液压泵故障的处理

液压技术在冶金行业得到广泛应用，但因设计不当造成的液压事故，严重地束缚生产的正常运行，我厂就曾因液压管路设计不当，导致液压泵故障，造成设备停机。     

轧机AGC液压系统故障诊断研究

轧机AGC液压控制系统是生产高质量板材的核心,其运行的可靠性直接影响设备的正常运转和产品质量,针对轧机液压控制系统常见故障进行了分析,研究运用故障树分析方法进行AGC液压控制系统的故障快速诊断。采用故障树分析方法,可以直观的进行故障诊断次序排查,迅速定位和排除故障。     

热轧下支承辊油膜轴承定位系统故障分析

以太钢1549mm热轧线的故障实例为对象，分析了因下支承辊定位系统异常引发的油膜轴承密封系统故障的原因，为现场油膜轴承正常运转提供经验。     

天钢高速线材厂集卷液压系统的分析

天钢集团高速线材厂集卷区是高线厂的关键部位,是线材成型的必经之路,其主要动作靠液压系统驱动,液压系统的运转正常与否对集卷区主要设备的运转起着决定性的作用,文章对保证该液压系统正常运转的因素进行了分析并提出了解决办法.     

矿山工程机械液压传动系统的故障及对策分析

随着我国经济体制改革不断深入,工业飞速发展,带动了矿山工程机械的发展。工程机械作为工业企业的重要生产资料,它是企业正常运转的重要前提,对企业的发展有着十分重要的意义。当前,我国的矿山工程机械多数由液压传统系统构成,这个系统是机械正常运转的重要前提,但是,由于不间断工作,该系统极其容易出现故障,引起了人们的广泛关注。     

Metso HP 500圆锥破碎机液压系统优化完善

通过对Metso HP500圆锥破碎机液压系统的设计特点和功能进行分析,找出了因厂商局限液压系统内安全阀的调节引发的生产过程中出现的种种问题,压力安全阀被设计为不可调节,不能自动泄压,易损坏管道密封件,造成设备不能正常工作。为此,引入压力调节阀,确保了液压系统锁紧回路、释放回路、液压马达回路的正常运转,使设备运行更加可靠稳定,从而延长了设备的使用寿命,降低了成本,取得了显著的经济效益。     

螺纹轧钢厂液压设备故障诊断技术的研究

液压设备是一种利用液压能进行动力传递与控制的设备装置,具有动力强劲、控制灵活的优点,在相关应用领域中得到了广泛的应用。本文针对液压设备故障产生的原因进行分析研究,采取科学合理的诊断技术,并及时有效地处理存在的故障,确保螺纹轧钢厂液压设备安全稳定的运转。     

高炉液压泥炮改进

结合炼铁厂炉前设备的调试，对液压泥炮故障进行了分析和改进，提高了液压泥炮的使用可靠性及寿命，为高炉的正常生产提供了保障。     

螺纹轧钢厂液压设备故障诊断技术的研究

液压设备是一种利用液压能进行动力传递与控制的设备装置,具有动力强劲、控制灵活的优点,在相关应用领域中得到了广泛的应用。本文针对液压设备故障产生的原因进行分析研究,采取科学合理的诊断技术,并及时有效地处理存在的故障,确保螺纹轧钢厂液压设备安全稳定的运转。     

浅析装载机主传动轴在故障判断中的作用

１引言变速液压系统在装载机中是一重要部位，如发生故障将导致装载机工作性能下降，甚至不能正常工作。变速液压系统较为复杂，且液压系统之不可见性，致使故障判断较为困难。尤其在判断故障具体部位时，如果判断失误，就车拆检工作量大，将造成较大的人力物力浪费，且影...     

Hydraulic Roughness of Biofouled Pipes, Biofilm Character, and Measured Improvements from Cleaning

The hydraulic performance of pipelines can be significantly affected by the presence of biological growth on internal surfaces. The change in wall roughness brought about by the biofilms has been studied by the use of headloss tests, precleaning and postcleaning of the pipelines in three Tasmanian hydroelectric schemes. Results of the headloss testing show that improvements to hydraulic efficiency can be achieved from the cleaning of biofouling material. The data, when plotted as a Moody diagram, shows that the friction law for conduits roughened by biological growths may not always follow a Colebrook-White type relationship, although the results are too narrow in Reynolds number to be conclusive. It was found that bacteria made up the majority of the biofilm biomass in the pipelines studied. Based on molecular analysis, members of the class Alphaproteobacteria were the most frequently detected followed by members of the phylum Chloroflexi.     

60t电弧炉液压系统的优化设计

介绍了电弧炉电极升降新液压系统的优化设计，并对旧液压系统的改造以及改造的效果进行了评述。     

Sepiolite as an Alternative Liner Material in Municipal Solid Waste Landfills

Compacted clay has traditionally been used as a lining material in municipal solid waste landfills. However, natural clays may not always provide good contaminant sorption properties. One alternative material that is abundant in some parts of Europe and Turkey as well as Western United States is sepiolite. A laboratory study was undertaken to investigate the feasibility of sepiolite as a liner material. Two clays, one rich in sepiolite and the other one rich in kaolinite mineral, as well as their mixtures were subjected to geomechanical, hydraulic, and environmental tests. The same soils were also subjected to strength and hydraulic conductivity tests after a series of freeze and thaw cycles. The results of the study indicated that relatively high hydraulic conductivity and shrinkage capacity of sepiolite necessitates addition of kaolinite before being used as a landfill material. The valence of the salt solutions affected the swell and hydraulic conductivity characteristics of the clays tested. Retardation factors for sepiolite for metal solutions are 1.2–2.2 times higher than those calculated for the clay that is rich in kaolinite, and the inorganic contaminant adsorption capacity of the clay can be improved by addition of sepiolite. The results indicated that the clay mixtures utilized in this study provide good geomechanical, hydraulic, and metal adsorption properties which may justify their potential use as a liner material in solid waste landfills.     

