粉喷桩技术在高速公路软基处理中的应用

粉喷桩作为软基处理的有效手段广泛应用于工程领域,本文结合高速公路软基施工实践,分析了粉喷桩的加固机理,介绍了粉喷桩的施工工艺流程、质量控制措施,并对粉喷桩软基处理效果进行了分析。应用结果表明,粉喷桩在处理高速公路软基中的可行性和有效性。     

雾化电晕放电式油烟净化器的实验研究

根据接地极雾化电晕放电的原理制造了一台油烟净化器,对雾化条件和非雾化条件下的伏-安特性曲线、油烟中颗粒物的净化效率和放电电流进行了研究。结果表明,无论是正电晕放电,还是负电晕放电,接地极雾化电晕放电的放电电流都大于非雾化电晕放电电流;流量过大或过小都不利于接地极雾化负电晕放电对油烟的净化;两种情况下的净化效率都随着风速的增加而降低;雾化电晕放电油烟净化器的净化效率和放电电流几乎不随工作时间发生变化,而非雾化条件下二者均随着工作时间的增加而逐渐减小。     

Environmentally friendly wooden-based coatings for thermal insulation: Design,manufacturing and performances

The design of an innovative protective and thermal insulating coating is investigated. The coating is composed of two superimposed layers; the innermost layer consists of dried beech dust dispersed in a diluted polyurethane binder, while the outermost layer is a conventional decorative hybrid epoxy-polyester powder coating. Each layer was sprayed on a metal substrate and baked at moderate temperature to consolidate the coatings and establish their full properties. The morphological features, mechanical response, protective and thermal insulating performance of the coatings were experimentally analysed by varying their structure and dried beech dust concentration in the binder. These coatings exhibit high potential in terms of thermal insulation and also show remarkable behaviour in terms of visual appearance, adhesion to the substrate and long lasting.     

新型醇基喷涂涂料在粘土湿型砂中的应用

论文介绍了粘土湿型砂铸造新型醇基喷涂涂料的组成结构、性能特点、应用实例和使用经验.粘土湿型砂铸造新型醇基喷涂涂料的主要性能达到了国内外同类产品领先水平;生产的高锰钢、可锻铸铁和灰口铸铁产品表面光洁,无粘砂、气孔等缺陷.     

筛板塔漏液点气速与喷射点气速的计算模型

从力平衡角度出发,考虑到筛板上气液混合层的截面含气率的影响,推导出筛板的漏液点与喷射点气速的计算模型,可用于工程设计计算。     

ML-300型助焊剂喷涂系统

介绍了一种新型助焊剂喷涂系统，利用该系统可对旧的发泡系统进行改造，列出了该系统的技术特征以及技术参数，并对改造后的PCB焊接效果进行了讨论。     

Liquid absorption capacity of carriers in the food technology

If a liquid should be sprayed on a powder that acts as a carrier, the Concentrated Powder Form (CPF) technology can be used. In the food industry, there is a large number of products available in powder form, which can be used as carriers for liquid components. But there is a big difference between them in view of the maximum liquid absorption capacity. To find out which attributes affect the liquid absorption capacity of these carriers, several natural substances and model particles with defined uniform diameter and spherical shape were loaded with increasing amounts of different liquids. The aim of this study is to find out more about the casual relationship between the characteristics of powders and liquids, as well as the loading capacity. Therefore, a correlation between the tapped density and the maximum loading capacity is discussed. To determine the maximum loading capacity, a simple method using a filter was developed.     

爆炸喷射沉积WC-Co涂层组织及显微硬度分析

分析测试了通过爆炸喷射沉积获得的ＷＣ－Ｃｏ／Ｍ基复合材料的微观组织结构及显微硬度。试验结果表明，爆炸喷射沉积层组织形态为粗大、彼此重叠的片层状；主要组成相为ＷＣ、Ｗ、Ｃｏ及少量的Ｗ２Ｃｏ经８００℃／２ｈ热处理之后，出现了原子迁移，组织进一步均匀，并形成了新相Ｃｏ３Ｗ３Ｃ。涂层的显微硬度随处理温度升高和Ｃｏ含量增加而降低，且具有明显的各向异性。     

用于喷涂设备的直流静电高压发生器的设计

通过对空气静电旋杯喷涂的分析研究,在已经市场化的设备基础上,设计了一种用于喷涂设备的直流静电高压发生器。设计表明进一步完善了设计要求。通过试验证明提高了EMI能力和减少了功耗,具有较好的保护性能。通过实际应用证明该发生器提高了设备的上漆率达85%以上,涂复率达90%以上,喷涂质量有所提高。还需进一步研究设计以便继续提高。     

氟碳清漆超临界CO2喷涂工艺的研究

本文测定了超临界CO2（SC-CO2）-氟碳清漆-稀释剂拟三元体系相图，用L9（34）正交表考察了温度、压力、CO2含量对含有超临界CO2涂料液雾化效果和喷雾锥角的影响．结果表明，当温度低于70℃、压力大于10MPa、CO2含量小于32％时均能使喷涂液处在稳定单相区，随着温度、压力和CO2含量的增大，雾化粒子变细，喷雾锥角变大．在14MPa、CO2含量32％（wt）和60℃下喷涂，其涂膜主要性能均达到了国家标准，喷涂过程VOC值降低了43．5％。