CN103255851B - Shape memory alloy friction composite vibration isolator - Google Patents
Shape memory alloy friction composite vibration isolator Download PDFInfo
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- CN103255851B CN103255851B CN201310145952.8A CN201310145952A CN103255851B CN 103255851 B CN103255851 B CN 103255851B CN 201310145952 A CN201310145952 A CN 201310145952A CN 103255851 B CN103255851 B CN 103255851B
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Abstract
The invention discloses a shape memory alloy friction composite vibration isolator which comprises an inner barrel and an outer barrel, wherein the inner barrel is connected with an upper flange, the outer barrel is connected with a lower flange, the inner barrel and the outer barrel are coaxial, and the inner barrel is connected with the outer barrel through multiple layers of austenite shape memory alloy standard wires in the axial direction. A slidable inner barrel base is arranged under the inner barrel, an axial austenite shape memory alloy spring and a plurality of sets of radial austenite shape memory alloy springs are arranged inside the slidable inner barrel base, the radial austenite shape memory alloy springs are connected with the inner barrel through a sliding friction pair, and the lower portion of the slidable inner barrel base is connected with the outer barrel through a self-adapted sliding friction pair. A slope with a small upper portion and a large lower portion is arranged on the front portion of a sliding block, and a chamfer corresponding to the slope is arranged on the outer wall of the lower portion of the inner barrel. According to the shape memory alloy friction composite vibration isolator, the austenite shape memory alloy is characterized in that deformation self-reset capacity is strong and the energy consumption of friction elements is high, the characteristics of the austenite shape memory alloy are made full use, and the purposes of multidirectional and vertical vibration control in the horizontal plane and self-reset are achieved.
Description
Technical field
The invention belongs to technical field of civil engineering, particularly a kind of shape memory alloy friction composite vibration isolator.
Background technology
Engineering structures antidetonation is one of emphasis problem must studied in field of engineering technology.The profound disaster that strong earthquake brings is obvious to all, and the building structure such as a large amount of bridges are destroyed overnight under severe earthquake action, thus causes huge economy and social loss.Therefore, in civil structure design, science must be carried out and strict seismic design to structure.Structural vibration control technology provides effective method for designing and approach for seismic design.Structural vibration control is by absorbing, vibration isolation or initiatively inputs by outside the level of vibration that energy carrys out Control Engineering agent structure, in order to avoid strong vibration causes destruction or the damage of engineering structures.In Practical Project, be the dynamics carrying out change structure by installing certain element or device in the structure, thus reach the object of structural vibration control.Tradition vibration isolation technique is very ripe as main structural vibration control means, but the isolation mounting at present engineering applied still Problems existing have: Self-resetting poor performance, such as frcition damper and soft firm damper etc. after shake; More difficult maintenance, such as viscous damper etc.; Durability and corrosion resistance poor, the rubber pad of such as rubber shock absorber is easily aging.
Marmem is a kind of new material, has unique shape memory effect and pseudoelasticity (super-elasticity).Wherein shape memory effect makes this alloy have stronger energy dissipation capacity, and pseudoelasticity makes marmem have large deformation from recovery capacity and certain delayed energy dissipation capacity, and possess outstanding corrosion-resistant, anti-fatigue performance, the vibration isolator utilizing it to construct can overcome the above-mentioned defect of current vibration isolator.But utilize merely pseudoelastic shape-memory alloy to construct damper, seem that energy dissipation capacity is not enough.And fully utilize the pseudoelasticity of marmem and shape memory effect can make design of Structural Parameters too complicated, and cost is higher, and be not easy to engineer applied.
CN 101575882A discloses a kind of mixed type shape memory alloy multi-dimensional vibration isolator, primarily of upper flange, inner core, martensitic shape memory alloy energy dissipation spring, austenite shape memory alloy twisted wire, urceolus, chassis, thin wall profile memorial alloy hollow ball and lower flange composition.Above-mentioned mixed type shape memory alloy multi-dimensional vibration isolator make use of the self-resetting capability of super elastic shape memory alloy and the high damping characteristic of shape memory effect to realize vibration isolation, but the thin wall profile memorial alloy hollow ball placed using outer barrel for the stress of vertical vibration is as load acceptor, its bearing load scope is less, after unloading, reset capability is poor, once overload is long for its resetting time rear, even occur the situation being difficult to reset, this installs acceptor for it and there is great potential safety hazard; In the horizontal direction, adopt martensitic shape memory alloy energy dissipation spring merely as dissipative member, the height of its cost is self-evident, very uneconomical, Comparatively speaking, frictional damping element has stronger energy dissipation capacity, and it is simple and reliable for structure, less expensive, economic and practical; Have again, for the situation of Vibration Condition more complicated, such as basis is with certain situation of rotating, in this device, the inclination of urceolus can cause stressed concentration of local in shape memory alloy hollow ball vertical direction, thus cause alloy hollow ball that non-response distortion occurs even to destroy, add the probability that this device damages.Therefore, need badly and design a kind of novel composite vibration isolator and solve the problems referred to above.
Summary of the invention
The invention provides a kind of novel shape memory alloy friction composite vibration isolator, its object is to solve Self-resetting and poor, the more difficult maintenance of adaptive ability of existing vibration isolator, energy dissipation capacity is not enough, antifatigue and the problem such as corrosion resistance is poor, vibration isolation direction is single.
For achieving the above object, the technical solution used in the present invention is: a kind of shape memory alloy friction composite vibration isolator, comprise the inner core and the urceolus being connected lower flange that connect upper flange, described inner core and urceolus coaxial, described inner core is radially connected by multilayer austenite shape memory alloy twisted wire with between urceolus, slidably inner core base is set below described inner core, described slidably inner core chassis interior arranges axial austenite shape memory alloy spring and some groups of radial austenite shape memory alloy springs, described radial austenite shape memory alloy spring connects described inner core by sliding friction pair, described slidably inner core base bottom connects described urceolus by self adaptation sliding friction pair.
Described austenite shape memory alloy twisted wire is circumferentially arranged symmetrically with six groups or eight groups at inner core, urceolus, and often group is set to three layers or five layers, and the end of described austenite shape memory alloy twisted wire is fixed snap ring by twisted wire and fixed.
Described slidably inner core chassis interior arranges interior step, the medial surface of described interior step arranges the mount pad of described radial austenite shape memory alloy spring, and described radial austenite shape memory alloy spring at front end is arranged can the slide block of movement on described interior step.
Described slidably inner core base upper side arranges the mount pad endoporus installing described radial austenite shape memory alloy spring, and described radial austenite shape memory alloy spring at front end setting unit stretches out the slide block of described mount pad endoporus.
Described slide block front portion arranges up-small and down-big inclined-plane, and described inclined-plane arranges concave arc, and described inner core bottom outer wall arranges the chamfering corresponding with described inclined-plane.
Described sliding friction pair comprises outer half pair of described slide block front portion and interior half pair of described inner tank theca.
Second on first secondary and described urceolus bottom surface that described self adaptation sliding friction pair comprises that slidably inner core base end face arranges is secondary, and the contact surface of described upper and lower half pair is set to have necessarily recessed cambered surface.
Described sliding friction pair and described self adaptation sliding friction pair adopt polytetrafluoroethylene (PTFE) product.
Described austenite shape memory alloy twisted wire surface coats every hydrogen layer.
Described inner core and outer barrel surface arrange antirust coat.
The two ends up and down of shape memory alloy friction composite vibration isolator of the present invention are by upper flange and lower flange and supporting bolt, nut is fixed in the structure needing to carry out vibration isolation, guarantee described inner core and urceolus coaxial, described inner core is radially connected by multilayer austenite shape memory alloy twisted wire with between urceolus, described austenite shape memory alloy twisted wire is set to three layers or five layers, span accounts for the over half of urceolus height, every one deck includes described inner core, six groups or eight groups of austenite shape memory alloy twisted wires that urceolus is circumferentially arranged symmetrically with, can after the unloading of proof stress load in differing heights aspect multiple spot do work simultaneously, ensure that structure has enough reset capabilities and certain energy dissipation capacity, described austenite shape memory alloy twisted wire end arranges twisted wire and fixes snap ring, the initial strain of austenite shape memory alloy twisted wire can being made to be positioned at the mid point of marmem stress-induced martensitic phase transformation stress-strain curves platform by regulating twisted wire to fix snap ring, ensureing the energy dissipation capacity of marmem small deformation and the reset capability of large deformation, described slidably inner core chassis interior arranges axial austenite shape memory alloy spring, and upper end connects described inner core, consumes energy, and realizing Self-resetting after unloading for during vertical direction vibrational state.
In described slidably inner core base, the side of step is by described radial austenite shape memory alloy spring connection sliding block, and described slide block radially can slide on step in slidably inner core base; Here also can adopt another kind of installation form: the mount pad endoporus installing described radial austenite shape memory alloy spring is set on the upside of described slidably inner core chassis interior, described radial austenite shape memory alloy spring at front end setting unit stretches out the slide block of described mount pad endoporus, described mount pad endoporus possesses the effect of guide rail and mount pad simultaneously, and these two kinds of approach all can assist the radial parking position accuracy realizing inner core after unloading.
Described slide block front portion arranges up-small and down-big inclined-plane, described inclined-plane arranges concave arc, be convenient to be adapted to described inner core, in the vertical direction has certain reset guide effect, the chamfering that described inner core bottom outer wall is arranged, coordinate described outer partly secondary and described interior half secondary formation sliding friction pair, the vertical direction vibrational energy for inner core plays good power consumption effect.
Described slidably inner core base bottom connects described urceolus by self adaptation sliding friction pair; Second pair on first secondary and described urceolus bottom surface that described self adaptation sliding friction pair comprises that slidably inner core base end face arranges, the contact surface of described upper and lower half pair forms necessarily recessed cambered surface, the stress residing for the present invention can be adaptive to, thus reduce the uneven impact on structural reliability and anti-destructive of the local pressure caused due to minor rotation in basic small skew and vertical plane; Described sliding friction pair and described self adaptation sliding friction pair adopt polytetrafluoroethylene (PTFE) product, and with low cost, energy consumption effect is good.
Described austenite shape memory alloy twisted wire surface coats every hydrogen layer, the extraneous hydrogen atom of effective isolation and hydride are to the phase transformation on marmem surface in ag(e)ing process and destruction, avoid producing hydrogen and cause ageing crack caused by the larger tensile stress of surface contraction generation, improve the austenite shape memory alloy twisted wire of the present invention adaptive capacity of environment and the persistence of use thereof to external world; Described inner core and outer barrel surface arrange antirust coat, prevent environmental factor from causing corrosion, damage, improve its application life.
The operating principle of shape memory alloy friction composite vibration isolator of the present invention: when there being horizontal direction basic excitation, in horizontal plane, relative motion is had between described inner core and urceolus, now described austenite shape memory alloy twisted wire always has portion stretches and part to shorten, in this motion process, to dissipate certain energy because marmem adds the hysteresis effect that unloading formed, meanwhile, the self adaptation sliding friction pair of described slidably inner core base also will consume a large amount of energy in horizontal movement, thus play the object of vibration isolation in horizontal direction, described inner core self-resetting under the effect of described austenite shape memory alloy twisted wire after vibration terminates, because described austenite shape memory alloy twisted wire is along the circumferential direction arranged symmetrically with, vibration isolation and the Self-resetting of arbitrary orientation in horizontal plane can be realized, when there being the basic excitation of vertical direction, described inner core has the relative motion of vertical direction relative to the described slide block of slidably inner core base, now described axial austenite shape memory alloy spring and the sliding friction pair that arranges between described inner core lower end side and described slide block play dual power consumption effect, thus control the vertical vibration of described inner core, by described austenite shape memory alloy spring, described inner core is resetted after vibration terminates, simultaneously, slidably the self adaptation sliding friction pair of inner core base bottom is designed to certain cambered surface, basic small skew can be reduced and rotate the impact caused.
Shape memory alloy friction composite vibration isolator of the present invention has fully utilized large deformation self-resetting capability and the friction element highly energy-consuming feature of austenite shape memory alloy, the object by control structure vibration isolation multi-direction and vertical in horizontal plane and self-resetting can be realized, and the design of the cambered surface of friction pair can reduce basic small skew and rotate the stressed concentration phenomenon brought, and effectively improves adaptivity and the reliability of structure.The present invention can realize structure transverse direction, vertical multi-faceted vibration isolation function, can tackle the load such as the earthquake of random direction, have very strong universality.
The present invention has efficient passive energy dissipation effect and reliable Self-resetting performance, and simple and reliable for structure, saves expensive material, and making and installation is convenient, easily safeguards, and durability and corrosion resistance are by force, can reduce the repair after by control structure and vibration isolator shake.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described further:
Fig. 1 is that the one of shape memory alloy friction composite vibration isolator of the present invention partly cuts open structural representation;
Fig. 2 is that the A-A of Fig. 1 of shape memory alloy friction composite vibration isolator of the present invention partly cuts open top view;
Fig. 3 is the structural representation of shape memory alloy friction composite vibration isolator slide block of the present invention;
Fig. 4 is that another of shape memory alloy friction composite vibration isolator of the present invention partly cuts open structural representation.
Detailed description of the invention
Specific embodiment one
As shown in Figure 1, Figure 2 and Figure 3, a kind of shape memory alloy friction composite vibration isolator, comprise the inner core 2 and the urceolus 4 being connected lower flange 3 that connect upper flange 1, described inner core 2 and urceolus 4 coaxial, described inner core 2 realizes radially being connected by the eight groups of austenite shape memory alloy twisted wires 5 be circumferentially arranged symmetrically with between urceolus 4, often organize described austenite shape memory alloy twisted wire 5 and be set to five layers, the end of described austenite shape memory alloy twisted wire 5 is fixed snap ring 6 by twisted wire and is fixed; Slidably inner core base 7 is set below described inner core 2, described slidably inner core base 7 inside arranges axial austenite shape memory alloy spring 8 and some groups of radial austenite shape memory alloy springs 9, described radial austenite shape memory alloy spring 9 is set to four groups or six groups or eight groups, often organize described radial austenite shape memory alloy spring 9 and connect described inner core 2 by sliding friction pair 10, described slidably inner core base 7 bottom connects described urceolus 4 by self adaptation sliding friction pair 11.
Described slidably inner core base 7 inside arranges interior step 12, the medial surface of described interior step 12 arranges the mount pad of described radial austenite shape memory alloy spring 9, and described radial austenite shape memory alloy spring 9 front end is arranged can the slide block 13 of movement on described interior step 12; Described slide block 13 front portion arranges up-small and down-big inclined-plane 14, and described inclined-plane 14 arranges concave arc, and described inner core 2 bottom outer wall arranges the chamfering 15 corresponding with described inclined-plane 14.
Described sliding friction pair 10 comprises outer half pair of described slide block 13 front portion and interior half pair of described inner core 2 outer wall.
Second on first secondary and described urceolus 4 bottom surface that described self adaptation sliding friction pair 11 comprises that slidably inner core base 7 bottom surface arranges is secondary, and the contact surface of described upper and lower half pair is set to have necessarily recessed cambered surface 16.
Described sliding friction pair 10 and described self adaptation sliding friction pair 11 adopt polytetrafluoroethylene (PTFE) product.
Described austenite shape memory alloy twisted wire 5 surface coats every hydrogen layer.
Described inner core 2 and urceolus 4 surface arrange antirust coat.
Specific embodiment two
As shown in Figure 4, be with the difference of specific embodiment one: described slidably inner core base 7 upper side arranges the mount pad endoporus 17 installing described radial austenite shape memory alloy spring 9, described radial austenite shape memory alloy spring 9 front end setting unit stretches out the slide block 13 of described mount pad endoporus 17.
Specific embodiment three
Be with the difference of specific embodiment one or two: described austenite shape memory alloy twisted wire 5 is circumferentially arranged symmetrically with six groups at inner core 2, urceolus 4, often organize described austenite shape memory alloy twisted wire 5 and be set to five layers.
Specific embodiment four
Be with the difference of specific embodiment one or two: described austenite shape memory alloy twisted wire 5 is circumferentially arranged symmetrically with six groups or eight groups at inner core 2, urceolus 4, often organize described austenite shape memory alloy twisted wire 5 and be set to three layers.
In above-described embodiment, shape memory alloy friction composite vibration isolator of the present invention design and produce technique:
Step 1: carry out dynamic analysis to engineering structures, requires according to anti-vibration performance the design parameter designing vibration isolator;
Step 2: above-mentioned urceolus 4 is welded on lower flange 3, then secondary at second of described urceolus 4 bottom adhesive polytetrafluoroethylene (PTFE) self adaptation sliding friction pair 11;
Step 3: first pasting polytetrafluoroethylene (PTFE) self adaptation sliding friction pair 11 in slidably inner core base 7 bottom surface is secondary, and on second pair being placed in the self adaptation sliding friction pair 11 bottom described urceolus 4, ensures that slidably inner core base 7 and urceolus 4 are coaxial;
Step 4: outer half secondary and interior half pair of the polytetrafluoroethylene (PTFE) sliding friction pair 10 that bonds at slide block 13 and inner core 2 bottom sides respectively;
Step 4: in the inner bottom surface installation shaft of slip inner core base 7 to austenite shape memory alloy spring 8, step 12 or mount pad endoporus 17 is circumferentially installed symmetrically four groups or six groups or eight groups of radial austenite shape memory alloy springs 9 and slide block 13 combinations of pairs within it;
Step 5: described in being placed on described inner core 2 lower end slidably on inner core base 7, described axial austenite shape memory alloy spring 8 is contacted with described inner core 2 bottom surface, and side is contacted with described slide block 13 by sliding friction pair 10;
Step 6: lay three layers or five layers of austenite shape memory alloy twisted wire 5 between described inner core 2 and urceolus 4, described austenite shape memory alloy twisted wire 5 adopts surface to coat product every hydrogen layer, and is circumferentially arranging six groups or eight groups symmetrically at every layer;
Step 7: fix the prestrain that snap ring 6 regulates austenite shape memory alloy twisted wire 5 by described twisted wire, makes the prestrain of each group of austenite shape memory alloy twisted wire 5 all reach the mid point of stress-strain curves platform corresponding to marmem stress-induced martensitic phase transformation;
Step 8: the mechanism of the present invention assembled is arranged on by the installing hole of upper flange 1 and the installing hole of lower flange 3 and needs in the structure of vibration isolation.
The shape memory alloy friction composite vibration isolator of the present invention adopting said structure and technique to prepare has fully utilized large deformation self-resetting capability and the friction element highly energy-consuming feature of austenite shape memory alloy, the object by control structure vibration isolation multi-direction and vertical in horizontal plane and self-resetting can be realized, and the design of the cambered surface of friction pair can reduce basic small skew and rotate the stressed concentration phenomenon brought, and effectively improves adaptivity and the reliability of structure.The present invention can realize structure transverse direction, vertical multi-faceted vibration isolation function, can tackle the load such as the earthquake of random direction, have very strong universality.
The present invention has efficient passive energy dissipation effect and reliable Self-resetting performance, and simple and reliable for structure, saves expensive material, and making and installation is convenient, easily safeguards, and durability and corrosion resistance are by force, can reduce the repair after by control structure and vibration isolator shake.
Claims (2)
1. a shape memory alloy friction composite vibration isolator, comprise the inner core and the urceolus being connected lower flange that connect upper flange, described inner core and urceolus coaxial, it is characterized in that: described inner core is radially connected by multilayer austenite shape memory alloy twisted wire with between urceolus, slidably inner core base is set below described inner core, described slidably inner core chassis interior arranges axial austenite shape memory alloy spring and some groups of radial austenite shape memory alloy springs, described radial austenite shape memory alloy spring connects described inner core by sliding friction pair, described slidably inner core base bottom connects described urceolus by self adaptation sliding friction pair, described austenite shape memory alloy twisted wire is at inner core, urceolus is circumferentially arranged symmetrically with six groups or eight groups, often group is set to three layers or five layers, the end of described austenite shape memory alloy twisted wire is fixed snap ring by twisted wire and is fixed.
2. shape memory alloy friction composite vibration isolator as claimed in claim 1, it is characterized in that: described slidably inner core chassis interior arranges interior step, the medial surface of described interior step arranges the mount pad of described radial austenite shape memory alloy spring, and described radial austenite shape memory alloy spring at front end is arranged can the slide block of movement on described interior step.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510225470.2A CN104805925B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
| CN201510225213.9A CN104929262B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
| CN201510225476.XA CN104805926B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction combined vibration isolator |
| CN201510225135.2A CN104929261B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
| CN201510225394.5A CN104847032B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
| CN201310145952.8A CN103255851B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
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| CN201310145952.8A CN103255851B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
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| CN201510225394.5A Division CN104847032B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
| CN201510225476.XA Division CN104805926B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction combined vibration isolator |
| CN201510225135.2A Division CN104929261B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
| CN201510225213.9A Division CN104929262B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
| CN201510225470.2A Division CN104805925B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
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| CN103255851B true CN103255851B (en) | 2015-06-10 |
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| CN201510225213.9A Active CN104929262B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
| CN201310145952.8A Expired - Fee Related CN103255851B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
| CN201510225135.2A Active CN104929261B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
| CN201510225476.XA Active CN104805926B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction combined vibration isolator |
| CN201510225394.5A Active CN104847032B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
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| CN201510225213.9A Active CN104929262B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
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| CN201510225476.XA Active CN104805926B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction combined vibration isolator |
| CN201510225394.5A Active CN104847032B (en) | 2013-04-25 | 2013-04-25 | Shape memory alloy friction composite vibration isolator |
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| CN104929262A (en) * | 2013-04-25 | 2015-09-23 | 河南行知专利服务有限公司 | Shape memory alloy friction composite vibration isolator |
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| CN106381941B (en) * | 2016-11-09 | 2018-08-28 | 河南理工大学 | A kind of shape memory alloy spring bump leveller containing collisional damping energy-consuming device |
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| CN104929262A (en) * | 2013-04-25 | 2015-09-23 | 河南行知专利服务有限公司 | Shape memory alloy friction composite vibration isolator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104847032A (en) | 2015-08-19 |
| CN104847032B (en) | 2017-06-13 |
| CN104929261B (en) | 2017-12-15 |
| CN104929262B (en) | 2017-10-31 |
| CN104805925B (en) | 2017-05-31 |
| CN104929261A (en) | 2015-09-23 |
| CN103255851A (en) | 2013-08-21 |
| CN104929262A (en) | 2015-09-23 |
| CN104805926A (en) | 2015-07-29 |
| CN104805925A (en) | 2015-07-29 |
| CN104805926B (en) | 2017-05-24 |
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