白云铁矿自翻车倾翻系统故障原因及采取措施

根据KF-60自翻车冬季作业时经常出现倾翻风缸起翻慢和回位困难问题,针对性地从自翻车倾翻系统结构和倾翻工作原理入手,对自翻车倾翻风缸起翻慢和回位困难原因进行了详尽分析,并提出了提高自翻车倾翻系统效率的有效措施。     

铁水罐倾翻机构的研究与分析

以150 t铁水罐的倾翻机构为例,对铁水罐倾翻机构的原理和特点做了简要介绍。利用inventor软件对倾翻机构的铁水、耐火材料、铁水罐体、翻转架和固定支座分别进行三维模型建立,论述了倾翻力矩的原理和理论计算方法。然后对倾翻机构在倾翻到某一角度时的三维模型进行分析和计算,得出铁水罐和翻转架的重心位置、重力臂、推力臂和倾翻力矩等性能参数,最后利用对倾翻机构进行有限元分析,对倾翻机构进行优化设计。     

谈11m^3渣罐车电动倾翻装置的改造

11m~3电动倾翻渣罐车是冶金运输的主要车辆之一,也是我厂的主要产品之一。通过几年的生产实践,发现11m~3渣罐车电动倾翻装置设计结构不太合理,因此传动装置系统加工和装配困难,试车时有时出现异常噪音,甚至有卡死现象,产品质量一直不稳定,给制造和使用都带来很多麻烦。 1.原因分析 11m~3渣罐车传动系统如图1所示,主要是通过丝杠传动带动滑架体在两根光杠上滑动,进而通过滑架体拖动支框(渣罐)实现倾翻运动。这种传动方式存在以下问题:     

铝包清理机倾翻工作台结构的优化设计

本文提出了一种铝包清理机构的改进装置—倾翻式工作台结构.对改进后机构的不同工位及特点,进行了工作台的受力分析.通过推导,得出了工作台翻转力与工作台结构转角之间的对应关系.以此为依据,对工作台设计及倾翻功能的实现提出了合理的要求和建议,从而使该结构的铝包清理机更加完善.     

130t铁水罐倾翻特性的研究

以某公司改型的铁水罐为基础,利用ANSYS对其倾翻特性各个参数进行计算和模拟,得出了倾翻过程中质心、转动惯量、倾翻力矩的变化情况以及铁水罐的出水角度等数据,为进一步进行有限元分析提供了帮助.     

铁水倾翻车倾动力矩的研究

为了保证铁水倾翻车在脱硫、扒渣工位时倾翻的可靠性,以某钢铁企业130 t铁水包倾翻车为研究对象,采用SolidWorks软件和公式计算法对倾翻过程中倾翻架及其罐体的倾翻特性进行研究.通过计算得到了随倾翻架角度α变化的倾动力矩M(α)曲线和液压缸推力F(α)曲线,计算结果精确,为液压缸的选型和强度设计提供了理论数据.     

倾翻风缸焊补工艺的研究

该文介绍了采用CO2＋O2混合气体保护焊对倾翻风缸进行补焊的工艺过程。通过对灰口铸铁部件的实际补焊操作,总结出合理的焊接工艺。     

150t钢水罐倾翻装置优化方案设计及实施

在实施新上150 t钢水罐倾翻装置过程中,现场调试发现该设备倾翻力矩远大于原设计电机额定驱动力矩。通过对倾翻装置设计的倾翻力矩进行了校核,分析倾翻装置的结构特点,采用了调整钢水罐在倾翻框架的定位高度,来平衡减小回转载荷力矩的方案。抬高方案实施过程中,通过精确定位和加强焊接质量控制保证了改造施工的质量。从优化后倾翻装置倾翻力矩调试结果数据来看,该优化设计方案实现了倾翻装置的稳定、安全生产要求。     

脱硫倾翻车的设计

本文介绍了脱硫倾翻车专用设备的功能、作用、使用场所等,重点探讨了铁水倾翻车的设计和铁水倾翻车中运行机构、重心设置、车架结构等强度计算方法。设计研制的倾翻车最大载重能力为125t,现场应用效果良好。     

三维软件SolidWorks在铁包倾翻力矩计算中的应用

铁包倾翻力矩计算在炼钢工艺流程设计中有重要的意义和作用,对倾翻过程中的力矩进行核算,有利于了解副钩的工作过程.通过利用Solidworks三维软件对某工程100 t铁包进行三维建模,用其质量特性查询功能可得出铁水包的重量及重心位置等物理参数,以提供力矩计算所需数据.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.