CN109668717B - Double-layer oil film double-support squeeze oil film damper - Google Patents
Double-layer oil film double-support squeeze oil film damper Download PDFInfo
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- CN109668717B CN109668717B CN201811541611.1A CN201811541611A CN109668717B CN 109668717 B CN109668717 B CN 109668717B CN 201811541611 A CN201811541611 A CN 201811541611A CN 109668717 B CN109668717 B CN 109668717B
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- Prior art keywords
- ring
- support
- oil film
- double
- ring body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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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
- 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
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/1203—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon characterised by manufacturing, e.g. assembling or testing procedures for the damper units
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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
- 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
- F16F15/164—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material characterised by manufacturing, e.g. assembling or testing procedures
Abstract
The invention discloses a double-layer oil film double-support squeeze oil film damper, which comprises a support cover, a floating ring, a squirrel cage and an oil sealing piston ring, wherein the support cover is arranged on the support cover; the floating ring comprises a cylindrical ring body, a support part extending outwards from one end of the ring body, and a turning part returning and extending backwards from the top end of the support part, wherein the turning part is also cylindrical, and the turning part forms an elastic structure relative to the ring body through the support part. The floating ring is provided with a return type elastic support structure and is arranged on the oil film outer ring. The number of oil sealing piston rings is 3, wherein the far end of the mounting edge is sealed by one piston ring, the near end oil film of the mounting edge is divided into two layers by a floating ring, and the inner layer oil film and the outer layer oil film are respectively divided by one piston ring. According to the invention, the ring body, the support part and the turn-back part form a turn-back type elastic support, so that the vibration reduction performance of the squeeze film damper can be enhanced, the problem of collision and abrasion failure of the inner ring and the outer ring of an oil film of the traditional squeeze film damper is effectively avoided, the verification and correction of a simulation model are facilitated, and test data support is provided for engineering application of the simulation model.
Description
Technical Field
The invention relates to an extrusion oil film damper for a vibration reduction component of an aeroengine.
Background
The squeeze film damper is generally applied to a rotor part of an aircraft engine and used for vibration reduction of the rotor part, along with the development of the aviation industry, the structure of the aircraft engine is gradually complex, the vibration problem of the rotor part is more and more prominent, the traditional squeeze film damper is difficult to meet the vibration reduction requirement, the traditional squeeze film damper is easy to lose effectiveness in practical application, and the inner ring and the outer ring are easy to generate the collision and abrasion phenomenon.
Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
The invention aims to solve the problem that the inner-layer oil film pressure is difficult to measure in the previous test research of the floating ring type squeeze oil film damper, provide test support for verifying the correctness of the established simulation model and improve the safety of the test.
In order to achieve the above object, the present invention adopts the following technical solutions:
a double-layer oil film double-support squeeze oil film damper comprises a cylindrical support cover, a floating ring and a squirrel cage, wherein the floating ring is positioned in the support cover and is coaxially arranged with the support cover;
the floating ring comprises a cylindrical ring body, a support part extending outwards from one end of the ring body, and a turn-back part extending backwards from the top end of the support part, wherein the turn-back part is also cylindrical, and the turn-back part forms an elastic structure relative to the ring body through the support part; the tail end of the turning part extends upwards to form a mounting edge which is fixed on the end surface of the supporting cover; the ring body is located between the supporting cover and the mouse cage, a near-end outer-layer oil sealing expansion ring is arranged between the ring body and the supporting cover, a near-end inner-layer oil sealing expansion ring is arranged between the ring body and the mouse cage, and the other end of the ring body, opposite to the support portion, abuts against a far-end oil sealing expansion ring.
Furthermore, an outer oil film is sealed in a space surrounded by the ring body, the supporting cover, the far-end oil sealing piston ring and the near-end outer oil sealing piston ring.
Furthermore, an inner oil film is sealed in a space enclosed by the ring body, the squirrel cage, the far-end oil sealing piston ring and the near-end inner oil sealing piston ring.
Furthermore, the mounting edge of the floating ring is fixed at the front end of the support cover through a bolt.
Further, the squirrel cage and the support cover are installed at both sides of the bushing.
Has the advantages that:
(1) the ring body, the support part and the turn-back part form a turn-back type elastic support, so that the vibration damping performance of the squeeze film damper can be enhanced, and the problem of collision and abrasion failure of the inner ring and the outer ring of an oil film of the traditional squeeze film damper is effectively solved;
(2) the invention can be used for experimental study of the vibration reduction characteristic of the floating ring belt elastic support double-layer oil film double-support extrusion oil film damper, and verifying and correcting a simulation model to provide test data support for engineering application;
(3) the floating ring has certain rigidity, the vortex floating is reduced, and the distribution condition of oil films on the inner layer and the outer layer can be improved; meanwhile, the installation edge on the turning-back part is directly fixed with the supporting cover to limit the rotation of the floating ring, and the design of pins, bosses and the like which are newly added for limiting the rotation of the floating ring is simplified;
(4) according to the invention, the squirrel cage is used as an elastic support, and the floating ring body, the support part and the turning part form another elastic support, so that the adjusting space of the elastic support rigidity of the floating ring is larger; the adaptability is enhanced; the design of the double-elastic supporting structure has a certain oil return effect on the oil return of the outer oil film, so that the utilization rate of the laboratory space is improved; the oil sealing design of the inner and outer layer piston rings is used near the mounting edge, so that the structure is simplified, and meanwhile, the centering of the floating ring is realized.
