宽厚板轧机机架辊密封方式的改造实践

针对宽厚板轧机机架辊在使用过程中暴露出来的问题,对机架辊轴承故障的原因进行分析并提出改进措施,通过对辊肩、轴承压盖及密封等的改造,大大改善了机架辊轴承座的密封性能,实施后取得了良好效果。     

马钢镀锌线光整机轧辊轴承座密封装置结构的改进

针对马钢某镀锌线光整机工作辊和支撑辊轴承座密封装置在设备调试和试运行中出现的问题,通过分析原有密封结构造成的故障,不断改进密封结构、轴承座局部结构和更改密封类型,解决了问题,保障了设备的稳定运行,提高了生产线的作业率和成材率,降低了轧辊轴承消耗。     

线材轧机轴承润滑和密封改进

对粗中轧机轴承进行了改进，在轴承座上增开油路，改迷宫式密封为离心式密封，使轴承的润滑、密封条件明显改善，轴承使用寿命由７００小时提高到２０００小时。     

50t转炉轴承座润滑改造

为解决50t转炉的轴承座稀油润滑的漏油问题,将轴承座的润滑形式由稀油润滑改为干油润滑,并修改轴承座的密封形式。即解决了漏油问题,又改善了轴承的润滑。大量节省了人力、物力、财力,取得了良好效果。     

离心风机轴承座密封的改进

改变离心风机轴承座密封形式，介绍了磁力机械密封的安装步骤。     

汽车发动机润滑油的监测与更换

针对传统的定期强制换油存在的弊端 ,提出了通过对在用机油粘度、水分、闪点、中和值等指标进行监测来确定是否更换机油的方法。试验表明 ,实行按质换油 ,可保证汽车技术状况良好 ,并使机油消耗下降 8.9%～ 5 1.0 %。     

巧用间隙配合处理风机轴承座漏油

针对生产现场经常出现的风机轴承座漏油的现象，在认真分析其发生机理的基础上，找出产生漏油现象的主要部位，结合多年的工作经验，采用调整旋转部件之间微量间隙的方式，消除了轴承座漏油现象，使其密封可靠，达到了设备长周期稳定运行的目的。     

高线吐丝机改造

通过吐丝机801405轴承润滑方式的改进和轴承座配合公差的优化，大大延长了该轴承的寿命。     

转炉半干法除尘粗颗粒分离回收工装改进实践

介绍了福建三钢炼钢厂转炉半干法除尘污泥粗颗粒分离机尾端轴承座组的改进过程.将尾端轴承座组中对称分布的双列圆锥滚子31316轴承,改为关节轴承GE120ES单列1对;将简单的静态密封、通盖压紧填料,改为静态+动态组合密封,既有填料压环套,又在轴承短轴前段增加T形外螺纹,组合成螺旋幅,依靠螺旋辊转动,主动挡泥.改进后,有效...     

2300kW电动机轴承座漏油原因分析与改进

介绍了唐钢棒线厂2300kW电动机轴承座密封存在的问题、改进措施及使用效果。     

NEHRP Provisions for 1994 for Nonstructural Components

The recently published 1994 National Earthquake Hazards Reduction Program (NEHRP) provisions include new and substantially improved provisions for the seismic design of nonstructural components, including architectural, mechanical, and electrical components. The provisions are a significant departure from the 1991 NEHRP provisions and other seismic provisions, such as those offered by the 1994 Uniform Building Code (UBC). The design-force provisions are rationally derived and consider actual in-structure acceleration data recorded in recent significant California earthquakes. Also considered in the design-force equations are the dynamic properties of the components, the location of the component within the supporting structure, the safety and operational importance of the component, and the component's anchorage ductility and energy-absorption capability. The resulting force requirements of the new recommendations are compared with the 1991 NEHRP provisions and the 1994 UBC requirements. In addition, explicit design displacement provisions are introduced and discussed.     

Guidelines for Warranty Contracting for Highway Construction

This paper presents guidelines for implementing the construction warranty contracting method in the highway construction industry. A logical, step-by-step method for effectively applying the warranty contracting program for use in the highway construction industry is developed. Relevant issues that may present obstacles to the implementation are addressed, while the best practices, compiled from an evaluation of the current industry’s state-of-the-art practices, will assist an interested state highway agency in creating a warranty specification. In performing this research, the current use of warranty specifications among state highway agencies was examined, and an in-depth case study of the Wisconsin Department of Transportation’s warranty program was conducted.