CN106351353B - Early rigidity-adjustable spiral spring damper - Google Patents
Early rigidity-adjustable spiral spring damper Download PDFInfo
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- CN106351353B CN106351353B CN201610906757.6A CN201610906757A CN106351353B CN 106351353 B CN106351353 B CN 106351353B CN 201610906757 A CN201610906757 A CN 201610906757A CN 106351353 B CN106351353 B CN 106351353B
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 121
- 239000010959 steel Substances 0.000 claims abstract description 121
- 230000006835 compression Effects 0.000 claims abstract description 59
- 238000007906 compression Methods 0.000 claims abstract description 59
- 238000003825 pressing Methods 0.000 claims abstract description 48
- 238000007667 floating Methods 0.000 claims abstract description 42
- 208000002740 Muscle Rigidity Diseases 0.000 claims abstract description 18
- 230000035939 shock Effects 0.000 claims description 18
- 206010052904 Musculoskeletal stiffness Diseases 0.000 claims description 14
- 238000002955 isolation Methods 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 10
- 210000000078 claw Anatomy 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 230000005489 elastic deformation Effects 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 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
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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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- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
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Abstract
The invention discloses a spiral spring damper with adjustable early rigidity, which is characterized in that a back pressure device is further arranged in a guide sleeve, the back pressure device comprises two groups of prepressing steel cables and two floating pressing plates, the number of the prepressing steel cables is at least three, the two groups of prepressing steel cables are symmetrically distributed in a central hole of a cylindrical spiral compression spring in a straight line state around the axis of the guide sleeve, one end of each group of prepressing steel cables is fixed on the floating pressing plate adjacent to a driving member, and the other end of each group of prepressing steel cables penetrates through the floating pressing plate adjacent to a second end cover and is anchored on the second end cover through a steel cable self-locking tensioning anchorage; one end of the other group of prepressing steel cables is respectively fixed on the floating pressing plate adjacent to the second end cover, and the other end of the other group of prepressing steel cables respectively penetrates through the floating pressing plate adjacent to the driving member and is anchored on the driving member by a steel cable self-locking tensioning anchorage; and tensioning the two groups of prepressing steel cables to clamp the cylindrical spiral compression spring between the two floating pressing plates all the time.
Description
Technical Field
The present invention relates to a shock absorbing device, and more particularly, to a damper using a helical compression spring.
Background
A damper is a shock absorbing device that dissipates energy of motion by providing resistance to motion. The utilization of dampers to dissipate energy and reduce vibration is a traditional technology widely applied to the industries of aerospace, aviation, war industry, guns, automobiles and the like. Since the seventies of the twentieth century, people have gradually applied the energy dissipation and shock absorption technology by using dampers to structural engineering such as buildings, bridges, railways and the like. The spiral spring damper is widely applied to anti-seismic structures of various buildings due to the characteristics of high impact resistance, low cost and good shock absorption effect.
People pursue a comprehensive anti-seismic performance combining 'resistance' and 'consumption' for the design of anti-seismic structures of buildings, particularly high-rise buildings, namely the anti-seismic structures can provide extra additional rigidity for a building main body to resist the action of external loads under the action of weak wind vibration and small earthquakes, the integrity of the main body structure is maintained, the internal damage of the main body structure is avoided, the anti-seismic structures begin to yield and deform under the action of strong wind vibration and large earthquakes, the external energy is dissipated through the damping action of a damper in the anti-seismic structures, the main body structure is prevented from being seriously damaged or even collapsing in strong wind vibration and large earthquakes, and the life and property safety of people is ensured. 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 spring damper cannot meet the requirement of shock resistance, and any spring damper can generate more or less elastic deformation under the action of external load. The performance of the above-mentioned seismic structure of buildings is difficult to achieve.
