CN102810943B - The cooling structure of inner rotor motor - Google Patents
The cooling structure of inner rotor motor Download PDFInfo
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- CN102810943B CN102810943B CN201210270467.9A CN201210270467A CN102810943B CN 102810943 B CN102810943 B CN 102810943B CN 201210270467 A CN201210270467 A CN 201210270467A CN 102810943 B CN102810943 B CN 102810943B
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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
This application discloses a kind of cooling structure of inner rotor motor, described inner rotor motor comprises armature spindle, rotor portions, stator department, front end housing and capping; Described cooling structure comprises the 3rd cavity between front end housing and capping, and the 3rd cavity is as a part for coolant guiding channel; Have thermal conductive cavity in 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; The first end of heat conductive rod is positioned at thermal conductive cavity and contacts with heat-conducting medium, and the second end is positioned at the 3rd cavity and contacts with coolant, adopts static seal mode to seal between this second end and front end housing; Movable sealing mode is adopted to seal between described armature spindle and heat conductive rod; The heat of rotor portions and armature spindle is delivered to heat conductive rod second end by the heat conductive rod first end in thermal conductive cavity, and via the coolant heat radiation in the 3rd cavity.The application meets the strict demand of insulation, sealing, volume while obtaining good stator, rotor dispersing thermal effect.
Description
Technical field
The application relates to a kind of inner rotor motor.
Background technology
Different according to the relative position between stator from rotor, motor can be divided into internal rotor and external rotor two class.The rotor of inner rotor motor is by stator surrounding, and namely rotor is interior.The rotor of external rotor electric machine surrounds stator, and namely rotor outside.
In new-energy automobile, usually adopt the permagnetic synchronous motor of internal rotor as drive motors at present, due to the restriction in space with to high performance pursuit, make the heating of the stators and rotators of this internal rotor permanent-magnetic synchronous machine become a problem that must pay close attention to.
The cooling structure of stator of existing inner rotor motor is that a coolant jacket is fixed on stator core periphery with the form of interference fit or interference fits.This coolant jacket is generally metal material, is wherein designed with the runner of coolant.The heat that stator core and winding send just is taken away by the flowing of coolant.
Under conventional situation, due to the restriction of space and Sealing Technology, extra heat dissipation design is not adopted for rotor.The heat that rotor core and permanent magnet (magnet steel) send is delivered to the rotor bearing at two ends by armature spindle, then, rear end cap premenstrual by rotor bearing is delivered to coolant jacket.Because this heat radiation road is through longer, thermal resistance is comparatively large, and rotor heat when high rotating speed and high pulling torque export can not shed well, causes that rotor temperature rise is too high, magnet steel demagnetization and be difficult to export high pulling torque, affects motor performance.If improve motor performance, just need to select higher, the resistant to elevated temperatures magnetic steel material of cost, cause integrated motor cost higher, product lacks the market competitiveness.
For this reason, for reduction motor cost, improve the consideration of motor performance, the temperature of rotor must be reduced.The current rotor cooling structure also having occurred some inner rotor motors.Its general thought is to the direct coolant in armature spindle inside, and this design can reduce the temperature of rotor really well, but brings again new risk in insulating properties, sealing.
Still for the internal rotor permanent-magnetic synchronous machine on new-energy automobile, consider the security requirement of automobile, the high-tension electricity part of motor does not allow entering of conducting liquid.But cooling agent is flowed in armature spindle, needs on the one hand to adopt dynamic sealing technology to form closed runner, need on the other hand to provide larger pressure to overcome flow resistance to coolant.In the E-Drive cooling system of new-energy automobile, this pressure reaches 2.5Bar, and so high pressure proposes very large challenge to movable sealing.Even if the pressure provided coolant is so not large, its pressure overcoming flow resistance can be made also to bring risk to the movable sealing effect of coolant.Once the coolant of these conductions is leaked into high-tension electricity part, impact difficult to the appraisal will be brought on automotive safety.
If adopt nonconducting thermally conductive grease material in the rotor cooling structure to internal rotor permanent-magnetic synchronous machine, so will outside the E-Drive cooling system of new-energy automobile (only comprising cooling structure of stator in this system) runner design of newly-built rotor cooling structure.Due in new-energy automobile for installing the limited space of drive motors, it is very difficult for respectively setting up a set of cooling system comprising runner for stator, rotor.
