Steam turbine blade thinning amount management device

Abstract

To provide a thinning amount management apparatus for a moving blade of a steam turbine, which can recognize in time series a thinning amount from the past to the present predicted on the basis of operating data and a thinning amount in the future predicted on the basis of future operating conditions.SOLUTION: A thinning amount management apparatus 18 of an embodiment manages a thinning amount of a first stage moving blade caused by solid particles contained in working steam. The thinning amount management apparatus 18 is provided with a display information generating unit 73 that generates display information for displaying, on a display unit, past thinning amount related information showing information on a past thinning amount of the first stage moving blade of the steam turbine from the past to the present calculated based on measured information, and future thinning amount related information showing information on a future thinning amount of the first stage moving blade in the future calculated based on future operating conditions and the past thinning amount related information inputted in an operation using a user interface screen.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a device for managing metal loss in a rotor blade of a steam turbine. [Background technology]

[0002] Steam introduced into a steam turbine may contain solid particles, such as oxide scale that has peeled off from the surface of boiler piping. For example, even in steam valves equipped with strainers, the strainer cannot capture all of the solid particles. As a result, steam containing solid particles flows into the steam turbine.

[0003] The surface of a moving blade can be eroded by collision with steam containing solid particles. This solid particle erosion (SPE) is a type of wear phenomenon that reduces the thickness of the moving blade surface over time. If the thickness reduction due to SPE progresses, it may develop into the occurrence of cracks or the scattering of blade fragments. Thinning due to SPE is particularly evident in the first-stage moving blades of high-pressure turbines and intermediate-pressure turbines.

[0004] Conventionally, the amount of metal loss due to SPE is checked during periodic inspections. If the amount of metal loss exceeds a predetermined threshold, replacement of the blade is recommended. In the following, metal loss due to SPE will be simply referred to as "metal loss." Also, the amount of metal loss due to SPE will be simply referred to as "metal loss amount."

[0005] In recent years, the introduction of renewable energy has been accelerating in power generation facilities as a measure to reduce carbon dioxide (CO2) emissions. When generating electricity using renewable energy, the amount of power generated varies depending on factors such as the weather. For this reason, in recent years, thermal power generation facilities have shifted to operations centered on regulating thermal power in order to compensate for the unstable power supply caused by power generation using renewable energy. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Special Publication No. 56-12682 [Patent Document 2] Patent No. 4575176 [Patent Document 3] Japanese Patent Application Laid-Open No. 2002-297710 Summary of the Invention [Problem to be solved by the invention]

[0007] As described above, in thermal power generation facilities equipped with steam turbines, operations are shifting from those centered on rated load to those centered on regulated thermal power generation, which means there is a risk that thinning of the moving blades of the steam turbine will progress further.

[0008] Users who manage steam turbines in thermal power plants can learn the amount of metal loss in rotor blades during periodic inspections. However, with conventional steam turbine management systems, users cannot learn information that predicts the amount of metal loss in rotor blades from past periodic inspections to the present, or information that predicts the amount of metal loss in the rotor blades in the future based on the future operating conditions of the actual turbine. Furthermore, with conventional steam turbine management systems, users cannot learn information such as the time when the amount of metal loss will reach a threshold value that requires rotor blade replacement.

[0009] The problem to be solved by the present invention is to provide a device for managing metal loss in moving blades of a steam turbine, which is capable of recognizing, in chronological order, the amount of metal loss from the past to the present predicted based on operating data and the amount of metal loss in the future predicted based on future operating conditions. [Means for solving the problem]

[0010] A device for managing metal loss of a rotor blade of a steam turbine according to an embodiment manages a metal loss of a first stage rotor blade caused by solid particles contained in working steam. Generator electrical output informationand future operating conditions input through an operation using a user interface screen. The present invention also includes a display information generating unit that generates display information for displaying on a display unit: past metal-thinning amount related information indicating information regarding the past metal-thinning amount of the first stage moving blade of the steam turbine from the past to the present calculated based on the past operating conditions; and future metal-thinning amount related information indicating information regarding the future metal-thinning amount of the first stage moving blade in the future calculated based on the past metal-thinning amount related information and the future operating conditions input through an operation using a user interface screen. The future operating conditions include the number of startups for each startup mode, including cold startup. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a system diagram schematically illustrating a configuration of a steam turbine facility equipped with a wall thinning amount management device according to a first embodiment. [Figure 2] 1 is a block diagram showing a functional configuration of a metal loss amount management device according to a first embodiment. [Figure 3] FIG. 4 is a diagram showing an example of an input screen for future operating conditions displayed on a user interface in the metal loss amount management device of the first embodiment. [Figure 4] FIG. 2 is a diagram showing an example of an input screen for inputting periodic inspection results related to wall thinning into the wall thinning amount management device of the first embodiment. [Figure 5] FIG. 2 is a diagram showing an example of an input screen for inputting periodic inspection results related to wall thinning into the wall thinning amount management device of the first embodiment. [Figure 6] 10 is a flowchart for explaining a flow of calculation of a past amount of thinning in a periodic thinning amount calculation unit of the thinning amount management device according to the first embodiment. [Figure 7] 10 is a flowchart for explaining a flow of calculation of a future wall-thinning amount in a future wall-thinning amount calculation unit of the wall-thinning amount management device according to the first embodiment. [Figure 8] 10A and 10B are diagrams for explaining a method for calculating a recommended inspection time, a recommended replacement time, a recommended preparation time, and a preparation threshold value in a future thinning amount calculation unit of the thinning amount management device of the first embodiment. [Figure 9]10A and 10B are diagrams for explaining a method for calculating a recommended inspection time, a recommended replacement time, a recommended preparation time, and a preparation threshold value in a future thinning amount calculation unit of the thinning amount management device of the first embodiment. [Figure 10] FIG. 10 is a diagram showing an example of a display screen on which display information is displayed on the installation date of the metal loss amount management device of the first embodiment. [Figure 11] 4 is a flowchart for explaining a periodic metal loss calculation processing method in the metal loss management device according to the first embodiment. [Figure 12] FIG. 4 is a diagram showing an example of a display screen on which calculation results are displayed in the metal loss amount management device of the first embodiment. [Figure 13] FIG. 10 is a diagram showing an example of a display screen showing a calculation result in a post-inspection calculation process of the metal loss amount management device of the first embodiment. [Figure 14] 4 is a flowchart for explaining a periodic metal loss calculation processing method in the metal loss management device according to the first embodiment. [Figure 15] 4 is a flowchart for explaining a future wall-thickness reduction amount calculation processing method in the wall-thickness reduction amount management device according to the first embodiment. [Figure 16] 4 is a flowchart for explaining a future wall-thickness reduction amount calculation processing method in the wall-thickness reduction amount management device according to the first embodiment. [Figure 17] 10 is a flowchart for explaining a future wall-thickness reduction amount calculation processing method in the wall-thickness reduction amount management device according to the second embodiment. [Figure 18] 10 is a flowchart for explaining a future wall-thickness reduction amount calculation processing method in the wall-thickness reduction amount management device according to the second embodiment. [Figure 19] FIG. 10 is a diagram illustrating an example of a display screen in the metal loss amount management device according to the second embodiment. [Figure 20] FIG. 10 is a diagram showing an example of a selection screen for selecting a comparison calculation result to be displayed on a user interface in the metal loss amount management device of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0013] (First embodiment) 1 is a system diagram that schematically shows the configuration of a steam turbine facility 1 that includes a metal loss management device 18 according to a first embodiment. The metal loss management device 18 functions as a metal loss management device for rotor blades of a steam turbine. The metal loss management device 18 also manages the amount of metal loss in the rotor blades that is caused by solid particles such as oxide scale contained in the working steam that operates the steam turbine.

[0014] 1, the steam turbine facility 1 includes a boiler 10, a high-pressure turbine 11, a reheater 12, an intermediate-pressure turbine 13, a low-pressure turbine 14, a generator 15, a condenser 16, a feedwater pump 17, and a metal loss management device 18. Here, the moving blades of the high-pressure turbine 11 and the intermediate-pressure turbine 13 function as moving blades of a steam turbine in which the amount of metal loss due to SPE (Solid Particle Erosion) is managed by the metal loss management device 18.

[0015] Among the high-pressure turbine 11 and the intermediate-pressure turbine 13, metal thinning is likely to progress in the moving blades in the first turbine stage. Therefore, the metal thinning amount management device 18 manages, for example, the amount of metal thinning in the moving blades in the first stage of the high-pressure turbine 11 and the intermediate-pressure turbine 13. Note that the metal thinning amount management device 18 may manage the amount of metal thinning in moving blades in other turbine stages that are subject to SPE, in addition to the moving blades in the first stage. Note that the moving blades to be managed are also the moving blades whose metal thinning amount is predicted by the metal thinning amount management device 18.

[0016] The steam turbine facility 1 includes a metal thinning amount management device 18 and an output detector 30 as a metal thinning amount management system for calculating and managing the amount of metal thinning of rotor blades in a steam turbine.

[0017] The boiler 10 heats feedwater to generate steam and delivers the steam to a main steam pipe 20. The high-pressure turbine 11 is rotated by steam introduced from the main steam pipe 20 and discharges the steam to a low-temperature reheat steam pipe 21. The reheater 12 reheats the steam introduced from the low-temperature reheat steam pipe 21 and delivers the steam to a high-temperature reheat steam pipe 22.

[0018] The intermediate-pressure turbine 13 is rotated by steam introduced from the high-temperature reheat steam pipe 22 and discharges the steam into a crossover pipe 23. The low-pressure turbine 14 is rotated by steam introduced from the crossover pipe 23 and discharges the steam into an exhaust pipe 24. The generator 15 generates electricity by being driven by the high-pressure turbine 11, the intermediate-pressure turbine 13 and the low-pressure turbine 14. The generator 15 is connected, for example, to the high-pressure turbine 11, the intermediate-pressure turbine 13 and the low-pressure turbine 14 on the same shaft.

[0019] The condenser 16 condenses the steam introduced from the exhaust pipe 24 to produce condensed water. The feedwater pump 17 supplies the condensed water of the condenser 16 to the boiler 10 via the feedwater pipe 25 as feedwater.

[0020] The metal-thickness reduction amount management device 18 is a device for calculating and managing the amount of metal-thickness reduction caused by SPE of the rotor blades in the steam turbine. Details of the metal-thickness reduction amount management device 18 will be described later.

[0021] The output detector 30 detects the electrical output of the generator 15 and outputs a detection signal to the wall-thinning amount management device 18 .

[0022] Next, the wall-thinning amount management device 18 will be described.

[0023] 2 is a block diagram showing the functional configuration of the wall-thinning amount management device 18 according to the first embodiment. The wall-thinning amount management device 18 is a device that predicts and manages the wall-thinning amount from the past to the present based on the operation data of the actual machine, and the wall-thinning amount in the future based on the assumed operating conditions. The wall-thinning amount management device 18 also generates display information for displaying the predicted results, such as the wall-thinning amount, on a display unit.

[0024] As shown in FIG. 2, the metal loss amount management device 18 includes a measurement data acquisition unit 40, a user interface 50, a storage unit 60, and a calculation unit 70.

[0025] The measurement data acquisition unit 40 is an interface that acquires detection signals related to the electrical output output from the output detector 30. The measurement data acquisition unit 40 has a function of converting the acquired detection signals related to the electrical output into electrical output information. The electrical output information includes, for example, information related to the electrical output as well as information related to the time the electrical output was obtained, i.e., information related to the operating time of the steam turbine.

[0026] Furthermore, the measurement data acquisition unit 40 is an interface that acquires, for example, detection signals relating to the number of start-ups of the high-pressure turbine 11 and the intermediate-pressure turbine 13 from the management system of the steam turbine equipment 1. The measurement data acquisition unit 40 has a function of converting the acquired detection signals relating to the number of start-ups into start-up count information.

