CN218000241U

CN218000241U - Electric eddy damper

Info

Publication number: CN218000241U
Application number: CN202221560259.8U
Authority: CN
Inventors: 何旭辉; 陈良江; 周勇政; 邹云峰; 马清
Original assignee: Central South University; China State Railway Group Co Ltd
Current assignee: Central South University; China State Railway Group Co Ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-12-09
Anticipated expiration: 2032-06-21

Abstract

The utility model discloses an eddy current damper, form eddy current damping system through casing, activity guide arm and magnetic component, when waiting that the damping structure produces the vibration, the activity guide arm is forced to produce the axial and is drawn the motion and take place relative displacement with magnetic component in order to cut the magnetic induction line, produce the induction eddy current, the induction eddy current produces the magnetic field opposite with former magnetic field direction, and then produce the damping force that hinders activity guide arm and former magnetic field relative motion, the induction eddy current who produces in the activity guide arm dissipates in the surrounding environment constantly with the form of heat energy simultaneously; the friction force of the movable guide rod in the movement process is reduced through the guide assembly; then the shell is supported from the bottom and/or the side direction through the wind resisting group; this scheme is mutually in coordination through casing, activity guide arm and magnetic component, treats the damping structure and carries out the energy dissipation damping, and rethread direction subassembly and anti-wind subassembly ensure to move steadily, improve the wind resistance, and the practicality is strong, is suitable for extensive popularization and application.

Description

Eddy current damper

Technical Field

The utility model relates to a structural vibration control technical field especially relates to an eddy current damper.

Background

In the existing various projects, a damper is often adopted for energy dissipation and vibration reduction to ensure the safety and reliability of the project.

The traditional damper mainly comprises an oil damper, the durability of sealing elements and damping oil in the oil damper is always questioned, the friction force of the oil damper is large due to the existence of the sealing elements, the oil leakage phenomenon is easy to occur under the reciprocating load action, once the oil damper leaks oil, the damping force and the damping coefficient of the oil damper are reduced, the design requirements are not met, and the potential safety hazard exists in engineering. In addition, the oil damper also has a series of problems of short service life, high maintenance cost, complex connection, low sensitivity, large starting resistance and the like.

The eddy current damping technology is a vibration damping technology which converts mechanical energy of object motion into electric energy in a conductor plate based on an electromagnetic induction law and then converts the electric energy into heat energy through a thermal resistance effect of the conductor plate to dissipate vibration energy of a system. The specific working principle is as follows: after the conductor moves in the magnetic field to generate eddy current, the eddy current interacts with the original magnetic field to generate damping force for preventing the conductor and the magnetic field from moving relatively, and meanwhile, the eddy current generated in the conductor is continuously dissipated to the surrounding environment in the form of heat energy. Therefore, the eddy current damping technology adopts a non-contact energy consumption mode, has the advantages of good durability, long service life, easy damping adjustment and the like, and is widely applied to the technical field of structural vibration control.

However, the current eddy current damper adopting the eddy current damping technology has poor wind resistance and unstable movement, and is not suitable for a working environment which is frequently operated and requires sensitive starting.

SUMMERY OF THE UTILITY MODEL

The utility model provides an eddy current damper to it is poor to solve current eddy current damper wind resistance, and the motion is not steady, is not suitable for the technical problem that frequent and the requirement of work starts sensitive operational environment of work.

According to an aspect of the present invention, there is provided an eddy current damper, including: the shell is provided with an installation cavity along the axial direction; the magnetic assembly is arranged in the mounting cavity and encloses to form a movable cavity for generating a magnetic field; the movable guide rod is slidably arranged in the movable cavity along the axial direction of the shell and is used for cutting the magnetic induction lines to generate damping force, and the extending end of the movable guide rod is used for connecting a structure to be damped; the guide assembly is arranged between the movable guide rod and the magnetic assembly and is used for reducing the friction force of the movable assembly during movement; a wind-resistant assembly supporting the housing from the bottom and/or side for improving wind resistance.

As a further improvement of the technical scheme:

furthermore, the magnetic assembly comprises a plurality of magnets arranged along the circumferential direction of the shell at intervals, a magnetic conduction partition arranged between every two adjacent magnets in the circumferential direction and back iron surrounding the magnets and the magnetic conduction partition, and the connecting line direction of the N pole and the S pole of each magnet is matched with the radial direction of the movable guide rod.