Thus, how can under the limited prerequisite of installing space, the stators and rotators for inner rotor motor designs a set of cooling structure, and can guarantee insulating properties, the sealing between cooling structure and motor, just becomes a problem demanding prompt solution.
Summary of the invention
Technical problems to be solved in this application are to provide a kind of cooling structure of inner rotor motor, can meet strict spatial limitation and seal request, and can realize the great heat radiation effect to stators and rotators.
For solving the problems of the technologies described above, the cooling structure of a kind of inner rotor motor of the application, described inner rotor motor comprises armature spindle, rotor portions, stator department, front end housing and capping; Described cooling structure comprises the 3rd cavity between front end housing and capping, and the 3rd cavity is a part for coolant guiding channel;
Have thermal conductive cavity in 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;
The first end of heat conductive rod is positioned at thermal conductive cavity and contacts with heat-conducting medium, and the second end is positioned at the 3rd cavity and contacts with coolant, adopts static seal mode to seal between this second end and front end housing;
Movable sealing mode is adopted to seal between described armature spindle and heat conductive rod;
The heat of rotor portions and armature spindle is delivered to heat conductive rod second end by the heat conductive rod first end in thermal conductive cavity, and via the coolant heat radiation in the 3rd cavity.
The cooling structure of the another kind of inner rotor motor of the application, described inner rotor motor comprises armature spindle, rotor portions, stator department, front end housing and capping; Described cooling structure comprises the 3rd cavity between front end housing and capping, and the 3rd cavity is a part for coolant guiding channel;
Be provided with thermal conductive cavity in 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 static seal mode to seal;
Movable sealing mode is adopted to seal between described armature spindle and heat conductive rod;
Have a cavity in described heat conductive rod, its opening communicates with the 3rd cavity;
Cavity in described heat conductive rod is also as a part for coolant guiding channel;
The heat of rotor portions and armature spindle passes to heat conductive rod by the heat-conducting medium in thermal conductive cavity, and via the coolant heat radiation in the cavity in heat conductive rod.
Refer to Fig. 1, Fig. 3, in above-mentioned two schemes:
Described rotor portions refers to the permanent magnet 3 surrounded on the rotor core 7 of armature spindle 5 and rotor core 7.
Described stator department refers to the stator core 2 surrounding rotor core 7 non-contiguously.
The two ends of described armature spindle 5 all have end cap, wherein one end not Driving Torque, and the end cap of this one end is called front end housing 9; Other end Driving Torque, the end cap of this one end is called rear end cap 8.The outside of front end housing 9 has capping 13.
Described movable sealing mode be packing seal, contact sealing, non-contacting seal, sealing ring, disc, in sealing thread any one or multiple.
Described static seal mode be in the sealing of ring flange attachment spacers, the sealing of O shape ring, rubber sealing, packing seal any one or multiple.
Preferably, the heat-conducting medium in thermal conductive cavity 6 is non-conductive.
Compared with the cooling structure of existing inner rotor motor, the improvement that the application does concentrates on armature spindle inside, and the space thus shared by whole inner rotor motor does not increase, and is applicable to narrow and small installing space.The application offers thermal conductive cavity in armature spindle inside, wherein encapsulates nonconducting heat-conducting medium with dynamic sealing technology.One end of heat conductive rod is soaked in this heat-conducting medium, as the approach that rotor heat distributes.The other end of heat conductive rod is arranged in coolant runner, or offers the part of cavity as coolant runner in heat conductive rod, and this two sets of plan all adopts static seal technology to seal heat conductive rod and front end housing.Like this, the coolant of conduction utilizes reliable static seal technology to be sealed in 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 if there is heat-conducting medium to have oozing out a little in long-term work, also can not impact the electric property of motor.Thus the application meets the strict demand of insulation, sealing while obtaining good stator, rotor dispersing thermal effect.Adopt after the application, the temperature rise of the armature spindle of inner rotor motor, rotor core and permanent magnet is inhibited, and is conducive to reducing magnet steel demagnetization, lifting motor performance.So just, lower-cost permanent magnet can be adopted, thus reduce the holistic cost of motor.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment one of the cooling structure of the application's inner rotor motor.
Fig. 2 a is the overall schematic of runner 20 in Fig. 1.
Fig. 2 b is the overall schematic of heat conductive rod 11 in Fig. 1.
Fig. 2 c is the schematic diagram of heat conductive rod Part I 11a in Fig. 2 b.
