CN100348887C - Method and device for suppression of vibration of rotor system with elastic support - Google Patents
Method and device for suppression of vibration of rotor system with elastic support Download PDFInfo
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- CN100348887C CN100348887C CNB2004100733460A CN200410073346A CN100348887C CN 100348887 C CN100348887 C CN 100348887C CN B2004100733460 A CNB2004100733460 A CN B2004100733460A CN 200410073346 A CN200410073346 A CN 200410073346A CN 100348887 C CN100348887 C CN 100348887C
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Abstract
The present invention relates to a method and a device for the vibration suppression of a rotor system with elastic support. In order to overcome the defects of high accuracy requirement and difficulty technology, the present invention uses the relative movement of a movable friction sheet and a still friction sheet in a dry friction damper to produce frictional force. External damping is introduced in the rotor system so as to reduce the vibration of the rotor system when passing through a critical rotating speed and improve the running stability of the rotor system. The specific method comprises the following steps: the movable friction sheet and the still friction sheet are sheathed on a shaft; contact is maintained by pressure which is exerted by a force applying device, and the pressure is adjusted so as to achieve the purpose of adjusting a damping value. After dry friction damping is introduced, the vibration of a rotor can obtain effective suppression when the rotor passes through the critical rotating speed. The unstable vibration of the rotor can also be prevented. The device has the advantages of simple structure, easy control of applied damping, little external influence, etc. The device has wide application prospect in the active control field.
Description
One, technical field
The present invention relates to mechanical field, is a kind of method and device of inhibition zone yielding support vibration of rotor system.
Two, background technique
Along with the develop rapidly of modern industrial technology, a large amount of rotor-support-foundation systems has adopted the flexible rotor design.Because yielding support can reduce rotor critical speed, and has certain supporting damping effect, so obtained application, especially aviation power engineering field widely in flexible rotor, modern aeroengine has mostly adopted the flexible rotor design that has elastic support structure.But adopt elastic support structure also to bring corresponding problem, because when rotor passes through critical speed of rotation, yielding support will produce bigger distortion, along with coming and going, rotor passes through critical speed of rotation, yielding support has just produced cyclic deformation, makes the strength problem of rotor be converted into the distortion and the strength problem of supporting structure.Therefore the vibration of introducing external damping reduction rotor-support-foundation system in system is very necessary, and the way of the introducing damping of often adopting has squeeze film damper, metal-rubber damper etc. at present, but these methods all exist certain defective in varying degrees.For example the squeeze film damper that extensively adopts in actual engineering field has the advantage of good damping result, if but the imbalance that manufactures and designs bad or rotor worsen, will increase considerably the non-linear of oil-film force, cause many harmful nonlinear responses.
Dry-friction damping is widely used as the vibration damping means always, plays an important role in the engineering fields such as earthquake basis isolation of Rail Highway suspension system, tall building.In recent years, utilizing dry-friction damping to carry out the blade of aviation engine vibration damping becomes the new and high technology of quite being paid close attention to especially and has obtained deep research, and is applied in the design of novel aeroengine.Yet the problem of also having no talent at present dry-friction damping and rotor-support-foundation system vibration damping combines.
Three, summary of the invention
For overcoming the required precision height that exists in the prior art, the deficiency that technology difficulty is big the present invention proposes a kind of method of introducing dry-friction damping inhibition zone yielding support vibration of rotor system.
The technical solution used in the present invention is to produce frictional force by the relative movement between the dynamic and static friction plate in the dry damping device, in rotor-support-foundation system, introduce external damping, to reduce the vibration of rotor-support-foundation system the time, improve the stability of rotor-support-foundation system running by critical speed of rotation.
The dry damping device that the present invention proposes mainly comprises movable friction plate, static friction sheet and force application device.Wherein movable friction plate is sleeved on the axle, fixedlys connected with yielding support; Bearing fixing is in the endoporus of movable friction plate; The static friction sheet is positioned at movable friction plate one side, is installed in the hole of fixed bearing, does not radially move, but can move vertically, and and keep in touch by force application device institute applied pressure between the movable friction plate, regulate pressure by force application device, to reach the purpose of regulating damping value.
Working method of the present invention is: when stationary rotor, yielding support is a state of rest also, does not have relative displacement between the friction plate, does not also just produce friction; When rotor oscillation, produce relative displacement between the movable friction plate of yielding support end face and the static friction sheet, produce dry friction between two friction plates, for rotor-support-foundation system provides damping, thus the vibration when reducing rotor-support-foundation system by critical speed of rotation.
