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自60年代以来,各国铁路由于运行速度的提高和轴重的增大,整体车轮的故障越来越多。假定在80公里/时速度下制动,转化为热量的制动功车轮须吸收约85％,而在坡道制动中,每轴的制动功约为100千瓦,在停车制动的初始阶段每轴的制动功甚至高达450千瓦。因此,整体车轮因过热而发生故障是不难理解的。分析表明,持续制动引起的车轮变形和高速车辆频繁的停车制动使轮辋产生的热裂纹是最典型的与制动有关的车轮故障。在最严重的情况下,甚至会出现脱
Since the 1960s, due to the improvement of the running speed and the increase of the axle load of various countries, the failure of the whole wheel is more and more. Assuming braking at 80 km / h, the braking power converted to heat must absorb about 85%, whereas in the case of ramp braking, the braking power per axis is about 100 kW. At the beginning of the parking brake The braking power per axis is even up to 450 kilowatts during the phase. Therefore, it is not hard to understand that the whole wheel breaks down due to overheating. The analysis shows that the wheel deformation caused by continuous braking and the frequent parking brake caused by high-speed vehicles make the rifles produce the most typical hot-wheel rims as braking-related wheel faults. In the most serious cases, there may even be off