Introduction



For roller crusher, it is suitable for fine operation with feed size less than 80mm and finished product size of 50 m-20mm.Such as the use of pebbles, construction waste artificial sand;Mining fine iron ore, quartz stone;Ceramic industry broken raw materials.It is applicable to the coarse and intermediate crushing of brittle block materials in cement, chemical industry, electric power, mining, metallurgy, building materials, refractory materials, coal mines and other industries, with large incoming particle size and adjustable discharging particle size. It can crush materials with compressive strength ≤160MPa.
Features
1. Equipped with PDG-II pair-roll crusher in the grinding system, the production capacity of the grinding equipment can be fully utilized. Generally, the output can be increased by 30%-40%, and the total energy consumption can be reduced by 20%-30%.
2. Compact structure, light weight and small size. For the grinding system with the same production capacity requirements, the PDG-II counter-roller crusher can significantly save investment.
3. Simple structure, small space occupation, convenient operation and maintenance.
4. There is a dust-proof board inside, which has good sealing performance, avoids splashing of small materials after crushing, less dust, low working noise, and greatly improved working environment.
5. Re-optimized design of the abrasive roller body, the equipment does not need to change the roller body for life, while the old type of roller machine needs to be disassembled for overhaul and replaced after one year of use.
6. The grinding roller of the counter-roller crusher is equipped with replaceable wear-resistant liners. The wear-resistant liners are made of domestic advanced wear-resistant materials, which have the advantages of long service life, not easy to damage, and convenient maintenance. The continuous service life can reach more than one year. When the wear is serious, the cover can be replaced. The maintenance is small and the cost is low, which is unmatched by any other type of crusher in China.
7. The roller crusher is equipped with a safety protection device. When an accidental metal iron piece enters the crushing cavity, the protection device will act, and the iron piece leakage equipment will operate normally.
8. The roller gap of the abrasive roller body of the roller crusher can be adjusted between 1mm and 20mm. After adjusting the gap according to the requirements of the crushing particle size, the crushing particle size can be reliably controlled, and all the particles are discharged from the bottom of the crushing cavity with the ideal particle size.
9. Simple and reasonable structure, low operating cost, stable operation, high efficiency and energy saving, high crushing efficiency, and adjustable discharge particle size.
10. The counter-roll crusher is the working principle of low-speed and high-pressure counter-roll squeeze. The material falls vertically into the crushing cavity from the upper part of the crusher, and is crushed by the strong pressure generated between the two rollers. Most of the material has become powdery, and a large number of cracks have occurred in the remaining small part of the granular material. In the further crushing process, the energy consumption of grinding can be greatly reduced and the output can be increased.
working principle
1. This series of roller crushers are mainly composed of rollers, roller support bearings, pressing and adjusting devices, and driving devices.
2. The adjustment of the discharging granularity: there is a wedge or gasket adjustment device between the two rollers, and the top of the wedge device is equipped with an adjustment bolt. When the adjustment bolt pulls the wedge up, the wedge pushes the movable roller away The fixed wheel, that is, the gap between the two rollers becomes larger, and the discharging granularity becomes larger. When the wedge is downward, the movable roller is under the action of the compression spring and the gap between the two wheels becomes smaller, and the discharging granularity becomes smaller. The gasket device is by adding or subtracting gaskets
The quantity or thickness is used to adjust the size of the discharge particle size. When the spacer is increased, the gap between the two rollers becomes larger, and when the spacer is reduced, the gap between the two rollers becomes smaller and the discharge particle size becomes smaller.
3. The driving mechanism is composed of two motors, which are driven by a V-belt to the pulley to drag the roller, and rotate according to the relative direction. When crushing the material, the material passes through the roller from the feed port, and is crushed by rolling, and the crushed product is discharged from the bottom of the chassis.

