CN103047281B - There is the Foil gas bearing of viscoelastic structure - Google Patents
There is the Foil gas bearing of viscoelastic structure Download PDFInfo
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- CN103047281B CN103047281B CN201210563696.XA CN201210563696A CN103047281B CN 103047281 B CN103047281 B CN 103047281B CN 201210563696 A CN201210563696 A CN 201210563696A CN 103047281 B CN103047281 B CN 103047281B
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Abstract
The invention discloses a kind of Foil gas bearing with viscoelastic structure, comprise bearing support and be fixed on several tile fragments on bearing support, tile fragment is coated with foil elements; The top layer of foil elements is the flat paillon foil of metal with smooth surface, and mesosphere is viscoelasticity paillon foil, and bottom is for bearing provides the tinsel of structural rigidity and structural damping.The axially mounting power of bottom paillon foil to rotor passes to top foil by viscoelasticity paillon foil, significantly can improve the stress concentration status at blister projection (or corrugation lobes) place, significantly improve top foil and bottom paillon foil operational reliability on the one hand, on the other hand, the bearing capacity of Foil gas bearing can also be improved.The Foil gas bearing with viscoelastic structure provided by the invention, viscoelasticity paillon foil effectively can absorb vibration and impact when rotor-bearing system runs, and suppresses the increase of rotor amplitude, thus greatly promotes the operation stability of high-speed rotating machine.
Description
Technical field
The invention belongs to hydrodynamic gas-lubricated bearing technical field, relate to a kind of Foil gas bearing with viscoelastic structure.
Background technique
Foil gas bearing has the advantages such as rotating speed is high, life-span length, good stability, and high-speed rotating machine (as turbo-expander, turbocompressor, turbocharger etc.) has a wide range of applications.Foil gas bearing structure conventional is at present ripple foil-type foil bearing, the requirement of its complex manufacturing technology, level of processing is high, fund input is huge, the occasion of adding bump foil bearing application is high-tech and war products, and its result of study and design criterion rarely have report.
For exploitation be adapted to domestic level of processing, structure simple, be easy to the Foil gas bearing that manufactures, Xi'an Communications University proposes a kind ofly to be had the kinetic pressure gas thrust bearing structure of axially support and has carried out correlation test research, this bearing structure as shown in Figure 1, result shows that this foil dynamical pressure gas lubricated thrust bearing structure is very simple, have higher stability, but compare with other foil dynamical pressure gas lubricated thrust bearings, bearing capacity is slightly inadequate.Particularly exceed certain limit when axially loading, the blister projection of bottom paillon foil is easy to a top foil bursting, mechanical deterioration is caused to top foil, or the blister projection of bottom paillon foil is flattened by top foil, thus having had a strong impact on the load-carrying properties of this hydrodynamic gas-lubricated bearing, the situation that foil elements destroys is as shown in Figure 2.
Summary of the invention
The problem that the present invention solves is to provide a kind of Foil gas bearing with viscoelastic structure, effectively can absorb vibration and impact when rotor-bearing system runs, suppress the increase of rotor amplitude, thus greatly promote the operation stability of high-speed rotating machine.
The present invention is achieved through the following technical solutions:
There is a Foil gas bearing for viscoelastic structure, comprise bearing support and be fixed on several tile fragments on bearing support, tile fragment is coated with foil elements;
The top layer of foil elements is the flat paillon foil of metal with smooth surface, and mesosphere is viscoelasticity paillon foil, and bottom is for bearing provides the tinsel of structural rigidity and structural damping.
Described viscoelasticity paillon foil is resistant to elevated temperatures viscoelastic rubber paillon foil.
The tinsel of described bottom is the tinsel with blister projection, or for having the tinsel of corrugated projection.
In described foil elements, the tinsel of bottom passes to the flat paillon foil of metal to the axially mounting power of rotor by viscoelasticity paillon foil, improves the stress concentration status of the prominence of tinsel.
In described foil elements, viscoelasticity paillon foil absorbs vibration and impact when rotor-bearing system runs, and suppresses the increase of rotor amplitude.
Described foil elements is also connected with tile fragment by locating stud.
Described tile fragment is fan-shaped tile fragment, and each tile fragment is provided with one group of foil elements.
Described fan-shaped tile fragment one end is provided with the pre-angle of wedge, and the pre-angle of wedge is 0.5 ~ 1.5 °.
Described fan-shaped tile fragment is installed on foil dynamical pressure gas lubricated thrust bearing.
Described when thrust button does high speed rotating relative to foil dynamical pressure gas lubricated thrust bearing, constantly there is gas to bring wedge gap into from entrance and produce dynamic pressure effect, make the gas pressure in wedge gap be greater than external pressure.
Compared with prior art, the present invention has following useful technique effect:
The Foil gas bearing with viscoelastic structure provided by the invention, by the design of viscoelasticity paillon foil in its foil elements, the axially mounting power of bottom paillon foil to rotor passes to top foil by viscoelasticity paillon foil, significantly can improve the stress concentration status at blister projection (or corrugation lobes) place, significantly improve top foil and bottom paillon foil operational reliability on the one hand, on the other hand, the bearing capacity of Foil gas bearing can also be improved.The blister projection solving bottom paillon foil is easy to a top foil bursting, causes mechanical deterioration to top foil, or the defect that the blister projection of bottom paillon foil is flattened by top foil.
In addition, the Foil gas bearing with viscoelastic structure provided by the invention, viscoelasticity paillon foil effectively can absorb vibration and impact when rotor-bearing system runs, suppress the increase of rotor amplitude, thus greatly promote the operation stability of high-speed rotating machine (as Miniature turbine expansion engine, miniature turbocompressor etc.).
When thrust button makes high speed rotating relative to thrust shaft, due to viscosity and the compressibility of gas, the wedge gap constantly having gas to bring right side into from left hand inlet port produces dynamic pressure effect, the gas pressure in gap is made to be greater than external pressure, axial force can be provided for rotor-bearing system on the one hand, also make foil elements produce the relative displacement of distortion and each foil elements on the other hand.The distortion of foil elements and displacement, can absorb unnecessary energy, suppresses the increase of rotor axial amplitude, thus can make the stability that whole rotor-bearing system keeps good.
Accompanying drawing explanation
Fig. 1 is the kinetic pressure gas thrust bearing with axially mounting of normal work, wherein scheme (a), scheme the plan view that (b) is respectively the flat paillon foil of top layer and bottom blister projection paillon foil, the sectional view that figure (c) is whole foil elements;
Fig. 2 is foil elements destroyed after bearing capacity exceedes certain limit; Wherein scheming (a) is by the flat paillon foil of the top layer of bursting, figure (b) bottom blister projection paillon foil for damaging by pressure;
Fig. 3 is the plan view of foil dynamical pressure gas lubricated thrust bearing three kinds of foil elements with viscoelastic structure;
Fig. 4 is the foil dynamical pressure gas lubricated thrust bearing erection drawing with viscoelastic structure;
Wherein, 1 is the flat paillon foil of metal, and 2 is viscoelastic rubber paillon foil, and 3 for having the tinsel of blister raised structures, and 4 is locating stud, and 5 is tile fragment, and 6 is thrust button.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
See Fig. 3, Fig. 4, a kind of Foil gas bearing with viscoelastic structure, is characterized in that, comprises bearing support and is fixed on several tile fragments 5 on bearing support, tile fragment 5 is coated with foil elements;
The top layer of foil elements is the flat paillon foil 1 of metal with smooth surface, and mesosphere is viscoelasticity paillon foil 2, and bottom is for bearing provides the tinsel 3 of structural rigidity and structural damping.
Concrete, the flat paillon foil 1 of metal of top layer provides bearing surface for bearing, the viscoelasticity paillon foil 2 in mesosphere is the resistant to elevated temperatures viscoelastic rubber paillon foil of energy, the tinsel 3 of bottom is for having the tinsel of blister projection bubbling, or for having the tinsel of corrugated projection bubbling, or the other forms of tinsel of structural rigidity and structural damping can be provided for bearing.。
In described foil elements, the tinsel of bottom passes to the flat paillon foil 1 of metal to the axially mounting power of rotor by viscoelasticity paillon foil 2, improves the stress concentration status of the prominence of tinsel.Viscoelasticity paillon foil 2 absorbs vibration and impact when rotor-bearing system runs, and suppresses the increase of rotor amplitude.
When making, first viscoelastic rubber paillon foil is fixed on the flat paillon foil 1 of top-level metallic, then the tinsel 3 of the flat paillon foil 1 of metal and bottom is together fixed on tile fragment 5 by locating stud 4, finally all tile fragments is assembled in the assembling work that bearing support can complete this bearing.
Concrete, tile fragment 5 is fan-shaped tile fragment, and each tile fragment is provided with one group of foil elements.Described fan-shaped tile fragment one end is provided with the pre-angle of wedge, and the pre-angle of wedge is 0.5 ~ 1.5 °.
Specifically be described with thrust bearing, the fan-shaped tile fragment with the paillon foil of viscoelastic structure assembled is installed on gas lubricated thrust bearing, and bearing support end face is provided with more than three fan-shaped tile fragments.Thrust button 6 makes high speed rotating relative to thrust shaft, due to viscosity and the compressibility of gas, the wedge gap constantly having gas to bring right side into from left hand inlet port produces dynamic pressure effect, the gas pressure in gap is made to be greater than external pressure, axial force can be provided for rotor-bearing system on the one hand, also make foil elements produce the relative displacement of distortion and each foil elements on the other hand.The distortion of foil elements and displacement, can absorb unnecessary energy, suppresses the increase of rotor axial amplitude, thus can make the stability that whole rotor-bearing system keeps good.
