WO2020103172A1 - Stator junction box and wind turbine - Google Patents

Stator junction box and wind turbine

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Publication number
WO2020103172A1
WO2020103172A1 PCT/CN2018/117756 CN2018117756W WO2020103172A1 WO 2020103172 A1 WO2020103172 A1 WO 2020103172A1 CN 2018117756 W CN2018117756 W CN 2018117756W WO 2020103172 A1 WO2020103172 A1 WO 2020103172A1
Authority
WO
WIPO (PCT)
Prior art keywords
wind
zone
air
box body
junction box
Prior art date
Application number
PCT/CN2018/117756
Other languages
French (fr)
Chinese (zh)
Inventor
霍永强
李新奇
张广兴
崔皓
杨建华
刘军婷
荆卫峰
Original Assignee
中车永济电机有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中车永济电机有限公司 filed Critical 中车永济电机有限公司
Publication of WO2020103172A1 publication Critical patent/WO2020103172A1/en

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Classifications

    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/08—Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
    • 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 the technical field of wind power generators, in particular to a stator junction box and a wind power generator.
  • the stator junction box is an important part of the wind generator, and the electrical energy generated by the generator is output through the cables and copper bars provided inside it. Due to the yaw requirements of the wind turbine cabin, the stator junction box generally uses anti-twist cables, and the upper limit of the working temperature of the anti-twist cables for long-term service is 90 ° C.
  • the stator junction box is generally directly connected to the frame of the wind generator.
  • the heat of the wind generator will be transferred to the junction box, causing the temperature of the junction box to rise, which does not Conducive to the normal use of the anti-twist cable in the junction box.
  • the natural radiation of the box body of the stator junction box is used to maintain the temperature of the stator junction box not to increase excessively, so as to ensure the normal operation of the anti-twist cable.
  • stator junction box can only rely on the heat exchange between the box body and the outside air for heat dissipation, which cannot ensure that the anti-torsion cable of the wind turbine is effectively dissipated, which reduces the operation of the wind turbine Reliability.
  • the invention provides a stator junction box and a wind generator to solve the problem that the stator junction box can only rely on the heat exchange between the box body and the outside air for heat dissipation, and the anti-twist cable cannot be effectively dissipated.
  • the present invention provides a stator junction box, which is applied to a wind power generator and includes a box body connected to a base of the wind power generator; the box body forms a hollow cavity, and the box body has an air inlet and an air outlet.
  • the air outlet is connected to the first wind zone of the wind generator, the air outlet is connected to the second wind zone of the wind generator, and the box body forms a cooling air path between the first wind zone and the second wind zone to circulate the box body Cooling, wherein the air pressure in the first wind zone is greater than the air pressure in the second wind zone.
  • the first wind zone is the cold wind zone of the wind turbine
  • the second wind zone is the hot wind zone of the wind turbine.
  • the first wind zone is a cold wind zone of the wind turbine
  • the second wind zone is a secondary cold wind zone of the wind turbine.
  • the box body includes a bottom plate, and the air inlet and the air outlet are provided on the bottom plate.
  • stator junction box further includes a first air duct and a second air duct;
  • the first end of the first air duct is located in the first wind zone, and the second end of the first air duct passes through the air inlet and extends into the box; the first end of the second air duct is located in the second wind zone, The second end of the second air duct passes through the air outlet and extends into the box body.
  • the second end of the first air duct is located at the bottom of the bottom plate, and the second end of the second air duct is located at the top of the bottom plate.
  • At least one connecting block is provided between the box body and the base of the wind turbine, and the box body and the base are connected by the connecting block, and the cross-sectional area of the connecting block in a direction perpendicular to the connection direction of the box body and the base is smaller than the box The cross-sectional area of the body in this direction.
  • the thickness of the connecting block in the connecting direction of the box body and the base is 20-30 mm.
  • cables and copper bars are provided inside the box.
  • the present invention provides a wind turbine including the stator junction box as described above.
  • the invention provides a stator junction box and a wind generator.
  • the stator junction box is applied to a wind generator and includes a box body, which is connected to the base of the wind generator; the box body forms a hollow cavity, and the box body has an air inlet and an outlet The air inlet, the air inlet are connected to the first wind zone of the wind generator, the air outlet is connected to the second wind zone of the wind generator, and the box body forms a cooling air path between the first wind zone and the second wind zone The body is circulated and cooled, wherein the air pressure in the first wind zone is greater than the air pressure in the second wind zone.
  • the air inlet and the air outlet are respectively connected to the first wind zone and the second wind zone of the wind generator, and the air pressure in the first wind zone is greater than that in the second wind zone.
  • the cold air enters the box body from the air inlet, cools the box, and then discharges from the air outlet. This forms a cooling air path in the box, which can circulate the stator junction box to ensure the anti-rotation in the stator junction box
  • the cable is effectively dissipated, which in turn ensures the reliable operation of the wind turbine.
  • Figure 1 is a partial schematic diagram of the connection between the existing stator junction box and the wind generator
  • FIG. 2 is a front view of the connection between the stator junction box and the wind generator provided in Embodiment 1 of the present invention
  • FIG. 3 is a schematic structural diagram of a wind power generator according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic structural diagram of another wind turbine according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic structural diagram of a connection block on a wind turbine provided by Embodiment 1 of the present invention.
  • the stator junction box is an important part of the wind generator.
  • the stator junction box is generally provided with copper bars and cables, and the electrical energy generated by the wind generator is output through the copper bars and cables. Due to the yaw requirements of the nacelle of the wind turbine (the wind turbine captures the wind in all directions through the impeller provided outside the nacelle and transmits the wind to the rotor shaft system), the anti-torsion cable is used in the stator junction box.
  • the upper limit of the working temperature that the cable can adapt to during long-term service is about 90 °C. Therefore, the working temperature of the stator junction box must not be too high.
  • the stator junction box should have good heat dissipation capacity to ensure the normal operation of the anti-twist cable.
  • FIG. 1 is a partial schematic diagram of the connection between the existing stator junction box and the wind generator.
  • the stator junction box 1 is directly connected to the chassis 2 of the wind generator, and the stator junction box 1 relies on the heat exchange between the box body and the outside air for heat dissipation, so that the heat of the wind generator will pass through the machine
  • the seat 2 conducts directly to the stator junction box 1, which intensifies the heating of the box body of the stator junction box 1.
  • the stator junction box 1 can only rely on its own natural heat dissipation to conduct the heat to the surrounding air.
  • the following embodiments provide an improved stator junction box and wind generator.
  • the stator junction box can also be circulated and cooled by the cold wind of the wind generator to ensure that The stator junction box is effectively dissipated, thereby ensuring that the anti-twist cable inside the stator junction box can work normally, thereby improving the reliability of the wind generator operation.
  • This embodiment provides a stator junction box, which is applied to a wind power generator 200, and includes a box body 100 connected to a base 210 of the wind power generator 200; the box body 100 forms a hollow cavity, and the box body 100 has an air inlet 110 is connected to the air outlet 120, the air inlet 110 is connected to the first wind zone 220 of the wind generator 200, the air outlet 120 is connected to the second wind zone 230 of the wind generator 200, and the box 100 is located at the first wind zone 220 and the second Cooling air passages are formed between the wind zones 230 to circulate and cool the case 100, wherein the air pressure of the first wind zone 220 is greater than the air pressure of the second wind zone 230.
  • the stator junction box mainly includes a box body 100 which is the main structure of the stator junction box.
  • the box body 100 may form a hollow cavity.
  • the box body 100 has an air inlet 110 and an air outlet 120. Outside air can enter the inside of the box 100 from the air inlet 110 of the box 100 and then be discharged from the air outlet 120 of the box 100.
  • the air inlet 110 is connected to the first wind zone 220 of the wind generator 200
  • the air outlet 120 is connected to the second wind zone 230 of the wind generator 200.
  • the pressure of the first wind zone 220 is greater than that of the second wind zone 230
  • the cold wind of the wind turbine 200 enters the box 100 from the first wind zone 220 through the air inlet 110 to cool the box 100, and then the wind inside the box 100 is discharged into the wind power generation through the air outlet 120
  • the second wind zone 230 of the machine 200 The second wind zone 230 of the machine 200.
  • the box body 100 communicates with the first wind zone 220 and the second wind zone 230 of the wind turbine 200 through the air inlet 110 and the air outlet 120 to form a cooling air passage inside the box body 100.
  • the cold wind naturally enters the inside of the box 100 through the air inlet 110 from the first wind zone 220 with a higher air pressure, exchanges heat with the box 100, takes away part of the heat of the box 100, and the hot air formed after the heat exchange passes through the air outlet 120 naturally discharges to the second wind zone 230 with lower air pressure.
  • stator junction box of this embodiment communicates with the first wind zone 220 and the second wind zone 230 of the wind generator 200 to send the cold wind of the wind generator 200 into the box body 100 of the stator junction box.
  • the cold wind generated by the wind turbine 200 is used to circulate and cool the stator junction box, thereby reducing the temperature of the anti-twist cable inside the stator junction box, ensuring that the anti-twist cable can work normally, and improving the reliability of the anti-twist cable operation;
  • the stator junction box effectively uses the cold wind generated by the wind generator 200 itself, and uses the pressure difference inside the wind generator 200 to make the cold wind naturally enter from the air inlet 110 and move to the air outlet 120 after being discharged, without the need to introduce
  • the other newly added cooling equipment has a simple structure and can produce an effective cooling effect, and at the same time, no additional cost is added due to the newly added cooling equipment, and the energy generated by the wind turbine 200 is recycled.
  • the first wind zone 220 may be a cold wind zone of the wind turbine 200
  • the second wind zone 230 may be a hot wind zone of the wind turbine 200
  • the wind turbine 200 may include a cold wind zone and a hot wind zone
  • the first wind zone 220 may be a cold wind zone
  • the second wind zone 230 may be a hot wind zone.
  • the cold air with a higher air pressure in the cold air zone enters the interior of the box 100 of the stator junction box through the air inlet 110, and cools the box 100.
  • the temperature of the cold wind after the heat exchange increases, and then moves to the air outlet 120 to be discharged to the hot wind area of the wind turbine 200.
  • the cold wind in the cold wind zone continuously enters the box 100 through the air inlet 110, cools and cools the box 100, and then is discharged to the hot air zone through the air outlet 120.
  • This cyclic reciprocating process realizes the box of the stator junction box 100 circulation cooling.
  • the wind generator 200 having a cold wind zone and a hot wind zone may be a certain type of air-cooled wind generator 200 with a top drive fan.
