Optimization design of shearer's spiral drum under the condition of coal seam with gangue
The spiral drum is liable to failure when the shearer works in coal seam with gangue.To improve the reliability of the spiral drum,this study optimized its design based on the rigid-flexible coupling technology,reliability sensitivity design theory and dependent failure theory.Based on the coal breaking theory,the instantaneous load of the spiral drum was simulated numerically and a rigid-flexible coupling virtual prototype model of shearer was established,by which the indexes of the weak area,stress and vibration performance of the spiral drum were obtained.Combined with reliability sensitivity theory,the stress reliability,amplitude reliability and dynamic and gradient sensitivity results of key parts were analyzed.Based on the dependent failure theory,the reliability sensitivity of multiple failure modes related to the drum and the design variables of the drum were obtained.Based on improved genetic algorithm,the reliability optimization design of spiral drum was carried out.The results show that the comprehensive reliability of the spiral drum is increased from 0.888 5 to 0.977 5.With a reduction in all the absolute values of the sensitivity of the design variables,the optimized spiral drum is more robust and its comprehensive reliability is improved.The proposed optimal design method for shearer's spiral drum in coal seam with gangue provides an effective way to design efficient spiral drums.
coal seam with gangueshearerspiral drumoptimization designgenetic algorithm
万方数据
维普
