CN102820738B - Spray type motor stator evaporative cooling system - Google Patents
Spray type motor stator evaporative cooling system Download PDFInfo
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- CN102820738B CN102820738B CN201210295956.XA CN201210295956A CN102820738B CN 102820738 B CN102820738 B CN 102820738B CN 201210295956 A CN201210295956 A CN 201210295956A CN 102820738 B CN102820738 B CN 102820738B
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Abstract
The invention discloses a spray type motor stator evaporative cooling system, wherein a stator enclosed space consists of a stator enclosure (1), a spacing sleeve (3) and an end cover (2). A spraying system comprises liquid dispensers (801, 802, 803 and 804) which are distributed at the back part of a stator core (7), in the stator core (7), in a stator slot bottom subslot and the periphery of the end part of a stator winding (6) and nozzles (9) which are arranged on the liquid dispensers (801, 802, 803 and 804). A circulating pump (10) in an outer forced circulation system pumps an evaporative cooling medium from the bottom of the stator enclosed space, and the evaporative cooling medium is filtered by a filter (11), and is delivered to the nozzles (9) through the liquid dispensers (801, 802, 803 and 804). The atomized evaporative cooling medium is directly sprayed to all the heating elements of the stator. The evaporative cooling medium which is subjected to heat exchange flows into the stator enclosed space, the vaporized evaporative cooling medium flows into a condenser (12) at the top of the stator enclosure (1), and is changed into the liquid after being condensed by the condenser (12), and the liquid flows back into the stator enclosed space.
Description
Technical field
The present invention relates to a kind of motor stator evaporative cooling system
Background technology
Along with the increase of capacity motor, caloric value increases, and the heat-sinking capability of motor directly affects performance and the life-span of motor, and this just proposes higher requirement to the cooling system of motor.Evaporation cooling technique utilizes the principle of evaporative cooling medium vaporization heat absorption to carry out cooling motor.Compared with traditional type of cooling, there is unique advantage.Evaporation cooling technique utilizes the latent heat of vaporization to absorb heat, and cooling effectiveness is high, and cooling effect is evenly comprehensive.It adopts, and height insulate, boiling point is suitable, do not fire evaporative cooling medium that is not quick-fried, safe, stable, asepsis environment-protecting, ensure that the safe and stable operation of motor.
At present, evaporation cooling technique is applied to motor stator cooling and has two kinds of conventionally forms: pipeline inner-cooled and complete immersion formula.
The transpiration-cooled conventional application mode of pipeline inner-cooled is: stator winding adopts hollow conductor, or the mode that hollow conductor and solid conductor combine, and evaporative cooling medium in hollow conductor internal flow.Heat is delivered to hollow conductor inside, evaporative cooling medium heat absorption vaporization, under the effect of self or external circulation power, external condensation device is entered into along evaporative cooling loop, hollow conductor inside continuation circulation is next time returned after condenser condenses, so go round and begin again, reach the object of cooling motor stator.Chinese patent 01131399.4 proposes the evaporation-cooled device of hydraulic generator stator winding.Chinese patent 200710177555.3 proposes a kind of stator structure of inner cooling type self-circulation vaporization cooling wind power generator.Both is the application of this pipeline inner-cooled evaporation cooling technique on hydraulic generator and wind-driven generator above respectively.Chinese patent 201110385743.1 proposes a kind of stator evaporative cooling device, and propose at stator core internal placement hollow pipe, the liquid collecting ring that hollow pipe and stator both sides are installed is connected with collecting ring, and coolant is in closing pipe line inner loop.The topmost deficiency of this several inner-cooled evaporative cooling scheme has two aspects above: on the one hand stator winding twists in end distortion, the hollow pipe of stator winding internal placement also will reverse thereupon, the stator processing difficulty less for diameter is larger, cannot the hollow section size of effective guarantee hollow pipe inside, affect inner evaporative cooling media flow; On the other hand because motor stator winding caloric value is larger, therefore need to arrange many hollow pipes in stator core or stator winding, the intercooling cycle closed requires that every root hollow pipe is all connected with steam collector with collector tube by joint, whole cooling system pipeline, joint will inevitably be caused so numerous, and the position multidigit of joint is in space-constrained stator winding end, the complex structure of system and constructional difficulties, and the difficulty causing operation, safeguard, reduce the reliability of whole system.
