• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    3-point supporting system of wind turbine drivetrain comprising main bearing, main shaft, 5 gearbox with torque arms mounted to a main frame, characterised in that each torque arm further comprises a head with at least a first surface and a second surface being substantially parallel and configured to be substantially parallel with a plane containing the centre axis of the main shaft, the system further comprising a substantially U-shaped channel member being configured for containing the head and at least one pressing plate arranged at the open side of the U-shaped channel member for fastening the head in the U-shaped channel member, where the U-shaped channel member is configured for mounting at the main frame, whereby the problems of oil leakage caused by this regional bending deformation and also potential bolt joint failure are solved.
    公开号:DK201770008A1
    申请号:DKP201770008
    申请日:2017-01-06
    公开日:2018-08-10
    发明作者:Varming Rebsdorf Anders
    申请人:Envision Energy (Denmark) Aps；
    IPC主号:
    专利说明:

    (19) DANMARK (1°) DK 2017 70008 A1
    (12)
    PATENTANSØGNING
    Patent- og Varemærkestyrelsen
    Int.CI.: F16H 57/025 (2012.01) F03D 80/80 (2016.01)
    Ansøgningsnummer: PA 2017 70008
    Indleveringsdato: 2017-01 -06
    Løbedag: 2017-01-06
    Aim. tilgængelig: 2018-07-07
    Publiceringsdato: 2018-08-10
    Ansøger:
    ENVISION ENERGY (DENMARK) ApS, Randersvej 2A, 8600 Silkeborg, Danmark
    Opfinder:
    Anders Vanning Rebsdorf, Agerhønebakken 5, 8660 Skanderborg, Danmark
    Fuldmægtig:
    Patrade A/S, Ceresbyen 75, 8000 Århus C, Danmark
    Titel: 3-point supporting system of wind turbine drivetrain
    Fremdragne publikationer:
    EP2495433
    US2016305532
    Sammendrag:
    3-point supporting system of wind turbine drivetrain comprising main bearing, main shaft, 5 gearbox with torque arms mounted to a main frame, characterised in that each torque arm further comprises a head with at least a first surface and a second surface being substantially parallel and configured to be substantially parallel with a plane containing the centre axis of the main shaft, the system further comprising a substantially U-shaped channel member being configured for containing the head and at least one pressing plate arranged at the open side of the U-shaped channel member for fastening the head in the U-shaped channel member, where the U-shaped channel member is configured for mounting at the main frame, whereby the problems of oil leakage caused by this regional bending deformation and also potential bolt joint failure are solved.
    Fortsættes...
    DK 2017 70008 A1
    DK 2017 70008 A1 i
    3-point supporting system of wind turbine drivetrain
    Field of the Invention
    The present invention relates to a 3-point supporting system of wind turbine drivetrain comprising main bearing, main shaft, and gearbox with torque arms mounted to a main frame.
    Background of the Invention
    Before the development of the present invention, it was known to have a 3-point supporting system of wind turbine drivetrain, where the gearbox was mounted to the main frame through 2 pin shafts fixed to the torque arm. However, the span of each pin shaft could cause regional bending deformation on the torque arm when the wind turbine gearbox swung literally, and this regional bending deformation could cause failure of the connection between the torque arm and the ring gear to which it was attached to as well as oil leakages. Oil leakages as well as bolt joint failures are the bottlenecks when it comes to using shorter drivetrain.
    Such a system requires force fit connections with extremely narrow tolerance zones between the pin shaft and its support, where rubber bushings must encircle the pin shaft to be able to accommodate the forces due to e.g. wind shear and hence to reduce regional bending deformation etc. However, the largest impact on the bushings will be on the part of the bushings below the pin shaft and therefore there is also a risk for slackness.
    From EP2495433A1 it is also known to have a wind turbine comprising a gearbox having a square head torque arm, but it’s for a drive configuration without a moment bearing.
    Object of the Invention
    The object of this invention is therefore to provide a 3-point supporting system of wind turbine drivetrain of the type mentioned in the introduction which uses square heads on the torque arm to mount the gearbox instead of using pin shafts.
