CN112813742A - Three-dimensional vibration isolation device for rail transit upper cover structure - Google Patents
Three-dimensional vibration isolation device for rail transit upper cover structure Download PDFInfo
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- CN112813742A CN112813742A CN202110150914.6A CN202110150914A CN112813742A CN 112813742 A CN112813742 A CN 112813742A CN 202110150914 A CN202110150914 A CN 202110150914A CN 112813742 A CN112813742 A CN 112813742A
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- 238000002955 isolation Methods 0.000 title claims abstract description 189
- 229920001971 elastomer Polymers 0.000 claims abstract description 85
- 238000005192 partition Methods 0.000 claims description 41
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 238000004073 vulcanization Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 9
- 244000043261 Hevea brasiliensis Species 0.000 description 4
- 238000013016 damping Methods 0.000 description 4
- 229920003052 natural elastomer Polymers 0.000 description 4
- 229920001194 natural rubber Polymers 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 125000006850 spacer group Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- 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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/36—Bearings or like supports allowing movement
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/01—Elastic layers other than rail-pads, e.g. sleeper-shoes, bituconcrete
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- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention relates to the technical field of vibration and noise control, and discloses a three-dimensional vibration isolation device for a rail transit upper cover structure, which comprises an upper connecting plate, a vertical vibration isolation unit, a middle working plate, a horizontal vibration isolation unit and a lower connecting plate which are sequentially arranged from top to bottom; the vertical vibration isolation unit comprises a box body, and a first rubber layer, a spacing plate and a second rubber layer which are sequentially and fixedly connected in the box body from top to bottom, wherein one end of the box body is provided with an opening, the upper connecting plate is covered and fixed on the opening, and a plurality of first vibration isolation springs are uniformly and fixedly arranged on the first rubber layer at intervals; and a plurality of second vibration isolation springs are fixedly arranged on the second rubber layer at uniform intervals. The invention can effectively reduce the micro-vibration induced by rail transit, improve the vibration reduction effect and effectively solve the problem of vibration noise of the upper cover structure of the rail transit.
Description
Technical Field
The invention relates to the technical field of vibration and noise control, in particular to a three-dimensional vibration isolation device for an upper cover structure of rail transit.
Background
The earthquake is a complex three-dimensional space motion, and comprises a horizontal direction (X, Y direction) and a vertical direction (Z direction), the traditional research on the seismic isolation technology mainly considers the damping effect in the horizontal direction, the seismic damage is mainly caused by the action of the horizontal earthquake, and the vertical earthquake acceleration is only equal to 0.65 of the horizontal acceleration. However, a large number of earthquake records show that the damage effect of the vertical component of the earthquake action on the building cannot be ignored, particularly in a high-intensity area and a seismic center area, the vertical earthquake component is extremely obvious, and on the other hand, the environmental vibration caused by the development of rail transit has influence on the work and life of people, and measures for isolating the vertical vibration are also needed. Therefore, studies on three-dimensional vibration damping devices have been made.
At present, a common three-dimensional vibration isolation device comprises a horizontal support and a vertical support, wherein the horizontal support is a rubber vibration isolation support, a thick rubber vibration isolation support, a friction pendulum vibration isolation support and the like, and the vertical support is a vibration attenuation device which is vertically combined by one or more of a disc spring, a spiral spring, an oil damper and the like.
