WO2022102556A1 - 回転機械の監視装置、監視プログラム及び監視方法並びに回転機械設備 - Google Patents
回転機械の監視装置、監視プログラム及び監視方法並びに回転機械設備 Download PDFInfo
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- WO2022102556A1 WO2022102556A1 PCT/JP2021/040927 JP2021040927W WO2022102556A1 WO 2022102556 A1 WO2022102556 A1 WO 2022102556A1 JP 2021040927 W JP2021040927 W JP 2021040927W WO 2022102556 A1 WO2022102556 A1 WO 2022102556A1
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- Prior art keywords
- rotating
- vehicle interior
- predicted value
- monitoring
- clearance
- Prior art date
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 28
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- 238000012545 processing Methods 0.000 description 12
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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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/04—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
- F01D11/06—Control thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
- F01D11/14—Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing
- F01D11/20—Actively adjusting tip-clearance
- F01D11/24—Actively adjusting tip-clearance by selectively cooling-heating stator or rotor components
-
- 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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
-
- 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
- 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
- F05D2260/00—Function
- F05D2260/80—Diagnostics
-
- 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
- F05D2260/00—Function
- F05D2260/82—Forecasts
-
- 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
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/305—Tolerances
-
- 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
- F05D2270/00—Control
- F05D2270/70—Type of control algorithm
- F05D2270/71—Type of control algorithm synthesized, i.e. parameter computed by a mathematical model
-
- 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
- F05D2270/00—Control
- F05D2270/80—Devices generating input signals, e.g. transducers, sensors, cameras or strain gauges
- F05D2270/821—Displacement measuring means, e.g. inductive
Definitions
- the present disclosure relates to a rotating machine monitoring device, a monitoring program and a monitoring method, and a rotating machine equipment.
- Patent Document 1 discloses a rubbing maintenance device including gap sensors provided at four locations on the outer periphery of the rotor in the ground portion of the steam turbine.
- the minimum radial clearance at the installation position (ground part) of the gap sensor is calculated based on the detection result by the gap sensor, and the contact between the rotor and the stationary part at the ground part is calculated using this calculation result. It is designed to be monitored.
- the clearance between the rotating part and the stationary part in the vehicle interior (hereinafter, also referred to as an internal clearance) is monitored. Is desired.
- the internal clearance can be measured by using the clearance sensor provided inside the passenger compartment.
- the clearance sensor provided inside the passenger compartment.
- it is necessary to open the passenger compartment each time for the installation and maintenance of the clearance sensor which increases the cost for the installation and maintenance.
- the interior of the vehicle is in a high-temperature and high-pressure environment, and the clearance sensor is likely to malfunction, making it impossible to properly monitor the clearance.
- At least one embodiment of the present invention is a rotating machine monitoring device and monitoring program capable of achieving both easy installation and management of sensors and appropriate monitoring of the internal clearance of the rotating machine. And to provide monitoring methods and rotary machinery equipment.
- the monitoring device for a rotating machine is A monitoring device for monitoring the clearance of a rotating machine including a passenger compartment that houses a rotating part and a stationary part. At least one position sensor provided outside the vehicle interior and for detecting the radial position of the vehicle interior with respect to the rotating portion, and A predictor configured to obtain a predicted value of the internal clearance between the rotating part and the stationary part in the vehicle interior based on the measured value detected by the at least one position sensor. To prepare for.
- the rotary machine equipment is Rotating machines, including a vehicle compartment that houses rotating and stationary parts, The above-mentioned monitoring device for monitoring the clearance of the rotating machine, and To prepare for.
- the monitoring program for the rotating machine is provided.
- a monitoring program for monitoring the clearance of rotating machinery including the passenger compartment that houses rotating and stationary parts.
- On the computer A procedure for receiving a signal indicating a measured value of the radial position of the vehicle interior with respect to the rotating portion detected by a position sensor provided outside the vehicle interior, and a procedure for receiving the signal.
- a procedure for obtaining a predicted value of the internal clearance between the rotating portion and the stationary portion in the vehicle interior based on the measured value, and a procedure for obtaining the predicted value. Is configured to execute.
- a monitoring method for monitoring the clearance of a rotating machine including a passenger compartment that houses a rotating part and a stationary part.
- a rotating machine monitoring device a monitoring program and a monitoring method, and a rotation capable of achieving both easy installation and management of a sensor and appropriate monitoring of the internal clearance of the rotating machine.
- Mechanical equipment is provided.
- FIG. 3 is a schematic cross-sectional view of the steam turbine shown in FIG. It is a partially enlarged view of FIG. It is a partial sectional view of the steam turbine which concerns on another embodiment.
- FIG. 3 is a schematic block diagram of the monitoring / control device which concerns on one Embodiment. It is a flowchart of the monitoring / control method of the rotary machine which concerns on one Embodiment.
- the rotary machine constituting the rotary machine equipment is a steam turbine
- the rotary machine in the present invention is not limited to the steam turbine, and other rotary machines (for example, a gas turbine) are described. Etc.).
- FIG. 1 is a schematic view of a rotary machine facility including a steam turbine according to an embodiment
- FIG. 2 is a schematic cross-sectional view of the steam turbine shown in FIG. 3A and 3B are schematic cross-sectional views of the axial end portion of the vehicle interior of the steam turbine constituting the rotary mechanical equipment according to the embodiment, respectively.
- 3A is a partially enlarged view of FIG. 2
- FIG. 3B is a schematic cross-sectional view of a steam turbine according to another embodiment.
