CN106438812B - A kind of rubber air spring damper that early stage rigidity is predeterminable - Google Patents
A kind of rubber air spring damper that early stage rigidity is predeterminable Download PDFInfo
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- CN106438812B CN106438812B CN201610906593.7A CN201610906593A CN106438812B CN 106438812 B CN106438812 B CN 106438812B CN 201610906593 A CN201610906593 A CN 201610906593A CN 106438812 B CN106438812 B CN 106438812B
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 86
- 238000007667 floating Methods 0.000 claims abstract description 71
- 229910000831 Steel Inorganic materials 0.000 claims description 113
- 239000010959 steel Substances 0.000 claims description 113
- 238000003825 pressing Methods 0.000 claims description 71
- 206010052904 Musculoskeletal stiffness Diseases 0.000 claims description 24
- 208000002740 Muscle Rigidity Diseases 0.000 claims description 15
- 238000002955 isolation Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 210000000078 claw Anatomy 0.000 claims 1
- 238000000034 method Methods 0.000 description 11
- 238000005265 energy consumption Methods 0.000 description 10
- 238000013016 damping Methods 0.000 description 8
- 230000035939 shock Effects 0.000 description 8
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000005489 elastic deformation Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002775 capsule Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a kind of rubber air spring dampers that early stage rigidity is predeterminable, it is characterized in that, it is additionally provided with backpressure device in the guide sleeve, the backpressure device includes quantity at least three two groups of precompressed cable wires and two pieces of floating platens respectively, wherein, two groups of precompressed cable wires are symmetrically distributed in linear state in the annular space between rubber air spring and guide sleeve rotating around the axis of guide sleeve, and one of one group of precompressed cable wire is separately fixed on the floating platen adjacent with second end cover, other end is separately fixed at across the floating platen adjacent with drive member in drive member, one of another group of precompressed cable wire is separately fixed on the floating platen adjacent with drive member, other end is separately fixed at across the floating platen adjacent with second end cover in second end cover；Tensioning two groups of precompressed cable wires, make the rubber air spring be clamped in always between two pieces of floating platens.
Description
Technical Field
The invention relates to a damping device, in particular to a damper adopting a rubber air spring.
Background
The rubber air spring is a curved capsule formed by attaching rubber and mesh wires, two ends of the capsule are sealed by two steel plates to form a compressed air chamber, and the elasticity effect is realized by utilizing the compressibility of air; because the rubber air spring has nonlinear characteristics and low natural vibration frequency, the rubber air spring is widely applied to some high-frequency vibration occasions as a vibration isolation component, such as automobiles, high-frequency machines, building structures and the like.
People pursue a comprehensive anti-seismic performance combining 'resistance' and 'consumption' for the design of an anti-seismic structure, particularly an anti-seismic structure of a high-rise building, namely the anti-seismic structure can provide extra additional rigidity for a building main body to resist the external load under the action of weak wind vibration and small earthquake, the integrity of the main body structure is kept, and the internal damage of the structure main body is avoided; the anti-seismic structure begins to yield and deform under the action of strong wind vibration and a large earthquake, and external energy is dissipated through the damping effect of the damper in the anti-seismic structure, so that the main body of the structure is not seriously damaged or even collapsed in the strong wind vibration and the large earthquake. The requirement is that the anti-seismic structure can keep rigidity and does not deform under the action of external weak load; the energy can be dissipated by deformation under the action of external strong load. However, the existing seismic isolation element, whether a metal spring damper or a rubber air spring, cannot perfectly meet the seismic requirement, and any spring damper can generate more or less elastic deformation under the action of an external load. The performance of the seismic structure of buildings sought by people is difficult to realize perfectly.
