CN115538835B - Self-resetting rotary amplifying friction energy dissipation damper - Google Patents
Self-resetting rotary amplifying friction energy dissipation damper Download PDFInfo
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- CN115538835B CN115538835B CN202211371987.9A CN202211371987A CN115538835B CN 115538835 B CN115538835 B CN 115538835B CN 202211371987 A CN202211371987 A CN 202211371987A CN 115538835 B CN115538835 B CN 115538835B
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 56
- 239000010959 steel Substances 0.000 claims abstract description 56
- 238000005265 energy consumption Methods 0.000 claims abstract description 30
- 230000000694 effects Effects 0.000 claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 4
- 229910001285 shape-memory alloy Inorganic materials 0.000 abstract description 30
- 238000005299 abrasion Methods 0.000 abstract description 5
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- 238000010276 construction Methods 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002783 friction material Substances 0.000 description 4
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- 230000008569 process Effects 0.000 description 3
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- 239000007769 metal material Substances 0.000 description 2
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- 229920000049 Carbon (fiber) Polymers 0.000 description 1
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Classifications
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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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0237—Structural braces with damping devices
Abstract
A self-resetting rotary amplifying friction energy consumption damper belongs to the field of construction. The friction damper comprises an external constraint steel plate, a gear, a sector plate body, a rack, a friction plate, a friction groove, a torsion spring and an SMA disc spring. The invention is based on the lever effect of the meshing gear, can amplify smaller deformation, so that the damper can realize high-efficiency energy consumption under the condition of small shock; meanwhile, due to deformation amplification, the overall energy consumption of the damper is increased, so that the expected friction energy consumption can be realized under lower positive pressure, and the problem of overlarge friction contact surface abrasion caused by higher positive pressure can be solved; the damper adopts an arc friction groove and a Shape Memory Alloy (SMA) disc spring, so that variable friction energy consumption is realized, and the energy consumption capacity of the damper is further improved; the damper is provided with a torsion spring, and can realize the self-resetting function by setting different prestress.
Description
Technical Field
The invention belongs to the field of construction industry.
Background
The structure may vibrate under environmental loads and excessive vibrational response may lead to component fatigue and even structural failure. Therefore, the vibration damper is additionally arranged to absorb/dissipate vibration energy, so that the vibration response of the structure is reduced, and the vibration damper is important to improving the service performance of the structure and ensuring the safety and reliability of the structure. According to the working principle, the structural vibration control can be roughly divided into: passive control, active control, semi-active control, and hybrid control. Among them, the passive control technique is most widely used because of its advantages of being independent of external energy, relatively simple in construction, and the like. The common passive control device mainly comprises: viscous dampers, viscoelastic dampers, metal dampers, and friction dampers. In particular, viscous dampers utilize liquid movement (e.g., orifice jet) to dissipate vibrational energy, and are velocity dependent dampers. The viscoelastic damper is formed by mutually staggered and bonded viscoelastic materials (such as high-elasticity polymers) and constraint steel plates, and the steel plates deform the viscoelastic materials when moving so as to realize energy dissipation, and also belongs to a speed-related damper. The metal damper is a displacement-related damper which consumes energy by using elastoplastic deformation of special metal materials (such as mild steel). The friction damper belongs to a displacement-related damper as well, and is generally composed of two outer constraint steel plates, one inner constraint steel plate and a friction material layer between the two outer constraint steel plates and the one inner constraint steel plate. When the steel plate and the friction material layer slide relatively, kinetic energy can be converted into heat energy, so that the purposes of energy dissipation and vibration reduction are achieved.
Although structural vibration control techniques have been developed for decades, there are still a number of problems with existing vibration damping techniques that remain to be solved:
(1) The viscous damper has the defects of easy leakage, poor durability and the like due to the large pressure in the chamber. In addition, the viscosity of viscous liquid in a high-temperature environment is reduced, and the energy consumption capacity of the damper is affected;
(2) The energy consumption capability of a metal damper is highly dependent on the shaping deformation of the metal material. Under the condition of small shock, the metal damper mainly deforms elastically, and the energy consumption capability is limited;
(3) The traditional viscoelastic damper has limited damping effect, cannot meet the requirement of energy consumption under the condition of large shock and is easy to damage;
(4) Friction dampers dissipate energy through the relative friction between the friction plate and the steel plate, however, at smaller displacements the energy consumption of the friction damper is not significant. In addition, the traditional friction damper is generally larger in positive pressure, larger in abrasion to friction contact surfaces, and free of self-resetting capability, and obvious in residual deformation after earthquake.
