CN104242519A - Motor rotor cooling structure - Google Patents
Motor rotor cooling structure Download PDFInfo
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- CN104242519A CN104242519A CN201310580831.6A CN201310580831A CN104242519A CN 104242519 A CN104242519 A CN 104242519A CN 201310580831 A CN201310580831 A CN 201310580831A CN 104242519 A CN104242519 A CN 104242519A
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- heat pipe
- blind hole
- heat
- cooling structure
- rotor
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Abstract
The invention discloses a motor rotor cooling structure. The motor rotor cooling structure comprises a rotor and a heat conducting pipe, a seal is arranged at one end of the heat conducting pipe, the other end of the heat conducting pipe is open, the end, located in a motor casing, of a motor shaft on the rotor is provided with a coaxial blind hole, the open end of the heat conducting pipe is fixedly connected to the open end of the blind hole, the inner diameter of the heat conducting pipe gradually increases from the end with the seal to the open end, and a sintered layer is arranged on the inner wall of the blind hole of the motor shaft. According to the motor rotor cooling structure, the influence on the cooling efficiency of the heat conducting pipe caused by high-speed rotation of the rotor can be effectively avoided so that a motor can have a reliable cooling effect, and meanwhile the motor can be conveniently manufactured.
Description
Technical field
The present invention relates to technical field of motors, especially relate to a kind of rotor cooling structure.
Background technology
Motor operationally can produce heat, usually be all dispelled the heat by housing, or on rotor, blade is installed thus by the air intake housing of outside, and then reaches the object of cooling, but the above-mentioned type of cooling also exists the problem that cooling effectiveness is low and noise is large.Along with the progress of technology, people by arranging the heat pipe of the quick heat conduction of energy to realize the cooling of motor on motor.Such as, a kind of disclosed in Chinese patent literature " motor with the cooling of the heat pipe type of cooling ", publication No. is CN102751803A, directly by the motor feels hot, heat that source sends passes cooling motor to this motor heat pipe, comprise stator, rotor, armature winding and two overlaps independently heat pipe cooling emendation, can independently use, also use capable of being combined.This type of cooling can solve current conventional motors development restriction, the object reaching designs simplification He reduce costs.The essential structure of heat pipe comprises the body of a vacuum, working media is provided with in body, the tube wall of heat pipe is provided with capillary structure, one end of heat pipe is heat absorbing end, the other end is radiating end, and when the heat absorbing end of heat pipe contacts with thermal source, the heat of thermal source makes the working media in body become gas and flows to radiating end, after radiating end sheds heat, become liquid, then automatically flow back into heat absorbing end by the effect of capillary structure.Such as, a kind of in Chinese patent literature disclosed " heat pipe structure of the smooth zero draft of end face ", notification number is CN2585162Y, wherein top cover and bottom are arranged at upper end and the bottom of hollow cylinder respectively, and the upper surface of this top cover is formed with recess, and is formed with perforation in recess, filling tube is arranged in the perforation of top cover, this bottom lower surface is plane, and has capillary structure to be attached at the inner edge wall of hollow cylinder, and flexible supporter is placed in the side of capillary structure.Although heat pipe has the fast feature of heat conduction velocity, but there are the following problems to use it for the cooling of rotor: due to motor operationally rotor be in high speed rotating state, therefore, being arranged on epitrochanterian heat pipe also can synchronously high speed rotating, the working media now becoming liquid in heat pipe after heat radiation can be subject to the effect of a great centrifugal force thus be attached on the inwall of heat pipe, capillary structure widely in reduction heat pipe is to the guide function of working media, make the working media of radiating end cannot get back to heat absorbing end rapidly, thus reduce the heat conduction efficiency of heat pipe and the cooling effect of rotor widely.
Summary of the invention
The present invention cannot get back to heat absorbing end rapidly in order to the working media solved with existing during heat pipe cooling motor rotor, the problem of the cooling effect difference of rotor, a kind of cooling structure adopting the rotor of heat pipe is provided, effectively can avoids the impact of rotor high-speed rotation on heat pipe cooling effectiveness.
To achieve these goals, the present invention is by the following technical solutions: a kind of rotor cooling structure, comprise rotor and heat pipe, described heat pipe one end is provided with sealing, the other end is open-minded, one end that epitrochanterian motor shaft is positioned at electric machine casing is provided with coaxial blind hole, and one end that heat pipe is opened is fixed in the openend of blind hole, and the internal diameter of described heat pipe progressively increases from sealing one end to opening one end.
