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DR-1径向转向架是三大件转向架的改进型式。顾名思义,其特点是通过曲线时车轴取径向位置。导向作用由连接于轴承鞍而又互相连接的两个弓形导杆组成的较简单机构来实现。这种机构在直线上也有助于抑制蛇行运动。在研究的初期阶段曾广泛地进行了室内和现场试验,并获得了令人鼓舞的成果,大大提高了运行稳定性。因此,现已发展到更大规模的实际运用试验。试验表明,速度在145公里/小时以内时,对于空重车两种状态都具有良好的稳定性。
The DR-1 radial bogie is an improved version of the three-piece bogie. As its name implies, its characteristic is that the axle takes the radial position through the curve. The guiding effect is achieved by a simpler mechanism consisting of two arcuate guides connected to the bearing saddle and interconnected. Such a mechanism also helps to suppress snake-like movement in a straight line. In the early stages of the study, extensive field and field trials were conducted and encouraging results were obtained, greatly improving operational stability. Therefore, it has been developed to a larger scale of practical application test. Tests show that the speed of 145 km / h or less, for both empty and heavy vehicles have good stability.