CN119435634B - Damper with parallel rotary eddy current damping device - Google Patents
Damper with parallel rotary eddy current damping device Download PDFInfo
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- CN119435634B CN119435634B CN202510045147.0A CN202510045147A CN119435634B CN 119435634 B CN119435634 B CN 119435634B CN 202510045147 A CN202510045147 A CN 202510045147A CN 119435634 B CN119435634 B CN 119435634B
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- 238000013016 damping Methods 0.000 title claims abstract description 123
- 239000004020 conductor Substances 0.000 claims abstract description 88
- 230000000670 limiting effect Effects 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 18
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000004308 accommodation Effects 0.000 claims 3
- 238000005096 rolling process Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000001629 suppression Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 10
- 230000009471 action Effects 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 9
- 238000013461 design Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
- F16F15/035—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means by use of eddy or induced-current damping
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention discloses a damper with a parallel rotary eddy current damping device, which comprises a mounting seat, a mass block group, a screw rod, a first damping disc, a magnet rotating disc and a plurality of second damping discs, wherein the mounting seat comprises a bottom plate and a plurality of upright posts, the mass block group is supported on the bottom plate through a plurality of elastic elements and is in sliding connection with the upright posts along the height direction, the screw rod is fixed on the bottom surface of the mass block group, the first damping disc comprises a first conductor plate which is fixed in the middle of the bottom plate through a support frame, the magnet rotating disc is arranged right below the first conductor plate in parallel, nuts sleeved on the screw rod penetrate through the first conductor plate and are fixedly connected with the magnet driving disc, and the second damping discs are supported at the bottom of the magnet rotating disc at intervals along the circumferential direction of the magnet rotating disc, and any second damping disc is a rolling rotary eddy current damping device. According to the invention, the first damping disc and the second damping disc jointly provide damping force, so that the energy consumption density of the damper is remarkably improved under the condition that the space size of the damper is not changed, the inertial coefficient and the damping efficiency are improved, and the vibration suppression effect is ensured.
Description
Technical Field
The invention relates to the technical field of vibration control. More particularly, the present invention relates to a damper with parallel rotary eddy current damping devices.
Background
The tuned mass damper (Tuned MASS DAMPER, TMD for short) has been widely used in vibration control of various building structures and bridge engineering by virtue of its high-efficiency single-mode vibration damping performance, and has remarkable vibration suppression effect. The energy dissipation elements of the TMD are mainly of two types, namely viscous damping devices and eddy current damping devices. The viscous damping device is easy to leak liquid, has low durability, is difficult to adjust later damping parameters and the like under the action of long-time reciprocating load, and has obvious potential safety hazards. The eddy current damping device adopts a non-contact electromagnetic induction principle, does not depend on mechanical friction energy consumption, does not have working fluid, does not have the problems of liquid leakage and sealing, has the advantages of high reliability, good durability, relatively simple structure and the like, and is particularly suitable for working environments which are required to have long fatigue life and are difficult to maintain. At present, the structural form of the eddy current damping device generally comprises a relative motion type, a plate type and a ball screw-based rotary type, the damping coefficient which can be provided by the eddy current damping device in the former two types is relatively low, the requirement of a large-scale engineering structure on damping force is difficult to meet, the eddy current damping device which converts the linear motion of a mass block into rotary motion by adopting a ball screw pair transmission system can improve the energy consumption efficiency to a certain extent, but the efficiency index is still limited by the lead and the integral axial dimension of the ball screw pair, and the defects of low inertia coefficient, low assembly degree, low utilization rate of the internal space of the device under the same external shape volume and the like exist, so that the applicability of the eddy current damping device in practical construction is limited to a great extent.
In order to solve the above problems, it is necessary to design a damper with a parallel rotary eddy current damping device, which improves the energy consumption density of the damper, ensures the vibration control effect, and improves the applicability of the damper under different working environments, and the range and fine classification of damping adjustment.
