磁力油封在梅钢烧结风机上的应用

针对梅钢烧结机环冷风机齿箱密封结构进行改进，用先进的磁力油封取代传统的骨架密封，彻底解决齿箱出轴处泄露问题。     

关于D1000—21／22鼓风机轴端密封的改造

详细分析了SO2鼓风机轴端密封的结构、密封机理及密封方式，通过优化选型的办法计算了风机轴端的烟气泄漏量，提出了螺旋型复合密封及改进的办法，在风机密封方面是个较大的突破。     

湘钢2~#高炉TRT轴端密封失效问题的研究与实践

以湘钢2#TRT轴端密封功能失效的问题展开研究。运用目前国际上通行的透平机械内部流场研究的数值模拟办法,建立三维迷宫密封与蜂窝密封结构并划分网格,使用商业CFD计算软件FLUENT对迷宫密封和蜂窝密封的内部流场进行数值模拟,深入分析工作介质在蜂窝密封中的流动本质。通过数值模拟并结合改造工程实践,从理论和实践两方面验证了TRT轴端密封结构改造后的良好效果。     

高炉煤气余压透平(TRT)膨胀机轴端密封的应用与比较

TRT是利用高炉煤气余压余热进行发电的能量回收装置。由于其介质为高炉煤气，属于易燃、易爆、有毒气体，所以要求透平膨胀机的轴端密封系统必须安全可靠，且运行经济。介绍了TRT装置使用过的几种密封形式的结构，工作原理和使用效果，并介绍密封技术的发展为主机带来的经济效益。     

烧结机头尾端部密封技术改进与应用

针对烧结机头尾端部漏风严重的问题,分析了传统带灰箱的分块式刚性密封装置的漏风原因与改进途径,并基于差压吸附密封的原理,提出采用负压吸附式端部密封技术来降低烧结机的漏风率。在此基础上,将负压吸附式端部密封结构中的重锤配重改成弹簧结构,降低了投资与运行维护成本;将吸附式密封改成机械与吸附式双重密封,进一步提高了密封效果,降低了漏风量。     

蝶阀轴端密封的研究

介绍了蝶阀类产品双组多层次轴端密封的结构及密封原理,以及应用该结构的注意事项.该结构在蝶阀设计中得到了广泛应用,并获得了国家实用新型专利(专利号:ZL 201120003939.5).     

微量V和Ti对16Mn钢组织与性能的影响

分析了我国现有变压器箱沿密封结构存在的问题，介绍了一种变压器梯形断面箱沿密封条结构的性能、特点及实际使用效果。     

平炉余热锅炉引风机轴密封的改进

大冶钢厂动力分厂有3台设计蒸发量为6t/h、过热蒸汽压力为1.3MPa的平炉余热锅炉,配置3台Y4—73—11,№ 16D型转速为1480r/min的稀油润滑引风机。该引风机于1991年投产后,先后发生轴承箱轴端油封严重漏油现象,据统计,平均每台引风机每班需补充40#润滑油5kg左右、但由于引风机转速高,负荷大,不能用干式润滑脂润滑,因此,我们只能对引风机的轴密封进行改进。 由于原密封装置由一道羊毛毡密封组成,其极限线速度为5m/s。而引风机轴密封处的轴颈为φ115mm,其轴颈外圆线速度达8.91m/s,超过了羊毛毡密封使用的极限线速度。通过对原结构的分析,我们…     

隔膜泵进料阀箱盖网格划分技巧及强度分析

在料浆输送设备隔膜泵的结构中有多处重要的螺栓联接,液力端进料阀箱新结构的应用,需要对进料阀箱盖进行打压来实现联接螺栓的预紧及阀箱盖的密封。因此对承受高压的进料阀箱盖进行强度分析,并利用Hypermesh软件进行了阀箱盖有限元模型的前处理,得到了较好的网格质量及分析数据。     

一种套管螺纹接头

一种套管螺纹接头，主要解决主密封采用圆锥曲面密封面或其与圆锥曲面密封面相配合在受到轴向拉力时接触压力降低，影响密封性能。本实用新型包括外螺纹件、内螺纹件；外螺纹件端部金属主密封部位有一个圆弧密封面、柱面密封面与内螺纹件端部的圆弧密封面、柱面密封面表面过盈配合形成主密封面结构，外螺纹件端部的扭矩台肩面与内螺纹件端部的扭矩台肩面配合形成辅助密封面结构。     

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.