CN108708472B - Box type SMA-piezoelectric variable friction composite damper - Google Patents
Box type SMA-piezoelectric variable friction composite damper Download PDFInfo
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- CN108708472B CN108708472B CN201810982707.5A CN201810982707A CN108708472B CN 108708472 B CN108708472 B CN 108708472B CN 201810982707 A CN201810982707 A CN 201810982707A CN 108708472 B CN108708472 B CN 108708472B
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- 239000002131 composite material Substances 0.000 title claims abstract description 15
- 239000000919 ceramic Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 9
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 claims description 3
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 230000006870 function Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 description 15
- 230000006835 compression Effects 0.000 description 10
- 238000013016 damping Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 239000006096 absorbing agent Substances 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a box type SMA-piezoelectric variable friction composite damper, wherein a left baffle plate, a left top plate, a sliding block, a right top plate and a right baffle plate are sequentially arranged in an outer box body from left to right, one end of a first pulling and pressing rod is positioned outside a left side wall plate, the other end of the first pulling and pressing rod sequentially penetrates through the left side wall plate, the left baffle plate, the left top plate, a left top ring, the sliding block and the right top ring and then is fixedly connected with the right top plate, the first pulling and pressing rod is fixedly connected with the left top plate, the left top ring and the right top ring, the first pulling and pressing rod is in sliding contact with the left side wall plate and the left baffle plate, and the end part of a second pulling and pressing rod is connected with the left side wall plate; the left top plate is connected with the left side wall plate through a plurality of first SMA wires, the left baffle plate is connected with the right baffle plate through a plurality of second SMA wires, the right top plate is connected with the right side wall plate through a plurality of third SMA wires, and the damper has high energy consumption and self-resetting functions and can be used as a semi-active damper.
Description
Technical Field
The invention belongs to the field of semi-control of vibration of civil engineering structures, and relates to a box type SMA-piezoelectric variable friction composite damper.
Background
The piezoelectric material has a piezoelectric effect, i.e., the ability to generate an electrical potential when the piezoelectric material is subjected to mechanical deformation, known as a positive piezoelectric effect, with which various sensors can be fabricated; when voltage is applied to the piezoelectric friction damper, the piezoelectric material deforms and is called inverse piezoelectric effect, and the piezoelectric friction damper can be manufactured by utilizing the inverse piezoelectric effect of the piezoelectric material.
However, in the design process of the piezoelectric friction damper, in order to make the deformation of the piezoelectric ceramic actuator better and lower to be restrained, a larger initial contact positive pressure is often required to be applied, so that the initial friction force is too large, the starting of the damper is difficult, the energy consumption capability is low, the adjustable damping force is small, and residual displacement usually occurs.
The shape memory alloy is a novel intelligent material, and is widely applied in the fields of biomedicine, mechano-electronics, aerospace and the like due to the unique shape memory, super elasticity, high damping and resistance characteristics. In the field of civil engineering, a passive energy consumption damper suitable for damping of an engineering structure can be developed by utilizing the super elasticity and hysteresis energy consumption characteristics of SMA, but the damper applied to semi-active control of structural vibration is difficult to develop by utilizing the super elasticity and hysteresis properties of SMA alone.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a box type SMA-piezoelectric variable friction composite damper which has high energy consumption and self-resetting function and can be used as a semi-active damper.
In order to achieve the above purpose, the box type SMA-piezoelectric variable friction composite damper comprises an outer box body, a first pulling compression bar, a second pulling compression bar and a sliding block with a piezoelectric ceramic driver;
The outer box body is composed of a left side wall plate, a right side wall plate, a front side wall plate, a rear side wall plate and a lower friction bottom plate, wherein a left baffle plate, a left top plate, a sliding block, a right top plate and a right baffle plate are sequentially arranged in the outer box body from left to right, a left top ring and a right top ring are respectively arranged on the left side and the right side of the sliding block, one end of a first pull pressing rod is positioned outside the left side wall plate, the other end of the first pull pressing rod sequentially penetrates through the left side wall plate, the left baffle plate, the left top ring, the sliding block and the right top ring and then is fixedly connected with the right top plate, the first pull pressing rod is fixedly connected with the left top plate, the left top ring and the right top ring, the first pull pressing rod is in sliding contact with the left side wall plate and the left baffle plate, and the end of a second pull pressing rod is connected with the left side wall plate;
The left top plate is connected with the left side wall plate through a plurality of first SMA wires, the left baffle is connected with the right baffle through a plurality of second SMA wires, the right top plate is connected with the right side wall plate through a plurality of third SMA wires, and in an initial state, the left top plate is contacted with the left baffle, and the right top plate is contacted with the right baffle.
