RU2372519C2 - Wind power plant - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: wind power plant comprises external and internal bodies 5 and 6, generator 1 and aerodynamic drive 4 installed in the latter, drive being made in the form of two front and back screws 7 and 8 serially installed with the possibility of rotation. Internal body 6 is attached to external one with the help of two guide vanes 23 and 24. Screws 7 and 8 are arranged with the possibility of rotation into opposite directions and are connected to generator 1 via facility for transformation of rotary motion of two shafts into rotary motion of single shaft, arranged in the form of conical multiplier 13, installed in internal body 6. Guide vanes 23 and 24 are intended for spinning of air flow prior to its supply to back screw 8.

EFFECT: increased efficiency factor of plant.

3 dwg

Description

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

Known hydropower installation containing a screw connected through a gearbox to an electric current generator (see RU 2287081 C2, 10.11.2006, F03B 17/06).

The disadvantages of this scheme: low efficiency and low generator power.

The disadvantages of the invention are limited power, low efficiency of energy conversion, large dimensions of the screws and a significant level of noise created by the screws during rotation.

Known power plant containing two screws rotating in different directions, connected by shafts, respectively, with the rotor and stator of the generator. In this case, the generator stator rotates (see RU 93029865 A, 08.27.1995, F03B 13/10).

This 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 wind power installation is known, comprising external and internal bodies installed in the latter generator and an aerodynamic drive made in the form of two serially mounted rotary front and rear screws, while the internal body is attached to the external using two guide devices (see GB 2099929 A, 12/15/1982, F01D 5/02).

This installation does not provide the promotion of air flow before it is fed to the rear screw.

The objective of the invention is to increase the efficiency of the installation.

The solution to this problem was achieved due to the fact that in a wind power installation containing external and internal housings installed in the latter, a generator and an aerodynamic drive made in the form of two serially mounted rotatably front and rear screws, while the inner housing is attached to the outer using two guide vanes, according to the invention, the screws are rotatable in opposite directions and connected to the generator via means of conversion into the rotational movement of two shafts into the rotational motion of one shaft, made in the form of a conical multiplier installed in the inner casing, and the guiding devices are designed to spin the air flow before it is fed to the rear screw.

The invention is illustrated in the drawings, where

figure 1 shows the wind power plant,

figure 2 shows a section bB in figure 1,

figure 3 shows a section bb in figure 1.

The installation (figure 1) contains a generator 1 with rotating magnets 2 and an excitation winding and attached to it perpendicular to the aerodynamic drive 4, powered by the energy of the air flow. Aerodynamic drive 4 contains an outer casing 5, an inner casing 6, made streamlined. The cavity "A" inside the inner housing 6 is sealed and filled with lubricating fluid.

The aerodynamic drive 4 (Fig. 1) consists of a front and rear screw 7 and 8 mounted sequentially on the front and rear fairings 9 and 10, respectively, which are rigidly connected to the shafts 11 mounted on the bearings 12.

The means of converting the rotational motion of two shafts into the rotational motion of one shaft is made in the form of a conical multiplier 13. The screws 7 and 8 rotate in different directions during operation.

Driving bevel gears 14 and 15 of the bevel multiplier 13 are installed on the shafts 11. The driven gear 16 is mounted on the shaft 17. The shaft 17 is connected to the shaft 19 of the generator 1 using the coupling 18. The shaft 17 is installed inside the protective casing 20. The ribs 21 are welded to the protective casing 20 The generator 1 is installed on the base plate 22. The inner housing 6 is attached to the outer housing 5 using guide devices 23 and 24 (FIGS. 2 and 3), designed to unwind the air flow before it is fed to the rear screw 8. This further increases the efficiency of the installation . At the entrance to the aerodynamic drive 4, a protective grill 25 is installed, which prevents the ingress of foreign objects on the screws 7 and 8, ensuring safe operation. Wires 26 are output to the consumer.

The use of such a scheme will reduce the diametrical dimensions of screws 7 and 8, increase their efficiency, reduce the installation diameter by almost 1.5 times and reduce the noise level created by screws 7 and 8.

Before operation, the installation is carried out.

The generator 1 is mounted above the surface of the earth.

During operation of the installation, it is installed in the area of intense and constant winds. The air flow drives the aerodynamic drive 2 (Fig. 1), i.e. screws 7 and 8 through the means of converting rotational motion (conical multiplier 13), and the shaft 17 drives the shaft 19 of the generator 1. The generated electrical energy is supplied through electric wires to energy consumers via wires 26.

The presence of a protective casing 20 ensures safe operation and, in addition, unloads the shaft 17 from bending loads. For this purpose, ribs 21 are intended.

The protective grill 25 prevents foreign objects from entering the unit, which also increases its reliability and ensures safety.

The streamlined shape of buildings 5 and 6 further increases the efficiency of the installation and its power. The outer casing 5 prevents radial flow of air under the action of centrifugal forces and increases the efficiency of the installation.

The application of the invention will allow:

1. Ensure high installation efficiency through the use of two screws.

2. To get more power through the use of screws of the largest possible diameter so that the maximum air flow passes through it, the use of the maximum angular rotational speed of the screws from the strength conditions, the use of a conical multiplier so that the generator, having the smallest dimensions, has the maximum power.

3. Ensure that the noise level generated by the screws is reduced through the use of a fairing.

4. Ensure maintenance of the generator, made separately from the aerodynamic drive and carried a considerable distance from it using the shaft 17.

5. Ensure the safe operation of the device.

Claims (1)

A wind power installation comprising external and internal bodies installed in the latter generator and an aerodynamic drive made in the form of two successively mounted front and rear screws rotatable, while the internal body is attached to the external using two guide vanes, characterized in that the screws made with the possibility of rotation in opposite directions and connected to the generator through means for converting the rotational motion of two shafts into rotational motion one shaft, made in the form of a conical multiplier installed in the inner case, and the guiding devices are designed to unwind the air flow before it is fed to the rear screw.

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