CN101772622A - Rotor for low pressure turbine - Google Patents
Rotor for low pressure turbine Download PDFInfo
- Publication number
- CN101772622A CN101772622A CN200980100092A CN200980100092A CN101772622A CN 101772622 A CN101772622 A CN 101772622A CN 200980100092 A CN200980100092 A CN 200980100092A CN 200980100092 A CN200980100092 A CN 200980100092A CN 101772622 A CN101772622 A CN 101772622A
- Authority
- CN
- China
- Prior art keywords
- steel
- pressure turbine
- steam
- low
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- 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
-
- 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
- F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
-
- 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
- F01D3/00—Machines or engines with axial-thrust balancing effected by working-fluid
- F01D3/02—Machines or engines with axial-thrust balancing effected by working-fluid characterised by having one fluid flow in one axial direction and another fluid flow in the opposite direction
-
- 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
- F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
- F01D5/063—Welded rotors
-
- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/10—Metals, alloys or intermetallic compounds
- F05D2300/13—Refractory metals, i.e. Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
- F05D2300/132—Chromium
-
- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/10—Metals, alloys or intermetallic compounds
- F05D2300/17—Alloys
- F05D2300/177—Ni - Si alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
Provided is a rotor for a low-pressure turbine wherein the mechanical strength characteristics can be maintained even if the temperature of steam introduced into the low-pressure turbine becomes high, and no quality problem is posed without an increase in the manufacturing costs or days. The rotor for a low-pressure turbine which is used in a steam turbine facility equipped with a high-pressure turbine, an intermediate-pressure turbine and a low-pressure turbine is constituted such that a member formed of 1CrMoV steel, 2.25CrMoV steel or 10CrMoV steel and arranged on the steam inlet side and a member formed of 3.5Ni steel and arranged on the steam outlet side are joined by welding. Alternatively, a member formed of 3.5Ni steel and arranged on the steam inlet side and a member formed of 3.5Ni steel and arranged on the steam outlet side are joined by welding, wherein the member arranged on the steam inlet side is formed of low-impurity 3.5Ni steel containing Si:0.1% or less by wt%, Mn: 0.1% or less by wt%, and inevitable impurities of P:0.02% or less, S: 0.02% or less, Sn: 0.02% or less, As: 0.02% or less, Sb:0.02% or less, Al:0.02% or less, and Cu:0.1% or less by wt%.
Description
Technical field
The present invention relates to employed rotor for low pressure turbine in a kind of steam turbine installation that possesses high-pressure turbine, middle pressure turbine and low-pressure turbine, particularly relate to employed suitable rotor for low pressure turbine in the steam turbine installation that the steam inlet temperature is the high temperature more than 380 ℃.
Background technique
Now,, use nuclear energy, firepower, three kinds of methods of waterpower,, can envision from now on and also can use as main electricity-generating method with above-mentioned three kinds of electricity-generating methods from the viewpoint of stock number and energy density as main electricity-generating method.Wherein, thermal power generation as safety and the reply load change the higher electricity-generating method of ability and value is higher, can envision it and also can continue from now on to play an important role at power field.
Burn in the steam turbine installation that uses in the thermal power generation at the coal that comprises the steam turbine machine, generally possess high-pressure turbine, middle pressure turbine, reach low-pressure turbine, use the steam of 600 ℃ of levels.In such steam turbine installation, the steam of 600 ℃ of levels supplying with from boiler is directed to high-pressure turbine and makes the high-pressure turbine rotation and after the acting of expanding in the high pressure leaf-level that is made of moving vane and stator blade, press turbine being directed to from the high-pressure turbine discharge, with high-pressure turbine the middle turbine of pressing is rotated and the acting of expanding, and then be directed to low-pressure turbine and the acting of expanding, to the condenser exhaust and condensation.
The rotor for low pressure turbine of such steam turbine installation is generally formed by 3.5Ni steel (for example 3.5NiCrMoV steel etc.), and low-pressure turbine inlet steam temperature is set at the 3.5Ni steel can keep the temperature of mechanical strength property and toughness promptly below 380 ℃.
In above-mentioned steam turbine installation, in recent years, in order to reduce CO
2Discharge capacity and and then improve the thermal efficiency, require to adopt the technology of the steam condition more than 630 ℃.
To the steam of high-pressure turbine importing more than 630 ℃, and with the situation of the steam that in the past used 600 ℃ of levels use in the same manner high-pressure turbine and in when pressing turbine, low-pressure turbine inlet steam temperature is about 400～430 ℃, than rose in the past, exist because the rising of this temperature causes the rotor of low-pressure turbine and can not keep the possibility of mechanical strength property and toughness.
