CN104578596A - Motor and method for machining stator structure of motor - Google Patents
Motor and method for machining stator structure of motor Download PDFInfo
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- CN104578596A CN104578596A CN201510033022.2A CN201510033022A CN104578596A CN 104578596 A CN104578596 A CN 104578596A CN 201510033022 A CN201510033022 A CN 201510033022A CN 104578596 A CN104578596 A CN 104578596A
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- stator
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- ventilation
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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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
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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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a motor. An insulating sleeve (11) is packaged on the inner surface of a stator core of the motor, side walls (12) are packaged on the two lateral sides of the stator core of the motor, a sealed cavity (13) is formed by the insulating sleeve (11), the two side walls (12) and a shell of the motor, evaporative cooling media (17) submerging the stator core are packaged at the lower portion of the sealed cavity (13), and condensation pipes (14) axially penetrating through the sealed cavity (13) are arranged at the upper portion of the sealed cavity (13). Air gaps (3) between the stator core and a rotor of the motor are wedge-shaped air gaps (3), and a rotor core (2) is provided with at least one axially-through ventilation duct (21). The stator core is further provided with at least one ventilation pipe (15) axially penetrating through the sealed cavity (13). By means of the motor of the structure, the cooling effect on the rotor can be improved. In addition, the invention discloses a method for machining a stator structure of the motor, and the same technical effects are achieved.
Description
Technical field
The present invention relates to technical field of motors, particularly relate to the processing method of a kind of motor and stator structure thereof.
Background technology
Threephase asynchronous, switched reluctance machines etc. belong to driving arrangement very important in the wide spectrums such as smelting, mine, machinery, weaving, aviation, household electrical appliance, automobile, belong to horizontal type structure (namely the rotating shaft of stator and rotor iron core is horizontal positioned), great majority are in continuously-running duty.
The heat generating components of motor mainly concentrates on stators and rotators, with the motor cooling technology of present stage, evaporation cooling technique can solve the most serious stator cooling problem of heating, and the heat generating components of remaining part mainly concentrates on the rotor core and winding (switched reluctance machines is without rotor windings) that rotate.If rotor cooling solves bad, the normal operation of motor still can be badly influenced.
About the problem of rotor cooling, application number be 201010536084.2 patent discloses a kind of engine air cooling structure preferably, as shown in Figure 1 (in order to clear expression airflow direction, the width of air gap is exaggerated several times by this figure), the stator core 1 ' of this motor, air gap 3 ' between rotor 2 ' interior placement insulating sleeve 11 ', stator core 1 ' inwall is close to by this sleeve, certain distance is left with rotor 2 ' surface, ensure that rotor 2 ' normal reliable ground rotates, a sidewall 12 ' is respectively increased again at stator core 1 ' two ends, one is assembled into the insulating sleeve 11 ' of stator core 1 ' inner surface, and then formed stator core 1 ' integral sealing chamber 13 '.Several condenser pipes 14 ' are circumferentially evenly arranged on the top of the annular seal space 13 ' of stator core 1 ', condenser pipe 14 ' passes across the sidewall 12 ' at annular seal space 13 ' body two ends, firmly weld together in contact position, then condenser pipe 14 ' is divided into two parts, a part is positioned at the annular seal space 13 ' body of stator core 1 ', a part is positioned at that sealing chamber 13 ' is external, motor case 4 ', and two side outlets of condenser pipe 14 ' communicate with the external world.
Before motor runs, by under normal temperature for liquid evaporative cooling medium 15 ' to enter the annular seal space 13 ' of stator core 1 ' from the valve tank being positioned at support bottom, topping up face there was not stator core 1 ' outer wall, as shown in Figure 1, stator core 1 ' entirety is ensured to soak completely, topping up face also needs to leave enough space lengths between condenser pipe 14 ', the evaporating space namely in thermal conduction study.In motor operation course, stator core 1 ' is overall produces a large amount of heat because of various loss, heated the evaporative cooling medium 15 ' in cavity, medium constantly absorbs heat, temperature constantly raises, come to life when reaching boiling temperature heat exchange, the ability now absorbing heat is the strongest, medium in gaseous state after boiling constantly rises because density diminishes, run into the condenser pipe 14 ' on top, after the extraneous cold wind (or water) interior with condenser pipe 14 ' carries out exchange heat, medium is condensed into liquid state again, liquid surface is dripped back from condenser pipe 14 ' outer wall, like this can continuously by evaporative cooling medium 15 ' and the outside air (or water) in condenser pipe 14 ', the heat sent by stator core 1 ' falls apart to the outside of motor in time, form self-loopa evaporative cooling process.