  • the first wind zone 220 may be a cold wind zone of the wind turbine 200
  • the second wind zone 230 may be a sub-cold wind zone of the wind turbine 200
  • the wind turbine 200 may include a cold wind zone and a sub-cold wind zone
  • the first wind zone 220 may be a cold wind zone
  • the second wind zone 230 may be a sub-cold wind zone.
  • the cold air with a higher air pressure in the cold wind zone enters the box body 100 of the stator junction box through the air inlet 110, and the box body 100 is After cooling and cooling, the temperature of the cold wind after heat exchange increases, and then moves to the air outlet 120 to be discharged to the secondary cold wind area of the wind turbine 200.
  • the cold wind in the cold wind zone continuously enters the box body 100 through the air inlet 110, cools and cools the box body 100, and then is discharged to the secondary cold air zone through the air outlet 120.
  • This cyclic reciprocating process realizes the box of the stator junction box Circulation cooling of the body 100.
  • the wind generator 200 having a cold wind zone and a sub-cold wind zone may be a certain type of air-cooled wind generator 200 with an axial fan fan.
  • the wind turbine 200 may include a cold wind zone and a hot wind zone, may also include a cold wind zone and a sub-cold wind zone, and of course may also be other structural forms including at least two wind zones with temperature differences, depending on the wind power generation The specific type and model of the machine 200.
  • the connection between the stator junction box of this embodiment and the wind generator 200 only needs to satisfy the connection between the air inlet 110 and the wind zone of the wind generator 200 where the temperature is low and the air pressure is high, and the temperature of the air outlet 120 and the wind generator 200 is relatively high
  • the wind zone with high and low air pressure can be connected to ensure that the cold air with low temperature can naturally flow through the air inlet 110 to the interior of the box 100 of the stator junction box. After the box 100 is cooled and cooled, the temperature increases. It can naturally move to the air outlet 120 and be discharged to the wind zone where the temperature of the wind generator 200 is high and the air pressure is low.
  • the box body 100 may include a bottom plate 130, and the air inlet 110 and the air outlet 120 are provided on the bottom plate 130.
  • the box body 100 of the stator junction box includes a bottom plate 130, and the general bottom plate 130 may be disposed opposite to the outer wall of the base 210 of the wind turbine 200, that is, the connection between the wind turbine 200 and the stator junction box may be through the wind turbine
  • the outer wall of the base 210 of 200 is connected to the bottom plate 130 of the stator junction box.
  • the outer wall of the base 210 may be parallel to the bottom plate 130 of the box body 100.
  • the air inlet 110 and the air outlet 120 may also be provided on the bottom plate 130, and the bottom plate 130 and the base 210 are relatively arranged.
  • the distance between the bottom plate 130 and the base 210 is relatively close, and the air inlet 110 passes through the bottom plate 130 and the wind generator 200
  • the first wind zone 220 is connected, and the air outlet 120 is connected to the second wind zone 230 of the wind turbine 200 through the bottom plate 130.
  • This communication method can ensure that the cooling air passage is easier to realize, and the cold wind of the first wind zone 220 can pass smoothly
  • the air inlet 110 provided on the bottom plate 130 enters the inside of the box 100, and the wind after circulating inside the box 100 can also be smoothly discharged to the second wind zone 230 through the air outlet 120 provided on the bottom plate 130.
  • the box body 100 may further include a side plate and a cover plate.
  • the cover plate and the bottom plate 130 are oppositely arranged.
  • the side plate is connected between the cover plate and the bottom plate 130.
  • the cover plate, the bottom plate 130, and the side plate together enclose the box body 100. space.
  • the cooling air through-hole circulates and circulates in the closed space of the case 100 to circulate and cool the case 100.
  • a detachable connection can be formed between the cover plate and the side plate, so as to facilitate maintenance and replacement of components inside the box body 100.
  • the stator junction box may further include a first air duct 300 and a second air duct 400; the first end of the first air duct 300 is located in the first wind zone 220, and the first end of the first air duct 300 The two ends pass through the air inlet 110 and extend into the box 100; the first end of the second air duct 400 is located in the second wind zone 230, and the second end of the second air duct 400 passes through the air outlet 120 and extends into Inside the box 100.
  • the air inlet 110 communicates with the first wind zone 220 of the wind generator 200 through the first air duct 300
  • the air outlet 120 communicates with the second wind zone 230 of the wind generator 200 through the second air duct 400 That is to say, the cold air with higher air pressure in the first wind zone 220 first enters the first air duct 300, and moves in the first air duct 300 to the air inlet 110 of the stator junction box, and enters the box through the air inlet 110 Inside the body 100; the cold wind exchanges heat with the box 100 inside the box 100, taking away part of the heat from the box 100, and the temperature of the cold wind rises.
  • the cold wind moves to the air outlet 120 provided on the bottom plate 130 of the box 100, and is discharged from the air outlet 120 and enters the wind turbine 200 through the second air duct 400.
  • the temperature is higher and the air pressure is lower. Erfeng District 230.
  • the pressure distribution inside the wind turbine 200 can be determined by finite element analysis, and the first wind can be guided according to the pressure difference inside the wind turbine 200
  • the first end of the tube 300 is located in the cold wind zone of the wind generator 200, that is, the portion of the first wind zone 220 where the air pressure is high; the first end of the second air duct 400 is located in the hot wind zone of the wind generator 200 Or a sub-cold wind zone, that is, a part of the second wind zone 230 where the air pressure is low.
  • the cold wind of the first wind zone 220 in the wind turbine 200 naturally moves to the air inlet 110 of the stator junction box.
  • the hot wind with increased temperature naturally moves to the out
  • the tuyere 120 also enters the second wind zone 230.
  • the first air duct 300 and the second air duct 400 may be plastic tubes or rubber tubes
  • the plastic tube or rubber tube has better flexibility and greater elasticity, which can make the movement of the wind in the duct more flexible, so that the cold wind can smoothly enter the inside of the box 100 through the first air duct 300, and the box 100 The wind after the heat exchange is smoothly discharged to the wind generator 200 through the second air duct 400.
  • the second end of the first air duct 300 may be located at the bottom of the bottom plate 130, and the second end of the second air duct 400 may be located at the top of the bottom plate 130.
  • the second end of the first air duct 300 is located at the air inlet 110 of the box 100, and the second end of the second air duct 400 is located at the air outlet 120 of the box 100.
  • the box 100 The cooling air that cools and lowers the temperature moves from the air inlet 110 to the air outlet 120 to achieve circulating cooling of the box 100.
  • the wind at the air inlet 110 has a lower temperature and stronger air pressure
  • the wind at the air outlet 120 has a higher temperature and weaker air pressure.
  • the cold air with higher air pressure always moves from low to high At the place, after the cold wind absorbs heat, it becomes a hot wind with higher temperature and lower air pressure in the high place.
  • the air inlet 110 may be provided at the lower portion of the bottom plate 130 and the air outlet 120 may be provided at the upper portion of the bottom plate 130.
  • the cold air with lower temperature and higher air pressure enters from the air inlet 110 at the bottom of the bottom plate 130 and the box 100 performs heat exchange, and the temperature of the wind after the heat exchange rises into hot air.
  • the hot air with higher temperature and lower air pressure naturally moves to the air outlet 120 at the upper part of the bottom plate 130, and is discharged from the air outlet 120 to the wind generator 200.
  • the second end of the first air duct 300 located at the air inlet 110 of the box 100 is located at the lower portion of the bottom plate 130, and the second end of the second air duct 400 located at the air outlet 120 of the box 100 The end is located above the bottom plate 130.
  • connection block 500 may be provided between the box body 100 and the frame 210 of the wind generator 200, and the box body 100 and the frame 210 are connected and connected by the connection block 500
  • the cross-sectional area of the block 500 in the direction perpendicular to the connecting direction of the box body 100 and the base 210 is smaller than the cross-sectional area of the box body 100 in this direction.
  • FIG. 5 is a schematic structural diagram of a connection block on a wind turbine provided by Embodiment 1 of the present invention. As shown in FIG. 5, the stator junction box of this embodiment is not directly connected to the outer wall of the base 210 of the wind generator 200, but the box body 100 of the stator junction box and the base of the wind generator 200 are realized through the connection block 500 210 connection.
  • the bottom plate 130 of the box body 100 of the stator junction box and the outer wall of the base 210 of the wind turbine 200 are disposed oppositely, and the connecting block 500 may be provided between the bottom plate 130 of the box body 100 and the outer wall of the base 210 through the connecting block 500
  • the bottom plate 130 and the outer wall of the machine base 210 are connected to realize the connection between the stator junction box and the wind generator 200.
  • a connection block 500 is provided between the stator junction box and the wind generator 200, the box body 100 of the stator junction box and the wind power
  • the base 210 of the generator 200 adopts an isolated arrangement, so that there is a certain gap between the stator junction box and the wind generator 200, which can prevent the heat inside the wind generator 200 from being directly transmitted into the stator junction box through the gap in the middle Most of the heat of the wind turbine 200 can be dissipated into the surrounding space.
  • connection block 500 can effectively reduce the heat conducted by the wind turbine 200 to the stator junction box, thereby avoiding excessive heating of the stator junction box, and further reducing the working temperature of the anti-twist cable in the stator junction box to ensure The stability of the operation of the wind turbine 200.
  • a threaded through hole may be provided in the direction of the connecting block 500 perpendicular to the bottom wall 130 of the box 100 and the outer wall of the base 210.
  • the corresponding positions of the bottom wall 130 of the box 100 and the outer wall of the base 210 are also provided with through holes, threaded holes and Bolts are provided in the through holes, and the fixed connection of the stator junction box, the connection block 500 and the wind generator 200 is achieved through the bolts.
  • the cross-sectional area of the connecting block 500 in the direction perpendicular to the connecting direction of the box body 100 and the base 210 is smaller than the cross-sectional area of the box body 100 in that direction, that is, for both the connecting block 500 and the box body 100 contacting
  • the surface of the connecting block 500 is smaller than the surface of the box 100. In this case, part of the surface of the box 100 will be exposed to the outside instead of being completely blocked by the connecting block 500, which reduces the wind turbine 200 passing
  • the connection block 500 conducts heat to the stator junction box, thereby reducing the temperature of the stator junction box, which is beneficial to the heat dissipation of the stator junction box.
  • the thickness of the connecting block 500 in the connecting direction of the box body 100 and the base 210 is 20-30 mm.