Furthermore, the magnetic assembly also comprises a plurality of magnets arranged at intervals along the axial direction of the shell and a magnetic conduction ring arranged between two adjacent magnets in the axial direction of the shell.

Further, the polarities of the same sides of two adjacent magnets in the axial direction of the housing are opposite or the polarities of the same sides of two adjacent magnets in the circumferential direction are opposite.

Further, the direction subassembly includes along the axial of casing in proper order near arrange and along a plurality of direction balls that circumference interval was arranged in proper order and along the axial of casing lay on magnetic component and enclose and close outside being used for carrying out spacing ball locating part to the direction ball in the direction ball, the direction ball respectively with magnetic component and activity guide arm butt.

Furthermore, the wind-resistant assembly comprises a base, wind-resistant rods, a connecting rod and a clamping block, wherein the base supports the shell from the bottom, the wind-resistant rods are fixedly arranged on two sides of the base respectively, the connecting rod is connected with the wind-resistant rods, the fixing sleeve is arranged on the connecting rod and abuts against the side wall of the shell, and the wind-resistant rods, the connecting rod and the clamping block are arranged in a one-to-one correspondence mode.

Furthermore, the eddy current damper also comprises a limiting structure which is arranged between the magnetic assembly and the movable guide rod and used for limiting the movable guide rod.

Furthermore, the limiting structure comprises an installation rod which is radially arranged and is fixedly connected with the magnetic component, a limiting sleeve which is movably sleeved on the installation rod, an elastic part which is sleeved on the installation rod and is arranged between the magnetic component and the limiting sleeve, and a limiting groove which is obliquely arranged on the movable guide rod and is used for being abutted and limited with the limiting sleeve.

Furthermore, the closed end of the mounting cavity is provided with an elastic buffer cushion for supporting the movable guide rod.

Furthermore, the extending end of the movable guide rod is radially provided with a connecting hole for connecting a structure to be damped.

The utility model discloses following beneficial effect has:

the utility model discloses an eddy current damper, through the casing, activity guide arm and magnetic component form eddy current damping system, when waiting that the damping structure produces vibration, the activity guide arm is forced to produce the axial and is drawn the motion and take place relative displacement with magnetic component in order to cut the magnetic induction line, produce the induction eddy current, the induction eddy current produces the magnetic field opposite with former magnetic field direction, and then produce the damping force that hinders activity guide arm and former magnetic field relative motion, the induction eddy current who produces in the activity guide arm dissipates in the surrounding environment with the form of heat energy constantly simultaneously, thereby play the effect of energy dissipation damping; the friction force in the moving process of the movable guide rod is reduced through the guide assembly, so that the movable guide rod moves stably, and the movable guide rod is further suitable for a working environment with frequent work and sensitive starting requirement; the shell is supported from the bottom and/or the side direction through the wind-resistant group, so that the wind resistance is obviously improved, the structure is stable, and the reliability is high; this scheme is mutually in coordination through casing, activity guide arm and magnetic component, treats the damping structure and carries out the energy dissipation damping, and rethread direction subassembly and anti-wind subassembly ensure to move steadily, improve the wind resistance, for prior art, are applicable to the frequent and requirement of work and start sensitive operational environment, and the practicality is strong, is suitable for extensive popularization and application.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

fig. 1 is a schematic structural diagram of an eddy current damper according to a preferred embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of an eddy current damper according to a preferred embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of an eddy current damper according to a preferred embodiment of the present invention.

Illustration of the drawings:

1. a housing; 11. a mounting cavity; 12. an elastic cushion pad; 2. a movable guide rod; 21. connecting holes; 3. a magnetic component; 31. a magnet; 32. a magnetic conductive partition; 33. back iron; 34. a magnetic conductive ring; 4. a guide assembly; 41. a guide ball; 42. a ball retainer; 5. a wind-resistant assembly; 51. a base; 52. a wind-resistant rod; 53. a connecting rod; 54. a clamping block; 6. and a limiting structure.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered below.

FIG. 1 is a schematic structural view of an eddy current damper according to a preferred embodiment of the present invention; FIG. 2 is a schematic cross-sectional view of an eddy current damper according to a preferred embodiment of the present invention; fig. 3 is a schematic cross-sectional view of an eddy current damper according to a preferred embodiment of the present invention.

