武钢二烧1号主抽风机振动故障的诊断与处理

运用故障诊断技术分析了武钢烧结厂二烧车间1号风机异常振动的原因，从机械结构和土建基础两个方面人手消除了该风机的异常振动。     

一次装配失误引起电动机空载电流增大故障的分析与处理

1前言电动机空载电流异常增大的故障中,多数是由于电气方面的原因引起,也有部分是由于机械方面的原因造成。临汾钢铁有限公司有一台YZ160M1-6/5.5kW电动机在进行电气检修后空载试车时,发现该电动机空载运行时电流异常增大,经过对故障电动机全面检查、分析及检修,现该电动机已投入正常运行一年多。2故障情况2.1技术参数型号:YZ160M1-6;容量:5.5kW;频率:50Hz;额定电压:380V;额定电流:12.5A;空载电流:7.8A。2.2故障现象故障电动机是一台刚进行电气检修后的5.5kW起重用电机,空载试验数据如下:直流电阻:AB:2.239Ω;BC:2.238Ω;CA:2.243Ω…     

一种仿龙门吊安装支架的设计

介绍某熔炼车间内大型设备在场地受限制不能采用现代化起重机械吊装的情况下采用的仿龙门吊安装支架结构设计,该支架构件为就地取材,在特定条件下应用能合理地缩短施工周期,节省投资,可供改扩建工程借鉴。     

三相异步电动机机械振动故障处理方法

结合生产实际,介绍了三相异步电动机发生机械振动故障的主要原因及处理方法,并结合工厂的检修实例,给出了检修和处理过程,为实际生产中三相异步电动机振动故障的诊断提供一定的参考,从而保证设备的正常运行,避免大的经济损失。     

Mechanical circulatory support in heart failure]

Heart transplantation is an established therapy for end-stage cardiac disease. The number of organ donors is limited, and the mortality on the waiting list is increasing. To give these patients a chance to survive their waiting time, chronic mechanical circulatory support, especially left ventricular assist devices have been clinically established. The results with this therapy are encouraging. Because of these results trials using these devices as an alternative for cardiac transplantation are initiated. Due to the further development and miniaturization of such devices this indication will become more important. The most interesting patients are the one, in which devices could be explanted after chronic support, because their myocard has recovered. If we can find a way to identify such patients a new form of therapy for end-stage heart disease could be established.     

Treatment of heart failure

Heart failure is a disease which involves not only the heart but the entire circulatory system. Progression is directly related to interactions between myocardial disorders and neurohormonal and circulatory phenomena. Advances in treatment have resulted more from the development of vasodilator drugs with neurohormonal effects than from drugs with a direct effect on the myocardium. Diuretics are essential due to their rapid functional effect and the reduction in pressure on the ventricle wall. The effectiveness of digitalics is recognized not only in patients with atrial fibrillation, but also in those in sinus rhythm with ischemic heart disease. Conversion enzyme inhibitors are useful in all stages of heart failure, improving both quality of life and life expectancy as well as limiting myocardial and vascular remodeling and retarding progression of ventricular dysfunction. As current progress in the treatment of heart failure has not greatly reduced mortality, prevention is the major challenge facing all physicians. Treatment of asymptomatic ventricular function is one rational approach.     

加热炉梁上垫块结瘤引起重轨轧疤的防治

针对重轨生产中经常存在下头侧轧疤表面缺陷,经分析认为:属加热炉梁上垫块结瘤,加热炉内高温下钢坯压在瘤子上出现凹坑,经后工序多道次轧制形成轧疤表面缺陷.因停炉清除瘤子不能得到长久根除,采取了适时调整加热炉内钢坯位置,避免钢坯长期压在同一位置,使缺陷得到了有效防治.     

干熄炉水封槽焊缝开裂的在线处理

介绍了干熄炉水封槽开裂漏水的在线处理,分析了造成水封槽开裂的原因并提出了改进措施。     

机械设备无垫板安装的时效研究

以１１５０初轧机为试验模拟对象，对无垫板安装二次灌浆层的变形进行了较长时期的分期测试和研究，试验测试结果证明了无垫板安装二次灌浆层具有足够的长期承载和抵抗变形的能力。研究还表明二次灌浆层随时间呈幂函数变化规律，文中给出的其定量表达式可用于设备标高值变化的估计和预报。