The possibility of using a hydroblock with a frequency-dependent elastic-viscous characteristic in a horizontal coupling unit of a wheelset and a trolley frame

Abstract

The paper considers the possibility of using a axle lever with a trolley frame of a high-speed electric train in the communication node instead of a traditional rubber-metal hinge with a conditionally constant longitudinal stiffness - a hydroblock having a frequency-dependent characteristic of radial horizontal stiffness. This design of the hydroblock allows you to combine low values of longitudinal stiffness when moving in curved sections of the track with high values of longitudinal stiffness necessary for stability of movement at high speed. With an increase in the speed of movement of the railway crew, the frequency of horizontal vibrations of the wheelset increases, which leads to an increase in the dynamic rigidity of the hydroblock and ensuring a high critical speed of the crew. On the contrary, movement in curved sections of the track is carried out with lower movement speeds and vibration frequencies of the wheelset. The selection of optimal parameters of the hydroblock makes it possible to provide both a high margin of stability and a decrease in the angle of approach of the wheelset when driving in curved sections of the track, and as a result, a decrease in wear on the surfaces of the wheel and rail.