PASSIM卷接机组负压检测压力场分析  

Analysis of Pressure Field of Cigarette Inspection System in PASSIM Cigarette Maker

作　　者：王浩[1] 余徽[1] 周密[1] 李理[1] 王天亮[1] 

机构地区：[1]四川大学化学工程学院,成都市一环路南一段24号610065

出　　处：《烟草科技》2013年第12期17-20,共4页Tobacco Science & Technology

摘　　要：为从理论上获取PASSIM卷接机组烟支质量检测系统负压检测灵敏度和检测缺陷范围,利用计算流体力学(Computational Fluid Dynamics,CFD)对烟支滤嘴端压力与烟支表面缺陷圆孔面积关系进行了研究分析。通过现场测量、三维建模、边界条件简化和设置参数,采用Star CCM+进行计算和结果整理与分析,得出了烟支不同模拟圆孔缺陷时检测点处的真空度值。结果表明:当烟支表面缺陷总面积小于=0.5mm圆孔面积时,检测传感器端压力变化较小,很难检测出缺陷烟支;当烟支表面缺陷总面积大于=3mm圆孔面积时,检测传感器端的真空度值约等于负压环境的真空度值,容易检测出缺陷烟支;当烟支表面缺陷总面积位于0.5 mm<<3 mm圆孔面积范围内时,随缺陷总面积的增加,检测的真空度值成近似线性增加。该计算结果可为负压检测系统设计、烟支质量在线检测系统调整吸风系统负压、设置负压检测剔除极限等提供理论参考,减少调试工作量和调试时间。To obtain the detection sensitivity of negative pressure and detectable defect range of the cigarette inspection system in PASSIM cigarette maker, the relationship between the pressure at the filter end of cigarette and the area of defective hole on cigarette surface was analyzed with Computational Fluid Dynamics （CFD）. By means of on-site measurement, 3-D modelling, boundary condition simplifying and parameter setting, the vacuum values at the detection points on cigarettes with simulated defective holes of different sizes were computed with Star CCM＋. The results showed that： 1） When the area of a defective hole was less than that of a circle with the diameter of 0.5 mm, the defective cigarette was undetectable because minute pressure change at the sensor end. 2） When the area of a defective hole was larger than that of a circle with the diameter of 3 mm, the defective cigarette was easy to be detected because the vacuum value at the sensor end was close to that of the negative pressure circumstance. 3） When the area of defective hole ranged from the area of a circle with the diameter of 0.5 mm to that of 3 mm, the detected vacuum value approximately linearly increased with the increase of defective area. The computed results could provide theoretical references for negative pressure detecting system designing, negative pressure adjusting and rejecting limit setting of online cigarette inspection system.

关 键 词：PASSIM卷接机组 负压检测 计算流体力学(CFD) 烟支缺陷 圆孔面积 

分 类 号：TS433[农业科学—烟草工业]