CN210637372U - Novel radial air foil bearing - Google Patents
Novel radial air foil bearing Download PDFInfo
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- CN210637372U CN210637372U CN201920500570.5U CN201920500570U CN210637372U CN 210637372 U CN210637372 U CN 210637372U CN 201920500570 U CN201920500570 U CN 201920500570U CN 210637372 U CN210637372 U CN 210637372U
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Abstract
The utility model relates to a novel radial air foil bearing, which comprises a bearing sleeve, a wave foil top foil integrated structure and a cylindrical pin; the bearing sleeve is provided with a pin hole for inserting the cylindrical pin along the axial direction; the wave foil top foil integrated structure is integrally pressed and formed, and three parts of a wave foil, a transition arc and a top foil are sequentially formed; rolling the wave foil and the top foil into a cylinder, wherein the top foil is arranged at the inner part and the wave foil is arranged at the outer part; the transition arc is embedded into the pin hole, and the bump foil is tightly attached to the inner wall of the bearing sleeve; the cylindrical pin is embedded into a pin-shaped hole formed by the transition arc of the integrated bump foil top foil to play a role in fixing. The utility model solves the problems of poor manufacturing consistency, lower installation precision, higher installation requirement and the like of the existing radial air foil bearing; the wave foil top foil integrated structure does not need welding, so that the processing steps are simplified, and the manufacturing precision is improved; the wave foil top foil integrated structure is manufactured by integral pressing forming, and the consistency is high; the installation is convenient, the structure is simplified, and the batch production is facilitated.
Description
Technical Field
The utility model relates to an air dynamic pressure bearing technical field, more specifically say, relate to a novel radial air foil bearing.
Background
The air foil dynamic pressure bearing is a dynamic pressure air bearing with a good flexible surface and composed of one or more layers of corrugated wave foils and a top foil, and the bearing achieves the supporting and lubricating effects by extruding a certain viscous gas to form a pressure lubricating gas film through the relative motion of a shaft and the surface of the bearing. As shown in fig. 1, when two surfaces moving relative to each other have a wedge-shaped space, the surfaces moving relative to each other continuously drive gas into the wedge-shaped groove, so that a dynamic pressure gas film with a certain pressure is formed in the wedge-shaped groove, and when the pressure of the gas film is large enough to support a load, the floating friction force of the rotating shaft disappears.
The air bearing has the advantages of small friction loss, almost no friction at extremely high rotating speed, good high-temperature stability, small vibration, no need of lubricating oil and the like, is widely applied to machines such as an air cycle machine, an air compressor, a micro gas turbine and the like, and has very wide application prospect in the fields of low-temperature technology, high-speed turbine, space technology and the like. The large-scale application of the foil bearing is limited by high requirements on manufacturing and mounting precision, difficulty in controlling manufacturing consistency and the like.
The conventional radial air foil bearing is of a welded structure, as shown in fig. 2, and comprises a bearing sleeve, a wave foil and a top foil, wherein the wave foil and the top foil are welded on the inner wall of the bearing sleeve, and the consistency is poor; the slot-in type structure is shown in fig. 3, the inner wall of the bearing sleeve is provided with a slot, and the bump foil top foil is inserted into the slot for fixing, so that the requirement on installation is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel radial air foil bearing solves the manufacturing uniformity that current radial air foil bearing exists poor, the installation accuracy is lower to and the higher scheduling problem of installation requirement.
The utility model adopts the following technical proposal:
a novel radial air foil bearing comprises a bearing sleeve 1, a wave foil top foil integrated structure 3 and a cylindrical pin 2; the bearing sleeve 1 is provided with a pin hole for inserting the cylindrical pin 2 along the axial direction; the wave foil top foil integrated structure 3 is integrally pressed and formed to sequentially form three parts of a wave foil, a transition arc and a top foil; rolling the wave foil and the top foil into a cylinder, wherein the top foil is arranged at the inner part and the wave foil is arranged at the outer part; the transition arc is embedded into the pin hole, and the bump foil is tightly attached to the inner wall of the bearing sleeve; the cylindrical pin is embedded into a pin-shaped hole formed by the transition arc of the integrated bump foil top foil to play a role in fixing.
Further, the top foil portion is laid out once inside the wave foil top foil integrated structure 3, and the wave foil portion is laid out once outside the wave foil top foil integrated structure 3.
Furthermore, the pin hole is inward from one end surface of the bearing sleeve 1 and is a blind hole, and the opening part of the pin hole is in a major arc shape.
Furthermore, the transition circular arc is also in a major arc shape.
Furthermore, the wave foils and the wave foils extend in different directions from the transition circular arc.
Furthermore, the wave foil and the wave foil extend in the same direction from the transition circular arc.
Further, the wave foil top foil integrated structure 3 is divided into two or more sections, each section comprises three parts of complete wave foil, transition circular arc and top foil, and a multi-petal shape is formed; the bearing sleeve 1 is provided with a corresponding number of pin holes; the number of cylindrical pins 2 is also a corresponding number.
Furthermore, the wave foils and the wave foils extend from the transition circular arc to the opposite direction.
The manufacturing method of the novel radial air foil bearing comprises the following steps:
s1, a pin hole is formed in the bearing sleeve so as to fix the integrated bump foil top foil conveniently;
s2, integrally pressing and forming the bump foil and top foil integrated structure 3 by foils to form three parts of bump foil, transition circular arcs and top foil;
s3, rolling the wave foil and the top foil part of the wave foil and top foil integrated structure 3 into a cylinder, wherein the top foil is arranged at the inner side and the outer side, embedding the transition arc into the pin hole of the bearing sleeve, and enabling the wave foil to be tightly attached to the inner wall of the bearing sleeve;
s4, embedding the cylindrical pin into a pin-shaped hole formed by the integrated bump foil top foil transition arc to play a fixing role, and obtaining the complete radial air foil bearing.
The beneficial effects of the utility model reside in that:
1) the problems that an existing radial air foil bearing is poor in manufacturing consistency, low in installation accuracy, high in installation requirement and the like are solved.
2) The wave foil top foil integrated structure does not need welding, so that the processing steps are simplified, and the manufacturing precision is improved;
3) the wave foil top foil integrated structure is manufactured by integral pressing forming, and the consistency is high;
4) the installation is convenient, the structure is simplified, and the batch production is facilitated.
Drawings
FIG. 1 is a schematic view of the dynamic pressure principle of an air foil bearing;
FIG. 2 is a schematic view of a conventional radial bearing;
FIG. 3 is a schematic view of a slot-in bearing structure;
FIG. 4 is a schematic view of an integrated bump foil top foil bearing structure;
FIG. 5 is a schematic view of a pin hole structure of an integrated bump foil top foil bearing sleeve;
FIG. 6 is a schematic view of an unfolded integral bump foil top foil structure;
FIG. 7 is a front view of an integral bump foil top foil structure in a bearing;
FIG. 8 is a perspective view of an integral bump foil top foil structure in a bearing;
FIG. 9 is a schematic view of an integrated co-rotating bump foil top foil bearing structure;
fig. 10 is a schematic view of a three-lobe integral wave foil top foil bearing structure.
In the figure, 1, a bearing sleeve, 2, a cylindrical pin, 3, a wave foil top foil integrated structure, 1a pin hole, 3a wave foil part, 3b, a transition circular arc part and 3c, a top foil part are arranged; 4. bearing sleeve in fig. 2, 5, weld in fig. 2, 6, bump foil in fig. 2, 7, top foil in fig. 2, 8, bearing sleeve in fig. 3, 9, socket in fig. 3, 10, bump foil in fig. 3, 11, top foil in fig. 3.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Comparative example one:
referring to fig. 2, the wave foil and the top foil are separated, the top foil 7 is on the inner side, the wave foil 6 is on the outer side, and the wave foil is welded and fixed on the inner side of the bearing sleeve 4 through a welding point 5. The consistency of this form is difficult to guarantee.
Comparative example two:
referring to fig. 3, fig. 3 shows an air foil bearing of a slot-in type structure, in which a slot 9 is formed on an inner wall of a bearing housing 8, and a split type bump foil 10 and a top foil 11 are inserted therein to be fixed, which is a structure that requires high installation requirements.
The first embodiment is as follows:
referring to fig. 4, a novel radial air foil bearing comprises a bearing sleeve 1, a wave foil top foil integrated structure 3 and a cylindrical pin 2; the bearing sleeve 1 is provided with a pin hole for inserting the cylindrical pin 2 along the axial direction; the wave foil top foil integrated structure 3 is integrally pressed and formed to sequentially form three parts of a wave foil, a transition arc and a top foil; rolling the wave foil and the top foil into a cylinder, wherein the top foil is arranged at the inner part and the wave foil is arranged at the outer part; the transition arc is embedded into the pin hole, and the bump foil is tightly attached to the inner wall of the bearing sleeve; the cylindrical pin is embedded into a pin-shaped hole formed by the transition arc of the integrated bump foil top foil to play a role in fixing.
With continued reference to fig. 4, the top foil portion runs once inside the wave foil top foil integrated structure 3 and the wave foil portion runs once outside the wave foil top foil integrated structure 3.
Referring to fig. 5, the pin hole is a blind hole inward from one end surface of the bearing sleeve 1, and an opening portion of the pin hole is in a major arc shape.
Referring to fig. 6, the transition arc is also in the shape of a major arc.
Referring to fig. 4, the wave foils and the wave foils extend from the transition arc to the opposite direction.
