关键词: 刮板输送机, 中部槽, 响应面法, 条纹仿生, 耐磨

Abstract: To improve wear resistance of middle trough of scraper conveyors， a bionic middle plate was designed as bionic prototype with scallop shell and pangolin scales non-smooth stripe structure. Based on single factor method and response surface method， wear analyses were performed to explore the optimal parameters of wear-resistant bionics while taking wear depth as response value. Results show that the significant effects from large to small are sorted as follows， width， ratio of width to height and pitch. And the interactions between ratio of width to height and width of stripe are the most obvious. Under certain working conditions（coal particle size of 6~8 mm， load of 20 N， scraper chain speed of 0.65 m/s）， an optimal combination of wear resistance parameters of striped structure is width to height ratio of 4.94 mm， width of 1.81 mm， and a pitch of 6.33 mm. The wear resistance of striped middle plate under the optimal parameter combination was compared with the smooth middle plate through simulations and experiments. Results show that the striped middle plate under the optimal combination of wear-resistant parameters has good anti-wear performance， and the wear mass may decrease 78.54% in comparison with the smooth middle plate. The wear resistance mechanism was analyzed， and it is found that the striped convex body has a diversion and guiding effect on the flow of bulk coal， which relieves the stress on the middle plate surface and reduces the wear depth. 

Key words: scraper conveyor, middle trough, response surface method, stripe bionics, wear resistance