WO2023276370A1 - 静音装置、静音方法、およびプログラム - Google Patents
静音装置、静音方法、およびプログラム Download PDFInfo
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- WO2023276370A1 WO2023276370A1 PCT/JP2022/014914 JP2022014914W WO2023276370A1 WO 2023276370 A1 WO2023276370 A1 WO 2023276370A1 JP 2022014914 W JP2022014914 W JP 2022014914W WO 2023276370 A1 WO2023276370 A1 WO 2023276370A1
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- waveform
- exhaust duct
- target frequency
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- phase difference
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- 230000030279 gene silencing Effects 0.000 title abstract description 5
- 238000000034 method Methods 0.000 title description 13
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 238000012937 correction Methods 0.000 claims description 35
- 230000006870 function Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000012545 processing Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 3
- 230000003584 silencer Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000004549 pulsed laser deposition Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/30—Exhaust heads, chambers, or the like
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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
- F01D21/003—Arrangements for testing or measuring
-
- 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
- F02C7/24—Heat or noise insulation
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
- G10K11/17823—Reference signals, e.g. ambient acoustic environment
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
-
- 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
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
- F05D2260/962—Preventing, counteracting or reducing vibration or noise by means of "anti-noise"
Definitions
- TECHNICAL FIELD The present disclosure relates to a silent device, a silent method, and a program. This application claims priority to Japanese Patent Application No. 2021-108567 filed in Japan on June 30, 2021, the content of which is incorporated herein.
- a silencer is used in the exhaust path of a gas turbine to reduce noise generated by exhaust gas flowing through the exhaust path (see Patent Document 1, for example).
- Examples of the silencing method of such a silencer include a sound absorption type, a resonance type, an expansion type, and a compound type, and each silencing method is appropriately selected according to the characteristics of noise.
- the low-frequency sound generated in the exhaust path of the gas turbine (for example, the low-frequency sound generated at startup), it has been confirmed from the results of various measurements that the component of the combustion vibration is radiated to the duct machine side of the exhaust path. .
- the combustion oscillation which is the source of vibration, because it has the effect of deteriorating the performance of the gas turbine. Therefore, it is desired to suppress the component of the combustion vibration that is transmitted through the gas turbine exhaust system duct and radiated to the outside.
- the present disclosure has been made in view of such problems, and provides a silent device, a silent method, and a program capable of reducing low-frequency noise in an exhaust path of a gas turbine.
- a noise reduction device acquires a first waveform representing vibrations of an exhaust duct of a gas turbine based on a reference signal that detects vibrations at a first location of the exhaust duct.
- an unbalance motor that gives vibration of a specified target frequency to the exhaust duct at a second position of the exhaust duct; and a measurement signal that measures the rotation pulse of the unbalance motor.
- a second waveform acquisition unit that acquires a second waveform representing rotation of the balance motor; a setting unit that sets the target frequency based on the first waveform; and a correction unit that corrects the target frequency so as to obtain a phase difference.
- a silent method includes obtaining a first waveform representative of vibrations of an exhaust duct of a gas turbine based on a reference signal detecting vibrations at a first location of the exhaust duct; applying vibration of a specified target frequency to the exhaust duct by an unbalance motor provided at a second position of the exhaust duct; acquiring a second waveform representing rotation of an unbalanced motor; setting the target frequency based on the first waveform; and setting the first waveform and the second waveform to have a predetermined phase difference. and a step of correcting the target frequency.
- a program obtains a first waveform representing vibrations of an exhaust duct of a gas turbine based on a reference signal that detects vibrations at a first location of the exhaust duct; At a second position of the duct, a second waveform representing the rotation of the unbalanced motor is obtained based on a measurement signal obtained by measuring rotation pulses of the unbalanced motor that gives vibration of a specified target frequency to the exhaust duct. setting the target frequency based on the first waveform; and correcting the target frequency so that the first waveform and the second waveform have a predetermined phase difference. Let the computer in the quieter run.
- the silent device, silent method, and program according to the present disclosure it is possible to reduce low frequency noise in the exhaust path of a gas turbine.
- FIG. 1 is a diagram showing an overall configuration of gas turbine equipment according to an embodiment of the present disclosure
- FIG. 1 is a diagram showing a functional configuration of a silent device according to an embodiment of the present disclosure
- FIG. 6 is a flow chart showing an example of processing of a silent device according to an embodiment of the present disclosure
- 1 is a first diagram for explaining functions of a silent device according to an embodiment of the present disclosure
- FIG. 4 is a second diagram for explaining functions of a silent device according to an embodiment of the present disclosure
- FIG. It is a figure showing an example of hardware constitutions of a silent device concerning one embodiment of this indication.
