CN106382316B - A kind of complex spring damper that can adjust early stage rigidity - Google Patents
A kind of complex spring damper that can adjust early stage rigidity Download PDFInfo
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- CN106382316B CN106382316B CN201610906467.1A CN201610906467A CN106382316B CN 106382316 B CN106382316 B CN 106382316B CN 201610906467 A CN201610906467 A CN 201610906467A CN 106382316 B CN106382316 B CN 106382316B
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- 238000007667 floating Methods 0.000 claims abstract description 54
- 229910000831 Steel Inorganic materials 0.000 claims description 79
- 239000010959 steel Substances 0.000 claims description 79
- 239000002131 composite material Substances 0.000 claims description 66
- 238000003825 pressing Methods 0.000 claims description 54
- 206010052904 Musculoskeletal stiffness Diseases 0.000 claims description 27
- 238000002955 isolation Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 description 16
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 230000035939 shock Effects 0.000 description 10
- 239000002184 metal Substances 0.000 description 9
- 208000002740 Muscle Rigidity Diseases 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 8
- 238000013016 damping Methods 0.000 description 6
- 230000005489 elastic deformation Effects 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 230000002457 bidirectional effect Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal 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
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 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
- F16F7/00—Vibration-dampers; Shock-absorbers
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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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- 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
- F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
- F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
- F16F3/10—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction
- F16F3/12—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction the steel spring being in contact with the rubber spring
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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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
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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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/08—Functional characteristics, e.g. variability, frequency-dependence pre-stressed
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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
- F16F2238/00—Type of springs or dampers
- F16F2238/02—Springs
- F16F2238/026—Springs wound- or coil-like
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a kind of complex spring damper that can adjust early stage rigidity, it is characterized in that, backpressure device is additionally provided with the guide sleeve, the backpressure device includes two groups of precompressed cable wires and two pieces of floating platens, wherein, two groups of precompressed cable wires are symmetrically distributed in the annular space between complex spring and guide sleeve rotating around the axis of guide sleeve with linear state, and one of one group of precompressed cable wire is separately fixed on the floating platen adjacent with the second end cap, other end is separately fixed in drive member through the floating platen adjacent with 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 second end through the floating platen adjacent with the second end cap and covers, string has wire tensioner in the middle part of each precompressed cable wire；Two groups of precompressed cable wires are tensioned, the complex spring is clamped in all the time between two pieces of floating platens.
Description
Technical Field
The invention relates to a damping device, in particular to a damper adopting a composite spring.
Background
The composite spring is a rubber metal spiral composite spring, which is formed by wrapping a layer of rubber material around a metal spiral spring and compounding and vulcanizing the rubber material. The composite spring has the non-linear characteristic of a rubber spring, also has the characteristics of large deformation and large bearing capacity of a metal spiral spring, and has better stability and bearing capacity than the rubber spring. The composite spring has a working characteristic curve similar to that of the rubber air spring, but has a simpler structure and no risk of gas leakage compared with the rubber air spring, so that the composite spring is also used for replacing the rubber air spring and is widely applied to energy dissipation and vibration reduction of large-scale vibration equipment such as mining equipment, metallurgy equipment, coal equipment and the like and shock insulation of buildings.
The single metal spiral spring can only work in one state of extension or compression (so-called tension spring or compression spring), while the rubber spring can only work in a compression state and has weak tensile capacity, so that the composite spring formed by compounding and vulcanizing the metal spiral spring and the rubber spring is usually a compression spring and can only realize unidirectional vibration reduction. If the composite spring is used for bidirectional vibration reduction, at least two composite springs are used to form a damper, and the compression elastic deformation of the two composite springs is used for reducing bidirectional vibration respectively.
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 initial rigidity of the damper cannot be changed, and the aims of presetting the wind resistance level and reducing the damping cost are achieved; 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. If the composite spring is used for resisting wind and reducing vibration, the two composite springs are obviously used for forming the wind-resisting damper like the utility model, and the damper formed by the composite spring obviously has the same defects as the utility model.
