CN105634210A - Motor capable of realizing stator closed and rotor open ventilation mode by adopting axial-flow ventilation - Google Patents
Motor capable of realizing stator closed and rotor open ventilation mode by adopting axial-flow ventilation Download PDFInfo
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- CN105634210A CN105634210A CN201610157490.5A CN201610157490A CN105634210A CN 105634210 A CN105634210 A CN 105634210A CN 201610157490 A CN201610157490 A CN 201610157490A CN 105634210 A CN105634210 A CN 105634210A
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- 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
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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
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/08—Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
Abstract
The invention discloses a motor capable of realizing a stator closed and rotor open ventilation mode by adopting axial-flow ventilation. An adopted shaft is provided with an external circumferential spiral groove, and the spiral groove matches with axial-flow fans with two clingy ends and the same spiral directions to form an axial-flow combined ventilation apparatus; the apparatus is arranged in a rotor and at two ends of the rotor, and the extra axial space of the motor is not occupied, so that the motor is compact in structure; due to different steering directions, airflow directions are also different but the motor can be cooled; in combination with labyrinth seal, a combined cooling mode of stator closed ventilation cooling and rotor open ventilation cooling of the motor is realized, and the combined cooling mode enables the insulation reliability of a stator and the heat dissipation capability of a rotor to be both ensured and improves the motor efficiency; a stator cooling air duct consists of vent holes (2x), a stator air duct (2h) and an air duct section (6h); a rotor cooling air duct consists of vent holes (5y), gaps (9b), a spiral groove (4b) and gaps (10b); the two cooling air ducts are connected in series; and the spiral combined apparatus provides air pressures for the cooling air ducts.
Description
Technical field
The present invention relates to the totally-enclosed self-ventilation electric motor with driving rail vehicle of industrial application.
Background technology
The stators and rotators heating of three-phase asynchronous motor about respectively accounts for half, the stator heating of industrial motor is slightly higher than rotor, for rail vehicle traction motor due to working load big, rotor slip rate is big, and rotor thermal value can reach more than half of overall thermal value;
Rail vehicle travels on two one steel rails, standard gauge 1435 millimeters, and the power plant module of traction motor, shaft coupling, wheel casing composition is just placed in this fixing space, also needs to retain certain daily maintenance space to operation personnel simultaneously; Track traffic simultaneously is operated in open-air atmosphere, stands the test of various sleet, dust, dust storm erosion, so the overall requirement of traction motor is that volume is little, weight light, power density height by rail traffic vehicles, resists severe environment ability strong.
The ventilating and cooling mode of three-phase asynchronous motor is divided into open self-ventilation, closed formula self-ventilation, open forced ventilation usually:
1., for existing open self-ventilation electric motor: cooled external air directly flows through stators and rotators surface, take away major part heat, good cooling results; Shortcoming is the erosion that fixed subcoil insulating system is easily subject to extraneous dust, moisture, greasy dirt, statistics according to international motor association, owing to stator insulation fault causes the probability of electric motor fails to account for more than overall three one-tenth, it is only second to the electric motor fails that bearing fault causes, for open electric motor, the probability of generation stator insulation fault can be higher;
What current metro industry was generally applied is open self-ventilation traction motor, summary according to actual service condition, after electric motor puts into operation 10 years, stator insulation failure rate can raise rapidly, the traction motor moon failure rate of single line may reach 2��3, and mainly occurs in insulating fault;
Usually need dust removal by filtration device is installed at the blast inlet of open self-ventilation traction motor, remove the most of dust in cooling air. Dust removal by filtration device needs regular dismounting to clean, and the cycle is approximately 3 months, and at substantial is artificial.
2., for existing enclosed self-ventilated type motor, advantage is that stator insulation has cleaning Working environment thus insulating reliability height; Deficiency is that stator directly contacts with shell, heat conduction efficiency height, dispelled the heat by shell than being easier to, and rotor is enclosed in housing, heat is difficult to distribute, so to be improved the power efficiency of enclosed motor, rotor heat radiation is bigger challenge, the motor of same power efficiency, enclosed motor has bigger volume and weight relative to open electric motor, and therefore material cost also can rise;
Current low-floor tramway is popularized rapidly at home, and the traction electric machine of tramway is near road surface, it is easy to contact rainwater and dust, it is necessary to adopt closed traction motor; In order to increase the space of passenger and passage above bogie, it is necessary to the volume of traction electric machine is enough little; In order to meet bigger ramp through performance and improve Brake energy recovery rate, it is desired to the power of traction motor is enough big, and current traction motor design effort is all proposed huge challenge by these factors.
3. for existing open forced ventilation electric motor, advantage is that volume is little, and weight is light, power density height; Deficiency needs independent blower fan and air channel, extra increase cost and space requirement;
What current high ferro motor-car and locomotive were generally applied is open forced ventilation traction motor, because motor power is required high by vehicle, and existing open self-ventilation electric motor volume is too big, and the space of bogie can not hold; Open forced ventilation traction motor needs independent blower fan and air channel, is arranged in below compartment, and installation work is very loaded down with trivial details, a job of the unusual headache of Shi Zheng depot.
4. the rotor heating of three-phase asynchronous motor is many, high 50 to 100 degree of usual working rotor Temperature Ratio stator working temperature, and rotor heat easily conducts to bearing by axle, and bearing operating temperatures height can reduce the performance of lubricating grease and then lower the life-span of bearing; The overplumping of being heated of bearing inner ring may make the working gap of bearing disappear, and bearing is stuck and then burns electric motor.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, thering is provided a kind of adopts axial flow ventilation to realize the closed electric motor with the open draft type of rotor of stator, as an open and intermediate varieties that is enclosed machine, except explosion-proof, diving and the special motor such as peculiar to vessel, it is possible to substitute the open and enclosed motor that major part is conventional, make the cost of electric motor low, volume is little, working temperature is low, and the reliability of working efficiency height, bearing and stator insulation is also high;
For achieving the above object, the first inventive technique scheme of the present invention is as follows:
The outside of motor is that shell, front end end cover, rear end lid tighten together and form a cavity;
Stator comprises stator core and stator winding, and stator winding is fixed in the equally distributed groove of stator core inner periphery; The End winding of stator is arranged in stator core two ends; Connection joint between multiple coils of composition stator winding has been placed in the side of left end winding; Stator core is fixed on the inner periphery of shell by shrink-fit;
Front bearing is arranged on the central position of front end end cover, and there is the labyrinth gland of responsible solid bearing left and right;
Rear bearing is arranged on the central position of rear end cap, and there is the labyrinth gland of responsible solid bearing left and right;
Axle is placed in the centre hole of front bearing and rear bearing, rely on two bearings realize 2 support rotate freely ability;
Rotor comprises rotor core and mouse cage winding, and mouse cage winding is fixed in the equally distributed groove of rotor core excircle; Mouse cage end ring is arranged in the both sides of rotor core; Rotor core inner hole sleeve, in the mid-way of axle, relies on shrink-fit to rotate by band moving axis, by axle head outputting power;
The flange of front end end cover and velocity sensor fluted disc form labyrinth seal, the flange of rear axial fan and the flange of rear end cap form labyrinth seal, this two places cooperation position separates stator winding and air channel, and for reaching the open ventilating and cooling of rotor, the closed ventilating and cooling of stator becomes possibility;
The stator air channel of motor housing is in the width outside motor main body and highly maximum sized four angles, does not take motor circumferential size, for stators and rotators retains maximum space, has higher power density;
The excircle of the middle maximum diameter section of axle is provided with spiral slot, and front axial fan and rear axial fan are arranged in the both sides of the spiral section of axle; The wind leaf of two axial fans is also spiral device and identical with the hand of spiral of the spiral slot on axle; When the rotor rotates, three groups of spiral devices on three parts produce the superposition of wind-force, promote air to flow in air channel; Changing if rotor turns to, wind direction also changes, but does not affect motor cooling; The axial size that this kind of axial flow combination refrigerating unit does not take motor does not need the radial dimension of expanded motor yet so that the profile of motor is compacter; According to the needs of cooling air quantity and blast, and simplify structure, it is possible to any combination being used alone in the spiral section of axle or itself and forward and backward axial fan;
Stator cooling air channel is connected mutually with rotor cooling air channel, jointly provides blast by spiral combination unit;
Blast inlet is had near front bearing place at front end end cover; Rear axial fan has wrapped up the installation position of the rear bearing of rear end cap, objectively can strengthen the cooling of forward and backward bearing, it is to increase the life-span of bearing;
Velocity sensor fluted disc is put in this position and does not additionally take motor axial length, is conducive to motor shaft to compact dimensions; If not needing velocity sensor, it is possible to cancel this part, suitably after amendment, the flange of axial fan reaches the effect of labyrinth seal.
