CN110173311A - Temperature of power plant steam turbine energy conserving system - Google Patents
Temperature of power plant steam turbine energy conserving system Download PDFInfo
- Publication number
- CN110173311A CN110173311A CN201910600653.6A CN201910600653A CN110173311A CN 110173311 A CN110173311 A CN 110173311A CN 201910600653 A CN201910600653 A CN 201910600653A CN 110173311 A CN110173311 A CN 110173311A
- Authority
- CN
- China
- Prior art keywords
- admission opening
- steam
- steam turbine
- pressure cylinder
- temperature
- 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.)
- Granted
Links
- 238000009792 diffusion process Methods 0.000 claims abstract description 23
- 238000003303 reheating Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000035939 shock Effects 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000012913 prioritisation Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000003466 welding Methods 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/04—Antivibration arrangements
- F01D25/06—Antivibration arrangements for preventing blade vibration
-
- 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
-
- 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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
-
- 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
- F01K7/16—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 being only of turbine type
- F01K7/22—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 being only of turbine type the turbines having inter-stage steam heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/10—Stators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Control Of Turbines (AREA)
Abstract
The invention belongs to steam turbine fields, specifically disclose a kind of temperature of power plant steam turbine energy conserving system, including a ultra-high pressure cylinder, a reheating high pressure cylinder, one or two reheating intermediate pressure cylinder and two or three low pressure (LP) cylinders, the reheating high pressure cylinder, reheating intermediate pressure cylinder stator blade intermediate part outer peripheral surface be uniformly provided with four tangential admission holes；The stator blade intermediate part is equipped with the diffusion admittance that cross-sectional area is greater than admission opening.The cross-sectional area of the diffusion admittance is gradually increased by the direction of admission opening to rotor.The hole wall of the admission opening is equipped with accommodating chamber, is rotatably connected to rotation axis in accommodating chamber, and several rotation processes are fixedly connected in rotation axis can the intermittent steam-operating blade for blocking admission opening.The present apparatus can solve the problem of reheated steam can interfere the movement of movable vane, reduce the efficiency of steam turbine.
Description
Technical field
The invention belongs to steam turbine fields, and in particular to a kind of temperature of power plant steam turbine energy conserving system.
Background technique
It is existing to be widely used, it is steam turbine form especially for use in the steam turbine on ship, steam turbine is
It is flushed to by static cascade by nozzle using the steam that burning in boiler comes out and fills vaned runner, impeller rotation drives and promotes
Device propulsion generator or ship, steam turbine power is big but structure is complex, bulky, at present the dynamic efficiency of steam turbine
Ideal level is not all reached.And required in energy conservation and environmental protection under very urgent situation, the industries such as communications and transportation, power generation are more
It needs efficient with inflating medium such as steam, compressed gas, liquefied gas etc. to be that energy source has the dynamic of higher conversion efficiency
Power device.
Authorization Notice No. provides a kind of steam turbine structure for the patent document of CN102383879B, in the program by
Stator blade intermediate part outer peripheral surface in reheating high pressure cylinder is uniformly provided with several tangential admission holes, and reheated steam is in rotor circumferential direction
High speed tangential gas flow is formed, after converting heat into kinetic energy, the temperature of reheated steam itself is reduced, to drop to rotor
Temperature.But reheated steam can expand rapidly after admission opening ejection, in addition reheated steam air velocity is quickly, to make from into vapour
The reheated steam that hole enters quickly diffuses to the position of the Steam Actuation movable vane rotation at static cascade position, i.e., enters from admission opening
The expansion process of reheated steam can occur in the position of steam and movable vane effect, therefore can interfere to the movement of movable vane, drop
The low efficiency of steam turbine.
Summary of the invention
The purpose of the present invention is to provide a kind of temperature of power plant steam turbine energy conserving systems, can be to movable vane to solve reheated steam
The problem of movement interferes, and reduces the efficiency of steam turbine.