In addition, 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 action of external load under the action of weak wind vibration and small earthquake, the integrity of the main body structure is maintained, 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 shock insulation element, no matter a metal spring damper or a rubber air spring, cannot perfectly meet the shock resistance requirement.
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 three means described above for varying the effective working length of the spring are clearly not applicable to compound springs; 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 composite spring damper capable of adjusting early stiffness, which not only can adjust the early stiffness, but also can compress and stretch energy dissipation and vibration reduction only by adopting one composite spring.
The technical scheme for solving the technical problems is as follows:
a composite spring damper capable of adjusting early stiffness 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 composite spring (all called as a rubber metal spiral composite spring), the outer diameter of the composite spring is smaller than the inner diameter of the guide sleeve, and an annular space is formed between the composite 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 with at least three, two floating press plates and rigging screw buckles with the sum of the two groups of prepressing steel cables,
one of the two floating pressure plates is arranged between the movable pressure plate and the composite spring, and the other floating pressure plate is arranged between the second end cover and the composite 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;
the rigging screw buckle is connected in series with the middle part of the prepressing steel cable;
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 for compressing the composite spring to the preset early stiffness.
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 composite spring damper is as follows: when the dynamic load is relatively acted along the axis of the guide sleeve, the driving member compresses the compound 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 pressure plates to move oppositely to compress the composite spring. Therefore, the composite spring can be compressed by axial dynamic load acting on the damper oppositely or reversely, so that the composite 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 composite spring damper capable of adjusting the early stiffness, two ends of the prepressing steel cable can be anchored, and can also be tied and fixed by similar lifting ring screws.
In order to prevent the two ends of the compound spring from sliding on the floating pressure plate, the invention has another improvement scheme that: and two ends of the composite 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) only one composite spring is needed to ensure that the damper can generate elastic compression deformation to consume energy no matter the damper is subjected to positive or reverse axial external force, so that one composite 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 length of the prepressing steel cable can be changed by adjusting the rigging turnbuckle, so that the early stiffness of the damper is changed, but the effective working length of the composite spring is unchanged, and the original characteristic parameters of the composite spring cannot be changed.
Drawings
3 fig. 3 1 3 to 3 7 3 are 3 schematic 3 structural 3 views 3 of 3 an 3 embodiment 3 of 3a 3 damper 3 according 3 to 3 the 3 present 3 invention 3, 3 in 3 which 3 fig. 3 1 3 is 3a 3 front 3 view 3 ( 3 cross 3- 3 sectional 3 view 3) 3, 3 fig. 3 2 3 is 3a 3 cross 3- 3 sectional 3 view 3a 3- 3a 3 of 3 fig. 3 1 3, 3 fig. 3 3 3 is 3a 3 cross 3- 3 sectional 3 view 3 b 3- 3 b 3 of 3 fig. 3 1 3, 3 fig. 3 4 3 is 3a 3 bottom 3 view 3, 3 fig. 3 5 3 is 3 an 3 enlarged 3 view 3 of 3a 3 portion 3 i 3 of 3 fig. 3 1 3, 3 fig. 3 6 3 is 3 an 3 enlarged 3 view 3 of 3a 3 portion 3 ii 3 of 3 fig. 3 1 3, 3 and 3 fig. 3 7 3 is 3 an 3 enlarged 3 view 3 of 3a 3 portion 3 iii 3 of 3 fig. 3 2 3. 3
Fig. 8 to 11 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, and fig. 11 is a bottom view.
Fig. 12 to 14 are schematic structural views of a damper according to a third embodiment of the present invention, in which fig. 12 is a front view (sectional view), fig. 13 is a sectional view from E to E of fig. 12, and fig. 14 is a sectional view from F to F of fig. 12.
