CN103161512A - Steam turbine, blade, and method - Google Patents

Steam turbine, blade, and method Download PDF

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Publication number
CN103161512A
CN103161512A CN2012105334531A CN201210533453A CN103161512A CN 103161512 A CN103161512 A CN 103161512A CN 2012105334531 A CN2012105334531 A CN 2012105334531A CN 201210533453 A CN201210533453 A CN 201210533453A CN 103161512 A CN103161512 A CN 103161512A
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CN
China
Prior art keywords
blade
section
steamturbine
stator
longitudinal passage
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
Application number
CN2012105334531A
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Chinese (zh)
Inventor
M.格里利
E.焦斯蒂
E.英帕拉托
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nuovo Pignone SpA
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Nuovo Pignone SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nuovo Pignone SpA filed Critical Nuovo Pignone SpA
Publication of CN103161512A publication Critical patent/CN103161512A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
    • 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
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • 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
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • 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
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
    • 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
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
    • F01D9/044—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators permanently, e.g. by welding, brazing, casting or the like
    • 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
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • 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
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/31—Application in turbines in steam turbines
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
    • F05D2230/237—Brazing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making
    • Y10T29/49323—Assembling fluid flow directing devices, e.g., stators, diaphragms, nozzles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A stator blade ring for the last stage of a multi-stage steam turbine includes a plurality of stator blade modules defining an annular chamber, each stator blade module including an elongated blade portion. The elongated blade portion further includes a longitudinal passageway and an inner portion brazed to a first longitudinal end of the blade portion, the inner portion including a through hole forming a portion of the annular chamber 20 and an inner passageway extending from the through hole to the longitudinal passageway. An outer portion is brazed to a second longitudinal end of the blade portion and engaged to the steam turbine. The outer portion includes an outer passageway open to a surface of the steam turbine and the longitudinal passageway.

