CN113756900A - Internal and external mixed combustion engine - Google Patents

Internal and external mixed combustion engine Download PDF

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Publication number
CN113756900A
CN113756900A CN202111034470.6A CN202111034470A CN113756900A CN 113756900 A CN113756900 A CN 113756900A CN 202111034470 A CN202111034470 A CN 202111034470A CN 113756900 A CN113756900 A CN 113756900A
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China
Prior art keywords
turbine
rotating shaft
motor
gas
steam
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CN202111034470.6A
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Chinese (zh)
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靳普
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Liu Muhua
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Jinpu Technology Beijing Co ltd
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Priority to CN202111034470.6A priority Critical patent/CN113756900A/en
Publication of CN113756900A publication Critical patent/CN113756900A/en
Priority to PCT/CN2022/116643 priority patent/WO2023030468A1/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/12—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engines being mechanically coupled
    • F01K23/14—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engines being mechanically coupled including at least one combustion engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F01K27/02—Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention discloses an internal and external mixed combustion engine, 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, and the steam outlet end of the steam generator is connected with the gas turbine; the gas turbine is a multi-rotor gas turbine and comprises a first rotor system and a second rotor system; the first rotor system comprises a first rotating shaft, a first motor, a first gas compressor, a first turbine and a first combustion chamber; the second rotor system comprises a second rotating shaft, a second turbine and a second motor; the steam from the steam generator is injected back into the gas turbine. The invention 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.

Description

Internal and external mixed combustion engine
Technical Field
The invention relates to an internal and external mixed combustion engine, belonging 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, and compresses the air step by step to pressurize the air, and meanwhile, 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.
Disclosure of Invention
Aiming at the prior art, the invention provides an internal and external mixed combustion engine 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.
The invention is realized by the following technical scheme:
an internal and external mixed combustion engine 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, and the steam outlet end of the steam generator is connected with the gas turbine;
the gas turbine is a multi-rotor gas turbine and comprises a first rotor system and a second rotor system;
the first rotor system comprises a first rotating shaft, a first motor, a first gas compressor, a first turbine and a first combustion chamber, wherein the first motor, the first gas compressor and the first turbine are sequentially sleeved on the first rotating shaft; the air outlet end of the first air compressor is connected with the air inlet end of the first combustion chamber; the exhaust end of the first combustion chamber is connected with the air inlet end of the first turbine;
the second rotor system comprises a second rotating shaft, a second turbine and a second motor, the second turbine and the second motor are sleeved on the second rotating shaft, the exhaust end of the first turbine is connected with the air inlet end of the second turbine, and the exhaust end of the second turbine is connected with the air inlet end of the steam generator;
the first rotating shaft and the second rotating shaft are coaxially arranged, the first rotating shaft is arranged in front of the second rotating shaft, and the first rotating shaft and the second rotating shaft are decoupled (the rotating speeds are not necessarily the same, so that the pneumatic design of the turbine can be flexibly matched); the exhaust end of the first turbine is connected with the air inlet end of the second turbine, tail gas exhausted by the first turbine can push the second turbine to rotate to do work, and the tail gas after doing work is exhausted through the exhaust end.
The connection position of the steam outlet end of the steam generator and the gas turbine comprises any one or two or three or four of the following four positions:
(1) the connecting position is located at the air inlet end of the first combustion chamber of the gas turbine, steam is premixed with the working medium before the working medium enters the combustion chamber, and the working medium and the steam are uniformly distributed to serve as a new combustion working medium.
(2) The connection location is located in a first combustion chamber of the gas turbine, and steam is injected into the first combustion chamber to directly perform wet combustion in the first combustion chamber.
Furthermore, the steam outlet end of the steam generator can be connected with the first combustion chamber through a pipeline, the steam is connected into the first combustion chamber through the pipeline, a steam nozzle or a straight-through pipe can be arranged at the tail end of the pipeline, and the steam is added into the first combustion chamber through the steam nozzle or the straight-through pipe.
Furthermore, a pressurizer can be arranged at the position of the pipeline or the steam nozzle, and the steam is pressurized before entering the first combustion chamber, so that the pressure of the steam entering the first combustion chamber is increased, and the full combustion of the fuel is facilitated.
Above two kinds of hookup locations, steam all gets into the first combustion chamber finally and participates in the burning, and the theory of operation is: when the water vapor is sprayed to the fuel in the high-temperature combustion, the water vapor 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.
