共查询到19条相似文献,搜索用时 375 毫秒
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大破碎比颚式破碎机及对破碎工艺流程的变革 总被引:4,自引:1,他引:3
介绍了新型破碎设备--外动颚大破碎比颚式破碎机及该系列产品的技术参数、性能特点;可用一段大破碎比破碎机取代传统流程中的两段或三段破碎,新型破碎设备的研制成功带来了破碎工艺的变革。 相似文献
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双腔颚式破碎机动态破碎力分析 总被引:1,自引:0,他引:1
为提高双腔颚式破碎机破碎力计算的准确性,使用速度瞬心法,分析双腔颚式破碎机偏心轴旋转360°动颚的运动规律及破碎腔的变化规律,提出有效破碎腔折算系数,并对破碎力的变化规律进行分析.结果表明,破碎力随有效破碎腔的变化呈周期性变化,修正了最大破碎力计算公式,得出双腔颚式破碎机在偏心轴转至(水平向右逆时针转起)170°时左腔破碎力达到最大值,转至350°时右腔破碎力达到最大值.对完善双腔颚式破碎机的基础理论有重要意义. 相似文献
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破碎是工业矿物加工领域中的一个重要环节,双辊式破碎机是矿山机械中应用非常广泛的一种设备。本文通过对新型的双辊振动破碎机进行设计研究,提出了双辊振动破碎机有待解决的关键问题;确定了双辊式破碎机的总体设计方案,对辊简直径和转速进行了设计计算,并对双辊振动式破碎机的关键部件振动冲击辊筒进行了设计研究;最后确定了双辊振动破碎机轴的最小直径。 相似文献
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破碎设备网络化在线状态监测与故障诊断系统 总被引:2,自引:0,他引:2
应用虚拟仪器技术进行破碎设备在线监测与故障诊断,并用网络技术实现数据的网络传输和远程监测.利用NI公司提供的G web Server实现系统监测显示面板的网页发布,利用Datasocket技术快速实现监测数据的网络传输.LabVIEW和网络技术的结合可以方便客户获取检测图像和检测结果.本系统在对破碎设备主要性能参数(如破碎机水平轴扭矩,振动,速度,间隙,温度,压力,流量等)的在线检测和远程故障诊断上均取得了较好的效果. 相似文献
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四辊破碎机和对辊破碎机是钢铁厂的烧结燃料破碎设备。当燃料粒度达不到工艺要求时,原料出现偏析,不但造成烧结矿过烧而且对设备造成严重损坏。邯钢新区设备动力部着眼于各指标表象,分析指标变化原因,并牵头炼铁厂与设备动力部联合对烧结矿燃料粒度攻关,成功解决了烧结机台车蓖条、隔热件严重烧损、废气温度过高造成的各种问题。 相似文献
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《中国粉体技术》2019,(3):65-71
针对3种形状的岩石样本进行3D扫描,得到岩石外形的云点数据,构建了异形岩石几何模型;结合高倍显微镜观测的岩石岩相,定义了岩石颗粒间的粘结模型和接触模型,建立了异形多级颗粒的力学模型;基于EDEM软件,在振动慢剪破碎试验机上进行数值模拟试验,并统计岩石破碎后的岩石产率。经与破碎实验结果对比分析后的结果表明:岩石粒度分别在<4、<8、≥8 mm时,数值模拟试验与破碎实验得到的岩石产率与外锥转速的关系曲线趋势基本一致;破碎机在外锥转速为45 r/min、内锥频率为40 Hz时岩石产率最大、破碎效果最佳;数值模拟试验与破碎实验的相关系数分别为0. 95、0. 97和0. 97,建立的异形多级颗粒模型能够较好地模拟岩石破碎机理。 相似文献
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论述了粉碎机构学是由机构学衍生而来,与相关粉碎理论结合,应用于物料粉碎领域里的一门工程基础学科。随着矿产资源高效节能开发和诸多领域的粉碎作业增多,对粉碎机械的使用要求不断发生变化,粉碎机构学越来越成为重要的基础理论,并逐渐形成新的学科分支。随着现代机械设计理论的发展,粉碎机构学理论也将在实践中不断得到丰富、发展和完善。 相似文献
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The collapse characteristics and energy absorption capability of composite tubes made of 759/5224 woven glass cloth/epoxy with different fiber orientations were studied in the present article under axial quasi-static and impact crushing condition. The effects of fiber orientation and loading condition on the crushing modes and energy absorption capability were discussed in detail. The fiber orientation could be found to have significant influences on energy absorption performance. Based on results, the energy absorption capability could be improved by selecting proper fiber orientation. The energy absorption capability in impact crushing tests could be found to be slightly lower than that in quasi-static crushing tests. 相似文献
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工业炸药生产中的粉碎理论及其技术 总被引:3,自引:3,他引:0
粉状工业炸药的原材料粒度影响其混合效果和爆炸性能,文章就与工业炸药生产相关的粉碎理论及技术进行研究.讨论了用机械力粉碎物料的几种方法,介绍了粉碎后物料的粒度分布的测定方法,对工业上常用的干法粉碎和湿法粉碎的设备结构和粉碎特点进行了分析对比.建议在进行工业炸药的工艺与配方研究的同时,注重用于粉状工业炸药生产的粉碎设备装置的应用开发,以促进工业炸药生产技术整体水平的提高. 相似文献
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During ship collision and grounding, the crushing collapse of a thin-walled structure subjected to compressive loads is one of the important failure mechanisms. Non-linear finite element method (FEM) is a powerful tool for analyzing large deformation plasticity problems. In this paper, the effects of longitudinal and transverse stiffeners on the quasi-static crushing of stiffened square tubes, which have relatively light stiffeners, are studied with non-linear FE program LS-DYNA. Based on the experimental data and numerical simulation results, new formulas for equivalent plate thickness and the mean crushing load are developed. The prediction of the mean crushing load is in good agreement with the experimental data. 相似文献
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Braided composite had been proven to have a great potential as energy absorber. However, the past studies done were limited to synthetic fibre as the reinforcement composite. In this study, we focused on a natural fibre, namely basalt, as the reinforcement material. The effects of braid thickness, braid angle and braid tow density of the basalt composite tube subjected to quasi-static crushing response were investigated. Crushing failure mode had been observed in comparing those braid parametric effects. Moreover, the analysis of variance was used to analyse the main and interaction effects subjected to specific energy absorption (SEA) response for the test. Three crushing modes had been observed. The splayed and diamond shape of progressive folding were reported for the braid angles of ±30° and ±45°, respectively, and fibre micro-cracking mode effects for the ±60° braid angle. Furthermore, SEA increased with the decrease of braid angle and increase of diameter-to-thickness ratio. On the other hand, the highest braid angle demonstrated the lowest crush efficiency and poor triggering crushing progression. 相似文献
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On the effect of geometrical designs and failure modes in composite axial crushing: A literature review 总被引:1,自引:0,他引:1
Composite materials have been known for its low density, ease in fabrication, high structural rigidity, and wide range applications, i.e. aeronautic applications and automotive industry. Due to this, extensive studies had been conducted to evaluate its axial crushing ability to replace metallic materials. In this paper, it reviewed the usage of fibre reinforced plastic composite (FRP) as an energy absorption application device. Failure modes and geometrical designs such as shapes, geometry and triggering effect have been studied where these factors affected on peak load and specific energy absorption significantly. Accordingly, numerical analysis for axial crushing of affected factors had been simulated to predict the failure mechanisms of FRP composites. 相似文献