CN108336865B - Liquid cooling driving motor - Google Patents
Liquid cooling driving motor Download PDFInfo
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- CN108336865B CN108336865B CN201810286752.7A CN201810286752A CN108336865B CN 108336865 B CN108336865 B CN 108336865B CN 201810286752 A CN201810286752 A CN 201810286752A CN 108336865 B CN108336865 B CN 108336865B
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- 239000007788 liquid Substances 0.000 title claims abstract description 414
- 238000001816 cooling Methods 0.000 title claims abstract description 109
- 238000004804 winding Methods 0.000 claims abstract description 69
- 238000005507 spraying Methods 0.000 claims description 68
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 10
- 238000002955 isolation Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 22
- 239000000110 cooling liquid Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 12
- 239000012530 fluid Substances 0.000 description 8
- 230000005389 magnetism Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000007885 magnetic separation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010724 circulating oil Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The utility model relates to a liquid cooling driving motor, comprising: the motor comprises a motor shell, a stator core, a stator winding, a rotating shaft, a rotor core and a stator core liquid sleeve in a shuttle-core shape; the peripheries of the two end surfaces of the stator core liquid sleeve are fixedly connected to the inner wall of the motor shell; the inner wall of the stator core liquid sleeve is fixedly connected with the stator core, and a stator core liquid sleeve cooling cavity is formed between the stator core liquid sleeve and the motor shell; the upper part of the motor shell is provided with a liquid inlet communicated with the stator core liquid sleeve cooling cavity, and the lower part of the motor shell is provided with at least one liquid outlet; at least one liquid sleeve liquid outlet is arranged on the stator core liquid sleeve; the stator core liquid sleeve cooling cavity is communicated with at least one liquid outlet through at least one liquid sleeve liquid outlet. According to the liquid cooling driving motor, the liquid inlet is formed in the upper portion of the motor shell, so that liquid leakage is not easy to occur; the stator core liquid sleeve is arranged to form a stator core liquid sleeve cooling cavity, so that the motor shell and the stator core which generate heat can be effectively cooled, and the service life of the driving motor is prolonged.
Description
Technical Field
The utility model relates to the field of driving motors, in particular to a liquid cooling driving motor.
Background
According to the difference of cooling media of the cooling system of the electric driving motor, the cooling media can be divided into air cooling, liquid cooling and the like. Air cooling can be classified into natural air cooling and forced air cooling. Liquid cooling can be classified into water cooling and oil cooling. With the increase of the power density of the driving motor of the electric vehicle, the heating value is larger, and the simple and low-cost air-cooled motor is difficult to meet the requirements, so that the driving motor of the electric vehicle adopts a liquid cooling mode.
In 1995, conping, mu Dayu et al conducted comparative studies on three water-cooled motors of different structures, and obtained that the cooling effect of the water-cooled structure of the shell water-cooled and end cover water-cooled and shaft water-cooled structure was best, but the difficulty in the process was great. In 1997, U.S. Carlo C Di Pietro et al adopted a method of combining an injection oil way and a circulating oil way to cool the motor of the electric vehicle, thereby reducing the temperature rise of the permanent magnet of the motor rotor and the winding end part and greatly improving the motor performance. In 2001, german H.Neudorfer performs heat dissipation comparison analysis on motors with different cooling modes and structures to obtain the liquid cooling motor which has the advantages of pollution prevention, dust prevention and the like. In 2004 Huang Surong et al, an axial water-cooling circuit for a motor stator base is proposed, which has high cooling efficiency and simple process. The temperature rise research of the indirect shell oil-cooled motor is carried out by Athens K.I. Laskaris et al in 2012, and the cooling effect is good. Three cooling schemes combining air cooling and water cooling are provided for a 1.12Mw high-speed permanent magnet motor by Shenyang industrial and chemical industry, large Zhang Fengge, 2014, and the comparison of temperature fields and analysis of temperature fields prove that how to reduce the temperature rise of a rotor for the high-speed motor is an important point of cooling system design. In 2015, a system Ha Gelun s discloses a liquid-cooled motor utility model for supplying a cooling liquid to a rotor having a cooling flange structure and for supplying the cooling liquid to a stator by rotation of the rotor, in order to effectively cool the motor and improve the performance. The utility model discloses a liquid cooling Motor based on the combined action of pressure and gravity, which is characterized in that oil is enabled to be in oil separation contact with expected components under the action of gravity through the design of an oil disc shape and a drainage sheet, the blocking of an oil injection port or the insufficient pressure is avoided independently of the size and the number of the oil injection port, and the defect that the cooling effect of the lower part of the Motor cannot be ensured due to gravity dispersion, the lower part of the Motor is possibly overheated, and higher requirements are put forward on the thermal stability of a stator and a rotor material of the Motor. The utility model discloses an oil-cooled motor, which is disclosed by