Fig. 2 d is that A-A in Fig. 1 is to generalized section.
Fig. 3 is the schematic diagram of the embodiment two of the cooling structure of the application's inner rotor motor.
Fig. 4 is the overall schematic of runner 20 in Fig. 3.
Description of reference numerals in 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 heat conductive rod interlude; 111 is main body; 112 is protruding; 113 is chassis; 114 is protruding; 12 is heat conductive rod bearing; 13 is capping; 14 is coolant entrance; 15 is coolant outlet; 16 is diaphragm; 17 is heat conductive rod cavity; 20 is runner; 20a is the first cavity; 20b is the 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
Refer to Fig. 1, this is the longitudinal sectional drawing of the embodiment one of the cooling structure of the application's inner rotor motor.Rotor core 7 surrounds armature spindle 5, and rotates thereupon.The surface of rotor core 7 to be posted or 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 in first side (this side not Driving Torque) of stator core 2 and armature spindle 5, the second side (this side Driving Torque) has rear end cap 8.Stator core 2 and front end housing 9, rear end cap 8 are static connection.Armature spindle 5 is dynamically connected with front end housing 9, rear end cap 8 respectively by rotor bearing 4, and rotor core 7 and front end housing 9, rear end cap 8 all have certain interval.Armature spindle 5 is by exposing one end output torque outside rear end cap 8.In mechanical design field, interfix between connected piece, can not do relative motion be called static connection, such as bolt is fixed, riveted joint, welding etc.Being called of relative motion can be done by certain movement form between connected piece to be dynamically connected, such as bearing connection etc.
Please refer to Fig. 1 and Fig. 2 a, what tightly contact in the periphery of stator core 2 and with it is coolant jacket 1, and its both sides are also static connection with front end housing 9, rear end cap 8.There is in coolant jacket 1 first cavity 20a of cylindrical shape, and offer coolant entrance 14 and coolant outlet 15.There is the second cavity 20b of tubulose in front end housing 9, and communicate with the first cavity 20a with the intersection of front end housing 9 at coolant jacket 1.In the outside of front end housing 9, also there is capping 13, there is between front end housing 9 and capping 13 the 3rd cavity 20c, and communicate with the second cavity 20b with the intersection of capping 13 at front end housing 9.The coolant flow passages 20 that first cavity 20a, the second cavity 20b and the 3rd cavity 20c have constituted.Cooling agent enters from entrance 14, according to the first cavity 20a, and------the 3rd cavity 20c---the second cavity 20b---order of the first cavity 20a, flows out from outlet 15 and takes away heat on the way the second cavity 20b.
Please refer to Fig. 1 and Fig. 2 b, have thermal conductive cavity 6 in armature spindle 5 inside, its opening is in the first side of armature spindle 5.In thermal conductive cavity 6, there is nonconducting conduction oil, such as shell conduction oil S2 etc.The first end 11a of at least one heat conductive rod 11 to extend among thermal conductive cavity 6 and is soaked in conduction oil, and the second end 11b extend among the 3rd cavity 20c, and interlude 11c connects first end 11a and the second end 11b.Static seal technology is adopted, such as: the sealing of ring flange attachment spacers, the sealing of O shape ring, rubber sealing, packing seal etc. between heat conductive rod 11 and front end housing 9.The technology that is dynamically connected is adopted, such as heat conductive rod bearing 12 between heat conductive rod 11 and armature spindle 5.Like this when armature spindle 5 rotates, heat conductive rod 11 still keeps static.Dynamic sealing technology is adopted, such as: one or more combinations of packing seal, contact sealing, non-contacting seal, sealing ring 10, disc, sealing thread etc. between heat conductive rod 11 and armature spindle 5.Like this when armature spindle 5 rotates, the opening part of thermal conductive cavity 6 still can keep sealing.
The cooling structure of the inner rotor motor of above-described embodiment one, the periphery of stator core 2 is surrounded and close contact by the coolant jacket 1 of metal material.The heat of stator core 2 is just taken away by the cooling agent flowed through in the first cavity 20a in coolant jacket 1.Thermal conductive cavity 6 is offered and the nonconducting conduction oil of filling in armature spindle 5 inside, wherein soaks heat conductive rod first end 11a.Heat conductive rod 11 normally metal material, can be solid copper rod, aluminium bar etc., also can be hollow metal heat pipe structure, be filled with PCM phase-change material inner sealing.During machine operation, the armature spindle 5 of High Rotation Speed drives the conduction oil high-speed motion in thermal conductive cavity 6.Conduction oil, by heat conductive rod first end 11a disturbance, makes the heat of armature spindle 5, rotor core 7 and permanent magnet 3 be delivered to heat conductive rod first end 11a, is delivered to again heat conductive rod second end 11b fast, and is taken away by the cooling agent flowed through in the 3rd cavity 20c.
