油气润滑技术在安钢1550 mm冷轧机组工作辊轴承应用实践

介绍了油气润滑技术在安钢1550 mm冷轧机组轧机工作辊轴承上的应用情况。通过实际应用表明,采用油气润滑在生产中工作辊轴承降低了能耗,提高了设备的利用率,加强了集中润滑效果,减少了系统维护费用。     

1550mm单机架四辊平整机辊系改造

介绍对冷轧平整机组辊系的支承辊油气润滑、支承辊换辊用拉钩、换辊拉杆、轴承座端盖等实施的改造,减轻了支承辊装配操作的难度,还避免了支承辊在使用过程润滑油泄漏以及平整液渗入支承辊轴承内破坏轴承润滑条件。     

油气润滑在板坯连铸机上的应用

介绍了油气润滑在新钢公司第三炼钢厂板坯连铸机中的实际应用,通过把原干油润滑改为油气润滑新方式,解决了轴承润滑问题,轴承和弧形导辊寿命得到提高,板坯质量也有较大的改观。     

油气润滑在冷轧机组轧辊润滑系统中的应用

针对在生产过程中冷轧机组的轧辊轴承漏油问题,将稀油润滑系统改造为油气润滑系统。将油气润滑系统应用到冷轧五机架六辊轧机工作辊和中间辊止推轴承、支撑辊的径向和止推轴承中。改造后冷轧机组运行稳定,安全可靠,解决了轧辊轴承漏油的问题,提高了轧制液在线使用质量和带钢表面质量,节省了大量润滑油、取得了较好的经济效益。     

本钢冷轧厂轧机工作辊轴承润滑现状及研究

对本钢冷轧厂轧机工作辊轴承润滑前存在的问题进行了分析并针对这些问题采取解措施进行了改造研究，最终采用工作辊轴承的油气润滑方式具有低能耗、易控制、润滑集中、润滑效果好、系统维护方便和安全性能高等特点。     

油气润滑技术在宝钢冷轧机上的应用

探讨了油气润滑技术的工作机理、组成和优点.阐述了REBS油气润滑系统在宝钢冷轧机上工作辊、支撑辊轴承润滑中的应用,提出了轴承润滑需油量、润滑间隔等参数的计算方法.     

油气润滑技术在冷连轧机上的应用

油气润滑轴承与传统的脂润滑轴承相比,在改善轴承的使用条件、提高转速、增强降温效果、节油节能和减少环境污染等方面,都显示了很大的优越性。尤其是油气润滑技术在冷连轧机上的应用结果表明,该技术是轧辊辊颈轴承润滑的发展方向,应进一步推广应用。     

S6轧机工作辊端面接触行为研究

S6轧机为国内外较为先进的一种改进型Z-Hi轧机机型。因辊径小,工作辊轴颈无轴承套结构,所以在工作辊轴两端面各增加了轴向止推机构负责工作辊的轴向定位。以S6轧机轴向止推轴承为研究对象,对工作辊在不同工况下的轴向止推轴承转速进行了分析,揭示了工作辊不同工况对S6轧机工作辊端面接触行为的影响。研究表明,工作辊挠曲、垂直平移以及水平平移,都会改变轴向止推轴承的转速以及转速波动规律,并且导致轴向止推轴承和工作辊轴端的磨损加剧。     

铜板带四辊液压轧机轧辊轴承的润滑

本文介绍了铜板带四辊液压轧机轧辊轴承的润滑方法,重点介绍了轧辊轴承的油气润滑方法。对轧辊轴承采用油气润滑方法涉及的润滑、密封、配管问题,提出了解决思路,希望对相关单位的设计或改造提供参考。     

油气润滑在强力矫直机上的应用

介绍了油气润滑在济钢强力矫直机支承辊轴承的使用原理、使用特点和使用中应注意的问题。     

高速铁路用钢轨生产技术

采用铌稀土(BNbRE)钢种,进行了钢的高纯净度、无缺陷连铸坯、高精度轧制、在线检验及相关技术研究,形成高级别钢轨生产工艺.结果表明:生产的钢轨能够满足<时速200公里客运专线60 kg/m钢轨暂行技术条件>的技术指标.     