Disclosure of Invention
The invention aims to provide a damper with a parallel rotary eddy current damping device, damping force is provided by a first damping disc and a second damping disc together, the utilization rate of the internal space of the damper is obviously improved under the condition that the lead and the overall axial dimension of a ball screw pair in a conventional eddy current damping device are not changed, the inertial coefficient and the damping efficiency are improved, and the vibration suppression effect is ensured.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a damper with a parallel rotary eddy current damping device, comprising:
the mounting seat comprises a bottom plate, a plurality of upright posts, a plurality of support plates and a plurality of support plates, wherein the upright posts are arranged around the top surface of the bottom plate at intervals along the circumferential direction of the bottom plate;
the mass block group is matched and clamped among the upright posts and is connected with the upright posts in a sliding manner along the height direction;
The elastic elements are supported around the bottom surface of the mass block group at intervals along the circumferential direction of the mass block group, one end of any elastic element is fixedly connected with the mass block group, and the other end of any elastic element is vertically and downwards fixedly connected with the bottom plate;
The screw rod is vertically fixed in the middle of the bottom surface of the mass block group, and the nut is sleeved on the screw rod and is in threaded connection with the screw rod in a matched manner;
The magnetic rotating disc is arranged right below the first conductor plate in parallel, vertical through holes coaxial with the screw rods are formed in the middle of the first conductor plate and the middle of the magnetic rotating disc, and nuts are arranged in the two vertical through holes in a penetrating mode and fixedly connected with the magnetic transmission disc;
The two second conductor plates are oppositely arranged at two sides of the magnet roller through a rotating shaft and are rotationally connected with the magnet roller, the rotating shaft is arranged along the radial direction of the magnet rotating disc, and the two second conductor plates are fixedly connected with the bottom surface of the magnet rotating disc through a connecting mechanism.
Preferably, the damper with parallel rotary eddy current damping device comprises a box body, a plurality of partition plates, a first mass block, a plurality of second mass blocks and a plurality of second mass blocks, wherein the box body is of a hollow structure with an opening at the top, the partition plates are arranged in the box body and divide the upper space of the box body into a plurality of accommodating cavities, the accommodating cavities are identical in size and located at the same height position, the first mass block is fixed in the lower space of the box body, the second mass blocks are arranged in the accommodating cavities, and any one of the second mass blocks is matched with the cross section shape of the accommodating cavity.
Preferably, the damper with parallel rotary eddy current damping device, the mounting seat further comprises a plurality of guide rails which are arranged corresponding to the plurality of upright posts, any guide rail is fixed on the side wall adjacent to the corresponding upright post and the mass block group along the height direction, and a plurality of sliding blocks which are arranged corresponding to the plurality of guide rails one by one, and any sliding block is fixed on the outer side wall of the mass block group and is matched and slidingly connected with the corresponding guide rail.
Preferably, the damper with parallel rotary eddy current damping device, the connection parts of the elastic element and the mass block group and the bottom plate are respectively and fixedly provided with a limiter, and the end part of the elastic element is matched and sleeved with the corresponding limiter.
Preferably, the damper with parallel rotary eddy current damping device, the support frame comprises a plurality of inverted L-shaped brackets, the inverted L-shaped brackets are arranged at intervals along the circumferential direction of the first conductor plate, the vertical part of any inverted L-shaped bracket is positioned outside the first conductor plate and fixed on the bottom plate, and the horizontal part is fixedly connected with the first conductor plate.
Preferably, the damper with parallel rotary eddy current damping device, the vertical part of the inverted-L bracket is a telescopic mechanism, which is used for adjusting the distance between the first conductor plate and the bottom plate.
Preferably, the damper with parallel rotary eddy current damping device, the connecting mechanism comprises a horizontal plate fixedly connected with the bottom surface of the magnet rotating disc through a connecting rod, a chute parallel to the rotating shaft is arranged at the bottom of the horizontal plate, and the top end of any second conductor plate is hung in the chute and is matched and connected with the chute in a sliding manner;
The rotating shaft comprises a distance adjusting screw, two annular limiting grooves are formed in the middle of the rotating shaft along the circumferential direction, external threads are respectively formed in the two ends of the rotating shaft, magnet rollers are clamped in the annular limiting grooves in a matched mode and are connected with the annular limiting grooves in a rotating mode, two second conductor plates are respectively arranged at the two ends of the distance adjusting screw, any one of the second conductor plates is connected with the distance adjusting screw in a matched sliding mode through middle through holes, two distance adjusting nuts are respectively arranged at the outer sides of the two second conductor plates and are connected with the distance adjusting screw in a matched threaded mode, two compression springs are respectively arranged between the magnet rollers and the two second conductor plates, and any compression spring is sleeved on the distance adjusting screw.
