Vibration isolation system for tracks in tunnels

Abstract

The present invention discloses a vibration isolation system for tracks in tunnels, which supports the track plate of the track system through vibration isolation, thereby isolating or reducing the transmission of vibration caused by the impact of the wheel contacting the track to the tunnel foundation, thereby reducing noise. Among them, due to the provision of a first vibration reduction mechanism for torsional vibration reduction and a second vibration reduction mechanism for floating vibration reduction and annular spring vibration reduction, higher vibration isolation requirements can be effectively met.

Description

Technical Field

[0001] The present invention relates to a vibration isolation system for tracks in tunnels, comprising a vibration isolation support device for supporting a track plate of the track system, wherein the vibration isolation support device comprises at least a first vibration reduction mechanism and a second vibration reduction mechanism, wherein the first vibration reduction mechanism comprises a pressure plate and a vertical rod connected to the pressure plate, wherein the vertical rod can move in a vertical direction when the pressure plate is subjected to a vertical load, the first vibration reduction mechanism also comprises a conversion sleeve and a torsional vibration damper, wherein the conversion sleeve is disposed on the vertical rod, the conversion sleeve can receive the vertical movement of the vertical rod and can convert the vertical movement of the vertical rod into the rotational movement of a rotating disk of the torsional vibration damper; the second vibration reduction mechanism comprises a lower annular spring body, a middle annular spring body and an upper annular spring body, wherein the lower annular spring body abuts against a housing of the torsional vibration damper in a vertical direction, the middle annular spring body is float-supported on the lower annular spring body through at least two groups of floating spring assemblies, the upper annular spring body is attached to the pressure plate and can be contacted and extruded with the middle annular spring body to generate elastic deformation when the pressure plate is subjected to a vertical load, and the vertical rod passes through the second vibration reduction mechanism from top to bottom and is connected and matched with the conversion sleeve. Background Art

[0002] With the development of social economy and the progress of science and technology, various forms of transportation lines (such as subways, light rails and viaducts, etc.) have sprung up like mushrooms after rain. Although the emergence of rail transit has greatly alleviated traffic pressure, the environmental problems that have emerged have also gradually increased. The most notable of these is the noise problem. In the tunnel, a certain amount of impact will be generated during the contact between the wheel and the track, which will produce vibration and noise. Especially in the tunnel, the vibration and noise will be amplified. If effective measures are not taken, it will not only reduce the comfort of passengers, but also reduce the service life of various parts of the vehicle. At the same time, it will also affect the work and life quality of residents along the railway and the life of various equipment and buildings. The vibration reduction and noise reduction system of the rail system adopts various technical measures such as vibration reduction rail connectors, high elastic rail fasteners, rail vibration dampers and spring floating plate roadbeds, and each has achieved certain results. So far, the spring floating plate roadbed has a better effect, but it still cannot meet the requirements in certain occasions where the vibration isolation requirements for vibration equipment are very high.

[0003] Therefore, it is necessary to improve the existing vibration isolation system for tunnel tracks so that it can effectively isolate the vibration caused by the impact of the contact between the wheels and the track from being transmitted to the tunnel foundation, thereby reducing noise. Summary of the invention

[0004] In view of this, the present invention provides a vibration isolation system for tracks in tunnels, which has multi-level vibration isolation and can meet occasions with higher vibration isolation requirements. Its own structure can further attenuate vibration transmission on the basis of the multi-level vibration isolation structure, thereby making the transmission ratio smaller and the vibration isolation effect better.

[0005] The present invention discloses a vibration isolation system for tracks in tunnels, comprising a base installed on a tunnel foundation and a vibration isolation support device arranged on the base and supporting a track plate of a track system, wherein the vibration isolation support device comprises at least a first vibration reduction mechanism and a second vibration reduction mechanism, wherein the first vibration reduction mechanism comprises a pressing plate and a vertical rod connected to the pressing plate, wherein the vertical rod can move in a vertical direction when the pressing plate is subjected to a vertical load, and the first vibration reduction mechanism also comprises a conversion sleeve and a torsional vibration damper, wherein the conversion sleeve is disposed on the vertical rod, wherein the conversion sleeve can accept the vertical movement of the vertical rod and can convert the vertical movement of the vertical rod into a torsional vibration damper. The vertical movement of the rod is converted into the rotational movement of the rotating disk of the torsional vibration damper; the second vibration damping mechanism includes a lower annular spring body, a middle annular spring body and an upper annular spring body, the lower annular spring body is against the outer shell of the torsional vibration damper in the vertical direction, the middle annular spring body is floated and supported on the lower annular spring body by at least two groups of floating spring assemblies, the upper annular spring body is attached to the pressure plate and can be contacted and squeezed with the middle annular spring body to generate elastic deformation when the pressure plate is subjected to a vertical load, and the vertical rod passes through the second vibration damping mechanism from top to bottom and is connected and matched with the conversion sleeve.

