场量测量在变交漏磁检测技术中的应用

介绍了以AD637为基础建立的交变漏磁场测量调理电路,完成了基于A3515霍尔元件的漏磁场场量测量传感器的设计,阐述了交变漏磁场测量的工作原理和测试方法,通过对钢管矩形裂纹的测试结果表明,该设计实现了测试的目的,在对缺陷信号进行分析和处理的基础上,提出了基于"缺陷环"的识别方法.     

错位纺纱对紧密纺成纱质量的影响

探讨错位纺纱对国产改造紧密纺成纱质量的影响及其机理。研究结果表明:错位纺纱改变了加捻三角形的形状和尺寸,因而改变了成纱结构和性质,错位纺纱对成纱质量的影响程度与错位方向和捻向的匹配有关,Z捻左斜与S捻右斜对成纱质量改善较显著;纺纱断面尺寸的变化也对成纱质量有着复杂的影响,一些因素对成纱质量是不利的,在实际生产中,应注意通过专件和工艺的配合加以改善;错位量的精确控制是错位纺纱的发展方向。     

纺织厂组合式空调机组智能模糊控制系统的开发

以化纤厂纺丝车间侧吹风为例，介绍了应用９０年代工控技术开发研制的纺织厂及化纤厂空调系统用组合式空调机且的智能模糊控制系统。     

集聚纺车间地沟均匀吸风设计方法探讨

探讨集聚纺车间地沟均匀吸风设计方法。介绍了地沟均匀吸风的设计原理和实现均匀吸风的措施;分析了变风量系统对均匀吸风性能的影响;介绍了变风量均匀吸风系统的设计;计算分析表明:回风沟道应采用变截面分段设计法,吸风口采用条缝型形高速自适应风口,吸风口面积之和与沟道截面积之比不大于0.4,前后吸口的吸风不均匀程度可以控制在15%以内。认为:采用支沟道变截面分段设计能较好地控制吸风的均匀性,可以保证集聚纺车间气流均匀稳定。     

NWQ系列新型结构网格圈使用效果分析

探讨NWQ系列新型结构网格圈的结构特点与使用性能。分析阐述了NWQ系列网格圈的结构特点与使用性能,并与国产及进口网格圈进行了纺纱质量对比。结果表明:该网格圈能降低成纱毛羽、提高成纱强力,使用性能与进口网格圈相当。认为该网格圈结构设计新颖,具有抗堵不黏花、抗拉强度高、不易变形、运行稳定、使用寿命长、性价比高等特点,并具有自清洁和节能功效,是较好的进口网格圈替代产品。使用中应注意加强温湿度、运转清洁及设备专件维护管理,以更好地发挥新型网格圈的作用。     

带盖环式炉新焙烧制度的试行

对国内外环式炉现行焙烧制度进行研究分析,提出了一种新焙烧制度。运行实践表明：新焙烧制度可节能降耗,炉室上下温差可缩小到１０５℃以下,制品焙烧质量能得到改善。     

循环旋风分离器内气液两相流动数值模拟

采用雷诺应力模型RSM对循环旋风分离器内气液两相流动的情况进行了数值模拟研究,讨论了循环旋风分离器内切向速度、轴向速度、径向速度、压力场、雷诺应力的分布特点以及相同入口速度下分离器内液滴运动轨迹与分离器的分离效率。数值模拟结果表明,循环旋风分离器切向速度呈现明显的驼峰状,轴向速度上行流和下行流明显,径向速度相对较小,压力由轴心向外逐渐升高,雷诺应力分布复杂且无明显规律,分离器对小直径液滴分离效率较低,入口速度对分离效率的影响比较明显。     

EFFECT OF OPERATING VARIABLES ON BED TO WALL HEAT TRANSFER IN A CIRCULATING FLUIDIZED BED

Heat transfer coefficients were measured for 227 and 87 micron size particles of silica sand in a 102 mm dia. and 5.5 m tall circulating fluidized bed made of plexiglass. Effects of solid circulation rate, fluidization velocity, bed density and particle sizes were studied. The heat transfer coefficients were calculated from the temperatures measured along the axis of a 25 mm dia 100 mm long cylindrical heat flux meter.     

内燃机气缸套—活塞环表面流量因子的确定及混合润滑分析

提出一种在分析气缸套—活塞环润滑特性时根据气缸套、活塞环表面粗糙度确定表面流量因子的办法，克服了以往计算流量因子的不足，充分考虑到影响流量因子的各种因素，同时也可反映出气缸套──活塞环在磨损过程中表面粗糙度变化的影响，从而能准确分析气缸套──活塞环润滑特性的动态变化。     

Characterization of tributyrin hydrolysis by immobilized lipase on woolen cloth using conventional batch and novel spinning cloth disc reactors

Optimal loading and operating conditions for a new, superior immobilization of amano lipase from Pseudomonas fluorescens on woolen cloth were determined. The optimal enzyme loading was 46.8 mg g dry cloth⁻¹ with activity of 200 U. A batch reactor was used to characterize process conditions important to industrial application of the wool immobilized lipase. The optimal pH for immobilized lipase in tributyrin hydrolysis was 7, slightly lower than that of free lipase (pH 8). The optimal temperature for both free and immobilized lipase was 45 °C. The immobilized lipase was more stable to reuse than some other lipase immobilizations, maintaining 85% of its activity after 6 long term runs and 75.8% of the original activity after storage of 40 weeks at 4 °C. The thermal stability of lipase was improved by 2.4 times after immobilization. The thermal deactivation rate of immobilized lipase followed the Arrhenius law with E_d = 199 kJ mol⁻¹. The Michaelis–Menten constant (K_m) of the lipase increased from 1.63 mM to 4.48 mM after immobilization. The immobilized lipase was also successfully applied for tributyrin hydrolysis in a novel enzyme process intensification technology – the spinning cloth disc reactor (SCDR): conversion increased by around 13% under similar conditions compared to a conventional batch stirred tank reactor. The SCDR is therefore key to exploiting the advantages of the wool immobilized lipase developed in this work.