CN112211939A - Damping device - Google Patents
Damping device Download PDFInfo
- Publication number
- CN112211939A CN112211939A CN202011192588.7A CN202011192588A CN112211939A CN 112211939 A CN112211939 A CN 112211939A CN 202011192588 A CN202011192588 A CN 202011192588A CN 112211939 A CN112211939 A CN 112211939A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- magnet ring
- bearing
- ring
- supporting seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
Abstract
The present invention provides a damping device comprising: the device comprises a rotating shaft, a thin shaft support, a bearing supporting seat, an inner permanent magnet ring, an outer permanent magnet ring block, an outer magnetic ring supporting seat, SMA wires, balls, a base and a rolling bearing; the lower end of the thin shaft support is connected with the bearing support seat, the upper end of the thin shaft support is fixed on the equipment shell, and the upper end of the thin shaft support is still during working; the inner hole of the bearing supporting seat is provided with a rolling bearing, and the outer shaft is provided with an inner permanent magnetic ring; the inner permanent magnetic ring is magnetized in the radial direction and is arranged on the outer diameter of the bearing support seat; the outer permanent magnet ring blocks are magnetized in the radial direction, the radial magnetizing direction is opposite to the magnetizing direction of the inner permanent magnet ring, and the outer permanent magnet ring blocks and the inner permanent magnet ring generate a mutual repulsive force; an outer magnetic ring supporting seat, an outer permanent magnetic ring block is fixed on the inner ring surface, and SMA wires are uniformly wound on the outer ring surface; the SMA wires are uniformly wound on the outer diameters of the 6 outer magnetic ring supporting seats and bear certain tensile stress in advance after assembly; the ball is arranged in the cylindrical hole of the base; the base is fixed on the equipment shell; the rolling bearing comprises an angular contact ball bearing and a deep groove ball bearing.
Description
Technical Field
The invention relates to the technical field of equipment manufacturing, in particular to a damping device for vibration reduction of a high-speed rotating mechanical rotor.
Background
Because various rotating machines such as centrifuges, turbines, energy storage flywheels and the like need to work above the low-order critical speed of the system due to the high working speed, namely, need to work beyond the resonance point, in order to ensure that the rotor-bearing system can successfully cross the resonance point, a damping device must be additionally arranged in the system for dissipating the redundant energy when the system crosses the resonance point.
The most common damper is an extrusion oil film damper, although the price is low, the working environment is poor and the environment is not protected due to the use of lubricating oil; the electromagnetic damper needs an external power supply, control and system, so that the cost is too high, and the electromagnetic damper is inconvenient for engineering application.
Disclosure of Invention
The present invention provides a damping device comprising: the device comprises a rotating shaft, a thin shaft support, a bearing supporting seat, an inner permanent magnet ring, an outer permanent magnet ring block, an outer magnetic ring supporting seat, SMA wires, balls, a base and a rolling bearing; the lower end of the thin shaft support is connected with the bearing support seat, the upper end of the thin shaft support is fixed on the equipment shell, and the upper end of the thin shaft support is still during working; the inner hole of the bearing supporting seat is provided with the rolling bearing, and the outer shaft is provided with the inner permanent magnetic ring; the inner permanent magnetic ring is magnetized in the radial direction and is arranged on the outer diameter of the bearing support seat; the outer permanent magnet ring blocks are magnetized in the radial direction, the radial magnetizing direction is opposite to the magnetizing direction of the inner permanent magnet ring, and the outer permanent magnet ring blocks and the inner permanent magnet ring generate a mutual repulsive force; the outer permanent magnet ring blocks are fixed on the inner ring surface of the outer magnetic ring supporting seat, and the SMA wires are uniformly wound on the outer ring surface; the SMA wires are uniformly wound on the outer diameters of the 6 outer magnetic ring supporting seats and bear certain tensile stress in advance after assembly; the ball is arranged in the cylindrical hole of the base; the base is fixed on the equipment shell; the rolling bearing comprises an angular contact ball bearing and a deep groove ball bearing.
In the above scheme, the thin shaft support and the bearing support seat are integrally formed.
