Types of conveyor:
Troughed belt conveyor
Flat belt conveyor
Troughed belt conveyor:
Troughed belt conveyor is that in which the belt forms a trough on the carrying side while running over idler rollers which are either in set of 5 rolls, 3 rolls or 2 rolls. The troughing angle adopted are: 15°, 20° , 25° , 30° , 35° , 40° , 45° . Return idlers are usually straight roller type.
Transverse flexibility or rigidity of the belt is another significant consideration. It is important that the belt trough properly. The empty conveyor belt must make sufficient contact with the center roll in order to track properly.
Troughed belt conveyors are used for higher capacity, higher speed requirement, and for handling bulk material of large lump size. It suitable for inclined or declined type conveyors.
Transition distance is defined as the distance from the center line of the first fully troughed idler roll to the center line of either the head or tail pulley. The distance from the pulley to the top of the wing idler is certainly greater than the distance from the pulley to the center roll of the troughing set. If the transition distance is too short, the edge of the belt can be over stretched. This will adversely affect the load support and belt life.
Flat belt conveyor:
Flat belt conveyor is that in which the belt runs flat on the carrying side over straight roller type idler or a set of idlers.
Flat belt conveyors are suitable for lower capacity, low speed requirement and for handling unit goods or bulk material of small lump size and higher angle of repose. Declination is undesirable.