CN204334142U - Permanent magnet direct-driving aerogenerator, system and stator thereof - Google Patents
Permanent magnet direct-driving aerogenerator, system and stator thereof Download PDFInfo
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- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model provides a kind of permanent magnet direct-driving aerogenerator, system and stator thereof, wherein, stator comprises stator support, be arranged on stator core and the oar side tooth support of the periphery wall of stator support, described oar side tooth support is arranged on the oar side axial end of described stator core, the periphery wall of described stator support has at least one first pore, described oar side tooth support offers at least one second pore, described stator also includes at least one gas channel of the first pore described in UNICOM and described second pore, described gas channel is through the inside of described stator core.The utility model embodiment uses " pressure-fired " technology by the rotor inside at high altitude wind power generator, make motor can adaptively dry self, and stop extraneous severe air-flow to enter motor internal, extend the useful life of permanent magnetism magnetic pole, prevent motor internal device " insulation level reduction ", reduce the risk that motor corrodes by severe air-flow, improve insulating reliability.
Description
Technical field
The utility model belongs to technical field of wind power, is specifically related to permanent magnet direct-driving aerogenerator, system and stator thereof.
Background technology
Open type permanent magnet direct-drive external rotor wind driven electric generator in prior art, rely on natural air cooled, opening structure is beneficial to natural draft heat exchange, help magnetic pole use permanent magnetic material prevent temperature rise from exceeding standard after magnetic reduce, but generator is exposed to exceedingly odious environment (being exposed to wind, frost, rain, snow, sand and dust, salt fog etc.) condition usually to be descended.
1, the source of motor internal moisture content and harm thereof in wet environment
(1) source of moisture content
Wet environment compared with normal environment, rain, snow more easily enter motor internal, and the source being summed up moisture content mainly contains following several:
The wind-driven generator of the nacelle exterior of outdoor operation, be directly subject to drenching with rain the dipping after melting with snow-broth, and a small amount of moisture content is rotated by motor and enters motor internal from annular gap; In wet weather after generator quits work, moisture enters generator and then condensation; The generator of long-time stoppage in transit condenses because moisture enters moisture-sensitive; The wind-driven generator worked in adverse circumstances also may suffer the accidents (osculum blocking) such as sleet water soaking to cause moisture content to enter; Moisture content in the insulation pore that preliminary drying or dipping lacquer post-drying thoroughly do not cause is not carried out by technological requirement remaining etc. in generator production process.
(2) the generator insulating reason of easily making moist
This part is mainly quoted paper " analysis of causes that generator insulating easily makes moist " and is described (author: QiYu good fortune QI Yu-fu prints name: heavy motor technology year, volume (phase): 2009 (4)).
Air-cooled type generator insulate and easily makes moist under shut down condition, is mainly manifested in that leakage current significantly increases, insulation resistance significantly reduces.According to the rules, insulation resistance is low to certain numerical value, is do not allow to run, must carries out drying process.
It is running status due to it and structures shape that air-cooled type generator insulating easily makes moist.Because the insulation of generator can only adopt solid dielectric insulation, embed in core slots, can not soak as transformer in insulating oil, can not as fully closed combined electric unit GIS, be sealed in and be full of in the closed metal shell of SF6, the insulation of generator can only expose in atmosphere.In normal course of operation, the heat that generator core, winding produce will lean on the air of flowing to take away.When generator heat production and heat radiation reach balance, generator core, winding temperature remain within certain numerical value scope.When generator normally runs, rely on natural air cooled external rotor permanent magnet directly to drive generator and also rely on the air invaded from nature to serve as coolant.Unshakable in one's determination, winding temperature can be higher than the temperature of coolant air, after generator is stopped transport, unshakable in one's determination, winding temperature reduces gradually, due to the effect that air in space, air gap expands with heat and contract with cold, enters a large amount of air to reach pressure balance in generator.At this moment insulation absorbs the moisture in air and makes moist, if at thunderstorm season, after rain, air humidity is larger, and generator insulating makes moist just even more serious.After generator insulating makes moist, leakage current is tens times of normal value even hundred times, and insulation resistance is 1/tens of normal value.From data analysis, generator insulating makes moist very serious, without drying process, can not run.Generator insulating makes moist seriously, is the test data angle from insulation.In fact, humidified insulation initial stage, just adsorption moisture, insulating inner does not also make moist, and compared with being subject to after water logging with insulation, the moisture of insulating surface or trace, drying is got up also much easier.
The insulation of motor, when air humidity is very large, is made moist and is caused the reduction of insulation resistance to require a very short time, one day even several hours.This sky of will praying for rain must resist rainwater and enters in generator or taken away by humid air in motor in time after rain.Code has explicit stipulation: insulation resistance is defective can not be ensured generator operation accidents happened, just in case have an accident, certainly will cause very large economic loss.Have to pass through dry process qualified after could run.
(3) there is the harm that moisture content causes in generator
For generator, good insulation is the precondition that motor safety runs, no matter the skin of slot liner, layer insulation, phase insulation or binding strap and power outlet in the stator windings, there is a large amount of pores, be easy to absorb the moisture in air, reduce the insulation property of self and insulating heat-conductive is deteriorated, cause insulation breakdown and then damage motor, causing the person, device security accident.Relative humidity height easily makes the solidifying attached water film in surface, humidity higher than more than 95% time, motor internal often condenses water droplet, make metalwork easy-to-rust, lubricating grease becomes damp and rotten, expansion that what insulating material had make moist, feeling like jelly of having is clamminess, and machinery and electric property worsen, and easily insulation breakdown and dielectric surface flashover occur.In addition, under high humidity environment, mould also easily grows, and the secretion energy corroding metal of mould and insulating material, insulation is worsened rapidly, causes short circuit accident.
2, the Macro or mass analysis of prior art
(1) common in prior art drying mode
This part is with reference to paper " the field drying process that stator winding insulation in generator is made moist " (author: Lin Jun, Li Yunhai, strong and vigorous, [middle figure classification number] TM31l [Document code] B[article number] 1004-7913 (2009) 04-0013-02) and in content be described.
After generator unit stator winding makes moist, for the generator that the different type of cooling, different capabilities and damp degree are different, carrying out, the drying process time method that adopts is also different, at present on-the-spot conventional following several drying means.(a) stator iron loss seasoning.In fact this method does not have operability to the generator overhauled in high-rating generator especially running.(b) impressed current seasoning.Electric current is passed into, the heat heating rotor windings utilizing copper loss to produce to rotor coil.By on-the-spot capacity limit, be difficult to adopt interchange heating means, therefore generally adopt direct current heating.Generator three-phase windings need be connected by the method, also according to circumstances branch can be untied and be connected into a loop again.High-rating generator current ratio is comparatively large, generally adds direct current by winding strands.Power supply can adopt the power supply of electric barring or other power supply got by rectification, and the generator of low capacity also can adopt the method for multiple stage DC welding machine parallel operation.(c) external heat source method.In generator wind-tunnel, stator upper and lower part deep bead is opened, at stator winding lower disposed electric hot plate or other infra red heating device.The generator of the method to small volume is more effective.(d) three-phase shortcircuit seasoning.By generator unit stator winding exit three-phase shortcircuit, then make generating set operate in nominal speed range, by regulating exciting current, the heat making stator winding current increase thereupon, utilize generator self electric current to produce, carries out drying to winding.Three-phase shortcircuit drying needs generator itself to possess operating condition.(e) hot water circuit seasoning.The generator of stator bar internal water cooling, the heater in inner cold water case or interim access electric heater can be utilized the cooling water heating in inner cold water case, and water temperature higher than 70 DEG C, should not start inner cold water pump, with the insulation of the dry stator bar of hot water circuit.Stator bar water-cooled generator scene adopts the method more, and the object acted on is the motor of Ground Operation.
For permanent magnet direct-driving aerogenerator in order to the scheme (b) in dry insulation system above method on probation.
(2) other dry technologies
Paper " with hot-air removal moisture drying maintenance after halt turbines "
Author: Chen Hanggeng, Cao Zuqing; Authors' working unit: Southeast China University Nanjing; Parent document: the 4th national thermal power generating technology Annual Conference collection of thesis (first volume).
Meeting title: the 4th national thermal power generating technology Annual Conference, the time of meeting: on November 01st, 2003.
Utilize unsaturated humid air to flow through flow passage component after halt turbines, absorb residual moisture, make machine inner drying, after preventing halt turbines, corrosion occurs.For improving the wettability power of humid air, heated by heater again after first humid air being compressed, and then discharge after passing into steam turbine absorption moisture." water capacity that is vented oneself be down to desired indicator, then to show in machine drying, can corrosion be prevented.
(3) paper " quickly drying method of damaged or destroyed by flood motor "
Author: Shen Zhaohu, periodical name: Chinese countryside water conservancy and hydropower year, volume (phase): 1999 (1).
Need drying by the motor after immersion in water, for shortening drying time, saving dry funds, have developed a kind of far infrared temperature control baker.This baker is simple, efficient, practical, draw materials easily, cost is low.
