WO2022202878A1 - 回転機械のラビング位置同定装置、及び、ラビング位置同定方法 - Google Patents
回転機械のラビング位置同定装置、及び、ラビング位置同定方法 Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/04—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator or to breaking-off of a part of the rotor, e.g. indicating such position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/04—Antivibration arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/162—Bearing supports
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/31—Application in turbines in steam turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/50—Bearings
- F05D2240/52—Axial thrust bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
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- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/333—Noise or sound levels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
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- F05D2270/30—Control parameters, e.g. input parameters
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- G01N2291/025—Change of phase or condition
- G01N2291/0258—Structural degradation, e.g. fatigue of composites, ageing of oils
Definitions
- TECHNICAL FIELD The present disclosure relates to a rubbing position identification device for a rotary machine and a rubbing position identification method.
- This application claims priority based on Japanese Patent Application No. 2021-054045 filed with the Japan Patent Office on March 26, 2021, the content of which is incorporated herein.
- rubbing contact
- static parts such as the outer casing and the inner casing are thermally deformed during operation. Rubbing may occur in Moreover, in recent years, there is a tendency for the clearance to be reduced in order to improve the performance of rotating machines, so the risk of occurrence of rubbing is increasing. The occurrence of such rubbing causes shaft vibration of the rotary machine and degradation of performance due to seal deterioration. Therefore, there is a need for a technology to detect the occurrence of rubbing at an early stage and feed it back to the operation.
- Patent Document 1 discloses a rubbing detection technique using an AE sensor capable of detecting an AE (Acoustic Emission) signal.
- an AE sensor is installed in each bearing that supports a rotating part on both sides in a rotating machine, and rubbing is detected based on the AE signal detected by each AE sensor.
- Patent Document 1 the presence or absence of rubbing is determined based on the AE signal detected by the AE sensor provided in each bearing that supports the rotating part on both sides, but the position where rubbing occurs is not specified. . Therefore, when rubbing is detected in Patent Document 1, countermeasures must be considered for the entire rotary machine in order to eliminate or mitigate the rubbing. On the other hand, if the position where rubbing occurs can be specified, the object can be narrowed down to a specific range of the rotary machine, and efficiency can be improved.
- At least one embodiment of the present disclosure has been made in view of the above circumstances, and includes a rubbing position identification device for a rotating machine capable of accurately identifying the rubbing generation position based on an AE signal detected by an AE sensor; It is an object of the present invention to provide a rubbing position identification method.
- a rubbing position identification device for a rotating machine includes: A rubbing position identification device for a rotating machine having a rotating part rotatably supported by a bearing arranged between a first stationary part and a second stationary part arranged along an axial direction, a pair of first AE sensors respectively attached to the first stationary portion and the second stationary portion; When rubbing occurs in the rotary machine, the position where the rubbing occurs is determined based on the AE signal detected by the pair of first AE sensors in the first unit including the first stationary portion or the second stationary portion. a rubbing occurrence position determination unit for determining which of the second units including the Prepare.
- a rubbing position identification method for a rotating machine includes: A rubbing position identification method for a rotating machine having a rotating part rotatably supported by a bearing arranged between a first stationary part and a second stationary part arranged along an axial direction, the method comprising: a step of detecting an AE signal with a pair of first AE sensors respectively attached to the first stationary portion and the second stationary portion; When rubbing occurs in the rotary machine, the position where the rubbing occurs is either the first unit including the first stationary portion or the second unit including the second stationary portion, based on the AE signal. a step of determining whether there is Prepare.
- a rubbing position identification device for a rotary machine and a rubbing position identification method that can accurately identify the rubbing occurrence position based on the AE signal detected by the AE sensor.
- FIG. 1 is a cross-sectional structural view of a rotating machine according to one embodiment
- FIG. 2 is a flowchart showing a rubbing position identification method performed by the rubbing position identification device of FIG. 1; It is a cross-sectional structural view of a rotating machine according to another embodiment.
- 5 is a flowchart showing a rubbing position identification method performed by the rubbing position identification device of FIG. 4; It is a cross-sectional structural view of a rotating machine according to another embodiment.
- 6 is a flowchart showing a rubbing position identification method performed by the rubbing position identification device of FIG. 5;
- FIG. 1 is a sectional structural diagram of a rotary machine 1 according to one embodiment.
- the rotary machine 1 comprises a stationary part 2 and a rotating part 4 rotatable relative to the stationary part 2 .
- the stationary part 2 is the casing of the rotating machine 1 and is stationary with respect to the outside.
- the rotating part 4 is rotatably supported by the stationary part 2 via a bearing 6 and can be driven by arbitrary power.
- a clearance D is provided between the stationary part 2 and the rotating part 4 (more precisely, the clearance D is the innermost peripheral part of the stationary blade of the stationary part 2 and the outermost part of the rotor blade of the rotating part 4). Although it is mainly formed between the outer peripheral portion (tip), it may extend between the stationary body to which the stationary blade is attached and the rotating body to which the moving blade is attached).
- a working fluid W is introduced into the clearance D from the outside, thereby driving the rotating part 4 .
- the working fluid W that has driven the rotating part 4 is discharged to the outside.
- at least one of the stationary part 2 and the rotating part 4 is deformed due to the influence of heat or the like, which may reduce the clearance D and cause rubbing. Such rubbing can be detected based on an AE signal detected by an AE sensor, which will be described later.
- the rotating machine 1 includes a plurality of units U arranged along the axial direction (extending direction) of the rotating portion 4 .
- the rotating machine 1 has a plurality of units U, which are a first unit Ua and a second unit Ub.
- the rotating machine 1 may have any number of units.
- the first unit Ua and the second unit Ub share the rotating part 4, and have independent stationary parts 2 (first stationary part 2a and second stationary part 2b). That is, the first unit Ua is composed of the first stationary part 2a and the rotating part 4, and the second unit Ub is composed of the second stationary part 2b and the rotating part 4. As shown in FIG.
- the rotating part 4 is a rotor that can be rotated by any power, and is powered by the working fluid W described above in this embodiment.
- the rotating portion 4 is configured by connecting a plurality of axially divided members (first member 4a and second member 4b) to each other at a joint portion 4c.
- the multiple members may be made of different materials.
- the AE signal from the position where rubbing occurs is likely to be blocked at the joint 4c. can be preferably identified.
- the rotary machine 1 may use steam as the working fluid W, and each unit U may be configured as a steam turbine.
- the flow path of the working fluid W may be independent in each unit U, or may be configured such that the units U are connected in series or in parallel.
- the first unit Ua is a high pressure turbine
- the second unit Ub is a high pressure turbine that can be driven by steam from the high pressure turbine. good too.
- Each unit U has an inlet portion 8 for introducing the working fluid W from the outside into the clearance D, and an outlet portion (not shown) for discharging the working fluid W that has finished work in the clearance D to the outside.
- the first unit Ua is provided with a first inlet 8a for introducing the working fluid W into the first clearance Da
- the second unit Ub is provided with the working fluid W through the second clearance Db.
- a second inlet 8b is provided for introduction. Noise caused by the working fluid W is generated in the vicinity of the inlet portion 8, and the AE signal from the position where rubbing is generated is likely to be blocked. By detecting the AE signal at 10, the rubbing occurrence position can be preferably identified.
- the rotating machine 1 also has at least one bearing 6 (radial bearing) for supporting the rotating part 4 .
- the bearings 6 include bearings 6a, 6b and 6c.
- the bearing 6a is provided at one end of the rotating portion 4, and the bearing 6b is provided at an intermediate position of the rotating portion 4 (specifically, the first stationary portion 2a constituting the first unit Ua and the second stationary portion 2a constituting the second unit Ub). and the stationary portion 2b), and the bearing 6c is provided on the other end side of the rotating portion 4 (on the side opposite to the bearing 6a).
- the rotating part 4 is rotatably supported by such a plurality of bearings 6 .
- the rubbing position identification device 100 identifies the position where rubbing occurs when it is determined that there is rubbing based on an AE (Acoustic Emission; high frequency output) signal detected by the AE sensor 10 in the rotating machine 1 having the above configuration. It is a device for identification.
- the rotating machine 1 generates AE waves when, for example, a seal or the like attached to the stationary part 2 that has undergone thermal deformation rubs against the rotating part 4 .
- an AE wave generated at a rubbing occurrence point propagates through the stationary part 2 and the rotating part 4 as an elastic wave, and is detected as an AE signal by each AE sensor 10 installed in the rotary machine 1 .
- AE waves generally have a frequency in the sound wave range of several tens of kHz to several MHz.
- the rubbing position identification device 100 includes a computing device 105 that performs computation for identifying the rubbing generation position when rubbing occurs based on the AE signal detected by the AE sensor 10 installed in the rotary machine 1.
- the arithmetic unit 105 is composed of, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and a computer-readable storage medium.
- a series of processes for realizing various functions is stored in a storage medium or the like in the form of a program, for example, and the CPU reads out this program to a RAM or the like, and executes information processing and arithmetic processing. As a result, various functions are realized.
- the program is pre-installed in a ROM or other storage medium, provided in a state stored in a computer-readable storage medium, or distributed via wired or wireless communication means. etc. may be applied.
- Computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, and the like.
- Such an arithmetic unit 105 acquires an AE signal detected by the AE sensor 10, and includes a rubbing determination unit 110 for determining the presence or absence of rubbing based on the AE signal; and a rubbing position identification unit 120 for identifying the position of occurrence of . It should be noted that the method of determining the presence or absence of rubbing in the rubbing determination unit 110 follows a known example, and details thereof are omitted.
- the rubbing position identification device 100 of this embodiment includes, as the AE sensor 10, a pair of first AE sensors 10A and 10B attached to the first stationary portion 2a and the second stationary portion 2b, respectively.
- the bearing 6b is arranged between the first stationary portion 2a and the second stationary portion 2b. are attached to the first ends 2a1 and 2b1 on the side of the bearing 6b.
- AE waves propagating from the rubbing occurrence position through the first stationary portion 2a and the second stationary portion 2b are preferably detected by the pair of AE sensors 10A and 10B.
- FIG. 2 is a flowchart showing the rubbing position identification method performed by the rubbing position identification device 100 of FIG.
- the rubbing determination unit 110 determines whether there is rubbing (step S100). The rubbing determination in step S100 is performed, for example, based on the AE signal detected by at least one of the pair of AE sensors 10A and 10B. If it is determined that there is no rubbing in any of the AE signals detected by the AE sensors 10A and 10B (step S100: NO), the rubbing determination unit 110 repeats step S100 to monitor rubbing. conduct. If it is determined that at least one of the AE signals detected by the AE sensors 10A and 10B has rubbing (step S100: YES), the process proceeds to the next step.
- the case where the rubbing determination is performed based on the AE signal detected by the AE sensor in step S100 is exemplified.
- the rubbing determination may be performed based on both the AE signal and the shaft vibration signal.
- the rubbing position identification unit 120 determines which of the pair of first AE sensors 10A and 10B detected the AE signal corresponding to the occurrence of rubbing. judge. Specifically, the rubbing position identification unit 120 determines whether or not an AE signal corresponding to the occurrence of rubbing is detected by one of the first AE sensors 10A (step S101). As a result, when the first AE sensor 10A detects an AE signal corresponding to the occurrence of rubbing (step S101: YES), the rubbing position identification unit 120 identifies the position where rubbing occurs as the first unit Ua (step S102). ).
- the rubbing position identification unit 120 identifies the position where rubbing occurs as the second unit Ub (step S103). ).
- the rubbing position identification unit 120 detects the first AE sensor that detected the AE signal.
- a unit can be identified as the location where rubbing occurs.
- Such identification of the rubbing occurrence position is particularly advantageous in the following cases, for example.
- the first AE sensors 10A and 10B by attaching the first AE sensors 10A and 10B to the first stationary portion 2a and the second stationary portion 2b, respectively, the first stationary portion 2a and the second stationary portion 2b are moved from the rubbing generation position.
- AE signals propagating through the second stationary portion 2b can be detected by the first AE sensors 10A and 10B. Therefore, regardless of the position of the joint 4c, the first AE sensors 10A and 10B can accurately detect the AE signal and identify the position where rubbing occurs based on the AE signal.
