CN106224015B - The overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW - Google Patents
The overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW Download PDFInfo
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- CN106224015B CN106224015B CN201610794919.1A CN201610794919A CN106224015B CN 106224015 B CN106224015 B CN 106224015B CN 201610794919 A CN201610794919 A CN 201610794919A CN 106224015 B CN106224015 B CN 106224015B
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- cylinder
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Classifications
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- 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
- F01D13/00—Combinations of two or more machines or engines
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- 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
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
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- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
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- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/08—Heating, heat-insulating or cooling means
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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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
Abstract
The overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW, it is related to a kind of steam turbine.The present invention solves the problem of cylinder flow losses that existing steam turbine is present are big, cylinder efficiency is low.Front bearing box, the first middle (center) bearing case, the second middle (center) bearing case and rear bearing housing are arranged in frame using landing structure, high pressure cylinder is supported on front bearing box and the first middle (center) bearing case by upper ram's horn, and intermediate pressure cylinder is supported on the first middle (center) bearing case and the second middle (center) bearing case by upper ram's horn；Low pressure (LP) cylinder is arranged in frame using landing structure；Tandem is set successively along its length for high pressure cylinder, intermediate pressure cylinder and low pressure (LP) cylinder, high pressure cylinder, intermediate pressure cylinder and low pressure (LP) cylinder are inside and outside double shell structure, press and be attached between rotor and turbine shafting low pressure rotor by rigid flange shaft coupling in turbine shafting high pressure rotor, turbine shafting, turbine shafting high pressure rotor and turbine shafting low pressure rotor are dual-support structure.The present invention is used for coal fired power generation field.
Description
Technical field
The present invention relates to a kind of clammy condensing turbine, and in particular to a kind of overcritical steam discharges of three cylinder two of 350MW are clammy
Condensing turbine.
Background technology
As the Core equipment of coal fired power generation, the technology and product of steam turbine will be to improve efficiency as target, in high temperature material
A new DM Development Milestone is welcome on the basis of material research and development and a series of advanced technologies.The development of new round coal-fired power generator set
Core is to carry forward vigorously the technologies such as designing technique, manufacturing process and the optimization of Thermal System of raising product, and is related to raising
Steam parameter, flow passage component optimization design, structure optimization, cold end optimization, thermodynamic cycle and system optimization, Advanced Manufacturing Technology etc.
Field.The depth and level of these technical fields development determine that the height of steam turbine property level of new generation and market are competing
Strive power.
To sum up, the cylinder flow losses of existing steam turbine are big, cylinder efficiency is low.
The content of the invention
The present invention provides to solve the problem of cylinder flow losses that existing steam turbine is present are big, cylinder efficiency is low
A kind of 350MW overcritical clammy condensing turbines of the steam discharge of three cylinder two.
The present invention adopts the technical scheme that to solve above-mentioned technical problem：
The overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW of the present invention include front bearing box 1, high pressure cylinder 2, the
Rotor 5 is pressed in one middle (center) bearing case 3, turbine shafting high pressure rotor 4, turbine shafting, it is intermediate pressure cylinder 6, the second middle (center) bearing case 7, low
Cylinder pressure 8, turbine shafting low pressure rotor 9 and rear bearing housing 10, front bearing box 1, the first middle (center) bearing case 3, the and of the second middle (center) bearing case 7
Bearing housing 10 is arranged in frame using landing structure afterwards, and high pressure cylinder 2 is supported in front bearing box 1 and first by upper ram's horn
On bearing housing 3, intermediate pressure cylinder 6 is supported on the first middle (center) bearing case 3 and the second middle (center) bearing case 7 by upper ram's horn；Low pressure (LP) cylinder 8 uses
Ground structure is arranged in frame；High pressure cylinder 2, intermediate pressure cylinder 6 and low pressure (LP) cylinder 8 along its length successively tandem set, high pressure cylinder 2, in
Cylinder pressure 6 and low pressure (LP) cylinder 8 are pressure rotor 5 and vapour in inside and outside double shell structure, turbine shafting high pressure rotor 4, turbine shafting
It is attached between turbine shafting low pressure rotor 9 by rigid flange shaft coupling, turbine shafting high pressure rotor 4 and turbine shaft
It is that low pressure rotor 9 is dual-support structure.
