CN202674142U - Extrusion oil film damper - Google Patents
Extrusion oil film damper Download PDFInfo
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- CN202674142U CN202674142U CN 201220277427 CN201220277427U CN202674142U CN 202674142 U CN202674142 U CN 202674142U CN 201220277427 CN201220277427 CN 201220277427 CN 201220277427 U CN201220277427 U CN 201220277427U CN 202674142 U CN202674142 U CN 202674142U
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Abstract
The utility model discloses an extrusion oil film damper which comprises an oil inlet groove, oil inlet holes, oil film grains and oil storage holes. The oil inlet groove is arranged on an outer ring of the extrusion oil film damper, and the oil inlet holes are arranged in the oil inlet groove and communicated with the oil film grains to supply oil to the oil film grains. The oil film grains are slits which are hollowed out on the periphery of a bearing of the extrusion oil film damper and include outer grains I, inner grains III and a middle grain group positioned between the outer grains I and the inner grains III, each middle grain group comprises a plurality of middle grains II which are in nested combination and not in mutual communication, and each two adjacent middle grains are mutually communicated through one inner grain III. The oil storage holes are axial through holes and distributed in the oil film grains. The extrusion oil film damper is simple in structure, convenient to process, low in cost, simple in mounting and applicable to damping of 2-0-0 type rotor supporting structures and has wide application prospect in miniature rotary power machinery.
Description
Technical field
The utility model belongs to miniature rotating power machinery antivibration area, relates to a kind of squeeze film damper structure, specifically, refers to a kind of squeeze film damper that is used in miniature gas turbine or the jet engine of microminiature turbine.
Background technique
Micro Turbine Jet Engine and micro fuel engine are the rotary power machinery of state key exploitation over past ten years, have been widely used and wide market prospects in aviation and distributed energy power plant field.Its main feature is that volume is little, specific power is high, cost is low, less energy consumption, is fit to the demand for development of future society sustainable development and green energy resource.But Miniature rotatory force mechanical separator speed is very high, and the vibration problem of the rotor-support-foundation system that brings thus under at a high speed is the key factor that affects whole aircraft reliability.
At present, engineering circles is effectively control rotor oscillation, has proposed multiple damping technology, and these damping technologies can be divided into two kinds from vibration attenuation mechanism: a kind of is dissipates vibration energy vibration damping, such as squeeze film damper, metal-rubber damper, dry friction damping technology etc.; A kind of is that extraneous energy supply suppresses vibration, such as magnetic bearing etc.Based on factors such as cost and engineering realizabilitys, dissipates vibration can develop comparatively maturation by damping technology, and engineering is used more.Wherein, squeeze film damper has obtained to apply in the large aerospace engine art in conjunction with the elastic support damping technology.And for miniature rotating power machinery, domestic overall design is lacked experience, and still is in the exploratory stage, especially for some key components and parts or technology point, more needs emphasis to improve and raising.Therefore, for different rotor supporting structures, propose vibration reducing measure with strong points, successful, standardization, modularization that microminiature rotary power machinery is designed have positive promoting effect.Squeeze film damper described in the utility model proposes for 2-0-0 formula supporting structure in the micro rotary dynamic power machine, has the strong characteristics of engineering adaptability, and present domestic Micro Turbine Jet Engine and micro fuel engine project grinding had reference function.
Summary of the invention
The purpose of this utility model is to lack for domestic microminiature rotating power machinery design experiences, and the incomplete characteristics of rotor-support-foundation system Vibration Absorption Designing provide a kind of squeeze film damper damping technology scheme.Described squeeze film damper proposes for 2-0-0 formula rotor supports mode, and squeeze film damper described in the utility model is installed between left end shaft bearing outer-ring and housing, to reach vibration damping, to keep the purpose of rotor high-speed stability.