- FIG. 4 is a schematic configuration diagram of a monitoring / control device according to an embodiment.
- the rotary machine equipment 100 is for monitoring and / or controlling the clearance between the steam turbine (rotary machine) 1 (see FIGS. 1 to 3B) and the rotating portion and the stationary portion of the steam turbine 1.
- the monitoring / control device 90 (see FIG. 4) is provided.
- the steam turbine 1 includes a rotor 12 (not shown in FIG. 1) that can rotate around a central axis O, and an outer wheel that houses a rotating portion and a stationary portion including the rotor 12. It is provided with a room (vehicle room) 2.
- the outer passenger compartment 2 is configured to partition a space having an atmospheric pressure from a space having a higher pressure or a lower pressure than the atmospheric pressure.
- the outer casing 2 includes the upper half 2A of the passenger compartment located on the upper side in the vertical direction (that is, the vertical direction) and the lower half portion 2B of the passenger compartment located on the lower side, and is provided in the upper half portion 2A of the passenger compartment.
- the upper flange portion 3A and the lower flange portion 3B provided in the lower half portion 2B of the passenger compartment are fastened by bolts (not shown).
- the outer passenger compartment 2 is supported by the passenger compartment support portion 8 fixed to the foundation 10.
- the upper half portion 2A of the vehicle interior has a clawfoot portion 4 projecting in the axial direction (direction of the central axis O of the rotor), and is supported by the vehicle interior support portion 8 via the clawfoot portion 4. It has become so.
- the upper half portion 2A of the passenger compartment is provided with a pair of clawfoot portions 4 on both sides of the central axis O in a plan view at both ends in the axial direction. , A total of four clawfoot parts 4 are provided.
- the rotating portion housed in the outer casing 2 is provided on the rotor 12 rotatably supported by bearings (not shown) and on the rotor 12 so as to project radially from the rotor 12. Includes a plurality of blades 14.
- the rotor 12 is provided so as to penetrate the outer casing 2.
- the rotor 12 is provided with a plurality of stages of rotor blades 14 located apart from each other in the axial direction.
- the stationary portion housed in the outer casing 2 includes an inner casing 16 supported by the outer casing 2, a wing ring 18, a stationary wing 19, and a dummy supported by the inner casing 16. It includes a ring 20 and inner ground portions 22 provided at both ends of the outer casing 2 in the axial direction.
- the stationary blade 19 is supported by the inner casing 16 via the blade ring 18, and is provided so as to be located on the upstream side of the moving blade 14 of each stage in the axial direction.
- the radial clearance between the rotating portion and the stationary portion inside the outer casing 2 (cabin) is referred to as an internal clearance.
- the internal clearance is, for example, the clearance between the tip of the rotor blade 14 and the blade ring 18, the clearance between the rotor 12 and the tip of the stationary blade 19, or the seal fin provided on the rotor 12 and the dummy ring 20. Clearance between (not shown).
- An outer ground portion 24 is provided to suppress the intrusion of the water.
- the outer gland portion 24 is attached to the axial end surface 2a of the outer casing 2 so that the open portion of the axial end of the outer casing 2 is closed.
- the outer gland portion 24 includes a steam chamber 26 to which gland steam is supplied, and a gland packing 28 provided facing the rotor 12.
- the rotary machine equipment 100 includes a temperature control unit 60 for heating or cooling at least a part of the outer casing 2 or the chassis support portion 8.
- a temperature control unit 60 for heating or cooling at least a part of the outer casing 2 or the chassis support portion 8.
- the amount of heat expansion of the outer passenger compartment 2 or the passenger compartment support portion 8 can be adjusted, whereby the amount of heat expansion can be adjusted.
- the shape or position of the outer passenger compartment 2 can be adjusted. Therefore, the internal clearance of the steam turbine 1 can be maintained within an appropriate range by appropriately adjusting the shape or position of the outer casing 2 by the temperature control unit 60.
- the temperature control unit 60 includes a heating unit 62 for heating the vehicle interior support portion 8 that supports the outer casing 2 and a clawfoot portion 4 of the outer casing 2.
- a cooling unit 64 for cooling is included.
- the heat is extended in the vertical direction of the vehicle interior support portion 8, and the position of the outer passenger compartment 2 is changed so that the outer casing 2 is lifted.
- the clawfoot portion 4 with the cooling portion the outer casing 2 is deformed so that the outer casing 2 sinks.
- the heating unit 62 may be a heater configured to generate heat using electric energy.
- the heating section 62 includes a panel-shaped heater provided on the surface of the vehicle interior support section 8 that supports the clawfoot section 4.
- the cooling unit 64 may be configured to supply a cooling fluid to the clawfoot unit 4.
- the cooling section 64 includes a nozzle configured to eject air as a cooling fluid toward the clawfoot section 4.
- the monitoring / control device (monitoring device) 90 includes at least one position sensor 30 provided outside the outer passenger compartment, and a processing unit 50 for receiving and processing a signal from the position sensor 30.
- the monitoring / control device 90 may further include a state quantity sensor 40 (not shown in FIGS. 1 to 3B) for measuring a state quantity indicating the state of the steam turbine 1.
- the position sensor 30 is configured to detect the radial relative position of the outer casing 2 with respect to the rotating portion of the steam turbine 1 at a position outside the outer casing 2.
- the temperature at an external position (that is, a position near the outer ground portion 24) of the outer passenger compartment 2 in which the position sensor 30 is provided is about 100 ° C.
- the inside of the outer casing 2 is generally about 300 ° C. to 500 ° C., which is a relatively high temperature. Further, since the outer ground portion 24 is cooled by the ground steam, the temperature outside the outer casing 2 is relatively constant.
- the position sensor 30 may be provided in contact with atmospheric pressure, for example, as shown in FIG. 3A.
- the position sensor 30 is supported by a member attached to the outer casing 2 or the outer casing 2 and is located outside the outer casing 2. It is provided so as to face the rotor 12.
- the position sensor 30 is provided outside the outer ground portion 24 and is supported by the outer ground portion 24 via the support member 32. In this case, the position sensor 30 is in contact with the atmospheric pressure.
- the position sensor 30 is provided in the outer gland portion 24 and is supported by the outer gland portion 24 via the support member 32. In this case, the position sensor 30 is in contact with the pressure between the ground vapor pressure and the atmospheric pressure.
- the position sensor 30 is configured to detect the distance G (see FIGS. 3A and 3B) between the position sensor 30 and the rotor 12 facing the position sensor 30 in the radial direction. In this way, the radial relative position of the outer casing 2 with respect to the rotor 12 (rotating portion) at the mounting position of the position sensor 30 (the position outside the outer casing 2) is detected.
- the position sensor 30 may be a non-contact type gap sensor, for example, an eddy current type sensor, a capacitance type sensor, or an optical type sensor.
- the surface of the rotor 12 facing the position sensor 30 has the same diameter over the entire circumferential direction of the rotor 12. Further, in one embodiment, the diameter of the rotor 12 facing the position sensor 30 is the same as the diameter of the rotor 12 in the outer ground portion 24.
- the above-mentioned relative position (or distance G) detected by the position sensor 30 will be referred to as an external clearance for convenience.
- At least one position sensor 30 has an upper sensor 30A for detecting the above-mentioned relative position (external clearance) at the top of the rotor 12 and the above-mentioned at the bottom of the rotor 12. Includes a lower sensor 30B for detecting the relative position (external clearance) of.
- the prediction unit 54 process described later will be used. It is possible to improve the prediction accuracy of the internal clearance predicted in the part 50).
- At least one position sensor 30 includes a pair of position sensors 30 provided on both sides of the outer casing 2 in the axial direction.
- the at least one position sensor 30 includes a pair of upper sensors 30A and a pair of lower sensors 30B provided on both sides of the outer casing 2 in the axial direction.
- the detection result of the state quantity by the state quantity sensor 40 is used for calculating the predicted value of the internal clearance in the prediction unit 54 (processing unit 50) described later.
- the state amount sensor 40 is, for example, a temperature sensor for measuring the inlet steam temperature of the steam turbine 1, a pressure sensor for measuring the inlet pressure, a temperature sensor for measuring the outlet steam temperature, and a temperature sensor for measuring the outlet pressure.
- the processing unit 50 is configured to receive and process signals from the position sensor 30 and / or the state quantity sensor 40. As shown in FIG. 4, the processing unit 50 includes a sensor data acquisition unit 52, a prediction unit 54, a determination unit 56, and a control unit 58.
- the sensor data acquisition unit 52 is configured to receive signals indicating measured values by each sensor from the position sensor 30 and / or the state quantity sensor 40.
- the prediction unit 54 obtains a predicted value of the internal clearance between the rotating portion and the stationary portion in the outer passenger compartment 2 based on the measured value (signal received by the sensor data acquisition unit 52) detected by the position sensor 30. It is configured as follows.
- the determination unit 56 is configured to determine whether or not the shape or position of the outer passenger compartment 2 needs to be changed based on the predicted value of the internal clearance by the prediction unit 54.
- the control unit 58 changes the shape or position of the outer casing 2 so that the internal clearance is within the specified range. It is configured to do.
- the control unit 58 may be configured to control the temperature control unit 60 so that the above-mentioned internal clearance is within the specified range, for example.
- the processing unit 50 includes a processor (CPU or the like), a storage device (memory device; RAM or the like), an auxiliary storage unit, an interface, or the like.
- the processing unit 50 receives signals from the position sensor 30 and / or the state quantity sensor 40 described above via the interface.
- the processor is configured to process the signal thus received.
- the processor is configured to process the program deployed in the storage device. As a result, the functions of the above-mentioned functional units (prediction unit 54, etc.) are realized.
- the processing content in the processing unit 50 is implemented as a program executed by the processor.
- the program may be stored in the auxiliary storage unit. When the programs are executed, these programs are expanded in the storage device.
- the processor reads the program from the storage device and executes the instructions contained in the program.
- the position sensor 30 for detecting the radial position of the vehicle interior with respect to the rotating portion outside the outer casing 2 of the steam turbine (rotating machine) 1. Therefore, it is possible to facilitate the installation and management of the position sensor 30 as compared with the case where the position sensor is provided in the outer passenger compartment 2. That is, the position sensor 30 can be installed / replaced and the accuracy of the position sensor 30 can be confirmed without opening the outer passenger compartment 2. Further, as compared with the case where the position sensor is provided inside the outer casing 2 in the high temperature and high pressure environment, the position sensor 30 is less likely to malfunction.
- the monitoring / control device (monitoring device) 90 having the above configuration, the predicted value of the internal clearance of the steam turbine 1 is obtained based on the detection result of the above-mentioned relative position (external clearance) by the position sensor 30. , The internal clearance of the steam turbine 1 can be appropriately monitored based on the predicted value. Thereby, for example, the contact between the rotating portion and the stationary portion can be effectively suppressed. Therefore, according to the above-mentioned monitoring / control device (monitoring device) 90, it is possible to achieve both easy installation and management of the position sensor 30 and appropriate monitoring of the internal clearance of the steam turbine 1.