Different from a common three-dimensional vibration isolation device, the rail transit upper cover structure needs to face long-term and repeated vertical micro vibration induced by a subway, and the rail transit upper cover is of a common micro high-rise or even super high-rise structure, and the support bears large tensile and compressive stress. Therefore, the three-dimensional vibration isolation device for the rail transit upper cover structure is mainly characterized as follows: the vertical micro-vibration induced by subway for a long time can be borne, and the vertical fatigue performance of the support is better; the vertical acceleration induced by the subway and having wide vibration frequency range and tiny vibration can be effectively reduced, and the vertical micro-vibration damping performance is better; can bear the great compressive stress of upper cover structure transmission, vertical bearing capacity satisfies the requirement. However, the existing three-dimensional vibration isolation device is difficult to effectively reduce the vibration and noise induced and transmitted to the upper cover structure by the subway, so that the super high-rise structure of the upper cover of the subway is difficult to meet the standard requirements on the vibration and the noise.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a three-dimensional vibration isolation device for a rail transit cover structure, so as to solve the problem that it is difficult to effectively reduce the vibration and noise induced to be transmitted to the cover structure by the subway in the conventional three-dimensional vibration isolation device.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a three-dimensional vibration isolation device for a rail transit upper cover structure, which comprises an upper connecting plate, a vertical vibration isolation unit, a middle working plate, a horizontal vibration isolation unit and a lower connecting plate which are sequentially arranged from top to bottom; the vertical vibration isolation unit comprises a box body, and a first rubber layer, a spacing plate and a second rubber layer which are sequentially and fixedly connected in the box body from top to bottom, wherein one end of the box body is provided with an opening, the upper connecting plate is covered and fixed on the opening, and a plurality of first vibration isolation springs are uniformly and fixedly arranged on the first rubber layer at intervals; and a plurality of second vibration isolation springs are fixedly arranged on the second rubber layer at uniform intervals.
Preferably, the middle working plate comprises a bottom plate and a support column, one end of the support column is arranged on the upper surface of the bottom plate, a first through hole for the support column to pass through is formed in the bottom of the box body, a second through hole for the support column to pass through is formed in the second rubber layer, the other end of the support column passes through the first through hole and the second through hole and is inserted into the partition plate, and a gap is formed between the upper surface of the bottom plate and the bottom of the box body.
Preferably, the plurality of second isolation springs are located on an outer peripheral side of the second through hole, and the plurality of second isolation springs are uniformly arranged in a circumferential direction of the second rubber layer.
Preferably, a central axis of one of the plurality of first isolation springs is disposed coaxially with a central axis of the first rubber layer, the other first isolation springs of the plurality of first isolation springs are disposed on an outer peripheral side of the central first isolation spring, and the other first isolation springs of the plurality of first isolation springs are uniformly arranged in a circumferential direction of the first rubber layer.
Preferably, the first isolation spring is vulcanized and arranged integrally with the first rubber layer; the second vibration isolation spring and the second rubber layer are vulcanized and arranged into a whole.
Preferably, the first rubber layer is vulcanized and bonded with the upper connecting plate and the partition plate; the second rubber layer is vulcanized and bonded with the partition plate and the bottom of the box body.
Preferably, the lower surface of the middle plate is bonded to the horizontal vibration isolation unit by vulcanization.
Preferably, the diameter of the first rubber layer and the diameter of the second rubber layer are both smaller than the inner diameter of the box body, and the diameter of the partition plate is equal to the inner diameter of the box body.
Preferably, the upper surface of the partition plate and the lower surface of the upper connecting plate are provided with a plurality of first protrusions, each first protrusion corresponds to one first vibration isolation spring, the first protrusions are arranged on the inner peripheral side of the corresponding first vibration isolation spring, the outer diameter of each first protrusion is equal to the inner diameter of the corresponding first vibration isolation spring, the lower surface of the first rubber layer and the upper surface of the first rubber layer are provided with a plurality of first grooves matched with the first protrusions, and the first protrusions are inserted into the first grooves.
Preferably, the lower surface of the partition plate and the bottom of the box body are provided with a plurality of second protrusions, each second protrusion corresponds to one second vibration isolation spring, the second protrusions are arranged on the inner peripheral side of the corresponding second vibration isolation spring, the outer diameter of each second protrusion is equal to the inner diameter of the corresponding second vibration isolation spring, the upper surface of the second rubber layer and the lower surface of the second rubber layer are provided with a plurality of second grooves matched with the second protrusions, and the second protrusions are inserted into the second grooves.