An upper friction cover plate is arranged at the top opening of the outer box body, and an inner hexagon bolt for adjusting the pre-pressure of the upper friction cover plate is arranged on the upper friction cover plate.
The front side wall plate and the rear side wall plate are respectively provided with a first transverse chute and a second transverse chute, the end part of the left baffle plate is positioned in the first transverse chute, and the end part of the right baffle plate is positioned in the second transverse chute.
The sliding block is provided with a plurality of through holes which are vertically communicated, wherein each through hole is internally provided with a piezoelectric ceramic driver, the upper end and the lower end of each piezoelectric ceramic driver are respectively provided with a friction gasket, the friction gaskets at the upper end of each piezoelectric ceramic driver are contacted with an upper friction cover plate, the friction gaskets at the lower end of each piezoelectric ceramic driver are contacted with a lower friction bottom plate, and the piezoelectric ceramic drivers are connected with the external power supply through wires.
A first wire through hole is formed in the side wall of the through hole, a second wire through hole is formed in the side wall of the outer box body, and the wires penetrate through the first wire through hole and the second wire through hole.
The distance between the slide block and the left top plate is the same as the distance between the slide block and the right top plate.
The left side wall plate is provided with a first bolt fastening hole and a first pulling and pressing rod through hole for the first pulling and pressing rod to pass through, the left baffle plate is provided with a first SMA wire through hole, a second bolt fastening hole and a second pulling and pressing rod through hole for the first pulling and pressing rod to pass through, and the left top plate is provided with a first bolt through hole, a second SMA wire through hole and a third pulling and pressing rod through hole for the first pulling and pressing rod to pass through; the sliding block is provided with a third SMA wire through hole and a fourth pulling and pressing rod through hole for the first pulling and pressing rod to pass through; the right top plate is provided with a second bolt through hole and a fourth SMA wire through hole; the right baffle is provided with a third bolt fastening hole and a fifth SMA wire through hole; the right side wall plate is provided with a fourth bolt fastening hole;
The left end of the first SMA wire passes through the first bolt fastening hole and then is fixed on the left side wall plate through the first through hole bolt, and the right end of the first SMA wire passes through the first SMA wire through hole and the second SMA wire through hole and then is fixed on the left top plate through the first clamp;
The left end of the second SMA wire passes through the first bolt through hole and the second bolt fastening hole and is then fixed on the left baffle through the second through hole bolt, and the right end of the second SMA wire passes through the third SMA wire through hole, the second bolt through hole and the third bolt fastening hole and is then fixed on the right baffle through the third through hole bolt;
the left end of the third SMA wire passes through the fifth SMA wire through hole and the fourth SMA wire through hole and then is fixed on the right top plate through the second clamp, and the right end of the third SMA wire passes through the fourth bolt fastening hole and then is fixed on the right side wall plate through a fourth through hole bolt.
The first through hole bolt, the second through hole bolt, the third through hole bolt and the fourth through hole bolt are all capped bolts with central holes along the axis.
The first SMA wire, the second SMA wire and the third SMA wire are austenite nickel-titanium SMA wires with the same materials and the same diameters.
