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Ejectors used in vacuum pump systems in the Chemical and Petrochemical industries

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Ejectors used in vacuum pump systems in the Chemical and Pet...

第六届化学工程与生物技术展览暨会议

作者： dr.-ing.AlbertoRiatti

＜正＞ For more than 100 years ejectors have been used in vacuum pump *** are units for the transfer, compression or mixing of gases, vapour, liquids orsolids, in which the gaseous or liquid medium serves as the motiv...

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TECHNOLOGICAL DEVELOPMENT FOR ROLLing MILLS THROUGH COMMON MECHANICS, ELECTRICS AND AUTOMATION DESIGN

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TECHNOLOGICAL DEVELOPMENT FOR ROLLING MILLS THROUGH COMMON M...

中国金属学会2003中国钢铁年会

作者： dr.-ing.Michael Jansen SMS Demag AG Electrical and Automation Systems D-57271 Hilchenbach

＜正＞At SMS Demag, continuous development efforts are made towards the improvement of products, productivity and flexibility of production, production of new materials, stability of the process, maintainability and efficiency of project engineering and commissioning. From these requirements, system solutions are being designed that are characterized by co-ordinated developments in mechanics, electrics and *** of such joint developments from hot rolling are explained, including the "Thin Gauge Rolling Package" for rolling strips on a CSP-mill down to 0.8mm. Joint mechanics and electrics developments not only focus on technology, but also on fast start-up. Start-up times for modernisations and new plants are optimised by performing simulation tests （PILT）.including the original mechanical and electrical equipment in the laboratory before *** the focus on technology-dr.ven solutions and mutual adaptation of mechanics and electrics, SMS-Demag’s electrical and automation portfolio has grown to be a full electrical supplier "from the dr.ve shaft to the process planning system". Solutions and their technical and economical impact are explained.

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State of the Art in High Compression Comminution

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State of the Art in High Compression Comminution

第三届北京国际水泥与混凝土学术会议

作者： dr.-ing. Fritz Feige Chief Editor of "ZKG INTERNATIONAL" Bauverlag GmbH Wiesbaden Germany

Summary The idea of stressing a bulk material between two counterrotating rollers goes back to the 30s. Further investigations in the 70s confirmed that this new principle of operation was also suitable for fine comminution, and led in 1985 to the first high-pressure grinding rolls for industrial use. Since then more than 300 sets of high-pressure grinding rolls have come into use throughout the world;at present these are mainly built by Krupp-Polysius AG, KHD Humboldt Wedag AG, and also by Maschinenfabrik Koppern GmbH & Co KG. The operation of high-pressure grinding rolls is modelled on that of compacting presses. Because of the application of high to very high pressures the ground material generally leaves the roller gap in compacted form;it then requires subsequent disagglomeration for which hammer mills and tube mills are particularly suitable. The proportion of fines released by disagglomeration, defined for example as the material passing 90 urn, may be as high as 40 % depending on the setting and the properties of the material. High compression comminution was first used in *** industry, mainly to increase the output of existing cement grinding plants;since then it has also proved its value in the comminution of cement raw materials, quick lime, ores, and other mineral raw materials. Depending on the technological arrangement, plant configuration and product quality required, the use of high-pressure grinding rolls can lead to increases in throughput of between 30 and 200 % and to power savings of between 15 and 50 %. In a process engineering comparison with roller grinding mills the high-pressure grinding rolls have the advantage from the energy point of view that the layers of material processed in them are subjected to substantially fixed stressing and motional control. On the other hand it is a disadvantage as far as throughput is concerned that high-pressure grinding rolls are still fixed in a speed range of 1.2 to 1.8 m/s, and that such process e

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基于可行性分析的系统设计方法在车辆侧翻风险评估中的应用研究

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汽车技术 2022年第12期 1-8页

作者： dr.-ing.Olena Ivanova ITK工程股份有限公司德国斯图加特70565

为简化研究成果向工业开发的过渡过程,并识别缺失的设计信息,研究了将车辆侧翻风险评估的设计方法映射到基于软件平台嵌入式系统(SPES)模型的系统设计过程。首先,分析了研究方法和工业设计方法间的一般差异,并考虑了在技术和逻辑约束下... 详细信息

为简化研究成果向工业开发的过渡过程,并识别缺失的设计信息,研究了将车辆侧翻风险评估的设计方法映射到基于软件平台嵌入式系统(SPES)模型的系统设计过程。首先,分析了研究方法和工业设计方法间的一般差异,并考虑了在技术和逻辑约束下进行功能概念优化的广义系统设计算法,研究了功能概念所需的设计推导步骤及其系统化方法,这是便于与工业化共同发展所必须的。然后,将物理约束条件和精度要求整合到设计推导算法中,以减少设计工作量和设计迭代循环。最后,以侧翻风险评估为例,给出了必要的精度估计模型,建议将基于可行性分析的验证过程和系统设计方法与定量的系统设计参数优化相结合。

关键词：基于模型的系统工程车辆侧翻风险估计可行性分析

基于早期设计阶段验证的汽车高效安全系统设计(英文)

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汽车技术 2019年第3期 35-41页

作者： dr.-ing.Olena Ivanova ITK工程股份有限公司德国斯图加特70565

在早期概念设计阶段,考虑安全目标和系统动力学特性,通过系统设计验证确认可以提高系统设计效率,因此提出了一种适用于系统行为模型和安全临界约束的正式安全系统设计准则及相应设计方法,安全关键约束定义为在车辆或系统级状态下可观察... 详细信息

