低焦油滤嘴烟支总通风率稳定性的研究与应用

在卷烟生产中,接装纸预打孔易堵塞、胶水易渗透到无胶区,导致通风面积缩小,滤嘴烟支总通风率下降,总通风率SD值较高。新型带缓冲有胶区控胶轮的设计与应用,解决了接装纸预打孔受堵,无胶区通风面积减小的问题,提高了低焦油卷烟总通风率的均值,降低总通风率SD值,减少焦油吸入量。     

PROTOS70卷烟机接装纸胶后刚性纠偏装置的研制

PROTOS70型卷烟机接装纸输送装置的稳定性较差,现有接装纸长短调整装置存在设计缺陷,是导致接装纸偏移、错牙,造成卷烟产品接装纸长短超标或翘边等缺陷的主要原因。通过分析和研究接装纸输送装置的结构和工作原理,确定在接装纸进入切纸鼓轮前的位置加一种纠偏定位装置,能够明显提高接装纸输送的稳定性。基于该种纠偏原理,设计研制出一种新型接装纸刚性纠偏装置。这项改进增强了设备工艺过程控制能力,使接装纸搓接缺陷发生频次较加装前减少了30.17次/周,废品质量降低了4.37 kg/周,提高了烟支产品的外观质量。     

基于智能传感器技术的卷烟包装质量在线检测系统设计

在卷烟包装工艺中,受到烟支来料、卷烟包装材料、设备零部件磨损或胶垢等因素影响,不可避免地会出现烟支类、烟包类产品质量缺陷,传统卷烟包装机中的缺陷检测系统采用如光电开关等简单的检测元件,存在检测精度低、故障率高、维护困难等缺点,不能保证好烟包产品质量。基于对智能传感器技术的研究和应用,设计一种卷烟包装质量在线检测系统,该系统包含烟支质量检测系统、盒内质量检测系统和小盒外观检测系统三个子系统。其中,烟支质量检测系统采用激光测距传感器对烟支空头、缺支、断支等烟支缺陷进行检测,盒内质量检测系统和小盒外观检测系统采用机器视觉检测技术,对烟包内的内衬纸、内框纸以及烟包外观存在的缺陷进行检测。各子系统将检测到的缺陷信息传送给包装机的PLC控制器,PLC发出控制指令给包装机原有的烟包剔除机构,从而剔除缺陷烟包。卷烟包装质量在线检测系统安装应用后,能有效识别烟支、内框纸、内衬纸和烟包外表面存在的缺陷,缺陷识别剔除率达99%以上,检测精度较高,提升了烟包产品的质量水平。     

YJ29接装机供胶装置控胶辊的改进

YJ29接装机在正常生产过程中,由于所使用的水松纸和乳胶质量差异,影响胶辊对水松纸的涂胶效果,导致接装机烟支搓接异常,致使成品烟支出现漏气、掉嘴、翘边等质量现象。我们在认真分析论证的基础上,将控胶辊的涂胶区加宽,并在涂胶区的两端各设一加深区,来增加胶辊对烟嘴接合部的供胶量,提高了设备对原辅材料的适应性,大大改善烟支的搓接质量,保证了产品质量,降低了材料消耗,提高了设备效率。     

ZJ19B卷接机组接装纸定位装置的设计及应用

为解决ZJ19B卷接机组生产过程中烟支接装纸长度随着接装纸的用量变化和动态拼接时,频繁出现内、外排烟支接装纸长度波动较大,甚至超出工艺标准要求的问题。本文对现有接装纸定位装置进行改进,解决了ZJ19B卷接机组接装纸在生产过程中长度偏差波动大的问题。改进后,滤嘴烟支接装纸长短偏差不合格率由原先的10%降低到0.5%,大幅度地提高了烟支外观质量合格率。     

探析ZJ118A在线烟支端激光打孔位置检测装置的设计

该装置使用低角度打光方式，结合原机角度触发相机采集到孔的高质量清晰图像，再采用数字图像处理技术，完成每个孔的位置提取，计算烟支运行方向的对应孔位置是否正确、各孔分布是否均匀，最终实现烟支端激光打孔位置次品双倍烟支的移步剔除计算与研究。装置实现在线实时检查烟支端打孔情况，如漏打或多打、错打、打孔间距不均匀等问题，间接保障纸通风、总通风，满足工艺指标，对不合格的次品烟支即检即剔。     

烟支滤嘴搓接装置的优化设计

针对当前烟支滤嘴接装大多采用的搓板式接装技术,由于剥离趋向的存在使水松纸极易出现泡皱缺陷,影响烟支接装的质量的现状,研究设计了一种新型烟支和滤嘴接装装置。该装置在原有设备基础上将搓接板设计成带加滚针的搓板,利用正搓原理达到了消除剥离趋向问题的目的,并减少了接装过程中产生水松纸泡皱的缺陷。采用新烟支和滤嘴接装装置,提高了卷烟机烟支接装质量。     

ZJ17卷接机组最终切割烟支长度控制装置的研制

ZJ17卷接机组MAX滤嘴接装机最终切割圆刀,将搓接成型的双倍长度的滤嘴卷烟,从中间将其分切为长度一致的两支滤嘴烟支,分切后的两支烟长度虽然基本能够保证在工艺要求84±0.5mm的允差范围,但偏离烟支长度的中值线84mm的烟支数量较多,造成车间卷制质量六西格玛水平低的问题。ZJ17卷接机组最终切割烟支长度控制装置的研制,能实现双倍长度的滤嘴卷烟在最终切割鼓轮上轴向移动,自动纠偏,从而保证了最终圆刀分切后两支滤嘴烟支长度的一致性,提高了产品质量。     

卷烟机设备升级结构趋势

卷烟机卷接设备是卷烟业生产中最为主要的技术装备，主要适用于生产符合工艺标准的无嘴烟支和滤嘴烟支的专用卷烟设备，其功能可分为三种，卷烟机、装盘机和接装机。卷烟机的发展历程从1875年的第一台卷烟机直到现在经历了填装式、重力下丝式和吸丝成形式三种变革。本文主要通过介绍卷烟机设备的结构改造和发展趋势来进行学术探究。     

影响烟支端部落丝量的因素研究

通过对可能影响烟支端部落丝量的各因素如烟支质量、烟支密度(分整支烟支密度和烟支端面密度)、烟支水份、烟支含末率、烟丝结构等进行测试和分析,从而确定影响烟支端部落丝量的主要因素,为卷烟生产中控制烟支端部落丝量提供依据和指引。     

异丙醇萃取-气相色谱法同时测定

以茴香脑为内标,采用异丙醇萃取-气相色谱法同时测定烟用接装纸和包装纸中14种邻苯二甲酸酯类化合物残留.该方法的平均回收率为86.5%～111.9%,检测限为0.18～1.48μg/g,相对标准偏差除邻苯二甲酸二环己酯(DCHP)为5.21%外,其余均小于5%.该方法的分离效果好,灵敏度高,能满足烟用接装纸和包装纸中邻苯二甲酸酯类化合物的检测.     

异丙醇萃取-气相色谱法同时测定烟用接装纸和包装纸中邻苯二甲酸酯类化合物

以茴香脑为内标,采用异丙醇萃取-气相色谱法同时测定烟用接装纸和包装纸中14种邻苯二甲酸酯类化合物残留。该方法的平均回收率为86.5%～111.9%,检测限为0.18～1.48μg/g,相对标准偏差除邻苯二甲酸二环己酯(DCHP)为5.21%外,其余均小于5%。该方法的分离效果好,灵敏度高,能满足烟用接装纸和包装纸中邻苯二甲酸酯类化合物的检测。     

基于Ansys的钢水包倾翻力矩研究

应用Ansys软件对钢水包在倾翻过程中的总质量、质心、转动惯量、倾翻力矩等倾翻特性随倾翻角度的变化进行分析研究,利用最小二乘法对倾翻力矩和倾翻角度进行数字拟合,得出当倾翻角度为50°时,倾翻力矩为最大值54 254 N·m。该方法对钢水包结构及倾翻电动执行机构设计具有重要工程应用价值。     

翻斗式雨量传感器的改进方法

文章利用甘肃省陇南市气象局409个自动气象站2 a的维护维修和改进数据记录,深入分析了翻斗式雨量传感器的运行故障原因,创新地提出了翻斗式雨量传感器改进方法。改进后的雨量传感器总故障率降低,该改进方法将很大程度上提高自动气象站的雨量观测数据质量,也为翻斗式雨量传感器的改良提供了重要的参照依据。     

测定物理指标鉴别真伪卷烟的研究

卷烟物理指标是卷烟生产企业在生产过程中严格控制的质量指标。本文通过对五个卷烟品牌的真、伪卷烟样品的吸阻、圆周、硬度、总通风率四项主要物理指标进行对比测定,应用假设检验分析,结果表明：真、伪卷烟的硬度存在显著性差异;采用滤嘴通风技术的真品卷烟的总通风率和吸阻与假冒伪劣卷烟存在显著性差异。这三项物理指标可以作为卷烟真伪鉴别的重要依据。     

Contact deformation of shaft-bush joints under the action of radial force and a tipping moment

Shaft-bush joints with clearance and tightness are investigated, on the assumption of absolute rigidity of the contact parts and pliability of the contact layer. The rotational angle and the decrease in intervening distance due to the radial force have been determined as a function of the tipping moment. The calculation results and experimental data are compared for a joint with gap, under a radial force.     

倾斜式太阳能烟囱强化自然通风理论研究

倾斜式太阳能烟囱利用太阳辐射增加烟囱内空气温度,烟囱内外空气温差形成的密度差提供了自然通风所需的驱动力。根据质量守恒和能量守恒方程给出倾斜式太阳能烟囱通风量计算方法,并将计算结果与文献试验测试值进行了对比,分析了烟囱长度、宽度、深度及倾角对通风量的影响,计算了倾斜式太阳能烟囱用于乌鲁木齐地区的通风量,并与竖直式烟囱进行对比,计算结果表明,相同结构尺寸下增加50°倾角可使通风量增加11.52%,是一种值得进一步研究的自然通风方式。     

Design theory of full face rock tunnel boring machine transition cutter edge angle and its application

At present, the inner cutters of a full face rock tunnel boring machine (TBM) and transition cutter edge angles are designed on the basis of indentation test or linear grooving test. The inner and outer edge angles of disc cutters are characterized as symmetric to each other with respect to the cutter edge plane. This design has some practical defects, such as severe eccentric wear and tipping, etc. In this paper, the current design theory of disc cutter edge angle is analyzed, and the characteristics of the rock-breaking movement of disc cutters are studied. The researching results show that the rotational motion of disc cutters with the cutterhead gives rise to the difference between the interactions of inner rock and outer rock with the contact area of disc cutters, with shearing and extrusion on the inner rock and attrition on the outer rock. The wear of disc cutters at the contact area is unbalanced, among which the wear in the largest normal stress area is most apparent. Therefore, a three-dimensional model theory of rock breaking and an edge angle design theory of transition disc cutter are proposed to overcome the flaws of the currently used TBM cutter heads, such as short life span, camber wearing, tipping. And a corresponding equation is established. With reference to a specific construction case, the edge angle of the transition disc cutter has been designed based on the theory. The application of TBM in some practical project proves that the theory has obvious advantages in enhancing disc cutter life, decreasing replacement frequency, and making economic benefits. The proposed research provides a theoretical basis for the design of TBM three-dimensional disc cutters whose rock-breaking operation time can be effectively increased.     

基于S7300的卷烟机水松纸静态拼接

节能减排越来越得到企业的重视,在烟草行业的卷烟生产过程中水松纸由于拼接带来的浪费一直十分严重,该文介绍的水松纸静态拼接系统可以从根本上解决这种浪费。     

A study on performance improvement of corrugated type total heat exchanger considering the structure of flow passage on surface

Three types of flow passage structure of a total heat exchanger (perforated type, slit type, and embossed and perforated type) are studied to enhance the heat exchange performance of a heat recovery ventilation system (total heat exchanger). The perforated type has four punched rows of 6mm holes in the flow passage channel, and the slit type has six processed rows of 40mm length. The embossed and perforated type has holes of about 1mm diameter and protrusions of about 0.2mm height on all surfaces. The heat exchange efficiency of the modified total heat exchanger was compared to that of a general total heat exchanger with a smooth surface. The Korean Standard (KS) heat recovery ventilator test condition was applied for tests. In the case of cooling operation based on a typical Reynolds number of 140 (typical air flow rate of 100 m³/hr), the perforated type, slit type, and embossed and perforated type showed temperature efficiency improvement of 1.2%, 2.5%, and 5.0%; latent efficiency improvement of 18.0%, 32.3%, and 24.5%; and enthalpy efficiency improvement of 7.9%, 11.5%, and 11.2%, respectively. The corresponding improvements of heating operation were 3.0%, 3.4%, and 4.0%; 5.0%, 6.6%, and 18.7%; 3.2%, 4.3%, and 7.7%, respectively. On the other hand, the air pressure drop throughout the modified flow passage of the total heat exchanger increased by up to 1.7% at the typical Reynolds number of 140, from the air pressure drop of the regular total heat exchanger. This paper was recommended for publication in revised form by Associate Editor Dae Hee Lee Kyungmin Kwak received his B.S., M.S. and Ph.D. degrees in Mechanical Engineering from Yeungnam University, Korea, in 1993, 1995 and 1999, respectively. Dr. Kwak is currently a Researcher at the Automotive RIC at Kyungil University, Korea. His research interests include heat transfer, refrigeration and air control. Cheolho Bai received his B.S. and M.S. degrees in Mechanical Engineering from Seoul Na-tional University, Korea, in 1984 and 1986, respectively. He then received his Ph.D. from UCLA, USA, in 1992. Dr. Bai is currently a Professor at the School of Mechanical Engineering at Yeungnam University in Kyungsan, Korea. His research interests include heat transfer, refrigeration and air control.