ANALYSIS OF THE POSSIBILITIES TO IMPROVE TRACTION PROPERTIES OF NEW FREIGHT LOCOMOTIVES AND SWITCHERS

The problem of further increasing the traction properties of new freight locomotives and switchers is considered, while bringing the traction coefficient in operation from 0.27...0.3 to 0.4...0.5. It is proved that in existing support and axial drives with rigid gear, dynamic torques worsen traction properties. It is proposed to use traction drives with elastic traction gear and support frame drives, as well as suspension of traction motors, which reduces the unevenness of loads along the axes of the carriage. It is proposed to use devices that affect the contact surface of the wheel with the rail using a magnetic field. As a result of the conducted research, it is found that for locomotives with a wheel diameter of 1250 mm, it is rational to use a traction drive with a support frame suspension of the engine and an axial gearbox with an intermediate gear wheel. For switchers with a wheel diameter of 1050 mm, it is rational to use arc-stator asynchronous motors with traction amplifier windings between inductors.