CN110594284A - Radial air bearing and assembly of micro gas turbine generator and installation method of radial air bearing and assembly - Google Patents
Radial air bearing and assembly of micro gas turbine generator and installation method of radial air bearing and assembly Download PDFInfo
- Publication number
- CN110594284A CN110594284A CN201910910878.1A CN201910910878A CN110594284A CN 110594284 A CN110594284 A CN 110594284A CN 201910910878 A CN201910910878 A CN 201910910878A CN 110594284 A CN110594284 A CN 110594284A
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- CN
- China
- Prior art keywords
- air bearing
- rotating shaft
- radial air
- gas turbine
- turbine generator
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- 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.)
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Classifications
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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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
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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)
- Sliding-Contact Bearings (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention discloses a radial air bearing and a component of a micro gas turbine generator and an installation method thereof, wherein the radial air bearing comprises a rotating shaft, a shaft sleeve is sleeved outside the rotating shaft, a groove is formed in the shaft sleeve, an elastic sheet and an anti-abrasion sheet are placed between the rotating shaft and the shaft sleeve, and the elastic sheet and the anti-abrasion sheet are both installed in the groove; when the rotating shaft rotates at a high speed, the bearing gas film with enough rigidity is automatically formed to lift the rotating shaft, the mechanical friction loss is extremely low, lubricating oil is not needed in the rotating shaft, heat dissipation is not needed for air, the requirement for ultrahigh-speed rotation of the rotating part of the micro gas turbine generator can be met, meanwhile, the assembling process of the rotating part of the micro gas turbine generator is more convenient and faster, and large-scale industrial production of the micro gas turbine generator is facilitated.
Description
Technical Field
The invention relates to a bearing, in particular to a radial air bearing of a micro gas turbine generator, a radial air bearing assembly and an installation method of the radial air bearing assembly.
Background
The bearing is an important part in the modern mechanical equipment. Its main function is to support the mechanical rotator, reduce the friction coefficient in its motion process and ensure its rotation precision.
Most of gas turbines in the current market use oil film sliding bearings, and the gas turbines using the oil film bearings cannot increase the rotating speed, and in addition, huge heat dissipation equipment is needed to cool lubricating oil, the maintenance period is frequent, and the like.
Disclosure of Invention
The invention provides a radial air bearing of a micro gas turbine generator, which is used for overcoming the defects that the gas turbine of an oil film bearing in the prior art cannot improve the rotating speed, and in addition, huge heat dissipation equipment is required for cooling lubricating oil, so that the maintenance period is frequent.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention discloses a radial air bearing assembly of a micro gas turbine generator, which comprises a rotating shaft, wherein the outer side of the rotating shaft is sleeved with a shaft sleeve, a groove is formed in the shaft sleeve, an elastic sheet and an anti-abrasive sheet are placed between the rotating shaft and the shaft sleeve, and the elastic sheet and the anti-abrasive sheet are both arranged in the groove, and the radial air bearing assembly comprises: the starting part and the power part are connected through a coupling; the starting portion includes: radial air bearings are respectively arranged on two sides of the motor rotating shaft; the power section includes: the outer part of the hollow shaft is provided with a one-piece radial air bearing; the integral radial air bearing includes: the air compressor comprises a rotating shaft provided with an air bearing, and an air compressing impeller and a turbine which are positioned on two sides of the rotating shaft in the same horizontal direction.
Furthermore, the rotating shaft and the shaft sleeve are in the same circle center.
Furthermore, the radians of the elastic sheet and the anti-abrasive sheet are matched with the radian of the shaft sleeve.
Furthermore, the elastic sheet is close to the inner wall of the shaft sleeve, and the wear-resistant sheet is close to the outer wall of the rotating shaft.
Furthermore, the anti-abrasive discs are arranged in a circle by taking the center of the rotating shaft as the center of a circle and are sequentially pressed end to end.
