WO2023008060A1 - 軸シール装置及び回転機械 - Google Patents
軸シール装置及び回転機械 Download PDFInfo
- Publication number
- WO2023008060A1 WO2023008060A1 PCT/JP2022/025923 JP2022025923W WO2023008060A1 WO 2023008060 A1 WO2023008060 A1 WO 2023008060A1 JP 2022025923 W JP2022025923 W JP 2022025923W WO 2023008060 A1 WO2023008060 A1 WO 2023008060A1
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- WIPO (PCT)
- Prior art keywords
- seal
- leaf
- shaft
- axial direction
- rotating shaft
- Prior art date
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- 238000007789 sealing Methods 0.000 title claims abstract description 10
- 238000013459 approach Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 description 12
- 238000005339 levitation Methods 0.000 description 11
- 239000000567 combustion gas Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 230000014509 gene expression Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
-
- 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
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
- F16J15/3292—Lamellar structures
-
- 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
- F16J15/441—Free-space packings with floating ring
- F16J15/442—Free-space packings with floating ring segmented
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/31—Application in turbines in steam turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/55—Seals
- F05D2240/57—Leaf seals
Definitions
- the present disclosure relates to shaft sealing devices and rotating machines.
- This application claims priority based on Japanese Patent Application No. 2021-126309 filed with the Japan Patent Office on July 30, 2021, the contents of which are incorporated herein.
- gas turbines, steam turbines, etc. are provided with a shaft seal device around the rotating shaft to reduce the amount of gas leaking from the high pressure side to the low pressure side.
- a shaft seal device As an example of the shaft seal device, a leaf seal (registered trademark) is known (see, for example, Patent Document 1).
- a leaf seal can reduce the amount of leakage compared to, for example, a labyrinth seal.
- the leaf seal has a relatively long life because the tip of the leaf does not come into contact with the mating member during rated operation of the rotating machine.
- leaf seals tend to be costly due to the large number of components they comprise.
- At least one embodiment of the present disclosure aims at reducing the cost of the shaft seal device in view of the above circumstances.
- a shaft seal device a plurality of thin plates arranged in the circumferential direction of the rotating shaft and having a width in the axial direction of the rotating shaft; a seal ring including a seal mounting groove for mounting the plurality of thin plates; with An inner wall of the seal mounting groove on one side in the axial direction has a groove formed along the circumferential direction in a region radially inward of the rotating shaft.
- the cost of the shaft seal device can be reduced.
- FIG. 1 is a schematic diagram illustrating an example of a gas turbine system that includes a rotating machine according to one embodiment
- FIG. It is a cross-sectional schematic diagram which shows the outline of the shaft sealing device which concerns on this Embodiment.
- BRIEF DESCRIPTION OF THE DRAWINGS It is a cross-sectional schematic diagram which shows the outline of the shaft seal apparatus which concerns on one Embodiment.
- 4 is a cross-sectional view corresponding to the VV arrow view of FIG. 3
- FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5 and shows an example of a groove.
- FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG. 5, showing another example of the groove.
- 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.
- the shape including the part 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 schematic diagram showing an example of a gas turbine system 1 equipped with a rotating machine according to one embodiment.
- this gas turbine system 1 includes a compressor (rotating machine) 2 that compresses air G1 into compressed air G2, and supplies fuel to the compressed air G2 compressed by the compressor 2.
- a combustor 3 that mixes and burns, a turbine (rotary machine) 4 to which combustion gas G3 combusted in the combustor 3 is supplied, a rotary shaft 51 arranged in the compressor 2, and a rotating shaft 51 arranged in the turbine 4. and a rotor 5 having a rotating shaft 50 connected to the rotating shaft 52 .
- the compressor 2 has a casing 2K into which air G1 is introduced into the internal space.
- the compressor 2 compresses the air introduced into the internal space of the casing 2K into compressed air G2.
- the compressor 2 is provided with a support portion 2S having bearings that rotatably support the rotating shaft 50 .
- the turbine 4 has a casing 4K into which combustion gas G3 is introduced.
- the turbine 4 introduces and expands the combustion gas G3 generated in the combustor 3 into the internal space of the casing 4K, and converts the thermal energy of the combustion gas G3 into rotational energy.
- the turbine 4 is provided with a support portion 4S having bearings that rotatably support the rotating shaft 50 .
- the rotor 5 has rotor blades 51A provided on the rotating shaft 51 arranged in the internal space of the casing 2K, and rotor blades 52A provided on the rotating shaft 52 arranged in the inner space of the casing 4K.
- the compressor 2 has stationary blades 2A arranged in a casing 2K.
- the stationary blades 2A of the compressor 2 and the rotor blades 51A provided on the rotating shaft 51 are arranged alternately in a direction parallel to the axial direction of the axis AX of the rotating shaft 50 .
- the turbine 4 has stationary blades 4A arranged in a casing 4K.
- a plurality of stationary blades 4A of the turbine 4 and moving blades 52A provided on the rotating shaft 52 are alternately arranged in the axial direction of the rotating shaft 50 .
- the gas turbine system 1 also includes a shaft seal device 10 that is arranged inside the stator blade 2A in the casing 2K of the compressor 2 and seals the periphery of the rotating shaft 51, and is arranged in the casing 4K of the turbine 4. and a shaft seal device 10 for sealing the periphery of the rotating shaft 52 .
- a shaft seal device 10 arranged in the compressor 2 suppresses leakage of compressed air G2, which is a working fluid, from the high-pressure space side to the low-pressure space side. Further, the shaft seal device 10 of the compressor 2 is arranged on the support portion 2S.
- a shaft seal device 10 arranged in the turbine 4 suppresses leakage of the combustion gas G3, which is the working fluid, from the high pressure side to the low pressure side.
- a shaft seal device 10 of the turbine 4 is arranged on the inner peripheral portion of the stationary blade 4A. Further, the shaft seal device 10 of the turbine 4 is arranged on the support portion 4S.
- the combustion gas G3 introduced from the combustor 3 is supplied to the moving blades 52A inside the turbine 4.
- the thermal energy of the combustion gas G3 is converted into mechanical rotational energy to generate power.
