Twin-roller crusher, a kind of mining machinery, is also called a double-roller crusher. Mainly used for crushing ore. This machine has the advantages of small size, large crushing ratio (5-8), low noise, simple structure, and easy maintenance. The crushed materials have uniform particle size, low over-crushing rate, easy maintenance, sensitive overload protection, safety and reliability. It is suitable for coal, metallurgy, mining, chemical industry, building materials and other industries, and is more suitable for crushing raw coal (including gangue) in large coal mines or coal preparation plants. The toothed roller crusher has a large crushing capacity. The motor and reducer are connected by a limited-distance hydraulic coupling to prevent power overload. The sensor overload protection ensures safety and reliability. The gear roller spacing is hydraulically adjusted, and the gear roller bearings are lubricated centrally. Optimized tooth shape design, selective crushing by tension and shear force, high efficiency, low consumption, and uniform granulation.

Working principle:

1. The roller crusher is mainly composed of rollers, roller support bearings, compression and adjustment devices, and driving devices.

2. Adjustment of discharge granularity: A wedge-shaped or gasket adjustment device is installed between the two rollers. The top of the wedge-shaped device is equipped with an adjusting bolt. When the adjusting bolt pulls up the wedge, the wedge The wedge pushes the movable roller away from the fixed wheel, that is, the gap between the two rollers becomes larger, and the discharge granularity becomes larger. When the wedge moves downward, the gap between the two movable rollers becomes smaller under the action of the compression spring, and the discharge granularity becomes larger. become smaller. The gasket device adjusts the discharge particle size by increasing or decreasing the number or thickness of the gasket. When the gasket is added, the gap between the two rollers becomes larger. When the gasket is reduced, the gap between the two rollers becomes smaller. Small, the discharge particle size becomes smaller.

3. The driving mechanism is composed of two electric motors, which are driven to the sheaves through a triangle belt to drag the rollers and rotate in the relative direction. When crushing materials, the materials pass through the rollers from the feed inlet and are crushed after rolling. The crushed products are discharged from under the bottom frame.

4. For safety, the transmission part should install a safety cover according to the actual situation.

Each stick of the roller crusher is driven by an independent motor. There is also a motor that drives a stick with a fixed bearing through a belt drive. The other end of the roller shaft of the fixed bearing is equipped with a gear, and the gear drives the movable stick. Since the change in material properties causes the movable stick to move left and right, the gear tooth height must be increased to prevent the teeth from disengaging. Therefore, traditional double-roller crushers use long-tooth gear transmission, which allows the center distance of the two rollers to be changed during operation without damaging the gearing characteristics.

The working surface of the roller depends on the usage requirements. It can be smooth, toothed or grooved. If you want to crush harder and abrasive materials, you can choose smooth rollers. Because the smooth roller's crushing effect on materials is mainly crushing and grinding, it is mainly suitable for medium and fine crushing of medium-hard materials.

In order to obtain products of different particle sizes, the size of the discharge opening of the roller crusher must be adjustable. In order to prevent the crusher from being damaged by excessive iron, a safety device must be installed. The movable rollers of the roller crusher are supported by spring pressure. Under normal working conditions, the spring force is sufficient to overcome the crushing force required to crush the material. Gaskets of different thicknesses are placed between the frame and the movable bearing. By changing the number of gaskets, the width of the discharge opening between the two rollers can be adjusted to meet the requirements of different product particle sizes. When unbreakable materials enter the crushing cavity, the spring is compressed , the movable roller retreats and the discharge opening increases. After the material is discharged, the movable roller resets under the pressure of the spring. This is the mechanical discharge opening adjustment and overload protection device (safety device).