  • the thickness of the connection block 500 is 20-30 mm, that is to say, there is a gap of 20-30 mm between the box body 100 and the base 210, which can prevent the heat inside the wind generator 200 from being directly transmitted into the stator junction box, through This gap dissipates the heat of the wind turbine 200 into the surrounding space.
  • the volume of the connection block 500 can be set to be small, that is, the connection between the stator junction box and the wind turbine 200 can be ensured through the connection block 500.
  • connection block 500 The length and width of the connection block 500 need to be increased accordingly, otherwise, the connection block 500 may be cracked or even broken in the thickness direction, and the stability of the connection between the box body 100 and the base 210 cannot be guaranteed.
  • the thickness of the connecting block 500 may be 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, or 30 mm, etc., and this embodiment is not specifically limited.
  • cables and copper bars are also provided inside the box 100.
  • the cable is the anti-twist cable as described above, and the electrical energy generated by the wind turbine 200 is output through the cable and the copper bar.
  • This embodiment provides a wind turbine 200.
  • the wind turbine 200 includes the stator junction box as described in the first embodiment.
  • the electrical energy generated by the wind turbine 200 is output through the cables and copper bars provided inside the stator junction box.
  • the stator junction box includes a box body 100, which is connected to the base 210 of the wind turbine 200; the box body 100 forms a hollow cavity, and the box body 100 has an air inlet 110 and an air outlet 120, and the air inlet 110 and wind power
  • the first wind zone 220 of the generator 200 communicates, the air outlet 120 communicates with the second wind zone 230 of the wind generator 200, and the box 100 forms a cooling air path between the first wind zone 220 and the second wind zone 230,
  • the box body 100 is circulated and cooled, wherein the air pressure in the first wind zone 220 is greater than the air pressure in the second wind zone 230.
  • the box body 100 is the main structure of the stator junction box.
  • the box body 100 may include a bottom plate 130, side plates, and a cover plate.
  • the cover plate and the bottom plate 130 are oppositely arranged.
  • the side plates are connected between the cover plate and the bottom plate 130.
  • the cover plate and the bottom plate 130 Together with the side panel, an enclosed space of the box body 100 is enclosed.
  • the bottom plate 130 and the base 210 of the wind turbine 200 are oppositely arranged, the bottom plate 130 is provided with an air inlet 110 and an air outlet 120, and may further include a first air duct 300 and a second air duct 400, the air inlet 110 passes The first air duct 300 communicates with the first wind zone 220 of the wind turbine 200, and the air outlet 120 communicates with the second wind zone 230 of the wind turbine 200 through the second wind duct 400.
  • the air pressure of the first wind zone 220 of the wind turbine 200 is greater than that of the second wind zone 230.
  • the first wind zone 220 may be the cold wind zone of the wind generator 200
  • the second wind zone 230 may be the hot wind zone of the wind generator 200 Or sub-cold wind zone.
  • the cold wind with lower temperature and higher air pressure enters the interior of the box 100 from the first wind zone 220 through the first air duct 300 and the air inlet 110 of the box 100, and exchanges heat with the box 100 to cool the box 100
  • the temperature of the cold wind after the heat exchange rises into hot air, and the hot wind moves to the air outlet 120 of the box 100, and is discharged to the second wind turbine 200 through the second air duct 400 communicating with the air outlet 120 Wind zone 230.
  • stator junction box can be cyclically cooled to improve the heat dissipation effect of the stator junction box, ensure that the anti-twist cable inside the stator junction box is effectively dissipated, and thus improve the reliability of the wind generator 200 operation.
  • connection block 500 may be provided between the bottom plate 130 of the stator junction box and the base 210 of the wind turbine generator 200, and the connection between the stator junction box and the wind turbine generator 200 may be achieved through the connection block 500 to control the thickness of the stator junction box at Within a suitable range, a gap is formed between the bottom plate 130 of the stator junction box and the base 210 of the wind generator 200, which reduces heat conduction between the wind generator 200 and the stator junction box, and reduces the temperature of the stator junction box itself.
  • the invention provides a stator junction box and a wind generator.
  • the stator junction box is applied to a wind generator and includes a box body, which is connected to the base of the wind generator; the box body forms a hollow cavity, and the box body has an air inlet and an outlet The air inlet, the air inlet are connected to the first wind zone of the wind generator, the air outlet is connected to the second wind zone of the wind generator, and the box body forms a cooling air path between the first wind zone and the second wind zone The body is circulated and cooled, wherein the air pressure in the first wind zone is greater than the air pressure in the second wind zone.
  • the air inlet and the air outlet are respectively connected to the first wind zone and the second wind zone of the wind generator, and the air pressure in the first wind zone is greater than that in the second wind zone.
  • the cold air enters the box body from the air inlet, cools the box, and then discharges from the air outlet. This forms a cooling air path in the box, which can circulate the stator junction box to ensure the anti-rotation in the stator junction box
  • the cable is effectively dissipated, which in turn ensures the reliable operation of the wind turbine.
  • the terms “installation”, “connected”, “connected”, “fixed”, etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or be integrated; it can be Direct connection, or indirect connection through an intermediary, can make the connection between the two components or the interaction between the two components.
  • the terms “first”, “second”, etc. are for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Wind Motors (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The present invention provides a stator junction box and a wind turbine. The stator junction box of the present invention is applicable to a wind turbine, and comprises a box body. The box body is connected to a base of the wind turbine. A hollow cavity is formed in the box body. The box body is provided with an air inlet and an air outlet. The air inlet is in communication with a first wind area of the wind turbine. The air outlet is in communication with a second wind area of the wind turbine. In the box body, a cooling air path is formed between the first and second wind areas to cyclically cool the box body. The air pressure in the first wind area is greater than that in the second wind area. According to the stator junction box of the present invention, the provision of an air inlet and an air outlet, and the use of cold wind from the wind turbine to cyclically cooling the box body can enable the heat of torsion-resistant cables in the stator junction box to be effectively radiated, so that the reliable operation of the wind turbine is ensured.

Description

定子接线盒及风力发电机Stator junction box and wind generator 技术领域Technical field
本发明涉及风力发电机技术领域，尤其涉及一种定子接线盒及风力发电机。The invention relates to the technical field of wind power generators, in particular to a stator junction box and a wind power generator.
背景技术Background technique
定子接线盒是风力发电机的重要零部件，通过其内部设置的电缆和铜排将发电机产生的电能进行输出。由于风力发电机舱的偏航要求，定子接线盒一般使用的都是抗扭转电缆，抗扭转电缆长期服役的工作温度的上限为90℃。The stator junction box is an important part of the wind generator, and the electrical energy generated by the generator is output through the cables and copper bars provided inside it. Due to the yaw requirements of the wind turbine cabin, the stator junction box generally uses anti-twist cables, and the upper limit of the working temperature of the anti-twist cables for long-term service is 90 ° C.
由于风力发电机运行时产生的热量较多，而定子接线盒一般都是和风力发电机的机座直接相连，风力发电机的热量会传导至接线盒，致使接线盒的温度升高，这不利于接线盒内的抗扭转电缆的正常使用。通常都是利用定子接线盒的盒体的自然辐射散热，维持定子接线盒的温度不过度升高，以保证抗扭转电缆的正常工作。Since the wind generator generates more heat during operation, the stator junction box is generally directly connected to the frame of the wind generator. The heat of the wind generator will be transferred to the junction box, causing the temperature of the junction box to rise, which does not Conducive to the normal use of the anti-twist cable in the junction box. Usually, the natural radiation of the box body of the stator junction box is used to maintain the temperature of the stator junction box not to increase excessively, so as to ensure the normal operation of the anti-twist cable.
但是，随着风力发电机功率的不断增大，定子接线盒只能依靠自身盒体与外界空气的热交换进行散热，无法确保风力发电机的抗扭转电缆得到有效散热，降低了风力发电机运行的可靠性。However, as the power of the wind turbine continues to increase, the stator junction box can only rely on the heat exchange between the box body and the outside air for heat dissipation, which cannot ensure that the anti-torsion cable of the wind turbine is effectively dissipated, which reduces the operation of the wind turbine Reliability.
发明内容Summary of the invention
本发明提供一种定子接线盒及风力发电机，以解决定子接线盒只能依靠自身盒体与外界空气的热交换进行散热，抗扭转电缆无法得到有效散热的问题。The invention provides a stator junction box and a wind generator to solve the problem that the stator junction box can only rely on the heat exchange between the box body and the outside air for heat dissipation, and the anti-twist cable cannot be effectively dissipated.
一方面，本发明提供一种定子接线盒，应用于风力发电机，包括盒体，盒体和风力发电机的机座连接；盒体形成中空腔体，盒体具有进风口和出风口，进风口和风力发电机的第一风区连通，出风口和风力发电机的第二风区连通，盒体在第一风区和第二风区之间形成冷却风通路，以对盒体进行循环冷却，其中，第一风区的气压大于第二风区的气压。On the one hand, the present invention provides a stator junction box, which is applied to a wind power generator and includes a box body connected to a base of the wind power generator; the box body forms a hollow cavity, and the box body has an air inlet and an air outlet. The air outlet is connected to the first wind zone of the wind generator, the air outlet is connected to the second wind zone of the wind generator, and the box body forms a cooling air path between the first wind zone and the second wind zone to circulate the box body Cooling, wherein the air pressure in the first wind zone is greater than the air pressure in the second wind zone.
可选的，第一风区为风力发电机的冷风区，第二风区为风力发电机 的热风区。Optionally, the first wind zone is the cold wind zone of the wind turbine, and the second wind zone is the hot wind zone of the wind turbine.
可选的，第一风区为风力发电机的冷风区，第二风区为风力发电机的次冷风区。Optionally, the first wind zone is a cold wind zone of the wind turbine, and the second wind zone is a secondary cold wind zone of the wind turbine.
可选的，盒体包括底板，进风口和出风口设置在底板上。Optionally, the box body includes a bottom plate, and the air inlet and the air outlet are provided on the bottom plate.
可选的，定子接线盒还包括第一导风管和第二导风管；Optionally, the stator junction box further includes a first air duct and a second air duct;
第一导风管的第一端位于第一风区，第一导风管的第二端穿过进风口并伸入盒体内部；第二导风管的第一端位于第二风区，第二导风管的第二端穿过出风口并伸入盒体内部。The first end of the first air duct is located in the first wind zone, and the second end of the first air duct passes through the air inlet and extends into the box; the first end of the second air duct is located in the second wind zone, The second end of the second air duct passes through the air outlet and extends into the box body.
