CN102425639A - elastic support structure - Google Patents
elastic support structure Download PDFInfo
- Publication number
- CN102425639A CN102425639A CN2011103907816A CN201110390781A CN102425639A CN 102425639 A CN102425639 A CN 102425639A CN 2011103907816 A CN2011103907816 A CN 2011103907816A CN 201110390781 A CN201110390781 A CN 201110390781A CN 102425639 A CN102425639 A CN 102425639A
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- Prior art keywords
- support structure
- elastic support
- film damper
- bearing
- structure according
- 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.)
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- 239000003921 oil Substances 0.000 claims abstract description 29
- 239000010687 lubricating oil Substances 0.000 claims abstract description 20
- 238000009434 installation Methods 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000013016 damping Methods 0.000 description 13
- 229920001971 elastomer Polymers 0.000 description 9
- 239000000806 elastomer Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- 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
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
-
- 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
Landscapes
- Support Of The Bearing (AREA)
Abstract
The present invention provides an elastic support structure comprising: the supporting structure comprises a cylindrical supporting body (1), wherein the supporting body (1) is installed on a casing (7), and the supporting body (1) comprises a bearing loading seat (2) and a plurality of elastic cage bars (3); a gap is formed between the circumferential outer wall of the bearing loading seat (2) and the casing (7), and lubricating oil is filled in the gap to form an extrusion oil film damper; the circumferential outer wall of the bearing loading seat (2) is provided with an oil film journal (4) of the squeeze oil film damper. The supporting structure combining the elastic cage bars and the squeeze film damper is adopted, the squeeze film damper plays a role in vibration reduction, deformation of the elastic support can be reduced and limited, and reliability of the structure is greatly guaranteed; the elastic cage bars have the function of adjusting the critical rotating speed of the rotor system.
Description
Technical field
The present invention relates to the yielding support field, especially, relate to a kind of elastic support structure.
Background technique
The working speed of modern aeroengine is general all more than 10000r/min; The working speed of some mini engines is then up to 40000～50000r/min; Its high-speed rotor system mostly adopts " gentle axle " design, makes the engine operation rotating speed be higher than the critical speed of rotation of rotor-support-foundation system.Often very difficult through changing rotor structure (diameter of axle, pivot distance etc.) adjustment critical speed of rotation.
At present, elastic support structure mainly contains cage bar formula elastic support structure and elasticity ring type elastic support structure, and cage bar formula elastic support structure divides rotor cage type elastic support structure and pull-rod type elastic support structure again.In practical application, need type, the rigidity of elastic support structure to be confirmed this is the process of an experience, calculating, test Comprehensive Assessment.
Cage bar formula (squirrel-cage and pull-rod type) elastic support structure is compared with elasticity ring type elastic support structure, and structure is complicated, and institute takes up space bigger, and weight lays particular stress on.Rotor cage type elastic support structure wherein, when elasticity cage bar quantity was selected not at that time, two ends are prone to produce that stress is concentrated or circumferentially rigidity is uneven, and the pull-rod type two ends are difficult for producing stress concentrates, but structure, processing, assembling are more complicated than squirrel-cage.Outer lug boss in the supporting of elasticity ring type needs on a thin ring, to process, easy deformation, difficulty of processing is higher.
Summary of the invention
The object of the invention is to provide a kind of elastic support structure, to solve the technical problem of existing elastic support structure, assembling complicacy and easy deformation.
For realizing above-mentioned purpose, the invention provides a kind of elastic support structure, comprising: columnar support body, support body are installed on the casing, and support body comprises bearing stowage receptacle and Duo Gen elasticity cage bar; Form the space between the outer circumferential walls of bearing stowage receptacle and the casing, and be full of lubricating oil in the space to form squeeze film damper; The outer circumferential walls of bearing stowage receptacle is the oil film axle journal of squeeze film damper.
Further, the end of elasticity cage bar is extended with the installation limit along the radially outward of support body, installs on the limit and offers a plurality of mounting holes.
Further, it is the ring raised line that the limit is installed, and it is a plurality of flanges that are interrupted setting that the limit perhaps is installed.
Further, many elasticity cage bars axially evenly arranging along support body; The joint of many elasticity cage bars and bearing stowage receptacle is set to fillet or arc angle.
Further, the limit is installed is provided with at least one lubricating oil nozzle mounting groove, the gap perforation between lubricating oil nozzle mounting groove and adjacent two the elasticity cage bars.
