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INVENTION
Patent of the Russian Federation RU2269027
VETROELECTRIC STATION
The name of the inventor: Kerentsev Andrei Pavlovich (RU); Petya Victor Gavrilovich
The name of the patent holder: Orenburg State Agrarian University
Address for correspondence: 460795, Orenburg, Chelyuskintsev, 18, OGAU
Date of commencement of the patent: 2004.05.12
The invention relates to the field of wind energy. The technical result is to increase the efficiency and increase the reliability of the work by reducing the losses in the transfer of energy to the generator shaft and by changing the force of pressing the roller against the rim of the wind wheel in proportion to the change in the moment of resistance on the generator shaft. The wind power plant includes a wind wheel with a rim mounted on the horizontal axis, a carriage with an electric generator, the drive shaft of which is provided with a roller contacting the outer surface of the wind wheel rim, the carriage being connected to the fixed base pivotably movable relative to the rim of the wind wheel.
DESCRIPTION OF THE INVENTION
The invention relates to wind power and relates to wind power stations in which power transmission to an electric generator is provided from the rim of the wind wheel.
There are known wind turbines containing a tower and a wind wheel with a horizontal axis of rotation, in which an increase in the number of revolutions during transmission from the wind wheel to the generator is effected through a reducer built into the head of the wind wheel (AS No. 79927, class F 03 D 1/00).
The disadvantage of such wind turbines is that the presence of a reducer in them, especially for large capacities, significantly complicates them, makes them heavier and reduces efficiency.
There is a known wind turbine adopted for the prototype, where a complex and multistage reducer is replaced by a device containing a carriage mounted on a horizontal axis with a wind wheel rim, with wheels interacting with the inner surface of the rim, and a generator mounted on the carriage platform, , Contacting the outer surface of the rim of the wind wheel. An annular pool is provided around the tower, and the carriage is equipped with a bar with a float immersed in the basin (AS No. 1307080, class F 03 D 1/06, 1987).
The disadvantage of this design is that the power generator roller is pressed against the rim of the wind wheel with a constant, calculated for maximum load, although the wind power station works both for large and small loads. As a result, the roller wear and energy loss increase.
The purpose of the invention is to increase the efficiency and reliability of the wind power plant.
The essence of the invention lies in the fact that the carriage is connected to the fixed base hingedly, and the spring provides only a touch of the roller and rim of the wind wheel.
The figure shows a schematic representation of the wind power station (the arrow shows the direction of rotation of the wind wheel).
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An example of a specific embodiment is a wind power station comprising a carriage 4 mounted on the horizontal axis of a wind wheel 2 with a rim 3, a carriage 4 with an electric generator 5 located on it, the drive shaft of which is provided with a roller 6 in contact with the outer surface of the rim 3. The carriage 4 is connected by a spring 7 with the tower 1 and is mounted with the possibility of moving relative to the rim of the wind wheel. |
THE VENERELECTRIC STATION WORKS AS FOLLOWS:
The spring 7 balances the weight of the carriage 4 with the electric generator 5 and provides only a touch of the roller with the rim of the wind wheel 2. Therefore, the force F with which the roller acts on the wind wheel is directed along the line O'A and can be decomposed into a tangential force F c and the force of the normal pressure P The force F c is determined by the moment of resistance on the generator shaft:
F c = M s / r,
Where M c is the moment of inertia from the force F c ;
R is the radius of the roller.
This force is transferred to the rim due to friction between the contacting surfaces of the roller and the wind wheel. In order for the clutch to be reliable, the sliding friction force F mp = P · k mp must be greater than the force F c in a certain number of times determined by the safety factor:
К з = F тр / F c = Р · к тр / F c = Р · к тр / P · tg 
= К тр / tg ,
Where K 3 is the safety factor;
To mp is the coefficient of friction.
It can be seen from this that the safety factor, in this case, does not depend on the moment of resistance on the generator shaft. Therefore, it is ensured that the wheel is sufficiently connected to the roller at high loads and that there is no excess pressure at small loads.
Instead of a spring, the weight of the generator can be compensated for by the counterweight located on the carriage extension.
When implementing the invention, the efficiency is dramatically increased, as compared to the known wind power stations, by reducing losses in the transfer of energy to the generator shaft. Increased reliability in the work due to a change in the force of pressing the roller to the rim of the wind wheel, proportional to the change in the moment of resistance on the generator shaft.
CLAIM
A wind power plant comprising a carriage with an electric generator mounted on the tower and a wind wheel with a rim fixed to the horizontal axis, the drive shaft of which is provided with a roller contacting the outer surface of the rim of the wind wheel, characterized in that the carriage is hingedly connected to the fixed base Relative to the rim of the wind wheel.
print version
Date of publication 02.02.2007gg
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