CN117344585A - Track bed vibration damping pad for track traffic - Google Patents
Track bed vibration damping pad for track traffic Download PDFInfo
- Publication number
- CN117344585A CN117344585A CN202311471629.XA CN202311471629A CN117344585A CN 117344585 A CN117344585 A CN 117344585A CN 202311471629 A CN202311471629 A CN 202311471629A CN 117344585 A CN117344585 A CN 117344585A
- Authority
- CN
- China
- Prior art keywords
- boss structure
- pad
- small
- bed vibration
- damping pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000013016 damping Methods 0.000 title claims abstract description 42
- 229920001971 elastomer Polymers 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 7
- 230000008092 positive effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- YBJHBAHKTGYVGT-ZKWXMUAHSA-N (+)-Biotin Chemical compound N1C(=O)N[C@@H]2[C@H](CCCCC(=O)O)SC[C@@H]21 YBJHBAHKTGYVGT-ZKWXMUAHSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- FEPMHVLSLDOMQC-UHFFFAOYSA-N virginiamycin-S1 Natural products CC1OC(=O)C(C=2C=CC=CC=2)NC(=O)C2CC(=O)CCN2C(=O)C(CC=2C=CC=CC=2)N(C)C(=O)C2CCCN2C(=O)C(CC)NC(=O)C1NC(=O)C1=NC=CC=C1O FEPMHVLSLDOMQC-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/681—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material
- E01B9/683—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material layered or composite
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
Abstract
The invention discloses a ballast bed vibration damping pad for track traffic, which comprises a backing plate base body and a plurality of boss structures arranged on one side surface of the backing plate base body, wherein the boss structures comprise large boss structures distributed at the center stress position of the ballast bed vibration damping pad and small boss structures surrounding the large boss structures. Compared with the prior art, the invention has the following positive effects: after long-time service, the track bed vibration damping pad provided by the invention has slow rigidity change of a large boss structure, and has a slow thinning speed and long service life compared with the center position of the track bed vibration damping pad with a plurality of boss structures with the same size. In addition, as the load gradually increases, the contact area of the roadbed and the boss of the vibration reduction pad is small, and then the contact area gradually increases slowly, compared with the conventional roadbed vibration reduction pad with the same size and a plurality of boss structures, the vibration reduction pad has slow rigidity change, can provide a certain vibration reduction and noise reduction effect, has small train settlement amplitude, and improves passenger comfort.
Description
Technical Field
The invention relates to a ballast bed vibration-damping pad for rail transit.
Background
The ballast bed vibration damping pad is a vibration damping product controlled by a vibration source, has the characteristics of safety, economy, reliability and the like, and is a rail transit vibration damping and noise reducing product commonly applied at present. The ballast bed vibration-damping pad can be divided into rubber and polyurethane according to materials. The polyurethane ballast damping pad structure is not designed with safe rigidity, so the rubber ballast damping pad is more popular among the public.
When the rubber vibration-damping pad is used, the stressed position is the center of the vibration-damping pad, the central position is stressed to deform and the material is thinned under the action of long-time force, the material is extruded to the edge position, the vibration amplitude is reduced at the thinned position, the rigidity change is slow, and the vibration-damping effect is poor.
The ballast pad structure in the prior art Chinese patent CN204435131U is a vibration reduction pad plate and vibration reduction protrusions, and the protrusions at the middle positions are easy to thin and squeeze to the edge positions under the action of stress. In the structure of Chinese patent CN217231297U, besides a vibration reduction base plate and vibration reduction protrusions, grooves are formed in the base plate, the middle protrusions are easy to thin, and water is easy to accumulate in the grooves in the base plate.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the track bed vibration-damping pad for the rail transit, which has the advantages of simple structure and reasonable design, solves the technical problem of thinning of the material at the middle position of the rubber vibration-damping pad caused by long-time service, and prolongs the service life; meanwhile, the rigidity change is slow, the train sedimentation amplitude is small, and the comfort of passengers is good.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a track is railway roadbed damping pad, includes backing plate base member and a plurality of boss structures that set up in a side of backing plate base member, boss structure is including distributing the big boss structure and the little boss structure of enclosing around big boss structure in the central atress position of railway roadbed damping pad.
Compared with the prior art, the invention has the following positive effects:
the boss structure of the conventional ballast bed vibration damping pad is a plurality of boss structures with the same size, the center position is stressed to deform after long-time use, the rubber material is thinned, the material is extruded to the edge position, the edge is thickened, the vibration amplitude can be reduced at the thinned position, and the vibration damping and noise reduction effects of the vibration damping pad are reduced. Meanwhile, the existing ballast bed vibration damping pad has large rigidity transition, can provide good vibration damping and noise reduction effects, but has large train settlement amplitude and poor passenger comfort.
Aiming at the defects, the track bed vibration reduction pad is provided with a plurality of small boss structures and a plurality of large boss structures which are alternately arranged. After long-time service, the rigidity change of the large boss structure is slow, and compared with the center position thinning speed of the conventional ballast bed vibration damping pad with a plurality of boss structures with the same size, the large boss structure has the advantages of slow thinning speed and long service life. In addition, as the load gradually increases, the contact area of the roadbed and the boss of the vibration reduction pad is small, and then the contact area gradually increases slowly, compared with the conventional roadbed vibration reduction pad with the same size and a plurality of boss structures, the vibration reduction pad has slow rigidity change, can provide a certain vibration reduction and noise reduction effect, has small train settlement amplitude, and improves passenger comfort.