Particularly under the situation of double reheating, because partial hot repressing step-down so low-pressure turbine inlet steam temperature rises than one-level is hot again, becomes more strict as design condition.
In order to use the steam more than 630 ℃ and to keep the mechanical strength property and the toughness of the rotor of the low-pressure turbine that forms by the 3.5Ni steel, consider to make high-pressure turbine and middle expansion acting amount of pressing turbine than increase in the past, the vapor (steam) temperature of low-pressure turbine inlet is reduced to below 380 ℃.But, need to increase the blade progression of high-pressure turbine and middle pressure turbine for this reason, there is the whole problem that increases of turbine.
Therefore in patent documentation 1, following rotor for low pressure turbine is disclosed: by the impurity content that contains in the 3.5Ni steel that constitutes rotor for low pressure turbine being reduced and being restricted to trace, thereby suppress to bring out the variation on the metal structure of timeliness embrittlement such as cyrystal boundary segregation of the impurity element that heating causes, even but import also steady running of steam more than 380 ℃.
In patent documentation 1 disclosed technology, require than stricter in the past impurity management.But, particularly because the rotor that low-pressure turbine is used is large-scale, so in patent documentation 1 disclosed technology, there are the following problems: under the situation of making one-piece type rotor for low pressure turbine, cost increases, the manufacturing number of days increases, and postpone delivery date, and for example worry because of deviation cause steam turbine machine that impurity content surpasses the more high manufacturing of the possibility of reference value with rotor in the reliability aspect the quality.
[patent documentation]
Patent documentation 1: TOHKEMY 2006-170006 communique
Summary of the invention
Therefore, the present invention is in view of prior art problems, its purpose is to provide a kind of rotor for low pressure turbine, even it is under the situation of high temperature in the vapor (steam) temperature that imports to low-pressure turbine, also can keep mechanical strength property, and it is do not increase manufacture cost and manufacturing schedule, and also no problem aspect quality.
In order to solve above-mentioned problem, among the present invention, provide a kind of in the steam turbine installation that possesses high-pressure turbine, middle pressure turbine and low-pressure turbine employed rotor for low pressure turbine, it is characterized in that described rotor for low pressure turbine constitutes by welding joint such as lower member: be disposed at the parts that form by 1CrMoV steel (hereinafter referred to as the 1Cr steel), 2.25CrMoV steel (hereinafter referred to as the 2.25Cr steel) or 10CrMoV steel (hereinafter referred to as the 10Cr steel) of steam inlet side and be disposed at the parts that form by the 3.5Ni steel of steam (vapor) outlet side.
Because 1Cr steel, 2.25Cr steel, 10Cr steel were high-pressure turbine rotor, the middle pressure turbine employed material of rotor, so the management method of material is definite, also obtains easily in addition in the past.And then, better than the heat-resisting quantity of 3.5Ni steel.
In addition, the 3.5Ni steel is lower than stress corrosion cracking (SCC) receptance of 1Cr steel, 2.25Cr steel.In addition, 10Cr steel price is than 3.5Ni steel height.
Therefore, the parts that formed by 1Cr steel, 2.25Cr steel or 10Cr steel constitute the steam inlet side that imports high-temperature steam, the parts that are made of the 3.5Ni steel constitute stream (length of blade) and widen and require more high-intensity steam (vapor) outlet side, thereby form for high temperature and the good rotor for low pressure turbine of stress corrosion cracking, also can keep mechanical strength property and toughness even import the steam of high temperature.
And then on the viewpoint of embrittlement, 3.5Ni steel and 1Cr steel are roughly the same, but 2.25Cr steel and 10Cr are better than the 3.5Ni steel.Therefore, if use the parts that constitute the steam inlet side by the 1Cr steel, then the embrittlement receptance of rotor for low pressure turbine integral body is roughly the same with the rotor for low pressure turbine in the past that is made of rotor integral body the 3.5Ni steel, if but use the parts that constitute the steam inlet side by 2.25Cr steel or 10Cr steel, then the embrittlement receptance of rotor for low pressure turbine integral body is better than the rotor for low pressure turbine in the past that is made of rotor integral body the 3.5Ni steel.Therefore, more preferably the parts of steam inlet side are formed by 2.25Cr steel or 10Cr steel.
