复合式空气干燥器在压缩空气后处理中的成功应用

文中简单介绍了复合式空气干燥器的特点和在压缩空气后处理中的使用情况,并证明使用了该干燥器后,保证了净化风的质量,从而确保了全厂装置的安全用风,有效降低了能耗,取得了显著的经济效益,同时也提出了以后改进发展的方向。     

750 kV两站两线科研项目管理

针对兰州超高压输变电公司科研项目管理模式进行了研究与分析,提出了科研项目分解的方案,通过本方案明确了基本课题,可以较为全面、系统指导科研工作的开展,增强了科研项目实施的可操作性。构建了矩阵式科研项目管理组织结构,优化配置了公司各科研资源,明确了科研项目的各主要责任主体。确立了科研项目管理流程,做到闭环控制,加强了科研项目过程管理。     

棉纺行业设备节能探讨

<正> 近几年来,节能工作在棉纺行业已引起了足够的重视,通过认真宣传和贯彻国务院《节约能源管理暂行条例》,提高了广大干部职工的节能意识。相继成立了专职节能机构,建立了能源管理制度,狠抓了节能基础管理工作,加强了能源统计,实行了定额考核,开展了企     

活塞支撑杆测量仪的设计

活塞支撑杆测量仪的设计及应用,代替了传统的测量法,实现了不同种类大批量支撑杆快速测量,降低了工人的劳动强度,提高了测量的准确性及活塞盐芯的位置精度,减少了测量时间,提高了生产效率。     

实施PDM系统为企业带来的价值

阐述了PDM系统的功能,现代企业利用该系统对数据进行分类管理,缩短了新产品开发周期,降低了产品成本,提高了企业的管理能力,促进了企业的发展.     

棉纺行业设备节能探讨

近几年来,节能工作在棉纺行业,已引起了足够的重视。通过认真宣传和贯彻国务院《节能条例》,提高了广大干部职工的节能意识,建立了专职节能机构,健全了能源管理制度,加强了节能基础管理工作,实行定额考核目标管理,开展了企业能量平衡工作,以及实行了不同形式的用能承包经济责任制,均取得了显著的节能效果。因此,摆在棉纺企业面前的重要任务是如何将企业的     

有限元弹性动力分析与优化在某气门机构中的应用

对某发动机气门机构建立了混合刚体-弹性体的参数化非线性有限元模型,进行了弹性动力学计算。通过回归方程对模型进行了优化,降低了摇臂的质量,在保证摇臂强度的同时改善了凸轮-滚子的接触性能,从而降低了磨损,提高了耐久性。     

水轮发电机组电气制动的应用实践

大唐石泉水电厂水轮发电机组采用电气制动停机系统,缩短了停机时间,大大改善了机组的停机工况,消除了机械制动时,制动块与制动环因摩擦而引起的机械疲劳,同时洁净了环境,提高了机组控制的自动化水平,为电站"少人值班,无人值守"的发展提供了可能,同时提高了发电机的安全运行水平.     

气缸套铸模结构对铸造缺陷的影响

本文介绍了以前气缸套铸模结构的一些特点 ,指出了铸模结构影响缸套质量的不合理设计 ;提出了模具设计的新思路 ,并在应用中明显减少了铸造缺陷 ,提高了铸造合格率 ,产生了显著的经济效益。     

300MW煤粉煤气混烧发电锅炉的节能研究

某钢铁公司发电厂通过建设300MW的煤粉煤气混烧发电机组,充分利用钢铁厂生产过程中产生的大量富裕高炉煤气和焦炉煤气,进行煤、气混烧发电,基本杜绝了高炉煤气的放散,有效利用了低热值的二次能源,而且保证了发电负荷的稳定,为企业提供了供电保证,达到了节能、减排、保障供电的目标,实现了钢铁工业和发电行业的有机结合,践行了循环经济理念,取得了良好的经济效益和环保效益。     

小型锅炉烟尘测试时锅炉出力的计算

锅炉烟尘测试时,必须对锅炉出力进行测试。但监测中,许多小型锅炉往往不具备相关的计量装置和仪表,为解决这一问题,文章提出了用烟气量和空气过剩系数来计算锅炉的出力的公式,在实际使用中,该方法简单易行,其结果和实测值具有很好的一致怀。     

Unerroric of control of mutual compliance of the efficiency of hydrogen engines of unmanned vehicles in the conditions of mass production

The issues related to the reliability of hydrogen engines of unmanned vehicles and increasing the efficiency of using hydrogen as fuel when using the method of its production during the decomposition of hydrogen-containing molecules of liquid-phase organic compounds in a plasma discharge under the action of intense ultrasonic exposure are considered. Experiments have shown that as a result of decomposition in the acoustoplasma discharge of liquid hydrocarbons, solid-phase carbon-containing products are formed, chemical transformations occur in the liquid phase and hydrogen-containing combustible gas is formed. Hydrogen-containing gas can be used as fuel immediately after synthesis, i.e. it does not require separation, since in addition to hydrogen it contains only impurities of CO₂ and water vapor. The purpose of the study is to formalize the basic conditions for tightening the control of mutual compliance with the efficiency of hydrogen engines of the same series in the conditions of their mass production. Methods of mathematical statistics and hardware-software modeling were used in the study. The term “unerroric of quality mutual compliance control” is introduced to describe a set of hardware and software tools for such control. The principle of in-depth testing of the technical condition of such engines of one series is described in a multidimensional formulation of the quality control problem for three of their operating parameters at once. The conditions for increasing the mutual correspondence of the measured values of such parameters in the conditions of serial production of hydrogen engines are formalized.     

