CN1304203A - Heat-sinking capability enhanced electric motor cooled by fan - Google Patents

Abstract

The present invention relates to an electric motor, including a shell body and a fan mounted on the exterior of shell body for making airflow pass through the shell body. The external surface of the shell body possesses several radiating fins, and its internal surface inctudes several radiating ribs. These radiating fins and radiating ribs can be used for raising heat-dissipation efficiency of motor. Several air deflectors are used for guiding at least a part of air flowed over the end of motor which is opposite to the fan, and an internal deflector is fixed on the shell body for guiding a part of air flow to make it flow over stator and radiating ribs.

Description

Strengthen the fan cooled electric notor of heat radiation

The present invention relates generally to electric notor, relates in particular to the fan cooled electric notor that strengthens heat radiation.

The fan cooled electric notor of totally sealing comprises a stator and a rotor, and they are encapsulated to prevent the infringement of harmful substance in the operational environment.This motor comprises a motor driven external fan that is installed on the armature spindle anti-drive end.This fan is installed in the fan guard, and the guiding cooling air flows through the outer surface of this motor shell.

Axial end at rotor forms a fan inside, circulates in motor with the promotion air, and strengthens the heat radiation to surrounding environment from internal part.This air circulation has been encouraged the heat radiation to housing, for example end shield from internal part.

The fan cooled electric notor of totally sealing is to constitute like this, makes outside mounted fan that air is moved past the outer surface of housing, and gets rid of heat substantially by convection current.The loss that produces in machine is transferred to the inner surface of housing by compound convection current and heat conduction.The heat radiation of motor is internal convection and the heat conduction synthesis result with outside convection current.Because there is not the extraneous air motor of flowing through, these motors, especially size are greater than the motor of hundreds of horsepower, and in most of the cases their rated power is subjected to the restriction of temperature.

Therefore, be desirable to provide a kind of fan cooled electric notor of totally sealing that strengthens heat radiation, so that on the machine of a fixed dimension, improve power output.In addition, wish to strengthen heat radiation, and make a kind of reduced size and the known fan cooled electric notor of totally sealing is compared the motor with identical power.

The purpose of these and other is totally sealed the fan cooled electric notor by one and is reached, and it comprises a housing with the guard shield that comprises first and second ends.One first end shield is loaded on the first cover end, and one second end shield is loaded on the second cover end.This first and second end shield comprises the bearing spider that bearing is housed in it.This housing also comprises an outer surface and the inner surface with some heat radiation thorns with some fin.These fin and heat radiation thorn have strengthened the heat radiation of motor.

One stator is installed in the housing, and comprises a stator core with a through hole.One motor is installed in the housing with rotary way, and passes this stator hole.This rotor comprises a rotor core and a straight substantially axle that passes this rotor core hole with a through hole.This armature spindle is supported with rotatable method by bearing.This stator and rotor are configured than close more close first end shield of second end shield.This rotor core has an end ring at each axle head.Heat radiation thorn in these end ring constitute, they have promoted the air circulation at least a portion of shell inner surface.An interior baffler is fixed in the inside of housing.Air stream is directed at this heat radiation thorn from a slice at least of inner fin by this baffler.

This motor also comprises a fan that is installed on armature spindle and externally is placed in this first end shield.This external fan does not comprise a supporting bracket.This fan is installed in the fan guard, and the latter is directed at air stream the outer surface of guard shield from fan.Should be configured to square by outer fin, they comprise that some corners and at least one are in the gas operated device on each corner.This housing also comprises some air wind deflectors, to guide at least a portion air on the second end shield face.

This fan cooled electric notor of totally sealing is because the heat radiation thorn that has comprised in the housing has strengthened heat radiation.In addition, be in the gas operated device of outside and wind deflector and strengthened heat radiation on the housing outer surface owing to more air being directed to from outer fin place.The enhancing of these heat radiations allows to obtain more horsepower from less motor.

