Product Introduction

The PE Series Jaw Crusher is mainly used for medium-size crushing of various ores and bulk materials, and is widely applied in mining, smelting, building materials, highway, railway, water conservancy and chemical industries. The compressive strength of the materials to be crushed shall not exceed 320MPa.

Structural Composition

1. Frame

   The frame is a rigid four-wall frame with upper and lower openings, which is used to support the eccentric shaft and withstand the reaction force from the crushed materials. It is required to have sufficient strength and rigidity, and is generally integrally cast with cast steel. Small models can also use high-quality cast iron instead of cast steel. The frame of large models needs to be cast in sections and then firmly connected into a whole with bolts, with a complex casting process. The frame of self-made small jaw crushers can also be welded with thick steel plates, but with relatively poor rigidity.

2. Jaw Plates and Side Guard Plates

   Both the fixed jaw and movable jaw are composed of a jaw stock and a jaw plate. The jaw plate is the working part, which is fixed on the jaw stock with bolts and wedge irons. The jaw stock of the fixed jaw is the front wall of the frame, and the jaw stock of the movable jaw is suspended on the shaft. It must have sufficient strength and rigidity to withstand the crushing reaction force, so most of them are made of cast steel or cast iron.

3. Transmission Components

   The eccentric shaft is the main shaft of the jaw crusher, which bears huge bending and torsion forces and is made of high carbon steel. The eccentric part must be precision machined and heat treated, and the bearing bushes are cast with Babbitt alloy. One end of the eccentric shaft is equipped with a pulley, and the other end is equipped with a flywheel.

4. Adjustment Device

   The adjustment devices include wedge type, shim plate type and hydraulic type, among which the wedge type is commonly used. It consists of front and rear wedges: the front wedge can move back and forth to hold the rear thrust plate; the rear wedge is the adjusting wedge, which can move up and down. The inclined surfaces of the two wedges are fitted in reverse direction, and the rear wedge is moved up and down by the screw to adjust the size of the discharge opening. The discharge opening adjustment of small jaw crushers is realized by increasing or decreasing the number of shims between the rear thrust plate support and the frame.

5. Flywheel

   The flywheel of the jaw crusher is used to store the energy during the idle stroke of the movable jaw, and then release it in the working stroke, making the working load of the machine tend to be uniform. The pulley also acts as a flywheel. The flywheel is usually made of cast iron or cast steel, and the flywheel of small models is usually made in one piece. Attention must be paid to the static balance during the manufacturing and installation of the flywheel.

6. Lubrication System

   The eccentric shaft bearings usually adopt centralized circulating lubrication. The supporting surfaces of the mandrel and thrust plate are generally lubricated with grease through a manual grease gun. The swing angle of the movable jaw is very small, which makes it difficult to lubricate between the mandrel and the bearing bush. Therefore, several axial oil grooves are usually opened at the bottom of the bearing bush, and an annular oil groove is opened in the middle to connect them, and then dry grease is forcibly injected by an oil pump for lubrication.

Performance Characteristics

1. Large crushing ratio and uniform product particle size.

2. Shim plate type discharge opening adjustment device, which is reliable and convenient with a wide adjustment range, increases the flexibility of the equipment and can meet the needs of different customers.

3. Safe and reliable lubrication system, easy component replacement and low maintenance workload.

4. Simple structure, reliable operation and low operating cost.

5. Low noise and less dust emission.

Technical Parameters