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 patent application with the publication number of CN 102409777A discloses a structural three-dimensional shock isolation and anti-overturning device, which comprises a laminated rubber shock isolation support and a spring shock isolation support which is arranged at the lower part of the laminated rubber shock isolation support and consists of a spiral compression spring, wherein the spring shock isolation support is mainly used for isolating vertical seismic waves; however, vertical seismic waves are bidirectional, and the spring shock-insulation support in the invention can only be compressed, deformed and consumed energy; the device is therefore unable to isolate the negative going waves that move instantaneously downwards from the earth's surface in an earthquake. In addition, the device still has the rigidity that can't change the attenuator, reaches preset antidetonation intensity, reduces the purpose of shock attenuation cost.
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 plugged into a central hole of a spiral spring, the constraint block and the spring are in interference fit, 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, the spiral bulge is clamped between spring wires, and a section of the spring clamped with the spiral bulge between the spring wires fails. It can be seen that although the spring in the patent application can change the stiffness, the effective working length of the spring is obviously shortened, and the spring can only compress energy consumption and reduce vibration but cannot stretch the energy consumption and reduce vibration. In addition, the rigidity of the spring is changed by changing the effective working length of the spring, the adjusting range is limited by the material and shape of the spring, and the adjusting range is very limited.
Disclosure of Invention
The invention aims to solve the technical problem of providing a spiral spring damper with adjustable early rigidity, which not only keeps the effective working length of a spring, but also can compress and stretch energy dissipation and vibration reduction.
The technical scheme for solving the technical problems is as follows:
a spiral spring damper with adjustable 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; a cylindrical spiral compression spring is coaxially arranged in the guide sleeve, a driving member extends into the guide sleeve from the outer side of the first end cover, the driving member comprises a movable platen and a driving rod, the movable platen is positioned at the head part of the cylindrical spiral compression 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 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 a steel cable self-locking tensioning anchorage device with the sum of the two groups of prepressing steel cables, wherein,
one of the two floating pressure plates is arranged between the movable pressure plate and the cylindrical spiral compression spring, and the other floating pressure plate is arranged between the second end cover and the cylindrical spiral compression spring;
the cable wire auto-lock tensioning ground tackle constitute by first self-centering locking clamp, the second self-centering locking clamp, prevent turning round compression spring and plane bearing, wherein:
A) the first self-centering locking clamp is provided with a connecting seat, the middle part of one end of the connecting seat is provided with an axially extending cylindrical boss, a first conical clamping jaw consisting of 3-5 claw pieces is arranged in the boss along the axial lead, and a tensioning screw sleeve is sleeved on the outer peripheral surface of the boss; the small end of the first conical clamp points to the connecting seat, and the outer peripheral surface of the tensioning screw sleeve is in a regular hexagon shape;
B) the second self-centering locking clamp is provided with a taper sleeve, a second tapered clamping jaw and a hollow bolt which are composed of 3-5 jaw pieces are sequentially arranged in the taper sleeve along the axis, the head of the hollow bolt is opposite to the big end of the second tapered clamping jaw, and the peripheral surface of the taper sleeve is regular hexagon;
C) the plane bearing is composed of a ball-retainer assembly and annular roller paths respectively arranged on the end surfaces of the tensioning screw sleeve opposite to the taper sleeve, wherein the annular roller paths are matched with the balls in the ball-retainer assembly;
D) the second self-centering locking clamp is positioned on the outer side of the head of the tensioning threaded sleeve, and the small head of the second conical clamping jaw and the small head of the first conical clamping jaw point to the same direction; the plane bearing is positioned between the tensioning threaded sleeve and the taper sleeve, and the anti-torsion compression spring is arranged in an inner hole of the tensioning threaded sleeve; after the prepressing steel cable penetrates out from the space between the claw sheets of the first conical clamping jaw through the center hole of the anti-torsion compression spring and the plane bearing and the space between the claw sheets of the second conical clamping jaw, under the tension action of the prepressing steel cable, one end of the anti-torsion compression spring acts on the first conical clamping jaw, and the other end of the anti-torsion compression spring acts on the conical sleeve;
the two groups of prepressing steel cables are symmetrically distributed in the central hole of the cylindrical spiral compression spring 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 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 respectively and is anchored on the second end cover by the steel cable self-locking tensioning anchorage; one end of the other group of prepressing steel cables is respectively fixed on the floating pressing plate adjacent to the second end cover, and the other end of the other group of prepressing steel cables respectively penetrates through the floating pressing plate adjacent to the movable pressing plate and is anchored on the movable pressing plate by the steel cable self-locking tensioning anchorage;
the floating pressing plate is provided with through holes which penetrate through the prepressing steel cable at the positions which penetrate through the prepressing steel cable, and the aperture of each through hole is larger than the diameter of the prepressing steel cable which penetrates through the through hole;
and tensioning the two groups of pre-pressing steel cables to ensure that the distance between the two floating pressure plates is equal to the length of compressing the cylindrical spiral compression spring to preset early stiffness.
In the above scheme, the pre-pressed steel cable may be a steel cable or a pre-stressed steel strand.
According to the early-stage rigidity-adjustable spiral spring damper, one end of the two groups of prepressing steel cables connected with the floating pressure plate can be anchored by a conventional method, and can also be tied and fixed by a U-shaped component similar to a lifting ring screw or bent by a steel bar.
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 spiral compression spring, and the spiral compression spring can generate elastic compression deformation to consume energy, so that one 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 is preset, namely the early stiffness of the damper can be preset, and no circle of the cylindrical helical compression spring fails, namely the effective working length is unchanged, so that the original characteristic parameters of the cylindrical helical compression spring cannot be changed.
(5) The steel cable self-locking tensioning anchor device is adopted to fix the other end of the prepressing steel cable on the movable pressure plate and the second end cover, so that the length of the prepressing steel cable can be adjusted, and the combined action of the anti-torsion compression spring and the first self-centering locking clamp can be utilized to effectively prevent the prepressing steel cable from twisting in the length adjusting process to change the characteristic parameters of the steel cable.
Drawings
Fig. 1 to 6 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 cross-sectional view C-C of fig. 1, fig. 5 is a bottom view, and fig. 6 is an enlarged view of a part i of fig. 1.
Fig. 7 to 11 are schematic structural views of the steel cable self-locking tensioning anchor device in the embodiment shown in fig. 1 to 6, wherein fig. 7 is a front view (sectional view) in which a broken line indicates a pre-stressed steel cable, fig. 8 is a bottom view, fig. 9 is a sectional view taken along line D-D of fig. 7, fig. 10 is a sectional view taken along line E-E of fig. 7, and fig. 11 is a sectional view taken along line F-F of fig. 7.
Fig. 12 to 16 are schematic structural views of a second embodiment of a damper according to the present invention, in which fig. 12 is a front view (cross-sectional view), fig. 13 is a sectional view taken from G to G of fig. 12, fig. 14 is a sectional view taken from H to H of fig. 12, fig. 15 is a top view, and fig. 16 is a bottom view.
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 (cross-sectional view), fig. 18 is a cross-sectional view from I to I of fig. 17, fig. 19 is a cross-sectional view from J to J of fig. 17, fig. 20 is a top view, and fig. 21 is a bottom view.
Detailed Description
Example 1
Referring to fig. 1, the early-stage stiffness-adjustable coil spring damper 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. The guide sleeve 1 is internally provided with a cylindrical spiral compression spring 4 along the axial direction, a driving member extends into the guide sleeve 1 from the center of the first end cover 2 and presses on the cylindrical spiral compression spring 4, wherein the driving member is composed of a movable platen 5 which is positioned at the upper end of the cylindrical spiral compression 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 13, and the connecting ring 5-2 and the driving rod 5-1 are butted together in a threaded connection mode.
Referring to fig. 1 and 5, the second end cap 3 is provided at an outer side thereof with two connecting ear plates 12 integrally connected thereto, and each connecting ear plate 12 is provided with a hinge hole 13.
Referring to fig. 1-6, 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 seven steel cable self-locking tensioning anchors 14; the two groups of pre-pressing steel cables are a first group of pre-pressing steel cables 8 consisting of four pre-pressing steel cables and a second group of pre-pressing steel cables 9 consisting of three pre-pressing steel cables; the two floating pressure plates are a first floating pressure plate 6 arranged between the movable pressure plate 5 of the driving component and the cylindrical spiral compression spring 4 and a second floating pressure plate 7 arranged between the second end cover 3 and the cylindrical spiral compression spring 4; the two floating pressure plates are respectively in movable fit with the inner surface of the guide sleeve 1.
Referring to fig. 7-11, each steel cable self-locking tensioning anchor 14 is composed of a first self-centering locking clamp, a second self-centering locking clamp, an anti-torsion compression spring 14-1 and a planar bearing 14-2, wherein:
the first self-centering locking clamp is provided with a connecting seat 14-3, the edge of the connecting seat 14-3 is provided with a mounting hole 14-12, the middle part of the lower end of the connecting seat is provided with an axially extending cylindrical boss 14-4, the inside of the boss 14-4 is provided with a first taper hole 14-5 along the axial lead, a first tapered clamping jaw 14-7 consisting of 3 claw pieces is arranged in the taper hole, the outer peripheral surface of the boss 14-4 is sleeved with a tensioning screw sleeve 14-6, and the first tapered clamping jaw are in threaded connection; the small end of the first tapered clamp 14-7 points to the connecting seat 14-3, and the outer peripheral surface of the tensioning screw sleeve 14-6 is in a regular hexagon shape;
the second self-centering locking clamp is provided with a taper sleeve 14-8, and a section of second taper hole 14-13 and a section of threaded hole are sequentially arranged in the taper sleeve 14-8 along the axis; the second taper clamping jaw 14-9 consisting of 3 jaw pieces is arranged in the second taper hole 14-13, the threaded hole is internally provided with a hollow bolt 14-10, the head of the hollow bolt 14-10 is opposite to the big end of the second taper clamping jaw 14-9, and the peripheral surface of the taper sleeve 14-8 is in a regular hexagon shape;
the plane bearing 14-2 is composed of a ball-retainer assembly 14-11 and annular raceways which are respectively arranged on the end faces of the tensioning screw sleeve 14-6 opposite to the taper sleeve 14-8, wherein the annular raceways are matched with the balls in the ball-retainer assembly 14-11;
the second self-centering locking clamp is positioned on the outer side of the head of the tensioning screw sleeve 14-6, and the small head of the second conical clamping jaw 14-9 and the small head of the first conical clamping jaw 14-7 are in the same direction; the plane bearing 14-2 is positioned between the tensioning screw sleeve 14-6 and the taper sleeve 14-8, and the anti-torsion compression spring 14-1 is arranged in an inner hole of the tensioning screw sleeve 14-6. After the pre-pressing steel cable penetrates out from the space between the claws of the first conical clamping jaw 14-7 through the central hole of the anti-torsion compression spring 14-1 and the plane bearing 14-2 and the space between the claws of the second conical clamping jaw 14-9, under the tension of the pre-pressing steel cable, one end of the anti-torsion compression spring 14-1 acts on the first conical clamping jaw 14-7, and the other end acts on the taper sleeve 14-8.
