CN117189810A - A rotary eddy current damper with high damping force and its use method - Google Patents
A rotary eddy current damper with high damping force and its use method Download PDFInfo
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- CN117189810A CN117189810A CN202311186776.2A CN202311186776A CN117189810A CN 117189810 A CN117189810 A CN 117189810A CN 202311186776 A CN202311186776 A CN 202311186776A CN 117189810 A CN117189810 A CN 117189810A
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Abstract
The invention relates to a rotary type eddy current damper with high damping force and a use method thereof, and an outer sleeve; the ball screw transmission system comprises a ball screw shaft, a ball nut, a steel sleeve fixedly connected with the ball nut and a plurality of conductor plates arranged on the outer wall of the steel sleeve, and a first cavity for the conductor plates to rotate along the axis horizontal direction is formed between the ball screw transmission system and the outer sleeve; and a magnetic field unit including a plurality of permanent magnets for forming a magnetic field; when the vibration damping device works, the vibration damping structure generates displacement to drive the ball screw shaft to do linear motion, the steel sleeve drives the conductor plates to do rotary motion in the first cavity, and the conductor plates cut magnetic induction lines generated in a magnetic field formed by the permanent magnets at the upper side and the lower side and generate force opposite to the displacement of the vibration damping structure to finish vibration damping. Compared with the prior art, the invention improves damping force and avoids the influence of excessive temperature on the performance of the conductor plate and the permanent magnet.
Description
Technical Field
The invention belongs to the technical field of structural vibration control, and particularly relates to a rotary type eddy current damper with high damping force and a use method thereof.
Background
The eddy current damping generates eddy current according to an electromagnetic induction principle, and the eddy current flows in the conductor plate to generate heat, so that the damper generates damping effect, namely damping force is generated through relative movement between the magnetic field and the conductor. Compared with some damping devices commonly used in the field of structural vibration control, the eddy current damper has the advantages of no friction, simple structure, durability and the like, and is an ideal damper form. At present, the current eddy current damping technology is widely applied to the fields of automobile vibration reduction, rotary mechanical vibration control and the like. The vibration speed of the building structure is several orders of magnitude lower than the high speed motion of vehicles, rotating machinery. The application of the eddy current damping in the building structure mainly provides damping units for tuned mass dampers, and most of the eddy current damping units are linear flat plates, so that the limitations of large volume and small damping force of the damping device exist. In recent years, with the intensive study of damping performance of an eddy current damper, various structural forms of the eddy current damper are developed.
The rotary eddy current damper improves the output of eddy current damping force by introducing a ball screw, a gear rack and other transmission components. For example, chinese patent No. CN109163047B discloses a nonlinear eddy current inertial damper, which comprises a transmission assembly, a rotary eddy current damping element, an inertial flywheel and an outer cylinder, and the damping coefficient of the rotary eddy current damping part is converted into an equivalent axial damping coefficient which is amplified by multiple times by a ball screw transmission system. However, when the eddy current damper works, only a single conductor plate cuts a magnetic induction line to generate damping force, the output damping force is smaller, and when the damping force required to be output is larger, the volume of the damper is required to be designed to be larger, the energy consumption efficiency is low, and the eddy current damper is difficult to apply in practical engineering.
From the energy consumption perspective, the eddy current damper works by converting mechanical energy of a conductor plate moving in a magnetic field into electric energy, converting resistance of the conductor plate into heat energy, and dissipating the heat energy through air, so that a damping effect is generated. In general, as the temperature increases, the conductivity of the conductor plate increases, and the magnetism of the permanent magnet deteriorates, resulting in a decrease in eddy current damping force. The existing rotary type eddy current damper mainly dissipates heat through the shell material of the damper, and is low in heat dissipation efficiency and can obviously influence the performance of the damper in a high-temperature state.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a rotary eddy current damper with high damping force and a use method thereof.
