Miniature turbine power generation system suitable for high altitude and low oxygen content

Abstract

The invention relates to a miniature turbine power generation system suitable for high altitude and low oxygen content. The miniature turbine power generation system comprises an oxygen generation system, a gas compressor, a heat regenerator, a combustion chamber, a turbine and a power generator. The oxygen generation system separates oxygen-enriched gas from outside air, after the oxygen-enriched gas enters the shell, the oxygen-enriched gas is pressurized through the compressor, the pressure in the shell is increased, a bearing, a main shaft and a motor are cooled, and then the oxygen-enriched gas enters the compressor impeller to be compressed to form high-pressure oxygen-enriched gas; the heat regenerator is connected with high-pressure oxygen-enriched gas at an outlet of the gas compressor and tail gas at an outlet of the turbine, the high-pressure oxygen-enriched gas is heated through tail gas waste heat and then enters the combustion chamber, and high-temperature and high-pressure gas formed after combustion in the combustion chamber enters the turbine and then acts to generate electricity outwards. The problems that a miniature turbine power generation system is difficult to ignite, poor in operation stability and low in power generation efficiency under the high-altitude low-oxygen-content environment are solved, and the system has the advantages of being wide in operation range, stable in low-voltage ignition, reliable in operation, high in power generation efficiency and the like.

Description

Technical Field

[0001] The invention relates to a micro turbine power generation system suitable for high altitude and low oxygen content. Background Art

[0002] Micro-turbine power generation systems are increasingly used in aircraft, which often have to operate in low-pressure environments at different altitudes. This requires micro-turbine power generation systems to be able to adapt to a wider range of operating conditions, especially to be able to start and operate stably in high-altitude low-oxygen environments.

[0003] In view of the low pressure and low oxygen content of the aircraft operating environment, it is more difficult for the micro-turbine power generation system to ignite in a high-altitude environment, and the operation is also extremely unstable. At present, most of the methods to solve the difficulty of ignition of the micro-turbine power generation system rely on auxiliary means on the ground to idle the turbine and then take off. Among them, auxiliary means such as the announcement number CN110985215B discloses "an integrated starting system for a micro-turbojet engine", which uses the high-pressure gas in the high-pressure gas cylinder to assist or dominate the rotation of the micro-turbojet engine rotor; another example is the announcement number CN111734535B discloses "a correction method for high-altitude starting fuel supply of aircraft engines", which focuses on the fuel supply method of the acceleration section of the aircraft engine after the ignition is successful. The above two methods belong to ground-assisted ignition, which cannot cope with the scene where the micro-turbine is difficult to ignite at high altitudes.

[0004] During the operation of the micro-turbine power generation system, the compressor will directly inhale the low-pressure and low-oxygen air in the environment, resulting in low pressure in the combustion chamber and reduced combustion efficiency, which further leads to reduced turbine work and reduced system power generation. At the same time, low-pressure air has a poor cooling effect on the bearings used in the micro-turbine, which will lead to poor operating stability of the micro-turbine power generation system and increased failure rate.

[0005] Therefore, it is necessary to optimize and improve the pain points of the micro-turbine power generation system, such as difficult ignition and poor stability in high-altitude and low-oxygen environments. Summary of the invention

[0006] The present invention proposes a micro-turbine power generation system suitable for high-altitude low-oxygen content, which is used to solve the problems of difficult ignition, poor operating stability and low power generation efficiency of the micro-turbine power generation system in a high-altitude low-oxygen content environment. The system has the characteristics of a wide operating range, stable low-pressure ignition, reliable operation and high power generation efficiency.

[0007] The technical solution of the present invention to solve the above problems is:

[0008] On the one hand, the present invention provides a micro-turbine power generation system suitable for high altitude low oxygen content, which is special in that:

[0009] Includes oxygen production system, compressor, regenerator, combustor, turbine and generator;

[0010] The oxygen production system comprises an oxygen production module;

[0011] The compressor comprises a motor, a main shaft, a bearing, a housing, a compressor impeller and a compressor volute. The main shaft is supported by the bearing to drive the compressor impeller to rotate. The motor, the main shaft and the bearing are arranged in the housing. The compressor impeller is installed at one end of the main shaft, and the compressor impeller is located in the compressor volute, and this end is the compressor outlet. The turbine is installed at the other end of the main shaft. A compressor is arranged in the housing, and the compressor is located between the compressor impeller and the turbine.

