装载机转向液压系统故障诊断与排除

由于液压系统问题导致转向系统发生故障是装载机使用中的常见现象。介绍了装载机的五种常见故障，详细分析了故障的产生原因，并提出了问题的解决办法。     

装载机与运输车辆的最佳匹配（1）

运用排队论及优化方法，建立装载机一汽车相互配合系统的优化数学模型，并以此模型对该系统进行优化计算，确定出最佳的汽车与装载机斗容量之比、最合理的车辆数及组织形式，同时分析了斗容比和车辆数对系统经济性的影响，总结出与各种装载机相配合的汽车载重量和车辆数。     

装载机转向系统的维护与检修

汽车转向系统在驾驶、操作及使用上的重要性等同于刹车,检修时需特别慎重。检修可分为内部检修和外部检修。外部检修是针对方向盘间隙、转向装置、操作性能、有无漏油等情况的检修,内部检修是针对转向装置的各零件的检修。文章简要介绍了装载机转向系统的维护与检修。     

BEN7.16装载机行驶系统故障分析

就ＢＥＮ７．１６全液压履带式装载机在使用中出现的两种故障，通过对其制动系统和行驶系统的逻辑关系和工作原理的详细介绍，分析了故障原因是由于对系统不能正确使用和维修所造成的，并提出了解决办法。     

装载机与自卸汽车的最佳匹配

本文运用排队论及优化方法，建立了装载机一汽车相互配合系统的优化数学模型，利用数学模型对该系统进行优化计算，确定出最佳的汽车与装载机斗容量之比，最合理的车辆数以及最佳组织形式。分析斗容比和车辆数对系统经济性的影响，总结出各种装载机组配合的汽车载重量和车辆台数。     

国产中型轮式装载机故障分析

中型轮式装载机是目前各类工程施工中使用最为频繁的设备。作为一种工程机械,由于其工作环境恶劣,工作条件多变,导致其时常发生故障。如果装载机发生故障,使用者必须根据不同型号装载机的各系统的结构、原理,结合其使用情况和具体的故障现象进行分析和检查。在准确地确定故障原因后,才能有效地对设备进行维修。本文详细分析了装载机传动系统故障问题。一、装载机传动系统故障分析与检查国产中型轮式装载机普遍采用了串联功率流式的液力机械传动方式。其中液力变矩器采用一级涡轮或二级涡轮输出,变速器则采用动力换挡的行星变速器或定轴式变速器。国     

装载机与运输车辆的最佳匹配（2）

装载机与运输车辆的最佳匹配（２）西安公路学院杨秦森３结果分析对（９）式和（１０）式进行优化计算，当系统单位施工费用Ｃ为最小时，系统配合达到最优。最佳匹配参数结果见表４。表４装载机与汽车相互配合系统注：ｑ—装载机斗容量，ｍ３；ｔ—汽车运输、卸车和返回过...     

装载机工作装置三维实体设计系统的研究

在装载机工作装置优化设计的基础上，对共作装置三维实体设计进行了探讨和研究，实现了装载机并作装置三维实体参数式交互设计，建立了装载机的工作装置三维实体设计系统．     

奔驰S500空气悬挂上升之后,无法下降

车型：奔驰S500轿车,W220底盘。 故障现象：空气悬挂上升之后,无法下降,左边的减振器比右边高了许多,车辆无法正常使用。 故障诊断：接车后,通过了解得知,该车是在行驶中出现的问题,其他的情况车主什么都不知道了。从现象上看来，应该是该车的空气悬挂系统存在问题，使用诊断仪进行空气悬挂系统检测，系统中存储了3个故障码：     

根据仪表数值的变化判断故障

就ＺＬ５０装载机在使用维修中出现的两种故障，通过对变速箱液压系统调压阀的工作原理的分析，说明了故障在压力表上的表现特征，并提出了解决办法。     

Dynamic model and validation of an articulated steering wheel loader on slopes and over obstacles

This paper devotes both analytical and experimental efforts in developing a comprehensive dynamic model for an articulated steering wheel loader. The general motion of a wheel loader without suspension is described by seven degrees of freedom (DOF) (three for translation and four for rotation) in this model, which can be used to study the problem of wheel loader dynamics on slopes and over obstacles. A scale wheel loader was designed and manufactured to validate the dynamic model in three conditions (turning on level ground, turning on slopes, and passing over obstacles). The test results reasonably agree with the simulation results. The developed dynamic model was found to be useful and could serve as an important tool for analysing the stability of wheel loaders.     