The present invention has the advantages that compared with prior art：
It is excellent that the overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW of the present invention give full play to multistage reactionary style technology
Gesture, each steam end efficiency improves 1-2%；
Senior middle school's air cylinder reduces cylinder leakage vapour, axial locating surface leakage vapour using double-deck high-pressure inner cylinder structure；
Present invention optimization high intermediate pressure cylinder enters vapour structure and governing stage vaporium molded line, optimizes exhaust steam end molded line, reduces flowing
Loss；
Mesolow point cylinder pressure is reduced, improves low pressure operation environment, low pressure (LP) cylinder efficiency is improved；
High, intermediate pressure cylinder pressure stage and low pressure (LP) cylinder part stator blade use fabricated construction, it is ensured that the accuracy of manufacture；
The present invention is adjusted to through-flow labyrinth clearance, using small―gap suture seal system packing；
Low pressure (LP) cylinder enters to strip height using 360 ° of spiral cases and enters vapour efficiency, and optimization low pressure steam discharge guide ring reduces steam discharge loss；
Using one piece elbow form communicating tube structure, pipeline crushing is reduced；
Novel casting low-pressure internal cylinder, tangential spiral case enters vapour, it is streamlined it is accessible enter vapour passage, self-seal type cylinder body construction skill
Art is excellent, it is ensured that good rigidity and sealing.
Brief description of the drawings
Fig. 1 is the overall structure front view of the overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW of the present invention.
Embodiment
Embodiment one：As shown in figure 1, the overcritical clammy condensing-types of the steam discharge of three cylinder two of the 350MW of present embodiment
Steam turbine includes pressing in front bearing box 1, high pressure cylinder 2, the first middle (center) bearing case 3, turbine shafting high pressure rotor 4, turbine shafting
Rotor 5, intermediate pressure cylinder 6, the second middle (center) bearing case 7, low pressure (LP) cylinder 8, turbine shafting low pressure rotor 9 and rear bearing housing 10, front bearing box
1st, the first middle (center) bearing case 3, the second middle (center) bearing case 7 and rear bearing housing 10 are arranged in frame using landing structure, and high pressure cylinder 2 leads to
Cross ram's horn to be supported on the middle (center) bearing case 3 of front bearing box 1 and first, intermediate pressure cylinder 6 is supported on the first middle (center) bearing case 3 by upper ram's horn
On the second middle (center) bearing case 7；Low pressure (LP) cylinder 8 is arranged in frame using landing structure；High pressure cylinder 2, intermediate pressure cylinder 6 and the edge of low pressure (LP) cylinder 8
Tandem is set length direction successively, and high pressure cylinder 2, intermediate pressure cylinder 6 and low pressure (LP) cylinder 8 are inside and outside double shell structure, and turbine shafting is high
Connected in pressure rotor 4, turbine shafting between pressure rotor 5 and turbine shafting low pressure rotor 9 by rigid flange shaft coupling
Connect, turbine shafting high pressure rotor 4 and turbine shafting low pressure rotor 9 are dual-support structure.
High, intermediate pressure cylinder can improve the stress distribution of cylinder using double shell structure, improve unit and load variations are fitted
Ying Xing, low pressure (LP) cylinder can reduce the thermal expansion amount of outer shell using double shell structure, and be conducive to the radial direction diffusion of steam discharge.Steam turbine
Each cylinder is both designed as horizontal flange structure, and high, intermediate pressure cylinder stud gets up half-connection above and below cylinder, and by outer
The ram's horn that cylinder upper half is stretched out is supported on the bearing of bearing housing, and low pressure (LP) cylinder is seated in foundation sole plate using " skirtboard " of outer shell lower half
On.
Present invention reduction mesolow point cylinder pressure, improves low pressure operation environment, improves low pressure (LP) cylinder efficiency；High, intermediate pressure cylinder pressure
Power level and low pressure (LP) cylinder part stator blade use fabricated construction, it is ensured that the accuracy of manufacture；The present invention is adjusted to through-flow labyrinth clearance,
Using small―gap suture seal system packing；Low pressure (LP) cylinder enters to strip height using 360 ° of spiral cases and enters vapour efficiency, optimizes low pressure steam discharge guide ring
Reduce steam discharge loss；Using one piece elbow form communicating tube structure, pipeline crushing is reduced；Novel casting low-pressure internal cylinder, tangential snail
Shell enters vapour, it is streamlined it is accessible enter vapour passage, self-seal type cylinder body constructing technology is excellent, it is ensured that good rigidity and sealing；
Present embodiment is high, intermediate pressure section designs a set of advanced small enthalpy drop reactionary style blade profile, and for subcritical
In the transformation of 300MW units, the through-flow high-pressure section series of unit is set to get a promotion, and by the dividing plate of pressure stage by original weldering
Connect dividing plate and be changed to assembling diaphragm；The through-flow series of intermediate pressure section is set to get a promotion, middle pressure is led to all using assembled stator blade
The through-flow optimization design to high pressure is crossed, has the high intermediate pressure cylinder effect of unit and increases substantially, while by increasing medium pressure grade
Enthalpy drops at different levels are pressed in number, reasonable distribution, the throttle (steam) temperature and pressure of low pressure (LP) cylinder can be further reduced, be that base is established in low pressure (LP) cylinder synergy
Plinth；
In present embodiment press rotor be provided with cooling system, because the unit reheat temperature is to 566 DEG C, thus rotor except
In structure optimization design and on material from outside 30Cr1Mo1V materials, in order to improve rotor operation environment, devise middle pressure
The cooling steam system of rotor, interlayer between IP inner casing and middle pressure rotor is introduced into using steam after governing stage, to reduce rotor table
Face temperature, makes rotor safer reliable.