The transpiration-cooled conventional application mode of complete immersion formula is: with stator cage, distance sleeve and end cover composition enclosure space, be all immersed in evaporative cooling medium by the heat generating components such as stator core and stator winding.Evaporative cooling medium heat absorption vaporization, steam rises and enters into external condensation device, becomes liquid and flow back into enclosure space inside again, reach the object of cooling motor stator after condenser condenses.Chinese patent 200810114870.6 proposes horizontal pervaporatively cooling motor.Chinese patent 200510086794.9 proposes a kind of evaporative cooling aerogenerator stator.Both is the application of complete immersion formula evaporation cooling technique on turbo generator and wind-driven generator above respectively.But the deficiency of this type of cooling mainly contains two aspects: be adopt the evaporative cooling medium amount ratio of complete immersion formula structure needs larger on the one hand, space particularly occupied by end-heating parts is less, but needs to waste a lot of evaporative cooling medium and go to fill.The evaporative cooling medium price of current novel environment-friendly is higher, adopts the stator cost of complete immersion formula structure to be limited by high evaporative cooling medium, seriously have impact on the economy of motor; On the other hand, the stator interior seal cavity of complete immersion formula structure is adopted to be filled with evaporative cooling medium, higher requirement is proposed to the rigidity of distance sleeve and the reliability of hermetically-sealed construction, especially distance sleeve is in order to keep enough rigidity, therefore certain radial thickness is needed, motor gas-gap increases thereupon, adds difficulty to design of electrical motor, also improves the cost of motor.
Summary of the invention
The object of the invention is the deficiency overcoming existing pipeline inner-cooled and complete immersion formula vapor cooling system, a kind of motor stator fountain evaporative cooling system is provided.Electric machine stator iron of the present invention and stator winding adopt spraying cooling, and the evaporative cooling medium after unnecessary evaporative cooling medium and condensation will directly be kept at enclosure space inside.
The present invention by the following technical solutions.
The spray system, outside forced circulation system and the condenser that the present invention includes seal stator space and install wherein.Stator confined space is formed by stator cage, distance sleeve and end part seal end cap.Stator core and stator winding are sealed in described stator confined space.In seal stator interior volume, spray system is installed, described spray system comprises liquid distributor and is arranged on nozzle on liquid distributor, and liquid distributor to be arranged in back of stator core, stator core, at the bottom of stator slot in secondary groove and stator winding end surrounding.The above space of stator confined space inner evaporative cooling medium liquid level is stator evaporating space.Outside forced circulation system is arranged on outside stator cage, and this outside forced circulation system comprises the parts such as circulating pump and filter.The front end of circulating pump is connected by the bottom of pipeline with seal stator space, and the rear end of circulating pump connects filter by pipeline, and the rear end of filter connects liquid distributor by pipeline.Condenser is arranged on stator cage top.Liquid evaporative cooling medium is kept at the bottom in seal stator space, is extracted out, after metre filter, sends into liquid distributor, directly spray to each heat generating components of stator after nozzle atomization by circulating pump.After liquid evaporative cooling medium and heat generating components carry out heat exchange, a part of evaporative cooling medium is still liquid, directly flow back into the bottom in seal stator space; Another part evaporative cooling medium becomes steam state by thermal evaporation, and rising through stator evaporating space enters condenser, becomes liquid state, flows back to seal stator space bottom, constitute the evaporative cooling loop of whole system after condensation.