- FIG. 5 is a flowchart of the monitoring / control method of the rotating machine according to the embodiment.
- the position sensor 30 described above is used to measure the relative position (external clearance) in the radial direction of the outer casing 2 with respect to the rotating portion of the steam turbine 1 (S102).
- the state quantity indicating the state of the steam turbine 1 is acquired by using the state quantity sensor 40 described above (S104).
- the state quantity is, for example, the inlet steam temperature of the steam turbine 1, the inlet pressure, the outlet steam temperature, the outlet pressure, the number of rotations of the rotor 12, the surface temperature of the rotor 12, or the passenger compartment (outer passenger compartment 2, etc.). Contains at least one of the temperatures of.
- steps S102 and S104 are not limited. That is, steps S102 and S104 may be performed in any order, or steps S102 and S104 may be performed at the same time.
- the prediction unit 54 calculates the predicted value of the internal clearance between the rotating portion and the stationary portion in the outer passenger compartment 2 based on the measured value of the external clearance obtained in step S102 (S106).
- the above-mentioned predicted value of the internal clearance may be calculated based on the measured value of the external clearance obtained in step S102 and the measured value of the state quantity obtained in step S104.
- step S106 the predicted value of the internal clearance at each of the plurality of positions in the circumferential direction may be calculated. For example, the predicted value of the internal clearance at the top of the rotor 12 and / or the predicted value of the internal clearance at the bottom of the rotor 12 may be acquired.
- the predicted value of the internal clearance at each of the plurality of positions in the axial direction may be calculated.
- the predicted value of the clearance between each of the plurality of seal fins provided on the ring 20 and the rotor 12 may be calculated respectively.
- the determination unit 56 determines whether or not the shape or position of the outer passenger compartment 2 needs to be changed based on the predicted value of the internal clearance obtained in step S106 (S108).
- step S108 for example, when the predicted value of the internal clearance is within the specified range (within the appropriate range), it is determined that it is not necessary to change the shape or position of the outer passenger compartment 2 (Yes in S108). In this case, this flow ends as it is. On the other hand, when the predicted value of the internal clearance is out of the specified range (outside the appropriate range), it is determined that it is necessary to change the shape or position of the outer passenger compartment 2 (No in S108). In this case, the process proceeds to step S110.
- step S110 the shape or position of the outer passenger compartment 2 is changed so that the internal clearance is within the specified range.
- the temperature control unit 60 heating unit 62 and cooling unit 64
- the control unit 58 may be appropriately controlled by the control unit 58 so that the outer casing 2 has a desired shape or position.
- step S108 when it is determined that the predicted value of the internal clearance at the uppermost portion of the rotor 12 is smaller than the specified range, in step S110, the vehicle interior support portion 8 is heated by the heating portion 62 to obtain the vehicle.
- the position of the outer casing 2 may be changed so as to lift the outer casing 2 by adjusting the amount of heat expansion of the chamber support portion 8.
- the cooling unit 64 supplies the cooling fluid to the clawfoot portion 4.
- the outer passenger compartment 2 may be deformed so as to sink.
- steps S102 to S110 may be repeated until the predicted value of the internal clearance is within the specified range.
- step S106 for example, the predicted value of the internal clearance may be acquired by using the measured value of the external clearance by the method described below.
- the predicted value of the internal clearance may be acquired by a simple estimation based on the state quantity of the steam turbine 1.
- a provisional predicted value (tentative prediction) of the internal clearance and the external clearance is performed by a simple estimation using an estimation formula or the like acquired in advance. Value) is calculated.
- the above estimation formula is a formula expressing the relationship between the state quantity of the steam turbine 1 and the internal / external clearance.
- the predicted value of the internal clearance is acquired by correcting the provisional predicted value of the internal clearance described above.
- the predicted value of the internal clearance may be obtained by acquiring the difference between the measured value of the external clearance and the provisional predicted value of the external clearance and adding this difference to the provisional predicted value of the internal clearance described above. ..
- step S106 a numerical analysis by the finite element method (Finite Element Method; FEM) or an analysis method (Model Order Reduction; MOR) that simplifies the model of the finite element method is used to acquire the predicted value of the internal clearance.
- FEM Finite Element Method
- MOR Model Order Reduction
- the measured value of the state quantity of the steam turbine 1 acquired in step S104 is input (boundary condition), and the provisional predicted value (tentative predicted value) of the internal clearance and the external clearance is used by the FEM or MOR method. Is calculated.
- the predicted value of the internal clearance is acquired by correcting the provisional predicted value of the internal clearance described above.
- the predicted value of the internal clearance may be obtained by acquiring the difference between the measured value of the external clearance and the provisional predicted value of the external clearance and adding this difference to the provisional predicted value of the internal clearance described above. ..
- the predicted value of the internal clearance may be acquired by using a prediction model by analysis using AI (artificial intelligence) such as machine learning.
- AI artificial intelligence
- This prediction model is a prediction model in which the state quantity of the steam turbine 1 and the external clearance are input and the internal clearance of the steam turbine 1 is output.
- the measured value of the external clearance acquired in step S102 and the measured value of the state quantity of the steam turbine 1 acquired in step S104 are used as inputs of the above-mentioned prediction model, and the calculation result using the prediction model is used.
- the predicted value of the internal clearance is acquired.
