CN108194577A - A kind of outer ring dislocation resistance increasing type squeeze film damper - Google Patents
A kind of outer ring dislocation resistance increasing type squeeze film damper Download PDFInfo
- Publication number
- CN108194577A CN108194577A CN201810192274.3A CN201810192274A CN108194577A CN 108194577 A CN108194577 A CN 108194577A CN 201810192274 A CN201810192274 A CN 201810192274A CN 108194577 A CN108194577 A CN 108194577A
- Authority
- CN
- China
- Prior art keywords
- damper
- outer ring
- squeeze film
- axle journal
- damping
- 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.)
- Granted
Links
- 238000013016 damping Methods 0.000 abstract description 38
- 230000001052 transient effect Effects 0.000 abstract description 9
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 26
- 238000004364 calculation method Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/16—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material
- F16F15/161—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material characterised by the fluid damping devices, e.g. passages, orifices
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The present invention proposes a kind of outer ring dislocation resistance increasing type squeeze film damper, including damper outer ring (1) and damper axle journal (3), the damper outer ring (1) is sleeved on damper axle journal (3), and there are oil clearance (2) between the damper outer ring (1) and damper axle journal (3)；The damper outer ring (1) is made of two semicircular rings, and the placement that is staggered of two semicircular rings forms outer ring two parts and is staggered place (4).With the precession of damper axle journal (3) in each semicircle loop section of the damper outer ring (1) so that oil clearance (2) tapers into.The present invention, which retains the outer perimeter section of non-centering squeeze film damper, damps larger half, and rotated 180 ° of one complete cycles of formation, forms misconstruction.Squeezing action twice is carried out to oil film when axle journal precession one week, circumferential transient state damping generates two peak values so that average damping increases, and finally improves the damping efficiency of squeeze film damper.
Description
Technical field
The invention belongs to damping vibration attenuation technical fields, and in particular to a kind of outer ring dislocation resistance increasing type squeeze film damper.
Background technology
Squeeze film damper is a kind of damper for being used for inhibiting vibration, and modern aeroengine field is extensively using crowded
Press film damper that rotor is inhibited to be vibrated as caused by the factors such as out-of-balance force, squeeze film damper has rotor stability
Vital effect.The vibration attenuation mechanism of squeeze film damper is the vibration that engine rotor is absorbed using oil film, oil
Film generates oil-film damping, and the damping of engine rotor supporting system is mainly generated by oil film.Therefore, this ginseng of oil-film damping
Number is of crucial importance for engine overall performance, if it is possible to oil-film damping is suitably improved, for improving squeeze film
The damping efficiency of damper is particularly important.But while oil-film damping increase, oil film rigidity also shows non-linear therewith
Increased trend.At present, the centring type largely used in practical applications and the outer ring of Non-centering squeeze film damper with
Necked part is circle, forms one layer of circular ring shape oil film in the gap location of the two, as shown in Figure 1.Centring type squeeze film hinders
Average damping in Buddhist nun's device a cycle is difficult further to improve oil-film damping and rigidity is joined by this circular ring shape oil film structure
Number；And the transient state damping of Non-centering squeeze film damper and stiffness variation are similar to sine curve, although as shown in Fig. 2,
Average damping and rigidity in a cycle are varied from compared to centring type squeeze film damper, but the damping of circumferential transient state and
Only there are one peak values for rigidity, limited to the average damping in a cycle and the change of rigidity.
Invention content
In view of the deficiencies of the prior art, the present invention proposes a kind of outer ring dislocation resistance increasing type squeeze film damper, including resistance
Buddhist nun's device outer ring (1) and damper axle journal (3), the damper outer ring (1) are sleeved on damper axle journal (3), the damper
There are oil clearance (2) between outer ring (1) and damper axle journal (3)；The damper outer ring (1) is made of two semicircular rings,
And the placement that is staggered of two semicircular rings forms outer ring two parts and is staggered place (4).
With the precession of damper axle journal (3) in each semicircle loop section of the damper outer ring (1) so that between oil film
Gap (2) tapers into.
There are 80 ° of angles (5) for the staggered positions at the place (4) that is staggered and vertical direction.
Beneficial effects of the present invention：
The present invention proposes a kind of outer ring dislocation resistance increasing type squeeze film damper, and damper outer ring is transformed for this patent proposition
Into the scheme of misconstruction, outer ring is transformed on the basis of non-centering squeeze film damper.Since non-centering squeezes
Film damper in a precession period oil film rigidity and damping all there are a peak value, and two peak values are in different circumferential directions
Position.Therefore, the outer perimeter section of non-centering squeeze film damper is retained and damps larger half, and rotated 180 ° of shapes
Into a complete cycle, misconstruction is formed.Squeezing action twice is carried out to oil film when axle journal precession one week, circumferential transient state damping generates
Two peak values so that average damping increases, and finally improves the damping efficiency of squeeze film damper.
