CN114631248B - Cooling structure of driving motor rotor - Google Patents
Cooling structure of driving motor rotor Download PDFInfo
- Publication number
- CN114631248B CN114631248B CN202080074064.XA CN202080074064A CN114631248B CN 114631248 B CN114631248 B CN 114631248B CN 202080074064 A CN202080074064 A CN 202080074064A CN 114631248 B CN114631248 B CN 114631248B
- Authority
- CN
- China
- Prior art keywords
- pipe
- cooling
- rotating shaft
- rotor
- cooling fluid
- 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.)
- Active
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 70
- 239000012809 cooling fluid Substances 0.000 claims abstract description 42
- 238000007599 discharging Methods 0.000 claims abstract 2
- 238000005452 bending Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 10
- 230000001360 synchronised effect Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a rotor cooling structure of a driving motor, which is characterized in that an integrated cooling fluid supply pipe is formed in a mode of being capable of being arranged inside and outside a hollow rotating shaft of the driving motor, and is arranged inside the rotating shaft and outside a cooling cover, the cooling fluid supply pipe is only assembled by using a connecting device such as a bolt and the like, and the cooling fluid supply pipe can be arranged on the rotating shaft and the cooling cover through a simple process, so that the rotor cooling structure of the driving motor with the assembly property improved. The hollow rotor cooling structure includes rotor core combined with the rotating shaft, through hole communicated with the rotating shaft, and cooling hood to connect the through hole with the rotating shaft and to combine with the rotating shaft. An integral pipe structure installed inside the rotating shaft and outside the cooling cover through the through hole, and a cooling fluid supply pipe for discharging the cooling fluid provided through one end of the cooling cover outside to the rotating shaft through the other end of the rotating shaft inside. The cooling fluid supply pipe comprises connection means on the cooling jacket.
Description
Technical Field
The present invention relates to a rotor cooling structure of a driving motor, which can be installed inside and outside a hollow rotating shaft of the driving motor to form an integrated cooling fluid supply pipe, and is installed inside the rotating shaft and outside a cooling cover, so that the cooling fluid supply pipe is assembled only by using a connecting device such as a bolt, and is installed on the rotating shaft and the cooling cover through a relatively easy and simple process, thereby improving the assemblability.
Background
In general, an electric vehicle called an eco-friendly vehicle generates a driving force by a driving motor that obtains a rotational force by electric energy.
As described above, permanent magnet synchronous motors (Permanent Magnet Synchronous Motor: PMSM) are widely used as drive motors for power sources of environmental protection vehicles such as electric vehicles and hybrid vehicles.
In order for a permanent magnet synchronous motor to exert maximum performance under limited layout conditions, it is necessary to maximize the performance of the permanent magnet, in which neodymium (Nd) components can improve the strength of the permanent magnet, and dysprosium (Dy) components can improve the resistance to high temperature Demagnetization (de-magnetization).
However, rare earth (Nd, dy) metal elements of such permanent magnets are buried under the ground of limited countries such as china, and are very expensive and have a large price variation.
For such reasons, field winding type synchronous motors (Wound Rotor Synchronous Motor: WRSM) which can replace Permanent Magnet Synchronous Motors (PMSM) are being developed recently as power sources for environmentally friendly automobiles.
The wound rotor synchronous motor winds a coil not only around a stator but also around a rotor, and electromagnetically converts the rotor when a current is applied, thereby replacing permanent magnets of a Permanent Magnet Synchronous Motor (PMSM).
In such a wound rotor synchronous motor, a rotor is provided with a certain gap inside a stator, a magnetic field is formed when a power is applied to coils of the stator and the rotor, and rotation of the rotor is achieved by a magnetic action generated therebetween.
On the other hand, in the course of the high-speed rotation of the drive motor such as the permanent magnet synchronous motor or the wound rotor synchronous motor, high-temperature heat is generated around the rotor and the coil.
Meanwhile, due to such heat generated at the rotor and the coil part, the driving motor may be deteriorated in efficiency and internal parts due to power loss. Accordingly, various forms of cooling techniques are being studied and proposed in order to prevent this.
As shown in fig. 1, fig. 1 is a schematic diagram of a rotor cooling structure of a conventional driving motor. The rotating shaft 11 of the rotor 10 has a closed hollow structure at one end in the length direction, and a supply pipe (20: cooling pipe) for supplying a cooling fluid is provided inside the rotating shaft 11, which is a way of providing a cooling function to the rotor 10.
