阅读说明：本技术 一种微型燃气轮发电机径向空气轴承、组件及其安装方法 (Radial air bearing and assembly of micro gas turbine generator and installation method of radial air bearing and assembly ) 是由 姜鑫平 于 2019-09-25 设计创作，主要内容包括：本发明公开了一种微型燃气轮发电机径向空气轴承、组件及其安装方法,包括转轴,所述转轴外侧套接有轴套,所述轴套内开设有凹槽,所述转轴与轴套之间放置有弹片和抗磨片,弹片和抗磨片均从凹槽处装入；当转轴高速旋转时,自主形成具有足够刚度的承载气膜将转轴抬起,并且机械摩擦损耗极低,转轴上无需润滑油,也不需要对空气进行散热,可以在满足微型燃气轮发电机的转动部件超高速转动需求的同时,使得微型燃气轮发电机转动部件的组装工艺更为方便快捷,便于实现微型燃气轮发电机的大规模工业化生产。(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.)

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.

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.