内燃机车空气制动机故障诊断系统的研究
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摘要
中国铁路经过连续6次提速,制动装置的可靠性对列车运行安全的影响越来越大,研究和设计机车制动机故障诊断系统势在必行。论文首先对内燃机车JZ-7型制动机的结构、工作原理和气压传动特点进行了详细分析,针对JZ-7型制动机阀件繁多、管路错综、控制关系复杂的特点,将其划分成若干个相对独立的监控单元。通过对各阀件常用故障的特征分析,选取了气压及其变化速率这一特征数据作为实时监测对象,应用故障树的分析方法创建了制动机故障树,为故障诊断系统的研究与设计提供了理论依据。在此基础上结合JZ-7型制动机的实际工作状况,进行了系统的软、硬件设计,完成了故障诊断系统的研究与开发。论文最后给出了该系统在试验装置上的试验验证结果,验证表明该系统在不改变机车原有制动性能和结构的前提下,能对制动机各主要阀件的故障进行实时的检测和诊断,显示与记录制动机的故障状态,为指导机车乘务员迅速排除故障提供了有效的手段。
After six consecutive speed-up about china railway, the reliability of the braking device to train running safety plays an increasingly prominent role. It is imperative to research and design fault diagnosis system of diesel locomotive brake. In this paper, the structure, working principle and the characteristics of pneumatic transmission of JZ-7 diesel locomotive brake are analyzed in detail. Because JZ-7 diesel locomotive brake owns various valves, intricate pipelines and complicated control relationships, it is divided into several monitoring units in relatively independence. The paper analyzes common fault characteristics of the valves, selects the feature data of air pressure and its changed speed to carry on real-time detection, and applies analysis method of fault tree to creat fault tree of the brake, it provides a theoretical basis for research and design of fault diagnosis system. On this basis, combining with the actual working environment of JZ-7 diesel locomotive brake, the paper designs the hardware and software and researchs and develops the fault diagnosis system. Finally, test results based on physical test equipment are also presented. The test results prove that this system does not affect the original braking performance and structure of diesel locomotive and can detect and diagnose just-in-time the faults of main valves. This system also can record and display working conditions of the brake and provide an effective method for locomotive crew to get rid of the faults rapidly.
After six consecutive speed-up about china railway, the reliability of the braking device to train running safety plays an increasingly prominent role. It is imperative to research and design fault diagnosis system of diesel locomotive brake. In this paper, the structure, working principle and the characteristics of pneumatic transmission of JZ-7 diesel locomotive brake are analyzed in detail. Because JZ-7 diesel locomotive brake owns various valves, intricate pipelines and complicated control relationships, it is divided into several monitoring units in relatively independence. The paper analyzes common fault characteristics of the valves, selects the feature data of air pressure and its changed speed to carry on real-time detection, and applies analysis method of fault tree to creat fault tree of the brake, it provides a theoretical basis for research and design of fault diagnosis system. On this basis, combining with the actual working environment of JZ-7 diesel locomotive brake, the paper designs the hardware and software and researchs and develops the fault diagnosis system. Finally, test results based on physical test equipment are also presented. The test results prove that this system does not affect the original braking performance and structure of diesel locomotive and can detect and diagnose just-in-time the faults of main valves. This system also can record and display working conditions of the brake and provide an effective method for locomotive crew to get rid of the faults rapidly.
引文
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Code = 80040e31
Code meaning = IDispatch error #3121
Source = Microsoft OLE DB Provider for SQL Server
Description = 超时已过期
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CADORecordset Error
Code = 80040e31
Code meaning = IDispatch error #3121
Source = Microsoft OLE DB Provider for SQL Server
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Code meaning = IDispatch error #3121
Source = Microsoft OLE DB Provider for SQL Server
Description = 超时已过期
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CADORecordset Error
Code = 80040e31
Code meaning = IDispatch error #3121
Source = Microsoft OLE DB Provider for SQL Server
Description = 超时已过期
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Code meaning = IDispatch error #3121
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Description = 超时已过期
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CADORecordset Error
Code = 80040e31
Code meaning = IDispatch error #3121
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Code = 80040e31
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