CN1657800A - 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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- CN1657800A CN1657800A CN 200410073346 CN200410073346A CN1657800A CN 1657800 A CN1657800 A CN 1657800A CN 200410073346 CN200410073346 CN 200410073346 CN 200410073346 A CN200410073346 A CN 200410073346A CN 1657800 A CN1657800 A CN 1657800A
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Abstract
The invention is a method for preventing rotator system variation with flexible support and its device, aiming at solving the problems of high accuracy requirement and hard technique, by the relative movement of movable friction disc and still friction disc in dry friction damper to create frictional force, bring outer damping into the rotator system to decreased its variation in critical rotational speed, so that its stability is improved. The concrete method includes: mount movable friction disc and still friction disc onto axial, through pressure carried by force applicating and adjusting the pressure to change the damper value. After bringing into dry friction damper, the variation of rotator in critical rotational speed as well as its vibration can be prevented effectively; it has simple structure.
Description
(1) 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.
(2) technical background:
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.
(3) 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, can move vertically, and and movable friction plate between keep in touch by force application device institute applied pressure, 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.
(4) 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. dishes
(5) 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 and force application device (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.
Movable friction plate 4 is sleeved on the axle 10, and an end face is fixedlyed connected with yielding support 3; Bearing 5 is fixed in the endoporus of movable friction plate 4.Static friction sheet 6 is sleeved on the axle 10, be positioned at movable friction plate 4 other ends, be installed in the hole of fixed bearing 7, between the two vertically for being slidingly matched, and and can keep in touch by force application device institute applied pressure between the movable friction plate 4, and, get purpose to reach the adjusting damping value by force application device adjusting pressure.
Force application device: 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, rotor from the 500rpm raising speed to 3600rpm, reducing to 500rpm then, measured raising speed and deceleration amplitude-versus-frequency curve.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 was 370N, 510 μ m when amplitude is never introduced dry-friction damping were kept to about 100 μ m, and effectiveness in vibration suppression is fairly obvious.
Claims (2)
1. the method for an inhibition zone yielding support vibration of rotor system, it is characterized in that producing 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 by critical speed of rotation.
2. device of realizing the described inhibition zone yielding support of claim 1 vibration of rotor system, it is characterized in that this device mainly comprises movable friction plate (4), static friction sheet (6) 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, 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 true CN1657800A (en) | 2005-08-24 |
| CN100348887C CN100348887C (en) | 2007-11-14 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103257039A (en) * | 2011-12-07 | 2013-08-21 | 舍弗勒技术股份两合公司 | Device for a component test stand |
| CN104074904A (en) * | 2014-06-19 | 2014-10-01 | 西安交通大学 | Active vibration control system and method of flexible structure based on voice coil motor |
| CN104092403A (en) * | 2014-07-02 | 2014-10-08 | 西安交通大学 | Flexible truss structural vibration active suppression system and method based on piezoelectric materials |
| CN104653699A (en) * | 2015-01-22 | 2015-05-27 | 南京航空航天大学 | Vibration reduction device and vibration reduction method for super-critical rotor by using combined type vibration reduction strategy |
| CN105526304A (en) * | 2015-12-02 | 2016-04-27 | 西北工业大学 | Elastic support dry-friction damper with intelligent structure |
| 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 |