Preferably, the damper with parallel rotary eddy current damping device, the center points of the mass group, the first conductor plate and the magnet rotating disc are all located on the axis of the screw.
The invention at least comprises the following beneficial effects:
1. The invention adds a plurality of second damping disks in the space below the first damping disk, which ensures that the structures of the rolling type rotary eddy current damping device, the magnet rotating disk, the nut and the like all participate in rotation and jointly provide damping force, compared with the prior eddy current damping device, the invention has more compact structural form, under the condition that the lead and the overall axial dimension of a ball screw pair in a conventional eddy current damping device are not changed (the occupied space of a damper is unchanged), the utilization rate of the internal space of the damper is greatly improved, so that the inertia mass and the energy consumption density of the damper are remarkably improved, the inertia coefficient and the damping efficiency are improved, and the vibration suppression effect is ensured;
2. The total damping of the invention is provided by the rotary eddy current damping device (the first damping disc) and the rolling rotary eddy current damping device (the second damping disc), the distance between the magnet rotating disc and the first conductor plate, the distance between the magnet roller and the second conductor plate and the mass of the mass block group can be flexibly adjusted, and superposition of the two damping effects ensures that the whole damper has wider damping adjustment range and finer adjustment grading, is beneficial to accurate design and engineering realization of damping, improves the assembly degree of the damper, ensures that the actual performance parameters and design values of the damper have better consistency, and reduces the installation and operation cost of the damper and realizes the improvement of vibration control efficiency and effect.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of the overall structure of a damper with parallel rotary eddy current damping devices according to one embodiment of the invention;
FIG. 2 is a schematic front elevation view of the damper with parallel rotary eddy current damping device according to the embodiment;
FIG. 3 is a schematic side elevational view of the damper with parallel rotary eddy current damping device according to the above embodiment;
FIG. 4 is a schematic plan view of a damper with parallel rotary eddy current damping devices according to the above embodiment;
Fig. 5 is an exploded view of the damper with the parallel rotary eddy current damping device according to the above embodiment.
Reference numerals illustrate:
1. Mounting seat, 11, bottom plate, 12, upright post, 13, guide rail, 21, elastic element, 22, limiter, 3, first damping disk, 31, first conductor plate, 32, supporting frame, 33, magnet rotating disk, 4, second damping disk, 41, second conductor plate, 42, magnet roller, 43, rotating shaft, 5, connecting mechanism, 51, connecting rod, 52, horizontal plate, 61, screw rod, 62, nut, 7, first mass block, 8, slide block, 9 and second mass block.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It should be noted that, in the following embodiments, unless otherwise specified, the experimental methods are conventional methods, and the reagents and materials are commercially available, unless otherwise specified, and in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
As shown in fig. 1 to 5, the present invention provides a damper with a parallel rotary eddy current damping device, comprising:
the mounting seat comprises a bottom plate, a plurality of upright posts, a plurality of support plates and a plurality of support plates, wherein the upright posts are arranged around the top surface of the bottom plate at intervals along the circumferential direction of the bottom plate;
the mass block group is matched and clamped among the upright posts and is connected with the upright posts in a sliding manner along the height direction;
The elastic elements are supported around the bottom surface of the mass block group at intervals along the circumferential direction of the mass block group, one end of any elastic element is fixedly connected with the mass block group, and the other end of any elastic element is vertically and downwards fixedly connected with the bottom plate;
The screw rod is vertically fixed in the middle of the bottom surface of the mass block group, and the nut is sleeved on the screw rod and is in threaded connection with the screw rod in a matched manner;
The magnetic rotating disc is arranged right below the first conductor plate in parallel, vertical through holes coaxial with the screw rods are formed in the middle of the first conductor plate and the middle of the magnetic rotating disc, and nuts are arranged in the two vertical through holes in a penetrating mode and fixedly connected with the magnetic transmission disc;
The two second conductor plates are oppositely arranged at two sides of the magnet roller through a rotating shaft and are rotationally connected with the magnet roller, the rotating shaft is arranged along the radial direction of the magnet rotating disc, and the two second conductor plates are fixedly connected with the bottom surface of the magnet rotating disc through a connecting mechanism.
