There are many types of windmill, from the big old mills of Holana to slender wind turbines used in modern wind farms. The structure and components of each are different because they are specifically tailored to the task they perform. However, all the windmills have the following basic components.
The support structure may be a building of any material capable of supporting the weight of the rotor. The structure most commonly used today is metallic, set by concrete, and has a height not less than six meters above hurdles and 100 meter radius to avoid turbulence. This structure is specially designed to withstand high winds and has access to scale and maintenance on the rotor. In Mills horizontal axis, this tower can be 4 long rods, starting from an open base to finish in tip top shape, joined together by small rods in a cross short distances to form a kind of staircase that allows access to the rotor.
The rotor blade is set (also known as blades or propellers). The rotor is the main part for capturing wind energy into rotational movements.
The blades must be completely balanced and with an aerodynamic shape to cause maximum revolution. Over time, the rotor has evolved to overcome different problems. Some changes include blade pitch to make them more efficient, rotation of the rotor to decrease the force of the wind, and brakes when wind speed is too strong.
The rotors have control mechanisms and guidance depending on the type of rotor. These mechanisms serve to guide the rotor to better harness the wind irrespective of its direction. There are two types of rotors with special mechanisms for greater efficiency
In any type of windmill, a system to move wind power to a certain point where you can use to accomplish a task is needed. The wind blows, moving the blades and causing the shaft to rotate, the rotation of the shaft is used through a system of shafts and gears that changes the orientation of the rotational movement and transfers it to where it is needed, whether a generator (to convert the movement to electricity) or a mechanical work (water pump, mill grain, etc.). A gear assembly can change the direction of movement, while the long axes transfer energy to another part of the mill. Click here to see specific examples (water pump, mill, grinding grain, electricity, etc.)