CN106761973A - Individual layer welding cylinder structure is pressed in a kind of steam turbine - Google Patents
Individual layer welding cylinder structure is pressed in a kind of steam turbine Download PDFInfo
- Publication number
- CN106761973A CN106761973A CN201611195921.3A CN201611195921A CN106761973A CN 106761973 A CN106761973 A CN 106761973A CN 201611195921 A CN201611195921 A CN 201611195921A CN 106761973 A CN106761973 A CN 106761973A
- Authority
- CN
- China
- Prior art keywords
- pressed
- individual layer
- steam turbine
- cylinder structure
- medium pressure
- 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
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
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
-
- 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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
Abstract
Cylinder structure is welded the invention discloses individual layer is pressed in a kind of steam turbine, it is characterised in that：Including middle pressure single-shell casing and dividing plate；Medium pressure single-shell casing is welded by entering vapour high-temperature area cast steel material with low-temperature region cast steel material, and the dividing plate is directly installed in single-shell casing.By using individual layer cylinder structure, can effectively solve to exist at steam inlet pipe sealing ring and diaphragm housing ring positioning omoplate axle envelope and draw gas the hidden danger of leakage, improve unit efficiency.
Description
Technical field
Individual layer welding cylinder structure is pressed the present invention relates to steam turbine intermediate cylinder, in specifically a kind of steam turbine.
Background technology
At present, most high-power overcritical, the supercritical turbine unit that in the market puts into operation are used once again
Hot mode, the i.e. main steam from boiler out continue by entering reheater, reheated steam after high pressure cylinder acting into intermediate pressure cylinder
Acting, and whole steam-turbine unit is divided into high pressure cylinder, intermediate pressure cylinder and the part of low pressure (LP) cylinder three.
As shown in Figures 1 to 6, for high pressure point cylinder unit, traditional middle die block is by middle pressure outer shell 1 and IP inner casing
2（Or IP inner casing 2+ diaphragm housing rings 3）Two-layer cylinder structure is constituted；Middle the 3rd section of pressure is drawn gas and pressed from both sides by between IP inner casing 2 and outer shell 1
The 3rd section of the middle pressure that layer is constituted is drawn gas chamber 8 and is extracted, and middle the 4th section of pressure is drawn gas by diaphragm housing ring 3 and middle pressed between outer shell 1
The 4th section of the middle pressure of positioning omoplate isolation is drawn gas chamber 9 and is extracted out.Because reheat steam temperature is up to 600 DEG C~620 DEG C, middle pressure
Generally using the W-V-Nb-N cast steel materials that high-temperature behavior is excellent, this material price is expensive even to be entered the material of inner casing 2 from foreign countries
Mouthful；After 3 grades are done work, to 520 DEG C or so, middle pressure outer shell 1 and the material of diaphragm housing ring 3 are generally made steam from highest for temperature drop
Cr-Mo-V cast steel materials with temperature at 550 DEG C~570 DEG C.
Because middle pressure inlet sleeve 4 one end is on IP inner casing 2, the other end stretches into middle pressure outer shell 1 and adopts each other
With the sealing structure of sealing ring 5, reheated steam is along reheated steam flow direction V by outer shell in the clearance leakage of sealing ring 5 to middle pressure
1st, between 2 in interlayer, steam flow direction V is revealedL；Middle the 4th section of pressure draws gas chamber 9 by between diaphragm housing ring 3 and middle pressure outer shell 1
Two at position omoplate be sealed to form；There is 100 DEG C or so of temperature difference due to positioning omoplate both sides, easily made during unit operation
Into the deformation of positioning omoplate, cause that the 3rd section of steam that draws gas is leaked to the 4th section of place of drawing gas and the 4th section of steam that draws gas is to middle row
Leakage, influences the economy of unit.
The content of the invention
The invention aims to solve above-mentioned technical problem, there is provided press individual layer welding cylinder knot in a kind of steam turbine
Structure, by using individual layer cylinder structure, can effectively solve to there is axle envelope and draw gas at steam inlet pipe sealing ring and diaphragm housing ring positioning omoplate
The hidden danger of leakage, improves unit efficiency.
Realize the technical scheme is that：Individual layer welding cylinder structure is pressed in a kind of steam turbine, it is characterised in that：Including
Middle pressure single-shell casing and dividing plate；Medium pressure single-shell casing welded by entering vapour high-temperature area cast steel material and low-temperature region cast steel material and
Into the dividing plate is directly installed in single-shell casing.
The high-temperature area cast steel material of medium pressure single-shell casing is with low-temperature region cast steel material welding position in middle pressure the 3rd
At level dividing plate omoplate.
Medium pressure single-shell casing is upper and lower half structure, and medium pressure single-shell casing upper and lower half respectively sets an air intake, institute
High-temperature area cast steel material is stated for W-V-Nb-N cast steels, low-temperature region cast steel material is Cr-Mo-V cast steels.
