The Effect of Shear-Thinning on Film Thickness for Space Lubricants

The authors show that the difference between effective pressure-viscosity coefficients, obtained from film thickness, and coefficients obtained from viscometers for a PFPE space lubricant is substantially the result of shear thinning in the inlet zone of concentrated contact. Flow curves for the PFPE and a multialkylated cyclopentane are presented along with film calculations based on the Carreau model.     

Friction and Wear Protection Performance of Synthetic Siloxane Lubricants

Several new siloxane lubricants were synthesized with linear and ring-shaped branch structures of various lengths and branch contents, aiming at a search for better molecular design for lower boundary friction and more effective surface protection against wear of materials. Their molecular structure and mass were measured by means of nuclear magnetic resonance and gel permeation chromatography, respectively. The new lubricants were compared with commercially available polysiloxanes, poly-α-olefins, and perfluoropolyether in lubricating a steel ball-on-steel disk interface using a tribotester at a load of 1.76 GPa and an entrainment speed of 0.025 m/s. The results are used to explain the effects of alkyl branch length L, pendant type J, percent of branch functional monomers Q, and degree of polymerization DP on siloxane design for the most effective boundary lubrication.     

Effect of Starvation on Traction and Film Thickness in Thermo-EHL Line Contacts with Shear-Thinning Lubricants

The effect of starvation on traction and film thickness behavior in thermo-EHL rolling/sliding line contacts has been studied using full EHL simulations. The simulations employed the free volume equation for viscosity–pressure–temperature relationship and Carreau viscosity model to describe the shear-thinning behavior of the EHL lubricant. The simulation results were used to develop equations for estimating the factors by which the traction coefficient increases and film thickness decreases as a function of the degree of starvation. For the situations involving inadequate lubricant supply at the inlet, these factors can be used to correct the traction coefficient and central film thickness predicted with the assumption of fully flooded condition.     

一种值得推广应用的实用新型高效节能烤烟机

阐述了KY-4／200实用新型高效节能烤烟机的结构特点、工作原理及使用效果，通过该烤烟机与传统烘烤方式的对比，新型烤烟机显现出明显的优势。     

基于能源合理利用的液压系统设计

该文从科学发展观的视角 ,论述了液压系统设计中的能源合理利用的意义、原理和方法     

自动化技术满足高效与节能

第十一届国际现代工厂／过程自动化技术与装备展（FA／PA2007）于6月21-24日在北京国际展览中心隆重举行，其中的高峰论坛更是受到了业内人士的高度关注，现场听众达到200多人，来自相关领域的专家和众多业界知名厂商如：西门子、三菱、罗克韦尔、施耐德等公司都在此次高峰论坛进行了专题演讲。《中国仪器仪表》杂志记者针对自动化技术的相关话题专访了西门子（中国）有限公司自动化与驱动集团自动化系统部市场部经理杨大汉先生。[编者按]     

日光节能温室高效栽培技术

随着农村农业结构的调整改革,高产、优质、低耗、高效已经成为很多地区蔬菜培育的发展点,以提高温室蔬菜产出率和农产品收入为目的,结合日常生产实际,总结出一系列适合本地的温室管理技术,以真正达到丰产的实效。     

介绍一种新型纳米润滑剂

新型纳米润滑剂能溶解于任何矿物、台成油基,甚至植物油基,使润滑机理有了质的改变,由此出现一种全新的薄膜润滑理论.本文介绍新型MWP机械润滑剂的润滑机理、优点、节能效果、经济效益和适用范围.     

螺杆压缩机高能效设计法

为进一步提高现有螺杆压缩机机型的高能效,从理论型线新设计高精度空间螺旋齿廓高效轭合展成法、机体结构配置新颖设计和材质新工艺几个方面。浅谈自己的设计心得。     

移动通信基站空调节能技术方案分析

移动通信基站特性的要求了基站的环境温湿度全年必须控锚在一定的范围内,目前主要依靠空调设备来保证。由于基站数量众多,总体的耗能量很大,节能降耗是通信运营行业的必然趋势。根据移动通信基站的特点,从空气调节、热交换、电力因素等几方面提出了节能技术方案,并作了简要分析。     

利用补偿装置来解决电气化铁路电能质量问题

针对电气化铁路的电能质量的几个关键问题进行了分析,并在此基础上提出了将SVC应用到电气化铁路供电系统中去。根据具体工程案例简要说明了SVC在治理电气化铁路电能质量过程中的作用,并对其经济性进行了简单描述。     

