WO2023136314A1 - シール装置及び回転機械 - Google Patents
シール装置及び回転機械 Download PDFInfo
- Publication number
- WO2023136314A1 WO2023136314A1 PCT/JP2023/000705 JP2023000705W WO2023136314A1 WO 2023136314 A1 WO2023136314 A1 WO 2023136314A1 JP 2023000705 W JP2023000705 W JP 2023000705W WO 2023136314 A1 WO2023136314 A1 WO 2023136314A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rib
- sealing device
- sealing
- base
- hole
- Prior art date
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 155
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 description 15
- 230000014509 gene expression Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 210000004907 gland Anatomy 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
-
- 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
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
- F01D11/14—Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/28—Arrangement of seals
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
Definitions
- the present disclosure relates to sealing devices and rotating machines.
- This application claims priority based on Japanese Patent Application No. 2022-005086 filed with the Japan Patent Office on January 17, 2022, the content of which is incorporated herein.
- Rotating machines such as gas turbines and steam turbines are equipped with sealing devices that reduce the amount of leakage of working fluid that flows from the high-pressure side to the low-pressure side around a rotor as a rotating member.
- Japanese Patent Laid-Open No. 2002-100000 discloses a seal member provided radially outwardly of a rotor so as to be movable in the radial direction, and a movable seal member having an elastic body that urges the seal member radially outwardly.
- a sealing device is disclosed.
- the seal member is urged radially outward by the elastic body when the rotating machine is started and stopped, and a sufficient seal gap is secured between the rotor and the movable seal member. be.
- the working fluid on the high pressure side (for example, working steam) wraps around the radially outer back surface of the seal member, thereby exerting back pressure on the seal member.
- This back pressure displaces the seal member radially inward against the biasing force of the elastic body.
- the seal member in the lower half of a gas turbine or steam turbine, the seal member must be displaced radially inward against the weight of the seal member and the biasing force of the elastic body during operation of the rotating machine. Therefore, in order to reliably displace the seal member radially inward during operation of the rotary machine, the biasing force of the elastic body must be relatively small. However, if the biasing force of the elastic body is too small, it becomes difficult to secure a seal gap between the rotor and the movable seal member when starting and stopping the rotating machine. Therefore, setting the biasing force of the elastic body tends to become more difficult as the radial dimension of the seal member increases.
- At least one embodiment of the present disclosure secures a seal gap between the rotating member and the sealing member when the rotating machine is started and stopped, and reduces the amount of leakage of working fluid when the rotating machine is in operation. It is an object of the present invention to provide a sealing device and rotary machine that can
- a sealing device a sealing member disposed between a rotating member of a rotating machine and a stationary member arranged radially outward of the rotating member with respect to the rotating member and sealing between the rotating member and the stationary member; a biasing member that biases the seal member radially outward; with
- the sealing member is a base extending in the circumferential direction of the rotating member; a rib extending in the circumferential direction and projecting radially outward from the base; a seal fin extending in the circumferential direction and protruding radially inward of the rotating member from the base; has The rib has a notch portion in which the biasing member is arranged between one end and the other end of the rib in the circumferential direction.
- a seal that can secure a sealing gap between a rotating member and a sealing member when starting and stopping a rotating machine, and can reduce the amount of leakage of working fluid when the rotating machine is in operation.
- Equipment and rotating machines can be provided.
- FIG. 1 is a diagram for explaining a steam turbine as an example of a rotating machine provided with seal devices according to some embodiments
- FIG. 2 is a schematic cross-sectional view of a casing body that constitutes the steam turbine of FIG. 1 as viewed in a cross section perpendicular to the axis of the rotor; It is a front view showing an example of whole composition of a sealing device concerning some embodiments. It is an enlarged view of the A section surrounded by the broken line of FIG. 3, and has shown about the 1st movable mechanism of a 1st sealing device. It is an enlarged view when a 1st movable mechanism is seen from a radial direction outer side.
- FIG. 9B is a cross-sectional view taken along the line BB in FIGS. 4A and 9A, showing the state at the time of start/stop of the steam turbine.
- FIG. 4B is a cross-sectional view taken along line CC in FIGS. 4A and 9A, showing a state at the time of start/stop of the steam turbine.
- FIG. 9B is a cross-sectional view taken along the line BB in FIGS. 4A and 9A, showing the state of the steam turbine during rated operation.
- FIG. 9B is a cross-sectional view taken along line CC in FIGS.
- FIG. 4A and 9A showing the state of the steam turbine during rated operation.
- FIG. 4B is a cross-sectional view taken along the line DD in FIG. 4A, showing the state of the steam turbine during rated operation.
- FIG. 4 is an enlarged view of the A portion surrounded by the dashed line in FIG. 3, showing the second movable mechanism of the second sealing device; It is an enlarged view when a 2nd movable mechanism is seen from a radial direction outer side. It is an exploded view of a second movable mechanism.
- FIG. 9C is a view showing only the second movable seal member in the second seal device shown in FIG. 9B;
- FIG. 9B is a cross-sectional view taken along the line EE in FIG. 9A, showing the state of the steam turbine during rated operation.
- expressions that express shapes such as squares and cylinders do not only represent shapes such as squares and cylinders in a geometrically strict sense, but also include irregularities and chamfers to the extent that the same effect can be obtained. Shapes including parts etc. shall also be represented.
- the expressions “comprising”, “comprising”, “having”, “including”, or “having” one component are not exclusive expressions excluding the presence of other components.
- FIG. 1 is a diagram for explaining a steam turbine as an example of a rotating machine provided with seal devices according to some embodiments.
- a steam turbine plant 10 includes a steam turbine 1 , a steam supply pipe 12 that supplies steam S as a working fluid from a steam supply source (not shown) to the steam turbine 1 , and downstream of the steam turbine 1 . and a steam exhaust pipe 13 connected to the side to exhaust steam.
- a steam turbine 1 includes a casing 2, a rotor body 11 rotating around an axis O within the casing 2, a rotor 3 connected to the rotor body 11, a rotor A bearing portion 4 that supports the main body 11 so as to be rotatable around the axis O is provided.
- the rotor 3 includes a rotor body 11 and turbine rotor blades 30 .
- the turbine rotor blades 30 each include a plurality of rotor blade bodies 31 attached so as to radially extend from the rotor body 11 , and a tip shroud 34 connected to the tip end portion of each of the plurality of rotor blade bodies 31 .
- the casing 2 is a substantially cylindrical member provided to cover the rotor 3 from the outer peripheral side.
- the casing 2 is provided with a plurality of stationary blade bodies 21 attached so as to extend radially inward toward the rotor body 11 .
- a plurality of stator vane main bodies 21 are arranged along the circumferential direction of the inner peripheral surface 25 and along the axis O direction.
- a hub shroud 23 is attached to each of the plurality of stator vane bodies 21 and connected to the distal end portion of each of the plurality of stator vane bodies 21 .
- the region in which the stationary blade main body 21 and the moving blade main body 31 are arranged forms a main flow path 20 through which the steam S, which is the working fluid, flows.
- FIG. 2 is a schematic cross-sectional view of a casing body that constitutes the steam turbine of FIG. 1 as viewed in a cross section perpendicular to the axis of the rotor.
- the radial direction centered on the axis O is also referred to as the radial direction of the rotary member or simply the radial direction.
- the circumferential direction centered on the axis O is also referred to as the circumferential direction of the rotating member or simply the circumferential direction
- the extending direction of the axis O is also referred to as the axial direction of the rotating member or simply the axial direction. called.
