WO2020175192A1 - タービン静翼、及び蒸気タービン - Google Patents
タービン静翼、及び蒸気タービン Download PDFInfo
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- WO2020175192A1 WO2020175192A1 PCT/JP2020/005867 JP2020005867W WO2020175192A1 WO 2020175192 A1 WO2020175192 A1 WO 2020175192A1 JP 2020005867 W JP2020005867 W JP 2020005867W WO 2020175192 A1 WO2020175192 A1 WO 2020175192A1
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- WIPO (PCT)
- Prior art keywords
- turbine
- region
- steam
- flow
- hydrophilic
- 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.)
- Ceased
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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
- 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
- F01D5/141—Shape, i.e. outer, aerodynamic form
-
- 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
- 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
- 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
- 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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
-
- 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
- F05D2260/00—Function
- F05D2260/60—Fluid transfer
- F05D2260/602—Drainage
-
- 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
- F05D2270/00—Control
- F05D2270/01—Purpose of the control system
- F05D2270/16—Purpose of the control system to control water or steam injection
-
- 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
- F05D2300/50—Intrinsic material properties or characteristics
- F05D2300/51—Hydrophilic, i.e. being or having wettable properties
Definitions
- the present invention relates to a turbine vane, and a steam turbine.
- a steam turbine includes a rotating shaft rotatable about an axis, a plurality of turbine rotor blade stages arranged on the outer peripheral surface of the rotating shaft at intervals in the axial direction, the rotating shaft, and an turbine.
- a casing that covers the rotor blade stages from the outer peripheral side and a plurality of turbine vane stages that are alternately arranged with the turbine rotor blade stages on the inner peripheral surface of the casing are provided.
- An inlet port for taking in steam from the outside is formed on the upstream side of the casing, and an exhaust port is formed on the downstream side. The high-temperature, high-pressure steam taken in through the suction port is adjusted in the direction and speed of the flow in the turbine vane stage, and then converted into the rotational force of the rotating shaft in the turbine blade stage.
- an extraction port for sucking a liquid film is formed on the surface of the turbine stationary blade, and a hydrophilic port that spreads from the leading edge side of the turbine stationary blade toward this extraction port.
- the removal surface is formed. It is said that after the liquid film moves along the removal surface, it can be sucked up by the extraction port.
- Patent Document 1 Japanese Patent Laid-Open No. 20 1 7 _ 1 0 6 4 5 1 Summary of Invention
- the present invention has been made to solve the above problems, and an object of the present invention is to provide a turbine stationary blade and a steam turbine that can further reduce the growth of a liquid film.
- a turbine vane according to an aspect of the present invention has a belly surface that extends in a radial direction intersecting the flow direction of steam and that faces an upstream side in the flow direction, and a downstream side in the belly surface.
- a slit is formed on the upstream side of the slit, and a hydrophilic uneven region having a larger liquid film allowable amount than the abdominal surface is formed on the upstream side of the slit by recessing in the depth direction intersecting the abdominal surface.
- the dimension in the depth direction is larger and the flow resistance is smaller toward the slit toward the downstream side.
- the depth of the hydrophilic concavo-convex region is increased toward the downstream side toward the slit.
- the hydrophilic concavo-convex region it is possible to retain more droplets on the downstream side.
- the upstream edge leading edge
- the droplet from the leading edge to the trailing edge may form a liquid film midway. That is, the flow rate of droplets increases from the upstream side to the downstream side.
- the droplets can be retained by the hydrophilic unevenness area and can be scattered to the downstream side of the turbine vane. Can be reduced.
- the hydrophilic irregularity region has a plurality of convex portions arranged at intervals in the flow direction and the radial direction, and between the convex portions in the flow direction. Is !- 3 and the dimension of the convex part in the flow direction is [-], 1_ The value of the swallow may be smaller toward the downstream side toward the slit.
- the projection may have a rectangular cross section when viewed in a direction orthogonal to the abdominal surface and a rectangular cross section when viewed in the radial direction.
- the convex portion is rectangular when viewed in the direction orthogonal to the belly surface, and has a rectangular cross section when viewed in the radial direction. Therefore, for example, the convex portion can be formed more easily and cheaply as compared with the case where the convex portion has a polygonal shape other than a rectangular shape or a cylindrical shape. As a result, the cost and time required to manufacture the turbine vane can be reduced.