3, open type cabin outer fan power generator encapsulation scheme technology path is explored
Sealing can be divided into the static seal between geo-stationary faying face and the large class of the movable sealing two between relative motion faying face.Here, there is relative motion at the sealing position of open type cabin outer fan power generator, belongs to rotary seal.Whether the parts doing relative motion according to seal and its contact, and movable sealing can be divided into contact seal and non-contacting seal and without shaft seal.For open type cabin outer fan power generator according to contact seal, at non-rain, the air-flow of relatively dry in the drying time of snow period, just cannot be relied on to carry out long-term directly cooling to motor internal.Non-contacting seal has labyrinth seal and dynamic seal.Labyrinth seal is that the throttle effect limit utilizing fluid in gap is leaked, and leakage rate is comparatively large, is usually used in less demanding occasion.Dynamic seal has centrifugal seal, floating-ring seal, helixseal, pressurized seal, injection sealing, hydraulic seal, magnetic current sealing etc., produce pressure by dynamical element to offset the pressure differential of sealing both sides to overcome leakage, it has very high sealing, but energy consumption is large.This kind of sealing utilizes hydromechanical poised state and works.If operating condition changes, the fluctuation that leakage rate is very large will be caused.
Labyrinth seal also claims labyrinth seal, is mainly used in air seal.The passage that it can make fluid form through many throttle clearance and expansion cavity, produce very large energy loss through repeatedly throttling, fluid pressure greatly declines.Directly driving in external rotor large scale permanent-magnetic wind driven generator and can construct sealing part by " choke pressure drop " this feature.
Pressurized seal utilizes air pressure to block the gap between rotating parts and stationary parts, to ensure sealing.But have the gas source feed of certain pressure, the pressure that source of the gas produces in this sealing place is more higher than the outer natural environmental stress of motor.Pressurized seal does not limit by temperature, speed, is generally used for the place that sealing both sides pressure reduction is little.
Based on the relevant representative paper retrieved above, at present, operate in the thermal power generation unit in electrical network, hydro-generating Unit, nuclear power generating sets to be usually arranged in a fixing factory building.Usually, can not through suffering the intrusion of rain, snow in factory building.Just Hydropower Unit is when standing the flooding of flood, the coolant (water) that above-mentioned generating set adopts is when occurring to reveal, and the convenience of the service conditions maintenance of the generating set of ground handling is better than the land or offshore wind turbine of wind energy turbine set operation all far away.Generator cooling aspect, while the air-cooled facility made full use of in natural environment and superior performance condition, what need to solve and will stand severe tests is the insulation level of the insulation system of generator.Permanent magnet direct-drive external rotor wind driven electric generator is exposed to wind throughout the year, sand, rain, snow, the sun are exposed to the sun or among refrigerated environment after shutting down; too large with the environment gap residing for the turbo generator of ground handling, gas turbine generator, hydraulic generator; especially the repair cost had is too high, and work high above the ground (60-100 rice) crane uses needs expense great number to pay.So even just become impossible in the work easily carried out on the ground to wind-driven generator.On the other hand, the operation in wind turbine generator has also depended on wind weather.Wind turbine drive electrical generators rotor turns, generator unit stator induces electromotive force, just can implement three-phase shortcircuit at stator outlet, relies on short circuit current heat production to carry out dry stator, improves insulation level.Also need basis wind speed size at that time, implement to become oar and indirectly control generator amature rotating speed, and then control short circuit current, tide is dried in controlled winding heat production, and these conditions all depend on weather simultaneously.Moreover the lasting length of wind affects dries damp effect, directly drive outer rotor permanent-magnet wind-driven generator quality large, heat production requirement is very big, after heat production, heat conduction time transmits drying time with the quality of driving the time of tide is all some hourage magnitudes, and the continuation time length of wind, discontinuity all affect dries damp effect.
Inventor finds that in practical operation prior art exists following defect:
(1) permanent magnet direct-drive external rotor wind driven electric generator uses natural wind to remove cooling stator core support and rotor outer wall, wind in the natural environment of simultaneously some invades machine cavity through generator stator rotor gap, flow to the other end vertically by air gap again to assemble, after deposition, light air is extruded from back-end sealing and is entered air.What flow through motor internal space is gas (vapour), liquid, solid multiphase flow (wherein having air, steam, rain, snow, salt fog, sand and dust, floccule etc.).They can cause insulation property to worsen, and cause electrical machine insulation electric property, degraded in mechanical properties, and residue withstand voltage level and life-span reduce, and finally cause the destruction of insulating.
(2) be all terrestrial power generation unit operation more than, in the work high above the ground of 60-100 rice, comprise and realize various function, especially service work is carried out in cabin, usual manpower and materials institute can not and, it is impossible even to become.Wind-driven generator sealing, drying step and safeguard that (maintenance, change) differs greatly with the thermal power generation of ground handling, hydroelectric generator operation difficulty.Some ground use good method for the wind turbine generator run in " the sky " but inconvenience carry out, be even difficult to be suitable for.
(3) separately rely on above-mentioned logical air drying methods to be dry tack free technology, can't resolve stator core internal laminations interlayer make moist after dry demand.
(4) adopt open type structure to be that the air in the weather that accompanies each other or the weather that a snowstorm is raging that can not resist the elements carries the harm that rain or snow invade generator, " insulation level reductions " has paid cost for generator cools.
(5), after shutting down, in generator cavity, in air gap, wet air condensation infiltrates motor, and can cause motor stator, permanent magnetism magnetic pole surface coating makes moist, and can affect their useful life.
Utility model content
The object of the utility model embodiment is to provide a kind of permanent magnet direct-driving aerogenerator, system and stator thereof, can the air-flow of stator support inside be incorporated on the axial end of stator core, thus be convenient to motor can use be arranged at inner air flow source dry self, or resist extraneous severe air-flow (such as rain or snow etc.) to make it not easily to enter motor internal, extend the useful life of permanent magnetism magnetic pole, prevent motor internal device " insulation level reduction ", reduce motor make moist gas cut erosion risk and insulating reliability can be guaranteed.
For achieving the above object, embodiment of the present utility model provides a kind of stator of permanent magnet direct-driving aerogenerator, comprise stator support, be arranged on the stator core of the periphery wall of stator support and oar side tooth support, described oar side tooth support is arranged on the oar side axial end of described stator core
The periphery wall of described stator support has at least one first pore, described oar side tooth support offers at least one second pore,
Described stator also includes at least one gas channel of the first pore described in UNICOM and described second pore, and described gas channel is through the inside of described stator core.
Further, the periphery wall of described stator support is fixed with punching retainingf key, the dovetail groove of described stator core is set on described punching retainingf key, and described gas channel is through described punching retainingf key and described first pore UNICOM.
Further, described gas channel comprises radial air flow passage and axial flow passage, described radial air flow passage passes the inside of described punching retainingf key and described stator core, one end of described radial air flow passage is connected with described first pore, the other end and described axial flow expanding channels, described axial flow passage passes axially through the inside of described stator core and described second pore UNICOM.
Further, described first pore, described second pore and described gas channel is multiple and quantity is equal, circumferentially impartial setting, the corresponding UNICOM of multiple described first pore, described second pore and described gas channel, forms many current paths independently from the periphery wall of described stator support to described oar side tooth support.
Further, described oar side tooth support is provided with the convergent jet pipe of annular, the annular entry UNICOM of described second pore and described convergent jet pipe.
Further, described stator comprises oar gusset plate, the rotor mated with described stator comprises rotary piston sealing ring, and after described stator and rotor combination being installed, the ring exit of described convergent jet pipe faces toward the annulus of described oar gusset plate and the formation of described rotary piston sealing ring.
Further, the section of described convergent jet pipe is sickleshaped, comprise the vertical section of UNICOM successively, tilting section and bending section, described vertical section and described second pore UNICOM, the radial width of described vertical section is consistent and be more than or equal to the radial width of described second pore, described tilting section tilts to stator center direction on the whole, described bending section is on the whole in arc-shaped, its end forms the outlet of described convergent jet pipe, from described tilting section to the end of described bending section, described radial width reduces gradually.
In addition, the stator that embodiment still provides another kind of permanent magnet direct-driving aerogenerator of the present utility model, comprise stator support, be arranged on the stator core of the periphery wall of stator support, oar side tooth support and tower side tooth support, described oar side tooth support is arranged on the oar side axial end of described stator core, described tower side tooth support is arranged on the tower side axial end of described stator core
The periphery wall of described stator support has at least one first pore, described oar side tooth support offers at least one second pore, described tower side tooth support offers at least one the 3rd pore,
Described stator also comprises at least one gas channel by described first pore and described second pore and described 3rd pore UNICOM, and described gas channel is through the inside of described stator core.
Further, the periphery wall of described stator support is fixed with punching retainingf key, the dovetail groove of described stator core is set on described punching retainingf key, and described gas channel is through described punching retainingf key and described first pore UNICOM.
