A rubber shock absorber with high dynamic and static stiffness ratio for high-speed trains

Abstract

The invention discloses a high dynamic stiffness-static stiffness ratio rubber shock absorber used in a high speed train. The high dynamic stiffness-static stiffness ratio rubber shock absorber used in the high speed train comprises a metal cover, a metal pin bush and a vulcanized rubber layer. The vulcanized rubber layer is attached between the metal cover and the metal pin bush. The cross section of the inner wall of the metal cover is an inclined plane. The cross section of the inner wall of the metal pin bush is an inclined plane. The vulcanized rubber layer is an annular cone. The shock absorber can obtain different stiffness performances by adjusting the degree of the inclined angle of the cross section of the inner wall of the metal cover. Due to the fact that the vulcanized rubber layer is of a uniform thickness structure, influence on service life of the shock absorber caused by larger local stress is avoided when the shock absorber is used. The high dynamic stiffness-static stiffness ratio rubber shock absorber has a larger dynamic stiffness and a smaller static stiffness and can perform the function of shock isolation, noise reduction and shock attenuation well.

Description

technical field [0001] The invention relates to a shock absorber component suitable for use in high-frequency vibration suspension equipment systems, in particular to a rubber elastic shock absorber mainly used for high-speed train suspension electrical equipment, especially suitable for high-frequency vibration The suspension equipment system of the invention can also be applied to construction machinery equipment at the same time, and belongs to the technical field of mechanical engineering. Background technique [0002] The lower part of the high-speed train car body is usually equipped with many key functional equipment, such as transformers and cooling units, batteries and traction converters. Such equipment will generate high-frequency vibrations greater than 50Hz during normal operation, especially when starting Its natural frequency is as high as 100Hz. Many similar devices are usually directly connected and fixed to the car body by bolt rigid connection. Although t...

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Problems solved by technology

However, the static stiffness of the component should not be too small, otherwise the system will be unstable; at the same time, the dynamic stiffness of the component should not be too large, as the vibration of the equipment will be completely restricted if the dynamic stiffness is too large, resulting in a short service life of the equipment.

However, the ratio of dynamic stiffness to static stiffness of ordinary rubber shock absorbers is usually around 1.1~1.6, and the difference between dynamic stiffness and static stiffness is not big, which cannot satisfy the functions of vibration isolation, noise reduction and vibration reduction at the same time.

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