A polymer composite floating slab track bed vibration isolator capable of achieving multi-directional vibration isolation

Abstract

The present invention provides a polymer composite floating plate track bed vibration isolator capable of achieving multi-directional vibration isolation effect, comprising a connecting device, a pressure bearing device and a vibration isolation device, wherein the connecting device comprises a foundation sleeve, a ball stud, a hanging bolt and a bottom plate connecting bolt, wherein the foundation sleeve is pre-buried in the floating plate and connected to the ball stud by threaded cooperation, the end of the ball stud is hemispherical, the pressure bearing device comprises an upper cover plate, a pressure bearing plate and a bottom plate, wherein the pressure bearing plate and the bottom plate are connected to the vibration isolation device, a rubber coating is arranged inside the upper cover plate, the upper surface is connected to the floating plate, and power is transmitted to the pressure bearing plate through the ball stud, a spherical groove is provided in the middle of the pressure bearing plate, which cooperates with the spherical surface of the ball stud, the vibration isolation device comprises a retaining frame and an elastic matrix, the middle part of the retaining frame is opened, and the elastic matrix penetrates into the hole of the retaining frame. The present invention develops a polymer composite floating slab roadbed vibration isolator which can achieve multi-directional vibration isolation effect, which not only has obvious vibration isolation effect on the vertical load generated during train operation, but also has good vibration isolation effect on the lateral and longitudinal loads generated during train operation.

Description

Technical Field

[0001] The invention relates to a vibration isolator technology, in particular to a new type of vibration isolator for a floating plate track bed. Background Art

[0002] Vibration isolation technology isolates the vibration source from the protected object through an auxiliary system that includes special devices, thereby reducing the dynamic coupling between the vibration source and the isolated object and reducing the transmission of adverse vibrations to the protected object or from the object.

[0003] Vibration isolation technology was previously widely used in aviation, marine, machinery, civil engineering, energy and other industries. Since it was introduced into the rail transportation industry, people have changed the design ideas of the track, got rid of the traditional vibration reduction mode that simply relied on sleepers and gravel, and adopted ballastless floating slab roadbed vibration isolation technology to obtain satisfactory vibration isolation effects, opening up a new world for the rail transportation industry. At present, vibration isolators are widely used in various ballastless track equipment, including floating slab roadbed equipment.

[0004] A vibration isolator is a mechanical device that uses the energy absorption principle of the elastic material of the vibration isolator to convert the kinetic energy of a vibrating object into the internal energy of the elastic material. Vibration isolators have a wide range of applications and are widely used in high-speed presses, automobiles, aerospace equipment platforms and other places. Current vibration isolators are also widely used in the field of rail transportation, such as Beijing Metro Line 4. However, in the current prior art, such as the CN2018100725930 patent, because the steel spring structure used between the vibration isolator and the floating plate track has poor longitudinal and lateral vibration isolation effects, it is necessary to design a new structure to achieve the multi-directional vibration isolation effect of the floating plate trackbed vibration isolation system.

[0005] In view of the above problems, the present invention is improved on the basis of the previous invention and provides a vibration isolator with a new structure to achieve multi-directional vibration isolation of the floating slab track bed vibration isolation system. Summary of the invention

[0006] In view of the above problems, the present invention is an improvement on the previous invention and provides a new vibration isolator.

[0007] In order to achieve the above object, the technical solution of the present invention is as follows:

[0008] A floating plate track bed vibration isolator capable of realizing multi-directional vibration isolation, comprising a connecting device, a pressure-bearing device and a vibration isolation device, wherein the connecting device comprises a foundation sleeve, a ball stud, a hanging bolt and a base plate connecting bolt, wherein the foundation sleeve is pre-buried in the floating plate and connected to the ball stud by threaded cooperation, the end of the ball stud is hemispherical, the pressure-bearing device comprises an upper cover plate, a pressure-bearing plate and a base plate, wherein the pressure-bearing plate and the base plate are connected to the vibration isolation device, a rubber coating is arranged inside the upper cover plate, the upper surface is connected to the floating plate, and power is transmitted to the pressure plate through the ball stud, a spherical groove is provided in the middle of the pressure plate, which cooperates with the spherical surface of the ball stud, the vibration isolation device comprises a retaining frame and an elastic matrix, the middle part of the retaining frame is opened, and the elastic matrix penetrates into the hole of the retaining frame.

