CN112311149A - Cooling fluid guide for cooling a rotor of an electric machine - Google Patents
Cooling fluid guide for cooling a rotor of an electric machine Download PDFInfo
- Publication number
- CN112311149A CN112311149A CN202010756717.4A CN202010756717A CN112311149A CN 112311149 A CN112311149 A CN 112311149A CN 202010756717 A CN202010756717 A CN 202010756717A CN 112311149 A CN112311149 A CN 112311149A
- Authority
- CN
- China
- Prior art keywords
- cooling fluid
- cooling
- fluid guiding
- rotor
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012809 cooling fluid Substances 0.000 title claims abstract description 175
- 238000001816 cooling Methods 0.000 title claims abstract description 19
- 238000007599 discharging Methods 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 239000002918 waste heat Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
A cooling fluid guide device for cooling a rotor (6) of an electric machine, which is connected to a rotor shaft (1), having a closed cooling fluid circuit is proposed, wherein the closed cooling fluid circuit is provided by a cooling fluid guide sleeve (2, 2A) having at least one peripheral cooling fluid guide path and a cooling fluid jacket (3, 3A) surrounding the cooling fluid guide sleeve (2, 2A). Furthermore, an electric machine with a cooling fluid guide is proposed.
Description
Technical Field
The invention relates to a cooling fluid guide device for cooling a rotor of an electric machine, which rotor is connected to a rotor shaft, having a closed cooling fluid guide circuit. The invention also relates to an electric machine having a cooling fluid guide.
Background
An electric motor is known, for example, from DE 102017112835 a1, in which a cooling structure close to the surface extends around the rotor shaft of the electric motor. The separate cooling provided for the electric motor is achieved by means of flat cooling water and oil ducts running along the structure, wherein the oil ducts are inserted in sections between two respective adjacent sections of the wider cooling water duct. The known cooling devices have been shown to be structurally complex and expensive.
Disclosure of Invention
The object underlying the invention is to provide a cooling fluid guide for cooling a rotor of an electric machine and an electric machine having the cooling fluid guide, which on the one hand allow optimum cooling and on the other hand allow a simple and cost-effective design.
This object is achieved by the features of patent claim 1 or 11, wherein advantageous and claimed improvements result from the subclaims and the description and the drawing.
A cooling fluid guide device for cooling a rotor of an electric machine connected to a rotor shaft, having a closed cooling fluid guide circuit, is therefore proposed. In order to provide a particularly simple and cost-effective and optimized cooling, a cooling fluid guide sleeve having at least one cooling fluid guide path along the outer circumference and a cooling fluid jacket surrounding the cooling fluid guide sleeve are provided to form a closed cooling fluid guide circuit.
In this way, a structurally particularly simple and cost-effective cooling fluid guide is achieved, which makes it possible to optimally dissipate the waste heat generated by the rotor and the rotor shaft as well as the winding heads of the stator and other components arranged in the housing. By providing a cooling fluid guide sleeve and a cooling fluid jacket, a closed cooling fluid guide circuit is advantageously realized using only two components, wherein it is possible to also provide a one-piece construction.
The type of cooling fluid conducting circuit can be realized in different ways in the proposed cooling fluid conducting device. Within the scope of an advantageous embodiment of the invention, a spiral-shaped path is provided, which is wound almost spirally around the outer circumference of the cooling fluid guide sleeve. A double spiral path is particularly advantageous, so that the cooling fluid is introduced via a first spiral path and is discharged via a second spiral path.
Another cooling fluid guide can be realized in the proposed cooling fluid guide device by: a meandering route or the like is provided as the cooling fluid guide route. In order to achieve, for example, a meandering course, a plurality of guide webs or the like projecting from the circumference of the cooling fluid guide sleeve can be arranged distributed over the circumference in order to provide the desired meandering course around the circumference of the cooling fluid guide sleeve.
In order to achieve an optimum cooling effect by means of the proposed cooling fluid guiding device, it may be proposed within the scope of the invention that: a cooling fluid guide sleeve connected with the cooling fluid bushing is arranged radially between and connected with the rotor shaft and the rotor. The cooling fluid circuit with the cooling fluid guide sleeve and the cooling fluid jacket is therefore arranged radially inside the rotor and radially outside the rotor shaft.
In this way, the cooling fluid guiding device is arranged coaxially with the rotor shaft and the rotor, almost radially between these two components. The cooling fluid flowing through the cooling fluid guiding device can thus directly absorb the waste heat of the rotor radially outside. Furthermore, for example, the air flowing through suitable air guide channels or air guide paths of the rotor shaft can be sufficiently cooled at the inner circumference of the cooling fluid guide sleeve. Therefore, the outer and inner peripheries of the cooling fluid guide device almost serve as surface coolers for the rotor and the rotor shaft of the electric machine and for other components provided in the housing.