A method of installing an air bearing assembly comprising the steps of:
at the start-up end, install a radial air bearing respectively in the left and right sides of motor shaft:
the left radial air bearing is sleeved from one end of the left side of the motor rotating shaft, due to the characteristics of the air bearing, an air gap is reserved between the inner wall of the air bearing and the outer wall of the motor rotating shaft, so that a bearing air film with enough rigidity can be continuously generated when the motor rotating shaft rotates at a high speed, the air bearing is sleeved when the motor rotating shaft is static, and the bearing and the rotating shaft are required to be tightly combined and even a wooden hammer is used for knocking the bearing to a specific position of the rotating shaft unlike the installation of a traditional oil lubrication bearing. Then, when a non-rotating part is installed, the left radial air bearing and the front bearing seat are fixedly installed;
the right radial air bearing is sleeved from one end of the right side of the motor rotating shaft, due to the characteristics of the air bearing, an air gap is reserved between the inner wall of the air bearing and the outer wall of the motor rotating shaft, so that a bearing air film with enough rigidity can be continuously generated when the rotating shaft rotates at a high speed, the air bearing is sleeved when the motor rotating shaft is static, and the bearing and the rotating shaft are required to be tightly combined and even a wooden hammer is used for knocking the bearing to a specific position of the rotating shaft unlike the installation of a traditional oil lubrication bearing. Then, when a non-rotating part is installed, the right radial air bearing and the rear bearing seat are fixedly installed;
at the power end, a one-piece radial air bearing is mounted on the outside of the hollow shaft and maintains the air bearing laterally between the compressor wheel and the turbine:
the integrated radial air bearing and the bearing seat are fixedly installed firstly, then the hollow shaft is installed in the air bearing, and an air gap is reserved between the inner wall of the air bearing and the outer wall of the hollow shaft, so that a bearing air film with enough rigidity can be continuously generated when the hollow shaft rotates at a high speed, and the hollow shaft is easily installed in the air bearing.
Then, the compressor impeller and the hollow shaft are assembled together in a cold and hot matching mode, and finally, the turbine and the hollow shaft are assembled together in a cold and hot matching mode.
The invention has the following beneficial effects: when the rotating shaft rotates at a high speed, the bearing gas film with enough rigidity is automatically formed to lift the rotating shaft, the mechanical friction loss is extremely low, lubricating oil is not needed in the rotating shaft, heat dissipation is not needed for air, the requirement for ultrahigh-speed rotation of the rotating part of the micro gas turbine generator can be met, meanwhile, the assembling process of the rotating part of the micro gas turbine generator is more convenient and faster, and large-scale industrial production of the micro gas turbine generator is facilitated.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic view of an air bearing assembly of the present invention.
In the figure: 1. a shaft sleeve; 2. a first groove; 3. a first spring plate; 4. a first anti-abrasive sheet; 5. a second groove; 6. a second elastic sheet; 7. a second wear resistant sheet; 8. a third groove; 9. a third elastic sheet; 10. a third anti-abrasive sheet; 11. a fourth groove; 12. a fourth spring plate; 13. a fourth anti-abrasive sheet; 14. a fifth groove; 15. a fifth elastic sheet; 16. fifth anti-abrasive disc; 17. a sixth groove; 18. a sixth elastic sheet; 19. a sixth anti-abrasive sheet; 20. a rotating shaft; 21. a radial air bearing; 22. a motor shaft; 23. a compressed air impeller; 24. a conjoined radial air bearing; 25. a hollow shaft; 26. a turbine.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1
As shown in fig. 1-2, a radial air bearing assembly of a micro gas turbine generator includes a rotating shaft 20, a shaft sleeve 1 is sleeved outside the rotating shaft 20, and 6 grooves are formed in the shaft sleeve 1, and they are respectively: first recess 2, second recess 5, third recess 8, fourth recess 11, fifth recess 14 and sixth recess 17, 6 shell fragment and 6 anti abrasive disc have been placed to the recess, and it is respectively: the first elastic sheet 3, the second elastic sheet 6, the third elastic sheet 9, the fourth elastic sheet 12, the fifth elastic sheet 15 and the sixth elastic sheet 18 are combined; first anti abrasive disc 4, second anti abrasive disc 7, third anti abrasive disc 10, fourth anti abrasive disc 13, fifth anti abrasive disc 16 closes sixth anti abrasive disc 19, the shell fragment is close to 1 inner wall of axle sleeve, anti abrasive disc is close to 20 outer walls of pivot, and the radian of shell fragment and anti abrasive disc all cooperatees with the radian of axle sleeve 1, and the piece that wear-resistants uses the center of pivot 20 as the centre of a circle, is the circumference and arranges to head and the tail are pressed mutually in proper order, and radial air bearing assembly includes: the starting part and the power part are connected through a coupling; the starting portion includes: the motor comprises a motor rotating shaft 22, wherein radial air bearings 21 are respectively arranged on two sides of the motor rotating shaft 22 in the same horizontal direction; the power section includes: a hollow shaft 25, the exterior of said hollow shaft 25 being fitted with a one-piece radial air bearing 24; the integrated radial air bearing 24 includes: a rotating shaft provided with an air bearing 21, and a compressor impeller 23 and a turbine 26 which are positioned at two sides of the rotating shaft in the same horizontal direction.