Further, described gas channel comprises radial air flow passage and axial flow passage, described radial air flow passage passes the inside of described punching retainingf key and described stator core, one end of described radial air flow passage is connected with described first pore, the other end and described axial flow expanding channels, described axial flow passage passes axially through the inside of described stator core and described second pore and described 3rd pore UNICOM.
Further, described first pore, described second pore, described 3rd pore and described gas channel is multiple and quantity is equal, circumferentially impartial setting, the corresponding UNICOM of multiple described first pore, described second pore, described 3rd pore and described gas channel, forms many independently from the periphery wall of described stator support to the current path of described oar side tooth support and described tower side tooth support.
Further, described oar side tooth support and described tower side tooth support are respectively arranged with the convergent jet pipe of annular, the annular entry UNICOM of described second pore and described 3rd pore and described convergent jet pipe.
Further, described stator comprises oar gusset plate and tower gusset plate, described rotor comprises rotary piston sealing ring and end cap seal ring, after described stator and rotor combination are installed, the gap that the ring exit being arranged on the convergent jet pipe on the tooth support of described oar side is formed facing to oar gusset plate and rotary piston sealing ring, the annulus that the ring exit being arranged on the convergent jet pipe on the tooth support of described tower side is formed facing to described tower gusset plate and described end cap seal ring.
Further, the section of described convergent jet pipe is sickleshaped, comprise the vertical section of UNICOM successively, tilting section and bending section, the described vertical section being arranged on described convergent jet pipe on described oar side tooth support and described tower side tooth support respectively with described second pore and described 3rd pore UNICOM, the radial width of described vertical section is consistent and be more than or equal to the radial width of described second pore and described 3rd pore, described tilting section tilts to stator center direction on the whole, described bending section is on the whole in arc-shaped, its end forms the outlet of described convergent jet pipe, from described tilting section to the end of described bending section, described radial width reduces gradually.
Of the present utility modelly embodiment still provides a kind of permanent magnet direct-driving aerogenerator, comprise rotor and as above arbitrary described stator.
In addition, the stator that embodiment still provides another permanent magnet direct-driving aerogenerator of the present utility model, comprise stator support, be arranged on the stator core of the periphery wall of stator support and tower side tooth support, described tower side tooth support is arranged on the tower side axial end of described stator core
The periphery wall of described stator support has at least one first pore, described tower side tooth support offers at least one the 3rd pore,
Described stator also includes at least one gas channel of the first pore described in UNICOM and described 3rd pore, and described gas channel is through the inside of described stator core.
Further, the periphery wall of described stator support is fixed with punching retainingf key, the dovetail groove of described stator core is set on described punching retainingf key, and described gas channel is through described punching retainingf key and described first pore UNICOM.
Further, described gas channel comprises radial air flow passage and axial flow passage, described radial air flow passage passes the inside of described punching retainingf key and described stator core, one end of described radial air flow passage is connected with described first pore, the other end and described axial flow expanding channels, described axial flow passage passes axially through the inside of described stator core and described 3rd pore UNICOM.
Further, described first pore, described 3rd pore and described gas channel is multiple and quantity is equal, circumferentially impartial setting, the corresponding UNICOM of multiple described first pore, described 3rd pore and described gas channel, forms many current paths independently from the periphery wall of described stator support to described tower side tooth support.
Of the present utility modelly embodiment still provides another kind of permanent magnet direct-driving aerogenerator, comprise rotor and as above arbitrary described stator.
Further, described stator comprises tower gusset plate, described rotor comprises end cap seal ring, tower side seal parts are provided with between described tower gusset plate and described end cap seal ring, described tower side seal parts are fixed on a side of described tower gusset plate or described end cap seal ring, with the annulus between the mode seal tower gusset plate of movable sealing and described end cap seal ring.
Of the present utility modelly embodiment still provides a kind of permanent magnet direct-driving aerogenerator system, comprise wind-driven generator as above and be arranged on the air supply system of Wind turbines inside, described air supply system is connected with described first pore.
Further, described air supply system comprises the gas source generator of the air-flow producing predetermined pressure and described air-flow is carried out to the air supply processing equipment of gas source purification and dry process.
Further, described gas source generator is air compressor, and described air supply processing equipment comprises air cleaner, cooler, oil water separator and drier.
Further, described air supply system is connected with described first pore with arm by female pipe, and draw the arm identical with described first pore quantity from described mother's pipe, described arm correspondence is connected on described first pore.
The permanent magnet direct-driving aerogenerator of the utility model embodiment, system and stator thereof, can the air-flow of stator interior be incorporated on the axial end of stator core, thus making motor use to be arranged at inner air flow source to carry out, self is dry, cool or resist extraneous severe air-flow (such as rain or snow) makes it not easily to enter motor internal, thus the useful life of permanent magnetism magnetic pole can be extended, prevent motor internal device " insulation level reduction ", reduce risk that motor corrodes by severe air-flow (such as rain or snow) and insulating reliability can be guaranteed.
Accompanying drawing explanation
Fig. 1 is the stator structure schematic diagram of the permanent magnet direct-driving aerogenerator of the utility model embodiment one;
Fig. 2 be in Fig. 1 along A-A to schematic cross-section;
Fig. 3 is the air flow path schematic diagram of the stator core inside of the permanent magnet direct-driving aerogenerator of the utility model embodiment one;
Fig. 4 is the structural representation being arranged on the convergent jet pipe in permanent magnet direct-driving aerogenerator of the utility model embodiment one;
Fig. 5 be the permanent magnet direct-driving aerogenerator of the utility model embodiment one stator in air-flow acquisition approach;
Fig. 6 is the structural representation of the stators and rotators bound fraction of the generator of the utility model embodiment one;
Fig. 7 is the structural representation of the stators and rotators bound fraction of the permanent magnet direct-driving aerogenerator of the utility model embodiment two;
Fig. 8 is the permanent magnet direct-driving aerogenerator overall structure schematic diagram of the utility model embodiment two;
Fig. 9 is the structural representation of the stators and rotators bound fraction of the permanent magnet direct-driving aerogenerator of the utility model embodiment three.
Drawing reference numeral illustrates:
1-stator support; 2-first pore; 3-oar gusset plate; 4-convergent jet pipe; 41-bending section; 42-tilting section; The vertical section of 43-; 5-second pore; 6-oar side tooth support; 7-punching retainingf key; 8-stator core; 9-gas channel; 91-axial passage; 92-radial passage; 10-tower side tooth support; 11-tower gusset plate; 12-air supply system; 13-mother pipe; 14-arm; 15-rotor field spider; 16-rotary piston sealing ring; 17-winding; 18-magnetic pole; 19-rotor endcap; 20-end cap seal ring; 21-the 3rd pore; 22-tower side seal.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
The know-why of the utility model embodiment utilizes the gas channel in permanent magnet direct-driving aerogenerator stator core to be incorporated on the axial end of stator core by inner for unit source of the gas, thus build pressure-fired environment in the inner space utilizing this air-flow to be formed after the stators and rotators combination of blower fan, pressure-fired air-flow is used to resist the invasion of extraneous severe air-flow (gas, liquid, solid multiphase flow wherein has air, steam, rain, snow, salt fog, sand and dust, floccule etc.).The said pressure-fired of the utility model embodiment is that the pressure of internal gas flow or environment is greater than external environment, degree can make extraneous air-flow cannot enter motor internal.Wherein, above-mentioned severe air-flow mainly refers to rainwater biphase gas and liquid flow or wind and snow Dual-Phrase Distribution of Gas olid, also there is gas, liquid, solid multiphase flow under certain extreme case, such as, have air, steam, rain, snow, salt fog, sand and dust, floccule etc.These severe air-flows mainly come across the atrocious weather such as rain or snow situation and descend, therefore, the device of the utility model embodiment mainly designs to resist these severe air-flows, and under normal dry weather, the device of the utility model embodiment can not be used, and allow dry gas stream enter in wind-driven generator, for carrying out drying, cooling to blower fan.
Embodiment one
As shown in Figure 1, it is the stator structure schematic diagram of the permanent magnet direct-driving aerogenerator of the utility model embodiment one.Top in Fig. 1 can be defined as oar side for convenience of description (in the process of blower fan work, oar side is weather side faced by meeting generally), below is defined as tower side (in the process of blower fan work, tower side is downwind side faced by meeting generally), horizontal direction is defined as radial direction (radial direction centered by whole blower fan), and vertical direction is defined as axially (direction along the rotating shaft of wind-driven generator).In addition, the periphery wall of stator support refers to and to connect or adjacent sidewall with the punching retainingf key of stator core or fixed stator iron core, i.e. the outermost part of stator support.