For achieving the above object, the 2nd inventive technique scheme of the present invention is as follows:
The outside of motor is that shell, front end end cover, rear end lid tighten together and form a cavity;
Stator comprises stator core and stator winding, and stator winding is fixed in the equally distributed groove of stator core inner periphery; The End winding of stator is arranged in stator core two ends; Connection joint between multiple coils of composition stator winding has been placed in the side of left end winding; Stator core is fixed on the inner periphery of shell by shrink-fit;
Front bearing is arranged on the central position of front end end cover, and there is the labyrinth gland of responsible solid bearing left and right;
Rear bearing is arranged on the central position of rear end cap, and there is the labyrinth gland of responsible solid bearing left and right;
Axle is placed in the centre hole of front bearing and rear bearing, rely on two bearings realize 2 support rotate freely ability;
Rotor comprises rotor core and mouse cage winding, and mouse cage winding is fixed in the equally distributed groove of rotor core excircle; Mouse cage end ring is arranged in the both sides of rotor core; Rotor core inner hole sleeve, in the mid-way of axle, relies on shrink-fit to rotate by band moving axis, by axle head outputting power;
The flange of front end end cover and velocity sensor fluted disc form labyrinth seal, the flange of rear axial fan and the flange of rear end cap form labyrinth seal, this two places cooperation position separates stator winding and air channel, and for reaching the open ventilating and cooling of rotor, the closed ventilating and cooling of stator becomes possibility;
Motor housing air channel is positioned at the inner periphery of shell and is uniformly distributed, and the excircle of stator core is also evenly slotted as the flowing of air reserves passage; On the one hand stator core is directly and air contact, good cooling results, and these grooves isolation stator yoke and cast iron housing, lower iron loss on the other hand;
The excircle of the middle maximum diameter section of axle is provided with spiral slot, and front axial fan and rear axial fan are arranged in the both sides of the spiral section of axle; The wind leaf of two axial fans is also spiral device and identical with the hand of spiral of the spiral slot on axle; When the rotor rotates, three groups of spiral devices on three parts produce the superposition of wind-force, promote air to flow in air channel; Changing if rotor turns to, wind direction also changes, but does not affect motor cooling; The axial size that this kind of axial flow combination refrigerating unit does not take motor does not need the radial dimension of expanded motor yet so that the profile of motor is compacter; According to the needs of cooling air quantity and blast, and simplify structure, it is possible to any combination being used alone in the spiral section of axle or itself and forward and backward axial fan;
Stator cooling air channel is connected mutually with rotor cooling air channel, jointly provides blast by spiral combination unit;
Blast inlet is had near front bearing place at front end end cover; Rear axial fan has wrapped up the installation position of the rear bearing of rear end cap, objectively can strengthen the cooling of forward and backward bearing, it is to increase the life-span of bearing;
Velocity sensor fluted disc is put in this position and does not additionally take motor axial length, is conducive to motor shaft to compact dimensions; If not needing velocity sensor, it is possible to cancel this part, suitably the flange of the left axial fan of amendment reaches the effect of labyrinth seal.
For achieving the above object, the 3rd inventive technique scheme of the present invention is as follows:
The outside of motor is that shell, front end end cover, rear end lid tighten together and form a cavity;
Stator comprises stator core and stator winding, and stator winding is fixed in the equally distributed groove of stator core inner periphery; The End winding of stator is arranged in stator core two ends; Connection joint between multiple coils of composition stator winding has been placed in the side of right-hand end winding; Stator core is fixed on the inner periphery of shell by shrink-fit;
Front bearing is arranged on the central position of front end end cover, and there is the labyrinth gland of responsible solid bearing left and right;
Rear bearing is arranged on the central position of rear end cap, and there is the labyrinth gland of responsible solid bearing left and right;
Axle is placed in the centre hole of front bearing and rear bearing, rely on two bearings realize 2 support rotate freely ability;
Rotor comprises rotor core and mouse cage winding, and mouse cage winding is fixed in the equally distributed groove of rotor core excircle; Mouse cage end ring is arranged in the both sides of rotor core; Rotor core inner hole sleeve, in the mid-way of axle, relies on shrink-fit to rotate by band moving axis, by axle head outputting power;
The flange of front end end cover and the flange of front axial fan form labyrinth seal, the flange of rear axial fan and the flange of rear end cap form labyrinth seal, this two places cooperation position separates stator winding and air channel, and for reaching the open ventilating and cooling of rotor, the closed ventilating and cooling of stator becomes possibility;
Motor housing air channel is positioned at the inner periphery of shell and is uniformly distributed, and the excircle of stator core is also evenly slotted as the flowing of air reserves passage; On the one hand stator core is directly and air contact, good cooling results, and these grooves isolation stator yoke and cast iron housing, lower iron loss on the other hand;
The excircle of the middle maximum diameter section of axle is provided with spiral slot, and front axial fan and rear axial fan are arranged in the both sides of the spiral section of axle; The wind leaf of two axial fans is also spiral device and identical with the hand of spiral of the spiral slot on axle; When the rotor rotates, three groups of spiral devices on three parts produce the superposition of wind-force, promote air to flow in air channel; Changing if rotor turns to, wind direction also changes, but does not affect motor cooling; The axial size that this kind of axial flow combination refrigerating unit does not take motor does not need the radial dimension of expanded motor yet so that the profile of motor is compacter; According to the needs of cooling air quantity and blast, and simplify structure, it is possible to any combination being used alone in the spiral section of axle or itself and forward and backward axial fan;
Stator cooling air channel is connected mutually with rotor cooling air channel, jointly provides blast by spiral combination unit;
Front axial fan has wrapped up the installation position of the front bearing of front end end cover; Blast inlet is had near rear bearing place at rear end cap; Objectively can strengthen the cooling of forward and backward bearing, it is to increase the life-span of bearing.
