What is the principle of windmill rotation?

The windmill is designed by using the lever principle, and it is a unidirectional rotating machine. The blades of a windmill are rotationally symmetrical, not axisymmetrical. In the case of wind, the torques generated by the blades at symmetrical positions cannot cancel each other, so part of the wind energy is left by the windmill.

The windmill can turn.

The blades of windmills are all inclined. Windmills are powered by wind. When the wind blows the blade, it is equivalent to applying a force to the blade and generating a rotating torque. Under the action of this force, the windmill will keep rotating.

Windmill, also known as wind turbine, is a kind of power machinery that uses wind as energy without fuel. Ancient windmills were developed from sails. It has 6~8 pairs of awnings like sailboats, which are distributed around a vertical axis. When the wind blows, it rotates around the axis like a lantern, which is called a lantern windmill.