CN113898670A - Gas path system for gas bearing and micro gas turbine - Google Patents

Gas path system for gas bearing and micro gas turbine Download PDF

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Publication number
CN113898670A
CN113898670A CN202111145858.3A CN202111145858A CN113898670A CN 113898670 A CN113898670 A CN 113898670A CN 202111145858 A CN202111145858 A CN 202111145858A CN 113898670 A CN113898670 A CN 113898670A
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China
Prior art keywords
gas
bearing
source
path
air
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CN202111145858.3A
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Chinese (zh)
Inventor
靳普
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Liu Muhua
Yongxu Tengfeng New Energy Power Technology Beijing Co ltd
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Yongxu Tengfeng New Energy Power Technology Beijing Co ltd
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Priority to CN202111145858.3A priority Critical patent/CN113898670A/en
Publication of CN113898670A publication Critical patent/CN113898670A/en
Priority to PCT/CN2022/116636 priority patent/WO2023051159A1/en
Pending legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/06—Arrangements of bearings; Lubricating
    • 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
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • 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
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F16C17/08—Sliding-contact bearings for exclusively rotary movement for axial load only for supporting the end face of a shaft or other member, e.g. footstep bearings
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/02—Pipe-line systems for gases or vapours
    • F17D1/065—Arrangements for producing propulsion of gases or vapours
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/20—Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

The invention discloses a gas path system for a gas bearing, which comprises a gas source gas path, a gas supplementing gas path, a bearing gas path and a buffer tank, wherein the input end of the bearing gas path is communicated with the buffer tank, and the output end of the bearing gas path is communicated with the gas bearing; the input end of the gas source gas circuit is communicated with an external gas source, the output end of the gas source gas circuit is communicated with the buffer tank, and the gas source gas circuit is used for supplying gas to the gas bearing through the buffer tank when the gas bearing is in a static pressure working mode or is switched from a dynamic pressure working mode to the static pressure working mode; the input end of the air supply circuit is communicated with an air supply source, the output end of the air supply circuit is communicated with the buffer tank, and the air supply circuit is used for supplying air to the air bearing through the buffer tank when the air bearing is switched from a static pressure working mode to a dynamic pressure working mode. The invention also discloses a micro gas turbine comprising the gas path system. The gas circuit system provided by the invention can realize the stable switching of the gas bearing from a static pressure working state to a dynamic pressure working state by arranging the buffer tank and the air supply circuit, and ensures the stability of the working state of the rotor.

Description

Gas path system for gas bearing and micro gas turbine
Technical Field
The invention relates to a gas circuit system for a gas bearing and a micro gas turbine comprising the gas circuit system, belonging to the technical field of bearings.
Background
The micro gas turbine uses continuously flowing gas as working medium to drive the impeller to rotate at high speed, and converts the energy of fuel into useful work, and is a rotary impeller type heat engine. The air compressor sucks air from the external atmospheric environment, compresses the air to pressurize the air, and simultaneously improves the air temperature correspondingly; compressed air is pumped into a combustion chamber and is mixed with injected fuel to be combusted to generate high-temperature and high-pressure gas; then the gas or liquid fuel enters a turbine to do work through expansion, the turbine is pushed to drive the gas compressor and the external load rotor to rotate at a high speed, the chemical energy of the gas or liquid fuel is partially converted into mechanical work, and the mechanical work can be output by connecting a generator.
When the rotor rotates at a high speed, the rotor is subjected to a force in the radial direction and a force in the axial direction. In order to limit the radial and axial movement of the rotating shaft, a radial bearing and a thrust bearing are required to be installed in the rotor system. The traditional radial bearing and the thrust bearing are both common contact type bearings, and along with the increase of the rotating speed of the rotor, especially when the rotating speed of the rotor exceeds 40000 revolutions per minute, the common contact type bearings cannot meet the requirement of the working rotating speed due to the existence of large mechanical abrasion. Therefore, researchers have proposed replacing the original mechanical bearings with non-contact bearings, the most representative of which are gas bearings.
The gas bearing (also called an air bearing) refers to a bearing using gas (usually air, but other gases are possible) as a lubricant, and the gas bearing adopts a non-contact supporting mode, and supplies air to a bearing gap through a throttling hole, so that a lubricating gas film with certain bearing and rigidity is formed in the gap, and the influence of friction force on the rotating speed of a motor spindle can be reduced. The compressor and the turbine are both required to be mounted on the main shaft through gas bearings, so the operation stability of the gas bearings determines the operation stability of the whole unit.
In the related art, the gas bearing can support a static pressure working state and a dynamic pressure working state, wherein the static pressure working state refers to that gas is supplied to the gas bearing through an external gas source, the bearing blows gas to the surface of the shaft through a throttling hole so as to form a lubricating gas film with certain bearing and rigidity in a gap between the bearing and the surface of the shaft, and the external gas source is required to supply gas continuously in the working process. The dynamic pressure working state means that when the micro gas turbine runs to reach a certain rotating speed, a gas lubricating film is formed by utilizing the tangential motion of the surface of the gas bearing, so that an external gas source is not needed to continuously supply gas, and only gas supply is needed before the rotating speed of the gas turbine reaches a preset rotating speed in the starting stage, so that the service life of external gas source equipment can be prolonged. However, at the moment of switching the dynamic and static pressure states of the gas bearing, the gas film form fluctuates, which affects the stability. Therefore, it is necessary to develop a solution to the problem of fluctuation in the "gas film form" at the moment of performing the switching of the dynamic and static pressure states of the gas bearing.
Disclosure of Invention
In view of the above prior art, the present invention provides a gas path system for a gas bearing, and a micro gas turbine including the gas path system. The invention supplies gas for the gas bearing by providing the gas path system with the buffer tank and the gas supply path so as to ensure the stability of the gas film during the dynamic and static pressure switching.
The invention is realized by the following technical scheme:
a gas path system for a gas bearing comprises a gas source gas path, a gas supplementing gas path, a bearing gas path and a buffer tank, wherein the input end of the bearing gas path is communicated with the buffer tank, and the output end of the bearing gas path is communicated with the gas bearing;
the input end of the gas source gas circuit is communicated with an external gas source, the output end of the gas source gas circuit is communicated with the buffer tank, and the gas source gas circuit is used for supplying gas to the gas bearing through the buffer tank when the gas bearing is in a static pressure working mode or is switched from a dynamic pressure working mode to the static pressure working mode;
the input end of the air supply circuit is communicated with an air supply source, the output end of the air supply circuit is communicated with the buffer tank, and the air supply circuit is used for supplying air to the air bearing through the buffer tank when the air bearing is switched from a static pressure working mode to a dynamic pressure working mode.
Further, the buffer tank is a rigid tank body or an elastic tank body; the elastic tank body has a self-adjusting function, and can offset pressure fluctuation in an expansion and contraction mode to enhance the buffering effect.
Furthermore, an electromagnetic valve is arranged on the air source air path to control the opening and closing and the flow of the air path.
Furthermore, an electromagnetic valve is arranged on the air supply path to control the opening and closing and the flow of the air path.
Further, the external gas source is selected from any one of a screw pump, a piston pump or a centrifugal pump.
Further, the air supply source is selected from any one of a screw pump, a piston pump or a centrifugal pump.
Further, when the gas path system of the invention is applied to a gas turbine, the gas supply source can be a gas compressor of the gas turbine, and the input end of the gas supply path is communicated with the outlet of the gas compressor.
Further, the number of the gas bearings is two or more; the gas bearing is a radial bearing, a thrust bearing or a radial thrust integrated bearing with the same gas inlet.
Furthermore, the bearing gas circuit comprises more than two branches, and the number of the branches corresponds to the number of the gas bearings.
The control method for the gas path system of the gas bearing comprises the following steps:
when the gas bearing is in a static pressure working mode, an external gas source supplies gas: pressure gas of an external gas source is introduced into the buffer tank for buffering, and then is distributed to the gas bearings through the buffer tank and the bearing gas circuit;
when the gas bearing is switched from a static pressure working mode to a dynamic pressure working mode, the gas supplementing gas circuit is controlled to be opened firstly, the gas is supplied to the buffer tank by the gas supplementing source, and then the external gas source is controlled to stop supplying gas or the gas circuit of the gas source is controlled to be closed.
A micro gas turbine comprises the gas path system for the gas bearing.
In the prior art, when the gas bearing is switched from a static pressure working state to a dynamic pressure working state, because an external gas source stops supplying gas suddenly, the pressure in a gas path is reduced suddenly, and the gas of a gas film can flow to the gas path, so that the phenomenon that the gas path is exhausted from the gas film is formed, the form of the gas film is fluctuated, and the stability of the working state of the rotor is disturbed. The gas circuit system of the invention can realize the stable switching of the gas bearing from the static pressure working state to the dynamic pressure working state by arranging the buffer tank and the air supply gas circuit, and ensures the stability of the working state of the rotor: on one hand, the buffer tank can store relatively more gas to maintain pressure due to the volume of the buffer tank being larger than that of the gas circuit, and the phenomenon of gas extraction from the gas film can be weakened to a certain extent; on the other hand, the air supply gas circuit supplies gas into the buffer tank in the switching process, so that the gas quantity and pressure in the buffer tank are further kept, and air suction from the gas film is avoided as much as possible, the fluctuation of the gas film form during switching is avoided as much as possible, and the stability of the gas film is kept.
The gas circuit system is provided with the buffer tank, the buffer tank can limit and maintain certain pressure, and can alleviate the pressure fluctuation of gas entering the buffer tank, so that the pressure of the gas going out of the buffer tank is kept as stable as possible. By arranging the buffer tank and the air supply path, the invention limits the fluctuation of the air film shape to the maximum extent when the air bearing is switched from a static pressure working state to a dynamic pressure working state, and can ensure the stability of the air film, thereby realizing stable switching and ensuring the stability of the working state of the rotor. The invention can arrange the electromagnetic valves on the air source path and the air supply path to control the opening and closing of the air paths, and the bearing air path (including each branch) is not required to be provided with the electromagnetic valves, thereby saving the number of the electromagnetic valves, saving the cost and being convenient for maintenance.
The various terms and phrases used herein have the ordinary meaning as is well known to those skilled in the art. To the extent that the terms and phrases are not inconsistent with known meanings, the meaning of the present invention will prevail.
Drawings
FIG. 1: the gas path system for the gas bearing is schematically structured.
FIG. 2: the structure of the gas path system for the gas bearing is schematically shown (the gas bearing is a gas bearing group).
FIG. 3: the invention discloses a schematic diagram of a control method of a gas circuit system.
100, a gas bearing; 200. a buffer tank; 300. an external gas source; 400. a gas source for supplementing gas; 1. a rotating shaft; 2. a generator; 3. a turbine; 110. a first radial bearing; 120. a thrust bearing; 130. a second radial bearing; A. an air source air path; B. a gas supplementing circuit; C. a bearing gas circuit; c1, a branch gas path I; c2, a branch gas path II; c3 and a branch gas path III.
Detailed Description
The present invention will be further described with reference to the following examples. However, the scope of the present invention is not limited to the following examples. It will be understood by those skilled in the art that various changes and modifications may be made to the invention without departing from the spirit and scope of the invention.
Example 1
An air path system for a gas bearing 100 comprises an air source air path A, an air supply air path B, a bearing air path C and a buffer tank 200, as shown in fig. 1, wherein the input end of the bearing air path C is communicated with the buffer tank 200, and the output end is communicated with the gas bearing 100.
The input end of the air source air path A is communicated with an external air source 300, the output end of the air source air path A is communicated with the buffer tank 200, and the air source air path A is used for supplying air to the air bearing 100 through the buffer tank 200 when the air bearing 100 is in a static pressure working mode or is switched to the static pressure working mode from a dynamic pressure working mode.
The input end of the air supply circuit B is communicated with the air supply source 400, the output end of the air supply circuit B is communicated with the buffer tank 200, and the air supply circuit B is used for supplying air to the air bearing 100 through the buffer tank 200 when the air bearing 100 is switched from a static pressure working mode to a dynamic pressure working mode.
The buffer tank 200 can be a rigid tank body, at the moment, the buffer tank 200 does not have a self-adjusting function, the buffer tank has a buffer stabilizing function only by depending on the gas capacity, and the gas film stability in the dynamic and static pressure switching process is realized by matching with the gas supplementing circuit B.
The buffer tank 200 may also be an elastic tank body, and at this time, the buffer tank 200 has a self-adjusting function, so that pressure fluctuation can be counteracted in an expansion and contraction manner, and the buffering effect is enhanced.
