How does a jaw crusher work

Jaw crusher, commonly known as jaw crusher or tiger mouth, is a crushing machinery that simulates the movement of two jaws of animals to complete material crushing operations. The following is a detailed explanation of its working principle:

Structural composition:

The jaw crusher is mainly composed of a frame, a fixed jaw plate, a movable jaw plate (moving jaw), a protective plate, transmission components, an adjustment seat, and a moving jaw rod.

The fixed jaw plate and the movable jaw plate form the crushing chamber, which is the main working area for material crushing.

Principle of Motion:

The motor drives the belt and pulley, and the movable jaw moves up and down periodically through an eccentric shaft.

When the movable jaw rises, the angle between the elbow plate and the movable jaw increases, thereby pushing the movable jaw plate closer to the fixed jaw plate, and the material is placed between the two jaw plates.

Crushing process:

When the moving jaw approaches the fixed jaw, the material is subjected to multiple crushing effects such as compression, rubbing, and grinding between the two jaw plates.

As the moving jaw continues to move, the pressure on the material gradually increases. When the pressure exceeds the strength that the material can withstand, it breaks.

The crushed material is discharged from the discharge port at the lower part of the crushing chamber due to its own weight when the moving jaw leaves the fixed jaw.

Exercise cycle:

After completing a downward movement, the moving jaw will move upwards through an eccentric axis to discharge the material from the crushing chamber, and then move downwards again to start the next crushing cycle.

This periodic crushing and discharging process enables continuous crushing and mass production of materials.

Adjust the crushing chamber:

Jaw crushers usually have adjustable crushing chambers, and the outlet size of the crushing chamber can be adjusted as needed.

By adjusting the export size, the particle size of the final product produced by the crusher can be controlled to meet different production needs.

In addition, jaw crushers can be divided into various types based on their structure and working principle, such as double elbow plate and single elbow plate. Different types of jaw crushers may have differences in crushing efficiency, wear level, and other aspects.

In general, the working principle of jaw crushers is to crush materials through the periodic reciprocating motion of the moving jaw. They have the advantages of simple structure, reliable operation, and the ability to crush hard materials. They are widely used in industrial sectors such as mineral processing, building materials, silicates, and ceramics.