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Non-linear combined spring vibration isolator

A combined vibration isolator technology, applied in the directions of roads, tracks, buildings, etc., can solve the problems of difficulty in raising and leveling the floating ballast bed, limitation of the overall vibration isolation effect, and high natural frequency of the system, so as to improve the overall vibration isolation effect, Good overall vibration reduction and noise reduction effect, low natural frequency effect

Inactive Publication Date: 2018-12-28
GERB QINGDAO VIBRATION CONTROL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing steel spring vibration isolation devices are all designed to provide linear elastic bearing capacity. For safety considerations, their vertical stiffness is relatively large, and the amount of compression during work is small. According to "CJJ-T191-2012 Floating Plate Track "Technical Specifications" requires that "the maximum vertical displacement of the floating plate under the rated load of the train should not exceed 3mm", therefore, the compression of the steel spring vibration isolation device under working conditions generally does not exceed 3mm
The problems caused by this include: (1) The spring stiffness is large, the compression amount is small during operation, and the natural frequency of the system is high, so it is difficult to fully adapt to the vibration control requirements under the changing dynamic load conditions when the rail vehicle passes by. Only a certain value of the spring can be compressed to achieve a good vibration and noise reduction function, resulting in a good vibration isolation effect for the local section that is carrying the rail vehicle, and the vibration isolation effect for the insufficiently loaded section is limited, and the overall vibration isolation effect is limited; ( 2) Under non-working conditions, when only the floating slab is supported, due to the small load, the static compression of the steel spring vibration isolation device is too small, sometimes even less than 1mm, which makes it difficult to adjust the height and level of the floating ballast bed, and the construction efficiency is low

Method used

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  • Non-linear combined spring vibration isolator
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  • Non-linear combined spring vibration isolator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 The nonlinear combined elastic vibration isolator shown in the present invention includes an upper shell 1, a lower shell 2 and an elastic element, the elastic element is placed between the lower shell 1 and the lower shell 2, and the elastic element includes a static load Support spring 4 and joint support spring 3, wherein, static load support spring 4 and joint support spring 3 are helical steel springs, the stiffness of static load support spring 4 is less than the stiffness of joint support spring 3, and joint support spring 3 is set in static The load support spring 4 is outside, and the top surface of the static load support spring 4 is higher than the top surface of the joint support spring 3, the static load support spring 4 supports the upper casing 1; the lower casing 2 is provided with a damping material 8, and the static load The support spring 4 and the combined support spring 3 are partially placed in the damping material 8, and the dampi...

Embodiment 2

[0027] Such as figure 2 The difference between the nonlinear combined elastic vibration isolator of the present invention and the first embodiment is that the partial surface of the static load support spring 4 is provided with a solid damping structure, and the solid damping structure is specifically sleeved on the static load support spring 4 A rubber sleeve 9 on the local outer surface; in addition, a support 6 for height compensation is provided under the static load support spring 4, and the support 6 is firmly connected with the lower housing 2 as a whole. At this time, the static load support spring 4 The centering and locating member includes the inner centering and locating ring 7 correspondingly provided on the upper shell 1 and the support 6 .

[0028]Compared with Embodiment 1, in the technical solution described in this example, a rubber sleeve 9 is added to the partial outer surface of the static load support spring 4, which can effectively improve the system da...

Embodiment 3

[0030] Such as Figure 4 The nonlinear combined elastic vibration isolator of the present invention shown, and image 3 The difference of the technical solution shown is that the lower housing 2 is only composed of a bottom plate, and the joint support spring 3 and the static load support spring 4 are placed on the lower housing 2; in addition, the partial surface of the joint support spring 3 is provided with a solid damping structure, specifically Yes, the solid damping structure is an elastic polyurethane layer 11 integrated with the partial surface of the support spring 3 .

[0031] Compared with the second embodiment, the technical solution described in this example involves fewer components, a simpler structure, and more convenient maintenance and replacement. Of course, similar to the description of the solid damping structure provided on the surface of the static load support spring 4 in Embodiment 2, the manner in which the solid damping structure is provided on the ...

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PUM

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Abstract

The invention belongs to the technical field of vibration and noise reduction of rail transit, in particular to a steel spring vibration isolator which can provide nonlinear elastic bearing capacity.The invention solves the problems of poor vibration control effect and low leveling construction efficiency of the floating ballast bed system under the condition of varying dynamic load. At least oneof that static load support spr and the combined support spring respectively comprises a helical steel spring, A static load bearing spring and a combined bearing spring are arranged in parallel or the combined bearing spring is sleeved outside the static load bearing spring, and the static bearing spring supports the upper shell, at least a part of the combined bearing spring is provided with asolid damping structure, or the lower shell is provided with a damping material, and the combined bearing spring is at least partially arranged in the damping material; The invention has the advantages of simple structure, strong adaptability to dynamic load change and good vibration isolation performance, and can be widely applied to complex vibration isolation engineering where dynamic load is easy to change.

Description

technical field [0001] The invention belongs to the technical field of vibration reduction and noise reduction for rail transit, and specifically relates to a steel spring vibration isolation device that can provide nonlinear elastic bearing capacity. Background technique [0002] Vibration isolation and damping have always been the core issues of urban rail transit and construction. Floating ballast bed technology is widely used to solve vibration isolation and damping problems. Among them, the floating ballast bed system based on the steel spring vibration isolation device has been recognized in the industry due to its good vibration isolation effect, long service life, and stable vibration isolation effect, and has been widely used in rail transit lines in many countries and cities middle. However, the existing steel spring vibration isolation devices are all designed to provide linear elastic bearing capacity. For safety considerations, their vertical stiffness is rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B19/00
CPCE01B19/00
Inventor 尹学军王建立范利辉孔祥斐王乾安薛松尚旭东王永国赵忠安
Owner GERB QINGDAO VIBRATION CONTROL
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