用Visual Basic6．0开发电机转轴设计辅助程序

介绍电机设计时转轴的挠度及临界转速的计算方法及结果,并以Visual Basic6．0为平台开发了转轴设计CAD程序,介绍在VB环境下开发转轴设计CAD程序所需要的VB控件、窗口界面设计等编程技术。     

Matlab语言在电机转轴设计中的应用

本文介绍了把Matlab语言用于电机转轴设计中，校核转轴挠度和临界转速的程序，并用实例说明了该程序的使用方法。     

YZR2系列电机转轴机械计算

介绍YZR2系列起重及冶金用电动机设计时转轴机械计算的依据与计算程序及结果，给出作为特例的焊幅铁转轴刚度计算方法。     

计算电机转轴挠度的通用程序

本文导出了计算电机转轴挠度的通用计算公式,并给出了相应的BASIC程序。实例证明这种新方法是行之有效的。     

高速异步电动机转轴的疲劳特性分析

基于Ansys多物理场仿真软件平台,对高速异步电动机的转轴进行疲劳特性分析,校核高速异步电动机转轴的疲劳强度和高速运行的可靠性,预测电机转轴的寿命;分析电磁力对转轴疲劳寿命的影响,判断疲劳特性的类型。对比分析作用于电机结构的电磁力波频率、幅值和电机转轴各阶模态的固有频率,校核电机转轴的强度。在转轴不会因电磁振动发生断裂的前提下,将电磁力等效为静应力分析转轴的疲劳特性,校核电机轴在电机寿命周期内是否会发生短周疲劳损坏;并采用凹圆角设计进一步提高转轴的结构可靠性,提高电机的转轴寿命。     

基于Ansys的永磁同步电机转轴的仿真分析

以一款永磁电机带阶梯状的转轴作为分析对象,对电机转轴进行仿真分析及其实验验证。以模态分析和谐响应分析理论为基础,利用Ansys首先分析了转轴的低阶模态,然后对转轴创建谐响应分析并进行求解,得出了转轴的最大位移频响函数曲线、整体变形以及等效应力云图,从而求解出电机转轴在低阶固有频率下必须避开的运行状态,以及转轴需要优化结构尺寸和刚度的部位。对电动机转轴的生产设计及其优化都有一定的指导意义。     

防爆电机转轴机械计算和计算机实现

防爆电机轴的机械计算是电机设计的重要组成部分.给出了转轴的刚度、临界转速校核方法;滚动轴承的寿命验算和轴伸强度校核的基本计算方法,并使用Visual Foxpro语言编辑电机轴的机械校核程序.此方法高效、精确,既满足了电机可靠运行的需要,又极大的缩短了设计周期,成为电机设计必备的程序之一.     

电动机常见机械故障的检修

一、转轴的修理 转轴故障包括：键槽损伤、轴颈磨损、转轴弯曲、转轴断裂等。     

中型高速电机柔性轴动力特性的计算

针对已往采用经验公式计算中型高速柔性轴异步电机的转轴临界转速所存在的问题,研究了磁拉力和滑动轴承对柔性轴电机转轴的临界转速和动态响应的影响,特别指出磁拉力对转轴的挠度的影响是复杂的。在此基础上,提出了柔性轴电机转轴动力特性的数值计算方法。为中型高速柔性轴电机的转轴设计提供了依据。     

用有限元法确定汽轮发电机护环的合理结构

本文针对东德50MW汽轮发电机护环改装的需要,编制了考虑护环与转轴的紧配合和离心力的空间轴对称有限元护环计算程序,得到了护环各点较全面的应力分布情况,以及削角、开槽、紧配、超速等因素的影响情况,供护环改装参考。计算程序也可供其他护环的设计和结构改进使用。     

小功率金卤灯再启动特性机理的探讨

利用专门设计的金卤灯再启动特性测试仪记录了金卤灯再启动特性的若干典型曲线，对某些异常特性的发生机理进行了分析，找到了它们与金卤灯内在质量的联系，研究表明通过测量金卤灯的再启动特性可以方便地诊断金卤灯的内在质量。     

一种考虑了负荷特性的企业电网潮流算法

大型企业电网的负荷特性主要表现为感应电动机群特性,为了改进现在常用的电力系统潮流算法中用恒功率模型来表征节点负荷,不能满足工程精度要求的问题,提出了在对企业电网负荷节点电动机群进行等效变换后,引入负荷特性的潮流计算的思路,在此基础上进行了理论推导,并经过现场实测数据,进行了仿真。仿真结果表明,负荷特性的潮流计算方法符合企业工程精度要求,可以达到提升业电网潮流计算结果在精确度、实用度等方面的要求,具有一定的理论和工程意义。     