[0012] The oxygen production system separates oxygen-rich gas from the outside air. After entering the shell, the oxygen-rich gas is first pressurized by the compressor to increase the pressure inside the shell and cool the bearings, main shaft and motor. Then, it enters the compressor impeller for compression to form high-pressure oxygen-rich gas.

[0013] The regenerator is connected to the high-pressure oxygen-rich gas at the compressor outlet and the exhaust gas at the turbine outlet, and uses the waste heat of the exhaust gas to heat the high-pressure oxygen-rich gas to form high-temperature and high-pressure oxygen-rich gas; the high-temperature and high-pressure oxygen-rich gas enters the combustion chamber, and the combustion chamber burns the high-temperature and high-pressure oxygen-rich gas to form high-temperature and high-pressure gas, which enters the turbine to perform work and generate electricity externally.

[0014] Furthermore, the bearing is a gas bearing, a magnetic bearing or a ball bearing.

[0015] Furthermore, the compressor and the air compressor share a main shaft.

[0016] On the other hand, the present invention proposes a micro-turbine power generation system suitable for high altitude low oxygen content, which is special in that it includes an oxygen production system, a compressor, a regenerator, a combustion chamber, a turbine and a generator; the oxygen production system includes a compressor and an oxygen production module;

[0017] The compressor comprises a motor, a main shaft, a bearing, a casing, a compressor impeller and a compressor volute, wherein the main shaft is supported by the bearing to drive the compressor impeller to rotate; the motor, the main shaft and the bearing are arranged in the casing; a turbine is installed at one end of the main shaft, the turbine and the compressor impeller are arranged back to back, and the compressor is located at the other end of the main shaft; the compressor compresses the external air and enters the oxygen production system, the oxygen production system separates the oxygen-rich gas, the oxygen-rich gas enters the casing to increase the pressure in the casing, and cools the bearings, the main shaft and the motor, and then enters the compressor impeller for compression to form high-pressure oxygen-rich gas; the regenerator connects the high-pressure oxygen-rich gas at the compressor outlet and the exhaust gas at the turbine outlet, and uses the waste heat of the exhaust gas to heat the high-pressure oxygen-rich gas to form high-temperature and high-pressure oxygen-rich gas; the high-temperature and high-pressure oxygen-rich gas enters the combustion chamber, the combustion chamber burns the high-temperature and high-pressure oxygen-rich gas to form high-temperature and high-pressure gas, and the high-temperature and high-pressure gas enters the turbine to perform work and generate electricity externally.

[0018] Furthermore, the bearing is a gas bearing, a magnetic bearing or a ball bearing.

[0019] Furthermore, the compressor and the air compressor share a main shaft.

[0020] On the other hand, the present invention provides a micro-turbine power generation system suitable for high altitude low oxygen content, which is special in that:

[0021] Includes oxygen production system, compressor, regenerator, combustor, turbine and generator;

[0022] The oxygen production system comprises a compressor and an oxygen production module;

[0023] The compressor comprises a motor, a main shaft, a bearing, a housing, a compressor impeller and a compressor volute, wherein the main shaft is supported by the bearing to drive the compressor impeller to rotate; the motor, the main shaft and the bearing are arranged in the housing; a turbine is installed at one end of the main shaft, the turbine and the compressor impeller are arranged back to back, and the compressor is located at the other end of the main shaft;

[0024] The oxygen production system separates oxygen-rich gas from the outside air. The oxygen-rich gas is first pressurized by the compressor, and then enters the shell to increase the pressure inside the shell, and cools the bearings, main shaft and motor. Then, it enters the compressor impeller for compression to form high-pressure oxygen-rich gas.

[0025] The regenerator is connected to the high-pressure oxygen-rich gas at the compressor outlet and the exhaust gas at the turbine outlet, and uses the waste heat of the exhaust gas to heat the high-pressure oxygen-rich gas to form high-temperature and high-pressure oxygen-rich gas; the high-temperature and high-pressure oxygen-rich gas enters the combustion chamber, and the combustion chamber burns the high-temperature and high-pressure oxygen-rich gas to form high-temperature and high-pressure gas, which enters the turbine to perform work and generate electricity externally.

[0026] Furthermore, the bearing is a gas bearing, a magnetic bearing or a ball bearing.

[0027] Furthermore, the compressor and the air compressor share a main shaft.

