CN109510401A - Cooling water channel and its manufacturing method, the external rotor electric machine and its cooling system of external rotor electric machine - Google Patents
Cooling water channel and its manufacturing method, the external rotor electric machine and its cooling system of external rotor electric machine Download PDFInfo
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- CN109510401A CN109510401A CN201811300962.3A CN201811300962A CN109510401A CN 109510401 A CN109510401 A CN 109510401A CN 201811300962 A CN201811300962 A CN 201811300962A CN 109510401 A CN109510401 A CN 109510401A
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- electric machine
- external rotor
- inner casing
- water
- rotor electric
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- 239000000498 cooling water Substances 0.000 title claims abstract description 51
- 238000001816 cooling Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 230000007704 transition Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000002826 coolant Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The cooling water channel of external rotor electric machine, the external rotor electric machine acted on include stator core, electric motor end cap, inner casing；Inner casing, which fits closely, to be mounted on the inside of the stator core of external rotor electric machine, and water channel is arranged in inner casing；Water channel is reentrant type, and the axial direction along external rotor electric machine is distributed layer by layer, and the both ends of water channel are equipped with axial inlet segment, water exit end；Inlet segment, water exit end port be respectively water inlet, water outlet；The same end of external rotor electric machine is arranged in water inlet, water outlet；Water inlet, water outlet be provided with water inlet tap, faucet on electric motor end cap at one end, connect respectively with water inlet, water outlet.Further relate to manufacturing method, external rotor electric machine and its cooling system of the cooling water channel of external rotor electric machine.Belong to motor thermal control technical field.Make in the external rotor electric machine work with the cooling water channel or cooling system that temperature rise is small, uniform temperature is good, and temperature control energy consumption is smaller.
Description
Technical field
The invention belongs to the cooling water channel and its manufacturing method of motor thermal control technical field more particularly to external rotor electric machine,
External rotor electric machine and its cooling system with the cooling water channel.
Background technique
Currently, energy shortage and pollution problem are to influence the significant problem of China's development, and new-energy automobile is to alleviate this
The important tool of two large problems, New energy automobile motor are an important factor for influencing new-energy automobile performance and its development.In order to
Meeting high power density, the research and development demand of light-weighted requirement, external rotor electric machine is increasingly strong, but as higher power is close
Degree requires, and the unit volume thermic load of external rotor electric machine is increasing, so that motor generates excessive temperature rise, leads to the property of motor
It can be with service life decline.So the research of the temperature control technology of motor is particularly critical, water-cooled cooling system is imitated with good heat dissipation
Fruit is the effective technology for controlling motor temperature rise.But the water channel of water-cooled cooling system really have that temperature rise is excessively high or pressure drop too
Big disadvantage.
The cooling water channel structure of water-cooled machine mainly has two kinds of forms of screw type and reentrant type.Although screw type channel structure
Inlet and outlet with lesser droop loss, but its water channel are distributed in the rear and front end of motor, before leading to motor
Both ends form biggish temperature gradient afterwards, are unfavorable for the temperature rise control of motor entirety.Although the setting of reentrant type channel structure than
Relatively flexibly, but the setting of existing reentrant type channel structure is not reasonable；The uniform temperature that cannot guarantee motor well, is also not easy to
The arrangement of integral water-cooled system；In addition the number changed required for its water route direction is more, there is a problem of that pressure drop is larger, needs
More energy consumption.
Summary of the invention
For the technical problems in the prior art, the first purpose of this invention is: providing the cold of external rotor electric machine
But water channel, cooling system；The temperature rise of external rotor electric machine can be efficiently controlled, and guarantees the uniform temperature of external rotor electric machine；Also provide
The manufacturing method of the cooling water channel of external rotor electric machine, the heat for generating external rotor electric machine more efficiently conduct cold in waste supply canal
But medium.
Another object of the present invention is: providing the external rotor electric machine that temperature rise is smaller, energy consumption needed for temperature control is less.