The stator of the permanent magnet direct-driving aerogenerator of the present embodiment comprises stator support 1, is arranged on the stator core 8 of stator support 1 periphery wall and oar side tooth support 6, and oar side tooth support 6 is arranged on the oar side axial end of stator core 8.Stator support is cylindric, therefore can have at least one first pore 2 on the periphery wall of stator support 1, oar side tooth support 6 can offer at least one second pore 5.Stator can also include at least one gas channel 9 of UNICOM first pore 2 and the second pore 5, and gas channel 9 can through the inside of stator core 8.
Wherein, the first pore 2 and the second pore 5 can be circle also can be triangle, ellipse.In addition, pore also can be the gas port etc. of other shape, in a word, as long as can conducting air-flow.Preferably, the first pore 2 and the second pore 5 are circular pore, and circular pore can reduce the flowing on-way resistance to air-flow.
By this stator structure, the air-flow of stator interior can be incorporated on the end face of the oar side tooth support 6 of stator core, thus in the oar side of wind-driven generator, wind power generation function utilizes the air flow source being arranged at inside to carry out self drying, cool or resist extraneous severe air-flow (such as rain or snow etc.) to make it not easily to enter motor internal, thus the useful life of permanent magnetism magnetic pole can be extended, prevent motor internal device " insulation level reduction ", reduce risk that motor corrodes by severe air-flow (such as rain or snow etc.) and insulating reliability can be guaranteed.
Further, on the basis of said stator structure, the convergent jet pipe 4 of annular can be set on oar side tooth support 6, thus control the air-flow of drawing from stator interior, be used for realizing the drying of blower fan or be used for resisting external air flow.
Describe in detail to the Alternate embodiments in the gas channel involved by said stator structure, convergent jet pipe, the air supply system being arranged on Wind turbines inside and air current flow path below.
(1) gas channel of stator core inside
The gas channel 9 of stator core 8 inside is incorporated into for the air-flow of the source of the gas 12 by stator interior at least one second pore 5 place that oar side tooth support 6 is offered.Particularly, as shown in Figure 2, it is the airflow channel structure schematic diagram intercepted along A-A cross section in Fig. 1, the periphery wall of stator support 1 is fixed with punching retainingf key 7, (stator core is formed by many lobes block combiner unshakable in one's determination in stator core 8, each module unshakable in one's determination is made up of core lamination) 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 can be positioned on the periphery wall of the stator support 1 contacted with punching retainingf key 7, and gas channel 9 can through the pore of punching retainingf key 7 and the first pore 2 UNICOM.
As shown in Figure 6, gas channel 9 can comprise radial air flow passage 92 and axial flow passage 91, radial air flow passage 92 can pass the inside of punching retainingf key 7 and stator core 8, 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 inside and second pore 5 UNICOM of stator core 8.Wherein, radial air flow passage 92 can directly be connected with axial flow passage 91, also can connect, in a word, as long as radial air flow passage 92 can be connected with axial flow passage 91 after bending arbitrarily again.
In addition, the first pore 2, second pore 5 and gas channel 9 can be multiple and quantity is equal, circumferentially impartial setting.Wherein, multiple first pore 2, second pore 5 and the corresponding UNICOM of gas channel 9, form many current paths independently from the inwall of stator support 1 to oar side tooth support 6.Preferably, in the below of oar side, the inside tooth support 6 of stator core 8, radial air flow passage 92 turns to 90 degree, stator core 8 inside and enters axial flow passage 91, and axial flow passage 91 is parallel to motor stator axially.As shown in Figure 3, it is the air flow path schematic diagram of the stator core inside of the permanent magnet direct-driving aerogenerator of the utility model embodiment one, wherein, radial air flow passage and axial flow passage one_to_one corresponding, illustrate only axial flow passage in figure, the utility model embodiment has several gas channels, preferably, as shown in Figure 3, be provided with 48 gas channels altogether, their length (L
1, L
2l
48)/internal diameter (d
1, d
2d
48)/absolute roughness (ε
1, ε
2ε
48) preferably identical, circumferential interval is also consistent.
(2) convergent jet pipe
The outlet of convergent jet pipe 4 can just to the gap between stator and rotor, ejection after air-flow can accelerate by convergent jet pipe 4, the gap location between stator and rotor forms pressure-fired air-flow and goes the intrusion initiatively resisting sleety weather period rain or snow " biphase gas and liquid flow " or " Dual-Phrase Distribution of Gas olid ".Particularly, as shown in Figure 4, it is the structural representation of the convergent jet pipe of the permanent magnet direct-driving aerogenerator of the utility model embodiment one; Oar side tooth support 6 can be provided with the convergent jet pipe 4 (namely arranging along the circumferencial direction of stator on the whole) of annular, second pore 5 and the annular entry UNICOM of convergent jet pipe 4, can cause the gas in the gas channel 9 of stator core 8 inside in convergent jet pipe 4.
In addition, at the weather side of wind-driven generator (also referred to as oar side, the i.e. upside of Fig. 6), stator can comprise oar gusset plate 3, rotor can comprise rotary piston sealing ring 16, after stator and rotor combination being installed, the ring exit of convergent jet pipe 4 can face the annulus of oar gusset plate 3 and rotary piston sealing ring 16 formation.For the annulus formed between shutoff oar gusset plate 3 and rotary piston sealing ring 16.Alternatively, because oar gusset plate 3 is circular, therefore convergent jet pipe 4 can make the circular jet pipe of integral type, closely latch closure is at least one second pore 5 place of oar gusset plate 3, make convergent jet pipe 4 and the second pore 5 seamless link, and then make each the second pore 5 effluent air fully conflux and make the pressure homogenization of air-flow, impartial pressure is formed in the exit of convergent jet pipe 4.
In the process of design convergent jet pipe, use the Bernoulli equation (energy equation) that in fluid mechanics, real fluid always flows, analyze upwind air stream to carry rainwater (or snow) and clash into after wind-driven generator is obstructed, when passing through annular gap between stator oar gusset plate 3 and rotary piston sealing ring 16 (coaming plate), the change of the pressure that rainwater biphase gas and liquid flow or wind and snow Dual-Phrase Distribution of Gas olid (being called for short outside severe air-flow) produce before and after generator upwind annular gap and flow velocity, thus obtain outside severe air-flow and enter the pressure behind annulus and flow velocity.Then, utilize hydromechanical poised state and calculate pressurized seal fluidic herein---the pressure of annular convergent nozzle exit air-flow and flow velocity.
In general, pressure and the flow velocity of the exit flow of annular convergent jet pipe 4 only need the pressure and the flow velocity that enter annulus a little more than the severe air-flow in above-mentioned outside.Comparatively preferably, be the pressure of exit flow of convergent jet pipe 4 of annular and the pressure of flow velocity higher than the severe air-flow in outside and about the 3%-5% of flow velocity.After the pressure of exit flow of convergent jet pipe 4 determining annular and flow velocity, because the area of the outlet of the convergent jet pipe 4 of annular is certain, therefore, can in the hope of the air flow rate needed for the outlet of convergent jet pipe 4, according to the principle of continuity of fluid flowing, exit flow flow for supplying the air compressor of source of the gas should be equal with the air flow rate needed for the outlet of convergent jet pipe 4, thus determine the exit flow flow of air compressor.
In addition, according to pressure balanced principle, pressure for supplying the exit flow of the air compressor of source of the gas should be added from source of the gas identical to the drop of pressure sum that nozzle exit links is total with the pressure needed for the exit flow of the convergent jet pipe 4 of annular, wherein, drop of pressure comprises on-way resistance and local resistance.As described above, in order to extraneous severe air-flow can be resisted, the pressure entering annulus a little more than the severe air-flow in above-mentioned outside is needed in the outlet pressure of convergent jet pipe 4, after the outlet pressure determining convergent jet pipe 4, add after from source of the gas to the total drop of pressure (this can be obtained by theory calculate or measurement according to the structure of air stream transportation passage and convergent jet pipe) of nozzle exit links, just can determine the pressure of the exit flow of air compressor.
As can be seen here, calculated and actual measurement by above-mentioned theory, pressure and the flow of the exit flow of air compressor can be determined.
Further, the cross section of convergent jet pipe 4 can be sickleshaped, the vertical section 43 of UNICOM successively, tilting section 42 and bending section 41 can be comprised, vertical section 43 and the second pore 5 UNICOM, the radial width of vertical section 43 is consistent and be more than or equal to the radial width of the second pore 5, and tilting section 42 tilts to stator center direction on the whole, bending section 41 is on the whole in arc-shaped, its end forms the outlet of convergent jet pipe 4, and from tilting section 42 to the end of bending section 41, radial width reduces gradually.The pressure energy of air-flow can be converted into the kinetic energy of air-flow by airflow passes convergent jet pipe 4.
The enough pressure that convergent jet pipe 4 relies on source of the gas (such as air compressor) to provide produces high velocity air, and exit velocity, flow are controlled, to adapt to the change of oar crosswind to air velocity.That is: the pressure of pressurized seal can adjust as required automatically, realizes " self adaptation " and regulates, thus reduce the wasted work as the air compressor of source of the gas, energy savings.
