矢量控制异步电机转子时间常数辨识研究

针对转子磁场定向异步电机矢量控制系统中转子时间常数易受温度和磁饱和影响而偏离其最初值,从而导致磁场定向失败,电机动静态特性变坏的现象,提出了一种基于静止坐标系下电机模型的转子时间常数辨识方法。它只用到电机的可测量变量,实现简单。仿真结果证明该算法是有效可行的。     

峡江水电站第9号发电机转子绝缘过低分析及处理

针对峡江水电站第9号机组并网发电前,转子绝缘一直偏低的问题,从设计制造、安装工艺、测量方式等方面进行了研究分析,采用外热源烘干加热、投入机组加热器、开机至空转、短路升流干燥转子、改变测量接线方式等办法,彻底排查出转子绝缘不合格的根本原因,并实施措施进行改进。     

旋翼复合材料桨叶参数化及有限元建模

直升机旋翼桨叶结构建模通常只考虑内部结构的几何特征,在进行优化设计时,没有考虑设计参数对初始静强度设计的影响,为优化设计,提出采用有限元离散方法,面向多数直升机采用的C型梁结构,将桨叶内部结构分为带设计控制点的三大类构型模块,建立了在设计过程中能够保证桨叶大梁设计强度不变的参数化模型,并有针对性的提出背景网格与层结构网格结合的快速有限元离散方法,生成高效的旋翼复合材料桨叶剖面参数化有限元模型.通过对“海豚”直升机桨叶剖面建模,验证参数化建模方法的可靠性和有效性.     

汽轮机转子中心孔涡流探伤

通过制作人工试样模拟中心孔的常见缺陷，对汽轮机转子中心孔缺陷程度和涡流信号响应特征之间的关系进行了定性分析和研究，为汽轮机大轴中心孔的涡流探伤提供了一种确定可行的方法。     

转子加套修复的理论与实践

介绍了气压机转子磨损后的两次修复和处理过程,同时对故障原因和修复方案进行了必要的分析和计算,并说明了最终修复成功的意义.     

转杯纺纺制竹节纱的工艺研究

在改变喂给罗拉速度纺制竹节 的条件下，对转杯纺纺制竹节纱的基本工艺参数进行了理论研究，得到了关于粗节倍数和竹节长度的模型，并通过实验测试验证了理论的正确性，也证明了彩和改变喂给罗拉速度纺制竹节纱的可行性。     

Effect of the rotor shape on the mixing characteristics of a continuous flow Taylor-vortex reactor

Macro- and micromixing in a continuous flow Taylor-vortex reactor with novel ribbed rotors were investigated and compared to the features of a classical cylindrical rotor. The characterisation was performed in a wide hydrodynamic range (40<Ta<2500 and 0.03<Re<0.51) through tracer experiments and the analysis of the rotor power consumption. Additionally, the flow patterns were visualised by using a rheoscopic fluid. The results show that the novel rotors equipped with ribs immobilise and stabilise the vortices. As compared to cylindrical rotors, micromixing is clearly enhanced while axial dispersion can be simultaneously reduced. Through the use of ribbed rotors, the operational window can be broadened considerably, in which the reactor runs at very low or moderate extent of macromixing.     

各种形状的两叶圆弧型转子罗茨鼓风机的比较

罗茨鼓风机圆弧型转子有三种不同的型线组合。本文给出两叶罗茨鼓风机这三种不同的圆弧型转子型线的设计方程，并指出它们的优缺点及应用范围。     

漫湾水轮发电机转子磁极键装配出现的问题

本文针对漫湾水电站机组安装中，由于国家规范和厂家规程要求不明确，出现的对转子磁极键装配的不同认识和不合理施工方法，通过对机组各种状态下受力状况进行计算、分析，论述水轮发电机转子磁极键的装配要求及改进意见。     

Self-organizing maps for surveying lubrication within squeeze film dampers

Self-organizing maps (SOMs) represent a well-known neural network technique particularly suited to classification tasks. Here, it is adopted to monitor the lubricating conditions within squeeze film dampers for rotor support and was aimed, in particular, at identifying the aspect of the pressure waves within the oil film. Pressure distribution is indeed significantly influenced by a number of factors, which affect damper operation. Results from past research in the field make it possible to infer that the pattern of pressure signals taken in the oil film represents a valuable source of information as regards the lubricating conditions within the damper. Surveillance procedures in the operation of turbomachinery could benefit from prompt detection of possible, unwanted changes in the characteristics of lubrication, for example, when modeling bearing operations within model-based schemes. In this paper, SOM capabilities are first evaluated, dealing separately with theoretically simulated data. The subsequent tests adopted theoretical data as a reference for identifying experimental conditions. Further tests were carried out to map experimental data. Despite constraints consisting in the damper motion being imposed during the theoretical and experimental tests, the results confirmed the potential of the method and encourage further tests in conditions which are closer to real operation.