And the air source air path A and the air supply air path B can be provided with electromagnetic valves to control the opening and closing and the flow of the air paths.
The external gas source 300 is selected from any one of a screw pump, a piston pump, or a centrifugal pump.
The air supply source 400 is selected from any one of a screw pump, a piston pump or a centrifugal pump. The pressure requirements and stability requirements of the make-up gas source 400 may be lower than the gas source 300. The make-up air source 400 may also be selected from a compressor (when the air path system of the embodiment is applied to a gas turbine), and an input end of the make-up air path is communicated with an outlet of the compressor.
The number of the gas bearings 100 may be more than two, and the gas bearings 100 may be radial bearings, thrust bearings or radial-thrust integrated bearings with the same gas inlet, for example, a gas bearing set composed of two radial bearings (a first radial bearing 110, a second radial bearing 130) and two thrust bearings 120, as shown in fig. 2; correspondingly, the bearing air passage C may include a plurality of branches (as shown in fig. 2, three branches including a branch air passage ic 1, a branch air passage ic 2, and a branch air passage iiic 3, where the branch air passage ic 1 is communicated with the first radial bearing 110, the branch air passage ic 2 is communicated with the thrust bearing 120, and the branch air passage ic 3 is communicated with the second radial bearing 130), and the number of the branches corresponds to the number of the gas bearings. Therefore, the electromagnetic valves can be arranged only on the air source air path A and the air supply air path B, and the electromagnetic valves do not need to be arranged on the bearing air path C (comprising all branches), so that the number of the electromagnetic valves is reduced, the cost is saved, and the maintenance is convenient.
Example 2
A control method of the gas circuit system (embodiment 1) for the gas bearing 100, as shown in fig. 3, includes the following steps:
step S1: when the gas bearing 100 is in the static pressure operating mode, the external gas source 300 supplies gas (the solenoid valve on the gas source gas circuit a is opened, and the solenoid valve on the gas supply gas circuit B is closed): the pressure gas of the external gas source 300 is introduced into the buffer tank 200 for buffering, and then is distributed to the gas bearing 100 through the buffer tank 200 via the bearing gas circuit C;
at this time, since the high-pressure gas supplied from the external gas source 300 is several times of the standard atmospheric pressure, the gas film of the gas bearing 100 has a certain pressure, and the gas bearing 100 is in a static pressure operating state.
Step S2: when the gas bearing 100 is switched from the static pressure working mode to the dynamic pressure working mode, the gas supplementing gas circuit B is controlled to be opened, gas is supplied to the buffer tank 200 from the gas supplementing gas source 400 (the electromagnetic valve on the gas supplementing gas circuit B is controlled to be opened) (after pressure gas of the gas supplementing gas source 400 is introduced into the buffer tank 200 for buffering, the pressure gas is distributed to the gas bearing 100 through the buffer tank 200 via the bearing gas circuit C), and then the external gas source 300 is controlled to stop supplying gas or the gas source gas circuit a is controlled to be closed (the external gas source 300 is shut down, or the electromagnetic valve on the gas source gas circuit a is closed);
at this time, because the external air source 300 stops supplying air suddenly, the pressure in the air path is reduced suddenly, and the air in the air film flows to the air path, so that the phenomenon that the air path extracts air from the air film is formed, the shape of the air film is fluctuated, and the stability of the working state of the rotor is disturbed;
however, the arrangement of the invention can realize the stable switching of the gas bearing from the static pressure working state to the dynamic pressure working state, and ensure the stability of the working state of the rotor: on one hand, the buffer tank 200 can store relatively more gas to maintain pressure due to the volume larger than the gas path, and can weaken the phenomenon of air suction from the gas film to a certain extent; on the other hand, the air supplementing gas circuit B supplements gas into the buffer tank 200 in the switching process, further keeps the gas quantity and pressure in the buffer tank 200, and further avoids air suction from the gas film as much as possible, so that the fluctuation of the gas film form during switching is avoided as much as possible, and the stability of the gas film is kept.
Step S3: when the gas bearing 100 stops working, the external gas source 300 supplies gas, and the gas supply source 400 stops supplying gas;
at the moment, the gas bearing is in a static pressure working state, and due to the existence of the buffer tank, the gas film form of the gas bearing cannot fluctuate obviously due to the change of the gas source pressure, so that the gas bearing can be ensured to stop working stably.
Example 3
A micro gas turbine, as shown in fig. 2, includes the gas path system for gas bearing of embodiment 1, a rotating shaft 1, and a compressor, a turbine 3, a gas bearing and a generator 2 arranged on the rotating shaft 1, wherein the compressor is used as a make-up gas source 400, and an input end of a make-up gas path B is communicated with an outlet of the compressor.
The gas bearing 100 is a gas bearing set consisting of two radial bearings (a first radial bearing 110, a second radial bearing 130) and two thrust bearings 120, as shown in fig. 2; correspondingly, the bearing air passage C comprises three branches including a branch air passage ic 1, a branch air passage ic 2 and a branch air passage iiic 3, the branch air passage ic 1 is communicated with the first radial bearing 110, the branch air passage ic 2 is communicated with the thrust bearing 120, and the branch air passage iiic 3 is communicated with the second radial bearing 130.
Although the specific embodiments of the present invention have been described with reference to the examples, the scope of the present invention is not limited thereto, and those skilled in the art will appreciate that various modifications and variations can be made without inventive effort by those skilled in the art based on the technical solution of the present invention.

