CN104810997B

CN104810997B - Permanent magnet direct-driving aerogenerator system and its collaborative drying control method of sealing

Info

Publication number: CN104810997B
Application number: CN201510178522.5A
Authority: CN
Inventors: 马盛骏; 辛乳江
Original assignee: Xinjiang Goldwind Science and Technology Co Ltd
Current assignee: Jinfeng Technology Co ltd
Priority date: 2015-04-15
Filing date: 2015-04-15
Publication date: 2017-03-01
Anticipated expiration: 2035-04-15
Also published as: KR20160123207A; KR101724895B1; CN104810997A

Abstract

The invention provides a kind of permanent magnet direct-driving aerogenerator system and its collaborative drying control method of sealing, permanent magnet direct-driving aerogenerator system includes wind-driven generator and current transformer, current transformer includes rectification unit, DC master row and inversion unit, inversion unit is connected with electrical network, it is provided with power-cutting switch on the first transmission line of electricity between rectification unit and wind-driven generator, permanent magnet direct-driving aerogenerator includes stator and rotor, also include air supply system, net side falls power-cutting switch, switch controller and jet flow sealing device, switch controller and air supply system, power-cutting switch and the net side connection of falling power-cutting switch, for controlling power-cutting switch and the net side unlatching of power-cutting switch and disconnection, and the startup of air supply system and closing.The Comprehensive Control relying on the heat that stator winding produces and the heat that the when of falling power transmission produces when the present invention is by air-flow that air supply system is produced, wind turbine power generation is using it is achieved that drying is worked in coordination with the sealing of wind-driven generator.

Description

Permanent magnet direct-driving aerogenerator system and its collaborative drying control method of sealing

Technical field

The present invention relates to permanent magnet direct-driving aerogenerator system and its collaborative drying control method of sealing, belong to wind-power electricity generation Technical field.

Background technology

Open-type permanent magnet direct-drive external rotor wind driven electric generator in prior art, relies on natural air cooled, and opening structure is beneficial to certainly So ventilation heat exchange, helps the magnetic after magnetic pole prevents temperature rise exceeded using permanent magnet material and reduces, but electromotor is typically exposed to Under the conditions of exceedingly odious environment (being exposed to wind, frost, rain, snow, sand and dust, salt fog etc.).

1st, the source of motor internal moisture content and its harm in wet environment

(1) source of moisture content

Compared with for home, rain, snow are easier to enter motor internal wet environment, and the source being summed up moisture content is main Have following several：

The wind-driven generator of the nacelle exterior of outdoor operation, impregnating after directly being melted with snow water by drenching with rain, Shao Liangshui Part enters motor internal by motor rotation from annular gap；In wet weather after electromotor quits work, moisture enters to be sent out Motor internal and then condensation；The long-time electromotor stopped transport enters moisture-sensitive condensation because of moisture；The wind-force working in adverse circumstances Electromotor may also suffer from the accidents (draining hole plug) such as sleet water immersion and causes moisture content to enter；Do not press in electromotor production process Technological requirement carries out moisture content remaining etc. in the insulation pore that preliminary drying or dipping lacquer post-drying thoroughly do not cause.

(2) the reason generator insulating easily makes moist

This partly mainly quotes paper《The reason generator insulating easily makes moist is analyzed》Illustrate (author：QiYu Fu QI Yu-fu prints name：In big motor technology year, roll up (phase)：2009(4)).

Air-cooled type electromotor insulate under stoppage in transit state and easily makes moist, and is mainly manifested in leakage current and dramatically increases, insulate Resistance significantly reduces.According to the rules, insulation resistance low to certain numerical value, be do not allow run it is necessary to be dried process.

It is running status and structures shape due to it that air-cooled type generator insulating easily makes moist.Because electromotor is exhausted Edge can only adopt solid dielectric insulation, embed in core slots it is impossible to soak in insulating oil as transformator, nor picture Fully closed combined electric unit GIS is the same, is sealed in full of in the closed metal shell of SF6, the insulation of electromotor can only be exposed to sky In gas.In normal course of operation, the heat that generator core, winding produce will lean on the air of flowing to take away.When electromotor heat production When reaching balance with radiating, within the scope of generator core, winding temperature are maintained at certain numerical value.When electromotor normally runs, Rely on natural air cooled external rotor permanent magnet directly to drive generator and also depend on the air invading from nature and serve as cooling medium.Ferrum The heart, winding temperature can be higher than the temperature of cooling medium air, and after electromotor is stopped transport, unshakable in one's determination, winding temperature is gradually lowered, due to sky The effect that in gap, air gap, air expands with heat and contract with cold, enters substantial amounts of air to reach pressure balance in electromotor.At this moment insulation absorbs The moisture of in the air and make moist, if air humidity is bigger after thunderstorm season, rain, generator insulating makes moist just even more serious.Send out After electrical machine insulation makes moist, leakage current is tens times of normal value even hundred times, insulation resistance be normal value tens/ One.From data analysiss, generator insulating makes moist very seriously, without dried, can not run.Generator insulating makes moist Seriously, it is for the test data angle of insulation.In fact, humidified insulation initial stage, simply surface adsorption moisture, in insulation Portion does not also make moist, and is subject to compared with after water logging with insulation, the moisture of insulating surface or micro, and it is also easy to be dried Many.

The insulation of motor, when air humidity is very big, is made moist and leads to the reduction of insulation resistance to require a very short time, one day Even several hours.This requires the rainy day to have to work against rainwater and enter in electromotor or after rain in time by humid air band in motor Walk.Code has explicit stipulation：Insulation resistance unqualified it cannot be guaranteed that generator operation accidents happened, just in case having an accident, certainly will Cause very big economic loss.Have to pass through dried qualified after could run.

(3) there is the harm that moisture content causes in generator

For electromotor, good insulation is the precondition that motor safety runs, in the stator windings either Slot insulation, layer insulation, phase insulation or binding strap and the outer layer of power outlet, have substantial amounts of pore, hold very much Moisture easily in absorption air, reduces the insulating properties of itself and so that insulating heat-conductive is deteriorated, cause insulation breakdown and then damage Motor, causes the person, equipment safety accident.Relative humidity height easily makes surface coagulate attached water film, when humidity is higher than more than 95%, motor Internal often condense water droplet, make metalwork easy-to-rust, grease becomes damp and rotten, expansion that what insulant had make moist, have feels like jelly Tacky, mechanically and electrically penalty, it is susceptible to insulation breakdown and dielectric surface flashover.In addition, under high humidity environment, mycete is also easy Grow, and the secretions of mycete can corrode metal and insulant, so that insulation is deteriorated rapidly, cause short circuit accident.

2nd, the Macro or mass analysis of prior art

(1) drying mode common in the art

This part will be with reference to paper《The field drying that stator winding insulation in generator is made moist is processed》(author：Lin Jun, Li Yun Sea, strong and vigorous, [middle figure classification number】TM31l [Document code] B【Article is numbered】1004-7913(2009)04—0013—02) In content illustrate.

After generator unit stator winding makes moist, for the different types of cooling, different capabilities and the different generating of damp degree Machine, when being dried process, adopted method is also different, at present the conventional following several drying meanss in scene.(a) stator Iron loss seasoning.This method is practically without operability to the electromotor of maintenance in high-rating generator especially running.(b) Impressed current seasoning.It is passed through electric current to rotor coil, using heat rotor windings produced by copper loss.By live capacity Limit, it is difficult with exchange heating means, therefore typically adopt DC current to heat.The method need to be by electromotor three-phase windings string Branch is untied also dependent on situation and is connected into a loop again by connection.High-rating generator electric current ratio is larger, typically presses winding strands Add direct current.Power supply can adopt the power supply that the power supply of electric barring or other are got, the electromotor of low capacity by rectification The method that multiple stage DC welding machine parallel operation can be adopted.(c) external heat source method.In electromotor wind-tunnel, by stator upper and lower part Deep bead is opened, in stator winding lower disposed electric hot plate or other infra red heating device.The generating to small volume for the method Machine is more effective.(d) three-phase shortcircuit seasoning.By generator unit stator winding exit three-phase shortcircuit, generating set is then made to exist Operating in nominal speed range, by adjusting exciting current, makes stator winding current rise therewith, utilizes electromotor itself electric current Produced heat, is dried to winding.Three-phase shortcircuit drying needs electromotor to possess operating condition in itself.E () hot water follows Ring seasoning.The electromotor of stator bar internal water cooling, the heater in available inner cold water case or temporarily access electric heater By the cooling water heating in inner cold water case, water temperature should not be higher than 70 DEG C, start inner cold water pump, stator bar is dried with hot water circuit Insulation.Stator bar water-cooled generator scene adopts the method, and the object being acted on is the motor of Ground Operation.

In order to insulation system is dried, the scheme (b) in above method has been tried out for permanent magnet direct-driving aerogenerator.

(2) other dry technologies

Paper《Hot-air removal moisture drying is used to maintain after halt turbines》

Author：Chen Hanggeng, Cao Zuqing；Authors' working unit：Southeast China University Nanjing；Parent document：4th national firepower Generation technology Annual Conference collection of thesis (first volume).

Meeting title：4th national thermal power generating technology Annual Conference, the time of meeting：On November 01st, 2003.

Flow through flow passage component using unsaturated humid air after halt turbines, absorb the moisture of residual, make to be dried in machine, There is corrosion after preventing halt turbines.For improving the wettability power of humid air, after first humid air being compressed, pass through heater again Heated, be then passed through again after steam turbine absorbs moisture and discharge." aerofluxuss water capacity oneself be down to desired indicator, then show machine Inside drying, can prevent corrosion.

(3) paper《The quickly drying method of damaged or destroyed by flood motor》

Author：Shen Zhaohu, prints name：In Chinese countryside water conservancy and hydropower year, roll up (phase)：1999(1).

Needed drying by the motor after immersion in water, for shortening drying time, save and funds are dried, have developed a kind of far infrared Temperature control baker.This baker is simple, efficient, practical, easy, low cost of drawing materials.

3rd, open-type cabin outer fan power generator encapsulation scheme technology path is explored

Sealing can be divided into dynamic sealing two big class between the static seal between geo-stationary faying face and relative motion faying face.This In, the sealing position of open-type cabin outer fan power generator has relative motion, belongs to rotatory sealing.Phase is made with it according to sealing member Whether the part of motion is contacted, dynamic sealing can be divided into contact seal and non-contacting seal and no axle envelope.For unlatching Formula cabin outer fan power generator according to contact seal, non-rain, just cannot rely in the drying time of snow period relatively dry Dry air-flow is directly cooled down for a long time to motor internal.Non-contacting seal has labyrinth seal and dynamic seal.Labyrinth seal It is the throttle effect limit leakage using fluid in gap, leakage rate is larger, is generally used for less demanding occasion.Dynamic seal has Centrifugal seal, floating-ring seal, helixseal, pressurized seal, injection sealing, hydraulic seal, magnetic current sealing etc., are by dynamical element Produce pressure to offset the pressure differential of sealing both sides to overcome leakage, it has very high sealing, but energy consumption is big.This kind of sealing is Worked using hydromechanical poised state.If operating condition changes, the very big fluctuation of leakage rate will be caused.

Labyrinth seal is also referred to as labyrinth seal, is mainly used in air seal.It can pass fluid through many throttle clearance with Expand the passage of cavity composition, produce very big energy loss through multiple throttling, Fluid pressure greatly declines.Outside straight drive Sealing part can be constructed by " choke pressure drop " this feature in rotor large scale permanent-magnetic wind driven generator.

Pressurized seal blocks the gap between rotary part and stationary parts using air pressure, to ensure to seal.But The gas source feed of certain pressure to be had, the pressure producing at source of the gas here sealing is more higher than the outer natural environmental stress of motor.Gas Means of press seals is not subject to temperature, rate limitation, is generally used for sealing the little place of both sides pressure reduction.