[0027] Here, examples of starting a steam turbine include cold start, warm start, and hot start. A cold start refers to starting a turbine after a long period of shutdown, such as for a periodic inspection. An example of the shutdown period before starting a cold start is a shutdown period of more than three days. A warm start refers to stopping operation on a weekend and starting it up at the beginning of the following week. An example of the shutdown period before starting a warm start is a shutdown period of 12 to 36 hours. A hot start refers to stopping operation late at night and starting it up the next morning. An example of the shutdown period before starting a hot start is a shutdown period of less than 12 hours. Note that a shutdown is considered to have occurred when the output of the generator 15 is equal to or lower than a predetermined threshold.

[0028] The measurement data acquiring unit 40 acquires the above-mentioned detection signal at predetermined time intervals. For example, the measurement data acquiring unit 40 acquires the detection signal at one-hour intervals. The measurement data acquiring unit 40 outputs the converted start count information and electrical output information to the measurement data storage unit 62 of the storage unit 60.

[0029] The user interface 50 includes a display unit that displays various information to the user (administrator) and an input device through which the user inputs various information. The display unit is configured, for example, by a display. The display unit may also be configured by a touch panel that functions as a display screen and also functions as an input device that allows direct input to the screen. The input device is configured, for example, by a keyboard, mouse, etc.

[0030] The storage unit 60 includes an input information storage unit 61, a measurement data storage unit 62, a program storage unit 63, a calculation result storage unit 64, a template storage unit 65, and a display information storage unit 66. The storage unit 60 is realized by, for example, a hard disk drive, a nonvolatile memory device, etc. The storage unit 60 may not be physically integrated with the metal loss amount management device 18, but may be connected to the metal loss amount management device 18 via a network (not shown).

[0031] The input information storage unit 61 stores, for example, future operating conditions, various setting conditions, and the like input via the user interface 50. The input information storage unit 61 also stores, for example, various setting conditions, design information on the blades to be managed, information on periodic inspection results related to the amount of metal loss, and the like input from an input device at the manufacturer of the metal loss amount management device 18.

[0032] Here, the future operating conditions are used in a calculation to predict the amount of future wall thinning. The future operating conditions are the future operating conditions of the steam turbine equipment 1. The future operating conditions include the operating time in one day (24 hours) for each divided load and the annual availability factor. The future operating conditions also include the number of starts in a year.

[0033] Examples of future operating conditions include a preset default operating mode, a customized operating mode in which the user arbitrarily sets the operating time for each load category, the annual operating rate, and the number of startups, etc. Note that even in the default operating mode, the user arbitrarily sets the number of startups.

[0034] Here, the categorized load refers to a load obtained by dividing the load range of a steam turbine (for example, a range from 0% load to 100% load) into predetermined load units (for example, 10% load units). For example, if the load range of a steam turbine from 0% load to 100% load is divided into 10% load units, the categorized loads are 10% load, 20% load, 30% load, 40% load, 50% load, 60% load, 70% load, 80% load, 90% load, and 100% load.

[0035] FIG. 3 is a diagram showing an example of an input screen 80 for inputting future operating conditions displayed on the user interface 50 in the metal loss amount management device 18 according to the first embodiment.

[0036] 3, for example, a past operation performance mode (Same as specific year) 82, a base load operation mode (Base load) 83, and a peak load operation mode (Peak load) 84 are set as default operation modes. A detailed operation plan setting mode (Detailed operation plan setting) 85 is set as a customized operation mode.

[0037] The input screen 80 shown in Figure 3 is an example of a screen on which a user makes selections and inputs via the user interface 50. In the selection pattern 81 in the upper part of Figure 3, the user selects a white circle in the column for the operation mode to be selected for each year and turns it into a black circle. In the input screen 80 shown in Figure 3, the past operation performance mode 82 is selected for 2024, the base load operation mode 83 for 2025 and 2026, the peak load operation mode 84 for 2027 and 2028, and the detailed operation setting mode 85 for 2029 to 2032.

[0038] 3 shows a period up to 2032, but is not limited to this period. For example, a period further into the future, such as 2040, may also be set as the period.

[0039] The past operation performance mode 82 is a mode in which operation is performed using the same operation pattern as the operation pattern for the selected year. In the past operation performance mode 82, the operation mode is set based on the 10% load unit sectional load and the operation time at each sectional load calculated from the operation data from January to December of the selected year. In addition, in the past operation performance mode 82, the operation mode is set based on the availability factor for the selected year. Furthermore, in the past operation performance mode 82, the operation mode is set based on the number of cold start-ups, warm start-ups, and hot start-ups for the selected year. In FIG. 3, the operation pattern for 2021 is selected.

[0040] Here, the availability rate is the percentage of the number of days that the steam turbine equipment 1 operates in each year. In other words, the availability rate is the value obtained by dividing the number of days that the steam turbine equipment 1 operates in one year by 365 days and expressing it as a percentage.

[0041] The base load operation mode 83 is a mode in which the system operates at a high load ranging from 70% to 100%. In the base load operation mode 83, for example, load divisions are set in which the load ranges from 70% to 100% is divided in 10% load increments. In addition, in the base load operation mode 83, an operating rate is set for each year.

[0042] The base load operation mode 83 is a default value, but is set, for example, by referring to past operating data of the steam turbine equipment 1. In addition, in the base load operation mode 83, the number of startups is set arbitrarily for each startup mode of cold startup, warm startup, and hot startup shown in the startup plan 89 column. The conditions arbitrarily set by the user in the startup plan 89 column are used as the number of startups. As shown in FIG. 3 , the user inputs the number of startups in the columns for each startup mode for 2025 and 2026 in the startup plan 89. The base load operation mode 83 is set, for example, on an annual basis.

[0043] Table 1 shows an example of a baseload operation mode 83.

[0044] [Table 1]

[0045] Table 1 shows an example of the operating hours per day (24 hours) set for each classified load for each year from 2024 to 2032. As shown in Table 1, for example, the base load operation mode 83 for 2024 is set as follows: 100% load (rated load): 3 hours, 90% load: 10 hours, 80% load: 9 hours, 70% load: 2 hours. The availability rate is also set to 89%.

[0046] Note that, here, an example is shown in which the load range from 100% load to 70% load is divided into 10% load increments as the base load operation mode 83, but this setting is not limiting. The load range in the base load operation mode 83 may be set wider or narrower than the range in the example above. Furthermore, the load increment may be set wider or narrower than the 10% load increment. Furthermore, the number of years set may be shorter or longer than the number of years set in Table 1.

[0047] The peak load operation mode 84 is a mode in which the system operates with load fluctuations in the range from low load to rated load (100% load). In the peak load operation mode 84, for example, a load range from 100% load to 20% load is set in 10% load increments. The peak load operation mode 84 is set on an annual basis. Table 2 shows an example of the peak load operation mode 84.

[0048] [Table 2]

[0049] Table 2 sets the operating hours per day (24 hours) for each load category for each year from 2024 to 2032. For example, the peak load operation mode 84 for 2024 is set as follows: 100% load (rated load): 1 hour, 90% load: 5 hours, 80% load: 2 hours, 70% load: 1 hour, 60% load: 1 hour, 50% load: 1 hour, 40% load: 4 hours, 30% load: 8 hours, 20% load: 1 hour. The availability rate is also set to 89%.

[0050] The peak load operation mode 84 is a default value, but is set, for example, by referring to past operating data of the steam turbine equipment 1. In addition, in the peak load operation mode 84, conditions arbitrarily set by the user in the start-up plan 89 field are used as the number of start-ups. As shown in FIG. 3 , the user inputs the number of start-ups in the start-up mode fields for 2027 and 2028 in the start-up plan 89.

[0051] In addition, although an example is shown here in which the peak load operation mode 84 is a load range from 100% load to 20% load divided in 10% load increments, the present invention is not limited to this setting. The load range in the peak load operation mode 84 may be set wider or narrower than the range in the above example. The load increment may be set wider or narrower than the 10% load increment. The number of years set may be shorter or longer than the number of years set in Table 2.

[0052] In the detailed operation setting mode 85, the operation time per day (24 hours) is set arbitrarily for each load category shown in the operation data 86 column of Fig. 3. The availability rate is also set arbitrarily. The user inputs the operation time for each load category in the year column of the detailed operation setting mode 85.

[0053] The number of startups is determined based on the conditions arbitrarily set by the user in the startup plan 89. As shown in FIG. 3, the user inputs the number of startups in the startup mode fields of the startup plan 89 for the years 2029 to 2032 for which the detailed operation setting mode 85 is set.

[0054] Note that, here, an example is shown in which the load range from 100% load to 20% load is divided into 10% load increments as the operation data 86 for the detailed operation setting mode 85, but this setting is not limited to this. The load range in the detailed operation setting mode 85 may be set wider or narrower than the range in the example above. Furthermore, the load increment may be set wider or narrower than 10% load increments.

[0055] Here, the user who has input the above-mentioned future driving conditions presses the Save button 87 in Fig. 3. The user interface 50 receives the input from the Save button 87 and outputs information related to the future driving conditions to the input information storage unit 61. The input information storage unit 61 inputs and stores the information related to the future driving conditions.

[0056] The input information storage unit 61 also stores information on periodic inspection results related to the amount of metal thinning. Here, Figures 4 and 5 are diagrams showing examples of an input screen 90 for inputting periodic inspection results related to metal thinning into the metal thinning amount management device 18 of the first embodiment. Note that Figure 4 is an example of the input screen 90 related to the first-stage moving blades of an intermediate-pressure turbine, and Figure 5 is an example of the input screen 90 related to the first-stage moving blades of a high-pressure turbine.

[0057] The periodic inspection results are input by, for example, the manufacturer. The input screens 90A and 90B shown in FIGS. 4 and 5 are displayed, for example, on the operation screen of an input device at the manufacturer. Then, information related to the periodic inspection results from the input device at the manufacturer is output to the input information storage unit 61. The input information storage unit 61 inputs and stores the information related to the periodic inspection results. The input device at the manufacturer is set to be accessible to the wall-thinning amount management device 18.

[0058] First, the input screen 90A in FIG. 4 will be described.

[0059] L1 shown on the input screen 90A in Fig. 4 is the distance between the downstream end face of the reference plate provided on the leading edge side of the rotor blade and the blade surface at the part where thinning has progressed most in the axial direction of the turbine rotor (the direction of steam flow in the figure). The reference plate is provided perpendicular to the axial direction of the turbine rotor (the direction of steam flow in the figure).

[0060] L2 is the distance between the downstream end surface of the reference plate and the blade surface (leading edge) of the new blade at the blade height position of the most severely thinned portion. Note that the blade surface (leading edge) of the new blade is indicated by a dashed line on the input screen 90A. For a new blade, the value of L2 varies depending on the blade specifications and blade height position. Therefore, after the blade height position at L1 is determined, L2 is determined based on the blade height position and the design information of the new blade. Here, the blade height is the height of the blade in a direction perpendicular to the axial direction of the turbine rotor (radial direction) when the blade is installed in the turbine rotor. The blade height is, for example, the height from the radially inner end of the blade effective portion of the blade to the radially outer side.

[0061] Here, L1 and L2 of the blade with the most advanced thinning among the plurality of blades implanted in the circumferential direction are input.

[0062] C is the erosion depth in the axial direction of the turbine rotor, i.e., the amount of wall loss, obtained by subtracting L2 from L1.

[0063] Numerical values ​​based on the results of periodic inspections are entered into the L1 and L2 numerical value fields 91 and 92. After the L1 and L2 numerical values ​​are entered, the amount of wall thinning is displayed in the C numerical value field 93.

[0064] The input device at the manufacturer receives input from the Upload button 94 and outputs information related to the regular inspection results to the input information storage unit 61. The input information storage unit 61 inputs and stores information related to the regular inspection results. The input device at the manufacturer also receives input from the All Delete button 95 and deletes, for example, the values ​​in the L1, L2, and C value fields 91, 92, and 93. The Back button 96 on the input screen 90 is a button that is pressed to return to the display screen 100, which will be described later, without pressing the Upload button 94.

