高线精轧机的防水措施

正柳钢高速线材精轧机组为国产仿摩根第5代机型,一般轧制速度达90 m/s,在生产过程中,精轧机组高速重载,环境恶劣,受到温度、压力、摩擦等影响,冷却轧辊、导卫的高压水常会进入精轧机辊箱,冷却水中夹带的氧化铁皮及杂质也跟随进入辊箱后流入油箱,造成油品污染、乳化,油站滤芯堵塞,辊箱轴承磨损加剧、油膜轴承烧损等故障,精轧机组进水是长期困扰的问题。     

河南济钢高线轧机辊箱烧损事故分析及改进

分析了高速线材轧机轧辊箱烧损事故带来的危害和产生的原因,并提出了改进措施.改进后较好地解决了轧辊箱烧损故障的发生,提高了生产率.     

热连轧机组工作辊轴承严重烧损的故障诊断研究

针对本钢1700 mm热连轧机组工作辊轴承频繁烧损,困扰生产多年的的恶性故障;提出了以轴承运行状态在线监测及相关因素核查的研究方法,查明了因辊对交叉轧制而产生的过大轴向力及偏载力矩,是造成工作辊轴承严重烧损的主要原因.通过积极治理,烧损率下降了80%,取得了良好的成效.     

拉矫机工作辊异常磨损和轴头烧损的对策

为了解决拉矫机工作辊服役周期短的问题,在研究拉矫机工作原理的基础上,对工作辊啮合量的合理使用范围进行了深入探讨,针对生产中出现的工作辊异常磨损现象,通过表面纳米涂层处理,延长了工作辊的使用寿命;针对工作辊轴头烧损现象,通过分析工作辊端部的受力变化,结合分析量化了拉矫机支撑辊和工作辊之间的间隙,最终解决了轴头的烧损难题。     

冷连轧机工作辊轴承烧损原因分析及对策

根据工作辊轴承受力情况，分析了冷思厂五机架工作辊轴承烧损的原因，为减少烧损采取的措施及所获得的效果。     

SCR铜杆轧机辊箱故障及对策

通过对SCR铜杆轧机的实践摸索,成功地解决了SCR铜杆轧机辊箱维护的问题。并结合对SCR轧机辊箱的维护与实践体会,从轧机辊箱的结构特点着手,对辊箱的维护要点及常见故障进行了分析,提出了解决措施。通过预防性维修,显著减少了轧机辊箱故障,极大地提高了SCR生产线的运行效率。     

电火花沉积/堆焊技术在支承辊辊颈修复中的应用

液体摩擦轴承在使用过程中,因多种因素造成润滑不充分,引起支承辊辊颈与轴颈套筒产生干摩擦,致使支承辊辊颈烧损,形成多处碳黑区。安钢第二轧钢厂采用电火花沉积/堆焊技术,成功修复了严重烧损的辊颈,节约了生产成本,缓解了支承辊紧张的局面。     

精轧机辊箱装配精度对成品质量的影响

通过对BGV辊箱在轧钢过程中辊缝的变化,从轴向及径向两方面对辊箱备件失效的分析,提出了改进、优化的方法,达到提高辊箱装配精度的要求,从设备装配角度保证了C级精度线材的生产.     

冷连轧机工作辊轴承烧损原因分析及对策

着重分析了冷轧厂五机架工作辊轴承烧损的原因及采取的措施。结果表明，措施得力，效果明显，轴承烧损量比１９９４年下降了８３％。     

攀钢热轧板厂十七辊矫直机改进分析

通过对攀钢热轧板厂十七辊矫直机存在问题的分析,结合现场实际,提出了对矫直机的压下连接机构、支撑辊结构形式进行改进和万向接轴进行改型的建议,解决了压下连接装置频繁松动及支撑辊频繁烧损、寿命低等制约生产的难题.     

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。     

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.     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.