In addition, in the steam turbine installation that possesses high-pressure turbine, middle pressure turbine and low-pressure turbine in the employed rotor for low pressure turbine, it is characterized in that, the parts that are disposed at the steam inlet side by welding joint constitute with the parts that are disposed at the steam (vapor) outlet side, and, form two parts by the 3.5Ni steel, form the parts that are disposed at above-mentioned steam inlet side by the 3.5Ni steel that hangs down impurity.
In addition, described rotor for low pressure turbine is characterised in that, the low impurity 3.5Ni steel that is disposed at above-mentioned steam inlet side contains in weight %: Si:0.1% is following, below the Mn:0.1%, unavoidable impurities with weight % count below the P:0.02%, below the S:0.02%, below the Sn:0.02%, below the As:0.02%, below the Sb:0.02%, below the Al:0.02%, below the Cu:0.1%.
Be restricted to the parts that micro-3.5Ni steel constitutes by reducing impurity content in the steam inlet side use that imports high-temperature steam, thereby suppress to bring out the variation on the metal structure of timeliness embrittlement such as cyrystal boundary segregation of the impurity element that causes because of heating, even the steam that imports more than 380 ℃ also can runs steadily.
And, make the parts that constitute by the 3.5Ni steel that reduces above-mentioned impurity content only constitute the steam inlet side that imports high-temperature steam rather than constitute rotor integral body, thereby can suppress the increase of manufacture cost, duration, can make rotor for low pressure turbine also lessly the worry of the reliability of quality aspect.
In addition, described rotor for low pressure turbine is characterised in that, the inlet steam temperature that is used for above-mentioned low-pressure turbine is the steam turbine installation more than 380 ℃, being formed in the vapor (steam) temperature that circulates in the above-mentioned low-pressure turbine by the parts that are disposed at above-mentioned steam inlet side is zone more than 380 ℃, is formed in the zone that the vapor (steam) temperature that circulates in the above-mentioned low-pressure turbine is lower than 380 ℃ by the parts that are disposed at above-mentioned steam (vapor) outlet side.
Common 3.5Ni steel is that to bring out the possibility of timeliness embrittlement such as cyrystal boundary segregation of impurity element more than 380 ℃ the time higher in vapor (steam) temperature.Therefore, constituting vapor (steam) temperature by the parts that are configured in above-mentioned steam inlet side is zone more than 380 ℃, constitute the zone that vapor (steam) temperature is lower than 380 ℃ by the parts that are configured in above-mentioned steam (vapor) outlet side, thereby common 3.5Ni steel is not contacted with steam more than 380 ℃, can suppress to be disposed at the embrittlement of the parts that form by the 3.5Ni steel of steam (vapor) outlet side.
Described rotor for low pressure turbine is characterised in that, is used in above-mentioned high-pressure turbine and the pressure turbine inlet steam temperature of any one turbine at least and is in the steam turbine installation more than 630 ℃.
Thus, high-pressure turbine and the middle turbine of pressing are increased, cut down the CO that discharges from steam turbine installation
2Air displacement, the thermal efficiency of raising steam turbine installation.
As mentioned above, according to the present invention, can provide a kind of rotor for low pressure turbine, even it is under the situation of high temperature in the vapor (steam) temperature that imports to low-pressure turbine, also mechanical strength property be can keep, and then manufacture cost, manufacturing schedule increase and yet no problem aspect quality do not made.
Description of drawings
Fig. 1 is the figure of formation of expression embodiment's 1 steam turbine machine power generating equipment.
Fig. 2 is the plan view of formation that schematically shows embodiment 1 rotor for low pressure turbine.
Fig. 3 is the plan view of formation that schematically shows embodiment 2 rotor for low pressure turbine.
Fig. 4 is the plotted curve of the embrittlement coefficient of expression 1Cr steel, 2.25Cr steel, 10Cr steel and 3.5Ni steel.
Embodiment
Below, illustratively the preferred embodiments of the present invention are described in detail with reference to accompanying drawing.But, only be illustrative examples as long as the size of the component parts that this embodiment put down in writing, material, shape and relative configuration thereof etc. do not have specific especially record, scope of the present invention just to be not limited thereto.
[embodiment 1]
Fig. 1 is the figure of formation of expression embodiment's 1 steam turbine machine power generating equipment.
With reference to Fig. 1, to describing by the power generating equipment that steam turbine installation constituted of having used rotor for low pressure turbine of the present invention.In addition, Fig. 1 is an one-level example of heat again, and the present invention is applicable to that also there is no particular limitation in the secondary enforcement hot again, the only situation of hotter high temperatureization (more than 630 ℃).