In the prior art, heat pipe is directly plugged in a heat pipe installing blind of the workpiece needing cooling, be subject to the restriction of installing blind machining accuracy, be difficult between heat pipe and installing blind fit tightly well, thus affect the heat transfer efficiency of heat pipe.The present invention directly arranges blind hole on motor shaft, and heat pipe then one end is open-minded, and the one end of being opened by heat pipe is fixed in the openend of blind hole, and like this, namely the blind hole of motor shaft becomes the extension of heat pipe, thus the heat pipe that formation one is spliced.Because blind hole is without the need to coordinating with heat pipe, therefore greatly can reduces the requirement on machining accuracy to blind hole, thus being conducive to its processing and manufacturing.And the heat of motor shaft can directly make the liquid working media of blind hole inwall evaporate, and can improve heat conduction efficiency and cooling effect significantly.Particularly, existing heat pipe is cylindrical tube, and the working media thus when rotor high-speed rotates in heat pipe is easily attached on heat pipe inwall by the effect of centrifugal force consumingly, and then the working media reducing radiating end is back to the speed of heat absorbing end.Heat pipe internal diameter of the present invention progressively increases from sealing one end to opening one end, that is, the inwall of heat pipe is outward-dipping to opening one end from sealing one end, like this, the reaction force of the inwall that working media liquid on the inwall being adsorbed on inclination can be tilted, this reaction force can form the component towards motor shaft blind hole one end, thus the medium that pushes the work forward refluxes towards blind hole one end.And the rotating speed of rotor is higher, centrifugal force is larger, correspondingly the reaction force of inwall is also larger, the component of this reaction force in blind hole one end is also larger like this, thus effectively drive the backflow of working media, the problem that the cooling effectiveness efficiently solving rotor heat pipe when high speed rotating reduces, and then improve the cooling effect of rotor.
As preferably, the openend of described blind hole is provided with counterbore, and heat pipe is fixed in counterbore, and the end face that the internal diameter of blind hole is opened by heat pipe progressively increases to blind hole bottom surface, thus is connected with the inwall of heat pipe is smooth.Like this, liquid working media can successfully flow to blind hole inwall from heat pipe inwall.
As preferably, the blind hole inwall of described motor shaft is provided with sinter layer, sinter layer realizes by sintering process, because sinter layer inside can form the tiny holes evenly gathered, thus it has good capillarity, like this, be back to the working media in blind hole by heat pipe can be adsorbed on quickly and evenly on the inwall of whole blind hole under the capillarity of sinter layer, thus avoid " dry combustion method " phenomenon that blind hole inwall local is formed without working media absorption, and then effectively can improve heat absorption efficiency.Particularly, the sinter layer sintered on inwall has to be convenient to install manufacture and the high non-damageable advantage of intensity.
As preferably, the inwall of described motor shaft blind hole is provided with some heat absorption circles arranged vertically, described heat absorption circle comprise the circle body that is connected with blind hole inwall and by circle body to away from the axially extended some elasticity slips in heat pipe side, the inwall of described blind hole and heat absorption are enclosed surface and are provided with sinter layer.
The heat of motor shaft can be transmitted on heat absorption circle, and the inwall due to blind hole encloses surface with heat absorption and has sinter layer simultaneously, thus jointly can adsorb working media and working media is evaporated, thus improving the heat absorption efficiency of heat absorbing end significantly.The particularly ringwise comb shape of heat absorption circle, when rotor high-speed rotates, the elasticity slip of heat absorption circle outwards struts under the influence of centrifugal force and is close to the inwall of blind hole, that is elasticity slip keeps identical angle of inclination with blind hole inwall, thus can guarantee the working media energy quick backflow on heat absorption circle when rotor high-speed rotates.
As preferably, described elasticity slip circumferentially equidistantly arranging at circle body, the elasticity slip of adjacent two heat absorption circles misplaces layouts in a circumferential direction, thus the elasticity slip enclosed because adjacent heat absorption can be avoided mutually to stack together and affect the evaporation rate of working media.
As preferably, be provided with at the outer surface of heat pipe the radiating fin that some radial directions extend vertically, thus the radiating effect of heat pipe can be improved, particularly, air resistance coefficient when the radial radiating fin extended can be reduced in high speed rotating greatly and noise.
As preferably, described radiating fin comprises the heat dissipating ring affixed with heat pipe, and the outward flange of heat dissipating ring is provided with stepped tooth.
Because the temperature of radiating fin progressively reduces from centre to edge, and stepped tooth structure can make the area of dissipation of radiating fin correspondingly progressively reduce from centre to edge, like this, the weight of radiating fin can be reduced significantly while guaranteeing radiating fin radiating efficiency, both reduced material cost, and be conducive to again making motor lightweight.