Description

Steamturbine, blade and method
Technical field
The present invention relates generally to steamturbine, and more specifically relates to for the stator blade ring of steamturbine and the method for making stator blade ring.
Background technique
Steamturbine is to convert the heat energy of steam and pressure energy to can be used for doing work the turbo machine that rotatablely moves.For example, steamturbine can be used for driving generator or compressor.
In order to improve steamturbine efficient, usually make steam pass through some grades expansion.The rotor assembly that each level generally includes stator vane dividing plate (diaphragm) and comprises the bearing installation of at least one impeller.
When steam advance by steamturbine than rear class the time, therefore can cause the part steam-condensation from the enough energy of this vapor absorption, and become so-called wet vapor.Except having potential corrosive action, when wet vapor was impacted the stator vane dividing plate, condensation product often collided the other parts of stator vane and dividing plate tempestuously.As a result, can damage the other parts than the stator vane in rear class and each stator vane dividing plate of steamturbine, for example in long term exposure during the wet vapor with condensation product at high proportion.
In the steamturbine in modern times, the manufacturing of stator vane dividing plate manifests significant cost, and particularly in the multistage steam turbine with three or more levels, wherein each grade can comprise the stator vane dividing plate of one or more separation.
If the stator vane dividing plate is damaged, the stator baffle that may need to make steamturbine shut down and remove damage is with maintenance.If spot repair is impossible, may need whole dividing plate is sent to keep in repair, perhaps alternatively, whole new stator baffle must be installed.Worse ground is feasible if change, and must make new stator vane dividing plate.Therefore, except the cost of stator baffle, also cause the cost relevant to the dead time of the prolongation of steamturbine.
Therefore, what need is that it easily keeps in repair and/or changes to the replacing of traditional stator blade dividing plate, and it can be in the situation that there be successful operation in wet vapor, and it provides the simple designs of more easily making.
Summary of the invention
According to an exemplary embodiment, a kind of stator blade ring for steamturbine comprises a plurality of stator vane modules that limit annular chamber, each stator vane module comprises the blade part of elongation, the second blade shell section that the blade part of this elongation comprises the first blade shell section and is brazed to the first blade shell section.The blade-section of elongation also comprise longitudinal passage and extend through the first blade shell section and the second blade shell section at least one opening to longitudinal passage.Interior section is brazed to the first longitudinal end of blade part, and interior section comprises the through hole of a part that forms annular chamber, and interior section also comprises the internal path that extends to longitudinal passage from through hole.Exterior section is brazed to the second longitudinal end of blade part and is engaged to steamturbine, and exterior section comprises the external path of opening to the surface of steamturbine and longitudinal passage.
According to another exemplary embodiment, a kind of turbo machine comprises rotor assembly, bearing and stator blade ring, wherein, rotor assembly comprises at least one impeller, bearing is connected to rotor assembly and is used for rotatably support rotor assembly, and stator blade ring has a plurality of stator vane modules that limit annular chamber.Each blade module comprises blade part, interior section and the exterior section of at least one elongation, the second blade shell section that the blade part of at least one elongation comprises the first blade shell section and is brazed to the first blade shell section, interior section is brazed to the first longitudinal end of described at least one blade part, interior section comprises the through hole of a part that forms annular chamber, and exterior section is brazed to the second longitudinal end of described at least one blade part and is engaged to the surface of steamturbine.At least one in blade module comprises longitudinal passage and is used at least one opening that liquid enters longitudinal passage at least one blade part, and comprise at interior section the internal path that extends to longitudinal passage from through hole, flow between annular chamber and longitudinal passage to allow liquid.At least one in blade module comprises longitudinal passage at least one blade part, comprise the internal path that extends to longitudinal passage from through hole allowing liquid to flow at interior section between annular chamber and longitudinal passage, and externally part comprise from longitudinal passage extend and the external path open to the surface of turbo machine with permission liquid outflow stator blade ring.
According to another exemplary embodiment, a kind of method that making is used for the blade module of stator blade ring can comprise the following steps: the first and second edges of the first blade shell section are brazed to the first and second edges of the second blade shell section, so that the blade part of the elongation with longitudinal passage to be provided; Form through hole in interior section; Form the internal path that the surface of part internally extends to through hole in interior section; The first longitudinal end of blade part is brazed to the surface of interior section, makes longitudinal passage to inner passage open; Externally form the external path that extends to second surface from the first surface of exterior section in the part; And, the second longitudinal end of blade part is brazed to the first surface of exterior section, make longitudinal passage to outside passage open.
Description of drawings
The accompanying drawing that is included in specification and consists of the part of this specification shows one or more embodiments, and these embodiments are described together with the description.In the accompanying drawings:
Fig. 1 has described steamturbine;
Fig. 2 shows the perspective view of an exemplary embodiment;
Fig. 3 shows the side view of the exemplary embodiment of Fig. 2;
Fig. 4 shows the sectional view of the exemplary embodiment shown in Fig. 2;
