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 PDFInfo
- 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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- 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.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 59
- 230000008602 contraction Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000008676 import Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/02—Non-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
- F01D1/04—Non-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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/02—Non-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
- F01D1/10—Non-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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, 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
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.
Priority Applications (1)
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CN201710380623.XA CN107023317A (en) | 2017-05-25 | 2017-05-25 | A kind of reheat-type multistage axial turbine and its method of work |
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CN201710380623.XA CN107023317A (en) | 2017-05-25 | 2017-05-25 | A kind of reheat-type multistage axial turbine and its method of work |
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Cited By (2)
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 |
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---|---|---|---|---|
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 |
-
2017
- 2017-05-25 CN CN201710380623.XA patent/CN107023317A/en active Pending
Patent Citations (7)
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)
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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