As shown in fig. 1 to 3, the eddy current damper of the present embodiment includes: the shell 1 is provided with an installation cavity 11 along the axial direction; the magnetic component 3 is arranged in the installation cavity 11 and encloses to form a movable cavity for generating a magnetic field; the movable guide rod 2 is slidably arranged in the movable cavity along the axial direction of the shell 1 and is used for cutting the magnetic induction lines to generate damping force, and the extending end of the movable guide rod 2 is used for connecting a structure to be damped; the guide assembly 4 is arranged between the movable guide rod 2 and the magnetic assembly 3 and is used for reducing the friction force of the movable assembly during movement; a wind-resistant assembly 5 supporting the housing 1 from the bottom and/or side for improving wind resistance. Specifically, the utility model discloses an eddy current damper, through casing 1, movable guide arm 2 and magnetic component 3 form eddy current damping system, when waiting that the damping structure produces vibration, movable guide arm 2 is forced to produce the axial and is drawn the pressure motion and take place relative displacement with magnetic component 3 in order to cut the magnetic induction line, produce the induction eddy current, the induction eddy current produces the magnetic field opposite with former magnetic field direction, and then produce the damping force that hinders movable guide arm 2 and former magnetic field relative motion, the induction eddy current that produces in the movable guide arm 2 simultaneously dissipates to the environment on every side with the form of heat energy constantly, thereby play the effect of energy dissipation damping; the friction force of the movable guide rod 2 in the movement process is reduced through the guide assembly 4, so that the movable guide rod 2 can move stably, and the movable guide rod is further suitable for a working environment with frequent work and sensitive starting requirements; the shell 1 is supported from the bottom and/or the side direction through the wind-resistant group, so that the wind resistance is obviously improved, the structure is stable, and the reliability is high; this scheme is mutually in coordination through casing 1, activity guide arm 2 and magnetic component 3, treats the damping structure and carries out the energy dissipation damping, and rethread direction subassembly 4 and anti-wind subassembly 5 ensure the motion steady, improve the wind resistance, for prior art, are applicable to the frequent and sensitive operational environment that requires to start of work, and the practicality is strong, is suitable for extensive popularization and application. Optionally, the movable guide rod 2 is made of a material with high electrical conductivity, such as copper or aluminum. Alternatively, the movable guide rod 2 is made of a copper pipe or an aluminum pipe.

As shown in fig. 2, in the present embodiment, the magnetic assembly 3 includes a plurality of magnets 31 arranged at intervals along the circumferential direction of the housing 1, a magnetic conductive partition 32 arranged between two adjacent magnets 31 in the circumferential direction, and a back iron 33 surrounding the magnets 31 and the magnetic conductive partition 32, and a connection line direction of an N pole and an S pole of each magnet 31 matches with a radial direction of the movable guide rod 2. Optionally, a magnetic field is formed by the plurality of magnets 31, so that a magnetic induction line for cutting by the movable guide rod 2 is generated, two adjacent magnets 31 in the circumferential direction are separated by the magnetic conduction partition 32 to shield the magnetic field, prevent the magnetic field from affecting other components, guide the magnetic field, enhance the magnetic field strength, and adjust the damping force by changing the length of the magnetic conduction partition 32; and the magnetic field is ensured to be closed through the back iron 33, the magnetic leakage is reduced, and the eddy current damping energy consumption efficiency is obviously improved. Alternatively, the magnet 31 is a neodymium iron boron permanent magnet 31 or an electromagnet. Alternatively, the magnet 31 is formed in a tile shape or a ring shape.

As shown in fig. 3, in the present embodiment, the magnetic assembly 3 further includes a plurality of magnets 31 arranged at intervals along the axial direction of the housing 1, and a magnetic conductive ring 34 arranged between two adjacent magnets 31 in the axial direction of the housing 1. Specifically, a plurality of magnets 31 arranged along the axial direction of the housing 1 at intervals form a magnetic field with a large axial range, so that the eddy current damping force generated when the movable guide rod 2 moves is improved, and then two adjacent magnets 31 in the axial direction are separated by the magnetic conductive ring 34 so as to shield the magnetic field, prevent the magnetic field from influencing other parts, guide the magnetic field, enhance the magnetic field strength, and simultaneously adjust the damping force by changing the axial length of the magnetic conductive ring 34. Optionally, the magnetically conductive partition 32 is made of a magnetically conductive material. Optionally, the magnetic ring 34 is made of magnetic conductive material. Optionally, the magnetically permeable material is a magnetic field concentrator or core, being a laminated or block-shaped element made of magnetically permeable material. Optionally, the magnetic conductive material is one of a silicon steel sheet, ferrite, and a non-magnetic conductor 31.

