US20110162735A1 - Flow guided steam strainer for steam turbine valves - Google Patents
Flow guided steam strainer for steam turbine valves Download PDFInfo
- Publication number
- US20110162735A1 US20110162735A1 US12/651,643 US65164310A US2011162735A1 US 20110162735 A1 US20110162735 A1 US 20110162735A1 US 65164310 A US65164310 A US 65164310A US 2011162735 A1 US2011162735 A1 US 2011162735A1
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- United States
- Prior art keywords
- strainer
- flow
- steam
- valve
- flow guide
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- 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.)
- Abandoned
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- 239000007787 solid Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- -1 oxide scale Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- 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
- F01D25/002—Cleaning of turbomachines
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- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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- 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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
- F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- 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
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- 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
- F05D2260/00—Function
- F05D2260/60—Fluid transfer
- F05D2260/607—Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles
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- 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
- Y10T137/00—Fluid handling
- Y10T137/794—With means for separating solid material from the fluid
-
- 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
- Y10T137/00—Fluid handling
- Y10T137/794—With means for separating solid material from the fluid
- Y10T137/8085—Hollow strainer, fluid inlet and outlet perpendicular to each other
Definitions
- the subject matter disclosed herein relates to steam turbines and, in particular, to a flow guided steam strainer for a steam turbine valve.
- a strainer is typically used to filter or block out the unwanted and potentially harmful particle impurities from the main steam flow.
- the strainer which is typically cylindrical in shape, is commonly located within the casing of a valve located in the steam turbine, for example a combined main stop and control valve or a reheat valve. The strainer is positioned within the valve casing such that the steam entering the valve at an inlet directly strikes a solid surface on a portion of the outer circumferential surface of the strainer.
- the solid surface portion of the strainer tends to stop or slow down the main steam flow.
- the steam then changes direction to circumferentially flow by the perforated or screen-like portion of the remainder of the outer circumferential surface of the strainer in an annular passage between the valve casing and the outer surface of the strainer.
- the solid surface portion of the strainer is better suited than the perforated portion of the strainer to stop foreign objects as they enter the valve without damaging or breaking the strainer material and possibly entering the valve where they could cause further damage.
- the steam flowing in the annular passage passes through the perforations or holes in the strainer where the steam enters the inside of the strainer and continues its flow downstream through the valve.
- the perforations or holes in the circumferential portion of the strainer other than at the location of the solid surface are typically sized to ensure that unwanted particles are screened out or otherwise prevented from entering the strainer with the main steam flow.
- a steam turbine valve includes a casing and an inlet in the casing through which a flow of steam flows into the valve.
- the valve also includes a strainer located in the casing, and a flow guide connected with the strainer to protrude out from the strainer at a location in which the flow of steam strikes the flow guide, changes direction in its flow with respect to the strainer and passes through a flow path of the strainer to an inside portion of the strainer.
- a valve for a steam turbine includes an inlet through which a flow of steam flows into the valve, and a strainer located within the valve, wherein at least a portion of the strainer includes a plurality of holes through which the steam flows.
- the valve also includes a flow guide connected with the strainer to protrude out from the strainer at a location in which the flow of steam strikes the flow guide and changes direction in its flow with respect to the strainer and passes through the holes in the first portion of the strainer to an inside portion of the strainer.
- a valve includes an inlet through which a flow of steam flows into the valve, and a cylindrical strainer located within the valve, wherein at least a first portion of the strainer includes a plurality of holes through which the steam flows.
- the valve also includes a flow guide connected with the strainer to protrude out from the strainer at a location in which the flow of steam strikes the flow guide and changes direction in its flow with respect to the strainer and passes through the holes in the first portion of the strainer to an inside portion of the strainer.
- FIG. 1 is a perspective view, partially transparent, of a steam valve having embodiments of the invention located therein;
- FIG. 2 is a more detailed perspective view, partially transparent, of a portion of the steam valve of FIG. 1 with a strainer according to an embodiment of the invention.
- FIG. 1 is a steam valve 10 that is part of a steam turbine.
- the steam valve 10 may be a combined main stop and control valve, a reheat valve or other type of steam turbine valve with various components therein (most not shown) to control and/or direct the flow of steam entering the valve 10 at an inlet 12 as indicated by the arrowhead 14 , then passing through the valve and out of an outlet 16 of the valve 10 as indicated by an arrowhead 18 and on to further components of the steam turbine.
