CN102810943A - Cooling structure of inner rotor motor - Google Patents
Cooling structure of inner rotor motor Download PDFInfo
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- CN102810943A CN102810943A CN2012102704679A CN201210270467A CN102810943A CN 102810943 A CN102810943 A CN 102810943A CN 2012102704679 A CN2012102704679 A CN 2012102704679A CN 201210270467 A CN201210270467 A CN 201210270467A CN 102810943 A CN102810943 A CN 102810943A
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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
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/225—Heat pipes
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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
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
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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
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/227—Heat sinks
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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
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a cooling structure of an inner rotor motor. The inner rotor motor comprises a rotor shaft, a rotor section, a stator section, a front end cover and a seal cover. The cooling structure comprises a third cavity arranged between the front end cover and the seal cover, and the third cavity is used as one part of a cooling medium channel. The rotor shaft is internally provided with a heat conduction cavity, an opening of the heat conduction cavity is arranged at one side of the front end cover, and the inner part of the heat conduction cavity is provided with heat conduction media. The first end of a heat conduction rod is arranged in the heat conduction cavity and is contacted with the heat conduction media, the second end of the heat conduction rod is arranged in the third cavity and is contacted with cooling media, and the second end and the front end cover are sealed by adopting a static seal way. The rotor shaft and the heat conduction rod are sealed by adopting a dynamic seal way. The heat of the rotor section and the rotor shaft is transmitted from the first end of the heat conduction rod in the heat conduction cavity to the second end of the heat conduction rod and is dissipated through the cooling media in the third cavity. According to the cooling structure of an inner rotor motor, the good heat dissipating effects of the stator and the rotor are obtained, and meanwhile the strict requirements for insulation, seal and volume are satisfied.
Description
Technical field
The application relates to a kind of inner rotor motor.
Background technology
Different with the relative position between the rotor according to stator, motor can be divided into two types of internal rotor and external rotors.The rotor of inner rotor motor is by stator surrounding, and promptly rotor is interior.The rotor of external rotor electric machine surrounds stator, and promptly rotor outside.
The permagnetic synchronous motor that in new-energy automobile, adopts internal rotor usually at present owing to the restriction in space with to high performance pursuit, makes the stator of this internal rotor permanent-magnetic synchronous machine and the heating of rotor become the problem that must pay close attention to as drive motors.
The cooling structure of stator of existing inner rotor motor is that a coolant jacket is peripheral at stator core with the form fix of interference fit or interference fits.This coolant jacket is generally metal material, wherein is designed with the runner of coolant.The heat that stator core and winding send is just taken away through flowing of coolant.
Under the conventional situation, because the restriction of space and Sealing Technology is not adopted extra heat dissipation design for rotor.The heat that rotor core and permanent magnet (magnet steel) send is delivered to the rotor bearing at two ends through armature spindle, is delivered to coolant jacket by rotor bearing through forward and backward end cap again.Because this heat radiation road is through longer, thermal resistance is bigger, rotor high rotating speed during with high pulling torque output heat can not shed well, cause that rotor temperature rise is too high, magnet steel demagnetization and be difficult to export high pulling torque, influence motor performance.If the raising motor performance just need be selected higher, the resistant to elevated temperatures magnetic steel material of cost for use, cause whole motor cost higher, the product lacking of market competition ability.
For this reason, from reducing motor cost, the consideration that improves motor performance, the necessary temperature that reduces rotor.The current rotor cooling structure that some inner rotor motors also occur.Its general thought is to the direct coolant in armature spindle inside, and this design can reduce the temperature of rotor really well, but to having brought new risk on insulating properties, the sealing again.
