• 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:
    A vertical axis wind turbine for energy production with rotor blades of flexible material that is stretched at higher rotational speeds. The flexible material is attached so that the wing has a teardrop-shaped profile in cross section.
    公开号:SE1100688A1
    申请号:SE1100688
    申请日:2011-09-21
    公开日:2013-03-05
    发明作者:Staffan Johansson
    申请人:Staffan Johansson；
    IPC主号:
    专利说明:

    The wind turbine according to the invention comprises a vertical turbine shaft (4) with a number of turbine blades of a flexible material with a rectangular or square surface and a number of round, vertical masts (3), each turbine blade being arranged at a vertical mast (3) mounted at an outer end of a radial support arm (5) connected to the turbine shaft (4). Two substantially horizontal, parallel booms (6) are fixedly mounted at right angles to the turbine radius at the upper and lower ends of each mast. Alternative embodiments of the turbine shaft and supporting parts are set out in claims 2 and 3. The flexible material is folded around the vertical mast, the two sides of the material meeting at a distance from the back of the mast where the two corner pairs are attached with rope or wire (7) which line or wire connects the material to bushings (8) in the free ends of each boom, which bushings allow the material to be stretched from a point spaced from the boom end and the material to be mounted by hoisting in place from the lower edge of the turbine. The size of the material is adapted to the length of the mast and barriers so that in the folded condition around the mast it is shorter than the length of the barriers, and in the other direction, shorter than the length of the mast so that there is a distance for stretching. The corners of the flexible material have attachment points suitable for attachment with rope or wire, for example loops. An additional attachment point can be set up on the upper edge of the flexible material, in the middle of the width of the material, to facilitate lifting. At said attachment point, an additional rope or wire is attached to the respective flexible material. The fifth attachment point also relieves the upper corner pair from the weight of the material after assembly. The flexible material describes, attached as above, a symmetrical, teardrop-shaped profile in cross section, which profile is curved by the influx of the wind, the overpressure side becoming concave and the underpressure side convex. During the rotation revolution around the vertical turbine axis, the material is mirrored by the influx of the wind at each half rotation rotation. Only one side of the material is visible, mounted as above, which allows a simple procedure when printing advertising, text or other decor and that little consideration needs to be given to the transparency of the material or color. The material is stretched at higher rotational speeds by a centrifugal force-dependent device in that at least one of the attachments of the corner pair is connected to a device arranged on the support arm which comprises a substantially horizontal lever (9) with a mass element (10) arranged at one end of the lever. At the other end a fastening point (11) is arranged which with a rope or wire (7) connects one or both corner pairs of the flexible material to the said end of the lever. The pivot point (12) of the lever consists of a shaft arranged substantially vertically through the lever, the directional deviation of which relative to the vertical determines the angle of the lever relative to the horizontal plane, the directional deviation of said shaft from a vertical guiding the mass element position that the lever is allowed to rotate, the mass element falling to the lowest point, in relation to the horizon line, on the periphery about said axis. The shaft which constitutes the pivot point of the lever thus, by suitable mounting and fixing in a direction deviating from the vertical line, guides the lever so that no stretching of the flexible material takes place when the turbine speed is low or zero, by the mass element falling to a point inside the lever. pivot point in relation to the turbine radius and thus the other end of the lever is closer to the turbine wing. In this position, a relatively large curvature of the profile of the turbine blade is allowed by the action of the wind.
    The tuning possibilities with shaft inclination, the weight of the mass element and the proportions of the lever on each side of the pivot point are easily understood. At higher speeds, the profile of the flexible material is smoothed out by the action of a centrifugal force on the mass element so that the resulting force in the lever's attachment point to the flexible material stretches the flexible material and the profile is adapted to a smaller angle of inclination to the turbine blade.
