CN100587283C - Centripetal thrust force protection bearing used for magnetic suspension bearing system - Google Patents
Centripetal thrust force protection bearing used for magnetic suspension bearing system Download PDFInfo
- Publication number
- CN100587283C CN100587283C CN200710192282A CN200710192282A CN100587283C CN 100587283 C CN100587283 C CN 100587283C CN 200710192282 A CN200710192282 A CN 200710192282A CN 200710192282 A CN200710192282 A CN 200710192282A CN 100587283 C CN100587283 C CN 100587283C
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- Prior art keywords
- group
- rolling bearing
- bearing
- elastic damper
- radial
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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
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0442—Active magnetic bearings with devices affected by abnormal, undesired or non-standard conditions such as shock-load, power outage, start-up or touchdown
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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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
- F16C19/55—Systems consisting of a plurality of bearings with rolling friction with intermediate floating or independently-driven rings rotating at reduced speed or with other differential ball or roller bearings
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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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/54—Systems consisting of a plurality of bearings with rolling friction
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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
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
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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
- F16C39/00—Relieving load on bearings
- F16C39/02—Relieving load on bearings using mechanical means
Abstract
The invention relates to a centripetal thrust protection bearing used for a magnetic suspension bearing system, which belongs to a magnetic suspension bearing. The invention comprises inner rings andouter rings of a first set of roller bearings, adapter rings, inner rings and outer rings of a second set of roller bearings, an inner ring and an outer ring of a radial elastic damper, a radial three-layer to twenty-layer corrugated steel plate, a first set of bolts, an end cover, a machine foundation, a rotor component, an axial elastic damper, a gland and a second set of bolts. The rotating speed born by a roller bearing in the prior structure is born by two sets or over two sets of bearings, and energy generated by vibration and impact is absorbed by utilization of elastic deformation in the radial direction and the axial direction of the dampers and friction power applying work in the tangent direction of the dampers, thereby working speed and service life of the bearings are improved. The invention can be taken as the centripetal thrust protection bearing for simultaneously bearing radial load and axial load in the magnetic suspension bearing system and also can be taken as a roller bearing having the advantages of higher rotating speed and vibration and compact resistance.
Description
One, technical field
The invention provides a kind of by many groups rolling bearing (2 groups and more than; every group with 2 angular contact ball bearings) and the centripetal thrust force protection bearing formed of elastic damper; both can improve the working speed of protection bearing; can absorb most of energy that produces with impacting by vibration again; be suitable as the centripetal thrust force protection bearing that bears radial load and thrust load in the high-speed magnetic levitation bearing arrangement simultaneously, can be used as also that rotating speed is higher, the rolling bearing of vibration resistance and impact uses.
Two, background technique
In magnetic levitation bearing system; reliability and security in order to ensure system; generally need a cover protection bearing (to be also referred to as auxiliary bearing; or replacement bearing; or emergent bearing); one of them is exactly the centripetal thrust force protection bearing that bears radial load and thrust load simultaneously, its main purpose be when magnetic suspension bearing lost efficacy at the rotor of radial and axial temporary support high speed rotating, protection magnetic suspension equipment is not damaged.Because the rotating speed of magnetic suspension bearing is generally all very high; rotor assembly drop into the protection bearing on the time can produce very big vibration and impact; at present the subject matter that exists is that the working speed of existing protection bearing is on the low side, the opposing vibration is relatively poor with the ability of impacting, and the protection bearing usually takes place burn out and the serious accident of damage equipment.
Three, summary of the invention
The objective of the invention is, at the problem that background technique exists, provide that a kind of rotating speed is higher, the centripetal thrust force protection bearing of vibration resistance and impact, improved reliability and the Security of protecting bearing, to satisfy the needs of high-speed magnetic levitation bearing arrangement.