Description of the drawings
Fig. 1 is traditional squeeze film damper cross section structure schematic diagram；
Wherein, a be centring type squeeze film damper, b Non-centering squeeze film dampers；
Fig. 2 is damping and the stiffness curve of rotor journal difference precession angle；
Wherein, the damping curve of a rotor journals difference precession angle, the stiffness curve of b rotor journal difference precession angles；
Fig. 3 is dislocation resistance increasing type squeeze film damper cross section structure schematic diagram in outer ring in the specific embodiment of the invention；
Wherein, 1- dampers outer ring axle journal, 2- oil clearances, 3- damper axle journals, 4- are staggered place, 5- angles；
Fig. 4 is to obtain centring type by ANSYS simulation calculation softwares and Non-centering squeezes in the specific embodiment of the invention
Press film damper and the variation of the oil film circumferential direction transient state damping of the outer ring dislocation resistance increasing type squeeze film damper of the present invention bent
Line；
Fig. 5 is to be obtained in the specific embodiment of the invention by ANSYS simulation calculation softwares in centring type and Non-centering
Oil film in the case of squeeze film damper damping identical with the outer ring dislocation resistance increasing type squeeze film damper offer of the present invention
The change curve of circumferential transient state rigidity.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes.
In view of the problems of the existing technology, the present invention provides a kind of outer ring dislocation resistance increasing type squeeze film damper,
On the architecture basics of non-centering squeeze film damper, structure of modification only is carried out to damper outer ring so that squeeze film hinders
The oil-film damping of Buddhist nun's device is effectively improved, and further improves the damping efficiency of squeeze film damper.
A kind of outer ring dislocation resistance increasing type squeeze film damper, as shown in figure 3, including damper outer ring 1 and damper shaft
Neck 3, the damper outer ring 1 are sleeved on damper axle journal 3, and there are oil between the damper outer ring 1 and damper axle journal 3
Intermembrane space 2；The damper outer ring 1 is made of two semicircular rings, and two semicircular rings are staggered that form outer ring two parts wrong for placement
Open place 4.
There is 80 ° of angle 5 in staggered positions and the vertical direction at the place 4 that is staggered, the damper outer ring 1 it is each partly
With the precession of damper axle journal 3 in ring part so that oil clearance 2 tapers into.
In order to preferably verify that the outer ring of present invention dislocation resistance increasing type squeeze film damper can effectively improve oil film resistance
Buddhist nun specifically employs ANSYS simulation calculations software to centring type and Non-centering squeeze film damper and the outer ring of the present invention
Dislocation resistance increasing type squeeze film damper has carried out the simulation calculation of oil-film damping respectively.Centring type and Non-centering squeeze film
Damper has identical structural parameters with the outer ring dislocation resistance increasing type squeeze film damper of the present invention, and structural parameters are as follows
Table：
1 structural parameters (unit of table：mm)
In the outer ring of present invention dislocation resistance increasing type squeeze film damper, retain Non-centering squeeze film damper week
To with part that Y-axis forward direction angulation is 80 ° to 260 ° and rotate 180 ° and forming damper outer rings of the invention.
It is found that shown in the movement expression formula such as formula (1) of damper axle journal and (2)：
X=e.cos (Ω t) (1)
Y=esin (Ω t) (2)
Wherein, e=c ε are damper axle journal eccentricity, and c is oil clearance, and ε is eccentricity, and Ω is revolution angular speed, this
In embodiment, e 0.015mm, revolution angular velocity vector Ω is 471rad/s.The lubricating oil parameter of simulation calculation is：Lubricating oil density is
885kg/m2, oil viscosity 0.0168Pas, export boundary condition pressure is atmospheric pressure.
It is found that shown in the calculation formula of oil-film damping and rigidity such as formula (3) and (4)：
In formula, C is oil-film damping, and K is oil film rigidity, FtFor oil film tangential force, F suffered by damper axle journalrFor damper shaft
Oil film radial load suffered by neck, e are damper axle journal eccentricity, and Ω is revolution angular speed.
In present embodiment, the change curve of oil film circumferential direction transient state damping is can obtain by ANSYS simulation calculation softwares, such as
Shown in Fig. 4.Average damping in one week is given in Table 2, flat by circumferential transient state damping change curve graph and in one week
Equal damping value can significantly find that squeeze film damper of the invention is damped with the squeeze film of centring type and Non-centering
Device is compared, and under the conditions of identical dynamic bias, oil-film damping is improved significantly, and finally improves subtracting for squeeze film damper
It shakes efficiency.
Average damping value (unit in table 2 one weeks：Ns/m)
| Centring type squeeze film damper | Non-centering squeeze film damper | The present invention |
| 89.6 | 99.7 | 136 |
In addition it is computed it is found that for centring type squeeze film damper and Non-centering squeeze film damper to carry
For the damping identical with this patent, then the precession amplitude of bigger is needed.On the one hand the precession amplitude of bigger can make the vibration of rotor
On the other hand increase can generate the oil film rigidity of bigger, the change curve such as Fig. 5 institutes for the oil film circumferential direction transient state rigidity being calculated
Show, the mean rigidity in one week is provided in table 3.