The invention has the following beneficial effects:
When the first pulling and pressing rod is pressed, the first pulling and pressing rod drives the left top plate, the right top plate and the sliding block to move rightwards together, meanwhile, the right top plate pushes the right baffle plate to move rightwards along the second transverse sliding groove, so that the sliding block generates externally controllable friction resistance, meanwhile, the first SMA wire and the second SMA wire are stretched, the principle is basically similar when the first pulling and pressing rod is pulled, when the second pulling and pressing rod is pressed, the second pulling and pressing rod drives the outer box body, the outer box body pushes the left baffle plate, the right top plate and the sliding block to move leftwards, the sliding block generates externally controllable friction resistance, meanwhile, the second SMA wire and the third SMA wire are stretched, and the principle is basically similar when the second pulling and pressing rod is pulled. When the first pulling compression bar and the second pulling compression bar are simultaneously pulled, the first pulling compression bar drives the left top plate, the right top plate and the sliding block to jointly move rightwards, the left top plate pushes the left baffle to move rightwards, the second pulling compression bar drives the outer box body to push the right baffle to move leftwards, so that the sliding block generates external controllable friction resistance, the first SMA wire, the second SMA wire and the third SMA wire are simultaneously pulled to realize energy consumption, and when the first pulling compression bar and the second pulling compression bar are pressed, the principle is basically similar. In addition, after external stress is eliminated, the reset of the whole damper is realized through the reset of the first SMA wire, the second SMA wire and the third SMA wire, and the damper has the characteristics of simple structure, convenient operation, high energy consumption and reset.
Drawings
FIG. 1 is a plan cross-sectional view of the present invention;
FIG. 2 is a longitudinal cross-sectional view of the present invention;
fig. 3 is a side elevation view of a rush to rice busy;
FIG. 4a is a schematic view of the left side wall panel 101 according to the present invention;
FIG. 4b is a schematic view of the right side wall panel 102 according to the present invention;
fig. 5a is a schematic structural view of the left baffle 6;
Fig. 5b is a schematic structural view of the right baffle 7 in the present invention;
fig. 6a is a schematic structural view of the left top board 8 in the present invention;
fig. 6b is a schematic structural view of the right top board 9 in the present invention;
fig. 7 is a schematic view of the structure of the front side wall plate 103 according to the present invention;
FIG. 8 is a side view of the slider 2 of the present invention;
fig. 9 is a schematic structural view of a first through-hole bolt 15 according to the present invention;
fig. 10 is a diagram showing the connection relationship between the first through hole bolt 15 and the first SMA wire 12 in the present invention.
Wherein 1 is the outer box, 2 is the slider, 3 is piezoceramics driver, 4 is first pull rod, 5 is second pull rod through-hole, 6 is left baffle, 7 is right baffle, 8 is left roof, 9 is right roof, 10 is left top ring, 11 is right top ring, 12 is first SMA silk, 13 is second SMA silk, 14 is third SMA silk, 15 is first through-hole bolt, 16 is the through-hole, 17 is first anchor clamps, 18 is first wire through-hole, 19 is second wire through-hole, 20 is first horizontal spout, 21 is second horizontal spout, 22 is hexagon socket head cap screw, 23 is first pull rod through-hole, 24 is first bolt fastening hole, 25 is second pull rod through-hole, 26 is second bolt fastening hole, 27 is first SMA silk through-hole, 28 is third pull rod through-hole, 29 is first bolt through-hole SMA silk, 30 is second silk through-hole, 31 is fourth pull rod through-hole SMA silk, 32 is third SMA silk through-hole, 33 is second bolt through-hole, 34 is fourth through-hole, 35 is fourth SMA silk, 35 is fourth through-hole, 36 is fourth side wall plate, 36 is first side wall plate, 103 is friction plate, 104 is the top plate, and 107 is friction plate, 107 is the bottom plate is, 107.
