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The chain drive system is the most important subsystem in a mining scraper conveyor. Compared with the general chain drive system, that in a scraper conveyor is highly coupled. The rings on a chain come in contact not only with the sprocket wheels but also with the central chutes and scrapers. In order to improve the reliability of the scraper conveyor, a contact analysis of the chain drive system based on its meshing properties was performed. Vogit model-based translational and rotating models of the chain drive system were first introduced. A finite element model of the chain drive system was then established. Contact simulations were conducted using the software LS-DYNA. Von Mises stress and contact pressure curves on various dangerous areas of the horizontal ring, vertical ring, and sprocket wheel were obtained. The von Mises stress and the contact pressure of the rings and the sprocket wheel were compared, and their differences were analysed. Results indicate that the maximum contact pressure for the horizontal and vertical rings is considerably larger than the maximum von Mises stress. The maximum contact pressure for the horizontal ring exceeds 2000 MPa, which is 90 % larger than the von Mises stress (1100 MPa). Meanwhile, the contact pressure for the sprocket wheel is considerably less than the von Mises stress. Therefore, the failure mode of the rings and the sprocket wheels differs. Contact analysis based on meshing properties is useful in describing the dynamic properties of the chain drive system in detail. This study provides guidance for overcoming chain break and jam problems in scraper conveyors. (Received in July 2017, accepted in December 2017. This paper was with the authors 1 month for 1 revision.)

Contact Analysis of Chain Drive in Scraper Conveyor Based on Dynamic Meshing Properties