WO2021149351A1 - Rotating machine support device, support method, and rotating machine - Google Patents

Rotating machine support device, support method, and rotating machine Download PDF

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Publication number
WO2021149351A1
WO2021149351A1 PCT/JP2020/044093 JP2020044093W WO2021149351A1 WO 2021149351 A1 WO2021149351 A1 WO 2021149351A1 JP 2020044093 W JP2020044093 W JP 2020044093W WO 2021149351 A1 WO2021149351 A1 WO 2021149351A1
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WIPO (PCT)
Prior art keywords
flange portion
foundation
rotating machine
support device
pressure
Prior art date
Application number
PCT/JP2020/044093
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French (fr)
Japanese (ja)
Inventor
伸 ▲柳▼沢
近藤　誠
貴史 音羽
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三菱重工業株式会社
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Publication of WO2021149351A1 publication Critical patent/WO2021149351A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • 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
    • 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

Definitions

  • This disclosure relates to a rotary machine support device, a support method, and a rotary machine.
  • Patent Document 1 the turbine is assembled in advance at the factory, and the gap between the casing (vehicle compartment) which is a stationary part and the rotor which is a rotating body is almost confirmed and adjusted, and the turbine is shipped in a completely assembled state.
  • This turbine assembly transport stand includes a casing support portion that supports the casing and a rotor support portion that supports the rotor as an integrated configuration, and the casing support portion is provided with a casing height adjustment mechanism for adjusting the height thereof.
  • the rotor support portion is provided with a rotor position adjusting mechanism for adjusting the support position, enabling assembly in a state where the levelness of the turbine is maintained and transportation in a fixed state after the assembly.
  • the passenger compartment which is a stationary part of the steam turbine, has a foot part (flange part), and this foot part is installed on a base plate which is a metal plate.
  • the base plate is fixed on a reinforced concrete foundation. Therefore, the passenger compartment is supported in the vertical direction by the foundation and the base plate.
  • the pedestal is anchored on the foundation, maintained horizontal via grout.
  • the foot portion is installed on the base plate by adjusting the level with an adjusting bolt.
  • the internal pressure drops after the vacuum is drawn at the time of starting, and the vacuum load acts downward due to the internal / external differential pressure affected by the external pressure.
  • the vacuum load acts downward due to the internal / external differential pressure affected by the external pressure.
  • it is supported by a foot portion and is configured to withstand a vacuum load.
  • the base plate and the foot part of the passenger compartment may be deformed according to the gap due to the vacuum load, and the entire passenger compartment may sink. ..
  • This amount of subduction is a level that adversely affects the pinch point, and if this event causes contact between the rotating body and the stationary portion, the performance may deteriorate.
  • the present disclosure is to solve the above-mentioned problems, and an object of the present disclosure is to provide a support device, a support method, and a rotary machine for a rotary machine capable of suppressing the vertical movement of the vehicle interior.
  • the support device for a rotating machine covers a rotating body whose axis is arranged horizontally and rotatably supported by bearings, and the rotating body.
  • variable mechanism includes the first member on the foundation side, the second member on the flange portion side, the first member and the second member. It is preferable to have a variable portion that relatively changes the distance in the vertical direction of the above.
  • a base plate horizontally arranged on the base plate is fixed, and the flange portion is attached on the base plate, and the variable portion is provided.
  • the mechanism may be provided between the foundation and the base plate.
  • variable mechanism may be provided at the central portion of the rotating body in the axial direction in the passenger compartment.
  • a fixing portion for fixing the flange portion of the vehicle compartment to the foundation side is further provided at the axial end portion of the rotating body in the passenger compartment. It is good to be prepared.
  • the method for supporting a rotating machine covers a rotating body whose axis is arranged horizontally and rotatably supported by a bearing, and the rotating body.
  • a variable mechanism provided in a rotating machine having a passenger compartment in which an outer flange portion is installed on a fixed foundation, and interposed between the foundation and the flange portion to change the vertical position of the flange portion.
  • a base plate horizontally arranged on the foundation is fixed, and the flange portion is attached on the base plate. Therefore, it is preferable to provide a spacer in the gap after raising the position of the flange portion by the variable mechanism.
  • the rotary machine includes the support device according to any one of the above-mentioned ones.
  • the sinking of the passenger compartment is corrected by changing the vertical position of the flange portion by a variable mechanism. Therefore, it is possible to prevent the vehicle interior from sinking during subsequent driving and suppress the vertical movement of the vehicle interior.
  • the initial clearance can be set small, the clearance during operation (rated) can be reduced, and the performance can be improved.
  • FIG. 1 is a schematic side view showing an example of a rotating machine.
  • FIG. 2 is a schematic plan view showing an example of a rotating machine.
  • FIG. 3 is a diagram showing a support device according to an embodiment of the present disclosure.
  • FIG. 4 is a diagram showing the operation of the support device according to the embodiment of the present disclosure.
  • FIG. 5 is a diagram showing the operation of the support device according to the embodiment of the present disclosure.
  • FIG. 6 is a diagram showing another example of the support device according to the embodiment of the present disclosure.
  • FIG. 7 is a diagram showing another example of the support device according to the embodiment of the present disclosure.
  • FIG. 1 is a schematic side view showing an example of a rotating machine.
  • FIG. 2 is a schematic plan view showing an example of a rotating machine.
  • the rotary machine in this embodiment takes the steam turbine 10 as an example.
  • the steam turbine 10 shown in FIGS. 1 to 2 has a high / medium pressure casing 11 and a low pressure casing 12.
  • the connecting portion 16 (see FIG. 2) between the high to medium pressure casing 11 and the low pressure casing 12 is hermetically sealed and connected via an expansion joint (not shown).
  • a rotor 17 provided with a blade row 13 is housed in the connected high / medium pressure casing 11 and the low pressure casing 12.
  • the axis C which is the center of rotation of the rotor 17, is arranged so as to extend along the horizontal direction in which the high and medium pressure casing 11 and the low pressure casing 12 are connected.
  • the direction in which the axial center C extends is called the axial direction.
  • Each end of the rotor 17 in the axial direction is rotatably supported by a bearing 18 on the outside of the high / medium pressure casing 11 and the low pressure casing 12. It should be noted that the blade row 13 and the rotor 17 are included and referred to as a rotating body.
  • the high / medium pressure casing 11, the low pressure casing 12, and the bearing 18 that supports the rotor 17 are supported by the foundation 19.
  • the foundation 19 is made of reinforced concrete and is firmly fixed to, for example, the building of a power plant. As shown in FIG. 2, the foundation 19 is formed with a recess 19A in which a part of the lower side of the high / medium pressure casing 11 and the low pressure casing 12 is housed. A part of the low-pressure passenger compartment 12 is housed in the recess 19A, and is installed on the foundation 19 via a flange portion 12C protruding outward.
  • the high-medium-pressure chassis 11 has a half-split structure of a high-medium-pressure upper half-chamber 11A and a high-medium-pressure lower-chamber 11B. It has been concluded.
  • the high-medium-pressure casing 11 is installed on the foundation 19 via a flange portion (not shown) protruding outward from the high-medium-pressure lower half-chamber 11B.
  • the low-pressure passenger compartment 12 has a half-split structure of the low-pressure upper half passenger compartment 12A and the low-pressure lower half passenger compartment 12B, and the low-pressure upper half passenger compartment 12A and the low-pressure lower half passenger compartment 12B are fastened to each other by bolts. There is.
  • the low-pressure passenger compartment 12 is installed on the foundation 19 via a flange portion 12C protruding outward from the low-pressure lower half passenger compartment 12B. Further, the lower portion of the low-pressure lower half passenger compartment 12B is connected to a condenser (not shown).
  • the high and medium pressure casing 11 and the low pressure casing 12 are evacuated at the time of starting.
