Kinematics Analysis and Strength Study for Haulage Mechanism of Drum Shearer
|Mechanical Design and Theory
|haulage mechanism sprocket and pin-rail the kinematic character bending strength contact strength improper failure and damage
Haulage mechanism of shearer is the executive device for the machine’s shift. And as soon as it fails to operate, shearer will stop working, which definitely affects regular production and operation of shearer. So this paper studies some preliminary causes for improper failure and damage of the haulage mechanism.Firstly, the kinematic character of the haulage mechanism is analyzed after establishing tooth profile curve’s mathematic equations of sprocket and pin-rail which are the executive device of haulage box. Then the engagement between sprocket and pin-rail is simulated minutely using the software of MSC/ADAMS from two aspects of pin-rail pitch change and meshing center distance change; after the simulation,tramming speed and acceleration curves are obtained, and also the influence of pin-rail pitch change and meshing center distance change on the kinematic character of this transmission mechanism is observed clearly. The last part of this paper is about force analysis of the engagement between sprocket and pin-rail, which mainly studies bending strength and contact strength by the method of FEA. Finally, guiding shoes of shearer, which are the key parts of its haulage mechanism, are simply analyzed for their force analysis under different working conditions.By the overall study, some preliminary causes for the improper failure and damage of haulage mechanism are given, which will provide useful reference for further design and optimization.