In order to achieve the above object, base case of the invention provides a kind of temperature of power plant steam turbine energy conserving system, including one
A ultra-high pressure cylinder, a reheating high pressure cylinder, one or two reheating intermediate pressure cylinder and two or three low pressure (LP) cylinders, the thermal high again
Cylinder, reheating intermediate pressure cylinder stator blade intermediate part outer peripheral surface be uniformly provided with four tangential admission holes；The stator blade intermediate body portion
Part is equipped with the diffusion admittance that cross-sectional area is greater than admission opening.
Prioritization scheme one: the cross-sectional area of the diffusion admittance is gradually increased by the direction of admission opening to rotor.
Prioritization scheme two: the hole wall of the admission opening is equipped with accommodating chamber, is rotatably connected to rotation axis in accommodating chamber, rotates
Several rotation processes are fixedly connected on axis can the intermittent steam-operating blade for blocking admission opening.
Prioritization scheme three: the steam-operating blade is fan-shaped.
Prioritization scheme four: being communicated with shock relieve vent between the admission opening and diffusion admittance, the cross-sectional area of shock relieve vent is less than
The cross-sectional area of admission opening.
Working principle: after reheated steam enters from admission opening, when steam-operating blade does not block admission opening, steam is from into vapour
Hole is directly entered diffusion admittance.Steam enters direct expansion after diffusion admittance, while keeping certain speed, from stator blade intermediate
The tangential direction of component periphery enters between rotor and stator blade intermediate part, at this point, the vapor (steam) temperature after expanded reduces, together
When thermal energy be converted to kinetic energy, temperature further decreases, to cool down to rotor.On the other hand, steam comes out from admission opening
It is first expanded, is being entered between rotor and stator blade intermediate part later, to avoid the steam entered from admission opening to quiet
Leaf grating impacts the reaction force of movable vane and impulsion power by steam.
The beneficial effect of this base case is: leading in admission opening close to the diffusion that rotor one end is arranged in 1. this programme
Road provides the diffusion zone of reheated steam, i.e., actively makes to enter back into stator blade intermediate part after reheated steam premature inflation
Gap between rotor reduces the reheated steam expansion that enters by air inlet to the impulsion power of impulse type stage and reaction-type stage
Reaction force acts on the influence of movable vane, improves the efficiency of steam turbine.Meanwhile this programme drops rotor using reheated steam
Temperature has saved the energy.
2. steam-operating blade intermittence blocks admission opening, intermittence forms back pressure, to make reheated steam in diffusion admittance
Speed of expansion faster, further reduce by air inlet enter reheated steam expand to the impulsion power of impulse type stage and reaction
The reaction force of grade acts on the influence of movable vane, improves the efficiency of steam turbine.
The vibration of stator blade when 3. the setting of shock relieve vent reduces to form back pressure.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of temperature of power plant steam turbine of embodiment of the present invention energy conserving system；
Fig. 2 is the enlarged drawing in Fig. 2 at A.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Appended drawing reference in Figure of description includes: stator blade intermediate part 1, admission opening 2, diffusion admittance 3, accommodating chamber 4, rotation
Axis 5, steam-operating blade 6, shock relieve vent 7.
Embodiment: the temperature of power plant steam turbine energy conserving system in this programme, including single stream a ultra-high pressure cylinder, a Dan Liuzai
Thermal high cylinder, a double-current reheating intermediate pressure cylinder, two standard leaving areas low pressure (LP) cylinder.Ultra-high pressure cylinder, reheating high pressure cylinder, reheating
Intermediate pressure cylinder, low pressure (LP) cylinder are all made of full admission structure, using the not only not loss of partial admission of full admission structure, stage efficiency
Height, and will be greatly reduced the stress of the first grade blade of high temperature, vapor pressure is eliminated to the vapour of turbine rotor shafting
Gap exciting guarantees the safe and reliable operation of steamer function.
