CN112178104A - Rapid Assembly length self-adaptation type eddy current damper - Google Patents
Rapid Assembly length self-adaptation type eddy current damper Download PDFInfo
- Publication number
- CN112178104A CN112178104A CN202011235582.3A CN202011235582A CN112178104A CN 112178104 A CN112178104 A CN 112178104A CN 202011235582 A CN202011235582 A CN 202011235582A CN 112178104 A CN112178104 A CN 112178104A
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- China
- Prior art keywords
- eddy current
- length
- adaptive
- damper
- current damper
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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
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
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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
Abstract
The invention belongs to the technical field of vibration control of civil engineering structures, and discloses a quick-assembly length self-adaptive eddy current damper. The designed connecting plate component has simple structure and strong applicability, and can realize the quick assembly of the damper and the controlled structure; the length of the whole damper device can be controlled by adjusting the initial position and the length of the sliding rod, and the damper device is suitable for various practical projects; the energy consumption efficiency can be improved by adjusting the amplification factor of the two-time mechanical transmission, increasing the number of rotary eddy current damping generators, increasing the diameter of a turntable, increasing the magnetic field intensity of a magnet and the like; the permanent magnet is adopted to provide a continuous magnetic field source, external energy sources are not needed, and a long-term stable vibration reduction effect can be generated; the magnetic conduction material is adopted, so that magnetic leakage of a magnetic circuit can be effectively avoided, the eddy current damping efficiency is improved, and the influence on various surrounding components is avoided; the invention is easy to assemble and disassemble, adjustable in length, high in energy consumption efficiency, reusable and wide in application prospect.
Description
Technical Field
The invention belongs to the technical field of vibration control of civil engineering structures, and particularly relates to an eddy current damper capable of being quickly mounted and dismounted.
Background
At present, a damper in the field of civil engineering is generally suitable for a permanent structure, and the vibration control research on a temporary building structure and a building structure is less. The damper is particularly suitable for reducing wind and mechanical vibrations in temporary and under-construction structures, which require a short vibration control period compared to permanent structures, but have higher demands on vibration control efficiency and installation convenience. The electric eddy current damper works based on the principle that the movement of a conductor in a magnetic field generates an electric eddy current effect, when the eddy current is generated, the magnetic field can generate a damping force on the conductor to prevent the movement of the conductor, and the eddy current generated in the conductor is dissipated into a surrounding medium in the form of heat energy. Therefore, the eddy current damper continuously converts the kinetic energy transmitted by the vibration source into eddy current in the conductor and converts the eddy current into heat energy to achieve the purposes of energy consumption and vibration reduction, and the eddy current damper has the characteristics of simple structure, no contact, no abrasion, no need of working medium, long service life, controllable damping and the like. In order to reduce wind vibration and mechanical vibration of an engineering structure, the invention provides a self-adaptive damper with a quick assembly length based on eddy current effect energy consumption.
Disclosure of Invention
The invention provides a fast-assembly length self-adaptive damper for controlling wind vibration and mechanical vibration of a temporary building structure and a building structure.
The technical scheme of the invention is as follows:
a fast-assembly length self-adaptive eddy current damper comprises a cylindrical hollow body 1, a transmission assembly, a rotary eddy current damping generator, a bearing 14, a ball, a fixing pin 15, a bolt 8 and a connecting plate assembly;
the cylindrical hollow body 1 and the cover plate 2 are connected through a bolt 8, and the cylindrical hollow body and the cover plate form a shell of the damping device;
the transmission assembly comprises a sliding rod 3 which penetrates through the cylindrical hollow body 1 and moves axially, a nut 4 which is fixed on the cylindrical hollow body 1 through a ball and moves rotationally, and a rotating shaft 5 which is fixed on the cover plate 2 and the partition plate 17 through a bearing 14 and moves rotationally; the axial movement of the slide bar 3 drives the nut 4 to rotate, so as to realize the first transmission; the rotation of the nut 4 drives the rotation of the rotating shaft 5, and the rotating shafts of the nut and the rotating shaft are vertical to realize secondary transmission;
the rotary eddy current damping generator comprises two groups of permanent magnet groups 6 and copper sheets 7 which are arranged on two sides of a nut 4 in parallel, wherein two magnetic poles of the permanent magnet groups 6 are respectively fixed on a cover plate 2 and a partition plate 17, the copper sheets 7 are fixed on a rotating shaft 5 and rotate with the rotating shaft to cut magnetic induction lines, and the sections of the permanent magnets are circular;
the connecting plate assembly comprises a U-shaped slotted steel plate 18 and a straight slotted steel plate 19 with screws, wherein the four screws move along the straight slots of the straight slotted steel plate 19, but the roots of the screws cannot slide out of the straight slots; the slotted steel plate 19 is provided with a pin connecting hole for connecting with a damper, and the controlled structure is clamped between the U-shaped slotted steel plate 18 and the slotted steel plate 19.