- the first unit Ua and the second unit Ub have first inlets for introducing the working fluid W between the bearings 6a and 6b and between the bearings 6b and 6c, respectively.
- a portion 8a and a second inlet portion 8b are provided. Since noise caused by the working fluid occurs at the first inlet portion 8a and the second inlet portion 8b, in the configuration in which AE sensors are arranged in the bearings 6a, 6b, and 6c, respectively, depending on the position where rubbing occurs, each AE sensor detects The received AE signal may contain noise, and sufficient identification accuracy may not be obtained.
- the first stationary portion 2a and the second stationary portion 2b are moved from the rubbing generation position.
- AE signals propagating through the second stationary portion 2b can be detected by the first AE sensors 10A and 10B. Therefore, it is less likely to be affected by noise caused by the working fluid W in the first inlet portion 8a and the second inlet portion 8b, and the first AE sensors 10A and 10B accurately detect the AE signal, and rubbing is performed based on the AE signal.
- the occurrence position can be identified with high accuracy.
- FIG. 3 is a cross-sectional structural diagram of a rotary machine 1 according to another embodiment.
- common reference numerals are assigned to configurations corresponding to the above-described embodiments, and duplicate descriptions will be omitted as appropriate.
- the rubbing position identification device 100 further includes second AE sensors 10C, 10D and 10E attached to the bearings 6a, 6b and 6c as the AE sensors 10, respectively.
- the second AE sensors 10C, 10D, and 10E are attached to the bearing housings of the bearings 6a, 6b, and 6c, so that the AE waves propagating from the position where rubbing occurs to the bearings 6a, 6b, and 6c via the rotating portion 4 are suitable. can be detected.
- the second sensors 10C, 10D, 10E may be attached to the lower divided body of the bearing housings. Since rubbing tends to occur on the lower side of the rotating machine 1, by attaching the second sensors 10C, 10D, and 10E to the divided body on the lower side of the bearing housing in this way, an AE wave corresponding to the occurrence of rubbing can be detected. It can be suitably detected.
- the above-described first AE sensors 10A and 10B are attached to the static portions 2a and 2b to detect AE waves propagating from the rubbing generation position through the static portions 2a and 2b.
- the first AE sensors 10A and 10B (for example, the AE waves propagated through the rotating part 4) can be detected.
- the rubbing position identification device 100 includes the second AE sensors 10C, 10D, and 10E in addition to the first AE sensors 10A and 10B, thereby more accurately determining the presence or absence of rubbing based on AE waves propagating on different routes. , and identification of the position where rubbing occurs.
- the rubbing position identification device 100 further includes third AE sensors 10F and 10G as the AE sensors 10.
- the third AE sensors 10F and 10G are attached to the first stationary portion 2a and the second stationary portion 2b, respectively, similarly to the first AE sensors 10A and 10B described above.
- the third AE sensors 10F and 10G are located on the opposite side of the first end portions 2a1 and 2b1 (bearing 6b side) of the first stationary portion 2a and the second stationary portion 2b to which the first AE sensors 10A and 10B are attached. It is attached to each of the two ends 2a2 and 2b2.
- FIG. 4 is a flowchart showing a rubbing position identification method performed by the rubbing position identification device 100 of FIG.
- the rubbing determination unit 110 determines whether there is rubbing (step S200).
- the rubbing determination in step S200 is, for example, whether or not an AE signal corresponding to the occurrence of rubbing has been detected by any of the first AE sensors 10A, 10B, the second AE sensors 10C, 10D, 10E, and the third AE sensors 10F, 10G. It is done by
- the rubbing position identification unit 120 determines which of the second AE sensors 10C, 10D, and 10E detected the AE signal corresponding to the occurrence of rubbing. judge. That is, in order to identify the position where rubbing occurs, first, it is determined at which of the second AE sensors 10C, 10D, and 10E attached to the bearings 6a, 6b, and 6c, the AE wave from the location where rubbing occurs. , identification of the position where rubbing occurs in the first stage is performed.
- the rubbing position identification unit 120 determines whether or not the second AE sensor 10C attached to the bearing 6a detects an AE signal corresponding to the occurrence of rubbing (step S201). As a result, when an AE signal corresponding to the occurrence of rubbing is detected by the second AE sensor 10C (step S201: YES), the rubbing position identification unit 120 causes the third sensor 10F attached to the first stationary part 2a to detect the occurrence of rubbing. is detected (step S202). As a result, when the third AE sensor 10F detects an AE signal corresponding to the occurrence of rubbing (step S202: YES), the rubbing position identification unit 120 determines that the rubbing occurrence position is the bearing 6a side of the first unit Ua.
- step S203 if the third AE sensor 10F does not detect an AE signal corresponding to the occurrence of rubbing (step S202: NO), the rubbing position identification section 120 identifies the position where rubbing occurs somewhere in the first unit Ua. (step S204).
- the rubbing position identification unit 120 also determines whether or not the second AE sensor 10D attached to the bearing 6b has detected an AE signal corresponding to the occurrence of rubbing (step S205). As a result, when an AE signal corresponding to the occurrence of rubbing is detected by the second AE sensor 10D (step S205: YES), the rubbing position identification unit 120 causes the first sensor 10A attached to the first stationary part 2a to detect the occurrence of rubbing. is detected (step S206). As a result, if the first AE sensor 10A detects an AE signal corresponding to the occurrence of rubbing (step S206: YES), the rubbing position identification unit 120 determines that the rubbing occurrence position is the bearing 6b side of the first unit Ua.
- step S207 On the other hand, if the first AE sensor 10A does not detect the AE signal corresponding to the occurrence of rubbing (step S206: NO), the rubbing position identification unit 120 causes the first sensor 10B attached to the second stationary part 2b to detect the occurrence of rubbing. is detected (step S208). As a result, if the first AE sensor 10B detects an AE signal corresponding to the occurrence of rubbing (step S208: YES), the rubbing position identification unit 120 determines that the rubbing occurrence position is the bearing 6b side of the second unit Ub. (step S209). On the other hand, if the first AE sensor 10B does not detect an AE signal corresponding to the occurrence of rubbing (step S208: NO), the rubbing position identification unit 120 determines that the rubbing occurrence position cannot be identified (step S210). .
