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Therefore, it’s very important that a reasonable choice for the speed of the main cast is expected to increase the life span of the first and to improve the efficiency of the broken [5]. ADAMS through the simulation of the post-processing, the main cast is expected to be the first and greatest impact on average spindle speed impact with the changes in the value of the curve, as shown in Figure 4. By Figure 4 shows that the largest impact in the 1500-1600rpm, as well as 1750-1780rpm are relative large increase, the 1400-1500rpm and 1600-1750rpm are relative stable, while the average impact in the 1400-1450rpm and in 1650-1750rpm Relatively large increase, in the 1450-1650rpm when relatively smooth. As the material is the cube, flat or pointed face with the main cast in the first contact with tip set extra hard, the resulting impact is different, and the largest in the average impact of a sudden change in the speed range, with a narrow face with the main cast is expected in the first collision is very likely, Intensified behind the main material of the head wear, thus affecting the replacement of the main cast is expected in the first frequency, resulting in a great waste. As it can be seen from the chart, the biggest impact will be two orders of magnitude greater than the average high-impact, that is, the material on the main cast is expected in the first moments of great impact. From this we can know, 1400-1500rpm and the 1600-1750rpm is the main force behind the first expected to balance the rotor that it can be a smooth operation of the speed range; reducing the impact of the greatest value and frequency is essential, not only with the structure of the rotor and related parameters Optimization, but also analysis of the feed grain size uniformity and throwing stones at the main material in the first major regional collision. VI. CONCLUSION Speed is the important factor that affects vertical shaft impact crusher broken quality, efficiency, as well as an important factor in life expectancy, but the result is not always broken with the improvement and increases the speed, high-speed also increased the tip set extra hard wear and tear, and seriously affected the life of crusher. Simulation analysis showed that, 1400-1500rpm and the 1600-1750rpm is the tip set extra hard suffered balance force, the rotor can be a smooth operation of the speed range; In addition, in order to fully take into account the crusher broken quality, efficiency and service life, reducing the maximum impact of value and frequency is essential, therefore, we need to take into account not only both the rotor structure and optimize the parameters, but also analysis of the feed grain size uniformity. And throwing stones at the main material in the first major crash to determine the region is also very important, it is worth to further study. ACKNOWLEDGMENT Author thanks that this work is partially supported by the natural science foundation of Shandong Province #Y2007F40 to F. ZHAO and the key subject research foundation of Shandong province grant #XTD0713 to C.S.AI REFERENCES
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