[0065] Furthermore, input screen 90A displays a selection display section 97 for selecting the type of blade. By pressing a selection button 97a on selection display section 97, a selection item for the blade for which periodic inspection results are to be input is displayed on selection display section 97, although this is not shown. For example, when the selection item "IP 1st stage blade" is selected on selection display section 97, input screen 90A shown in FIG. 4 is displayed on the operation screen of the input device at the manufacturer. At this time, display information generation unit 73 inputs information related to the selection of "IP 1st stage blade" from the input device and outputs display information for displaying input screen 90A on the operation screen.

[0066] Next, the input screen 90B in FIG. 5 will be described.

[0067] Here, when the selection item "HP 1st stage blade" is selected in the selection display section 97 of the input screen 90A of FIG. 4, an input screen 90B shown in FIG.

[0068] The symbol a shown on the input screen 90B in Figure 5 is the erosion depth at the leading edge of the blade, i.e., the amount of metal loss at the leading edge of the blade. The symbol a is the distance between the position at the leading edge of the blade where the metal loss has progressed most in the camber line direction and the leading edge of the new blade at the blade height position where the metal loss has progressed most. In the input screen 90B, the blade surface (leading edge) of the new blade is indicated by a dashed line.

[0069] b is the erosion depth on the ventral surface (pressure surface) of the blade, i.e., the amount of metal loss on the ventral surface of the blade. b is the distance between the position at the leading edge of the blade where the most metal loss has progressed in the direction perpendicular to the ventral surface and the ventral surface of a new blade at the blade height position where the most metal loss has progressed.

[0070] Note that a and b are the values ​​at the position where metal thinning has progressed the most in the blade height direction. Furthermore, among the multiple blades planted in the circumferential direction, a and b for the blade where metal thinning has progressed the most are input. Note that the value of a is used as the initial value when calculating the amount of metal thinning.

[0071] Numerical values ​​based on the periodic inspection results are entered into the a and b numerical value fields 98 and 99. The Upload button 94, All Delete button 95, and Back button 96 are as described above.

[0072] Here, the information relating to the latest periodic inspection result serves as an initial value when the periodic thinning amount calculation unit 71 calculates the thinning amount, for example.

[0073] Although an example has been shown here in which the manufacturer inputs the regular inspection results, the system may also be configured to allow the user to input them. In this case, the input screens 90A and 90B shown in FIGS. 4 and 5 are displayed on the display unit of the user interface 50. When the user inputs the regular inspection results, the user inputs the regular inspection results and then presses the Upload button 94. The user interface 50 then receives the input from the Upload button 94 and outputs information related to the regular inspection results to the input information storage unit 61. The input information storage unit 61 inputs and stores information related to the regular inspection results.

[0074] The input information storage unit 61 also stores an inspection threshold, which is the amount of metal loss at which the blade should be inspected. Here, it is recommended that a blade whose amount of metal loss has reached the inspection threshold be inspected. The inspection threshold is a default value that is set based on, for example, the specifications of the blade. Therefore, the inspection threshold is pre-stored in the input information storage unit 61. The manufacturer stores the inspection threshold in the input information storage unit 61 in advance. For example, the manufacturer can change the inspection threshold in response to a change in the control value, etc.

[0075] The input information storage unit 61 stores a replacement threshold, which is the amount of metal loss at which the blade should be replaced. Here, it is recommended that a blade whose amount of metal loss has reached the replacement threshold be replaced. The replacement threshold is a default value that is set based on the amount of metal loss actually measured in an inspection performed when the inspection threshold is reached and the specifications of the blade. The set replacement threshold is output to the input information storage unit 61 from an input device at the manufacturer.

[0076] When the metal loss amount management device 18 is introduced, the input information storage unit 61 stores, as an initial value, a preparation period for determining a recommended preparation time, which will be described later. The preparation period is a period required to prepare a new blade. Note that a user can change the preparation period from the initial value to a predetermined period by requesting the manufacturer. In this case, information related to the changed preparation period is output from an input device at the manufacturer to the input information storage unit 61 of the metal loss amount management device 18. Then, the input information storage unit 61 stores the information related to the changed preparation period.

[0077] The measurement data storage unit 62 stores the electrical output information and the number of startups information output from the measurement data acquisition unit 40. The measurement data storage unit 62 stores the electrical output information and the number of startups information output from the measurement data acquisition unit 40 every hour, for example.

[0078] The program storage unit 63 stores, in the metal loss amount management device 18, a program for calculating the amount of metal loss and managing the amount of metal loss, various arithmetic expressions for calculating the amount of metal loss, various parameters, and the like.

[0079] The calculation result storage unit 64 stores the results of calculations performed by the calculation unit 70. The calculation result storage unit 64 stores, for example, information about the amount of wall-thinning from the past to the present calculated by the periodic wall-thinning amount calculation unit 71. Here, the calculation result storage unit 64 stores, for example, the calculation results of the amount of wall-thinning from the past to the present as the information about the amount of wall-thinning from the past to the present. Note that this information functions as one piece of information related to the amount of wall-thinning from the past.

[0080] The calculation result storage unit 64 stores, for example, information relating to the future amount of wall-thickness reduction calculated by the future amount of wall-thickness reduction calculation unit 72.

[0081] The calculation result storage unit 64 stores the recommended inspection time when the future amount of wall-thinning reaches the inspection threshold, calculated by the calculation of the future wall-thinning amount calculation unit 72. The recommended inspection time is specified by the year, month, and date. The calculation method for this recommended inspection time will be described later.

[0082] The calculation result storage unit 64 stores the recommended replacement time when the future amount of thinning calculated by the future thinning amount calculation unit 72 will reach the replacement threshold. The recommended replacement time is specified by the year, month, and date. The method for calculating the recommended replacement time will be described later.

[0083] Here, the recommended preparation period is defined as the period before the recommended replacement period by a predetermined preparation period. The recommended preparation period refers to the period when it is recommended to start preparation for a new blade for a blade whose recommended replacement period has been identified. Note that the recommended preparation period is also specified by year, month, and date, just like the recommended replacement period. For example, if the recommended replacement period is June 1, 2040, and the preparation period is three years, the recommended preparation period will be June 1, 2037. As mentioned above, the preparation period is stored in the input information storage unit 61.

[0084] The calculation result storage unit 64 also stores the future wall-thinning amount at the recommended preparation time calculated by the future wall-thinning amount calculation unit 72 as a preparation threshold. That is, the wall-thinning amount at the recommended preparation time is the preparation threshold. A method for calculating the preparation threshold will be described later.

[0085] The calculation result storage unit 64 stores, as information related to the future amount of thinning, calculation results such as the future amount of thinning, preparation threshold, recommended preparation time, recommended replacement time, etc. Note that this information functions as information related to the future amount of thinning.

[0086] The template storage unit 65 stores information relating to template screens that serve as the basis for screens that display the calculation results stored in the calculation result storage unit 64. Information relating to various template screens to be displayed on the display unit of the user interface 50 is stored in advance in the template storage unit 65.

[0087] The display information storage unit 66 stores the display information to be displayed on the display unit, which is generated by the display information generation unit 73 of the calculation unit 70.

[0088] 2, the calculation unit 70 is a calculation block including a fixed-period wall-thinning amount calculation unit 71, a future wall-thinning amount calculation unit 72, and a display information generation unit 73. In response to a user's execution start input from the user interface 50, the calculation unit 70 reads out a program for executing the wall-thinning amount management device 18 from the program storage unit 63. This enables the functions of the fixed-period wall-thinning amount calculation unit 71, the future wall-thinning amount calculation unit 72, and the display information generation unit 73 to be executed.

[0089] The fixed-cycle metal-reduction amount calculation unit 71 is a calculation block that reads out an arithmetic expression and parameters for calculating the amount of metal-reduction from the program storage unit 63, and calculates the amount of metal-reduction caused by the SPE in a fixed cycle based on the electrical output information and activation count information stored in the measurement data storage unit 62. The fixed-cycle metal-reduction amount calculation unit 71 outputs information related to the calculated amount of metal-reduction to the calculation result storage unit 64. Note that the fixed-cycle metal-reduction amount calculation unit 71 may obtain activation count information from the electrical output information.

[0090] Here, the fixed period refers to a period from a predetermined date in the past to the present, for example, every hour. The fixed period wall-thinning amount calculation unit 71 calculates the wall-thinning amount at fixed periods (for example, every hour) based on the electrical output information and the start count information, using the wall-thinning amount measured in the periodic inspection on a predetermined date in the past as an initial value. The current wall-thinning amount is calculated by adding the wall-thinning amount that has progressed from the predetermined date in the past to the wall-thinning amount measured in the periodic inspection on the predetermined date in the past. Note that the wall-thinning amount that has progressed from the predetermined date in the past to the present, calculated by the fixed period wall-thinning amount calculation unit 71, is a predicted value.

[0091] The fixed-cycle wall-thinning amount calculation unit 71 determines, based on the inspection threshold stored in the input information storage unit 61, whether the calculated wall-thinning amount has reached the inspection threshold.

[0092] The fixed-cycle metal-thinning amount calculation unit 71 determines whether the calculated amount of metal-thinning has reached the replacement threshold value based on the replacement threshold value stored in the input information storage unit 61. The fixed-cycle metal-thinning amount calculation unit 71 also determines whether the calculated amount of metal-thinning has reached the preparation threshold value based on the preparation threshold value stored in the input information storage unit 61. The operations related to these determinations in the fixed-cycle metal-thinning amount calculation unit 71 will be described later.

[0093] The future wall-thinning amount calculation unit 72 is a calculation block that reads out an arithmetic expression and parameters for calculating the wall-thinning amount from the program storage unit 63, and calculates the future wall-thinning amount due to SPE based on the future operating conditions stored in the input information storage unit 61. The future wall-thinning amount calculation unit 72 outputs information related to the calculated wall-thinning amount to the calculation result storage unit 64.

[0094] Here, "future" refers to a period from the present to a future year set as the future operating conditions. The future wall-thinning amount calculation unit 72 uses the current wall-thinning amount calculated by the periodic wall-thinning amount calculation unit 71 as an initial value and calculates the future wall-thinning amount for each predetermined year (for example, every year) based on the future operating conditions stored in the input information storage unit 61. Note that the future wall-thinning amount calculated by the future wall-thinning amount calculation unit 72 is a predicted value.

[0095] The future wall-thinning amount calculation unit 72 determines whether the future wall-thinning amount has reached the inspection threshold based on the inspection threshold stored in the input information storage unit 61 and the calculated future wall-thinning amount. If the future wall-thinning amount calculation unit 72 determines that the future wall-thinning amount has reached the inspection threshold, the future wall-thinning amount calculation unit 72 calculates the recommended inspection time when the future wall-thinning amount will reach the inspection threshold.

[0096] Furthermore, the future wall-thinning amount calculation unit 72 determines whether the future wall-thinning amount has reached the replacement threshold, based on the replacement threshold stored in the input information storage unit 61 and the calculated future wall-thinning amount. If the future wall-thinning amount calculation unit 72 determines that the future wall-thinning amount has reached the replacement threshold, the future wall-thinning amount calculation unit 72 calculates the recommended replacement time when the future wall-thinning amount will reach the replacement threshold.

[0097] Furthermore, when it is determined that the future amount of thinning has reached the replacement threshold, the future thinning amount calculation unit 72 calculates the recommended preparation time and the preparation threshold based on the above-mentioned preparation period.

[0098] Here, for ease of explanation, the amount of thinning from the past to the present calculated by the periodic thinning amount calculation unit 71 will be referred to as the past thinning amount, and the amount of thinning from the present to a specified future date calculated by the future thinning amount calculation unit 72 will be referred to as the future thinning amount.

[0099] The display information generation unit 73 is a calculation block that generates display information to be displayed on the display unit of the user interface 50. The display information generation unit 73 generates the display information based on the information stored in the calculation result storage unit 64 and the template storage unit 65. Note that the display information generation unit 73 may directly input the calculation results of the fixed-period wall-thinning amount calculation unit 71 and the future wall-thinning amount calculation unit 72, for example, and generate the display information based on the information stored in the template storage unit 65.

[0100] The display information generating unit 73 outputs the generated display information to the display information storage unit 66. The display information generating unit 73 also outputs the generated display information to the user interface 50.

[0101] Here, the above-mentioned thinning amount management device 18 can be configured as a computer device equipped with an arithmetic device such as a CPU (Central Processing Unit), a memory device such as a ROM (Read Only Memory) or a RAM (Random Access Memory), an external memory device such as an HDD (Hard Disk Drive) or a CD (Compact Disc) drive device, a display device such as a display, and an input device such as a keyboard or a mouse.

[0102] (Calculations in the fixed-period wall-thinning amount calculation unit 71 and the future wall-thinning amount calculation unit 72) Here, the flow of calculations in the periodic thinning amount calculation unit 71 and the future thinning amount calculation unit 72 will be described.

[0103] Fig. 6 is a flowchart for explaining the flow of calculation of the past amount of wall-thinning in the periodic wall-thinning amount calculation unit 71 of the wall-thinning amount management device 18 of the first embodiment. Fig. 7 is a flowchart for explaining the flow of calculation of the future amount of wall-thinning in the future wall-thinning amount calculation unit 72 of the wall-thinning amount management device 18 of the first embodiment.

[0104] First, the flow of calculation of the past wall-thinning amount in the periodic wall-thinning amount calculation unit 71 will be described with reference to FIG.

[0105] As shown in FIG. 6, the fixed-period wall-thinning amount calculation unit 71 reads out, as operating data, electrical output information and start-up count information from the measurement data storage unit 62 (step S1). Here, the electrical output information related to the output of the generator and the start-up count information related to the number of start-ups of the steam turbine function as measured information for calculating the past wall-thinning amount. When executing step S1, the fixed-period wall-thinning amount calculation unit 71 reads out, from the program storage unit 63, a program for calculating the past wall-thinning amount, an arithmetic formula and parameters for calculating the past wall-thinning amount, and design information of the blades to be managed from the input information storage unit 61. The fixed-period wall-thinning amount calculation unit 71 may obtain information related to the start-up count based on the electrical output information.

[0106] Next, the fixed-cycle wall-thinning amount calculation unit 71 calculates the operation parameters based on the electrical output information and the start-up count information (step S2). The fixed-cycle wall-thinning amount calculation unit 71 calculates the start-up frequency F, which is the number of starts per operation time T, using equation (1). Note that T is a proportional constant term related to the operation time. TIFF0007775253000003.tif9150

[0107] Here, N is the number of times the steam turbine equipped with the rotor blade to be managed has been started, and t is the operating time (hours) of the steam turbine. Note that, in the case of multiple starts, the operating time is the cumulative total of the operating times for each start. The fixed-period wall-thinning amount calculation unit 71 calculates the operating time based on the electrical output information.

[0108] Here, the number of starts refers to the number of starts related to all or each of cold starts, warm starts, and hot starts, and the operating time refers to the accumulated operating time related to all or each of cold starts, warm starts, and hot starts. The number of starts and operating time may be used differently depending on whether the steam turbine is the intermediate-pressure turbine 13 or the high-pressure turbine 11.

[0109] Next, the fixed-period metal-thinning amount calculation unit 71 calculates the metal-thinning rate as follows (step S3). Here, the probability distribution formula of the time when the metal-thinning amount reaches the control value, which is based on the operating parameters and design parameters, is replaced with the probability distribution formula of the average metal-thinning rate to calculate the metal-thinning rate.

[0110] Here, the survival function, i.e., the probability that the control value for the amount of wall thinning will not be reached at a certain time, is expressed by equation (2). S0(t) is the reference survival function when using the Cox proportional hazards model, and is defined as the survival function when all Xi, described below, are zero, i.e., Ci=1. TIFF0007775253000004.tif6150

[0111] Here, t is the operating time. Ci is an equation that determines the influence of parameters that affect wall thinning, and is shown by equation (3). Note that i in equation (3) can be set to any value equal to or greater than 1. TIFF0007775253000005.tif6150

[0112] Xi is a constant or variable related to the operating conditions or design conditions related to the factors of wall thinning. Here, Xi includes, for example, the start-up frequency F. βi is a value that determines the degree of influence on the above-mentioned wall thinning factor Xi, and is a coefficient that is set individually for each Xi. Here, βi includes, for example, the degree of influence of the start-up frequency F. Note that information related to the above-mentioned Xi and βi is stored in the input information storage unit 61.

[0113] As mentioned above, the probability that the amount of wall thinning will not reach the control value at a certain time is expressed by equation (2). By solving equation (2) for t and dividing the control value by t, the relationship between the probability of the amount of wall thinning not reaching the control value and the average wall thinning rate v can be obtained.

[0114] Here, in equation (2), t when S(t)=P is t p P is the survival probability of the amount of thinning related to the thinning rate, and is stored in the input information storage unit 61.

[0115] For example, let v be the average wall thinning rate at survival probability P. p Tokuto V p is the control value t p Strictly speaking, it is calculated by dividing the driving time t p The wall thinning rate of the surviving blades is the average wall thinning rate v p Here, the relational expression between the probability of not reaching the metal thinning control value and the average metal thinning rate v described above is read as the probability distribution expression for the average metal thinning rate until the metal thinning control value is reached.

[0116] Then, the fixed-period wall-thinning amount calculation unit 71 calculates the wall-thinning rate V from the probability distribution equation of the average wall-thinning rate until the wall-thinning amount control value is reached.

[0117] The above calculation is an example and is not limiting.

[0118] Subsequently, the fixed-period wall-thinning amount calculation unit 71 calculates the wall-thinning amount for a predetermined period as follows (step S4). When the operating time for the predetermined period is Δt, the wall-thinning amount ΔD for the predetermined period is expressed by equation (4). TIFF0007775253000006.tif6150

[0119] The fixed-period wall-thinning amount calculation unit 71 calculates the wall-thinning amount ΔD in a predetermined period based on the wall-thinning rate V in equation (4).

[0120] Subsequently, the fixed-cycle wall-thickness-reducing amount calculation unit 71 calculates the integrated wall-thickness-reducing amount as follows (step S5). The integrated wall-thickness-reducing amount is expressed by equation (5). TIFF0007775253000007.tif6150

[0121] The fixed-period wall-thinning amount calculation unit 71 calculates the integrated wall-thinning amount by integrating the wall-thinning amount ΔD in each predetermined period using the formula (5).

[0122] In this way, the periodic thinning amount calculation unit 71 calculates the past thinning amount by adding the amount of thinning measured in a periodic inspection on a predetermined day in the past to the cumulative amount of thinning calculated by the above calculation. This provides the past thinning amount of the first stage moving blade that reflects the operation of the high-pressure turbine 11 and the intermediate-pressure turbine 13.

[0123] The fixed-period wall-thinning amount calculation unit 71 outputs the calculation result to the calculation result storage unit 64. The calculation of the past wall-thinning amount in the fixed-period wall-thinning amount calculation unit 71 is performed, for example, every hour. The most recently calculated past wall-thinning amount corresponds to the current wall-thinning amount.

[0124] Next, the flow of calculation of the future wall-thickness reduction amount in the future wall-thickness reduction amount calculation unit 72 will be described with reference to FIG.

[0125] The calculation flow of the future wall-thickness-reduction amount calculation unit 72 is basically the same as the calculation flow of the fixed-period wall-thickness-reduction amount calculation unit 71, except for steps S10 and S11 shown in Fig. 7. That is, the processing of steps S12 to S14 in the calculation of the future wall-thickness-reduction amount calculation unit 72 is basically the same as the processing of steps S3 to S5 in the calculation of the fixed-period wall-thickness-reduction amount calculation unit 71. Therefore, the processing of steps S10 and S11 in the calculation of the future wall-thickness-reduction amount calculation unit 72 will be mainly described here.

[0126] 7, the future wall-thinning amount calculation unit 72 reads out future operating conditions from the input information storage unit 61 (step S10). When executing step S10, the future wall-thinning amount calculation unit 72 reads out a program for calculating the future wall-thinning amount from the program storage unit 63, an arithmetic expression and parameters for calculating the future wall-thinning amount, and design information of the blade to be managed from the input information storage unit 61.

[0127] Next, the future wall-thinning amount calculation unit 72 reads out the start-up count information and information related to the availability rate (availability rate information) in the startup plan 89 column from the input information storage unit 61 based on the future operating conditions (step S10). The availability rate information is obtained based on operation data for a predetermined year in the past operation performance mode 82, on preset information in the base load operation mode 83 and the peak load operation mode 84, and on operation data 86 in the detailed operation setting mode 85. In this calculation, the start-up count information read out from the input information storage unit 61 is treated in the same way as the start-up count information read out from the measurement data storage unit 62 in the calculation of the fixed-period wall-thinning amount calculation unit 71 described above.

[0128] Next, the future wall-thinning amount calculation unit 72 calculates operation parameters based on the start count information and the availability information (step S11). The future wall-thinning amount calculation unit 72 calculates the start frequency F, which is the number of starts per operating time T, using the above-mentioned formula (1). At this time, the future wall-thinning amount calculation unit 72 calculates t, which is the operating time of the steam turbine including the rotor blades to be managed, based on the availability information.

[0129] Next, the future wall-thickness reduction amount calculation unit 72 executes the processes of steps S12 to S14 to calculate the cumulative wall-thickness reduction amount that will progress from the present to a predetermined future date.

[0130] The future thinning amount calculation unit 72 then calculates the future thinning amount on a predetermined future date by adding the calculated amount of thinning that will progress from the present to a predetermined future date to the most recent past amount of thinning calculated by the periodic thinning amount calculation unit 71. This provides the future thinning amount of the first stage rotor blade that reflects the operation of the high-pressure turbine 11 and the intermediate-pressure turbine 13.

[0131] The future wall-thinning amount calculation unit 72 outputs the calculation result to the calculation result storage unit 64. The calculation result of the future wall-thinning amount in the future wall-thinning amount calculation unit 72 is obtained for each year period set as the future operating conditions. That is, the calculation result in the future wall-thinning amount calculation unit 72 is obtained in units of one year.

[0132] (Calculation of recommended inspection time, recommended replacement time, recommended preparation time and preparation threshold) Here, we will explain how to calculate the recommended inspection period, recommended replacement period, recommended preparation period, and preparation threshold. Note that this explanation assumes that the replacement threshold is set based on the blade specifications and the amount of metal loss actually measured in the inspection performed when the inspection threshold is reached. Also, here, we will explain using an example where the preparation period is set to three years.

[0133] The recommended replacement time and the recommended inspection time are calculated basically in the same way, so here, an example of the calculation method for the recommended replacement time will be explained.

[0134] 8 and 9 are diagrams for explaining a method for calculating the recommended inspection timing, recommended replacement timing, recommended preparation timing, and preparation threshold value in the future metal-thinning amount calculation unit 72 of the metal-thinning amount management device 18 of the first embodiment. In Fig. 8 and Fig. 9, the horizontal axis represents time (year), and the vertical axis represents the metal-thinning amount ratio. Note that here, the assumed date in the year on the horizontal axis is January 1st.

[0135] Here, the amount of thinning is shown as a thinning amount ratio. Here, the thinning amount ratio is exemplified as a thinning amount ratio when the thinning amount of the replacement threshold is set to 1. Note that here, an example is shown in which the thinning amount of the replacement threshold is set to 1, i.e., as a reference, but this is not limiting. For example, the thinning amount of the replacement threshold may be shown with the thinning amount of the inspection threshold set to 1 (reference). When the thinning amount ratio is smaller than 1.0, the amount of thinning is below the replacement threshold. When the thinning amount ratio is larger than 1.0, the amount of thinning is above the replacement threshold.

