WO2018155664A1 - 蒸気タービン - Google Patents

蒸気タービン Download PDF

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Publication number
WO2018155664A1
WO2018155664A1 PCT/JP2018/006844 JP2018006844W WO2018155664A1 WO 2018155664 A1 WO2018155664 A1 WO 2018155664A1 JP 2018006844 W JP2018006844 W JP 2018006844W WO 2018155664 A1 WO2018155664 A1 WO 2018155664A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle compartment
support
casing
steam turbine
compartment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/006844
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
伸 ▲柳▼沢
近藤　誠
雄久 ▲濱▼田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Power Ltd
Original Assignee
Mitsubishi Hitachi Power Systems Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Hitachi Power Systems Ltd filed Critical Mitsubishi Hitachi Power Systems Ltd
Priority to CN201880005201.7A priority Critical patent/CN110114556B/zh
Priority to US16/475,923 priority patent/US11136903B2/en
Priority to KR1020197017977A priority patent/KR102263903B1/ko
Priority to DE112018001019.8T priority patent/DE112018001019T5/de
Publication of WO2018155664A1 publication Critical patent/WO2018155664A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • 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
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine 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
    • F02C7/20—Mounting or supporting of plant; Accommodating heat expansion or creep
    • 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

Definitions

  • This disclosure relates to a steam turbine.
  • the vehicle compartment that houses the rotor of the steam turbine may be supported via a protrusion (cat leg) provided in the vehicle compartment.
  • a protrusion provided in the vehicle compartment.
  • protrusions provided so as to protrude in the axial direction from both ends of a lower half passenger compartment constituting a passenger compartment are placed on a column fixed to a foundation.
  • a turbine in which the chamber is supported is disclosed.
  • the surface of the passenger compartment including the protruding portion is covered with a heat insulating material.
  • the turbine casing may be deformed, the rotating part including the rotor and the stationary part including the casing may approach, and the clearance between the two may decrease.
  • the clearance between the rotating part and the stationary part of the steam turbine may reach a pinch point (a state in which the clearance is minimized) during start / stop.
  • it is necessary to ensure a large initial clearance In order to avoid contact between the rotating part and the stationary part of the steam turbine at the pinch point, it is necessary to ensure a large initial clearance.
  • the initial clearance is large, the clearance is unnecessarily widened when the steam turbine is rated, which may cause a decrease in the performance of the steam turbine. Therefore, it is desired to effectively suppress the vertical movement of the passenger compartment during the start / stop of the steam turbine in order to suppress the performance degradation of the steam turbine.
  • At least one embodiment of the present invention aims to provide a steam turbine capable of suppressing the vertical movement of the passenger compartment while the steam turbine is being started and stopped.
  • a steam turbine includes: A rotor shaft; A casing provided to cover the rotor shaft, and having a shaft penetration portion through which the rotor shaft passes, A vehicle compartment support that extends toward the inside of the vehicle compartment in the axial direction from the outer surface of the vehicle compartment at the periphery of the shaft penetrating portion and supports the vehicle compartment.
  • the vehicle compartment support is inserted inside the vehicle compartment from the outer surface of the vehicle compartment at the periphery of the shaft penetrating portion. Therefore, from the vehicle compartment support point to the vehicle compartment. The axial distance can be reduced. Thereby, the vertical movement of the passenger compartment accompanying the deformation of the passenger compartment can be suppressed during the thermal deformation of the passenger compartment during the start / stop of the steam turbine.
  • the vehicle compartment support is provided so that a gap is formed at least between the lower surface of the front end portion of the vehicle compartment support and the axial end surface and the vehicle compartment.
  • the lower surface and the axial end surface of the front end portion of the passenger compartment support do not come into contact with the passenger compartment, so that heat transfer between the passenger compartment and the passenger compartment support is suppressed, and the steam turbine It is possible to enjoy the effects of improving the efficiency, suppressing the thermal deformation of the passenger compartment during the start / stop of the steam turbine, and suppressing the vertical movement of the passenger compartment caused by the heat spread of the passenger compartment support.
  • the vehicle compartment is An upper half having an upper flange, A lower half portion having a lower flange portion fastened to the upper flange portion of the upper half portion; Including In the plan view, at least a part of the vehicle compartment support is located on the rotor shaft side of the upper flange portion and the lower flange portion on the rotor shaft side than the inner peripheral edge of the portion along the axial direction. It extends toward the inside of the passenger compartment in the axial direction from the outer surface.
  • At least a part of the vehicle compartment support is positioned closer to the rotor shaft than the inner peripheral edges of the upper flange portion and the lower flange portion. Can be positioned closer to the rotor shaft, and the vertical movement of the passenger compartment accompanying the deformation of the passenger compartment can be suppressed.
  • the vehicle compartment is An upper half having an upper flange, A lower half portion having a lower flange portion fastened to the upper flange portion of the upper half portion; Including In the plan view, the casing support is closer to the rotor shaft than the outer peripheral edge of the portion along the axial direction of the upper flange portion and the lower flange portion, than the outer surface of the casing. It extends toward the inside of the vehicle compartment in the axial direction.
  • the vehicle compartment support is positioned closer to the rotor shaft than the outer peripheral edges of the upper flange portion and the lower flange portion, so that the support point of the vehicle cabin by the vehicle cabin support is closer to the rotor shaft. Therefore, the vertical movement of the passenger compartment accompanying the deformation of the passenger compartment can be suppressed.
  • a vehicle compartment support liner provided between the vehicle compartment support and the vehicle compartment;
  • the outer end surface of the casing support liner is located on the inner side of the casing in the axial direction than the outer surface of the casing at the periphery of the shaft penetrating portion,
  • the vehicle compartment support is configured to support the vehicle compartment via the vehicle compartment support liner.
  • the position of the support point of the passenger compartment by the passenger compartment support (the position of the outer end surface of the passenger compartment support liner) can be brought closer to the passenger compartment in the axial direction, The vertical movement of the passenger compartment accompanying the deformation of the passenger compartment during the stop can be effectively suppressed. Further, it is possible to use a vehicle compartment support liner as a liner for adjusting the vertical position of the vehicle compartment when the vehicle compartment is installed.
  • a heat insulating material provided between the vehicle compartment support and the vehicle compartment;
  • the vehicle compartment support is configured to support the vehicle compartment via the heat insulating material.
  • the surface of the passenger compartment that is directly or indirectly supported from below by the passenger compartment support is positioned at the same height as the horizontal dividing surface of the passenger compartment.
  • the vehicle compartment surface positioned at the same height as the horizontal dividing surface of the vehicle compartment is supported from below by the vehicle compartment support.
  • a steam turbine capable of suppressing the vertical movement of the passenger compartment during the start / stop of the steam turbine.
  • FIG. 3 is a B arrow view of the steam turbine shown in FIG. 2. It is a figure showing the portion near the vehicle room support of the steam turbine concerning one embodiment. It is a figure showing the portion near the vehicle room support of the steam turbine concerning one embodiment.
  • FIG. 1 is a partial perspective view showing a schematic configuration of a steam turbine according to some embodiments
  • FIG. 2 is a plan view of the steam turbine shown in FIG. 1
  • FIG. 3 is a steam turbine shown in FIG.
  • FIG. 4 is a view of the steam turbine shown in FIG.
  • illustration of the vehicle compartment support described later is omitted.
  • illustration of piping connected to the passenger compartment for example, piping for supplying or discharging steam
  • 5 and 6 are each a diagram showing a portion near the passenger compartment support 30 of the steam turbine 1 according to one embodiment.
  • FIG. 5 is a partially enlarged view of FIG.
  • the steam turbine 1 includes a rotor shaft 2, a vehicle compartment 4 provided so as to cover the rotor shaft 2, and a vehicle compartment support 30 (not shown in FIG. 1) that supports the vehicle compartment 4. ) And.
  • the vehicle compartment 4 includes an end wall 10 located at an end portion in the axial direction, and a shaft through portion 11 through which the rotor shaft 2 passes. Note that a steam flow path through which steam flows is provided inside the casing 4, and the casing 4 accommodates a plurality of blades provided in the steam path around the rotor shaft 2.
  • the vehicle compartment 4 includes an upper half 6 located on the upper side and a lower half 8 located on the lower side.
  • the vehicle interior 4 is configured by fastening the lower flange portion 9.
  • the upper flange portion 7 and the lower flange portion 9 are each provided with a plurality of bolt holes (not shown), and bolts (not shown) are screwed into these bolt holes, whereby the upper flange portion 7 And the lower flange portion 9 may be fastened together.
  • the vehicle compartment support 30 that supports the vehicle compartment 4 has a vehicle compartment in the axial direction of the rotor shaft 2 (hereinafter also simply referred to as “axial direction”) rather than the outer surface 4 a of the vehicle compartment 4 at the periphery of the shaft penetrating portion 11. 4 extends toward the inside.
  • the vehicle compartment support 30 enters the inside of the vehicle compartment 4 rather than the outer surface 4a of the vehicle compartment 4 at the periphery of the shaft penetrating portion 11.
  • the distance La in the axial direction from the support point Ps 4 to the vehicle compartment 4 can be reduced. Thereby, the vertical motion of the compartment 4 accompanying a deformation
  • the axial distance La from the support point Ps of the vehicle compartment 4 to the vehicle compartment 4 by the vehicle compartment support 30 is the distance between the support point Ps and the end wall 10. It is shown as the distance in the axial direction.
  • the casing 4 is formed with a recess 12 that is recessed axially inward from the outer surface 4 a of the casing 4. 2 to 6, the front end portion 32 of the vehicle compartment support 30 is inserted into the concave portion 12 of the vehicle compartment 4, and the vehicle compartment 4 is supported by the front end portion 32 of the vehicle compartment support 30.
  • the recess 12 has a surface formed by cutting out the upper end portion of the lower half 8 of the vehicle compartment 4 and a part of the lower surface of the upper half 6 of the vehicle compartment 4. It is formed by.
  • the upper surface 32c of the tip end portion 32 of the vehicle compartment support 30 and the lower surface 12a of the upper half 6 forming the concave portion 12 come into contact with each other. It is supported by the tip 32 of the support 30.
  • the vehicle compartment 4 is provided with a vehicle compartment via a vehicle compartment support liner 36 provided in the recess 12 between the front end portion 32 of the vehicle compartment support 30 and the vehicle compartment 4. It is supported by the room support 30.
  • the axial distance La from the support point Ps of the vehicle compartment 4 by the vehicle compartment support 30 to the vehicle compartment 4 is further increased. It can be further reduced. Therefore, the vertical movement of the passenger compartment 4 accompanying the deformation of the passenger compartment 4 during the start / stop of the steam turbine 1 can be effectively suppressed.
  • the vehicle compartment support 30 includes at least a gap between the lower surface 32 a and the axial end surface 32 b of the front end portion 32 of the vehicle compartment support 30 and the vehicle compartment 4. 40 is formed.
  • the passenger compartment support 30 has a rotor shaft more than the inner peripheral edges 14A and 14B of the upper flange portion 7 and the lower flange portion 9 along the axial direction in plan view. On the second side, it extends toward the inside of the passenger compartment 4 in the axial direction from the outer surface 4 a of the passenger compartment 4.
  • the end surface 30 a closer to the rotor shaft 2 among the end surfaces extending in the axial direction of the vehicle compartment support 30 in the plan view includes the upper flange portion 7 and the lower surface.
  • inner peripheral edge 14A of the side flange portion 9 is located on the rotor shaft 2 side than the extended line L 1 of 14B. Therefore, part of the passenger compartment support 30 (portion of the rotor shaft 2 side than the extended line L 1) is inner peripheral edge 14A of the upper flange portion 7 and the lower flange part 9, located in the rotor shaft 2 side of the 14B ing.
  • the vehicle compartment support 30 can be The support point Ps of the vehicle compartment 4 by the vehicle compartment support 30 can be positioned closer to the rotor shaft 2 than when located on the opposite side of the rotor shaft 2 from the peripheral edges 14A and 14B. Thereby, the vertical motion of the compartment 4 accompanying a deformation
  • the vehicle compartment support 30 is closer to the rotor shaft 2 than the outer peripheral edges 16A and 16B of the upper flange portion 7 and the lower flange portion 9 along the axial direction in plan view. It extends toward the inside of the vehicle compartment 4 in the axial direction from the outer surface 4 a of the vehicle compartment 4.
  • the end surface 30 b far from the rotor shaft 2 includes the upper flange portion 7 and the lower side.
  • the outer peripheral edge 16A of the flange portion 9 is located on the rotor shaft 2 side than the extended line L 2 of 16B. Therefore, the entire vehicle compartment support 30 is located closer to the rotor shaft 2 than the outer peripheral edges 16A and 16B of the upper flange portion 7 and the lower flange portion 9.
  • the vehicle compartment support 30 on the rotor shaft 2 side with respect to the outer peripheral edges 16A and 16B of the upper flange portion 7 and the lower flange portion 9, the support point Ps of the vehicle compartment 4 by the vehicle compartment support 30 is provided. Can be positioned closer to the rotor shaft 2. Thereby, the vertical motion of the compartment 4 accompanying a deformation
  • a vehicle compartment support liner 36 is provided between the vehicle compartment support 30 and the vehicle compartment 4, and the outer end surface 36 a of the vehicle compartment support liner 36 has a shaft. It is located inside the vehicle compartment 4 in the axial direction from the outer surface 4a of the vehicle compartment 4 at the periphery of the penetrating portion 11.
  • the vehicle compartment support 30 is configured to support the vehicle compartment 4 via the vehicle compartment support liner 36.
  • the outer end surface 36 a of the vehicle compartment support liner 36 is an end surface of the end surface of the vehicle compartment support liner 36 that is located outside the vehicle compartment 4 in the axial direction.
  • the vehicle compartment support liner 36 is configured such that, in the concave portion 12 of the vehicle compartment 4, the upper surface 32 c of the vehicle compartment support 30 and the lower surface of the upper half 6 that forms the concave portion 12 of the vehicle compartment 4. 12a. Then, the upper surface 36 b of the vehicle compartment support liner 36 and the lower surface 12 a of the upper half 6 that forms the recess 12 come into contact with each other, so that the vehicle compartment 4 passes through the vehicle compartment support liner 36 and the front end portion of the vehicle compartment support 30. 32 is supported.
  • the outer end surface 36 a of the passenger compartment support liner 36 has a length L 2 in the axial direction than the outer surface 4 a of the passenger compartment 4 at the periphery of the shaft penetration portion 11. 4 is located inside.
  • the position Ps of the vehicle support point of the vehicle compartment support 30 (vehicle The position of the outer end surface 36a of the chamber support liner 36) can be brought closer to the vehicle compartment 4 in the axial direction.
  • transformation of the compartment 4 during the start / stop of the steam turbine 1 can be suppressed effectively.
  • the vehicle compartment support liner 36 as a liner for adjusting the vertical position of the vehicle compartment 4 when the vehicle compartment 4 is installed.
  • a heat insulating material 38 is provided between the passenger compartment support 30 and the passenger compartment 4.
  • the vehicle compartment support 30 is configured to support the vehicle compartment 4 via the heat insulating material 38.
  • the heat insulating material 38 may be a vehicle compartment support liner 36 (see FIG. 6) provided between the vehicle compartment support 30 and the vehicle compartment 4. Further, in some embodiments, the heat insulating material 38 may be a member different from the passenger compartment support liner 36.
  • the surface of the passenger compartment 4 that is directly or indirectly supported from below by the passenger compartment support 30 is located at the same height as the horizontal dividing surface 20 of the passenger compartment 4.
  • the horizontal dividing surface 20 is a surface in which the upper part and the lower part of the passenger compartment 4 are divided along the horizontal direction.
  • the horizontal dividing surface 20 is a surface on which the upper half 6 and the lower half 8 constituting the passenger compartment 4 are joined.
  • the horizontal dividing surface 20 may be a joint surface between the upper flange portion 7 of the upper half portion 6 and the lower flange portion 9 of the lower half portion 8. In the exemplary embodiment shown in FIGS.
  • the passenger compartment 4 is directly supported from below by the passenger compartment support 30 on the lower surface 12 a of the upper half 6 that forms the recess 12.
  • the passenger compartment 4 is indirectly connected from below by the passenger compartment support 30 via the passenger compartment support liner 36 on the lower surface 12 a of the upper half 6 that forms the recess 12. It is supported by.
  • the surface of the vehicle compartment 4 (for example, the lower surface 12a of the upper half 6 forming the recess 12) located at the same height as the horizontal dividing surface 20 of the vehicle compartment 4 is supported from below by the vehicle compartment support 30.
  • the support point Ps of the vehicle compartment 4 by the vehicle compartment support 30 becomes substantially the same height as the center of the rotor shaft 2 (so-called center support), and the vertical movement of the vehicle compartment 4 due to thermal deformation of the vehicle compartment 4 is suppressed. Can do.
  • an expression representing a relative or absolute arrangement such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial”. Represents not only such an arrangement strictly but also a state of relative displacement with tolerance or an angle or a distance to obtain the same function.
  • an expression indicating that things such as “identical”, “equal”, and “homogeneous” are in an equal state not only represents an exactly equal state, but also has a tolerance or a difference that can provide the same function. It also represents the existing state.
  • expressions representing shapes such as quadrangular shapes and cylindrical shapes not only represent shapes such as quadrangular shapes and cylindrical shapes in a strict geometric sense, but also within a range where the same effects can be obtained.
  • a shape including an uneven portion or a chamfered portion is also expressed.
  • the expression “comprising”, “including”, or “having” one constituent element is not an exclusive expression for excluding the existence of another constituent element.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
PCT/JP2018/006844 2017-02-27 2018-02-26 蒸気タービン Ceased WO2018155664A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201880005201.7A CN110114556B (zh) 2017-02-27 2018-02-26 蒸汽涡轮
US16/475,923 US11136903B2 (en) 2017-02-27 2018-02-26 Steam turbine
KR1020197017977A KR102263903B1 (ko) 2017-02-27 2018-02-26 증기 터빈
DE112018001019.8T DE112018001019T5 (de) 2017-02-27 2018-02-26 Dampfturbine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017034595A JP6694837B2 (ja) 2017-02-27 2017-02-27 蒸気タービン
JP2017-034595 2017-02-27

Publications (1)

Publication Number Publication Date
WO2018155664A1 true WO2018155664A1 (ja) 2018-08-30

Family

ID=63253954

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/006844 Ceased WO2018155664A1 (ja) 2017-02-27 2018-02-26 蒸気タービン

Country Status (6)

Country Link
US (1) US11136903B2 (enExample)
JP (1) JP6694837B2 (enExample)
KR (1) KR102263903B1 (enExample)
CN (1) CN110114556B (enExample)
DE (1) DE112018001019T5 (enExample)
WO (1) WO2018155664A1 (enExample)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7199248B2 (ja) * 2019-02-22 2023-01-05 三菱重工業株式会社 車室、及び蒸気タービン
JP7330084B2 (ja) * 2019-12-11 2023-08-21 株式会社東芝 蒸気タービン
DE112022003086T5 (de) * 2022-02-22 2024-03-28 Mitsubishi Heavy Industries, Ltd. Drehmaschinen-gehäuseträgerstruktur und drehmaschine

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JPH04262006A (ja) * 1990-10-25 1992-09-17 Westinghouse Electric Corp <We> 蒸気タービン及びその支持装置
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JPS59162303A (ja) * 1983-03-07 1984-09-13 Hitachi Ltd 蒸気タ−ビンの下半車室と前側軸受箱との結合構造
JPH04262006A (ja) * 1990-10-25 1992-09-17 Westinghouse Electric Corp <We> 蒸気タービン及びその支持装置
JP2016104975A (ja) * 2014-12-01 2016-06-09 三菱日立パワーシステムズ株式会社 蒸気タービンケーシング

Also Published As

Publication number Publication date
KR102263903B1 (ko) 2021-06-14
CN110114556B (zh) 2022-04-12
US11136903B2 (en) 2021-10-05
JP6694837B2 (ja) 2020-05-20
KR20190077111A (ko) 2019-07-02
CN110114556A (zh) 2019-08-09
JP2018141374A (ja) 2018-09-13
US20190345843A1 (en) 2019-11-14
DE112018001019T5 (de) 2019-11-28

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