Middle pressure valve is installed, medium pressure valve is located at cylinder both sides and valve export is direct outside medium pressure single-shell casing
It is bolted on cylinder.
SW with outside ring is set between medium pressure valve and middle pressure single-shell casing.
The 3rd section of medium pressure, the 4th section of chamber that draws gas are using variable section structure pattern.
The invention has the advantages that：
1st, the present invention uses individual layer cylinder structure, can effectively solve there is steam at steam inlet pipe sealing ring and diaphragm housing ring positioning omoplate
The hidden danger of leakage, improves unit efficiency；
2nd, it is welded by using high-temperature area W-V-Nb-N cast steel materials and Cr-Mo-V cast steel materials, meets respective material
Use requirement, solves the problems, such as that monoblock cast is costly at different temperatures；
3rd, for variable section structure, reduction draws gas chamber to steam flow influence for the 3rd section of intermediate pressure cylinder, the 4th section of chamber design of drawing gas；
4th, valve is directly on cylinder；Horizontal tangential enters vapour, reduces trunking loss, improves into steam flow steam flow uniformity.
Brief description of the drawings
Fig. 1 for prior art single current in press through-flow schematic diagram；
Fig. 2 is the I enlarged drawings of Fig. 1；
Fig. 3 is the II enlarged drawings of Fig. 1；
Fig. 4 for prior art double fluid in press schematic diagram；
Fig. 5 be prior art in be pressed into steam packing seal ring structure schematic diagram；
Fig. 6 is the III enlarged drawings of Fig. 5；
Through-flow schematic diagram is pressed in the single current of Fig. 7 embodiment of the present invention；
Through-flow schematic diagram is pressed in the double split flow of Fig. 8 embodiment of the present invention；
Fig. 9 valve arrangement structural representations of the present invention；
Label in figure：1-middle pressure outer shell, 2-IP inner casing, 3-middle pressure diaphragm housing ring, 4-middle pressure inlet sleeve, 5-sealing ring,
6-intermediate pressure cylinder high-temperature area, 7-intermediate pressure cylinder low-temperature region, the 3rd section of chamber that draws gas of 8-middle pressure, the 4th section of chamber of drawing gas of 9-middle pressure
Room, 10-Middle pressure valve, 11-horizontal flange connecting bolt, 12-horizontal flange is inverted connecting bolt, P-weld seam position
Put, V-reheated steam flow direction, VL- leakage steam flow direction.
Specific embodiment
Embodiment 1
Single current intermediate pressure cylinder structure as shown in Fig. 7, Fig. 9, this individual layer welds intermediate pressure cylinder structural shape by intermediate pressure cylinder high-temperature area 6
W-V-Nb-N cast steel materials are respectively welded with the Cr-Mo-V cast steel materials of intermediate pressure cylinder low-temperature region 7 and form, the W-V-Nb-N castings
Steel material can bear 600 DEG C~620 DEG C high-temperature steams；The Cr-Mo-V cast steel materials can bear less than 570 DEG C high temperature and steam
Vapour, position while welding P is selected at middle pressure third level dividing plate.
Medium pressure cylinder steam inlet condition is 5~8MPa, and reheat temperature is 600 DEG C~620 DEG C, and middle pressure stripping temperature is 290
DEG C~320 DEG C, middle pressure steam pressure is 0.5~0.8MPa；Middle pressure valve 10 is arranged on the operation platform of cylinder both sides, and valve goes out
Mouth is directly bolted with intermediate pressure cylinder, using horizontal tangential steam admission mode.
The 3rd section of medium pressure cylinder, the 4th section of chamber 8,9 that draws gas use variable section structure pattern, at the extraction steam pipe mouth of pipe
For area of section is maximum and be 1.5~2 times of extraction steam pipe mouth of pipe areas of section；The area of section farthest apart from the extraction steam pipe mouth of pipe is minimum
And be 0.4~0.6 times of extraction steam pipe mouth of pipe area of section；Maximum cross-section gradually smoothly transits with smallest cross-sectional；Vapour is pressed into
Place's axle envelope sets 3 sections of axle envelopes and draws gas, and 2 sections of axle envelopes is set at middle pressure vapour and is drawn gas.
Medium pressure cylinder is divided into upper and lower half structure, and the connected mode of horizontal flange connecting bolt 11 is used at split, leans on
Certain side bolt at vapour is pressed near the mode of connecting bolt 12 is inverted using horizontal flange；Whole intermediate pressure cylinder is by lower half cylinder
4 ram's horns are ridden on bearing housing.SW with outside ring is set between medium pressure valve 10 and middle pressure single-shell casing, it is ensured that remaining valve
Completely attached between door, intermediate pressure cylinder and play sealing function, prevent reheated steam from revealing.