Disclosure of Invention
The improvement points of the invention are as follows:
(1) Based on the lever effect of the meshing gears, the small deformation can be amplified, so that the damper can consume energy under the condition of small shock;
(2) The deformation amplification increases the overall energy consumption of the damper, so that the damper can realize the expected friction energy consumption under lower positive pressure, and the problem of overlarge friction contact surface abrasion caused by higher positive pressure can be solved;
(3) The damper adopts an arc friction groove and a Shape Memory Alloy (SMA) disc spring, so that variable friction energy consumption is realized, and the energy consumption capacity of the damper is improved;
(4) The damper is provided with a torsion spring, and the self-resetting function is realized by setting different prestress.
The invention provides a self-resetting rotary amplifying friction damper, which has the following specific technical principle: as shown in fig. 1-5, the gear type friction damper mainly comprises an external constraint steel plate, a gear, a sector plate body, a rack, a friction plate, a friction groove, a torsion spring, an SMA disc spring and the like. The friction damper comprises an upper sector plate 22, an upper gear 23, a rack 25, a lower gear 24 and a lower sector plate 27 in sequence from top to bottom, wherein the rack 25 is positioned in the middle, the upper gear 23 is meshed with an upper meshing part 251 of the rack 25, the lower gear 24 is meshed with a lower meshing part 253 of the rack 25, the upper gear 23 and the upper sector plate 22 are of an integrated structure, and the lower gear 24 and the lower sector plate 27 are of an integrated structure. Two upper friction plates 21 are symmetrically abutted on the front and rear sides of the upper sector plate 22, and two lower friction plates 26 are symmetrically abutted on the front and rear sides of the lower sector plate 27. On the outer side of each friction plate, corresponding friction grooves are abutted, wherein the friction plates and the friction grooves are processed into arc surfaces which are mutually attached. The outer side of the friction groove is connected with an outer constraint steel plate 12, and the friction groove is inlaid on the outer constraint steel plate 12 and fixedly connected with the outer constraint steel plate 12. The SMA disc spring is abutted against the outer side of the outer constraint steel plate 12 and corresponds to the center of the friction groove, and the cushion block is abutted against the outer side of the SMA disc spring. The center of the sector plate body, the friction plate and the cushion block is provided with a bolt hole, the center of the friction groove is provided with an arc-shaped chute, and the sector plate body, the friction plate, the friction groove, the external constraint steel plate, the SMA disc spring and the cushion block are connected together through high-strength bolts in sequence.
The front side and the rear side of the upper gear 23 and the lower gear 24 are respectively symmetrically abutted with the sleeve, one side of the sleeve with a larger opening faces the gear, and the other side with a smaller opening faces away from the gear. Torsion springs are symmetrically connected to the front and rear sides of the upper gear 23 and the lower gear 24 and around the outer side of the sleeve, one end arm of each torsion spring is inserted into a reserved hole of the gear, and the other end arm of each torsion spring is inserted into a reserved hole of the outer clamping plate 47. The inner diameter of the torsion spring is slightly larger than the outer diameter of the sleeve, the outer diameter is slightly smaller than the reserved hole of the outer constraint steel plate 12, and the torsion spring and the sleeve penetrate through the outer constraint steel plate 12 through the reserved hole. The other end arm of the torsion spring is inserted into the reserved hole of the outer clamping plate 47 at the side with smaller sleeve opening and symmetrically abutted against the outer clamping plate 47 respectively. The gear and the outer clamping plate 47 are provided with bolt holes, the gear, the sleeve, the torsion spring and the outer clamping plate are connected together through a rotating shaft in sequence, and the two ends of the rotating shaft are fixed through nuts. Horizontal limit bolts are symmetrically distributed on the left side and the right side of the outer constraint steel plate 12 and on the upper side and the lower side of the rack 25, and are fixed on the outer constraint steel plate 12 through reserved holes of the outer constraint steel plates 12 on the two sides. The anti-tilting limit bolts are symmetrically distributed on the left side and the right side of the outer constraint steel plate 12 and positioned on the front side and the rear side of the rack 25, and are abutted on the front side and the rear side of the rack 25 through reserved holes of the outer constraint steel plate 12 on one side. The center of the rack 25 is provided with a strip-shaped avoiding groove, the centers of the outer constraint steel plates 12 on the front side and the rear side are provided with two bolt holes, the centers of the outer clamping plates 47 on the front side and the rear side are provided with two bolt holes, and the outer clamping plates 47, the outer constraint steel plates 12 and the rack 25 are sequentially connected by fastening bolts through the reserved holes.
When the rack starts to reciprocate under the action of external force, the sector plate body is driven to rotate through the gear, so that the friction plate and the friction groove relatively move, and friction energy consumption is started. The rotation centers of the sector plate body and the gear are the same, but the rotation force arm of the sector plate body is a plurality of times of the gear, so that a lever effect can be realized, the relative displacement of the friction plate is multiplied compared with the horizontal displacement of the rack, and the friction energy consumption of the damper is further increased. Because the damper has an amplifying effect, expected friction energy consumption can be realized under low positive pressure, and the problems of overlarge friction contact surface abrasion and the like caused by larger positive pressure can be avoided, so that the service life and the reliability of the damper are improved. When the friction plate and the friction groove move relatively, the external constraint steel plates at two sides are pushed away, so that the SMA disc spring starts to be extruded, and larger elastic force is generated after the SMA disc spring is compressed. When the friction plate and the friction groove continue to move, the SMA disc spring is continuously compressed, and larger positive pressure is applied to the friction movement, so that the friction force is gradually increased, and the energy consumption is continuously enhanced. However, because the total positive pressure adopted by the damper is smaller, the SMA disc spring cannot provide enough restoring force to enable the friction plate to generate self-resetting, and therefore, the torsion spring is arranged at the rotation center of the gear, so that the friction plate can realize a complete self-resetting function after the external force is eliminated. The self-resetting assembly of the damper consists of a rotating shaft, a torsion spring, an outer clamping plate and a sleeve, wherein one end of the torsion spring is fixed on the sector plate body, and the other end of the torsion spring is fixed on a round hole on the outer clamping plate. In order to ensure that the torsion spring can enable the friction plate to restore to the initial position, different prestress can be applied to the torsion spring through different fixing holes on the outer clamping plate, and the magnitude of the prestress is larger than the dynamic friction force between the friction plate and the friction groove. When an external force is applied, the torsion spring is twisted, so that torsion force is generated; when the external force is eliminated, the torsion spring can work against the friction force, so that the friction plate returns to the initial position, and residual displacement is avoided.
The beneficial effects of the invention are as follows: (1) The sector rotation amplifying friction damper utilizes the lever principle, can amplify smaller deformation, and can generate larger energy consumption under the condition of small deformation;
(2) Because of deformation amplification, the overall energy consumption is increased, so that the damper can realize expected friction energy consumption under lower positive pressure, and the problem of overlarge friction contact surface abrasion caused by higher positive pressure can be solved;
(3) The friction damper is designed into a mode of an arc-shaped groove and an SMA disc spring, so that on one hand, the positive pressure can be changed to meet more actual demands, and on the other hand, the friction energy consumption between the external constraint steel plate and the friction plate can be effectively increased due to the elasticity of the SMA disc spring;
(4) The torsion spring is additionally arranged in the friction damper, so that the energy consumption of the friction damper is increased, and the damper is self-reset.
Drawings
FIG. 1 is a detailed view of a first connection portion of a self-resetting rotary amplifying friction damper
FIG. 2 is a detail view of a second connection portion of the self-resetting rotary amplifying friction damper
FIG. 3 is a detail view of a self-resetting rotary amplifying friction damper spring assembly
FIG. 4 is a detail view of a self-resetting assembly of a self-resetting rotary amplifying friction damper
FIG. 5 is a detailed view of a self-resetting rotary amplifying friction damper guiding and limiting assembly
FIG. 6 is a front view and a side view of a self-resetting rotary amplifying friction damper
FIG. 7 is a top view of a self-resetting rotary amplifying friction damper