In order to strengthen the heat transfer effect between the conduction oil in heat conductive rod first end 11a and thermal conductive cavity 6, the surface area that heat conductive rod first end 11a is soaked in conduction oil is the bigger the better.Fig. 2 c gives an embodiment of heat conductive rod first end 11a, and its main body 111 is cylindrical, has many places projection 112 at lateral surface, also referred to as " fin " structure, thus greatly increases surface area.Preferably, these projections 112 are towards the radially outward direction of main body 111.Alternatively, heat conductive rod first end 11a has the changeover portion with interlude 11c same shape near the part of interlude 11c.During machine operation, the armature spindle 5 of High Rotation Speed drives the conduction oil high-speed motion in thermal conductive cavity 6.Conduction oil is by projection (fin) 112 disturbance on heat conductive rod first end 11a, and these projections 112 increase the contact area between heat conductive rod first end 11a and conduction oil, enhance the exchange capability of heat between armature spindle 5 and heat conductive rod first end 11a.
Alternatively, heat conductive rod first end 11a entirety also can be made cylindrical, process screw-shaped shallow slot at lateral surface, equally can play the effect increasing surface area.Preferably, these shallow slots are the guiding gutters designed according to fluid motion rule during conduction oil high-speed motion, conduction oil fully can be flowed on the surface of heat conductive rod first end 11a, thus improve the exchange capability of heat between armature spindle 5 and heat conductive rod first end 11a.
Refer to Fig. 2 a, Fig. 2 b and Fig. 2 d, the 3rd cavity 20c of above-described embodiment one comprises two end portions 201 and mid portion 202.Two end portions 201 can be tubulose, so that be connected with the second cavity 20b phase.Mid portion 202 is the circle, square etc. obviously strengthened than two end portions 201.Heat conductive rod second end 11b is located among the mid portion 202 of the 3rd cavity 20c.Heat conductive rod second end 11b comprises chassis 113 and multiple protruding 114 on it, and these projections 114 towards cooling agent, thus are conducive to realizing fully contacting of cooling agent and heat conductive rod second end 11b.Chassis 113 can have the diameter obviously strengthened than heat conductive rod interlude 11c.
Preferably, protruding 114 comprise again have mellow and full surface to reduce multiple first protruding 114a of flow resistance, the lattice between the sidewall and the first protruding crowd 114a of the 3rd cavity 20c keep off protruding 114b, enter the shunting projection 114c in the direction of the 3rd cavity 20c in the face of cooling agent.For Fig. 2 d, shunt protruding 114c roughly semicircular in shape, the first protruding crowd 114a is entered to hold less cooling agent in the direct less gap of spacing that offers on the direction that cooling agent enters the 3rd cavity 20c, its arc outer wall makes cooling agent shunt to both sides, and offer the larger cavity of spacing on the direction more entering the 3rd cavity 20c away from cooling agent, thus make cooling agent enter the first protruding crowd 114a equably as far as possible.Owing to having certain cavity between the first protruding crowd 114a and the 3rd cavity 20c, lattice keep off protruding 114b and just block these cavitys, force cooling agent to flow through the first protruding crowd 114a.More than design the heat transfer effect that can greatly strengthen between cooling agent and heat conductive rod second end 11b.
Refer to Fig. 3, this is the longitudinal sectional drawing of the 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.The surface of rotor core 7 to be posted or 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 in the first side of stator core 2 and armature spindle 5, the second side has rear end cap 8.Stator core 2 and front end housing 9, rear end cap 8 are static connection.Armature spindle 5 is dynamically connected with front end housing 9, rear end cap 8 respectively by rotor bearing 4, and rotor core 7 and front end housing 9, rear end cap 8 all have certain interval.Armature spindle 5 is by exposing one end output torque outside rear end cap 8.
