Page 124 - Demo

122 ISCAR GENERAL PURPOSE DRILLINGPlanetary Ring GearRing gears embrace the gearbox%u2019s planetary gears, allowing them to transform low incoming speed to high outgoing speed.Blade BearingAdjusts the angle of the blades by rotating a bearing at the root of each blade. The blade bearing enables control of the power and slows therotor. Made of bearing steel.Yaw RingThe yaw system of wind turbines is the component responsible for the orientation of the wind turbine rotor towards the wind. This is a mechanism that rotates the nacelle to face the changing wind direction. Made of alloy or bearing steel.Tower FlangeThe vast majority of commercial wind turbines use tubular steel towers. Tower heights depend on rotor diameter and wind speed conditions of the site. Their heights range from 50 meters for a 1 MW turbine to as high as 125 meters and more for very large turbines. The flange comprises a large scale of rolled steel which connects the tower%u2019s conical links.