The utility model is that the technological scheme that its technical problem of solution is taked is:
A kind of squeeze film damper, integral body is the endless metal coil structures, comprises oil-feed tank, oil inlet hole, oil film lines, oil storage hole, it is characterized in that:
The longitudinal section of described squeeze film damper is T shape, and cross section is annular;
Described oil-feed tank processing is the banded groove of the complete cycle of arranging in the circumferential direction of the circle in the outer ring of described squeeze film damper;
Described oil inlet hole is machined in the described oil-feed tank, and for along the equally distributed radial direction oil hole of described squeeze film damper outer ring circumferencial direction, described oil inlet hole is communicated with described oil film lines and to described oil film lines fuel feeding;
Described oil film lines is the slit that makes progress in supporting week that hollow out is machined in described squeeze film damper, arrangement order according to radial direction, described oil film lines comprises a plurality of outer lines I of arranging near the outer ring successively, near a plurality of interior lines III of inner ring layout and the middle lines group between described outer lines I and interior lines III, each arranges at least respectively a described centre lines group with its UNICOM the two ends of each described outer lines I, the lines group comprised the each other disconnected middle lines II of a plurality of nested combinations in the middle of each was described, the lines group is passed through each other UNICOM of a described interior lines III in the middle of adjacent two, the length of described outer lines I is greater than the length of described interior lines III, described outer lines I, middle lines group and interior lines III all evenly distribute along the circumferencial direction of described squeeze film damper;
Described oil storage hole is axial hole, is distributed in the described oil film lines.Described squeeze film damper is applicable to the 2-0-0 formula rotor supporting structure in miniature gas turbine or the jet engine of microminiature turbine.
Preferably, described oil inlet hole is communicated with described outer lines I; In the middle of each in lines group, is communicated with middle lines II of close interior lines III and described interior lines III UNICOM with described outer lines I near lines II in the middle of of outer lines I.
Preferably, each arranges an oil storage hole with its UNICOM at least the two ends of described outer lines I, arranges at least an oil storage hole with its UNICOM in the described interior lines III.
Preferably, and arrange at least an oil storage hole with its UNICOM in the middle lines II that described outer lines I is communicated with, and arrange at least an oil storage hole with its UNICOM in the short grain road II of described interior lines III UNICOM.
Preferably, the quantity of described oil inlet hole and described interior lines III equates, is even number, and the angle between the symmetrical line that passes through described squeeze film damper center of the center line of each oil inlet hole and adjacent interior lines III equates.The quantity of oil inlet hole and interior lines III can increase by even number according to the vibration damping needs, can be 4,6 or 8 etc.; For example: when 4 oil inlet holes and 4 interior lines III, angle is 45 degree between the symmetrical line of each oil inlet hole center line and interior lines III; When 6 oil inlet holes and 6 interior lines III, angle is 30 degree between the symmetrical line of each oil inlet hole center line and interior lines III, by that analogy.
Preferably, the lines group comprises the each other disconnected middle lines II of a plurality of nested combinations in the middle of each, and lines II was spline curve shape in the middle of each was described.
Preferably, described middle lines II is S shape, C shape, anti-C shape, many " C " or other shape.
Preferably, the curved section structure of turning up is all adopted at the two end part of described outer lines I and/or described interior lines III, and curve shape is fillet, spline curve or other shape, to increase lines length.
Preferably, the slit width of described oil film lines is 0.1-0.5mm.
Preferably, squeeze film damper described in the utility model is applicable to the 2-0-0 formula rotor supporting structure in miniature gas turbine or the jet engine of microminiature turbine.Described 2-0-0 formula rotor supporting structure is cantilever rotor, and center of gravity is in the right-hand member bearing outside, and namely compressor impeller and turbine are in the right-hand member bearing outside." 2-0-0 " is the professional call of describing rotor bearing form, structure, is general in the industry.Concrete meaning is: the short-term symbolic representation gas compressor on the left side; The short-term symbolic representation turbine on the right; The concrete number of three numeral bearings; Numeral " 2 " is positioned at the gas compressor left end, and expression gas compressor left end has two bearing supportings; First " 0 " does not have bearing between expression gas compressor and the turbine between gas compressor and turbine; Second " 0 " is positioned at the turbine right-hand member, and expression turbine right-hand member does not have bearing.Numeral is changed, and meaning is the same, represents that there are several bearings corresponding position.
