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对装配在梳形磁极结构的磁极线圈损坏的修复,是一项非常繁杂耗时的工作。这是由于磁极结构及其装配工艺的复杂性所致。本文说述了花山电站SF800-8/2600三号发电机组磁极线圈引线根部烧断的修复过程及方法。该方法可不用装拆工具,在不拆装磁极及线圈的情况下,化繁为简地对损坏的引线进行更换。 相似文献
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本文介绍了大型水轮发电机端部环形引线电流和损耗的场路耦合有限元数值分析方法,并针对三峡地下厂房水轮发电机的汇流环形引线电流、损耗分布进行了具体的分析计算,建立了单位长度汇流环形引线(1:1)通风、温升模型试验台,开展并完成了相应的通风、温升试验研究。 相似文献
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通过强化生产现场的工艺管理,特别是加强铁心、绝缘件、线圈和引线装配、总装等的制造工艺,大型变压器的局放量有了明显的降低、产品质量进一步提高。 相似文献
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正在研究的激光定位吊装结构工作台系统是电子束曝光要贩主要组成部分。本文概述了工作台吊装结构的特点,用有限法元建立了吊装结构的三维实体力学模型,在理论上对其进行了静态特性的分析与计算,并用激光散斑法进行了实验验证,设计了工作装配与调试的工艺支。理论计算和实验分析充分证明工作台吊装结构能够满足电子束曝光机工作台亚微米定位精度的要求,具有独特的优越性。 相似文献
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从安装工艺、电机的运行环境、上一次检修测量数据和本次送电前的运行方式等方面对真空泵电机跳闸故障进行了原因分析,认为转子动平衡块装配质量差是导致电机故障跳闸的主要原因,而电机引线容量小是电机运行中的一个重大隐患,提出更换全部动平衡块,并加大引线载流量处理故障. 相似文献
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从安装工艺、电机的运行环境、上一次检修测量数据和本次送电前的运行方式等方面对真空泵电机跳闸故障进行了原因分析,认为转子动平衡块装配质量差是导致电机故障跳闸的主要原因,而电机引线容量小是电机运行中的一个重大隐患,提出更换全部动平衡块,并加大引线载流量处理故障. 相似文献
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本文描述了一套轴向和径向大容差板对板浮动连接器与PCB组件的整体仿真设计及应用方式。通过三维电磁场仿真,确定连接器内部尺寸和PCB Layout形状和尺寸,达到整体射频性能要求。 相似文献
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根据GW4隔离开关触指的特点,引用钳子的力学理念,研制出新型触指拆装专用工具。本文分析了GW4刀闸触指目前的检修现状,对新型触指拆装工具进行详细介绍及力学分析,通过现场效果对比,证实了此研制工具满足现场生产需要、提高了工作效率,值得在生产中推广。 相似文献
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针对原吊具存在的绕组与机座中心线易偏斜,加压后绕组绝缘易破坏,甚至使机座撑裂、失去防爆性能的缺点,介绍了一种用于中型防爆电机带绕组定子铁心内撑式吊具,有效地克服了轴线不易对中、键槽不易对正的缺陷.同时对吊具进行了计算及受力校验,并对设计原理及注意事项进行了叙述. 相似文献
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同轴电缆组件与同轴连接器回波性能的改善 总被引:1,自引:0,他引:1
通过对电缆组件进行时域分析(TDR),得出了同轴连接器内部的阻抗匹配不一致,导致电缆组件回波值偏高。采用CST一边进行模拟分析连接器内部的结构,一边修改连接器各结构以降低电压驻波比。试验采用改进的连接器组装同轴电缆组件,采用网络分析仪测试,电压驻波比均能满足预定的要求。因此,改进连接器内部各结构,调整内外径比例,对同轴电缆组件的VSWR性能的改善有直接的影响。 相似文献
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The RG220/U cable connector has been used very successfully for 20 years under difficult conditions. Its design principle can be applied to a wide variety of other cable types and voltages. The principle of the tool for machining the cable can be adapted to many different cable types. The main manufacturing difficulty is the execution of the finger contacts to tight tolerances. These contacts must be handled with care and checked individually before assembly. The radiation resistance of ScotchcastR 815 is better compared to polyethylene and therefore does not limit the use of this connector design. Finally, the design was successfully adapted to mass production and the price can be compared favorably with a commercial 30 kV connector. For the Large Hadron Collider, two large injection systems and two extraction systems are under construction requiring more than 800 coaxial high-voltage connectors. In view of our very positive experience and the excellent long-term behavior, we conclude that the design of these connectors is also perfectly adapted for the new project 相似文献
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采用零磁通电流互感器实现了电流隔离型三相多表位电能表检定装置.它可在不断开电能表电压、电流连接片情况下实现对多块电能表的检定. 相似文献
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Sixteen different commercial bolted connectors for 50 and 240 mm stranded aluminum cable conductors have been examined in order to identify and clarify the correlations between the quality of a connector and its design characteristics, material usage, assembly procedures, bolt numbers and configurations and other relevant parameters. The quality is assessed with basis in resistance measurements after short circuit testing and during thermal cycling as specified by the IEC 61238-1 standard. The tightening torque of the bolts was measured during connector assembly, and the resulting axial compressive forces were calculated. A very strong correlation is observed between this compressive force and the connector quality; large forces give connections with low and stables resistances. The various other design parameters considered are found to have significantly less or in some cases hardly any notable influence on the electrical test results. 相似文献
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A brief set of fiber optic connector tests has been performed. This evaluation of connectors is only intended to cover some areas which the authors feel are not adequately covered by tests performed by the manufacturers. The relative costs of the connectors are not considered. Tests included repeatability, thread rotation, transverse stress on the connector assembly, connector tension, vibration, temperature cycling, and bulkhead contamination. Results of the tests are analyzed, and an overall rating is given to the connectors based on these tests 相似文献