- the strainer 20 located within a valve casing 22 .
- the strainer 20 may comprise one or more layers of material having a plurality of perforations or holes 24 in each layer, where the holes 24 may be the same size or of different size.
- the number of layers of material in which the holes 24 are formed is selected in an attempt to reduce the amount of pressure drop of the steam across the strainer 20 .
- the holes 24 are typically sized to prevent the anticipated unwanted particulate material (e.g., oxide scale, metal scraps, objects left behind in the steam turbine piping) from entering into the strainer with the rest of the main steam flow.
- the strainer 20 may be cylindrical in shape, although other shapes for the strainer 20 are contemplated by embodiments of the invention.
- the strainer 20 may have a hollow central portion 26 formed therein through which the main steam flow passes in a generally downward direction as seen in FIGS. 1 and 2 before exiting the strainer 20 at the bottom 28 of the strainer 20 and then continuing on to other parts of the steam valve 10 .
- FIGS. 1-2 show that the holes 24 are formed in the strainer 20 around a portion 30 of the circumferential outer periphery material of the strainer 20 .
- the holes 24 are formed through the entire thickness of the outer periphery material of the strainer 20 .
- the remaining portion 32 of the circumferential outer periphery material of the strainer 20 is a solid portion; that is, a portion 32 without any holes 24 formed therein. The angular amount of this solid portion 32 varies as needed for the application space.
- the solid portion 32 of the strainer 20 is disposed to face the main steam flow entering the steam valve 10 at the valve inlet 12 .
- the main steam flow strikes the solid portion 32 of the strainer 20 , which stops or slows down the main steam flow.
- the main steam flow then is diverted to flow in an annular passage that is located between the outside of the strainer 20 and the inside of the casing 22 . As it travels through the annular passage, the main steam flow passes through the holes 24 and into the central hollow portion 26 of the strainer 20 where it flows downward through the strainer and exits the strainer 20 at the bottom 28 .
- the solid portion 32 of the circumferential outer periphery material of the strainer 20 has a flow guide 38 formed integral therewith or attached or connected thereto by, e.g., welding or riveting.
- the flow guide 38 may form an inverted V-shape structure that protrudes out from the solid portion of the circumferential outer periphery material of the strainer 20 .
- the flow guide has an apex, along with its two outer surfaces 40 , are directed to point into the main steam flow entering the steam valve 10 at the valve inlet 12 .
- embodiments of the invention contemplate other shapes for the flow guide 38 besides the inverted V-shape (i.e., a triangular shape).
- the two outer surfaces 40 of the flow guide may be straight as shown, or may be curved in a convex or concave manner as desired to effectuate the proper aerodynamic flow of the main steam flow. As shown in FIGS. 1 and 2 , the flow guide 38 may span the entirety or a portion of the vertical distance of the solid portion 32 of the strainer 20 .
- the steam flow strikes the flow guide 38 .
- the flow guide 38 diverts the main steam flow into the annular passage in a relatively smoother aerodynamic manner than in the prior art discussed herein above where the main steam flow struck the solid portion 32 of the strainer 20 , thereby causing an undesirable pressure drop of the flow of steam across the strainer 20 along with attendant vibrations and noise.
- the relatively smoother aerodynamic flow of the main steam around the strainer 20 causes less pressure drop across the strainer 20 . It also causes a lesser amount of vibrations as well as noise.
- the smoother aerodynamic flow path provided by the flow guide 38 reduces or eliminates steam recirculation zones in the vicinity of the strainer 20 , while also reducing or eliminating viscous energy losses and pressure fluctuations.
- Embodiments of the invention provide for a relatively smoother flow of the input steam with respect to the strainer 20 within a steam valve 10 , thereby resulting in a reduced amount of pressure drop across the strainer 20 , and thus, the valve itself.
- the reduced pressure drop provides increased steam turbine efficiency.
- Embodiments of the invention also provide for reduced amounts of vibration and noise in the vicinity of the strainer.
Abstract
A steam turbine valve includes a casing and an inlet in the casing through which a flow of steam flows into the valve. The valve also includes a strainer located in the casing, and a flow guide connected with the strainer to protrude out from the strainer at a location in which the flow of steam strikes the flow guide, changes direction in its flow with respect to the strainer, and passes through a flow path of the strainer to an inside portion of the strainer.
Description
- The subject matter disclosed herein relates to steam turbines and, in particular, to a flow guided steam strainer for a steam turbine valve.
- In the operation of a steam turbine, oftentimes foreign objects in the form of solid particles of different sizes (e.g., oxide scale, metal scraps, objects left behind in the steam turbine piping) may enter the main steam path flowing from, for example, a boiler. A strainer is typically used to filter or block out the unwanted and potentially harmful particle impurities from the main steam flow. The strainer, which is typically cylindrical in shape, is commonly located within the casing of a valve located in the steam turbine, for example a combined main stop and control valve or a reheat valve. The strainer is positioned within the valve casing such that the steam entering the valve at an inlet directly strikes a solid surface on a portion of the outer circumferential surface of the strainer. The solid surface portion of the strainer tends to stop or slow down the main steam flow. The steam then changes direction to circumferentially flow by the perforated or screen-like portion of the remainder of the outer circumferential surface of the strainer in an annular passage between the valve casing and the outer surface of the strainer.
- Typically, the solid surface portion of the strainer is better suited than the perforated portion of the strainer to stop foreign objects as they enter the valve without damaging or breaking the strainer material and possibly entering the valve where they could cause further damage. The steam flowing in the annular passage passes through the perforations or holes in the strainer where the steam enters the inside of the strainer and continues its flow downstream through the valve. The perforations or holes in the circumferential portion of the strainer other than at the location of the solid surface are typically sized to ensure that unwanted particles are screened out or otherwise prevented from entering the strainer with the main steam flow.
- It is known that the steam striking the solid portion of the strainer causes an undesirable pressure drop of the flow of steam across the strainer along with attendant vibrations and noise. In other words, the aerodynamic flow path of the steam with respect to the strainer is far less than ideal, thereby possibly causing the aforementioned problems.
- According to one aspect of the invention, a steam turbine valve includes a casing and an inlet in the casing through which a flow of steam flows into the valve. The valve also includes a strainer located in the casing, and a flow guide connected with the strainer to protrude out from the strainer at a location in which the flow of steam strikes the flow guide, changes direction in its flow with respect to the strainer and passes through a flow path of the strainer to an inside portion of the strainer.
- According to another aspect of the invention, a valve for a steam turbine includes an inlet through which a flow of steam flows into the valve, and a strainer located within the valve, wherein at least a portion of the strainer includes a plurality of holes through which the steam flows. The valve also includes a flow guide connected with the strainer to protrude out from the strainer at a location in which the flow of steam strikes the flow guide and changes direction in its flow with respect to the strainer and passes through the holes in the first portion of the strainer to an inside portion of the strainer.
- According to yet another aspect of the invention, a valve includes an inlet through which a flow of steam flows into the valve, and a cylindrical strainer located within the valve, wherein at least a first portion of the strainer includes a plurality of holes through which the steam flows. The valve also includes a flow guide connected with the strainer to protrude out from the strainer at a location in which the flow of steam strikes the flow guide and changes direction in its flow with respect to the strainer and passes through the holes in the first portion of the strainer to an inside portion of the strainer.
- These and other advantages and features will become more apparent from the following description taken in conjunction with the drawings.
- The subject matter, which is regarded as the invention, is particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. The foregoing and other features and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
-
FIG. 1 is a perspective view, partially transparent, of a steam valve having embodiments of the invention located therein; and -
FIG. 2 is a more detailed perspective view, partially transparent, of a portion of the steam valve ofFIG. 1 with a strainer according to an embodiment of the invention. - The detailed description explains embodiments of the invention, together with advantages and features, by way of example with reference to the drawings.