(3) The connection location is located at the front end of a first turbine of the gas turbine, from which steam is injected to further propel the first turbine to produce work.
(4) The connection location is between a first turbine and a second turbine of the gas turbine.
Furthermore, the first motor is a starting integrated motor, when the first compressor is started, the starting integrated motor is firstly used as a motor to drive the first compressor to rotate, and is released after the first compressor is accelerated to be capable of operating independently, and then the starting integrated motor is used as a generator, and the first turbine rotates to drive the first rotating shaft to drive the first motor to generate electricity.
Furthermore, a diffuser can be arranged at the joint of the first gas compressor and the first combustion chamber; the working medium is compressed by the first compressor and then diffused by the diffuser, and then enters the first combustion chamber.
Further, the first combustion chamber can be an annular backflow combustion chamber or an axial flow combustion chamber or a single-barrel combustion chamber or a baffled combustion chamber, the axis of the first combustion chamber is coaxial with the first rotating shaft, is arranged around the first rotating shaft and is positioned at the periphery of the first compressor and/or the first turbine.
Further, a thrust bearing and a thrust disc may be disposed on the first rotating shaft and/or the second rotating shaft.
Further, at least one radial bearing may be disposed on the first rotating shaft and/or the second rotating shaft. Specifically, for the first rotor system, the radial bearing may be disposed at the front end of the first rotating shaft to solve the problems of the cantilever at the front end of the first rotating shaft being too long and the rotating shaft being deviated due to the magnetic force of the motor; in addition, the radial bearing can be arranged on one side or two sides of the first motor, and can also be arranged between the first compressor and the first turbine.
Further, the first turbine can be arranged in one, two or more, and when two or more, the first turbine is arranged in series at the tail end of the first rotating shaft in parallel. A radial bearing may be disposed between adjacent first turbines. The high-temperature gas discharged from the first combustion chamber sequentially pushes each first turbine to rotate to do work. When the connection position of the steam outlet end of the steam generator and the gas turbine is located at the front end of the first turbine, the steam of the steam generator sequentially pushes each first turbine to rotate to do work.
Further, the second turbine can be arranged in one, two or more, and when two or more, the second turbine is arranged in parallel and in series at the tail end of the second rotating shaft in sequence. A radial bearing may be disposed between adjacent second turbines. The gas exhausted by the first turbine pushes each second turbine to rotate to do work.
Further, when the pressure drop ratio of the first compressor is high, more than two first turbines and/or more than two second turbines can be arranged, so that the pressure difference generated by the first compressor is fully utilized, and high power generation efficiency is obtained.
Furthermore, the internal and external mixed combustion engine also 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.
Furthermore, in the first rotor system, a first gas compressor, a first motor and a first turbine are sequentially arranged on a first rotating shaft, a radial bearing is arranged on the first rotating shaft and between the first gas compressor and the first motor, a first thrust disc is arranged on the first rotating shaft and between the first motor and the first turbine, a pair of first opposite side thrust discs are arranged on a stator surrounding the first rotating shaft and the first motor, the first thrust disc is positioned between the pair of first opposite side thrust discs and between the first opposite side thrust discs and the thrust bearing, and a radial bearing is arranged on the first rotating shaft and on the air inlet side of the first turbine;
the second rotor system sets gradually second turbine, second motor in the second pivot, second pivot both ends set up radial bearing, in the second pivot, be located and set up the second thrust dish between second turbine and the second motor, encircle and set up a pair of second contralateral thrust dish on the stator of second pivot and second motor, the second thrust dish be located between a pair of second contralateral thrust dish, and its with set up thrust bearing between the second contralateral thrust dish.
Furthermore, in the first rotor system, a first compressor, a first motor and a first turbine are sequentially arranged on a first rotating shaft, thrust bearings are arranged on a back gas surface of the first compressor and a gas inlet surface of the first turbine, and radial bearings are arranged on the first rotating shaft and at two ends of the first motor;
the second rotor system sets gradually second turbine, second motor in the second pivot, second pivot both ends set up radial bearing, in the second pivot, be located and set up the second thrust dish between second turbine and the second motor, encircle and set up a pair of second contralateral thrust dish on the stator of second pivot and second motor, the second thrust dish be located between a pair of second contralateral thrust dish, and its with set up thrust bearing between the second contralateral thrust dish.
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 produce steam; part of generated steam is injected back into the gas turbine, and during practical application, the flow of the steam injected back 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 to supplement the water evaporated into the steam.
