CN102130540B - Ventilating heat-radiation structure of direct-drive permanent-magnet wind-driven generator - Google Patents

Ventilating heat-radiation structure of direct-drive permanent-magnet wind-driven generator Download PDF

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Publication number
CN102130540B
CN102130540B CN2011100586673A CN201110058667A CN102130540B CN 102130540 B CN102130540 B CN 102130540B CN 2011100586673 A CN2011100586673 A CN 2011100586673A CN 201110058667 A CN201110058667 A CN 201110058667A CN 102130540 B CN102130540 B CN 102130540B
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China
Prior art keywords
heat
casing
direct
ventilation
radiating ribs
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CN2011100586673A
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Chinese (zh)
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CN102130540A (en
Inventor
华小平
徐安军
于杰
侯文磊
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华小平
田书深
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Priority to CN2011100586673A priority Critical patent/CN102130540B/en
Publication of CN102130540A publication Critical patent/CN102130540A/en
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Publication of CN102130540B publication Critical patent/CN102130540B/en

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Abstract

The invention discloses a ventilating heat-radiation structure of a direct-drive permanent-magnet wind-driven generator. The ventilating heat-radiation structure comprises a casing and an external industrial air conditioner, wherein ventilating gaps communicated with each other are formed by enclosure of a main shaft, a rotor, a stator, a front end cover and a rear end cover in the casing, and heat-radiating ribs are arranged on the casing. A blast pipe of the industrial air conditioner is communicated with the ventilating gaps, the stator is provided with radial air vents, baffles are arranged among the heat-radiating ribs, the end part of the casing is provided with an annular hot blast collecting channel, the circulating air ducts communicated with the radial air vents are formed among the heat-radiating ribs and the baffles through enclosure, the circulating air ducts are communicated with the hot blast collecting channel, and a suction pipe of the industrial air conditioner is communicated with the hot blast collecting channel. The ventilating heat-radiation structure has the beneficial effects that the heat-radiation efficiency is greatly improved, the difficulty in transportation and installation of large direct-drive generators is solved, and the cost of the generator is reduced to a large extent at the same time.