- FIG. 1 A silent device 10 according to an embodiment of the present disclosure will be described below with reference to FIGS. 1 to 6.
- FIG. 1 A silent device 10 according to an embodiment of the present disclosure will be described below with reference to FIGS. 1 to 6.
- FIG. 1 A silent device 10 according to an embodiment of the present disclosure will be described below with reference to FIGS. 1 to 6.
- FIG. 1 is a diagram showing the overall configuration of gas turbine equipment according to an embodiment of the present disclosure.
- the gas turbine equipment 1 includes a gas turbine 20 , a heat recovery steam generator 21 (hereinafter also referred to as HRSG), an exhaust duct 22 , and a noise reduction device 10 .
- HRSG heat recovery steam generator
- the gas turbine 20 is installed in the turbine building 2.
- the gas turbine 20 is connected to the HRSG 21 via an exhaust duct 22 and supplies the generated exhaust gas G to the HRSG 21 .
- the HRSG 21 is installed outside the turbine building 2.
- the HRSG 21 uses the heat of the exhaust gas G from the gas turbine 20 to generate steam.
- the exhaust duct 22 connects the gas turbine 20 and the HRSG 21 outside the turbine building 2 .
- the exhaust duct 22 is an exhaust path through which the exhaust gas G discharged from the gas turbine 20 flows.
- the gas turbine 20 side of the exhaust duct 22 is also referred to as the "upstream side”
- the HRSG 21 side is also referred to as the "downstream side”.
- the silent device 10 is a device for suppressing the low frequency sound of the exhaust duct 22.
- the exhaust duct 22 may generate low-frequency sound due to vibration caused by radiation of combustion vibration components of the gas turbine 20 . Combustion oscillations occur, for example, when the gas turbine 20 is started.
- the silent device 10 periodically receives the vibration waveform (reference signal) of the exhaust duct 22 from the vibration sensor 23 provided on the wall surface of the exhaust duct 22 at the first position P1.
- the silent device 10 performs AVC (Active Vibration Control) based on the received reference signal to reduce vibration of the exhaust duct 22 and suppress generation of low frequency sound.
- AVC Active Vibration Control
- the silent device 10 includes an unbalanced motor 11 and a control device 12.
- the unbalance motor 11 is attached to the wall surface of the exhaust duct 22 at the second position P2.
- the second position P2 is a position downstream of the first position P1, as shown in FIG. 1, for example.
- the unbalance motor 11 has an unbalance weight attached to its rotary shaft, and rotates the rotary shaft under the control of the control device 12 to vibrate the wall surface of the exhaust duct 22 .
- the control device 12 measures the vibration of the exhaust duct 22 based on the reference signal of the vibration sensor 23, and controls the operation of the unbalance motor 11 so as to generate vibration that can reduce the vibration waveform.
- FIG. 2 is a diagram illustrating a functional configuration of a silent device according to an embodiment of the present disclosure
- the unbalanced motor 11 of the silent device 10 is supplied with electric power for driving via an inverter 13 .
- the control device 12 of the silent device 10 rotates the unbalance motor 11 at an arbitrary frequency (target frequency, which will be described later) by inverter control.
- the control device 12 also includes a first waveform acquisition section 120 , a second waveform acquisition section 121 , a setting section 122 and a correction section 123 .
- the first waveform acquisition unit 120 acquires the first waveform w1 representing the vibration of the exhaust duct 22 based on the reference signal of the vibration sensor 23.
- the second waveform acquisition unit 121 acquires the second waveform w2 representing the rotation of the unbalance motor 11 based on the measurement signal obtained by measuring the rotation pulse of the unbalance motor 11.
- the setting unit 122 acquires the vibration frequency of the exhaust duct 22 from the first waveform w1, and sets the target frequency of the unbalance motor 11 based on the vibration frequency.
- the correction unit 123 corrects the target frequency of the unbalance motor 11 so that the first waveform w1 and the second waveform w2 have a predetermined phase difference.