Further, the bearing stowage receptacle axially is extended with at least one anti-rotation boss away from elasticity cage bar end face along support body.
Further, the thickness of the outer circumferential walls of bearing stowage receptacle and the lubricating oil in the space between the casing is the oil film radius of squeeze film damper; Relation between the diameter of the oil film radius of squeeze film damper and the oil film axle journal of squeeze film damper is: 2C/D=(1.25～2.50) ‰, and wherein, C is the oil film radius, D is the diameter of oil film axle journal.
Further, offer an oil supply that connects with squeeze film damper on the casing, the two ends of squeeze film damper do not have end-blocking.
Further, the rigidity of elastic support structure is 1.50～2.50 * 10
7N/m.
The present invention has following beneficial effect: the supporting structure that the present invention adopts elasticity cage bar and squeeze film damper to combine; Squeeze film damper wherein plays damping effect; Simultaneously can reduce and limit flexibly mounted distortion, greatly guarantee this reliability of structure; Elasticity cage bar wherein plays the effect of the critical speed of rotation of adjustment rotor-support-foundation system.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.To do further detailed explanation to the present invention with reference to figure below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the damping elastomer supporting structure of the preferred embodiment of the present invention; And
Fig. 2 is that the damping elastomer supporting structure of the preferred embodiment of the present invention is installed in the structural representation on the casing.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
The elastic support structure of the preferred embodiment of the present invention is mainly used in the vibration damping in rotor high-speed when operation of aeroengine, and this elastic support structure is installed on the casing of aeroengine, and rotor bearing then is installed in the bearing stowage receptacle of this elastic support structure.
Referring to Fig. 1 and Fig. 2, elastic support structure of the present invention is columnar cylindrical shell, is installed on the casing 7 of aeroengine.This elastic support structure comprises support body 1, and support body 1 comprises bearing stowage receptacle 2 and Duo Gen elasticity cage bar 3.After elastic support structure is installed on the casing 7, form the space of a determining deviation between the outer circumferential walls of the bearing stowage receptacle 2 of support body 1 and the casing 7, after being full of lubricating oil in this space, this space and lubricating oil constitute squeeze film damper together.At this moment, the outer circumferential walls of the bearing stowage receptacle 2 of support body 1 is the oil film axle journal 4 of squeeze film damper.Preferably; The first end end face of support body 1 axially is extended with anti-rotation boss 6 along support body 1; Be bearing stowage receptacle 2 away from elasticity cage bar 3 end faces along support body 1 axially be extended with anti-rotation boss 6, the quantity of this anti-rotation boss 6 can be provided with one, two or a plurality of according to rotor speed and the stressed needs of elastic support structure vibrations.The oil film radius of this squeeze film damper satisfies relation: 2C/D=(1.25～2.50) ‰; Wherein, C is the oil film radius, also promptly is full of outer circumferential walls and the thickness of the lubricating oil in the space between the casing 7 of the bearing stowage receptacle 2 of support body 1, and D is the diameter of oil film axle journal 4.Preferably, the oil film radius of this squeeze film damper satisfies relation: 2C/D=(1.50～2.10) ‰.More preferably, the oil film radius of this squeeze film damper satisfies relation: 2C/D=(1.550,1.600,1.650,1.800,1.900) ‰.On casing 7, offer an oil supply 8 that connects with squeeze film damper, the two ends of squeeze film damper do not have shutoff, and lubricating oil flows out from the two ends of this squeeze film damper again in the space that this oil supply 8 gets between oil film axle journal 4 and the casing 7.Like this, give full play to the damping effect of this squeeze film damper.Preferably, oil supply 8 is opened in casing 7 and the corresponding position of squeeze film damper medium position.
