Rotating machine monitoring control device, rotating machine apparatus, rotating machine monitoring control method, and computer program product

Abstract

A monitoring control device for monitoring or controlling a gap of a rotary machine including a machine chamber that houses a rotating portion and a stationary portion, the monitoring control device including: an acquisition portion configured to acquire a plurality of temperatures at a plurality of positions of the machine chamber; and an index calculation portion configured to calculate, from the plurality of temperatures, an index indicating displacement in a vertical direction of the machine chamber.

Description

Technical Field

[0001] This invention relates to a monitoring and control device for rotating machinery, rotating machinery equipment, a monitoring and control method for rotating machinery, and a monitoring and control program for rotating machinery.

[0002] This application claims priority based on Japanese Patent Application No. 2021-189121 filed with the Japan Patent Office on November 22, 2021, the contents of which are incorporated herein by reference. Background Technology

[0003] In rotating machinery, which includes a housing (shell) accommodating both rotating and stationary parts, the housing may move vertically due to temperature differences at various locations within it, sometimes causing changes in the clearance between the rotating and stationary parts. To prevent contact between the rotating and stationary parts, it is important to maintain the clearance within an appropriate range.

[0004] For example, Patent Document 1 describes the following: In order to properly maintain the gap between the rotating body and the stationary part when the casing of the steam turbine undergoes thermal deformation, the deformation of the casing is estimated based on the measurement values ​​taken by thermometers respectively installed in the upper and lower parts of the casing, and the position of the casing in the height direction is adjusted based on the estimation results.

[0005] Patent document 2 describes the following: In order to prevent deformation of the housing when the gas turbine stops and to prevent the rotor from contacting the housing, the temperatures of the top and bottom of the housing are measured respectively, and when these temperature differences reach a threshold, the upper part of the housing is cooled.

[0006] Previous technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2010-270646

[0009] Patent Document 2: Japanese Patent Application Publication No. 6-26364 Summary of the Invention

[0010] The technical problem to be solved by the invention

[0011] If a quantity (such as temperature) representing the state of the machine room of rotating machinery can be used to obtain an index representing the vertical displacement of the machine room, then the gap between the rotating part and the stationary part can be monitored or controlled more appropriately, and the contact between the rotating part and the stationary part can be effectively suppressed.

[0012] In view of the above, the object of at least one embodiment of the present invention is to provide a monitoring and control device, a rotating machinery device, a monitoring and control method for rotating machinery, and a monitoring and control program for rotating machinery that can more appropriately monitor or control the gap between the rotating part and the stationary part.

[0013] means for solving technical problems

[0014] A monitoring and control device for rotating machinery according to at least one embodiment of the present invention is used to monitor or control the clearance of rotating machinery including a machine room housing a rotating part and a stationary part, the monitoring and control device comprising: The acquisition unit is configured to acquire multiple temperatures at multiple locations within the machine room; and The index calculation unit is configured to calculate an index representing the vertical displacement of the machine room based on the plurality of temperatures.

[0015] Furthermore, the rotating mechanical device according to at least one embodiment of the present invention comprises: Rotating machinery, including a machine room housing the rotating part and the stationary part; and The aforementioned monitoring and control device is used to monitor or control the clearance of the rotating machinery.

[0016] Furthermore, at least one embodiment of the present invention relates to a monitoring and control method for rotating machinery for monitoring or controlling the clearance of rotating machinery including a machine room housing a rotating part and a stationary part, the monitoring and control method comprising the following steps: Obtain multiple temperatures at multiple locations within the machine room; and Based on the multiple temperatures, an index representing the vertical displacement of the machine room is calculated.

[0017] Furthermore, the monitoring and control program for rotating machinery according to at least one embodiment of the present invention is used to monitor or control the clearance of rotating machinery, including a machine room housing a rotating part and a stationary part. The monitoring and control program is configured to cause the computer to perform the following steps: Obtain multiple temperatures at multiple locations within the machine room; and Based on the multiple temperatures, an index representing the vertical displacement of the machine room is calculated.

[0018] Invention Effects

[0019] According to at least one embodiment of the present invention, a monitoring and control device, a rotating machinery device, a monitoring and control method for rotating machinery, and a monitoring and control program for rotating machinery are provided, which are capable of more appropriately monitoring or controlling the gap between the rotating part and the stationary part. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a rotating machinery device according to one embodiment, including a steam turbine (rotating machinery).

[0021] Figure 2 It is along Figure 1A schematic axial cross-sectional view of the steam turbine shown.

[0022] Figure 3 This is a schematic structural diagram of a monitoring and control device according to one embodiment.

[0023] Figure 4 This is a flowchart of a monitoring and control method for rotating machinery according to one embodiment. Detailed Implementation

[0024] Hereinafter, several embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the constituent parts described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples.

[0025] (Structure of rotating machinery)

[0026] Figure 1 This is a schematic diagram of a rotating machinery device according to one embodiment, which is a schematic diagram of a rotating machinery device including a steam turbine as an example of rotating machinery. Figure 2 It is along Figure 1 A schematic axial cross-sectional view of the steam turbine shown. Figure 3 This is a schematic structural diagram of a monitoring and control device according to one embodiment.

[0027] Some embodiments of the rotating machinery 100 include: a steam turbine (rotating machinery) 1 (reference) Figure 1 and Figure 2 ); and monitoring and control device 50 (reference) Figure 3 ), used to monitor or control the clearance between the rotating part and the stationary part of the steam turbine 1.

[0028] like Figure 1 and Figure 2 As shown, the steam turbine 1 includes: a rotor 12 (in Figure 1 (not shown in the figure), capable of rotating about the central axis O; and an outer chamber (chamber) 2, which houses the rotating part and the stationary part including the rotor 12.

