CN105703541A - Motor cooling system - Google Patents
Motor cooling system Download PDFInfo
- Publication number
- CN105703541A CN105703541A CN201610152870.XA CN201610152870A CN105703541A CN 105703541 A CN105703541 A CN 105703541A CN 201610152870 A CN201610152870 A CN 201610152870A CN 105703541 A CN105703541 A CN 105703541A
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- China
- Prior art keywords
- cooling
- gas
- condensate cooler
- liquid tank
- casing
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- 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
- H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
A motor cooling system comprises a condensation cooler, a gas cooling loop and an evaporation cooling loop, wherein the gas cooling loop and the evaporation cooling loop are located in a sealed casing cavity, and the two loops are intersected in the condensation cooler; the condensation cooler is shared by the gas cooling loop and the evaporation cooling loop and is located outside the motor casing and is communicated with the casing cavity via a gas inlet and a gas outlet. The motor cooling system is applied to cooling of a large-power generator and a motor.
Description
Technical field
The present invention relates to a kind of cooling devcie of motor。
Background technology
The existing type of cooling of motor can be divided into two kinds, a kind of is that the specific heat capacity utilizing flowing gas or liquid takes away heat, such as types of cooling such as air cooling, hydrogen-cooled, water-cooled, oil coolings, wherein can be subdivided into again gas cooling (air cooling, hydrogen-cooled) according to the state of working medium and liquid cools down (water-cooled, oil cooling etc.)；Another kind is that the latent heat of phase change utilizing cooling working medium takes away heat, such as vapor cooling system。The heat absorbed when liquid undergoes phase transition is more much bigger than its heat taken away by specific heat。
Air cooling, the gas type of cooling such as hydrogen-cooled are stable because of its development time length, technical maturity, and range of application is the widest。The version of existing air cooling system is varied, and its advantage is simple in construction, and device fabrication is easy, less costly, but cooling effect is poor, and the windmill loss of high-speed electric expreess locomotive is bigger。The efficiency of hydrogen_cooling is higher than air cooling, but structure is complicated, and equipment investment maintenance cost is big, and it may happen that explode under certain condition。Typical gas-cooled electric machine generally comprises cooling gas circulation loop, and the driving force of cooling gas is provided by fan, and gas, after heat absorption heats up, is lowered the temperature by cooler。Transpiration-cooled version includes full immersed type, pipeline inner-cooled, Surface Mount liquid boxlike and fountain etc., and spray structure cooling working medium consumption therein is relatively fewer, simultaneously the good effect of heat exchange of discrete liquid granule。Chinese patent 200910061351.2 discloses a kind of typical motor fountain evaporative cooling system, this system achieves stator and rotor all adopts evaporative cooling, its cooling effect is greatly improved relative to air cooling system, and the consumption of evaporative cooling working medium is greatly decreased relative to full immersed type, inner-cooled evaporative cooling system, cooling working medium is after heat absorption becomes gas mutually, owing to the change nature of density rises to the condenser at motor top, after condensation, again become liquid mutually。But the cooling effect of this system depends on each nozzle in the layout of motor internal and assignment of traffic thereof, therefore, the cooling working medium distribution contacted with each heater is uniform not, the uniformity of cooling effect is good not, particularly when there being malfunctioning nozzle, easily caused by hot-spot, affect the service life of motor。
Summary of the invention
In order to overcome, existing air cooling system cooling effectiveness is low, wind moussing loss big, and hydrogen gas cooling system structure is complicated, have hidden peril of explosion and the problem that existing fountain evaporative cooling system uniformity is bad, and the present invention provides a kind of new electromotor cooling system。The present invention has the advantage of gas system and evaporative cooling system concurrently, but is not the simple superposition of two kinds of types of cooling。
