CN101789649B - Motor with mixed-flow fan for circulating inner and outer air paths - Google Patents
Motor with mixed-flow fan for circulating inner and outer air paths Download PDFInfo
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- CN101789649B CN101789649B CN2010101449522A CN201010144952A CN101789649B CN 101789649 B CN101789649 B CN 101789649B CN 2010101449522 A CN2010101449522 A CN 2010101449522A CN 201010144952 A CN201010144952 A CN 201010144952A CN 101789649 B CN101789649 B CN 101789649B
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Abstract
The invention relates to a power drive system of an electric automobile, in particular to a motor with a mixed-flow fan for circulating inner and outer air paths. The invention solves the problems that the traditional electronic automobile has low reliability, heat radiation at low speed and poor effect when a self-ventilation motor is used as well as large size, difficult heat radiation and low peak powder and overload capacity when a fully-closed motor is used. The power drive system comprises an enclosure, an end cover, an inner cooling air path and a rotor; a mixed flow forced cooling fan is arranged on a non-driving end shaft of the motor; an engine seat shell of the enclosure is provided with U-shaped channel steel closely covering on paired air holes to form an enclosure inner air duct; a fan cover is arranged outside the enclosure, covers U-shaped channel steel and then is welded between two flanges form an enclosure outer air duct together with the engine seat shell; and air holes are formed on the two flanges of the enclosure as well as at the position of the motor end cover, which corresponds to the enclosure outer air duct. The device can better protect the inside of the motor from being intruded by dust and rain water and can ensure heat dissipation, smaller volume and weight requirement.
Description
Technical field
The present invention relates to the electric powered motor drive system, relate in particular to the trailer system of electric automobile, be specially a kind of motor that flow-mixing blower fan carries out the inner and outer air paths circulation that has.
Background technology
Electric automobile is a kind of new forms of energy environmental protection automobile that rose in recent years, is power source with the electric energy, by the power traction system drive running car of controller and traction electric machine composition.This automobile and traditional fuel-engined vehicle have advantages such as zero discharge, pollution-free, energy-conservation, consumption reduction, environmental protection by comparison.The electric automobile core is a power-driven system, comprise controller and traction electric machine, the electric automobile operational mode, running environment, the particularity of technical performance has determined it that traction electric machine is had specific (special) requirements, dust in the electric automobile during traveling, rainwater, the invasion and attack of dust storm require to adopt the high-protection level motor, the operating condition of electric automobile has determined the frequent frequent start-stop of motor in the city, gap work, rotating speed is low, moment of torsion is big, to consider also when designing in addition that peak period on and off duty, city is in the time period, whether the overload capacity of motor is enough, and the reliability under the overload situations will obtain guaranteeing; Electric automobile runs on each corner in city, and existing high-speed cruising also has low cruise, requires motor to have wide speed adjustable range to adapt to the high low speed service requirement of electric automobile.In the city exceptional operating conditions of electric automobile require that the traction electric machine of frequency conversion speed-adjusting system has speed-regulating range width, overload capacity is big, peak power is high, moment of inertia is little, cooling heat radiation system is good, volume is little, characteristics such as in light weight, degree of protection height.
At present, the traction electric machine of trying out in the city electric car governing system mainly comprises two kinds, and a kind of is self-ventilation direct current machine, self-ventilation alternating current machine; Another kind is a totally-enclosed machine.Adopt these two kinds of motors all to have certain defective.
When adopting self-ventilated machine, the problem that exists comprises that the self-ventilated machine degree of protection is low, motor internal directly and outside atmosphere communicate, dust, rainwater, dust storm all can directly be attacked critical components such as motor internal winding, bearing, cause motor operational failure rate height, reliability reduction; Owing to have rotary fan in the inner rotating shaft of self-ventilated machine, when city electric car Fraquent start, braking, motor speed is low, electric current is big, and the motor internal rotation speed of the fan is low, the cooling effect variation, so the low speed heat dissipation problem is the insoluble problem of self-ventilated machine.
When adopting totally-enclosed machine, its shortcoming is to ensureing the reliable use of motor, have to reduce motor and use power and moment of torsion, increase motor volume and weight, to such an extent as to the totally-enclosed machine volume is big, Heavy Weight, radiating effect are poor, peak power and overload capacity is low, the heat radiation difficulty.Because after adopting all-sealed structure, the heat that the motor internal thermal source produces is difficult to effectively distribute, motor windings and bearing temperature can be very high, and affecting motor, too high winding and bearing temperature reliably use, make motor shortening in useful life, even burn winding under overload situations, the totally-enclosed machine internal heat is inhomogeneous, exist local temperature too high, affect the use of motor.