[0009] Preferably, the elastic matrix has a harder hardness than the retaining frame.

[0010] Preferably, the vibration isolation device is externally covered with a protective plate.

[0011] Preferably, the thickness of the rubber coating of the upper cover plate allows for a transition fit between the upper cover plate and the pressure plate.

[0012] Preferably, the hardness of the rubber coating of the upper cover plate is lower than the hardness of the rubber retainer.

[0013] Preferably, the pressure plate is made of vibration-absorbing and wear-resistant material.

[0014] Preferably, a vulcanization process is used between the vibration isolation device and the pressure plate to ensure the connection strength.

[0015] Preferably, a vulcanization process is used between the vibration isolation device and the base plate to ensure the connection strength.

[0016] Preferably, the vulcanized cord layer or the like in the elastic matrix increases the shear resistance of the elastic matrix.

[0017] Preferably, the retainer is made of high-quality rubber that is resistant to high temperatures, oil, fatigue, and UV rays.

[0018] Preferably, the ball head portion of the ball stud and the groove portion of the pressure plate are subjected to wear-resistant treatment.

[0019] Preferably, the inclination angle of the upper cover plate relative to the pressure plate and the vibration isolation device is controlled within ±3°.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1) The present invention has developed a new polymer composite floating slab track bed vibration isolator that can achieve multi-directional vibration isolation. The advantages of the vibration isolator are that it can achieve multi-directional vibration isolation of the vibration isolation system, and can achieve automatic centering and rapid replacement of the vibration isolation system, which can achieve good vibration isolation effect. The present invention applies it to the field of floating slab track bed, and the effect is obvious.

[0022] 2) The present invention improves the structure of the vibration isolation device and adopts a polymer composite vibration isolation system. The material of the outer retaining frame is resistant to corrosion, high temperature, UV and aging, and the hardness of the retaining frame is relatively low, so that the system has better elasticity. The internal elastic matrix has a higher hardness and strong compression and shear resistance, which plays a major role in vibration isolation. The multi-column evenly distributed structure can overcome the defect of uneven force on the vibration isolation device.

[0023] 3) The present invention uses a spherical connection between the ball stud and the spherical groove of the pressure plate to enable the upper and lower parts of the vibration isolation system to be disengaged under the action of an external lifting device, thereby facilitating replacement of the vibration isolator.

[0024] 4) The present invention adds a rubber coating to the edge of the upper cover plate, which can ensure the automatic centering and alignment function of the vibration isolation system within a certain range, and at the same time, it can isolate the lateral and longitudinal dynamic loads. When the lateral and longitudinal loads are large, it can also play an overload protection role.

[0025] 5) The present invention can conveniently adjust the heights of the vibration isolation systems through the threaded connection between the upper cover plate and the ball bolts, thereby overcoming the height errors caused by construction errors or uneven forces in various parts of the floating slab track bed, and facilitating on-site construction and testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic diagram of the structure of a polymer composite floating slab ballast isolator capable of realizing multi-directional vibration isolation.

[0027] Figure 2 It is a schematic diagram of an embodiment of a polymer composite floating slab track bed vibration isolator capable of realizing multi-directional vibration isolation according to the present invention.

[0028] Figure 3 The present invention is a schematic diagram of the upper cover structure of a polymer composite floating slab ballast isolator capable of realizing multi-directional vibration isolation.

[0029] Figure 4 The present invention is a schematic diagram of the vibration isolator structure of a polymer composite floating slab track bed vibration isolator capable of realizing multi-directional vibration isolation.

[0030] Figure 5 The present invention is a schematic diagram of the bottom plate structure of a polymer composite floating slab ballast isolator capable of realizing multi-directional vibration isolation.

