CN114508547A - Static pressure gas radial bearing with adjustable throttling hole parameters and centrifugal fan - Google Patents
Static pressure gas radial bearing with adjustable throttling hole parameters and centrifugal fan Download PDFInfo
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- CN114508547A CN114508547A CN202210205533.8A CN202210205533A CN114508547A CN 114508547 A CN114508547 A CN 114508547A CN 202210205533 A CN202210205533 A CN 202210205533A CN 114508547 A CN114508547 A CN 114508547A
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- bearing
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- screw
- radial bearing
- orifice
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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
- F16C32/00—Bearings not otherwise provided for
- F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
- F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
- F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
- F16C32/0622—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings via nozzles, restrictors
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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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a static pressure gas radial bearing with adjustable throttling hole parameters and a centrifugal fan, and relates to the field of high-speed rotating machinery. An air supply hole is formed in the outer cylindrical surface of the bearing, and a threaded hole is formed below the air supply hole; the orifice at the upper end of the threaded hole is communicated with the air supply hole, and the lower end of the threaded hole is positioned on the bearing working surface; the screw is arranged in the threaded hole, the screw is provided with a throttling hole, and the screw is divided into multiple specifications according to different aperture of the throttling hole. The static pressure gas radial bearing provided by the invention has a simple structure and is convenient to manufacture, and the throttling effect of a throttling hole and a bearing gap is changed by replacing different screws, so that the rigidity and the bearing capacity of the static pressure gas radial bearing are adjusted; the screw is easy to disassemble and assemble, and the throttling hole parameters can be adjusted conveniently according to actual requirements, so that the same bearing can be used under different working media and different load conditions, and the application range of the bearing is widened.
Description
Technical Field
The invention relates to the technical field of high-speed rotating machinery, in particular to a static pressure gas radial bearing with adjustable throttling hole parameters and a centrifugal fan.
Background
The static pressure gas radial bearing utilizes working gas as a lubricant, has the advantages of no oil, small friction loss, long service life, high motion precision and the like, and is widely applied to the technical fields of high-speed rotating machinery such as centrifugal fans, centrifugal compressors, turbo expanders and the like, data center cooling and the like. The bearing rigidity is the main performance index of the static pressure gas radial bearing and is also the key for ensuring the bearing precision and the precision retentivity. The small-hole throttling static pressure gas radial bearing adopts the throttling hole with a small hole diameter and the small bearing gap, so that the gas generates a strong throttling effect in the process of passing through the throttling hole and the bearing gap, and the bearing is ensured to obtain high rigidity.
At present, the traditional static pressure gas radial bearing mostly adopts a mode of directly punching holes on the outer cylindrical surface of the bearing to arrange throttling holes, the punching mode has high operation difficulty, and a drill bit is easy to break during drilling; in addition, the centers of the rotor and the bearing are eccentric due to the load action, and the rigidity of the bearing cannot be optimal due to the fact that throttling holes with the same diameter are formed in a direct punching mode in order to reduce machining difficulty; when the load changes or the lubricating medium changes, the bearing needs to be designed and manufactured again, the cost is increased, and the application range of the static pressure gas radial bearing with the same main shaft diameter is limited.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a static pressure gas radial bearing with adjustable orifice parameters, which can optimize the bearing capacity under different load and lubricating medium conditions and has good machining and assembly performance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a static pressure gas radial bearing with adjustable throttling hole parameters is characterized in that a gas supply hole is formed in the outer cylindrical surface of the bearing, and a threaded hole is formed below the gas supply hole; the orifice at the upper end of the threaded hole is communicated with the air supply hole, and the lower end of the threaded hole is positioned on the bearing working surface; the threaded hole is internally provided with a screw, and the screw is provided with a throttling hole.
The screw is provided with an orifice, the orifice is coaxial with the external thread on the screw, and the aperture of the orifice is 0.1-0.8 mm.
The threaded holes are distributed in one row, two rows or four rows along the axial direction of the bearing, each row of threaded holes are uniformly distributed along the circumferential direction of the bearing seat, and the number of each row is 4-24.
The aperture of the throttling holes in the same row of screws can be the same, and the screws with different apertures can be used for arrangement and arrangement according to requirements.
The screw comprises one or more of a socket head cap female end holding screw, a straight-line female end holding screw and a cross female end holding screw, and the screw and the threaded hole are sealed by adopting thread fastening glue or a raw adhesive tape.
The air supply hole is coaxial with the threaded hole, and the diameter of the air supply hole is larger than or equal to that of the threaded hole.
The depth of the equalizing groove and whether the equalizing groove is arranged or not are changed by changing the depth of the screw screwed into the threaded hole.
Another aspect of the present invention also provides a centrifugal fan, including: the rotor penetrates through the bearing cover plate and the static pressure gas radial bearing with adjustable throttling hole parameters, one end of the rotor is connected with the impeller, and the static pressure gas radial bearing with adjustable throttling hole parameters is arranged on the bearing cover plate.
