中国机械工程
中國機械工程
중국궤계공정
China Mechanical Engineering
2015年
19期
2640-2645
,共6页
毛聪%周鑫%谭杨%孙小丽
毛聰%週鑫%譚楊%孫小麗
모총%주흠%담양%손소려
喷嘴%雾化%数值仿真%微量润滑%磨削
噴嘴%霧化%數值倣真%微量潤滑%磨削
분취%무화%수치방진%미량윤활%마삭
nozzle%atomization%numerical simulation%minimum quantity lubrication(MQL)%grinding
为了减小磨削时砂轮表面气障层的影响,提高磨削液润滑和冷却的效果,设计了一种双喷口结构的喷嘴。分析了微量润滑雾化机理,采用二级雾化理论建立了雾化数学模型,对双喷口喷嘴的雾化过程进行了仿真分析,并对仿真结果进行了验证。研究结果表明:双喷口喷嘴能有效减小雾滴直径,提高磨削液的雾化效果;辅助喷口雾滴可以扰乱砂轮表面的空气环流,减小气障层对主喷口雾滴流向的影响,促使主喷口喷出的雾滴能顺利进入磨削区。
為瞭減小磨削時砂輪錶麵氣障層的影響,提高磨削液潤滑和冷卻的效果,設計瞭一種雙噴口結構的噴嘴。分析瞭微量潤滑霧化機理,採用二級霧化理論建立瞭霧化數學模型,對雙噴口噴嘴的霧化過程進行瞭倣真分析,併對倣真結果進行瞭驗證。研究結果錶明:雙噴口噴嘴能有效減小霧滴直徑,提高磨削液的霧化效果;輔助噴口霧滴可以擾亂砂輪錶麵的空氣環流,減小氣障層對主噴口霧滴流嚮的影響,促使主噴口噴齣的霧滴能順利進入磨削區。
위료감소마삭시사륜표면기장층적영향,제고마삭액윤활화냉각적효과,설계료일충쌍분구결구적분취。분석료미량윤활무화궤리,채용이급무화이론건립료무화수학모형,대쌍분구분취적무화과정진행료방진분석,병대방진결과진행료험증。연구결과표명:쌍분구분취능유효감소무적직경,제고마삭액적무화효과;보조분구무적가이우란사륜표면적공기배류,감소기장층대주분구무적류향적영향,촉사주분구분출적무적능순리진입마삭구。
In order to reduce the impacts of gas barrier,a double-spout nozzle was proposed.The atomization mechanism of MQL was analyzed,and the mathematical model was established by two-stage atomization model.The atomization process of the double-spout nozzle was simulated to analyses the atomization properties,and experiments were carried out to verify the simulation.The results show that the structure of the double-spout can effectively decrease the diameter of droplets and im-prove the atomization performance.The droplets sprayed by the assistant j et can break the air barrier layer and reduce the effect of the gas barrier layer on droplet flow.Therefore,the droplets from the main j et can enter the grinding zone easily.