[0028] Advantages of the present invention:

[0029] The present invention provides a micro-turbine power generation system suitable for high-altitude low-oxygen content. The oxygen production system includes a compressor that can increase the compressor intake pressure, and can stabilize the compressor intake pressure according to different environmental pressures, so that the compressor can operate stably in a low-pressure environment, expand the operating range of the power generation system, and enhance stability; the compressor, the compressor and the turbine impeller are coaxially arranged, and the entire turbine system has a compact structure and a rapid response;

[0030] The micro-turbine power generation system suitable for high altitude and low oxygen content provided by the present invention can provide a higher pressure inside the shell, and the bearing inside the shell runs more stably, thereby increasing the stability of the power generation system;

[0031] The micro-turbine power generation system provided by the present invention is suitable for high-altitude low-oxygen content. The oxygen production system can reduce the nitrogen content entering the system, reduce the inlet flow rate of the compressor and the power consumption of the compressor, thereby increasing the power generation of the entire system;

[0032] The present invention provides a micro-turbine power generation system suitable for high altitude and low oxygen content. The oxygen production system can increase the oxygen content inside the system, and the regenerator can recover the waste heat of the exhaust gas at the turbine outlet to the oxygen-rich gas at the compressor outlet, thereby greatly improving the combustion efficiency in the combustion chamber and achieving the effect of pressurized oxygen-rich combustion, thereby increasing the turbine expansion work efficiency and the power generation efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a connection principle diagram of the high-altitude low-oxygen micro-turbine power generation system provided by the present invention suitable for integrated coupling;

[0034] Figure 2 It is a connection principle diagram of the high-altitude low-oxygen micro-turbine power generation system provided by the present invention, which is suitable for extremely low pressure and integral coupling;

[0035] Figure 3 It is another connection principle diagram suitable for integrated coupling of the high-altitude low-oxygen micro-turbine power generation system provided by the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0037] Example 1

[0038] See also Figure 1 , a micro-turbine power generation system suitable for high altitude and low oxygen content, including an oxygen production system, a compressor, a regenerator, a combustion chamber, a turbine and a generator. The oxygen production system includes an oxygen production module; the compressor includes a motor, a main shaft, a bearing, a housing, a compressor impeller and a compressor volute, and the main shaft is supported by the bearing to drive the compressor impeller to rotate. The motor, the main shaft and the bearing are arranged in the housing; the compressor impeller is installed at the left end of the main shaft, and the compressor impeller is located in the compressor volute, and this end is the compressor outlet; the turbine is installed at the right end of the main shaft; a compressor is arranged in the housing, and the compressor impeller and the compressor impeller share the main shaft.

[0039] The oxygen production module can be a device or equipment capable of separating oxygen, such as a molecular sieve or a permeable membrane. The turbine includes a turbine expansion volute and a turbine expansion impeller, the turbine expansion impeller is located in the turbine expansion volute, and the turbine expansion volute is connected to the housing.

[0040] The oxygen production module separates oxygen-rich gas from the outside air. After entering the shell, the oxygen-rich gas is first pressurized by the compressor to increase the pressure in the shell, cool the bearings, main shaft and motor, and then enters the compressor impeller for compression to form high-pressure oxygen-rich gas; the regenerator connects the high-pressure oxygen-rich gas at the compressor outlet and the exhaust gas at the turbine outlet, and uses the waste heat of the exhaust gas to heat the high-pressure oxygen-rich gas to form high-temperature and high-pressure oxygen-rich gas; the high-temperature and high-pressure oxygen-rich gas enters the combustion chamber, and the combustion chamber burns the high-temperature and high-pressure oxygen-rich gas to form high-temperature and high-pressure gas, and the high-temperature and high-pressure gas enters the turbine to perform work to generate electricity and output electrical energy to the outside, and the high-temperature and low-pressure exhaust gas at the turbine outlet enters the regenerator for waste heat recovery.

[0041] An air inlet is provided on the outer side of the compressor casing near one end of the turbine, and the air inlet is connected to the oxygen outlet of the oxygen production module. After the oxygen-rich gas enters the casing from the air inlet, it is compressed by the compressor to increase the pressure inside the casing, and cool the bearings, main shaft and motor.

[0042] The bearings, main shaft and motor can obtain better stability after being cooled by the oxygen-rich gas, and the compressor impeller only compresses the oxygen-rich gas in the casing to perform work, with a smaller flow rate and less power consumption; when the external environmental pressure is low, the compressor in the casing provides a pressure higher than the external environment and a stable flow rate for the inside of the compressor casing, and cools the bearings, main shaft and motor inside the casing to ensure that the compressor is not affected by changes in the external environmental pressure during operation and can operate stably.