Fig. 1 is the simple shape sectional elevation of totally sealing the fan cooled electric notor according to one embodiment of the invention;

Fig. 2 is the sketch of known technology fan;

Fig. 3 is the local sketch of motor shown in Figure 1;

Fig. 4 A is a local sketch of totally sealing the fan cooled electric notor, illustrates radially fin arrangement;

Fig. 4 B is that fin shown in Fig. 4 A is along the sketch of motor length;

Fig. 5 A is the local sketch of motor shown in Figure 1, and diagram quadrant fin is arranged;

Fig. 5 B is that fin shown in Fig. 5 A is along the sketch of the length of motor shown in Figure 1;

Fig. 6 is the top view of first end shield of electric notor shown in Figure 1;

Fig. 7 is the cross section of end shield shown in Fig. 6 along A-A;

Fig. 8 is the sketch of the heat radiation thorn on the inner surface of motor shell shown in Figure 1;

Fig. 9 is a sketch of totally sealing the rib on the inner surface of fan cooled electric notor housing at known technology;

Figure 10 is the local sketch that has the electric notor of known technology pipeline terminal box;

Figure 11 is the end view according to the motor of another embodiment;

Figure 12 is the top view of motor shown in Figure 11;

Figure 13 is the axially sub together local sketch of centering of known technology;

Figure 14 is the local sketch according to the skew stator core of another embodiment;

Figure 15 is the curve along the speed of electric notor outside and convection current axial-temperature gradient.

Fig. 1 is a sketch of totally sealing fan cooled electric notor 100, and it comprises a housing 102, and housing is equipped with the guard shield 104 with first end 106 and second end 108.Housing 102 also comprises first end shield 110 and second end 112.First end shield 110 is loaded on guard shield first end 106, and second end shield 112 is loaded on guard shield second end 108.First and second end shields 110 and 112 comprise the bearing spider that bearing 116 is housed.Housing 102 also comprises an inner surface 118 and an outer surface 120.Outer surface 120 comprises some fin 122, also will be described in more detail below.

Motor 100 also comprises the stator 124 and the stator core 126 that has by the hole 128 of core 126 that are contained in the housing 102.Rotor 130 comprises a rotor core 132 and a rotor hole 134 by rotor core 132.One straight substantially axle 136 passes rotor core 134, and is supported in rotatable mode by bearing 116.One fan 138 is loaded on the armature spindle 136, for the outside of end shield 110.Fan 138 produces air stream 140, and this air-flow flows through the outer surface 120 of housing 102 along fin 122.One fan guard 142 disposes around fan 138, along fin 122 air-flow 140 is guided on the guard shield 104.In one embodiment, fan guard 142 is connected in end shield 110.Some air wind deflectors 144 are arranged on the outer surface 120, when air stream 140 when second ends 108 of guard shield 104 flow out, air stream 140 is guided to end shield 112.In one embodiment, air wind deflector 144 for example uses bolt in housing 102.Perhaps, air wind deflector 144 can be made of housing outer surface 120, and can be integral with it.In one embodiment, air wind deflector 144 comprises three straight parts that make it to have total bent configuration with the angle connection.Certainly, other configuration can comprise a single bend, two or four or more straight portion, or two straight portions that connected by a bend.Fin 122 and air wind deflector 144 also will be described in more detail below.

Rotor core 132 comprises one first end 146 and one second end 148.Every end 146,148 comprises an end cup 150,152 respectively.In one embodiment, end ring 150 constitutes a fan inside 154.One inner baffler 156 is configured in the air stream 158 of fan 154, and guiding air stream 158 is to strengthen the heat radiation from motor 100 internal parts.Baffler 156 is from fan 154 guiding air stream 158 at least a portion to stator core 124, for example to the end of stator core 124.Air stream 158 is directed at least a portion that flows through first end shield 110 then, then turns back to fan 154.110 circular flows of getting back to the air stream 158 of fan 154 have then strengthened the heat radiation to surrounding environment from stator core 124 to stator core 124 to end shield from fan 154.Perhaps, another baffler can be arranged between end ring second end 152 and the end shield 112.

By means of a plurality of fin 160 on the housing 102, can also further strengthen heat radiation.On inner surface 118, form heat radiation thorn 160, and on end shield 110, axially stretch out.In addition, heat radiation thorn 160 also can form on end shield 112.Below heat radiation thorn 160, also to be illustrated in more detail.In one embodiment, baffler 156 is for example with bolt or be weldingly fixed on the inner surface 118 of housing 102.Perhaps, baffler 156 can with housing 102 cast solids.In one embodiment, baffler 156 comprises the straight portion that is connected by a turn of bilge.Certainly, other configuration also comprises a single turn of bilge or a plurality of straight portion.