Compared with the prior art, the three-dimensional vibration isolation device for the rail transit upper cover structure has the beneficial effects that:
according to the three-dimensional vibration isolation device for the rail transit upper cover structure, disclosed by the embodiment of the invention, the vertical vibration isolation unit can effectively reduce micro-vibration induced by rail transit by utilizing the fixedly arranged rubber layer and the vibration isolation spring, so that the vibration attenuation effect is improved, and the problem of vibration noise of the rail transit upper cover structure is effectively solved; according to the vibration isolation device, the vertical vibration isolation unit and the horizontal vibration isolation unit are connected in series through the middle working plate, so that the motion decoupling of the three-dimensional vibration isolation device in the horizontal direction and the vertical direction is realized, the functional partitioning of vertical vibration isolation and horizontal vibration isolation is realized, the requirements of vibration isolation and vibration isolation in different directions are met, and the vibration isolation device has a good vibration isolation effect on various vibration sources and horizontal and vertical multi-dimensional vibration input.
Drawings
Fig. 1 is a perspective external view of a three-dimensional vibration isolation device for a rail transit upper cover structure according to an embodiment of the present invention;
fig. 2 is a sectional view of a three-dimensional vibration isolation device for a rail transit cover structure according to an embodiment of the present invention;
fig. 3 is a perspective assembly view of the three-dimensional vibration isolation device for a rail transit upper cover structure according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a case in an embodiment of the present invention;
FIG. 5 is a schematic view of the upper surface structure of a spacer in an embodiment of the present invention;
FIG. 6 is a schematic view of the structure of the lower surface of the partition board in the embodiment of the present invention;
in the figure, 10, an upper connecting plate; 20. a vertical vibration isolation unit; 30. making a plate; 40. a horizontal vibration isolation unit; 50. a lower connecting plate; 60. an upper buttress; 70. a lower buttress;
21. a box body; 211. a first through hole; 212. a second protrusion; 22. a first rubber layer; 221. a first vibration isolation spring; 23. a second rubber layer; 231. a second vibration isolation spring; 232. a second through hole; 24. a partition plate; 241. a first protrusion; 242. a groove;
31. a base plate; 32. and (4) a support column.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The three-dimensional vibration isolation device for the rail transit upper cover structure is used for vibration isolation and vibration reduction of the rail transit upper cover structure and is arranged between an upper support pier 60 and a lower support pier 70, wherein the upper support pier 60 refers to the support pier of the rail transit upper cover structure, and the lower support pier 70 refers to the support pier of the rail transit.
As shown in fig. 1 to 3, a three-dimensional vibration isolation device for a rail transit upper cover structure according to a preferred embodiment of the present invention includes an upper connection plate 10, a vertical vibration isolation unit 20, a middle plate 30, a horizontal vibration isolation unit 40, and a lower connection plate 50, which are sequentially arranged from top to bottom, wherein the upper connection plate 10 is connected to an upper pier 60, and may be connected by bolts; the lower connecting plate 50 is connected with the lower buttress 70 and can be connected through bolts; the vertical vibration isolation unit 20 is used for vertical vibration isolation, the horizontal vibration isolation unit 40 is used for horizontal vibration isolation, and the middle working plate 30 is arranged between the vertical vibration isolation unit 20 and the horizontal vibration isolation unit 40, so that motion decoupling in the horizontal direction and the vertical direction is realized, and functional partitioning of vertical vibration attenuation and horizontal vibration isolation is realized. In this embodiment, the upper connecting plate 10 and the lower connecting plate 50 are both square; in other embodiments, the upper connecting plate 10 and the lower connecting plate 50 may have other shapes, such as rectangular or circular shapes.