[0031] In the figure: 1-anchor sleeve, 2-ball bolt, 3-upper cover plate, 4-rubber coating, 5-lifting bolt, 6-hexagonal nut, 7-washer, 8-stud, 9-cage, 10-elastic matrix, 11-bottom plate, 12-pressure plate, 13-lifting ring, 14-ground, 15-floating plate ballast, 31-enclosure, 32-top plate, 33-longitudinal reinforcement rib, 34-center reinforcement ring, 35-transverse reinforcement rib, 91-cage outer coating, 92-cage matrix, 93-cage aperture, 111-vulcanized plate, 112-guide plate, 113-positioning hole. DETAILED DESCRIPTION

[0032] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0033] like Figure 1 As shown, a polymer composite floating slab track bed isolator capable of realizing multi-directional vibration isolation comprises a pressure plate 12, a retaining frame 9, an elastic matrix 10 and a bottom plate 11, wherein the retaining frame 9 and the elastic matrix 10 are both polymer composite materials, the retaining frame 9 has openings in the middle and around, the diameter of the openings is slightly larger than the outer diameter of the elastic matrix, the elastic matrix penetrates into the holes of the retaining frame 9, the elastic matrix 10 is connected to the openings of the retaining frame 9 by an adhesive, the retaining frame 9 and the elastic matrix 10 are both fixed to the pressure plate 12 by vulcanization or other bonding methods, the height of the elastic matrix 10 is slightly smaller than the height of the retaining frame hole, and the joints of the elastic matrix 10 and the retaining frame 9 openings and the pressure plate are kept flush.

[0034] The vibration isolator holder 9 and the elastic matrix 10 of the present invention are both made of high-strength elastic materials, preferably high-performance rubber materials and high-performance polyurethane materials or other polymer materials. When the designed vibration isolator is subjected to the static load of the floating plate ballast, the load acts on the vibration isolator holder 9 and the elastic matrix 10 through the anchor sleeve 1, the ball stud 2, and the pressure plate 12. The holder 9 is first compressed and deformed. When the bottom of the holder 9 is flush with the bottom of the elastic matrix 10, the holder 9 and the elastic matrix 10 jointly bear the load, and with the compression deformation of the holder 9 and the elastic matrix 10, the stiffness of the vibration isolator is further improved; when the gravity of the floating plate ballast and the supporting force of the holder 9 and the elastic matrix 10 reach a balance, the vibration isolator stops. Movement; when a train passes on the floating plate track bed, the dynamic load generated by the train operation causes the retaining frame 9 and the elastic matrix 10 to continue to be compressed and deformed until the support force generated by the vibration isolator is balanced with the gravity of the floating plate track bed and the dynamic load of the train, and the vibration isolator stops moving. When the train passes through the floating plate track bed, the support force generated by the vibration isolator is greater than the gravity of the floating plate track bed, and the retaining frame 9 and the elastic matrix 10 of the vibration isolator move upward, and the support force generated by the vibration isolator gradually decreases until the support force of the vibration isolator is balanced with the gravity of the floating plate track bed, and the retaining frame 9 and the elastic matrix 10 of the vibration isolator stop moving; when the next train passes, the retaining frame 9 and the elastic matrix 10 of the vibration isolator begin to be compressed and deformed, and a new round of vibration isolation stroke begins. When the elastic matrix 10 is compressed and deformed, the elastic matrix 10 will become thicker under the action of pressure, and the compressed elastic matrix 10 fills the open hole gap of the retaining frame 9 to ensure the stability of the vibration isolator.