- a part of the power generated by the turbine 4 is transmitted to the compressor 2 via the rotating shaft 50 .
- a part of the power generated by the turbine 4 is used as power for the compressor 2 .
- FIG. 2 is a schematic cross-sectional view showing the outline of the shaft seal device 10 according to this embodiment.
- 2 is a cross-sectional view corresponding to the arrow II-II in FIG. 1, and shows only the seal segment 11.
- FIG. 3 is a schematic cross-sectional view showing an outline of the shaft seal device 10 according to one embodiment, showing a cross section including the axis AX of the rotating shaft 52.
- FIG. 4 is a schematic cross-sectional view showing an outline of the shaft seal device 10 according to another embodiment, showing a cross section including the axis AX of the rotating shaft 52.
- FIG. 3 is a schematic cross-sectional view showing an outline of the shaft seal device 10 according to one embodiment, showing a cross section including the axis AX of the rotating shaft 52.
- FIG. 4 is a schematic cross-sectional view showing an outline of the shaft seal device 10 according to another embodiment, showing a cross section including the axis AX of the rotating shaft 52.
- the shaft seal device 10 provided in the turbine 4 will be described.
- the structure of the shaft seal device 10 provided in the compressor 2 is the same as the structure of the shaft seal device 10 provided in the turbine 4 .
- the shaft seal device 10 has a plurality of seal segments 11 arranged around the rotating shaft 52 .
- Each seal segment 11 has an arcuate shape in a plane perpendicular to the axis AX.
- eight seal segments 11 are arranged around the rotating shaft 50 .
- One of the two circumferentially adjacent seal segments 11 is also called a first segment 11A, and the other is also called a second segment 11B.
- Each seal segment 11 includes a plurality of leaves (thin plates) 20 arranged around a rotating shaft 52, a side plate 41 on the high pressure side, a seal ring 30 including seal mounting grooves 31 for mounting the plurality of leaves 20, Prepare.
- a seal ring 30 including seal mounting grooves 31 for mounting the plurality of leaves 20, Prepare.
- each seal segment 11 includes a coil spring 43 and a presser bolt 45 .
- each seal segment 11 comprises a shim 47 and a fastening bolt 48.
- the fastening bolt 48 is a bolt for connecting and integrating the low pressure side seal ring 301 and the high pressure side seal ring 302 .
- the seal segment 11 is inserted into the recess 9a of the housing 9 corresponding to the stationary blade 4A, and at least part of it is arranged in the recess 9a of the housing 9.
- the recess 9a has an opening 9k inside in the radial direction D3.
- the recessed portion 9 a extends in the circumferential direction D ⁇ b>2 of the rotating shaft 52 .
- a portion of the leaf 20 protrudes outside the recess 9a.
- the housing 9 is also provided for each of the stationary blade 2A, the support portion 2S, and the support portion 4S.
- each of the plurality of leaves 20 is a plate-like member having flexibility in the circumferential direction D2 of the rotating shaft 52 and is elastically deformable.
- the leaf 20 is a thin steel plate.
- the width direction of the leaf 20 substantially coincides with the axial direction D ⁇ b>1 of the rotary shaft 52 .
- the normal to the surface of the leaf 20 extends in a direction perpendicular to the axis AX of the rotating shaft 52 and inclined with respect to the circumferential direction D2 and the radial direction D3 of the rotating shaft 52 .
- the thickness direction of the leaf 20 extends in a direction perpendicular to the axis AX of the rotating shaft 52 and inclined with respect to the circumferential direction D2 and the radial direction D3 of the rotating shaft 52 . More specifically, the leaf 20 is inclined toward the downstream side in the rotation direction of the rotating shaft 52 as it goes inward in the radial direction D3. 2, the direction of the arrow representing the circumferential direction D2 represents the rotation direction of the rotating shaft 52. As shown in FIG. With such a configuration, the leaf 20 has relatively high rigidity in the axial direction D1 of the rotating shaft 52 .
- a plurality of leaves 20 are arranged at intervals in the circumferential direction D2 of the rotating shaft 52 .
- a gap S is formed between the leaf 20 and the leaf 20 adjacent to the leaf 20 (see FIG. 2).
- a plurality of leaves 20 form a leaf laminate 12 that is an aggregate (laminate) of a plurality of leaves 20 .
- the leaf stack 12 made up of the plurality of leaves 20 divides the space around the rotating shaft 52 into two spaces in the axial direction D1 of the rotating shaft 52 by sealing the periphery of the rotating shaft 52. do.
- the leaf stack 12 divides the space around the rotating shaft 52 into a high-pressure space (high-pressure side region) and a low-pressure space (low-pressure side region) having a relatively lower pressure than the high-pressure space. do.
- the plurality of leaves 20 have an outer base end portion (outer end portion) 20a and an inner tip portion (inner end portion) 20b in a radial direction D3 orthogonal to the axis AX of the rotating shaft 52. , a side end portion 20c that is a side edge near the high pressure space among both side edges in the axial direction of the rotating shaft 52, and a side end portion 20d that is a side edge near the low pressure space among the both side edges. .
- the base end portions 20a of the plurality of leaves 20 are collectively referred to as the base end portion 12a of the leaf stack 12, and the top end portions 20b of the plurality of leaves 20 are collectively referred to as the top end portion 12b of the leaf stack 12.
- the side ends 20c of the plurality of leaves 20 are collectively referred to as the side end 12c of the leaf stack 12, and the side ends 20d of the plurality of leaves 20 are collectively referred to as the side end 12d of the leaf stack 12.
- the base end portion 12a is an assembly of a plurality of base end portions 20a.
- the tip portion 12b is an assembly of a plurality of tip portions 20b.
- the side end portion 12c is an assembly of a plurality of side end portions 20c.
- the side end portion 12d is an assembly of a plurality of side end portions 20d.
- the base end portion 12a faces outward in the radial direction D3 of the rotating shaft 52.
- the distal end portion 12b is directed inward in the radial direction D3 of the rotating shaft 52 so as to face the outer peripheral surface 52a of the rotating shaft 52 .
- the tip portion 12b (tip portion 20b) is arranged outside the recessed portion 9a through the opening 9k. Note that the tip portion 12b (tip portion 20b) is arranged outside the seal mounting groove 31, which will be described in detail later.