As preferably, be provided with radiator fan in the junction of heat pipe and motor shaft, described radiator fan comprises the fastening hoop being set in heat pipe and motor shaft junction and the fan blade be arranged on equably on adapter sleeve periphery.Radiator fan is conducive to the heat radiation of heat pipe on the one hand, is conducive to the bonding strength improving heat pipe and motor shaft simultaneously.
Therefore, the present invention has following beneficial effect: effectively can avoid the impact of rotor high-speed rotation on heat pipe cooling effectiveness, make motor have reliable cooling effect, facilitate its processing and manufacturing simultaneously.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is the partial sectional view of motor shaft.
Fig. 3 is the structural representation of heat absorption circle.
Fig. 4 is the structural representation of radiating fin.
In figure: 1, rotor 11, motor shaft 12, blind hole 13, counterbore 2, heat pipe 23, sinter layer 24, sealing 3, heat absorption circle 31, circle body 32, elasticity slip 6, radiating fin 61, heat dissipating ring 62, stepped tooth 63, stripper loop 7, radiator fan 71, fastening hoop 72, fan blade
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described.
As shown in Figure 1, a kind of rotor cooling structure, for the cooling to rotor, comprise rotor 1, heat pipe 2, rotor arranges coaxial blind hole 12 for the motor shaft 11 of output torque in the one end being positioned at electric machine casing, one end of heat pipe arranges the sealing 24 for encapsulating, and the other end is then open-minded, and one end that heat pipe is opened is fixed on the openend of blind hole.Such motor shaft becomes the extension of heat pipe, thus the heat pipe that formation one is spliced, certainly, be understandable that, be secured to after on motor shaft by heat pipe, we need in heat pipe, pour into corresponding working media, are then sealed by heat pipe with sealing.Because heat pipe has very high heat transfer rate, therefore the heat that rotor operationally produces can be distributed by heat pipe.Successfully heat absorbing end can be back to from radiating end in order to make the working media of rotor when high speed rotating in heat pipe, the internal diameter of heat pipe progressively increases from sealing one end to opening one end, that is, the inwall of heat pipe is outward-dipping to opening one end from sealing one end, like this, when machine operation, the reaction force of the inwall that working media liquid on the inwall being adsorbed on inclination can be tilted, the centrifugal force that this reaction force and working media are subject to can form making a concerted effort towards motor shaft blind hole, thus the inwall that the medium that pushes the work forward tilts along heat pipe refluxes towards blind hole.And the rotating speed of rotor is higher, centrifugal force is larger, correspondingly the reaction force of inwall is also larger, push the work forward medium also larger with joint efforts like this, thus effectively can drive the backflow of working media, the problem that the cooling effectiveness solving rotor heat pipe when high speed rotating reduces, and then improve the cooling effect of rotor.
Affixed for the ease of heat pipe and blind hole, we can arrange a counterbore 13 at the openend of blind hole, heat pipe open one end by be threaded or the mode such as welding is fixed in counterbore, thus limit the degree of depth that heat pipe embeds blind hole.Certainly, need to guarantee to seal in the junction of heat pipe and counterbore, in case the leakage of working media in heat pipe.As a kind of preferred version, the end face that the internal diameter of blind hole is opened by heat pipe progressively increases to blind hole bottom surface, thus is connected with the inwall of heat pipe is smooth.Like this, liquid working media can successfully flow to blind hole inwall from heat pipe inwall.
In addition, we also can sinter the sinter layer 23 of one deck anaerobic copper powder on the blind hole inwall of motor shaft, the tiny holes evenly gathered that sinter layer inside is formed has good capillarity, like this, be back to the working media in blind hole by heat pipe can be adsorbed on equably on the inwall of whole blind hole under the capillarity of sinter layer, thus the heat of motor shaft is passed to the working media in blind hole rapidly and working media is evaporated rapidly, and then effectively can improve heat absorption efficiency.
