CN111207174B - Displacement amplification type self-resetting damper based on shape memory alloy - Google Patents
Displacement amplification type self-resetting damper based on shape memory alloy Download PDFInfo
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- CN111207174B CN111207174B CN202010199959.8A CN202010199959A CN111207174B CN 111207174 B CN111207174 B CN 111207174B CN 202010199959 A CN202010199959 A CN 202010199959A CN 111207174 B CN111207174 B CN 111207174B
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- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 42
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 29
- 230000003321 amplification Effects 0.000 title claims abstract description 13
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 46
- 239000010959 steel Substances 0.000 claims description 46
- 229910001369 Brass Inorganic materials 0.000 claims description 24
- 239000010951 brass Substances 0.000 claims description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000013016 damping Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 description 7
- 230000035939 shock Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/04—Friction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/02—Materials; Material properties solids
- F16F2224/0258—Shape-memory metals, e.g. Ni-Ti alloys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/0023—Purpose; Design features protective
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention relates to a displacement amplification type self-resetting damper based on a shape memory alloy, which comprises an upper punch rod structure, a self-resetting device, a lower punch rod structure, a displacement amplification device, an overload protection device, a first stand upright plate, a second stand upright plate and a bottom plate; wherein: the upper parts of the first stand plate and the second stand plate are respectively provided with a special-shaped hole, the bottoms of the first stand plate and the second stand plate are fixedly supported on the bottom plate, the upper punch rod structure is positioned at the top of the damper, and the self-resetting device passes through the first stand plate, the upper punch rod structure and the second stand plate and is then clamped on the side surfaces of the first stand plate and the second stand plate; the displacement amplifying device is positioned between the upper punch rod structure and the lower punch rod structure and is respectively connected with the upper punch rod structure and the lower punch rod structure in a toothed manner; overload protection devices are arranged at two ends of the lower punch rod structure. The invention is novel damping equipment and has good application prospect in earthquake-proof fortification areas.
Description
Technical Field
The invention relates to a displacement amplification type self-resetting damper based on a shape memory alloy, and belongs to the field of engineering earthquake resistance.
Background
Dampers are a common component in the engineering anti-seismic field. The traditional damper dissipates the energy of the earthquake input structure by utilizing mechanisms such as friction, viscous damping or metal yielding, thereby realizing the functions of reducing the earthquake response of the structure, protecting the safety of the structure, and the like. However, these dampers cannot eliminate residual deformation of the structure after a major earthquake, which brings great difficulty to repair work of the structure after the earthquake, and causes great economic loss and time cost. In some cases, the repair cost of a structure may even exceed the reconstruction cost of the structure. Therefore, the development of the damper with the post-earthquake self-resetting function has great engineering value. The shape memory alloy is an intelligent material with super-elastic property, has the property of automatically recovering to original state after unloading and accompanied by energy dissipation, and is an ideal material for developing self-resetting dampers.
The prior shape memory alloy damper has the following defects: part of the shape memory alloy is in an ineffective loose state, so that material waste is caused; the deformation of the shape memory alloy is small when in work, and the material is not fully utilized; the damper can only be arranged along a straight line, and cannot adapt to the requirement of angle change; when the shape memory alloy undergoes strong shock, the energy consumption capability of the shape memory alloy is not ideal enough; the damper itself lacks overload protection and is easily damaged when subjected to strong shock.
Disclosure of Invention
The invention aims to solve the problems of the prior self-resetting damper and provides a displacement amplifying type self-resetting damper based on a shape memory alloy.
