酚醛树脂复合板在热连轧机中的应用

重点分析了现有F7机架出口导卫装置的情况。原导卫材料是由铸钢制造 ,由于摩擦和高温常常引起热连轧带钢表面划伤 ,根据现场实际情况用酚醛树脂复合板替代铸钢导卫装置。实践表明 ,这种改造即可行又可靠 ,并取得了好的效果     

安居水电厂灯泡贯流式水轮发电机组的试运行

本文对安居水电厂2台灯泡贯流式水轮发电机组自投入试运行以来,出现的受油器壳体开裂、导叶接力器缸体和活塞拉伤、转轮桨叶传动拐臂连接销脱落、导叶外轴承座漏水、主轴工作密封漏水侵入水导轴承、锁锭装置固定螺钉剪断等故障的经过、原因分析及其处理办法进行了叙述。     

大型复杂高精度波导钎焊设备的研制：简介ZHS—132型真空钎焊炉

应军事电子装备，特别是军用雷达预研和生产的急需，电子工业部第二研究所近期研制的成功大型、复杂、高精度波导钎焊设备ＺＨＳ－１３２型真空钎焊炉。文中主要介绍了该设备的开发背景和对波导钎焊工艺的影响，该设备的设计构思、结构和技术特征，使用功能和效果，以及推广应用前景。     

双模轮胎硫化机结构的优化设计

我们在双模轮胎硫化机结构的优化设计中,提出了一种ANSYS与导重准则相结合的优化方法。该方法收敛快,一般只需约5至7次优化迭代计算即可得到十分显著的优化效果,大大提高了优化效率与设计质量。     

变焦距镜头变倍组和补偿组移动导轨的设计

本文通过典型变焦距镜头的实例和图形,详细介绍了机械补偿变焦距镜头几种常用的变倍组和补偿组在变焦过程中往复运动导轨的结构形式,及其各种结构形式的优缺点。并论述了设计各种形式导轨机构应注意的问题。     

降低棒线导辊消耗的技术措施

分析了影响导辊使用寿命的因素，采取了相应的技术措施，有效地降低了导辊的消耗量。     

Experimental and computational analysis on guide vane losses of impulse turbine for wave energy conversion

This paper deals with the detailed flow analysis of impulse turbine with experimental and computed results for wave energy power conversion. Initially, several turbulence models have been used in two-dimensional (2-D) computational fluid dynamic (CFD) analysis to find a suitable model for this kind of slow speed unconventional turbine. Experiments have been conducted to validate the CFD results and also to analyze the aerodynamics at various stations of the turbine. The three-dimensional (3-D) CFD model with tip clearance has been generated to predict the internal flow and to understand the effect of tip clearance leakage flow on behavior of the turbine in design and off-design conditions. As a result, it is found from the 2-D results that the comparison between computed and experimental data is good, qualitatively and the turbulence model, standard k–ε can predict the experimental values reasonably well, especially the efficiency of the turbine. Experimental results reveal that the downstream guide vanes are more responsible for low efficiency of the turbine and it is measured that 21% average pressure is lost due to downstream guide vanes. It is proved from the 3-D CFD model with tip clearance that it can predict the experimental values quantitatively and qualitatively. Furthermore, it is estimated from the computed results that the efficiency of the turbine has been reduced about 4%, due to tip clearance leakage flow at higher flow coefficients.     

转炉煤气风机叶轮故障诊断及处理措施

对转炉煤气风机叶轮故障进行诊断,分析了故障产生的原因,提出了处理措施,延长了设备使用寿命。     

色彩教学中创作意识引导的意义

文章结合毕业创作课程的体会,从毕业创作的"果"反思色彩教学中的"因",将毕业创作课程发现的问题进行"因果"反思,提出为什么要在色彩教学中引导学生的创作意识。通过在色彩教学过程中的思考与实践,探讨如何能更好地引导以增强学生的创作意识。文章认为基础教学与创作脱离,会导致学生缺少在绘画实践和主观情感表达的领悟,教学的最终目的是通过课程训练来开发学生的创造性思维,增进绘画技能的同时也应多关注学生自身表达的欲望。     

双作用变量叶片泵自动控制系统的机理分析

文章介绍了一种双作用变量叶片泵自动控制系统,通过电脑控制变频器,改变叶片泵转速,达到粗调目的;电脑控制电液数字阀,起微调作用.蓄能器的利用,进一步增了系统的稳定性.