| 刘 建,$2,$2.凹印机喷风嘴风速损失问题的流体动力学分析[J].轻工机械,2011,29(3): |
| 凹印机喷风嘴风速损失问题的流体动力学分析 |
| Fluid Dynamics Analysis about the Lose of the Velocity of the Air Nozzles of Gravure Press |
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| DOI： |
| 中文关键词: 印刷机械 凹印机 流体动力学 干燥装置 风嘴 |
| 英文关键词:printing machinery gravure printing machine fluid dynamics drying device air nozzles |
| 基金项目: |
| 刘 建 $2 $2 |
| 西安理工大学 印刷包装工程学院 |
| 摘要点击次数: 1758 |
| 全文下载次数: 98 |
| 中文摘要: |
| 现有凹印机干燥装置喷风嘴出风速度达不到要求，导致印品干燥不充分,同时降低了印刷速度。实际上，干燥效率低已经成为制约凹印机速度的主要因素。通过流体动力学的计算来模拟热风在风嘴内的流动状态，从结构设计上找出影响热风速度的主要因素，为干燥装置的优化改进提供理论依据，解决设计生产过程中的盲目性。通过对现有的喷风嘴结构的数值模拟计算得出：风嘴内部存在2个大的涡流区域，对热风的流速影响非常明显；喷风口处的风速与风压存在不均匀性，2者存在反比关系。其结果将对于凹印机改进设计具有十分重要的意义。 |
| 英文摘要: |
| With existing drying device in gravure press， the air velocity of the air nozzles can not meet the processing requirement,which leads to get insufficient drying and lower the printing speed.In fact,the drying efficiency has become a key factor in restricting the printing speed of gravure printing.The paper simulated the fluid state of heat air inner the air nozzles through calculation fluid dynamics, and from construction designs，found out the main factors, which influence the heat air speed, thus provided the theory basis to optimal improvement the drying device as well as solved the blindness in processing design. The simulative, calculation shows that the existing two turbulent flow areas affect the velocity of the air nozzles; and in this position, the air pressure and velocity are uneven with inverse proportion. These analyse will play an important role in gravure printing machine design. |
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