[0035] Figure 2 The embodiment of the polymer composite floating slab ballast isolator which can realize multi-directional vibration isolation is demonstrated. Figure 2As shown, the ground 14 needs to be hardened and a stud bolt 8 is embedded. The lower end of the stud bolt 8 is located in the ground 14, and the upper end is connected to the hexagonal nut 6 through the base plate 11 and the washer 7. The floating plate ballast 15 is threadedly connected to the ball stud 2 through the embedded anchor sleeve 1, and the ball stud 2 is spherically connected to the groove part of the pressure plate 12. When there is a verticality error between the floating plate ballast 15 and the ground 14 due to installation error or construction error, it can ensure that the load of the ball stud 2 is always perpendicular to the pressure plate, realizing the automatic centering of the vibration isolation device. The inner diameter of the upper cover plate 3 is slightly larger than the outer diameter of the pressure plate 12, and the inner side of the upper cover plate 3 is coated with a rubber coating 4. After the vibration isolation system is installed, the bottom of the upper cover plate 3 is slightly higher than the top of the pressure plate, and threaded holes are provided at the corresponding positions of the bottom of the upper cover plate 3, the rubber coating 4, and the pressure plate 12 to connect with the lifting bolts 5 and the lifting ring 13, so as to play a lifting role during the transportation of the vibration isolation device; the lifting bolts 5 and the lifting ring 13 are connected with the upper cover plate 3, the rubber coating 4 and the pressure plate 12 during the transportation of the vibration isolation device to facilitate lifting. When the vibration isolation system is installed and in operation, it is taken out and properly stored to It is convenient for the next hoisting; the upper cover plate 3 is connected to the ball stud 2 by bolts. When the vibration isolation system is working, the retaining frame 9 and the elastic matrix 10 are compressed and deformed under the action of the external load, and the upper cover plate 3 is lowered together with the ball stud 2 and the pressure plate 12, and there is a clearance fit between the upper cover plate 3 and the rubber coating 4 and the pressure plate 12. When the vibration isolation system is subjected to longitudinal and transverse loads, the pressure plate 12 is connected to the upper cover plate through the rubber coating 4, which can not only ensure the vibration isolation effect of the longitudinal and transverse loads, but also play a role in overload protection of the transverse and longitudinal loads, and at the same time limit the automatic self-aligning function of the vibration isolation system to be realized within a certain angle range. A jack can be placed between the ground 14 and the floating plate ballast 15. Due to the spherical connection between the ball bolt 2 and the pressure plate 12, under the support of the jack, the ball bolt 2 floats upward with the floating plate ballast 15, the anchor sleeve 1, and the upper cover plate 3, and the groove between the ball bolt 2 and the pressure plate 12 is partially disengaged; with the further lifting of the jack, the lower end of the upper cover plate 3 rises to a level higher than the upper end of the pressure plate 12. After removing the hexagonal nut 6 and the washer 7 of the bottom plate 11, the vibration isolation device can be easily replaced. The ball bolt 2 and the anchor sleeve 1 are threadedly connected. When the heights of the vibration isolators of various parts of the floating plate ballast are inconsistent, the floating plate ballast can be manually leveled by adjusting the position of the initial thread fit to ensure the horizontal consistency of the floating plate ballast and its vibration isolation device.

[0036] like Figure 3As shown, the upper cover plate 3 is composed of a surrounding plate 31, a top plate 32, longitudinal reinforcing ribs 33, a central reinforcing ring 34, and a transverse reinforcing rib 35. The surrounding plate 31 is welded to the top plate 32, and a hoisting hole is opened at the bottom of the surrounding plate. When hoisting, it is connected with the hoisting hole on the pressure plate through a hoisting bolt 5 to ensure convenient loading and unloading of the vibration isolator; the longitudinal reinforcing ribs 33 and the transverse reinforcing ribs 35 adopt an inclined structure, and their thickness gradually decreases radially from the center part, which ensures the strength of the upper cover plate 3 and saves materials; the center parts of the top plate 32 and the central reinforcing ring 34 are provided with threaded holes, which are threadedly connected with the ball head bolts 2.

[0037] like Figure 4 As shown, the retainer 9 and the elastic matrix 10 are both polymer composite materials. The retainer 9 includes three parts: a retainer outer coating 91, a retainer matrix 92 and a retainer pore 93. The retainer outer coating 91 is mainly anti-corrosion and anti-aging materials. The retainer matrix 92 is a high-temperature resistant, anti-aging, and high-rigidity polymer composite material. The retainer pore 93 should be slightly larger than the outer diameter of the elastic matrix 10, and the height of the retainer pore should be slightly larger than the height of the elastic matrix 10. When the vibration isolator is working, since the height of the elastic matrix 10 is slightly lower than the height of the retainer 9, the retainer 9 is first compressed and deformed. When the height after compression is the same as the height of the elastic matrix 10, the elastic matrix 10 begins to be compressed and deformed. The vibration isolation device adopts a multi-column uniformly distributed structure to ensure that the vibration isolation device is evenly stressed and has a good vibration isolation effect.