- the dimension in the depth direction may gradually increase in the hydrophilic uneven region from the upstream side to the downstream side in the flow direction.
- the dimension in the depth direction gradually increases from the upstream side to the downstream side.
- region can be formed more simply and cheaply compared with the structure where the dimension of a depth direction becomes large continuously.
- the turbine vane may further include a water-repellent region provided on the upstream side of the hydrophilic uneven region in the flow direction and having a higher water-repellent property than the abdominal surface.
- the water-repellent region is more water-repellent than the abdominal surface, before the droplets attached to the water-repellent region gather to form a larger liquid film, the vapor flow is prevented. Ride and flow off to the downstream side. That is, the droplet can be made to flow to the downstream side in the state of being a fine droplet. As a result, it is possible to further suppress the formation of the liquid film due to the liquid droplets having a large particle diameter flowing to the downstream side.
- a steam turbine includes a rotating shaft rotatable about an axis, and a plurality of evening vane blades arranged on an outer peripheral surface of the rotating shaft in a circumferential direction with respect to the axial direction.
- a plurality of turbine stationary blades according to any one of the above aspects are provided adjacent to the turbine moving blade in the axial direction.
- FIG. 1 is a schematic view showing a configuration of a steam turbine according to an embodiment of the present invention.
- FIG. 2 A perspective view showing a configuration of a turbine vane according to the first embodiment of the present invention.
- FIG. 3 is an enlarged view showing the configuration of the ventral surface of the turbine vane according to the first embodiment of the present invention.
- Fig. 4 is a sectional view taken along line 8_8 in Fig. 3.
- FIG. 5 is an enlarged cross-sectional view of the hydrophilic unevenness region according to the first embodiment of the present invention.
- FIG. 6 is an explanatory view showing the behavior of water droplets in the hydrophilic uneven region according to the first embodiment of the present invention.
- FIG. 7 is a perspective view showing the configuration of a turbine vane according to a second embodiment of the present invention. MODE FOR CARRYING OUT THE INVENTION
- the steam turbine 100 includes a steam turbine rotor 3 extending along the axis 0 direction, a steam turbine casing 2 covering the steam turbine rotor 3 from the outer peripheral side, and a shaft of the steam turbine rotor 3.
- a journal bearing 48 that supports the end 1 1 rotatably around the axis ⁇ and a thrust bearing 4 are provided.
- the steam turbine rotor 3 has a rotating shaft 1 extending along the axis O and a plurality of moving blades 30 provided on the outer peripheral surface of the rotating shaft 1.
- a plurality of rotor blades 30 are arranged at regular intervals in the circumferential direction of the rotary shaft 1. Even in the direction of the axis ⁇ , a plurality of rows of moving blades 30 are arranged at regular intervals.
- Rotor blade 30 ⁇ 02020/175192 6 ⁇ (: 171?2020/005867
- the rotor blade body 31 projects radially outward from the outer peripheral surface of the steam turbine rotor 3.
- the blade main body 31 has a blade-shaped cross section when viewed in the radial direction.
- a blade shroud 34 is provided at the tip (radially outer end) of the blade main body 31.
- the steam turbine casing 2 has a substantially tubular shape that covers the steam turbine rotor 3 from the outer peripheral side.
- a steam supply pipe 12 for taking in the steam 3 is provided on one side of the steam turbine casing 2 in the direction of the axis ⁇ .
- a steam discharge pipe 13 for discharging the steam 3 is provided on the other side of the steam turbine casing 2 in the direction of the axis ⁇ .
- the steam flows inside the steam turbine casing 2 from one side in the direction of the axis ⁇ to the other side.
- the flow direction of steam is simply called "flow direction”.
- the side where the steam supply pipe 12 is located as seen from the steam discharge pipe 13 is called the upstream side in the flow direction
- the side where the steam discharge pipe 13 is located as seen from the steam supply pipe 12 is defined as the flow direction. Call it the downstream side.
- the vane 20 has a vane body 21 (turbine vane), a vane shroud 2 2, and a vane pedestal 24.
