CN114321179A - Static pressure gas thrust bearing with adjustable throttle orifice parameters and centrifugal compressor - Google Patents
Static pressure gas thrust bearing with adjustable throttle orifice parameters and centrifugal compressor Download PDFInfo
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- CN114321179A CN114321179A CN202111614035.0A CN202111614035A CN114321179A CN 114321179 A CN114321179 A CN 114321179A CN 202111614035 A CN202111614035 A CN 202111614035A CN 114321179 A CN114321179 A CN 114321179A
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- 230000003068 static effect Effects 0.000 title claims abstract description 25
- 230000002706 hydrostatic effect Effects 0.000 claims description 7
- 239000002390 adhesive tape Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention discloses a static pressure gas thrust bearing with adjustable throttling hole parameters and a centrifugal compressor, and relates to the field of high-speed rotating machinery. The bearing is composed of a bearing seat and a thrust disc; the non-working surface of the bearing seat is provided with an air supply hole, 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 thrust 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 of the static pressure gas thrust bearing is adjusted; the screw is easy to disassemble and assemble, and the throttling hole parameters can be adjusted conveniently according to load distribution, so that the same bearing seat 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 thrust bearing with adjustable throttle orifice parameters and a centrifugal compressor.
Background
The static pressure gas thrust 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 fields of high-speed rotating machinery such as centrifugal compressors, centrifugal fans, turbo expanders and the like, data center cooling and the like. The bearing rigidity is the main performance index of the static pressure gas thrust bearing and is also the key for ensuring the precision and the precision retentivity of the bearing. The small-hole throttling static pressure gas thrust bearing adopts the throttling hole with a small hole diameter and the small bearing gap, so that 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, most of traditional static pressure gas thrust bearings adopt a mode of directly punching holes on bearing seats to arrange throttling holes, the punching mode has high operation difficulty, and a drill bit is easy to break during drilling; 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 thrust 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 thrust bearing with adjustable orifice parameters, which can optimize the bearing capacity under different load and lubricating medium conditions and has good processing and assembly performance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a static pressure gas thrust bearing with adjustable throttling hole parameters comprises a bearing seat and a thrust plate, wherein a gas supply hole is formed in the non-working surface of the bearing seat, 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 or multiple rows along the radial 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 apertures of the orifices in the same row of screws are the same, and the apertures of the orifices in the screws in different rows can be the same or different.
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.
In another aspect, the present invention provides a centrifugal compressor, including: an impeller, a bearing cover plate, a rotor, wherein the rotor passes through the bearing cover plate and the static pressure gas thrust bearing with adjustable throttle hole parameters, and one end of the rotor is connected with the impeller, and the static pressure gas thrust bearing with adjustable throttle 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 thrust 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 screws with holes of different specifications, so that the throttling effect of the clearance 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 compressor, 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 of a hydrostatic gas thrust bearing with adjustable orifice parameters in accordance with the present invention.
Fig. 2 is a schematic structural diagram of a bearing seat (i) 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 of the bearing seat (ii) of the present invention.
Fig. 6 is a transverse sectional view of the bearing housing (ii) of the present invention.
FIG. 7 is a schematic view of a static gas thrust bearing in accordance with an embodiment of the present invention applied to a centrifugal compressor.
In the figure, 1 is a bearing seat, 2 is a thrust plate, 3 is an air supply hole, 4 is a threaded hole, 5 is a screw, 6 is an orifice, 7 is an impeller, 8 is a bearing cover plate, 9 is a rotor, and 10 is a static pressure gas thrust 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 static pressure gas thrust bearing with adjustable throttle orifice parameters is shown in figure 1 and comprises a bearing block 1 and a thrust plate 2, wherein a non-working surface of the bearing block 1 is provided with a gas supply hole 3, and a threaded hole 4 is formed below the gas supply hole 3; the orifice at the upper end of the threaded hole 4 is communicated with the air supply hole 3, and the lower end of the threaded hole is positioned on the bearing working surface; a screw 5 is arranged in the threaded hole 4, and an orifice 6 is formed in the screw 5.
As shown in fig. 1, the air supply hole 3 is coaxial with the threaded hole 4, and the diameter of the air supply hole 3 is larger than or equal to that of the threaded hole 4; the orifice 6 is coaxial with the external thread on the screw.
As shown in fig. 1, the screw 5 and the threaded hole 4 are sealed by using a thread fastening glue or a raw adhesive tape.
