JPH11230733A - Deflection measurement device of rotating body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the reliability of a deflection amount, to reduce the labor of an operator and to reduce work time, by automatically measuring the deflection of a rotating body. SOLUTION: This deflection measurement device of a rotating body is provided with a driving means 7 for rotationally operating the rotating body 1 provided with a rotary axis 1a, a distance measurement means 8 for measuring a rotating body surface distance which is a distance from the surface of the rotating body 1 not vertical to the rotary axis 1a to itself, a timing control means 9 for controlling a timing for measuring the rotating body surface distance at the two or more prescribed number of rotating body surface positions by the distance measurement means 8 at the time of the rotating operation of the rotating body 1 by the driving means 7, and an arithmetic means 10 for obtaining the deflection amount of the rotating body 1 based on the rotating body surface distance at the prescribed number of the rotating body surface positions measured by the distance measurement means 8 corresponding to the timing control of the timing control means 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically measuring the swinging state of a rotating body.

[0002]

2. Description of the Related Art A rotating body performs a rotating motion about a rotating shaft, and examples thereof include a turbine rotor provided in a generator. Hereinafter, a case where the rotating body is a turbine rotor will be described as an example.

[0003] If the turbine rotor is deflected or misaligned, the turbine rotor swings during rotation, causing vibration. Various operations are performed when inspecting or maintaining the turbine rotor. Generally, the run-out of the turbine rotor is also measured.

FIG. 9 is a side view showing the concept of a conventional method for measuring runout of a turbine rotor. FIG. 10 shows a cross-sectional view of the turbine rotor perpendicular to the rotation axis. 9 and 10 show an example of a turbine rotor having a substantially circular cross section perpendicular to the rotation axis.

[0005] The vicinity of both ends of the rotating shaft 1 a of the turbine rotor 1 is rotatably supported at a fulcrum 2, and one end of the rotating shaft 1 a of the turbine rotor 1 is connected to a surface plate 3. The fixed base 4 is installed below the turbine rotor 1.

The dial gauge 5 is a device for measuring distances D _{1 to} D ₄ between the surface of the turbine rotor 1 which is not perpendicular to the rotation axis 1 a and the fixed base 4. This distance D ₁
To D ₄ is generally perpendicular to the rotary shaft 1a rotating shaft 1
It is measured in the direction toward a, that is, in the radial direction.

Here, when measuring the amount of runout of the turbine rotor 1, a predetermined number of two or more on the circumference of the turbine rotor 1 perpendicular to the rotating shaft 1a, that is, a plurality of measurement positions P
Although in ₁ to P ₄ it is necessary to measure the distance with a dial gauge 5, the plurality of measurement positions P ₁ to P ₄ are set in advance.

When measuring the run-out amount of the turbine rotor 1, first, the workers 6a to 6d rotate the turbine rotor 1. Next, a result of this rotation, when the measuring position P ₁ to P ₄ of the turbine rotor 1 surface came down, the worker 6e is visually measured the pointer of the dial gauge 5.

[0009] The worker 6f operates the measured distances D ₁ to D ₁ .
To record the D _4. Then, the run-out amount of the turbine rotor 1 is obtained based on the recorded distances D _{1 to} D ₄ .

In general, the measurement of the run-out amount of the turbine rotor 1 as described above is performed by measuring the other surface position of the turbine rotor 1, that is, the turbine rotor 1 perpendicular to the rotating shaft 1a.
It is also executed on other laps.

In the above description, the case where the measurement positions on the circumference are four points, that is, the predetermined number is four is taken as an example. However, the present invention is not limited to this, and eight points are used.
Various changes may be made as long as the number is 2 or more, such as 16 points.
Generally, when measuring the amount of shake of a rotating body, several tens of points are measured on the circumference.

Further, FIGS. 9 and 10 show an example in which the cross section perpendicular to the rotation axis of the turbine rotor is substantially circular. However, the present invention is not limited to this. But the same method applies.

[0013]

As described above, in the conventional method for measuring the runout of a rotating body, particularly the runout of a turbine rotor, an operator observes and records a dial gauge at each measurement position. I want the amount of shake.

In this conventional method, for example, when the rotating body is a heavy object having tens of tons, a plurality of workers are required to rotate the rotating body. In addition, when measuring the amount of run-out on multiple circumferences perpendicular to the rotation axis of the rotating body, it is necessary to re-install the fixed base and repeat the same work, and the operator observes the dial gauge scale. And the time required for measurement increases accordingly.

Furthermore, even when the number of measurement positions on each circumference is increased, the number of times the operator observes the dial gauge scale increases, and the time required for measurement increases. Furthermore, in the conventional method for measuring the run-out of a rotating body, an operator measures the distance by visually checking the scale of the dial gauge, so that there is a possibility of a measurement error and a measurement error increases.

