RU2607444C1 - Wind motor - Google Patents

Abstract

FIELD: energy.

SUBSTANCE: invention relates to wind power engineering, in particular to wind motors with horizontal rotation axis of the wind wheel. Wind motor includes a horizontal shaft, multiple-blade wind wheel fixed on it, having internal and outer shells, between which there are main blades of the first level, flat blades of the second level are located on the outer shell in the amount that is equal to the length of the outer shell in meters, connected with the stiffness ribs by means of hinges to change the angle of attack of air flow depending on wind velocity, initial position of flat blades of the second level, fixed by means of hinged plates, is provided by higher tension springs and pin stroke limiters of the stiffness ribs.

EFFECT: invention is aimed at improvement of wind energy use coefficient and prevention of accidents.

1 cl, 6 dwg

Description

The invention relates to wind energy, in particular to wind engines, and can be used for the construction of wind power plants with a horizontal axis of rotation and an incoming air flow.

Known wind turbine containing a horizontal shaft, mounted on it a wind wheel (Wind Power. M: Energoizdat, 1982, S. 26, Fig. 1, 3, A-4). The disadvantage of this wind wheel is that it practically does not use the wind power of the central zone and the insufficient area of the blades in the middle and peripheral zones.

The technical task of the present invention is to significantly increase the total area of the blades of the wind wheel in the middle and peripheral zones in order to reduce its diameter and increase the utilization of wind energy.

The present technical essence is achieved by the fact that a wind turbine containing a horizontal shaft, a multi-blade wind wheel mounted on it with an inner and outer shells between which the main blades of the first level are located, the diameter of the outer shell in meters is equal to the number of main blades, the flat blades of the second are evenly located on the outer shell level in an amount equal to the length of the outer shell in meters, pivotally connected to stiffeners to change the angle of attack of the air flow depending STI on the wind speed. Flat hinged blades of the second level additionally contain tension springs and are connected by hinge bars.

The above structural changes of a wind turbine with an incoming air flow compared to the existing ones allow, all other things being equal, to significantly reduce the diameter of the wind wheel, calculated on the installed capacity of the wind power plant.

In FIG. 1 is a front view of a wind turbine (stretchings of the outer shell are not conventionally shown);

In FIG. 2 shows a section along aa;

In FIG. Figures 3 and 4 show the sweep of a part of the outer shell with hinged blades of the second level (the initial and final positions of the blades);

In FIG. 5 shows the sweep of the blade of a first-level wind wheel;

In FIG. 6 shows a top view of the blade of the first level.

The wind turbine (Fig. 1) consists of a multi-blade wind wheel 1, mounted on a horizontal shaft (Fig. 2). The blades of the first level are located and fixed between the inner shell 4 of the hub 3, the conical guide 6 of the air flow of the middle zone and the outer shell 7 (Fig. 2). To ensure sufficient strength of the wind turbine (especially with large wind wheel diameters), the blade 5 contains a stiffener 13 in the front part (Fig. 2, 5), and on the working surface of the stiffener plate 14 with an increasing angle of attack of the air flow (through each meter), which increases the degree of interaction of the air flow with the blades 5 of the wind wheel and the coefficient of use of wind energy (Fig. 5, 6).

On the outer casing 7 of the wind wheel 1, the flat blades 8 of the second level are evenly located in an amount equal to the length of the casing 7 in meters. The blade 8 is connected to the stiffener 10 by means of a hinge 9, which provides a change in the angle of attack of the air flow depending on the wind speed (Fig. 3, 4).

To reduce vibration, the blades 8 are interconnected by hinge bars 11, ensuring their joint operation. The initial position of the blade 8 at low wind speeds is fixed by a spring 12 and a pin limiter of the course of the stiffener 10 (Fig. 3), and the final position at high wind speeds, the blade 8 takes parallel to the direction of air flow (Fig. 4).

Additional strength of the wind wheel 1 is achieved by stretch marks 17 in an amount equal to the number of blades 5 of the first level, which are attached to the outer shell 7 and the head 16, mounted on the toroidal guide 15 of the Central zone air flow (Fig. 1, 2).

The device operates as follows. The incoming air flow (wind) to the wind turbine can conditionally be divided into three zones of influence: central, middle and peripheral with respect to the axis of rotation of the wind wheel. The air flow of the central zone using the toroidal guide 15 is thrown at an increased speed onto the working blades 5 of the first level in the middle zone, where the conical guide 6 further increases the wind speed due to the increased volume of air from the central and partially middle zone, increasing the air pressure on the blades 5 and stiffening plates 14.

The airflow of the peripheral zone most effectively acts on the plane hinged blades 8 of the second level, which provide a change in the angle of attack of the air flow from maximum at low wind speeds (Fig. 3) to minimum at high wind speeds (Fig. 4). This significantly reduces the wind load on the wind wheel in the peripheral zone, preventing emergency situations of the wind turbine.

Claims (1)

A wind turbine containing a horizontal shaft mounted on it with a multi-blade wind wheel with an inner and outer shells, between which the main blades of the first level are located, characterized in that on the outer shell there are flat blades of the second level in an amount equal to the length of the outer shell in meters, connected to the ribs rigidity by means of hinges for changing the angle of attack of the air flow depending on wind speed, the initial position of the flat blades of the second level, connected by hinged nkami, is provided by tension springs and pin limiters of the course of stiffeners.

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