  • the lower part of the low-pressure passenger compartment 12 is connected to the condenser, and the internal pressure is lowered by evacuation, and the vacuum load G acts downward as shown in FIG. 1 under the influence of the external pressure due to the internal-external differential pressure.
  • the low-pressure passenger compartment 12 is configured to withstand the vacuum load G.
  • the low-pressure passenger compartment 12 is formed with flange portions 12C on both sides with the axis C in between.
  • the base plate 20 made of a metal plate is fixed to the upper surface 19B of the foundation 19 on which the flange portion 12C of the low-pressure passenger compartment 12 is installed.
  • the base plate 20 is fixed to the upper surface 19B of the foundation 19 at a position below the flange portion 12C along the shape of the flange portion 12C.
  • the vacuum load G causes the base plate 20 according to the gap.
  • the flange portion 12C may be deformed, and a part of the low pressure passenger compartment 12 may sink as shown by an arrow A in FIG.
  • the subduction of the low-pressure cabin 12 tends to act on the connecting portion 16 side where the low-pressure chassis 12 is connected to the high-medium-pressure chassis 11.
  • a part of the low-pressure passenger compartment 12 may be lifted on the side opposite to the connecting portion 16 side in the axial direction, as shown by an arrow B in FIG.
  • a support device capable of suppressing the event of the steam turbine 10 which is such a rotating machine and suppressing the vertical movement of the low-pressure cabin 12 is provided.
  • FIG. 3 is a diagram showing a support device according to the present embodiment.
  • 4 and 5 are diagrams showing the operation of the support device according to the present embodiment.
  • the support device 1 has a variable mechanism 2 interposed between the foundation 19 and the flange portion 12C to change the vertical position of the flange portion 12C.
  • the variable mechanism 2 has a first member 2A, a second member 2B, and a variable portion 2C.
  • the first member 2A is formed in a plate shape and is arranged on the foundation 19 side.
  • the first member 2A is arranged on the base 19 at the bottom 19Ca of the recess 19C formed on the lower side of the base plate 20.
  • the second member 2B is arranged on the flange portion 12C side.
  • the second member 2B has a pressing surface 2Ba and an inclined surface 2Bb.
  • the pressing surface 2Ba is a flat surface that faces upward and is horizontal, and is arranged along the flange portion 12C.
  • the inclined surface 2Bb is provided flat on the lower side of the pressing surface 2Ba so as to be inclined with respect to the horizontal.
  • the variable portion 2C relatively changes the vertical distance between the first member 2A and the second member 2B.
  • the variable unit 2C has a mover 2Ca and a movement operation unit 2Cb.
  • the mover 2Ca is provided between the first member 2A and the second member 2B.
  • the mover 2Ca is horizontal so that it can come into contact with the flat bottom surface 2Caa which can come into contact with the flat support surface 2Ac which is the upper surface of the first member 2A and the inclined surface 2Bb of the second member 2B. It has a flat inclined surface 2Cab that inclines with respect to the surface.
  • the mover 2Ca supports the second member 2A in a state where the inclined surface 2Cab is in contact with the inclined surface 2Bb of the second member 2A and the bottom surface 2Caa is in contact with the support surface 2Ac of the first member 2A. Further, the mover 2Ca moves the second member 2A in the vertical direction by relatively sliding and moving along the direction in which the inclined surface 2Cab and the inclined surface 2Bbb are inclined. In this way, the mover 2Ca is a wedge that moves the second member 2B by sliding between the first member 2A fixed to the recess 19C of the foundation 19 and the second member 2B that can move in the vertical direction. It is formed in a shape.
  • the movement operation unit 2Cb is for sliding the mover 2Ca, and for example, a bolt or an actuator is used.
  • variable mechanism 2 configured in this way has a flange portion 12C so as not to receive the load (own weight) of the low-pressure cabin 12 when the steam turbine 10 is not assembled and operated. It is placed on the lower side.
  • the first member 2A is arranged at the bottom 19Ca of the recess 19C formed on the lower side of the base plate 20, and the second member 2B is the second member on the lower side of the base plate 20.
  • the pressing surface 2Ba of 2B is arranged.
  • FIG. 4 shows a state in which the grout 21 is contracted.
  • variable portion 2C of the variable mechanism 2 is operated to move the first member 2A and the second member 2B in the vertical direction.
  • the base plate 20 can be returned to the horizontal position as shown in FIG.
  • a spacer 4 such as a shim is provided in the gap where the base plate 20 is separated from the foundation 19.
  • FIG. 6 is a diagram showing another example of the support device according to the present embodiment.
  • the variable mechanism 2 may be provided between the foundation 19 and the flange portion 12C and configured to lift the flange portion 12C upward.
  • the spacer 4 is provided in a gap where the flange portion 12C is separated from the base plate 20.
  • the spacer 4 may not be provided, but in this case, the state in which the flange portion 12C is supported by the variable mechanism 2 is maintained.
  • the rotor (rotating body) 17 in which the axis C is arranged along the horizontal direction and is rotatably supported by the bearing 18, and the flange portion 12C on the outer side covering the rotor 17 Is provided in a steam turbine (rotary machine) 10 having a low-pressure cabin (chamber) 12 installed on a fixed foundation 19, and is interposed between the foundation 19 and the flange portion 12C of the flange portion 12C. It has a variable mechanism 2 that changes its position in the vertical direction.
  • the sinking of the low-pressure cabin 12 is corrected by changing the vertical position of the flange portion 12C by the variable mechanism 2. Therefore, it is possible to prevent the low-pressure passenger compartment 12 from sinking during subsequent operation and suppress the vertical movement of the low-pressure passenger compartment 12.
  • the initial clearance can be set small, the clearance during operation (rated) can be reduced, and the performance can be improved.
  • the vertical position of the flange portion 12C is changed by the variable mechanism 2 in a state where the low-pressure upper half-chamber 12A and the low-pressure lower half-chamber 12B of the low-pressure cabin 12 are fastened and the rotor 17 is covered. be able to.
  • the variable mechanism 2 When the variable mechanism 2 is not used, the low-pressure upper half-chamber 12A and the low-pressure lower half-chamber 12B are unfastened, the rotor 17 is removed, and the low-pressure lower half-chamber 12B is lifted by a crane or the like and subducted. Must be repaired. Therefore, the efficiency of the repair work can be improved by changing the vertical position of the flange portion 12C by the variable mechanism 2.
  • variable mechanism 2 has the first member 2A on the foundation 19 side, the second member 2B on the flange portion 12C side, and the first member 2A and the second member 2B in the vertical direction. It has a variable portion 2C that relatively changes the distance between the two.
  • variable mechanism 2 can change the position of the flange portion 12C in the vertical direction.
  • the base plate 20 horizontally arranged on the foundation 19 is fixed, and the flange portion 12C is attached on the base plate 20, and the variable mechanism 2 has a variable mechanism 2. It is provided between the foundation 19 and the base plate 20.
  • variable mechanism 2 can change the vertical position of the flange portion 12C via the base plate 20.
  • variable mechanism 2 is provided at the central portion of the rotor 17 in the low-pressure cabin 12 in the axial direction. Specifically, as shown in FIG. 3, the variable mechanism 2 is arranged on the flange portion 12C on the connecting portion 16 side where the low-pressure casing 12 is connected to the high-medium-pressure casing 11.
  • the subduction of the low-pressure cabin 12 tends to act on the connecting portion 16 side, which is the central portion in the axial direction in which the low-pressure cabin 12 is connected to the high-medium-pressure casing 11, and thus the central portion.
  • the position of the flange portion 12C when the position of the flange portion 12C is lowered by the load applied to the low pressure casing 12 during the operation of the steam turbine 10, the position of the flange portion 12C is raised by the variable mechanism 2 to raise the position of the flange portion 12C. Receives a part of the load applied to.
  • the spacer 4 is provided in the gap after the position of the flange portion 12C is raised by the variable mechanism 2.