From the point of view of the relevant representative paper retrieving above, at present, thermal power generation unit in electrical network, water are operated in Power generator group, nuclear power generating sets are generally arranged in the Factory Building of a fixation.Generally, will not be through being invaded by rain, snow in Factory Building Enter.Simply in the case of standing the flooding of flood, the cooling medium (water) that above-mentioned generating set adopts Hydropower Unit is occurring In the case of leakage, the convenience of the service condition maintenance of the generating set of ground handling is all far better than the land of wind energy turbine set operation Go up or offshore wind turbine.Electromotor cooling aspect, the air-cooled facility in making full use of natural environment and performance are excellent More condition while, need to solve and the to be stood severe tests insulation system being electromotor dielectric level.Turn outside permanent magnet direct-drive Among refrigerated environment after sub- wind-driven generator is exposed to wind, sand, rain, snow, the sun are exposed to the sun or shut down, with ground handling throughout the year Environment gap residing for steam turbine generator, gas turbine generator, hydrogenerator is too big, and the repair cost especially having is too Height, work high above the ground (60-100 rice) crane uses needs expense great number to pay.So the work easily carried out on the ground is to wind Even become impossible in power generator.On the other hand, the operation in wind power generating set has also relied on wind weather.Wind wheel Machine drives generator amature to rotate, and generator unit stator induces potential, just can implement three-phase shortcircuit in stator outlet, rely on short circuit Electric current heat production, stator is dried, improves dielectric level.Also need according to wind speed size at that time simultaneously, implement to become the generating of oar indirect control Machine rotor rotating speed, and then control short circuit current, drying tide, these conditions all rely on weather for controling winding heat production.Moreover wind Continue length and affect baking tide effect, straight outer rotor permanent-magnet wind-driven generator quality of driving is big, and heat production requirement is greatly, hot after heat production Conduction time and the mass transfer drying time driving the time of tide are all some hours orders of magnitude, the persistence time length of wind, interruption Property all affect the damp effect of baking.

Inventor finds that in practical operation prior art has following defect：

(1) permanent magnet direct-drive external rotor wind driven electric generator goes to cool down stator core support and rotor outer wall using natural wind, with When a number of natural environment in wind invade machine cavity through generator stator rotor gap, then flowed to vertically by air gap The other end is assembled, and after deposition, light air enters air from back-end sealing extrusion.Flow through motor internal space be gas (vapour), Liquid, solid multiphase flow (being wherein free gas and water steam, rain, snow, salt fog, sand and dust, floccule etc.).They can cause insulating properties Deteriorate, lead to electrical machine insulation electric property, degraded in mechanical properties, remaining resistance to voltage levels and life-span to reduce, ultimately result in insulation Destroy.

(2) it is all terrestrial power generation unit operation more than, in the work high above the ground of 60-100 rice, including realizing various functions, especially It is that cabin carries out service work, usual manpower and materials be unable to and, or even become impossible.Wind-driven generator seals, is dried Measure and its safeguard that (maintenance, change) is differed greatly with the thermal power generation of ground handling, hydroelectric generator operation difficulty. The good method that some ground use for the wind power generating set in high dry running, but carry out, be even difficult to be suitable for by inconvenience.

(3) relying solely on above-mentioned logical air drying methods is dry tack free technology, can't resolve folded inside stator core Piece interlayer make moist after demand is dried.

(4) it is that the air in the weather accompanying each other or the weather that a snowstorm is raging that can not resist the elements carries using open-type structure Rain or the harm of snow intrusion electromotor, " dielectric level reduction " has paid cost for electromotor cooling.

(5), after shutting down, in generator cavity body, in air gap, wet air condensation penetrates into motor, can lead to motor stator, permanent-magnet magnetic Pole surface coating makes moist, and can affect their service life.

Content of the invention

The purpose of the embodiment of the present invention is to provide a kind of permanent magnet direct-driving aerogenerator system and its collaborative drying of sealing Control method, with realize using air supply system produce air-flow, wind turbine power generation when rely on stator winding produce heat And the collaborative drying of heat realization sealing that the when of falling power transmission produces.

For reaching above-mentioned purpose, The embodiment provides a kind of permanent magnet direct-driving aerogenerator system, including wind Power generator and current transformer, described current transformer includes rectification unit, DC master row and inversion unit, described inversion unit with Electrical network connects, and the first transmission line of electricity between described rectification unit and described wind-driven generator is provided with power-cutting switch, institute State permanent magnet direct-driving aerogenerator and include stator and rotor,

Also include air supply system, net side power-cutting switch, switch controller and jet flow sealing device, wherein,

Described stator include stator support, the stator core of periphery wall being arranged on stator support, oar side tooth support and Oar gusset plate, described oar side tooth support is arranged on the oar side axial end of described stator core, and mated with described stator is turned Son has rotary piston sealing ring；

At least one first pore is had on the periphery wall of described stator support, described oar side tooth support offers At least one second pore；

Described stator also includes connecting at least one gas channel of described first pore and described second pore, described gas Circulation road passes through the inside of described stator core；

Described air supply system is connected with described first pore；

Described jet flow sealing device is connected with described second pore, for by the air-flow from described second pore to two Direction drain so as in the annulus that formed of oar gusset plate described in one air flow direction and described rotary piston sealing ring, another stock Air gap between stator described in air flow direction and described rotor；

There is between described DC master row and described wind-driven generator the second transmission line of electricity, described net side falls power-cutting switch It is arranged on described second transmission line of electricity；

Power-cutting switch is connected described switch controller with described air supply system, power-cutting switch and net side, for controlling Described power-cutting switch and described net side fall the unlatching of power-cutting switch and disconnection, and the startup of described air supply system and closing.

Further, permanent magnet direct-driving aerogenerator system also includes being arranged near described wind-driven generator groove portion insulation And/or the humidity sensor of core-lamination stack gap location, described humidity sensor is connected with described switch controller,

Described switch controller, is used for：

Wind energy turbine set for calm or less than incision wind speed in the state of, to humidity sensor detection humidity value sentence Disconnected, if humidity exceedes predetermined humidity threshold, disconnect described power-cutting switch and open described net side and fall power-cutting switch, and Start described air supply system；

In the state of wind-driven generator is in and generates electricity by way of merging two or more grid systems, the humidity value of humidity sensor detection is judged, such as Fruit humidity exceedes predetermined humidity threshold, then start described air supply system.

Further, permanent magnet direct-driving aerogenerator system also includes being arranged near described wind-driven generator groove portion insulation And/or the insulation value measurement mechanism of core-lamination stack gap location, described insulation value measurement mechanism is connected with described switch controller,

Described switch controller, is used for：

Wind energy turbine set for calm or less than incision wind speed in the state of, to described insulation resistance value measurement mechanism detection exhausted Edge resistance value is judged, if described insulating resistance value is less than predetermined insulation resistance standard value, disconnects described power transmission and opens Close and open described net side and fall power-cutting switch, and start described air supply system；

Insulated electro in the state of wind-driven generator is in and generates electricity by way of merging two or more grid systems, to the detection of described insulation resistance value measurement mechanism Resistance is judged, if described insulating resistance value is less than predetermined insulation resistance standard, starts described air supply system.

Further, described jet flow sealing device is the first spiral comb mechanism,

The side of the close described rotor of described oar gusset plate is provided with least one comb air inlet, described comb enters Pass through the corresponding connection of airway between pore and described second pore,

Described first spiral comb mechanism is arranged on the side of the close described rotary piston sealing ring of described oar gusset plate, described On the whole ringwise, described first spiral comb mechanism is connected with described comb air inlet for first spiral comb mechanism, and described One spiral comb mechanism has the first spiral comb, and described first spiral comb reaches described oar gusset plate and described rotor is close In the annulus that seal ring is formed, for producing the air-flow of screw in described annulus,

On the axis direction of described stator, described comb air inlet is located at the middle part of described first spiral comb mechanism, Described first spiral comb mechanism includes the first top spiral comb and the first lower part helical comb,

Centered on described comb air inlet, the first spiral comb away from stator support side is described first top spiral shell Rotation comb, the first spiral comb near stator support side is described first lower part helical comb, in described first spiral comb In the sectional view of tooth, described first top spiral comb tilts to the direction away from stator support, for producing screw Inclination angle be directed away from stator support direction air-flow, described first lower part helical comb is near the direction of stator support inclining Tiltedly, for producing the air-flow at the inclination angle of screw towards the direction near stator support.

Further, the hand of spiral of described first top spiral comb and described first lower part helical comb is contrary.

Further, the hand of spiral of described first top spiral comb is identical with the direction of rotation of rotor.

Further, described first spiral comb also includes the first middle part comb；

Described first middle part comb is arranged on described comb air inlet, and described first middle part comb will enter from described comb The air-flow that pore flows out is shunted so that a part of air-flow flows into described first top spiral comb, another part air-flow stream Enter described first lower part helical comb.

Further, described stator also includes tower side tooth support and tower gusset plate, and described tower side tooth support is arranged on institute State on the tower side axial end of stator core, described rotor also has end cap seal ring,

The side of the close described rotary piston sealing ring of described oar gusset plate is provided with the second spiral comb mechanism, described On the whole ringwise, described second spiral comb mechanism has the second spiral comb, described second spiral for two spiral comb mechanisms Comb reaches in the annulus that described oar gusset plate and described rotary piston sealing ring are formed, for producing in described annulus The air-flow of raw screw.

Further, in the sectional view of described second spiral comb, described second spiral comb props up near stator The direction of frame tilts, for producing the air-flow at the inclination angle of screw towards the direction near stator support.

Further, pass through airway ringwise on the whole between described comb air inlet and described second pore corresponding Connect, or between described comb air inlet and described second pore, pass through the corresponding connection of air ducts separated from one another.

Further, punching retainingf key, the dovetail of described stator core are fixed with the periphery wall of described stator support Groove is set on described punching retainingf key, and described gas channel is connected through described punching retainingf key with described first pore.

Further, described gas channel includes radial air flow passage and axial flow passage, described radial air flow passage Through the inside of described punching retainingf key and described stator core, one end of described radial air flow passage is with described first pore even Connect, the other end is connected with described axial flow passage, and described axial flow passage passes axially through the inside of described stator core Connect with described second pore.

Further, described first pore, described second pore and described gas channel are multiple and quantity is equal, edge Circumference impartial setting, the corresponding connection of multiple described first pores, described second pore and described gas channel, formed a plurality of The independent periphery wall from described stator support is to the current path of described oar side tooth support.

Further, described air supply system includes producing the gas source generator of air-flow of predetermined pressure and to described air-flow Carry out the air supply processing equipment of gas source purification and dried.

Further, described gas source generator be air compressor, described air supply processing equipment include air filter, Cooler, oil water separator and exsiccator.

The embodiment of the present invention additionally provides a kind of sealing of permanent magnet direct-driving aerogenerator system and works in coordination with drying control method, The method is to be carried out based on above-mentioned permanent magnet direct-driving aerogenerator system, and it includes：

To the insulation of the groove portion of wind-driven generator, nearby and/or the humidity of core-lamination stack gap location detects, or to wind The insulating resistance value of the winding of power generator is detected；

Wind energy turbine set calm or less than incision wind speed period, if described humidity exceedes predetermined humidity threshold or institute State insulating resistance value and be less than insulation resistance standard value, then disconnect described power-cutting switch and open described net side and fall power-cutting switch, and And start described air supply system；

Be in, in described wind-driven generator, the period generated electricity by way of merging two or more grid systems, if described humidity exceed predetermined humidity threshold or Described insulating resistance value is less than insulation resistance standard value, then start described air supply system.

