A device for converting energy of a fluid flow into useful work

 

(57) Abstract:

Usage: in the hydropower industry. The inventive blades are made in the form of a wing-shaped sections connected between a bearing element. The blades are parallel to each other with the possibility of changing the angle of attack and rotation in the horizontal plane. The bearing element is designed as a cable with clips for connection with the blades. The blades are equipped with tail stabilizers and synchronizing thread associated with their end sections. The cable is connected with the energy Converter and through the elastic element is supported. The cable combined with an electric cable. Support made in the form of watercraft. 8 C. p. F.-ly, 3 ill.

The invention relates to hydropower and wind and can be used to convert flow energy into useful work, for example, in the open sea currents.

Known methods and devices in which the working body is the blade or blades, placed in a rigid supporting structure at different levels in parallel to each other. When interacting with the flow oscillations are excited blades used to produce useful work (see naprimer mode caused by the desire to reduce dynamic loads, typical of many known designs with blades, rotating or circulating around the axis directed along or across the stream. Analogue of the invention is a hydroelectric unit ed. St. USSR N 1150392 containing hollow body and set it to the grid of the operating plates rigidly mounted on the trailing edges and covered with a piezoelectric film, which generates electricity.

Realized the power of this and the above units is limited to large hydro-mechanical loads on the rigid body and, as a consequence, significant material.

The prototype of the invention are a method and a device for its implementation (U.S. patent N 4347036, CL F 03 D 5/06, publ. 1982), in which the kinetic energy of the flow is converted into useful work by using supports, set of blades, made in the form of a thin wing-shaped profile, interconnected by means of a bearing element, while the blades are parallel to each other with the possibility of changing the angle of attack and rotation in the horizontal plane, and the energy Converter with an electric cable.

The disadvantage of the prototype is the OTF is a result of this, substantial consumption of a rigid supporting structure. In addition, it is difficult technically to place the power Converter near the blade, i.e. in the stream.

The technical result of the proposed device is the implementation of more power and reduced material consumption.

The claimed technical result is achieved in that the bearing body in the form of a cable with clips for connection with the blades, the latter is provided with a tail stabilizers and synchronizing thread associated with their end sections so that the cable is connected with the energy Converter and through the elastic element is supported. Bearing with the roller unit is made in the form of watercraft. Blade clamps placed before the General center of mass of the blades and the tail fin (including attached weight environment). Tail the tail is installed with an angle of attack greater than the angle of attack vane.

Part of each blade is made with positive buoyancy, and the remaining negative for the vertical orientation of each blade along the span.

In Fig. 1 shows a device with vertical suspension cable and a support in the form of the craft of Fig. 2 ustroystve.prilozhenie suspension cable and support, installed on the shore.

In Fig. 1, the system of the blades 1 are connected to the carrier cable 2 by means of clamps 3, which allows the blades to rotate in a horizontal plane towards the flow and be rejected by the angles of attack. The clamps 3 are located in the General center of mass of the blade 1. Each blade has a tail stabilizer 4 to rotate towards the flow. The stabilizer 4 is installed with an angle of attack greater than the angle of attack of the blade 1 to its correct orientation by angle of attack. Synphasicity joint deviations of the blade 1 by the angle of attack is provided (with a small distance between the blades) synchronizing thread 5 connecting the tail fins 4. The system of the blades 1 are distributed over the depth of the cross-stream (formed catenary curve) using the load 6 and the floating means 7, which is wound up by the suspension cable 2 through the roller unit 8. Suspension cable 2 is kinematically connected with the shaft 9 PTO and item 10 of elasticity, mounted on a floating facility.

In Fig. 2 system of blades 1 with stabilizers 4 are connected by a cable 2 by means of clamps 3. The location of the system across the stream is provided by pritoplennye buoy 11 and armature 12, which zavodytsya with the shaft 9 PTO and item 10 of elasticity. In Fig. 3, the system of the blades 1 with stabilizers 4 are connected to the carrier cable 2 by means of clamps 3 and stretched horizontally across the flow through the normal hydrodynamic of Ammodytes 13. The blade 1 is oriented vertically along the span, as their upper part is made with positive buoyancy, and the bottom negative. The end of the suspension cable 2 is wound up on the shore, where kinematically associated with the shaft 9 PTO and item 10 of elasticity.

The work of the proposed device is described using, for example, Fig. 1 and is based on the classical theory of Flutter. As is known, the condition for the excitation flutter flutter of wing-shaped profile (implemented in this device) is the profile of two degrees of freedom: oscillating perpendicular to the flow and rotational around the clip. Variations on these degrees of freedom are interrelated and are carried out with a constant phase shift. The behavior of each blade is similar to the rotating motion of the wing of a bird. Under certain system parameters and exceeding the critical flow rate is excited flutter, the kinetic energy is absorbed from the stream using the catenate and part of it is used to perform useful servant of the Oia cable synchronize their oscillations. If the blades are too close (chord length) or are in the flow with heterogeneous speeds, also used the sync thread linking the ends of the tail stabilizers.

The use of the invention will in the slow river and sea currents (including tidal) to get low-cost electricity without large start-up cost, no significant ecological disturbance in areas where other known devices are not applicable.

1. A DEVICE FOR CONVERTING energy of a FLUID FLOW INTO USEFUL WORK, containing a support, a set of blades, made in the form of a wing-shaped profile, interconnected by means of a bearing element, while the blades are parallel to one another with the possibility of changing the angle of attack and rotation in the horizontal plane, and the energy Converter with an electric cable, characterized in that the carrier element is designed in the form of a cable with clips for connection with the blades, the latter is provided with a tail stabilizers and synchronizing thread associated with their end sections, when this cable is connected with the energy Converter and through the elastic element is supported.

4. The device under item 1, characterized in that the support is executed in the form of an anchor.

5. The device under item 1, characterized in that the bearing is installed on the shore.

6. The device under item 1, characterized in that the support is fixed roller block, over which hung a rope.

7. The device under item 1, characterized in that the blade clamps are to the General center of mass of the blades and the tail fin.

8. The device under item 1, characterized in that the portion of the blades are made with positive buoyancy, and the remaining negative.

9. The device under item 1, characterized in that the tail stabilizer set with angle of attack, a large angle of attack vane.

 

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