12, the cavity of the annular hollow chamber of front apron 11, backboard 12 and ventilation shell 8 is connected as a single entity, as the partial component of interior circulation wind path 13.
As shown in Figure 4, the ventilation slot that outer gas stream end entrance on front end housing 4 enters between stator core 2 and intermediate case 5 is flowed out and is formed outer circulation wind path 14 by the outlet of rear end cap 6.
As shown in Fig. 1 and Fig. 4, existing full-enclosed permanent-magnet sync pulling motor comprises: rotating shaft 7, be enclosed within the rotor core 1 in rotating shaft 7, be enclosed within outside rotor core 1 and the stator core 2 of the little ventilation slot of being separated by, be embedded in the winding 3 in stator core 2 grooves, be surrounded on the intermediate case 5 outside stator core 2, lay respectively at the front end housing 4 and rear end cap 6 of intermediate case 5 both sides, be positioned at the suspension 10 being connected in intermediate case 5 and with outside bogie.
As shown in Fig. 4 and Fig. 5, interior circulation wind path 13: forward end cap 4 one sides of rotating shaft 7 are equipped with fan 9, in the time of electric machine rotation, fan 9 is along with rotating shaft 7 is rotated, stirring motor inner air, its operation principle is identical with compressor.The pressure difference of both sides, front and back, air is flowed via the ventilation slot between rotor core 1 and stator core 2, and enter backboard 12 via rear end cap 6, and arrive in front end housing 4 through front apron 11 again through the cavity of the ventilation shells 8 of four jiaos, form complete internal circulation system wind path.
In internal circulation system, fan 9 rises air velocity in motor, carries out heat exchange fully with rotor core 1 and winding 3, and provides power for interior circulation wind path flows.Internal circulation system imports to motor internal air in interior circulation wind path 13, makes inner air and external environment condition directly carry out heat exchange, and without dispelling the heat to outer circulation wind path 14 via stator core 2, the efficiency of heat exchange is improved.The structure of front apron 11, backboard 12 and the ventilation shell 8 of interior circulation wind path 13 can have various ways, and the present invention can be applied to the permanent-magnet synchronizing traction motor of High Speed Railway Trains, and its size must meet the bogie dimensional requirement of High Speed Railway Trains.
As shown in Fig. 4 and Fig. 5, the shape of outer circulation wind path 14 can be square, can be also circular or other any air channel structures, and this sentences square is example.External circulating system adopts forced ventilation form, cooling-air enters motor via the opening of front end housing 4, in front end housing 4, exist a circle baffle plate that cooling-air and rotor core 1, stator core 2 and winding 3 are isolated, cooling-air is flowed through between intermediate case 5 and stator core 2, flowed out again this complete wind path that is external circulating system by the outlet of rear end cap.In external circulating system, cooling-air can effectively utilize thermal convection the heat on stator core 2 is taken away to motor.
The specific embodiment of the invention course of work is:
Adopt the form of internal-external double circulation to dispel the heat to permanent-magnet synchronizing traction motor, the cooling-air that wherein forced ventilation is provided with wind system by train forms outer circulation wind path 14, its path is via air intake vent and front end housing 4, stator core 2 outer surfaces of flowing through, then enter atmosphere via rear end cap 6.Front end housing 4 and stator core 2 by the cooling-air in outer circulation and motor internal air insulated, guarantee that airborne iron filings and dust can not enter motor internal by the circle of one on end cap metal baffle.
Internal circulation system is by the fan 9 stirring motor inner air flows in rotating shaft, by the annular through groove of front end housing 4, the cavity of front apron 11, ventilation shell 8 and backboard 12 of flowing through, then enter motor internal via the annular through groove of rear end cap 6, form complete interior circulation wind path 13.In this wind path, motor internal air and surrounding air carry out heat exchange, and both temperature difference are large, can effectively reduce the air themperature of circulation, and then reduce the element such as rotor and winding of motor internal.Air in storing tank does not circulate mutually.
Therefore most losses that, the present invention can rely on the forced-air systems of outer circulation that motor is produced are delivered in air; And take away at external circulating system on the basis of most of heat, effectively the heat of motor internal rotor and winding is delivered in environment by internal circulation system; And make full use of high-speed train bogie space, heat-sinking capability is maximized.
Content described in this specification embodiment is only enumerating of way of realization to inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also and conceive the equivalent technologies means that can expect according to the present invention in those skilled in the art.
