CN216767484U

CN216767484U - Gas power generation device

Info

Publication number: CN216767484U
Application number: CN202220735638.XU
Authority: CN
Inventors: 孙耕
Original assignee: Beijing Dazhen Technology Co ltd
Current assignee: Beijing Dazhen Technology Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-06-17
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses a gas power generation device, comprising: a bearing; the rotating shaft penetrates through the bearing, and a turbine coaxially fixed with the rotating shaft is arranged on the rotating shaft; the generator assembly comprises a motor magnetic rotor arranged on the rotating shaft and a motor stator sleeved outside the rotating shaft, and the motor stator is matched with the motor magnetic rotor in position; a gas inlet conduit communicating with a region between the bearing and the shaft and for conveying gas towards the turbine to drive rotation of the turbine; and the gas outlet pipeline is communicated with the area between the bearing and the rotating shaft and is used for discharging gas after the turbine is driven to rotate. The gas drives the turbine to rotate, so that the magnetic rotor of the motor rotates relative to the stator of the motor, and the pressure energy of the gas is converted into electric energy.

Description

Gas power generation device

Technical Field

The utility model belongs to the field of natural gas power generation, and particularly relates to a gas power generation device.

Background

With the rapid development of economy in China, the demand of natural gas is increasing day by day, and in order to improve the efficiency of natural gas pipeline transportation, the natural gas of a natural gas pipeline network always maintains higher pressure in the pipeline transportation process, wherein the pressure is generally about 10MPa and is far higher than the pressure of urban users by 0.4 MPa. Because the traditional pressure regulating valve device can not realize energy recovery, a large amount of waste is caused. Therefore, if the pressure energy in the natural gas can be recycled and the expander is matched with a power generation system to convert the pressure energy into electric energy, the recycling of the part of the pressure energy can not only generate remarkable economic benefit, but also eliminate the noise and equipment damage hidden danger in the natural gas pressure regulating process, and has important practical significance. In addition to the recovery of pressure energy from natural gas, there are also situations where various waste gases are produced in the existing society.

At present, expanders in the pressure energy recovery process are mainly star rotary motors and screw expanders. The star rotary pneumatic motor generally adopts a full rolling bearing rotor structure, but generally needs to replace a wear part more than one year. Screw expanders require oil lubrication and are inefficient.

For example, CN105927294A discloses an exhaust turbine power generation device, which includes a turbine assembly, a bearing system and a generator assembly, wherein a heat shield of the turbine assembly is disposed between the turbine assembly and the bearing system assembly; the bearing system comprises a rotating shaft, a radial bearing and a thrust bearing, wherein the rotating shaft comprises a first shaft section and a second shaft section which are integrated, the diameter of the first shaft section is larger than that of the second shaft section, one end of the first shaft section is fixedly connected with the turbine impeller, and the first shaft section is arranged in a bearing body through the radial bearing; one end of the second shaft section is arranged in the bearing body through a thrust bearing; the generator rotor is fixedly sleeved on the second shaft section. Although the waste gas of the engine can be recycled and converted into electric energy for the use of the engine or the electrical elements of the vehicle; the thrust bearing and the thrust plate jointly play a role in balancing axial force; the problems of lubricating oil sealing, axial force balance and the like are well solved. However, the method of filling lubricating oil is still adopted, so that the abrasion condition is easy to occur when the rotating shaft rotates, and the energy conversion efficiency of the oil lubrication method is relatively low.

Therefore, how to provide a technical scheme for recovering gas pressure energy and reducing abrasion degree is a technical problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, the present invention provides a gas power generation apparatus, which can convert pressure energy of gas into electric energy and reduce the degree of wear of a rotating shaft and a bearing.

In a first aspect, the present invention provides a gas power plant comprising:

a bearing;

the rotating shaft penetrates through the bearing, and a turbine coaxially fixed with the rotating shaft is arranged on the rotating shaft;

the generator assembly comprises a motor magnetic rotor arranged on the rotating shaft and a motor stator sleeved outside the rotating shaft, and the motor stator is matched with the motor magnetic rotor in position;

a gas inlet conduit communicating with a region between the bearing and the shaft and for conveying gas towards the turbine to drive rotation of the turbine;

and the gas outlet pipeline is communicated with the area between the bearing and the rotating shaft and is used for discharging gas after the turbine is driven to rotate.