The invention aims at realizing the displacement amplification type self-resetting damper based on the shape memory alloy, which is characterized by comprising an upper punch rod structure, a self-resetting device, a lower punch rod structure, a displacement amplification device, an overload protection device, a first stand upright plate, a second stand upright plate and a bottom plate;
Wherein: the upper parts of the first stand plate and the second stand plate are respectively provided with a special-shaped hole, the bottoms of the first stand plate and the second stand plate are fixedly supported on the bottom plate, the upper punch rod structure is positioned at the top of the damper, and the self-resetting device penetrates through the first stand plate, the upper punch rod structure and the second stand plate and then is connected to the side surfaces of the first stand plate and the second stand plate; the displacement amplifying device is positioned between the upper punch rod structure and the lower punch rod structure and is respectively connected with the upper punch rod structure and the lower punch rod structure in a toothed manner; the overload protection devices are arranged at two ends of the lower punch rod structure;
The upper punch rod structure comprises an upper hollow round steel pipe, a push block, an upper hollow square steel pipe and an upper rack; wherein: two ends of the upper hollow round steel pipe are welded with a pushing block respectively; two sides of the upper hollow round steel pipe are welded with an upper hollow square steel pipe respectively; an upper rack is welded at the bottom of the upper hollow round steel pipe; the upper guide rod is also arranged, and the two ends of the upper guide rod, which pass through the upper hollow square steel tube, are respectively fixed on the first stand plate and the second stand plate; the upper punch rod structure is erected on the upper guide rod and can freely slide back and forth along the length direction of the upper guide rod.
The self-resetting device comprises a shape memory alloy wire, an anchorage device and an anchorage plate, wherein: the shape memory alloy wires are arranged in the upper hollow round steel pipe in parallel, and two ends of the shape memory alloy wires respectively penetrate through the special-shaped holes on the first stand vertical plate and the second stand vertical plate and then are anchored on the anchor plate through an anchor device; the plane size of the anchoring plate is larger than that of the special-shaped hole, and the anchoring plate can be clamped on the outer sides of the first stand plate and the second stand plate;
The lower punch rod structure comprises a lower hollow round steel pipe, a lower hollow square steel pipe and a lower rack, wherein: three lower hollow square steel pipes are welded at the bottom of the lower hollow round steel pipe, and a lower rack is welded at the top of the lower hollow round steel pipe; the three lower guide rods respectively penetrate through the corresponding lower hollow square steel pipes and then are fixed on the first stand plate and the second stand plate at two ends; the lower punch rod structure is erected on the lower guide rod and can freely slide back and forth along the length direction of the lower guide rod;
The displacement amplifying device comprises a large-diameter gear, a small-diameter gear, a rotating shaft and a rotating shaft support, wherein: the large-diameter gear and the small-diameter gear are welded into a whole and then are erected on a rotating shaft support through a rotating shaft; the rotating shaft is supported and fixed on the bottom plate; the large-diameter gear is in toothed connection with the upper punch rod structure through an upper rack; the small diameter gear is in toothed connection with the lower punch rod structure through a lower rack.
Overload protection device includes friction frame one, friction frame two, brass plate and connection end, wherein: the friction frame I is a special-shaped structure formed by vertically welding a friction plate I, a friction plate II, a friction plate III and a friction plate IV on the end plate I, and a plurality of aligned bolt holes are formed in the friction plate I, the friction plate II, the friction plate III and the friction plate IV; the friction frame II is a special-shaped structure formed by vertically welding a friction plate V and a friction plate VI on the end plate II, and a plurality of aligned hole slots are formed in the friction plate V and the friction plate VI; bolt holes are also formed in the brass plate; the bolt hole is aligned with the hole groove, the width of the hole groove is larger than the diameter of the bolt hole, and the length of the hole groove is larger than the diameter of the bolt hole; a brass plate, a friction plate five and a brass plate are sequentially arranged between the friction plate I and the friction plate II, a first bolt is further arranged, the first bolt is screwed on bolt holes on the friction plate I and the friction plate II and hole grooves on the friction plate five, and a pretightening force is applied by the first bolt to tightly extrude the friction plate I, the friction plate II, the brass plate and the friction plate five to form friction resistance; a copper plate, a friction plate six and a copper plate are sequentially arranged between the friction plate three and the friction plate four, a second bolt is further arranged, the second bolt is screwed on bolt holes on the friction plate three and the friction plate four, and a hole groove on the friction plate six, and a pretightening force is applied by the second bolt to tightly extrude the friction plate three and the friction plate four, the copper plate and the friction plate six to form friction resistance; the outer side of the first end plate is provided with a connecting end head for connecting with a civil engineering structure; the outer side of the second end plate is connected with a lower punch rod structure.
