共查询到19条相似文献,搜索用时 156 毫秒
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6MVA电炉铜管短网与铜排短网的 比较及改进措施 总被引:1,自引:1,他引:0
通过对6MVA电炉铜管短网与铜排短网运行情况的比较,发现铜管短网的电压降明显高于铜排短网,效率低于铜排短网。对二进行了仔细分析,从而得出将铜管短网的铜管规格由50/30mm改为70/50mm后,其各项指标将优于铜排短网。 相似文献
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北满特钢40t钢包精炼炉(LF)短网设计与实践 总被引:1,自引:0,他引:1
电弧炉短网的结构直接关系到电能消耗 ,虽然一般短网阻抗都为毫欧级 ,但在上万安培冶炼电流下 ,炉外有功损耗和无功损失却相当可观。而且三相电极功率的不平衡将直接影响冶炼效率并加重电极和炉衬的偏蚀性消耗 ,影响包龄和吨钢成本。本文提出一种总体阻抗优化的短网设计思想 ,结合 40tLF改造的具体工艺条件 ,对实现短网的最优结构作简要介绍。1 现有的短网设计思想为克服三相不平衡所造成的诸多问题 ,目前的短网设计均以获得三相阻抗相对平衡为设计原则 ,并以导电横臂、电缆和铜排三段阻抗分别取得相对平衡来实现短网总体的平衡。流行的… 相似文献
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对传统的矿热炉短网铜排电能损耗及降耗情况进行分析,并对改前后分别进行推导计算和比较,找出造成短网铜排损耗的原因,并提出了改进措施。 相似文献
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短网是指电炉变压器二次出线端到电极的一段电路,其中包括组合母线束、软电缆、导电铜管,电极把持器及电极。其特点是:长度短、电流大,外形轮廊复杂和工作环境差。如设计安装不当,阻抗过大,将产生较大的损耗,且由于阻抗压降的影响,使输入炉内的功率降低,延长冶炼时间,钢水电耗增加。短网要求长度最短,各相回路的电抗和电阻相等,相回路所占面积最小,导体相互 相似文献
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以往国内铁合金电炉的短网绝大多数的开口型炉子均采用铜排短网。建造一座中、大型电炉需要大量的铜,例如一座12500千伏安的铁合金电炉短网约需铜排7~8吨。铜是战备的重要物资,如何以铝代铜,节约用铜是一个值得十分重视的问题。 相似文献
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谢文远 《有色金属材料与工程》2005,26(2):70-72
比较了生产紫铜母线的两种传统工艺——铸轧法和挤压法;分析了紫铜母线折弯开裂的原因是由晶粒粗大引起的;讨论了细化晶粒的几种方法:退火、添加晶粒细化剂和激冷。最后指出:调整紫铜母线的配料比例、控制挤压温度和挤压速度,能改善紫铜母线的力学性能,提高产品的成品率。 相似文献
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通过测量铝电解槽阳极电流产生的磁场来反映电流,并且使用屏蔽磁环屏蔽掉邻近的阳极、立柱母线、水平母线和跨接母线产生的干扰磁场。最后通过试验和COMSOL仿真,验证屏蔽磁环的可行性,实现电流分布连续监测。该测量方法简单,测量结果精确。 相似文献
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S. Muthukumaran S. Senthil Kumaran Saket Kumar 《Transactions of the Indian Institute of Metals》2011,64(3):255-260
In the present study, friction welding of tube to tube plate using an external tool (FWTPET) was used to weld copper tubes
with aluminum plates. Tubes were prepared with holes along the faying surfaces of tubes and cleaned before welding. The weld
microstructure shows line of stir zone (SZ), a narrow thermo mechanically affected zone and heat affected zone (HAZ). The
welded samples were found to have satisfactory joint strength and the XRD study showed the presence of AlCu intermetallic
in the weld zone. The hardness survey revealed that there was a slight increase in hardness adjacent to the weld interface
due to grain refinement. Better weld joints were achieved when the tool rotation speed and interference are 1500 rpm and 0.8
mm respectively. The present study confirms that a high quality copper tube to aluminium tube plate joint can be achieved
by FWPET process. 相似文献
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C. Maxwell Rejil S. Muthukumaran C. Sharan S. P. Gill H. B. Dong 《Transactions of the Indian Institute of Metals》2017,70(3):691-701
Joining of titanium and stainless steel is challenging due to the formation of hard, brittle intermetallics. This study focuses on engineering ductile materials for joining transition metals. Friction welding of tube to tube-plate by an external tool, a novel solid state welding process was employed to join titanium tube and stainless steel tube plate. The interlayers engineered were copper, silver and Cu–Zn alloy. The micrographs revealed phase transformations in titanium tube and unaffected stainless steel base. Interface peak microhardness of 458 HV was observed for Ti/Cu–Zn/SS welded sample. The intermetallics formed were characterized by X-ray diffraction and scanning electron microscopy with energy dispersive spectroscopy. A novel shear test procedure was developed to evaluate the maximum shear load. It was found that joints with silver as interlayer withstood the maximum shear load of 56 kN. The shear surfaces were further analyzed and investigated for fracture study. 相似文献
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铜管-管壳式换热器的设计 总被引:1,自引:0,他引:1
从铜管-管壳式换热器中铜管与管板连接时的受力情况同钢制管壳式换热器中钢管与管板连接时的受力情况的。区别及钢管-管壳式换热器的特点出发。提出铜管-管壳式换热器的设计方法。 相似文献
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分析四端进电160kA预焙槽母线结构特点,结合平果铝一期电解系列母线预通电接点压降测试的实际,提出处理接点施工质量、降低电压以及改进联接方式(加焊板)的方法。 相似文献