The specific installation mode is as follows: assembling the first elastic sheet 3 and the first anti-grinding sheet 4 together to form an assembly, and then installing the assembly into the first groove 2 in a mode that the first elastic sheet 3 is close to one side of the inner wall of the shaft sleeve 1 and the first anti-grinding sheet 4 is close to one side of the outer wall of the rotating shaft 20; the sixth elastic piece 18 and the sixth anti-grinding piece 19 are assembled together to form an assembly, and then the assembly is arranged in the sixth groove 17 in a mode that the sixth elastic piece 18 is close to one side of the inner wall of the shaft sleeve 1 and the sixth anti-grinding piece 19 is close to one side of the outer wall of the rotating shaft 20. While keeping the sixth anti-grinding sheet 19 pressed against the outer side of the first anti-grinding sheet 4; the fifth elastic piece 15 and the fifth anti-grinding piece 16 are assembled together to form an assembly, and then the assembly is installed in the fifth groove 14 in a mode that the fifth elastic piece 15 is close to one side of the inner wall of the shaft sleeve 1 and the fifth anti-grinding piece 16 is close to one side of the outer wall of the rotating shaft 20. While keeping the fifth anti-grinding sheet 16 pressed against the outer side of the sixth anti-grinding sheet 19; the fourth elastic sheet 12 and the fourth anti-grinding sheet 13 are assembled together to form an assembly, and then the assembly is arranged in the fourth groove 11 in a mode that the fourth elastic sheet 12 is close to one side of the inner wall of the shaft sleeve 1 and the fourth anti-grinding sheet 13 is close to one side of the outer wall of the rotating shaft 20. While keeping the fourth anti-grinding sheet 13 pressed against the outer side of the fifth anti-grinding sheet 16; the third elastic sheet 9 and the third anti-grinding sheet 10 are assembled together to form an assembly, and then the assembly is arranged in the third groove 8 in a mode that the third elastic sheet 9 is close to one side of the inner wall of the shaft sleeve 1 and the third anti-grinding sheet 10 is close to one side of the outer wall of the rotating shaft 20. While keeping the third anti-grinding sheet 10 pressed against the outer side of the fourth anti-grinding sheet 13; the second elastic sheet 6 and the second abrasion resistant sheet 7 are assembled together to form an assembly, and then the assembly is arranged in the second groove 5 in a mode that the second elastic sheet 6 is close to one side of the inner wall of the rotating shaft 1 and the second abrasion resistant sheet 7 is close to one side of the outer wall of the rotating shaft 20. While keeping the second anti-grinding sheet 7 pressed against the outer side of the third anti-grinding sheet 10, the second anti-grinding sheet 7 is placed on the inner side of the first anti-grinding sheet 4.
The anti-wear sheet is close to one side of the outer wall of the rotating shaft 20, and the elastic sheet is close to one side of the inner wall of the shaft sleeve 1. The air in the environment surrounding the anti-grinding sheet and the elastic sheet is used as a lubricant, and the anti-grinding sheet and the elastic sheet are used as elastic supporting pieces together. When the rotating shaft rotates at a high speed, the rotating shaft 20 is lifted by the self-formed carrier gas film with sufficient rigidity. Meanwhile, because the air viscosity can be almost ignored, the mechanical friction loss of the rotating shaft 20 during high-speed rotation is extremely low, and the rotating shaft 20 does not need lubricating oil or heat dissipation of air.