In order to strengthen the efficiency of working media heat absorption evaporation further, as shown in Figure 2, we also first can arrange some heat absorption circles 3 arranged vertically on the blind hole inwall of motor shaft.The overall ringwise comb shape of heat absorption circle, concrete structure as shown in Figure 3, it comprise the circle body 31 that is connected with blind hole inwall and by circle body to away from the axially extended some elasticity slips 32 in heat pipe side, after heat absorption circle is fixed to blind hole inwall, sinter the sinter layer of one deck anaerobic copper powder at blind hole inwall and heat absorption circle surface.Like this, the heat of motor shaft can be transmitted on heat absorption circle simultaneously, thus working media can be evaporated with heat absorption circle by the inwall of blind hole simultaneously, and then improves the heat absorption efficiency of working media significantly.It should be noted that, heat absorption circle can adopt stainless steel or other has good heat conductive performance and flexible material is made, and thickness can be controlled between 0.01 millimeter-0.02 millimeter, like this, heat absorption circle had both had good heat-conductive characteristic, there is good elasticity simultaneously, when rotor high-speed rotates, the elasticity slip of heat absorption circle naturally outwards struts under the influence of centrifugal force and is close to the inwall of blind hole, that is elasticity slip keeps identical angle of inclination with blind hole inwall, thus can guarantee the working media energy quick backflow on heat absorption circle when rotor high-speed rotates.
Further, heat absorption circle axially can arrange by front and back overlap joint in blind hole, thus more heat absorption circle can be arranged, certainly, now elasticity slip preferably should circumferentially equidistantly arranging at circle body, the layout and the elasticity slip of adjacent in the axial direction two heat absorption circles misplaces in a circumferential direction, thus the elasticity slip because of adjacent heat absorption circle can be avoided mutually to stack together and affect the evaporation rate of working media.
Finally, we also can arrange the radiating fin 6 of some radial direction extensions in compartment of terrain at the outer surface of heat pipe vertically.As shown in Figure 4, radiating fin comprises the heat dissipating ring 61 affixed with radiating end, arranges stepped tooth 62 at the outward flange of heat dissipating ring simultaneously.Because radiating fin is positioned at the plane perpendicular to heat pipe axis, thus radiating fin can not form impetus to air when high speed rotating, thus air resistance coefficient when greatly can be reduced in high speed rotating and noise, the air of radiating fin two sides then forms relative high velocity air, can improve the radiating effect of radiating fin.In addition, stripper loop 63 can be set between radiating fin, both accurately can locate the spacing between radiating fin, be conducive to again radiating fin and be reliably fixed on heat pipe, and increase the heat transfer area between heat pipe and radiating fin, improve radiating effect.Stepped tooth then can reduce the weight of radiating fin significantly under the prerequisite not reducing radiating effect, saves material, and moment of inertia when reducing rotor turns.Certainly, as shown in Figure 1, we also can arrange a radiator fan 7 in the junction of heat pipe and motor shaft, the fastening hoop 71 that radiator fan comprises the junction being set in heat pipe and motor shaft and the fan blade 72 be arranged on equably on fastening hoop periphery, radiator fan can use aluminium alloy casting.Like this, radiator fan is conducive to the heat radiation of heat pipe on the one hand, is conducive to the bonding strength improving heat pipe and motor shaft simultaneously.Certainly, for the ease of the installation of radiator fan, motor shaft is connected one end lateral surface and heat pipe and opens one end lateral surface and all can arrange a step reduced with heat pipe, thus form an annular groove in the junction of heat pipe and motor shaft, the fastening hoop of radiator fan then just screens in this annular groove.It should be noted that, fastening hoop should be double splicing construction, and like this, radiator fan first can be split up into two halves, is then fastened on annular groove, by connected modes such as screws, fastening hoop is connected as one, thus forms complete radiator fan.
Claims (8)
1. a rotor cooling structure, comprise rotor and heat pipe, it is characterized in that, described heat pipe one end is provided with sealing, the other end is open-minded, one end that epitrochanterian motor shaft is positioned at electric machine casing is provided with coaxial blind hole, and one end that heat pipe is opened is fixed in the openend of blind hole, and the internal diameter of described heat pipe progressively increases from sealing one end to opening one end.
2. a kind of rotor cooling structure according to claim 1, it is characterized in that, the openend of described blind hole is provided with counterbore, and heat pipe is fixed in counterbore, the end face that the internal diameter of blind hole is opened by heat pipe progressively increases to blind hole bottom surface, thus is connected with the inwall of heat pipe is smooth.
3. a kind of rotor cooling structure according to claim 1, is characterized in that, the blind hole inwall of described motor shaft is provided with sinter layer.
4. a kind of rotor cooling structure according to claim 1, it is characterized in that, the inwall of described motor shaft blind hole is provided with some heat absorption circles arranged vertically, described heat absorption circle comprise the circle body that is connected with blind hole inwall and by circle body to away from the axially extended some elasticity slips in heat pipe side, the inwall of described blind hole and heat absorption are enclosed surface and are provided with sinter layer.
5. a kind of rotor cooling structure according to claim 4, is characterized in that, described elasticity slip circumferentially equidistantly arranging at circle body, and the elasticity slip of adjacent two heat absorption circles misplaces layout in a circumferential direction.
