Pulley Mechanism

Transmission of Power mental block Mechanism ByManoj Tiwari DFT/NIFT-GNagar Learning ObjectivesTo understand the Pulley Mechanism To aim the understanding of Mechanical Advantage using disemboweley-blocks. To explore the applications of Pulleys for machinelike military group transmission syllabus board Teachings by Manoj Tiwari 2 Pulley The block a variation of the axle and wheel the wheel is grooved to guide a rope, chain or cable along the circumference of the wheel, which moves freely close to the axle. track way Teachings by Manoj Tiwari 3 Pulley At its close to simple use, the pulley works to hange the direction of force applied in a system. More complex uses of pulleys are frequently used to attain mechanical advantage in a system. Class live Teachings by Manoj Tiwari 4 Pulley Systems Fixed (Class 1) Pulley Moveable (Class II) Pulley combining (Class III) Pulley Class way of life Teachings by Manoj Tiwari 5 Fixed Pulley Often used to alter the direction of force i n a system Weight of force is equal to the weight of the object organism moved. Advantage is gained by moving the operator away from the load Class room Teachings by Manoj Tiwari 6 Fixed Pulley A firm pulley does not ncrease your force and therefore gives you no advantage. It helps a individual lift things by changing the direction of force. It allows a soul to pull down in outrank to lift a load up. Class room Teachings by Manoj Tiwari 7 Fixed Pulley Class room Teachings by Manoj Tiwari 8 personal chattel pulley (Floating Pulley) Used to gain mechanical advantage to lift weight (W) by multiplying the forces Weight of force (F) needful to move the object is equal to the number of ropes (N) supporting the load (W). F = W/N Class room Teachings by Manoj Tiwari 9 Movable Pulley It is called a portable ulley because it moves with the load. The pulley is suspended by a rope with one portion of the rope (called a rope segment) on each side. Each rope segment supports half(prenomin al) the load. Class room Teachings by Manoj Tiwari 10 Movable Pulley The pulley is suspended and as a consequence the mechanical advantage is increased. The rope on the go away and right of the pulley are both lifting the LOAD, they each lift half its weight hence the load is split into 2 parts. Class room Teachings by Manoj Tiwari 11 gang Pulley The problem with movable pulleys is that a person has to pull up to lift a load. In order to make the job of lifting a load easier, a fixed pulley can be added to allow lifting a load by drag down. By combining a fixed pulley to a movable pulley, a person gets the advantages of both. The movable pulley doubles the persons force, and at the same time the fixed pulley let the person pull down to lift the load up. Class room Teachings by Manoj Tiwari 12 Combination Pulley Class room Teachings by Manoj Tiwari 13 Combination Pulley Class room Teachings by Manoj Tiwari 14 Combination Pulley Class room Teachings by Manoj Tiwari 15 Questions Cla ss room Teachings by Manoj Tiwari 16