Vibration isolation railway track with amplification energy consumption mechanism

Abstract

The invention relates to the technical field of underground track vibration isolation and reduction, in particular to a vibration isolation railway track with an amplification energy consumption mechanism, which comprises a track, a floating slab track bed and a bottom backfill layer, an energy dissipation supporting device is fixedly arranged on the backfill layer; the energy dissipation supporting device comprises a sleeve, two annular gaskets, a shaft rod and three layers of annular springs. A hinged type amplification structure is arranged on the side face of the energy dissipation supporting device. The hinged amplification structure is formed by rotationally connecting an upper connecting rod piece and a lower connecting rod piece; the three lug plate openings of the shaft rod, the upper connecting rod piece and the lower connecting rod piece are concentrically arranged and are mutually hinged through pin shafts; the upper connecting rod piece and the lower connecting rod piece are rotationally connected with the floating slab ballast bed and the backfill layer through the end connecting plates correspondingly, kinetic energy can be fully converted into heat energy to be dissipated, and the problem that the energy dissipation mechanism of a traditional vibration isolation support or an energy dissipation component cannot be exerted due to small-amplitude vibration is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of vibration isolation and reduction of underground tracks, in particular to a vibration isolation railway track with an amplified energy consumption mechanism. Background Art

[0002] With the development of my country's underground urban rail transit system, the subway has gradually become the mainstream mode of travel for residents. However, the vibration and noise problems caused by track operation seriously affect the safety of the above-ground structure and the comfort of residents' lives. The floating slab trackbed installs vibration isolation devices between the track and the main structure to reduce the spread of track operation vibration, which has become the current mainstream vibration reduction measure.

[0003] Currently, existing floating slab track beds mostly use steel springs as vibration isolation and damping devices. This type of shock absorber only isolates vibration but has no energy dissipation capacity, resulting in the inability to dissipate kinetic energy. At the same time, the amplitude of track operation is generally small, and the effect of the vibration isolation and damping device cannot be fully utilized.

[0004] In summary, according to the shortcomings of existing vibration isolation and reduction measures for floating slab ballast, there is a need for a floating slab ballast vibration isolation and reduction system that can effectively amplify the vibration isolation effect and energy dissipation capacity of the vibration isolation and reduction device and improve the kinetic energy absorption rate. Summary of the invention

[0005] The purpose of the present application is to provide a vibration-isolating railway track with an amplified energy dissipation mechanism, aiming to solve the problems in the prior art.

[0006] The embodiment of the present application provides a vibration isolation railway track with an amplification energy dissipation mechanism, comprising a track, a floating plate ballast and a bottom backfill layer; an energy dissipation support device is fixedly arranged on the backfill layer; the energy dissipation support device comprises a sleeve, two annular gaskets, an axle rod and a three-layer annular spring; the axle rod is slidably arranged in the sleeve; a three-layer annular spring is arranged between the axle rod and the sleeve; an annular gasket is arranged at each end of the sleeve; the bottom edges of the end springs on both sides of the three-layer annular spring are respectively against the two annular gaskets; a hinged amplification structure is arranged on the side of the energy dissipation support device; the hinged amplification structure is composed of an upper connecting rod and a lower connecting rod rotatably connected; the ends of the upper connecting rod and the lower connecting rod are both provided with ear plates; one end of the axle rod of the energy dissipation support device is provided with an ear plate; the three ear plate openings of the axle rod, the upper connecting rod and the lower connecting rod are concentrically arranged and hinged to each other through a pin shaft; the upper connecting rod and the lower connecting rod are respectively rotatably connected to the floating plate ballast and the backfill layer through the end connecting plates.

[0007] Furthermore, the upper connecting rod, the lower connecting rod and the three ear plates at the hinged joint of the shaft rod are overlapped with each other; and rubber blocks are provided at the adjacent overlapping parts of the ear plates.

