A Comprehensive Introduction To Roll Crusher

Roll Crusher, also known as roll sand maker, whose maintenance is a regular work

, and the maintenance work have a direct impact on the roll crushers operation rate and service life. In order to detect the deficiency, eliminate hidden dangers and ensure the normal operation, we should do routine maintenance as well as periodical overhaul, now, let us follow Hongxing experts to see how to maintain it and more effectively improve the crusher efficiency.

Roll crusher is mainly used for the crushing of medium or lower-hardness mines and rocks in mine selection, chemicals, cement and building materials industrial production.

How does roll crusher adjust the output granularity?

There are adjusting devices (wedge or gasket) between two rolls, with adjusting bolts fixed on the top of wedge. When adjusting bolts hang up wedge, the wedge will drive moving roll away from fixed roll. Roll crusher crushes using compression, with two rolls rotating about a shaft, towards the gap between the rolls. The gap between the rolls is set to the size of product desired, with the realization that the largest feed particle can only be 4 times the gap dimension. The particles are drawn into the gap between the rolls by their rotating motion and a friction angle formed between the rolls and the particle, called the nip angle. The two rolls force the particle between their rotating surface into the ever smaller gap area, and it fractures from the compressive forces presented by the rotating rolls.

It appeared in 1806, is the most ancient crusher, which is invented by as English man Thomas. Its roots can go back to the ancient treadmill, which is the prototype of roll crusher. The working principle of treadmill is also the working principle of roll crusher. The treadmill continues to improve in actual production process, evolving to several types, such as the plain-roll crusher, which is used in the metal mine industry; the rod-toothed crusher, which is used in the coal industry and so on. However, the development of traditional roll crusher is limited, making slow progress. In the 1980s, based on research result of Professor Shaw in University Krauss, Krupp Company and KHD Company in German launched the High-Pressure Roll Crusher. The High-Pressure Roll Crusher adopts the high-pressure crushing force, which crushes the material in the contact. The impact in the roller reduces the relative sliding action between the material and the roll surface. The high-pressure force from roll surface to the material improves the working efficiency of crusher and reduces the wear rate of roll surface, making the High Pressure Grinding Roller move towards the industrialization.

After maintenance, please tighten torsional moment when re-assembly upside crushing roller and clamping coupling. In addition, what need to pay attention is that tightening diagonal bolts first, and then tightening the middle bolt, while the coupling gap on both sides of the sub-surface should be uniform.

Symons cone crusher : http://www.best-crushers.com/conecrusher.htm

Ball mills : http://www.crusher-export.com/ball_mill.htm

by: libby

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