CN111963262A - Outline type air bearing - Google Patents

Outline type air bearing Download PDF

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Publication number
CN111963262A
CN111963262A CN202011008033.2A CN202011008033A CN111963262A CN 111963262 A CN111963262 A CN 111963262A CN 202011008033 A CN202011008033 A CN 202011008033A CN 111963262 A CN111963262 A CN 111963262A
Authority
CN
China
Prior art keywords
air bearing
wheel
type
wheel cover
bearing
Prior art date
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.)
Pending
Application number
CN202011008033.2A
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Chinese (zh)
Inventor
黄若
郭文杰
高泽
黄仕豪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konotebo (Beijing) Technology Co.,Ltd.
Original Assignee
Pingxiang Beijing Institute Of Technology High-Tech Research Institute
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pingxiang Beijing Institute Of Technology High-Tech Research Institute filed Critical Pingxiang Beijing Institute Of Technology High-Tech Research Institute
Priority to CN202011008033.2A priority Critical patent/CN111963262A/en
Publication of CN111963262A publication Critical patent/CN111963262A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/18—Lubricating arrangements
    • F01D25/22—Lubricating arrangements using working-fluid or other gaseous fluid as lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/057—Bearings hydrostatic; hydrodynamic
    • 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
    • F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
    • F16C17/102—Sliding-contact bearings for exclusively rotary movement for both radial and axial load with grooves in the bearing surface to generate hydrodynamic pressure
    • 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
    • F16C17/12—Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load
    • 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
    • F16C2360/00—Engines or pumps
    • F16C2360/23—Gas turbine engines
    • F16C2360/24—Turbochargers

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Supercharger (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a profile type air bearing which comprises a profile type air bearing, wherein the profile type air bearing is applied to closed type rotary fluid machinery, and the outer surface of a working wheel cover of the closed type rotary fluid machinery is designed to be the combination of a cylindrical surface on the outer side of the wheel cover and a conical surface on the outer side of the wheel cover. The invention slightly modifies the shape of the outer surface of the wheel cover of the closed rotary fluid machine working wheel to form an air bearing mounting surface, and the radial air bearing and the thrust air bearing can fully utilize the surface of the working wheel as the mounting surface, thereby changing the traditional layout of the bearing on a rotor shaft and greatly shortening the length of a short shaft; meanwhile, the shortening of the rotor and the appropriate increase of the relative span of the bearing are beneficial to reducing the additional load of the bearing and improving the rotating speed.