In the above technical scheme, the first damping disk, the screw rod and the nut are matched to form a conventional rotary eddy current damping device structure, the second damping disk is supported on the bottom plate in a rolling way and is fixedly connected with the bottom surface of the magnet rotating disk through the connecting mechanism, and the plurality of second damping disks are connected in parallel below the magnet rotating disk through the connecting mechanism to form the rotary eddy current damping device in a rolling way. When the mass block group receives external (vibration) acting force and reciprocates along the height direction under the limit action of the upright post and the elastic action of the elastic element, the screw rod synchronously moves under the action of fixed connection with the mass block group, at the moment, the nut is still supported on the bottom plate under the action of gravity of the magnet rotating plate and the second damping plate (the height position is not changed), and the nut correspondingly rotates clockwise or anticlockwise according to the moving direction of the screw rod, so that the magnet rotating plate is driven to rotate relative to the first conductor plate to cut magnetic induction lines, and then each second damping plate is driven to synchronously rotate, namely, each magnet roller moves circumferentially on the bottom plate along the circumferential direction of the magnet rotating plate, so that the second conductor plates on two opposite sides of the magnet roller rotate to cut the magnetic induction lines. At this time, induced current (eddy current) is generated on the first conductor plate and the second conductor plate, so that a new magnetic field opposite to the original magnetic field is generated, a damping force for preventing the relative motion of the first magnetic field and the second conductor plate is formed between the original magnetic field and the conductor plate, meanwhile, the resistance effect of the conductor plate converts kinetic energy of the conductor plate into heat energy through the eddy current to dissipate the heat energy, so that the motion energy is partially absorbed, and a comprehensive vibration-resistant effect is formed by superposition of damping actions of the first damping plate and the second damping plate.
Specifically, any stand is vertical to be set up on the bottom plate and be connected rather than dismantling, in this embodiment, the four corners department of bottom plate is equipped with the stand respectively, and the quality piece group is monolithic rectangle box structure, stand accessible self structural style just the quality piece group is restrained in the removal of horizontal direction (if carry out spacingly to the box four corners of quality piece group through the L type stand structure of keeping flat), only do vertical removal (vibration) when receiving external effort guaranteeing the quality piece group to damping efficiency and the effect maximize that shakes that restraines in this direction. The elastic element can be a disc spring, a spiral spring, an air spring and other structures. The screw rod and the matched nut convert the vertical vibration of the mass block into the rotation of the magnet rotating disc in the horizontal plane and the rotation of each magnet roller below the magnet rotating disc around the corresponding rotating shaft, the structures of the magnet rollers are the same, the rolling/rotating track is a circle positioned on the top surface of the bottom plate, and the circle center is the projection of the axis of the screw rod on the top surface of the bottom plate. Magnets are distributed on the magnet rotating disc and the magnet roller, and the magnets respectively cut the rotation of magnetic induction lines relative to the first conductor plate with fixed positions and the second conductor plate with rigid motion so as to generate a damping effect. The screw rod can be a ball screw rod, the nut can be a ball nut matched with the ball screw rod, the process of converting the linear vibration into rotation can be smoothly carried out, the energy loss in kinetic energy conversion and the abrasion to the screw rod, the nut and other transmission mechanisms are reduced as much as possible, and the service life of the device is ensured. The connecting mechanism comprises a horizontal plate and a connecting rod, wherein the horizontal plate is fixedly connected with the tops of the two second conductor plates, and the connecting rod is vertically arranged and fixedly connected with the middle part of the top surface of the horizontal plate and the bottom surface of the magnet rotating disc. Therefore, the magnet rotating disc is actually supported on the bottom plate through a plurality of second damping discs in a rotating way, the first conductor plate is fixedly supported on the bottom plate through the supporting frame, and a height difference is formed between the magnet rotating disc and the first conductor plate.