the power control technology limited company of Shanghai Dashi county in 2016, and is characterized in that motor coils and iron cores are sprayed, so that the defect of a water-cooled motor is overcome, and the power density is improved. The same year Fu An Shi wide source electromechanical limited company discloses an internal circulation oil cooling motor, which is characterized in that direct cooling is performed on the periphery of a stator, spraying cooling is performed on the winding end part, immersing cooling (with adjustable liquid level) is performed on a rotor part, and cooling is performed in the stator Zhou Feijian, so that efficient heat dissipation is achieved, the defect that bubbles are easily generated when the rotor part is immersed in oil, heat resistance is increased, heat exchange is damaged, the cooling effect of the inner periphery of the stator is unreliable due to the existence of air gap wind pressure, and higher requirements are also provided for the thermal stability of stator and rotor materials of the motor. The utility model discloses a liquid cooling motor by utilizing a dynamic seal provided with an oil sprayer capable of moving relative to a stator winding, and aims to avoid coil erosion caused by fixed-point oil spraying cooling and adverse effects of an oil-air mixture after spray cooling on the performance of an oil pump. The company LASILA, viktor discloses a liquid cooling motor utility model in the same year, and the oil sprayer can move relative to the stator coil by eccentrically arranging a nozzle and the like, so as to avoid corrosion damage to the motor and local overheating. The utility model discloses an oil-cooled motor in 2017, UBILIS automobile Inc. Zhang Shixiang, and is characterized in that a plurality of through grooves containing guide bars are circumferentially distributed on a rotor core, part of oil in an oil passage of a stator housing enters the guide bar to cool a rotor, and part of oil is sprayed out from an oil spraying hole facing the stator winding to cool the stator winding, and the disadvantage is that wind pressure exists in the guide bars, so that cooling oil is difficult to enter. The company Zhang Jingcai discloses a motor liquid cooling system utility model in the same year, and aims to solve the problems that more parts and longer runners are needed for connecting a shell and a rotating shaft cooling channel by an external cooling tube, and the motor structure is complex. He Shuanggui, fu Bing et al in the same year disclose a driving motor cooling oil duct structure, and through setting up the corresponding multiple spot orifice of orientation stator and rotor at the auxiliary oil duct, solve because the casing structure restriction can only set up 1, 2 oil injection points and carry out the problem of local cooling. Therefore, the driving motor still needs to be improved in cooling, and the problems of incomplete cooling, unsatisfactory effect and the like still exist.
Disclosure of Invention
In view of the above, the present utility model provides a liquid-cooled drive motor that can be used as a drive motor for vehicles such as high-performance electric, hybrid cars, utility vehicles, and the like. The problems of incomplete cooling, unsatisfactory effect, dynamic unbalance caused by liquid flowing in the rotating shaft, unreliable dynamic sealing and the like of the existing driving motor are mainly solved.
To achieve the above object, a liquid-cooled driving motor includes: the motor comprises a motor shell, a stator core, a stator winding, a rotating shaft, a rotor core and a stator core liquid sleeve in a shuttle-core shape;
the peripheries of the two end surfaces of the stator core liquid sleeve are fixedly connected to the inner wall of the motor shell; the inner wall of the stator core liquid sleeve is fixedly connected with the stator core, and a stator core liquid sleeve cooling cavity is formed between the stator core liquid sleeve and the motor shell;
the upper part of the motor shell is provided with a liquid inlet communicated with the stator core liquid sleeve cooling cavity, and the lower part of the motor shell is provided with at least one liquid outlet;
at least one liquid sleeve liquid outlet is formed in the stator core liquid sleeve;
the stator core liquid sleeve cooling cavity is communicated with at least one liquid outlet through at least one liquid sleeve liquid outlet.
Further, the driving motor further includes: one or two stator winding coolers which are arranged between the stator core liquid sleeve and the stator winding along the axial direction and are in a ring shape, wherein the stator winding coolers are positioned on one side or two sides of the stator core along the axial direction;
the air gap between the stator core liquid sleeve and the stator winding forms two cooler cavities, and the two cooler cavities are respectively positioned at two sides of the stator core along the axial direction;
the stator winding cooler is fixedly connected with the stator core liquid sleeve and the stator core and sealed;
the liquid outlet of the liquid sleeve is communicated with the corresponding cooler cavity, and the cooler cavity is communicated with the corresponding liquid outlet.
Further, the stator winding cooler is provided with a plurality of diversion holes, and the size of the openings of the diversion holes is increased from top to bottom in sequence.
Further, at least one stator core liquid channel is arranged on the stator core;
the stator core liquid sleeve is provided with a stator core liquid channel liquid application port corresponding to the stator core liquid channel;
the stator core liquid sleeve cooling cavity is communicated with the stator core liquid channel through the stator core liquid channel liquid applying port;
the liquid outlet end of the stator core liquid channel is communicated with an air gap between the stator core and the rotor core; the air gap is communicated with the corresponding liquid outlet.
