Abstract
Dynamic characteristics analysis on shearer drum is an important aspect in shearer design and a well-structured shearer drum provides better performance in vibration reduction and service life extension. To make reference for structure improvement, many researchers have focused on the dynamic analysis on cutting pick. However, the simplified model such as single pick, linear motion and continuous coal in the previous study made it divorced from actual situations underground. On basis of this, the model of shearer drum with several arranged picks and the coal model with some distributed rock have been set up in order to consist with the real working conditions. Through simulation, it can be found that the mean force in X-direction is little influenced by rock distribution, but the peak force in X-direction fluctuates greatly under different rock distribution. During the analysis on the peak force, it can be found that this kind of force could be cut down effectively when the rock was distributed on the top of the shearer cutting range. Based on these conclusions, we can program the cutting strategy to lower the influence of cutting forces on the shearer and its drum in the future.
Highlights
Shearer drum is one of important parts in the comprehensive mechanization mining equipment, and the economic and production efficiency in coal mine can be kept when the drum works under steady conditions
We have studied the influence of rock distribution on the continuity of coal cutting and we focus on the influence of rock distribution on the interaction between conical picks and rock
To ensure the reliable results of this simulation, the model in the paper was set up based on shearer drum applied in actual working conditions and with this model, the dynamic process of coal cutting can be replicated in convenience
Summary
Shearer drum is one of important parts in the comprehensive mechanization mining equipment, and the economic and production efficiency in coal mine can be kept when the drum works under steady conditions. According to induction on the existing references, dynamic analysis on shearer drum usually started from the following three aspects, and they are theoretical research, simulation analysis and experiments Of all these theoretical studies, many other theories are developed based on the theory proposed by Evans in 1984 [3]. Most researchers focused more on the structural optimization of cutter or the rationalization of working parameters [16, 17], and the model of cutter and coal were assumed to be even and continuous [18, 19] On basis of these results, some cutting strategies, which are able to decrease the load fluctuation, can be gotten and will be helpful for those who make structural design on shearer drum if the rock is required to be considered
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