- the casing 2 includes a casing main body (vehicle chamber) 51 that defines the flow path of the steam S, and a ring-shaped blade ring 52 (see FIG. 2) fixed to the inner peripheral portion of the casing main body 51 . Further, the inner periphery of the blade ring 52 is provided with a sealing device 100 according to some embodiments.
- the casing body 51 is divided into an upper half portion 51A of the casing and a lower half portion 51B of the casing along a plane including the axis O of the rotor 3.
- Flange portions 55A and 55B projecting in the radial direction of the rotor 3 are formed in the upper half portion 51A of the casing and the lower half portion 51B of the casing, respectively, on the surfaces (partition surfaces 54A and 54B) that abut against each other. ing.
- the vehicle interior upper half portion 51A and the vehicle interior lower half portion 51B are fastened with bolts 9 at the flange portions 55A and 55B. 2 shows a cross section of the casing body 51 at an axial position where the turbine rotor blades 30 (see FIG. 1) are arranged radially inward, and the casing body 51 at this cross section position is It is formed in a cylindrical shape.
- the blade ring 52 is also divided into an upper blade ring half portion 52A and a blade ring lower half portion 52B along a plane including the axis O of the rotor 3.
- the blade ring upper half portion 52A is fixed to the cabin upper half portion 51A
- the blade ring lower half portion 52B is fixed to the cabin lower half portion 51B.
- the blade ring upper half portion 52A and the blade ring lower half portion 52B are connected to form the blade ring 52 by fastening and fixing the cabin upper half portion 51A and the cabin lower half portion 51B.
- the sealing device 100 is divided into an upper sealing device half portion 100U and a sealing device lower half portion 100L, similar to the casing main body 51 and the blade ring 52 .
- FIG. 3 is a front view showing an example of the overall configuration of the sealing device 100 according to some embodiments.
- a sealing device 100 includes a fixed seal member 110 and a movable seal member 110 provided annularly along a tip shroud 34 that continues to the tip of each of a plurality of rotor blade bodies 31 . It has a member 120 .
- the sealing device 100 are retained in circumferentially extending grooves 521 formed in the blade ring 52, as best shown in FIGS. 6A, 6B, 7A, and 7B below. , to seal the gap 50 between the tip shroud 34 and the blade ring 52 .
- the sealing device 100 according to some embodiments is applied to a sealing device provided between the blade ring 52 as a "stationary member" and the tip shroud 34 as a "rotating member" of the rotary machine.
- the sealing apparatus 100 may be used as seals for various rotating machines, including gland seals, vane tip seals, dummy annulus seals, and the like.
- the stationary seal member 110 includes a pair of an upper member 110A and a lower member 110B arranged on both left and right sides of the rotor body 11 in the drawing.
- the paired upper member 110A and lower member 110B meet at mating surfaces 112 .
- Seal fins are provided on the inner peripheral side of the stationary seal member 110 to suppress leakage of fluid (steam S in the case where the rotating machine is the steam turbine 1) between the stationary seal member 110 and the tip shroud 34.
- the stationary seal member 110 is elastically supported from the rear surface by a leaf spring or the like, and is configured to be able to escape radially outward when it comes into contact with the tip shroud 34. It does not move according to the operating state of the turbine 1 .
- the movable seal member 120 has a large gap 50 with the tip shroud 34 when the steam turbine 1 is started and stopped, and the mating surface 114 of the movable seal member 120 is attached to the fixed seal member 110 during rated operation of the steam turbine 1 .
- the gap 50 is narrowed by moving in the direction of the arrow in the figure so as to come into contact with each other.
- FIG. 4A is an enlarged view of a portion A surrounded by a dashed line in FIG. 3, and shows the first movable mechanism 150A of the first sealing device 100A, which is the sealing device 100 according to one embodiment.
- FIG. 4B is an enlarged view of the first movable mechanism 150A viewed from the radially outer side.
- FIG. 4C is an exploded view of the first movable mechanism 150A.
- FIG. 5 is a diagram showing only the first movable seal member 120A, which is the movable seal member 120 of the first seal device 100A, of the first seal device 100A shown in FIG. 4B.
- FIG. 6A is a cross-sectional view taken along the line BB in FIGS.
- FIG. 4A and 9A showing the state of the steam turbine 1 when starting and stopping.
- FIG. 6B is a cross-sectional view taken along line CC in FIGS. 4A and 9A, and shows the state of the steam turbine 1 when starting and stopping.
- FIG. 7A is a cross-sectional view taken along line BB in FIGS. 4A and 9A, and shows the state of the steam turbine 1 during rated operation.
- FIG. 7B is a cross-sectional view taken along line CC in FIGS. 4A and 9A, showing the state of the steam turbine 1 during rated operation.
- FIG. 8 is a cross-sectional view taken along the line DD in FIG. 4A and shows the state of the steam turbine 1 during rated operation.
- FIG. 9A is an enlarged view of a portion A surrounded by a dashed line in FIG. 3, and shows a second movable mechanism 150B of a second sealing device 100B, which is a sealing device 100 according to another embodiment.
- FIG. 9B is an enlarged view of the second movable mechanism 150B as seen from the radially outer side.
- FIG. 9C is an exploded view of the second movable mechanism 150B.
- FIG. 10 is a diagram showing only the second movable seal member 120B, which is the movable seal member 120 of the second seal device 100B, of the second seal device 100B shown in FIG. 9B.
- FIG. 11 is a cross-sectional view taken along line EE in FIG. 9A and shows the state of the steam turbine 1 during rated operation.
- the sealing device 100 when it is not necessary to distinguish between the first sealing device 100A according to one embodiment and the second sealing device 100B according to another embodiment, or when the first sealing device 100A according to one embodiment , and the second sealing device 100B according to another embodiment, the sealing device 100 is simply referred to. Similarly, in the following description, it is necessary to distinguish between the first movable mechanism 150A of the first sealing device 100A according to one embodiment and the second movable mechanism 150B of the second sealing device 100B according to another embodiment. When there is no movable mechanism, or when the first movable mechanism 150A of the first sealing device 100A according to one embodiment and the second movable mechanism 150B of the second sealing device 100B according to another embodiment are collectively referred to as the movable mechanism 150.
- first movable sealing member 120A of the first sealing device 100A according to one embodiment there is no particular need to distinguish between the first movable sealing member 120A of the first sealing device 100A according to one embodiment and the second movable sealing member 120B of the second sealing device 100B according to another embodiment.
- first movable seal member 120A of the first seal device 100A according to one embodiment and the second movable seal member 120B of the second seal device 100B according to another embodiment are collectively referred to as the movable seal Referred to as member 120 .
- Sealing apparatus 100 is positioned between tip shroud 34 and blade ring 52 located radially outwardly of tip shroud 34 to provide a gap between tip shroud 34 and blade ring 52 .
- a movable sealing member 120 is provided as a sealing member for sealing 50 .
- the sealing device 100 includes a spring 131 as a biasing member that biases the movable sealing member 120 radially outward.
- the sealing device 100 includes a pressure plate 133 that presses the spring 131 from the outside in the radial direction against the biasing force of the spring 131 .
- the sealing device 100 according to some embodiments includes a support plate 135 that supports the spring 131 from the radially inner side.
- a first sealing device 100A includes a first pressing plate 133A that presses the spring 131 from the radially outer side against the biasing force of the spring 131 .
- a second sealing device 100B includes a second presser plate 133B that presses the spring 131 from the outside in the radial direction against the biasing force of the spring 131 .