Further, the stator core is formed by pressing a plurality of silicon steel sheets, the section shape of the stator core liquid channel is rectangular, and the trend of the stator core liquid channel is parallel to the plane of the silicon steel sheets.
Further, a second liquid inlet positioned above the rear end part of the rotating shaft is also formed in the motor shell;
the rear end part of the rotating shaft is provided with a rotating shaft liquid supply chamber, and a rotating shaft cooling cavity is arranged in the rotating shaft; the second liquid inlet is communicated with the rotating shaft cooling cavity through the rotating shaft liquid supply chamber; and one end of the rotating shaft, which is far away from the rotating shaft liquid supply chamber, is provided with a plurality of liquid channel liquid spraying ports.
Further, the driving motor further comprises a first magnetic isolation plate and a second magnetic isolation plate which are axially arranged on two side surfaces of the rotor core.
Further, a first axial spiral liquid channel and a second axial spiral liquid channel which are symmetrical in center are formed in the first magnetic isolation plate;
the plurality of liquid channel liquid spraying openings comprise a first liquid channel liquid spraying opening and a second liquid channel liquid spraying opening;
the first liquid channel liquid spraying opening and the second liquid channel liquid spraying opening are respectively communicated with the first axial spiral liquid channel and the second axial spiral liquid channel;
the first axial spiral liquid channel is provided with a first liquid spraying port, the second axial spiral liquid channel is provided with a second liquid spraying port, and the first liquid spraying port and the second liquid spraying port are both bent along the direction of the end part of the stator winding;
the first liquid spraying port and the second liquid spraying port are used for respectively throwing liquid to the inner circumferential surface of the stator winding and then discharging the liquid through the corresponding liquid outlets.
Further, a third axial spiral liquid channel 70 c) and a fourth axial spiral liquid channel which are symmetrical in center are formed in the second magnetic isolation plate;
the plurality of liquid channel liquid spraying ports further comprise a third liquid channel liquid spraying port and a fourth liquid channel liquid spraying port;
the third liquid channel liquid spraying opening and the fourth liquid channel liquid spraying opening are respectively communicated with the third axial spiral liquid channel and the fourth axial spiral liquid channel;
the third axial spiral liquid channel is provided with a third liquid spraying port, the fourth axial spiral liquid channel is provided with a fourth liquid spraying port, and the third liquid spraying port and the fourth liquid spraying port are both bent along the direction of the end part of the stator winding;
the third liquid spraying port and the fourth liquid spraying port are used for respectively throwing liquid to the inner circumferential surface of the stator winding and then discharging the liquid through the corresponding liquid outlets.
The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:
the liquid cooling driving motor provided by the embodiment of the utility model comprises: the motor comprises a motor shell, a stator core, a stator winding, a rotating shaft, a rotor core and a stator core liquid sleeve in a shuttle-core shape; the peripheries of the two end surfaces of the stator core liquid sleeve are fixedly connected to the inner wall of the motor shell; the inner wall of the stator core liquid sleeve is fixedly connected with the stator core, and a stator core liquid sleeve cooling cavity is formed between the stator core liquid sleeve and the motor shell; the upper part of the motor shell is provided with a liquid inlet communicated with the stator core liquid sleeve cooling cavity, and the lower part of the motor shell is provided with at least one liquid outlet; at least one liquid sleeve liquid outlet is formed in the stator core liquid sleeve; the stator core liquid sleeve cooling cavity is communicated with at least one liquid outlet through at least one liquid sleeve liquid outlet. In the scheme, the liquid cooling driving motor is not easy to leak liquid by arranging the liquid inlet at the upper part of the motor shell; the stator core liquid sleeve is arranged to form a stator core liquid sleeve cooling cavity, so that the motor shell and the stator core which generate heat can be effectively cooled, and the service life of the driving motor is prolonged.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the utility model is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic diagram of a cross-sectional structure of a liquid-cooled driving motor provided by the utility model;
FIG. 2 is a schematic cross-sectional view of FIG. 1 along the direction A-A;
FIG. 3 is a schematic diagram of a stator winding cooler according to the present utility model;
fig. 4 is a schematic diagram of a partial enlarged structure of a stator core according to the present utility model;
FIG. 5 is a schematic diagram of a cross-sectional structure of a magnetic shield of a driving motor according to the present utility model;
wherein: the liquid spraying device comprises a motor shell, a motor, a 10-liquid inlet, a 11-stator core liquid sleeve cooling cavity, a 12-liquid outlet, a 2-stator core liquid sleeve, a 20-liquid sleeve liquid outlet, a 21-stator core liquid channel liquid spraying port, a 3-stator core, a 30-stator core liquid channel, a 31-liquid outlet end, a 32-air gap, 33-silicon steel sheets, a 4-stator winding, a 40-stator winding cooler, a 41-cooler cavity, a 411-414 stator winding fixed cooler water guiding hole, a 415-418 stator winding fixed cooler liquid spraying port, a 5-rotating shaft, a 50-second liquid inlet, a 51-rotating shaft liquid supply chamber, a 52-rotating shaft cooling cavity, a 53 a-first liquid channel liquid spraying port, a 53 b-second liquid channel liquid spraying port, a 53 c-third liquid channel liquid spraying port, a 53 d-fourth liquid channel liquid spraying port, a 6-rotor core, a 7 a-first magnetic separation plate, 7 b-second magnetic separation plate, 70 a-first axial spiral liquid channel, 70 b-second axial spiral liquid channel 70-third liquid channel 70 b-third liquid channel 71d, third liquid channel 71-third liquid channel liquid spraying port, and fourth liquid spraying port 71-axial liquid spraying port 71-third liquid channel liquid spraying port.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The embodiment of the utility model provides a liquid cooling driving motor, which is described below with reference to the accompanying drawings.