- the rubbing position identification unit 120 also determines whether or not an AE signal corresponding to the occurrence of rubbing is detected by the second AE sensor 10E attached to the third bearing 6c (step S211). As a result, when the second AE sensor 10E detects an AE signal corresponding to the occurrence of rubbing (step S211: YES), the rubbing position identification unit 120 causes the third sensor 10G attached to the second stationary part 2b to detect the occurrence of rubbing. is detected (step S212). As a result, when the AE signal corresponding to the occurrence of rubbing is detected by the third AE sensor 10G (step S212: YES), the rubbing position identification section 120 determines the rubbing occurrence position to the third bearing 6c side of the second unit Ub.
- step S213 On the other hand, if the third AE sensor 10G does not detect an AE signal corresponding to the occurrence of rubbing (step S212: NO), the rubbing position identification section 120 identifies the position where rubbing occurs somewhere in the second unit Ub. (step S214). When the second AE sensor 10E does not detect the AE signal corresponding to the occurrence of rubbing (step S211: NO), the rubbing position identification unit 120 detects the AE signal determined to have rubbing in step S200. The rubbing generation position is identified based on the installation position of (step S215).
- the position where rubbing occurs in the rotating machine 1 is determined based on the AE signals detected by the second AE sensors 10C, 10D and 10E and the third AE sensors 10F and 10G. can be identified in more detail.
- Such identification of the rubbing occurrence position is particularly advantageous in the following cases, for example.
- the joint 4c of the rotating part 4 is located between the bearings 6b and 6c (similarly when there is a joint 4c between the bearings 6a and 6b), the joint 4c interrupts the rubbing waveform.
- the first AE sensors 10A and 10B are attached to the first stationary portion 2a and the second stationary portion 2b, respectively, and the third AE sensors 10F and 10G are attached to the first stationary portion 2a and 10G, respectively.
- the AE signals propagating from the rubbing generation position to the first stationary part 2a and the second stationary part 2b are detected by the first AE sensors 10A, 10B and the third AE sensors 10F, 10G. can. Therefore, regardless of the position of the joint 4c, the first AE sensors 10A, 10B and the third AE sensors 10F, 10G can accurately detect the AE signal and identify the rubbing generation position based on the AE signal.
- the first unit Ua and the second unit Ub have first inlets for introducing the working fluid W between the bearings 6a and 6b and between the bearings 6b and 6c, respectively.
- a portion 8a and a second inlet portion 8b are provided. Since noise caused by the working fluid occurs at the first inlet portion 8a and the second inlet portion 8b, only the second AE sensors 10C, 10D, and 10E are arranged in the bearings 6a, 6b, and 6c, respectively. In some cases, noise is included in the AE signal detected by each AE sensor, and sufficient identification accuracy may not be obtained. In contrast, in the embodiment shown in FIGS.
- the first AE sensors 10A and 10B are attached to the first stationary portion 2a and the second stationary portion 2b, respectively, and the third AE sensors 10F and 10G are attached to the first stationary portion 2a and 10G, respectively.
- the AE signals propagating from the rubbing generation position to the first stationary part 2a and the second stationary part 2b are detected by the first AE sensors 10A, 10B and the third AE sensors 10F, 10G. can. Therefore, the first AE sensors 10A and 10B and the third AE sensors 10F and 10G are less likely to be affected by noise caused by the working fluid W in the first inlet portion 8a and the second inlet portion 8b, and the AE signals are accurately detected and detected. Based on the AE signal, the rubbing occurrence position can be identified with high accuracy.
- FIG. 5 is a sectional structural diagram of a rotary machine 1 according to another embodiment.
- common reference numerals are assigned to configurations corresponding to the above-described embodiments, and duplicate descriptions will be omitted as appropriate.
- the bearing 6b arranged between the first stationary portion 2a and the second stationary portion 2b of the rotary machine 1 is the first bearing 6b-1 arranged along the axial direction of the rotating portion 4 and the It includes a second bearing 6b-2.
- the first bearing 6b-1 and the second bearing 6b-2 are radial bearings that rotatably support the rotating portion 4, and are housed in a common bearing box.
- a fourth AE sensor 10H and a fifth AE sensor 10I are attached to the bearing housing instead of the second AE sensor D in the embodiment shown in FIG.
- the fourth AE sensor 10H and the fifth AE sensor 10I are arranged at different positions in the bearing housing along the axial direction with an interval ⁇ L.
- FIG. 6 is a flow chart showing the rubbing position identification method performed by the rubbing position identification device 100 of FIG.
- the rubbing determination unit 110 determines whether there is rubbing (step S300).
- the rubbing determination in step S200 is, for example, whether or not an AE signal corresponding to the occurrence of rubbing has been detected by any of the first AE sensors 10A and 10B, the third AE sensors 10F and 10G, the fourth AE sensor 10H and the fifth AE sensor 10I. performed by
- the rubbing position identification unit 120 identifies the rubbing generation position based on the time difference or phase difference between the AE signals detected by the fourth AE sensor 10H and the fifth AE sensor 10I (step S301). Since the fourth AE sensor 10H and the fifth AE sensor 10I are arranged at an interval ⁇ L from each other as described above, there is not a little time difference or phase difference in detecting AE waves from rubbing. By evaluating such time difference or phase difference, it is possible to identify whether the rubbing occurrence position is in the first unit Ua or in the second unit Ub.
- the rubbing generation position is identified as being in the first unit Ua near the fourth AE sensor 10H.
- the fifth AE sensor 10I detects the AE wave earlier than the fourth AE sensor 10H, it is identified that the rubbing generation position is in the second unit Ub close to the fifth AE sensor 10I.
- the rubbing position identification unit 120 is further configured based on the AE signals detected by the first AE sensors 10A and 10B, the third AE sensors 10F and 10G, the fourth AE sensor 10H and the fifth AE sensor 10I in the same manner as in the above embodiment.
- the position where rubbing occurs may be identified, and the identification result may be compared with the identification result in step S301.