- the above-mentioned prediction model may be a trained prediction model that has already been machine-learned using the teacher data.
- the monitoring device (for example, the above-mentioned monitoring / control device 90) of the rotary machine (for example, the above-mentioned steam turbine 1) is A monitoring device for monitoring the clearance of a rotating machine including a vehicle compartment (for example, the outer vehicle compartment 2 described above) that houses a rotating portion and a stationary portion. At least one position sensor (30) provided outside the vehicle interior and for detecting the radial position of the vehicle interior with respect to the rotating portion, and A prediction unit (54) configured to obtain a predicted value of the internal clearance between the rotating portion and the stationary portion in the vehicle interior based on the measured value detected by the at least one position sensor. To prepare for.
- a vehicle compartment for example, the outer vehicle compartment 2 described above
- At least one position sensor (30) provided outside the vehicle interior and for detecting the radial position of the vehicle interior with respect to the rotating portion
- a prediction unit (54) configured to obtain a predicted value of the internal clearance between the rotating portion and the stationary portion in the vehicle interior based on the measured value detected by the at least one position
- the position sensor for detecting the relative position in the radial direction of the vehicle interior with respect to the rotating portion is provided outside the vehicle interior of the rotating machine, the position sensor is provided in the vehicle interior as compared with the case where the position sensor is provided.
- the position sensor can be easily installed and managed.
- the internal clearance of the rotating machine is appropriate based on the predicted value. Can be monitored. Thereby, for example, the contact between the rotating portion and the stationary portion can be effectively suppressed. Therefore, according to the configuration of (1) above, it is possible to achieve both easy installation and management of the position sensor and appropriate monitoring of the internal clearance of the rotating machine.
- the rotary machine in the configuration of (1) above, includes an outer ground portion provided at an axial end portion of the passenger compartment.
- the position sensor is supported by the outer ground portion.
- the at least one position sensor includes a pair of position sensors provided on both sides of the vehicle interior in the axial direction.
- the internal clearance can be predicted more appropriately as compared with the case where the position sensors are provided on only one side of the vehicle interior. can do.
- the prediction unit is configured to calculate the predicted value of the internal clearance based on the state quantity indicating the state of the rotating machine and the measured value obtained by the position sensor.
- the predicted value of the internal clearance can be appropriately calculated based on the state quantity indicating the state of the rotating machine and the measured value acquired by the position sensor. Therefore, the internal clearance of the rotating machine can be appropriately monitored based on the calculated predicted value.
- the prediction unit is configured to calculate the predicted value of the internal clearance using a state quantity indicating the state of the rotating machine and a prediction model inputting the measured value obtained by the position sensor. To.
- the predicted value of the internal clearance is appropriately calculated by using the state quantity indicating the state of the rotating machine and the prediction model in which the measured value acquired by the position sensor is input. Can be done. Therefore, the internal clearance of the rotating machine can be appropriately monitored based on the calculated predicted value.
- the prediction unit calculates a provisional predicted value of the internal clearance and a provisional predicted value of the relative position from a state quantity indicating the state of the rotating machine, and the measured value acquired by the position sensor and the relative position. By adding the difference from the provisional predicted value to the provisional predicted value of the internal clearance, the predicted value of the internal clearance is acquired.
- the difference between the measured value of the radial position (that is, the external clearance) of the vehicle interior with respect to the rotating part and the provisional predicted value is added to the provisional predicted value of the internal clearance to be internal. Since the predicted value of the clearance is acquired, the predicted value of the internal clearance can be appropriately calculated. Therefore, the internal clearance of the rotating machine can be appropriately monitored based on the calculated predicted value.
- the monitoring device for the rotating machine is A determination unit (56) configured to determine whether or not the shape or position of the passenger compartment needs to be changed is provided based on the predicted value of the internal clearance.
- the configuration of (7) above it is possible to appropriately determine whether or not the shape or position of the passenger compartment needs to be changed based on the predicted value of the internal clearance. For example, when the predicted value of the internal clearance is out of the specified range, it can be determined that there is a change in the shape or position of the vehicle interior. Therefore, by appropriately changing the shape or position of the vehicle interior based on this determination result, the contact between the rotating portion and the stationary portion can be effectively suppressed.
- the rotary machine equipment (100) is A rotating machine (for example, the steam turbine 1 described above) including a vehicle compartment accommodating a rotating part and a stationary part, and the like.
- the monitoring device according to any one of (1) to (7) above for monitoring the clearance of the rotating machine (for example, the above-mentioned monitoring / control device 90) and To prepare for.
- the position sensor for detecting the relative position in the radial direction of the vehicle interior with respect to the rotating portion is provided outside the vehicle interior of the rotating machine, the position sensor is provided in the vehicle interior as compared with the case where the position sensor is provided.
- the position sensor can be easily installed and managed.
- the internal clearance of the rotating machine is appropriate based on the predicted value. Can be monitored. Thereby, for example, the contact between the rotating portion and the stationary portion can be effectively suppressed. Therefore, according to the configuration of (8) above, it is possible to achieve both easy installation and management of the position sensor and appropriate monitoring of the internal clearance of the rotating machine.
- the monitoring device includes a determination unit (56) configured to determine whether or not the shape or position of the vehicle interior needs to be changed based on the predicted value of the internal clearance.
- the rotary machine equipment When the determination unit determines that it is necessary to change the shape or position of the passenger compartment, the shape or position of the passenger compartment is changed so that the internal clearance is within the specified range.
- a control unit (58) is provided.
