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Product Details

Specifications

stone vertical shaft impact crusher
1)Available in two type: STONE-ON-STONE
and STONE-ON-STEEL

HOW VSI WORKS ?

VSI is nothing but a Centrifugal "STONE-PUMP". Stones are fed into centre of the rotor (like water in the centrifugal pump) & stones are thrown outwards towards the periphery by centrifugal force.

Feed material is fed through a vertical tube in the centre of the horizontal rotor rotating at high speed (60 M/Sec to 70 M/Sec) around a vertical axis. Feed material due to centrifugal force starts picking up speed and it starts getting distributed over the distribution cone & as the material travels over the rotor-vanes, towards the periphery attains the same speed as speed of rotor's periphery. At the instant of alighting from the rotor, material attains a velocity which is the resultant of peripheral velocity and radial velocity (due to centrifugal force) and direction of the resultant velocity is almost 45 degrees to radial direction.

Kinetic energy of these feed particles, is so high that after impact, against the breaking surfaces stresses developed within the particles overshoot their ultimate strengths and thereby particles disintegrate into number of pieces giving rise to new surfaces.

IT IS THE VELOCITY & VELOCITY ALONE DECIDES THE AMOUNT OF FRAGMENTATION

Therefore VSI is in true sense a Pure Impact Crusher which crushes only by Impact. Not like other conventional Impact Crushers, where shear, compression, attrition & impact allocations, play the role in crushing the material.

In VSI there is no gap setting. Crushed material falls through the annular open ring area by gravitational force only.

ECOMAN manufactures both types of VSIs :

a) STONE-ON-STONE

b) STONE-ON-STEEL

STONE ON STONE TYPE : Rotor is so designed that, stone layer gets formed on the vane & breaking surface is also formed by material built up. Thereby reducing the wear on the vanes & also on breaker walls. But this cushioned surfaces, reduce considerably the amount of crushing. But amount of spare consumption also gets reduced.

STONE ON STEEL TYPE : In this type of VSI, material glides on the metallic steel vanes & after getting released from rotor, hits on the metallic steel surfaces. Naturally wear on, vane surfaces & breaker surfaces is high. Bigger feed sizes upto 100-150 are possible. Ratio ot reduction is high.