涨套式无键联接装置简介

由联邦德国首创后在日本推广应用的涨套式无键联接装置,现已标准化,可以用于刚性联轴节与轴的联接、用于钢轨车轮的联接、用于齿轮与轴的联接、也可用于链条式联轴节。该装置是由两个各带有斜面的内、外锥形涨套4、2,高强度螺栓1和锥环3组成,见图。当拧紧锥环上的高强度螺栓时,螺栓产生轴向力,使内外锥形涨套分别向圆周内、外同时收缩或膨胀,这时产生的径向正压力,形成过盈配合。通过摩擦力作用,使传动组件传递力矩和轴向力。涨套式无键联接的优点: 1.能传递较大扭矩该装置由于不需要在轴和轮毂上开键槽,因而可传递较大扭矩     

油膜轴承锥套过盈配合的有限元分析

采用接触问题有限元法分析了油膜轴承锥套的过盈配合,通过ANSYS10.0进行计算机模拟,计算出了过盈配合中锥套的应力分布,为过盈配合的联结强度分析和优化设计提供了可靠理论依据。     

基于ANSYS的无键联接套热装配预应力分析

利用ANSYS有限元分析软件,对济钢第一小型轧钢厂中轧减速机输出轴无键套联接与轴的配合进行建模,并模拟计算配合应力,得出过盈量与最大预应力的对应关系,为减速机输出轴无键联接套的过盈量设计计算提供了理论依据。     

酸轧机组卡罗塞尔卷取机卷筒圆锥面过盈联接失效分析与对策

针对卡罗塞尔卷取机存在的卷筒轴与空心套联接螺栓频繁断裂问题,通过现场调查和理论分析。认为断裂原因由卷筒轴与空心套联接的圆锥配合面过盈量不足所致。为保证卷筒轴工作扭矩的传递,通过分析保证传递扭矩所需的圆锥配合面最小过盈量,并经圆锥配合面的试装,检测过盈量对轴承游隙的影响,最终确定了既能满足轴承游隙要求,又能有效传递工作扭矩的卷筒轴与空心套圆锥配合面的过盈量数据,在现场实施后,取得了满意效果。     

安钢高线轧机辊环用锥套的应用与维护

介绍了锥套在安钢高线机组的应用情况 ,针对生产使用中出现的锥套损坏现象进行了分析 ,提出了具体维护措施 ,并取得了明显效果     

锥套与锥套件过盈配合的冷装方案

锥套是油膜轴承产品的关键件,为了满足用户不断提升的使用要求,锥套的设计精度及锥套与锥套键的装配设计要求也在不断地提高。机械产品过盈配合的装配方案有三种:压装、热装、冷装。对于锥套与键的装配结构,沈冶公司首次尝试大型高精度产品的冷装方案,因此,在提高装配效率,确保产品装配质量,降低制造成本的同时,也填补了此种大型高精度产品的冷装配制造空白。     

圆柱面过盈联接仿真与验证

工程中常用圆柱面过盈联接来传递载荷,且过盈量的大小决定了传递载荷能力的大小。运用AN-SYS接触分析模块能有效地对该联接形式进行仿真分析,并运用相关理论证实其仿真结果的正确性。该仿真接触分析法同样适用于其它不同类型的过盈面联接型式。     

冷轧管机主减速机传动齿轮的过盈联接计算

冷轧管机主减速机具有降速增扭的作用,为节省制造成本,主减速机中的大齿轮采用组装齿圈式的结构,通过热胀法把齿圈与轮芯组装在一起,而齿圈与轮芯的过盈联接则非常重要,需经计算确定合理的过盈量。鉴于此,以某大型冷轧管机为例,运用经典力学理论对主减速机传动齿轮的过盈联接进行计算和分析,提供一种切实可行的计算方法。计算结果表明,该配合设计在足够的安全裕度下可保证动力传递且不发生滑移,该研究为冷轧管机主减速机传动齿轮的过盈联接提供了技术支撑。     

端面齿联轴器无键联接配合计算探讨

主要介绍了在冶金机械工程上常见的大过盈量无键联接,分析了其优缺点。并通过端面齿式联轴器的尺寸超差的实例来阐述如何通过大过盈配合的校核计算来进行质量判定。通过该计算校核,能更合适地设定过盈量,把控装配风险和质量,并为大过盈的无键联接厚壁圆筒类零件的生产、装配及检验提供了相应的借鉴资料。     

VC轧辊过盈装配结构参数对静载凸度的影响

VC轧辊由芯轴和辊套装配而成,在辊套和芯轴之间有一油腔,辊套在芯轴两端过盈装配,能承受轧辊扭矩,并同时能将高压油密封在油腔中.液压胀形轧辊本身的结构参数对于该技术能否成功具有举足轻重的地位.使用有限元法模拟了液压胀形轧辊的过盈装配,讨论了辊套壁厚、过盈量大小以及过盈配合长度等结构参数对VC轧辊静载凸度的影响,为VC轧辊的设计提供参考依据.     

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。     

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.     

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.     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.