The utility model discloses a utility model patent application with grant publication number CN 204081122U discloses a wind-resistant shock attenuation spring damper for building, this damper with two elastomers (be two coil spring) respectively rigid coupling in the uide bushing on the epaxial middle restriction subassembly of center, when the damper is drawn or is compressed, one of them elastomer is drawn, another elastomer is compressed to realize the wind-resistant shock attenuation. However, the utility model patent obviously has the following disadvantages: 1. two spiral springs are needed, the whole damper is long, and the damper is not suitable for being installed in a space with a small distance; 2. in the process, the equal rigidity (including the tensile rigidity and the compression rigidity) of the two springs is difficult or even impossible to ensure, so that the damping effects are different when the wind directions are different; 3. the early rigidity of the damper cannot be changed, and the aims of presetting the wind resistance level and reducing the damping cost are fulfilled; 4. one helical spring works in two states of stretching and compressing simultaneously, the metal material and the production process of the existing spring are difficult to meet the requirements, and the two working states of stretching and compressing can be realized only by reducing the elastic deformation range of the helical spring, which obviously causes resource waste.
The rubber air springs can only bear compressive load generally, the tensile capacity is weak, and if a damper capable of stretching energy consumption and compressing energy consumption is formed, two rubber air springs are required to respectively bear bidirectional deformation like the wind-resistant damping spring damper for the building; therefore, the rubber air spring as a shock isolation device has the same disadvantages as the wind-resistant damping spring damper for buildings.
The invention patent application with the publication number of CN101457553A discloses a tuned mass damper with adjustable spring stiffness, which is a composite damper, the characteristic frequency of the damper is changed by changing the thickness of a mass block, the damping ratio of the damper is changed by changing the flow of a working medium of the viscous damper, and the stiffness of the damper is changed by changing the effective working length of a spring, wherein three means are adopted for changing the effective working length of the spring, firstly, a section of the spring positioned in a curing cylinder is cured by adopting a curing material, secondly, a constraint block is inserted into the center of a spiral spring and is in interference fit with the spring, so that a section of the spring contacted with the constraint block fails, thirdly, a spiral bulge is arranged on the surface of the constraint block, and the spiral bulge is clamped between spring wires, so that a section of the spring clamped with the spiral bulge between the spring wires fails. The rubber air spring is a closed air chamber with a main body formed by rubber, so the three measures for changing the effective working length of the spring are obviously not suitable for the rubber air spring; in addition, the damping shock absorber in the form not only obviously shortens the effective working length of the spring, but also can only compress energy consumption and damp and cannot stretch the energy consumption and damp.
Disclosure of Invention
The invention aims to solve the technical problem of providing a rubber air spring damper with the preset early stiffness, which not only can preset the early stiffness, but also can compress energy consumption and reduce vibration and stretch energy consumption and reduce vibration only by adopting one rubber air spring.
The technical scheme for solving the technical problems is as follows:
a rubber air spring damper with predesigned early rigidity comprises a guide sleeve, wherein one end of the guide sleeve is provided with a first end cover, and the other end of the guide sleeve is provided with a second end cover; the guide sleeve is internally and coaxially provided with a spring, a driving member extends into the guide sleeve from the outer side of the first end cover and comprises a movable platen and a driving rod, wherein the movable platen is positioned at the head part of the spring, and the driving rod is arranged on the movable platen and extends out of the guide sleeve along the axis of the guide sleeve; it is characterized in that the preparation method is characterized in that,
the spring is a rubber air spring, the outer diameter of the rubber air spring is smaller than the inner diameter of the guide sleeve, and an annular space is formed between the rubber air spring and the guide sleeve;
the guide sleeve is also internally provided with a back pressure device which comprises two groups of prepressing steel cables and two floating press plates, wherein the number of the prepressing steel cables is at least three respectively,
one floating pressing plate is arranged between the movable pressing plate and the rubber air spring, and the other floating pressing plate is arranged between the second end cover and the rubber air spring;
the two groups of prepressing steel cables are symmetrically distributed in the annular space in a linear state around the axis of the guide sleeve respectively, one end of each group of prepressing steel cables is fixed on the floating pressing plate adjacent to the second end cover respectively, the other end of each group of prepressing steel cables penetrates through the floating pressing plate adjacent to the movable pressing plate and is fixed on the movable pressing plate respectively, one end of each group of prepressing steel cables is fixed on the floating pressing plate adjacent to the movable pressing plate respectively, and the other end of each group of prepressing steel cables penetrates through the floating pressing plate adjacent to the second end cover and is fixed on the second;
through holes penetrating through the prepressing steel cables are respectively arranged at the positions of the floating pressing plate penetrating through the prepressing steel cables, and the aperture of each through hole is larger than the diameter of each through hole;
the guide sleeve and the two floating pressure plates are respectively in movable fit;
and tensioning the two groups of prepressing steel cables to ensure that the distance between the two floating pressure plates is equal to the length of compressing the rubber air spring to preset early rigidity.