Drawings
The invention will now be described by way of example and with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a first track bed vibration reduction pad for rail transit;
FIG. 2 is a schematic diagram of a second track bed vibration reduction pad for track traffic;
FIG. 3 is a graph showing the stiffness of the ballast damping pad according to the present invention compared with the conventional ballast damping pad.
Detailed Description
A track bed vibration reduction pad for rail transit, as shown in fig. 1 and 2, comprising: including backing plate base member 1, little boss structure 2, big boss structure 3, wherein:
a plurality of small boss structures 2 and a plurality of large boss structures 3 are alternately arranged on one side surface of the base body 1 of the base plate at intervals. The small boss structure 2, the large boss structure 3 and the backing plate base body 1 are formed by molding a whole piece of rubber. The large boss structure 3 has larger rigidity than the small boss structure 2, the rigidity change is slow under the load effect, a certain vibration reduction and noise reduction effect can be provided, meanwhile, the sedimentation amplitude of the train can be reduced, and the comfort of passengers is improved; and the large boss structure 3 is distributed at the center stress position of the vibration damping pad, so that the deformation thinning speed of the center position is reduced, and the service life is prolonged.
The small boss structure 2 and the large boss structure 3 are conical truncated platforms or rectangular pyramid truncated platforms, as shown in fig. 1 and 2, respectively. The small boss structure and the large boss structure have the same height.
The bottom circle diameter or the bottom side length of the large boss structure is 2 times of the bottom circle diameter or the bottom side length of the small boss structure, and the distance between the two small bosses is added.
The top surface area of the large boss structure is 4 times that of the small boss structure.
The ballast bed vibration damping pad is made of elastomer fiber composite materials synthesized by compounding one or more fiber woven layers and rubber layers.
Fig. 3 shows a graph of comparing the stiffness of the ballast damping pad provided by the invention with that of the conventional ballast damping pad (in the graph, a is the ballast damping pad of the invention, and B is the conventional ballast damping pad formed by a plurality of same boss structures), so that better damping and noise reduction effects can be provided. Calculating the rigidity K of the rubber backing plate during small deformation c The following empirical formula is generally used for calculation:
K c ＝EKA L /h
wherein E is the initial modulus of elasticity of the rubber backing plate, e=3g;
shear modulus of the G-rubber material;
A L -the pressure area of the rubber pad;
h, the thickness of the rubber backing plate;
k-a coefficient determined by the shape of the rubber pad, k=f (S);
s-shape factor, which has the value:
S＝A L /A F
wherein A is F -free side area.
According to the japanese clothing section, wu Jinggong, the calculation is performed for a cylindrical pad:
K c ＝1+1.65S 2
by calculating the shape coefficient S of the ballast bed vibration-damping pad A A Shape factor S of vibration-damping pad B with existing ballast bed B Is equal to about 1. Therefore, the ballast bed vibration damping pad A provided by the invention has similar rigidity to the conventional ballast bed vibration damping pad B, and can realize the increase of service life and the improvement of train comfort.
Claims (9)
1. The utility model provides a track traffic is with railway roadbed damping pad which characterized in that: the base plate comprises a base plate body and a plurality of boss structures arranged on one side surface of the base plate body, wherein the boss structures comprise large boss structures distributed at the center stress position of a ballast damping pad and small boss structures surrounding the large boss structures.
2. The track bed vibration pad for rail transit of claim 1, wherein: the heights of the small boss structure and the large boss structure are the same.
3. The track bed vibration pad for rail transit of claim 1, wherein: the top surface area of the large boss structure is 4 times that of the small boss structure.
4. The track bed vibration pad for rail transit of claim 1, wherein: the small boss structure, the large boss structure and the backing plate base body are formed by molding a whole piece of rubber.
5. The track bed vibration pad for rail transit of claim 1, wherein: the small boss structure and the large boss structure are conical truncated platforms.
6. The track bed vibration pad for rail transit of claim 5, wherein: the diameter of the bottom circle of the large boss structure is 2 times of the diameter of the bottom circle of the small boss structure, and the distance between the two small bosses is added.
7. The track bed vibration pad for rail transit of claim 1, wherein: the small boss structure and the large boss structure are both rectangular pyramid truncated platforms.
8. The track bed vibration pad for rail transit of claim 7, wherein: the side length of the bottom surface of the large boss structure is 2 times of the side length of the bottom surface of the small boss structure, and the distance between the two small bosses is added.
9. The track bed vibration pad for rail transit of claim 1, wherein: the ballast bed vibration damping pad is made of elastomer fiber composite materials synthesized by compounding one or more fiber woven layers and rubber layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311471629.XA CN117344585A (en) | 2023-11-07 | 2023-11-07 | Track bed vibration damping pad for track traffic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311471629.XA CN117344585A (en) | 2023-11-07 | 2023-11-07 | Track bed vibration damping pad for track traffic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117344585A true CN117344585A (en) | 2024-01-05 |
Family
ID=89361389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311471629.XA Pending CN117344585A (en) | 2023-11-07 | 2023-11-07 | Track bed vibration damping pad for track traffic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117344585A (en) |
-
2023
- 2023-11-07 CN CN202311471629.XA patent/CN117344585A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |