A railway freight car bogie vibration damping device which can provide composite vibration damping force

Abstract

The invention discloses a railway freight car bogie vibration damping device which can provide composite vibration damping force. A large-body incline wedge vibration damping part is arrange on that upper plane of the bottom of the inclined wedge groove at the end of the bolster and a spring vibration damping part is arrange on the lower plane of the bottom of the inclined wedge groove at the endof the bolster, and the inclined wedge vibration damping part and the spring vibration damping part are connected through a guide seat. The inclined wedge vibration damping part is arranged on the bottom of the inclined wedge groove at the end of the bolster. As that contact friction area of the incline wedge is large, A low damping spring is arranged between that incline wedge and the side frame,the friction resistance of the vehicle at full load is increased, An upper damp spring and a low damper spring are used in different vertical spaces, the advantage of that invention are simple structure, Compact and easy to manufacture, installation and maintenance, Maintenance, both no-load and full-load damping performance stable characteristics, It also has the characteristics of better control bogie rhombus deformation ability and better snake movement stability, which will play an important role in improving and improving the technical performance and running quality of the three-piece bogie of railway freight cars, reducing the wear of vehicle parts, and reducing the cost of vehicle manufacturing, operation and maintenance.

Description

technical field [0001] The invention belongs to the technical field of railway vehicle accessories design, in particular to the technical field of design of a vibration damping device for a bogie of a railway freight car with a large axle load and a fast running speed, and in particular to a railway freight car that can provide composite vibration damping force Bogie damping device. Background technique [0002] For a long time, due to the large quantity and relatively low running speed, most railway freight car bogies adopt mechanical friction damping devices. The mechanical friction damping device has the advantages of simple structure, low cost and convenient manufacture and maintenance. At present, the three-piece cast steel bogies of railway wagons generally adopt two kinds of constant friction resistance wedge friction damping devices and variable friction resistance wedge friction damping devices. The bogies that adopt the former method of vibration reduction are cal...

AI Technical Summary

Problems solved by technology

However, since the damping resistance is constant, the constant frictional resistance wedge type damping device cannot meet the requirements of damping performance under different load conditions of the vehicle, especially as the axle load increases, the vehicle's self-weight coefficient becomes smaller and smaller, often The frictional resistance wedge type vibration damping device is prone to excessive vibration damping resistance at no-load and insufficient vibration damping resistance at full load

If the vibration damping resistance is too large, the impact of the line rail on the wheel set will be directly transmitted to the car body, causing excessive vibration acceleration of the vehicle, deteriorating the running quality, and also accelerating the wear of the friction pair parts of the bogie; if the vibration damping resistance is insufficient, the Cannot effectively suppress the amplitude growth when the vehicle resonates, and the stability of the bogie hunting movement is poor

Although the damping resistance of the variable frictional resistance wedge type vibration damping device changes with the change of the load, its wedge structure is affected by factors such as the space arrangement of the central load spring and the structure of the bolster, so it cannot be designed as a wide body wedge. The contact area between the oblique wedge and the bolster and the side frame is small, especially the contact area between the friction surface of the oblique wedge and the bolster is small, resulting in insufficient ability of the bogie to rely on the oblique wedge to align the side frame and the bolster

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