内燃机车修理周期的探讨

翔实地分析了等间距修理周期的弊端,提出了研究修理周期时应考虑的因素,探讨了实行不等距修理周期的必要性和必备条件.     

康明斯6BT118-01型发动机大修后无法起动一例

我单位在修理一台6BT118—01型发动机时,出现了以前很少见到的故障现象,就是发动机不能起动,且没有任何颜色的烟排出,为故障的诊断提出了难题。后来经我厂技术人员的一致努力,终于将故障排出。下面介绍排出故障的全过程。 这台发动机是大修,进行了镗缸、磨轴、     

内燃机车修理工艺中几个问题的讨论

对内燃机车修理工艺中几个专业术语提出了疑问和修改建议;对损伤、故障、检验和修理工艺流程图等问题进行了分析讨论.     

轮乘制下机车段修制度改革的探讨

通过对机车轮乘制下新的检修形势的分析,提出了确立以机车检查为主、修理为辅,检、修分离,检查范围模块化等建议;只有将机车检查从检修中分离和独立出来,才能真正保证轮乘机制下的机车质量.     

谈135系柴油机输油泵的故障分析与修理检验

介绍了输油泵的工作原理,分析了输油泵常发生故障的现象及原因,说明了对输油泵进行修理和检验的方法.     

柴油机试验尾气余热利用

<正>1问题的提出柳州机车车辆厂是以修理(包括各种修程)铁路运输车辆(机车、客车、货车和特种车等)的国有大中型企业,有职工四千多人,产值7亿元左右,是柳州市的纳税大户。年耗能近一万吨标准煤,能源成本占全厂总成本5%以上。其中生产产品之一—内燃牵引机车修理,     

对16V240ZJB型柴油机换装C型机滑动轴承大、小过轮装配的建议

1 前言16V240ZJB型柴油机凸轮轴传动装置(以下简称传动装置)的作用是将曲轴的转动力矩经一系列直齿轮传递给左右两根凸轮轴.柴油机传动装置是东风4型机车运用中故障发生频率较高的部件之一,我段机车2000年传动装置故障共计19件,而其中左右大、小过轮轴承保持架破碎9件,约占传动装置故障的一半.传动装置故障不仅造成机车在运用中发生机破和临修,而且修理难度较大、周期长,正确分析故障,在检修中采取措施,尽可能减少故障的发生是十分必要的.     

应用“故障报告、分析和纠正措施系统”解决机车柴油机喷油泵惯性故障

"故障报告、分析和纠正措施系统"是设备质量和可靠性管理的一种技术方法。以机车柴油机典型故障,喷油泵卡泵为例,分析了该系统在机车故障管理中的应用。应用表明:"故障报告、分析和纠正措施系统"实际应用效果较好,起到了防止故障再现,提高可靠性水平,保证检修质量,降低设备全寿命周期维修费用的作用。     

柴油汽车行驶无力故障的修理

一台斯太尔牌汽车,用的WD615型柴油发动机,装的是国产P7泵,使用的两极和全程调速器。早上起动车时,发现突发性的油路故障,用手泵油后,能起动,但只运转不到2min,发动机就自动熄火;当再次起动时,情况依旧。显然是供油不足所致。修理中更换了输油泵、手油泵、清洗了管线滤清器、紧固了线接头等;故障现象依旧,经仔细检查高压泵回油管上的溢油阀部件,发现溢油阀与溢油阀体结合平面不平,不起密封作用,拆卸修磨后重装,试车,故障排除。 溢油阀部件见图1。     

中国北车大连机车研究所有限公司增压器修理基地

中国北车大连机车研究所有限公司增压器修理基地（大连泽隆机械有限公司） 成立于2005年9月,主要从事铁路内燃机车用ZN310、ZN315、ZN310-LSA4、ZN270、ZN285、ZN300D1C等系列增压器的大修、中修和转子大修业务。     

关于在机车检修中实施项目管理的探讨

1 概述 随着国内冶金行业的飞速发展,冶金企业铁路运输日趋繁忙.与此同时,机车检修也面临着新机车、新技术和新工艺的大量运用.随着莱芜钢铁集团有限公司(以下简称莱钢集团)内燃机车数量和车型的不断增加,检修工艺复杂、检修生产组织难度加大.而作为冶金企业与国铁检修部门相比,在人员和检修能力上还有很大的差别.     