The aim of the invention can be achieved by the following technical scheme:
in one aspect, the present invention provides a rotary eddy current damper with high damping force, comprising:
an outer sleeve;
the ball screw transmission system is positioned at the axis of the outer sleeve and comprises a ball screw shaft, a ball nut, a steel sleeve fixedly connected with the ball nut and a plurality of conductor plates arranged on the outer wall of the steel sleeve, and a first cavity for the conductor plates to rotate along the axis horizontal direction is formed between the ball screw transmission system and the outer sleeve;
the magnetic field units are positioned on the inner side wall of the outer sleeve and are distributed on the upper side and the lower side of the conductor plate in parallel, and the magnetic field units comprise a plurality of permanent magnets used for forming a magnetic field;
when the vibration damping device works, the vibration damping structure generates displacement to drive the ball screw shaft to do linear motion, the steel sleeve drives the conductor plates to do rotary motion in the first cavity, and the conductor plates cut magnetic induction lines generated in a magnetic field formed by the permanent magnets at the upper side and the lower side and generate force opposite to the displacement of the vibration damping structure to finish vibration damping.
Considering that the ball screw transmission system can do linear motion in the axis direction in the outer sleeve, the following arrangement is adopted in order to prevent the ball screw transmission system from touching the bottom of the outer sleeve.
Further, a second cavity for the ball screw transmission system to do axial rectilinear motion is arranged at the bottom of the axial center of the outer sleeve.
A ball screw is a device that converts a rotational motion into a linear motion or a linear motion into a rotational motion, and in the present invention, a ball screw transmission system converts a linear motion into a rotational motion.
Further, the ball screw transmission system also comprises a first connecting piece positioned on the ball screw shaft, a second connecting piece positioned on the outer sleeve, a first thrust bearing which is close to the first connecting piece and is clung to the inner wall of the outer sleeve, and a second thrust bearing which is close to the second connecting piece and is clung to the inner wall of the outer sleeve;
the first thrust bearing and the second thrust bearing convert axial linear motion of the ball screw shaft into rotary motion of the conductor plate at the axis horizontal position;
the first connecting piece and the second connecting piece are respectively connected with two sides of the belt damping structure.
Considering that a plurality of conductor plates are arranged and the conductor plates are uniformly distributed on the ball screw transmission system, the steel sleeve is attached to the ball nut, and the steel sleeve plays the same role as the ball nut.
Further, one end of the ball nut is connected with the first thrust bearing, one end of the steel sleeve is connected with the second thrust bearing, and the steel sleeve and the ball nut are fixed into a whole;
the ball nut and the steel sleeve together drive the conductor plate to do rotary motion at the axis horizontal position.
In consideration of the excessive displacement of the structure to be damped, since a plurality of conductor plates are provided, a plurality of magnetic field units are correspondingly required to be matched with the conductor plates, and in order that the plurality of conductor plates can cut magnetic induction lines in the magnetic field units, the following arrangement is adopted.
Further, the magnetic field unit further comprises a back iron plate connected with the outer sleeve, and the permanent magnets are fixed on the upper side and the lower side of the back iron plate;
the permanent magnets located on the upper and lower sides of the conductor plate form a magnetic field to be cut by the conductor plate.
The following materials are used in view of how better the magnetic field unit can generate a stronger damping force to shock-absorbing the structure.
Further, the back iron plate is made of magnetic conductive materials.
Further, the permanent magnet is made of rare earth permanent magnet material.
Considering that the resistance of the conductor plate generates heat energy, the temperature rise is caused by air dissipation, the conductivity of the conductor plate is increased, and the magnetism of the permanent magnet is degraded, thereby causing the reduction of the eddy current damping force, the following arrangement is adopted to avoid the defect.
Further, an oil injection nozzle capable of injecting insulating heat conducting oil is arranged on the outer side of the outer sleeve. The insulating heat conducting oil can be transformer oil, and is adhered to the conductor plate after being injected into the outer sleeve for cooling.
Furthermore, a sealing piece for preventing the insulating heat conducting oil from leaking is further arranged on the outer wall of the outer sleeve, and the sealing piece is connected with the ball screw transmission system.
The invention also provides a use method of the rotary eddy current damper with high damping force, which comprises the following steps:
s1: the first connecting piece and the second connecting piece are respectively connected with two sides of the damping structure;
s2: when the belt damping structure generates displacement to drive the ball screw shaft to do axial rectilinear motion, the first thrust bearing and the second thrust bearing convert the axial motion of the ball screw shaft into the rotation motion of the conductor plate at the axial horizontal position, the conductor plate rotates at high speed in the magnetic field unit, the magnetic field formed between two adjacent back iron plates is cut, and an axial eddy current damping force is generated and applied to the structure to be damped, so that the damping purpose is achieved;
s3: the oil filling nozzle is opened, the insulating heat conduction oil is filled, the insulating heat conduction oil flows on the surface of the conductor plate, heat energy generated by the conductor plate is absorbed, and the influence of temperature rise on damping force is avoided.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention combines the ball screw transmission system with the magnetic field unit and the conductor plates, realizes that a plurality of conductor plates cut magnetic induction lines in one eddy current damper with smaller overall dimension to generate damping force, improves the damping force output of the rotary eddy current damper, and can adjust the required damping force by changing the number of layers of the magnetic field and the conductor plates.
