Device for tidal power plants

FIELD: power engineering.

SUBSTANCE: invention relates to tidal power stations. Device (1) for the tidal power station contains at least one underwater sail (14), essential construction (2, 4) and at least one transmitting element (10). The underwater sail (14) connected with the transmitting element (10) can move between two storage devices (18). When the sail is in the storage devices, it is not connected with the transmitting device.

EFFECT: reduction in the cost of producing electric energy, reduction in the operational problems and increase in efficiency.

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The present invention relates to a tidal power station. More specifically, it relates to a tidal power plant, in which the so-called underwater sail moves due to the tide between the two stores, namely from the first store to the second store, when called by the tide for has a first direction and in the opposite direction, when called by the tide for a second direction.

In this context, the term "store" refers to the place where preferably there are several sails, when the tidal current changes direction. The sail may be of any shape, allowing him to navigate the tidal current.

Tide water is a natural source of energy, which, by and large, are not used. Tidal currents are observed in many regions around the world, and with their help we could get a relatively large number of renewable energy, if you had the proper equipment.

The most famous tidal power station based on tidal current from one reservoir through a turbine to another reservoir, located on the lower level. Alternatively, the turbine is fitted directly into the tidal stream.

A device that contains a lot of underwater wings, us is set out along the pair of endless belts, covering wheels that can rotate in opposite directions. For example, in the patent application in the UK No. 2131491 described a device in which the wings are symmetrical cross-section and fixed between the two belts so that their axes are parallel to these belts.

In U.S. patent No. 1522820 described a similar device, but with many blades that rotate between an active open position when they are moved over the water, and an inactive folded position when they are moved against the current. The device operation is based on the fact that the fluid flows in one direction relative to the plant, and therefore it is not suitable for use as a tidal power station.

In European patent application No. 0135748 described a device in which the belts pass between the deflecting rollers at right angles to the direction of flow, and pivotally suspended on straps underwater wings cause the belt to rotate the deflecting rollers, when the fluid flows past the wing.

Common to the known technical solution is that the underwater wings or vanes attached rigidly or pivotally, to the belt elements covering at least two deflecting roller. It turned out that the known devices have one or more disadvantages, such as consider what Ino the high cost of the electricity produced, operational problems or limited effectiveness.

The aim of the invention is to eliminate or reduce at least one of the disadvantages of known devices.

This goal is achieved through the characteristics listed below in the description and claims.

The invention is implemented with at least one underwater sail, moving between the two stores.

Underwater sail essentially stationary on the trajectory of its movement, when the tide changes direction. When the tide flows in the first direction, the sail moves along the path in the direction from the first store to the second. The sail can reach the end of its trajectory before will change the direction of tidal currents, or he may stop in an intermediate position on the trajectory. When the tide comes in an opposite, second direction, the sail moves along the path back from the second store to the first.

Energy can be obtained by reducing the speed of the sails relative to the speed of the tidal current. Calculations show that good efficiency can be achieved when the speed of the sails is about one third the speed of the current.

In one embodiment of the invention the set of the sails is connected with the belt elements, hereinafter called remand the mi cables, which move between two reversing pulleys. Belt cables form the trajectory of the sail. In the initial position, the sails are assembled together in the first store. When the tidal current has a first direction, it pulls from the first store first sail, which is connected with a belt ropes and forces them to move around reversing pulleys.

After the first sail was some distance along its trajectory, tidal current pulls the second sail, which also connects with the belt ropes. Then from the first store consistently stretch the following sails, which are connected with a belt ropes and pull them together with the previously released from the store sails.

Sails move along its trajectory as long as there is a second store, or will not decrease the strength of tidal currents. When the direction of the tidal current is reversed sails likewise will move from the second store to the first.

The device according to the invention it is advisable to place at these depths, where it will not impede navigation. A tidal power plant is relatively easy to install, and its dimensions can be chosen so as to provide maximum efficiency at the installation site. Sails may have a square is up to several hundred square meters.

The device preferably contains a sufficient number of sails, that they filled the trajectory of their movement, and the speed of the tidal current should be sufficient to move the sails.

Alternative embodiments of the tidal power plant can contain, for example, individual guides and belt cables, or perhaps the trajectory of the sail can be on the seabed or in addition associated with the vessel. Sails can be made so that they are attached to different parts of the belt cables depending on the direction in which the moving sails. In this case, the reversing pulleys will rotate in the same direction regardless of which direction move the sails.

Below described are not limiting the invention an example of the preferred variants of its implementation with reference to the drawings, where:

figure 1 depicts a perspective view of a tidal power plant according to the invention;

figure 2 depicts a side view, on which several sails are moving along its trajectory, and from the first store are new sails. Arrows indicate the direction of water flow;

figure 3 depicts a view similar to figure 2, but where the majority of the sails moved to the second store;

figure 4 depicts a view similar to figure 2, but where he changed the direction of the tidal current, and couples the sa begin to move from the second store;

figure 5 schematically depicts a locking device sails on an enlarged scale and

6 depicts a top view of a sail on a larger scale.

In the drawings, the position 1 labeled tidal power plant, containing the first cage 2 and the second shaft 4. Stands 2, 4 are installed on the seabed 6 and stabilized by braces 8.

Four belt element 10 in the form of a belt ropes loosely cover the reversing pulleys 12 between the stands 2, 4 (see figure 2). Belt cables 10 are pre-tension and therefore worn tightly.

Tidal power plant 1 contains sails 14, with the corners of the guides 16 (see figure 5). In the inactive position the guides 16 can be moved along the respective belt cables 10. When the sail 14 is assembled to the first store 18 in the first stand 2 or the second store 20 in the second cage 4, belt cables can essentially move freely in the guides 16.

Each sail 14 is essentially impervious surface, which fills the cross-section of the belt between the cables 10. In the depicted embodiment, the invention sails 14 consist of two parts and have a vertical hinge axis 22 around which can to a limited degree turn both halves of the sail 14 relative to each other.

When the sail 14 is effective tidal current, hereafter the Chennai arrows in Fig.6, the two halves of the sail slightly rotated, giving it the shape of the letter V with a great solution. While the guides 16 sails 14, due to their inclination relative to the belt of the cable 10, capture the appropriate belt cables 10 and pulling them.

Guides 16 can be equipped with additional clamps (not shown).

Each sail 14 is equipped with a shut-off device 24 in the form of a locking shoulder, designed for fastening the sail 14 to the adjacent sail 14 (see figure 5). The stop shoulder 24 are released when the tension of the rope spacers 26 between adjacent sail 14. The length of the spacer rope 26 determines the distance that the sails 14 may deviate from each other.

Figure 2 multiple sails 14 out of the first store 18 and pull the belt cables 10. Sails 14 remaining in the first shop 18, can't get out of it, as held stop shoulders 24. Figure 5 spacer cable 26 leading to the front of the sail 14' in the first shop 18, is in the process of tightening, and releases the locking shoulder 24 for the sails 14' due to the rotation of the shoulder 24 around its axis of suspension (not shown). This allows the sail 14' to exit first store 18 and grab the rope belt 10.

Then the sails 14 sequentially move from the first store 18 to the second store 20. As tidal those who tell moves the sails 14, 14', the sails 14, which passed the distance between the stands 2, 4, are accumulated in the second store 20.

When the tidal current reverses direction, the sails 14, 14' in a similar way out of the second store 20 and moved in the opposite direction to the first store 18 and pulling the belt cables 10.

In the reversing pulleys 12 rotate in different directions depending on the direction of the tidal current. One or more of the reversing pulley 12 is connected to an electric generator (not shown).

1. The device (1) for tidal power station containing at least one underwater sail (14, 14'), design (2, 4) and at least one transmission element (10), characterized in that at least one underwater sail (14, 14')when it is connected with the drive element (10)can move between the two stores (18, 20), and when the sail is kept in the shops, it is not connected to the drive element (10).

2. Device for tidal power station, containing the first stand (2) and second section (4), at least one belt element (10), covering the reversing pulley (12) and the cage (2, 4) and at least one underwater sail (14, 14'), characterized in that at least one sail (14, 14') has an active position in which it is connected to the belt element (10) and an inactive position, in which he, essentially, is free to move relative to the belt element (10).

3. The device according to claim 2, characterized in that the sail (14, 14') is connected with a belt element (10) at least one locking groove (16).

4. The device according to claim 2, characterized in that the sail (14, 14') is provided with a hinge axis (22).

5. The device according to claim 1, characterized in that the sails (14, 14') in its initial position is located at the first store (18).

6. The device according to claim 5, characterized in that the sails (14, 14') out of the first store (18) or the second store (20) sequentially.

7. The device according to claim 6, characterized in that the distance between the sail (14, 14') at the output is determined by the length of the spacer rope (26).

8. The device according to claim 6, characterized in that adjacent sails (14, 14')when they are in the store (18, 20)are connected to each other by a locking device (24).

9. The device according to claim 6, characterized in that the spacer rope (26) are made so that when the tension disables the shut-off device (24)associated with two adjacent sails (14, 14').
Priority items:

08.12.2003 according to claims 1, 2, 5, and 6;

10.08.2004 on p, 4, 7-9.



 

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