Preferably, the vertical vibration isolation unit 20 comprises a box body 21, a first rubber layer 22, a second rubber layer 23 and a partition plate 24, one end of the box body 21 is opened, the upper connecting plate 10 is covered and fixed on the opening, and the covered part can be connected through a bolt; the first rubber layer 22, the spacing plate 24 and the second rubber layer 23 are fixedly connected in sequence from top to bottom in the box body 21, the first rubber layer 22 and the second rubber layer 23 are arranged at intervals and are separated by the spacing plate 24, and preferably, the first rubber layer 22, the upper connecting plate 10 and the spacing plate 24 are vulcanized and bonded; the second rubber layer 23 is vulcanized and bonded with the partition plate 24 and the bottom of the box body 21; a plurality of first vibration isolation springs 221 are fixedly arranged on the first rubber layer 22 at uniform intervals, and preferably, the first vibration isolation springs 221 and the first rubber layer 22 are vulcanized and arranged into a whole; a plurality of second vibration isolation springs 231 are fixedly arranged on the second rubber layer 23 at regular intervals, and preferably, the second vibration isolation springs 231 are integrally vulcanized with the second rubber layer 23. Specifically, the vulcanization setting means that vulcanizing agents are added to the first rubber layer 22 and the second rubber layer 23, respectively, so that the first rubber layer 22 and the second rubber layer 23 are vulcanized and bonded to the plurality of first vibration isolation springs 221 or the plurality of second vibration isolation springs 231, respectively. The plurality of first vibration isolation springs 221 or the plurality of second vibration isolation springs 231 are arranged in parallel, so that the fatigue performance of the vibration isolation springs is good, vibration can be effectively reduced for a long time, and the vibration reduction effect is improved. The first and second isolation springs 221 and 231 may each be a coil spring.
In the invention, the vertical vibration isolation unit 20 meets the vertical pressure-bearing requirement by fixedly arranging the rubber layer and the vibration isolation spring, can effectively reduce the micro-vibration induced by rail transit, improves the vibration attenuation effect and effectively solves the problem of vibration noise of the upper cover structure of the rail transit; according to the vibration isolation device, the vertical vibration isolation unit 20 and the horizontal vibration isolation unit 40 are connected in series through the middle working plate 30, so that the motion decoupling of the three-dimensional vibration isolation device in the horizontal direction and the vertical direction is realized, the functional division of vertical vibration isolation and horizontal vibration isolation is realized, and the requirements of vibration isolation and vibration isolation functions in different directions are met.
As shown in fig. 3, the middle working plate 30 includes a bottom plate 31 and a supporting column 32, one end of the supporting column 32 is disposed on the upper surface of the bottom plate 31, and the other end of the supporting column 32 penetrates through the bottom of the box body 21 and the second rubber layer 23 and is inserted into the partition plate 24, so as to effectively ensure the connection of the vertical vibration isolation unit 20 and the horizontal vibration isolation unit 40, and thus ensure the integrity of the three-dimensional vibration isolation device; correspondingly, the bottom of the box 21 is provided with a first through hole 211 for the end of the supporting column 32 to pass through, the second rubber layer 23 is provided with a second through hole 232 for the end of the supporting column 32 to pass through, and the diameters of the first through hole 211 and the second through hole 232 are equal to the diameter of the supporting column 32; the lower surface of the partition plate 24 is provided with a groove 242 into which the end of the support column 32 is inserted, the shape of the groove 242 matching the outer peripheral shape of the support column 32, and the support column 32 is inserted into the groove 242 without penetrating through the partition plate 24, so that the partition plate 24 can be supported by the support column 32. The bottom plate 31 has a certain thickness, a gap is formed between the upper surface of the bottom plate 31 and the bottom of the box body 21, so that the vertical vibration isolation unit 20 can move vertically, and the vertical vibration isolation unit 20 can move relatively with the support column 32 as an axis. Preferably, the lower surface of the bottom plate 31 is bonded to the horizontal vibration isolation unit 40 by vulcanization.