[0136] First, with reference to FIG. 8, a case where the preparation threshold is reached in the future will be described.

[0137] As shown in Figure 8, the metal thinning ratio in 2032 is smaller than 1.0, and the metal thinning ratio in 2033 is larger than 1.0. Therefore, the metal thinning ratio reaches 1.0 between 2032 and 2033. In other words, the recommended replacement time is between 2032 and 2033.

[0138] The future wall-thinning amount calculation unit 72 expresses the relationship between time and the wall-thinning amount ratio as a linear function between 2032 and 2033. Then, the future wall-thinning amount calculation unit 72 calculates the date when the wall-thinning amount ratio will be 1.0.

[0139] In the example shown in Fig. 8, the metal-thickness reduction ratio in 2032 is 0.95, and the metal-thickness reduction ratio in 2033 is 1.05. The future metal-thickness reduction calculation unit 72 calculates the recommended replacement time when the metal-thickness reduction ratio becomes 1.0 based on a linear function. In the example shown in Fig. 8, the calculation results in July 1, 2032 being the recommended replacement time.

[0140] Next, the future thinning amount calculation unit 72 calculates the recommended preparation time based on the recommended replacement time and the preparation period. Here, if the preparation period is three years, the recommended preparation time will be July 1, 2029, three years before the recommended replacement time.

[0141] Next, the future wall-thinning amount calculation unit 72 expresses the relationship between time and the wall-thinning amount ratio as a linear function between 2029 and 2030. Then, the future wall-thinning amount calculation unit 72 calculates the wall-thinning amount ratio on July 1, 2029. In the example shown in FIG. 8, the calculation results in the wall-thinning amount ratio on July 1, 2029 being 0.75. From this result, the preparation threshold, which is the wall-thinning amount ratio at the recommended preparation period, is 0.75.

[0142] The future metal-thinning amount calculation unit 72 then outputs the calculation results of the recommended replacement time, recommended preparation time, and preparation threshold value described above to the calculation result storage unit 64. The calculation result storage unit 64 receives and stores the calculation results of the recommended replacement time, recommended preparation time, and preparation threshold value.

[0143] Next, with reference to FIG. 9, a case where the preparation threshold is reached in the past will be described.

[0144] As shown in Figure 9, the metal thinning ratio will reach 1.0 between 2032 and 2033. In other words, the recommended replacement period will be between 2032 and 2033. Therefore, the recommended preparation period will be in the past than the present (2031).

[0145] As shown in Fig. 9, in the same way as described with reference to Fig. 8, the future metal-thinning amount calculation unit 72 expresses the relationship between time and the metal-thinning amount ratio as a linear function between 2032 and 2033 to calculate the date when the metal-thinning amount ratio will be 1.0. In the example shown in Fig. 9, the calculation results in July 1, 2032 being the recommended replacement date.

[0146] Next, the future thinning amount calculation unit 72 calculates the recommended preparation time based on the recommended replacement time and the preparation period. Here, if the preparation period is three years, the recommended preparation time will be July 1, 2029, three years before the recommended replacement time.

[0147] Next, the future wall-thickness reduction amount calculation unit 72 reads out the wall-thickness reduction amount on July 1, 2029 from the calculation result storage unit 64, and calculates the wall-thickness reduction amount ratio. This calculated wall-thickness reduction amount ratio is the preparation threshold value.

[0148] Here, the amount of wall-thinning on July 1, 2029 is the result of calculation by the fixed-period wall-thinning calculation unit 71. Therefore, the calculation result storage unit 64 stores a plurality of pieces of data at hourly intervals as the calculation results for this day. Therefore, as the amount of wall-thinning on July 1, 2029, the future wall-thinning calculation unit 72 refers to, for example, the largest amount of wall-thinning among the data on the amount of wall-thinning on July 1, 2029.

[0149] The future metal-thinning amount calculation unit 72 then outputs the calculation results of the recommended replacement time, recommended preparation time, and preparation threshold value described above to the calculation result storage unit 64. The calculation result storage unit 64 receives and stores the calculation results of the recommended replacement time, recommended preparation time, and preparation threshold value.

[0150] Here, if the calculation of the future thinning amount results in the thinning amount ratio not reaching 1.0 within the specified future calculation period, the recommended replacement time, recommended preparation time, and preparation threshold value cannot be obtained.

[0151] (About the thinning amount management device 18 at the time of introduction) First, the state of the wall-thinning amount management device 18 at the time of installation will be described.

[0152] When the wall-thinning amount management device 18 is introduced, the display information storage unit 66 stores display information regarding the past wall-thinning amount and the future wall-thinning amount as of the introduction date. That is, when the wall-thinning amount management device 18 is introduced, the display unit of the user interface 50 is capable of displaying the past wall-thinning amount and the future wall-thinning amount as of the introduction date.

[0153] That is, the display information storage unit 66 stores the display information as of the introduction date generated by the display information generation unit 73 based on the calculation results calculated by the fixed-period thinning amount calculation unit 71 and the future thinning amount calculation unit 72 stored in the calculation result storage unit 64, and information related to the template screen stored in the template storage unit 65.

[0154] The manufacturer processes the thinning amount management device 18 so that it is in the above-mentioned state on the day of installation.

[0155] 10 is a diagram showing an example of the display screen 100 on which display information is displayed as of the date of introduction of the metal loss amount management device 18 of the first embodiment. Here, an example of information related to the metal loss amount in the first-stage moving blade of the intermediate-pressure turbine 13 is shown. By pressing the selection button 107 of the selection display unit 106 of the display screen 100 of FIG. 10, a selection item for the moving blade is displayed in the selection display unit 106. Then, when the selection item "IP 1st stage blade" is selected, the display screen 100 shown in FIG. 10 is displayed on the screen of the display unit of the user interface 50. Note that a similar display screen is also displayed on the display screen displaying the information related to the metal loss amount in the first-stage moving blade of the high-pressure turbine 11.

[0156] As shown in FIG. 10 , the display screen 100 chronologically displays the past wall-thinning amount results (dashed lines) calculated by the periodic wall-thinning amount calculation unit 71 and the future wall-thinning amount results (solid lines) calculated by the future wall-thinning amount calculation unit 72. In a graph 101 showing these wall-thinning amount results, the horizontal axis indicates the year, month, and date, and the vertical axis indicates the wall-thinning amount ratio. Note that, in this example, January 1, 2024, is set to the present. In addition, in the graph 101, the wall-thinning amount is shown as a wall-thinning amount ratio. Here, the wall-thinning amount ratio is exemplified as a wall-thinning amount ratio when the wall-thinning amount of the inspection threshold is set to 1. Note that, hereinafter, the wall-thinning amount ratio shown on the display screen 100 is exemplified as a wall-thinning amount ratio when the wall-thinning amount of the inspection threshold is set to 1.

[0157] FIG. 10 shows a time axis from January 1, 2014 to January 1, 2034. The range of this time axis is set by selecting a setting value in the time axis setting section 102 of the display screen 100. Here, an example is shown in which the setting values ​​in the time axis setting section 102 are set to 5 years, 10 years, 15 years, and 20 years. In FIG. 10, 10 years is selected.

[0158] The time axis shows a set value of time from the present to the past and a set value of time from the present to the future. For example, if 10 years is selected as the set value as shown in Figure 10, the time range of the past 10 years from the present (January 1, 2024) to January 1, 2014 and the time range of the future 10 years from the present (January 1, 2024) to January 1, 2034 are displayed on the time axis.

[0159] In this way, the user can arbitrarily change the range of the time axis by selecting the setting value in the time axis setting section 102 .

[0160] Note that Fig. 10 shows the calculation results for the amount of wall-thinning from January 1, 2016 to January 1, 2032. In this case, the wall-thinning amount ratio from January 1, 2016 to January 1, 2024 is the wall-thinning amount ratio based on the past wall-thinning amount, and the wall-thinning amount ratio from January 1, 2024 to January 1, 2032 is the wall-thinning amount ratio based on the future wall-thinning amount.

[0161] Here, the wall-thinning amount ratio as of January 1, 2016 is shown based on the regular inspection results input from input screen 90 shown in Fig. 4. In graph 101 on display screen 100, the wall-thinning amount ratio based on the regular inspection results is indicated by a black circle. Note that even if there are calculation results from before the most recent regular inspection, for example, the display screen 100 shows calculation results from the most recent regular inspection onwards, and does not display calculation results from before the most recent regular inspection.

[0162] Furthermore, on the display screen 100, the inspection threshold is indicated by a dashed line as "Threshold 1." An alarm display 103 is displayed on the display screen 100. The alarm display 103 is displayed, for example, when the future amount of wall thinning or the past amount of wall thinning exceeds the inspection threshold. Note that since the inspection threshold is a default value stored as an initial value in the input information storage unit 61, "Threshold 1" is always displayed on the display screen 100.

[0163] In the calculation results shown in Fig. 10, the amount of future thinning has reached the inspection threshold, and therefore the recommended inspection time is displayed as an alarm display 103. Fig. 10 also shows an example of the alarm display 103 that displays the number of years from the present until the recommended inspection time.

[0164] 10, the display screen 100 of the user interface 50 displays the changes over time in the past and future amounts of wall-thinning on a single graph 101. In addition, if the future amount of wall-thinning exceeds the inspection threshold, the recommended inspection time is displayed on the display screen 100.

[0165] (Periodic thinning calculation processing) Next, a periodic metal-thinning amount calculation process in the metal-thinning amount management device 18 of the first embodiment will be described. Note that the description here is based on the premise that the amount of metal-thinning has not reached the inspection threshold value when the metal-thinning amount management device 18 is introduced.

[0166] The periodic thinning amount calculation process will be explained separately as a pre-inspection calculation process that is performed before the inspection based on the thinning amount reaching the inspection threshold, and a post-inspection calculation process that is performed after the inspection based on the thinning amount reaching the inspection threshold.

[0167] First, the pre-inspection calculation process will be described.

[0168] FIG. 11 is a flowchart for explaining a periodic metal loss calculation processing method in the metal loss management device 18 of the first embodiment.

[0169] 11, the fixed-period wall-thinning amount calculation unit 71 determines whether the steam turbine equipment 1 is operating (step S20) based on, for example, information stored in the measurement data storage unit 62. The fixed-period wall-thinning amount calculation unit 71 determines whether the steam turbine equipment 1 is operating based on, for example, electrical output information.

[0170] In the determination of step S20, when it is determined that the steam turbine equipment 1 is not operating (No in step S20), the fixed-period wall-thinning amount calculation process is terminated.

[0171] If it is determined in step S20 that the steam turbine equipment 1 is operating (Yes in step S20), the fixed-period metal loss calculation unit 71 reads out from the program memory unit 63 a program for calculating the past metal loss amount, an arithmetic formula and parameters for calculating the past metal loss amount, design information of the blades to be managed from the input information memory unit 61, and start count information and electrical output information stored in the measurement data memory unit 62 (step S21).

[0172] Subsequently, the fixed-cycle wall-thinning amount calculation unit 71 calculates the past wall-thinning amount by the calculation method described with reference to Fig. 6, and outputs the calculation result to the calculation result storage unit 64 (step S22). The calculation result storage unit 64 stores the calculation result.

[0173] The display information generation unit 73 generates display information based on the calculation results stored in the calculation result storage unit 64 and the information stored in the template storage unit 65 (step S23). Then, the display information generation unit 73 outputs the generated display information to the display information storage unit 66 and the user interface 50. The display information storage unit 66 stores the display information.

[0174] The user interface 50 displays the display information output from the display information generating unit 73 on the display unit as shown in FIG. 10 (step S24).

[0175] Here, the display information generating unit 73 outputs display information based on the calculation results to the display information storage unit 66 and the user interface 50 every hour. Therefore, the graph 101 showing the calculation results related to the past wall-thinning amount displayed on the display unit is updated every hour. For example, after calculating the past wall-thinning amount, the fixed-cycle wall-thinning amount calculating unit 71 repeats the processes of steps S20 to S24 every hour.