The embodiment of the utility model relates to a liquid cooling driving motor for a vehicle, wherein used cooling liquid circularly flows in a cooling cavity and a channel in the motor to take away superfluous heat energy generated in the operation of the motor, so that the motor can operate at a normal operating temperature. For example, the paint can be composed of glycol, an anti-corrosion additive, an anti-foam additive and water, and can also be other cooling oil and the like. Referring to fig. 1-2, the motor 100 includes: the motor comprises a motor shell 1, a stator core 3, a stator winding 4, a rotating shaft 5, a rotor core 6 and a spindle-shaped stator core liquid sleeve 2;
wherein:
the peripheries of the two end faces of the stator core liquid sleeve 2 are fixedly connected to the inner wall of the motor shell 1; the inner wall of the stator core liquid sleeve 2 is fixedly connected with the stator core 3, and a stator core liquid sleeve cooling cavity 11 is formed between the stator core liquid sleeve 2 and the motor shell 1;
the upper part of the motor shell 1 is provided with a liquid inlet 10 communicated with a stator core liquid sleeve cooling cavity 11, and the lower part is provided with at least one liquid outlet 12; referring to fig. 1, two liquid outlets 12 may be provided on the motor housing near the left and right ends, and at least one liquid jacket liquid outlet 20 may be provided on the stator core liquid jacket 2; referring to fig. 1, there may be 2 liquid jacket liquid outlets 20, and the stator core liquid jacket cooling cavity 11 is communicated with the corresponding liquid outlet 12 through at least one liquid jacket liquid outlet 20, so as to effectively cool the motor housing 1 and the stator core 3 which generate heat.
In the embodiment, the upper part of the motor shell is provided with the liquid inlet, so that liquid leakage is not easy to occur; the stator core liquid sleeve is arranged to form a stator core liquid sleeve cooling cavity, so that the motor shell and the stator core which generate heat can be effectively cooled, and the service life of the driving motor is prolonged.
In one embodiment, for cooling the stator windings, one or two stator winding coolers 40 may be axially disposed between the stator core liquid jacket 2 and the stator windings 4, and two stator winding fixed coolers 40 are shown in fig. 1, and two stator winding fixed coolers 40 are shown in fig. 3, and are in a ring shape and are axially disposed on both sides of the stator core 3.
Referring to fig. 1, an air gap between a stator core liquid sleeve 2 and a stator winding 4 forms two cooler cavities 41, and the two cooler cavities 41 are respectively positioned at two sides of a stator core 3 along the axial direction; the two stator winding coolers 40 are fixedly connected and sealed with the stator core liquid sleeve 2 and the stator core 3 respectively; the liquid jacket liquid outlet 20 is communicated with the corresponding cooler cavity 41, and the cooler cavity 41 is communicated with the corresponding liquid outlet 12, so that the cooling of the stator winding is completed.
The stator winding fixed type cooler 40 may be provided with a plurality of guide holes, and the size of the holes of the plurality of guide holes increases from top to bottom. Referring to fig. 3, the stator winding cooler 40 is provided with flow guide holes 411 to 414 (the number and shape may be different) which are divided into inner, outer and middle 3 regions, that is: the circular holes are arranged in the middle area, the strip-shaped holes are distributed in the inner side area and the outer side area, the size of the holes is sequentially increased from top to bottom, so that the cooling liquid is guided to be uniformly dispersed and covered on the upper half outer circumferential surface of the stator winding 4 under the action of gravity, the upper half outer circumferential surface of the stator winding 4 is effectively cooled, when the liquid in the cooler cavity 41 is accumulated to a certain volume, the liquid overflows through liquid ports 415-418 (the size of the holes is sequentially reduced) of the facility of the cooler 40 of the stator winding, and the lower half outer circumferential surface of the stator winding is effectively cooled.
In one embodiment, at least one stator core fluid passage 30 may be radially provided on the stator core for further cooling of the stator core 3, and a suitable number of stator core fluid passages may be provided depending on the power or other usage parameters of the particular drive motor. The stator core liquid sleeve 2 is provided with stator core liquid channels liquid application ports 21 which are the same in number as and corresponding to the stator core liquid channels 30; referring to fig. 1, 3 stator core liquid passages and 3 stator core liquid passage liquid application ports 21 are provided.
The liquid outlet end 31 of the stator core liquid channel 30 is communicated with the air gap 32 between the stator core 3 and the rotor core 6, so that the cooling liquid in the stator core liquid jacket cooling cavity 11 can be led to the stator core liquid channel 30, and the air gap 32 can be communicated with the corresponding liquid outlet 11, thereby effectively taking heat away from the interior of the stator core.
In this embodiment, the liquid outlet end 31 of the stator core liquid channel 30 flows into the air gap 32 between the stator core 3 and the rotor core 6, under the combined action of the hydraulic pressure and the rotational centrifugal force of the rotor core 6, the cold fluid enters the air gap 32 to be heated, the hot fluid is pushed by the cold fluid in the air gap 32 to move towards the end of the rotor and then flows out of the air gap 32, and flows out of the corresponding liquid outlet 12, thereby completing the circulation, and further implementing effective cooling on the air gap position with the highest heat productivity of the motor, and greatly improving the cooling effect of the motor.
Further, referring to fig. 4, the stator core is formed by pressing a plurality of silicon steel sheets 33, the cross-section of the stator core liquid channel 30 is rectangular, and the direction of the stator core liquid channel 30 is parallel to the plane of the silicon steel sheets 33, i.e. radially arranged, and perpendicular to the rotating shaft 5. The rectangular section length of the stator core fluid channel 30 is an integer multiple of the thickness of the silicon steel sheet, for example, the thickness of the silicon steel sheet can be 10-20.
In one embodiment, referring to fig. 1, the motor housing 1 is further provided with a second liquid inlet 50 above the rear end of the rotating shaft 5; a rotary shaft liquid supply chamber 51 is arranged at the rear end part of the rotary shaft 5, and a rotary shaft cooling cavity 52 is arranged in the rotary shaft 5; the second liquid inlet 50 is communicated with a rotating shaft cooling cavity 52 through a rotating shaft liquid supply chamber 51; the rotor can be cooled effectively.
A plurality of liquid channel liquid spraying ports are arranged at one end of the rotating shaft 5 far away from the rotating shaft liquid supply chamber 51 and serve as liquid discharging ends of the rotating shaft cooling cavity 52, and flow out through corresponding liquid outlets 12 to finish circulating cooling.
In addition, in the present embodiment, since the cooling liquid in the rotary shaft 5 is supplied through the rotary shaft liquid supply chamber 51, a dynamic seal device is not required here, and reliability is increased.
In one embodiment, in the driving motor 100, in order to take the magnetism isolating measure, the first magnetism isolating plate 7a and the second magnetism isolating plate 7b are further disposed on two sides of the rotor core 6 along the axial direction, so that the magnetism isolating effect is better.
Referring to fig. 5, a first axial spiral liquid channel 70a and a second axial spiral liquid channel 70b are formed in the first magnetism isolating plate (7 a) and are symmetrical in center;
referring to fig. 1, wherein the plurality of liquid-path liquid-jet ports includes a first liquid-path liquid-jet port 53a and a second liquid-path liquid-jet port 53b;
the first liquid channel liquid spraying port 53a and the second liquid channel liquid spraying port 53b are respectively communicated with the first axial spiral liquid channel 70a and the second axial spiral liquid channel 70b;
the first axial spiral liquid passage 70a has a first liquid ejection port 71a, the second axial spiral liquid passage 70b has a second liquid ejection port 71b, and the first liquid ejection port 71a and the second liquid ejection port 71b are each provided so as to be curved in the direction of the end portion of the stator winding 4; the first liquid spraying port 71a and the second liquid spraying port 71b respectively throw the liquid to the inner circumferential surface of the stator winding 4 and then discharge the liquid through the corresponding liquid outlet 12, so that the cooling performance of the high-heat-generating-element stator winding 4 is further improved.
In this embodiment, the setting of axial spiral liquid way has both improved the cooling effect to the rotor, has effectively avoided dynamic unbalance problem again in comparison with radial liquid way setting in the past.
Further, in order to enhance the cooling performance of the high heat generation stator winding 4 and the rotor and further reduce the problem of dynamic unbalance on the basis of the above-described embodiment, the second magnetic shield 7b is provided in the same internal structure as the first magnetic shield 7 a.
As shown in fig. 5, the second magnetic shielding plate 7b is internally provided with a third axial spiral liquid channel 70c and a fourth axial spiral liquid channel 70d which are symmetrical in center;
referring to fig. 1, wherein the plurality of liquid-path liquid-jet ports further includes a third liquid-path liquid-jet port 53c and a fourth liquid-path liquid-jet port 53d;
the third liquid channel liquid spraying port 53c and the fourth liquid channel liquid spraying port 53d are respectively communicated with the third axial spiral liquid channel 70c and the fourth axial spiral liquid channel 70d;
the third axial spiral liquid passage 70c has a third liquid ejection port 71c, the fourth axial spiral liquid passage 70d has a fourth liquid ejection port 71d, and the third liquid ejection port 71c and the fourth liquid ejection port 71d are each provided so as to be curved in the direction of the end portion of the stator winding 4; the third liquid spraying port 71c and the fourth liquid spraying port 71d respectively throw the liquid to the inner circumferential surface of the stator winding 4 and then discharge the liquid through the corresponding liquid outlet 12, so that the cooling performance of the high-heat-generating-element stator winding 4 is further improved.
The overall principle of operation of the drive motor is described below by way of a complete example.
Referring to fig. 1, a motor housing 1 at the top of a driving motor 100 is provided with a liquid inlet 10, and two liquid outlets 12 are arranged below the bottom; the drive motor comprises a stator core liquid jacket cooling chamber 11, two cooler chambers 41, a shaft cooling chamber 52 and two stator winding coolers 40, and two magnetic shielding plates 7a, 7b with axially spiral liquid channels.
The cooling effect of the driving motor is comprehensive and good, and the problems of dynamic unbalance and unreliable dynamic sealing caused by the liquid flowing in the rotating shaft can be solved by describing the flow direction of the cooling liquid with reference to the figure 1.
And (3) a step of: the cooling liquid enters the stator core liquid sleeve cooling cavity 11 from the liquid inlet 10 to realize effective cooling of the motor shell 1 and the rotor.
The coolant discharge line of the stator core liquid jacket cooling cavity 11 is 2:
1. the cooling liquid in the stator core liquid jacket cooling cavity 11 enters the two stator winding coolers 40 and the two cooler cavities 41 through the two liquid jacket liquid outlets 20, so that the high-heat-generation stator winding 4 and part of the stator core 3 are further cooled effectively, the stator winding 4 is continuously cooled through 411-418 stator winding fixed cooler guide holes and liquid application holes, then gathered in the circumferential surface area between the two 418 liquid outlets which are symmetrically arranged, and then flows to the two liquid outlets 11 from the area.
2. The cooling liquid in the stator core liquid jacket cooling cavity 11 enters the air gap 32 between the rotor core 6 and the stator core 3 through the stator core liquid channel 30 arranged on the stator core 3, the hot fluid is pushed by the cold fluid in the air gap 32 to move towards the end part of the rotor and then flows out of the air gap 32, and flows out of the corresponding liquid outlet 12 to complete circulation, so that the air gap part with the highest heat productivity of the motor is effectively cooled.
And II: the cooling liquid enters the rotating shaft liquid supply chamber 51 from the second liquid inlet 50, flows to the rotating shaft cooling cavity 52, effectively cools the rotor, enters the spiral liquid channels 70a-d through the liquid channel liquid spraying ports 53a-d, and finally is thrown to the inner circumferential surface of the stator winding 4 from the liquid spraying ports 71a-d and then is discharged through the corresponding liquid outlet 12. Not only improves the cooling performance of the stator winding 4, but also effectively avoids the problem of dynamic unbalance.
The liquid cooling driving motor provided by the utility model can be used as a driving motor of vehicles such as high-performance electric, hybrid cars, utility vehicles and the like. The stator core liquid sleeve is connected (such as welded) with the motor shell, the stator core liquid sleeve is provided with a plurality of liquid application holes respectively towards two stator winding coolers, a plurality of (such as 3 or 4) stator core liquid channels parallel to the plane of the silicon steel sheet are arranged on the upper portion of the stator core, the stator core liquid sleeve is also provided with liquid application holes respectively towards the stator core liquid channels, the stator core liquid channels are provided with liquid application holes respectively towards the stator rotor air gaps, two end surfaces of the stator winding coolers are respectively fixed (such as bonded) with the stator liquid sleeve and the stator core, a plurality of diversion holes are circumferentially arranged on the upper portion of the stator winding coolers, a plurality of liquid outlets are circumferentially arranged on the lower portion of the stator winding coolers, a cavity is arranged on the rotating shaft, a rotating shaft liquid inlet is formed in the upper portion of the shell near the rotating shaft and is communicated with the rotating shaft liquid supply chamber, a plurality of radial liquid channels (such as 4) are communicated with the rotating shaft cavity and the magnetic separation plate liquid channels, and the two separation plates are respectively provided with 2 liquid guide holes and 2 liquid guide plates circumferentially arranged towards the stator winding liquid channels. The problems of incomplete cooling, unsatisfactory effect and the like of the existing driving motor are solved, the cooling part is comprehensive, and the cooling efficiency is high; compared with a driving motor for loading a cooling liquid path of the dynamic sealing device, the reliability is improved; the problem of dynamic unbalance is effectively avoided; thereby improving the service life of the driving motor,
it will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. A liquid-cooled drive motor, comprising: the motor comprises a motor shell (1), a stator iron core (3), a stator winding (4), a rotating shaft (5), a rotor iron core (6) and a spindle-shaped stator iron core liquid sleeve (2);
the peripheries of the two end surfaces of the stator core liquid sleeve (2) are fixedly connected to the inner wall of the motor shell (1); the inner wall of the stator core liquid sleeve (2) is fixedly connected with the stator core (3), and a stator core liquid sleeve cooling cavity (11) is formed between the stator core liquid sleeve (2) and the motor shell (1);
the upper part of the motor shell (1) is provided with a liquid inlet (10) communicated with the stator core liquid jacket cooling cavity (11), and the lower part is provided with at least one liquid outlet (12);
at least one liquid sleeve liquid outlet (20) is arranged on the stator core liquid sleeve (2);
the stator core liquid sleeve cooling cavity (11) is communicated with at least one liquid outlet (12) through at least one liquid sleeve liquid outlet (20);
one or two stator winding coolers (40) which are arranged between the stator core liquid sleeve (2) and the stator winding (4) along the axial direction and are in a ring shape, wherein the stator winding coolers (40) are positioned on one side or two sides of the stator core (3) along the axial direction;
the air gap between the stator core liquid sleeve (2) and the stator winding (4) forms two cooler cavities (41), and the two cooler cavities (41) are respectively positioned at two sides of the stator core (3) along the axial direction;
the stator winding cooler (40) is fixedly connected with the stator core liquid sleeve (2) and the stator core (3) and is sealed;
the liquid jacket liquid outlet (20) is communicated with the corresponding cooler cavity (41), and the cooler cavity (41) is communicated with the corresponding liquid outlet (12);
at least one stator core liquid channel (30) is arranged on the stator core (3);
a stator core liquid channel liquid application port (21) corresponding to the stator core liquid channel (30) is arranged on the stator core liquid sleeve (2);
the stator core liquid sleeve cooling cavity (11) is communicated with the stator core liquid channel (30) through the stator core liquid channel liquid application port (21);
the liquid outlet end (31) of the stator core liquid channel (30) is communicated with an air gap (32) between the stator core (3) and the rotor core (6); the air gap (32) is communicated with the corresponding liquid outlet (12);
the motor shell (1) is also provided with a second liquid inlet (50) positioned above the rear end part of the rotating shaft (5);
a rotating shaft liquid supply chamber (51) is arranged at the rear end part of the rotating shaft (5), and a rotating shaft cooling cavity (52) is arranged in the rotating shaft; the second liquid inlet (50) is communicated with the rotating shaft cooling cavity (52) through the rotating shaft liquid supply chamber (51); one end of the rotating shaft (5) far away from the rotating shaft liquid supply chamber (51) is provided with a plurality of liquid channel liquid spraying ports.
2. The liquid-cooled drive motor of claim 1, wherein a plurality of flow guide holes are provided in the stator winding cooler (40), and the size of the openings of the plurality of flow guide holes increases from top to bottom.
3. A liquid-cooled driving motor as claimed in claim 1, wherein the stator core (3) is formed by pressing a plurality of silicon steel sheets (33), the cross-section of the stator core liquid channel (30) is rectangular, and the stator core liquid channel (30) runs parallel to the plane of the silicon steel sheets.
4. The liquid-cooled drive motor according to claim 1, wherein the drive motor (100) further comprises a first magnetic shielding plate (7 a) and a second magnetic shielding plate (7 b) disposed on both sides of the rotor core (6) in the axial direction.
5. The liquid-cooled driving motor according to claim 4, wherein the first magnetism-isolating plate (7 a) is internally provided with a first axial spiral liquid channel (70 a) and a second axial spiral liquid channel (70 b) which are symmetrical in center;
the plurality of liquid channel liquid spray openings comprise a first liquid channel liquid spray opening (53 a) and a second liquid channel liquid spray opening (53 b);
the first liquid channel liquid spraying opening (53 a) and the second liquid channel liquid spraying opening (53 b) are respectively connected with the first axial spiral liquid channel
(70a) Is communicated with a second axial spiral liquid channel (70 b);
the first axial spiral liquid channel (70 a) is provided with a first liquid spraying port (71 a), and the second axial spiral liquid channel
(70b) The stator winding structure comprises a second liquid spraying port (71 b), wherein the first liquid spraying port (71 a) and the second liquid spraying port (71 b) are bent along the end direction of the stator winding (4);
the first liquid spraying opening (71 a) and the second liquid spraying opening (71 b) respectively throw liquid to the inner circumferential surface of the stator winding (4)
Is discharged through the corresponding liquid outlet (12).