中国煤炭地下气化技术的发展

本文综述了煤炭地下汽化技术的国内外发展现状,对我国“长通道、大断面”煤炭地下气化新工艺给予了技术经济评述,并提出了发展煤炭地下汽化技术的政策建议。     

Review of theory of distortion and disintegration of liquid streams

Linear and nonlinear analyses of the instabilities and distortion of liquid streams injected into a gaseous media are discussed. The various fundamental mechanisms and the predictive capabilities for the distortions are emphasized. Round jets, planar sheets, annular sheets, and conical sheets are discussed in detail. The balance between capillary and inertial forces is primarily examined. The method for simplifying the analyses in the case of thin liquid sheets is discussed. The capabilities for representing the droplet size distribution that follows the stream disintegration are outlined.     

机车车轮多轴疲劳强度安全评定的研究

使用ANSYS8.0软件对高速列车车轮进行了三维有限元分析,计算出车轮在直线、曲线和道岔条件下牵引、制动共6种工况时孔边薄弱部位的应力,分别通过Mises等效平均应力方法、Sines平均主应力方法和应力分量中考虑平均应力方法计算出应力在极值位置时的等效应力幅、等效平均应力,从而进一步算出车轮的安全系数,对其疲劳强度进行评定,并对3种方法进行了比较研究。     

Constructal optimization of the geometry of an array of micro-channels

This paper documents the geometric optimization of an array of circular and non-circular ducts. The optimization was carried out numerically using finite volume method. As optimal dimensions were independent of the array configuration, the numerical simulation was performed on a unit cell. Numerical optimization for circular, square and isosceles right triangle cross-sections of channels was performed. Based on the results of this investigation, some correlations were proposed to predict the optimal hydraulic diameter and dimensionless heat transfer per unit volume. In addition to examining the effect of pressure drop on these parameters, it was showed that among the different geometries of this study, square cross-section has the most efficiency for a given volume. The numerical results of the present study were compared with approximate results reported in the literature which a good agreement was observed.     

MgO膨胀剂细度对MgO水化和水泥浆体膨胀的影响

基于《水工混凝土掺用氧化镁技术规范》中的Ⅰ型氧化镁（MgO）,研究了该型MgO膨胀剂（MEA）细度对掺粉煤灰水泥浆体膨胀性能的影响。即采用X射线衍射分析(XRD)及同步热分析（TG DSC）分析了掺MEA水泥浆体中MgO的水化性。结果表明,养护温度相同时,MEA的细度对水泥浆体内MEA中MgO的水化和水泥浆体的膨胀无显著影响,产生的膨胀均能补偿水泥浆体的收缩;MEA的细度可从试验设计采用的45 μm筛筛余15%左右增加到30%左右,这将有利于MEA生产企业的节能降耗。     

固体热辐射Yong性能分析

本文对漫灰均温物体在常物性条件下对外辐射传热的Ｙｏｎｇ值计算建立了数学模型。通过与物体内能Ｙｏｎｇ公式的数值计算比较,得出了辐射能量的Ｙｏｎｇ值不大于内能Ｙｏｎｇ值的结论。从初步的热射Ｙｏｎｇ值计算公式发现。Ｙｏｎｇ与物体表面辐射率有关。     

Measurements of concentration distribution of hydrogen jet using deflection of center of the laser spot

The main purpose of this work is to propose a new method to evaluate the concentration distribution of the hydrogen jet by using a He–Ne laser through the jet. This research attempts to apply the expression of concentration Gaussian distribution, the refraction formula of inhomogeneous refractive index medium, and the concentration inversion function to disclose the displacement of the center of the laser spot at different heights in the gas jet. The spot images of the laser beam passing through the gas jet at three vertical heights z = 10d, 20d, 30d, and different radial positions are obtained. The radial spatial asymmetry of the gas jet is also found in the experiment. Finally, the calculated concentration distribution curve and the fluent simulation curve, it is found that the two results are very similar. Our findings show that the error between the concentration distribution of this method and the simulated concentration distribution reaches 2.43%.     

汽轮机零件防锈性能的改善

介绍了汽轮机零件的封存特点、防锈要求及防锈油性能对比试验的方法,通过对试验结果的对比分析,客观验证了各种防锈油的性能。试验表明,只有选择了合适的防锈油,才能保证汽轮机零件长期封存的质量。