The first stand plate and the second stand plate are vertically welded on the bottom plate.
The bottom plate is provided with a plurality of round holes for bolting and fixing with civil engineering structures.
The upper punch rod structure and the lower punch rod structure can be arranged in parallel, and set inclination angle arrangement can also be formed.
The invention provides a displacement amplifying type self-resetting damper based on shape memory alloy aiming at the defects of the existing self-resetting damper, and the invention has the advantages that (1) all shape memory alloy materials are always in a tensioning state, and no waste is caused; (2) The elongation of the shape memory alloy is increased through the displacement amplifying device, so that the utilization efficiency of materials is improved; (3) The stress direction and the output direction of the damper can be flexibly adjusted, so that the requirements of different angles are met; (4) When the damper is subjected to strong vibration, the overload protection device further enhances the energy consumption capacity of the damper by starting a friction mechanism; (5) When the damper is subjected to strong shock, the overload protection device can inhibit the increase of the internal force of the damper by starting a friction mechanism, so that overload protection is realized on the damper.
The self-resetting energy consumption principle of the invention: when the load is not very large, such as under the condition of small earthquake or medium earthquake, the load pushes the overload protection device and the lower punch rod structure to move to one side at the same time through the connecting end. Simultaneously, the lower rack pushes the small-diameter gear and the large-diameter gear to rotate, and then the upper rack pushes the upper punch rod structure to move to the other side. At the moment, one end of the shape memory alloy wire is fixed on the outer side of the first stand plate or the second stand plate through an anchorage device and cannot move; the other end of the push block pushes the shape memory alloy wire to stretch. During unloading, the shape memory alloy wire automatically recovers the original length by utilizing the self superelasticity and drives the upper punch rod structure, the large-diameter gear, the small-diameter gear, the lower punch rod structure and the load protection device to synchronously and reversely move until the shape memory alloy wire is recovered, so that the self-resetting is realized. Shape memory alloys can spontaneously dissipate energy using the superelastic effect throughout the loading and unloading process, thereby reducing the seismic response of the structure.
Displacement amplification principle: when loading, the elongation of the shape memory alloy wire is n times of the input displacement of the lower punch rod structure due to the action of the displacement amplifying device, and n is equal to the diameter ratio of the large-diameter gear to the small-diameter gear. The memory alloy wire is fully utilized because the elongation of the memory alloy wire is amplified.
Overload protection principle: when the load is large, such as when encountering strong shock, the load overcomes the friction force among the friction frame I, the friction frame II and the brass plate, so that the friction plate V and the friction plate VI slide along the hole groove direction of the friction plate V and the friction plate VI. During this sliding, the friction mechanism plays a role of a structural "fuse", specifically two: (1) The value of the load is always not more than the friction force, so that the increase of the internal force of the damper is restrained; (2) The energy consumption capability of the damper is additionally supplemented by friction work. The two beneficial effects can ensure the safety of the damper and the structure under the condition of large shock. However, the self-resetting effect of the damper is reduced, and complete self-resetting cannot be achieved.
The beneficial effects are that:
(1) When the invention is stressed in both pushing and pulling directions, the shape memory alloy is always in a tension working state, and no waste is generated. In the prior art, only one part of the shape memory alloy is stretched, and the other part of the shape memory alloy cannot play a role because of looseness or no stress, so that waste is caused.
(2) The elongation of the shape memory alloy is increased through the displacement amplifying device, so that the utilization efficiency of the material is improved. The prior art has no displacement amplification function, and the function of the shape memory alloy is difficult to fully play because the deformation amount of the shape memory alloy is small.
(3) The stress direction and the output direction of the damper can be flexibly adjusted, and the damper is suitable for different angle requirements. The lower punch rod structure is a stress component, and the upper punch rod structure is a force-exerting component, so that the lower punch rod structure and the upper punch rod structure can be arranged in parallel or at a certain inclination angle, and can adapt to different engineering requirements. The stress direction and the force direction in the prior art can only be unidirectionally and parallelly arranged.
(4) When the damper is subjected to strong vibration, the main body structure needs stronger energy consumption capability, and the overload protection device can further enhance the energy consumption capability of the damper by starting a friction mechanism.