Compared with the prior art, the invention has the following beneficial technical effects:
the static pressure gas radial bearing with the adjustable throttling hole parameters, provided by the invention, has a simple structure and is convenient to manufacture, and the aperture and arrangement mode of the throttling hole are changed by replacing the perforated screws with different specifications, so that the throttling effect of the gap between the throttling hole and the bearing is adjusted, and the rigidity and the bearing capacity of the static pressure gas radial bearing are further improved; when the static pressure gas radial bearing is applied to a centrifugal fan, the screws are easy to disassemble and assemble, so that the aperture and the arrangement mode of the throttling holes can be adjusted conveniently according to load distribution, the same bearing can be used under different working media and different load conditions, and the application range of the bearing is widened.
Drawings
Fig. 1 is a transverse cross-sectional view (one) of the bearing of the present invention.
Fig. 2 is a schematic structural diagram (one) of the bearing of the present invention.
Fig. 3 is a schematic structural view of the screw of the present invention.
Fig. 4 is a cross-sectional view of a screw of the present invention.
Fig. 5 is a schematic structural view (ii) of the bearing of the present invention.
Fig. 6 is a transverse sectional view (ii) of the bearing of the present invention.
Fig. 7 is a longitudinal sectional view of the bearing of the present invention.
FIG. 8 is a schematic view of a hydrostatic gas radial bearing provided by an embodiment of the present invention applied to a centrifugal fan;
in the figure, 1 is an air supply hole, 2 is a threaded hole, 3 is a screw, 4 is an orifice, 5 is an impeller, 6 is a bearing cover plate, 7 is a rotor, and 8 is a static pressure gas radial bearing with adjustable orifice parameters.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.
Example 1:
the structure of the static pressure gas radial bearing with adjustable throttle orifice parameters is shown in figure 1, a gas supply hole 1 is formed in the outer cylindrical surface of the bearing, and a threaded hole 2 is formed below the gas supply hole 1; the orifice at the upper end of the threaded hole 2 is communicated with the air supply hole 1, and the lower end of the threaded hole is positioned on the bearing working surface; a screw 3 is arranged in the threaded hole 2, and an orifice 4 is formed in the screw 3.
As shown in fig. 1, the air supply hole 1 is coaxial with the threaded hole 2, and the diameter of the air supply hole 1 is larger than or equal to that of the threaded hole 2; the orifice 4 is coaxial with the external thread on the screw.
As shown in fig. 1, the screw 3 and the threaded hole 2 are sealed by using a thread fastening glue or a raw adhesive tape.
As shown in FIG. 1, when the screw 3 is engaged with the threaded hole 2, a gauge having the same diameter as the inner cylindrical surface of the bearing is inserted into the bearing, and then the screw 3 is screwed into the threaded hole 2. When the pressure equalizing groove 2.1 is not needed to be arranged, the bottom end of the screw 3 contacts the outer cylindrical surface of the go gauge; when the pressure equalizing groove 2.1 needs to be arranged, the bottom end of the screw 3 keeps a distance from the outer cylindrical surface of the go gauge. In the present embodiment, a form in which no pressure equalizing groove is provided is shown.
As shown in fig. 2, the threaded holes are distributed in one row, two rows or four rows along the axial direction of the bearing, each row of threaded holes is uniformly distributed along the circumferential direction of the bearing, and the number of each row is 4-24.
As shown in figures 1 and 2, each row of threaded holes (3) are uniformly distributed along the circumferential direction of the bearing, the hole diameters of the throttling holes (5) of the screws (4) can be the same, and the threaded holes can be arranged and arranged according to actual requirements, so that the rigidity and the bearing capacity of the bearing along the circumferential direction can achieve the best effect.
As shown in fig. 3, the screw 3 includes one or more of a socket head cap end set screw, a straight socket end set screw, and a cross socket end set screw.
As shown in fig. 4, the throttle hole 1 formed on the screw 3 is a through hole, the screw 3 is divided into a plurality of specifications according to the different hole diameters d of the throttle hole 4, and the throttle hole depth h can be changed by forming the throttle hole 5 on the screw 4 with different lengths according to requirements; the aperture d of the throttling hole is 0.1-0.8mm, and the depth h of the throttling hole is 3-30 mm.
As shown in fig. 2, 3 and 4, in order to change the arrangement of the orifices 4 on the bearing, some of the screws 4 may not be opened.
In this embodiment, the screw hole is two rows along bearing axial distribution, and the number of each row of screw hole is 8, and what the screw adopted is the hexagon socket head cap end holding screw of the same specification.
Example 2:
as shown in fig. 5 and 6, the present embodiment has the same structure as that of embodiment 1, except that in the present embodiment, the threaded holes are distributed in four rows along the axial direction of the bearing, the number of the threaded holes in each row is 16, and if the number of the orifices is to be changed, screws with orifices and screws without holes are used in each row of the threaded holes at intervals; the distance between the first row of threaded holes 21 and the end face of the bearing seat is L2, the distance between the second row of threaded holes 22 and the end face of the bearing seat is L1, if the distance between the end faces is L1, the first row of threaded holes 21 and the fourth row of threaded holes 24 use screws without holes, and the other two rows of screws with holes; if a face distance of L2 is desired, the second and third rows of holes 22, 23 use screws that are not apertured and the other two rows use screws that are apertured.
