CN113949188A - Rotor air-cooled permanent magnet motor and electric locomotive - Google Patents
Rotor air-cooled permanent magnet motor and electric locomotive Download PDFInfo
- Publication number
- CN113949188A CN113949188A CN202111234868.4A CN202111234868A CN113949188A CN 113949188 A CN113949188 A CN 113949188A CN 202111234868 A CN202111234868 A CN 202111234868A CN 113949188 A CN113949188 A CN 113949188A
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- stator
- rotor
- air
- channel
- permanent magnet
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- 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.)
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- 230000003137 locomotive effect Effects 0.000 title claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 210000001503 joint Anatomy 0.000 claims abstract description 6
- 239000000498 cooling water Substances 0.000 claims description 15
- 238000009423 ventilation Methods 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 5
- 239000000110 cooling liquid Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 108091006146 Channels Proteins 0.000 description 31
- 102000010637 Aquaporins Human genes 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 108010063290 Aquaporins Proteins 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 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
- 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
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary 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
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- 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
Abstract
The invention provides a rotor air-cooled permanent magnet motor.A stator shell is respectively provided with a stator air inlet channel and a stator air outlet channel, and an inner rotor is axially provided with a rotor cooling air channel in a through manner; two ends of the rotor cooling air passage are respectively in butt joint with and communicated with the stator air inlet passage and the stator air outlet passage and can be used for air to pass through; the inner rotor is fixedly provided with fan outer blades, when the fan outer blades work, the fan outer blades synchronously rotate along with the inner rotor, the fan outer blades drive air to flow, the air outside is driven to enter the stator air inlet channel, flows to the stator air outlet channel through the rotor cooling air channel and is discharged to the outside from the stator air outlet channel; the external cooling air flow is guided to pass through the inner rotor, absorbs the heat emitted by the inner rotor when passing through the inner rotor, and plays a role in cooling the inner rotor, so that the inner rotor realizes a better cooling effect. The electric locomotive related to the invention can realize the same technical effects.
Description
Technical Field
The invention relates to the field of motors, in particular to a rotor air-cooled permanent magnet motor. In addition, the invention also relates to an electric locomotive.
Background
The locomotive mainly passes through motor drive, needs cool off the motor, and in conventional technical scheme, the motor housing is provided with the cooling water course, mainly utilizes the coolant liquid to take away the inside heat of motor through the cooling water course.
The cooling structure can effectively realize the heat dissipation of the stator, but can not directly cool the rotor, the bearing and other parts in the permanent magnet motor, so that the heat in the motor can not be effectively dissipated, an isothermal body is easy to form, and the exertion of the power and the torque of the motor is limited.
For those skilled in the art, how to better cool the rotor of the motor is a technical problem to be solved at present.
Disclosure of Invention
The invention provides a rotor air-cooled permanent magnet motor, which leads external airflow to pass through an inner rotor, and has a better cooling effect on the inner rotor, and the specific scheme is as follows:
a rotor air-cooled permanent magnet motor comprises a stator shell, an inner rotor and a rotating shaft, wherein the inner rotor and the rotating shaft are circumferentially and relatively fixed, and the rotating shaft is rotatably connected to the stator shell through a bearing;
the stator shell is respectively provided with a stator air inlet channel and a stator air outlet channel, and the inner rotor is axially provided with a rotor cooling air channel in a through manner; two ends of the rotor cooling air passage are respectively in butt joint with and communicated with the stator air inlet passage and the stator air outlet passage;
the inner rotor is fixedly provided with outer fan blades, and the outer fan blades rotate along with the inner rotor to drive air to flow; and the outside gas enters the stator air inlet channel, flows to the stator air outlet channel through the rotor cooling air channel, and is discharged to the outside through the stator air outlet channel.
Optionally, the fan outer blades are located in the stator outlet duct.
Optionally, a stator separation plate is arranged on the inner wall of the stator housing, and a rotor separation plate is fixedly arranged on the inner rotor; the stator splitter plate is in rotational sealing contact with the inner rotor, and the rotor splitter plate is in rotational sealing contact with the stator housing;
the stator division board with the rotor division board will the inner chamber of stator shell is separated for inside circulation sealed chamber and outside ventilation chamber, and external air current can flow through outside ventilation chamber.