After said stator iron core 1 ' seal sleeve 11 ' and stator core 1 ' internal diameter are close to, and what formed between rotor 2 ' is the wedged air gap 3 ' that tapering is no more than 5 °, as illustrated by the arrows in fig. 1, this wedged air gap 3 ' causes the air-flow beyond electric motor internal stator iron core 1 ' annular seal space 13 ' body to flow to large mouth by the osculum of wedged air gap 3 ', flow back into the ventilation ducts 21 ' on rotor 2 ' again through top condenser pipe 14 ', after condenser pipe 14 ', after flowing out ventilation ducts 21 ', come back to the osculum end of wedged air gap 3 ' again.
Even if like this, above-mentioned air cooling structure or undesirable, reason is following two aspects:
The first, very short a section only by top condenser pipe 14 ' both sides of the hot blast flowed out from the big opening end of wedged air gap 3 ', and the efficiency of carrying out heat exchange between condenser pipe 14 ' is not high;
The second, because stator core 1 ' adopts integral sealing, all blocked on stator core 1 ' crosswind road, then this cooled wind can only flow back to the osculum end of wedged air gap 3 ' from the ventilation ducts 21 ' be positioned at rotor 2 ', could circulate.And rotor 2 ' is High Rotation Speed, causes ventilation ducts 21 ' High Rotation Speed, have influence on the formation of exhausting pressure head, cooled wind all can not be extracted in ventilation ducts 21 ' in time, and then have influence on the size of wind speed and the circulating effect of wind.
In view of this, urgently for above-mentioned technical problem, further optimal design is done to motor of the prior art, improve the cooling effect to rotor further.
Summary of the invention
Object of the present invention is for providing a kind of motor, and this motor improves the cooling effect of rotor by the axial ventilation pipe that its stator is offered.Another object of the present invention is for providing a kind of processing method of stator structure of motor.
For solving the problems of the technologies described above, the invention provides a kind of motor, the inner surface of the stator core of described motor is packaged with insulating sleeve, its two sides are packaged with sidewall, the housing of described insulating sleeve, two described sidewalls and described motor forms annular seal space, and described annular seal space bottom is packaged with evaporative cooling medium, the top of flooding described stator core and is provided with the condenser pipe axially running through described annular seal space; Air gap between the stator core of described motor and rotor is wedged air gap, and described rotor core is provided with at least one ventilation ducts axially run through; Described stator core is also provided with at least one ventilation duct axially running through described annular seal space.
Adopt said structure, after seal stator, the insulating sleeve of its sealing is close on stator inner surface, forms with rotor outer surface the wedged air gap that tapering is no more than 5 °, according to fluid motion theory and coriolis force theory, in this wedged air gap, produce the blast being flowed to big opening end by osculum end.At electric motor starting and run duration, rotor produces heat, wind in casing flows to by the osculum end of this wedged air gap the heat absorbing rotor in the process of big opening end, meanwhile, wind in casing can also flow to its big opening end from the osculum end of rotor ventilation ditch, and becomes the higher hot blast of temperature at large mouth air outlet place.From the hot blast that wedged air gap flows out, be divided into two parts:
For the first half of rotating shaft, rise after the ventilation duct running into stator side because hot blast density is little, by the draught head of these ventilation duct both sides, the ventilation duct of press-in stator side, and the position that need not rise to condenser pipe again cools, after hot blast enters the ventilation duct of stator side, because this ventilation duct is on stator core, just in time soaked by the liquid evaporative cooling medium in seal stator cavity, then the hot blast in this ventilation duct and the liquid evaporative cooling medium outside pipe carry out sufficient heat exchange, the wind that ventilation duct flows out flows back to the osculum end place of wedged air gap and rotor ventilation ditch more again.
For the latter half of rotating shaft, although the density of hot blast is little and the hot blast of some moves upward, but the pressure reduction formed due to stator side ventilation duct both sides is larger, add hot blast from the effect being subject to larger centrifugal force after wedged air gap and rotor ventilation ditch are thrown out of, still have the hot blast of most to be pumped in the stator side ventilation duct that is positioned at below rotor, moving upward also from the major part of the wind after this ventilation duct flows out, some flows back to the osculum end being positioned at wedged air gap below armature spindle and rotor ventilation ditch.