Therefore, the accuracy and reliability of the required amount of runout of the rotating body is reduced. Further, since the operator also determines whether or not the measurement position has been lowered by rotation, it is difficult to measure the distance at an accurate measurement position, and the measurement position may be shifted.

Here, the surface of the rotating body has irregularities, and the proportion of the irregularities increases as the rotating body becomes older. Therefore, when the measurement position is shifted, the influence of the unevenness is greatly affected, and the accuracy and reliability of the required amount of shake of the rotating body is reduced.

Furthermore, in the conventional method for measuring the run-out of a rotating body, the operator also records the distance measured by the dial gauge and the run-out amount of the rotary body obtained from the distance. And transcription errors.

As described above, in the conventional method of measuring the vibration of the rotating body, since the measurement is mainly performed by a human system, the burden on the operator is large, the work time is long, and the required amount of the vibration of the rotating body is required. There is a problem that accuracy and reliability are reduced.

The present invention has been made in view of the above circumstances, and enables automatic measurement of the vibration of a rotating body, thereby reducing the labor and the working time of an operator in measuring the vibration of the rotating body. SUMMARY OF THE INVENTION It is an object of the present invention to provide a rotating body shake measuring device capable of improving the accuracy and reliability of the amount of shake of the rotating body.

[0021]

In order to achieve the above object, the present invention takes the following measures. The present invention provides a driving unit for rotating a rotating body having a rotating shaft, a distance measuring unit for measuring a rotating body surface distance that is a distance to the surface of the rotating body that is not perpendicular to the rotating axis and itself, and a driving unit. Timing control means for controlling the timing for measuring the rotating body surface distance at a predetermined number of rotating body surface positions by the distance measuring means during the rotating operation of the rotating body by the means; A rotation body vibration measuring apparatus comprising: a calculation unit for calculating a vibration amount of a rotation body based on a rotation body surface distance at a predetermined number of rotation body surface positions measured by a distance measurement unit according to timing control.

Therefore, in the method for measuring the run-out of the rotating body according to the present invention, the measurement of the surface distance of the rotating body is performed in accordance with the timing control by the timing control means. Measured.

Therefore, it is possible to improve the accuracy of the required amount of shake of the rotating body. Further, since the measurement of the surface distance of the rotating body is automatically executed according to the timing control by the timing control means, the time required for the measurement can be reduced even when the predetermined number is increased.

Further, in the vibration measuring device for a rotating body according to the present invention, the vibration amount of the rotating body is automatically measured.
The labor of the worker can be reduced. The present invention provides a driving means for rotating a rotating body having a rotating shaft, and a plurality of distance measuring means for measuring a rotating body surface distance which is a distance to the surface of the rotating body which is not perpendicular to the rotating axis and itself. And timing for controlling the timing for simultaneously measuring the rotating body surface distance at a predetermined number of rotating body surface positions equal to or greater than two by a plurality of distance measuring means during the rotating operation of the rotating body by the driving means. Control means, and calculating means for determining a shake amount of the rotating body based on the rotating body surface distance at a predetermined number of rotating body surface positions measured by each of the plurality of distance measuring means according to the timing control of the timing control means. A vibration measuring device for a rotating body comprising:

Therefore, in the vibration measuring apparatus for a rotating body according to the present invention, the surface distance of the rotating body can be measured by a plurality of distance measuring means at the same time according to the timing control by the timing control means, and the amount of vibration can be obtained.

Therefore, even when the amount of run-out of the rotating body is obtained on a plurality of circumferences of the rotating body perpendicular to the rotation axis, the working time can be reduced. In addition, since the work by a human system is reduced, even if the number of rotating body surface distances measured on the same circumference perpendicular to the rotation axis or the number of distance measuring means is large, the required vibration can be obtained. The accuracy and reliability of the quantity can be improved, and the labor of the operator can be reduced.

According to a first aspect of the present invention, there is provided an apparatus for measuring the runout of a rotating body according to claim 1 or 2, further comprising: A vibration measuring apparatus for a rotating body to which at least one measurement is performed and distance correcting means for correcting a surface distance of the rotating body using the at least one neighboring distance is added.

Therefore, in the vibration measuring apparatus for a rotating body according to the present invention, since the surface distance of the rotating body is corrected by the nearby distance, the influence of an error caused by unevenness on the surface of the rotating body can be reduced.

Therefore, the reliability of the required amount of runout of the rotating body can be further improved. The present invention relates to claim 1.
4. The apparatus according to claim 3, wherein an abnormality is determined based on whether a difference between surface distances of the rotating body measured at the same position on the surface of the rotating body is within a predetermined range. This is a shake measuring device for a rotating body to which an abnormality determination means for determination is added.