[0176] After the process of step S22, the fixed-cycle wall-thinning amount calculation unit 71 determines whether or not the past wall-thinning amount has reached the inspection threshold value based on the calculation result (step S25).

[0177] In the determination of step S25, when it is determined that the past wall-thinning amount has not reached the inspection threshold value (No in step S25), fixed-cycle wall-thinning amount calculation unit 71 executes the process of step S25 again.

[0178] In the determination in step S25, if it is determined that the past amount of wall-thinning has reached the inspection threshold (Yes in step S25), the fixed-period wall-thinning amount calculation unit 71 outputs information about the date on which the past amount of wall-thinning reached the inspection threshold (information about the recommended inspection timing) to the calculation result storage unit 64. The calculation result storage unit 64 stores the information.

[0179] The display information generation unit 73 generates display information based on the calculation results stored in the calculation result storage unit 64 and the information stored in the template storage unit 65 (step S26). Then, the display information generation unit 73 outputs the generated display information to the display information storage unit 66 and the user interface 50. The display information storage unit 66 stores the display information.

[0180] The user interface 50 updates the display screen based on the display information output from the display information generating unit 73 (step S27).

[0181] FIG. 12 is a diagram showing an example of a display screen 100 on which calculation results are displayed in the metal-thinning amount management device 18 of the first embodiment. FIG. 12 shows the display screen 100 on which calculation results are displayed from the day on which the past metal-thinning amount reached the inspection threshold to immediately before the operation of the steam turbine equipment 1 was stopped to perform inspection. As shown in FIG. 12, information on the recommended inspection timing is displayed in the alarm display 103. Note that, in the calculation results shown in FIG. 12, since the inspection has not yet occurred, a replacement threshold has not been set. Here, an example of information related to the metal-thinning amount in the first-stage moving blade of the intermediate-pressure turbine 13 is shown. Note that a similar display screen is also displayed on the display screen displaying information related to the metal-thinning amount in the first-stage moving blade of the high-pressure turbine 11.

[0182] Next, the post-inspection calculation process will be described.

[0183] Here, when the post-inspection calculation process is executed, the replacement threshold is set based on the amount of wall thinning measured during inspection. The replacement threshold is stored in the input information storage unit 61 by input from the manufacturer. Here, an example is shown in which the amount of wall thinning for the replacement threshold is set to twice the amount of wall thinning for the inspection threshold. Note that even if the amount of wall thinning actually measured during inspection does not reach the inspection threshold, if the amount of wall thinning predicted by calculation reaches the inspection threshold, the replacement threshold is set based on the actually measured amount of wall thinning. Even if the amount of wall thinning actually measured during inspection does not reach the inspection threshold, the post-inspection calculation process does not make a judgment based on the inspection threshold for the calculated amount of wall thinning.

[0184] FIG. 13 is a diagram showing an example of a display screen 100 showing the calculation results in the post-inspection calculation process of the metal-thickness reduction amount management device 18 according to the first embodiment. FIG. 13 shows an example in which the calculated future metal-thickness reduction amount reaches the replacement threshold. Therefore, the future metal-thickness reduction amount calculation unit 72 calculates the recommended replacement time, preparation threshold, and recommended preparation time based on the date when the replacement threshold will be reached, and outputs these to the calculation result storage unit 64. As a result, the calculation result storage unit 64 stores the recommended replacement time, preparation threshold, and recommended preparation time. The calculation methods for the recommended replacement time, preparation threshold, and recommended preparation time are as described above.

[0185] In graph 101 of Fig. 13, the inspection results are indicated by black circles. On display screen 100, the replacement threshold is indicated by a two-dot chain line as "Threshold 2," and the preparation threshold is indicated by a two-dot chain line (the two-dot chain line with a narrower gap) as "Threshold 3." The alarm display 103 displays the recommended replacement time and the recommended preparation time. As mentioned above, the metal loss ratio indicating the replacement threshold is illustrated as 2.0, which is twice the metal loss ratio indicating the inspection threshold.

[0186] FIG. 14 is a flowchart for explaining a periodic metal loss calculation processing method in the metal loss management device 18 of the first embodiment.

[0187] 14, the fixed-cycle wall-thinning amount calculation unit 71 determines whether the steam turbine equipment 1 is operating based on, for example, information stored in the measurement data storage unit 62 (step S30). Then, the fixed-cycle wall-thinning amount calculation unit 71 executes the processes of steps S30 to S34. Here, the processes of steps S30 to S34 are the same as the processes of steps S20 to S24 in FIG. 11, and therefore, description thereof will be omitted.

[0188] After the process of step S32, the periodic wall-thinning amount calculation unit 71 determines whether the past wall-thinning amount has reached the preparation threshold based on the calculation result (step S35). Here, when the past wall-thinning amount has reached the preparation threshold, it means that the past wall-thinning amount has reached the preparation threshold based on the future prediction calculated by the future wall-thinning amount calculation unit 72.

[0189] In the determination of step S35, when it is determined that the past wall-thickness reduction amount has not reached the preparation threshold value (No in step S25), the fixed-cycle wall-thickness reduction amount calculation unit 71 executes the process of step S35 again.

[0190] If it is determined in step S35 that the past thinning amount has reached the preparation threshold (Yes in step S35), the periodic thinning amount calculation unit 71 determines whether the past thinning amount has reached the replacement threshold based on the calculation result of step S32 (step S36).

[0191] If it is determined in step S36 that the past amount of thinning has not reached the replacement threshold (No in step S36), the periodic thinning amount calculation unit 71 outputs information about the date on which the past amount of thinning reached the preparation threshold (information about the recommended preparation timing) to the calculation result storage unit 64. The calculation result storage unit 64 stores this information.

[0192] The display information generation unit 73 generates display information based on the calculation results stored in the calculation result storage unit 64 and the information stored in the template storage unit 65 (step S37). Then, the display information generation unit 73 outputs the generated display information to the display information storage unit 66 and the user interface 50. The display information storage unit 66 stores the display information.

[0193] The user interface 50 updates the display screen (step S37) based on the display information output from the display information generating unit 73. This update updates the information about the recommended preparation time in the alarm display 103 shown in FIG.

[0194] If it is determined in step S36 that the past amount of thinning has reached the replacement threshold (Yes in step S36), the periodic thinning amount calculation unit 71 outputs information about the date on which the past amount of thinning reached the replacement threshold (information about the recommended replacement timing) and information about the recommended preparation timing to the calculation result storage unit 64. The calculation result storage unit 64 stores the information.

[0195] The display information generation unit 73 generates display information based on the calculation results stored in the calculation result storage unit 64 and the information stored in the template storage unit 65 (step S39). Then, the display information generation unit 73 outputs the generated display information to the display information storage unit 66 and the user interface 50. The display information storage unit 66 stores the display information.

[0196] The user interface 50 updates the display screen (step S40) based on the display information output from the display information generating unit 73. This update updates the information on the recommended replacement time and the recommended preparation time in the alarm display 103 shown in FIG.

[0197] The calculation of the past wall-thinning amount in the above-described fixed-period wall-thinning amount calculation unit 71 is performed, for example, every hour. Therefore, the information on the past wall-thinning amount on the display screen 100 is updated every hour. Note that, when the time range on the horizontal axis is the same, the information on the past wall-thinning amount in the graph 101 of FIG. 13 increases as time passes.

[0198] The periodic wall-thinning amount calculation process described above updates information related to the past wall-thinning amount on the display screen 100 shown in Figures 12 and 13. Furthermore, if the past wall-thinning amount has reached the preparation threshold or the replacement threshold, the information on the alarm display 103 is updated.

[0199] (Future thinning calculation) Next, a description will be given of the future wall-thinning amount calculation process in the wall-thinning amount management device 18 of the first embodiment. Note that the description will be given here on the assumption that the wall-thinning amount has not reached the inspection threshold value when the wall-thinning amount management device 18 is introduced.

[0200] The future thinning amount calculation process will be explained in two parts: pre-inspection calculation process that takes place before the inspection that is performed based on the thinning amount reaching the inspection threshold, and post-inspection calculation process that takes place after the inspection that is performed based on the thinning amount reaching the inspection threshold.

[0201] First, the pre-inspection calculation process will be described.

[0202] 15 is a flowchart for explaining a future wall-thinning amount calculation processing method in the wall-thinning amount management device 18 according to the first embodiment. Note that, since inspection has not yet been performed, a replacement threshold value has not been set.

[0203] Here, the future operating conditions shown in Fig. 3 are initially set on the installation date of the metal loss amount management device 18. After installation, the user inputs the future operating conditions in one-year increments from the input screen 80 shown in Fig. 3 in the user interface 50.

[0204] For example, by pressing the selection button 105 of the selection display unit 104 on the display screen 100 shown in Fig. 10, selection items of an input screen 80 for future operating conditions are displayed on the selection display unit 104, although this is not shown. When a selection item of the input screen 80 is selected on the selection display unit 104, the screen of the display unit of the user interface 50 switches to the input screen 80 for future operating conditions shown in Fig. 3. At this time, the display information generation unit 73 inputs information related to the selection on the input screen 80 from the user interface 50, and outputs display information for displaying the input screen 80 on the user interface 50.

[0205] After inputting the future driving conditions, the user presses the Save button 87 in Fig. 3. The user interface 50 receives the input from the Save button 87 and outputs information related to the future driving conditions to the input information storage unit 61. The input information storage unit 61 stores the information related to the future driving conditions. Note that the Back button 88 on the input screen 80 is a button that is pressed to return to the display screen 100 without pressing the Save button 87.

[0206] Furthermore, the future wall-thinning amount calculation unit 72 receives information from the user interface 50 in response to pressing of the Save button 87, and determines that future operating conditions have been input.

[0207] As shown in FIG. 15, the future wall-thinning amount calculation unit 72 determines whether or not future operating conditions have been input (step S50).

[0208] In the determination of step S50, if it is determined that the future operating conditions have not been input (No in step S50), future wall-thinning amount calculation unit 72 executes the process of step S50 again.

[0209] If it is determined in step S50 that future operating conditions have been input (Yes in step S50), the future thinning amount calculation unit 72 reads out a program for calculating the future thinning amount from the program memory unit 63, an arithmetic formula and parameters for calculating the future thinning amount, design information of the blade to be managed from the input information memory unit 61, and the future operating conditions stored in the input information memory unit 61 (step S51).

[0210] Next, the future wall-thinning amount calculation unit 72 determines whether or not a detailed operation mode setting is present by referring to the future operating conditions (step S52).

[0211] If it is determined in step S52 that a detailed operation mode setting is present (Yes in step S52), information relating to the operation time for each load category under future operating conditions, information relating to the availability rate, and information on the number of starts are read out (step S53).

[0212] Next, the future wall-thickness reduction amount calculation unit 72 calculates the future wall-thickness reduction amount by the calculation method described with reference to Fig. 7, and outputs the calculation result to the calculation result storage unit 64 (step S54). The calculation result storage unit 64 stores the calculation result.

[0213] The display information generation unit 73 generates display information based on the calculation results stored in the calculation result storage unit 64 and the information stored in the template storage unit 65 (step S55). Then, the display information generation unit 73 outputs the generated display information to the display information storage unit 66 and the user interface 50. The display information storage unit 66 stores the display information.

[0214] The user interface 50 displays the display information output from the display information generating unit 73 on the display unit as shown in FIG. 12 (step S56).

[0215] Here, the display information generating unit 73 outputs display information based on the calculation results to the display information storage unit 66 and the user interface 50 every time the calculation process for the future wall-thickness-reduction amount is executed in the future wall-thickness-reduction amount calculation unit 72. Therefore, the graph 101 showing the calculation results related to the future wall-thickness-reduction amount, which is displayed on the display unit, is updated every time the calculation process for the future wall-thickness-reduction amount is executed in the future wall-thickness-reduction amount calculation unit 72. In other words, the graph 101 showing the calculation results related to the future wall-thickness-reduction amount is updated every time information is received in response to pressing the Save button 87 on the input screen 80 for future operating conditions.

