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首页> 外文期刊>International journal of structural integrity >Finite element analysis and improved design of large-scale belt-conveyor drums
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Finite element analysis and improved design of large-scale belt-conveyor drums

机译：大型皮带输送机鼓的有限元分析及改进设计

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Purpose - Large-scale belt-conveyor systems are extensively used in open mines to continuously transport bulk material. Conveyor pulleys are critical components and failures have significant financial consequences due to extended downtime. Aiming at increasing their durability, two critical spots are identified: the drum and the welds between end-plates and drum. Alternative designs have been evaluated. The paper aims to discuss these issues. Design/methodology/approach - Loads on the driving drum are determined from measurements of the bearing force and the motor power. The friction interaction between belt and drum is described by the creep model and its impact is evaluated by comparing the results obtained for low and typical values of friction coefficient. Alternative designs are analysed using finite element method with optimised variable density mesh. The stress field and the deformations are calculated and evaluated. Findings - Friction affects the torque transmission capacity and force distribution, but it is shown that in this case it has almost no impact on the maximum von Mises stress which occurs on the inside surface of the drum; therefore fatigue cracks initiated there, cannot be visually detected. A reinforcing diaphragm is added at the mid-plane to reduce the stress. A new, improved design is proposed to eliminate welds between the end-plates and the drum. Research limitations/implications - The new proposed design has to be tested in the field to ultimately validate its higher durability. Originality/value - The impact of the friction of the belt on the drum is demonstrated. The reinforcement resulting from a mid-plane diaphragm is quantitatively evaluated and assessed. A new improved pulley design is proposed aiming at significantly increased operational life compared to the one of the current design.
机译：目的-大型皮带输送机系统广泛用于露天矿，以连续运输散装物料。输送带轮是关键组件，由于停机时间延长，故障会造成重大的财务后果。为了提高其耐用性，确定了两个关键点：鼓和端板与鼓之间的焊缝。已经评估了替代设计。本文旨在讨论这些问题。设计/方法/方法-通过测量轴承力和电机功率确定驱动鼓上的负载。皮带和滚筒之间的摩擦相互作用由蠕变模型描述，并且通过比较低摩擦系数值和典型摩擦系数值获得的结果来评估其影响。使用具有优化的可变密度网格的有限元方法分析替代设计。计算并评估了应力场和变形。研究结果-摩擦会影响扭矩传递能力和力分布，但事实表明，在这种情况下，摩擦几乎不会影响转鼓内表面上的最大冯·米塞斯应力。因此，从那里看不到疲劳裂纹。在中平面处增加了一个加强膜片，以减少应力。提出了一种新的改进设计，以消除端板和滚筒之间的焊接。研究局限/含意-新提议的设计必须在现场进行测试，以最终验证其更高的耐久性。原创性/价值-展示了皮带摩擦对感光鼓的影响。定量评估和评估由中平面隔膜产生的增强作用。提出了一种新的改进的皮带轮设计，目的是与当前的设计相比，大大延长其使用寿命。

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