Detailed Description
The invention is described in further detail below with reference to the attached drawing figures:
As shown in fig. 1 to 10, the box type SMA-piezoelectric variable friction composite damper according to the present invention comprises an outer box body 1, a first pull rod 4, a second pull rod 5, and a slider 2 with a piezoelectric ceramic actuator 3; the outer box body 1 is composed of a left side wall plate 101, a right side wall plate 102, a front side wall plate 103, a rear side wall plate 104 and a lower friction bottom plate 105, wherein a left baffle plate 6, a left top plate 8, a sliding block 2, a right top plate 9 and a right baffle plate 7 are sequentially arranged in the outer box body 1 from left to right, a left top ring 10 and a right top ring 11 are respectively arranged on the left side and the right side of the sliding block 2, one end of a first tension-compression rod 4 is positioned outside the left side wall plate 101, the other end of the first tension-compression rod 4 sequentially penetrates through the left side wall plate 101, the left baffle plate 6, the left top plate 8, the left top ring 10, the sliding block 2 and the right top ring 11 and then is fixedly connected with the right top plate 9, the first tension-compression rod 4 is fixedly connected with the left top plate 8, the left top ring 10 and the right top ring 11, the first tension-compression rod 4 is in sliding contact with the left side wall plate 101 and the left baffle plate 6, and the end of the second tension-compression rod 5 is connected with the left side wall plate 101; the left top plate 8 is connected with the left side wall plate 101 through a plurality of first SMA wires 12, the left baffle 6 is connected with the right baffle 7 through a plurality of second SMA wires 13, the right top plate 9 is connected with the right side wall plate 102 through a plurality of third SMA wires 14, in an initial state, the left top plate 8 is contacted with the left baffle 6, the right top plate 9 is contacted with the right baffle 7, wherein an upper friction cover plate 106 is arranged at the top opening of the outer box body 1, and an inner hexagon bolt 22 for adjusting the pre-pressure of the upper friction cover plate 106 is arranged on the upper friction cover plate 106; the distance between the slider 2 and the left top plate 8 is the same as the distance between the slider 2 and the right top plate 9.
The front wall plate 103 and the rear wall plate 104 are provided with a first lateral chute 20 and a second lateral chute 21, and the end of the left baffle 6 is positioned in the first lateral chute 20 and the end of the right baffle 7 is positioned in the second lateral chute 21.
The invention further comprises an external power supply, a plurality of through holes 16 which are vertically communicated are formed in the sliding block 2, wherein each through hole 16 is internally provided with a piezoelectric ceramic driver 3, the upper end and the lower end of each piezoelectric ceramic driver 3 are respectively provided with a friction pad 107, the friction pads 107 at the upper end of each piezoelectric ceramic driver 3 are contacted with an upper friction cover plate 106, the friction pads 107 at the lower end of each piezoelectric ceramic driver 3 are contacted with a lower friction bottom plate 105, the piezoelectric ceramic drivers 3 are connected with the external power supply through wires, a first wire through hole 18 is formed in the side wall of each through hole 16, a second wire through hole 19 is formed in the side wall of the outer box body 1, and the wires penetrate through the first wire through hole 18 and the second wire through hole 19.
The left side wall plate 101 is provided with a first bolt fastening hole 24 and a first pulling and pressing rod through hole 23 for the first pulling and pressing rod 4 to pass through, the left baffle plate 6 is provided with a first SMA wire through hole 27, a second bolt fastening hole 26 and a second pulling and pressing rod through hole 25 for the first pulling and pressing rod 4 to pass through, and the left top plate 8 is provided with a first bolt through hole 29, a second SMA wire through hole 30 and a third pulling and pressing rod through hole 28 for the first pulling and pressing rod 4 to pass through; the sliding block 2 is provided with a third SMA wire through hole 32 and a fourth pulling and pressing rod through hole 31 for the first pulling and pressing rod 4 to pass through; the right top plate 9 is provided with a second bolt through hole 33 and a fourth SMA wire through hole 34; the right baffle 7 is provided with a third bolt fastening hole 35 and a fifth SMA wire through hole 36; the right side wall plate 102 is provided with a fourth bolt fastening hole 37; the left end of the first SMA wire 12 passes through the first bolt fastening hole 24 and is fixed on the left side wall plate 101 through the first through hole bolt 15, and the right end of the first SMA wire 12 passes through the first SMA wire through hole 27 and the second SMA wire through hole 30 and is fixed on the left top plate 8 through the first clamp 17; the left end of the second SMA wire 13 passes through the first bolt through hole 29 and the second bolt fastening hole 26 and is then fixed on the left baffle plate 6 through a second through hole bolt, and the right end of the second SMA wire 13 passes through the third SMA wire through hole 32, the second bolt through hole 33 and the third bolt fastening hole 35 and is then fixed on the right baffle plate 7 through a third through hole bolt; the left end of the third SMA wire 14 passes through the fifth SMA wire through hole 36 and the fourth SMA wire through hole 34 and is then fixed on the right top plate 9 by the second clamp, and the right end of the third SMA wire 14 passes through the fourth bolt fastening hole 37 and is then fixed on the right side wall plate 102 by the fourth hole bolt.
