• 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:
    The invention relates to a wind turbine, in particular a rotor assembly for a wind turbine. The rotor assembly contains blades with an economical cable system.
    公开号:BE1021430B1
    申请号:E2012/0632
    申请日:2012-09-24
    公开日:2015-11-19
    发明作者:Robercht Dumarey；Jozef Robrecht Jan Versavel
    申请人:Joval Nv；
    IPC主号:
    专利说明:

    A ROTOR WHOLE FOR A WIND TURBINE
    [1] The invention relates to a wind turbine, in particular a rotor assembly for a wind turbine.
    [2] Wind turbines are often used to produce electrical energy from electrical energy by converting wind kinetic energy. A wind turbine with a horizontal axis contains a tower, a gondola and a rotor assembly with a plurality of blades. The rotor assembly is mounted in the gondola by means of a shaft connected directly or indirectly to a generator for generating electrical energy.
    [3] A known wind turbine is described in WO2008 / 067083. This is a wind turbine with a rotor whole. This rotor assembly comprises a central hub with a central axis of rotation and a plurality of vanes which are each attached to their first central end on the central hub and extend substantially radially with respect to the central axis of rotation up to their second radial end along their longitudinal axis. These blades each contain a spreader arranged at an intermediate point located between the first central end and the second radial end. This spreader works together with a cable system that anchors the wick via three cables to the central hub in order to reinforce the structure of the wicks. However, an ancillary wheel is required for anchoring the cables to the central hub which has the important function of a wider provide the basis for the attachment points for the cables, to reduce the forces being developed in the cables. In particular the forces that are developed in the cables as a result of deformation of the wick transversely of the central axis of rotation.
    [4] Another wind turbine with a rotor with blades with a spreader and a cable system is known from WO2008 / 111841. To widen the basis for the cables that have to absorb deformation transversely of the axis of rotation, these cables are connected to the nearby blades. However, in this way this deformation can be absorbed less efficiently since with a similar deformation of all blades the supporting effect of these cables is canceled out. Furthermore, the cable system is supplemented with a structure with rods that run from the spreader to the central hub and that must also absorb compressive forces, thereby limiting their length. This limits the distance from the spreader to the central axis of rotation.
    [5] Another such wind turbine is known from DE19606359, this mechanism is only capable of compensating for deformation of the vane according to the central axis of rotation. A rod mechanism is also used here, as a result of which their length is limited and the distance from the spreader to the axis of rotation is thus limited.
    [6] Consequently, there is a need for a rotor assembly for a wind turbine that overcomes the aforementioned disadvantages and more particularly a rotor assembly for a wind turbine with blades with an improved cable system so that the blades can better withstand the load to which they are subjected. exposed and easier and lighter to manufacture.
    [7] According to a first aspect of the invention, there is provided a rotor assembly for a wind turbine comprising: - A central hub with a central axis of rotation; and - A plurality of vanes each attached to their first central end on the central hub and extending substantially radially with respect to the central axis of rotation up to their second radial end along their longitudinal axis; these blades each comprising: - A spreader arranged at an intermediate point located between the first central end and the second radial end; and - A cable system that cooperates with the wick and the central hub,
    THAT IS CHARACTERIZED THAT - The central hub contains at least three first attachment points; - The wick at the level of the second radial end contains at least three corresponding second fixing points; - The spreader contains at least three corresponding third attachment points; - The wick at the level of the intermediate point comprises at least three corresponding fourth attachment points, the distance from the longitudinal axis of the wick to the second and fourth attachment points being smaller than to the first and third attachment points; and that - The cable system comprising: - a first cable system comprising at least three corresponding cables connecting the first attachment points and the corresponding fourth attachment points respectively; and - a second cable system comprising at least three corresponding cables connecting the first attachment points and the corresponding second attachment points via the corresponding third attachment points, respectively.
    [8] The rotor assembly according to the invention makes it possible to limit the basis for fixing the cables of the first cable system to the central hub because they are mounted at the height of the spreader and close to the longitudinal axis of the wick. Additional structures for, among other things, fixing the cables are no longer necessary. Moreover, this can be achieved by means of wicks with a simple and light construction.