Preferably, the plurality of second isolation springs 231 are located on the outer circumferential side of the second through hole 232, and the plurality of second isolation springs 231 are uniformly arranged in the circumferential direction of the second rubber layer 23. The center axis of the second isolation spring 231 is disposed in parallel with the center axis of the support column 32. When the outer edge of the second rubber layer 23 is circular, the center connecting lines of the plurality of second isolation springs 231 are circular, and the center connecting lines of the plurality of second isolation springs 231 and the outer edge of the second rubber layer 23 form a concentric ring. For example, as shown in fig. 3, four second vibration isolating springs 231 are provided on the outer peripheral side of the second through hole 232. In other embodiments, the second isolation springs 231 may also be provided in three, five, six, or the like.
Preferably, a central axis of one first isolation spring 221 of the plurality of first isolation springs 221 is disposed coaxially with a central axis of the first rubber layer 22, the other first isolation springs 221 of the plurality of first isolation springs 221 are disposed on an outer peripheral side of the central first isolation spring 221, and the other first isolation springs 221 of the plurality of first isolation springs 221 are uniformly arranged in a circumferential direction of the first rubber layer 22. For example, as shown in fig. 3, one first isolation spring 221 is provided at the center of the first rubber layer 22, four first isolation springs 221 are provided on the outer peripheral side of the center first isolation spring 221, and the four first isolation springs 221 are arranged uniformly in the circumferential direction. When the outer edge of the first rubber layer 22 is circular, the center connecting lines of the four first isolation springs 221 located on the outer peripheral side are circular and form a concentric ring with the outer edge of the first rubber layer 22.
As shown in fig. 3, the supporting column 32 is disposed perpendicular to the bottom plate 31, and the supporting column 32 is disposed coaxially with the central axis of the bottom plate 31; further, the center axis of the support column 32 is aligned with the center axis of the partition plate 24 to support the partition plate 24 with the support column 32, thereby supporting the vertical vibration isolation unit 20.
Alternatively, in this embodiment, the outer edge of the bottom plate 31 is circular, and the supporting column 32 is a cylinder. In other embodiments, the shape of the outer edge of the bottom plate 31 may be other shapes, such as square, and the support column 32 may be a square column or an elliptic column. Further, optionally, the bottom plate 31 and the supporting pillar 32 are both made of steel, and the bottom plate 31 and the supporting pillar 32 may be two independent components or may be integrally formed.
Preferably, the diameter of the first rubber layer 22 and the diameter of the second rubber layer 23 are both smaller than the inner diameter of the box body 21, so that the first rubber layer 22 and the second rubber layer 23 can be deformed transversely when bearing vertical pressure; further, it is preferable that the diameter of the partition plate 24 is equal to the inner diameter of the case 21.
As shown in fig. 5, the upper surface of the partition plate 24 is provided with a plurality of first protrusions 241, the central axes of the plurality of first protrusions 241 are parallel to each other, each first protrusion 241 corresponds to one first vibration isolation spring 221, the first protrusions 241 are disposed on the inner circumferential side of the corresponding first vibration isolation spring 221, the outer diameter of the first protrusions 241 is equal to the inner diameter of the corresponding first vibration isolation spring 221, so as to fix the bottom of the corresponding first vibration isolation spring 221 by the first protrusions 241, correspondingly, the lower surface of the first rubber layer 22 is provided with a plurality of first grooves matched with the first protrusions 241 of the partition plate 24, and the first protrusions 241 of the partition plate 24 are respectively inserted into the corresponding first grooves. Preferably, the first protrusion 241 of the partition plate 24 may have a circular ring shape or a cylindrical shape. The first protrusion 241 of the partition plate 24 has a certain height, and the first protrusion 241 having a ring shape has a certain thickness. Preferably, the height of the first protrusion 241 is 20 mm.
Further, the lower surface of the upper connecting plate 10 is provided with a plurality of first protrusions 241, each first protrusion 241 corresponds to one first vibration isolation spring 221, the first protrusions 241 are disposed on the inner circumferential side of the corresponding first vibration isolation spring 221, and the outer diameter of the first protrusions 241 is equal to the inner diameter of the corresponding first vibration isolation spring 221, so as to fix the top of the corresponding first vibration isolation spring 221 by the first protrusions 241, correspondingly, the upper surface of the first rubber layer 22 is provided with a plurality of first grooves matched with the first protrusions 241 of the upper connecting plate 10, and the first protrusions 241 of the upper connecting plate 10 are respectively inserted into the corresponding first grooves. Preferably, the first protrusion 241 of the upper connection plate 10 may have a circular ring shape or a cylindrical shape. The first protrusion 241 of the upper connecting plate 10 has a certain height, and the first protrusion 241 having a circular ring shape has a certain thickness. Preferably, the height of the first protrusion 241 is 10 mm.
In this embodiment, the first protrusions 241 disposed on the upper surface of the partition plate 24 correspond to the first protrusions 241 disposed on the lower surface of the upper connecting plate 10 one by one, and have the same outer diameter, which is equal to the inner diameter of the corresponding first isolation springs 221, so as to fix the bottom and the top of the same first isolation spring 221, respectively, and thus fix the corresponding first isolation springs 221. In other embodiments, the first protrusion 241 may be provided only on the upper surface of the partition plate 24 or only on the lower surface of the upper connecting plate 10 according to the use requirement.
The shape of the first protrusion 241 provided on the upper surface of the partition plate 24 may be the same as or different from the shape of the first protrusion 241 provided on the lower surface of the upper connecting plate 10; the heights may be the same or different, and the sum of the heights of the first protrusions 241 provided on the upper surface of the partition plate 24 and the first protrusions 241 provided on the lower surface of the upper connection plate 10 is smaller than the height of the first vibration isolation spring 221.
As shown in fig. 6, the lower surface of the partition plate 24 is provided with a plurality of second protrusions 212, the central axes of the plurality of second protrusions 212 are parallel to each other, each of the second protrusions 212 corresponds to one of the second vibration isolation springs 231, the second protrusions 212 are disposed on the inner circumferential side of the corresponding second vibration isolation spring 231, and the outer diameter of the second protrusions 212 is equal to the inner diameter of the corresponding second vibration isolation spring 231 so as to fix the top of the corresponding second vibration isolation spring 231 by the second protrusions 212 of the partition plate 24, correspondingly, the upper surface of the second rubber layer 23 is provided with a plurality of second grooves matched with the second protrusions 212 of the partition plate 24, and the second protrusions 212 of the partition plate 24 are respectively inserted into the corresponding second grooves. Preferably, the second protrusion 212 of the spacing plate 24 may have a circular ring shape or a cylindrical shape. Preferably, the second protrusion 212 of the partition plate 24 has a certain height, and the second protrusion 212 having a circular ring shape has a certain thickness. Preferably, the height of the second protrusion 212 of the partition plate 24 is 10 mm.
As shown in fig. 4, one end of the case 21 is open, and the other end is provided with a first through hole 211. The bottom of the case 21 is provided with a plurality of second protrusions 212, central axes of the plurality of second protrusions 212 are parallel to each other, each of the second protrusions 212 corresponds to one of the second isolation springs 231, the second protrusions 212 are disposed on an inner circumferential side of the corresponding second isolation spring 231, and an outer diameter of each of the second protrusions 212 is equal to an inner diameter of the corresponding second isolation spring 231, so that the bottom of the corresponding second isolation spring 231 is fixed by the second protrusions 212 of the case 21, correspondingly, the lower surface of the second rubber layer 23 is provided with a plurality of second grooves matched with the second protrusions 212 of the case 21, and the second protrusions 212 of the case 21 are respectively inserted into the corresponding second grooves. Preferably, the second protrusion 212 of the case 21 may have a circular or cylindrical shape. Preferably, the second protrusion 212 of the case 21 has a certain height, and the second protrusion 212 having a ring shape has a certain thickness. Preferably, the height of the second protrusion 212 of the case 21 is 20 mm.
