Yash Enterprises Manufacturing VSI as Following Types :-
A) Stone On Stone Rotor feed & side feed.
Rotor and Crushing chambers are so designed stone layer gets formed on the crushing chambers which act as breaking walls for stone coming out of rotor at the same time stone feed from the side of rotor also act as breaking walls for stone coming out of rotor. In the said construction wear cost is considerable low however production rate is low.
B) Stone to Metal Crushing.
In the crushing chamber high wear resistive and good impact metal block/anvil ring is located which act as breaking wall for the stone coming out of rotor. at the same time rotor side feed stone also act like breaking wall. in the said case due to metal wear cost is more however production rate is very high.
Working Of VSI ( Vertical Shaft Impactor )
V.S.I. Means Vertical Shaft Impactor and similar to centrifugal pump. Perticular sizes of stone are feed in the center of rotor and same stones are thrown away from rotor. The thrown out stone from high-speed rotor gain kinetic energy and peripherals speed 60m/sec approx. around rotor axis. There stones with high momentum hit each other and meatl block and parts of material feed out side the rotor in the crushing chamber. The final stone breaking / rupture is due to impact incrushing area. Thus disintegration takes place and the said moving stone particales fall down due gravity towards conveyor belt & then with vibration screen seperation of material is done & oversized re-feed in the rotor.
Various aspects of V.S.I.
1.Stone on stone primary stone shaping and not crushing. hence heavy size reduction is not possible in the said process final reduction is achieved in three to four
passes even more passes for hand stone.
2.The more passes result shaping and final product is more cubical than other crushing.
3.The more passes require more recycling load and more energy is consumed in recycling the material.
4.Throughput capacity of machine is approximately 5 times in put capacity. This means of VSI of 100T.H.P. Throughput capacity will have 20 T.P.H. Throughput capacity
will have 220 T.H.P. out put capacity, therefore while selecting re-circulating system one has to select on the basis of throughput capacity of machine.
5.Uniform un-interrupted feed give more output and shaped cubical product.
6.Ensure no oversized material is through the material is through the machine, which can result in heavy wear part damages & heavy blows to rotor and some tomes
heavy breakdown & heavy losses
7.in some machines higher rotor speed is selected for finer products.
8.In VSI material on material flow is continues and hence wear/tear of part is low as compared to conventional impactor.
9.the higher capacity VSI twin motor drive should properly design for the required sharing cycle.
10. in VSI, Lubrication is most important with proper temp. indicator and proper external cooling whereas is possible. Negligence on lubrication may result in heavy
breakdown and losses.
11. power connected to VSI is important and its over loading/under loading is directly proportional to out put capacity. hence for more out put should not taken even
through machines gives.
12.Wear, tear & electricity cost is un-avoidable, and its calculation is to be studied in respect of final out put.