The embodiment of the present invention provides a kind of sealing of permanent magnet direct-driving aerogenerator system again and works in coordination with drying control method, The method is to be carried out based on above-mentioned permanent magnet direct-driving aerogenerator system, and it includes：In the snowy or rainy period, Execution is following to be processed：

If wind energy turbine set is calm or less than incision wind speed state, disconnects described power-cutting switch and open described net side Power-cutting switch, and start described air supply system；

If wind-driven generator is in the state generated electricity by way of merging two or more grid systems, start described air supply system,

In the period of no snow and no rain, execution is following to be processed：

Further, after the snowy or rainy period, after making described air supply system open predetermined amount of time, then hold The above-mentioned process in no snow and no period of rain of row.

Further, after starting described air supply system, the rotating speed of wind speed according to wind energy turbine set and/wind-driven generator, The pressure of air supply system output gas flow described in self-adaptative adjustment.

Further, after starting described air supply system, the cooling according to wind-driven generator requires, and adjusts described source of the gas The temperature of system output gas flow.

The permanent magnet direct-driving aerogenerator system of the embodiment of the present invention and its collaborative drying control method of sealing, by switch To air supply system, power-cutting switch and net side, power-cutting switch carries out on-off control to controller, is on the one hand capable of to wind-force The annulus of the oar gusset plate of electromotor and rotary piston sealing ring formation carries out air seal, thus effectively resisting extraneous severe Air-flow (such as rain or snow) is allowed to be not easily accessible motor internal, in addition it is possible to using back draught go to stator and rotor it Between air gap be dried, take away from stator interior discharge wet gas, meanwhile, by generate electricity when winding produce heat with And the heat that the when of falling power transmission winding produces, motor internal is dried so that wet gas are discharged between stator and rotor Air gap, and taken away by the air-flow from air supply system, thus realizing sealing collaborative drying.

Brief description

Fig. 1 is the structure sectional view of the permanent magnet direct-driving aerogenerator of the embodiment of the present invention one；

Fig. 2 is the partial structural diagram of Fig. 1；

Fig. 3 be Fig. 1 in along A-A to schematic cross-section；

Fig. 4 is the axial direction of the air flow path within the stator core of permanent magnet direct-driving aerogenerator of the embodiment of the present invention one Schematic diagram；

Fig. 5 is the stator interior air-flow acquisition approach of the permanent magnet direct-driving aerogenerator of the embodiment of the present invention one；

Fig. 6 is the stator structure schematic diagram of the permanent magnet direct-driving aerogenerator of the embodiment of the present invention two；

Fig. 7 is the partial structural diagram of Fig. 6；

Fig. 8 is the overall air flow path schematic diagram of the permanent magnet direct-driving aerogenerator of the embodiment of the present invention；

Fig. 9 is the overall control structure schematic diagram of the permanent magnet direct-driving aerogenerator system of the embodiment of the present invention；

Figure 10 is the external structure schematic diagram of the permanent magnet direct-driving aerogenerator of the embodiment of the present invention；

Figure 11 is the close-up schematic view at the A of Figure 10.

Drawing reference numeral explanation：

1- stator support；2- first pore；3- oar gusset plate；4- the first spiral comb mechanism；41- the first top spiral comb Tooth；42- the first lower part helical comb；5- second pore；6- oar side tooth support；7- punching retainingf key；8- stator core；9- air-flow Passage；91- axial passage；92- radial passage；10- tower side tooth support；11- tower gusset plate；12- air supply system；13- main pipe； 14- arm；15- rotor field spider；16- rotary piston sealing ring；The end link of 17- winding；18- magnetic pole；19- rotor endcap；20- end Cover seal ring；21- comb air inlet；211- upper air exports；212- lower stream of airflow exports；22- airway；In 23- first Portion's comb；24- the second spiral comb mechanism；241- the second spiral comb；Power-cutting switch K1；The net side K2 of falling power-cutting switch；First Transmission line of electricity L1；Second transmission line of electricity L2.

Specific embodiment

First, first the applied environment to the embodiment of the present invention and know-why carry out generality introduction.

1. the drying theory of solution and technical support

So-called " drying " is it is simply that deviate from the process of liquid (mainly moisture) from material, and most dried object Expect for porous media, therefore porous media dry run is exactly the problem sloughing liquid (or moisture) from porous media.It is dried Subject system includes drying theory, dry technology and drying process.The feature of dry run is summarized as：(1) dry run is One typical unstable state irreversible process, its process changes over and has irreversible characteristic；(2) dry run has Multi-phase multi-component participates in, therefore will be related to alternate and phase-change heat transfer mass transfer, and influence factor is numerous, relation is complicated；(3) in dry run In, heat and mass intercouples；(4) dry run and object materials property, close containing wet component and state relation.So, Academicly necessarily it is related to irreversible thermodynamics, THERMODYNAMICAL STUDY, hydrodynamics, rheology, surface.

The drying meanss of practical engineering are a lot, get on to classify from dewatering Principle, and moisture is undergone phase transition and escaped with steam, with And aqueous water and water become vapour after transmit and occur simultaneously.From dewatering, the wet exchange of mechanical dehydration, contact and heat can be divided into de- Water (includes two kinds of heat drying methods not changing material surrounding medium pressure and changing material surrounding medium pressure.) here, right The purpose that motor internal is dried is to maintain at groove portion insulation and iron core, the permanent magnet machine rotor magnetic pole composite protection layer of winding State in relatively dry.Heated drying method is a kind of most widely used main drying meanss.In heated drying method, carry to material Energizing quantity, makes the moisture in material become vapor, then removes from material again.Heated drying is divided into convective drying, conduction again Drying, radiant drying, high-frequency dielectric drying, sound wave are dried and combination drying.The desiccant of convective drying is hot gas, its drying Process is the macroscopic motion by hot gas around material, to material heat supply so that material internal moisture is evaporated, and by macroscopic view Convection current takes the moisture of surface of material or vapor in large space to.Hot-air is exothermic medium and moisture absorption medium.Shadow Ring the many factors of convective drying, mainly have hot gas parameter and material size, shape and characteristic.Hot gas parameter is primarily referred to as Temperature, moisture concentration and speed.The impact to rate of drying for the hot gas temperature is maximum, with the raising of the temperature of hot gas, does Dry speed is with hot gas temperature linear increase.The impact to rate of drying for the hot gas flow velocity is inconspicuous, but rate of drying is with air The increase of moisture concentration slightly reduces, and the impact to thermal convection current dry run is also apparent from material structure with size.Test is ground Study carefully result to show, for lump material, drying time is relevant with material thickness R, and material is thicker, and drying time is longer.Conduction is dry Dry feature is that dry tenacity is high, the 1-2 order of magnitude higher than convective drying intensity, and hot-fluid gos deep into inside material, makes material internal moisture Evaporation, and the gasification rate of water to be higher than steam remove speed, therefore produce pressure reduction, steam is to excessive in the presence of this pressure reduction Go out.Radiant drying process is relevant with the radiation of radiation source and material or optical characteristics.Result of study shows：The radiation of infrared source Wavelength is advisable with 0.4 15 microns.

The feature of convective drying process：When the higher air-flow of temperature and wet stock directly contact, gas, solid two alternate generations Be heat, the process simultaneously transmitted of matter.Under any circumstance, heat (sensible heat) is always transmitted to low temperature position by high-temperature position, and material is total It is to be passed on from one to another to low partial pressure phase from high partial pressures.Temperature is the criterion in heat transfer direction, and partial pressure is the criterion in mass transfer direction.It is clear that As long as in the air does not reach saturation (nonsaturated air) containing steam, this air with synthermal under water contact its mass transfer direction ratio by water To gas.Material surface temperature is less than gas flow temperature, and gas heat-transfer is to solid.Water vapor partial pressure in air-flow is less than surface of solids water During partial pressure, water is gasified and is entered gas phase, and the moisture within wet stock diffuses to surface in the form of liquid or steam.Therefore, Convective drying is a heat, matter back transfer process.

2nd, moisture is in gas-solid two alternate balances

Water can be different in solid material form exist, be combined with solid phase in a different manner.Work as solid material When there is crystal structure, wherein may contain a certain amount of water of crystallization, this part water is combined with solid phase with chemical force.Work as solid Material system porous, its contained humidity may be present in pore and acted on by hole wall capillary force.When surface of solids tool When having adsorptivity, its contained moisture is then because being incorporated in the inner and outer surfaces of solid by absorption affinity.The above is by change The water that educational level or physical-chemistry force are combined with solid phase is referred to as combining water.When material is aqueous more, except a part of water and admittedly Outside body combines, remaining water is simply mechanically attached to the surface of solids, and these water claim unbound water.In conjunction with water and unbound water Basic distinction is that the equilibrium vapour pressure of its performance is different.The property of unbound water is identical with pure water, the equilibrium vapour pressure of its performance It is the saturated vapor pressure of synthermal lower pure water.Then different in conjunction with water, because of the presence of chemically and physically chemical force, the steaming being showed Vapour pressure is less than the saturated vapor pressure of synthermal lower pure water.As long as with the presence of unbound water regardless of whether its quantity in material, its Equilibrium vapour pressure will not change, always the saturated vapor pressure of pure water.When water content reduces, unbound water has not existed, hereafter Removing is with reference to weaker water first, and remaining is with reference to stronger water, thus equilibrium vapour pressure is gradually reduced.If solidss Moisture in material all belongs to unbound water, as long as then air does not reach saturation, and has enough times of contact, and all of water is all in principle To be taken away by air, just as the water on road after rain is dried.But, in the presence of having with reference to water, situation is just different. Synthermal wet solid is skimmed over the air of relative humidity ψ, long-time after, the water content of solid material by by original reduction, But impossible adiabatic drying, the limit that material is dried under specified air conditionses, the balance being referred to as under this air condition is aqueous Amount.The moisture that the designated air of all energy is taken away is referred to as free moisture.Whether the combination of water is the property of solid material, with air State is unrelated.When relative air humidity ψ is larger for solid aqueous amount relatively low (all belong to and combine water), not only both contacts can not reach To the purpose of dry materials, moisture can also proceed to solid phase from gas phase, that is, hygroscopic effect occurs.The getting damp as one of cookiess. Whole dry run can be divided into constant rate drying period and falling rate drying period, and the heat transfer of each drying stage, mass transfer have respective Feature.In falling rate drying period, the Changing Pattern of dry rate is relevant with material propertiess and its internal structure.In constant rate of drying rank Section, substantially has four the reason reduction of speed：(1) actual pneumatization reduces；(2) the interior shifting in gasification face；(3) equilibrium vapor pressure Fall；(4) moisture diffusion of solid interior is extremely slow.

3rd, the straight macroscopic properties driving the internally dry process of outer rotor permanent-magnet wind-driven generator

(1) between generator amature permanent magnet material magnetic pole composite protection layer appearance and stator outer surface and dry air Moisture, heat transfer rule

Brief analysis power generator rotor magnetic pole composite protection layer appearance and stator (unshakable in one's determination and winding) outer surface with dry Between dry air thermal mass exchange mechanism.

Hand in the outside heat of power generator rotor magnetic pole composite protection layer appearance and stator (unshakable in one's determination and winding), quality In changing, the external agency boundary-layer (or boundary region) being δ in their surface thicknesses plays an important role.In this boundary-layer, water Divide the distribution of (including aqueous water and steam) concentration, the speed of external agency hot-air and temperature and pressure, different from motor Portion's environment large space.