- the rotation frequency (second waveform w2) of the unbalance motor 11 approaches the opposite phase of the vibration frequency (first waveform w1) of the exhaust duct 22, the vibration of the exhaust duct 22 is canceled by the vibration given by the unbalance motor 11. become smaller. Therefore, correction unit 123 sets the predetermined phase difference to 180 degrees, for example. Note that the correction unit 123 may set the predetermined phase difference with a range such as 180 ⁇ degrees.
- the target frequency corrected by the correction unit 123 (corrected target frequency) is output to the inverter 13 .
- the inverter 13 outputs an AC voltage corresponding to the post-correction target frequency to the unbalance motor 11 to rotate the unbalance motor 11 at the post-correction target frequency. Note that the inverter 13 may be built in the unbalanced motor 11 .
- FIG. 3 is a flowchart illustrating an example of processing of a silent device according to an embodiment of the present disclosure
- FIG. 4 is a first diagram for explaining functions of a silent device according to an embodiment of the present disclosure.
- FIG. 5 is a second diagram for explaining the function of the silent device according to one embodiment of the present disclosure. Details of the processing of the silent device 10 will be described below with reference to FIGS. 3 to 5.
- FIG. 3 is a flowchart illustrating an example of processing of a silent device according to an embodiment of the present disclosure
- FIG. 4 is a first diagram for explaining functions of a silent device according to an embodiment of the present disclosure.
- FIG. 5 is a second diagram for explaining the function of the silent device according to one embodiment of the present disclosure. Details of the processing of the silent device 10 will be described below with reference to FIGS. 3 to 5.
- FIG. 3 is a flowchart illustrating an example of processing of a silent device according to an embodiment of the present disclosure
- FIG. 4 is a first diagram for explaining functions of
- the first waveform acquisition unit 120 of the control device 12 acquires the first waveform w1 representing the vibration of the exhaust duct 22 based on the reference signal received from the vibration sensor 23 (step S10). Specifically, the first waveform acquisition unit 120 removes unnecessary frequency band components such as noise from the reference signal using a bandpass filter (FIG. 2). Thereby, the first waveform acquisition unit 120 can acquire the first waveform w1, which is the waveform of the component related to the vibration of the exhaust duct 22, as shown in FIG.
- the setting unit 122 of the control device 12 sets the target frequency of the unbalance motor 11 based on the first waveform w1 (step S11). For example, the setting unit 122 sets the same value as the vibration frequency of the exhaust duct 22 as the target frequency.
- the second waveform acquisition unit 121 of the control device 12 acquires the second waveform w2 (FIG. 4) representing the rotation of the unbalance motor 11 based on the measurement signal (rotation pulse) received from the unbalance motor 11 (step S12).
- the correction unit 123 of the control device 12 determines whether the first waveform w1 and the second waveform w2 have a predetermined phase difference (step S13).
- the correction unit 123 sets the correction amount of the target frequency to is set to a predetermined value (step S15).
- the predetermined value is an arbitrary value designated by the manager or the like of the gas turbine equipment 1, and is 0.1 Hz, for example.
- step S13 when the first waveform w1 and the second waveform w2 have a predetermined phase difference (for example, the phase difference is within the range of 180 ⁇ degrees) (step S13: YES), the correction unit 123 sets the target frequency to A correction amount is set to zero (step S14).
- a predetermined phase difference for example, the phase difference is within the range of 180 ⁇ degrees
- the correction unit 123 corrects the target frequency with the set correction amount (step S16).
- the target frequency corrected by the correction unit 123 (corrected target frequency) is output to the inverter 13 .
- the inverter 13 outputs an AC voltage to the unbalance motor 11 so that the unbalance motor 11 rotates at the corrected target frequency.
- the control device 12 controls the unbalance motor 11 so as to reduce the vibration of the exhaust duct 22 by periodically executing the series of processes in FIG.
- the correction unit 123 rotates the unbalance motor 11 at the corrected frequency obtained by adding the correction amount (0.1 Hz) to the target frequency so as to obtain the second waveform w2 shifted from the target frequency by the correction amount. (Steps S15-S16). By repeatedly executing these processes, the control device 12 can correct the phase shift of the second waveform w2 and bring it closer to the opposite phase of the first waveform w1.
- the correction unit 123 sets the correction amount to zero, and rotates the unbalance motor 11 at the target frequency set by the setting unit 122 (steps S14 and S16).
- the unbalance motor 11 can reduce the vibration of the exhaust duct 22 by applying vibration having a phase opposite to the vibration of the exhaust duct 22 and canceling it.