Claims (2)
1. the circulating ventilation structure of a totally enclosed type permanent-magnet synchronizing traction motor, comprise rotor core (1), stator core (2), winding (3), rotating shaft (7), rear end cap (6), front end housing (4) and intermediate case (5), it is characterized in that: front apron (11) and backboard (12) are equipped with respectively in the outside of front end housing (4), rear end cap (6), between (12) four jiaos of the front apron (11) that intermediate case (5) is outer and backboards, be all connected with ventilation shell (8), the cavity of perforation before and after ventilation shell (8) has;
Front end housing (4) and rear end cap (6) center all have annular through groove, front apron (11), backboard (12) dock a side and are provided with circular passage with front end housing (4), rear end cap (6) annular through groove respectively, and circular passage communicates with the cavity of ventilation shell (8);
In the rotating shaft (7) of forward end cap (4) one sides, fan (9) is housed, the air-flow that fan (9) rotates in drive motor flows to ventilation shell (8) cavity of four jiaos by the ventilation slot between rotor core (1) and stator core (2) through the annular through groove of front end housing (4), the circular passage of front apron (11), then forms interior circulation wind path (13) through the circular passage of backboard (12), the ventilation slot that the annular through groove of rear end cap (6) is got back between rotor core (1) and stator core (2).
2. the circulating ventilation structure of a kind of totally enclosed type permanent-magnet synchronizing traction motor according to claim 1, is characterized in that: the ventilation slot that described outer gas stream enters between stator core (2) and intermediate case (5) through front end housing (4) entrance is flowed out and formed outer circulation wind path (14) by the outlet of rear end cap (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410146531.1A CN103944303A (en) | 2014-04-14 | 2014-04-14 | Circulating ventilation structure of fully-closed permanent magnet synchronous traction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410146531.1A CN103944303A (en) | 2014-04-14 | 2014-04-14 | Circulating ventilation structure of fully-closed permanent magnet synchronous traction motor |
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| Publication Number | Publication Date |
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| CN103944303A true CN103944303A (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410146531.1A Pending CN103944303A (en) | 2014-04-14 | 2014-04-14 | Circulating ventilation structure of fully-closed permanent magnet synchronous traction motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059176A (en) * | 2016-08-12 | 2016-10-26 | 中车永济电机有限公司 | Full-laminated motor engine base with double-circulation air channel |
| CN113965019A (en) * | 2021-10-25 | 2022-01-21 | 中车永济电机有限公司 | Rotor heat radiation structure of sealed motor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3461328A (en) * | 1966-06-07 | 1969-08-12 | Drouard Moteurs | Externally prismatic shaped electromagnetic rotary machine |
| EP0385596A1 (en) * | 1989-02-28 | 1990-09-05 | Titan Tool, Inc. | Totally enclosed electric motor |
| US5998896A (en) * | 1997-11-19 | 1999-12-07 | Reliance Electric Industrial Company | Electric motor having frame adaptable for enclosed and open motor cooling |
| CN102064627A (en) * | 2010-12-31 | 2011-05-18 | 西安盾安电气有限公司 | Air-cooling wind driven generator base |
| CN201846192U (en) * | 2010-09-27 | 2011-05-25 | 东莞市邦泽电子有限公司 | Motor with cooling device and shredder |
| CN102356534A (en) * | 2009-03-17 | 2012-02-15 | 株式会社东芝 | Totally-enclosed main motor for vehicle |
| CN103166363A (en) * | 2013-01-31 | 2013-06-19 | 南车株洲电力机车研究所有限公司 | Composite air cooling system of full sealed traction motor |
| CN203859620U (en) * | 2014-04-14 | 2014-10-01 | 浙江大学 | Circulating ventilation structure of totally-enclosed permanent-magnetism synchronous traction motor |
-
2014
- 2014-04-14 CN CN201410146531.1A patent/CN103944303A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3461328A (en) * | 1966-06-07 | 1969-08-12 | Drouard Moteurs | Externally prismatic shaped electromagnetic rotary machine |
| EP0385596A1 (en) * | 1989-02-28 | 1990-09-05 | Titan Tool, Inc. | Totally enclosed electric motor |
| US5998896A (en) * | 1997-11-19 | 1999-12-07 | Reliance Electric Industrial Company | Electric motor having frame adaptable for enclosed and open motor cooling |
| CN102356534A (en) * | 2009-03-17 | 2012-02-15 | 株式会社东芝 | Totally-enclosed main motor for vehicle |
| CN201846192U (en) * | 2010-09-27 | 2011-05-25 | 东莞市邦泽电子有限公司 | Motor with cooling device and shredder |
| CN102064627A (en) * | 2010-12-31 | 2011-05-18 | 西安盾安电气有限公司 | Air-cooling wind driven generator base |
| CN103166363A (en) * | 2013-01-31 | 2013-06-19 | 南车株洲电力机车研究所有限公司 | Composite air cooling system of full sealed traction motor |
| CN203859620U (en) * | 2014-04-14 | 2014-10-01 | 浙江大学 | Circulating ventilation structure of totally-enclosed permanent-magnetism synchronous traction motor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059176A (en) * | 2016-08-12 | 2016-10-26 | 中车永济电机有限公司 | Full-laminated motor engine base with double-circulation air channel |
| CN113965019A (en) * | 2021-10-25 | 2022-01-21 | 中车永济电机有限公司 | Rotor heat radiation structure of sealed motor |
| CN113965019B (en) * | 2021-10-25 | 2024-01-23 | 中车永济电机有限公司 | Rotor heat radiation structure of sealed motor |
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Application publication date: 20140723 |