- the first pressing plate 133A of the first sealing device 100A according to one embodiment and the second pressing plate 133B of the second sealing device 100B according to another embodiment are collectively referred to simply as pressing plate 133. .
- the first movable mechanism 150A has a spring 131, a first pressing plate 133A, and a support plate 135.
- the second movable mechanism 150B has a spring 131, a second presser plate 133B, and a support plate 135.
- the presser plate 133 is arranged radially outward with respect to the movable seal member 120 and fixed to the movable seal member 120 by a plurality of bolts 191 as coupling members.
- the movable sealing member 120 is formed with a female screw portion 195 that is screwed with a male screw of a bolt 191 on a base portion 121 to be described later.
- a seal fin 122 is provided on the inner peripheral side of the movable seal member 120 to suppress leakage of the steam S between the movable seal member 120 and the tip shroud 34 .
- the spring 131, the pressing plate 133, and the support plate 135 are arranged in the groove 521 of the blade ring 52, as shown in FIGS. 6B, 7B, 8, and 11. provided inside.
- the grooves 521 of the blade ring 52 are formed in the inner periphery 52a of the blade ring 52 and extend in the circumferential direction.
- the groove portion 521 has an opening portion 522 that opens radially inward.
- the blade ring 52 has a pair of protrusions 523 protruding in the axial direction such that the axial dimension of the opening 522 is smaller than the axial dimension of the region of the groove 521 radially outside the opening 522 . is formed.
- the support plate 135 is in contact with the pair of projections 523 in the groove 521 from the radial outside. Therefore, the support plate 135 is restricted from moving radially inward within the groove 521 by the pair of protrusions 523 .
- the spring 131 biases the support plate 135 radially inward and biases the pressing plate 133 radially outward. Therefore, the movable seal member 120 to which the pressing plate 133 is fixed is biased by the spring 131 so that the gap between the seal fin 122 and the tip shroud 34 widens.
- the spring 131 may be, for example, a coil spring, and instead of the coil spring, any biasing member such as a disc spring, leaf spring, or metal bellows may be used.
- the radial dimension of the movable seal member 120 is larger than those of the gland seal, the stator vane tip seal, the dummy ring seal, and the like.
- the radial dimension of the movable seal member 120 increases, the weight of the seal member increases, so the biasing force of the spring 131 must be increased. Therefore, setting the biasing force of the spring 131 tends to become more difficult as the radial dimension of the movable seal member 120 increases. Therefore, in the sealing device 100 according to some embodiments, it is difficult to set the biasing force of the spring 131 compared to the gland seal, the stator blade tip seal, the dummy ring seal, and the like.
- the movable sealing member 120 resists its own weight and the biasing force of the spring 131 during rated operation of the steam turbine 1. should be displaced radially inward. Therefore, in order to reliably displace the movable seal member 120 radially inward during rated operation of the steam turbine 1, the biasing force of the spring 131 must be relatively small. However, if the biasing force of the spring 131 is excessively small, it becomes difficult to secure a gap between the seal fin 122 and the tip shroud 34 when the steam turbine 1 starts and stops. Therefore, setting the biasing force of the spring 131 tends to become more difficult as the radial dimension of the movable seal member 120 increases.
- the movable seal member 120 is configured as follows, so that the rigidity of the movable seal member 120 is secured and the dead weight of the movable seal member 120 is suppressed.
- the movable sealing member 120 has a base portion 121 extending in the circumferential direction.
- the movable seal member 120 has ribs 123 extending in the circumferential direction and protruding radially outward from the base portion 121 .
- Some embodiments of the sealing apparatus 100 include movable seals, for example, as shown in FIGS.
- the member 120 has sealing fins 122 extending in the circumferential direction and protruding radially inward from the base 121 .
- the ribs 123 are spring-loaded between one end of the ribs 123 in the circumferential direction, for example, as shown in FIGS. 4C, 5, 9C, and 10. It has a notch 125 in which 131 is arranged.
- the rigidity of the movable seal member 120 can be secured while suppressing the dead weight of the movable seal member 120.
- the steam turbine 1 when the steam turbine 1 is started and stopped, it becomes easier to secure a gap between the tip shroud 34 as a rotating member and the seal fin 122 , which is a seal gap between the tip shroud 34 and the movable seal member 120 .
- the amount of leakage of the steam S which is the working fluid, can be reduced.
- a steam turbine 1 includes a tip shroud 34 as a rotating member, a blade ring 52 as a stationary member, and a seal device 100 according to some embodiments.
- a tip shroud 34 as a rotating member
- a blade ring 52 as a stationary member
- a seal device 100 according to some embodiments.
- the distance L1 from the radially inner surface 121a of the base portion 121 to the radially outer end surface 123a of the rib 123 is the distance from the radially inner surface 121a of the base portion 121 to the radially inner surface 121a of the base portion 121.
- the distance L2 to the radially outer surface 121b is preferably three times or more.
- the radial length ((distance L1) ⁇ (distance L2)) of the rib 123 is compared with the radial thickness (distance L2) of the base 121. Since the area R becomes relatively large, the weight of the movable seal member 120 becomes relatively small. As a result, when the steam turbine 1 is started and stopped, it becomes easier to secure a gap between the tip shroud 34 as a rotating member and the seal fin 122 , which is a seal gap between the tip shroud 34 and the movable seal member 120 . During rated operation, the amount of leakage of the steam S, which is the working fluid, can be reduced.
- the base portion 121 is an insertion portion that is inserted through an opening portion 522 in a circumferentially extending groove portion 521 formed in an inner peripheral portion 52a of a blade ring 52 as a stationary member.
- 124 may be included.
- the dimension L3 of the rib 123 in the axial direction is preferably 0.3 times or less the dimension L4 of the insertion portion 124 in the axial direction.
- the sealing device 100 since the thickness (dimension L3) of the rib 123 is relatively small with respect to the axial dimension (dimension L4) of the base 121, the region R is relatively As a result, the weight of the movable seal member 120 becomes relatively small. As a result, when the steam turbine 1 is started and stopped, it becomes easier to secure a gap between the tip shroud 34 as a rotating member and the seal fin 122 , which is a seal gap between the tip shroud 34 and the movable seal member 120 . During rated operation, the amount of leakage of the steam S, which is the working fluid, can be reduced.
- the ribs 123 have a lower height (radial dimension) than other regions, or the ribs 123 do not exist in the region where the notch 125 exists. become. Therefore, the base portion 121 at the circumferential position where the cutout portion 125 exists is more likely to bend along a virtual plane extending in the radial direction than in other regions where the cutout portion 125 does not exist.
- the sealing device 100 includes, for example, a restricting member 160 which is a member different from the movable sealing member 120 and restricts deformation of the base 121 at the circumferential position where the notch 125 exists. Good. As a result, deformation of the base portion 121 at the circumferential position where the cutout portion 125 exists is restricted by the restriction member 160, so that the rigidity of the movable seal member 120 can be ensured even if the cutout portion 125 is provided.
- a restricting member 160 which is a member different from the movable sealing member 120 and restricts deformation of the base 121 at the circumferential position where the notch 125 exists. Good.
- the restricting member 160 may be a pressing plate 133 that presses the spring 131 from the outside in the radial direction against the biasing force of the spring 131 as a biasing member.
- the restriction member 160 does not have to be newly provided as a member separate from the pressing plate 133 , and the rigidity of the movable sealing member 120 can be ensured by the pressing plate 133 .
- the regulating member 160 may be fixed to the base portion on one side and the base portion 121 on the other side in the circumferential direction with the notch portion 125 sandwiched therebetween by a connecting member.
- the restricting member 160 extends in the circumferential direction with the notch 125 interposed therebetween. It is fixed to the base portion 121 by bolts 191 at a total of four points on one side and the other side of the axial direction with the rib 123 interposed therebetween.
- the restriction member 160 is provided with the notch 125 as shown in FIGS. It is fixed to the base 121 by a bolt 191 at one circumferential position. Thereby, the restricting member 160 can be stably fixed to the movable sealing member 120 .
- the restricting member 160 may extend from one axial side to the other axial side with the rib 123 interposed therebetween.
- the regulation members 160 exist on one side and the other side in the axial direction with the rib 123 interposed therebetween. can be done.
- the circumferential rigidity of the movable seal member 120 can be stably reinforced.
- the ribs 123 are formed by a first rib 141 on one side and a rib 141 on the other side in the circumferential direction with the notch 125 interposed therebetween, as shown in FIGS.
- a second rib 142 may be included.
- the regulating member 160 is preferably connected to the first rib 141 and the second rib 142 in a form described later. Accordingly, the restricting member 160 restricts the relative movement of the first rib 141 and the second rib 142, thereby suppressing the deformation of the base 121 at the circumferential position where the notch 125 exists. Thereby, the rigidity of the movable sealing member 120 can be ensured even if the notch portion 125 is provided.
- the first rib 141 has a A first through hole 143 may be provided.
- the second rib 142 is preferably provided with a second through hole 144 that penetrates the second rib 142 in the axial direction.
- the regulation member 160 has a third through hole 163 that penetrates the regulation member 160 in the axial direction.
- the first sealing device 100A includes at least two connecting pins 193 that connect the restricting member 160 to the first rib 141 and the second rib 142, as shown in FIGS. 4A and 4B, for example. good. At least one of the coupling pins 193 may be inserted into the first through hole 143 and the third through hole 163 , and at least another one of the coupling pins 193 may be inserted into the second through hole 144 and the fourth through hole 164 . should be inserted in Note that the illustration of the coupling pin 193 is omitted in the exploded view of FIG. 4C.
- the rigidity of the movable sealing member 120 can be relatively easily increased with a relatively simple configuration in which the restricting member 160 and the first rib 141 and the second rib 142 are connected by the connecting pin 193. can be secured to
- the restriction member 160 is provided with the third through holes 163 on one side and the other side in the axial direction with the first rib 141 interposed therebetween. It is preferable that fourth through holes 164 are provided on one side and the other side in the axial direction with the . That is, the restricting member 160 exists on one side and the other side in the axial direction with the first rib 141 and the second rib 142 interposed therebetween, and is located on one side in the axial direction with the first rib 141 and the second rib 142 interposed therebetween. It is preferable that the side and the other side are connected via a coupling pin 193 .
- the restricting members 160 exist on one side and the other side in the axial direction with the first rib 141 and the second rib 142 interposed therebetween. balanced reinforcement. Further, according to the first sealing device 100A according to one embodiment, the circumferential rigidity of the movable sealing member 120 can be stably reinforced.
- the first rib 141 has a first concave portion 145 that is concave radially inward. may be formed.
- the second rib 142 has a second recess 146 that is recessed radially inward. may be formed.
- a second sealing device 100B according to another embodiment for example, as shown in FIGS. 9A, 9C, 10, and 11
- the regulating member 160 includes a first projection 165 that fits into the first recess 145 and a second A second projection 166 that fits into the recess 146 may also be provided.
- the restricting member 160 and the first rib 141 and the second rib 142 are aligned by fitting the first protrusion 165 and the first recess 145 and fitting the second protrusion 166 and the second recess 146 together.
- the rigidity of the movable seal member 120 can be relatively easily ensured with a relatively simple configuration of coupling.
- the sealing device 100 is applied to the steam turbine 1 as an example of a rotating machine. etc., may be applied to other rotating machines.
- the seal device 100 includes a tip shroud 34 as a rotating member of a steam turbine 1 as a rotating machine, and a tip shroud 34 as a rotating member radially outward of the rotating member with respect to the tip shroud 34 as a rotating member.
- a movable seal member 120 which is a seal member disposed between the blade ring 52 as a stationary member arranged in the rim and seals between the rotating member (tip shroud 34) and the stationary member (blade ring 52); and a spring 131 as a biasing member that biases the member (movable seal member 120) radially outward.
- the seal member (movable seal member 120) includes a base portion 121 extending in the circumferential direction of the rotary member, ribs 123 extending in the circumferential direction and protruding radially outward from the base portion 121, and ribs 123 extending in the circumferential direction. and a seal fin 122 projecting radially inwardly of the rotating member from the base portion 121 .
- Rib 123 has a notch 125 in which a biasing member (spring 131) is arranged between one end and the other end of rib 123 in the circumferential direction.
- the rigidity of the seal member (movable seal member 120) is secured while the seal member (movable seal member 120) is can suppress its own weight.
- the rotating machine steam turbine 1
- the amount of leakage of steam S as working fluid can be reduced.
- the distance L1 from the radially inner surface 121a of the base 121 to the radially outer end surface 123a of the rib 123 is the radially inner side of the base 121. It is preferable that the distance L2 from the surface 121a to the radially outer surface 121b of the base portion 121 is three times or more.
- the configuration (2) above it is possible to provide regions R in which there is no portion constituting the seal member (movable seal member 120) on both sides of the rib 123 in the axial direction. Therefore, the dead weight of the seal member (movable seal member 120) can be reduced by this area R.
- the radial length ((distance L1) ⁇ (distance L2)) of the rib 123 is relatively large with respect to the radial thickness (distance L2) of the base portion 121. , the area R becomes relatively large, and the weight of the sealing member (movable sealing member 120) becomes relatively small.
- the base portion 121 includes a circumferentially extending groove portion 521 formed in the inner peripheral portion 52a of the stationary member (blade ring 52). It is preferable to include an insertion portion 124 that is inserted through the opening 522 in the .
- the dimension L3 of the rib 123 in the axial direction of the rotating member is preferably 0.3 times or less the dimension L4 of the insertion portion 124 in the axial direction.
- the configuration (3) above it is possible to provide regions R in which there is no portion constituting the seal member (movable seal member 120) on both sides of the rib 123 in the axial direction. Therefore, the dead weight of the seal member (movable seal member 120) can be reduced by this area R.
- the region R since the thickness (dimension L3) of the rib 123 is relatively small with respect to the axial dimension (dimension L4) of the base 121, the region R is relatively large, and the sealing The self-weight of the member (movable seal member 120) is comparatively small. As a result, when the rotating machine (steam turbine 1) is started and stopped, it becomes easier to secure a sealing gap between the rotating member (tip shroud 34) and the sealing member (movable sealing member 120). , the amount of leakage of the working fluid (steam S) can be reduced.
- a member different from the seal member (movable seal member 120) is provided in the circumferential direction where the notch 125 is present.
- a restricting member 160 that restricts deformation of the base 121 at a position may be provided.
- the height of the rib 123 is lower than that in other areas, or the rib 123 does not exist. Therefore, the base portion 121 at the circumferential position where the cutout portion 125 exists is more likely to bend along a virtual plane extending in the radial direction than in other regions where the cutout portion 125 does not exist. According to the above configuration (4), deformation of the base portion 121 at the circumferential position where the notch portion 125 exists is restricted by the restricting member 160. ) can be secured.
- the rib 123 includes a first rib 141 on one side in the circumferential direction and a second rib 142 on the other side with the notch 125 interposed therebetween. It's good to be
- the restricting member 160 is preferably connected to the first rib 141 and the second rib 142 .
- the restricting member 160 restricts the relative movement between the first rib 141 and the second rib 142, thereby preventing deformation of the base 121 at the circumferential position where the notch 125 exists. can be suppressed. Thereby, the rigidity of the seal member (movable seal member 120) can be ensured even if the notch portion 125 is provided.
- the first rib 141 may be provided with a first through hole 143 penetrating the first rib 141 in the axial direction of the rotating member.
- the second rib 142 is preferably provided with a second through hole 144 that penetrates the second rib 142 in the axial direction.
- the restricting member 160 has a third through hole 163 axially penetrating the restricting member 160 and a fourth through hole 164 axially penetrating the restricting member 160 at a position spaced apart from the third through hole 163 in the circumferential direction. and should be provided.
- the sealing device 100 preferably has at least two connecting pins 193 that connect the restricting member 160 with the first rib 141 and the second rib 142 . At least one of the coupling pins 193 may be inserted into the first through hole 143 and the third through hole 163 , and at least another one of the coupling pins 193 may be inserted into the second through hole 144 and the fourth through hole 164 . should be inserted in
- the rigidity of the sealing member (movable sealing member 120) can be compared with a relatively simple configuration in which the restricting member 160 and the first rib 141 and the second rib 142 are coupled by the coupling pin 193. can be easily secured.
- the regulating member 160 is provided with third through holes 163 on one side and the other side in the axial direction with the first rib 141 interposed therebetween, Further, fourth through holes 164 may be provided on one side and the other side in the axial direction with the second rib 142 interposed therebetween.
- the regulating members 160 are present on one side and the other side in the axial direction with the first rib 141 and the second rib 142 interposed therebetween, a relatively simple configuration can be used to maintain balance in the axial direction. It can be reinforced. Further, according to the configuration (7) above, it is possible to stably reinforce the circumferential rigidity of the seal member (movable seal member 120).
- the first rib 141 may be formed with a first recess 145 that is recessed radially inward.
- the second rib 142 may be formed with a second recess 146 that is recessed radially inward.
- the regulating member 160 may have a first protrusion 165 that fits into the first recess 145 and a second protrusion 166 that fits into the second recess 146 .
- the restricting member 160, the first rib 141 and the second rib 142 are fitted into the first protrusion 165 and the first recess 145, and the second protrusion 166 and the second protrusion 166 are fitted together.
- the rigidity of the seal member (movable seal member 120) can be relatively easily ensured with a relatively simple configuration of coupling by fitting with the recess 146.
- the regulating member 160 is provided on one side in the circumferential direction with the notch 125 sandwiched by the connecting member (bolt 191). It may be fixed to the base and the base 121 on the other side.
- the regulating member 160 can be stably fixed to the sealing member (movable sealing member 120).
- the regulating member 160 extends from one side to the other side in the axial direction of the rotating member with the rib 123 interposed therebetween. I hope you are.
- the regulating members 160 are present on one side and the other side in the axial direction with the rib 123 interposed therebetween, it is possible to achieve well-balanced reinforcement in the axial direction with a relatively simple configuration. Further, according to the configuration (10) above, it is possible to stably reinforce the circumferential rigidity of the seal member (movable seal member 120).
- the regulating member 160 is configured to resist the biasing force of the biasing member (spring 131). ) from the outside in the radial direction.
- a rotary machine includes a tip shroud 34 as a rotating member, a blade ring 52 as a stationary member, and a seal device having any one of the above configurations (1) to (11). 100 and.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
本願は、2022年1月17日に日本国特許庁に出願された特願2022-005086号に基づき優先権を主張し、その内容をここに援用する。
回転機械の回転部材と、前記回転部材に対して前記回転部材の径方向外側に配置された静止部材との間に配置され、前記回転部材と前記静止部材との間をシールするシール部材と、
前記シール部材を前記径方向外側に付勢する付勢部材と、
を備え、
前記シール部材は、
前記回転部材の周方向に延在する基部と、
前記周方向に延在し、前記基部から前記径方向外側に向かって突出するリブと、
前記周方向に延在し、前記基部から前記回転部材の径方向内側に向かって突出するシールフィンと、
を有し、
前記リブは、前記周方向における前記リブの一方端と他方端との間に前記付勢部材が配置される切欠き部を有する。
前記回転部材と、
前記静止部材と、
上記(1)の構成のシール装置と、
を備える。
例えば、「ある方向に」、「ある方向に沿って」、「平行」、「直交」、「中心」、「同心」或いは「同軸」等の相対的或いは絶対的な配置を表す表現は、厳密にそのような配置を表すのみならず、公差、若しくは、同じ機能が得られる程度の角度や距離をもって相対的に変位している状態も表すものとする。
例えば、「同一」、「等しい」及び「均質」等の物事が等しい状態であることを表す表現は、厳密に等しい状態を表すのみならず、公差、若しくは、同じ機能が得られる程度の差が存在している状態も表すものとする。
例えば、四角形状や円筒形状等の形状を表す表現は、幾何学的に厳密な意味での四角形状や円筒形状等の形状を表すのみならず、同じ効果が得られる範囲で、凹凸部や面取り部等を含む形状も表すものとする。
一方、一の構成要素を「備える」、「具える」、「具備する」、「含む」、又は、「有する」という表現は、他の構成要素の存在を除外する排他的な表現ではない。
図1は、幾つかの実施形態に係るシール装置を備える回転機械の一例としての蒸気タービンについて説明するための図である。
図1に示すように、蒸気タービンプラント10は、蒸気タービン1と、作動流体としての蒸気Sを蒸気供給源(不図示)から蒸気タービン1に供給する蒸気供給管12と、蒸気タービン1の下流側に接続されて蒸気を排出する蒸気排出管13とを備えている。
説明の便宜上、以下の説明では、軸線Oを中心とする径方向を回転部材の径方向、又は、単に径方向とも称する。同様に、以下の説明では、軸線Oを中心とする周方向を回転部材の周方向、又は、単に周方向とも称し、軸線Oの延在方向を回転部材の軸方向、又は、単に軸方向とも称する。
なお、図2に示す概略断面図は、径方向内側にタービン動翼30(図1参照)が配される軸方向位置におけるケーシング本体51の断面を示しており、この断面位置におけるケーシング本体51は円筒状に形成されている。
図3は、幾つかの実施形態に係るシール装置100の全体構成例を示す正面図である。図3に示すように、幾つかの実施形態に係るシール装置100は、複数の動翼本体31の各々の先端部に連なるチップシュラウド34に沿って環状に設けられた固定シール部材110及び可動シール部材120を有する。
なお、以降、回転機械の「静止部材」としての翼環52と、「回転部材」としてのチップシュラウド34との間に設けられたシール装置に幾つかの実施形態に係るシール装置100を適用する例について説明するが、幾つかの実施形態に係るシール装置100はグランドシール、静翼チップシール、ダミー環シール等を含む種々の回転機械用のシールとして使用可能である。
固定シール部材110は、背面から板ばね等で弾性的に支持されており、チップシュラウド34と接触したときに径方向外側に逃げ得るよう構成されているが、基本的には不動であり、蒸気タービン1の稼動状態に応じて移動するものではない。
図4Bは、第1可動機構150Aを径方向外側から見たときの拡大図である。
図4Cは、第1可動機構150Aの分解図である。
図5は、図4Bに示す第1シール装置100Aの内、第1シール装置100Aの可動シール部材120である第1可動シール部材120Aだけを表した図である。
図6Aは、図4A及び図9AにおけるB-B矢視断面図であり、蒸気タービン1の起動・停止時における状態を示している。
図6Bは、図4A及び図9AにおけるC-C矢視断面図であり、蒸気タービン1の起動・停止時における状態を示している。
図7Aは、図4A及び図9AにおけるB-B矢視断面図であり、蒸気タービン1の定格運転時における状態を示している。
図7Bは、図4A及び図9AにおけるC-C矢視断面図であり、蒸気タービン1の定格運転時における状態を示している。
図8は、図4AにおけるD-D矢視断面図であり、蒸気タービン1の定格運転時における状態を示している。
図9Bは、第2可動機構150Bを径方向外側から見たときの拡大図である。
図9Cは、第2可動機構150Bの分解図である。
図10は、図9Bに示す第2シール装置100Bの内、第2シール装置100Bの可動シール部材120である第2可動シール部材120Bだけを表した図である。
図11は、図9AにおけるE-E矢視断面図であり、蒸気タービン1の定格運転時における状態を示している。
同様に、以下の説明では、一実施形態に係る第1シール装置100Aの第1可動機構150Aと、他の実施形態に係る第2シール装置100Bの第2可動機構150Bとを特に区別する必要がない場合や、一実施形態に係る第1シール装置100Aの第1可動機構150Aと、他の実施形態に係る第2シール装置100Bの第2可動機構150Bとの総称として記載する場合、単に可動機構150と称する。
以下の説明では、一実施形態に係る第1シール装置100Aの第1可動シール部材120Aと、他の実施形態に係る第2シール装置100Bの第2可動シール部材120Bとを特に区別する必要がない場合や、一実施形態に係る第1シール装置100Aの第1可動シール部材120Aと、他の実施形態に係る第2シール装置100Bの第2可動シール部材120Bの総称として記載する場合、単に可動シール部材120と称する。
幾つかの実施形態に係るシール装置100は、可動シール部材120を径方向外側に付勢する付勢部材としてのばね131を備える。
幾つかの実施形態に係るシール装置100は、ばね131の付勢力に抗してばね131を径方向外側から押圧する押さえ板133を備える。
幾つかの実施形態に係るシール装置100は、ばね131を径方向内側から支持する支持板135を備える。
他の実施形態に係る第2シール装置100Bは、ばね131の付勢力に抗してばね131を径方向外側から押圧する第2押さえ板133Bを備える。
以下の説明では、一実施形態に係る第1シール装置100Aの第1押さえ板133Aと、他の実施形態に係る第2シール装置100Bの第2押さえ板133Bとを特に区別する必要がない場合や、一実施形態に係る第1シール装置100Aの第1押さえ板133Aと、他の実施形態に係る第2シール装置100Bの第2押さえ板133Bとの総称として記載する場合、単に押さえ板133と称する。
他の実施形態に係る第2シール装置100Bでは、第2可動機構150Bは、ばね131と、第2押さえ板133Bと、支持板135とを有する。
可動シール部材120の内周側にはシールフィン122が設けられており、可動シール部材120とチップシュラウド34との間を介した蒸気Sの漏れを抑制している。
幾つかの実施形態では、翼環52の溝部521は、翼環52の内周部52aに形成されていて、周方向に延在する。溝部521は、径方向内側で開口した開口部522を有する。
翼環52には、開口部522の軸方向の寸法が、溝部521における開口部522よりも径方向外側の領域の軸方向の寸法よりも小さくなるように軸方向に突出する一対の突部523が形成されている。
そのため、押さえ板133が固定されている可動シール部材120は、シールフィン122とチップシュラウド34との間隙が広がるように、ばね131によって付勢されることとなる。
なお、ばね131は例えばコイルばねであってもよく、コイルばねに代えて、皿ばね、板ばね、金属ベローズ等の任意の付勢部材を用いてもよい。
蒸気タービン1の起動・停止時には、溝部521内に蒸気Sが導入されておらず、又は、導入されたとしても溝部521内の圧力が比較的低い。そのため、図6A及び図6Bに示すように、幾つかの実施形態に係るシール装置100では、可動シール部材120は、ばね131の付勢力によって径方向外側に移動するので、シールフィン122とチップシュラウド34との間隙が広がる。
蒸気タービン1の定格運転時には、溝部521内に比較的高圧の蒸気Sが導入され、溝部521内の圧力が比較的高くなる。そのため、図7A及び図7Bに示すように、幾つかの実施形態に係るシール装置100では、可動シール部材120は、溝部521内の蒸気Sの圧力によってばね131の付勢力に抗して径方向外側に移動するので、シールフィン122とチップシュラウド34との間隙が狭まる。
幾つかの実施形態に係るシール装置100のシール装置上半部100Uでは、可動シール部材120の自重に抗してばね131の付勢力によって可動シール部材120を鉛直上方に移動させる必要がある。そのため、蒸気タービン1の起動・停止時にシールフィン122とチップシュラウド34との間隙を確実に確保するためには、ばね131の付勢力は適度に大きくなければならない。しかし、ばね131の付勢力が過度に大きいと、蒸気タービン1の定格運転時に可動シール部材120を径方向内側に変位させることが困難となる。
幾つかの実施形態に係るシール装置100では、例えば図4A、図4B、図4C、図5、図6A、図6B、図7A、図7B、図8、図9A、図9B、図9C、図10、及び図11に示すように、可動シール部材120は、周方向に延在し、基部121から径方向外側に向かって突出するリブ123を有する。
幾つかの実施形態に係るシール装置100では、例えば図4A、図4C、図6A、図6B、図7A、図7B、図8、図9A、図9C、及び図11に示すように、可動シール部材120は、周方向に延在し、基部121から径方向内側に向かって突出するシールフィン122を有する。
幾つかの実施形態に係るシール装置100では、例えば図4C、図5、図9C、及び図10に示すように、リブ123は、周方向におけるリブ123の一方端と他方端との間にばね131が配置される切欠き部125を有する。
これにより、蒸気タービン1の起動・停止時には回転部材としてのチップシュラウド34と可動シール部材120との間のシール間隙であるチップシュラウド34とシールフィン122との間隙を確保し易くなり、蒸気タービン1の定格運転時には作動流体である蒸気Sの漏れ量を少なくすることができる。
これにより、リブ123を挟んだ軸方向の両側に可動シール部材120を構成する部位が存在しない領域Rを設けることができる。そのため、この領域の分だけ、可動シール部材120の自重を小さくすることができる。幾つかの実施形態に係るシール装置100によれば、基部121の径方向の厚さ(距離L2)に対してリブ123の径方向の長さ((距離L1)-(距離L2))が比較的大きくなるので、上記領域Rが比較的大きくなり、可動シール部材120の自重が比較的小さくなる。これにより、蒸気タービン1の起動・停止時には回転部材としてのチップシュラウド34と可動シール部材120との間のシール間隙であるチップシュラウド34とシールフィン122との間隙を確保し易くなり、蒸気タービン1の定格運転時には作動流体である蒸気Sの漏れ量を少なくすることができる。
これにより、リブ123を挟んだ軸方向の両側に可動シール部材120を構成する部位が存在しない領域Rを設けることができる。そのため、この領域Rの分だけ、可動シール部材120の自重を小さくすることができる。幾つかの実施形態に係るシール装置100によれば、基部121の軸方向の寸法(寸法L4)に対してリブ123の厚さ(寸法L3)が比較的小さくなるので、上記領域Rが比較的大きくなり、可動シール部材120の自重が比較底小さくなる。これにより、蒸気タービン1の起動・停止時には回転部材としてのチップシュラウド34と可動シール部材120との間のシール間隙であるチップシュラウド34とシールフィン122との間隙を確保し易くなり、蒸気タービン1の定格運転時には作動流体である蒸気Sの漏れ量を少なくすることができる。
幾つかの実施形態に係るシール装置100では、切欠き部125が存在する領域では、他の領域と比べてリブ123の高さ(径方向の寸法)が低い、又は、リブ123が存在しないことになる。そのため、切欠き部125が存在する周方向位置における基部121は、切欠き部125が存在しない他の領域に比べて径方向に延在する仮想的な面に沿って曲がるように変形し易い。
これにより、切欠き部125が存在する周方向位置における基部121の変形が規制部材160によって規制されるので、切欠き部125を設けても可動シール部材120の剛性を確保できる。
これにより、規制部材160を押さえ板133とは別の部材として新たに設けなくてもよく、押さえ板133によって可動シール部材120の剛性を確保できる。
これにより、規制部材160を可動シール部材120に安定的に固定できる。
幾つかの実施形態に係るシール装置100では、リブ123を挟んで軸方向の一方側と他方側とに規制部材160が存在することで、比較的簡素な構成で軸方向にバランスの取れた補強ができる。また、幾つかの実施形態に係るシール装置100では、可動シール部材120の周方向の剛性も安定して補強できる。
幾つかの実施形態に係るシール装置100では、例えば図4C、及び図9Cによく示すように、リブ123は、切欠き部125を挟んだ周方向の一方側の第1リブ141と他方側の第2リブ142とを含んでいるとよい。規制部材160は、第1リブ141と第2リブ142とに後述するような形態で結合されているとよい。
これにより、規制部材160が第1リブ141と第2リブ142との相対的な移動を規制することで、切欠き部125が存在する周方向位置における基部121の変形を抑制できる。これにより、切欠き部125を設けても可動シール部材120の剛性を確保できる。
一実施形態に係る第1シール装置100Aでは、例えば図4A、図4B、図4C、図5、及び図8に示すように、第1リブ141には、軸方向に第1リブ141を貫通する第1貫通孔143が設けられているとよい。第2リブ142には、軸方向に第2リブ142を貫通する第2貫通孔144が設けられているとよい。
一実施形態に係る第1シール装置100Aでは、例えば図4A、図4B、図4C、及び図8に示すように、規制部材160には、軸方向に規制部材160を貫通する第3貫通孔163と、第3貫通孔163とは周方向に離間した位置で軸方向に規制部材を貫通する第4貫通孔164とが設けられているとよい。
一実施形態に係る第1シール装置100Aは、例えば図4A、及び図4Bに示すように、規制部材160と第1リブ141及び第2リブ142とを結合する少なくとも2つの結合ピン193を備えるとよい。結合ピン193の少なくとも1つは、第1貫通孔143と第3貫通孔163に挿入されているとよく、結合ピン193の少なくとも他の1つは、第2貫通孔144と第4貫通孔164に挿入されるとよい。
なお、図4Cの分解図では、結合ピン193の記載を省略している。
一実施形態に係る第1シール装置100Aでは、第1リブ141及び第2リブ142を挟んで軸方向の一方側と他方側とに規制部材160が存在するので、比較的簡素な構成で軸方向にバランスの取れた補強ができる。また、一実施形態に係る第1シール装置100Aによれば、可動シール部材120の周方向の剛性も安定して補強できる。
他の実施形態に係る第2シール装置100Bでは、例えば図9A、図9C、図10、及び図11に示すように、第1リブ141は、径方向内側に向かって凹んだ第1凹部145が形成されていてもよい。他の実施形態に係る第2シール装置100Bでは、例えば図9A、図9C、図10、及び図11に示すように、第2リブ142は、径方向内側に向かって凹んだ第2凹部146が形成されていてもよい。他の実施形態に係る第2シール装置100Bでは、例えば図9A、図9C、及び図11に示すように、規制部材160は、第1凹部145に嵌合する第1突部165と、第2凹部146に嵌合する第2突部166とを有していてもよい。
これにより、規制部材160と第1リブ141及び第2リブ142とを第1突部165と第1凹部145との嵌合、及び、第2突部166と第2凹部146との嵌合により結合するという比較的簡素な構成で可動シール部材120の剛性を比較的容易に確保できる。
例えば、上述の説明では、幾つかの実施形態に係るシール装置100を回転機械の一例として蒸気タービン1に適用した場合について説明したが、幾つかの実施形態に係るシール装置100は、例えばガスタービン等、その他の回転機械に適用してもよい。
(1)本開示の少なくとも一実施形態に係るシール装置100は、回転機械としての蒸気タービン1の回転部材としてのチップシュラウド34と、回転部材としてのチップシュラウド34に対して回転部材の径方向外側に配置された静止部材としての翼環52との間に配置され、回転部材(チップシュラウド34)と静止部材(翼環52)との間をシールするシール部材である可動シール部材120と、シール部材(可動シール部材120)を径方向外側に付勢する付勢部材としてのばね131と、を備える。シール部材(可動シール部材120)は、回転部材の周方向に延在する基部121と、周方向に延在し、基部121から径方向外側に向かって突出するリブ123と、周方向に延在し、基部121から回転部材の径方向内側に向かって突出するシールフィン122と、を有する。リブ123は、周方向におけるリブ123の一方端と他方端との間に付勢部材(ばね131)が配置される切欠き部125を有する。
上記(4)の構成によれば、切欠き部125が存在する周方向位置における基部121の変形が規制部材160によって規制されるので、切欠き部125を設けてもシール部材(可動シール部材120)の剛性を確保できる。
34 チップシュラウド
52 翼環
52a 内周部
100 シール装置
120 可動シール部材
121 基部
121a 面
121b 面
122 シールフィン
123 リブ
123a 端面
124 挿通部
125 切欠き部
131 ばね
141 第1リブ
142 第2リブ
143 第1貫通孔
144 第2貫通孔
145 第1凹部
146 第2凹部
160 規制部材
163 第3貫通孔
164 第4貫通孔
165 第1突部
166 第2突部
191 ボルト
193 結合ピン
521 溝部
522 開口部
Claims (12)
- 回転機械の回転部材と、前記回転部材に対して前記回転部材の径方向外側に配置された静止部材との間に配置され、前記回転部材と前記静止部材との間をシールするシール部材と、
前記シール部材を前記径方向外側に付勢する付勢部材と、
を備え、
前記シール部材は、
前記回転部材の周方向に延在する基部と、
前記周方向に延在し、前記基部から前記径方向外側に向かって突出するリブと、
前記周方向に延在し、前記基部から前記回転部材の径方向内側に向かって突出するシールフィンと、
を有し、
前記リブは、前記周方向における前記リブの一方端と他方端との間に前記付勢部材が配置される切欠き部を有する
シール装置。 - 前記基部の前記径方向内側の面から前記リブの前記径方向外側の端面までの距離は、前記基部の前記径方向内側の面から前記基部の前記径方向外側の面までの距離の3倍以上である
請求項1に記載のシール装置。 - 前記基部は、前記静止部材の内周部に形成された前記周方向に延在する溝部における開口部に挿通される挿通部を含み、
前記回転部材の軸方向の前記リブの寸法は、前記軸方向の前記挿通部の寸法の0.3倍以下である、
請求項1又は2に記載のシール装置。 - 前記シール部材とは異なる部材であって、前記切欠き部が存在する周方向位置における前記基部の変形を規制する規制部材、
を備える
請求項1又は2に記載のシール装置。 - 前記リブは、前記切欠き部を挟んだ前記周方向の一方側の第1リブと他方側の第2リブとを含み、
前記規制部材は、前記第1リブと前記第2リブとに結合されている、