(5) When strong shock is experienced, the internal force of the main structural member is large, so that the damper and the structural member are prevented from being damaged due to the excessive internal force, and the overload protection device can inhibit the increase of the internal force of the damper by starting a friction mechanism, thereby realizing overload protection.
(6) Easy maintenance and replacement. Because the overload protection device is arranged, other parts except the overload protection device are not damaged in the whole invention. After strong shock, when the overload protection device is reduced in energy consumption capacity due to repeated reciprocating friction, only the bolts (including the first bolts and the second bolts) are detached, and the brass plate in the overload protection device is replaced.
Drawings
FIG. 1 is a schematic elevational view of the present invention;
FIG. 2 is a schematic illustration of the upper punch structure of the present invention;
FIG. 3 is a schematic view of a self-resetting device in accordance with the present invention;
FIG. 4 is a schematic view of the lower punch structure of the present invention;
FIG. 5 is a schematic view of a displacement amplifying device in the present invention;
FIG. 6 is a schematic diagram of an overload protection apparatus in accordance with the present invention;
FIG. 7 is a schematic illustration of a friction frame one in the present invention;
FIG. 8 is a schematic view of a friction frame II in the present invention;
FIG. 9 is a schematic view of a friction plate one of the present invention;
FIG. 10 is a schematic view of a brass plate of the present invention;
FIG. 11 is a schematic view of a friction plate five of the present invention;
FIG. 12 is a schematic view of a first stand bar of the present invention;
FIG. 13 is a schematic view of a base plate of the present invention;
In the figure: an upper punch rod structure, a2 self-resetting device, a3 lower punch rod structure, a 4 displacement amplifying device, a 5 overload protection device, a 6-1 first frame vertical plate, a 6-2 second frame vertical plate, a 7 bottom plate, an 8 upper hollow round steel pipe, a 9 push block, a 10 upper hollow square steel pipe, an 11 upper rack, a 12 upper guide rod, a 13 shape memory alloy wire, a 14 anchor, a 15 anchor plate, a 16 special-shaped hole, a17 lower hollow round steel pipe, a 18 lower hollow square steel pipe, a 19 lower rack, a 20 lower guide rod, a 21 large diameter gear, a 22 small diameter gear, a 23 rotating shaft, a 24 rotating shaft support, a 25 friction frame I, a 26 friction frame II, a 27 brass plate, a 28 connecting end, a 29 friction plate I, a30 friction plate II, a 31 friction plate III, a 32 friction plate IV, a 33 end plate I, a 34 bolt hole, a 35 friction plate IV, a 36 friction plate II, a 37 end plate II and a 38 hole slot.
Detailed Description
The invention is further explained below with reference to the drawings and specific embodiments:
A displacement amplification type self-resetting damper based on a shape memory alloy comprises an upper punch rod structure 1, a self-resetting device 2, a lower punch rod structure 3, a displacement amplification device 4, an overload protection device 5, a first stand upright plate 6-1, a second stand upright plate 6-2 and a bottom plate 7. The upper parts of the first stand plate 6-1 and the second stand plate 6-2 are respectively provided with a special-shaped hole 16, the bottoms of the first stand plate 6-1 and the second stand plate 6-2 are fixedly supported on the bottom plate 7, the upper punch rod structure 1 is positioned at the top of the damper, and the upper punch rod structure 1 penetrates through the first stand plate 6-1, the upper punch rod structure 1 and the second stand plate 6-2 from the resetting device 2 and is then connected to the side surfaces of the first stand plate 6-1 and the second stand plate 6-2; the lower punch rod structure 3 is positioned below the upper punch rod structure 1, and the displacement amplifying device 4 is positioned between the upper punch rod structure 1 and the lower punch rod structure 3 and is respectively meshed with the upper punch rod structure 1 and the lower punch rod structure 3; overload protection devices 5 are arranged at both ends of the lower punch structure 3.
