RU2563055C2 - Wind power station with two pairs of wind drives of propeller type - Google Patents

Abstract

FIELD: power industry.

SUBSTANCE: invention relates to wind power engineering, namely to wind power stations. A wind power station includes a supporting structure with a reinforced-concrete foundation, a fixed tower in the upper part of the supporting structure with wind drives of a propeller type, which are mutually perpendicular to each other. Wind drives of the propeller type are connected through free-wheel clutches with a reduction gear unit common for them. Working rotation of each pair of wind drives is mutually opposite. Rotation zones of each pair of wind drives are made so that possibility of their mutual intersection is excluded. With that, one of two mutually perpendicular axes of the wind drives is located in predominant wind direction in this locality.

EFFECT: invention is aimed at more complete use of energy of a wind flow and improvement of generated power.

2 cl, 1 dwg

Description

The invention relates to the field of wind energy, in particular to wind power stations, as the most environmentally friendly sources of energy.

Numerous designs of wind power stations (WPPs) are known, containing a propeller-type wind drive that converts the energy of the wind flow into the mechanical energy of rotation of the rotor of an electric generator of direct or alternating current and an additional battery to power consumers in the absence of wind [1, 2, 3].

Known for the original design of a wind drive with a smooth change in the "angle of attack" of a planar-type wind wheel [4].

A known design of a combined type wind farm containing two wind drives, one of which rotates the generator rotor through an overrunning clutch under the influence of the wind flow, the second is also made with the possibility of rotation of the same generator rotor, but under the influence of differential pressure in vertically erected pipes or exhaust ducts of multi-storey buildings and structures converted by a propeller-type wind turbine into mechanical energy [5].

Known designs of wind drives, containing two propeller-type wind drives with different directions of rotation under the action of the same air flow [6].

A common drawback of these types of wind farms is the dependence of their work on the presence of wind and the relatively small generated power.

As a prototype, we consider the design of a wind drive containing two propeller-type wind drives made with the possibility of their rotation in the horizontal plane using a weather vane together with a tower located in the upper part of the support structure of the wind farm [6].

A distinctive feature of this design is the use of two propeller-type wind drives that rotate under the influence of the wind flow in opposite directions to increase the wind farm power. The latter is provided with an appropriate choice of the angle of attack of one of the wind drives. According to the authors, this design increases the generated power of the wind farm by 1.1-1.5 times. This statement of the authors raises certain doubts, since the wind flow, having done some work (giving up its kinetic energy) to rotate the first wind drive, will be weakened and its further effect on the second wind drive will be much smaller. In addition, part of the energy of the wind flow will be spent on rotating the tower using a weather vane. In addition, since parts of the earth's surface and parts of its atmosphere heated by solar energy move sequentially following the rotation of the Sun, the main direction of movement of the wind flows also does not remain constant during daylight hours.

For a more complete use of wind flow energy and increased generated power, a wind farm design is proposed, shown in Fig. 1. It contains two pairs of propeller type 1 and 2 wind drives connected through overrunning clutches 3 with a gear reducer 4 located on a fixed tower in the upper part of the supporting structure 8, the axes of each pair of wind drives are mutually perpendicular to each other, and one of them is parallel the direction of the "wind rose" characteristic of a specific territory (region). Both pairs of wind drives 1, 2 are connected to the gear reducer 4 through overrunning clutches 3 to eliminate the mutually inhibitory effect of the wind drives when changing the direction of movement of the wind flow. The working rotation of each pair of wind drives is made mutually opposite by choosing the appropriate angle of attack, shifted relative to each other by an angle of 90 °. The rotation of the shaft 5 of the gear reducer 4 relative to the vertical axis is converted by the reducer 6 into the rotation of the rotor of the generator 7. The supporting structure 8 with a height of at least 25-30 m, made in a pipe or other version, contains a foundation 9 of a reinforced concrete type.

The work of this design of the wind farm is as follows. Under the influence of an oncoming air flow of any of the possible directions, in the worst case, one of the two pairs of wind drives 1 and 2 will be rotated in space so that their rotation zones do not intersect. In this case, the rotation of the shaft 5 of the gear reducer 4 will be transmitted through the reducer 6 to the rotor of the generator 7.

The advantages of this design are as follows:

- there is no need to have a rotating tower with wind drives and a weather vane, consuming a significant part of the energy of the wind flow;

- a weakened wind stream that gave energy to the first of each pair of wind drives is not used again in the future;

- the possible inhibitory effect of the reverse rotation of the wind drives is excluded when changing the directions of the wind flow by using overrunning clutches.

LITERATURE

1. Application No. 95105665/06 of 04/12/1995

2.Application No.94043158 / 06 dated 12/06/1994

3. Application No. 200 111 5817/06 of 06/08/2001

4. Wind turbine of planetary type. J. "Science and Life." - No. 9, 2002. - P.17-18.

5. Tahoe-Godi A.Z., Tahoe-Godi G.A. Wind power station for high-rise buildings and structures. RF patent for the invention No. 2426004.

6. Shefter Ya.I., Christmas I.V. To the inventor about wind turbines and wind turbines. - M .: ed. Ministry of Agriculture of the USSR. - 1957. - p.104-105; Pustynnikov S.V. End twin-rotor wind generator. RF patent No. 2395715 C1. - Bulletin of inventions No. 21 dated 07/27/2010 and others.

Claims (2)

1. A wind power station with two pairs of propeller-type wind drives, comprising a supporting structure with a reinforced concrete foundation, a tower in the upper part of the supporting structure with propeller-type wind drives, characterized in that the tower is stationary with two pairs of propeller-type wind drives mutually perpendicular to each other, connected through overruns couplings with a common gear reducer common to them, while the working rotation of each pair of wind drives is performed in the opposite direction by choosing the appropriate vetroprivodov its angle of attack and shift relative to each other at an angle of 90 °, and each pair vetroprivodov rotation zone formed excluding the possibility of their mutual intersection. 2. Wind power station according to claim 1, characterized in that one of the two mutually perpendicular axes of the wind drives is located in the prevailing direction of the wind in the area.