On fault isolation for rail vehicle suspension systems

Reliability of the railway vehicle suspension system is of critical importance to the safety of the vehicle. It is very desirable to monitor the health condition and the performance degradation of the suspension system online, which offers the important information of the suspension system and is critically important for the condition-based maintenance rather than scheduled maintenance in the future. Advanced fault diagnosis method is one of the most effective means for the health monitoring of the suspension system. In this paper, taking the lateral suspension system as an examcple, the fault isolation issue for different component faults occurring in the suspension system is concerned. The sensor configuration for obtaining the vehicle state information and the mathematical model for the lateral suspension system are presented. Four fault features in the time domain and three fault features in the frequency domain are used for each sensor signal. Three different methods, Dempster–Shafer (D–S) evidence theory, Fisher discrimination analysis (FDA) and support vector machine (SVM) techniques are applied to the fault isolation problem. Simulation study is carried out by means of the professional multi-body simulation tool, SIMPACK. The simulation results show that these methods can isolate the considered component faults effectively with a high accuracy. The D–S evidence-based fault isolation approach outperforms the other two methods.     

Assessment of wheel loader vibration on the riding comfort according to ISO standards

Vibration accelerations were measured on a compact wheel loader during 11 operations with two drivers and with/without the activated boom suspension system (BSS). Two standards, ISO 2631-1 (1985) and ISO 2631-1 (1997), were used to assess the effect of wheel loader vibration on comfort. The assessment results of ISO 2631-1 (1985) showed that vibration in the frequency range from 4 to 20 Hz in the vertical direction and in the frequency range from 1.6 to 3.15 Hz in the vertical and driving directions plays an important role in comfort assessment. The overall total values of vibration measured on the wheel loader in all operations exceeded the ‘uncomfortable’ boundary specified in ISO 2631-1 (1997). The speed had a larger influence on the vibration intensity than the bucket load, the BSS or the driver biodynamic response during driving. During driving and V-cycle, the difference of vibration intensity with two drivers in the z-direction is larger than that in the x- and y-direction.     

ZL50型轮式装载机传动系统维修

介绍了ZL50型轮式装载机传动系统维修。包括离合器打滑引起油温过高、变速器换挡故障以及变速器常见故障。离合器打滑,使离合器片之间非正常摩擦产生大量的热,从而使油温过高。引起离合器打滑的原因主要有离合器片分离不彻底、过度磨损、翘曲变形、油压过低等。     

故障树分析法在工程机械维修与管理中的应用

从故障树分析法（FTA法）的作用和应用方法两方面对其进行了阐述,并将故障树分析法应用于路桥施工现场机械故障的诊断。以装载机和塔吊的故障和维修为例,采取故障树的形式,全面、系统、层次性地形成诊断分析结果,验证了故障树分析法良好的应用效果,并对故障树分析法在工程机械维修与管理中应用的特点进行了简要总结。     

汽车电子控制悬架系统的故障诊断与检修

随着对汽车乘坐舒适性要求的提高，一些进口高档轿车（如凌志LS400等）装备了电子控制的悬架系统。汽车电子悬架系统的故障与其传感器、执行元件和电子控制单元有关。介绍了电子悬架系统维修的注意事项、故障代码的读取方法和主要元件的检修。     

轮式装载机传动系载荷测试与处理

为编制轮式装载机载荷谱、确定装载机传动系疲劳寿命,测试了ZL50轮式装载机传动系统的扭矩载荷,采用线性拟合方法标定扭矩真值,经滤波与剔除异常峰值处理,确定信号低通滤波频率为1Hz,获得符合装载机工作实际的纯净随机载荷时间历程