可选的，第一导风管的第二端位于底板下部，第二导风管的第二端位于底板上部。Optionally, the second end of the first air duct is located at the bottom of the bottom plate, and the second end of the second air duct is located at the top of the bottom plate.
可选的，盒体和风力发电机的机座之间设置有至少一个连接块，盒体和机座通过连接块连接，连接块在垂直于盒体和机座连接方向上的截面面积小于盒体在该方向上的截面面积。Optionally, at least one connecting block is provided between the box body and the base of the wind turbine, and the box body and the base are connected by the connecting block, and the cross-sectional area of the connecting block in a direction perpendicular to the connection direction of the box body and the base is smaller than the box The cross-sectional area of the body in this direction.
可选的，连接块在沿盒体和机座连接方向上的厚度为20-30毫米。Optionally, the thickness of the connecting block in the connecting direction of the box body and the base is 20-30 mm.
可选的，盒体内部设置有电缆和铜排。Optionally, cables and copper bars are provided inside the box.
另一方面，本发明提供一种风力发电机，包括如上所述的定子接线盒。In another aspect, the present invention provides a wind turbine including the stator junction box as described above.
本发明提供的定子接线盒及风力发电机，定子接线盒应用于风力发电机，包括盒体，盒体和风力发电机的机座连接；盒体形成中空腔体，盒体具有进风口和出风口，进风口和风力发电机的第一风区连通，出风口和风力发电机的第二风区连通，盒体在第一风区和第二风区之间形成冷却风通路，以对盒体进行循环冷却，其中，第一风区的气压大于第二风区的气压。通过在盒体内设置进风口和出风口，进风口和出风口分别和风力发电机的第一风区和第二风区连通，第一风区的气压大于第二风区的气压，风力发电机的冷风从进风口进入盒体内部，对盒体进行冷却后，再从出风口排出，这样在盒体内形成冷却风通路，可对定子接线盒进行循环冷却，以确保定子接线盒内的抗扭转电缆得到有效散热，进而确保了风力发电机的可靠运行。The invention provides a stator junction box and a wind generator. The stator junction box is applied to a wind generator and includes a box body, which is connected to the base of the wind generator; the box body forms a hollow cavity, and the box body has an air inlet and an outlet The air inlet, the air inlet are connected to the first wind zone of the wind generator, the air outlet is connected to the second wind zone of the wind generator, and the box body forms a cooling air path between the first wind zone and the second wind zone The body is circulated and cooled, wherein the air pressure in the first wind zone is greater than the air pressure in the second wind zone. By providing an air inlet and an air outlet in the box body, the air inlet and the air outlet are respectively connected to the first wind zone and the second wind zone of the wind generator, and the air pressure in the first wind zone is greater than that in the second wind zone. The cold air enters the box body from the air inlet, cools the box, and then discharges from the air outlet. This forms a cooling air path in the box, which can circulate the stator junction box to ensure the anti-rotation in the stator junction box The cable is effectively dissipated, which in turn ensures the reliable operation of the wind turbine.
附图说明BRIEF DESCRIPTION
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单介绍，显而易见地，下面描述中的附图是本发明的一些实施例。对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are Some embodiments of the invention. For those of ordinary skill in the art, without paying any creative work, other drawings can be obtained based on these drawings.
图1为现有的定子接线盒和风力发电机连接的局部示意图；Figure 1 is a partial schematic diagram of the connection between the existing stator junction box and the wind generator;
图2为本发明实施例一提供的定子接线盒与风力发电机连接的正视图；2 is a front view of the connection between the stator junction box and the wind generator provided in Embodiment 1 of the present invention;
图3为本发明实施例一提供的一种风力发电机的结构示意图；3 is a schematic structural diagram of a wind power generator according to Embodiment 1 of the present invention;
图4为本发明实施例一提供的另一种风力发电机的结构示意图；4 is a schematic structural diagram of another wind turbine according to Embodiment 1 of the present invention;
图5为本发明实施例一提供的风力发电机上的连接块的结构示意图。FIG. 5 is a schematic structural diagram of a connection block on a wind turbine provided by Embodiment 1 of the present invention.
附图标记说明：Description of reference signs:
1—定子接线盒；1—Stator junction box;
2—机座；2—The base;
100—盒体；100—Box body;
110—进风口；110—air inlet;
120—出风口；120—outlet;
130—底板；130—base plate;
200—风力发电机；200—Wind generator;
210—机座；210—frame base;
220—第一风区；220—the first wind zone;
230—第二风区；230—the second wind zone;
300—第一导风管；300—the first air duct;
400—第二导风管；400—second air duct;
500—连接块。500—Connection block.
具体实施方式detailed description
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的 实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.
定子接线盒是风力发电机的重要零部件，定子接线盒内一般设置有铜排和电缆，通过铜排和电缆对风力发电机产生的电能进行输出。由于风力发电机的机舱的偏航要求(风力发电机通过其机舱外设置的叶轮捉获各个方向的风，并将风力传送至转子轴系)，定子接线盒内使用的是抗扭转电缆，该电缆长期服役时能适应的工作温度的上限为90℃左右，因此需要定子接线盒的工作温度也不能过高，定子接线盒应具备良好的散热能力，以确保抗扭转电缆的正常工作。The stator junction box is an important part of the wind generator. The stator junction box is generally provided with copper bars and cables, and the electrical energy generated by the wind generator is output through the copper bars and cables. Due to the yaw requirements of the nacelle of the wind turbine (the wind turbine captures the wind in all directions through the impeller provided outside the nacelle and transmits the wind to the rotor shaft system), the anti-torsion cable is used in the stator junction box. The upper limit of the working temperature that the cable can adapt to during long-term service is about 90 ℃. Therefore, the working temperature of the stator junction box must not be too high. The stator junction box should have good heat dissipation capacity to ensure the normal operation of the anti-twist cable.
图1为现有的定子接线盒和风力发电机连接的局部示意图。如图1所示，定子接线盒1直接与风力发电机的机座2相连，且定子接线盒1是依靠自身盒体与外界空气的热交换进行散热，这样，风力发电机的热量会通过机座2直接传导至定子接线盒1，加剧定子接线盒1的盒体的升温，定子接线盒1则只能依靠自身的自然散热，将这些热量传导至周围的空气中。FIG. 1 is a partial schematic diagram of the connection between the existing stator junction box and the wind generator. As shown in FIG. 1, the stator junction box 1 is directly connected to the chassis 2 of the wind generator, and the stator junction box 1 relies on the heat exchange between the box body and the outside air for heat dissipation, so that the heat of the wind generator will pass through the machine The seat 2 conducts directly to the stator junction box 1, which intensifies the heating of the box body of the stator junction box 1. The stator junction box 1 can only rely on its own natural heat dissipation to conduct the heat to the surrounding air.
而随着风力发电机功率的增大，仅依靠定子接线盒1自身的自然散热，已无法及时有效的对热量进行扩散，从而导致了定子接线盒1盒体的升温，进而加剧了盒体内部的抗扭转电缆的温度升高，抗扭转电缆得不到有效散热，也就无法确保抗扭转电缆的可靠运行，这会进一步降低风力发电机运行的可靠性。并且，风力发电机长期工作在室外的自然环境中，由于天气原因导致风力发电机的工作环境较为恶劣，在这种工作环境下，由于风力发电机传导至定子接线盒1的热量无法得到及时有效的扩散，进而导致的抗扭转电缆的烧损故障时有发生。With the increase of the power of the wind turbine, only relying on the natural heat dissipation of the stator junction box 1 itself, it has been unable to diffuse the heat in a timely and effective manner, resulting in the heating of the box body of the stator junction box 1, which further exacerbates the interior of the box body The temperature of the torsion-resistant cable increases, and the torsion-resistant cable does not get effective heat dissipation, so it cannot ensure the reliable operation of the torsion-resistant cable, which will further reduce the reliability of the wind turbine operation. Moreover, the wind turbine works in a natural environment outdoors for a long time, and the working environment of the wind turbine is relatively poor due to weather. In this working environment, the heat conducted by the wind turbine to the stator junction box 1 cannot be obtained in time and effectively The proliferation of the cable, which in turn causes damage to the torsion-resistant cable, occurs from time to time.
为此，下述实施例提供了一种经过改进的定子接线盒及风力发电机，定子接线盒除了依靠自身的自然散热之外，还可利用风力发电机的冷风对其进行循环冷却，可保证定子接线盒得到有效散热，进而确保定子接线盒内部的抗扭转电缆能够正常工作，以此提升风力发电机运行的可靠性。For this reason, the following embodiments provide an improved stator junction box and wind generator. In addition to relying on its own natural heat dissipation, the stator junction box can also be circulated and cooled by the cold wind of the wind generator to ensure that The stator junction box is effectively dissipated, thereby ensuring that the anti-twist cable inside the stator junction box can work normally, thereby improving the reliability of the wind generator operation.
实施例一Example one
本实施例提供一种定子接线盒，应用于风力发电机200，包括盒体100，盒体100和风力发电机200的机座210连接；盒体100形成中空腔体，盒体100具有进风口110和出风口120，进风口110和风力发电机200的第一风区220连通，出风口120和风力发电机200的第二风区230连通，盒体100在第一风区220和第二风区230之间形成冷却风通路，以对盒体100进行循环冷却，其中，第一风区220的气压大于第二风区230的气压。This embodiment provides a stator junction box, which is applied to a wind power generator 200, and includes a box body 100 connected to a base 210 of the wind power generator 200; the box body 100 forms a hollow cavity, and the box body 100 has an air inlet 110 is connected to the air outlet 120, the air inlet 110 is connected to the first wind zone 220 of the wind generator 200, the air outlet 120 is connected to the second wind zone 230 of the wind generator 200, and the box 100 is located at the first wind zone 220 and the second Cooling air passages are formed between the wind zones 230 to circulate and cool the case 100, wherein the air pressure of the first wind zone 220 is greater than the air pressure of the second wind zone 230.
图2为本发明实施例一提供的定子接线盒与风力发电机连接的正视图。如图2所示，定子接线盒主要包括盒体100，盒体100是定子接线盒的主体结构，盒体100可以形成中空腔体。盒体100上具有进风口110和出风口120，外界的风可以从盒体100的进风口110进入盒体100内部，再从盒体100的出风口120排出。2 is a front view of the connection between the stator junction box and the wind generator provided in Embodiment 1 of the present invention. As shown in FIG. 2, the stator junction box mainly includes a box body 100 which is the main structure of the stator junction box. The box body 100 may form a hollow cavity. The box body 100 has an air inlet 110 and an air outlet 120. Outside air can enter the inside of the box 100 from the air inlet 110 of the box 100 and then be discharged from the air outlet 120 of the box 100.
