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How does a stone crusher work

Stone crushers, include jaw crusher, cone crusher, impact crusher, and mobile crusher, are commonly used on construction sites and in stone quarries to crush large stones into smaller pieces. Crushed stone has a variety of purposes but is often used to make level surfaces, provide drainage under roads and buildings or to create gravel roads.

Most stone crushers have a hopper at the top — a container which holds the rock above the crusher and uses gravity to feed it in. Alternately, stone crushers can use a belt drive to continuously transport the stone into the crusher. At the bottom of nearly every type of crusher is a hole. Once a rock has been pressed into small enough pieces to fit through the hole, it exits the crusher either onto, a conveyor belt, into a bin or onto a large pile. In some cases, one rock crusher may feed directly into a second one, crushing the rocks up into finer and finer particles in two or three stages.

Jaw crushers are the oldest and one of the simplest sorts of rock crushers. A jaw crusher is like a giant collapsible V made out of two metal walls. The motor drives pulley, making the movable jaw does periodic movement through eccentric shaft. The angle between toggle plate and movable jaw increases when the movable jaw moves up. So the movable jaw closes to the fixed jaw. The stone is crushed in this process. The angle of jaw crusher between toggle plate and the movable jaw decreases when the movable jaw moves down, the movable jaw of jaw crusher moves away from fixed jaw by the pulling of rod and spring, the crushed stone is discharged from the outlet of jaw crusher.

Impact crusher crushes material by striking energy. When it works, the motor drives the rotor rotate at a high speed, on which the blow bar is installed. As soon as the material get into the affecting area of the blow bar, they will be stroke by the blow bar and be thrown to the impact devices around the rotor. The high speed forces the material to rebound from the impact liner to the area where the blow bar effects until they have been crushed to the required size. The clearance between the impact racks and the rotor can be adjusted to change the size and shape of the end products.

Gyratory and cone crushers work in pretty much the same way, although they have slightly different designs. The rock falls into the top of a chamber with a spinning grinder at the bottom. As the stont falls down, it is squeezed between the grinder and the walls of the chamber and crushed. As it continues to fall down the chamber, it is pulverized into smaller and smaller bits until it falls out the bottom.


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