The first through hole bolt 15, the second through hole bolt, the third through hole bolt and the fourth through hole bolt are all capped bolts with central holes along the axis; the first SMA wire 12, the second SMA wire 13 and the third SMA wire 14 are austenite nickel-titanium SMA wires with the same material and the same diameter.
When the shock absorber is specifically used, the damper can be connected into a building structure through a herringbone support, a cross support or a diagonal support, or is connected with a inhaul cable in some inhaul cable shock absorbing devices to form a semi-active inhaul cable control system, and the shock absorber can also be used in some shock isolation supports to form a composite shock isolation intelligent support. The pre-tightening degree of the through hole bolts is adjusted according to actual requirements when the damper is assembled, so that the initial strain of the first SMA wire 12, the second SMA wire 13 and the third SMA wire 14 is adjusted to be the optimal value. In the using process of the damper, when the first pulling and pressing rod 4 is pressed, the first pulling and pressing rod 4 drives the left top plate 8, the right top plate 9 and the sliding block 2 to move rightwards together, meanwhile, the right top plate 9 pushes the right baffle 7 to move rightwards along the second transverse sliding groove 21, so that the sliding block 2 generates external controllable friction resistance, the first SMA wire 12 and the second SMA wire 13 are stretched, and the third SMA wire 14 is recovered; when the second pulling and pressing rod 5 is pressed, the second pulling and pressing rod 5 drives the outer box body 1, the outer box body 1 pushes the left baffle plate 6, the left baffle plate 6 drives the right baffle plate 7, and further the right top plate 9 and the sliding block 2 are driven to move leftwards, so that the sliding block 2 generates external controllable friction resistance, and the second SMA wire 13 and the third SMA wire 14 are stretched;
When the first pulling and pressing rod 4 is pulled, the first pulling and pressing rod 4 drives the left top plate 8, the right top plate 9 and the sliding block 2 to move leftwards together, meanwhile, the left top plate 8 pushes the left baffle 6 to move leftwards along the first transverse sliding groove 20, so that the sliding block 2 generates external controllable friction resistance, the third SMA wire 14 and the second SMA wire 13 are pulled, and the first SMA wire 12 returns; when the second pulling and pressing rod 5 is pulled, the second pulling and pressing rod 5 drives the outer box body 1, the outer box body 1 pushes the right baffle 7, the right baffle 7 drives the left baffle 6, and then the left top plate 8 and the sliding block 2 are driven to move rightwards, so that the sliding block 2 generates external controllable friction resistance, and the second SMA wire 13 and the first SMA wire 12 are stretched.
When the first pulling and pressing rod 4 and the second pulling and pressing rod 5 are pulled simultaneously, the first pulling and pressing rod 4 drives the left top plate 8, the right top plate 9 and the sliding block 2 to move rightwards together, the left top plate 8 pushes the left baffle 6 to move rightwards, the second pulling and pressing rod 5 drives the outer box body 1, the outer box body 1 pushes the right baffle 7 to move leftwards, and therefore the sliding block 2 generates external controllable friction resistance, and the first SMA wire 12, the second SMA wire 13 and the third SMA wire 14 are pulled simultaneously; when the first pulling and pressing rod 4 and the second pulling and pressing rod 5 are pressed simultaneously, the first pulling and pressing rod 4 drives the left top plate 8, the right top plate 9 and the sliding block 2 to move leftwards together, the right top plate 9 pushes the right baffle 7 to move leftwards, the second pulling and pressing rod 5 drives the outer box body 1, the outer box body 1 pushes the left baffle 6 to move rightwards, and accordingly the sliding block 2 generates external controllable friction resistance, the first SMA wire 12 and the second SMA wire 13 stretch, and the third SMA wire 14 returns.