In the present embodiment, by the air-flow of inner source of the gas is incorporated in convergent jet pipe, and then spray at the place of portalling after air-flow can being accelerated by convergent jet pipe, because convergent jet pipe portals just to the annular gap between stator and rotor, therefore pressure-fired barrier is formed between motor internal and external environment, initiatively can resist the intrusion of sleety weather period " biphase gas and liquid flow " or " Dual-Phrase Distribution of Gas olid ", by accumulating a large amount of dry air in motor and being extruded by pressure-fired, thus eliminate the moist air stream in the motor external world, make winding surface, permanent magnetism magnetic pole surfacecti proteon coating reaches dry requirement, reduce the risk that motor corrodes by the moisture that rainwater or snow melt produce, improve insulating reliability.
(3) air supply system of Wind turbines inside
Source of the gas in the air supply system 12 (particularly, air supply system 12 can be arranged between stator support or in cabin space) of Wind turbines inside can take from the pressure generator in cabin.Air supply system 12 can resist the elements " biphase gas and liquid flow " and the intrusion of wind and snow " Dual-Phrase Distribution of Gas olid " in rain, snow weather period; Air supply system 12, needing the time period work of dry motor internal, makes the energy consumption decreasing source of the gas while abundant dry generator stator insulator and rotor magnetic pole overcoat.The gas channel 9 arranged in the stator is connected with air supply system 12 by the first pore 2, is caused in gas channel 9 by the source of the gas of Wind turbines inside.Air supply system 12 can comprise the gas source generator producing predetermined pressure air-flow and the air supply processing equipment that can purify air-flow and drying processes.
Gas source generator can be air compressor, air compressor (or air compressor) is pressure generator, it improves the pressure of air or the machine of conveying air, is also a kind of conversion equipment changes mechanical energy that prime mover supplies being become air pressure energy.In the air compressor course of work, the air be in compresser cylinder is compressed rapidly, and gas is an exothermic process by the process compressed rapidly, the temperature of compresser cylinder must be caused to raise, therefore, generally need cool.Can 140-170 DEG C be reached in the air compressor afterbody exhaust temperature of multi-stage compression; under such high temperatures; certain gaseous state oil and steam is often mixed with in compressed air; need to arrange cooler cooled compressed air; with oil content contained in initial isolation compressed air and moisture, prevent oil content and moisture from entering stator core of wind driven generator runner with compressed air.Therefore, air supply processing equipment can also comprise air cleaner, cooler, oil water separator and drier.Wherein, air cleaner is used as to filter the gas before entering air compressor cylinder (namely filtering dust contained in air in cabin and other impurity), after entering air compressor for preventing the dust in air, solid impurity etc., cause the friction and wear of relative movement part in air compressor cylinder.
In addition, oil water separator (gas-liquid separator) is used as to be separated oil content contained in compressed air and moisture further, the air after compression is made to obtain preliminary purified treatment, for eliminating oil content and moisture to motor stator bracket and inner flow passage unshakable in one's determination thereof, the pollution of generator, corrosion.
In addition, compressed air after cooler and oil water separator, still containing certain moisture, its content number depend on the size of the temperature of air, pressure and relative humidity.It is desirable that dry air in motor, therefore need to arrange air dry-set, i.e. drier.
Further, as shown in Figure 5, its be the permanent magnet direct-driving aerogenerator of the utility model embodiment one stator in air-flow acquisition approach, air supply system 12 can be connected with the first pore 2 with arm 14 by female pipe 13, can draw the arm 14 identical with the first pore 2 quantity from female pipe 13, arm 14 correspondence is connected on the first pore 2.Female pipe 13 is preferably annular, also can be the annular segments of segmentation, thus can reduce the on-way resistance that causes the flowing of air-flow.
(4) air current flow path
As shown in Figure 6, it is the structural representation of the stators and rotators bound fraction of the generator of the utility model embodiment one.Small arrow shown in figure represents the circulation path of air-flow.Particularly, in cabin, air draught delivers to the first pore 2 on stator support 1 after the filtration drying compression of air supply system 12, air-flow is entered the radial air flow passage 92 of stator core 8 through punching retainingf key 7 by the first pore 2, air-flow radially gas channel 92 proceeds to axial flow passage 91, oar side tooth support 6 is passed afterwards by axial flow passage 91, enter in convergent jet pipe 4, sprayed by convergent jet pipe 4 exit after convergent jet pipe 4 accelerates, blow to the annular gap between oar gusset plate 3 and rotary piston sealing ring 16, thus remove shutoff ring-type rotary gap, stop the intrusion of sleet Dual-Phrase Distribution of Gas olid or rainwater biphase gas and liquid flow.
Specifically, in the course of work of blower fan, oar side is generally just to upwind, upwind incoming flow clashes into generator unit stator support and can rebound, sputter, back reflection, accumulation is clashed into again with rotary piston sealing ring, cause the restorative rising of stream pressure (when comparing incoming flow), these air-flows will be invaded in the ring-type air gap between oar gusset plate 3 and rotary piston sealing ring 16.The air-flow that the convergent jet pipe 4 of the utility model embodiment sprays just is being used to the invasion of shutoff said flow.The air-flow that convergent jet pipe 4 sprays is after the invasion air-flow in the shutoff external world, a part can spray from the ring-type air gap between oar gusset plate 3 and rotary piston sealing ring 16 that (this looks the size of the pressure of air-flow, also can not spray, as long as can plugging action be played), another part or all air-flow can clash into rotary piston sealing ring 16, bounce-back air-flow after shock enters the air gap between rotor, collect in stator end cabin side (namely between tower side tooth support 10 and rotor endcap 19) vertically, enter in atmospheric environment finally by the annular gap between end cap seal ring 20 and tower gusset plate 11, these can also carry out drying to winding 17 and magnetic pole 18 at the fraction of motor internal bounce-back.Be described above the topology example of the stator of the permanent magnet direct-driving aerogenerator of the present embodiment.On this basis, additionally provide a kind of permanent magnet direct-driving aerogenerator at the present embodiment one, it stator comprising rotor and provide as the present embodiment.In addition, the present embodiment one additionally provides a kind of permanent magnet direct-driving aerogenerator system, and it comprises as above-mentioned wind-driven generator and the air supply system 12 being arranged on Wind turbines inside, and air supply system 12 can be connected with the first pore 2.Wherein, as optional execution mode, air supply system 12 and the parts be associated with air supply system 12 are also described above, do not repeat them here.
Embodiment two
The stator that the present embodiment relates to, the concrete structure of permanent magnet direct-driving aerogenerator are as shown in Figure 7 and Figure 8, Fig. 7 is the structural representation of the stators and rotators bound fraction of the permanent magnet direct-driving aerogenerator of the utility model embodiment two, and Fig. 8 is the permanent magnet direct-driving aerogenerator overall structure schematic diagram of the utility model embodiment two.Right in figure can be defined as oar side for convenience of description, left is defined as tower side, vertical direction is defined as radial direction (radial direction centered by whole blower fan), and horizontal direction is defined as axially (direction along the rotating shaft of wind-driven generator).Small arrow shown in figure represents the circulation path of air-flow.To stress below and embodiment one difference, the structure of NM part can refer to the description of embodiment one.
The stator of the present embodiment comprises stator support 1, is arranged on the stator core 8 of stator support 1 periphery wall, oar side tooth support 6 and tower side tooth support 10, oar side tooth support 6 is arranged on the oar side axial end of stator core 8, and tower side tooth support 10 is arranged on the tower side axial end of stator core 8.The periphery wall of stator support 1 has at least one first pore 2, oar side tooth support 6 offers at least one second pore 5, tower side tooth support 10 offers at least one the 3rd pore 21.Stator also comprises at least one gas channel 9 by the first pore 2 and the second pore 5 and the 3rd pore 21 UNICOM, and gas channel 9 is through the inside of stator core.
Wherein, the 3rd pore 21 and the first pore 2 and the second pore 5 similar, can be circle also can be triangle, ellipse.In addition, the 3rd pore 21 pore also can be the gas port etc. of other shape, and in a word, as long as can conducting air-flow, preferably, the 3rd pore 21 be circular pore, and circular pore can reduce the on-way resistance to air current flow.
By this stator structure, the air-flow of stator interior can be incorporated on the oar side tooth support 6 of stator core and the end face of tower side tooth support 10, thus in the oar side of wind-driven generator and tower side, wind-driven generator can utilize the air flow source being arranged at inside to carry out self drying, cool or resist extraneous severe air-flow to make it not easily to enter motor internal, thus the useful life of permanent magnetism magnetic pole can be extended, prevent motor internal device " insulation level reduction ", reduce risk that motor corrodes by severe air-flow (such as rain or snow etc.) and insulating reliability can be guaranteed.
Further, on the basis of said stator structure, the convergent jet pipe 4 of annular can be set on oar side tooth support 6 and tower side tooth support 10, thus control the air-flow of drawing from stator interior, be used for realizing the drying of blower fan, cool or be used for resisting extraneous severe air-flow.