The present invention is provided with non magnetic distance sleeve at the inner circle of stator core, and end part seal end cap is arranged on stator cage and non magnetic distance sleeve two ends, is provided with pressure stop ring outside end part seal end cap, for fixing and sealing non magnetic distance sleeve.Form an enclosure space by stator cage, distance sleeve and end part seal end cap, stator core and stator winding are sealed in this stator confined space closed.
The present invention's many liquid distributors axial distribution centered by electrical axis that in secondary groove, this three place arranges in electric machine stator iron back, stator core and at the bottom of stator slot.Liquid distributor wire loop centered by electrical axis that the surrounding of stator winding end is arranged distributes.The number of liquid distributor is determined according to the size of motor and stator loss.Liquid distributor is hollow tubular, and the cross section of its exterior cross-section and endoporus can be circular, and rectangle or polygon, liquid distributor has hole, and liquid distributor is connected with nozzle by this perforate.The liquid distributor of the surrounding layout of stator winding end can be arranged on the both sides of stator cage internal stator iron core, also can be arranged on outside stator cage.
The front end of liquid distributor is connected with the filter in outside forced circulation system by pipeline, and the tail end of liquid distributor is closed.Every root liquid distributor can be connected with outside forced circulation system separately through pipeline, also can many liquid distributors pool together after be connected with outside forced circulation system by pipeline.Evaporative cooling medium enters liquid distributor from outside forced circulation system, enters nozzle by perforate, directly sprays to stator heat generating components by after nozzle atomization.After carrying out heat exchange, liquid evaporative cooling medium directly enters stator confined space, evaporative cooling medium steam after heat absorption vaporization rises to condenser through stator evaporating space, and the evaporative cooling medium after condenser condenses changes liquid into, flow back into the bottom of stator confined space.
Flow in evaporative cooling loop evaporative cooling medium.Evaporative cooling medium selected by the present invention meets high insulation, it is not quick-fried not fire, boiling point is suitable, stability and safety, nontoxic, environmental protection requirement, also can select the liquid mixed by the oil based media of the contour insulation of transformer oil, good heat conduction effect and evaporative cooling medium.
Stator evaporative cooling device of the present invention, has following outstanding feature:
(1) compared with conventional totally-enclosed circulating line inner-cooled, the pipeline laid and joint quantity reduce, and there have seal isolation sleeve whole coolant to be sealed in stator confined space in system to be inner, therefore the sealing property of each pipeline and joint and technology difficulty require also to lower thereupon;
(2) compared with complete immersion formula, the consumption of evaporative cooling medium reduces greatly, and stator interior seal cavity only has bottom to retain a small amount of medium meeting stator cooling and systemic circulation requirement, and motor cost reduces, and economy improves.Simultaneously because stator confined space inside is no longer full of evaporative cooling medium, reduce the rigidity requirement of distance sleeve, its radial thickness also can reduce compared with the distance sleeve used in complete immersion formula, is conducive to the design of motor.
Accompanying drawing explanation
Fig. 1 is the stator spray evaporative cooling system structural representation that motor longitudinal profile is shown;
Fig. 2 is that motor is at stator core segment horizontal section schematic diagram;
Fig. 3 is that motor is at stator winding end horizontal section schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Fountain evaporative cooling system structure composition of the present invention as shown in Figure 1.Install non magnetic distance sleeve 3 at the inner circle of stator core 7, end part seal end cap 2 is arranged on stator cage 1 and non magnetic distance sleeve 3 two ends, outside pressure stop ring 4 mounting end end cover 2.Stator cage 1 top is provided with condenser 12.The forced circulation system of evaporative cooling system is arranged on outside stator cage 1, comprise the parts such as circulating pump 10 and filter 11, the front end of circulating pump 10 is connected by the bottom of pipeline with seal stator space, the rear end of circulating pump 10 connects filter 11 by pipeline, and the rear end of filter 11 connects each liquid distributor by pipeline.Circulating pump 10 extracts liquid evaporative cooling medium from the bottom of stator confined space and sends into filter 11.Evaporative cooling medium after filter 11 filters enters each liquid distributor, directly sprays to each heat generating components after being atomized by nozzle 9.After liquid evaporative cooling medium and heat generating components carry out heat exchange, a part of medium is still liquid, directly flow back into the bottom in seal stator space; Another part medium becomes steam state by thermal evaporation, and rising through stator evaporating space enters condenser 12, becomes liquid state, flow back to seal stator space bottom after condensation.
