| The transport equipment of scattered materials is widely used in many departments,such as ports,coal,electricity,and the belt conveyor is the most widely used.The intermediate link of the belt conveyer has played a vital role.In recent years.With the development of science and economic,the belt conveyor equipment gradually towards large scale,low noise,low pollution and high efficiency in the direction of development,so the performance of the transportation system is also put forward higher requirements.In this paper,the discrete element method is applied to study the transport system of a power plant.First,the performance of the existing material transport system is analyzed.The main purpose is to solve the problems of coal transfer system,such as coal plugging,impact,noise,material conveyor belt running and tearing,feeding and so on.The main research contents are divided into the following parts:We analysis the trajectory of material by analyzing the motion process of material on the conveyor belt and transportation system.According to the obtained trajectory curve and the impact angle of the contact area of the transport system,we analyze the force law of the baffle plate under different belt speed and different particle size.Then we compare and analyze the force condition of four different curve shape plate,and get the force law.According to the existing transport system,we put forward the transformation scheme of the curve blanking tube,then we do 3D modeling and import into EDEM software.And we set up the material characteristics of the coal and the conveyer of the belt in accordance with the actual situation.We analyze the influence on the velocity of the material outlet in three directions and the effect on the deviation of the conveyer belt at the lower end.Then a single variable method is used to analyze the velocity of the material at the outlet of the transfer system and the deviation of the material in all directions.We change the structure of the proposed scheme,then we use the orthogonal test of three factors and four levels,and carry on the combinatorial analysis of equal probability.Finally,we choose the optimal combination parameter.We analyze the simulation results and determine the feasibility of the proposed transport system scheme.Finally,we combine the similarity theory,then the transformation scheme is reduced to equal proportions.Then we verify the correctness of the simulation deviation performance... |
