CN112855748A - Double-sided bubbling foil dynamic pressure gas thrust bearing - Google Patents
Double-sided bubbling foil dynamic pressure gas thrust bearing Download PDFInfo
- Publication number
- CN112855748A CN112855748A CN202110329795.0A CN202110329795A CN112855748A CN 112855748 A CN112855748 A CN 112855748A CN 202110329795 A CN202110329795 A CN 202110329795A CN 112855748 A CN112855748 A CN 112855748A
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- Prior art keywords
- foil
- sided
- double
- bubbling
- face
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- 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.)
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Links
- 239000011888 foil Substances 0.000 title claims abstract description 85
- 230000005587 bubbling Effects 0.000 title claims abstract description 67
- 238000003466 welding Methods 0.000 claims description 7
- 241000197194 Bulla Species 0.000 claims 8
- 208000002352 blister Diseases 0.000 claims 8
- 238000013016 damping Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/042—Sliding-contact bearings for exclusively rotary movement for axial load only with flexible leaves to create hydrodynamic wedge, e.g. axial foil bearings
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/08—Sliding-contact bearings for exclusively rotary movement for axial load only for supporting the end face of a shaft or other member, e.g. footstep bearings
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/02—Sliding-contact bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention discloses a double-sided bubbling foil dynamic pressure gas thrust bearing, which comprises a bearing seat, a double-sided bubbling foil and a flat foil; the upper end face of the bearing seat is provided with a double-sided bubbling foil, and the upper end face of the double-sided bubbling foil is provided with a flat foil; the upper end face and the lower end face of the double-faced bubbling foil are provided with a plurality of circles of bubbles along the radial direction or the circumferential direction, the bubbling convex fixed point of the upper end face is attached to the lower end face of the flat foil, and the bubbling convex fixed point of the lower end face is attached to the upper end face of the bearing seat. The invention has the advantages that the structure is simple, the flat foil and the double-sided bubbling foil are convenient to manufacture, and the flat foil and the double-sided bubbling foil can be formed by one-step processing; the upper end surface and the lower end surface of the double-sided bubbling foil are provided with a plurality of circles of bubbling protrusions along the radial direction or the circumferential direction, so that the double-sided bubbling foil bearing has better rigidity and damping characteristics, and can meet the requirements of different loads. Meanwhile, the double-sided bubbling foil can generate effective elastic predeformation in the assembling process, and the bearing capacity and the stability of the bearing are further improved.
Description
Technical Field
The invention belongs to the field of dynamic pressure gas bearings in high-speed rotating machinery, and particularly relates to a double-sided bubbling foil dynamic pressure gas thrust bearing.
Background
With the development of the technology in the fields of aerospace, energy power and the like, higher and higher requirements are also put forward on the lubricating technology in order to keep the stability and reliability of high-speed running machinery. When the rotating speed of the rotor is very high or the relative movement speed is very high, such as an aircraft turbine engine or a microminiature gas turbine, the oil temperature is rapidly increased due to friction caused by high-speed movement, so that an effective lubricating film cannot be formed, and the oil bearing cannot meet the requirement; when the working environment needs higher purity, for example, turbo machinery used for helium liquefying devices, space refrigerators and the like, if oil bearings are adopted, the working environment is polluted. In this case, other types of bearings are required for lubrication. The magnetic bearing has a complex structure and high cost, so that the popularization of the magnetic bearing is limited, and the gas bearing is a better choice.
The bubbling dynamic pressure gas thrust bearing has the advantages of strong shock absorption capability, high stability and the like of a common foil dynamic pressure gas bearing. However, the traditional single-sided bubbling foil bearing has high bubbling support rigidity, almost no deformation allowance is left for a bubbling fulcrum, excessive friction is easily caused on the surface of the bearing in the starting, stopping and running processes, and the friction damage of the bearing and a rotor is caused; although the multilayer bubbling foil bearing combined by the single-sided bubbling foils can adapt to different loads to a certain extent, the bearing has great difficulty in assembly and processing of foils, and the application of the bearing in high-speed rotating machinery is limited.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a double-sided bubbling foil dynamic pressure gas thrust bearing which has better rigidity and damping characteristics, can adapt to different loads and has good processing and assembling performance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-sided bubbling foil dynamic pressure gas thrust bearing comprises a bearing seat, a double-sided bubbling foil and a flat foil, and is characterized in that the double-sided bubbling foil is arranged on the upper end face of the bearing seat, and the flat foil is arranged on the upper end face of the double-sided bubbling foil. The upper end face and the lower end face of the double-faced bubbling foil are provided with a plurality of bubbles along the radial direction or the circumferential direction, the bubbling convex fixed point of the upper end face is attached to the lower end face of the flat foil, and the bubbling convex fixed point of the lower end face is attached to the upper end face of the bearing seat.