A large amount of experimental test result displays, hot air temperature after being heated by rotor is often between 70 ° ~ 90 DEG C, the temperature of the liquid evaporative cooling medium in seal stator cavity generally maintains about 50 DEG C, its heat is passed to liquid evaporative cooling medium by such hot blast, the temperature of the wind after the ventilation duct of outflow stator side is generally between 50 ° ~ 60 DEG C, the major part of these wind rises to condenser pipe place, top, heat exchange is carried out again with condenser pipe, cooled wind flow back into the osculum end of wedged air gap along casing, the osculum end of ventilation ducts, arrive the temperature of the wind of this position generally between 30 ° ~ 35 DEG C, and then enter and flow next time, so constantly circulation is got up, wind in casing is circulated all the time, realize rotor-side cooling.
Although also have the wind of part not reach the condenser pipe of topmost for the moment, but because rotor is continuous High Rotation Speed, the position of epitrochanterian ventilation ducts and wedged air gap is also change at a high speed, so, in casing, the heat of hot blast is in the state taken away by evaporative cooling medium and condenser pipe incessantly, its wind speed is at least larger 3 times than structure of the prior art with wind flow, and cooling effect is fairly obvious.
Preferably, described ventilation duct is positioned in the yoke portion of described stator core.
Preferably, described stator core for laminating iron core, described in laminate iron core and be provided with axial ventilation passage, described ventilation duct suit is fixed in described vent passages.
Preferably, the wall thickness of described ventilation duct is less than or equal to 2mm.
Preferably, described ventilation duct is copper pipe or earthenware.
Preferably, the number of described ventilation duct is multiple, and multiple described ventilation duct is along the same even circumferential distribution of described stator core end face; The number of described ventilation ducts is also multiple, and multiple described ventilation ducts is along the same even circumferential distribution of described rotor core end face.
The present invention also provides a kind of processing method of stator structure of motor, comprises the steps:
Stator lamination is processed at least one ventilation hole; Multiple described stator lamination correspondence is laminated formation stator core, and multiple described ventilation hole is spliced to form vent passages;
Preset the ventilation duct corresponding with described vent passages, described ventilation duct plug-in mounting to be entered in described vent passages and to be fixedly connected with it;
To form stator module, more described stator module is formed annular seal space in casing, with the condenser pipe preset, casing at described stator core inner surface, sidewall difference branch sleeve, sidewall.
Preferably, described ventilation duct and described vent passages are welded in one.
Preferably, the wall thickness of described ventilation duct is less than or equal to 2mm.
Preferably, described ventilation duct is copper pipe or earthenware.
Because above-mentioned motor has as above technique effect, therefore, the processing method of the stator structure corresponding to this motor also should have corresponding technique effect, does not repeat them here.
Accompanying drawing explanation
The structural representation of Fig. 1 rotor air cooling structure disclosed in patent CN201010536084 and wind direction flow distribution figure;
Fig. 2 is structural representation and the wind direction flow distribution figure of a kind of embodiment of motor provided by the present invention;
Fig. 3 is the structural representation of the stator lamination of motor in Fig. 2;
Fig. 4 be in Fig. 3 stator lamination laminate after stator core and the installation diagram of ventilation duct;
Fig. 5, Fig. 6 are respectively front view, the end view of ventilation duct shown in Fig. 4;
Fig. 7 is the sidewall figure of encapsulated stator iron core in Fig. 2;
Fig. 8 is the FB(flow block) of a kind of embodiment of the processing method of the stator structure of motor provided by the present invention.
Wherein, the Reference numeral in Fig. 1 and the corresponding relation between component names are:
Stator core 1 '; Sleeve 11 '; Sidewall 12 '; Annular seal space 13 '; Condenser pipe 14 '; Evaporative cooling medium 15 ';
Rotor 2 '; Ventilation ducts 21 ';
Air gap 3 ';
Casing 4 ';
Reference numeral shown in Fig. 2 to Fig. 8 and the corresponding relation between component names are:
Sleeve 11; Sidewall 12; Condenser pipe installing hole 121; Ventilation duct installing hole 122; Sleeve installing hole 123; Annular seal space 13; Condenser pipe 14; Ventilation duct 15; Vent passages 16; Evaporative cooling medium 17;
Rotor core 2; Ventilation ducts 21; Stator yoke 22;
Air gap 3;
Casing 4.