[0029] The outer chamber 2 includes an upper chamber 3 and a lower chamber 4, located below the upper chamber 3 in the vertical direction (i.e., the plumb line). The upper chamber 3 includes an upper housing 3a and an upper flange 3b. The lower chamber 4 includes a lower housing 4a and a lower flange 4b. The upper flange 3b of the upper chamber 3 and the lower flange 4b ​​of the lower chamber 4 are fastened together by bolts (not shown).

[0030] The outer chamber 2 is supported by a chamber support 8 fixed to the base 10. In the illustrated embodiment, the upper half 3 of the chamber has a protrusion 6 (also called a cat's foot) projecting axially (in the direction of the rotor's central axis O), which rests on the chamber support 8. Thus, the outer chamber 2 is supported by the chamber support 8 via the protrusion 6. Furthermore, in Figure 1 In the outer machine room 2 shown, in the upper half 3 of the machine room, a pair of protrusions 6 are provided on both sides of the central axis O when viewed from above, that is, a total of 4 protrusions 6 are provided.

[0031] like Figure 2 As shown, the rotating part housed in the outer chamber 2 includes a rotor 12 and a plurality of rotating blades 14 disposed on the rotor 12 in a radially projecting manner. Figure 2 As shown, the rotor 12 is configured to penetrate the outer chamber 2. Furthermore, the rotor 12 is rotatably supported by bearings housed in a bearing base 26 fixed to the base 10.

[0032] like Figure 2 As shown, the stationary part housed in the outer chamber 2 includes an inner chamber 16 supported by the outer chamber 2, a blade ring 18 supported by the inner chamber 16, a fixed blade 19, and a balance ring 20. In addition, the fixed blade 19 is supported by the inner chamber 16 via the blade ring 18 and is positioned axially upstream of the rotating blade 14 of each segment.

[0033] The steam turbine 1 has steam inlets 28 and 29 for introducing steam into the interior of the steam turbine 1. Furthermore, sealing portions 22 are provided at both ends of the outer chamber 2 in the axial direction to suppress leakage of fluid through the gap between the outer chamber 2 and the rotor 12.

[0034] Inside the steam turbine 1, a clearance is formed between the radially rotating part and the stationary part. The clearance is, for example, the clearance between the front end of the rotating blade 14 and the blade ring 18, the clearance between the rotor 12 and the front end of the stationary blade 19, or the clearance between the rotor 12 and the sealing fins (not shown) provided on the balance ring 20.

[0035] In some embodiments, the rotating machinery 100 includes temperature sensors for measuring the temperature at multiple locations within the machine room. Figure 1 In the exemplary embodiment shown, a plurality of temperature sensors 30A-1 to 30F-2 (hereinafter also collectively referred to as temperature sensors 30) are provided in the steam turbine 1, which are configured to measure the temperature at multiple locations in the outer machine room 2.

[0036] In some embodiments, the plurality of temperature sensors 30 includes at least one temperature sensor for measuring the temperature of the upper housing 3a (e.g., Figure 1 Temperature sensors 30B-1, 30C-1, 30E-1, and 30F-1 are included.

[0037] In some embodiments, the plurality of temperature sensors 30 includes at least one temperature sensor for measuring the temperature of the lower housing 4a (e.g., Figure 1 Temperature sensors 30B-3, 30C-3, 30E-3, and 30F-2 are included.

[0038] In some embodiments, the plurality of temperature sensors 30 includes at least one temperature sensor for measuring the temperature of the upper flange 3b (e.g., Figure 1 Temperature sensors 30A-1, 30B-2, 30D-1, and 30E-2 are included.

[0039] In some embodiments, the plurality of temperature sensors 30 includes at least one temperature sensor for measuring the temperature of the lower flange 4b ​​(e.g., Figure 1 Temperature sensors 30C-2 and 30D-2 are included.

[0040] Figure 1 straight line L in A ~L F It is a straight line indicating the axial position, representing temperature sensors located on the same straight line (e.g., line L). B The temperature sensors 30B-1 to 30B-3 are located at the same position in the axial direction. Additionally, Figure 1 The configuration of the temperature sensor 30 shown is for illustrative purposes only; the axial positions of several of the multiple temperature sensors 30 do not need to be the same.

[0041] In some embodiments, the rotating machinery 100 may include a temperature sensor for measuring the temperature of the machine room support 8. Figure 1 In the exemplary embodiment shown, temperature sensors 32a and 32b (hereinafter also collectively referred to as temperature sensors 32) are provided in the steam turbine 1 to measure the temperature of the machine room support 8.

[0042] In some embodiments, the rotating machinery 100 may also include a temperature sensor for measuring the temperature of the bearing housing 26. Figure 1 In the exemplary embodiment shown, temperature sensors 34a and 34b (hereinafter also collectively referred to as temperature sensors 34) configured to measure the temperature of bearing platform 26 are provided in the steam turbine 1.

[0043] In some embodiments, the rotating machinery 100 may also include a speed sensor 36 for measuring the rotational speed of the rotor 12 (see reference). Figure 2 ).

[0044] Signals representing the measured values ​​obtained by the temperature sensors 30, 32, 34 and the speed sensor 36 are sent to the monitoring and control device 50, which will be described later.