Fig. 5 to Fig. 7 shows the interior section of the exemplary embodiment shown in Fig. 2;
Fig. 8 to Figure 10 shows the exterior section of the exemplary embodiment shown in Fig. 2;
Figure 11 is the flow chart that the method for making the blade module that is used for stator blade ring is shown according to an exemplary embodiment.
Embodiment
The following description of exemplary embodiment is with reference to accompanying drawing.The identical same or similar element of labelled notation in different accompanying drawings.Below describe in detail and do not limit the present invention.But scope of the present invention is defined by the following claims.For the sake of simplicity, following examples are about the term of turbo machine with stator and rotor and structure and discuss.Yet the below is not limited to these example system with the embodiment who discusses, but applicable to other system.
Running through specification means to be included at least one embodiment of disclosed theme in conjunction with a described special characteristic of embodiment, structure or characteristic to mentioning of " embodiment " or " embodiment ".Therefore, run through specification in each local term " in one embodiment " that occurs or " in one embodiment " the identical embodiment of definiteness that differs.In addition, special characteristic, structure or characteristic can be combined in one or more embodiments with any suitable method.
Provide some linguistic context in order to give subsequently about the discussion according to the stator vane of these exemplary embodiments, Fig. 1 schematically shows the turbo machine that form is multistage steam turbine 400.Wherein, steamturbine 400 comprises shell (stator) 420, and some stator vane dividing plates 430 are arranged in stator 420 together with rotor shaft 450, and rotor shaft 450 is provided with a plurality of vane rotors 440.Axle 450 is supported by bearing 480 radial and axially.
During operation, steamturbine makes the steam input arrive the outlet 470 of leading to condenser by expansions at different levels from entrance 460.At each turbine stage, steam is directed on vane rotor 440 by stator baffle 430, and the temperature and pressure with steam can convert the rotation energy to thus, and it can be used for the merit at rotor shaft 450 places.
Fig. 2 shows the part according to the stator blade ring 12 of an exemplary embodiment of the present invention.Stator blade ring 12 comprises a plurality of independent stator vane module 14 that the rotor 28 (Fig. 3) in the steamturbine 10 extends.Fig. 2 shows two such blade module 14a and 14b.
Each stator vane module 14a, 14b comprise the blade part 16 of elongation, as shown in Fig. 2 and Fig. 3.Fig. 4 shows the sectional view of the blade part 16 of elongation, and it has longitudinal reinforced rib 24 and longitudinal passage 26.As further shown in Figure 4, blade part 116 also can be set to not be with strengthening rib 24 and therefore can have single longitudinal passage 26.As will be discussed in further detail below, each blade part 16 is made by the first blade shell section 18 is brazed to the second blade shell section 22 along its upstream edge 32 and downstream edge 34.
As at Fig. 2 to Fig. 4 further as shown in, at least one in blade shell section 22 and blade shell section 24 of each blade part 16 comprises a plurality of openings 36.In the embodiment of Fig. 2 to Fig. 4, each opening 36 is the lines of rabbet joint that are processed to form by discharge.Alternatively, opening 36 can form by other processing technology, for example boring or milling, and perhaps, opening 36 can form during the initial manufacturing of blade shell section 22 and blade shell section 24, for example passes through molded insert.
Each blade module 14 comprises the interior section 38 of the first longitudinal end that is connected at least one blade part 16, as shown in Figure 2.To embodiment shown in Figure 4, interior section 38 is brazed to blade part 16 at Fig. 2, as further discussing below.Each interior section 38 comprises through hole 42, and it laterally extends to the longitudinal axis 46 (Fig. 3) of blade part 16.When each in blade module was installed in steamturbine 10, through hole 42 formed the part of the annular chamber 20 in stator blade rings 12.In order to strengthen the sealing between the through hole 42 in adjacent blade module 14, at least one end of each through hole 42 can be provided with the groove 48 that is configured to receive seal washer.In the embodiment of Fig. 2 to Fig. 4, groove 48 is configured to receive O shape ring.
Each interior section 38 also comprises at least one internal path 44, and as shown in Figure 3, it extends to each longitudinal passage 26 from through hole 42.Alternatively, if strengthening rib 24 stopped before the longitudinal end of blade part 16, so single internal path 44 can be opened to two longitudinal passages 26.
Each stator vane module 14 also comprises the exterior section 52 of the second longitudinal end that is connected at least one blade part 16, as shown in Fig. 2 and Fig. 3.Each exterior section 52 comprises at least one external path 54, and its internal surface to each longitudinal passage 26 and steamturbine 10 is opened, as shown in Fig. 2, Fig. 9 and Figure 10.In addition, in the embodiment of Fig. 2 to Fig. 4 and Fig. 8 to Figure 10, each exterior section can comprise groove 74 on its at least one side.Groove 74 can be configured to receive packing ring, is used for adjacent exterior section 52 is sealed each other and/or is used for providing damping to stator blade ring 12.Stator blade ring 12 can be used for steamturbine 10 one of them than in rear class, as shown in Figure 2.During operation, the condensation product from the wet vapor of impacting each blade part 16 can enter by one of them opening 36 longitudinal passage 26 of blade part 16.More impossibly the member of steamturbine 10 is caused before the position of damage leaves stator blade ring 12 at condensation product, a plurality of paths can be used for condensation product and advance in blade module 14.In a path of the stator vane module 14 above can comprising rotor shaft, condensation product can be advanced downwards by each longitudinal passage 26 and internal path 44 in through hole 42.The open through hole 42 permission condensation products annular chamber 20 that formation is extended around stator blade ring 12, in adjacent blades module 14 utilize gravity to continue to flow downward.Condensation product can leave the internal path 44 of annular chamber 20 and the blade module 14 below the rotor shaft of steamturbine 10 is passed through in continuation on downward path.At last, condensation product can flow through external path 54 to the surface of the steamturbine of blade ring 12 outsides.