  • FIG. 7 is a diagram showing another example of the support device according to the present embodiment.
  • the support device 1 fixes the flange portion 12C of the low-pressure casing 12 to the foundation 19 side at the axial end of the rotor 17 in the low-pressure casing 12.
  • a fixing portion 3 is further provided.
  • the fixing portion 3 is configured as a fixing bolt, penetrates the flange portion 12C, and is screwed into the base plate 20. Since the base plate 20 is fixed to the foundation 19 by the anchor bolts 22 as described above, the flange portion 12C is fixed to the foundation 19 via the base plate 20 by the fixing portion 3.
  • the position of the fixing portion 3 is a third extending at the flange portion 12C so as to intersect the axial center C on the opposite side in the axial direction from the connecting portion 16 side where the low pressure casing 12 is connected to the high and medium pressure casing 11. It is provided in the portion 12Cc.
  • Support device 2 Variable mechanism 2A First member 2Aa Support surface 2B Second member 2Ba Pressing surface 2Bb Inclined surface 2C Variable part 2Ca mover 2Caa Bottom surface 2Cab Inclined surface 2Cb Moving operation unit 3 Fixed part 4 Spacer 10 Steam turbine (rotary machine) 11 High-medium-pressure chassis 11A High-medium-pressure upper cab 11B High-medium-pressure lower cab 12 Low-pressure cab 12A Low-pressure upper cab 12B Low-pressure lower cab 12C Flange 13 Blade row 16 Connection 17 Rotor 18 Bearing 19 Foundation 19A Recess 19B Top surface 19C Recess 19Ca Bottom 20 Base plate 21 Graut C Axis G Vacuum load

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

In the present invention, the vertical movement of a compartment is suppressed. This rotating machine support device is provided to a steam turbine (rotating machine) that includes: a rotor (rotating body) in which the center axis thereof is disposed along the horizontal direction and which is rotatably supported by a bearing; and a low-pressure compartment (compartment) which covers the rotor and in which an outer flange is placed on a fixed foundation. The rotating machine support device includes a variable mechanism that is interposed between the foundation and the flange and that changes the vertical-direction position of the flange.

Description

回転機械の支持装置、支持方法および回転機械Rotating machine support device, support method and rotating machine
　本開示は、回転機械の支持装置、支持方法および回転機械に関する。 This disclosure relates to a rotary machine support device, a support method, and a rotary machine.
　例えば、特許文献１には、タービンを予め工場で組立て、静止部であるケーシング（車室）と回転体であるロータとの間隙確認や調整がほぼ済んだ、完全な組立状態にして出荷する一体輸送組を行う、タービン組立輸送架台について記載されている。このタービン組立輸送架台は、ケーシングを支持するケーシング支持部と、ロータを支持するロータ支持部とを一体構成として備え、ケーシング支持部にその高さ調整を行うためのケーシング高さ調整機構を設けるとともに、前記ロータ支持部にその支持位置を調整するためのロータ位置調整機構を設け、タービンの水平度を保持した状態での組立ておよびその組立て後の固定状態での輸送を可能としている。 For example, in Patent Document 1, the turbine is assembled in advance at the factory, and the gap between the casing (vehicle compartment) which is a stationary part and the rotor which is a rotating body is almost confirmed and adjusted, and the turbine is shipped in a completely assembled state. It describes the turbine assembly transport pedestal that carries out the transport group. This turbine assembly transport stand includes a casing support portion that supports the casing and a rotor support portion that supports the rotor as an integrated configuration, and the casing support portion is provided with a casing height adjustment mechanism for adjusting the height thereof. The rotor support portion is provided with a rotor position adjusting mechanism for adjusting the support position, enabling assembly in a state where the levelness of the turbine is maintained and transportation in a fixed state after the assembly.
特許第４３６３７９９号公報Japanese Patent No. 4363799
　回転機械として、例えば蒸気タービンでは、性能を向上させるため、シール部での蒸気のリークを減らすように定格時のクリアランスを低減することが重要である。一方、起動時や停止中に、静止部と回転体が最も接近する状態であるピンチポイントを迎える場合には、ピンチポイントでの接触を回避できるように初期クリアランスを確保する必要がある。 As a rotating machine, for example, in a steam turbine, it is important to reduce the clearance at the rated time so as to reduce the leakage of steam at the seal part in order to improve the performance. On the other hand, when the stationary portion and the rotating body reach the pinch point where they are closest to each other during startup or stop, it is necessary to secure an initial clearance so as to avoid contact at the pinch point.
　蒸気タービンの静止部である車室は、フート部（フランジ部）を有し、このフート部がメタル板である台板の上に据え付けられている。台板は、鉄筋コンクリートの基礎の上に固定されている。従って、車室は、基礎および台板に鉛直方向を支持されている。台板は、基礎の上にグラウトを介して水平を維持されてアンカーボルトで固定されている。フート部は、台板の上に調整ボルトで水平を調整されて据え付けられている。 The passenger compartment, which is a stationary part of the steam turbine, has a foot part (flange part), and this foot part is installed on a base plate which is a metal plate. The base plate is fixed on a reinforced concrete foundation. Therefore, the passenger compartment is supported in the vertical direction by the foundation and the base plate. The pedestal is anchored on the foundation, maintained horizontal via grout. The foot portion is installed on the base plate by adjusting the level with an adjusting bolt.
　そして、例えばダウンフローの低圧蒸気タービンの車室は、起動時の真空引き後に内圧が低下して外圧の影響を受ける内外差圧により真空荷重が下向きに作用する。通常の設計想定では、フート部で支持されており、真空荷重に耐え得るように構成されている。しかし、基礎のコンクリートやグラウトの収縮により基礎と台板の間に隙間があった場合、真空荷重によってその隙間に応じて台板および車室のフート部が変形し、車室全体が沈み込むおそれがある。この沈み込み量は、ピンチポイントに悪影響を及ぼすレベルであり、この事象により、回転体と静止部の接触を生じると、性能が低下する可能性がある。 Then, for example, in the passenger compartment of a downflow low-pressure steam turbine, the internal pressure drops after the vacuum is drawn at the time of starting, and the vacuum load acts downward due to the internal / external differential pressure affected by the external pressure. In a normal design assumption, it is supported by a foot portion and is configured to withstand a vacuum load. However, if there is a gap between the foundation and the base plate due to the shrinkage of the concrete or grout of the foundation, the base plate and the foot part of the passenger compartment may be deformed according to the gap due to the vacuum load, and the entire passenger compartment may sink. .. This amount of subduction is a level that adversely affects the pinch point, and if this event causes contact between the rotating body and the stationary portion, the performance may deteriorate.
　本開示は上述した課題を解決するものであり、車室の上下動を抑えることのできる回転機械の支持装置、支持方法および回転機械を提供することを目的とする。 The present disclosure is to solve the above-mentioned problems, and an object of the present disclosure is to provide a support device, a support method, and a rotary machine for a rotary machine capable of suppressing the vertical movement of the vehicle interior.
　上述の目的を達成するために、本開示の一態様に係る回転機械の支持装置は、軸心が水平に沿って配置されて軸受により回転可能に支持された回転体と、前記回転体を覆い外側のフランジ部が固定の基礎の上に据え付けられる車室と、を有する回転機械に設けられ、前記基礎と前記フランジ部との間に介在されて前記フランジ部の上下方向の位置を変える可変機構を有する。 In order to achieve the above object, the support device for a rotating machine according to one aspect of the present disclosure covers a rotating body whose axis is arranged horizontally and rotatably supported by bearings, and the rotating body. A variable mechanism provided in a rotary machine having a passenger compartment in which an outer flange portion is installed on a fixed foundation, and interposed between the foundation and the flange portion to change the vertical position of the flange portion. Has.