The specific manufacturing method comprises the following steps: s1, a pin hole is formed in the bearing sleeve so as to fix the integrated bump foil top foil conveniently; s2, integrally pressing and forming the bump foil and top foil integrated structure 3 by foils to form three parts of bump foil, transition circular arcs and top foil; s3, rolling the wave foil and the top foil part of the wave foil and top foil integrated structure 3 into a cylinder, wherein the top foil is arranged at the inner side and the outer side, embedding the transition arc into the pin hole of the bearing sleeve, and enabling the wave foil to be tightly attached to the inner wall of the bearing sleeve; s4, embedding the cylindrical pin into a pin-shaped hole formed by the integrated bump foil top foil transition arc to play a fixing role, and obtaining the complete radial air foil bearing.
Example two:
the difference from the first embodiment is that: referring to fig. 9, the wave foils and the wave foils extend from the transition arc to the same direction.
Example three:
the difference from the first embodiment is that: referring to fig. 10, the wave foil and top foil integrated structure 3 is divided into three sections, each section includes three parts, namely a complete wave foil, a transition arc and a top foil, and a multi-petal shape is formed; the bearing sleeve is provided with a corresponding number of pin holes; the number of cylindrical pins is also a corresponding number.
In this embodiment, the bump foils and the bump foils extend in opposite directions from the transition arc.
The number of lobes 3 and the form of the wave foil top foil integrated structure can be designed according to specific situations. The above examples are only preferred embodiments of the present invention, and all such changes or modifications are intended to be included within the scope of the present invention as claimed.
Claims (8)
1. A novel radial air foil bearing characterized by:
the bearing comprises a bearing sleeve (1), a wave foil top foil integrated structure (3) and a cylindrical pin (2);
the bearing sleeve (1) is provided with a pin hole for the cylindrical pin (2) to insert into along the axial direction;
the wave foil top foil integrated structure (3) is integrally pressed and formed to sequentially form three parts of a wave foil, a transition arc and a top foil; rolling the wave foil and the top foil into a cylinder, wherein the top foil is arranged at the inner part and the wave foil is arranged at the outer part; the transition arc is embedded into the pin hole, and the bump foil is tightly attached to the inner wall of the bearing sleeve;
the cylindrical pin is embedded into a pin-shaped hole formed by the transition arc of the integrated bump foil top foil to play a role in fixing.
2. The novel radial air foil bearing of claim 1, wherein: the top foil part is arranged on the inner side of the wave foil top foil integrated structure (3) for one circle, and the wave foil part is arranged on the outer side of the wave foil top foil integrated structure (3) for one circle.
3. The novel radial air foil bearing of claim 1, wherein: the pin hole is inward from one end face of the bearing sleeve (1) and is a blind hole, and the opening part of the pin hole is in a major arc shape.
4. The novel radial air foil bearing of claim 3, wherein: the transition arc is also in the shape of a major arc.
5. The novel radial air foil bearing of claim 1 or 2, wherein: the wave foils extend from the transition circular arc to the opposite direction.
6. The novel radial air foil bearing of claim 1 or 2, wherein: the wave foil and the wave foil extend in the same direction from the transition circular arc.
7. The novel radial air foil bearing of claim 1, wherein: the wave foil top foil integrated structure (3) is divided into two sections or multiple sections, each section comprises three parts of complete wave foil, transition circular arcs and top foil, and a multi-petal shape is formed; the bearing sleeve (1) is provided with a corresponding number of pin holes; the number of the cylindrical pins (2) is also the corresponding number.
8. The novel radial air foil bearing of claim 7, wherein: the wave foils extend from the transition circular arc to the opposite direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920500570.5U CN210637372U (en) | 2019-04-12 | 2019-04-12 | Novel radial air foil bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920500570.5U CN210637372U (en) | 2019-04-12 | 2019-04-12 | Novel radial air foil bearing |
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| Publication Number | Publication Date |
|---|---|
| CN210637372U true CN210637372U (en) | 2020-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920500570.5U Active CN210637372U (en) | 2019-04-12 | 2019-04-12 | Novel radial air foil bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973517A (en) * | 2019-04-12 | 2019-07-05 | 上海优社动力科技有限公司 | A kind of novel radial air foil bearing and preparation method thereof |
| CN111963572A (en) * | 2020-08-14 | 2020-11-20 | 北京稳力科技有限公司 | Gas compressor, motor and radial gas dynamic pressure bearing of foil |
-
2019
- 2019-04-12 CN CN201920500570.5U patent/CN210637372U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973517A (en) * | 2019-04-12 | 2019-07-05 | 上海优社动力科技有限公司 | A kind of novel radial air foil bearing and preparation method thereof |
| CN111963572A (en) * | 2020-08-14 | 2020-11-20 | 北京稳力科技有限公司 | Gas compressor, motor and radial gas dynamic pressure bearing of foil |
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