Steam turbine machine power generating equipment 10 shown in Figure 1 mainly by high-pressure turbine 14, middle pressure turbine 12, low-pressure turbine 16, generator 18, condenser 20, and boiler 24 constitute.Steam is according to the sequential loop of boiler 24, main steam pipe 26, high-pressure turbine 14, cold reheat pipe 28, boiler 24, high temperature reheating pipe 30, middle pressure turbine 12, cross-over pipe 32, low-pressure turbine 16, condenser 20, feed water pump 22, boiler 24.
The steam that is superheated in boiler 24 more than 630 ℃ is directed to high-pressure turbine 14 through main steam pipe 26.The steam that is directed to high-pressure turbine 14 is discharged from after the acting of expanding, and turns back to boiler 24 through cold reheat pipe 28.The steam that turns back to this boiler 24 is become steam more than 630 ℃ at boiler 24 by heat again, press turbine 12 in being sent to through high temperature reheating pipe 30.Be directed to the steam of pressing turbine 12 and after the acting of expanding, be discharged from, become the steam about 400～430 ℃, and be sent to low-pressure turbine 16 through cross-over pipe 32.The steam that is directed to low-pressure turbine 16 is discharged from after the acting of expanding, and is sent to condenser 20.The steam that is sent to condenser 20 is by condenser 20 condensations, boosted and returned boiler 24 by feed water pump 22.Generator 18 is driven in rotation by the expansion acting of each turbine, generates electricity.
Fig. 2 is the plan view of formation that schematically shows embodiment 1 low-pressure turbine 16 employed rotors.
With reference to Fig. 2 the employed rotor for low pressure turbine of above-mentioned steam turbine machine power generating equipment is described.
(formation)
At first, use Fig. 2 that the formation of the low-pressure turbine 16 employed rotors of the steam of about 400～430 ℃ of the importings of present embodiment is described.
As shown in Figure 2, rotor for low pressure turbine 16A is made of following parts: parts (hereinafter referred to as the chromium steel portion) 16a that is made of 1Cr steel, 2.25Cr steel or 10Cr steel, and two parts being made of the 3.5Ni steel (hereinafter referred to as common 3.5Ni steel portion) 16b, 16c.
Respectively by the common 3.5Ni steel 16b of portion of welding joint, 16c, the order from an end according to the common 3.5Ni steel 16b of portion, the 16a of chromium steel portion, the Ni steel 16c of portion forms incorporate rotor for low pressure turbine 16A to the 16a of chromium steel portion at its two ends.
In addition, the 16a of chromium steel portion is configured in the position in the steam that is exposed to more than 380 ℃, and the 3.5Ni steel 16b of portion, 16c are configured in the position that is exposed in the steam that is lower than 380 ℃ usually.
(material)
Then, the 16a of chromium steel portion that constitutes rotor for low pressure turbine 16A, the material of the 3.5Ni steel 16b of portion, 16c are described.
(A) chromium steel portion
Chromium steel portion heat-resisting quantity is good, by 1Cr steel, 2.25Cr or the formation of 10Cr steel of easy acquisition.
As the 1Cr steel, the material that can enumerate following composition is as an example: with weight % count C:0.2～0.4%, below the Si:0.35%, below the Mn:1.5%, below the Ni:2.0%, Cr:0.5～1.5%, Mo:0.5～1.5%, V:0.2～0.3%, remainder is made of Fe and unavoidable impurities.
As the 2.25Cr steel, the material that can enumerate following composition is as an example: with weight % count C:0.2～0.35%, below the Si:0.35%, below the Mn:1.5%, Ni:0.2%～2.0%, Cr:1.5～3.0%, Mo:0.9～1.5%, V:0.2～0.3%, remainder is made of Fe and unavoidable impurities.
As the 10Cr steel, the material that can enumerate following composition is as an example: in weight %, contain that C:0.05～0.4%, Si:0.35% are following, Mn:2.0% is following, Ni:3.0% is following, Cr:7～13%, Mo:0.1～3.0%, V:0.01～0.5%, N:0.01～0.1%, Nb:0.01～0.2%, remainder is made of Fe and unavoidable impurities.
10Cr steel as other example, the material that can enumerate following composition is as an example: in weight %, contain that C:0.05～0.4%, Si:0.35% are following, Mn:2.0% is following, Ni:7.0% is following, Cr:8～15%, Mo:0.1～3.0%, V:0.01～0.5%, N:0.01～0.1%, below the Nb:0.2%, remainder is made of Fe and unavoidable impurities.
