A device for a winch-operated wave-power plant
A wave energy and power station technology, applied in ocean energy power generation, engine components, machines/engines, etc., can solve the problems of unprofitability and difficulties of wave energy power stations
Inactive Publication Date: 2012-09-26
斯切米克拉夫特股份有限公司
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Problems solved by technology
This has proven difficult, and to the extent that has been successful, the resulting wave power plant is not profitable
Method used
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[0049] Conveyor system with built-in slip clutch
[0050] Figure 1a The principle of the device according to the invention is shown. The absorbing element 1 is a floating body, which is anchored by a wire 4 to a winch 2 with a cable drum 3 in such a way that when the wave force moves the absorbing element 1 in the longitudinal direction of the winch wire 4 , the cable drum Cartridge 3 is forced to rotate. The winch 2 may for example be anchored to the seabed, positioned on land or float integrally with the absorbing element 1 in the water. The energy absorbed from the waves in this way is conveyed in a rotational motion from the cable drum to the reconstruction machine 5, which converts the absorbed energy into mechanically stored energy. This mechanically stored energy may, for example, be of the form m x g x h (product of mass, gravitational acceleration and vertical height), p x V (pressure times volume) or 1 / 2 x I x ω 2 (Moment of inertia multiplied by angular rate sq...
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The invention relates to a wave-power plant where a floating buoy (1) arranges for energy absorption from the waves. The buoy is anchored by wire (4) which is reeled in on a self-tightening winch (2). When the wave motion lifts the buoy, the cable drum (3) is forced to rotate. This rotating power motion is channelled into restructuring machinery where it is converted to mechanical stored energy. The invention comprises a slip clutch between cable drum and restructuring machinery which protects the power plant and the components in the restructuring machinery against extreme loading during incidents of stormy weather. The slip clutch sets a threshold for how great a maximum output the power plant can absorb from the waves. One principle for implementing this involves allowing the slip clutch to slip if the angular velocity transmitted from the winch becomes too great. Another possibility is for the slip clutch to determine the maximum transmitted torque permitted. If the amount of output that can be absorbed from a given wave is greater than the threshold value determined by the slip clutch, the excess energy will be left in the wave due to the fact that the slip clutch slips so that the wire is pulled out without offering increased resistance, and the buoy simply drifts with the wave until the wave has passed. In addition to the said slip clutch, in one embodiment of the invention there is inserted in the wire transmission between the buoy (1) and the winch (2) a shock- absorbing spring (20) which compensates for undesirable inertia in the system at start-up, thereby protecting the wire and the rest of the system from excessively powerful jerks.
Description
Background technique [0001] In the patent literature, more than 1000 devices for harnessing the energy of ocean waves are described. It was not once recognized that successful commercial utilization of energy from ocean waves requires power stations to have one (or more) built-in or auxiliary overload protection mechanisms. However, among developers of newer wave energy systems, more and more operators are already beginning to take this fundamental factor into account: in one way or another, a power station should have Wave strategy. The traditional way of solving this problem consists in providing an extremely robust design for the power station and the components therein. This has proven to be difficult, and to the extent that has been successful, the resulting wave power plants are not profitable. Some of the newer wave energy technologies include mechanisms for overload protection as follows: Pelamis from Scottish company Ocean Power Delivery Ltd. (www.oceanpd.com), Dan...
Claims
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IPC IPC(8): F03B13/18
CPCY02E10/38F03B13/1885Y02E10/30
Inventor 因格维尔德·斯特劳梅
Owner 斯切米克拉夫特股份有限公司