When the power is on, the external voltage is changed to change the output force of the piezoelectric ceramic driver 3, so that the contact positive pressure between the friction pad 107 and the lower friction bottom plate 105 and the upper friction cover plate 106 is changed, and the friction damping force is further changed; during actual operation, the friction damping force can be actively controlled by embedding a semi-active control algorithm into the singlechip, and the energy consumption of the austenitic SMA wire, namely, the reset function is added, so that the whole damper can be used as a semi-active damper.
When the power is off, the piezoelectric ceramic driver 3 cannot work normally, the friction damping force is the initial friction damping force and cannot be regulated and controlled actively, all SMA wires in the damper can consume energy and reset normally, and the whole damper can be used as a composite passive energy consumption damper.
The invention comprehensively uses two intelligent materials, namely the piezoelectric ceramic and the shape memory alloy, has better damping effect, more stable performance and stronger adaptability, and can be better applied to the field of structural vibration control. By arranging the first tension compression rod 4 and the second tension compression rod 5, the invention can easily realize the connection with an external component device, is convenient to install and has wider application range, and the fastening problem of the austenitic SMA wire is effectively solved.
The first through hole bolt 15, the second through hole bolt, the third through hole bolt and the fourth through hole bolt are cap bolts with central holes along the axis, the corresponding SMA wires penetrate through the central holes and then are wound on the threads, and when in actual operation, the pretightening degree of the SMA wires is adjusted by adjusting the winding positions of the SMA wires.
The above specific embodiments are merely illustrative of the present patent, and not limiting the scope of the present patent, and various modifications and improvements made by those skilled in the art to the technical solution of the present patent without departing from the spirit of the design of the present patent fall within the protection scope defined by the number of claims of the present patent.
Claims (6)
1. The box type SMA-piezoelectric variable friction composite damper is characterized by comprising an outer box body (1), a first pulling and pressing rod (4), a second pulling and pressing rod (5) and a sliding block (2) with a piezoelectric ceramic driver (3);
The outer box body (1) is composed of a left side wall plate (101), a right side wall plate (102), a front side wall plate (103), a rear side wall plate (104) and a lower friction bottom plate (105), wherein a left baffle plate (6), a left top plate (8), a sliding block (2), a right top plate (9) and a right baffle plate (7) are sequentially arranged in the outer box body (1) from left to right, a left top ring (10) and a right top ring (11) are respectively arranged on the left side and the right side of the sliding block (2), one end of a first pulling pressure rod (4) is positioned outside the left side wall plate (101), the other end of the first pulling pressure rod (4) sequentially penetrates through the left side wall plate (101), the left baffle plate (6), the left top plate (8), the left top ring (10), the sliding block (2) and the right top ring (11) and then is fixedly connected with the right top plate (9), the first pulling pressure rod (4) is fixedly connected with the left top plate (8), the left top ring (10) and the right top ring (11), the first pulling pressure rod (4) is in sliding contact with the left side wall plate (101) and the left side wall plate (6), and the second end of the first pulling pressure rod (5) is connected with the right wall plate (102).
