CN107023317A - A kind of reheat-type multistage axial turbine and its method of work - Google Patents

A kind of reheat-type multistage axial turbine and its method of work Download PDF

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Publication number
CN107023317A
CN107023317A CN201710380623.XA CN201710380623A CN107023317A CN 107023317 A CN107023317 A CN 107023317A CN 201710380623 A CN201710380623 A CN 201710380623A CN 107023317 A CN107023317 A CN 107023317A
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CN
China
Prior art keywords
hot
flow path
stator blade
chamber
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710380623.XA
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Chinese (zh)
Inventor
韩万龙
李红智
姚明宇
王月明
聂鹏
杨玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Thermal Power Research Institute Co Ltd
Huaneng Power International Inc
Original Assignee
Xian Thermal Power Research Institute Co Ltd
Huaneng Power International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Thermal Power Research Institute Co Ltd, Huaneng Power International Inc filed Critical Xian Thermal Power Research Institute Co Ltd
Priority to CN201710380623.XA priority Critical patent/CN107023317A/en
Publication of CN107023317A publication Critical patent/CN107023317A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D1/00Non-positive-displacement machines or engines, e.g. steam turbines
    • F01D1/02Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
    • F01D1/04Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines traversed by the working-fluid substantially axially
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D1/00Non-positive-displacement machines or engines, e.g. steam turbines
    • F01D1/02Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines
    • F01D1/10Non-positive-displacement machines or engines, e.g. steam turbines with stationary working-fluid guiding means and bladed or like rotor, e.g. multi-bladed impulse steam turbines having two or more stages subjected to working-fluid flow without essential intermediate pressure change, i.e. with velocity stages
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08Cooling; Heating; Heat-insulation
    • F01D25/10Heating, e.g. warming-up before starting

Abstract

The invention discloses a kind of reheat-type multistage axial turbine and its method of work, the lower end of movable vane is connected with wheel hub, the upper end of stator blade is connected with casing, the lower end of stator blade is flexibly connected with wheel hub, casing is provided with the ring-like chamber of some hot fluid inlets and the ring-like chamber of some hot fluid outlet ports, hot flow path in hot flow path and some second is offered in some first in casing, hot flow path in the 3rd is provided with stator blade, one stator blade one ring-like chamber of hot fluid inlet of correspondence, one ring-like chamber of hot fluid outlet ports, hot flow path in hot flow path and one second in one first, the hot fluid medium outlet of the ring-like chamber of hot fluid inlet is successively through hot flow path in correspondence first, correspondingly hot flow path is connected with the hot fluid medium entrance of the ring-like chamber of corresponding hot fluid outlet ports in hot flow path and corresponding second in the 3rd in stator blade, the turbine and its method of work can effectively improve the thermal efficiency of multistage axial turbine, and it can effectively avoid the pressure loss of main flow medium.