    According to an alternative design (Fig. 2) of the centrifugal force-dependent stretching device, one or both attachment lines of the flexible material run in penetrations along the support arm past the lever to fixed attachment points at a distance from the lever. When set up, the device allows an arm (14), fixedly arranged at a suitable angle on the lever, to allow the line to take a detour between the point of attachment of the flexible material and the line to be attached somewhere on the turbine structure even when the speed is low or zero. Said arm does not reach as far from the point of rotation as the main and straight end of the lever. When the mass element is thrown out by the rotation of the turbine, the main, straight and longer end of the lever pushes out the line more and stretching of the flexible material takes place. At high speeds on the turbine the mass element can then be thrown out with sufficient force for the end of the lever with the resulting force to pass the point where it exerts the highest pressure against the line after which the mass element can continue its path towards the outer end of the support arm and the lever becomes substantially parallel to the turbine. carrying arm whereby no more stretching of the flexible material takes place and that, when the line no longer runs a detour around the angle arm on the lever, an excess of line makes the turbine wing inefficient when the flexible material is allowed to turn with the wind angle of inflow. On the end of the lever with the resulting force and the end of the angle arm, suitably mounted rollers or wheels are arranged to reduce the friction against the rope or wire. The rope or wire is with a suitable device at the main, straight end of the lever, guided by a bushing (15) which prevents the rope or wire from falling off the wheel or roller of said end when the stretching ends.
    According to an alternative design (Fig. 3) of the fastening of the ropes or wires loaded by the alternatively designed centrifugal force-dependent device, all ropes or wires are jointly connected in a suitable device (13), for example a steel plate or steel ring with fastening points for rope or wire, arranged substantially symmetrically in relation to the center of the turbine 10 15 20 25 30 35 40 45 50 55 but in the horizontal plane movable in all directions. If the turbine is designed so that its axis passes through the entire turbine height, the device must have a void in the middle of the turbine shaft and allow movement between the shaft and the inside of the device so that the device can be moved out of its symmetrical position. . Thus set up, all ropes are affected when one of the ropes loses its stretch as the common attachment moves closer to the turbine blades which still have an active stretch of the respective rope or wire, which results in the turbine wing's stretching device more easily passing the point of highest tensile degree and thus also completely loses its respective length and that an excess of line becomes available for each turbine blade. Thus, all turbine blades quickly become inefficient when a turbine blade loses its traction. The alternative stretching and attachment described above can be obtained at the desired speed, by tuning, to reduce the turbine's speed and wind vane.
    According to an alternative embodiment of the turbine, a number of battens of, for example, wood, plastic or steel are arranged at a distance from the masts, which protrude horizontally from the masts at an angle to the booms.
    The battens reduce flutter in the trailing edge of the flexible material in higher wind strengths, as after the mounting of the flexible material they end up inside the wing profile and said material is pressed against the battens by the wind. Between the respective light and attachment point on the mast there are struts of a laterally flexible material which is rigid in height. The length of the battens is between one third and half of the attached flexible material. The battens are suitably arranged so that they reach the trailing edge of the attached flexible material. The respective attachment of the slats to the mast is allowed to pivot around it in a semicircle on the side of the mast to which the boom is attached, which minimizes deformation of the surface of the flexible material under the wind pressure. No sewing or other work on the flexible material is thus required for the battens to reduce flutter at the rear edge of the flexible material. With battens mounted on the mast as above, it is advantageous to fasten the upper corner of the flexible material with two ropes or wires if the material is to be hoisted in place.
    According to a further embodiment of the turbine, a thin disk is arranged on each mast at a distance from the mast. The width of the disc is between one third and half the width of the attached flexible material. The height of the disc is between one third and eight tenths of the height of the attached flexible material. Attached with two or more struts of a laterally flexible material fulfills the same function as a number of battens, ie. to reduce flutter at the trailing edge of the flexible material. The disc is attached so that the free edge reaches the rear edge of the flexible material. The attachment points to the mast are movable laterally. The disc is made of a more or less flexible material, such as plastic or steel. With a disc mounted on the mast as above, the upper corner of the flexible material is advantageously fastened with two ropes or wires if the material is to be hoisted in place.