- the vane body 21 is a vane-shaped member connected to the inner peripheral surface of the steam turbine casing 2 via the vane base 24.
- a vane shroud 22 is provided at the tip portion (radially inner end) of the vane body 21.
- a plurality of stationary blades 20 are arranged on the inner peripheral surface in the circumferential direction and along the direction of the axis ⁇ .
- the moving blades 30 are arranged so as to enter the area between the plurality of adjacent stationary blades 20. That is, the stationary blades 20 and the moving blades 30 extend in a direction (radial direction with respect to the axis O) intersecting the flow direction of steam.
- the steam 3 is supplied to the inside of the steam turbine casing 2 configured as described above via the steam supply pipe 12 on the upstream side. While passing through the inside of the steam turbine casing 2, the steam 3 alternately passes through the stationary blades 20 and the moving blades 30. The stationary vanes 20 straighten the flow of steam 3, and the rectified mass of steam 3 pushes the moving blades 30. ⁇ 02020/175192 7 ⁇ (: 171?2020/005867
- the rotational force of the steam turbine rotor 3 is extracted from the shaft end 11 and used to drive external equipment (such as a generator). With the rotation of the steam turbine rotor 3, the steam 3 is discharged toward a subsequent device (condenser, etc.) through the steam discharge pipe 13 on the downstream side.
- the journal bearing 48 supports a load in the radial direction with respect to the axis O.
- One journal bearing 48 is provided at each end of the steam turbine rotor 3.
- Thrust bearing 4 supports the load in the direction of the axis ⁇ .
- the thrust bearing No. 4 is provided only at the upstream end of the steam turbine rotor 3.
- the stationary vane main body 21 extends in a radial direction (a radial direction with respect to the axis O) which is a direction intersecting the flow direction.
- the cross section of the stationary vane main body 21 as viewed from the radial direction has an airfoil shape. More specifically, the leading edge 21 which is the upstream edge in the flow direction has a curved shape. Trailing edge 2 1 which is the downstream edge Has a taper shape as the size in the circumferential direction gradually decreases when viewed from the radial direction. Leading edge 2 1 to Trailing edge 2 1 On the other hand, the stationary blade main body 21 is gently curved from one side in the circumferential direction with respect to the axis 0 toward the other side.
- a surface on one side in the circumferential direction of the stationary blade main body 21 is a back surface 210 facing the downstream side in the flow direction.
- the back surface 210 has a curved surface that is convex toward one side in the circumferential direction.
- the surface of the stationary vane main body 21 on the other side in the circumferential direction is the belly surface 21 facing the upstream side in the flow direction.
- the abdominal surface 21 has a curved surface that is concave toward one side in the circumferential direction.
- the end surface of the stationary blade main body 21 facing inward in the radial direction is an inner peripheral side end surface 21 and the end surface facing outward in the radial direction is an outer peripheral side end surface 21.
- the vane shroud 22 and the vane pedestal 24 shown in FIG. 1 are omitted in FIG.
- the outer peripheral side end surface 2 1 is a portion deviated to the side of the ridge (that is, the inner peripheral side end surface 2
- Slit 5 and hydrophilic recesses are provided on the outer peripheral side end face 2 1 8 (closer to 18). ⁇ 02020/175192 8 ⁇ (: 171?2020/005867
- the convex area 6 is formed.
- the slit 5 is a rectangular hole extending in the radial direction on the ventral surface 21.
- the long side of the slit 5 extends in the radial direction, and the short side extends in the above-mentioned flow direction.
- the slit 5 is formed to capture the liquefied component (droplet) of the vapor flowing from the front edge 21 side to the rear edge 21 side along the ventral surface 21. ing.
- the slit 5 is connected to a flow channel (not shown) formed inside the stationary vane main body 21, and the captured droplets are sent to the outside of the stationary vane main body 21 through this flow channel.
- the hydrophilic concave-convex region 6 is adjacent to the slit 5 and extends to the upstream side (leading edge 21) in the flow direction.
- the hydrophilic unevenness area 6 has a higher hydrophilicity than the abdominal surface 21 and does not repel liquid droplets flowing from the front edge 21 side along the abdominal surface 21 and does not repel the trailing edge 21 side. It is provided for flowing into slit 5.