A particularly preferred embodiment of the invention provides that: the cooling fluid guide is supplied with cooling fluid by a cooling fluid supply arranged outside the housing or fixed in position or on the housing side. Since the cooling fluid guide sleeve is mounted in a rotationally fixed manner with the rotor shaft in the connected state, the cooling fluid circuit can be connected in a flow-wise manner to the cooling fluid guide by means of a swivel joint.
Another aspect of the invention proposes to protect an electric machine having a cooling fluid guiding device as described above, whereby the above-mentioned and further advantages are obtained.
Drawings
The invention is explained in detail below with the aid of the figures. In the drawings:
fig. 1 shows a partially cut-away view of a first embodiment variant of a cooling fluid guide according to the invention in an electric machine;
fig. 2 shows an individual component view according to fig. 1 of a cooling fluid guide sleeve of a cooling fluid guide device, which cooling fluid guide sleeve has a spiral cooling fluid guide path;
fig. 3 shows a cut-away view of a cooling fluid guide sleeve according to fig. 1 and 2 connected with a cooling fluid bushing;
fig. 4 shows a partially cut-away view of a second embodiment variant of the cooling fluid guide according to the invention in an electric machine;
fig. 5 shows an individual component view according to fig. 4 of a cooling fluid guide sleeve with a meandering cooling fluid guide path;
fig. 6 shows a cut-away view of a cooling fluid guide sleeve according to fig. 4 and 5 connected with a cooling fluid bushing; and is
Fig. 7 shows an individual component view of a rotor shaft of an electric machine provided with a spiral-shaped air guide channel.
Detailed Description
Fig. 1 to 3 show exemplary first embodiment variants of the cooling fluid line arrangement according to the invention, and fig. 4 to 6 show possible second embodiment variants of the cooling fluid line arrangement. Fig. 7 shows an exemplary rotor shaft 1 of an electric machine, which is provided with an air cooling. Preferably, water or a water-glycol mixture or also other fluids (e.g. oil) can be used as cooling fluid.
Independently of the respective embodiment variant, the proposed cooling fluid conducting device for cooling the rotor 6 and the stator 8 of an electric machine, which are connected to the rotor shaft 1, makes a closed cooling fluid conducting circuit. The rotor shaft 1 is connected with a drive shaft 18 of the electric machine for transmitting torque.
In order to achieve a structurally simple and cost-effective and efficient cooling, it is proposed: a cooling fluid guide sleeve 2, 2A with at least one cooling fluid guide path along the outer circumference and a cooling fluid jacket 3, 3A surrounding the cooling fluid guide sleeve 2, 2A are provided. By connecting the cooling fluid guide sleeve 2, 2A with the cooling fluid jacket 3, 3A, a closed cooling fluid circuit is formed.
Within the scope of the first embodiment variant of the cooling fluid guide device illustrated in fig. 1 to 3, the cooling fluid guide sleeve 2 has a helical course as the cooling fluid guide course. A spiral first line 4 for the introduction of the cooling fluid and a spiral second line 5 for the discharge of the cooling fluid are arranged on the outer diameter of the cooling fluid guide sleeve 2.
Fig. 1 shows a sectional view of a first embodiment variant of a cooling fluid conducting device in an electric machine. A cooling fluid guide sleeve 2 connected with the cooling fluid bushing 3 is arranged radially between the rotor shaft 1 and the rotor 6 in a housing 7 of the electric machine. The cooling fluid guiding means are thus arranged coaxially with the rotor shaft 1 and the rotor 6 and radially inside the rotor 6 and radially outside the rotor shaft 1. The cooling fluid guide can therefore remove waste heat from the winding heads of the rotor 6 and stator 8 in the housing 7 as well as from the rotor shaft 1.
As can be seen in particular from the individual component view according to fig. 7, the outer circumference of the rotor shaft 1 has a spiral-shaped air guide path or air guide channel 9, so that an air flow for air cooling is generated in the housing 7 by the rotation of the rotor shaft 1. The air flow is guided along the inner circumference of the cooling fluid guiding sleeve 2 for cooling.
As can be seen from the illustrations according to fig. 1 and 2, the cooling fluid inlet 15 and the cooling fluid outlet 16 are arranged opposite in the circumferential direction at the same end of the cooling fluid guide sleeve 2. In the embodiment variant of the cooling fluid conducting device shown in fig. 1, it is proposed that: the cooling fluid circuit is connected with its cooling fluid inlet 15 and its cooling fluid outlet 16 to the cooling fluid guide circuit on the housing side via the cooling fluid inlet channel 10 and the cooling fluid outlet channel 11 of the rotary joint 12. The dual-channel swivel joint 12 comprises two distribution sleeves which provide separate cooling fluid inlets and separate cooling fluid outlets. However, it is also possible to provide other connections for supplying the cooling fluid.