(2) According to the invention, the insulating heat conduction oil is injected into the rotary type eddy current damper, so that the direct cooling of the conductor plate is realized, the heat dissipation efficiency of the eddy current damper is greatly improved, the influence of the excessive temperature on the physical properties of the conductor plate and the permanent magnet is avoided, and the reduction of the output damping force is avoided.
(3) The rotary type eddy current damper is formed by assembling the components, and is beneficial to standardized and large-scale production. The electric vortex damper does not need external power supply, has good stability and has wide market application prospect.
Drawings
Fig. 1 is a schematic structural view of a rotary electric vortex damper in embodiment 1 of the present invention.
Fig. 2 is a schematic diagram showing a specific application of the rotary eddy current damper in the embodiment 1 of the invention in the reinforced concrete frame shock absorbing structure.
Reference numerals in the drawings:
the device comprises a 1-conductor plate, a 2-back iron plate, a 3-permanent magnet, a 4-ball screw shaft, a 5-ball nut, a 6-steel sleeve, a 7-first thrust bearing, an 8-outer sleeve, a 9-first connecting piece, a 10-sealing piece, a 11-second connecting piece, a 12-oiling nozzle, a 13-frame beam, a 14-damper support and a 15-second thrust bearing.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following examples.
Features such as a part model, a material name, a connection structure, a control method and the like which are not explicitly described in the technical scheme are all regarded as common technical features disclosed in the prior art.
In the description of the present invention, it should be understood that the terms "upper," "lower," "vertical," "horizontal," "top," "bottom," and the like indicate an orientation or a positional relationship based on that 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 devices or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be bolt connection or welding connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In order to improve the damping force of the rotary type eddy current damper and avoid the influence of excessive temperature on the physical properties of a conductor plate and a permanent magnet, the invention provides a rotary type eddy current damper with high damping force, the structure of which is shown in FIG. 1, comprising
An outer sleeve 8;
the ball screw transmission system is positioned at the axis of the outer sleeve 8 and comprises a ball screw shaft 4, a ball nut 5, a steel sleeve 6 fixedly connected with the ball nut 5 and a plurality of conductor plates 1 arranged on the outer wall of the steel sleeve 6, and a first cavity 16 for the conductor plates 1 to rotate along the axis horizontal direction is formed between the ball screw transmission system and the outer sleeve 8;
the magnetic field units are positioned on the inner side wall of the outer sleeve 8 and are distributed on the upper side and the lower side of the conductor plate 1 in parallel, and comprise a plurality of permanent magnets 3 used for forming a magnetic field;
when the vibration damping device works, the vibration damping structure generates displacement to drive the ball screw shaft 4 to do linear motion, the steel sleeve 6 drives the plurality of conductor plates 1 to do rotary motion in the first cavity 16, and the conductor plates 1 cut magnetic induction lines generated in a magnetic field formed by the permanent magnets 3 on the upper side and the lower side and generate force opposite to the displacement of the vibration damping structure to finish vibration damping.
Considering that the ball screw transmission system can make linear motion in the axial direction in the outer sleeve 8, in order to prevent the ball screw transmission system from touching the bottom of the outer sleeve 8, the following arrangement is adopted.
In some specific embodiments, referring to fig. 1 again, a second cavity 17 for the ball screw transmission system to perform axial rectilinear motion is provided at the bottom of the axial center of the outer sleeve 8.
A ball screw is a device that converts a rotational motion into a linear motion or a linear motion into a rotational motion, and in the present invention, a ball screw transmission system converts a linear motion into a rotational motion.
In some specific embodiments, referring again to fig. 1, the ball screw transmission system further includes a first connecting member 9 disposed on the ball screw shaft 4, a second connecting member 10 disposed on the outer sleeve 8, a first thrust bearing 7 adjacent to the first connecting member 9 and abutting the inner wall of the outer sleeve 8, and a second thrust bearing 15 adjacent to the second connecting member 10 and abutting the inner wall of the outer sleeve 8;
the first thrust bearing 7 and the second thrust bearing 15 convert the axial linear motion of the ball screw shaft 4 into the rotational motion of the conductor plate 1 at the axis horizontal position;
the first connecting piece 9 and the second connecting piece 10 are respectively connected with two sides of the belt damping structure.