However, in order to press the supply pipe 20 of the cooling fluid into the cooling jacket (30: cooling jacket) with respect to the rotor cooling structure of these conventional driving motors, it is necessary to precisely process the outer diameter of the supply pipe 20 and the inner diameter of the cooling jacket 30, and at the same time, it is necessary to perform a process of hot/cold pressing the precisely processed supply pipe 20 into the cooling jacket 30. In addition, an additional introduction tube (40: inlet tube) is required.
It is added that the conventional rotor cooling structure of the driving motor is a structure for installing the supply pipe 20 of the cooling fluid and the installation process thereof is complicated and complicated.
Disclosure of Invention
In view of the shortcomings of the prior art, it is an object of the present invention to provide a rotor cooling structure for a driving motor, which is capable of forming an integrated cooling fluid supply pipe in a form of being installed inside and outside a hollow shaft of the driving motor, and installing the cooling fluid supply pipe inside the shaft and outside a cooling jacket, wherein the cooling fluid supply pipe is assembled only by using a connection means such as bolts, and is installed on the shaft and the cooling jacket by a relatively easy and simple process, thereby improving the assemblability.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the embodiment of the invention provides a rotor cooling structure of a driving motor, wherein a rotor of the driving motor comprises a hollow rotating shaft and a rotor cooling structure of a rotor core combined with the rotating shaft, a through hole communicated with the inside of the rotating shaft is formed, the through hole is connected with the inside of the rotating shaft, and the through hole is connected with the inside of the rotating shaft and the outside of a cooling cover through the through hole to form an integrated pipe structure. It may include a cooling supply pipe through which the cooling fluid supplied from one end outside the cooling jacket is discharged into the rotating shaft through the other end inside the rotating shaft, and a connection means for fixing the cooling supply pipe to the cooling jacket.
In addition, the cooling fluid supply pipe may include a first pipe extending from the through-hole inlet to a predetermined position in the rotating shaft, a second pipe extending in a circular shape from one end of the through-hole inlet of the first pipe, and a third pipe extending from one end of the second pipe toward the first pipe and the vertical direction.
In addition, the cooling fluid supply pipe may be formed by bending a predetermined portion of a single pipe, and the first pipe and the second pipe may be formed on both sides of the second pipe while the second pipe is formed, or may be formed by bending a predetermined portion of a pipe, and one end of the second pipe may be combined with the third pipe.
The beneficial effects of the invention are as follows:
the cooling fluid supply pipe which can be installed inside and outside the hollow rotating shaft of the driving motor provided by the embodiment of the invention can be assembled only by using the connecting devices such as the bolts and the like, and can be installed inside the rotating shaft and outside the cooling cover, so that the driving motor is relatively easy to install the cooling structure of the rotor, the cooling fluid supply pipe can be realized through a simple process, and the assembly performance is obviously improved.
Drawings
FIG. 1 is a schematic diagram of a rotor cooling structure of a prior art drive motor;
fig. 2 is a schematic diagram of a rotor cooling structure of a drive motor according to one or more embodiments of the present invention.
Wherein 10, rotor, 11, spindle, 20, supply tube, 30, cooling cover, 40, lead-in tube;
100. rotor 110, rotating shaft 200, cooling cover 210, through hole 300, cooling fluid supply pipe 310, first pipeline 320, second pipeline 330, third pipeline 400, and connecting device.
Detailed Description
Embodiment one:
the following detailed description of the invention is exemplary of possible implementations of the invention and is presented in terms of the examples of implementations with reference to the accompanying drawings. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It is to be understood that the various embodiments of the invention are different and need not be mutually exclusive. For example, the specific shape, structure, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention. In addition, it is to be understood that the location or arrangement of individual elements within each illustrated embodiment may be modified without departing from the spirit and scope of the invention.
The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. Like reference symbols in the various drawings indicate the same or similar functionality.
The terms used in the present invention select general terms widely used at present as much as possible while considering the functions of the present invention, which may be different according to the intention of those working in the field, cases, or the appearance of new technologies. In addition, in some cases, there are also terms arbitrarily selected by the applicant, and in this case, the meaning thereof will be explained in detail in the explanation section of the present invention. Accordingly, the terms used in the present invention are not simple term names, but are defined based on the meaning of the terms and the overall content of the invention.
In the present invention, when some of the components in the whole are "included", this means that other components may be included, without excluding other components, unless the contrary is stated. In addition, the terms "… portion", "… module" and the like in the specification refer to at least a unit of processing one function or action, which may be implemented by hardware or software, or may be implemented by a combination of hardware and software.
The present embodiment provides a rotor cooling structure of a driving motor, as shown in fig. 2, which includes a cooling cover 200, a cooling fluid supply pipe 300, and a connection device 400.