Present embodiment low pressure (LP) cylinder uses new 360 ° of scroll casing type low-pressure internal cylinders, can well eliminate and respectively connect with portion's socket
The inside leakage losses in conjunction face, improves through-flow operational efficiency；Self-seal type cylinder body constructing technology is used simultaneously, it is ensured that low-pressure internal cylinder
Good rigidity and sealing；Coordinate the design of new 360 ° of scroll casing type low-pressure internal cylinders, the 1st grade of dividing plate of low pressure uses horizontal stator
Structure, can preferably comb low pressure admission flow field, actively play spiral case effect, make to minimize into vapour loss.
Present embodiment is high, mesolow rotor is integral rotor, and mesolow rotor high temperature section, low-temperature zone are using different
Heat treatment, makes front and rear two sections to reach different mechanical performances, has both met the elevated temperature strength requirement of high temperature section, has met again
The performance of the high intensity of low-temperature zone and low brittle transition temperature value.
Embodiment two：As shown in figure 1, present embodiment high pressure cylinder 2, intermediate pressure cylinder 6 are single process cylinder pressure, low pressure
Cylinder 8 is double-flow cylinder pressure.It is so designed that active balance rotor axial thrust makes shafting global design more reasonable.Other compositions
And annexation is identical with embodiment one.
Embodiment three：As shown in figure 1, the main vapour regulation union valve of present embodiment high pressure is arranged symmetrically in high pressure cylinder
2 both sides, the main vapour regulation union valve of high pressure is connected with high pressure cylinder about 2 using airway tube respectively, the main vapour regulation union valve of high pressure
It is rigid support between basis.It is so designed that, the cylinder flow-through format so set can improve the efficiency of each cylinder, can have again
Effect shortens unit axial dimension, control final blade length and reduces rotor axial thrust.Other compositions and annexation and tool
Body embodiment one or two is identical.
Embodiment four：As shown in figure 1, the main vapour regulation union valve of present embodiment reheating is arranged symmetrically in intermediate pressure cylinder
6 both sides, the main vapour regulation union valve of reheating is connected with intermediate pressure cylinder 6 using airway tube, the main vapour regulation union valve of reheating and basis
Between for resilient support.It is so designed that, the cylinder flow-through format so set can improve the efficiency of each cylinder, can effectively shorten machine again
Group axial dimension, control final blade length and reduction rotor axial thrust.Other compositions and annexation and specific embodiment party
Formula three is identical.
Embodiment five：As shown in figure 1, present embodiment high pressure cylinder 2, intermediate pressure cylinder 6 are horizontal flange structure,
The upper lower half of high pressure cylinder 2, the upper lower half of intermediate pressure cylinder 6 are connected by stud.It is so designed that, it is easy to process, convenient installation,
Maintenance.Other compositions and annexation are identical with embodiment one, two or four.
Embodiment six：Determine as shown in figure 1, the lower half of present embodiment high pressure cylinder 2 and intermediate pressure cylinder 6 is provided with
Center sill, center beam and bearing housing axial restraint.It is so designed that, it is easy to ensure cylinder along unit centre line axial expansion.Its
It is constituted and annexation is identical with embodiment five.