In the figure: 1. the first connecting part, the connecting plate 11, the steel plate 12 are externally restrained, the upper friction groove 13, the upper bar-shaped chute 14, the lower friction groove 15 and the lower bar-shaped chute 16; 2. the second connecting part, the upper friction plate 21, the upper sector plate body 22, the upper gear 23, the lower gear 24, the 25 rack, the lower friction plate 26, the lower sector plate body 27, the upper meshing part of the rack 251, the strip-shaped avoidance groove 252 and the lower meshing part of the rack 253; 3. the elastic component comprises an M16 high-strength bolt rod on 31, an SMA disc spring on 32, a cushion block on 33, an M16 nut on 34, an M16 high-strength bolt rod under 35, an M16 nut under 36, a cushion block under 37 and an SMA disc spring under 38; 4. the self-resetting assembly comprises a 41 upper rotating shaft, a 42 upper rotating shaft nut, a 43 lower rotating shaft nut, a 44 lower rotating shaft, a 45 upper sleeve, a 46 upper torsion spring, a 47 outer clamping plate, a 48 lower torsion spring, a 49 lower sleeve, a 4-10 upper torsion spring fixing hole and a 4-11 lower torsion spring fixing hole; 5. guide limit assembly, upper left horizontal limit bolt of 51, lower left horizontal limit bolt of 52, 53 left anti-tilting limit bolt, 54 left fastening bolt, 55 right fastening bolt, 56 right anti-tilting limit bolt, 57 upper right horizontal limit bolt, 58 lower right horizontal limit bolt
Detailed Description
The self-resetting rotary amplifying friction damper comprises a first connecting part 1, a second connecting part 2, an elastic component 3, a self-resetting component 4 and a guiding limiting component 5. Taking the movement of the upper half part of the damper as an example, when an external force drives the two connection points to move away from or approach each other, a relative movement trend is generated between the first connection part 1 and the second connection part 2, and because the rack 25 is meshed with the upper gear 23, when the rack 25 moves, the upper gear 23 is driven to rotate together, so that the upper sector plate 22 is driven to swing leftwards or rightwards, and in the swinging process of the upper sector plate 22, the upper sector plate 22 drives the upper friction plate 21 to start to move, and at the moment, static friction force starts to be applied between the upper friction plate 21 and the upper friction groove 13; when the external force increases to be greater than the sum of the static friction force between the upper friction plate 21 and the upper friction groove 13 and the prestress of the upper torsion spring 46, the upper friction plate 21 and the upper friction groove 13 are forced to move relatively, the protruding portion of the upper friction plate 21 has a tendency to move out of the upper friction groove 13, and as the groove depth of the upper friction groove 13 gradually decreases from the middle portion of the groove to the two ends, the protruding portion of the upper friction plate 21 can gradually push up the outer constraint steel plates 12 on the two sides so that the distance between the two outer constraint steel plates 12 is gradually increased, while under the condition that the distance between the two outer constraint steel plates 12 is increased, the elastic force generated by the upper SMA disc spring 32 in the elastic assembly 3 is gradually increased, and when the elastic force acts on the two outer constraint steel plates 12, the positive pressure of the outer constraint steel plates 12 to the upper friction plate 21 is gradually increased, so that the friction force between the upper friction groove 13 and the upper friction plate 21 is gradually increased, and the required external force is also gradually increased. Along with the mutual friction movement of the upper friction groove 13 and the upper friction plate 21, the kinetic energy generated by the vibration movement is converted into work and converted into friction heat energy, so that the purposes of vibration reduction and energy consumption are achieved. When the external force disappears, the groove depth of the upper friction groove 13 gradually decreases from the middle part of the groove to two ends, so that the protruding part of the upper friction plate 21 can be forced to slide to the middle part of the upper friction groove 13 under the action of the upper torsion spring 46 in the self-resetting component 4, the protruding part of the upper friction plate 21 is attached to the concave part of the upper friction groove 13, and the self-resetting of the friction damper is realized. It should be noted that, under the action of the upper SMA disc spring 32 in the elastic component 3, the friction damper can also realize self-resetting within a certain range, but at the beginning of the design of the damper, a smaller positive pressure is intended to be adopted, so that a larger energy consumption effect is realized. Therefore, the positive pressure applied to the upper SMA disc spring 32 by the elastic member 3 is small before the external force is applied, so that the restoring force provided by the upper SMA disc spring 32 is small after the external force is removed, and it is difficult to ensure that the upper friction plate 21 and the upper friction groove 13 can return to the original position when the external force is removed, so that the damper is further provided with the self-restoring