In the above scheme, the pre-pressed steel cable may be a steel cable or a pre-stressed steel strand.
The working principle of the rubber air spring damper is as follows: when the dynamic load is relatively acted along the axis of the guide sleeve, the driving component compresses the rubber air spring downwards; when the dynamic load acts along the axis of the guide sleeve in a reverse manner, the two groups of prepressing steel ropes pull the two floating press plates to move oppositely to compress the rubber air spring. Therefore, the rubber air spring can be compressed by the axial dynamic load acting on the damper in an opposite or reverse mode, and the rubber air spring is elastically deformed to consume energy.
According to the working principle, the prepressing steel rope and the hole wall of the through hole in the floating pressing plate cannot generate friction in the working process, otherwise, the up-and-down movement of the floating pressing plate is interfered, so that the diameter of the through hole in the floating pressing plate is larger than that of the prepressing steel rope, and the up-and-down movement of the floating pressing plate is preferably not interfered and influenced.
According to the rubber air spring damper with the preset early stiffness, two ends of the prepressing steel cable can be anchored, and can also be tied and fixed by similar lifting ring screws, so that if the two ends of the prepressing steel cable are both anchored or tied and fixed by the lifting ring screws, the tension can be preset only by calculating in advance and strictly controlling the length of the prepressing steel cable to achieve the purpose of presetting the early stiffness, and the purpose of presetting the early stiffness is further achieved. However, in the actual production and debugging process, the method for controlling the length of the pre-pressed steel cable to achieve the purpose of presetting the early stiffness has two problems that firstly, an error is generated in the anchoring or tying process, and secondly, even if the error generated in the welding or tying process is controlled, the pre-pressed steel cable can also cause the change of characteristic parameters in the cutting and placing processes. In order to solve the technical problem, an improved scheme of the invention is as follows:
the other ends of the two groups of prepressing steel cables are respectively fixed on the movable platen and the second end cover by steel cable self-locking anchors; the steel cable self-locking anchorage device consists of a mounting hole, a clamping jaw and a check bolt, wherein,
the mounting hole is formed in the movable platen or the second end cover; the mounting hole consists of a section of taper hole and a section of threaded hole, wherein the taper hole is positioned at one side close to the floating pressure plate, the pointed end points to the floating pressure plate, and the threaded hole is positioned at one side far away from the floating pressure plate;
the clamping jaw is conical and matched with the taper hole, and consists of 3-5 petals, and a clamping hole for clamping a corresponding prepressing steel cable is formed in the clamping jaw along the axis;
the check bolt is matched with the threaded hole, and a round hole with the diameter larger than that of the prepressing steel cable is arranged in the body along the axis;
the clamping jaw is installed in the taper hole, and the anti-loosening bolt is installed in the threaded hole.
According to the improved scheme, one end of a first group of prepressing steel ropes is completely fixed on a second floating pressing plate, the other end of the first group of prepressing steel ropes penetrates out of clamping holes and round holes of the steel rope self-locking anchorage, one end of a second group of prepressing steel ropes is completely fixed on a first floating pressing plate, the other end of the second group of prepressing steel ropes penetrates out of clamping holes and round holes of the steel rope self-locking anchorage, so that the exposed rope ends can be tied on a traction tensioning machine, and the compression amount (namely the tensioning distance) of a rubber air spring is monitored while traction tensioning is carried out, so that the distance between the two floating pressing plates is determined; when the distance between the two floating pressing plates is equal to the length of the rubber air spring which is compressed to meet the early rigidity, the locking bolt is screwed to push the clamping jaw to clamp and lock the prepressing steel cable (at the moment, the second end cover and the floating pressing plate adjacent to the second end cover are required to be tightly attached together); when in use, the two groups of pre-pressed steel ropes can not loosen even under the conditions of repeated tensioning and relaxation in the vibration process.
In order to prevent the two ends of the rubber air spring from sliding on the floating pressure plate, the invention has another improvement scheme that: and two ends of the rubber air spring are respectively embedded in the positioning rings.
The damper can be widely applied to various one-dimensional shock insulation fields, such as isolation of internal vibration of mechanical equipment, shock insulation of equipment foundations, shock resistance reinforcement of building structures, shock insulation of building foundations and the like.
The damper has the following beneficial effects:
(1) the damper can be subjected to positive or negative axial external force only by one rubber air spring, and the rubber air spring can generate elastic compression deformation to consume energy, so that one rubber air spring is saved, and the length of the damper is greatly shortened.
(2) When the dynamic load is larger than the early rigidity resisting capacity of the damper, the bidirectional elastic deformation is symmetrical, so that the compression deformation and energy consumption effects of the external force load are not influenced by the positive and negative direction changes of the external force load.
(3) The early stiffness of the whole damper can be changed by changing the length of the prepressing steel cable, and when the early stiffness is larger than zero, the damper cannot be deformed by external force before overcoming the early stiffness, so that when the damper is used for building structure earthquake resistance, the earthquake fortification grade can be preset, and the earthquake insulation cost is obviously reduced.
(4) The early stiffness of the damper can be preset by presetting the length of the prepressing steel cable, but the effective working length of the rubber air spring is unchanged, and the original characteristic parameters of the rubber air spring cannot be changed.
Drawings
Fig. 1 to 7 are schematic structural views of an embodiment of a damper according to the present invention, in which fig. 1 is a front view (cross-sectional view), fig. 2 is a cross-sectional view a-a of fig. 1, fig. 3 is a cross-sectional view B-B of fig. 1, fig. 4 is a bottom view, fig. 5 is an enlarged view of a portion i of fig. 1, fig. 6 is an enlarged view of a portion ii of fig. 1, and fig. 7 is an enlarged view of a portion iii of fig. 2.
Fig. 8 to 13 are schematic structural views of a second embodiment of the damper of the present invention, wherein fig. 8 is a front view (cross-sectional view), fig. 9 is a C-C cross-sectional view of fig. 8, fig. 10 is a D-D cross-sectional view of fig. 8, fig. 11 is a bottom view, fig. 12 is an enlarged view of a portion iv of fig. 8, and fig. 13 is an enlarged view of a portion v of fig. 9.
Fig. 14 to 16 are schematic structural views of the steel cable self-locking anchor device in the embodiment shown in fig. 8 to 13, in which fig. 14 is a front view (a sectional view, in which a two-dot chain line indicates a pre-stressed steel cable), fig. 15 is a top view, and fig. 16 is a sectional view E-E of fig. 14.
Fig. 17 to 21 are schematic structural views of a damper according to a third embodiment of the present invention, in which fig. 17 is a front view (sectional view), fig. 18 is a sectional view from F to F of fig. 17, fig. 19 is a sectional view from G to G of fig. 17, fig. 20 is a sectional view from H to H of fig. 17, and fig. 21 is a bottom view.
Detailed Description
Example 1
Referring to fig. 1, the early rubber air spring damper with predefinable stiffness in this example is an energy consumption device for earthquake-proof reinforcement of a building structure, and includes a guide sleeve 1, and a first end cap 2 and a second end cap 3 respectively disposed at two ends of the guide sleeve 1, wherein the first end cap 2 and the second end cap 3 are respectively fixedly connected to two ends of the guide sleeve by screws. A rubber air spring 4 is axially arranged in the guide sleeve 1, and a driving member extends into the guide sleeve 1 from the center of the first end cover 2 and is pressed on the rubber air spring 4; the driving component comprises a movable platen 5 which is positioned at the upper end of the rubber air spring 4 and is in movable fit with the guide sleeve 1 and a driving rod 5-1 which extends upwards from the upper surface of the movable platen 5 to the guide sleeve 1, the tail end of the driving rod 5-1, which is positioned outside the guide sleeve 1, is provided with a connecting ring 5-2 with a hinge hole 14, and the connecting ring 5-2 and the driving rod 5-1 are butted together in a threaded connection mode.
Referring to fig. 1-3 in combination with fig. 6, a bag wall 4-1 of the rubber air spring 4 in this example is formed by three curved bags connected in series, a waist ring 4-2 is hooped on the outer wall of the transition of any two adjacent curved bags, two ends of the bag wall 4-1 are sealed by sealing end plates 4-3, the sealing end plates 4-3 are matched with connecting flanges 4-4 to clamp the edge of the end part of the bag wall 4-1 between the two, and compressed air is filled in the bag wall 4-1. The outer diameter of the rubber air spring 4 is smaller than the inner diameter of the guide sleeve 1, and an annular space is formed between the two.
Referring to fig. 1 and 4, the second end cap 3 is provided at an outer side thereof with two connecting ear plates 13 integrally connected thereto, and each connecting ear plate 13 is provided with a hinge hole 14.
Referring to fig. 1-7, a back pressure device is arranged in the guide sleeve 1, and comprises two groups of prepressing steel cables and two floating press plates; the two groups of pre-pressing steel cables are a first group of pre-pressing steel cables 8 consisting of three pre-pressing steel cables and a second group of pre-pressing steel cables 9 consisting of five pre-pressing steel cables; the two floating pressing plates are a first floating pressing plate 6 arranged between a movable pressing plate 5 of the driving component and the rubber air spring 4 and a second floating pressing plate 7 arranged between the second end cover 3 and the rubber air spring 4, and the two floating pressing plates are respectively in movable fit with the inner wall of the guide sleeve 1.
Referring to fig. 1 to 7, the two groups of pre-pressed steel cables are respectively and symmetrically distributed in the annular space around the axis of the guide sleeve 1 in a linear state, each pre-pressed steel cable is parallel to the axis of the guide sleeve 1, and the distance from the first group of pre-pressed steel cables 8 to the axis of the guide sleeve is equal to the distance from the second group of pre-pressed steel cables 9 to the axis of the guide sleeve; the lower ends of the first group of prepressing steel cables 8 are respectively fixed on the second floating pressing plate 7 by lifting ring screws 12, and the upper ends of the first group of prepressing steel cables respectively penetrate through the first floating pressing plate 6 and are fixed on the movable pressing plate 5 by the lifting ring screws 12; the upper ends of the second group of prepressing steel cables 9 are respectively fixed on the first floating pressing plate 6 by lifting ring screws 12, and the lower ends pass through the second floating pressing plate 7 and are fixed on the second end cover 3 by the lifting ring screws 12; a first through hole 10 for each first group of pre-pressing steel cables 8 to pass through is formed in the position, through which each first group of pre-pressing steel cables 8 passes, of the first floating pressing plate 6, and the diameter of the first through hole 10 is larger than that of the first group of pre-pressing steel cables 8; a second through hole 11 for each second set of pre-pressing steel cables 9 to pass through is formed in the position, through which each second set of pre-pressing steel cables 9 passes, of the second floating pressing plate 7, and the diameter of the second through hole 11 is larger than that of the second set of pre-pressing steel cables 9; the method for fixing the two ends of the prepressing steel cable on the corresponding components by the lifting ring screws comprises the following steps: the eye screw 12 is fixed to the corresponding component, and then one end of the pre-pressed steel cable is tied to the eye of the eye screw and fixed by a steel cable clamp (not shown).
The pre-stressed steel cable in the embodiment can be a steel wire rope or a pre-stressed steel strand, and can be selected according to actual requirements during specific implementation.
Referring to fig. 1-3 and fig. 6, positioning rings 15 with inner diameters matched with the outer diameters of the sealing end plates 4-3 of the rubber air springs 4 are respectively arranged on the opposite surfaces of the first floating pressing plate 6 and the second floating pressing plate 7, and the sealing end plates 4-3 at the two ends of the rubber air springs 4 are respectively embedded in the positioning rings 15 on the first floating pressing plate 6 and the second floating pressing plate 7.
In order to achieve the purpose of presetting the early stiffness, the installation and tensioning method of the two pre-pressed steel ropes is as follows: (1) firstly, determining the compression amount of the rubber air spring 4 according to the preset early stiffness and the characteristic curve of the rubber air spring 4, and further calculating the length of each first group of prepressing steel cables 8 and each second group of prepressing steel cables 9; (2) connecting the rubber air spring 4, the back pressure device and the driving member according to the figures 1-3, then repeatedly adjusting to enable the actual length of each prepressing steel cable to be equal to the calculated length, fixing the prepressing steel cable by using a common steel cable clamp (not shown in the figures), and clamping the rubber air spring 4 between a first floating pressing plate 6 and a second floating pressing plate 7 all the time; (3) and (3) sleeving a guide sleeve 1, covering a first end cover 2 and a second end cover 3, and finally butting a connecting ring 5-2 and a driving rod 5-1 to obtain the rubber air spring damper with predesigned early stiffness.
Referring to fig. 1, the two sets of pre-pressing steel cables respectively pull the two floating press plates to compress the rubber air springs 4 to provide pre-pressing force for the rubber air springs, and the pre-pressing force can be adjusted by changing the lengths of the pre-pressing steel cables, so that the purpose of presetting the rigidity of the rubber air springs is achieved. When the damper is subjected to an axial external load, the rubber air spring 4 will not continue to deform, whether the external load is a compressive load or a tensile load, as long as it is less than the pre-pressure. When the external load is greater than the pre-pressure, if the external load is pressure, the movable platen 5 pushes the first floating platen 6 to continue to compress the rubber air spring 4 to generate elastic deformation energy consumption, and if the external load is pulling force, the two groups of pre-pressing steel cables respectively pull the two floating platens to move relatively to compress the rubber air spring 4 to generate elastic deformation energy consumption. Because the finally generated deformation is the compression deformation of the same rubber air spring 4 no matter the dynamic load borne by the damper is pulling or pressing, the bidirectional elastic deformation of the damper is necessarily symmetrical.
Example 2
This example differs from example 1 as follows:
referring to fig. 8-10, the first set of pre-pressed steel cables 8 and the second set of pre-pressed steel cables 9 are composed of three steel cables.
Referring to fig. 8 to 13, the upper end of the first set of pre-pressed steel cables 8 and the lower end of the second set of pre-pressed steel cables 9 are respectively fixed on the movable platen 5 and the second end cap 3 by using a steel cable self-locking anchorage device 16 instead of the lifting bolt in example 1.
Referring to fig. 14 to 16 in combination with fig. 7, the steel cable self-locking anchor 16 is composed of a mounting hole provided on a mounting plate 16-1, a clamping jaw 16-2 and a locking bolt 16-4, wherein the mounting plate 16-1 is the movable platen 5 or the second end cap 3. The axis of the mounting hole is collinear with the straight line where the corresponding pre-pressing steel cable is located; the mounting hole comprises a section of taper hole and a threaded hole, wherein the taper hole is positioned at one side close to the floating pressure plate, the pointed end points to the floating pressure plate, and the threaded hole is positioned at the other side far away from the floating pressure plate. The clamping jaw 16-2 is conical matched with the taper hole and consists of 3 petals, and a clamping hole 16-3 for clamping a corresponding prepressing steel cable is arranged in the body along the axis. The check bolt 16-4 is matched with the threaded hole, and a round hole 16-5 with the diameter larger than that of the corresponding prepressing steel cable is arranged in the body along the axis. The clamping jaw 16-2 is arranged in the taper hole, the anti-loose bolt 16-4 is arranged in the threaded hole, and the anti-loose bolt 16-4 is screwed to push the clamping jaw 16-2 to clamp and lock a corresponding pre-pressing steel cable penetrating through the clamping hole 16-3; the tail end of the corresponding steel cable penetrates out of the round hole 16-5 of the corresponding check bolt 16-4.
