Abstract：The 3-pass splitter has some problems such as quick wear and short life. According to the angle of repose, a turning plate with a type of ladder swing was designed to prolong its life. The discrete element method was used to simulate the property differences between straight-swing turning plate and ladder-swing turning plate. The results show that the ladder-swing turning plate can stay accumulated materials to form a thickness of material pad and greatly reduce the impact and wear of the material flow on the swinging plate. Compared with straight-swing turning plate, the ladder-swing turning plate has got the material flow impact force value reduced to about 17. 5%, and the sliding velocity value of particles close to board is decreased to about 15. 2%. The experiments verified that the ladder-swing turning plate of the overturn type 3-pass splitter has good impact resistance and abrasion resistance, and it is an effective method to prolong the life of overturn type 3-pass splitter.

Keyword：overturn type 3-pass splitter;swing flap;wear resistance;discrete element method;