    [9] According to an embodiment, for each vane the first mounting points and the corresponding third mounting points are arranged such that: - there is at least one mounting point on either side of the plane covered by the longitudinal axis L the vanes; and - there is at least one attachment point on either side of the plane formed by the longitudinal axis of the vane and the central axis.
    [10] The rotor assembly according to the invention is also capable of more efficiently absorbing the deformation of the vanes in the plane covered by the longitudinal axis of the vanes, since these forces are transmitted directly via the cables of the first cable system which are mounted near the longitudinal axis of the wick and not at the ends of the arms of the spreader, which reduces the load on the spreader.
    [11] According to a further embodiment, the distance to the longitudinal axis of the first attachment points substantially corresponds to the corresponding third attachment points.
    [12] According to yet another embodiment, the first attachment points are arranged such that they substantially correspond to a projection of the at least three third attachment points along the longitudinal axis of the vane.
    [13] According to a preferred embodiment the vane comprises a first central vane part which extends from the first central end to an intermediate point; and a second radial vane part that is attached to the first central vane part and extends from the intermediate point to the second radial end [14] The spreader can also be positioned further towards the radial end of the vane, which makes it possible to place a surface that is covered by maximizing the radial blade part. Moreover, this offers the possibility of limiting the maximum length of the parts of the rotor assembly, which is advantageous during transport.
    [15] Preferably, only the second radial vane part comprises a wing with a shape suitable for being driven by the wind.
    [16] According to an embodiment, the wing is made as an extrusion profile.
    [17] The rotor assembly according to the invention can in this way make use of an easily man-made wing.
    [18] According to an embodiment, the first central vane part comprises a tube.
    [19] According to a further embodiment, the second radial blade part comprises a tube which can be fitted at the level of the intermediate point to the tube of the first central blade part and to which the wing is attached.
    [20] According to yet another embodiment, the wing is rotatably mounted on the tube of the second radial blade part.
    [21] According to an embodiment the wing has an inner cavity along the longitudinal axis of the wick into which the tube of the second radial wick part can be inserted.
    [22] This makes it possible to manufacture the rotor assembly with simple components.
    [23] The vane preferably comprises a positioning mechanism and a control device coupled thereto, which upon activation is configured to adjust the position of the wing; and that the wing is shaped and / or arranged so that the wing turns out of the wind when the control device is deactivated.
    [24] According to an embodiment, the positioning mechanism and the control device coupled thereto are configured such that, when a predetermined rotational speed of the rotor assembly is exceeded, the wing turns out of the wind.
    [25] This makes it possible to protect the rotor assembly against overload.
    [26] According to an embodiment, the positioning mechanism comprises a hydraulic actuator and the control device coupled thereto comprises a hydraulic circuit.
    [27] According to a further embodiment, the positioning mechanism and / or the control device coupled thereto are arranged in the rotor assembly, the control device further comprising: - an energy supply configured to be recharged by means of an electric generator arranged on the rotor assembly or from a stationary energy source by means of wireless energy transfer; and / or - a wireless communication module configured to enable wireless communication between the control device and a stationary control device.
    [28] This makes it possible to mount and control the rotor assembly actuators in a simple manner without complex mechanical transmissions.
    [29] The invention will now be further described with reference to the drawings in which: [30] Figure. 1 shows an embodiment of a wind turbine according to the invention; Figures 2 and 3 show a partial view of the rotor assembly of the wind turbine of Figure 1; and [32] Figures 4A-C and 5 show an embodiment of a vane positioning mechanism.
    Figure 1 shows an embodiment with a wind turbine 1 with a rotor assembly 10 according to the invention. It concerns a horizontal axis wind turbine 1 with a gondola 3 which is rotatably mounted on a tower 2. The rotor assembly 10 is itself rotatably arranged in the gondola to rotate about a substantially horizontal central rotation axis R. The rotor assembly 10 is Provided "off-wind", this means during operation in the wind direction W at the rear of the gondola 3. Such an arrangement offers the advantage that they do not need an additional mechanism to keep the rotor assembly 10 in the wind. According to an alternative embodiment, the rotor assembly 10 can also be arranged "upwind", for example to avoid the adverse effects of the turbulence at the rear of the tower, but this requires an additional mechanism to keep the rotor assembly in the wind, such as for example a wind vane or a wind sensor combined with a servo motor.