[0045] In some embodiments, the rotating machinery 100 includes a temperature regulating unit 60 for heating or cooling at least a portion of the outer chamber 2 or the chamber support 8. By heating or cooling at least a portion of the outer chamber 2 or the chamber support 8 through the temperature regulating unit 60, the thermal expansion of the outer chamber 2 or the chamber support 8 can be adjusted, thereby allowing adjustment of the shape or position of the outer chamber 2. Therefore, by appropriately adjusting the shape or position of the outer chamber 2 through the temperature regulating unit 60, the internal clearance of the steam turbine 1 can be maintained within an appropriate range.

[0046] In one implementation, for example, Figure 1 As shown, the temperature regulating unit 60 includes a heating unit 62 for heating the machine room support 8 that supports the outer machine room 2. By heating the machine room support 8 with the heating unit 62, the position of the outer machine room 2 is changed, so that the machine room support 8 thermally elongates in the plumb direction, and the outer machine room 2 is raised.

[0047] The heating element 62 can be configured as a heater that uses electrical energy to generate heat. Figure 1 In the exemplary embodiment shown, the heating element 62 includes a plate-shaped heater disposed on the surface of the machine compartment support 8. Alternatively, when both the temperature sensor 32 and the heating element 62 are disposed on the machine compartment support 8, the temperature sensor 32 and the heating element 62 can be disposed separately. For example, the temperature sensor 32 and the heating element 62 can be disposed on surfaces of the machine compartment support 8 that face different directions from each other.

[0048] In one implementation, for example, Figure 1 As shown, the temperature regulating unit 60 includes a cooling unit 64 for cooling the protrusion 6 of the outer chamber 2. By cooling the protrusion 6 with the cooling unit, the outer chamber 2 is deformed, causing the outer chamber 2 to sink.

[0049] The cooling section 64 can also be configured to supply cooling fluid to the protrusion 6. Figure 1 In the exemplary embodiment shown, the cooling section 64 includes a nozzle configured to spray air as a cooling fluid toward the protrusion 6.

[0050] Alternatively, the temperature control unit 60 may also include a cooling unit disposed on the upper housing 3a of the outer chamber 2, configured to supply cooling fluid. By cooling the upper housing 3a with the cooling unit, the outer chamber 2 is deformed, causing the outer chamber 2 to sink.

[0051] The monitoring and control device 50 is configured to receive and process signals from temperature sensors 30, 32, 34 and / or speed sensor 36. For example... Figure 3 As shown, the monitoring and control device 50 according to one embodiment includes an acquisition unit 52, an index calculation unit 54, and a control unit 56.

[0052] The acquisition unit 52 is configured to receive signals representing the measured values ​​based on each sensor from the temperature sensors 30, 32, 34 and / or the speed sensor 36.

[0053] The index calculation unit 54 is configured to calculate an index representing the vertical displacement of the outer chamber 2 (chamber) based on multiple temperatures acquired by the acquisition unit 52.

[0054] The control unit 56 is configured to adjust the shape or position of the outer machine room 2 (machine room) according to the index calculated by the index calculation unit 54.

[0055] Furthermore, the monitoring and control device 50 includes a computer, which has a processor (CPU, etc.), a storage device (memory device; RAM, etc.), an auxiliary storage unit, and an interface. The monitoring and control device 50 receives signals from the aforementioned temperature sensors 30, 32, 34 and / or the speed sensor 36 via the interface. The processor is configured to process the received signals. Furthermore, the processor is configured to process programs running in the storage device. Thus, the functions of each of the aforementioned functional units (acquisition unit 52, indicator calculation unit 54, and control unit 56) are realized.

[0056] The processing content in the monitoring and control device 50 is installed as a program executed by the processor. The program may also be stored in an auxiliary storage unit. When the program is executed, it is expanded in the storage device. The processor reads the program from the storage device and executes the commands contained within the program.

[0057] In the monitoring and control device 50 with the above-described structure, an index representing the vertical displacement of the outer machine chamber 2 can be calculated based on multiple temperatures at multiple locations within the outer machine chamber 2 (chamber). Therefore, based on this calculated index, the gap between the rotating and stationary parts can be monitored or controlled more appropriately. Furthermore, the temperature of the outer machine chamber 2 can be obtained using a simple structure that includes a temperature sensor 30. Thus, in the above-described structure, an index representing the vertical displacement of the outer machine chamber 2 can be calculated using a simple structure, and the gap can be monitored or controlled appropriately based on the calculated index.

[0058] (Monitoring and control process for rotating machinery)

[0059] Next, the flow of the monitoring and control method for rotating machinery according to some embodiments will be described. In addition, the following describes the case of monitoring and controlling the steam turbine 1 using the monitoring and control device 50 described above, but the rotating machinery to be monitored and controlled is not limited to the steam turbine 1 described above, and some or all of the steps described below can be performed manually.

[0060] Figure 4 This is a flowchart of a monitoring and control method for rotating machinery according to one embodiment.

[0061] In one embodiment, the acquisition unit 52 first acquires multiple temperatures at multiple locations in the outer chamber 2 (chamber) (S2). The acquisition unit 52 can acquire the multiple temperatures by receiving signals representing measurements based on multiple temperature sensors 30.

[0062] In the following description, the temperature measurement value based on the temperature sensor 30 described above will be represented by T. For example, the temperature measurement value based on temperature sensor 30A-1 will be represented as T. A1 The measured value based on the temperature sensor 30F-2 is expressed as T. F2 The same applies to other temperature sensors 30.

[0063] In step S2, the acquisition unit 52 may acquire the temperature of the machine room support 8 (based on the measurement value of the temperature sensor 32), the temperature of the bearing platform 26 (based on the measurement value of the temperature sensor 34), and / or the rotational speed of the rotor 12 (based on the measurement value of the rotational speed sensor 36) as needed (i.e., for the purpose of index calculation in the subsequent step S4).

