| Screw ship unloader is a type of continuous bulk material conveying machine,which has been affected by the vertical conveying section.The application of vertical screw conveyor has a great significance for the improvement of unloading capacity,yield and reduction of the costs.The key point of using the vertical screw conveyor is that the screw structure and the characteristic of the bulk material.The research of the microscopic and mesoscopic characteristics of the conveying process is made by applying the method of numerical calculation.At the same time,parameters that influence performance are optimized.Finally,the effectiveness has been verified by the experiment.This way promotes the design level of the vertical screw conveyor.When it comes to analyzes the screw conveyor,considering the problem in the aspect of kinematics and force is very necessary to establish the design guideline.Both modern and traditional design method are applied to parameters design.The design interface has been developed for obtaining the goal parameters easily.From the perspective of experiment,the major is virtual prototype and the supplementary is experiment model.The verification of the performance of vertical screw conveyor starts from the key structure such as screw blade,pitch,feeding type and the diameter of screw shaft.The research route for the key structure is from modeling,simulation to result analysis and evaluation.In the work of parameters optimization of screw conveyor,the characteristic parameters of bulk material calibrated first.Secondly,the experiment result from virtual simulation is used to build mathematic model.The optimal algorithm is used to solve it and the effectiveness has been verified by the experiment.Finally extending the material from the single to different type and analyzing the conveying characteristic of different materials,which provides some preference for the practical application of the screw conveyor. |
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