For achieving the above object, the 4th inventive technique scheme of the present invention is as follows:
The outside of motor is that shell, front end end cover, rear end lid tighten together and form a cavity;
Stator comprises stator core and stator winding, and stator winding is fixed in the equally distributed groove of stator core inner periphery; The End winding of stator is arranged in stator core two ends; Connection joint between multiple coils of composition stator winding has been placed in the side of right-hand end winding; Stator core is fixed on the inner periphery of shell by shrink-fit;
Front bearing is arranged on the central position of front end end cover, and there is the labyrinth gland of responsible solid bearing left and right;
Rear bearing is arranged on the central position of rear end cap, and there is the labyrinth gland of responsible solid bearing left and right;
Axle is placed in the centre hole of front bearing and rear bearing, rely on two bearings realize 2 support rotate freely ability;
Rotor comprises rotor core and mouse cage winding, and mouse cage winding is fixed in the equally distributed groove of rotor core excircle; Mouse cage end ring is arranged in the both sides of rotor core; Rotor core inner hole sleeve, in the mid-way of axle, relies on shrink-fit to rotate by band moving axis, by axle head outputting power;
The flange of front end end cover and the flange of front axial fan form labyrinth seal, the flange of rear axial fan and the flange of rear end cap form labyrinth seal, this two places cooperation position separates stator winding and air channel, and for reaching the open ventilating and cooling of rotor, the closed ventilating and cooling of stator becomes possibility;
Motor housing air channel is positioned at the excircle of shell, and in order to simplify containment structure and reduce weight, the wind cover that stator air channel is covered by shell realizes, and wind cover is a thin-wall stamping part;
The excircle of the middle maximum diameter section of axle is provided with spiral slot, and front axial fan and rear axial fan are arranged in the both sides of the spiral section of axle; The wind leaf of two axial fans is also spiral device and identical with the hand of spiral of the spiral slot on axle; When the rotor rotates, three groups of spiral devices on three parts produce the superposition of wind-force, promote air to flow in air channel; Changing if rotor turns to, wind direction also changes, but does not affect motor cooling; The axial size that this kind of axial flow combination refrigerating unit does not take motor does not need the radial dimension of expanded motor yet so that the profile of motor is compacter; According to the needs of cooling air quantity and blast, and simplify structure, it is possible to any combination being used alone in the spiral section of axle or itself and forward and backward axial fan;
Stator cooling air channel is connected mutually with rotor cooling air channel, jointly provides blast by spiral combination unit;
Front axial fan has wrapped up the installation position of the front bearing of front end end cover; Blast inlet is had near rear bearing place at rear end cap; Objectively can strengthen the cooling of forward and backward bearing, it is to increase the life-span of bearing.
Further, axial flow combination refrigerating unit, the excircle of the middle maximum diameter section of axle is provided with spiral slot, and front axial fan and rear axial fan are arranged in the both sides of the spiral section of axle; The wind leaf of two axial fans is also spiral device and identical with the hand of spiral of the spiral slot on axle; When the rotor rotates, three groups of spiral devices on three parts produce the superposition of wind-force, promote air to flow in air channel; Changing if rotor turns to, wind direction also changes, but does not affect motor cooling; The axial size that this kind of axial flow combination refrigerating unit does not take motor does not need the radial dimension of expanded motor yet so that the profile of motor is compacter; According to the needs of cooling air quantity and blast, and simplify structure, it is possible to any combination being used alone in the spiral section of axle or itself and forward and backward axial fan.
Further, namely the spiral on axle excircle can be integrated on the excircle of motor shaft, is a part for axle; Can also adopting and the form of axle split, adopt the whisker of square-section, heat is set on the excircle of axle to realize identical function, reduces material and machining cost; Adopt the processing mode that spiral is integrated on axle, it is also possible to additional processing many slot segmentation vertically, forms multistage turbine to increase the circulation of air.
Further, the stator air channel of motor housing is in the width outside motor main body and highly maximum sized four angles, does not take motor circumferential size, for stators and rotators retains greatest diametrical dimension, makes motor have higher power density; Two ventilation openings be positioned on front end end cover and shell by drive end side circumferentially, be suitable for driving the electric motor of railcar.
Further, motor housing air channel is positioned at the inner periphery of shell and is uniformly distributed, the excircle of stator core is also evenly slotted as the flowing of air reserves passage, on the one hand stator core is directly and air contact, good cooling results, these grooves isolation stator yoke and cast iron housing, lower iron loss on the other hand; Two ventilation openings are positioned on front end end cover end face and on the excircle of front end end cover, are suitable for the electric motor of drive track EMUs vehicle.
Further, motor housing air channel is positioned at the inner periphery of shell and is uniformly distributed, and the excircle of stator core is also evenly slotted as the flowing of air reserves passage; On the one hand stator core is directly and air contact, good cooling results, and these grooves isolation stator yoke and cast iron housing, lower iron loss on the other hand; Two ventilation openings be positioned at rear end cover with shell near non-driven end side circumferentially, it is suitable for driving the electric motor of locomotive and tramway vehicle, their common feature is that requirement electric motor adopts flange to be connected with wheel casing, and ventilation opening can not be positioned on front end end cover end face.
Further, motor housing air channel is positioned at the excircle of shell, and in order to simplify containment structure and reduce weight, the wind cover that stator air channel is covered by shell realizes, and wind cover is a thin-wall stamping part; Two ventilation openings are positioned at rear end and cover with shell near non-driven end side, are suitable for industrial electro motivation, both can also install by flange by floor installation.
The useful effect of the present invention:
1. adopting the electric motor of this technology to replace open self-ventilation electric motor, owing to rotor is still open ventilation, rotor heat-sinking capability is maintained; Stator adopts closed ventilation, the working portion conduction heat-sinking capability of stator winding is constant, End winding no longer directly contacts outside air, heat radiation can be under some influence, but high-temperature zone mainly concentrates on stator winding work central interior, End winding temperature is originally much lower than the temperature of working portion central position, even if there being a little rising, but the improvement of Working environment can produce more positive impact, can avoiding the generation of a lot of insulating fault, the reliability of electric motor reaches the level of enclosed machine;
Adopt the open self-ventilation traction motor that the electric motor of this technology replaces current metro industry generally to apply, because the improvement of the Working environment of stator winding, the reliability of stator insulation is improved so that the target of traction motor 30 years design service lifes becomes practical;
Adopting the electric motor of this technology, ventilation opening only need to be installed individual layer net defence and prevent foreign matter from entering, it is not necessary to install filtration unit, eliminate the work of routine cleaning, often working 3 years, do not need dismounting and installation sequence with pressurized air is cleaning, maintenance service becomes easily simple; Owing to ventilating and cooling device does not take axial size, motor length shortens, it is possible to for staff retains bigger maintenance space.
2. adopting the electric motor of this technology to replace enclosed self-ventilated type motor, stator winding is closed Working environment, and stator insulation reliability is constant; Rotor turns into open ventilation from closed ventilation, and heat-sinking capability is strengthened, and temperature of rotor reduces, and resistance reduces, and resistance heat reduces, and efficiency is improved, and again owing to mouse cage rotor is sturdy and durable, the life and reliability of rotor can not be affected;
Adopting the enclosed self-ventilation traction motor that the electric motor of this technology replaces current low-floor tramway industry and generally applies, stator winding is closed Working environment, and stator insulation reliability is constant; Owing to raising and the axial flow combined ventilating device of rotor heat-sinking capability saves length size, it is more powerful that the power of same installation space motor can design, the difficulty that engineering design personnel solve contradiction between space, power, reliability can be reduced, make design effort become relatively easy.
3. adopting the electric motor of this technology to replace open forced ventilation electric motor, owing to stator winding is closed Working environment, stator insulation reliability can be more reliable; Owing to axial flow combined ventilating device saves length size, same installation space adopts the power of the electric motor of this technology just can reach or close to the level of open forced ventilation electric motor;
Adopt the open forced ventilation traction motor that the electric motor of this technology replaces current high ferro motor-car and locomotive generally to apply, independent blower fan and air channel that open forced ventilation traction motor needs can be exempted, and loaded down with trivial details car bottom mounting arrangements work, save a large amount of material resources manpowers; It is emphasized that the cruising speed of vehicle can not lower than middling speed, namely this technology motor is disadvantageous by long-time heavy load low speed climbing, because the ventilation of self-ventilation motor low speed is little unfavorable to heat radiation.
