Variable friction control type oscillating damper of rail wagon

Abstract

The invention discloses a variable friction control type oscillating damper of a rail wagon. The oscillating damper comprises a tapered wedge body and an oscillation damping spring assembly, wherein the oscillation damping spring assembly is arranged blow the tapered wedge body; the tapered wedge body is installed at the position of an end dent composed of a swing bolster; the lower end of the oscillation damping spring assembly is fixed on a central square frame spring bearing platform formed by lateral frames. The variable friction control type oscillating damper is characterized in that a top rod is arranged in an inner cavity of the tapered wedge body; the upper end of the top rod is connected with the top part of the tapered wedge body through a fastening assembly; the lower end of the top rod passes through a through hole formed by the swing bolster, and a circular boss is arranged at the lower end of the top rod; a tapered wedge inner spring is sleeved on the top rod; the upper end of the tapered wedge inner spring props against the top of the inner cavity of the tapered wedge body; and the lower end of the tapered wedge inner spring props against the platform at the position of the end dent of the swing bolster. Owing to the mechanical property of the tapered wedge inner spring, the circular boss on the top rod is detached from the upper end of the oscillation damping spring assembly in an unloaded state, while propping against the upper end of the oscillation damping spring assembly in a loaded state. The variable friction control type oscillating damper has the characteristics of low abrasion loss, stable oscillation damping performance and large diamond resistant rigidity.

Description

technical field [0001] The invention relates to a vibration damping device on a railway freight car bogie, in particular to a variable friction control type vibration damper for railway freight cars. Background technique [0002] At present, the most commonly used vibration damping components for railway freight car bogies are friction dampers. Friction dampers are generally composed of wedges and damping springs. The direction of the force is always opposite to the direction of the train movement. to prevent vibration. The way of damping resistance of friction dampers directly affects the vibration performance of trains. According to the resistance characteristics of damping, it can be divided into variable friction wedge dampers and constant friction wedge dampers. [0003] The beveled edge of the variable friction wedge type shock absorber is embedded in the wedge-shaped groove at the end of the bolster, the vertical edge is pressed against the wear plate of the side fra...

AI Technical Summary

Problems solved by technology

The constant friction wedge type shock absorber has two main disadvantages: First, in order to take into account the vibration damping performance of empty and heavy vehicles, the vibration damping force is usually too large when the vehicle is empty, and the vibration damping force is too small when the vehicle is heavy. poor performance

[0005] The performance of the railway freight car shock absorber directly affects the dynamic characteristics of the train, and even relates to the safety of the train. Small diamond rigidity and constant friction wedge type shock absorber have the disadvantages of poor vibration damping performance in order to take into account the state of empty and heavy vehicles, but the progress has been slow so far

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