The Design And Analysis Of The Discharge Arm Based On The Quality Control

Spreader is one of the key equipment of continuous and semi-continuous mining complete sets of equipments in open-cast coals. Its performance can directly affect the productivity of the whole production line. In addition, discharge arm is the key components of spreader equipment and is part of complicated hyper-static lattice column with extended end of elastic oblique multi-support and rigid support. The loads acted on the discharge arm are concentrated load and uniform load.The geometry parameters such as arm length, span, the characteristic of supporting parts and structure parameters are important parameters which can affect the mechanical performance. To test the rationality of these parameters, discharge arms are under planned planning on the basis of the thought of design quality control. Different mechanical models are chosen and the optimized design of span is done by the method of orthogonal design.First of all.The elastic supports simplified the more fixed supports of hyperstatic.The support force and stress of the main sections should be calculated.Then,simplified mechanical model of elastic multi-support.Introducetion of five unknown parameters of the hanging points about the unknown bending moment and vertical displacement.According to the angular displacement deformation coordination and supports equilibrium conditions of the hanging points supplementary five equations.So,the hyperstatic problem will be solved. Comparision the results.This two models can be used for the design.The first kind of rigid support model can be used for preliminary design.The second kind of elastic support model can be used in the detailed design.By Orthogonal Experiment Design.Consider the distance of each cross as the factors, each factor in three levels. The maximum intensity and deflection of each cross and the biggest elongation of each elastic supports as the output target.To determine the reasonable spacing.Use Ansys calculation, validating the accuracy of the result.The last result, L2=4.5m, L3=19.5m, L4=23m.