Claims (10)

1. A gas circuit system for a gas bearing, characterized by: the gas bearing comprises a gas source gas path, a gas supplementing gas path, a bearing gas path and a buffer tank, wherein the input end of the bearing gas path is communicated with the buffer tank, and the output end of the bearing gas path is communicated with a gas bearing;
the input end of the gas source gas circuit is communicated with an external gas source, the output end of the gas source gas circuit is communicated with the buffer tank, and the gas source gas circuit is used for supplying gas to the gas bearing through the buffer tank when the gas bearing is in a static pressure working mode or is switched from a dynamic pressure working mode to the static pressure working mode;
the input end of the air supply circuit is communicated with an air supply source, the output end of the air supply circuit is communicated with the buffer tank, and the air supply circuit is used for supplying air to the air bearing through the buffer tank when the air bearing is switched from a static pressure working mode to a dynamic pressure working mode.
2. The gas path system for a gas bearing of claim 1, wherein: the buffer tank is a rigid tank body or an elastic tank body.
3. The gas path system for a gas bearing of claim 1, wherein: the gas source gas circuit is provided with an electromagnetic valve; and the air supply path is provided with an electromagnetic valve.
4. The gas path system for a gas bearing of claim 1, wherein: the external air source is selected from any one of a screw pump, a piston pump or a centrifugal pump, and the air supply source is selected from any one of a screw pump, a piston pump or a centrifugal pump.
5. The gas path system for a gas bearing of claim 1, wherein: the external air source is selected from any one of a screw pump, a piston pump or a centrifugal pump; the air supply source is selected from an air compressor, and the input end of the air supply path is communicated with the outlet of the air compressor.
6. The gas path system for a gas bearing of claim 1, wherein: the number of the gas bearings is more than two; the gas bearing is a radial bearing, a thrust bearing or a radial thrust integrated bearing with the same gas inlet.
7. The gas path system for a gas bearing of claim 6, wherein: the bearing gas circuit comprises more than two branches, and the number of the branches corresponds to that of the gas bearings.
8. The gas path system for a gas bearing of claim 6, wherein: the gas bearing is a gas bearing group consisting of two first radial bearings, a second radial bearing and two thrust bearings;
the bearing gas path comprises three branches, namely a branch gas path I, a branch gas path II and a branch gas path III, wherein the branch gas path I is communicated with the first radial bearing, the branch gas path II is communicated with the thrust bearing, and the branch gas path III is communicated with the second radial bearing;
the air supply source is a compressor, and the input end of the air supply path is communicated with the outlet of the compressor.
9. The control method for the gas circuit system for the gas bearing as recited in any one of claims 1 to 8, wherein: the method comprises the following steps:
when the gas bearing is in a static pressure working mode, an external gas source supplies gas: pressure gas of an external gas source is introduced into the buffer tank for buffering, and then is distributed to the gas bearings through the buffer tank and the bearing gas circuit;
when the gas bearing is switched from a static pressure working mode to a dynamic pressure working mode, the gas supplementing gas circuit is controlled to be opened firstly, the gas is supplied to the buffer tank by the gas supplementing source, and then the external gas source is controlled to stop supplying gas or the gas circuit of the gas source is controlled to be closed.
10. A micro gas turbine comprising the gas path system for a gas bearing of any one of claims 1 to 8.
CN202111145858.3A 2021-09-28 2021-09-28 Gas path system for gas bearing and micro gas turbine Pending CN113898670A (en)

