CN210799841U

CN210799841U - Cylinder type electromagnetic eddy current damper

Info

Publication number: CN210799841U
Application number: CN201921785749.6U
Authority: CN
Inventors: 郝虎只; 李丹
Original assignee: Huazhongjianke Beijing Engineering Technology Co ltd
Current assignee: Huazhong Seismic Control Anyang Technology Co ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-06-19
Anticipated expiration: 2029-10-22

Abstract

A cylinder type electromagnetic eddy current damper effectively solves the problem that a mechanical rotating shaft is damaged or the service life of the mechanical rotating shaft is reduced due to vibration; the electromagnetic clutch comprises a sleeve in the vertical axial direction, wherein rotary grooves communicated with the interior of the sleeve are coaxially formed in the upper end face and the lower end face of the sleeve respectively, a rolling bearing is coaxially arranged in the sleeve, a plurality of electromagnets which are uniformly distributed along the circumferential direction of the sleeve and in the vertical direction are fixed on the inner edge face of the sleeve, a plurality of arc-shaped plates which are located between the rolling bearing and the electromagnets and correspond to the electromagnets one by one are arranged in the sleeve, each arc-shaped plate is composed of a plurality of arc-shaped blocks which are uniformly distributed along the vertical direction, every two arc-shaped blocks which are adjacent up and down are connected in a detachable mode, two flat radial springs are arranged on each arc-shaped block, each electromagnet is located between two flat radial springs; the structure is simple, the operation is convenient, the conception is novel, and the practicability is strong.

Description

Cylinder type electromagnetic eddy current damper

Technical Field

The utility model relates to a attenuator technical field, concretely relates to cylinder electromagnetic eddy current damper.

Background

In the process of high-speed operation of a mechanical rotating shaft, the mass center of each micro-section of the rotating shaft in a rotating system cannot be strictly positioned on the rotating shaft, so that when the rotating shaft rotates, transverse interference occurs, strong vibration of the system can be caused at certain rotating speeds, and in order to ensure normal operation of the system and prolong the service life of the rotating shaft, a damper is usually adopted to reduce the vibration.

SUMMERY OF THE UTILITY MODEL

To the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a cylindrical electromagnetic eddy current damper, which effectively solves the problem of damage or life reduction of a mechanical rotating shaft due to vibration.

The technical scheme of its solution is, the utility model discloses an upper and lower axial sleeve, the rotation groove rather than inside intercommunication is coaxially seted up on the face of both ends about the sleeve respectively, coaxial antifriction bearing that is equipped with in the sleeve, be fixed with a plurality of electro-magnets along its circumferencial direction equipartition and upper and lower direction on the sleeve inner fringe face, be equipped with a plurality of arc that are located between antifriction bearing and the electro-magnet and with the electro-magnet one-to-one in the sleeve, every arc comprises a plurality of arc pieces along upper and lower direction equipartition, dismantle the connection between every two adjacent arc pieces from top to bottom, all be equipped with two dull and stereotyped radial spring on every arc piece, every electro-magnet all is located between two dull and stereotyped radial spring of its corresponding side, dull and stereotyped radial.

Compared with the prior art, the beneficial effects of the utility model are that: it is rational in infrastructure, convenient to use sets up electro-magnet, antifriction bearing, arc piece, radial spring, makes this device can alleviate the vibration range of pivot when vibrations, accords with the big damping high frequency of low frequency little damped characteristic that the pivot required, sets up slider, spout, dovetail, connecting block simultaneously, makes this device can adjust damped size according to the demand, this simple structure, and convenient operation conceives the novelty, and the practicality is strong.

Drawings

Fig. 1 is an isometric view of the present invention.

Figure 2 is the overhead axonometric view of the partial section of the utility model.

Figure 3 is the utility model discloses a partially cut owner and look axonometric drawing.

Figure 4 is the utility model discloses a partially cut owner and look axonometric drawing.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

By figure 1 to 4 and give, axial sleeve 1 about including, the rotation groove 2 rather than inside intercommunication is seted up to the coaxial respectively on the both ends face about sleeve 1, the coaxial antifriction bearing 3 that is equipped with in sleeve 1, be fixed with a plurality of electro-magnet 4 along its circumferencial direction equipartition and upper and lower direction on the sleeve 1 inner fringe face, be equipped with a plurality of arc that lie in between antifriction bearing 3 and the electro-magnet 4 and with electro-magnet 4 one-to-one in the sleeve 1, every arc comprises a plurality of arc blocks 5 along upper and lower direction equipartition, dismantle the connection between every two adjacent arc blocks 5 from top to bottom, all be equipped with two dull and stereotyped radial spring 6 on every arc block 5, every electro-magnet 4 all is located between two dull and stereotyped radial spring 6 of its corresponding side, dull and stereotyped radial spring 6 and sleeve 1 fixed connection of downside.

In order to make two adjacent arc blocks 5 separable, the outer edge surface of the sleeve 1 on coaxially provided with an annular placing groove 7, the inner side wall of the placing groove 7 is provided with a plurality of sliding grooves 8 which are communicated with the inside of the sleeve 1 and are in the vertical direction, each sliding groove 8 is internally provided with a plurality of sliding blocks 9 which are in one-to-one correspondence with the flat radial springs 6 and of which the outer surfaces extend out of the sliding grooves 8, and the inner surface of each sliding block 9 is fixedly connected with the flat radial springs 6 on the corresponding side.

In order to enable the two adjacent arc-shaped blocks 5 to be detached and connected, dovetail grooves 11 are formed in opposite ends of every two vertically adjacent sliding blocks 9, openings of every two adjacent dovetail grooves 11 are opposite and penetrate through the outer surfaces of the sliding blocks 9 on the corresponding sides, and connecting blocks 10 are detachably connected in every two adjacent dovetail grooves 11.