member 4. At the two fixed ends of the outer clamping plate 47, 8 upper torsion spring fixing holes 4-10 are reserved along one circle of the upper rotating shaft 41, when one end of the upper torsion spring 46 is fixed and the other end is rotated and inserted into different upper torsion spring fixing holes 4-10, different prestress can be applied to the upper torsion spring 46, and different actual demands can be met. To ensure that the upper torsion spring 46 is capable of sufficient restoring force, the initial torsion force of the upper torsion spring 46 needs to be set to be greater than the dynamic friction force between the upper friction plate 21 and the upper friction groove 13. Because the prestressing force of the torsion spring is symmetrically applied, even if the prestressing force is large, the damper can be ensured to keep a static state at the beginning of movement. In the second connecting portion 2 of the friction damper, the upper sector plate 22 and the upper gear 23 are designed into an integral structure, the integral structure can be equivalently a lever, a lever fulcrum is a rotation center of the upper gear 23, a radius of the upper gear 23 and the upper sector plate 22 extending by taking the rotation center as a circle center is a force arm, and small rotation displacement between the upper gear 23 and the rack 25 can be amplified, so that the small rotation displacement can enable the upper sector plate 22 to generate large rotation displacement, and the friction motion of the upper friction plate 21 and the upper friction groove 13 is driven to increase energy consumption. The guiding and limiting assembly 5 of the friction damper comprises an upper left horizontal limiting bolt 51, a lower left horizontal limiting bolt 52, a left anti-tilting limiting bolt 53, a left fastening bolt 54, a right fastening bolt 55, a right anti-tilting limiting bolt 56, an upper right horizontal limiting bolt 57 and a lower right horizontal limiting bolt 58, wherein the fastening bolts are respectively arranged in a strip-shaped avoidance groove 252 of the rack 25 at intervals, so that the rack 25 can move along the horizontal direction on one hand, the horizontal movement amplitude of the rack 25 can be limited on the other hand, and the damage failure of the upper gear 23 caused by the overlarge movement amplitude of the rack 25 is avoided. The horizontal limit bolts are respectively positioned on the upper side and the lower side of the two ends of the rack 25, and are mainly used for preventing the rack 25 from tilting in the up-down direction in the horizontal movement process; one end of the anti-tilting bolt is fixed on the outer constraint steel plate 12, and the other end is abutted against the vertical surface of the rack 25, so that the rack 25 is prevented from tilting in the front-rear plane, and the stability and reliability of the damper device are affected. There are 3 different constraints on the outer constraint steel plate 12 of the friction damper, including the upper SMA disc spring 32 constraint of the elastic assembly 3, the outer clamping plate 47 constraint of the self-resetting assembly 4, and the bolt constraint of the guiding limit assembly 5.
In the process of the mutual movement of the upper friction plate 21 and the upper friction groove 13, when the protruding portion of the upper friction plate 21 moves out of the upper friction groove 13, the protruding portion of the upper friction plate 21 gradually pushes up the outer constraint steel plates 12 on both sides. At this time, in the elastic assembly 3, since the diameter of the upper SMA disc spring 32 is larger than the width of the bar-shaped slide groove 14 of the upper friction groove 13, when the outer constraint steel plate 12 moves to the outside in the axial direction of the M16 screw, the upper SMA disc spring 32 is pressed to generate a larger pressure to the outer constraint steel plate 12. In the self-resetting assembly 4, the outer diameter of the upper torsion spring 46 is slightly smaller than the rotation hole of the outer constraint steel plate 12, so that the outer constraint steel plate 12 is not constrained by the upper torsion spring 46 when moving along the axial direction of the upper rotation shaft 41, but moves straight outwards, and is not further constrained by the outer clamping plate 47 until the upper SMA disc spring 32 is damaged. The SMA disc spring 32 of the shape memory alloy is made of a shape memory alloy (shape memory alloys, abbreviated as SMA) composed of two or more metal elements having a shape memory effect by thermoelasticity, martensitic transformation and inversion thereof.
The friction material in the scheme can be replaced by other friction materials, such as chrome-plated steel plates, asbestos fibers, carbon fibers and the like; in the scheme, the friction damper realizes the self-resetting function through the torsion spring, and the spring can be installed in the strip-shaped groove of the straight rack to realize the self-resetting.
Claims (2)
1. A self-resetting rotary amplifying friction damper is characterized in that:
the friction damper comprises an external constraint steel plate, a gear, a sector plate body, a rack, a friction plate, a friction groove, a torsion spring and an SMA disc spring; the gears comprise an upper gear and a lower gear; the sector plate body comprises an upper sector plate body and a lower sector plate body; the friction plate comprises an upper friction plate and a lower friction plate; the middle of the friction damper is provided with an upper sector plate body, an upper gear, a rack, a lower gear and a lower sector plate body in sequence from top to bottom, wherein the rack is positioned in the middle of the friction damper, the upper gear is meshed with an upper meshing part of the rack, the lower gear is meshed with a lower meshing part of the rack, the upper gear and the upper sector plate body are of an integrated structure, and the lower gear and the lower sector plate body are of an integrated structure; two upper friction plates are symmetrically abutted on the front side and the rear side of the upper sector plate body, and two lower friction plates are symmetrically abutted on the front side and the rear side of the lower sector plate body; the outer sides of the friction plates are abutted against the corresponding friction grooves, wherein the friction plates and the friction grooves are processed into arc-shaped surfaces which are mutually attached; the outer side of the friction groove is connected with an outer constraint steel plate, and the friction groove is inlaid on the outer constraint steel plate and fixedly connected with the outer constraint steel plate; the outer side of the outer constraint steel plate is abutted against the SMA disc spring at a position corresponding to the center of the friction groove, and the outer side of the SMA disc spring is abutted against the cushion block; the centers of the sector plate body, the friction plate and the cushion block are provided with bolt holes, the centers of the friction grooves are provided with arc-shaped sliding grooves, and the sector plate body, the friction plate, the friction grooves, the external constraint steel plate, the SMA disc spring and the cushion block are connected together through high-strength bolts in sequence;
the front side and the rear side of the upper gear and the lower gear are respectively symmetrically abutted with the sleeve, the side with the larger opening of the sleeve faces the gear, and the side with the smaller opening faces away from the gear; the torsion springs are symmetrically connected with the outer sides of the sleeves around the front and rear sides of the upper gear and the lower gear, one end force arm of each torsion spring is inserted into a reserved hole of the gear, and the other end force arm is inserted into a reserved hole of the outer clamping plate; the inner diameter of the torsion spring is slightly larger than the outer diameter of the sleeve, the outer diameter of the torsion spring is slightly smaller than the reserved hole of the outer constraint steel plate, and the torsion spring and the sleeve penetrate through the outer constraint steel plate through the reserved hole; the side of the sleeve with smaller opening is respectively and symmetrically abutted with the outer clamping plate; the gear, the sleeve, the torsion spring and the outer clamping plate are sequentially connected together through a rotating shaft, and two ends of the rotating shaft are fixed through nuts; horizontal limit bolts are symmetrically distributed on the left side and the right side of the outer constraint steel plate and are positioned on the upper side and the lower side of the rack, and the horizontal limit bolts are fixed on the outer constraint steel plate through reserved holes of the outer constraint steel plates on the two sides; the anti-tilting limit bolts are symmetrically distributed on the left side and the right side of the outer constraint steel plate and positioned on the front side and the rear side of the rack, and are abutted to the front side and the rear side of the rack through reserved holes of the outer constraint steel plate on one side; the center of the rack is provided with a strip-shaped avoiding groove, the centers of the outer constraint steel plates at the front side and the rear side are provided with two bolt holes, the centers of the outer clamping plates at the front side and the rear side are provided with two bolt holes, and the outer clamping plates, the outer constraint steel plates and the rack are sequentially connected through the reserved holes by fastening bolts;
when the rack starts to reciprocate under the action of external force, the sector plate body is driven to rotate through the gear, so that the friction plate and the friction groove relatively move, and friction energy consumption is started; the rotation centers of the sector plate body and the gear are the same, but the rotation force arm of the sector plate body is a plurality of times of the gear, so that a lever effect can be realized, the relative displacement of the friction plate is multiplied compared with the horizontal displacement of the rack, and the friction energy consumption of the damper is further increased; a torsion spring is arranged at the rotation center of the gear to ensure that the friction plate can realize a complete self-resetting function after external force disappears; when an external force is applied, the torsion spring is twisted, so that torsion force is generated; when the external force disappears, the torsion spring can work against the friction force, so that the friction plate returns to the initial position, and the residual displacement is avoided.
2. A self-resetting rotary amplifying friction damper according to claim 1, wherein:
when the friction plate and the friction groove relatively move, the external constraint steel plates at the two sides are pushed away, so that the SMA disc spring starts to be extruded, and larger elastic force is generated after the SMA disc spring is compressed; when the friction plate and the friction groove continue to move, the SMA disc spring is continuously compressed, and larger positive pressure is applied to the friction movement, so that the friction force is gradually increased, and the energy consumption is continuously enhanced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211371987.9A CN115538835B (en) | 2022-11-03 | 2022-11-03 | Self-resetting rotary amplifying friction energy dissipation damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211371987.9A CN115538835B (en) | 2022-11-03 | 2022-11-03 | Self-resetting rotary amplifying friction energy dissipation damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115538835A CN115538835A (en) | 2022-12-30 |
| CN115538835B true CN115538835B (en) | 2024-01-05 |
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| CN202211371987.9A Active CN115538835B (en) | 2022-11-03 | 2022-11-03 | Self-resetting rotary amplifying friction energy dissipation damper |
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