Description

A kind of reheat-type multistage axial turbine and its method of work
Technical field
The present invention relates to a kind of multistage axial turbine and its method of work, and in particular to a kind of reheat-type multistage axial turbine And its method of work.
Background technology
Turbine is widely used in energy industry, and it is Brayton Cycle system, Rankine cycle system and above two Gaseous state or supercritical fluid interior energy are converted into the important rotating machinery of shaft work in the combined system of system.Using In multistage axial turbine, during gaseous state or supercritical fluid acting, the temperature of fluid can be reduced accordingly, and the drop of temperature The low interior energy grade for causing fluid to do work reduction.If can realize, fluid decalescence and does work at high temperature dot, at low temperature point Isothermal heat release, then can make the efficiency of the circulatory system be more nearly the ideal cycle efficiency of system.At present, in order to improve the circulatory system Efficiency, researcher proposes thermal technology again, is:Fluid is drawn from the outlet of high pressure cylinder turbine and heated, after heating Fluid is delivered to the import of intermediate pressure cylinder turbine again, fluid promotes intermediate pressure cylinder turbine to do work again, and the method can imitate system circulation Rate lifting more than 1%.Space needed for the thermal technology again of the existing circulatory system is larger, complicated, so being applicable only to large-scale Between the high pressure cylinder and low pressure (LP) cylinder of Steam Turbine.Above-mentioned technology, though the thermal efficiency of electricity generation system can be improved to a certain extent, But it cannot be used for improving the thermal efficiency of high pressure cylinder turbine, and mainstream fluid can also necessarily bring certain when flowing through reheating passage Pressure loss, the scope of application is very narrow.
The content of the invention
It is an object of the invention to overcoming the shortcoming of above-mentioned prior art there is provided a kind of reheat-type multistage axial turbine and Its method of work, the turbine and its method of work can effectively improve the thermal efficiency of multistage axial turbine, and can be effective The pressure loss for avoiding main flow medium.
To reach above-mentioned purpose, reheat-type multistage axial turbine of the present invention include casing, wheel hub, some movable vanes and Some stator blades, the direction that each movable vane circulates with each stator blade along main flow working medium is interspersed successively, and lower end and the wheel hub phase of movable vane Connection, the upper end of stator blade is connected with casing, and the lower end of stator blade is flexibly connected with wheel hub, and casing is provided with some hot fluid inlets Hot flow path in hot flow path and some second is offered in some first in ring-like chamber and the ring-like chamber of some hot fluid outlet ports, casing, Hot flow path in the 3rd is provided with stator blade, stator blade correspondence one the ring-like chamber of hot fluid inlet, a hot fluid outlet ports are ring-like Chamber, hot flow path in hot flow path and one second in one first, the hot fluid medium outlet of the ring-like chamber of hot fluid inlet is passed through successively Correspondence first in hot flow path, correspondence stator blade in the 3rd in hot flow path and correspondence second in hot flow path and corresponding hot fluid outlet ports ring The hot fluid medium entrance of die cavity is connected.
The side of wheel hub is provided with some annular grooves, wherein, an annular groove is corresponded in a stator blade, the lower end of stator blade It is embedded in correspondence annular groove.
The cross section of hot flow path is square, trapezoidal, polygon, circle or ellipse in first;
The cross section of hot flow path is square, trapezoidal, polygon, circle or ellipse in second;
The cross section of hot flow path is square, trapezoidal, polygon, circle or ellipse in 3rd.
Hot flow path is straight passage structures, channel design of turning back, sudden expansion structure, sudden contraction structure, rib structure, impact chamber in first Cell structure or impingement sleeve structure;
Hot flow path is straight passage structures, channel design of turning back, sudden expansion structure, sudden contraction structure, rib structure, impact chamber in second Cell structure or impingement sleeve structure;
Hot flow path is straight passage structures, channel design of turning back, sudden expansion structure, sudden contraction structure, rib structure, impact chamber in 3rd Cell structure or impingement sleeve structure.
The direction circulated along main flow working medium, the size of each stator blade gradually increases.
The direction circulated along main flow working medium, the size of each movable vane gradually increases.
The method of work of reheat-type multistage axial turbine of the present invention comprises the following steps:
The hot fluid medium of hot fluid inlet ring-like chamber output is successively through the in hot flow path, correspondence stator blade in correspondence first Hot flow path is entered in the ring-like chamber of correspondence hot fluid outlet ports in hot flow path and corresponding second in three, and realization adds to stator blade and casing Heat, main flow medium flows through the passage between wheel hub and casing, wherein, main flow medium does work to movable vane, makes the temperature of main flow medium And pressure declines, main flow medium is exchanged heat with stator blade and casing, raises the temperature of main flow medium.
The invention has the advantages that:
Reheat-type multistage axial turbine and its method of work of the present invention are in concrete operations, if being offered in casing It is provided with hot flow path in the 3rd in dry first in hot flow path and some second in hot flow path, stator blade, the ring-like chamber of hot fluid inlet is defeated The hot fluid medium gone out is successively through hot-fluid in hot flow path in the 3rd in hot flow path, correspondence stator blade in correspondence first and correspondence second Road is entered in correspondence hot fluid outlet ports ring-like chamber, realizes the heating to stator blade and casing, main flow medium when flowing through, by with Stator blade and casing are exchanged heat, and complete the heating to main flow medium, improve the temperature of main flow medium at turbine imports at different levels, so that The effective thermal efficiency for improving multistage axial turbine, it is to avoid thermal technology can only improve high pressure cylinder steam turbine and and low pressure (LP) cylinder to tradition again The shortcoming of the acting fluid inlet temperature of working media temperature and low pressure (LP) cylinder steam turbine between steam turbine.In addition, it is necessary to illustrate , of the invention not need separate space to place heat structure again, main flow medium need not enter the independent passage of heat again, not have Additional pressure drops, the scope of application is more wide.
Brief description of the drawings
Fig. 1 is structural representation of the invention;
Fig. 2 is fundamental diagram of the invention.
Wherein, 1 it is movable vane, 2 be wheel hub, 3 be stator blade, 4 be the ring-like chamber of hot fluid outlet ports, 5 be casing, 6 is hot in the 3rd Runner, 7 be the ring-like chamber of hot fluid inlet, 8 be hot flow path in first, 9 be hot flow path in second.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings:
With reference to Fig. 1, reheat-type multistage axial turbine of the present invention includes casing 5, wheel hub 2, some movable vanes 1 and some Stator blade 3, each movable vane 1 is interspersed successively with each stator blade 3 along the direction that main flow working medium circulates, and lower end and the phase of wheel hub 2 of movable vane 1 Connection, the upper end of stator blade 3 is connected with casing 5, and the lower end of stator blade 3 is flexibly connected with wheel hub 2, and casing 5 is provided with some hot-fluids Hot flow path 8 and some second in some first is offered in the ring-like chamber 7 of body import and the ring-like chamber 4 of some hot fluid outlet ports, casing 5 Provided with hot flow path 6 in the 3rd in interior hot flow path 9, stator blade 3, ring-like chamber 7 of one hot fluid inlet of correspondence of stator blade 3, one The ring-like chamber 4 of hot fluid outlet ports, hot flow path 9, the heat of the ring-like chamber 7 of hot fluid inlet in hot flow path 8 and one second in one first Fluid media (medium) outlet is successively through heat in hot flow path 6 in the 3rd in hot flow path 8, correspondence stator blade 3 in correspondence first and correspondence second Runner 9 is connected with the hot fluid medium entrance of the ring-like chamber of corresponding hot fluid outlet ports 4.
The side of wheel hub 2 is provided with some annular grooves, wherein, an annular groove is corresponded under a stator blade 3, stator blade 3 End is embedded in correspondence annular groove;The cross section of hot flow path 8 is square, trapezoidal, polygon, circle or ellipse in first; The cross section of hot flow path 9 is square, trapezoidal, polygon, circle or ellipse in second;The cross section of hot flow path 6 is in 3rd Square, trapezoidal, polygon, circle or ellipse.Hot flow path 8 is straight passage structures, channel design of turning back, sudden expansion knot in first Structure, sudden contraction structure, rib structure, impulse chamber structure or impingement sleeve structure;Hot flow path 9 is straight passage structures, turned back in second Channel design, sudden expansion structure, sudden contraction structure, rib structure, impulse chamber structure or impingement sleeve structure;Hot flow path 6 is in 3rd Straight passage structures, channel design of turning back, sudden expansion structure, sudden contraction structure, rib structure, impulse chamber structure or impingement sleeve structure.
The direction circulated along main flow working medium, the size of each stator blade 3 gradually increases;The direction circulated along main flow working medium, it is each dynamic The size of leaf 1 gradually increases.
The method of work of reheat-type multistage axial turbine of the present invention comprises the following steps:
The hot fluid medium that the ring-like chamber 7 of hot fluid inlet is exported is successively through in hot flow path 8, correspondence stator blade 3 in correspondence first The 3rd in hot flow path 6 and correspondence second hot flow path 9 enter in correspondence hot fluid outlet ports ring-like chamber 4, realize to stator blade 3 and The heating of casing 5, main flow medium flows through the passage between wheel hub 2 and casing 5, wherein, main flow medium does work to movable vane 1, makes master The temperature and pressure of flow medium decline, and main flow medium is exchanged heat with stator blade 3 and casing 5, make the temperature of main flow medium high.
The present invention connects the inner wall surface of casing 5, the surface of stator blade 3 and main flow medium by the heating to stator blade 3 and casing 5 The temperature of contacting surface realizes the heat exchange to main flow medium apparently higher than the temperature of main flow medium, and the heat of hot fluid medium is passed with heat Lead, heat convection, the mode of heat radiation are transmitted to stator blade 3 and casing 5, so as to improve the temperature of main flow medium, main flow medium is every Stream passes through a row movable vane 1, and main flow medium then does work to the movable vane 1 reduces the temperature and pressure of main flow medium, and main flow medium is every By a row stator blade 3, the mode that can be transferred through heat exchange improves the temperature parameter of main flow medium.Next stage turbine blade is come Say, in the case where mass flow is constant, the inlet temperature of this grade of turbine can be improved;For multistage axial turbine, often Level stator blade 3 all uses above-mentioned reheating scheme, then can greatly improve the acting ability of multistage turbine, improves turbine and cyclic system The efficiency of system.
The present invention does not influence and limited the flowing of main flow medium, it is not necessary to additional space, available for single shaft or multiaxis, list The reheat-type multistage axial turbine of cylinder or multi-cylinder, can be applied to ground supercritical carbon dioxide Brayton cycle electricity generation system, The equipment such as industrial turbine.
Technical scheme is not limited to the limitation of above-mentioned specific embodiment, and every technique according to the invention scheme is done The technology deformation gone out, each falls within protection scope of the present invention.

