CN106567322A - Helical compression spring damper with presettable initial stiffness - Google Patents
Helical compression spring damper with presettable initial stiffness Download PDFInfo
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- CN106567322A CN106567322A CN201610905604.XA CN201610905604A CN106567322A CN 106567322 A CN106567322 A CN 106567322A CN 201610905604 A CN201610905604 A CN 201610905604A CN 106567322 A CN106567322 A CN 106567322A
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- 230000006835 compression Effects 0.000 title claims abstract description 81
- 238000007906 compression Methods 0.000 title claims abstract description 81
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 175
- 239000010959 steel Substances 0.000 claims abstract description 175
- 238000007667 floating Methods 0.000 claims abstract description 52
- 230000000149 penetrating effect Effects 0.000 claims abstract description 13
- 238000002955 isolation Methods 0.000 claims description 16
- 230000002787 reinforcement Effects 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000004804 winding Methods 0.000 abstract 2
- 238000003825 pressing Methods 0.000 description 27
- 238000000034 method Methods 0.000 description 12
- 230000035939 shock Effects 0.000 description 10
- 238000013016 damping Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005489 elastic deformation Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000000806 elastomer Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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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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- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention relates to a helical compression spring damper with the presettable initial stiffness. The helical compression spring damper with the presettable initial stiffness is characterized in that a guide sleeve is further internally provided with a counter pressure device which comprises more than three preloaded wire ropes, wire rope turning components having the same number with the preloaded wire ropes, and a floating counter pressure steel plate, wherein the preloaded wire ropes are distributed in a center hole of a cylindrical helical compression spring in a fold line state, one end of each preloaded wire rope is symmetrically fixed on the floating counter pressure steel plate by winding the axis of the guide sleeve, and the other end of each preloaded wire rope turns back after penetrating and winding the oppose wire rope turning component, and then penetrates the floating counter pressure steel plate alongside the fixation point, on the floating counter pressure steel plate, of the wire rope turning component, to be fixed to a second end cover; and the preloaded wire ropes are tensioned to the tension required for the presettable initial stiffness, so that the helical compression spring damper is always clamped between a drive member and the floating counter pressure steel plate.
Description
Technical Field
The invention relates to a building anti-vibration device, in particular to a damping device of a spiral spring.
Background
Dampers are devices that provide resistance to movement and dissipate the energy of the movement. From the twenty-century and the seventies, the damper is gradually transferred to structural engineering such as buildings, bridges, railways and the like from industries such as aerospace, aviation, war industry, firearms, automobiles and the like. Coil springs have a variable stiffness characteristic in which load and deformation are linearly related, and therefore, coil springs are widely used in devices such as seismic isolation and shock absorption. The spiral springs are classified according to the using method and mainly comprise tension springs and compression springs, wherein cylindrical spiral compression springs are most commonly applied to dampers. However, a particular cylindrical helical compression spring can only operate in compression within its useful operating range. Therefore, existing dampers for resisting wind and earthquakes use at least two cylindrical helical compression springs, or are compounded with other types of dampers (e.g., viscoelastic dampers). However, this method of using a plurality of cylindrical helical compression springs or combining them with other types of dampers creates many negative problems, such as: 1. the damping characteristics of stretching and compression of the damper are asymmetric, so that the shock insulation and absorption effects are influenced; 2. the volume is large, and the installation cannot be carried out in a narrow space; 3. the structure is complex, the production is difficult, and the cost is high; and so on.
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 (two cylindrical coil springs) in the uide bushing respectively on the middle restriction subassembly on the center pin, 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 cylindrical 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. the rigidity (including the tensile rigidity and the compression rigidity) of the two springs cannot be ensured to be equal or even impossible in the process, so that the damping effects are different when the wind directions are different; 3. the 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 cylindrical spiral 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 cylindrical spiral spring, which obviously causes resource waste.
In addition, in earthquake-resistant engineering, the initial stiffness of the damper is also important for resisting wind load, resisting earthquakes with earthquake intensity lower than the designed earthquake intensity and reducing the construction cost. The patent application with publication number CN 102409777a discloses a three-dimensional shock-isolation and anti-overturning device for a structure, which comprises a spring shock-isolation support composed of cylindrical helical compression springs and arranged at the lower part of a laminated rubber shock-isolation support, wherein the support is mainly a three-dimensional shock-isolation and anti-overturning device, but vertical waves of an earthquake are bidirectional, so that the device cannot isolate negative waves which instantaneously move downwards from the earth surface. 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 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. 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.
Disclosure of Invention
The invention aims to solve the technical problem of providing a spiral compression spring damper with preset initial stiffness, which not only keeps the effective working length of a spiral compression spring, but also can compress and stretch energy dissipation and vibration reduction.
The technical scheme for solving the technical problems is as follows:
a helical compression spring damper capable of presetting initial stiffness comprises a guide sleeve, wherein one end of the guide sleeve is provided with a first end cover, the other end of the guide sleeve is provided with a second end cover, and a cylindrical helical compression spring is coaxially arranged inside the guide sleeve; a driving member extending from the center of the first end cap into the guide sleeve and acting on the cylindrical helical compression spring; 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 more than three pre-pressed steel wire ropes, steel wire rope turning elements with the same number as the pre-pressed steel wire ropes and a floating back pressure steel plate, wherein,
the floating back pressure steel plate is arranged between the cylindrical spiral compression spring and the second end cover;
the steel wire rope direction changing element is symmetrically fixed on the driving component around the axis of the guide sleeve;
the prepressing steel wire ropes are distributed in the central hole of the cylindrical spiral compression spring in a broken line state, one end of each prepressing steel wire rope is symmetrically fixed on the floating back pressure steel plate around the axis of the guide sleeve, the other end of each prepressing steel wire rope passes through the opposite steel wire rope turning element and then turns back, and then the prepressing steel wire rope passes through the floating back pressure steel plate beside the fixed point of the prepressing steel wire rope on the floating back pressure steel plate and is fixed on the second end cover;
on the floating back pressure steel plate, a through hole for penetrating the pre-pressed steel wire rope is arranged at the penetrating position of each pre-pressed steel wire rope, and the aperture of the through hole is larger than the diameter of the pre-pressed steel wire rope;
and tensioning the pre-pressed steel wire rope to a tension required by preset initial rigidity, so that the cylindrical spiral compression spring is always clamped between the driving member and the floating back pressure steel plate.
The working principle of the spiral compression spring damper is as follows: when a dynamic load is applied relatively along the axis of the guide sleeve, the driving member compresses the cylindrical helical compression spring downwards; when the dynamic load acts along the axis of the guide sleeve in a reverse direction, the prepressing steel wire rope reversely lifts the floating counter-pressure steel plate through the steel wire rope turning element to compress the cylindrical spiral compression spring. It can be seen that the axial dynamic load, whether acting on the helical compression spring damper in opposition or in opposition, can compress the cylindrical helical compression spring causing it to elastically deform and consume energy.
According to the working principle, the prepressing steel wire rope and the hole wall of the through hole in the floating back pressure steel plate cannot generate friction in the working process, otherwise, the up-and-down movement of the floating back pressure steel plate is interfered, so that the diameter of the through hole is larger than that of the prepressing steel wire rope, and the up-and-down movement of the floating back pressure steel plate is preferably not interfered and influenced.
In the above scheme, the wire rope direction changing element is a common fixed pulley or a hoisting ring-shaped member with a direction changing function similar to that of the common fixed pulley, such as a hoisting ring screw, a U-shaped member and the like.
According to the helical compression spring damper capable of presetting initial stiffness, two ends of a prepressing steel wire rope can be fixed by welding or can be fixedly tied by similar lifting bolts, however, if the two ends are fixedly tied by welding or lifting bolts, the tension preset only by calculating and strictly controlling the length of the prepressing steel wire rope is needed to achieve the purpose of presetting the initial stiffness, and further the purpose of presetting the initial stiffness is achieved. However, in the actual production and debugging process, the purpose of presetting the initial stiffness by adopting the method for controlling the length of the pre-pressed steel wire rope has two major problems, namely, errors are generated in the welding or tying process, and even if the errors generated in the welding or tying process are controlled, the steel wire rope 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 end of the prepressing steel wire rope is fixed on the second end cover by a steel wire rope self-locking anchorage device; the steel wire rope self-locking anchorage device consists of a mounting hole, a clamping jaw and a check bolt, wherein,
the mounting hole is formed in 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 in the guide sleeve, the pointed end points into the guide sleeve, and the threaded hole is positioned at one side outside the guide sleeve;
the clamping jaw is conical and matched with the conical hole, and consists of 3-5 petals, and a clamping hole for clamping and prepressing the steel wire rope is arranged 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 wire rope is arranged in the check bolt 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 the prepressing steel wire rope is fixed on the floating counter pressing plate, and the other end of the prepressing steel wire rope penetrates through the clamping hole and the round hole of the steel wire rope self-locking anchorage device, so that the exposed rope end can be tied on a traction tensioning machine, and tension is monitored by adopting a tension detector while traction tensioning is carried out. When the pre-pressed steel wire rope is tensioned to the tension required by the preset initial rigidity, the anti-loosening bolt is screwed to push the clamping jaw to clamp and lock the pre-pressed steel wire rope, and the pre-pressed steel wire rope cannot loosen even in the vibration process of repeated tensioning → loosening → tensioning → loosening.