Electromotor cooling system of the present invention comprises condensate cooler, gas cooling circuit and evaporative cooling loop。Gas cooling circuit and evaporative cooling loop are arranged in airtight chassis cavity, cross in condensate cooler。Condensate cooler is gas cooling circuit and the common component in evaporative cooling loop。Condensate cooler is placed in outside motor case, is connected with chassis cavity with gas outlet by air inlet。
Described gas cooling circuit includes stator core, air channel sheet, rotor core, deep bead and fan, and fan is installed on the one or both ends of rotor core, with rotor coaxial；Deep bead is positioned at the two ends of stator core, is provided with air channel sheet between stator core segment and between rotor core section。
Described evaporative cooling loop includes reserving liquid tank, subcooler, circulating pump, filter, pipeline and nozzle。Reserving liquid tank is positioned at the bottom of casing, the inlet of reserving liquid tank connects with chassis cavity, and the liquid outlet of reserving liquid tank connects with the inlet of subcooler, and the liquid outlet of subcooler connects with the front end of circulating pump, the rear end of circulating pump connects the front end of filter, and the rear end of filter is sequentially connected with pipeline and nozzle。Nozzle can be arranged between stator winding end and fan, it is also possible to is arranged in optional position in the middle of These gases cooling circuit。Reserving liquid tank can be and the self-contained unit connected bottom motor cavity, it is also possible to is used as reserving liquid tank by motor cavity。Evaporative cooling working medium is after nozzle atomization, and the mixed type cooling medium formed with cooling gas circulates at motor internal。
Condensate cooler is placed in the top outside casing, bottom or outside, and effect is cooling medium cooling cooling working medium and cooling gas mixed, and makes cooling gas lower the temperature while making cooling working medium liquefaction。Condensate cooler can be centralized configuration, namely the mixed type cooling medium of machine cavity internal recycle all is undertaken condensing and cooling down by the condensate cooler of a centralized installation, can also be distributed frame, namely jointly cooling medium condensed by the condensate cooler of the distributed installation of multiple stage and cool down。Condensate cooler is the critical component realizing evaporative cooling loop of the present invention with gas cooling circuit collaborative work。
The evaporative cooling loop of electromotor cooling system of the present invention is driven by circulating pump, and gas cooling circuit is by fans drive。Before operation, cooling working medium pours into the reserving liquid tank in evaporative cooling loop, and cooling gas is filled with airtight chassis cavity。During operation, the liquid cooled working medium in reserving liquid tank is extracted out by circulating pump, first passes through cooler cooling, then through frit, finally flows through pipeline by nozzle ejection atomization。The cooling gas that working medium after atomization is circulated brings to each heater surface in motor, enters condensate cooler with the gas circulated again after cooling working medium heat absorption vaporization, and the cooling working medium of post liquefaction is back to reserving liquid tank along condensate cooler air inlet。
After the mixing of the cooling working medium of cooling gas and atomization, by fans drive, air gap between stator core, rotor core, rotor is respectively enterd from motor side portion, respectively the heat generating components such as winding overhang, winding straightway, stator and rotor cores are cooled down, and it is final through air inlet entrance condensate cooler, cooling working medium condenses tailing edge air inlet in condensate cooler and flows back to reserving liquid tank and continue cycling through, and returns to motor end and continue cycling through after the condensed cooler cooling of cooling gas。