- the control unit determines that the shape or position of the vehicle interior is within the specified range.
- the position can be changed. Therefore, by appropriately changing the shape or position of the vehicle interior based on the determination result of the determination unit, the contact between the rotating portion and the stationary portion can be effectively suppressed.
- the control unit includes a temperature control unit (60) for heating or cooling at least a part of the vehicle interior or the vehicle interior support unit that supports the vehicle interior so that the internal clearance is within the specified range. Configured to control.
- the temperature control unit when the determination unit determines that it is necessary to change the shape or position of the vehicle interior, the temperature control unit is controlled so that the internal clearance is within the specified range. At least part of the chamber is heated or cooled. Therefore, the contact between the rotating portion and the stationary portion can be effectively suppressed.
- the monitoring program of the rotating machine (for example, the steam turbine 1 described above) according to at least one embodiment of the present invention is provided.
- a monitoring program for monitoring the clearance of a rotating machine including a vehicle compartment (for example, the outer compartment 2 described above) that houses a rotating portion and a stationary portion.
- a computer for example, the processing unit 50 described above
- a procedure for obtaining a predicted value of the internal clearance between the rotating portion and the stationary portion in the vehicle interior based on the measured value, and a procedure for obtaining the predicted value. Is configured to execute.
- the position sensor for detecting the relative position in the radial direction of the vehicle interior with respect to the rotating portion is provided outside the vehicle interior of the rotating machine, the position sensor is provided in the vehicle interior as compared with the case where the position sensor is provided.
- the position sensor can be easily installed and managed.
- the predicted value of the internal clearance of the rotating machine is obtained based on the above-mentioned relative position detection result by the position sensor. Therefore, the internal clearance of the rotating machine is appropriately adjusted based on the predicted value. Can be monitored. Thereby, for example, the contact between the rotating portion and the stationary portion can be effectively suppressed. Therefore, according to the program of (11) above, it is possible to achieve both easy installation and management of the position sensor and appropriate monitoring of the internal clearance of the rotating machine.
- the monitoring method of the rotary machine (for example, the steam turbine 1 described above) according to at least one embodiment of the present invention is It is a monitoring method for monitoring the clearance of a rotating machine including a vehicle compartment (for example, the outer vehicle compartment 2 described above) that houses a rotating portion and a stationary portion.
- the position sensor for detecting the relative position in the radial direction of the vehicle interior with respect to the rotating portion is provided outside the vehicle interior of the rotating machine, the position sensor is provided in the vehicle interior as compared with the case where the position sensor is provided.
- the position sensor can be easily installed and managed.
- the predicted value of the internal clearance of the rotating machine is obtained based on the above-mentioned relative position detection result by the position sensor, so that the internal clearance of the rotating machine is appropriate based on the predicted value. Can be monitored. Thereby, for example, the contact between the rotating portion and the stationary portion can be effectively suppressed. Therefore, according to the method (12) above, it is possible to achieve both easy installation and management of the position sensor and appropriate monitoring of the internal clearance of the rotating machine.
- the present invention is not limited to the above-described embodiments, and includes a modified form of the above-described embodiments and a combination of these embodiments as appropriate.
- an expression representing a relative or absolute arrangement such as “in a certain direction”, “along a certain direction”, “parallel”, “orthogonal”, “center”, “concentric” or “coaxial”. Strictly represents not only such an arrangement, but also a tolerance or a state of relative displacement at an angle or distance to the extent that the same function can be obtained.
- expressions such as “same”, “equal”, and “homogeneous” that indicate that things are in the same state not only represent exactly the same state, but also have tolerances or differences to the extent that the same function can be obtained. It shall also represent the existing state.
- the expression representing a shape such as a square shape or a cylindrical shape not only represents a shape such as a square shape or a cylindrical shape in a geometrically strict sense, but also within a range in which the same effect can be obtained.
- the shape including the uneven portion, the chamfered portion, etc. shall also be represented.
- the expression “comprising”, “including”, or “having” one component is not an exclusive expression excluding the existence of another component.