Therefore, the apparatus for measuring run-out of a rotating body according to the present invention can detect an abnormality in the measured surface distance of the rotating body, thereby further improving reliability.

Further, it is possible to accurately determine whether or not an abnormality has occurred. The present invention provides a vibration measuring device for a rotating body according to any one of claims 1 to 4,
When the rotating body is composed of at least one block, the swing amount of the rotating body is determined based on the shake amount obtained by the calculation means, the weight of the block, and a predetermined correction position defined in the block. Is a vibration measuring device for a rotating body to which a vibration correction amount calculating means for obtaining a vibration correction amount for correcting the correction for each block is added.

Therefore, in the vibration measuring apparatus for a rotating body according to the present invention, the amount of vibration correction is automatically obtained.
Reliable modifications can be performed. Further, it is possible to reduce the work time at the time of correction and to reduce the labor of the operator.

According to the present invention, in the vibration measuring apparatus for a rotating body according to any one of claims 1 to 5, a noise removing means for removing a noise component of a surface distance of the rotating body measured by the distance measuring means. Is a device for measuring run-out of a rotating body.

Therefore, in the vibration measuring device for the rotating body of the present invention, the vibration amount of the rotating body is obtained based on the surface distance of the rotating body from which noise has been removed. It can be further improved.

According to the present invention, in the vibration measuring apparatus for a rotating body according to any one of the first to sixth aspects, the vibration measuring of the rotating body using a digitally output distance measuring sensor as the distance measuring means. Device.

Therefore, in the rotating body runout measuring apparatus of the present invention, since the worker does not visually measure the rotating body surface distance, the rotating body surface distance can be accurately measured.

Further, even if the number of measuring the surface distance of the rotating body increases, the labor of the operator does not increase. Further, since the rotating body surface distance can be automatically measured, the working time can be reduced.

[0038]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same elements will be denoted by the same reference characters and description thereof will be omitted. Also, the same elements as those in FIGS. 9 and 10 described above are denoted by the same reference numerals, and description thereof will be omitted.

(First Embodiment) In this embodiment, an apparatus for automatically measuring the run-out of a rotating body will be described by taking a case where the rotating body is a turbine rotor as an example.

FIG. 1 is a block diagram showing an apparatus for measuring run-out of a rotating body according to the present embodiment, and illustrates a case where the rotating body is a turbine rotor. The vibration measuring device for the rotating body mainly includes a rotor driving device 7, a linear gauge sensor 8, an extension unit 9, a computer 10, a CRT 11, a printer 12
It is composed of

The rotor driving device 7 is a driving mechanism for rotating the turbine rotor 1 at a constant speed. The linear gauge sensor 8 includes the linear gauge sensor 8 itself and the rotating shaft 1.
This is an apparatus for measuring a rotating body surface distance, which is a distance between a and the surface of the turbine rotor 1 that is not perpendicular.

The linear gauge sensor 8 outputs the measured surface distance of the rotating body as a digital value. As shown in FIG. 2, the linear gauge sensor 8 is installed on a table 13 having a plane parallel to the rotation axis 1a of the turbine rotor 1 by a magnet type mounting jig 8a. From the turbine rotor 1. That is, this linear gauge sensor 8
Is a direction perpendicular to the rotation axis 1a of the turbine rotor 1, and measures the rotating body surface distance in a direction (radial direction) toward the rotation axis 1a.

The extension unit 9 is a surface of the turbine rotor 1 that is not perpendicular to the rotation axis 1a. In order to measure the distance, it has a function of controlling the timing of measurement. By measuring the surface distance of the rotating body according to the timing control, the surface distance of the rotating body is measured at a set measurement position on the circumference.

The computer 10 determines the amount of run-out of the turbine rotor 1 based on the measured variation in the surface distance of the rotating body. As the computer 10, for example, a personal computer or a workstation can be used.

The CRT 11 and the printer 12 are output devices, and notify an operator of a calculation result of a shake amount by the computer 10, an analysis result, and the like. Hereinafter, the operation of the rotating body runout measuring apparatus according to the present embodiment will be described.

In the vibration measuring device for a rotating body, first, the rotor driving device 7 rotates the turbine rotor 1 at a constant speed. At this time, every time the turbine rotor 1 makes one rotation, a reference signal is output from the rotor driving device 7 to the extension unit 9.

In the extension unit 9, timing control for outputting a trigger signal to the linear gauge sensor 8 is executed based on the rotation speed of the turbine rotor 1 by the rotor driving device 7 and the input reference signal. For example, when it is desired to measure the surface distance of the rotating body at four measurement positions at every 90 degrees on the circumference of the turbine rotor, the interval at which the reference signal is input is divided by 4 to obtain the interval time, and when the reference signal is input, A trigger signal is output every time the interval time elapses from the input of the reference signal.

Here, a case will be described as an example in which a trigger signal is output so that the surface distance of the rotating body is measured at four measurement positions every 90 degrees during one rotation of the turbine rotor 1. However, the present invention is not limited to this, and the trigger signal may be output at a plurality of positions. That is, this number may be, for example, 4, 8, 16, 32, or the like.

The means for determining the output timing of the trigger signal is not limited to the above-described means, and various methods can be applied as long as an accurate measurement position can be recognized. For example, the trigger signal may be output when it is recognized that the turbine rotor has rotated by a predetermined rotation angle from the input of the reference signal. Further, the trigger signal may be output at different intervals instead of being output at regular intervals.

The trigger signal output from the extension unit 9 is input to the linear gauge sensor 8. The linear gauge sensor 8 measures the surface distance of the rotating body when a trigger signal is input, and outputs the measured rotating body surface distance to the computer 10 via the extension unit 9 as a digital value.

The computer 10 calculates the amount of run-out of the turbine rotor 1 based on the rotating body surface distance measured a plurality of times during one rotation of the turbine rotor 1. The swing amount of the turbine rotor 1 calculated by the computer 10 is stored as a measurement history in a storage device (not shown), and is notified to the operator by the CRT 11 or the printer 12.

The history data stored in the storage device is stored in a database. As the storage device, a hard disk, a floppy disk, an MO (optical disk), an MD (mini disk), a magnetic tape, a memory card, and the like are applicable.

Based on the history data, the computer 10 calculates the secular change of the run-out amount of the turbine rotor 1 on the CRT 11.
It has a graph display function for displaying a graph. Further, the computer 10 has a bending amount prediction function of predicting a bending amount of the turbine rotor 1 from the deflection amount of the turbine rotor 1, and has a 3D display function of displaying a change in the bending amount on the CRT 11 three-dimensionally.

Further, the computer 10 has a tabulation function of tabulating the history data, and has a print output function of outputting the tabulated information from the printer 12 as a book in an inspection record format.

Each function of this computer, that is, a graph display function, a bend amount prediction function, a 3D display function, an aggregation function, a print output function, and the like can be realized by both hardware and software.

As described above, in the vibration measuring device for a rotating body according to the present embodiment, the rotor rotation drive device rotates the turbine rotor 1 at a constant speed, and the extension unit 9 controls the timing in accordance with the rotation speed. Is executed, the surface distance of the rotating body can be measured at a high speed at an accurate measurement position on the circumference of the turbine rotor 1 perpendicular to the rotating shaft 1a.

That is, when the apparatus for measuring the vibration of a rotating body according to the present embodiment is applied, the operator can obtain an accurate vibration amount of the rotating body only by instructing the vibration measuring apparatus for the rotating body to start measurement. Therefore, the measurement error caused by the work by the human system and the measurement by the human system is reduced.

The linear gauge sensor 8 is easy to install and prepare for measurement. Therefore, the required reliability of the amount of rotation of the rotating body is improved, the time required for measurement is shortened,
The labor of the worker can be reduced.

Further, in the rotating body deflection measuring apparatus according to the present embodiment, a predetermined number of rotating body surface distances are measured by the linear gauge sensor 8, and the computer 10 is operated based on the predetermined number of rotating body surface distances. Since the shake amount of the rotating body is calculated and recorded, calculation errors, transcription errors, and recording errors can be reduced, thereby further improving reliability.

(Second Embodiment) In this embodiment, a device for automatically measuring the amount of run-out of a rotating body in a plurality of circumferences perpendicular to the rotating shaft 1a at the same time will be described in the case where the rotating body is a turbine rotor 1. This will be described as an example.

FIG. 3 is a block diagram showing an apparatus for measuring run-out of a rotating body according to the present embodiment, and illustrates a case where the rotating body is a turbine rotor 1. FIG. 4 is a system configuration diagram illustrating a shake measuring device for a rotating body according to the present embodiment.

The vibration measuring device for the rotating body mainly includes a rotor driving device 7, an extension unit 9, a plurality of linear gauge sensors 8, a flexible measuring system 14, a computer 10,
An RT 11 and a printer 12 are provided.

The extension unit 9 is based on the reference signal
Executes timing control and outputs a trigger signal to the flexible measurement system 14. The flexible measurement system 14 has a large number of channels (here, 20 channels) as shown in FIG.

The flexible measuring system 14 is connected to the extension unit 9 by a cable 15 so as to be able to input and output signals, and is connected to a plurality of linear gauge sensors 8 for each individual channel. In the flexible measurement system 14 shown in FIG. 5, up to 20 linear gauge sensors 8 can be connected.

The flexible measurement system 14 outputs a measurement command signal to a plurality of linear gauge sensors 8 simultaneously based on the input of the trigger signal. In addition, the flexible measurement system 14 simultaneously inputs the rotating body surface distances measured by the plurality of linear gauge sensors 8 and outputs the same to the extension unit 9 as a measurement signal.

The computer 10 has a function of recording the input measurement signal and calculating a shake amount for each linear gauge sensor 8 based on the measurement signal. This computer 10
It can be operated by the keyboard 16.

Hereinafter, the operation of the vibration measuring device for rotating bodies according to the present embodiment will be described. In the vibration measuring device for a rotating body, first, the rotor driving device 7 rotates the turbine rotor 1 at a constant speed, and a reference signal is output to the extension unit 9 every time the turbine rotor 1 makes one rotation.

The reference signal input section 9a of the extension unit 9
When the reference signal is input, the timing control section 9b
Output to The timing control section 9b executes timing control based on the reference signal input time point, and outputs a trigger signal to the flexible measurement system 14.

In the flexible measurement system 14, the trigger signal input section 14a inputs a trigger signal, and when the trigger signal is input, outputs the fact to the measurement command output section 14b. The measurement command output unit 14b outputs a measurement command signal to a plurality of linear gauge sensors 8 when a trigger signal is input.

When each of the linear gauge sensors 8 receives the measurement command signal, each linear gauge sensor 8 measures the surface distance of the rotating body and outputs it to the flexible measurement system 14. The flexible measuring system 14 inputs a plurality of rotating body surface distances measured by each linear gauge sensor 8 at the distance input unit 14c.

The distance input section 14c outputs the input plurality of rotating body surface distances as measurement signals to the measurement signal output section 14d. The measurement signal output unit 14d outputs the measurement signal input from the distance input unit 14c to the extension unit 9.

The extension unit 9 converts the measurement signal output from the flexible measurement system 14 into a measurement signal input unit 9.
Enter c. The measurement signal input unit 9c outputs the input measurement signal to the output unit 9d.

The output section 9d outputs the measurement signal to the computer 10. In the computer 10, the runout of the turbine rotor 1 is calculated for each linear gauge sensor 8 based on the measurement signal obtained by the above operation, and each function stored in the computer 10 is executed. , Or as a book 17.

As described above, in the vibration measuring apparatus for a rotating body according to the present embodiment, by adding the flexible measuring system 14, the surface distance of the rotating body can be measured by a plurality of linear gauge sensors 8 at the same time. Therefore, the working time can be reduced. Also,
The labor of the worker can be reduced.

(Third Embodiment) In this embodiment, the surface distance of the rotating body is measured by the linear gauge sensor 8 even in the circumferential direction near the measurement surface position of the rotating body for measuring the surface distance of the rotating body. A vibration measuring device for a rotating body that corrects the rotating body surface distance using the nearby rotating body surface distance (hereinafter, referred to as “nearest distance”) will be described.

An example of the correction process executed by the rotation measuring apparatus according to the present embodiment will be described below. FIG.
FIG. 2 is a conceptual diagram of a measurement of a rotating body surface distance and a neighborhood distance in a rotating body runout measuring device according to the present embodiment, illustrating a case where the rotating body is a turbine rotor 1.

FIG. 6 exemplifies the case of _four measurement positions P _{1 to} P ₄ substantially every 90 degrees. However, the present invention is not limited to this, and the number of measurement positions on the circumference is plural. If you can, you can set it up freely.

The extension unit 9 is based on the reference signal
A trigger signal is output, and at least one trigger signal is output in a time near the time when the trigger signal is output.

As a result, at least one (here, four) neighboring distances N _{1 to} N ₄ are measured at positions near the rotating body surface distance d ₁ measured based on the reference signal. The computer 10 calculates, based on the _four neighboring distances N _{1 to} N ₄ ,
Modifying the rotating member surface a distance d ₁ which is used to calculate the deflection amount.

For example, the rotating body surface distance d at the measurement position P _1
The maximum value and the minimum value are excluded from the calculation target from among the _one and four neighboring distances N _{1 to} N ₄ , the average of the remaining values is obtained, and this average value is set as the rotating body surface distance d ₁ at the time of outputting the trigger signal. .

[0081] As described above, in the run-out measuring device for a rotary body according to the present embodiment, the rotating surface distance d1 measured, for correcting the rotating surface distance N ₁ to N ₄ in the vicinity, It is possible to reduce the influence of irregularities on the surface of the turbine rotor 1 that change due to aging of the turbine rotor 1 or the like.

Therefore, the reliability of the required shake amount can be improved. (Fourth Embodiment) In this embodiment, when the difference in the surface distance of the rotating body measured at the same measurement position on the same circumference of the rotating body is not within a predetermined range, the rotating body which is determined to be abnormal is determined. This is a shake measurement device.

In the following, a case where the rotating body is the turbine rotor 1 will be described as an example. In the rotating body shake measuring apparatus according to the present embodiment, the computer 10 executes an abnormality determination process. That is, the computer 10 has an abnormality determination function.

First, the computer 10 refers to the history data recorded in the past and calls (displays) the surface distance of the rotating body at an arbitrary position. Next, the computer 10 reads the newly measured rotating body surface distance at the same measurement position as the called rotating body surface distance at an arbitrary position in the past and after the turbine rotor 1 makes one rotation.

Then, if the difference between the two rotating body surface distances is not within the predetermined range, the computer 10 determines that there is an abnormality. If the computer 10 determines that an abnormality has occurred, a message indicating that an abnormality has occurred is displayed on the CRT 11 and the operator is notified.

As described above, in the rotating body runout measuring apparatus according to the present embodiment, the difference between the arbitrary rotating surface distance and the rotating surface distance measured after one rotation of the turbine rotor is included in the predetermined range. To notify you of an abnormality if
The reliability of the required shake amount can be improved.

Further, since it is automatically determined whether or not there is an abnormality, it is possible to prevent a determination error. (Fifth Embodiment) In this embodiment, a description will be given of a rotating body shake measuring apparatus capable of correcting the shake amount based on the measured shake amount.

FIG. 7 is a diagram showing the concept of the shake amount correction processing in the rotating body shake measuring apparatus according to the present embodiment. The turbine rotor 1 is composed of one or more (two in FIG. 7) blocks B ₁ and B ₂ in advance.

This turbine rotor 1 has blocks B ₁ ,
Weights W ₁ and W ₂ are determined for each B ₂ . Furthermore, this turbine rotor 1, for each block B _1, B _2, center of gravity position or deflection correction position S ₁ obtained from the supporting point of the turbine rotor 1 for each block, S ₂ are determined.

Each block B ₁ , B _{2 is} calculated by the computer 10.
When the shake amount is calculated for each block, the computer 10 calculates the shake amount, the correction positions S ₁ and S _2, and the weight W of each block B ₁ and B ₂ .
₁ , W ₂ (constant data) from turbine rotor 1
Of the turbine rotor 1 is displayed on the CRT 11, and deflection correction weights Z ₁ and Z ₂ required for the correction of the bending are calculated and output to the CRT 11.

The computer 10 graphically displays the secular change of the state of the turbine rotor 1 from the measured values in the database, and predicts the future state of the turbine rotor 1 from the graphed bending value of the turbine rotor 1. Has functions.

The operator calculates the calculated shake correction weight Z.
₁ and Z ₂ are attached to the correction positions S ₁ and S ₂ to correct the run-out of the turbine rotor 1 for each of the blocks B ₁ and B ₂ . That is, the correction position S _{1 of} each block B ₁ , B ₂ ,
By mounting the weight of the modified weight Z _1, Z ₂ swings S _2, fixes the bending of the turbine rotor 1, thereby deflection of the turbine rotor 1 is fixed.

Therefore, in the vibration measuring device for a rotating body according to the present embodiment, it is possible to reduce the working time and the labor of the operator when correcting the vibration. Therefore, maintenance of the rotating body can be facilitated.

Further, since the amount of bending can be predicted by analyzing the bending of the turbine rotor 1, the amount of deflection of the turbine rotor 1 can be further corrected based on the predicted value of the amount of bending.

(Sixth Embodiment) In this embodiment, a description will be given of a vibration measuring device of a rotating body which executes a noise removing process for removing a noise component of the measured rotating body surface distance.

FIG. 8 is a conceptual diagram of the noise elimination processing executed in the vibration measuring apparatus for a rotating body according to the present embodiment. In this noise removal processing, the noise component is obtained by performing Fourier series expansion of the surface distance of the rotating body measured by the same linear gauge sensor 8, that is, the surface distance of the rotating body on the same circumference, and removing and synthesizing high-frequency components. Is removed.

The noise removal processing is executed by the computer 10, and the computer 10 calculates the amount of shake based on the surface distance of the rotating body from which the noise has been removed. As described above, in the vibration measuring device for a rotating body according to the present embodiment, the vibration component is calculated by removing the noise component of the rotating body surface distance that locally protrudes due to a scratch or the like of the turbine rotor 1. The accuracy and reliability of the required amount of shake can be further improved.

(Seventh Embodiment) In this embodiment, a modified example from the first embodiment to the sixth embodiment will be described.

In the vibration measuring apparatus for a rotating body according to the first to sixth embodiments, the case where the rotating body is a turbine rotor has been described as an example. However, the present invention is not limited to this. It can be applied to rotating bodies.

In the vibration measuring device for the rotating body according to the first embodiment, the rotating body surface distance measured by the linear gauge sensor 8 is calculated by the computer 1 via the extension unit 9.
Although output to 0, the present invention is not limited to this, and the rotating body surface distance may be directly output from the linear gauge sensor 8 to the computer 10.

In the vibration measuring apparatus for a rotating body according to the first embodiment, only the reference signal is output from the rotor drive unit 7 to the extension unit 9, and the extension unit 9 outputs the trigger signal based on only the reference signal. Is performed, but the present invention is not limited to this. For example, in addition to the reference point signal, a rotor rotation angle signal, a rotor rotation speed signal, and the like are also output from the rotor driving device 7 to the extension unit 9, and the extension unit 9 may execute timing control based on these signals.

Further, in the vibration measuring device for the rotating body according to the first embodiment, the case where the linear gauge sensor 8 is applied as the distance measuring device has been described. However, the device is not particularly limited as long as the device measures the distance. Not something
For example, an apparatus for measuring a distance by irradiating and reflecting light or sound waves such as a laser beam may be applied.

Next, in the second embodiment, FIG.
5 to FIG. 5, an example in which four linear gauge sensors 8 are connected to the flexible measurement system 14 has been described. However, the present invention is not limited to this, and one or more linear gauge sensors 8 may be used. In the case of, it can be applied freely.

In the vibration measuring apparatus for a rotating body according to the second embodiment, the flexible measuring system 14 is used.
From the computer 10 via the extension unit 9
, But is not limited to this.
The measurement signal may be output directly from the flexible measurement system 14 to the computer 10.

Further, in the vibration measuring apparatus for a rotating body according to the second embodiment, the flexible measuring system 1
4. The plurality of rotating body surface distances are collectively handled as measurement signals between the extension unit 9 and the computer 10, but the present invention is not limited to this, and the plurality of rotating body surface distances may be communicated serially or in parallel. Is also good.

Next, in the third embodiment, as a method of correcting the surface distance d ₁ of the rotating body, the maximum value and the minimum value are excluded from the calculation target and the average value is obtained. However, the present invention is not limited to this. Instead, various correction methods can be applied. For example It can be simply obtain an average, the intermediate value may be a rotating member surface a distance d ₁ are arranged in ascending or descending order.

In the third embodiment, the case where _four neighboring distances N _{1 to} N ₄ are measured has been described as an example. However, the number of neighboring distances to be measured is not limited to this. , Can be changed freely.

Next, in the vibration measuring device for the rotating body according to the fourth embodiment, the abnormality is determined based on the surface distance of the rotating body after one rotation. However, the present invention is not limited to this. The abnormality may be determined based on the surface distance of the rotating body after the rotation.

Further, in the vibration measuring apparatus for rotating body according to the fourth embodiment, when the computer 10 determines that there is an abnormality, the operator is immediately notified of the abnormality, but the invention is not limited to this. However, the computer 10 may notify the operator of the abnormality only when the abnormality is determined a predetermined number of times, for example. Further, when an abnormality is determined, re-determination may be performed, and when the re-determination also determines that an abnormality has occurred, the operator may be notified of the abnormality.

Next, in the vibration measuring apparatus for a rotating body according to the fifth embodiment, the case where the turbine rotor 1 is composed of _two blocks B ₁ and B ₂ has been described as an example. However, the present invention is not limited to this, and can be similarly applied to a configuration including one or three or more blocks.

Further, in the vibration measuring apparatus for a rotating body according to the sixth embodiment, the case where Fourier series expansion is used as the noise removal processing has been described. However, the present invention is not limited to this. Various other noise removal processes such as quantization may be applied.

[0112]

As described above in detail, in the vibration measuring apparatus for a rotating body according to the present invention, at least one distance measuring means measures a plurality of rotating body surface distances in accordance with the timing control by the timing control means. Since the calculation means calculates the amount of shake of the rotator based on the measured surface distance of the rotator, work by a human system is greatly reduced, and the amount of shake of the rotator can be automatically obtained.

As a result, it is possible to reduce the measurement by the operator's visual observation, the displacement of the measurement position of the rotating body surface distance, the error in writing the measurement result, etc., and to improve the accuracy and reliability of the required shake amount. Can be.

Further, it is possible to reduce the time required for measuring the amount of shake of the rotating body, and to reduce the labor of the operator. In addition, by correcting the measured rotating body surface distance by using the rotating body surface distance at a nearby position, it is possible to eliminate a variation in a value caused by the surface state of the rotating body, and to obtain the reliability of the required shake amount of the rotating body. Can be further improved.

Further, by adding an abnormality judging means, it is possible to reduce mistakes in judging whether or not there is an abnormality. Further, when the rotating body is composed of at least one block, the bending of the rotating body is predicted based on the obtained runout amount, the weight of the block, and the corrected position, and the bending state is displayed. It is possible to calculate the amount of correction required for correcting this bending.

Further, it is also possible to predict a future bending from the aging of the predicted bending and predict a future vibration correction amount. Furthermore, since the noise at the surface distance of the rotating body measured by the noise removing means is removed, the reliability of the required shake amount of the rotating body can be further improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an apparatus for measuring run-out of a rotating body according to a first embodiment of the present invention.

FIG. 2 is a state diagram showing an installation state of a linear gauge sensor.

FIG. 3 is a block diagram showing an apparatus for measuring run-out of a rotating body according to a second embodiment of the present invention;

FIG. 4 is a system configuration diagram showing a rotating body runout measuring apparatus according to the embodiment;

FIG. 5 is a perspective view of a flexible measurement system.

FIG. 6 is a conceptual diagram of a measurement of a rotating body surface distance and a neighborhood distance in a rotating body shake measuring apparatus according to a third embodiment of the present invention.

FIG. 7 is a conceptual diagram showing a shake amount correction process in a rotating body shake measuring apparatus according to a fifth embodiment of the present invention.

FIG. 8 is a conceptual diagram showing a noise removal process executed in a vibration measuring device for a rotating body according to a sixth embodiment of the present invention.

FIG. 9 is a side view showing the concept of a conventional turbine rotor runout measuring method.

FIG. 10 is a sectional view of a turbine rotor perpendicular to a rotation axis.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Turbine rotor 1a ... Rotary axis 2 ... Support point 3 ... Surface plate 4 ... Fixed base 5 ... Dial gauge 6a-6f ... Worker 7 ... Rotor drive device 8 ... Linear gauge sensor 9 ... Expansion unit 10 ... Computer 11 ... CRT 12 … Printer 13… Stand 14… Flexible measurement system 15… Cable 16… Keyboard 17… Book list

Claims (7)

[Claims] A driving means for rotating a rotating body having a rotating shaft; a distance measuring means for measuring a rotating body surface distance which is a distance from the surface of the rotating body which is not perpendicular to the rotating axis to the rotating body; A timing control means for controlling a timing for measuring the rotating body surface distance at a predetermined number of rotating body surface positions equal to or greater than 2 by the distance measuring means during the rotating operation of the rotating body by the driving means; Computing means for calculating a shake amount of the rotating body based on the rotating body surface distance at the predetermined number of rotating body surface positions measured by the distance measuring means according to the timing control of the timing control means. A vibration measuring device for a rotating body, characterized in that: 2. A driving means for rotating a rotating body having a rotating shaft, and a plurality of distances for measuring a rotating body surface distance which is a distance to the surface of the rotating body which is not perpendicular to the rotating axis and itself. Measuring means, for rotating the rotating body by the driving means, the plurality of distance measuring means for measuring the rotating body surface distance simultaneously and at a predetermined number of rotating body surface positions of 2 or more. Timing control means for controlling timing, based on the rotating body surface distance at the predetermined number of rotating body surface positions measured by each of the plurality of distance measuring means according to the timing control of the timing control means, And a calculating means for calculating a shake amount of the rotating body. 3. The apparatus for measuring run-out of a rotating body according to claim 1, wherein the distance measuring unit measures at least a nearby distance that is a rotating body surface distance in a circumferential direction near a position where the rotating body surface distance is measured by the distance measuring unit. An apparatus for measuring run-out of a rotating body, characterized by further comprising a distance correcting means for measuring one and correcting the surface distance of the rotating body using the at least one neighboring distance. 4. The apparatus for measuring run-out of a rotating body according to claim 1, wherein a difference between surface distances of the rotating body measured at the same position on the surface of the rotating body is a predetermined value. An apparatus for measuring the run-out of a rotating body, characterized by adding an abnormality determining means for determining an abnormality based on whether it is within a range. 5. The apparatus according to claim 1, wherein the rotational body is measured by the arithmetic unit when the rotational body is composed of at least one block. A shake correction amount calculation for obtaining a shake correction amount for correcting the shake amount of the rotating body for each block based on the shake amount, the weight of the block, and a predetermined correction position defined in the block. A vibration measuring device for a rotating body, characterized by adding means. 6. The apparatus for measuring vibration of a rotating body according to claim 1, wherein a noise component of the surface distance of the rotating body measured by the distance measuring means is removed. A vibration measuring device for a rotating body, characterized by adding a symbol. 7. The rotating body runout measuring device according to claim 1, wherein a digitally output distance measuring sensor is used as the distance measuring means. Body shake measurement device.