齿辊卸料机密封装置的改进

本文对齿辊卸料机密封装置失效的原因进行了简要分析。介绍了马钢球团厂1^#齿辊卸料机密封装置失效后所采取的补救措施,提出了新安装的2^#齿辊卸料机密封装置的结构改进方案,在实际运用中取得了理想效果。     

移动卸料装置在散料运输中的应用

伴随着散料物流行业的飞速发展,我国的散料装卸运输作业不断增加,对原料装卸运输的要求也不断提高,传统的溜槽分料装置已经不能满足生产要求,开发和研究原料装卸运输的新模式势在必行。本文主要探讨移动卸料装置在散料运输中的应用,分析和研究移动卸料装置的工艺原理和结构,挖掘移动卸料技术的推广价值,推进移动卸料装置的广泛应用。     

防溢料装置在高道卸料小车上的应用

介绍了防溢料装置的构成及工作原理,在高道卸料小车上安装防溢料装置的方法,解决卸料小车溢料问题,提高卸料能力。防溢料装置在各种皮带转运站流槽上的应用。     

烧结机卸料装置耐磨性改善

烧结机导料箱、单辊破碎机和卸料漏斗承载着烧结热矿的导料、破碎与输送,是烧结生产的重要组成部分。高温、重载的工况环境决定着机尾卸料装置必须具有抗磨损、耐高温的特性。针对邯钢1^#435m^2烧结机机尾关键部件耐磨工作面寿命短,更换不方便等问题,分析磨损机理与失效原因,提出改进抗磨工作面结构,升级耐磨材料,优化焊接工艺等措施。通过技术方案的实施,使烧结机导料箱、单辊破碎机和卸料漏斗等卸料装置维持了较高的抗磨损性能,达到了预期的改造效果。     

圆形引伸工件卸料装置的设计与应用

本文论述圆形引伸工件卸料装置的几种结构形式和应用范围，并介绍卸料装置的主要零件——卡瓣的设计方法和思路。     

一种重型皮带卸料小车阻车新装置

本文分析了德兴铜矿大山选矿厂引进的皮带重型卸料小车,在驱动系统发生故障、控制系统失灵时,原阻车装置作用失效,小车脱轨、损坏的原因,提出了在小车头部机架上安装一种新的阻车装置方案并实施,解决了重型卸料小车脱轨、撞坏的问题,确保小车安全可靠运行。     

袋装粉料卸料装置的研究与开发

针对传统袋装粉料卸料装置不能完全将袋子里的粉料卸载干净的问题,将吸头、输送系统、阀门、料气分离缸、压缩空气系统、重力下料器等进行优化升级,卸料装置改进完成后可有效降低人工需求,为企业带来了一定经济效益。     

烟灰卸料装置的改造实践

底吹氧化炼铅生产实践中,为解决灰仓内烟灰倾落喷溅,将烟灰仓下部的棒条阀改为星型卸料装置,烟灰自然重力落灰方式变为定量强制排灰,针对不同温度的烟灰,调整卸料装置转子与壳体之间的间隙等措施,实现了烟灰均匀连续配入,改善烟灰计量室的作业环境,保证了炉况稳定。     

一种抽吸式卸料装置

一种抽吸式卸料装置，涉及还原直底炉或转底式还原炉的金属炉料卸出装置。它包括真空泵、抽气管、冷却器、料仓、导料管和吸盘；所说的抽气管一端连接于真空泵上，另一端经冷却器与料仓相连通；所说的导料管一端与料仓相连通，另一端固定吸盘。料仓中设有挡料网。采用负压抽吸式管道卸料，使耐材间的受力大大减小，将使料车寿命增加；此外，由于吸盘等可采用高温耐材或陶瓷制造，在转底炉情况下，     

焙烧多功能起重机吸、卸料系统的问题与改进

电解铝用炭素阳极在预置焙烧过程中,覆盖保温助燃材料的充填和取出需要机械自动化的吸卸料装置完成。随着生产石墨化过程中温度的不断升高,大部分覆盖保温助燃材料高温燃烧,经常有红焦料进入设备系统中,吸卸料装置能力因过高的温度导致布袋除尘器和罗茨鼓风机效率降低,甚至会导致布袋除尘器和罗茨风机损坏。笔者根据多年实践,分析吸卸料速度和温度控制单元对系统的影响因素,对提高吸卸料速度,防止高温残料对系统设备的损坏具有重要意义。     

阳极板载运车提升卸载装置改进与优化

介绍了贵溪冶炼厂极板转运设备阳极板载运车提升卸载装置的组成及工作原理,并从提升卸载装置缺乏自由度、限位支架损坏摆动撞击、提升装置倾斜重力、硬性碰撞冲击四个方面分析了提升卸载装置产生变形的原因,最终确定是由于提升装置倾斜重力、硬性碰撞冲击导致提升卸载装置产生变形。通过分析,采用加强立板的方式进行改进优化,经计算验证,改进方式是可行的,可以解决阳极板载运车提升卸载装置变形的问题。     

电解槽罩板装卸装置的设计研究

电解槽罩板装卸装置是安装在铝电解多功能起重机上的辅助生产装置。文中阐述了该装置设计研究的重要性,介绍了国内外的研究现状及目前槽罩板的结构形状。文中以一种结构的槽罩板为基础,并综合考虑其他槽罩板的形状进行了设计研究,介绍了该装置的设计方案,详细地说明了该装置的布置形式及结构组成,并对各组成部分的功能及特点进行了分析论述。文中详尽的阐述了电解槽罩板装卸装置的工作原理及工作过程,对夹具装置中关键部件支撑弹簧进行了设计计算,确保了其强度、稳定性及功能。     

Analytic processing elicits right ear superiority in monaurally presented speech

Experiments were designed to assess the performance of an intracorporeal (abdominal) left ventricular assist device (ALVAD) in the presence of induced tachycardias, multiple premature ventricular contractions (PVC's), and ventricular fibrillation in calves. Performance criteria were the degree of left ventricular unloading and the per cent cardiac output assumed by the ALVAD. During synchronous pumping, left ventricular unloading was complete and the entire cardiac output was captured by the device. During induced tachycardias up to rates of 120 beats per minute, these degrees of performance were maintained. At rates in excess of 120 beats per minute, performance declined due to decreased biologic stroke volumes and prosthetic filling times. In the presence of induced PVC's, performance during synchronous pumping decreased because of erratic R-wave sensing. Left ventricular unloading was complete but irregular, and the total cardiac output was captured. When asynchronous pumping was utilized, mean left ventricular systolic pressures increased, but total cardiac output was still captured. During induced ventricular fibrillation, ALVAD actuation maintained cardiac outputs equal to control values for periods up to 5 1/2 hours. These experiments indicate that, during normal sinus rhythm, synchronous pumping is optimal; asynchronous pumping is optimal during complex dysrhythmias; and either can be utilized to support the circulation with varying degrees of left ventricular unloading.     

Advanced Testing and Characterization of Asphalt Concrete Materials in Tension

The modeling of asphalt concrete materials is currently handled using linear viscoelasticity (VE) and viscoplasticity (VP) with damage. Exploratory frequency sweep and creep and recovery test results indicate that the linear VE with damage theory cannot represent the material response unless damage–healing is also included in the formulation. Therefore, the concept of effective stress, used for modeling damage, is extended to include additional nonlinear effects. A new theory of nonlinear VE with damage and VP is presented for uniaxial loading conditions in tension. A special load transfer device is described. It allows very fast unloading and very long recovery periods with complete unloading. It permits better separation between VE and VP components. Using this device, a uniaxial tension creep and recovery test is conducted and analyzed. The nonlinear material response is illustrated and a calibration of the damage function is presented. The formulation is being extended to three-dimensional conditions.     

一种适用于冶金矿山巷道的新型自卸汽车

新型巷道自卸汽车,包括副车架装置、推拉油缸和举升油缸.副车架装置设于车辆的主车架上,副车架装置上设有可在其上表面滑动的车厢装置,推拉油缸设于车厢装置前部以驱动车厢装置移动,举升油缸设于车厢装置中部以驱动车厢装置倾翻.由于车厢和副车架装置接触面均为斜面设计,方便车厢前后移动,同时能减小车厢翻转倾角,提高了卸载效率.该车也适合仓库的散料运输等.     

三种型式的烧结机混合料分料布料装置的设计

采用设计的液压梭式卸料车是正、反向运转梭式布料器及电液(电气与液压动力)动分料器加梭式布料器,解决了单条烧结混合料皮带机为两台烧结机供应混合料时烧结机间的分料及其在混合料仓内的均匀布料.满足了工程项目设计需要.     

第三代篦式冷却机物料锁风阀

新型科位锁风阀──电动弧形阀是采用料位监测装置（即CTS-DFA型射频电容式物位限位开关）控制弧形阀板的卸料动作．保证了既不漏风又节能,而且便于自动控制．     

Pathophysiological considerations concerning uni- and biventricular mechanical cardiac assist

Mechanical assisted circulation by the means of cardiac assist devices is a routine procedure in modern cardiac surgery and cardiology. We investigated the impact of mechanical unloading on regional myocardial "stunning" and the influence of assisted circulation on left heart and right heart failure persevered by an ultimate addition of pulmonary hypertension in experimental set ups. We found that mechanical unloading either during ischemia or in the early reperfusion phase attenuates stunning and enhances the return of synchronous heart performance. In our global dysfunction model we showed that the right heart is dispensable. Sufficient inflow to the left heart is provided unless pulmonary hypertension is present. Also additional left heart support can not overcome the deleterious situation and in select cases only additional right heart support can prevent the "low LVAD output" syndrome. We conclude that mechanical assisted circulation and mechanical unloading are beneficial in case of regional and global dysfunction persevered by pulmonary hypertension, however, the knowledge about interactions of assist systems and the circulation has to be improved in order to optimize clinical assist device performance.     

Vibration Suppression with Resettable Device

Novel low-power or semiactive devices are developed for vibration suppression applications. By manipulating the structural stiffness, the resisting forces generated by the devices are quite large and independent of velocity. Experimental results are presented to demonstrate the feasibility of the devices and to justify the main assumptions used. The critical design issue of device placement is addressed analytically and verified. While much of the development here applies to the case of variable stiffness devices, we focus on resettable devices in which the device behaves like a linear spring. However, at appropriate times, the effective unstretched length of the device is changed—or reset—to extract energy from the vibrating structure.