The upper punch rod structure 1 comprises an upper hollow round steel pipe 8, a push block 9, an upper hollow square steel pipe 10 and an upper rack 11; wherein: two ends of the upper hollow round steel pipe 8 are welded with a push block 9 respectively; two sides of the upper hollow round steel pipe 8 are welded with an upper hollow square steel pipe 10 respectively; an upper rack 11 is welded at the bottom of the upper hollow round steel pipe 8; an upper guide rod 12 is also arranged, and the two ends of the upper guide rod 12 passing through the upper hollow square steel tube 10 are respectively fixed on the first stand plate 6-1 and the second stand plate 6-2; the upper punch rod structure 1 is erected on the upper guide rod 12 and can freely slide back and forth along the length direction of the upper guide rod 12.
The self-resetting device 2 consists of a shape memory alloy wire 13, an anchorage device 14 and an anchorage plate 15, wherein: the shape memory alloy wires 13 are arranged in parallel in the upper hollow round steel pipe 8, and the two ends of the shape memory alloy wires respectively pass through the special-shaped holes 16 on the first stand plate 6-1 and the second stand plate 6-2 and are anchored on the anchor plate 15 through the anchor device 14; the plane size of the anchoring plate 15 is larger than that of the special-shaped hole 16, and the anchoring plate can be clamped on the outer sides of the first stand plate 6-1 and the second stand plate 6-2;
The lower punch structure 3 comprises a lower hollow round steel pipe 17, a lower hollow square steel pipe 18 and a lower rack 19, wherein: three lower hollow square steel pipes 18 are welded at the bottom of the lower hollow round steel pipe 17, and a lower rack 19 is welded at the top of the lower hollow round steel pipe 17; three lower guide rods 20 are further arranged, and the two ends of the three lower guide rods 20, which respectively penetrate through the corresponding lower hollow square steel tubes 18, are fixed on the first stand plate 6-1 and the second stand plate 6-2; the lower punch rod structure 3 is erected on the lower guide rod 20 and can freely slide back and forth along the length direction of the lower guide rod 20;
The displacement amplifying device 4 includes a large diameter gear 21, a small diameter gear 22, a rotation shaft 23, and a rotation shaft support 24, wherein: the large diameter gear 21 and the small diameter gear 22 are welded into a whole and then are erected on a rotating shaft support 24 through a rotating shaft 23; the rotating shaft support 24 is fixed on the bottom plate 7; the large-diameter gear 21 is in tooth connection with the upper punch rod structure 1 through an upper rack 11; the small diameter gear 22 is meshed with the lower punch structure 3 through the lower rack 19.
The overload protection device 5 comprises a first friction frame 25, a second friction frame 26, a brass plate 27 and a connecting end 28, wherein: the friction frame I25 is a special-shaped structure formed by vertically welding a friction plate I29, a friction plate II 30, a friction plate III 31 and a friction plate IV 32 on an end plate I33, and a plurality of aligned bolt holes 34 are formed in the friction plate I29, the friction plate II 30, the friction plate III 31 and the friction plate IV 32; the friction frame II 26 is a special-shaped structure formed by vertically welding a friction plate V35 and a friction plate VI 36 on an end plate II 37, and a plurality of aligned hole grooves 38 are formed in the friction plate V35 and the friction plate VI 36; bolt holes 34 are also formed in the brass plate 27; the width of the hole groove 38 is larger than the diameter of the bolt hole 34, and the length of the hole groove 38 is larger than the diameter of the bolt hole 34; the brass plate 27, the friction plate five 35 and the brass plate 27 are sequentially arranged between the friction plate one 29 and the friction plate two 30, and a first bolt is also arranged, and is screwed on the bolt holes 34 on the friction plate one 29 and the friction plate two 30 and the hole grooves 38 on the friction plate five 35, and the friction plate one 29, the friction plate two 30, the brass plate 27 and the friction plate five 35 are tightly extruded and form friction resistance by applying pretightening force through the first bolt; the brass plate 27, the friction plate six 36 and the brass plate 27 are sequentially arranged between the friction plate III 31 and the friction plate IV 32, a second bolt is further arranged, the second bolt is screwed on the bolt holes 34 on the friction plate III 31 and the friction plate IV 32 and the hole grooves 38 on the friction plate six 36, and the friction plate III 31, the friction plate IV 32, the brass plate 27 and the friction plate VI 36 are tightly extruded and form friction resistance by applying pretightening force through the second bolt; the outer side of the first end plate 33 is provided with a connecting end head 28 for connecting with a civil engineering structure; the outer side of the second end plate 37 is connected to the lower punch structure 3.