The bubbling protrusions comprise one or more of hollow hemispherical protrusions, hollow spherical crown protrusions, hollow circular truncated cone protrusions and hollow elliptic cylinder protrusions, the bubbles on the same end face are same in shape, and the bubbles on the upper end face and the lower end face can be same in shape or different in shape.
The arrangement mode of the bubble protrusions on the double-sided bubbling foil is uniform in the radial direction or the circumferential direction.
The double-sided bubbling foil and the flat foil are in fan-shaped structures and are respectively four (or six or eight).
The bearing seat, the double-sided bubbling foil and the flat foil are welded together by welding rods, and the welding position is 1-3mm away from the two side edges of the fan shape.
Compared with the prior art, the invention has the following beneficial technical effects:
the double-sided bubbling foil dynamic pressure gas thrust bearing provided by the invention adopts the bubbling foil with bubbling protrusion fixed points on both sides as the elastic element, so that the rigidity distribution and the damping characteristic of the bearing are improved. Compared with a single-side bubbling foil bearing, the double-side bubbling foil bearing has better elasticity and rigidity because the upper end surface and the lower end surface are provided with the bubbling protrusions; compared with a multi-layer bubbling foil bearing combined by single-side bubbling foils, the double-side bubbling foil is formed by one-step processing and has better assembling performance.
Drawings
FIG. 1 is a schematic diagram of a thrust bearing structure of the double-sided bubbling foil hydrodynamic gas.
Fig. 2 is an assembled pre-deformed view of the double-sided bubbling foil dynamic pressure gas thrust bearing of the invention.
Fig. 3 is a structural diagram and a side view of a double-sided bubbling foil thrust bearing of the double-sided bubbling foil dynamical pressure gas of the present invention.
FIG. 4 is a flat foil structure diagram of the double-sided bubbling foil hydrodynamic gas thrust bearing according to the present invention.
In the figure, 1 is a flat foil, 2 is a double-sided bubbling foil, 3 is a bearing seat, 4 is a bubble, and 5 is a welding position.
Detailed Description
The invention is described in further detail below with reference to the figures and examples.
The structure of the double-sided bubbling foil dynamic pressure gas thrust bearing is shown in figure 1 and comprises a bearing seat 3, a double-sided bubbling foil 2 and a flat foil 1; the upper end face of the bearing seat 3 is provided with a double-sided bubbling foil 2, and the upper end face of the double-sided bubbling foil 2 is provided with a flat foil 1. The upper end face and the lower end face of the double-faced bubbling foil are provided with a plurality of circles of bubbles 4 along the radial direction or the circumferential direction, the bubbling convex fixed points on the upper end face are attached to the lower end face of the flat foil, and the bubbling convex fixed points on the lower end face are attached to the upper end face of the bearing seat.
As shown in fig. 3, the arrangement of the blister protrusions on the double-sided blister foil 2 is uniform in the radial direction or the circumferential direction. The bubbling protrusions comprise one or more of hollow hemispherical protrusions, hollow spherical crown protrusions, hollow circular truncated cone protrusions and hollow elliptic cylinder protrusions, the bubbles on the same end face are same in shape, and the bubbles on the upper end face and the lower end face can be same or different in shape.
As shown in fig. 3 and 4, the double-sided bubbling foil 2 and the flat foil 1 are of fan-shaped structures, each of which is four (or six or eight) pieces, and are all formed by one-step processing; the bearing seat 3, the double-sided bubbling foil 2 and the flat foil 1 are welded together by welding rods, and the welding position 5 is a position 1-3mm away from two side edges of the fan shape.
The invention has the advantages of simple structure, easy processing and assembly. The upper end surface and the lower end surface of the double-sided bubbling foil are provided with a plurality of circles of bubbling protrusions along the radial direction or the circumferential direction, so that the double-sided bubbling foil bearing has better rigidity and damping characteristics, and can meet the requirements of different loads. Meanwhile, the double-sided bubbling foil can generate effective elastic predeformation in the assembling process, and the bearing capacity and the stability of the bearing are further improved.
