内燃机车液力传动箱变扭器检修翻转台

根据液力传动箱变扭器的结构特点设计制作的变扭器检修翻转台,可使变扭器检修操作简单、快速、安全,从而降低检修人员劳动强度,大幅度提高机车检修效率.     

机车新型空调电源系统的设计

根据机车变频空调的特点,设计了满足内燃、电力机车应用的空调电源系统,包括主电路结构、工作原理、控制系统硬件及软件等,突出了与空调机组一体化设计、节能、变频运行、智能控制等特点.设计方案取得了实验验证,样机满足机车运用要求.     

机车空调电源地面试验检测装置

阐述了机车空调系统地面试验检测装置的设计背景,详细介绍了装置的主要性能、电路设计及其主要设备.     

内燃机车逐步实现"状态修"的探讨

随着机车的更新换代及其配件质量的提高,机车使用寿命相对延长。1993年在这个基础上根据DF4型机车的实际状态实行弹性公里检修,延长了走行公里数,降低了检修率,为1993年铁道部修改段修规程创造了条件。除延长了走行公里外,还减少了检修范围和延长了机油更换周期,同时通过科技兴路,不断完善检测手段,加强了机车主要部件的检测,积累了检测数据,为机车实现状态修打下基础。     

DF7G模块化机车司机室的空调设计

通过计算分析以前DF7型机车司机室通风系统存在的缺欠,提出了DF7G型机车司机室空调系统新的设计理念。通过改进风道设计等,使DF7G型机车司机室空调系统通风得到改善,实际运用表明效果良好。     

铁路机车轮对综合参数自动检测系统

针对铁路机车轮对检修的要求,研制了机车轮对综合参数自动检测系统,该系统能完成对轮缘磨耗、踏面磨耗、踏面擦伤等重要参数的自动测量,从而提高了机车轮对检测的自动化程度及轮对检修作业的效率.     

浅谈内燃机车空调制冷弱的原因及处理

针对内燃机车空调在运用过程中遇到的制冷弱问题进行研究与分析，找出了问题的原因并加以积极预防，进一步提高了机车空调检修水平，缩短了机车临修停时，提高了机车运用率。     

机务段机车检修质量管理信息系统

1引言实行机车检修生产、检修质量管理的微机化管理,建立机车检修质量信息系统,不仅可以减轻各级管理者的工作强度,而且还可以通过微机管理让机车检修生产、检修质量管理更加规范化,提高管理质量,提高机车检修效率和检修效益。这是企业现代化管理的需要,也是机务系统未来利益保     

机车检修修制的改进

1概述 列车提速、长大列车开行、机车长交路轮乘制后,现行机车检修修制的不合理性已凸显出来:运用机车紧张与机车日勤检修方式形成反差,待修机车"车等人"的现象普遍存在,导致机车检修率、段修率、检修停时等指标居高不下.机车检修仍沿袭蒸汽机车时期"计划预防修"的方式,机车检测的作用没有充分发挥,过剩维修、延误维修的问题依然存在.我们针对列车提速、机车长交路等新形势下可能带来的新问题,通过对机车小、辅修制度的改革探索,有效地保障了机车运用质量,提高了运用效率.     

机车空调系统泄漏的原因及检修

为改善机车司乘人员的工作条件,降低事故发生率,我国铁路正逐步为内燃机车和电力机车配备空调机组,由于机车空调要承受列车运行中频繁的冲击与振动,所以其故障发生率远远高于地面固定的制冷与空调设备.因而机车空调的运用与检修已成为机务部门的一项新的作业内容.本文将对制冷系统泄露的原因及检修进行分析,以供参考.     

Areal evolution of PV systems

If a large amount of the future penetration of PV systems is imaged, it is likely that they densely concentrate in a certain area. It may not be a simple aggregation of individually optimized system, but a different system image may result by the total optimization of an area. The author frames this new question as the problem of “Areal Evolution” or “PV-AREA”. The following two cases are dealt with and their concrete concepts are given: (1) PV systems for community, (2) global-scale utilization of PV systems.     

