Jixie qiangdu (Jan 2016)
THIN SEAM SHEARER RELIABILITY ANALYSIS UNDER COMPLEX COAL SEAM OCCURRENCE CONDITIONS
Abstract
Based on the rigid-flexible coupling multi-body system dynamics theory,built the rigid-flexible coupling model of shearer’s cutting part,researched the annular gear dynamic behavior during the process of meshing. According to the resistance of coal mining machine drum in the complex coal seam condition,generated the text files of the drum load based on Matlab programming. Simulated the model by Recur Dyn multi-body dynamics software,obtained the stress distribution of the shearer annular gear and contact force and contact moment with planetary gear,verified its correctness compared with the theoretical value. Through the fatigue life calculation,obtained the minimum fatigue cycles of annular gear tooth surface. Put forward improvement methods on the weak area and prolong its service life. Analyze its reliability when design could decrease the cost of research,provides a new method for the study of stress and fatigue life of shearer’s equipment in a wide range of rigid motion and small deformation of flexible component motion.