- This collation result can be used as appropriate by recording it in a predetermined recording device, for example.
- the identification result of the rubbing occurrence position based on the AE signal detected by each AE sensor 10 is obtained from the AE detected by the fourth AE sensor 10H and the fifth AE sensor 10I.
- the rubbing occurrence position can be identified with higher accuracy.
- Such identification of the rubbing occurrence position is particularly advantageous in the following cases, for example.
- As a configuration for specifying the rubbing occurrence position it is conceivable to dispose only the AE sensors 10C, 10H, 10I, and 10E on the bearings 6a, 6b-1, 6b-2, and 6c, respectively. , as shown in FIG. 5, if the joint 4c of the rotating part 4 is located between the bearings 6b and 6c (the same applies if the joint 4c is between the bearings 6a and 6b), the joint 4c may block the rubbing waveform.
- the second AE sensor 10C installed on the bearing 6a cannot detect the rubbing, and it may become difficult to identify the position where the rubbing occurs.
- the second AE sensor 10E installed on the bearing 6c cannot detect it, making it difficult to identify the position where rubbing occurs.
- the first AE sensors 10A and 10B are attached to the first stationary portion 2a and the second stationary portion 2b, respectively, and the third AE sensors 10F and 10G are attached to the first stationary portion 2a and 10G, respectively.
- the AE signals propagating from the rubbing generation position to the first stationary part 2a and the second stationary part 2b are detected by the first AE sensors 10A, 10B and the third AE sensors 10F, 10G. can. Therefore, regardless of the position of the joint 4c, the first AE sensors 10A, 10B and the third AE sensors 10F, 10G can accurately detect the AE signal and identify the rubbing generation position based on the AE signal.
- the first unit Ua and the second unit Ub have first inlets for introducing the working fluid W between the bearings 6a and 6b and between the bearings 6b and 6c, respectively.
- a portion 8a and a second inlet portion 8b are provided. Since noise caused by the working fluid occurs at the first inlet portion 8a and the second inlet portion 8b, only the AE sensors 10C, 10H, 10I, and 10E are arranged in the bearings 6a, 6b-1, 6b-2, and 6c, respectively. In this configuration, noise may be included in the AE signal detected by each AE sensor depending on the position where rubbing occurs, and sufficient identification accuracy may not be obtained.
- the first AE sensors 10A and 10B are attached to the first stationary portion 2a and the second stationary portion 2b, respectively, and the third AE sensors 10F and 10G are attached to the first stationary portion 2a and 10G, respectively.
- the AE signals propagating from the rubbing generation position to the first stationary part 2a and the second stationary part 2b are detected by the first AE sensors 10A, 10B and the third AE sensors 10F, 10G. can. Therefore, the first AE sensors 10A and 10B and the third AE sensors 10F and 10G are less likely to be affected by noise caused by the working fluid W in the first inlet portion 8a and the second inlet portion 8b, and the AE signals are accurately detected and detected. It is possible to accurately identify the position where rubbing occurs based on the AE signal.
- the position where rubbing occurs in the rotary machine 1 is identified.
- the identification result of such a rubbing occurrence position can be used for various countermeasures for eliminating or reducing rubbing occurring in the rotating machine 1 .
- countermeasures may be taken not for the entire rotary machine 1 but for that unit.
- the burden required for the countermeasure can be greatly reduced.
- a rotary machine rubbing position identification device includes: A bearing (for example, A rubbing position identification device (for example, the above embodiment) of a rotating machine (for example, the rotating machine 1 of the above embodiment) having a rotating part (for example, the rotating part 4 of the above embodiment) rotatably supported by the bearing 6b) of the above embodiment
- the position where the rubbing occurs is determined based on the AE signals detected by the pair of first AE sensors to the first unit (for example, the first unit in the above embodiment) including the first stationary portion.
- 1 unit Ua) or a second unit including the second stationary unit for example, the second unit Ub in the above embodiment.
- the rotary machine has a rotating portion rotatably supported by bearings arranged between the first stationary portion and the second stationary portion arranged along the axial direction.
- a pair of first AE sensors are attached to the first stationary part and the second stationary part, respectively.
- the rubbing position identification unit identifies the unit to which the first AE sensor that detected the AE signal is attached. It is identified as the position where the rubbing occurs.
- the rubbing position identification unit determines which of the pair of first AE sensors detected the AE signal corresponding to the rubbing. Then, based on the determination result, it is identified that the rubbing occurrence position is the unit having the stationary portion to which the first AE sensor that detects the AE signal corresponding to the rubbing is attached.
- a second AE sensor for example, the second AE sensors 10C, 10D, and 10E in the above embodiment
- a rubbing determination unit for example, the rubbing determination unit 110 of the above embodiment
- the presence or absence of rubbing in the rotary machine is determined based on the AE signal detected by the second AE sensor attached to the bearing. Then, when it is determined that there is rubbing in the rotary machine, as described above, it is possible to identify the position where rubbing occurs based on the AE signals detected by the pair of first AE sensors.
- the pair of first AE sensors are attached to the first ends (for example, the first ends 2a1 and 2b1 in the above embodiment) on the bearing side of the first stationary portion and the second stationary portion.
- the pair of first AE sensors are attached to the bearing-side end of the stationary portion, so that the AE signal generated by rubbing and propagating through the stationary portion can be detected favorably.
- the rubbing position identification section identifies the position where the rubbing occurs based on the AE signals detected by the pair of first AE sensors and the pair of third AE sensors.
- the third AE sensor is attached to the second end opposite to the first end to which the first AE sensor is attached.
- the bearing includes a first bearing (for example, the first bearing 6b1 in the above embodiment) and a second bearing (for example, the second bearing 6b2 in the above embodiment) arranged adjacent to each other along the axial direction, a fourth AE sensor (for example, the fourth AE sensor 10H in the above embodiment) attached to the first bearing; a fifth AE sensor (for example, the fifth AE sensor 10I in the above embodiment) attached to the second bearing; further comprising
- the rubbing position identification unit identifies the position where the rubbing occurs based on the time difference or phase difference between the AE signals detected by the fourth AE sensor and the fifth AE sensor.
- the bearings arranged between the first unit and the second unit include the first bearing and the second bearing.
- a fourth AE sensor and a fifth AE sensor are attached to the first bearing and the second bearing, respectively.
- the rubbing position identification unit can identify the rubbing occurrence position based on the AE signals detected by the pair of first AE sensors as described above. can also be identified, and good identification accuracy can be obtained by collating the two.
- the rotating portion includes a plurality of members (for example, the first member 4a and the second member 4b in the above embodiment) that are connected to each other along the axial direction via a joint portion (for example, the joint portion 4c in the above embodiment). .
- the AE signal from the position where rubbing occurs is likely to be blocked at the joint.
- the first unit and the second unit each include an inlet portion (for example, the working fluid W in the above embodiment) for introducing a working fluid (for example, the working fluid W in the above embodiment) between the first stationary portion and the second stationary portion and the rotating portion.
- each has an inlet portion 8) of the above embodiment.
- the rubbing generation position can be detected in the first position. It can be preferably identified whether it is in the 1st unit or in the 2nd unit.
- a rubbing position identification method for a rotating machine includes: A bearing (for example, A method for identifying a rubbing position of a rotary machine (for example, the rotary machine 1 of the above embodiment) having a rotary part (for example, the rotary part 4 of the above embodiment) rotatably supported by the above embodiment, a step of detecting an AE signal with a pair of first AE sensors (for example, the first AE sensors 10A and 10B in the above embodiment) respectively attached to the first stationary portion and the second stationary portion; When rubbing occurs in the rotary machine, based on the AE signal, the position where the rubbing occurs is the first unit (for example, the first unit Ua in the above embodiment) including the first stationary portion, or the first unit Ua in the above embodiment. a step of determining which of the second units (for example, the second unit Ub in the above embodiment) including two stationary parts; Prepare.
- a bearing for example, A method for identifying a rubbing position of a rotary machine (for example, the rotary machine 1
- the rotating machine has a rotating portion rotatably supported by a bearing arranged between the first stationary portion and the second stationary portion arranged along the axial direction.
- a pair of first AE sensors are attached to the first stationary part and the second stationary part, respectively.
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Abstract
Description
本願は、2021年3月26日に日本国特許庁に出願された特願2021-054045号に基づき優先権を主張し、その内容をここに援用する。
軸方向に沿って配置される第1静止部及び第2静止部の間に配置される軸受によって回転可能に支持される回転部を有する回転機械のラビング位置同定装置であって、
前記第1静止部及び前記第2静止部にそれぞれ取り付けられた一対の第1AEセンサと、
前記回転機械でラビングが発生した場合に、前記一対の第1AEセンサで検出されたAE信号に基づいて、前記ラビングの発生位置が前記第1静止部を含む第1ユニット、又は、前記第2静止部を含む第2ユニットのいずれであるかを判定するためのラビング発生位置判定部と、
を備える。
軸方向に沿って配置される第1静止部及び第2静止部の間に配置される軸受によって回転可能に支持される回転部を有する回転機械のラビング位置同定方法であって、
前記第1静止部及び前記第2静止部にそれぞれ取り付けられた一対の第1AEセンサでAE信号を検出する工程と、
前記回転機械でラビングが発生した場合に、前記AE信号に基づいて、前記ラビングの発生位置が前記第1静止部を含む第1ユニット、又は、前記第2静止部を含む第2ユニットのいずれであるかを判定する工程と、
を備える。
それに対して図1及び図2に示す実施形態では、第1AEセンサ10A、10Bをそれぞれ第1静止部2a及び第2静止部2bにそれぞれ取り付けることで、ラビングの発生位置から第1静止部2a及び第2静止部2bを伝播するAE信号を第1AEセンサ10A、10Bで検出できる。そのため、接合部4cの位置に関わらず、第1AEセンサ10A、10Bで的確にAE信号を検出し、当該AE信号に基づいてラビングの発生位置を同定することができる。
それに対して図1及び図2に示す実施形態では、第1AEセンサ10A、10Bをそれぞれ第1静止部2a及び第2静止部2bにそれぞれ取り付けることで、ラビングの発生位置から第1静止部2a及び第2静止部2bを伝播するAE信号を第1AEセンサ10A、10Bで検出できる。そのため、第1入口部8a及び第2入口部8bにおける作動流体Wに起因するノイズの影響を受けにくく、第1AEセンサ10A、10Bで的確にAE信号を検出し、当該AE信号に基づいてラビングの発生位置を精度よく同定することができる。
尚、第2AEセンサ10Eでラビング発生に対応するAE信号が検出されなかった場合(ステップS211:NO)、ラビング位置同定部120は、ステップS200でラビングが有ると判定したAE信号を検出したAEセンサの設置位置に基づいてラビングの発生位置を同定する(ステップS215)。
それに対して図3及び図4に示す実施形態では、第1AEセンサ10A、10Bをそれぞれ第1静止部2a及び第2静止部2bにそれぞれ取り付けるとともに、第3AEセンサ10F、10Gをそれぞれ第1静止部2a及び第2静止部2bにそれぞれ取り付けることで、ラビングの発生位置から第1静止部2a及び第2静止部2bを伝播するAE信号を第1AEセンサ10A、10B及び第3AEセンサ10F、10Gで検出できる。そのため、接合部4cの位置に関わらず、第1AEセンサ10A、10B及び第3AEセンサ10F、10Gで的確にAE信号を検出し、当該AE信号に基づいてラビングの発生位置を同定することができる。
それに対して図3及び図4に示す実施形態では、第1AEセンサ10A、10Bをそれぞれ第1静止部2a及び第2静止部2bにそれぞれ取り付けるとともに、第3AEセンサ10F、10Gをそれぞれ第1静止部2a及び第2静止部2bにそれぞれ取り付けることで、ラビングの発生位置から第1静止部2a及び第2静止部2bを伝播するAE信号を第1AEセンサ10A、10B及び第3AEセンサ10F、10Gで検出できる。そのため、第1入口部8a及び第2入口部8bにおける作動流体Wに起因するノイズの影響を受けにくく、第1AEセンサ10A、10B及び第3AEセンサ10F、10Gで的確にAE信号を検出し、当該AE信号に基づいてラビングの発生位置を精度よく同定することができる。
それに対して図5及び図6に示す実施形態では、第1AEセンサ10A、10Bをそれぞれ第1静止部2a及び第2静止部2bにそれぞれ取り付けるとともに、第3AEセンサ10F、10Gをそれぞれ第1静止部2a及び第2静止部2bにそれぞれ取り付けることで、ラビングの発生位置から第1静止部2a及び第2静止部2bを伝播するAE信号を第1AEセンサ10A、10B及び第3AEセンサ10F、10Gで検出できる。そのため、接合部4cの位置に関わらず、第1AEセンサ10A、10B及び第3AEセンサ10F、10Gで的確にAE信号を検出し、当該AE信号に基づいてラビングの発生位置を同定することができる。
それに対して図5及び図6に示す実施形態では、第1AEセンサ10A、10Bをそれぞれ第1静止部2a及び第2静止部2bにそれぞれ取り付けるとともに、第3AEセンサ10F、10Gをそれぞれ第1静止部2a及び第2静止部2bにそれぞれ取り付けることで、ラビングの発生位置から第1静止部2a及び第2静止部2bを伝播するAE信号を第1AEセンサ10A、10B及び第3AEセンサ10F、10Gで検出できる。そのため、第1入口部8a及び第2入口部8bにおける作動流体Wに起因するノイズの影響を受けにくく、第1AEセンサ10A、10B及び第3AEセンサ10F、10Gで的確にAE信号を検出し、当該AE信号に基づいてラビングの発生位置を精度よく同定することができる。
軸方向に沿って配置される第1静止部(例えば上記実施形態の第1静止部2a)及び第2静止部(例えば上記実施形態の第2静止部2b)の間に配置される軸受(例えば上記実施形態の軸受6b)によって回転可能に支持される回転部(例えば上記実施形態の回転部4)を有する回転機械(例えば上記実施形態の回転機械1)のラビング位置同定装置(例えば上記実施形態のラビング位置同定装置100)であって、
前記第1静止部及び前記第2静止部にそれぞれ取り付けられた一対の第1AEセンサ(例えば上記実施形態の第1AEセンサ10A、10B)と、
前記回転機械でラビングが発生した場合に、前記一対の第1AEセンサで検出されたAE信号に基づいて、前記ラビングの発生位置が前記第1静止部を含む第1ユニット(例えば上記実施形態の第1ユニットUa)、又は、前記第2静止部を含む第2ユニット(例えば上記実施形態の第2ユニットUb)のいずれであるかを判定するためのラビング位置同定部(例えば上記実施形態のラビング位置同定部120)と、
を備える。
前記ラビング位置同定部は、前記一対の第1AEセンサのいずれか一方で前記ラビングに対応する前記AE信号が検出された場合に、当該AE信号が検出された前記第1AEセンサが取り付けられたユニットを前記ラビングの発生位置として同定する。
前記軸受に取り付けられた第2AEセンサ(例えば上記実施形態の第2AEセンサ10C、10D、10E)と、
前記第2AEセンサで検出されたAE信号に基づいて、前記ラビングの有無を判定するためのラビング判定部(例えば上記実施形態のラビング判定部110)と、
を更に備える。
前記一対の第1AEセンサは、前記第1静止部及び前記第2静止部のうち前記軸受側の第1端部(例えば上記実施形態の第1端部2a1、2b1)に取り付けられる。
前記第1静止部及び前記第2静止部のうち前記第1端部とは反対側の第2端部(例えば上記実施形態の第2端部2a2、2b2)にそれぞれ取り付けられる一対の第3AEセンサ(例えば上記実施形態の第3AEセンサ10F、10G)を更に備え、
前記ラビング位置同定部は、前記一対の第1AEセンサ及び前記一対の第3AEセンサで検出されたAE信号に基づいて、前記ラビングの発生位置を同定する。
前記軸受は、前記軸方向に沿って互いに隣接するように配置された第1軸受(例えば上記実施形態の第1軸受6b1)及び第2軸受(例えば上記実施形態の第2軸受6b2)を含み、
前記第1軸受に取り付けられた第4AEセンサ(例えば上記実施形態の第4AEセンサ10H)と、
前記第2軸受に取り付けられた第5AEセンサ(例えば上記実施形態の第5AEセンサ10I)と、
を更に備え、
前記ラビング位置同定部は、前記第4AEセンサ及び前記第5AEセンサで検出されたAE信号の時間差又は位相差に基づいて、前記ラビングの発生位置を同定する。
前記回転部は、接合部(例えば上記実施形態の接合部4c)を介して軸方向に沿って互いに連結された複数の部材(例えば上記実施形態の第1部材4a及び第2部材4b)を含む。
前記第1ユニット及び前記第2ユニットは、前記第1静止部及び前記第2静止部と前記回転部との間に作動流体(例えば上記実施形態の作動流体W)を導入するための入口部(例えば上記実施形態の入口部8)をそれぞれ有する。
軸方向に沿って配置される第1静止部(例えば上記実施形態の第1静止部2a)及び第2静止部(例えば上記実施形態の第2静止部2b)の間に配置される軸受(例えば上記実施形態の)によって回転可能に支持される回転部(例えば上記実施形態の回転部4)を有する回転機械(例えば上記実施形態の回転機械1)のラビング位置同定方法であって、
前記第1静止部及び前記第2静止部にそれぞれ取り付けられた一対の第1AEセンサ(例えば上記実施形態の第1AEセンサ10A、10B)でAE信号を検出する工程と、
前記回転機械でラビングが発生した場合に、前記AE信号に基づいて、前記ラビングの発生位置が前記第1静止部を含む第1ユニット(例えば上記実施形態の第1ユニットUa)、又は、前記第2静止部を含む第2ユニット(例えば上記実施形態の第2ユニットUb)のいずれであるかを判定する工程と、
を備える。
2 静止部