First end of many elasticity cage bars 3 of elastic support structure is connected with bearing stowage receptacle 2, promptly is fixed on the second end end face of bearing stowage receptacle 2; Second end of these many elasticity cage bars 3 is connected with an installing ring, and the quantity of these many elasticity cage bars 3 and length can be selected to confirm as required.Preferably, many elasticity cage bars 3 axially evenly arranging in support body 1 upper edge support body 1.More preferably, many elasticity cage bars 3 are set to fillet or arc angle with the joint of bearing stowage receptacle 2 and installing ring.The end of the elasticity cage bar 3 of support body 1 is extended with installation limit 5 along the radially outward of support body 1; Preferably; Radially outward along support body 1 stretches out from the end of installing ring on this installation limit 5; This installs limit 5 is the ring raised line, installs on the limit 5 and offers a plurality of mounting holes 51, is used for support body 1 is fixed on casing 7.Preferably, a plurality of mounting holes 51 are evenly arranged in that limit 5 equal intervals are installed.As additional embodiments, limit 5 is installed for being interrupted a plurality of flanges of setting.Limit 5 is installed is provided with lubricating oil nozzle mounting groove 52, the gap between lubricating oil nozzle mounting groove 52 and the adjacent two elasticity cage bars 3 wherein connects.Like this, lubricating oil nozzle can eject lubricating oil after being installed in this lubricating oil nozzle mounting groove 52, provides lubricated for rotor and rotor bearing in the casing 7.Preferably, the quantity of this lubricating oil nozzle mounting groove 52 can be provided with one, two or a plurality of as required.
The damping elastomer supporting structure need bear complicated outside force when rotor high-speed moves, thereby strict to the rigidity requirement of damping elastomer supporting structure.The rigidity of damping elastomer supporting structure of the present invention is 1.50～2.50 * 10
7N/m.Preferably, the rigidity of this damping elastomer supporting structure is 1.90～1.965 * 10
7N/m.More preferably, the rigidity of this damping elastomer supporting structure is (1.915,1.920,1.935,1.950) * 10
7N/m.
When engine operation, lubricating oil is in the space that this oil supply 8 gets between oil film axle journal 4 and the casing 7, thus the formation squeeze film damper.Elastic body 1 is used to adjust the critical speed of rotation of rotor-support-foundation system; This squeeze film damper is used for vibration damping.
This damping elastomer supporting structure comprises elasticity cage bar and squeeze film damper; When the working speed of motor and critical speed of rotation are overlapping or close; To cause engine luggine big; This yielding support is the critical speed of rotation that is used to adjust rotor-support-foundation system, and it is interval to make critical speed of rotation avoid the engine operation rotating speed after the adjustment; Simultaneously, squeeze film damper can reduce and limit the distortion of elasticity cage bar, thereby guarantees this damping elastomer supporting structure reliable operation.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. elastic support structure comprises: columnar support body (1), and said support body (1) is installed on the casing (7), it is characterized in that,
Said support body (1) comprises bearing stowage receptacle (2) and many elasticity cage bars (3);
Form the space between the outer circumferential walls of said bearing stowage receptacle (2) and the said casing (7), and be full of lubricating oil in the said space to form squeeze film damper;
The outer circumferential walls of said bearing stowage receptacle (2) is the oil film axle journal (4) of said squeeze film damper.
2. elastic support structure according to claim 1 is characterized in that,
The end of said elasticity cage bar (3) is extended with installation limit (5) along the radially outward of said support body (1), offers a plurality of mounting holes (51) on the said installation limit (5).
3. elastic support structure according to claim 2 is characterized in that,
Said installation limit (5) is the ring raised line, and perhaps said installation limit (5) is for being interrupted a plurality of flanges of setting.
4. elastic support structure according to claim 3 is characterized in that,
Said many elasticity cage bars (3) are axially evenly arranged along said support body (1);
Said many elasticity cage bars (3) are set to arc angle with the joint of said bearing stowage receptacle (2).
5. elastic support structure according to claim 4 is characterized in that,
Said installation limit (5) is provided with at least one lubricating oil nozzle mounting groove (52), and the gap between said lubricating oil nozzle mounting groove (52) and adjacent two the said elasticity cage bars (3) connects.
6. elastic support structure according to claim 5 is characterized in that,
Said bearing stowage receptacle (2) axially be extended with at least one anti-rotation boss (6) away from the end face of said elasticity cage bar (3) along said support body (1).
7. elastic support structure according to claim 6 is characterized in that,
The thickness of the lubricating oil in the space between the outer circumferential walls of said bearing stowage receptacle (2) and the said casing (7) is the oil film radius of said squeeze film damper;
Relation between the diameter of the oil film radius of said squeeze film damper and the oil film axle journal of said squeeze film damper is: 2C/D=(1.25～2.50) ‰, and wherein, C is the oil film radius, D is the diameter of oil film axle journal.