    DK 2017 70008 A1
    This will reduce regional bending deformation at the torque arms and thus reduce the failure of its connections, thus solving the problems of oil leakage caused by this regional bending deformation and also potential bolt joint failure.
    It is a further object of the invention, as a consequence of the reduction of the regional bending due to span, to make it possible to use shortened 3-point supporting drivetrain system.
    Description of the Invention
    According to a first aspect of the invention, the above-mentioned object is achieved with a 3-point supporting system of wind turbine drivetrain of the type mentioned in the introduction, the 3-point supporting system of wind turbine drivetrain comprising main bearing, main shaft, gearbox with torque arms mounted to a main frame, where each torque arm further comprises a head with at least a first surface and a second surface being substantially parallel and configured to be substantially parallel with a plane containing the centre axis of the main shaft, the system further comprising a substantially U-shaped channel member being configured for containing the head and at least one pressing plate arranged at the open side of the U-shaped channel member for fastening the head in the U-shaped channel member, where the U-shaped channel member is configured for mounting at the main frame.
    This makes it possible to construct a system which will not be as sensitive towards problems like oil leakages or bolt joint failures caused by e.g. wind shear. This is made possible due to the torque arm head comprising at least a first surface and a second surface which, due to their surface area, are able to absorb a larger surface pressure and, thereby, reduce the bending deformation at the torque arm as well as the torque arm ring-gear joint compared to prior art.
    The U-shaped channel member and the pressing plate arranged at the open side of the U-shaped channel member makes it possible to fasten the head, where the U-shaped channel member is configured for mounting at the main frame. Mounting of the head in the U-shaped channel member will make the surface of the torque arm head able to absorb the largest torque and pressure from the rotor. It is further possible to prestress the torque arm head.
    DK 2017 70008 A1
    The torque arm head is preferably solid, with no cavities, holes, or other constructional weaknesses within.
    Compared to prior arts pin shaft solutions which had a need for force fit connections with extremely narrow tolerance zones, the claimed invention is far less demanding, and not only when it comes to tolerances, but it is also easier to erect and to maintain afterwards and it is not as complicated to manufacture which makes it cheaper.
    In a second aspect, the present invention also relates to a 3-point supporting system where the head is substantially rectangular in cross section perpendicular at the first surface and the second surface.
    This makes it possible to make a head with at least a first surface and a second surface being substantially parallel, where the surfaces, configured to be substantially parallel with a plane containing the centre axis of the main shaft, are in fact larger than the distance between them. This is important due to the fact that it is the surface area which is able to absorb the surface pressure, and not the distance between the surfaces. The head is preferably wider than it is thick.
    However, it is possible to make a head with at least a first surface and a second surface being substantially parallel, where the surfaces, configured to be substantially parallel with a plane containing the centre axis of the main shaft, are in fact the same as regards the distance between them which makes the head square in cross section. That means the head is as wide as it is thick.
    In a third aspect, the present invention also relates to a 3-point supporting system where the first surface and the second surface are substantially flat and substantially rectangular.
    This makes it possible to make the head of the torque arm wider than it is long; wider in the upwind-downwind direction of the drivetrain. This is important due to the fact that it is the surface area which is able to absorb the surface pressure, and a short and wider torque arm is not as sensitive as a long and narrow torque arm.
    DK 2017 70008 A1
    However, it is possible to make the first surface and the second surface square, but other shapes are possible as well, like square surfaces with rounded corners.
    Very important though, no matter the surface form, is to make sure that the surfaces are flat and parallel.
    In a fourth aspect, the present invention also relates to a 3-point supporting system where the U-shaped channel member further comprises a lateral pressing plate.
    This makes it possible to contain and fasten the torque arm head in the U-shaped channel member and to absorb sideways movements due to e.g. wind shear.
    In a fifth aspect, the present invention also relates to a 3-point supporting system where at least a shim is located between at least the first surface and the U-shaped channel member and between the second surface and the U-shaped channel member .
    This makes it possible to vary shim properties due to e.g. wind shear, where the shims could possibly deviate in hardness, resilience/elasticity, compression, abrasion, and even their thickness may deviate.
    In a sixth aspect, the present invention also relates to a 3-point supporting system where the head further comprises a free end, where at least a shim is located between the free end and the lateral pressing plate.
    This makes it possible to obtain sideways movements due to wind shear and without damaging the free end of the torque arm head. Regarding the properties of the shim, the same conditions apply as mentioned with the other applied shims.
    In a seventh aspect, the present invention also relates to a 3-point supporting system where the shims comprise a rubber material.
    This makes it possible to choose between a large variety of, for instance, polymers like rubbers or even polymers combined with another material which has other proper
    DK 2017 70008 A1 ties than the rubber material, being synthetic or not. Choosing a rubber material makes the shim a vibration damper and, when the polymer is combined with another material, other properties could be added.
    By using rubber as a shim, the heat emitting properties are also quite good.
    In an eight aspect, the present invention also relates to a 3-point supporting system where a concave transition is located between the head and the arm.
    This makes it possible to avoid weakness due to notching of the torque arm construction between the part of the arm closest to the gearbox and the head of the torque arm.
    Description of the Drawing
    The invention will be described in further detail below by means of non-limiting embodiments with reference to the drawing, in which:
    Fig. 1 shows an exemplary embodiment of a wind turbine with a rotor assembly,
    Fig. 2 shows one example of a drivetrain according to prior art,
    Fig. 3 shows another example of a drivetrain according to prior art,
    Fig. 4 shows a torque arm with a pin shaft according to prior art,
    Fig. 5 shows the principle of the new and claimed 3-point supporting system,
    Fig. 6 shows a torque arm with a square head,
    Fig. 7 shows an embodiment of the square head,
    Fig. 8 shows another embodiment of the square head,
    Fig. 9 shows a square head of a torque arm with a square cross section seen from the free end of the torque arm,
    Fig. 10 shows a square head of a torque arm with a rectangular cross section seen from the free end of the torque arm,
    Fig. 11 shows a square head of a torque arm seen from the side of the torque arm, where the head is square in cross section,
    Fig. 12 shows a square head of a torque arm seen from the side of the torque arm, where the head is rectangular in cross section.
    DK 2017 70008 A1
    In the drawings and in the detailed part of the description, the following reference numerals have been used:
    Wind turbine
    Wind turbine tower
    Foundation
    Nacelle
    Rotor
    Hub
    6a Hub, front end
    6b Hub, back end
    Wind turbine blades
    Drivetrain
    Main bearing
    Main shaft
    Torque arm
    Gearbox suspension
    Gearbox
    Main frame
    Generator
    Pin shaft
    Square head
    Centre axis, main shaft
    First surface, square head
    Second surface, square head
    Shortest side, rectangle
    Fongest side, rectangle
    U-shaped channel member
    Pressing plate
    Shim
    Fateral pressing plate
    Free end, square head
    DK 2017 70008 A1
    Detailed Description of the Invention
    Figure 1 shows an exemplary embodiment of a wind turbine 1 with a rotor assembly. The wind turbine 1 comprises a wind turbine tower 2 having a bottom end mounted to a foundation 3 which may be an onshore foundation as well as an offshore foundation. A nacelle 4 is rotatably connected to a top end of the wind turbine tower 2, e.g. via a yaw bearing connected to a control system (not shown). A rotor 5 is rotatably connected to the nacelle 4, e.g. via a main shaft (not shown). The rotor 5 comprises a hub 6 to which at least two, e.g. three, wind turbine blades 7 are mounted. Each wind turbine blade comprises a tip end and a blade root. The hub 6 comprises a front end 6a facing away from the nacelle 4 and a back end 6b facing the nacelle 4. The wind turbine blades 7 may be traditional full-span pitchable blades as shown in fig. 1 or partial pitchable blades (not shown) having an inner blade section and outer blade section. A pitch bearing (not shown) is arranged between the hub 6 and wind turbine blade 7 or between the inner and outer blade sections of the wind turbine blade 7.
    Figure 2 shows one example of prior art of a drivetrain 8 seen from the upwind direction and towards the downwind direction, comprising a hub 6 and the hub back end 6b before the first point of support comprising the main bearing 9, the main shaft 10, then the second and third points of support comprising the torque arm 11 and the gearbox suspension 12 before the gearbox 13. The tree points of support are all connected to the main frame 14.
