www.Mechanical engineering basics.com

 Types of bearings using in Wind Turbines       Bearings : These bearings can support extremely heavy loads at slow speeds. They allow the transmission of both axial and radial forces, as well as accommodating tilting moments. Generally types bearing used in wind turbines are 1.Slew ring bearing for Using for Blade pitching and yawing purpose 2. Ball bearing for Generator DE & NDE side 3. Spherical roller bearing for Main bearing  4. Cylinder roller and tappered roller bearing for Gearbox internal shafts. 1. Slewing ring bearings are generally used in the pitch and yaw locations of a wind turbine, to enable the blades to rotate smoothly. These bearings can support extremely heavy loads at slow speeds. They allow the transmission of both axial and radial forces, as well as accommodating tilting moments. 2. Ball bearings are used in machines which have lot of movement in their working process. Ball bearings reduce the friction during motion,so that effic...

 

                                               Ladder Safety Points       Sr.No Safe Extension Ladder Use—DO: Safe Extension Ladder Use—DON’T : 1 Maintain a 3-point contact (two hands and a foot, or two feet and a hand) when climbing/descending a ladder. Place a ladder on boxes, barrels, or unstable bases. 2 Face the ladder when climbing or descending. Use a ladder on soft ground or unstable footing. 3 Keep the body inside the side rails. Exceed the ladder’s maximum load rating. 4 Use extra care when getting on or off the ladder at the top or bottom. Tie two ladders together to make them longer. 5 Avoid tipping the ladder over sideways or causing the ladder base ...

  A large, tall machine is used for moving heavy objects by suspending them from a projecting arm or beam. 1.    Wall mounted cranes 2.    Gantry cranes 3.    One leg Gantry cranes                                                 4.    Jib cranes 5.    Mobile cranes a.     Truck mounted cranes b.    Crawler crane c.     Tyre mounted crane d. Loco Crane The following factor to be considered while lifting load •       About the load •       Where the load will be shifted •       Method to be adopted 1.    Manual handling 2.    Mechanical handling •       About the operator •       About the Supervisor...