- the side end portion 12c is directed toward the high-pressure space, which is the other side of the rotating shaft 52 in the axial direction D1.
- the side end portion 12d is directed toward the low-pressure space, which is one side of the rotating shaft 52 in the axial direction D1.
- the base end portions 20a of the plurality of leaves 20 are fixed to the seal ring 30 as described later and serve as fixed ends. Also, the tip portions 20b of the plurality of leaves 20 are free ends that are not fixed. A plurality of leaves 20 (leaf stack 12) are held by a seal ring 30 with their base ends 20a fixed.
- the leaf 20 has a head portion 21 provided with a base end portion 20a, and an elastically deformable trunk portion 22 provided with a tip end portion 20b, a side end portion 20c, and a side end portion 20d.
- the dimension of the trunk portion 22 in the width direction of the leaf 20, which is the axial direction D1 of the rotating shaft 52, is smaller than the dimension of the head portion 21.
- the dimension of the body 22 in the thickness direction of the leaf 20 is smaller than the dimension of the head 21 .
- the trunk portion 22 is provided with a notch portion 20x and a notch portion 20y at the boundary between the trunk portion 22 and the head portion 21 .
- the head portion 21 protrudes in the width direction from the notch portion 20x and the notch portion 20y on the base end portion 20a side.
- the plurality of leaves 20 includes an outer end portion (base end portion 20a) of the head portion 21 in the radial direction D3, a side end portion 21c and a side end portion 21d of the head portion 21 in the axial direction D1. and are connected to each other by welding.
- the side plate 41 is an arcuate thin plate extending in the circumferential direction D2.
- a normal line of the surface of the side plate 41 extends in the axial direction D1. That is, the thickness direction of the side plate 41 substantially coincides with the axial direction D1 of the rotating shaft 52 .
- the side plate 41 extends in the circumferential direction D2 from one end of the seal segment 11 in the circumferential direction D2 to the other end thereof.
- the side plate 41 is arranged next to the side end portion 20c facing the high pressure side space of the leaf 20 within the seal mounting groove 31 .
- the surface of the side plate 41 on one side (low-pressure space side) in the axial direction D1 faces the side end portion 20c facing the high-pressure space of the leaf 20 .
- a seal ring 30 is supported by the housing 9 and retains the leaf stack 12 .
- the housing 9 has a holding portion 9s that holds the seal ring 30 inside the recess 9a.
- the seal ring 30 is held by the holding portion 9s.
- the seal ring 30 is one integrally formed member.
- a seal ring 30 includes two members, a low pressure side seal ring (first member) 301 and a high pressure side seal ring (second member) 302. I'm in.
- the low-pressure side seal ring 301 and the high-pressure side seal ring 302 are coupled by the fastening bolts 48 and fixed integrally.
- a seal ring 30 shown in FIGS. 3 and 4 is formed with seal mounting grooves 31 for mounting a plurality of leaves 20 .
- the seal mounting groove 31 has a first groove portion 33 in which the head portion 21 of the leaf 20 is arranged and a second groove portion 34 in which the trunk portion 22 of the leaf 20 is arranged.
- the dimension of the first groove portion 33 in the axial direction D1 is larger than the dimension of the second groove portion 34 in the axial direction D1. Therefore, a step portion 35 exists at the boundary between the first groove portion 33 and the second groove portion 34 .
- a pressing bolt 45 is attached to the outer region of the first groove portion 33 of the seal ring 30 in the radial direction D3.
- the pressing bolt 45 presses the coil spring 43 for biasing the head portion 21 of the leaf 20 inward in the radial direction D3 from the outside in the radial direction D3 to apply a compressive force to the coil spring 43 .
- the head portion 21 of the leaf 20 is urged inward in the radial direction D3.
- the seal ring 30 is provided between an inner wall 33a on one side (low-pressure space side) and an inner wall 33b on the other side (high-pressure space side) in the axial direction D1 of the first groove portion 33. is divided into a low pressure side seal ring 301 and a high pressure side seal ring 302 at a position on the other side (high pressure space side) of an intermediate position in the axial direction D1 with respect to the inner walls 33a and 33b.
- the split position 303 between the low-pressure side seal ring 301 and the high-pressure side seal ring 302 is the axis of the leaf 20. It is near the inner wall 33a on one side in the axial direction D1 from the center position in the direction D1.
- a shim 47 is provided in a region of the seal ring 30 outside the first groove portion 33 in the radial direction D3, that is, a region of the low-pressure side seal ring 301 outside the first groove portion 33 in the radial direction D3. are placed.
- the shim 47 is arranged in the gap between the inner wall 33 c facing inward in the radial direction D ⁇ b>3 in the first groove portion 33 and the base end portion 20 a of the leaf 20 .
- the shim 47 is a member for fixing the head portion 21 of the leaf 20 so that the surface 35a of the step portion 35 and the end portion 21e of the head portion 21 of the leaf 20 are not separated in the radial direction D3.
- the head portion 21 of the leaf 20 is restricted from moving outward in the radial direction D3.
- the shaft sealing device 10 according to another embodiment shown in FIG. 4 may be provided with a coil spring 43 instead of the shim 47 .
- the inner wall 34a on one side (low pressure space side) in the axial direction D1 and the inner wall 34b on the other side (high pressure space side) of the second groove portion 34 of the seal mounting groove 31 are separated from each other. , are spaced apart and opposed along the axial direction D1.
- the inner wall 34a on one side in the axial direction D1 is formed on the low-pressure side seal ring 301, and the inner wall 34b on the other side is formed on the high-pressure side seal ring 302. As shown in FIG.
- FIG. 7 is a schematic cross-sectional view showing an outline of a conventional shaft seal device provided with a plurality of leaves 20, showing a cross section including the axis AX of the rotating shaft 52.
- a conventional shaft seal device 10X shown in FIG. 7 has a plurality of seal segments arranged around a rotating shaft 52, like the shaft seal device 10 according to the present embodiment described above.
- each seal segment includes a plurality of leaves (thin plates) 20 arranged around the rotary shaft 52, similarly to the shaft seal device 10 according to the present embodiment described above. and a side plate 41 on the high pressure side.