Embodiment
Core of the present invention is for providing a kind of motor, and this motor improves the cooling effect of rotor by the axial ventilation pipe that its stator is offered.Another core of the present invention is for providing a kind of processing method of stator structure of motor.
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 2, Fig. 2 is structural representation and the wind direction flow distribution figure (in order to clear display wind direction flowing, air gap is exaggerated several times) of a kind of embodiment of motor provided by the present invention.
In a kind of embodiment, as shown in Figure 2, the invention provides a kind of motor, the stator core (being flooded by evaporative cooling medium in Fig. 2) of motor inner surface is packaged with insulating sleeve 11, its two sides are packaged with sidewall 12, the housing of insulating sleeve 11, two sidewalls 12 and motor forms annular seal space 13, and annular seal space 13 bottom is packaged with evaporative cooling medium 17, the top of flooding stator core and is provided with the condenser pipe 14 axially running through annular seal space 13.Air gap 3 between the stator core of motor and rotor is wedged air gap 3, and rotor core 2 is provided with at least one ventilation ducts 21 axially run through, and stator core is also provided with at least one ventilation duct 15 axially running through annular seal space 13.
Adopt said structure, after seal stator, the insulating sleeve 11 of its sealing is close on stator inner surface, the wedged air gap 3 that tapering is no more than 5 ° is formed with rotor outer surface, according to fluid motion theory and coriolis force theory, in this wedged air gap 3, produce the blast being flowed to big opening end by osculum end.At electric motor starting and run duration, rotor produces heat, wind in casing 4 flows to by the osculum end of this wedged air gap 3 heat absorbing rotor in the process of big opening end, meanwhile, wind in casing 4 can also flow to its big opening end from the osculum end of rotor ventilation ditch 21, and the higher hot blast of temperature is become at large mouth air outlet place, as shown in Figure 2.From the hot blast that wedged air gap 3 flows out, be divided into two parts to describe:
For the first half of rotating shaft, see Fig. 2, rise after the ventilation duct 15 running into stator side because hot blast density is little, by the draught head of these ventilation duct 15 both sides, the ventilation duct 15 of press-in stator side, and the position that need not rise to condenser pipe 14 again cools, after hot blast enters the ventilation duct 15 of stator side, because this ventilation duct 15 is on stator core, just in time soaked by the liquid evaporative cooling medium 17 in the body of seal stator chamber 13, hot blast then in this ventilation duct 15 and the liquid evaporative cooling medium 17 outside pipe carry out sufficient heat exchange, the wind that ventilation duct 15 flows out flows back to the osculum end place of wedged air gap 3 and rotor ventilation ditch 21 more again.
For the latter half of rotating shaft, see Fig. 2, although the density of hot blast is little and the hot blast of some moves upward, but the pressure reduction formed due to stator side ventilation duct 15 both sides is larger, add hot blast from the effect being subject to larger centrifugal force after wedged air gap 3 and rotor ventilation ditch 21 are thrown out of, still have the hot blast of most to be pumped to the stator side ventilation duct 15 li be positioned at below rotor, moving upward also from the major part of wind after this ventilation duct 15 flows out, some flows back to the osculum end being positioned at wedged air gap 3 below armature spindle and rotor ventilation ditch 21.
A large amount of experimental test result displays, hot air temperature after being heated by rotor is often between 70 ~ 90 DEG C, the temperature of the liquid evaporative cooling medium 17 in the body of seal stator chamber 13 generally maintains about 50 DEG C, its heat is passed to liquid evaporative cooling medium 17 by such hot blast, the temperature of the wind after outflow stator side ventilation duct 15 is generally between 50 ~ 60 DEG C, this wind major part rises to top condenser pipe 14 place, as shown in Figure 2, heat exchange is carried out again with condenser pipe 14, cooled wind flow back into the osculum end of wedged air gap 3 along casing 4, the osculum end of ventilation ducts 21, arrive the temperature of the wind of this position generally between 30 ~ 35 DEG C, and then enter and flow next time, so constantly circulation is got up, wind in casing 4 is circulated all the time, realize rotor-side cooling.
