电弧

The results of simulation under different current, arc length and capacity of airstream show that the trends of change are in good agreement with arc theory. This can be considered a proof of exactness in the simulation.

对改 变电流、弧长和气流量对电弧各物理特性影响的模拟结果表明，其变化趋势与电弧理论基本吻合，同时也证实了该模拟的可靠性。

Based on the theory of magneto-hydro dynamics and real welding conditions,a three-dimension united mathematical model of TIG welding arc and weld pool was established.

根据磁流体动力学理论以及焊接的实际情况，建立了三维TIG焊接电弧与熔池的统一数学模型，避免了对电弧以及熔池界面条件的假定，使得对焊接电弧与熔池行为的分析与实际情况更近了一步。

Departures between welding arc and the centre of weld and their directions and measure are recognized from the images of the tracking weld.

根据这一结果，调整电弧与焊缝中心的相对位置，消除电弧与焊缝的偏离，达到焊接电弧准确跟踪焊缝的目的。

In addition, the effects of current, cathode cone angle and arc length on the current density and arc pressure distribution at anode surface in GTA welding are analyzed by the use of the built arc model, and the computed results agree well with the experimental results.

另外，运用建立的电弧数学模型，分析了焊接规范参数变化对直流GTAW电弧阳极表面电流密度和电弧压力径向分布规律的影响，计算结果与实验结论基本一致。

On the basis of analyzing running condition arc furnace system and researching characteristics of dust remover of arc furnace, taking the application of Harsvert-A in dust removing transformation of steelworks as an example, successful application of high-voltage frequency conversion technology on dust removing system of arc furnace in steelworks is introduced.

在分析了电弧炉设备的运行现状和研究了电弧炉除尘系统特点的基础上，通过Harsvert-A型高压变频器在某炼钢厂除尘系统改造中的应用实例，介绍了高压变频技术在炼钢厂电弧炉除尘系统中的成功应用。

Arc cutting;Arc welding;Arc welding cables;Arc-welding equipment;Blowpipes;Connectored joints;Construction requirements;Definitions;Degrees of protection;Dimensioning;Electric contact protection;Electrical engineering;Electrical safety;Environmental condition;Equipment;Feed;Feeder units;Feeding devices;Filler wire;MAG welding;Manual arc welding;Marking;MIG welding;Operating instructions;Performance requirements;Plasma arc cutting;Plasma-arc welding;Protection against electric shocks;Protective measures;Safety;Safety devices;Safety requirements;Specification;Temperature range;Test conditions;Testing;Testing conditions;Welding;Welding engineering;Welding equipment;Welding power supply;Wire guiding;Wires

中文标题弧焊设备。第5部分：焊丝进料装置中文主题词电弧切割；电弧焊接；弧焊电缆；电弧焊接设备；焊枪；连接器的连接件；结构要求；定义；防护等级；尺寸选定；电接触保护；电气工程；电气安全；环境条件；设备；进给量；进料装置；供片装置；填充金属丝；MAG焊接；手动弧焊；作标记；金属极惰气保护焊；操作说明书；性能要求；等离子体电弧切割；等离子电弧焊；防电击；保护措施；安全；安全装置；安全要求；规范；温度范围；试验条件；测试；测试条件；焊接；焊接工程；焊接设备；焊接电源；校正铜网；金属线

Arc cutting;Arc welding;Arc welding cables;Arc-welding equipment;Blowpipes;Connectored joints;Construction requirements;Definition;Definitions;Degrees of protection;Dimensioning;Electric contact protection;Electrical engineering;Electrical safety;Environmental condition;Equipment;Feed;Feeder units;Feeding devices;Filler wire;MAG welding;Manual arc welding;Marking;MIG welding;Operating instructions;Performance requirements;Plasma arc cutting;Plasma-arc welding;Protection against electric shocks;Protective measures;Safety;Safety devices;Safety requirements;Specification;Temperature range;Test conditions;Testing;Testing conditions;Welding;Welding engineering;Welding equipment;Welding power supply;Wire guiding;Wires

中文标题弧焊设备。焊丝进料装置中文主题词电弧切割；电弧焊接；弧焊电缆；电弧焊接设备；焊枪；连接器的连接件；结构要求；定义；防护等级；尺寸选定；电接触保护；电气工程；电气安全；环境条件；设备；进给量；进料装置；供片装置；填充金属丝；MAG焊接；手动弧焊；作标记；金属极惰气保护焊；操作说明书；性能要求；等离子体电弧切割；等离子电弧焊；防电击；保护措施；安全；安全装置；安全要求；规范；温度范围；试验条件；测试；测试条件；焊接；焊接工程；焊接设备；焊接电源；校正铜网；焊丝

In this paper, used the 2-D optical fiber measurement system to investigate the whole process of arc movement, and the influence of the arc movement to the post current zero state of arc.

本文借助光纤测试系统从微观上研究电弧的运动全过程，分析电弧运动形态对电流过零后电弧状态的影响。

Many researchers have investigated the influence of AMF on vacuum arc. And most of them point out that uniformly distributed AMF is preferable. However, at higher current even under very uniform AMF, vacuum arc still tends to constrict, which will result in the failure of break. Further more, very strong uniform AMF has some disadvantages also.

非均匀纵向磁场对真空电弧控制机理的研究纵向磁场可以使真空电弧在大电流时维持在扩散态，减轻了电弧对阳极和阴极的烧蚀，从而提高了真空开关的极限电流开断能力，因此在真空开关领域得到了广泛的应用。

Switching arc can be thought as a column because of its self-magnetic field pinch effect. Arc column is deformed by magnetic force that produced by circuit current flow. If the arc image was acquired from a orthongonal direction to arc column deformation force.

在分析低压电器开关电弧的低温等离子体特性、弧柱磁压缩效应的基础上，提出了基于电弧图象采集和非均匀有理B样条曲面拟合相结合的开关电弧可视化仿真模型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。