HS-510型发动机的改进设计

本文介绍了HS—510型发动机的改进过程。通过改进使其功率提高和燃油经济性改善。同时也说明一个产品只有不断地改进和完善，才能满足社会进发展的需要。     

1台1 025 t/h液态排渣锅炉的设计和运行特点

介绍了1台1025t/h液态排渣锅炉汽水系统、燃烧系统和控制系统等设计和运行的若干特点,对国内同类型锅炉的设计和运行具有指导意义。     

计算机辅助计量管理系统

计算机辅助管理系统研制开发的必要性以及国内外概况,并对系统开发的最终目标、功能及其意义进行了阐述.     

光伏系统蓄电池组不均衡性的故障分析及排除

蓄电池组是光伏系统的重要设备,其故障往往导致光伏系统不能正常运行。光伏系统蓄电池组的故障多数因其不均衡所致。文章分析了蓄电池组因不均衡性导致的故障,提出了故障预防措施和故障排除方法。     

Operation strategy of residential centralized photovoltaic system in remote areas

Photovoltaic (PV) systems have found fairly wide application in remote isolated area. However, each individual PV system usually supplies energy only to one consumer. In such a case we have several consumers that each one of them uses a stand-alone PV system. This situation would expose such stand-alone systems to transient excessive loads larger than the power generated by the PVs, and then the battery is bound to discharge even during the day. For overcoming this problem, we suggest an autonomous centralized PV system, comprising one battery bank and plural subsystems connected to each other. From solar radiation data and load profiles, the performance of the PV centralized system is simulated by using a time step scheme. The advantages of this system are found to be the large charging rate of power, high efficiency, and low cost compared with conventional individual PV systems and hybrid systems. In addition, the economic study shows that the life cycle cost and the price of kilowatt hour generated in the centralized system is lower than that for the individual systems.     

板坯连铸机冷却水系统的完善与应用

针对北方某厂板坯连铸机生产状况，对其软水冷却系统、设备净环水冷却系统和二次喷淋浊环水冷却系统进行了研究分析，提出了冷却水系统的完善方案，解决了连铸水系统的稳定性，避免了频繁开停泵对连铸水系统高压电机的冲击及冬季长时间停机或检修造成设备和管道系统内部滞水而冻结，提高了事故处理的灵活性和环境适应性。     

Sustainable electricity generation for rural and peri-urban populations of sub-Saharan Africa: The “flexy-energy” concept

Access to energy is known as a key issue for poverty reduction. Electrification rate of sub-Saharan countries is one of the lowest among the developing countries. However, this part of the world has natural energy resources that could help raising its access to energy, then its economic development. An original “flexy-energy” concept of hybrid solar PV/diesel/biofuel power plant, without battery storage, is performed in this paper. This concept is developed in order to not only make access to energy possible for rural and peri-urban populations in Africa (by reducing the electricity generation cost) but also to make the electricity production sustainable in these areas. For landlocked countries like Burkina Faso, this concept could help them reducing their electricity bill (then their fuel consumption) and accelerate their rural and peri-urban electrification coverage.     

Optimal sizing of stand-alone hybrid systems based on PV/WT/FC by using several methodologies

This paper presents a comparative study of four sizing methods for a stand-alone hybrid generation system integrating renewable energies (photovoltaic panels and wind turbine) and backup and storage system based on battery and hydrogen (fuel cell, electrolyzer and hydrogen storage tank). Two of them perform a technical sizing. In one case, the sizing is based on basic equations, and in the other case, an optimal technical sizing is achieved by using Simulink Design Optimization. The other two methods perform an optimal techno-economical sizing by using the hybrid system optimization software HOMER and HOGA, respectively. These methods have been applied to design a stand-alone hybrid system which supplies the load energy demand during a year. A MATLAB-Simulink model of the hybrid system has been used to simulate the performance of hybrid system designed by each method for the stand-alone application under study in this work. The results are reported and discussed in the paper.     

热力系统控制可容错性分析与应用研究

根据系统可控性和可观测性理论，通过对控制系统中元(部)件冗余性、冗余度的分析，研究故障系统可容错的条件，对稳压器压力控制系统进行可容错性定量分析；通过分析控制系统的部件对系统的静态性能、动态性能的影响程度，容错控制系统的部件重要度分析，确定引起控制系统故障的关键部件。