In this embodiment, the second protrusions 212 formed on the bottom of the case 21 correspond to the second protrusions 212 formed on the lower surface of the partition plate 24 one by one, and have the same outer diameter, which is equal to the inner diameter of the corresponding second isolation spring 231, so as to fix the bottom and the top of the same second isolation spring 231, respectively, and thus fix the corresponding second isolation spring 231. In other embodiments, the second protrusion 212 may be disposed only on the bottom of the box 21 or only on the lower surface of the partition plate 24 according to the use requirement.
It should be noted that the shape of the second protrusion 212 provided at the bottom of the box 21 and the shape of the second protrusion 212 provided at the lower surface of the partition plate 24 may be the same or different; the heights may be the same or different, and the sum of the heights of the second protrusions 212 provided at the bottom of the case 21 and the second protrusions 212 provided at the lower surface of the partition plate 24 is smaller than the height of the second isolation spring 231.
Optionally, the upper connecting plate 10 is bolted to the box body 21, specifically, the upper connecting plate 10 is bolted to the outer edge of the box body 21; the lower connection plate 50 is bolted to the horizontal vibration isolation unit 40.
It should be noted that the vertical vibration isolation unit 20 of the present invention can not only reduce the micro-vibration induced by rail transit, but also isolate the vertical vibration of the earthquake.
In this embodiment, the horizontal vibration isolation unit 40 is a laminated natural rubber mount, a laminated lead rubber mount, or a high damping rubber mount to perform horizontal vibration isolation. The horizontal vibration isolation unit 40 is preferably a laminated natural rubber mount. The laminated natural rubber support has the characteristics of stable and reliable performance and wide application in the industry, has higher vertical rigidity and vertical bearing capacity, can provide smaller rigidity for the horizontal direction, and is favorable for obtaining a good vibration isolation effect.
In the actual design, according to the actual dynamic characteristics of the vibration-isolated upper cover structure and the vibration-isolated target requirement, the horizontal vibration-isolating unit 40 adopts a laminated natural rubber support or a laminated lead rubber support, and the laminated lead rubber support is provided with a lead rod in the middle of the support, so that the function of dissipating vibration energy can be achieved.
In summary, the embodiment of the present invention provides a three-dimensional vibration isolation device for a rail transit upper cover structure, wherein a vertical vibration isolation unit 20 can effectively reduce micro-vibration induced by rail transit by using a rubber layer and a vibration isolation spring which are vulcanized, so as to improve a vibration attenuation effect and effectively solve a problem of vibration noise of the rail transit upper cover structure; according to the vibration isolation device, the vertical vibration isolation unit 20 and the horizontal vibration isolation unit 40 are connected in series through the middle working plate 30, so that the motion decoupling of the three-dimensional vibration isolation device in the horizontal direction and the vertical direction is realized, the functional division of vertical vibration isolation and horizontal vibration isolation is realized, and the requirements of vibration isolation and vibration isolation functions in different directions are met. The vertical vibration isolation unit 20 and the middle plate 30 are connected in a manner that the supporting columns 32 are inserted into the grooves, so that the connection is more reliable, and the overall performance of the three-dimensional vibration isolation device is exerted.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A three-dimensional vibration isolation device for a rail transit upper cover structure, comprising:
the vibration isolation device comprises an upper connecting plate, a vertical vibration isolation unit, a middle working plate, a horizontal vibration isolation unit and a lower connecting plate which are sequentially arranged from top to bottom;
the vertical vibration isolation unit comprises a box body, and a first rubber layer, a spacing plate and a second rubber layer which are sequentially and fixedly connected in the box body from top to bottom, wherein one end of the box body is provided with an opening, the upper connecting plate is covered and fixed on the opening, and a plurality of first vibration isolation springs are uniformly and fixedly arranged on the first rubber layer at intervals; and a plurality of second vibration isolation springs are fixedly arranged on the second rubber layer at uniform intervals.