Considering that a plurality of conductor plates 1 are provided and the conductor plates 1 are uniformly distributed on the ball screw transmission system, the steel sleeve 6 is provided to be attached to the ball nut 5, so that the steel sleeve 6 plays the same role as the ball nut 5.
In a more specific embodiment, referring to fig. 1 again, one end of the ball nut 5 is connected to the first thrust bearing 7, one end of the steel sleeve 6 is connected to the second thrust bearing 15, and the steel sleeve 6 is integrally fixed with the ball nut 5;
the ball nut 5 and the steel sleeve 6 drive the conductor plate 1 to rotate at the axis horizontal position.
In view of the excessive displacement of the structure to be damped, since a plurality of conductor plates 1 are provided, a plurality of magnetic field units are correspondingly provided in cooperation therewith, and in order for the plurality of conductor plates 1 to be able to cut the magnetic field, the following arrangement is adopted.
In some specific embodiments, referring to fig. 1 again, the magnetic field unit further includes a back iron plate 2 connected to an outer sleeve 8, and the permanent magnets 3 are fixed to the upper and lower sides of the back iron plate 2;
the permanent magnets 3 located at the upper and lower sides of the conductor plate 1 form a magnetic field to be cut by the conductor plate 1.
The following materials are used in view of how better the magnetic field unit can generate a stronger damping force to shock-absorbing the structure.
In a more specific embodiment, referring to fig. 1, the back iron plate 2 is made of a magnetically conductive material.
In a more specific embodiment, referring to fig. 1 again, the permanent magnet 3 is a rare earth permanent magnet material.
Considering that the resistance of the conductor plate 1 generates heat energy, the temperature rise is caused by air dissipation, the conductivity of the conductor plate 1 increases, the magnetism of the permanent magnet deteriorates, and thus the eddy current damping force decreases, the following arrangement is adopted to avoid the defect.
In some embodiments, referring to fig. 1 again, a nozzle 12 for injecting insulating and heat-conducting oil is disposed outside the outer sleeve 8. The insulating heat conducting oil can be transformer oil, and is adhered to the conductor plate after being injected into the outer sleeve for cooling.
In a more specific embodiment, referring to fig. 1 again, a sealing member 10 for preventing the leakage of the insulating and heat-conducting oil is further disposed on the outer wall of the outer sleeve 8, and the sealing member 10 is connected with a ball screw transmission system.
The invention also provides a use method of the rotary eddy current damper with high damping force, which comprises the following steps:
s1: the first connecting piece 9 and the second connecting piece 10 are respectively connected with two sides of the belt damping structure;
s2: when the belt damping structure generates displacement to drive the ball screw shaft 4 to do axial rectilinear motion, the first thrust bearing 7 and the second thrust bearing 15 convert the axial motion of the ball screw shaft 4 into the rotation motion of the conductor plate 1 at the axial horizontal position, the conductor plate 1 rotates at a high speed in the magnetic field unit, the magnetic field formed between two adjacent back iron plates 2 is cut, and the axial eddy current damping force is generated and applied to the structure to be damped, so that the damping purpose is achieved;
s3: the oiling nozzle 12 is opened, and insulating heat conduction oil is injected, flows on the surface of the conductor plate 1, absorbs heat energy generated by the conductor plate 1, and avoids the influence of temperature rise on damping force.
The above embodiments may be implemented singly or in any combination of two or more.
The above embodiments are described in more detail below in connection with specific examples.