    The rotor assembly 10 is rotatable about a substantially central horizontal axis of rotation R and includes a central hub 12 whose central axis coincides with the central horizontal axis of rotation R. Three blades 14 are mounted on this central hub. It is clear that, according to alternative embodiments, a different plurality of vanes can be provided, such as, for example, two, four, five, ... The vanes 14 are mounted on their first central end 22 on the central hub 12 and extend according to their longitudinal axis L substantially radial with respect to the central axis of rotation R up to their second radial end 32.
    [35] As shown in Figure 1 and also in more detail in Figures 2 and 3, these vanes 14 each have a spreader 40 arranged at an intermediate point located between the first central end 22 and the second radial end 32. In addition, these vanes 14 also each contain a cable system 60 which cooperates with the vane 14 and the central hub 12. This cable system 60 ensures that deformation of the vane 14 is prevented. It concerns both deformation by loading on the vanes according to the direction of the central axis of rotation R, as well as deformation of the vanes 14 transversely of the central axis of rotation R. For this, the cable system 60 comprises a first cable system 61 and a second cable system 62 with at least three cables which cooperating with different attachment points so as to prevent deformation of the vanes 14 in these two directions. As described in more detail below, the mounting points for two of these three cables, namely the two cables that are mounted “on wind”, are formed on either side of the plane by the longitudinal axis L of the vane 14 and the central axis R. These two cables which are arranged "up-wind" and the third cable which is arranged "down-wind", i.e. on either side of the plane covered by the longitudinal axis L the vanes 14.
    The vane 14 is divided into two vane parts, i.e. the vane 14 contains a first central vane part 20 extending from the first central end 22 to the intermediate point 42. At this first central vane part 20 which according to this In the embodiment embodied as a tube 24, a second radial blade part 30 is then attached. This radial blade part 30 extends from the intermediate point 42 to the second radial end 32. As can be seen in this embodiment, this second radial blade part 30 comprises a tube 34 which is at the level of the intermediate point 42 on the tube 24 of the first central blade part. 20 is arranged. A wing 35 with a shape suitable for being driven by the wind is arranged around this tube 34 of the radial blade part 30. This wing 35 can be fixedly attached to this tube 34, but according to a preferred embodiment, this wing 35 is rotatably mounted on this tube 34 in order to be able to be rotated in different positions as will be further described with reference to Figures 4A-C by means of an actuator 72. Splitting the vane 14 into two parts is advantageous because in this way the vane 14 can be transported more easily in the dismantled state. Moreover, this also makes it possible to manufacture the wing 35 with an easily produced profile, for example an aluminum or plastic extrusion profile. An embodiment of such a profile for the wing 35 is shown, for example, in Figures 4A-C, wherein the wing 35 along the longitudinal axis L of the vane 14 comprises an internal cavity 38 into which the tube 34 of the second radial vane part 30 can be inserted.
    [37] The first cable system 61 comprises three cables 96, 97, 99 arranged between three attachment points 16, 17, 19 on the central hub 12 and three attachment points 56, 57, 59 on the vane 14 at the intermediate point 42 The mounting points 16, 17, 19 are arranged at a distance d1 from the longitudinal axis L of the vane 14. The mounting points 56, 57, 59 are arranged as shown in Figure 2 on the tube 24 of the central vane part 20 at the height of the spreader 40. According to a variant embodiment, the fixing points can be arranged in a similar manner near the longitudinal axis L on, for example, the spreader 40 or on the tube 34 of the radial winding part 30. It is important here that the distance to the longitudinal axis L of the vane 14 of the attachment points 56, 57, 59 is smaller than the distance d1 from the longitudinal axis L to corresponding attachment points 16, 17, 19. In this way, these cables form 96, 97, 98 arranged at an angle A1. The smaller this angle A1, the greater the forces that will be developed in the cables 96, 97, 98 as a result of loads on the vane 14 transversely of the longitudinal axis L. Such loads can arise as a result of the load on the wind on the vanes 14, but also, for example, as a result of their own weight, even in a non-loaded state. Because the attachment points 56, 57, 59 are arranged as close as possible to the longitudinal axis L, the angle A1 is largely determined by the distance d1 from the attachment point 16, 17, 19 to the longitudinal axis L and the length L1 of the central vane part 20. The distance d1 is limited by the dimensions of the central hub 12, as well as the minimum distance that must be respected between the cables and the tower 2. By limiting the distance L1, i.e. by arranging the cables 96, 97 99 at the height of the intermediate point 42, the angle A1 can be kept sufficiently large without the need for aids to increase the distance d1 at the height of the central hub 12. As is further visible in Figure 2, the cables are provided at the attachment points 16, 17, 19 with known cable tensioners in order to be able to adjust the tension in the cables 96, 97, 99 so as to impart the desired rigidity to the central winding part 20, without requiring complex profiles or materials with a very high rigidity for the tube 24. The tube 24 can for instance be manufactured from a suitable metal such as for example steel or aluminum. In this way a simple and light construction for this central vane part 20 becomes possible.