Fig. 4 is the plotted curve of the embrittlement coefficient of expression 1Cr steel, 2.25Cr steel, 10Cr steel and 3.5Ni steel.The longitudinal axis is embrittlement coefficient (Δ FATT), is as the easy finger target value of embrittlement, the high more and easy more embrittlement of the high more then embrittlement receptance of this numerical value.Transverse axis is J-Factor, is the finger target value as impurity concentration.As can be seen from Figure 4, each material is the high more easy more embrittlement of impurity concentration.And 1Cr steel and 3.5Ni steel are roughly the same embrittlement coefficient, and they are low for the embrittlement coefficient ratio of 2.25Cr steel, and the embrittlement coefficient of 10Cr steel is lower.
Therefore, constitute the parts that the 16a of chromium steel portion forms by the 1Cr steel, we can say that then the embrittlement receptance of rotor for low pressure turbine integral body is roughly the same with the rotor for low pressure turbine in the past that is made of rotor integral body the 3.5Ni steel if use.But, if use and constitute the parts that the 16b of chromium steel portion, 16c form by 2.25Cr steel or 10Cr steel, embrittlement receptance that then we can say rotor for low pressure turbine integral body is lower than be made of the rotor for low pressure turbine in the past that rotor integral body forms the 3.5Ni steel, promptly is difficult to embrittlement.Therefore, more preferably the 16a of chromium steel portion is formed by 2.25Cr steel or 10Cr steel.
(B) common 3.5Ni steel portion
As the 3.5Ni steel, can enumerate following material as an example: in weight %, contain that C:0.4% is following, Si:0.35% following, Mn:1.0% is following, Cr:1.0～2.5%, V:0.01～0.3%, Mo:0.1～1.5%, Ni:3.0～4.5%, remainder is made of Fe and unavoidable impurities.
(manufacture method)
Engage by the weld part that is welded between the 16a of chromium steel portion and common the 3.5Ni steel 16b of portion, the 16c.
For welding method, so long as can restraining oneself the state of the operating condition of low-pressure turbine, weld part gets final product, there is no particular limitation, but as an example, generally can enumerate the electric arc that produces to welding torch and supply with the fusing method of welding rod as bulking agent.
For example, shape as weld part, adopt narrow gap welding joint etc., when welding, utilize the fusion of electric arc generation and make the bulking agent lamination of supplying with as welding rod at each welding bead, utilize bulking agent to fill up in the above-mentioned narrow gap welding joint, the 16a of chromium steel portion and common the 3.5Ni steel 16b of portion, 16c are engaged.As above-mentioned bulking agent, use 3.5Ni steel with common 3.5Ni steel portion identical materials.
By using above rotor for low pressure turbine, can obtain following effect.
Because 1Cr steel, 2.25Cr steel, 10Cr steel are the materials that was used for high-pressure turbine usefulness rotor, pressure turbine usefulness rotor, so the management method of material is definite, also obtains easily in addition in the past.And, better than the heat-resisting quantity of 3.5Ni steel.In addition, the 3.5Ni steel is lower than stress corrosion cracking (SCC) receptance of 1Cr steel, 2.25Cr steel, 10Cr steel.Therefore, constitute the steam inlet side that imports high-temperature steam by the parts that form by 1Cr steel, 2.25Cr steel or 10Cr steel, constitute stream path (blade diameter) by the parts that constitute by the 3.5Ni steel and widen and require more high-intensity steam (vapor) outlet side, thereby form for high temperature and the good rotor for low pressure turbine of stress corrosion cracking, also can keep mechanical strength property even import the steam of high temperature.
In addition, common 3.5Ni steel is that to bring out the possibility of timeliness embrittlement such as cyrystal boundary segregation of impurity element more than 380 ℃ the time higher in vapor (steam) temperature.Therefore, constituting vapor (steam) temperature by the parts that are disposed at above-mentioned steam inlet side is zone more than 380 ℃, constitute the zone that vapor (steam) temperature is lower than 380 ℃ by the parts that are disposed at above-mentioned steam (vapor) outlet side, thereby common 3.5Ni steel is not contacted with steam more than 380 ℃, can suppress to be disposed at the embrittlement of the parts that form by the 3.5Ni steel of steam (vapor) outlet side.
And then, even make the inlet steam temperature of low-pressure turbine higher, also can keep the mechanical strength property of rotor for low pressure turbine, therefore than in the past, can not make high-pressure turbine and in press turbine to increase and use steam more than 630 ℃, can cut down the CO that discharges from steam turbine installation
2Air displacement, the thermal efficiency of raising steam turbine installation.
[embodiment 2]
(formation)
Rotor for low pressure turbine 16B to other forms among the embodiment 2 describes.
In embodiment 2, as shown in Figure 3, rotor for low pressure turbine 16B is made of following parts: parts that are made of the less low impurity 3.5Ni steel of impurity content (hereinafter referred to as low impurity 3.5Ni steel portion) 16d, and the common 3.5Ni steel 16b of portion, 16c.
That is, embodiment 2 be replace embodiment 1 shown in Figure 2 mode rotor for low pressure turbine the 16a of chromium steel portion and adopt the mode of the low impurity 3.5Ni steel 16d of portion.Below, since all identical except the low impurity 3.5Ni steel 16d of portion with embodiment 1, explanation therefore omitted.
In addition, the low impurity 3.5Ni steel 16d of portion is configured in the position in the steam that is exposed to more than 380 ℃, and the 3.5Ni steel 16b of portion, 16c are configured in the position that is exposed in the steam that is lower than 380 ℃ usually.
(material)
Material to the low impurity 3.5Ni steel 16d of portion describes.
The low impurity 3.5Ni steel 16d of portion is formed by the less 3.5Ni steel portion of impurity content.As the low impurity 3.5Ni steel 16d of portion, the material that can enumerate following composition is as an example: in weight %, contain below the C:0.4%, below the Si:0.1%, below the Mn:0.1%, Cr:1.0～2.5%, V:0.01～0.3%, Mo:0.1～1.5%, Ni:3.0～4.5%, remainder is made of Fe and unavoidable impurities, and above-mentioned unavoidable impurities is counted below the P:0.02% with weight %, below the S:0.02%, below the Sn:0.02%, below the As:0.02%, below the Sb:0.02%, below the Al:0.02%, below the Cu:0.1%.
(manufacture method)
Engage by the weld part that is welded between the low impurity 3.5Ni steel 16d of portion and common the 3.5Ni steel 16b of portion, the 16c.
As shown in Figure 4, for the 3.5Ni steel, impurity concentration is low more, and then fragility receptance is low more and be difficult to embrittlement more.
Therefore, be restricted to the parts 16d that micro-low impurity 3.5Ni steel constitutes by reducing impurity content in the steam inlet side use that imports high-temperature steam, thereby suppress to bring out the variation on the metal structure of timeliness embrittlement such as cyrystal boundary segregation of the impurity element that causes because of heating, even the steam that imports more than 380 ℃ also can runs steadily.
And, make the parts that constitute by the 3.5Ni steel that reduces above-mentioned impurity content only constitute the steam inlet side that imports high-temperature steam rather than constitute rotor integral body, thereby can suppress the increase of manufacture cost, duration, can make rotor for low pressure turbine also lessly the worry of the reliability of quality aspect.
In addition, common 3.5Ni steel is more than 380 ℃ the time in vapor (steam) temperature, and the possibility of timeliness embrittlement such as cyrystal boundary segregation of bringing out impurity element is higher.Therefore, constituting vapor (steam) temperature by the parts that are configured in above-mentioned steam inlet side is zone more than 380 ℃, constitute the zone that vapor (steam) temperature is lower than 380 ℃ by the parts that are configured in above-mentioned steam (vapor) outlet side, thereby common 3.5Ni steel is not contacted with steam more than 380 ℃, can suppress to be disposed at the embrittlement of the parts that form by the 3.5Ni steel of steam (vapor) outlet side.
And then, even the inlet steam temperature of low-pressure turbine is higher than in the past, also can keep the mechanical strength property of rotor for low pressure turbine, therefore can not make high-pressure turbine and in press turbine to increase and use steam more than 630 ℃, can cut down the CO that discharges from steam turbine installation
2Air displacement, and the thermal efficiency of raising steam turbine installation.
The present invention can utilize as following rotor for low pressure turbine: even it is under the situation of high temperature in the vapor (steam) temperature that imports to low-pressure turbine, also mechanical strength property be can keep, and then manufacture cost, manufacturing schedule increase and yet no problem aspect quality do not made.
Claims (5)
1. a rotor for low pressure turbine uses in the steam turbine installation that possesses high-pressure turbine, middle pressure turbine and low-pressure turbine, it is characterized in that,
By welding following part bonding is constituted:
Be disposed at the parts that form by 1CrMoV steel, 2.25CrMoV steel or 10CrMoV steel of steam inlet side; And
Be disposed at the parts that form by the 3.5Ni steel of steam (vapor) outlet side.
