Jaw Crusher Know-How

Jaw crusher is the best equipment for primary crushing applications that involve extremely hard or abrasive feeds. Especially for projects taht require a sized product with minimum fines. The unique overhead eccentric design is superior to the “straight-line” action of the swing-jaw type crusher because of its powerful “force-feed” crushing action with two strokes for each revolution on the flywheel. This minimizes compaction and keeps the discharge materials flowing freely, which in turn significantly increases output, lowers cost per ton, reduces wear, and allows the crushing of a wider range of materials. It is engineered to eliminate crusher strain caused by excessive stress that can cause premature failure from fatigue.

Jaw crushers are equipped with one fixed and one moveable crushing jaw (moving jaw), both of which support crushing plates (wearing parts) in several versions. They form a wedge-shaped crushing zone. The walls of the crushing zone are made of replaceable wearing sheets. Crushing is done between the two crushing jaws. The moving jaw of the single toggle jaw crusher moves elliptically. A pendulum motion is being carried out by the double toggle jaw crusher.

The crushing force is produced by an eccentric shaft. Then it is transferred to the crushing zone via a toggle plate system and supported by the back wall of the housing of the machine. Spring pulling rods keep the whole system in a condition of nonpositive connection. Centrifugal masses on the eccentric shaft serve as compensation for heavy loads. A flywheel is provided in the form of a pulley. Due to the favorable angle of dip between the crushing jaws, the feeding material can be reduced directly after entering the machine. The final grain size distribution is influenced by both, the adjustable crusher setting and the suitability of the tooth form selected for the crushing plates.

Jaw crusher has properties of large crushing ratio, even granularity, simple structure, reliable operation, easy maintenance, and low cost. So this kind of jaw crusher can be widely used in mining, metallurgy, building material, highway, railway, water project, chemical industry, etc, for crushing various material with compression strength .