Research on Axle Box Bearing Technology of 400 km/h High-speed Train
The reliability and speed capability are the key factors for the safety and efficiency operation of high-speed train.The technical features of double row tapered axle box bearing and double row cylindrical axle box bearing are compared and analyzed based on the application fields and recondition data.For the currently high-speed train,the low friction design optimization for double row taper axle box bearing and heat radiation optimization for the axle box is studied at the target of reach train speed 400 km/h.To estimate the friction power of the bearing accurately,a bearing-vehicle rigid-flexible coupling dynamic model was established.The dynamic loads of the bearing were calculated in the presence of the Beijing-Tianjin track irregularities and measured wheel irregularities.The simulation results show that,at train speed 400 km/h,the heat friction power of axle bearing with X-life design reduce around 24％compared with the currently design.The rig test results also shows that the operating temperature of former is 15 ℃ lower than the latter even at much higher speed.The heat simulation of axle box shows,with same heat source input and environment temperature and heat dissipate setting parameters,the operating temperature of axle box with aluminum is around 20 ℃ lower than the axle box with cast iron.
万方数据
维普