具体的，进风口110和风力发电机200的第一风区220连通，出风口120和风力发电机200的第二风区230连通，第一风区220的气压大于第二风区230的气压，这样，风力发电机200的冷风从第一风区220通过进风口110进入盒体100内部，对盒体100进行冷却降温，之后，盒体100内部的风通过出风口120被排入风力发电机200的第二风区230。如此，盒体100通过进风口110和出风口120与风力发电机200的第一风区220和第二风区230连通，在盒体100内部形成冷却风通路。Specifically, the air inlet 110 is connected to the first wind zone 220 of the wind generator 200, and the air outlet 120 is connected to the second wind zone 230 of the wind generator 200. The pressure of the first wind zone 220 is greater than that of the second wind zone 230 In this way, the cold wind of the wind turbine 200 enters the box 100 from the first wind zone 220 through the air inlet 110 to cool the box 100, and then the wind inside the box 100 is discharged into the wind power generation through the air outlet 120 The second wind zone 230 of the machine 200. In this way, the box body 100 communicates with the first wind zone 220 and the second wind zone 230 of the wind turbine 200 through the air inlet 110 and the air outlet 120 to form a cooling air passage inside the box body 100.
冷风从气压较大的第一风区220通过进风口110自然地进入盒体100内部，与盒体100进行热交换，带走盒体100的部分热量，进行热交换之后形成的热风通过出风口120自然的排向气压较低的第二风区230。The cold wind naturally enters the inside of the box 100 through the air inlet 110 from the first wind zone 220 with a higher air pressure, exchanges heat with the box 100, takes away part of the heat of the box 100, and the hot air formed after the heat exchange passes through the air outlet 120 naturally discharges to the second wind zone 230 with lower air pressure.
需要说明的是，本实施例的定子接线盒通过与风力发电机200的第一风区220和第二风区230连通，将风力发电机200的冷风送入定子接线盒的盒体100内部，利用风力发电机200产生的冷风对定子接线盒进行循环冷却，从而达到降低定子接线盒内部的抗扭转电缆的温度，确保抗扭转电缆能够正常工作，提高抗扭转电缆运行的可靠性；本实施例的定子接线盒有效的利用了风力发电机200本身产生的冷风，利用风力发电机200内部的压力差，使冷风自然地从进风口110进入而运动至出风口120后被排出，而不需要引入其他的新增的冷却设备，结构简单，能够产生有效的冷却降温效果，同时不会因为新增冷却设备而增加额外的成本，做到了对风力发电机200产生的能 量的循环利用。It should be noted that the stator junction box of this embodiment communicates with the first wind zone 220 and the second wind zone 230 of the wind generator 200 to send the cold wind of the wind generator 200 into the box body 100 of the stator junction box. The cold wind generated by the wind turbine 200 is used to circulate and cool the stator junction box, thereby reducing the temperature of the anti-twist cable inside the stator junction box, ensuring that the anti-twist cable can work normally, and improving the reliability of the anti-twist cable operation; this embodiment The stator junction box effectively uses the cold wind generated by the wind generator 200 itself, and uses the pressure difference inside the wind generator 200 to make the cold wind naturally enter from the air inlet 110 and move to the air outlet 120 after being discharged, without the need to introduce The other newly added cooling equipment has a simple structure and can produce an effective cooling effect, and at the same time, no additional cost is added due to the newly added cooling equipment, and the energy generated by the wind turbine 200 is recycled.
图3为本发明实施例一提供的一种风力发电机的结构示意图。如图3所示，第一风区220可以为风力发电机200的冷风区，第二风区230可以为风力发电机200的热风区。风力发电机200可以包括冷风区和热风区，第一风区220可以为冷风区，第二风区230可以为热风区，如此，冷风区和定子接线盒的进风口110连通，热风区和定子接线盒的出风口120连通，且冷风区的气压大于热风区的气压，冷风区的气压较高的冷风通过进风口110进入定子接线盒的盒体100内部，对盒体100进行冷却降温，经热交换之后的冷风的温度升高，再运动至出风口120被排出至风力发电机200的热风区。冷风区的冷风通过进风口110源源不断的进入盒体100，对盒体100进行冷却降温之后，再通过出风口120被排出至热风区，这样的循环往复过程实现了对定子接线盒的盒体100的循环冷却。作为一种可选的方式，具有冷风区和热风区的风力发电机200可以是某型号带顶驱风机的空空冷风力发电机200。3 is a schematic structural diagram of a wind power generator according to Embodiment 1 of the present invention. As shown in FIG. 3, the first wind zone 220 may be a cold wind zone of the wind turbine 200, and the second wind zone 230 may be a hot wind zone of the wind turbine 200. The wind turbine 200 may include a cold wind zone and a hot wind zone, the first wind zone 220 may be a cold wind zone, and the second wind zone 230 may be a hot wind zone. Thus, the cold wind zone and the air inlet 110 of the stator junction box are connected, and the hot wind zone and the stator The air outlet 120 of the junction box is connected, and the air pressure in the cold air zone is greater than the air pressure in the hot air zone. The cold air with a higher air pressure in the cold air zone enters the interior of the box 100 of the stator junction box through the air inlet 110, and cools the box 100. The temperature of the cold wind after the heat exchange increases, and then moves to the air outlet 120 to be discharged to the hot wind area of the wind turbine 200. The cold wind in the cold wind zone continuously enters the box 100 through the air inlet 110, cools and cools the box 100, and then is discharged to the hot air zone through the air outlet 120. This cyclic reciprocating process realizes the box of the stator junction box 100 circulation cooling. As an optional method, the wind generator 200 having a cold wind zone and a hot wind zone may be a certain type of air-cooled wind generator 200 with a top drive fan.
图4为本发明实施例一提供的另一种风力发电机的结构示意图。如图4所示，第一风区220可以为风力发电机200的冷风区，第二风区230可以为风力发电机200的次冷风区。风力发电机200可以包括冷风区和次冷风区，第一风区220可以为冷风区，第二风区230可以为次冷风区，如此，冷风区和定子接线盒的进风口110连通，次冷风区和定子接线盒的出风口120连通，且冷风区的气压大于次冷风区的气压，冷风区的气压较高的冷风通过进风口110进入定子接线盒的盒体100内部，对盒体100进行冷却降温，经热交换之后的冷风的温度升高，再运动至出风口120被排出至风力发电机200的次冷风区。冷风区的冷风通过进风口110源源不断的进入盒体100，对盒体100进行冷却降温之后，再通过出风口120被排出至次冷风区，这样的循环往复过程实现了对定子接线盒的盒体100的循环冷却。作为一种可选的方式，具有冷风区和次冷风区的风力发电机200可以是某型号带轴流风扇风机的空空冷风力发电机200。4 is a schematic structural diagram of another wind power generator according to Embodiment 1 of the present invention. As shown in FIG. 4, the first wind zone 220 may be a cold wind zone of the wind turbine 200, and the second wind zone 230 may be a sub-cold wind zone of the wind turbine 200. The wind turbine 200 may include a cold wind zone and a sub-cold wind zone, the first wind zone 220 may be a cold wind zone, and the second wind zone 230 may be a sub-cold wind zone. In this way, the cold wind zone and the air inlet 110 of the stator junction box are connected, and the secondary cold wind Zone and the air outlet 120 of the stator junction box are connected, and the air pressure in the cold wind zone is greater than the air pressure in the secondary cold zone. The cold air with a higher air pressure in the cold wind zone enters the box body 100 of the stator junction box through the air inlet 110, and the box body 100 is After cooling and cooling, the temperature of the cold wind after heat exchange increases, and then moves to the air outlet 120 to be discharged to the secondary cold wind area of the wind turbine 200. The cold wind in the cold wind zone continuously enters the box body 100 through the air inlet 110, cools and cools the box body 100, and then is discharged to the secondary cold air zone through the air outlet 120. This cyclic reciprocating process realizes the box of the stator junction box Circulation cooling of the body 100. As an optional manner, the wind generator 200 having a cold wind zone and a sub-cold wind zone may be a certain type of air-cooled wind generator 200 with an axial fan fan.
另外，风力发电机200可以是包括冷风区和热风区，还可以是包括冷风区和次冷风区，当然还可以是包括具有温度差的至少两个风区的其他结构形式，这取决于风力发电机200的具体类别及型号。本实施例的定子接线盒与风力发电机200的连接，仅需满足进风口110和风力发电机200的温度较低、 气压较大的风区连通，出风口120和风力发电机200的温度较高、气压较小的风区连通即可，能够确保温度低的冷风能够通过进风口110自然地流通至定子接线盒的盒体100内部，对盒体100进行冷却降温后，温度升高的冷风能够自然地运动至出风口120而被排出至风力发电机200的温度较高、气压较小的风区。In addition, the wind turbine 200 may include a cold wind zone and a hot wind zone, may also include a cold wind zone and a sub-cold wind zone, and of course may also be other structural forms including at least two wind zones with temperature differences, depending on the wind power generation The specific type and model of the machine 200. The connection between the stator junction box of this embodiment and the wind generator 200 only needs to satisfy the connection between the air inlet 110 and the wind zone of the wind generator 200 where the temperature is low and the air pressure is high, and the temperature of the air outlet 120 and the wind generator 200 is relatively high The wind zone with high and low air pressure can be connected to ensure that the cold air with low temperature can naturally flow through the air inlet 110 to the interior of the box 100 of the stator junction box. After the box 100 is cooled and cooled, the temperature increases. It can naturally move to the air outlet 120 and be discharged to the wind zone where the temperature of the wind generator 200 is high and the air pressure is low.