[0006] Furthermore, the conversion sleeve includes a vertical groove and an arc groove connected to the vertical groove. A radial protrusion is provided on the vertical rod, and the radial protrusion is located in the vertical groove. When subjected to a vertical load, the vertical rod can move downward along the vertical groove to enter the arc groove, and after entering the arc groove, move along the arc groove to force the conversion sleeve to rotate around its own axis.

[0007] Furthermore, the upper annular spring body includes a first outer conical surface portion, and the upper part of the middle annular spring body is provided with a first inner conical surface portion. When the pressure plate is subjected to a vertical load, the first outer conical surface portion of the upper annular spring body can contact with the first inner conical surface portion of the middle annular spring body and squeeze each other to form elastic deformation; and / or, the lower part of the middle annular spring body is provided with a second inner conical surface portion. When the floating spring assembly is compressed under the vertical load, the second inner conical surface portion of the middle annular spring body can contact with the second outer conical surface portion of the lower annular spring body and squeeze each other to form elastic deformation.

[0008] Furthermore, the floating spring assembly includes a first supporting spring body, a supporting rod passing through the first supporting spring body, and a first supporting plate fixed to the supporting rod by a sleeve, one end of the supporting rod is fixed to the lower annular spring body, and the other end is inserted into the bottom slot of the middle annular spring body, the bottom support of the first supporting spring body is arranged on the lower annular spring body, the first supporting plate is against the top of the first supporting spring body, and the first supporting plate and the bottom of the middle annular spring body are arranged in a manner of reserving a first travel gap in the vertical direction.

[0009] Furthermore, a second travel gap is vertically reserved between the bottom of the lower annular spring body and the bottom of the middle annular spring body, and the second travel gap is larger than the first travel gap.

[0010] Furthermore, the upper annular spring body and the pressure plate are a one-piece structure.

[0011] Furthermore, the conversion sleeve and the rotating plate of the torsional vibration damper are a one-piece structure.

[0012] Furthermore, the conversion sleeve is at least partially located inside the lower annular spring body.

[0013] Furthermore, the vibration isolation system also includes a third vibration damping mechanism, which includes a second support spring body and a second support plate. The second support plate outer sleeve is fixedly set on the vertical rod, the second support spring body outer sleeve is set on the vertical rod, and the upper end of the second support spring body abuts against the second support plate, and the lower end abuts against the outer shell of the torsional vibration damper.

[0014] Furthermore, it also includes a noise reduction structure arranged on the outer sides of the track plate on both sides, the noise reduction structure includes a honeycomb cavity formed by a plurality of chambers arranged closely, the honeycomb cavity is filled with absorbing material, and the absorbing material is one or two of sand, slag, clay and foam.

[0015] Beneficial effects: The vibration isolation system for tunnel tracks of the present invention supports the track plate of the track system through vibration isolation, thereby isolating or reducing the transmission of vibration caused by the impact of the wheel and the track to the tunnel foundation, thereby reducing noise. Among them, due to the provision of a first vibration reduction mechanism for torsional vibration reduction and a second vibration reduction mechanism for both floating vibration reduction and annular spring vibration reduction, higher vibration isolation requirements can be effectively met.

[0016] The vibration isolation system for the track in a tunnel of the present invention is disclosed in detail below with reference to the embodiments shown in the accompanying drawings and the accompanying reference numerals. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The schematic diagram of the structure of the vibration isolation system for the track in the tunnel of the present invention is shown;

[0018] Figure 2 A schematic diagram of the internal structure of the vibration isolation support device (without the housing) in the present invention is shown;

[0019] Figure 3 A schematic cross-sectional structure diagram of a vibration isolation support device (with a housing) in the present invention is shown;

[0020] Figure 4 A partial cross-sectional structural schematic diagram of the torsional vibration damper in the present invention is shown.