請求項4に記載のシール装置。 - 前記第1リブには、前記回転部材の軸方向に前記第1リブを貫通する第1貫通孔が設けられ、
前記第2リブには、前記軸方向に前記第2リブを貫通する第2貫通孔が設けられ、
前記規制部材には、前記軸方向に前記規制部材を貫通する第3貫通孔と、前記第3貫通孔とは前記周方向に離間した位置で前記軸方向に前記規制部材を貫通する第4貫通孔とが設けられ、
前記規制部材と前記第1リブ及び前記第2リブとを結合する少なくとも2つの結合ピン、
を備え、
前記結合ピンの少なくとも1つは、前記第1貫通孔と前記第3貫通孔に挿入され、
前記結合ピンの少なくとも他の1つは、前記第2貫通孔と前記第4貫通孔に挿入される
請求項5に記載のシール装置。 - 前記規制部材には、前記第1リブを挟んで前記軸方向の一方側と他方側とに前記第3貫通孔が設けられ、及び、前記第2リブを挟んで前記軸方向の一方側と他方側とに前記第4貫通孔が設けられている
請求項6に記載のシール装置。 - 前記第1リブは、前記径方向内側に向かって凹んだ第1凹部が形成され、
前記第2リブは、前記径方向内側に向かって凹んだ第2凹部が形成され、
前記規制部材は、前記第1凹部に嵌合する第1突部と、前記第2凹部に嵌合する第2突部とを有する
請求項5に記載のシール装置。 - 前記規制部材は、結合部材によって前記切欠き部を挟んだ前記周方向の一方側の前記基部と他方側の前記基部とに固定される
請求項4に記載のシール装置。 - 前記規制部材は、前記リブを挟んで前記回転部材の軸方向の一方側から他方側まで延在している
請求項4に記載のシール装置。 - 前記規制部材は、前記付勢部材の付勢力に抗して前記付勢部材を前記径方向外側から押圧する押さえ板である
請求項4に記載のシール装置。 - 前記回転部材と、
前記静止部材と、
請求項1又は2に記載のシール装置と、
を備える
回転機械。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023574086A JP7558431B2 (ja) | 2022-01-17 | 2023-01-13 | シール装置及び回転機械 |
CN202380014782.1A CN118318122A (zh) | 2022-01-17 | 2023-01-13 | 密封装置及旋转机械 |
KR1020247021361A KR20240110872A (ko) | 2022-01-17 | 2023-01-13 | 시일 장치 및 회전 기계 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022005086 | 2022-01-17 | ||
JP2022-005086 | 2022-01-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023136314A1 true WO2023136314A1 (ja) | 2023-07-20 |
Family
ID=87279225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2023/000705 WO2023136314A1 (ja) | 2022-01-17 | 2023-01-13 | シール装置及び回転機械 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP7558431B2 (ja) |
KR (1) | KR20240110872A (ja) |
CN (1) | CN118318122A (ja) |
WO (1) | WO2023136314A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009185811A (ja) * | 2008-02-04 | 2009-08-20 | General Electric Co <Ge> | 引込み弾性プレートシール |
JP2012180874A (ja) * | 2011-02-28 | 2012-09-20 | Mitsubishi Heavy Ind Ltd | ターボ回転機械用の自動調整シール |
JP2016223426A (ja) * | 2015-05-27 | 2016-12-28 | ボン ゾ,ジョン | タービン用フレキシブルパッキンリング |
WO2020013109A1 (ja) * | 2018-07-13 | 2020-01-16 | 三菱日立パワーシステムズ株式会社 | フローガイド、蒸気タービン、内側部材及びフローガイドの製造方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3358994B2 (ja) | 1998-09-24 | 2002-12-24 | 三菱重工業株式会社 | ターボ回転機械の自動調整シール |
-
2023
- 2023-01-13 JP JP2023574086A patent/JP7558431B2/ja active Active
- 2023-01-13 CN CN202380014782.1A patent/CN118318122A/zh active Pending
- 2023-01-13 KR KR1020247021361A patent/KR20240110872A/ko unknown
- 2023-01-13 WO PCT/JP2023/000705 patent/WO2023136314A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009185811A (ja) * | 2008-02-04 | 2009-08-20 | General Electric Co <Ge> | 引込み弾性プレートシール |
JP2012180874A (ja) * | 2011-02-28 | 2012-09-20 | Mitsubishi Heavy Ind Ltd | ターボ回転機械用の自動調整シール |
JP2016223426A (ja) * | 2015-05-27 | 2016-12-28 | ボン ゾ,ジョン | タービン用フレキシブルパッキンリング |
WO2020013109A1 (ja) * | 2018-07-13 | 2020-01-16 | 三菱日立パワーシステムズ株式会社 | フローガイド、蒸気タービン、内側部材及びフローガイドの製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN118318122A (zh) | 2024-07-09 |
KR20240110872A (ko) | 2024-07-16 |
JPWO2023136314A1 (ja) | 2023-07-20 |
JP7558431B2 (ja) | 2024-09-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9194499B2 (en) | Shrouded face seal and components thereof | |
WO2016159004A1 (ja) | 可変容量型過給機 | |
US10711626B2 (en) | Guide vane ring and turbomachine | |
WO2017150450A1 (ja) | ノズル駆動機構、過給機、および、可変容量型過給機 | |
EP3819528B1 (en) | Cartridge seal assembly for rotational equipment | |
US10428673B2 (en) | Aspirating face seal assembly and a method of operating the same | |
WO2023136314A1 (ja) | シール装置及び回転機械 | |
JP6422308B2 (ja) | シール構造を備えたガスタービン | |
WO2016103340A1 (ja) | ノズル構造、及び回転機械 | |
CN112303234A (zh) | 高间隙密封组件 | |
CN114962287A (zh) | 压缩机 | |
WO2019031377A1 (ja) | セグメントシール | |
JP7187668B2 (ja) | コンプレッサホイール装置および過給機 | |
CN112771248B (zh) | 轮机定子、蒸汽轮机以及分隔板 | |
JP7566201B2 (ja) | 軸シール装置及び回転機械 | |
WO2023157520A1 (ja) | シール装置及び回転機械 | |
JP6633395B2 (ja) | シール構造体 | |
JP7311441B2 (ja) | コンプレッサ装置及びターボチャージャ | |
JP7343362B2 (ja) | 過給機 | |
TWI705190B (zh) | 軸承系統 | |
JP2022140035A (ja) | ターボチャージャ用のシャフト支持装置、およびターボチャージャ用のシャフト支持装置の組立方法 | |
JP2022191855A (ja) | タービン組立体及びタービン組立体の組立方法 | |
KR20230169229A (ko) | 시일 장치 및 회전 기계 및 시일 장치의 장착 방법 | |
JP2024015723A (ja) | ロータ及び圧縮機 | |
JP2024001627A (ja) | 回転機械の組立方法及び回転機械の組立用治具 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23740322 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2023574086 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202380014782.1 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 20247021361 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020247021361 Country of ref document: KR |