CN113864334A - Rotor device containing electromagnetic device and dynamic air-bearing journal bearing - Google Patents
Rotor device containing electromagnetic device and dynamic air-bearing journal bearing Download PDFInfo
- Publication number
- CN113864334A CN113864334A CN202111122845.4A CN202111122845A CN113864334A CN 113864334 A CN113864334 A CN 113864334A CN 202111122845 A CN202111122845 A CN 202111122845A CN 113864334 A CN113864334 A CN 113864334A
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- CN
- China
- Prior art keywords
- rotor
- dynamic air
- electromagnetic device
- air bearing
- rotating shaft
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 238000005299 abrasion Methods 0.000 abstract description 8
- 230000005484 gravity Effects 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0402—Bearings not otherwise provided for using magnetic or electric supporting means combined with other supporting means, e.g. hybrid bearings with both magnetic and fluid supporting means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
- F16C32/0446—Determination of the actual position of the moving member, e.g. details of sensors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
- F16C32/0451—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
Abstract
A rotor device containing an electromagnetic device and a dynamic air bearing journal bearing comprises the dynamic air bearing, the electromagnetic device and a rotor rotating shaft; the rotor rotating shaft is supported by a plurality of dynamic air bearing; the electromagnetic device is arranged outside the rotor rotating shaft and can attract the rotor rotating shaft. The new scheme of the present invention is to add a ring of electromagnetic devices and corresponding controllers around the rotor. An electromagnetic auxiliary device is installed at the center of gravity of a rotating shaft supported by two air bearings. When the rotor rotates at a low speed, the shaft can be upwards attracted before floating, so that most of the shaft weight is offset, the abrasion of the air bearing is reduced or eliminated, and the service life of the air bearing is prolonged.
Description
Technical Field
The invention belongs to the technical field of rotor structures, and particularly relates to a rotor device comprising an electromagnetic device and a dynamic air bearing journal bearing.
Background
Gas bearings are also known as gas bearings. A sliding bearing using air as a lubricant. In normal operation, the shaft and bearing surfaces are completely separated by a gas film, whereby pressure changes in the film support the shaft and external loads. Because the air has smaller viscosity than oil, high temperature resistance and no pollution, the air bearing can be used in high-speed machines, instruments and radioactive devices, but the load capacity is lower.
The traditional non-platinum dynamic pressure air bearing has the advantage that pressure air does not need to be provided, but the shaft and the shaft sleeve generate friction when the bearing is started and before the bearing stops rotating, so that abrasion is easily caused. The commonly adopted measure for reducing the abrasion is to add a protective layer on the contact surface of the carrier gas floating bearing so as to prolong the service life, but the problem of eccentric friction of the rotor shaft cannot be fundamentally solved.
Disclosure of Invention
The object of the present invention is to provide a rotor arrangement comprising an electromagnetic device and a dynamic air bearing journal bearing to solve the above mentioned problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rotor device containing an electromagnetic device and a dynamic air bearing journal bearing comprises the dynamic air bearing, the electromagnetic device and a rotor rotating shaft; the rotor rotating shaft is supported by a plurality of dynamic air bearing; the electromagnetic device is arranged outside the rotor rotating shaft and can attract the rotor rotating shaft.
Further, the electromagnetic device comprises a supporting frame and an electromagnet; the supporting frame is an annular frame, a plurality of electromagnets are uniformly distributed on the inner side wall of the annular frame, and the rotor rotating shaft is arranged on the inner side of the supporting frame.
Furthermore, a plurality of electromagnets face to the center of the rotor rotating shaft.
Furthermore, the number of the electromagnets is more than three.
Furthermore, the electromagnetic device is externally connected with a controller, and the controller is used for controlling the electromagnetic force.
Furthermore, a displacement sensor is arranged on the rotor rotating shaft and used for measuring the displacement and the deformation of the rotor rotating shaft.
Furthermore, the displacement sensor is connected with the controller.
Furthermore, the dynamic air bearing is provided with a V-shaped groove or a splayed groove on the shaft neck.
Compared with the prior art, the invention has the following technical effects:
the new scheme of the present invention is that one ring of electromagnetic device and corresponding controller are added around the rotor. An electromagnetic auxiliary device is installed at the center of gravity of a rotating shaft supported by two air bearings. When the rotor rotates at a low speed, the shaft can be upwards attracted before floating, so that most of the shaft weight is offset, the abrasion of the air bearing is reduced or eliminated, and the service life of the air bearing is prolonged.
Another function of the electromagnetic device is to adjust the eccentricity of the shaft in the vortex, which is equivalent to increase the rigidity of the bearing, and is helpful for the stability of the rotor in high-speed rotation.
The sensor is added, and the electromagnetic device controller is used for receiving signals of the sensor and then providing required current for each electromagnet as required to counteract the gravity of the rotor, achieve abrasion reduction and adjust the rotation state of the shaft.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of the present invention.
Wherein:
the dynamic air bearing device comprises a dynamic air bearing 2, an electromagnetic device 1, a rotor rotating shaft 3, a supporting frame 4 and an electromagnet 5.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
a rotor system including an electromagnetic device and a dynamic air bearing journal bearing, the rotor system including a shaft having the dynamic air bearing for supporting the shaft, the shaft further having an electromagnetic device for applying a force to the shaft in a non-contact manner from each direction, a controller for the electromagnetic device for controlling the magnitude and direction of the electromagnetic force, and a plurality of sensors for measuring the eccentric position and the vortex state of the shaft, so that the controller for the electromagnetic device can determine the magnitude and direction of the electromagnetic force to be applied according to the information.
The rotating shaft is made of magnetic materials, so that the electromagnet can generate attraction force on the rotating shaft.
The electromagnetic device is provided with a plurality of electromagnets along the circumference, for example, 4 electromagnets are shown in the figure. When different currents are supplied to the electromagnets, the attraction forces to the shaft in different directions can be combined.
At least two air bearings, typically dynamic air bearings, are mounted on the shaft. The dynamic air bearing may have V-shaped grooves on the journal, as shown, or may have a splayed or other surface structure.
Several sensors are mounted on the side of the shaft to measure the displacement and deformation of the shaft.
The electromagnetic device controller is used for receiving signals of the sensor and then providing required current for each electromagnet as required to counteract the gravity of the rotor, achieve abrasion reduction and adjust the rotation state of the shaft.
Specifically, the method comprises the following steps:
a rotor device containing an electromagnetic device and a dynamic air bearing journal bearing comprises a dynamic air bearing 2, an electromagnetic device 1 and a rotor rotating shaft 3; the rotor rotating shaft 3 is supported by a plurality of dynamic air bearing 2; the electromagnetic device 1 is provided outside the rotor rotation shaft 3, and the electromagnetic device 1 can attract the rotor rotation shaft 3.
The electromagnetic device 1 comprises a supporting frame 4 and an electromagnet 5; the supporting frame 4 is an annular frame, the electromagnets 5 are uniformly distributed on the inner side wall of the annular frame, and the rotor rotating shaft 3 is arranged on the inner side of the supporting frame 4.
The number of the electromagnets 5 is four.
The electromagnetic device 1 is externally connected with a controller, and the controller is used for controlling the size of the electromagnet 5.
And a displacement sensor is also arranged on the rotor rotating shaft 3 and used for measuring the displacement and the deformation of the rotor rotating shaft 3.
The displacement sensor is connected with the controller.
The dynamic air bearing is provided with a V-shaped groove or a splayed groove on a shaft neck.
The new scheme of the present invention is that one ring of electromagnetic device and corresponding controller are added around the rotor. As shown in the following figures, an electromagnetic assist device is mounted at the center of gravity of a rotating shaft supported by two air bearings. When the rotor rotates at a low speed, the shaft can be upwards attracted before floating, so that most of the shaft weight is offset, the abrasion of the air bearing is reduced or eliminated, and the service life of the air bearing is prolonged. Another function of the electromagnetic device is to adjust the eccentricity of the shaft in the vortex, which is equivalent to increase the rigidity of the bearing, and is helpful for the stability of the rotor in high-speed rotation.
Example (b):
a rotor device having an electromagnetic device and a dynamic air-floating journal bearing, said rotor device comprising a shaft having a dynamic air-floating bearing for supporting the shaft, an electromagnetic device for applying a force to the shaft in a non-contact manner from each direction, a controller for the electromagnetic device for controlling the magnitude and direction of the electromagnetic force, and a plurality of sensors for measuring the eccentric position and the vortex state of the shaft, so that the controller for the electromagnetic device can determine the magnitude and direction of the electromagnetic force to be applied according to the information.
The rotating shaft is made of magnetic materials, so that the electromagnet can generate attraction force on the rotating shaft.
The electromagnetic device is provided with 4 electromagnets along the circumferential direction. When different currents are supplied to the electromagnets, the attraction forces to the shaft in different directions can be combined.
At least two air bearings, typically dynamic air bearings, are mounted on the shaft. The dynamic air bearing can be provided with V-shaped grooves on the shaft neck, and also can be in a splayed shape or other surface structures.
Several sensors are mounted on the side of the shaft to measure the displacement and deformation of the shaft.
