内燃机进气粗滤器的试验研究

本文概述了帽式粗滤器、盆式粗滤器、切向进气式粗滤器、叶片环式粗滤器、旋流管式粗滤器等空气粗滤器的种类和工作原理,并对各粗滤器的性能进行了实验室性能试验和研究,利用实验室的模拟试验及分析结果,为提高粗滤效率,延长空滤器保养周期和使用寿命、避免内燃机的早磨问题的解决提供了可行性较强的设计方案和建议,为专业人员的设计与选择提供了一个参考。     

一种直通旋流式粗滤器的改进

本文对一种直通旋流式粗滤器进行结构改进,该粗滤器主要应用于汽车进气系统。它与原有结构相比,拥有更大的额定流量,而流阻和粗率效率与原状态相比,相差不大。本文的设计过程可以为其他流量段的粗滤器设计提供参考。     

双联可切换燃油粗滤器的研制与运用

针对DFa型机车柴油机燃油系统燃油压力低故障频繁发生的问题,在分析其原因的基础上,研制了双联可切换燃油粗滤器。该粗滤器具有通用性好、过滤效率高、使用寿命长、环保性能好和故障切换方便等特点,并在运用中取得了良好效果。     

发电机定子接地微机保护装置的研制及试验

本文介绍了自调整式的发电机定子接地微机保护装置的研制及其动摸试验结果，着重介绍了保护装置的硬件结构和软件结构及其主要功能，以及保护装置的可靠性和抗干扰性能，从动模实验上证明了自调整式的发电机定子接地微机保护装置的优良性能，为保护装置的推广应用提供了条件。     

空气滤清器的设计与计算

本文的题目较大,不可能面面具到详尽论述,作为发动机进气系统,只是其中的一环,本文打算作为《柴油机卡车进气系统的设计及技术条件的确定》一文的姊妹篇。文中提出了空滤设计的前提条件,分别叙述了盆形粗滤器、叶片环、旋流管等各种粗滤器的结构计算;对油浴式空滤器,干式纸质空滤器设计做了介绍,文中列出了有关的标准数据的图表。     

高压闸门压紧式止水试验研究

对我国近年来研制的高压闸门压紧式系列上水装置进行试验研究，通过实验，对不同压紧式止水断面及所选用材料进行对比分析，探讨了压紧式止水的止水性能，为工程设计提供参考依据。     

WD615发动机起动困难的故障诊断与排除

WD615系列发动机燃油供给系布置在发动机的左侧，主要由燃油箱、燃油集滤器、燃油输油泵、柴油滤清器(粗、细)、高压油泵、喷油器、高低压燃油管及柴油回油管等组成。燃油滤清器是双级串联，粗滤器为毛毡滤芯，精滤器为纸质滤芯，二者同装在一个滤清器座上。在车架上装有燃油集滤器(粗滤器)，其金属网状滤芯过滤燃油中较大的颗粒、杂质，底部有排污旋     

共轨柴油机低压油路的自动排气研究

针对电控高压共轨柴油机因低压油路存气导致发动机起动困难问题,设计制作不同结构形式的低压燃油系统自动排气方案,并对方案进行试验验证。结果表明:粗滤器上带排气孔可有效排出粗滤中的空气,在输油泵后的精滤器上增加排气单向阀,能够排出精滤器中的空气,较好地提高柴油机起动性能。     

大型电站锅炉SCR脱硝系统催化剂活性修正方法

提出了一种大型电站锅炉SCR脱硝系统催化剂活性的修正方法.首先在实验室进行催化剂活性的测量,然后利用现场性能试验获得的SCR反应器真实脱硝性能对实验室测得的催化剂活性进行修正.结果表明:该方法真实地反映了现场催化剂活性,为提高催化剂和反应器性能计算准确度以及提高催化剂更新方案评估可靠性提供了一种新的技术手段.     

单轴燃气-蒸汽联合循环机组热力性能模拟计算软件的开发

本文针对某电厂单轴燃气轮机联合循环发电机组，进行了发电工况和供热工况的热力性能诊断试验，在试验的基础上编制了热力性能模拟计算软件，用于机组整机和各设备的热力性能的诊断。该软件为电厂独立进行热力性能诊断试验、分析各部分性能发展趋势、准确掌握机组日常运行状况及机组部件的老化情况提供了手段，同时也为今后单轴布置方式的联合循环机组考核试验方法及标准的制定提供了参考。     

