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Multi-dimensional vibration isolation device and vibration isolation method for slab ballastless track

A slab-type ballastless track and isolation technology, applied in tracks, roads, buildings, etc., can solve the problems of large vertical displacement of the track, great impact on the safety of high-speed rail, and high construction cost, and achieve improved energy consumption and good vibration isolation performance. and energy consumption, easy maintenance and replacement effect

Active Publication Date: 2021-03-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the steel spring vibration isolator is easy to cause excessive vertical displacement of the track, which has a great impact on the safety of high-speed railway operation, and the cost is high, so it has not been widely used in high-speed railway ballastless track

Method used

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  • Multi-dimensional vibration isolation device and vibration isolation method for slab ballastless track
  • Multi-dimensional vibration isolation device and vibration isolation method for slab ballastless track
  • Multi-dimensional vibration isolation device and vibration isolation method for slab ballastless track

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Such as Figure 1 to Figure 3 As shown, what the present invention describes is a multi-dimensional vibration isolation device for a plate-type ballastless track, which consists of an upper end cover 1, a ring-shaped vibration-damping pad 2, a pre-pressed disc spring group 3, an inner viscoelastic material block 4, an outer The viscoelastic material block 5 and the base 6 are composed of six major parts. The inner viscoelastic material block 4 , the disc spring group 3 and the outer viscoelastic material block 5 are placed from the center of the base 6 to the periphery in order to play the role of damping vibration in the vertical direction. The ring-shaped damping pad 2 is connected with the upper end cover 1 through bolts 8 and nuts 9 to play a role of horizontal vibration damping.

[0051] Such as figure 1 and Figure 4 As shown, the upper end cover 1 includes a top plate 1-1, an upper outer cylinder 1-2, a central pressing shaft 1-3, a first pressing cylinder 1-4...

example 1

[0059] Example 1 of the present invention The working method of a multi-dimensional insulation and damping device for plate-type ballastless track is:

[0060] The upper end cover 1 is used to support the slab ballastless track, the base 6 is fixed on the ballastless track base, and the device is first compressed by a large value during installation;

[0061] When there is no vehicle load, under the action of static loads such as slab ballastless tracks, rails and fasteners, the compressed disc spring group 3 recovers and deforms, and the upper end cover 1 moves upward through the first pressure cylinder 1-4 until it reaches the ring shape. The top surface of the inner bump 1-5 is in contact with the bottom surface of the outer bump on the top of the lower outer cylinder 6-3, and there is a first vertical separation distance a between the bottom surface of the central pressing shaft 1-3 and the top surface of the inner viscoelastic material block 4, At the same time, the secon...

Embodiment 2

[0068] In this embodiment, the disc spring group 3 is replaced by a paired and superimposed form.

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Abstract

The invention relates to a plate-type ballastless track multi-dimensional vibration isolation device and a vibration reduction method thereof. The device includes an upper end cover, a ring-shaped vibration damping pad, a viscoelastic material block and a base. The ring-shaped damping pad isolates and weakens the vibration in the horizontal direction. When the train load is small, the first pressure cylinder of the upper end cover squeezes the disc spring group, and the second pressure cylinder under the ring-shaped damping pad squeezes the outer viscoelastic material block, and the disc spring group and the outer viscoelastic material block are vertically aligned together. Vertical vibrations are isolated and attenuated. When the load of the train is large, the central pressing shaft of the upper end cover contacts and squeezes the inner viscoelastic material block, and the inner viscoelastic material block participates in the work to improve the working performance of the vibration isolation device. Vertical displacement is limited. The invention can simultaneously exert the function of isolating and reducing vibration in the vertical and horizontal directions, and ensures good working performance under different train loads.

Description

technical field [0001] The invention relates to a multi-dimensional isolation and vibration reduction device for a plate-type ballastless track and a vibration reduction method thereof. Background technique [0002] The track structure of high-speed railways generally adopts ballastless track with good stability. However, ballastless track has high stiffness and high natural frequency, and there are relatively large vibration and noise problems. When a high-speed railway train is running, the wheels and rails are in contact with each other, the track is not smooth, and other wheel-rail disturbances cause the ballastless track structure and trains to vibrate and generate noise at the same time. Track vibration will aggravate train vibration and affect the safety and comfort of train operation. Vibration energy and noise will be transmitted down along the ballastless track, causing secondary vibration and noise of railway bridges, tunnels, underground structures and adjacent b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B19/00
CPCE01B19/00E01B19/003
Inventor 徐赵东崔可萌黄兴淮
Owner SOUTHEAST UNIV
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