WJD-0.75电动铲运机电缆托辊支架改进

针对WJD-0.75电动铲运机电缆托辊更换工序繁琐及托辊支架固定不合理的问题,对电缆托辊支架的结构进行分析,找出了不便于托辊更换的原因,并提出了电缆托辊支架改进措施。通过现场使用表明托辊支架改造效果良好,提高了托辊更换效率,减轻了维修劳动强度。     

矿用带式运输机托辊结构优化研究

带式输送机托辊具有密封结构复杂、滚动阻力大、运行过程中功耗大等缺陷,因此需要不断对其进行优化,以提高工作效率。通过创新托辊的结构,将输送机托辊与外部环境进行分离,也在一定程度上将托辊内轴承的密封结构进行了简化,从而有效降低了托辊的运行阻力,为带式输送机关键技术的应用提供了参考。本文首先分析了带式输送机托辊的种类和结构,阐述了托辊材质和类型,以及托辊的结构,特别是密封结构和轴承。然后介绍了带式输送机托辊的影响因素和不足之处,最后总结了带式输送机托辊在应用中的优化措施。     

首钢矿业机械厂成功开发全自动调偏托辊

首钢矿业机械厂皮带机分厂，拥有链辊、缓冲托辊、梳形托辊、螺旋托辊、摩擦调偏托辊、注油托辊等6大系列62个品种的托辊生产能力。由于绝大部分托辊产品没有皮带跑偏的调整功能，仅有调整皮带跑偏功能的“摩擦调偏托辊”，在实际运行中的调偏性能又很差，因此出现了市场逐年萎缩的趋势。     

改善托辊结构增加托辊使用寿命的探讨

简要介绍了国产胶带输送机及其托辊的基本情况,以及与国外几种托辊的比较和差异,分析影响托辊质量的主要原因,提出改善托辊结构设计的几点设想。     

胶带机槽型前倾托辊的工作原理分析及前倾阻力计算

阐述了胶带机槽型托辊的工作原理,通过对槽型托辊的受力分析,解释了该类托辊的应用场合,为胶带机使用维护提供理论指导,并对前倾侧托辊阻力计算公式进行推导,为实际运行中前倾托辊能对胶带运输机起到纠偏作用提供了理论依据。     

带式输送机托辊使用寿命延长方法研究

以西沟矿2条13km带式输送机自2015年以来托辊损坏原因和使用寿命为例,说明了环境对托辊使用寿命的多个影响因素,并逐一进行了分析,以及使用不同质量托辊的性价比分析,根据分析结果给出了减少托辊磨损延长托辊使用寿命的解决措施,并得到了现场验证。     

双向密封托辊的研制与生产

详述本钢南芬选矿厂所用各种皮带运输机托辊由50年代的老产品改为新型托辊——双向密封托辊，提高了托辊的使用寿命，满足了生产上的需要。     

对托辊使用寿命与带式输送机节能降耗的探讨

密封性能差的托辊,轴承很容易被污染使托辊出现"早期失效"。托辊与胶带之间就会由理想的滚动摩擦转变为非正常的半滚动半滑动摩擦,随着托辊污染程度的增加,滚动逐渐变差,直至卡死彻底失效。为了保证上述工况下带式输送机的正常运行,除了计     

组合式多油室密封塑料槽形托辊简介

皮带运输机是现代工矿企业中的重要运输设备,托辊是皮带运输机上的基础部件,用量非常大,据统计全国一年要消耗托辊500万个,耗资3亿多元目前国内外普遍采用的都是钢质管式托辊,这种托辊笨重,运行阻力大、易磨损胶带,安装维护也困     

混合机托辊锥套防松装置研究改造

针对混合机托辊轴失效形式及原因进行分析,并设计出了新型混合机托辊锥套防松装置,彻底解决了托辊轴承的锁紧螺母和锥套松动的问题。     

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.     

Validation of a model of psychosocial determinants of occupational health of geriatric nurses

The purpose of this study was to verify a model of relationships between psychosocial factors and health for 8066 francophone nurses working in geriatric care in Québec. A random sample of 1990 subjects was drawn and a participation rate of 77.9% and 55% was obtained for the two-time study taken twelve months apart. Based on the theory of Maddi and Kobasa (1984), the model was reproduced for the two-time periods with the aid of structural equations. The analyses showed that three variables exert a direct influence on psychological distress: professional burnout, occupational stressors and hardiness. Also, variables have a direct effect on burnout: listed in order of importance, these are hardiness, occupational stressors, work support, active strategies of coping and employment status. In dealing with the work stressors, the nurses who are hardy make use of active strategies of coping and look for support form their colleagues. The results of the study help to better understand the psychological and social resources that best favor adaptation of working women in highly demanding work environments. The fallout of the study converges towards the quality of life of helping professionals and towards the cost and quality of health and social services.     

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.     

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。     

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".     

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.     

膨润土类型对昆钢铁精矿造球性能的影响

为改善昆钢铁精矿的造球性能,对昆钢球团添加钙基膨润土和钠基膨润土进行了对比试验。结果表明,钠基膨润土能使生球落下强度、抗压强度显著提高;而钙基膨润土在改善球团爆裂温度方面优于钠基膨润土。因此,在造球生产过程中通过选择钠基或钙基膨润土,或通过两种膨润土搭配,可制备出综合性能优良的球团矿。     

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.     

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。