CN218347765U - Dynamic pressure gas radial bearing with elastic support sheet - Google Patents
Dynamic pressure gas radial bearing with elastic support sheet Download PDFInfo
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- CN218347765U CN218347765U CN202220755765.6U CN202220755765U CN218347765U CN 218347765 U CN218347765 U CN 218347765U CN 202220755765 U CN202220755765 U CN 202220755765U CN 218347765 U CN218347765 U CN 218347765U
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Abstract
The utility model discloses a dynamic pressure gas radial bearing with an elastic support sheet, which comprises a bearing sleeve, and a flat foil and an elastic support component which are arranged in the bearing sleeve; the elastic support assembly comprises an upper elastic foil and a lower elastic foil; the outer end surface of the upper elastic foil is provided with a plurality of convex supporting pieces along the axial direction and the circumferential direction, the inner end surface of the lower elastic foil is provided with a plurality of concave supporting pieces, and the convex supporting pieces and the concave supporting pieces are matched one by one to generate a supporting effect; the outer end face of the flat foil is attached to the inner end face of the upper elastic foil, the inner end face of the flat foil is attached to the rotating shaft, the flat foil and one end of the elastic support assembly are fixed in the bearing sleeve through a gasket, and the other end of the flat foil is free. The utility model provides a dynamic pressure gas radial bearing, the elastic supporting component is formed in one step by punching; the bearing capacity and the rigidity of the bearing are adjusted by adjusting the length and the arrangement mode of the supporting sheets and the included angle between the supporting sheets and the elastic foil, and the use requirements under different load conditions are met.
Description
Technical Field
The invention relates to the technical field of air bearings, in particular to a dynamic pressure gas radial bearing with an elastic support sheet.
Background
The bearing is an important part in the modern mechanical equipment and has very wide application. As the rotational speeds of rotating machinery increase, or the requirements of particular application environments, conventional bearings become bottlenecks that limit the development of these technologies. Compared with other bearings, the produced dynamic pressure air bearing has the characteristics of no need of lubrication, high working rotating speed, small mechanical loss, low maintenance cost and good stability, and is increasingly widely applied.
In the currently applied air bearing, an arch-shaped wave foil is mostly adopted as a flexible support of a flat foil, but the waveform and the height of the arch-shaped wave foil determine the performance of the bearing, the bearing capacity of the bearing is reduced by too small height, and the rigidity of the bearing is reduced by too large height; meanwhile, the consistency of the arched wave foil determines the stability and reliability of the air bearing, so the requirement on the manufacturing process of the arched wave foil is strict.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is: a hydrodynamic gas radial bearing with an elastic support sheet is provided instead of an arched corrugated foil.
In order to solve the problems, the technical scheme of the invention is as follows: a hydrodynamic gas radial bearing with an elastomeric backing sheet, said hydrodynamic gas radial bearing with an elastomeric backing sheet comprising: the bearing comprises a bearing sleeve, a flat foil and an elastic supporting assembly, wherein the flat foil and the elastic supporting assembly are arranged in the bearing sleeve; a plurality of convex supporting pieces are arranged on the outer end surface of the upper elastic foil piece along the axial direction and the circumferential direction, concave supporting pieces corresponding to the upper elastic foil piece are arranged on the inner end surface of the lower elastic foil piece, and the convex supporting pieces and the concave supporting pieces are matched one by one to generate a supporting effect; the outer end face of the flat foil is attached to the inner end face of the upper elastic foil, the inner end face of the flat foil is attached to the rotating shaft, the flat foil and one end of the elastic support assembly are fixed in the bearing sleeve through a gasket, and the other end of the flat foil is free.
According to the support structure of the dynamic pressure gas radial bearing, the common arch-shaped bump foil on the conventional dynamic pressure gas bearing is replaced by the elastic support structure, the support pieces on the upper elastic foil piece and the lower elastic foil piece play a role in elastic support and fixation, the influence of the manufacturing tolerance of the bump foil on the stability and the reliability of the bearing can be avoided, the damage caused by the arch crown collapse of the bump foil under heavy load or impact load of the bearing is avoided, and the bearing capacity and the impact resistance of the air bearing are obviously improved.