加快黄河北干流梯级开发的思考

根据规划在黄河北干流上布置万家寨、龙口、天桥、碛口、古贤、甘泽坡6座水利枢纽工程。北干梯级开发可有效控制和管理黄河的水沙关系、洪水;改善生态环境,使水资源得到合理利用;向华北电网提供大量电力,对秦晋2省工农业、通航和旅游等具有促进作用,并带动地方经济的发展。     

Estimation of Efficiency of the Cooling Channel of the Nozzle Blade of Gas-Turbine Engines

The main direction of improvement of gas-turbine plants (GTP) and gas-turbine engines (GTE) is increasing the gas temperature at the turbine inlet. For the solution of this problem, promising systems of intensification of heat exchange in cooled turbine blades are developed. With this purpose, studies of the efficiency of the cooling channel of the nozzle blade in the basic modification and of the channel after constructive measures for improvement of the cooling system by the method of calorimetry in a liquid-metal thermostat were conducted. The combined system of heat-exchange intensification with the complicated scheme of branched channels is developed; it consists of a vortex matrix and three rows of inclined intermittent trip strips. The maximum value of hydraulic resistance ξ is observed at the first row of the trip strips, which is connected with the effect of dynamic impact of airflow on the channel walls, its turbulence, and rotation by 117° at the inlet to the channels formed by the trip strips. These factors explain the high value of hydraulic resistance equal to 3.7–3.4 for the first row of the trip strips. The obtained effect was also confirmed by the results of thermal tests, i.e., the unevenness of heat transfer on the back and on the trough of the blade is observed at the first row of the trip strips, which amounts 8–12%. This unevenness has a fading character; at the second row of the trip strips, it amounts to 3–7%, and it is almost absent at the third row. At the area of vortex matrix, the intensity of heat exchange on the blade back is higher as compared to the trough, which is explained by the different height of the matrix ribs on its opposite sides. The design changes in the nozzle blade of basic modification made it possible to increase the intensity of heat exchange by 20–50% in the area of the vortex matrix and by 15–30% on the section of inclined intermittent trip strips. As a result of research, new criteria dependences for the complicated systems of heat exchange intensification were obtained. The design of nozzle blades can be used when developing the promising high-temperature gas turbines.     

The degree of intelligence of the law of Biot-Savart

The author shows that the law of Biot-Savart is capable of giving the magnetic flux density due to DC currents in complete circuits or segments of circuits. The charge accumulations at the ends of such segments are automatically accounted for in this law. In such cases, the law of Biot-Savart is equivalent to the complete form of Maxwell's equation with the displacement current included. It is concluded that the law of Biot-Savart is more generation and contains more information than is generally assumed     

铅酸蓄电池板栅浇铸缺陷分析

铅酸蓄电池板栅浇铸过程中出现的缺陷通常分为宏观缺陷和微观缺陷两大类。本文通过宏观和微观分析的方法,结合板栅的实际情况,对Pb-Ca-Sn-Al四元合金板栅浇铸过程中产生的缺陷进行了介绍和分析。     

Some aspects of technology of use of electrical objects on the basis of methods of short-term forecasting of technical condition

Some aspects of the technology of using electrical equipment on the basis of statistical (stochastic) methods for short-term forecasting are considered. The experimental (calculating) part includes construction and testing of specific forecasting models in order to ground their further application.     

压实度标准制定的合理性

通过土料干湿法对比试验和环刀取土尺寸效应对比试验, 探讨了影响分层碾压土基垫层 压实度的主要因素, 指出通过击实试验制定土基压实度标准和施工质量检验时应注意的问题, 以及如何确保压实度标准制定的合理性和现场检验的客观性。     

凝汽器热水井冲击振动的综合治理实践

给出了凝汽器热水井冲击振动发生的部位及具体原因。结合机组的实际情况,实施了优化运行、设备治理及系统改造等综合治理措施。     

冲渣水回收循环使用效果显著

通过对高井热电厂除渣水系统循环使用存在问题的分析,提出了脱水仓设备的改进措施,从而提高除渣水系统循环运行可靠性,减少耗水量,降低了我厂的生产成本。