US20150139781A1 - Reaction turbine - Google Patents
Reaction turbine Download PDFInfo
- Publication number
- US20150139781A1 US20150139781A1 US14/399,573 US201314399573A US2015139781A1 US 20150139781 A1 US20150139781 A1 US 20150139781A1 US 201314399573 A US201314399573 A US 201314399573A US 2015139781 A1 US2015139781 A1 US 2015139781A1
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- United States
- Prior art keywords
- rotor
- flow path
- housing
- inner flow
- working fluid
- 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.)
- Abandoned
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- 239000012530 fluid Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims description 14
- 238000005266 casting Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 8
- 238000000926 separation method Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- -1 steam Substances 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
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/32—Non-positive-displacement machines or engines, e.g. steam turbines with pressure velocity transformation exclusively in rotor, e.g. the rotor rotating under the influence of jets issuing from the rotor, e.g. Heron 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
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/18—Non-positive-displacement machines or engines, e.g. steam turbines without stationary working-fluid guiding means
- F01D1/20—Non-positive-displacement machines or engines, e.g. steam turbines without stationary working-fluid guiding means traversed by the working-fluid substantially axially
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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
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/34—Non-positive-displacement machines or engines, e.g. steam turbines characterised by non-bladed rotor, e.g. with drilled holes
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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
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
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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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
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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
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
Definitions
- a steam turbine is one of motor techniques that convert thermal energy of steam into a mechanical work.
- the steam turbine jets and expands high-temperature and high-pressure steam generated in a boiler from nozzles or fixed wings, makes a high-speed steam flow collide with rotating turbine wings and rotates a turbine shaft by an impulse or rebound action.
- the steam turbine is configured of nozzles that convert the thermal energy of the steam into velocity energy and turbine wings that convert the velocity energy into a mechanical work.
- Examples of the steam turbine include an impulse turbine that drives the turbine wings using only an impulsive force and a rebound turbine or a reaction turbine that is driven by a rebound force.
- a reaction turbine including: a housing in which a housing inlet and a housing outlet are formed and a housing flow path that communicates the housing inlet and the housing outlet so that a high-pressure working fluid introduced into the housing inlet is capable of moving in a direction of the housing outlet; a rotation shaft that passes through the housing and is rotatably coupled to the housing; and a rotor that is integrally coupled to the rotation shaft within the housing flow path and rotates the rotation shaft as the working fluid introduced from a center side of the rotor in an axial direction is injected toward an outer circumference side of the rotor, wherein the rotor may include first and second rotor plates that are coupled to each other in the axial direction, and first and second flow paths may be formed on surfaces of the first and second rotor plates that face each other, respectively, and a combination of the first and second flow paths may constitute an inner flow path on which the working fluid is guided.
- a reaction turbine including: a housing in which a housing inlet and a housing outlet are formed and a housing flow path that communicates the housing inlet and the housing outlet so that a high-pressure working fluid introduced into the housing inlet is capable of moving in a direction of the housing outlet; a rotation shaft that passes through the housing and is rotatably coupled to the housing; and a rotor assembly that includes a plurality of rotors, which are stacked and disposed in a multi-stage manner along an axial direction within the housing flow path that are integrally coupled to the rotation shaft, and that rotate the rotation shaft as the working fluid introduced from a center of each of the plurality of rotors in the axial direction is injected toward an outer circumference side of each rotor, wherein the plurality of rotors may be integrally formed when two rotor plates are coupled to each other in the axial direction, and first and second flow paths of which cross sections are symmetrical with respect to each other, may be formed
- FIG. 8 is a cross-sectional view taken along a line D-D of FIG. 7 ;
- Separation plates 30 are respectively provided at both sides of four intermediate housings 11 , 12 , 13 , and 14 so as to form the housing flow path 10 c together with the intermediate housings 11 , 12 , 13 , and 14 .
- the separation plates 30 each have a disc shape, and through holes are formed in the middle of the separation plates 30 so that a first rotor plate 211 that will be described later can be rotatably inserted into the separation plates 30 through the through holes.
- a sealing member 40 for preventing leakage of steam is inserted between the separation plate 30 and the first rotor plate 211 .
- the sealing member 40 will be described in detail later.
- the sealing member 40 has a ring shape and is coupled to the separation plate 30 in the axial direction.
- the second rotor plate 212 has a disc shape, and the second boss portion 212 b is formed on an inner circumferential surface of the second rotor plate 212 so that the rotation shaft 20 can be coupled to the second rotor plate 212 .
- An outer circumferential surface of the second boss portion 212 b and an inner circumferential surface of the first boss portion 211 b constitute the rotor introduction portion 201 .
- a nozzle portion 303 having a smaller cross-sectional area than that of the inner flow path 302 is formed at a discharge side of the inner flow path 302 .
- a rotor according to the fourth embodiment of the present invention includes first and second rotor plates 511 and 512 .
- First and second flow paths 510 and 502 are formed on surfaces of the first and second rotor plates 511 and 512 that face each other, and the first and second flow paths 510 and 502 are combined with each other and constitute one inner flow path 520 that guides the working fluid.
- the rotor according to the fourth embodiment of the present invention is different from the above embodiments in that at least a part of the first and second flow paths 510 and 502 has an involute curve shape. The difference will be described in detail.