- each seal segment includes a seal ring 30X including grooves 31X for attaching a plurality of leaves 20, and a pair of leaf seal retainers ( retaining rings 91 and 92 , a side plate 42 on the low pressure side, and a leaf spring 93 .
- the conventional shaft seal device 10X includes a mounting piece 95 that is arranged in the groove 31X formed in the seal ring 30X together with these members.
- a pair of leaf seal retainers 91 and 92 sandwich the head portion 21 of the leaf 20 from one side and the other side in the axial direction D1.
- the side plate 42 is an arcuate thin plate extending in the circumferential direction D2.
- the thickness direction of the side plate 42 substantially coincides with the axial direction D ⁇ b>1 of the rotating shaft 52 .
- the side plate 42 extends in the circumferential direction D2 from one end of the seal segment in the circumferential direction D2 to the other end thereof.
- the side plate 42 is arranged next to the side end portion 20d facing the low pressure side space of the leaf 20 within the groove 31X.
- the side plate 42 is sandwiched between the side edge 20d of the leaf 20 and the side 95a of the mounting piece 95 facing the high pressure side space.
- the radially inner end 42a of the side plate 42 in the radial direction D3 is located radially further than the inner tip (inner end) 20b of the leaf 20 in the radial direction D3 and the mounting piece 95 radially inner end 95b in the radial direction D3. Located outside D3. Therefore, there is a gap corresponding to the thickness of the side plate 42 between the side end portion 20d of the leaf 20 and the side surface 95a of the mounting piece 95 in the radial direction D3 more inward than the radial direction D3 inner end portion 42a of the side plate 42 . A corresponding gap Sx is formed. This gap Sx plays a role of securing the levitation force of the leaf 20 in the same manner as the groove 36 to be described later.
- the leaf spring 93 is for biasing the head portion 21 of the leaf 20 inward in the radial direction D3.
- the inner wall 34b of may be formed of the same member.
- the number of parts can be reduced and the assembly cost can be reduced as compared with the case where the inner wall 34a on one side and the inner wall 34b on the other side are formed of different members.
- the seal ring 30 is open on the inner side in the radial direction D3 because the leaf 20 protrudes inward in the radial direction D3 from the inner end portion in the radial direction D3 of the seal mounting groove 31 . Therefore, when the inner wall 34a on one side of the seal mounting groove 31 and the inner wall 34b on the other side of the seal mounting groove 31 are formed of the same material, in forming the seal mounting groove 31, the seal mounting groove 31 is formed by cutting from the inside in the radial direction D3.
- the dimension of the seal mounting groove 31 in the radial direction D3 is larger than the dimension in the axial direction D1
- the outer region of the seal mounting groove 31 in the radial direction D3 (for example, the first groove portion 33) is It is more difficult to cut than the inner region (for example, the second groove portion 34).
- the dimension of the first groove portion 33 in the axial direction D1 is larger than the dimension of the second groove portion 34 in the axial direction D1. Therefore, it is relatively difficult to machine the first groove portion 33 by cutting from the inside in the radial direction D3.
- the inner wall 34a on one side of the seal mounting groove 31 and the inner wall 34b on the other side of the seal mounting groove 31 are formed of different materials, so that the outer region of the seal mounting groove 31 in the radial direction D3 is also machined. becomes easier. As a result, the accuracy of the seal mounting groove 31 can be easily ensured, so that the amount of fluid leakage in the shaft seal device 10 can be reduced.
- the low pressure side seal ring (first member) 301 and the high pressure side seal ring (second member) 302 are integrally fixed. It may be configured to be
- the contact position (division position 303) between the low-pressure side seal ring 301 and the high-pressure side seal ring 302 is preferably shifted to the one side in the axial direction D1 from the center position of the leaf 20 in the axial direction D1.
- the contact position (division position 303) between the low pressure side seal ring 301 and the high pressure side seal ring 302 may be shifted to the other side in the axial direction D1 from the center position of the leaf 20 in the axial direction D1.
- the leaf 20 When assembling the shaft seal device 10, the leaf 20 is arranged on either the low pressure side seal ring 301 or the high pressure side seal ring 302 before the low pressure side seal ring 301 and the high pressure side seal ring 302 are joined together. , to connect one member to the other. For example, as shown in FIG. 4, if the split position 303 is shifted to the other side so as to approach the high-pressure space, the part of the low-pressure side seal ring 301 where the end face corresponding to the split position 303 is formed (the inner wall 33c is formed). portion) along the axial direction D1 is longer than a similar portion of the high-pressure side seal ring 302 .
- the length along the axial direction of the portion of the high pressure side seal ring 302 where the end face corresponding to the split position 303 is formed is reduced to the low pressure space. It is longer than a similar portion of side seal ring 301 . Therefore, when the leaf 20 is attached to the seal ring 30, the leaf 20 and the shim 47 can be easily positioned by arranging the leaf 20 and the shim 47 from above with the high pressure side seal ring 302 facing downward.
- the shaft seal device 10 according to the present embodiment is arranged in the rotary machine so that the groove 36 is positioned in a region (low pressure side space) on the low pressure side with the shaft seal device 10 interposed therebetween. Further, in the shaft seal device 10 according to the present embodiment, of the both side edges of the leaf 20, the side edges 20c facing the high-pressure space with the shaft seal device 10 interposed therebetween are in contact with each other in the circumferential direction D2. A side plate 41 extending to the . Therefore, when assembling the shaft seal device 10 , it is easier to assemble if the side plate 41 is arranged on the leaf 20 .
- the low pressure side seal ring 301 having the groove 36 is positioned downward, the leaf 20 is arranged from above, and the side plate 41 is arranged from above. Therefore, if the division position 303 is shifted to the other side closer to the high-pressure space than the center position, the length of the portion of the low-pressure side seal ring 301 where the end face corresponding to the division position 303 is formed along the axial direction D1 is longer than a similar portion on the high pressure side seal ring 302 . If the dividing position 303 is displaced from the center position along the axial direction D1 in a direction away from the groove 36, the dividing position 303 will be displaced to the other side of the center position. It becomes easy to assemble the shaft seal device 10.
- FIG. 5 is a cross-sectional view corresponding to the VV arrow in FIG. 3, showing only the seal ring 30.
- FIG. 6A is a cross-sectional view taken along line VI-VI in FIG. 5 and shows an example of the groove 36.
- FIG. 6B is a sectional view taken along the line VI-VI in FIG. 5 and shows another example of the groove 36.
- FIG. The seal ring 30 shown in FIG. 3 and the seal ring 30 shown in FIG. 4 have the same shape of the groove 36, so FIG. The shape of the groove 36 will be described with reference to FIGS. 6A and 6B.
- FIGS. 6A and 6B two seal segments 11 adjacent in the circumferential direction D2 are shown separated in the circumferential direction D2 in FIG. The gap between the is almost eliminated.
- FIGS. 6A and 6B two seal segments 11 adjacent in the circumferential direction D2 are shown to contact each other in the circumferential direction D2.
- 5, 6A, and 6B show a first segment 11A, which is one of two seal segments 11 adjacent in the circumferential direction D2, and a second segment 11B, which is the other.
- the grooves 36 in the first segment 11A and the second segment 11B extend in the axial direction D1.
- the levitation force of the leaf 20 is likely to be reduced by dividing the seal ring 30 in the circumferential direction. In the vicinity of the position, the levitation force of the leaf 20 can be ensured, and contact between the leaf 20 and the rotating shaft 52 can be suppressed.
- the second depth d2 of the second region 362 is constant regardless of the position in the second region 362 in the circumferential direction D2. may be This makes it easier to process the second region 362 than when the second depth d2 varies depending on the position in the second region 362 in the circumferential direction D2.
- the second depth d2 of the second region 362 may increase as it approaches the end face 11e. .
- the levitation force of the leaf 20 tends to decrease as it approaches the split position (the end face 11e) of the seal ring 30 in the circumferential direction.
- the lifting force of the leaf 20 decreases as the position approaches the end face 11e. can be suppressed, and contact between the leaf 20 and the rotating shaft 52 can be suppressed.
- the first depth d1 is, for example, 0.15 mm or more and 0.30 mm or less
- the second depth d2 is the first depth d1 and is, for example, 0.35 mm or more and 0.60 mm or less.
- the second depth d2 should be the same in each of the two second regions 362 that are adjacent to each other with the end surface 11e interposed therebetween.
- the second depth d2 is preferably larger than the first depth d1 in at least a part of the second region 362, and is three times or less, and preferably about twice the first depth d1.
- the second depth d2 at a position in the circumferential direction D2 that is extremely close to the end face 11e should be within the range described above.
- the second depth is preferably larger than the first depth d1 in at least a part of the second region 362 in order to ensure sufficient buoyancy of the leaf 20.
- the levitation force of the leaf 20 in the vicinity of the end surface 11e is almost the same as when the second depth d2 exceeds three times the first depth d1. Therefore, even if the second depth d2 exceeds three times the first depth d1, the machining amount (cutting amount) for ensuring the second depth d2 only increases. According to the above configuration, the levitation force of the leaf 20 in the vicinity of the end surface 11e can be efficiently ensured.
- the width W1 (see FIG. 5) of the groove 36 ie the dimension in the radial direction D3 of the first region 361 and the second region 362, is approximately 5.5 mm.
- the length of the second region 362 in the circumferential direction D2 is approximately 50 mm.
- a plurality of shaft seal devices 10 are arranged in the circumferential direction D2 of the rotating shaft 52 (rotating shaft 50) and have a width in the axial direction D1 of the rotating shaft 52 (rotating shaft 50). and a seal ring 30 including seal mounting grooves 31 for mounting the plurality of thin plates (leaves 20).
- An inner wall 34a on one side in the axial direction D1 of the seal mounting groove 31 has a groove 36 formed along the circumferential direction D2 in a region inside the rotating shaft 52 (rotating shaft 50) in the radial direction D3.
- the pair of leaf seal retainers provided in the conventional shaft seal device, the annular plate arranged on one side (low pressure space side) in the axial direction D1, and the mounting piece can be omitted. Thereby, the cost of the shaft seal device 10 can be suppressed.
- the seal ring 30 includes at least a first segment 11A and a second segment 11B divided in the circumferential direction D2.
- the grooves 36 in the first segment 11A and the second segment 11B have a first region 361 having a first depth d1 in the axial direction D1, and the first segment 11A and the second segment and a second region 362 near the end surface 11e in the circumferential direction D2 in 11B and having a second depth d2 deeper than the first depth d1.
- the levitation force of the leaf 20 is increased in the vicinity of the split position in the circumferential direction of the seal ring 30 where the levitation force of the leaf 20 tends to decrease. is ensured, and contact between the leaf 20 and the rotating shaft 52 (rotating shaft 50) can be suppressed.
- the second depth d2 may increase as it approaches the end surface 11e.
- the levitation force of the leaf 20 tends to decrease as it approaches the split position (end face 11e) of the seal ring 30 in the circumferential direction.
- the second depth d2 as it approaches the end surface 11e, it is possible to suppress a decrease in the lifting force of the leaf 20 as it approaches the end surface 11e. 52 (rotating shaft 50) can be suppressed.
- the second depth d2 is greater than the first depth d1 and less than or equal to three times the first depth d1 in at least part of the second region 362.
- the inner wall 34a on the one side and the inner wall 34b on the other side in the axial direction D1 of the seal mounting groove 31 are: They may be formed in the same member.
- the number of parts can be reduced and the assembly cost can be reduced compared to the case where the inner wall 34a on one side and the inner wall 34b on the other side are formed of different members.
- the inner wall 34a on one side of the seal mounting groove 31 in the axial direction D1 and the inner wall 34b on the other side are different. It may be formed in the member.
- the outer region of the seal mounting groove 31 in the radial direction D3 is also machined. becomes easier. As a result, the accuracy of the seal mounting groove 31 can be easily ensured, so that the amount of fluid leakage in the shaft seal device 10 can be reduced.
- the seal ring 30 has a first member (low-pressure side seal ring 301) formed with an inner wall 34a on one side and an inner wall 34b on the other side.
- a second member (high-pressure side seal ring 302) is formed, and the first member (low-pressure side seal ring 301) and the second member (high-pressure side seal ring 302) are configured to be integrally fixed. I hope you are.
- the contact position (division position 303) between the first member (low-pressure side seal ring 301) and the second member (high-pressure side seal ring 302) is located axially D1 from the center position of the thin plate (leaf 20) in the axial direction D1. may be shifted to either one side or the other side of the
- the contact position (division position 303) is displaced from the center position along the axial direction D1 in a direction away from the groove 36.
- the abutment position (division position 303) is shifted to the other side of the center position, so assembly of the shaft seal device 10 having the side plate 41 is facilitated.
- a rotary machine (compressor 2, turbine 4) according to at least one embodiment of the present disclosure includes a rotating shaft 50 (rotating shaft 51, rotating shaft 52) and any one of (1) to (8) above. and a shaft seal device 10 configured as follows.
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Abstract
Description
本願は、2021年7月30日に日本国特許庁に出願された特願2021-126309号に基づき優先権を主張し、その内容をここに援用する。
回転軸の周方向に複数配置され、前記回転軸の軸方向に幅を有する複数の薄板と、
前記複数の薄板を取り付けるためのシール取付溝を含むシールリングと、
を備え、
前記シール取付溝の前記軸方向の一方側の内壁は、前記回転軸の径方向内側の領域において、前記周方向に沿って形成された溝を有する。
前記回転軸と、
請求項1乃至8の何れか一項に記載の軸シール装置と、
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。
なお、各実施の形態において共通する構成要素には同一の符号を付し、説明の重複を避ける。
図2は、本実施の形態に係る軸シール装置10の概略を示す断面模式図である。
なお、図2においては、図1のII-II矢視に相当する断面図であり、シールセグメント11だけを示している。
図3は、一実施形態に係る軸シール装置10の概略を示す断面模式図であり、回転軸52の軸線AXを含む断面について示している。
図4は、他の実施形態に係る軸シール装置10の概略を示す断面模式図であり、回転軸52の軸線AXを含む断面について示している。
なお、後で詳述するように、図4に示す他の実施形態に係る軸シール装置10では、シールリング30は、低圧側シールリング(第1部材)301と、高圧側シールリング(第2部材)302とに分割されている。
図4に示す他の実施形態に係る軸シール装置10では、各シールセグメント11は、シム47と、締結ボルト48とを備える。締結ボルト48は、低圧側シールリング301と高圧側シールリング302とを結合して一体化するためのボルトである。
本実施の形態では、複数のリーフ20のそれぞれは、回転軸52の周方向D2における可撓性を有する板状部材であり、弾性変形可能である。本実施の形態においては、リーフ20は、薄い鋼板である。リーフ20の幅方向は、回転軸52の軸方向D1と略一致する。リーフ20の表面の法線は、回転軸52の軸線AXに対して直交する方向であって、周方向D2及び回転軸52の径方向D3に対して傾いた方向に延在する。すなわち、リーフ20の厚さ方向は、回転軸52の軸線AXに対して直交する方向であって、周方向D2及び回転軸52の径方向D3に対して傾いた方向に延在する。
より具体的には、リーフ20は、径方向D3の内側に向かうにつれて、回転軸52の回転方向下流側に向かうように傾斜している。
なお、図2において、周方向D2を表す矢印の向きは、回転軸52の回転方向を表している。
このような構成により、リーフ20は、回転軸52の軸方向D1に比較的高い剛性を有する。
本実施の形態では、側板41は、周方向D2に延在する円弧状の薄板である。側板41の表面の法線は、軸方向D1に延在する。すなわち、側板41の厚さ方向は、回転軸52の軸方向D1と略一致する。側板41は、各シールセグメント11において、シールセグメント11の周方向D2の一方側の端部から他方側の端部まで周方向D2に延在する。
側板41は、シール取付溝31内でリーフ20の高圧側空間を向いている側端部20cの隣に配置されている。側板41は、軸方向D1の一方側(低圧空間側)の表面がリーフ20の高圧側空間を向いている側端部20cと対向している。
本実施の形態では、シールリング30は、ハウジング9に支持され、リーフ積層体12を保持する。ハウジング9は、凹部9aの内側にシールリング30を保持する保持部9sを有する。シールリング30は、保持部9sに保持される。
図4に示す他の実施形態に係る軸シール装置10では、シールリング30は、低圧側シールリング(第1部材)301と、高圧側シールリング(第2部材)302との2つの部材を含んでいる。図4に示す他の実施形態に係る軸シール装置10では、上述したように、低圧側シールリング301と高圧側シールリング302とは、締結ボルト48によって結合され、一体的に固定されている。
第1溝部33の軸方向D1の寸法は、第2溝部34の軸方向D1の寸法よりも大きい。そのため、第1溝部33と第2溝部34との境界部には、段差部35が存在する。段差部35における径方向D3外側を向いた面35aと、リーフ20の頭部21における径方向D3の内側の端部21eとが当接することで、シールリング30に対するリーフ20の径方向D3内側への移動が規制される。
これにより、図3に示す実施形態では、リーフ20の頭部21は、径方向D3の内側に向かって付勢される。
これにより、図4に示す実施形態では、リーフ20の頭部21は、径方向D3の外側への移動が規制される。
なお、図4に示す他の実施形態に係る軸シール装置10において、シム47に代えてコイルバネ43を備えていてもよい。
なお、図4に示す実施形態では、軸方向D1の一方側の内壁34aは低圧側シールリング301に形成されており、他方側の内壁34bは、高圧側シールリング302に形成されている。