    Figure 3 shows another example of prior art of a drivetrain 8 seen from another position, where the drivetrain seen from the upwind direction and towards the downwind direction, likewise comprises a hub 6, the first point of support comprising the main bearing 9, the main shaft 10, then the second and third points of support comprising the torque arm 11 and the gearbox suspension 12 before the gearbox 13 and further a generator 15. The figure further shows a pin shaft 16 connecting the torque arm 11 with the gearbox suspension 12. The tree points of support are all connected to the main frame 14.
    Figure 4 shows in more detail a torque arm 11 with a pin shaft 16 according to prior art and as shown and described previously at figure 3.
    DK 2017 70008 A1
    Figure 5 shows the principle of the new and claimed 3-point supporting system of a wind turbine drivetrain 8, comprising a main bearing 9, a main shaft 10, a gearbox 13 with torque arms 11 mounted to a main frame 14, where each torque arm 11 further comprises a square head 17. The centre axis 18 of the main shaft 10 is also shown.
    Figure 6 shows a torque arm 11 with a square head 17 with a first surface 18 and a second surface 19 being substantially parallel and configured to be substantially parallel with a plane containing the centre axis 18 of the main shaft 10. The first surface 19 and the second surface 20 are substantially flat and substantially rectangular.
    Figure 7 shows an embodiment, where the first surface 19 and the second surface 20 are substantially flat and substantially rectangular, where the shortest side 21 of the rectangle is the free end of the torque arm 11.
    Figure 8 shows another embodiment, where the first surface 19 and the second surface 20 are substantially flat and substantially rectangular, where the longest side 22 of the rectangle is the free end of the torque arm 11.
    Figure 9 shows a square head 17 of a torque arm 11 seen from the free end of the torque arm 11, where the head 17 is square in cross section perpendicular at the first surface 19 and the second surface 20 and parallel to the centre axis 18 of the main shaft 10 (se figure 5). The head 17 of the torque arm 11 is contained in a substantially U-shaped channel member 23 and a pressing plate 24 is arranged at the open side of the U-shaped channel member 23 for fastening the head 17 in the U-shaped channel member 23, and the U-shaped channel member 23 is mounted at the main frame 14.
    Figure 9 also shows that at least a shim 25 is located between the first surface 19 and the U-shaped channel member 23 and between the second surface 20 and the Ushaped channel member.
    Figure 10 shows a square head 17 of a torque arm 11 seen from the free end of the torque arm 11, where the head 17 is rectangular in cross section perpendicular at the first surface 19 and the second surface 20 and parallel to the centre axis 18 of the main shaft 10 (se figure 5). The head 17 of the torque arm 11 is contained in a substantially
    DK 2017 70008 A1
    U-shaped channel member 23 and a pressing plate 24 is arranged at the open side of the U-shaped channel member 23 for fastening the head 17 in the U-shaped channel member 23, and the U-shaped channel member 23 is mounted at the main frame 14.
    Figure 10 also shows that at least a shim 25 is located between the first surface 19 and the U-shaped channel member 23 and between the second surface 20 and the Ushaped channel member.
    Figure 11 shows a square head 17 of a torque arm 11 seen from the side of the torque arm 11, where the head 17 is square in cross section and perpendicular to the centre axis 18 of the main shaft 10 (se figure 5). The head 17 of the torque arm 11 is contained in a substantially U-shaped channel member 23 and a pressing plate 24 is arranged at the open side of the U-shaped channel member 23 for fastening the head 17 in the U-shaped channel member 23, and the U-shaped channel member 23 is mounted at the main frame 14.
    Figure 11 also shows that at least a shim 25 is located between the first surface 19 and the U-shaped channel member 23 and between the second surface 20 and the Ushaped channel member. Figure 11 further shows that the U-shaped channel member 23 comprises a lateral pressing plate 26, where also a shim 25 is located between the free end 27 of the square head 17 and the lateral pressing plate 26 . Between both the first surface 19 and the second square 20 of the square head 17 and the torque arm 11 there is a concave transition 28.