8. elastic support structure according to claim 7 is characterized in that,
Offer an oil supply (8) that connects with said squeeze film damper on the said casing (7), the two ends of said squeeze film damper do not have end-blocking.
9. elastic support structure according to claim 8 is characterized in that,
The rigidity of said elastic support structure is 1.50～2.50 * 10
7N/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103907816A CN102425639A (en) | 2011-11-30 | 2011-11-30 | elastic support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103907816A CN102425639A (en) | 2011-11-30 | 2011-11-30 | elastic support structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102425639A true CN102425639A (en) | 2012-04-25 |
Family
ID=45959653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103907816A Pending CN102425639A (en) | 2011-11-30 | 2011-11-30 | elastic support structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN102425639A (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061994A (en) * | 2014-06-23 | 2014-09-24 | 中国航空动力机械研究所 | Elastic supporting device vibration strain monitoring method |
| CN104358820A (en) * | 2014-11-28 | 2015-02-18 | 哈尔滨广瀚燃气轮机有限公司 | Back-turning type elastic supporter with oil film damper |
| CN105526206A (en) * | 2016-01-28 | 2016-04-27 | 衢州学院 | Cone valve with squeeze oil film buffering |
| CN105675276A (en) * | 2016-01-13 | 2016-06-15 | 中国航空动力机械研究所 | Device and method for testing vibration damping property of elastic support extruded oil film damper |
| CN105738057A (en) * | 2016-02-24 | 2016-07-06 | 中国航空动力机械研究所 | Mouse cage elastic supporting device vibration strain and amplitude calibration system and method |
| CN106907355A (en) * | 2017-04-28 | 2017-06-30 | 中国航发湖南动力机械研究所 | A kind of elastic bearing squeeze film damper |
| CN108007692A (en) * | 2017-12-28 | 2018-05-08 | 湖南科技大学 | It is a kind of for turboshaft engine birotor experimental bench can dissection type supporting structure |
| CN108204422A (en) * | 2018-03-09 | 2018-06-26 | 沈阳航空航天大学 | A kind of parallel squeeze film damper |
| CN109058380A (en) * | 2018-07-31 | 2018-12-21 | 中国航发湖南动力机械研究所 | Mouse cage bullet branch metal-rubber damper |
| CN109108697A (en) * | 2018-10-31 | 2019-01-01 | 北京航空航天大学 | A kind of thin-walled elastic bearing and its tooling, processing method |
| CN109668717A (en) * | 2018-12-17 | 2019-04-23 | 南京航空航天大学 | A kind of double-layer oil film double base squeeze film damper |
| CN110360271A (en) * | 2019-08-23 | 2019-10-22 | 中国船舶重工集团公司第七0三研究所 | A kind of cantilever type double-layer squeeze film damping shock absorber |
| US10883539B1 (en) | 2019-11-19 | 2021-01-05 | Honeywell International Inc. | Anti-rotation squeeze film damper bearing assembly |
| CN113503305A (en) * | 2021-08-03 | 2021-10-15 | 中国航发湖南动力机械研究所 | Long and thin flexible shaft structure of sectional type engine |
| CN113565792A (en) * | 2021-07-21 | 2021-10-29 | 中国航空发动机研究院 | Elastic supporting structure |
| CN114856728A (en) * | 2022-04-21 | 2022-08-05 | 中国科学院工程热物理研究所 | Load bearing structure is fallen in formula fusing of turning back of engine low pressure rotor fan end |
| CN115539562A (en) * | 2022-09-23 | 2022-12-30 | 郑州大学 | Squeeze film damper capable of actively and coarsely and finely adjusting oil film gap |
| CN115539147A (en) * | 2022-08-24 | 2022-12-30 | 中国航发湖南动力机械研究所 | Integrated elastic support capable of testing axial load of rotor and measuring method |
| CN115638209A (en) * | 2022-10-17 | 2023-01-24 | 中国航发沈阳发动机研究所 | Elastic support with eccentric structure |
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Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061994A (en) * | 2014-06-23 | 2014-09-24 | 中国航空动力机械研究所 | Elastic supporting device vibration strain monitoring method |