In the above scheme, the material of the rotating shaft comprises a ferrous metal material.
In the scheme, the thin shaft supporting material comprises a stainless steel wire and a spring steel wire; and the thin shaft supporting materials are uniformly distributed along the circumferential direction of the bearing supporting seat.
In the scheme, the bearing supporting seat is supported and fixed by the uniformly distributed thin shafts, and the bearing supporting seat and the inner permanent magnet ring swing during working.
In the scheme, the inner permanent magnet ring material comprises Nd-Fe-B.
In the scheme, the outer permanent magnet ring blocks comprise 6 ring blocks which are connected to the outer magnet ring supporting seat through glue, a mutual repulsive force is generated between the outer permanent magnet ring blocks and the inner permanent magnet ring blocks, and the outer permanent magnet ring blocks are made of Nd-Fe-B.
In the above scheme, the SMA wire comprises a shape memory alloy, and the material comprises a NiTi alloy wire, the diameter of which comprises 1 mm.
In the scheme, the highest point of the ball is 0.1mm higher than the plane of the base.
In the above scheme, the base evenly sets up 6T type grooves along the circumferencial direction, the base material is including non-magnetic, conducting material.
The damping device provided by the invention adopts the permanent magnet rings which are radially magnetized and interact with each other to provide power, when the rotating speed of the rotating shaft is far away from the critical rotating speed to work, the amplitude of the rotating shaft is very small, so that the amplitude of the inner permanent magnet ring connected with the rotating shaft is also very small, namely the change of an air gap value between the inner permanent magnet ring and the outer permanent magnet ring block is not large, the acting force between the inner permanent magnet ring and the outer permanent magnet ring block is relatively small, and the outer magnet ring supporting seat is still under the action of the pretightening force of the SMA coil. At the moment, the inner permanent magnet ring and the outer permanent magnet ring are equivalent to a radial permanent magnet bearing, approximately unchanged rigidity radial support is provided for a rotating system, the system does not dissipate energy, and the efficiency of a mechanical system is further improved. When the system needs to cross the critical rotating speed to reach the working rotating speed (high speed), namely the mechanical system crosses the resonance point, the damping necessary for safe operation can be provided, so that the safety and the stability of the system are increased; on the other hand, the induced current generated by the magnetic field change caused by the repeated movement of the magnetic ring generates heat, and further provides damping for the system. The device has the outstanding advantages of no need of active control, environmental friendliness, no contact and easiness in maintenance and installation.
Drawings
FIG. 1 is a cross-sectional view of a damping device according to an embodiment of the present invention;
FIG. 2 is a schematic plan view of a damping device according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along the line C-C of FIG. 1;
fig. 4 is a partially enlarged view of the region F in fig. 1.
Detailed Description
So that the manner in which the features and aspects of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings.
The present invention provides a damping device, as shown in fig. 1-4, fig. 1 is a cross-sectional view of a damping device provided in an embodiment of the present invention; FIG. 2 is a schematic plan view of a damping device according to an embodiment of the present invention; FIG. 3 is a cross-sectional view taken along the line C-C of FIG. 1; fig. 4 is a partially enlarged view of the region F in fig. 1. The damping device includes: the device comprises a rotating shaft 1, a thin shaft support 2, a bearing supporting seat 3, an inner permanent magnet ring 4, an outer permanent magnet ring block 5, an outer magnet ring supporting seat 6, an SMA wire 7, a ball 8, a base 9 and a rolling bearing 10; the lower end of the thin shaft support 2 is connected with the bearing support seat 3, the upper end of the thin shaft support is fixed on the equipment shell, and the upper end of the thin shaft support is still during working; the inner hole of the bearing support 3 is provided with the rolling bearing 10, and the outer shaft is provided with the inner permanent magnetic ring 4; the inner permanent magnetic ring 4 is magnetized in the radial direction and is arranged on the outer diameter of the bearing support 3; the outer permanent magnet ring blocks 5 are magnetized in the radial direction, the magnetizing direction of the outer permanent magnet ring blocks is opposite to that of the inner permanent magnet ring 4, and the outer permanent magnet ring blocks 5 and the inner permanent magnet ring 4 generate a mutual repulsive force; the outer permanent magnet ring blocks 5 are fixed on the inner ring surface of the outer magnetic ring supporting seat 6, and the SMA wires 7 are uniformly wound on the outer ring surface; the SMA wires 7 are uniformly wound on the outer diameters of the 6 outer magnetic ring supporting seats 6, and bear certain tensile stress in advance after assembly; the ball 8 is arranged in the cylindrical hole of the base 9; the base 9 is fixed on the equipment shell; the rolling bearing 10 includes an angular contact ball bearing and a deep groove ball bearing.