空气滤清器粗滤器的应用与设计

介绍空气滤清器粗滤器的种类和特点,并结合实例进行叶片环的设计     

Fuel cell cathode air filters: Methodologies for design and optimization

Proton exchange membrane (PEM) fuel cells experience performance degradation, such as reduction in efficiency and life, as a result of poisoning of platinum catalysts by airborne contaminants. Research on these contaminant effects suggests that the best possible solution to allowing fuel cells to operate in contaminated environments is by filtration of the harmful contaminants from the cathode air. A cathode air filter design methodology was created that connects properties of cathode air stream, filter design options, and filter footprint, to a set of adsorptive filter parameters that must be optimized to efficiently operate the fuel cell. Filter optimization requires a study of the trade off between two causal factors of power loss: first, a reduction in power production due to poisoning of the platinum catalyst by chemical contaminants and second, an increase in power requirements to operate the air compressor with a larger pressure drop from additional contaminant filtration. The design methodology was successfully applied to a 1.2 kW fuel cell using a programmable algorithm and predictions were made about the relationships between inlet concentration, breakthrough time, filter design, pressure drop, and compressor power requirements.     

An air filter pressure loss model for fan energy calculation in air handling units

Air filters consume a significant part of the fan power in air handling systems. Due to lack of suitable models, the fan energy associated with the filter pressure drop is often estimated based on average airflow and average pressure drop across the filter. Since the pressure drop varies nonlinearly with airflow and the filter resistance varies with dirt build‐up, current methods often produce erroneous results. This paper presents a new air filter pressure loss model that has been developed and verified using experimental data. The model projects the pressure losses across the filter for both constant and variable airflows. The inputs to the model are the airflow rate, the time of use, the initial design and final pressure losses at the design flow rate, and the coefficient of a power law regression of pressure loss as a function of airflow rate. The air filter pressure loss model may be implemented in hourly building energy simulation programs that perform hourly simulation at the air handling unit level. Copyright © 2003 John Wiley & Sons, Ltd.     

防风沙型内燃机车空气滤清器

从提高柴油机的进气质量、减少活塞等部件的非正常磨损入手 ,提出了防风沙型空气滤清器的设计方案 ,并对其可行性进行了对比论证。得出结论 :防风沙型空气滤清器能满足机车的使用需要 ,特别适合在北方风沙大的地区推广使用。     

小型双缸柴油机进气动力现象的试验研究

本文通过对SD2100型柴油机进气管中压力波的测量和进气性能的试验与分析,探讨了进气管长度、歧管结构型式和空气滤清器诸因素对充气效率和进气压力波的影响,并通过计算机模拟计算,提出了关于双缸柴油机进气系统的改进建议。     

Structure simulation design of a cathode air filter for SO2 contamination on a 7 kW fuel cell sightseeing vehicle

Proton exchange membrane (PEM) fuel cell stacks can be severely poisoned by a trace amount of SO₂ in the atmosphere, making it necessary to install an air filter to remove harmful contaminants from the cathode air. This study utilizes Computational Fluid Dynamics (CFD) to investigate the influence of the diverse filter structure design containing combinations of inlet diversion tube length and outlet deflector shape on the hydrodynamics and adsorption performance of a cathode air filter by Fluent. Simulation results show that the air filter performance is enhanced with decreases in diversion tube length. Compared with the horizontal porous plate, the conical one increases the pressure drop and the SO₂ adsorption dead zone area. Besides, an air filter prototype made based on the simulation results was applied to a 7 kW fuel cell sightseeing vehicle for the field test. The maximum voltage value of the stack is 73.1 V, the minimum is 67.6 V, and the maximum difference is 5.5 V when the fuel cell sightseeing vehicle runs at a constant speed of 20 km/h 77% of the voltage value is stable between 69 and 71 V, which proves the stable operation of the stack.     

进气系统设计方法探讨

介绍功能主义设计和设计硬点的思想,提出以功能驱动的硬点结构设计方法,并通过此方法对进气系统的结构设计进行分析。着重分析空气滤清器在客车上的布置和进气系统管路的设计,得到相应的设计准则和设计硬点,为进气系统设计提供了思路方法和理论依据。     

风沙地区空气滤清系统的研究

分析了机车原空气滤清系统在风沙地区运用存在的弊端和缺陷,介绍了风沙地区空气滤清系统改造的思路、结构特点、性能测试和使用效果。     

强制风冷柴油机冷却系统设计

本文采用CFD数值计算方法辅助风冷发动机冷却系统设计。设计时,首先采用经验方式确定发动机需求的冷却风量及散热功率,并初步确定散热肋片的设计方案;然后,依据CFD计算,考察肋片设计是否合理并根据认定合理的肋片结构确定冷却风道的阻力流量关系,依据这个关系选取风扇;最后在完整设计方案满足CFD计算的前提下,对设计方案进行台架试验。结果表明,理论计算及数值模拟相结合的方式能很好的应用到风冷发动机冷却系统设计中去。