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二硅化钼电热元件的安装 |
| 2011-3-27 |
| 1、垂直悬挂vertically hanging 二硅化钼电热元件常温卜脆性很大，高温时又有可塑性。所以Ｕ型元件的最好安装方法是垂直悬挂于炉顶上。这样安装的目的就是避免将机械应力加到元件发热端上。否则容易引起元件断裂。 Ｕnder normal temperature，MoSi，element is very brittleness，while under high temperature it is plasticity.So，the better way for installation if the UShape element is to hang it vertically，to the furnace top through the support clamping chuck H.The aim of such way is to avoid putting the mechanical stress directly to the element heat-generating end ，or the element will easily be broken. 2、支撑夹头support clamp 支撑夹头分别用于直径9/18mm和直径6/12mm两种元件。整个元件的重量都是由支撑夹头承担，元件的位置也由它决定。因此，必须仔细安装，保证元件垂直悬挂。为避免局部过热，元件下端圆锥部分一定要伸到炉膛内。 Support clamp are applied to &9/18 and &6/12 two kinds of elements respectively. the support clamp supports the whole weight of the element and the position of the element is also determined by it .therefore ，it must be installed carefully to assure that the element it veryically hung.in order to prevent the element from being over heated locally，the taper part of the element lower end must put into the furnace chamber. 3、导线夹头wire clip 接触硅化钼元件的导线采用铝编织线或多层铝箔。外面的钢板只起夹紧作用，不用来导电。直径6/12mm元件须用单排，而直径9/18mm元件采用双排。导线的末端与母线联结。为了避免应力传到元件上，导线应略大于元件和母线间的直线距离。 The wire connection clamp connecting MoSi2 element is made of aluminum woven wire or multilayer aluninum foil.the steel plate outside it only acts as a clamp and isn't used for electric conduction.For&6/12 element，single rowing wire is used ，and for &9/18element，double-rowing wire is used ，the end of the lead wire should be a little larger than the linear distance between the element and bus. 安装元件时夹头上的螺丝不要一 次拧的太紧，待元件升到高温时再次拧紧，因为这时元件有一定塑性不易折断。夹头部分温度一般不要高于200C.因此，夹头导线与元件接触电压应降低0.1V。为避免幅射热传到夹头，夹头下端和穿砖上面的距离不应小于50mm，为了避免损坏，一般直径6/12mm元件不能长期使用170A，直径9/18mm元件不能长期使用300A when the element is installed，the thread fixing the wire clip shouldn't be screwed too much at one time，it can be tightened when the element rises to high temperature，as the element has some plastic and isn't easily broken .the temperature of the wire clip generally shouldn't be higher than 200 C .therefor，the contact voltage between the clip wire and element should be lowered to 0.1V，in order to avoid that the radiation heat is conducted to the clip，the distance between the lower end of the clip and upper surface of the through brick should not less then 50mm.Generally to ^&6/12 element ，170A should not be used for a long time and for &9/18 element， 300A shouldn't be used. |
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