In the dry run of rotor magnetic pole, concentration, temperature, pressure, the speed phase not to the utmost of the Changing Pattern in boundary-layer With.In 0- δ boundary region, in motor, dried medium speed is ascending, temperature from low to high, therefore the velocity gradient of external agency Consistent with the direction of thermograde, but moisture concentration is from high to low, and from high to low, moisture gradient, vapor partial pressure are terraced for vapor partial pressure Degree is contrary with velocity gradient, thermograde.The fact that in the contrary phenomenon of gradient and boundary-layer, humidity concentration is high, all make material to Extraneous moisture transmission capacity reduces, and so that rate of drying is reduced.But due to larger along boundary-layer δ to 0 direction gradient, thus promote The heavier air flow surface of material of external agency middle-molecular-weihydroxyethyl, the lighter vapor of molecular weight is flushed between electric machine rotor In air gap, meanwhile, hot-air brings heat again, and being poured into of hot-air also makes boundary-layer be destroyed, then enhance Conduct heat and be dried.

(2) generator amature permanent magnet material magnetic pole composite protection layer appearance and stator exterior mass exchange quantitative analyses

In constant rate of drying period, prevent to power generator rotor magnetic pole composite when vapor passes through boundary-layer with diffusion way When sheath appearance and the outer dry air transmission moisture of stator (unshakable in one's determination and winding), their moisture transmission and dry air between Amount, with convective mass transfer formulae express：

The biodiversity flow rate that material outwardly transmits=(convective transfer coefficient with chemical potential as transport potential) × (material The difference of the humid air chemical potential in surface and external agency (in the applied environment of the present invention, specifically corresponding to dry air)), its In, in the applied environment of the present invention, material mentioned here specifically can be with respective rotor magnetic pole overcoat and stator surface Part, medium corresponds to dry air.

When boundary-layer thermograde very little, their moisture transmission with external agency are transmitted with vapor partial pressure for steam Gesture, its vapor migration metric density=(with vapour pressure for passing the convective transfer coefficient of wet gesture) × (surface of material vapour pressure and outside The difference of medium steam pressure) × 760/ atmospheric pressure

In falling rate of drying period, then with moisture concentration u relatively as moisture (containing steam) from surface of material to surrounding medium Transport potential, its moisture transmission capacity=(convective transfer coefficient with moisture concentration as MASS TRANSFER POTENTIAL) × (surface of material moisture concentration with The difference of equilibrium moisture content concentration).

(3) penetrate into moisture in manufacturing link power generator rotor magnetic pole and humid air leaves hidden danger

Permanent magnet material magnetic pole overcoat, magnet steel and the filling of rotor rim wall gap being made up of galss fiber reinforced resin Bonding agent, adsorbs air, vapor in these link spaces.Isocyanate groups in the many components bonding agent using Sizing material meets water cure, and the release with carbon dioxide, leads to the formation of foamed polymer.

Generator amature vertical axes laying state carry out vacuum injecting glue, permanent magnet material magnetic pole upper 2/3rds be full of viscous After connecing agent, in the presence of vacuum pressure reduction, inside and outside differential pressure here close to vacuum, but at lower 1/3rd, the closer to Gum-injecting port, is less than top in this region inside and outside differential pressure of injecting glue later stage, outer surface is to be weaker than upper area to the pressure of glass-fiber-fabric, Previously carried substantial amounts of air, vapor in glass-fiber-fabric, especially it is to be noted that：43 degree Celsius of the attached water including gasification under vacuum Will vaporize.Glass-fiber-fabric fabric genus polyporus material, using front carrying humid air moisture content, space network provides in infiltration Period wraps up the material conditions of humid air.Heating and gasifying is equivalent to pressurization and is extruded referred to as bubble in evacuation, and glass-fiber-fabric is compiled Fabric genus polyporus material space network meets the essential condition of steam gasification core substance structure simultaneously.

(4) in generator stator core and groove, winding heat transfer combines water exclusion mechanism

To generator unit stator vacuum paint dipping process, run using sending out in process, stopping process, climatic season alternation procedure Various environment correspondences residing for motor material rise to existing theory and go analysis to solve with technology.By stator core (solid skeleton) It is positioned in " porous material between lamination, between the wire of winding and multilamellar (macromolecule) insulant, between groove interior insulation etc. Material " attribute category.Gas, the thermal convection current of liquid seepage, liquid phase water evaporation and gas phase between the conduction of heat within stator material, space The phase-change heat transfer of steam coagulation；Water between stator interior and material and environment, vapor and air (saline mist) quality expand Scattered mass transfer category；Rely on wire heat production, cause stator interior storeroom gas (vapor and dry air) state change (phase Become：Liquid phase water evaporation or steam coagulation), when material is in heating process, steam quality therein can be because of phase transformation Change, thus cause storeroom, material internal water-vapour density distribution can change, form (the drive of diffusion of water-vapour density gradient Power)；The change of inner aqueous rate and envionmental humidity balance each other (inside humid air humidity and air gap outside motor, in material The size of the humid air humidity in portion decide inside and outside the mass transfer of vapor be vapor direction of transfer)；The porous of verification The rule of material shows：The temperature of season and climatic factor, humidity change can directly result in insulation resistance value changes；Scheme on evidence As data display：Winding temperature rises the temperature scenario that rule does not react natural wind cold side far-end between lamination, in porous material Heat production air pressure change in portion's shows rapid increase, but due to various places inside reveal approach inconsistent it may appear that drop of pressure speed Inconsistent scene.Particularly importantly：Between material internal lamination, wire and multilamellar (macromolecule) insulant, groove interior insulation Between itself space that can be provided by of feedwater steam intervention be the premise that above-mentioned mechanism exists with porosity.

Under strong magnetic field action, when water is magnetized, the state that hydrone itself combines also is changed into short chain from long-chain so that water Easily infiltrate in the thin seam of hard core-lamination stack, promote the capillarity between lamination；Water is made to be easier to penetrate into through vacuum pressure In hard porous material after dipping lacquer, so that the form generation after corrosion unshakable in one's determination is changed, be changed into loose and taken away by current Sediment shape thing.

(5) the heat moisture transfer law in power generator rotor magnetic pole composite protection layer

In generator amature permanent magnet material magnetic pole galss fiber reinforced resin overcoat, the porous that these have " capillary " is wet In the heat drying process of material, when material moisture content is less, in material, moisture is transmitted based on vapor migration, when material is wet When content is larger, in material, moisture part moves to the evaporation layer of material with form of liquid water, after here evaporation again in vapour form Removal.When evaporation starts, evaporation layer, near material surface, then gradually moves to material internal, when heating is strongly so that make Become the violent gasification of material internal moisture, and when steam removes speed less than gasification rate, water and vapour volume acutely increase.Can It is to there is larger flow resistance in porous material space, thus forming larger barometric gradient in material, this pressure Power gradient is exactly to cause the driving force of vapor movement.In addition, on the channel wall of porous material capillary porosity water liquid film flow, It is the important form that aqueous water migrates in material, this migration continuously feeds aqueous water to evaporation layer, thus enhancing steaming Send out.When in material, moisture Concentraton gradient is consistent with thermograde direction, its moisture transmittance process is represented by：

Moisture flow rate in material=(the moisture current density caused by moisture Concentraton gradient in material)+(by temperature in material The moisture transmission density that difference causes)+(the moisture transmission density being caused by pressure differential in material).

Decision is combined by three gradient moisture gradients, thermograde and barometric gradient.

4th, wind-driven generator working environment and sealing mechanism are analyzed in the work process of blower fan, and oar side is usually just right Upwind, windward always flow shock generator unit stator support can rebound, sputter, then with rotary piston sealing ring clash into back reflection, Accumulation, causes the restorative rising of stream pressure (when comparing to flow), these air-flows will to oar gusset plate and rotary piston sealing ring it Between ring-type air gap in invasion.

Embodiments of the invention are exactly directed to this technical problem and propose.The know-why of the embodiment of the present invention is profit With the gas channel in permanent magnet direct-driving aerogenerator stator core, internal for unit source of the gas is incorporated into the axial end of stator core On face, and the annulus being formed for oar gusset plate and rotary piston sealing ring arranges jet flow sealing device (in preferred embodiment In, spiral comb mechanism is set at the annulus that oar gusset plate and rotary piston sealing ring are formed), thus blower fan stator and Build pressure-fired environment in the inner space being formed after rotor combination, to resist extraneous severe air-flow (gas, liquid, solid multiphase flow, its In be free gas and water steam, rain, snow, salt fog, sand and dust, floccule etc.) invasion." pressure-fired " described in the embodiment of the present invention is Refer to by air-flow produced by the source of the gas within electric system, the pressure producing at rotor " annular seal gap " place is more than outer Boundary flowing the pressure producing in this porch, being sized to of pressure makes the air-flow in the external world cannot be introduced into motor internal and be Can.Wherein, above-mentioned severe air-flow is primarily referred to as rainwater biphase gas and liquid flow or wind and snow Dual-Phrase Distribution of Gas olid, under certain extreme case There is gas, liquid, solid multiphase flow, for example, be free gas and water steam, rain, snow, salt fog, sand and dust, floccule etc..These severe air-flow masters The atrocious weather situation such as rain to be come across or snow is descended, and therefore, the device of the embodiment of the present invention is primarily to resist these evils Bad air-flow and design, and under the weather being normally dried, the device of the embodiment of the present invention can not be used, and allow dry gas stream Enter in wind-driven generator, for being dried to blower fan, cooling down.

Below in conjunction with accompanying drawing, embodiments of the present invention is described in detail.

Embodiment one

The permanent magnet direct-driving aerogenerator system of the present embodiment includes wind-driven generator and current transformer, here on the whole On the basis of, also include air supply system, net side power-cutting switch, switch controller and jet flow sealing device, each by this system The work compound of individual part, to realize sealing and the drying of wind-driven generator.Respectively various pieces are illustrated below.

As shown in figure 1, it is the structure sectional view of the permanent magnet direct-driving aerogenerator of the embodiment of the present invention one.For the ease of Top in Fig. 1 can be defined as oar side (during blower fan work, oar side is typically understood in the face of weather side) by description, under inciting somebody to action Side is defined as tower side (during blower fan work, tower side typically can be in the face of downwind side), and horizontal direction is defined as radially (with whole Radial direction for centered on individual blower fan), vertical direction is defined as axially (along the direction of the rotating shaft of wind-driven generator).

Wind-driven generator in the present embodiment includes stator and rotor two parts, and Fig. 1 shows wind in sectional view Power generator structure.Wherein, stator includes stator support 1, the stator core 8 of periphery wall being arranged on stator support 1, oar side tooth Pressing plate 6 and oar gusset plate 3, oar side tooth support 6 is arranged on the oar side axial end of stator core 8.Here, stator support 1 Periphery wall refer to connect or adjacent with the punching retainingf key 7 (referring to Fig. 3) of stator core 8 or fixed stator iron core 8 Side wall, i.e. the outermost part of stator support 1.Additionally, the rotor mating with stator has rotary piston sealing ring 16, rotor seal Ring 16 is located at oar side, forms annulus with oar gusset plate 3.

In above-mentioned stator structure, at least one first pore 2 can be offered on the periphery wall of stator support 1, At least one second pore 5 is offered on oar side tooth support 6.Stator also includes connecting the first pore 2 and the second pore 5 extremely A few gas channel 9, gas channel 9 passes through the inside of stator core 8.

In addition to wind-driven generator, permanent magnet direct-driving aerogenerator system also includes air supply system and fluidic seal dress Put, air supply system is used for jet flow sealing device supply gas, and this air supply system is connected with the first pore 2, and fluidic seal dress Put and connect with the second pore 5, by jet flow sealing device by the air-flow from the second pore 5 to both direction drain so as in One air-flow (as Fig. 1 top be approximately towards left arrow) flows to the annulus that oar gusset plate 3 and rotary piston sealing ring 16 are formed Gap, this strand of air-flow is mainly used in annulus is sealed, and to resist the invasion of extraneous severe air-flow, another strand of air-flow is (such as Fig. 1 top be approximately towards right side arrow) air gap that flows between stator and rotor, this strand of air-flow be mainly used in stator, turn Sublist face, magnetic pole surfaces are dried, and take away the moisture of motor internal discharge.

