查询词典 insulator

The results show that the peak tension in the conductor of upper crossarm at suspension point exceeds the design value. Insulator rupture has no effect on tower component of upper crossarm, but it has significant influence on insulator tension of upper crossarm. The lower limit of longitudinal unbalanced tension of two and more than two bundle conductor is relatively small. Insulator rupture should be taken into account in the design for overhead transmission lines.

分析结果表明，上横担一组绝缘子破坏失效后，破坏档未破坏端导线的张力超过了技术规程中的设计值；导线的跌落对破坏档未破坏端的上横担绝缘子受力有较大的影响，而对上横担铁塔杆件没有明显的影响；考虑杆塔断线荷载时，应增大两分裂以上导线纵向不平衡张力的下限值；在架空送电线路的设计中应该考虑绝缘子断裂的荷载工况。

Using guyed tower middle line insulator string as an object, through analyzing of distance between cross arm and boom guy plumb plane, and projecting insulator string length, angle, conductor wind inclined angle, and sag to boom guy plumb plane, middle line insulator string tracking equations can be established.

以拉线塔中线绝缘子串为分析对象，通过对横担、拉线铅锤面间的距离分析，再将绝缘子的串长、角度，导线风偏角、弧垂投影至拉线铅锤面，在拉线铅锤面建立中线绝缘子串的轨迹方程，以带电体与拉线间的距离为限制条件，从不同角度计算出第1、2、3极限风偏角，取其中的最小值为极限风偏角。

Ten contamination features are extracted from the contaminated insulator infrared image,viz.the highest , the lowest , the mean temperature of the background, the temperature variance of the background ,the highest ,the lowest ,the mean temperature of the contaminated insulator discal surface , the temperature variance of the insulator discal surface ,the maximum and the mean temperature increase of the discal surface contrasting to the mean temperature of the background .

本文研究从分割后的污秽绝缘子盘面图像中提取了10维原始污秽特征，即：绝缘子红外热像背景的最高温度、最低温度、平均温度、背景温度分布的方差值、盘面图像的最高温度、最低温度、平均温度、盘面温度分布的方差值、盘面温度的最大温升、盘面温度的平均温升。

In order to understand the mechanism of pollution process around insulator under the wet condition better,based on the principle of computational fluid dynamics CFD, the numerical model,which was used to analyze three-dimensional two-phase uncompressible turbulent flow field around composite insulator in wet weather and convection-diffusion of dust particles,was established.Then,the dynamic simulation of the general approach,which was used to analyze solid dust particles' wet deposition process around composite insulator with application of CFD software-Fluent,was proposed.

为深入了解绝缘子外部在湿润条件下的积污机理，基于计算流体力学原理CFD建立了求解湿润气象条件下复合绝缘子外部三维两相粘性不可压缩湍流流场的基本控制方程组和尘埃颗粒对流扩散的基本方程，提出应用CFD软件Fluent可对复合绝缘子表面固体尘埃颗粒湿沉降过程进行动态模拟的一般方法。

Its main products cover more than 20 series and 200 kinds of products like all sorts of suspension insulator (including ANSI52),middle and high voltage needle insulator (including ANSI55、56) and porcelain insulator below 30 tons, and various kinds of support, sleeve, drop-type fused cutout, lighting conductor and disconnecting switch below 500 kilovolts. All these products with completed series are well sold in China mainland also furthers sold to Europe, America Southeast, Asia, Middle East, South America, Hong Kong and Macao.

现有主要产品：30吨以下各种悬式绝缘子（包括美标52系列），中、高压针式绝缘子（包括美标55、56系列），瓷横担绝缘子，500千伏以下各种支柱、套管、跌落式熔断器、避雷器及隔离开关电器等二十多个系列二百多个产品，品种系列齐全，产品畅销全国各地，远销欧美、东南亚、中东、南美及港澳地区。

By means of equalizing the histogram, the contrast of original thermal image is enhanced; then image region of the disc surface of insulator is intercepted manually; through the envelope of the smoothened histogram of thermal image the segmentation threshold is extracted and the morphological filtering is applied to the threshold- segmented binarized image to obtain insulator disc surface image and background image, and then 10 infrared image features of insulator disc surface image and background image, such as the highest temperature, the lowest temperature, mean temperature, variance of temperature distribution of both kinds of images, as well as maximum temperature rise and mean temperature rise of insulator disc surface relative to background, are extracted; finally, the good and bad features are discriminated by single factor variance analysis, thus the feature selection is implemented.

利用直方图均衡化增强原始热像图对比度，人工截取绝缘子盘面图像区域；通过平滑后的图像直方图包络线提取分割阈值，对阈值分割后的二值图像进行形态学滤波，得到绝缘子盘面图像和背景图像，提取2者的最高温度、最低温度、平均温度、温度分布方差以及盘面相对于背景的最大温升和平均温升共10个红外热像特征；应用单因素方差分析甄别特征优劣，实现特征选择。

Post porcelain insulator ; hollow porcelain insulator ; composite insulator ; pollution ; mechanical strength

支柱瓷绝缘子；空心瓷绝缘子；复合绝缘子；污秽；机械强度

The main products are disc suspension insulator, silicon rubber suspension insulator, solid-core station post insulator, silicon station post insulator, current transformer, porcelain and silicon rubber bushing and so on.

主要经营的产品有悬式瓷绝缘子，悬棒复合绝缘子，电站用支柱绝缘子，复合电站用支柱绝缘子，干式、充油、充气电流互感器，干式、瓷、复合穿墙套管。

Research results show that under AC voltage the voltage distribution of Y-type insulator strings is extremely non-uniform and the voltage distribution curve of Y-type insulator string is similar to that of I-Type suspension insulator string; under DC voltage the voltage distribution of Y-type insulator string is also extremely non-uniform, the voltage undertaken by the insulators at the conductor side of Y-type insulator string is higher than that undertaken by other insulators of the same string, and as a whole the voltage distribution trend is that the voltage undertaken by the insulators at both ends of the Y-type insulator string is higher than the voltage undertaken by the insulators at the middle of the same insulator string.

研究结果表明：在交流电压下，Y型绝缘子串的电压分布极不均匀，其电压分布曲线和交流悬垂I串类似；在直流电压下，Y型绝缘子串的电压分布极不均匀，绝缘子串导线侧绝缘子分担电压高于其它绝缘子，总体上呈现导线侧和杆塔侧两端高、中间低的分布趋势。

It is pointed out that the core brittle fracture is caused by extremely uneven voltage distribution along the insulator string and irregular designing and mounting of grading ring which leads to deformation of electric field on conductor end of insulator.It is proposed to replace the suspension clamp by a "八"shape joint strap and installing a glass insulator at this space or introducing a special composite insulator-gla...

通过对原线路双联悬垂复合绝缘子下垂式线夹挂点进行&八&字形改造；利用下垂式线夹缩短的距离在导线侧增挂玻璃绝缘子；新建线路采用特制复合绝缘子与玻璃绝缘子组合方式，使复合绝缘子均压环，接头连接处远离高压端，改善了复合绝缘子的电场分布，降低了复合绝缘子导线端承受的电压，消除了畸变电场，避免了棒形悬式复合绝缘子芯棒脆断，取得了良好的效果。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。