Description

Outline type air bearing
Technical Field
The invention relates to the field of bearings, in particular to a contour type air bearing.
Background
The air bearing adopts gas as a lubricant, and the bearing is free of mechanical contact and almost free of abrasion, so that higher rotation precision and higher rotation speed are guaranteed, and the air bearing is high-temperature resistant, free of pollution, long in service life and widely applied to various rotating machines.
The main components of a high-speed rotating machine are a rotor, a stator, a bearing, etc., wherein the mass of the rotor of one type of rotating machine is concentrated at two ends of the rotor, typically a turbocharger, a turbine generator, a double-balance-block rotor dynamic balancing machine, etc., and the bearing is usually arranged in the middle of the rotor. In a rotary fluid machine represented by a turbocharger, a rotor shaft is generally long for the convenience of arranging bearings and seal structures, and the mass of a rotor is concentrated on a rotor wheel, namely, two ends of the rotor, so that the rotor tends to be more susceptible to instability and larger in amplitude.
Turbine and compressor wheel all have closed structure, and its leakage loss is littleer, intensity is better, and current advanced material increase manufacturing process is mature gradually, is favorable to the manufacturing and the application of small-size closed working wheel, and provides probably for the processing of more complicated runner. When the materials are the same, the closed type working wheel is usually higher in mass, is not beneficial to improving the rotating speed, and brings greater challenge to the stability of the rotor.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the invention provides a profile air bearing,
the closed fluid machine working wheel cover outer surface is designed to be the combination of a wheel cover outer side cylindrical surface and a wheel cover outer side conical surface.
Preferably, when the outline type air bearing is used as an outline type radial air bearing, the outline type radial air bearing is arranged on the cylindrical surface outside the wheel cover of the closed type working wheel, and the closed type working wheel adopts a turbine wheel and/or a compressor wheel.
Preferably, when the outline type air bearing is used as an outline type thrust air bearing, the outline type thrust air bearing can be arranged on the back surface of a turbine wheel and/or the outer side conical surface of a wheel cover of a compressor; for a machine in which the compressor wheel and the turbine wheel are combined into a single rotor, such as a turbocharger, only a profile thrust air bearing needs to be installed on the back surface of the turbine wheel.
Preferably, the profiled air bearing is configured as a dynamic pressure air bearing, and the profiled air bearing structure includes, but is not limited to, a wave foil type and a cantilever type.
The invention has the beneficial effects
The invention slightly modifies the shape of the outer surface of the wheel cover of the closed rotary fluid machine working wheel to form an air bearing mounting surface, and the radial air bearing and the thrust air bearing can fully utilize the surface of the working wheel as the mounting surface, thereby changing the traditional layout of the bearing on a rotor shaft and greatly shortening the length of a short shaft; meanwhile, the shortening of the rotor and the appropriate increase of the relative span of the bearing are beneficial to reducing the additional load of the bearing and improving the rotating speed; in addition, the layout mode of the outline air bearing is beneficial to the miniaturization of the whole machine so as to improve the power density.
Drawings
Fig. 1 is a schematic view of a closed turbine/compressor wheel.
Fig. 2 is a schematic view of a wave foil type dynamic pressure air bearing structure.
Fig. 3 is a schematic structural view of a cantilever type dynamic pressure air bearing.
FIG. 4 is a schematic view of a turbocharger configuration employing a contoured air bearing.
Description of reference numerals: 1. the outer cylindrical surface of the wheel cover; 2. the wheel back; 3. the outer side conical surface of the wheel cover; 4. a closed turbine; 5. a closed compressor wheel; 6. a turbine shell; 7. a compressor housing; 8. a middle shell; 9. a shaft; 10. a contoured radial air bearing; 11. a contoured thrust air bearing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a profile type air bearing which comprises a profile type air bearing, wherein the profile type air bearing is applied to a closed type rotary fluid machine, and the outer surface of a working wheel cover of the closed type rotary fluid machine is designed to be the combination of a cylindrical surface 1 on the outer side of the wheel cover and a conical surface 3 on the outer side of the wheel cover, as shown in figure 1.
Further, when the contour type air bearing is used as the contour type radial air bearing 10, the contour type air bearing is used as the contour type radial air bearing and is installed on the cylindrical surface 1 on the outer side of the wheel cover of the closed type working wheel, and the closed type working wheel adopts a turbine wheel and/or a compressor wheel.
Furthermore, when the outline type air bearing is used as an outline type thrust air bearing 11, the outline type thrust air bearing can be arranged on the back surface 2 of a turbine wheel or the outer conical surface 3 of a wheel cover of a compressor; for machines in which the compressor wheel and turbine wheel are combined into a single rotor, such as a turbocharger, it is only necessary to mount the contoured thrust air bearing 11 on the turbine wheel back face 2.
Further, the contour air bearing is a dynamic pressure air bearing, and the bearing structure includes, but is not limited to, a wave foil type (as shown in fig. 2), a cantilever type (as shown in fig. 3), and the like.
Fig. 4 shows a turbocharger using a contour type air bearing, which includes a closed turbine 4, a closed compressor wheel 5, a turbine housing 6, a compressor housing 7, an intermediate housing 8 and a shaft 9, wherein the outer surfaces of the wheel covers of the closed turbine 4 and the closed compressor wheel 5 are the combination of a wheel cover outer side cylindrical surface 1 and a wheel cover outer side conical surface 3; two outline radial air bearings 10 are respectively arranged between the closed turbine 4 and the turbine shell 6 and between the closed compressor wheel 5 and the compressor shell 7; the profiled thrust air bearing 11 is arranged on the rear side of the closed turbine 4.
It can be seen that, because the turbocharger uses a profile air bearing, the shaft 9 is greatly shortened, so that the volume of the turbocharger is greatly reduced, and meanwhile, the shortening of the rotor and the proper increase of the relative span of the bearing are beneficial to reducing the additional load of the bearing and improving the rotating speed.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (4)

