Generator operating at sea current

FIELD: power engineering.

SUBSTANCE: invention is related to designs of plants for transformation of sea current energy into electric energy. Generator that operates at sea current comprises cylindrical jacket 19 with inlet and outlet nozzles 20 and 21, two power generators 1 installed parallel to each other with cylindrical body 3 and external rotor 4, installed outside body 3, and hydrodynamic drive 2, made in the form of blades 9, which are radially installed on external surface of external rotors 4 in both power generators 1. Power generators 1 are arranged as birotating and are equipped with internal rotor 5, installed inside body 3. Internal and external rotors 4 and 5 are connected to each other by means of reduction gear 12, cavity of which is filled with lubricating liquid, which provides for opposite rotation of rotors 4 and 5, and blades 9 are arranged as flat.

EFFECT: invention is aimed at higher efficiency factor of plant with reduction of its dimensions and simultaneous increase of power.

2 cl, 2 dwg


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

Known hydropower plant with two screws rotating in different directions, connected by shafts respectively with the rotor and stator of the generator (see EN 93029865 AND 27.08.1995).

In this installation the stator of the generator rotates, which is a big drawback, since the stator must be placed in a fixed case designed for attachment to a support and output wires.

Known generator operating at sea for containing a cylindrical casing with inlet and outlet nozzles that are installed parallel to each other two generator with a cylindrical body and an outer rotor mounted outside the housing, and a hydrodynamic drive, made in the form of blades radially mounted on the outer surface of the outer rotors of both generators (see DE 102005040806 A1, 08.03.2007, prototype)

The disadvantages of this generator are low efficiency, large size and low power. With increasing Diametric size of the device in General, the weight increases in proportion to the square of the diameter, and the excessive increase in the length irrational for technological reasons, the conditions of transportation and operation.

The task of the invention is to increase efficiency with the reduction of its size and increase in power.

The claimed technical result is achieved due to the fact that the generator is operating at sea for containing a cylindrical casing with inlet and outlet nozzles that are installed parallel to each other two generator with a cylindrical body and an outer rotor mounted outside the housing, and a hydrodynamic drive, made in the form of blades radially mounted on the outer surface of the outer rotors of both generators, according to the invention generators made birotational and has an internal rotor located inside the housing, with the inner and outer rotors are interconnected via a gearbox, the cavity of which is filled with lubricating fluid, providing the opposite rotation of the rotors, and the blades are made flat.

In addition, cavity generators sealed, filled with lubricating fluid and connected to the compensator pressure.

The invention is illustrated by figure 1 and 2, where:

figure 1 shows a diagram of an alternative source of energy;

figure 2 - section a-a in figure 1.

A generator that runs on sea current (figure 1), contains two generator 1, installed in parallel and at the same time with them hydrodynamic drives 2, running on the energy of water. Both generator 1 is the 2 drives have the same structure and contain cylindrical body 3, the outer rotor 4 and the inner rotor 5 mounted respectively inside and outside the cylindrical body 3 concentric with him. The generator 1 includes a field winding 6, is made within the cylindrical body 3, and the outer magnets 7 and the inner magnet 8 mounted respectively in the outer and inner rotors 4 and 5.

Hydrodynamic drive 2 (figure 1) consists of flat blades 9 mounted on the external surface of the outer rotor 4 along its axis.

The rotors 4 and 5 are installed on the housing 3 on the bearings 10 and is sealed with a seal 11. Cavity "B" and "C" of the generator 1 is filled with lubricating fluid.

The inner rotor 5 is connected to the outer rotor 4 through the gear 12, which contains the driven gear 13 that engages with the outer rotor 4, the intermediate gear 14, mounted on the shaft 15 and the pinion gear 16 that is connected with the inner rotor 5. The cavity of the gear 12 filled with lubricating fluid.

The application of this scheme will reduce the diametrical dimensions of the generator 1, to increase its efficiency and reduce the diameter of the installation several times. While the plant capacity can be increased at the expense of its axial size.

To the housing 3 of the generator 1 (Fig 1 and 2) ribs 17 are attached bearing 18.

The generator 1 and drive 2 are enclosed in a cylindrical casing 19, to the which has a common inlet pipe 20 and a common outlet 21 (Fig 3). With the cavity "B" channel "D" connected to the cavity of the pressure compensator 22, which is installed inside the spring-loaded piston 23. Hole "E" reports the cavity pressure compensator 22 with the environment.

During operation of the installation it is set in the area of permanent water flow. The flow of water passes through the common inlet pipe 20 and actuates the hydraulic actuator 2 (Fig 1), acting on the flat of the blade 9.

The inner rotor through the gear 12 rotates in the opposite direction. This will increase the rate of change of magnetic flux passing through the coil (winding) excitation 6 of the generator 1. The magnetic field crosses the field winding 6 and occurs EDS. Produced electrical energy is supplied by electrical wires to the energy consumers (figure 1, 2 circuit output wires not shown).

The casing 19 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 ensure high efficiency through the use of birotational circuit of the generator, i.e. the rotation of the two rotors in opposite directions.

2. To get more power due to the large axial length of the device, while it passes through the maximum flow of water. More power generator mo is but to get without increasing its Diametric dimensions and a significant increase in weight and centrifugal loads. The use of parallel two generators allows you to double the power and to use a common gearbox.

3. To reduce the diametrical dimensions of the generator through the use of birotational schema.

4. To simplify the design of the device as a whole by combining basic units: electric and hydrodynamic drive and reduce the number of parts.

5. To reduce the level of noise generated by the device during operation through the use of casing.

6. To ensure the unit is mounted on the bottom of the ocean at any depth through the application of pressure compensator.

1. Generator operating at sea for containing a cylindrical casing with inlet and outlet nozzles that are installed parallel to each other two generator with a cylindrical body and an outer rotor mounted outside the housing, and a hydrodynamic drive, made in the form of blades radially mounted on the outer surface of the outer rotors of both generators, characterized in that the generators are made birotational and has an internal rotor located inside the housing, with the inner and outer rotors are interconnected via a gearbox, the cavity of which is filled with lubricating fluid, providing the opposite rotation of rotora is, and the blades are made flat.

2. The generator according to claim 1, characterized in that the cavity generators sealed, filled with lubricating liquid and communicated with joints pressure.


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