机车通过曲线时,轮对将冲击外轨,如图1所示。第一轮对的外轮平面与钢轨的交角θ称为冲角。冲角可以近似计算,即θ=x/R式中 x——第一轮对转心距;R——曲线半径。据此式计算,冲角的数值通常是很小的,最大也不过2°左右。冲角虽小,但它却是造成轮缘磨耗的主要原因之一。根据功能原理可以推导出如下结论:冲角和轮缘力的乘积能直接 When the locomotive passes the curve, the wheelset will impact the outer rail, as shown in Figure 1. The first round of the outer wheel plane and the rail angle θ is called the angle of attack. Angle of attack can be approximated, that is, θ = x / R where x - the first round of the center of rotation; R - curve radius. According to this formula, the value of the angle of attack is usually very small, but also about 2 ° maximum. The angle of attack is small, but it is one of the main causes of wheel rim wear. According to the functional principle can be concluded as follows: The product of the angle of attack and rim force can be direct