Analysis of longitudinal and torsional vibration of mining scraper conveyor under the over bending section working condition

Abstract

Considering that the scraper will produce longitudinal and torsional pendulum vibration when passing through the bending section, and have a great influence on the motion characteristics of the scraper conveyor, this paper studies the longitudinal and torsional pendulum coupling vibration characteristics of the scraper conveyor under the working condition of over-bending section for the first time. Firstly, the simplified model of torsional pendulum vibration of scraper chain system is established based on Voigt model and point-by-point tension method. Then, the change law of scraper group vibration and chain tension under the condition of scraper bending is studied. Thirdly, through the influence area and attenuation characteristics of torsional pendulum vibration, the thumbnail model of torsional pendulum vibration is constructed. Finally, the longitudinal and torsional pendulum coupling vibration dynamic model of the scraper chain system is constructed based on the torsional pendulum vibration abbreviation model, and the overall longitudinal and torsional pendulum vibration characteristics of the scraper conveyor are studied when the scraper is over the bending section. The conclusion of this paper provides a theoretical basis for better understanding the operation characteristics of scraper conveyor in coal mine.

Dynamic characteristics of scraper conveyor chain drive system under the impact condition of lump coal

“…Ma et al [18] studied the operational wear of the central groove of a scraper conveyor, and simulated the wear of the central groove of a scraper conveyor by establishing a coupled wear analysis model of the central groove of a scraper conveyor. Xie et al [19] investigated the torsional-sway vibration characteristics of the chain drive system under the unilateral stuck-chain condition, and analyzed the simulated application of the stuck-chain load and the causes of the stuck-chain failure. Jiang et al [20] constructed a virtual prototype model of scraper conveyor, and analyzed the dynamic characteristics of the scraper conveyor in the impact conditions, the emergence of broken and jammed chains and other fault conditions by simulation, which provided a reference for the structural optimization design of the scraper conveyor.…”