Further, described squeeze film damper is installed between the left end bearing and housing of described 2-0-0 formula rotor supporting structure, and described squeeze film damper outer ring and housing are interference fit, and described squeeze film damper inner ring and bearing are interference fit.Because the left end bearing has been installed squeeze film damper, support stiffness reduces, the vibration meeting that produces during working rotor is passed to the left end bearing take right-hand member bearing (left end bearing support stiffness is larger relatively) as fulcrum and obtains amplifying (distance of the support interval between the two bearings much larger than rotor cantilever end center of gravity to the right-hand member bearing), simultaneously, the strain energy of rotating shaft section can reduce between right-hand member bearing and the rotor c.g., is beneficial to the fatigue life that guarantees this shaft part.At this moment, vibrational energy need to be dissipated rapidly.
The below is introduced the principle of squeeze film damper of the present utility model: by circumferentially processing the hollow out lines at squeeze film damper of bearing, make it to have elasticity; By the lubricant oil that in structure, lines, circulates, utilize the structure effect of damming, and the viscosity of oil, damping is provided, reach the effect of attenuation vibration.Elasticity should have certain rigidity, makes again complete cycle Stiffness Distribution gap little, in order to keep certain isotropy.Therefore, lines will arrange along complete cycle, but can not connect each other, otherwise just so that the support accessory fracture.The length of lines will have certain requirement, and length is longer, and it is just more that oil distributes therein, and the damping effect that produces in the vibration is just larger, and effectiveness in vibration suppression is just better.But lines is long, will make support accessory rigidity excessively low, and elasticity is excessive, loses the function of supporting rotor.Therefore, suitable value be arranged.
The outer lines of outmost turns, in the circumferential direction of the circle processing disconnects in the position of vertical and level.For increasing lines length, improve damping, gap adopts the curved section structure of turning up, and curve shape can be fillet or spline curve.According to action principle, also can adopt other shape to increase lines length, connect each other but can not make between the lines.For making structural rigidity have certain isotropy, the inner ring in the position that the outer lines of outmost turns disconnects, arrange corresponding in lines.
For making supporting structure have simultaneously enough, suitable radial rigidity and circumferential rigidity, lines group in the middle of adding between the interior lines of the outer lines of outmost turns and inner ring.This centre lines group and structure function realize by the each other disconnected short grain road mode of nested combination.
Oil-feed tank is a groove, is communicated with oil duct on the housing, can store a certain amount of oil, prevents that the oil inlet hole peripheral region from producing the moment oil starvation; The oil consumption that also can keep certain charge oil pressure simultaneously and reduce in the circulation fuel feeding process is lost.The closed area that oil inlet hole is formed by housing and groove (housing and squeeze film damper outer ring are interference fit) fuel feeding, and guiding oil flows into the oil film lines near the squeeze film damper outer ring.Oil is along circumferentially being full of outer ring oil film lines, and end is let out to both sides along radial inflow and is full of inner ring oil film lines vertically, and the mode of letting out with end vertically at last flows out squeeze film damper and enters the oil return circulation.Rotor oscillation drives the squeeze film damping and produces radial displacement, drives oil and flows in the oil film lines, and the viscosity of oil self, runner flow resistance, oil film lines terminal (zone, the sidewalk for visually impaired people) effect of damming produce damping effect, the dissipates vibration energy jointly.Oil storage hole is distributed near in the oil film lines of squeeze film damper inner ring, can store a certain amount of oil and as the pressure buffer district, owing to instantaneous dynamic pressure in the oil film lines surpasses charge oil pressure, cause the instantaneous oil return of oil inlet hole when preventing from vibrating, failure of oil feed, the damping function disappearance.Simultaneously, owing to being distributed with the oil film lines along squeeze film damper complete cycle direction, so that its radial rigidity reduces greatly, with the active set of elastic support and damping vibration attenuation, strengthened engineering adaptability.
Compare with prior art, squeeze film damper of the present utility model has following remarkable advantage:
(1) squeeze film damper that provides of the utility model have advantages of simple in structure, cost is low, easy for installation.
(2) squeeze film damper of this model utility is with strong points, effectiveness in vibration suppression obvious, be fit to engineering uses.
