CN216950579U - Internal and external mixed combustion engine with combustion nozzle - Google Patents

Abstract

The utility model discloses an internal and external mixed combustion engine with a combustion nozzle, which comprises a gas turbine and a steam generator, wherein the exhaust end of the gas turbine is connected with the air inlet end of the steam generator; the steam outlet end of the steam generator is connected with the gas turbine; the combustion nozzle is arranged in a combustion chamber of the gas turbine and comprises a steam pipe and a fuel pipe, the inlet end of the fuel pipe is communicated with a fuel tank of the gas turbine, the tail end of the fuel pipe extends into the steam pipe and is coaxial with the steam pipe, and the steam pipe is communicated with the steam outlet end of the steam generator. The gas turbine is a single rotor gas turbine. The utility model can effectively recover the waste heat of the tail gas of the gas turbine, realizes the combined utilization of the gas and the steam, improves the efficiency of the gas turbine and reduces the energy waste. Through the combustion nozzle with a special structure, the backfire can be effectively prevented, and the combustion of fuel is more stable and sufficient.

Description

Internal and external mixed combustion engine with combustion nozzle

Technical Field

The utility model relates to an internal and external mixed combustion engine with a combustion nozzle, and belongs to the technical field of engines.

Background

The 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 device mainly comprises three parts of a gas compressor, a combustion chamber and a turbine: the air compressor sucks air from the external atmospheric environment, compresses the air to pressurize the air, and simultaneously, the air temperature is correspondingly increased; 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 can be partially converted into mechanical work and heat energy, and the mechanical work and the heat energy can be output through connecting a generator.

The gas turbine has the advantages of compact structure, high power, easy installation and the like, and becomes a widely used power machine. However, the efficiency of a single gas turbine is limited, and the exhaust gas is discharged to the surrounding environment, which wastes a lot of useful energy, resulting in energy waste, and the waste heat in the exhaust gas has a certain influence on the environment.

The combustor is one of the important components of a gas turbine, and a working fluid (generally compressed air) from a compressor is introduced into the combustor and mixed with fuel for combustion. In the existing gas turbine combustion chamber, fuel is sprayed out and then directly contacts with air, a tempering phenomenon often occurs due to violent reaction, when the reaction is incomplete, flame can be extinguished due to generated carbon and nitrogen compounds, and adverse effects are generated on the environment due to incomplete reaction and more discharged pollutants.

Disclosure of Invention

Aiming at the prior art, the utility model provides the internal and external mixed combustion engine with the combustion nozzle, which can effectively recover the waste heat of tail gas, realize the combined utilization of gas and steam of a gas turbine, improve the efficiency of the gas turbine and reduce the energy waste, and can effectively prevent tempering due to the combustion nozzle with a special structure.

The utility model is realized by the following technical scheme:

the internal and external mixed combustion engine is provided with a combustion nozzle and comprises a gas turbine and a steam generator, wherein the exhaust end of the gas turbine is connected with the air inlet end of the steam generator; the steam outlet end of the steam generator is connected with the gas turbine;

a combustion nozzle is arranged in a combustion chamber of the gas turbine and comprises a steam pipe and a fuel pipe, the inlet end of the fuel pipe is communicated with a fuel tank of the gas turbine, the tail end of the fuel pipe extends into the steam pipe and is coaxial with the steam pipe, and the steam pipe is communicated with the steam outlet end of the steam generator;

the gas turbine is a single-rotor gas turbine and comprises a rotating shaft, a gas compressor, a motor, a turbine and a combustion chamber, wherein the gas compressor, the motor and the turbine are all sleeved on the rotating shaft, the gas outlet end of the gas compressor is connected with the gas inlet end of the combustion chamber, the gas outlet end of the combustion chamber is connected with the gas inlet end of the turbine, and the gas exhaust end of the turbine is connected with the gas inlet end of the steam generator.

Further, the end section of the steam pipe or/and the end section of the fuel pipe are/is a straight pipe.

Further, the end section of the steam pipe or/and the end section of the fuel pipe are/is a flared pipe, and the outlet of the steam pipe or/and the outlet of the fuel pipe are/is expanded or converged. Furthermore, the wall generatrix of the end section of the steam pipe or/and the end section of the fuel pipe is linear or curved in the axial section direction.