[0008] Furthermore, both ends of the sleeve are provided with openings that are not less than the diameter of the end of the shaft rod; and the shaft rod is in an I-shape.

[0009] Furthermore, the three-layer annular spring includes two end springs, a plurality of outer ring springs, a middle ring spring and an inner ring spring; the end springs have a trapezoidal cross-section, the middle ring spring has a hexagonal cross-section, the outer ring spring and the inner ring spring both have a pentagonal cross-section, and the conical surface of the middle ring spring fits with the inclination conical surfaces of the outer ring spring and the inner ring spring respectively.

[0010] Furthermore, the end connecting plate is fixedly arranged on the bottom of the floating plate ballast and the backfill layer; the end connecting plate includes a base, a hinged plate and a plurality of stiffening ribs, and the hinged plate is welded to the base at 45°; the stiffening ribs are located on the side of the hinged plate and are welded to the hinged plate and the base.

[0011] Furthermore, the base is composed of two mutually orthogonal welded fixing plates; the fixing plates are provided with fastening screw holes; and the hinged plates are provided with pin shaft through holes.

[0012] Furthermore, the pin through-hole is respectively arranged concentrically with the end ear plate opening of the upper connecting rod or the lower connecting rod and is hinged through the pin.

[0013] The beneficial effects of the present invention are as follows: the present invention uses an articulated amplification structure and a displacement-sensitive energy-absorbing support device in series to convert the vertical displacement of the floating plate into the axial piston movement of the energy-absorbing support device, and amplify the displacement amplitude, thereby increasing the mutual friction distance between the conical surfaces of the three-layer annular spring. In this process, the kinetic energy is more fully converted into heat energy and dissipated, effectively solving the problem that small-amplitude vibrations cannot exert the energy-absorbing mechanism of traditional vibration isolation bearings or energy-absorbing components, and improving the kinetic energy absorption rate without excessive modification of the floating plate track bed structure. At the same time, when the vertical displacement of the floating plate exceeds a certain amplitude, the middle ring springs inside the energy-absorbing support device are dead-set and equivalent to a rigid body, providing greater rigidity to limit the continued sinking of the floating plate. Finally, when the track operation is over, the energy-absorbing support device can also provide an axial restoring force and help the floating plate return to its original position through the articulated amplification structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the articulated amplification structure;

[0016] Figure 3 is a structural schematic diagram of the end connecting plate;

[0017] Figure 4 It is a structural schematic diagram of the energy dissipation support device;

[0018] Figure 5 It is a schematic diagram of the structure of a three-layer annular spring;

[0019] Figure 6 It is a schematic diagram of the working of each structure of the device of the present invention when it is under pressure;

[0020] Figure 7 It is a schematic diagram of the working structure of the device under tension of the present invention.

[0021] In the figure:

[0022] 1. Energy-absorbing support device; 11. Outer ring spring; 12. Middle ring spring; 13. Inner ring spring; 14. End spring; 15. Sleeve; 16. Annular gasket; 17. Axle rod; 2. Articulated amplification structure; 21. Upper connecting rod; 22. Lower connecting rod; 23. End connecting plate; 231. Articulated plate; 232. Fixed plate; 233. Stiffening rib; 3. Backfill layer; 4. Floating slab ballast bed. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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.