Claims (7)

1. a kind of reheat-type multistage axial turbine, it is characterised in that including casing (5), wheel hub (2), some movable vanes (1) and some Stator blade (3), each movable vane (1) is interspersed successively with each stator blade (3) along the direction that main flow working medium circulates, and the lower end of movable vane (1) It is connected with wheel hub (2), the upper end of stator blade (3) is connected with casing (5), the lower end of stator blade (3) is flexibly connected with wheel hub (2), Casing (5) is provided with the ring-like chamber of some hot fluid inlets (7) and the ring-like chamber of some hot fluid outlet ports (4), casing (5) and offered Hot flow path (6) in the 3rd is provided with hot flow path (9) in hot flow path (8) and some second in some first, stator blade (3), one quiet One ring-like chamber of hot fluid inlet (7) of leaf (3) correspondence, ring-like chamber of hot fluid outlet ports (4), hot flow path (8) in one first And hot flow path (9) in one second, the hot fluid medium outlet of the ring-like chamber of hot fluid inlet (7) is successively through hot-fluid in correspondence first In road (8), correspondence stator blade (3) the 3rd in hot flow path (6) and correspondence second hot flow path (9) and corresponding hot fluid outlet ports it is ring-like The hot fluid medium entrance of chamber (4) is connected.
2. the reheat-type multistage axial turbine according to right can require 1, it is characterised in that wheel hub (2) if side provided with Dry annular groove, wherein, annular groove one stator blade (3) of correspondence, the lower end of stator blade (3) is embedded in correspondence annular groove It is interior.
3. the reheat-type multistage axial turbine according to right can require 1, it is characterised in that the horizontal stroke of hot flow path (8) in first Section is square, trapezoidal, polygon, circle or ellipse;
The cross section of hot flow path (9) is square, trapezoidal, polygon, circle or ellipse in second;
The cross section of hot flow path (6) is square, trapezoidal, polygon, circle or ellipse in 3rd.
4. the reheat-type multistage axial turbine according to right can require 1, it is characterised in that hot flow path (8) is straight in first Channel design, channel design of turning back, sudden expansion structure, sudden contraction structure, rib structure, impulse chamber structure or impingement sleeve structure;
Hot flow path (9) is straight passage structures, channel design of turning back, sudden expansion structure, sudden contraction structure, rib structure, impact chamber in second Cell structure or impingement sleeve structure;
Hot flow path (6) is straight passage structures, channel design of turning back, sudden expansion structure, sudden contraction structure, rib structure, impact chamber in 3rd Cell structure or impingement sleeve structure.
5. the reheat-type multistage axial turbine according to right can require 1, it is characterised in that the side circulated along main flow working medium To the size of each stator blade (3) gradually increases.
6. the reheat-type multistage axial turbine according to right can require 1, it is characterised in that the side circulated along main flow working medium To the size of each movable vane (1) gradually increases.
7. the method for work of the reheat-type multistage axial turbine described in a kind of claim 1, it is characterised in that including following step Suddenly:
The hot fluid medium of the ring-like chamber of hot fluid inlet (7) output is successively through hot flow path (8), correspondence stator blade (3) in correspondence first In the 3rd in hot flow path (6) and correspondence second hot flow path (9) enter in the correspondence ring-like chamber of hot fluid outlet ports (4), realize Heating to stator blade (3) and casing (5), main flow medium flows through the passage between wheel hub (2) and casing (5), wherein, main flow medium Movable vane (1) is done work, declines the temperature and pressure of main flow medium, main flow medium is exchanged heat with stator blade (3) and casing (5), Raise the temperature of main flow medium.
CN201710380623.XA 2017-05-25 2017-05-25 A kind of reheat-type multistage axial turbine and its method of work Pending CN107023317A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108442984A (en) * 2018-03-06 2018-08-24 西安热工研究院有限公司 A kind of micro- thermal process again of steam turbine and implementation system
GB2577932A (en) * 2018-10-12 2020-04-15 Bae Systems Plc Turbine module

