机车动力制动对操纵方式及限制坡度的影响
Influences ofLocomotive Dynam ic Brake on Brake Operation and Lim iting Grade
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摘要: 分析不同的列车编组、制动操纵方式、线路坡道条件下的列车调速制动过程.计算表明,采用动力制动, 在12‰的下坡道,用DF8B或SS7单机牵引,缓解增速时间从110 s分别延长为172 s及234 s.对于18‰的下坡 道,用DF8B或SS7双机牵引,缓解增速时间从68 s分别延长为138 s及225 s.采用机车动力制动与空气制动联 合操纵方式还可减少空气制动次数和降低车轮踏面温升,从而提高列车安全性,放宽限制坡度的设计要求.Abstract: Brake processes were analyzed under different locomotives, trains, brake operation procedures, and limiting grades. W ith application ofdynamic brake, release times increase from 110 s to 172 and 234 s for trains hauled by aDF8B or an SS7 locomotive, respectively, at a down slope of 12‰grade, and from 68 s to 138 and 225 s for trains hauled by double DF8B or double SS7 locomotives, respectively, at a down slope of 18‰grade. Combining air and dynamic brake also decreases the times ofairbrakes and the temperature raise on the thread surfaces, which increases the safety of trains and relaxes the constrainton limiting grades in railway design.
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Key words:
- dynamic brake /
- brake operation /
- limiting grade /
- train /
- locomotive
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