The technical solution adopted in the present invention is to propose a kind of effective inhibition method at having flexibly mounted vibration of rotor system problem, introduce after the dry-friction damping, the vibration of rotor during by critical speed of rotation will be suppressed effectively, can also prevent the unstable Vibration of rotor.The introducing of dry-friction damping with respect to prior aries such as squeeze film damper have simple in structure, apply damping and be easy to control, be subjected to advantages such as ectocine is less.This method can also be used in combination with other means simultaneously, and because damping is easy to control, in the ACTIVE CONTROL field wide application prospect is arranged.
Four, description of drawings
Accompanying drawing 1 utilizes spring to apply the dry damping device structure drawing of device of power;
Accompanying drawing 2 dry damping device structural representations;
Accompanying drawing 3.1 applies the effectiveness in vibration suppression (the raising speed amplitude-versus-frequency curve relatively) after the dry-friction damping
Accompanying drawing 3.2 applies the effectiveness in vibration suppression (the reduction of speed amplitude-versus-frequency curve relatively) after the dry-friction damping
Wherein:
1. coupling 2. bearings 3. yielding supports 4. movable friction plates
5. guide rod before bearing 6. static friction sheets 7. fixed bearings 8. springs
9. 10. 11. spring back-guiding rod 12. pressing plates of spring
13. spring strut 14. dish A. force application device
Five, embodiment
Present embodiment is introduced the external damping that dry friction produces in rotor-support-foundation system, to reduce the vibration of rotor-support-foundation system by critical speed of rotation the time, improve the stability of rotor-support-foundation system running.
Present embodiment designs corresponding dry damping device according to the structure of rotor-support-foundation system, adopts widely used rotor cage type elastic support structure, and having set up is the dry damping device of the mode that applies of power with the spring.In the present embodiment, utilize in the dry damping device relative movement between the dynamic and static friction plate to produce frictional force and provide external damping to rotor-support-foundation system, its working method is not for when rotor vibrates, and yielding support is a state of rest, do not have relative displacement between the friction plate, just do not produce friction yet; When rotor oscillation, produce relative displacement between the movable friction plate of yielding support end face and the static friction sheet, produce dry friction between two friction plates, for rotor-support-foundation system provides damping, thus the vibration when reducing rotor-support-foundation system by critical speed of rotation.
Present embodiment mainly comprises flexible rotor system, movable friction plate 4, static friction sheet 6, yielding support 3, fixed bearing 7 and force application device A (Fig. 1), and force application device adopts spring as force mechanism.
Flexible rotor system: mainly comprise yielding support 3, bearing 5, axle 10 and dish 14.Yielding support 3 adopts rotor cage type elastic support, by being bolted on the bearing 2.Bearing 5 is by being tightly fixed in movable friction plate 4.
Force application device A: form by guide rod before the spring 8, spring back-guiding rod 11, spring 9, pressing plate 12, spring strut 13.Spring strut 13 is sleeved on the axle 10, by being bolted on the bearing 7, is independent of rotor-support-foundation system; Spring 9, preceding guide rod 8 and back-guiding rod 11 are contained in the tube respectively: two guide rods 8,11 are sleeved on the axle 10, are positioned at spring 9 two ends, and its effect is to make spring 9 homogeneous deformation vertically, and the impacting force that produces can vertically be carried on the static friction sheet 6 uniformly.Spring strut 13 inwalls are screw thread, and pressing plate 12 matches with spring strut 13 by screw thread, and when regulating the position of pressing plate 12 in spring strut 13, the impacting force that compressible spring 9 obtains expecting for the quiet sheet 6 that rubs provides impacting force, keeps the contact between the dynamic and static friction plate.
In the present embodiment, the sized data of dry damping device and rotor-support-foundation system is as follows: dish radius 120mm, thickness 40mm, the radius 14mm of the length of axle (two bearing mid point between distance) 715mm, axle.The actual stiffness coefficient that records rotor cage type elastic support is 5.7167 * 10
5N/m.The elasticity coefficient of spring is 17.64N/mm through measuring.The material of the dynamic and static sheet that rubs is the A3 steel, and friction factor is 0.15.
Fig. 3 .1, Fig. 3 .2 are under different impacting forces, and rotor from 500 rev/mins of raising speeds to 3600 rev/min, is being reduced to 500 rev/mins, measured raising speed and deceleration amplitude-versus-frequency curve then.Wherein positive pressure illustrates as parameter.The result shows among the figure, no matter be boosting velocity procedure or moderating process, the elastic support and dry friction damper all has tangible effectiveness in vibration suppression in the critical speed of rotation zone.When impacting force is 370 Newtonian times, 510 μ m when amplitude is never introduced dry-friction damping are kept to about 100 μ m, and effectiveness in vibration suppression is fairly obvious.