Summary of the invention
There is the problem that reliability is low, the low speed radiating effect is not good in the present invention in order to solve existing city electric car traction electric machine when the low self-ventilated machine of employing degree of protection; And when adopting totally-enclosed machine, have that volume is big, the problem of defective such as Heavy Weight, heat radiation difficulty, peak power and overload capacity are low, a kind of motor that flow-mixing blower fan carries out the inner and outer air paths circulation that has is provided.
The present invention is concrete to adopt following technical scheme to realize: comprise casing, end cap, inner cooling system and rotor, casing comprises two flanges and support shell, support case surface two ends vertically has paired wind hole, rotor non-transmision end axle is provided with inner centrifugal fan, rotor core inside has the rotor ventilation road, the motor non-transmision end is connected with mixed flow and forces cooling blower, the support shell of casing is provided with U type channel-section steel, and U type channel-section steel is airtight to cover on the paired wind hole that the support case surface opened vertically and constitute air channel in the casing; Casing is provided with fan housing outward, and fan housing covers between two flanges that are welded in casing behind the U type channel-section steel and constitutes the outer air channel of casing between the support shell; Two flanges of casing and electric motor end cap all offer the wind hole corresponding to place, the outer air channel of casing.The support outer surface of outer cover is provided with fin.
The inner cooling air duct circulatory system (inner cooling system) is formed in the air channel in paired wind hole on inner centrifugal fan, rotor ventilation road, the support case surface, the casing; Outside mixed flow forces the outer air channel of wind hole, casing, the fin on cooling blower, casing flange and the electric motor end cap to form the external refrigeration wind path circulatory system (external refrigeration system).Mixed flow forces cooling blower to be powered by independent current source.
Motor adopts two wind paths independent cooling system separately, the inner cooling system that the motor internal centrifugal fan forms makes the motor internal temperature even, it is inhomogeneous to have overcome the totally-enclosed machine internal temperature, the drawback that local temperature is too high, inner cooling system also helps and takes the motor internal heat to casing, quickens internal heat and is transmitted to the outside.The outside external refrigeration system that independently forces cooling blower to form of motor guarantees that motor all has good heat-sinking capability under any rotating speed, solved the problem of self-ventilated machine heat-sinking capability difference when motor speed is low, adapt to the electric automobile condition that frequently opens, stops work more, make electric automobile under any speed of a motor vehicle, can both provide powerful cooling air quantity, serious problem that the motor feels hot when effectively solving the low operation of the speed of a motor vehicle.Mixed flow is forced the existence of cooling blower, has improved the heat-sinking capability of totally-enclosed machine greatly, and it is better to make power of motor and moment of torsion, overload capacity, peak power compare common totally-enclosed machine, and volume is compared common totally-enclosed machine with weight littler.
The support outer surface of outer cover fin that distributing, the effect of fin is the area of dissipation that increases the motor surface, helps the motor heat and distributes, and fin also plays a part reinforcement, have higher bulk strength when making motor case thin, thereby reduced complete machine weight.This apparatus structure helps cooling air and brushes fin in the air channel along whole motor ventilation road, takes away the heat on motor surface better, thereby helps distributing of motor internal heat.
Compared with prior art, provided by the inventionly have the motor that flow-mixing blower fan carries out inner and outer air paths circulation and have following beneficial effect, that is:
1, this device motor protective capacities is strong, reliability is high, failure rate is low, satisfies the instructions for use of electric automobile to running environment fully;
2, the motor ventilation heat-sinking capability is efficient, can accomplish that big torque, high-power, high start torque, high-peak power and overload magnification satisfy the instructions for use of electric car peak value operating mode;
3, heat-sinking capability excellence, this device motor volume is little, in light weight by comparison, can satisfy electric automobile to low-floorization, light-weighted requirement.
Description of drawings
Fig. 1 is the structural representation that flow-mixing blower fan carries out the motor of inner and outer air paths circulation that has of the present invention;
Fig. 2 is the schematic diagram of inner cooling air duct of the present invention;
Fig. 3 is the schematic diagram of external refrigeration wind path of the present invention;
Fig. 4 is the driving end air outlet position view of motor of the present invention;
Fig. 5 forces the air inlet position view of cooling blower end for the mixed flow of motor of the present invention;
Fig. 6 is the A-A cutaway view of Fig. 1.