Referring to fig. 1 to 6, the two sets of pre-pressed steel cables are respectively and symmetrically distributed in the central hole of the cylindrical helical compression spring 4 in a linear state around the axis of the guide sleeve 1, each pre-pressed steel cable is parallel to the axis of the guide sleeve 1, and the distance from the first set of pre-pressed steel cables 8 to the axis of the guide sleeve 1 is greater than the distance from the second set 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 15, and the upper ends of the first group of prepressing steel cables respectively pass through the first floating pressing plate 6 and are anchored on the movable pressing plate 5 by a steel cable self-locking tensioning anchorage 14; the upper ends of the second group of prepressing steel cables 9 are respectively fixed on the first floating pressing plate 6 by lifting bolts 15, and the lower ends of the second group of prepressing steel cables penetrate through the second floating pressing plate 7 and are anchored on the second end cover 3 by a steel cable self-locking tensioning anchorage 14. 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; on the movable platen 5, a first anchoring hole 5-3 for anchoring the first group of pre-pressed steel wire ropes 8 is formed at the position where each first group of pre-pressed steel wire ropes 8 passes through; 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; and a second anchoring hole 3-1 for anchoring the second group of pre-pressed steel wire ropes 9 is formed in the passing position of each second group of pre-pressed steel wire ropes 9 on the second end cover 3. The method for fixing one end of the prepressing steel cable on the corresponding component by the lifting bolt 15 comprises the following steps: the eye screw 15 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 connecting seat 14-3 of the cable self-locking tension anchor 14 is fixed to the lower surface of the second end cap 3 or the upper surface of the movable platen 5 by screws.
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 to 6 in combination with fig. 7 to 11, in order to achieve the purpose of presetting the early stiffness, the installation and tensioning method of the two sets of pre-pressed steel cables is as follows: (1) firstly, calculating the length of the cylindrical spiral compression spring 4 meeting the early stiffness of the damper according to the early stiffness preset by the damper and the characteristic parameters of the cylindrical spiral compression spring 4; (2) assembling the damper according to the figure 1, and enabling the other end of each prepressing steel cable to penetrate out of central holes of a first conical clamping jaw 14-7, a second conical clamping jaw 14-9 and a hollow bolt 14-10 of a corresponding steel cable self-locking tensioning anchorage 14; then, (3) the rope end of the exposed prepressing steel rope is tied on a traction tensioning machine, and the compression amount (namely the tensioning distance) of the cylindrical spiral compression spring 4 is monitored while the traction tensioning is carried out so as to determine the distance between the two floating pressure plates; when the distance between the two floating pressure plates is equal to the length of the cylindrical spiral compression spring 4 compressed to meet the early rigidity, the second self-centering locking clamp is moved forwards, meanwhile, the tightening screw sleeve 14-6 is adjusted and screwed, so that the plane bearing 14-2 is tightly clamped between the tightening screw sleeve 14-6 and the taper sleeve 14-8, the anti-twist compression spring 14-1 is compressed, the generated tension pushes the first tapered clamping jaw 14-7 to move forwards to clamp the pre-pressed steel cable, and then the hollow bolt 14-10 is screwed to clamp the pre-pressed steel cable in the second tapered clamping jaw 14-9; and finally, removing the traction stretching machine, cutting off the redundant prepressing steel cable, and clamping the cylindrical spiral compression spring 4 between the two floating pressing plates all the time.
Referring to fig. 1 and 7-11, in the construction process or daily maintenance process of installing the damper, if the tension of a certain pre-pressed steel cable is insufficient, the tensioning screw sleeve 14-6 in the steel cable self-locking tensioning anchorage 14 can be screwed to adjust.
Referring to fig. 1, the two groups of pre-pressing steel wire ropes respectively pull the two floating pressing plates to compress the cylindrical spiral compression spring 4 to provide pre-pressing force for the cylindrical spiral compression spring, and the pre-pressing force can be adjusted by adjusting the length of the steel wire ropes, so that the purpose of presetting the rigidity of the steel wire ropes is achieved. When the damper is subjected to an external load in the axial direction, the cylindrical helical compression spring 4 does not continue to deform regardless of whether the external load is a compressive or tensile force as long as it is smaller than the above-mentioned 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 cylindrical helical compression spring 4 to generate elastic deformation energy consumption, and if the external load is tension, the two sets of pre-pressing steel wire ropes respectively pull the two floating platens to move relatively to compress the cylindrical helical compression spring 4 to generate elastic deformation energy consumption. Since the final deformation is the compression deformation of the same cylindrical helical compression spring 4 no matter the dynamic load to which the damper is subjected is tension or compression, the bidirectional elastic deformation of the damper is necessarily symmetrical.