[0021] Reference numerals

[0022] 1 Tunnel foundation

[0023] 2 Base

[0024] 3 Track plate

[0025] 4 Vibration isolation support device

[0026] 5 Honeycomb cavity

[0027] 6. Absorbing materials

[0028] 7. First vibration damping mechanism

[0029] 8 Second vibration reduction mechanism

[0030] 9 Third vibration reduction mechanism

[0031] 10 Pressure plate

[0032] 11 Vertical rod

[0033] 12 Conversion set

[0034] 13 Torsional vibration damper

[0035] 14 Rotating disk

[0036] 15 Vertical slot

[0037] 16 Housing

[0038] 17 Rotor

[0039] 18 Chamber

[0040] 19 Flow holes

[0041] 20 Lower annular spring body

[0042] 21 Middle ring spring body

[0043] 22 Upper annular spring body

[0044] 23 Floating spring assembly

[0045] 24 First outer cone portion

[0046] 25 First inner cone part

[0047] 26 Second inner cone part

[0048] 27 Second outer cone portion

[0049] 28 Second support spring body

[0050] 29 Second support plate

[0051] 30 tracks

[0052] 31 Shell

[0053] 32 Radial protrusion

[0054] 33 First support spring body

[0055] 34 Support rod

[0056] 35 First support plate DETAILED DESCRIPTION

[0057] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0059] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0060] In the present invention, Figure 1 The schematic diagram of the structure of the vibration isolation system for the track in the tunnel of the present invention is shown; Figure 2 A schematic diagram of the internal structure of the vibration isolation support device (without the housing) in the present invention is shown; Figure 3 A schematic cross-sectional structure diagram of a vibration isolation support device (with a housing) in the present invention is shown; Figure 4 A partial cross-sectional structural schematic diagram of the torsional vibration damper in the present invention is shown.

[0061] Reference Figure 1As shown, the present invention discloses a vibration isolation system for tracks in tunnels, which is installed on a tunnel foundation 1 of a shield tunnel, and includes a base 2 installed on the tunnel foundation 1 and a vibration isolation support device 4 arranged on the base 2 and supporting a track plate 3 of a track system. The track system includes a track plate 3 and a track 30 installed on the track plate 3. Multiple vibration isolation support devices 4 are arranged along the travel direction of the track, and preferably, they are respectively arranged on both sides of the lateral travel direction of the track.

[0062] In addition, refer to Figure 1 As shown, on the track foundation, a noise reduction structure for further sound absorption and noise reduction is arranged on both lateral sides of the track plate 3. Specifically, the noise reduction structure includes a honeycomb cavity 5 formed by a plurality of closely arranged chambers, and the honeycomb cavity 5 is filled with an absorbing material 6. The absorbing material 6 is one or two of sand, slag, clay and foam. It can effectively absorb the noise generated by vibration and transmitted to the outside, thereby further reducing the noise.

[0063] Figure 2 and Figure 3 The specific structure of the vibration isolation support device 4 of the present invention is clearly shown. Figure 2 and Figure 3 As shown, the vibration isolation support device 4 includes a housing 31, a first vibration reduction mechanism 7, a second vibration reduction mechanism 8 and a third vibration reduction mechanism 9. The so-called "first", "second" and "third" are only names for distinguishing the vibration reduction mechanisms, and do not mean that there is only one type of vibration reduction method in each vibration reduction mechanism. On the contrary, at least one of the first vibration reduction mechanism 7, the second vibration reduction mechanism 8 and the third vibration reduction mechanism 9 has at least two vibration reduction methods.