6. The liquid-cooled driving motor according to claim 5, wherein the second magnetic isolation plate (7 b) is internally provided with a third axial spiral liquid channel (70 c) and a fourth axial spiral liquid channel (70 d) which are centrosymmetric;
the plurality of liquid channel liquid spraying ports further comprise a third liquid channel liquid spraying port (53 c) and a fourth liquid channel liquid spraying port (53 d);
the third liquid channel liquid spraying port (53 c) and the fourth liquid channel liquid spraying port (53 d) are respectively connected with the third axial spiral liquid channel
(70c) Is communicated with a fourth axial spiral liquid channel (70 d);
the third axial spiral liquid channel (70 c) is provided with a third liquid spraying port (71 c), the fourth axial spiral liquid channel (70 d) is provided with a fourth liquid spraying port (71 d), and the third liquid spraying port (71 c) and the fourth liquid spraying port (71 d) are both bent along the end direction of the stator winding (4);
the third liquid spraying port (71 c) and the fourth liquid spraying port (71 d) are respectively used for throwing liquid to the inner circumferential surface of the stator winding (4) and then discharging the liquid through the corresponding liquid outlet (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810286752.7A CN108336865B (en) | 2018-03-30 | 2018-03-30 | Liquid cooling driving motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810286752.7A CN108336865B (en) | 2018-03-30 | 2018-03-30 | Liquid cooling driving motor |
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| CN108336865A CN108336865A (en) | 2018-07-27 |
| CN108336865B true CN108336865B (en) | 2024-03-05 |
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| CN201810286752.7A Active CN108336865B (en) | 2018-03-30 | 2018-03-30 | Liquid cooling driving motor |
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Families Citing this family (23)
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| KR20220082593A (en) * | 2020-12-10 | 2022-06-17 | 현대자동차주식회사 | Cooling device of motor |
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| CN113708549A (en) * | 2021-09-14 | 2021-11-26 | 威海西立电子有限公司 | Motor cooling device and motor |
| CN113708550B (en) * | 2021-09-14 | 2022-11-15 | 威海西立电子有限公司 | Electric machine |
| CN113890259A (en) * | 2021-10-12 | 2022-01-04 | 广州极飞科技股份有限公司 | A liquid-cooled motor device and automatic equipment |
| CN114448136A (en) * | 2021-12-22 | 2022-05-06 | 华南理工大学 | Motor with multiple cooling flow channels |
| DE102022107407B4 (en) | 2022-03-29 | 2024-07-04 | Schaeffler Technologies AG & Co. KG | stator |
| EP4507174A1 (en) * | 2022-04-12 | 2025-02-12 | Contemporary Amperex Intelligence Technology (Shanghai) Limited | Spray ring, motor, and vehicle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204013087U (en) * | 2014-06-23 | 2014-12-10 | 比亚迪股份有限公司 | Motor and there is its electric automobile |
| CN106533060A (en) * | 2015-09-14 | 2017-03-22 | 舍弗勒技术股份两合公司 | Cooling liquid sleeve and fixing device thereof and motor |
| CN206237253U (en) * | 2016-10-27 | 2017-06-09 | 蔚来汽车有限公司 | Motor direct cooling structure |
| CN206313565U (en) * | 2016-12-06 | 2017-07-07 | 蔚来汽车有限公司 | Motor rotor oil cooling structure and motor with same |
| CN206379783U (en) * | 2016-07-14 | 2017-08-04 | 中国第一汽车股份有限公司 | A kind of novel automobile power motor field frame assembly structure and its cooling system |
| DE102016112251A1 (en) * | 2016-07-05 | 2018-01-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Electric machine with a cooling device |
| CN207939351U (en) * | 2018-03-30 | 2018-10-02 | 北京理工大学 | A liquid-cooled drive motor |
-
2018
- 2018-03-30 CN CN201810286752.7A patent/CN108336865B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204013087U (en) * | 2014-06-23 | 2014-12-10 | 比亚迪股份有限公司 | Motor and there is its electric automobile |
| CN106533060A (en) * | 2015-09-14 | 2017-03-22 | 舍弗勒技术股份两合公司 | Cooling liquid sleeve and fixing device thereof and motor |
| DE102016112251A1 (en) * | 2016-07-05 | 2018-01-11 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Electric machine with a cooling device |
| CN206379783U (en) * | 2016-07-14 | 2017-08-04 | 中国第一汽车股份有限公司 | A kind of novel automobile power motor field frame assembly structure and its cooling system |
| CN206237253U (en) * | 2016-10-27 | 2017-06-09 | 蔚来汽车有限公司 | Motor direct cooling structure |
| CN206313565U (en) * | 2016-12-06 | 2017-07-07 | 蔚来汽车有限公司 | Motor rotor oil cooling structure and motor with same |
| CN207939351U (en) * | 2018-03-30 | 2018-10-02 | 北京理工大学 | A liquid-cooled drive motor |
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