WO2011069313A1 - 一种电机以及一种对电机进行油冷却的方法 - Google Patents
一种电机以及一种对电机进行油冷却的方法 Download PDFInfo
- Publication number
- WO2011069313A1 WO2011069313A1 PCT/CN2010/000119 CN2010000119W WO2011069313A1 WO 2011069313 A1 WO2011069313 A1 WO 2011069313A1 CN 2010000119 W CN2010000119 W CN 2010000119W WO 2011069313 A1 WO2011069313 A1 WO 2011069313A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- casing
- stator fixing
- fixing table
- stator
- Prior art date
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 45
- 238000004804 winding Methods 0.000 claims abstract description 60
- 238000009413 insulation Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 154
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
Definitions
- This invention relates to mechanical manufacturing techniques, and more particularly to an electric machine and a method of oil cooling the electric machine.
- the winding coils in the motor are cooled by cooling oil.
- Most of the oil circuit design for the cooling scheme of the winding coil of the motor from the oil inlet hole to the oil passage of the oil outlet hole, often has a plurality of 90o turns, causing the cooling oil to lose pressure, so the cooling oil will not come out
- the oil holes are sprayed onto the winding coils, but naturally flow out due to gravity.
- FIG. 1 is a schematic view of a housing and a stator assembly of a prior art motor. As shown in Fig. 1, a plurality of winding coils 6 are arranged along the inner arc of the outer casing 11 of the motor. The housing end cap is not illustrated in FIG.
- Figure 2 is a cross-sectional view taken along line AA' shown in Figure 1.
- the outer casing 11 of the motor includes a casing 1, an oil inlet hole 7, an oil passage 2 (oil guiding path), an oil outlet hole 3, a stator fixing table 8, and a casing end cover 10.
- the motor shown in Fig. 2 further includes a stator assembly attached to the outer casing, which is composed of a stator core 5, a winding coil 6, and a slot insulation. Slot insulation is not seen in the cross-sectional view shown in Figure 2, and slot insulation is not shown in Figure 2.
- the line of the cooling oil from the oil inlet hole 7 through the oil passage 2 to the oil outlet hole 3 is also indicated by an arrow in FIG.
- FIG. 3 is a cross-sectional view taken along line BB' shown in Figure 2 .
- the housing 1, the oil passage 2, the oil outlet 3, the winding coil 6 and the stator fixing table 8 and the slot insulation 12 are illustrated, and the cooling oil is indicated by arrows from the oil inlet hole 7 through the oil passage 2.
- the line that reaches the oil outlet 3 also indicates the line of cooling oil that is lost along the circumferential wall of the casing due to the tension effect. This is because for the oil outlet located at an angle of the circumference, when the oil is out of the hole, the oil will be lost along the circumferential wall of the outer casing and the end cap of the casing, and will not fall directly on the winding coil.
- grooves are placed under the winding coils that accumulate some oil in order to soak the winding coils in oil for cooling.
- the installation and manufacture of these grooves are not easy, and in particular, it is necessary to ensure that the coils are not touched when the grooves are installed to prevent damage to the insulation of the coils.
- the lower side of the coil is usually very close to the air gap of the motor, and the groove does not have an effect on the space of the air gap.
- the cooling oil is cooled to the uppermost winding coil, the oil heated by the heat taken away from the winding coil will flow along the circumferential groove to the next winding coil for cooling, and so on. This results in uneven cooling of each winding coil.
- the existing cooling motor winding coil scheme has a low cooling efficiency, so that the temperature resistance of the motor is poor.
- the present invention also provides an electric motor capable of efficiently cooling its own winding coil and having high temperature resistance.
- the invention also provides a method for oil cooling the motor, which can efficiently cool the winding coil of the motor, so that the motor has high temperature resistance.
