电空制动系统在大连轻轨列车上的应用

介绍了大连轻轨列车制动系统所采用的主要组成部件,针对各个部件的结构特点、工作原理及其在制动系统中所起的作用作了详细的介绍,着重阐述了大连轻轨列车在制动过程中所采用的各种制动方式,以及这些制动方式的控制原理、实施方法及其对车辆的制动所起到的不同作用。     

水轮机电气制动的制动力矩控制的研究

简述了水轮机电气制动原理,阐明了控制电气制动力矩的必要性,详细分析了电气制动力矩的控制理论,提出了电气制动力矩的变化及控制过程分为2个阶段的观点,并描绘了实施电气制动过程中制动电流和制动力矩随转速变化的特性曲线。     

排气制动专利(二)

正专利名称:一种发动机排气制动控制系统及控制方法申请号:CN201310412021公开号:CN103452676申请人:大连理工大学发明人:连静,李海波,李琳辉,周雅夫,黄海洋,王蒙蒙,化玉伟,孙永朝文摘:本发明公开了一种发动机排气控制系统及控制方法。本发明在排气制动自动开启控制过程中,在制动状态且离合器未分离时,控制单元采     

机车单元制动器制动工况监测系统的研究

介绍了机车单元制动器制动状态的监测方法,利用单片机 对象控制"的特点,说明控制对象有关参数获得方法和信号分析处理的基本过程。本监测系统通过实时采集制动时传感器的信号和机车运行的速度信号,分析判断机车运行情况,进而监测单元制动器的制动状态,在出现异常情况时给出相应的语音和信号显示。     

柴油机缸内压缩释放制动技术分析

本文阐述了目前柴油机制动技术中较为先进的缸内压缩释放制动技术,并对缸内压缩释放制动技术的受限因素及风险点进行了分析,为将来的设计、开发过程提供支持并提前预防。     

JZ-7型制动机空气制动与动力制动联合控制方案的设计

介绍了装备微机控制制动机的机车空气制动与动力制动联合控制的要求,以及现有装备JZ-7型制动机的机车空气制动与动力制动联合控制的现状。根据JZ-7型空气制动机的特点,设计开发控制电路,满足新的联合控制的要求。     

低速区列车牵引系统的电制动力提升控制方法

目前,我国列车牵引传动系统普遍采用电-空联合制动的制动方式,具有低速区电-空制动切换引起乘客舒适性下降、空气制动可控性不强和闸瓦磨损严重等缺点。为解决该问题,研究了一种基于再生制动和反接制动的列车全电制动控制技术,可实现列车在全速度范围内的电气制动。首先,根据矢量控制下电磁转矩和转差频率的关系,分析不同制动方式在低速区的转矩输出能力,确定了再生制动在定子角频率大于零和反接制动在定子角频率小于零时制动转矩的可控性;其次,通过间接矢量控制磁场定向和直接矢量控制磁链观测证明了反接制动的实现原理和可行性,进而提出了低速区由再生制动自然换向至反接制动的全电制动方案;最后,开展了小功率电机对拖试验测试,试验结果验证了所提制动策略可以实现低速区制动转矩的稳定可控输出,且转矩平滑无冲击,提升了低速区列车电气制动能力。     

DZD系列踏面制动单元在莱钢的运用情况

针对DF10D型机车制动单元在应用过程中所发生的问题进行了分析,并提出了相应的解决措施。     

HXD3A 型八轴交流传动电力机车空气制动系统

介绍 HXD3A 型八轴交流传动电力机车空气制动系统的主要构成，描述制动系统主要部件的功能，阐述制动系统逻辑工作原理。     

离心开关代替速度继电器控制可逆运行反接制动的研究

对电动机可逆运行反接制动控制电路在应用方面开展研究,以离心开关代替速度继电器控制可逆运行反接制动,实现了用简单的无方向性的开关控制有方向性的可逆运行反接制动,还详细分析了离心开关控制可逆运行反接制动工作过程。     

NS100GA-5型铁路起重机制动系统的提速改造

通过对NS100GA-5型铁路起重机制动系统的提速改造,研制出一种适合于铁路起重机的制动系统。对其改造方案、具体结构和计算分析进行了阐述。经过动力学试验,证明该制动系统能够满足提速的要求。     

A novel predictive power flow control strategy for hydrogen city rail train

Hydrogen-based vehicular traction has already reached a mature technological level and can replace the more polluting diesel engines. The adoption of this technology can also alleviate the carbon footprint issue of the rail trains running on non-electrified lines.This study presents a model and a numerical performance analysis of an electric hybrid train in an urban context. The train uses hydrogen as fuel and operates over non-electrified lines with zero local emission.The electric traction motors of the train are fed by a hybrid power unit consisting of several hydrogen fuel cell stacks operating independently in on/off mode and a set of flywheel energy storage devices.Each component of the power train is modeled separately and its operating limits are chosen on the base of technical literature.An innovative predictive logic to manage power flows is defined and proposed with the aim to minimize the fuel consumption. Furthermore, this approach uses a regenerative electrical braking and eliminates dissipative devices, like rheostats, which are commonly utilized onboard electric trains.This predictive approach is based on the optimal management of the power unit components according to the advanced knowledge of the data of the rail vehicle, the characteristics of path, drive cycle and payload for an established route.The fuel cell stacks operate accordingly to the average traction power requirement in each railway line section, whereas the flywheel energy storage system manages the dynamic power.A parametric model of the system and a respective software tool have been developed; this implementation, that incorporates many tunable parameters of the train and rail path, is able to simulate the rail train operating on a specific railway path by implementing the novel control strategy.An existing single track non-electrified line, designed again for urban service, has been selected as a case study to evaluate the performance of the proposed system.The specific fuel consumptions obtained with the novel control strategy and with a single fuel cell system operating at constant power are compared under the same operating conditions.The results highlight that significant fuel savings can be achieved.     

轻轨车辆车内噪声的研究

通过对我国轻轨车辆进行车内噪声测试可知,轻轨车辆车内噪声中低频突出,噪声大小随空间位置的不同而不同;列车运行速度及车辆辅助设备运转对车内噪声有着不同程度的影响。还对降噪措施进行了研究和探讨。     

城轨车辆试验专用线设计实施

着重介绍了大连机车车辆有限公司厂区内的城市轨道车辆试验专用线的设计实施。该试验线的建成使大连机车车辆有限公司具备了对城轨车辆进行动力学试验的能力,为城市轨道车辆今后的设计研发提供数据支持和良好的试验平台。     

GCD-470型重型轨道车

介绍了新型电传动重型轨道车的总体布置、主要技术参数、动力装置、传动系统、车体、制动系统、走行部、型式试验及考核运行等。     

Sector coupling potential of wind-based hydrogen production and fuel cell train operation in regional rail transport in Berlin and Brandenburg

As the transport sector is ought to be decarbonized, fuel-cell-powered trains are a viable zero-tailpipe technology alternative to the widely employed diesel multiple units in regional railway service on non-electrified tracks. Carbon-free hydrogen can be provided by water-electrolysis from renewable energies. In this study we introduce an approach to assess the potential of wind-based hydrogen for use in adjacent regional rail transport by applying a GIS approach in conjunction with a site-level cost model. In Brandenburg about 10.1 million train-km annually could be switched to fuel cell electric train operation. This relates to a diesel consumption of appr. 9.5 million liters today. If fuel cell trains would be employed, that translated to 2198 annual tons hydrogen annually. At favorable sites hydrogen costs of approx. 6.40 €/kg - including costs of hydrogen refueling stations - could be achieved. Making excess hydrogen available for other consumers, would further decrease hydrogen production costs.     

290型轨道车换向分动箱的设计

290型轨道车为常见的轨道工程车辆,换向分动箱是轨道车传动系统不可或缺的装置,传统的液力换向传动箱机构复杂、成本偏高。本设计采用汽车机械传动箱技术研制机械换向分动箱,以较高的性价比实现轨道车的传动。介绍了290型轨道车机械换向分动箱的主要结构特点。     

抗闸瓦偏磨的新型机车踏面单元制动器的研制

针对DF4DD型机车装备的DZD型踏面单元制动器频繁发生的闸瓦偏磨问题,对DZD型踏面单元制动器进行改型设计。开发出一种抗闸瓦偏磨的新型机车踏面单元制动器,彻底解决了原有闸瓦偏磨问题,提高了机车的运行可靠性,降低了总体运营成本。     

GCY300型轨道车车体强度分析

GCY300型轨道车主要用于铁路巡检、救援、线路维修及施工作业。介绍了该型轨道车车体结构特点,并对该车体钢结构进行了多种运行工况下的强度分析。计算结果表明,该车体钢结构的刚度和强度满足相关标准要求。