High speed test and bearing temperature rise of high speed power car with hollow axles on rolling and vibrating test stand

The critical speed and steady index during high speed test of high speed power car with hollow axles on rolling and vibrating test stand were briefly introduced, and the temperature rise of various bearings and some laws were presented in detail. Tests showed that if bearing temperature permits, gearbox leakage is eliminated, and the structure of clamping ring on outer hollow axle is further improved, power car with hollow axle should have improved lateral and vertical steady indexes at 400km/h.