CN111963609A - Damping-adjustable friction pendulum type cultural relic shock isolation device - Google Patents
Damping-adjustable friction pendulum type cultural relic shock isolation device Download PDFInfo
- Publication number
- CN111963609A CN111963609A CN202010862451.1A CN202010862451A CN111963609A CN 111963609 A CN111963609 A CN 111963609A CN 202010862451 A CN202010862451 A CN 202010862451A CN 111963609 A CN111963609 A CN 111963609A
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- damping
- screw rod
- damping assembly
- guide rail
- orthogonal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
- F16F7/082—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other and characterised by damping force adjustment means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/04—Friction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2230/00—Purpose; Design features
- F16F2230/0005—Attachment, e.g. to facilitate mounting onto confer adjustability
Abstract
The invention discloses a friction pendulum type cultural relic shock isolation device with adjustable damping, and belongs to the technical field of shock absorption and shock isolation. The device comprises a bottom plate, a top plate, a concave disc, a universal ball and an orthogonal damping mechanism; the opposite surfaces of the bottom plate and the top plate are respectively fixed with a concave disc and a universal ball, and the concave disc and the universal ball are in contact fit to provide supporting force; an orthogonal damping mechanism is arranged between the bottom plate and the top plate, and the bottom plate and the top plate are connected together through the orthogonal damping mechanism; the orthogonal damping mechanism decomposes any horizontal relative motion between the bottom plate and the top plate into two self-orthogonal motions and applies damping. The invention can realize the adjustment of the damping while ensuring the integrity of the shock isolation device, and can meet the shock isolation requirements of different occasions.
Description
Technical Field
The invention belongs to the technical field of shock absorption and shock isolation, and particularly relates to a friction pendulum type cultural relic shock isolation device with adjustable damping.
Background
The cultural relics are valuable historical cultural heritages of human beings, have extremely important value and have great protection significance. China has a huge amount of cultural relics in the collection, and except for some traditional earthquake-resistant modes with limited effects, the cultural relics are more in a floating state and are easy to damage in the earthquake. Therefore, the shock isolation device plays an important role in shock-proof safety of cultural relics. The friction pendulum type support is one of effective horizontal shock insulation devices.
The structure of the earthquake-resistant energy dissipation device is extremely simple, a friction pair is mainly formed by the concave disc and the sliding block, the sliding block can do reciprocating motion on the concave surface like a pendulum, and relative friction force is generated to dissipate earthquake energy. The restoring force of the device is provided by gravity, and the natural frequency is adjusted by selecting the radius of the concave spherical surface; the damping parameter value is then determined by the friction coefficient of the contact surface.
When an earthquake comes, the friction pendulum device can weaken horizontal vibration transmitted to the cultural relic on the upper part, but because the disc and the slide block are separated, the friction pendulum device does not have the capability of vertical pulling resistance, and particularly when the friction pendulum device bears a larger vertical earthquake action or reaches the limit horizontal displacement, all parts of the device can be separated and lose efficacy, and the device can cause serious damage to the cultural relic; in addition, the preset friction coefficient has higher requirement on the machining precision, and the friction coefficient is fixed, so that the later adjustment is difficult to realize in general.
Disclosure of Invention
In view of the above, the invention provides a friction pendulum type cultural relic vibration isolation device with adjustable damping, which can ensure the integrity of the vibration isolation device, can realize the adjustment of damping parameters, and can meet the vibration isolation requirements of different occasions.
A friction pendulum type cultural relic shock isolation device with adjustable damping comprises a bottom plate, a top plate, a concave disc, a universal ball and an orthogonal damping mechanism;
a concave disc and a universal ball are respectively fixed on the opposite surfaces of the bottom plate and the top plate, and the concave disc and the universal ball are in contact fit to provide supporting force; an orthogonal damping mechanism is arranged between the bottom plate and the top plate, and the bottom plate and the top plate are connected together through the orthogonal damping mechanism; the orthogonal damping mechanism decomposes any horizontal relative motion between the bottom plate and the top plate into two self-orthogonal motions and applies damping.
Furthermore, the orthogonal damping mechanism comprises an upper screw damping assembly and a lower screw damping assembly, the upper screw damping assembly and the lower screw damping assembly are connected through hole shaft matching, the upper screw damping assembly and the lower screw damping assembly have freedom degree of movement along the axis direction of the hole shaft so as to adapt to height change of the universal ball generated in the motion process of the concave disc, and the upper screw damping assembly and the lower screw damping assembly respectively have freedom degree of movement along the direction perpendicular to the axis direction of the hole shaft.
