CN201087578Y - Vertical vibration isolation device with variable stiffness and damp - Google Patents
Vertical vibration isolation device with variable stiffness and damp Download PDFInfo
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- CN201087578Y CN201087578Y CNU2007201041540U CN200720104154U CN201087578Y CN 201087578 Y CN201087578 Y CN 201087578Y CN U2007201041540 U CNU2007201041540 U CN U2007201041540U CN 200720104154 U CN200720104154 U CN 200720104154U CN 201087578 Y CN201087578 Y CN 201087578Y
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- pull bar
- spring
- rigidity
- oil damper
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Abstract
The utility model relates to a variable rigidity variable damping vertical vibration/ isolation mounting which belongs to the structural vibration control field. The vibration/ isolation mounting comprises an upper connection plate and a lower connection plate (2 and 1), a set-up spring (3) with smaller vertical rigidity, a variable rigidity counterpoise spring (4) with greater vertical rigidity, a small oil pressure damper which is arranged inside the set-up spring and a big oil pressure damper which is arranged inside the counterpoise spring, wherein, the variable rigidity counterpoise spring is positioned at the center of the lower connection plate, the upper end of the variable rigidity counterpoise spring perforates through a first prepared hole (17) of a first compensation support saddle (11) to ensure that the upper end of the counterpoise spring is in an unrestricted state; the set-up spring is distributed around the variable rigidity counterpoise spring; the bottom surface of the upper connection plate is fixed with a plurality of second compensation support saddles (12); the bottom ends of both the big oil pressure damper and the small oil pressure damper are fixed with the lower connection plate, the upper ends of the big oil pressure damper and the small oil pressure damper are restricted by the second compensation support saddles. The utility model can isolate the tiny environmental vibration in the vertical direction and the earthquake motion in the vertical direction; the utility model can be also combined with other horizontal vibration/isolation support saddles to form a three-way vibration/isolation support saddle.
Description
Technical field
The utility model relates to the vertical vibration isolation of a kind of change stiffness and damping changing/shake device, belongs to field of vibration control.
Background technology
Along with the continuous development of urban track traffic and elevated line, the also more and more serious health that is endangering the townsfolk of ambient vibration of bringing out by track traffic and elevated line; The large-and-medium size cities population increase, the urban space utilization rate improves constantly, increasing building next-door neighbour builds the traffic route, make ambient vibration also loom large more to the influence that people cause, studies show that the ambient vibration that is caused by track traffic and elevated line is based on vertical motion, yet, the control device of ambient vibration and technology are still not mature enough, and domestic also do not have the ambient vibration control technology product of moulding available at present.
It is generally acknowledged that horizontal earthquake starts to control making usefulness to structural damage, but a large amount of earthquake disasters shows that vertical earthquake can not be ignored the influence of works, its effect surpasses horizontal earthquake action sometimes.Because the vertical rigidity of structure is big, its vertical natural period is close with the vertical seismic wave predominant period, thereby the vertical vibrant characteristic of structure merits attention and studies.Though seismic isolation technology is ripe relatively at home and abroad, and industrialization day by day, what present seismic isolation technology was isolated mainly is the earthquake motion of horizontal direction, and vertical earthquake motion is not almost had isolating affection.The vertical earthquake isolating technological development becomes the focus of each big universities and colleges and research institution's research.
To the vertical earthquake isolating problem of structure, the foreign scholar proposed some three-dimensional shock isolation supports, but because vertical rigidity is bigger, was difficult to again provide in limited scope and isolates the required damping of vertical geological process, and vertical energy dissipation capacity and isolating affection are limited; The employing disk spring that domestic scholars also once proposed is isolated vertical earthquake motion, has started the precedent of China's research level/vertical earthquake isolating bearing; But because disk spring is vertical load bearing element, vertical rigidity is bigger, and vibration is worked hardly to isolation environment, and disk spring can not provide resistance to tension, and this hides some dangers in earthquake for isolation structure temporarily.
The utility model content
The purpose of this utility model is to solve above-mentioned two problems that press for solution: isolate vertical ambient vibration and vertical earthquake motion.Get rid of ambient vibration for a long time to the interference of resident's daily life, isolate the transmission of vertical earthquake motion to superstructure.The utility model can be taken into account the influence of ambient vibration and earthquake motion simultaneously, isolates two kinds of vibrations simultaneously.