なお、タービン4の運転中は、側板41における高圧側空間を向いた表面と、シール取付溝31の内壁34bとの間に隙間が生じる。
図7に示した従来の軸シール装置10Xは、上述した本実施の形態に係る軸シール装置10と同様に、回転軸52の周囲に配置される複数のシールセグメントを有する。
図7に示した従来の軸シール装置10Xにおいて、各シールセグメントは、上述した本実施の形態に係る軸シール装置10と同様に、回転軸52の周囲に配置される複数のリーフ(薄板)20と、高圧側の側板41とを備える。
また、図7に示した従来の軸シール装置10Xにおいて、各シールセグメントは、複数のリーフ20を取り付けるための凹溝31Xを含むシールリング30Xと、これらリーフ20を挟持する一対のリーフシールリテーナ(保持リング)91、92と、低圧側の側板42と、板ばね93とを備える。また、従来の軸シール装置10Xでは、これらの各部材とともにシールリング30Xに形成された凹溝31X内に配置される取り付けピース95を備える。
側板42は、凹溝31X内でリーフ20の低圧側空間を向いている側端部20dの隣に配置されている。側板42は、リーフ20の側端部20dと、取り付けピース95における高圧側空間を向いている側面95aとの間に挟まれている。
また、上述した幾つかの実施形態に係る軸シール装置10を備える回転機械では、軸シール装置10における作動流体の漏洩を抑制しつつ、回転機械のコストを抑制できる。
これにより、一方側の内壁34aと他方側の内壁34bとが異なる部材に形成されている場合と比べて部品点数を抑制でき、組み立てコストも抑制できる。
シールリング30は、シール取付溝31の径方向D3の内側の端部から径方向D3の内側に向かってリーフ20が突出しているため、径方向D3の内側が開いている。そのため、シール取付溝31の一方側の内壁34aと他方側の内壁34bとが同じ部材に形成されている場合、シール取付溝31の形成にあたり、径方向D3の内側から切削加工によってシール取付溝31を形成することになる。しかし、シール取付溝31は、軸方向D1の寸法よりも径方向D3の寸法の方が大きいため、シール取付溝31における径方向D3の外側の領域(例えば第1溝部33)は、径方向D3の内側の領域(例えば第2溝部34)よりも切削加工がし難い。上述したように、第1溝部33の軸方向D1の寸法は、第2溝部34の軸方向D1の寸法よりも大きい。そのため、径方向D3の内側からのアプローチによって第1溝部33を切削加工で加工するのは比較的困難である。
図4に示す実施形態のように、シール取付溝31の一方側の内壁34aと他方側の内壁34bとを異なる部材に形成することで、シール取付溝31における径方向D3の外側の領域も加工し易くなる。これにより、シール取付溝31の精度を確保し易くなるので、軸シール装置10における流体の漏洩量を低減できる。
例えば図4に示すように、分割位置303が高圧空間に近づくように他方側にずれていれば、低圧側シールリング301において分割位置303に相当する端面が形成される部位(内壁33cが形成された部位)の軸方向D1に沿った長さが高圧側シールリング302における同様の部位よりも長くなる。したがって、リーフ20をシールリング30に装着する際に、低圧側シールリング301を下にして上からリーフ20を配置することで、低圧側シールリング301のうち、分割位置303に相当する端面が形成された部位(内壁33cが形成された部位)がリーフ20のガイドのような役割を果たし、リーフ20の位置決めがし易い。
また、図4に示す実施形態のように、分割位置303に相当する端面が形成された部位(内壁33cが形成された部位)とリーフ20の基端部20aとの間の隙間にシム47を配置し易くなる。
分割位置303が上記中心位置よりも軸方向D1に沿って溝36よりも遠さかる方向にずれていれば、分割位置303が上記中心位置よりも他方側にずれることになるので、側板41を有する軸シール装置10の組立がし易くなる。
図3及び図4に示すシールリング30では、シール取付溝31の軸方向D1の一方側の内壁34aは、径方向D3の内側の領域において、周方向D2に沿って形成された溝36を有する。
図5は、図3のV-V矢視に相当する断面図であり、シールリング30だけを示している。
図6Aは、図5のVI-VI矢視断面図であり、溝36の一例を示している。
図6Bは、図5のVI-VI矢視断面図であり、溝36の他の一例を示している。
なお、図3に示すシールリング30と、図4に示すシールリング30とでは、溝36の形態は同じであるので、図3のV-V矢視に相当する断面図である図5、及び図6A、図6Bに基づいて、溝36の形状について説明する。
図6A及び図6Bでは、周方向D2で隣り合う2つのシールセグメント11を周方向D2で互いに当接するように図示している。
図5、図6A及び図6Bでは、周方向D2で隣り合う2つのシールセグメント11の一方である第1セグメント11Aと、他方である第2セグメント11Bとを示している。
図3及び図4に示す本実施の形態に係るシールリング30によれば、上述したような第2領域362を設けることで、リーフ20の浮上力が低下し易いシールリング30の周方向の分割位置の近傍において、リーフ20の浮上力を確保して、リーフ20と回転軸52との接触を抑制できる。
リーフ20の浮上力は、シールリング30の周方向の分割位置(上記端面11e)に近づくほど低下し易い。
図6Bに示すように第2領域362における周方向D2の位置が上記端面11eに近づくにつれて第2深さd2を深くすることで、上記端面11eに近づくにつれてリーフ20の浮上力が低下することとを抑制でき、リーフ20と回転軸52との接触を抑制できる。
第2深さd2は、少なくとも第2領域362の一部において、第1深さd1より大きく、3倍以下であるとよく、好ましくは2倍程度であるとよい。
なお、図6Bに示すように、第2深さd2が端面11eに近づくにつれて深くなる場合、端面11eに極めて近い周方向D2の位置における第2深さd2が上述した範囲となるとよい。
上記の構成によれば、端面11eの近傍におけるリーフ20の浮上力を効率よく確保できる。
また、産業用のガスタービンの場合、第2領域362の周方向D2の長さは、おおよそ50mmである。
(1)本開示の少なくとも一実施形態に係る軸シール装置10は、回転軸52(回転軸50)の周方向D2に複数配置され、回転軸52(回転軸50)の軸方向D1に幅を有する複数の薄板(リーフ20)と、複数の薄板(リーフ20)を取り付けるためのシール取付溝31を含むシールリング30と、を備える。シール取付溝31の軸方向D1の一方側の内壁34aは、回転軸52(回転軸50)の径方向D3の内側の領域において、周方向D2に沿って形成された溝36を有する。
上記(3)の構成によれば、第2深さd2を端面11eに近づくにつれて深くすることで、端面11eに近づくにつれてリーフ20の浮上力が低下することとを抑制でき、リーフ20と回転軸52(回転軸50)との接触を抑制できる。
2 圧縮機(回転機械)
4 タービン(回転機械)
10 軸シール装置
11 シールセグメント
11A 第1セグメント
11B 第2セグメント
11e 端面
20 リーフ(薄板)
30 シールリング
31 シール取付溝
34a、34b 内壁
41 側板(高圧側の側板)
50、51、52 回転軸
301 低圧側シールリング(第1部材)
302 高圧側シールリング(第2部材)
303 分割位置
Claims (9)
- 回転軸の周方向に複数配置され、前記回転軸の軸方向に幅を有する複数の薄板と、
前記複数の薄板を取り付けるためのシール取付溝を含むシールリングと、
