Main Parameter Calculation And Structural Analysis Of MQY64110 Overflow Type Ball Mill

As a kind of the most important grinding equipment,Ball mill is widely used inmetallurgy industry,cement industry,construction industry,glass industry and so on.Especially,with the rapid development of our country,there is strongly demand for ball mill in industrial production and infrastructure areas.In order to improve the grinding efficiency,and also to reduce the cost,the grinding equipment presents the characteristics of large scale,and the application of ball mill over 6 meters has matured.In the past,the design of ball mill usually adopts the method of analogy,therefore,the quality of the design result completely depends on the experience of the designers.For the large mills with a shell diameter of 6m or more,this approach may not only make some products too safe and bulky,but may also cause insufficient design strength which will affect the design life of the mill.Taking MQY64110 as the research object,this paper has studied the main parameter design method of large scale ball mill,and also the finite element analysis has been carried out according to the structural characteristics and stress state,what is in order not only to improve the reliability and safety of the equipment,but also to improve the design efficiency.Through the study of actual production and running state of the current mill and comparison of the characteristics of different mills,this paper has analyzed and discussed the not only current situation but also the trend of development about ball mill in the domestic and overseas.This paper has presented the structure of ball mill,stated the important parts in detail,and laid out the crushing work principle of ball mill;meanwhile,this paper has studied the running state of the ball mill,inferred the motion track of the steel balls,and obtained the conclusion that the stress forced on the ball mill is less than or equal to the maximum static condition when it operate;This paper has analyzed the main working parameters of the ball mill,and calculated the main parameters of the MQY64110 overflow ball mill.At the same time,this paper has stated selection method of ball mill,deduced the determining method of the optimal operating speed of mills,presented the current calculation method of ball charge,obtained the calculationmethod of the effective power,and calculated the main parameters of MQY64110 overflow type ball mill;Taking MQY64110 overflow ball mill as the object of study,finite element analysis is carried out on the rotary and correspondingly contacting bearing parts of the mill.At present,in order to avoid the non-linear calculation,most of the analysis methods of mills are only analyzing the rotating parts instead of the whole analysis which will not simulate the correct force at the hollow shaft,however,in this paper,it has established the contact between the bearing and the hollow shaft in order to simulate the force and displacement of the hollow shaft,the end cap and the shell more accurately by means of the ANSYS software.so,the simulation result is more reliable.The research on structural strength of MQY64110 overflow type ball mill provides theoretical support and experience accumulation for the future structure design of the ball mill.This research also shows the stress distribution of each part of MQY64110 overflow ball mill and the safety coefficient distribution range of each component.At the mean time,it is clear that there is a large safety margin among hollow shaft,end cap and bearing,which would be optimized in the later project.Considering the low safety factor of the drum,it is the fact that the optimized design will be considered in the future.