[0064] In a preferred embodiment, the first damping mechanism 7 includes a pressing plate 10 and a vertical rod 11 connected to the pressing plate 10, the vertical rod 11 can move in the vertical direction when the pressing plate 10 is subjected to a vertical load, and the first damping mechanism 7 also includes a conversion sleeve 12 and a torsional vibration damper 13, the conversion sleeve 12 is disposed on the vertical rod 11, the conversion sleeve 12 can receive the vertical movement of the vertical rod 11 and can convert the vertical movement of the vertical rod 11 into the rotational movement of the rotating disk of the torsional vibration damper 13. That is, in the first damping mechanism 7, the conversion sleeve 12 can convert the vertical downward linear motion of the vertical rod 11 into the rotational motion of the rotating disk of the torsional vibration damper 13, so that the rotating disk 14 of the torsional vibration damper 13 rotates, thereby generating torsional vibration damping. Among them, the pressing plate 10 is fixedly connected to the track plate 3 of the track system, and the vertical rod 11 is attached to the bottom side of the pressing plate 10 and moves with the pressing plate 10 when the pressing plate 10 is subjected to a vertical load.

[0065] It is understood by those skilled in the art that the conversion sleeve 12 can convert the linear motion into the rotational motion by a mechanical structure of the prior art. In the present invention, preferably, the conversion sleeve 12 includes a vertical groove 15 and an arc groove (not shown in the figure) connected to the vertical groove 15, and a radial protrusion 32 is provided on the vertical rod 11, and the radial protrusion 32 is located in the vertical groove 15. When subjected to a vertical load, the vertical rod 11 can move downward along the vertical groove 15 to enter the arc groove, and after entering the arc groove, it moves along the arc groove to force the conversion sleeve 12 to rotate around its own axis. The so-called vertical groove 15 refers to a groove arranged on the side wall of the conversion sleeve 12, which is open upward and vertically downward, and can receive the radial protrusion 32 on the vertical rod 11, and form a straight line guide for the radial protrusion 32 in the vertical direction. The so-called arc groove refers to a groove arranged on the side wall of the conversion sleeve 12, which is connected to the lower port of the vertical groove 15 and is in an arc form (even a spiral form) along the vertical direction. When the radial protrusion 32 moves downward beyond the lower port of the vertical groove 15, it will enter the arc groove, thereby moving along the arc shape of the arc groove, so that the conversion sleeve 12 is forced to produce rotational motion, thereby driving the rotating disk 14 of the torsional vibration damper 13 to rotate.

[0066] The present invention Figure 4 FIG. 1 shows a partial cross-sectional view of the torsional vibration damper 13. Figure 4 As shown, and refer to Figure 3 As shown, the torsional vibration damper 13 includes a housing 16 and a rotating disk 14. A cavity is formed in the housing 16. The rotating disk 14 is provided with a rotor body 17 inserted into the cavity in the housing 16. The housing 16 and the main body of the rotating disk 14 are sealed and connected. The rotating disk 14 can drive the rotor body 17 to rotate in the housing 16. The rotor body 17 divides the cavity in the housing 16 into at least two independent and communicable chambers 18. Each chamber 18 is injected with a fluid medium. The rotor body 17 is provided with a flow hole 19 that communicates two adjacent chambers 18. When the rotating disk 14 rotates driven by the conversion disk, the rotor body 17 will compress the fluid medium in the housing 16 to flow from one chamber 18 to another adjacent chamber 18. Since the aperture of the flow hole 19 is usually small, a buffer damping effect will be formed in this extrusion flow process.

[0067] Now turn back to Figure 2 and Figure 3 . Reference Figure 2 and Figure 3As shown, the second vibration damping mechanism 8 includes a lower annular spring body 20, a middle annular spring body 21 and an upper annular spring body 22. The lower annular spring body 20 is against the outer shell of the torsional vibration damper 13 in the vertical direction. The middle annular spring body 21 is floated and supported on the lower annular spring body 20 through at least two groups of floating spring assemblies 23. The upper annular spring body 22 is attached to the pressure plate 10 and can be contacted and squeezed with the middle annular spring body 21 to generate elastic deformation when the pressure plate 10 is subjected to a vertical load. The vertical rod 11 passes through the second vibration damping mechanism 8 from top to bottom and is connected and matched with the conversion sleeve 12.

