Hydropower installation

FIELD: mechanical engineering.

SUBSTANCE: invention relates to structures of installations for energy conversion of water course of airflow into electrical power. Hydropower installation contains generator 1 and hydrodynamic drive 4, implemented in the form of two sequentially installed screws 7 and 8, implemented with rotation ability into side opposite and connected to generator 1 through conversion facility of rotational movement of two shafts into rotational movement of one shaft, implemented in the form of conic step-up gear 13, installed in inner body 6. Inner body 6 is affixed to external body 5 by means of two wicket gates 23 and 24, provided for spinning of water flow before its supplying to the back screw 8.

EFFECT: invention is directed to increasing of coefficient of efficiency of installation ensured by increasing of back screw coefficient of efficiency.

3 dwg

 

The invention relates to structures for converting the energy of the incoming flow of water into electrical energy.

Known hydropower plant (see EN 93029865 AND 27.08.1985, F03B 13/12)with two screws rotating in different directions, connected by shafts respectively with the rotor and stator of the generator. While the stator of the generator is rotated. This is a big drawback, since the stator must be placed in a fixed case designed for attachment to a support and output wires. In addition, the rotor, the stator and the screws rotate with the same angular velocity. If you design a high-speed generator having a rotational speed, for example, 3000...10000 rpm, to design a propeller with a diameter of more than 1 m will fail for reasons of strength, due to the large centrifugal loads.

For example, when n=10 000 Rev/min and D=1 m/s

the speed of rotation of the rotor at the periphery will be

that is, nearly 2 times the speed of sound in air and is comparable to the speed of propagation of sound in water and is not permissible under the terms of strength.

For industrial generators for maximum power, you must have the screws with a diameter of 5...10 m and more. In this case, the rotation speed of the screws should not exceed 50 rpm, i.e. you need to install the cartoon is of plicator, increase the speed of the rotors 10...20 times. In addition, preferably the stator of the generator to perform not rotating.

Known hydropower plant comprising a generator, a guiding apparatus and a hydrodynamic drive, made in the form of two series set screws, are made to rotate in opposite directions and connected to the generator through the means of converting rotational motion between two shafts into a rotary movement of one shaft, made in the form of a conical multiplier that is installed in the inner case, with the guide device is designed to promote the flow of water before it is fed to the rear screw (see SU 1280178 A1, 30.12.1986, F03B 13/10).

A disadvantage of the known installation is a single guide vane installed before the second screw, three poles, one at the top of the device and two at the bottom.

The objective of the invention to increase the efficiency of the plant by increasing the efficiency of the rear screw through the promotion of water flow at the exit from the front of the screw, the direction of the optimal flow of water at the entrance of the rear screw.

The invention is illustrated by drawings, in which

figure 1 shows a hydropower plant,

figure 2 - a section B-B in figure 1,

figure 3 - section b-b In figure 1.

Install the CA (figure 1) contains the generator 1 with rotating magnets 2, the excitation winding and connected perpendicularly to the hydraulic actuator 4, running on the energy of the water flow. Hydrodynamic drive 4 includes an outer housing 5 and the inner case 6 made a streamlined shape. The cavity "A" inside the inner case 6 is sealed and filled with lubricating fluid.

Hydrodynamic drive 4 (figure 1) consists of a set consistently front and rear screws 7 and 8 respectively on the front and rear fairings 9 and 10, which are rigidly connected with the shaft 11 mounted in bearings 12.

A tool to convert rotational motion between two shafts into a rotary movement of a shaft made in the form of a conical multiplier 13. The screws 7 and 8 at work revolve in different directions.

On the shafts 11 are installed leading bevel gears 14 and 15 are tapered multiplier 13. Driven gear 16 mounted on shaft 17. The shaft 17 through the clutch 18 is connected to the shaft 19. The shaft 17 is mounted inside a protective casing 20. To the protective cover 20 is welded to the ribs 21. The generator 1 is installed on the base plate 22. The inner case 6 is attached to the outer housing 5 by means of guide vanes 23 and 24 (figure 2 and 3)designed to promote the flow of water before it is fed to the rear screw 8, which will allow more effective compared to one napravlyayus the apparatus, to promote the flow of water in front of the rear screw. This increases the efficiency of the installation. At the entrance to the hydraulic actuator 4 is installed protective grille 25, preventing ingress of foreign objects on the screws 7 and 8, and ensures the safety of operation. Wire 26 displayed on the surface of the water to the consumer.

The application of this scheme will reduce the diametrical dimensions of the screws 7 and 8, to increase their efficiency, to reduce the diameter of the installation is almost 1.5 times and reduce the level of noise generated by the screws 7 and 8.

Before operating, perform the installation. Thus there are two possible ways of installation. The first option (figure 1) provides for the installation of the generator 1 at the bottom of the reservoir through the support plate 22.

The second option generator 1 is fixed on the surface of the water on the platform, and a hydrodynamic drive is installed under water. This gives a significant advantage: the generator can be maintained, not sinking under the water, and it is easier to bring the wires 26 and to connect them with consumers energy.

During operation of the installation it is set in the area of permanent water flow. The water flow actuates the hydraulic actuator 4 (figure 1), i.e. the screws 7 and 8 through the means of converting rotational motion (conical multiplier 13, and the shaft 17 drives the generator shaft 19. Generated electricity is chechetka energy is supplied by electrical wires to the consumers of energy through the wires 26.

The presence of the protective casing 20 provides safe operation and, in addition, facilitates the shaft 17 from bending loads. For this purpose the ribs 21.

Protective grille 25 prevents the ingress of foreign objects and fish inside the unit, which also increases its reliability and security.

The streamlined shape of the housings 5 and 6 additionally increases the efficiency of the plant and its capacity. The outer casing 5 prevents radial flow of water under the action of centrifugal forces and increases the efficiency of the installation.

The use of the invention will:

1. To promote the flow of water at the outlet of the first screw.

2. Send in an optimal way the flow of water to the rear entrance of the screw.

3. To significantly increase the efficiency of the rear propeller, and consequently, the efficiency of the installation as a whole.

4. To get more power through the use of screws maximum possible diameter in order that through them passed the maximum consumption of water, use the maximum angular velocity of rotation of the screws from the condition of strength, the use of conical multiplier to an electric generator, having minimum dimensions, maximum power.

5. Reduce noise by screws, through the use of the fairing.

6. To facilitate the maintenance performed separately from the guide is dinamicheskogo drive and separated from it by a considerable distance through the shaft 17.

7. To ensure safe operation of the device.

Hydropower plant comprising a generator and a hydrodynamic drive, made in the form of two series set screws, are made to rotate in opposite directions and connected to the generator through the means of converting rotational motion between two shafts into a rotary movement of one shaft, made in the form of a conical multiplier that is installed in the internal housing, wherein the inner housing is attached to the outer housing by means of two guide vanes that are designed to promote the flow of water before it is fed to the rear screw.



 

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2 dwg

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1 dwg

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