- the hydrophilic uneven region 6 is divided into three regions in the flow direction from the leading edge 21 side to the trailing edge 21 side.
- the region on the most leading edge 21 side is the first region 61, and the region on the most trailing edge 21 side is the third region 63.
- the area between the first area 6 1 and the third area 6 3 is the second area 6 2.
- the liquid film allowable amount in the second region 62 is larger than that in the first region 61.
- the liquid film allowable amount is larger in the third region 63 as compared with 2.
- the “liquid film allowable amount” mentioned here indicates the permeation amount and the retention amount of the liquid film in the region. The permeation amount and the retention amount are determined by the porosity in the area.
- the flow resistance to the droplet is smaller in the second region 6 2 than in the first region 6 1. In the third region 63, the flow resistance to the droplets is smaller than that in the second region 62.
- the first region 61, the second region 62, and the third region 63 are: Each has a plurality of convex knives.
- the convex section has a rectangular shape when viewed in a direction orthogonal to the belly surface 21 and has a substantially rectangular cross section when viewed in the radial direction.
- the protrusions in the first region 61 have, for example, a square shape when viewed from the direction orthogonal to the abdominal surface 21.
- the first convex portion 6 1 ⁇ 02020/175192 9 ((171?2020/005867
- the protrusions (second protrusions 62) of the second region 62 have a rectangular shape when viewed from the direction orthogonal to the abdominal surface 21. Specifically, the dimension in the flow direction is set slightly longer than that of the first convex portion 61. Similar to the first convex portion 61, the second convex portion 62 is also arranged in a grid pattern with a space in the flow direction and the radial direction.
- the convex portion of the third region 63 (third convex portion 63) has a rectangular shape whose dimension in the flow direction is set longer than that of the second convex portion 62. Similar to the second convex portion 62, the third convex portion 63 is also arranged in a lattice shape with a space in the flow direction and the radial direction.
- the spaces formed between the protrusions are the flow paths.
- This flow path is formed by connecting a space formed between a pair of radially adjacent protrusions in the flow direction. As will be described later in detail, a part of the droplets and the vapor can flow in the flow direction through this flow path.
- the height of the bottom face in the direction orthogonal to the abdominal face 2 1 is increased from the first region 6 1 to the third region 6 3. It is changing step by step. More specifically, the distance (dimension in the depth direction) from the ventral face 21 to the bottom face gradually increases toward the slit 5.
- the bottom surface of the second region 62 (second bottom surface 62) is formed deeper than the bottom surface of the first region 61 (first bottom surface 61 1).
- the bottom surface of the third region 63 (third bottom surface 63) is formed deeper than the second bottom surface 62.
- the _th bottom face 61, the second bottom face 62, and the third bottom face 63 are formed along the ventral face 21.
- the first bottom face 61, the second bottom face 62, and the third bottom face 6 3 are described as having planar shapes.
- the first bottom face 61, the second bottom face 62, and the third bottom face 63 are also curved.
- 3rd bottom surface 6 3 Slit 5 ⁇ 02020/175192 10 (:171?2020/005867
- the dimension ratio of the convex portion is 1_.
- the value of the dip gradually decreases from the first region 61 to the third region 63. More specifically, the distance between the first end face 1 that faces the upstream side in the flow direction of the convex part and the second end face 2 that faces the downstream side of another convex part adjacent to this convex part. The separation is said to be 1-3.
- the dimension from the first end surface knife 1 to the second end surface knife 2 in one convex part (that is, the size of the top surface part 3 of the convex part in the flow direction) is (-).
- the value of this dimension ratio !_ ⁇ is set to a value smaller than 1. More preferably, 1- 3 / 1_ 13 ⁇ 0.8. It is said to be 5.
- the hydrophilic unevenness region 6 exhibits high hydrophilicity.
- the "highly hydrophilic” state here refers to a state in which a droplet attached to the hydrophilic unevenness area has a contact angle smaller than 90 ° with respect to the surface of the hydrophilic unevenness area. , The state where the contact angle is less than 5 ° is called superhydrophilic.