As shown in fig. 1, in the present embodiment, the polarities of the same side of two adjacent magnets 31 in the axial direction of the housing 1 are opposite or the polarities of the same side of two adjacent magnets 31 in the circumferential direction are opposite. Specifically, the polarities of the same sides of two adjacent magnets 31 in the axial direction of the housing 1 are opposite, or the polarities of the same sides of two adjacent magnets 31 in the circumferential direction are opposite, that is, when one side of the magnet 31 close to the movable guide rod 2 is an N pole, and one side far away from the movable guide rod 2 is an S pole, then one side of the magnet 31 close to the movable guide rod 2 in the axial direction of the housing 1 is an S pole, and one side far away from the movable guide rod 2 is an N pole, and the different magnetic poles influence each other, so that the magnetic field strength is enhanced, and the damping force is improved.

As shown in fig. 1 to fig. 3, in the present embodiment, the guiding assembly 4 includes a plurality of guiding balls 41 sequentially arranged in close proximity to each other in the axial direction of the housing 1 and sequentially arranged at intervals in the circumferential direction, and ball position limiting members 42 arranged on the magnetic assembly 3 in the axial direction of the housing 1 and surrounding the guiding balls 41 for limiting the guiding balls 41, and the guiding balls 41 are respectively abutted against the magnetic assembly 3 and the movable guide rod 2. Specifically, in the moving process of the movable guide rod 2, the guide balls 41 which are sequentially arranged in an abutting mode in the axial direction and are sequentially arranged at intervals in the circumferential direction are used for guiding, so that surface-to-surface contact is converted into point-to-surface contact, friction force is greatly reduced, and in the rotating process of the guide balls 41, the mass center of the guide balls does not cut magnetic induction lines, so that damping force cannot be generated to influence the moving of the movable guide rod 2; and the guide ball 41 is limited by the ball limiting piece 42, so that the structure is compact and the reliability is high.

As shown in fig. 1, in the present embodiment, the wind-resistant assembly 5 includes a base 51 supporting the housing 1 from the bottom, wind-resistant rods 52 fixedly arranged on two sides of the base 51, respectively, a connecting rod 53 connected to the wind-resistant rods 52, and a latch 54 fixedly arranged on the connecting rod 53 and abutted against a sidewall of the housing 1, and the wind-resistant rods 52, the connecting rod 53, and the latch 54 are arranged in a one-to-one correspondence. Specifically, the housing 1 is supported from the bottom by the base 51, and then linked to each other by the wind-resistant rod 52, the connecting rod 53, and the latch 54 to support the housing 1 from the side, so that wind resistance is remarkably improved. Optionally, the wind-resistant assembly 5 further comprises a fixing bolt for fixing the base 51. Optionally, the wind resistance is arranged along 52 the axial direction of the housing. Optionally, the wind resistant assembly 5 supports the housing 1 from the bottom only. Optionally, the wind-resistant assembly 5 supports the housing 1 only from the lateral direction. Optionally, the base 51 is inserted into the housing 1 for positioning and supporting.

As shown in fig. 1, in this embodiment, the eddy current damper further includes a limiting structure 6 disposed between the magnetic assembly 3 and the movable guide rod 2 for limiting the movable guide rod 2. Specifically, the movable guide bar 2 is limited by the limiting structure 6 to limit excessive movement of the movable guide bar 2.

As shown in fig. 1, in this embodiment, the limiting structure 6 includes an installation rod radially disposed and fixedly connected to the magnetic component 3, a limiting sleeve movably sleeved on the installation rod, an elastic member sleeved on the installation rod and disposed between the magnetic component 3 and the limiting sleeve, and a limiting groove obliquely disposed on the movable guide rod 2 and used for abutting against the limiting sleeve for limiting. Specifically, when spacing recess and stop collar were in same axial position, under the elastic component effect, stop collar butt spacing recess to the axial of restriction activity guide arm 2 upwards or the axial downstream. Optionally, when the limiting groove extends inwards in a direction approaching the extending end of the movable guide rod 2 in an inclined manner, the limiting sleeve abuts against the limiting groove to limit the movable guide rod 2 to move in the direction entering the mounting cavity 11; or when the direction slope inwards that keeps away from the overhanging end of activity guide arm 2 of orientation of spacing recess, spacing sleeve butt spacing recess to restriction activity guide arm 2 is towards the direction motion of leaving installation cavity 11. Optionally, the resilient member is a compression spring.

