RU2368799C1 - Generator operating at sea current - Google Patents

Abstract

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

Description

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

Known hydropower installation containing two screws rotating in opposite directions, connected by shafts respectively to the rotor and stator of the generator (see RU 93029865 A, 08.27.1995).

In this installation, the generator stator rotates, which is a big disadvantage, because the stator must be placed in a fixed housing designed for mounting to a support and the output of electrical wires.

A known generator operating on the sea current, comprising a cylindrical casing with inlet and outlet nozzles, two electric generators installed in parallel with each other with a cylindrical housing and an external rotor mounted outside the housing, and a hydrodynamic drive made in the form of blades radially mounted on the outer surface of the external rotors both electric generators (see DE 102005040806 A1, 03/08/2007, prototype).

The disadvantages of this generator are low efficiency, large dimensions and low power. With an increase in the diametrical dimensions of the device as a whole, its weight increases in proportion to the square of the diameter, and an excessive increase in length is irrational for technological reasons, conditions of transportation and operation.

The objective of the invention is to increase the efficiency of the installation while reducing its dimensions and at the same time increasing the power.

The claimed technical result is achieved due to the fact that in the generator operating on the sea current, containing a cylindrical casing with inlet and outlet pipes, two electric generators installed in parallel with each other with a cylindrical casing and an external rotor mounted outside the casing, and a hydrodynamic drive made in the form blades radially mounted on the outer surface of the outer rotors of both electric generators, according to the invention, the electric generators are made biotative and equipped with an internal they rotor disposed within the housing, wherein the inner and outer rotors interconnected by a gearbox, which cavity is filled with a lubricating fluid, providing the opposite rotation of the rotors, and the blades are flat.

In addition, the cavities of the electric generators are sealed, filled with lubricating fluid and communicate with pressure compensators.

The invention is illustrated in figures 1 and 2, where:

figure 1 shows a diagram of an alternative energy source;

figure 2 is a section aa in figure 1.

A generator operating on the sea current (Fig. 1) contains two electric generators 1 installed in parallel, and hydrodynamic drives 2 operating at the same time as they are powered by water energy. Both electric generators 1 with actuators 2 have the same design and contain a cylindrical body 3, an external rotor 4 and an internal rotor 5 mounted respectively outside and inside the cylindrical body 3 concentrically to it. The generator 1 contains an excitation winding 6, made inside the cylindrical body 3, and external magnets 7 and internal magnets 8 mounted respectively on the outer and inner rotors 4 and 5.

The hydrodynamic actuator 2 (Fig. 1) consists of flat blades 9 mounted on the outer surface of the outer rotor 4 along its axis.

The rotors 4 and 5 are mounted on the housing 3 on bearings 10 and sealed with seals 11. The cavities “B” and “C” of the electric generator 1 are filled with a lubricating fluid.

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

The use of such a scheme will reduce the diametrical dimensions of the generator 1, increase its efficiency and reduce the diameter of the installation several times. In this case, the power of the installation can be increased due to its axial dimensions.

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

The generator 1 with the drive 2 is enclosed in a cylindrical casing 19, which has a common inlet pipe 20 and a common output pipe 21 (Fig.3). Channel “D” is connected to the cavity “B” by the cavity of the pressure compensator 22, inside of which a spring-loaded piston 23 is installed. The hole “E” communicates the cavity of the pressure compensator 22 with the environment.

During operation of the installation, it is installed in the area of constant flow of water. The flow of water passes through a common inlet pipe 20 and drives a hydrodynamic drive 2 (Fig. 1), acting on flat blades 9.

The internal rotor through the gearbox 12 rotates in the opposite direction. This will increase the rate of change of the magnetic flux passing through the windings (winding) of the excitation 6 of the generator 1. The magnetic field crosses the excitation windings 6 and an EMF appears in them. The generated electrical energy is supplied through electric wires to energy consumers (in Figs. 1, 2, the wire output circuit is not shown).

The casing 19 prevents radial flow of water under the action of centrifugal forces and increases the efficiency of the installation.

The application of the invention will allow:

1. To ensure a high efficiency of the installation due to the use of a birotative circuit of an electric generator, i.e. rotation of two rotors in opposite directions.

2. Get more power due to the large axial length of the device, while the maximum water flow passes through it. A large power generator can be obtained without increasing its diametrical dimensions and a significant increase in weight and centrifugal loads. The use of two parallel electric generators allows you to double power and use a common gearbox.

3. To reduce the diametrical dimensions of the electric generator through the use of a birotative scheme.

4. To simplify the design of the device as a whole by combining the main components: an electric generator and a hydrodynamic drive and reducing the number of parts.

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

6. Ensure the installation of the device on the ocean floor at any depth through the use of a pressure compensator.

Claims (2)

1. The generator operating on the sea current, comprising a cylindrical casing with inlet and outlet nozzles, two electric generators installed in parallel with each other with a cylindrical housing and an external rotor mounted outside the housing, and a hydrodynamic drive made in the form of blades radially mounted on the outer surface of the external rotors of both electric generators, characterized in that the electric generators are made biotative and equipped with an internal rotor located inside the housing, while the internal and External Expansion rotors interconnected by a gearbox, which cavity is filled with a lubricating fluid, providing the opposite rotation of the rotors, and the blades are flat. 2. The generator according to claim 1, characterized in that the cavity of the electric generators are sealed, filled with lubricating fluid and communicate with pressure compensators.

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