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Abstract
Description
本願は、2020年11月10日に日本国特許庁に出願された特願2020-186961号に基づき優先権を主張し、その内容をここに援用する。
回転部および静止部を収容する車室を含む回転機械のクリアランスを監視するための監視装置であって、
前記車室外に設けられ、前記回転部に対する前記車室の径方向における相対位置を検出するための少なくとも1つの位置センサと、
前記少なくとも1つの位置センサによって検出された計測値に基づいて、前記車室内における前記回転部と前記静止部との間の内部クリアランスの予測値を得るように構成された予測部と、
を備える。
回転部および静止部を収容する車室を含む回転機械と、
前記回転機械のクリアランスを監視するための上述の監視装置と、
を備える。
回転部および静止部を収容する車室を含む回転機械のクリアランスを監視するための監視プログラムであって、
コンピュータに、
前記車室外に設けられた位置センサにより検出された、前記回転部に対する前記車室の径方向における相対位置の計測値を示す信号を受け取る手順と、
前記計測値に基づいて、前記車室内における前記回転部と前記静止部との間の内部クリアランスの予測値を得る手順と、
を実行させるように構成される。
回転部および静止部を収容する車室を含む回転機械のクリアランスを監視するための監視方法であって、
前記車室外に設けられた位置センサを用いて、前記回転部に対する前記車室の径方向における相対位置を検出するステップと、
前記位置センサによって検出された計測値に基づいて、前記車室内における前記回転部と前記静止部との間の内部クリアランスの予測値を得るステップと、
を備える。
図1は、一実施形態に係る蒸気タービンを含む回転機械設備の概略図であり、図2は、図1に示す蒸気タービンの概略断面図である。図3A及び図3Bは、それぞれ、一実施形態に係る回転機械設備を構成する蒸気タービンの車室の軸方向端部の概略断面図である。なお、図3Aは図2の部分的な拡大図であり、図3Bは他の一実施形態に係る蒸気タービンの概略断面図である。図4は、一実施形態に係る監視/制御装置の概略構成図である。
図1及び図2に示すように、蒸気タービン1は、中心軸Oの周りを回転可能なロータ12(図1においては不図示)と、ロータ12を含む回転部及び静止部を収容する外側車室(車室)2とを備える。
監視/制御装置(監視装置)90は、外側車室の外部に設けられる少なくとも1つの位置センサ30と、位置センサ30からの信号を受け取って処理するための処理部50と、を含む。監視/制御装置90は、さらに、蒸気タービン1の状態を示す状態量を計測するための状態量センサ40(図1~図3Bにおいて不図示)を含んでもよい。
次に、幾つかの実施形態に係る蒸気タービン(回転機械)1の監視/制御方法のフローについて説明する。なお、以下においては、上述の監視/制御装置90を用いて回転機械の監視/制御を行う場合について説明するが、以下に説明する手順の一部又は全部を手動で行ってもよい。
ステップS106では、例えば、以下に述べる手法により、外部クリアランスの計測値を用いて、内部クリアランスの予測値を取得するようにしてもよい。
回転部および静止部を収容する車室(例えば上述の外側車室2)を含む回転機械のクリアランスを監視するための監視装置であって、
前記車室外に設けられ、前記回転部に対する前記車室の径方向における相対位置を検出するための少なくとも1つの位置センサ(30)と、
前記少なくとも1つの位置センサによって検出された計測値に基づいて、前記車室内における前記回転部と前記静止部との間の内部クリアランスの予測値を得るように構成された予測部(54)と、
を備える。
前記回転機械は、前記車室の軸方向における端部に設けられるアウターグランド部を含み、
前記位置センサは、前記アウターグランド部に支持される。
前記少なくとも1つの位置センサは、軸方向にて前記車室の両側に設けられる一対の位置センサを含む。
前記予測部は、前記回転機械の状態を示す状態量、及び、前記位置センサにより得られる前記計測値に基づいて、前記内部クリアランスの前記予測値を算出するように構成される。
前記予測部は、前記回転機械の状態を示す状態量、及び、前記位置センサにより得られる前記計測値を入力とする予測モデルを用いて、前記内部クリアランスの前記予測値を算出するように構成される。
前記予測部は、前記回転機械の状態を示す状態量から前記内部クリアランスの暫定予測値及び前記相対位置の暫定予測値を算出し、前記位置センサにより取得される前記計測値と前記相対位置の前記暫定予測値との差分を前記内部クリアランスの前記暫定予測値に加算することで、前記内部クリアランスの前記予測値を取得するように構成される。
前記回転機械の監視装置は、
前記内部クリアランスの前記予測値に基づいて、前記車室の形状又は位置の変更要否を判定するように構成された判定部(56)を備える。
回転部および静止部を収容する車室を含む回転機械(例えば上述の蒸気タービン1)と、
前記回転機械のクリアランスを監視するための上記(1)乃至(7)の何れか一項に記載の監視装置(例えば上述の監視/制御装置90)と、
を備える。
前記監視装置は、前記内部クリアランスの前記予測値に基づいて、前記車室の形状又は位置の変更要否を判定するように構成された判定部(56)を含み、
前記回転機械設備は、
前記判定部により前記車室の形状又は位置の変更が必要であると判断されたとき、前記内部クリアランスが規定範囲内となるように、前記車室の形状又は位置を変更するように構成された制御部(58)を備える。
前記制御部は、前記内部クリアランスが規定範囲内となるように、前記車室又は前記車室を支持する車室支持部の少なくとも一部を加温又は冷却するための温度調節部(60)を制御するように構成される。
回転部および静止部を収容する車室(例えば上述の外側車室2)を含む回転機械のクリアランスを監視するための監視プログラムであって、
コンピュータ(例えば上述の処理部50)に、
前記車室外に設けられた位置センサにより検出された、前記回転部に対する前記車室の径方向における相対位置の計測値を示す信号を受け取る手順と、
前記計測値に基づいて、前記車室内における前記回転部と前記静止部との間の内部クリアランスの予測値を得る手順と、
を実行させるように構成される。
回転部および静止部を収容する車室(例えば上述の外側車室2)を含む回転機械のクリアランスを監視するための監視方法であって、
前記車室外に設けられた位置センサを用いて、前記回転部に対する前記車室の径方向における相対位置を検出するステップ(S102)と、
前記位置センサによって検出された計測値に基づいて、前記車室内における前記回転部と前記静止部との間の内部クリアランスの予測値を得るステップ(S106)と、
を備える。
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。
また、本明細書において、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。
また、本明細書において、一の構成要素を「備える」、「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。
2 外側車室
2A 車室上半部
2B 車室下半部
2a 軸方向端面
3A 上側フランジ部