Claims (4)
1. have a Foil gas bearing for viscoelastic structure, it is characterized in that, comprise bearing support and be fixed on several tile fragments (5) on bearing support, (5) are coated with foil elements to tile fragment;
The top layer of foil elements is the flat paillon foil of metal (1) with smooth surface, and mesosphere is viscoelasticity paillon foil (2), and bottom is for bearing provides the tinsel (3) of structural rigidity and structural damping;
In described foil elements, the tinsel of bottom passes to the flat paillon foil of metal (1) to the axially mounting power of rotor by viscoelasticity paillon foil (2), improves the stress concentration status of the prominence of tinsel;
Described viscoelasticity paillon foil (2) is resistant to elevated temperatures viscoelastic rubber paillon foil;
The tinsel (3) of described bottom for having the tinsel of blister projection, or for having the tinsel of corrugated projection;
In described foil elements, viscoelasticity paillon foil (2) absorbs vibration and impact when rotor-bearing system runs, and suppresses the increase of rotor amplitude;
Described foil elements is also connected with tile fragment (5) by locating stud (4);
Described tile fragment (5) is fan-shaped tile fragment, and each tile fragment is provided with one group of foil elements.
2. have the Foil gas bearing of viscoelastic structure as claimed in claim 1, it is characterized in that, described fan-shaped tile fragment one end is provided with the pre-angle of wedge, and the pre-angle of wedge is 0.5 ~ 1.5 °.
3. have the Foil gas bearing of viscoelastic structure as claimed in claim 2, it is characterized in that, described fan-shaped tile fragment is installed on foil dynamical pressure gas lubricated thrust bearing.
4. there is the Foil gas bearing of viscoelastic structure as claimed in claim 3, it is characterized in that, when thrust button does high speed rotating relative to foil dynamical pressure gas lubricated thrust bearing, constantly there is gas to bring wedge gap into from entrance and produce dynamic pressure effect, make the gas pressure in wedge gap be greater than external pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210563696.XA CN103047281B (en) | 2012-12-22 | 2012-12-22 | There is the Foil gas bearing of viscoelastic structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210563696.XA CN103047281B (en) | 2012-12-22 | 2012-12-22 | There is the Foil gas bearing of viscoelastic structure |
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| Publication Number | Publication Date |
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| CN103047281A CN103047281A (en) | 2013-04-17 |
| CN103047281B true CN103047281B (en) | 2015-10-28 |
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| CN201210563696.XA Active CN103047281B (en) | 2012-12-22 | 2012-12-22 | There is the Foil gas bearing of viscoelastic structure |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267062B (en) * | 2013-05-16 | 2016-03-30 | 西安交通大学 | A kind of multilayer bubbling foil dynamical pressure gas lubricated thrust bearing |
| CN103867571B (en) * | 2014-01-21 | 2017-07-25 | 中南林业科技大学 | Kinetic pressure gas journal bearing with axially variable rigidity and viscoelastic structure |
| US9482274B2 (en) | 2014-11-25 | 2016-11-01 | General Electric Company | Compliant hybrid gas lubricated thrust bearing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4597677A (en) * | 1984-10-13 | 1986-07-01 | Taiho Kogyo Co. | Leaf-type foil thrust bearing |
| CN1563732A (en) * | 2004-03-18 | 2005-01-12 | 西安交通大学 | Mechanical bearing flat foil type thrust gas bearing of high speed surbine |
| CN101044332A (en) * | 2004-10-18 | 2007-09-26 | 韩国科学技术研究院 | Air foil bearing having a porous foil |
| CN201373019Y (en) * | 2009-01-14 | 2009-12-30 | 西安交通大学 | Dynamical pressure gas thrust bearing supported in axial direction |
| CN203082018U (en) * | 2012-12-22 | 2013-07-24 | 西安建筑科技大学 | Foil dynamical pressure gas bearing with viscoelastic structure |
-
2012
- 2012-12-22 CN CN201210563696.XA patent/CN103047281B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4597677A (en) * | 1984-10-13 | 1986-07-01 | Taiho Kogyo Co. | Leaf-type foil thrust bearing |
| CN1563732A (en) * | 2004-03-18 | 2005-01-12 | 西安交通大学 | Mechanical bearing flat foil type thrust gas bearing of high speed surbine |
| CN101044332A (en) * | 2004-10-18 | 2007-09-26 | 韩国科学技术研究院 | Air foil bearing having a porous foil |
| CN201373019Y (en) * | 2009-01-14 | 2009-12-30 | 西安交通大学 | Dynamical pressure gas thrust bearing supported in axial direction |
| CN203082018U (en) * | 2012-12-22 | 2013-07-24 | 西安建筑科技大学 | Foil dynamical pressure gas bearing with viscoelastic structure |
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| CN103047281A (en) | 2013-04-17 |
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