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB995643A (en) * 1961-12-27 1965-06-23 Licentia Gmbh Improvements in or relating to multistage steam turbines and installations thereof
US3475107A (en) * 1966-12-01 1969-10-28 Gen Electric Cooled turbine nozzle for high temperature turbine
US5494402A (en) * 1994-05-16 1996-02-27 Solar Turbines Incorporated Low thermal stress ceramic turbine nozzle
JPH1073004A (en) * 1996-08-29 1998-03-17 Toshiba Corp Gas turbine
JPH10103008A (en) * 1996-10-01 1998-04-21 Fuji Electric Co Ltd Steam turbine stationary blade heating method
CN106661951A (en) * 2014-06-27 2017-05-10 三菱日立电力系统株式会社 Stator vane unit and steam turbine
CN206801617U (en) * 2017-05-25 2017-12-26 华能国际电力股份有限公司 A kind of reheat-type multistage axial turbine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB995643A (en) * 1961-12-27 1965-06-23 Licentia Gmbh Improvements in or relating to multistage steam turbines and installations thereof
US3475107A (en) * 1966-12-01 1969-10-28 Gen Electric Cooled turbine nozzle for high temperature turbine
US5494402A (en) * 1994-05-16 1996-02-27 Solar Turbines Incorporated Low thermal stress ceramic turbine nozzle
JPH1073004A (en) * 1996-08-29 1998-03-17 Toshiba Corp Gas turbine
JPH10103008A (en) * 1996-10-01 1998-04-21 Fuji Electric Co Ltd Steam turbine stationary blade heating method
CN106661951A (en) * 2014-06-27 2017-05-10 三菱日立电力系统株式会社 Stator vane unit and steam turbine
CN206801617U (en) * 2017-05-25 2017-12-26 华能国际电力股份有限公司 A kind of reheat-type multistage axial turbine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108442984A (en) * 2018-03-06 2018-08-24 西安热工研究院有限公司 A kind of micro- thermal process again of steam turbine and implementation system
GB2577932A (en) * 2018-10-12 2020-04-15 Bae Systems Plc Turbine module
WO2020074889A1 (en) * 2018-10-12 2020-04-16 Bae Systems Plc Turbine module
US11434776B2 (en) 2018-10-12 2022-09-06 Bae Systems Plc Turbine module
GB2577932B (en) * 2018-10-12 2022-09-07 Bae Systems Plc Turbine module

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