如图2所示，盒体100可以包括底板130，进风口110和出风口120设置在底板130上。定子接线盒的盒体100包括底板130，一般的底板130可以和风力发电机200的机座210外壁相对设置，也就是说，风力发电机200和定子接线盒的连接，可以是通过风力发电机200的机座210的外壁和定子接线盒的底板130进行连接，机座210外壁可以和盒体100的底板130平行。进风口110和出风口120也可以设置在底板130上，底板130和机座210相对设置，因此，底板130和机座210的距离相对较近，进风口110通过底板130和风力发电机200的第一风区220连通，出风口120通过底板130和风力发电机200的第二风区230连通，这种连通方式可保证冷却风的通路较容易实现，第一风区220的冷风可顺利通过设置在底板130上的进风口110进入盒体100内部，在盒体100内部循环之后的风也可通过设置在底板130上的出风口120顺利的被排出至第二风区230。As shown in FIG. 2, the box body 100 may include a bottom plate 130, and the air inlet 110 and the air outlet 120 are provided on the bottom plate 130. The box body 100 of the stator junction box includes a bottom plate 130, and the general bottom plate 130 may be disposed opposite to the outer wall of the base 210 of the wind turbine 200, that is, the connection between the wind turbine 200 and the stator junction box may be through the wind turbine The outer wall of the base 210 of 200 is connected to the bottom plate 130 of the stator junction box. The outer wall of the base 210 may be parallel to the bottom plate 130 of the box body 100. The air inlet 110 and the air outlet 120 may also be provided on the bottom plate 130, and the bottom plate 130 and the base 210 are relatively arranged. Therefore, the distance between the bottom plate 130 and the base 210 is relatively close, and the air inlet 110 passes through the bottom plate 130 and the wind generator 200 The first wind zone 220 is connected, and the air outlet 120 is connected to the second wind zone 230 of the wind turbine 200 through the bottom plate 130. This communication method can ensure that the cooling air passage is easier to realize, and the cold wind of the first wind zone 220 can pass smoothly The air inlet 110 provided on the bottom plate 130 enters the inside of the box 100, and the wind after circulating inside the box 100 can also be smoothly discharged to the second wind zone 230 through the air outlet 120 provided on the bottom plate 130.
另外，盒体100还可以包括侧板和盖板，盖板和底板130相对设置，侧板连接在盖板和底板130之间，盖板、底板130和侧板共同围成盒体100的封闭空间。冷却风通孔在盒体100的封闭空间内流通循环，以对盒体100进行循环冷却。另外，盖板和侧板之间可以形成可拆卸连接，以便于对盒体100内部的部件进行维护和更换。In addition, the box body 100 may further include a side plate and a cover plate. The cover plate and the bottom plate 130 are oppositely arranged. The side plate is connected between the cover plate and the bottom plate 130. The cover plate, the bottom plate 130, and the side plate together enclose the box body 100. space. The cooling air through-hole circulates and circulates in the closed space of the case 100 to circulate and cool the case 100. In addition, a detachable connection can be formed between the cover plate and the side plate, so as to facilitate maintenance and replacement of components inside the box body 100.
为了确保第一风区220气压相对较高的冷风能顺利通过进风口110进入盒体100内部，并且在盒体100内部循环之后的风能顺利通过出风口120被排出至第二风区230，如图2所示，定子接线盒还可以包括第一导风管300和第二导风管400；第一导风管300的第一端位于第一风区220，第一导风管300的第二端穿过进风口110并伸入盒体100内部；第二导风管400的第一端位于第二风区230，第二导风管400的第二端穿过出风口120并伸入盒体100内部。In order to ensure that the relatively high pressure cold air in the first wind zone 220 can smoothly enter the interior of the box 100 through the air inlet 110, and the wind energy after circulating inside the box 100 is smoothly discharged through the air outlet 120 to the second wind zone 230, such as As shown in FIG. 2, the stator junction box may further include a first air duct 300 and a second air duct 400; the first end of the first air duct 300 is located in the first wind zone 220, and the first end of the first air duct 300 The two ends pass through the air inlet 110 and extend into the box 100; the first end of the second air duct 400 is located in the second wind zone 230, and the second end of the second air duct 400 passes through the air outlet 120 and extends into Inside the box 100.
本实施例中，进风口110通过第一导风管300和风力发电机200的第一 风区220连通，出风口120通过第二导风管400和风力发电机200的第二风区230连通，也就是说，第一风区220的气压较高的冷风首先是进入第一导风管300，在第一导风管300内运动至定子接线盒的进风口110，通过进风口110进入盒体100内部；冷风在盒体100内部和盒体100发生热交换，带走盒体100的部分热量，冷风的温度升高。温度升高之后的冷风运动至盒体100的底板130上设置的出风口120，从出风口120被排出后通过第二导风管400进入风力发电机200的温度较高、气压较低的第二风区230。In this embodiment, the air inlet 110 communicates with the first wind zone 220 of the wind generator 200 through the first air duct 300, and the air outlet 120 communicates with the second wind zone 230 of the wind generator 200 through the second air duct 400 That is to say, the cold air with higher air pressure in the first wind zone 220 first enters the first air duct 300, and moves in the first air duct 300 to the air inlet 110 of the stator junction box, and enters the box through the air inlet 110 Inside the body 100; the cold wind exchanges heat with the box 100 inside the box 100, taking away part of the heat from the box 100, and the temperature of the cold wind rises. After the temperature rises, the cold wind moves to the air outlet 120 provided on the bottom plate 130 of the box 100, and is discharged from the air outlet 120 and enters the wind turbine 200 through the second air duct 400. The temperature is higher and the air pressure is lower. Erfeng District 230.
至于第一风区220的气压大于第二风区230的气压，可以通过有限元分析的方法确定风力发电机200内部的压力分布情况，根据风力发电机200内部的压力差，将第一导风管300的第一端设置在风力发电机200的冷风区，也就是第一风区220的气压较高的部位；将第二导风管400的第一端设置在风力发电机200的热风区或次冷风区，也就是第二风区230的气压较低的部位。这样通过高气压区至低气压区，使风力发电机200内的第一风区220的冷风自然的运动至定子接线盒的进风口110，热交换之后，温度升高的热风自然地运动至出风口120并进入第二风区230。As for the air pressure in the first wind zone 220 is greater than the air pressure in the second wind zone 230, the pressure distribution inside the wind turbine 200 can be determined by finite element analysis, and the first wind can be guided according to the pressure difference inside the wind turbine 200 The first end of the tube 300 is located in the cold wind zone of the wind generator 200, that is, the portion of the first wind zone 220 where the air pressure is high; the first end of the second air duct 400 is located in the hot wind zone of the wind generator 200 Or a sub-cold wind zone, that is, a part of the second wind zone 230 where the air pressure is low. In this way, through the high-pressure zone to the low-pressure zone, the cold wind of the first wind zone 220 in the wind turbine 200 naturally moves to the air inlet 110 of the stator junction box. After the heat exchange, the hot wind with increased temperature naturally moves to the out The tuyere 120 also enters the second wind zone 230.
另外，为了便于风在第一导风管300和第二导风管400中运动，并且从节约成本的角度出发，第一导风管300和第二导风管400可以是塑料管或橡胶管，塑料管或橡胶管的柔性较好、弹性大，可以是风在导管内的运动更自如灵活，使冷风能够顺利的通过第一导风管300进入盒体100内部，并将和盒体100热交换之后的风通过第二导风管400顺利的排出至风力发电机200。In addition, in order to facilitate the movement of wind in the first air duct 300 and the second air duct 400, and from the perspective of cost saving, the first air duct 300 and the second air duct 400 may be plastic tubes or rubber tubes The plastic tube or rubber tube has better flexibility and greater elasticity, which can make the movement of the wind in the duct more flexible, so that the cold wind can smoothly enter the inside of the box 100 through the first air duct 300, and the box 100 The wind after the heat exchange is smoothly discharged to the wind generator 200 through the second air duct 400.
进一步的，第一导风管300的第二端可以位于底板130下部，第二导风管400的第二端可以位于底板130上部。第一导风管300的第二端位于盒体100的进风口110处，第二导风管400的第二端位于盒体100的出风口120处，在盒体100内部，对盒体100进行冷却降温的冷风由进风口110处运动至出风口120处，实现对盒体100的循环冷却。一般的，进风口110处的风的温度较低、气压较强，出风口120处的风的温度较高、气压较弱，而一般情况下，气压较高的冷风总是从低处运动至高处，冷风吸热后，成为高处的温度较高、气压较低的热风。Further, the second end of the first air duct 300 may be located at the bottom of the bottom plate 130, and the second end of the second air duct 400 may be located at the top of the bottom plate 130. The second end of the first air duct 300 is located at the air inlet 110 of the box 100, and the second end of the second air duct 400 is located at the air outlet 120 of the box 100. Inside the box 100, the box 100 The cooling air that cools and lowers the temperature moves from the air inlet 110 to the air outlet 120 to achieve circulating cooling of the box 100. Generally, the wind at the air inlet 110 has a lower temperature and stronger air pressure, and the wind at the air outlet 120 has a higher temperature and weaker air pressure. In general, the cold air with higher air pressure always moves from low to high At the place, after the cold wind absorbs heat, it becomes a hot wind with higher temperature and lower air pressure in the high place.
因此，如图2所示，可以将进风口110设置在底板130下部，出风口120设置在底板130上部，温度较低、气压较高的冷风从底板130下部的进风口 110进入，和盒体100进行热交换，热交换之后的风温度升高成为热风，温度较高、气压较低的热风自然的运动至底板130上部的出风口120，从出风口120排出至风力发电机200。与之相对应的，位于盒体100的进风口110处的第一导风管300的第二端位于底板130下部，位于盒体100的出风口120处的第二导风管400的第二端位于底板130上部。Therefore, as shown in FIG. 2, the air inlet 110 may be provided at the lower portion of the bottom plate 130 and the air outlet 120 may be provided at the upper portion of the bottom plate 130. The cold air with lower temperature and higher air pressure enters from the air inlet 110 at the bottom of the bottom plate 130 and the box 100 performs heat exchange, and the temperature of the wind after the heat exchange rises into hot air. The hot air with higher temperature and lower air pressure naturally moves to the air outlet 120 at the upper part of the bottom plate 130, and is discharged from the air outlet 120 to the wind generator 200. Correspondingly, the second end of the first air duct 300 located at the air inlet 110 of the box 100 is located at the lower portion of the bottom plate 130, and the second end of the second air duct 400 located at the air outlet 120 of the box 100 The end is located above the bottom plate 130.
为了实现定子接线盒与风力发电机200的连接，盒体100和风力发电机200的机座210之间可以设置有至少一个连接块500，盒体100和机座210通过连接块500连接，连接块500在垂直于盒体100和机座210连接方向上的截面面积小于盒体100在该方向上的截面积。In order to realize the connection between the stator junction box and the wind generator 200, at least one connection block 500 may be provided between the box body 100 and the frame 210 of the wind generator 200, and the box body 100 and the frame 210 are connected and connected by the connection block 500 The cross-sectional area of the block 500 in the direction perpendicular to the connecting direction of the box body 100 and the base 210 is smaller than the cross-sectional area of the box body 100 in this direction.
图5为本发明实施例一提供的风力发电机上的连接块的结构示意图。如图5所示，本实施例的定子接线盒不是直接连接在风力发电机200的机座210外壁上，而是通过连接块500实现定子接线盒的盒体100和风力发电机200的机座210的连接。具体的，定子接线盒的盒体100的底板130和风力发电机200的机座210外壁相对设置，连接块500可以设置在盒体100的底板130和机座210外壁之间，通过连接块500连接底板130和机座210外壁，以实现定子接线盒和风力发电机200的连接。FIG. 5 is a schematic structural diagram of a connection block on a wind turbine provided by Embodiment 1 of the present invention. As shown in FIG. 5, the stator junction box of this embodiment is not directly connected to the outer wall of the base 210 of the wind generator 200, but the box body 100 of the stator junction box and the base of the wind generator 200 are realized through the connection block 500 210 connection. Specifically, the bottom plate 130 of the box body 100 of the stator junction box and the outer wall of the base 210 of the wind turbine 200 are disposed oppositely, and the connecting block 500 may be provided between the bottom plate 130 of the box body 100 and the outer wall of the base 210 through the connecting block 500 The bottom plate 130 and the outer wall of the machine base 210 are connected to realize the connection between the stator junction box and the wind generator 200.
与现有的定子接线盒直接连接在风力发电机的机座210外壁上相比，本实施例在定子接线盒和风力发电机200之间设置连接块500，定子接线盒的盒体100和风力发电机200的机座210采用隔离设置的方式，使定子接线盒和风力发电机200之间具有一定的间隙，可避免风力发电机200内部的热量直接传导至定子接线盒内，通过中间的间隙可使得风力发电机200的大部分热量散发至周围的空间中。连接块500这种连接方式，可有效减少风力发电机200传导至定子接线盒的热量，进而避免了定子接线盒的过度升温，也可进一步降低定子接线盒内的抗扭转电缆的工作温度，确保风力发电机200运行的稳定性。Compared with the existing stator junction box directly connected to the outer wall of the base 210 of the wind generator, in this embodiment, a connection block 500 is provided between the stator junction box and the wind generator 200, the box body 100 of the stator junction box and the wind power The base 210 of the generator 200 adopts an isolated arrangement, so that there is a certain gap between the stator junction box and the wind generator 200, which can prevent the heat inside the wind generator 200 from being directly transmitted into the stator junction box through the gap in the middle Most of the heat of the wind turbine 200 can be dissipated into the surrounding space. The connection block 500 can effectively reduce the heat conducted by the wind turbine 200 to the stator junction box, thereby avoiding excessive heating of the stator junction box, and further reducing the working temperature of the anti-twist cable in the stator junction box to ensure The stability of the operation of the wind turbine 200.
具体的，可以在连接块500的垂直于盒体100底板130和机座210外壁的方向上设置螺纹通孔，盒体100底板130和机座210外壁的相应位置也设置通孔，螺纹孔及通孔中设置螺栓，通过螺栓实现定子接线盒、连接块500及风力发电机200的固定连接。Specifically, a threaded through hole may be provided in the direction of the connecting block 500 perpendicular to the bottom wall 130 of the box 100 and the outer wall of the base 210. The corresponding positions of the bottom wall 130 of the box 100 and the outer wall of the base 210 are also provided with through holes, threaded holes and Bolts are provided in the through holes, and the fixed connection of the stator junction box, the connection block 500 and the wind generator 200 is achieved through the bolts.
另外，连接块500在垂直于盒体100和机座210连接方向上的截面面积 小于盒体100在该方向上的截面面积，也就是说，对于连接块500和盒体100相接触的两者的表面，连接块500的表面的面积小于盒体100的表面的面积，这样的话，盒体100的部分表面会暴露于外界而不是全部被连接块500遮挡，这就减少了风力发电机200通过连接块500传导至定子接线盒的热量，进而降低了定子接线盒的温度，这有利于定子接线盒的散热。In addition, the cross-sectional area of the connecting block 500 in the direction perpendicular to the connecting direction of the box body 100 and the base 210 is smaller than the cross-sectional area of the box body 100 in that direction, that is, for both the connecting block 500 and the box body 100 contacting The surface of the connecting block 500 is smaller than the surface of the box 100. In this case, part of the surface of the box 100 will be exposed to the outside instead of being completely blocked by the connecting block 500, which reduces the wind turbine 200 passing The connection block 500 conducts heat to the stator junction box, thereby reducing the temperature of the stator junction box, which is beneficial to the heat dissipation of the stator junction box.
进一步的，连接块500在沿盒体100和机座210连接方向上的厚度为20-30毫米。连接块500的厚度为20-30毫米，也就是说盒体100和机座210之间具有20-30毫米的间隙，这可以避免风力发电机200内部的热量直接传导至定子接线盒内，通过此间隙使风力发电机200的热量散发至周围的空间内。并且，在此厚度的范围内可以将连接块500的体积设置的较小，即能保证通过连接块500能够使定子接线盒和风力发电机200连接牢固，若连接块500的厚度过大，则需要相应增大连接块500的长度和宽度，否则，可能导致连接块500在厚度方向上出现裂缝甚至断裂，盒体100和机座210之间连接的稳定性无法得到保障。具体的，连接块500的厚度可以为20毫米、22毫米、24毫米、26毫米、28毫米或30毫米等，本实施例不作具体限制。Further, the thickness of the connecting block 500 in the connecting direction of the box body 100 and the base 210 is 20-30 mm. The thickness of the connection block 500 is 20-30 mm, that is to say, there is a gap of 20-30 mm between the box body 100 and the base 210, which can prevent the heat inside the wind generator 200 from being directly transmitted into the stator junction box, through This gap dissipates the heat of the wind turbine 200 into the surrounding space. In addition, within this thickness range, the volume of the connection block 500 can be set to be small, that is, the connection between the stator junction box and the wind turbine 200 can be ensured through the connection block 500. The length and width of the connection block 500 need to be increased accordingly, otherwise, the connection block 500 may be cracked or even broken in the thickness direction, and the stability of the connection between the box body 100 and the base 210 cannot be guaranteed. Specifically, the thickness of the connecting block 500 may be 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, or 30 mm, etc., and this embodiment is not specifically limited.
另外，盒体100内部还设置有电缆和铜排。电缆即是如前所述的抗扭转电缆，通过此电缆和铜排将风力发电机200产生的电能进行输出。In addition, cables and copper bars are also provided inside the box 100. The cable is the anti-twist cable as described above, and the electrical energy generated by the wind turbine 200 is output through the cable and the copper bar.
实施例二Example 2
本实施例提供一种风力发电机200，风力发电机200包括如实施例一所述的定子接线盒。通过定子接线盒内部设置的电缆和铜排将风力发电机200产生的电能进行输出。This embodiment provides a wind turbine 200. The wind turbine 200 includes the stator junction box as described in the first embodiment. The electrical energy generated by the wind turbine 200 is output through the cables and copper bars provided inside the stator junction box.
具体的，定子接线盒包括盒体100，盒体100和风力发电机200的机座210连接；盒体100形成中空腔体，盒体100具有进风口110和出风口120，进风口110和风力发电机200的第一风区220连通，出风口120和风力发电机200的第二风区230连通，盒体100在第一风区220和第二风区230之间形成冷却风通路，以对盒体100进行循环冷却，其中，第一风区220的气压大于第二风区230的气压。Specifically, the stator junction box includes a box body 100, which is connected to the base 210 of the wind turbine 200; the box body 100 forms a hollow cavity, and the box body 100 has an air inlet 110 and an air outlet 120, and the air inlet 110 and wind power The first wind zone 220 of the generator 200 communicates, the air outlet 120 communicates with the second wind zone 230 of the wind generator 200, and the box 100 forms a cooling air path between the first wind zone 220 and the second wind zone 230, The box body 100 is circulated and cooled, wherein the air pressure in the first wind zone 220 is greater than the air pressure in the second wind zone 230.
盒体100为定子接线盒的主体结构，盒体100可以包括底板130、侧板和盖板，盖板和底板130相对设置，侧板连接在盖板和底板130之间，盖板、 底板130和侧板共同围成盒体100的封闭空间。其中，底板130和风力发电机200的机座210相对设置，底板130上设置有进风口110和出风口120，还可以包括第一导风管300和第二导风管400，进风口110通过第一导风管300和风力发电机200的第一风区220连通，出风口120通过第二导风管400和风力发电机200的第二风区230连通。The box body 100 is the main structure of the stator junction box. The box body 100 may include a bottom plate 130, side plates, and a cover plate. The cover plate and the bottom plate 130 are oppositely arranged. The side plates are connected between the cover plate and the bottom plate 130. The cover plate and the bottom plate 130 Together with the side panel, an enclosed space of the box body 100 is enclosed. Among them, the bottom plate 130 and the base 210 of the wind turbine 200 are oppositely arranged, the bottom plate 130 is provided with an air inlet 110 and an air outlet 120, and may further include a first air duct 300 and a second air duct 400, the air inlet 110 passes The first air duct 300 communicates with the first wind zone 220 of the wind turbine 200, and the air outlet 120 communicates with the second wind zone 230 of the wind turbine 200 through the second wind duct 400.
风力发电机200的第一风区220的气压大于第二风区230的气压，第一风区220可以为风力发电机200的冷风区，第二风区230可以为风力发电机200的热风区或次冷风区。温度较低、气压较高的冷风从第一风区220通过第一导风管300及盒体100的进风口110进入盒体100内部，和盒体100发生热交换，对盒体100进行冷却降温，热交换之后的冷风的温度的温度升高成为热风，热风运动至盒体100的出风口120，通过和出风口120连通的第二导风管400被排出至风力发电机200的第二风区230。如此，不用在定子接线盒内新增冷却设备，仅利用风力发电机200内部的冷风及风压差对接线盒进行冷却，在合适的部位设置第一导风管300和第二导风管400即可，结构简单，冷却效果好，且无新增设备没有别的成本支出，经济实用。可对定子接线盒进行循环冷却，以提升定子接线盒的散热效果，确保定子接线盒内部的抗扭转电缆得到有效散热，从而提高风力发电机200运行的可靠性。The air pressure of the first wind zone 220 of the wind turbine 200 is greater than that of the second wind zone 230. The first wind zone 220 may be the cold wind zone of the wind generator 200, and the second wind zone 230 may be the hot wind zone of the wind generator 200 Or sub-cold wind zone. The cold wind with lower temperature and higher air pressure enters the interior of the box 100 from the first wind zone 220 through the first air duct 300 and the air inlet 110 of the box 100, and exchanges heat with the box 100 to cool the box 100 After the temperature is lowered, the temperature of the cold wind after the heat exchange rises into hot air, and the hot wind moves to the air outlet 120 of the box 100, and is discharged to the second wind turbine 200 through the second air duct 400 communicating with the air outlet 120 Wind zone 230. In this way, without adding a cooling device in the stator junction box, only the cold wind and the wind pressure difference inside the wind generator 200 are used to cool the junction box, and the first air guide tube 300 and the second air guide tube 400 are provided at appropriate locations That is, the structure is simple, the cooling effect is good, and there is no additional cost without additional equipment, which is economical and practical. The stator junction box can be cyclically cooled to improve the heat dissipation effect of the stator junction box, ensure that the anti-twist cable inside the stator junction box is effectively dissipated, and thus improve the reliability of the wind generator 200 operation.