连铸机振动液压系统改造

振动区液压系统是板坯连铸机结晶器的动力源,其运行稳定与否直接关系到连铸坯的质量,而液压站主泵损坯的原因为油液污染和油温高所致。分析了油液污染严重、温度高的原因,并给出了相应改进措施。实施效果明显,保证了150 t板坯连铸机的稳定运行,为同类型液压系统维护提供了参考。     

Foundry Green Sands as Hydraulic Barriers: Field Study

A field study was conducted to determine if the field hydraulic conductivity of barrier layers constructed with foundry green sand is comparable to the hydraulic conductivity measured in the laboratory on laboratory-compacted specimens normally used for testing during design. Three test pads were constructed with foundry green sand. Their field hydraulic conductivity was measured using sealed double ring infiltrometers, two-stage borehole permeameters, and on large block specimens. Additional field hydraulic conductivity tests were conducted on the test pads after exposure to winter weather causing freeze-thaw cycling and summer weather causing desiccation. The field hydraulic conductivity data followed the same trends with bentonite content and liquid limit observed in the laboratory. When the bentonite content is greater than 6% (by weight), the plasticity index is greater than 3, or the liquid limit is greater than 20, the hydraulic conductivity is less than 10?7?cm/s. Testing after winter exposure showed that the field hydraulic conductivity was unaffected by winter weather, even though the test pads underwent up to six freeze-thaw cycles (depending on depth). Similarly, exposing the test pads to summer weather had no measurable effect on the field hydraulic conductivity. The field study validated that foundry sand is a useful industrial by-product that can be beneficially used as a hydraulic barrier material.     

钢卷车卸卷故障的分析和处理

宝钢1420冷轧酸轧机组投产以来,一直存在钢卷车卸卷不良的问题,严重影响了正常生产,通过多次试验,排除了液压系统各元件本身的问题,确定钢卷车卸卷时下降过大是由于液压系统的弹性变形引起的,并通过测量钢卷车系统的弹性模量验证了钢卷车下降的原因。采取了改变减压阀设定值的解决方案,使钢卷车卸卷故障得到了彻底解决。     

邯钢380 m3高炉小修喷补后开炉风口二套连续烧坏处理

邯钢6号（380m^3）高炉小修喷补后开炉过程中，因喷补料影响，使渣中Al2O3含量高，渣铁流动性差，无法及时排净渣铁，导致风口二套连续烧坏。分析了产生的原因后，从4个方面采取处理措施，解决了风口二套连续烧坏的问题，使开炉进度加快。     

三辊轧管机液压系统的改进措施

针对三辊轧管机换辊时上机盖难以打开以及油缸漏油的问题，进行了仔细的分析、研究和计算。结果表明，其原因主要是油缸驱动力矩不够；油缸回油背压太大和并帽直接受力所致。据此，提出了改进措施。     

原料粉末对制备碳化钒的影响

为工业化生产提供实验室研究基础,本文以V2O5和纳米碳黑为原料,利用碳热还原法,在常压下碳管炉中得到了V8C7粉末。通过X射线衍射仪(XRD)、扫描电镜(SEM),分析了原料对反应进程的影响。结果表明:采用普通球磨干混的方式时,比表面积(BET)为112m2/g的碳黑可以加速反应进程,过低或过高都不利于反应的进行;细粒径的V2O5原始粉末可明显加快反应进程,最终得到大小均匀,粒度1μm以下的球形碳化钒粉末。反应机理研究表明,固-固反应的速率与反应组元的颗粒大小和混合均匀程度,以及不同反应组元之间的接触面积有很大关系。     

Hydrodynamic Characteristics in Biotrickling Filters as Affected by Packing Material and Hydraulic Loading Rate

Hydrodynamics in biotrickling filters can be strongly influenced by packing material geometry and hydraulic loading rate. While it is generally accepted that increasing wetted area in a biotrickling filter can improve process performance, additional research on synthetic packing materials and parameters that improve hydrodynamics, resulting in increased wetted area, is desirable. For this research, a series of tracer tests was conducted to compare hydrodynamics in bench scale biotrickling filters with three different packing materials under three different flow rates. Results suggest that of the three packing materials, the material with the highest specific surface area resulted in channeling and excessive formation of stagnant zones within the biotrickling filters. Liquid distribution through the biotrickling filters substantially improved at a hydraulic loading rate of 1.9?m/hr for all packing materials, but based on these experiments, improvements were minimal when the hydraulic loading rate was increased further. The presence of a biofilm increased mean residence time in biotrickling filters and the factor by which the increase was observed decreased with increasing hydraulic loading rate.