Describe in detail to the gas channel in said stator structure, convergent jet pipe and the Alternate embodiments in air current flow path that is arranged in the air supply system of Wind turbines inside and blower fan below.
(1) gas channel of stator core inside
The gas channel 9 of stator core 8 inside is for being incorporated at least one the 3rd pore 21 place that at least one second pore 5 and tower side tooth support 10 that oar side tooth support 6 is offered are offered by the source of the gas of stator interior.Equally can with reference to Fig. 2, the periphery wall of stator support 1 is fixed with punching retainingf key 7, and stator core 8 has dovetail groove, and 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 can be positioned on the periphery wall of the stator support 1 contacted with punching retainingf key 7, and punching retainingf key 7 can be provided with pore, and gas channel 9 can through the pore of punching retainingf key 7 and the first pore 2 UNICOM.
As shown in Figure 7, the same with embodiment one, gas channel 9 can comprise radial air flow passage 92 and axial flow passage 91, radial air flow passage 92 can pass the inside of punching retainingf key 7 and stator core 8, 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, is with embodiment one difference, and axial flow passage 91 can pass axially through the inside of stator core 8 and the second pore 5 and the 3rd pore 21 UNICOM.
In addition, first pore 2, second pore 5, the 3rd pore 21 and gas channel 9 can be multiple and quantity is equal, circumferentially impartial setting, wherein, multiple first pore 2, second pore 5, the 3rd pore 21 and the corresponding UNICOM of gas channel 9, form many independently from the inwall of stator support 1 to the current path 9 of oar side tooth support 6 and tower side tooth support 10.
(2) convergent jet pipe
The present embodiment also can be provided with the convergent jet pipe 4 identical with embodiment one structure, and only, the convergent jet pipe 4 of embodiment one is arranged at the side of motor, and in the present embodiment, convergent jet pipe 4 is arranged at the both sides of motor.Particularly, in the present embodiment, oar side tooth support 6 and tower side tooth support 10 are respectively arranged with the convergent jet pipe 4 of annular, second pore 5 and the 3rd pore 21 respectively with the annular entry UNICOM of corresponding side convergent jet pipe, namely the second pore 5 on oar side tooth support 6 and the entrance UNICOM of oar side convergent jet pipe 4, the 3rd pore 21 on tower side tooth support 10 and the annular entry UNICOM of tower side convergent jet pipe 4, thus the gas in the gas channel 9 of stator core 8 inside can be caused in convergent jet pipe 4.
As shown in Figure 7, (also oar side can be called at the weather side of motor, the i.e. right side of Fig. 7), stator can comprise oar gusset plate 3, rotor can comprise rotary piston sealing ring 16, after stator and rotor combination being installed, the outlet being arranged at the convergent jet pipe 4 on oar side tooth support 6 can face the gap of oar gusset plate 3 and rotary piston sealing ring 16 formation.For the annulus formed between shutoff oar gusset plate 3 and rotary piston sealing ring 16.Wherein, oar gusset plate 3 and rotary piston sealing ring 16 are circular.Accordingly, (also tower side can be called at the downwind side of motor, the i.e. left side of Fig. 7), stator can also comprise tower gusset plate 11, rotor can comprise rotary piston sealing ring 16 and end cap seal ring 20, after stator and rotor combination being installed, the gap that the outlet being arranged on the convergent jet pipe 4 on tower side tooth support 10 is formed facing to tower gusset plate 11 and end cap seal ring 20, for the annulus formed between shutoff tower gusset plate 11 and end cap seal ring 20.Alternatively, because oar gusset plate 3 and tower side tooth support 10 are circular, therefore convergent jet pipe 4 can make the circular jet pipe of integral type, closely at least one second pore 5 on oar gusset plate 3 and tower side tooth support 10 of latch closure and the 3rd pore 21 place, make convergent jet pipe 4 and the second pore 5 seamless link, and then make each the second pore 5 effluent air fully conflux and make the pressure homogenization of air-flow, impartial pressure is formed in the exit of convergent jet pipe 4.
The same with embodiment one, as shown in Figure 4, the radial section of convergent jet pipe 4 can be sickleshaped, can comprise the vertical section 43 of UNICOM successively, tilting section 42 and bending section 41.Wherein, the vertical section 43 being arranged on the convergent jet pipe 4 on oar side tooth support 6 and tower side tooth support 10 respectively with the second pore 5 and the 3rd pore 21 UNICOM, the i.e. vertical section 43 of the convergent jet pipe 4 of oar side and the second pore 5 UNICOM, the vertical section 43 of the convergent jet pipe 4 of tower side and the 3rd pore 21 UNICOM.The radial width of vertical section 43 is consistent and be more than or equal to the radial width of the second pore 5 and the 3rd pore 21.Tilting section 42 tilts to stator center direction on the whole, and bending section 41 is on the whole in arc-shaped, and its end forms the outlet of convergent jet pipe, and from tilting section 42 to the end of bending section 41, radial width reduces gradually.
(3) air supply system of Wind turbines inside
The structure of air supply system 12 and associated components identical with embodiment one.
(4) air current flow path
As shown in Figure 7 and Figure 8, small arrow shown in figure represents the circulation path of air-flow, in cabin, air draught delivers to the first pore 2 on stator support 1 after the filtration drying compression of air supply system 12, air-flow is entered the radial air flow passage 92 of stator core 8 through punching retainingf key 7 by the first pore 2, air-flow radially gas channel 92 proceeds to axial flow passage 91, oar side tooth support 6 and tower side tooth support 10 is passed afterwards by axial flow passage 91, enter in the convergent jet pipe 4 of both sides, sprayed by convergent jet pipe 4 exit after convergent jet pipe 4 accelerates, blow to the annular gap between oar gusset plate 3 and rotary piston sealing ring 16 and the annular slot between tower gusset plate 11 and end cap seal ring 20 respectively, thus remove the annular gap between shutoff stators and rotators from the both sides of wind-driven generator, stop the intrusion of sleet Dual-Phrase Distribution of Gas olid or rainwater biphase gas and liquid flow.
The air flow path that above-described embodiment one is formed is used to shutoff from the severe air-flow in the external world (air-flow from oar side is invaded) that the ring-type air gap between oar gusset plate 3 and rotary piston sealing ring 16 is invaded, and the air flow path that the structure of the present embodiment is formed can also shutoff from the severe air-flow in the external world (air-flow from tower side is invaded) that the annular slot between lid sealing ring 20 and tower gusset plate 11 is invaded.That is, the convergent jet pipe 4 being all provided with annular in oar side and tower side of the utility model embodiment, thus can in both sides to external world severe air-flow carry out shutoff.
Generally, in the course of work of blower fan, oar side is generally just to upwind, stronger in the external air flow of the weather side of blower fan, upwind incoming flow clashes into generator unit stator support and can rebound, sputter, clash into back reflection, accumulation with rotary piston sealing ring again, cause the restorative rising of stream pressure (when comparing incoming flow), these air-flows will be invaded in the ring-type air gap between oar gusset plate 3 and rotary piston sealing ring 16.
The air-flow that convergent jet pipe 4 sprays the shutoff external world from oar side invasion air-flow after, a part can spray from the ring-type air gap between oar gusset plate 3 and rotary piston sealing ring 16 that (this looks the size of the pressure of air-flow, also can not spray, as long as can plugging action be played), another part or all air-flow can clash into rotary piston sealing ring 16, bounce-back air-flow after shock enters the air gap between rotor, enter in atmospheric environment finally by the annular gap between end cap seal ring 20 and tower gusset plate 11, this part can also carry out drying to dry winding 17 and magnetic pole 18 at the air-flow of motor internal bounce-back.
In this case, because the external air flow of tower side is weak relative to the external air flow of oar side, therefore, the air-flow that the convergent jet pipe 4 being arranged on tower side sprays can directly spray from the annular slot between tower gusset plate 11 and end cap seal ring 20.
On the other hand, in view of the circumstance complication of wind field and wind direction also may be changeable, and, blower fan when being in stopped status, oar side and tower side faced by wind direction also can change.In a lot of situation, the external air flow that also there will be the invasion of tower side is stronger.The convergent jet pipe 4 severe air-flow being to external world arranged on tower side is just needed to carry out shutoff in this case.
In this case, the external air flow of tower side is comparatively strong, and the external air flow of oar side is more weak.The air-flow that convergent jet pipe 4 sprays the shutoff external world from tower side invasion air-flow after, a part understands ejection from the ring-type air gap between tower gusset plate 11 and end cap seal ring 20, and (this looks the size of the pressure of air-flow, also can not spray, as long as can plugging action be played), another part or all air-flow can clash into end cap seal ring 20, bounce-back air-flow after shock enters the air gap between rotor, enter in atmospheric environment finally by the ring-type air gap between oar gusset plate 3 and rotary piston sealing ring 16, these can carry out drying to winding 17 and magnetic pole 18 equally at the fraction of motor internal bounce-back.