    权利要求:
    Claims (8)
    [1]
    A vertical wind turbine comprising a vertical turbine shaft (4) turbine blades of a flexible material with a rectangular or square surface and a number of vertical masts (3), each turbine blade being arranged at a vertical mast (3) mounted at an outer end of a horizontal support arm (5) connected to the turbine shaft (4), characterized in that the horizontal support arm (5) is connected to the turbine shaft (4) at its upper end, that the vertical mast has an upper and a lower end, that the lower end is connected to the horizontal support arm, that the upper end is free, that two booms with outer end tips are arranged in parallel and connected to the mast (1) at its upper free end and to the lower end, respectively, connected to the horizontal support arm, that the booms are substantially perpendicular to the mast (3), that the booms are perpendicular to the turbine radius, that a flexible material (2) is folded around a respective mast (3), the two insides of the material meeting at a distance from the mast s back, that each corner of the material has, for pair attachment, for rope or wire suitable attachment points, that the corners of the flexible material are attached in pairs with rope or wire in penetrations in the free ends of the parallel bars whereby the material in cross section forms a drop-shaped profile with smooth outflow, that said profile by the attachment of the flexible material with line or wire under the influence of the wind current is allowed to have a relatively large curvature when the turbine speed is low or zero, that the flexible material in its attachment is, with line or wire, connected to a centrifugal force-dependent device which, via said line or wire, stretches the flexible material and thereby straightens the profile of the turbine blade in cross section when the speed of the turbine increases.
    [2]
    Wind turbine according to Claim 1, characterized in that the upper ends of the masts are connected to one another by struts.
    [3]
    Wind turbine according to claim 1, characterized in that the turbine shaft passes through the entire height of the turbine, that horizontal support arms connect the lower ends of the masts to the turbine shaft and that horizontal support arms connect the upper ends of the masts to the turbine shaft.
    [4]
    Wind turbine according to one of Claims 1 to 3, characterized in that the centrifugal force-extending tensioning device is not fixedly connected to the ropes or wires of the fastening, said tensioning device acting on the rope or wire between the attachment points of the rope or wire on the flexible 10 by a lever The material and the fixed construction of the turbine, that the line or wire runs a detour around the stretching device already when the turbine is stationary, that with the speed of the turbine the stretch of the flexible material increases continuously to the highest degree of stretching and then completely ceases and the line or the detour of the wire around the tensioning device disappears.
    [5]
    Wind turbine according to claim 4, characterized in that ropes or wires from the respective turbine wing to be affected by the tensioning device are jointly fixed in a device with attachment points suitable for line or wire, that the device is arranged substantially symmetrically with respect to the center of the turbine and that said device is freely movable in the horizontal plane
    [6]
    Wind turbine according to one of Claims 1 to 5, characterized in that a number of battens are arranged on the masts, said battens projecting horizontally from the mast and being directed substantially at the same angle as the booms, the battens ending up inside the wing profile after mounting the flexible material. the slats are arranged with the flat side vertically, that the slats' attachments to the masts have lateral movement on the diameter of the mast (3), that the slats' attachments have rigidity in the vertical direction and that the slats' attachments are flexible in the horizontal direction.
    [7]
    Wind turbine according to any one of claims 1-5, characterized in that a flat, rectangular disc is arranged on each mast, said disc in its longitudinal direction following the length of the mast, that the disc is arranged at a distance from the mast, that the flat side of the disc is substantially aligned at the same angle as the booms, whereby the disc after mounting the flexible material ends up inside the wing profile, that the disc mounts on each mast have lateral movement on the diameter of the mast, that the disc mounts have rigidity in the vertical direction and that the disc mounts are flexible in the horizontal direction.
    [8]
    Wind turbine according to any one of claims 1-7, characterized in that the flexible material has an additional attachment point for line or wire at the upper edge and that said attachment point is arranged in the middle of the width of the material.
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    同族专利:
    公开号 | 公开日
    SE535956C2|2013-03-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1100688A|SE535956C2|2011-09-21|2011-09-21|Vertical shaft wind turbine with flexible rotor blades|SE1100688A| SE535956C2|2011-09-21|2011-09-21|Vertical shaft wind turbine with flexible rotor blades|
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