4. For safety, the transmission part should install the safety cover by itself according to the actual situation.
Each stick of the roller crusher is driven by a separate motor. A motor is also used to drive a stick with a fixed bearing through a belt drive. The other end of the roller shaft that fixes the bearing is equipped with a gear, and the movable stick is driven by the gear. Due to the change in the nature of the material, the movable stick moves left and right, so the gear tooth height must be increased to prevent the tooth from detaching. Therefore, the traditional roller crusher adopts long-tooth gear transmission, which allows the center distance of the two rollers to be changed during operation without breaking the toothing characteristics. The working surface of the roller depends on the requirements of use, and can choose smooth surface or tooth surface or groove surface. For crushing hard and abrasive materials, smooth rollers can be used. 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 over-iron damage, it must be equipped with a safety device. The movable roller shaft of the roller crusher is supported by spring pressure. Under normal working conditions, the spring force is sufficient to overcome the crushing force required by the crushed material. Spacers of different thicknesses are placed between the frame and the movable bearing. The width of the discharge opening between the two rollers can be adjusted by changing the number of spacers to meet the requirements of different product sizes. When materials that cannot be crushed enter the crushing cavity, the spring is compressed. , The movable roller retreats to increase the discharge opening. After the material is discharged, the movable roller resets under the pressure of the spring. This is the mechanical discharge port adjustment and overload protection device (safety device).
Each roll of the roller crusher is driven by a separate motor.A motor is also used to drive a stick with a fixed bearing through a belt drive. The other end of the roller shaft with a fixed bearing is equipped with a gear which drives a movable stick.Due to the change of material nature, the movable stick moves from left to right, so the gear tooth height must be increased to prevent the teeth from joining off.Therefore, the traditional roller crusher is a long tooth gear transmission, it can allow the operation of the two roller center distance without breaking the characteristics of the teeth.
The working surface of the roller depends on the requirements of use. The smooth surface, tooth surface or groove surface can be selected.If the crushing of hard, abrasive materials, can choose a smooth roller.Because the crushing action of the smooth roller on the material is mainly crushing and grinding, it is mainly suitable for medium and fine crushing of medium and hard materials.

In order to obtain products of different particle size, the size of discharge port must be adjustable.In order to prevent the crusher iron damage, and must be equipped with safety device, roller crusher movable roller type with the spring pressure support, in the normal working state, the spring force is enough to overcome the crushing force of the crushing material.Bearing frame and activity between different thickness of the gasket was laid, changing Numbers of gasket, can adjust the discharging mouth width between the two rollers to meet the requirements of different particle size, when you have not broken material into the crushing chamber, the spring is compressed, increase activity roller concession discharging mouth, after discharge, the material under the spring pressure, roll reduction activities.This is the mechanical discharge port adjustment and overload protection device (safety device).

Working principle of double roll crusher
It is mainly composed of fixed and movable crushing roller, pressing and adjusting device and driving device.The working mechanism is two cylindrical rollers.A roller is supported by a fixed bearing and a roller is supported by a movable bearing.The electric motor drives the two rollers to rotate relative to each other.The material is crushed by the friction of the two rotating rollers, and the broken material is discharged from the two rollers by gravity.The spring is sufficient to balance the pressure between the two rollers.If there is a non-crushing falling into the two rollers, can push the bearing compression spring to create a large gap to make the non-crushing thing through, after the non-crushing thing through, the spring can make the gap between the two rollers to maintain the original size, continue to work.
The characteristics of
1. Equipped with a roller crusher in the mineral grinding production line, the grinding equipment can give full play to its production capacity, generally increasing the output by 30%-40% and reducing the total energy consumption by 20%-30%.
2. Compact structure, light weight, small size, for the same production capacity of large requirements of the grinding system, the equipment of the roller crusher can significantly save investment.
3. Simple structure, small space, convenient operation and maintenance.
4. It is equipped with dust proof plate, with good sealing performance, which can avoid the spatter of small materials after crushing, with less dust, low working noise and better working environment.

5. The weight of the abrasive roller is newly optimized, the equipment does not need to change the mill roller for life, while the old roller machine needs to be dismantled for overhaul and replaced after being used for one year.
6. The roller crusher is equipped with a replaceable wear-resistant lining plate. The wear-resistant lining plate is made of domestic advanced wear-resistant materials, which has the advantages of long service life, not easy to damage and convenient maintenance.The continuous service life can reach more than one year, if the wear is serious, remove the boot cover can be replaced.The maintenance quantity is small, the cost is low, this is any other type of domestic crusher is incomparable.
7. The roll crusher is equipped with safety protection device. When an unexpected metal iron piece enters the crushing chamber, the protection device will move and the iron piece leakage device will operate normally.
8. The gap of the abrasive body of the roll crusher can be adjusted arbitrarily between 1mm and 20mm. After the gap is adjusted according to the requirements of the crushing particle size, the crushing particle size can be controlled reliably, and all of them can be discharged under the crushing chamber with the ideal particle size.
9. Simple and reasonable structure, low operating cost, smooth operation, high efficiency and energy saving, high crushing efficiency, adjustable discharging particle size.
10. Roller crusher is the working principle of low speed and high pressure roller extrusion.The material from the upper part of the crusher falls vertically into the crushing chamber. Under the pressure of crushing caused by the strong pressure generated between the two rollers, most of the material has become powdery, and a large number of cracks have been generated in the interior of the remaining part of the granular material.In the course of further crushing, the grinding energy consumption can be greatly reduced and the output can be increased.

Techinical datas of double roller crusher:


Precautions
1. Strengthen the work of removing iron from mines. Non-broken objects (bits, etc.) falling into the pair of rollers will damage the crusher and cause a parking accident. Therefore, an iron removal device should be installed before the crusher.
2. The viscous material is easy to block the crushing space. When dealing with the blockage fault, it should be stopped for processing, and it is not allowed to poke the ore during operation.
3. When the processed material contains a lot of large lumps, be aware that large ore is easily squeezed out from the crushing space to prevent injury to people or damage to equipment.
4. After the roller crusher runs for a long time, due to the large abrasion of the roller surface, it will cause the product size to be too fine. At this time, attention should be paid to adjusting the discharge port or overhauling the equipment.
5. Strengthen the inspection of the equipment, add oil to the lubrication parts of the equipment on time, and keep the equipment in good lubrication state.
Tooth-roller crusher Tooth-roller crusher start-up safety technical operating procedures
Prepare
1. Check whether all parts are complete and in good condition.
2. Check whether the safety devices, lighting, and signals are intact.
3. Check whether each oil volume is sufficient, the oil volume should be appropriate, the oil quality should be clean, and the lubrication should be good.
4. Check whether there are foreign objects in the crusher.
5. Check whether the buffer device is flexible and reliable, whether the load pin is intact, and whether the dust-proof and spray device is working.
Running
1. The crusher must be started without load.
2. After receiving the start-up signal, first start the material receiving equipment, and then start the crusher. After the current drops to the normal value, it will be put into formal operation, and spray dust at the same time.
3. Frequently check whether the temperature of the motor and bearing is normal, whether the current indication is within the required range, whether the crusher's operating sound is abnormal, if accidents and hidden dangers are found, stop immediately, and send an emergency stop signal to the dispatching control room and related posts.
4. It is strictly forbidden to open the observation hole during production to prevent the material from flying out and hurting people.
5. Check whether the particle size meets the requirements, and report the serious over-particle phenomenon in time.
parking
1. After receiving the stop signal, stop feeding the crusher; stop when the crushed materials are empty, and stop the dust spray at the same time, and send a stop signal to the relevant posts.
2. The accident stop should also be started after removing the materials.
3. Do a good job in the inspection and maintenance of the equipment after parking.
Use maintenance and precautions
It must be started under no load. Before starting, carefully check the use of each component, the elasticity of the spring, the tightness of the belt and sprocket, and the lubrication of the bearing bush.
When in use, the standby device must be started after normal operation before feeding, and it must not be started after feeding. When shutting down, wait for all materials to be finished, and no remaining materials can be stored in the hopper to prevent damage to the machine due to misoperation during the next startup. In order to ensure the long-term good use of the machine, it is necessary to frequently add oil to the various parts. The bearing housing is equipped with copper bushes, which are used after adding engine oil before each shift. The 200x125 and 200x150 bearing housings are the bearings, and calcium-based grease is added every three months, and the chain is refueled once a week. Add calcium-based grease to the sprocket shaft every fifteen days. The chain is thoroughly cleaned with diesel fuel once a month.
Check the usage of the roller frequently, and the roller should be smooth and clean, free of pits and large scratches. If the above situation occurs, replace the roller with a new one. When adjusting the gap between the rollers, first tighten the adjustment handwheel, then loosen the handwheel, and adjust according to a distance of 3 mm for each rotation of the handwheel. When adjusting to a proper gap, tighten the nut. Prevent improper adjustment from making the pair of rollers non-parallel, resulting in partial wear of the bearing bush. When feeding, check carefully to prevent super-hard materials and iron from entering the machine. It is strictly forbidden to troubleshoot during operation, and strictly forbid any cleaning work. You must stop feeding the machine before stopping, and stop the machine after all the materials in the standby device are crushed.
Frequently check the V-belt and sprocket chain used in the crusher. If the damage reaches 30%, all must be replaced with new ones. Do not mix the old with the new ones.
The roller crusher is thoroughly overhauled once a year.