Medium pressure enters at vapour insulation layer thickness in 320mm~350mm, at middle pressure vapour insulation layer thickness be 230mm~
250mm, insulation layer thickness successively decreases step by step.
Embodiment 2
Double split flow intermediate pressure cylinder structure as shown in Figure 8, Figure 9, this individual layer welding intermediate pressure cylinder structural shape enters vapour intermediate pressure cylinder by centre
The W-V-Nb-N cast steel materials of high-temperature area 6 and the Cr-Mo-V cast steel materials of both sides intermediate pressure cylinders low-temperature region 7 be respectively welded and
Into the W-V-Nb-N cast steel materials can bear 600 DEG C~620 DEG C high-temperature steams；The Cr-Mo-V cast steel materials can bear
Less than 570 DEG C high-temperature steams, position while welding P is selected at middle pressure third level dividing plate.
Medium pressure cylinder steam inlet condition is 5~8MPa, and reheat temperature is 600 DEG C~620 DEG C, and middle pressure stripping temperature is 290
DEG C~320 DEG C, middle pressure steam pressure is 0.5~0.8MPa；Middle pressure valve 10 is arranged on the operation platform of cylinder both sides, and valve goes out
Mouth is directly bolted with intermediate pressure cylinder, using horizontal tangential steam admission mode.
The 3rd section of medium pressure cylinder, the 4th section of chamber 8,9 that draws gas use variable section structure pattern, at the extraction steam pipe mouth of pipe
For area of section is maximum and be 1.5~2 times of extraction steam pipe mouth of pipe areas of section；The area of section farthest apart from the extraction steam pipe mouth of pipe is minimum
And be 0.4~0.6 times of extraction steam pipe mouth of pipe area of section；Maximum cross-section gradually smoothly transits with smallest cross-sectional；Pressure vapour in both sides
Place sets 2 sections of axle envelopes and draws gas.
Medium pressure cylinder is divided into upper and lower half structure, and the connected mode of horizontal flange connecting bolt 11 is used at split, leans on
Certain side bolt at vapour is pressed near the connected mode of connecting bolt 12 is inverted using horizontal flange；Whole intermediate pressure cylinder passes through lower half
4 ram's horns are ridden on bearing housing on cylinder.SW with outside ring is set between medium pressure valve 10 and middle pressure single-shell casing, it is ensured that its
Completely attached between remaining valve, intermediate pressure cylinder and play sealing function, prevent reheated steam from revealing.
Medium pressure enters at vapour insulation layer thickness in 320mm~350mm, at middle pressure vapour insulation layer thickness be 230mm~
250mm, successively decreases step by step from high-temperature area to low-temperature region insulation layer thickness.
Use above specific case is illustrated to the present invention, is only intended to help and understands the present invention, is not used to limit
The system present invention.For those skilled in the art, according to thought of the invention, can also make some simple
Deduce, deform or replace.
Claims (8)
1. individual layer welding cylinder structure is pressed in a kind of steam turbine, it is characterised in that：Including middle pressure single-shell casing and dividing plate；Medium pressure
Single-shell casing is welded by entering vapour high-temperature area cast steel material with low-temperature region cast steel material, and the dividing plate is directly installed in single-shell casing
In.
2. individual layer welding cylinder structure is pressed in steam turbine according to claim 1, it is characterised in that：Medium pressure single-shell casing
High-temperature area cast steel material is with low-temperature region cast steel material welding position at middle pressure third level dividing plate omoplate.
3. individual layer welding cylinder structure is pressed in steam turbine according to claim 1, it is characterised in that：Medium pressure single-shell casing is
Upper and lower half structure, medium pressure single-shell casing upper and lower half respectively sets an air intake, horizontal tangential steam admission mode.
4. individual layer welding cylinder structure is pressed in steam turbine according to claim 1, it is characterised in that：The high-temperature area cast steel
Material is W-V-Nb-N cast steels, and low-temperature region cast steel material is Cr-Mo-V cast steels.
5. individual layer welding cylinder structure is pressed in steam turbine according to claim 1, it is characterised in that：Outside medium pressure single-shell casing
Middle pressure valve is installed, medium pressure valve is located at cylinder both sides and valve export is directly bolted on cylinder.
6. individual layer welding cylinder structure is pressed in steam turbine according to claim 5, it is characterised in that：Medium pressure valve is with
SW with outside ring is set between pressure single-shell casing.
7. individual layer welding cylinder structure is pressed in steam turbine according to claim 1, it is characterised in that：The 3rd section of medium pressure,
The 4th section of chamber that draws gas is using variable section structure pattern.