Be example with the internal rotor permanent-magnetic synchronous machine on the new-energy automobile still, consider the security requirement of automobile, the high-tension electricity part of motor does not allow the entering of conducting liquid.But cooling agent is flowed in armature spindle, and one side needs to adopt dynamic sealing technology to form the runner of sealing, need provide bigger pressure to overcome flow resistance to coolant on the other hand.In the E-Drive of new-energy automobile cooling system, this pressure reaches 2.5Bar, and so high pressure has proposed very large challenge to movable sealing.Even the pressure to coolant provided is so not big, can make its pressure that overcomes flow resistance also can bring risk to the movable sealing effect of coolant.Get into the high-tension electricity part in case the coolant of these conductions is revealed, will bring influence difficult to the appraisal automotive safety.
If to adopting nonconducting thermally conductive grease material in the rotor cooling structure of internal rotor permagnetic synchronous motor, will outside the E-Drive of new-energy automobile cooling system (only comprising cooling structure of stator in this system), design by the runner of newly-built rotor cooling structure so.Because it is limited to be used for the space of installing drive motor in the new-energy automobile, respectively setting up cooling system that a cover comprises runner for stator, rotor is unusual difficulty.
Thereby, how can be under the limited prerequisite of installing space, for the stator and the rotor design of inner rotor motor goes out a cover cooling structure, and can guarantee insulating properties, the sealing between cooling structure and the motor, just become a problem demanding prompt solution.
Summary of the invention
The application's technical problem to be solved provides a kind of cooling structure of inner rotor motor, can satisfy strict spatial constraints and seal request, and can realize the great heat radiation effect to stator and rotor.
For solving the problems of the technologies described above, the cooling structure of a kind of inner rotor motor of the application, said inner rotor motor comprises armature spindle, rotor portions, stator department, front end housing and capping; Said cooling structure comprises the 3rd cavity between front end housing and the capping, and the 3rd cavity is the part of coolant guiding channel;
Have thermal conductive cavity in the armature spindle, its opening is located at the side that armature spindle is positioned at front end housing, and its inside has heat-conducting medium;
First end of heat conductive rod is positioned at thermal conductive cavity and contacts with heat-conducting medium, and second end is positioned at the 3rd cavity and contacts with coolant, adopts the static seal mode to seal between this second end and the front end housing;
Adopt the movable sealing mode to seal between said armature spindle and the heat conductive rod;
The heat of rotor portions and armature spindle is delivered to heat conductive rod second end through first end of the heat conductive rod in the thermal conductive cavity, and dispels the heat via the coolant in the 3rd cavity.
The cooling structure of the another kind of inner rotor motor of the application, said inner rotor motor comprises armature spindle, rotor portions, stator department, front end housing and capping; Said cooling structure comprises the 3rd cavity between front end housing and the capping, and the 3rd cavity is the part of coolant guiding channel;
Be provided with thermal conductive cavity in the armature spindle, its opening is located at the side that armature spindle is positioned at front end housing, and its inside has heat-conducting medium;
One end of heat conductive rod is positioned at thermal conductive cavity and contacts with the heat-conducting medium of armature spindle, and the other end and front end housing adopt the static seal mode to seal;
Adopt the movable sealing mode to seal between said armature spindle and the heat conductive rod;
Have a cavity in the said heat conductive rod, its opening communicates with the 3rd cavity;
Cavity in the said heat conductive rod is also as the part of coolant guiding channel;
The heat of rotor portions and armature spindle passes to heat conductive rod through the heat-conducting medium in the thermal conductive cavity, and dispels the heat via the coolant in the cavity in the heat conductive rod.
See also Fig. 1, Fig. 3, in above-mentioned two schemes:
Said rotor portions is meant the rotor core 7 of encirclement armature spindle 5 and the permanent magnet 3 on the rotor core 7.
Said stator department is meant the stator core 2 that surrounds rotor core 7 non-contiguously.
The two ends of said armature spindle 5 all have end cap, and wherein an end is not exported torque, and the end cap of this end is called front end housing 9; Other end output torque, the end cap of this end is called rear end cap 8.The outside of front end housing 9 has capping 13.
Said movable sealing mode be in packing seal, contact seal, non-contacting seal, sealing ring, disc, the sealing thread any one or multiple.
Said static seal mode be ring flange connect in gasket seal, the sealing of O shape ring, rubber sealing, the packing seal any one or multiple.
Preferably, the heat-conducting medium in the thermal conductive cavity 6 is non-conductive.
Compare with the cooling structure of existing inner rotor motor, the improvement that the application did concentrates on armature spindle inside, thereby the shared space of whole inner rotor motor do not increase, and is applicable to narrow and small installing space.The application offers thermal conductive cavity in armature spindle inside, is wherein sealing nonconducting heat-conducting medium with dynamic sealing technology.One end of heat conductive rod is soaked in this heat-conducting medium, the approach that distributes as the rotor heat.The other end of heat conductive rod is arranged in the coolant runner, or offers the part of cavity as the coolant runner in the heat conductive rod, and this two sets of plan all adopts the static seal technology that heat conductive rod and front end housing are sealed.Like this, the reliable static seal technology of the coolant utilization of conduction is sealed in the runner, and nonconducting heat-conducting medium utilizes dynamic sealing technology to be sealed in not to be had in the armature spindle of pressure reduction.Even have heat-conducting medium that oozing out a little arranged in long-term work, also can the electric property of motor do not impacted.Thereby the application has satisfied the strict demand of insulation, sealing when obtaining good stator, rotor radiating effect.Adopt after the application, the temperature rise of the armature spindle of inner rotor motor, rotor core and permanent magnet is inhibited, and helps reducing the magnet steel demagnetization, promotes motor performance.So just, can adopt lower-cost permanent magnet, thereby reduce the whole cost of motor.
Description of drawings
Fig. 1 is the sketch map of embodiment one of the cooling structure of the application's inner rotor motor.
Fig. 2 a is the overall schematic of runner 20 among Fig. 1.
Fig. 2 b is the overall schematic of heat conductive rod 11 among Fig. 1.
Fig. 2 c is the sketch map of the 11a of heat conductive rod first among Fig. 2 b.
Fig. 2 d is that A-A among Fig. 1 is to generalized section.
Fig. 3 is the sketch map of embodiment two of the cooling structure of the application's inner rotor motor.
Fig. 4 is the overall schematic of runner 20 among Fig. 3.
Description of reference numerals among the figure: 1 is coolant jacket; 2 is stator core; 3 is permanent magnet; 4 is rotor bearing; 5 is armature spindle; 6 is thermal conductive cavity; 7 is rotor core; 8 is rear end cap; 9 is front end housing; 10 is sealing ring; 11 is heat conductive rod; 11a is heat conductive rod first end; 11b is heat conductive rod second end; 11c is the heat conductive rod interlude; 111 is main body; 112 is protruding; 113 is the chassis; 114 is protruding; 12 is the heat conductive rod bearing; 13 are capping; 14 is coolant entrance; 15 is coolant outlet; 16 is diaphragm; 17 is the heat conductive rod cavity; 20 is runner; 20a is first cavity; 20b is second cavity; 20c is the 3rd cavity; 20d is the 4th cavity; 20e is the 5th cavity; 201 is two ends; 202 is middle.
Embodiment
See also Fig. 1, this is the longitudinal sectional drawing of embodiment one of the cooling structure of the application's inner rotor motor.Rotor core 7 surrounds armature spindle 5, and rotates thereupon.On the surface of rotor core 7, post or the surface is embedded with permanent magnet 3.Stator core 2 surrounds rotor core 7, and has certain interval between the two.Have front end housing 9, the second sides (this side output torque) in first side (this side is not exported torque) of stator core 2 and armature spindle 5 and have rear end cap 8.Stator core 2 is static connection with front end housing 9, rear end cap 8.Armature spindle 5 is dynamically connected with front end housing 9, rear end cap 8 respectively through rotor bearing 4, and rotor core 7 all has certain interval with front end housing 9, rear end cap 8.Armature spindle 5 is through exposing the end output torque outside rear end cap 8.In mechanical design field, interfix, can not do the static connection that is called of relative motion between the connected piece, bolt for example, riveted joint, welding etc.Can do being called of relative motion by the certain movement form between the connected piece and be dynamically connected for example bearing connection etc.
Please consult Fig. 1 and Fig. 2 a simultaneously, what tightly contact in the periphery of stator core 2 and with it is coolant jacket 1, and its both sides also are static connection with front end housing 9, rear end cap 8.Have the first cavity 20a of cylindrical shape in the coolant jacket 1, and offer coolant entrance 14 and coolant outlet 15.The second cavity 20b that in front end housing 9, has tubulose, and communicate with the first cavity 20a with the intersection of front end housing 9 at coolant jacket 1.The outside at front end housing 9 also has capping 13, has the 3rd cavity 20c between front end housing 9 and the capping 13, and communicates with the second cavity 20b with the intersection of capping 13 at front end housing 9.The first cavity 20a, the second cavity 20b and the 3rd cavity 20c have constituted the coolant flow passages of accomplishing 20.Cooling agent is from 14 entering that enter the mouth, according to the first cavity 20a, and------the 3rd cavity 20c---the second cavity 20b---order of the first cavity 20a is from exporting 15 outflows and taking away heat on the way for the second cavity 20b.
Please consult Fig. 1 and Fig. 2 b simultaneously, have thermal conductive cavity 6 in armature spindle 5 inside, its opening is in first side of armature spindle 5.In thermal conductive cavity 6, has nonconducting conduction oil, for example shell conduction oil S2 etc.The first end 11a of at least one heat conductive rod 11 extend among the thermal conductive cavity 6 and is soaked in the conduction oil, and the second end 11b extend among the 3rd cavity 20c, and interlude 11c connects the first end 11a and the second end 11b.Adopt the static seal technology between heat conductive rod 11 and the front end housing 9, for example: ring flange connects gasket seal, the sealing of O shape ring, rubber sealing, packing seal etc.Adopt the technology that is dynamically connected between heat conductive rod 11 and the armature spindle 5, for example the heat conductive rod bearing 12.When armature spindle 5 rotated, it is static that heat conductive rod 11 still keeps like this.Adopt dynamic sealing technology between heat conductive rod 11 and the armature spindle 5, for example: one or more combinations of packing seal, contact seal, non-contacting seal, sealing ring 10, disc, sealing thread etc.When armature spindle 5 rotated, the opening part of thermal conductive cavity 6 still can keep sealing like this.
The cooling structure of the inner rotor motor of the foregoing description one, the periphery of stator core 2 is surrounded and closely contact by the coolant jacket 1 of metal material.The heat of stator core 2 is just taken away through the cooling agent of flowing through in the first cavity 20a in the coolant jacket 1.Thermal conductive cavity 6 and the nonconducting conduction oil of filling are offered in armature spindle 5 inside, are wherein soaking the heat conductive rod first end 11a.Heat conductive rod 11 is metal material normally, can be solid copper rod, aluminium bar etc., also can be hollow metal fever tubular construction, is filled with the PCM phase-change material inner sealing.During machine operation, the conduction oil high-speed motion that the armature spindle 5 of high speed rotating drives in the thermal conductive cavity 6.Conduction oil is made the heat transferred of armature spindle 5, rotor core 7 and permanent magnet 3 arrive the heat conductive rod first end 11a by the heat conductive rod first end 11a disturbance, is delivered to the heat conductive rod second end 11b again fast, and is taken away by the cooling agent of flowing through among the 3rd cavity 20c.
