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介绍了GCY-450型内燃机车制动风源净化装置的加装改造原因、改造的方案以及改造效果,并提出将改造方案纳入该型新造内燃机车设计中的建议. 相似文献
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1故障情况 1997年11月10日,东风5型1407号机车在调车作业中,司机发现总风缸压力下降,于是启动空压机打风.但是,压力仍然下降,经检查发现,风源净化装置A塔电空阀排风孔大量排风不止.司机甩掉风源净化装置后机车恢复正常.由于在冬季,风源净化装置如果长时间不使用会损坏制动管路,因此,乘务员打电话向段里汇报故障情况,要求回段处理.10日下午,1407号机车返回段内.其后1183、1l8l、1182、1408号机车相继发生类似故障返回段内,到11月13日,库内外共积压5台东风5型机车,线上缺车,为此段里将此故障列为攻关项目,要求尽快解决. 相似文献
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为满足增压器的出厂检验试验及匹配优化要求,必须建立具有能够承担增压器检验验收试验要求的试验台。重点阐述了增压器试验台的独立风源选型。 相似文献
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针对DF4型机车机械式风源压力开关故障率高的现状,研制出电子式风源压力开关.重点介绍了电子式风源压力开关的结构与工作原理.实践证明,电子式风源压力开关完全满足机车运行需要. 相似文献
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通过空气透平级试验台,可研究试验级的效率与速比变化关系曲线、根顶部反动度与速比的变化关系曲线和级反动度、出口角度、出口速度、能量损失系数、级相对内效率等沿叶高分布等,并通过详细流场测试,研究不同叶型及不同流型对二次流的影响,进而研究叶栅通道内的流动损失。本文阐述了建立空气透平试验台所需风源的能力和试验级功率等的计算方法,并以600MW及1000MW机组的中压末级、高压末级作为模型试验级,计算了单级空气透平试验台所需风机的流量和压头,以及水力测功器的转速及测功范围。 相似文献
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针对DF4型机车机械式风源压力开关故障率高的现状,研制出电子式风源压力开关。重点介绍了电子式风源压力开关的结构与工作原理。实践证明,电子式风源压力开关完全满足机车运行需要。 相似文献
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Often full load testing of induction machines with outputs greater than 1 MW present difficulties when attempting to verify the rated performance, especially the temperature rise. This is because of limitations imposed by the manufacturer's power supplies and load equipment. The forward short circuit test, as an equivalent load test, is an alternate loading method which most manufacturers and service facilities could employ with a minimum capital expenditure. The theory of the method is described and temperature rise test results from a 1960 kW 4 pole machine are compared with test results obtained using several other test methods 相似文献
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《International Journal of Thermal Sciences》2007,46(7):717-725
In this study, a universal microcontroller test system, which is aimed to determine the dynamic parameters of thermoelectric modules, has been designed and realized using a novel test method. For the purpose of this work, the test system has been designed according to a more simplified form of the present formula set, which has been made to accept minimum variables as input to obtain more precise results. As a result, a test system, which can measure the dynamic parameters of a thermoelectric module universally by measuring only the hot side temperature, module operation voltage, module's current and thermoemf values of the module, has been produced. Also, the realized new test system has been used to measure a standard thermoelectric module (Melcor CP 1.4-127-10L) in order to verify its performance. 相似文献
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《International Journal of Hydrogen Energy》2019,44(58):30763-30771
A proper system must be applied in order to have reliable power production and higher levels of durability. The functions of this system are to fully utilize the benefits of the fuel cell components and to deliver the required power. This paper presents the design for an HT-PEMFC single-cell test cell with the development of a test station to operate the cell. The single-cell test cell and the real-time monitoring test station were designed using LabVIEW software, and were implemented using NI's cFP hardware devices, the details of which are provided. The architecture of the test station was aimed at measuring and controlling the mass flow rate, pressure and temperature of the reactant gases, and the stack temperature and current. An electronic load, with a quick dynamic response, was used to test the fuel cell reaction. The start-up, shutdown and monitoring functions were managed by the test station, which monitored the critical parameters of the fuel cell, namely, the voltage, current loading, generated power, hydrogen/air inlet and outlet and stack temperature. The results showed that the designed and developed single-cell HT-PEMFC and test station were able to generate power. An in-depth research needs to be conducted into the innovative design and development of HT-PEMFC systems since these are the key factors for optimum performance. 相似文献
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为研究汽油清洁剂对发动机喷油器头部积碳的影响规律,以聚醚胺、聚异丁烯胺和曼尼希碱3种汽油清洁剂为研究对象,在金属片积碳试验台架上试验研究其对汽油积碳的影响.对3种汽油清洁剂进行热重测试,在试验台架上对无清洁剂汽油和聚醚胺、聚异丁烯胺、曼尼希碱的质量分数分别为0.5‰和1.0‰的清洁剂汽油进行9个温度条件下的积碳试验,并... 相似文献
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1引言 测速发电机的输出特性,直接影响到电传动内燃机车的牵引特性,测速发电机一旦出现故障,极易发生机破.因此,在使用测速发电机励磁的电传动内燃机车中,无一例外,都采用了提高可靠性的冗余设计方案,即增加故障励磁电路,有的采用电器线路,有的采用电子线路.但是无论哪一种方案的故障励磁电路都是维持机车运行,机车恒功率牵引特性受到极大的影响.测速发电机故障不易查找,即使找到也难以处理.此类故障在机车运用中几乎无法处理,即使到段查找、处理也常常费时费力.所以提高测速发电机的检修质量,保证其在运用期内安全可靠工作,是非常重要的. 相似文献
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本文通过对摩托车成车加速性能、前后轮制动性能、车速里程表指示校核及前后轮定位精度试验台的检测试验原理分析,简述摩托车成车试验台的研制及使用方法. 相似文献
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介绍了故障电弧断路器(AFCI)测试平台的硬件和软件的构成,并利用实例对现有AFCI设备的故障电弧检测能力从反应时间、检测范围、检测精度等多个角度进行综合分析.分析结果表明,AFCI测试平台能够很好地对AFCI设备进行多角度的质量评价,同时能为AFCI设备投入实用奠定很好的基础. 相似文献
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单缸柴油机试验台的微机测试系统 总被引:1,自引:0,他引:1
试验台现代化是柴油机技术发展的一个重要组成部分,其中最显著的标志就是微机技术的应用。文章阐述了单缸柴油机试验台微机测试系统的测试原理和功能、系统的硬件和软件结构以及测试系统的特性。该系统是根据柴油机试验研究的实际要求而设计研制的,非常适合现场应用。 相似文献
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甘肃省节能产品质量监督检验站,于1998年4月经甘肃省技术监督局授权成立,主要从事对本省境内生产、销售的节能产品的质量监督检验工作。根据省局的统检计划,依据DB/G009-94、GB/T12915-91标准进行检测。两年内共检测真空管太阳热水器79台(套),在检测中,积累了一些经验,也发现了一些问题,在此提出几点供交流与探讨。1 太阳热水器型号混乱 检测的太阳热水器型号各式各样,为了便于管理,我们在企业送样过程中,发放了由我站统一印制的检验样品概况表,由受检单位填写交回,型号的编写五花八门。在末见… 相似文献