The arrangement directions of the convex support pieces on the upper elastic foil piece along the axial direction and the circumferential direction can be arranged in different directions, and the concave support pieces on the lower elastic foil piece are matched with the concave support pieces; the shape and the length of the support sheet on the upper elastic foil and the lower elastic foil can be changed according to different requirements.
The supports on the upper elastic foil and the lower elastic foil are arranged in an axial and circumferential uniform manner.
The length and the shape of the supporting pieces on the upper elastic foil piece and the lower elastic foil piece are changed, the included angle between the supporting pieces and the tangent line of the elastic foil pieces is changed, the supporting force of the supporting structure is increased or reduced, the load requirements of different dynamic pressure gas bearings can be met, and the bearing capacity and the impact resistance of the air bearing are obviously improved.
The outer end face of the flat foil is attached to the inner end face of the upper elastic foil, and the inner end face of the flat foil is attached to the rotating shaft.
In summary, after the technical scheme is adopted, the invention has the following beneficial effects:
the invention relates to a dynamic pressure gas radial bearing supporting structure, which adopts a dynamic pressure gas radial bearing supporting structure replacing an arched bump foil, utilizes convex and concave supports on an upper elastic foil and a lower elastic foil to generate a supporting effect, and abandons the arched bump foil, thereby avoiding the influence of the manufacturing tolerance of the bump foil on the stability and the reliability of a bearing, avoiding the damage of the bearing caused by the arch crown collapse of the bump foil under heavy load or impact load, and obviously improving the bearing capacity and the impact resistance of the bearing. The processing technology of the upper elastic foil and the outer foil in the elastic support group is simple, the splicing mode is adopted for matching, the maintenance mode of the bearing is simpler, and the service life of the bearing is also prolonged.
Drawings
FIG. 1 is a schematic view of a hydrodynamic gas radial bearing with an elastic support plate according to an embodiment of the present invention;
FIG. 2 is a schematic front view of a hydrodynamic gas radial bearing arrangement with a resilient support plate of FIG. 1;
FIG. 3 is a schematic top view of the hydrodynamic gas radial bearing configuration of FIG. 1 with a resilient support plate;
FIG. 4 is an enlarged schematic view at A in FIG. 2;
FIG. 5 is a schematic view of the flat foil configuration of FIG. 1;
FIG. 6 is a schematic view of the upper flexible foil of FIG. 1;
FIG. 7 is a schematic view of the lower flexible foil of FIG. 1;
FIG. 8 is a schematic structural diagram of an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of an embodiment of the present invention;
FIG. 10 is a schematic view of a hydrodynamic gas radial bearing with an elastomeric support plate in accordance with an embodiment of the present invention in combination with a shaft;
Detailed Description
The invention is further illustrated, but not limited, by the following examples and figures.
The structure of the hydrodynamic gas radial bearing II with the elastic support sheet is shown in figure 1 and comprises a bearing sleeve 6 and an elastic support assembly arranged in the bearing sleeve 6, wherein the elastic support assembly comprises an upper elastic foil 2 and a lower elastic foil 3; a plurality of convex supporting pieces 4 are arranged on the outer end surface of the upper elastic foil piece 2 along the axial direction and the circumferential direction, and a concave supporting piece 5 corresponding to the convex supporting pieces is arranged on the inner end surface of the lower elastic foil piece 3.
As shown in fig. 3, which is a top view of the elastic support assembly, the lower elastic foil 3 includes a support sheet 5, a plurality of support sheets 5 are disposed on the lower elastic foil 3, the support sheets 5 are arranged in an axially and circumferentially uniform manner, and the support sheets 5 may be formed by laser cutting or stamping, etc., wherein the support sheets 5 may be in a "concave" shape as shown in the figure, or may be in other shapes that cooperate with the support sheets 4 on the upper elastic foil 2 to generate a support effect, and the shapes of the support sheets are not limited herein.
As shown in fig. 4, in the assembled and working state of the bearing, the support sheet 4 and the support sheet 5 on the lower elastic foil 3 of the upper elastic foil 2 cooperate with each other to generate a support function; the outer end face of the flat foil 1 is attached to the inner end face of the upper elastic foil 2, and the inner end face of the flat foil is attached to the rotating shaft.
As shown in fig. 6 and 7, the arrangement directions of the convex support pieces 4 on the upper elastic foil 2 along the axial direction and the circumferential direction can be arranged in different directions, the concave support pieces 5 on the lower elastic foil 3 are matched with the convex support pieces, and the shapes and lengths of the support pieces 4 and 5 on the lower elastic foil 3 of the upper elastic foil 2 can be changed according to different requirements, so that the use requirements under different load conditions are met;
in fig. 6, eight rows of support sheets 4 are illustrated, each row having nine support sheets 4, and obviously, the number illustrated is merely illustrative and not limited thereto.
The invention has the advantages of simple structure, easy processing and assembly. The structures on the upper elastic foil 2 and the lower elastic foil 3 play roles of elastic supporting, fixing and axial positioning, so that the influence of the manufacturing tolerance of the bump foil on the stability and the reliability of the bearing is avoided, the damage caused by the bump foil vault collapse of the bearing under heavy load or impact load is avoided, and the bearing capacity and the impact resistance of the air bearing are obviously improved. The upper elastic foil 2 and the lower elastic foil 3 in the elastic supporting assembly are simple in processing technology, the supporting pieces 4 and 5 are matched in a splicing mode, the maintenance mode of the bearing is simpler, the upper elastic foil 2 and the lower elastic foil 3 can be conveniently replaced under the condition that other parts of the bearing are not damaged, the bearing is easier to maintain, and the service life of the bearing is prolonged.
The foregoing is illustrative of the preferred embodiments of the present invention, and details which have not been given in detail are known in the art, and are not to be construed as limitations on the scope of the invention except as set forth in the following claims.
Claims (4)
1. A dynamic pressure gas radial bearing with an elastic supporting sheet comprises a bearing sleeve, and a flat foil and an elastic supporting component which are arranged in the bearing sleeve; the elastic support assembly comprises an upper elastic foil and a lower elastic foil; the method is characterized in that: a plurality of support pieces are arranged on the outer end face of the upper elastic foil and the inner end face of the lower elastic foil; the supporting pieces on the outer end face of the upper elastic foil are in a convex shape, the supporting pieces on the inner end face of the lower elastic foil are in a convex shape, and the convex supporting pieces and the concave supporting pieces are matched one by one.
2. A hydrodynamic gas radial bearing with a resilient support plate according to claim 1, wherein: the outer end face of the flat foil is attached to the inner end face of the upper elastic foil, the inner end face of the flat foil is attached to the rotating shaft, one end of the flat foil and one end of the elastic supporting assembly are fixed in the bearing sleeve through a gasket, and the other end of the flat foil and the other end of the elastic supporting assembly are free.
3. A hydrodynamic gas radial bearing with a flexible support plate in accordance with claim 1 wherein: the support pieces are uniformly arranged along the axial direction and the circumferential direction.
4. A hydrodynamic gas radial bearing with a resilient support plate according to claim 1, wherein: the included angle between the support sheet and the elastic foil sheet is 5 。 -30 。 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220755765.6U CN218347765U (en) | 2022-03-31 | 2022-03-31 | Dynamic pressure gas radial bearing with elastic support sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220755765.6U CN218347765U (en) | 2022-03-31 | 2022-03-31 | Dynamic pressure gas radial bearing with elastic support sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218347765U true CN218347765U (en) | 2023-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220755765.6U Active CN218347765U (en) | 2022-03-31 | 2022-03-31 | Dynamic pressure gas radial bearing with elastic support sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218347765U (en) |
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2022
- 2022-03-31 CN CN202220755765.6U patent/CN218347765U/en active Active
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