Please refer to Fig. 3 and Fig. 4, what tightly contact in the periphery of stator core 2 and with it is coolant jacket 1, and its both sides are also static connection with front end housing 9, rear end cap 8.There is in coolant jacket 1 first cavity 20a of cylindrical shape, and offer coolant entrance 14 and coolant outlet 15.There is the second cavity 20b of tubulose in front end housing 9, and communicate with the first cavity 20a with the intersection of front end housing 9 at coolant jacket 1.In the outside of front end housing 9, also there is capping 13, there is between front end housing 9 and capping 13 the 3rd cavity 20c, and communicate with the second cavity 20b with the intersection of capping 13 at front end housing 9.
Refer to Fig. 3, have thermal conductive cavity 6 in armature spindle 5 inside, its opening is in the first side of armature spindle 5.In thermal conductive cavity 6, there is nonconducting conduction oil.One end of at least one heat conductive rod 11 to extend among thermal conductive cavity 6 and is soaked in conduction oil, and the other end adopts static connection and static seal or integrally casting is shaping or solder technology etc. is fixed on front end housing 9 and seals with its maintenance.These are maturation process, can guarantee the positiver sealing effect to coolant flow passages.The technology that is dynamically connected is adopted, such as heat conductive rod bearing 12 between heat conductive rod 11 and armature spindle 5.Like this when armature spindle 5 rotates, heat conductive rod 11 still keeps static.Dynamic sealing technology is adopted, one or more combinations of such as sealing ring 10, disc, sealing thread etc. between heat conductive rod 11 and armature spindle 5.Like this when armature spindle 5 rotates, the opening part of thermal conductive cavity 6 still can keep sealing.
Please refer to Fig. 3 and Fig. 4, heat conductive rod 11 inside has a cavity 17, and the opening of this cavity 17 is at the 3rd cavity 20c.This cavity 17 is divided into two by diaphragm 16, defines the 4th cavity 20d, the 5th cavity 20e.Only at the end of this cavity 17, the 4th cavity 20d and the 5th cavity 20e is integrated again.First cavity 20a, the second cavity 20b, the 3rd cavity 20c, the 4th cavity 20d and the 5th cavity 20e constitute complete coolant flow passages 20.Cooling agent enters from entrance 14, according to the first cavity 20a,---------------the 3rd cavity 20c---the second cavity 20b---order of the first cavity 20a, flows out from outlet 15 and takes away heat on the way the 5th cavity 20e the 4th cavity 20d the 3rd cavity 20c the second cavity 20b.
The cooling structure of the inner rotor motor of above-described embodiment two, the periphery of stator core 2 is surrounded by the coolant jacket 1 of metal material and contacts with each other.The heat of stator core 2 is just taken away by the cooling agent flowed through in the first cavity 20a in coolant jacket 1.Thermal conductive cavity 6 is offered and the nonconducting conduction oil of filling in armature spindle 5 inside, wherein soaks heat conductive rod 11.Heat conductive rod 11 inside offers cavity 17 and diversed separator lined is the two parts making cooling agent flowing through channel the longest---the 4th cavity 20d and the 5th cavity 20e.During machine operation, the armature spindle 5 of High Rotation Speed is delivered to heat conductive rod 11 by conduction oil the heat of armature spindle 5, rotor core 7 and permanent magnet 3, after cooling agent enters the 3rd cavity 20c, according to the 3rd cavity 20c,---the 4th cavity 20d---the 5th cavity 20e---the 3rd cavity 20c sequentially passes through and takes away the heat of heat conductive rod 11 on the way.
Similar with embodiment one, the heat conductive rod 11 in embodiment two can be divided into first end 11a and interlude 11c, as shown in Figure 2 b, has lacked the second end 11b than embodiment one." fin " or guide trough structure can be designed on the surface of heat conductive rod first end 11a, as shown in Figure 2 c, strengthen the exchange capability of heat between conduction oil by increase surface area.
The shape of the 3rd cavity 20c of embodiment two can be identical with embodiment one, as shown in Figure 2 d; May also be only simple tubulose, so that be connected with the second cavity 20b phase.
In above-mentioned two embodiments, described capping 13 is mainly considered to assemble the convenient of heat conductive rod 11 with the separate design of front end housing 9.Alternatively, capping 13 and front end housing 9 also can be integrated, and now the second cavity and the 3rd cavity are all in the front end housing of integration.
The technical advantage of the cooling structure of the inner rotor motor described in above-mentioned two embodiments is:
1, the short circuit hidden danger of motor internal is avoided.This is due to the nonconducting conduction oil of the inner filling of thermal conductive cavity 6, even if the movable sealing between armature spindle 5 and heat conductive rod 11 has a little inefficacy, the conduction oil leaked out on a small quantity also can not have a negative impact to the electric property of motor, namely can not cause electric motor short circuit.