The invention fully utilizes the space below the first damping disk, and simultaneously, a plurality of rolling type rotary eddy current damping devices (second damping disks) are additionally arranged below the first damping disk in parallel without influencing the normal work of the magnet rotating disk and the screw, so that the first damping disk and the second damping disk synchronously rotate and jointly provide damping force, the inertia mass is obviously increased, the inertia coefficient and the damping efficiency are improved, meanwhile, the inertia effect is improved, the effective mass of the damper is increased due to the phase change, the mass ratio of the damper is increased, the vibration control effect is improved, and the vibration suppression effect of the damper under different working conditions is ensured as the vibration frequency of the structure to be suppressed is increased. In addition, the original overall axial size of the damper is not changed, the lead of the ball screw pair is not changed, the utilization rate of the inner space of the damper is greatly improved, the damper is better applicable to different engineering conditions and working environments, and the damper has good and wide application prospects.
In another technical scheme, the damper with the parallel rotary eddy current damping device comprises a box body, a plurality of partition plates, a first mass block, a plurality of second mass blocks and a plurality of second mass blocks, wherein the box body is of a hollow structure with an opening at the top, the partition plates are arranged in the box body and divide the upper space of the box body into a plurality of accommodating cavities, the accommodating cavities are identical in size and located at the same height position, the first mass block is fixed in the lower space of the box body, the second mass block is arranged in the accommodating cavities, and any one of the second mass blocks is matched with the cross section of the accommodating cavity. One or more second mass blocks can be correspondingly arranged in any accommodating cavity, the second mass blocks can be overlapped and fixed in the same accommodating cavity, and the weight of any second mass block is smaller than that of the first mass block. The second mass block is used for finely adjusting the frequency of the damper, when the first mass block is only arranged in the box body under the condition that the arrangement form (number, length and selection) of the elastic elements is unchanged, the damper has the maximum frequency modulation value, and the vibration suppression frequency of the damper is gradually reduced along with adding the second mass block into the box body layer by layer. The specific frequency of the damper may be designed and selected based on the specific application. Specifically, the relationship between damper frequency and mass is:
Wherein f is the damper frequency, k is the elastic element stiffness, and m is the total mass of the mass group. The design structure of the mass block group enables the frequency of the damper to be flexibly, rapidly and conveniently adjusted along with the change of working conditions, and the adaptability and the practicability of the device are improved.
In this embodiment, the plurality of spacers include two spacers, which are respectively disposed along the length and width directions of the case and divide the upper space of the case into four cylindrical accommodating chambers with the same shape and volume along the horizontal direction, and the cross-sectional dimension of the second mass block is adapted to the cylindrical accommodating chambers.
In another technical scheme, the damper with the parallel rotary eddy current damping device further comprises a plurality of guide rails, a plurality of sliding blocks and a plurality of sliding blocks, wherein the guide rails are correspondingly arranged with the plurality of upright posts, any guide rail is fixed on the side wall of the corresponding upright post adjacent to the mass block group along the height direction, the sliding blocks are correspondingly arranged with the plurality of guide rails one by one, and any sliding block is fixed on the outer side wall of the mass block group and is matched and slidingly connected with the corresponding guide rail. In this embodiment, four guide rails and four sliders are provided corresponding to the upright, each slider sliding in the height direction of the upright under the restriction of the corresponding guide rail. Therefore, the stability and the reliability of the limiting effect of the mounting seat on the mass block group are better ensured.
In another technical scheme, the damper with the parallel rotary eddy current damping device is characterized in that limiters are respectively and fixedly arranged at the joints of the elastic element, the mass block group and the bottom plate, and the end parts of the elastic element are matched and sleeved with the corresponding limiters. The limiting device is of a limiting column structure, is vertically arranged and fixed on the bottom surface of the mass block group or the top surface of the bottom plate, the end parts of the elastic elements are fixed on the mass block group or the bottom plate after being matched and sleeved with the limiting device, so that restoring force required by periodic vibration of the mass block group is provided, the limiting device plays a role in guiding and limiting elastic movement of the elastic elements, loss of elastic movement potential energy in the operation of the elastic elements is effectively reduced, and the overall working efficiency of the damper is guaranteed.
