| 引用本文: | 姚帅帅， 贾秀杰， 王兴， 李剑峰， 李建勇.发动机气门积碳的熔盐清洗工艺[J].中国表面工程,2015,28(4):121~126 |
| YAO Shuaishuai, JIA Xiujie, WANG Xing, LI Jianfeng, LI Jianyong.Molten Salt Cleaning Process of Carbon Deposition on Engine Valve[J].China Surface Engineering,2015,28(4):121~126 |
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| 摘要: |
| 为了研究再制造过程中发动机气门积碳的熔盐清洗工艺，采用MiniLab软件进行方案设计，建立了回归方程和响应面模型，研究了配方和温度对熔盐清洗能力的影响，使用清洁度检验设备检验了熔盐清洗积碳效果。结果表明，配方中NaNO2质量分数增加，NO-2可以同时与多种有机物发生反应，相对于NO-3离子与C反应，OH-、NO-2与有机物的反应效率要高得多。而温度不仅影响热冲击、润湿等作用，还会影响化学反应的速率。因此随着清洗温度和NaNO2质量分数的升高，清洗积碳的能力增强。熔盐清洗积碳的最佳工艺参数为：温度在330～360 ℃，NaOH质量分数控制在30%，NaNO2质量分数在40%以上。熔盐清洗技术可以作为一种高效、洁净的清洗方法在再制造生产中广泛使用。 |
| 关键词: 积碳 熔盐 清洗 再制造 |
| DOI：10.11933/j.issn.1007-9289.2015.04.016 |
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| Molten Salt Cleaning Process of Carbon Deposition on Engine Valve |
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YAO Shuaishuai, JIA Xiujie, WANG Xing, LI Jianfeng, LI Jianyong
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School of Mechanical Engineering, Shandong University
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| Abstract: |
| To study the molten salt cleaning process of carbon deposition on remanufacturing engine valve, a experiment scheme was designed by the Minilab, the experimental data were fitted and the response surface models were built. The influence of the formula and temperature on the ability of molten cleaning carbon deposition was studied. The cleaning effect is tested by cleanliness testing equipment. The results show that with increasing NaNO2 mass fraction, NO-2 can react with a variety of organic matter, its efficiency is much higher than the NO-3 with C , and OH- with organic. The temperature affects not only the thermal shock, wetting and other effects, but also the rate of chemical reactions. Thus, with increasing temperature and mass fraction of NaNO2, the cleaning effect is reinforced. The optimal parameters of molten salts cleaning is the temperature of 330360 ℃, NaOH mass fraction of 30%, and NaNO2 mass fraction above 40%. As an efficient and cleaned method, molten salt cleaning technology can be widely used in the remanufacturing production. |
| Key words: carbon deposition molten salt cleaning remanufacturing |