- the invention discloses an electric machine comprising: an outer casing and a stator assembly;
- the outer casing comprises: a casing (1), an oil inlet hole (7), an oil passage (2), an oil outlet hole (3), a stator fixing platform (8) and a casing end cover (10); wherein The oil inlet hole (7) is located on the casing (1), the oil outlet hole (3) is located on the stator fixing table (8), the oil passage (2) is located inside the casing (1), and is The oil inlet hole (7) and the oil outlet hole (3) are in communication;
- the stator assembly comprises: a stator core (5), a winding coil (6) and a slot insulation (12); the oil outlet (3) is located above the winding coil (6);
- the motor further includes: a guiding step located between the oil outlet hole (3) and the winding coil (6);
- the cooling oil entering from the oil inlet hole (7) flows through the oil passage (2), flows out from the oil outlet hole (3), and is guided on the winding coil (6) under the guidance of the guide step.
- the guiding step is fixed on the stator fixing platform (8);
- the guiding step is cast integrally with the stator fixing table (8).
- the stator fixing table (8) is fixed on the casing (1), or the stator fixing table (8) is integrally molded with the casing (1);
- stator fixing table (8) is fixed to the housing end cover (10), or the stator fixing table (8) is integrally molded with the housing end cover (10).
- the shape of the guiding step is: cylindrical, or V-shaped, or semi-circular, or semi-elliptical, or three-sided rectangular.
- a plurality of oil outlet holes (3) are distributed on the circumferential wall of the stator fixing table (8), and sequentially descend from the top end of the stator fixing table (8), and the apertures of the oil outlet holes (3) are sequentially increased.
- the invention also discloses a method for oil cooling an electric motor, which method is applicable to a motor comprising a casing and a stator assembly;
- the outer casing comprises: a casing (1), an oil inlet hole (7), an oil passage (2), an oil outlet hole (3), a stator fixing platform (8) and a casing end cover (10); wherein The oil inlet hole (7) is located on the casing (1), the oil outlet hole (3) is located on the stator fixing table (8), the oil passage (2) is located inside the casing (1), and is The oil inlet hole (7) and the oil outlet hole (3) are in communication;
- the stator assembly comprises: a stator core (5), a winding coil (6) and a slot insulation (12); the oil outlet (3) is located above the winding coil (6);
- the method comprises: providing a guiding step between the oil outlet hole (3) and the winding coil (6); when the cooling oil enters from the oil inlet hole (7) and flows through the oil passage (2), from the oil outlet hole (3) At the time of outflow, the guiding step guides the cooling oil flowing out of the oil outlet hole (3) and is deposited on the winding coil (6).
- the guiding step and the stator fixing table (8) are integrally cast.
- stator fixing table (8) on the casing (1), or casting the stator fixing table (8) and the casing (1) into one body;
- stator fixing table (8) is fixed to the housing end cover (10), or the stator fixing table (8) and the housing end cover (10) are integrally cast.
- the shape of the guiding step is: cylindrical, or V-shaped, or semi-circular, or semi-elliptical, or three-sided rectangular.
- a plurality of oil outlet holes (3) are distributed on the circumferential wall of the stator fixing table (8), and sequentially descend from the top end of the stator fixing table (8), and the apertures of the oil outlet holes (3) are sequentially increased.
- the guiding step is provided between the oil outlet hole of the motor and the winding coil of the present invention, and when the cooling oil enters from the oil inlet hole and flows through the oil passage and flows out from the oil outlet hole, the guiding The step of guiding the cooling oil flowing out from the oil outlet hole and pouring on the winding coil prevents the cooling oil from flowing out of the oil outlet hole, and the cooling oil is lost due to the tension along the circumferential wall of the outer casing and the end cap of the casing. Directly on the winding coils, so that the winding coils can be uniformly cooled. This greatly improves the cooling efficiency of the motor winding coil, thereby improving the temperature resistance of the motor.
- FIG. 1 is a schematic view of a housing and a stator assembly of a prior art motor
- Figure 2 is a cross-sectional view taken along line AA' shown in Figure 1;
- Figure 3 is a cross-sectional view taken along line BB' shown in Figure 2;
- Figure 4 is a schematic view showing a first embodiment of the motor in the present invention.