    [38] The second cable system 62 includes three cables 106, 107 and 109 arranged between the attachment points 16, 17, 19 on the central hub 12 and corresponding attachment points 36, 37, 39 arranged at the radial end 32 of the vane 14. In order to maximize the angle A2 between the cables 106, 107 and 109 and the longitudinal axis L of the vane 14, the cables 106, 107, 109 at the height of the radial end 32 are as close as possible to the longitudinal axis L mounted on the tube 34 and guided via corresponding attachment points 46, 47, 49 on the ends of the corresponding arms 43, 44, 45 of the spreader 40. These attachment points 43, 44, 45 on the ends of the spreader arms 43, 44, 45 are arranged at a distance d2 from the longitudinal axis L. Here too it applies that the distance d2 is chosen to be as large as possible, but also here, just as for the distance d1, the limitation of the minimum distance that must be respected between the cables 106, 107, 109 of the second cable system 62 and the tower 2 applies. Moreover, it is advantageous to also use the same fixing points 16, 17, 19 on the central hub 12 for the cables 106, 107, 109 as for the cables 96, 97, 99 of the first cable system 61. In that case, as shown for the embodiment in Figures 1 to 3, the distance d1 to the longitudinal axis L of the attachment points 16, 17, 19 on the central hub 12 substantially corresponds to the distance d2 of the corresponding attachment points 46, 47, 49 at the ends of the arms 43, 44, 45 of the spreader 40. Moreover, according to this embodiment, the cables 106, 107, 109 run between the attachment points 16, 17, 19 on the central hub 12 and the attachment points 46, 47.49 on the ends of the arms 43, 44, 45 of the spreader 40 substantially parallel to the longitudinal axis L of the vane 14, whereby the respective attachment points 16, 17, 19 substantially correspond to a projection of the corresponding attachment points 46, 47, 49 along the longitudinal axis L of the vane 14. The second cable system is 62, thanks to the fastening points near the radial end 32 of the vane 14 capable of also increasing the rigidity of the radial vane part 30 and thanks to the action of the spreader 40 able to increase the load in the cables 106, 107, 109 by a factor of three to reduce by four. Here too, by limiting the length L2 of the radial blade part 30, i.e. by arranging the attachment points 46, 47, 49 on the ends of the spreader, arms 43, 44, 45 at the height of the intermediate point 42 become the angle A2 be kept sufficiently large even though the cables 106, 107, 109 are guided to the radial end 32 of the vane 14. As visible in Figure 2, these cables 106, 107, 109 are also provided with known cable tensioners at the attachment points 16, 17, 19 in order to be able to adjust the tension in the cables 106, 107, 109 so that the desired rigidity on the radial part 30 without requiring complex profiles or materials with a very high rigidity for the tube 34. The tube 34 can then, similar to the tube 24, be manufactured, for example, from a suitable metal such as, for example, steel or aluminum, which also makes a simple and light construction possible for this radial blade part 30.