In another technical scheme, the damper with the parallel rotary eddy current damping device comprises a plurality of inverted-L-shaped brackets, wherein the inverted-L-shaped brackets are arranged at intervals along the circumferential direction of the first conductor plate, the vertical part of any inverted-L-shaped bracket is positioned at the outer side of the first conductor plate and fixed on the bottom plate, and the horizontal part is fixedly connected with the first conductor plate.
Specifically, the horizontal part of the inverted-L-shaped bracket is arranged along the radial direction of the first conductor plate and fixed on the top surface of the inverted-L-shaped bracket, so that the space right below the first conductor plate is reserved while the stable support of the support frame to the first conductor plate is ensured, the second damping disc can be better installed and rotated, the double damping disc arrangement structure of the damper is more compact and reasonable, the space utilization rate of the design of the damper and the energy consumption density of the damper are further improved, and the damper can be better applied to a working environment with limited space.
In another technical scheme, the damper with the parallel rotary eddy current damping device is characterized in that the vertical part of the inverted-L-shaped bracket is a telescopic mechanism which is used for adjusting the distance between the first conductor plate and the bottom plate.
The rotary type eddy current damping device comprises a magnet rotating disc, a nut, a first conductor plate and a support frame thereof, wherein the rotary type eddy current damping device is formed by the magnet rotating disc, the inverted-L-shaped support is arranged to be of a height-adjustable structure, the adjustment of the magnet spacing between the first conductor plate and the magnet rotating disc can be realized, and further the grading adjustment of the damping of the first damping disc is realized. Meanwhile, the assembly degree of the damper is improved, and the installation and subsequent operation and maintenance costs of the damper are effectively reduced. The telescopic mechanism can be a telescopic cylinder, an electric telescopic rod, an adjusting screw rod and other devices, the horizontal part of the inverted-L-shaped bracket is fixed at the top end of the telescopic mechanism, and when the telescopic mechanism stretches along the length direction, the setting height of the horizontal part relative to the bottom plate also changes at any time, so that the height adjustment of the horizontal part relative to the bottom plate is realized.
In another technical scheme, the damper with the parallel rotary eddy current damping device comprises a horizontal plate, wherein the horizontal plate is fixedly connected with the bottom surface of the magnet rotating disc through a connecting rod, a sliding groove parallel to the rotating shaft is arranged at the bottom of the horizontal plate, and the top end of any second conductor plate is hung in the sliding groove and is matched and connected with the sliding groove in a sliding manner;
The rotating shaft comprises a distance adjusting screw, two annular limiting grooves are formed in the middle of the rotating shaft along the circumferential direction, external threads are respectively formed in the two ends of the rotating shaft, magnet rollers are clamped in the annular limiting grooves in a matched mode and are connected with the annular limiting grooves in a rotating mode, two second conductor plates are respectively arranged at the two ends of the distance adjusting screw, any one of the second conductor plates is connected with the distance adjusting screw in a matched sliding mode through middle through holes, two distance adjusting nuts are respectively arranged at the outer sides of the two second conductor plates and are connected with the distance adjusting screw in a matched threaded mode, two compression springs are respectively arranged between the magnet rollers and the two second conductor plates, and any compression spring is sleeved on the distance adjusting screw.
The magnet roller is relatively fixed at the position of the annular limiting groove in the length direction of the rotating shaft, the distance adjusting nut is arranged on the outer side of the second conductor plate, the compression spring is arranged on the inner side of the second conductor plate, the force balance is achieved under the action of the spring force and the locking force of the distance adjusting nut, when the distance adjusting nut is rotated, the second conductor plate synchronously moves along with the distance adjusting nut under the action of the compression spring and reaches balance again at a new position, the second conductor plate moves linearly along the axial direction of the rotating shaft in the process of sliding relative to the horizontal plate, an embedded connection mode is adopted between the top end of the second conductor plate and the sliding groove, the second conductor plate is always hung at the bottom of the horizontal plate under the limiting action of the sliding groove, namely, the relative sliding of the second conductor plate does not influence the connection action of the connection mechanism on the second conductor plate in the height direction, so that the fine and stable adjustment of the distance between the second conductor plate and the magnet roller are achieved, the multistage continuous adjustable rolling type rotary eddy current damping is further achieved, the installation and subsequent operation cost of the damper is reduced, and the damper can better adapt to different working conditions and the best vibration suppressing effect under the environment.
When the technical scheme of the telescopic mechanism or the distance adjusting screw rod is adopted (namely, the distance between the first conductor plate and the magnet rotating disc or the distance between the second conductor plate and the magnet roller is adjustable), the basic principle of realizing damping grading adjustment by adjusting the distance between the magnet and the corresponding conductor plate is as follows:
existing researches show that the eddy current damping coefficient under certain conditions can be expressed as follows:
wherein v is the relative movement speed of the conductor plate and the magnet, a and B are the length and width of the magnet, t is the thickness of the conductor plate, B is the magnetic induction intensity, and sigma is the conductivity of the conductor plate.
From the magnetic field strength calculation formula, it can be seen that the magnetic induction strength is inversely proportional to the square of the distance from the surface of the magnet, i.e., BR is the distance between the magnet and the corresponding conductor plate. It follows that the eddy current damping coefficient C is inversely proportional to the distance from the magnet surface to the power 4, i.e., C. Obviously, along with the change of the distance between the magnet and the conductor plate, the eddy current damping coefficient C is rapidly changed to the 4 th power of the distance change amount, so that the damping fine grading adjustment of the corresponding damping disc can be realized when the distance between the first conductor plate and the magnet rotating disc and/or the distance between the second conductor plate and the magnet roller are adjusted. In addition, because the total damping of the damper is the superposition of the first damping disk and the plurality of second damping disks, the damping of each damping disk can be alternatively or simultaneously regulated in a grading way according to different damping requirements, so as to meet the requirement of larger range and more accurate damping change.
In another technical scheme, the damper with the parallel rotary eddy current damping device is characterized in that the center points of the mass block group, the first conductor plate and the magnet rotating disc are all positioned on the axis of the screw rod. In the above technical scheme, the screw is fixed in the position of the bottom surface center of the mass block group, the vertical perforations are all arranged at the central position (circle center) of the first conductor plate and the magnet rotating disc, namely, the screw and the nuts are coaxially arranged with the first conductor plate and the magnet rotating disc, and the plurality of second damping discs are uniformly distributed on the bottom surface of the magnet rotating disc by taking the circle center of the magnet rotating disc as the center. Therefore, the internal structure of the damper is further optimized, the rotation synchronism and consistency of each rotating structure are guaranteed, the actual performance of the damper can better meet the design requirements, and the damping precise design is facilitated.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (7)
1. A damper with parallel rotary eddy current damping apparatus, comprising:
the mounting seat comprises a bottom plate, a plurality of upright posts, a plurality of support plates and a plurality of support plates, wherein the upright posts are arranged around the top surface of the bottom plate at intervals along the circumferential direction of the bottom plate;
the mass block group is matched and clamped among the upright posts and is connected with the upright posts in a sliding manner along the height direction;
The elastic elements are supported around the bottom surface of the mass block group at intervals along the circumferential direction of the mass block group, one end of any elastic element is fixedly connected with the mass block group, and the other end of any elastic element is vertically and downwards fixedly connected with the bottom plate;
The screw rod is vertically fixed in the middle of the bottom surface of the mass block group, and the nut is sleeved on the screw rod and is in threaded connection with the screw rod in a matched manner;
the magnetic rotating disc is arranged right below the first conductor plate in parallel, vertical through holes coaxial with the screw rods are formed in the middle of the first conductor plate and the middle of the magnetic rotating disc, and the nuts are arranged in the two vertical through holes in a penetrating mode and fixedly connected with the magnetic rotating disc;
The two second conductor plates are oppositely arranged at two sides of the magnet roller through a rotating shaft and are rotationally connected with the magnet roller, the rotating shaft is arranged along the radial direction of the magnet rotating disc, the two second conductor plates are fixedly connected with the bottom surface of the magnet rotating disc through a connecting mechanism, the connecting mechanism comprises a horizontal plate which is fixedly connected with the bottom surface of the magnet rotating disc through a connecting rod, a chute parallel to the rotating shaft is arranged at the bottom of the horizontal plate, and the top end of any second conductor plate is hung in the chute and is matched and slidingly connected with the chute;
The rotating shaft comprises a distance adjusting screw, two annular limiting grooves are formed in the middle of the rotating shaft along the circumferential direction, external threads are respectively formed in the two ends of the rotating shaft, magnet rollers are clamped in the annular limiting grooves in a matched mode and are connected with the annular limiting grooves in a rotating mode, two second conductor plates are respectively arranged at the two ends of the distance adjusting screw, any one of the second conductor plates is connected with the distance adjusting screw in a matched sliding mode through middle through holes, two distance adjusting nuts are respectively arranged at the outer sides of the two second conductor plates and are connected with the distance adjusting screw in a matched threaded mode, two compression springs are respectively arranged between the magnet rollers and the two second conductor plates, and any compression spring is sleeved on the distance adjusting screw.