As shown in fig. 1, the depth of the equalizing groove and whether the equalizing groove 4.1 is arranged or not are changed by changing the depth of the screw 5 screwed into the threaded hole 4; when the screw 5 is matched with the threaded hole 4, if a pressure equalizing groove 4.1 is required to be arranged, the bottom end of the screw is flush with the working surface of the bearing seat; when the pressure equalizing groove is not needed to be arranged, the bottom end of the screw is a distance away from the working surface of the bearing seat. In the present embodiment, a form in which no pressure equalizing groove is provided is shown.
As shown in fig. 1 and 5, the same row of threaded holes 4 are uniformly distributed along the circumferential direction of the bearing, wherein the diameters of the orifices 6 of the screws 5 are the same, and the diameters of the orifices 6 of the screws 5 in different rows may be the same or different. .
As shown in fig. 2 and 5, the threaded holes 4 are distributed in one or more rows along the radial direction of the bearing seat 1, the threaded holes 4 in each row are uniformly distributed along the circumferential direction of the bearing seat, and the number of each row is 4-24.
As shown in fig. 3, the screw 5 includes one or more of a socket head cap set screw, a straight socket head set screw, and a cross socket head set screw.
As shown in fig. 4, the throttle hole 6 formed on the screw 5 is a through hole, the screw 5 is divided into a plurality of specifications according to the aperture d of the throttle hole 6, and the throttle hole depth h can be changed by forming the throttle hole 6 on the screw 5 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. 1, 3 and 4, in order to change the arrangement of the orifices 6 on the bearing block 1, some of the screws 5 may not be opened.
In this embodiment, threaded hole 4 is one row along the radial distribution of bearing frame, and the number of threaded hole is 8, and what screw 5 adopted is the hexagon socket head cap screw of the same specification.
33. 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 4 are distributed in two rows along the radial direction of the bearing seat, the number of the threaded holes in each row is 16, and if the number of the orifices 6 is to be changed, the screws 5 with orifices and the screws without orifices are used in each row of the threaded holes at intervals; if only one row of orifices is needed, then screws without holes can be used in the other row of threaded holes.
Example 3:
as shown in FIG. 7, a rotor 9 passes through a bearing cover plate 8 and a static pressure gas radial bearing 10 with adjustable orifice parameters provided by the invention and is connected with an impeller 7 at one end, and a static pressure gas thrust bearing 8 with adjustable orifice parameters is arranged on the bearing cover plate 8 and is connected with the bearing cover plate 8 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 holes in the bearing seat, 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 thrust 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 thrust bearing with adjustable throttling hole parameters is characterized by comprising a bearing seat (1) and a thrust disc (2), wherein a non-working surface of the bearing seat (1) is provided with a gas supply hole (3), and a threaded hole (4) is formed below the gas supply hole (3); the orifice at the upper end of the threaded hole (4) is communicated with the air supply hole (3), and the lower end of the threaded hole is positioned on the bearing working surface; and a screw (5) is arranged in the threaded hole (4), and an orifice (6) is formed in the screw (5).
2. An orifice parameter adjustable hydrostatic gas thrust bearing as set forth in claim 1, wherein: an orifice (6) is formed in the screw (5), the orifice (6) and the external thread on the screw (5) are coaxial, and the aperture of the orifice (6) is 0.1-0.8 mm.
3. An orifice parameter adjustable hydrostatic gas thrust bearing as set forth in claim 1, wherein: the threaded holes (4) are distributed in one row or multiple rows along the radial direction of the bearing seat, 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 thrust bearing as set forth in claim 1, wherein: the diameters of the throttling holes (6) in the same row of screws (5) are the same, and the diameters of the throttling holes (6) in the screws (5) in different rows can be the same or different.
5. An orifice parameter adjustable hydrostatic gas thrust bearing as set forth in claim 1, wherein: the screw (5) comprises one or more of a hexagon socket concave end set screw, a straight concave end set screw and a cross concave end set screw, and the screw (5) and the threaded hole (4) are sealed by adopting thread fastening glue or raw adhesive tape.
6. An orifice parameter adjustable hydrostatic gas thrust bearing as set forth in claim 1, wherein: the air supply hole (3) and the threaded hole (4) are coaxial, and the diameter of the air supply hole (3) is larger than or equal to that of the threaded hole (4).
7. An orifice parameter adjustable hydrostatic gas thrust bearing as set forth in claim 1, wherein: the depth of the equalizing groove (4.1) and whether the equalizing groove is arranged or not are changed by changing the depth of the screw (5) screwed into the threaded hole (4).