关于高职教育终身化理念的思考

为了发挥高职院校在终身教育、终身学习、学习化社会的建设中的积极作用.对终身教育及高职教育终身化的理念进行了论述,提出了高职教育终身化的原则和构建终身教育及终身学习的体系.     

Guidelines for clinical use of drugs for involutional osteoporosis

Guidelines for clinical use of drugs for involutional osteoporosis will be released soon in Japan. Seven different types of drugs for osteoporosis are in market for clinical use in Japan. Those includes calcium, estrogens, anabolic steroids, calcitonins, active vitamin D3, ipriflavon, and etidronate. The guidelines recommend to clarify the risk factors in each patient before to start administration of drug. Patients with osteopenia are basically recommended to be followed without any drug treatment, but, patients with osteoporosis are generally recommended to be treated with drug after evaluation of risk factors. After menopause, inhibitors of bone resorption would be recommended as a first choice drug. For monitoring effects of treatment, bone mass measurement is so far the first choice, but bone metabolic markers would be used as well.     

Criteria for selection of patients for emergency portacaval shunt

A computer program analysis of the effect on survival of 74 preoperative factors was performed as part of a prosepctive study of the emergency portacaval shunt in 146 unselected patients with bleeding esophageal varices due to alcoholic cirrhosis. Only ascites, a serum glutamic oxalacetic transaminase level of 100 units or more, and a requirement for 5,000 ml or more of blood transfusion were associated with a statistically significant decrease in survival. However, none of these factors are contraindications to operation because their presence permits a survival rate of 37 to 40%. The only contraindication to emergency portacaval shunt is the combined presence of ascites, jaundice, encephalopathy, and severe muscle wasting, a constellation that was incompatible with survival beyond one year.     

The use of dimethylsulfoxide for fixation of yeasts for electron microscopy

Increasing numbers of young women with ovarian failure and women of advanced reproductive age (> 40 yrs) utilize oocyte donation to treat their infertility. In both groups, women who become pregnant frequently experience multiple gestation, occurring in up to 30% of pregnancies. Advanced maternal age and high-order multiple gestations are associated with an increased risk for obstetric complications. We reviewed the pregnancies of patients with high-order multiple gestations (> or = 3 gestational sacs) with respect to their antepartum course and neonatal outcomes. Mothers were divided into two groups according to age at conception; Group I (> or = 40 yr, n = 20) and Group II (< 40 yr, n = 10). These 30 high-order multiple gestations were found among 127 successful oocyte donation cycles (23.6% of all pregnant patients). Data regarding pregnancy outcomes were gained by chart review and telephone interview. Results demonstrated spontaneous reductions in the number of implantation sites were similar between groups (Group I: 21.4% vs. Group II: 17.6%). Multifetal pregnancy reduction (MFPR) was more often chosen by older women (Group I: 45% vs. Group II: 10%; P < 0.05). Antenatal complications were commonly experienced by both groups (> 80%) as were operative deliveries (> 85%). However, neonatal outcomes were generally good, with only one death occurring in the 79 delivered infants (1.3%). We conclude transferring supernumerary embryos to women undergoing ovum donation places patients at great risk for high-order multiple gestations. These pregnancies are associated with increased antenatal and neonatal complications. Although advanced maternal age is normally an added risk factor, well-screened older patients carrying high-order multiple gestations experienced similar outcomes as younger mothers.     

介绍一种生产冲挤用铝合金坯料的新工艺

哈兹列特铝板带连铸连轧工艺已被成功地用于铝和铝合金冲击挤压用坯料的生产。在对哈氏四个有关用户扫描的基础上，列举了其产品及其用途，并介绍了相关工艺及其优点。     

重轨孔型设计软件的编制

随着计算机在轧钢领域的广泛应用，重轨孔型设计利用计算机技术是今后发展的必然趋势，结合鞍钢大型厂的实际情况，编制了重轨孔型设计软件，应用该软件后，明显地提高了设计工作效率，加快了新产品的开发速度。介绍了该软件的编制方法、系统的功能及程序结构。