In order to achieve the above object, the present invention adopts the following technical scheme:
The cooling water channel of external rotor electric machine, the external rotor electric machine acted on include stator core, electric motor end cap, interior machine
Shell；Inner casing, which fits closely, to be mounted on the inside of the stator core of external rotor electric machine, and water channel is arranged in inner casing: water channel is to turn back
Type, the axial direction along external rotor electric machine are distributed layer by layer, and the both ends of water channel are equipped with axial inlet segment, water exit end；Inlet segment, water exit end
Port be respectively water inlet, water outlet；The same end of external rotor electric machine is arranged in water inlet, water outlet；Water inlet, water outlet
Be provided with water inlet tap, faucet on electric motor end cap at one end, connect respectively with water inlet, water outlet.Using this structure
Afterwards, the temperature rise of external rotor electric machine can be efficiently controlled, and guarantees the uniform temperature of external rotor electric machine, is conducive to external rotor electric machine performance
Optimum performance facilitates the arrangement of whole cooling system.
As a preference, the width of adjacent layer water channel is unequal, each slice width degree is distributed in the rule of " size size ".It adopts
After this structure, so that cooling water generates entrance effect between every layer of water channel, turbulivity is improved to improve heat exchange
Efficiency.
As a preference, water channel corner is round-corner transition；The radius R of fillet chooses according to the width of water channel；The choosing of R
Taking range is 10mm≤R≤20mm.After this structure, so that cooling water is stablized transition, reduce pressure loss, and eliminate stream
Dynamic dead zone.
As a preference, the transition of the joint of water inlet and water inlet tap, water outlet and faucet joint is all light
Sliding arc transition.After this structure, so that cooling water is stablized transition, reduce pressure loss, and eliminate flow dead zone.
As a preference, axial number of plies N, the channel width L and water channel height h of reentrant type water channel are according to external rotor electric machine
Stator dimensions be adjusted；Wherein, the selection range of axial number of plies N is 2≤N≤5, N round numbers；The selection of water channel height h
Range is 6mm≤h≤9mm.After this structure, it is suitable for the external rotor electric machine of different model, takes the optimal axial number of plies
Optimal heat transfer coefficient and droop loss are obtained with width.
As a preference, inner casing includes inner casing main body, inner casing lid；Tongue is distributed in inner casing main body, it is interior
Chassis body and the fixation of inner casing lid are closed into an entirety, and the tongue in inner casing main body is by inner casing main body and inner casing lid
It is closed the space formed and is divided into water channel.After this structure, water is designed by the position of tongue on design inner casing
Road structure, structure is simple, easily manufactured.
As a preference, what the tongue and inner casing main body in inner casing main body were integrated.It is interior after this structure
Casing and the tongue for constituting water channel can be integrally formed during fabrication, avoid generating thermal contact resistance, the heat for generating external rotor electric machine
Measure it is more efficient be transmitted to cooling medium, heat is taken out of by cooling medium.
The cooling system of external rotor electric machine, including water pump, cooling water tank, the cooling water channel containing the external rotor electric machine
Inner casing；Water channel in inner casing connects into cooling water circulation through water inlet tap, faucet and the cooling water tank on electric motor end cap
The cooling line of flowing；Water pump is arranged in cooling line as the power source of cooling water.After this structure, in outer rotor
When motor works, the water of cooling water tank enters in the water channel in inner casing from the water inlet of water channel, followed by each section of water channel,
With inner casing forced-convection heat transfer, the heat generated in external rotor electric machine work is taken away, then flows out inner casing through water outlet, is returned to
Cooling water tank forms a circulation loop；So effectively temperature rise of control external rotor electric machine, is conducive to external rotor electric machine and plays most
Best performance.
External rotor electric machine with above-mentioned cooling water channel；Energy consumption needed for the smaller temperature control of temperature rise is less, and performance is more stable, the service life
It is longer.
The manufacturing method of external rotor electric machine cooling water channel: the one when tongue in inner casing main body and inner casing main body manufactures
Molding, obtains the inner casing main body with tongue；Later, inner casing main body and inner casing lid pass through welded closed into an interior machine
Shell is whole, and wherein the top of tongue welds together with inner casing lid；Wherein inner casing inner cavity is divided to obtain reentrant type by tongue
The two ends of water channel, reentrant type water channel are not closed, and there are water inlet, the water outlets with external communication.After in this way, subtract
Few thermal contact resistance, the heat for generating external rotor electric machine are more efficiently transmitted to cooling medium.
To sum up, external rotor electric machine cooling water channel, the cooling system in the present invention have the advantages that high heat transfer is imitated
Rate, low pressure drop loss can control the temperature rise of external rotor electric machine under lesser pressure drop loss, and can guarantee the equal of external rotor electric machine
Warm nature；The manufacturing method of external rotor electric machine cooling water channel can reduce the thermal contact resistance generated in manufacturing process, make external rotor electric machine
The heat of generation it is more efficient be transmitted to cooling medium；External rotor electric with cooling water channel or cooling system in the present invention
Machine, temperature rise is smaller, and performance is more stable, adapts to the requirement of new-energy automobile.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the cooling water channel of external rotor electric machine in embodiment.
Fig. 2 is the main view of inner casing main body in embodiment.
Fig. 3 is the structural schematic diagram of inner casing in embodiment.
It is as shown in the figure:
1- inner casing main body；2- inner casing lid；3- water channel；4- tongue；5 water inlets；6- water outlet；7- inner casing is whole；
The width of L1- first layer water channel；The width of L2- second layer water channel；The width of L3- third layer water channel；H- water channel height；D- tongue
Width.
Specific embodiment
Below in conjunction with specific embodiment, the present invention will be further described in detail.
Embodiment one
The cooling water channel of external rotor electric machine, is arranged in the inner casing of external rotor electric machine；Inner casing is mounted on external rotor electric
It is fitted closely inside the stator core of machine and with stator core.
Inner casing includes inner casing main body, inner casing lid；Inner casing main body and the material of inner casing lid are all aluminium alloy；It is interior
It is distributed with tongue on chassis body, when manufacture is integrally formed；Inner casing main body is whole at one by welded closed with inner casing lid
Body；It is channel structure that inner casing main body is formed by cavity in conjunction with inner casing lid, i.e., the tongue in inner casing main body is interior machine
The space that shell main body and inner casing lid are closed is divided into each layer water channel；Wherein the two ends of water channel are not closed, there are with outside
Water inlet, the water outlet of connection.Channel structure is reentrant type, and the axial direction along external rotor electric machine is distributed layer by layer；The both ends of water channel are set
There are axial inlet segment, water exit end；Inlet segment, water exit end port be respectively water inlet, water outlet；Water channel corner is fillet
The size of transition, radius of corner is chosen according to the width of water channel；It is unequal per two layers adjacent of channel width, it is in " size
The rule distribution of size ".
Water inlet, the water outlet of channel structure are located at the same end of electric motor end cap, respectively with the water inlet tap of electric motor end cap, go out
Water nozzle connects, and transient mode is smooth arc transition.Inlet and outlet are after external rotor electric machine in the present embodiment
End cover side connects with the water inlet tap of rear end cap, faucet.
Number of plies N, channel width L and the height h of water channel are adjusted according to the stator dimensions two of external rotor electric machine.This implementation
The axial length of the external rotor electric machine of example is 80mm, and the number of plies N of water channel is 3 layers, and water channel height is 8mm, the width of first layer water channel
Degree L1 is 25mm, and the width of second layer water channel is that L2 is 21mm, and the width L3 of third layer water channel is 25mm, in " size size "
Rule distribution；The radius R of the knuckle of water channel corner is 20mm, and corresponding tongue width d is 6mm.
When water flowing is cooling, the path of cooling water are as follows: as shown in Fig. 2, cooling water flows into water channel from water inlet 5, first through intaking
Section flows to the left end of first layer water channel, flows under the guiding of first layer water channel to the left side, and the circumference one around inner casing encloses, and arrives
Up to the right end of water channel first layer, turns back and reaches the left end of the water channel second layer around the circumference of inner casing into second layer water channel,
It is turned back again into third layer water channel, the water exit end of water channel is finally flowed into the right end of third layer water channel, flowed out from water outlet 6.