After the damper is manufactured and assembled according to the scheme of the embodiment, the rope ends of the exposed first group of prepressing steel ropes 8 and the second group of prepressing steel ropes 9 are tied on a traction tensioning machine, and the compression amount (namely the tensioning distance) of the rubber air spring 4 is monitored while traction tensioning is carried out so as to determine the distance between the two floating press plates; when the distance between the two floating pressing plates is equal to the length of compressing the rubber air spring 4 to meet the early rigidity, the locking bolt 16-4 is screwed to push the clamping jaw 16-2 to clamp and lock the pre-pressed steel cable, so that the rubber air spring 4 is always clamped between the first floating pressing plate 6 and the second floating pressing plate 7.
The method of carrying out the present embodiment other than the above is the same as that of example 1.
Example 3
Referring to fig. 17 to 21, the rubber air spring damper with a predefinable early stiffness in this example is a vibration isolation device (also called vibration isolation support) that can be used for vertical vibration isolation of a building, and the following differences are mainly found in this example compared with example 2:
1. as a vibration isolation support, for the convenience of installation, in this example, the connection lug plate arranged on the second end cap 3 in example 2 is omitted, the second end cap 3 extends axially downwards from the edge and then radially outwards, and the edge is uniformly provided with connection bolt holes 18, the second end cap 3 is used as a base of the vibration isolation support, wherein the length of the downward axial extension is greater than the length of the steel cable self-locking anchorage device 16 exposed at the outer part of the second end cap 3. The driving rod 5-1 of the driving member is a metal tube fixedly connected with the upper surface of the movable platen 5 through a bolt, the end part of the metal tube outside the guide sleeve 1 is provided with a connecting supporting plate 17, and the connecting supporting plate 17 is also provided with a connecting bolt hole 18.
2. The bag wall 4-1 of the rubber air spring 4 consists of two curved bags which are connected in series; the first set of pre-pressed steel cables 8 and the second set of pre-pressed steel cables 9 are respectively composed of five steel cables.
Other embodiments than the above-described embodiment are the same as embodiment 2.
Claims (6)
1. A rubber air spring damper with predesigned early rigidity comprises a guide sleeve, wherein one end of the guide sleeve is provided with a first end cover, and the other end of the guide sleeve is provided with a second end cover; the guide sleeve is internally and coaxially provided with a spring, a driving member extends into the guide sleeve from the outer side of the first end cover and comprises a movable platen and a driving rod, wherein the movable platen is positioned at the head part of the spring, and the driving rod is arranged on the movable platen and extends out of the guide sleeve along the axis of the guide sleeve; it is characterized in that the preparation method is characterized in that,
the spring is a rubber air spring, the outer diameter of the rubber air spring is smaller than the inner diameter of the guide sleeve, and an annular space is formed between the rubber air spring and the guide sleeve;
the guide sleeve is internally provided with a back pressure device, the back pressure device comprises two groups of prepressing steel cables and two floating press plates, and the number of each group of prepressing steel cables is at least three; wherein,
one floating pressing plate is arranged between the movable pressing plate and the rubber air spring, and the other floating pressing plate is arranged between the second end cover and the rubber air spring;
the two groups of prepressing steel cables are symmetrically distributed in the annular space in a linear state around the axis of the guide sleeve respectively, one end of each group of prepressing steel cables is fixed on the floating pressing plate adjacent to the second end cover respectively, the other end of each group of prepressing steel cables penetrates through the floating pressing plate adjacent to the movable pressing plate and is fixed on the movable pressing plate respectively, one end of each group of prepressing steel cables is fixed on the floating pressing plate adjacent to the movable pressing plate respectively, and the other end of each group of prepressing steel cables penetrates through the floating pressing plate adjacent to the second end cover and is fixed on the second;
through holes penetrating through the prepressing steel cable are respectively arranged at the positions of the two floating pressing plates penetrating through the prepressing steel cable, and the aperture of each through hole is larger than the diameter of the penetrating prepressing steel cable;
the guide sleeve and the two floating pressure plates are respectively in movable fit;
and tensioning the two groups of prepressing steel cables to ensure that the distance between the two floating pressure plates is equal to the length of compressing the rubber air spring to preset early rigidity.