To reduce manufacturing cost, the application of high temperature alloy steel is reduced, rotor forging size, hot vapour again of the invention are reduced
Welding structure can be used in the rotor of high-temperature rotor in turbine, especially reheating intermediate pressure cylinder, which is divided into vapour section and row
Vapour section two parts are forged into vapour section using the material of 9%Cr, and steam discharge section is forged using 10%Cr 12%Cr material, into vapour
Section welds together with steam discharge section.The material for pressing the rotor of reheating cylinder that can also directly adopt single 9%Cr among the above is made.
As depicted in figs. 1 and 2,1 outer peripheral surface of stator blade intermediate part of reheating high pressure cylinder be uniformly provided with four tangentially into
Steam vent 2.Using vortex principle, reheated steam enters the hole and forms high speed tangential flow.Stator blade intermediate part 1 is equipped with transversal
Area is greater than the diffusion admittance 3 of admission opening 2.The cross-sectional area of diffusion admittance 3 is gradually increased by the direction of admission opening 2 to rotor,
And appoints and so keep steam that can enter stator blade intermediate body portion from the tangential direction of 1 periphery of stator blade intermediate part after admission opening entrance
Gap between part 1 and rotor.
The hole wall of admission opening 2 is equipped with accommodating chamber 4, and rotation axis 5, rotation axis 5 and receiving wall are rotatably connected in accommodating chamber 4
High temperature resistant bearing is installed at the rotation connection of wall.The circumferential three pieces rotation process that is uniformly fixedly connected with can interval in rotation axis 5
Property block admission opening 2 steam-operating blade 6, steam-operating blade 6 is fan-shaped, admission opening 2 be circular hole.6 thickness of steam-operating blade is greater than into vapour
2 diameter of hole, to form good closure to admission opening 2.Accommodating chamber 4 is in disk form, and admission opening 2 is connected to 4 middle part of accommodating chamber,
I.e. 4 lower part of accommodating chamber be more than admission opening 2 lower wall, so that steam-operating blade 6 forms good closure to admission opening 2.Accommodating chamber 4 weeks
Wall and the steam-operating blade 6 of rotation form the clearance fit that gap is 0.5mm, to realize to steam-operating blade 6 to the envelope of admission opening 2
Stifled, which is different from sealing, and a small amount of steam is allowed to pass through.
Working principle: when reheated steam from admission opening 2 enter after, when steam-operating blade 6 does not block admission opening 2, steam from
Admission opening 2 is directly entered diffusion admittance 3.Steam enters direct expansion after diffusion admittance 3, while keeping certain speed, from quiet
The tangential direction of 1 periphery of leaf intermediate part enters between rotor and stator blade intermediate part 1, at this point, the steam after expanded
Temperature reduces, while thermal energy is converted to kinetic energy, and temperature further decreases, to cool down to rotor.On the other hand, steam from
Admission opening 2 is first expanded after coming out, and is being entered between rotor and stator blade intermediate part 1, thus avoid from admission opening 2 into
The steam entered impacts static cascade by steam to the reaction force of movable vane and impulsion power.
After reheated steam enters from admission opening 2, when steam-operating blade 6 does not block admission opening 2, since steam-operating blade 6 will
Admission opening 2 blocks, and greatly reduces the flow that steam enters diffusion admittance 3, forms back to the steam for being introduced into diffusion admittance 3
Pressure, makes the steam for being introduced into diffusion admittance 3 by the suction to 2 direction of admission opening, to promote the steaming for being introduced into diffusion admittance 3
Vapour further expands, and then further reduced the temperature of steam.Steam is further improved simultaneously to enter in rotor and stator blade
Between between body component 1 when dilation, thus further avoid the steam entered from admission opening 2 to static cascade by steam to dynamic
The reaction force and impulsion power of leaf impact.
Embodiment 2: on the basis of embodiment 1, admission opening 2 is communicated with shock relieve vent 7, shock relieve vent 7 far from admission opening 2 one
It holds and is connected between diffusion admittance 3, the cross-sectional area of shock relieve vent 7 is less than the cross-sectional area of admission opening 2.The shock relieve vent 7 is in steam-operating
When blade 6 blocks admission opening 2, when reduced the closure of admission opening 2 to a certain extent due to steam-operating blade 6, admission opening 2 and expansion
Dissipate 3 pressure difference of channel difference it is too big caused by shake.
Embodiment 3: on the basis of embodiment 1, ultra-high pressure cylinder is double shell cylinder, and outer shell is by former and later two cylinder type cylinder bodies
It is formed by connecting by axial bolts, the axial flange of the junction of two cylinder cylinder bodies is located at the lower region of operating pressure.By
It is much smaller than the area of horizontal flange in the axial action area of cylinder, therefore common compared at present using the cylinder of this structure
The structure of two halves up and down with split cylinder body for its bearing capacity it is stronger, and using this tubular structure cylinder
There is no the limitation that ordinary casing split connecting flange improves cylinder pressure, axial flange setting is opposite in pressure
Lower region can also make axial flange working stress decline to a great extent in this way, and then improve the bearing capacity of ultra-high pressure cylinder.Superelevation
The inner casing of cylinder pressure is also cylinder type, and along the plane dimidiation for passing through axis, former and later two semicircular cylinder cylinder bodies pass through bolt
Be formed by connecting, bolt directly through cylinder barrel rather than the flange outside cylinder, because its diameter is small and without flange overhanging end,
The stress sharp fall of cylinder and bolt can equally be made.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. temperature of power plant steam turbine energy conserving system, it is characterised in that: including a ultra-high pressure cylinder, a reheating high pressure cylinder, one or
Two reheating intermediate pressure cylinders and two or three low pressure (LP) cylinders, the reheating high pressure cylinder, reheating intermediate pressure cylinder stator blade intermediate part outside
Circumferential surface is uniformly provided with four tangential admission holes；It is characterized by: the stator blade intermediate part is greater than equipped with cross-sectional area
The diffusion admittance of admission opening.
2. temperature of power plant steam turbine energy conserving system according to claim 1, it is characterised in that: the cross section of the diffusion admittance
Product is gradually increased by the direction of admission opening to rotor.
3. temperature of power plant steam turbine energy conserving system according to claim 2, it is characterised in that: set on the hole wall of the admission opening
There is accommodating chamber, rotation axis is rotatably connected in accommodating chamber, several rotation processes are fixedly connected in rotation axis intermittent to be blocked
The steam-operating blade of admission opening.
4. temperature of power plant steam turbine energy conserving system according to claim 3, it is characterised in that: the steam-operating blade is fan-shaped.
5. temperature of power plant steam turbine energy conserving system according to claim 4, it is characterised in that: the admission opening and diffusion admittance
Between be communicated with shock relieve vent, the cross-sectional area of shock relieve vent is less than the cross-sectional area of admission opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910600653.6A CN110173311B (en) | 2019-07-04 | 2019-07-04 | Energy-saving system of steam turbine of power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910600653.6A CN110173311B (en) | 2019-07-04 | 2019-07-04 | Energy-saving system of steam turbine of power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110173311A true CN110173311A (en) | 2019-08-27 |
| CN110173311B CN110173311B (en) | 2024-01-26 |
Family
ID=67699909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910600653.6A Active CN110173311B (en) | 2019-07-04 | 2019-07-04 | Energy-saving system of steam turbine of power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110173311B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905605A (en) * | 2019-12-17 | 2020-03-24 | 河北国源电气股份有限公司 | Steam turbine steam guiding control device |
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| US3249333A (en) * | 1963-01-16 | 1966-05-03 | Gen Electric | Nozzle area trim means |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905605A (en) * | 2019-12-17 | 2020-03-24 | 河北国源电气股份有限公司 | Steam turbine steam guiding control device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110173311B (en) | 2024-01-26 |
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