Double-roll crusher can be divided into high speed and low speed double-roll crusher according to the revolving speed of roller; According to the installation methods of roller, it can be divided into two kinds: a roller bearing is active, and the other bearings is fixed and two roller bearings are active; According to the speed ratio of two roller, it can be divided into constant velocity and differential double roll crusher, etc. Roll crusher has many design parameters, while improper choosing and use will influence the production efficiency and effect.
Tile enterprises use mostly the fixed smooth differential double roll crusher whose one of rollers is more active, and the other is fixed. The characteristics of this kind of roll crusher is two rollers of the same diameter, rotational speed, moveable roller higher than the fixed one. Two roller rotation uses the differential rotational speed, which can make the material by grinding, shearing effect, effectively destroy material natural structure and improve the effect of material crushing.
Motor brings movement and power to the fixed roller through a triangle belt transmission and gear drive, and the fixed roller brings movement and power to the moveable roller by roller gear drive, which makes the two roller are counter-rotating. Material is feeding from the feeding mouth above. Through two opposite rotating grinding roller, with the aid of friction and gravity, the material will be bit into the crushing chamber, and make its squeeze and grind and broken. And finally material is discharged from the discharging port. The spring is safety device. When material with large pieces of debris or hard stuff can't be crush into the crushing cavity, the roller stress increases, and the moveable roller can move to the left and compress the spring through moveable bearing block. After discharging the objects, the roller can go back to its original position by means of the spring force. The size of the broken material particle is determined by the gap between the two roller surface, which can be appropriately adjusted. For the normal work of the roll crusher, we install the scraper device on each roller ring (in the case of two bare roller). Under the action of mechanical compaction force, Scraping clay plates tightly attach to the roll ring surface, which can clean the raw material in the roller ring surface.
The roller crusher is suitable for metallurgy, building materials,refractory materials and other industrial sectors broken, higher hardness of the material. The series of roll crusher is mainly composed of the roller, the roller support bearings, compaction and adjusting device and driving unit and other parts. The adjustment of the discharging granularity: with a wedge or gasket between the two roller adjusting device, adjusting bolt, wedge at the top of the device when the adjusting bolt will wedge pulled up, wedge rolling activity to the top from the fixed wheel.
The working principle: The roll crusher will be broken material feeding the mouth fall between two rollers, extrusion, finished product material nature. When the weather is good or not broken, the roll crusher roller but by hydraulic cylinder or the role of the spring automatic, make the roll gap
increases, quality or broken down, so as to protect the machine from being damaged. Relative rotation of the two roll gap to a certain extent, change the gap, can maximum discharging granularity control products. Double roll crusher is the use of a pair of opposite rotating round roll, four roll crusher is to use two opposite rotating round roll crushing operations.
Used field The roll crusher (to roll crusher) applies to the cement, chemical, electric power, mining, metallurgy, building materials, refractory materials, coal and other industries of thick, brittle block material intermediate crushing, it into the grain-size, discharging granularity is adjustable, can fight pressure strength of 160 mpa or less materials
are broken. Especially in the coal industry, the use of native raw coal fragmentation, as long as after iron, removing impurity, without gangue removal, can be directly to broken, broken out of material, granularity and the crushing rate is low, thereby simplifying the coal preparationprocess, reduce the investment and production cost. Matters you should attention 1) You should enhance the work to iron ore. The broken content (qian primary content) fall into can damage between double roller crusher, as a result causes accident. So in front of the breaker shall be installed in addition to iron plant. 2) Viscous material easy to jam broken space, in the treatment of the jam fault should stop processing, not in the running for tong mine. 3) When dealing with material are too many contain large, attentionshould be paid to large ore is easy to from the crushing space to prevent injury or damage to the equipment. 4) After double roll crusher run a long time, due to the roll surface wear larger, cause fairly granular product, then pay attention to adjusting the row ore mouth or on equipment maintenance. 5) You also need enhance the inspection of the roll crusher equipment,the lubrication part of the equipment on time to go, keep equipment good lubrication condition.