- Mari above dimensional ratio
- the pulling force of the droplet per unit length of the channel becomes smaller. Therefore, as shown in FIG. 6, in the second region 62, the pulling force due to the droplets captured between the second convex portions 62 is smaller than that in the first region 61. Similarly, in the third region 63, the pulling force by the droplets captured between the third convex portions 63 is smaller than that in the second region 62. That is, in the hydrophilic uneven region 6, the flow resistance to the steam flow 3 becomes smaller as it goes toward the slit 5 toward the downstream side.
- the temperature of the steam passing through the steam turbine casing 2 decreases as it goes from the upstream side to the downstream side. Therefore, in the turbine vane stage on the most downstream side, part of the vapor is liquefied and adheres to the surface of the vane body 21 as droplets (water droplets). This droplet gradually grows into a liquid film. When the liquid film grows further, a part of it breaks and scatters as coarse droplets. The scattered droplets try to flow on the downstream side along with the main stream of steam, but the coarse liquid cannot act on the main stream sufficiently because the inertial force acting on itself is large, and the turbine blade (rotor blade) Collide with the main body 3 1).
- peripheral speed of the turbine rotor blade may exceed the speed of sound, when the scattered droplets collide with the turbine rotor blade, they may erode the surface and cause erosion. Also, the collision of droplets may hinder the rotation of the evening blades, resulting in braking loss.
- the slit 5 and the hydrophilic uneven region 6 are formed on the abdominal surface 21. Therefore, most of the droplet can be captured by the slit 5, and the possibility of scattering toward the downstream side can be reduced. Further, since the hydrophilic unevenness region 6 having a larger liquid film allowable amount than the abdominal surface 21 is formed on the upstream side of the slit 5, the droplets attached to the hydrophilic unevenness region 6 are Immediately after the adhesion, it diffuses into the hydrophilic concave/convex area 6 and fits in. As a result, it is possible to reduce the possibility that droplets will aggregate and grow. ⁇ 02020/175192 12 (:171?2020/005867
- the upstream edge leading edge 21
- the depth of the hydrophilic unevenness region 6 increases toward the slit 5 toward the downstream side.
- the hydrophilic concave-convex region 6 it is possible to retain more droplets on the downstream side. That is, the apparent liquid film allowable amount increases toward the downstream side. Therefore, even if more droplets are attached midway from the upstream side to the downstream side, the droplets can be held by the second area 62 or the third area 63 of the hydrophilic uneven area 6. The possibility of scattering to the downstream side of the stationary blade body 21 can be reduced.
- the convex section has a rectangular cross section when viewed in a direction orthogonal to the abdominal surface 21 and a rectangular cross section when viewed in the radial direction. Therefore, as compared with the case where the convex section has a polygonal shape other than a rectangular shape or a cylindrical shape, for example, the convex section can be formed more easily and inexpensively.
- the hydrophilic unevenness region extends from the upstream side to the downstream side.
- the depth dimension of 6 is gradually increasing.
- the hydrophilic unevenness region 6 can be formed more easily and inexpensively as compared with the configuration in which the dimension in the depth direction continuously increases.
- the cost and time required to manufacture the stationary vane main body 21 can be reduced.
- the first embodiment of the present invention has been described above. It should be noted that various changes and modifications can be made to the above configuration without departing from the gist of the present invention.
- the hydrophilic uneven region 6 is divided into three regions, that is, the first region 61, the second region 62, and the third region 63 is described.
- the aspect of the hydrophilic uneven region 6 is not limited to the above, and it is also possible to adopt a configuration in which it is divided into four or more regions having different hydrophilicities.
- a water-repellent region 7 having water repellency is provided on the upstream side of the hydrophilic uneven region 6 described above.
- the term “shows water repellency” as used herein means that the contact angle formed by the droplets attached to the water repellent region 7 is 90 ° or more. That is, the droplet that has reached the water-repellent area 7 is repelled without reaching the water-repellent area 7 and reaches the hydrophilic unevenness area 6 on the downstream side.
- the droplets in the water-repellent region 7, before the droplets gather to form a larger liquid film, they ride on the flow of vapor and flow off to the downstream side. That is, the droplet can be made to flow to the downstream side in the state where the droplet is fine. As a result, it is possible to further suppress the formation of the liquid film due to the liquid droplets having a large particle size flowing to the downstream side.