As shown in fig. 1, in this embodiment, the closed end of the mounting cavity 11 is provided with a resilient cushion 12 supporting the movable guide bar 2. Specifically, the movable guide rod 2 is supported by the elastic buffer cushion 12, so that excessive movement of the movable guide rod 2 is avoided, and the movement stability of the movable guide rod 2 is improved. Alternatively, the elastic cushion 12 is made of an elastic material such as rubber.

As shown in fig. 1, in the present embodiment, the extending end of the movable guide rod 2 is radially provided with a connecting hole 21 for connecting a structure to be damped. Specifically, the structure to be damped is connected through the connecting hole 21 so as to perform energy dissipation and vibration damping on the structure to be damped.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An eddy current damper, comprising:

the shell (1) is provided with an installation cavity (11) along the axial direction;

the magnetic component (3) is arranged in the installation cavity (11) and encloses to form a movable cavity and is used for generating a magnetic field;

the movable guide rod (2) is slidably arranged in the movable cavity along the axial direction of the shell (1) and is used for cutting the magnetic induction line to generate damping force, and the extending end of the movable guide rod (2) is used for connecting a structure to be damped;

the guide assembly (4) is arranged between the movable guide rod (2) and the magnetic assembly (3) and is used for reducing the friction force of the movable assembly during movement;

a wind-resistant assembly (5) supporting the housing (1) from the bottom and/or laterally for improving wind resistance.

2. The eddy current damper according to claim 1, wherein the magnetic assembly (3) comprises a plurality of magnets (31) arranged at intervals along the circumferential direction of the housing (1), a magnetic conductive partition (32) arranged between two adjacent magnets (31) in the circumferential direction, and a back iron (33) surrounding the magnets (31) and the magnetic conductive partition (32), and the connecting line direction of the N pole and the S pole of the magnets (31) matches with the radial direction of the movable guide rod (2).

3. The eddy current damper according to claim 2, characterized in that the magnetic assembly (3) further comprises a plurality of magnets (31) arranged at intervals in the axial direction of the housing (1) and a magnetic conductive ring (34) arranged between two adjacent magnets (31) in the axial direction of the housing (1).

4. An eddy current damper according to claim 3, characterized in that the polarities of the same side of two magnets (31) adjacent in the axial direction of the housing (1) are opposite or the polarities of the same side of two magnets (31) adjacent in the circumferential direction are opposite.

5. The eddy current damper according to claim 1, wherein the guiding assembly (4) comprises a plurality of guiding balls (41) which are sequentially arranged in a close manner along the axial direction of the housing (1) and are sequentially arranged at intervals along the circumferential direction, and ball limiting members (42) which are arranged on the magnetic assembly (3) along the axial direction of the housing (1) and surround the guiding balls (41) and are used for limiting the guiding balls (41), wherein the guiding balls (41) are respectively abutted against the magnetic assembly (3) and the movable guide rod (2).

6. The eddy current damper according to claim 1, wherein the wind resistance assembly (5) comprises a base (51) supporting the housing (1) from the bottom, wind resistance rods (52) fixedly arranged on both sides of the base (51), respectively, a connecting rod (53) connected with the wind resistance rods (52), and a clamping block (54) fixedly arranged on the connecting rod (53) and abutted against the side wall of the housing (1), and the wind resistance rods (52), the connecting rod (53), and the clamping block (54) are arranged in a one-to-one correspondence.

7. An eddy current damper according to any one of claims 1 to 6, characterised in that the eddy current damper further comprises a limiting structure (6) arranged between the magnetic assembly (3) and the movable guide rod (2) for limiting the movable guide rod (2).

8. The eddy current damper according to claim 7, wherein the limiting structure (6) comprises a mounting rod radially arranged and fixedly connected with the magnetic assembly (3), a limiting sleeve movably sleeved on the mounting rod, an elastic member sleeved on the mounting rod and arranged between the magnetic assembly (3) and the limiting sleeve, and a limiting groove obliquely arranged on the movable guide rod (2) and used for abutting and limiting with the limiting sleeve.

9. An eddy current damper according to any one of claims 1-6, characterised in that the closed end of the mounting cavity (11) is provided with a resilient cushion (12) supporting the movable guide rod (2).

10. The eddy current damper according to any one of claims 1 to 6, wherein the overhanging end of the movable guide rod (2) is radially provided with a connecting hole (21) for connecting a structure to be damped.