Alternatively, the thin shaft support 2 is integrally formed with the bearing support 3.
Optionally, the material of the rotating shaft 1 comprises a ferrous metal material.
Optionally, the thin shaft support 2 material comprises stainless steel wires and spring steel wires; the thin shaft support 2 is made of materials which are uniformly distributed along the circumferential direction of the bearing support 3.
Optionally, the bearing support 3 is fixed by uniformly distributed thin shaft supports 2, and the bearing support 3 and the inner permanent magnet ring 4 swing during operation.
Optionally, the material of the inner permanent magnet ring 4 comprises Nd-Fe-B.
Optionally, the outer permanent magnet ring 5 includes 6 ring blocks, the 6 ring blocks are bonded to the outer magnet ring support base 6 through glue, a mutual repulsive force is generated between the outer permanent magnet ring block and the inner permanent magnet ring, and the outer permanent magnet ring 5 is made of Nd-Fe-B.
Alternatively, the SMA wires 7 comprise a shape memory alloy and the material comprises NiTi alloy wires, the diameter comprising 1 mm.
Optionally, the highest point of the ball 8 is 0.1mm higher than the plane of the base 9.
Optionally, the base 9 is uniformly provided with 6T-shaped grooves along the circumferential direction, and the material of the base 9 includes a non-magnetic conductive material and a conductive material.
In an alternative embodiment provided by the present invention, a damping device comprises: the rotating shaft 1 provides a power source and is connected with a motor rotor; the thin shaft supports 2 are made of stainless steel wires, the lower ends of the thin shaft supports are connected with the bearing support seats 3 and integrated with the bearing support seats 3, the upper ends of the thin shaft supports are fixed on the equipment shell, the upper ends of the thin shaft supports are static during working, and the four thin shaft supports 2 are uniformly distributed on the bearing support seats along the circumferential direction; the bearing supporting seat 3 is made of No. 45 steel, an inner hole is used for mounting a rolling bearing 10, an outer shaft is used for mounting an inner permanent magnet ring 4, the bearing supporting seat 3 and the inner permanent magnet ring 4 mounted on the bearing supporting seat only swing and do not rotate when in work due to the fact that the thin shaft supports 2 are uniformly distributed and fixed, and therefore unstable self-excited vibration caused to a system due to the rotation of the bearing supporting seat 3 is avoided; the inner permanent magnetic ring 4 adopts an integral annular structure, is magnetized in the radial direction and is arranged on the outer diameter of the bearing support 3; the outer permanent magnet ring block 5 consists of six ring blocks, is connected to the outer magnet ring supporting seat 6 through glue, adopts radial magnetization, the radial magnetization direction is opposite to the magnetization direction of the inner permanent magnet ring 4, and after the outer permanent magnet ring block 5 is installed, a mutual repulsion force is generated between the inner permanent magnet ring 4 and the outer permanent magnet ring block 5; the outer magnetic ring supporting seat 6 is processed by No. 45 steel, an inner ring surface fixes an outer permanent magnetic ring block 5 in an adhesive mode, SMA wires 7 are uniformly wound on an outer ring surface, the outer ring surface is installed in a T-shaped groove of the base through a T-shaped step, the outer magnetic ring supporting seat 6 has a limit position away from a rotation center, the outer magnetic ring supporting seat 6 can only move in a translation mode from the limit position along a direction far away from the rotation center, but cannot be separated from the base due to the limitation of the T-shaped step; the SMA wire 7, namely the shape memory alloy, has the superelastic damping energy dissipation function, is made of a NiTi alloy wire with the diameter of 1mm, is uniformly wound on the outer diameters of six outer magnetic ring supporting seats 6, is subjected to certain tensile stress in advance after assembly, and depends on the structural parameters and the working rotating speed of a rotating system as to the number of turns of winding; the balls 8 and 36 balls 8 are made of ferrite stainless steel materials and are arranged in the cylindrical hole of the base 9, the highest point of each ball 8 is 0.1mm higher than the plane of the base 9, so that the plane between the outer magnetic ring supporting seat 6 and the base 9 after installation is not contacted, and the flexibility of the movement of the outer magnetic ring supporting seat 6 is improved; the base 9 is made of non-magnetic brass, is fixed on the equipment shell, is fixed during working, and is uniformly provided with 6T-shaped grooves along the circumferential direction for mounting the outer magnetic ring supporting seat 6; the rolling bearing 10 is selected according to the diameter of the rotating shaft, if the axial bearing capacity of the bearing is large, an angular contact ball bearing is adopted, and if the axial bearing capacity is not large, a deep groove ball bearing can be adopted.