2, sealing effectiveness is good.What whole coolant flow passages 20 was the most easily leaked to motor internal is exactly between front end housing 9 and heat conductive rod 11.Owing to there is no relative motion between heat conductive rod 11 and front end housing 9, ripe static seal technology can be adopted to guarantee that sealing effectiveness is good.So just thoroughly stop the leakage of the cooling agent in coolant flow passages 20, make cooling agent still can adopt conductive traditional material.
In sum, the application, under the prerequisite guaranteeing positiver sealing, realizes the direct cooling to armature spindle, thus substantially increases the radiating effect of rotor, is conducive to reducing temperature of rotor and improving motor performance.
These are only the preferred embodiment of the application, and be not used in restriction the application.For a person skilled in the art, the application can have various modifications and variations.Within all spirit in the application and principle, any amendment done, equivalent replacement, improvement etc., within the protection range that all should be included in the application.
Claims (14)
1. a cooling structure for inner rotor motor, described inner rotor motor comprises armature spindle, rotor portions, stator department, front end housing and capping; It is characterized in that, described cooling structure comprises the 3rd cavity between front end housing and capping, and the 3rd cavity is a part for coolant guiding channel;
Have thermal conductive cavity in 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;
The first end of heat conductive rod is positioned at thermal conductive cavity and contacts with heat-conducting medium, and the second end is positioned at the 3rd cavity and contacts with coolant, adopts static seal mode to seal between this second end and front end housing;
Movable sealing mode is adopted to seal between described armature spindle and heat conductive rod;
The heat of rotor portions and armature spindle is delivered to heat conductive rod second end by the heat conductive rod first end in thermal conductive cavity, and via the coolant heat radiation in the 3rd cavity.
2. the cooling structure of inner rotor motor according to claim 1, is characterized in that, described cooling structure also includes the coolant jacket being enclosed in and contacting outside stator department and with stator department, and its inside has the first cavity; Also have the second cavity in described front end housing, this second cavity connects the first cavity and the 3rd cavity, and constitutes complete coolant guiding channel, and stator, rotor share the heat radiation of this coolant guiding channel.
3. the cooling structure of inner rotor motor according to claim 1, is characterized in that, the surface of described heat conductive rod first end has projection or guiding gutter, strengthens the exchange capability of heat between heat-conducting medium by increase surface area.
4. the cooling structure of the inner rotor motor according to claim 1 or 3, is characterized in that, the second end of described heat conductive rod comprises the bulge-structure on chassis and chassis, and described bulge-structure contacts with the coolant in the 3rd cavity.
5. the cooling structure of inner rotor motor according to claim 1, is characterized in that, described movable sealing mode is any one in packing seal, contact sealing, non-contacting seal, sealing ring, disc, sealing thread;
Described static seal mode is any one in the sealing of ring flange attachment spacers, the sealing of O shape ring, rubber sealing, packing seal.
6. the cooling structure of inner rotor motor according to claim 1, is characterized in that, described heat-conducting medium is nonconducting conduction oil.
7. the cooling structure of inner rotor motor according to claim 1, is characterized in that, described capping and front end housing or two isolating constructions, or the structure that integrated.
8. a cooling structure for inner rotor motor, described inner rotor motor comprises armature spindle, rotor portions, stator department, front end housing and capping; It is characterized in that, described cooling structure comprises the 3rd cavity between front end housing and capping, and the 3rd cavity is a part for coolant guiding channel;
Be provided with thermal conductive cavity in 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 static seal mode to seal;
Movable sealing mode is adopted to seal between described armature spindle and heat conductive rod;
Have a cavity in described heat conductive rod, its opening communicates with the 3rd cavity;
Cavity in described heat conductive rod is also as a part for coolant guiding channel;
The heat of rotor portions and armature spindle passes to heat conductive rod by the heat-conducting medium in thermal conductive cavity, and via the coolant heat radiation in the cavity in heat conductive rod.
9. the cooling structure of inner rotor motor according to claim 8, it is characterized in that, a diaphragm is also set in the cavity in described heat conductive rod, the cavity in described heat conductive rod is divided into and makes coolant flow through the 4th the longest cavity of path and the 5th cavity.