The spiral compression spring damper can be widely applied to the fields of machinery and buildings, such as isolation of internal vibration of mechanical equipment, isolation of equipment foundations, seismic reinforcement of building structures, seismic resistance of large buildings and the like.
Compared with the prior art, the spiral compression spring damper with adjustable initial stiffness has the following effects:
(1) external force is applied along the axis, and the cylindrical spiral compression spring can generate elastic compression deformation and consume energy no matter the external force is pressure or tension, so that the defect that the traditional spiral compression spring damper can only compress, deform and consume energy is overcome;
(2) when the dynamic load is greater than the resistance of the damper with preset initial rigidity, the spiral compression spring damper is symmetrical in two-way elastic deformation, so that the compression deformation energy consumption effect is not influenced by the change of the positive direction and the negative direction of the external load, and a convenient condition is provided for the reinforcement design of wind load resistance and the like of a building structure;
(3) the initial rigidity of the whole damper can be changed by only changing the length of the steel wire rope, so that when the damper is used for vertical shock insulation of a building, the seismic intensity can be preset, and the shock insulation cost is obviously reduced;
(4) the two working states of stretching and compressing can be realized only by one cylindrical spiral spring, and the length of the damper is obviously shortened.
(5) The initial stiffness of the damper can be preset by presetting the length of the pre-pressing steel wire rope, and the cylindrical helical compression spring does not lose efficacy once, namely the effective working length is unchanged, and the original characteristic parameters of the cylindrical helical compression spring cannot be changed.
Drawings
FIGS. 1-5 are schematic structural views of an embodiment of a helical compression spring damper according to the present invention
Fig. 1 is a front view (fig. 3C-C rotation section), fig. 2 is a cross-sectional view a-a (without the preload wire rope) of fig. 1, fig. 3 is a cross-sectional view B-B (without the preload wire rope) of fig. 1, fig. 4 is a structure enlarged view of a part i of fig. 1, and fig. 5 is a structure enlarged view of a part ii of fig. 1.
Fig. 6 to 11 are schematic structural views of a second embodiment of the helical compression spring damper according to the present invention, in which fig. 6 is a front view (half section), fig. 7 is a cross-sectional view from D to D of fig. 6 (with the pre-stressed wire rope omitted), fig. 8 is a cross-sectional view from E to E of fig. 6 (with the pre-stressed wire rope omitted), fig. 9 is an enlarged cross-sectional view from F to F of fig. 7, fig. 10 is an enlarged structural view of a part iii of fig. 6, and fig. 11 is an enlarged cross-sectional view from G to G of fig. 10.
Fig. 12 to 16 are schematic structural views of a third embodiment of the helical compression spring damper according to the present invention, in which fig. 12 is a front view (fig. 14J-J rotation section), fig. 13 is a H-H section (pre-stressed wire rope omitted) of fig. 12, fig. 14 is an I-I section (pre-stressed wire rope omitted) of fig. 12, fig. 15 is a structural enlarged view of a part iv of fig. 12, and fig. 16 is a structural enlarged view of a part v of fig. 12.
Detailed Description
Example 1
Referring to fig. 1 to 5, the damper in this embodiment is a vertical seismic isolation device (also called vertical seismic isolation support) for building seismic resistance, and includes a guide sleeve 1, a first end cover 2, a second end cover 3, a cylindrical helical compression spring 4, and a back pressure device.
Referring to fig. 1-3, the guide sleeve 1 is in a circular tube shape, the upper end of the guide sleeve is contracted inwards and radially to form a first end cover 2 with a guide hole in the center, and the lower end of the guide sleeve extends outwards and radially to form a flange 5. The second end cover 3 is disc-shaped, mounting holes 6 are formed in the peripheral edge, and the guide sleeve 1 is fixed in the middle of the upper surface of the guide sleeve through a flange 5 arranged at the lower end of the guide sleeve.
Referring to fig. 1 to 3, the driving member is composed of a movable platen 7 and an upper connecting plate 8, wherein the upper connecting plate 8 is disc-shaped, the edge of the upper connecting plate is provided with a mounting hole 6, the center of the lower end surface extends downwards to form a boss for guiding, the boss extends into the guide sleeve 1 from a guide hole arranged on the first end cover 2, and the boss is fixed with the movable platen 7 by a screw.
Referring to fig. 1 to 3, the cylindrical helical compression spring 4 is provided in the guide sleeve 1, and the movable platen 7 of the driving member is applied to the upper end surface thereof.
Referring to fig. 1-3, the back pressure device is arranged in the guide sleeve 1, and the specific scheme is as follows:
referring to fig. 1 to 5, the back pressure device comprises three pre-pressed steel wire ropes 9, three lifting ring screws 10 serving as steel wire rope turning elements, a floating back pressure steel plate 11 and six other lifting ring screws 10 for fixing the pre-pressed steel wire ropes 9. Wherein,
the floating back pressure steel plate 11 is arranged between the cylindrical spiral compression spring 4 and the second end cover 3;
the three lifting ring screws 10 serving as steel wire rope direction changing elements are symmetrically fixed on the movable platen 7 of the driving component around the axis of the guide sleeve 1;
three lifting ring screws 10 are symmetrically arranged on the floating back pressure steel plate 11 around the axis of the guide sleeve 1, and another three lifting ring screws 10 are correspondingly arranged on the floating back pressure steel plate 11 on the second end cover 3 beside the opposite positions of the three lifting ring screws 10; three pre-pressing steel wire ropes 9 are arranged in a central hole of the cylindrical spiral compression spring 4 in a broken line state, one end of each pre-pressing steel wire rope 9 is tied and fixed on a lifting ring screw 10 arranged on a floating back-pressure steel plate 11, the other end of each pre-pressing steel wire rope 9 bypasses an opposite lifting ring screw 10 serving as a steel wire rope turning element and then turns back, and then the pre-pressing steel wire rope 9 penetrates through the floating back-pressure steel plate 11 from the opposite position of the lifting ring screw 10 arranged on the second end cover 3 and is tied and fixed on the lifting ring screw 10 arranged on the second end cover 3; on the floating back pressure steel plate 11, a through hole 12 penetrating the pre-pressing steel wire rope 9 is arranged at the penetrating position of each pre-pressing steel wire rope 9, and the diameter of the through hole 12 is larger than the diameter of the pre-pressing steel wire rope 9.
Referring to fig. 1 to 3, in order to achieve the purpose of presetting the initial stiffness, the installation and tensioning methods of the three pre-pressed steel wire ropes 9 are as follows: (1) firstly, determining the compression amount of the cylindrical spiral compression spring 4 according to the initial stiffness preset by the damper and the elastic coefficient of the cylindrical spiral compression spring 4, and further calculating the length required by each pre-pressed steel wire rope 9 to meet the initial stiffness of the damper; (2) after connecting the cylindrical spiral compression spring 4, the back pressure device and the movable platen 7 of the driving member according to fig. 1-3, firstly compressing the cylindrical spiral compression spring 4, exposing three lifting ring screws 10 on the floating back pressure steel plate 11 and three through holes 12 on the second end cover 3, repeatedly adjusting to make the actual length of each prepressing steel wire rope 9 equal to the calculated length, then tying the prepressing steel wire rope to the lifting ring screws 10 on the second end cover 3, fixing the prepressing steel wire rope by common steel wire rope clamps (not shown in the figure), and clamping the cylindrical spiral compression spring 4 between the movable platen 7 of the driving member and the floating back pressure steel plate 11 all the time; (3) and (3) placing the components assembled in the step (2) into the guide sleeve 1, fixing the guide sleeve 1 and the second end cover 3 together, and finally fixing the upper connecting plate 8 and the movable platen 7 together to obtain the spiral spring damper with the preset initial stiffness.
Referring to fig. 1-3, because the damper is a vertical shock isolation device in this embodiment, when the pre-pressed steel wire rope 9 is tensioned, the sum of the tensions of the three pre-pressed steel wire ropes 9 is equal to the static load borne by the damper, so that the two-way elastic deformation symmetry of the damper can be ensured.
Referring to fig. 1, a gap 14 larger than the amplitude is provided between the upper connecting plate 8 and the first end cap 2; in order to avoid that during vibration a collision occurs between the movable platen 7 of the driving member and the first end cap 2, a collision avoidance gap 13 is provided between the movable platen 7 and the first end cap 2.
Under ideal conditions, when the vertical waves of an earthquake are transmitted to a building through the shock isolation device, the building should not be displaced. Based on the above, the working principle of the earthquake-proof shock isolation device for buildings in the embodiment is as follows: referring to fig. 1, when the dynamic load generated by the vertical wave of the earthquake overcomes the initial stiffness of the damper, if the dynamic load pushes up the second end cap 3 along the axis of the guide sleeve 1, the reaction force of the movable platen 5 compresses the cylindrical helical compression spring 4 downward, and the second end cap 3 moves up with the ground without the building moving; if the second end cover 3 is pulled down along the axis of the guide sleeve 1 by the dynamic load, the pre-pressing wire rope 9 reversely lifts the floating counter-pressure steel plate 11 by the lifting bolt 10 as a wire rope direction-changing element, the cylindrical helical compression spring 4 is compressed upwards, and the second end cover 3 moves downwards along with the ground but still does not move. Therefore, when the ground vibrates up and down due to the longitudinal seismic wave, the cylindrical spiral compression spring can be compressed to generate elastic deformation so as to consume energy.
Example 2
Referring to fig. 6 to 11, the damper in this example is also a vertical seismic isolation device for earthquake resistance of buildings, and the following improvements are mainly made on the basis of example 1: (1) increasing the number of the pre-pressed steel wire ropes 9 from three to six; (2) replacing the lifting bolt 10 as a steel wire rope turning element with a U-shaped member 15; (3) replacing a lifting ring screw 10 for fixing the other end of the prepressing steel wire rope 9 with a steel wire rope self-locking anchorage device 16; (4) the middle part of the second end cover 3 is thickened and is upwards bulged to form an inverted basin shape, so that a steel wire rope self-locking anchorage device 16 can be conveniently installed; (5) the counter-pressure device is correspondingly changed to:
the back pressure device consists of six pre-pressed steel wire ropes 9, six U-shaped members 15 serving as steel wire rope turning elements, a floating back pressure steel plate 11, six lifting ring screws 10 for fixing one ends of the pre-pressed steel wire ropes 9 and six steel wire rope self-locking anchors 16 for fixing the other ends of the pre-pressed steel wire ropes 9; wherein,
the floating back pressure steel plate 11 is arranged between the cylindrical spiral compression spring 4 and the second end cover 3;
six U-shaped members 15 serving as steel wire rope direction changing elements are symmetrically fixed on the movable pressing plate 7 of the driving member around the axis of the guide sleeve 1; referring to fig. 9, the U-shaped member 15 is formed by bending round steel, and circular holes matched with two side edges of the U-shaped member 15 are arranged at corresponding positions of the movable platen 7 of the driving member, where the U-shaped member 15 is arranged, the U-shaped member 15 is inserted into the circular holes, and the two are welded and fixed together;
the floating back pressure steel plate 11 is symmetrically provided with a plurality of lifting ring screws 10 around the axis of the guide sleeve 1, and the second end cover 3 is correspondingly provided with a plurality of steel wire rope self-locking anchors 16 beside the opposite positions of the plurality of lifting ring screws 10 arranged on the floating back pressure steel plate 11; land root prepressing steel wire ropes 9 are distributed in the central holes of the cylindrical spiral compression springs 4 in a broken line state, one end of each prepressing steel wire rope 9 is fixed on the floating counter-pressure steel plate 11 through a lifting ring screw 10, the other end of each prepressing steel wire rope 9 is folded after passing through an opposite U-shaped component 15 serving as a steel wire rope turning element, then the prepressing steel wire rope 9 passes through the floating counter-pressure steel plate 11 from the opposite position of the lifting ring screw 10 arranged on the second end cover 3, and is fixed on the second end cover 3 through a steel wire rope self-locking anchorage device 16; on the floating back pressure steel plate 11, a through hole 12 penetrating the pre-pressing steel wire rope 9 is arranged at the penetrating position of each pre-pressing steel wire rope 9, and the diameter of the through hole 12 is larger than the diameter of the pre-pressing steel wire rope 9.