Features of the laboratory sealed double roll crusher: 1. Suitable for grinding high hardness or brittle materials. 2. Continuous finish the crushing and shrinking, to avoid the error by manual operation. 3. After the material shrinks, the sample is representative. 4. Sealed design, without dust pollution, easy to clean, environmental compliance. 5. Just lay it on a flat surfaceno need for a firm foundation. 6. Customers can easily adjust the pressure according to the required particle size and feed strength. 7. Good performance, low energy consumption, low operating cost maintenance cost. 8. No humidity requirement for feed. 9. High damping rate, small vibration, less dust, low noise. Get to know more industry stone crushers and lab use crushers. We supply a variety of stone crushing machines applied to different industries. Coal crusher, gold ore crusher, metal crusher, rock crusher, wood crusher, and so on. JXSC focuses on thestone crushing machine since 1985our gold mining equipment exported to more than 30 countries, worth your trust.
The laboratory roll crusher consists of machine body, rollers, and other components. The spindle drive by V-belt from the motor, the roller operate according been turned trajectory, crushing the materials in the crushing chamber. Mini roller crusher is equipped with an adjustment screw in front and rear. The laboratory double roll crusher left size with a shield to ensure safety, the machine with groove and bearing, the bearing can readily inject oil. Front mounted with hand wheel, sprockets, chain, and rear equipped with springs to easy adjustment, generally please dont adjust it. In order to avoid failure and safe use the equipment, please attend the parallel when adjusting.
Roll crushers, or crushing rolls, or double roller crushers, are still used in some mills, although they have been replaced in most installations by cone crushers. They still have a useful application in handling friable, sticky, frozen, and less abrasive feeds, such as limestone, coal, chalk, gypsum, phosphate, and soft iron ores.
The mode of operation of roll crushers is extremely simple, the standard spring rolls consisting of two horizontal cylinders which revolve towards each other. The set is determined by shims which cause the spring-loaded roll to be held back from the solidly mounted roll.
Smooth-surfaced rolls are usually used for fine crushing, whereas coarse crushing is often performed in rolls having corrugated surfaces, or with stub teeth arranged to present a chequered surface pattern. Sledging or slugger rolls have a series of intermeshing teeth, or slugs, protruding from the roll surfaces. These dig into the rock so that the action is a combination of compression and ripping, and large pieces in relation to the roll diameter can be handled. Their main application is in the coarse crushing of soft or sticky iron ores, friable limestone, coal, etc., rolls of 1 m diameter being used to crush material of top size 400 mm.
Wear on the roll surfaces is very high and they often have a manganese steel roll, which can be replaced when they are worn out. The feed must be spread uniformly over the whole width of the rolls in order to give even wear. One simple method is to use a flat feed belt of the same width as the rolls. Since there is no provision for the swelling of broken ore in the crushing chamber, roll crushers must be starvation fed if they are to be prevented from choking. Although the floating roll should only yield to an uncrushable body, choked crushing causes so much pressure that the springs are continually on the work during crushing, and some oversize escapes. Rolls should therefore be used in closed circuit with screens. Choked crushing also causes interparticle comminution, which leads to the production of material finer than the set of the crusher.
There are two types of roller crusher, smooth roller and tooth roller. Smooth roller crusher crushes materials mainly by extrusion of two rollers, meanwhile also has function of grinding, it is good for medium and fine crushing of medium hardness materials. While tooth crusher crushes material mainly by chopping, also has function of grinding, good for coarse and medium crushing of fragile and soft rocks.
Double roller crusher model is named by roller diameter and length, for example model 2PG0640, 2 means two roller, P stands for crusher, G stands for smooth roller, 06 stands for roller diameter 600mm, 40 stands for roller length 400mm. Similarly, 2PGC500x750, C stands for tooth roller.