3B 下側フランジ部
4 猫足部
8 車室支持部
10 基礎
12 ロータ
14 動翼
16 内側車室
18 翼環
19 静翼
20 ダミーリング
22 インナーグランド部
24 アウターグランド部
26 蒸気室
28 グランドパッキン
30 位置センサ
30A 上側センサ
30B 下側センサ
32 支持部材
40 状態量センサ
50 処理部
52 センサデータ取得部
54 予測部
56 判定部
58 制御部
60 温度調節部
62 加熱部
64 冷却部
90 監視/制御装置
100 回転機械設備
O 中心軸
Claims (12)
- 回転部および静止部を収容する車室を含む回転機械のクリアランスを監視するための監視装置であって、
前記車室外に設けられ、前記回転部に対する前記車室の径方向における相対位置を検出するための少なくとも1つの位置センサと、
前記少なくとも1つの位置センサによって検出された計測値に基づいて、前記車室内における前記回転部と前記静止部との間の内部クリアランスの予測値を得るように構成された予測部と、
を備える回転機械の監視装置。 - 前記回転機械は、前記車室の軸方向における端部に設けられるアウターグランド部を含み、
前記位置センサは、前記アウターグランド部に支持される
請求項1に記載の回転機械の監視装置。 - 前記少なくとも1つの位置センサは、軸方向にて前記車室の両側に設けられる一対の位置センサを含む
請求項1又は2に記載の回転機械の監視装置。 - 前記予測部は、前記回転機械の状態を示す状態量、及び、前記位置センサにより得られる前記計測値に基づいて、前記内部クリアランスの前記予測値を算出するように構成された
請求項1乃至3の何れか一項に記載の回転機械の監視装置。 - 前記予測部は、前記回転機械の状態を示す状態量、及び、前記位置センサにより得られる前記計測値を入力とする予測モデルを用いて、前記内部クリアランスの前記予測値を算出するように構成された
請求項1乃至3の何れか一項に記載の回転機械の監視装置。 - 前記予測部は、前記回転機械の状態を示す状態量から前記内部クリアランスの暫定予測値及び前記相対位置の暫定予測値を算出し、前記位置センサにより得られる前記計測値と前記相対位置の前記暫定予測値との差分を前記内部クリアランスの前記暫定予測値に加算することで、前記内部クリアランスの前記予測値を取得するように構成された
請求項4又は5に記載の回転機械の監視装置。 - 前記内部クリアランスの前記予測値に基づいて、前記車室の形状又は位置の変更要否を判定するように構成された判定部を備える
請求項1乃至6の何れか一項に記載の回転機械の監視装置。 - 回転部および静止部を収容する車室を含む回転機械と、
前記回転機械のクリアランスを監視するための請求項1乃至7の何れか一項に記載の監視装置と、
を備える回転機械設備。 - 前記監視装置は、前記内部クリアランスの前記予測値に基づいて、前記車室の形状又は位置の変更要否を判定するように構成された判定部を含み、
前記判定部により前記車室の形状又は位置の変更が必要であると判断されたとき、前記内部クリアランスが規定範囲内となるように、前記車室の形状又は位置を変更するように構成された制御部を備える
請求項8に記載の回転機械設備。 - 前記制御部は、前記内部クリアランスが規定範囲内となるように、前記車室又は前記車室を支持する車室支持部の少なくとも一部を加温又は冷却するための温度調節部を制御するように構成された
請求項9に記載の回転機械設備。 - 回転部および静止部を収容する車室を含む回転機械のクリアランスを監視するための監視プログラムであって、
コンピュータに、
前記車室外に設けられた位置センサにより検出された、前記回転部に対する前記車室の径方向における相対位置の計測値を示す信号を受け取る手順と、
前記計測値に基づいて、前記車室内における前記回転部と前記静止部との間の内部クリアランスの予測値を得る手順と、
を実行させるための回転機械の監視プログラム。 - 回転部および静止部を収容する車室を含む回転機械のクリアランスを監視するための監視方法であって、
前記車室外に設けられた位置センサを用いて、前記回転部に対する前記車室の径方向における相対位置を検出するステップと、
前記位置センサによって検出された計測値に基づいて、前記車室内における前記回転部と前記静止部との間の内部クリアランスの予測値を得るステップと、
を備える回転機械の監視方法。
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CN202180063339.4A CN116194657A (zh) | 2020-11-10 | 2021-11-08 | 旋转机械的监视装置、监视程序、监视方法以及旋转机械设备 |
US18/029,204 US20240026800A1 (en) | 2020-11-10 | 2021-11-08 | Monitoring device, computer-readable storage medium for storing monitoring program and monitoring method for rotary machine, and rotary machine equipment |
DE112021003960.1T DE112021003960T5 (de) | 2020-11-10 | 2021-11-08 | Überwachungsvorrichtung, überwachungsprogramm undüberwachungsverfahren für rotationsmaschine sowierotationsmaschinenausrüstung |
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JPH0754606A (ja) | 1993-08-16 | 1995-02-28 | Fuji Electric Co Ltd | 蒸気タービングランド部のラビング予防保全装置 |
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US20130315716A1 (en) * | 2012-05-22 | 2013-11-28 | General Electric Company | Turbomachine having clearance control capability and system therefor |
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JP2000027606A (ja) * | 1998-07-14 | 2000-01-25 | Mitsubishi Heavy Ind Ltd | ガスタービンクリアランスシミュレータシステム |
US20080069683A1 (en) * | 2006-09-15 | 2008-03-20 | Tagir Nigmatulin | Methods and systems for controlling gas turbine clearance |
JP2014040795A (ja) * | 2012-08-22 | 2014-03-06 | Mitsubishi Heavy Ind Ltd | 回転機械及びそのクリアランス調整方法 |
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