8. A centrifugal compressor, comprising: -an impeller (7), -a bearing cover plate (8), -a rotor (9), said rotor (9) passing through said bearing cover plate (8) and an orifice parameter adjustable aerostatic thrust bearing (10) of claims 1 to 7 and being connected at one end to the impeller (7), said orifice parameter adjustable aerostatic thrust bearing (10) being mounted on the bearing cover plate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111614035.0A CN114321179A (en) | 2021-12-27 | 2021-12-27 | Static pressure gas thrust bearing with adjustable throttle orifice parameters and centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111614035.0A CN114321179A (en) | 2021-12-27 | 2021-12-27 | Static pressure gas thrust bearing with adjustable throttle orifice parameters and centrifugal compressor |
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| CN114321179A true CN114321179A (en) | 2022-04-12 |
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| CN202111614035.0A Pending CN114321179A (en) | 2021-12-27 | 2021-12-27 | Static pressure gas thrust bearing with adjustable throttle orifice parameters and centrifugal compressor |
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| CN (1) | CN114321179A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62137413A (en) * | 1985-12-05 | 1987-06-20 | Nachi Fujikoshi Corp | Orifice throttle type gas bearing |
| JP2005282635A (en) * | 2004-03-29 | 2005-10-13 | Jiichi Muraki | Orifice throttling type static pressure gas bearing |
| JP2011241971A (en) * | 2010-05-21 | 2011-12-01 | Ihi Corp | Throttle valve |
| CN106382302A (en) * | 2016-11-24 | 2017-02-08 | 天津职业技术师范大学 | Static pressure bearing capable of realizing online pressure fault detection and rapid maintenance |
| CN106640971A (en) * | 2017-03-09 | 2017-05-10 | 中国工程物理研究院机械制造工艺研究所 | Hydrostatic gas thrust bearing |
| CN206329633U (en) * | 2016-11-03 | 2017-07-14 | 东北林业大学 | A kind of annular groove taper hole dynamical and static pressure gas bearing |
| CN109882505A (en) * | 2019-03-22 | 2019-06-14 | 厦门大学 | A kind of adjustable minute groove flow controller of Throttling ratio |
| CN110617272A (en) * | 2019-09-27 | 2019-12-27 | 广东工业大学 | Air bearing |
| CN113107893A (en) * | 2020-01-09 | 2021-07-13 | 珠海格力电器股份有限公司 | Axial air suspension bearing, compressor and air conditioner |
| CN113187816A (en) * | 2021-03-04 | 2021-07-30 | 湖南大学 | Active static pressure gas thrust bearing |
| CN214534064U (en) * | 2021-02-05 | 2021-10-29 | 中国工程物理研究院机械制造工艺研究所 | Small hole and slit composite throttling gas static pressure thrust bearing |
-
2021
- 2021-12-27 CN CN202111614035.0A patent/CN114321179A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62137413A (en) * | 1985-12-05 | 1987-06-20 | Nachi Fujikoshi Corp | Orifice throttle type gas bearing |
| JP2005282635A (en) * | 2004-03-29 | 2005-10-13 | Jiichi Muraki | Orifice throttling type static pressure gas bearing |
| JP2011241971A (en) * | 2010-05-21 | 2011-12-01 | Ihi Corp | Throttle valve |
| CN206329633U (en) * | 2016-11-03 | 2017-07-14 | 东北林业大学 | A kind of annular groove taper hole dynamical and static pressure gas bearing |
| CN106382302A (en) * | 2016-11-24 | 2017-02-08 | 天津职业技术师范大学 | Static pressure bearing capable of realizing online pressure fault detection and rapid maintenance |
| CN106640971A (en) * | 2017-03-09 | 2017-05-10 | 中国工程物理研究院机械制造工艺研究所 | Hydrostatic gas thrust bearing |
| CN109882505A (en) * | 2019-03-22 | 2019-06-14 | 厦门大学 | A kind of adjustable minute groove flow controller of Throttling ratio |
| CN110617272A (en) * | 2019-09-27 | 2019-12-27 | 广东工业大学 | Air bearing |
| CN113107893A (en) * | 2020-01-09 | 2021-07-13 | 珠海格力电器股份有限公司 | Axial air suspension bearing, compressor and air conditioner |
| CN214534064U (en) * | 2021-02-05 | 2021-10-29 | 中国工程物理研究院机械制造工艺研究所 | Small hole and slit composite throttling gas static pressure thrust bearing |
| CN113187816A (en) * | 2021-03-04 | 2021-07-30 | 湖南大学 | Active static pressure gas thrust bearing |
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Effective date of registration: 20230512 Address after: Room 99, Room 706, 7th Floor, Block A, Zhongdeng Wenjing Building, Fengcheng 9th Road, Xi'an Economic and Technological Development Zone, Shaanxi Province, 710000 Applicant after: Qicheng Suspension Technology (Xi'an) Co.,Ltd. Address before: No.22 Xinong Road, Yangling Demonstration Zone, Xianyang City, Shaanxi Province, 712100 Applicant before: NORTHWEST A & F University |