In another path, condensation product can enter steamturbine 10 rotor shaft below blade part 16 longitudinal passage 26 and flow out by external path 54, rather than at first advance by the annular chamber 20 that is formed by through hole 42.
Condensation product is removed from the wet vapor than rear class by steamturbine 10 of advancing to prevent to stator blade ring 12 and to the turbine blade 16 of steamturbine 10 and the damage of other downstream member.In addition, stator blade ring 12 allows the collection of condensation product, and this condensation product can comprise the waste heat for other process.
Some blade modules, the blade module of the rotor shaft of steamturbine 10 top for example, can be made as without external path 54, for example reducing manufacture cost, because flowing downward of condensation product can be got rid of needs to the external path 54 in the blade module 14 of rotor shaft top.In addition, some blade modules 14 can be provided with the blade part 16 of not being with the line of rabbet joint, for example with further reduction manufacture cost.Alternatively and as shown in the embodiment of Fig. 2 to Fig. 3 and Fig. 5 to Figure 10, each in blade module 14 can be mutually the same.This feature provides some benefits.For example, make manufacture process more balanced.And the maintenance of steamturbine 10 is also convenient because, because of this exemplary embodiment possible to the repairing of individual blade module 14 or between the stage of replacement, only need single part number, because all blade modules 14 are equal in stator blade ring 12.
Except providing on the stator vane dividing plate that may need to be keeped in repair or change as the unit cost savings, blade module 14 provides the simple single type design of more easily installing and/or changing than traditional stator blade diaphragm rings.As shown in Fig. 2, Fig. 3 and Fig. 8 to Figure 10, the exterior section 52 of each stator vane module 14 directly is engaged to steamturbine 10.Particularly, each exterior section 52 comprises upstream recess 56 and downstream groove 58.Steamturbine 10 comprises the upstream spine 62 of engagement grooves 56 and the downstream spine 64 of engagement grooves 58.Groove 56 is setovered than the more close interior section 38 of groove 58.Biasing between groove 56 and 58 can allow each stator vane module to meet better expectation flow path by the steam of steamturbine 10, and can prevent the technician build or maintenance stator blade ring 12 during by mistake with the incorrect directed blade module 14 of installing.
As shown in Fig. 2 and Fig. 3, external path 54 is opened to the surface of the steamturbine 10 between spine 62 and spine 64.Notice, chamber 76 is formed between the surface of the outer surface of blade ring 12 and steamturbine 10.Chamber 76 can be beneficial to the convenient of condensation product that flows out external path 54 and collect.
Groove 66 in each interior section 38 forms towards the continuous circumferential recess at the center of stator blade ring 12, as shown in Fig. 2, Fig. 3 and Fig. 5 to Fig. 7.As shown in Figure 3, each groove 66 is engaged by metal ring 68, and this metal ring 68 locks together stator vane module 14.
As shown in further in Fig. 2, Fig. 3 and Fig. 5 to Fig. 7, the interior section 38 of each stator vane module 14 limits around the inside braze welding flat 72 of the first longitudinal end of each blade part 16.In addition, as shown in Fig. 2, Fig. 3 and Fig. 8 to Figure 10, the exterior section 52 of each stator vane module limits around the outside braze welding flat 74 of the second longitudinal end of each blade part 16.
The surface that braze welding flat 72 and braze welding flat 74 are provided convenience is with longitudinal end and the level in restriction steamturbine 10 and/or the part of vapor flow path of each blade part 16 of soldering.It may be noted that from Fig. 2 and Fig. 3 the braze welding flat 74 of each exterior section 52 is transitioned into the circumferential surface of steamturbine 10 equably.
In the embodiment of Fig. 2 to Fig. 4, can be with 18 vacuum brazings of blade shell section to blade shell section 22.Then can be with the first and second longitudinal end vacuum brazings of gained blade part 16 interior section 38 and exterior section 52 to each stator vane module 14.Vacuum brazing equipment that be used for to carry out the vacuum brazing of dividing plate 14 can be the vacuum brazing equipment of standard, as for example sequence number be disclosed in 4874918 and 4401254 U. S. Patent, its disclosure is incorporated herein by reference.
Therefore, according to the exemplary embodiment shown in Figure 11, a kind of method (1000) that making is used for the blade module of stator blade ring can comprise the following steps, described blade module comprises blade part, interior section and the exterior section of elongation: with the first and second edge solderings (1002) of the first blade shell section the first and second edges to the second blade shell section, to form longitudinal passage in the blade part of elongation; Form (1004) through hole in interior section; Form (1006) and extend to the internal path of through hole from the surface of this interior section in interior section; With the first longitudinal end soldering (1008) of blade part surface to interior section, make longitudinal passage to inner passage open; Externally form (1010) in the part and extend to the external path of second surface from the first surface of exterior section; And, with the second longitudinal end soldering (1012) of blade part first surface to exterior section, make longitudinal passage to outside passage open.
The present invention will be described in all respects rather than restriction for above-mentioned exemplary embodiment intention.Therefore, the present invention can have a lot of modification in implementing in detail, and it can be derived by the description that those skilled in the art comprise from literary composition.All these type of variations and modification all are considered to drop in the scope and spirit of the present invention that are defined by the following claims.Unless clearly describe so, it is requisite or essential that the element that uses in the application's description, action or instruction should not be construed as.And as used in this article, word " " intention comprises one or more.

