mineral sizer crusher is a kind of efficient crushing equipment, which is widely used in coal, chemical industry and other crushing operations. Roller teeth are its main working parts, directly contact with the material. Therefore, the design quality of roller teeth is directly related to the production efficiency and service life of mineral sizer crusher.
In the crushing process, it is inevitable to encounter hard and difficult materials such as iron block, which will lead to turning and bring great impact to the roller teeth. This factor should be considered in the design to make the equipment safe and reliable. However, there is still a lack of feasible calculation methods, more rely on the experience of designers to carry out. In this paper, the finite element method is mainly used to simulate the process of sticking, trying to provide a more effective strength analysis method.
1. Technical parameters of mineral sizer crusher were selected to calculate working conditions
Model 2PLF 6060
Feeding size /mm300
Discharge size /mm
60 roller speed /r-min150
Motor power /kW 25
Crushing strength /MPa≤120
When Mineral sizer crusher are working normally, some hard foreign bodies, such as iron, suddenly fall into the teeth of the roll and cause them to become stuck. The foreign bodies are caught on the tip of three staggered teeth of the two-tooth roll. Only one tooth of one of the teeth is subjected to force.
Mineral sizers have a simple structure. One crushing roller, coupling, reducer and motor are used in the calculation. For convenience of calculation, the model is simplified. Mineral sizers crushing roll uses a disc structure. There are five discs in total.
Gear plate: When the speed of gear plate is 50r/min, its angular velocity w=xn/30=5.23rad/s. Card iron: constrains its three translational degrees of freedom
Result analysis: It can be seen from the dynamic demonstration process in post-processing that when the roller teeth of mineral sizer crusher collide with iron blocks, the roller suddenly stops rotating, and the stress value rapidly rises to a peak and then falls back down. The large Mise stress of the gear roll is concentrated in the tip of the gear, and the maximum Mise stress value is 782MPa(exceeding the yield limit of the material). The mise stress value of other positions is 150MPa