The left top plate (8) is connected with the left side wall plate (101) through a plurality of first SMA wires (12), the left baffle plate (6) is connected with the right baffle plate (7) through a plurality of second SMA wires (13), the right top plate (9) is connected with the right side wall plate (102) through a plurality of third SMA wires (14), and in an initial state, the left top plate (8) is contacted with the left baffle plate (6), and the right top plate (9) is contacted with the right baffle plate (7);
An upper friction cover plate (106) is arranged at the top opening of the outer box body (1), wherein an inner hexagon bolt (22) for adjusting the pre-pressure of the upper friction cover plate (106) is arranged on the upper friction cover plate (106);
The piezoelectric ceramic sliding block is characterized by further comprising an external power supply, a plurality of through holes (16) which are vertically communicated are formed in the sliding block (2), piezoelectric ceramic drivers (3) are arranged in the through holes (16), friction gaskets (107) are arranged at the upper end and the lower end of each piezoelectric ceramic driver (3), the friction gaskets (107) at the upper end of each piezoelectric ceramic driver (3) are in contact with an upper friction cover plate (106), the friction gaskets (107) at the lower end of each piezoelectric ceramic driver (3) are in contact with a lower friction bottom plate (105), and the piezoelectric ceramic drivers (3) are connected with the external power supply through wires;
The left side wall plate (101) is provided with a first bolt fastening hole (24) and a first pulling and pressing rod through hole (23) for the first pulling and pressing rod (4) to pass through, the left baffle plate (6) is provided with a first SMA wire through hole (27), a second bolt fastening hole (26) and a second pulling and pressing rod through hole (25) for the first pulling and pressing rod (4) to pass through, and the left top plate (8) is provided with a first bolt through hole (29), a second SMA wire through hole (30) and a third pulling and pressing rod through hole (28) for the first pulling and pressing rod (4) to pass through; the sliding block (2) is provided with a third SMA wire through hole (32) and a fourth pulling and pressing rod through hole (31) for the first pulling and pressing rod (4) to pass through; the right top plate (9) is provided with a second bolt through hole (33) and a fourth SMA wire through hole (34); a third bolt fastening hole (35) and a fifth SMA wire through hole (36) are formed in the right baffle (7); a fourth bolt fastening hole (37) is formed in the right side wall plate (102);
The left end of the first SMA wire (12) passes through the first bolt fastening hole (24) and is fixed on the left side wall plate (101) through the first through hole bolt (15), and the right end of the first SMA wire (12) passes through the first SMA wire through hole (27) and the second SMA wire through hole (30) and is fixed on the left top plate (8) through the first clamp (17);
The left end of the second SMA wire (13) passes through the first bolt through hole (29) and the second bolt fastening hole (26) and is fixed on the left baffle plate (6) through a second through hole bolt, and the right end of the second SMA wire (13) passes through the third SMA wire through hole (32), the second bolt through hole (33) and the third bolt fastening hole (35) and is fixed on the right baffle plate (7) through a third through hole bolt;
The left end of the third SMA wire (14) passes through the fifth SMA wire through hole (36) and the fourth SMA wire through hole (34) and then is fixed on the right top plate (9) through the second clamp, and the right end of the third SMA wire (14) passes through the fourth bolt fastening hole (37) and then is fixed on the right side wall plate (102) through a fourth through hole bolt.
2. The box SMA-piezoelectric friction changing composite damper according to claim 1, characterized in that a first transverse runner (20) and a second transverse runner (21) are provided on both the front side wall plate (103) and the rear side wall plate (104), the end of the left baffle (6) being located in the first transverse runner (20), and the end of the right baffle (7) being located in the second transverse runner (21).
3. The box-type SMA-piezoelectric variable friction composite damper according to claim 1, characterized in that a first wire through hole (18) is formed in a side wall of the through hole (16), a second wire through hole (19) is formed in a side wall of the outer box (1), and the wires pass through the first wire through hole (18) and the second wire through hole (19).
4. The box SMA-piezoelectric friction composite damper according to claim 1, characterized in that the distance between the slider (2) and the left top plate (8) is the same as the distance between the slider (2) and the right top plate (9).
5. The box SMA-piezoelectric friction composite damper according to claim 1, characterized in that the first through-hole bolt (15), the second through-hole bolt, the third through-hole bolt and the fourth through-hole bolt are capped bolts with a central hole along the axis.
6. The box SMA-piezoelectric friction-changing composite damper according to claim 1, characterized in that the first SMA wire (12), the second SMA wire (13) and the third SMA wire (14) are austenitic nickel-titanium SMA wires of the same material and the same diameter.