を備え、
前記シール取付溝の前記軸方向の一方側の内壁は、前記回転軸の径方向内側の領域において、前記周方向に沿って形成された溝を有する
軸シール装置。 - 前記シールリングは、前記周方向に分割された第1セグメント及び第2セグメントを少なくとも含み、
前記第1セグメント及び前記第2セグメントにおける前記溝は、前記軸方向への深さが第1深さを有する第1領域と、前記第1領域よりも前記第1セグメント及び前記第2セグメントにおける前記周方向の端面に近く、前記第1深さよりも深い第2深さを有する第2領域とを含む
請求項1に記載の軸シール装置。 - 前記第2深さは、前記端面に近づくにつれて深くなる
請求項2に記載の軸シール装置。 - 前記第2深さは、少なくとも前記第2領域の一部において、前記第1深さより大きく、3倍以下である
請求項2又は3に記載の軸シール装置。 - 前記シール取付溝の前記軸方向の前記一方側の内壁と、他方側の内壁とは、同じ部材に形成されている
請求項1乃至3の何れか一項に記載の軸シール装置。 - 前記シール取付溝の前記軸方向の前記一方側の内壁と、他方側の内壁とは、異なる部材に形成されている
請求項1乃至3の何れか一項に記載の軸シール装置。 - 前記シールリングは、前記一方側の内壁が形成された第1部材と、前記他方側の内壁が形成された第2部材とを含み、前記第1部材と前記第2部材とが一体的に固定され、
前記第1部材と前記第2部材との当接位置は、前記薄板の前記軸方向の中心位置よりも前記軸方向の一方側又は他方側の何れかにずれている
請求項6に記載の軸シール装置。 - 前記当接位置は、前記中心位置よりも前記軸方向に沿って前記溝よりも遠さかる方向にずれている
請求項7に記載の軸シール装置。 - 前記回転軸と、
請求項1乃至3の何れか一項に記載の軸シール装置と、
を備える回転機械。
Priority Applications (5)
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JP2023538358A JP7456073B2 (ja) | 2021-07-30 | 2022-06-29 | 軸シール装置及び回転機械 |
KR1020237025224A KR20230119017A (ko) | 2021-07-30 | 2022-06-29 | 축 시일 장치 및 회전 기계 |
CN202280007632.3A CN116529460A (zh) | 2021-07-30 | 2022-06-29 | 轴密封装置及旋转机械 |
US18/276,351 US20240125391A1 (en) | 2021-07-30 | 2022-06-29 | Shaft seal device and rotary machine |
DE112022000132.1T DE112022000132T5 (de) | 2021-07-30 | 2022-06-29 | Wellendichtungsvorrichtung und rotationsmaschine |
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JP2021126309 | 2021-07-30 |
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US (1) | US20240125391A1 (ja) |
JP (1) | JP7456073B2 (ja) |
KR (1) | KR20230119017A (ja) |
CN (1) | CN116529460A (ja) |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002013647A (ja) * | 2000-04-28 | 2002-01-18 | Mitsubishi Heavy Ind Ltd | 軸シール機構及びガスタービン |
JP2011236969A (ja) * | 2010-05-10 | 2011-11-24 | Mitsubishi Heavy Ind Ltd | 軸シール装置の製造方法及び軸シール装置の生産治具、並びに、軸シール装置を備える回転機械 |
JP2014163420A (ja) * | 2013-02-22 | 2014-09-08 | Mitsubishi Heavy Ind Ltd | 軸シール装置及び回転機械 |
EP2818770A2 (en) * | 2013-06-28 | 2014-12-31 | Rolls-Royce plc | A leaf seal |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3872800B2 (ja) | 2003-05-21 | 2007-01-24 | 三菱重工業株式会社 | 軸シール機構、軸シール機構の組み付け構造、及び大型流体機械 |
JP7211380B2 (ja) | 2020-02-13 | 2023-01-24 | 株式会社三洋物産 | 遊技機 |
-
2022
- 2022-06-29 US US18/276,351 patent/US20240125391A1/en active Pending
- 2022-06-29 CN CN202280007632.3A patent/CN116529460A/zh active Pending
- 2022-06-29 KR KR1020237025224A patent/KR20230119017A/ko unknown
- 2022-06-29 WO PCT/JP2022/025923 patent/WO2023008060A1/ja active Application Filing
- 2022-06-29 JP JP2023538358A patent/JP7456073B2/ja active Active
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002013647A (ja) * | 2000-04-28 | 2002-01-18 | Mitsubishi Heavy Ind Ltd | 軸シール機構及びガスタービン |
JP2011236969A (ja) * | 2010-05-10 | 2011-11-24 | Mitsubishi Heavy Ind Ltd | 軸シール装置の製造方法及び軸シール装置の生産治具、並びに、軸シール装置を備える回転機械 |
JP2014163420A (ja) * | 2013-02-22 | 2014-09-08 | Mitsubishi Heavy Ind Ltd | 軸シール装置及び回転機械 |
EP2818770A2 (en) * | 2013-06-28 | 2014-12-31 | Rolls-Royce plc | A leaf seal |
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JP7456073B2 (ja) | 2024-03-26 |
US20240125391A1 (en) | 2024-04-18 |
DE112022000132T5 (de) | 2023-06-15 |
CN116529460A (zh) | 2023-08-01 |
JPWO2023008060A1 (ja) | 2023-02-02 |
KR20230119017A (ko) | 2023-08-14 |
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