The internal and external mixed gas turbine can effectively recover the waste heat of the tail gas of the gas turbine (the steam in the tail gas is condensed and then returns to the water tank to be evaporated again to be injected into a combustion chamber of the gas turbine as steam), thereby realizing the combined utilization of the gas and the steam of the gas turbine, improving the efficiency of the gas turbine and reducing 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. The gas turbine adopts a multi-rotor gas turbine, so that the power generation efficiency is higher (the first rotating shaft and the second rotating shaft can both rotate to do work and are both power generation shafts, and the two power generation shafts are decoupled, so that the rotating speeds are not necessarily the same, and the pneumatic design of the turbine can be flexibly matched conveniently). The number of bearings on the rotating shaft of the multi-rotor gas turbine is less, the length of the rotating shaft is shorter, the overall length of equipment is shorter, the integration is higher, the coaxiality is easy to guarantee, and the design and the processing are easier. 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.
Drawings
FIG. 1: the structure of the internal and external mixed combustion engine is schematically shown.
FIG. 2: the structure of the gas turbine is shown schematically.
FIG. 3: schematic structural diagram of a gas turbine rotor system (example 3).
FIG. 4: schematic structural diagram of a gas turbine rotor system (example 4).
Wherein, 1, a gas turbine; 2. a steam generator; 3. a condenser; 4. a pump; 5. tail gas; 6. steam; 7. condensing water; 106. a diffuser; 107. an airway; 108. a stator; 100. a first rotating shaft; 200. a first motor 200; 300. a first compressor; 400. a first turbine; 500. a first combustion chamber; 600. a second turbine; 700. a second rotating shaft; 800. a second motor.
Detailed Description
The present invention will be further described with reference to the following examples. However, the scope of the present invention is not limited to the following examples. It will be understood by those skilled in the art that various changes and modifications may be made to the invention without departing from the spirit and scope of the invention.
EXAMPLE 1 internal and external hybrid Combustion Engine
An internal and external mixed combustion engine comprises a gas turbine 1, a steam generator 2 and a condenser 3, 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 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.
When the steam generator 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 gas turbine 1 is a multi-rotor gas turbine, and includes a first rotor system and a second rotor system.
The first rotor system comprises a first rotating shaft 100, a first motor 200, a first compressor 300, a first turbine 400 and a first combustion chamber 500, as shown in fig. 2, the first motor 200, the first compressor 300 and the first turbine 400 are sequentially sleeved on the first rotating shaft 100; the air outlet end of the first compressor 300 is connected with the air inlet end of the first combustion chamber 500; the exhaust end of the first combustion chamber 500 is connected to the intake end of the first turbine 400.
The second rotor system includes a second rotating shaft 700, a second turbine 600 and a second motor 800, as shown in fig. 2, the second turbine 600 and the second motor 800 are both sleeved on the second rotating shaft 700, an exhaust end of the first turbine 400 is connected with an air inlet end of the second turbine 600, and an exhaust end of the second turbine 600 is connected with an air inlet end of the steam generator 2.
The first rotating shaft 100 and the second rotating shaft 700 are coaxially arranged, and the first rotating shaft 100 is arranged in front of the second rotating shaft 700, so that the first rotating shaft 100 and the second rotating shaft 700 are decoupled (the rotating speeds are not required to be the same, and the pneumatic design of the turbine can be flexibly matched); the exhaust end of the first turbine 400 is connected with the intake end of the second turbine 600, the exhaust gas discharged from the first turbine 400 can push the second turbine 600 to rotate to do work, and the exhaust gas is discharged through the exhaust end after the work is done.
The first motor 200 is a starting integrated motor, when the first compressor 300 is started, the starting integrated motor firstly serves as a motor to drive the first compressor 300 to rotate, and after the first compressor 300 is accelerated to be capable of operating independently, the starting integrated motor is disengaged and serves as a generator, and the first turbine 400 rotates to drive the first rotating shaft 100 to further drive the first motor 200 to generate electricity.
The connection between the first compressor 300 and the first combustion chamber 500 may further include a diffuser 106, that is: the air outlet end of the first compressor 300 is communicated with the diffuser 106, and the air outlet end of the diffuser 106 is communicated with the air inlet end of the first combustion chamber 500; the working medium is compressed by the first compressor 300 and expanded by the diffuser 106, and then enters the first combustion chamber 500.
The first combustion chamber 500 may be an annular backflow combustion chamber or an axial flow combustion chamber or a single-barrel combustion chamber or a baffled combustion chamber, and the axis of the first combustion chamber 500 is coaxial with the first rotating shaft 100, is arranged around the first rotating shaft 100, and is located at the periphery of the first compressor 300 and/or the first turbine 400.
The first rotating shaft 100 and/or the second rotating shaft 700 may be provided with a thrust bearing and a thrust disc.
At least one radial bearing may be disposed on the first rotating shaft 100 and/or the second rotating shaft 700. Specifically, for the first rotor system, a radial bearing may be disposed at the front end of the first rotating shaft 100 to solve the problems of the cantilever at the front end of the first rotating shaft 100 being too long and the rotating shaft being deviated due to the magnetic force of the motor; in addition, a radial bearing may be disposed at one side or both sides of the first motor 200, and may be disposed between the first compressor 300 and the first turbine 400. The fewer the number of bearings on the rotating shaft, the shorter the length of the rotating shaft, the shorter the overall length of the equipment, the higher the integration, the easy guarantee of the coaxiality and the easier design and processing.
The first turbine 400 may be provided in one, two or more, and when two or more are provided, they are connected in series in parallel to the rear end of the first shaft 100. A radial bearing may be disposed between the adjacent first turbines 400. The high-temperature gas discharged from the first combustor 500 sequentially pushes each first turbine 400 to rotate and apply work. When the connection position of the steam outlet end of the steam generator and the gas turbine is located at the front end of the first turbine 400, the steam of the steam generator sequentially pushes each first turbine 400 to rotate to do work.
The second turbine 600 may be provided in one, two or more, and when two or more are provided, they are connected in series in parallel to the rear end of the second rotating shaft 700. A radial bearing may be disposed between the adjacent second turbines 600. The gas exhausted from the first turbine 400 in turn pushes each second turbine 600 to rotate and apply work.
When the pressure drop ratio of the first compressor 300 is high, more than two first turbines 400 and/or second turbines 600 may be provided, so as to fully utilize the pressure difference generated by the first compressor 300 and obtain high power generation efficiency.
The power of the first motor 200 is 20-30 KW, the power of the second motor 800 is 120-130 KW, and the total power of the gas turbine is 140-160 KW.
When the gas turbine works, the first gas compressor 300 sucks a working medium 8 (generally air) from the outside, the working medium 8 is compressed and pressurized by the first gas compressor 300, then enters the first combustion chamber 500 and is mixed and combusted with injected fuel to generate high-temperature and high-pressure gas, the high-temperature gas enters the first turbine 400 from the gas outlet end of the first combustion chamber 500 and pushes the first turbine 400 to do work, the first turbine 400 drives the coaxial first motor 200 to generate electricity and drives the first gas compressor 300 to work, and partial chemical energy of gas or liquid fuel is converted into mechanical energy and electric energy is output; after the high-temperature gas does work on the first turbine 400, the high-temperature gas continues to do work on the second turbine 600, and the second turbine 600 drives the coaxial second motor 800 to generate electricity; the gas after working on the second turbine 600 is discharged from the exhaust end as the tail gas 5, enters the steam generator 2, and after heat exchange, part of the steam 6 discharged from the steam generator 2 is injected back into the gas turbine 1. The first rotating shaft 100 and the second rotating shaft 700 can rotate to do work and are power generation shafts, the two power generation shafts are decoupled, the rotating speeds are not required to be the same, and the pneumatic design of the turbine can be flexibly matched conveniently.
The connection position of the steam outlet end of the steam generator 2 and the gas turbine 1 is one, two, three or four of the following three positions:
(1) the connection position is located at the air inlet end (specifically, the rear end of the diffuser 106 in the embodiment) of the first combustion chamber 500 of the gas turbine 1, the steam 6 is injected from the rear end of the diffuser 106, premixing is realized before entering the first combustion chamber 500, the working medium 8 and the steam 6 are uniformly distributed and used as a new combustion working medium, the flow rate is larger than that of pure air, and the efficiency of the gas turbine is higher;
(2) the connection point is located in the first combustion chamber 500 of the gas turbine 1, and the steam 6 is injected into the first combustion chamber 500 and directly wet-burned in the first combustion chamber 500.
In specific application, the steam outlet end of the steam generator 2 can be connected with the first combustion chamber 500 through a pipeline, the steam 6 is connected into the first combustion chamber 500 through the pipeline, a steam nozzle or a straight-through pipe can be further arranged at the tail end of the pipeline, and the steam 6 is added into the first combustion chamber 500 through the steam nozzle or the straight-through pipe. A pressurizer may be further provided at the pipe or the steam nozzle to pressurize the steam 6 before the steam 6 enters the first combustion chamber 500, so as to increase the pressure of the steam 6 entering the first combustion chamber 500, which is more favorable for the sufficient combustion of the fuel.