[0068] The so-called annular spring body refers to a body that forms an extrusion elastic deformation through the contact of the conical surface part, thereby bearing the vertical load. In the second damping mechanism 8, the upper annular spring body 22 includes a first outer conical surface part 24, and the upper part of the middle annular spring body 21 is provided with a first inner conical surface part 25. When the pressure plate 10 is subjected to a vertical load, the first outer conical surface part 24 of the upper annular spring body 22 can contact with the first inner conical surface part 25 of the middle annular spring body 21 and squeeze each other to form elastic deformation; the lower part of the middle annular spring body 21 is provided with a second inner conical surface part 26. When the floating spring assembly 23 is compressed under the vertical load, the second inner conical surface part 26 of the middle annular spring body 21 can contact with the second outer conical surface part 27 of the lower annular spring body 20 and squeeze each other to form elastic deformation. When subjected to a vertical load, the outer conical surface portion of the upper annular spring body 22 can be squeezed into the corresponding inner conical surface portion of the middle annular spring body 21; when the floating spring assembly 23 is compressed to a certain extent (usually when the middle annular spring body 21 overcomes the elasticity of the floating spring assembly 23 and is pressed downward to contact the lower annular spring body 20), the outer conical surface portion of the lower annular spring body 20 can also be squeezed into the corresponding inner conical surface portion of the middle annular spring body 21, thereby forming elastic extrusion deformation. In the present invention, the upper annular spring body 22, the middle annular spring body 21 and the lower annular spring body 20 are all made of rubber material and / or memory alloy material.

[0069] There are two types of vibration reduction in the second vibration reduction mechanism 8, one is the vibration reduction mode through the mutual cooperation of the conical surface parts of the annular spring body, and the other is the mode of floating vibration isolation. Specifically, the floating spring assembly 23 includes a first supporting spring body 33, a supporting rod 34 arranged through the first supporting spring body 33, and a first supporting plate 35 fixed on the supporting rod 34 by a sleeve, one end of the supporting rod 34 is fixed on the lower annular spring body 20, and the other end is inserted into the bottom slot of the middle annular spring body 21, the bottom support of the first supporting spring body 33 is arranged on the lower annular spring body 20, the first supporting plate 35 is against the top of the first supporting spring body 33, and the first supporting plate 35 and the bottom of the middle annular spring body 21 are arranged in a manner of reserving a first stroke gap in the vertical direction. The bottom of the lower annular spring body 20 and the bottom of the middle annular spring body 21 are arranged in a manner of reserving a second stroke gap in the vertical direction, and the second stroke gap is larger than the first stroke gap. When a vertical load occurs, vibration reduction / vibration isolation is first achieved by compressing the first support spring of the floating spring assembly 23 between the middle annular spring and the lower annular spring until the first stroke gap between the first support plate 35 and the middle annular spring body 21 disappears (i.e., the first support plate 35 is in contact with the middle annular spring body 21). Vibration isolation and vibration reduction are achieved between the middle annular spring and the lower annular spring only by means of the floating spring until the second stroke gap disappears. Vibration reduction / vibration isolation can then be achieved between the lower annular spring body 20 and the middle annular spring body 21 by means of the mutual cooperation and extrusion of the corresponding conical parts. At this time, the vibration isolation method of the mutual cooperation of the conical parts of the annular spring bodies and the vibration isolation method of the floating spring work together.