　また、本開示の一態様に係る回転機械の支持装置では、前記可変機構は、前記基礎側の第一部材と、前記フランジ部側の第二部材と、前記第一部材と前記第二部材との上下方向の距離を相対的に変える可変部と、を有することがよい。 Further, in the support device for the rotary machine according to one aspect of the present disclosure, the variable mechanism includes the first member on the foundation side, the second member on the flange portion side, the first member and the second member. It is preferable to have a variable portion that relatively changes the distance in the vertical direction of the above.
　また、本開示の一態様に係る回転機械の支持装置では、前記基礎の上に水平に配置された台板が固定され、当該台板の上に前記フランジ部が添え付けられており、前記可変機構は、前記基礎と前記台板との間に設けられていることがよい。 Further, in the support device for the rotary machine according to one aspect of the present disclosure, a base plate horizontally arranged on the base plate is fixed, and the flange portion is attached on the base plate, and the variable portion is provided. The mechanism may be provided between the foundation and the base plate.
　また、本開示の一態様に係る回転機械の支持装置では、前記可変機構は、前記車室における前記回転体の軸方向の中央部に設けられることがよい。 Further, in the support device for the rotating machine according to one aspect of the present disclosure, the variable mechanism may be provided at the central portion of the rotating body in the axial direction in the passenger compartment.
　また、本開示の一態様に係る回転機械の支持装置では、前記車室における前記回転体の軸方向の端部にて、前記車室の前記フランジ部を前記基礎側に固定する固定部をさらに備えることがよい。 Further, in the support device for the rotating machine according to one aspect of the present disclosure, a fixing portion for fixing the flange portion of the vehicle compartment to the foundation side is further provided at the axial end portion of the rotating body in the passenger compartment. It is good to be prepared.
　上述の目的を達成するために、本開示の一態様に係る回転機械の支持方法は、軸心が水平に沿って配置されて軸受により回転可能に支持された回転体と、前記回転体を覆い外側のフランジ部が固定の基礎の上に据え付けられる車室と、を有する回転機械に設けられ、前記基礎と前記フランジ部との間に介在されて前記フランジ部の上下方向の位置を変える可変機構を有する支持装置を用いた回転機械の支持方法であって、前記回転機械の運転時に前記車室に掛かる荷重で前記フランジ部の位置が下がった場合、前記可変機構により前記フランジ部の位置を上げる。 In order to achieve the above object, the method for supporting a rotating machine according to one aspect of the present disclosure covers a rotating body whose axis is arranged horizontally and rotatably supported by a bearing, and the rotating body. A variable mechanism provided in a rotating machine having a passenger compartment in which an outer flange portion is installed on a fixed foundation, and interposed between the foundation and the flange portion to change the vertical position of the flange portion. In a method of supporting a rotating machine using a support device having the above, when the position of the flange portion is lowered by a load applied to the passenger compartment during operation of the rotating machine, the position of the flange portion is raised by the variable mechanism. ..
　また、本開示の一態様に係る回転機械の支持方法では、前記回転機械は、前記基礎の上に水平に配置された台板が固定され、当該台板の上に前記フランジ部が添え付けられており、前記可変機構により前記フランジ部の位置を上げた後の隙間にスペーサを設けることがよい。 Further, in the method for supporting a rotating machine according to one aspect of the present disclosure, in the rotating machine, a base plate horizontally arranged on the foundation is fixed, and the flange portion is attached on the base plate. Therefore, it is preferable to provide a spacer in the gap after raising the position of the flange portion by the variable mechanism.
　上述の目的を達成するために、本開示の一態様に係る回転機械は、上述したいずれか１つに記載の支持装置を備えている。 In order to achieve the above-mentioned object, the rotary machine according to one aspect of the present disclosure includes the support device according to any one of the above-mentioned ones.
　本開示によれば、運転時の真空荷重により車室が沈み込む事象が生じた場合、可変機構によりフランジ部の上下方向の位置を変えることで、車室の沈み込みを直す。このため、その後の運転時に車室の沈み込むことを防止し、車室の上下動を抑えることができる。この結果、支持装置を備える回転機械では、初期クリアランスを小さく設定できるようになり、運転時（定格時）のクリアランスを低減でき、性能を向上できる。 According to the present disclosure, when an event occurs in which the passenger compartment sinks due to a vacuum load during driving, the sinking of the passenger compartment is corrected by changing the vertical position of the flange portion by a variable mechanism. Therefore, it is possible to prevent the vehicle interior from sinking during subsequent driving and suppress the vertical movement of the vehicle interior. As a result, in a rotating machine provided with a support device, the initial clearance can be set small, the clearance during operation (rated) can be reduced, and the performance can be improved.
図１は、回転機械の一例を示す概略側面図である。FIG. 1 is a schematic side view showing an example of a rotating machine. 図２は、回転機械の一例を示す概略平面図である。FIG. 2 is a schematic plan view showing an example of a rotating machine. 図３は、本開示の実施形態に係る支持装置を示す図である。FIG. 3 is a diagram showing a support device according to an embodiment of the present disclosure. 図４は、本開示の実施形態に係る支持装置の動作を示す図である。FIG. 4 is a diagram showing the operation of the support device according to the embodiment of the present disclosure. 図５は、本開示の実施形態に係る支持装置の動作を示す図である。FIG. 5 is a diagram showing the operation of the support device according to the embodiment of the present disclosure. 図６は、本開示の実施形態に係る支持装置の他の例を示す図である。FIG. 6 is a diagram showing another example of the support device according to the embodiment of the present disclosure. 図７は、本開示の実施形態に係る支持装置の他の例を示す図である。FIG. 7 is a diagram showing another example of the support device according to the embodiment of the present disclosure.
　以下に、本開示に係る実施形態を図面に基づいて詳細に説明する。なお、この実施形態によりこの開示が限定されるものではない。また、下記実施形態における構成要素には、当業者が置換可能かつ容易なもの、あるいは実質的に同一のものが含まれる。 Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. It should be noted that this embodiment does not limit this disclosure. In addition, the components in the following embodiments include those that can be easily replaced by those skilled in the art, or those that are substantially the same.
　図１は、回転機械の一例を示す概略側面図である。図２は、回転機械の一例を示す概略平面図である。 FIG. 1 is a schematic side view showing an example of a rotating machine. FIG. 2 is a schematic plan view showing an example of a rotating machine.
　本実施形態における回転機械は、蒸気タービン１０を一例としている。図１～図２に示す蒸気タービン１０は、高中圧車室１１および低圧車室１２を有する。高中圧車室１１と低圧車室１２との連結部１６（図２参照）は、図示しない伸縮継手を介して密封して連結されている。連結された高中圧車室１１および低圧車室１２には、翼列１３が設けられたロータ１７が収納されている。ロータ１７の回転中心である軸心Ｃは、高中圧車室１１と低圧車室１２とが連結する水平方向に沿って延びて配置されている。この軸心Ｃの延びる方向を軸方向という。ロータ１７は、軸方向の各端部が、高中圧車室１１と低圧車室１２との外側において軸受１８により回転可能に支持されている。なお、翼列１３およびロータ１７を含み回転体という。 The rotary machine in this embodiment takes the steam turbine 10 as an example. The steam turbine 10 shown in FIGS. 1 to 2 has a high / medium pressure casing 11 and a low pressure casing 12. The connecting portion 16 (see FIG. 2) between the high to medium pressure casing 11 and the low pressure casing 12 is hermetically sealed and connected via an expansion joint (not shown). A rotor 17 provided with a blade row 13 is housed in the connected high / medium pressure casing 11 and the low pressure casing 12. The axis C, which is the center of rotation of the rotor 17, is arranged so as to extend along the horizontal direction in which the high and medium pressure casing 11 and the low pressure casing 12 are connected. The direction in which the axial center C extends is called the axial direction. Each end of the rotor 17 in the axial direction is rotatably supported by a bearing 18 on the outside of the high / medium pressure casing 11 and the low pressure casing 12. It should be noted that the blade row 13 and the rotor 17 are included and referred to as a rotating body.
