What Is a Roll Crusher?

Roll crusher is suitable for crushing medium-hard materials such as limestone, slag, coke, coal, etc. in cement, chemical industry, electric power, metallurgy, building materials, refractories and other industrial sectors. This series of roller crushers are mainly composed of rollers, roller support bearings, pressing and adjusting devices, and driving devices.

Toothed roller crusher is a new product designed and developed by referring to the structural principle of the US Gangluck crusher. This machine has the advantages of small size, large crushing ratio (5-8), low noise, simple structure, convenient maintenance, high productivity (1-2 times higher than China's 2PGC tooth roller crusher), and the size of the crushed material is uniform. , Low crush rate, easy maintenance, sensitive overload protection, safe and reliable. This toothed roller crusher is suitable for coal, metallurgy, mining, chemical industry, building materials and other industries. It is more suitable for crushing raw coal (including vermiculite) in large coal mines or coal preparation plants.

The toothed roller crusher has a large crushing capacity. The motor and the reducer are connected by a limited-range hydraulic coupling to prevent power overload and sensor overload protection, which is safe and reliable. The gap between the gear rollers is adjusted hydraulically, and the gear roller bearings are centrally lubricated. Tooth shape optimization design, tensile and shearing force selection is broken, high efficiency and low consumption, and uniform granulation. The birth of PCM toothed roller crusher completely replaced the existing 2PGC toothed roller crusher in China. Toothed roller crusher is divided into

Double smooth roll crusher uses a pair of round rolls that rotate towards each other to crush materials. The material falls between the two rollers through the feeding port on the top of the equipment, and is gradually crushed by the friction between the two rollers due to the effect of friction, and the finished material leaks from the lower part. When there are materials that are too hard to be broken, the rollers will automatically retreat to increase the gap between the rollers and the hard materials will fall. With the action of the hydraulic cylinder or spring, the rollers will return to the original gap to protect the machine and adjust the gap between the two rollers. , You can control the maximum granularity of the product.

The four-roller crusher uses two pairs of mutually rotating round rollers for crushing.

The figure below shows a double-roller (smooth) crusher. It consists of crushing roller, adjusting device, spring safety device, transmission device and frame.

Specifications	Feeding size mm	Output granularity mm	Yield t / h	Motor Power kw	Machine weight kg
2PG-400X250	25	1--8	5-10	11	1500
2PG-400X500	30	1--15	10-20	twenty two	2600
2PG-610X400	40	1--20	13-35	30	4500
2PG-750X500	40	2--20	15-40	37	12250
2PG-900X500	40	3--40	20-50	44	14000

The toothed roller crusher mainly uses special wear-resistant toothed rollers to rotate and crush the material at high speed (traditional

Roller crusher is a very old crushing equipment with simple structure. It is mainly used for medium and fine crushing of ore in industrial sectors such as cement and silicate. The crushing roller is the main working mechanism of the crusher, which is composed of a shaft, a hub and a roller skin. The degree of wear of the roller skin has a great influence on the working efficiency of the roller crusher. Only when the roller skin is in a good state can the crusher obtain a higher production capacity. Because of the importance of the roller skin, it is important to understand the factors that affect the wear of the roller skin and to repair the roller skin correctly.

The main factors that affect the wear of the roller skin are: the hardness and granularity of the material being crushed, the material of the roller skin, the size and surface shape of the roller, and the way of feeding the ore. For these factors, the correct approach is:

(1) The material distribution should be as uniform as possible to reduce the degree of wear of the annular groove and the roller skin on the surface of the roller;

(2) In the operation of the crusher, especially in the process of coarse crushing, pay attention to the size of the ore blocks, to prevent the ore blocks from being too large, causing the crusher to vibrate violently, thereby seriously abrading the roller skin;

(3) Selecting a roll with good abrasion resistance can reduce the degree of wear of the roll, thereby extending the life of the roll;

(4) The length of the miner should be consistent with the length of the rollers to ensure uniform feeding along the length of the rollers. In addition, in order to continuously feed the mine, the speed of the miner should be 1-3 times faster than the speed of the stick;

(5) Always check the particle size of the crushed product, and one of the rollers should be moved once in the axial direction within a certain period of time, and the movement distance can be about 1/3 of the particle size of the ore.

In addition, it is necessary to pay attention to the lubrication of the rollers, and it is necessary to leave inspection holes in the safety cover to facilitate the observation of the wear of the roller skin.

1. In order to ensure the maximum output of the roller crusher, the feeding must be continuously and evenly distributed over the entire length of the roller.

2. Regularly check the discharge port for blockage, and stop feeding before the motor stops working. When the block is completely dropped and the roller becomes idle, the motor can be stopped.

3. If the feeding is not uniform along the length of the roller, the roller surface will not only wear faster, but also uneven wear at various points, there will be annular grooves, which will damage the normal crushing work and uneven particle size of the crushed product. Therefore, in addition to the roll crusher used for coarse crushing, medium and fine crusher roll crushers are usually equipped with a feeder to ensure continuous and uniform feeding, and the length of the feeder is equal to the length of the roller, so that the feeding Uniform along the length of the roller.

4. The reasonable maintenance and correct operation of the roller crusher can ensure long-term continuous work and reduce downtime. Only normal management and daily inspection of the normal operation of the roller crusher can prevent failures and ensure continuous work. To this end, operators should note the following:

(1) Pay attention to the tightening of the bolts of each component, and tighten it immediately if it is found loose;

(2) The roller crusher must be started before work. After the rotation speed is normal, feed the material into the machine. The procedure is reversed when the machine is stopped.

(3) Regularly check the condition of the discharge port, and if there is a blockage, remove it;

(4) Pay attention to check the wearing degree of wearing parts, and pay attention to replacing worn parts at any time;

(5) The machine should not be overloaded, and electrical instruments should be paid attention to at all times;

(6) The bearing should be refueled in time, so that there is no oil leakage in the bearing;

(7) The temperature of the bearing shall be controlled, and the temperature rise shall not be higher than the ambient air by 25-30 ° C;

(8) Remove the dust and other materials from the plane of the bottom frame of the movable device, so as to avoid that the roller bearing can not move on the bottom frame when the roller crusher encounters materials that cannot be broken, so that a serious accident occurs.