CN113202575B - Rotor axial vibration protection method of steam turbine unit - Google Patents
Rotor axial vibration protection method of steam turbine unit Download PDFInfo
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- CN113202575B CN113202575B CN202110402380.1A CN202110402380A CN113202575B CN 113202575 B CN113202575 B CN 113202575B CN 202110402380 A CN202110402380 A CN 202110402380A CN 113202575 B CN113202575 B CN 113202575B
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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
- F01D25/04—Antivibration arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a rotor axial vibration protection method of a turbine unit, which comprises the following steps: acquiring three axial vibration source signals of a rotor rotating shaft; converting the three axial vibration source signals into corresponding three axial actual dynamic displacements, namely vibration signals, and outputting the vibration signals; converting the three axial actual displacement signals into 3 paths of analog quantity signals, transmitting the 3 paths of analog quantity signals to a DCS (distributed control system), converting each path of the 3 paths of analog quantity signals into a first signal and a second signal, taking the intermediate value of the signal values of the 3 first signals to judge, confirming that the intermediate value exceeds a preset rotor axial vibration protection value, and sending out a first accident shutdown signal; three axial actual displacement signals are converted into 3 paths of digital quantity signals and are transmitted to a DCS (distributed control system), 3 paths of digital quantity signals are converted into 3 paths of third signals and are output, any two paths of third signals are taken for judgment, it is confirmed that any 2 paths of third signals in the 3 paths of third signals exceed a preset rotor axial vibration protection value, and a second accident shutdown signal for axial vibration protection is sent out.
Description
Technical Field
The embodiment of the invention relates to the field of industrial equipment control engineering, in particular to a rotor axial vibration protection method of a turbine unit.
Background
The measurement of the rotor vibration parameters of the large-scale rotating mechanical equipment is suitable for the application in the field of online monitoring and protection engineering of turbogenerators, hydraulic generators, industrial turbines, small turbines for driving high-speed or large water pumps and fans, and the like.
The size of the vibration parameter of the turbine unit is one of the extremely important parameters describing the running state of the turbine unit, and the method has extremely important significance in comprehensively measuring and monitoring the vibration information of the turbine unit, when the vibration of the turbine is abnormal, a TSI (turbine monitoring and protecting instrument) system sends out a prompt alarm signal to remind an operator to pay attention, and when the vibration of the turbine unit is severely abnormal, the protecting system automatically stops the running of the turbine unit, so that personal equipment injury and even catastrophic accidents are avoided. A large number of facts prove that the measurement and monitoring of the vibration of the steam turbine generator unit directly determine the safe and stable operation of the unit.
The current large-scale turbine sets are designed and provided with a sensor for measuring radial vibration of a rotor, namely, an eddy current type displacement sensor which is arranged on a bearing seat or a casing bracket and is perpendicular to the central line of a rotating shaft, and can be conveniently arranged at proper positions on the bearing seat and the casing bracket, so the sensor is widely applied, and the current situations that the current sealing conditions of various parameters of the current turbine are considered, proper sensor installation positions (spaces) are difficult to select, and the like are considered, and the measurement of axial vibration of the rotor, namely, a vibration measurement method parallel to the central line direction of the rotating shaft is often ignored by turbine sets, so that the current measurement method of axial vibration of the rotor of the turbine set is not paid enough attention to in the industry.
Disclosure of Invention
Therefore, the embodiment of the invention provides a rotor axial vibration protection method of a turbine unit, which aims to solve the problem that the detection and protection of the rotor axial vibration of the turbine unit are lacking in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
in one aspect of an embodiment of the present invention, there is provided a rotor axial vibration protection method of a turbine set, including: step 1: three axial vibration source signals of the rotor rotating shaft are obtained; step 2: converting the three axial vibration source signals into corresponding three axial actual dynamic displacements, namely vibration signals, and outputting the vibration signals; step 3: converting the three axial actual dynamic displacements, namely vibration signals, into 3 paths of analog quantity signals, transmitting the 3 paths of analog quantity signals to a DCS (distributed control system), converting each path of analog quantity signals into a first signal and a second signal, taking the intermediate values of the signal values of the 3 first signals to judge, and sending out a first accident shutdown signal when the intermediate values are confirmed to exceed a preset rotor axial vibration protection value.
Further, step 3 further includes: and 3 second signal values are sent to display equipment for displaying the axial vibration value of the rotor of the turbine unit.
Further, the rotor axial vibration protection method of the turbine unit further comprises the following steps: step 4: and converting the three axial actual dynamic displacement, namely vibration signals, into 3 paths of digital quantity signals, transmitting the 3 paths of digital quantity signals to a DCS (distributed control system), converting the 3 paths of digital quantity signals into 3 paths of third signals, outputting the 3 paths of third signals, taking any two paths of the third signals for judgment, and sending out an axial vibration protection second accident shutdown signal when any 2 paths of the third signals in the 3 paths of third signals exceed a preset rotor axial vibration protection value.
The rotor axial vibration protection method of the turbine unit further comprises the following steps: step 5: and after receiving the first accident shutdown signal and/or the second accident shutdown signal, controlling the steam turbine unit to stop running.
Further, the step 1 specifically comprises the following steps: acquiring an axial vibration source signal of a corresponding rotating shaft of the rotor through a sensor group; the sensor group includes at least three axial displacement measurement sensors.
Further, the three axial displacement sensors are used for acquiring the axial vibration source signals of the rotating shaft; the three axial displacement sensors are respectively arranged on a bracket fixed on the equipment shell of the turbine unit, and the bracket is fixedly arranged relative to the shell.
Further, the step 2 specifically comprises: the three axial vibration source signals acquired by the three axial displacement sensors are respectively sent to three corresponding preamplifiers; the three axial displacement signal processing clamping pieces and the corresponding channels are connected through the three preamplifiers; and the three vibration signal processing clamping pieces convert the three axial vibration source signals into three axial actual vibration signals to be output.
Embodiments of the present invention have the following advantages:
by applying the rotor axial vibration protection method of the turbine unit, the defect of the function of the measuring and protecting system, which is caused by the defect of the axial vibration measuring and protecting method, of the turbine unit can be avoided to the greatest extent. The method is simple and low in cost, and can realize the axial vibration measurement and protection functions of the turbine unit without spending much cost basically if the conventional TSI and DCS systems are provided with corresponding spare clamping pieces or spare channels, and meanwhile, the important measurement parameters of the axial vibration of the turbine unit are realized, so that important information is provided for the fault analysis diagnosis and treatment of the turbine generator unit, an important means is provided for the state evaluation and maintenance decision of the turbine generator unit, and the method has great industrial popularization and implementation prospects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
FIG. 1 is a schematic flow chart of a method for protecting rotor axial vibration of a turbine unit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a rotor shaft displacement detection system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a rotor axial vibration protection system according to an embodiment of the present invention.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms such as "upper", "lower", "left", "right", "middle" and the like are also used in the present specification for convenience of description, but are not intended to limit the scope of the present invention, and the changes or modifications of the relative relationship thereof are considered to be within the scope of the present invention without substantial modification of the technical content.
Examples
Referring to a schematic flow chart of a rotor axial vibration protection method of a turbine unit shown in fig. 1, an embodiment of the present invention provides a rotor axial vibration protection method of a turbine unit, which includes the steps of 1: three axial vibration source signals of the rotor shaft are obtained. Specifically, the axial vibration source signals of the rotating shaft are obtained through three axial displacement sensors.
The rotor axial vibration protection method of the turbine unit further comprises the following step 2: and converting the three axial vibration source signals into corresponding three axial actual dynamic displacements, namely vibration signals, and outputting.
The rotor axial vibration protection method of the turbine unit further comprises the following step 3: converting three axial actual dynamic displacement, namely vibration signals, into 3 paths of analog quantity signals, transmitting the 3 paths of analog quantity signals to a DCS (distributed control system), converting each path of analog quantity signals into a first signal and a second signal, taking the intermediate value of the signal values of the 3 first signals to judge, and sending out a first accident shutdown signal when the intermediate value exceeds a preset rotor axial vibration protection value.
As shown in fig. 3, step 3 in the method for protecting the axial vibration of the rotor of the turbine unit further includes: and 3 second signal values are sent to a display device for displaying the axial vibration value of the rotor of the turbine unit.
The rotor axial vibration protection method of the turbine unit shown in fig. 3 further comprises the step 4 of converting three axial actual displacement signals into 3 paths of digital quantity signals, transmitting the 3 paths of digital quantity signals to the DCS distributed control system, converting the 3 paths of digital quantity signals into 3 paths of third signals, outputting the 3 paths of third signals, taking any two paths of the third signals for judgment, and sending out an axial vibration protection second accident shutdown signal when any 2 paths of the third signals in the 3 paths of third signals are confirmed to exceed a preset rotor axial vibration protection value.
