链形悬挂
catenary suspension
学习目标：
i wanted youlearning objectives
1.掌握链形悬挂根据接触线和承力索在空间的位置关系的分类；
冬天穿衣打扮图片Master the classification of catenary suspension according to different positions of mesnger wire and contact wire in linear ction;
2.掌握接触网悬挂根据下锚类型的分类。
Master the classification of overhead contact line system suspension according to the design of the tensioning system ud.
链形悬挂是有一根或多根接触线通过吊弦悬吊于承力索上
deem的接触悬挂形式，承力索通过钩头鞍子、承力索座或悬吊滑轮等悬挂在支持装置的腕臂上。主要由承力
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索、接触线、吊弦及悬挂零件等组成。链形悬挂是一种运行性能较好的悬挂形式。它的结构特点是接触线通过吊弦悬挂在承力索上，使接触线在不增加支柱的情况下增加了悬挂点，通过调节吊弦长度使接触线在整个跨距中对轨面的高度根本保持一致。减小了接触线在跨中的弛度，改善了接触线弹性，增加了接触悬挂的重量，提高了稳定性。可满足电力机车高速运行时取流的要求。
Catenary suspension is a suspension arrangement in which one or more contact lines are suspended on mesnger wire by droppers.The catenary wire is suspended on the cantilever which is one part of the support device by hook end clamp, catenary wire support clamp or suspension pulley.It mainly compod of catenary wire, contact line, dropper and hanging parts. Catenary suspension is a kind of suspension arrangement with better interaction performance.Its structural characteristics are that contact wire is suspended on the catenary wire by droppers，so that the contact line increas the suspension point without increasing poles. By adjusting the length of droppers, the contact line basically keeps the same height to the rail plane in the whole span.It reduces sag of contact line in the span, improves elasticity of the contact line, increas the weight of the overhead contact line/catenary suspension and improves the stability.It can meet the demand of electricity getting when electric locomotive runs at high speed.
1.链形悬挂按照悬挂链数的分类
Catenary suspension is classified according to the number of suspension.
链形悬挂分类方法较多，按悬挂链数的多少可分为单链形、双链形〔又称复链形〕和多链形〔又称三链形〕。目前我国主要采用单链形悬挂。
2011四级成绩查询There are many classification methods for catenary suspension, according to the number of suspension,it can be divided into single catenary suspension, double catenary suspension(also known as compound catenary suspension) and multi- catenary suspension (also known as three catenary suspension). At prent, single catenary suspension is mainly ud in our country.
单链形根据悬挂点处吊弦的形式不同分为简单链形悬挂和弹性
链形悬挂两种。图1—1所示为简单链形悬挂。弹性链形悬挂是在悬挂点两侧的主承力索上固定一段连续辅助绳(或称弹性吊索)，此辅助绳通过一根或多根吊弦悬吊接触线的链形悬挂。弹性吊索长度15m左右，安装时，辅助绳两端分别固定在承力索上，吊弦上端用U型线夹同辅助绳连接，下端与接触线定位器相连，当温度变化时，可防止短吊弦产生过大偏斜。
Single catenary suspension is divided into two types,simple catenary suspension and simple catenary suspension with stitch wire according to the form of droppers at support point.Figure 1-1 shows a simple catenary suspension.simple catenary suspension with
stitch wire is to fix a continuous auxiliary rope (or stitch wire) on the main cable on both sides of the catenary wire，the auxiliary rope is ud to suspended contact lines by one or more dropper s.The length of stitch wire is about 15m.During installation, both ends of the auxiliary rope are fixed on the catenary wire,The upper end of dropper is connected with auxiliary rope by a U-shaped sliding clamp,and the lower end of dropper is connected with contact line to avoid excessive deflection of the short dropper when the temperature changes.white christmas
regardlessof图1—1 简单链型悬挂
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Figure 1-1 Simple catenary suspension 如图1-2所示，弹性吊弦的作用是增加支柱处接触线固定点〔又称定位点〕的弹性，使一个跨距内接触线弹性均匀，有利于机车受电弓取流。
芦荟的英文Figure 1-2 shows it.The function of elastic dropper is to increa the elasticity of the fixed point of the contact line (also known as suspension point) at the pole, so that the elasticity of contact wire within a span is uniform, which is better for electricity getting by the locomotive pantograph.
简单链形悬挂结构简单，造价较廉价，运行、检修经验丰富。弹性链形悬挂和简单链形悬挂相比，有更好的弹性均匀性，但接触悬挂的施工检调比简单链形悬挂复杂。两者都能够适应高速电气化铁路的受流要求。目前，在设计时速小于2021m的电气化铁路中，简单链形悬挂是电气化铁路使用的主要悬yingyuyinbiao
挂类型，得到广泛应用。在高速电气化铁路中，简单链形悬挂适用于单弓取流、跨距缩小、接触线张力加大的接触网系统，比方设计时速350km 的京津城际高速铁路就采用了简单链形悬挂形式。弹性链形悬挂适用于双弓或多弓的高速取流，应使弹性不均匀度尽可能低，目前，弹性链形悬挂型式是高速铁路接触悬挂的主要形式，京沪、武广、石武、郑西等正线都采用了这种形式。
For simple catenary suspension,its structure is simple, cost is cheaper, operation and maintenance experience is rich.Compared with simple catenary suspension,simple catenary suspension with stitch wire has better elastic uniformity, but its construction and inspection is more complicated than that of simple catenary suspension.Both of them can be adapted to requirements of getting electricity for high-speed electrified railway.At prent, the simple catenary suspension is main types ud in Chine electrified railway, which is widely ud in the design of electrified railway with speed less than 2021m
