An operation analysis of movable rack type AS/RS by use of system simulator

We perform the operation analyses of movable rack type AS/RS which is built in among manufacturing resources. Processing time and processing cost to handle each pallet are investigated. We employ the system simulator approach for the analyses. It is clarified that, if the operation conditions such as the speed of the stacker crane and/or rack are properly adjusted, the processing time of each pallet is not so increased in comparison with that in the fixed rack type case. Further, under our assumed conditions concerning the investment, we found that the cost performance of the movable rack type AS/RS accompanied with medium speed stacker crane is comparable with that of the fixed rack type AS/RS equipped with high speed stacker crane.     

小浪底工程进水塔4000kN门机设计特点

小浪底工程进水塔４０００ｋＮ门机起升吨位大、扬程高、跨度大、控制设备多、控制要求高、担负的作业繁重，因而设计难度大。文章重点介绍了采用折线卷筒多层缠绕技术解决大吨位、高扬程启闭机设计时应注意的问题，采用偏轨小车代替回转吊的优越性和超长偏轨梁与主梁的连接方式及上拱设计时应注意的问题，门机及自动抓梁和清污机的电器控制要求、安全保护措施，主、副司机室的控制分工和大车供电等方面的设计特点。     

推杆齿条传动的参数设计

介绍了推杆齿条传动的的基本结构和传动原理,给出了推杆齿条传动主要参数的设计公式与推荐值,为该传动的设计及加工制造提供了理论依据.     

柴油发电机组安装架结构改进分析

为合理地选择柴油发电机组安装架的结构形式和支承位置,对柴油发电机组安装架在运用中出现的问题进行了分析,并结合安装架的受力特点,提出两种设计方案。为比较两种方案的可行性,采用有限元方法对两种设计方案安装架的强度和刚度进行计算、分析和比较。计算结果表明,两种方案的强度、垂向刚度均能满足设计要求,但方案二的扭转刚度明显优于方案一。     

推杆齿条传动的齿廓修形分析

根据推杆齿条传动的传动原理和齿条理论廓线方程,利用齿廓修形的原理,对理论齿廓进行修形的几种方法进行了分析,为该传动齿条的齿形优化设计及加工制造提供了理论依据.     

酶法控制阴离子垃圾及实验室评价方法

分析了造纸系统中阴离子垃圾的主要来源,介绍了酶法控制阴离子垃圾的潜在优势,并给出了实验室的评价方法。     

齿条型刀具基本齿廓的改进

为提高外啮合渐开线圆柱齿轮的齿根弯曲强度 ,针对齿条型刀具提出了减小刀具齿顶高并同时加大其齿顶过渡圆弧半径的改进方案。确定了在保证齿轮工作时不发生过渡曲线干涉且不改变齿轮有效齿面的前提下刀具的最小齿顶高系数 ,并建议在齿轮刀具标准中增加刀具齿顶高系数系列。     

混凝土浮力研究

结合某循环水进水管沟混凝土施工实例,根据施工实际情况,就混凝土浮力分析及计算进行了研究,使混凝土浮力计算值更接近其真实值,为抗浮措施的实施奠定了基础。     

Development of ITER divertor Thomson scattering support structure design on the basis of engineering analyses

The support structure for divertor Thomson scattering equipment – the front diagnostic rack, which actually plays plugging role of the divertor port, should be designed to sustain the severe ITER conditions. Meeting the requirements of multifield analyses (which often contradict each other) results in an iterative design process. A number of design variants based on engineering analyses results were developed in 2011–2012. We study here the close to the final design of the diagnostic rack for consistency to electromagnetic, thermal and seismic loads. The specific ITER environment imposes a restricted list of materials and requires a careful design of optical elements to accommodate their thermal expansion. Special attention is focused on the mirror deformed shape under operating loading conditions and its effect on optical system performance, which is vital for all optical systems with mirrors specially designed for the ITER.     

深圳抽水蓄能电站上水库进/出水口拦污栅设计

抽水蓄能电站的水道布置较为复杂，理想的进水口布置形式常受到输水道条件、扩散段体型等诸多因素的影响和限制。深圳抽水蓄能电站上库进/出水口的拦污栅的布置方式为将栅槽一侧轨道做成斜面，对应的拦污栅支承滑块与之保持对应的斜率，确保拦污栅放置入栅槽后栅叶上的支承滑块与栅槽的轨道面之间没有间隙的半固定式布置方式。实践证明，该布置方式可以有效限制栏污栅在栅槽中的振动，并且可以确保拦污栅的检修条件。