In order to facilitate the dovetail block 12 to be removed from the dovetail groove 11, a skid-proof bump 13 is provided on each connecting block 10.

In order to increase the stability of the sliding blocks 9, a plurality of arc-shaped baffles 14 uniformly distributed along the circumferential direction of the sliding blocks are coaxially arranged in the placing groove 7, the arc-shaped baffles 14 and the sliding grooves 8 are distributed in a staggered manner, and a limiting block 15 positioned between the inner side wall of the placing groove 7 and the arc-shaped baffles 14 is fixed on each sliding block 9.

In order to prevent the electromagnet 4 from damping the arc-shaped block 5 when the arc-shaped block 5 is not in contact with the rolling bearing 3, the length of the electromagnet 4 is the same as that of the rolling bearing 3.

When the utility model is used, the electromagnet 4 is always in the power-on state, the direct current excitation voltage with the same magnitude is applied to each magnet coil, the mechanical rotating shaft is put into the rolling bearing 3 through the rotating groove 2 on the lower side, so that the rotating shaft is in close contact with the rolling bearing 3, and when the device is used, one end inserted into the rotating shaft is upwards or horizontally placed;

when the rotating shaft rotates or approaches critical rotating speed, the rotating shaft vibrates, the rotating shaft drives the rolling bearing 3 to vibrate at the moment, the rolling bearing 3 drives the arc-shaped block 5 to swing and extrude the flat radial spring 6 on the corresponding side of the arc-shaped block, at the moment, because of a magnetic field generated by the electromagnet 4, eddy current is generated on the swinging arc-shaped block 5, the direction of the eddy current under the action of the magnetic field is always opposite to the swinging direction, so that the damping of the arc-shaped block 5 is increased, meanwhile, the arc-shaped block 5 is quickly recovered and stabilized due to the rigidity support of the spring, the rotating shaft is quickly recovered and stabilized by the arc-shaped block 5 through the rolling bearing 3;

if the damping of the device needs to be adjusted, the dovetail-shaped blocks 12 with the same height are pulled out from the dovetail grooves 11 through the connecting blocks 10, the two adjacent sliding blocks 9 are released from being fixed, the sliding blocks 9 with the same height move upwards, the sliding blocks 9 drive the arc-shaped blocks 5 on the corresponding sides to move upwards through the flat radial springs 6, so that the sliding blocks are not in contact with the rolling bearings 3, the insertion ends of the rotating shafts are upwards or horizontally placed when the device is used, the moved arc-shaped blocks 5 cannot be restored to the initial positions due to self gravity, and the damping of the device is reduced at the moment;

if the damping is increased, the moved slide blocks 9 are restored to the initial positions, the connecting blocks 10 are inserted into the dovetail grooves 11 on the corresponding sides of the slide blocks again, and the two adjacent slide blocks 9 are fixed, so that the damping of the device is increased, and the damping of the device can be regulated and controlled by controlling the voltage connected to the magnet coils;

Claims

1. A cylinder type electromagnetic eddy current damper comprises a sleeve (1) which is axial up and down, and is characterized in that a rotating groove (2) communicated with the inside of the sleeve (1) is coaxially arranged on the upper end face and the lower end face of the sleeve (1) respectively, a rolling bearing (3) is coaxially arranged in the sleeve (1), a plurality of electromagnets (4) which are uniformly distributed along the circumferential direction and are vertical to the inner edge face of the sleeve (1) are fixed on the inner edge face of the sleeve (1), a plurality of arc-shaped plates which are positioned between the rolling bearing (3) and the electromagnets (4) and correspond to the electromagnets (4) one by one are arranged in the sleeve (1), each arc-shaped plate consists of a plurality of arc-shaped blocks (5) which are uniformly distributed along the vertical direction, every two arc-shaped blocks (5) which are adjacent up and down are connected in a dismounting way, two flat radial springs (6) are arranged on each arc-shaped block (, the plate radial spring (6) at the lowest side is fixedly connected with the sleeve (1).

2. A cylindrical electromagnetic eddy current damper according to claim 1, characterized in that the outer edge surface of the sleeve (1) is coaxially provided with an annular placing groove (7), the inner side wall of the placing groove (7) is provided with a plurality of sliding grooves (8) which are communicated with the interior of the sleeve (1) and are in the vertical direction, each sliding groove (8) is internally and slidably connected with a plurality of sliding blocks (9) which are in one-to-one correspondence with the flat radial springs (6) and of which the outer surfaces extend out of the sliding grooves (8), and the inner surface of each sliding block (9) is fixedly connected with the flat radial springs (6) on the corresponding side.

3. A cylindrical electromagnetic eddy current damper according to claim 2, characterized in that the opposite ends of every two vertically adjacent sliding blocks (9) are provided with dovetail grooves (11), every two adjacent dovetail grooves (11) are provided with opposite openings and penetrate through the outer surfaces of the sliding blocks (9) on the corresponding sides, and connecting blocks (10) are detachably connected in every two adjacent dovetail grooves (11).

4. A cylindrical eddy-current electromagnetic damper according to claim 3, characterized in that each of said connecting blocks (10) is provided with anti-slip projections (13).

5. A barrel type electromagnetic eddy current damper according to claim 2, characterized in that a plurality of arc-shaped baffles (14) uniformly distributed along the circumferential direction are coaxially arranged in the placing groove (7), the arc-shaped baffles (14) and the sliding groove (8) are distributed in a staggered manner, and a limiting block (15) positioned between the inner side wall of the placing groove (7) and the arc-shaped baffles (14) is fixed on each sliding block (9).

6. A barrel-type electromagnetic eddy current damper according to claim 1, characterized in that the length of the electromagnet (4) is the same as the length of the rolling bearing (3).