[0064] Next, the index calculation unit 54 calculates the CCI (Clearance Control Index) (S4), which represents the vertical displacement of the outer machine chamber 2, based on the multiple temperatures of the outer machine chamber 2 obtained in step S2. In step S4, in addition to the multiple temperatures of the outer machine chamber 2, the aforementioned CCI can also be obtained based on the temperature of the machine chamber support 8, the temperature of the bearing platform 26, or the rotational speed of the rotor 12 obtained in step S2.

[0065] The index CCI, which represents the vertical displacement of the outer machine room 2, can be expressed, for example, by the following formula (A).

[0066] CCI=k1×I1+k2×I2+k3×I3+k4×I4+k5×I5+k6×I6+C A…(A)

[0067] If the index CCI is greater than zero, it means that the outer machine room 2 has shifted to a higher position than the reference position. If the index CCI is less than zero, it means that the outer machine room 2 has shifted to a lower position than the reference position.

[0068] In the above formula (A), k1 to k6 represent coefficients.

[0069] Here, the coefficient k in the above equation (A) is... n with I n product (k) n ×I n ) is called the nth term. As explained below, I n This refers to the temperature or temperature difference in the outer chamber 2. In other words, the CCI index can be expressed using a linear combination of multiple temperatures at multiple locations in the outer chamber 2.

[0070] In the first term of equation (A) above, I1 represents the temperature difference between the upper shell 3a and the lower shell 4a of the outer chamber 2. If the upward displacement of the outer chamber 2 is positive, then the coefficient k1 in the first term is positive. If the temperature of the upper shell 3a is higher than that of the lower shell 4a, the outer chamber 2 deforms by lifting its central portion in the axial direction, and the outer chamber 2 displaces upward. The first term represents this displacement of the outer chamber 2.

[0071] The measurement positions for the temperature of the upper housing 3a and the lower housing 4a used to calculate I1 are preferably close in the axial direction. I1 can be, for example, T. B1 With T B3 The difference (T) B1 -T B3 ), T C1 With T C3 The difference (T) C1 -T C3 ) or T F1 With T F2 The difference (T) F1 -T F2 Alternatively, it can be a linear combination of two or more of them (e.g., k). B ×(T B1 -T B2 )+k C ×(T C1 -T C3 )+k F ×(T F1 -T F2 ), where k B k C and k F (For coefficients).

[0072] In the second term of equation (A) above, I2 represents the temperature difference between the shell portion (upper shell 3a or lower shell 4a) and the flange portion (upper flange 3b or lower flange 4b) of the outer chamber 2. If the upward displacement of the outer chamber 2 is positive, then the coefficient k2 in the second term is positive. If the temperature of the shell portion is higher than the temperature of the flange portion, a deformation occurs where the central portion of the side wall of the outer chamber 2 is recessed axially, and the protrusion 6 protruding axially from the outer chamber 2 contacts the chamber support 8 on one side, causing the upper half 3 of the chamber to lift (i.e., the outer chamber 2 is displaced upwards). The second term represents this displacement of the outer chamber 2.

[0073] The measurement positions for the shell temperature and the flange temperature used to calculate I2 are preferably close in the axial direction. The measurement positions for the shell temperature and the flange temperature used to calculate I2 are preferably located at positions where the temperature difference between the shell and the flange is relatively large (e.g., positions close to the steam inlet portions 28 and 29 in the axial direction).

[0074] I2 can be, for example, T. C1 With T C2 The difference (T) C1 -T C2 ), T C3 With T C2 The difference (T) C3 -T C2 ), T C1 and T C3 The average of T C2 The difference (T) C1 +T C3 ) / 2-T C2 ), T E1 With T E2 The difference (T) E1 -T E2 ), T E3 With T E2 The difference (T) E3 -T E2 ) or T E1 and T E3 The average of T E2 The difference (T) E1 +T E3 ) / 2-T E2 Alternatively, it could be a linear combination of two or more of them (e.g., k). c ×[(T C1 +T C3 ) / 2-T C2 ]+k e ×[(T E1 +T E3 ) / 2-T E2], where k c k e (For coefficients).

[0075] In the third term of equation (A) above, I3 represents the temperature difference between the upper flange 3b and the lower flange 4b ​​of the outer chamber 2. If the upward displacement of the outer chamber 2 is positive, then the coefficient k3 in the third term is positive. If the temperature of the upper flange 3b is higher than that of the lower flange 4b, the outer chamber 2 deforms by lifting its central portion in the axial direction, and the outer chamber 2 displaces upward. The third term represents this displacement of the outer chamber 2.

[0076] The measurement positions for calculating the temperature of the upper flange 3b and the lower flange 4b ​​of I3 are preferably close in the axial direction. I3 can be, for example, T. D1 With T D2 The difference (T) D1 -T D2 ), T D1 With T C2 The difference (T) D1 -T C2 ) or T E2 With T D2 The difference (T) E2 -T D2 ( ), or it can be a linear combination of two or more of them.

[0077] In the fourth term of equation (A) above, I4 represents the value of the thermal expansion in the vertical direction of the housing support 8 on which the protrusion 6 of the outer housing 2 is mounted. If the upward displacement of the outer housing 2 is positive, then the coefficient k4 in the fourth term is positive. If the thermal expansion of the housing support 8 increases, the outer housing 2 is lifted upward and displaced upward. The fourth term represents this displacement of the outer housing 2.

[0078] The thermal expansion I4 of the housing support 8 can be obtained based on the temperature Ts of the housing support 8 measured by the temperature sensor 32. I4 can be calculated, for example, according to the following formula (B).

[0079] I4 = (Ts - a) × b … (B)

[0080] In equation (B) above, a and b are coefficients.

[0081] In the fifth term of equation (A) above, I5 represents the vertical displacement of the rotor 12 (rotating part) of the steam turbine 1. If the upward displacement of the outer chamber 2 and the rotor 12 is positive, then the coefficient k5 of the fifth term is negative. During the operation of the steam turbine 1 (rotating machinery), due to thermal expansion in the vertical direction of the bearing platform 26 supporting the bearings supporting the rotor 12 or an increase in the rotational speed of the rotor 12, the rotor 12 may sometimes shift upward. The fifth term represents this displacement of the rotor 12. By adding the fifth term representing the displacement of the rotor 12, the index CCI, representing the relative displacement of the outer chamber 2 relative to the rotor 12, can be obtained.

[0082] The displacement I5 of the rotor 12 can be obtained based on the temperature Tb of the bearing housing 26 measured by the temperature sensor 34 and / or the rotational speed R of the rotor 12 measured by the speed sensor 36. I5 can be calculated, for example, according to the following formula (C).

[0083] I5 = d × Tb + e × R… (C)

[0084] In the above equation (C), d and e are coefficients.

[0085] In the sixth term of equation (A) above, I6 represents the output value of the steam turbine 1 (rotating machinery). If the upward displacement of the outer chamber 2 is positive, then the coefficient k6 in the sixth term is positive. When the thrust acts on the protrusion 6 of the outer chamber 2 according to the increase of the output of the rotating machinery, the protrusion 6 may bend, and the outer chamber 2 may deform by lifting upward, even if the axial position of the protrusion 6 is restricted. The sixth term represents this displacement of the outer chamber 2.

[0086] In the case of steam turbine 1, the output I6 can be calculated, for example, based on the temperature or flow rate of the gas supplied to the boiler used to generate steam supplied to steam turbine 1.

[0087] The constant term C in equation (A) above A It represents the value of the position adjustment amount based on the relative position of the adjustment component in the vertical direction relative to the outer chamber 2 of the rotor 12, for example, the height of the adjustment component (shim, etc.).

[0088] In addition, the above formula (A) also includes a linear combination of the sums of multiple nth terms as represented by the following formula (D).

[0089] CCI=(m1×I1+m2×I2+m3×I3)×M1+(m4×I4+m5×I5)×M2+C A …(D)

[0090] The coefficients (k1~k6, a~e, m1~m5, M1, M2, etc.) used to calculate the index CCI can be pre-determined based on the model or individual rotating machinery and its operating performance.

[0091] The index CCI, which represents the vertical displacement of the outer machine room 2, can be the sum of any two or more of the terms 1 to 6 included in the above formula (A).

[0092] For example, the index CCI can be represented by the sum of the first and second terms contained in the above formula (A) (the following formula (A')).

[0093] CCI=k1'×I1+k2'×I2...(A')

[0094] Furthermore, the coefficients k1 and k2 contained in the above equation (A) and the coefficients k1' and k2' contained in the above equation (A') can be different from each other.

[0095] Alternatively, the index CCI can be the sum of the first and second terms contained in the above formula (A) plus one or more of the third to sixth terms and the constant term.

[0096] As described above, the index CCI, representing the vertical displacement of the outer machine chamber 2, can be calculated using the temperatures at multiple locations within the outer machine chamber 2. The calculated index CCI can then be used as an indicator of the clearance between the rotating and stationary parts of rotating machinery.

[0097] Next, the control unit 56 compares the index CCI calculated in step S4 with a pre-set specified range (S6, S10).

[0098] The index CCI being less than the specified range means that the displacement upwards of the outer chamber 2 is less than the reference, and the clearance at the uppermost part of the rotor 12 is less than the reference. Therefore, when the index CCI is less than the specified range ("Yes" in step S6), the control unit 56 adjusts the shape or position of the outer chamber 2 to bring the index CCI within the specified range (S8). In step S8, the control unit 56 may, for example, appropriately control the heating unit 62 (temperature adjustment unit 60) to heat the chamber support 8, thereby adjusting the thermal expansion of the chamber support 8 and changing the position of the outer chamber 2 by raising it.

[0099] On the other hand, a CCI greater than the specified range means that the displacement upwards of the outer chamber 2 is greater than the reference, and the clearance at the lowest part of the rotor 12 is less than the reference. Therefore, when the CCI is greater than the specified range ("Yes" in step S10), the control unit 56 adjusts the shape or position of the outer chamber 2 to bring the CCI within the specified range (S12). In step S12, the control unit 56 may, for example, appropriately control the cooling unit 64 (temperature regulating unit 60) to supply cooling fluid to the protrusion 6, thereby deforming the outer chamber 2 in a downward manner.

[0100] Thus, if the index CCI calculated in step S4 is outside the specified range, the shape or position of the outer chamber 2 is adjusted so that the index CCI is within the specified range, thereby preventing the clearance between the uppermost or lowermost part of the rotating part of the steam turbine 1 (rotating machinery) from being too small. Therefore, contact between the rotating part and the stationary part of the steam turbine 1 (rotating machinery) can be effectively suppressed.

[0101] The contents described in the above embodiments can be understood as follows, for example.

[0102] (1) A monitoring and control device (50) for rotating machinery according to at least one embodiment of the present invention is used to monitor or control the clearance of rotating machinery (e.g., the steam turbine 1 described above) including a machine room (e.g., the outer machine room 2 described above) housing a rotating part and a stationary part, the monitoring and control device comprising: The acquisition unit (52) is configured to acquire multiple temperatures at multiple locations within the machine room; and The index calculation unit (54) is configured to calculate an index (such as the index CCI mentioned above) representing the vertical displacement of the machine room based on the plurality of temperatures.