The manufacturing method of the cooling water channel of above-mentioned external rotor electric machine: tongue is designed on interior chassis body, is divided by tongue
Inner casing inner cavity obtains reentrant type water channel, and inner casing main body is integrally formed when manufacturing with the tongue in inner casing main body；Had
After having the inner casing main body of tongue, by inner casing main body and inner casing lid by welded closed at an inner casing entirety,
The top of middle tongue welds together with inner casing lid；The two ends of reentrant type water channel do not close, there are with external communication into
The mouth of a river, water outlet.
Embodiment two
External rotor electric machine, including stator core, electric motor end cap, inner casing；It is provided on inner casing described in embodiment one
The cooling water channel of external rotor electric machine；Water inlet tap, water outlet are provided on the water inlet of water channel, the electric motor end cap at water outlet place end
Mouth connects with water inlet, water outlet respectively.
External rotor electric machine cooling system including water pump, cooling water tank, contains the cold of external rotor electric machine described in embodiment one
But the inner casing of water channel；Inner casing is fitted closely and is mounted on the inside of the stator core of external rotor electric machine, water outlet, water inlet
Connect respectively with water inlet tap, the faucet on the rear end cap of external rotor electric machine, and is connected into cooling line with cooling water tank；Water pump
It is arranged in cooling line.In external rotor electric machine work, water pump drives the water of cooling water tank to enter from the water inlet of water channel
In water channel in inner casing, takes away in external rotor electric machine work and produce with inner casing forced-convection heat transfer followed by each section of water channel
Raw heat, then inner casing is flowed out through water outlet, cooling water tank is returned to, a circulation loop is formed.Cooling water is in this circulation
In circuit, continues and inner casing exchanges heat, take away generated heat in external rotor electric machine work, reach control external rotor electric machine temperature
The purpose risen.
Remaining does not refer to part with embodiment one.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (10)
1. the cooling water channel of external rotor electric machine, the external rotor electric machine acted on includes stator core, electric motor end cap, inner casing；
Inner casing, which fits closely, to be mounted on the inside of the stator core of external rotor electric machine, and water channel is arranged in inner casing；It is characterized by: water
Road is reentrant type, and the axial direction along external rotor electric machine is distributed layer by layer, and the both ends of water channel are equipped with axial inlet segment, water exit end；Water inlet
Section, water exit end port be respectively water inlet, water outlet；The same end of external rotor electric machine is arranged in water inlet, water outlet；Water inlet
Mouthful, on water outlet institute electric motor end cap at one end provided with water inlet tap, faucet, connect respectively with water inlet, water outlet.
2. the cooling water channel of external rotor electric machine described in accordance with the claim 1, it is characterised in that: the width of adjacent layer water channel not phase
Deng, each slice width degree in the rule distribution of " size size ".
3. the cooling water channel of external rotor electric machine described in accordance with the claim 1, it is characterised in that: water channel corner is fillet mistake
It crosses；The selection range of radius of corner R is 10mm≤R≤20mm.
4. the cooling water channel of external rotor electric machine described in accordance with the claim 1, it is characterised in that: the water inlet and water inlet tap of water channel
The transition of joint, water outlet and faucet joint be all smooth arc transition.
5. the cooling water channel of external rotor electric machine described in accordance with the claim 1, it is characterised in that: the choosing of the axial number of plies N of water channel
Taking range is 2≤N≤5, N round numbers；The selection range of water channel height h is 6mm≤h≤9mm.
6. the cooling water channel of external rotor electric machine described in accordance with the claim 1, it is characterised in that: inner casing includes inner casing master
Body, inner casing lid；It is distributed with tongue in inner casing main body, inner casing main body and inner casing lid is affixed is closed into an entirety is interior
The space of inner casing main body and the be closed formation of inner casing lid is divided into each layer water channel by the tongue on chassis body.
7. the cooling water channel of external rotor electric machine according to claim 6, it is characterised in that: tongue in inner casing main body with
Inner casing main body is integrated.
8. the cooling system of external rotor electric machine, it is characterised in that: including water pump, cooling water tank, containing any in claim 1-7
The inner casing of the cooling water channel of external rotor electric machine described in one；Water channel in inner casing through on electric motor end cap water inlet tap, go out
Water nozzle and cooling water tank connect into the cooling line that cooling water circulates；Water pump is arranged as the power source of cooling water in cooling
In pipeline.