- In
FIG. 1 is asteam valve 10 that is part of a steam turbine. For example, thesteam valve 10 may be a combined main stop and control valve, a reheat valve or other type of steam turbine valve with various components therein (most not shown) to control and/or direct the flow of steam entering thevalve 10 at aninlet 12 as indicated by thearrowhead 14, then passing through the valve and out of anoutlet 16 of thevalve 10 as indicated by anarrowhead 18 and on to further components of the steam turbine. - Shown in
FIG. 1 is astrainer 20 located within avalve casing 22. Thestrainer 20 may comprise one or more layers of material having a plurality of perforations orholes 24 in each layer, where theholes 24 may be the same size or of different size. Typically the number of layers of material in which theholes 24 are formed is selected in an attempt to reduce the amount of pressure drop of the steam across thestrainer 20. Theholes 24 are typically sized to prevent the anticipated unwanted particulate material (e.g., oxide scale, metal scraps, objects left behind in the steam turbine piping) from entering into the strainer with the rest of the main steam flow. - As seen in
FIGS. 1 and 2 , thestrainer 20 may be cylindrical in shape, although other shapes for thestrainer 20 are contemplated by embodiments of the invention. Thestrainer 20 may have a hollowcentral portion 26 formed therein through which the main steam flow passes in a generally downward direction as seen inFIGS. 1 and 2 before exiting thestrainer 20 at thebottom 28 of thestrainer 20 and then continuing on to other parts of thesteam valve 10. -
FIGS. 1-2 show that theholes 24 are formed in thestrainer 20 around aportion 30 of the circumferential outer periphery material of thestrainer 20. Theholes 24 are formed through the entire thickness of the outer periphery material of thestrainer 20. Theremaining portion 32 of the circumferential outer periphery material of thestrainer 20 is a solid portion; that is, aportion 32 without anyholes 24 formed therein. The angular amount of thissolid portion 32 varies as needed for the application space. Thesolid portion 32 of thestrainer 20 is disposed to face the main steam flow entering thesteam valve 10 at thevalve inlet 12. In prior art strainer designs discussed hereinabove, the main steam flow strikes thesolid portion 32 of thestrainer 20, which stops or slows down the main steam flow. The main steam flow then is diverted to flow in an annular passage that is located between the outside of thestrainer 20 and the inside of thecasing 22. As it travels through the annular passage, the main steam flow passes through theholes 24 and into the centralhollow portion 26 of thestrainer 20 where it flows downward through the strainer and exits thestrainer 20 at thebottom 28. - In accordance with embodiments of the invention, the
solid portion 32 of the circumferential outer periphery material of thestrainer 20 has aflow guide 38 formed integral therewith or attached or connected thereto by, e.g., welding or riveting. Theflow guide 38 may form an inverted V-shape structure that protrudes out from the solid portion of the circumferential outer periphery material of thestrainer 20. The flow guide has an apex, along with its twoouter surfaces 40, are directed to point into the main steam flow entering thesteam valve 10 at thevalve inlet 12. However, embodiments of the invention contemplate other shapes for theflow guide 38 besides the inverted V-shape (i.e., a triangular shape). The twoouter surfaces 40 of the flow guide may be straight as shown, or may be curved in a convex or concave manner as desired to effectuate the proper aerodynamic flow of the main steam flow. As shown inFIGS. 1 and 2 , theflow guide 38 may span the entirety or a portion of the vertical distance of thesolid portion 32 of thestrainer 20. - In operation, as the main steam flow enters the
steam valve 10 at theinlet 12 and travels towards thestrainer 20, the steam flow strikes theflow guide 38. Theflow guide 38 diverts the main steam flow into the annular passage in a relatively smoother aerodynamic manner than in the prior art discussed herein above where the main steam flow struck thesolid portion 32 of thestrainer 20, thereby causing an undesirable pressure drop of the flow of steam across thestrainer 20 along with attendant vibrations and noise. In embodiments of the invention, in contrast the relatively smoother aerodynamic flow of the main steam around thestrainer 20 causes less pressure drop across thestrainer 20. It also causes a lesser amount of vibrations as well as noise. The smoother aerodynamic flow path provided by theflow guide 38 reduces or eliminates steam recirculation zones in the vicinity of thestrainer 20, while also reducing or eliminating viscous energy losses and pressure fluctuations. - Embodiments of the invention provide for a relatively smoother flow of the input steam with respect to the
strainer 20 within asteam valve 10, thereby resulting in a reduced amount of pressure drop across thestrainer 20, and thus, the valve itself. The reduced pressure drop provides increased steam turbine efficiency. Embodiments of the invention also provide for reduced amounts of vibration and noise in the vicinity of the strainer. - While the invention has been described in detail in connection with only a limited number of embodiments, it should be readily understood that the invention is not limited to such disclosed embodiments. Rather, the invention can be modified to incorporate any number of variations, alterations, substitutions or equivalent arrangements not heretofore described, but which are commensurate with the spirit and scope of the invention. Additionally, while various embodiments of the invention have been described, it is to be understood that aspects of the invention may include only some of the described embodiments. Accordingly, the invention is not to be seen as limited by the foregoing description, but is only limited by the scope of the appended claims.