- Figure 5 is a cross-sectional view taken along line CC' shown in Figure 4;
- Figure 6 is a schematic view showing a second embodiment of the motor in the present invention.
- Figure 7 is a schematic structural view of a V-shaped guiding step in the embodiment shown in Figure 6;
- Figure 8 is a cross-sectional view taken along line DD' shown in Figure 6.
- the core idea of the invention is to add a guiding step for guiding the cooling oil to the winding coil in the motor, so that the cooling oil is directly poured onto the winding coil under the action of the guiding step without the circumferential wall and the housing end of the casing. The cover is drained.
- Fig. 4 is a schematic view showing a first embodiment of the motor in the present invention.
- Figure 4 is a cross-sectional view showing a cross-sectional view taken along line AA' of the view shown in Figure 1.
- the motor includes a housing and a stator assembly.
- the housing includes: a housing 1, an oil inlet hole 7, an oil passage 2, an oil outlet hole 3, a stator fixing table 8, and a housing end cover 10; wherein the oil inlet hole 7 is located on the housing 1,
- the oil outlet 3 is located on the stator fixing table 8, and the oil passage 2 is located inside the casing 1 and communicates with the oil inlet hole 7 and the oil outlet hole 3.
- the stator assembly comprises: a stator core 5, a winding coil 6 and a slot insulation 12; here, the slot insulation 12 is not visible in the cross-sectional view shown in Figure 4, but the position of the slot insulation 12 will be illustrated in subsequent Figure 5.
- the oil outlet 3 is located above the winding coil 6. The above structure is the same as the prior art.
- the motor shown in FIG. 4 further includes a guiding step 4 between the oil outlet hole 3 and the winding coil 6.
- the guiding step 4 is cylindrical in shape.
- the cooling oil entering from the oil inlet hole 7 flows through the oil passage 2, flows out from the oil discharge hole 3, and then flows out along the inner cavity of the guide step 4 under the guidance of the cylindrical guide step 4, directly It is deposited on the winding coil 6 without being lost along the circumferential wall of the casing.
- a cylindrical guiding step 4 may be fixed to the stator fixing table 8, or the cylindrical guiding step 4 may be cast with the stator fixing table 8.
- the stator fixing table 8 may be fixed to the housing 1, or the stator fixing table 8 may be cast integrally with the housing 1.
- the stator fixing table 8 can also be fixed to the housing end cover 10, or the stator fixing table 8 can also be cast integrally with the housing end cover 10.
- the oil passage 2 is grooved, drilled, or cast inside the casing 1.
- Figure 5 is a cross-sectional view taken along line CC' shown in Figure 4 .
- the slot insulation 12 which is not illustrated in Fig. 4, is illustrated, and the cooling oil is indicated by arrows from the oil inlet hole 7 through the oil passage 2 to the oil outlet hole 3, and from the oil outlet hole 3 through the circle.
- the cylindrical guiding step 4 reaches the line of the winding coil 6.
- a plurality of oil outlets 3 are distributed on the circumferential wall of the stator fixing table 8, and only one oil inlet hole 7 is located at the top end of the housing 1, and in the prior art, the size of each oil outlet 3 Consistently, the oil discharge amount of the oil discharge hole 3 at the topmost end of the stator fixing table 8 is the largest, and the oil discharge amount of each oil discharge hole 3 is gradually decreased from the top end of the stator fixed table 8, resulting in each The cooling of the winding coil 6 is uneven. Therefore, in the embodiment of the present invention, the apertures of the oil outlets 3 are sequentially increased from the top end of the stator fixing table 8 in order, so that the oil output in each oil outlet hole 3 is substantially uniform. This prevents most of the oil from flowing from one oil hole 3 to one coil, resulting in a decrease in the oil output of the subsequent oil outlet 3.
- Fig. 6 is a schematic view showing a second embodiment of the motor in the present invention.