Compared with the conventional motor gas type of cooling, the cooling medium of cooling system of the present invention is no longer pure gas, but cooling gas and the mixture being atomized cooling working medium, heat exchange mode is also become, from single heat convection mode, the mode that phase-change heat-exchange combines with heat convection, and phase-change heat-exchange efficiency is far above heat convection, therefore cooling effect is much larger than the conventional gas type of cooling。Compared with typical fountain vapor cooling system, the atomization working medium of cooling system of the present invention do not rely on vaporization after climbing power complete circulation, and the fan being made by gas cooling circuit completes circulation, the circulation rate of cooling working medium, much larger than the circulation rate of cooling working medium in fountain evaporative cooling system, is greatly improved cooling effectiveness。Therefore, New-type electric machine cooling system of the present invention facilitates complementing each other of two kinds of types of cooling, and cooling effect is far above the simple superposition of two kinds of types of cooling。Compared with existing gas system and evaporative cooling system, the present invention has following remarkable result:
1. achieve the combination of the gas type of cooling and vapor cooling system, this combination can improve the cooling capacity of each of which type of cooling, its comprehensive cooling effect is not only far above the cooling effect of single cooling system, also apparently higher than the simple superposition of gas cooling and evaporative cooling two ways, and the uniformity of cooling is better。
2. relative to fountain evaporative cooling system, enhance robustness and the reliability of cooling system, when arrangement of nozzles is uneven, assignment of traffic is not and during some malfunctioning nozzle, still ensures that cooling working medium is full of closed shell, does not have the situation that motor local temperature is too high。
3. evaporative cooling working medium relies on no longer merely the climbing power after vaporizing to complete circulation, but accelerate circulation with the gas of flowing, forced-convection heat transfer effect is strengthened, and cooling effectiveness is improved, the consumption of cooling working medium can be reduced further, and then reduce the cost of system。
4. the difference according to gas the design of cooling circuit, condensate cooler is mountable to the top of motor, bottom, sidepiece, and centralized overall structure or modular distributed architecture can be adopted, solve condenser in single evaporative cooling system and must be installed on the limitation at motor top。
5., relative to air cooling system, it is possible to suitably reduce blast, reduce gas flow rate, thus reducing the wind moussing loss of motor。
6. due to the raising of cooling effectiveness, it is possible to improve electromagnetic load and the thermic load of motor further, increase the output of motor unit volume。
Accompanying drawing explanation
Fig. 1 electromotor cooling system overall structure schematic diagram of the present invention；
In figure: 1 casing, 2 condensate coolers, 3 nozzles, 4 pipelines, 5 reserving liquid tanks, 6 subcoolers, 7 circulating pumps, 8 filters, 9 fans, 10 deep beads。
Detailed description of the invention
Below in conjunction with drawings and embodiments, the present invention will be further described。
As it is shown in figure 1, the present invention includes condensate cooler 2, gas cooling circuit and evaporative cooling loop。Gas cooling circuit and evaporative cooling loop are placed in the inside of airtight casing 1, and condensate cooler 2 is installed on the top outside casing 1, and condensate cooler 2 is connected with casing 1 with gas outlet by its air inlet。Condensate cooler 2 is the common component of gas cooling circuit and evaporative cooling loop, and gas cooling circuit and evaporative cooling loop cross in condensate cooler 2。For the different designs of gas cooling circuit, condensate cooler 2 can also be installed on the bottom outside casing 1 or sidepiece。
Described gas cooling circuit includes stator core, air channel sheet, rotor core, deep bead 10 and fan 9。Fan 9 is installed on the one or both ends of rotor core, fan 9 and rotor coaxial。Deep bead 10 is positioned at stator core two ends, is provided with air channel sheet between stator core segment and between rotor core section。Fan 9 produces certain blast, makes the cooling gas being pre-charged with in machine cavity direction of arrow flowing shown in Fig. 1。