Claims (17)
1. A steam turbine valve, comprising:
a casing;
an inlet in the casing through which a flow of steam flows into the valve;
a strainer located in the casing; and
a flow guide connected with the strainer to protrude out from the strainer at a location in which the flow of steam strikes the flow guide, changes direction in its flow with respect to the strainer and passes through a flow path of the strainer to an inside portion of the strainer.
2. The steam turbine valve of claim 1 , wherein the strainer is cylindrical in shape.
3. The steam turbine valve of claim 1 , an annular passage being located between an outside of the strainer and an inside of the casing, wherein when the flow of steam strikes the flow guide the flow of steam changes direction and flows in the annular passage.
4. The steam turbine valve of claim 1 , wherein the strainer has a plurality of holes formed therein through which the flow of steam passes to an inside portion of the strainer.
5. The steam turbine valve of claim 1 , wherein the strainer has a first portion that includes a plurality of holes formed therein through which the flow of steam passes to an inside portion of the strainer, the strainer has a second portion that comprises a solid unapertured portion, the flow guide being connected with the solid portion of the strainer.
6. The steam turbine valve of claim 1 , wherein the flow guide comprises an inverted V-shape guide having an apex and a pair of facing surfaces at which the flow of steam strikes.
7. The steam turbine valve of claim 6 , wherein the pair of facing surfaces are one of straight, convex, or concave in shape.
8. A valve for a steam turbine, comprising:
an inlet through which a flow of steam flows into the valve;
a strainer located within the valve, wherein at least a portion of the strainer includes a plurality of holes through which the steam flows; and
a flow guide connected with the strainer to protrude out from the strainer at a location in which the flow of steam strikes the flow guide and changes direction in its flow with respect to the strainer and passes through the holes in the first portion of the strainer to an inside portion of the strainer.
9. The valve of claim 8 , wherein the strainer is cylindrical in shape.
10. The valve of claim 8 , wherein an annular passage is located outside of an outer surface of the strainer, wherein when the flow of steam strikes the flow guide the flow of steam changes direction and flows in the annular passage.
11. The valve of claim 8 , wherein the flow guide comprises an inverted V-shape guide having an apex and a pair of facing surfaces at which the flow of steam strikes.
12. The valve of claim 11 , wherein the pair of facing surfaces are one of straight, convex, or concave in shape.
13. A valve, comprising:
an inlet through which a flow of steam flows into the valve;
a cylindrical strainer located within the valve, wherein at least a first portion of the strainer includes a plurality of holes through which the steam flows; and
a flow guide connected with the strainer to protrude out from the strainer at a location in which the flow of steam strikes the flow guide and changes direction in its flow with respect to the strainer and passes through the holes in the first portion of the strainer to an inside portion of the strainer.
14. The valve of claim 13 , wherein the flow guide is connected with a unapertured second portion of the strainer.
15. The valve of claim 13 , wherein an annular passage is located outside of an outer surface of the strainer, wherein when the flow of steam strikes the flow guide the flow of steam changes direction and flows in the annular passage.
16. The valve of claim 13 , wherein the flow guide comprises an inverted V-shape, triangular guide having an apex and a pair of facing surfaces at which the flow of steam strikes and changes direction to flow in an annular passage that at least partially surrounds the strainer.