Drawings
Fig. 1 is a perspective view of a floating ring in accordance with the present invention.
FIG. 2 is a cross-sectional view of a floating ring in accordance with the present invention.
FIG. 3 is an overall assembly structure diagram of the double-layer oil film double-support squeeze oil film damper of the invention.
Fig. 4 is a cross-sectional view of the floating ring, squirrel cage and support cover of the present invention in a mated state.
Fig. 5 is a perspective view of the squirrel cage of the present invention.
Fig. 6 is a perspective view of the support cover of the present invention.
Detailed Description
Preferred embodiments of the apparatus and method of the present invention are described in further detail below with reference to the accompanying drawings.
Referring to fig. 1 to 6, the invention discloses a double-layer oil film double-support squeeze film damper, which comprises a cylindrical support cover 1, a floating ring 6 positioned in the support cover 1 and coaxially arranged with the support cover 1, and a squirrel cage 8 positioned in the floating ring 6 and coaxially arranged with the floating ring 6.
As shown in fig. 1 and fig. 2, the floating ring 6 includes a cylindrical ring body 61, a support portion 62 extending outward from one end of the ring body 61, and a folded portion 63 extending backward from a top end of the support portion 62. The folded-back portion 63 is also cylindrical. The folded portion 63 forms an elastic structure opposite to the ring body through the bracket portion 62. And a mounting edge 64 extending upward from the tip end of the folded portion 63, wherein the mounting edge 64 is fixed to the front end surface of the support cover 1 by bolts.
As shown in fig. 3 and 4, the ring 61 is located between the supporting cover 1 and the squirrel cage 8. A near-end outer-layer oil sealing piston ring 5 is arranged between the ring body 61 and the supporting cover 1, and a near-end inner-layer oil sealing piston ring 4 is arranged between the ring body 61 and the squirrel cage 8. The other end of the ring body 61 opposite to the bracket part 62 is abutted with the distal oil sealing piston ring 7. An outer oil film is sealed in a space surrounded by the ring body 61, the supporting cover 1, the far-end oil sealing piston ring 7 and the near-end outer oil sealing piston ring 5. An inner oil film is sealed in a space enclosed by the ring body 61, the squirrel cage 8, the far-end oil sealing piston ring 7 and the near-end inner oil sealing piston ring 4. The far end of the mounting edge is sealed with oil by an expansion ring, and the near end of the mounting edge is sealed with oil by an inner expansion ring and an outer expansion ring, which is beneficial to centering the floating ring 6.
The squirrel cage 8 serves as one elastic support, and the ring body 61, the bracket part 62 and the folded part 63 of the floating ring 6 serve as the other elastic support, so that a double-elastic support structure in the damper is formed.
As shown in fig. 3, the damper further includes a bushing 9. The supporting cover 1 and the squirrel cage 8 are respectively matched with the cylindrical surface on the lining 9 in a centering way, are in transition fit and are filled by knocking of red copper; the supporting cover 1 and the squirrel cage 8 are respectively arranged at two sides of the lining 9; the bearing cover 1, the bushing 9 and the squirrel cage 8 can be installed independently of the support 10, and in the independent case, the piston ring and the floating ring 6 are vertically installed into the squirrel cage 8 and the bearing cover 1, the core rod 11 is installed into the squirrel cage 8, the squirrel cage 8 and the bearing cover 1 are installed into the bushing 9, the installation difficulty can be reduced, and then the support is integrally installed.
In the test, the oil film characteristics of the squeeze oil film dampers with different oil film thicknesses are tested, and the squirrel cage 8 or the supporting cover 1 needs to be replaced; the squirrel cage 8 and the supporting cover 1 are respectively arranged at two sides of the lining 9, so that the dismounting and the replacement are convenient and do not interfere with each other;
besides the through hole for fixing, the mounting edge of the bush is also provided with a threaded hole for dismounting.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above examples are not intended to limit the present invention in any way, and all technical solutions obtained by means of equivalents or equivalent changes fall within the protection scope of the present invention.