2. The three-dimensional vibration isolation device for a rail transit upper cover structure according to claim 1, wherein the middle plate comprises a bottom plate and a supporting column, one end of the supporting column is arranged on the upper surface of the bottom plate, a first through hole for the supporting column to pass through is arranged at the bottom of the box body, a second through hole for the supporting column to pass through is arranged on the second rubber layer, the other end of the supporting column passes through the first through hole and the second through hole and is inserted into the partition plate, and a gap is formed between the upper surface of the bottom plate and the bottom of the box body.
3. The three-dimensional vibration isolation device for a rail transit upper cover structure according to claim 2, wherein a plurality of the second vibration isolation springs are located on an outer peripheral side of the second through hole, and a plurality of the second vibration isolation springs are uniformly arranged in a circumferential direction of the second rubber layer.
4. The three-dimensional vibration isolation device for a rail transit upper cover structure according to claim 1, wherein a central axis of one of the plurality of first vibration isolation springs is disposed coaxially with a central axis of the first rubber layer, other first vibration isolation springs of the plurality of first vibration isolation springs are disposed on an outer peripheral side of the central first vibration isolation spring, and the other first vibration isolation springs of the plurality of first vibration isolation springs are uniformly arranged in a circumferential direction of the first rubber layer.
5. The three-dimensional vibration isolation device for a rail transit upper cover structure according to claim 1, wherein the first vibration isolation spring is vulcanized and arranged integrally with the first rubber layer; the second vibration isolation spring and the second rubber layer are vulcanized and arranged into a whole.
6. The three-dimensional vibration isolation device for a rail transit upper cover structure according to claim 1, wherein the first rubber layer is vulcanization bonded with the upper connecting plate and the spacing plate; the second rubber layer is vulcanized and bonded with the partition plate and the bottom of the box body.
7. The three-dimensional vibration isolation device for a rail transit upper cover structure according to claim 1, wherein the lower surface of the middle plate is vulcanization bonded to the horizontal vibration isolation unit.
8. The three-dimensional vibration isolation device for a rail transit upper cover structure according to claim 1, wherein the diameter of the first rubber layer and the diameter of the second rubber layer are both smaller than the inner diameter of the tank body, and the diameter of the partition plate is equal to the inner diameter of the tank body.
9. The three-dimensional vibration isolating device for a rail transit upper cover structure according to claim 1, wherein the upper surface of the partition plate and the lower surface of the upper connecting plate are each provided with a plurality of first protrusions, each of the first protrusions corresponds to one first vibration isolating spring, the first protrusions are provided on an inner peripheral side of the corresponding first vibration isolating spring, an outer diameter of the first protrusions is equal to an inner diameter of the corresponding first vibration isolating spring, the lower surface of the first rubber layer and the upper surface of the first rubber layer are each provided with a plurality of first grooves which are matched with the first protrusions, and the first protrusions are inserted into the first grooves.
10. The three-dimensional vibration isolating device for a rail transit upper cover structure according to claim 9, wherein the lower surface of the partition plate and the bottom of the tank are each provided with a plurality of second protrusions each corresponding to one second vibration isolating spring, the second protrusions are provided on the inner circumferential side of the corresponding second vibration isolating spring, and the outer diameter of the second protrusions is equal to the inner diameter of the corresponding second vibration isolating spring, and the upper surface of the second rubber layer and the lower surface of the second rubber layer are each provided with a plurality of second grooves matching the second protrusions, into which the second protrusions are inserted.
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| CN112813741A (en) * | 2021-02-03 | 2021-05-18 | 广州大学 | Three-dimensional vibration isolation device for rail transit |
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