A Study on Thermal-Structural Analysis for Shearer Ranging Arm

摘要

In order to clear the state of shearer ranging arm shell under different temperature and load, a finite element model of the shell was established by analyzing an actual working condition, and the shell thermal boundary conditions are determined by combining with an actual working condition, then the thermal-structural analysis of the shell was carried out, according to analysis results, in working condition the maximum stress increasing 30.3% and the deformation increasing 94.7%, compared with regardless temperature field, which means that the shell stress and deformation are greatly affected by the thermal load. The loading test result indicates that temperature field attaches the great significance to ranging arm stress and deformation, and the analysis results of thermal-structural model for the shell are better able to reflect the change rule of the shell stress during the actual working process. Besides those, the parallelism error of the bearing axis caused by bearing holes deformation was analyzed. Furthermore, the influence caused by the parallelism error of bearing axis was calculated; its value was 61.5% of the permissible tolerances, which provides a guide for the size accuracy design of the bearing holes of the shell, meaning that the driving performance of the drive system was greatly affected by the shell deformation.