The present invention adopts many group rolling bearings (2 groups and more than, every group with 2 angular contact ball bearings) and centripetal thrust force protection bearing of elastic damper composition.In radial direction, the outer ring of first group of rolling bearing and the inner ring of second group of rolling bearing are linked together, the outer ring of second group of rolling bearing is assemblied in the endoporus of radial elastic damper, the outer ring with radial elastic damper is assemblied in the support hole at last.At axial direction, the cycle surface of first group of rolling bearing is contacted with the end face of adapter ring and gland respectively by axial elastic damper.The protection bearing that combines like this can adapt to higher working speed, and can absorb most of energy that is produced with impacting by vibration.
The present invention is used for the centripetal thrust force protection bearing of magnetic levitation bearing system; can bear radial load and thrust load simultaneously; the concrete composition; the inner ring and the outer ring that comprise first group of rolling bearing; adapter ring; the inner ring of second group of rolling bearing and outer ring; the interior ring and the outer shroud of radial elastic damper; multilayer (3～20 layers) Corrugated Steel radially; first group of screw; end cap; support; rotor assembly; axial elastic damper; gland; second group of screw; wherein rotor assembly is packed in the inner ring of first group of rolling bearing; there are radial clearance and axial clearance with the inner ring of first group of rolling bearing; first group of rolling bearing and second group of rolling bearing are respectively with 2 angular contact ball bearings; 2 angular contact ball bearings of first group adopt face-to-face to be installed; 2 angular contact ball bearings of second group adopt back-to-back installation; the outer ring of first group of rolling bearing is linked together by the inner ring of adapter ring and second group of rolling bearing; the interior evil idea of the outer ring of second group of rolling bearing and radial elastic damper is linked together; the interior ring of radial elastic damper is by the formation radial elastic damper that is assembled together of the outer shroud of multilayer (3～20 layers) Corrugated Steel and radial elastic damper radially; the outer shroud of radial elastic damper and the endoporus of support are assembled together; end cap links to each other with support by first group of screw; and second group of rolling bearing carried out axial compression with fixing; the cycle surface of first group of rolling bearing contacts with the end face of adapter ring and gland respectively by axial elastic damper; gland links to each other with adapter ring by second group of screw, and first group of rolling bearing carried out axial compression with fixing.
Adopt above-mentioned similar method to continue inner ring with the outer ring of second group of rolling bearing and the 3rd group of rolling bearing and be linked together the centripetal thrust force protection bearing that formation is made up of 3 groups and above rolling bearing.
Its principle is as follows:
In the structural design of conventional rolling bearing, general and support hole, the outer ring of rolling bearing is assembled together, and does not rotate.The present invention is linked together the outer ring of first group of rolling bearing and the inner ring of second group of rolling bearing, therefore also and then rotation of the outer ring of first group of rolling bearing.The outer ring of first group of rolling bearing and the relative rotation speed of inner ring have so just been reduced.Adopt this structure, rotating speed is born by the bearing that certain proportion has been assigned to two groups or more, reduced the relative rotation speed of every group of bearing inner race and outer ring.Centripetal thrust force protection bearing for magnetic levitation bearing system; because the inner ring of first group of rolling bearing and rotor assembly have gap about 0.2mm in radial and axial direction; all can be created in very big vibration and impact radial and axial when rotor assembly drops on the centripetal thrust force protection bearing, cause protecting the damage of bearing easily.In order to address this problem, the present invention has respectively designed an elastic damper radial and axial.In radial direction, the outer ring of second group of rolling bearing directly is not assembled together with the support hole, but first outer ring with second group of rolling bearing is assemblied on the radial elastic damper, then elastic damper is assemblied in the support hole.At axial direction, the cycle surface of first group of rolling bearing is contacted by the end face of axial elastic damper with adapter ring and gland.Utilize elastic damper distortion and friction working to absorb vibration and the energy that impacts, the working speed and the life-span of having improved the centripetal thrust force protection bearing.Not only can be used as the centripetal thrust force protection bearing of high-speed magnetic levitation bearing arrangement, also can be used as the higher rolling bearing of rotating speed and use.
Four, description of drawings
Fig. 1 is a centripetal thrust force protection bearing schematic representation of the present invention.
Fig. 2 is a radial elastic damper schematic representation of the present invention.
Fig. 3 is an axial elastic damper schematic representation of the present invention
Among the figure: the inner ring of 1 first group of rolling bearing, the outer ring of 2 first groups of rolling bearings, 3 adapter rings, the inner ring of 4 second groups of rolling bearings, the outer ring of 5 second groups of rolling bearings, the interior ring of 6 radial elastic dampers, 7 multilayer (3～20 layers) Corrugated Steels radially, the outer shroud of 8 radial elastic dampers, 9 first groups of screws, 10 end caps, 11 supports, 12 rotor assembly, 13 axial elastic dampers, 14 glands, 15 second groups of screws, A is an axial direction, R is a radial direction, α is a tangent direction, and θ is tangential expansion direction.
Five, embodiment
Below in conjunction with accompanying drawing composition of the present invention, working principle and structural design are described in further detail.
The centripetal thrust force protection bearing that is used for magnetic levitation bearing system shown in Figure 1 can be used as the protection bearing that bears radial load and thrust load in the magnetic levitation bearing system.The outer ring 2 of first group of rolling bearing is linked together by the inner ring 4 of adapter ring 3 and second group of rolling bearing; the outer ring 5 of second group of rolling bearing is linked together with the interior ring 6 of radial elastic damper; the interior ring 6 of radial elastic damper, the outer shroud 8 of multilayer (3～20 layers) Corrugated Steel 7 and the radial elastic damper formation radial elastic damper that is assembled together radially; the outer shroud 8 of radial elastic damper is assembled together with the endoporus of support 11, utilizes end cap 10 and 9 pairs of protection bearings of first group of screw to carry out axial compression with fixing.Also can adopt similar method to continue inner ring with the outer ring 5 of second group of rolling bearing and the 3rd group of rolling bearing and be linked together the centripetal thrust force protection bearing that formation is made up of many groups of (3 groups reach more than) rolling bearings.The principle that this protection bearing can improve working speed is: because the outer ring 2 of first group of rolling bearing and the inner ring 4 of second group of rolling bearing are linked together by adapter ring 3; therefore also and then rotation of the outer ring 2 of first group of rolling bearing; the outer ring 2 of first group of rolling bearing and the relative rotation speed of inner ring 1 have so just been reduced; make rotating speed by certain pro rate to two groups or more bearing bear, therefore can improve the working speed of protection bearing.As the centripetal thrust force protection bearing that bears radial load and thrust load in the magnetic levitation bearing system; the inner ring 1 and the rotor assembly 12 of first group of rolling bearing exist radial clearance and axial clearance; when magnetic suspension bearing lost efficacy; rotor assembly 12 all can produce bigger vibration and impact radial and axial; this protection bearing can absorb vibration and the most of energy that impacts in radial direction; its principle is: because the outer ring 5 of second group of rolling bearing is not directly installed in the endoporus of support 11; but be installed in earlier on the interior ring 6 of radial elastic damper; outer shroud 8 by radial elastic damper is installed in the endoporus of support 11 then; when bigger radial vibration and impact; radially multilayer (3～20 layers) Corrugated Steel 7 has produced radial deformation, so thereby owing to the curvature of every layer of radial corrugation steel plate different tangent direction produced friction absorbed by vibration with impact the most of energy that produces.This protection bearing also can absorb vibration and the most of energy that impacts at axial direction, its principle is: the end face of first group of housing washer 2 contacts with the end face of adapter ring 3 with gland 14 respectively by axial elastic damper 13, the vibration of axial direction and impact make axial elastic damper 13 produce axial deformation, and part vibration and the form of the energy that impacts with elastic potential energy are stored; In axial deformation, slide relative tangentially takes place in every layer of axial Corrugated Steel 13, consequent friction working, the energy of dissipated again a part of vibration and impact.Therefore, axial elastic damper 13 has absorbed most of energy of axial vibration and impact by the mode of axial elasticity distortion with the tangent direction friction working.When magnetic suspension bearing lost efficacy, this centripetal thrust force protection bearing can not be damaged at radial and axial protection magnetic suspension equipment.
Radial elastic damper shown in Figure 2, outer shroud 8 by interior ring 6, multilayer (3～20 layers) Corrugated Steel 7 and the radial elastic damper of radial elastic damper is formed, and the interior ring 6 of radial elastic damper and the effect of outer shroud 8 are the coaxalitys that guarantee the inside and outside circle of radial elastic damper.When rotor assembly 12 drops into the inner ring 1 of centripetal protection bearing, can produce bigger vibration and impact in radial direction, this moment, radially multilayer (3～20 layers) Corrugated Steel 7 produced radial deformation, and part vibration and the form of the energy that impacts with elastic potential energy are stored; Because the curvature difference of every layer of Corrugated Steel 7 makes every layer of Corrugated Steel 7 that slide relative tangentially take place, consequent friction working, the energy of dissipated again a part of vibration and impact.Therefore, radial elastic damper (forming by 6,7,8) has absorbed the most of energy that is produced in radial direction by vibration and impact, the life-span that can improve centripetal protection bearing by the mode of radial elastic distortion with the tangent direction friction working.
Axial elastic damper 13 shown in Figure 3 is made up of multilayer (3～20 layers) Corrugated Steel, when rotor assembly 12 drops into the inner ring 1 of centripetal thrust force protection bearing, radially can produce bigger vibration and impact with axial direction.The vibration of radial direction is absorbed by radial elastic damper (forming by 6,7,8) with impact, dependence axial elastic damper 13 absorbs with impacting mainly in the vibration of axial direction, its principle is: the vibration of axial direction and impact make axial elastic damper 13 produce axial deformation, and part vibration and the form of the energy that impacts with elastic potential energy are stored; In axial deformation, slide relative tangentially takes place in every layer of axial Corrugated Steel 13, consequent friction working, the energy of dissipated again a part of vibration and impact.Therefore, axial elastic damper 13 has absorbed axial vibration and impact by the mode of axial elasticity distortion with the tangent direction friction working.
If the damage of rolling bearing is mainly produced by vibration and impact, can omit second group of rolling bearing this moment, directly the outer ring 2 of first group of rolling bearing and the interior ring 6 of radial elastic damper are assembled together, again the outer shroud 8 of radial elastic damper and the endoporus of support 11 are assembled together, radial elastic damper (forming by 6,7,8) absorbs the vibration and the impact of radial direction, and axial elastic damper 13 absorbs the vibration and the impact of axial direction.
Claims (1)
1; a kind of centripetal thrust force protection bearing that is used for magnetic suspension system; it is characterized in that; the inner ring (1) that comprises first group of rolling bearing; the outer ring of first group of rolling bearing (2); adapter ring (3); the inner ring of second group of rolling bearing (4); the outer ring of second group of rolling bearing (5); the interior ring (6) of radial elastic damper; 3～20 layers Corrugated Steel (7) radially; the outer shroud of radial elastic damper (8); first group of screw (9); end cap (10); support (11); rotor assembly (12); axial elastic damper (13); gland (14); second group of screw (15); wherein rotor assembly (12) inner ring (1) of packing in the inner ring (1) of first group of rolling bearing with first group of rolling bearing exists radial clearance and axial clearance; every group respectively with 2 angular contact ball bearings; 2 angular contact ball bearings of first group adopt face-to-face to be installed; 2 angular contact ball bearings of second group adopt back-to-back installation; the outer ring of first group of rolling bearing (2) is linked together by the inner ring (4) of adapter ring (3) with second group of rolling bearing; the outer ring of second group of rolling bearing (5) is linked together with the interior ring (6) of radial elastic damper; the interior ring (6) of radial elastic damper is by the formation radial elastic damper that is assembled together of the outer shroud (8) of 3～20 layers Corrugated Steel (7) and radial elastic damper radially; the outer shroud of radial elastic