In the present embodiment, owing to being also provided with convergent jet pipe 4 in tower side, therefore, compare embodiment one, all can carry out shutoff to the external air flow from oar side and tower side, thus ensure that blower interior is not subject to the invasion of external air flow better.
In addition, additionally provide a kind of permanent magnet direct-driving aerogenerator at the present embodiment one, the stator that can comprise rotor and provide as the present embodiment, concrete structure as shown in Figure 8.
In addition, the present embodiment one additionally provides a kind of permanent magnet direct-driving aerogenerator system, and can comprise as above-mentioned wind-driven generator and the air supply system 12 being arranged on Wind turbines inside, air supply system 12 can be connected with the first pore 2.Wherein, as optional execution mode, air supply system 12 and the parts be associated with air supply system 12 are also described above, do not repeat them here.
Embodiment three
The stator that the present embodiment relates to, the concrete structure of permanent magnet direct-driving aerogenerator, as shown in Figure 9, it is the structural representation of the stators and rotators bound fraction of the permanent magnet direct-driving aerogenerator of the utility model embodiment three, right in figure can be defined as oar side for convenience of description (in the process of blower fan work, oar side is weather side faced by meeting generally), left is defined as tower side (in the process of blower fan work, oar side is downwind side faced by meeting generally), vertical direction is defined as radial direction (radial direction centered by whole blower fan), horizontal direction is defined as axially (direction along the rotating shaft of wind-driven generator).Small arrow shown in figure represents the circulation path of air-flow.To stress the difference with embodiment one and embodiment two below, the structure of NM part can refer to the description of embodiment one.
The stator of the permanent magnet direct-driving aerogenerator of the present embodiment comprises stator support 1, is arranged on the stator core 8 of stator support 1 periphery wall and tower side tooth support 10, and tower side tooth support 10 is arranged on the tower side axial end of stator core 8.The periphery wall of stator support 1 can have at least one first pore 2, tower side tooth support 10 offers at least one the 3rd pore 21.Stator can also include at least one gas channel 9 of UNICOM first pore 2 and the 3rd pore 21, and gas channel 9 can through the inside of stator core 8.
By this stator structure, air-flow in the middle part of stator can be incorporated on the end face of tower side tooth support 10 of stator core, thus in the tower side of wind-driven generator, wind power generation function utilizes the air flow source being arranged at inside to carry out self drying or resists extraneous severe air-flow and makes it not easily to enter motor internal, thus the useful life of permanent magnetism magnetic pole can be extended, prevent motor internal device " insulation level reduction ", reduce risk that motor corrodes by severe air-flow (such as rain or snow etc.) and insulating reliability can be guaranteed.
In addition, be with the difference of embodiment one and embodiment two, the present embodiment does not arrange convergent jet pipe on stator.
In addition, the present embodiment additionally provides a kind of permanent magnet direct-driving aerogenerator, the stator that can comprise rotor and provide as the present embodiment.Wherein, stator can comprise tower gusset plate 11, rotor can comprise end cap seal ring 20, tower side seal 22 can be provided with between tower gusset plate 11 and end cap seal ring 20, tower side seal 22 can be fixed on a side of tower gusset plate 11 or end cap seal ring 20, with the gap between the mode seal tower gusset plate 11 of movable sealing and end cap seal ring 20.
Be with the difference of above-mentioned two embodiments, the present embodiment does not utilize convergent jet pipe to build the environment of pressure-fired, but relies on the air current flow of blower interior to build the environment of pressure-fired to resist the invasion of external air flow completely.
In addition, the present embodiment additionally provides a kind of permanent magnet direct-driving aerogenerator system, and can comprise as above-mentioned wind-driven generator and the air supply system 12 being arranged on Wind turbines inside, air supply system 12 can be connected with the first pore 2.Wherein, the structure of air supply system 12 is identical with embodiment one with setting.
Below the Alternate embodiments in the air current flow path to the gas channel in said stator structure, the air supply system being arranged on Wind turbines inside and blower interior is described in detail.
(1) gas channel of stator core inside
As shown in Figure 9, the same with embodiment one, gas channel 9 can comprise radial air flow passage 92 and axial flow passage 91, radial air flow passage 92 can pass the inside of punching retainingf key 7 and stator core 8, one end of radial air flow passage 92 is connected with the first pore 2, and the other end is connected with axial flow passage 91.Be with embodiment one difference, axial flow passage 91 can pass axially through inside and the 3rd pore 21 UNICOM of stator core 8.
In addition, first pore 2, the 3rd pore 21 and gas channel 9 can be multiple and quantity is equal, circumferentially impartial setting, wherein, multiple first pore 2, the 3rd pore 21 and the corresponding UNICOM of gas channel 9, form many gas channels 9 independently from the inwall of stator support 1 to tower side tooth support 10.
(2) air supply system of Wind turbines inside
The structure of air supply system 12 and associated components identical with embodiment one.
(3) air current flow path
The pressure-fired environment of the present embodiment does not realize by convergent jet pipe, but utilizes the shutoff of tower side seal 22 pairs of air-flows to realize.
As shown in Figure 9, the small arrow shown in figure represents the circulation path of air-flow.Particularly, in cabin, air draught delivers to the first pore 2 on stator support 1 after the filtration drying compression of air supply system 12, air-flow is entered the radial air flow passage 92 of stator core 8 through punching retainingf key 7 by the first pore 2, air-flow radially gas channel 92 proceeds to axial flow passage 91, after in cabin, air draught arrives axial passage 91, because oar side seal closes, air-flow just flows out from the 3rd pore 21, wind direction end diffluence under generator, owing to being provided with tower side seal 22 between tower gusset plate 11 and end cap seal ring 20, shutoff has been carried out to air-flow, overwhelming majority air-flow enters again in the ring-type air gap that stator support 1 and rotor field spider 15 formed, in ring-type air gap, air-flow is through tower side winding 17, magnetic pole 18, arrive oar side winding overhang, final poly-annular gap of extruding out between oar gusset plate 3 and rotary piston sealing ring 16 enters in atmospheric environment.
The advantage of this scheme is: because dry gas stream needs the ring-type air gap that formed through stator support 1 and rotor field spider 15, therefore, drying can be carried out to the winding 17 of tower side and oar side and magnetic pole 18, side of simultaneously can also being in the wind forms pressure-fired air-flow, resists external air flow and enters motor internal.
The above; be only embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; change can be expected easily or replace, all should be encompassed within protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of described claim.
Claims (25)
1. a stator for permanent magnet direct-driving aerogenerator, is characterized in that, comprise stator support, be arranged on the stator core of the periphery wall of stator support and oar side tooth support, described oar side tooth support is arranged on the oar side axial end of described stator core,
The periphery wall of described stator support has at least one first pore, described oar side tooth support offers at least one second pore,
Described stator also includes at least one gas channel of the first pore described in UNICOM and described second pore, and described gas channel is through the inside of described stator core.
2. stator according to claim 1, it is characterized in that, the periphery wall of described stator support is fixed with punching retainingf key, and the dovetail groove of described stator core is set on described punching retainingf key, and described gas channel is through described punching retainingf key and described first pore UNICOM.
3. stator according to claim 2, it is characterized in that, described gas channel comprises radial air flow passage and axial flow passage, described radial air flow passage passes the inside of described punching retainingf key and described stator core, one end of described radial air flow passage is connected with described first pore, the other end and described axial flow expanding channels, described axial flow passage passes axially through the inside of described stator core and described second pore UNICOM.
4. stator according to claim 3, it is characterized in that, described first pore, described second pore and described gas channel is multiple and quantity is equal, circumferentially impartial setting, the corresponding UNICOM of multiple described first pore, described second pore and described gas channel, forms many current paths independently from the periphery wall of described stator support to described oar side tooth support.
5. 1 to 4 arbitrary described stator as requested, is characterized in that, described oar side tooth support is provided with the convergent jet pipe of annular, the annular entry UNICOM of described second pore and described convergent jet pipe.
6. stator according to claim 5, it is characterized in that, described stator comprises oar gusset plate, the rotor mated with described stator comprises rotary piston sealing ring, after described stator and rotor combination being installed, the ring exit of described convergent jet pipe faces toward the annulus of described oar gusset plate and the formation of described rotary piston sealing ring.
7. stator according to claim 5, it is characterized in that, the section of described convergent jet pipe is sickleshaped, comprise the vertical section of UNICOM successively, tilting section and bending section, described vertical section and described second pore UNICOM, the radial width of described vertical section is consistent and be more than or equal to the radial width of described second pore, described tilting section tilts to stator center direction on the whole, described bending section is on the whole in arc-shaped, its end forms the outlet of described convergent jet pipe, from described tilting section to the end of described bending section, described radial width reduces gradually.
