Study Of The Increasing Friction Technology Of Driving Drum's Bionic Surface

Many mechanical transmission devices making use of friction principle are widely used in industrial production. Belt conveyor is a typical application example. In order to improve its transport capacity and prevent the production accidents caused by slipping, it is significant to increase the friction between the driving drum and the belt.Based on the study of flexible friction driving theory of belt conveyors, three methods to increase the friction of the driving drum were proposed. After comparing the cost and the practicability of these measures, the technical scheme which can improve the frictional contact status by designing bionic structure of the drum's lining was determined.Inspired from the biological function of speeling and adhesion, the structural features and adhesion mechanism of the attachment organ such as the foot pad of tree frog, katydid, were researched. The nonsmooth asperity that is a common biological feature was extracted to be the bionic design prototype of the drum's lining. According to the biomimetic principle of structure and function, four new kinds of the lining's surface shape were designed. The solid models of four different bionic linings were built with the software of Pro/Engineer. Based on the theoretical analysis of the non-skid property of the bionic linings, the contact process between the lining and the belt was simulated with ANSYS software. The results showed that the bionic linings could generate embedding and interlocking effect. And different materials of convex hulls generated different effects. The embedding effect of rubber convex hulls was weak, but the ceramics convex hulls'embedding and interlocking effect was obvious.The results of contact analysis indicated that the bionic drum's linings with hexagon convex hulls could generate embedding and interlocking effect. So the contact form changed from plane or cambered surface to meshing contact. The bionic structure achieved the goal of improving contact stability, increasing friction and preventing the belt from slipping.