Optionally, the inner rotor is provided with inner fan blades, and the inner fan blades are positioned in the inner circulation sealed cavity; the inner blades of the fan rotate along with the inner rotor to enable the inner circulation sealing cavity to generate circulation airflow.
Optionally, the inner rotor is provided with a rotor circulation ventilation channel axially through, the rotor circulation ventilation channel is located in the internal circulation sealed cavity, the rotor circulation ventilation channel is right opposite to the fan inner blade, and the circulation airflow of the internal circulation sealed cavity passes through the rotor circulation ventilation channel.
Optionally, a stator circulation air duct is arranged on the inner wall of the stator housing, the stator circulation air duct is located between the stator core and the inner wall of the stator housing or is independently arranged on the stator core in a penetrating manner, and the circulation air flow of the internal circulation sealing cavity passes through the stator circulation air duct.
Optionally, the fan inner blade and the fan outer blade are both fixedly disposed on the rotor separation plate.
Optionally, a stator cooling water channel is arranged on the outer wall of the stator housing, and cooling liquid circulates in the stator cooling water channel to cool the stator housing.
Optionally, the stator cooling water channel is provided to a cover plate of the stator housing.
The invention also provides an electric locomotive which comprises the rotor air-cooled permanent magnet motor.
The invention provides a rotor air-cooled permanent magnet motor.A stator shell is respectively provided with a stator air inlet channel and a stator air outlet channel, and an inner rotor is axially provided with a rotor cooling air channel in a through manner; two ends of the rotor cooling air passage are respectively in butt joint with and communicated with the stator air inlet passage and the stator air outlet passage and can be used for air to pass through; the inner rotor is fixedly provided with fan outer blades, when the fan outer blades work, the fan outer blades synchronously rotate along with the inner rotor, the fan outer blades drive air to flow, the air outside is driven to enter the stator air inlet channel, flows to the stator air outlet channel through the rotor cooling air channel and is discharged to the outside from the stator air outlet channel; the external cooling air flow is guided to pass through the inner rotor, absorbs the heat emitted by the inner rotor when passing through the inner rotor, and plays a role in cooling the inner rotor, so that the inner rotor realizes a better cooling effect. The electric locomotive related to the invention can realize the same technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a cross-sectional view of a rotor air-cooled permanent magnet electric machine of the present invention taken along the axial direction;
fig. 2 is a partial structure diagram of the upper half of fig. 1.
The figure includes:
the stator cooling air-conditioning system comprises a stator shell 1, a stator air inlet 11, a stator air outlet 12, a stator partition plate 13, a stator circulating air duct 14, a stator cooling water channel 15, an inner rotor 2, a rotor cooling air duct 21, outer fan blades 22, a rotor partition plate 23, inner fan blades 24, a rotor circulating air duct 25 and a rotating shaft 3.
Detailed Description
The core of the invention is to provide a rotor air-cooled permanent magnet motor, which leads external airflow to pass through an inner rotor and has better cooling effect on the inner rotor.
In order to make those skilled in the art better understand the technical solution of the present invention, the rotor air-cooled permanent magnet motor and the electric locomotive of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The invention provides a rotor air-cooled permanent magnet motor, which comprises a stator shell 1, an inner rotor 2, a rotating shaft 3 and other structures, wherein the figure 1 is a sectional view of the rotor air-cooled permanent magnet motor along the axial direction, and the figure 2 is a partial structure schematic diagram of the upper half part of the figure 1. The inner rotor 2 and the rotating shaft 3 are circumferentially and relatively fixed, the rotating shaft 3 is rotatably connected to the stator housing 1 through a bearing, and the inner rotor 2 and the rotating shaft 3 can synchronously rotate relative to the stator housing 1. As shown in fig. 1, a stator core a is installed on a stator housing 1, a rotor core B is installed on an inner rotor 2, and when the stator housing is powered on, the stator core and the rotor core generate torque to drive the inner rotor 2 and a rotating shaft 3 to rotate to output power.
The stator shell 1 is respectively provided with a stator air inlet channel 11 and a stator air outlet channel 12, and the stator air inlet channel 11 and the stator air outlet channel 12 are respectively arranged on two opposite side walls and are respectively positioned at two ends of the inner rotor 2; two stator inlet ducts 11 and two stator outlet ducts 12 are shown in the figure, and it should be noted that the stator inlet ducts 11 and the stator outlet ducts 12 are distributed along the circumferential direction and are arranged in central symmetry along the circumferential direction. The inner rotor 2 is axially provided with a plurality of rotor cooling air passages 21 in parallel along the circumferential direction, and an independent axial channel structure is formed on the inner rotor 2.
Two ends of the rotor cooling air passage 21 are respectively in butt joint with and communicated with the stator air inlet passage 11 and the stator air outlet passage 12; the butt joint is not relatively fixed, when the rotor cooling air passage 21 is in operation, the inner rotor 2 rotates continuously, the rotor cooling air passage 21 is aligned and separated with the stator air inlet passage 11 and the stator air outlet passage 12 continuously, air flow is guided to pass through the inner rotor 2 in the rotation process, and the plurality of rotor cooling air passages 21 arranged on the inner rotor 2 are respectively guided to pass through the air flow.
The inner rotor 2 is fixedly provided with a fan outer blade 22, the fan outer blade 22 synchronously rotates along with the inner rotor 2, and the fan outer blade 22 drives air to flow when rotating, so that power of air flow movement is provided, and external air flow is introduced into the stator air inlet 11.
The outside air enters the stator air inlet channel 11, flows to the stator air outlet channel 12 through the rotor cooling air channel 21 and is discharged to the outside from the stator air outlet channel 12, and the flowing direction of the process air is shown by an arrow marked as (I) in the figure; the invention guides the outside air flow into the motor, and the air is forced to be supplied by the fan outer blade 22, and the outside cold air is heat exchanged with the heating device in the motor in the process of flowing through the motor, so that the heat generated by the inner rotor 2 is more efficiently taken out to the outside, and the temperature in the motor is kept lower.
On the basis of the above-described arrangement, the fan outer blades 22 of the present invention are located in the stator outlet duct 12, that is, the fan outer blades 22 are not completely exposed outside the stator casing 1.
The inner wall of stator housing 1 sets up stator division board 13, and inner rotor 2 is fixed to set up rotor division board 23, and stator division board 13 and rotor division board 23 are circumference respectively and arrange, and stator division board 13 and rotor division board 23 are located the both ends of inner rotor 2 respectively.
The stator splitter plate 13 is in rotary sealing contact with the inner rotor 2, and the rotor splitter plate 23 is in rotary sealing contact with the stator shell 1 to form rotary sealing contact; the stator partition plate 13 and the rotor partition plate 23 partition the inner cavity of the stator housing 1 into an internal circulation seal chamber and an external ventilation chamber through which external air can flow. Referring to fig. 1, the stator partition plate 13 encloses a portion of the side wall of the stator inlet duct 11, and the rotor partition plate 23 encloses a portion of the side wall of the stator outlet duct 12.
Specifically, the inner rotor 2 is provided with inner fan blades 24, and the inner fan blades 24 are positioned in an inner circulation sealed cavity; the inner blades 24 of the fan rotate along with the inner rotor 2 to enable the internal circulation sealing cavity to generate circulation airflow, the airflow in the internal circulation sealing cavity is not exchanged with the outside, the circulation flow is only carried out through the rotation of the inner blades 24 of the fan, and the flowing direction of the air in the internal circulation sealing cavity is shown by an arrow marked II in the figure; the air current outside each of internal circulation sealed chamber constantly circulates, makes the temperature of each position in internal circulation sealed chamber keep even, with heat transfer to stator housing 1's lateral wall, gives off to the external world through stator housing 1's lateral wall.
