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在JD—1轮轨模拟试验机上进行轮轨在干态工况突然加水和水介质条件下的黏着特性试验,着重研究水介质条件下不同速度、轴重以及蠕滑率对轮轨黏着的影响。结果表明:在相同的蠕滑率下,干态工况加水之后轮轨间的黏着系数较干态时的黏着系数降低了50%~60%;在水介质条件下,不论是最大黏着值还是稳定黏着值(机车实际运行黏着区),受车轮速度影响较大,黏着系数随着车轮速度的上升而降低,轴重对黏着系数的影响较小;黏着系数在达到最大值(饱和值)之前随蠕滑率的增加而线性增加,而后随蠕滑率的增加而下降,最后逐渐趋于稳定。最大黏着系数所对应的蠕滑率为0.5%左右。
In the JD-1 wheel and rail simulation test machine wheel and rail in the dry conditions of sudden addition of water and water under the conditions of the adhesive properties of the experiment, focusing on water medium conditions of different speeds, axle load and creep rate on wheel rail adhesion . The results show that under the same creep rate, the adhesion coefficient between wheel rail and rail decreases by 50% -60% when dry condition is added with water. Under the condition of water medium, Stable adhesion value (the actual operating adhesion area of the locomotive) is greatly affected by the wheel speed, the adhesion coefficient decreases with the increase of the wheel speed, and the influence of axle weight on the adhesion coefficient is small. Before the adhesion coefficient reaches the maximum value (saturation value) With the increase of creep rate increases linearly, and then decreases with the increase of creep rate, and finally tends to be stable. The maximum creep coefficient corresponding to the creep rate of about 0.5%.