机车车辆等效(二次换算)闸瓦力的速度分级核定

Check up Effective(2nd Conversion)Brake Shoe Force of Locomotive & Car by Train Speed Class

等效(二次等效换算)法对于多种材质闸瓦(片)并用的列车制动力计算甚为适用,但是很多闸瓦的等效系数受到制动初速度的影响,所以按列车最高速度的3个级别,分别对应选择各种闸瓦(片)的等效系数以及确定相关的机车车辆每台(辆)的等效闸瓦力符合列车运用状况,更接近实际。这3个速度级别是对应(1)160 km/h快速客车(含快速客运机车、快速动车组及快速行邮车);(2)120 km/h普通客车(含普通客运机车、普通行邮车和行包车以及快运货运机车和快运货车);(3)100 km/h普通货车(含普通货运机车)。此外,还核定按湿轨黏着条件限制的机车车辆不同闸瓦(片)的比换算闸瓦力以供铁道机车车辆制动设计及运用参考。

The equal effective method （2nd equal effective conversion） is best suited for calculating train braking force of the composite formation train with brake shoes of different materials, but the equal effective coefficients of many type brake shoes are influenced by initial braking speed, so in accordance with three classes of train top speed, the selected approximate values of equal effective eoeffieients and the determined correlative equal effective brake shoe （,or brake pad） force for one locomotive or car are comformed to train operating condition and more suited to actual situation. The 1st class is 160km/h fast passenger car including fast passenger locomotive, fast motor unit and fast baggage ＆ postal car; 2nd class is 120km/h general passenger car including general passenger locomotive, general baggege ＆ postal car, baggege ＆ parcel car, fast freight locomotive and fast freigeht car; 3rd class is 100km/h generel freight ear including general freight locoroetive. In addtion, verification of unit conversion brake shoe （or brake pad） force （the ratio of conversion brake shoe force to mass） under adhesion condition limit of wet rail is useful for braking design and operation of railway locomotive and car.