- FIG. 5 shows an example in which a vibration sensor (not shown) is provided near the second position P2 of the exhaust duct 22, and the effect of the silent device 10 is measured based on the error signal received from this vibration sensor.
- Times t1 and t2 in FIG. 5 are the same as times t1 and t2 in FIG. 4, respectively.
- the second waveform w2 (FIG. 4) does not have the opposite phase of the first waveform w1. Therefore, as shown in FIG. 5, the damping effect of the unbalanced motor 11 at time t1 is relatively small, and vibration is detected in the exhaust duct 22 .
- the second waveform w2 (FIG. 4) has the opposite phase of the first waveform w1. Therefore, as shown in FIG. 5, the damping effect of the unbalance motor 11 at time t2 is greater than that at time t1, and the vibration in the exhaust duct 22 is greatly reduced.
- FIG. 6 is a diagram illustrating an example of a hardware configuration of a silent device according to an embodiment of the present disclosure. The hardware configuration of the silent device 10 according to this embodiment will be described below with reference to FIG.
- a computer 900 comprises a processor 901 , a main storage device 902 , an auxiliary storage device 903 and an interface 904 .
- the above-described silent device 10 (control device 12) is implemented in one or more computers 900.
- the operation of each functional unit described above is stored in the auxiliary storage device 903 in the form of a program.
- the processor 901 reads out the program from the auxiliary storage device 903, develops it in the main storage device 902, and executes the above processing according to the program.
- the processor 901 secures storage areas corresponding to the storage units described above in the main storage device 902 according to the program. Examples of the processor 901 include a CPU (Central Processing Unit), a GPU (Graphic Processing Unit), a microprocessor, and the like.
- the program may be for realizing a part of the functions to be exhibited by the computer 900.
- the program may function in combination with another program already stored in the auxiliary storage device 903 or in combination with another program installed in another device.
- the computer 900 may include a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device) in addition to or instead of the above configuration.
- PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Array).
- part or all of the functions implemented by processor 901 may be implemented by the integrated circuit.
- Such an integrated circuit is also included as an example of a processor.
- auxiliary storage device 903 examples include HDD (Hard Disk Drive), SSD (Solid State Drive), magnetic disk, magneto-optical disk, CD-ROM (Compact Disc Read Only Memory), DVD-ROM (Digital Versatile Disc Read Only memory), semiconductor memory, and the like.
- Auxiliary storage device 903 may be an internal medium directly connected to the bus of computer 900, or an external storage device 910 connected to computer 900 via interface 904 or a communication line. Further, when this program is delivered to the computer 900 via a communication line, the computer 900 receiving the delivery may develop the program in the main storage device 902 and execute the above process.
- secondary storage 903 is a non-transitory, tangible storage medium.
- the program may be for realizing part of the functions described above.
- the program may be a so-called difference file (difference program) that implements the above-described functions in combination with another program already stored in the auxiliary storage device 903 .
- the silent device 10 includes the first waveform acquisition unit 120 that acquires the first waveform w1 representing the vibration at the first position P1 of the exhaust duct 22, and the second position P2 of the exhaust duct 22.
- the second waveform acquisition unit 121 that acquires the second waveform w2 representing the rotation of the unbalance motor 11, and the first waveform w1
- a setting unit 122 that sets a target frequency
- a correction unit 123 that corrects the target frequency so that the first waveform w1 and the second waveform w2 have a predetermined phase difference.
- the silent device 10 can adjust the target frequency of the unbalance motor 11 so that the unbalance motor 11 can generate vibration that can reduce the vibration of the exhaust duct 22 .
- the correction unit 123 adds a predetermined correction amount to correct the target frequency.
- the silent device 10 corrects the target frequency of the unbalance motor 11 by a predetermined amount (for example, 0.1 Hz), and easily adjusts the phase difference between the first waveform w1 and the second waveform w2. can be adjusted. Further, even when the vibration frequency of the exhaust duct 22 fluctuates, the noise reduction device 10 can sequentially adjust the target frequency of the unbalance motor 11 following this fluctuation.
- a predetermined amount for example, 0.1 Hz
- the correction unit 123 sets the correction amount to zero when the first waveform w1 and the second waveform w2 have a predetermined phase difference.
- the silent device 10 can automatically set the setting unit 122
- the unbalance motor 11 can be operated by fixing the target frequency set by .
