Damping support base for rail

Abstract

The invention discloses a damping support base for a rail. The damping support base comprises a base, a rail support base, a damping spring supported between the base and the rail support base and a damper which is arranged in the base for applying damping effect on vibration of the rail support base, wherein the damper comprises an outer cylinder barrel, an inner cylinder barrel coaxially arranged in the outer cylinder barrel, a piston body which is in sliding fit to the inner cylinder barrel and a piston rod which is connected between the piston body and the rail support base, wherein the piston body comprises a barrel-shaped housing which is provided with a lower opening and is made of a permeability magnetic material, a central column which is coaxially and integrally formed in a barrel-shaped outer housing, a magnet exciting coil which is wound on the central column and a bottom cover for sealing the bottom of the barrel-shaped housing; oil flows through the piston rod through a transverse oil pass hole; and the inner wall of the transverse oil pass hole is fixedly provided with a throttling body made of a magnetostrictive material. Damping strength of the damper in the damping support base can be actively regulated according to needs, so that damping needs of the rail are met.

Description

technical field [0001] The invention relates to the field of vibration-damping equipment, in particular to a vibration-damping support for rails. Background technique [0002] In recent years, my country's urban rail transit has developed rapidly, and the environmental vibration problem caused by subway operation has become increasingly serious. At present, the vibration reduction measures adopted for the track structure mainly include vibration reduction fasteners, vibration reduction sleepers and vibration reduction ballast beds. Among them, the steel spring floating slab track is the track structure with the best vibration reduction effect at present. However, in the prior art, the damping strength of the damper built into the steel spring cannot be adjusted according to actual needs. If the damping effect of the damper is small, the vibration of the floating plate near the fundamental frequency of 10 Hz will be significantly amplified. , the vibration reduction effect ...

AI Technical Summary

Problems solved by technology

However, in the prior art, the damping strength of the damper built into the steel spring cannot be adjusted according to actual needs. If the damping effect of the damper is small, the vibration of the floating plate near the fundamental frequency of 10 Hz will be significantly amplified. , the vibration reduction effect in the frequency range (4 ~ 10Hz) that is most harmful to the human body is not satisfactory.

The main frequency of the vibration of the floating plate track is located at the fundamental frequency of the floating plate. If the damping ratio of the vibration isolation system can be used to reduce the vibration of the fundamental frequency, the vibration damping effect of the high frequency will also be affected.

Images