SIEMENS自动化系统应用于污水泵站的监控网络

随着城市建设的迅速发展,市政污水泵站的数量和规模也在不断地增加。通过构建城市污水泵站监控网络,实现整个过程无人自动化已迫在眉睫。本文结合SIEMENS自动化系统讨论了污水泵站的监控网络的设计构思及实现。本系统结构简单、操作方便、运行可靠,满足生产中对各种工艺参数的要求。     

离心泵运转工况的调节

对比分析离心泵运转工况调节的几种方法之优缺点，介绍在实际工作中的应用。     

蒸发器母液循环泵、过料泵泵壳泄漏分析及对策

介绍我公司氧化铝厂KESTNER蒸发器母液循环泵、过料泵泵壳的泄漏情况 ,分析泄漏原因 ,提出相应的改进措施     

330MW汽轮机组给水泵出力不足的热力性能分析

对某电站330MW汽轮机组水泵出力不足的问题，通过热力性能试验及系统分析，认为影响汽轮机汽动给水泵组出力不足的原因是小汽轮机轴功率输出不够，建议降低小汽轮机排汽压力，改造小汽轮机通流部分，以提高小汽轮机的输出轴功率。     

回转体零件CAPP专家系统的设计与实现

利用VisualBasic可视化编程技术建立了回转体零件工艺规程设计专家系统HCAPPEXPS ,经检验 ,系统运行稳定可靠 ,知识库维护扩充方便 ,操作界面友好 ,可满足一般回转体零件工艺规程设计自动化的要求     

罗茨真空泵转子系统动力学建模

由于内部激励和外部扰动的存在,罗茨真空泵在工作过程中会产生很大的振动问题。为了更好地对罗茨真空泵转子系统进行动力学分析,采用集中质量法,考虑电机、齿轮、罗茨转子等结构的基础上对系统进行动力学建模。采用牛顿欧拉法分别建立了转子系统的纯扭转模型以及偏心弯扭耦合模型的振动微分方程并考虑了重力的影响。研究发现由于齿轮啮合时变刚度的存在,转子系统存在稳定性问题。同时由于偏心的存在,转子的弯曲振动和扭转振动存在相互耦合。研究内容为之后对系统的稳定性分析以及弯扭耦合振动分析奠定了基础。     

回转窑新型支承结构的力学性能分析及设计

这里针对回转窑筒体在运转时发生持续下滑,,引起系统频发故障,造成停机的问题,分析论证了窑体下滑力产生的根本原因及消除方法;在理论分析的基础上,设计了消除下滑力的新型支承结构,给出了结构参数的计算方法以及不同斜度回转窑的设计参数值;探讨了新型结构设计应用中的关键问题。     

步进电机驱动的实现方法

随着工业自动化的发展，步进电机的应用越来越广泛，步进电机是一种用于开环控制的驱动元件。阐述了步进电机的工作原理和特性，提出了基于单片机控制的步进电机驱动实现方法及软硬件设计方法。     

Development of a mechanical rock breakage experimental platform

With social and economic development and improvement of science and technology, tunnel boring machines, raise boring machines, reaming machines and road headers have been unprecedentedly applied to underground engineering construction. Mechanical rock breakage experiments became an indispensable mean for mechanical excavation of underground engineering. It can also guide the design and operation of excavation machines. This paper introduces the new mechanical rock breakage experimental platform developed by Beijing University of Technology. The design and manufacture of this platform considered the influence of high in situ stress, cutter head rotation and rock breakage by multi-cutters at the same time on the rock breakage process. Different tools, such as rolling cutters, scraper, ripper, and pick, for different excavation machines can be tested in the platform. It can also take into account the different rock mass structure in the sample box. Different construction conditions with different cutting tools can be realistically modeled. The experimental platform consists of a mechanical system, a hydraulic system, an automatic control system and a data acquisition system. After installation of the designed experimental platform, several tests with different construction conditions were conducted. The experimental results showed that the platform reached its design requirements.     

Metal forming and forging – finding a new place within high value manufacturing through advanced,industrial scale research

Abstract

Since the banking crisis governments have placed renewed emphasis on the importance of manufacturing in providing the basis for a balanced economy. The term High Value Manufacturing (HVM) has been used in the UK to describe manufacturing based industries with a high R&D content and therefore which in turn will support knowledge based job creation into the future. The UK Government has supported the development of a network of manufacturing research centres aimed at providing a step change in research and development activity and impact termed the HVM Catapult. The Advanced Forming Research Centre (AFRC) within the University of Strathclyde is a founder member of the HVM Catapult, with a focus on metal forming and forging technologies.

To outsiders however, forming and forging are established technologies employed within traditional, and in many cases declining, manufacturing environments whose roots can be traced back to the industrial revolution and beyond. It is not surprising, therefore, that the position of metal deformation technologies within the HVM taxonomy is sometimes questioned. This paper aims to address the common arguments which are used to question the position of metal forming and forging within HVM at a general level, and through examples of ongoing work themes with the AFRC.