In order to discharge the moisture of motor internal, the permanent magnet direct-driving aerogenerator system of the present embodiment further relates to unsteady flow The control of device, thus using wind turbine power generation when rely on stator winding heating (include normal power generation when heat release and Power transmission is fallen by current transformer and makes heating in winding) stator interior is dried, moisture is discharged to stator surface and fixed In air gap between rotor.Wherein, as shown in figure 9, current transformer includes rectification unit, DC master row and inversion unit, inversion Unit is connected with electrical network.It is provided with power-cutting switch K1 on the first transmission line of electricity L1 between rectification unit and wind-driven generator, There is between DC master row and wind-driven generator the second transmission line of electricity L2, the net side K2 of falling power-cutting switch is arranged on the second power transmission line On the L2 of road.Additionally, permanent magnet direct-driving aerogenerator system also includes switch controller, it is with air supply system, power-cutting switch K1 with And the net side K2 of falling power-cutting switch connects (dotted line in Fig. 9 represents control annexation), for controlling power-cutting switch K1 and net side The unlatching of the K2 of falling power-cutting switch and disconnection, and the startup of air supply system and closing.

When opening air supply system by switch controller, jet flow sealing device will spray air-flow, thus realizing oar side The sealing of annulus, also can produce the air-flow flowing through air gap between rotor and stator simultaneously, thus to stator, rotor surface, magnetic Pole surface is dried.Meanwhile, when blower fan is in generating state, stator winding inherently has electric current to flow through and produce heat Amount, when blower fan is in non-power generating state, can make power-cutting switch disconnect and the closure of falling power-cutting switch by switch controller, this Sample relies on electrical network, and power transmission equally enables to stator winding heat release.Stator winding heating can be dried to stator interior, Moisture is discharged to the air gap between stator surface and rotor, then coordinates the air-flow that jet flow sealing device produces, by discharge Moisture is taken away, thus realizing being dried effect to motor internal.As can be seen here, by air supply system, jet flow sealing device, around Group generating heat release control and the coordinated of winding fall power transmission heating control, are capable of the close of blower fan severe air-flow to external world Multiple functions such as envelope, stator, rotor surface drying, stator interior drying, are truly realized wind-driven generator interior sealing collaborative dry Dry, and pass through switch controller to air supply system, power-cutting switch and net side fall power-cutting switch reasonable control, can be according to outer Boundary's environment (beneficial to weather condition) and blower fan state in which (generating state or stopped status etc.) carry out reasonably sequential Control.

Respectively the major part of above-mentioned permanent magnet direct-driving aerogenerator system is described in detail below：

(1) jet flow sealing device

Preferably, the concrete structure of jet flow sealing device is the first spiral comb mechanism 4, as shown in Fig. 2 it is Fig. 1's Partial structural diagram, the figure shows the active sealing structure using spiral comb.As depicted in figs. 1 and 2, in oar gusset plate The side of 3 close rotor is provided with least one comb air inlet 21, passes through to lead between comb air inlet 21 and the second pore 5 Trachea 22 is corresponding to be connected, and the side of the close rotary piston sealing ring 16 of oar gusset plate 3 is provided with the first spiral comb mechanism 4, the On the whole ringwise, the first spiral comb mechanism 4 is connected with comb air inlet 21, the first spiral comb for one spiral comb mechanism 4 Mechanism 4 has the first spiral comb, and the first spiral comb reaches the annulus that oar gusset plate 3 and rotary piston sealing ring 16 are formed In, for producing the air-flow of screw in annulus.

In said structure, achieved by the first pore 2, gas channel 9 and the second pore 5 and internal source of the gas is produced Air-flow be incorporated on the axial end of stator core 8, and then, then by airway 22 and be arranged in oar gusset plate 3 Comb air inlet 21, air-flow is drawn out to the first spiral comb mechanism 4 oar gusset plate 3 from the second pore 5, thus in annular Spiral air flow is produced in gap.

Wherein, the first pore 2, the second pore 5 and comb air inlet 21 can also be able to be triangle, ellipse for circle Shape.Additionally, pore can also be other shapes of gas port etc., in a word, as long as air-flow can be turned on.Preferably, on Stating pore is circular pore, and circular pore can reduce the flowing on-way resistance to air-flow.

In actual application, can be by suitable for the end of rotary piston sealing ring 16 outwardly and by rotary piston sealing ring 16 end is made to relatively thin (as shown in fig. 1) such that it is able to ensure that spiral comb has enough length, fully sends out Wave the effect of spiral stream guidance.

By the above-mentioned stator structure with the first spiral comb mechanism 4, the air-flow of stator interior can be incorporated into On the axial end of stator core 8, and then spiral gas is produced by the first spiral comb mechanism 4 being arranged in annulus Stream, because spiral air flow has certain airtight effect in itself, therefore, it is possible to produce pressure-fired environment in annulus, from And extraneous severe air-flow (such as rain or snow that the annulus resisted between oar gusset plate 3 and rotary piston sealing ring 16 invades Deng), it is allowed to be not easily accessible motor internal such that it is able to extend the service life of permanent magnetism magnetic pole 18, prevent motor internal device " absolutely Edge level reduces ", reduce motor and be subject to the risk that corrodes of severe air-flow (such as rain or snow etc.) and enable the insulating reliability must To guarantee.

Further, in fig. 2 it can be seen that comb air inlet 21 may be located at the middle part of the first spiral comb mechanism 4, Centered on comb air inlet 21, the first spiral comb is divided into two parts, wherein, will be far from the first spiral shell of stator support side Rotation comb is referred to as the first top spiral comb 41, and the first spiral comb that will be close to stator support side is referred to as the first lower part helical Comb 42.

Preferably, the hand of spiral of the first top spiral comb 41 and the first lower part helical comb 42 contrary such that it is able to Form two strands of oppositely oriented air-flows, play the more preferable effect shunting and sealing.

Further, as can be seen that the first top spiral comb 41 is to the side away from stator support from the sectional view of Fig. 2 To inclination, the first lower part helical comb 42 tilts near the direction of stator support.The inclination angle of spiral comb will change to gas The direction of the active force of stream, thus increasing the advanced speed of the air-flow of the screw incline direction towards spiral comb, joins The oppositely oriented feature of lower spiral comb of closing is such that it is able to form two bursts of screws in opposite direction and along upper and lower two Direction accelerates the air-flow advanced, thus forming reverse double-helix sealing, greatly increases the sealing effectiveness of spiral comb.Additionally, wind Upper and lower two strands of air-flows due to the motion of rotor, also can be driven by machine at work to both direction, can improve further reversely Double spiral seal effect.

Specifically, in the part of the first spiral comb mechanism 4, the mass motion of air-flow can be divided into approximately along fixed The screw of circumferencial direction of son and the linear motion approximately along axis stator direction.For Fig. 2, if in Fig. 2 All spiral comb be and be horizontally disposed with (level mentioned here only be the plane shown in Fig. 2 in), then the spiral of air-flow Direction will be substantially in plane that is vertical with paper and being in level (plane that i.e. in the middle part of Fig. 2, comb 23 is located), simultaneously Air-flow will in the form of both direction up and down from screw to Fig. 2 advance, and work as spiral comb direction be not horizontally oriented and When being to have certain angle of inclination, the such as first top spiral comb 41 is to be inclined upwardly, then the air-flow advanced to above Fig. 2 Screw is no longer level, and the inclination angle of screw is directed away from the direction of stator support, in the same manner, the first lower part helical Comb 42 produce screw inclination angle towards near stator support direction air-flow, such be designed to accelerate air-flow to Advancing in the direction of flowing, and can play the effect more preferably resisting external air flow.

Further, comb 23 in the middle part of in the of first are also provided with comb air inlet 21, the first middle part comb 23 sets Put on comb air inlet 21, the first middle part comb 23 is shunted the air-flow from comb air inlet 21 (as Fig. 1 and Fig. 2 institute Showing) comb air inlet 21 is divided into upper and lower two air stream outlets by the first middle part comb 23, i.e. upper air outlet 211 and bottom Air stream outlet 212) so that a part of air-flow is flowed to the direction away from stator support 1 by the first top spiral comb 41, separately A part of air-flow passes through the first lower part helical comb 42 near the flowing of the direction of stator support 1.

It should be noted that first middle part comb 23 be not required part it is also possible to make comb air inlet 21 directly facing First top spiral comb 41 and the first lower part helical comb 42, you can to omit the first middle part comb 23, make comb air inlet , against the initiating terminal of the first top spiral comb 41, another part is initial against the first lower part helical comb 42 for 21 part End, thus also can be shunted air-flow.Only, in the case of comb 23 in the middle part of setting first, air-flow can be reduced Loss on pressure and flow velocity, upper and lower two strands of spiral air flows are preferably isolated.

In the first above-mentioned spiral comb mechanism 4, centered on comb air inlet 21, from the air-flow meeting of internal source of the gas It is divided into two strands of air-flows.

On the one hand, the gas moving along whole annulus downward spiral can be produced by the first lower part helical comb 42 Stream, this strand of air-flow, after the first lower part helical comb 42, is constituted " forced draft annular barrier ", by " combined helical comb Sealing " (labyrinth seal of the helical structure feature with angle of inclination of the first lower part helical comb 42) is gone actively to resist and is derived from Upwind, " gas-liquid-solid multiphase flow " of motor upwind annular gap to be entered.

On the other hand, can be produced by the first top spiral comb 41 and move upwards along whole annulus spiral Air-flow, this strand of air-flow, after the first top spiral comb 41, sets up enough pressure, composition for auxiliary pressure seal air-flow While " forced draft annular barrier ", by " combined helical labyrinth seal " (" the first top spiral comb 41 with inclination The labyrinth seal of the helical structure feature of angle ") enter motor gas-gap (i.e. air gap between rotor on the right side of Fig. 1), go to do Dry motor internal surface, then collect in vertically again stator end cabin side (i.e. tower side tooth support 10 and rotor endcap 19 it Between), after enter in atmospheric environment through the annular gap between end cap seal ring 20 and tower gusset plate 11.This strand spiral upwards Air-flow is the drying air-flow as heat convection mass transfer, for taking away the moisture (motor of stator, rotor surface, magnetic pole surfaces The moisture that inside is discharged due to winding heat production), being so prevented from moisture returns in motor, thus preventing the moisture returning Destroy the insulating properties of the inner insulation material of motor.

Further, the hand of spiral of the first top spiral comb 41 can also be designed to the direction of rotation phase with rotor With.By such design, can more efficiently utilize this strand of air-flow through top spiral comb, on the one hand, Ke Yili With the turning effort of rotary piston sealing ring 16, by the frictional force between rotary piston sealing ring 16 and air-flow, the screw of air-flow is entered Row accelerates so that air-flow can speed up moves upwards, can be reached and the gas between stator and rotor with higher speed Gap (gap having the arrow representing air-flow to pass through on the right side of Fig. 1), improves the drying efficiency to motor, on the other hand, enables to When entering the air gap between stator and rotor, strengthening further is dried rotor permanent magnet magnetic pole protection Anti-corrosion glass fiber and increases air-flow The effect of strong resin cladding；Strengthening is dried stator surface simultaneously, facilitates dry air flow field and wet sky in machine cavity, in air gap The higher collaborative e-commerce of gas concentration field, reaches the dry purpose of strengthening.

