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主电弧
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  main arc
     With new wave form of the main current, the pilot arc can be turned off after the main arc is ignited, so the arc interference is avoided and double arc will not happen.
     通过改善变极性电流的波形可以达到在焊接过程中引燃主电弧后,关断维弧,彻底解决主、维弧相干涉的问题。
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  “主电弧”译为未确定词的双语例句
     Moreover, the developing time and velocity of partial arc in the same phase are different for various types of insulators, as will as the same insulator in different phases.
     ③染污绝缘子串电弧的形成和发展要经过几个阶段:刷状放电、明亮电弧的形成、主电弧的形成、主电弧通道的延伸、局部电弧跃变(闪络)。 不同型式的绝缘子串,在电弧发展的同一阶段所需的时间和电弧发展的速率不同;
短句来源
     e. the potential of nozzle is not adaptable to theelectrical field of plasma arc.
     虽然主、继弧干涉现象与双弧现象个同,但两者产生的原因相同:即都是由于喷嘴电位不能适应主电弧弧柱电场。
短句来源
     The interference can be efficiently avoided by uncontinuous pi-lot arc which can make the potential of nozzle adaptable to the plasma arc,decrease the phe-nomenon of double arc and improve the stability of weld formation in keyholing PAWprocess.
     采用与等高于主电弧极性变化相适应的断续维弧可使喷嘴电位适应主电弧电场,从而圆满地解决方波交流等离子弧焊主、维弧相互干涉问题,并可避免双弧和进一步提高焊缝成型稳定性。
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  相似匹配句对
     The Main Circuit Character of High-impedance Electric Arc Furnace
     高阻抗电弧炉的电路特征
短句来源
     The Main Circuit Designing of High Impedance Electric Arc Furnace
     高阻抗电弧电路的设计
短句来源
     Separation of main work and non-main work;
     辅分离;
短句来源
     ELECTRIC ARC Zn SPRAYING TECHNOLOGY
     电弧喷锌技术
短句来源
     High Speed Rotating Arc Sensor
     高速旋转电弧传感器
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  main arc
Those samples from small volcanic centers north of the main arc (second arc) are characterized by low ?Sr.
      
The main arc (Miocene-Quaternary) is dominated by weakly tholeiitic, with lesser, alkalic basalts.
      
In this paper, main arc-length-type methods are reviewed and compared, and the possible reasons of failures in tracing analysis are briefly discussed.
      
Measurements were taken using air bag samplers placedin an arc at 3.5 km (first experiment) and 1 km (second andthird experiments) from the source; some trap samplers wereplaced outside the main arc in the outskirts of the city.
      
This is due to the fact that the filter, when biased positively, collects a considerable negative current from the main arc discharge.
      
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The interfering mechanism of plasma arc with pilot arc has been studied in Verti-cal-up syncrowave A. C. PAW in this paper. It shows that the directions of currents and cor-responding electrical fields of both plasmd arc and pilot are are opposite as the polarity ofworkpiece is changed into negative, so that the accumulating charges adjancent to the tip oftungsten and the surface of orifice will be randomly changed, which may be favourtlble forplasma arc but not for pilot arc, or on the contrary, or unfavourable...

The interfering mechanism of plasma arc with pilot arc has been studied in Verti-cal-up syncrowave A. C. PAW in this paper. It shows that the directions of currents and cor-responding electrical fields of both plasmd arc and pilot are are opposite as the polarity ofworkpiece is changed into negative, so that the accumulating charges adjancent to the tip oftungsten and the surface of orifice will be randomly changed, which may be favourtlble forplasma arc but not for pilot arc, or on the contrary, or unfavourable for the both, or favoura-ble for the both. All the Se will make the plasma arc unstable. Although the phenomenon ofarc interference is different from that of double arc, the reason which causes the interference isthe same as that do es the double arc,i.e.the potential of nozzle is not adaptable to theelectrical field of plasma arc. The interference can be efficiently avoided by uncontinuous pi-lot arc which can make the potential of nozzle adaptable to the plasma arc,decrease the phe-nomenon of double arc and improve the stability of weld formation in keyholing PAWprocess.

本文对方波交流等离子弧焊的主、维弧相互干涉现象进行了研究。理论分析和试验结果表明:主、维弧相互干涉的原因是由于工件极性为负时反极性主电弧与维弧的电场强度、电流流向相异,使钨极和喷嘴表回聚集电荷发生或者有利于主弧(与工件为正时相比,这种有利状态的程度有所降低),不利于维弧;或者相反;或者既个利于主弧,也不利于维弧;或者对两电弧部有利的状态转变,因而导致电弧燃烧不稳定。虽然主、继弧干涉现象与双弧现象个同,但两者产生的原因相同:即都是由于喷嘴电位不能适应主电弧弧柱电场。采用与等高于主电弧极性变化相适应的断续维弧可使喷嘴电位适应主电弧电场,从而圆满地解决方波交流等离子弧焊主、维弧相互干涉问题,并可避免双弧和进一步提高焊缝成型稳定性。

In this paper, the arc stability of WPAW is analyzed in detail and a new method has been proposed on the basis of experiment. Being different from the conventional method in power supply and wire connection, the new method can overcome the interference of plasma arc with pilot arc and the deterioration of tungsten, improving the stability of PAW arc effectively. Tests show that adopting the new method to weld aluminium, magnesium and their alloys, the arc stabiligy, cathode cleaning and weld appearance are...

In this paper, the arc stability of WPAW is analyzed in detail and a new method has been proposed on the basis of experiment. Being different from the conventional method in power supply and wire connection, the new method can overcome the interference of plasma arc with pilot arc and the deterioration of tungsten, improving the stability of PAW arc effectively. Tests show that adopting the new method to weld aluminium, magnesium and their alloys, the arc stabiligy, cathode cleaning and weld appearance are satisfactory.

本文较深入地分析了变极性(方波交流)等离子弧焊电弧稳定性问题,并在试验基础上提出了新的方法。克服了主电弧负半波时的主、维弧相互干涉和钨板烧损等缺点,提高了电弧的稳定性。在焊接铝、镁及其合金时阴极清理作用明显。

 
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