That is, the rotor 100 is a rotor of a drive motor, and these rotors 100 include a hollow shaft 110 and a rotor core (not shown) coupled to the shaft 110, and the cooling structure in this example is a structure of the rotor 100 of these drive motors. In the present embodiment, the hollow structure in which the rotary shaft 110 is closed at one end in the longitudinal direction is taken as an example, but the present invention is not limited thereto.
The cooling cover 200 forms a through hole 210 to communicate with the inside of the rotating shaft 110, connects the through holes 210 with the inside of the rotating shaft 110, and is coupled to the rotating shaft 110.
The cooling fluid supply pipe 300 is an integrated pipe structure mounted inside the rotation shaft 110 and outside the cooling jacket 200 through the through-hole 210 of the cooling jacket 100. The cooling fluid supply pipe 300 functions to supply the cooling fluid from one end outside the cooling jacket 100 and discharge the cooling fluid into the rotating shaft 110 through the other end inside the rotating shaft 110. The supply of the cooling fluid to the inside of the rotating shaft 110 is indicated by arrows in the drawing, and the movement path of the cooling fluid thus supplied into the rotating shaft 110 is recovered to the outside of the rotating shaft 110 by the cooling action.
Further, the cooling fluid supply pipe 300 includes a first pipe 310 extending from an inlet of the through hole 210 of the cooling jacket 200 to a predetermined position in the rotating shaft 110, a second pipe 320 extending from an inlet end of the through hole 110 of the first pipe 310 to be circular, and a third pipe 330 extending from an end of the second pipe 320 in a direction perpendicular to the first pipe 310.
In addition, the cooling fluid supply pipe 300 may be a single pipe in which a predetermined portion is bent to form the second pipe 320, and the first pipe 310 and the second pipe 320 are formed at both sides with the bent second pipe 320 as a center.
In another embodiment, a predetermined portion of the pipe of the cooling fluid supply pipe 300 is bent to form one end of the second pipe 320 bent by the first pipe 310 and the second pipe 320, and the third pipe 330 may be joined by welding or the like.
The connection device 400 has a function of connecting the cooling fluid supply pipe 300 to the cooling jacket 200, and can be implemented in various forms by the disclosed technique such as a structure using bolts. Therefore, in this embodiment, a specific description and illustration thereof are omitted.
Note that the reference numeral 500 is not given to a seal designed to prevent leakage of the cooling fluid flowing into the cooling jacket 200 after the cooling action in the rotating shaft 110.
According to the above-described configuration, the integrated cooling fluid supply pipe 300 may be installed inside and outside the hollow rotating shaft 110, and installed inside the rotating shaft 110 and outside the cooling jacket 200. The cooling fluid supply pipe 300 is installed on the rotation shaft 110 and the cooling jacket 200 through a relatively easy process by only an assembling process using a connection means such as a bolt.
That is, the mounting structure of the driving motor to the cooling structure of the rotor 100 is simplified, and thus the mounting work of the rotor having the corresponding cooling structure can be easily performed.
In addition, according to the present example, in the rotor cooling structure of the conventional driving motor, a precision machining process for the outer diameter of the supply pipe and the inner diameter of the cooling jacket, while requiring cold/hot press-fitting, may be omitted in order to insert one end of the supply pipe of the cooling fluid into the cooling jacket in a state of close contact.
In addition, the step of bonding the cooling jacket may be omitted in the case where a separate introduction pipe (inlet pipe) is connected to one end of the supply pipe for supplying the cooling fluid to the one end of the supply pipe.
While the present invention has been described with reference to specific matters such as specific components and limited examples of embodiments and drawings, this is only to assist in a more complete understanding, and the present invention is not limited to the examples of embodiments, and various modifications and changes may be made from these descriptions by those skilled in the art to which the present invention pertains.
The inventive idea should therefore not be limited to the described embodiments, but the claims and everything equivalent or equivalent thereto fall within the scope of the inventive idea.
Claims (3)
1. The rotor cooling structure of the driving motor is characterized in that a through hole connected with the inside of a rotating shaft is formed in the rotor cooling structure of the driving motor, wherein the rotor cooling structure comprises a hollow rotating shaft and a rotor core combined with the rotating shaft, and the through hole is connected with the inside of the rotating shaft to form a cooling cover combined with the rotating shaft; a cooling fluid supply pipe for discharging one end cooling fluid outside the cooling cover to the rotating shaft through the other end inside the rotating shaft by an integral pipe structure installed inside the rotating shaft and outside the cooling cover through the through hole; the rotor cooling structure includes a connection means for connecting the cooling fluid supply pipe to the cooling jacket, the connection means simultaneously mounting the cooling fluid supply pipe inside the rotating shaft and outside the cooling jacket by using bolts.