Fig. 2 is the simple of the known whole fan end of sealing fan cooled electric notor 162.Motor comprises end shield 164, one fans, 166, one fan support plates 168 and a fan guard 170.Fan 166 is connected on the rotation axis (not shown) of passing end shield 164.Along with the rotation of fan 166,, and be directed to the outer surface (not shown) that flows through motor shell from fan 166 air-outs stream 172.

Fig. 3 is the sketch by first end 106 of the motor 100 of one embodiment of the invention.The fan end of motor 100 comprises end shield 110, fan 138 and fan guard 142.Fan guard 142 and end shield 110 guiding or change air flow 140 directions, make it flow through the housing (not shown), increase the air stream flow 140 of discharging from fan guard 142, and flow through the fin (not shown) of housing effectively.In detail, the fin on the end shield 110 can be arranged to guide or to align the air stream 140 that flows through end shield 110 and housing.The validity of end shield fin improves owing to saved support plate and the utilization outer surface as the end shield of support plate from fan 138.

Fig. 4 A, 4B and 5A, 5B are respectively the fin 174 of arranged radially and the sketch of the fin 176 that quadrant is arranged.Housing 102 can be cast together with the fin 170 of arranged radially or with the fin 176 that quadrant is arranged.Foundry engieering requires to have a draft angle.Under the situation of arranged radially fin 174, draft angle 178 has formed the relative fin thickness 180 that thickens along housing 102 length vertically.That is to say that fin thickness 180 can increase along a part of length according to used mold or pattern.When this pattern or mold comprised the fin 176 that quadrant arranges, draft angle 182 was along roughly radially very little, or do not require draft angle vertically.During the interval broad of and fin 122 short when the relative length of housing 102, the inclusion relation of this arranged radially fin 174 provides the advantage that increases active zone for housing 102.Yet owing to compare with the interval of fin 122, the length to axial of housing 102 increases, and desired draft angle has caused fin thickness 180 to increase, and this will certainly hinder air and flow between fin 122, and reduces total effective surface area.The effective surface area of housing 102 increases requirement and adopts the close fin 122 in many intervals.Like this, the employing of quadrant heat radiating fin structure 176 has formed bigger effective surface area.

Fig. 6 and 7 is respectively the top view and the drawing in side sectional elevation of first end shield 110, expression fin 122, heat radiation thorn 160 and some air-deflectors 184.Flowing through the air stream 140 of totally sealing fan cooled electric notor 100 can be categorized as cursorily and flow through appearance 120 and flow through outer flow between the fin 122.This outer flow represents that just along the velocity gradient of the axial length of motor 100, the air velocity that promptly flows through housing 102 reduces vertically when 140 fens forks of air stream.In addition, end shield 112 has extremely low cooling effect usually owing to lack air movement.In one embodiment, fin 122 is fin 176 that quadrant is arranged, and promptly fin 122 stretches out along each direction in top 186, the end 188, left side 190 or right side 192 four directions.The fin 176 that quadrant is arranged comprises some for example quadrantal turnings 194 of the adjacent quadrant intersection of quadrant 186 and quadrant 190 that are configured in.An advantage of quadrant heat radiating fin structure 176 is that air stream 140 is discharged from fan 138 in quadrantal turning 194.It is little that the air stream of emitting at 194 places, turning of four circles is generally the cooling benefit, because the interval broad between the fin of configuration like this.Air stream 140 can improve by incorporating air guide device 184 into end shield 110.Air guide device 184 by quadrantal turning 194 partial occlusion air stream 140, to reduce the quantity of the air stream 140 of discharging from fan guard (in Fig. 6 and 7, not showing) at 194 places, quadrantal turning.Also similar air-deflector can be merged in the fan guard.In one embodiment, have at least an air-deflector 184 to be on the end shield 110.Air-deflector 184 guides to cover 104 along fin 122 with air stream 140 from fan 138.In one embodiment, air-deflector 184 is configured in the first half of end shield 110, and forms one with end shield 110 in manufacture process.Air-deflector 184 has changed air stream and direction, and helps to keep air stream 140 to contact along the outer surface of fin 122 with housing 102.

The air stream 140 of discharging from quadrantal turning 194 also can be utilized to improve the cooling of end shield 112.Because the 194 air streams 140 of discharging relatively are not subjected to the loose constraint of sheet 122 of the adjacent heat of cooling from quadrantal turning, compare along air stream between the velocity gradient of the length of housing 102 and the passage that forms by fin 122 and to have lower value.This air that is present in the fair speed at quadrantal angle 194 can be directed to by means of an aeroscopic plate (not showing in Fig. 6 to 7), makes it flow through the outer surface of end shield 112.By aeroscopic plate being disposed on the end shield 112, portion of air stream 140 can be directed to, and flows through the outer surface 120 of end shield 112, thereby strengthens the convective heat transfer from outer surface 120.Convective heat transfer from end 112 enhancing just strengthens from total or all heat transfers of motor 100.

The air stream 140 that flows through outer surface 120 is outer flow, because it is not delimited along a direction, promptly air stream 140 can be told from outer surface 120.The air stream 140 that flows through bottom quadrant 188 suffers restraints and forms inside and flows.Bottom quadrant 188 has seldom and highly lower cold sink 122 usually, disturbs with mounting panel (not shown) that motor 100 is housed or base plate avoiding.Cold sink 122 quantity or highly reduce and cause all surfaces long-pending less, thus lower convective heat transfer appears on bottom quadrant 188.On bottom quadrant 188, comprise fin 122 with constraint air stream 140 and form the convective heat transfer on the quadrant 188 bottom flow section can improve in.The air stream 140 that flows through bottom quadrant 188 is subjected to the constraint of cold sink 196 and the base plate or the mount pad of outermost on either side.One fan guard (not showing in Fig. 6 and 7) creates conditions for carrying air to flow into bottom quadrant 188.Because 188 air stream 122 in the quadrant bottom constrained flow is crossed, the velocity gradient value has reduced, and has produced higher average air speed and final higher ensemble stream heat transfer on outer surface 120.

Fig. 8 and 9 is respectively the sketch of heat radiation thorn 169 and some known ribs 198, and diagram internal air stream 158 is cut important flow.In one embodiment, heat radiation thorn 160 radially extends from end shield 110, and stretches into air and flow in 158.Heat radiation thorn 160 has increased the surface area of inner surface 118, and allow air stream 158 radially flow through inner surface 118 with tangential speed component.Rib 198 is commonly known in the art in order to the area of the inner surface 118 of increase housing 102.Yet rib 198 has hindered tangential air stream 158, and the internal surface area that is exposed to air stream 158 is finally reduced.Heat radiation thorn 160 has more exposed surface area along the direction ratio rib 198 of air stream 158, thereby provides better heat radiation than rib 198.

Figure 10 is the sketch of known electric notor 200, and it comprises a housing 202, one stator cores 204, one coil end turns 206, one end shields, 208, one metallic channels 210 and pipeline terminal boxes 212.The known fan cooled electric notor 200 of totally sealing generally is designed to have and is positioned at the roughly pipeline terminal box 212 of the single metallic channel 210 of axial centre of housing 202.Metallic channel 210 requires to form from end turn 206 arranges the space of winding conducting wire to pipeline terminal box 212.Pipeline terminal box 212 is by rotating 180 ° of either sides that are installed in motor 200 with housing 202.The shortcoming of single metallic channel 210 and center pipe laying terminal box 212 is that metallic channel 210 has reduced the contact area between housing 202 and the stator core 204, thereby has weakened the heat radiation of housing 202.Another shortcoming of center pipe laying terminal box 212 is to flow through air stream 214 at the housing 202 of the pipeline terminal box side of motor 200 by 212 blocking-up of pipeline terminal box, has significantly weakened the convection current cooling in pipeline terminal box 212 downstreams.

Figure 11 and 12 is respectively the end view and the end-view of motor 250, and this motor comprises 258, two pipeline terminal boxes of 252, one fan guards of a housing base 260 and an end shield 262 with one first end 254 and one second end 256.Pipeline terminal box base 260 is positioned at second end 256 of housing 202.One air stream 264 is discharged from fan guard 258, along the advance length of housing 252 of a plurality of fin 266.In order to reduce the disturbance to air stream 264 that is caused by the pipeline terminal box 268 on the motor 250, pipeline terminal box 268 can be installed in second end 256 of housing 252.Motor 250 comprises two pipeline terminal box bases 260 that are in second end 256, is installed in the either side of motor to allow pipeline terminal box 268.In addition, the end of pipe laying terminal box base 260 is general axially aligns with the relatively poor stator end turns (not shown) of conducting heat.At first end 254 and second end 256 of housing 252, heat transfer is the convection current to housing 252 inside from this end turn, through the heat conduction of housing 252 and convection current comprehensive that enter air stream 264 with degree.Heat transfer through housing 252 centers is the convection current that enters the heat conduction of housing 252 and enter air stream 264 then through stator core.