[0043] Specifically, the bearing is a gas bearing, a magnetic bearing or a ball bearing or other bearing device that can support the rotation of the main shaft. The oxygen production module can be placed at the inlet of the compressor to facilitate the adjustment of the separation efficiency of the oxygen production module.

[0044] In this embodiment, the regenerator connects the compressor outlet and the combustion chamber inlet as well as the turbine outlet and the external environment. The compressor outlet gas successively absorbs the heat dissipated by the motor power generation in the casing, the heat of the bearings and the main shaft, and the heat input by the compressor work, and further absorbs the high-quality waste heat of the turbine exhaust gas in the regenerator; the regenerator makes full use of various heat generated in the system to increase the temperature of the high-pressure oxygen-rich gas at the combustion chamber inlet and further increase the turbine work, while reducing the thermal pollution generated by the exhaust gas emissions.

[0045] In this embodiment, the combustion chamber inlet is connected to the high-pressure oxygen-rich gas outlet of the regenerator, and the outlet is connected to the turbine inlet; the combustion chamber inlet is high-temperature oxygen-rich gas, and the high-temperature oxygen-rich gas and fuel have higher combustion efficiency when burning, which can make the fuel burn more completely, thereby providing a greater energy density for the turbine inlet and increasing the turbine's work efficiency.

[0046] Preferably, the turbine expansion impeller is designed for the gas state after the combustion of high-temperature oxygen-rich gas, and has higher work efficiency and power generation efficiency; the turbine expansion impeller can adapt to different environmental pressures and still maintain efficient and stable work in a low-pressure environment.

[0047] Preferably, the compressor is designed for a low-pressure inlet environment and is used in conjunction with the oxygen production module, with the main goal of providing a pressure difference for the oxygen production module and providing a higher pressure inside the compressor casing.

[0048] In this embodiment, the compressor casing contains oxygen-rich gas, and the oxygen-rich gas has a greatly reduced air flow rate compared to the air flow at the inlet of the oxygen production system, which allows the compressor to only compress the oxygen-rich gas, greatly reducing the compression work consumed and increasing the output work of the turbine; at the same time, the oxygen-rich gas can increase the combustion efficiency of the combustion chamber, further increasing the work done by the turbine; in addition, the oxygen-rich gas first cools the bearings and the main shaft and absorbs the heat dissipated by the motor for power generation, and also absorbs the waste heat of the turbine outlet exhaust in the regenerator, making full use of the heat of the entire power generation system for the turbine to generate power.

[0049] The compressor impeller of this embodiment is arranged on the main shaft of the air compressor, and the speed of the compressor can be consistent with the speed of the air compressor. The oxygen production module first inhales oxygen from the outside and then inputs the oxygen-rich gas into the compressor. The compressor compresses the oxygen-rich gas and then inputs it into the shell of the air compressor to cool the bearing. The operation mode of this embodiment is suitable for the situation where the external environmental pressure is slightly higher, and can minimize the power consumption of the compressor and the air compressor.

[0050] Example 2

[0051] See also Figure 2 , a micro-turbine power generation system suitable for high altitude and low oxygen content, including an oxygen production system, a compressor, a regenerator, a combustion chamber, a turbine and a generator. The oxygen production system includes a compressor and an oxygen production module; the compressor includes a motor, a main shaft, a bearing, a housing, a compressor impeller and a compressor volute, and the main shaft is supported by the bearing to drive the compressor impeller to rotate; the motor, the main shaft and the bearing are arranged in the housing; a turbine is installed at one end of the main shaft, and the turbine and the compressor impeller are arranged back to back, and the compressor is located at the other end of the main shaft, and the compressor impeller and the compressor impeller share the compressor main shaft. The oxygen production module can be a device or equipment that can separate oxygen, such as a molecular sieve or a permeable membrane.

[0052] The compressor compresses the outside air and enters the oxygen production module. The oxygen production module separates the oxygen-rich gas. The oxygen-rich gas increases the pressure inside the shell after entering the shell, cools the bearings, main shaft and motor, and then enters the compressor impeller for compression to form high-pressure oxygen-rich gas. The regenerator connects the high-pressure oxygen-rich gas at the compressor outlet and the exhaust gas at the turbine outlet, and uses the waste heat of the exhaust gas to heat the high-pressure oxygen-rich gas to form high-temperature and high-pressure oxygen-rich gas; the high-temperature and high-pressure oxygen-rich gas enters the combustion chamber, and the combustion chamber burns the high-temperature and high-pressure oxygen-rich gas to form high-temperature and high-pressure gas. The high-temperature and high-pressure gas enters the turbine to generate power externally.