Further, the end section of the steam pipe or/and the end section of the fuel pipe is an hourglass-shaped pipe, and a convergent throat pipe is arranged in the middle of the hourglass-shaped pipe.

Further, the end section of the steam pipe or/and the end section of the fuel pipe is/are composed of more than two (including two) stepped convergent sections which are connected with each other, when more than two convergent sections are adopted, even if the initial flow rate of fluid is low, enough vacuum degree can be obtained in a small convergent section, pressure or flow rate compensation is obtained, and a better mixing effect is obtained.

Furthermore, a reheater is arranged at the steam outlet end of the steam generator, and the steam is heated by the reheater and then injected into the gas turbine.

Furthermore, the internal and external mixed combustion engine further comprises a condenser, the steam outlet end of the steam generator is connected with the steam inlet end of the condenser, and the water outlet end of the condenser is connected with the water inlet end of the steam generator through a pump.

Further, the turbine is a centripetal turbine; set gradually first thrust dish, second thrust dish, motor, compressor and centripetal turbine in the pivot, set up thrust bearing between first thrust dish and the second thrust dish, second thrust dish outer wall sets up radial bearing, in the pivot, be located the compressor back of the body gas face and set up thrust bearing, in the pivot, be located and set up radial bearing between compressor and the centripetal turbine.

Further, the turbine is an axial turbine; set gradually first thrust dish, second thrust dish, motor, compressor and axial-flow turbine in the pivot, set up thrust bearing between first thrust dish and the second thrust dish, second thrust dish outer wall sets up radial bearing, in the pivot, be located the compressor back of the body gas face and set up thrust bearing, in the pivot, be located and set up radial bearing between compressor and the axial-flow turbine.

Further, the turbine is an axial turbine; the axial-flow turbine air inlet device is characterized in that the air compressor, the motor and the axial-flow turbine are sequentially arranged on the rotating shaft, a bearing sleeve and a radial bearing are arranged on the rotating shaft and between the air compressor and the motor, a thrust disc is arranged on the rotating shaft and between the motor and the axial-flow turbine, a pair of opposite thrust discs are arranged on a stator surrounding the rotating shaft and the motor, the thrust disc is arranged between the pair of opposite thrust discs and between the thrust disc and the opposite thrust disc, and the bearing sleeve and the radial bearing are arranged on the rotating shaft and on the air inlet side of the axial-flow turbine.

Furthermore, the motor is a starting integrated motor, when the motor is started, the motor is used as a starter to drive the micro gas turbine to rotate, and after the motor is accelerated to be capable of operating independently, the starter is disconnected and converted into a generator.

Furthermore, a diffuser can be arranged at the joint of the compressor and the combustion chamber, and the working medium enters the combustion chamber after being compressed by the compressor and diffused by the diffuser.

The tail end of the combustion nozzle is sleeved with an air swirler, the inlet of the air swirler is connected with an air source, and the air injection direction of the outlet of the air swirler faces the ejection direction of the combustion nozzle.

Further, the air swirler is arc-shaped in the axial cross-sectional direction.

Furthermore, the steam outlet end of the steam generator can be communicated with the air inlet end of the combustion chamber of the gas turbine, so that the steam can be premixed with the working medium before the working medium enters the combustion chamber, and the working medium and the steam are uniformly distributed and serve as a new combustion working medium.

When the internal and external mixed combustion engine works, the gas turbine discharges tail gas into the steam generator through the exhaust end, and the tail gas exchanges heat with water in the steam generator to generate steam; a part of generated steam is reinjected into the gas turbine, and during practical application, the flow of the steam reinjected into the gas turbine can be controlled, for example, the flow ratio of the steam to a working medium entering the gas turbine is controlled to be 2-3: 1; one part of the steam is injected into the condenser, condensed water is formed in the condenser by the steam, and the condensed water is added into the steam generator through a pump so as to supplement the water evaporated into the steam.

According to the internal and external mixed combustion engine, the steam pipe is arranged outside the fuel pipe, and the sprayed steam forms a layer of protective cover outside the fuel, so that on one hand, a working medium can be isolated, the phenomenon that the reaction is too violent due to the direct contact of the working medium and the fuel is prevented, the tempering is prevented, and the temperature in the combustion chamber can be reduced; on the other hand, before the fuel contacts with the working medium, the fuel is premixed with the steam and then mixed with the working medium for combustion, the reaction is stable and thorough, and the emission of toxic and harmful gases generated by incomplete combustion can be reduced. In practical application, the flow ratio of the fuel in the fuel pipe and the steam in the steam pipe can be controlled, for example, the volume ratio of the fuel to the steam is controlled to be 1: 0.1-100; preferably 0.3 to 4. The fuel in the fuel tube may be selected from hydrogen. The end of the burning nozzle can be sleeved with an air swirler, the air spraying direction faces to the hydrogen flow direction, and the hydrogen flow containing the water vapor sprayed by the burning nozzle can be mixed to facilitate the burning.

The internal and external mixed combustion engine of the utility model, steam is injected into the combustion chamber of the gas turbine to participate in combustion (when the fuel contains carbon element), the principle is as follows: the steam and the carbon element of the fuel in the high-temperature combustion are subjected to chemical reaction to generate carbon monoxide and hydrogen, the carbon monoxide and the hydrogen are combustible gases, so that the obvious combustion-supporting effect can be achieved, the combustion is more sufficient, the emission of toxic and harmful gases generated due to incomplete combustion is reduced, and the heat energy utilization rate of the fuel combustion is greatly improved.

The internal and external mixed gas turbine can effectively recover the waste heat of the tail gas of the gas turbine, realizes the combined utilization of the gas and the steam of the gas turbine, improves the efficiency of the gas turbine and reduces the energy waste. Meanwhile, the burning pollutants can be cleaned by steam, so that the pollutants are prevented from being discharged into the atmosphere, and the emission cleanliness can be obviously improved. And, through setting up the combustion nozzle of special construction, can not only prevent effectively that the tempering still makes the burning of fuel more stable and abundant. The internal and external mixed combustion engine has the advantages of high power supply efficiency, low investment, short construction period, low land and water consumption, high operation automation degree, low pollutant emission and the like.

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 structure of the internal and external mixed combustion engine is schematically shown.

FIG. 2: the structure of the combustion nozzle is schematically shown (longitudinal sectional view).

FIG. 3: schematic structural view (cross sectional view) of the combustion nozzle.

FIG. 4: a sectional view of the steam pipe (a flared pipe with an outward-expanded outlet, a wall surface generatrix of which is a straight line when viewed from the axial sectional direction).

FIG. 5: a sectional view of the steam pipe (a flared pipe with a constricted outlet, a wall surface generatrix of which is a straight line when viewed from the axial cross-sectional direction).

FIG. 6: a sectional view of the steam pipe (a flared pipe with a constricted outlet, a wall generatrix of which is curved when viewed from the axial cross-sectional direction).

FIG. 7 is a schematic view of: cross-sectional view of the steam tube (hourglass-shaped tube with a converging throat in the middle).

FIG. 8: cross-sectional view of the steam pipe (consisting of two stepped convergent sections connected to each other).

FIG. 9: a cross-sectional view of the fuel pipe (flared pipe with an outlet flared, and a wall surface generatrix is a straight line when viewed from the axial cross-sectional direction).

FIG. 10: a cross-sectional view of the fuel pipe (a flared pipe with a converging outlet, a wall surface generatrix of which is a straight line when viewed from the axial cross-sectional direction).

FIG. 11: a cross-sectional view of the fuel pipe (a flared pipe with a converging outlet, a wall generatrix of which is curved when viewed from the axial cross-sectional direction).

FIG. 12: cross-sectional view of the fuel tube (hourglass tube with a converging throat in the middle).

FIG. 13: a cross-sectional view of the fuel tube (consisting of two stepped convergent sections connected to each other).

FIG. 14: the structure of the single-rotor gas turbine is shown schematically.

FIG. 15: the gas turbine structure of example 2 is schematically illustrated.

FIG. 16: the gas turbine structure of example 3 is schematically illustrated.

FIG. 17: the gas turbine structure of example 4 is schematically illustrated.

FIG. 18: the structure of the combustion nozzle with the swirler is schematically shown (the direction indicated by the arrow in the figure is the air flow direction).

Wherein, 1, a gas turbine; 2. a steam generator; 3. a condenser; 4. a pump; 5. tail gas; 6. steam; 7. condensing water; 8. working medium; 9. electrical energy; 102. a compressor; 103. a motor; 104. a turbine; 105. a combustion chamber; 106. a diffuser; 107. An airway; 108. a stator; 611. a steam pipe; 6111. an outlet of the steam pipe; 612. a fuel tube; 6121. an outlet of the fuel pipe; 613. an air swirler.

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 utility model without departing from the spirit and scope of the utility model.

Example 1

An internal and external mixed combustion engine provided with a combustion nozzle comprises a gas turbine 1 and a steam generator 2, wherein as shown in figure 1, the exhaust end of the gas turbine 1 is connected with the air inlet end of the steam generator 2; the steam outlet end of the steam generator 2 is connected with the gas turbine 1;

the combustion chamber 105 of the gas turbine 1 is provided with a combustion nozzle, the combustion nozzle comprises a steam pipe 611 and a fuel pipe 612, the inlet end of the fuel pipe 612 is communicated with the fuel tank of the gas turbine 1, the end section of the fuel pipe 612 extends into the steam pipe 611 and is coaxial with the steam pipe 611, as shown in fig. 2, the steam pipe 611 is communicated with the steam outlet end of the steam generator 2.

The end of the steam pipe 611 may be a straight pipe, as shown in fig. 2 and 3.

The end of the steam pipe 611 may also be a flared pipe, and the outlet 6111 of the steam pipe is flared (as shown in fig. 4) or converged (as shown in fig. 5). The wall surface generatrix of the end of the steam pipe 611 is linear (as shown in fig. 4 and 5) or curved (as shown in fig. 6, the curve is an arc line) in the axial cross-sectional direction.

The end of the steam pipe 611 may be an hourglass-shaped pipe with a converging throat in the middle, as shown in fig. 7.

The end section of the steam pipe 611 may also be composed of more than two sections of stepped convergent sections connected with each other, as shown in fig. 8 (two sections are shown in fig. 7); when more than two sections of convergence sections are adopted, even if the initial flow velocity of the fluid is low, enough vacuum degree can be obtained in the small convergence section, pressure or flow velocity compensation is obtained, and a better mixing effect is obtained.

The end of the fuel pipe 612 may be a straight pipe, as shown in fig. 2 and 3.

The end section of the fuel tube 612 may also be a flared tube, and the outlet 6121 of the fuel tube may be flared (as shown in fig. 9) or may be inwardly convergent (as shown in fig. 10). The wall generatrix of the end section of the fuel tube 612 is straight (as shown in fig. 9 and 10) or curved (as shown in fig. 11, the curve is an arc line) in the axial cross-sectional direction.

The end sections of the fuel tubes 612 may be hourglass-shaped tubes with converging throats in the middle of the hourglass-shaped tubes, as shown in FIG. 12.

The end section of the fuel tube 612 may also be formed by more than two sections of stepped convergent sections connected with each other, as shown in fig. 13 (two sections are shown in fig. 13); when more than two sections of convergence sections are adopted, even if the initial flow rate of the fluid is low, enough vacuum degree can be obtained in the small convergence section, pressure or flow rate compensation is obtained, and a good mixing effect is obtained.

In a specific application, the shape of the end section of the steam pipe 611 can be any one of the above 7, namely: a first step of straight pipe; secondly, the flared tube with the outward-expanded outlet is provided with a wall surface bus in a straight line when viewed from the cross section direction of the shaft; thirdly, the flared tube with the outward-expanded outlet is provided with a curved wall surface generatrix when viewed from the cross section direction of the shaft; a flared tube with a converged outlet, wherein a wall surface generatrix is linear when viewed from the cross section direction of the shaft; a flared pipe with a convergent outlet, wherein a wall surface generatrix is a curve when viewed from the cross section direction of the shaft; sixthly, arranging a convergent choke in the middle of the hourglass-shaped pipe; and is formed by more than two sections of step-shaped convergence sections which are connected with each other. Likewise, the shape of the end of the fuel tube 612 may be any of the above 7. The structures of the combustion nozzles of the internal and external mixed combustion engine can be freely combined with each other, and theoretically, the structures of the combustion nozzles of the internal and external mixed combustion engine are at least 42 combinations.

The steam outlet of the steam generator 2 may be provided with a reheater, and the steam is heated by the reheater and then injected into the gas turbine 1.

The internal and external mixed combustion engine also comprises a condenser 3, the steam outlet end of the steam generator 2 is connected with the steam inlet end of the condenser 3, and the water outlet end of the condenser 3 is connected with the water inlet end of the steam generator 2 through a pump 4.

An air swirler 613 may be sleeved outside the end of the combustion nozzle, as shown in fig. 18, the air swirler may be arc-shaped in the axial cross-sectional direction, the inlet of the air swirler is connected to the air source, and the air injection direction of the outlet of the air swirler faces the ejection direction of the combustion nozzle.

The steam outlet end of the steam generator 2 can be communicated with the air inlet end of the combustion chamber 105 of the gas turbine 1, so that the steam 6 can be premixed with the working medium 8 before the working medium 8 enters the combustion chamber 105, and the working medium 8 and the steam 6 are uniformly distributed to serve as new combustion working media.

When the internal and external mixed combustion engine with the structure works, the gas turbine 1 discharges tail gas 5 into the steam generator 2 through the exhaust end, and the tail gas 5 exchanges heat with water in the steam generator 2 to produce steam 6; a part of the generated steam 6 is reinjected into the gas turbine 1, and during practical application, the flow of the steam 6 reinjected into the gas turbine 1 can be controlled, for example, the flow ratio of the steam 6 to a working medium 8 entering the gas turbine 1 is controlled to be 2-3: 1; a portion is fed into the condenser 3 and the steam 6 forms condensed water 7 in the condenser 3, which condensed water 7 is fed to the steam generator 2 by means of the pump 4 to replenish the water evaporated to steam.

The fuel is sprayed out through a fuel pipe 612 of the combustion nozzle, meanwhile, the steam 6 is sprayed out through a steam pipe 611, and the sprayed steam 6 forms a layer of protective cover outside the fuel, so that on one hand, the working medium 8 can be isolated, the phenomenon that the reaction is too violent due to the direct contact of the working medium 8 and the fuel is prevented, the tempering is prevented, and the temperature in the combustion chamber can be reduced; on the other hand, before the fuel contacts with the working medium 8, the fuel is premixed with the steam 6 and then mixed with the working medium 8 for combustion, the reaction is stable and thorough, and the emission of toxic and harmful gases generated by incomplete combustion can be reduced. In practical application, the flow ratio of the fuel in the fuel pipe to the steam 6 in the steam pipe can be controlled, for example, the volume ratio of the fuel to the steam 6 is controlled to be 1: 0.1-100; preferably 0.3 to 4. The fuel in the fuel tube 612 may be selected from hydrogen. Working medium 8 may be air, which enters from the inlet of the sidewall of the air cyclone 613, and is sprayed into the mixture of hydrogen and steam from the outlet after swirling. The gas turbine 1 is a single-rotor gas turbine and comprises a rotating shaft, a gas compressor 102, a motor 103, a turbine 104 and a combustion chamber 105, as shown in fig. 14, the gas compressor 102, the motor 103 and the turbine 104 are all sleeved on the rotating shaft, the gas outlet end of the gas compressor 102 is connected with the gas inlet end of the combustion chamber 105, the gas outlet end of the combustion chamber 105 is connected with the gas inlet end of the turbine 104, and the gas outlet end of the turbine 104 is connected with the gas inlet end of the steam generator 2.

The motor 103 may be a starting integrated motor, and when started, the starting integrated motor serves as a starter to drive the micro gas turbine to rotate, and after the micro gas turbine is accelerated to be capable of operating independently, the starter is disengaged and converted into a generator.

A diffuser 106 can be arranged at the joint of the compressor 102 and the combustion chamber 105, and the working medium 8 enters the combustion chamber 105 after being compressed by the compressor 102 and diffused by the diffuser 106.

When the single-rotor gas turbine works, a working medium 8 (generally air) is sucked from the outside at the low-pressure end of the gas compressor 102, the working medium 8 is compressed and pressurized by the gas compressor 102, then enters the combustion chamber 105 and is mixed and combusted with injected fuel to generate high-temperature and high-pressure gas, the high-temperature gas enters the turbine 104 from the gas outlet end of the combustion chamber 105 and pushes the turbine 104 to do work, the turbine 104 drives the coaxial motor 103 to generate electricity and drives the gas compressor 102 to work, and partial chemical energy of the gas or liquid fuel is converted into mechanical energy and electric energy 9 is output; the high-temperature gas does work on the turbine 104, and is discharged from the exhaust end as tail gas 5, enters the steam generator 2, and after heat exchange, part of steam 6 discharged from the steam generator 2 is injected back into the gas turbine 1.

The rotor system of the gas turbine described above includes, but is not limited to, the forms shown in the following embodiments 2, 3, 4.

EXAMPLE 2 rotor System

As shown in fig. 15, the turbine 104 is a radial inflow turbine; the improved centrifugal compressor is characterized in that a first thrust disc, a second thrust disc, a motor 103, a compressor 102 and a centripetal turbine are sequentially arranged on the rotating shaft, a thrust bearing is arranged between the first thrust disc and the second thrust disc, a radial bearing is arranged on the outer wall of the second thrust disc, the thrust bearing is arranged on the back gas surface of the compressor 102 and located on the rotating shaft, and the radial bearing is arranged between the compressor 102 and the centripetal turbine and located on the rotating shaft.

EXAMPLE 3 rotor System

As shown in fig. 16, the turbine 104 is an axial turbine; the axial-flow type turbine thrust bearing comprises a rotating shaft, and is characterized in that a first thrust disc, a second thrust disc, a motor 103, a compressor 102 and an axial-flow type turbine are sequentially arranged on the rotating shaft, a thrust bearing is arranged between the first thrust disc and the second thrust disc, a radial bearing is arranged on the outer wall of the second thrust disc, the thrust bearing is arranged on the back gas surface of the compressor 102 on the rotating shaft, and the radial bearing is arranged between the compressor 102 and the axial-flow type turbine on the rotating shaft.

EXAMPLE 4 rotor System

As shown in fig. 17, the turbine 104 is an axial turbine; the axial-flow turbine structure is characterized in that the rotating shaft is sequentially provided with the gas compressor 102, the motor 103 and the axial-flow turbine, a bearing sleeve and a radial bearing are arranged on the rotating shaft and between the gas compressor 102 and the motor 103, a thrust disc is arranged on the rotating shaft and between the motor 103 and the axial-flow turbine, a pair of opposite thrust discs are arranged on a stator 108 surrounding the rotating shaft and the motor 103, the thrust disc is arranged between the pair of opposite thrust discs and between the thrust disc and the opposite thrust disc, and the rotating shaft and the air inlet side of the axial-flow turbine are provided with the bearing sleeve and the radial bearing.

An air channel 107 is arranged between the air outlet end of the compressor 102 and the air inlet end of the turbine 104.

The above examples are provided to those of ordinary skill in the art to fully disclose and describe how to make and use the claimed embodiments, and are not intended to limit the scope of the disclosure herein. Modifications apparent to those skilled in the art are intended to be within the scope of the appended claims.

Claims (10)

1. The utility model provides an inside and outside mixture machine with combustion nozzle which characterized in that: the internal and external mixed combustion engine comprises a gas turbine and a steam generator, and the exhaust end of the gas turbine is connected with the air inlet end of the steam generator; the steam outlet end of the steam generator is connected with the gas turbine;

a combustion nozzle is arranged in a combustion chamber of the gas turbine and comprises a steam pipe and a fuel pipe, the inlet end of the fuel pipe is communicated with a fuel tank of the gas turbine, the tail end of the fuel pipe extends into the steam pipe and is coaxial with the steam pipe, and the steam pipe is communicated with the steam outlet end of the steam generator;

the gas turbine is a single-rotor gas turbine and comprises a rotating shaft, a gas compressor, a motor, a turbine and a combustion chamber, wherein the gas compressor, the motor and the turbine are all sleeved on the rotating shaft, the gas outlet end of the gas compressor is connected with the gas inlet end of the combustion chamber, the gas outlet end of the combustion chamber is connected with the gas inlet end of the turbine, and the gas exhaust end of the turbine is connected with the gas inlet end of the steam generator.

2. The internal-external hybrid combustion engine provided with a combustion nozzle according to claim 1, characterized in that: the end section of the steam pipe or/and the end section of the fuel pipe is a straight pipe.

3. The internal-external hybrid combustion engine provided with a combustion nozzle according to claim 1, characterized in that: the tail section of the steam pipe or/and the tail section of the fuel pipe are/is a flared pipe, and the outlet of the steam pipe or/and the outlet of the fuel pipe are/is expanded or converged; and the wall surface generatrix of the end section of the steam pipe or/and the end section of the fuel pipe is linear or curved in the axial section direction.

4. The internal-external hybrid combustion engine provided with a combustion nozzle according to claim 1, characterized in that: the tail section of the steam pipe or/and the tail section of the fuel pipe are/is an hourglass-shaped pipe, and a convergent throat pipe is arranged in the middle of the hourglass-shaped pipe.

5. The internal-external hybrid combustion engine provided with a combustion nozzle according to claim 1, characterized in that: the end section of the steam pipe or/and the end section of the fuel pipe is formed by more than two stepped convergent sections which are connected with each other.

6. The internal and external mixed combustion engine provided with the combustion nozzle as set forth in any one of claims 1 to 5, wherein: the shape of the steam pipe end section or/and the fuel pipe end section is any one of the following 7 types: a first step of straight pipe; a flared tube with an outward-expanded outlet is provided, and a wall surface bus is linear when viewed from the axial section direction; thirdly, the flared tube with the outward-expanded outlet is provided with a curved wall surface generatrix when viewed from the cross section direction of the shaft; a flared tube with a converged outlet, wherein a wall surface generatrix is linear when viewed from the cross section direction of the shaft; a flared pipe with a convergent outlet, wherein a wall surface generatrix is a curve when viewed from the cross section direction of the shaft; sixthly, arranging a convergent choke in the middle of the hourglass-shaped pipe; and is formed by more than two sections of step-shaped convergence sections which are mutually connected.

7. The internal-external hybrid combustion engine provided with a combustion nozzle according to claim 1, characterized in that: and a steam outlet end of the steam generator is provided with a reheater, and the steam is heated by the reheater and then injected into the gas turbine.

8. The internal-external hybrid combustion engine provided with a combustion nozzle according to claim 1, characterized in that: the internal and external mixed combustion engine further comprises a condenser, the steam outlet end of the steam generator is connected with the steam inlet end of the condenser, and the water outlet end of the condenser is connected with the water inlet end of the steam generator through a pump.

9. The internal-external hybrid combustion engine provided with a combustion nozzle according to claim 1, characterized in that: the turbine is a centripetal turbine; the rotating shaft is sequentially provided with a first thrust disc, a second thrust disc, a motor, a gas compressor and a centripetal turbine, a thrust bearing is arranged between the first thrust disc and the second thrust disc, the outer wall of the second thrust disc is provided with a radial bearing, the rotating shaft is provided with the thrust bearing on the back gas surface of the gas compressor, and the rotating shaft is provided with the radial bearing between the gas compressor and the centripetal turbine;

or: the turbine is an axial turbine; the rotating shaft is sequentially provided with a first thrust disc, a second thrust disc, a motor, a gas compressor and an axial-flow turbine, a thrust bearing is arranged between the first thrust disc and the second thrust disc, the outer wall of the second thrust disc is provided with a radial bearing, the rotating shaft is provided with the thrust bearing on the back gas surface of the gas compressor, and the rotating shaft is provided with the radial bearing between the gas compressor and the axial-flow turbine;

or: the turbine is an axial turbine; the axial-flow turbine air inlet device is characterized in that the air compressor, the motor and the axial-flow turbine are sequentially arranged on the rotating shaft, a bearing sleeve and a radial bearing are arranged on the rotating shaft and between the air compressor and the motor, thrust discs are arranged on the rotating shaft and between the motor and the axial-flow turbine, a pair of opposite side thrust discs are arranged on a stator surrounding the rotating shaft and the motor, the thrust discs are arranged between the pair of opposite side thrust discs and between the thrust discs and the opposite side thrust discs, and the bearing sleeve and the radial bearing are arranged on the rotating shaft and on the air inlet side of the axial-flow turbine.

10. The internal-external hybrid combustion engine provided with a combustion nozzle according to claim 1, characterized in that: the tail end of the combustion nozzle is sleeved with an air swirler, the inlet of the air swirler is connected with an air source, and the air injection direction of the outlet of the air swirler faces the ejection direction of the combustion nozzle.

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