Nonlinear damping vibration isolator, floating slab with nonlinear damping vibration isolator and floating slab track system

A vibration isolator and non-linear technology, applied in the field of track vibration and noise reduction, can solve problems such as increased track structure displacement, potential safety hazards of train operation, and reduced vibration impact, achieving good vibration and noise reduction performance, simple and reliable structure , weaken the effect of vibration

Pending Publication Date: 2020-11-20
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limit and cost of the railway infrastructure, as one of the key components of the track structure, the increase in the mass of the track slab has a limited vibration reduction effect; if the stiffness of the track structure is reduced, the natural frequency can be reduced, but the stiffness is too large. Then the displacement of the track structure will increase, which will bring hidden dangers to the safety of train operation, so it is impossible to further reduce the impact of vibration in the low frequency range through the above methods

Method used

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  • Nonlinear damping vibration isolator, floating slab with nonlinear damping vibration isolator and floating slab track system
  • Nonlinear damping vibration isolator, floating slab with nonlinear damping vibration isolator and floating slab track system
  • Nonlinear damping vibration isolator, floating slab with nonlinear damping vibration isolator and floating slab track system

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Comparison scheme
Effect test

Embodiment 1

[0034] Refer to the attached Figures 1 to 8 , according to an embodiment of the present invention, a nonlinear damping vibration isolator for installation in the floating plate 1, the nonlinear damping vibration isolator 4 includes a fixed part, and the fixed part includes a base 14, a damping cylinder part 13 and a sleeve 15 , the damping cylinder part 13 is fixed in the middle of the base 14; the sleeve 15 is correspondingly located outside the damping cylinder part 13 and fixed along the peripheral side of the base 14;

[0035] The moving part, the moving part includes a top cover 12, a steel spring 10 and a damping piston 11. The top cover 12 is located above the sleeve 15 and is connected with the upper end of the sleeve 15 through a sealing member 16; the steel spring 10 is sleeved on the damping cylinder part 13 Between the sleeve 15 and its upper and lower ends correspond to the top cover 12 and the base 14; one end of the damping piston 11 is fixed to the top cover 1...

Embodiment 2

[0044] When the peripheral diameter of cylinder body 131 gradually increases from top to bottom, the diameter of the corresponding damping hole 132 on cylinder body 131 decreases from top to bottom, and damping chamber B is formed in damping cylinder part 13, and steel spring 10 A damping gap C is formed in the damping liquid between the cylinder 131 and the sleeve 15. When the top cover of the vibration isolator moves down, it drives the damping piston 11 to move down. Since the outer diameter of the cylinder 131 increases gradually from top to bottom Therefore, the damping gap C between the steel spring 10 and the cylinder 131 decreases gradually, the relative flow rate of the damping fluid decreases gradually, the corresponding damping force and damping coefficient increase relatively, and the diameter of the damping hole 132 changes from above to It decreases successively from bottom to bottom, so when the damping piston 11 moves downward, the relative flow rate inside and ...

Embodiment 3

[0046] When the peripheral diameter of the cylinder 131 increases first and then decreases from top to bottom, the corresponding aperture diameter of the damping hole 132 on the cylinder 131 decreases first and then increases from top to bottom, and the inside of the damping cylinder 13 is formed In the damping chamber B, the steel spring 10 forms a damping gap C in the damping liquid between the cylinder 131 and the sleeve 15. When the top cover of the vibration isolator moves down, it drives the damping piston 11 to move down. Due to the outer diameter of the cylinder 131 From top to bottom, it first increases and then decreases. Therefore, the damping gap C between the steel spring 10 and the cylinder 131 first gradually decreases and then gradually increases. The relative flow rate of the damping fluid first gradually decreases and then gradually increases. increases, the corresponding damping force and damping coefficient first increase and then decrease, and the diameter ...

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PUM

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Abstract

The invention discloses a non-linear damping vibration isolator, a floating slab with the nonlinear damping vibration isolator and a track system . The non-linear damping vibration isolator comprisesa fixing part and a moving part. The fixing part comprises a base, a damping cylinder part and a sleeve, and the damping cylinder part is fixed in the middle of the base; the sleeve is correspondinglypositioned outside the damping cylinder part and is fixed along the peripheral side of the base; the moving part comprises a top cover, a steel spring and a damping piston, and the top cover is located above the sleeve and movably connected with the upper end of the sleeve in a sealed mode; the steel spring is sleeved between the damping cylinder part and the sleeve, and the upper and lower endsof the steel spring correspondingly abut against the top cover and the base; one end of the damping piston is fixed with the top cover and the other end is positioned in the damping cylinder part; a damping hole is formed in a cylinder body of the damping cylinder part, the linear distance between the cylinder body and the inner wall of the sleeve is gradually changed, and damping liquid is contained in the damping cylinder part and the sleeve. The variable damping characteristic of the vibration isolator can be achieved, the resonance peak of the vibration isolator is reduced and the high-frequency load is not amplified, vibration of a roadbed slab is weakened, and meanwhile noise is lowered.

Description

technical field [0001] The invention relates to the technical field of rail vibration reduction and noise reduction, in particular to a nonlinear damping vibration isolator and a floating plate rail system with the same. Background technique [0002] In order to reduce the environmental vibration and noise caused by subway operation, a large number of urban rails have adopted vibration-damping rails, among which steel spring floating slab rails have the best vibration-damping effect. However, studies have shown that the steel spring floating slab track has an obvious damping effect on the vibration of the conventional frequency band above 20Hz, but for the low-frequency vibration of the subway, its vibration damping effect is not ideal, and vibration components may even appear in the low frequency band Magnification phenomenon. [0003] Due to the low frequency and relatively long wavelength, the low-frequency part of the vibration has a strong ability to pass through strat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B19/00E01B1/00E01B2/00
CPCE01B1/00E01B2/00E01B19/00
Inventor 杜香刚肖俊恒王继军郭有松刘韦朱光楠刘伟斌施成于毫勇严卫民孙照亮朱继光陈晨贺志文
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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