气密封装置在闪蒸机主轴上的应用

介绍了软填料密封在闪蒸机主轴上的使用情况以及密封频繁失效的原因。在大量试验的基础上，将气密封装置应用于闪蒸机主轴，实际生产中效果显著。     

XS-800旋闪干燥机密封装置的改造与应用

介绍旋转闪蒸干燥机喂料螺旋主轴密封的结构,分析泄漏原因,设计了一种由迷宫密封、气体密封和盘根密封所组成的组合式密封,以满足恶劣工况条件,改造后使用效果良好.     

∮1000mm热锯主传动系统改进

为了解决 10 0 0 mm热锯主轴轴承频繁故障问题 ,对轴承失效原因进行分析 ,认为轴承座同心度低、径向迷宫形密封间隙大、油品选择不合理等是造成轴承失效的主要原因。为此 ,将原主轴安装的 4套 3 2 0轴承改为 2套双列向心球面滚子轴承 3 62 0 ,并在原密封的基础上增设毛毡密封 ,重新选择润滑油 ,改善润滑 ,增强密封效果 ,从而降低了轴承故障 ,减少热停工时 2 5 .8h/a,年效益 10 .2 6万元     

倾动减速机主轴密封漏油的原因分析及改进

结合国丰第二炼钢厂2#转炉倾动减速机的实际运行情况,分析了倾动减速机主轴密封部位漏油的主要原因.采用密封回油槽结构对该部位进行局部改进后,月加油量由500 kg降至70 kg,降低了备件消耗和工人的劳动强度,确保了转炉正常的生产秩序,为生产提供了保障.     

链篦机-回转窑窑尾密封改造

链篦机-回转窑氧化球团窑尾密封是链篦机与回转窑连接的关键部位，它的密封效果对整个链篦机，回转窑氧化球团生产至关重要。本文介绍了通过窑尾密封改造，解决了影响链篦机一回转窑生产的诸多问题。     

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。     

轴端氮气密封在煤气加压机上的应用

在D400-13煤气加压机应用轴端氮气密封替代原迷宫式密封，以充分利用叶轮前后压差，消除轴向推力，减少机械磨擦，从而保证密封效果，改善风机性能，提高密封寿命。使用表明，改造后消除了煤气外泄现象，提高了设备开机率，年直接经济效益15．22万元。     

翻引钢机上U型密封的改进

Ｕ型密封的常规使用方法存在不足，胶圈易撕裂、破损、泄漏快寿命短。通过对密封件材料选择及结构形式改进，使Ｕ型密封的密封效果得到很大程度的改善。在翻引钢机应用，寿命提高了３－４倍。     

煤气加压站密封系统改造

针对煤气加压机氮气密封系统运行费用高、氮气压力波动影响密封效果等问题,采取科学安全的技术措施对氮气密封系统进行改造,达到了节约资源、减少消耗、降低成本的目的。     

冷等静压机上端盖排气系统的故障分析与改造

根据冷等静压机上端盖排气系统的结构及工作原理,深入地分析了排气系统在高压工作中频繁发生密封失效的原因。通过在保持原上端盖结构不变的情况下,对一部分零部件进行少量的改造,并按照原装配尺寸设计制作出新型的浮子及密封阀,不但大幅降低了排气系统的故障率,提高设备运转率,方便维修,而且减少废、次产品的产生,实现了排气系统零成本运行。     

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。     

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。     

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.     

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。     

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.