The gas inlet pipeline comprises a bearing gas inlet pipeline and a turbine gas inlet pipeline, the bearing gas inlet pipeline is communicated with a region between the bearing and the rotating shaft, and the turbine gas inlet pipeline is used for conveying gas towards the turbine;

the gas outlet comprises a bearing gas exhaust port pipeline and a turbine gas exhaust port pipeline, the bearing gas exhaust port pipeline is communicated with a region between the bearing and the rotating shaft, and the turbine gas exhaust port pipeline is used for discharging and driving gas after the turbine rotates.

The gas power generation device comprises turbine volutes, the number of the turbine volutes is the same as that of the turbines, a first accommodating cavity for accommodating the turbines is arranged in each turbine volute, the gas inlet pipeline comprises an inlet pipe communicated with the first accommodating cavity, and the gas outlet pipeline comprises an outlet pipe communicated with the first accommodating cavity and the turbines.

The gas inlet pipeline comprises a second accommodating cavity for accommodating gas and a plurality of nozzles communicated with the second accommodating cavity, the second accommodating cavity is formed by bending one end of the turbine volute inwards, and the inlet pipe is communicated with the second accommodating cavity;

the nozzle is fixed on the turbine volute along the circumferential direction of the second accommodating cavity, and the outlet of the nozzle faces the turbine so that the ejected gas pushes the turbine to rotate.

The gas power generation device also comprises a shell which is wrapped outside the bearing and a pressure plate which seals two ends of the shell;

at least one end of the rotating shaft penetrates through the pressing plate and is fixed with the turbine.

One end of the rotating shaft is provided with a thrust disc which is coaxial with the rotating shaft, the thrust disc is positioned in the shell, and the diameter of the thrust disc is larger than that of the rotating shaft;

the bearing includes edge hybrid bearing, thrust bearing and the journal bearing that the pivot axial set up, hybrid bearing and thrust bearing centre gripping in the thrust disc both sides, the journal bearing is located the pivot is kept away from the one end of thrust disc, be equipped with between thrust bearing and the journal bearing motor stator.

The gas inlet pipeline comprises a mixed bearing gas inlet pipe, a thrust bearing gas inlet pipe and a radial bearing gas inlet pipe which are fixed on the shell, and further comprises a mixed channel, a thrust channel and a radial channel which are respectively arranged in the mixed bearing, the thrust bearing and the radial bearing;

hybrid bearing intake pipe, thrust bearing intake pipe and radial bearing intake pipe respectively with hybrid channel, thrust passageway and radial passageway intercommunication, and hybrid channel's gas outlet orientation one side of thrust dish with the pivot, the gas outlet orientation of thrust passageway the opposite side of thrust dish, the gas outlet orientation of radial passageway the pivot.

Wherein, the gas inlet pipeline still includes a plurality of annular holding tanks, hybrid bearing, thrust bearing and journal bearing's the outside all is equipped with the holding tank, the inner wall of casing is sealed the holding tank, and hybrid bearing intake pipe, thrust bearing intake pipe and journal bearing intake pipe pass through the holding tank respectively with mixing channel, thrust channel and journal bearing intercommunication.

An annular groove is formed in one end or two ends, penetrating through the pressing plate, of the rotating shaft, and the diameter of the bottom of the annular groove is smaller than that of the rotating shaft;

the pressing plate is characterized in that a first circular through hole and a second circular through hole coaxial with the first circular through hole are formed in the middle of the pressing plate, the diameter of the first circular through hole is larger than that of the annular groove and smaller than that of the rotating shaft, and the diameter of the second circular through hole is larger than that of the rotating shaft.

The rotating shaft is internally provided with a hollow structure, and the middle part of the rotating shaft is fixed with the motor magnetic rotor and a motor rotor protective sleeve wrapped outside the motor magnetic rotor.

The gas outlet pipeline comprises a bearing gas exhaust pipe fixed on the shell, and one end of the bearing gas exhaust pipe penetrates through the shell and is communicated with an area between the bearing and the rotating shaft.