Example 3:
as shown in fig. 7, the present embodiment has the same structure as that of embodiment 1, except that the orifices (4) formed in the screws (3) distributed in the circumferential direction in the same row have different hole diameters.
Example 4:
as shown in fig. 8, the rotor 7 passes through the bearing cover plate 6 and the static pressure gas radial bearing 8 with adjustable orifice parameters provided by the present invention and is connected with the impeller 5 at one end, and the static pressure gas radial bearing 8 with adjustable orifice parameters is mounted on the bearing cover plate 6 and is connected with the bearing cover plate 6 through screws.
The invention has the advantages of simple structure, easy processing and assembly. The throttling holes with different apertures are formed in the screw, the screw is matched with the threaded hole in the outer cylindrical surface of the bearing, the throttling effect is adjusted by changing the parameters of the throttling holes, and further the rigidity and the bearing capacity of the static pressure gas radial bearing are adjusted.
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 (8)
1. The static pressure gas radial bearing with adjustable throttling hole parameters is characterized in that a gas supply hole (1) is formed in the outer cylindrical surface of the bearing, and a threaded hole (2) is formed below the gas supply hole (1); the orifice at the upper end of the threaded hole (2) is communicated with the air supply hole (1), and the lower end of the threaded hole is positioned on the bearing working surface; and a screw (3) is arranged in the threaded hole (2), and a throttling hole (4) is formed in the screw (3).
2. An orifice parameter adjustable hydrostatic gas radial bearing as claimed in claim 1, wherein: an orifice (4) is formed in the screw (3), the orifice (4) and the external thread on the screw (3) are coaxial, and the aperture of the orifice (4) is 0.1-0.8 mm.
3. An orifice parameter adjustable hydrostatic gas radial bearing as claimed in claim 1, wherein: the threaded holes (2) are distributed in one row or multiple rows along the axial direction of the bearing, each row of threaded holes are uniformly distributed along the circumferential direction of the bearing seat, and the number of each row is 4-24.
4. An orifice parameter adjustable hydrostatic gas radial bearing as claimed in claim 1, wherein: the aperture of the throttling holes (4) in the same row of screws (3) can be the same, and screws with different apertures can be used for arrangement and arrangement according to requirements; the aperture of the throttling holes (4) in the screws (3) can be the same or different among different rows.
5. An orifice parameter adjustable hydrostatic gas radial bearing as claimed in claim 1, wherein: the screw (3) comprises an inner hexagonal concave end holding screw, a straight concave end holding screw and a cross concave end holding screw.
6. An orifice parameter adjustable hydrostatic gas radial bearing as claimed in claim 1, wherein: the air supply hole (1) and the threaded hole (2) are coaxial, and the diameter of the air supply hole (1) is larger than or equal to that of the threaded hole (2).
7. An orifice parameter adjustable hydrostatic gas radial bearing as claimed in claim 1, wherein: the depth of the equalizing groove (2.1) and whether the equalizing groove is arranged or not are changed by changing the depth of the screw (3) screwed into the threaded hole (2).
8. A centrifugal fan, comprising: -an impeller (5), -a bearing cover plate (6), -a rotor (7), said rotor (7) passing through said bearing cover plate (6) and through one orifice parameter adjustable static gas radial bearing (8) of claims 1-7 and being connected at one end to the impeller (5), said one orifice parameter adjustable static gas radial bearing (8) being mounted on the bearing cover plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210205533.8A CN114508547A (en) | 2022-03-04 | 2022-03-04 | Static pressure gas radial bearing with adjustable throttling hole parameters and centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210205533.8A CN114508547A (en) | 2022-03-04 | 2022-03-04 | Static pressure gas radial bearing with adjustable throttling hole parameters and centrifugal fan |
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| Publication Number | Publication Date |
|---|---|
| CN114508547A true CN114508547A (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210205533.8A Pending CN114508547A (en) | 2022-03-04 | 2022-03-04 | Static pressure gas radial bearing with adjustable throttling hole parameters and centrifugal fan |
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| CN (1) | CN114508547A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992245A (en) * | 2022-07-12 | 2022-09-02 | 安徽润安思变能源技术有限公司 | Static pressure gas radial bearing and mounting equipment thereof |
| CN115163667A (en) * | 2022-07-27 | 2022-10-11 | 合肥工业大学 | Vortex type air outlet plane static pressure air bearing |
-
2022
- 2022-03-04 CN CN202210205533.8A patent/CN114508547A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114992245A (en) * | 2022-07-12 | 2022-09-02 | 安徽润安思变能源技术有限公司 | Static pressure gas radial bearing and mounting equipment thereof |
| CN114992245B (en) * | 2022-07-12 | 2024-05-07 | 安徽润安思变能源技术有限公司 | Static pressure gas radial bearing and installation equipment thereof |
| CN115163667A (en) * | 2022-07-27 | 2022-10-11 | 合肥工业大学 | Vortex type air outlet plane static pressure air bearing |
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