The rotor circulation air channel 25 is opposite to the fan inner blade 24, and the fan inner blade 24 generates a circulation air flow in the internal circulation sealed cavity, and the air flow passes through the rotor circulation air channel 25; the heat of the inner rotor 2 can be taken out through the rotor circulating ventilation channel 25 and transferred to the side wall of the stator shell 1 for heat dissipation.
The inner wall of the stator shell 1 is provided with a stator circulating air duct 14, and the stator circulating air duct 14 can adopt two setting modes, namely that the stator circulating air duct 14 is positioned between the stator core and the inner wall of the stator shell 1 and is formed by a gap between the stator core and the stator shell 1; the other type is arranged on the stator core independently, and the stator core is provided with channels which penetrate through along the two ends of the stator core along the axial direction to form a stator circulating air duct 14. A plurality of stator circulating air ducts 14 are arranged along the circumferential direction and are parallel to the axial direction of the rotating shaft 3; the circulating air flow of the internal circulating sealed cavity passes through the stator circulating air duct 14 and continuously circulates between the stator circulating air duct 14 and the rotor circulating air duct 25.
Specifically, the inner fan blade 24 and the outer fan blade 22 are both fixedly disposed on the rotor partition plate 23, and the inner fan blade 24 and the outer fan blade 22 are processed together when the rotor partition plate 23 is processed.
On the basis of any one of the technical schemes and the mutual combination thereof, the stator cooling water channel 15 is arranged on the outer wall of the stator shell 1, and cooling liquid circulates in the stator cooling water channel 15 to cool the stator shell 1; the stator cooling water channel 15 is arranged in a penetrating mode, water enters from one end of the stator cooling water channel, water exits from the other end of the stator cooling water channel, and the cooling rate of the stator shell 1 is accelerated through the continuously circulating flowing cooling liquid.
The stator cooling water channel 15 is arranged on a cover plate of the stator shell 1, the cover plate is provided with an interlayer, and a water inlet and a water outlet are both arranged on the outer surface of the cover plate and are respectively connected with a water pipe.
The invention also provides an electric locomotive which comprises the rotor air-cooled permanent magnet motor and can achieve the same technical effect. For other parts of the electric locomotive, please refer to the prior art, and the present invention is not described herein.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A rotor air-cooled permanent magnet motor is characterized by comprising a stator shell (1), an inner rotor (2) and a rotating shaft (3), wherein the inner rotor (2) and the rotating shaft (3) are circumferentially and relatively fixed, and the rotating shaft (3) is rotatably connected to the stator shell (1) through a bearing;
the stator shell (1) is respectively provided with a stator air inlet channel (11) and a stator air outlet channel (12), and the inner rotor (2) is axially provided with a rotor cooling air channel (21) in a through mode; two ends of the rotor cooling air passage (21) are respectively in butt joint with and communicated with the stator air inlet passage (11) and the stator air outlet passage (12);
the inner rotor (2) is fixedly provided with outer fan blades (22), and the outer fan blades (22) rotate along with the inner rotor (2) to drive air to flow; the outside gas enters the stator air inlet channel (11), passes through the rotor cooling air channel (21) and flows to the stator air outlet channel (12), and then the stator air outlet channel (12) is discharged to the outside.
2. A rotor air-cooled permanent magnet electric machine according to claim 1, wherein the fan outer blades (22) are located at the stator outlet duct (12).
3. The rotor air-cooled permanent magnet motor according to claim 2, wherein the inner wall of the stator housing (1) is provided with a stator partition plate (13), and the inner rotor (2) is fixedly provided with a rotor partition plate (23); the stator separation plate (13) is in rotary sealing contact with the inner rotor (2), and the rotor separation plate (23) is in rotary sealing contact with the stator shell (1);
stator division board (13) with rotor division board (23) will the inner chamber of stator shell (1) is separated for inside circulation sealed chamber and outside ventilation chamber, and external air current can flow through outside ventilation chamber.
4. A rotor air-cooled permanent magnet machine according to claim 3, characterized in that the inner rotor (2) is provided with inner fan blades (24), the inner fan blades (24) being located in the inner circulation seal chamber; the inner fan blades (24) rotate along with the inner rotor (2) to enable the inner circulation sealed cavity to generate circulation airflow.