[0024] like Figures 1 to 5 The vibration-isolating railway track with an amplified energy-dissipating mechanism shown in the figure comprises a track, a floating plate ballast 4 and a bottom backfill layer 3; an energy-dissipating support device 1 is arranged on the backfill layer 3; the energy-dissipating support device 1 comprises a sleeve 15, two annular gaskets 16, an axle rod 17 and a three-layer annular spring; the axle rod 17 is slidably arranged in the sleeve 15; a three-layer annular spring is arranged between the axle rod 17 and the sleeve 15; an annular gasket 16 is arranged at each end of the sleeve 15; the bottom edges of the end springs on both sides of the three-layer annular spring are respectively pressed against the two annular gaskets 16; the side of the energy-dissipating support device 1 is provided with an articulated amplifying structure Structure 2; the articulated amplification structure 2 is composed of an upper connecting rod 21 and a lower connecting rod 22 rotatably connected; the ends of the upper connecting rod 21 and the lower connecting rod 22 are both provided with ear plates; one end of the shaft 17 of the energy dissipation support device 1 is provided with an ear plate; the three ear plate openings of the shaft 17, the upper connecting rod 21 and the lower connecting rod 22 are concentrically arranged and hinged to each other through a pin; the upper connecting rod 21 and the lower connecting rod 22 are respectively rotatably connected to the floating plate ballast 4 and the backfill layer 3 through the end connecting plates 23, and corresponding grooves are provided on the floating plate ballast 4 and the backfill layer 3 for setting the articulated amplification structure 2.

[0025] The three ear plates at the hinged joints of the upper connecting rod 21, the lower connecting rod 22 and the shaft rod 17 are overlapped with each other; rubber blocks are provided at the adjacent overlapping parts of the ear plates to increase the friction energy dissipation capacity and increase the ability of the articulated amplification structure 2 to resist out-of-plane longitudinal displacement.

[0026] Both ends of the sleeve 15 are provided with openings not less than the diameter of the end of the shaft rod 17; the shaft rod 17 is in an I-shape.

[0027] The three-layer annular spring includes two end springs 14, a plurality of outer ring springs 11, a middle ring spring 12 and an inner ring spring 13; the end spring 14 has a trapezoidal cross-section, the middle ring spring 12 has a hexagonal cross-section, the outer ring spring 11 and the inner ring spring 13 both have pentagonal cross-sections, and the conical surface of the middle ring spring 12 fits with the inclination conical surfaces of the outer ring spring 11 and the inner ring spring 13 respectively.

[0028] The end connecting plate 23 is fixedly arranged on the bottom of the floating plate ballast 4 and the backfill layer 3; the end connecting plate 23 includes a base, a hinged plate 231 and a plurality of stiffening ribs 233, and the hinged plate 231 is welded to the base at 45 degrees; the stiffening ribs 233 are located on the side of the hinged plate 231 and are welded to the hinged plate 231 and the base.

[0029] The base is composed of two mutually orthogonally welded fixing plates 232; the fixing plates 232 are provided with fastening screw holes, and fastening screws can be set in the fastening screw holes to fix the base on the ballast or backfill layer; the hinged plate 231 is provided with a pin shaft through hole.

[0030] The pin through-holes are respectively arranged concentrically with the end ear plate openings of the upper connecting rod 21 or the lower connecting rod 22 and are hingedly arranged through the pins.

[0031] like Figure 6 and Figure 7 As shown, when the floating plate ballast 4 moves vertically downward, the upper and lower end connecting plates 23 begin to approach, the angle between the upper connecting rod 21 and the lower connecting rod 22 decreases, and the hinge node moves axially, driving the shaft rod 17 to squeeze the inner annular gasket 16, so that the inner annular gasket 16 squeezes the inner end spring 14, and the end spring 14 and the middle ring spring 12 squeeze the outer ring spring 11 and the inner ring spring 13 on both sides through the cones on both sides, so that the outer ring spring 11 and the inner ring spring 13 are radially deformed inward and outward respectively, until the bottom surfaces of the middle ring springs 12 are pressed against each other, and the energy dissipation support device 1 loses its deformation ability and is equivalent to a rigid body.

[0032] When the floating plate ballast 4 moves vertically upward, the upper and lower end connecting plates 23 begin to move away from each other, the angle between the upper connecting rod 21 and the lower connecting rod 22 increases, and the hinge node moves axially, driving the shaft rod 17 to squeeze the outer annular gasket 16, so that the outer end spring 14 is squeezed by the outer annular gasket 16, and the end spring 14 and the middle ring spring 12 squeeze the outer ring spring 11 and the inner ring spring 13 on both sides through the cones on both sides, so that the outer ring spring 11 and the inner ring spring 13 are radially deformed inward and outward respectively, until the bottom surfaces of the middle ring springs 12 are pressed against each other, and the energy dissipation support device 1 loses its deformation ability, which is equivalent to a rigid body.