Example 1:
in order to improve the damping force of the rotary type eddy current damper and avoid the influence of excessive temperature on the physical properties of a conductor plate and a permanent magnet, the invention provides a rotary type eddy current damper with high damping force, the structure of which is shown in FIG. 1, comprising
An outer sleeve 8;
the ball screw transmission system is positioned at the axial center of the outer sleeve 8 and comprises a ball screw shaft 4, a ball nut 5, a steel sleeve 6 fixedly connected with the ball nut 5 and a plurality of conductor plates 1 arranged on the outer wall of the steel sleeve 6, and a first cavity 16 for the conductor plates 1 to rotate along the axial center horizontal direction is formed between the ball screw transmission system and the outer sleeve 8;
the magnetic field units are positioned on the inner side wall of the outer sleeve 8 and are distributed on the upper side and the lower side of the conductor plate 1 in parallel, and comprise a plurality of permanent magnets 3 used for forming a magnetic field;
when the vibration damping device works, the vibration damping structure generates displacement to drive the ball screw shaft 4 to do linear motion, the steel sleeve 6 drives the plurality of conductor plates 1 to do rotary motion in the first cavity 16, and the conductor plates 1 cut magnetic induction lines generated in a magnetic field formed by the upper permanent magnet 3 and the lower permanent magnet 3 and generate force opposite to the displacement of the vibration damping structure to finish vibration damping.
Considering that the ball screw transmission system can make linear motion in the axial direction in the outer sleeve 8, in order to prevent the ball screw transmission system from touching the bottom of the outer sleeve 8, the following arrangement is adopted.
Referring to fig. 1 again, a second cavity 17 for the ball screw transmission system to perform axial linear motion is provided at the bottom of the axial center of the outer sleeve 8.
A ball screw is a device that converts a rotational motion into a linear motion or a linear motion into a rotational motion, and in the present invention, a ball screw transmission system converts a linear motion into a rotational motion.
Referring again to fig. 1, the ball screw transmission system further includes a first connecting member 9 located on the ball screw shaft 4, a second connecting member 10 located on the outer sleeve 8, a first thrust bearing 7 adjacent to the first connecting member 9 and closely attached to the inner wall of the outer sleeve 8, and a second thrust bearing 15 adjacent to the second connecting member 10 and closely attached to the inner wall of the outer sleeve 8;
the first thrust bearing 7 and the second thrust bearing 15 convert the axial linear motion of the ball screw shaft 4 into the rotary motion of the conductor plate 1 at the axis horizontal position;
the first connecting piece 9 and the second connecting piece 10 are respectively connected with two sides of the belt damping structure.
Considering that a plurality of conductor plates 1 are provided and the conductor plates 1 are uniformly distributed on the ball screw transmission system, the steel sleeve 6 is provided to be attached to the ball nut 5, so that the steel sleeve 6 plays the same role as the ball nut 5.
Referring to fig. 1 again, one end of the ball nut 5 is connected with the first thrust bearing 7, one end of the steel sleeve 6 is connected with the second thrust bearing 15, and the steel sleeve 6 is fixed with the ball nut 5;
the ball nut 5 and the steel sleeve 6 together drive the conductor plate 1 to rotate at the axis horizontal position.
In view of the excessive displacement of the structure to be damped, since a plurality of conductor plates 1 are provided, a plurality of magnetic field units are correspondingly provided in cooperation therewith, and in order for the plurality of conductor plates 1 to be able to cut the magnetic field, the following arrangement is adopted.
Referring to fig. 1 again, the magnetic field unit further includes a back iron plate 2 connected to an outer sleeve 8, and permanent magnets 3 are fixed on the upper and lower sides of the back iron plate 2;
the permanent magnets 3 located at the upper and lower sides of the conductor plate 1 form a magnetic field to be cut by the conductor plate 1.
The following materials are used in view of how better the magnetic field unit can generate a stronger damping force to shock-absorbing the structure.
Referring to fig. 1 again, the back iron plate 2 is made of a magnetically conductive material.
Referring to fig. 1 again, the permanent magnet 3 is a rare earth permanent magnet material.
Considering that the resistance of the conductor plate 1 generates heat energy, the temperature rise is caused by air dissipation, the conductivity of the conductor plate 1 increases, the magnetism of the permanent magnet deteriorates, and thus the eddy current damping force decreases, the following arrangement is adopted to avoid the defect.
Referring to fig. 1 again, the outer side of the outer sleeve 8 is provided with a grease nipple 12 for injecting insulating heat-conducting oil. The insulating heat conducting oil can be transformer oil, and is adhered to the conductor plate after being injected into the outer sleeve for cooling.
Referring to fig. 1 again, a sealing member 10 for preventing the leakage of the insulating and heat-conducting oil is further provided on the outer wall of the outer sleeve 8, and the sealing member 10 is connected with the ball screw transmission system.
The invention also provides a use method of the rotary eddy current damper with high damping force, which comprises the following steps:
s1: the first connecting piece 9 and the second connecting piece 10 are respectively connected with two sides of the belt damping structure;
s2: when the belt damping structure generates displacement to drive the ball screw shaft 4 to do axial rectilinear motion, the first thrust bearing 7 and the second thrust bearing 15 convert the axial motion of the ball screw shaft 4 into the rotation motion of the conductor plate 1 at the axial horizontal position, the conductor plate 1 rotates at a high speed in the magnetic field unit, the magnetic field formed between two adjacent back iron plates 2 is cut, and the axial eddy current damping force is generated and applied to the structure to be damped, so that the damping purpose is achieved;
s3: the oiling nozzle 12 is opened, and insulating heat conduction oil is injected, flows on the surface of the conductor plate 1, absorbs heat energy generated by the conductor plate 1, and avoids the influence of temperature rise on damping force.
The invention also provides a use method of the rotary eddy current damper with high damping force, which comprises the following steps:
s1: the first connecting piece 9 and the second connecting piece 10 are respectively connected with two sides of the belt damping structure;
s2: when the belt damping structure generates displacement to drive the ball screw shaft 4 to do axial rectilinear motion, the first thrust bearing 7 and the second thrust bearing 15 convert the axial motion of the ball screw shaft 4 into the rotation motion of the conductor plate 1 at the axial horizontal position, the conductor plate 1 rotates at a high speed in the magnetic field unit, the magnetic field formed between two adjacent back iron plates 2 is cut, and the axial eddy current damping force is generated and applied to the structure to be damped, so that the damping purpose is achieved;
s3: the oiling nozzle 12 is opened, and insulating heat conduction oil is injected, flows on the surface of the conductor plate 1, absorbs heat energy generated by the conductor plate 1, and avoids the influence of temperature rise on damping force.
The present embodiment also provides an application of the rotary eddy current damper of the present invention in a frame structure, and the structure is shown in fig. 2.
The rotary type eddy current damper is characterized in that a first connecting piece 9 is connected with a reinforced concrete frame beam 13, a second connecting piece 11 is connected with a damper support 14 and is arranged between layers of the reinforced concrete frame structure. When the structure suffers from earthquake action, the ball screw transmission system converts interlayer displacement of the structure into high-speed rotation of the multilayer conductor plate 1 in the magnetic field unit, the cutting magnetic induction lines generate eddy current damping, and axial eddy current damping force is generated to be applied to the structure, so that the purpose of shock absorption is achieved. Meanwhile, transformer oil is injected, flows on the surface of the conductor plate 1, absorbs heat energy generated by the conductor plate 1, and avoids the influence of temperature rise on damping force.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (10)
1. A rotary electric vortex damper having a high damping force, comprising:
an outer sleeve (8);
the ball screw transmission system is positioned at the axis of the outer sleeve (8) and comprises a ball screw shaft (4), a ball nut (5), a steel sleeve (6) fixedly connected with the ball nut (5) and a plurality of conductor plates (1) arranged on the outer wall of the steel sleeve (6), and a first cavity (16) for the conductor plates (1) to rotate along the axis horizontal direction is formed between the ball screw transmission system and the outer sleeve (8);
the magnetic field units are positioned on the inner side wall of the outer sleeve (8) and are distributed on the upper side and the lower side of the conductor plate (1) in parallel, and the magnetic field units comprise a plurality of permanent magnets (3) used for forming a magnetic field;
during operation, the to-be-damped structure generates displacement to drive the ball screw shaft (4) to do linear motion, the steel sleeve (6) drives the plurality of conductor plates (1) to do rotary motion in the first cavity (16), and the conductor plates (1) cut magnetic induction lines generated in a magnetic field formed by the permanent magnets (3) on the upper side and the lower side and generate force opposite to the to-be-damped structure displacement to finish damping.
2. A rotary eddy current damper with high damping force according to claim 1, characterized in that a second cavity (17) for the ball screw transmission system to do axial rectilinear motion is formed between the axial bottoms of the outer sleeves (8).
3. A rotary eddy current damper with high damping force according to claim 1, characterized in that the ball screw transmission system further comprises a first connecting piece (9) on the ball screw shaft (4), a second connecting piece (10) on the outer sleeve (8), a first thrust bearing (7) close to the first connecting piece (9) and in close contact with the inner wall of the outer sleeve (8), and a second thrust bearing (15) close to the second connecting piece (10) and in close contact with the inner wall of the outer sleeve (8);
the first thrust bearing (7) and the second thrust bearing (15) convert the axial linear motion of the ball screw shaft (4) into the rotational motion of the conductor plate (1) at the axis horizontal position;
the first connecting piece (9) and the second connecting piece (10) are respectively connected with two sides of the belt damping structure.