| CN104358820A (en) * | 2014-11-28 | 2015-02-18 | 哈尔滨广瀚燃气轮机有限公司 | Back-turning type elastic supporter with oil film damper |
| CN105675276A (en) * | 2016-01-13 | 2016-06-15 | 中国航空动力机械研究所 | Device and method for testing vibration damping property of elastic support extruded oil film damper |
| CN105675276B (en) * | 2016-01-13 | 2018-07-10 | 中国航空动力机械研究所 | A kind of elastic bearing squeeze film damper damping behavior experimental rig |
| CN105526206B (en) * | 2016-01-28 | 2018-07-03 | 衢州学院 | A kind of cone valve with squeeze film buffering |
| CN105526206A (en) * | 2016-01-28 | 2016-04-27 | 衢州学院 | Cone valve with squeeze oil film buffering |
| CN105738057A (en) * | 2016-02-24 | 2016-07-06 | 中国航空动力机械研究所 | Mouse cage elastic supporting device vibration strain and amplitude calibration system and method |
| CN105738057B (en) * | 2016-02-24 | 2019-01-22 | 中国航空动力机械研究所 | Mouse cage elastic bearing device vibration strains and amplitude calibration system and method |
| CN106907355A (en) * | 2017-04-28 | 2017-06-30 | 中国航发湖南动力机械研究所 | A kind of elastic bearing squeeze film damper |
| CN106907355B (en) * | 2017-04-28 | 2019-03-05 | 中国航发湖南动力机械研究所 | A kind of elastic bearing squeeze film damper |
| CN108007692A (en) * | 2017-12-28 | 2018-05-08 | 湖南科技大学 | It is a kind of for turboshaft engine birotor experimental bench can dissection type supporting structure |
| CN108007692B (en) * | 2017-12-28 | 2023-11-10 | 湖南科技大学 | A separable support structure for a turboshaft engine dual-rotor test bench |
| CN108204422A (en) * | 2018-03-09 | 2018-06-26 | 沈阳航空航天大学 | A kind of parallel squeeze film damper |
| CN108204422B (en) * | 2018-03-09 | 2024-04-30 | 沈阳航空航天大学 | Parallel extrusion oil film damper |
| CN109058380A (en) * | 2018-07-31 | 2018-12-21 | 中国航发湖南动力机械研究所 | Mouse cage bullet branch metal-rubber damper |
| CN109058380B (en) * | 2018-07-31 | 2020-06-23 | 中国航发湖南动力机械研究所 | Mouse cage elastic support metal rubber damper |
| CN109108697A (en) * | 2018-10-31 | 2019-01-01 | 北京航空航天大学 | A kind of thin-walled elastic bearing and its tooling, processing method |
| CN109668717A (en) * | 2018-12-17 | 2019-04-23 | 南京航空航天大学 | A kind of double-layer oil film double base squeeze film damper |
| CN109668717B (en) * | 2018-12-17 | 2020-07-28 | 南京航空航天大学 | A double-layer oil-film double-support squeeze oil-film damper |
| CN110360271B (en) * | 2019-08-23 | 2021-09-14 | 中国船舶重工集团公司第七0三研究所 | Cantilever type double-layer squeeze film damping shock absorber |
| CN110360271A (en) * | 2019-08-23 | 2019-10-22 | 中国船舶重工集团公司第七0三研究所 | A kind of cantilever type double-layer squeeze film damping shock absorber |
| US10883539B1 (en) | 2019-11-19 | 2021-01-05 | Honeywell International Inc. | Anti-rotation squeeze film damper bearing assembly |
| CN113565792A (en) * | 2021-07-21 | 2021-10-29 | 中国航空发动机研究院 | Elastic supporting structure |
| CN113503305A (en) * | 2021-08-03 | 2021-10-15 | 中国航发湖南动力机械研究所 | Long and thin flexible shaft structure of sectional type engine |
| CN114856728A (en) * | 2022-04-21 | 2022-08-05 | 中国科学院工程热物理研究所 | Load bearing structure is fallen in formula fusing of turning back of engine low pressure rotor fan end |
| CN115539147A (en) * | 2022-08-24 | 2022-12-30 | 中国航发湖南动力机械研究所 | Integrated elastic support capable of testing axial load of rotor and measuring method |
| CN115539562A (en) * | 2022-09-23 | 2022-12-30 | 郑州大学 | Squeeze film damper capable of actively and coarsely and finely adjusting oil film gap |
| CN115638209A (en) * | 2022-10-17 | 2023-01-24 | 中国航发沈阳发动机研究所 | Elastic support with eccentric structure |
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Application publication date: 20120425 |