After the technical scheme is adopted, when the rotating speed of the rotating shaft 1 is far away from the critical rotating speed to work, the amplitude of the rotating shaft 1 is small, so that the amplitude of the inner permanent magnet ring 4 connected with the rotating shaft is also small, namely the change of the air gap values between the inner permanent magnet ring 4 and the six outer permanent magnet ring blocks 5 is not large, and the outer magnet ring supporting seat 6 is static under the action of the pretightening force of the SMA wire 7 because the acting force between the inner ring and the outer ring of the bearing is small. At the moment, the inner permanent magnet ring 4 and the six outer permanent magnet ring blocks 5 are equivalent to a radial permanent magnet bearing, radial support with low rigidity is provided for a rotating system, and at the moment, the device does not dissipate energy, namely, damping is not provided for the system.
When the rotating speed of the rotating shaft 1 approaches or needs to cross the critical rotating speed of the system, the amplitude of the inner permanent magnet ring 4 (or the rotating shaft 1) is large, air gaps between the inner permanent magnet ring 4 and the six outer permanent magnet ring blocks 5 caused by the amplitude are not uniform any more, the outer permanent magnet ring blocks 5 (or the outer magnet ring supporting seats 6) at the positions with the small air gaps are acted by force and move along the direction far away from the rotation center, and the outer permanent magnet ring blocks 5 (or the outer magnet ring supporting seats 6) at the positions with the large air gaps are still because of the limitation of the limit positions. The damping device can provide damping for the system in two ways: on one hand, the multi-turn SMA wire 7 wound on the outer magnetic ring supporting seat 6 is repeatedly elongated along with the rotation of the rotating shaft 1 with larger amplitude, and because the SMA wire 7 has a superelasticity damping energy dissipation function, internal loss is generated in the repeated elongation process, so that damping is provided for the system. On the other hand, the six outer permanent magnet ring blocks 5 reciprocate on the base 9, which causes the change of the magnetic field, and leads to the generation of induced current on the base 9 made of conductive material, thereby generating heat, and further providing damping for the system.
The damping device provided by the invention adopts the permanent magnet rings which are radially magnetized and interact with each other to provide power, when the rotating speed of the rotating shaft is far away from the critical rotating speed to work, the amplitude of the rotating shaft is very small, so that the amplitude of the inner permanent magnet ring connected with the rotating shaft is also very small, namely the change of an air gap value between the inner permanent magnet ring and the outer permanent magnet ring block is not large, the acting force between the inner permanent magnet ring and the outer permanent magnet ring block is relatively small, and the outer magnet ring supporting seat is still under the action of the pretightening force of the SMA coil. At the moment, the inner permanent magnet ring and the outer permanent magnet ring are equivalent to a radial permanent magnet bearing, approximately unchanged rigidity radial support is provided for a rotating system, the system does not dissipate energy, and the efficiency of a mechanical system is further improved. When the system needs to cross the critical rotating speed to reach the working rotating speed (high speed), namely the mechanical system crosses the resonance point, the damping necessary for safe operation can be provided, so that the safety and the stability of the system are increased; on the other hand, the induced current generated by the magnetic field change caused by the repeated movement of the magnetic ring generates heat, and further provides damping for the system. The device has the outstanding advantages of no need of active control, environmental friendliness, no contact and easiness in maintenance and installation.
