Fabricated all-direction same-frequency steel rail damping vibration absorber

Abstract

The invention relates to an assembly type all-direction same-frequency steel rail damping vibration absorber which comprises a shell, wherein the shell is installed on rail webs on the two sides of a steel rail and matched with the surface shape of the rail webs of the steel rail, the outer side face of the shell is flush with the rail bottom of the steel rail, an installation space is defined in the shell, the two ends of the shell are open, and the two ends of the shell are detachably connected with end covers; two elastic bodies which are cylindrical, wherein the axes of the elastic bodies are parallel to the length direction of the steel rail, and one end of each elastic body is detachably arranged on the inner side wall of the corresponding end cover; and a mass block which is installed in the installation space, wherein the two ends of the mass block are detachably connected with the other ends of the two elastic bodies in a one-to-one correspondence mode. A gap reserved between the mass block and the shell is larger than or equal to 5 mm. According to the fabricated all-direction same-frequency steel rail damping vibration absorber, the cutting reducing performance of rubber is utilized, so that the rigidity of a steel rail vibration absorber product is reduced; through the assembly type replaceable parts, the resonant frequency is rapidly adjusted, material waste is reduced, the vibration absorbing performance is better, and the application range is wider; and the elastic bodies and the mass block are both located in the shell, so that the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of rail vibration reduction, in particular to an assembled isotropic and same-frequency rail damping vibration absorber. Background technique [0002] With the continuous development of my country's urban rail transit, the rapid increase in the mileage of traffic, the densification of the line network, and the transportation volume have also risen linearly. Passengers' requirements for operating quality have also gradually increased with the improvement of living standards. With the continuous increase of the service time of the line, the track state will produce different degrees and different forms of wear. When the rail is short-wave corrugated, it will produce extremely severe vibration impact on the rail under the high-speed operation of the train. The impact of this The frequency is fixed and the intensity is high, which radiates extremely strong wheel-rail noise, which greatly reduces the ride comfort...

AI Technical Summary

Problems solved by technology

Therefore, when the compression properties of rubber are used as the elasticity of the rail vibration absorber, due to the limitation of the installation space, the size of the rubber material cannot be increased, making it difficult to reduce its stiffness, and it is difficult to lower the resonance frequency of the corresponding rail vibration absorber products. Existing The resonant frequency of rail vibration absorber products is generally above 250Hz

[0004] However, the existing technology can only adjust the vibration frequency in the vertical and transverse directions in the rail section, but the actual on-site line status and the wheel-rail interaction are complex, especially when the state of the wheel flange of the vehicle is greatly different, the train absorbs vibration through the rail. When the vibration absorber is installed on the cross section, the main frequency direction of the rail vibration varies greatly. The existing rail vibration absorber products cannot adapt to the change of the main frequency direction of the vibration, which makes the vibration absorption effect uneven.

[0005] Once the existing rail vibration absorber products are produced, their inherent vibration characteristics are formed, and no parameter adjustment can be performed. At this time, if the rail corrugation form (wavelength) or the vehicle operation diagram is adjusted, the vehicle speed will change, making the characteristic frequency (vehicle speed / wavelength) changes, the vibration absorber product will lose the vibration attenuation effect of the characteristic frequency, and even cause vibration amplification

It can only be replaced with a newly designed rail vibration absorber product to adapt to the change of characteristic frequency, resulting in waste of labor and materials

[0006] At the same time, the elastic material of the existing rail vibration absorber products is exposed. When used in the open air, it is affected by harsh environments such as high temperature, cold, rain, snow, and sunlight, which will cause aging and denaturation, lose the original design elasticity, and reduce the overall durability of the product. , the life is shortened, the vibration absorption effect is lost, and even the vibration of the rail is amplified

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