5. The rotor air-cooled permanent magnet motor according to claim 4, characterized in that a rotor circulation ventilation channel (25) is axially arranged through the inner rotor (2), the rotor circulation ventilation channel (25) is located in the inner circulation sealed cavity, the rotor circulation ventilation channel (25) is opposite to the fan inner blade (24), and the circulation air flow of the inner circulation sealed cavity passes through the rotor circulation ventilation channel (25).
6. The rotor air-cooled permanent magnet motor according to claim 5, characterized in that a stator circulating air duct (14) is arranged on the inner wall of the stator housing (1), the stator circulating air duct (14) is arranged between the stator core and the inner wall of the stator housing (1) or is independently arranged on the stator core in a penetrating way, and the circulating air flow of the internal circulating sealed cavity passes through the stator circulating air duct (14).
7. The rotor air-cooled permanent magnet motor according to claim 6, wherein the fan inner blades (24) and the fan outer blades (22) are fixedly arranged on the rotor partition plate (23).
8. The rotor air-cooled permanent magnet motor according to any one of claims 1 to 7, characterized in that a stator cooling water channel (15) is arranged on the outer wall of the stator housing (1), and a cooling liquid circulates in the stator cooling water channel (15) to cool the stator housing (1).
9. The rotor air-cooled permanent magnet electric machine according to claim 8, wherein the stator cooling water channel (15) is provided to a cover plate of the stator housing (1).
10. An electric locomotive comprising a rotor air-cooled permanent magnet electric machine according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111234868.4A CN113949188A (en) | 2021-10-22 | 2021-10-22 | Rotor air-cooled permanent magnet motor and electric locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111234868.4A CN113949188A (en) | 2021-10-22 | 2021-10-22 | Rotor air-cooled permanent magnet motor and electric locomotive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113949188A true CN113949188A (en) | 2022-01-18 |
Family
ID=79332316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111234868.4A Pending CN113949188A (en) | 2021-10-22 | 2021-10-22 | Rotor air-cooled permanent magnet motor and electric locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113949188A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116455168A (en) * | 2023-06-16 | 2023-07-18 | 苏州百狮腾电气有限公司 | Permanent magnet direct-drive motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004187352A (en) * | 2002-11-29 | 2004-07-02 | Toshiba Corp | Totally enclosed motor for drive of vehicle |
| CN1848620A (en) * | 2005-03-23 | 2006-10-18 | 株式会社东芝 | Fully-enclosed fan-cooled motor |
| CN103166340A (en) * | 2011-12-15 | 2013-06-19 | 株式会社日立制作所 | Rotating electric machine, rail vehicle and electric vehicle equipped therewith |
| CN206712589U (en) * | 2017-05-12 | 2017-12-05 | 广东联塑机器制造有限公司 | A kind of air-cooled rotor motor of high efficiency and heat radiation |
| CN110768414A (en) * | 2019-09-26 | 2020-02-07 | 广州地铁集团有限公司 | Cooling structure of permanent magnet motor |
-
2021
- 2021-10-22 CN CN202111234868.4A patent/CN113949188A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004187352A (en) * | 2002-11-29 | 2004-07-02 | Toshiba Corp | Totally enclosed motor for drive of vehicle |
| CN1848620A (en) * | 2005-03-23 | 2006-10-18 | 株式会社东芝 | Fully-enclosed fan-cooled motor |
| CN103166340A (en) * | 2011-12-15 | 2013-06-19 | 株式会社日立制作所 | Rotating electric machine, rail vehicle and electric vehicle equipped therewith |
| CN206712589U (en) * | 2017-05-12 | 2017-12-05 | 广东联塑机器制造有限公司 | A kind of air-cooled rotor motor of high efficiency and heat radiation |
| CN110768414A (en) * | 2019-09-26 | 2020-02-07 | 广州地铁集团有限公司 | Cooling structure of permanent magnet motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116455168A (en) * | 2023-06-16 | 2023-07-18 | 苏州百狮腾电气有限公司 | Permanent magnet direct-drive motor |
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Application publication date: 20220118 |