Further, the first stand plate 6-1 and the second stand plate 6-2 are vertically welded to the bottom plate 7. The bottom plate 7 is provided with a plurality of round holes for bolting and fixing with civil engineering structures. The upper punch structure 1 and the lower punch structure 3 may be arranged in parallel, or may be arranged at a set inclination angle.
Claims (2)
1. The displacement amplification type self-resetting damper based on the shape memory alloy is characterized by comprising an upper punch rod structure (1), a self-resetting device (2), a lower punch rod structure (3), a displacement amplification device (4), an overload protection device (5), a first stand upright plate (6-1), a second stand upright plate (6-2) and a bottom plate (7);
Wherein: the upper parts of the first stand upright plate (6-1) and the second stand upright plate (6-2) are respectively provided with a special-shaped hole (16), the bottoms of the first stand upright plate (6-1) and the second stand upright plate (6-2) are fixedly supported on the bottom plate (7), the upper punch rod structure (1) is positioned at the top of the damper, and the upper punch rod structure (2) penetrates through the first stand upright plate (6-1), the upper punch rod structure (1) and the second stand upright plate (6-2) and then is connected to the side surfaces of the first stand upright plate (6-1) and the second stand upright plate (6-2); the lower punch rod structure (3) is positioned below the upper punch rod structure (1), and the displacement amplifying device (4) is positioned between the upper punch rod structure (1) and the lower punch rod structure (3) and is respectively in tooth connection with the upper punch rod structure (1) and the lower punch rod structure (3); the overload protection devices (5) are arranged at two ends of the lower punch rod structure (3);
The upper punch rod structure (1) comprises an upper hollow round steel pipe (8), a push block (9), an upper hollow square steel pipe (10) and an upper rack (11); wherein: two ends of the upper hollow round steel pipe (8) are welded with a pushing block (9) respectively; two sides of the upper hollow round steel pipe (8) are welded with an upper hollow square steel pipe (10) respectively; an upper rack (11) is welded at the bottom of the upper hollow round steel pipe (8); the upper guide rod (12) is further arranged, and the two ends of the upper guide rod (12) penetrating through the upper hollow square steel tube (10) are respectively fixed on the first stand vertical plate (6-1) and the second stand vertical plate (6-2); the upper punch rod structure (1) is erected on the upper guide rod (12) and can freely slide back and forth along the length direction of the upper guide rod (12);
The self-resetting device (2) comprises a shape memory alloy wire (13), an anchorage device (14) and an anchorage plate (15), wherein: the shape memory alloy wires (13) are arranged in parallel in the upper hollow round steel pipe (8), and two ends of the shape memory alloy wires respectively penetrate through the special-shaped holes (16) on the first stand upright plate (6-1) and the second stand upright plate (6-2) and are anchored on the anchor plate (15) through the anchor device (14); the plane size of the anchoring plate (15) is larger than that of the special-shaped hole (16), and the anchoring plate can be clamped at the outer sides of the first stand plate (6-1) and the second stand plate (6-2);
the lower punch rod structure (3) comprises a lower hollow round steel pipe (17), a lower hollow square steel pipe (18) and a lower rack (19), wherein: three lower hollow square steel pipes (18) are welded at the bottom of the lower hollow round steel pipe (17), and a lower rack (19) is welded at the top of the lower hollow round steel pipe (17); three lower guide rods (20) are further arranged, and the three lower guide rods (20) respectively penetrate through the corresponding lower hollow square steel pipes (18) and then are fixed on the first stand upright plate (6-1) and the second stand upright plate (6-2) at the two ends; the lower punch rod structure (3) is erected on the lower guide rod (20) and can freely slide back and forth along the length direction of the lower guide rod (20);