Description of drawings
Fig. 1 is equipped with the 2-0-0 formula support rotor system architecture schematic diagram of squeeze film damper;
Fig. 2 is the axle survey views such as squeeze film damper of the present utility model;
Fig. 3 is squeeze film damper front view of the present utility model;
Fig. 4 is squeeze film damper 1/4th periodic structure detailed drawing of the present utility model;
Fig. 5 (a), Fig. 5 (b), Fig. 5 (c), Fig. 5 (d), Fig. 5 (e) are the various possible structural type schematic diagram of short grain road group.
Fig. 6 is squeeze film damper of the present utility model damper dynamic response figure in one embodiment.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.
The utility model provides a kind of squeeze film damper, and described squeeze film damper is installed on the 2-0-0 support rotor structure, as shown in Figure 1.Shown in Fig. 2,3, squeeze film damper 1 of the present utility model is T-shaped cross section endless metal coil structures, be installed in during use between left end bearing 601 and the housing 8, squeeze film damper 1 outer ring and housing 8 are interference fit, and squeeze film damper 1 inner ring and bearing 601 are interference fit; The CONSTRUCTED SPECIFICATION of squeeze film damper 1 comprises oil-feed tank 2, oil inlet hole 3, oil film lines 4, oil storage hole 5.
Described oil-feed tank 2 is for processing in squeeze film damper 1 outer ring the banded groove of the complete cycle of arranging in the circumferential direction of the circle.Be under the condition of interference fit in squeeze film damper 1 outer ring and housing 8, oil-feed tank 2 can store a certain amount of oil with the seal space that housing 8 forms, and prevents that the pressure surge that the oil inlet hole peripheral region brings owing to rotor oscillation from producing the moment oil starvation; The oil consumption that also can keep certain charge oil pressure simultaneously and reduce in the circulation fuel feeding process is lost.
Described oil inlet hole 3 is machined in the oil-feed tank 2, and for along the equally distributed radial direction oil hole of squeeze film damper 1 outer ring circumferencial direction, oil inlet hole 3 is communicated with outer lines I 401 and outside lines I 401 fuel feeding.Oil inlet hole 3 and interior lines III quantity equate, evenly distribute in the circumferential direction of the circle, and angle equates between the symmetrical line of each oil inlet hole center line and interior lines III, and the quantity of oil inlet hole and interior lines III can increase by even number, can be 4,6 or 8 etc.In the present embodiment, the number of oil inlet hole 3 is 4, and the angle between each oil inlet hole is 90 degree; The number of interior lines III 402 also is 4, and the angle in each between the lines III 402 is 90 degree; Angle between the symmetrical line of each oil inlet hole center line and interior lines III 402 is 45 degree.
Such as Fig. 3, shown in 4, oil film lines 4 is machined in the slit that makes progress in supporting week of squeeze film damper 1 for hollow out, arrangement order according to radial direction, oil film lines 4 comprises a plurality of outer lines I 401 of arranging near the outer ring successively, the middle lines group that a plurality of interior lines III 402 of arranging near inner ring reaches between outer lines I 401 and interior lines III 402, each arranges at least respectively a middle lines group with its UNICOM the two ends of each outer lines I 401, the lines group comprises the middle lines II 403 of each other disconnected S type of two nested combinations in the middle of each, the lines group is passed through each other UNICOM of an interior lines III 402 in the middle of adjacent two, the length of outer lines I 401 is greater than the length of interior lines III 402, outer lines I 401, middle lines group 403 and interior lines III 402 all evenly distribute along the circumferencial direction of squeeze film damper 1.
The gap size of oil film lines 4 is 0.15mm.Outer lines I 401 is near squeeze film damper 1 outer ring, and interior lines III 402 is near squeeze film damper 1 inner ring; Outer lines I 401 is communicated with oil inlet hole 3, and in the outer lines I with oil storage hole 5; Interior lines III 402 is communicated with oil storage hole 5.In order to increase lines length, improve damping, the curved section structure of turning up can be adopted in the two end part of outer lines I 401 and/or interior lines III 402, curve shape is fillet, spline curve or other shape.