As shown in fig. 3, the rotor axial vibration protection method of the turbine unit further includes: step 5: and after receiving the first accident stop signal and/or the second accident stop signal, controlling the turbine unit to stop running.
As shown in fig. 2, in the method for protecting the axial vibration of the rotor of the turbine unit, step 1 specifically includes: and acquiring an axial vibration source signal of a corresponding rotating shaft of the rotor through a sensor group, wherein the sensor group comprises at least three axial displacement measuring sensors.
As shown in fig. 2, in the rotor axial vibration protection method of the turbine unit, the rotating shaft axial vibration source signal is obtained through three axial displacement sensors. Wherein, three axial displacement sensors are respectively installed on the support of the equipment casing of fixing on the turbine unit, and the support is fixed to the casing relatively. Specifically, an axial displacement sensor is fixed on the bracket, a shaft displacement detection disc which rotates along with the rotating shaft is fixed on the rotating shaft of the rotor, and the axial displacement sensor realizes acquisition of a rotating shaft axial vibration source signal by measuring the relative position between the axial displacement sensor and the detection disc.
As shown in fig. 2, in the method for protecting the axial vibration of the rotor of the turbine unit, step 2 specifically includes: three axial vibration source signals acquired by the three axial displacement sensors are respectively sent to the corresponding three preamplifiers; the corresponding three axial displacement signal processing clamping pieces and the corresponding channels are connected through the three prepositions; and converting the three axial vibration source signals into three axial actual displacement signals and outputting the three axial actual displacement signals. Specifically, the three axial displacement sensors are respectively arranged on a bracket fixed on the turbine equipment shell and not rotating along with the rotor, and the three axial displacement sensors respectively send the acquired three axial vibration source signals to the respective front-end processor, then the three axial vibration source signals are led to the respective axial displacement signal processing clamping piece and the corresponding channel, and then the signals are processed and converted into three axial actual displacement signals.
As shown in fig. 3, step 3 specifically includes: converting three axial actual dynamic displacement signals, namely vibration signals, into 3 paths of analog quantity signals, transmitting the 3 paths of analog quantity signals to corresponding special analog quantity signal receiving AI cards or existing standby channels in a DCS (distributed control system), dividing each path of the 3 paths of axial vibration signals into 6 paths in total through signal conversion in the DCS distributed control system, wherein 3 paths (second signals) are used for displaying the axial vibration values of the rotor of the steam turbine unit; the other 3 paths (first signals) select a judging mode of the intermediate value of three values in the DCS distributed control system, namely, the intermediate value of the signal values of the 3 first signals is taken for judging, and when the intermediate value is confirmed to exceed a preset rotor axial vibration protection value, a first accident shutdown signal is sent out.
As shown in fig. 3, step 4 specifically includes: and 3 paths (third signals) of digital quantity signals representing the axial vibration protection values, which are respectively output by the 3 axial vibration measurement clamping pieces or the standby channels, are sent to a special digital signal receiving DI card or an existing standby channel in a factory DCS (distributed control system), and a judgment mode that the digital quantity is three or two is formed by logic configuration in the DCS distributed control system, namely, when any 2 paths of the 3 paths of signals meet the protection action values, a second accident shutdown signal is sent.
As shown in fig. 3, in order to realize the functions of step 3 and step 4 at the same time, namely, when the intermediate value is confirmed to exceed the preset rotor axial vibration protection value or when any 2 paths of third signals in the 3 paths of third signals are confirmed to exceed the preset rotor axial vibration protection value, an accident alarm signal is sent to the ETS accident tripping circuit. To implement this combination of decisions, the logical decision relationship of the two or may be implemented in a DCS decentralized control system.
According to the technical scheme of the invention, the extremely redundant and reliable protection function of the axial vibration of the rotor of the steam turbine unit is realized, the protection function cannot be damaged even if one step of function fails in the step 3 and the step 4, and meanwhile, the possibility of misoperation of protection is prevented to the greatest extent through the integral implementation of the technical scheme of the invention.
While the invention has been described in detail in the general context and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (4)
1. A method of protecting a turbine unit from rotor axial vibration, comprising:
step 1: three axial vibration source signals of the rotor rotating shaft are obtained;
step 2: converting the three axial vibration source signals into corresponding three axial actual dynamic displacements, namely vibration signals, and outputting the vibration signals;
step 3: converting the three axial actual dynamic displacements, namely vibration signals, into 3 paths of analog quantity signals, transmitting the 3 paths of analog quantity signals to a DCS (distributed control system), converting each path of analog quantity signals into a first signal and a second signal, taking the intermediate values of the signal values of the 3 first signals to judge, and sending out a first accident shutdown signal when the intermediate values are confirmed to exceed a preset rotor axial vibration protection value;
step 3 further comprises:
transmitting 3 second signal values to display equipment for displaying the axial vibration value of the rotor of the turbine unit;
further comprises:
step 4: converting the three axial actual dynamic displacement, namely vibration signals, into 3 paths of digital quantity signals, transmitting the 3 paths of digital quantity signals to a DCS (distributed control system), converting the 3 paths of digital quantity signals into 3 paths of third signals, outputting the 3 paths of third signals, taking any two paths of the third signals for judgment, and sending out an axial vibration protection second accident shutdown signal when any 2 paths of the third signals in the 3 paths of third signals exceed a preset rotor axial vibration protection value;
further comprises:
step 5: after receiving the first accident shutdown signal and/or the second accident shutdown signal, controlling the steam turbine unit to stop running;
and when the intermediate value is confirmed to exceed a preset rotor axial vibration protection value or any 2 paths of third signals in the 3 paths of third signals are confirmed to exceed the preset rotor axial vibration protection value, an accident alarm signal is sent to the ETS accident tripping circuit.
2. The method for protecting rotor axial vibration of a turbine unit according to claim 1, wherein step 1 specifically comprises:
acquiring an axial vibration source signal of a corresponding rotating shaft of the rotor through a sensor group;
the sensor group includes at least three axial displacement measurement sensors.
3. A method for protecting rotor axial vibration of a turbo unit according to claim 2,
acquiring the axial vibration source signals of the rotating shaft through the three axial displacement measuring sensors;
the three axial displacement measuring sensors are respectively arranged on a bracket fixed on the equipment shell of the turbine unit, and the bracket is fixedly arranged relative to the shell.
4. A method for protecting rotor axial vibration of a turbo unit according to claim 3, wherein step 2 is specifically:
the three axial vibration source signals acquired by the three axial displacement measuring sensors are respectively sent to three corresponding preamplifiers;
the three axial displacement signal processing clamping pieces and the corresponding channels are connected through the three preamplifiers;
the three axial vibration signals are obtained from the buffer signal output of the three axial displacement signal processing clamping pieces and sent to the three vibration signal processing clamping pieces and corresponding channels;
the three vibration signal processing clamping pieces convert the three axial vibration source signals into the three axial actual dynamic displacements, namely vibration signals, and output the vibration signals.
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| CN202110402380.1A CN113202575B (en) | 2021-04-14 | 2021-04-14 | Rotor axial vibration protection method of steam turbine unit |
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| CN202110402380.1A CN113202575B (en) | 2021-04-14 | 2021-04-14 | Rotor axial vibration protection method of steam turbine unit |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806303A (en) * | 2015-04-13 | 2015-07-29 | 吉林省电力科学研究院有限公司 | Vibration protection method for steam turbine generator unit |
| CN109404066A (en) * | 2018-12-05 | 2019-03-01 | 华能国际电力股份有限公司大连电厂 | A kind of novel steam generating set monitoring and protection TSI system and its innovation optimization method |
| CN111894684A (en) * | 2020-06-17 | 2020-11-06 | 天津国电津能滨海热电有限公司 | Steam turbine shaft vibration protection optimization system and optimization method |
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- 2021-04-14 CN CN202110402380.1A patent/CN113202575B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806303A (en) * | 2015-04-13 | 2015-07-29 | 吉林省电力科学研究院有限公司 | Vibration protection method for steam turbine generator unit |
| CN109404066A (en) * | 2018-12-05 | 2019-03-01 | 华能国际电力股份有限公司大连电厂 | A kind of novel steam generating set monitoring and protection TSI system and its innovation optimization method |
| CN111894684A (en) * | 2020-06-17 | 2020-11-06 | 天津国电津能滨海热电有限公司 | Steam turbine shaft vibration protection optimization system and optimization method |
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