Jaw crusher is an indispensable heavy-duty mechanical equipment in fields such as mining crushing, sand and gravel aggregate production, and construction waste recycling. It is particularly suitable for primary crushing (coarse crushing) and secondary crushing operations of high-hardness materials (such as granite, basalt, iron ore, etc.) with compressive strength not exceeding 320MPa. Its maximum feed size can reach 1250mm, and the processing capacity ranges from several tons to thousands of tons per hour, making it a key "primary crushing" equipment in the crushing production line.

 

The core structure of a jaw crusher includes components such as a fixed jaw plate, a movable jaw plate, an eccentric shaft, a flywheel, and a toggle plate. Its working principle is based on the curved extrusion mechanism: the motor drives the eccentric shaft to rotate through the transmission device, which drives the movable jaw plate to make periodic reciprocating movements. When the movable jaw plate approaches the fixed jaw plate, the material is crushed by extrusion, splitting, and impact; when the movable jaw plate retreats, the crushed material is discharged from the discharge port under the action of gravity. This continuous process ensures efficient and stable mass production.

 

The technical advantages of the equipment are significant. Firstly, it adopts a deep cavity "V" -shaped structural design, with no crushing dead zone, high feeding capacity and crushing efficiency, and a crushing ratio of 4-6, resulting in uniform finished product granularity. Secondly, key components such as the eccentric shaft and jaw plate are made of high manganese steel or alloy steel materials, through optimized design and precision manufacturing, which have strong bearing capacity, high equipment stability, and long service life. Thirdly, through gasket -type or hydraulic adjustment devices, the size of the discharge port can be flexibly controlled (usually 20–350mm) to meet diversified discharge requirements. Fourthly, the equipment operates with low noise, can be equipped with a dust removal system, meets environmental protection requirements, has significant energy-saving effect as a single machine, and is 15%–30% more energy-efficient than traditional equipment. Fifthly, it adopts a centralized lubrication system and modular design, resulting in low maintenance workload and low operating costs.

 

In terms of application scenarios, jaw crushers are mainly used for coarse crushing operations to process large pieces of raw ore or construction waste; in the secondary crushing link, they are often combined with cone crushers or impact crushers for aggregate processing or sand -making pretreatment; in addition, mobile models can also be configured to adapt to flexible operation needs.

 

Common models include the PE series (such as PE400×600, PE600×900) and the European version series. Taking the PE400×600 as an example, its feed port size is 400×600mm, the processing capacity is 40–100t/h, and the motor power is 30–37kW; while the PE600×900 model has a processing capacity of up to 90–180t/h and a motor power of 55–75kW, which is suitable for medium and large -scale production lines.

 

During use, attention should be paid to regularlying the position of the jaw plate to balance wear and extend service life; the equipment is usually equipped with a hydraulic overload protection system to prevent damage caused by the entry of hard objects such as metals; by adjusting the discharge port or combining with screening equipment, the finished product granularity can be precisely controlled.

 

In conclusion, with its characteristics of simple structure, strong adaptability, high efficiency and reliability, the jaw crusher has become the core equipment in the crushing field. Users need to comprehensively evaluate according to material characteristics, production capacity requirements and production processes to select the appropriate model.