As described above, the present invention is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and the present invention shall be covered thereby. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A damping device, characterized in that it comprises:
the device comprises a rotating shaft, a thin shaft support, a bearing supporting seat, an inner permanent magnet ring, an outer permanent magnet ring block, an outer magnetic ring supporting seat, SMA wires, balls, a base and a rolling bearing;
the lower end of the thin shaft support is connected with the bearing support seat, the upper end of the thin shaft support is fixed on the equipment shell, and the upper end of the thin shaft support is still during working;
the inner hole of the bearing supporting seat is provided with the rolling bearing, and the outer shaft is provided with the inner permanent magnetic ring;
the inner permanent magnetic ring is magnetized in the radial direction and is arranged on the outer diameter of the bearing support seat;
the outer permanent magnet ring blocks are magnetized in the radial direction, the radial magnetizing direction is opposite to the radial magnetizing direction of the inner permanent magnet ring, and the outer permanent magnet ring blocks and the inner permanent magnet ring generate a mutual repulsive force;
the inner ring surface of the outer magnetic ring supporting seat is fixed with the outer permanent magnetic ring block, and the SMA wires are uniformly wound on the outer ring surface;
the SMA wires are uniformly wound on the outer diameters of the 6 outer magnetic ring supporting seats and bear certain tensile stress in advance after assembly;
the ball is arranged in the cylindrical hole of the base;
the base is fixed on the equipment shell;
the rolling bearing comprises an angular contact ball bearing and a deep groove ball bearing.
2. The damping device of claim 1, wherein the thin shaft support is integrally formed with the bearing support.
3. The damper device of claim 1, wherein the shaft material comprises a ferrous metal material.
4. The damper device of claim 1, wherein the fine shaft support material comprises a stainless steel wire, a spring steel wire; and the thin shaft supporting materials are uniformly distributed along the circumferential direction of the bearing supporting seat.
5. The damping device of claim 1, wherein the bearing support is supported and fixed by a thin shaft, and the bearing support and the inner permanent magnet ring oscillate during operation.
6. The damping device of claim 1, wherein the inner permanent magnet ring material comprises Nd-Fe-B.
7. The damper device according to claim 1, wherein said outer permanent magnet ring segments comprise 6 ring segments, and are bonded to said outer magnet ring support by gluing, said outer permanent magnet ring segments and said inner permanent magnet ring segments generating a repulsive force therebetween, said outer permanent magnet ring segments comprising Nd-Fe-B.
8. A damping device according to claim 1, wherein said SMA wires comprise a shape memory alloy and the material comprises NiTi alloy wires and the diameter comprises 1 mm.
9. The damper device of claim 1, wherein the ball apex is 0.1mm higher than the base plane.
10. The damper device of claim 1, wherein the base is uniformly provided with 6T-shaped grooves along a circumferential direction, and the base material comprises a non-magnetic and conductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192588.7A CN112211939A (en) | 2020-10-30 | 2020-10-30 | Damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192588.7A CN112211939A (en) | 2020-10-30 | 2020-10-30 | Damping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112211939A true CN112211939A (en) | 2021-01-12 |
Family
ID=74057781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011192588.7A Pending CN112211939A (en) | 2020-10-30 | 2020-10-30 | Damping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112211939A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199705A (en) * | 2022-05-31 | 2022-10-18 | 北京信息科技大学 | Multifunctional energy storage flywheel system with damping energy recovery and online modal monitoring functions |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2462139Y (en) * | 2001-01-16 | 2001-11-28 | 浙江大学 | Rigid and damping virable electromagnetic bearing for high speed rotary mechanism |
| CN1609471A (en) * | 2004-11-04 | 2005-04-27 | 浙江大学 | Electric eddy-current damping device for rotary machine rotor |
| CN203702863U (en) * | 2014-01-02 | 2014-07-09 | 上海大学 | Permanent magnet suspension bearing with radial repulsive force |
| CN104455200A (en) * | 2014-12-23 | 2015-03-25 | 江苏理工学院 | Squeeze film damper with floating magnetic ring |
| CN104455143A (en) * | 2014-12-23 | 2015-03-25 | 江苏理工学院 | Magnetic damper with floating magnetic ring |
| US20170219045A1 (en) * | 2014-08-13 | 2017-08-03 | Esm Energie-Und Schwingungstechnik Mitsch Gmbh | Magnetic damper for vibration absorbers |
| CN108443320A (en) * | 2018-04-02 | 2018-08-24 | 江苏理工学院 | A kind of variation rigidity radial permanent magnet bearing |
-
2020
- 2020-10-30 CN CN202011192588.7A patent/CN112211939A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2462139Y (en) * | 2001-01-16 | 2001-11-28 | 浙江大学 | Rigid and damping virable electromagnetic bearing for high speed rotary mechanism |
| CN1609471A (en) * | 2004-11-04 | 2005-04-27 | 浙江大学 | Electric eddy-current damping device for rotary machine rotor |
| CN203702863U (en) * | 2014-01-02 | 2014-07-09 | 上海大学 | Permanent magnet suspension bearing with radial repulsive force |
| US20170219045A1 (en) * | 2014-08-13 | 2017-08-03 | Esm Energie-Und Schwingungstechnik Mitsch Gmbh | Magnetic damper for vibration absorbers |
| CN104455200A (en) * | 2014-12-23 | 2015-03-25 | 江苏理工学院 | Squeeze film damper with floating magnetic ring |
| CN104455143A (en) * | 2014-12-23 | 2015-03-25 | 江苏理工学院 | Magnetic damper with floating magnetic ring |
| CN108443320A (en) * | 2018-04-02 | 2018-08-24 | 江苏理工学院 | A kind of variation rigidity radial permanent magnet bearing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199705A (en) * | 2022-05-31 | 2022-10-18 | 北京信息科技大学 | Multifunctional energy storage flywheel system with damping energy recovery and online modal monitoring functions |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7902706B2 (en) | Rotational apparatus including a passive magnetic bearing | |
| EP3186872B1 (en) | High power flywheel system | |
| CN102148592A (en) | Magnetic suspension support structure used for vertical hub-disk motor | |
| CN108591257A (en) | Permanent magnet biased axial magnetic suspension bearing with radial driven suspension power | |
| CN109904957B (en) | A kind of magnetic suspension motor rotor and its processing technology | |
| CN104836408A (en) | Six degrees of freedom permanent magnet synchronous magnetic suspension spherical motor | |
| JP2011099518A (en) | Fluid dynamic pressure bearing, spindle motor, and disk drive device | |
| GB2531751A (en) | Bearing assembly with integrated generator | |
| CN112211939A (en) | Damping device | |
| WO2007048273A1 (en) | Electromagnetic suspension bearing | |
| JP2010218628A (en) | Disk driving device | |
| CN109681525B (en) | Magnetic suspension bearing and motor | |
| JP2020501490A (en) | Improvement of rotating generator | |
| CN101119047A (en) | High temperature superconducting magnetic suspension frequency conversion electric motor | |
| CN102537048A (en) | Axial magnetic bearing capable of controlling radial twisting | |
| CN103591139A (en) | Passive radial permanent magnetic bearing for high-speed rotor | |
| US20040227421A1 (en) | Magnetic suspension bearing | |
| JPWO2017158710A1 (en) | Flywheel device and rotating electric machine | |
| CN107093938B (en) | Magnetic suspension motor and household air conditioner | |
| CN107387172B (en) | Vertical double-stage permanent magnet gas suspension ORC waste heat generator | |
| JP5095329B2 (en) | Motor and blower fan | |
| JP2016039733A (en) | Flywheel device, and power generation and drive motor device | |
| CN104454991B (en) | Self induction magnetic bearing | |
| JP3215881U (en) | Flywheel device and rotating electric machine | |
| JP2001045704A (en) | Flywheel device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210112 |
|
| RJ01 | Rejection of invention patent application after publication |