CN110285045A - A kind of nuclear power plant RCP main pump vibration phase monitoring system and method - Google Patents
A kind of nuclear power plant RCP main pump vibration phase monitoring system and method Download PDFInfo
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- CN110285045A CN110285045A CN201910574643.XA CN201910574643A CN110285045A CN 110285045 A CN110285045 A CN 110285045A CN 201910574643 A CN201910574643 A CN 201910574643A CN 110285045 A CN110285045 A CN 110285045A
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- signal
- key
- vibration
- phase
- main pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Abstract
A kind of nuclear power plant RCP main pump vibration phase monitoring system and method, the system comprises: vibration probe: for acquiring the vibration signal on measured axis；Vibration frame: for handling the vibration signal of vibration probe acquisition；Spare rotational speed probe is used for acquisition pulse signal, the pulse signal that the pulse signal generates when being measured axis per revolution；Signal converting case: for shunting the pulse signal generated from spare rotational speed probe, the key phase module being transferred in tach signal processing unit and key signal processing cabinet respectively；Key signal handles cabinet, hand-held dynamic balance measuring instrument.The present invention does not need installation temporal phase and pops one's head in, and can substantially reduce main pump start-stop time and dynamic balancing window time, reduces to occupy and shuts down overhaul critical path, while decreasing the dose of radiation that staff should bear by increase temporal phase probe.
Description
Technical field
The invention belongs to field of measuring technique, and in particular to a kind of nuclear power plant RCP main pump vibration phase monitoring system and side
Method.
Background technique
Since nuclear power plant's RCP main pump is run under conditions of high temperature, high pressure and high radiation, and without standby during Power operation
With, can not stop transport, it is serious former that the vibrated conference of main pump generates mechanical fatigue destructions, shafting crackle, sound friction, seal failure etc.
Barrier, and vibration monitoring is the important means for judging main pump health status.
The vibrational state for nuclear power plant's monitoring main pump that part is built up in early days at present is divided into on-line monitoring and off-line monitoring.Monitoring
Mode is as shown in Figure 1:
On-line monitoring: three main pumps are independently equipped with 4 on-line sensors, and (2 bear vibration sensors, 2 shaft vibrations pass
Sensor), sensor signal is sent to the display of main control room recorder after simulation plate processing and vibrates numerical value.
Off-line monitoring 1: during Power operation, containment is in close state unit, the portable number of vibration engineering teacher
The original analog of vibration is periodically acquired from electrical cabinet Buffer output terminal according to collector.Measurement data is played back to data
In library, measurement report is printed using special-purpose software, accident analysis Utility Engineers' special-purpose software divides spectrogram and tendency chart
Analysis, and the main pump thermal parameter shown in conjunction with main control room assesses the working condition of the pump, predicts that it vibrates development trend.
Off-line monitoring 2: during shutting down overhaul dynamic balance running, by installing interim vibration, phase probe In situ Measurement vibration additional
Dynamic frequency, amplitude and phase.
Following problems are primarily present under present mode:
1, during Power operation, no phase monitor can not carry out comprehensive real-time monitoring, abnormal conditions to main pump vibrational state
Under lack on-line analysis diagnosis basis；
2, it when overhaul dynamic balance running, needs to install additional temporal phase probe, increases main pump start-stop time and dynamic balancing window
Time occupies and shuts down overhaul critical path, and increasing temporal phase probe can make personnel bear certain dose of radiation.
In summary it discusses, it is known that it is simple in current portions nuclear power plant RCP main pump vibration monitor system structure, do not consider to lead
During pumping vibration phase monitoring function, especially Power operation, phase can not be monitored on-line.