Need further exist for illustrating, " combined helical labyrinth seal " (i.e. the first top spiral comb 41) of lower section produces Pumping head (end of spiral comb) be directed downwardly in fig. 1 and 2, " the combined helical labyrinth seal " of top produces Pumping head is upward, and can arrange the hand of spiral of the first top spiral comb 41 and the first lower part helical comb 42 For rightabout, you can so that oppositely oriented spiral is formed for boundary two ends with the first middle part comb 23, thus spiral fortune will be produced Dynamic air-flow in opposite direction, thus advantageously in shunting to two air-flows, and strengthen the effect of labyrinth seal, and Because air-flow out is insertion in respective ring week from upper and lower two air stream outlets, form ring week consistent pressure beneficial to " poly- pressure " Strength stream.

In sum, in the technical scheme of the embodiment of the present invention, using pressurized seal technological thought, using spiral comb The pressure of interior jet air in open-type electric machine upwind air inlet between annular gap, set up " part annular space " and " pressure-fired ", to block the gap between electromotor rotary part and stationary parts, prevent upwind air stream carry rainwater or Snow enters this gap, to ensure to seal.The pressure producing at source of the gas here sealing is more higher than the outer natural environmental stress of motor.Build The sealing means erecting open-type wind driven generator and the concrete structure constructing air flow channel.

In sum, above-mentioned sealing mechanism contains static seal and two kinds of sealing states of dynamic sealing from sealing state, The combination containing comb, spiral, three kinds of sealing principles of air pressure from sealing mechanism is such that it is able to fully by multiphase airflow screen Cover outside annulus gap.

Additionally, upwind air stream is carrying after rainwater (or snow) shock wind-driven generator is obstructed and passing through stator coaming plate and is turning After sub- sealing ring 16 (coaming plate), reach the annular gap between oar gusset plate 3 and rotary piston sealing ring 16, rainwater biphase gas and liquid flow or Wind and snow Dual-Phrase Distribution of Gas olid forms pressure in electromotor upwind annular gap.Substantially former using hydromechanical poised state Reason, can calculate the pressure needed for the exit flow as the spiral comb mechanism of pressurized seal element in annular gap and Flow velocity.In the airflow path outlet expanding in cavity of labyrinth seal, construction " open loop helical form conflux chamber ", serve as main pipe and conflux The effect of equal pressures.The sealing of spiral comb combination pressure relies on the enough pressure that source of the gas provides to produce high velocity air, and exports stream Speed, flow are controlled, the change to adapt to upwind air velocity.I.e.：The pressure of pressurized seal can adjust automatically as needed, Realize " self adaptation " to adjust, to reach the less purpose of source of the gas source wasted work.

Additionally, the airway connecting between comb air inlet 21 and the second pore 5 can have the following two kinds form：

1) on the whole ringwise, the form of that is, with the first spiral comb mechanism 4 is the same, and airway 22 is along oar for airway 22 The circumference of side tooth support 6 extends, in 360 degree of annular.The air-flow that multiple second pores 5 can be flowed out by such structure is being justified Comb air inlet 21 is re-fed on circumferential direction such that it is able to make the air-flow entering comb air inlet 21 exist after uniformly being mixed Circumferencial direction upward pressure is uniform.

2) pass through the corresponding connection of air ducts 22 separated from one another between comb air inlet 21 and the second pore 5.This Structure does not need to make the airway 22 of annular, thus relatively easy on part makes.Airway 22 can be according to the second gas Depending on the quantity in hole 5, gas channel as described below is 48, then accordingly, the quantity of airway 22 can be right 48 should be set to.

(2) gas channel within stator core

The source of the gas that gas channel 9 within stator core 8 is used for providing the air supply system 12 of stator interior is incorporated into oar At at least one second pore 5 opening up on side tooth support 6.Specifically, as shown in figure 3, its be Fig. 1 in along A-A to section Schematic diagram.Punching retainingf key 7 is fixed with the periphery wall of stator support 1, (stator core 8 is by many lobes iron core mould for stator core 8 Block combines, and each module unshakable in one's determination is made up of core-lamination stack) there is dovetail groove, this dovetail groove is set on punching retainingf key 7, Thus stator core 8 is fixed on the periphery wall of stator support 1.First pore 2 be may be located at and contacted with punching retainingf key 7 On the periphery wall of stator support 1, gas channel 9 can pass through the pore of punching retainingf key 7 to connect with the first pore 2.

As shown in figure 1, gas channel 9 can include radial air flow passage 92 and axial flow passage 91, radial air flow leads to Road 92 can pass through the inside of punching retainingf key 7 and stator core 8, and one end of radial air flow passage 92 is connected with the first pore 2, The other end is connected with axial flow passage 91, and axial flow passage 91 can pass axially through the inside and second of stator core 8 Pore 5 connects.Wherein, radial air flow passage 92 and axial flow passage 91 can be directly connected to it is also possible to bend through any After reconnect, in a word, as long as radial air flow passage 92 and axial flow passage 91 can be connected.

Additionally, the first pore 2, the second pore 5 and gas channel 9 can be multiple and quantity is equal, circumferentially all Deng setting.Wherein, multiple first pores 2, the corresponding connection of the second pore 5 and gas channel 9, formed a plurality of independent from stator The inwall of support 1 is to the current path of oar side tooth support 6.Preferably, in the lower section of the inside oar side tooth support 6 of stator core 8, Radial air flow passage 92 is redirected into axial flow passage 91 for internal 90 degree in stator core 8, axial flow passage 91 parallel to Motor stator is axially.As shown in figure 4, it is the gas within the stator core of permanent magnet direct-driving aerogenerator of the embodiment of the present invention Flow path schematic diagram, wherein, radial air flow passage is corresponded with axial flow passage, and in figure illustrate only axial flow and leads to Road, the embodiment of the present invention has several gas channels it is preferable that as shown in figure 4, Fig. 4 is the permanent magnetism of the embodiment of the present invention one Air flow path schematic diagram within the stator core of direct wind-driven generator.It is provided with 48 gas channels, their length altogether (L₁、L₂……L₄₈)/internal diameter (d₁、d₂……d₄₈)/absolute roughness (ε₁、ε₂……ε₄₈) preferably identical, circumferentially-spaced it is also Consistent.

(3) air supply system within Wind turbines

As shown in figure 5, the air supply system 12 within Wind turbines (specifically, air supply system 12 can be arranged on stator and prop up Between frame or in cabin space) in source of the gas can take from the pressure generator in cabin.Air supply system 12 is in rain, snow The weather period can resist the elements " biphase gas and liquid flow " and wind and snow " Dual-Phrase Distribution of Gas olid " intrusion；Air supply system 12 is needing drying The time period of motor internal works so that decreasing while generator stator insulator and rotor magnetic pole overcoat are fully dried The energy consumption of source of the gas.Setting gas channel 9 in the stator is connected with air supply system 12, by Wind turbines by the first pore 2 The source of the gas in portion causes in gas channel 9.Air supply system 12 can include produce predetermined pressure air-flow gas source generator and can With air-flow is purified and dried air supply processing equipment.

Gas source generator can be air compressor or aerator etc., and air compressor (or referred to as compressor) is gas Pressure generating apparatus, it is to improve the pressure of air or the machine of conveying air, is also that the mechanical energy supplying prime mover changes into A kind of conversion equipment of air pressure energy.In air compressor work process, the air being in compresser cylinder is rapid Compression, the process that gas is compressed rapidly is an exothermic process, necessarily causes the temperature of compresser cylinder to raise, therefore, one As need to be cooled down.Multi-stage compression air compressor afterbody delivery temperature up to 140 170 DEG C, so high At a temperature of, often it is mixed with certain gaseous state oil and vapor in compressed air, need to arrange cooler cooling compressed air, with preliminary Contained oil and moisture in isolation compressed air, prevent oil and moisture from entering stator core of wind driven generator with compressed air Runner.Therefore, air supply processing equipment can also include air filter, cooler, oil water separator and exsiccator.Wherein, Air filter be used as to filter gas before air inlet compresser cylinder (filter in cabin dust contained by the air and Other impurity), for preventing from, after the air inlet compressor such as dust, solid impurity of in the air, leading to air compressor cylinder The friction and wear of middle relative movement part.

Additionally, oil water separator (gas-liquid separator) is with further separating contained oil in compressed air and water Point, make the air after compression obtain preliminary purified treatment, for eliminating oil and moisture to motor stator bracket and its iron core Inner flow passage, the pollution of generator, corrosion.

In addition, after the cooled device of compressed air and oil water separator, still containing certain moisture, the number of its content takes Certainly in the size of the temperature, pressure and relative humidity of air.It is desirable that dry air is it is therefore desirable to setting air is done in motor Dry device, i.e. exsiccator.

Further, as shown in figure 5, it is the stator interior air-flow of the permanent magnet direct-driving aerogenerator of the embodiment of the present invention one Acquisition approach, air supply system 12 can be connected with the first pore 2 by main pipe 13 and arm 14, can draw from main pipe 13 and First pore 2 quantity identical arm 14, arm 14 correspondence is connected on the first pore 2.Main pipe 13 is preferably annular, also may be used To be the annular segments of segmentation such that it is able to reduce the on-way resistance that the flowing to air-flow causes.

Additionally, can have two as desiccant thermal source, one is setting exsiccator in above-mentioned air supply system 12, separately One is stator coil.Using stator coil as drying source moreover it is possible to apply under stopped status, need by electrical network through becoming Stream device inversion unit falls power transmission to generator unit stator, makes stator heat production that stator interior structure and internal material are dried.By two In the case that individual thermal source uses cooperatively, moisture is discharged to stator surface by stator itself heat production, so by the moisture of stator interior By the dry air from internal air supply system 12, moisture is taken away from stator surface more afterwards, thus reaching inside and outside stator simultaneously Effect of dehumidifying.

(4) air current flow path

In cabin, air draught delivers to the first pore on stator support 1 after the filtration drying compression of air supply system 12 2, air-flow enters the radial air flow passage 92 of stator core 8, air-flow radially air-flow by the first pore 2 through punching retainingf key 7 Passage 92 proceeds to axial flow passage 91, passes through the second pore 5 on oar side tooth support 6 by axial flow passage 91 afterwards, so Afterwards pass through airway 22 by air-flow introduce oar gusset plate 3 on comb air inlet 21, from comb air inlet 21 spray air-flow just Enter the first above-mentioned spiral comb mechanism 4, form upper and lower two strands of spiral air flows, the air-flow closure ring-type rotation of downward screw Turn gap, stop sleet Dual-Phrase Distribution of Gas olid or the intrusion of rainwater biphase gas and liquid flow, and the air-flow of screw upwards, can clash into and turn Sub- sealing ring 16, the bounce-back air-flow after shock enters the air gap between rotor, collects in stator end cabin side vertically (i.e. Between tower side tooth support 10 and rotor endcap 19), after through between end cap seal ring 20 and tower gusset plate 11 annular gap row Enter in atmospheric environment, these can also be carried out to the end link 17 of winding and magnetic pole 18 in the fraction of motor internal bounce-back It is dried.

(5) sensor, switch controller and switch-control strategy

In order to more reasonably to air supply system, power-cutting switch and net side, power-cutting switch is controlled, can be in wind Setting sensor or detection means in power generator, to detect humidity and the/insulation status within wind-driven generator, thus make The foundation controlling for switch controller execution.

Specifically, the permanent magnet direct-driving aerogenerator system of the present embodiment can also include being arranged on wind-driven generator groove portion Insulate neighbouring and/or core-lamination stack gap location humidity sensor, and humidity sensor is connected with switch controller, this situation Under, switch controller can be used for controlling as follows：

Wind energy turbine set for calm or less than incision wind speed in the state of, to humidity sensor detection humidity value sentence Disconnected, if humidity exceedes predetermined humidity threshold, disconnect power-cutting switch and open net side and fall power-cutting switch, and start source of the gas System；

In the state of wind-driven generator is in and generates electricity by way of merging two or more grid systems, the humidity value of humidity sensor detection is judged, such as Fruit humidity exceedes predetermined humidity threshold, then start air supply system.