2. The rotor cooling structure of a drive motor according to claim 1, wherein the cooling fluid supply pipe includes a first pipe extending from the through-hole inlet to a predetermined position in the rotating shaft, a second pipe extending in a circular shape from one end of the through-hole inlet of the first pipe, and a third pipe extending in the first pipe and the vertical direction from one end of the second pipe.
3. The structure according to claim 2, wherein the cooling fluid supply pipe is formed by bending a predetermined portion of a single pipe, and the second pipe is formed by bending the predetermined portion of the pipe, and wherein the first pipe and the second pipe are formed on both sides of the second pipe with the bent second pipe as a center, or the first pipe and the second pipe are formed by bending the predetermined portion of the pipe, and one end of the bent second pipe is connected to the third pipe.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2019-0140796 | 2019-11-06 | ||
| KR1020190140796A KR102238301B1 (en) | 2019-11-06 | 2019-11-06 | Cooling structure of Rotor for driven motor |
| PCT/KR2020/014862 WO2021091158A1 (en) | 2019-11-06 | 2020-10-29 | Cooling structure for rotor of drive motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114631248A CN114631248A (en) | 2022-06-14 |
| CN114631248B true CN114631248B (en) | 2024-04-05 |
Family
ID=75444085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080074064.XA Active CN114631248B (en) | 2019-11-06 | 2020-10-29 | Cooling structure of driving motor rotor |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR102238301B1 (en) |
| CN (1) | CN114631248B (en) |
| WO (1) | WO2021091158A1 (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0946973A (en) * | 1995-07-28 | 1997-02-14 | Nikkiso Co Ltd | Rotor cooling construction for motor |
| JP2009148047A (en) * | 2007-12-12 | 2009-07-02 | Sugai Sogyo:Kk | Motor cooling system |
| KR20140004313A (en) * | 2012-07-02 | 2014-01-13 | 현대모비스 주식회사 | Cooling structure for motor rotator |
| CN206742982U (en) * | 2015-09-30 | 2017-12-12 | 西门子公司 | Generator |
| CN207311074U (en) * | 2017-08-14 | 2018-05-04 | 中能绿驰成都汽车科技有限公司 | A kind of integral type drive system for electric automobile |
| CN109067092A (en) * | 2018-08-28 | 2018-12-21 | 华中科技大学 | A kind of rotor cooling structure |
| KR20190015509A (en) * | 2016-06-07 | 2019-02-13 | 테슬라, 인크. | Electric motor waste heat mode to heat the battery |
| CN110022034A (en) * | 2019-03-11 | 2019-07-16 | 华中科技大学 | A kind of motor and the integrated cooling oil path system of drive control device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105379080A (en) * | 2013-07-19 | 2016-03-02 | 株式会社东芝 | Liquid-cooled electric motor |
| KR101913597B1 (en) * | 2017-04-14 | 2018-10-31 | 주식회사 맥시스 | Motor for electric vehicles |
-
2019
- 2019-11-06 KR KR1020190140796A patent/KR102238301B1/en active IP Right Grant
-
2020
- 2020-10-29 CN CN202080074064.XA patent/CN114631248B/en active Active
- 2020-10-29 WO PCT/KR2020/014862 patent/WO2021091158A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0946973A (en) * | 1995-07-28 | 1997-02-14 | Nikkiso Co Ltd | Rotor cooling construction for motor |
| JP2009148047A (en) * | 2007-12-12 | 2009-07-02 | Sugai Sogyo:Kk | Motor cooling system |
| KR20140004313A (en) * | 2012-07-02 | 2014-01-13 | 현대모비스 주식회사 | Cooling structure for motor rotator |
| CN206742982U (en) * | 2015-09-30 | 2017-12-12 | 西门子公司 | Generator |
| KR20190015509A (en) * | 2016-06-07 | 2019-02-13 | 테슬라, 인크. | Electric motor waste heat mode to heat the battery |
| CN207311074U (en) * | 2017-08-14 | 2018-05-04 | 中能绿驰成都汽车科技有限公司 | A kind of integral type drive system for electric automobile |
| CN109067092A (en) * | 2018-08-28 | 2018-12-21 | 华中科技大学 | A kind of rotor cooling structure |
| CN110022034A (en) * | 2019-03-11 | 2019-07-16 | 华中科技大学 | A kind of motor and the integrated cooling oil path system of drive control device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114631248A (en) | 2022-06-14 |
| WO2021091158A1 (en) | 2021-05-14 |
| KR102238301B1 (en) | 2021-04-09 |
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