2. The damper with parallel rotary eddy current damping device as claimed in claim 1, wherein the mass block group comprises a case body having a hollow structure with an open top, a plurality of partitions disposed in the case body and dividing an upper space thereof into a plurality of accommodation chambers, each of which is the same size and is located at the same height, a first mass block fixed in a lower space of the case body, a plurality of second mass blocks disposed in the plurality of accommodation chambers, any of which is adapted to a cross-sectional shape of the accommodation chamber.
3. The damper with parallel rotary eddy current damping device as set forth in claim 1, wherein the mounting base further comprises a plurality of guide rails disposed corresponding to the plurality of columns, any guide rail being fixed to a side wall of the corresponding column adjacent to the mass block group in a height direction, a plurality of sliders disposed in one-to-one correspondence with the plurality of guide rails, any slider being fixed to an outer side wall of the mass block group and being slidably coupled with the corresponding guide rail.
4. The damper with parallel rotary eddy current damping device as claimed in claim 1, wherein the connection parts of the elastic element, the mass block group and the bottom plate are respectively fixedly provided with a limiter, and the end parts of the elastic element are matched and sleeved with the corresponding limiters.
5. The damper with parallel rotary eddy current damping device as recited in claim 1, wherein the support frame includes a plurality of inverted L brackets disposed at intervals along a circumferential direction of the first conductor plate, a vertical portion of any of the inverted L brackets being located outside the first conductor plate and fixed to the bottom plate, and a horizontal portion being fixedly connected to the first conductor plate.
6. The damper with parallel rotational eddy current damping apparatus as recited in claim 5, wherein the vertical portion of the inverted-L bracket is a telescoping mechanism configured to adjust the spacing of the first conductor plate from the base plate.
7. The damper with parallel rotary eddy current damping apparatus as recited in claim 1, wherein center points of the mass group, the first conductor plate and the magnet rotating disk are all located on an axis of the screw.
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| CN202510045147.0A CN119435634B (en) | 2025-01-13 | 2025-01-13 | Damper with parallel rotary eddy current damping device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112127498A (en) * | 2020-10-19 | 2020-12-25 | 上海史狄尔建筑减震科技有限公司 | Rotary eddy current tuned mass damper |
| CN116447083A (en) * | 2022-01-05 | 2023-07-18 | 新疆金风科技股份有限公司 | Dampers, tower components and wind turbines |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2003104679A1 (en) * | 2002-06-06 | 2003-12-18 | カヤバ工業株式会社 | Electromagnetic damper |
| EP3608605B1 (en) * | 2018-08-06 | 2021-01-27 | Soltec Energías Renovables, SL | A single axis solar tracker with a torsional vibration damping device |
| CN112128285B (en) * | 2020-09-14 | 2021-09-24 | 湖南大学 | A vertical tuning mass magnetic lead screw type inertial capacitance eddy current damper |
| CN112128286B (en) * | 2020-09-14 | 2021-09-24 | 湖南大学 | A Vertical Tuning Mass Ball Screw Inertial Capacitance Eddy Current Damper |
| CN112178104A (en) * | 2020-11-06 | 2021-01-05 | 大连理工大学 | A Rapid Assembly Length Adaptive Eddy Current Damper |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127498A (en) * | 2020-10-19 | 2020-12-25 | 上海史狄尔建筑减震科技有限公司 | Rotary eddy current tuned mass damper |
| CN116447083A (en) * | 2022-01-05 | 2023-07-18 | 新疆金风科技股份有限公司 | Dampers, tower components and wind turbines |
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