Compared with the prior art, the gas turbine is driven to rotate when the gas enters the turbine, so that the magnetic rotor of the motor rotates relative to the stator of the motor, and the pressure energy of the gas can be converted into electric energy. The gas is conveyed to the area between the bearing and the rotating shaft, so that the rotating shaft is in an air floatation state during working and cannot be in contact with the bearing, and therefore, the abrasion condition and the oil pollution risk during oil lubrication are avoided; and the rotating speed of the rotating shaft in the air floatation state can be very high, and the electric energy conversion efficiency at high speed is higher.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

fig. 1 is a schematic view showing a structure of a bearing according to an embodiment of the present invention;

fig. 2 is a schematic structural view illustrating a rotation shaft according to an embodiment of the present invention.

Description of reference numerals: 1-bearing, 11-hybrid bearing, 12-thrust bearing, 13-radial bearing, 2-shaft, 21-turbine, 22-thrust disk, 23-annular groove, 31-magnetic rotor of electric machine, 32-stator of electric machine, 33-rotor protective sleeve of electric machine, 41-bearing gas inlet line, 411-hybrid bearing gas inlet line, 412-thrust bearing gas inlet line, 413-radial bearing gas inlet line, 414-hybrid channel, 415-thrust channel, 416-radial channel, 417-housing tank, 42-turbine gas inlet line, 421-inlet line, 422-nozzle, 51-bearing gas exhaust line, 52-turbine gas exhaust line, 521-outlet line, 6-turbine volute, 61-first housing chamber, 62-second containing cavity, 7-shell, 8-pressing plate, 81-first circular through hole and 82-second circular through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.

It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 and 2, the present embodiment provides a gas power generation apparatus including:

a bearing 1;

a rotating shaft 2 penetrates through the bearing 1, and a turbine 21 coaxially fixed with the rotating shaft 2 is arranged on the rotating shaft 2;

the generator assembly comprises a motor magnetic rotor 31 arranged on the rotating shaft 2 and a motor stator 32 sleeved outside the rotating shaft 2, and the motor stator 32 is matched with the motor magnetic rotor 31 in position;

a gas inlet conduit communicating with the region between the bearing 1 and the shaft 2 and for conveying gas towards the turbine 21 to drive the turbine 21 in rotation;

a gas outlet line communicating with a region between the bearing 1 and the rotary shaft 2 and for discharging gas after driving the turbine 21 to rotate.

The gas power generation facility of this embodiment is when generating electricity, through the gas inlet pipeline with between gas bearing 1 and the pivot 2, can be so that pivot 2 be the air supporting state at the during operation, can not contact with bearing 1 to there is not the condition of wearing and tearing, also need not have the oil pollution risk when the oil lubrication. Meanwhile, in the present embodiment, the gas is delivered towards the turbine 21 through the gas inlet pipeline to act on the turbine 21, so that the turbine 21 is driven by the gas to rotate, the rotating shaft 2 is driven to rotate in the rotating process of the turbine 21, and the motor magnetic rotor 31 arranged on the rotating shaft 2 and the motor stator 32 rotate relatively, so that the generator assembly of the present embodiment starts to generate electricity. The present embodiment converts the pressure energy of the gas into mechanical energy and finally into electrical energy. For the embodiment, after the pressure energy of the gas is converted into the electric energy, the generator assembly of the embodiment can be connected to different devices according to practical application scenarios, for example, when the converted electric energy needs to be directly used, an inverter can be adopted to convert the electricity of the generator assembly into a suitable frequency for use; the generator assembly may be connected to an energy storage device when it is desired to store the converted electrical energy.

In practical application scenarios, the gas inlet pipeline of the present embodiment may include a bearing gas inlet pipeline 41 and a turbine gas inlet pipeline 42, the bearing gas inlet pipeline 41 is communicated with the region between the bearing 1 and the rotating shaft 2, and the turbine gas inlet pipeline 42 is used for conveying gas towards the turbine 21; the gas outlet includes a bearing gas exhaust line 51 and a turbine gas exhaust line 52, the bearing gas exhaust line 51 communicating with a region between the bearing 1 and the rotating shaft 2, and the turbine gas exhaust line 52 for exhausting gas after driving the turbine 21 to rotate. The gas outlet pipeline comprises a bearing gas exhaust pipe fixed on the shell 7, and one end of the bearing gas exhaust pipe penetrates through the shell 7 and is communicated with the area between the bearing 1 and the rotating shaft 2. The gas introduced into the bearing gas inlet pipeline 41 and the turbine gas inlet pipeline 42 may be the same gas or different gases. In the present embodiment, the same gas is preferably introduced into the bearing gas inlet pipeline 41 and the turbine gas inlet pipeline 42, so that the gas in the bearing 1 can be prevented from polluting the gas at the turbine 21.

Referring to fig. 1, the gas inlet pipeline of the present embodiment may be different structures according to actual requirements when acting on the turbine 21. In practical application scenarios, the gas power generation device may include turbine volutes 6 with the same number as the turbines 21, a first accommodating chamber 61 for accommodating the turbines 21 is arranged in the turbine volutes 6, the gas inlet pipeline includes an inlet pipe 421 communicated with the first accommodating chamber 61, and the gas outlet pipeline includes an outlet pipe 521 communicated with the first accommodating chamber 61 by the turbines 21. The present embodiment introduces gas into the first accommodation chamber 61 through the inlet pipe 421 to act on the turbine 21 in the first accommodation chamber 61 to rotate. In this embodiment, the gas acting on the turbine 21 is discharged through the outlet pipe 521, so that the gas passing through the inlet pipe 421 continuously acts on the turbine 21, thereby achieving the purpose of continuous rotation.

The present embodiment can be implemented by providing a corresponding structure in order to enhance the effect of the gas inlet pipeline on the turbine 21. In practical application scenarios, the gas inlet pipeline may include a second accommodating chamber 62 for accommodating gas and a plurality of nozzles 422 communicated with the second accommodating chamber 62, the second accommodating chamber 62 is formed by bending one end of the turbine volute 6 inwards, and the inlet pipe 421 is communicated with the second accommodating chamber 62; the nozzle 422 is fixed to the turbine volute 6 along the circumferential direction of the second accommodating chamber 62, and an outlet of the nozzle 422 faces the turbine 21, so that the ejected gas pushes the turbine 21 to rotate. The second receiving chamber 62 of the present embodiment can store the gas passing through the inlet pipe 421 and eject the gas through the nozzle 422, so that the gas acting on the turbine 21 has a good acting direction and a high acting force, and the pressure energy of the gas can be converted into electric energy to the greatest extent.

In order to ensure that the gas can act on the rotating shaft 2 to enable the rotating shaft 2 to be in an air floatation state during working after entering between the bearing 1 and the rotating shaft 2, the embodiment is provided with a corresponding sealing structure to achieve the effect. In practical application scenarios, the gas power generation device may further include a housing 7 wrapped outside the bearing 1 and a pressing plate 8 sealing two ends of the housing 7; at least one end of the rotating shaft 2 passes through the pressing plate 8 and is fixed with the turbine 21. This embodiment sets up casing 7 and clamp plate 8, has realized the sealed of regional between bearing 1 and pivot 2 to make gas get into the regional back between pivot 2 and the bearing 1, can keep higher pressure, and then can be the air supporting state under operating condition for the at utmost assurance pivot 2.

Referring to fig. 2, in order to prevent the rotating shaft 2 from moving in the axial direction thereof due to the gas pressure when the gas enters the region between the bearing 1 and the rotating shaft 2, a thrust disc 22 may be provided at one end of the rotating shaft 2, the thrust disc 22 being disposed coaxially with the rotating shaft 2, the thrust disc 22 being located in the housing 7, and the diameter of the thrust disc 22 being larger than that of the rotating shaft 2; the bearing 1 can include a hybrid bearing 11, a thrust bearing 12 and a radial bearing 13 which are arranged along the axial direction of the rotating shaft 2, the hybrid bearing 11 and the thrust bearing 12 are clamped at two sides of the thrust disc 22, the radial bearing 13 is arranged at one end of the rotating shaft 2 far away from the thrust disc 22, and a motor stator 32 is arranged between the thrust bearing 12 and the radial bearing 13. The present embodiment can prevent the rotating shaft 2 from moving axially during rotation by the cooperation of the thrust disc 22 with the hybrid bearing 11 and the thrust bearing 12. In addition, in the embodiment, the hybrid bearing 11 and the radial bearing 13 respectively located at the two ends of the rotating shaft 2 can enable the rotating shaft 2 to receive uniform acting force in the rotating process, so that the condition that one end of the rotating shaft 2 deviates in the rotating process is avoided.

Referring to fig. 1 and 2, when the gas inlet pipeline of the present embodiment delivers gas to the region between the bearing 1 and the rotating shaft 2, gas inlets may be respectively disposed at the positions of the hybrid bearing 11, the thrust bearing 12 and the radial bearing 13, so as to maximally exhibit the effects of the plurality of bearings 1. In practical application scenarios, the gas inlet pipeline may include a hybrid bearing gas inlet pipe 411, a thrust bearing gas inlet pipe 412, and a radial bearing gas inlet pipe 413 fixed on the housing 7, and further include a hybrid channel 414, a thrust channel 415, and a radial channel 416 respectively disposed in the hybrid bearing 11, the thrust bearing 12, and the radial bearing 13; the mixing bearing intake pipe 411, the thrust bearing intake pipe 412, and the radial bearing intake pipe 413 communicate with the mixing passage 414, the thrust passage 415, and the radial passage 416, respectively, and the air outlet of the mixing passage 414 faces one side of the thrust disk 22 and the rotating shaft 2, the air outlet of the thrust passage 415 faces the other side of the thrust disk 22, and the air outlet of the radial passage 416 faces the rotating shaft 2. In this embodiment, the hybrid bearing 11 and the thrust bearing 12 are disposed at the position of the thrust disc 22, so that the gas output by the hybrid bearing 11 and the gas output by the thrust bearing 12 act on the two sides of the thrust disc 22 respectively, and because the two sides of the thrust disc 22 receive opposite acting forces, the thrust disc 22 does not move axially, that is, the present embodiment ensures that the rotating shaft 2 does not move in the axial direction. In addition, in the embodiment, the mixing bearings 11 and the radial bearings 13 respectively located at the two ends of the rotating shaft 2 enable the positions of the gas output by the mixing channel 414 and the radial channel 416, which acts on the rotating shaft 2, to be symmetrical, so as to improve the stability of the rotating shaft 2 in an air floating state during operation.

In order to increase the pressure of the gas passing through the mixing passage 414, the thrust passage 415, and the radial passage 416, the gas inlet line of the present embodiment may further include a plurality of annular receiving grooves 417, the outer sides of the mixing bearing 11, the thrust bearing 12, and the radial bearing 13 are each provided with the receiving groove 417, the inner wall of the housing 7 seals the receiving groove 417, and the mixing bearing inlet pipe 411, the thrust bearing inlet pipe 412, and the radial bearing inlet pipe 413 are respectively communicated with the mixing passage 414, the thrust passage 415, and the radial passage 416 through the receiving groove 417. In an actual application scenario, the gas of the present embodiment enters the accommodating groove 417 through the hybrid bearing inlet pipe 411, the thrust bearing inlet pipe 412, and the radial bearing inlet pipe 413, and then is gathered in the accommodating groove 417; when the gathered gas enters the mixing channel 414, the thrust channel 415 and the radial channel 416 to be communicated, a large pressure is kept, so that when the gas acts on the rotating shaft 2 and the thrust disc 22, a certain distance exists between the rotating shaft 2 and the thrust disc 22 and the bearing 1, that is, the rotating shaft 2 is in an air floating state during operation.

In order to reduce the energy consumed by the rotation of the rotating shaft 2, the structure of the rotating shaft can be correspondingly arranged. In the practical application scene, the inside of pivot 2 is hollow out construction to 2 middle parts of pivot are fixed with motor magnetism rotor 31 and wrap up the motor rotor protective sheath 33 outside motor magnetism rotor 31. Through carrying out fretwork processing to pivot 2, can reduce the weight of pivot 2 to reduce the energy that will consume when pivot 2 rotates. In addition, the motor magnetic rotor 31 can be protected by the motor rotor protection sleeve 33 in the embodiment, and the situation that the motor magnetic rotor 31 is broken due to centrifugal force when the motor magnetic rotor rotates at a high speed is avoided.

In order to improve the sealing performance of the shell 7 and the stability of the rotating shaft 2, an annular groove 23 may be formed in one end or two ends of the rotating shaft 2, which penetrate through the pressing plate 8, and the diameter of the bottom of the annular groove 23 is smaller than that of the rotating shaft 2; the middle part of the pressure plate 8 is provided with a first circular through hole 81 and a second circular through hole 82 which is coaxial with the first circular through hole 81, the diameter of the first circular through hole 81 is larger than that of the annular groove 23 and smaller than that of the rotating shaft 2, and the diameter of the second circular through hole 82 is larger than that of the rotating shaft 2. When one end of the rotating shaft 2 is provided with the turbine 21, the end of the rotating shaft 2 corresponding to the turbine 21 in the embodiment is provided with the annular groove 23, and the pressing plate 8 on the side is provided with the first circular through hole 81 and the second circular through hole 82, so that the rotating shaft 2 can extend out of the pressing plate 8 and be fixed with the turbine 21. When the both ends of pivot 2 all were equipped with turbine 21, this embodiment pivot 2 both ends all were equipped with annular groove 23 to the clamp plate 8 of both sides all is equipped with first circular through-hole 81 and the circular through-hole 82 of second, and the both ends of this pivot 2 are stretched out clamp plate 8 and are fixed with turbine 21. The pressing plate 8 of the present embodiment can form a stepped structure by the arrangement of the first circular through hole 81 and the second circular through hole 82, so as to improve the sealing property when the rotating shaft 2 passes through the pressing plate 8; and due to the arrangement of the stepped structure, the pressure plate 8 can limit the rotating shaft 2 in the axial direction, so that the stability of the rotating shaft 2 in the rotating process is improved. In addition, when the turbines 21 are disposed at both ends of the rotating shaft 2 in the embodiment, the two turbines 21 should have the same mirror symmetry design (the flow channels of the turbines 21 are designed in the same manner, but the rotation directions are opposite), and the axial thrust generated on the turbines 21 is equal in magnitude and opposite in direction, so that the load of the thrust disc 22 can be greatly reduced.

The foregoing describes preferred embodiments of the present invention, and is intended to provide a clear and concise description of the spirit and scope of the utility model, and not to limit the same, but to include all modifications, substitutions, and alterations falling within the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A gas power plant, comprising:

a bearing;

2. The gas power plant as set forth in claim 1, wherein said gas power plant comprises a number of turbine volutes equal to the number of said turbines, a first accommodating chamber for accommodating said turbines is provided in said turbine volutes, said gas inlet line comprises an inlet pipe communicating with said first accommodating chamber, and said gas outlet line comprises an outlet pipe communicating with said first accommodating chamber and said turbines.

3. The gas power plant of claim 2, wherein the gas inlet pipeline includes a second receiving chamber for receiving gas and a plurality of nozzles communicating with the second receiving chamber, the second receiving chamber is formed by bending one end of the turbine volute inward, and the inlet pipe communicates with the second receiving chamber;

4. The gas power plant of claim 1, further comprising a housing enclosing the bearing and a pressure plate sealing both ends of the housing;

5. The gas power plant of claim 4, wherein said shaft has a thrust disk disposed coaxially therewith at one end, said thrust disk being located within said housing and having a diameter greater than a diameter of said shaft;

the bearing includes along hybrid bearing, thrust bearing and the journal bearing of pivot axial setting, hybrid bearing and thrust bearing centre gripping in the thrust disc both sides, journal bearing is located the pivot is kept away from the one end of thrust disc, be equipped with between thrust bearing and journal bearing motor stator.

6. The gas power plant of claim 5, wherein said gas inlet line comprises a hybrid bearing gas inlet tube, a thrust bearing gas inlet tube, and a radial bearing gas inlet tube secured to the housing, and further comprising a hybrid channel, a thrust channel, and a radial channel disposed within said hybrid bearing, thrust bearing, and radial bearing, respectively;

7. The gas power plant of claim 6, wherein said gas inlet line further comprises a plurality of annular receiving grooves, said receiving grooves being provided on the outer sides of said mixing bearing, thrust bearing and radial bearing, said inner wall of said housing sealing said receiving grooves, and said mixing bearing inlet duct, thrust bearing inlet duct and radial bearing inlet duct communicating with said mixing channel, thrust channel and radial channel, respectively, through said receiving grooves.

8. The gas power plant of claim 4, wherein the rotating shaft has an annular groove at one or both ends thereof penetrating the pressure plate, and the diameter of the bottom of the annular groove is smaller than that of the rotating shaft;

9. The gas power plant of claim 1, wherein said gas inlet line comprises a bearing gas inlet line and a turbine gas inlet line, said bearing gas inlet line communicating with a region between said bearing and a rotating shaft, said turbine gas inlet line for conveying gas towards said turbine;

10. The gas power generation device according to claim 1, wherein the inside of the rotating shaft is a hollow structure, and the middle part of the rotating shaft is fixed with the motor magnetic rotor and a motor rotor protective sleeve which is wrapped outside the motor magnetic rotor.