Among the figure: 1-flange, 2-fan housing, 3-fin, 4-support shell, 5-end cap, the outer air channel of 6-casing, the 7-mixed flow is forced cooling blower, 8-rotor ventilation road, 9-centrifugal fan, the 10-stator, air channel in the 11-rotor, 12-casing, 13-U type channel-section steel, the paired wind of 14-hole, 15-wind hole, a-air outlet, b-air inlet.
Embodiment
Have the motor that flow-mixing blower fan carries out the inner and outer air paths circulation, comprise casing, end cap 5, inner cooling system and rotor 11, casing comprises two flanges 1 and support shell 4, support shell 4 surfaces two ends vertically have paired wind hole 14, rotor 11 non-transmision end axles are provided with inner centrifugal fan 9, rotor 11 inside unshakable in one's determination have rotor ventilation road 8, the motor non-transmision end is connected with mixed flow and forces cooling blower 7, the support shell 4 of casing is provided with U type channel-section steel 13, and U type channel-section steel 13 airtight covering in constitute air channel 12 in the casing on the paired wind hole 14 of being opened vertically on support shell 4 surfaces; Casing is provided with fan housing 2 outward, and fan housing 2 covers between two flanges 1 that are welded in casing behind the U type channel-section steels 13 and constitutes the outer air channel 6 of casing between the support shell 4; Two flanges 1 of casing and electric motor end cap 5 all offer wind hole 15 corresponding to outer 6 places, air channel of casing.Support shell 4 outer surfaces are provided with fin 3.
The inner cooling air duct circulatory system (inner cooling system) is formed in air channel 12 in inner centrifugal fan 9, rotor ventilation road 8, support shell 4 lip-deep paired wind holes 14, the casing; Outside mixed flow forces the outer air channel 6 of wind hole 15, casing, the fin 3 on cooling blower 7, casing flange and the electric motor end cap to form the external refrigeration wind path circulatory system (external refrigeration system).
As shown in Figure 1, it is whole that support shell 4 becomes with two end flanges, 1 assembly welding, motor two ends end cap 5 is fixed on two end flanges 1,10 of motor stators are enclosed within support shell 4 inner cores, fan housing 2 and support shell 4 are welded between two end flanges 1, mixed flow forces cooling blower 7 to be fixedly mounted on the motor non-transmision end, and fin 3 is welded on the outer wall of support shell 4.Force the outer air channel 6 of wind hole 15, casing, fin 3 on cooling blower 7, casing flange and the electric motor end cap to constitute motor external refrigeration system by mixed flow, it is directly the air in the atmosphere to be blown into the outer air channel 6 of casing that mixed flow is forced cooling blower 7 roles, cooling air air channel 6 outside air inlet a, casing dispels backing 3, after heat exchange, heated cooling air flows to atmosphere from air outlet b and dispels the heat; The effect of fin 3 is to increase motor case surface radiating area, helps heat and is transmitted in the cooling air of air channel, and fin 3 has also strengthened the casing bulk strength simultaneously, makes casing can adopt thin cylinder, thereby has reduced complete machine weight.Form inner cooling system by air channel 12 in inner centrifugal fan 9, rotor ventilation road 8, support shell 4 lip-deep paired wind holes 14, the casing, and because enclosed construction is adopted in the air channel in the casing, so inner cooling system is independently, isolated fully with ambient atmosphere, can effectively completely cut off of the invasion and attack of poor environments such as external dust, rainwater, dust storm to the motor internal parts, guarantee that motor has high reliability, less trouble, low maintainability, has solved self-ventilated machine and has been applied in the protective difference problem that the electric car field exists.When motor rotates, inner centrifugal fan 9 agitates inner air to flow, flow in inner cooling air air channel 12 in inner centrifugal fan 9, rotor ventilation road 8, support shell 4 lip-deep paired wind holes 14, the casing, make the motor internal temperature even, heated inner cooling air has promoted the motor internal heat to conduct to shell when flowing.
Simultaneously, the inside and outside cooling system structure described in the present invention is welded to form by parts such as casing, fan housing 2, fin 3, flanges 1, but the also cast form of this structure.