- Figure 6 is a cross-sectional view, taken along the line AA' of the view shown in Figure 1.
- the motor includes a housing and a stator assembly.
- the housing includes: a housing 1, an oil inlet hole 7, an oil passage 2, an oil outlet hole 3, a stator fixing table 8, and a housing end cover 10; wherein the oil inlet hole 7 is located on the housing 1,
- the oil outlet 3 is located on the stator fixing table 8, and the oil passage 2 is located inside the casing 1 and communicates with the oil inlet hole 7 and the oil outlet hole 3.
- the stator assembly comprises: a stator core 5, a winding coil 6 and a slot insulation 12; here, the slot insulation 12 is not visible in the cross-sectional view shown in Fig. 6, but the position of the slot insulation 12 will be illustrated in subsequent Fig. 8.
- the oil outlet 3 is located above the winding coil 6. The above structure is the same as the prior art.
- the motor shown in FIG. 6 further includes a V-shaped guide step 9 which is located between the oil outlet hole 3 and the winding coil 6.
- a V-shaped guide step 9 which is located between the oil outlet hole 3 and the winding coil 6.
- a V-shaped guide step 9 may be fixed to the stator fixing table 8, or the V-shaped guide step 9 may be integrally molded with the stator fixing table 8.
- the stator fixing table 8 may be fixed to the housing 1, or the stator fixing table 8 may be cast integrally with the housing 1.
- the stator fixing table 8 can also be fixed to the housing end cover 10, or the stator fixing table 8 can also be cast integrally with the housing end cover 10.
- the oil passage 2 is grooved, drilled, or cast inside the casing 1.
- Figure 8 is a cross-sectional view taken along line DD' shown in Figure 6.
- the slot insulation 12 which is not illustrated in Fig. 6, is illustrated, and the cooling oil is indicated by arrows from the oil inlet hole 7 through the oil passage 2 to the oil outlet hole 3, and from the oil outlet hole 3 through the V.
- the shaped guiding step 9 reaches the line of the winding coil 6.
- a cylindrical guide step 4 and a V-shaped guide step 9 are given.
- the guiding steps may also be semi-circular, semi-elliptical or three-sided rectangular, which are not enumerated here.
- the existing motor coil oil cooling scheme only drills an oil hole on the casing or drills a plurality of oil outlet holes along the circumference, but does not install a guide step, so oil is discharged from these oils. After the holes come out, due to the tension and low pressure of the oil, most of the oil is lost along the circumferential wall surface or the end cover of the casing, and the coil is not directly cooled.
- a guiding step is arranged between the oil outlet hole of the motor and the winding coil, and when the cooling oil enters from the oil inlet hole and flows through the oil passage and flows out from the oil outlet hole, the guiding step guides the oil from the oil outlet.
- the technical solution of the cooling oil flowing out of the hole and dripping on the winding coil avoids the loss of the cooling oil from the oil outlet hole, and the cooling oil is directly deposited on the winding coil due to the loss of the tension along the circumferential wall of the outer casing and the end cap of the casing.