Description

A kind of direct-drive permanent magnet wind power generator ventilation and heat structure
Technical field
The present invention relates to a kind of direct-drive permanent magnet wind power generator ventilation and heat structure, belong to direct-drive permanent-magnetism technical field of generators in the wind power plant.
Background technology
Heat radiation is the important factors that wind-driven generator need be considered.Known direct-drive permanent magnet wind power generator generally adopts natural wind cooling mode.Though the direct-drive permanent-magnetism generator has inner rotor core mode and two kinds of versions of outer-rotor structure mode, adopting to such an extent that all be the mode of natural wind cooling aspect the ventilation cooling.Natural wind cooling itself is low with regard to efficient, adds the support that wind-driven generator has the tower tube, and its tower tube effect is influential to generator natural draft heat radiation.So the general nature ventilation and heat is unbalanced, the generator local temperature is raise, influence the generator result of use.
The annual major part of wind turbine generator wind power generation operates in 60% following rated power work; And the time operation of operating at full capacity the whole year had only about 500 hours; And this part to generate electricity at full capacity be best period of wind-resources, therefore to guarantee wind-driven generator normal power generation during this period of time.The common natural air cooled heat radiation requirement that can guarantee the wind turbine generator most of the time in the following operate as normal of rated power, but satisfied not the heat radiation requirement of generating set under oepration at full load.
Especially for direct-drive permanent magnet wind power generator, because radiating efficiency is low, can cause that direct-drive permanent-magnetism generator Structure volume is big, power density is little, cause the effective stock utilization of generator low, directly improve the cost of generator per kilowatt.And be limited by heat dissipation technology and can't break through, to such an extent as to the direct wind-driven generator external diameter of the above power of present 3 megawatts surpasses 5.2 meters, bring very large difficulty for aspects such as transportation and assembling.
Summary of the invention
Be technical deficiency more than solving, the invention provides the high direct-drive permanent magnet wind power generator ventilation and heat structure of a kind of radiating efficiency.
The present invention realizes through following measure:
A kind of direct-drive permanent magnet wind power generator ventilation and heat structure of the present invention comprises casing, in the said casing
Main shaft, rotor, stator, front end housing and rear end cap surround the ventilation voids that is connected, and casing is provided with radiating ribs, also comprise external industrial air-conditioning, and the ajutage of said industrial air-conditioning is connected with ventilation voids; Said stator is provided with the radial ventilation hole; Be provided with baffle plate between the adjacent radiating ribs; Surround the circulation air path that is connected with the radial ventilation hole between radiating ribs and the baffle plate; The casing end is provided with the hot blast collection channel of annular; Said circulation air path is connected with the hot blast collection channel, and the aspiration channel of industrial air-conditioning is connected with the hot blast collection channel.
In order to carry out the natural wind cooling simultaneously, the cross section of above-mentioned each radiating ribs is a U-shaped, and middle groove is the natural draft road; Circumference radiating ribs end evenly distributed and separately the composition casing that is connected, baffle plate be connected two adjacent radiating ribs at interval between.
In order to improve radiating efficiency, the ajutage of above-mentioned industrial air-conditioning is two, is connected on front end housing and the rear end cap.
Be provided with annular air supply channel in above-mentioned front end housing and the rear end cap; Said air-supply passage is provided with the fumarole that is communicated with ventilation voids; The ajutage of industrial air-conditioning is connected with air-supply passage, thereby makes cold wind blow in the casing good cooling effect more equably.
In order to be stator cooling, the space center of above-mentioned fumarole between stator and rotor better.
Be provided with temperature sensor in the said machine casing, said temperature sensor is connected with the complete machine control system, can open the air blast cooling cooling according to the temperature conditions of reality.
The invention has the beneficial effects as follows:
The refrigeration modes that has adopted the natural draft cooling to combine with the inner industrial air-conditioning forced ventilation refrigeration of generator; Improved radiating efficiency greatly; Solve traditional direct wind-driven generator and received the restriction of radiating effect; Its effective stock utilization improves, structural volume reduces, the generator cost per kilowatt reduces thereby make, and has solved the large-scale difficult problem of directly driving the generator transportation and installing, and has reduced the generator cost simultaneously to a great extent.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the casing perspective view.
Fig. 3 is a cross-sectional view.
Fig. 4 is a front and rear cover part-structure sketch map.
Among the figure: 1 front end housing, 2 stators, 3 casings, 4 rear end caps, 5 rotors; 6 bearings, 7 main shafts, 8 permanent magnets, 9 radial ventilation holes, 10 ajutage a; 11 ajutage b, 12 aspiration channels, 13 industrial air-conditionings, 301 hot blast collection channels, 302 radiating ribs; 303 baffle plates, 304 natural draft roads, 305 circulation air paths, 101 air-supply passages, 102 fumaroles.
Embodiment