Example 2
Referring to fig. 12 to 16, the early-stage stiffness-adjustable coil spring damper 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 1:
1. as a vibration isolation support, for the convenience of installation, the connecting ear plate provided on the second end cap 3 in example 1 is omitted in this example, the second end cap 3 extends axially downward from the edge and then radially outward, and the edge is uniformly provided with connecting bolt holes 16, and the second end cap 3 is used as a base of the vibration isolation support, wherein the length of the downward axial extension needs to be greater than the height of the steel cable self-locking tensioning anchor 14. The driving rod 5-1 of the driving member is a metal tube extending from the upper surface of the automatic pressing plate 5 to the outside of the guide sleeve 1, the metal tube is fixedly connected with the movable pressing plate 5 through a countersunk head screw, a connecting supporting plate 17 is arranged at the end part of the metal tube positioned outside the guide sleeve 1, and a connecting bolt hole 16 is also arranged on the connecting supporting plate 17. The first end cover 2 is formed by extending the upper end of the guide sleeve 1 inwards.
2. The first group of prepressing steel cables 8 and the second group of prepressing steel cables 9 are respectively composed of three prepressing steel cables; the number of the steel cable self-locking tensioning anchors 14 is six; the distance between the first group of prepressing steel ropes 8 and the axis of the guide sleeve 1 is equal to the distance between the second group of prepressing steel ropes 9 and the axis of the guide sleeve. The steel cable self-locking tensioning anchors 14 on the outer side of the movable platen 5-1 are all arranged in metal pipes forming the driving rod 5-1, and the length of each metal pipe is larger than the height of each steel cable self-locking tensioning anchor 14.
Other embodiments than the above-described embodiment of this example are the same as example 1.
Example 3
Referring to fig. 17 to 21, the present example mainly has the following differences compared with example 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, and the number of the steel cable self-locking tensioning anchors 14 is ten.
Other embodiments than the above-described embodiment are the same as embodiment 2.
Claims (2)
1. A spiral spring damper with adjustable 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; a cylindrical spiral compression spring is coaxially arranged in the guide sleeve, a driving member extends into the guide sleeve from the outer side of the first end cover, the driving member comprises a movable platen and a driving rod, the movable platen is positioned at the head part of the cylindrical spiral compression 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 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 a steel cable self-locking tensioning anchorage device with the sum of the two groups of prepressing steel cables, wherein,
one of the two floating pressure plates is arranged between the driving component and the cylindrical spiral compression spring, and the other floating pressure plate is arranged between the second end cover and the cylindrical spiral compression spring;
the cable wire auto-lock tensioning ground tackle constitute by first self-centering locking clamp, the second self-centering locking clamp, prevent turning round compression spring and plane bearing, wherein:
A) the first self-centering locking clamp is provided with a connecting seat, the middle part of one end of the connecting seat is provided with an axially extending cylindrical boss, a first conical clamping jaw consisting of 3-5 claw pieces is arranged in the boss along the axial lead, and a tensioning screw sleeve is sleeved on the outer peripheral surface of the boss; the small end of the first conical clamping jaw points to the connecting seat, and the outer peripheral surface of the tensioning screw sleeve is in a regular hexagon shape;
B) the second self-centering locking clamp is provided with a taper sleeve, a second tapered clamping jaw and a hollow bolt which are composed of 3-5 jaw pieces are sequentially arranged in the taper sleeve along the axis, the head of the hollow bolt is opposite to the big end of the second tapered clamping jaw, and the peripheral surface of the taper sleeve is regular hexagon;
C) the plane bearing is composed of a ball-retainer assembly and annular roller paths respectively arranged on the end surfaces of the tensioning screw sleeve opposite to the taper sleeve, wherein the annular roller paths are matched with the balls in the ball-retainer assembly;