The quantity of oil inlet hole 3 and interior lines III 402 is according to the vibration damping needs, can be 4,6 or 8 etc.; For example: when 4 oil inlet holes and 4 interior lines III 402, angle is 45 degree between each oil inlet hole center line and the interior lines III symmetrical line; When 6 oil inlet holes and 6 interior lines III, angle is 30 degree between each oil inlet hole center line and the interior lines III symmetrical line; By that analogy.
Described oil storage hole 5 is axial hole, and diameter is 2mm, is distributed in the middle of the oil film lines 4, and the regularity of distribution as shown in Figures 3 and 4.Oil storage hole 5 is distributed in the oil film lines 4, can store a certain amount of oil and as the pressure buffer district, owing to instantaneous dynamic pressure in the oil film lines 4 surpasses charge oil pressure, cause oil inlet hole 3 instantaneous oil returns when preventing from vibrating, failure of oil feed, damping function disappearance.
In the use, can determine according to vibration level the quantity of oil inlet hole 3 and oil film lines 4.The quantity of the two is larger, and the radial rigidity of squeeze film damper 1 is less; The geometry processing dimension of oil film lines 4 and oil storage hole 5 is less, and the damping vibration attenuation effect is more obvious.
The two S type shapes of middle lines II 403 except providing among Fig. 3,4 can also have other various shape, shown in Fig. 5 (a), Fig. 5 (b), Fig. 5 (c), Fig. 5 (d), Fig. 5 (e).Such as the spline curve that can also be C shape, anti-C shape, many " C " or other shape.
Fig. 6 has shown that when the slit width of oil film lines 4 was 0.3mm, the dynamic response of damper, abscissa were the time, and unit " second ", y coordinate are the vibration displacement value, and unit is " millimeter ".Figure indicating level of vibration satisfies requirement of engineering.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of the present utility model.
Claims (9)
1. squeeze film damper, integral body is the endless metal coil structures, comprises oil-feed tank, oil inlet hole, oil film lines, oil storage hole, it is characterized in that:
The longitudinal section of described squeeze film damper is T shape, and cross section is annular;
Described oil-feed tank processing is the banded groove of the complete cycle of arranging in the circumferential direction of the circle in the outer ring of described squeeze film damper;
Described oil inlet hole is machined in the described oil-feed tank, and for along the equally distributed radial direction oil hole of described squeeze film damper outer ring circumferencial direction, described oil inlet hole is communicated with described oil film lines and to described oil film lines fuel feeding;
Described oil film lines is the slit that makes progress in supporting week that hollow out is machined in described squeeze film damper, arrangement order according to radial direction, described oil film lines comprises a plurality of outer lines I of arranging near the outer ring successively, near a plurality of interior lines III of inner ring layout and the middle lines group between described outer lines I and interior lines III, each arranges at least respectively a described centre lines group with its UNICOM the two ends of each described outer lines I, the lines group comprised the each other disconnected middle lines II of a plurality of nested combinations in the middle of each was described, the lines group is passed through each other UNICOM of a described interior lines III in the middle of adjacent two, the length of described outer lines I is greater than the length of described interior lines III, described outer lines I, middle lines group and interior lines III all evenly distribute along the circumferencial direction of described squeeze film damper;
Described oil storage hole is axial hole, is distributed in the described oil film lines;
Described squeeze film damper is applicable to the 2-0-0 formula rotor supporting structure in miniature gas turbine or the jet engine of microminiature turbine.
2. squeeze film damper according to claim 1, it is characterized in that: the described oil inlet hole of outer lines is communicated with described outer lines I; In the middle of each in lines group, is communicated with middle lines II of close interior lines III and described interior lines III UNICOM with described outer lines I near lines II in the middle of of outer lines I.
3. squeeze film damper according to claim 1 and 2 is characterized in that: each arranges an oil storage hole with its UNICOM at least the two ends of described outer lines I, arranges at least an oil storage hole with its UNICOM in the described interior lines III.
4. squeeze film damper according to claim 2, it is characterized in that: with arrange at least an oil storage hole with its UNICOM in the middle lines II that described outer lines I is communicated with, and arrange at least an oil storage hole with its UNICOM in the short grain road II of described interior lines III UNICOM.