[0053] An air inlet is provided on the outer side of the compressor shell near one end of the compressor, and the air inlet is connected to the oxygen outlet of the oxygen production module. After the oxygen-rich gas enters the shell from the air inlet, the pressure inside the shell is increased and the bearings, main shaft and motor are cooled.

[0054] The difference between this embodiment and embodiment 1 is that the turbine and compressor impeller are arranged back to back, and the compressor is arranged at the other end of the main shaft. The operation mode of this embodiment can minimize the damage to the bearing caused by the heat generated when the turbine is working, which helps to improve the stability of the system.

[0055] Example 3

[0056] See also Figure 3 , a micro-turbine power generation system suitable for high altitude and low oxygen content, including an oxygen production system, a compressor, a regenerator, a combustion chamber, a turbine and a generator. The oxygen production system includes a compressor and an oxygen production module; the compressor includes a motor, a main shaft, a bearing, a housing, a compressor impeller and a compressor volute, and the main shaft is supported by the bearing to drive the compressor impeller to rotate; the motor, the main shaft and the bearing are arranged in the housing; a turbine is installed at one end of the main shaft, and the turbine and the compressor impeller are arranged back to back, and the compressor is located at the other end of the main shaft, and the compressor impeller and the compressor impeller share the compressor main shaft. The oxygen production module can be a device or equipment that can separate oxygen, such as a molecular sieve or a permeable membrane.

[0057] An air inlet is provided on the outer side of the compressor casing near one end of the compressor, and the oxygen production module separates oxygen-rich gas from the outside air. The oxygen-rich gas is first pressurized by the compressor, and then enters the casing to increase the pressure inside the casing, and cools the bearings, main shaft and motor, and then enters the compressor impeller for compression to form high-pressure oxygen-rich gas; the regenerator is connected to the high-pressure oxygen-rich gas at the compressor outlet and the exhaust gas at the turbine outlet, and the waste heat of the exhaust gas is used to heat the high-pressure oxygen-rich gas to form high-temperature and high-pressure oxygen-rich gas; the high-temperature and high-pressure oxygen-rich gas enters the combustion chamber, and the combustion chamber burns the high-temperature and high-pressure oxygen-rich gas to form high-temperature and high-pressure gas, and the high-temperature and high-pressure gas enters the turbine to perform work and generate electricity externally.

[0058] The difference between this embodiment and embodiment 2 is that the oxygen production module is arranged at the inlet of the compressor, which helps to reduce heat conduction and power consumption of the compressor.

[0059] In summary, the micro-turbine power generation system suitable for high altitude and low oxygen content provided by the present invention uses an oxygen production system to reduce the nitrogen content in the system, and increases the pressure in the compressor casing and the oxygen content of the system. The increase in casing pressure better cools the bearings and increases the stability of compressor operation. The increase in oxygen and the reduction in nitrogen in the system reduce the power consumption of the compressor compressed working fluid and improve the combustion efficiency of the combustion chamber. The regenerator increases the intake temperature of the combustion chamber, further increases the intake temperature of the turbine and increases the external work and power generation of the turbine, while recovering the high temperature of the turbine outlet exhaust and reducing the thermal emission pollution of the power generation system. Since the oxygen production system arranged in front of the compressor provides the compressor casing with a higher pressure than the external environment, it ensures that the turbine system can operate stably even in a low-pressure environment.

[0060] The above descriptions are merely embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related system fields, are also included in the protection scope of the present invention.

Claims

1. A micro-turbine power generation system suitable for high altitude low oxygen content, characterized by: Includes oxygen production system, compressor, regenerator, combustor, turbine and generator; The oxygen production system comprises an oxygen production module; The compressor comprises a motor, a main shaft, a bearing, a housing, a compressor impeller and a compressor volute. The main shaft is supported by the bearing to drive the compressor impeller to rotate. The motor, the main shaft and the bearing are arranged in the housing. The compressor impeller is installed at one end of the main shaft, and the compressor impeller is located in the compressor volute, and this end is the compressor outlet. The turbine is installed at the other end of the main shaft. A compressor is arranged in the housing, and the compressor is located between the compressor impeller and the turbine. The oxygen production system separates oxygen-rich gas from the outside air. After entering the shell, the oxygen-rich gas is first pressurized by the compressor to increase the pressure inside the shell and cool the bearings, main shaft and motor. Then, it enters the compressor impeller for compression to form high-pressure oxygen-rich gas. The regenerator is connected to the high-pressure oxygen-rich gas at the compressor outlet and the exhaust gas at the turbine outlet, and uses the waste heat of the exhaust gas to heat the high-pressure oxygen-rich gas to form high-temperature and high-pressure oxygen-rich gas; the high-temperature and high-pressure oxygen-rich gas enters the combustion chamber, and the combustion chamber burns the high-temperature and high-pressure oxygen-rich gas to form high-temperature and high-pressure gas, which enters the turbine to perform work and generate electricity externally.