The respective flow directions of the cooling fluid in the spiral-shaped first course 4 and in the spiral-shaped second course 5 are indicated by the respective arrows in fig. 2. Fig. 3 shows the cooling fluid guide sleeve 2 with the attached cooling fluid jacket 3 in a sectional view.
Fig. 4 shows an exemplary second embodiment variant of the cooling fluid conducting device in the housing 7 of the electric machine. In a second embodiment variant, the cooling fluid guide sleeve 2A has a meandering course 17. As in the first embodiment variant, the cooling fluid guide sleeve 2A connected to the cooling fluid jacket 3A is also arranged coaxially with the rotor 6 and the rotor shaft 1 of the electric machine in the housing 7. The cooling fluid guide sleeve 2A and the cooling fluid jacket 3A are thus located inside the rotor 6 and radially outside the rotor shaft 1. In a second embodiment variant, corresponding air cooling is also ensured by the connection of the rotor shaft 1 with the air guide channel (9) to the cooling fluid guide provided. In addition, in the second embodiment variant, the cooling fluid inlet 15 and the cooling fluid outlet 16 are also connected to a cooling fluid supply device located outside the housing 7 by means of the swivel joint 12.
The individual component view of the cooling fluid guiding sleeve 2A illustrated in fig. 5 shows a meandering course 17 for guiding the cooling fluid, wherein the flow direction is indicated by corresponding arrows. For this purpose, the radial guide webs 13 which are arranged distributed in the circumferential direction and project radially from the outer circumference of the cooling fluid guide sleeve 2A are arranged in such a way that the meandering course 17 is guided, for example, clockwise in the circumferential direction of the cooling fluid guide sleeve 2A. At one end of the meandering course, the cooling fluid is guided via a guide channel 14 arranged at the end side into a cooling fluid outflow 16. The cooling fluid outflow 16 is connected in a flow sense to the cooling fluid outflow channel 11.
In a second embodiment variant, the cooling fluid inlet channel 10 or the cooling fluid inlet 15 and the cooling fluid outlet channel 11 or the cooling fluid outlet 16 are also arranged opposite in the circumferential direction at the same end of the cooling fluid guide sleeve 2A.
Fig. 6 shows an assembled state of a second embodiment variant of the cooling fluid guide device, in which the cooling fluid guide sleeve 2A is connected to the cooling fluid jacket 3A.
List of reference numerals
1 rotor shaft
2, 2A Cooling fluid guide Sleeve
3, 3A Cooling fluid Sleeve
4 first path of spiral shape
5 second course of spiral shape
6 rotor
7 casing
8 stator
9 air guide channel
10 cooling fluid inflow channel
11 cooling fluid outflow channel
12 swivel joint
13 guide spacer
14 end-side guide channel
15 inflow of cooling fluid
16 outflow of cooling fluid
17 meandering path
18 drive shaft of electric machine
Claims (11)
1. A cooling fluid guiding arrangement for cooling a rotor (6) of an electric machine connected to a rotor shaft (1), having a closed cooling fluid circuit, characterized in that the closed cooling fluid circuit is provided by a cooling fluid guiding sleeve (2, 2A) having at least one peripherally directed cooling fluid guiding route and a cooling fluid jacket (3, 3A) surrounding the cooling fluid guiding sleeve (2, 2A).
2. The cooling fluid guiding device according to claim 1, characterised in that the cooling fluid guiding sleeve (2) has a helical course (4, 5) as a cooling fluid guiding course.
3. The cooling fluid guide device according to claim 1 or 2, characterized in that a helical first course (4) for introducing cooling fluid and a helical second course (5) extending in the opposite direction for discharging cooling fluid are provided on the outer circumference of the cooling fluid guide sleeve (2).
4. The cooling fluid guiding device according to claim 1, characterized in that the cooling fluid guiding sleeve (2A) has a meandering course (17) as a cooling fluid guiding course.
5. The cooling fluid guiding device according to claim 4, characterized in that a plurality of guiding webs (13) arranged distributed in the circumferential direction, radially projecting from the outer circumference of the cooling fluid guiding sleeve (2A), are arranged in such a way that the meandering course (17) effects the introduction and discharge of cooling fluid in the circumferential direction of the cooling fluid guiding sleeve (2A).
6. The cooling fluid guiding device according to claim 5, characterized in that one end of the meandering course (17) is connected in a flow sense with a cooling fluid outflow (16) of the cooling fluid circuit by means of an end-side guiding channel (14).
7. The cooling fluid guiding device according to one of claims 4 to 6, characterised in that the cooling fluid inflow (15) and the cooling fluid outflow (16) of the cooling fluid circuit are arranged opposite in the circumferential direction at the same end of the cooling fluid guiding sleeve (2, 2A).
8. Cooling fluid guiding device according to one of claims 1, 2, 4-6, characterized in that a cooling fluid guiding sleeve (2, 2A) connected with the cooling fluid bushing (3, 3A) is arranged radially between the rotor shaft (1) and the rotor (6) and connected with the rotor shaft (1) and the rotor (6).
9. Cooling fluid guiding device according to one of claims 1, 2, 4-6, characterised in that the outer circumference of the rotor shaft (1) facing the inner circumference of the cooling fluid guiding sleeve (2, 2A) has a helical air guiding channel (9).
10. The cooling fluid guiding device according to one of claims 1, 2, 4-6, characterized in that the cooling fluid circuit is connected with a housing-side cooling fluid supply circuit by means of a swivel joint (12).
11. An electric machine having a cooling fluid guiding arrangement according to any one of claims 1-10.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019211523.3 | 2019-08-01 | ||
| DE102019211523.3A DE102019211523A1 (en) | 2019-08-01 | 2019-08-01 | Cooling fluid guide arrangement for cooling a rotor of an electrical machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112311149A true CN112311149A (en) | 2021-02-02 |
Family
ID=74174764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010756717.4A Pending CN112311149A (en) | 2019-08-01 | 2020-07-31 | Cooling fluid guide for cooling a rotor of an electric machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112311149A (en) |
| DE (1) | DE102019211523A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370507A (en) * | 2021-12-23 | 2022-04-19 | 伊格尔密封研发(无锡)有限公司 | Mechanical sealing element |
| FR3138859A1 (en) | 2022-08-10 | 2024-02-16 | IFP Energies Nouvelles | Electric machine rotor with cooling channel |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060175920A1 (en) * | 2002-07-12 | 2006-08-10 | Mitsubishi Denki Kabushiki Kaisha | Magnetic bearing spindle |
| CN103348571A (en) * | 2010-12-22 | 2013-10-09 | 株式会社Ihi | Rotary machine |
| WO2015083637A1 (en) * | 2013-12-05 | 2015-06-11 | 株式会社豊田自動織機 | Rotary electric machine |
| CN107078597A (en) * | 2014-10-23 | 2017-08-18 | 罗伯特·博世有限公司 | Fluid-cooled housing for motor |
| EP3301787A1 (en) * | 2016-09-29 | 2018-04-04 | Audi Ag | Electric machine with cooling system |
| CN207652160U (en) * | 2016-12-16 | 2018-07-24 | 保时捷股份公司 | Motor |
| WO2018197192A1 (en) * | 2017-04-26 | 2018-11-01 | Magna powertrain gmbh & co kg | Electric machine |
| CN109716623A (en) * | 2016-08-02 | 2019-05-03 | 整体动力***有限公司 | The method of slewing, motor and cooling motor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3009072A (en) * | 1958-01-28 | 1961-11-14 | Scott L & Electromotors Ltd | Fluid cooled motors |
| US3260872A (en) * | 1964-04-13 | 1966-07-12 | Bendix Corp | Oil cooled generator design |
| US20110089777A1 (en) * | 2009-10-18 | 2011-04-21 | Ernesto Camilo Rivera | Thermally manageable system and electric device |
| DE102017112835A1 (en) * | 2017-06-12 | 2018-12-13 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Electric machine, motor vehicle and method for producing an electrical machine |
-
2019
- 2019-08-01 DE DE102019211523.3A patent/DE102019211523A1/en active Pending
-
2020
- 2020-07-31 CN CN202010756717.4A patent/CN112311149A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060175920A1 (en) * | 2002-07-12 | 2006-08-10 | Mitsubishi Denki Kabushiki Kaisha | Magnetic bearing spindle |
| CN103348571A (en) * | 2010-12-22 | 2013-10-09 | 株式会社Ihi | Rotary machine |
| WO2015083637A1 (en) * | 2013-12-05 | 2015-06-11 | 株式会社豊田自動織機 | Rotary electric machine |
| CN107078597A (en) * | 2014-10-23 | 2017-08-18 | 罗伯特·博世有限公司 | Fluid-cooled housing for motor |
| CN109716623A (en) * | 2016-08-02 | 2019-05-03 | 整体动力***有限公司 | The method of slewing, motor and cooling motor |
| EP3301787A1 (en) * | 2016-09-29 | 2018-04-04 | Audi Ag | Electric machine with cooling system |
| CN107888024A (en) * | 2016-09-29 | 2018-04-06 | 奥迪股份公司 | Cooling system |
| CN207652160U (en) * | 2016-12-16 | 2018-07-24 | 保时捷股份公司 | Motor |
| WO2018197192A1 (en) * | 2017-04-26 | 2018-11-01 | Magna powertrain gmbh & co kg | Electric machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019211523A1 (en) | 2021-02-04 |
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