Detailed Description
Example 1
Referring to fig. 1, the composite spring damper capable of adjusting early stiffness in this example is an energy consumption device for seismic strengthening 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, where 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 composite 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 composite spring 4; the driving component comprises a movable platen 5 which is positioned at the upper end of the composite 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, wherein 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 to 3 in combination with fig. 6, the composite spring 4 in this embodiment is formed by compounding and vulcanizing a cylindrical helical compression spring 4-1 and a rubber spring 4-2 wrapped around the cylindrical helical compression spring 4-1. The outer diameter of the compound 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 the back pressure device comprises two groups of prepressing steel cables, two floating press plates and eight rigging turnbuckles 16; 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 pressure plates are a first floating pressure plate 6 arranged between a movable pressure plate 5 of the driving component and the composite spring 4 and a second floating pressure plate 7 arranged between the second end cover 3 and the composite spring 4, and 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).
Referring to fig. 1, the eight rigging screw buckles 16 are respectively connected in series to the middle of each pre-pressed steel cable, and the connection method is as follows: each pre-pressed steel cable is cut off from the middle, then two rope ends formed by cutting off are tied on connecting rings at two ends of the corresponding rigging screw 16 and are fixed by a steel cable clamp (shown in the figure).
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 compound springs 4 are arranged on the opposite surfaces of the first floating pressing plate 6 and the second floating pressing plate 7, and two ends of each compound spring 4 are respectively embedded in the positioning rings 15 on the first floating pressing plate 6 and the second floating pressing plate 7.
For the purpose of presetting and adjusting the early stiffness, the installation and tensioning method of the two pre-pressed steel cables is as follows: (1) the back pressure device, the driving member, the second end cap 3 and the compound spring 4 in the damper of the present embodiment are assembled as shown in fig. 1 to 7; (2) applying pressure to two ends of the part obtained in the step (1), compressing the composite spring 4, and detecting the distance between the two floating press plates; (3) when the distance between the two floating pressing plates is equal to the length for compressing the composite spring 4 to meet the early stiffness (the length can be calculated according to the characteristic parameters of the composite spring 4 and the early stiffness required to be preset), the rigging screw 16 is adjusted to tension each pre-pressed steel cable, then the pressure applied in the step (2) is removed, and the two sets of pre-pressed steel cables can clamp the composite spring 4 between the first floating pressing plate 6 and the second floating pressing plate 7 all the time. (4) And (3) sleeving a guide sleeve 1, covering a first end cover 2, and finally butting a connecting ring 5-2 and a driving rod 5-1 to obtain the composite spring damper capable of adjusting the early stiffness. If the early rigidity needs to be adjusted, the guide sleeve 1 is detached, and the steps (2) to (4) are repeated.
Referring to fig. 1, the two sets of pre-pressing steel cables respectively pull the two floating press plates to compress the composite spring 4 to provide pre-pressing force for the composite spring, and the pre-pressing force can be adjusted by changing the length of the pre-pressing steel cables, so that the purpose of presetting the stiffness of the composite spring is achieved. When the damper is subjected to an external axial load, the compound spring 4 will not continue to deform, whether the external load is a compressive or tensile force, as long as it is less than the pre-stress. 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 composite spring 4 to generate elastic deformation energy consumption, and if the external load is tension, the two sets of pre-pressing steel cables respectively pull the two floating platens to move relatively to compress the composite spring 4 to generate elastic deformation energy consumption. Because the final deformation is the compression deformation of the same composite spring 4 no matter the dynamic load of the damper is tension or compression, the bidirectional elastic deformation of the damper is necessarily symmetrical.
Example 2
Referring to fig. 8 to 11, the present example differs from example 1 in the following points:
the first set of pre-pressing steel cables 8 and the second set of pre-pressing steel cables 9 are composed of three pre-pressing steel cables. The number of the rigging screw threads 16 is reduced to six, and the rigging screw threads are respectively connected in series with the middle of each prepressing steel cable.
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. 12 to 14, the composite spring damper capable of adjusting the early stiffness in this example is a vibration isolation device (also called a 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 the vibration isolation support, for the convenience of installation, the connecting lug plate arranged on the second end cover 3 is omitted in the embodiment, the second end cover 3 extends outwards and radially from the edge, the connecting bolt holes 17 are uniformly arranged at the edge, and the second end cover 3 is used as a base of the vibration isolation support. 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 18, and the connecting supporting plate 18 is also provided with a connecting bolt hole 17.
2. The first group of prepressing steel cables 8 and the second group of prepressing steel cables 9 are respectively composed of five prepressing steel cables, the number of the rigging screw buckles 16 is increased to ten, and the first group of prepressing steel cables and the second group of prepressing steel cables are respectively connected in series in the middle of each prepressing steel cable.
Other embodiments than the above-described embodiment are the same as embodiment 2.
Claims (5)
1. A composite spring damper capable of adjusting early stiffness 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 composite spring, the outer diameter of the composite spring is smaller than the inner diameter of the guide sleeve, and an annular space is formed between the composite 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, two floating press plates and rigging screw buckles, the number of the rigging screw buckles is the sum of the two groups of prepressing steel cables, and the number of each group of prepressing steel cables is at least three; wherein,
one of the two floating pressure plates is arranged between the movable pressure plate and the composite spring, and the other floating pressure plate is arranged between the second end cover and the composite 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;
the rigging screw buckle is connected in series with the middle part of the prepressing steel cable;
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 for compressing the composite spring to the preset early stiffness.
2. The composite spring damper capable of adjusting the early stiffness according to claim 1, wherein the composite spring damper capable of adjusting the early stiffness is a damper for seismic reinforcement of a building structure.
3. The composite spring damper capable of adjusting the early stiffness as claimed in claim 1, wherein the composite spring damper capable of adjusting the early stiffness is a vertical seismic isolation device for earthquake resistance of a building.
4. The composite spring damper capable of adjusting 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 combined spring damper capable of adjusting early stiffness as claimed in claim 4, wherein the two floating pressure plates are provided with a positioning ring on their opposite surfaces, and the two ends of the combined spring are embedded in the positioning rings.
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| CN113250209B (en) * | 2020-11-11 | 2022-05-10 | 西南交通大学 | Toughness composite buffer for slope flexible protection system and design method thereof |
| CN115217880B (en) * | 2022-07-18 | 2024-06-07 | 郑州天源橡胶有限公司 | Combined rubber joint for improving transverse stability of air spring |
| CN118161907B (en) * | 2024-05-10 | 2024-07-19 | 四川海山宇光建设工程集团有限公司 | Elastic supporting structure and vibrating dewatering screen |
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| CN200943268Y (en) * | 2006-09-11 | 2007-09-05 | 广州大学 | Improved three-dimensional vibration isolation device |
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Effective date of registration: 20191209 Address after: No. 507, Zhongshan North Road, Xiaguan street, Gulou District, Nanjing City, Jiangsu Province Patentee after: Jiang Yifan Address before: 104 6 Building 327, Mingguang Road, Yaohai District, Anhui, Hefei 230011, China Patentee before: Anhui Xinze Technology Co. Ltd. |
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Effective date of registration: 20200623 Address after: 224500 private venture Park, Tongyu Town, Binhai County, Yancheng City, Jiangsu Province Patentee after: Jiangsu new Datong spring Co., Ltd Address before: No. 507, Zhongshan North Road, Xiaguan street, Gulou District, Nanjing City, Jiangsu Province Patentee before: Jiang Yifan |
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Address after: 224500 private enterprise park, Tongyu Town, Binhai County, Yancheng City, Jiangsu Province Patentee after: Jiangsu new Datong Precision Hardware Co.,Ltd. Address before: 224500 private enterprise park, Tongyu Town, Binhai County, Yancheng City, Jiangsu Province Patentee before: Jiangsu new Datong spring Co., Ltd |