(3) The connection location is located at the front end of the first turbine 400 of the gas turbine 1, and the steam 6 is injected from the front end of the first turbine 400 to further drive the first turbine 400 to do work.
(4) The connection location is between the first turbine 400 and the second turbine 600 of the gas turbine 1.
The rotor system of the gas turbine includes, but is not limited to, the forms shown in the following embodiments 3, 4.
EXAMPLE 3 rotor System
As shown in fig. 3, in the first rotor system, a first compressor 300, a first motor 200, and a first turbine 400 are sequentially disposed on a first rotor shaft 100, a radial bearing is disposed on the first rotor shaft 100 between the first compressor 300 and the first motor 200, a first thrust disc is disposed on the first rotor shaft 100 between the first motor 200 and the first turbine 400, a pair of first pair of side thrust discs is disposed on a stator 108 surrounding the first rotor shaft 100 and the first motor 200, the first thrust disc is disposed between the pair of first pair of side thrust discs and a thrust bearing is disposed between the first pair of side thrust discs and the first pair of side thrust discs, and a radial bearing is disposed on the first rotor shaft 100 on an air inlet side of the first turbine 400;
the second rotor system sets gradually second turbine 600, second motor 800 in the second pivot 700, the two ends of second pivot 700 set up radial bearing, on the second pivot 700, be located and set up the second thrust dish between second turbine 600 and the second motor 800, set up a pair of second contralateral thrust dish on encircleing the stator of second pivot 700 and second motor 800, the second thrust dish be located between a pair of second contralateral thrust dish, and its with set up thrust bearing between the second contralateral thrust dish.
EXAMPLE 4 rotor System
As shown in fig. 4, in the first rotor system, a first compressor 300, a first motor 200, and a first turbine 400 are sequentially disposed on a first rotating shaft 100, thrust bearings are disposed on a back air surface of the first compressor 300 and an air inlet surface of the first turbine 400, and radial bearings are disposed on the first rotating shaft 100 and at two ends of the first motor 200;
the second rotor system sets gradually second turbine 600, second motor 800 on the second pivot 700, the two ends of second pivot 700 set up radial bearing, lie in on the second pivot 700 and set up the second thrust dish between second turbine 600 and the second motor 800, encircle and set up a pair of second contralateral thrust dish on the stator of second pivot 700 and second motor 800, the second thrust dish lie in between a pair of second contralateral thrust dish, and its with set up thrust bearing between the second contralateral thrust dish.
Although the specific embodiments of the present invention have been described with reference to the examples, the scope of the present invention is not limited thereto, and those skilled in the art will appreciate that various modifications and variations can be made without inventive effort by those skilled in the art based on the technical solution of the present invention.

Claims (10)

1. An internal and external mixed combustion engine, characterized in that: the system comprises a gas turbine and a steam generator, wherein the exhaust end of the gas turbine is connected with the gas inlet end of the steam generator, and the steam outlet end of the steam generator is connected with the gas turbine;
the gas turbine is a multi-rotor gas turbine and comprises a first rotor system and a second rotor system;
the first rotor system comprises a first rotating shaft, a first motor, a first gas compressor, a first turbine and a first combustion chamber, wherein the first motor, the first gas compressor and the first turbine are sequentially sleeved on the first rotating shaft; the air outlet end of the first air compressor is connected with the air inlet end of the first combustion chamber; the exhaust end of the first combustion chamber is connected with the air inlet end of the first turbine;
the second rotor system comprises a second rotating shaft, a second turbine and a second motor, the second turbine and the second motor are sleeved on the second rotating shaft, the exhaust end of the first turbine is connected with the air inlet end of the second turbine, and the exhaust end of the second turbine is connected with the air inlet end of the steam generator;
the first rotating shaft and the second rotating shaft are coaxially arranged;
the connection position of the steam outlet end of the steam generator and the gas turbine comprises any one or two or three or four of the following four positions:
(1) the connecting position is positioned at the air inlet end of the first combustion chamber of the gas turbine;
(2) the connection location is located within a first combustion chamber of the gas turbine;
(3) the connection location is at a forward end of a first turbine of the gas turbine;
(4) the connection location is between a first turbine and a second turbine of the gas turbine.
2. The internal-external hybrid combustion engine according to claim 1, wherein: when the connection position of the steam generator (2) is positioned in a first combustion chamber of the gas turbine, the steam outlet end of the steam generator is connected with the first combustion chamber through a pipeline; or: the steam outlet end of the steam generator is connected with the first combustion chamber through a pipeline, and a steam nozzle or a straight-through pipe is arranged at the tail end of the pipeline;
and/or: a pressurizer is arranged at the pipeline or the steam nozzle, and the steam is pressurized before entering the first combustion chamber.
3. The internal-external hybrid combustion engine according to claim 1, wherein: the first motor is a starting integrated motor.
4. The internal-external hybrid combustion engine according to claim 1, wherein: the first combustion chamber is an annular backflow combustion chamber or an axial flow combustion chamber or a single-cylinder combustion chamber or a baffling combustion chamber, the axis of the first combustion chamber is coaxial with the first rotating shaft, is arranged around the first rotating shaft and is positioned on the periphery of the first gas compressor and/or the first turbine.
5. The internal-external hybrid combustion engine according to claim 1, wherein: and a thrust bearing and a thrust disc are arranged on the first rotating shaft and/or the second rotating shaft.
6. The internal-external hybrid combustion engine according to claim 1, wherein: at least one radial bearing is arranged on the first rotating shaft and/or the second rotating shaft;
for the first rotor system, the radial bearing is arranged at the front end of the first rotating shaft, one side or two sides of the first motor, or between the first compressor and the first turbine.
7. The internal-external hybrid combustion engine according to claim 1, wherein: the number of the first turbines is one, two or more, and when the number of the first turbines is two or more, the first turbines are sequentially connected in parallel at the tail end of the first rotating shaft in series;
and/or: one, two or more second turbines are arranged, and when two or more second turbines are arranged, the second turbines are sequentially connected in parallel at the tail end of the second rotating shaft in series;
and/or: a radial bearing is arranged between the adjacent first turbines;
and/or: and a radial bearing is arranged between the adjacent second turbines.
8. The internal-external hybrid combustion engine according to claim 1, wherein: the internal and external mixed combustion engine also 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 according to claim 1, wherein:
the first rotor system is characterized in that a first gas compressor, a first motor and a first turbine are sequentially arranged on a first rotating shaft, a radial bearing is arranged on the first rotating shaft and between the first gas compressor and the first motor, a first thrust disc is arranged on the first rotating shaft and between the first motor and the first turbine, a pair of first opposite side thrust discs are arranged on a stator surrounding the first rotating shaft and the first motor, the first thrust disc is positioned between the pair of first opposite side thrust discs, a thrust bearing is arranged between the first opposite side thrust discs and the first opposite side thrust discs, and a radial bearing is arranged on the first rotating shaft and on the first turbine air inlet side;
the second rotor system sets gradually second turbine, second motor in the second pivot, second pivot both ends set up radial bearing, in the second pivot, be located and set up the second thrust dish between second turbine and the second motor, encircle and set up a pair of second contralateral thrust dish on the stator of second pivot and second motor, the second thrust dish be located between a pair of second contralateral thrust dish, and its with set up thrust bearing between the second contralateral thrust dish.
10. The internal-external hybrid combustion engine according to claim 1, wherein:
the first rotor system is characterized in that a first compressor, a first motor and a first turbine are sequentially arranged on a first rotating shaft, thrust bearings are arranged on the back gas surface of the first compressor and the gas inlet surface of the first turbine, and radial bearings are arranged on the first rotating shaft and at two ends of the first motor;
the second rotor system sets gradually second turbine, second motor in the second pivot, second pivot both ends set up radial bearing, in the second pivot, be located and set up the second thrust dish between second turbine and the second motor, encircle and set up a pair of second contralateral thrust dish on the stator of second pivot and second motor, the second thrust dish be located between a pair of second contralateral thrust dish, and its with set up thrust bearing between the second contralateral thrust dish.
CN202111034470.6A 2021-09-03 2021-09-03 Internal and external mixed combustion engine Pending CN113756900A (en)

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WO2023030468A1 (en) * 2021-09-03 2023-03-09 靳普科技(北京)有限公司 Internal/external hybrid combustion engine
CN114320604A (en) * 2022-01-11 2022-04-12 永旭腾风新能源动力科技（北京）有限公司 Gas turbine hydrogen supply system and mobile hydrogen supply station

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