D) the second self-centering locking clamp is positioned on the outer side of the head of the tensioning threaded sleeve, and the small head of the second conical clamping jaw and the small head of the first conical clamping jaw point to the same direction; the plane bearing is positioned between the tensioning threaded sleeve and the taper sleeve, and the anti-torsion compression spring is arranged in an inner hole of the tensioning threaded sleeve; after the prepressing steel cable penetrates out from the space between the claw sheets of the first conical clamping jaw through the center hole of the anti-torsion compression spring and the plane bearing and the space between the claw sheets of the second conical clamping jaw, under the tension action of the prepressing steel cable, one end of the anti-torsion compression spring acts on the first conical clamping jaw, and the other end of the anti-torsion compression spring acts on the conical sleeve;
the two groups of prepressing steel cables are respectively and symmetrically distributed in the central hole of the cylindrical spiral compression spring in a linear state around the axis of the guide sleeve, one end of each group of prepressing steel cables is respectively fixed on the floating pressing plate adjacent to the driving member, and the other end of each group of prepressing steel cables respectively penetrates through the floating pressing plate adjacent to the second end cover and is anchored on the second end cover by the steel cable self-locking tensioning anchorage; one end of the other group of prepressing steel cables is respectively fixed on the floating pressing plate adjacent to the second end cover, and the other end of the other group of prepressing steel cables respectively penetrates through the floating pressing plate adjacent to the driving member and is anchored on the driving member by the steel cable self-locking tensioning anchorage;
the floating pressing plate is provided with through holes which penetrate through the prepressing steel cable at the positions which penetrate through the prepressing steel cable, and the aperture of each through hole is larger than the diameter of the prepressing steel cable which penetrates through the through hole;
tensioning the two groups of prepressing steel cables to enable the distance between the two floating pressure plates to be equal to the length of compressing the cylindrical spiral compression spring to preset early stiffness;
the spiral spring damper with adjustable early rigidity is a damper for seismic reinforcement of a building structure or a vertical shock isolation device for seismic resistance of a building.
2. The early adjustable rate coil spring damper as claimed in claim 1, wherein said pre-stressed steel cable is a steel wire rope or a pre-stressed steel strand.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610906757.6A CN106351353B (en) | 2016-10-17 | 2016-10-17 | Early rigidity-adjustable spiral spring damper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610906757.6A CN106351353B (en) | 2016-10-17 | 2016-10-17 | Early rigidity-adjustable spiral spring damper |
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| CN107060454B (en) * | 2017-02-21 | 2018-11-02 | 安徽工业大学 | Rod axial laminated rubber steel plate seismic isolation device |
| CN109057490B (en) * | 2017-05-17 | 2020-05-22 | 大连大学 | Support frame of double-torsion anti-instability device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1005745B (en) * | 1987-02-07 | 1989-11-08 | 华东建筑设计院 | Prestressed damping spring vibration-reducing apparatus |
| CN2095901U (en) * | 1991-04-23 | 1992-02-12 | 唐山工程技术学院 | Carbon steel wire anchor |
| US6098970A (en) * | 1997-09-22 | 2000-08-08 | Winston Lowe | Spring breakage safety system |
| CN201136517Y (en) * | 2007-12-18 | 2008-10-22 | 中国北车集团四方车辆研究所 | Bidirectional buffer for pulling-pressing conversion of elastic body |
| US20090191006A1 (en) * | 2008-01-29 | 2009-07-30 | Seegmiller Ben L | Resin Mixing and Cable Tensioning Device and Assembly for Cable Bolts |
| CN103343593B (en) * | 2013-07-25 | 2015-08-12 | 长沙理工大学 | Prestressed tendon anchorage device capable of being freely regulated and controlled at high precision |
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Effective date of registration: 20240708 Address after: No. 8 Dingfang Road, Jiangpai Village Committee, Qianhuang Town, Wujin District, Changzhou City, Jiangsu Province, 213000 Patentee after: Jiangsu Shenghongyun Metal Materials Co.,Ltd. Country or region after: China Address before: 230011 6 104, Mingguang Road, Yaohai District, Hefei, Anhui, China 104 Patentee before: ANHUI XINZE TECHNOLOGY Co.,Ltd. Country or region before: China |