1. A profile type air bearing is characterized in that,
the closed fluid machine working wheel cover outer surface is designed to be the combination of a wheel cover outer side cylindrical surface and a wheel cover outer side conical surface.
2. A contoured air bearing according to claim 1,
when the outline type air bearing is used as an outline type radial air bearing, the outline type air bearing is arranged on the cylindrical surface on the outer side of a wheel cover of the closed type working wheel, and the closed type working wheel adopts a turbine wheel and/or a compressor wheel.
3. A contoured air bearing according to claim 1,
when the outline type air bearing is used as an outline type thrust air bearing, the outline type thrust air bearing can be arranged on the back surface of a turbine wheel and/or the conical surface on the outer side of a wheel cover of a gas compressor; for a machine in which the compressor wheel and the turbine wheel are combined into a single rotor, such as a turbocharger, only a profile thrust air bearing needs to be installed on the back surface of the turbine wheel.
4. A contoured air bearing according to claim 1,
the contour air bearing is set as a dynamic pressure air bearing, and the contour air bearing structure comprises but is not limited to a wave foil type and a cantilever type.
CN202011008033.2A 2020-09-23 2020-09-23 Outline type air bearing Pending CN111963262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011008033.2A CN111963262A (en) 2020-09-23 2020-09-23 Outline type air bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011008033.2A CN111963262A (en) 2020-09-23 2020-09-23 Outline type air bearing

Publications (1)

Publication Number Publication Date
CN111963262A true CN111963262A (en) 2020-11-20

Family

ID=73387328

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011008033.2A Pending CN111963262A (en) 2020-09-23 2020-09-23 Outline type air bearing

Country Status (1)

Country Link
CN (1) CN111963262A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004022921A1 (en) * 2002-09-05 2004-03-18 Electricite De France Service National Gas turbine with radial-type turbine wheel
WO2011042863A2 (en) * 2009-10-06 2011-04-14 Cmt Systems-Ceramic Micro Turbine Technologies Ltd Bladeless working wheel useful as a turbomachine component
JP2013032797A (en) * 2011-08-01 2013-02-14 Ntn Corp Foil bearing
JP2013044394A (en) * 2011-08-24 2013-03-04 Ntn Corp Thrust foil bearing
CN104343747A (en) * 2014-10-14 2015-02-11 清华大学 Axial force balancing structure of centrifugal closed impeller
WO2017104009A1 (en) * 2015-12-16 2017-06-22 三菱電機株式会社 Blower and vacuum cleaner provided with blower
JP2017172764A (en) * 2016-03-25 2017-09-28 Ntn株式会社 Foil bearing

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004022921A1 (en) * 2002-09-05 2004-03-18 Electricite De France Service National Gas turbine with radial-type turbine wheel
WO2011042863A2 (en) * 2009-10-06 2011-04-14 Cmt Systems-Ceramic Micro Turbine Technologies Ltd Bladeless working wheel useful as a turbomachine component
JP2013032797A (en) * 2011-08-01 2013-02-14 Ntn Corp Foil bearing
JP2013044394A (en) * 2011-08-24 2013-03-04 Ntn Corp Thrust foil bearing
CN104343747A (en) * 2014-10-14 2015-02-11 清华大学 Axial force balancing structure of centrifugal closed impeller
WO2017104009A1 (en) * 2015-12-16 2017-06-22 三菱電機株式会社 Blower and vacuum cleaner provided with blower
JP2017172764A (en) * 2016-03-25 2017-09-28 Ntn株式会社 Foil bearing

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SE01 Entry into force of request for substantive examination
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Effective date of registration: 20220411

Address after: 100000 floor 2, building 683, zone 2, No. 5, Zhongguancun South Street, Haidian District, Beijing 20124

Applicant after: Taibohua (Beijing) Technology Co.,Ltd.

Address before: 337000 room 805, economic and trade building, Pingxiang economic and Technological Development Zone, Jiangxi Province

Applicant before: PINGXIANG BEIJING INSTITUTE OF TECHNOLOGY HIGH-TECH Research Institute

Effective date of registration: 20220411

Address after: 100000 30109, floor 3, building 683, zone 2, No. 5, Zhongguancun South Street, Haidian District, Beijing

Applicant after: Konotebo (Beijing) Technology Co.,Ltd.

Address before: 100000 floor 2, building 683, zone 2, No. 5, Zhongguancun South Street, Haidian District, Beijing 20124

Applicant before: Taibohua (Beijing) Technology Co.,Ltd.

TA01 Transfer of patent application right
RJ01 Rejection of invention patent application after publication

Application publication date: 20201120

RJ01 Rejection of invention patent application after publication