[0216] After the process of step S54, the future wall-thickness-reducing amount calculation unit 72 determines whether or not the future wall-thickness-reducing amount has reached the inspection threshold value based on the calculation result (step S57).

[0217] If it is determined in step S57 that the future wall-thinning amount has not reached the inspection threshold (No in step S57), the process of step S57 is executed again. Note that, when new future operating conditions are input and calculation is performed after it is determined in step S57 that the inspection threshold has been reached, it may be determined in step S57 of the calculation based on the new future operating conditions that the inspection threshold has not been reached. In this case, the future wall-thinning amount calculation unit 72 outputs information indicating that there is no recommended inspection time to the calculation result storage unit 64. Based on the calculation results stored in the calculation result storage unit 64 and the information stored in the template storage unit 65, the display information generation unit 73 generates display information in which the alarm display 103 indicating the recommended inspection time has been deleted from the display screen 100. The display information generation unit 73 outputs the generated display information to the display information storage unit 66 and the user interface 50. This update deletes the alarm display 103 indicating the recommended inspection time from the display screen 100.

[0218] If it is determined in step S57 that the future wall-thinning amount has reached the inspection threshold value (Yes in step S57), the future wall-thinning amount calculation unit 72 calculates the recommended inspection time by the method described with reference to Figures 8 and 9, and outputs the calculation result to the calculation result storage unit 64 (step S58). The calculation result storage unit 64 stores the recommended inspection time.

[0219] The display information generation unit 73 generates display information based on the calculation results stored in the calculation result storage unit 64 and the information stored in the template storage unit 65 (step S59). The display information generation unit 73 generates display information for updating the alarm display 103 on the display screen 100 shown in FIG.

[0220] Then, the display information generating unit 73 outputs the generated display information to the display information storage unit 66 and the user interface 50. The display information storage unit 66 stores the display information.

[0221] The user interface 50 updates the display screen based on the display information output from the display information generating unit 73 (step S60). As a result of this update, an alarm display 103 including the recommended inspection time based on the current calculation result is displayed on the display screen 100.

[0222] Next, the post-inspection calculation process will be described.

[0223] Here, when the post-inspection calculation process is executed, a replacement threshold value (for example, a metal-thinning amount ratio of 2.0 shown in FIG. 13) is determined as explained in the periodic metal-thinning amount calculation process. Until the calculated future metal-thinning amount reaches the replacement threshold value, the preparation threshold line is not displayed on graph 101, and the recommended replacement time and recommended preparation time are not displayed on alarm display 103. After the calculated future metal-thinning amount reaches the replacement threshold value, for example, as shown in FIG. 13, the replacement threshold line (Threshold 2: two-dot chain line) and the preparation threshold line (Threshold 3: the narrower two-dot chain line) are displayed on graph 101, and the recommended replacement time and recommended preparation time are displayed on alarm display 103.

[0224] FIG. 16 is a flowchart for explaining a future wall-thickness reduction amount calculation processing method in the wall-thickness reduction amount management device 18 according to the first embodiment.

[0225] As shown in Fig. 16, the future wall-thinning amount calculation unit 72 determines whether or not future operating conditions have been input (step S50). Then, the future wall-thinning amount calculation unit 72 executes the processes of steps S70 to S76. Here, the processes of steps S70 to S76 are the same as the processes of steps S50 to S56 in Fig. 15, and therefore, description thereof will be omitted.

[0226] After the process of step S74, the future wall-thickness-reducing amount calculation unit 72 determines whether or not the future wall-thickness-reducing amount has reached the replacement threshold value based on the calculation result (step S77).

[0227] If it is determined in step S77 that the future wall-thinning amount has not reached the replacement threshold (No in step S77), the process of step S77 is executed again. Note that when new future operating conditions are input and calculation is performed after it is determined in step S77 that the replacement threshold has been reached, it may be determined in step S77 of the calculation based on the new future operating conditions that the replacement threshold has not been reached. In this case, the future wall-thinning amount calculation unit 72 outputs information indicating that there is no recommended replacement time to the calculation result storage unit 64. Based on the calculation results stored in the calculation result storage unit 64 and the information stored in the template storage unit 65, the display information generation unit 73 generates display information in which the alarm display 103 indicating the recommended replacement time has been deleted from the display screen 100. The display information generation unit 73 outputs the generated display information to the display information storage unit 66 and the user interface 50. This update deletes the alarm display 103 indicating the recommended replacement time from the display screen 100.

[0228] If it is determined in step S77 that the future thinning amount has reached the replacement threshold value (Yes in step S77), the future thinning amount calculation unit 72 calculates the recommended replacement time and the recommended preparation time by the method described with reference to Figures 8 and 9, and outputs the calculation results to the calculation result storage unit 64 (step S78). The calculation result storage unit 64 stores the recommended replacement time and the recommended preparation time.

[0229] Next, the future wall-thinning amount calculation unit 72 calculates the preparation threshold value by the method described with reference to Figures 8 and 9, and outputs the preparation threshold value to the calculation result storage unit 64 (step S79). The calculation result storage unit 64 stores the preparation threshold value.

[0230] The display information generation unit 73 generates display information based on the calculation results stored in the calculation result storage unit 64 and the information stored in the template storage unit 65 (step S80). The display information generation unit 73 generates display information for displaying an alarm display 103 and a preparation threshold line of a graph 101 on a display screen 100, as shown in FIG.

[0231] Then, the display information generating unit 73 outputs the generated display information to the display information storage unit 66 and the user interface 50. The display information storage unit 66 stores the display information.

[0232] The user interface 50 updates the display screen based on the display information output from the display information generating unit 73 (step S81). As a result of this update, an alarm display 103 including the recommended replacement time and the recommended preparation time based on the current calculation result is displayed on the display screen 100. Furthermore, a line indicating the preparation threshold based on the current calculation result is displayed on the graph 101.

[0233] The calculation result of the future wall-thinning amount in the future wall-thinning amount calculation unit 72 is obtained for each year period set as the future operating conditions. That is, the calculation result in the future wall-thinning amount calculation unit 72 is obtained on a yearly basis.

[0234] In the future wall-thinning amount calculation process, the calculation process is repeated every time information is received in response to pressing the Save button 87 on the future operating condition input screen 80. The information on the future wall-thinning amount on the display screen 100 is updated every time information is received in response to pressing the Save button 87 on the future operating condition input screen 80.

[0235] The above-described future thinning amount calculation process updates information about the future thinning amount on the display screen 100 shown in Fig. 10 and Fig. 13. Information about the future thinning amount shown in graph 101, for example, changes depending on the future operating conditions. In addition, the recommended replacement timing, recommended preparation timing, and preparation threshold also change depending on the future operating conditions.

[0236] According to the above-described first embodiment of the metal-thinning amount management device 18, the past amount of metal-thinning from the past to the present predicted based on the operating data of the actual machine and the future amount of metal-thinning predicted based on the assumed operating conditions in the future can be displayed in chronological order on the display unit of the user interface 50 in graph 101. This allows the user to visually confirm the change in the amount of metal-thinning over time.

[0237] Furthermore, in the metal loss amount management device 18, lines representing the replacement threshold and the preparation threshold can be displayed on the graph 101 on the display screen 100. This allows the user to visually confirm the recommended replacement time and the recommended preparation time.

[0238] Furthermore, in the metal loss amount management device 18, the recommended replacement time and the recommended preparation time can be displayed on the display screen 100 as an alarm display 103. This allows the user to specifically recognize the recommended replacement time and the recommended preparation time. By specifically recognizing the recommended preparation time, the user can accurately request the manufacture of the blade to be replaced.

[0239] The metal-thinning amount management device 18 can display the calculation results of the future metal-thinning amount based on the operating conditions input on the future operating condition input screen 80. Therefore, by changing the operating conditions on the future operating condition input screen 80, the user can visually confirm the difference in the future metal-thinning amount depending on the operating conditions in the graph 101 on the display screen 100. In addition, the user can visually confirm the difference in the recommended replacement timing and the recommended preparation timing depending on the future operating conditions in the alarm display 103 on the display screen 100.

[0240] (Second embodiment) In the second embodiment, another example of information relating to the future wall-thinning amount displayed on the display unit of the user interface 50 will be described.

[0241] 17 and 18 are flowcharts for explaining a future metal-thinning amount calculation processing method in the metal-thinning amount management device 18 of the second embodiment. Note that, due to the configuration of the drawings, it is not possible to show the flowchart in one diagram, so the flowchart following No in step S70 in FIG. 17 is shown in FIG. 18. FIG. 19 is a diagram showing an example of a display screen 100A in the metal-thinning amount management device 18 of the second embodiment. Note that, in the second embodiment, the same components as those in the metal-thinning amount management device 18 of the first embodiment are assigned the same reference numerals, and duplicated explanations are omitted or simplified.

[0242] As with the display screen 100 of the first embodiment, the thickness reduction ratio shown on the display screen 100A is exemplified as a thickness reduction ratio when the thickness reduction amount of the inspection threshold is set to 1. As with the display screen 100, the display screen 100A also shows an example in which the thickness reduction ratio indicating the replacement threshold is set to twice the thickness reduction ratio indicating the inspection threshold.

[0243] The second embodiment differs from the wall-thinning amount management device 18 of the first embodiment in that the display screen 100A showing the wall-thinning amount calculation result can simultaneously display calculation results for other future operating conditions. This different configuration will be mainly described here. The periodic wall-thinning amount calculation process of the second embodiment is the same as the periodic wall-thinning amount calculation process of the first embodiment.

[0244] 17 and 18, the future wall-thickness-reduction amount calculation process in the second embodiment adds steps S90 to S95 to the future wall-thickness-reduction amount calculation process in the first embodiment. Here, the future wall-thickness-reduction amount calculation process will be described using as an example a display screen 100A that displays the post-inspection calculation process and the calculation results of the post-inspection calculation process.

[0245] Here, after inputting the future operating conditions, the user presses the Save button 87 in Fig. 3. In the future wall-thinning amount calculation process in the second embodiment, similarly to the future wall-thinning amount calculation process in the first embodiment, the user interface 50 receives input from the Save button 87 and outputs information related to the future operating conditions to the input information storage unit 61. The input information storage unit 61 stores the information related to the future operating conditions.

[0246] Furthermore, the future wall-thinning amount calculation unit 72 receives information from the user interface 50 in response to pressing of the Save button 87, and determines that future operating conditions have been input.

[0247] As shown in FIG. 17, the future wall-thinning amount calculation unit 72 determines whether or not future operating conditions have been input (step S70).

[0248] If it is determined in step S70 that the future operating conditions have been input (Yes in step S70), the processes from step S71 to step S76 are executed as described above. Then, as described above, after the process of step S76, the process of step S70 is executed.

[0249] On the other hand, if it is determined in step S70 that no future operating conditions have been input (No in step S70), as shown in Fig. 18, the display information generating unit 73 determines whether there is a request to display the results of calculations performed under other future operating conditions (comparison calculation results) (step S90). The comparison calculation results are calculation results that have already been predicted based on other future operating conditions and are stored in the calculation result storage unit 64. The other future operating conditions function as second future operating conditions, and the comparison calculation results function as second future wall-thinning amount-related information.

[0250] Here, FIG. 20 is a diagram showing an example of a selection screen 110 for selecting the comparison calculation result to be displayed on the user interface 50 in the metal loss amount management device 18 according to the second embodiment.

[0251] For example, by pressing the selection button 105 of the selection display unit 104 on the display screen 100 shown in Fig. 13, selection items on a selection screen 110 are displayed on the selection display unit 104, although this is not shown. When a selection item on the selection screen 110 is selected on the selection display unit 104, the screen on the display unit of the user interface 50 switches to the selection screen 110 shown in Fig. 20. At this time, the display information generation unit 73 receives information related to the selection on the selection screen 110 from the user interface 50 and outputs display information for displaying the selection screen 110 on the user interface 50.