In order to prevent the permanent magnet group 6 from sliding, fixing pins 15 are respectively arranged on the inner sides of the permanent magnet group, so that sufficient rotating clearance of the copper sheets 7 is ensured.
If the controlled structure is a circular section, a cushion block is added between the steel plate and the structure for fixing.
The length of the fast-assembly length self-adaptive eddy current damper is realized by adjusting the initial position and the length of the sliding rod 3; the stroke of the sliding rod 3 is controlled by the sliding rod 3 and the connecting rod 16, wherein a gap is arranged in the middle of the connecting rod 16, and the sliding rod 3 is ensured to have enough displacement space.
The whole device is made of magnetic conductive materials, and the ball is a spherical steel ball.
The screws attached to the slotted steel plates 19 in the shape of a straight line in the connecting plate component are integrated with the steel plates.
The working principle of the invention is as follows:
after the sliding rod of the damper is connected with two points of relative vibration of the connecting rod and the controlled structure, when the structure vibrates, the sliding rod is forced to do axial reciprocating motion, and the motion drives the nut and the rotating shaft to rotate, so that the copper sheet rotates between the permanent magnets. From lenz's law, the copper sheet is subjected to a force that inhibits its movement. This is because the motional electromotive force is generated in the copper sheet, the electric charge movement forms the electric eddy current, the electric eddy current is subjected to the lorentz force, and the direction is always opposite to the movement direction of the copper sheet, thereby forming the resistance, namely the electric eddy current damping force. Meanwhile, due to the heat effect of the current, a part of vibration energy is converted into heat energy, so that the vibration is reduced.
The invention has the beneficial effects that:
(1) the damper converts the axial movement of the sliding rod into the rotation of the copper sheet and generates eddy current for energy consumption, the transmission ratio of the damper is controlled by adjusting the specification and the size of a transmission assembly (the sliding rod, the nut and the rotating shaft), the transmission ratio can be greatly improved by two transmission modes, namely the copper sheet with a larger angle can be rotated by shorter sliding rod displacement, and the energy consumption efficiency is greatly improved;
(2) the damper only needs to adjust the position of the sliding rod to control the length of the damper, achieves length self-adaption and is suitable for actual projects with various requirements.
(3) The damper can increase the damping coefficient of the damper by adjusting the mechanical transmission amplification coefficient twice, increasing the number of rotary eddy current damping generators, increasing the diameter of a turntable, increasing the magnetic field intensity of a magnet and the like, and is suitable for manufacturing various types of dampers in large, medium and small sizes.
(4) The two-time transmission mode adopted by the damper is standard mechanical transmission, so that the damper can be easily produced in a standardized batch mode.
(5) The damper adopts a magnetic conductive material, so that magnetic leakage of a magnetic circuit can be effectively avoided, the eddy current damping efficiency is improved, and the influence on various surrounding components is avoided;
(6) the damper can achieve the purposes of excellent control effect and limited space size by controlling the diameter and the number of the discs, and has strong applicability;
(7) the damper is provided with a connecting plate component which is convenient for construction, has simple structure, convenient assembly and disassembly and can be repeatedly used, and is particularly suitable for structures needing temporary vibration control, such as temporary building structures, under-construction structures and the like;
(8) the damper is suitable for reducing wind vibration and mechanical vibration of temporary and under-construction structures, and can also be applied to vibration control of permanent structures.
Drawings
FIG. 1 is an overall three-dimensional view of a fast-assembly length adaptive eddy current damper according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of a fast-assembly, length-adaptive eddy current damper according to an embodiment of the present invention;
FIG. 3 is a sectional view taken along line B-B of a fast-assembly length adaptive eddy current damper according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a quick-assembly, length-adaptive eddy current damper according to an embodiment of the present invention;
FIG. 5 is an overall three-dimensional view of another embodiment of a rapid-assembly, length-adaptive eddy current damper according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a connecting plate assembly for a fast assembly length adaptive eddy current damper according to an embodiment of the present invention;
in the figure: 1, a cylindrical hollow body; 2, covering a plate; 3, a sliding rod; 4, a nut; 5, rotating a shaft; 6 permanent magnet group; 7 copper sheets; 8, bolts; 9 balls a; 10 balls b; 11 balls c; 12 balls d; 13 balls e; 14 bearings; 15 fixing pins; 16 connecting rods; 17 a partition plate; 18 'U' shaped slotted steel plate; 19I-shaped slotted steel plates.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, an embodiment of a fast assembly length adaptive eddy current damper according to the present invention includes a cylindrical hollow body 1, a cover plate 2, a sliding rod 3, a nut 4, a rotating shaft 5, a permanent magnet set 6, a copper sheet 7, a bolt 8, a ball a9, a ball b10, a ball c11, a ball d12, a ball e13, a bearing 14, a fixing pin 15, a connecting rod 16, and a partition 17.
In the present embodiment, the cylindrical hollow body 1 and the cover plate 2 are connected by means of bolts 8, which constitute the outer shell of the entire damping device;
when the structure vibrates, the sliding rod 3 can be driven to axially slide, the nut 4 is driven to rotate around the horizontal shaft by the movement, the rotating shaft 5 with the gear is driven to rotate around the vertical shaft by the threads on the right surface of the middle position of the nut 4, the rotating shafts of the nut 4 and the rotating shaft 5 are mutually vertical, the copper sheet 7 is fixed on the rotating shaft 5 and rotates along with the rotation of the rotating shaft 5, and magnetic induction lines are cut between the permanent magnet groups 6.
The nut 4 is connected to the cylindrical hollow body through balls a and b, and is connected to the partition 17 through balls c, d, and e to ensure stability and smoothness of rotation.
The rotating shaft 15 is connected with the partition board 17 and the cover board 2 through the bearing 14, the copper sheet 7 is fixed on the rotating shaft 5 and rotates along with the rotation of the rotating shaft 5, and the rotating shaft 15 penetrates through the cover board 2 and the partition board 17.
A pair of permanent magnet groups 6 with opposite magnetism are annular and are respectively fixed on the cover plate 2 and the partition plate 17 through adhesives, in order to prevent the permanent magnets from slightly moving in work, a fixing pin 15 is arranged on the inner side of each permanent magnet group 6, the fixing pin 15 is connected with the cylindrical hollow body 1, and a sufficient rotating gap is reserved between each permanent magnet group 6 and the corresponding rotating copper sheet 7.
According to the invention, the axial movement of the sliding rod 3 is converted into the rotation of the copper sheet 7 through two times of mechanical transmission, and eddy current is generated for energy consumption, the copper sheet 7 is amplified in a manner of adjusting the amplification coefficient of the two times of mechanical transmission, the copper sheet 7 with a larger angle can be rotated by a shorter displacement of the sliding rod 3, and the energy consumption efficiency is greatly improved; the damping parameters can be adjusted by adjusting the magnetic field intensity of the permanent magnet group 6, the thickness of the copper sheet 7 and the distance between the copper sheet 7 and the permanent magnet group 6; the permanent magnet group 6 is adopted to provide a continuous magnetic field source, external energy sources are not needed, and a long-term stable vibration reduction effect can be generated; the magnetic conductive material is adopted, so that magnetic leakage of a magnetic circuit can be effectively avoided, the eddy current damping efficiency is improved, and the influence on various surrounding components is avoided.
Referring to fig. 5, in another embodiment of the fast assembling length adaptive eddy current damper according to the present invention, the slide rods 3 with suitable lengths are manufactured according to actual engineering requirements, the number of the cylindrical hollow bodies 1 and the internal devices thereof can also be configured independently to meet the requirements of energy consumption efficiency and space size, and fig. 5 shows that 5 dampers are connected in series and function simultaneously.
Referring to fig. 6, in the connecting plate assembly for quickly assembling the length adaptive eddy current damper according to the embodiment of the present invention, the connecting plate assembly has a simple structure and high applicability, and can quickly assemble the main body damper.
Attention is required in designing the present invention: firstly, the diameter of a turntable of the damper and the number of rotary eddy current damping generators are reasonably valued according to the vibration strength of the structure; secondly, the first transmission mode can be sliding screw transmission, rolling screw transmission, static pressure screw transmission and other all generalized screw transmission modes; thirdly, the whole device is made of magnetic conductive materials, the balls are spherical steel balls, all the balls are coated with lubricating oil to reduce friction and facilitate rolling, and the size and the number of the balls can be adjusted according to requirements; .
The above-described embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and various other modifications, substitutions and alterations can be made to the above-described structure of the present invention without departing from the basic technical concept of the present invention as described above, according to the common technical knowledge and conventional means in the field of the present invention.
Claims (10)
1. A fast-assembly length self-adaptive eddy current damper is characterized by comprising a cylindrical hollow body (1), a transmission assembly, a rotary eddy current damping generator, a bearing (14), a ball, a fixing pin (15), a bolt (8) and a connecting plate assembly;
the cylindrical hollow body (1) is connected with the cover plate (2) through a bolt (8), and the cylindrical hollow body and the cover plate form a shell of the damping device;
the transmission assembly comprises a sliding rod (3) which penetrates through the cylindrical hollow body (1) and moves axially, a nut (4) which is fixed on the cylindrical hollow body (1) through a ball and moves rotationally, and a rotating shaft (5) which is fixed on the cover plate (2) and the partition plate (17) through a bearing (14) and moves rotationally; the axial movement of the sliding rod (3) drives the nut (4) to rotate, so that the first transmission is realized; the rotation of the nut (4) drives the rotation of the rotating shaft (5), and the rotating shafts of the nut and the rotating shaft are vertical to realize secondary transmission;
the rotary eddy current damping generator comprises two groups of permanent magnet groups (6) and copper sheets (7) which are arranged on two sides of a nut (4) in parallel, wherein two magnetic poles of the permanent magnet groups (6) are respectively fixed on a cover plate (2) and a partition plate (17), the copper sheets (7) are fixed on a rotating shaft (5) and rotate along with the rotating shaft to cut a magnetic induction line, and the sections of the permanent magnets are circular;
the connecting plate assembly comprises a U-shaped slotted steel plate (18) and a straight slotted steel plate (19) with screws, the four screws move along the straight slots of the straight slotted steel plate (19), but the roots of the screws cannot slide out of the straight slots; the slotted steel plate (19) is provided with a pin connecting hole for connecting with a damper, and the controlled structure is clamped between the U-shaped slotted steel plate (18) and the slotted steel plate (19).
2. The eddy current damper of the quick assembly length adaptive type as claimed in claim 1, wherein in order to prevent the permanent magnet group (6) from slipping, fixing pins (15) are respectively provided at the inner sides thereof to ensure sufficient rotational clearance of the copper sheet (7).
3. The eddy current damper of quick assembly length adaptation type as claimed in claim 1 or 2, wherein if the controlled structure is a circular section, a spacer is added between the steel plate and the structure for fixation.
4. The rapid assembly length adaptive eddy current damper according to claim 1 or 2, wherein the length of the rapid assembly length adaptive eddy current damper is achieved by adjusting the initial position and length of the slide bar (3); the stroke of the sliding rod (3) is controlled by the sliding rod (3) and the connecting rod (16), wherein a gap is arranged in the middle of the connecting rod (16), and the sliding rod (3) is ensured to have enough displacement space.
5. The rapid assembly length adaptive eddy current damper according to claim 3, wherein the length of the rapid assembly length adaptive eddy current damper is achieved by adjusting the initial position and length of the slide bar (3); the stroke of the sliding rod (3) is controlled by the sliding rod (3) and the connecting rod (16), wherein a gap is arranged in the middle of the connecting rod (16), and the sliding rod (3) is ensured to have enough displacement space.
6. The eddy current damper with adaptive rapid assembly length as claimed in claim 1, 2 or 5, wherein the whole device is made of magnetic conductive material and the balls are ball-shaped steel balls.
7. The eddy current damper with adaptive length for rapid assembly according to claim 3, wherein the whole device is made of magnetic conductive material and the balls are ball-shaped steel balls.
8. The eddy current damper with adaptive rapid assembly length as claimed in claim 4, wherein the whole device is made of magnetic conductive material and the balls are ball-shaped steel balls.
9. The eddy current damper of the rapid assembly length adaptive type as claimed in claim 1, 2, 5, 7 or 8, wherein the slotted steel plate (19) of the connecting plate assembly is integrally formed with screws attached thereto.
10. The eddy current damper with adaptive length for rapid assembly according to claim 6, wherein the slotted steel plate (19) in the shape of a straight line in the connecting plate assembly is provided with screws integral with the steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011235582.3A CN112178104A (en) | 2020-11-06 | 2020-11-06 | Rapid Assembly length self-adaptation type eddy current damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011235582.3A CN112178104A (en) | 2020-11-06 | 2020-11-06 | Rapid Assembly length self-adaptation type eddy current damper |
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| CN112178104A true CN112178104A (en) | 2021-01-05 |
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| CN202011235582.3A Pending CN112178104A (en) | 2020-11-06 | 2020-11-06 | Rapid Assembly length self-adaptation type eddy current damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803395A (en) * | 2021-09-30 | 2021-12-17 | 北京筑信润捷科技发展有限公司 | Eddy current damper of rotating mechanism |
-
2020
- 2020-11-06 CN CN202011235582.3A patent/CN112178104A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803395A (en) * | 2021-09-30 | 2021-12-17 | 北京筑信润捷科技发展有限公司 | Eddy current damper of rotating mechanism |
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