5. squeeze film damper according to claim 1 and 2, it is characterized in that: the quantity of described oil inlet hole and described interior lines III equates, be even number, the angle between the symmetrical line that passes through described squeeze film damper center of the center line of each oil inlet hole and adjacent interior lines III equates.
6. squeeze film damper according to claim 1 and 2 is characterized in that: lines group comprises lines II in the middle of a plurality of nested combinations disconnected each other in the middle of each, and lines II was spline curve shape in the middle of each was described.
7. squeeze film damper according to claim 6 is characterized in that: the lines II is S shape, C shape, anti-C shape or many " C " shape in the middle of described.
8. squeeze film damper according to claim 1 and 2, it is characterized in that: the curved section structure of turning up is all adopted at the two end part of described outer lines I and/or described interior lines III, and curve shape is fillet or spline curve, to increase lines length.
9. squeeze film damper according to claim 1 and 2, it is characterized in that: described squeeze film damper is installed between the left end bearing and housing of described 2-0-0 formula rotor supporting structure, its outer ring and housing interference fit, its inner ring and bearing outer ring interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220277427 CN202674142U (en) | 2012-06-12 | 2012-06-12 | Extrusion oil film damper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220277427 CN202674142U (en) | 2012-06-12 | 2012-06-12 | Extrusion oil film damper |
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| CN202674142U true CN202674142U (en) | 2013-01-16 |
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| CN 201220277427 Withdrawn - After Issue CN202674142U (en) | 2012-06-12 | 2012-06-12 | Extrusion oil film damper |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705427A (en) * | 2012-06-12 | 2012-10-03 | 中国科学院工程热物理研究所 | Squeeze film damper |
| CN107013341A (en) * | 2016-01-28 | 2017-08-04 | 通用电气公司 | Gearbox planetary squeeze-film damping device |
| CN111692211A (en) * | 2020-06-22 | 2020-09-22 | 奚志娴 | Magnetic suspension bearing with squeeze film damper |
| CN111911577A (en) * | 2019-05-07 | 2020-11-10 | 现代自动车株式会社 | Shock absorber for vehicle |
| CN113833750A (en) * | 2021-09-29 | 2021-12-24 | 武汉理工大学 | Intelligent vibration damping bearing lubricated by water through extruding magnetic oil film and vibration damping method |
-
2012
- 2012-06-12 CN CN 201220277427 patent/CN202674142U/en not_active Withdrawn - After Issue
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102705427A (en) * | 2012-06-12 | 2012-10-03 | 中国科学院工程热物理研究所 | Squeeze film damper |
| CN102705427B (en) * | 2012-06-12 | 2013-12-04 | 中国科学院工程热物理研究所 | Squeeze film damper |
| CN107013341A (en) * | 2016-01-28 | 2017-08-04 | 通用电气公司 | Gearbox planetary squeeze-film damping device |
| US10113633B2 (en) | 2016-01-28 | 2018-10-30 | General Electric Company | Gearbox planet squeeze film damper |
| CN111911577A (en) * | 2019-05-07 | 2020-11-10 | 现代自动车株式会社 | Shock absorber for vehicle |
| CN111692211A (en) * | 2020-06-22 | 2020-09-22 | 奚志娴 | Magnetic suspension bearing with squeeze film damper |
| CN113404776A (en) * | 2020-06-22 | 2021-09-17 | 奚志娴 | Magnetic suspension bearing with squeeze film damper |
| CN113404776B (en) * | 2020-06-22 | 2022-11-18 | 苏州喜全软件科技有限公司 | Magnetic suspension bearing with squeeze film damper |
| CN113833750A (en) * | 2021-09-29 | 2021-12-24 | 武汉理工大学 | Intelligent vibration damping bearing lubricated by water through extruding magnetic oil film and vibration damping method |
| CN113833750B (en) * | 2021-09-29 | 2023-08-15 | 武汉理工大学 | Intelligent vibration reduction bearing capable of realizing water lubrication of extrusion magnetic oil film and vibration reduction method |
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