4. adopt front end end cover and the rear end cap of the electric motor of this technology are provided with blast inlet near bearing place or have air channel to pass through, objectively can strengthening the cooling of bearing, reduce the working temperature of bearing, lubricating grease is not easily degraded sex change, bearing becomes reliable operation more, and the life-span is improved.
Accompanying drawing explanation
Fig. 1 is the direction of principal axis sectional view of first embodiment of the invention;
Fig. 2 is the direction of principal axis sectional view of second embodiment of the invention;
Fig. 3 is the direction of principal axis sectional view of third embodiment of the invention;
Fig. 4 is the direction of principal axis sectional view of fourth embodiment of the invention;
Fig. 5 is the stereographic map of front axial fan in the present invention;
Fig. 6 is the stereographic map of axis of the present invention;
Fig. 7 is the stereographic map of rear axial fan in the present invention;
Fig. 8 is the front perspective view of first embodiment of the invention;
Fig. 9 is the rear perspective view of first embodiment of the invention;
Figure 10 is the front perspective view of second embodiment of the invention;
Figure 11 is the rear perspective view of second embodiment of the invention;
Figure 12 is the front perspective view of third embodiment of the invention;
Figure 13 is the rear perspective view of third embodiment of the invention;
Figure 14 is the front perspective view of fourth embodiment of the invention;
Figure 15 is the rear perspective view of fourth embodiment of the invention;
Figure 16 is the direction of principal axis sectional view of existing open self-ventilation electric motor;
Figure 17 is the direction of principal axis sectional view of existing enclosed self-ventilated type motor.
Figure 18 is the direction of principal axis sectional view of existing open forced ventilation electric motor.
Note: the four-headed arrow in figure represents air flow direction, because according to the difference turned to, the flow direction of air can change, so adopting four-headed arrow, but ventilation is constant would not affect cooling performance.
Embodiment
Referring now to accompanying drawing, wherein same Reference numeral represents identical or corresponding parts in whole multiple views;
Accompanying drawing 1 is the direction of principal axis sectional view of first embodiment of the invention, below with reference to the accompanying drawings 1 is described with regard to the enforcement mode of the first embodiment:
The stator air channel 2h that the feature of the first embodiment is motor housing 2 is in the width outside motor main body and highly maximum sized four angles, does not take motor circumferential size, for stators and rotators retains greatest diametrical dimension, makes motor have higher power density; Two ventilation openings be positioned on front end end cover and shell by drive end side circumferentially, be suitable for driving the electric motor of railcar;
Step 1. stator 1 comprises stator core 1a and stator winding 1b, and stator core 1a inner periphery is uniformly distributed a lot of grooves, and stator winding 1b is fixed in these grooves; Stator winding is made up of multiple coil, and each stator coil is the series connection of multi-turn, so End winding 1c is essential, is disposed in stator core two ends; Stator coil 1b needs to divide into groups and regular connection each other, so there being a lot of joint 1c, in Fig. 1, winding joint 1c has been disposed in left side drive end; Stator core is fixed on the inner periphery of shell 2 by shrink-fit, assembling mode is that shell 2 is heated to more than 200 degree, the interior hole expanded by heating of shell 2 becomes big, now stator 1 is put into shell hole by the front end of shell 2, in shell, there is the step of location position of stator in hole, and shell 2 shrinks and stator 1 is tightly embraced after cooling;
Step 2. rotor 3 comprises rotor core 3a and mouse cage coil 3b, rotor core excircle is uniformly distributed a lot of grooves, the bar-shaped sliver of mouse cage coil is inserted in the groove of rotor, a sliver is arranged in each groove, the end ring 3c of two ring-types is arranged in the two ends of rotor core, all slivers are welded together, forms the entirety of a mutual conduction;
The excircle in the mid-way of step 3. axle 4 arranges that spiral 4a provides air pressure to flow in spiral slot 4b, form one section of air channel, adopt the processing mode that spiral is integrated on axle, it is also possible to additional processing many slot segmentation 4c vertically, forms multistage turbine to increase the circulation of air; In the interior hole being inserted in rotor core 3a of axle 4, relying on shrink-fit rotor 3 to rotate by band moving axis 4, by axle head outputting power, assembling mode is heating rotor, and rotor inner hole expands, and waits and cool completely after then inserting axle, and both have just been completely fixed;
Step 4. front end end cover 5 is ductile cast iron casting, and front bearing 7 is installed in central position, and arranges rotor air channel ventilation opening 5y around centre hole on end face, and flange 5a and the fluted disc 17 of velocity sensor inside front end end cover form labyrinth seal; The working method of front end end cover is first cast blank part, then each interface coordinated with other part of machining, after checking each size qualified, knows that burr cleans after processing, waits that motor assembling uses;
After step 5., end cap 6 is ductile cast iron casting, and rear bearing 8 is installed in central position, and outer side wall and inner side-wall form one section of 6h in air channel, and the inner port edge 6a of inner side-wall and the flange 10c of rear axial fan 10 forms labyrinth seal; Working method is first cast blank part, then each interface coordinated with other part of machining, after checking each size qualified, knows that burr cleans after processing, waits that motor assembling uses;
Step 6. shell 2 is ductile cast iron casting, and interior hole is used for fixing stator 1, and the end face at two ends coordinates fixing with front end end cover 5, rear end cap 6, and corner, four, outside arranges that stator cooling air channel 2h and front end face are provided with ventilation hole 2x. Working method is first cast blank part, then each interface coordinated with other part of machining, after checking each size qualified, knows that burr cleans after processing, waits that motor assembling uses;
Step 7. front bearing 7 is a cylindrical roller bearing, and feature is that bearing inner ring can be separated separately, be also exactly bearing inner ring, outer ring motor assemble in can separate. Erection sequence is that the outer ring of front bearing 7 together with roller and is kept enclosing in the bearing chamber being pressed into front end end cover 5 central position, then assembling the labyrinth seal part 12,13,14 of bearing both sides, the effect of labyrinth seal part is solid bearing, pin lubricating grease does not leak, prevent extraneous impurity from entering bearing;
Step 8. rear bearing 8 is a deep groove ball bearing, rear bearing 8 is pressed in the bearing chamber of rear end cap 6 central position;
Before step 9., axial fan 9 is an aluminum alloy die casting, is evenly arranged spiral wind leaf 9a for air channel in circumferential direction inside and provides blast, and the space 9b between wind leaf just forms air-flow, and the maximum diameter place of left side settles velocity sensor fluted disc 17; Working method is first die-casting blank part, the coordinating size of then machining necessity; Assembling mode is that heat is enclosed within axle, and pillow block rank and rotor cage end ring 3c are supported in right side simultaneously;
After step 10., axial fan 10 is an aluminum alloy die casting, it is evenly arranged spiral wind leaf 10a for air channel in circumferential direction inside and blast is provided, space 10b between wind leaf just forms air-flow, and the inner port edge 6a of rear end cap inner side-wall and the flange 10c of rear axial fan 10 forms labyrinth seal; Working method is first die-casting blank part, the coordinating size of then machining necessity; Assembling mode is that heat is enclosed within axle, and pillow block rank and rotor core end face are supported in left side simultaneously;
Step 11. velocity sensor chi dish 17 needs velocity sensor detection rotating speed for the traction motor of track traffic, and velocity sensor is fixed on end cap, and in Fig. 1, velocity sensor is fixed on the end face of front end end cover 5. Velocity sensor chi dish 17 is an iron hoop, is fixed on the maximum diameter place of the left side of front axial fan 9, fluted disc end face machined tooth and groove. When velocity sensor chi dish 17 rotates with front axial fan 9, the velocity sensor near tooth and groove just can sense according to eddying effect, distinguishes out speed speed and turns to;
The assembling of step 12. rotor/shaft assembly and rear bearing and rear end cap is that axle and rotor are vertically placed, and rear end is upward; With industry air duct heating rear bearing inner ring to after 120 degree, rear bearing being enclosed within together with rear end cap the rear end of axle; The locking plate 15 of finally assembling upper locking bearing inner ring and the step cover 16 of lock shaft bearing outer-ring;
The front end end cover being equipped with front bearing is fixed together by step 13. with the shell bolts assemblies being equipped with stator;
The stator that the rotor completed/rear end-cap assembly has been inserted by step 14./front end end cover assembly;
Front bearing inner ring locking circle 11 joined by step 15. shrink-on, finally notes lubricating grease in front and back bearings;
Step 16. is installed four wind covers 18 and is formed complete air channel; Stator cooling air channel consist of 2x, 2h, 6h, rotor cooling air channel consist of 5y, 9b, 4b, 10b, two cooling air channels are connected mutually, jointly by spiral combination unit provide blast.