Referring to fig. 10 and 11, in the above-mentioned counter-pressure device, the steel wire rope self-locking anchorage 16 is composed of a mounting hole 16-1, a clamping jaw 16-2 and a locking bolt 16-3, wherein the mounting hole 16-1 is arranged on the second end cover 3; the mounting hole 16-1 consists of a section of taper hole and a section of threaded hole, wherein the taper hole is positioned at one side in the guide sleeve 1, the pointed end points to the inside of the guide sleeve 1, and the threaded hole is positioned at one side outside the guide sleeve 1; the clamping jaw 16-2 is conical matched with the taper hole and consists of 3 petals, and a clamping hole for clamping the pre-pressed steel wire rope 9 is formed in the body along the axis; the check bolt 16-3 is matched with the threaded hole, and a round hole with the diameter larger than that of the pre-pressing steel wire rope 9 is arranged in the body along the axis; the clamping jaw 16-2 is arranged in the taper hole, and the anti-loose bolt 16-3 is arranged in the threaded hole.
Connecting the cylindrical spiral compression spring 4, the back pressure device and the movable platen 7 of the driving member according to the figures 6-11, then compressing the cylindrical spiral compression spring 4 to expose six lifting ring screws 10 on the floating back pressure steel plate 11 and six through holes 12 on the second end cover 3, and then penetrating the other end of the corresponding prepressing steel wire rope 9 out of the clamping hole in the corresponding clamping jaw 16-2 and the round hole of the anti-loosening bolt 16-3. Then the rope head of the exposed prepressing steel wire rope 9 is tied on a traction tensioning machine, and the tension of the prepressing steel wire rope 9 is monitored by a tension detector while the traction tensioning is carried out. When the pre-pressing steel wire rope 9 is tensioned to the tension required by the preset initial rigidity, the locking bolt 16-3 is screwed to push the clamping jaw 16-2 to clamp and lock the pre-pressing steel wire rope 9, so that the cylindrical spiral compression spring 4 is always clamped between the floating counter-pressure steel plate 11 and the movable pressure plate 7. And finally, placing the assembled components into the guide sleeve 1, fixing the guide sleeve 1 and the second end cover 3 together, and fixing the upper connecting plate 8 and the movable platen 7 together to obtain the spiral spring damper with the preset initial stiffness.
The other embodiments other than the above-described embodiment are the same as those of embodiment 1.
The working principle of the seismic isolation device for the earthquake resistance of the building in the embodiment is the same as that in the embodiment 1, and the public can analyze the seismic isolation device by referring to the embodiment 1.
Example 3
Referring to fig. 12 to 14, this example is a damper for earthquake-resistant reinforcement of building structures, which includes a guide sleeve 1, a first end cap 2 and a second end cap 3 are respectively fixed at two ends of the guide sleeve 1, a cylindrical helical compression spring 4 is arranged inside the guide sleeve 1, and a driving member extends into the guide sleeve 1 from the center of the first end cap 2 at one end of the guide sleeve and presses on the cylindrical helical compression spring 4; wherein the driving member is composed of a movable platen 7 and a first driving rod 17 connected with the movable platen, and the tail end of the first driving rod 17 is provided with a hinge hole 18.
Referring to fig. 12, a second driving rod 19 is integrally connected to the outside of the second end cap 3, and the end of the second driving rod 19 is also provided with a hinge hole 18.