A method of installing an air bearing assembly comprising the steps of:
at the starting end, a radial air bearing 21 is respectively arranged at the left side and the right side of the motor rotating shaft:
the left radial air bearing 21 is sleeved from one end of the left side of the motor rotating shaft 22, due to the characteristics of the air bearing 21, an air gap is reserved between the inner wall of the air bearing 21 and the outer wall of the motor rotating shaft 22, so that a bearing air film with enough rigidity can be continuously generated when the motor rotating shaft 22 rotates at a high speed, the air bearing 21 is sleeved when the motor rotating shaft 22 is static, and the air bearing is not required to be tightly combined with the rotating shaft when a traditional oil lubrication bearing is installed, or even a wooden hammer is used for knocking the bearing to a specific position of the rotating shaft. Then, when the non-rotating part is installed, the left radial air bearing 21 and the front bearing seat are fixedly installed;
the right radial air bearing 21 is sleeved from one end of the right side of the motor rotating shaft 22, due to the characteristics of the air bearing 21, an air gap is reserved between the inner wall of the air bearing 21 and the outer wall of the motor rotating shaft 22, so that a bearing air film with enough rigidity can be continuously generated when the rotating shaft rotates at a high speed, the air bearing 21 is sleeved when the motor rotating shaft 22 is static, and the installation of the traditional oil lubrication bearing is not required to be realized, and even a wooden hammer is used for knocking the bearing to a specific position of the rotating shaft. Then, when the non-rotating part is installed, the right radial air bearing 21 and the rear bearing seat are fixedly installed;
at the power end, a one-piece radial air bearing 24 is mounted on the outside of the hollow shaft 25 and maintains the air bearing 21 laterally between the compressor wheel 25 and the turbine wheel 26:
the integrated radial air bearing 24 and the bearing seat are fixedly installed, then the hollow shaft 25 is installed in the air bearing 21, and an air gap is reserved between the inner wall of the air bearing 21 and the outer wall of the hollow shaft 25, so that a bearing air film with enough rigidity can be continuously generated when the hollow shaft 25 rotates at a high speed, and the hollow shaft 25 is easily installed in the air bearing 21.
The compressor wheel 23 is then assembled with the hollow shaft 25 by means of a shrink fit, and finally the turbine wheel 26 is assembled with the hollow shaft 23 by means of a shrink fit.
In addition, the present embodiment is exemplified by 6 wear-resistant pieces and 6 elastic pieces, and the number thereof is not limited, and the present application protects the structure and the installation method of the present air bearing.
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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a radial air bearing of miniature gas turbine generator, its characterized in that, includes pivot (20), axle sleeve (1) has been cup jointed in pivot (20) outside, a plurality of recesses have been seted up along the circumferencial direction in axle sleeve (1) inboard, a plurality of shell fragments and anti abrasive disc have been placed between pivot (20) and axle sleeve (1).
2. The radial air bearing for a micro gas turbine generator as set forth in claim 1, wherein said elastic pieces and said wear-resistant pieces are fitted from the grooves.
3. Radial air bearing of a micro gas turbine generator according to claim 1, wherein the curvature of the plurality of resilient pieces and the anti-wear pieces matches the curvature of the sleeve (1).
4. Radial air bearing of a micro gas turbine generator according to claim 1, wherein the resilient sheet is close to the inner wall of the shaft sleeve (1) and the anti-friction sheet is close to the outer wall of the rotating shaft (20).
5. Radial air bearing for a micro gas turbine generator, according to claim 1, characterized in that said anti-abrasive discs are arranged circumferentially around the center of the rotating shaft (20) and are pressed against each other end to end in sequence.