Claims (5)
1. A double-layer oil film double-support squeeze oil film damper is characterized by comprising a cylindrical support cover, a floating ring which is positioned in the support cover and is coaxially arranged with the support cover, and a squirrel cage which is positioned in the floating ring and is coaxially arranged with the floating ring;
the floating ring comprises a cylindrical ring body, a support part extending outwards from one end of the ring body, and a turn-back part extending backwards from the top end of the support part, wherein the turn-back part is also cylindrical, and the turn-back part forms an elastic structure relative to the ring body through the support part; the tail end of the turning part extends upwards to form a mounting edge which is fixed on the end surface of the supporting cover; the ring body is located between the supporting cover and the mouse cage, a near-end outer-layer oil sealing expansion ring is arranged between the ring body and the supporting cover, a near-end inner-layer oil sealing expansion ring is arranged between the ring body and the mouse cage, and the other end of the ring body, opposite to the support portion, abuts against a far-end oil sealing expansion ring.
2. The double-layer oil film double-support squeeze oil film damper as claimed in claim 1, wherein an outer oil film is sealed in a space surrounded by the ring body, the support cover, the distal oil seal piston ring and the proximal outer oil seal piston ring.
3. The double-layer oil film double-support squeeze oil film damper as claimed in claim 2, wherein an inner oil film is sealed in a space surrounded by the ring body, the squirrel cage, the far-end oil sealing piston ring and the near-end inner oil sealing piston ring.
4. The double-layer oil film double-support squeeze oil film damper according to claim 3, wherein the mounting edge of the floating ring is fixed at the front end of the support cover by a bolt.
5. The double layer oil film dual support squeeze oil film damper of claim 1 wherein squirrel cage and support covers are mounted on both sides of the bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811541611.1A CN109668717B (en) | 2018-12-17 | 2018-12-17 | Double-layer oil film double-support squeeze oil film damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811541611.1A CN109668717B (en) | 2018-12-17 | 2018-12-17 | Double-layer oil film double-support squeeze oil film damper |
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| Publication Number | Publication Date |
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| CN109668717A CN109668717A (en) | 2019-04-23 |
| CN109668717B true CN109668717B (en) | 2020-07-28 |
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| CN201811541611.1A Active CN109668717B (en) | 2018-12-17 | 2018-12-17 | Double-layer oil film double-support squeeze oil film damper |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112762133B (en) * | 2021-01-28 | 2021-09-21 | 大连理工大学 | Squirrel-cage type squeeze film damper |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5080499A (en) * | 1990-03-23 | 1992-01-14 | General Motors Corporation | High temperature squeeze film damper |
| US5215384A (en) * | 1992-04-16 | 1993-06-01 | Dresser-Rand Company | Self-centering squeeze film damper bearing |
| US5251985A (en) * | 1991-09-26 | 1993-10-12 | General Electric Company | Squeeze film damper seal |
| CN2769611Y (en) * | 2004-11-04 | 2006-04-05 | 北京航空航天大学 | Adaptive squeezing oil film damper with metal rubber external ring |
| CN102425639A (en) * | 2011-11-30 | 2012-04-25 | 中国航空动力机械研究所 | Elastic supporting structure |
| CN104455143A (en) * | 2014-12-23 | 2015-03-25 | 江苏理工学院 | Magnetic damper with floating magnetic ring |
| CN104455200A (en) * | 2014-12-23 | 2015-03-25 | 江苏理工学院 | Squeeze film damper with floating magnetic ring |
| CN105840657A (en) * | 2016-05-24 | 2016-08-10 | 上海交通大学 | Intelligent controllable bearing and method for controlling rotor vibration |
| CN208123331U (en) * | 2018-03-09 | 2018-11-20 | 沈阳航空航天大学 | A kind of parallel squeeze film damper |
-
2018
- 2018-12-17 CN CN201811541611.1A patent/CN109668717B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5080499A (en) * | 1990-03-23 | 1992-01-14 | General Motors Corporation | High temperature squeeze film damper |
| US5251985A (en) * | 1991-09-26 | 1993-10-12 | General Electric Company | Squeeze film damper seal |
| US5215384A (en) * | 1992-04-16 | 1993-06-01 | Dresser-Rand Company | Self-centering squeeze film damper bearing |
| CN2769611Y (en) * | 2004-11-04 | 2006-04-05 | 北京航空航天大学 | Adaptive squeezing oil film damper with metal rubber external ring |
| CN102425639A (en) * | 2011-11-30 | 2012-04-25 | 中国航空动力机械研究所 | Elastic supporting structure |
| CN104455143A (en) * | 2014-12-23 | 2015-03-25 | 江苏理工学院 | Magnetic damper with floating magnetic ring |
| CN104455200A (en) * | 2014-12-23 | 2015-03-25 | 江苏理工学院 | Squeeze film damper with floating magnetic ring |
| CN105840657A (en) * | 2016-05-24 | 2016-08-10 | 上海交通大学 | Intelligent controllable bearing and method for controlling rotor vibration |
| CN208123331U (en) * | 2018-03-09 | 2018-11-20 | 沈阳航空航天大学 | A kind of parallel squeeze film damper |
Non-Patent Citations (1)
| Title |
|---|
| 浮环式挤压油膜阻尼器的减振机理;周海仑 等;《航空动力学报》;20150410;第30卷(第4期);966-971 * |
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| CN109668717A (en) | 2019-04-23 |
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