10. the cooling structure of inner rotor motor according to claim 9, is characterized in that, described cooling structure also includes the coolant jacket being enclosed in and contacting outside stator department and with stator department, and its inside has the first cavity; Also have the second cavity in described front end housing, this second cavity connects the first cavity and the 3rd cavity; First cavity, the second cavity, the 3rd cavity, the 4th cavity and the 5th cavity constitute complete coolant guiding channel, and stator, rotor share the heat radiation of this coolant guiding channel.
The cooling structure of 11. inner rotor motors according to claim 8, is characterized in that, the surface that described heat conductive rod is positioned at one end of thermal conductive cavity has projection or guiding gutter, strengthens the exchange capability of heat between heat-conducting medium by increase surface area.
The cooling structure of 12. inner rotor motors according to claim 8, is characterized in that, described movable sealing mode is any one in packing seal, contact sealing, non-contacting seal, sealing ring, disc, sealing thread;
Described static seal mode is any one in the sealing of ring flange attachment spacers, the sealing of O shape ring, rubber sealing, packing seal.
The cooling structure of 13. inner rotor motors according to claim 8, is characterized in that, described heat-conducting medium is nonconducting conduction oil.
The cooling structure of 14. inner rotor motors according to claim 8, is characterized in that, described capping and front end housing or two isolating constructions, or the structure that integrated.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| 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 |
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| CN201210270467.9A CN102810943B (en) | 2012-07-31 | 2012-07-31 | The cooling structure of inner rotor motor |
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| CN102810943B true CN102810943B (en) | 2016-04-27 |
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| CN102810943B (en) * | 2012-07-31 | 2016-04-27 | 联合汽车电子有限公司 | The cooling structure of inner rotor motor |
| CN104167873B (en) * | 2014-07-09 | 2016-08-24 | 雷神机电科技(宁波)有限公司 | A kind of motor coldplate |
| CN104242555A (en) * | 2014-10-14 | 2014-12-24 | 成都育芽科技有限公司 | Heat radiation cover plate |
| CN104963753B (en) * | 2015-06-30 | 2018-09-14 | 宁波普泽机电有限公司 | A kind of starter air cooling equipment |
| JP2018528748A (en) * | 2015-08-19 | 2018-09-27 | ティーエム４・インコーポレーテッド | Casting refrigerator for electric machine |
| CN106685143A (en) * | 2015-11-10 | 2017-05-17 | 大陆汽车投资（上海）有限公司 | Cooling flow channel of electric vehicle motor |
| CN105422485A (en) * | 2015-12-09 | 2016-03-23 | 南京磁谷科技有限公司 | Cooling structure of rotor of air blower |
| CN106130258A (en) * | 2016-07-27 | 2016-11-16 | 江苏东方康弛机电科技有限公司 | Water-cooled generator with coolant jacket |
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| CN107231049B (en) * | 2017-06-20 | 2023-07-07 | 上海蔚来汽车有限公司 | Liquid cooling structure of motor rotor |
| CN109904951A (en) * | 2017-12-11 | 2019-06-18 | 北京金风科创风电设备有限公司 | Ultra-high-speed permanent magnet disc type motor and mounting method thereof |
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| CN109459695A (en) * | 2018-12-04 | 2019-03-12 | 宁波菲仕电机技术有限公司 | A kind of machine with natural cooling mechanism for testing |
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| CN112542920B (en) * | 2021-01-08 | 2021-07-09 | 南京凯泉电机制造有限公司 | Motor for preventing coil overload and ensuring normal operation |
| CN112930091B (en) * | 2021-02-09 | 2022-05-31 | 联想(北京)有限公司 | Heat radiation structure and electronic equipment |
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| CN2742662Y (en) * | 2004-11-12 | 2005-11-23 | 西北工业大学 | Motor rotor shaft with screw cooling oil path |
| CN2757414Y (en) * | 2004-11-12 | 2006-02-08 | 西北工业大学 | Motor stator and rotor double path parallel circulation oil path cooling device |
| CN102055279A (en) * | 2009-11-09 | 2011-05-11 | 发那科株式会社 | Induction motor equipped with heat dissipating disc for dissipating rotor heat |
| CN202818002U (en) * | 2012-07-31 | 2013-03-20 | 联合汽车电子有限公司 | Cooling structure of internal-rotor motor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014019322A1 (en) | 2014-02-06 |
| CN102810943A (en) | 2012-12-05 |
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