考虑不完全维修的风电机组预防性机会维修策略

针对风电机组维修方式单一、成本昂贵的问题,提出考虑不完全维修的风电机组预防性机会维修策略。首先采用威布尔分布对风电机组可靠度进行建模,根据预防维修可靠度和机会维修可靠度确定不完全维修可靠度,对处于机会维修区间内的关键部件采取不完全维修和机会更换两种维修方式;采用役龄递减因子和故障率递增因子对不完全维修方式进行建模,进而确定机组的维修计划;然后建立风电机组的维修成本模型,以成本最低为目标,通过三次样条内插法对不完全维修可靠度进行优化;最后结合具体风电机组维修案例进行仿真。结果表明,该策略可以提高部件维修协调性,降低维修成本,从而验证了所提策略的有效性。     

Multi-objective opportunistic maintenance optimization of a wind farm considering limited number of maintenance groups

Several different models provided by researchers to maintain a wind turbine, but most of these models only focused on the case involved a single objective optimization problem. In practice, real cases of wind farms lead to multi-objective approach to optimize maintenance efforts. In this paper, based on an opportunistic approach, a multi-objective based model is proposed to optimize the maintenance of a farm involved several different types of wind turbines. The assumptions of stochastic behavior of wind velocity as well as the existence of a limited number for maintenance groups are also considered in this new approach. The proposed model considering imperfect maintenance, attempts (1) maximizing the expected rate of energy and (2) minimizing the total expected costs related to maintenance efforts. The opportunistic approach is also provided by the component's reliability threshold values. The comparative analysis addresses that the capability of the proposed model is more efficient compared to models addressed in literature.     

Effect of preventive maintenance intervals on reliability and maintenance costs of wind turbine gearboxes

As many of the installed wind turbines (WTs) get older or approach their design life, there will be a drive to keep extending the lives of the main components especially the gearbox. The challenge of operations and maintenance will potentially be even more as there will be a need to keep the cost to a minimum. Similarly, as years of experience of operating WTs accumulate, knowledge about the behaviour and failure of subsystems is gained as well. Also with good documentation and repository of historical operational, performance and failure data, future decisions of operations and maintenance can be taken on the basis of insights from past experience. This paper presents an approach for implementing preventive maintenance (PM) by using historical failure data to determine the optimal PM interval required to maintain desired reliability of a typical module or subassembly. This paper builds upon previous research in the area of WT gearbox reliability analysis and prediction, taking it further by examining the relationships between the frequency of a PM task and the reliability, availability and maintenance costs. The approach presented demonstrates how historical in‐service failure data can be used in PM task selection based on the minimum maintenance cost and maximum availability. Available historical field failure data of the high speed module of a Vestas 2MW WT gearbox is used to validate the approach and show its practicality. The results of this study are then presented—indicating that choosing the right PM interval based on the minimum unit maintenance cost and maximum availability also improves WT gearbox reliability. Copyright © 2014 John Wiley & Sons, Ltd.     

Photovoltaic operation and maintenance evaluation

An Electric Power Research Institute (EPRI) sponsored evaluation of the operation and maintenance (O&M) experience at seven selected photovoltaic installations in the United States is presented. The presentation of the actual O&M costs experienced by the seven sites, documentation of the largest problem areas, identification of failure causes, and projections of O&M costs for future installations are included     

以可靠性为核心的机车维修体制的建立

针对我国铁路机车现行维修体制存在的问题 ,探讨如何应用以可靠性为核心的维修理论。通过分析机车部件功能故障 ,确定预防性维修工作类型 ,以及维修模式 ,建立科学的维修体制。     

汽车维修中的几种常见故障分析

笔者长期从事各种汽车维修的技术工作,在日常工作中,就经常发现的一些常见小故障,浅析如下:     

风扇磨煤机检修方式分析

风扇磨煤机是火力发电厂燃用褐煤锅炉机组直吹式制粉系统的主体设备,也适用于化工、造纸厂的动力锅炉制粉需要.它是一种完成煤的磨碎、干燥和输送等三大功能合一的高效率制粉设备.风扇磨煤机主要是由带有护板的机壳和在机壳中高速旋转的打击轮组成.打击轮的检修、拆卸由专门的装置即风扇磨煤机检修车独立完成,打击轮可以方便地拆卸和检修.分析了配备风扇磨煤机直吹式制粉系统的大型火力发电厂中磨煤机检修方式及磨煤机检修中的注意事项.     

Modelling wind turbine degradation and maintenance

This paper presents an asset model for offshore wind turbine reliability accounting for the degradation, inspection and maintenance processes. The model was developed based on the Petri net method that effectively captures the stochastic nature of the dynamic processes through the use of appropriate statistical distributions. The versatility of the method allows the details of the degradation and maintenance operations to be incorporated in the model. In particular, there are dependent deterioration processes between wind turbine subsystems, complex maintenance rules and the incorporation of condition monitoring systems for early failure indication to enable replacement prior to failure. The purposes of the model are to predict the future condition of wind turbine components and to investigate the effect of a specified maintenance strategy. The model outputs are statistics indicating the performance of the wind turbine components; these include the probability of being in different condition states, the expected number of maintenance actions and the average number and duration of system downtime under any maintenance strategy. Copyright © 2015 John Wiley & Sons, Ltd.     

浅析活塞外圆加工刀纹故障与检修

很多用户使用一派数控生产的ECK系列数控活塞异形外圆车床时,加工活塞时常遇到刀纹问题,由于该系列设备机电一体化程度较高,用户单位维护人员往往在判断和检修时无从下手,本人根据多年的调试和维护经验,系统阐述该类故障产生的原因和处理办法.