СИЛОВОЙ АНАЛИЗ ПРОЦЕССА ДРОБЛЕНИЯ В КОНУСНОЙ ДРОБИЛЬНОЙ МАШИНЕ

The literature devoted to cone crushers design and research of  its  crushing  process  is  generally  based  on  empirical  observations,  therefore it is commonly considered that material is crushed under  the  influence  of  squeezing  forces  exclusively.  Above  mentioned  liter  ature, in turn, theoretical base forms for crushing units design.  Based on common understanding, variety of designs of cone crushing  machines  existing  today  is  characterized  by  integrity  of  principles of their work. Majority of theoretical works devoted to cone  crushers are focused on such characteristics as efficiency, extent of  crushing, increase in percent of useful fraction in ultimate product,  or  on  operational  parameters  of  separate  structural  elements  such  as lining armor resistance, increase in endurance of supporting and  power nodes, etc. To increase those characteristics crushing cameras with irregular shape of lining armor are designed, design of an  active  crushing  member  combines  elements  of  active  members  of other crushing machines (roll, cheek crushers). However effectiveness of kinematics of active member movement is considered only  from  the  point  of  view  of  squeezing  forces  generation  in  crushed  material  and  minimization  of  its  slide  against  it.  The  uppermost  ener gy brought to any crushing machines is spent on loa ding destroying crushed material. Authors of this article consider that under  particular  circumstances  such  work  conditions  can  be  provided  in  cone crushers under which energy efficiency of materials crushing  process will increase considerably. One of such conditions is creation  of  multi-axial  stress  in  crushed  material.  Some  reference  designs of cone crushers are considered in the article as well as range  of  their  app lication.  Mechanism  of  multi-axial  stress  generation  in  crushed  material  promoting  decrease  in  energy  consumption  of  crashing  process  is  described.  Recommendations  on  development  of  operating  conditions  of  crushing  machine  creating  multi-axial  stress in crushed material are provided.