水泥磨轴瓦测温点的改进

水泥磨轴瓦测温点的改进房尉民，来敏浙江省余杭市杭州钱潮建材股份有限公司（３１１１２２）我厂的Φ２．２ｍ×６．５ｍ水泥磨原机械式温度指示仪测温点在轴瓦座下的油池中，通过测试油温来了解轴瓦温度，存在着介质损耗和滞后，测出来的温度与实际轴瓦温度不成线性，代...     

钢－铜－巴氏合金轴承作用简介

通过对轴承合金的温度特性以及如何避免轴瓦局部高温热点现象的发生，提高轴瓦的温度承受能力等问题的探讨，说明三层合金轴瓦在高速重载情况下独特的优越性能。     

磨机主轴瓦温度报警和保护控制回路的改进

磨机主轴瓦是磨机的一个重要零件。当由于一些机械故障和其他原因造成主轴瓦温度过高时，极易烧坏主轴瓦上轴承合金材料，造成主轴瓦的损坏，影响磨机的正常运行和生产。为此，需要对主轴瓦进行温度监测，保护主轴瓦不被烧坏。     

抑制裂解气压缩机汽轮机止推轴瓦温度上升的优化措施

汽轮机(DST-201)止推轴温TE-12811A/B持续上涨,已达报警值120℃。轴温偏高,加速润滑油的氧化并在轴瓦表面形成热漆膜。为有效预防漆膜的形成并去除系统中的软性污染物,向润滑油加注溶解度增强油。加注增强油后,止推轴瓦温度TE-12811A/B比加注前下降了5℃。通过采取更换止推轴轴瓦,将轴瓦材质升级为铜铬合金,提高了轴瓦承载能力,增加轴瓦的导热效率,降低了轴瓦温度,从根本上解决轴瓦温度波动、偏高问题。     

自制磨机轴瓦温升监测报警器

为解决磨机的巴氏合金瓦容易烧坏问题，我们自制了一套磨机轴瓦温升监测报警器。它能同时监测六个轴瓦的温度，并用发光二极管分5区段（45、55、65、75。85℃）显示出来。使用多年来，效果很好。回构造磨机轴瓦温升监测报警器由测温头、温度显示板、测温电路、报警电路。稳压电     

二氧化碳压缩机轴瓦国产化改造研究

分析尿素装置二氧化碳压缩机轴瓦温度高、机组运行周期短的原因,提出机组轴瓦技术开发工艺路径并试验成功。二氧化碳压缩机轴瓦国产化成功解决了轴瓦温度高、机组运行周期短、进口备件采购周期长的问题,降低了备件消耗费用,打破了国外对该项技术的长期垄断。     

球磨机中空轴瓦的发热原因与处理方法

球磨机中空轴瓦的发热原因与处理方法陈国源甘肃省刘家峡黄河水泥厂（７３１６０２）无论新旧球磨机，一旦出现中空轴瓦温度突然升高，甚至发烫厉害、冒烟等现象时，不可紧急停车，因为这时轴瓦的油膜已被破坏，轴颈和轴瓦直接接触，很容易发生撕脱粘附现象，易造成重大设...     

环己醇装置氢气压缩机轴瓦温度超高原因分析及对策

分析了环己醇装置氢气压缩机的轴瓦温度超高的原因,采取了有效的技改措施,避免了轴瓦温度超高,保障了氢气压缩机安全稳定运行。     

球磨机主轴瓦发热原因及处理

我厂新建水泥磨采用Φ4.2×13m的中空轴球磨机,生产能力为150t/h。在安装后试生产时,磨机主滑履轴瓦温度很快上升到70℃,磨机保护跳停。1故障分析造成磨机轴瓦温度高的主要原因：（1）出磨水泥温度过高,影响到轴瓦温度。（2）轴瓦温度检测报警回路故障。     

汽轮机组轴瓦温度高的分析及处理

分析某汽轮机300MW机组普遍存在的2号轴瓦温度高原因,阐述了影响可倾瓦温度的关键因素,并通过合理选择轴承的油隙、调整轴瓦的负荷分配、修刮可倾瓦的进出油楔、扩大进油节流孔等手段,使改型机组2号轴瓦温度明显降低。     

复合蓄热热泵热水空调技术

根据能量梯级利用原理,提出一种将水蓄热与相变材料蓄热结合在一起的复合蓄热热回收空调系统,即在空调机组冷凝器上串联一个相变蓄热器和一个水蓄热器,从压缩机出来的高温高压制冷剂过热蒸汽首先经过相变蓄热器,使品位较高的过热以潜热的形式储存于相变材料中。再经过水蓄热器,将部分温度较低的相变热储存于水中。实验表明,该系统能有效地回收19.6%的冷凝热,其中在空调关闭后通入较小流量的冷水即可制取温度在40℃以上的生活热水;在空调运行的条件下,通入较大流量的冷水可连续制取温度在40℃以上的生活热水。该系统达到了节约能源、满足生活热水需求一举两得的目的。     

Superheating effects on the melting of ultra-high modulus linear polyethylene

New results are reported on the superheating behaviour of ultra high modulus polyethylenes which have been restrained from shrinkage during the melting programme. Very high dagrees of superheating were observed, which were somewhat dependent on the polymer molecular weight. It is considered that the ultra high modulus polyethylenes do not contain extended chain crystalline material, and that the superheating effects are associated with the presence of a molecular network which can be prevented from relaxing by mechanical restraint.     

