Pulley Mechanism

Transmission of Power blocking Mechanism ByManoj Tiwari DFT/NIFT-GNagar Learning ObjectivesTo understand the cylinder block Mechanism To civilize the understanding of Mechanical Advantage using occlusions. To explore the applications of Pulleys for machinelike power transmission manakin board Teachings by Manoj Tiwari 2 Pulley The auction block a variation of the axle and wheel the wheel is grooved to run a rope, chain or cable along the circumference of the wheel, which moves freely around the axle. Class populate Teachings by Manoj Tiwari 3 Pulley At its most simple use, the pulley works to hange the direction of advertise applied in a system. More complex uses of pulleys are frequently used to gain mechanical advantage in a system. Class way of life Teachings by Manoj Tiwari 4 Pulley Systems Fixed (Class 1) Pulley Moveable (Class II) Pulley Combination (Class III) Pulley Class agency Teachings by Manoj Tiwari 5 Fixed Pulley Often used to alter the direction of force in a system Weight of force is equal to the weight of the object being moved. Advantage is gained by moving the operator away from the charge up Class room Teachings by Manoj Tiwari 6 Fixed Pulley A fixed pulley does non ncrease your force and therefore gives you no advantage. It helps a person lift things by changing the direction of force. It allows a person to pull down in order to lift a load up. Class room Teachings by Manoj Tiwari 7 Fixed Pulley Class room Teachings by Manoj Tiwari 8 Movable pulley (Floating Pulley) Used to gain mechanical advantage to lift weight (W) by multiplying the forces Weight of force (F) infallible 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 movable 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. apiece rope segment supports half 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 left and recompense of the pulley are both lifting the LOAD, they each lift half its weight hence the load is classify into 2 parts. Class room Teachings by Manoj Tiwari 11 Combination 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 pulling 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 Class ro om Teachings by Manoj Tiwari 16