Square Feeder Numerical Simulation And Dynamic Simulation Analysis

With the change of the national energy strategy,The proportion of coal used for power generation is increasing.However,the energy conversion rate of coal has not been greatly increased,and resource waste and environment caused by the use of coal resources have been increasing.Pollution has become a key issue for the country and the local government.Therefore,in order to increase its power generation efficiency,reduce waste of resources,and reduce environmental pollution,it is necessary to upgrade the power plant's power generation equipment.Feeder is an important equipment for feeding and discharging materials in power plants.Its performance directly affects the power generation efficiency and production safety of power plants.This paper combines the research and development issues of feeders of China Datang Environmental Industry Group Co.,Ltd.Through on-the-spot observation and analysis of the experimental model,based on theoretical analysis and finite element method analysis,theoretical calculations and finite element checks were performed on the structure and performance of the feeder,and its structure was improved to obtain the final production requirements.Technical parameters and structure.The main content of this article includes: 1.The article has conducted in-depth research on the development process and latest technologies of feeders in this field both at home and abroad,summarized the problems still existing in feeders and proposed corresponding solutions.2.Comparing the advantages and disadvantages of the traditional unloading trench and the new unloading trench,and improving the structure of the traditional unloading trench,the design of the structure of the square feeder and the initial selection of materials,and the construction line for the blade The characteristics of the arc,number of spirals,Archimedes spiral and involute are explained.The advantages and disadvantages of different curve construction lines as the blade busbars are compared.Finally,the arc curve is selected as the construction line of the blade.3.The main motor power of the feeder is theoretically calculated and checked by finite element.The internal friction coefficient and external friction coefficient of the power plant coal are measured by the direct shear method and based on the test data,the normal operating conditions The load on the blade is analyzed,and the load torque of the impeller is calculated.Based on this,the power of the feeder under various working conditions is calculated,and the calculated results are checked with the finite element method.Finally,the three-phase AC The motor model is compared and the motor model is selected.4.Based on the selected material and the determined structure of the feeder impeller blade,perform finite element analysis on its stiffness,strength and fatigue,and obtain that the established structure and the selected material cannot meet the normal production requirements.Based on the calculated results,a series of amendments were made to the material and structure of the blade,finally reaching the required requirements.5.Using the Lagrangian multibody dynamics equation to calculate the impeller driving torque and travel driving force of the feeder,the dynamic model was obtained,and the dynamics of the mechanism was simulated with the finite element software to verify the dynamic model.The reliability.The calculation method of square feeder's motor drive power,simulation of virtual prototype dynamics,and method of checking rigidity,strength and fatigue of key components provide an important reference for the design of square feeder.