Although also have the wind of part not reach the condenser pipe 14 of topmost for the moment, see Fig. 2, but because rotor is continuous High Rotation Speed, epitrochanterian ventilation ducts 21 and the position of wedged air gap 3 are also change at a high speed, so, in casing 4, the heat of hot blast is in the state taken away by evaporative cooling medium 17 and condenser pipe 14 incessantly, and its wind speed is at least larger 3 times than structure of the prior art with wind flow, and cooling effect is fairly obvious.
In said structure, in order to strengthen the effect of gas flow further, ventilation ducts 21 can be set to wedge shape ventilation ducts, ventilation duct 15 is set to wedge shape ventilation duct, and the large mouth of the large mouth of wedge shape ventilation ducts, osculum direction and wedged air gap 3, osculum direction are identical, large mouth, the osculum direction of the large mouth of wedge shape ventilation duct, osculum direction and wedged air gap are contrary.Can expect, above-mentioned ventilation ducts 21 not only for wedge shape, ventilation duct 15 also not only for wedge shape, for the simplification of processing technology and the consideration of production cost, also ventilation ducts 21, ventilation duct 15 all can be set to cylindrical structural.
The set-up mode of above-mentioned ventilation duct 15 and rotor ventilation ditch 21 can have varied.
In concrete scheme, as shown in Figure 3, Fig. 3 is the structural representation of the stator lamination of motor in Fig. 2; Above-mentioned ventilation duct 15 can be located in the stator yoke 22 of stator core.
Air duct is located at stator yoke 22, need perforate in stator yoke, and stator is the chief component of motor internal magnetic circuit, only have the magnetic flux distribution of stator yoke 22 more even, than other positions, as stator teeth is little, so perforate slightly affects for original magnetic flux distribution in stator yoke 22, impact is little.And if ventilation duct 15 is established on the stator teeth, then can be very large to magnetic flux effect, cause field distortion, serious supersaturation.The Another reason be located at by ventilation duct in stator yoke is, the evaporative cooling medium 17 in annular seal space 13 body did not just have whole stator, can ensure that air channel is in liquid evaporative cooling medium 17 li completely like this, carry out sufficient heat exchange with this medium.If the position of ventilation duct 15 more up, then higher than the liquid level of liquid medium, it is the medium of gaseous state, also heat exchange can be carried out with air channel, just with lead to casing 4 external world, mix with the condensation ventilation duct 15 of gaseous medium heat exchange, unfavorable for gaseous medium condensation, its cooling effect is not good.If the position of ventilation duct 15 more down, then can conflict with the position of stator slot.
Certainly, above-mentioned ventilation duct 15, not only in the stator yoke 22 being located at stator core, can also be located at other positions that magnetic flux density is slightly large.
In concrete scheme, as shown in Figure 4, Fig. 4 be in Fig. 3 stator lamination laminate after stator core and the installation diagram of ventilation duct; Said stator iron core for laminating iron core, can laminate iron core and being provided with axial ventilation passage 16, and ventilation duct 15 suit is fixed in vent passages 16.
Adopt this structure, ventilation duct 15 can be set, the leakage of coolant 17 and this integral type ventilation duct 15 can avoid evaporating well laminating in iron core simply, easily.Can expect, vent passages 16, not only for this structure, directly can also be used as ventilation duct 15 and use by above-mentioned ventilation duct 15.
More specifically in scheme, as shown in Figure 5, Figure 6, Fig. 5, Fig. 6 are respectively front view, the end view of ventilation duct shown in Fig. 4, and the wall thickness of above-mentioned ventilation duct 15 is less than or equal to 2mm.
This less wall thickness makes gas and the evaporative cooling medium 17 fully heat-shift of being convenient to flowing in ventilation duct 15.Its wall thickness specifically can be set to 1mm, also can be other numerical value.
In addition, above-mentioned ventilation duct 15 can be copper pipe or earthenware.
Because copper, pottery are the higher material of conductive coefficient, therefore, using copper or pottery as the material of ventilation duct 15, the heat-exchange capacity of ventilation duct 15 can be strengthened further.
More specifically, as shown in Figure 7, Fig. 7 is the sidewall figure of encapsulated stator iron core in Fig. 2; The top of this sidewall 12 is provided with multiple condenser pipe installing hole 121, middle part is provided with sleeve installing hole 123, multiple ventilation duct installing hole 122 is provided with in the position corresponding with stator yoke 22, also namely the number of ventilation duct 15 is multiple, and multiple ventilation duct 15 is along the same even circumferential distribution of stator core end face.
