RU124927U1 - WIND ENGINE - Google Patents

Abstract

A wind turbine including a first blade wind turbine mounted on a horizontal shaft, characterized in that the second, additional blade wind wheel is mounted symmetrically to the first wind wheel on the shaft, the shaft is mounted for rotation in the vertical elements of the U-shaped bracket, which is mounted on an axis mounted on a support with the ability to rotate and fix in the desired position, while aerodynamic wings are attached to the ends of the respective blades of the first and second wind wheels.

Description

The utility model relates to the field of wind energy and can be used in the design and manufacture of wind power plants (wind turbines) with an electric generator.

Known wind turbine, including a wind wheel containing aerodynamic wings mounted on brackets rigidly connected to a vertical shaft, CN 184089 (A).

This type of wind turbine operates with a relatively low noise level, which allows it to be used near residential areas. The power of the wind turbine increases sharply at a wind speed of 3 to 7-8 m / s. However, at wind speeds greater than 7-8 m / s, the power of the wind turbine drops sharply (see Jochen Twele, Erläuterungen, zu den technischen Daten, Marktübersicht. Kleine Windenergieanlagen (KWEA) 2010/2011, Handbuch der Technik, Genemigung und Wirtschaftlichkeit kleiner Windleer ss52-53, copy attached).

Known wind turbines, including a blade wind wheel, rigidly mounted on a horizontal shaft, RU 2186246 C2.

This technical solution was made as a prototype of this utility model.

The disadvantage of this type of wind turbines is the fact that they develop relatively low power at low wind speeds compared with the analogue described above, but at wind speeds greater than 7-8 m / s, the power of the wind turbine is quite high.

The objective of this utility model is to create a wind turbine that quickly develops power at a wind speed of 3-8 m / s and does not lose power with an increase in wind speed of more than 7-8 m / s.

According to a utility model, in a wind turbine including a first impeller, mounted on a horizontal shaft, a second, additional impeller, is mounted on the shaft symmetrically to the first impeller, the shaft is rotatably mounted in the vertical elements of the U-shaped bracket, which is mounted on an axis mounted on the ability to rotate and fix in the required position, while aerodynamic wings are attached to the ends of the respective blades of the first and second wind wheels.

The applicant has not identified any technical solutions identical to the claimed one, which allows us to conclude that the utility model meets the criterion of "Novelty."

The essence of the utility model is illustrated by drawings, which depict:

figure 1 - wind turbine, front view;

figure 2 is a side view of figure 1;

figure 3 - wind turbine in a perspective view;

figure 4 is a diagram of the dependence of the power of the wind turbine on the wind speed in the modes of aerodynamic wings and a wind wheel.

The wind turbine includes a first blade wind wheel 1 mounted on a horizontal shaft 2 and a second additional wind wheel 3 mounted on a shaft 2 symmetrically to the first wind wheel 1. In a specific example, the number of blades of the wind wheel 1, 3 is three, but may be different. The shaft 2 is mounted in the vertical elements of the U-shaped bracket 4 by means of bearings 5, 6. The U-shaped bracket 4 is mounted on an axis 7 which is pivotally mounted and can be fixed in the required position on the support 8, in this example, a mast 12 m high. and fixing the U-shaped bracket on the support 8 (drive) is not shown in the drawings. Aerodynamic wings 9 are attached to the ends of the respective blades of the wind wheels 1 and 3.

The device operates as follows.

In a specific example, at low wind speeds (region I in the diagram, Fig. 4), the U-shaped bracket is rotated and fixed in a position in which the wind direction is perpendicular to the longitudinal axes of the aerodynamic wings 9. The wind load is absorbed by the aerodynamic wings 9 and transferred to the shaft 2, which starts to spin. In this case, the blades of the wind wheel 1, 3 are in planes parallel to the direction of the wind and practically do not perceive the wind load. At wind speeds of more than 7-8 m / s, the efficiency of the aerodynamic wings decreases, and at a wind speed of 9 m / s the power of the wind turbine becomes equal to its power using paddle wind wheels (Fig. 4).

At wind speeds> 9 m / s (region II in the diagram, Fig. 4), the U-shaped bracket is rotated 90 ° and fixed in this position. In this case, the planes of the blades 1, 3 are perpendicular to the direction of the wind. The wind load is perceived by the paddle wind wheels 1, 3 and transmitted to the shaft 2. The shaft 2 drives the shaft of the electric generator (not shown in the drawings). The power of the wind turbine initially sharply increases and is more than 12 kW, and at wind speeds of more than 12-14 m / s it begins to decrease smoothly, but even at a wind speed of about 25 m / s, the power of the wind turbine considered in the described example is about 10 kW.

Thus, the implementation of the distinguishing features of the utility model provides a technical result, consisting in the fact that at low wind speeds the wind turbine quickly develops a sufficiently large power and, in fact, retains it with an increase in wind speed over 7-8 m / s.

Claims (1)

A wind turbine including a first blade wind turbine mounted on a horizontal shaft, characterized in that the second, additional blade wind wheel is mounted symmetrically to the first wind wheel on the shaft, the shaft is mounted for rotation in the vertical elements of the U-shaped bracket, which is mounted on an axis mounted on a support with the ability to rotate and fix in the desired position, while aerodynamic wings are attached to the ends of the respective blades of the first and second wind wheels.

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