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a gaseous footstep bearing of two-sided tympanic bulla foil dynamic pressure, is including bearing frame (3), two-sided tympanic bulla foil (2) and plain foil (1), its characterized in that bearing frame (3) up end is provided with two-sided tympanic bulla foil (2), and two-sided tympanic bulla foil (2) up end is provided with plain foil (1), the terminal surface is provided with many rings tympanic bulla (4) along radial or circumference about the two-sided tympanic bulla foil, and the protruding fixed point of tympanic bulla of up end is laminated with terminal surface under the plain foil, and the protruding fixed point of tympanic bulla of lower.
2. A double-sided bubbled foil hydrodynamic gas thrust bearing according to claim 1 wherein: the bubbling protrusions comprise one or more of hollow hemispherical protrusions, hollow spherical crown protrusions, hollow circular truncated cone protrusions and hollow elliptic cylinder protrusions, the bubbles on the same end face are same in shape, and the bubbles on the upper end face and the lower end face can be same in shape or different in shape.
3. A double-sided bubbled foil hydrodynamic gas thrust bearing according to claim 1 wherein: the arrangement mode of the bubble protrusions on the double-sided bubbling foil (2) is uniform in the radial direction or the circumferential direction.
4. A double-sided bubbled foil hydrodynamic gas thrust bearing according to claim 1 wherein: the double-sided bubbling foil (2) and the flat foil (1) are of fan-shaped structures and are four (or six or eight) in number respectively.
5. A double-sided bubbled foil hydrodynamic gas thrust bearing according to claim 1 wherein: the bearing seat (3), the double-sided bubbling foil (2) and the plain foil (1) are welded together through welding rods, and the welding position (5) is 1-3mm away from the two side edges of the fan shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110329795.0A CN112855748A (en) | 2021-03-29 | 2021-03-29 | Double-sided bubbling foil dynamic pressure gas thrust bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110329795.0A CN112855748A (en) | 2021-03-29 | 2021-03-29 | Double-sided bubbling foil dynamic pressure gas thrust bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112855748A true CN112855748A (en) | 2021-05-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110329795.0A Pending CN112855748A (en) | 2021-03-29 | 2021-03-29 | Double-sided bubbling foil dynamic pressure gas thrust bearing |
Country Status (1)
| Country | Link |
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| CN (1) | CN112855748A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102132052A (en) * | 2008-08-25 | 2011-07-20 | 拓博有限公司 | Thrust foil bearing |
| JP2018013188A (en) * | 2016-07-21 | 2018-01-25 | Ntn株式会社 | Foil bearing |
| WO2018047840A1 (en) * | 2016-09-07 | 2018-03-15 | Ntn株式会社 | Foil bearing |
| JP2018040414A (en) * | 2016-09-07 | 2018-03-15 | Ntn株式会社 | Foil bearing |
| JP2020159453A (en) * | 2019-03-26 | 2020-10-01 | Ntn株式会社 | Foil bearing, foil bearing unit and turbomachine |
| CN212389648U (en) * | 2020-06-03 | 2021-01-22 | 石家庄金士顿轴承科技有限公司 | Axial thrust foil dynamic pressure air bearing |
| CN215487193U (en) * | 2021-03-29 | 2022-01-11 | 西北农林科技大学 | Double-sided bubbling foil dynamic pressure gas thrust bearing |
-
2021
- 2021-03-29 CN CN202110329795.0A patent/CN112855748A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102132052A (en) * | 2008-08-25 | 2011-07-20 | 拓博有限公司 | Thrust foil bearing |
| JP2018013188A (en) * | 2016-07-21 | 2018-01-25 | Ntn株式会社 | Foil bearing |
| WO2018047840A1 (en) * | 2016-09-07 | 2018-03-15 | Ntn株式会社 | Foil bearing |
| JP2018040414A (en) * | 2016-09-07 | 2018-03-15 | Ntn株式会社 | Foil bearing |
| JP2020159453A (en) * | 2019-03-26 | 2020-10-01 | Ntn株式会社 | Foil bearing, foil bearing unit and turbomachine |
| CN212389648U (en) * | 2020-06-03 | 2021-01-22 | 石家庄金士顿轴承科技有限公司 | Axial thrust foil dynamic pressure air bearing |
| CN215487193U (en) * | 2021-03-29 | 2022-01-11 | 西北农林科技大学 | Double-sided bubbling foil dynamic pressure gas thrust bearing |
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