    Figure 12 shows a square head 17 of a torque arm 11 seen from the side of the torque arm 11, where the head 17 is rectangular in cross section perpendicular to the centre axis 18 of the main shaft 10 (se figure 5). The head 17 of the torque arm 11 is contained in a substantially U-shaped channel member 23 and a pressing plate 24 is arranged at the open side of the U-shaped channel member 23 for fastening the head 17 in the U-shaped channel member 23, and the U-shaped channel member 23 is mounted at the main frame 14.
    Figure 12 also shows that at least a shim 25 is located between the first surface 19 and the U-shaped channel member 23 and between the second surface 20 and the UDK 2017 70008 A1 shaped channel member. Figure 12 further shows that the U-shaped channel member 23 comprises a lateral pressing plate 26, where also a shim 25 is located between the free end 27 of the square head 17 and the lateral pressing plate 26. Between both the first surface 19 and the second square 20 of the square head 17 and the torque arm 11 there is a concave transition 28.
    DK 2017 70008 A1
    权利要求:
    Claims (8)
    [1] 1. 3-point supporting system of wind turbine drivetrain comprising main bearing, main shaft and gearbox with torque arms mounted to a main frame, characterised in that each torque arm further comprises a head with at least a first surface and a second surface being substantially parallel and configured to be substantially parallel with a plane containing the centre axis of the main shaft, the system further comprising a substantially U-shaped channel member being configured for containing the head and at least one pressing plate arranged at the open side of the U-shaped channel member for fastening the head in the U-shaped channel member, where the U-shaped channel member is configured for mounting at the main frame.
    [2] 2. 3-point supporting system according to claim 1, characterised in that the head is substantially rectangular in cross section perpendicular at the first surface and the second surface.
    [3] 3. 3-point supporting system according to any of claims 1 and 2, characterised in that the first surface and the second surface are substantially flat and substantially rectangular.
    [4] 4. 3-point supporting system according to any of claims 1 to 3, characterised in that the U-shaped channel member further comprises a lateral pressing plate.
    [5] 5. 3-point supporting system according to any of the claims 1 to 4, characterised in that at least a shim is located between at least the first surface and the U-shaped channel member and between the second surface and the U-shaped channel member.
    [6] 6. 3-point supporting system according to any of the claims 1 to 5, characterised in that the head further comprises a free end, where at least a shim is located between the free end and the lateral pressing plate.
    [7] 7. 3-point supporting system according to any of the claims 6 to 7, characterised in that the shims comprise a rubber material.
    DK 2017 70008 A1
    [8] 8. 3-point supporting system according to any of the claims 1 to 8, characterised in that a concave transition is located between the head and the arm.
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    同族专利:
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    DK179438B1|2018-08-16|
    CN108278181A|2018-07-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN101363419A|2008-09-17|2009-02-11|株洲时代新材料科技股份有限公司|Gear box vibration damping supporting method and device for wind-driven generator group|
    EP2172647B1|2008-10-03|2019-06-26|GE Renewable Technologies Wind B.V.|Method and system for aligning a wind turbine component|
    EP2434154A1|2010-09-28|2012-03-28|Siemens Aktiengesellschaft|Wind turbine active damping arrangement|
    US9683553B2|2013-09-06|2017-06-20|General Electric Company|System and method for monitoring wind turbine loading|
    CN104100464B|2014-07-03|2016-07-06|株洲时代新材料科技股份有限公司|A kind of wind-driven generator wheel-box vibroshock and vibration damping guard method thereof|
    US9856966B2|2014-08-27|2018-01-02|General Electric Company|Drivetrain assembly for a wind turbine|
    法律状态:
    2018-08-10| PAT| Application published|Effective date: 20180707 |
    2018-08-16| PME| Patent granted|Effective date: 20180816 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201770008A|DK179438B1|2017-01-06|2017-01-06|3-point supporting system of wind turbine drivetrain|DKPA201770008A| DK179438B1|2017-01-06|2017-01-06|3-point supporting system of wind turbine drivetrain|
    CN201810007769.4A| CN108278181A|2017-01-06|2018-01-04|The three-point support system of wind turbine powertrain|
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