The electromagnetic device controller is used for receiving signals of the sensor and then providing required current for each electromagnet as required to counteract the gravity of the rotor, achieve abrasion reduction and adjust the rotation state of the shaft.
Claims (8)
1. A rotor device containing an electromagnetic device and a dynamic air bearing journal bearing is characterized by comprising a dynamic air bearing (2), an electromagnetic device (1) and a rotor rotating shaft (3); the rotor rotating shaft (3) is supported by a plurality of dynamic air bearing (2); the electromagnetic device (1) is arranged outside the rotor rotating shaft (3), and the electromagnetic device (1) can attract the rotor rotating shaft (3).
2. A rotor device comprising an electromagnetic device and a dynamic air bearing journal bearing according to claim 1, characterized in that the electromagnetic device (1) comprises a support frame (4) and an electromagnet (5); the supporting frame (4) is an annular frame, a plurality of electromagnets (5) are uniformly distributed on the inner side wall of the annular frame, and the rotor rotating shaft (3) is arranged on the inner side of the supporting frame (4).
3. A rotor device comprising an electromagnetic device and a dynamic air bearing journal bearing according to claim 2, characterized in that the electromagnets (5) are directed towards the center of the rotor's axis of rotation (3).
4. A rotor device comprising an electromagnetic device and a dynamic air bearing journal bearing according to claim 2, characterized in that the number of electromagnets (5) is more than three.
5. A rotor device comprising an electromagnetic device and a dynamic air bearing journal bearing according to claim 2, characterized in that the electromagnetic device (1) is externally connected with a controller for controlling the magnitude of the electromagnetic force (5).
6. A rotor device comprising an electromagnetic device and a dynamic air bearing journal bearing according to claim 5, characterized in that the rotor rotation shaft (3) is further provided with a displacement sensor for measuring the displacement and deformation of the rotor rotation shaft (3).
7. A rotor apparatus comprising an electromagnetic apparatus and a dynamic air bearing journal bearing as claimed in claim 6 wherein the displacement sensor is connected to the controller.
8. A rotor assembly comprising an electromagnetic device and a dynamic air bearing journal bearing in accordance with claim 1 wherein the dynamic air bearing journal bearing has V-shaped grooves or splayed grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111122845.4A CN113864334A (en) | 2021-09-24 | 2021-09-24 | Rotor device containing electromagnetic device and dynamic air-bearing journal bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111122845.4A CN113864334A (en) | 2021-09-24 | 2021-09-24 | Rotor device containing electromagnetic device and dynamic air-bearing journal bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113864334A true CN113864334A (en) | 2021-12-31 |
Family
ID=78993919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111122845.4A Pending CN113864334A (en) | 2021-09-24 | 2021-09-24 | Rotor device containing electromagnetic device and dynamic air-bearing journal bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113864334A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1019042A (en) * | 1996-06-28 | 1998-01-20 | Shimadzu Corp | Magnetic bearing device |
| CN101910657A (en) * | 2007-10-23 | 2010-12-08 | 韩国科学技术研究院 | Airfoil-magnetic hybrid bearing and control system thereof |
| CN103245504A (en) * | 2013-04-10 | 2013-08-14 | 浙江工业大学 | Device for testing lateral resistance of air floatation bearing |
| CN106545574A (en) * | 2016-10-27 | 2017-03-29 | 上海交通大学 | A kind of oscillation crosswise control device of cardan shaft |
| CN106640966A (en) * | 2017-02-17 | 2017-05-10 | 燕山大学 | Magnetic fluid double suspension driving and driven radial bearing |
| CN111457010A (en) * | 2020-03-24 | 2020-07-28 | 北京科技大学 | Magnetic-gas hybrid bearing |
-
2021
- 2021-09-24 CN CN202111122845.4A patent/CN113864334A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1019042A (en) * | 1996-06-28 | 1998-01-20 | Shimadzu Corp | Magnetic bearing device |
| CN101910657A (en) * | 2007-10-23 | 2010-12-08 | 韩国科学技术研究院 | Airfoil-magnetic hybrid bearing and control system thereof |
| CN103245504A (en) * | 2013-04-10 | 2013-08-14 | 浙江工业大学 | Device for testing lateral resistance of air floatation bearing |
| CN106545574A (en) * | 2016-10-27 | 2017-03-29 | 上海交通大学 | A kind of oscillation crosswise control device of cardan shaft |
| CN106640966A (en) * | 2017-02-17 | 2017-05-10 | 燕山大学 | Magnetic fluid double suspension driving and driven radial bearing |
| CN111457010A (en) * | 2020-03-24 | 2020-07-28 | 北京科技大学 | Magnetic-gas hybrid bearing |
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