In order to strengthen the heat exchange effect between the conduction oil in heat conductive rod first end 11a and the thermal conductive cavity 6, the surface area that the heat conductive rod first end 11a is soaked in the conduction oil is the bigger the better.Fig. 2 c has provided the embodiment of the heat conductive rod first end 11a, and its main body 111 is cylindrical, has many places convexity 112 at lateral surface, is also referred to as " fin " structure, thereby has greatly increased surface area.Preferably, these protruding 112 directions radially outward towards main body 111.Alternatively, the heat conductive rod first end 11a has the changeover portion identical shaped with interlude 11c near the part of interlude 11c.During machine operation, the conduction oil high-speed motion that the armature spindle 5 of high speed rotating drives in the thermal conductive cavity 6.Conduction oil is by convexity (fin) 112 disturbances on the heat conductive rod first end 11a, and the contact area that these convexities 112 have increased between heat conductive rod first end 11a and the conduction oil has been strengthened the exchange capability of heat between armature spindle 5 and the heat conductive rod first end 11a.
Replacedly, also can make the heat conductive rod first end 11a integral body cylindrical, process the screw-shaped shallow slot, equally can play the effect that increases surface area at lateral surface.Preferably; These shallow slots are guiding gutters that the fluid motion rule during according to the conduction oil high-speed motion designs; Make conduction oil fully to flow, thereby improve the exchange capability of heat between armature spindle 5 and the heat conductive rod first end 11a on the surface of the heat conductive rod first end 11a.
See also Fig. 2 a, Fig. 2 b and Fig. 2 d, the 3rd cavity 20c of the foregoing description one comprises two end portions 201 and mid portion 202.Two end portions 201 can be a tubulose, so that be connected mutually with the second cavity 20b.202 of mid portions are the circles that obviously strengthen than two end portions 201, square etc.The heat conductive rod second end 11b is located among the mid portion 202 of the 3rd cavity 20c.The heat conductive rod second end 11b comprise chassis 113 with and on a plurality of protruding 114, these are protruding 114 towards cooling agent, thereby help realizing fully contacting of cooling agent and the heat conductive rod second end 11b.Chassis 113 can have the diameter that obviously strengthens than heat conductive rod interlude 11c.
Preferably, protruding 114 comprise having mellow and full surface with a plurality of first protruding 114a that reduces flow resistance, keep off protruding 114b, get into the shunting convexity 114c of the direction of the 3rd cavity 20c in the face of cooling agent at the sidewall of the 3rd cavity 20c and lattice between the first protruding crowd 114a again.With Fig. 2 d is example; Shunt roughly semicircular in shape of protruding 114c; On the direction that directly gets into the 3rd cavity 20c, offer the less slit of spacing and get into the first protruding crowd 114a to hold less cooling agent in the face of cooling agent; Its arc outer wall makes cooling agent shunt to both sides, and on the direction that gets into the 3rd cavity 20c more away from cooling agent, offers the big more cavity of spacing, thereby makes cooling agent get into the first protruding crowd 114a equably as far as possible.Because have certain cavity between the first protruding crowd 114a and the 3rd cavity 20c, lattice keep off protruding 114b and just stop up these cavitys, force the cooling agent first convexity crowd 114a that flows through.More than design can greatly strengthen the heat exchange effect between cooling agent and the heat conductive rod second end 11b.
See also Fig. 3, this is the longitudinal sectional drawing of embodiment two of the cooling structure of the application's inner rotor motor.Wherein the structure of inner rotor motor is identical with embodiment one, and rotor core 7 surrounds armature spindle 5, and rotates thereupon.On the surface of rotor core 7, post or the surface is embedded with permanent magnet 3.Stator core 2 surrounds rotor core 7, and has certain interval between the two.Have front end housing 9, the second sides in first side of stator core 2 and armature spindle 5 and have rear end cap 8.Stator core 2 is static connection with front end housing 9, rear end cap 8.Armature spindle 5 is dynamically connected with front end housing 9, rear end cap 8 respectively through rotor bearing 4, and rotor core 7 all has certain interval with front end housing 9, rear end cap 8.Armature spindle 5 is through exposing the end output torque outside rear end cap 8.
Please consult Fig. 3 and Fig. 4 simultaneously, what tightly contact in the periphery of stator core 2 and with it is coolant jacket 1, and its both sides also are static connection with front end housing 9, rear end cap 8.Have the first cavity 20a of cylindrical shape in the coolant jacket 1, and offer coolant entrance 14 and coolant outlet 15.The second cavity 20b that in front end housing 9, has tubulose, and communicate with the first cavity 20a with the intersection of front end housing 9 at coolant jacket 1.The outside at front end housing 9 also has capping 13, has the 3rd cavity 20c between front end housing 9 and the capping 13, and communicates with the second cavity 20b with the intersection of capping 13 at front end housing 9.
See also Fig. 3, have thermal conductive cavity 6 in armature spindle 5 inside, its opening is in first side of armature spindle 5.In thermal conductive cavity 6, has nonconducting conduction oil.One end of at least one heat conductive rod 11 extend among the thermal conductive cavity 6 and is soaked in the conduction oil, and other end employing static connection and static seal or integrally casting moulding or solder technology etc. are fixed in front end housing 9 and seal with its maintenance.These are maturation process, can guarantee the positiver sealing effect to coolant flow passages.Adopt the technology that is dynamically connected between heat conductive rod 11 and the armature spindle 5, for example the heat conductive rod bearing 12.When armature spindle 5 rotated, it is static that heat conductive rod 11 still keeps like this.Adopt dynamic sealing technology between heat conductive rod 11 and the armature spindle 5, for example one or more combinations of sealing ring 10, disc, sealing thread etc.When armature spindle 5 rotated, the opening part of thermal conductive cavity 6 still can keep sealing like this.
Please consult Fig. 3 and Fig. 4 simultaneously, heat conductive rod 11 inside have a cavity 17, and the opening of this cavity 17 is at the 3rd cavity 20c.Diaphragm 16 is divided into two this cavity 17, has formed the 4th cavity 20d, the 5th cavity 20e.Only the end at this cavity 17 is integrated the 4th cavity 20d and the 5th cavity 20e again.The first cavity 20a, the second cavity 20b, the 3rd cavity 20c, the 4th cavity 20d and the 5th cavity 20e have constituted complete coolant flow passages 20.Cooling agent is from 14 entering that enter the mouth;---------------the 3rd cavity 20c---the second cavity 20b---order of the first cavity 20a is from exporting 15 outflows and taking away heat on the way for the 5th cavity 20e for the 4th cavity 20d for the 3rd cavity 20c for the second cavity 20b according to the first cavity 20a.
The cooling structure of the inner rotor motor of the foregoing description two, the periphery of stator core 2 is surrounded and is in contact with one another by the coolant jacket 1 of metal material.The heat of stator core 2 is just taken away through the cooling agent of flowing through in the first cavity 20a in the coolant jacket 1.Thermal conductive cavity 6 and the nonconducting conduction oil of filling are offered in armature spindle 5 inside, are wherein soaking heat conductive rod 11.Heat conductive rod 11 inside are offered cavity 17 and are divided into by diaphragm and make the longest two parts of cooling agent flowing through channel---the 4th cavity 20d and the 5th cavity 20e.During machine operation; The armature spindle 5 of high speed rotating arrives heat conductive rod 11 to the heat transferred of armature spindle 5, rotor core 7 and permanent magnet 3 through conduction oil; Cooling agent gets into after the 3rd cavity 20c, and---heat of heat conductive rod 11 is on the way crossed and taken away to the sequential flow of the 3rd cavity 20c to the 4th cavity 20d---the 5th cavity 20e---according to the 3rd cavity 20c.
Similar with embodiment one, the heat conductive rod 11 among the embodiment two can be divided into the first end 11a and interlude 11c, shown in Fig. 2 b, has lacked the second end 11b than embodiment one.Can design " fin " or guiding gutter structure on the surface of the heat conductive rod first end 11a, shown in Fig. 2 c, through increase that surface area strengthens and conduction oil between exchange capability of heat.