[0038] The polymer composite floating slab track bed vibration isolator capable of achieving multi-directional vibration isolation has the advantages that the vibration isolator can achieve multi-directional vibration isolation effect, is easy to install and disassemble, can achieve automatic centering, and has a good vibration isolation effect.

[0039] Preferably, the rigidity of the elastic matrix 10 is higher than that of the rubber retainer 9 .

[0040] Preferably, the elastic matrix 10 is made of chlorine-based laminated rubber material, and the fatigue life of the material is enhanced by a mesh laminated cord structure.

[0041] like Figure 5 As shown, the bottom plate 11 includes a vulcanized plate 111, a guide plate 112 and a positioning hole 113. The vulcanized plate 111 is located in the middle of the bottom plate and is vulcanizedly connected to the upper retaining frame 9 and the elastic matrix 10; the guide plate 112 adopts an inclined plate structure, and its thickness gradually decreases from the center to the surroundings to facilitate the discharge of rainwater, etc.; the size of the positioning hole 113 is slightly larger than the size of the stud bolt 8 to ensure the clearance fit between the stud bolt and the positioning hole.

[0042] Preferably, the bottom plate 11 has an anti-skid pattern on its surface to prevent the vibration isolator from sliding.

Claims

1. A floating plate track bed vibration isolator capable of achieving multi-directional vibration isolation effect, comprising a connecting device, a pressure bearing device and a vibration isolation device, wherein the connecting device comprises a foundation sleeve, a ball stud, a hanging bolt and a bottom plate connecting bolt, wherein the foundation sleeve is pre-buried in the floating plate and connected to the ball stud by threaded fit, wherein the end of the ball stud is hemispherical, wherein the pressure bearing device comprises an upper cover plate, a pressure bearing plate and a bottom plate, wherein the pressure bearing plate and the bottom plate are connected to the vibration isolation device, wherein a rubber coating is arranged inside the upper cover plate, wherein the upper surface is connected to the floating plate, and power is transmitted to the pressure bearing plate through the ball stud, wherein the upper cover plate is provided with a rubber coating ... There is a spherical groove in the middle of the pressure plate, and the spherical groove and the ball stud are spherically connected. The vibration isolation device includes a retaining frame and an elastic matrix. The hardness of the elastic matrix is ​​higher than that of the retaining frame. A hole is opened in the middle of the retaining frame, and the elastic matrix penetrates into the hole of the retaining frame. When the vibration isolator is subjected to a vertical load, the retaining frame and the elastic matrix are compressed and deformed, and the upper cover plate descends together with the ball stud and the pressure plate. When the vibration isolator is subjected to longitudinal and transverse loads, the retaining frame and the elastic matrix are torsionally deformed, and the vibration isolator plays a longitudinal and transverse vibration isolation role.

2. The floating slab track bed vibration isolator according to claim 1, characterized in that: The retaining frame and the elastic matrix are both made of polymer composite materials.

3. The floating slab track bed vibration isolator according to claim 1, characterized in that: When the vibration isolator is subjected to longitudinal and transverse loads, the pressure plate is connected to the upper cover plate through the rubber coating, which can not only ensure the vibration isolation effect of the longitudinal and transverse loads, but also play a role in overload protection of the transverse and longitudinal loads.

4. The floating slab track isolator as claimed in claim 1, wherein the retainer and the elastic matrix are both polymer composite materials, the retainer includes three parts: a retainer outer coating, a retainer matrix and a retainer pore, the retainer outer coating is mainly anti-corrosion and anti-aging material, the retainer matrix is ​​a high temperature resistant, anti-aging and high stiffness coefficient polymer composite material, the retainer pore should be slightly larger than the outer diameter of the elastic matrix, and the height of the retainer pore should be slightly larger than the height of the elastic matrix.

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