熔盐加热炉的结构设计和熔盐过热的研究

介绍了热载体熔盐的组成和性能,分析了熔盐加热炉的结构和燃烧,并对炉管内熔盐过热的原因进行了研究,探讨了炉体结构设计的准则和防止熔盐过热的方法,最后给出了因熔盐过热造成炉管损坏的修复方法.     

特低压气藏解盐工艺的研究与应用

面临着天然气无后备储量接替,老井产能递减快的现状,我们积极转变观念,将工作重心转移到老井维护上来,通过气井抑盐、解盐,保证气量的稳产。在摸清每口井的生产情况,利用多种工艺技术实现增产,一是推广应用成熟的采抑盐工艺技术,二是大胆实践,根据不同情况采取不同的采气工艺技术,如加注抑盐剂或清水进行抑盐、解盐,利用撬装式气举车组进行气举排出井筒内的抑盐剂或清水,连续掺水洗盐+压缩机连续气举复合解盐采气工艺,确保气井保持良好的工作状态。     

一段炉过热蒸汽低温盘管损坏情况分析

介绍过热蒸汽管线工艺改进方法及一段转化炉对流段过热蒸汽低温盘管损坏经过和原因,提出设备修复方法。     

ANALYTICAL SOLUTIONS FOR PEELING USING BEAM-ON-FOUNDATION MODEL AND COHESIVE ZONE

When fibrillation occurs during peeling, the normal stress in the adhesive may gradually reduce to zero at the peel front. The shear stress also reduces to zero. Classical beam-spring (or beam-on-elastic-foundation) models do not yield solutions that have these properties. With the use of a beam-on-foundation model combined with a cohesive zone in the neighborhood of the peel front, these properties can be satisfied. In order to obtain analytical solutions, peel tests are considered in which the backing has a small slope and is linearly elastic in the adhered region, and the traction law is assumed to be piecewise linear. Cases are considered with only normal stresses in the adhesive (mode I), only shear stresses (mode II), and both stresses coupled (mixed-mode behavior). Analytical solutions are obtained for displacements of the backing, forces in the backing, and stresses between the adhesive and the backing.     

Pre-spinodal thermal decomposition of condensed matter

It is proposed that contact methods of thermal analysis (print and application methods, sputtering) be used to study thermal decomposition and determine the allowable superheating of explosives. Experimental data on allowable superheating is presented for certain explosives.Russian University of Chemical Engineering, Moscow. Translated from Fizika Goreniya Vzryva, Vol. 31, No. 2, pp. 59–66, March–April, 1995.     

An Analysis of the Curling Phenomenon in Viscoelastic Bimaterial Strips

A mathematical analysis is performed to obtain relations for the radius of curvature and flexural moments for initially stretched bimaterial strips in which at least one of the materials exhibits viscoelastic behavior. One practical application of this analysis is for pressure sensitive tapes. Consequently, the radius of curvature and flexural moment relations are obtained as functions of backing and adhesive thicknesses and moduli for typical pressure sensitive tapes. The analysis shows that the flexural moment decreases as the backing thickness and/or backing modulus increase. Furthermore, the flexural moment decreases as the adhesive thickness and/or adhesive modulus decreases.     

Effect of anode backing layer on the cell performance of a direct methanol fuel cell

We investigated experimentally the effect of the anode backing layers consisting of carbon papers with different thicknesses and different polytetrafluoroethylene (PTFE) contents on the cell performance of a direct methanol fuel cell (DMFC). The membrane electrode assemblies were prepared using the decal method such that the effect of different anode backing layers could be studied with the same anode catalyst layer, the same membrane and the same cathode. We found that a too thin anode backing layer resulted in lower cell voltages in the entire current density region, whereas a too thick backing layer led to a lower limiting current density. The reduced cell performance as a result of thinning the backing layer may be attributed mainly to the increased under-rib mass transport polarization as a result of weaker under-rib convection in a thinner backing layer. The experimental results also showed that the use of a PTFE-treated backing layer resulted in a lower limiting current density, attributing primarily to the increased mass transfer resistance as a result of the PTFE treatment.     

An Analysis of the Curling Phenomenon in Viscoelastic Bimaterial Strips

A mathematical analysis is performed to obtain relations for the radius of curvature and flexural moments for initially stretched bimaterial strips in which at least one of the materials exhibits viscoelastic behavior. One practical application of this analysis is for pressure sensitive tapes. Consequently, the radius of curvature and flexural moment relations are obtained as functions of backing and adhesive thicknesses and moduli for typical pressure sensitive tapes. The analysis shows that the flexural moment decreases as the backing thickness and/or backing modulus increase. Furthermore, the flexural moment decreases as the adhesive thickness and/or adhesive modulus decreases.