Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K9/00—Arrangements for cooling or ventilating
  • H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
  • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K1/00—Details of the magnetic circuit
  • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
  • H02K1/22—Rotating parts of the magnetic circuit
  • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
  • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
  • H02K7/1807—Rotary generators
  • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
  • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
  • H02K7/1838—Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/70—Wind energy
  • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

• the invention relates to a wind power generator with an internal cooling circuit with a laminated stator, which has a winding system which forms winding heads on the front sides of the stator, wherein the stator is surrounded at least in the region of its laminated core by a cooling jacket, wherein permanent magnets of a rotor on a Arranged as a hollow ⁇ wave Polradmantel are arranged.
• Wind power generators like other dynamo-electric machines, require cooling of their active parts.
• the interior of the wind power generator ie the electrical area is endangered by foreign bodies or aggressive media, which inter alia attack the insulation or affect the elekt ⁇ cal strength. This leads to Radiobe ⁇ impairments or failure of the wind power generator. Therefore, it is common in dynamoelectric machines in such an environment to provide a closed internal cooling circuit, which is optionally recooled by external coolers.
• This Maschi ⁇ ne has a stator and a rotor, wherein the stator and rotor each have cooling channels, which are arranged as part of a cooling circuit for a cooling medium for cooling of the stator and rotor.
• the stator channels are formed as recesses in the stator from ⁇ with the stator channels limiting ridge on the outer periphery of the stator and schrau ⁇ benförmig and more consistently out cooling channels for a further cooling medium in a stator housing to the stator housing.
• cooling medium increases in the Läu ⁇ ferkanäle heat from the rotor and outputs it in the rack channels on the stand.
• DE 101 07 298 Cl a closed electric machine with surface cooling with a closed inner cooling medium circuit over the rotor body is known.
• cooling medium channels are present in the rotor on different pitch circles of the rotor body cross section for different flow directions.
• a wind power generator with a closed internal cooling circuit, with a laminated runner having a winding system which forms on the front sides of the stator winding ⁇ heads, the stator at least in the range of his laminated core of a Cooling jacket is surrounded, with Per ⁇ manentmagnete a rotor are arranged on a hollow shaft
• the Polradmantel is rotatably connected via support members at its ends with a shaft or stub shafts, the hollow shaft having in its interior at least one tube whose Mantelflä ⁇ che in equidistant distance to the Polradmantel runs, and wherein on the front sides of the rotor fans are mounted.
• the fans on the front sides of the rotor are not only designed as pure radial fan, the fan blades are attached only to a hub, but the fan blades or blades are connected to one another at one axial end by a support disc.
• a support disc To avoid this supporting discs of the respective fans take over air control functions within the closed interior of the Windkraftgenera ⁇ tors so fluidic "short circuits".
• ⁇ tet In order for a prescribed cooling current profile is provided leis ⁇ tet.
• Advantageous ⁇ adhesive enough is at an axial end of the wind power generator is attached to the B-side of an external, in particular decreasing ⁇ Barer heat exchanger, in particular a ring radiator and integrated into the flow of coolant such that the coolant flow of the internal cooling circuit is recooled there.
• FIG. 2 shows a cross section of a wind generator.
• FIG. 1 shows, in a basic representation, a longitudinal section of a wind power generator 1 with a side A and a side B, the side A of the wind turbine of a wind turbine not shown in more detail. turned wind turbine is facing.
• the mechanical coupling to the wind turbine itself takes place via a shaft or at least one stub shaft 7 directly or via a transmission.
• the wind power generator 1 is housed in a housing 2, which has an inlet and an outlet opening 14, 15, which serve for the coolant supply and removal of a cooling jacket 3, which is arranged between the housing 2 and the stator 4.
• a cooling jacket 3 and flowing in the cooling channels 17 cooling medium the losses are removed from the laminated core of the stator 4.
• Wi ⁇ ckelkexcellent 10 are formed on the end faces of the laminated core of the stator 4, which are to be fixed by stiffening elements 16 due to their axial projection, so that movements of the winding head 10 are excluded, for example due to elektrody ⁇ namischer balancing operations.
• a rotor 5, which has a Polradmantel 6 is rotatably connected by means of support elements 28, in particular at the axial ends of the Polradmantels 6 with a shaft or stub shafts 7.
• the Polradmantel 6 has poles, the insbesonde ⁇ re are formed by permanent magnets 18. Each pole has, depending on the axial length of the rotor 5 and Polumble a plurality of successively and / or juxtaposed permanent magnets 18.
• the Polradmantel 6 of the rotor 5 together with the support members 28 is a hollow shaft which is according to the invention to be ⁇ uses to create an opposite flow direction of a gasför ⁇ -shaped coolant of the wind power generator 1 in the closed interior. This is achieved in that within the hollow shaft, so ra ⁇ dial within the Polradmantels 6 tubes 29, 33 are arranged to create the predeterminable spaces within the hollow shaft. Furthermore, these tubes serve 29, 33 together with the support elements 28 of the stiffening of the entire hollow shaft, so that in this way also mechanical vibrations or impermissible torsional movements are suppressed.
• fans 24, 25 are arranged, which give the cooling air flow within the closed dynamoelectric machine sufficient flow velocity.
• an A-side fan 24 and a B-side fan 25 are provided.
• the A-side fan 24 is advantageously attached to the Polradmantel 6 radially next lying tube 29 and thus creates in addition to a ra ⁇ Dialen promotion of passing from the hollow shaft cooling air flow at the same time a separation of the opposing ver ⁇ running cooling air streams at the beginning of the hollow shaft. This is achieved in particular in that the A-side fan 24 has a support plate 13 which faces the rotor 5.
• the B-side fan 25 is also attached to the tube 29 and / or to the existing support member 28 there. Also, the Lüf ⁇ tereriel this fan 25 is moun- ted on a supporting plate 12, so that in addition to promoting the cooling air flow in the radial direction and flowing back to the partitioning of the cooling air flow is ensured from a heat exchanger.
• the A-side fan 24 now sucks a cooling air flow 30 from the inner region of the hollow shaft, this cooling air flow has already been pre-cooled by a heat exchanger 9.
• the heat exchanger 9 is mounted on a housing plate 27, which is supported via a bearing 19 on the shaft or a stub shaft 7. Through openings 20 of the housing shield 27 and further openings 23 in the support elements 28, the A-side fan 24 suck this cooling air flow through the inner part of the hollow shaft.
• the A-side fan 24 now pushes the pre-cooled cooling air flow 30 radially in the direction of the winding Kopf 10, who strokes there over the winding head 10 and absorbs heat there.
• the cooling air stream 30 splits into two partial streams.
• a partial flow 31 flows through the active part of the rotor 5 by possibly existing substantially axially extending Pol ⁇ gaps and / or the air gap 8.
• the other partial stream 32 is via the support plate 13 of the A-side fan 24 in a radially extending inside the pole jacket 6 axial cooling duct between Polradmantel and pipe 29 is directed and sucked in there via the B-side fan 25.
• the two partial streams 31 and 32 unite and are amplified by this B-side fan 25 in its flow velocity and deflected to the second winding head 10.
• the ⁇ ser now flows through guide elements 11 and ring lines and is directed after passing through the housing 27 by an air guide hood 26 mounted on the housing plate 27 heat exchanger 9. After passing through the heat exchanger 9, the cooling air is sucked in again by the A-side fan 24 through the air duct formed by the tubes 29 and 33 within the hollow shaft. In this way, this inner cooling circuit closes.
• cooling jacket 3 in a further embodiment axially even further than in FIG 1 protrudes beyond the winding heads 10, insbe ⁇ special adapted to the length of the housing 2, in addition to the circulating cooling air inside the winding heads are additionally cooled, resulting in a discharge of the heat exchanger 9 leads.
• FIG. 2 shows a cross section of a wind power generator, with respect. of the stator 4, the housing 2, the cooling jacket 3 and the coolant course within the wind power generator 1, as shown in FIG.
• the cooling channel design on the axial length of the rotor 5 is now ensured by the openings 40 between the struts 38, the Polradmantel 6 and the tube 29.
• the one cooling channel is formed by the surface 41 of the shaft 39 and the inside of the tube 29.
• the flow in the opposite direction of this cooling channel during operation other cooling channel is formed by the inside of the Polradmantels 6 and the outer ⁇ side of the tube 29.
• the struts 38 are designed in the respective cooling channel so that during operation of the Windkraftgenera ⁇ sector 1, the coolant flow is supported.
• these struts 38 have a ventilator-wing-shaped construction which supports the axial flow. That is, at least some struts 38 have radially under half of the tube 29 has a different shape than radially above the tube 29.
• the inside of the rotor 5, ie radially inside the Polradmantels 6 opposite direction coolant flow is supported.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Motor Or Generator Cooling System (AREA)
• Iron Core Of Rotating Electric Machines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43466469

Family Applications (1)

Country Status (7)

Families Citing this family (40)

Family Cites Families (35)

• 2009
  • 2009-11-02 DE DE102009051651A patent/DE102009051651B4/de not_active Expired - Fee Related
• 2010
  • 2010-10-25 US US13/505,377 patent/US9287747B2/en not_active Expired - Fee Related
  • 2010-10-25 WO PCT/EP2010/066068 patent/WO2011051228A2/de active Application Filing
  • 2010-10-25 CN CN201080049568.2A patent/CN102598479B/zh not_active Expired - Fee Related
  • 2010-10-25 RU RU2012122746/07A patent/RU2519061C2/ru not_active IP Right Cessation
  • 2010-10-25 BR BR112012011582A patent/BR112012011582A2/pt not_active Application Discontinuation
  • 2010-10-25 EP EP10775764A patent/EP2497184A2/de not_active Withdrawn

Non-Patent Citations (1)

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