The shape of the 3rd cavity 20c of embodiment two can be identical with embodiment one, shown in Fig. 2 d; Also can be merely simple tubulose, get final product so that be connected mutually with the second cavity 20b.
Among above-mentioned two embodiment, said capping 13 mainly is to consider in order to assemble the convenient of heat conductive rod 11 with the separate design of front end housing 9.Replacedly, capping 13 also can be integrated with front end housing 9, and this moment, second cavity and the 3rd cavity were all in incorporate front end housing.
The technical advantage of the cooling structure of above-mentioned two described inner rotor motors of embodiment is:
1, avoided the short circuit hidden danger of motor internal.This is that even if the movable sealing between armature spindle 5 and the heat conductive rod 11 has a little inefficacy, the conduction oil that small amount of leakage goes out can not have a negative impact to the electric property of motor yet, promptly can not cause the motor short circuit owing to the nonconducting conduction oil of thermal conductive cavity 6 inner fillings.
2, sealing effectiveness is good.What whole coolant flow passages 20 was leaked to motor internal the most easily is exactly between front end housing 9 and the heat conductive rod 11.Owing to do not have relative motion between heat conductive rod 11 and the front end housing 9, can adopt ripe static seal technology to guarantee that sealing effectiveness is good.So just thoroughly stop the leakage of the cooling agent in the coolant flow passages 20, made cooling agent still can adopt conductive traditional material.
In sum, the application is guaranteeing under the prerequisite of positiver sealing, realizes the direct cooling to armature spindle, thereby has improved the radiating effect of rotor greatly, helps reducing temperature of rotor and improves motor performance.
More than be merely the application's preferred embodiment, and be not used in qualification the application.For a person skilled in the art, the application can have various changes and variation.All within the application's spirit and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the application's the protection range.
Claims (14)
1. the cooling structure of an inner rotor motor, said inner rotor motor comprises armature spindle, rotor portions, stator department, front end housing and capping; It is characterized in that said cooling structure comprises the 3rd cavity between front end housing and the capping, the 3rd cavity is the part of coolant guiding channel;
Have thermal conductive cavity in the armature spindle, its opening is located at the side that armature spindle is positioned at front end housing, and its inside has heat-conducting medium;
First end of heat conductive rod is positioned at thermal conductive cavity and contacts with heat-conducting medium, and second end is positioned at the 3rd cavity and contacts with coolant, adopts the static seal mode to seal between this second end and the front end housing;
Adopt the movable sealing mode to seal between said armature spindle and the heat conductive rod;
The heat of rotor portions and armature spindle is delivered to heat conductive rod second end through first end of the heat conductive rod in the thermal conductive cavity, and dispels the heat via the coolant in the 3rd cavity.
2. the cooling structure of inner rotor motor according to claim 1 is characterized in that, said cooling structure also include be enclosed in the stator department outside and with the contacted coolant jacket of stator department, its inside has first cavity; Also have second cavity in the said front end housing, this second cavity connects first cavity and the 3rd cavity, and has constituted complete coolant guiding channel, stator, shared this coolant guiding channel heat radiation of rotor.
3. the cooling structure of inner rotor motor according to claim 1 is characterized in that, the surface of said heat conductive rod first end has convexity or guiding gutter, through increase that surface area strengthens and heat-conducting medium between exchange capability of heat.
4. according to the cooling structure of claim 1 or 3 described inner rotor motors, it is characterized in that second end of said heat conductive rod comprises the bulge-structure on chassis and the chassis, said bulge-structure contacts with the interior coolant of the 3rd cavity.
5. the cooling structure of inner rotor motor according to claim 1 is characterized in that, said movable sealing mode is any in packing seal, contact seal, non-contacting seal, sealing ring, disc, the sealing thread;
Said static seal mode is that ring flange connects any in gasket seal, the sealing of O shape ring, rubber sealing, the packing seal.