Adopt this structure, the multiple ventilation ducts 15 be uniformly distributed along the circumference can ensure that the hot blast of outflow from air gap 3, ventilation ducts 21 is even, pass through large discharge, thus ensure the stability of air cooling.Certainly, ventilation duct 15 is not also only for this setup, and setting of also can radially mutually staggering, its number can be specially 16, also can adopt other numbers.
The like, the number of above-mentioned ventilation ducts 21 is multiple, and multiple ventilation ducts 21 is along the same even circumferential distribution of rotor core 2 end face.
Like this, the heat produced when uniform multiple ventilation ductss 21 can take away rotor turns evenly, large discharge, its concrete number can obtain according to the number of the number of air gap 3 and flow, ventilation duct 15 and flow rate calculation.
In addition, please refer to Fig. 8, Fig. 8 is the FB(flow block) of a kind of embodiment of the processing method of the stator structure of motor provided by the present invention.
The present invention also provides a kind of processing method of stator structure of motor, comprises the steps:
S11: process at least one ventilation hole on stator lamination; Multiple stator lamination correspondence is laminated formation stator core, and multiple ventilation hole is spliced to form vent passages;
S12: preset the ventilation duct 15 corresponding with vent passages, to enter ventilation duct 15 plug-in mounting in vent passages and to be fixedly connected with it;
Above-mentioned two steps achieve the technique of processing ventilation duct 15 on stator core.Wherein, ventilation duct 15 can specifically and vent passages be welded in one, certainly, the two is fixedly connected with not only for this connected mode, also can adopt the connected modes such as interference fit.
In concrete scheme, the wall thickness of ventilation duct 15 can be set to and be less than or equal to 2mm by said method.This less wall thickness makes gas and the evaporative cooling medium 17 fully heat-shift of being convenient to flowing in ventilation duct 15.Its wall thickness specifically can be set to 1mm, also can be other numerical value.
In another concrete scheme, above-mentioned ventilation duct 15 can be specially copper pipe or earthenware.Because copper, pottery are the higher material of conductive coefficient, therefore, using copper or pottery as the material of ventilation duct 15, the heat-exchange capacity of ventilation duct 15 can be strengthened further.
S13: at stator core inner surface, sidewall 12 difference branch sleeve, sidewall 12 to form stator module, again stator module is installed in casing 4, make the housing of insulating sleeve 11, two sidewalls 12 and motor form annular seal space 13, and flood the evaporative cooling medium 17 of stator core in the encapsulation of annular seal space 13 bottom, top is provided with the condenser pipe 14 axially running through annular seal space 13.
This step achieves the process that stator core and casing 4, condenser pipe 14 form annular seal space 13.Because annular seal space 13 has been structure of the prior art, its course of processing does not repeat them here.
Said method achieves the hermetically-sealed construction of stator, and on stator core, arrange the ventilation duct 15 axially running through annular seal space 13, this stator and the rotor engagement with ventilation ducts 21 can be installed, and the air gap 3 between stator and rotor is set to wedged air gap 3.Like this, at electric motor starting and run duration, rotor produces heat, wind in casing 4 flows to by the osculum end of wedged air gap 3 heat absorbing rotor in the process of big opening end, meanwhile, wind in casing 4 can also flow to its big opening end from the osculum end of rotor ventilation ditch 21, and becomes the higher hot blast of temperature at large mouth air outlet place.From the hot blast that wedged air gap 3 flows out, be divided into two parts to describe:
For the first half of rotating shaft, see Fig. 2, rise after the ventilation duct 15 running into stator side because hot blast density is little, by the draught head of these ventilation duct 15 both sides, the ventilation duct 15 of press-in stator side, and the position that need not rise to condenser pipe 14 again cools, after hot blast enters the ventilation duct 15 of stator side, because this ventilation duct 15 is on stator core, just in time soaked by the liquid evaporative cooling medium 17 in the body of seal stator chamber 13, hot blast then in this ventilation duct 15 and the liquid evaporative cooling medium 17 outside pipe carry out sufficient heat exchange, the wind that ventilation duct 15 flows out flows back to the osculum end place of wedged air gap 3 and rotor ventilation ditch 21 more again.