9. external rotor electric machine, it is characterised in that: the cooling water with external rotor electric machine of any of claims 1-7
Road.
10. the manufacturing method of external rotor electric machine cooling water channel, it is characterised in that: external rotor electric described in manufacturing claims 6 or 7
Machine cooling water channel: inner casing main body is integrally formed when manufacturing with the tongue in inner casing main body, obtains the inner casing with tongue
After main body, by inner casing main body and inner casing lid by welded closed at an inner casing entirety, wherein the top of tongue with
Inner casing lid welds together；Inner casing inner cavity is divided to obtain reentrant type water channel by tongue, and the two ends of reentrant type water channel are not sealed
It closes, there are water inlet, the water outlets with external communication.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811300962.3A CN109510401A (en) | 2018-11-02 | 2018-11-02 | Cooling water channel and its manufacturing method, the external rotor electric machine and its cooling system of external rotor electric machine |
| PCT/CN2019/113453 WO2020088376A1 (en) | 2018-11-02 | 2019-10-25 | Cooling water channel of external rotor motor and manufacturing method therefor, external rotor motor and cooling system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811300962.3A CN109510401A (en) | 2018-11-02 | 2018-11-02 | Cooling water channel and its manufacturing method, the external rotor electric machine and its cooling system of external rotor electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109510401A true CN109510401A (en) | 2019-03-22 |
Family
ID=65747432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811300962.3A Pending CN109510401A (en) | 2018-11-02 | 2018-11-02 | Cooling water channel and its manufacturing method, the external rotor electric machine and its cooling system of external rotor electric machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109510401A (en) |
| WO (1) | WO2020088376A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020088376A1 (en) * | 2018-11-02 | 2020-05-07 | 华南理工大学 | Cooling water channel of external rotor motor and manufacturing method therefor, external rotor motor and cooling system thereof |
| WO2022041211A1 (en) * | 2020-08-31 | 2022-03-03 | 舍弗勒技术股份两合公司 | Cooling jacket and motor |
| CN115085443A (en) * | 2022-07-15 | 2022-09-20 | 哈尔滨理工大学 | Motor cooling system |
| CN118282131A (en) * | 2024-05-31 | 2024-07-02 | 陕西汉德车桥有限公司 | Cooling structure of driving motor and driving motor |
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| CN206834901U (en) * | 2017-06-29 | 2018-01-02 | 长城汽车股份有限公司 | Motor case with cooling water channel |
| CN209119984U (en) * | 2018-11-02 | 2019-07-16 | 华南理工大学 | Cooling water channel, external rotor electric machine and its cooling system of external rotor electric machine |
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| JP2718581B2 (en) * | 1991-07-05 | 1998-02-25 | ファナック株式会社 | Liquid cooling means for electric motor and method of manufacturing the same |
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- 2018-11-02 CN CN201811300962.3A patent/CN109510401A/en active Pending
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| CN102780314A (en) * | 2012-07-11 | 2012-11-14 | 中国科学院宁波材料技术与工程研究所 | Direct drive type outer rotor rotation driving device |
| US20140246931A1 (en) * | 2013-03-04 | 2014-09-04 | Remy Technologies, Llc | Liquid-cooled rotary electric machine having fluid channel with auxiliary coolant groove |
| CN206834901U (en) * | 2017-06-29 | 2018-01-02 | 长城汽车股份有限公司 | Motor case with cooling water channel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020088376A1 (en) * | 2018-11-02 | 2020-05-07 | 华南理工大学 | Cooling water channel of external rotor motor and manufacturing method therefor, external rotor motor and cooling system thereof |
| WO2022041211A1 (en) * | 2020-08-31 | 2022-03-03 | 舍弗勒技术股份两合公司 | Cooling jacket and motor |
| CN115085443A (en) * | 2022-07-15 | 2022-09-20 | 哈尔滨理工大学 | Motor cooling system |
| CN118282131A (en) * | 2024-05-31 | 2024-07-02 | 陕西汉德车桥有限公司 | Cooling structure of driving motor and driving motor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020088376A1 (en) | 2020-05-07 |
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