另外，在定子接线盒的底板130和风力发电机200的机座210之间可以设置连接块500，通过连接块500实现定子接线盒和风力发电机200的连接，将定子接线盒的厚度控制在合适的范围内，是定子接线盒的底板130和风力发电机200的机座210之间形成间隙，较少风力发电机200和定子接线盒之间的热传导，降低定子接线盒自身的温度。In addition, a connection block 500 may be provided between the bottom plate 130 of the stator junction box and the base 210 of the wind turbine generator 200, and the connection between the stator junction box and the wind turbine generator 200 may be achieved through the connection block 500 to control the thickness of the stator junction box at Within a suitable range, a gap is formed between the bottom plate 130 of the stator junction box and the base 210 of the wind generator 200, which reduces heat conduction between the wind generator 200 and the stator junction box, and reduces the temperature of the stator junction box itself.
本发明提供的定子接线盒及风力发电机，定子接线盒应用于风力发电机，包括盒体，盒体和风力发电机的机座连接；盒体形成中空腔体，盒体具有进风口和出风口，进风口和风力发电机的第一风区连通，出风口和风力发电机的第二风区连通，盒体在第一风区和第二风区之间形成冷却风通路，以对盒体进行循环冷却，其中，第一风区的气压大于第二风区的气压。通过在盒体内设置进风口和出风口，进风口和出风口分别和风力发电机的第一风区和第二风区连通，第一风区的气压大于第二风 区的气压，风力发电机的冷风从进风口进入盒体内部，对盒体进行冷却后，再从出风口排出，这样在盒体内形成冷却风通路，可对定子接线盒进行循环冷却，以确保定子接线盒内的抗扭转电缆得到有效散热，进而确保了风力发电机的可靠运行。The invention provides a stator junction box and a wind generator. The stator junction box is applied to a wind generator and includes a box body, which is connected to the base of the wind generator; the box body forms a hollow cavity, and the box body has an air inlet and an outlet The air inlet, the air inlet are connected to the first wind zone of the wind generator, the air outlet is connected to the second wind zone of the wind generator, and the box body forms a cooling air path between the first wind zone and the second wind zone The body is circulated and cooled, wherein the air pressure in the first wind zone is greater than the air pressure in the second wind zone. By providing an air inlet and an air outlet in the box body, the air inlet and the air outlet are respectively connected to the first wind zone and the second wind zone of the wind generator, and the air pressure in the first wind zone is greater than that in the second wind zone. The cold air enters the box body from the air inlet, cools the box, and then discharges from the air outlet. This forms a cooling air path in the box, which can circulate the stator junction box to ensure the anti-rotation in the stator junction box The cable is effectively dissipated, which in turn ensures the reliable operation of the wind turbine.
在本发明的描述中，需要理解的是，本文中使用的术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、***、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。In the description of the present invention, it should be understood that the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process that includes a series of steps or units, A method, system, product, or device need not be limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or equipment.
除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等应做广义理解，例如可以是固定连接，也可以是可拆卸连接，或成为一体；可以是直接相连，也可以通过中间媒介间接相连，可以使两个元件内部的相连或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。Unless otherwise specified and limited, the terms "installation", "connected", "connected", "fixed", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or be integrated; it can be Direct connection, or indirect connection through an intermediary, can make the connection between the two components or the interaction between the two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations. In addition, the terms "first", "second", etc. are for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or replacements do not deviate from the essence of the corresponding technical solutions of the technical solutions of the embodiments of the present invention range.

Claims (10)

  1. 一种定子接线盒，应用于风力发电机，其特征在于，包括盒体，所述盒体和所述风力发电机的机座连接；所述盒体形成中空腔体，所述盒体具有进风口和出风口，所述进风口和所述风力发电机的第一风区连通，所述出风口和所述风力发电机的第二风区连通，所述盒体在所述第一风区和所述第二风区之间形成冷却风通路，以对所述盒体进行循环冷却，其中，所述第一风区的气压大于所述第二风区的气压。A stator junction box applied to a wind generator is characterized in that it includes a box body, and the box body is connected to a base of the wind generator; the box body forms a hollow cavity, and the box body has an inlet An air outlet and an air outlet, the air inlet is in communication with the first wind zone of the wind generator, the air outlet is in communication with the second wind zone of the wind generator, and the box is in the first wind zone A cooling air passage is formed between the second wind zone and the box body for circulating cooling, wherein the air pressure in the first wind zone is greater than the air pressure in the second wind zone.
  2. 根据权利要求1所述的定子接线盒，其特征在于，所述第一风区为所述风力发电机的冷风区，所述第二风区为所述风力发电机的热风区。The stator junction box according to claim 1, wherein the first wind zone is a cold wind zone of the wind generator, and the second wind zone is a hot wind zone of the wind generator.
  3. 根据权利要求1所述的定子接线盒，其特征在于，所述第一风区为所述风力发电机的冷风区，所述第二风区为所述风力发电机的次冷风区。The stator junction box according to claim 1, wherein the first wind zone is a cold wind zone of the wind turbine, and the second wind zone is a secondary cold wind zone of the wind turbine.
  4. 根据权利要求1-3任一项所述的定子接线盒，其特征在于，所述盒体包括底板，所述进风口和所述出风口设置在所述底板上。The stator junction box according to any one of claims 1 to 3, wherein the box body includes a bottom plate, and the air inlet and the air outlet are provided on the bottom plate.
  5. 根据权利要求4所述的定子接线盒，其特征在于，还包括第一导风管和第二导风管；The stator junction box according to claim 4, further comprising a first air duct and a second air duct;
    所述第一导风管的第一端位于所述第一风区，所述第一导风管的第二端穿过所述进风口并伸入所述盒体内部；所述第二导风管的第一端位于所述第二风区，所述第二导风管的第二端穿过所述出风口并伸入所述盒体内部。The first end of the first air duct is located in the first wind zone, and the second end of the first air duct passes through the air inlet and extends into the box; the second air duct The first end of the air duct is located in the second wind zone, and the second end of the second air duct passes through the air outlet and extends into the box body.
  6. 根据权利要求5所述的定子接线盒，其特征在于，所述第一导风管的第二端位于所述底板下部，所述第二导风管的第二端位于所述底板上部。The stator junction box according to claim 5, wherein the second end of the first air duct is located at the lower portion of the bottom plate, and the second end of the second air duct is located at the upper portion of the bottom plate.
  7. 根据权利要求1-3任一项所述的定子接线盒，其特征在于，所述盒体和所述风力发电机的机座之间设置有至少一个连接块，所述盒体和所述机座通过所述连接块连接，所述连接块在垂直于所述盒体和所述机座连接方向上的截面面积小于所述盒体在该方向上的截面面积。The stator junction box according to any one of claims 1 to 3, wherein at least one connection block is provided between the box body and the base of the wind turbine, and the box body and the machine The seats are connected by the connecting block, and the cross-sectional area of the connecting block in a direction perpendicular to the connecting direction of the box body and the machine base is smaller than the cross-sectional area of the box body in the direction.
  8. 根据权利要求7所述的定子接线盒，其特征在于，所述连接块在沿所述盒体和所述机座连接方向上的厚度为20-30毫米。The stator junction box according to claim 7, wherein the thickness of the connection block in the connection direction of the box body and the base is 20-30 mm.
  9. 根据权利要求1-3任一项所述的定子接线盒，其特征在于，所述盒体内部设置有电缆和铜排。The stator junction box according to any one of claims 1 to 3, wherein a cable and a copper bar are provided inside the box body.
  10. 一种风力发电机，其特征在于，包括权利要求1-9任一项所述的定子接线盒。A wind power generator, characterized by comprising the stator junction box according to any one of claims 1-9.
PCT/CN2018/117756 2018-11-19 2018-11-27 Stator junction box and wind turbine WO2020103172A1 (en)

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CN201811375354.9A CN111200336A (en) 2018-11-19 2018-11-19 Stator junction box and wind driven generator

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JPH11341743A (en) * 1998-05-27 1999-12-10 Hitachi Ltd Dynamo-electric machine
CN201461379U (en) * 2009-05-11 2010-05-12 澧县劲龙电机厂 Internal fan blade air duct heat dissipating device of electric pump
CN201557020U (en) * 2009-11-23 2010-08-18 永济新时速电机电器有限责任公司 1.5MW offshore air-to-air cooling doubly-fed induction wind turbine
CN202142950U (en) * 2011-04-11 2012-02-08 东元电机股份有限公司 Motor and box body of junction box thereof
CN103765732A (en) * 2011-08-29 2014-04-30 格伦德福斯管理联合股份公司 Electric motor

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CN201113633Y (en) * 2007-07-31 2008-09-10 台湾工机厂股份有限公司 Motor wiring box
CN202840821U (en) * 2012-09-17 2013-03-27 无锡航天万源新大力电机有限公司 Air-out structure on leeward side of high-capacity direct-driven wind turbine generator
CN106533098A (en) * 2016-11-30 2017-03-22 中车永济电机有限公司 Variable frequency speed regulation asynchronous motor with mechanical brake device for top drive

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11341743A (en) * 1998-05-27 1999-12-10 Hitachi Ltd Dynamo-electric machine
CN201461379U (en) * 2009-05-11 2010-05-12 澧县劲龙电机厂 Internal fan blade air duct heat dissipating device of electric pump
CN201557020U (en) * 2009-11-23 2010-08-18 永济新时速电机电器有限责任公司 1.5MW offshore air-to-air cooling doubly-fed induction wind turbine
CN202142950U (en) * 2011-04-11 2012-02-08 东元电机股份有限公司 Motor and box body of junction box thereof
CN103765732A (en) * 2011-08-29 2014-04-30 格伦德福斯管理联合股份公司 Electric motor

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