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CN202111145858.3A CN113898670A (en) 2021-09-28 2021-09-28 Gas path system for gas bearing and micro gas turbine
PCT/CN2022/116636 WO2023051159A1 (en) 2021-09-28 2022-09-01 Gas path system for gas bearing, and microturbine

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Application Number Priority Date Filing Date Title
CN202111145858.3A CN113898670A (en) 2021-09-28 2021-09-28 Gas path system for gas bearing and micro gas turbine

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115076235A (en) * 2022-06-07 2022-09-20 郑州轻工业大学 Static pressure gas bearing device
WO2023051159A1 (en) * 2021-09-28 2023-04-06 永旭腾风新能源动力科技（北京）有限公司 Gas path system for gas bearing, and microturbine

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CN111664181A (en) * 2020-07-10 2020-09-15 大唐环境产业集团股份有限公司 Novel air suspension bearing protection system
CN112096740B (en) * 2020-09-14 2022-05-20 华海清科股份有限公司 Air supply system for air bearing and grinding tool
CN216382246U (en) * 2021-09-28 2022-04-26 永旭腾风新能源动力科技（北京）有限公司 Gas path system for gas bearing and micro gas turbine
CN113898670A (en) * 2021-09-28 2022-01-07 永旭腾风新能源动力科技（北京）有限公司 Gas path system for gas bearing and micro gas turbine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023051159A1 (en) * 2021-09-28 2023-04-06 永旭腾风新能源动力科技（北京）有限公司 Gas path system for gas bearing, and microturbine
CN115076235A (en) * 2022-06-07 2022-09-20 郑州轻工业大学 Static pressure gas bearing device
CN115076235B (en) * 2022-06-07 2024-04-16 郑州轻工业大学 Static pressure gas bearing device

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