[0252] 20, a list of already calculated calculation results stored in the calculation result storage unit 64 is displayed in the list display unit 111. Also shown here is an example of the list display unit 111 that also displays the date and time when the calculation results were stored in the calculation result storage unit 64. The list display unit 111 displays, for example, the file names of five calculation results in descending order of the date and time when they were stored in the calculation result storage unit 64. Note that the configuration displayed in the list display unit 111 is not limited to this. It is sufficient that the list display unit 111 displays a list of already calculated calculation results.

[0253] 20 shows an example of a comparison calculation result calculated based on future operating conditions within the past hour. Therefore, the comparison calculation results can be compared without updating the latest future wall-thinning amount. That is, when any of these comparison calculation results is displayed on graph 101 of display screen 100A, the starting point of the line indicating the future wall-thinning amount ratio in the comparison calculation result coincides with the starting point of the line indicating the latest future wall-thinning amount ratio, as shown in FIG.

[0254] The comparison calculation result may be a result calculated more than one hour ago. For example, if a comparison calculation result calculated several days ago is selected, the starting point of the line indicating the future wall-thinning amount ratio in the comparison calculation result will be shifted from the starting point of the line indicating the latest future wall-thinning amount ratio. Even if the starting points are shifted in this way, the change trend of the wall-thinning amount ratio in the future can be compared.

[0255] The user selects the file name of the calculation result that the user wants to display on the display screen 100 shown in Fig. 13 as the comparison calculation result from the list displayed in the list display section 111. Then, the user presses the Load button 112. When the user presses the Load button 112, the screen switches to a display screen 100A showing the calculation result shown in Fig. 19.

[0256] The Back button 114 on the selection screen 110 is a button that is pressed to return to the display screen 100 without pressing the Load button 112 or the Reset button 113.

[0257] The display information generating unit 73 receives a signal from the user interface 50 based on the pressing of the Load button 112, and determines in step S90 that there is a request to display the comparison calculation result.

[0258] If it is determined in step S90 that there is a request to display the comparison calculation result (Yes in step S90), the display information generation unit 73 generates display information based on the calculation result stored in the calculation result storage unit 64 and the information stored in the template storage unit 65 (step S91). Here, the display information generation unit 73 reads out both the calculation result based on the future driving conditions stored in the calculation result storage unit 64 and the selected comparison calculation result. Then, the display information generation unit 73 outputs the generated display information to the display information storage unit 66 and the user interface 50. The display information storage unit 66 stores the display information.

[0259] The user interface 50 displays the display information output from the display information generating unit 73 on the display unit as shown in Fig. 19 (step S92). As shown in Fig. 19, both the calculation result based on the future operating conditions and the comparison calculation result are displayed as the future wall-thinning amount on the display screen 100A.

[0260] Specifically, the metal loss ratio for each calculation result is displayed in chronological order, and the preparation threshold line for each calculation result is also displayed. The metal loss ratio for the comparison calculation result is displayed by a dashed line, and the preparation threshold line (Threshold 3) for the comparison calculation result is displayed by a broken line. In addition, the recommended replacement time and recommended preparation time for each calculation result are displayed as an alarm display 103. As shown in FIG. 19, the metal loss ratio for past metal loss amounts is also displayed in chronological order.

[0261] In addition, the preparation threshold in the comparison calculation result functions as a second preparation threshold, the recommended replacement time in the comparison calculation result functions as a second recommended replacement time, and the recommended preparation time in the comparison calculation result functions as a second recommended preparation time.

[0262] If it is determined in step S90 that there is no request to display the comparison operation result (No in step S90), the display information generating unit 73 determines whether there is a request to delete the display of the comparison operation result (step S93).

[0263] Here, the user can delete the comparison calculation result shown on the display screen 100A of Fig. 19 by pressing the Reset button 113 on the selection screen 110 of Fig. 20. The display information generating unit 73 receives a signal based on the pressing of the Reset button 113 from the user interface 50, and determines in step S93 that there is a request to delete the display of the comparison calculation result. When the user presses the Reset button 113, the screen switches to a display screen showing the calculation result.

[0264] If it is determined in step S93 that there is a request to delete the display of the comparison calculation result (Yes in step S93), the display information generation unit 73 generates display information based on the calculation result stored in the calculation result storage unit 64 and the information stored in the template storage unit 65 (step S94). Here, the display information generation unit 73 reads out the calculation result based on the future driving conditions stored in the calculation result storage unit 64. Then, the display information generation unit 73 outputs the generated display information to the display information storage unit 66 and the user interface 50. The display information storage unit 66 stores the display information.

[0265] The user interface 50 displays the display information output from the display information generating unit 73 on the display unit as shown in Fig. 13 (step S95). That is, as shown in Fig. 13, the comparison calculation results are deleted from the display screen 100, and only the calculation results based on the future operating conditions are displayed.

[0266] In the determination at step S93, if it is determined that there is no request to delete the display of the comparison operation result (No at step S93), the process returns to step S70.

[0267] 17, after the process of step S74, the future wall-thinning amount calculation unit 72 determines whether the wall-thinning amount has reached the replacement threshold based on the calculation result of step S74 (step S77), as described above. Then, the processes of steps S77 to S81 are executed as described above.

[0268] The information on the future thinning amount on the display screen 100A is updated each time information is received in response to pressing the Save button 87 on the input screen 80 for future operating conditions, and the Load button 112 or Reset button 113 on the selection screen 110 for comparison calculation results.

[0269] Although an example in which one operation result is selected as the comparison operation result has been shown here, it may be set so that a plurality of comparison operation results can be selected.

[0270] According to the metal-thickness reduction amount managing device 18 of the second embodiment described above, the same effects as those of the metal-thickness reduction amount managing device 18 of the first embodiment can be obtained.

[0271] Furthermore, according to the second embodiment of the metal thinning amount management device 18, both the calculation result predicted based on future operating conditions and the comparison calculation result can be displayed on the display screen 100A as the future metal thinning amount.

[0272] This allows the user to visually confirm the difference between the amount of wall-reduced metal in the calculation result based on future operating conditions and the amount of wall-reduced metal in the comparison calculation result in graph 101 on display screen 100A. In addition, the user can visually confirm the difference between the recommended replacement timing and recommended preparation timing in the calculation result based on future operating conditions and the recommended replacement timing and recommended preparation timing in the comparison calculation result in alarm display 103 on display screen 100A.

[0273] According to the embodiment described above, it is possible to recognize, in chronological order, the amount of wall thinning from the past to the present predicted based on operating data and the amount of wall thinning in the future predicted based on future operating conditions.

[0274] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0275] 1...Steam turbine equipment, 10...Boiler, 11...High-pressure turbine, 12...Reheater, 13...Intermediate-pressure turbine, 14...Low-pressure turbine, 15...Generator, 16...Condenser, 17...Feedwater pump, 18...Thinning amount management device, 20...Main steam pipe, 21...Low-temperature reheat steam pipe, 22...High-temperature reheat steam pipe, 23...Crossover pipe, 24...Exhaust pipe, 25...Feedwater pipe, 30...Output detector, 40...Measurement data acquisition unit, 50...User interface, 60...Memory unit, 61...Input information memory unit, 62...Measurement data memory unit, 63...Program memory unit, 64...Calculation result memory unit, 65...Temperature Rate memory unit, 66...display information memory unit, 70...calculation unit, 71...fixed-period wall-thinning amount calculation unit, 72...future wall-thinning amount calculation unit, 73...display information generation unit, 80, 90, 90A, 90B...input screen, 81...selection pattern, 82...past operation performance mode, 83...base load operation mode, 84...peak load operation mode, 85...detailed operation setting mode, 86...operation data, 87...save button, 88, 96, 114...back button, 89...startup plan, 91, 92, 93, 98, 99...numerical field, 94...upload button, 95...all Delete button, 97, 104, 106...selection display section, 97a, 105, 107...selection button, 100, 100A...display screen, 101...graph, 102...time axis setting section, 103...alarm display, 110...selection screen, 111...list display section, 112...Load button, 113...Reset button.

Claims

1. 1. A steam turbine blade wall thinning amount management device for managing a wall thinning amount of a first stage blade caused by solid particles contained in working steam, comprising: a display information generating unit that generates display information for displaying on a display unit past metal-thinning amount related information indicating information regarding past metal-thinning amounts of the first stage rotor blade of the steam turbine from the past to the present, which is calculated based on electrical output information of a generator, and future metal-thinning amount related information indicating information regarding a future metal-thinning amount of the first stage rotor blade in the future, which is calculated based on future operating conditions input through an operation using a user interface screen and the past metal-thinning amount related information, 1. A steam turbine blade wall thinning amount management device, wherein the future operating conditions include the number of starts for each start mode, including a cold start.

2. The display information generation unit 2. The steam turbine blade wall thinning amount management device according to claim 1, wherein the display information is generated so that both the information about the past wall thinning amount and the information about the future wall thinning amount are displayed on the display unit in chronological order.

3. The display information generation unit 2. The steam turbine blade wall thinning amount management device according to claim 1, wherein the display information is generated to display the past wall thinning amount related information on the display unit at predetermined time intervals.

4. The display information generation unit 2. The steam turbine blade wall thinning amount management device according to claim 1, wherein the display information for displaying the future wall thinning amount related information on the display unit is generated each time the future operating conditions are input.

5. The display information generation unit 2. The steam turbine blade wall thinning amount management device according to claim 1, wherein the display information is generated to display on the display unit a recommended inspection time for inspecting the first stage blade, the recommended inspection time being calculated based on the future amount of thinning.

6. The display information generation unit 2. The steam turbine blade wall thinning amount management device according to claim 1, wherein the display information is generated to display on the display unit a recommended replacement time for the first stage blade, the recommended replacement time being calculated based on the future amount of thinning.

7. The display information generation unit 2. The steam turbine blade wall thinning amount management device according to claim 1, wherein the display information is generated to display on the display unit information related to a preparation threshold that indicates an amount of wall thinning at which it is recommended to start preparation of a new first stage blade, the preparation threshold being calculated based on the future amount of wall thinning.

8. The display information generation unit 2. The steam turbine blade wall thinning amount management device according to claim 1, wherein the display information is generated to display on the display unit a recommended preparation time for starting preparation of a new first stage blade, the recommended preparation time being calculated based on the future amount of thinning.

9. The display information generation unit generating the display information for displaying, on the display unit, second future metal-thinning amount-related information indicating information regarding a second future metal-thinning amount of the first stage rotor blade in the future calculated based on second future operating conditions input through an operation using a user interface screen and the past metal-thinning amount-related information; 2. The steam turbine blade wall thinning amount management device according to claim 1, wherein the second future operating conditions include a second number of startups for each startup mode including a cold startup.

10. The display information generation unit 10. The steam turbine blade wall thinning amount management device according to claim 9, wherein the display information is generated to display on the display unit a second recommended inspection time at which inspection of the first stage blade is recommended, the second recommended inspection time being calculated based on the second future wall thinning amount.

11. The display information generation unit 10. The steam turbine blade metal-thinning amount management device according to claim 9, wherein the display information is generated to cause the display unit to display information related to a second preparation threshold that indicates an amount of metal-thinning at which it is recommended to start preparation of a new first stage blade, the second preparation threshold being calculated based on the second future metal-thinning amount.

12. The display information generation unit 10. The steam turbine blade wall thinning amount management device according to claim 9, wherein the display information is generated to display on the display unit a second recommended preparation time at which it is recommended to start preparation of a new first stage blade, the second recommended preparation time being calculated based on the second future wall thinning amount.

13. The display information generation unit 10. The steam turbine blade wall thinning amount management device according to claim 9, wherein the display information is generated to display on the display unit a second recommended replacement time at which it is recommended to replace the first stage blade, the second recommended replacement time being calculated based on the second future wall thinning amount.

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