2a 第1静止部
2b 第2静止部
2a1、2b1 第1端部
2a2、2b2 第2端部
4 回転部
4a 第1部材
4b 第2部材
4c 接合部
6(6a、6b、6c) 軸受
6b1 第1軸受
6b2 第2軸受
8 入口部
8a 第1入口部
8b 第2入口部
10 AEセンサ
10A、10B 第1センサ
10C、10D、10E 第2センサ
10F、10G 第3センサ
10H 第4センサ
10I 第5センサ
100 ラビング位置同定装置
105 演算装置
110 ラビング判定部
120 ラビング位置同定部
D クリアランス
Da 第1クリアランス
Db 第2クリアランス
U ユニット
Ua 第1ユニット
Ub 第2ユニット
W 作動流体
Claims (9)
- 軸方向に沿って配置される第1静止部及び第2静止部の間に配置される軸受によって回転可能に支持される回転部を有する回転機械のラビング位置同定装置であって、
前記第1静止部及び前記第2静止部にそれぞれ取り付けられた一対の第1AEセンサと、
前記回転機械でラビングが発生した場合に、前記一対の第1AEセンサで検出されたAE信号に基づいて、前記ラビングの発生位置が前記第1静止部を含む第1ユニット、又は、前記第2静止部を含む第2ユニットのいずれであるかを判定するためのラビング位置同定部と、
を備える、回転機械のラビング位置同定装置。 - 前記ラビング位置同定部は、前記一対の第1AEセンサのいずれか一方で前記ラビングに対応する前記AE信号が検出された場合に、当該AE信号が検出された前記第1AEセンサが取り付けられたユニットを前記ラビングの発生位置として同定する、請求項1に記載の回転機械のラビング位置同定装置。
- 前記軸受に取り付けられた第2AEセンサと、
前記第2AEセンサで検出されたAE信号に基づいて、前記ラビングの有無を判定するためのラビング判定部と、
を更に備える、請求項1又は2に記載の回転機械のラビング位置同定装置。 - 前記一対の第1AEセンサは、前記第1静止部及び前記第2静止部のうち前記軸受側の第1端部に取り付けられる、請求項1から3のいずれか一項に記載の回転機械のラビング位置同定装置。
- 前記第1静止部及び前記第2静止部のうち前記第1端部とは反対側の第2端部にそれぞれ取り付けられる一対の第3AEセンサを更に備え、
前記ラビング位置同定部は、前記一対の第1AEセンサ及び前記一対の第3AEセンサで検出されたAE信号に基づいて、前記ラビングの発生位置を同定する、請求項1から4のいずれか一項に記載の回転機械のラビング位置同定装置。 - 前記軸受は、前記軸方向に沿って互いに隣接するように配置された第1軸受及び第2軸受を含み、
前記第1軸受に取り付けられた第4AEセンサと、
前記第2軸受に取り付けられた第5AEセンサと、
を更に備え、
前記ラビング位置同定部は、前記第4AEセンサ及び前記第5AEセンサで検出されたAE信号の時間差又は位相差に基づいて、前記ラビングの発生位置を同定する、請求項1から5のいずれか一項に記載の回転機械のラビング位置同定装置。 - 前記回転部は、接合部を介して軸方向に沿って互いに連結された複数の部材を含む、請求項1から6のいずれか一項に記載の回転機械のラビング位置同定装置。
- 前記第1ユニット及び前記第2ユニットは、前記第1静止部及び前記第2静止部と前記回転部との間に作動流体を導入するための入口部をそれぞれ有する、請求項1から7のいずれか一項に記載の回転機械のラビング位置同定装置。
- 軸方向に沿って配置される第1静止部及び第2静止部の間に配置される軸受によって回転可能に支持される回転部を有する回転機械のラビング位置同定方法であって、
前記第1静止部及び前記第2静止部にそれぞれ取り付けられた一対の第1AEセンサでAE信号を検出する工程と、
前記回転機械でラビングが発生した場合に、前記AE信号に基づいて、前記ラビングの発生位置が前記第1静止部を含む第1ユニット、又は、前記第2静止部を含む第2ユニットのいずれであるかを判定する工程と、
を備える、回転機械のラビング位置同定方法。
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KR1020237031295A KR20230145589A (ko) | 2021-03-26 | 2022-03-23 | 회전 기계의 러빙 위치 확인 장치 및 러빙 위치 확인 방법 |
US18/281,879 US20240167395A1 (en) | 2021-03-26 | 2022-03-23 | Rubbing position identification device and rubbing position identification method for rotating machine |
CN202280014619.0A CN116848404A (zh) | 2021-03-26 | 2022-03-23 | 旋转机械的摩擦位置确定装置及摩擦位置确定方法 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS54149696A (en) * | 1978-05-16 | 1979-11-24 | Hitachi Ltd | Rubbing detection between rotary body and stationary body |
JPS6121964U (ja) * | 1984-07-12 | 1986-02-08 | 株式会社 富士電機総合研究所 | ラビング検出装置 |
JP2003149043A (ja) * | 2001-11-16 | 2003-05-21 | Toshiba Corp | 回転機械の振動診断方法及び装置 |
US20160160849A1 (en) * | 2014-12-05 | 2016-06-09 | Energy Recovery, Inc. | Systems and Method for Pump Protection with a Hydraulic Energy Transfer System |
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JP3121365B2 (ja) | 1991-03-04 | 2000-12-25 | 株式会社日立製作所 | 回転機のラビング診断方法とその装置 |
JP3121365U (ja) | 2006-02-20 | 2006-05-18 | 亞旭電腦股▲分▼有限公司 | 境界走査試験機能付き周辺装置連接装置 |
JP7480542B2 (ja) | 2019-09-30 | 2024-05-10 | 大日本印刷株式会社 | 化粧シート、及び、化粧材 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54149696A (en) * | 1978-05-16 | 1979-11-24 | Hitachi Ltd | Rubbing detection between rotary body and stationary body |
JPS6121964U (ja) * | 1984-07-12 | 1986-02-08 | 株式会社 富士電機総合研究所 | ラビング検出装置 |
JP2003149043A (ja) * | 2001-11-16 | 2003-05-21 | Toshiba Corp | 回転機械の振動診断方法及び装置 |
US20160160849A1 (en) * | 2014-12-05 | 2016-06-09 | Energy Recovery, Inc. | Systems and Method for Pump Protection with a Hydraulic Energy Transfer System |
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