Jaw crusher

Jaw crusher, commonly known as jaw crusher or tiger mouth, is a kind of crushing equipment widely used in mining, building materials, roads, railways, water conservancy and chemical industries.The following is a detailed introduction to the jaw crusher：

I. Basic structure

The jaw crusher mainly consists of two jaw plates, the moving jaw and the static jaw, to form a crushing chamber, which simulates the movement of the animal's two jaws to complete the material crushing operation.Its key components include：

• Moving jaw plate: Suspended on the eccentric shaft, it can be used to swing left and right, and is connected to the eccentric shaft through a connecting rod.
• Static jaw plate(Fixed jaw plate): It is fixed vertically (or the upper end is slightly tilted outwards) on the front wall of the body, forming a crushing cavity with the moving jaw plate, which is large and small.
• Eccentric shaft: The main shaft of the crusher is subjected to a huge bending torque and is made of high-carbon steel.
• Rack: A four-wall rigid frame with upper and lower openings, which is used to support the eccentric shaft and withstand the reaction force of the broken material. It is generally cast from cast steel as a whole.

In addition, there are connecting rods, thrust plates, bearing housings, motors and other components that together form the complete structure of the jaw crusher.

II. Principle of operation

The working principle of the Jaw Crusher is that the motor drives the eccentric shaft to rotate through the belt and pulley, and the rotation of the eccentric shaft makes the movable jaw plate attached to it move up and down periodically with the eccentric shaft as the center. When the movable jaw plate is close to the static jaw plate, the material is sandwiched between the two jaw plates and is crushed by pressure and shear force. The crushed material is discharged through the discharge port at the bottom of the crushing chamber.

III. Performance characteristics

1. Simple structure: The structure of the jaw crusher is relatively simple, mainly composed of a fixed jaw plate and a movable jaw plate, which is easy to operate and maintain.
2. Strong crushing force: It can crush hard materials, such as rocks, ores, etc., and the crushing efficiency is high.
3. Wide range of applications: Suitable for different material particle sizes and production processes, such as assembly line operations.
4. High output: Because of it's simple structure and large crushing ratio, the output is relatively high.

However, jaw crushers also have some disadvantages, such as relatively low crushing efficiency, easy to wear, high noise, and limited scope of application (not suitable for materials with high viscosity, high humidity, or large amounts of fiber).

IV. Areas of application

Jaw crushers are widely used in the crushing of various ores and large materials in mining and smelting, building materials, roads, railways, water conservancy and chemical industries.The highest compressive strength of the broken material can reach 320MPa, including limestone, granite, gypsum, coal gangue and other materials.

V. Development trends

With the large-scale equipment specifications, the adjustment device and safety device of the jaw crusher must adopt a new mechanism.At present, the hydraulic adjustment mechanism has become an important trend in the development of jaw crushers.This kind of mechanism is not only simple and fast, but also can be adjusted as needed at any time during work.At the same time, the hydraulic mechanism is also used as the overload insurance device of the machine to achieve the effect of being safe and reliable without damaging the thrust plate.

In summary, jaw crusher is a kind of crushing equipment widely used in many industries. It has the advantages of simple structure, strong crushing force, and wide application range, but it also has some disadvantages.When selecting and using, it is necessary to consider comprehensively according to actual production requirements and material characteristics.