Referring to fig. 12-16, a back pressure device is arranged in the guide sleeve 1, and the back pressure device is composed of three pre-pressed steel wire ropes 9, three fixed pulleys 20 serving as steel wire rope turning elements, a floating back pressure steel plate 11, three lifting bolts 10 for fixing one end of the pre-pressed steel wire ropes 9, and three steel wire rope self-locking anchors 16 for fixing the other end of the pre-pressed steel wire ropes 9. Wherein,
the floating back pressure steel plate 11 is arranged between the cylindrical spiral compression spring 4 and the second end cover 3, three through holes 12 penetrating through the pre-pressing steel wire rope 9 are arranged on the floating back pressure steel plate, and the aperture of each through hole 12 is larger than the diameter of the pre-pressing steel wire rope 9;
three fixed pulleys 20 as steel wire rope direction changing elements symmetrically fix the lower surface of the movable platen 7 of the driving member in the central hole of the cylindrical spiral compression spring 4 around the axis of the guide sleeve 1; wherein the fixed pulley 20 is hinged on a bracket which is welded on the movable platen 7 of the driving member;
three lifting ring screws 10 are symmetrically arranged on the floating back pressure steel plate 11 around the axis of the guide sleeve 1, and three steel wire rope self-locking anchors 16 are correspondingly arranged on the second end cover 3 beside the positions opposite to the three lifting ring screws 10 arranged on the floating back pressure steel plate 11; three pre-pressing steel wire ropes 9 are all arranged in a central hole of the cylindrical spiral compression spring 4 in a broken line state, one end of each pre-pressing steel wire rope 9 is tied and fixed on a lifting ring screw 10 arranged on a floating counter-pressure steel plate 11, the other end of each pre-pressing steel wire rope 9 passes through a fixed pulley 20 which is used as a steel wire rope turning element and turns back, then the pre-pressing steel wire rope 9 passes through the floating counter-pressure steel plate 11 from the opposite position of the lifting ring screw 10 arranged on the second end cover 3, and is fixed on the second end cover 3 through a steel wire rope self-locking anchorage device; on the floating back pressure steel plate 11, a through hole 12 penetrating the pre-pressing steel wire rope 9 is arranged at the penetrating position of each pre-pressing steel wire rope 9, and the diameter of the through hole 12 is larger than the diameter of the pre-pressing steel wire rope 9.
The steel wire rope self-locking anchorage device 16 in the scheme is completely the same as that in the example 2, the assembling method of the damper is also similar to that in the example 2, and the public can refer to the example 2 for implementation.
Referring to fig. 12, the working principle of the damper for seismic reinforcement of a building structure according to the present embodiment is as follows: when a dynamic load larger than the designed static load is relatively acted on the first driving rod 17 and the second driving rod 19 along the axis of the guide sleeve 1, the movable pressing plate 7 compresses the cylindrical spiral compression spring 4 downwards, and the hinge holes 18 on the first driving rod 17 and the second driving rod 19 relatively move; when a dynamic load larger than a designed static load acts on the first driving rod 17 and the second driving rod 19 along the axis of the guide sleeve 1 in a reverse direction, the prepressing steel wire rope 9 reversely lifts the floating back-pressure steel plate 11 through the fixed pulley 20 to compress the cylindrical helical compression spring 4, and the hinge holes 18 on the first driving rod 17 and the second driving rod 19 reversely move (at this time, the cylindrical helical compression spring 4 is still in a pressed state). It can be seen that the axial dynamic load, whether acting on the helical compression spring damper in opposition or in opposition, can compress the cylindrical helical compression spring 4 causing it to elastically deform and dissipate energy.
Claims (5)
1. A helical compression spring damper capable of presetting initial stiffness comprises a guide sleeve, wherein one end of the guide sleeve is provided with a first end cover, the other end of the guide sleeve is provided with a second end cover, and a cylindrical helical compression spring is coaxially arranged inside the guide sleeve; a driving member extending from the center of the first end cap into the guide sleeve and acting on the cylindrical helical compression spring; 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 more than three pre-pressed steel wire ropes, steel wire rope turning elements with the same number as the pre-pressed steel wire ropes and a floating back pressure steel plate, wherein,
the floating back pressure steel plate is arranged between the cylindrical spiral compression spring and the second end cover;
the steel wire rope direction changing element is symmetrically fixed on the driving component around the axis of the guide sleeve;
the prepressing steel wire ropes are distributed in the central hole of the cylindrical spiral compression spring in a broken line state, one end of each prepressing steel wire rope is symmetrically fixed on the floating back pressure steel plate around the axis of the guide sleeve, the other end of each prepressing steel wire rope passes through the opposite steel wire rope turning element and then turns back, and then the prepressing steel wire rope passes through the floating back pressure steel plate beside the fixed point of the prepressing steel wire rope on the floating back pressure steel plate and is fixed on the second end cover;
on the floating back pressure steel plate, a through hole for penetrating the pre-pressed steel wire rope is arranged at the penetrating position of each pre-pressed steel wire rope, and the aperture of the through hole is larger than the diameter of the pre-pressed steel wire rope;
and tensioning the pre-pressed steel wire rope to a tension required by preset initial rigidity, so that the cylindrical spiral compression spring is always clamped between the driving member and the floating back pressure steel plate.