Accompanying drawing 2 is the direction of principal axis sectional view of second embodiment of the invention, below with reference to the accompanying drawings 2 is described with regard to the enforcement mode of the 2nd embodiment:
The feature of the 2nd embodiment is that motor housing air channel 2h is positioned at the inner periphery of shell 2 and is uniformly distributed, the excircle of the stator core 1h that evenly slots is that the flowing of air reserves passage, on the one hand stator core is directly and air contact, good cooling results, these grooves isolation stator yoke and cast iron housing, lower iron loss on the other hand; Two ventilation openings are the 5x on the excircle of the 5y on front end end cover end face and front end end cover respectively, are suitable for the electric motor of drive track EMUs vehicle;
The enforcement mode of the 2nd embodiment is relative to the difference of the enforcement mode of the first embodiment, and due to stator ventilation hole portion in the enclosure, it is not necessary to wind outside cover, so not needing step 16, other step is all identical.
Accompanying drawing 3 is the direction of principal axis sectional view of third embodiment of the invention, below with reference to the accompanying drawings 3 is described with regard to the enforcement mode of the 3rd embodiment:
The feature of the 3rd embodiment is that motor housing air channel 2h is positioned at the inner periphery of shell 2 and is uniformly distributed, and the flowing that also evenly fluting is air of the excircle of stator core reserves passage; On the one hand stator core is directly and air contact, good cooling results, and these grooves isolation stator yoke and cast iron housing, lower iron loss on the other hand; Two ventilation openings are the 6y that covers of rear end and the shell 2x circumferentially near non-driven end side respectively, it is suitable for driving the electric motor of locomotive and tramway vehicle, their common feature is that requirement electric motor adopts flange to be connected with wheel casing, and ventilation opening can not be positioned on front end end cover end face;
The enforcement mode of the 3rd embodiment is relative to the difference of the enforcement mode of the first embodiment, stator puts into the hole of shell by the rear end of shell and located by the step in hole in step 1, then by the interior hole of empty air casing 19 shell of rear end press-in of shell and withstand stator aft end face; Due to stator ventilation hole portion in the enclosure, it is not necessary to wind outside cover, so not needing step 16, other step is all identical with the enforcement mode of the first embodiment.
Accompanying drawing 4 is the direction of principal axis sectional view of fourth embodiment of the invention, below with reference to the accompanying drawings 4 is described with regard to the enforcement mode of the 4th embodiment:
The feature of the 4th embodiment is the excircle that motor housing air channel 2h is positioned at shell 2, and in order to simplify containment structure and reduce weight, the wind cover 20 that stator air channel is covered by shell realizes, and wind cover 20 is a thin-wall stamping part; Two ventilation openings are the 6y that covers of rear end and the shell 20x near non-driven end side respectively, are suitable for industrial electro motivation, and being both suitable for floor installation can also install by flange;
The enforcement mode of the 4th embodiment is relative to the difference of the enforcement mode of the first embodiment, and stator puts into the hole of shell by the rear end of shell and located by the step in hole in step 1; Owing to stator ventilation hole is in housing exterior, the wind cover 20 that stator air channel is covered by shell realizes, thus step 16 install be wind cover 20, other step is all identical with the enforcement mode of the first embodiment.
Adopting the electric motor of this technology to replace open self-ventilation electric motor, owing to rotor is still open ventilation, rotor heat-sinking capability is maintained; Stator adopts closed ventilation, the working portion conduction heat-sinking capability of stator winding is constant, End winding no longer directly contacts outside air, heat radiation can be under some influence, but high-temperature zone mainly concentrates on stator winding work central interior, End winding temperature is originally much lower than the central position of working portion, even if there being a little rising, but the improvement of Working environment can produce more positive impact, can avoiding the generation of a lot of insulating fault, the reliability of electric motor reaches the level of enclosed machine;
Adopt the open self-ventilation traction motor that the electric motor of this technology replaces current metro industry generally to apply, because the improvement of the Working environment of stator winding, the reliability of stator insulation is improved so that the target of traction motor 30 years design service lifes becomes practical;
Adopting the electric motor of this technology, ventilation opening only need to be installed individual layer net defence and prevent foreign matter from entering, it is not necessary to installs filtration unit, eliminates the work of routine cleaning, often work 3 years, and with pressurized air Simple cleaning, maintenance service becomes easily simple; Owing to ventilating and cooling device does not take axial size, motor length shortens, it is possible to for staff retains bigger maintenance space;
Adopting the electric motor of this technology to replace enclosed self-ventilated type motor, stator winding is closed Working environment, and stator insulation reliability is constant; Rotor turns into open ventilation from closed ventilation, and heat-sinking capability is strengthened, and temperature of rotor reduces, and resistance reduces, and resistance heat reduces, and efficiency is improved;
Adopting the enclosed self-ventilation traction motor that the electric motor of this technology replaces current low-floor tramway industry and generally applies, stator winding is closed Working environment, and stator insulation reliability is constant; Owing to raising and the axial flow combined ventilating device of rotor heat-sinking capability saves length size, it is more powerful that the power of same installation space motor can design, the difficulty that engineering design personnel solve contradiction between space, power, reliability can be reduced, make design effort become relatively easy;
Adopting the electric motor of this technology to replace open forced ventilation electric motor, turn into the Working environment closed due to stator winding, stator insulation reliability can be more reliable; Owing to axial flow combined ventilating device saves length size, same installation space adopts the power of the electric motor of this technology just can reach or close to the level of open forced ventilation electric motor;
Adopting the electric motor of this technology to replace, current high ferro motor-car and locomotive generally apply is open forced ventilation traction motor, independent blower fan and air channel that open forced ventilation traction motor needs can be exempted, and loaded down with trivial details mounting arrangements work, save material resources manpower;
Front end end cover and the rear end cap of the electric motor of this technology is adopted to be provided with blast inlet near bearing place or have air channel to pass through, objectively can strengthening the cooling of bearing, bearing operating temperatures is low, and lubricating grease is not easily degraded sex change, bearing becomes reliable operation more, and bearing life is improved;
The announcement of book and instruction according to the above description, above-mentioned enforcement mode can also be changed and revise by those skilled in the art in the invention. Therefore, it is intended that the invention not be limited to embodiment disclosed and described above, some modifications and changes invented also should be fallen in the protection domain of claim of the present invention. In addition, although employing some specific terms in this specification sheets, but these terms are just for convenience of description, and the present invention does not form any restriction.