[0033] When the vertical displacement of the floating slab ballast 4 ends, the elastic deformation of the outer ring spring 11 and the inner ring spring 13 begins to recover, and the middle ring spring 12 and the end spring 14 are squeezed through the cone surface, so that the gap between each middle ring spring 12 and the end spring 14 is increased, and the shaft rod 17, the articulated amplification structure 2 and the floating slab ballast 4 are driven to the original position, thereby realizing the self-resetting function.

[0034] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A vibration-isolating railway track with an amplified energy dissipation mechanism, characterized in that: The invention comprises a track, a floating plate ballast and a bottom backfill layer; an energy-absorbing support device is fixedly arranged on the backfill layer; the energy-absorbing support device comprises a sleeve, two annular gaskets, an axle rod and a three-layer annular spring; the axle rod is slidably arranged in the sleeve; a three-layer annular spring is arranged between the axle rod and the sleeve; an annular gasket is arranged at each end of the sleeve; the bottom edges of the end springs on both sides of the three-layer annular spring are respectively against the two annular gaskets; an articulated amplification structure is arranged on the side of the energy-absorbing support device; the articulated amplification structure is composed of an upper connecting rod and a lower connecting rod rotatably connected; the ends of the upper connecting rod and the lower connecting rod are both provided with ear plates; one end of the axle rod of the energy-absorbing support device is provided with an ear plate; the three ear plate openings of the axle rod, the upper connecting rod and the lower connecting rod are concentrically arranged and hinged to each other through a pin shaft; the upper connecting rod and the lower connecting rod are respectively rotatably connected to the floating plate ballast and the backfill layer through the end connecting plates.

2. The vibration-isolating railway track with an amplified energy dissipation mechanism according to claim 1, characterized in that: The upper connecting rod, the lower connecting rod and the three ear plates at the hinged joint of the shaft rod are overlapped with each other; and rubber blocks are arranged at the adjacent overlapping parts of the ear plates.

3. The vibration-isolating railway track with an amplified energy dissipation mechanism according to claim 1, characterized in that: Both ends of the sleeve are provided with openings which are not less than the diameter of the end of the shaft rod; and the shaft rod is in an I-shape.

4. The vibration-isolating railway track with an amplified energy dissipation mechanism according to claim 1, characterized in that: The three-layer annular spring includes two end springs, a plurality of outer ring springs, a middle ring spring and an inner ring spring; the end springs have a trapezoidal cross-section, the middle ring spring has a hexagonal cross-section, the outer ring spring and the inner ring spring both have pentagonal cross-sections, and the conical surface of the middle ring spring fits with the inclination conical surfaces of the outer ring spring and the inner ring spring respectively.

5. The vibration-isolating railway track with an amplified energy dissipation mechanism according to claim 1, characterized in that: The end connecting plate is fixedly arranged on the bottom of the floating plate ballast and the backfill layer; the end connecting plate includes a base, a hinged plate and a plurality of stiffening ribs, and the hinged plate is welded to the base at 45 degrees; the stiffening ribs are located on the side of the hinged plate and are welded to the hinged plate and the base.

6. The vibration-isolating railway track with an amplified energy dissipation mechanism according to claim 5, characterized in that: The base is composed of two mutually orthogonally welded fixing plates; the fixing plates are provided with fastening screw holes; and the hinged plates are provided with pin shaft through holes.

7. The vibration-isolating railway track with an amplified energy dissipation mechanism according to claim 6, characterized in that: The pin shaft through-hole is respectively arranged concentrically with the end ear plate opening of the upper connecting rod or the lower connecting rod and is hinged through the pin shaft.

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