6. An air bearing assembly provided with the air bearing assembly as recited in any one of claims 1 to 5, comprising an actuating part and a power part, wherein the actuating part and the power part are connected through a coupling;
the starting portion includes: the radial air bearings (21) are respectively arranged on two sides of the motor rotating shaft (22) in the same horizontal direction;
the power section includes: a hollow shaft (25), the exterior of the hollow shaft (25) being fitted with a one-piece radial air bearing (24); the integrated radial air bearing (24) includes: a rotating shaft provided with an air bearing (21), and a compressor impeller (23) and a turbine (26) which are positioned at two sides of the rotating shaft in the same horizontal direction.
7. A method of installing an air bearing assembly according to claim 6, comprising the steps of:
1) when the motor rotating shaft (22) is static, the radial air bearing (21) on the left side is sleeved from one end on the left side of the motor rotating shaft (22), and then the radial air bearing (21) on the left side and a front bearing seat are fixedly installed when a non-rotating part is installed;
2) when the motor rotating shaft (22) is static, the radial air bearing (21) on the right side is sleeved in from one end of the right side of the motor rotating shaft (22), and then the radial air bearing (21) on the right side and the rear bearing seat are fixedly installed when a non-rotating part is installed;
3) fixedly mounting the integrated radial air bearing (24) and the bearing seat, then installing the hollow shaft (25) into the air bearing (21), and reserving an air gap between the inner wall of the air bearing (21) and the outer wall of the hollow shaft (25);
4) the compressor impeller (23) and the hollow shaft (25) are assembled together in a cold and hot fit manner, and finally, the turbine (26) and the hollow shaft (23) are assembled together in a cold and hot fit manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910910878.1A CN110594284A (en) | 2019-09-25 | 2019-09-25 | Radial air bearing and assembly of micro gas turbine generator and installation method of radial air bearing and assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910910878.1A CN110594284A (en) | 2019-09-25 | 2019-09-25 | Radial air bearing and assembly of micro gas turbine generator and installation method of radial air bearing and assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110594284A true CN110594284A (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910910878.1A Pending CN110594284A (en) | 2019-09-25 | 2019-09-25 | Radial air bearing and assembly of micro gas turbine generator and installation method of radial air bearing and assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110594284A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040179759A1 (en) * | 2003-03-12 | 2004-09-16 | Honda Motor Co., Ltd. | Foil bearing |
| CN103688068A (en) * | 2011-08-24 | 2014-03-26 | 博格华纳公司 | Bearing arrangement |
| CN105156477A (en) * | 2015-08-29 | 2015-12-16 | 江阴吉爱倍万达精工有限公司 | Bearing of split sheet structure |
| CN206495901U (en) * | 2017-02-28 | 2017-09-15 | 李记东 | A kind of radial foil self-acting air bearing |
| CN107313962A (en) * | 2017-08-21 | 2017-11-03 | 中车株洲电机有限公司 | A kind of method for optimizing the rotor performance with foil air bearing |
| CN207906295U (en) * | 2018-03-06 | 2018-09-25 | 石家庄金士顿轴承科技有限公司 | A kind of radial foil self-acting air bearing with thick top foil structure |
-
2019
- 2019-09-25 CN CN201910910878.1A patent/CN110594284A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040179759A1 (en) * | 2003-03-12 | 2004-09-16 | Honda Motor Co., Ltd. | Foil bearing |
| CN103688068A (en) * | 2011-08-24 | 2014-03-26 | 博格华纳公司 | Bearing arrangement |
| CN105156477A (en) * | 2015-08-29 | 2015-12-16 | 江阴吉爱倍万达精工有限公司 | Bearing of split sheet structure |
| CN206495901U (en) * | 2017-02-28 | 2017-09-15 | 李记东 | A kind of radial foil self-acting air bearing |
| CN107313962A (en) * | 2017-08-21 | 2017-11-03 | 中车株洲电机有限公司 | A kind of method for optimizing the rotor performance with foil air bearing |
| CN207906295U (en) * | 2018-03-06 | 2018-09-25 | 石家庄金士顿轴承科技有限公司 | A kind of radial foil self-acting air bearing with thick top foil structure |
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Application publication date: 20191220 |