For the latter half of rotating shaft, see Fig. 2, although the density of hot blast is little and the hot blast of some moves upward, but the pressure reduction formed due to stator side ventilation duct 15 both sides is larger, add hot blast from the effect being subject to larger centrifugal force after wedged air gap 3 and rotor ventilation ditch 21 are thrown out of, still have the hot blast of most to be pumped to the stator side ventilation duct 15 li be positioned at below rotor, moving upward also from the major part of wind after this ventilation duct 15 flows out, some flows back to the osculum end being positioned at wedged air gap 3 below armature spindle and rotor ventilation ditch 21.
Analyzed from the flow direction of above-mentioned hot blast, and show in conjunction with a large amount of experimental test results, the heat that rotor produces can transfer heat in coolant by ventilation duct 15 by the stator of said method processing, dispelled the heat further by condenser pipe 14 again, the hot air temperature of temperature between 70 ~ 90 DEG C is down to 30 ~ 35 DEG C the most at last, and come back to the osculum end of wedged air gap 3, the osculum end of ventilation ducts 21, so constantly circulation, realizes the good cooling effect of rotor-side.
This technique effect is identical with the technique effect of above-mentioned motor, is no longer described in detail here.
Above the processing method of a kind of motor provided by the present invention and stator structure thereof is described in detail.Apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection range of the claims in the present invention.
Claims (10)
1. a motor, the inner surface of the stator core of described motor is packaged with insulating sleeve (11), its two sides are packaged with sidewall (12), the housing of described insulating sleeve (11), two described sidewalls (12) and described motor forms annular seal space (13), and described annular seal space (13) bottom is packaged with evaporative cooling medium (17), the top of flooding described stator core and is provided with the condenser pipe (14) axially running through described annular seal space (13); Air gap (3) between the stator core of described motor and rotor is wedged air gap (3), and described rotor core (2) is provided with at least one ventilation ducts (21) axially run through; It is characterized in that, described stator core is also provided with at least one ventilation duct (15) axially running through described annular seal space (13).
2. motor according to claim 1, is characterized in that, described ventilation duct (15) is positioned in the stator yoke (22) of described stator core.
3. motor according to claim 2, it is characterized in that, described stator core for laminating iron core, described in laminate iron core and be provided with axial ventilation passage (16), described ventilation duct (15) suit is fixed in described vent passages (16).
4. motor according to claim 3, is characterized in that, the wall thickness of described ventilation duct (15) is less than or equal to 2mm.
5. motor according to claim 4, is characterized in that, described ventilation duct (15) is copper pipe or earthenware.
6. the motor according to any one of claim 1-5, is characterized in that, the number of described ventilation duct (15) is multiple, and multiple described ventilation duct (15) is along the same even circumferential distribution of described stator core end face; The number of described ventilation ducts (21) is also multiple, and multiple described ventilation ducts (21) is along the same even circumferential distribution of described rotor core (2) end face.
7. a processing method for the stator structure of motor, is characterized in that, comprises the steps:
Stator lamination is processed at least one ventilation hole; Multiple described stator lamination correspondence is laminated formation stator core, and multiple described ventilation hole is spliced to form vent passages;
Preset the ventilation duct corresponding with described vent passages, described ventilation duct plug-in mounting to be entered in described vent passages and to be fixedly connected with it;
To form stator module, more described stator module is formed annular seal space in casing, with the condenser pipe preset, casing at described stator core inner surface, sidewall difference branch sleeve, sidewall.
8. the processing method of the stator structure of motor according to claim 7, is characterized in that, described ventilation duct and described vent passages are welded in one.
9. the processing method of the stator structure of motor according to claim 8, is characterized in that, the wall thickness of described ventilation duct is less than or equal to 2mm.
10. the processing method of the stator structure of motor according to claim 9, is characterized in that, described ventilation duct is copper pipe or earthenware.
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| WO2018054224A1 (en) * | 2016-09-20 | 2018-03-29 | 北京交通大学 | Honeycomb-type closed ventilation and cooling device for motor |
| CN108471198A (en) * | 2018-04-26 | 2018-08-31 | 北京建筑大学 | A kind of switched reluctance machines and its control method, device and system |
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| CN204316260U (en) * | 2015-01-22 | 2015-05-06 | 北京建筑大学 | A kind of motor |
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| CN201887602U (en) * | 2010-11-08 | 2011-06-29 | 肖富凯 | Air cooling structure for a motor and horizontal type motor |
| WO2014170938A1 (en) * | 2013-04-15 | 2014-10-23 | 三菱電機株式会社 | Rotating electrical machine |
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| CN104578596B (en) | 2017-06-13 |
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