- Upper in turn, enables the winding coil to be uniformly cooled. This greatly improves the cooling efficiency of the motor winding coil, thereby improving the temperature resistance of the motor.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Description
Claims (1)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012542338A JP6070935B2 (ja) | 2009-12-08 | 2010-01-26 | 電動モータ及び電動モータの油冷却方法 |
US13/513,019 US8786146B2 (en) | 2009-12-08 | 2010-01-26 | Electric machine and oil cooling method for electrical machine |
EP10835351.7A EP2512011B1 (en) | 2009-12-08 | 2010-01-26 | Motor and oil cooling method for a motor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200910252069.2 | 2009-12-08 | ||
CN200910252069A CN101777816B (zh) | 2009-12-08 | 2009-12-08 | 一种电机以及一种对电机进行油冷却的方法 |
Publications (1)
Publication Number | Publication Date |
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WO2011069313A1 true WO2011069313A1 (zh) | 2011-06-16 |
Family
ID=42514185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2010/000119 WO2011069313A1 (zh) | 2009-12-08 | 2010-01-26 | 一种电机以及一种对电机进行油冷却的方法 |
Country Status (5)
Country | Link |
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US (1) | US8786146B2 (zh) |
EP (1) | EP2512011B1 (zh) |
JP (1) | JP6070935B2 (zh) |
CN (1) | CN101777816B (zh) |
WO (1) | WO2011069313A1 (zh) |
Families Citing this family (17)
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JP5505275B2 (ja) * | 2010-11-22 | 2014-05-28 | アイシン・エィ・ダブリュ株式会社 | ステータ冷却装置 |
JP5765149B2 (ja) * | 2011-09-05 | 2015-08-19 | トヨタ自動車株式会社 | 回転電機 |
US9755482B2 (en) | 2013-03-12 | 2017-09-05 | Regal Beloit America, Inc. | Electric machine with liquid cooling and method of assembling |
WO2015049711A1 (ja) * | 2013-10-02 | 2015-04-09 | 川崎重工業株式会社 | 電動車両 |
DE102014219724A1 (de) * | 2014-09-29 | 2016-03-31 | Robert Bosch Gmbh | Elektrische Maschine mit Kühlung |
JP6669036B2 (ja) * | 2016-10-21 | 2020-03-18 | 株式会社デンソー | 回転電機 |
US10615667B2 (en) * | 2016-12-05 | 2020-04-07 | Mitsubishi Electric Corporation | Rotary electric machine |
CN106877549A (zh) * | 2017-04-24 | 2017-06-20 | 湖州太平微特电机有限公司 | 一种电动机 |
JP6436200B1 (ja) | 2017-08-25 | 2018-12-12 | 株式会社明電舎 | 回転電機の固定子の冷却構造 |
WO2019117229A1 (ja) * | 2017-12-15 | 2019-06-20 | イーグル工業株式会社 | 電動機 |
JP2019154200A (ja) * | 2018-03-06 | 2019-09-12 | アイシン・エィ・ダブリュ株式会社 | 油供給装置 |
US10892668B2 (en) | 2019-04-12 | 2021-01-12 | Ford Global Technologies, Llc | Cooling systems for cooling electric machines within electrified vehicles |
US11750059B2 (en) | 2020-02-07 | 2023-09-05 | Deere & Company | End shield with spray feature |
WO2022028382A1 (zh) * | 2020-08-03 | 2022-02-10 | 安徽威灵汽车部件有限公司 | 电机和车辆 |
CN113162281B (zh) * | 2021-03-02 | 2023-03-10 | 华中科技大学 | 一种具有冷却结构的外转子电机 |
CN113922588B (zh) * | 2021-10-12 | 2023-01-20 | 臻驱科技(上海)有限公司 | 一种电驱动系统的铜排油冷结构 |
CN113922567B (zh) * | 2021-10-12 | 2023-01-20 | 臻驱科技(上海)有限公司 | 一种电驱动系统及该电驱动系统的铜排油冷结构 |
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- 2010-01-26 EP EP10835351.7A patent/EP2512011B1/en active Active
- 2010-01-26 WO PCT/CN2010/000119 patent/WO2011069313A1/zh active Application Filing
- 2010-01-26 US US13/513,019 patent/US8786146B2/en active Active
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Also Published As
Publication number | Publication date |
---|---|
CN101777816A (zh) | 2010-07-14 |
EP2512011B1 (en) | 2017-10-04 |
JP2013513354A (ja) | 2013-04-18 |
JP6070935B2 (ja) | 2017-02-01 |
EP2512011A4 (en) | 2016-05-18 |
EP2512011A1 (en) | 2012-10-17 |
CN101777816B (zh) | 2012-09-05 |
US20120235521A1 (en) | 2012-09-20 |
US8786146B2 (en) | 2014-07-22 |
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