2. A predefinable rate helical compression spring damper as claimed in claim 1, wherein the helical compression spring damper is a damper for seismic reinforcement of building structures.
3. A predefinable rate helical compression spring damper as claimed in claim 1, wherein the helical compression spring damper is a vertical seismic isolation device for seismic resistance of a building.
4. The helical compression spring damper with a preset initial stiffness as claimed in claim 1, 2 or 3, wherein the other end of the pre-pressed steel wire rope is fixed on the second end cap by a steel wire rope self-locking anchorage; the steel wire rope self-locking anchorage device consists of a mounting hole, a clamping jaw and a check bolt, wherein,
the mounting hole is formed in 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 in the guide sleeve, the pointed end points into the guide sleeve, and the threaded hole is positioned at one side outside the guide sleeve;
the clamping jaw is conical and matched with the conical hole, and consists of 3-5 petals, and a clamping hole for clamping and prepressing the steel wire rope is arranged 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 wire rope is arranged in the check bolt along the axis;
the clamping jaw is installed in the taper hole, and the anti-loosening bolt is installed in the threaded hole.
5. The helical compression spring damper with a preset initial stiffness as claimed in claim 4, wherein the wire rope direction changing element is a fixed pulley, an eye screw or a U-shaped member.
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| CN201610905604.XA CN106567322B (en) | 2016-10-17 | 2016-10-17 | A kind of spiral compression spring damper of predeterminable initial stiffness |
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| CN201610905604.XA CN106567322B (en) | 2016-10-17 | 2016-10-17 | A kind of spiral compression spring damper of predeterminable initial stiffness |
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| CN106567322A true CN106567322A (en) | 2017-04-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110937535A (en) * | 2019-11-15 | 2020-03-31 | 兰州万里航空机电有限责任公司 | Steel wire rope tension regulator for umbrella belt recovery electric equipment |
| CN113789879A (en) * | 2021-09-07 | 2021-12-14 | 湖南省潇振工程科技有限公司 | Pulley type tuned mass eddy current damper |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08105144A (en) * | 1994-10-04 | 1996-04-23 | Tokkyo Kiki Kk | Anchor device for floating slab and construction of floating slab |
| CN101029538A (en) * | 2007-04-06 | 2007-09-05 | 北京工业大学 | Three-way shock-absorbing stand with variable rigidity and damping |
| CN200943268Y (en) * | 2006-09-11 | 2007-09-05 | 广州大学 | Improved tri-dimensional shock insulation device |
| US7757441B1 (en) * | 2002-10-25 | 2010-07-20 | Unisorb, Inc. | Apparatus for isolating and leveling a machine foundation |
| CN202039470U (en) * | 2011-04-24 | 2011-11-16 | 广州大学 | Three-dimensional shock isolating and absorbing device |
-
2016
- 2016-10-17 CN CN201610905604.XA patent/CN106567322B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08105144A (en) * | 1994-10-04 | 1996-04-23 | Tokkyo Kiki Kk | Anchor device for floating slab and construction of floating slab |
| US7757441B1 (en) * | 2002-10-25 | 2010-07-20 | Unisorb, Inc. | Apparatus for isolating and leveling a machine foundation |
| CN200943268Y (en) * | 2006-09-11 | 2007-09-05 | 广州大学 | Improved tri-dimensional shock insulation device |
| CN101029538A (en) * | 2007-04-06 | 2007-09-05 | 北京工业大学 | Three-way shock-absorbing stand with variable rigidity and damping |
| CN202039470U (en) * | 2011-04-24 | 2011-11-16 | 广州大学 | Three-dimensional shock isolating and absorbing device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110937535A (en) * | 2019-11-15 | 2020-03-31 | 兰州万里航空机电有限责任公司 | Steel wire rope tension regulator for umbrella belt recovery electric equipment |
| CN113789879A (en) * | 2021-09-07 | 2021-12-14 | 湖南省潇振工程科技有限公司 | Pulley type tuned mass eddy current damper |
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| CN106567322B (en) | 2018-03-13 |
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Denomination of invention: Helical compression spring damper with presettable initial stiffness Effective date of registration: 20180912 Granted publication date: 20180313 Pledgee: Bank of Nanjing, Limited by Share Ltd, Nanjing branch Pledgor: NANJING DADE DAMPING TECHNOLOGY CO., LTD. Registration number: 2018320000178 |