6. the cooling structure of inner rotor motor according to claim 1 is characterized in that, said heat-conducting medium is nonconducting conduction oil.
7. the cooling structure of inner rotor motor according to claim 1 is characterized in that, said capping and front end housing or two isolating constructions, or an incorporate structure.
8. the cooling structure of an inner rotor motor, said inner rotor motor comprises armature spindle, rotor portions, stator department, front end housing and capping; It is characterized in that said cooling structure comprises the 3rd cavity between front end housing and the capping, the 3rd cavity is the part of coolant guiding channel;
Be provided with thermal conductive cavity in the armature spindle, its opening is located at the side that armature spindle is positioned at front end housing, and its inside has heat-conducting medium;
One end of heat conductive rod is positioned at thermal conductive cavity and contacts with the heat-conducting medium of armature spindle, and the other end and front end housing adopt the static seal mode to seal;
Adopt the movable sealing mode to seal between said armature spindle and the heat conductive rod;
Have a cavity in the said heat conductive rod, its opening communicates with the 3rd cavity;
Cavity in the said heat conductive rod is also as the part of coolant guiding channel;
The heat of rotor portions and armature spindle passes to heat conductive rod through the heat-conducting medium in the thermal conductive cavity, and dispels the heat via the coolant in the cavity in the heat conductive rod.
9. the cooling structure of inner rotor motor according to claim 8; It is characterized in that; In the cavity in the said heat conductive rod diaphragm is set also, the cavity in the said heat conductive rod is divided into makes coolant flow through path the longest the 4th cavity and the 5th cavity.
10. the cooling structure of inner rotor motor according to claim 9 is characterized in that, said cooling structure also include be enclosed in the stator department outside and with the contacted coolant jacket of stator department, its inside has first cavity; Also have second cavity in the said front end housing, this second cavity connects first cavity and the 3rd cavity; First cavity, second cavity, the 3rd cavity, the 4th cavity and the 5th cavity have constituted complete coolant guiding channel, stator, shared this coolant guiding channel heat radiation of rotor.
11. the cooling structure of inner rotor motor according to claim 8 is characterized in that, the surface that said heat conductive rod is positioned at an end of thermal conductive cavity has convexity or guiding gutter, through increase that surface area strengthens and heat-conducting medium between exchange capability of heat.
12. the cooling structure of inner rotor motor according to claim 8 is characterized in that, said movable sealing mode is any in packing seal, contact seal, non-contacting seal, sealing ring, disc, the sealing thread;
Said static seal mode is that ring flange connects any in gasket seal, the sealing of O shape ring, rubber sealing, the packing seal.
13. the cooling structure of inner rotor motor according to claim 8 is characterized in that, said heat-conducting medium is nonconducting conduction oil.
14. the cooling structure of inner rotor motor according to claim 8 is characterized in that, said capping and front end housing or two isolating constructions, or an incorporate structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210270467.9A CN102810943B (en) | 2012-07-31 | 2012-07-31 | The cooling structure of inner rotor motor |
| PCT/CN2012/087394 WO2014019322A1 (en) | 2012-07-31 | 2012-12-25 | Cooling structure for internal rotor motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210270467.9A CN102810943B (en) | 2012-07-31 | 2012-07-31 | The cooling structure of inner rotor motor |
Publications (2)
| Publication Number | Publication Date |
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| CN102810943A true CN102810943A (en) | 2012-12-05 |
| CN102810943B CN102810943B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210270467.9A Active CN102810943B (en) | 2012-07-31 | 2012-07-31 | The cooling structure of inner rotor motor |
Country Status (2)
| Country | Link |
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| CN (1) | CN102810943B (en) |
| WO (1) | WO2014019322A1 (en) |
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Also Published As
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| WO2014019322A1 (en) | 2014-02-06 |
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