360 m2烧结机台车跑偏成因分析与调整措施

台车跑偏一直是烧结生产过程中经常发生的问题,严重时影响正常生产,降低设备使用寿命。本文通过分析台车运行过程中的受力情况,建立相关力学模型,研究由于左右侧台车摩擦力不均、台车驱动头轮、左右侧温度差等因素对台车运行轨迹的影响,分析得出台车运行跑偏的“平行四边形”和“梯形”状态,并指出烧结机在制造安装及运行过程中防止跑偏的注意事项。在此基础上,结合某钢厂360 m²烧结机台车跑偏实际情况,通过不同的调整实践,检测运行参数,提出保证台车安装基准与减小两侧热膨胀的台车跑偏控制措施以及合理布置台车配重以平衡台车整体受力的跑偏调整措施,并将其应用于工程实际,空负荷和热负荷条件下烧结机上下台车全部回正,跑偏问题得到解决。     

涟钢180m~2烧结机台车跑偏原因分析及处理

涟钢180m~2烧结机台车运行过程中跑偏严重,在烧结机年检期间,对烧结机平面轨道调整、固定滑道、返回道、头部弯轨、主机台车等进行了更换,对头部星轮非驱动端轴承座上翘问题进行了调整校对,有效地解决了烧结机台车跑偏问题,提高了设备作业率。本文通过实例对涟钢180m~2烧结机台车跑偏的各种原因进行分析,并提出相应的处理方法在年检期间实施,降低了烧结机漏风率,减少了台车备件的非正常消耗,确保了烧结机的正常运行。     

带式烧结机台车起拱现象分析

从台车受力角度出发,研究带式烧结机头、尾部台车起拱现象,分析台车起拱的根本原因;根据烧结机头、尾部台车起拱原因,提出解决台车起拱问题的4种方法,从而达到延长台车使用寿命,减少烧结机生产漏风。     

烧结机跑偏原因分析及处理

烧结机台车运行过程中跑偏,是烧结机设备运行的普遍问题,在烧结机检修期间,对烧结机平面轨道、回车道、头、尾弯道进行了部分更换,对尾部星轮齿板不同步现象进行了调整,有效地解决了烧结机台车跑偏问题,提高了设备作业。本文通过实例对烧结机台车跑偏的各种原因进行分析,并提出相应的处理方法,降低了烧结机漏风率,确保了烧结机的正常运行。     

莱钢400m~2烧结机台车跑偏原因分析及处理

烧结机台车运行过程中跑偏是烧结机设备中存在的普遍问题,通过对烧结机台车跑偏的各种原因进行分析,并提出相应的处理方法,烧结机跑偏得到了有效的改善,降低了烧结机漏风率,确保了烧结机的正常运行。     

烧结机台车起拱现象的分析及处理

对烧结机起拱现象进行了分析.认为烧结机机尾星轮齿板对台车卡轮推动前进过程中产生过大的向上摩擦分力是造成台车在回车道上起拱的根本原因.永通公司通过采取减小星轮齿板对台车卡轮向上摩擦分力等措施,基本消除了回车道上台车起拱现象,降低了烧结机漏风率,延长了台车使用寿命,效果显著.     

带式烧结机台车起拱的力学分析及仿真

针对带式烧结机台车在尾部回程道的起拱问题,对尾部台车的力学关系进行了分析,得出了带式烧结机台车不起拱条件下的力学控制阀值;利用ADAMS软件,建立了450 m2带式烧结机的虚拟样机且进行了动力学仿真,得出了尾部回程道下台车及台车列力值曲线。通过力学阀值进行虚拟控制,达到了无起拱目的,证明了阀值公式的正确性,从力学角度揭示了带式烧结机起拱原因。该研究结果可为今后带式烧结机的工程设计及应用提供理论依据。     

试论烧结机的扩容改造及其经济效益

本文论述和分析了烧结机台车加宽是中小型烧结机设备挖潜的重要途径;台车的合理结构及隔热装置是增加台车使用寿命的主要因素。     

川威烧结机台车起拱现象分析与处理

对川威集团烧结机台车起拱现象进行了分析.认为烧结机机尾曲轨间距过大和安装精度不够引起的台车后轮轴受到的周向切力过大,是造成台车在回程时起拱的根本原因.通过采取减小机尾曲轨内外轨间距和调整安装精度等措施,有效消除了烧结机台车在曲轨处受到的切向力,消除了上下回程受力不均的问题,基本解决了回程轨道上台车起拱现象,保证了台车运...     

带式烧结机台车有限元分析

运用有限单元法对带式烧结机台车进行了温度场和应力场分析,得到了不同温度时台车的应力分布场,指出了烧结机工作时台车受力的关键部位和薄弱环节,并提出了台车设计时应注意的问题和改进方向.     

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)     

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.     

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.