浅谈汽车涂装新型漆雾分离技术应用

目前汽车涂装工厂大多采用文丘里湿式喷房或干式喷房(石灰式捕捉),湿式喷房文丘里漆雾处理装置配合专门的循环水池、循环管路系统以及刮渣系统来达到处理漆雾的效果。但是这种方法存在如下问题:常规的湿式喷房需要有专门的水池,设备运行过程中需要消耗大量的水,还需要添加各种化学药剂,能耗高,运行成本高,最后漆渣还需要作为危废进行处理;循环风湿度大,需要消耗大量的能量来维持送风的温湿度;工作时漆泥处理间噪音大,气味难闻,劳动条件差。干式喷房(石灰式捕捉)固废处理成本高。     

利用高速摄影研究二甲基醚的喷雾特性

本文利用高速摄影技术在定容压力室中，通过6孔电磁喷射器，研究了二甲基醚（DME）的喷雾特性。结果表明，二甲基醚的喷雾射程随着定容压力室内气体压力的增加而减少；喷雾锥角则随和的升高而增大，在相同的条件下，二甲基 喷射锥角大于 喷射锥角；喷雾射程则低于柴油的喷雾射程。Hiroyasu喷雾射程的计算模型，通过适当的系数修正可以用于DME喷雾射程预测，由于DME喷雾射程和着火延迟期都比柴油短，在屐机缸内着火时刻，柴油的喷雾射程约为DME的2倍，从高速摄影的喷雾影像中可以清楚的看到，DME的蒸发速度明显比柴油快。     

燃油喷雾PIV测试方法研究

本文使用美国TSI公司的PIV(ParticleImageVelocimetry)设备,对电控高压共轨燃油喷射系统在3个不同的喷射压力(80MPa,100MPa,110MPa)下的燃油喷雾进行了测试,获得了喷雾图像,并对喷雾测试过程中的各种参数设置以及一些问题做了详细分析。     

铁路喷漆作业混苯治理措施的研究

铁路喷漆作业现场及喷漆作业过程中散发在空气中的有机废气［挥发的溶剂（酯、酮、醇类）及稀释剂（煤焦油类、苯、甲苯、二甲苯）］及固体漆雾粒子（树脂、颜染料）。依据国内外各行业喷漆技术发展的动向，找到了解决铁路机务段、车辆段及铁路工厂喷漆作业混苯物污染的控制手段。即：改革工艺采用新技术和新材料，实施上送风下排风空气幕及实施净化措施和加强个体防护的综合治理措施。     

用热喷涂层防止锰铜合金螺旋桨腐蚀的研究

对锰铜合金螺旋桨表现热涂涂层的性能进行了试验，并对采用热喷涂涂层防止螺旋桨腐蚀的可行性进行了研究。试验结果表明：采用高速氧燃料喷涂技术形成的Ｃｕ９５超涂层人有优良的耐空蚀，耐海水腐蚀性能，可作为锰铜系合金螺旋桨表面的防腐涂层。     

Experimental investigation of characteristics of pressure modulation in a fuel injection system

A piezoelectric atomization device achieves fuel pressure modulation through vibration of a piezoelectric pressure modulator. As a consequence, the fast alternating and slow moving streams collide with each other and further break up the fuel drop. In this paper, an experimental investigation was carried out to study the fluid dynamic characteristics of the spray atomization process of automotive port fuel injectors with a piezoelectric pressure modulator. The investigation mainly focuses on: (a) the coupling characteristics between the piezoelectric stack and the hydraulic as well as the transfer characteristics of pressure modulation from the piezoelectric modulator to the point above the orifice; (b) the time history of the pressure dynamic response at the point above the orifice under a typical modulation frequency, which reflects the variation of pressure modulation while the fuel injector is working; and (c) the time-variation characteristics related to mechanical structure and fluid dynamics. The experimental results expose some important dynamic characteristics of pressure modulation, which will be very significant and lead us to greatly improve the fuel injection system, optimize the control parameters and implement spray atomization with a high quality performance in the near future.     

庐山西海高速公路植被护坡技术应用研究

文章结合庐山西海高速公路边坡坡面防护工程实例,介绍了客土喷播植生技术、液压喷播＋人工栽植苗木技术这两种近自然型边坡保护技术的特点与施工方法,并评述了近自然型边坡保护技术应用的效果。     

新型一次成膜轨迹设计方法在2K清漆喷涂上的研究及应用

为了减少2K清漆喷涂耗量,提升喷涂涂着效率,某生产基地涂装车间2K清漆喷涂线上开发应用了一套新型一次成膜轨迹设计方法.通过对雾化器静电喷涂的涂着效率进行理论研究和喷涂测试,设计出最优的轨迹和喷涂参数.结合现场实车喷涂验证,相同外观和漆膜厚度下,2K清漆采用新一次成膜喷涂相比传统二次成膜单车耗量显著降低.     

Experimental study on macroscopic spray characteristics after impingement in a slit-type GDI injector

In this paper, an experimental study on the wall-impinging spray of the slit-type GDI injector is presented. To examine the effects of various factors on the development of a spray impinging on the wall, experiments were conducted at various injection pressures, ambient pressures, wall distances from the injector tip, wall temperatures, and wall inclination angles. Behavior of the impinging spray was visualized using a planar laser scattering method. It is shown that the spray path penetration of the wall-impinging spray increases with increases in injection pressure, wall distance, wall temperature, or wall angle. On the other hand, the spray path penetration of the wall-impinging spray decreases with increases in ambient pressure. The predicted spray path penetration calculated by the empirical equation estimates the spray path penetration in all cases, and the empirical equation is optimized for the total injection pressure.     

Effects of intake flow on the spray structure of a multi-hole injector in a DISI engine

The spray characteristics of a 6-hole injector were examined in a single cylinder optical direct injection spark ignition engine. The effects of injection timing, in-cylinder charge motion, fuel injection pressure, and coolant temperature were investigated using the 2-dimensional Mie scattering technique. It was confirmed that the in-cylinder charge motion played a major role in the fuel spray distribution during the induction stroke while injection timing had to be carefully considered at high injection pressures during the compression stroke to prevent spray impingement on the piston.