In addition, permanent magnet direct-driving aerogenerator system can also include being arranged on the insulation of wind-driven generator groove portion nearby and/ Or the insulation resistance value measurement mechanism of core-lamination stack gap location, insulation resistance value measurement mechanism is connected with switch controller, at this In the case of kind, switch controller can be also used for controlling as follows：

Wind energy turbine set for calm or less than incision wind speed in the state of, to insulation resistance value measurement mechanism detection insulated electro Resistance is judged, if insulating resistance value is less than predetermined insulation resistance standard value, disconnects power-cutting switch and opens net side Power-cutting switch, and start air supply system；

Insulating resistance value in the state of wind-driven generator is in and generates electricity by way of merging two or more grid systems, to the detection of insulation resistance value measurement mechanism Judged, if insulating resistance value is less than predetermined insulation resistance standard value, started air supply system.

It should be noted that above-mentioned humidity sensor and insulation resistance value measurement mechanism can exist can also be only simultaneously One of setting, correspondingly, in the case that humidity sensor and insulation value measurement mechanism are set at the same time, switch controller Control strategy can be the combination of above-mentioned two situations.

Embodiment two

On the basis of embodiment one, the stator of the present embodiment is also equipped with spiral rack shaper in the tower gusset plate of tower side Structure.Specifically, as shown in Figure 6 and Figure 7, Fig. 6 shows for the stator structure of the permanent magnet direct-driving aerogenerator of the embodiment of the present invention two It is intended to, Fig. 7 is the partial structural diagram of Fig. 6.In tower side upwards, stator also includes tower side tooth support 10 and tower gusset plate 11, tower side tooth support 10 is arranged on the tower side axial end of stator core 8, correspondingly, rotor field spider 15 also has end cap Sealing ring 20, forms annular gap between end cap seal ring 20 and tower gusset plate 11.

It is additionally provided with the second spiral comb mechanism 24, the second spiral shell in the side of the close rotary piston sealing ring 16 of oar gusset plate 3 On the whole ringwise, the second spiral comb mechanism 24 has the second spiral comb 241, the second spiral comb for rotation comb mechanism 24 241 reach in the annulus that oar gusset plate 3 and rotary piston sealing ring 16 are formed, for producing screw in annulus Air-flow, thus between end cap seal ring 20 and tower gusset plate 11 formed annular gap in build " forced draft ring-type screen Barrier ", prevents extraneous severe air-flow from entering blower interior.

As described in embodiment one, by the air-flow of the first top spiral comb 41, it will enter motor gas-gap (i.e. The air gap between rotor on the right side of Fig. 1), go motor internal surface is dried, then collect in stator end cabin more vertically Side (i.e. between tower side tooth support 10 and rotor endcap 19), after through the ring-type between end cap seal ring 20 and tower gusset plate 11 between Gap enters in atmospheric environment.The second spiral comb mechanism 24 in the present embodiment acts on this strand of air-flow, when this strand of gas When stream is pooled to stator end cabin side, it will discharge through the second spiral comb mechanism 24, the second spiral comb mechanism 24 rely on this strand of air-flow coming from oar side to produce the air-flow of screw, thus it is close to build pressure in the annular gap of tower side Seal ring border.

Further, enter blower interior it is preferable that in the second spiral comb to be better protected from extraneous severe air-flow Sectional view in, the second spiral comb 241 tilts near the direction of stator support 1, thus for producing screw The air-flow in the direction towards close stator support for the inclination angle, so advantageously in the entrance resisting external air flow.

It is described above two kinds of example structure, air flow path overall in practical application is once illustrated below again, As shown in figure 8, Fig. 8 is the overall air flow path schematic diagram of the permanent magnet direct-driving aerogenerator of the embodiment of the present invention.By setting Air supply system 12 in cabin produces dry gas stream, through the gas channel within stator core 8, reaches on stator coaming plate There is the first spiral comb mechanism 4 of bidirectional screw comb, dry gas stream here is split as two-way, and a road is towards outside motor Portion, forms forced draft looping snail eddy flow barrier, and for blocking extraneous severe air-flow, another road, upwardly toward motor internal, is flowed Through motor gas-gap, carry the moisture (including from the internal moisture overflowing) on motor surface, form humid air, from the tool of motor tower side The the second spiral comb mechanism 24 having one-way spiral comb extrudes.

Embodiment three

Drying control method is worked in coordination with the sealing that the present embodiment is mainly introduced based on embodiment one and embodiment two, and it is mainly Detection based on humidity and/or insulating resistance value and carry out, and the generating state being according to blower fan, reasonably to select to control System strategy.Specifically include：

Wind energy turbine set calm or less than incision wind speed period, if humidity exceedes predetermined humidity threshold or insulated electro Resistance is less than insulation resistance standard value, then disconnect power-cutting switch and open net side and fall power-cutting switch, and start air supply system；

It is in the period generated electricity by way of merging two or more grid systems in wind-driven generator, if humidity exceedes predetermined humidity threshold or insulation resistance Value is less than insulation resistance standard value, then start air supply system.

Example IV

Drying control method, the present embodiment are worked in coordination with the sealing that the present embodiment is mainly introduced based on embodiment one and embodiment two It is again based on the detection of humidity and/or insulating resistance value and carry out, and the generating state being according to blower fan, come reasonably Select control strategy, but be with embodiment three difference, the weather conditions of the present embodiment also introducing are as reference factor. Specifically include：

In the snowy or rainy period, execution is following to be processed：

If wind energy turbine set be calm or less than incision wind speed state, disconnect power-cutting switch and open net side fall power transmission open Close, and start air supply system；

If wind-driven generator is in the state generated electricity by way of merging two or more grid systems, start air supply system,

In the period of no snow and no rain, execution is following to be processed：

Additionally, after the snowy or rainy period, described air supply system can be made to open predetermined amount of time, Ran Houzai The above-mentioned process in no snow and no period of rain of execution.That is, after the sleet period, need wind-driven generator is carried out with drying by force Process, it is to avoid the accumulation of moisture.

In addition, for air supply system, after start-up, can be according to the wind speed of wind energy turbine set and/wind-driven generator Rotating speed, the pressure of air supply system output gas flow described in self-adaptative adjustment；Can also the cooling of wind-driven generator require, adjustment is described The temperature of air supply system output gas flow.

It is described above four embodiments of the present invention, introduce the important of the embodiment of the present invention below more on the whole Technology point, other optional modes and technique effect：

1st, in embodiments of the present invention, air supply system can be arranged in the cabin of wind power generating set, air supply system The dry air providing flows through main pipe multichannel and draws press-in stator support, by the ferrum being fastenedly connected on generator unit stator support The heart, in iron core, the runner of design provides enough forced drafts at generator sealing, sets up " pressure-fired closure pressure Air-flow constitutes annular barrier with spiral comb ".

2nd, the pressure seal between labyrinth (comb) sealing cooperation bidirectional screw comb is combined in helixseal, and is arranged on Wind-driven generator upwind ring-type gap stators side, stator side setting helixseal combination labyrinth (comb at lower wind direction annular gap Tooth) sealing.

3rd, wind energy turbine set calm or less than incision the wind speed period can be by the net side inverter of generating set current transformer Fall power transmission from electrical network to electromotor, now net side inverter is in rectification state, through current transformer DC master row by controlled unidirectional current Give generator unit stator winding to insulate and core-lamination stack gap for the groove portion relying on stator winding heat production that winding is dried.According to Come groove portion insulation and the core-lamination stack gap of dry interior winding by stator winding itself heat production during, need according to when fixed When in son, moisture Concentraton gradient is consistent with thermograde direction, its moisture transmittance process speed is observed：

Moisture flow rate in stator=(the moisture current density caused by moisture Concentraton gradient in stator)+(by temperature in stator The moisture transmission density that difference causes)+(the moisture transmission density that stator interior is caused by gas pressure difference).I.e. wet by three gradients Amount gradient, thermograde and barometric gradient combine decision.

The gas that air gap is dried of " working in coordination with " (inventive point herein, sealing is collaborative to be dried one of original idea) source of the gas realizing active sealing Stream, to coordinate, the humid air of internal for stator winding heat production gasification " displacement " generation entrance air gap is driven vertically, close through tower side Envelope extruder motor flow direction motor external elements.Rely on the internal individually heat production of winding to be dried or rely solely on source of the gas and gas is dried Effect air gap within being dried all not as good as their synergy, this is that (sealing is collaborative to be dried original idea also to collaborative meaning " two " to stream Including：Source of the gas air-flow as described in " 4 " has two strands, and one is used for sealing, and resists outside rainwater, sleet, and another stock is used for drying Motor internal, and it is used for producing inside displacement wet gas current, winding and that outside enters).The meaning three of " working in coordination with " also refers to：Based on dry Dry field-synergy theory requires：Enter dry gas stream direction and rotor motion direction shape (the dry gas stream edge in an angle of air gap The component circumferencial direction is against rotor direction of rotation.So, dry gas stream and rotor permanent magnet magnetic pole anti-corrosion protection coating Between speed of related movement increase, friction effect increase, beneficial to rotor magnetic pole overcoat is dried, ingenious use is dried field coordination Theory calls.)

4th, wind energy turbine set calm or less than incision the wind speed period rely on cabin in source of the gas between annular gap and labyrinth seal Produce enough air-flows, a part overflows motor directly up outside wind direction, a part turns to internal, skims over air gap, after winding to End is accumulated, through extruding between annular gap and labyrinth seal；A parallel in this process surface mass transfer dry run exists Occur, dry air will be realized convective mass transfer on generator unit stator surface and stator winding surface be dried with heat convection, do simultaneously Dry generator magnetic pole overcoat (composite), then carries vapor in the lump and leaves.Rely on is that the artificial pressure manufacturing is close Envelope air-flow goes to play its second function：Go to be dried between the groove portion insulation of winding and core-lamination stack by surface mass transfer form Gap, is dried generator magnetic pole overcoat (composite) simultaneously, and plays the effect of transmission moisture.Parallel in this process , simultaneously occurring, current transformer DC master row is by controlled unidirectional current to giving generator unit stator winding for one internal mass transfer dry run For relying on stator winding heat production that groove portion insulation and the core-lamination stack gap of winding are dried.I.e. " the collaborative dry sequential of sealing The four of the original idea of control ", the internal controlled heat production of stator winding is driven damp, pressure-tight air-flow and is realized doing in surface convective mass transfer Dry, complete the heat and mass drying purpose of motor stator and its porous material.

5th, during blower fan generates electricity by way of merging two or more grid systems (stator winding is in heat production), and no rain no avenges sequential section, can be according to generating The current insulation on-line equipment of machine determines whether to the insulation measurement value of generator windings to put into for pressure-tight gas Source air-flow work.At this moment " sealing " is combined labyrinth and carbon gland：Spiral comb coordinates pressure seal.I.e. " sealing collaborative dry when The five of the original idea of sequence control " (drive damp, pressure-tight air-flow and realize doing in surface convective mass transfer by the internal controlled heat production of stator winding Dry, complete the heat and mass drying purpose of motor stator and its porous material).

6th, during blower fan generates electricity by way of merging two or more grid systems, and no rain no avenges sequential section, can according to the current air of electromotor relatively Humidity on-line equipment measured value determines whether to put into for pressure-tight source of the gas air-flow work.I.e. " sealing collaborative dry when The six of the original idea of sequence control ", the internal controlled heat production of stator winding is driven damp, pressure-tight air-flow and is realized doing in surface convective mass transfer Dry, complete the heat and mass drying purpose of motor stator and its porous material.