8. individual layer welding cylinder structure is pressed in steam turbine according to claim 1, it is characterised in that：Medium pressure steam admission side end
Packing sets three sections of axle envelopes and draws gas, and end packing sets two sections of axle envelopes and draws gas at steam discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611195921.3A CN106761973B (en) | 2016-12-22 | 2016-12-22 | Pressure single layer welds cylinder structure in a kind of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611195921.3A CN106761973B (en) | 2016-12-22 | 2016-12-22 | Pressure single layer welds cylinder structure in a kind of steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106761973A true CN106761973A (en) | 2017-05-31 |
| CN106761973B CN106761973B (en) | 2019-06-18 |
Family
ID=58899237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611195921.3A Active CN106761973B (en) | 2016-12-22 | 2016-12-22 | Pressure single layer welds cylinder structure in a kind of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106761973B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58211507A (en) * | 1982-06-02 | 1983-12-09 | Hitachi Ltd | Turbine casing |
| JPH05149106A (en) * | 1991-11-27 | 1993-06-15 | Mitsubishi Heavy Ind Ltd | Steam turbine chamber |
| JP2000282805A (en) * | 1999-03-29 | 2000-10-10 | Toshiba Corp | Steam turbine equipment |
| US20030143069A1 (en) * | 2000-02-10 | 2003-07-31 | Morikazu Kitazawa | Steam turbine and power generating equipment |
| CN201671660U (en) * | 2010-05-06 | 2010-12-15 | 中国长江动力公司(集团) | Steam turbine with steam extraction being changed into back pressure type |
| CN104963728A (en) * | 2015-06-25 | 2015-10-07 | 北京全三维能源科技股份有限公司 | Ultrahigh pressure impulse steam turbine |
-
2016
- 2016-12-22 CN CN201611195921.3A patent/CN106761973B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58211507A (en) * | 1982-06-02 | 1983-12-09 | Hitachi Ltd | Turbine casing |
| JPH05149106A (en) * | 1991-11-27 | 1993-06-15 | Mitsubishi Heavy Ind Ltd | Steam turbine chamber |
| JP2000282805A (en) * | 1999-03-29 | 2000-10-10 | Toshiba Corp | Steam turbine equipment |
| US20030143069A1 (en) * | 2000-02-10 | 2003-07-31 | Morikazu Kitazawa | Steam turbine and power generating equipment |
| CN201671660U (en) * | 2010-05-06 | 2010-12-15 | 中国长江动力公司(集团) | Steam turbine with steam extraction being changed into back pressure type |
| CN104963728A (en) * | 2015-06-25 | 2015-10-07 | 北京全三维能源科技股份有限公司 | Ultrahigh pressure impulse steam turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106761973B (en) | 2019-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102383879B (en) | Steam turbine structure | |
| CA1220038A (en) | Main steam inlet structure for steam turbine | |
| CN106224015B (en) | The overcritical clammy condensing turbines of the steam discharge of three cylinder two of 350MW | |
| CN206458517U (en) | A kind of nuclear power plant's turbine low pressure cylinder | |
| CN103925011A (en) | 9F-level double-pumping axial steam exhausting turbine | |
| CN105201568A (en) | Low-pressure steam turboset with 360-degree volute casing admission low-pressure inner cylinder | |
| CN101196126A (en) | High-power twin-cylinder double flow turbine | |
| CN206845239U (en) | A kind of nuclear power plant 1250MW steam turbine high-pressure cylinders | |
| CN102392703B (en) | Double reheat steam turbine | |
| CN102996852A (en) | Hydraulic self-operated three-way valve | |
| CN105863750B (en) | A kind of steam turbine Integral double-deck low-pressure internal cylinder | |
| CN102392699B (en) | Steam turbine operation method | |
| CN104533550A (en) | Secondary reheating steam turbine ultrahigh-pressure cylinder capable of providing all regenerative feedwater heating steam extraction | |
| CN103046974A (en) | High-pressure cylinder of ultra-supercritical steam turbine set | |
| CN206376900U (en) | The gland seal device of high-temperature steam screw machine | |
| CN210799056U (en) | Ultra-high temperature and ultra-high pressure back pressure steam turbine | |
| CN106761973A (en) | Individual layer welding cylinder structure is pressed in a kind of steam turbine | |
| CN103953401B (en) | High-and-medium pressure cylinder of steam turbine for thermal power plant | |
| CN204881228U (en) | Condenser | |
| CN206860242U (en) | Heat-insulated closure assembly and the super-pressure reheating turbine for including it | |
| CN212716792U (en) | High-pressure steam turbine providing steam extraction heat regeneration | |
| CN104819018B (en) | Single reheat turbine high pressure cylinder capable of providing all extraction steam for regenerative feedwater heating | |
| CN209413948U (en) | Cooling high-temperature rotor inside 640 DEG C ~ 650 DEG C steam turbines | |
| CN202900332U (en) | Turbine air cylinder casting assembly | |
| CN206737959U (en) | Vapour water conservancy diversion loop device and steam turbine are pressed into steam turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |