粉末联轴器在煤气加压机上的应用

粉末联轴器是一种节能型联轴器，并可实现异步电动机软起动。本文介绍了粉末联轴器的构造和工作原理，并针对原联轴器试车过程中出现的问题，在分析联轴器运行状态的基础上，具体制订出合理的介质配方和安装调试方案，从而使联轴器顺利起动，一次试车成功，并投入了正常使用。     

新型滚珠联轴器的应用与研究

涟钢二轧钢厂自１９９４年起在Φ２５０ｍｍ轧机机列上开始试用滚珠联轴器,并根据替代齿轮联轴器、十字万向联轴器中所存在的不足进行了改进,使之转运平稳、传递的扭矩大、使用寿命提高。使用这种联轴器１年所节约的联轴器制造费,以及提高轧材产质量所创的经济效益达１５０万元。     

鼓形齿联轴器及其国产化

鼓形齿联轴器及其国产化易荣祥（江西贵溪冶炼厂）在机械传动中，联轴器作为传递运动和动力的一种装置是必不可少的。我们厂引进日本国的成套设备中，同时带来了一些辅助装置，其中就有鼓形齿联轴器，这种联轴器是一种新型的挠性联轴器。１鼓形齿联轴器的结构及特点鼓形齿...     

重型桥式起重机卷简联轴器失效原因分析

通过对脱硫吊车卷筒联轴器失效的原因进行剖析，加深了对重型桥式起重机卷筒联轴器的认识，为使用、堆护、检修卷筒联轴器起到了一定的指导作用，同时，也指出了卷筒联轴器在设计、制造中应注意的问题。     

POMINI公司轧机用鼓形齿联轴器特点分析

对轧机接轴上常用的两种万向联轴器——十字轴式和鼓形齿式联轴器的结构和特点进行了比较 ,对 POMINI公司制造的鼓形齿式万向联轴器在设计和制造上的特点进行了分析。     

"有滚动止推轴承的联轴器"SSWZ重型、SSWCZ超重型系列万向联轴器

阐述了目前国内外重型万向联轴器的发展及现状 ,介绍了专利 SSWZ重型、SSWCZ超重型系列万向联轴器的性能特点及其达到目前国际十字轴式万向联轴器的领先水平 ,2 0 0 0年获世界发明家国际协会国际发明金奖。     

转炉倾动装置的改进设计

对传统型全悬挂转炉倾动装置进行了改进设计,联轴器采用了径向弹性柱销联轴器,承载能力高,制动器与电机分装于一次减速机的前后两侧,联轴器和制动器拆装方便,有利于提高了转炉设备的运行可靠性,检修维护也更加方便。     

一种钢球式安全联轴器安全单元的设计与调整

为了解决矫正机用钢球式安全联轴器设计与调整问题,对钢球式安全联轴器的核心部件——安全单元进行力学分析与设计计算,得到了安全单元的普遍设计公式。设计公式为安全联轴器的设计提供了理论支持。通过对制造安全联轴器的现场使用、调整,验证了设计的正确性。     

3500轧机辊端联轴器改造及结构与强度分析

首先讨论了滑块式万向联轴器与十字轴式万向联轴器的优缺点,然后重点阐述采用三维CAD、装配体有限元分析方法对改造后的3500轧机辊端十字轴式万向联轴器进行结构和强度方面分析。     

大型联轴器裂纹原因分析及对策

通过对切向键连接的大型联轴器的受力分析、强度计算及材质分析，找出了联轴器裂纹产生的原因，对大型联轴器的选材、制造和使用均具有重要的意义。     

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.