Claims (6)
1. a kind of overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW, it is characterised in that：The clammy condensing-type steamer
Machine includes front bearing box (1), high pressure cylinder (2), the first middle (center) bearing case (3), turbine shafting high pressure rotor (4), turbine shafting
Middle pressure rotor (5), intermediate pressure cylinder (6), the second middle (center) bearing case (7), low pressure (LP) cylinder (8), turbine shafting low pressure rotor (9) and rear bearing
Case (10), front bearing box (1), the first middle (center) bearing case (3), the second middle (center) bearing case (7) and rear bearing housing (10) are using landing knot
Structure is arranged in frame, and high pressure cylinder (2) is supported on front bearing box (1) and the first middle (center) bearing case (3) by upper ram's horn, intermediate pressure cylinder
(6) it is supported on by upper ram's horn on the first middle (center) bearing case (3) and the second middle (center) bearing case (7)；Low pressure (LP) cylinder (8) is using landing structure peace
In frame；High pressure cylinder (2), intermediate pressure cylinder (6) and low pressure (LP) cylinder (8) along its length successively tandem set, high pressure cylinder (2), in
Cylinder pressure (6) and low pressure (LP) cylinder (8) are pressure turn in inside and outside double shell structure, turbine shafting high pressure rotor (4), turbine shafting
It is attached between sub (5) and turbine shafting low pressure rotor (9) by rigid flange shaft coupling, turbine shafting high pressure rotor
And turbine shafting low pressure rotor (9) is dual-support structure (4).
2. the overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW according to claim 1, it is characterised in that：It is high
Cylinder pressure (2), intermediate pressure cylinder (6) are single process cylinder pressure, and low pressure (LP) cylinder (8) is double-flow cylinder pressure.
3. the overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW according to claim 1 or 2, it is characterised in that：
High pressure main vapour regulation union valve is arranged symmetrically in the both sides of high pressure cylinder (2), the main vapour regulation union valve of high pressure respectively with high pressure cylinder (2)
Connected up and down using airway tube, be rigid support between the main vapour regulation union valve of high pressure and basis.
4. the overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW according to claim 3, it is characterised in that：Again
The main vapour regulation union valve of heat is arranged symmetrically in the both sides of intermediate pressure cylinder (6), and the main vapour regulation union valve of reheating is used with intermediate pressure cylinder (6) leads
Tracheae is connected, and is resilient support between the main vapour regulation union valve of reheating and basis.
5. the overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW according to claim 1,2 or 4, its feature exists
In：High pressure cylinder (2), intermediate pressure cylinder (6) are horizontal flange structure, upper lower half, the upper lower half of intermediate pressure cylinder (6) of high pressure cylinder (2)
Connected by stud.
6. the overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW according to claim 5, it is characterised in that：It is high
The lower half of cylinder pressure (2) and intermediate pressure cylinder (6) is provided with the beam that centers, and center beam and bearing housing axial restraint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610794919.1A CN106224015B (en) | 2016-08-31 | 2016-08-31 | The overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610794919.1A CN106224015B (en) | 2016-08-31 | 2016-08-31 | The overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW |
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| Publication Number | Publication Date |
|---|---|
| CN106224015A CN106224015A (en) | 2016-12-14 |
| CN106224015B true CN106224015B (en) | 2017-08-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106761974B (en) * | 2016-12-23 | 2019-03-29 | 东方电气集团东方汽轮机有限公司 | A kind of steam turbine low-pressure cylinder structure |
| CN108979761A (en) * | 2018-07-24 | 2018-12-11 | 哈尔滨汽轮机厂有限责任公司 | A kind of large capacity combination circulation steam turbine |
| CN109162765B (en) * | 2018-08-23 | 2023-10-10 | 哈尔滨汽轮机厂有限责任公司 | Ultrahigh-pressure 45MW once intermediate reheating high-rotation-speed steam turbine |
| CN113864006A (en) * | 2020-06-30 | 2021-12-31 | 上海电气电站设备有限公司 | Steam turbine expansion sliding pin system and steam turbine |
| CN113029436B (en) * | 2021-03-01 | 2023-10-20 | 大唐东北电力试验研究院有限公司 | Method for dynamically balancing long shaft of three-cylinder two-exhaust 200MW steam turbine generator assembly |
| CN114542206B (en) * | 2022-03-09 | 2024-02-20 | 中国船舶重工集团公司第七0三研究所 | Bearing box of compact structure unit |
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Effective date of registration: 20221226 Address after: 150000 building 3, high tech production base, Nangang District, Harbin City, Heilongjiang Province Patentee after: HARBIN TURBINE Co.,Ltd. Patentee after: HADIAN POWER EQUIPMENT NATIONAL ENGINEERING RESEARCH CENTER CO.,LTD. Address before: 150046 No. three power road 345, Xiangfang District, Heilongjiang, Harbin Patentee before: HARBIN TURBINE Co.,Ltd. |
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