共查询到19条相似文献，搜索用时 250 毫秒
1.
骆伟涛 《石家庄铁路工程职业技术学院学报》2014,(4):51-53
随着我国铁路运输事业飞速发展的全新开展,高速动车组以其安全、准时、快速、舒适、节能、环保等诸多优点被广泛推广运行。高速动车组是在现代科学技术的基础上发展起来的,同时也带动并促进科学技术发展,动车组各部件大量运用高新技术,特别是在转向架结构、车体轻量化、列车动力分配、电传动控制技术、列车信息网络及制动系统都具有各自的高科技含量。 相似文献
2.
谢庆华 《石家庄铁路职业技术学院学报》2019,(2):60-65
空气制动仍是目前我国普速列车制动方式的主体,对于高速列车,自动式电空制动系统中电能传送的只是开始和停止空气分配阀动作的信号,制动管空气压力仍由制动管通过压力空气传送。对列车制动系统的分类和工作原理及故障处理的研究,具有重大意义。对于空气制动系统,存在最多的故障就是泄漏,文中先介绍了制动系统中常见泄漏故障和简单处理方法,然后阐述了管路压力的快速查看方法及试验标准。 相似文献
3.
高速列车刹车片检修工艺的分析 总被引：1，自引：0，他引：1
徐汇音 《实验室研究与探索》2012,31(5):58-60,205
高速列车中的刹车片是制动系统的重要组成部分,对制动性能起着举足轻重的作用,刹车片是通过与车轮的摩擦实现制动,其材料应具有耐热性强、磨损量小、摩擦系数高、机械强度高等特点.在列车运行中刹车片的磨损严重,整修量及需求量很大.通过对刹车片的结构及运行情况的阐述,分析了刹车片的检修工艺,提出了完善刹车片的整修工艺、材料研制及改善的技术创新方向. 相似文献
4.
车钩用于链接车辆与车辆或列车与列车是保障动车组安全、正点、稳定运行的关键部件之一;安装在动车组头尾车前罩内的自动密接式车钩,在两列动车组重联运行时,能够实现动车组与动车组之间的机械、电路和气路的自动连接。以CRH2A(统型)动车组为例,介绍了动车组车钩的结构与功能,分析了车钩重联失败的原因,提出了日常维护注意事项和处理措施,对提高动车组车钩运用质量,保证动车组列车安全平稳运行,维护高速铁路正常运输组织秩序都具有重要意义。 相似文献
5.
我国高速客运专线采用多种速度的列车共线运行的运输组织模式,在高速度、高密度的行车条件下,综合维修天窗开设方式的确定,对客运专线的通过能力,行车组织方式有很大的影响,是我国高速客运专线发展和建设过程亟待解决的重要问题. 相似文献
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高速列车的"门槛"是指列车最高时速达到或超过200公里。高速列车跑得快,既需要有大功率的牵引动力,也要求列车又轻又稳。由于列车阻力与速度相关,所以要采用流线型车体等一系列减少阻力的措施。另外,列车还要能及时停下来,因此高速列车不像普通列车那样依靠闸瓦与车轮摩擦来制动,而要采用先进的综合制动手段。 相似文献
9.
高速列车的＂门槛＂是指列车最高时速达到或超过200公里。高速列车跑得快,既需要有大功率的牵引动力,也要求列车又轻又稳。由于列车阻力与速度相关,所以要采用流线型车体等一系列减少阻力的措施。另外,列车还要能及时停下来,因此高速列车不像普通列车那样依靠闸瓦与车轮摩擦来制动,而要采用先进的综合制动手段。 相似文献
10.
王超 《洛阳工业高等专科学校学报》2015,(2)
主要介绍了地铁车辆的两个评价指标：稳定性和舒适度。列车纵向冲动是列车运行质量的关键影响因素,分析了列车减速度和纵向冲击率对于稳定性和舒适度的影响。研究地铁列车制动减速度与列车冲击率之间的关系,提出了针对地铁制动系统空气制动和复合制动的制动控制方法,通过优化制动控制策略提高了稳定性和舒适度。 相似文献
11.
When aerodynamic braking works, the braking wings can change the flow field around the train, which may impact on the comfort
and safety. Based on a sliding mesh, the pressure wave and flow field around high-speed trains with aerodynamic braking are
analyzed. By comparing three typical intersection situations, the pressure wave of a high-speed train during braking (with
or without aerodynamic braking) is studied. The analyses indicate that the pressure wave around the high-speed train body
will change while using the aerodynamic braking, causing several pressure pulses on the surface of crossing high-speed trains.
The distances between the pressure pulses are equal to the longitudinal distances of the brake wings, but the magnitudes of
the fluctuations are less than those induced by the head of crossing trains. During the crossing, a train without aerodynamic
braking will not impact the crossing train. 相似文献
12.
Compared to the current eddy braking patterns using a single magnetic source, hybrid excitation rail eddy brakes have many
advantages, such as controllability, energy saving, and various operating models. Considering the large braking power consumption
of the high-speed train, a hybrid excitation rail eddy brake system, which is based on the principle of electromagnetic field,
is proposed to fulfill the needs of safety and reliability. Then the working processes of the mechanical lifting system and
electromagnetic system are demonstrated. With the electromagnetic system analyzed using the finite element method, the factors
such as speed, air gap, and exciting current have influences on the braking force and attractive force. At last, the structure
optimization of the brake system is discussed. 相似文献
13.