Mean rigidity value (unit in table 3 one weeks：N/m)
| Centring type squeeze film damper | Non-centering squeeze film damper | The present invention |
| 5.25×104 | 4.66×104 | 1.63×104 |
In summary, the oil film rigidity of Non-centering squeeze film damper and damping occur one in one cycle
Peak value, and the circumferential position for peak value occur is different.Therefore, by selecting suitable angle by non-centering squeeze film damper
Subdivision, and 180 ° are rotated, form this patent.While so that two minor peaks occurs in one cycle in oil-film damping, and it can make
Oil film rigidity peak value is inhibited.
Claims (3)
- The resistance increasing type squeeze film damper 1. a kind of outer ring misplaces, which is characterized in that including damper outer ring (1) and damper shaft Neck (3), the damper outer ring (1) are sleeved on damper axle journal (3), the damper outer ring (1) and damper axle journal (3) Between there are oil clearance (2)；The damper outer ring (1) is made of two semicircular rings, and two semicircular rings are staggered and place shape It is staggered place (4) into outer ring two parts.
- The resistance increasing type squeeze film damper 2. outer ring according to claim 1 misplaces, which is characterized in that outside the damper It encloses in each semicircle loop section of (1) with the precession of damper axle journal (3) so that oil clearance (2) tapers into.
- The resistance increasing type squeeze film damper 3. outer ring according to claim 1 misplaces, which is characterized in that the place that is staggered (4) there are 80 ° of angles (5) for staggered positions and vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810192274.3A CN108194577B (en) | 2018-03-09 | 2018-03-09 | Outer ring dislocation resistance-increasing type extrusion oil film damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810192274.3A CN108194577B (en) | 2018-03-09 | 2018-03-09 | Outer ring dislocation resistance-increasing type extrusion oil film damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108194577A true CN108194577A (en) | 2018-06-22 |
| CN108194577B CN108194577B (en) | 2024-05-10 |
Family
ID=62595409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810192274.3A Active CN108194577B (en) | 2018-03-09 | 2018-03-09 | Outer ring dislocation resistance-increasing type extrusion oil film damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108194577B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139796A (en) * | 2018-10-22 | 2019-01-04 | 沈阳航空航天大学 | A kind of fixed end seal formula squeeze film damper |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM267358U (en) * | 2004-11-29 | 2005-06-11 | Newcera Technology Co Ltd | Liquid pressurization bearing |
| JP2010209956A (en) * | 2009-03-09 | 2010-09-24 | Ihi Corp | Analysis method for squeeze film damper bearing |
| CN102852976A (en) * | 2012-08-28 | 2013-01-02 | 常州市索特动力工程有限公司 | Turbocharger oil film suspension sliding bearing |
| CN103047420A (en) * | 2013-01-18 | 2013-04-17 | 沈阳航空航天大学 | Novel high-stability staggering round sealing structure |
| DE102012219317A1 (en) * | 2012-09-27 | 2014-03-27 | Siemens Aktiengesellschaft | Hydrodynamic slide bearing for attenuation of imbalances in e.g. drive shaft, has bearing bush whose central axis is displaced in relation to axis of shaft along radius of bush around value that is adjusted in static state of bearing |
| CN203604442U (en) * | 2013-10-22 | 2014-05-21 | 申科滑动轴承股份有限公司 | Water-lubricated bearing |
| CN207975186U (en) * | 2018-03-09 | 2018-10-16 | 沈阳航空航天大学 | A kind of outer ring dislocation resistance increasing type squeeze film damper |
-
2018
- 2018-03-09 CN CN201810192274.3A patent/CN108194577B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM267358U (en) * | 2004-11-29 | 2005-06-11 | Newcera Technology Co Ltd | Liquid pressurization bearing |
| JP2010209956A (en) * | 2009-03-09 | 2010-09-24 | Ihi Corp | Analysis method for squeeze film damper bearing |
| CN102852976A (en) * | 2012-08-28 | 2013-01-02 | 常州市索特动力工程有限公司 | Turbocharger oil film suspension sliding bearing |
| DE102012219317A1 (en) * | 2012-09-27 | 2014-03-27 | Siemens Aktiengesellschaft | Hydrodynamic slide bearing for attenuation of imbalances in e.g. drive shaft, has bearing bush whose central axis is displaced in relation to axis of shaft along radius of bush around value that is adjusted in static state of bearing |
| CN103047420A (en) * | 2013-01-18 | 2013-04-17 | 沈阳航空航天大学 | Novel high-stability staggering round sealing structure |
| CN203604442U (en) * | 2013-10-22 | 2014-05-21 | 申科滑动轴承股份有限公司 | Water-lubricated bearing |
| CN207975186U (en) * | 2018-03-09 | 2018-10-16 | 沈阳航空航天大学 | A kind of outer ring dislocation resistance increasing type squeeze film damper |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139796A (en) * | 2018-10-22 | 2019-01-04 | 沈阳航空航天大学 | A kind of fixed end seal formula squeeze film damper |
| CN109139796B (en) * | 2018-10-22 | 2023-08-29 | 沈阳航空航天大学 | Fixed end sealing type extrusion oil film damper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108194577B (en) | 2024-05-10 |
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