The rotary windmill will spin faster. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Alternative energy sources
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In our country, many people are engaged in the design of wind turbines and, due to the shortage and high cost of hydrocarbon raw materials, there will be even more of the latter. I offer do-it-yourselfers the design of a rotary attachment for a rotary wind generator, which significantly increases its power and efficiency.
A rotary windmill works due to aerodynamic asymmetry - the difference in forces acting on the concave and convex surfaces of the blades. A concave blade provides more resistance to the air flow than a convex one, but significant forces also act on the convex one, "eating away" part of the rotor power.
The nozzle proposed by me, blocking the blade from the wind, deployed to it with a convex side, significantly reduces the "harmful" pressure, thereby increasing the efficiency of the windmill.
Rice. 1. Operation of the rotor without a nozzle (a) and with a nozzle (b)
Rice. 2. Adjusting the position of the nozzle depending on the direction and strength of the wind: 1 - nozzle; 2 - rotor (a - with a weak wind; b - with a strong wind; c - when the rotation of the rotor stops)
Rice. 3. Nozzle: 1 - sector of the cylinder; 2,4 - upper and lower bearing supports; 3,5 - top and bottom jumpers
Rice. 4. The device of a rotary wind generator with a regulating nozzle: 1 - adjustment wheel; 2 - wind generator mast; 3 - gear wheel of the rotary mechanism; 4 - gear of the rotary mechanism; 5,7 - bearing supports of the nozzle; 6 - rotor axis; 8 - rotor blade (4 pieces); 9 - nozzle jumper (2 pcs.); 10 - nozzle sector (2 pcs.); 11,12 - axle bearings; 13 - drive gear of the electric generator drive; 14 - electric generator
Depending on the strength and direction of the wind and other weather conditions, by turning the nozzle and blocking the air flow acting on the blade, you can adjust the rotor speed until it stops completely.
The nozzle position is adjusted using a rotary mechanism consisting of a roller mounted on the mast of the windmill with a gear at the end and a gear wheel mounted on the bottom bearing housing of the nozzle.
The rotation of the roller with the drive gear is carried out by a steering wheel of four spokes. To prevent spontaneous rotation of the nozzle under the influence of wind, it is necessary to provide a lock on the roller. The rotor axis rotates in bearings mounted on the upper and lower platforms of the mast. At the lower end of the axle, the drive gear of the increased drive of the electric generator is fixed.
Author: Khabibrakhmanov, Kandalaksha
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