For achieving the above object, the technical solution adopted in the utility model is: become the vertical vibration isolation of stiffness and damping changing/shake device, comprise upper junction plate 2, lower connecting plate 1, go up the pre-compressed spring with less vertical rigidity 3 between the lower connecting plate, the change rigidity counterbalance spring 4 of bigger vertical rigidity, be arranged on little oil damper in the pre-compressed spring 3, be arranged on the interior big oil damper of counterbalance spring 4; Wherein, become the center that rigidity counterbalance spring 4 is positioned at lower connecting plate 1, bottom and lower connecting plate 1 are fixing, the upper end penetrates in first preformed hole 17 that is fixed on the compensation of first on upper junction plate bottom surface bearing 11, first preformed hole 17 is oval, the part that the upper end of counterbalance spring 4 penetrates wherein can be free to slide in the in the vertical direction certain displacement scope, makes the counterbalance spring upper end be in no restrained condition.Pre-compressed spring 3 is distributed in and becomes around the rigidity counterbalance spring 4; Be fixed with a plurality of second compensation bearing, 12, the second compensation bearings 12 on upper junction plate 2 bottom surfaces and be provided with vertical intercommunicating pore 20, horizontal second preformed hole 13.Described big oil damper bottom and lower connecting plate 1 are fixing, and its upper end is subjected to the constraint of the second compensation bearing 12 corresponding with it; Big oil damper is made of first fuel tank 15, first pull bar 5, first hole 7, first oil 6 and big keyhole 18, be full of first oil 6 in first fuel tank 15, first pull bar, 5 base plates place first fuel tank internal, first fuel tank is divided into two spaces, first oil can only flow in two spaces by first hole 7 on first pull bar, and big keyhole 18 is positioned at the top of first pull bar 5.Insert in the intercommunicating pore 20 of the second compensation bearing 12 corresponding with it first pull bar, 5 upper ends, passes big keyhole 18 on second preformed hole 13 and the pull bar with shearing bolt 14, and vertically leaving a fixed gap.
Described little oil damper bottom and lower connecting plate 1 are fixing, and its upper end is subjected to the constraint of the second compensation bearing 12 corresponding with it.Little oil damper is made of second fuel tank 16, second pull bar 8, second hole 10, second oil 9 and spile hole 19, be full of second oil 9 in second fuel tank 16, the base plate of second pull bar 8 places second fuel tank internal, second fuel tank is divided into two spaces, and second oil can only flow in two spaces by second hole 10 on second pull bar.Spile hole 19 is positioned at the top of second pull bar 8.Little oil damper bottom and lower connecting plate 1 are fixing, insert in the intercommunicating pore 20 of the second compensation bearing 12 corresponding with it second pull bar, 8 upper ends, pass spile hole 19 on second preformed hole 13 and the pull bar on the second compensation bearing 12 with shearing bolt 14, and vertically leaving a fixed gap.
The second compensation bearing 12 only in the next interim or bigger vibration of structure appearance of earthquake, is just started working so-called change damping when the bearing vertical displacement surpasses a threshold value.
Second preformed hole 13 is oval, shears bolt 14 and can be free to slide within the specific limits at the vertical direction of second preformed hole 13.Insert different bolts as required, make the pore size between the bolt and second preformed hole 13 adjustable.
Described big oil damper and little oil damper are cross and arrange in the middle of last lower connecting plate, be that big oil damper is in the centre, little oil damper is distributed on four angles, collaborative work, both can provide vertical damping power, can be used as vertical ways again, promptly they have less vertical rigidity and enough horizontal rigidities, can retrain the horizontal distortion of vertical support.Pre-compressed spring 3 supports upper load, has less vertical rigidity, and is very sensitive to the high frequency microvibration, is mainly used to isolate the vertical microvibration and the ambient vibration of high frequency.Become rigidity counterbalance spring 4 and have bigger vertical rigidity; In earthquake arriving or structure bigger vibration appears only, when surpassing the certain displacement limit value, the bearing vertical displacement just starts working, the pulling force and the holding power of certain rigidity can be provided, change the shock insulation rigidity of former shock insulation structure, can prevent the structure destruction of under the excessive situation of vertical displacement, toppling.