| CN105889317A (en) * | 2016-04-22 | 2016-08-24 | 西北工业大学 | Supporting structure used for measuring parameter influence characteristics of extrusion oil film damper |
| CN110686038A (en) * | 2019-10-24 | 2020-01-14 | 浙江大学 | Piezoelectric type self-balancing elastic support dry friction damper of rotor support structure of rotary machine |
| CN110778653A (en) * | 2019-10-26 | 2020-02-11 | 浙江大学 | Active elastic ring dry friction damper of rotor supporting structure of rotary machine |
| CN111458134A (en) * | 2020-05-27 | 2020-07-28 | 中国航发湖南动力机械研究所 | Rotor test switching mechanism |
| CN112303183A (en) * | 2020-10-31 | 2021-02-02 | 西北工业大学 | Main control type spring support dry friction damper applied to aircraft engine |
| CN112727988A (en) * | 2020-12-28 | 2021-04-30 | 南京航空航天大学 | Variable-rigidity damping shafting supporting device |
| CN116906498A (en) * | 2023-09-14 | 2023-10-20 | 常熟理工学院 | Piezoelectric shunt-dry friction damper with adjustable damping |
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| CN101832359B (en) * | 2010-05-21 | 2012-01-04 | 北京工业大学 | Optimization method of tuned mass damper of elastic support dry friction |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3051579B2 (en) * | 1992-09-17 | 2000-06-12 | 三菱重工業株式会社 | Dry friction damper |
| DE9420646U1 (en) * | 1994-12-23 | 1995-02-16 | Itw-Ateco Gmbh, 22844 Norderstedt | Rotary damper |
| JPH1089395A (en) * | 1996-09-13 | 1998-04-07 | Toyota Motor Corp | Damping force variable buffer device |
| CN1266398C (en) * | 2003-04-11 | 2006-07-26 | 哈尔滨工业大学 | Non linear dry friction damping shock absorber |
-
2004
- 2004-12-03 CN CNB2004100733460A patent/CN100348887C/en not_active Expired - Fee Related
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| CN103257039A (en) * | 2011-12-07 | 2013-08-21 | 舍弗勒技术股份两合公司 | Device for a component test stand |
| CN104074904A (en) * | 2014-06-19 | 2014-10-01 | 西安交通大学 | Active vibration control system and method of flexible structure based on voice coil motor |
| CN104074904B (en) * | 2014-06-19 | 2016-02-24 | 西安交通大学 | A kind of Vibration Active Control of Flexible Structure system and method based on voice coil motor |
| CN104092403A (en) * | 2014-07-02 | 2014-10-08 | 西安交通大学 | Flexible truss structural vibration active suppression system and method based on piezoelectric materials |
| CN104092403B (en) * | 2014-07-02 | 2016-04-06 | 西安交通大学 | Flexible Truss vibration based on piezoelectric initiatively presses down vibrating system and method |
| CN104653699A (en) * | 2015-01-22 | 2015-05-27 | 南京航空航天大学 | Vibration reduction device and vibration reduction method for super-critical rotor by using combined type vibration reduction strategy |
| 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 |
| CN105526304A (en) * | 2015-12-02 | 2016-04-27 | 西北工业大学 | Elastic support dry-friction damper with intelligent structure |
| 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 |
| 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 |
| CN105889317A (en) * | 2016-04-22 | 2016-08-24 | 西北工业大学 | Supporting structure used for measuring parameter influence characteristics of extrusion oil film damper |
| CN110686038A (en) * | 2019-10-24 | 2020-01-14 | 浙江大学 | Piezoelectric type self-balancing elastic support dry friction damper of rotor support structure of rotary machine |
| 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 |
| CN110778653A (en) * | 2019-10-26 | 2020-02-11 | 浙江大学 | Active elastic ring dry friction damper of rotor supporting structure of rotary machine |
| 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 |
| CN111458134A (en) * | 2020-05-27 | 2020-07-28 | 中国航发湖南动力机械研究所 | Rotor test switching mechanism |
| CN112303183A (en) * | 2020-10-31 | 2021-02-02 | 西北工业大学 | Main control type spring support dry friction damper applied to aircraft engine |
| 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 |
| CN112727988A (en) * | 2020-12-28 | 2021-04-30 | 南京航空航天大学 | Variable-rigidity damping shafting supporting device |
| CN112727988B (en) * | 2020-12-28 | 2021-11-23 | 南京航空航天大学 | Variable-rigidity damping shafting supporting device |
| CN116906498A (en) * | 2023-09-14 | 2023-10-20 | 常熟理工学院 | Piezoelectric shunt-dry friction damper with adjustable damping |
| 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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| CN100348887C (en) | 2007-11-14 |
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