2. The rubber air spring damper with the predefinable early stiffness as claimed in claim 1, wherein the rubber air spring damper with the predefinable early stiffness is a damper for seismic reinforcement of building structures.
3. The rubber air spring damper with the predefinable early stiffness as claimed in claim 1, wherein the rubber air spring damper with the predefinable early stiffness is a vertical seismic isolation device for earthquake resistance of buildings.
4. The rubber air spring damper with predefinable early stiffness as claimed in claim 1, 2 or 3, wherein the pre-stressed steel cable is a steel wire rope or a pre-stressed steel strand.
5. The rubber air spring damper with predefinable early stiffness as claimed in claim 4, wherein the other ends of the two sets of pre-pressed steel cables are respectively fixed by steel cable self-locking anchors, wherein the other end of one set of pre-pressed steel cables is fixed on the movable platen, and the other end of the other set of pre-pressed steel cables is fixed on the second end cap; the steel cable self-locking anchorage device consists of a mounting hole, a clamping jaw and a check bolt, wherein,
the mounting hole is formed in the movable platen or the second end cover; the mounting hole consists of a section of taper hole and a section of threaded hole, wherein the taper hole is positioned at one side close to the floating pressure plate, the pointed end points to the floating pressure plate, and the threaded hole is positioned at one side far away from the floating pressure plate;
the clamping jaw is conical and matched with the conical hole, and consists of 3-5 claw pieces, and a clamping hole for clamping a corresponding prepressing steel cable is formed in the clamping jaw along the axis;
the check bolt is matched with the threaded hole, and a round hole with the diameter larger than that of the prepressing steel cable is arranged in the body along the axis;
the clamping jaw is installed in the taper hole, and the anti-loosening bolt is installed in the threaded hole.
6. The rubber air spring damper with predefinable early stiffness as claimed in claim 5, wherein the two floating pressure plates are provided with a positioning ring on their opposite surfaces, and the two ends of the rubber air spring are embedded in the positioning rings.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610906593.7A CN106438812B (en) | 2016-10-17 | 2016-10-17 | A kind of rubber air spring damper that early stage rigidity is predeterminable |
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| CN201610906593.7A CN106438812B (en) | 2016-10-17 | 2016-10-17 | A kind of rubber air spring damper that early stage rigidity is predeterminable |
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| CN106438812B true CN106438812B (en) | 2018-07-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107218329A (en) * | 2017-06-16 | 2017-09-29 | 重庆朗福环保科技有限公司 | A kind of rubber air spring and its application |
| CN112303171B (en) * | 2019-07-31 | 2022-01-07 | 比亚迪股份有限公司 | Air spring and vehicle with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| BE793106A (en) * | 1971-12-23 | 1973-06-20 | Allinquant F M | ADVANCED TELESCOPIC HYDRAULIC SHOCK ABSORBERS |
| JP2005307724A (en) * | 2004-04-23 | 2005-11-04 | Eiyuai:Kk | Earthquake-resistant foundation using synthetic rubber, piano wire and steel plate |
| CN202298970U (en) * | 2011-09-30 | 2012-07-04 | 福州大学 | Device having three-dimensional seismic isolation and anti-turnover structure |
| CN103161864B (en) * | 2013-03-15 | 2015-07-15 | 重庆大学 | Three-directional friction adjustable strong-impact-resisting vibration isolator |
| CN103437447B (en) * | 2013-09-10 | 2015-07-22 | 隔而固(青岛)振动控制有限公司 | Low-frequency swing-type tuned mass damper |
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Denomination of invention: A rubber air spring damper with preset early stiffness Effective date of registration: 20230510 Granted publication date: 20180720 Pledgee: Anhui Guangde Rural Commercial Bank Co.,Ltd. Qiuchun Branch Pledgor: ANHUI LONGXING SEALING ELEMENT CO.,LTD. Registration number: Y2023980040281 |
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