[0070] In addition, refer to Figure 2 and Figure 3 As shown, the vibration isolation system also includes a third vibration reduction mechanism 9, which includes a second support spring body 28 and a second support plate 29. The second support plate 29 is fixedly mounted on the vertical rod 11, and the second support spring body 28 is mounted on the vertical rod 11, and the upper end of the second support spring body 28 abuts against the second support plate 29, and the lower end abuts against the outer shell of the torsional vibration damper 13. When subjected to a vertical load, the third vibration reduction mechanism 9 takes effect before the first vibration reduction mechanism 7, until the second support spring body 28 of the third vibration reduction mechanism 9 is compressed to a certain extent, the radial protrusion 32 of the vertical rod 11 will be drawn into the arc groove of the conversion sleeve 12, thereby driving the conversion sleeve 12 to generate a rotational motion that can drive the rotating disk 14 of the torsional vibration damper 13. In this way, the vibration isolation system of the present invention has multi-stage vibration reduction to meet the different requirements of track vibration generation.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A vibration isolation system for a track in a tunnel, characterized in that: include: a pedestal, which is installed on the tunnel foundation; A vibration isolation support device is arranged on the base and supports the track plate of the track system; The vibration isolation support device comprises: A first vibration damping mechanism, comprising a pressing plate and a vertical rod connected to the pressing plate, wherein the vertical rod can move in a vertical direction when the pressing plate is subjected to a vertical load, and further comprising a conversion sleeve and a torsional vibration damper, wherein the conversion sleeve is disposed on the vertical rod, and the conversion sleeve can receive vertical movement of the vertical rod and can convert the vertical movement of the vertical rod into rotational movement of a rotating disk of the torsional vibration damper; A second vibration damping mechanism, the second vibration damping mechanism comprises a lower annular spring body, a middle annular spring body and an upper annular spring body, the lower annular spring body abuts against the housing of the torsional vibration damper in the vertical direction, the middle annular spring body is float-supported on the lower annular spring body through at least two groups of floating spring assemblies, the upper annular spring body is attached to the pressure plate and can be contacted and squeezed with the middle annular spring body to generate elastic deformation when the pressure plate is subjected to a vertical load, and the vertical rod passes through the second vibration damping mechanism from top to bottom and is connected and matched with the conversion sleeve; The conversion sleeve includes a vertical groove and an arc groove connected to the vertical groove. A radial protrusion is arranged on the vertical rod, and the radial protrusion is located in the vertical groove. When subjected to a vertical load, the vertical rod can move downward along the vertical groove to enter the arc groove, and after entering the arc groove, it moves along the arc groove to force the conversion sleeve to rotate around its own axis.

2. The vibration isolation system for tunnel track according to claim 1, characterized in that: The upper annular spring body comprises a first outer conical surface portion, and the upper portion of the middle annular spring body is provided with a first inner conical surface portion, and when the pressure plate is subjected to a vertical load, the first outer conical surface portion of the upper annular spring body can contact with the first inner conical surface portion of the middle annular spring body and squeeze each other to form elastic deformation; and / or, The lower annular spring body includes a second outer conical portion, and the lower portion of the middle annular spring body is provided with a second inner conical portion. When the floating spring assembly is compressed under a vertical load, the second inner conical portion of the middle annular spring body can contact the second outer conical portion of the lower annular spring body and squeeze each other to form elastic deformation.

3. The vibration isolation system for tunnel track according to claim 1, characterized in that: The floating spring assembly includes a first supporting spring body, a supporting rod passing through the first supporting spring body, and a first supporting plate fixed to the supporting rod by a sleeve, wherein one end of the supporting rod is fixed to the lower annular spring body, and the other end is inserted into the bottom slot of the middle annular spring body, the bottom support of the first supporting spring body is arranged on the lower annular spring body, the first supporting plate is against the top of the first supporting spring body, and the first supporting plate and the bottom of the middle annular spring body are arranged in a manner of reserving a first travel gap in the vertical direction.

4. The vibration isolation system for tunnel track according to claim 3, characterized in that: A second travel gap is vertically reserved between the bottom of the lower annular spring body and the bottom of the middle annular spring body, and the second travel gap is larger than the first travel gap.

5. The vibration isolation system for tunnel track according to claim 1, characterized in that: The upper annular spring body and the pressing plate are a one-piece structure.

6. The vibration isolation system for tunnel track according to claim 1, characterized in that: The conversion sleeve and the rotating disk of the torsional vibration damper are a one-piece structure.

7. The vibration isolation system for tunnel track according to claim 1, characterized in that: The conversion sleeve is at least partially located inside the lower annular spring body.

8. The vibration isolation system for tunnel track according to any one of claims 1 to 7, characterized in that: The vibration isolation system also includes a third vibration damping mechanism, which includes a second support spring body and a second support plate. The second support plate sleeve is fixedly arranged on the vertical rod, the second support spring body sleeve is arranged on the vertical rod, and the upper end of the second support spring body abuts against the second support plate, and the lower end abuts against the outer shell of the torsional vibration damper.

9. The vibration isolation system for tunnel track according to claim 8, characterized in that: It also includes a noise reduction structure arranged on the outer sides of the two lateral sides of the track plate, the noise reduction structure includes a honeycomb cavity formed by a plurality of chambers arranged closely together, the honeycomb cavity is filled with absorbing material, and the absorbing material is one or two of sand, slag, clay and foam.

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