7th, during blower fan generates electricity by way of merging two or more grid systems, and rainy or snowy sequential section, use can be automatically engaged according to weather forecast In the work of pressure-tight source of the gas air-flow, go to resist the outer rain of open-type electromotor or snowy day gas sequential section wind and rain " biphase gas and liquid flow " A large amount of intrusions with wind and snow " Dual-Phrase Distribution of Gas olid ".At this moment " sealing " is combined labyrinth and carbon gland：Spiral comb combination pressure seals.I.e. The seven of the original idea of " the collaborative dry sequencing contro of sealing ", the internal controlled heat production of stator winding is driven damp, pressure-tight air-flow and is existed Surface convective mass transfer realizes drying, completes the heat and mass drying purpose of motor stator and its porous material.

8th, after rain or snowy sequential section, no matter whether wind energy turbine set has wind, all puts into for pressure-tight source of the gas gas Stream work.The long short hairs of making time are according to the current insulation insulation measurement value to generator windings for the on-line equipment of electromotor It is compared with insulation resistance acceptance value.I.e. the eight of the original idea of " the collaborative dry sequencing contro of sealing ", when calm, still rely on Controlled unidirectional current is used for relying on stator winding heat production that winding is dried by current transformer DC master row to giving generator unit stator winding Groove portion insulation and core-lamination stack gap；The internal controlled heat production of stator winding drives damp, pressure-tight air-flow on surface to spreading Matter realizes drying, completes the heat and mass drying purpose of motor stator and its porous material.

9th, can also be adjusted for pressure-tight source of the gas according to current wind farm wind velocity or generator speed " self adaptation " Air-flow operating pressure, save source of the gas source power while ensure resist carry rain or snow upwind air stream " close to reach The effect of envelope " motor internal.

10th, sealing forced draft temperature can adjust at source of the gas, during adapting to forced draft work, cold to motor internal But requirement, realizes the purpose of " cool drying ", and the six of the original idea of " the collaborative dry sequencing contro of sealing ", do not affect motor Normal cooling, referring to shown in Figure 10 and Figure 11, wind-driven generator has natural axial cooling duct, arrow represent come the side of stream To, wherein as shown in figure 11, the rear of core that natural cooling duct is located on stator support.

The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by described scope of the claims.

Claims

1. a kind of permanent magnet direct-driving aerogenerator system, including wind-driven generator and current transformer, described current transformer includes rectification Unit, DC master row and inversion unit, described inversion unit is connected with electrical network, in described rectification unit and described wind-power electricity generation It is provided with power-cutting switch, described permanent magnet direct-driving aerogenerator includes stator and rotor on the first transmission line of electricity between machine,

It is characterized in that, also include air supply system, net side power-cutting switch, switch controller and jet flow sealing device, wherein,

Described stator includes stator support, the stator core of periphery wall being arranged on stator support, oar side tooth support and oar side Coaming plate, described oar side tooth support is arranged on the oar side axial end of described stator core, the rotor tool mating with described stator There is rotary piston sealing ring；

At least one first pore is had on the periphery wall of described stator support, described oar side tooth support offers at least One the second pore；

Described stator also includes connecting at least one gas channel of described first pore and described second pore, and described air-flow leads to Road passes through the inside of described stator core；

Described air supply system is connected with described first pore；

Described jet flow sealing device is connected with described second pore, for by the air-flow from described second pore to both direction Drain so as in the annulus that formed of oar gusset plate described in one air flow direction and described rotary piston sealing ring, another strand of air-flow Flow to the air gap between described stator and described rotor；

There is between described DC master row and described wind-driven generator the second transmission line of electricity, the setting of falling power-cutting switch of described net side On described second transmission line of electricity；

Power-cutting switch is connected described switch controller with described air supply system, power-cutting switch and net side, described for controlling Power-cutting switch and described net side fall the unlatching of power-cutting switch and disconnection, and the startup of described air supply system and closing.

2. permanent magnet direct-driving aerogenerator system according to claim 1 is it is characterised in that also include being arranged on described wind The insulation of power generator groove portion nearby and/or core-lamination stack gap location humidity sensor, described humidity sensor and described switch Controller connects,

Described switch controller, is used for：

Wind energy turbine set for calm or less than incision wind speed in the state of, to humidity sensor detection humidity value judge, such as Fruit humidity exceedes predetermined humidity threshold, then disconnect described power-cutting switch and open described net side and fall power-cutting switch, and start Described air supply system；

In the state of wind-driven generator is in and generates electricity by way of merging two or more grid systems, the humidity value of humidity sensor detection is judged, if wet Degree exceedes predetermined humidity threshold, then start described air supply system.

3. permanent magnet direct-driving aerogenerator system according to claim 1 is it is characterised in that also include being arranged on described wind The insulation of power generator groove portion nearby and/or core-lamination stack gap location insulation resistance value measurement mechanism, described insulation values measurement dress Put and be connected with described switch controller,

Described switch controller, is used for：

Wind energy turbine set for calm or less than incision wind speed in the state of, to described insulation resistance value measurement mechanism detection insulated electro Resistance is judged, if described insulating resistance value is less than predetermined insulation resistance standard value, disconnects described power-cutting switch simultaneously Open described net side and fall power-cutting switch, and start described air supply system；

Insulating resistance value in the state of wind-driven generator is in and generates electricity by way of merging two or more grid systems, to the detection of described insulation resistance value measurement mechanism Judged, if described insulating resistance value is less than predetermined insulation resistance standard, started described air supply system.

4. permanent magnet direct-driving aerogenerator system according to claim 1 it is characterised in that

Described jet flow sealing device is the first spiral comb mechanism,

The side of the close described rotor of described oar gusset plate is provided with least one comb air inlet, described comb air inlet Pass through the corresponding connection of airway between described second pore,

Described first spiral comb mechanism is arranged on the side of the close described rotary piston sealing ring of described oar gusset plate, and described first On the whole ringwise, described first spiral comb mechanism is connected with described comb air inlet, described first spiral shell for spiral comb mechanism Rotation comb mechanism has the first spiral comb, and described first spiral comb reaches described oar gusset plate and described rotary piston sealing ring In the annulus being formed, for producing the air-flow of screw in described annulus,

Centered on described comb air inlet, the first spiral comb away from stator support side is described first top spiral comb Tooth, the first spiral comb near stator support side is described first lower part helical comb, described first top spiral comb Tilt to the direction away from stator support, the inclination angle for producing screw is directed away from the air-flow in the direction of stator support, Described first lower part helical comb tilts near the direction of stator support, for producing the inclination angle of screw towards near fixed The air-flow in the direction of submounts.

5. permanent magnet direct-driving aerogenerator system according to claim 4 is it is characterised in that described first top spiral is combed The hand of spiral of tooth and described first lower part helical comb is contrary.

6. permanent magnet direct-driving aerogenerator system according to claim 5 is it is characterised in that described first top spiral is combed The hand of spiral of tooth is identical with the direction of rotation of rotor.

7. permanent magnet direct-driving aerogenerator system according to claim 4 it is characterised in that described first spiral comb also Including the first middle part comb；

Described first middle part comb is arranged on described comb air inlet, and described first middle part comb will be from described comb air inlet The air-flow flowing out is shunted so that a part of air-flow flows into described first top spiral comb, and another part air-flow flows into institute State the first lower part helical comb.

8. permanent magnet direct-driving aerogenerator system according to claim 4 is it is characterised in that described stator also includes tower side Tooth support and tower gusset plate, described tower side tooth support is arranged on the tower side axial end of described stator core, described rotor Also there is end cap seal ring,

The side of the close described rotary piston sealing ring of described oar gusset plate is provided with the second spiral comb mechanism, described second spiral shell On the whole ringwise, described second spiral comb mechanism has the second spiral comb, described second spiral comb for rotation comb mechanism Reach in the annulus that described oar gusset plate and described rotary piston sealing ring are formed, for producing spiral shell in described annulus The air-flow of rotation motion.

9. permanent magnet direct-driving aerogenerator system according to claim 8 it is characterised in that described second spiral comb to Tilt near the direction of stator support, for producing the air-flow at the inclination angle of screw towards the direction near stator support.

10. permanent magnet direct-driving aerogenerator system according to claim 4 it is characterised in that described comb air inlet with Pass through the corresponding connection of airway ringwise on the whole between described second pore, or described comb air inlet and described second Pass through the corresponding connection of air ducts separated from one another between pore.

11. according to the arbitrary described permanent magnet direct-driving aerogenerator system of claim 1 to 10 it is characterised in that described fixed Punching retainingf key is fixed with the periphery wall of submounts, the dovetail groove of described stator core is set on described punching retainingf key, Described gas channel is connected through described punching retainingf key with described first pore.

12. permanent magnet direct-driving aerogenerator systems according to claim 11 are it is characterised in that described gas channel includes Radial air flow passage and axial flow passage, described radial air flow passage passes through described punching retainingf key and described stator core Inside, one end of described radial air flow passage is connected with described first pore, and the other end is connected with described axial flow passage, institute State axial flow passage and pass axially through the inside of described stator core and connect with described second pore.

13. permanent magnet direct-driving aerogenerator systems according to claim 12 are it is characterised in that described first pore, institute State the second pore and described gas channel is multiple and quantity is equal, circumferentially impartial setting, multiple described first pores, Described second pore and the corresponding connection of described gas channel, form a plurality of independent periphery wall from described stator support to institute State the current path of oar side tooth support.

14. permanent magnet direct-driving aerogenerator systems according to claim 1 are it is characterised in that described air supply system includes Produce the gas source generator of air-flow of predetermined pressure and described air-flow is carried out at gas source purification and the source of the gas of dried Reason device.

15. permanent magnet direct-driving aerogenerator systems according to claim 14 are it is characterised in that described gas source generator For air compressor, described air supply processing equipment includes air filter, cooler, oil water separator and exsiccator.

A kind of 16. sealings of permanent magnet direct-driving aerogenerator system work in coordination with drying control method it is characterised in that the method is base Carried out in the arbitrary described permanent magnet direct-driving aerogenerator system of the claims 1 to 15, it includes：

To the insulation of the groove portion of wind-driven generator, nearby and/or the humidity of core-lamination stack gap location detects, or wind-force is sent out The insulating resistance value of the winding of motor is detected；

Or period less than incision wind speed calm in wind energy turbine set, if described humidity exceed predetermined humidity threshold or described absolutely Edge resistance value is less than insulation resistance standard value, then disconnect described power-cutting switch and open described net side and fall power-cutting switch, and open Move described air supply system；

It is in the period generated electricity by way of merging two or more grid systems in described wind-driven generator, if described humidity exceedes predetermined humidity threshold or described Insulating resistance value is less than insulation resistance standard value, then start described air supply system.

A kind of 17. sealings of permanent magnet direct-driving aerogenerator system work in coordination with drying control method it is characterised in that the method is based on The arbitrary described permanent magnet direct-driving aerogenerator system of the claims 1 to 15 is carried out, and it includes：Snowy or have The period of rain, execution is following to be processed：

If wind energy turbine set is calm or less than incision wind speed state, disconnects described power-cutting switch and open described net side and send Electric switch, and start described air supply system；

In the period of no snow and no rain, execution is following to be processed：

Drying control method is worked in coordination with the sealing of 18. permanent magnet direct-driving aerogenerator systems according to claim 17, and it is special Levy and be, after the snowy or rainy period, after making described air supply system open predetermined amount of time, then execute above-mentioned no The process of snow and the no period of rain.

Drying control method is worked in coordination with the sealing of 19. permanent magnet direct-driving aerogenerator systems according to claim 17, and it is special Levy and be, after starting described air supply system, the rotating speed of wind speed according to wind energy turbine set and/wind-driven generator, self-adaptative adjustment The pressure of described air supply system output gas flow.

Drying control method is worked in coordination with the sealing of 20. permanent magnet direct-driving aerogenerator systems according to claim 17, and it is special Levy and be, after starting described air supply system, the cooling according to wind-driven generator requires, and the described air supply system of adjustment exports gas The temperature of stream.