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| CN201810982707.5A CN108708472B (en) | 2018-08-27 | 2018-08-27 | Box type SMA-piezoelectric variable friction composite damper |
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| CN201810982707.5A CN108708472B (en) | 2018-08-27 | 2018-08-27 | Box type SMA-piezoelectric variable friction composite damper |
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| CN110130515A (en) * | 2019-05-26 | 2019-08-16 | 天津大学 | A kind of SMA silk-frcition damper suitable for large span spatial structure |
| CN110805636B (en) * | 2019-10-16 | 2021-11-05 | 南京航空航天大学 | Annular piezoelectric stack-based damper |
| CN114000605B (en) * | 2021-12-15 | 2023-01-10 | 兰州理工大学 | Composite friction energy consumption variable tension TiNi alloy wire self-resetting damper |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007020050A1 (en) * | 2007-04-27 | 2008-10-30 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device for vibration damping |
| CN105201099A (en) * | 2015-10-26 | 2015-12-30 | 西安建筑科技大学 | SMA piezoelectric friction intelligent mixed damper |
| CN105350679A (en) * | 2015-12-15 | 2016-02-24 | 西安建筑科技大学 | Reset type SMA piezoelectricity-friction mixed damper |
| CN105804266A (en) * | 2016-05-27 | 2016-07-27 | 西安建筑科技大学 | Rod-shaft type piezoelectric-SMA incorporated friction damper |
| CN205399717U (en) * | 2016-03-25 | 2016-07-27 | 大连理工大学 | From plumbous compound energy dissipation damper of shape memory alloy - extrusion type that restores to throne |
| CN206352344U (en) * | 2016-12-30 | 2017-07-25 | 湖南科技学院 | tension and compression type damper based on magnetic control shape memory alloy |
| CN206971866U (en) * | 2017-06-13 | 2018-02-06 | 西京学院 | A kind of spacing reset friction damper |
| CN207211897U (en) * | 2016-11-01 | 2018-04-10 | 燕山大学 | Multi-layer sheet energy-consumption self-resetting formula SMA piezoelectric friction dampers |
| CN108442557A (en) * | 2018-05-21 | 2018-08-24 | 黄淮学院 | A kind of double-slider piezoelectricity SMA composite shock-absorbing devices |
| CN208748868U (en) * | 2018-08-27 | 2019-04-16 | 西安建筑科技大学 | A kind of box SMA- piezoelectricity change friction composite damper |
-
2018
- 2018-08-27 CN CN201810982707.5A patent/CN108708472B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007020050A1 (en) * | 2007-04-27 | 2008-10-30 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device for vibration damping |
| CN105201099A (en) * | 2015-10-26 | 2015-12-30 | 西安建筑科技大学 | SMA piezoelectric friction intelligent mixed damper |
| CN105350679A (en) * | 2015-12-15 | 2016-02-24 | 西安建筑科技大学 | Reset type SMA piezoelectricity-friction mixed damper |
| CN205399717U (en) * | 2016-03-25 | 2016-07-27 | 大连理工大学 | From plumbous compound energy dissipation damper of shape memory alloy - extrusion type that restores to throne |
| CN105804266A (en) * | 2016-05-27 | 2016-07-27 | 西安建筑科技大学 | Rod-shaft type piezoelectric-SMA incorporated friction damper |
| CN207211897U (en) * | 2016-11-01 | 2018-04-10 | 燕山大学 | Multi-layer sheet energy-consumption self-resetting formula SMA piezoelectric friction dampers |
| CN206352344U (en) * | 2016-12-30 | 2017-07-25 | 湖南科技学院 | tension and compression type damper based on magnetic control shape memory alloy |
| CN206971866U (en) * | 2017-06-13 | 2018-02-06 | 西京学院 | A kind of spacing reset friction damper |
| CN108442557A (en) * | 2018-05-21 | 2018-08-24 | 黄淮学院 | A kind of double-slider piezoelectricity SMA composite shock-absorbing devices |
| CN208748868U (en) * | 2018-08-27 | 2019-04-16 | 西安建筑科技大学 | A kind of box SMA- piezoelectricity change friction composite damper |
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