The invention relates to an axial air inlet channel of a plasma torch, belonging to the field of arc plasma torch. The channel is located in the hollow electrode sleeve, which consists of the electrode sleeve and the cavity between the electrodes. The gas introduced from the top of the hollow electrode sleeve can be exported from the end of the electrode sleeve and flowed into the plasma torch chamber. The top and bottom areas of the channel are composed of holes formed by contacting the outer surface of the electrode and the inner surface of the electrode sleeve along the axis, while the middle area is composed of holes formed by contacting the outer surface of the electrode and the inner surface of the electrode sleeve along the axis, and the cross-sectional area of the middle area of the channel is smaller than that of the top and bottom areas. The gas flow velocity from the end of the electrode sleeve is much faster than that from the top of the electrode sleeve. The high-speed gas flow is conducive to the compression of the arc at the nozzle and the enhancement of the arc thermal effect. At the same time, the gas distributes uniformly in the flow process, which is conducive to improving the stability of the arc.
【技术实现步骤摘要】
一种等离子炬的轴向进气通道
本专利技术涉及一种等离子炬的轴向进气通道,属于电弧等离子体炬领域。
技术介绍
压缩等离子弧相比自由等离子弧是经由等离子炬实现“机械压缩效应”、“热压缩效应”和“自磁压缩效应”三重压缩效应而获得的高能量的压缩电弧,因其高的能量广泛应用于焊接、喷涂、切割、淬火和堆焊等材料加工领域。机械压缩效应主要是利用等离子炬的喷嘴来限制弧柱直径,提高其能量密度;热压缩效应也称为流体压缩效应,是利用气流或水流的冷却作用使得电弧得到压缩,气体的压力和流速越高,越有利于电弧的压缩。等离子炬常见的进气通道有轴向、径向和切向三种,轴向和径向进气通道是在等离子炬腔体上开设进气孔直接将气体导入腔体内,气体在腔体内沿腔体轴向流动;切向进气通道气体由腔体上的进气孔导入后进入气体分配环,从气体分配环流出后形成旋转气流沿腔体内旋转流动。气体沿腔体轴向流动时,只有采用较高的气流量或进气压力获得较高的气体流速才能在喷嘴处获得较好的热压缩效应,但是高流速容易使气体在等离子炬腔体内沿轴向流动时分布不均匀,影响电弧的稳定性。而气体沿腔体旋转流动时,气体流量较小时即可获得较高的流速,对电弧的压缩效果较好,气体在腔体内高速流动时分布也较均匀,电弧的稳定性较好。因此,与切向进气通道相比,轴向和径向进气通道在等离子炬上的应用较少。
技术实现思路
本专利技术的目的是为了克服现有等离子炬轴向进气通道进气时,气流沿腔体轴向高速流动时在等离子炬腔体内分布不均匀从而影响电弧稳定性的缺点,而提出的一种等离子炬的轴向进气通道。本专利技术所采用的技术方案如下:一种等离子炬的轴向进气通道,该通道位于空心电极 ...
【技术保护点】
1.一种等离子炬的轴向进气通道,其特征在于:该通道位于空心电极套内,由电极套和电极间的空腔构成,可将从空心电极套顶部导入的气体由电极套末端导出并流入等离子炬腔体内。
【技术特征摘要】
1.一种等离子炬的轴向进气通道,其特征在于:该通道位于空心电极套内,由电极套和电极间的空腔构成,可将从空心电极套顶部导入的气体由电极套末端导出并流入等离子炬腔体内。2.根据权利要求1所述的一种等离子炬的轴向进气通道,其特征在于:该通道顶部和底部区域由电极外表面和电极套内表面沿轴向...
【专利技术属性】
技术研发人员:黄齐文,潘璋,熊钊颋,黄闻欣,
申请(专利权)人:武汉华材表面科技有限公司,
类型:发明
国别省市:湖北,42
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