[0103] Based on the structure described in (1) above, an index representing the vertical displacement of the machine room can be calculated based on multiple temperatures at multiple locations within the machine room. Therefore, based on this calculated index, the gap between the rotating and stationary parts can be monitored or controlled more appropriately. Furthermore, the temperature of the machine room can be obtained using a simple structure that incorporates a temperature sensor. Therefore, in the structure described in (1) above, an index representing the vertical displacement of the machine room can be calculated using a simple structure, and the gap can be monitored or controlled appropriately based on the calculated index.

[0104] (2) In some embodiments, in the structure described in (1) above, The index includes a linear combination of the plurality of temperatures.

[0105] Based on the structure described in (2) above, an index representing the vertical displacement of the machine room can be obtained through a relatively simple calculation using a linear combination of multiple temperatures at multiple locations within the machine room. Therefore, the clearance can be appropriately monitored or controlled using a simple structure.

[0106] (3) In some embodiments, in the structure described in (1) or (2) above, The machine room includes an upper half (e.g., the upper half 3 of the machine room described above) having an upper shell (3a) and a lower half (e.g., the lower half 4 of the machine room described above) having a lower shell (4a). The acquisition unit is configured to acquire the temperature of the upper housing and the temperature of the lower housing. The index calculation unit is configured to calculate the index including the first item, which is related to the temperature difference between the upper shell and the lower shell.

[0107] Based on the structure described in (3) above, an index including the first term related to the temperature difference between the upper and lower shells was calculated, thus enabling the acquisition of an index that takes into account the vertical movement of the machine compartment caused by the temperature difference between the upper and lower shells. Therefore, based on this index, the gap between the rotating part and the stationary part can be monitored or controlled more appropriately.

[0108] (4) In some embodiments, in any of the structures in (1) to (3) above, The machine room includes an upper half having an upper flange (3b) and an upper housing (3a) and a lower half having a lower flange (4b) and a lower housing (4a) fastened to the upper flange. The acquisition unit is configured to acquire the temperature of the housing portion including the upper housing or the lower housing, and the temperature of the flange portion including the upper flange or the lower flange. The index calculation unit is configured to calculate the index including the second item, which is related to the temperature difference between the housing portion and the flange portion.

[0109] Based on the structure described in (4) above, an index including the second item related to the temperature difference between the housing and the flange was calculated, thus obtaining an index that takes into account the vertical movement of the chamber caused by the temperature difference between the housing and the flange. Therefore, based on this index, the gap between the rotating part and the stationary part can be monitored or controlled more appropriately.

[0110] (5) In some embodiments, in any of the structures described in (1) to (4) above, The machine room includes an upper half having an upper flange and a lower half having a lower flange fastened to the upper flange. The acquisition unit is configured to acquire the temperature of the upper flange and the temperature of the lower flange. The index calculation unit is configured to calculate the index including the third item, which is related to the temperature difference between the upper flange and the lower flange.

[0111] Based on the structure described in (5) above, an index including a third term related to the temperature difference between the upper and lower flanges was calculated. Therefore, an index that takes into account the vertical movement of the machine chamber caused by the temperature difference between the upper and lower flanges can be obtained. Thus, based on this index, the gap between the rotating part and the stationary part can be monitored or controlled more appropriately.

[0112] (6) In some embodiments, in any of the structures described in (1) to (5) above, The machine room has a protrusion (6) that protrudes axially. The index calculation unit is configured to calculate the index including the fourth item, which is related to the thermal elongation of the machine room support (8) on which the protrusion is mounted.

[0113] Based on the structure described in (6) above, an index related to the thermal expansion of the housing support for the protrusion housing the machine chamber was calculated. Therefore, an index that takes into account the vertical movement of the machine chamber caused by the thermal expansion of the housing support can be obtained. Thus, based on this index, the gap between the rotating part and the stationary part can be monitored or controlled more appropriately.

[0114] (7) In some embodiments, in any of the structures in (1) to (6) above, The index calculation unit is configured to calculate the index including the fifth item, which is related to the vertical displacement of the rotating part of the rotating machinery.

[0115] Based on the structure described in (7) above, an index including a fifth term related to the vertical displacement of the rotating part was calculated, thus obtaining an index that takes into account the vertical displacement of the rotating part. Therefore, based on this index, the gap between the rotating part and the stationary part can be monitored or controlled more appropriately.

[0116] (8) In some embodiments, in any of the structures in (1) to (7) above, The index calculation unit is configured to calculate the index including the sixth item, which is related to the output of the rotating machinery.

[0117] Based on the structure described in (8) above, an index including the sixth item related to the output of the rotating machinery was calculated, thus obtaining an index that takes into account the vertical movement of the machine room caused by changes in the output of the rotating machinery. Therefore, based on this index, the gap between the rotating part and the stationary part can be monitored or controlled more appropriately.

[0118] (9) In some embodiments, in any of the structures in (1) to (8) above, The monitoring and control device for the rotating machinery includes: The control unit (56) is configured to adjust the shape or position of the machine room according to the index calculated by the index calculation unit.

[0119] According to the structure described in (9) above, the shape or position of the machine room can be changed by the control unit based on an index indicating the vertical displacement of the machine room. This effectively suppresses contact between the rotating part and the stationary part of the rotating machinery.

[0120] (10) In some embodiments, in the structure described in (9) above, The control unit is configured to adjust the shape or position of the machine room so that the indicator calculated by the indicator calculation unit is outside the specified range when the indicator is outside the specified range.