Further, the upper screw damping assembly comprises a mounting plate, a screw supporting seat, a damper, a guide rail, a sliding block, a driving nut, a guide sleeve and a nut supporting seat;
the sliding block is in embedded fit with the guide rail fixed on the mounting plate, and only the degree of freedom along the direction of the guide rail is arranged between the sliding block and the guide rail; the upper surface of the sliding block is fixedly connected with a guide sleeve, and a strip-shaped guide groove is formed in the guide sleeve; the lead screw and the guide rail are arranged on the mounting plate in parallel, two ends of the lead screw are supported by a lead screw supporting seat fixed on the mounting plate, and the damper is connected with one end or two ends of the lead screw; the screw rod is matched with a driving nut in a nut support, and the nut support is fixedly connected with the sliding block; the lead screw, the drive nut and the damper jointly damp the movement of the slider on the guide rail.
Further, the lower screw damping assembly comprises a mounting plate, a screw supporting seat, a damper, a guide rail, a sliding block, a driving nut, a pin shaft, a guide shaft and a nut supporting seat;
the sliding block is in embedded fit with the guide rail fixed on the mounting plate, and only the degree of freedom along the direction of the guide rail is arranged between the sliding block and the guide rail; the upper surface of the sliding block is fixedly connected with a guide shaft, and the top of the guide shaft is provided with a radial through hole which is used for being matched with a pin shaft; the lead screw and the guide rail are arranged on the mounting plate in parallel, two ends of the lead screw are supported by a lead screw supporting seat fixed on the mounting plate, and the damper is connected with one end or two ends of the lead screw; the screw rod is matched with a driving nut in a nut support, and the nut support is fixedly connected with the sliding block; the lead screw, the drive nut and the damper jointly damp the movement of the slider on the guide rail.
Furthermore, the upper screw damping assembly and the lower screw damping assembly are matched with the guide shaft through the guide sleeve to form a hole shaft, and the pin shaft penetrates through the guide groove in the guide sleeve and the radial hole in the guide shaft at the same time, so that the circumferential freedom degree of the upper screw damping assembly and the lower screw damping assembly is limited, the movement amount of the upper screw damping assembly and the lower screw damping assembly in the axial direction of the hole shaft is also limited, the top plate and the bottom plate are prevented from being separated from each other and overturning, and the anti-drawing capacity of the device is enhanced.
Has the advantages that:
1. the main structure of the invention only comprises a bottom plate fixed with a concave disc, a top plate fixed with a universal ball and an orthogonal damping mechanism, and the invention has simple structure and convenient installation.
2. The invention makes full use of the advantage of small friction coefficient of the universal ball, so that the device can be started and play a role under lower seismic intensity.
3. The invention adopts the cooperation of the universal ball and the concave disc to support the upper object, can select the universal ball according to the load requirement and has strong bearing capacity. The universal ball can generate vertical supporting force and horizontal restoring force in the process of moving in the concave disc, so that the upper bearing object can be automatically reset without adding a reset spring.
4. The orthogonal damping mechanism has the anti-pulling function and can enhance the integrity of the device. The pin shaft penetrates through the guide groove in the guide sleeve and the radial hole in the guide shaft simultaneously to limit the separation height of the upper screw rod damping assembly and the lower screw rod damping assembly, so that the top plate is prevented from overturning. Because the height of the disc surface of the concave disc is changed, the middle part of the concave disc is low, and the periphery of the concave disc is high, if the concave disc is matched with the length of the guide groove on the guide sleeve, the orthogonal damping mechanism also has a reliable horizontal limiting function.
5. The orthogonal damping mechanism can decompose any horizontal relative motion between the top plate and the bottom plate into two orthogonal linear motions, and then the lead screw, the driving nut and the damper are utilized to apply damping to each component motion, namely the relative sliding of the slide block and the guide rail, so that the damping size can be adjusted by changing the screw pitch of the lead screw or replacing the damper, and the orthogonal damping mechanism is simple and flexible; because of the damping mechanism, the universal ball and the concave disc do not need to be subjected to damping design, and the manufacturing and assembling difficulty of the device is low.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the damping-adjustable friction pendulum type cultural relic seismic isolation device;
FIG. 2 is a side view of the adjustable damping friction pendulum type cultural relic seismic isolation device of the invention;
FIG. 3 is a schematic view of the installation of the concave disc on the base plate;
FIG. 4 is a schematic view of the mounting relationship of the universal ball on the top plate;
FIG. 5 is a schematic structural view of an orthogonal damping mechanism;
FIG. 6 is a schematic structural view of a lower screw damping assembly;
FIG. 7 is a schematic structural view of the upper screw damping assembly;
FIG. 8 is a schematic structural view of a guide sleeve;
FIG. 9 is a schematic structural view of a guide shaft;
FIG. 10 is a schematic view of a nut holder;
FIG. 11 is a schematic structural view of a pin;
FIG. 12 is a schematic structural diagram of a gimbal ball support;
FIG. 13 is a schematic structural view of a gimbaled ball;
fig. 14 is a schematic structural view of the screw support seat.
The device comprises a base plate 1, a top plate 2, a concave disc 3, a universal ball 4, an orthogonal damping mechanism 5, a universal ball support 6, an upper screw damping assembly 7, a lower screw damping assembly 8, a mounting plate 9, a screw 10, a pin shaft 11, a guide shaft 12, a damper 13, a guide rail 14, a slide block 15, a driving nut 16, a screw support 17, a guide sleeve 18 and a nut support 19.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
As shown in attached figures 1 and 2, the invention provides a friction pendulum type cultural relic vibration isolation device with adjustable damping, which comprises a bottom plate 1, a top plate 2, a concave disc 3, a universal ball 4, an orthogonal damping mechanism 5 and a universal ball support 6.
As shown in fig. 3 and 4, four concave discs 3 and four universal balls 4 are fixed on the opposite surfaces of the bottom plate 1 and the top plate 2, respectively, wherein the universal balls 4 are fixed on the top plate through universal ball supports 6, and the structures of the universal balls 4 and the universal ball supports 6 are shown in fig. 13 and 12. An orthogonal damping mechanism 5 is arranged on the bottom plate 1 and the top plate 2, the bottom plate 1 and the top plate 2 are connected together through the orthogonal damping mechanism 5, and the concave disc 3 and the universal ball 4 are in contact fit; the bottom plate 1 and the top plate 2 decompose any horizontal seismic shock wave into two orthogonal directions of motion and apply damping under the action of the orthogonal damping mechanism 5.
As shown in fig. 5, the orthogonal damping mechanism 5 includes an upper screw damping assembly 7 and a lower screw damping assembly 8 which are in a cross orthogonal layout, the upper screw damping assembly 7 and the lower screw damping assembly 8 are connected by hole-shaft matching, a degree of freedom of movement along the axis direction of the hole shaft is provided between the upper screw damping assembly 7 and the lower screw damping assembly 8, and the upper screw damping assembly 7 and the lower screw damping assembly 8 also have a degree of freedom of movement along the direction perpendicular to the axis direction of the hole shaft.
As shown in fig. 7, the upper screw damping assembly 7 includes a mounting plate 9, a screw 10, a damper 13, a guide rail 14, a slider 15, a driving nut 16, a guide sleeve 18, a nut support 19 and a screw support seat 17;
the slide block 15 is in sliding fit with a guide rail 14 fixed on the mounting plate 9, the upper surface of the slide block 15 is fixedly connected with a guide sleeve 18, as shown in fig. 8, half of the guide sleeve 18 is of a flange structure, and the other half of the guide sleeve is of a hollow circular sleeve, the flange structure is used for being connected with the surface of the slide block 15, and a strip-shaped guide groove is formed in the hollow circular sleeve; the lead screw 10 and the guide rail 14 are arranged on the mounting plate 9 in parallel, two ends of the lead screw 10 are supported by a lead screw supporting seat 17 fixed on the mounting plate 9, as shown in fig. 14, the bottom of the lead screw supporting seat 17 is of a flange structure for realizing fixed connection with the mounting plate 9, the upper part of the lead screw supporting seat 17 is provided with a mounting hole for mounting a damper 13, the damper 13 mounted in the lead screw supporting seat 17 is connected with one end or two ends of the lead screw 10, the lead screw 10 is simultaneously matched with a driving nut 16 in a nut support 19, the nut support 19 is fixedly connected with a slider 15, as shown in fig. 10, two ends of the nut support 19 are provided with two mounting holes for driving nuts, the upper surface and the lower surface of the middle section of the nut support are respectively provided with a rectangular clamping groove, the clamping groove on the lower surface is used for; the screw 10, the drive nut 16 and the damper 13 together damp the movement of the slide 15 on the guide rail 14.
As shown in fig. 6, the lower screw damping assembly 8 includes a mounting plate 9, a screw 10, a damper 13, a guide rail 14, a slider 15, a driving nut 16, a pin 11, a guide shaft 12, a nut support 19 and a screw support seat 17;
Go up lead screw damping subassembly 7 and lead screw damping subassembly 8 and form the hole axle cooperation through guide sleeve 18 and guiding axle 12, round pin axle 11 passes the guide way on guide sleeve 18 and the radial hole on the guiding axle 12 simultaneously, and the restriction goes up lead screw damping subassembly 7 and 8 circumferential degrees of freedom of lead screw damping subassembly down to link together last lead screw damping subassembly 7 and lead screw damping subassembly 8 down, and then prevent that roof 2 and bottom plate 1 from breaking away from the toppling, reinforcing means's anti-drawing ability.
The working principle is as follows: when the earthquake acting force exceeds the static friction force of the device, the horizontal motion of the ground causes the universal ball 4 to slide in the cambered surface of the concave disc 3, the top plate and the object can be slightly lifted, and then the universal ball 4 moves towards the initial position, namely the lowest part of the cambered surface, under the action of gravity, so that the reciprocating motion is carried out. As the vibration energy continues to be absorbed, the gimbaled ball 4 eventually comes to rest at the initial position. The orthogonal damping mechanisms 5 connected with the top plate and the bottom plate can also generate relative movement along with the top plate and the bottom plate, and any horizontal seismic shock wave is decomposed into two motions in the orthogonal directions, namely, the slide blocks 15 in the upper lead screw damping assembly 7 and the lower lead screw damping assembly 8 respectively slide relative to the corresponding guide rails 14. The nut support 19 and the driving nut 16 connected with the slide block 15 move along with the slide block, the driving nut 16 can drive the screw rod 10 to rotate, and then the damper 13 arranged at the end part is driven to realize energy absorption and shock absorption, and the adjustment of the damping size is realized by changing the screw pitch of the screw rod 10 or the model of the damper 13.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A friction pendulum type cultural relic shock isolation device with adjustable damping is characterized by comprising a bottom plate, a top plate, a concave disc, a universal ball and an orthogonal damping mechanism;
a concave disc and a universal ball are respectively fixed on the opposite surfaces of the bottom plate and the top plate, and the concave disc and the universal ball are in contact fit to provide supporting force; an orthogonal damping mechanism is arranged between the bottom plate and the top plate, and the bottom plate and the top plate are connected together through the orthogonal damping mechanism; the orthogonal damping mechanism decomposes any horizontal relative motion between the bottom plate and the top plate into two self-orthogonal motions and applies damping.
2. The friction pendulum type cultural relic vibration isolation device with adjustable damping as claimed in claim 1, wherein the orthogonal damping mechanism comprises an upper screw rod damping assembly and a lower screw rod damping assembly, the upper screw rod damping assembly and the lower screw rod damping assembly are connected through hole-shaft matching, the upper screw rod damping assembly and the lower screw rod damping assembly have a degree of freedom of movement along the axial direction of the hole shaft so as to adapt to height changes of the universal ball generated in the concave disc movement process, and the upper screw rod damping assembly and the lower screw rod damping assembly respectively have a degree of freedom of movement along the direction perpendicular to the axial direction of the hole shaft.
3. The adjustable-damping friction pendulum type cultural relic vibration isolation device as claimed in claim 2, wherein said upper screw damping assembly comprises a mounting plate, a screw support base, a damper, a guide rail, a slide block, a drive nut, a guide sleeve and a nut support base;
the sliding block is in embedded fit with the guide rail fixed on the mounting plate, and only the degree of freedom along the direction of the guide rail is arranged between the sliding block and the guide rail; the upper surface of the sliding block is fixedly connected with a guide sleeve, and a strip-shaped guide groove is formed in the guide sleeve; the lead screw and the guide rail are arranged on the mounting plate in parallel, two ends of the lead screw are supported by a lead screw supporting seat fixed on the mounting plate, and the damper is connected with one end or two ends of the lead screw; the screw rod is matched with a driving nut in a nut support, and the nut support is fixedly connected with the sliding block; the lead screw, the drive nut and the damper jointly damp the movement of the slider on the guide rail.
4. The adjustable-damping friction pendulum type cultural relic vibration isolation device as claimed in claim 3, wherein the lower screw rod damping assembly comprises a mounting plate, a screw rod supporting seat, a damper, a guide rail, a slide block, a driving nut, a pin shaft, a guide shaft and a nut support;
the sliding block is in embedded fit with the guide rail fixed on the mounting plate, and only the degree of freedom along the direction of the guide rail is arranged between the sliding block and the guide rail; the upper surface of the sliding block is fixedly connected with a guide shaft, and the top of the guide shaft is provided with a radial through hole which is used for being matched with a pin shaft; the lead screw and the guide rail are arranged on the mounting plate in parallel, two ends of the lead screw are supported by a lead screw supporting seat fixed on the mounting plate, and the damper is connected with one end or two ends of the lead screw; the screw rod is matched with a driving nut in a nut support, and the nut support is fixedly connected with the sliding block; the lead screw, the drive nut and the damper jointly damp the movement of the slider on the guide rail.
5. The friction pendulum type cultural relic vibration isolation device with adjustable damping as claimed in claim 4, wherein the upper screw rod damping assembly and the lower screw rod damping assembly form a hole shaft fit with the guide shaft through the guide sleeve, and the pin shaft simultaneously passes through the guide groove on the guide sleeve and the radial hole on the guide shaft, so that not only is the circumferential freedom degree of the upper screw rod damping assembly and the lower screw rod damping assembly limited, but also the movement amount of the upper screw rod damping assembly and the lower screw rod damping assembly in the axial direction of the hole shaft is limited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010862451.1A CN111963609A (en) | 2020-08-25 | 2020-08-25 | Damping-adjustable friction pendulum type cultural relic shock isolation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010862451.1A CN111963609A (en) | 2020-08-25 | 2020-08-25 | Damping-adjustable friction pendulum type cultural relic shock isolation device |
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| Publication Number | Publication Date |
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| CN111963609A true CN111963609A (en) | 2020-11-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010862451.1A Pending CN111963609A (en) | 2020-08-25 | 2020-08-25 | Damping-adjustable friction pendulum type cultural relic shock isolation device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555319A (en) * | 2020-12-01 | 2021-03-26 | 故宫博物院 | Cultural relic shock isolation device suitable for whole-body showcase |
| CN113339447A (en) * | 2021-06-17 | 2021-09-03 | 南京工程学院 | Mechanical vibration isolation device |
| CN113847382A (en) * | 2021-08-24 | 2021-12-28 | 故宫博物院 | Friction pendulum type shock isolation device with variable damping performance |
| CN114233809A (en) * | 2021-09-10 | 2022-03-25 | 重庆大学 | Self-balancing type shock insulation support |
| CN115217230A (en) * | 2022-06-28 | 2022-10-21 | 华能澜沧江水电股份有限公司 | Shape memory alloy damper |
-
2020
- 2020-08-25 CN CN202010862451.1A patent/CN111963609A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555319A (en) * | 2020-12-01 | 2021-03-26 | 故宫博物院 | Cultural relic shock isolation device suitable for whole-body showcase |
| CN112555319B (en) * | 2020-12-01 | 2022-07-26 | 故宫博物院 | Cultural relic shock isolation device suitable for whole-body showcase |
| CN113339447A (en) * | 2021-06-17 | 2021-09-03 | 南京工程学院 | Mechanical vibration isolation device |
| CN113339447B (en) * | 2021-06-17 | 2022-06-03 | 南京工程学院 | Mechanical vibration isolation device |
| CN113847382A (en) * | 2021-08-24 | 2021-12-28 | 故宫博物院 | Friction pendulum type shock isolation device with variable damping performance |
| CN114233809A (en) * | 2021-09-10 | 2022-03-25 | 重庆大学 | Self-balancing type shock insulation support |
| CN115217230A (en) * | 2022-06-28 | 2022-10-21 | 华能澜沧江水电股份有限公司 | Shape memory alloy damper |
| CN115217230B (en) * | 2022-06-28 | 2023-08-08 | 华能澜沧江水电股份有限公司 | Shape memory alloy damper |
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