Claims (1)
1. the device of an inhibition zone yielding support vibration of rotor system, it is characterized in that this device mainly comprises movable friction plate (4), static friction sheet (6), fixed bearing (7) and force application device, wherein movable friction plate (4) is sleeved on the axle (10), fixedlys connected with yielding support (3); Bearing (5) is fixed in the endoporus of movable friction plate (4); Static friction sheet (6) is positioned at movable friction plate (4) one sides, is installed in the hole of fixed bearing (7), does not radially move, can move vertically, and and movable friction plate (4) between keep in touch by force application device institute applied pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100733460A CN100348887C (en) | 2004-12-03 | 2004-12-03 | Method and device for suppression of vibration of rotor system with elastic support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100733460A CN100348887C (en) | 2004-12-03 | 2004-12-03 | Method and device for suppression of vibration of rotor system with elastic support |
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| CN1657800A CN1657800A (en) | 2005-08-24 |
| CN100348887C true CN100348887C (en) | 2007-11-14 |
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| CNB2004100733460A Expired - Fee Related CN100348887C (en) | 2004-12-03 | 2004-12-03 | Method and device for suppression of vibration of rotor system with elastic support |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832359A (en) * | 2010-05-21 | 2010-09-15 | 北京工业大学 | Optimization method of tuned mass damper of elastic support dry friction |
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| DE102011087909B3 (en) * | 2011-12-07 | 2013-05-29 | Schaeffler Technologies AG & Co. KG | Arrangement for component test stand, particularly centrifugal test stand for testing test sample, comprises damping system with multiple damping units, which are arranged in hexapod arrangement corresponding to component side bearing |
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| CN104653699B (en) * | 2015-01-22 | 2016-08-24 | 南京航空航天大学 | Use the supercritical rotor oscillation damping method of combined damping strategy |
| CN105526304B (en) * | 2015-12-02 | 2018-03-30 | 西北工业大学 | A kind of intelligence structure cartridge branch dry damping device |
| 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 |
| CN105889317B (en) * | 2016-04-22 | 2018-03-27 | 西北工业大学 | For determining the supporting structure of squeeze film damper parameter influencing characterisitic |
| CN110686038B (en) * | 2019-10-24 | 2024-02-09 | 浙江大学 | Piezoelectric self-balancing elastic support dry friction damper of rotary machine rotor supporting structure |
| CN110778653B (en) * | 2019-10-26 | 2020-11-03 | 浙江大学 | Active elastic ring dry friction damper of rotor supporting structure of rotary machine |
| CN111458134B (en) * | 2020-05-27 | 2021-11-09 | 中国航发湖南动力机械研究所 | Rotor test switching mechanism |
| CN112303183B (en) * | 2020-10-31 | 2022-03-15 | 西北工业大学 | Main control type spring support dry friction damper applied to aircraft engine |
| CN112727988B (en) * | 2020-12-28 | 2021-11-23 | 南京航空航天大学 | Variable-rigidity damping shafting supporting device |
| CN116906498B (en) * | 2023-09-14 | 2024-01-12 | 常熟理工学院 | Piezoelectric shunt-dry friction damper with adjustable damping |
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| JPH06101730A (en) * | 1992-09-17 | 1994-04-12 | Mitsubishi Heavy Ind Ltd | Dry friction damper |
| US5605208A (en) * | 1994-12-23 | 1997-02-25 | Itw Ateco Gmbh | Rotary damper |
| JPH1089395A (en) * | 1996-09-13 | 1998-04-07 | Toyota Motor Corp | Damping force variable buffer device |
| CN1514146A (en) * | 2003-04-11 | 2004-07-21 | 哈尔滨工业大学 | Non linear dry friction damping shock absorber |
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2004
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Patent Citations (4)
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| JPH06101730A (en) * | 1992-09-17 | 1994-04-12 | Mitsubishi Heavy Ind Ltd | Dry friction damper |
| US5605208A (en) * | 1994-12-23 | 1997-02-25 | Itw Ateco Gmbh | Rotary damper |
| JPH1089395A (en) * | 1996-09-13 | 1998-04-07 | Toyota Motor Corp | Damping force variable buffer device |
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| 带弹性支承和挤压油膜阻尼器高速柔性转子系统稳态不平衡响应分析 刘庆明，庞志成.哈尔滨工业大学学报，第25卷第4期 1993 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832359A (en) * | 2010-05-21 | 2010-09-15 | 北京工业大学 | Optimization method of tuned mass damper of elastic support dry friction |
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| CN1657800A (en) | 2005-08-24 |
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