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Abstract—Rotor is the major work components of Vertical Shaft Impact Crusher and tip set extra hard is the most wearing part of it. Based on the analysis of the structure and the working principles of the Vertical Shaft Impact Crusher, we set up the three-dimensional model of the rotor in Solid Works. Through the importation of the 3-D model into ADAMS for the dynamic simulation, we simulate the throwing process of the materials when the crusher is in operation, then gain the variation of the biggest and average impact force suffered by the tip set extra hard of rotor at different spindle speed. Simulation analysis shows that the speed of the rotor is an important factor that impacts the crushing quality and efficiency of the vertical shaft impact crusher, but the crushing effect is not always rising with the speed increasing and high speed would aggravate the wear and tear of tip set extra hard .The speed range of the rotor is from 1400 to 1500 rpm or from 1600 to 1750 rpm, between which the tip set extra hard suffers balanced force and can operate stably. In addition, in order to fully take into account the crusher broken quality, efficiency and service life, reducing the value and frequency of the greatest impact is of vital important, for one thing, the rotor structure and the optimization of the relevant parameters need to be taken into consideration, for another thing, the impact of the of uniformity of the feed particle size should also be analyzed. 35844
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Keywords-Vertical Shaft Impact Crusher; Tip Set Extra Hard; ADAMS; Load I. INTRODUCTION
In recent years, because of the state's increasing investment into highway and railway infrastructure, there is an urgent need for a lot of gravel. However, the limited natural resources, sand can no longer meet the needs of sustainable development, so the market of mechanism sand is larger ad larger, the growing of the mechanism sand of the market drive by the sand-equipment demand, especially the sand-vertical shaft impact crusher; it has become a hot market. Rotor is the major components of the vertical shaft impact crusher, and tip set extra hard is the most serious damage in all parts of it. Its status not only determines the crusher production quality and efficiency, but also is the primary factor that impacts on the reliability, the service life and cost of the crusher. Data shows that the strength is not the main issue to the effect on service life in China's current application of the vertical shaft impact crusher, the most critical issue is expected to be the tip set extra hard wear [1], firstly, it is expected to be refer to load that it suffers, so the load research of the tip set extra is of vital important. II. WORKING PRINCIPLE OF CRUSHER Vertical shaft impact crusher includes rotor, broken cavity, transmission, frame structure and so on; the rotor is the major component of the vertical shaft impact crusher. As shown in Figure 1. Materials are moved into the crusher from the mouth to feed, the rotor turns with high speed (for the general speed of 1400-1800rpm) under high-speed rotation, ore on the surface of the rotor and the friction-oriented, such as the role of the board with the rotor turning at the same time the role of the outward centrifugal force by the projectile When leaving the main rotor with the material left in the first collision, the ore almost to the edge of a rotor speed of the line outside projectile, the impact on the broken wall and the sub-feeders around the free fall of the crush occurred on the part of the materials, the materials were broken. By the lower part of the nesting population discharged, and the cycle of the formation of closed-circuit screen systems, repeat-ed cycle of the required size of the product [2].
Breaking is the main form vertical shaft impact crusher. After the stones speed up, some of them are shattered when they collide with broken cavity under tip set extra hard’ breaking, the tip set extra hard are wore seriously with the stones’ collision in a long time, after a period of time, they must be replaced, or it not only will affect the effect of breaking, but also the rotor’s body. the body's wear of rotor would affect a dynamic balance, and easily lead to undesirable consequences, such as spindle fracture, and the replacement of the tip set extra hard of vertical shaft impact crusher expects 3000 - 5,000 Yuan, resulting in a great waste. The major wear and tear of the tip set extra hard comes from attracting (wear off after tip set extra hard shown in Figure 2a), each of the material left in the first group is composed of 9 from the actual conditions, each times, most serious wear and tear have three in the middle of 9, in order not to affect the dynamic balance of the rotor, we replace all of them ,it is a big waste ,this need to look at the main cast that is expected in the first suffered by the load, in order to extend the throw. But the testing machine is not a very good simulation of vertical shaft impact crusher of industrial realist, real tests are too time-consuming effort, virtual prototyping technology is a good solution to this problem, and the ADAMS for the realization of the provision of virtual prototyping is a very good platform. III. CRUSHER ROTOR MODEL The main structures of vertical shaft impact crusher rotor (in Sandvik's production RP109) are rotor body, the tip set extra hard, backup tip set, upper(lower) wear plate set, distributor plate, cavity wear plate set, block board, and other materials constitute more than 180 parts. In the rotor inside the body are expected to block 6 plates, which makes the structure of the rotor material at the same time to speed up the formation of dead zones that is expected to reduce the wear and tear their own, with a range of speed, so that the materials took place in the course of broken rotor material from the external automatic the formation of the impact of the wall. In the rotor, the tip set extra hard is expected to head the role of orientation. Through the stones of the rotor speed up the stones, in the form of internal rotor-like swirl through the main material left in the first direction, so that the stones along the rotor to change the direction of the tangent direction of projectile from outside, so that doomed the tip set extra hard is expected in the first major failure. Impact in the form of wear and tear, it needs to feed off the main material of the first special treatment, the tip set extra hard is expected to increase the resistance of the head. It is clear that crushers corresponds to the normal state of the work, when modeling, materials should be in accordance with the internal rotor in the bed after the formation of the actual shape been simplified. The simplified model of the internal rotor is circular, the rotor contact with the material is changed from stone and metal into contact with the stone gravel contacts, after speeding up the stones, they have been thrown out more easily, so except for the tip set extra hard feed off the rest of the first things Components are integrated with the rotor in order to simulate the tip set extra hard throw of the actual work process. Solid Works as a tool to model, and Solid Works to Save PARASOLID file format into ADAMS, into the model shown in Figure 2b. IV. SET THE PARAMETERS AND CONSTRAINTS OF THE MODEL The material set: