CN110779438A - Rotor bending value measuring method, steam turbine generator and computer readable storage medium - Google Patents
Rotor bending value measuring method, steam turbine generator and computer readable storage medium Download PDFInfo
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- CN110779438A CN110779438A CN201911049142.6A CN201911049142A CN110779438A CN 110779438 A CN110779438 A CN 110779438A CN 201911049142 A CN201911049142 A CN 201911049142A CN 110779438 A CN110779438 A CN 110779438A
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
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Abstract
The invention provides a method for measuring a bending value of a rotor of a steam turbine generator unit, the steam turbine generator and a computer readable storage medium, wherein the steam turbine generator unit comprises a phase discrimination sensor and a shaft vibration sensor, and the method comprises the following steps: acquiring the rotation period of the rotor measured by the phase discrimination sensor, and acquiring an eddy current sensor signal measured by a shaft vibration sensor; carrying out Fourier transform on the signal of the eddy current sensor in the rotation period to obtain a sine wave signal; and calculating a rotor bending value through the sine wave signal. The rotor bending value is calculated through the phase detection sensor and the shaft vibration sensor arranged at each section of the rotor, so that the bending value of all the rotors can be measured without additionally adding equipment.
Description
Technical Field
The invention relates to the technical field of rotor bending measurement, in particular to a method for measuring a bending value of a rotor of a steam turbine generator unit, a steam turbine generator and a computer readable storage medium.
Background
The steam turbine generator rotor is often deformed due to various reasons such as long-term static gravity, impact of cold steam and cold water, uneven heating of coils and the like, so that the rotor is not a straight line, namely, is bent to a certain extent. The bent rotor is arranged, centrifugal force is generated due to the fact that the bending high point and the rotating center are not concentric in the rotating process, the rotor is further bent and aggravated under the action of the centrifugal force, and then serious accidents of dynamic and static collision and friction and strong vibration occur, and the turbo generator set cannot be started or operated normally. In order to solve the problem, in the prior art, the bending of the rotor is mostly detected by adopting a phase detection sensor and eccentricity in a TSI (transient state interface) system of the turbonator, however, the phase detection sensor and the eccentricity are only arranged in front of and behind the high-pressure section rotor, so that the bending values of the middle-pressure section rotor, the low-pressure section rotor, the generator section rotor and the exciter section rotor cannot be measured.
Disclosure of Invention
The invention mainly aims to provide a method for measuring a bending value of a rotor of a steam turbine generator unit, the steam turbine generator and a computer readable storage medium, and aims to solve the problem that all the bending values of the rotor cannot be measured in the prior art.
In order to achieve the above object, the present invention provides a method for measuring a bending value of a rotor of a steam turbine generator unit, the method comprising the steps of:
the method for measuring the bending value of the rotor of the steam turbine generator unit is characterized in that the steam turbine generator unit comprises a phase discrimination sensor and a shaft vibration sensor arranged at each section of the rotor, and the method comprises the following steps:
acquiring the rotation period of the rotor measured by the phase discrimination sensor, and acquiring an eddy current sensor signal measured by a shaft vibration sensor;
carrying out Fourier transform on the signal of the eddy current sensor in the rotation period to obtain a sine wave signal synchronous with the rotation period of the rotor;
and calculating a rotor bending value through the sine wave signal.
Optionally, a groove formed in the rotor in the axial direction is provided, and the step of measuring the rotation period of the rotor by the phase discrimination sensor includes:
when the groove is detected to pass through a phase discrimination sensor, a corresponding pulse signal is obtained through the phase discrimination sensor;
the rotation period of the rotor is obtained by calculating the interval of two consecutive pulse signals.
Optionally, a reflective belt provided along an axial direction is provided on the rotor, and the step of measuring the rotation period of the rotor by the phase discrimination sensor includes:
when the reflective tape is detected to pass through the phase discrimination sensor, a corresponding pulse signal is obtained through the phase discrimination sensor;
the rotation period of the rotor is obtained by calculating the interval of two consecutive pulse signals.
Optionally, the step of acquiring the eddy current sensor signal measured by the shaft vibration sensor comprises:
an eddy current sensor signal based on a distance between the rotor surface and the shaft vibration sensor is output by the shaft vibration sensor.
Optionally, the step of performing fourier transform on the eddy current sensor signal to obtain a sine wave signal includes:
the signal of the eddy current sensor is subjected to Fourier transform of the rotation period to obtain a model of
The sine wave signal of (1); wherein t represents time, x (t) represents the shaft vibration signal, and x
0Is a constant, n is an integer, 2 pi is a constant, A
nRepresenting a single peak of each sine wave signal, T representing said phase signatureRotor rotation period, phi, measured by phase sensors
nPhase angle information of each sine wave signal is represented.
Optionally, the step of calculating the rotor bending value by the sine wave signal comprises:
acquiring a voltage value of the sine wave signal synchronous with the rotation period of the rotor;
and calculating a rotor bending value according to the voltage value of the sine wave signal.
Optionally, the step of calculating the rotor bending value according to the voltage value of the sine wave signal includes:
and converting the voltage value of the sine wave signal into a rotor bending value according to the sensitivity of the shaft vibration sensor.
To achieve the above object, the present invention further provides a steam turbine generator, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when executed by the processor, the computer program implements the following steps:
acquiring the rotation period of the rotor measured by the phase discrimination sensor, and acquiring an eddy current sensor signal measured by a shaft vibration sensor;
carrying out Fourier transform on the signal of the eddy current sensor in the rotation period to obtain a sine wave signal synchronous with the rotation period;
and calculating a rotor bending value through the sine wave signal.
Optionally, the computer program when executed by the processor further implements the steps of:
when the groove is detected to pass through a phase discrimination sensor, a corresponding pulse signal is obtained through the phase discrimination sensor;
the rotation period of the rotor is obtained by calculating the interval of two consecutive pulse signals.
To achieve the above object, the present invention also provides a steam turbine generator including a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program implementing the steps of the input display method as described above when executed by the processor.
To achieve the above object, the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the method for measuring a bending value of a rotor of a steam turbine generator unit as described above.
The invention provides a method for measuring a rotor bending value of a turbo generator unit, a turbo generator and a computer readable storage medium, wherein the turbo generator unit comprises a phase discrimination sensor and a shaft vibration sensor, the rotation period of a rotor measured by the phase discrimination sensor is obtained, and an eddy current sensor signal measured by the shaft vibration sensor is obtained; carrying out Fourier transform on the signal of the eddy current sensor in the rotation period to obtain a sine wave signal; and calculating a rotor bending value through the sine wave signal. The rotor bending value is calculated through the phase discrimination sensor and the shaft vibration sensor arranged at each section of the rotor, so that the bending value of all the rotors can be measured under the condition of not additionally adding equipment or measuring points.
Drawings
FIG. 1 is a schematic flow chart of a first embodiment of a method for measuring a bending value of a rotor of a steam turbine generator unit according to the present invention;
FIG. 2 is a schematic layout of a phase discrimination sensor, an eccentricity and shaft oscillation sensor of the present invention;
FIG. 3 is a schematic view of the shaft vibration sensor measurement of the present invention;
FIG. 4 is a schematic diagram of a sinusoidal signal obtained by periodic Fourier transform of an eddy current sensor signal according to the present invention;
FIG. 5 is a schematic diagram of a phase discrimination sensor measurement of the present invention;
fig. 6 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a method for measuring a bending value of a rotor of a steam turbine generator unit, and with reference to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of the method for measuring the bending value of the rotor of the steam turbine generator unit, and the method comprises the following steps:
step S10, obtaining the rotation period of the rotor measured by the phase discrimination sensor and obtaining the eddy current sensor signal measured by the shaft vibration sensor;
large turbo generator sets are generally equipped with a TSI (Turbine Supervisory Instruments), and an eddy current sensor signal for measuring a distance between a rotor surface and a shaft vibration sensor through a shaft vibration sensor in the TSI is used for measuring a rotation period of a rotor through the phase detection sensor because the shaft vibration sensor and the phase detection sensor measure the same rotor. The TSI is a permanent monitoring system that integrates protection and detection functions. The system monitors and stores some important parameters of the unit in the starting and running processes, can not only indicate the running state of the unit, record output signals, realize numerical value out-of-limit alarm and automatically stop the unit when dangerous signals appear, but also can provide data for fault diagnosis, and is an important equipment system for ensuring the safe running of the unit. The monitoring parameters of the system are: the method comprises the following steps of monitoring the rotating speed of a unit, monitoring the zero rotating speed of the unit triggering automatic barring, monitoring the axial displacement of a rotor, monitoring the shafting eccentricity, monitoring the expansion of the unit and monitoring the shafting vibration of the unit.
The steam turbine generator unit rotor is a shaft system which is approximately straight and is formed by connecting rotor sections of a steam turbine, namely a high-pressure rotor, a medium-pressure rotor, a low-pressure rotor and a generator rotor (comprising a collecting ring short shaft and an exciter rotor) through a coupling. In the actual work of the steam turbine generator unit, the working condition difference of each section of rotor is large. If the working temperature of the high-pressure rotor and the medium-pressure rotor is very high, the working temperature is often over 600 ℃; the low-pressure rotor has large temperature difference, and the rotor part of the low-pressure rotor is in a high-humidity and negative-pressure environment; the rotor of the generator set is provided with a tooth-shaped groove for arranging the magnet exciting coil, and the magnet exciting coil can generate uneven heat in the working process.
The phase discrimination sensor is called as a phase discrimination mark by arranging a groove or a convex key on a measured shaft. When the groove or the convex key is rotated to the position of the probe of the phase discrimination sensor, the distance between the probe of the phase discrimination sensor and the measured surface is changed, the sensor can generate a pulse signal, the pulse signal can be generated when the shaft rotates for one circle, and the generated time indicates the position of the shaft in each rotation period. By counting the pulses, the rotational speed of the shaft can thus be measured; by comparing the pulse with the vibration signal of the shaft, the phase angle of the vibration can be determined, and the phase angle can be used for dynamic balance analysis of the shaft, fault analysis and diagnosis of equipment and the like.
The shaft vibration sensor is a relative non-contact measurement type sensor, also called relative vibration. The vibration displacement or amplitude of an object is measured by the change of the distance between the end part of a sensor and the object to be measured.
Referring to fig. 2, fig. 2 is a schematic diagram of the arrangement of a phase discrimination sensor, an eccentricity and a shaft vibration sensor of the present invention, in the prior art, when a bending value of a rotor is measured, the bending value is measured by the phase discrimination sensor and the eccentricity, and since the eccentricity is only arranged in a high-pressure rotor section, the bending value of other sections of rotors cannot be measured or the bending value of other sections of rotors cannot be measured accurately. In the embodiment, the high-pressure section rotor, the medium-pressure section rotor and the low-pressure section rotor are supported by 2 bearings, and the generator section rotor and the exciter section rotor are supported by 3 bearings for 9 bearings. Each bearing is equipped with 2 shaft vibration sensors to measure rotor vibration.
Step S20, carrying out Fourier transform on the eddy current sensor signal in the rotation period to obtain a sine wave signal synchronous with the rotation period;
referring to fig. 3, fig. 3 is a schematic diagram of the measurement of the shaft vibration sensor of the present invention, in which various interference signals are superimposed on the waveform of the eddy current sensor signal measured by the shaft vibration sensor, and in order to eliminate the interference, the signal of the eddy current sensor is subjected to fourier transform of the rotation period to obtain the sine wave signal shown in fig. 4.
The fourier transform means that a certain function satisfying a certain condition can be expressed as a trigonometric function or a linear combination of their integrals. In different fields of research, fourier transforms have many different variant forms, such as continuous fourier transforms and discrete fourier transforms. Initially fourier analysis was proposed as a tool for analytical analysis of thermal processes.
Step S30, calculating a rotor bending value from the sine wave signal.
According to various parameters of the sine wave signal, the bending value of the rotor can be represented. In this embodiment, the amplitude of the sine wave signal is a voltage value output by the shaft vibration sensor, the distance between the corresponding shaft vibration sensor and the surface of the rotor can be converted by the voltage value output by the shaft vibration sensor, and the bending value of the rotor can be calculated by measuring the distance between the shaft center of the rotor and the probe of the shaft vibration sensor because the relative distances between the shaft center of the rotor and the probe of the shaft vibration sensor are consistent.
The steam turbine generator unit comprises a phase discrimination sensor and a shaft vibration sensor, and rotor data measured by the phase discrimination sensor and the shaft vibration sensor are obtained; and calculating a rotor bending value through the rotor data. The eddy current sensor signals are measured through the phase detection sensor and the shaft vibration sensor arranged at each section of the rotor, so that the bending value of the rotor is calculated, and the bending value of all the rotors can be measured without additionally adding equipment.
Further, in a second embodiment of the method for measuring a bending value of a rotor of a steam turbine generator unit according to the present invention based on the first embodiment of the present invention, the rotor is provided with a groove opened along an axial direction, and the step S10 includes the steps of:
when the groove is detected to pass through a phase discrimination sensor, a corresponding pulse signal is obtained through the phase discrimination sensor;
the rotation period of the rotor is obtained by calculating the interval of two consecutive pulse signals.
Further, in a third embodiment of the method for measuring a bending value of a rotor of a steam turbine generator unit according to the present invention based on the first embodiment of the present invention, the rotor is provided with a reflective tape disposed along an axial direction, and the step S10 includes the steps of:
when the reflective tape is detected to pass through the phase discrimination sensor, a corresponding pulse signal is obtained through the phase discrimination sensor;
the rotation period of the rotor is obtained by calculating the interval of two consecutive pulse signals.
Set up recess or luminous area for providing the phase discrimination mark for the phase discrimination sensor, refer to fig. 5, when recess or reflective band along with the rotor rotation to the probe position of phase discrimination sensor, the phase discrimination sensor can produce a pulse signal, works as recess or reflective band are along with the rotor is every round, and the phase discrimination sensor will produce a pulse signal, consequently can measure the rotation cycle of rotor through the phase discrimination sensor.
The rotation period of the rotor can be measured under the condition that other equipment or measuring points are not added by arranging the grooves or the reflecting belts on the phase discrimination sensor to measure the rotation period of the rotor.
Further, the step of acquiring the eddy current sensor signal measured by the shaft vibration sensor includes:
an eddy current sensor signal based on a distance between the rotor surface and the shaft vibration sensor is output by the shaft vibration sensor.
The voltage signal output by the shaft vibration sensor changes along with the change of the distance between the probe of the shaft vibration sensor and the surface of the rotor, the signal of the eddy current sensor measured by the shaft vibration sensor represents the distance between the surface of the rotor and the shaft vibration sensor, under the ideal condition, the waveform of the signal of the eddy current sensor measured by the shaft vibration sensor of an absolutely unbent rotor is a straight line, and in the actual work, the absolutely unbent rotor does not exist, and the condition that one end is higher and the other end is lower can be presented on the rotor, so the waveform of the signal of the eddy current sensor measured by the shaft vibration sensor is similar to a sine wave signal.
An eddy current sensor signal based on a distance between the rotor surface and the shaft vibration sensor is output by the shaft vibration sensor. The waveform of the distance between the surface of the rotor and the shaft vibration sensor can be directly obtained without adding other devices or measuring points, and a basis is provided for calculating the bending value of the rotor later.
Further, the step of performing fourier transform on the eddy current sensor signal in the rotation period to obtain a sine wave signal synchronized with the rotation period includes:
the signal of the eddy current sensor is subjected to Fourier transform of the rotation period to obtain a model of
The sine wave signal of (1); wherein t represents time, x (t) represents the shaft vibration signal, and x
0Is a constant, n is an integer, 2 pi is a constant, A
nRepresenting a single peak of each sine wave signal, T representing the rotor rotation period measured by the phase discrimination sensor, phi
nPhase angle information of each sine wave signal is represented.
When n is 1, a sinusoidal signal with the same rotation period as the rotor is obtained, and when n is 1, the sinusoidal signal component is
A
1Is the rotor deflection value, phi
nTo bend the phase angle of the value, the time trigger point of the phase-detected signal is positioned at 0, phi
nI.e. the rotor bend angle.
After the eddy current sensor signal and the rotation period of the rotor are obtained, the eddy current sensor signal is subjected to Fourier transform of the rotation period, so that interference signals can be eliminated, and the measured rotor bending value is more accurate.
Further, the step of calculating the rotor bending value from the sine wave signal includes:
acquiring a voltage value of the sine wave signal synchronous with the rotation period of the rotor;
and calculating a rotor bending value according to the voltage value of the sine wave signal.
The step of calculating the rotor bending value according to the voltage value of the sine wave signal comprises the following steps:
and converting the voltage value of the sine wave signal into a rotor bending value according to the sensitivity of the shaft vibration sensor.
According to a sine wave signal obtained by performing Fourier transform on the signal of the eddy current sensor in the rotation period, half of the amplitude of the sine wave signal is a voltage value at the moment; the sensitivity of the shaft vibration sensor is a coefficient for converting a unit voltage value in a sine wave signal into a unit length value, and the voltage value at each moment is converted into the length value, so that the bending value of the rotor can be represented; the length value is the distance between the surface of the rotor and the shaft vibration sensor, and the bending condition of the rotor can be obtained by analyzing the length value at each moment.
After the voltage value of the sine wave signal is obtained, the rotor bending value is represented by converting the voltage value into a length value, so that the obtained rotor bending data are clear and convenient to count.
Referring to fig. 6, the steam turbine generator may include components such as a communication module 10, a memory 20, and a processor 30 in a hardware configuration. In the steam turbine generator, the processor 30 is connected to the memory 20 and the communication module 10, respectively, and the memory 20 stores thereon a computer program which is executed by the processor 30 at the same time, and when executed, implements the steps of the above-mentioned method embodiment.
The communication module 10 may be connected to an external communication device through a network. The communication module 10 may receive a request from an external communication device, and may also send the request, an instruction, and information to the external communication device, where the external communication device may be another turbine generator, a server, or an internet of things device, such as a television.
The memory 20 may be used to store software programs as well as various data. The memory 20 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function (such as calculating a rotor bending value from the sine wave signal), and the like; the storage data area may include a database, and the storage data area may store data or information created according to use of the system, or the like. Further, the memory 20 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 30, which is a control center of the turbo generator, connects various parts of the entire turbo generator by using various interfaces and lines, and performs various functions of the turbo generator and processes data by operating or executing software programs and/or modules stored in the memory 20 and calling data stored in the memory 20, thereby integrally monitoring the turbo generator. Processor 30 may include one or more processing units; alternatively, the processor 30 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 30.
Although not shown in fig. 6, the turbine generator may further include a circuit control module, which is used for connecting with a power supply to ensure the normal operation of other components. Those skilled in the art will appreciate that the turbine generator configuration shown in FIG. 6 does not constitute a limitation of a turbine generator, and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
The invention also proposes a computer-readable storage medium on which a computer program is stored. The computer-readable storage medium may be the Memory 20 in the steam turbine generator shown in fig. 6, and may also be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, where the computer-readable storage medium includes instructions for enabling a terminal device (which may be a television, an automobile, a mobile phone, a computer, a server, a terminal, or a network device) having a processor to execute the method according to the embodiments of the present invention.
In the present invention, the terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the embodiment of the present invention has been shown and described, the scope of the present invention is not limited thereto, it should be understood that the above embodiment is illustrative and not to be construed as limiting the present invention, and that those skilled in the art can make changes, modifications and substitutions to the above embodiment within the scope of the present invention, and that these changes, modifications and substitutions should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The method for measuring the bending value of the rotor of the steam turbine generator unit is characterized in that the steam turbine generator unit comprises a phase discrimination sensor and a shaft vibration sensor arranged at each section of the rotor, and the method comprises the following steps:
acquiring the rotation period of the rotor measured by the phase discrimination sensor, and acquiring an eddy current sensor signal measured by a shaft vibration sensor;
carrying out Fourier transform on the signal of the eddy current sensor in the rotation period to obtain a sine wave signal synchronous with the rotation period;
and calculating a rotor bending value through the sine wave signal.
2. The method for measuring the bending value of the rotor of the steam turbine generator unit as claimed in claim 1, wherein the rotor is provided with a groove formed along an axial direction, and the step of measuring the rotation period of the rotor by the phase discrimination sensor comprises the steps of:
when the groove is detected to pass through a phase discrimination sensor, a corresponding pulse signal is obtained through the phase discrimination sensor;
the rotation period of the rotor is obtained by calculating the interval of two consecutive pulse signals.
3. The method for measuring the bending value of the rotor of the steam turbine generator unit as claimed in claim 1, wherein a reflective band is disposed on the rotor in an axial direction, and the step of measuring the rotation period of the rotor by the phase detection sensor includes:
when the reflective tape is detected to pass through the phase discrimination sensor, a corresponding pulse signal is obtained through the phase discrimination sensor;
the rotation period of the rotor is obtained by calculating the interval of two consecutive pulse signals.
4. The method for measuring the bending value of the rotor of the steam turbine generator unit according to the claims 1 to 3, wherein the step of acquiring the eddy current sensor signal measured by the shaft vibration sensor comprises the steps of:
an eddy current sensor signal based on a distance between the rotor surface and the shaft vibration sensor is output by the shaft vibration sensor.
5. The method for measuring the bending value of the rotor of the steam turbine generator unit as claimed in claim 1, wherein the step of performing fourier transform on the eddy current sensor signal in the rotation period to obtain a sine wave signal synchronized with the rotation period comprises:
the signal of the eddy current sensor is subjected to Fourier transform of the rotation period to obtain a model of
The sine wave signal of (1); wherein t represents time, x (t) represents the shaft vibration signal, and x
0Is a constant, n is an integer, 2 pi is a constant, A
nRepresenting a single peak of each sine wave signal, T representing the rotor rotation period measured by the phase discrimination sensor, phi
nPhase angle information of each sine wave signal is represented.
6. The method for measuring the bending value of the rotor of the steam turbine generator unit according to claim 5, wherein the step of calculating the bending value of the rotor by the sine wave signal comprises the steps of:
acquiring a voltage value of the sine wave signal synchronous with the rotation period of the rotor;
and calculating a rotor bending value according to the voltage value of the sine wave signal.
7. The method for measuring the bending value of the rotor of the steam turbine generator unit according to claim 6, wherein the step of calculating the bending value of the rotor according to the voltage value of the sine wave signal comprises the steps of:
and converting the voltage value of the sine wave signal into a rotor bending value according to the sensitivity of the shaft vibration sensor.
8. A steam turbine generator, characterized in that the steam turbine generator comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program realizing the following steps when executed by the processor:
acquiring the rotation period of the rotor measured by the phase discrimination sensor, and acquiring an eddy current sensor signal measured by a shaft vibration sensor;
carrying out Fourier transform on the signal of the eddy current sensor in the rotation period to obtain a sine wave signal synchronous with the rotation period;
and calculating a rotor bending value through the sine wave signal.
9. The turbine generator of claim 8, wherein the computer program when executed by the processor further performs the steps of:
when the groove is detected to pass through a phase discrimination sensor, a corresponding pulse signal is obtained through the phase discrimination sensor;
the rotation period of the rotor is obtained by calculating the interval of two consecutive pulse signals.
10. A computer-readable storage medium, characterized in that it has stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for measuring bending values of a rotor of a turbo generator set according to any one of claims 1 to 7.
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| CN113279822A (en) * | 2021-05-18 | 2021-08-20 | 西安热工研究院有限公司 | Device and method for measuring key phase signal of steam turbine generator unit |
| CN114252145A (en) * | 2020-09-25 | 2022-03-29 | 上海电气电站设备有限公司 | Axial vibration on-line testing system and method for steam turbine generator unit |
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