Belt friction experiment pdf

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Cecille Idjao. Aleksey Buzulukov. Chandrakant Kaushik. Cristian Barros. How to write a concept paper with practical sample by Dr Lango 1. Solomon Assefa. Camille Junio. Jennefer Gudao Aranilla. Quick navigation Home. Experimental Method The apparatus was set and the flat pulley belt was locked over a 0 lap angle in position on the wall plate. A rope was hung over the pulley to give a lap angle of 0 and the load hangers were also hung to the end loops of the rope.

Thereafter a known weight, T 1 was loaded to the slack side hanger hence, starting to add loads to the other hanger called T 2 until the rope slides very slowly. The values of the loads, T 1 and T2 were recorded. The above procedure was repeated for five 5 different sets of loads, T 1 and T2 respectively on the lap angles of Then the lap angles were now varied beginning with: , , , , and , on a constant load of T 1 and T2 was determine and recorded as the rope slides slowly and the lap angles were also recorded.

DOI: Result And Discussion Six consecutive experiments were done for each angles of wrap; it was observed that, the entire system was always at the state of equilibrium irrespective of the angle before ht rope slides slowly.

Also, the ratio of the belt tensions increased with variation in the lap and groove angles while the load, T1 was kept constant on the slack side hanger. The results obtained is represented graphically using Microsoft excel on figures 2. Upon substituting these values into the derived expression above, we compute. Which means that the coefficient of friction is influenced by the angle of contact between the belt and the pulley.

References [1]. Mann, Herman : Belt friction, Ruhur University. Durowoju M. O, Sangotayo E. To prevent the belt by slipping, always the pulley ratio must be within the pulley ratio limits Lowe and upper Limit. In most of Engineering Applications power transmission takes a major place due to the efficiency of the mechanism.

Commonly, it can be seen belt drives, chain drives and gear drives are used to transmit power in machines. Concentrating to those power transmission methods, it can be clearly seen that belt drives and chain drives activate in same manner. Gear drives transmit power in a different manner rather than belt and chain drives.

When considering the advantages and disadvantages of belt drives as opposed to gear drives, there are some facts can be identified clearly. As Advantages ;. As Disadvantages ;. Thus, angular velocity of belt drive can be varied. That is the main purpose of using belt drives in various machines.

The power can be transmitted between widely mounted shafts. Efficiency of those are varied due to their unique characteristics. This efficiency mostly depends on the friction which is originated between belt and the contacting surface. Ropes, belts, and clutches are the commonly using elements in machine that use friction to transfer energy to one place from another place.

Use of belts made with elastic or flexible materials in industry is highly important in the conveying and transmission of energy for long distances. In power transmission devices belts are widely used as a successor for gears, shafts, and bearings in most of the fields.

Other benefits belt power transferring is it simplifies the design of machines, lifetime, reliability, and reduces the cost of machine maintenance and regarding cost. The rope-belt friction equipment borders on belt friction that explains the forces by friction in a surface and a belt, like a belt goes through a bollard.

When the force is applied from one end only a portion of the force is transferred to the other end through the pulley. The magnitude of the friction force goes up with the amount of turns about the pulley.

Above apparatus contains a loaded belt and wall mounted fixed pulley, rope, flat belt, V-belts incorrectly fitted and appropriately fitted , hangers for weights, standard size weights. In this experiment setting up time period is short because of the apparatus, and measurements are taken in a simple manner, In the. Apart from usage in machines mountain climbers and sailing crews should have general knowledge of belt friction when preforming their basic tasks.

Evaluating the coefficient of friction between pulley and the belt is the aim of this experiment. In summary, this lab experiment was meant about the relation between the two tensions with respect to friction.

Some scientific facts such as how the tensions vary according to the load applied and by that to calculate the coefficient of friction for each type of belt were learnt by this experiment. By conducting these type of experiments as mechanical engineering students it is easier to understand the application of belt drives in the field such as in automobile engines and in machines where rotational motion is applied to transmit power from a source to a load operating at a quite a distance.

Ashwini 31 August at Introduction A universal joint or flexible coupling is basically consisted of two shafts for transmitting circular motion from one link to other link.