17. The valve of claim 16 , wherein the pair of facing surfaces are one of straight, convex, or concave in shape.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US12/651,643 US20110162735A1 (en) | 2010-01-04 | 2010-01-04 | Flow guided steam strainer for steam turbine valves |
EP20100196291 EP2354467A3 (en) | 2010-01-04 | 2010-12-21 | Flow guided steam strainer for steam turbine valves |
JP2010285234A JP2011137462A (en) | 2010-01-04 | 2010-12-22 | Flow guided steam strainer for steam turbine valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US12/651,643 US20110162735A1 (en) | 2010-01-04 | 2010-01-04 | Flow guided steam strainer for steam turbine valves |
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US20110162735A1 true US20110162735A1 (en) | 2011-07-07 |
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US12/651,643 Abandoned US20110162735A1 (en) | 2010-01-04 | 2010-01-04 | Flow guided steam strainer for steam turbine valves |
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US (1) | US20110162735A1 (en) |
EP (1) | EP2354467A3 (en) |
JP (1) | JP2011137462A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2018072895A1 (en) * | 2016-10-20 | 2018-04-26 | Siemens Aktiengesellschaft | Steam strainer and method for producing a steam strainer |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3459613A1 (en) * | 2017-09-22 | 2019-03-27 | Siemens Aktiengesellschaft | Steam filter for a steam turbine |
WO2020181617A1 (en) * | 2019-03-11 | 2020-09-17 | 杭州天铭科技股份有限公司 | Adjustment apparatus, adjuster, and shock absorber |
JP7458341B2 (en) | 2021-03-16 | 2024-03-29 | 株式会社東芝 | steam valves and steam turbines |
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US5870896A (en) * | 1997-11-05 | 1999-02-16 | General Electric Company | Combined valve configuration for steam cycle units |
US6070605A (en) * | 1999-01-25 | 2000-06-06 | General Electric Co. | Steam turbine valve disk vibration reducer |
US6655409B1 (en) * | 2002-09-04 | 2003-12-02 | General Electric Company | Combined stop and control valve for supplying steam |
US7284569B2 (en) * | 2004-10-04 | 2007-10-23 | Kabushiki Kaisha Toshiba | Steam valve |
US20090101859A1 (en) * | 2007-10-03 | 2009-04-23 | Kabushiki Kaisha Toshiba | Steam valve and generator set |
US20100116732A1 (en) * | 2008-11-07 | 2010-05-13 | Jung Chang-Moo | In-line strainer |
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JPS5632011A (en) * | 1979-08-24 | 1981-04-01 | Hitachi Ltd | Emergency shut-off valve for steam turbine |
JPS56171605U (en) * | 1980-05-21 | 1981-12-18 | ||
JPS5898404U (en) * | 1981-12-25 | 1983-07-04 | 株式会社日立製作所 | steam strainer |
JPS6148904U (en) * | 1984-08-30 | 1986-04-02 | ||
KR100733559B1 (en) * | 2002-10-29 | 2007-06-29 | 가부시끼가이샤 도시바 | Steam valve |
-
2010
- 2010-01-04 US US12/651,643 patent/US20110162735A1/en not_active Abandoned
- 2010-12-21 EP EP20100196291 patent/EP2354467A3/en not_active Withdrawn
- 2010-12-22 JP JP2010285234A patent/JP2011137462A/en not_active Withdrawn
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US4529518A (en) * | 1982-02-15 | 1985-07-16 | E. Beaudrey & Cie | Industrial water filter with stationary screen |
US5486088A (en) * | 1994-11-25 | 1996-01-23 | Brandon; Ronald E. | Steam turbine steam strainer |
US5575618A (en) * | 1994-11-25 | 1996-11-19 | Brandon; Ronald E. | Steam turbine steam strainer |
US5780896A (en) * | 1995-12-21 | 1998-07-14 | Nec Corporation | Semiconductor device having shallow impurity region without short-circuit between gate electrode and source and drain regions and process of fabrication thereof |
US5870896A (en) * | 1997-11-05 | 1999-02-16 | General Electric Company | Combined valve configuration for steam cycle units |
US6070605A (en) * | 1999-01-25 | 2000-06-06 | General Electric Co. | Steam turbine valve disk vibration reducer |
US6655409B1 (en) * | 2002-09-04 | 2003-12-02 | General Electric Company | Combined stop and control valve for supplying steam |
US7284569B2 (en) * | 2004-10-04 | 2007-10-23 | Kabushiki Kaisha Toshiba | Steam valve |
US20090101859A1 (en) * | 2007-10-03 | 2009-04-23 | Kabushiki Kaisha Toshiba | Steam valve and generator set |
US20100116732A1 (en) * | 2008-11-07 | 2010-05-13 | Jung Chang-Moo | In-line strainer |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018072895A1 (en) * | 2016-10-20 | 2018-04-26 | Siemens Aktiengesellschaft | Steam strainer and method for producing a steam strainer |
Also Published As
Publication number | Publication date |
---|---|
JP2011137462A (en) | 2011-07-14 |
EP2354467A3 (en) | 2013-12-25 |
EP2354467A2 (en) | 2011-08-10 |
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Owner name: GENERAL ELECTRIC COMPANY, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHOWDHURY, ABHISHEK;DONE, VAMSHIDHAR;SHAH, VISHAL;REEL/FRAME:023728/0603 Effective date: 20091030 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |