Topic: Conveyor belt Name: Enrollment no.: Aftab Ajmeri Harsh Bhatt Akshay Bhut Paras Boricha Rathva Yogesh

What is Conveyor Belt ?? A conveyor belt is the carrying medium of a belt conveyor system. A belt conveyor system is one of many types of conveyor systems. A belt conveyor system consists of two or more pulleys (sometimes referred to as drums), with an endless loop of carrying medium—the conveyor belt— that rotates about them. One or both of the pulleys are powered, moving the belt and the material on the belt forward. The powered pulley is called the drive pulley while the unpowered pulley is called the idler pulley.

. There are two main industrial classes of belt conveyors; Those in general material handling such as those moving boxes along inside a factory and bulk material handling such as those used to transport large volumes of resources and agricultural materials, such as grain, salt, coal, ore, sand and more. Today there are different types of conveyor belts that have been created for conveying different kinds of material available in PVC and rubber materials.

Design Methodology In conveyor belt system, conveyor belts are basically very wide belts that are attached in a loop to two or more turning rotors driven by motors. The loop is actual conveyor belt, and is generally made of two or more layers of rubber, one layer to give shape and structure to belt and one to allow it to transport its load safely. This conveyor loop is attached to two wheels, called rotors, which are spun by motors. The conveyor belt has enough friction between it and rotor that it sticks to this rotor.

The movement of conveyor belt as a rotor turns, the belt turns as well due to the intense friction between rotor wheel and the belt. This turning motion of rotor causes one side of belt to move in one direction, while the other moves in opposite direction. This means that both wheel must be moving in relatively the same direction, either clockwise or counter clockwise. If two rotor wheels moved in opposite direction, the belt would not move at all.

Design of a Belt Conveyor  Belt-conveyor design begins with a study of the material to be handled.  Since weight per cubic meter or foot is an important factor, it should be accurately determined with the material in an as-handled condition.  It is not wise to rely solely on published tables of weight per cubic meter or foot for various materials, since many processing operations will affect this by compacting the material.  Lump size is important, too.

In establishing belt-conveyor tonnage requirements it is important to work with peak rather than average loads. Only occasionally, because of intentional or accidental variations in production rates, are these two figures identical. The belt that runs empty half the time must carry twice the average load when it is working. When a belt conveyor must change direction, it is often easier to use more than one conveyor.

Belt width and speed are functions of bulk density of the material and lump size. Lowest first cost can often be obtained by using the narrowest possible belt for a given lump size and operating it at maximum speed. However, speed often may be limited by dusting, and sometimes it may be better economy to use a wider belt with fewer plies to combine the necessary tensile strength with good belt troughing characteristics. Ideally a belt should run with lump size, slope, and with uniform feed introduced to the belt centrally as nearly as possible.

Power to drive a belt conveyor is made up of five components: power to drive the empty belt, to move the load against friction of the rotating parts, to raise or lower the load, to overcome inertia in putting material into motion, and to operate a belt-driven tripper if required. As with most other conveyor problems, it is advisable to work with formulas and constants from a specific manufacturer in making these calculations

Loading and discharge points on belt conveyors need to accommodate several factors. It is particularly important that material be loaded onto the belt in its centre and in the direction of its travel, preferably with lumps falling on a layer of fine material. Fines can be delivered to the belt first by notching the feed chute or installing a screen section or grizzly bars.

Belt conveyors are the most commonly used as powered conveyors because they are the most versatile and the least expensive. Product is conveyed directly on the belt so both regular and irregular shaped objects, large or small, light and heavy, can be transported successfully. These conveyors should use only the highest quality premium belting products, which reduces belt stretch and results in less maintenance for tension adjustments. Belt conveyors can be used to transport product in a straight line or through changes in elevation or direction. In certain applications they can also be used for static accumulation or cartons. Application

Thank you