The China’s high-speed railway is experiencing a rapid growth. Its operating mileage and the number of operating trains will
exceed 45 000 km and 1500 trains by 2015, respectively. During the long range and constant high-speed operation, the high-speed
trains have extremely complex and varied work conditions. Such a situation creates a huge demand for high-speed train on-board
monitoring. In this paper, architecture for high-speed train on-board monitoring sensor network is proposed. This architecture
is designed to achieve the goals of reliable sensing, scalable data transporting, and easy management. The three design goals
are realized separately. The reliable sensing is achieved by deploying redundant sensor nodes in the same components. Then
a hierarchal transporting scheme is involved to meet the second goal. Finally, an electronic-tag based addressing method is
introduced to solve the management problem. 相似文献
14.
With the development of high-speed railways in China, more than 2000 high-speed trains will be put into use. Safety and efficiency
of railway transportation is increasingly important. We have designed a high availability quadruple vital computer (HAQVC)
system based on the analysis of the architecture of the traditional double 2-out-of-2 system and 2-out-of-3 system. The HAQVC
system is a system with high availability and safety, with prominent characteristics such as fire-new internal architecture,
high efficiency, reliable data interaction mechanism, and operation state change mechanism. The hardware of the vital CPU
is based on ARM7 with the real-time embedded safe operation system (ES-OS). The Markov modeling method is designed to evaluate
the reliability, availability, maintainability, and safety (RAMS) of the system. In this paper, we demonstrate that the HAQVC
system is more reliable than the all voting triple modular redundancy (AVTMR) system and double 2-out-of-2 system. Thus, the
design can be used for a specific application system, such as an airplane or high-speed railway system. 相似文献
15.
熊惠平 《宁波职业技术学院学报》2007,11(1):55-57
追踪“微笑曲线”的优化路径,无论是发展高科技产业还是先进制造业,都有赖于人才及人才培养体系的强力支撑;高职教育在其中的性质和功能定位,决定了其在培养创新型高技能人才、操作型高技能人才以及在农民工培训中的优势作用。 相似文献
16.
In this study, we present a thermal optimization method using the overall lumped parameter (LP) and partial computational fluid dynamics (CFD) modeling for a 600-kW permanent magnet traction motor developed for high-speed trains. The motor is totally enclosed forced ventilated to achieve high power density, high efficiency, and low maintenance requirements. Considering the electro-magnetic performance, bogie space, and thermal capacity, we propose a ventilation structure with zigzag plates in sector cross-section. We focus particularly on the ventilation channels and propose an overall LP model for thermal optimization, in which the full consideration of the influence of turbulent flow is given by using a partial CFD model. Given the specific critical parameters from the optimization results, we present a complete 3D CFD model of the whole motor to obtain an accurate temperature distribution and the maximum temperature rises in local points. The benefit of zigzag plates is studied extensively using both the LP and the complete CFD models and the results are verified by equivalent thermal experiments under rated operations. Experimental results indicate that the ventilation structure fulfills the normal operational demands of high-speed trains by improving thermal performance by more than 15%. Additionally, we propose an engineering method to estimate iron loss constraint with the complete CFD model to guide the control system design. 相似文献
17.
新型客车制动、电气装置教学系统融微机控制的实物系统和多媒体教学系统于一体，将感性认识较强的实物教学系统和色彩丰富、引人入胜的多媒体有机结合，取得了较理想的培训效果。 相似文献
18.
针对降低纯电驱动汽车能耗的问题,以纯电驱动汽车为对象,阐述了再生制动原理,指出再生制动技术对于电动汽车发展的必要性．介绍了再生制动技术,对电动汽车再生制动系统中的储能方式进行了分类与优缺点综述．针对不同电动汽车的运行工况,对再生制动进行了分类,分析了几种典型的再生制动控制策略和实现方法,以及每种控制策略对能量回收的利用率． 相似文献
19.
高速铁道车辆风致安全性研究 总被引：1，自引：0，他引：1
Xin-biao XIAO Liang LING Jia-yang XIONG Li ZHOU Xue-song JIN 《浙江大学学报(A卷英文版)》2014,15(9):694-710
研究目的：随着世界高速铁路网的不断扩张,高速列车的风致安全性成为高速铁路系统中的关键科学问题之一。本文利用车辆-轨道耦合动力学理论分析方法,确定强横风作用下高速铁道车辆的安全运行区域,为强风地带高速列车的安全控制提供依据。创新要点：首次提出了考虑多种影响因素和脱轨评价指标的高速列车脱轨安全域分析方法,并运用到了高速铁道车辆风致安全性研究中。研究方法：基于车辆-轨道耦合动态响应及多种安全性评价指标得到横风作用下高速铁道车辆的安全运行区域和脱轨区域。重要结论：铁道车辆安全性评价指标中,轮重减载率对横风激励最为敏感,其确定了强风作用下高速车辆安全运行区域的边界。 相似文献