4. A rotary eddy current damper with high damping force according to claim 3, characterized in that one end of the ball nut (5) is connected with the first thrust bearing (7), one end of the steel sleeve (6) is connected with the second thrust bearing (15), and the steel sleeve (6) is fixed with the ball nut (5) into a whole;
the ball nut (5) and the steel sleeve (6) drive the conductor plate (1) to rotate at the axis horizontal position.
5. The rotary eddy current damper with high damping force according to claim 1, wherein the magnetic field unit further comprises a back iron plate (2) connected with an outer sleeve (8), and the permanent magnets (3) are fixed on the upper side and the lower side of the back iron plate (2);
permanent magnets (3) positioned on the upper side and the lower side of the conductor plate (1) form a magnetic field to be cut by the conductor plate (1).
6. The rotary eddy current damper with high damping force according to claim 5, wherein the back iron plate (2) is a magnetically conductive material.
7. A rotary eddy current damper with high damping force according to claim 5, characterized in that the permanent magnet (3) is a rare earth permanent magnet material.
8. The rotary electric vortex damper with high damping force according to claim 1, characterized in that the outer side of the outer sleeve (8) is provided with a grease nipple (12) for injecting insulating heat conducting oil.
9. The rotary eddy current damper with high damping force according to claim 8, wherein a sealing member (10) for preventing the leakage of the insulating heat conducting oil is further arranged on the outer wall of the outer sleeve (8), and the sealing member (10) is connected with a ball screw transmission system.
10. A method of using a high damping force rotary eddy current damper as claimed in any one of claims 1 to 9, comprising the steps of:
s1: the first connecting piece (9) and the second connecting piece (10) are respectively connected with two sides of the belt damping structure;
s2: when the belt damping structure generates displacement to drive the ball screw shaft (4) to do axial rectilinear motion, the first thrust bearing (7) and the second thrust bearing (15) convert the axial motion of the ball screw shaft (4) into the rotation motion of the conductor plate (1) at the axial horizontal position, the conductor plate (1) rotates at a high speed in the magnetic field unit, the magnetic field formed between two adjacent back iron plates (2) is cut, and axial eddy current damping force is generated and applied to the structure to be damped, so that the damping purpose is achieved;
s3: and opening the oiling nozzle (12), injecting insulating heat conduction oil, enabling the insulating heat conduction oil to flow on the surface of the conductor plate (1), absorbing heat energy generated by the conductor plate (1), and avoiding the influence of temperature rise on damping force.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311186776.2A CN117189810A (en) | 2023-09-14 | 2023-09-14 | A rotary eddy current damper with high damping force and its use method |
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| CN202311186776.2A CN117189810A (en) | 2023-09-14 | 2023-09-14 | A rotary eddy current damper with high damping force and its use method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1089406A (en) * | 1996-09-17 | 1998-04-07 | Kawasaki Heavy Ind Ltd | Damping device using induced current |
| CN1744980A (en) * | 2003-01-27 | 2006-03-08 | 住友重机械工业株式会社 | Forming machine with lubricating mechanism and method for lubricating the forming machine |
| CN103821861A (en) * | 2014-03-21 | 2014-05-28 | 湖南大学 | Axial eddy current damper based on spiral transmission method |
| CN109138207A (en) * | 2018-09-29 | 2019-01-04 | 山东大学 | A kind of electric regenerative eddy current damper |
| 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 |
-
2023
- 2023-09-14 CN CN202311186776.2A patent/CN117189810A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1089406A (en) * | 1996-09-17 | 1998-04-07 | Kawasaki Heavy Ind Ltd | Damping device using induced current |
| CN1744980A (en) * | 2003-01-27 | 2006-03-08 | 住友重机械工业株式会社 | Forming machine with lubricating mechanism and method for lubricating the forming machine |
| CN103821861A (en) * | 2014-03-21 | 2014-05-28 | 湖南大学 | Axial eddy current damper based on spiral transmission method |
| CN109138207A (en) * | 2018-09-29 | 2019-01-04 | 山东大学 | A kind of electric regenerative eddy current damper |
| 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 |
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