Claims (10)

1. stator blade ring that is used for steamturbine, described stator blade ring comprises:
Limit a plurality of stator vane modules of annular chamber, each stator vane module comprises:
The blade part of elongation, the second blade shell section that it comprises the first blade shell section and is brazed to described the first blade shell section, the blade part of described elongation also comprise longitudinal passage and extend through described the first blade shell section and described the second blade shell section at least one at least one opening to described longitudinal passage;
Interior section, it is brazed to the first longitudinal end of described blade part, and described interior section comprises the through hole of a part that forms described annular chamber, and described interior section also comprises the internal path that extends to described longitudinal passage from described through hole; And
Exterior section, it is brazed to the second longitudinal end of described blade part and is engaged to described steamturbine, and described exterior section comprises the external path of opening to the surface of described steamturbine and described longitudinal passage.
2. stator blade ring according to claim 1, it is characterized in that, described exterior section comprises the first groove and the second groove, described the first groove is configured to engage the first spine in the described surface of described steamturbine, and described the second groove is configured to engage the second spine in the described surface of described steamturbine.
3. stator blade ring according to claim 2, is characterized in that, described the first groove and described the second groove are setovered with respect to described interior section.
4. stator blade ring according to claim 3, it is characterized in that, groove in the described interior section of each described blade module forms circumferential recess in described stator blade ring, and described circumferential recess is engaged by metal ring, and described metal ring is used for described a plurality of blade modules are locked together.
5. stator blade ring according to claim 4, is characterized in that, described circumferential recess is inwardly towards the center of described stator blade ring.
6. multistage steam turbine comprises:
Rotor assembly, it comprises at least one impeller;
Bearing, it is connected to described rotor assembly and is used for rotatably supporting described rotor assembly;
Be used for the stator blade ring of the final stage of described steamturbine, it has a plurality of stator vane modules that limit annular chamber, and each blade module comprises:
The blade part of at least one elongation, the second blade shell section that it comprises the first blade shell section and is brazed to described the first blade shell section;
Interior section, it is brazed to the first longitudinal end of described at least one blade part, and described interior section comprises the through hole of a part that forms described annular chamber; And
Exterior section, the surface that it is brazed to the second longitudinal end of described at least one blade part and is engaged to described steamturbine;
Wherein, the described blade part of at least one in described blade module comprises longitudinal passage and is used for the opening that steam condensate enters described longitudinal passage, and, the described interior section of described at least one blade module comprises the internal path that extends to described longitudinal passage from described through hole, is used for described steam condensate and flows between described annular chamber and described longitudinal passage; And
Wherein, the described blade part of another in described at least one blade module comprises longitudinal passage, the described interior section of described another blade module comprises the internal path that extends to described longitudinal passage from described through hole, to allow described steam condensate to flow between described annular chamber and described longitudinal passage, and, the described exterior section of described another blade module comprises the external path that extends and open to the described surface of described turbo machine from described longitudinal passage, flows out described stator blade ring to allow described steam condensate.
7. steamturbine according to claim 6, is characterized in that, the first groove in the described exterior section of each described blade module is by described lip-deep first spine member of described steamturbine.
8. steamturbine according to claim 7, is characterized in that, the second groove in the described exterior section of each described blade module is by described lip-deep second spine member of described steamturbine.
9. steamturbine according to claim 8, is characterized in that, the downstream of the upstream of the working fluid stream of described the first groove surface in the described turbo machine and described the second groove surface working fluid stream in the described turbo machine.
10. a making is used for the method for blade module of stator blade ring of the final stage of steamturbine, and described blade module comprises blade part, interior section and the exterior section of elongation, and described method comprises:
The first and second edges of the first blade shell section are brazed to the first and second edges of the second blade shell section, to form longitudinal passage in the blade part of described elongation;
Form through hole in described interior section;
Form in described interior section and extend to the internal path of described through hole from the surface of described interior section;
The first longitudinal end of described blade part is brazed to the described surface of described interior section, makes described longitudinal passage open to described internal path;
Form the external path that extends to second surface from the first surface of described exterior section in described exterior section; And
The second longitudinal end of described blade part is brazed to the described first surface of described exterior section, makes described longitudinal passage open to described external path.
CN2012105334531A 2011-12-12 2012-12-12 Steam turbine, blade, and method Pending CN103161512A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITCO2011A000060 2011-12-12
IT000060A ITCO20110060A1 (en) 2011-12-12 2011-12-12 STEAM TURBINE, PALLET AND METHOD

Publications (1)

Publication Number Publication Date
CN103161512A true CN103161512A (en) 2013-06-19

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Application Number Title Priority Date Filing Date
CN2012105334531A Pending CN103161512A (en) 2011-12-12 2012-12-12 Steam turbine, blade, and method

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US (1) US20130149106A1 (en)
EP (1) EP2604801B1 (en)
JP (1) JP6163299B2 (en)
KR (1) KR102016170B1 (en)
CN (1) CN103161512A (en)
CA (1) CA2797235C (en)
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