Have the flanging that prevents pre-compressed spring 3 unstabilitys around the last lower connecting plate, the height of flanging can design according to the size of precompression and the height of bearing.
The utility model can with various horizontal shock insulation members, as combinations such as lead rubber bearing, metal friction sliding isolated bearings, form three-dimensional vibration isolation/shake device.
Advantage of the present utility model is:
1. the utility model both can have been isolated the small ambient vibration on the vertical direction, also can isolate vertical earthquake motion.
2. the utility model adopts big or small oil damper, can be arranged in difformity as required, and collaborative work both can provide bigger vertical damping power, can be used as the ways of vertical motion again, and horizontal movement appears in the restriction vertical support, and is flexible and changeable.
3. therefore the utility model can change the rigidity and the damping of bearing according to the difference of vertical motion amplitude automatically owing to adopted the compensation bearing.
4. this vibration isolation/shake bearing in the vertical direction, the power that not only can provide support can also provide enough pulling force.
5. the utility model can make up with existing horizontal shock isolating pedestal, form three-dimensional vibration isolation/shake bearing, applied range, vibration damping shock insulation applicable to subway, viaduct building structure along the line, the vibration damping shock insulation of building such as high-new precision instrument is installed, the vibration isolation of ancient building/shake is reinforced, and any occasion that existing laminated rubber bases was suitable for.
Description of drawings
Fig. 1 is the structure diagram of a kind of embodiment of the utility model;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the B-B sectional view of Fig. 1;
Fig. 4 (a) is big oil damper front view;
Fig. 4 (b) is big oil damper left view;
Fig. 5 (a) is little oil damper front view;
Fig. 5 (b) is little oil damper left view;
Fig. 6 is big oil damper pull bar vertical view;
Fig. 7 is little oil damper pull bar vertical view;
Fig. 8 (a) is the first compensation bearing front view;
Fig. 8 (b) is the first compensation bearing left view;
Fig. 8 (c) is the first compensation bearing vertical view;
Fig. 9 (a) is the second compensation bearing front view;
Fig. 9 (b) is the second compensation bearing left view;
Fig. 9 (c) is the second compensation bearing vertical view;
Figure 10 is the structure diagram of second kind of embodiment of the present utility model;
Figure 11 is the structure diagram of the third embodiment of the present utility model;
Among the figure, 1, lower connecting plate, 2, upper junction plate, 3, pre-compressed spring, 4, counterbalance spring 5, first pull bar, 6, first oil, 7, first hole, 8, second pull bar, 9, second oil, 10, second hole, 11, the first compensation bearing, 12 second compensation bearings, 13, second preformed hole, 14, shear bolt, 15, first fuel tank, 16, second fuel tank, 17, first preformed hole, 18, big keyhole, 19, little keyhole, 20, intercommunicating pore, 21, horizontal lead rubber bearing, 22, the metal friction slip support abutment.
The specific embodiment
Specify embodiment of the present utility model below in conjunction with accompanying drawing.
As shown in Figure 1, become the vertical vibration isolation of stiffness and damping changing/shake apparatus structure referring to Fig. 1, Fig. 2, Fig. 3, comprising: the change rigidity counterbalance spring 4 of the pre-compressed spring with less vertical rigidity 3 between upper junction plate 2, lower connecting plate 1, the upper and lower junction plate, big vertical rigidity, be arranged on little oil damper in the pre-compressed spring 3, be arranged on the interior big oil damper of counterbalance spring 4.Wherein, become the vertical rigidity of the vertical rigidity of rigidity counterbalance spring 4 greater than pre-compressed spring 3, can be 50 to 500 times, preferable range of choice is 80 to 150 times.Become rigidity counterbalance spring 4 upper ends and penetrate in first preformed hole 17 of the compensation bearing 11 that is fixed on the upper junction plate bottom surface, make the counterbalance spring upper end be in no restrained condition.Big oil damper bottom and lower connecting plate 1 are fixing, and big oil damper is made of first fuel tank 15, first pull bar 5, first hole 7, first oil 6 and big keyhole 18, referring to Fig. 4.Insert in the intercommunicating pore 20 of the second compensation bearing 12 corresponding with it first pull bar, 5 upper ends, passes big keyhole 18 on second preformed hole 13 and the pull bar with shearing bolt 14, and vertically leaving a fixed gap.First hole 7 radial on the pull bar base plate is arranged, referring to Fig. 6.
Little oil damper is made of second fuel tank 16, second pull bar 8, second hole 10, second oil 9 and spile hole 19, referring to Fig. 5.Little oil damper bottom and lower connecting plate 1 are fixing, insert in the intercommunicating pore 20 of second fixing on upper junction plate 2 bottom surfaces compensation bearing 12 second pull bar, 8 upper ends, pass spile hole 19 on second preformed hole 13 and the pull bar on the second compensation bearing 12 with shearing bolt 14, and vertically leaving a fixed gap.Second hole 10 is evenly along the circumferential direction arranged on the pull bar base plate, referring to Fig. 7.
Second preformed hole 13 is oval, and referring to Fig. 8, shearing bolt 14 can be free to slide in the vertical direction certain limit in second preformed hole 13, inserts different bolts as required, makes the pore size between the bolt and second preformed hole 13 adjustable.
The size oil damper is cross and arranges in the middle of last lower connecting plate, be that big oil damper is in the centre, little oil damper is distributed on four angles, collaborative work, referring to Fig. 2, both can provide vertical damping power, can be used as vertical ways again, be that they have less vertical rigidity and enough horizontal rigidities, can retrain the horizontal distortion of vertical support.Pre-compressed spring 3 supports upper load, has less vertical rigidity, and is very sensitive to the high frequency microvibration, is mainly used to isolate the vertical microvibration and the ambient vibration of high frequency.Become rigidity counterbalance spring 4 and have bigger vertical rigidity; In earthquake arriving or structure bigger vibration appears only, when surpassing the certain displacement limit value, the bearing vertical displacement just starts working, the pulling force and the holding power of certain rigidity can be provided, change the shock insulation rigidity of former shock insulation structure, can prevent the structure destruction of under the excessive situation of vertical displacement, toppling.
During duty (only ambient vibration is done the time spent), vertical vibration isolation/shake bearing is in the undamped elastic state at ordinary times, and upper load is born by pre-compressed spring 3 fully, and the rigidity of the pre-compressed spring 3 of vertical support is less, can isolate the high frequency microvibration; The upper end of counterbalance spring 4 penetrates first preformed hole 17 of the first compensation bearing 11, be in no restrained condition, do not transmit vertical load, insert in the second compensation bearing 12 that is fixed on upper junction plate 2 bottom surfaces the one or two pull bar 5,8 upper ends of size oil damper, pass spile hole 19 on second preformed hole 13 and the pull bar on the second compensation bearing 12 with shearing bolt 14, and vertically leaving a fixed gap, make the upper end of the one or two pull bar 5,8 in certain vertical displacement scope, not bear the shearing that microvibration is transmitted.
When earthquake is arrived, ground vibration is bigger, amplitude is higher, and the vertical displacement of bearing surpasses default regime of elastic deformation, and the pull bar of big or small oil damper is under the effect of upper junction plate 2, produce big displacement, when displacement surpasses a threshold value, drive big or small oil damper work, make vertical support enter damping state by the undamped state, oil shuttles back and forth in the hole on pull bar, earthquake energy; Simultaneously, when the vertical displacement of upper junction plate 2 surpasses a threshold value, the first compensation bearing 11 will drive counterbalance spring 4 and start working, and increase the vertical extensional rigidity and the compressional stiffness of shock isolating pedestal, avoid bearing bigger vertical deformation to occur and cause danger.When earthquake finished, vertical vibration isolation/shake bearing recovered elastic stage by the elastoplasticity duty, and has good reset function, maintenance-free under spring action.Therefore becoming the vertical vibration isolation of stiffness and damping changing/shake device can well isolate the influence of vertical earthquake to works.
As shown in figure 10, be another embodiment of the present utility model, be composed in series that vertical support wherein is identical with above example structure by vertical support and lead for retractable pencil laminated rubber damping bearing 21.
As shown in figure 11, be another embodiment of the present utility model, be composed in series that vertical support wherein is identical with above example structure by vertical support and metal friction slip support abutment 22.
Claims (7)
1. become the vertical vibration isolation of stiffness and damping changing/shake device, comprise upper and lower junction plate (2,1), it is characterized in that: also comprise the pre-compressed spring with less vertical rigidity (3) between the upper and lower junction plate (2,1), bigger vertical rigidity change rigidity counterbalance spring (4), be arranged on little oil damper in the pre-compressed spring (3), be arranged on the big oil damper in the counterbalance spring (4); Wherein, become the center that rigidity counterbalance spring (4) is positioned at lower connecting plate (1), bottom and lower connecting plate (1) are fixing, and the upper end penetrates in first preformed hole (17) that is fixed on the compensation bearing of first on the upper junction plate bottom surface (11), make the counterbalance spring upper end be in no restrained condition; Pre-compressed spring (3) is distributed in and becomes rigidity counterbalance spring (4) on every side; Be fixed with a plurality of second compensation bearings (12) on upper junction plate (2) bottom surface, the second compensation bearing (12) is provided with vertical intercommunicating pore (20), horizontal second preformed hole (13); Big oil damper bottom and lower connecting plate (1) are fixing, and its upper end is subjected to the constraint of the second compensation bearing (12) corresponding with it; Little oil damper bottom and lower connecting plate (1) are fixing, and its upper end is subjected to the constraint of the second compensation bearing (12) corresponding with it.
2. the vertical vibration isolation of change stiffness and damping changing according to claim 1/shake device, it is characterized in that: described big oil damper and little oil damper are cross and arrange in the middle of upper and lower junction plate (2,1), be big oil damper in the centre, little oil damper is distributed on four angles.
3. the vertical vibration isolation of change stiffness and damping changing according to claim 2/shake device, it is characterized in that: described big oil damper is made of first fuel tank (15), first pull bar (5), first hole (7), first oil (6) and big keyhole (18), be full of first oil (6) in first fuel tank (15), first pull bar (5) base plate places first fuel tank internal, first fuel tank is divided into two spaces, first oil can only flow in two spaces by first hole (7) on first pull bar, and big keyhole (18) is positioned at the top of first pull bar (5); Insert in the intercommunicating pore (20) of the second compensation bearing (12) corresponding with it first pull bar (5) upper end, passes big keyhole (18) on second preformed hole (13) and the pull bar with shearing bolt (14), and vertically leaving a fixed gap.
4. the vertical vibration isolation of change stiffness and damping changing according to claim 2/shake device, it is characterized in that: described little oil damper is made of second fuel tank (16), second pull bar (8), second hole (10), second oil (9) and little keyhole (19), be full of second oil (9) in second fuel tank (16), the base plate of second pull bar (8) places second fuel tank internal, second fuel tank is divided into two spaces, second oil can only flow in two spaces by second hole (10) on second pull bar, and little keyhole (19) is positioned at the top of second pull bar (8); Insert in the intercommunicating pore (20) of the second compensation bearing (12) corresponding with it second pull bar (8) upper end, pass little keyhole (19) on second preformed hole (13) and the pull bar on the second compensation bearing (12) with shearing bolt (14), and vertically leaving a fixed gap.
5. the vertical vibration isolation of change stiffness and damping changing according to claim 1/shake device is characterized in that: first preformed hole (17) is for oval, and the part that the upper end of counterbalance spring (4) penetrates wherein can be free to slide in the in the vertical direction certain displacement scope.
6. according to claim 3 or the vertical vibration isolation of 4 described change stiffness and damping changings/shake device, it is characterized in that: second preformed hole (13) is sheared bolt (14) and can be free to slide within the specific limits at the vertical direction of second preformed hole (13) for oval.
7. the vertical vibration isolation of change stiffness and damping changing according to claim 1/shake device is characterized in that: the described lower connecting plate (2,1) of going up has the flanging that prevents pre-compressed spring (3) unstability all around.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201041540U CN201087578Y (en) | 2007-04-06 | 2007-04-06 | Vertical vibration isolation device with variable stiffness and damp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201041540U CN201087578Y (en) | 2007-04-06 | 2007-04-06 | Vertical vibration isolation device with variable stiffness and damp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201087578Y true CN201087578Y (en) | 2008-07-16 |
Family
ID=39635171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201041540U Expired - Fee Related CN201087578Y (en) | 2007-04-06 | 2007-04-06 | Vertical vibration isolation device with variable stiffness and damp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201087578Y (en) |
-
2007
- 2007-04-06 CN CNU2007201041540U patent/CN201087578Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080716 |