Claims (10)
1. adopt axial flow to ventilate and realize the electric motor that the open draft type with rotor closed by stator, it is characterised in that:
The outside of motor is that shell (2), front end end cover (5), rear end cap (6) tighten together and form a cavity;
Stator (1) comprises stator core (1a) and stator winding (1b), and stator winding (1b) is fixed in the equally distributed groove of stator core (1a) inner periphery; The End winding (1c) of stator is arranged in stator core two ends; Connection joint (1d) between multiple coils of composition stator winding has been placed in the side of left end winding; Stator core (1a) is fixed on the inner periphery of shell (2) by shrink-fit;
Front bearing (7) is arranged on the central position of front end end cover (5), and there is the labyrinth gland of responsible solid bearing left and right;
Rear bearing (8) is arranged on the central position of rear end cap (6), and there is the labyrinth gland of responsible solid bearing left and right;
Axle (4) is placed in the centre hole of front bearing (7) and rear bearing (8), rely on two bearings realize 2 support rotate freely ability;
Rotor (3) comprises rotor core (3a) and mouse cage winding (3b), and mouse cage winding (3b) is fixed in the equally distributed groove of rotor core (3a) excircle; Mouse cage end ring (3c) is arranged in the both sides of rotor core (3a); Rotor core inner hole sleeve, in the mid-way of axle, relies on shrink-fit to rotate by band moving axis, by axle head outputting power;
The flange (5a) of front end end cover (5) forms labyrinth seal with velocity sensor fluted disc (17), the flange (10c) of rear axial fan (10) and the flange (6a) of rear end cap (6) form labyrinth seal, this two places cooperation position separates stator winding and air channel, for reaching the open ventilating and cooling of rotor, the closed ventilating and cooling of stator becomes possibility;
The stator air channel (2h) of motor housing (2) is in the width outside motor main body and highly maximum sized four angles, does not take motor circumferential size, for stators and rotators retains maximum space, has higher power density;
The excircle of the middle maximum diameter section of axle (4) is provided with spiral slot (4b), and front axial fan (9) and rear axial fan (10) are arranged in the both sides of the spiral section of axle; The wind leaf of two axial fans is also spiral device and identical with the hand of spiral of the spiral slot on axle; When the rotor rotates, three groups of spiral devices on three parts produce the superposition of wind-force, promote air to flow in air channel; Changing if rotor turns to, wind direction also changes, but does not affect motor cooling; The axial size that this kind of axial flow combination refrigerating unit does not take motor does not need the radial dimension of expanded motor yet so that the profile of motor is compacter; According to the needs of cooling air quantity and blast, and simplify structure, it is possible to any combination being used alone in the spiral section of axle or itself and forward and backward axial fan;
Consisting of (2x) of stator cooling air channel, (2h), (6h), consisting of (5y) of rotor cooling air channel, (9b), (4b), (10b), two cooling air channels are connected mutually, jointly provide blast by spiral combination unit;
Blast inlet (5y) is had near front bearing (7) place at front end end cover (5); Rear axial fan (10) has wrapped up the installation position of the rear bearing (8) of rear end cap (6), objectively can strengthen the cooling of forward and backward bearing, it is to increase the life-span of bearing;
Velocity sensor fluted disc (11) is put in this position and does not additionally take motor axial length, is conducive to motor shaft to compact dimensions; If not needing velocity sensor, it is possible to cancel this part, suitably before amendment, the flange of axial fan (9) reaches the effect of labyrinth seal.
2. adopt axial flow to ventilate and realize the electric motor that the open draft type with rotor closed by stator, it is characterised in that:
The outside of motor is that shell (2), front end end cover (5), rear end cap (6) tighten together and form a cavity;
Stator (1) comprises stator core (1a) and stator winding (1b), and stator winding (1b) is fixed in the equally distributed groove of stator core (1a) inner periphery; The End winding (1c) of stator is arranged in stator core two ends; Connection joint (1d) between multiple coils of composition stator winding has been placed in the side of left end winding; Stator core (1a) is fixed on the inner periphery of shell (2) by shrink-fit;
Front bearing (7) is arranged on the central position of front end end cover (5), and there is the labyrinth gland of responsible solid bearing left and right;
Rear bearing (8) is arranged on the central position of rear end cap (6), and there is the labyrinth gland of responsible solid bearing left and right;
Axle (4) is placed in the centre hole of front bearing (7) and rear bearing (8), rely on two bearings realize 2 support rotate freely ability;
Rotor (3) comprises rotor core (3a) and mouse cage winding (3b), and mouse cage winding (3b) is fixed in the equally distributed groove of rotor core (3a) excircle; Mouse cage end ring (3c) is arranged in the both sides of rotor core (3a); Rotor core inner hole sleeve, in the mid-way of axle, relies on shrink-fit to rotate by band moving axis, by axle head outputting power;
The flange (5a) of front end end cover (5) forms labyrinth seal with velocity sensor fluted disc (17), the flange (10c) of axial fan (10) and the flange (6a) of rear end cap (6) form labyrinth seal, this two places cooperation position separates stator winding and air channel, for reaching the open ventilating and cooling of rotor, the closed ventilating and cooling of stator becomes possibility;
Motor housing air channel (2h) is positioned at the inner periphery of shell (2) and is uniformly distributed, and the excircle of stator core is evenly slotted as the flowing of air reserves passage; On the one hand stator core is directly and air contact, good cooling results, and these grooves isolation stator yoke and cast iron housing, lower iron loss on the other hand;
The excircle of the middle maximum diameter section of axle (4) is provided with spiral slot (4b), and front axial fan (9) and rear axial fan (10) are arranged in the both sides of the spiral section of axle; The wind leaf of two axial fans is also spiral device and identical with the hand of spiral of the spiral slot on axle; When the rotor rotates, three groups of spiral devices on three parts produce the superposition of wind-force, promote air to flow in air channel; Changing if rotor turns to, wind direction also changes, but does not affect motor cooling; The axial size that this kind of axial flow combination refrigerating unit does not take motor does not need the radial dimension of expanded motor yet so that the profile of motor is compacter; According to the needs of cooling air quantity and blast, and simplify structure, it is possible to any combination being used alone in the spiral section of axle or itself and forward and backward axial fan;
Consisting of (5x) of stator cooling air channel, (1h), (2h), (6h), consisting of (5y) of rotor cooling air channel, (9b), (4b), (10b), two cooling air channels are connected mutually, jointly provide blast by spiral combination unit;
Blast inlet (5y) is had near front bearing (7) place at front end end cover (5); Rear axial fan (10) has wrapped up the installation position of the rear bearing (8) of rear end cap (6), objectively can strengthen the cooling of forward and backward bearing, it is to increase the life-span of bearing;
Velocity sensor fluted disc (11) is put in this position and does not additionally take motor axial length, is conducive to motor shaft to compact dimensions; If not needing velocity sensor, it is possible to cancel this part, suitably the flange of the left axial fan of amendment (9) reaches the effect of labyrinth seal.