[0121] According to the structure described in (10) above, if the calculated index is outside the specified range, the shape or position of the machine room is adjusted so that the index is within the specified range. Therefore, it is possible to suppress the gap between the uppermost or lowermost part of the rotating part from being too small, and thus, it is possible to effectively suppress the contact between the rotating part and the stationary part of the rotating machinery.

[0122] (11) In some embodiments, in the structure described in (9) or (10) above, The control unit is configured to control a temperature regulating unit (60) for heating or cooling at least a portion of the machine room or the machine room support supporting the machine room, so that the index is within a specified range.

[0123] According to the structure described in (11) above, if the calculated index is outside the specified range, the temperature regulating unit is controlled and at least a part of the machine room or machine room support is heated or cooled in such a way that the index is within the specified range. Therefore, it is possible to suppress the gap between the uppermost or lowermost part of the rotating part from being too small, and thus, it is possible to effectively suppress the contact between the rotating part and the stationary part of the rotating machinery.

[0124] (12) The rotating machinery (100) according to at least one embodiment of the present invention comprises: Rotating machinery, including a machine room housing the rotating and stationary parts (e.g., the steam turbine 1 described above); and The monitoring and control device (50) described in any one of (1) to (11) above is used to monitor or control the clearance of the rotating machinery.

[0125] Based on the structure described in (12), an index representing the vertical displacement of the machine room can be calculated based on multiple temperatures at multiple locations within the machine room. Therefore, based on this calculated index, the gap between the rotating and stationary parts can be monitored or controlled more appropriately. Furthermore, the temperature of the machine room can be obtained using a simple structure that incorporates a temperature sensor. Thus, in the structure described in (12), an index representing the vertical displacement of the machine room can be calculated using a simple structure, and the gap can be monitored or controlled appropriately based on the calculated index.

[0126] (13) The monitoring and control method for rotating machinery according to at least one embodiment of the present invention is used to monitor or control the clearance of rotating machinery (e.g., the steam turbine 1 described above) including a machine room (e.g., the outer machine room 2 described above) housing a rotating part and a stationary part, the monitoring and control method comprising the following steps: Obtain multiple temperatures at multiple locations within the machine room (S2); and Based on the multiple temperatures, an index representing the vertical displacement of the machine room is calculated (S4).

[0127] According to the method described in (13) above, an index representing the vertical displacement of the machine room can be calculated based on multiple temperatures at multiple locations within the machine room. Therefore, based on the index calculated in this way, the gap between the rotating part and the stationary part can be monitored or controlled more appropriately. Furthermore, the temperature of the machine room can be obtained through a simple structure that installs a temperature sensor in the machine room. Therefore, in the method described in (13) above, an index representing the vertical displacement of the machine room can be calculated using a simple structure, and the gap can be monitored or controlled appropriately based on the calculated index.

[0128] (14) The monitoring and control program for rotating machinery according to at least one embodiment of the present invention is used to monitor or control the clearance of rotating machinery (e.g., the steam turbine 1 described above) including a machine room (e.g., the outer machine room 2 described above) housing a rotating part and a stationary part. The monitoring and control program is configured to cause a computer (e.g., the monitoring and control device 50 described above) to perform the following steps: Obtain multiple temperatures at multiple locations within the machine room; and Based on the multiple temperatures, an index representing the vertical displacement of the machine room is calculated.

[0129] According to the procedure described in (14) above, an index representing the vertical displacement of the machine room can be calculated based on multiple temperatures at multiple locations within the machine room. Therefore, based on the index calculated in this way, the gap between the rotating part and the stationary part can be monitored or controlled more appropriately. Furthermore, the temperature of the machine room can be obtained through a simple structure that installs a temperature sensor in the machine room. Therefore, in the procedure described in (14) above, an index representing the vertical displacement of the machine room can be calculated using a simple structure, and the gap can be monitored or controlled appropriately based on the calculated index.

[0130] The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and also includes modifications to the above embodiments or appropriate combinations of these embodiments.

[0131] In this specification, expressions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial" that indicate relative or absolute configuration not only indicate such configuration in a strict sense, but also indicate the state of relative displacement of angle or distance with tolerance or to obtain the same degree of functionality.

[0132] For example, expressions such as "same," "equal," and "homogeneous" that indicate that things are in an equal state not only indicate that they are the same in a strict sense, but also that there are differences in the degree to which they can achieve the same function.

[0133] Furthermore, in this specification, the description of shape, such as quadrilateral or cylindrical shape, not only refers to the shape of quadrilateral or cylindrical shape in a strict geometric sense, but also includes shapes such as concave or convex parts or chamfered parts within the range where the same effect can be obtained.

[0134] Furthermore, in this specification, expressions such as "possessing," "including," or "having" a constituent element are not exclusive expressions that exclude the existence of other constituent elements.

[0135] Symbol Explanation

[0136] 1-Steam turbine, 2-Outer chamber, 3-Upper part of chamber, 3a-Upper shell, 3b-Upper flange, 4-Lower part of chamber, 4a-Lower shell, 4b-Lower flange, 6-Protrusion, 8-Chamber support, 10-Base, 12-Rotor, 14-Rotating blade, 16-Inner chamber, 18-Blade ring, 19-Fixed blade, 20-Balance ring, 22-Sealing part, 26-Bearing base, 28-Steam inlet 29-Steam inlet, 30 (30A-1~30F-2)-Temperature sensor, 32, 32a, 32b-Temperature sensor, 34, 34a, 34b-Temperature sensor, 36-Speed ​​sensor, 50-Monitoring and control device, 52-Acquisition unit, 54-Indicator calculation unit, 56-Control unit, 60-Temperature regulation unit, 62-Heating unit, 64-Cooling unit, 100-Rotating machinery, O-Central shaft.

Claims

1. A monitoring and control device for rotating machinery, used for monitoring or controlling the clearance of rotating machinery including a machine room housing a rotating part and a stationary part, said monitoring and control device comprising: The acquisition unit is configured to acquire multiple temperatures at multiple locations within the machine room; and The index calculation unit is configured to calculate an index representing the vertical displacement of the machine room based on the plurality of temperatures. The machine room includes an upper half having an upper flange and an upper housing, and a lower half having a lower flange and a lower housing that are fastened to the upper flange. The index calculation unit is configured to calculate the index, which includes a linear combination of at least two of the following: the first item is related to the temperature difference between the upper housing and the lower housing; the second item is related to the temperature difference between the housing portion including the upper housing or the lower housing and the flange portion including the upper flange or the lower flange; the third item is related to the temperature difference between the upper flange and the lower flange; the fourth item is related to the thermal elongation of the housing support seat equipped with a protrusion extending axially along the housing; the fifth item is related to the vertical displacement of the rotating part of the rotating machinery; and the sixth item is related to the output of the rotating machinery.

2. The monitoring and control device for rotating machinery according to claim 1, wherein, The acquisition unit is configured to acquire the temperature of the upper housing and the temperature of the lower housing. The index calculation unit is configured to calculate the index including the first item, which is related to the temperature difference between the upper shell and the lower shell.

3. The monitoring and control device for rotating machinery according to claim 1, wherein, The acquisition unit is configured to acquire the temperature of the housing portion including the upper housing or the lower housing, and the temperature of the flange portion including the upper flange or the lower flange. The index calculation unit is configured to calculate the index including the second item, which is related to the temperature difference between the housing portion and the flange portion.

4. The monitoring and control device for rotating machinery according to claim 1, wherein, The acquisition unit is configured to acquire the temperature of the upper flange and the temperature of the lower flange. The index calculation unit is configured to calculate the index including the third item, which is related to the temperature difference between the upper flange and the lower flange.

5. The monitoring and control device for rotating machinery according to claim 1, wherein, The index calculation unit is configured to calculate the index including the fourth item, which is related to the thermal elongation of the machine room support seat on which the protrusion is mounted.

6. The monitoring and control device for rotating machinery according to claim 1, wherein, The index calculation unit is configured to calculate the index including the fifth item, which is related to the vertical displacement of the rotating part of the rotating machinery.

7. The monitoring and control device for rotating machinery according to claim 1, wherein, The index calculation unit is configured to calculate the index including the sixth item, which is related to the output of the rotating machinery.

8. The monitoring and control device for rotating machinery according to claim 1, comprising: The control unit is configured to adjust the shape or position of the machine room based on the index calculated by the index calculation unit.

9. The monitoring and control device for rotating machinery according to claim 8, wherein, The control unit is configured to adjust the shape or position of the machine room so that the indicator calculated by the indicator calculation unit is outside the specified range when the indicator is outside the specified range.

10. The monitoring and control device for rotating machinery according to claim 8, wherein, The control unit is configured to control a temperature regulating unit for heating or cooling at least a portion of the machine room or the machine room support supporting the machine room, so that the index is within a specified range.

11. A rotating mechanical device, comprising: Rotating machinery, including a machine room housing the rotating part and the stationary part; and The monitoring and control device according to claim 1 is used to monitor or control the clearance of the rotating machinery.

12. A monitoring and control method for rotating machinery, used to monitor or control the clearance of rotating machinery including a machine room housing a rotating part and a stationary part, the monitoring and control method comprising the following steps: Obtain multiple temperatures at multiple locations within the machine room; and Based on the multiple temperatures, calculate an index representing the vertical displacement of the machine room. The machine room includes an upper half having an upper flange and an upper housing, and a lower half having a lower flange and a lower housing that are fastened to the upper flange. In the step of calculating the index, the index is calculated as a linear combination of at least two of the following: the first item is related to the temperature difference between the upper housing and the lower housing; the second item is related to the temperature difference between the housing portion including the upper housing or the lower housing and the flange portion including the upper flange or the lower flange; the third item is related to the temperature difference between the upper flange and the lower flange; the fourth item is related to the thermal elongation of the housing support seat equipped with a protrusion extending axially along the housing; the fifth item is related to the vertical displacement of the rotating part of the rotating machinery; and the sixth item is related to the output of the rotating machinery.

13. A computer program product comprising a monitoring and control program for rotating machinery, the monitoring and control program being used to monitor or control the clearance of rotating machinery comprising a machine room housing a rotating part and a stationary part. The monitoring and control program is used to cause the computer to perform the following steps: Obtain multiple temperatures at multiple locations within the machine room; and Based on the multiple temperatures, calculate an index representing the vertical displacement of the machine room. The machine room includes an upper half having an upper flange and an upper housing, and a lower half having a lower flange and a lower housing that are fastened to the upper flange. In the step of calculating the index, the index is calculated as a linear combination of at least two of the following: the first item is related to the temperature difference between the upper housing and the lower housing; the second item is related to the temperature difference between the housing portion including the upper housing or the lower housing and the flange portion including the upper flange or the lower flange; the third item is related to the temperature difference between the upper flange and the lower flange; the fourth item is related to the thermal elongation of the housing support seat equipped with a protrusion extending axially along the housing; the fifth item is related to the vertical displacement of the rotating part of the rotating machinery; and the sixth item is related to the output of the rotating machinery.

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