- shapes of the first and second flow paths 510 and 502 formed on the surfaces of the first and second rotor plates 511 and 512 that face each other, are similar, and thus, the second rotor plate 512 will be described.
- first and second flow paths 510 and 502 are symmetrical with respect to each other and constitute an arc shape (not the semicircular shape), or edges of the first and second flow paths 510 and 502 may be formed to be rounded so that the pressure loss of the working fluid can be reduced.
- each of the first and second flow paths 510 and 502 through which steam passes has an involute curve shape.
- a change in flow paths of the steam that is guided from the center to an outer circumferential side of the turbine and is injected in a circumferential direction is gentle so that the pressure loss can be reduced and performance of the turbine can be enhanced.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
A reaction turbine, according to the present invention, includes first and second rotor plates, which are coupled together to form an integrated rotor, and an inner flow path including a combination of first and second flow paths, which are formed on the surfaces of the first and second rotor plates that face each other, respectively, thereby enabling easier manufacturing into a form desired by a designer by eliminating the limitation of a cross-sectional shape of the inner flow path. In addition, a cross section of each of the first and second flow paths can be formed into a semicircular shape thus yielding a circular shape for the inner flow path, which is formed by combining the first and second flow paths, thereby effectively enhancing the performance of a turbine by minimizing pressure loss of a working fluid that passes through the inner flow path.
Description
- This application is a National Stage Patent Application of PCT International Patent Application No. PCT/KR2013/003264 filed on Apr. 18, 2013 under 35 U.S.C. §371, which claims priority to Korean Patent Application No. 10-2012-0049631 filed on May 10, 2012, which are all hereby incorporated by reference in their entirety.
- The present invention relates to a reaction turbine, and more particularly, to a reaction turbine that generates a rotational force using a repulsive force when a working fluid, such as steam, gas, or compressed air, is injected.
- In general, a steam turbine is one of motor techniques that convert thermal energy of steam into a mechanical work. The steam turbine jets and expands high-temperature and high-pressure steam generated in a boiler from nozzles or fixed wings, makes a high-speed steam flow collide with rotating turbine wings and rotates a turbine shaft by an impulse or rebound action. Thus, the steam turbine is configured of nozzles that convert the thermal energy of the steam into velocity energy and turbine wings that convert the velocity energy into a mechanical work. Examples of the steam turbine include an impulse turbine that drives the turbine wings using only an impulsive force and a rebound turbine or a reaction turbine that is driven by a rebound force.
- Korean Patent Registration No. 10-1052253 discloses a reaction turbine, wherein two or more injection rotation portions within a housing communicate with each other and are disposed along a radial direction in a multi-stage manner and rotate by reaction of an injection action of a fluid injected through an injection flow path of each injection rotation portion. However, when the capacity of the turbine is changed, it is difficult to share each component, such as the injection rotation portion.
- The present invention provides a reaction turbine in which components can be shared so that a turbine having various capacities can be manufactured and the performance of the turbine can be enhanced by minimizing pressure loss that may occur when a working fluid flows.
- According to an aspect of the present invention, there is provided a reaction turbine including: a housing in which a housing inlet and a housing outlet are formed and a housing flow path that communicates the housing inlet and the housing outlet so that a high-pressure working fluid introduced into the housing inlet is capable of moving in a direction of the housing outlet; a rotation shaft that passes through the housing and is rotatably coupled to the housing; and a rotor that is integrally coupled to the rotation shaft within the housing flow path and rotates the rotation shaft as the working fluid introduced from a center side of the rotor in an axial direction is injected toward an outer circumference side of the rotor, wherein the rotor may include first and second rotor plates that are coupled to each other in the axial direction, and first and second flow paths may be formed on surfaces of the first and second rotor plates that face each other, respectively, and a combination of the first and second flow paths may constitute an inner flow path on which the working fluid is guided.
- According to another aspect of the present invention, there is provided a reaction turbine including: a housing in which a housing inlet and a housing outlet are formed and a housing flow path that communicates the housing inlet and the housing outlet so that a high-pressure working fluid introduced into the housing inlet is capable of moving in a direction of the housing outlet; a rotation shaft that passes through the housing and is rotatably coupled to the housing; and a rotor that is integrally coupled to the rotation shaft within the housing flow path and rotates the rotation shaft as the working fluid introduced from a center side of the rotor in an axial direction is injected toward an outer circumference side of the rotor, wherein the rotor may include first and second rotor plates that are coupled to each other in the axial direction, and an inner flow path on which the working fluid is guided, may be formed on a surface of the second rotor plate toward the first rotor plate, and the first rotor plate may be formed to cover an entire surface of the inner flow path.
- According to still another aspect of the present invention, there is provided a reaction turbine including: a housing in which a housing inlet and a housing outlet are formed and a housing flow path that communicates the housing inlet and the housing outlet so that a high-pressure working fluid introduced into the housing inlet is capable of moving in a direction of the housing outlet; a rotation shaft that passes through the housing and is rotatably coupled to the housing; and a rotor assembly that includes a plurality of rotors, which are stacked and disposed in a multi-stage manner along an axial direction within the housing flow path that are integrally coupled to the rotation shaft, and that rotate the rotation shaft as the working fluid introduced from a center of each of the plurality of rotors in the axial direction is injected toward an outer circumference side of each rotor, wherein the plurality of rotors may be integrally formed when two rotor plates are coupled to each other in the axial direction, and first and second flow paths of which cross sections are symmetrical with respect to each other, may be formed on surfaces of the rotor plates that face each other, and a combination of the first and second flow paths may constitute one inner flow path.
- In a reaction turbine according to the present invention, first and second rotor plates are coupled together to form an integrated rotor, and an inner flow path including a combination of first and second flow paths, which are formed on the surfaces of the first and second rotor plates that face each other, respectively, thereby enabling easier manufacturing into a form desired by a designer by eliminating the limitation of a cross-sectional shape of the inner flow path. In addition, a cross section of each of the first and second flow paths can be formed into a semicircular shape thus yielding a circular shape for the inner flow path, which is formed by combining the first and second flow paths, thereby effectively enhancing the performance of a turbine by minimizing pressure loss of a working fluid that passes through the inner flow path.
- In addition, in the reaction turbine according to the present invention, when a rotor includes first and second rotor plates and an inner flow path is formed only on one rotor plate, a forming work and time of the inner flow path can be reduced. Also, the cross section of the inner flow path is formed into a semicircular shape so that pressure loss of the working fluid can be reduced.
- Also, the cross section of each of the first and second flow paths formed on the first and second rotor plates is formed into a semicircular shape, and the first and second flow paths each have an involute curve shape so that a change in flow paths of the working fluid is more gentle and pressure loss that occurs due to the change in flow paths can be minimized and thus the performance of the turbine can be enhanced.
- Furthermore, since a plurality of rotors are stacked in a multi-stage manner along an axial direction, the number of rotors can be increased or decreased according to the capacity of the turbine so that the turbine having various capacities can be manufactured, components can be shared and thus manufacturing costs can be reduced.
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FIG. 1 is a cross-sectional view of a reaction turbine according to a first embodiment of the present invention; -
FIG. 2 is an enlarged view of a portion A ofFIG. 1 ; -
FIG. 3 is a plan view of a first rotor plate illustrated inFIG. 1 ; -
FIG. 4 is a cross-sectional view taken along a line B-B ofFIG. 2 ; -
FIG. 5 is a cross-sectional view of a part of first and second rotor plates according to a second embodiment of the present invention; -
FIG. 6 is a cross-sectional view taken along a line C-C ofFIG. 5 ; -
FIG. 7 is a cross-sectional view of a part of first and second rotor plates according to a third embodiment of the present invention; -
FIG. 8 is a cross-sectional view taken along a line D-D ofFIG. 7 ; -
FIG. 9 is a plan view of a first rotor plate according to a fourth embodiment of the present invention; and -
FIG. 10 is a cross-sectional view taken along a line E-E ofFIG. 9 . - Hereinafter, a reaction turbine according to the present invention will be described in detail with reference to embodiments illustrated in the accompanying drawings.
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FIG. 1 is a cross-sectional view of a reaction turbine 1 according to a first embodiment of the present invention. - The reaction turbine 1 according to the present invention generates a rotational force using a working fluid including high-pressure steam or gas, or compressed air. The working fluid includes high-pressure steam or gas, or compressed air. Hereinafter, in the present embodiment, a case where the working fluid is steam, will be described.
- In the reaction turbine 1, a
rotation shaft 20 is rotatably coupled to ahousing 10, and at least one ormore rotors 200 are stacked on therotation shaft 20 along an axial direction. - The
housing 10 includes aninlet housing 15 in which ahousing inlet 10 a is formed so that high-pressure steam that is the working fluid may be introduced into theinlet housing 15, anoutlet housing 16 that is disposed at the other side of theinlet housing 15 and is spaced apart from theinlet housing 15 by a predetermined distance and has ahousing outlet 10 b through which expanded low-pressure steam is discharged in the air or is recirculated, andintermediate housings 11, 12, 13, and 14 that are disposed between theinlet housing 15 and theoutlet housing 16 and form a housing flow path 10 c on which therotors 200 can rotate. At least one ormore housing inlets 10 a may be provided, and in the present embodiment, onehousing inlet 10 a is formed. At least one ormore housing outlets 10 b may be provided, and in the present embodiment, onehousing outlet 10 b is formed. The number ofintermediate housings 11, 12, 13, and 14 that corresponds to the number ofrotors 200 may be provided. In the present embodiment, fourrotors 200 that will be described later are provided. Thus, fourintermediate housings 11, 12, 13, and 14 are provided along the axial direction. -
Separation plates 30 are respectively provided at both sides of fourintermediate housings 11, 12, 13, and 14 so as to form the housing flow path 10 c together with theintermediate housings 11, 12, 13, and 14. Theseparation plates 30 each have a disc shape, and through holes are formed in the middle of theseparation plates 30 so that afirst rotor plate 211 that will be described later can be rotatably inserted into theseparation plates 30 through the through holes. A sealingmember 40 for preventing leakage of steam is inserted between theseparation plate 30 and thefirst rotor plate 211. The sealingmember 40 will be described in detail later. The sealingmember 40 has a ring shape and is coupled to theseparation plate 30 in the axial direction. The sealingmember 40 is inserted into an inner circumferential surface of theseparation plate 30 in the axial direction and then is fixedly installed using a fastening member, such as a bolt. The sealingmember 40 is a Labyrinth seal having a shape in which a contact surface between thesealing member 40 and thefirst rotor plate 211 is minimized so that rotation of thefirst rotor plate 211 that will be described later can be easily performed. - A bearing module through which the
rotation shaft 20 that have passed through thehousing 10 passes, is installed in theinlet housing 15 and theoutlet housing 16, respectively, and abearing 21 that supports therotation shaft 20 is disposed in the bearing module. Also, amechanical seal 22 is disposed so as to prevent the working fluid in theinlet housing 15 and theoutlet housing 16 from leaking toward the bearing module. Also, a sealingmember 24 having a Labyrinth seal structure in which thesealing member 24 is installed between themechanical seal 22 and thebearing 21 and prevents the working fluid that leaks from themechanical seal 22 from being introducing into thebearing 21, is disposed in the bearing module. - The
rotor 200 is integrally coupled to therotation shaft 20 and rotates therotation shaft 20 as the steam introduced from a center side of therotor 200 in the axial direction is injected toward an outer circumference side of therotor 200. The capacity of the turbine may be changed according to the number ofrotors 200 coupled to therotation shaft 20. That is, when the capacity of the turbine is small, the number ofrotors 200 may be decreased, and when the capacity of the turbine is large, the number ofrotors 200 may be increased. - A plurality of
rotors 200 are stacked and disposed in a multi-stage manner along the axial direction within the housing flow path 10 c, and the steam injected from a rotor in the previous stage toward the outer circumference of each of therotors 200 is introduced into a center of a rear rotor through the housing flow path 10 c. In the present embodiment, therotor 200 includes four, i.e., first-stage, second-stage, third-stage, and four-stage rotors stage rotors - First and
second rotors stage rotors stage rotors second rotor plates first rotor plate 211 and thesecond rotor plate 212 of the first-stage rotor 210 will be described. -
FIG. 2 is an enlarged view of a portion A ofFIG. 1 .FIG. 3 is a plan view of a first rotor plate illustrated inFIG. 1 .FIG. 4 is a cross-sectional view taken along a line B-B ofFIG. 2 . - Referring to
FIGS. 2 through 4 , thefirst rotor plate 211 has a disc shape, and afirst boss portion 211 b is formed in the center of thefirst rotor plate 211 and protrudes toward thehousing inlet 10 a and constitutes arotor introduction portion 201 into which the steam that is the working fluid is introduced, together with asecond boss portion 212 b that will be described later. Afirst flow path 211 a is formed at a rear surface of thefirst rotor plate 211, i.e., at a surface that faces thesecond rotor plate 212. Since the shape of thefirst flow path 211 a corresponds to the shape of asecond flow path 212 a that will be described later, thesecond flow path 212 a will be described with reference toFIG. 3 . - A
first nozzle portion 211 c having a smaller cross-sectional area than that of a discharge side of thefirst flow path 211 a is formed at the discharge side of thefirst flow path 211 a. That is, referring toFIG. 2 , thefirst nozzle portion 211 c is formed as a groove having a smaller radius than that of thefirst flow path 211 a and thus increases flow velocity of the discharged fluid. Thefirst nozzle portion 211 c is limited to having the shape of the groove formed in thefirst rotor plate 211. However, embodiments of the present invention are not limited thereto, and additional nozzles each having a small radius part may be installed in thefirst nozzle portion 211 c. - The
first rotor plate 211 may be manufactured using a casting method, and thefirst flow path 211 a may be formed when a casting work is performed and may be finished using a ball end mill. Of course, embodiments of the present invention are not limited thereto, and thefirst flow path 211 a may be manufactured in any one of methods, whereby a groove may be formed in a surface from thefirst rotor plate 211 to thesecond rotor plate 212. Also, in the present embodiment, thefirst rotor plate 211 is finished using the ball end mill. However, embodiments of the present invention are not limited thereto, and thefirst rotor plate 211 may not be finished or may be finished using a different method. When thefirst nozzle portion 211 c is finished, a ball end mill having a smaller diameter than that of the ball end mill used to form thefirst flow path 211 a is used. - The
second rotor plate 212 has a disc shape, and thesecond boss portion 212 b is formed on an inner circumferential surface of thesecond rotor plate 212 so that therotation shaft 20 can be coupled to thesecond rotor plate 212. A shaft insertion hole 212 d into which therotation shaft 20 is inserted, is formed in thesecond boss portion 212 b, and a key hole 212 e into which a key of therotation shaft 20 is inserted, is formed in an inner circumferential surface of the shaft insertion hole 212 d. An outer circumferential surface of thesecond boss portion 212 b and an inner circumferential surface of thefirst boss portion 211 b constitute therotor introduction portion 201. Asecond flow path 212 a is formed on the entire surface from thesecond rotor plate 212 to thefirst rotor plate 211. Referring toFIG. 3 , thesecond flow path 212 a is formed to guide the working fluid introduced from therotor introduction portion 201 outwards. That is, thesecond flow path 212 a extends from an outer circumferential surface of therotor introduction portion 201 and is formed to be close to a circumferential direction from the outer circumferential surface of thesecond rotor plate 212. - A
second nozzle portion 212 c having a smaller cross-sectional area than that of a discharge side of thesecond flow path 212 a is formed at the discharge side of thesecond flow path 212 a. That is, thesecond nozzle portion 212 c is formed as a groove having a smaller radius than that of thesecond flow path 212 a and increases flow velocity of the discharged fluid. Thesecond nozzle portion 212 c is limited to having the shape of the groove formed in thesecond rotor plate 212. However, embodiments of the present invention are not limited thereto, and of course, additional nozzles each having a small radius part may be installed in thesecond nozzle portion 212 c. - The