In actual applications, the quantity of circulating pump 10 and filter 11 can do corresponding adjustment according to concrete the motor feels hot situation and evaporative cooling medium consumption.Condenser 12 can select air-cooled, water-cooled or other methods for cooling according to embody rule situation.
The many liquid distributors being parallel to electrical axis 5 are arranged, many liquid distributors axial distribution centered by electrical axis 5 in electric machine stator iron 7 back, stator core 7 and in secondary groove 701 at the bottom of stator slot.Liquid distributor 804 can be arranged on stator core 7 back.Liquid distributor 802 also can be arranged on inside, the hole in stator core 7.Liquid distributor 801 also can be arranged in secondary groove 701 at the bottom of stator slot, and the deployment scenarios of above three kinds of liquid distributors as shown in Figure 2.The set-up mode of various liquid distributor, determines according to motor stator structure and stator loss above, can arrange simultaneously, and several type combination also can be selected to arrange.Liquid distributor is hollow tubular, and along motor shaft to having hole on it, liquid distributor is connected with nozzle 9 by this perforate.Multiple nozzle 9 is arranged at axial direction interval, and the axial spacing between two nozzles 9 is equidistant or unequal-interval, same radial section can be installed multiple nozzle 9.Be arranged on the liquid distributor in electric machine stator iron 7 back, stator core 7 and in secondary groove 701 at the bottom of stator slot, also nozzle 9 can not be installed by spatial limitation.Liquid evaporative cooling medium directly sprays to heat generating components from the perforate of liquid distributor.
Liquid distributor 804 quantity being arranged on stator winding 6 end surrounding is at least two, namely ensures that Zhong Mei side, stator both sides has a liquid distributor 804 at least.Liquid distributor 804 is hollow tubular, can be arranged on the both sides of stator cage 1 inner stator cores 7, also can be arranged on outside stator cage 1.Multiple nozzle 9 is arranged according to upper and lower differing heights, as shown in Figure 3.
Liquid distributor 801,802,803 with 804 front end be connected with the filter 11 in outside forced circulation system by pipeline, tail end close.Evaporative cooling medium enters liquid distributor from outside forced circulation system, then is atomized rear direct spray on each heat generating components by nozzle 9.Every root liquid distributor can be connected with outside forced circulation system separately through pipeline, also can many liquid distributors pool together after be connected with outside forced circulation system by pipeline.
In actual applications, the arrangement of liquid distributor 801,802,803 and 804 and nozzle 9 and each connecting line and joint can do corresponding adjustment according to concrete electric machine structure.
Flow in evaporative cooling loop evaporative cooling medium.Evaporative cooling medium selected by the present invention meets high insulation, it is not quick-fried not fire, boiling point is suitable, stability and safety, nontoxic, environmental protection requirement, also can select the liquid mixed by the oil based media of the contour insulation of transformer oil, good heat conduction effect and evaporative cooling medium.