The displacement amplifying device (4) comprises a large-diameter gear (21), a small-diameter gear (22), a rotating shaft (23) and a rotating shaft support (24), wherein: the large diameter gear (21) and the small diameter gear (22) are welded into a whole and then are erected on a rotating shaft support (24) through a rotating shaft (23); the rotating shaft support (24) is fixed on the bottom plate (7); the large-diameter gear (21) is in tooth connection with the upper punch rod structure (1) through an upper rack (11); the small diameter gear (22) is in tooth connection with the lower punch rod structure (3) through a lower rack (19);
The overload protection device (5) comprises a first friction frame (25), a second friction frame (26), a brass plate (27) and a connecting end (28), wherein: the friction frame I (25) is a special-shaped structure formed by vertically welding the friction plate I (29), the friction plate II (30), the friction plate III (31) and the friction plate IV (32) on the end plate I (33), a plurality of aligned bolt holes (34) are formed in the friction plate I (29), the friction plate II (30), the friction plate III (31) and the friction plate IV (32), and the bolt holes (34) are also formed in the brass plate (27); the friction frame II (26) is of a special-shaped structure formed by vertically welding a friction plate V (35) and a friction plate VI (36) on an end plate II (37), and a plurality of aligned hole grooves (38) are formed in the friction plate V (35) and the friction plate VI (36); the width of the hole groove (38) is larger than the diameter of the bolt hole (34), and the length of the hole groove (38) is larger than the diameter of the bolt hole (34); a brass plate (27), a brass plate five (35) and a brass plate (27) are sequentially arranged between the friction plate I (29) and the friction plate II (30), and a first bolt is further arranged, and is screwed on the friction plate I (29), the brass plate (27), a bolt hole (34) on the friction plate II (30) and a hole groove (38) on the friction plate five (35), and the friction plate I (29), the friction plate II (30), the brass plate (27) and the friction plate five (35) are tightly extruded and form friction resistance by applying pretightening force through the first bolt; a copper plate (27), a copper plate six (36) and a copper plate (27) are sequentially arranged between the third friction plate (31) and the fourth friction plate (32), a second bolt is further arranged, the second bolt is screwed on the third friction plate (31), the copper plate (27), a bolt hole (34) on the fourth friction plate (32) and a hole groove (38) on the sixth friction plate (36), and pretightening force is applied through the second bolt to tightly extrude the third friction plate (31), the fourth friction plate (32), the copper plate (27) and the sixth friction plate (36) to form friction resistance; the outer side of the first end plate (33) is provided with a connecting end (28) for connecting with a civil engineering structure; the outer side of the end plate II (37) is connected with a lower punch rod structure (3);
The first stand plate (6-1) and the second stand plate (6-2) are vertically welded on the bottom plate (7);
the bottom plate (7) is provided with a plurality of round holes for bolting and fixing with civil engineering structures.
2. A shape memory alloy based displacement amplifying type self-healing damper according to claim 1, wherein the upper punch structure (1) and the lower punch structure (3) can be arranged in parallel and also can form a set inclination arrangement.
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| CN112031504B (en) * | 2020-07-30 | 2021-09-28 | 河南理工大学 | Lever type inertia capacity synergistic shape memory alloy self-resetting structure system |
| CN112177185A (en) * | 2020-10-14 | 2021-01-05 | 大连理工大学 | Displacement response amplification type friction energy dissipation damper based on gear transmission |
| CN112459586A (en) * | 2020-11-26 | 2021-03-09 | 北京工业大学 | Displacement amplification type damper |
| CN112502310A (en) * | 2020-12-14 | 2021-03-16 | 扬州大学 | Displacement amplification type self-resetting damper based on pre-pressed disc spring |
| CN113982343B (en) * | 2021-08-13 | 2024-05-24 | 重庆大学 | Novel assembled take SMA to reset buckling restrained brace device |
| CN114922305B (en) * | 2022-06-13 | 2023-09-12 | 北京工业大学 | Small swing transmission amplifying energy consumption resetting damping device |
| CN117985575A (en) * | 2024-02-21 | 2024-05-07 | 中国二十二冶集团有限公司 | Hoisting cable force regulation overload prevention device and hoisting system |
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