second rotor plate 212 may be manufactured using a casting method, like in thefirst rotor plate 211. Thesecond flow path 212 a may be formed when a casting work is performed and may be finished using a ball end mill. Of course, embodiments of the present invention are not limited thereto, and thesecond flow path 212 a may be manufactured in any one of methods, whereby a groove may be formed in a surface from thesecond rotor plate 212 to thefirst rotor plate 211. Also, in the present embodiment, thesecond rotor plate 212 is finished using the ball end mill. However, embodiments of the present invention are not limited thereto, and thesecond rotor plate 212 may not be finished or may be finished using a different method. When thesecond nozzle portion 212 c is finished, a ball end mill having a smaller diameter than that of the ball end mill used to form thesecond flow path 212 a is used. - When the
first rotor plate 211 and thesecond rotor plate 212 are coupled to each other in the axial direction, thefirst flow path 211 a and thesecond flow path 212 a are symmetrical with respect to each other based on a surface on which the first andsecond rotor plates inner flow path 202. That is, thefirst flow path 211 a and thesecond flow path 212 a have cross sections that are symmetrical with respect to each other based on the surface on which the first andsecond rotor plates first flow path 211 a and thesecond flow path 212 a is formed into a semicircular shape. As the cross section of each of thefirst flow path 211 a and thesecond flow path 212 a is formed into the semicircular shape, when the first andsecond flow paths inner flow path 202 has a circular cross section. However, embodiments of the present invention are not limited thereto, and the cross-sectional shape of theinner flow path 202 is a circular shape, wherein the cross sections of the first andsecond flow paths second flow paths - The
rotor 210 having the above configuration includes first andsecond rotor plates second flow paths second rotor plates inner flow path 202. Thus, the cross-sectional shape of theinner flow path 202 may be a circular shape so that the pressure loss of the working fluid is minimized and performance of the turbine can be enhanced. - An operation of the reaction turbine having the above configuration according to an embodiment of the present invention will be described as below.
- When high-pressure steam generated in a boiler is supplied to the
housing inlet 10 a of thehousing 10 through a pipe, the steam is introduced into therotor introduction portion 201 of the first-stage rotor 210 in the axial direction. The steam introduced into therotor introduction portion 201 in the axial direction is distributed into a plurality ofinner flow paths 202. The distributed steam passes through the plurality ofinner flow paths 202, is moved toward an outer circumference side of the first-stage rotor 210, and is injected toward the housing flow path 10 c at high velocity along a circumferential direction of therotor 200. - The steam injected toward the outer circumference side of the first-
stage rotor 210 is introduced into the center of the second-stage rotor 220 disposed in the rear of the first-stage rotor 210, and the steam introduced into the second-stage rotor 220 passes through theinner flow paths 202 and is injected toward the outer circumference side of the second-stage rotor 220. The steam injected toward the outer circumference side of the second-stage rotor 220 is introduced into the center of the third-stage rotor 230, passes through theinner flow paths 202 and then is injected toward an outer circumference side of the third-stage rotor 230. The steam injected toward the outer circumference side of the third-stage rotor 230 is introduced into the center of the fourth-stage rotor 240, passes through theinner flow paths 202 and then is injected toward an outer circumference side of the fourth-stage rotor 240. The steam injected toward the outer circumference side of the fourth-stage rotor 240 is discharged to an outer portion of thehousing 10 through thehousing outlet 10 b. The steam discharged to the outer portion of thehousing 10 is discharged in the air or is recovered by a steam condenser (not shown) and then is circulated in the boiler. This operation is repeatedly performed. - The first-stage, second-stage, third-stage, and fourth-
stage rotors rotation shaft 20 to which the first-stage, second-stage, third-stage, and fourth-stage rotors rotation shaft 20 rotates together with the first-stage, second-stage, third-stage, and fourth-stage rotors - In the reaction turbine having the above-described configuration, cross sections of the
inner flow paths 202 through which the steam passes, have circular shapes. Thus, the pressure loss of the working fluid that passes through theinner flow paths 202 is reduced so that performance of the turbine can be enhanced. -
FIG. 5 is a cross-sectional view of a part of first and second rotor plates according to a second embodiment of the present invention.FIG. 6 is a cross-sectional view taken along a line C-C ofFIG. 5 . - A
rotor 310 according to the second embodiment of the present invention includes first andsecond rotor plates rotor 310 according to the second embodiment of the present invention is different from therotor 200 according to the first embodiment in thatinner flow paths 302 are formed only on a surface of asecond rotor plate 312 toward afirst rotor plate 311, and the difference will be described in detail. - The
first rotor plate 311 has a disc shape, and afirst boss portion 311 a is formed in the center of thefirst rotor plate 311, protrudes toward thehousing inlet 10 a and constitutes arotor introduction portion 201 into which steam that is the working fluid is introduced, together with asecond boss portion 312 a that will be described later. - The