　高中圧車室１１と、低圧車室１２と、ロータ１７を支持する軸受１８とは、基礎１９によって支持されている。基礎１９は、鉄筋コンクリートで堅牢に構成され、例えば、発電所の建屋に固定されている。基礎１９は、図２に示すように、高中圧車室１１および低圧車室１２の下側の一部が収納される凹部１９Ａが形成されている。低圧車室１２は、凹部１９Ａに一部が収納され、外側に突出したフランジ部１２Ｃを介して基礎１９の上に据え付けられている。　 The high / medium pressure casing 11, the low pressure casing 12, and the bearing 18 that supports the rotor 17 are supported by the foundation 19. The foundation 19 is made of reinforced concrete and is firmly fixed to, for example, the building of a power plant. As shown in FIG. 2, the foundation 19 is formed with a recess 19A in which a part of the lower side of the high / medium pressure casing 11 and the low pressure casing 12 is housed. A part of the low-pressure passenger compartment 12 is housed in the recess 19A, and is installed on the foundation 19 via a flange portion 12C protruding outward.
　高中圧車室１１は、高中圧上半車室１１Ａと高中圧下半車室１１Ｂとの半割構造になっており、高中圧上半車室１１Ａと高中圧下半車室１１Ｂとがボルトにより互いに締結されている。高中圧車室１１は、高中圧下半車室１１Ｂの外側に突出したフランジ部（図示せず）を介して基礎１９の上に据え付けられている。 The high-medium-pressure chassis 11 has a half-split structure of a high-medium-pressure upper half-chamber 11A and a high-medium-pressure lower-chamber 11B. It has been concluded. The high-medium-pressure casing 11 is installed on the foundation 19 via a flange portion (not shown) protruding outward from the high-medium-pressure lower half-chamber 11B.
　低圧車室１２は、低圧上半車室１２Ａと低圧下半車室１２Ｂとの半割構造になっており、低圧上半車室１２Ａと低圧下半車室１２Ｂとがボルトにより互いに締結されている。低圧車室１２は、低圧下半車室１２Ｂの外側に突出したフランジ部１２Ｃを介して基礎１９の上に据え付けられている。また、低圧下半車室１２Ｂは、その下部が復水器（図示せず）に接続されている。 The low-pressure passenger compartment 12 has a half-split structure of the low-pressure upper half passenger compartment 12A and the low-pressure lower half passenger compartment 12B, and the low-pressure upper half passenger compartment 12A and the low-pressure lower half passenger compartment 12B are fastened to each other by bolts. There is. The low-pressure passenger compartment 12 is installed on the foundation 19 via a flange portion 12C protruding outward from the low-pressure lower half passenger compartment 12B. Further, the lower portion of the low-pressure lower half passenger compartment 12B is connected to a condenser (not shown).
　このような蒸気タービン１０において、起動時に高中圧車室１１および低圧車室１２が真空引きされる。低圧車室１２は、下部が復水器に接続されており、真空引きにより内圧が低下して内外差圧により外圧の影響を受けて図１に示すように真空荷重Ｇが下向きに作用する。 In such a steam turbine 10, the high and medium pressure casing 11 and the low pressure casing 12 are evacuated at the time of starting. The lower part of the low-pressure passenger compartment 12 is connected to the condenser, and the internal pressure is lowered by evacuation, and the vacuum load G acts downward as shown in FIG. 1 under the influence of the external pressure due to the internal-external differential pressure.
　低圧車室１２は、真空荷重Ｇに耐え得るように構成されている。低圧車室１２は、図２に示すように、軸心Ｃを間においた両側にフランジ部１２Ｃが形成されている。一方、低圧車室１２のフランジ部１２Ｃが据え付けられる基礎１９は、図２に示すように、その上面１９Ｂにメタル板からなる台板２０が固定されている。台板２０は、フランジ部１２Ｃの形状に沿ってフランジ部１２Ｃの下側の位置にて、基礎１９の上面１９Ｂに固定されている。 The low-pressure passenger compartment 12 is configured to withstand the vacuum load G. As shown in FIG. 2, the low-pressure passenger compartment 12 is formed with flange portions 12C on both sides with the axis C in between. On the other hand, as shown in FIG. 2, the base plate 20 made of a metal plate is fixed to the upper surface 19B of the foundation 19 on which the flange portion 12C of the low-pressure passenger compartment 12 is installed. The base plate 20 is fixed to the upper surface 19B of the foundation 19 at a position below the flange portion 12C along the shape of the flange portion 12C.
　しかし、基礎１９のコンクリートや、基礎１９と台板２０との間のグラウトの収縮により基礎１９と台板２０との間に隙間が生じた場合、真空荷重Ｇによってその隙間に応じて台板２０およびフランジ部１２Ｃが変形し、図１に矢印Ａで示すように低圧車室１２の一部が沈み込む事象が生じるおそれがある。この低圧車室１２の沈み込みは、低圧車室１２が高中圧車室１１と連結される連結部１６側で作用しやすい。このように低圧車室１２が沈み込むと、連結部１６側とは軸方向の反対側では、図１に矢印Ｂで示すように低圧車室１２の一部が浮き上がる事象が生じるおそれがある。 However, when a gap is created between the foundation 19 and the base plate 20 due to the concrete of the foundation 19 or the shrinkage of the grout between the foundation 19 and the base plate 20, the vacuum load G causes the base plate 20 according to the gap. Further, the flange portion 12C may be deformed, and a part of the low pressure passenger compartment 12 may sink as shown by an arrow A in FIG. The subduction of the low-pressure cabin 12 tends to act on the connecting portion 16 side where the low-pressure chassis 12 is connected to the high-medium-pressure chassis 11. When the low-pressure passenger compartment 12 is subducted in this way, a part of the low-pressure passenger compartment 12 may be lifted on the side opposite to the connecting portion 16 side in the axial direction, as shown by an arrow B in FIG.
　そこで、本実施形態では、このような回転機械である蒸気タービン１０の事象を抑制し、低圧車室１２の上下動を抑えることのできる支持装置を提供する。 Therefore, in the present embodiment, a support device capable of suppressing the event of the steam turbine 10 which is such a rotating machine and suppressing the vertical movement of the low-pressure cabin 12 is provided.
　図３は、本実施形態に係る支持装置を示す図である。図４および図５は、本実施形態に係る支持装置の動作を示す図である。 FIG. 3 is a diagram showing a support device according to the present embodiment. 4 and 5 are diagrams showing the operation of the support device according to the present embodiment.
　図３に示すように、支持装置１は、基礎１９とフランジ部１２Ｃとの間に介在されてフランジ部１２Ｃの上下方向の位置を変える可変機構２を有する。 As shown in FIG. 3, the support device 1 has a variable mechanism 2 interposed between the foundation 19 and the flange portion 12C to change the vertical position of the flange portion 12C.
　可変機構２は、第一部材２Ａと、第二部材２Ｂと、可変部２Ｃと、を有する。 The variable mechanism 2 has a first member 2A, a second member 2B, and a variable portion 2C.
　第一部材２Ａは、板状に形成されて基礎１９側に配置される。第一部材２Ａは、基礎１９において、台板２０の下側に形成された凹所１９Ｃの底部１９Ｃａに配置される。 The first member 2A is formed in a plate shape and is arranged on the foundation 19 side. The first member 2A is arranged on the base 19 at the bottom 19Ca of the recess 19C formed on the lower side of the base plate 20.
　第二部材２Ｂは、フランジ部１２Ｃ側に配置される。第二部材２Ｂは、押圧面２Ｂａと、傾斜面２Ｂｂと、を有する。押圧面２Ｂａは、上方に向き水平な平坦面であってフランジ部１２Ｃに沿って配置される。傾斜面２Ｂｂは、押圧面２Ｂａの下側で、水平に対して傾斜して平坦に設けられている。 The second member 2B is arranged on the flange portion 12C side. The second member 2B has a pressing surface 2Ba and an inclined surface 2Bb. The pressing surface 2Ba is a flat surface that faces upward and is horizontal, and is arranged along the flange portion 12C. The inclined surface 2Bb is provided flat on the lower side of the pressing surface 2Ba so as to be inclined with respect to the horizontal.
　可変部２Ｃは、第一部材２Ａと第二部材２Ｂとの上下方向の距離を相対的に変える。可変部２Ｃは、移動子２Ｃａと、移動操作部２Ｃｂと、を有する。移動子２Ｃａは、第一部材２Ａと第二部材２Ｂとの間に設けられている。移動子２Ｃａは、第一部材２Ａにおける上面である平坦な支持面２Ａｃに対向して接触し得る平坦な底面２Ｃａａと、第二部材２Ｂにおける傾斜面２Ｂｂに対向して接触し得るように水平に対して傾斜する平坦な傾斜面２Ｃａｂと、を有している。従って、移動子２Ｃａは、傾斜面２Ｃａｂが第二部材２Ａの傾斜面２Ｂｂに接触し、底面２Ｃａａが第一部材２Ａの支持面２Ａｃに接触している状態で、第二部材２Ａを支持する。また、移動子２Ｃａは、傾斜面２Ｃａｂおよび傾斜面２Ｂｂｂが傾斜する方向に沿って相対的にスライド移動することで、第二部材２Ａを上下方向に移動させる。このように、移動子２Ｃａは、基礎１９の凹所１９Ｃに固定の第一部材２Ａと、上下方向に移動可能な第二部材２Ｂとの間で、スライド移動により第二部材２Ｂを移動させる楔形状に形成されている。移動操作部２Ｃｂは、移動子２Ｃａをスライド移動させるためのもので、例えばボルトやアクチュエータが用いられる。 The variable portion 2C relatively changes the vertical distance between the first member 2A and the second member 2B. The variable unit 2C has a mover 2Ca and a movement operation unit 2Cb. The mover 2Ca is provided between the first member 2A and the second member 2B. The mover 2Ca is horizontal so that it can come into contact with the flat bottom surface 2Caa which can come into contact with the flat support surface 2Ac which is the upper surface of the first member 2A and the inclined surface 2Bb of the second member 2B. It has a flat inclined surface 2Cab that inclines with respect to the surface. Therefore, the mover 2Ca supports the second member 2A in a state where the inclined surface 2Cab is in contact with the inclined surface 2Bb of the second member 2A and the bottom surface 2Caa is in contact with the support surface 2Ac of the first member 2A. Further, the mover 2Ca moves the second member 2A in the vertical direction by relatively sliding and moving along the direction in which the inclined surface 2Cab and the inclined surface 2Bbb are inclined. In this way, the mover 2Ca is a wedge that moves the second member 2B by sliding between the first member 2A fixed to the recess 19C of the foundation 19 and the second member 2B that can move in the vertical direction. It is formed in a shape. The movement operation unit 2Cb is for sliding the mover 2Ca, and for example, a bolt or an actuator is used.
　このように構成された可変機構２は、図３に示すように、蒸気タービン１０を組み立てて運転をしていない状態において、低圧車室１２の荷重（自重）を受けないようにフランジ部１２Ｃの下側に配置される。具体的には、可変機構２は、第一部材２Ａが台板２０の下側に形成された凹所１９Ｃの底部１９Ｃａに配置され、第二部材２Ｂが台板２０の下側に第二部材２Ｂの押圧面２Ｂａが配置されている。　 As shown in FIG. 3, the variable mechanism 2 configured in this way has a flange portion 12C so as not to receive the load (own weight) of the low-pressure cabin 12 when the steam turbine 10 is not assembled and operated. It is placed on the lower side. Specifically, in the variable mechanism 2, the first member 2A is arranged at the bottom 19Ca of the recess 19C formed on the lower side of the base plate 20, and the second member 2B is the second member on the lower side of the base plate 20. The pressing surface 2Ba of 2B is arranged.
　そして、図４に示すように、例えば、基礎１９のコンクリートや、基礎１９と台板２０との間のグラウト２１の収縮により基礎１９と台板２０との間に隙間が生じた場合、真空荷重Ｇによってその隙間に応じて低圧車室１２の一部が沈み込む事象が生じる。図４では、グラウト２１が収縮した状態を示している。 Then, as shown in FIG. 4, for example, when the concrete of the foundation 19 or the shrinkage of the grout 21 between the foundation 19 and the base plate 20 causes a gap between the foundation 19 and the base plate 20, a vacuum load is applied. Due to G, a part of the low-pressure passenger compartment 12 sinks according to the gap. FIG. 4 shows a state in which the grout 21 is contracted.
　この事象が生じた場合、蒸気タービン１０の運転を停止した状態で、図５に示すように、可変機構２の可変部２Ｃを操作して第一部材２Ａと第二部材２Ｂとの上下方向の距離を相対的に変え、第二部材２Ｂの押圧面２Ｂａで台板２０を上方に持ち上げることで、台板２０を図５に示すような水平な位置に戻すことができる。 When this event occurs, with the operation of the steam turbine 10 stopped, as shown in FIG. 5, the variable portion 2C of the variable mechanism 2 is operated to move the first member 2A and the second member 2B in the vertical direction. By changing the distance relatively and lifting the base plate 20 upward by the pressing surface 2Ba of the second member 2B, the base plate 20 can be returned to the horizontal position as shown in FIG.
　また、フランジ部１２Ｃを組み立て時の位置に戻すと、フランジ部１２Ｃが台板２０から離れる。このため、図５に示すように、台板２０が基礎１９から離れた隙間にシムなどのスペーサ４を設ける。なお、スペーサ４を設けた場合、可変機構２により台板２０を支持した状態を維持してもよく、可変機構２による台板２０の支持を解いてもよい。図５に示すスペーサ４は設けなくてもよいが、この場合は可変機構２で台板２０を支持した状態を維持する。 Further, when the flange portion 12C is returned to the position at the time of assembly, the flange portion 12C is separated from the base plate 20. Therefore, as shown in FIG. 5, a spacer 4 such as a shim is provided in the gap where the base plate 20 is separated from the foundation 19. When the spacer 4 is provided, the state in which the base plate 20 is supported by the variable mechanism 2 may be maintained, or the support of the base plate 20 by the variable mechanism 2 may be released. The spacer 4 shown in FIG. 5 may not be provided, but in this case, the state in which the base plate 20 is supported by the variable mechanism 2 is maintained.
　図６は、本実施形態に係る支持装置の他の例を示す図である。図６に示すように、可変機構２は、基礎１９とフランジ部１２Ｃとの間に設けられてフランジ部１２Ｃを上方に持ち上げるように構成されていてもよい。この場合、スペーサ４は、フランジ部１２Ｃが台板２０から離れた隙間に設けられる。このようにスペーサ４を設けた場合、可変機構２によりフランジ部１２Ｃを支持した状態を維持してもよく、可変機構２によるフランジ部１２Ｃの支持を解いてもよい。スペーサ４は設けなくてもよいが、この場合は可変機構２でフランジ部１２Ｃを支持した状態を維持する。 FIG. 6 is a diagram showing another example of the support device according to the present embodiment. As shown in FIG. 6, the variable mechanism 2 may be provided between the foundation 19 and the flange portion 12C and configured to lift the flange portion 12C upward. In this case, the spacer 4 is provided in a gap where the flange portion 12C is separated from the base plate 20. When the spacer 4 is provided in this way, the state in which the flange portion 12C is supported by the variable mechanism 2 may be maintained, or the support of the flange portion 12C by the variable mechanism 2 may be released. The spacer 4 may not be provided, but in this case, the state in which the flange portion 12C is supported by the variable mechanism 2 is maintained.
　このように、本実施形態の支持装置１は、軸心Ｃが水平に沿って配置されて軸受１８により回転可能に支持されたロータ（回転体）１７と、ロータ１７を覆い外側のフランジ部１２Ｃが固定の基礎１９の上に据え付けられる低圧車室（車室）１２と、を有する蒸気タービン（回転機械）１０に設けられ、基礎１９とフランジ部１２Ｃとの間に介在されてフランジ部１２Ｃの上下方向の位置を変える可変機構２を有する。 As described above, in the support device 1 of the present embodiment, the rotor (rotating body) 17 in which the axis C is arranged along the horizontal direction and is rotatably supported by the bearing 18, and the flange portion 12C on the outer side covering the rotor 17 Is provided in a steam turbine (rotary machine) 10 having a low-pressure cabin (chamber) 12 installed on a fixed foundation 19, and is interposed between the foundation 19 and the flange portion 12C of the flange portion 12C. It has a variable mechanism 2 that changes its position in the vertical direction.
　従って、運転時の真空荷重Ｇにより低圧車室１２が沈み込む事象が生じた場合、可変機構２によりフランジ部１２Ｃの上下方向の位置を変えることで、低圧車室１２の沈み込みを直す。このため、その後の運転時に低圧車室１２が沈み込むことを防止し、低圧車室１２の上下動を抑えることができる。この結果、支持装置１を備える蒸気タービン１０では、初期クリアランスを小さく設定できるようになり、運転時（定格時）のクリアランスを低減でき、性能を向上できる。なお、可変機構２によるフランジ部１２Ｃの上下方向の位置の可変は、低圧車室１２の低圧上半車室１２Ａと低圧下半車室１２Ｂとを締結し、かつロータ１７を覆った状態で行うことができる。可変機構２を用いない場合は、低圧上半車室１２Ａと低圧下半車室１２Ｂとの締結を外し、ロータ１７を取り除いた状態として、低圧下半車室１２Ｂをクレーンなどで持ち上げて沈み込みを補修しなければならない。従って、可変機構２によりフランジ部１２Ｃの上下方向の位置を変えることで、補修作業の効率化を図ることができる。 Therefore, when an event occurs in which the low-pressure cabin 12 sinks due to the vacuum load G during operation, the sinking of the low-pressure cabin 12 is corrected by changing the vertical position of the flange portion 12C by the variable mechanism 2. Therefore, it is possible to prevent the low-pressure passenger compartment 12 from sinking during subsequent operation and suppress the vertical movement of the low-pressure passenger compartment 12. As a result, in the steam turbine 10 provided with the support device 1, the initial clearance can be set small, the clearance during operation (rated) can be reduced, and the performance can be improved. The vertical position of the flange portion 12C is changed by the variable mechanism 2 in a state where the low-pressure upper half-chamber 12A and the low-pressure lower half-chamber 12B of the low-pressure cabin 12 are fastened and the rotor 17 is covered. be able to. When the variable mechanism 2 is not used, the low-pressure upper half-chamber 12A and the low-pressure lower half-chamber 12B are unfastened, the rotor 17 is removed, and the low-pressure lower half-chamber 12B is lifted by a crane or the like and subducted. Must be repaired. Therefore, the efficiency of the repair work can be improved by changing the vertical position of the flange portion 12C by the variable mechanism 2.
　また、本実施形態の支持装置１では、可変機構２は、基礎１９側の第一部材２Ａと、フランジ部１２Ｃ側の第二部材２Ｂと、第一部材２Ａと第二部材２Ｂとの上下方向の距離を相対的に変える可変部２Ｃと、を有する。 Further, in the support device 1 of the present embodiment, the variable mechanism 2 has the first member 2A on the foundation 19 side, the second member 2B on the flange portion 12C side, and the first member 2A and the second member 2B in the vertical direction. It has a variable portion 2C that relatively changes the distance between the two.
　従って、この可変機構２により、フランジ部１２Ｃの上下方向の位置を変えることを実施できる。 Therefore, the variable mechanism 2 can change the position of the flange portion 12C in the vertical direction.
　また、本実施形態の支持装置１では、基礎１９の上に水平に配置された台板２０が固定され、当該台板２０の上にフランジ部１２Ｃが添え付けられており、可変機構２は、基礎１９と台板２０との間に設けられている。 Further, in the support device 1 of the present embodiment, the base plate 20 horizontally arranged on the foundation 19 is fixed, and the flange portion 12C is attached on the base plate 20, and the variable mechanism 2 has a variable mechanism 2. It is provided between the foundation 19 and the base plate 20.
　従って、可変機構２により、台板２０を介してフランジ部１２Ｃの上下方向の位置を変えることができる。 Therefore, the variable mechanism 2 can change the vertical position of the flange portion 12C via the base plate 20.
　また、本実施形態の支持装置１では、可変機構２は、低圧車室１２におけるロータ１７の軸方向の中央部に設けられる。具体的には、可変機構２は、図３に示すように、フランジ部１２Ｃにおいて、低圧車室１２が高中圧車室１１と連結される連結部１６側に配置される。 Further, in the support device 1 of the present embodiment, the variable mechanism 2 is provided at the central portion of the rotor 17 in the low-pressure cabin 12 in the axial direction. Specifically, as shown in FIG. 3, the variable mechanism 2 is arranged on the flange portion 12C on the connecting portion 16 side where the low-pressure casing 12 is connected to the high-medium-pressure casing 11.
　従って、上述したように、低圧車室１２の沈み込みは、低圧車室１２が高中圧車室１１と連結される軸方向の中央部である連結部１６側で作用しやすいため、この中央部に可変機構２を設けることで、低圧車室１２の沈み込むことを防止できる。 Therefore, as described above, the subduction of the low-pressure cabin 12 tends to act on the connecting portion 16 side, which is the central portion in the axial direction in which the low-pressure cabin 12 is connected to the high-medium-pressure casing 11, and thus the central portion. By providing the variable mechanism 2 in the vehicle, it is possible to prevent the low-pressure passenger compartment 12 from sinking.
　また、本実施形態の支持方法は、蒸気タービン１０の運転時に低圧車室１２に掛かる荷重でフランジ部１２Ｃの位置が下がった場合、可変機構２によりフランジ部１２Ｃの位置を上げて低圧車室１２に掛かる荷重の一部を受ける。 Further, in the support method of the present embodiment, when the position of the flange portion 12C is lowered by the load applied to the low pressure casing 12 during the operation of the steam turbine 10, the position of the flange portion 12C is raised by the variable mechanism 2 to raise the position of the flange portion 12C. Receives a part of the load applied to.
　従って、運転時に低圧車室１２の沈み込むことを防止し、低圧車室１２の上下動を抑えることができる。 Therefore, it is possible to prevent the low-pressure cabin 12 from sinking during operation and suppress the vertical movement of the low-pressure cabin 12.
　また、本実施形態の支持方法は、可変機構２によりフランジ部１２Ｃの位置を上げた後の隙間にスペーサ４を設ける。 Further, in the support method of the present embodiment, the spacer 4 is provided in the gap after the position of the flange portion 12C is raised by the variable mechanism 2.
　従って、台板２０に対するフランジ部１２Ｃの据え付け状態を確保できる。 Therefore, the installation state of the flange portion 12C with respect to the base plate 20 can be ensured.
　図７は、本実施形態に係る支持装置の他の例を示す図である。 FIG. 7 is a diagram showing another example of the support device according to the present embodiment.
　図７に示すように、支持装置１は、上述した可変機構２に加え、低圧車室１２におけるロータ１７の軸方向の端部にて、低圧車室１２のフランジ部１２Ｃを基礎１９側に固定する固定部３をさらに備える。 As shown in FIG. 7, in addition to the variable mechanism 2 described above, the support device 1 fixes the flange portion 12C of the low-pressure casing 12 to the foundation 19 side at the axial end of the rotor 17 in the low-pressure casing 12. A fixing portion 3 is further provided.
　固定部３は、固定ボルトとして構成され、フランジ部１２Ｃを貫通し台板２０にねじ込まれる。台板２０は、上述したようにアンカーボルト２２により基礎１９に固定されているからフランジ部１２Ｃは、固定部３により台板２０を介して基礎１９に固定される。 The fixing portion 3 is configured as a fixing bolt, penetrates the flange portion 12C, and is screwed into the base plate 20. Since the base plate 20 is fixed to the foundation 19 by the anchor bolts 22 as described above, the flange portion 12C is fixed to the foundation 19 via the base plate 20 by the fixing portion 3.
　また、固定部３の位置は、フランジ部１２Ｃにおいて、低圧車室１２が高中圧車室１１と連結される連結部１６側とは軸方向の反対側で軸心Ｃに交差して延びる第三部分１２Ｃｃに設けられる。 Further, the position of the fixing portion 3 is a third extending at the flange portion 12C so as to intersect the axial center C on the opposite side in the axial direction from the connecting portion 16 side where the low pressure casing 12 is connected to the high and medium pressure casing 11. It is provided in the portion 12Cc.
　上述したように、連結部１６側とは軸方向の反対側では、上述したように低圧車室１２の一部が浮き上がる事象が生じるおそれがある。従って、低圧車室１２の浮き上がる部分を固定部３で固定することで、低圧車室１２の浮き上がる事象が生じることも防止できる。 As described above, on the side opposite to the connecting portion 16 side in the axial direction, there is a possibility that a part of the low-pressure passenger compartment 12 may be lifted as described above. Therefore, by fixing the floating portion of the low-pressure passenger compartment 12 with the fixing portion 3, it is possible to prevent the event that the low-pressure passenger compartment 12 is lifted.
　１　支持装置
　２　可変機構
　２Ａ　第一部材
　２Ａａ　支持面
　２Ｂ　第二部材
　２Ｂａ　押圧面
　２Ｂｂ　傾斜面
　２Ｃ　可変部
　２Ｃａ　移動子
　２Ｃａａ　底面
　２Ｃａｂ　傾斜面
　２Ｃｂ　移動操作部
　３　固定部
　４　スペーサ
　１０　蒸気タービン（回転機械）
　１１　高中圧車室
　１１Ａ　高中圧上半車室
　１１Ｂ　高中圧下半車室
　１２　低圧車室
　１２Ａ　低圧上半車室
　１２Ｂ　低圧下半車室
　１２Ｃ　フランジ部
　１３　翼列
　１６　連結部
　１７　ロータ
　１８　軸受
　１９　基礎
　１９Ａ　凹部
　１９Ｂ　上面
　１９Ｃ　凹所
　１９Ｃａ　底部
　２０　台板
　２１　グラウト
　Ｃ　軸心
　Ｇ　真空荷重 1 Support device 2 Variable mechanism 2A First member 2Aa Support surface 2B Second member 2Ba Pressing surface 2Bb Inclined surface 2C Variable part 2Ca mover 2Caa Bottom surface 2Cab Inclined surface 2Cb Moving operation unit 3 Fixed part 4 Spacer 10 Steam turbine (rotary machine)
11 High-medium-pressure chassis 11A High-medium-pressure upper cab 11B High-medium-pressure lower cab 12 Low-pressure cab 12A Low-pressure upper cab 12B Low-pressure lower cab 12C Flange 13 Blade row 16 Connection 17 Rotor 18 Bearing 19 Foundation 19A Recess 19B Top surface 19C Recess 19Ca Bottom 20 Base plate 21 Graut C Axis G Vacuum load

Claims (8)

  1. 　軸心が水平に沿って配置されて軸受により回転可能に支持された回転体と、前記回転体を覆い外側のフランジ部が固定の基礎の上に据え付けられる車室と、を有する回転機械に設けられ、
    　前記基礎と前記フランジ部との間に介在されて前記フランジ部の上下方向の位置を変える可変機構を有する、回転機械の支持装置。     Provided in a rotating machine having a rotating body whose axes are arranged horizontally and rotatably supported by bearings, and a passenger compartment that covers the rotating body and has an outer flange portion installed on a fixed foundation. Be,
    A support device for a rotating machine having a variable mechanism interposed between the foundation and the flange portion to change the vertical position of the flange portion.
  2. 　前記可変機構は、
    　前記基礎側の第一部材と、
    　前記フランジ部側の第二部材と、
    　前記第一部材と前記第二部材との上下方向の距離を相対的に変える可変部と、
    　を有する、請求項１に記載の回転機械の支持装置。     The variable mechanism is
    With the first member on the foundation side
    The second member on the flange side and
    A variable portion that relatively changes the vertical distance between the first member and the second member,
    The support device for a rotating machine according to claim 1.
  3. 　前記基礎の上に水平に配置された台板が固定され、当該台板の上に前記フランジ部が添え付けられており、
    　前記可変機構は、前記基礎と前記台板との間に設けられている、請求項１または２に記載の回転機械の支持装置。     A base plate horizontally arranged on the foundation is fixed, and the flange portion is attached on the base plate.
    The rotary machine support device according to claim 1 or 2, wherein the variable mechanism is provided between the foundation and the base plate.
  4. 　前記可変機構は、前記車室における前記回転体の軸方向の中央部に設けられる、請求項１から３のいずれか１項に記載の回転機械の支持装置。 The support device for a rotating machine according to any one of claims 1 to 3, wherein the variable mechanism is provided at the central portion of the rotating body in the axial direction in the passenger compartment.
  5. 　前記車室における前記回転体の軸方向の端部にて、前記車室の前記フランジ部を前記基礎側に固定する固定部をさらに備える、請求項４に記載の回転機械の支持装置。 The support device for a rotating machine according to claim 4, further comprising a fixing portion for fixing the flange portion of the passenger compartment to the foundation side at an axial end portion of the rotating body in the passenger compartment.
  6. 　軸心が水平に沿って配置されて軸受により回転可能に支持された回転体と、前記回転体を覆い外側のフランジ部が固定の基礎の上に据え付けられる車室と、を有する回転機械に設けられ、前記基礎と前記フランジ部との間に介在されて前記フランジ部の上下方向の位置を変える可変機構を有する支持装置を用いた回転機械の支持方法であって、
    　前記回転機械の運転時に前記車室に掛かる荷重で前記フランジ部の位置が下がった場合、前記可変機構により前記フランジ部の位置を上げる、回転機械の支持方法。     Provided in a rotating machine having a rotating body whose axes are arranged horizontally and rotatably supported by bearings, and a passenger compartment that covers the rotating body and has an outer flange portion installed on a fixed foundation. It is a method of supporting a rotating machine using a support device having a variable mechanism that is interposed between the foundation and the flange portion and changes the position of the flange portion in the vertical direction.
    A method for supporting a rotating machine, in which the position of the flange portion is raised by the variable mechanism when the position of the flange portion is lowered by a load applied to the passenger compartment during operation of the rotating machine.
  7. 　前記回転機械は、前記基礎の上に水平に配置された台板が固定され、当該台板の上に前記フランジ部が添え付けられており、
    　前記可変機構により前記フランジ部の位置を上げた後の隙間にスペーサを設ける、請求項６に記載の回転機械の支持方法。     In the rotary machine, a base plate horizontally arranged on the foundation is fixed, and the flange portion is attached on the base plate.
    The method for supporting a rotating machine according to claim 6, wherein a spacer is provided in the gap after the position of the flange portion is raised by the variable mechanism.
  8. 　請求項１から５のいずれか１項に記載の支持装置を備える、回転機械。 A rotating machine provided with the support device according to any one of claims 1 to 5.
PCT/JP2020/044093 2020-01-22 2020-11-26 Rotating machine support device, support method, and rotating machine WO2021149351A1 (en)

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