6. a kind of rotor cooling structure according to claim 1 or 2 or 3 or 4 or 5, is characterized in that, is provided with the radiating fin of some radial direction extensions at the outer surface of heat pipe vertically.
7. a kind of rotor cooling structure according to claim 6, it is characterized in that, described radiating fin comprises the heat dissipating ring affixed with heat pipe, and the outward flange of heat dissipating ring is provided with stepped tooth.
8. a kind of rotor cooling structure according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that, be provided with radiator fan in the junction of heat pipe and motor shaft, described radiator fan comprises the fastening hoop being set in heat pipe and motor shaft junction and the fan blade be arranged on equably on adapter sleeve periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310580831.6A CN104242519B (en) | 2013-06-18 | 2013-11-18 | Motor rotor cooling structure |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320378625 | 2013-06-18 | ||
| CN2013203786252 | 2013-06-18 | ||
| CN201320378625.2 | 2013-06-18 | ||
| CN201310580831.6A CN104242519B (en) | 2013-06-18 | 2013-11-18 | Motor rotor cooling structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104242519A true CN104242519A (en) | 2014-12-24 |
| CN104242519B CN104242519B (en) | 2017-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310580831.6A Active CN104242519B (en) | 2013-06-18 | 2013-11-18 | Motor rotor cooling structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI572125B (en) * | 2015-09-23 | 2017-02-21 | Rotor heat dissipation structure of inner rotor motor | |
| CN109327091A (en) * | 2017-08-01 | 2019-02-12 | 奥迪股份公司 | rotors for motors |
| CN118008755A (en) * | 2024-02-19 | 2024-05-10 | 蚌埠高科能源装备有限公司 | A surface cooler for compressor |
| CN118487398A (en) * | 2024-05-23 | 2024-08-13 | 郑州德盛祥电机制造有限公司 | High-speed permanent magnet motor |
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| JPS57138841A (en) * | 1981-02-18 | 1982-08-27 | Hitachi Ltd | Rotary electric machine |
| EP0152785A1 (en) * | 1984-02-15 | 1985-08-28 | Kernforschungszentrum Karlsruhe Gmbh | Rotating machine with heat pipe cooling |
| SE528580C2 (en) * | 2005-05-25 | 2006-12-19 | Abb Ab | Rotating electrical machine incorporates a motor shaft which contains a heat tube and applies to both low and high voltage machines |
| CN202435199U (en) * | 2011-12-31 | 2012-09-12 | 大连熵立得传热技术有限公司 | Heat pipe module heat-dissipation type oil-bath electric motor |
| CN203596678U (en) * | 2013-11-18 | 2014-05-14 | 於贻鹏 | Motor rotor cooling structure |
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2013
- 2013-11-18 CN CN201310580831.6A patent/CN104242519B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57138841A (en) * | 1981-02-18 | 1982-08-27 | Hitachi Ltd | Rotary electric machine |
| EP0152785A1 (en) * | 1984-02-15 | 1985-08-28 | Kernforschungszentrum Karlsruhe Gmbh | Rotating machine with heat pipe cooling |
| SE528580C2 (en) * | 2005-05-25 | 2006-12-19 | Abb Ab | Rotating electrical machine incorporates a motor shaft which contains a heat tube and applies to both low and high voltage machines |
| CN202435199U (en) * | 2011-12-31 | 2012-09-12 | 大连熵立得传热技术有限公司 | Heat pipe module heat-dissipation type oil-bath electric motor |
| CN203596678U (en) * | 2013-11-18 | 2014-05-14 | 於贻鹏 | Motor rotor cooling structure |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI572125B (en) * | 2015-09-23 | 2017-02-21 | Rotor heat dissipation structure of inner rotor motor | |
| CN109327091A (en) * | 2017-08-01 | 2019-02-12 | 奥迪股份公司 | rotors for motors |
| CN109327091B (en) * | 2017-08-01 | 2021-01-29 | 奥迪股份公司 | Rotor for an electric machine |
| US11043865B2 (en) | 2017-08-01 | 2021-06-22 | Audi Ag | Rotor for an electric machine |
| CN118008755A (en) * | 2024-02-19 | 2024-05-10 | 蚌埠高科能源装备有限公司 | A surface cooler for compressor |
| CN118008755B (en) * | 2024-02-19 | 2024-09-06 | 蚌埠高科能源装备有限公司 | Surface cooler for compressor |
| CN118487398A (en) * | 2024-05-23 | 2024-08-13 | 郑州德盛祥电机制造有限公司 | High-speed permanent magnet motor |
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