second rotor plate 312 has a disc shape, and thesecond boss portion 312 a is formed on an inner circumferential surface of thesecond rotor plate 312 so that arotation shaft 20 can be coupled to thesecond rotor plate 312. An outer circumferential surface of thesecond boss portion 312 a and an inner circumferential surface of thefirst boss portion 311 a constitute arotor introduction portion 201. Theinner flow paths 302 are formed on a front surface of thesecond rotor plate 312 toward thefirst rotor plate 311. Theinner flow paths 302 may have various cross-sectional shapes. Thus, in the present embodiment, theinner flow paths 302 have rectangular cross-sectional shapes. Theinner flow paths 302 are formed in such a way that the surface toward thefirst rotor plate 311 is formed to be opened, and theinner flow paths 302 are covered by thefirst rotor plate 311. Thesecond rotor plate 312 is manufactured using a casting method, and theinner flow paths 302 are formed when a casting work is performed. Of course, embodiments of the present invention are not limited thereto, and theinner flow paths 302 may be manufactured in any one of methods, whereby a groove may be formed in a surface from thesecond rotor plate 312 to thefirst rotor plate 311. Also, in the present embodiment, theinner flow paths 302 are not separately finished. However, embodiments of the present invention are not limited thereto, and theinner flow paths 302 may be finished so that their edges may be rounded so that the pressure loss of the working fluid can be reduced. - A
nozzle portion 303 having a smaller cross-sectional area than that of theinner flow path 302 is formed at a discharge side of theinner flow path 302. - The
rotor 410 having the above configuration includes thesecond rotor plate 312 in which theinner flow paths 302 are formed, and thefirst rotor plate 311 that covers theinner flow paths 302. As therotor 310 includes first andsecond rotor plates inner flow paths 302 may be formed in various shapes. Theinner flow paths 302 are formed only on thesecond rotor plate 312 so that a structure of therotor 310 is simplified and a forming work and time can be reduced. -
FIG. 7 is a cross-sectional view of a part of first and second rotor plates according to a third embodiment of the present invention.FIG. 8 is a cross-sectional view taken along a line D-D ofFIG. 7 . - A
rotor 410 according to the third embodiment of the present invention includes first andsecond rotor plates rotor 410 according to the third embodiment of the present invention is different from thatrotor 310 according to the second embodiment of the present invention in thatinner flow paths 402 are formed only on a surface of thesecond rotor plate 412 toward thefirst rotor plate 411, wherein cross-sectional shapes of theinner flow paths 402 are semicircular shapes. The difference will be described in detail. - The
first rotor plate 411 has a disc shape, and afirst boss portion 411 a is formed in the middle of thefirst rotor plate 411 and protrudes toward ahousing inlet 10 a. Thefirst boss portion 411 a constitutes arotor introduction portion 201 into which steam that is a working fluid is introduced, together with asecond boss portion 312 a that will be described later. - The
second rotor plate 412 has a disc shape, and asecond boss portion 412 a is formed on an inner circumferential surface of thesecond rotor plate 412 so that arotation shaft 20 can be coupled to thesecond rotor plate 412. An outer circumferential surface of thesecond boss portion 412 a and an inner circumferential surface of thefirst boss portion 411 a constitute therotor introduction portion 201. Theinner flow paths 402 are formed on a front surface of thesecond rotor plate 412 toward thefirst rotor plate 411. Cross sections of theinner flow paths 402 may have various shapes. Thus, in the present embodiment, theinner flow paths 402 have semicircular cross sections. Thesecond rotor plate 412 may be manufactured using a casting method, and theinner flow paths 402 may be formed when a casting work is performed and may be finished using a ball end mill. Of course, embodiments of the present invention are not limited thereto, and theinner flow paths 402 may be manufactured in any one of methods, whereby a groove is formed in a surface from thesecond rotor plate 412 to the first rotor plate. Also, in the present embodiment, theinner flow paths 402 may be finished using the ball end mill. However, embodiments of the present invention are not limited thereto, and theinner flow paths 402 may not be finished and may also be finished using a different method. - A nozzle portion 403 having a smaller cross-sectional area than that of the
inner flow path 402 is formed at a discharge side of theinner flow path 402. The cross-sectional shape of the nozzle portion 403 may be a semicircular shape, and the nozzle portion 403 may be finished using a ball end mill having a smaller diameter than that of the ball end mill used to finish theinner flow path 402. - The
rotor 410 having the above configuration includes thesecond rotor plate 412 in which theinner flow paths 402 are formed, and thefirst rotor plate 411 that covers theinner flow paths 402. As therotor 410 includes the first andsecond rotor plates inner flow paths 402 may be formed in various shapes, and theinner flow paths 402 are formed only on thesecond rotor plate 412 so that a structure of therotor 410 is simplified and a forming work and time can be reduced. Also, as the cross section of theinner flow path 402 is formed into a semicircular shape, pressure loss of a working fluid can be reduced. -
FIG. 9 is a plan view of a first rotor plate according to a fourth embodiment of the present invention.FIG. 10 is a cross-sectional view taken along a line E-E ofFIG. 9 . - A rotor according to the fourth embodiment of the present invention includes first and
second rotor plates second flow paths second rotor plates second flow paths inner flow path 520 that guides the working fluid. The rotor according to the fourth embodiment of the present invention is different from the above embodiments in that at least a part of the first andsecond flow paths second flow paths second rotor plates second rotor plate 512 will be described. - As the
second flow path 502 formed at thesecond rotor plate 512 has an involute curve shape, a change in directions of flow paths is gentle so that a pressure drop of steam caused by the change in the directions of flow paths can be reduced. An outer circumferential surface of thesecond flow path 502 is connected to an outercircumferential surface 501 a of a circle that constitutes therotor introduction portion 501 so as to constitute at least one arc shape. A radius r2 of anarc 505 is greater than an inner diameter r1 of therotor introduction portion 501. Also, a radius of a basic circle of an involute curve that constitutes thesecond flow path 502 is set to be smaller than the inner diameter r1 of therotor introduction portion 501. - A
nozzle portion 503 having a smaller cross-sectional area than that of adischarge portion 502 b of thesecond flow path 502 is installed at thedischarge portion 502 b of thesecond flow path 502. Thenozzle portion 503 is disposed in an extension line of thesecond flow path 502, and thesecond flow path 502 and thenozzle portion 503 are placed in the same involute curve. Velocity energy and pressure energy of steam discharged by thenozzle portion 503 increase so that the steam can be injected at high velocity. However, embodiments of the present invention are not limited thereto, and additional nozzles each having a small radius may also be installed at thedischarge portion 502 b of thesecond flow path 502 using a fastening member. - The
second flow path 502 and thefirst flow path 510 have cross sections that are symmetrical with respect to each other based on a surface on which the first andsecond rotor plates - In the present embodiment, referring to
FIG. 10 , cross-sectional shapes of thefirst flow path 510 and thesecond flow path 502 are semicircular shapes. As the cross-sectional shapes of thefirst flow path 510 and thesecond flow path 502 are semicircular shapes, when the first andsecond flow paths inner flow path 520 has a circular cross section. However, embodiments of the present invention are not limited thereto, and the cross-sectional shape of theinner flow path 520 is a circular shape, wherein the cross sections of the first andsecond flow paths second flow paths second flow paths - In the reaction turbine having the above configuration, each of the first and
second flow paths - While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
- By using the present invention, a reaction turbine in which components can be shared so that a turbine having various capacities can be manufactured and pressure loss that occurs when a working fluid flows, is minimized so that performance of the turbine can be enhanced, can be manufactured.
Claims (17)
1. A reaction turbine comprising:
a housing in which a housing inlet and a housing outlet are formed and a housing flow path that communicates the housing inlet and the housing outlet so that a high-pressure working fluid introduced into the housing inlet is capable of moving in a direction of the housing outlet;
a rotation shaft that passes through the housing and is rotatably coupled to the housing; and
a rotor that is integrally coupled to the rotation shaft within the housing flow path and rotates the rotation shaft as the working fluid introduced from a center side of the rotor in an axial direction is injected toward an outer circumference side of the rotor,
wherein the rotor comprises first and second rotor plates that are coupled to each other in the axial direction, and
first and second flow paths are formed on surfaces of the first and second rotor plates that face each other, respectively, and
a combination of the first and second flow paths constitutes an inner flow path on which the working fluid is guided.
2. A reaction turbine comprising:
a housing in which a housing inlet and a housing outlet are formed and a housing flow path that communicates the housing inlet and the housing outlet so that a high-pressure working fluid introduced into the housing inlet is capable of moving in a direction of the housing outlet;
a rotation shaft that passes through the housing and is rotatably coupled to the housing; and
a rotor that is integrally coupled to the rotation shaft within the housing flow path and rotates the rotation shaft as the working fluid introduced from a center side of the rotor in an axial direction is injected toward an outer circumference side of the rotor,
wherein the rotor comprises first and second rotor plates that are coupled to each other in the axial direction, and
an inner flow path on which the working fluid is guided, is formed on a surface of the second rotor plate toward the first rotor plate, and
the first rotor plate is formed to cover an entire surface of the inner flow path.
3. The reaction turbine of claim 1 , wherein the first and second flow paths have cross sections that are symmetrical with respect to each other based on a surface on which the first and second rotor plates are coupled together.
4. The reaction turbine of claim 1 , wherein a cross section of each of the first and second flow paths is formed into a semicircular shape.
5. The reaction turbine of claim 1 , wherein a cross section of the inner flow path is formed into a circular shape.
6. The reaction turbine of claim 2 , wherein a cross section of the inner flow path is formed into a semicircular shape.
7. The reaction turbine of claim 1 , wherein the inner flow path is formed when the first and second rotor plates are manufactured using a casting method and is finished using a ball end mill.
8. The reaction turbine of claim 1 , further comprising a nozzle portion that extends from and is formed at a discharge side of the inner flow path and has a smaller cross-sectional area than that of the discharge side of the inner flow path.
9. The reaction turbine of claim 1 , wherein a plurality of rotors are stacked and disposed in a multi-stage manner along the axial direction within the housing flow path, and
the working fluid injected from a rotor in a previous stage toward the outer circumference side of the rotor is introduced toward the center side of a rotor in a next stage through the housing flow path.
10. The reaction turbine of claim 1 , wherein at least a part of the inner flow path has an involute curve shape.
11. The reaction turbine of claim 10 , wherein a rotor introduction portion into which the working fluid is introduced in the axial direction and which sends the introduced working fluid to the inner flow path, is formed in a center of the rotor, and
an outer circumferential surface of the rotor introduction portion and an outer circumferential surface of the inner flow path are connected to each other so as to constitute at least one arc shape.
12. A reaction turbine comprising:
a housing in which a housing inlet and a housing outlet are formed and a housing flow path that communicates the housing inlet and the housing outlet so that a high-pressure working fluid introduced into the housing inlet is capable of moving in a direction of the housing outlet;
a rotation shaft that passes through the housing and is rotatably coupled to the housing; and
a rotor assembly that comprises a plurality of rotors, which are stacked and disposed in a multi-stage manner along an axial direction within the housing flow path that are integrally coupled to the rotation shaft, and that rotate the rotation shaft as the working fluid introduced from a center of each of the plurality of rotors in the axial direction is injected toward an outer circumference side of each rotor,
wherein the plurality of rotors are integrally formed when two rotor plates are coupled to each other in the axial direction, and first and second flow paths of which cross sections are symmetrical with respect to each other, are formed on surfaces of the rotor plates that face each other, and a combination of the first and second flow paths constitutes one inner flow path.
13. The reaction turbine of claim 2 , wherein the inner flow path is formed when the first and second rotor plates are manufactured using a casting method and is finished using a ball end mill.
14. The reaction turbine of claim 2 , further comprising a nozzle portion that extends from and is formed at a discharge side of the inner flow path and has a smaller cross-sectional area than that of the discharge side of the inner flow path.
15. The reaction turbine of claim 2 , wherein a plurality of rotors are stacked and disposed in a multi-stage manner along the axial direction within the housing flow path, and
the working fluid injected from a rotor in a previous stage toward the outer circumference side of the rotor is introduced toward the center side of a rotor in a next stage through the housing flow path.
16. The reaction turbine of claim 2 , wherein at least a part of the inner flow path has an involute curve shape.
17. The reaction turbine of claim 16 , wherein a rotor introduction portion into which the working fluid is introduced in the axial direction and which sends the introduced working fluid to the inner flow path, is formed in a center of the rotor, and
an outer circumferential surface of the rotor introduction portion and an outer circumferential surface of the inner flow path are connected to each other so as to constitute at least one arc shape.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2012-0049631 | 2012-05-10 | ||
KR1020120049631A KR101589260B1 (en) | 2012-05-10 | 2012-05-10 | Reaction type turbine |
PCT/KR2013/003264 WO2013168904A1 (en) | 2012-05-10 | 2013-04-18 | Reaction turbine |
Publications (1)
Publication Number | Publication Date |
---|---|
US20150139781A1 true US20150139781A1 (en) | 2015-05-21 |
Family
ID=49550899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/399,573 Abandoned US20150139781A1 (en) | 2012-05-10 | 2013-04-18 | Reaction turbine |
Country Status (3)
Country | Link |
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US (1) | US20150139781A1 (en) |
KR (1) | KR101589260B1 (en) |
WO (1) | WO2013168904A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US599825A (en) * | 1898-03-01 | Rotary boiler-flue cleaner | ||
EP0035757A1 (en) * | 1980-03-08 | 1981-09-16 | Paul Dipl.-Ing. Morcov | Steam turbine |
US4466245A (en) * | 1983-06-02 | 1984-08-21 | Arold Frank G | Power plant having a fluid powered flywheel |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4178125A (en) * | 1977-10-19 | 1979-12-11 | Dauvergne Hector A | Bucket-less turbine wheel |
US4332520A (en) * | 1979-11-29 | 1982-06-01 | The United States Of America As Represented By The United States Department Of Energy | Velocity pump reaction turbine |
AUPM896094A0 (en) | 1994-10-24 | 1994-11-17 | Ward, Charles | Water turbine |
JP3837601B2 (en) * | 2002-03-11 | 2006-10-25 | 一郎 吉永 | Prime mover |
KR100905963B1 (en) * | 2007-03-27 | 2009-07-06 | 김기태 | Reaction type stem turbine |
KR20100131847A (en) * | 2009-06-08 | 2010-12-16 | 야이치로 모리구치 | Steam trubine |
KR101044395B1 (en) * | 2010-08-31 | 2011-06-27 | 주식회사 에이치케이터빈 | Steam turbine |
BR112013004852A2 (en) * | 2010-08-31 | 2016-06-07 | Hk Turbine Co Ltd | reaction type turbine |
-
2012
- 2012-05-10 KR KR1020120049631A patent/KR101589260B1/en not_active IP Right Cessation
-
2013
- 2013-04-18 WO PCT/KR2013/003264 patent/WO2013168904A1/en active Application Filing
- 2013-04-18 US US14/399,573 patent/US20150139781A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US599825A (en) * | 1898-03-01 | Rotary boiler-flue cleaner | ||
EP0035757A1 (en) * | 1980-03-08 | 1981-09-16 | Paul Dipl.-Ing. Morcov | Steam turbine |
US4466245A (en) * | 1983-06-02 | 1984-08-21 | Arold Frank G | Power plant having a fluid powered flywheel |
Non-Patent Citations (1)
Title |
---|
EP003575, Specification in English * |
Also Published As
Publication number | Publication date |
---|---|
KR101589260B1 (en) | 2016-01-28 |
KR20130125960A (en) | 2013-11-20 |
WO2013168904A1 (en) | 2013-11-14 |
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Owner name: HK TURBINE CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHANG, YOUNG IL;HAH, YONG SIK;KIM, JUNG HOON;AND OTHERS;SIGNING DATES FROM 20141014 TO 20141105;REEL/FRAME:034136/0962 |
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