| 摘要: |
| 微束水蒸气等离子弧气流形态与其电弧形态、电弧特性密切相关。文中对水、水+乙醇及水+丙酮等不同介质的微束水蒸气等离子弧气流形态、电弧力进行了测试研究。气流形态测试结果表明,纯水介质的水蒸气等离子弧的气流扩展率最大,水+丙酮介质的水蒸气等离子弧的气流扩展率最小;随着乙醇或丙酮浓度的增加,气流的扩展率增大。电弧力的测试结果表明,纯水介质的水蒸气等离子弧的电弧力最小,水+丙酮介质的电弧力最大;随着乙醇或丙酮浓度的增加,电弧力增大。电弧形态、气流形态与电弧力决定了电弧的切割性能,在相同条件下,水+丙酮的水蒸气等离子弧切割速度最快,而纯水介质电弧的切割速度最慢。 |
| 关键词: 水蒸气 等离子弧 气流形态 电弧力 |
| DOI： |
| 分类号: |
| 基金项目:教育部骨干教师资助项目 |
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| Gas flow shape and arc pressure of micro-plasma arc with different medium aqueous vapor |
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HU Sheng-sun, BA Jia-ming, MENG Ying-qian, SHAN Ping
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School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
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| Abstract: |
| The gas flow shape of the aqueous vapor micro-plasma arcis closely related with the arc shape and arc characteristics.The gas flow shape and arc pressure of micro-plasma arc with different medium aqueousvapor are presented.The different mediums are water,aqueous alcoholand aqueous acetone.The results show that water medium arc gas flowexpansion rate is the largest,and the aqueous acetone medium arc gasflow expansion rate is the smallest.The gas flow expansion rate is extend~ed with increasing of the consistency of aqueous alcohol or aqueous ace-tone.The arc pressure of water medium arc is the smallest,the arc pres-sure of the aqueous acetone medium arc is the biggest.The arc pressureis increased with increasing of the consistency of aqueous alcohol or aqueous acetone.The cutting characteristics depende on the arc shape,gas flow and arc pressure.In same conditions,the cutting speed is the fastestin acetone medium aqueous vapor plasma arc,and the slowest in watermedium aqueous vapor plasma arc. |
| Key words: aqueous vapor plasma arc gas flow shape are pres-sure |
