These movable bearings are spring loaded to provide a safety relief for excessive pressures such as are caused by tramp iron etc They are drawn up against locating shims which establish the spacing between roll faces discharge setting and are held in that position by the springs which are pre set to the working pressure for which the particular machine is designed This working pressure may vary fromas low as90kiloper linear centimetre of roll face for light duty rolls to as high as 5 3 tonne per centimetre of roll face for extra heavy duty rolls.
So long as flat belts were the established driving medium it was customary to equip the fixed roll with a large pulley and the movable or spring roll with a smaller one generally one half the diameter of the large one The large pulley was designed to carry the full amount of power needed to drive both rolls which of course relegated the smaller one to the status of an idling pulley its sole purpose was to bring the spring roll up to speed and to maintain that speed during idling periods.
There was a logical purpose behind this arrangement Because of the variables involved it would be the exception rather than the rule if both roll faces ran at exactly the same speed under no load conditions and if this slip between faces continued when the rolls were loaded wear on the shell faces would be greatly accelerated The large and small pulley set up permits the material to gear the shell faces together so that the speeds are the same and any compensation that might be required in surface speeds is taken care of by belt slippage on the small pulley.
When the multiple V belt drive came into its own and line shaft transmission was replaced by individual motor drives an improved driving arrangement for crushing rolls was developed V belt sheaves of equal size were installed on both rolls and the load was divided between two motors With this system any speed compensation which may be required is taken care of automatically by increased slip of whichever motor happens to be driving the roll with highest no load peripheral speed.
Although crushing rolls fitted with corrugated shells have been used in some special applications for secondary crushing they are essentially a fine reduction crusher and as such are always fitted with smooth face shells The maximum one way dimension of feed size is established by that point at which the rolls will nip the feed This in turn depends upon the coefficient of friction of the material the diameter of the rolls and the spacing between roll faces.
The diagram in Figure 3 shows the method used in calculating maximum feed size for any diameter of rolls the accompanying table gives a listing of feed sizes for standard diameters These figures are based upon zero roll spacing therefore the distance between faces i e the discharge spacing to be used should be added to them to obtain the maximum feed size for any combination of roll diameter and setting The calculations are predicated on a coefficient of friction of 0 3 which is safe for most materials provided that the surface speed of the rolls is not too high.
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The theoretical capacity of crushing rolls is arrived at simply by calculating the volume of the ribbon whose cross section is the area of the discharge opening and whose length is the peripheral speed of the roll faces per unit of time The formula for material weighing 100 lb per ft3 is.
Several factors enter into the determination of the maximum practicable surface speed of crushing rolls Theseare.
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Mining Processing TWZ Series Double Geared Roller Crusher view more Spare Part read more Lining Plate Support Dish view more Electric Control view more Product Categories Mining Grinding Mining Hoist Mining Processing Construction Material Metallurgy Petrol Chemical.
China Double Roller Crusher Double Roller Crusher Sourcing Guide for Double Roller Crusher China manufacturing industries are full of strong and consistent exporters We are here to bring together China factories that supply manufacturing systems and machinery that are used by processing industries including but not limited to stone crusher roller crusher crusher.
Processible Materials Limestone slag coke coal salt chalk gypsum alums brick tile etc.
Application Range To crush medium and high hardness materials in the industries of cement electricity chemical engineering metallurgy construction materials and refractory matter.
Roll crusher with other names of roller crusher teeth roll crusher or double roll crusher is mainly used for secondary crushing or tertiary crushing of raw materials such as coal coal gangue coke limestone sulfur ore phosphate rock and other materials Its crushing way is roll extrusion and the compression strength of to be broken material does not exceed 80PaM.
Roller crusher is mainly used for general crushing and fine crushing of ores and rocks with high and medium hardness in mineral processing chemical cement refractory abrasives building materials and other industrial sectors.
Roll crusher is with reliable running easy maintenance low running costs adjustable particle size and other features.
The materials to be crushed fall from the feeding mouth to the space between the two rolls after being squeezed and crushed the final products will naturally fall When there are too hard materials or materials that cannot be crushed the rolls of the roller crusher will automatically withdraw under the effect of hydraulic cylinder or spring to increase the gap between the rolls and the too hard materials or the materials that cannot be crushed will fall down thus protecting the machine from being damaged.
There is a certain gap between the two rolls that rotate at the opposite direction and the maximum discharging granularity of the final products can be controlled by changing this gap Double roll crusher crushes the materials by relying on the two round rollers rotating at the opposite direction and four roll crusher crushes the materials by relying on the two pairs of round rollers rotating at the opposite direction.
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Nellore roller crusher processing cement clinker Nellore roller crusher processing cement clinker including hydraulic drives and roller crushers for clinker coolers expansion chambers for silos and reduced power consumption pnmatic conveying systems FLUIDCON have bee standards in the cement industry The Claudius Peters Technikum is a state.
5 Aggregate Production Figure 510 Crusher Feed System A roller crusher Figure 511 is another pression type crusher that simply breaks the material by pinching the aggregates These types of crushers are often found in gravel opera tions Roller crushers have constant maintenance problems and are prone to excessive wear The rollers are.
Roller crusher is mainly used for general crushing and fine crushing of ores and rocks with high and medium hardness in mineral processing chemical cement refractory abrasives building materials and other industrial sectors Roller Crusher Features.
The company covers an area of 18000m2 research and development building of 6000m2 test and processing workshop of 4000m2 and two research centers for wear resistant materials and alloy casting Our goal is to become the RampD technology center of China crusher to provide reliable products and services for global customers and create values.
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