双腔颚式破碎机破碎力的研究

破碎力是破碎机重要的基本参数之一。本文通过分析双腔颚式破碎机结构特点，推导了齿轮固定点的轨迹方程。对各杆件进行了运动分析，并 建立了破碎力的计算公式。     

Material Flow in Jaw Crusher

Jaw crusher is a kind of machine widely used in mining and aggregates industry,but it still has some shortcom- ings,such as liners wear,terrible power draw etc.The lack of research on material flow strongly limits the design improvement. The size reduction of the jaw crusher relies on the moving jaw movement that is a kind of complicated swing.Based on the move- ment analysis of the moving jaw and the single particle breakage characters,the material flow is analyzed.The measure of the breakage force is carried out.Material flow analysis is partly confirmed by the experimental results and some new information is also learned from the crushing force distribution.The job on the material flow will be helpful to the jaw crusher design improve- ment.     

CJ815型颚式破碎机在杏山铁矿的应用

针对杏山铁矿的生产规模及矿、岩的破碎提升方案,探讨了井下粗破系统山特维克CJ815型颚式破碎机的工作原理和电控系统,给出了破碎系统的实时监测界面并进行分析。结果证明,CJ815型颚式破碎机技术水平先进,性能可靠,自动化水平高。     

复摆颚式破碎机机构参数的优化设计

本文针对目前复摆颚式破碎机的机构参数、结构形式不统一,造成产品机型混乱和材料、能源浪费的问题,提出了复摆颚式破碎机的机构参数优化的数学模型。经用复合形法计算表明,优化后的破碎机可大幅度提高衬板的使用寿命和提高生产率。本文还根据某选矿厂采用颚式破碎机破碎煤炭的使用情况,提出生产中轻型颚式破碎机的构想。     

Application of analytical hierarchy process to selection of primary crusher

Selection of crusher required a great deal of design based on the mining plan and operation input. Selection of the best primary crusher from all of available primary crushers is a Multi-Criterion Decision Making (MCDM) problem. In this paper, the Analytical Hierarchy Process (AHP) method was used to selection of the best primary crusher for Golegohar Iron Mine in Iran. For this reason, gyratory, double toggle jaw, single toggle jaw, high speed roll crusher, low speed sizer, impactor, hammer mill and feeder breaker crushers were considered as alternatives and capacity, feed size, product size, rock compressive strength, abrasion index and mobility of crusher were considered as criteria. As a result of our study, the gyratory crusher was offered as the best primary crusher for the studied mine.     

复摆颚式破碎机颚板运动及磨损分析

颚板是复摆颚式破碎机的主要工作构件,在破碎物料的过程中经受物料的严重磨损和激烈的冲击作用,颚板的寿命成为工程上关注的问题．通过对颚式破碎机颚板的运动分析,并结合物料的流动受力分析,颚板表面的微观及失效等磨损机理对颚式破碎机颚板的磨损进行了分析,从而得出了物料破碎时颚板磨损的原因,为提高颚板使用寿命寻求理论依据．     

PEF250×400颚式破碎机动颚轨迹优化

对PEF250×400复摆颚式破碎机动颚的运动轨迹进行分析,以特征点的行程比和偏心轴距为综合优化目标,选取8个设计变量并确定5个方面的约束条件,对动颚运动轨迹进行优化。结果表明,在基本保持破碎机产量的条件下,给、排料口处的行程比明显降低,偏心轴距也得到减小。     

腭式破碎机肘板的研制

腭式破碎机的肘板除推动腭运动之外,还起着破碎工作时的过载保险作用,即当破碎腔中落入不易破碎材料如铁块时,肘板应立即断裂,从而起到保护其它部件的作用．针对腭式破碎机过载时肘板不断裂的问题,在试验的基础上,推出一种Ｃ型肘板,解决了肘板的过载保险问题．     

腭式破碎机肘板的研制

腭式破碎机的肘板除推动腭运动之外,还起着破碎工作时的过载保险作用,即当破碎腔中落入不易破碎材料如铁块时,肘板应立即断裂,从而起到保护其它部件的作用.针对腭式破碎机过载时肘板不断裂的问题,在试验的基础上,推出一种C型肘板,解决了肘板的过载保险问题.     

颚式破碎机机构平衡重优化研究

为了尽量减小颚式破碎机本身惯性力所产生的振动,利用Matlab的优化功能,求出了颚式破碎机机构平衡重的大小和安装位置,使偏心轴回转不均匀性减小,机器及基础所受的振动力降到最低,提高了机器整机的综合性能。     

PE250负倾角复摆颚式破碎机优化设计

本文应用机械优化设计方法在计算机上对PE250复摆颚式破碎机工作机构进行了优化设计,经反复多次计算比较,揭示了通过改变推力板的悬挂方式可以优化出非常理想的工作机构几何参数,动颚排料口处及其上各点的特性值可大大减小,从而可减少衬板磨损,提高机器的破碎生产率和整机性能。     

Crushing performance and resource characteristic of printed circuit board scrap

The crushing performance of printed circuit board （PCB） was studied on several crushers. The results show that PCB is a material which is difficult to crush. The crushing performance of PCB with disk crusher, especially vibration grinding, which has cut or impact action, excels that of jaw crusher or roller crusher. The PCB scrap is worthwhile to recycle using variety of modern characterization methods. When compared with natural resources, this material stream remains a rich precious metal and nonferrous metals. In PCB scrap, metals account for 47% of the total material composition, in which there exists 19.66% copper, 11.47% iron, 3.93% lead, 300 g/t gold and 5 - 10 kg/t silver, etc. In addition, the PCB scrap contains 27% of plastics and 26% of refractory oxides.     

特细碎型复摆颚式破碎机的优化设计

论述了研制特细碎型颚式破碎机的必要性意义，指出只有采用优化设计方法才有可能获得成功。文章还介绍了特细碎型颚式破碎机的优化设计方法、步骤、设计框图及研制出的两种特细型碎颚式破碎机破碎物料后所得产品颗粒的粒度曲线。     

复摆腭式破碎机腔形的优化设计

在分析复摆腭式破碎机破碎腔各截面生产率的基础上,提出了合理的腔形结构,建立了破碎腔的设计模型及相应的优化方法。     

按行程速比系数及两连架杆的三组对应位置设计曲柄摇杆机构

本文创造性地提出了一种按给定的行程速比系数及两连架杆的三组对应位置设计曲柄摇杆机构的新方法，并按该方法进行了实例计算．计算结果表明：本文提出的新方法是行之有效的．     

Liberation characteristics of coal middlings comminuted by jaw crusher and ball mill

The associated minerals make coal middlings possess a relatively high ash content. Subsequent liberation through size reduction can cause recovery increase. However, effect of comminution facilities on mineral liberation of middlings was ignored. This paper studied the liberation characteristics of middlings crushed with different kinds of fragmentation forces. Middlings of ?3 mm + 0.5 mm sampled from a dense medium cyclone were comminuted by a jaw crusher and a ball mill to ?0.5 mm with similar size distribution respectively. The generating mechanism of fines was also analyzed. Full densimetric analyses indicate that mineral liberation of the product crushed by the jaw crusher is better than that by the ball mill at each fraction. For sizes of ?0.125 mm + 0.074 mm and ?0.074 mm, yields of the product with ash content 11% comminuted by jaw crusher are nearly 20% higher than that by the ball mill. Sectional micrographs observed by the scanning electron microscopy (SEM) also show the same law for these two fractions and some intergrowth particles still exist in the fraction of ?0.5 mm + 0.25 mm.     

试论辊压机的转速

辊压机类似光面辊式破碎机,仅就两种破碎作业而论,其根本区别在于两者的转动速度不同。而转动速度不同,则会影响到破碎腔中物料量的变化。因此应用粗碎物料的下落和辊子挤压物料的时间概念,能够从辊式破碎机的转速推导出辊压机的转速公式。根据辊式破碎机的生产资料,可以确定公式中的各项常数,从而得辊压机转速的具体计算式,其结果与实际相符合。     

基于板形性能优化目标的支承辊辊形设计

研究了宽板带轧机辊形设计的原理和方法,提出了一种基于板形性能优化目标的支承辊辊形设计理念,并在某冷轧机组应用所设计的辊形,改善了支承辊磨损,提高了轧机的板形控制能力.     

踏板式自行车传动系统的研究

本文研究采用曲柄摇杆机构联动与链传动组合，以实现脚蹬踏板驱动自行车行驶，并解决了倒车问题。     

PE250X400颚式破碎机机架有限元分析

运用Pro/E软件建立PE250X400颚式破碎机机架的三维实体模型,并将该模型以IGES格式导入ANSYS有限元软件中。分析机架在极限工况下的应力、应变及位移的分布情况,提出结构设计的改进措施,为机架的合理改进提供理论依据.