德马吉致力发展节能加工技术和节能机床

德马吉最新开发的“DMG ENERG Ysaving”（德马吉节能）软件和服务使机床的开发、生产和使用更节能     

高效节能的600MW等级燃煤发电汽轮机

介绍了亚临界、超临界、超超临界600MW等级燃煤汽轮机的技术特点.超超临界600Mw等级燃煤机组集中了在高温材料、提高热效率、结构优化设计等方面的先进技术,其经济性和安全可靠性达到世界先进水平.在我国高效洁净燃煤发电领域具有广阔的发展前景.     

捷太格特携节能高效产品参展

正捷太格特(中国)投资有限公司(以下简称捷太格特JTEKT)以安全、环保、舒适三方面为宗旨,致力于生产节能环保、值得社会信赖的产品。捷太格特JTEKT的汽车转向系统、传动系统,各产业用轴承和机床等四大类别的产品,覆盖各个工业领域。尤其作为汽车零部件系统供应商,捷太格特JTEKT开发了世界上第一台电动助力转向器(EPS),并在轿车用     

高效永磁同步电动机的技术开发和应用

高效率电动机的开发和应用,在世界各国都引起了重视.能源部门把推广使用高效率电动机作为国家节约电能的重要措施.利用高磁场永磁材料钕铁硼装入电动机转子中,成为高效永磁同步电动机,能提高效率,节能效果显著,而这仅仅是钕铁硼在电机技术应用中种的一种.     

基于小生境遗传算法的风火电节能调度研究

考虑风能为可再生能源的主要方式,建立了以运行成本与污染排放为目标函数的多目标风火发电节能优化调度模型,通过改进的小生境遗传算法对模型求解,并用不同的权重系数表明区域内的多目标决策偏好,以达到发电经济性与环境保护的协调优化。结果表明该模型最小运行成本降低了15％,旋转备用容量增加了700MW左右,达到了优化目标。     

变容量空调器的季节能效比的计算和分析

利用某变容量家用中央空调器性能参数,拟合出该空调器制冷量、输入功率、EER与负荷率的变化关系.利用我国近30年来的逐时气象资料,建立了广州、武汉、上海、杭州、重庆地区的温区统计数据,计算出了5个城市的季节能效比（SEER）.同时对武汉地区某空调器4个运行模式的季节能效比进行了计算,指出要反映空调器的实际运行条件下的季节能效比,还必须考虑空调器的实际运行时段.     

Towards Energy Efficient Shape Rolling:Roll Pass Optimal Design and Case Studies

Shape rolling is widely employed in the production of long workpieces with appropriate cross-section profiles for other industrial applications. In the development of shape rolling systems, roll pass design(RPD) plays an essential role on the quality control of products, service life of rolls, productivity of rolling systems, as well as energy consumption of rolling operations. This study attempts to establish a generic strategy based on hybrid modeling and an improved genetic algorithm, to support the optimizations of RPD and shape rolling operations at a systematic perspective.Objectives include improving the quality and e ciency of RPD, reducing energy consumption of shape rolling, as well as releasing the demands on costly trails and expert knowledge in RPD. Hybrid modeling based on cross-disciplinary knowledge is developed to overcome the limitations of isolated single-disciplinary models. And conventional genetic algorithm is improved for the implementation of optimal design. Targeting to integrate empirical data and published reliable solutions into optimizations, a parameters estimation method is proposed to transfer the initially misaligned models into a uniform pattern. A tool based on the Matlab platform is developed to demonstrate the optimal design operations, with case studies involved to validate the proposed methodology.     

新一代高效节能LEHY-MRL无机房乘客电梯

分析了无机房电梯开发需要解决的关键技术,分别从无机房化布置、永磁同步无齿轮曳引机、轿厢固定装置、平衡救援技术、电源系统、能量回馈技术等方面介绍了LEHY-MRL无机房电梯采用的先进技术。     

能效型步行机模型及其步态控制问题的计算机辅助研究

本文研究了机体坐标系型腿足机构步行机的能量效率问题, 提出了具有几个能动自由度的缩放式腿足机构昆虫姿态六足步行机模型, 研究了该模型的步态控制问题.最后, 用计算机仿真技术动态显示了该模型跨越障碍及在不平坦地面上的安全步行姿态.