2. a rotor for low pressure turbine uses in the steam turbine installation that possesses high-pressure turbine, middle pressure turbine and low-pressure turbine, it is characterized in that,
The parts that will be disposed at the steam inlet side by welding constitute with the part bonding that is disposed at the steam (vapor) outlet side, and, form two parts by the 3.5Ni steel, form the parts that are disposed at above-mentioned steam inlet side by the 3.5Ni steel that hangs down impurity.
3. rotor for low pressure turbine as claimed in claim 2, it is characterized in that, the low impurity 3.5Ni steel that is disposed at above-mentioned steam inlet side contains in weight %: Si:0.1% is following, below the Mn:0.1%, unavoidable impurities with weight % count below the P:0.02%, below the S:0.02%, below the Sn:0.02%, below the As:0.02%, below the Sb:0.02%, below the Al:0.02%, below the Cu:0.1%.
4. rotor for low pressure turbine as claimed in claim 1 or 2 is characterized in that,
In being steam turbine installation more than 380 ℃, the inlet steam temperature of above-mentioned low-pressure turbine uses,
Being formed in the vapor (steam) temperature that circulates in the above-mentioned low-pressure turbine by the parts that are disposed at above-mentioned steam inlet side is zone more than 380 ℃,
Be formed in the zone that the vapor (steam) temperature that circulates in the above-mentioned low-pressure turbine is lower than 380 ℃ by the parts that are disposed at above-mentioned steam (vapor) outlet side.
5. as any described rotor for low pressure turbine in the claim 1～4, it is characterized in that, above-mentioned high-pressure turbine and in the pressure turbine at least the inlet steam temperature of any one turbine be to use in the steam turbine installation more than 630 ℃.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-207421 | 2008-08-11 | ||
| JP2008207421 | 2008-08-11 | ||
| PCT/JP2009/063896 WO2010018773A1 (en) | 2008-08-11 | 2009-07-30 | Rotor for low-pressure turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101772622A true CN101772622A (en) | 2010-07-07 |
Family
ID=41668918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980100092A Pending CN101772622A (en) | 2008-08-11 | 2009-07-30 | Rotor for low pressure turbine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20100202891A1 (en) |
| EP (1) | EP2312127A4 (en) |
| JP (1) | JP4995317B2 (en) |
| KR (2) | KR20130051014A (en) |
| CN (1) | CN101772622A (en) |
| WO (1) | WO2010018773A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109477387A (en) * | 2016-07-14 | 2019-03-15 | 西门子股份公司 | Armature spindle and method for manufacturing armature spindle |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012207594A (en) * | 2011-03-30 | 2012-10-25 | Mitsubishi Heavy Ind Ltd | Rotor of rotary machine, and rotary machine |
| US20130323075A1 (en) * | 2012-06-04 | 2013-12-05 | General Electric Company | Nickel-chromium-molybdenum-vanadium alloy and turbine component |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57126958A (en) * | 1981-01-28 | 1982-08-06 | Toshiba Corp | Low alloy steel for rotor |
| JPS57176305A (en) * | 1981-04-24 | 1982-10-29 | Hitachi Ltd | Steam turbine rotor |
| US4962586A (en) * | 1989-11-29 | 1990-10-16 | Westinghouse Electric Corp. | Method of making a high temperature - low temperature rotor for turbines |
| JP3315800B2 (en) * | 1994-02-22 | 2002-08-19 | 株式会社日立製作所 | Steam turbine power plant and steam turbine |
| JP3999402B2 (en) * | 1998-06-09 | 2007-10-31 | 三菱重工業株式会社 | Dissimilar welding rotor for steam turbine |
| JP3905739B2 (en) * | 2001-10-25 | 2007-04-18 | 三菱重工業株式会社 | 12Cr alloy steel for turbine rotor, method for producing the same, and turbine rotor |
| JP2003145271A (en) * | 2001-11-13 | 2003-05-20 | Mitsubishi Heavy Ind Ltd | Method for welding different kinds of steel grades |
| JP2006170006A (en) * | 2004-12-14 | 2006-06-29 | Toshiba Corp | Steam turbine power generation system and low pressure turbine rotor |
| JP4783053B2 (en) * | 2005-04-28 | 2011-09-28 | 株式会社東芝 | Steam turbine power generation equipment |