2. A micro-turbine power generation system suitable for high altitude and low oxygen content according to claim 1, characterized in that: The bearing is a gas bearing, a magnetic bearing or a ball bearing.

3. The micro-turbine power generation system suitable for high altitude and low oxygen content according to claim 1 is characterized in that: The compressor and the air compressor share a main shaft.

4. A micro-turbine power generation system suitable for high altitude low oxygen content, characterized by: Includes oxygen production system, compressor, regenerator, combustor, turbine and generator; The oxygen production system comprises a compressor and an oxygen production module; The compressor comprises a motor, a main shaft, a bearing, a housing, a compressor impeller and a compressor volute, wherein the main shaft is supported by the bearing to drive the compressor impeller to rotate; the motor, the main shaft and the bearing are arranged in the housing; a turbine is installed at one end of the main shaft, the turbine and the compressor impeller are arranged back to back, and the compressor is located at the other end of the main shaft; The compressor compresses the outside air and enters the oxygen production system. The oxygen production system separates the oxygen-rich gas. The oxygen-rich gas enters the shell to increase the pressure inside the shell, cool the bearings, main shaft and motor, and then enters the compressor impeller to be compressed to form high-pressure oxygen-rich gas. The regenerator is connected to the high-pressure oxygen-rich gas at the compressor outlet and the exhaust gas at the turbine outlet, and uses the waste heat of the exhaust gas to heat the high-pressure oxygen-rich gas to form high-temperature and high-pressure oxygen-rich gas; the high-temperature and high-pressure oxygen-rich gas enters the combustion chamber, and the combustion chamber burns the high-temperature and high-pressure oxygen-rich gas to form high-temperature and high-pressure gas, which enters the turbine to perform work and generate electricity externally.

5. A micro-turbine power generation system suitable for high altitude low oxygen content according to claim 4, characterized in that: The bearing is a gas bearing, a magnetic bearing or a ball bearing.

6. A micro-turbine power generation system suitable for high altitude and low oxygen content according to claim 5, characterized in that: The compressor and the air compressor share a main shaft.

7. A micro-turbine power generation system suitable for high altitude low oxygen content, characterized by: Includes oxygen production system, compressor, regenerator, combustor, turbine and generator; The oxygen production system comprises a compressor and an oxygen production module; The compressor comprises a motor, a main shaft, a bearing, a housing, a compressor impeller and a compressor volute, wherein the main shaft is supported by the bearing to drive the compressor impeller to rotate; the motor, the main shaft and the bearing are arranged in the housing; a turbine is installed at one end of the main shaft, the turbine and the compressor impeller are arranged back to back, and the compressor is located at the other end of the main shaft; The oxygen production system separates oxygen-rich gas from the outside air. The oxygen-rich gas is first pressurized by the compressor, and then enters the shell to increase the pressure inside the shell, and cools the bearings, main shaft and motor. Then, it enters the compressor impeller for compression to form high-pressure oxygen-rich gas. The regenerator is connected to the high-pressure oxygen-rich gas at the compressor outlet and the exhaust gas at the turbine outlet, and uses the waste heat of the exhaust gas to heat the high-pressure oxygen-rich gas to form high-temperature and high-pressure oxygen-rich gas; the high-temperature and high-pressure oxygen-rich gas enters the combustion chamber, and the combustion chamber burns the high-temperature and high-pressure oxygen-rich gas to form high-temperature and high-pressure gas, which enters the turbine to perform work and generate electricity externally.

8. The micro-turbine power generation system suitable for high altitude and low oxygen content according to claim 7 is characterized in that: The bearing is a gas bearing, a magnetic bearing or a ball bearing.

9. The micro-turbine power generation system suitable for high altitude and low oxygen content according to claim 7, characterized in that: The compressor and the air compressor share a main shaft.

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