Described evaporative cooling loop includes reserving liquid tank 5, subcooler 6, circulating pump 7, filter 8, pipeline 4 and nozzle 3。Reserving liquid tank 5 is positioned at bottom of shell, the inner space of the inlet of reserving liquid tank 5 and casing 1, the liquid outlet of reserving liquid tank 5 connects with the inlet of subcooler 6, the liquid outlet of subcooler 6 connects with the front end of circulating pump 7, the rear end of circulating pump 7 connects the front end of filter 8, and the rear end of filter 8 is sequentially connected with pipeline 4 and nozzle 3。Nozzle 3 is arranged between stator winding end and fan 9。Liquid cooled working medium in reserving liquid tank 5 is extracted out by circulating pump 7, first passes through subcooler 6 and lowers the temperature, filters then through filter 8, finally flows through pipeline and is sprayed atomization by nozzle 3。Cooling working medium forms combination cooling medium with cooling gas after nozzle 3 is atomized and circulates at motor internal, and combination cooling medium is condensed and cools down by condensate cooler 2。
After the atomization working medium mixing that flowing gas sprays with nozzle 2, body contacts with the motor feels hot, one road air-flow enters air gap between rotor, another road air-flow blows to stator winding end, then stator core is entered from back of stator core, and enter air gap along radial passage unshakable in one's determination, successively cool down stator winding end, stator core, stator winding straightway, a road air-flow is also had to enter rotor core from rotor tip, and enter air gap from air outlet, successively cool down rotor winding end, rotor core, rotor windings straightway, three road air-flows mix in air gap after from stator radial ducts enter casing 1 top condensate cooler 2。The air inlet of cooling working medium condensed cooler 2 after condensation is back to machine cavity inside and finally flows back to the reserving liquid tank 5 of bottom of shell, returns to motor end after cooling gas cooling。
Claims (2)
1. an electromotor cooling system, it is characterised in that described electromotor cooling system includes condensate cooler (2), gas cooling circuit and evaporative cooling loop；Gas cooling circuit and evaporative cooling loop are placed in airtight casing (1), the common component that condensate cooler (2) is gas cooling circuit Yu evaporative cooling loop, gas cooling circuit and evaporative cooling loop cross in condensate cooler (2)；Condensate cooler (2) is installed on the outside of casing (1), is connected with casing (1) with gas outlet by its air inlet；
Described gas cooling circuit includes stator core, air channel sheet, rotor core, deep bead (10) and fan (9)；Fan (9) is installed on the one or both ends of rotor core, with rotor coaxial；Deep bead (10) is positioned at the two ends of stator core, is provided with air channel sheet between stator core segment and between rotor core section；
Described evaporative cooling loop includes reserving liquid tank (5), subcooler (6), circulating pump (7), filter (8), pipeline (4) and nozzle (3)；Reserving liquid tank (5) is positioned at the bottom of casing, the inlet of reserving liquid tank (5) and casing (1) inner space, the liquid outlet of reserving liquid tank (5) connects with the inlet of subcooler (6), the liquid outlet of subcooler (6) connects with the front end of circulating pump (7), the rear end of circulating pump (7) connects the front end of filter (8), and the rear end of filter (8) is sequentially connected with pipeline (4) and nozzle 3；Nozzle (3) is arranged between stator winding end and fan (9)。
2. the electromotor cooling system described in claim 1, it is characterized in that, what circulate in described gas cooling circuit is the combination cooling medium of the cooling working medium formation after cooling gas and atomization, combination cooling medium is driven by fan (9), condensate cooler (2) is entered after the cooling of each heat generating components in motor, cooling working medium flows back to reserving liquid tank (5) after condensing in condensate cooler (2), cooling gas returns to motor end after lowering the temperature in condensate cooler (2)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610152870.XA CN105703541A (en) | 2016-03-17 | 2016-03-17 | Motor cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610152870.XA CN105703541A (en) | 2016-03-17 | 2016-03-17 | Motor cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105703541A true CN105703541A (en) | 2016-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610152870.XA Pending CN105703541A (en) | 2016-03-17 | 2016-03-17 | Motor cooling system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060908A (en) * | 2017-06-22 | 2017-08-18 | 哈尔滨广瀚新能动力有限公司 | A kind of organic Rankine bottoming cycle Turbo-generator Set cooling system and cooling means |