The temperature of pipeline terminal box 268 is low to be caused owing to being configured in the 2nd end in the pipeline terminal box.Air stream 264 is when diverging along the mobile time-division of the length of housing 252.When pipeline terminal box base position when approaching fan guard 258, air stream 264 is near housing 252.The air velocity that flows through housing 252 outer surfaces is depended in the convection current cooling of pipeline terminal box 268.Because pipeline terminal box 268 is configured in second end 256, the maximum surface area of pipeline terminal box 268 just is exposed to air stream 264.Pipeline terminal box 268 can be connected in end shield 262 and housing 252.Perhaps, the pipeline terminal box can only be connected in housing 252.

Figure 13 is that this branch office is well-known in this technology along the sketch of the stator core 280 of longitudinal center line 282 alignings of motor shell 284 or centering.Motor shell 284 comprises a guard shield 286, one first end shields 258 and one second end shield 290.Many known fan cooled electric notors of totally sealing generally comprise the stator core 280 and a rotor core (not shown) of center line 282 centerings vertically.The metallic channel (not shown) of the core of these centerings and a centering and a pipeline terminal box mount pad (not shown) combine allow by means of roll-shell 284 about 180 ° can simplify the location and installation of a pipeline terminal box (not shown) on housing 284 either sides.The shortcoming of centering location core is that the relative distance between core and guard shield 286 ends or the end shield 288,290 changes along the length of these cores.

Figure 14 is the sketch with the stator core 300 of longitudinal center line 302 skew of motor shell 304.Housing 304 comprises a guard shield 306, one first end shields 308 and one second end shield 310.Make stator core and rotor core (not shown) can improve total heat transfer to the fan end skew of housing 304.For example, stator core 300 and rotor core are installed closelyer from end shield 310 from end shield 308 ratios.312 contiguous end shield 308 configurations of one fan.The air velocity degree that flows through housing 304 outer surfaces has a gradient, and wherein the speed near fan 312 is the highest, and minimum from fan 312 point place farthest.This outside convective heat transfer is the function of air velocity, and is the strongest in high air speed district convection current.Like this, stator core 300 and rotor core are located to such an extent that approach end shield 308 most and just produced higher outside convection current.In addition, because stator core 300 and rotor core are located towards end shield 308, the correlation of internal cooling circuit can be improved, and heat can more promptly transmit the colder surface of end shield 308 from the end of rotor and stator core 300.Compare in short-term with guard shield 306 when stator core 300 and rotor core, make these cores skews that more cooling benefit is provided.

Figure 15 is the curve of external speed and convection current axial-temperature gradient.Totally seal in the fan cooled motor any and since near the temperature of the end of fan than lower from the temperature of fan end farthest, always have an axial moist gradient.Because stator core and rotor core are offset to fan end, this axial-temperature gradient reduces the whole temperature of internal part.This axial-temperature gradient also makes the mean temperature of internal part that some decline is arranged.

Figure 15 represents along first air velocity and first convection coefficient of the motor shell appearance of no center pipe laying terminal box.When motor shell comprises a center pipe laying terminal box, produce second air velocity and second convection coefficient.Second air velocity has and the roughly the same initial velocity of first air velocity, but reduces rapidly about the longitudinal center line place of motor shell greatly.Therewith roughly the same, second convection coefficient has the initial convection coefficient roughly the same with first convection coefficient, but roughly descends rapidly at the longitudinal center line place of motor shell.This air velocity and convection coefficient are all higher in the fan end of motor shell, but descend to the axial length of this opposite fan end along motor shell.

Figure 15 also represents to have the temperature of the motor of a skew core and an axial alignment core.The temperature of this skew core motor is lower than the temperature of axial alignment core motor.Equally, if motor shell comprises a center pipe laying terminal box, the temperature of then not having the motor of skew core promptly has the temperature of axial alignment core motor, roughly increases sharply at the axial centre place of motor shell.In addition, having a temperature that is offset the motor of core descends than the motor with axial alignment core quickly to the opposite fan end of motor.

Bearing load in motor is rotor weight, electromagnetic force and the summation that applies load.In the motor of stator and rotor core centering, rotor weight and electromagnetic force are evenly distributed between the two bearings.Adopting the stator core of skew and the advantage of rotor core is the weight of rotor appropriate section and the end that electromagnetic force can be moved toward motor.In a typical application, the power on motor fan end bearing farthest is to apply power to add rotor weight and electromagnetic force.Make the skew of stator core and rotor core, can alleviate weight and electromagnetic force, cause bearing life longer by the rotor portion of opposite fan spindle bearing supporting.Because to apply power generally much bigger than rotor weight and electromagnetic force, this opposite fan end bearing receive the order usually life-span much shorter than this fan end bearing.When stator core and rotor core skew, this opposite fan end bearing just supports one and has alleviated total load, and the life-span increases as a result.The total load that this fan end bearing supporting one increases a little, but still can have than the opposite longer life-span of fan end bearing.

In addition, because stator core and rotor core skew, the armature spindle amount of deflection that is caused by rotor weight and electromagnetic force reduces.Because pass through the arc deflection of the axle of two bearings, this amount of deflection reduces.Equally, the part electromagnetic force is the function of this shaft deflection size.Because shaft deflection reduces, the electromagnetic force that is produced by shaft deflection also reduces, and causes the radial load of axle and bearing to reduce.The reducing of electromagnetic force can make bearing life prolong.Another benefit that amount of deflection reduces is that the side direction natural frequency of axle improves.The raising of this natural frequency is compared with the machine of rotor core axial alignment with being designed to stator core, allows to omit with high rotational speed running or employing the axle of minor diameter.

Another benefit of stator and rotor core skew is to have simplified assembling.In the time of in stator core is installed in housing, relative distance can remain unchanged between the fan end of the fan end of stator or rotor core and housing or armature spindle, and this just allows the location of equipment and anchor clamps to simplify.The motor of stator core and rotor core centering in housing requires a kind of stator core and rotor core of unique length sometimes, and they have the position of a uniqueness in framework or axle, and this just requires anchor clamps and instrument to adapt to the variation at the position that may require.

This totally seals the fan cooled electric notor owing to the air mass flow that has improved along the motor outer surface has strengthened heat radiation.Equally, the internal surface area of this motor shell increases, thereby has strengthened the convective heat transfer of internal part.In addition, comprised a plurality of pipeline junction box seats, allowing to save the inner lead groove, thereby improved heat transfer because of having reduced the outer air flow disturbance of framework in the opposite fan end of this motor.

According to the above explanation to various embodiments of the present invention, obvious purpose of the present invention reaches.Though described and illustrated the present invention in detail, yet will be clear that understanding, these explanations and diagram be only with laying down a definition and example, but not as limiting.Therefore, the spirit and scope of the present invention only are subjected to the restriction of appended claims clause.

Claims (20)

1. fan cooled electric notor comprises:

A motor shell, comprise the guard shield that has first and second ends, first end shield that is loaded on the described first guard shield end, second end shield that is loaded on the described second guard shield end, described first and second end shields comprise the bearing spider that bearing is housed in it, and described housing also comprises an inner surface and an outer surface, and described outer surface comprises some fin, described inner surface comprises some heat radiation thorns, and described fin and heat radiation thorn are in order to strengthen the heat radiation of described motor.

A stator that is loaded in the housing comprises that one has and allows the stator core in the hole that stator core passes;

A rotor, comprise that one has and allows the rotor core in the hole that rotor core passes, a roughly straight axle that passes described rotor core hole, described rotor is loaded in the described housing with rotary way, and passing described stator hole, described axle is supported with rotary way by described bearing.

2. press the described electric notor of claim 1 for one kind, it is characterized in that also comprising first fan outside described first end shield, described first fan can produce one air that flows through described outer fin stream.

3. press the described electric notor of claim 1 for one kind, it is characterized in that also comprising an inner air baffler that is connected in described guard shield, described inner baffler is used to guide the air stream in the described housing.

4. press the described electric notor of claim 1 for one kind, it is characterized in that described outer fin is discharged to into the quadrant pattern.

5. press the described electric notor of claim 1 for one kind, it is characterized in that described first end shield comprises that also some quadrantal turnings and at least one are configured in the air-deflector on each quadrantal turning.

6. one kind by the described electric notor of claim 1, it is characterized in that also comprising some wind deflectors, crosses at least a portion air of the described second end shield face with directed flow, and described wind deflector is connected in described housing.

7. press the described electric notor of claim 1 for one kind, it is characterized in that also comprising at least two pipeline junction box seats that are placed in described guard shield second end, described pipeline junction box seat is configured to a pipeline terminal box is installed thereon.

8. press the described electric notor of claim 1 for one kind, it is characterized in that described stator core and described rotor core all are placed than close more close described first end shield of described second end shield.

9. press the described electric notor of claim 3 for one kind, it is characterized in that also comprising second fan in described first end shield, described second fan can produce one air stream that flows through described inner baffler and described internal heat dissipating thorn.

10. press the described electric notor of claim 2 for one kind, it is characterized in that described first fan does not comprise a support plate.

11. a fan cooled electric notor comprises:

A motor shell comprises the guard shield that has first and second ends, first end shield that is loaded on the described first guard shield end, and second end shield that is loaded on the described second guard shield end, described first and second end shields comprise the bearing spider that bearing is housed in it;

A stator that is loaded in the housing comprises that one has and allows the stator core in the hole that stator core passes;

A rotor, comprise that one has and allows the rotor core in the hole that rotor core passes, a roughly straight axle that passes described rotor core hole, described rotor is loaded in the described housing with rotary way, and pass described stator hole, described axle is supported with rotary way by described bearing, and described stator core and rotor core are placed than close more close described first end shield of described second end shield;

One in described first end shield and be placed in first fan on the described rotor core;

At least one inner baffler is used for from described first fan inside guiding air stream.

12. one kind by the described electric notor of claim 11, it is characterized in that also comprising an inner surface and an outer surface, described outer surface comprises some fin, and described inner surface comprises some heat radiation thorns, and described fin and heat radiation thorn are in order to strengthen the heat radiation of described motor.

13. press the described electric notor of claim 12 for one kind, it is characterized in that also comprising second fan outside described first end shield, described second fan is used for the air stream that directed flow is crossed described outside heat sink.

14. one kind by the described electric notor of claim 12, it is characterized in that described external fan is listed as the quadrant pattern that becomes to comprise quadrantal turning by heat, described first end shield also comprises some air-deflectors that are configured on the described quadrantal turning, and described second end shield comprises that also at least one is configured to the air ducting that the energy directed flow is crossed the air of the described second end shield face.

15. press the described electric notor of claim 13 for one kind, it is characterized in that described rotor core comprises an end ring, described first fan is made of described rotor core end ring.

16. press the described electric notor of claim 11 for one kind, it is characterized in that also comprising some pipeline junction box seats that are configured in, are configured at least in part on described second end shield, described pipeline junction box seat is configured to can install a pipeline terminal box thereon.

17. method of assembling the fan cooled electric notor, this motor comprises a motor shell, this housing comprises the guard shield that has first and second ends, first end shield that is loaded on the described first guard shield end, first end shield that is loaded on the described second guard shield end, an inner surface, an outer surface, this outer surface comprises some fin, and this inner surface comprises some heat radiation thorns, and these fin and heat radiation thorn are in order to strengthen the heat radiation of motor, a stator that is contained in the housing, it comprises having a stator core that allows the hole that stator core passes, and a rotor comprises having a rotor core that allows the hole that rotor core passes, an axle that passes this rotor core hole, this rotor is installed in the housing with rotary way, and passes this stator hole, and described method comprises the steps:

Stator is drawn together in the housing;

Rotor is drawn together in the stator;

First and second end shields are linked to each other with housing;

Some wind deflectors are fixed in housing.

18. by the described method of claim 17, it is characterized in that this fin is arranged in the quadrant pattern, it comprises some quadrantal turnings, described method also comprises the steps:

Wind deflector is connected to guard shield second end;

In first end shield, form some air-deflectors in quadrantal corner;

First fan is installed on the armature spindle in the first end shield outside, and in order to producing air stream, this air stream is subjected to air-deflector and wind deflector directed flow to cross fin and flows through at least a portion surface of second end shield.

19. by the described method of claim 17, it is characterized in that this housing comprises that at least one inner baffler and at least one are in second fan in first end shield, described method also comprises the steps:

Constitute second fan by rotor core;

Inner baffler is installed, air conductance at least a portion of stator is flow through at least a portion of first end shield then, then turn back to second fan from second fan.

20. by the described method of claim 17, it is characterized in that stator is inserted shell and the step that rotor inserts stator is comprised the steps: stator is inserted into the position of guard shield first end nearer than close guard shield second end, rotor is inserted into the position of guard shield first end nearer than close guard shield second end.

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