- the first waveform acquisition unit 120 of the silent device 10 receives the vibration waveform of the exhaust duct 22 from the vibration sensor 23 of the exhaust duct 22 as a reference signal.
- the reference signal may be any sensor signal capable of detecting combustion oscillations of the gas turbine 20 .
- the first waveform acquisition section 120 may receive a reference signal indicating pressure fluctuations from a pressure sensor installed inside the exhaust duct 22 .
- the silencer (10) is based on a reference signal that detects vibrations at a first position of the exhaust duct (22) of the gas turbine (20), the exhaust duct ( 22), and a first waveform acquisition unit (120) for acquiring a first waveform (w1) representing the vibration of the exhaust duct (22), and a target frequency specified for the exhaust duct (22) at a second position of the exhaust duct (22).
- a second waveform (w2) representing the rotation of the unbalanced motor (11) based on an unbalanced motor (11) that gives vibration and a measurement signal that measures the rotation pulse of the unbalanced motor (11).
- the silent device can adjust the target frequency of the unbalanced motor so that the unbalanced motor can generate vibration that can reduce the vibration of the exhaust duct.
- the correcting unit (123) sets the first waveform (w1) and the second waveform (w2) to predetermined If the phase difference is not , the target frequency is corrected by adding a predetermined correction amount.
- the silent device can easily adjust the phase difference between the first waveform and the second waveform by correcting the target frequency of the unbalanced motor by a predetermined amount. Further, even if the vibration frequency of the exhaust duct fluctuates, the noise reduction device can sequentially adjust the target frequency of the unbalance motor following this fluctuation.
- the correcting section (123) sets the first waveform (w1) and the second waveform (w2) to predetermined When the phase difference is , the correction amount of the target frequency is set to zero.
- the silent device automatically fixes the frequency to the target frequency set by the setting unit, thereby reducing the unbalanced frequency. motor can be operated.
- a silent method represents exhaust duct vibrations based on a reference signal that detects vibrations at a first location of an exhaust duct (22) of a gas turbine (20).
- the program based on a reference signal detecting vibrations at a first position of the exhaust duct (22) of the gas turbine (20), and rotating an unbalanced motor (11) to impart vibration of a specified target frequency to the exhaust duct (22) at a second position of the exhaust duct (22) obtaining a second waveform (w2) representing the rotation of the unbalanced motor (11) based on the measurement signal obtained by measuring the pulse; setting a target frequency based on the first waveform (w1); compensating the target frequency so that the first waveform (w1) and the second waveform (w2) have a predetermined phase difference.
- the silent device, silent method, and program according to the present disclosure it is possible to reduce low frequency noise in the exhaust path of a gas turbine.