| CN108258849A (en) * | 2018-01-31 | 2018-07-06 | 华中科技大学 | A kind of totally-enclosed high-speed permanent magnet motor of Liquid injection cooling |
| CN108429403A (en) * | 2018-05-21 | 2018-08-21 | 广东上水能源科技有限公司 | A kind of motor based on coolant liquid is from driving cooling structure |
| CN109120104A (en) * | 2018-09-28 | 2019-01-01 | 北京金风科创风电设备有限公司 | Wind generating set, motor and air flow conveying device of motor air gap |
| CN111431346A (en) * | 2019-10-25 | 2020-07-17 | 襄阳中车电机技术有限公司 | Trinity electric drive assembly of new energy automobile |
| US20210317835A1 (en) * | 2020-04-09 | 2021-10-14 | Hamilton Sundstrand Corporation | Cooling system for electric machines |
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| JP2009038940A (en) * | 2007-08-03 | 2009-02-19 | Nissan Motor Co Ltd | Motor cooling device, motor cooling method, and vehicle mounted with motor having motor cooling device |
| CN102097907A (en) * | 2011-03-18 | 2011-06-15 | 肖富凯 | Sealing device and condensing unit of evaporative cooling asynchronous motor stator as well as manufacturing methods thereof |
| CN203279429U (en) * | 2013-01-09 | 2013-11-06 | 中国科学院电工研究所 | Spraying evaporative cooling circulatory system for a heating apparatus |
| CN203347853U (en) * | 2013-07-17 | 2013-12-18 | 陈庆辉 | Thermal power unit turbine condensate super-cooling and efficiency improving treatment device |
| CN204425120U (en) * | 2015-01-21 | 2015-06-24 | 东方电气集团东方电机有限公司 | A kind of electric rotating machine atomization and vaporization cooling system, motor |
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Patent Citations (5)
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| JP2009038940A (en) * | 2007-08-03 | 2009-02-19 | Nissan Motor Co Ltd | Motor cooling device, motor cooling method, and vehicle mounted with motor having motor cooling device |
| CN102097907A (en) * | 2011-03-18 | 2011-06-15 | 肖富凯 | Sealing device and condensing unit of evaporative cooling asynchronous motor stator as well as manufacturing methods thereof |
| CN203279429U (en) * | 2013-01-09 | 2013-11-06 | 中国科学院电工研究所 | Spraying evaporative cooling circulatory system for a heating apparatus |
| CN203347853U (en) * | 2013-07-17 | 2013-12-18 | 陈庆辉 | Thermal power unit turbine condensate super-cooling and efficiency improving treatment device |
| CN204425120U (en) * | 2015-01-21 | 2015-06-24 | 东方电气集团东方电机有限公司 | A kind of electric rotating machine atomization and vaporization cooling system, motor |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107060908A (en) * | 2017-06-22 | 2017-08-18 | 哈尔滨广瀚新能动力有限公司 | A kind of organic Rankine bottoming cycle Turbo-generator Set cooling system and cooling means |
| CN108258849A (en) * | 2018-01-31 | 2018-07-06 | 华中科技大学 | A kind of totally-enclosed high-speed permanent magnet motor of Liquid injection cooling |
| CN108258849B (en) * | 2018-01-31 | 2020-07-10 | 华中科技大学 | Liquid-spraying-cooled totally-enclosed high-speed permanent magnet motor |
| CN108429403A (en) * | 2018-05-21 | 2018-08-21 | 广东上水能源科技有限公司 | A kind of motor based on coolant liquid is from driving cooling structure |
| CN108429403B (en) * | 2018-05-21 | 2024-05-28 | 广州亿智环保科技有限公司 | Motor self-driven cooling structure based on cooling liquid |
| EP3780361A4 (en) * | 2018-09-28 | 2021-09-01 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Wind power generation unit, electic motor, and airflow delivery device for electric motor air gap |
| AU2019350122B2 (en) * | 2018-09-28 | 2022-02-03 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Wind power generation unit, electic motor, and airflow delivery device for electric motor air gap |
| US11855511B2 (en) | 2018-09-28 | 2023-12-26 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Wind power generation unit, electric motor, and airflow delivery device for electric motor air gap |
| CN109120104A (en) * | 2018-09-28 | 2019-01-01 | 北京金风科创风电设备有限公司 | Wind generating set, motor and air flow conveying device of motor air gap |
| CN111431346A (en) * | 2019-10-25 | 2020-07-17 | 襄阳中车电机技术有限公司 | Trinity electric drive assembly of new energy automobile |
| CN111431346B (en) * | 2019-10-25 | 2021-09-10 | 襄阳中车电机技术有限公司 | Trinity electric drive assembly of new energy automobile |
| US20210317835A1 (en) * | 2020-04-09 | 2021-10-14 | Hamilton Sundstrand Corporation | Cooling system for electric machines |
| US11859623B2 (en) * | 2020-04-09 | 2024-01-02 | Hamilton Sundstrand Corporation | Cooling system for electric machines |
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Application publication date: 20160622 |
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