damper (8) is assembled together with the endoporus of support (11); end cap (10) links to each other with support (11) by first group of screw (9); and second group of rolling bearing carried out axial compression with fixing; the end face of the outer ring of first group of rolling bearing (2) contacts with the end face of adapter ring (3) with gland (14) respectively by axial elastic damper (13); gland (14) links to each other with adapter ring (3) by second group of screw (15), and first group of rolling bearing carried out axial compression with fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710192282A CN100587283C (en) | 2007-12-24 | 2007-12-24 | Centripetal thrust force protection bearing used for magnetic suspension bearing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710192282A CN100587283C (en) | 2007-12-24 | 2007-12-24 | Centripetal thrust force protection bearing used for magnetic suspension bearing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101191521A CN101191521A (en) | 2008-06-04 |
| CN100587283C true CN100587283C (en) | 2010-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200710192282A Expired - Fee Related CN100587283C (en) | 2007-12-24 | 2007-12-24 | Centripetal thrust force protection bearing used for magnetic suspension bearing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097877A (en) * | 2011-01-14 | 2011-06-15 | 国电联合动力技术有限公司 | Method for fixing open end of cup-shaped rotor of double-stator motor |
| US11015647B2 (en) | 2017-09-08 | 2021-05-25 | Atlas Copco Airpower, Naamloze Vennootschap | Device provided with a bearing-in-bearing |
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| CN101867261B (en) * | 2010-03-30 | 2012-07-04 | 洛阳轴研科技股份有限公司 | Method for selecting outer rotor matched with gyro motor bearings and selection device |
| CN102168719B (en) * | 2011-04-21 | 2012-12-12 | 南京磁谷科技有限公司 | Axial protective bearing |
| CN102797757A (en) * | 2012-08-21 | 2012-11-28 | 清华大学 | Assistant bearing system for electromagnetic bearing |
| CN103836080B (en) * | 2012-11-23 | 2016-06-01 | 北京奇峰聚能科技有限公司 | Combined-type magnetic suspends and protects bearing arrangement |
| CN103233984B (en) * | 2013-04-07 | 2015-12-02 | 哈尔滨工程大学 | A kind of aiding support of vertical magnetic suspension flywheel rotor |
| CN110259824B (en) * | 2019-06-05 | 2020-06-19 | 清华大学 | Protective bearing assembly of magnetic bearing |
| CN111005939A (en) * | 2020-01-07 | 2020-04-14 | 珠海格力电器股份有限公司 | Radial protection system of magnetic suspension bearing |
| CN111981041B (en) * | 2020-08-24 | 2021-11-23 | 淮阴工学院 | Magnetic suspension bearing radial protection structure and protection method thereof |
| CN112593868B (en) * | 2020-12-10 | 2022-03-08 | 北京科技大学 | Petroleum drill string shock absorber |
| CN113977452A (en) * | 2021-11-02 | 2022-01-28 | 广州大学 | Universal self-centering flexible clamp for bearing inner ring reinforced grinding and grinding device |
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|---|---|---|---|---|
| SU616454A1 (en) * | 1977-01-16 | 1978-07-25 | Предприятие П/Я В-2190 | Magnetic suspension member |
| US5642797A (en) * | 1996-02-08 | 1997-07-01 | Dana Corporation | Molded plastic rotor assembly for electromagnetic friction clutch |
| CN1544822A (en) * | 2003-11-14 | 2004-11-10 | 清华大学 | Outboard bearing apparatus for active magnetic suspension bearing |
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| Title |
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| 电磁轴承系统中的辅助轴承与振动影响. 万金贵，汪希平，夏翠艳，雷永锋.哈尔滨轴承，第27卷第3期. 2006 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097877A (en) * | 2011-01-14 | 2011-06-15 | 国电联合动力技术有限公司 | Method for fixing open end of cup-shaped rotor of double-stator motor |
| US11015647B2 (en) | 2017-09-08 | 2021-05-25 | Atlas Copco Airpower, Naamloze Vennootschap | Device provided with a bearing-in-bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101191521A (en) | 2008-06-04 |
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Application publication date: 20080604 Assignee: Nanjing CIGU Limited Corporation Assignor: Nanjing University of Aeronautics and Astronautics Contract record no.: 2017320000090 Denomination of invention: Centripetal thrust force protection bearing used for magnetic suspension bearing system Granted publication date: 20100203 License type: Common License Record date: 20170317 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20100203 Termination date: 20191224 |