Through electric automobile trial run, the motor model machine is strong through the verification experimental verification protective capacities, reliability is high, moment of torsion and power is big, volume is little, in light weight, peak value and overload capacity are big, the cooling capacity excellence.The present invention, structure implements simple possible, and technology is workable, and efficiently solves the technology drawback of traditional self-ventilated machine and totally-enclosed machine existence.
Claims (1)
1. have the motor that flow-mixing blower fan carries out the inner and outer air paths circulation, comprise casing, end cap (5), inner cooling system and rotor (11), casing comprises two flanges (1) and support shell (4), support shell (4) surface two ends vertically has paired wind hole (14), rotor (11) non-transmision end axle is provided with inner centrifugal fan (9), rotor (11) inside unshakable in one's determination has rotor ventilation road (8), it is characterized in that: the motor non-transmision end is connected with mixed flow and forces cooling blower (7); The support shell (4) of casing is provided with U type channel-section steel (13), air channel (12) in the formation casing is gone up in the airtight paired wind hole (14) of being opened vertically on support shell (4) surface that covers in of U type channel-section steel (13), and the inner cooling air duct circulatory system is formed in air channel (12) in inner centrifugal fan (9), rotor ventilation road (8), support shell (4) lip-deep paired wind hole (14), the casing; Casing is provided with fan housing (2) outward, and fan housing (2) covers between two flanges (1) that are welded in casing behind the U type channel-section steel (13) and constitutes the outer air channel (6) of casing between the support shell (4); Two flanges of casing (1) and electric motor end cap (5) locate all to offer wind hole (15) corresponding to the outer air channel (6) of casing, support shell (4) outer surface is provided with fin (3), and mixed flow forces the outer air channel (6) of wind hole (15), casing, the fin (3) on cooling blower (7), casing flange and the electric motor end cap to form the external refrigeration wind path circulatory system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101449522A CN101789649B (en) | 2010-04-09 | 2010-04-09 | Motor with mixed-flow fan for circulating inner and outer air paths |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101449522A CN101789649B (en) | 2010-04-09 | 2010-04-09 | Motor with mixed-flow fan for circulating inner and outer air paths |
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| CN101789649A CN101789649A (en) | 2010-07-28 |
| CN101789649B true CN101789649B (en) | 2011-10-05 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361368A (en) * | 2011-10-31 | 2012-02-22 | 永济新时速电机电器有限责任公司 | Efficiently-cooling motor with axial flow draft fan |
| CN104009583A (en) * | 2013-02-26 | 2014-08-27 | 上海仕强电气有限公司 | Inner air-cooled motor |
| CN103199644A (en) * | 2013-04-18 | 2013-07-10 | 南京理工大学 | DC (direct current) motor forced internal air cooling device |
| CN103457396B (en) * | 2013-08-23 | 2016-08-10 | 江苏航天动力机电有限公司 | A kind of structure of electric machine stand |
| CN105927483B (en) * | 2016-07-01 | 2023-09-26 | 河北工业大学 | Surrounding type wind driven generator cooling system |
| JP2018064384A (en) * | 2016-10-13 | 2018-04-19 | 東芝三菱電機産業システム株式会社 | Totally enclosed fan cooled type rotary electric machine |
| CN107492978A (en) * | 2017-10-20 | 2017-12-19 | 中车永济电机有限公司 | Light rail, electric driving machinery of subway |
| CN109951025B (en) * | 2019-05-06 | 2020-12-01 | 安徽皖南新维电机有限公司 | Motor with dustproof anticorrosion shell |
| CN110943591A (en) * | 2020-01-14 | 2020-03-31 | 深圳市浩立能源科技有限公司 | Automobile switch reluctance motor |
| CN114583871B (en) * | 2022-04-06 | 2022-08-26 | 常州市南方电机有限公司 | Motor shell structure with primary energy efficiency and assembly method thereof |
| CN114856823B (en) * | 2022-05-09 | 2023-11-10 | 西安空天机电智能制造有限公司 | Cooling structure of air-cooled rotor engine and unmanned aerial vehicle |
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| CN101789649A (en) | 2010-07-28 |
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Address after: 044500 Yongji City, Shanxi Province, the city of motor street, No. 18, No. Patentee after: CRRC YONGJI ELECTRIC CO., LTD. Address before: 044500 No. 18, motor street, Yongji, Shanxi Patentee before: Yongji Xinshisu Motor Electrical Appliance Co., Ltd. |