当生产细粒度产品时,物料在振动颚式破碎机的垂直腔室中的运动特征

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摘要

目前,振动颚式破碎机显示出相当高的工艺流程效率。在第聂伯罗科技大学进行了大量的研究,首次证实了使用振动颚式破碎机的可能性,该破碎机具有垂直位置的腔室和颚的摆锤悬挂,作为生产粉末材料的独立研磨单元。在振动颚式破碎机中实现的载荷对物料的高频冲击特性,使得降低了工厂的能耗和金属消耗,提高了破碎程度,可达到100磅的值。然而,材料在垂直工作室内与颚面相互作用的具体过程及其卸载特征仍然未知。该过程的改进是通过实验方法对振动颚式破碎机ВЩД-130的实验室样品使用高速摄影进行的。该破碎机包括主要部件:安装在弹性元件上的机体,破碎爪,通过轴与机体铰接。破碎室的侧壁由与破碎机体刚性连接的透明玻璃墙限制。下颚的垂直运动是由游标的读数决定的。起始材料是大于40毫米的碎片和颗粒尺寸为10…15毫米的大块材料。对物料在整个破碎腔内运动性质的分析表明,需要将振动颚式破碎机的腔室视为两个相互连接的区域:破碎和研磨。对每个区域都进行了进一步的研究。破碎区的生产能力由已知的方法确定。有必要在进一步研究的基础上,建立一个合理的颌面工作轮廓。对研磨区进行研究,可以获得在此期间物料与颚部相互作用的物理图像。在最低位置,在卸载的初始时刻,成品的速度几乎为零。在确定研磨区的生产率时,建议不考虑物料在初始转速下的卸料情况。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Features of material movement in a vertical chamber of a vibratory jaw crusher when producing a fine-grained product
Currently, vibrating jaw crushers show a fairly high efficiency of the technological process. An extensive amount of research carried out at the Dnipro University of Technology made it possible for the first time to substantiate the possibility of using a vibratory jaw crusher with a vertically located chamber and a pendulum suspension of the jaws as an independent grinding unit for the production of powder materials. The high-frequency impact nature of the load on the material implemented in vibrating jaw crushers made it possible to reduce the energy consumption and metal consumption of the plant, to increase the degree of crushing, which can reach the value i > 100. However, the specifics of the process of interaction of the material with the surface of the jaws in the vertical working chamber and the features of its unloading remain unknown. The refinement of this process was carried out by an experimental method on a laboratory sample of a vibratory jaw crusher ВЩД-130 using high-speed photography. The crusher includes the main elements: a body mounted on elastic elements, crushing jaws, articulated with the body by means of axes. The side surfaces of the crushing chamber are limited by transparent glass walls rigidly connected to the crusher body. The vertical movement of the jaws was determined by the readings of the vernier. The starting material was pieces larger than 40 mm and large bulk material with a grain size of 10…15 mm. An analysis of the nature of the movement of material throughout the crushing chamber showed the need to consider the chamber of a vibratory jaw crusher as two interconnected zones: crushing and grinding. Further studies were carried out for each zone.The productivity of the crushing zone is determined by a known method. It is necessary to create a rational profile of the working surface of the jaws on the basis of additional studies. Studies of the grinding zone made it possible to obtain a physical picture of the interaction of the material with the jaws over the period. In the lowest position, at the initial moment of unloading, the speed of the finished product is practically zero. When determining the productivity of the grinding zone, it is advisable not to take into account the unloading of the material at the initial speed.
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