Railway vehicle axle box rubber anti-vibration pad with built-in dynamic vibration absorber

Abstract

The invention discloses a railway vehicle axle box rubber anti-vibration pad with a built-in dynamic vibration absorber, and belongs to the technical field of railway vehicle parts. The anti-vibrationpad comprises an upper base plate, a lower base plate, rubber blocks and a mass block. The upper base plate is a metal circular ring thin plate, a vertical annular flange is arranged on the upper portion of the upper base plate, the lower base plate is a metal circular ring thin plate, the four separated rubber blocks are arranged in a circular ring area between the upper base plate and the lowerbase plate, and the mass block is arranged in a center area defined by the four rubber blocks. The anti-vibration pad can reduce vertical vibration energy of an axle box suspension device, reduce high-frequency vertical vibration of four axle boxes of the same bogie, reduce transverse vibration energy of the axle box suspension device, improve transverse stability of a wheel set, reduce a transverse dynamic load of a wheel rail and reduce abrasion.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle components, and in particular relates to a rail vehicle axle box rubber vibration damping pad with a built-in dynamic shock absorber. Background technique [0002] At present, most rail transit vehicles are dominated by two-axle bogies. Passenger vehicles need to meet higher comfort requirements. The primary suspension (or axle box suspension) device and the secondary suspension device arranged between the frame and the corbel or the car body. The suspension device plays the role of damping and buffering, which determines the stability and safety of the vehicle. [0003] During operation, the dynamic load generated between the wheel and rail is transmitted to the car body through the primary suspension, frame, and secondary suspension. Therefore, the closer to the wheel-rail contact point, the shorter the load transmission path, especially the parts under the primary suspension device (such...

AI Technical Summary

Problems solved by technology

[0004] Modern rail vehicles are constantly developing towards high speed and heavy load. In the vehicle design, the vibration load that increases with the increase of speed must be solved. More complex suspension systems or active / semi-active control technologies are often used, which increases the complexity of the structure, and There are control system stability and reliability issues

Especially for high-speed vehicles, although the manufacturing quality of parts continues to improve, the normal / abnormal load on the wheel axle increases significantly, and the inevitable fatigue failure of parts not only shortens the service life of parts, but also endangers driving safety.

like figure 1 As shown, for the existing pivoting arm axle box positioning and primary suspension device, the vibration energy and elastic potential energy are continuously exchanged by means of steel springs, and the vibration energy is continuously consumed by the two damping parts of the hydraulic shock absorber and the axle box rubber pad. , but the shock absorber is unloaded during high-frequency vibration, and it is difficult to effectively suppress vibration only by traditional rubber pads

When the vehicle cannot maintain a good wheel-rail contact state or a reasonable configuration of bogie parameters, the wheel-rail load will often increase abnormally, the entire axle box positioning and the vibration energy of the primary suspension system will increase, and it is very easy to induce steel springs to break due to fatigue. Oscillator oil leakage, crank arm axle box cover bolts loose / lost, etc.

Moreover, the high-frequency dynamic loads generated by the four axle boxes in a bogie have inconsistent phase lags, which can lead to high-frequency torsional vibration cracking of the frame; and after the failure of the primary suspension parts, the vibration transmission rate of the frame increases, and at the same time increases The load of each part of the large secondary suspension may even affect the stability and safety of the car body

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