3. adopt axial flow to ventilate and realize the electric motor that the open draft type with rotor closed by stator, it is characterised in that:
The outside of motor is that shell (2), front end end cover (5), rear end cap (6) tighten together and form a cavity;
Stator (1) comprises stator core (1a) and stator winding (1b), and stator winding (1b) is fixed in the equally distributed groove of stator core (1a) inner periphery; The End winding (1c) of stator is arranged in stator core two ends; Connection joint (1d) between multiple coils of composition stator winding has been placed in the side of right-hand end winding; Stator core (1a) is fixed on the inner periphery of shell (2) by shrink-fit;
Front bearing (7) is arranged on the central position of front end end cover (5), and there is the labyrinth gland of responsible solid bearing left and right;
Rear bearing (8) is arranged on the central position of rear end cap (6), and there is the labyrinth gland of responsible solid bearing left and right;
Axle (4) is placed in the centre hole of front bearing (7) and rear bearing (8), rely on two bearings realize 2 support rotate freely ability;
Rotor (3) comprises rotor core (3a) and mouse cage winding (3b), and mouse cage winding (3b) is fixed in the equally distributed groove of rotor core (3a) excircle; Mouse cage end ring (3c) is arranged in the both sides of rotor core (3a); Rotor core inner hole sleeve, in the mid-way of axle, relies on shrink-fit to rotate by band moving axis, by axle head outputting power;
The flange (5a) of front end end cover (5) and the flange (9c) of front axial fan (9) form labyrinth seal, the flange (10c) of rear axial fan (10) and the flange (6a) of rear end cap (6) form labyrinth seal, this two places cooperation position separates stator winding and air channel, for reaching the open ventilating and cooling of rotor, the closed ventilating and cooling of stator becomes possibility;
Motor housing air channel (2h) is positioned at the inner periphery of shell (2) and is uniformly distributed, and the excircle of stator core is also evenly slotted as the flowing of air reserves passage; On the one hand stator core is directly and air contact, good cooling results, and these grooves isolation stator yoke and cast iron housing, lower iron loss on the other hand;
The excircle of the middle maximum diameter section of axle (4) is provided with spiral slot (4b), and front axial fan (9) and rear axial fan (10) are arranged in the both sides of the spiral section of axle; The wind leaf of two axial fans is also spiral device and identical with the hand of spiral of the spiral slot on axle; When the rotor rotates, three groups of spiral devices on three parts produce the superposition of wind-force, promote air to flow in air channel; Changing if rotor turns to, wind direction also changes, but does not affect motor cooling; The axial size that this kind of axial flow combination refrigerating unit does not take motor does not need the radial dimension of expanded motor yet so that the profile of motor is compacter; According to the needs of cooling air quantity and blast, and simplify structure, it is possible to any combination being used alone in the spiral section of axle or itself and forward and backward axial fan;
Consisting of (2x) of stator cooling air channel, (1h), (2h), (5h), consisting of (6y) of rotor cooling air channel, (10b), (4b), (9b), two cooling air channels are connected mutually, jointly provide blast by spiral combination unit;
Front axial fan (9) has wrapped up the installation position of the front bearing (7) of front end end cover (5); Blast inlet (6y) is had near rear bearing (8) place at rear end cap (6); Objectively can strengthen the cooling of forward and backward bearing, it is to increase the life-span of bearing.
4. adopt axial flow to ventilate and realize the electric motor that the open draft type with rotor closed by stator, it is characterised in that:
The outside of motor is that shell (2), front end end cover (5), rear end cap (6) tighten together and form a cavity;
Stator (1) comprises stator core (1a) and stator winding (1b), and stator winding (1b) is fixed in the equally distributed groove of stator core (1a) inner periphery; The End winding (1c) of stator is arranged in stator core two ends; Connection joint (1d) between multiple coils of composition stator winding has been placed in the side of right-hand end winding; Stator core (1a) is fixed on the inner periphery of shell (2) by shrink-fit;
Front bearing (7) is arranged on the central position of front end end cover (5), and there is the labyrinth gland of responsible solid bearing left and right;
Rear bearing (8) is arranged on the central position of rear end cap (6), and there is the labyrinth gland of responsible solid bearing left and right;
Axle (4) is placed in the centre hole of front bearing (7) and rear bearing (8), rely on two bearings realize 2 support rotate freely ability;
Rotor (3) comprises rotor core (3a) and mouse cage winding (3b), and mouse cage winding (3b) is fixed in the equally distributed groove of rotor core (3a) excircle; Mouse cage end ring (3c) is arranged in the both sides of rotor core (3a); Rotor core inner hole sleeve, in the mid-way of axle, relies on shrink-fit to rotate by band moving axis, by axle head outputting power;
The flange (5a) of front end end cover (5) and the flange (9c) of front axial fan (9) form labyrinth seal, the flange (10c) of rear axial fan (10) and the flange (6a) of rear end cap (6) form labyrinth seal, this two places cooperation position separates stator winding and air channel, for reaching the open ventilating and cooling of rotor, the closed ventilating and cooling of stator becomes possibility;
Motor housing air channel (2h) is positioned at the excircle of shell (2), and in order to simplify containment structure and reduce weight, the wind cover (20) that stator air channel is covered by shell realizes, and wind cover (20) is a thin-wall stamping part;
The excircle of the middle maximum diameter section of axle (4) is provided with spiral slot (4b), and front axial fan (9) and rear axial fan (10) are arranged in the both sides of the spiral section of axle; The wind leaf of two axial fans is also spiral device and identical with the hand of spiral of the spiral slot on axle; When the rotor rotates, three groups of spiral devices on three parts produce the superposition of wind-force, promote air to flow in air channel; Changing if rotor turns to, wind direction also changes, but does not affect motor cooling; The axial size that this kind of axial flow combination refrigerating unit does not take motor does not need the radial dimension of expanded motor yet so that the profile of motor is compacter; According to the needs of cooling air quantity and blast, and simplify structure, it is possible to any combination being used alone in the spiral section of axle or itself and forward and backward axial fan;
Consisting of (20x) of stator cooling air channel, (20h), (5h), consisting of (6y) of rotor cooling air channel, (10b), (4b), (9b), two cooling air channels are connected mutually, jointly provide blast by spiral combination unit;
Front axial fan (9) has wrapped up the installation position of the front bearing (7) of front end end cover (5); Blast inlet (6y) is had near rear bearing (8) place at rear end cap (6); Objectively can strengthen the cooling of forward and backward bearing, it is to increase the life-span of bearing.
5. employing axial flow according to the arbitrary item of claim 1-4 ventilates and realizes the electric motor that the open draft type with rotor closed by stator, it is characterized in that: axial flow combination refrigerating unit, the excircle of the middle maximum diameter section of axle (4) is provided with spiral slot (4b), and front axial fan (9) and rear axial fan (10) are arranged in the both sides of the spiral section of axle; The wind leaf of two axial fans is also spiral device and identical with the hand of spiral of the spiral slot on axle; When the rotor rotates, three groups of spiral devices on three parts produce the superposition of wind-force, promote air to flow in air channel; Changing if rotor turns to, wind direction also changes, but does not affect motor cooling; The axial size that this kind of axial flow combination refrigerating unit does not take motor does not need the radial dimension of expanded motor yet so that the profile of motor is compacter; According to the needs of cooling air quantity and blast, and simplify structure, it is possible to any combination being used alone in the spiral section of axle or itself and forward and backward axial fan.
6. employing axial flow according to the arbitrary item of claim 1-4 ventilates and realizes the electric motor that the open draft type with rotor closed by stator, it is characterised in that: namely the spiral on axle excircle can be integrated on the excircle of motor shaft, is a part for axle; Spiral can also adopt and the form of axle split, adopts the whisker of square-section, and heat is set on the excircle of axle to realize identical function, reduces material and machining cost; Adopt the processing mode that spiral is integrated on axle, it is also possible to additional processing many slot segmentation (4c) vertically, forms multistage turbine to increase the circulation of air.
7. employing axial flow according to claim 1 ventilates and realizes the electric motor that the open draft type with rotor closed by stator, it is characterized in that: the stator air channel (2h) of motor housing (2) is in the width outside motor main body and highly maximum sized four angles, do not take motor circumferential size, for stators and rotators retains greatest diametrical dimension, motor is made to have higher power density; Two ventilation openings be positioned on front end end cover and shell by drive end side circumferentially, be suitable for driving the electric motor of railcar.
8. employing axial flow according to claim 2 ventilates and realizes the electric motor that the open draft type with rotor closed by stator, it is characterized in that: motor housing air channel (2h) is positioned at the inner periphery of shell (2) and is uniformly distributed, the excircle of stator core is also evenly slotted as the flowing of air reserves passage, on the one hand stator core is directly and air contact, good cooling results, these grooves isolation stator yoke and cast iron housing, lower iron loss on the other hand; Two ventilation openings are positioned on front end end cover end face and on the excircle of front end end cover, are suitable for the electric motor of drive track EMUs vehicle.
9. employing axial flow according to claim 3 ventilates and realizes the electric motor that the open draft type with rotor closed by stator, it is characterized in that: motor housing air channel (2h) is positioned at the inner periphery of shell (2) and is uniformly distributed, the excircle of stator core is also evenly slotted as the flowing of air reserves passage; On the one hand stator core is directly and air contact, good cooling results, and these grooves isolation stator yoke and cast iron housing, lower iron loss on the other hand; Two ventilation openings be positioned at rear end cover with shell near non-driven end side circumferentially, it is suitable for driving the electric motor of locomotive and tramway vehicle, their common feature is that requirement electric motor adopts flange to be connected with wheel casing, and ventilation opening can not be positioned on front end end cover end face.
10. employing axial flow according to claim 4 ventilates and realizes the electric motor that the open draft type with rotor closed by stator, it is characterized in that: motor housing air channel (2h) is positioned at the excircle of shell (2), in order to simplify containment structure and reduce weight, the wind cover (20) that stator air channel is covered by shell realizes, and wind cover (20) is a thin-wall stamping part; Two ventilation openings are positioned at rear end and cover with shell near non-driven end side, are suitable for industrial electro motivation, both can also install by flange by floor installation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610157490.5A CN105634210B (en) | 2016-03-17 | 2016-03-17 | The motor of stator closing with the open draft type of rotor is realized using axis circulation wind |
| CN201810740861.1A CN108923587B (en) | 2016-03-17 | 2016-03-17 | Electric motor |
| CN201810740840.XA CN108808986B (en) | 2016-03-17 | 2016-03-17 | Electric motor |
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| CN201610157490.5A CN105634210B (en) | 2016-03-17 | 2016-03-17 | The motor of stator closing with the open draft type of rotor is realized using axis circulation wind |
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| CN201810740840.XA Division CN108808986B (en) | 2016-03-17 | 2016-03-17 | Electric motor |
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| CN201810740840.XA Active CN108808986B (en) | 2016-03-17 | 2016-03-17 | Electric motor |
| CN201810740861.1A Expired - Fee Related CN108923587B (en) | 2016-03-17 | 2016-03-17 | Electric motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106208584A (en) * | 2016-08-13 | 2016-12-07 | 中车永济电机有限公司 | A kind of totally-enclosed self-ventilation magneto |
| CN106208499A (en) * | 2016-08-13 | 2016-12-07 | 中车永济电机有限公司 | A kind of full-enclosed permanent-magnet motor ventilation cooling structure |
| CN106357037A (en) * | 2016-10-09 | 2017-01-25 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor and motor |
| CN106374661A (en) * | 2016-10-08 | 2017-02-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor assembly and motor |
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| CN106208499A (en) * | 2016-08-13 | 2016-12-07 | 中车永济电机有限公司 | A kind of full-enclosed permanent-magnet motor ventilation cooling structure |
| CN106208584A (en) * | 2016-08-13 | 2016-12-07 | 中车永济电机有限公司 | A kind of totally-enclosed self-ventilation magneto |
| CN106374661B (en) * | 2016-10-08 | 2019-01-04 | 珠海格力电器股份有限公司 | Rotor assembly and motor |
| CN106374661A (en) * | 2016-10-08 | 2017-02-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor assembly and motor |
| CN106357037A (en) * | 2016-10-09 | 2017-01-25 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor and motor |
| CN106738323A (en) * | 2017-02-21 | 2017-05-31 | 王宏保 | Portable mixed mud mixer |
| CN109586508A (en) * | 2017-09-29 | 2019-04-05 | 日本电产株式会社 | Axial magnetic flux motor and electric device |
| 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 |
| US11505218B2 (en) * | 2018-01-26 | 2022-11-22 | Bombardier Transportation Gmbh | Cooling of an electric motor |
| CN111630756A (en) * | 2018-01-26 | 2020-09-04 | 勃姆巴迪尔运输有限公司 | Electric machine |
| CN111630756B (en) * | 2018-01-26 | 2024-01-30 | 勃姆巴迪尔运输有限公司 | Motor with a motor housing |
| CN108155757A (en) * | 2018-02-07 | 2018-06-12 | 河南宝天机电科技有限公司 | A kind of ventilated type motor |
| CN108155737A (en) * | 2018-02-07 | 2018-06-12 | 河南宝天机电科技有限公司 | A kind of motor of Low gullet torque |
| CN108312018A (en) * | 2018-03-07 | 2018-07-24 | 浙江亚特电器有限公司 | A kind of hand held electric tool |
| CN108312018B (en) * | 2018-03-07 | 2023-10-13 | 浙江亚特电器股份有限公司 | Hand-held electric tool |
| CN110581621A (en) * | 2018-06-07 | 2019-12-17 | 东芝三菱电机产业系统株式会社 | Totally enclosed rotating electrical machine, frame structure, and method for designing frame structure |
| CN110798013A (en) * | 2018-08-03 | 2020-02-14 | 岳克森 | Turbofan rotor motor |
| CN111654135B (en) * | 2020-06-22 | 2022-03-11 | 浙江闽立电动工具有限公司 | Interior heat dissipation formula DC brushless motor and hand-held type lithium electric tool |
| CN111654135A (en) * | 2020-06-22 | 2020-09-11 | 浙江闽立电动工具有限公司 | Interior heat dissipation formula DC brushless motor and hand-held type lithium electric tool |
| CN112104119A (en) * | 2020-09-15 | 2020-12-18 | 华育昌(肇庆)智能科技研究有限公司 | Permanent magnet synchronous motor high-strength laminated motor rotor |
| WO2022142998A1 (en) * | 2020-12-30 | 2022-07-07 | 苏州凯航电机有限公司 | Motor and cleaning device |
| CN113541381A (en) * | 2021-07-06 | 2021-10-22 | 中车株洲电机有限公司 | Permanent magnet motor and rail locomotive |
| WO2023015750A1 (en) * | 2021-08-11 | 2023-02-16 | 深圳市一诺微特电机有限公司 | Double-channel, spiral-type, efficient heat dissipation motor structure |
| CN113937953A (en) * | 2021-10-22 | 2022-01-14 | 中车株洲电机有限公司 | Active air supply cooling permanent magnet motor and electric locomotive |
| CN114389398A (en) * | 2022-01-19 | 2022-04-22 | 湖南中车尚驱电气有限公司 | Diffusion end cover and motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108808986A (en) | 2018-11-13 |
| CN108808986B (en) | 2020-08-11 |
| CN108923587B (en) | 2020-06-30 |
| CN105634210B (en) | 2018-11-27 |
| CN108923587A (en) | 2018-11-30 |
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