Dissertation
Dissertation > Transportation > Rail transport > Vehicle Engineering > General issues > Body construction and equipment > Brake

Reliability Analysis for the Equal Vavle Used in Shanghai Metro Line 1 DA01 Vehicles

Author ZhuZuoQing
Tutor HeWeiLian;YuQiang
School Shanghai Jiaotong University
Course Vehicle Engineering
Keywords Balanced valve Reliability Analysis Reliability model Failure modes and effects criticality analysis Fault Tree Analysis
CLC U270.35
Type Master's thesis
Year 2011
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Countries in the world in the design of a subway train braking system , the general air brake as a safety brake . Shanghai Metro Line the DA01 -type train air brake system is commonly used brake fast brake and emergency brake 3 branch , and its working principle is to get the wind source air supply unit from the train , according to their respective control mode control pressure signal , amplified by the equalizer valve flow type foundation brake , implemented by the foundation brake brake . Three kinds of brake must be balanced valve flow amplification and equalization valve must pass through the channel . For each section for a vehicle , the brake control unit and the foundation brake in the structure are redundant , but only one equalizer valve , therefore affecting the reliability of the system for the braking system, the equalization valve become key components must its reliability . Firstly, analysis of the overall structure of the equalizer valve , its feature division , and gives a functional block diagram of the entire valve and reliability of a block diagram , to establish the reliability of the valve model . Then follow the functional partitioning of the various components of a balanced valve failure analysis , with the failure modes and effects and criticality analysis balanced valve parts are numbered , single point of failure to identify its components may occur , listed the failure mode probability of occurrence of grade and hazardous level accordingly drawing dangers matrix ; With the fault tree analysis of a balanced valve failure logical segmentation, to identify the minimal cut set of the top event , a combination of the type of fault analysis of the causes of valve failure , and through quantitative calculation to determine the reliability index of the valve . Papers on domestic braking system balancing valve reliability test , test its reliability verification , balanced valve life curve distribution patterns , and the results are extended to all types of valve train braking system . Reliability analysis based on exploring balanced valve repair and protection . Estimate the average service life of the valve through the valve the positive train line operators in the frequency of use , and maintenance of reasonable configuration , according to the regulations of repairs .

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