| JP2009520603A (en) * | 2005-12-22 | 2009-05-28 | アルストム テクノロジー リミテッド | Method for manufacturing a welded rotor in a low-pressure turbine |
| JP2007278064A (en) * | 2006-04-03 | 2007-10-25 | Hitachi Ltd | Steam turbine welded rotor and method of manufacturing it, and steam turbine and power generating plant using it |
| EP1860279A1 (en) * | 2006-05-26 | 2007-11-28 | Siemens Aktiengesellschaft | Welded LP-turbine shaft |
| JP4805728B2 (en) * | 2006-05-31 | 2011-11-02 | 株式会社東芝 | Steam turbine rotor and steam turbine |
| JP4908137B2 (en) * | 2006-10-04 | 2012-04-04 | 株式会社東芝 | Turbine rotor and steam turbine |
| JP5011931B2 (en) * | 2006-10-06 | 2012-08-29 | 株式会社日立製作所 | Steam turbine welding rotor |
-
2009
- 2009-07-30 JP JP2010502367A patent/JP4995317B2/en not_active Expired - Fee Related
- 2009-07-30 CN CN200980100092A patent/CN101772622A/en active Pending
- 2009-07-30 KR KR1020137009982A patent/KR20130051014A/en active Search and Examination
- 2009-07-30 KR KR1020107002529A patent/KR20100033421A/en active Application Filing
- 2009-07-30 EP EP09806066.8A patent/EP2312127A4/en not_active Withdrawn
- 2009-07-30 WO PCT/JP2009/063896 patent/WO2010018773A1/en active Application Filing
- 2009-07-30 US US12/674,022 patent/US20100202891A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109477387A (en) * | 2016-07-14 | 2019-03-15 | 西门子股份公司 | Armature spindle and method for manufacturing armature spindle |
| US11066933B2 (en) | 2016-07-14 | 2021-07-20 | Siemens Energy Global GmbH & Co. KG | Rotor shaft and method for producing a rotor shaft |
| CN109477387B (en) * | 2016-07-14 | 2021-09-03 | 西门子股份公司 | Rotor shaft and method for producing a rotor shaft |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010018773A1 (en) | 2010-02-18 |
| JP4995317B2 (en) | 2012-08-08 |
| KR20100033421A (en) | 2010-03-29 |
| US20100202891A1 (en) | 2010-08-12 |
| EP2312127A1 (en) | 2011-04-20 |
| KR20130051014A (en) | 2013-05-16 |
| JPWO2010018773A1 (en) | 2012-01-26 |
| EP2312127A4 (en) | 2015-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4520481B2 (en) | High temperature steam turbine plant | |
| CN101765702B (en) | Rotor of rotary machine and method for manufacturing same | |
| CN105066098A (en) | Header of 620-DEG C steam parameter ultra supercritical unit boiler | |
| CN101772622A (en) | Rotor for low pressure turbine | |
| CN106574506A (en) | Steam turbine rotor blade, method for manufacturing steam turbine rotor blade, and steam turbine | |
| CN101802349B (en) | Steam turbine equipment | |
| CN101809252B (en) | Steam turbine equipment | |
| Susta et al. | Supercritical and ultra-supercritical power plants-SEA’s vision or reality | |
| CN209413948U (en) | Cooling high-temperature rotor inside 640 DEG C ~ 650 DEG C steam turbines | |
| JP2010249050A (en) | Steam turbine and steam turbine installation | |
| JP5579910B1 (en) | Temperature reducing tube | |
| JP4934738B2 (en) | High temperature steam turbine plant | |
| CN105736069A (en) | Method for efficiency improvement and renovation of coal-fired thermal power generating unit | |
| Bittermann et al. | Turbine technologies for high performance light water reactors | |
| WO2015058370A1 (en) | Combined cycle power plant with heat storage device | |
| Buchta et al. | Steam Power Units on the Path to Increase the Efficiency of Electricity Generation | |
| Armor et al. | Supercritical fossil steam plants: Operational issues and design needs for advanced plants | |
| JP4745129B2 (en) | Steam turbine and steam turbine plant | |
| Marriott | Future materials requirements for high temperature power engineering components | |
| OKITA | Recent advances in technologies of high temperature and high pressure steam power cycle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: MITSUBISHI HITACHI POWER SYSTEM LTD. Free format text: FORMER OWNER: MITSUBISHI JUKOGIO KK Effective date: 20150303 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20150303 Address after: Kanagawa Applicant after: Mitsubishi Hitachi Power System Ltd. Address before: Tokyo, Japan, Japan Applicant before: Mit-subishi Heavy Industries Ltd. |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100707 |