8. the stator of a permanent magnet direct-driving aerogenerator, it is characterized in that, comprise stator support, be arranged on the stator core of the periphery wall of stator support, oar side tooth support and tower side tooth support, described oar side tooth support is arranged on the oar side axial end of described stator core, described tower side tooth support is arranged on the tower side axial end of described stator core
The periphery wall of described stator support has at least one first pore, described oar side tooth support offers at least one second pore, described tower side tooth support offers at least one the 3rd pore,
Described stator also comprises at least one gas channel by described first pore and described second pore and described 3rd pore UNICOM, and described gas channel is through the inside of described stator core.
9. stator according to claim 8, it is characterized in that, the periphery wall of described stator support is fixed with punching retainingf key, and the dovetail groove of described stator core is set on described punching retainingf key, and described gas channel is through described punching retainingf key and described first pore UNICOM.
10. stator according to claim 9, it is characterized in that, described gas channel comprises radial air flow passage and axial flow passage, described radial air flow passage passes the inside of described punching retainingf key and described stator core, one end of described radial air flow passage is connected with described first pore, the other end and described axial flow expanding channels, described axial flow passage passes axially through the inside of described stator core and described second pore and described 3rd pore UNICOM.
11. stators according to claim 10, it is characterized in that, described first pore, described second pore, described 3rd pore and described gas channel is multiple and quantity is equal, circumferentially impartial setting, the corresponding UNICOM of multiple described first pore, described second pore, described 3rd pore and described gas channel, forms many independently from the periphery wall of described stator support to the current path of described oar side tooth support and described tower side tooth support.
12. 8 to 11 arbitrary described stators, is characterized in that, described oar side tooth support and described tower side tooth support are respectively arranged with the convergent jet pipe of annular, the annular entry UNICOM of described second pore and described 3rd pore and described convergent jet pipe as requested.
13. stators according to claim 12, it is characterized in that, described stator comprises oar gusset plate and tower gusset plate, rotor comprises rotary piston sealing ring and end cap seal ring, after described stator and rotor combination are installed, the gap that the ring exit being arranged on the convergent jet pipe on the tooth support of described oar side is formed facing to oar gusset plate and rotary piston sealing ring, the annulus that the ring exit being arranged on the convergent jet pipe on the tooth support of described tower side is formed facing to described tower gusset plate and described end cap seal ring.
14. stators according to claim 13, it is characterized in that, the section of described convergent jet pipe is sickleshaped, comprise the vertical section of UNICOM successively, tilting section and bending section, the described vertical section being arranged on described convergent jet pipe on described oar side tooth support and described tower side tooth support respectively with described second pore and described 3rd pore UNICOM, the radial width of described vertical section is consistent and be more than or equal to the radial width of described second pore and described 3rd pore, described tilting section tilts to stator center direction on the whole, described bending section is on the whole in arc-shaped, its end forms the outlet of described convergent jet pipe, from described tilting section to the end of described bending section, described radial width reduces gradually.
15. 1 kinds of permanent magnet direct-driving aerogenerators, is characterized in that, comprise rotor and as arbitrary in claim 1 to 14 as described in stator.
The stator of 16. 1 kinds of permanent magnet direct-driving aerogenerators, is characterized in that, comprise stator support, be arranged on the stator core of the periphery wall of stator support and tower side tooth support, described tower side tooth support is arranged on the tower side axial end of described stator core,
The periphery wall of described stator support has at least one first pore, described tower side tooth support offers at least one the 3rd pore,
Described stator also includes at least one gas channel of the first pore described in UNICOM and described 3rd pore, and described gas channel is through the inside of described stator core.
17. stators according to claim 16, it is characterized in that, the periphery wall of described stator support is fixed with punching retainingf key, and the dovetail groove of described stator core is set on described punching retainingf key, and described gas channel is through described punching retainingf key and described first pore UNICOM.
18. stators according to claim 17, it is characterized in that, described gas channel comprises radial air flow passage and axial flow passage, described radial air flow passage passes the inside of described punching retainingf key and described stator core, one end of described radial air flow passage is connected with described first pore, the other end and described axial flow expanding channels, described axial flow passage passes axially through the inside of described stator core and described 3rd pore UNICOM.
19. stators according to claim 18, it is characterized in that, described first pore, described 3rd pore and described gas channel is multiple and quantity is equal, circumferentially impartial setting, the corresponding UNICOM of multiple described first pore, described 3rd pore and described gas channel, forms many current paths independently from the periphery wall of described stator support to described tower side tooth support.
20. 1 kinds of permanent magnet direct-driving aerogenerators, is characterized in that, comprise rotor and as arbitrary in claim 16 to 19 as described in stator.
21. wind-driven generators according to claim 20, it is characterized in that, described stator comprises tower gusset plate, described rotor comprises end cap seal ring, tower side seal parts are provided with between described tower gusset plate and described end cap seal ring, described tower side seal parts are fixed on a side of described tower gusset plate or described end cap seal ring, with the annulus between the mode seal tower gusset plate of movable sealing and described end cap seal ring.
22. 1 kinds of permanent magnet direct-driving aerogenerator systems, is characterized in that, comprise the wind-driven generator as described in claim 15,20 or 21 and be arranged on the air supply system of Wind turbines inside, described air supply system is connected with described first pore.
23. wind powered generator systems according to claim 22, is characterized in that, described air supply system comprises the gas source generator of the air-flow producing predetermined pressure and described air-flow carried out to the air supply processing equipment of gas source purification and dry process.
24. wind powered generator systems according to claim 23, is characterized in that, described gas source generator is air compressor, and described air supply processing equipment comprises air cleaner, cooler, oil water separator and drier.
25. wind powered generator systems according to claim 24, it is characterized in that, described air supply system is connected with described first pore with arm by female pipe, and draw the arm identical with described first pore quantity from described mother's pipe, described arm correspondence is connected on described first pore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520058961.8U CN204334142U (en) | 2015-01-27 | 2015-01-27 | Permanent magnet direct-driving aerogenerator, system and stator thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520058961.8U CN204334142U (en) | 2015-01-27 | 2015-01-27 | Permanent magnet direct-driving aerogenerator, system and stator thereof |
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| CN204334142U true CN204334142U (en) | 2015-05-13 |
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| CN201520058961.8U Withdrawn - After Issue CN204334142U (en) | 2015-01-27 | 2015-01-27 | Permanent magnet direct-driving aerogenerator, system and stator thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016119511A1 (en) * | 2015-01-27 | 2016-08-04 | 新疆金风科技股份有限公司 | Permanent-magnet direct-drive wind power generator, system and stator thereof |
| CN110635589A (en) * | 2018-09-14 | 2019-12-31 | 北京金风科创风电设备有限公司 | Stator assembly and motor having the same |
| CN110635590A (en) * | 2018-12-25 | 2019-12-31 | 北京金风科创风电设备有限公司 | Stator assembly, wind generating set and method for cooling stator assembly |
| CN112928840A (en) * | 2021-01-28 | 2021-06-08 | 浙江大学 | Generator stator and generator |
| CN113708548A (en) * | 2021-09-06 | 2021-11-26 | 华能通辽风力发电有限公司 | Air-cooled generator |
| CN115434881A (en) * | 2021-06-02 | 2022-12-06 | 新疆金风科技股份有限公司 | Wind generating set |
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2015
- 2015-01-27 CN CN201520058961.8U patent/CN204334142U/en not_active Withdrawn - After Issue
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016119511A1 (en) * | 2015-01-27 | 2016-08-04 | 新疆金风科技股份有限公司 | Permanent-magnet direct-drive wind power generator, system and stator thereof |
| CN104600886B (en) * | 2015-01-27 | 2017-01-25 | 新疆金风科技股份有限公司 | Direct drive permanent magnet wind generator, direct drive permanent magnet wind generator system and stator of direct drive permanent magnet wind generator |
| US10291101B2 (en) | 2015-01-27 | 2019-05-14 | Xinjiang Goldwind Science & Technology Co., Ltd. | Permanent-magnet direct-drive wind power generator, system and stator thereof |
| CN110635589A (en) * | 2018-09-14 | 2019-12-31 | 北京金风科创风电设备有限公司 | Stator assembly and motor having the same |
| CN110635589B (en) * | 2018-09-14 | 2020-12-04 | 北京金风科创风电设备有限公司 | Stator assembly and motor having the same |
| US11384741B2 (en) | 2018-09-14 | 2022-07-12 | Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. | Stator assembly, electric machine and wind turbine having the stator assembly |
| CN110635590A (en) * | 2018-12-25 | 2019-12-31 | 北京金风科创风电设备有限公司 | Stator assembly, wind generating set and method for cooling stator assembly |
| CN112928840A (en) * | 2021-01-28 | 2021-06-08 | 浙江大学 | Generator stator and generator |
| CN115434881A (en) * | 2021-06-02 | 2022-12-06 | 新疆金风科技股份有限公司 | Wind generating set |
| CN113708548A (en) * | 2021-09-06 | 2021-11-26 | 华能通辽风力发电有限公司 | Air-cooled generator |
| CN113708548B (en) * | 2021-09-06 | 2023-12-08 | 华能通辽风力发电有限公司 | Air-cooled generator |
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