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Abstract
Description
本願は、2021年6月30日に日本に出願された特願2021-108567号について優先権を主張し、その内容をここに援用する。
図1は、本開示の一実施形態に係るガスタービン設備の全体構成を示す図である。
図1に示すように、ガスタービン設備1は、ガスタービン20と、排熱回収ボイラ21(以下、HRSGとも記載する。)と、排気ダクト22と、静音装置10とを備えている。
図2は、本開示の一実施形態に係る静音装置の機能構成を示す図である。
図2に示すように、静音装置10のアンバランスモータ11には、インバータ13を介して駆動するための電力が供給される。静音装置10の制御装置12は、インバータ制御により、アンバランスモータ11を任意の周波数(後述の目標周波数)で回転させる。また、制御装置12は、第1波形取得部120と、第2波形取得部121と、設定部122と、補正部123とを備えている。
図3は、本開示の一実施形態に係る静音装置の処理の一例を示すフローチャートである。
図4は、本開示の一実施形態に係る静音装置の機能を説明するための第1の図である。
図5は、本開示の一実施形態に係る静音装置の機能を説明するための第2の図である。
以下、図3~図5を参照しながら、静音装置10の処理の詳細を説明する。
図6は、本開示の一実施形態に係る静音装置のハードウェア構成の一例を示す図である。
以下、図6を参照しながら、本実施形態に係る静音装置10のハードウェア構成について説明する。
さらに、当該プログラムは、前述した機能を補助記憶装置903に既に記憶されている他のプログラムとの組み合わせで実現するもの、いわゆる差分ファイル(差分プログラム)であってもよい。
以上のように、本実施形態に係る静音装置10は、排気ダクト22の第1位置P1における振動を表す第1波形w1を取得する第1波形取得部120と、排気ダクト22の第2位置P2において、排気ダクト22に対して目標周波数の振動を与えるアンバランスモータ11と、アンバランスモータ11の回転を表す第2波形w2を取得する第2波形取得部121と、第1波形w1に基づいて目標周波数を設定する設定部122と、第1波形w1と第2波形w2とが所定の位相差となるように目標周波数を補正する補正部123と、を備える。
上述の実施形態に記載の静音装置、静音方法、およびプログラムは、例えば以下のように把握される。
10 静音装置
11 アンバランスモータ
12 制御装置
120 第1波形取得部
121 第2波形取得部
122 設定部
123 補正部
13 インバータ
2 タービン建屋
20 ガスタービン
21 排熱回収ボイラ(HRSG)
22 排気ダクト
23 振動センサ
900 コンピュータ
901 プロセッサ
902 主記憶装置
903 補助記憶装置
904 インタフェース
910 外部記憶装置
w1 第1波形
w2 第2波形
Claims (5)
- ガスタービンの排気ダクトの第1位置における振動を検出する参照信号に基づいて、前記排気ダクトの振動を表す第1波形を取得する第1波形取得部と、
前記排気ダクトの第2位置において、前記排気ダクトに対して指定された目標周波数の振動を与えるアンバランスモータと、
前記アンバランスモータの回転パルスを計測した計測信号に基づいて、前記アンバランスモータの回転を表す第2波形を取得する第2波形取得部と、
前記第1波形に基づいて前記目標周波数を設定する設定部と、
前記第1波形と前記第2波形とが所定の位相差となるように、前記目標周波数を補正する補正部と、
を備える静音装置。 - 前記補正部は、前記第1波形と前記第2波形とが所定の位相差ではない場合に、所定の補正量を加算して前記目標周波数を補正する、
請求項1に記載の静音装置。 - 前記補正部は、前記第1波形と前記第2波形とが所定の位相差となった場合に、前記目標周波数の補正量をゼロにする、
請求項1に記載の静音装置。 - ガスタービンの排気ダクトの第1位置における振動を検出する参照信号に基づいて、前記排気ダクトの振動を表す第1波形を取得するステップと、
前記排気ダクトの第2位置に設けられたアンバランスモータにより、前記排気ダクトに対して指定された目標周波数の振動を与えるステップと、
前記アンバランスモータの回転パルスを計測した計測信号に基づいて、前記アンバランスモータの回転を表す第2波形を取得するステップと、
前記第1波形に基づいて前記目標周波数を設定するステップと、
前記第1波形と前記第2波形とが所定の位相差となるように、前記目標周波数を補正するステップと、
を有する静音方法。 - ガスタービンの排気ダクトの第1位置における振動を検出する参照信号に基づいて、前記排気ダクトの振動を表す第1波形を取得するステップと、
前記排気ダクトの第2位置において、前記排気ダクトに対して指定された目標周波数の振動を与えるアンバランスモータの回転パルスを計測した計測信号に基づいて、前記アンバランスモータの回転を表す第2波形を取得するステップと、
前記第1波形に基づいて前記目標周波数を設定するステップと、
前記第1波形と前記第2波形とが所定の位相差となるように、前記目標周波数を補正するステップと、
を静音装置のコンピュータに実行させるプログラム。
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JP2023531444A JP7523690B2 (ja) | 2021-06-30 | 2022-03-28 | 静音装置、静音方法、およびプログラム |
KR1020237036032A KR20230160867A (ko) | 2021-06-30 | 2022-03-28 | 정음장치, 정음방법, 및 프로그램 |
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JPH05188978A (ja) * | 1992-01-08 | 1993-07-30 | Tobishima Corp | 振動機器における振動音の防止方法及びその装置 |
JP2018005081A (ja) * | 2016-07-06 | 2018-01-11 | 三菱日立パワーシステムズ株式会社 | ダクト及びタービン設備 |
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WO2000005494A1 (de) | 1998-07-22 | 2000-02-03 | Friedmund Nagel | Vorrichtung und verfahren zur aktiven reduzierung der schallemission von strahltriebwerken und zu deren diagnose |
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JPH05188978A (ja) * | 1992-01-08 | 1993-07-30 | Tobishima Corp | 振動機器における振動音の防止方法及びその装置 |
JP2018005081A (ja) * | 2016-07-06 | 2018-01-11 | 三菱日立パワーシステムズ株式会社 | ダクト及びタービン設備 |
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