Like Fig. 1,2, shown in 3, the direct-drive permanent-magnetism generator mainly comprises parts such as casing 3, stator 2, rotor 5, main shaft 7, front end housing 1, rear end cap 4.Main shaft 7, rotor 5, stator 2, front end housing 1 and rear end cap 4 in the casing 3 surround the ventilation voids that is connected; Evenly distributed and 302 ends of radiating ribs separately of circumference are connected and form casing 3; Radiating ribs 302 inner surfaces directly contact with iron core in stator 2 structures; Radiating ribs 302 can be dispelled the heat, again can support machine casing 3.
Be provided with annular air supply channel 101 in front end housing 1 and the rear end cap 4; Evenly arrange a plurality of fumaroles that are communicated with ventilation voids 102 on the air-supply passage 101; The ajutage of industrial air-conditioning 13 is connected with air-supply passage 101, thereby makes cold wind blow in the casing 3 good cooling effect more equably.In order to be stator 2 coolings better, the space center of fumarole 102 between stator 2 and rotor 5.
Stator 2 is fastened on the casing 3, comprises iron core and winding.Rotor 5 is provided with permanent magnet 8, and rotor 5 is supported on the main shaft 7 through former and later two bearings 6.Stator 2 is provided with radial ventilation hole 9.
In order to carry out the natural wind cooling simultaneously, the cross section of each radiating ribs 302 is a U-shaped, and middle groove is natural draft road 304.Be arranged at intervals with baffle plate 303 between the adjacent radiating ribs 302; Casing 3 ends are provided with the hot blast collection channel 301 of annular; Surround the circulation air path 305 that is connected with radial ventilation hole 9 between adjacent radiating ribs 302 and the baffle plate 303; Circulation air path 305 is connected with hot blast collection channel 301, and the aspiration channel 12 of industrial air-conditioning 13 is connected with hot blast collection channel 301.Hot blast collection channel 301 is arranged on an end of casing 3 simultaneously, and circulation air path 305 closed-end of casing 3 other ends make things convenient for natural wind to blow over from natural air channel.
Be provided with temperature sensor in the casing 3, temperature sensor is connected with the complete machine control system, according to the generator working temperature reference value of setting, in time controls industrial air-conditioning 13 and opens air-supply, thereby select air-conditioning temperature-reducing or natural wind cooling.Wherein, the radiating requirements of rated power and specified following power is satisfied in the heat radiation of natural draft heat dissipation channel basically, can't satisfy heat radiation when requiring when natural draft, opens the forced heat radiation system and dispels the heat.In order to make the cold wind cooling-down effect better.
Its operation principle is:
As shown in fig. 1, during the generator operate as normal,,, thereby destroy generator if untimely distributing perhaps caused the inefficacy of permanent magnet 8 with the destruction generator windings because iron loss and copper loss produce a large amount of heat in stator 2 core interior.Be lower than rated power when work when directly driving generator power, the natural wind cooling through the external world can reach the generator radiating effect, and at this moment, extraneous natural wind flows through the natural draft road 304 that is arranged on the casing 3, and heat is taken away, and reaches the purpose of heat radiation.
When generator power reaches rated power when above, depend merely on the natural wind cooling and satisfied not the heat radiation requirement of generator, open inner The forced air cooling this moment.Cold wind by industrial air-conditioning 13 is delivered to respectively in the air-supply passage 101 on the front and rear cover 4 through ajutage a10, ajutage b11; After fumarole 102 ejections; Cold wind is flowed through on the rotor 5 permanent magnet 8 with the space between the stator 2; Radial ventilation hole 9 through stator 2 gets into along even circulation air path 305 spaced apart on the casing 3 again, and then flow to together in the hot blast collection channel 301 that is provided with on casing 3 one ends, gets back in the industrial air-conditioning 13 through aspiration channel 12 and freezes; To this moment, the cold wind of from industrial air-conditioning 13, seeing off flows through a circulation.Cold wind is from fumarole 102 ventilation voids of directly flowing through; Flowing to inner loop air channel 305 through radial ventilation hole 9 again arrives in the process of hot blast collection channel 301; The heat that generator produces is taken away, delivered to refrigeration in the industrial air-conditioning 13, accomplished the process of inner forced heat radiation.
In the course of work of forced ventilation refrigeration, monitor internal temperature at any time through the casing 3 inner temperature sensors of installing, and control the unlatching of forced ventilation refrigerating system through control system.
The refrigeration modes that the present invention adopts the inner industrial air-conditioning 13 forced ventilations refrigeration of casing 3 natural draft coolings and generator to combine, and make frame mode to generator unit stator 2 iron cores with radial ventilation groove.Improve generator material effective rate of utilization, can make generator accomplish that volume is little, in light weight, both solved transportation problem, reduced the generator manufacturing cost again.
The foregoing description is said to be in order to specify this patent; Though describe through specific term in the literary composition; But can not limit the protection range of this patent with this; The personage who is familiar with this technical field can change or revise it after the spirit of understanding this patent and principle and reach equivalent purpose, and this equivalence change and modification all should be covered by the claim scope and define in the category.

Claims (6)

1. direct-drive permanent magnet wind power generator ventilation and heat structure; Comprise casing; Main shaft, rotor, stator, front end housing and rear end cap in the said casing surround the ventilation voids that is connected; Casing is provided with radiating ribs, it is characterized in that: also comprise external industrial air-conditioning, the ajutage of said industrial air-conditioning is connected with ventilation voids; Said stator is provided with the radial ventilation hole; Be provided with baffle plate between the adjacent radiating ribs; Surround the circulation air path that is connected with the radial ventilation hole between radiating ribs and the baffle plate; The casing end is provided with the hot blast collection channel of annular; Said circulation air path is connected with the hot blast collection channel, and the aspiration channel of industrial air-conditioning is connected with the hot blast collection channel.
2. direct-drive permanent magnet wind power generator ventilation and heat structure according to claim 1 is characterized in that: the cross section of each said radiating ribs is a U-shaped, and the groove in the middle of the radiating ribs is the natural draft road; Circumference radiating ribs end evenly distributed and separately the composition casing that is connected, baffle plate is connected between two adjacent radiating ribs.
3. direct-drive permanent magnet wind power generator ventilation and heat structure according to claim 1; It is characterized in that: be provided with annular air supply channel in said front end housing and the rear end cap; Said air-supply passage is provided with the fumarole that is communicated with ventilation voids, and the ajutage of industrial air-conditioning is connected with air-supply passage.
4. direct-drive permanent magnet wind power generator ventilation and heat structure according to claim 3 is characterized in that: the space center of said fumarole between stator and rotor.
5. direct-drive permanent magnet wind power generator ventilation and heat structure according to claim 1, it is characterized in that: the ajutage of said industrial air-conditioning is two, is connected on front end housing and the rear end cap.
6. direct-drive permanent magnet wind power generator ventilation and heat structure according to claim 1 is characterized in that: be provided with temperature sensor in the casing, said temperature sensor is connected with the complete machine control system.
CN2011100586673A 2011-03-11 2011-03-11 Ventilating heat-radiation structure of direct-drive permanent-magnet wind-driven generator CN102130540B (en)

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CN2011100586673A CN102130540B (en) 2011-03-11 2011-03-11 Ventilating heat-radiation structure of direct-drive permanent-magnet wind-driven generator

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Application Number Priority Date Filing Date Title
CN2011100586673A CN102130540B (en) 2011-03-11 2011-03-11 Ventilating heat-radiation structure of direct-drive permanent-magnet wind-driven generator

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CN102130540B true CN102130540B (en) 2012-07-25

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CN102332780B (en) * 2011-09-30 2013-06-19 东方电气集团东方电机有限公司 Wind driven generator
CN102594005A (en) * 2012-02-29 2012-07-18 大连亿斯德制冷设备有限公司 Motor used for refrigeration compressor
CN102751817A (en) * 2012-06-15 2012-10-24 陈震 Supplementary cooling device and supplementary cooling method of air-cooling power generator
CN104343639A (en) * 2013-07-23 2015-02-11 温州音易鞋业有限公司 Electric vehicle charging device
CN104052195A (en) * 2014-07-14 2014-09-17 湘潭电机股份有限公司 Air cooling method and device of permanent magnet motor
EP3297137A1 (en) * 2016-09-20 2018-03-21 Siemens Aktiengesellschaft Cooling of an electrical generator

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US6633098B2 (en) * 2001-08-29 2003-10-14 Hitachi, Ltd. Alternator for use in a vehicle
CN100433509C (en) * 2006-09-22 2008-11-12 江门市金羚排气扇制造有限公司 Small power cage type induction motor
US8390157B2 (en) * 2009-05-14 2013-03-05 Shin-Etsu Chemical Co., Ltd. Cooling mechanism for axial gap type rotating machines
CN201594779U (en) * 2009-12-25 2010-09-29 新誉集团有限公司 Independent wheel hub traction apparatus
CN201966747U (en) * 2011-03-11 2011-09-07 华小平 Ventilating and radiating structure of direct-driven permanent magnet wind driven generator

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