Double-acting friction damper of railway wagon bogie

Abstract

The invention discloses a double-acting friction damper of a railway wagon bogie. The damper is used for being arranged between a side frame and a swing bolster and comprises an inclined wedge block.Containing cavities are arranged in the two ends of the inclined wedge block in a length direction, a first spring is arranged in each containing cavity, the top ends of the first springs are fixedlyconnected with the top ends of the containing cavities, and the bottom ends of the first springs extend downwards to penetrate out of the bottom ends of the containing cavities to be fixedly connectedwith the swing bolster. A second spring is arranged below the middle of the inclined wedge block, the top end of the second spring is fixedly connected with the bottom end of the middle of the inclined wedge block, and the bottom end of the second spring extends downwards to be fixedly connected with the side frame. The first spring is mounted on the swing bolster after being compressed, fixed and displaced so as to provide a fixed counter force for the inclined wedge block; and the second spring is installed in a spring bearing platform of the side frame, the second spring can generate dynamic displacement along with up-down vibration of the swing bolster in a vibration process, the variable counter force is provided for the inclined wedge block, a damping requirement of empty and loadedvehicles can be met, vibration reduction performance is stable, and diamond-resistant rigidity is large.

Description

technical field [0001] The invention relates to the technical field of friction shock absorbers, in particular to a double-acting friction shock absorber for railway freight car bogies. Background technique [0002] At present, most of the truck bogies are cast steel three-piece bogies. The vibration reduction adopts the oblique wedge friction method, which is composed of oblique wedges and damping springs. The role of energy. According to the technical characteristics, it can be divided into constant friction damping and variable friction damping. The variable friction damping wedge is located on the damping spring, and the damping spring is located on the spring bearing platform of the central square frame of the side frame. Different pressures are applied to the wedge, thereby changing the frictional force between the wedge and the wear surface of the side frame column. The damping spring with constant friction damping is compressed and fixed between the wedge and the ...

AI Technical Summary

Problems solved by technology

Although the variable friction damper can adjust the spring parameters so that the bogie can obtain the damping required by the empty vehicle, it is usually difficult to fully take into account due to the limitation of structural space and other factors. The anti-diamond stiffness is small and cannot meet the requirements of dynamic performance

In addition, although the existing constant friction shock absorber has a large width, because the spring reaction force is a fixed value, it cannot take into account the damping required by the empty and heavy vehicle, resulting in poor dynamic performance of the bogie

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