- the state where the above-mentioned contact angle is 150 ° or more is called a super water-repellent state, and since the water-repellent function can be exhibited, the formation of the liquid film can be more effectively suppressed. ⁇ 02020/175192 14 ⁇ (: 171?2020/005867
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112020000950.5T DE112020000950B4 (de) | 2019-02-27 | 2020-02-14 | Turbinenleitschaufel und dampfturbine |
| KR1020217026334A KR102590708B1 (ko) | 2019-02-27 | 2020-02-14 | 터빈 정익 및 증기 터빈 |
| US17/433,331 US11719132B2 (en) | 2019-02-27 | 2020-02-14 | Turbine stator blade and steam turbine |
| CN202080015790.4A CN113474536B (zh) | 2019-02-27 | 2020-02-14 | 涡轮静叶片以及蒸汽轮机 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019033564A JP7179652B2 (ja) | 2019-02-27 | 2019-02-27 | タービン静翼、及び蒸気タービン |
| JP2019-033564 | 2019-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020175192A1 true WO2020175192A1 (ja) | 2020-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2020/005867 Ceased WO2020175192A1 (ja) | 2019-02-27 | 2020-02-14 | タービン静翼、及び蒸気タービン |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11719132B2 (ja) |
| JP (1) | JP7179652B2 (ja) |
| KR (1) | KR102590708B1 (ja) |
| CN (1) | CN113474536B (ja) |
| DE (1) | DE112020000950B4 (ja) |
| WO (1) | WO2020175192A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220154586A1 (en) * | 2019-02-27 | 2022-05-19 | Mitsubishi Power, Ltd. | Turbine stator blade and steam turbine |
| US11352908B1 (en) * | 2019-02-27 | 2022-06-07 | Mitsubishi Heavy Industries, Ltd. | Turbine stator blade and steam turbine |
| US20220381157A1 (en) * | 2019-12-11 | 2022-12-01 | Mitsubishi Heavy Industries, Ltd. | Turbine stator vane, turbine stator vane assembly, and steam turbine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230088458A (ko) * | 2021-06-28 | 2023-06-19 | 미츠비시 파워 가부시키가이샤 | 터빈 정익, 및 증기 터빈 |
| CN116378777A (zh) * | 2023-03-31 | 2023-07-04 | 西安热工研究院有限公司 | 一种使用阵列微结构预防汽轮机末级叶片水蚀的方法 |
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- 2020-02-14 CN CN202080015790.4A patent/CN113474536B/zh active Active
- 2020-02-14 DE DE112020000950.5T patent/DE112020000950B4/de active Active
- 2020-02-14 US US17/433,331 patent/US11719132B2/en active Active
- 2020-02-14 KR KR1020217026334A patent/KR102590708B1/ko active Active
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| US20220154586A1 (en) * | 2019-02-27 | 2022-05-19 | Mitsubishi Power, Ltd. | Turbine stator blade and steam turbine |
| US11352908B1 (en) * | 2019-02-27 | 2022-06-07 | Mitsubishi Heavy Industries, Ltd. | Turbine stator blade and steam turbine |
| US11719132B2 (en) * | 2019-02-27 | 2023-08-08 | Mitsubishi Heavy Industries, Ltd. | Turbine stator blade and steam turbine |
| US20220381157A1 (en) * | 2019-12-11 | 2022-12-01 | Mitsubishi Heavy Industries, Ltd. | Turbine stator vane, turbine stator vane assembly, and steam turbine |
| US11773753B2 (en) * | 2019-12-11 | 2023-10-03 | Mitsubishi Heavy Industries, Ltd. | Turbine stator vane, turbine stator vane assembly, and steam turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| US11719132B2 (en) | 2023-08-08 |
| DE112020000950T5 (de) | 2021-11-18 |
| JP2020139424A (ja) | 2020-09-03 |
| CN113474536B (zh) | 2023-01-06 |
| US20220154586A1 (en) | 2022-05-19 |
| KR20210114513A (ko) | 2021-09-23 |
| KR102590708B1 (ko) | 2023-10-17 |
| CN113474536A (zh) | 2021-10-01 |
| JP7179652B2 (ja) | 2022-11-29 |
| DE112020000950B4 (de) | 2025-12-31 |
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