    [39] As can be seen in Figures 1-3, a wing 35 is provided only on the radial blade part 30. Although, according to a variant embodiment, it is also possible to arrange a wing on the central wing part 20, this will often result in a more complex shape of the wing, in particular close to the central hub 12. Moreover, the power generated is by the rotor assembly 10 proportional to the surface covered by the wings of the vanes 14 and a rotor assembly 10 as shown in Figures 1-3 can be made by the fact that the wings 35 with easily manufactured wings 35 at a certain distance from the center When the hub 12 is mounted, a larger area can be covered for a given wing length L2 if this distance increases. As a result, it is desirable to be able to choose the distance L1 to the intermediate point 42 sufficiently large. Moreover, it is also advantageous for the transport of the rotor assembly 12 if the length L2 of the radial blade part 30 and the length L1 of the central blade part 20 remain within certain legal limits. For example, the length L1 and L2 can be approximately 6 or 12 meters so that they can be transported using standard containers. During assembly, both blade parts can then be connected to each other by means of suitable fastening elements such as for example bolts or a clamp connection at the level of the intermediate point 42.
    In the exemplary embodiment of Figures 1-3, the first cable system 61 and the second cable system 62 each comprise three cables, the attachment points 16, 17, 18 of which are on the central hub 12 and the corresponding attachment points 46, 47, 49 on the ends of the spreader arms 43, 44, 45 are arranged so as to provide stability with respect to all loads on the vane 14 transversely of the longitudinal axis L. The fixing points 16, 17 are provided for this purpose; 46, 47 and the attachment point 19; 49 on either side of the plane covered by the longitudinal axis L the vanes 14 to absorb loads substantially in the direction of the axis of rotation. Two fastening points 16, 17; 46, 47 are provided on the "wind-up" side because during normal operation the load on this side is greatest and can therefore be divided between the two corresponding cables 96, 97; 106, 107 on this side. Furthermore, the attachment point 16 is located; 106 and the attachment point 17; 107 on either side of the plane formed by the longitudinal axis L of the vane 14 and the central axis R, which makes it possible to also optimally absorb the loads transverse to the wind direction. The cable system 60 with three cables as described above is optimal in minimizing additional air resistance of the rotor assembly. According to variant embodiments of the rotor assembly 10, it is also possible, for example, to arrange four, five or more cables, to further distribute the load over the cables or to provide redundancy in the event of a cable break.
    [41] If the wing 35 is mounted in a fixed position, for example fixedly on the tube 34, the components of the vane 14 must be dimensioned such that they can survive the highest possible load that can be caused by the wind. In order to reduce the maximum load on the components of the vane 14, and thus to be able to dimension lighter and simpler, it is preferable to rotatably attach the wing 35 to the tube 34 of the second radial vane part 30. In this way the wing 35 can be turned out of the wind in the event of imminent overload, that is to say rotated to a position around the longitudinal axis L of the vane 14, whereby the impact of the wind is minimal. For the embodiment shown in Figures 1-3, for this purpose the wing 35 along the longitudinal axis L of the vane 14 is provided with an internal cavity 38 into which the tube 34 of the second radial vane part 30 can be inserted, and on which the wing 35 by means of a suitable bearing is rotatably mounted.
    An embodiment of a positioning mechanism 70 and a control device 80 coupled thereto is schematically shown in Figures 4A-C. The positioning mechanism 70 is designed as a hydraulic actuator 72, for example a single-acting hydraulic actuator 72 with a built-in return spring, but according to alternative embodiments this can also be an electric, pneumatic or any other suitable type of actuator. The hydraulic actuator 72 is connected on one side to the tube 34 of the radial wick part 30 via an arm 76, which may, for example, coincide with the arm 45 of the spreader 40. On the other side, the actuator 72 is connected to the wing 35 via an arm 74. The actuator 72 is thus capable of determining the position of the wing 35 which is rotatably mounted on the tube 34 of the radial wing part 30 with a bearing 78.