Claims (4)
1. a spray type motor stator evaporative cooling system, is characterized in that, described evaporative cooling system comprises stator confined space and is arranged on spray system wherein, outside forced circulation system and condenser (12); Described stator confined space is made up of stator cage (1), non magnetic distance sleeve (3) and end part seal end cap (2); Stator core (7) and stator winding (6) are sealed in described stator confined space; Non magnetic distance sleeve (3) is arranged on the inner circle of stator core (7); End part seal end cap (2) is arranged on the two ends of stator cage (1) and described distance sleeve (3); Pressure stop ring (4) is arranged on the outside of end part seal end cap (2); Be provided with spray system in stator confined space inside, described spray system comprises liquid distributor and is arranged on the nozzle on liquid distributor; Liquid distributor is arranged in stator core (7) back, in stator core (7), at the bottom of stator slot in secondary groove and the surrounding of stator winding (6) end; Condenser (12) is positioned at stator cage (1) top; Outside forced circulation system is arranged on stator cage (1) outward; The above space of stator confined space inner evaporative cooling medium liquid level is stator evaporating space;
Be arranged in the many liquid distributors axial distribution centered by electrical axis (5) in the back of described electric machine stator iron (7), stator core (7) and in secondary groove (701) at the bottom of stator slot; Liquid distributor is provided with nozzle (9) vertically, arranges, same radial section is installed multiple nozzle (9) between multiple nozzle (9) at axial direction interval.
2. according to spray type motor stator evaporative cooling system according to claim 1, it is characterized in that, the multiple nozzles (9) be arranged on the liquid distributor (804) of described stator winding (6) end are arranged according to upper and lower differing heights.
3. according to spray type motor stator evaporative cooling system according to claim 2, it is characterized in that, described liquid distributor is hollow tubular, and the exterior cross-section of liquid distributor and inner hole section are circular or polygon.
4. according to spray type motor stator evaporative cooling system according to claim 1, it is characterized in that in described evaporative cooling system, the evaporative cooling medium that circulating pump (10) extracts bottom stator confined space is by filter (11); Evaporative cooling medium through filtering is sent into nozzle (9) by liquid distributor and is directly sprayed to each heat generating components of stator; After carrying out heat exchange, the evaporative cooling medium of liquid part flows directly to the bottom of stator confined space, evaporative cooling medium after heat absorption vaporization rises to condenser (12), become liquid through condenser (12) condensed evaporative cooling medium, flow back into the bottom of stator confined space.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210295956.XA CN102820738B (en) | 2012-08-17 | 2012-08-17 | Spray type motor stator evaporative cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210295956.XA CN102820738B (en) | 2012-08-17 | 2012-08-17 | Spray type motor stator evaporative cooling system |
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| CN102820738A CN102820738A (en) | 2012-12-12 |
| CN102820738B true CN102820738B (en) | 2015-03-18 |
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| CN105871125A (en) * | 2015-01-21 | 2016-08-17 | 东方电气集团东方电机有限公司 | Rotary motor atomizing evaporative cooling system, motor and cooling method thereof |
| CN105356637A (en) * | 2015-12-09 | 2016-02-24 | 南京磁谷科技有限公司 | Evaporative cooling structure of motor rotor |
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| CN109361292A (en) * | 2018-11-02 | 2019-02-19 | 南京林业大学 | A kind of full-liquid type evaporative cooling system cooling for motor |
| CN109361293A (en) * | 2018-11-02 | 2019-02-19 | 南京林业大学 | A kind of dry type evaporative cooling system cooling for motor |
| CN109654049B (en) * | 2019-02-22 | 2020-09-29 | 广州市万通通风设备有限公司 | High-temperature-resistant fan |
| CN110492663B (en) * | 2019-07-08 | 2021-02-23 | 华为技术有限公司 | Motor, power assembly and car |
| US20240171044A1 (en) * | 2022-11-22 | 2024-05-23 | Raytheon Company | Two-phase liquid-cooled alternating current (ac) rotating electrical machine |
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| JPS5224203B1 (en) * | 1967-10-23 | 1977-06-29 | ||
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| CN202034873U (en) * | 2011-03-18 | 2011-11-09 | 肖富凯 | Sealing device and condenser for evaporative cooling asynchronous motor stator |
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