在早期概念设计阶段,考虑安全目标和系统动力学特性,通过系统设计验证确认可以提高系统设计效率,因此提出了一种适用于系统行为模型和安全临界约束的正式安全系统设计准则及相应设计方法,安全关键约束定义为在车辆或系统级状态下可观察到的危险域或容错域。对于系统行为模型,给出了所选的项目验证方法,作为系统行为模型的一部分,数学模型考虑了系统动力学特性,这在ISO 26262中未明确考虑,并阐述了将所提出的方法应用于简单系统的过程。正式安全设计准则有助于防止保守设计和复杂动态系统的安全危害,减少分布式开发的协调工作,但由于可能的系统动态复杂性,需要一些工具来进行自动安全系统验证确认。

关键词： ISO 26262 安全系统设计容错域系统动力学模型在环(MiL)

Flood Control and Groundwater Recharge——a contribution to Sustainable Water Management in Beijing

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Flood Control and Groundwater Recharge——a contribution to ...

第4届流域管理和城市供水国际会议

作者： dr.-ing.W.F.Geiger Professor Universitt of Duisburg-Essen Germany

＜正＞ In a joint German-Chinese demonstration project,commonly financed by the Governments ofChina and Germany in Beijing,China it has been demonstrated,that the objectives for floodprotection and groundwater recharge can be combined in intelligent urban dr.inage *** for storage and treatment of polluted storm runoff,for the technical layout ofrecharge facilities and for options to reduce water consumption are explained.

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空心轴未装轴承的角度编码器

制造技术与机床 2003年第4期 12-15页

作者： dr.-ing.Rainer HagI 海德汉公司旋转编码和角度编码器研发部

数控或电子同步轴越来越普遍的使用无框架电动机或密封式空心轴电动机，尤其在机床制造、印刷机械和纺织机械等行业。这对消除如同步齿形带等带来的机械传动误差，提高传动的位置精度，减小速度波动和提高传动的动态特性显得非常重要。... 详细信息

数控或电子同步轴越来越普遍的使用无框架电动机或密封式空心轴电动机，尤其在机床制造、印刷机械和纺织机械等行业。这对消除如同步齿形带等带来的机械传动误差，提高传动的位置精度，减小速度波动和提高传动的动态特性显得非常重要。也比较容易设计象附加轴、夹紧轴或各种轴系的信号线和电源线。这些电坳机的位置编码器相应的需要特殊的设计。编码器的空心轴内径为50mm。对于带摆动轴的机床旋转工作台轴，其轴径由0.5米到几米。

关键词：空心轴轴承角度编码器机床电动机

Additive BLISK Manufacture

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Additive BLISK Manufacture

第一届激光加工前沿国际会议

作者： Akad.Oberrat dr.-ing.ingomar Kelbassa Fraunhofer ILT AachenGermany

Currently,high-value class 1jet engine components such as BLISKs(BLade Integrated DiSKs)are conventionally manufactured by material removal of the forged raw material or Linear Friction Welding-LFW-of pre-milled BLISK blades onto the pre-turned *** used for the material removal are 5-axis milling(Milled From Solid-MFS)and Electro Chemical *** processes cause severe waste and material losses and are extremely time and cost intensive.E.g.,the 5-axis milling operation takes up to 100hours depending on the part dimension and geometry complexity of the BLISK and leads to material losses of up to 80%.Therefore,the Buy-to-Fly ratio is approximately 5:*** aim of the sub-project"Additive BLISK Manufacture"within the Fraunhofer Cluster of Innovation"TurPro"is the qualification and certification of Laser Metal Deposition-LMD-as an alternative"key enabler"for the"green manufacture"of new and future generation parts such as BLISKs made from Nickel and Titanium base *** presentation discusses the way from the first feasibility studies via the subsequent process development to a first additive BLISK-mock-up manufac-ture for a HPC BLISK made from In *** results are outstanding:Defects can be avoided *** achievable static and dynamic mechanical properties are comparable to a forged component and can be guaranteed by applying appro-priate temperature-time-cycles during LMD and by an appropriate Post Weld Heat Treatment-PWHT-in case of *** HCF tests will be completed within the first half of *** operating with Laser powers of up to 10kW a significant increase of the deposition rate of up to 9,000mm3/min has been *** deposition rate guarantees an additive manufacture of a single blade in less than *** the number of maximum 80blades per BLISK this leads to a calculated additive manufacturing time of approximately *** comparison to a conventional manufacture by 5-axis milling material

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打造全方位的安全

现代制造 2019年第3期 38-39页

作者： dr.-ing Lutz Janicke 不详

越来越多的企业致力于实现IT安全的构想。两大协会VDMA(德国机械制造协会)和ZVEI(电子技术工业中心协会)在众多行业内部进行的调查显示,目前执行率在中小型制造业还很低。据ZVEI/BSI研究表明,被调查的企业中仅仅只有15%的企业对其IT产... 详细信息

越来越多的企业致力于实现IT安全的构想。两大协会VDMA(德国机械制造协会)和ZVEI(电子技术工业中心协会)在众多行业内部进行的调查显示,目前执行率在中小型制造业还很低。据ZVEI/BSI研究表明,被调查的企业中仅仅只有15%的企业对其IT产品进行了风险分析。

关键词： IT安全电子技术机械制造风险分析 IT产品企业制造业中小型