    Figure 4B shows the wing 35 in its starting position. In this position the wind has sufficient impact on the wing 35 so that a sufficient torque can be generated to allow the rotor assembly 10 to be set into motion from a standstill. The wing 35 is here at a certain angle of incidence with respect to the relative wind direction. This angle of incidence of the wind direction ensures that the largest possible starting moment is generated. Once the rotor assembly 10 has been brought up to speed from a standstill, the actuator 72 can be controlled by the control device 80 such that the wing 35 is brought to the position shown in Figure 4A. In this position, the wing is placed substantially transversely to the wind direction in order to find a better balance between the force generated by the wind on the wing and the air resistance experienced by the wing 35 when rotating the rotor assembly 10 during the normal operation of the rotor. wind turbine 1. Finally, in figure 4C the wing 35 is shown in a position that is taken when the wind turbine is deactivated, for example to prevent overloading at too high wind speeds or for maintenance. The wing 35 in this position is substantially aligned with the wind direction so that the moment developed by the rotor assembly 10 is reduced. In order to ensure safe operation of the rotor assembly 10, the wing 35 is formed in this way or means are provided such as springs, actuators or other elements which, upon deactivation of the control device 80, turn the wing 35 out of the wind so that it positions itself as shown in Figure Take 4C. Also when a predetermined rotational speed of the rotor assembly 10 is exceeded, which can for instance be determined by means of a suitable angular rotation sensor or by means of elements controlled by a centrifugal force, the wing 35 is also moved to the position shown in Figure 4C. rotated to avoid overloading the rotor assembly 10.
    Figure 5 shows an embodiment of a control device 80 for the actuator 72 shown in Figures 4A-C. This control device 80 comprises, for example, a hydraulic circuit 84, 85, 86 with hydraulic components, optionally supplemented with an electronic processing unit 81 and suitable energy supplies and / or energy sources 82, 86. Furthermore, the control device is coupled to suitable sensors 88, 89 for, for example, the rotational speed of the rotor assembly 10 or the position of the wings 35. The hydraulic circuit 84, 85, 86 is controlled by the electronic processing unit 81 in such a way that the position of the actuator 72 is controlled as a function of the rotational speed of the rotor assembly 10 or on the basis of settings of an operator, for example for maintenance of the wind turbine 1 possible. For this purpose the hydraulic circuit comprises a suitable energy source 86 with a supply of hydraulic fluid such as a hydraulic pressure vessel or an accumulator combined with, for example, a suitable hydraulic pump capable of supplying or discharging the hydraulic fluid to the actuator 72. Furthermore, the hydraulic circuit comprises, for example, a centrifugal valve 84 which, in function of the rotational speed of the rotor assembly 10, actuates the actuator 72 when the maximum permissible rotational speed is exceeded in order to deactivate the wings 35 by moving them to the position shown in Figure 4C. In addition, the hydraulic circuit also includes an electrically controlled valve or valve 85. This valve 85 is controlled so that hydraulic fluid is supplied or discharged to the actuator 72 so that the actuator 72 moves the wing 35 to the desired position or holds it in the desired position. The valve 35 is controlled by an electronic processing unit 81 which, for example, automatically, based on the data from sensors, such as, for example, an angular displacement sensor 88 that detects the position of the wing 35 and an angular displacement sensor 89 that registers the rotational speed of the rotor assembly 10 of actuator 72 by means of valve 85. As mentioned above, the electronic processing unit 81 can also be controlled on the basis of instructions from an operator, for example to deactivate the wings 35 so that the rotor assembly 10 can easily be brought to a halt in order to make maintenance work possible. The electronic processing unit 81 is powered by means of an electrical energy supply 82 such as, for example, a suitable battery or a capacitor. This electrical energy supply 82, in turn, can supply energy to the hydraulic energy source 86, for example, to the hydraulic pump.
    Preferably, not only the positioning mechanism 70, but also the control device 80 coupled thereto, is arranged in the rotor assembly 10. This means that all the necessary means for the operation of the positioning mechanism 70 are also provided on the rotor assembly 10, for example in the wing 35 or on the vane 14 or in the central hub 12. In this case the electrical energy supply 82 will rotate along with the rotor assembly 10. To top up this energy supply 82, use can then be made, for example, of wireless energy transfer. This can be implemented, for example, as shown in Figure 5, by means of an inductive coupling between the electrical energy supply 82 arranged on the rotor assembly 10 and a stationary electrical energy source 87, for example an inductive battery charging station arranged in the gondola 3 or in the mast 2. According to an alternative embodiment, the energy supply 82 can be recharged by means of a dynamo or alternator or another suitable electric generator which is also arranged in the rotor assembly. The electric generator is arranged in the rotor assembly such that the rotation of the rotor assembly 10 is converted to a rotation of the electric generator so as to generate electrical energy that can supplement the electrical energy supply 82. This can be achieved, for example, by arranging the stator of the electric generator in the rotor assembly 10 and coupling the rotor of the electric generator to the gondola 3 so that during the rotation of the rotor assembly 10 the rotor of the electric generator rotates relative to its stator that is moved with the rotor assembly 10. To enable communication between the control device 80 that is present in the rotor assembly 10 and other control devices 90 that are stationary, for example a wind turbine control device that is present in the tower 2 or the gondola 3 or a service terminal used by an operator, use can be made of known systems for wireless data communication. The control device 80 which is arranged in the rotor assembly for this purpose comprises a wireless communication module 83, for example a WiFi, GSM, Bluetooth or another suitable module, which makes wireless communication possible with a stationary control device 90. In this way all elements are for optimum functioning. from the rotor assembly 10 to the rotor assembly 10 itself and can be operated without complex couplings for cables for energy transfer or communication between the rotor assembly 10 and the gondola 3 or the mast 2 of the wind turbine 1.
    According to a variant embodiment, the rotor assembly 10 according to the invention can be added to a third blade part at the extreme end of the blade 14. Between the second blade part and the third blade part, a second spreader 40 is then arranged for a third cable system which the radial end of the vane is guided which is now formed by the radial end of the third vane part. In a similar manner, it is also possible to provide a fourth, fifth or subsequent vane part.
    The invention is of course not limited to the exemplary embodiments and shown in the drawings, but also includes all alternatives and combinations that fall within the scope of the claims.
    权利要求:
    Claims (15)
    [1]
    A rotor assembly (10) for a wind turbine (1) comprising, - A central hub (12) with a central axis of rotation (R); and - A plurality of vanes (14) each attached to their first central end (22) on the central hub (12) and extending substantially radially with respect to the central axis of rotation (R) along their longitudinal axis (L) their second radial end (32); these blades (14) each comprising: - A spreader (40) disposed at an intermediate point (42) located between the first central end (22) and the second radial end (32); and - A cable system (60) cooperating with the vane (14) and the central hub (12), THAT IS CHARACTERIZED THAT - The central hub (12) contains at least three first attachment points (16, 17, 19); - The vane (14) at the level of the second radial end (32) comprises at least three corresponding second fixing points (36, 37, 39); - The spreader (40) contains at least three corresponding third attachment points (46, 47, 49); - The vane (14) at the level of the intermediate point (42) contains at least three corresponding fourth mounting points (56, 57, 59), the distance from the longitudinal axis (L) of the vane to the second and fourth mounting points (36, 37, 39; 56, 57, 59) is smaller than to the first and third attachment points (16, 17, 18; 46, 47, 49); and that - The cable system (60) comprising: - a first cable system (61) comprising at least three corresponding cables connecting the first attachment points (16, 17, 19) and the corresponding fourth attachment points (56, 57, 59), respectively; and - a second cable system (62) comprising at least three corresponding cables connecting the first attachment points (16, 17, 19) and the corresponding second attachment points (36, 37, 39) via the corresponding third attachment points (46, 47, 49) ).
    [2]
    A device according to claim 1, characterized in that for each vane (14) the first attachment points (16, 17, 18) and the corresponding third attachment points (46, 47, 49) are arranged such that: • there is at least one attachment point the vanes (14) covered on either side of the plane by the longitudinal axis L; and • there is at least one fixing point on either side of the plane formed by the longitudinal axis (L) of the vane (14) and the central axis (R).
    [3]
    A device according to claim 1 or 2, characterized in that the distance to the longitudinal axis (L) of the first attachment points (16, 17, 18) substantially corresponds to the corresponding third attachment points (46, 47, 48).
    [4]
    A device according to one or more of the preceding claims, characterized in that the first attachment points (16, 17, 18) are arranged such that they substantially correspond to a projection of the at least three third attachment points (46, 47, 48) according to the longitudinal axis (L) of the vane (14).
    [5]
    A device according to one or more of the preceding claims, characterized in that the vane (14) comprises a first central vane part (20) extending from the first central end (22) to an intermediate point (42); and a second radial blade part (30) attached to the first central blade part (20) and extending from the intermediate point (42) to the second radial end (32)
    [6]
    A device according to claim 5, characterized in that only the second radial blade part (30) comprises a wing (35) with a shape suitable for being driven by the wind.
    [7]
    A device according to claim 6, characterized in that the wing (35) is made as an extrusion profile.
    [8]
    A device according to claim 6 or 7, characterized in that the first central vane part (20) comprises a tube (24).
    [9]
    A device according to claim 8, characterized in that the second radial blade part (30) comprises a tube (34) that can be connected to the tube (24) of the first central blade part (20) at the height of the intermediate point (42) and to which the wing (35) is attached.
    [10]
    A device according to claim 9, characterized in that the wing (35) is rotatably mounted on the tube (34) of the second radial blade part (30).
    [11]
    A device according to claim 10, characterized in that the wing (35) has an inner cavity (38) along the longitudinal axis (L) of the vane (14) into which the tube (34) of the second radial vane part (30) can be introduced.
    [12]
    A device according to claim 10 or 11, characterized in that the vane (14) comprises a positioning mechanism (70) and a control device (80) coupled thereto, which upon activation is configured to adjust the position of the wing (35) ; and that the wing (35) is shaped and / or arranged such that when the control device (80) is deactivated, the wing (35) turns out of the wind.
    [13]
    A device according to claim 12, characterized in that the positioning mechanism (70) and the control device (80) coupled thereto are configured such that, when a predetermined rotational speed of the rotor assembly (10) is exceeded, the wing (35) out of the wind.
    [14]
    A device according to claim 12 or 13, characterized in that the positioning mechanism (70) comprises a hydraulic actuator (72) and that the control device (80) coupled thereto comprises a hydraulic circuit.
    [15]
    A device according to one or more of claims 10 to 14, characterized in that the positioning mechanism (70) and / or the control device (80) coupled thereto are arranged in the rotor assembly (10), the control device (80) further comprising: - an energy supply (82) configured to be recharged by means of an electric generator mounted on the rotor assembly or from a stationary energy source (87) by means of wireless energy transfer; and / or - a wireless communication module (83) configured to enable wireless communication between the control device (80) and a stationary control device (90).
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    同族专利:
    公开号 | 公开日
    US9759182B2|2017-09-12|
    EP2898215A1|2015-07-29|
    ES2609152T3|2017-04-18|
    WO2014044855A1|2014-03-27|
    BE1021430B9|2020-01-30|
    US20150233343A1|2015-08-20|
    EP2898215B1|2016-11-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    EP2112372A1|2008-04-21|2009-10-28|Lm Glasfiber A/S|Wind turbine with blades supported on the leeward site|
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    BE1021684B1|2013-05-24|2016-01-08|Joval Nv|A ROTOR WHOLE FOR A WIND TURBINE WITH A CABLE COUPLE|
    DE202015100837U1|2014-02-28|2015-03-20|Horst Löwe|Wind turbine with days ahead of the rotor blades|US20180017037A1|2016-07-14|2018-01-18|James L. Kissel|Hub and Rotor Assemby for Wind Turbines with Conjoined Turbine Blades|
    CN112879229A|2021-01-27|2021-06-01|姚加者|Wind power generation auxiliary intelligent equipment capable of reducing load force of flow distribution plate|
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    法律状态:
    2018-06-28| FG| Patent granted|Effective date: 20151119 |
    2018-06-28| MM| Lapsed because of non-payment of the annual fee|Effective date: 20170930 |
    优先权:
    申请号 | 申请日 | 专利标题
    BE20120632A|BE1021430B9|2012-09-24|2012-09-24|A ROTOR WHOLE FOR A WIND TURBINE|BE20120632A| BE1021430B9|2012-09-24|2012-09-24|A ROTOR WHOLE FOR A WIND TURBINE|
    US14/428,662| US9759182B2|2012-09-24|2013-09-23|Rotor assembly for a wind turbine|
    PCT/EP2013/069755| WO2014044855A1|2012-09-24|2013-09-23|A rotor assembly for a wind turbine|
    EP13770660.2A| EP2898215B1|2012-09-24|2013-09-23|A rotor assembly for a wind turbine|
    ES13770660.2T| ES2609152T3|2012-09-24|2013-09-23|Rotor unit for a wind turbine|
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