Summary of the invention
The object of the present invention is to provide a kind of nuclear power plant RCP main pump vibration phases to monitor system and method, to solve existing
Technology is during Power operation, the technical issues of can not monitoring phase on-line；And the prior art is solved in equipment operation irregularity feelings
The problem of lacking on-line analysis diagnosis basis under condition.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of nuclear power plant RCP main pump vibration phase monitoring system, which is characterized in that the system comprises:
Vibration probe: being electrically connected with vibration frame, for acquiring the vibration signal on measured axis；
Vibration frame: being electrically connected with hand-held dynamic balance measuring instrument, for handling the vibration signal of vibration probe acquisition；
Spare rotational speed probe: being electrically connected with signal converting case, is used for acquisition pulse signal, and the pulse signal is measured axis
The pulse signal generated when per revolution；
Signal converting case: it is electrically connected with spare rotational speed probe and key signal processing cabinet, comes from spare turn for shunting
The pulse signal of speed probe acquisition, and the key Xiang Mo being transferred in tach signal processing unit and key signal processing cabinet respectively
Block；
Tach signal processing unit: being electrically connected with signal converting case, for handle simultaneously structure to received pulse signal
At tachometric survey channel；
Key signal handles cabinet: for accommodating key phase module and vibration frame；
Hand-held dynamic balance measuring instrument: with key signal processing cabinet in key phase module and vibration frame be electrically connected, use
In acquiring and show pulsed key signal and vibration signal, and phase letter is relatively determined according to key signal and vibration signal
Number, the phase signal is a pulse period starting point in the pulsed key signal to one in the vibration signal
The phase angle of positive peak dot；
It is further preferred that the key phase module includes an input port BNC and two output ports BNC.
Further, the spare rotational speed probe is reluctive transducer, output signal about 1~2V.
Further, the key signal processing cabinet includes key phase module, and key phase module has the defeated entry/exit port of BNC,
It is communicated by the port BNC and signal converting case, downstream hand-held dynamic balance measuring instrument.
Further, the key phase module receives the voltage signal from spare rotational speed probe, through filtering, shaping, amplification
Transistor-Transistor Logic level is exported after processing.
Further, the key phase module is shown in the form of LED light using succinct, friendly human-computer interaction interface
Show that plate information, the LED light include power supply indicator, run indicator and output indicator.
Further, the system also includes keys mutually to mark, be the measured axis on newly-increased convex key or existing convex key,
For generating the pulse signal with the spare rotational speed probe cooperation.
In addition, the existing convex key is the target needle on measured axis.
It is further preferred that further including the tach signal processing unit being electrically connected with signal converting case, the spare revolving speed is visited
Head, signal converting case and the tach signal processing unit form tachometric survey channel；The spare rotational speed probe, signal converting
Case, the key phase module in key signal processing cabinet and hand-held dynamic balance measuring instrument form phase measurement channel.
A kind of nuclear power plant RCP main pump vibration phase monitoring method, which is characterized in that the described method includes:
Obtain the vibration signal of measured axis；
Obtain the pulse signal of the measured axis, the arteries and veins that the pulse signal generates when being the measured axis per revolution
Signal is rushed, is further processed and is converted to pulsed key signal；
According to the vibration signal of acquisition and the pulsed key signal, the phase letter of the measured axis is calculated
Number, the phase signal is a pulse period starting point in the pulsed key signal to one in the vibration signal
The corner of positive peak dot.
Implement the present invention can achieve it is following the utility model has the advantages that
The present invention still can carry out comprehensive real-time monitoring, energy to vibrational state to phase monitor during Power operation
It is enough to provide on-line analysis diagnosis basis in main pump operation irregularity situation for maintenance；
The present invention does not need to install temporal phase probe additional, can substantially reduce main pump start-stop time and dynamic balancing window time,
It reduces to occupy and shuts down overhaul critical path, while decreasing the radiation agent that staff should bear because increasing temporal phase probe
Amount.
Detailed description of the invention
Fig. 1 is main pump vibrational state prior art monitoring mode of the present invention；
Fig. 2 is fundamental vibration phase measurement principle schematic diagram of the present invention；
Fig. 3 is the structural block diagram that a kind of nuclear power plant RCP main pump vibration phase of the present invention monitors system embodiment one；
Fig. 4 is the structural block diagram that a kind of nuclear power plant RCP main pump vibration phase of the present invention monitors system embodiment two.
Fig. 5 is a kind of flow chart of nuclear power plant RCP main pump vibration phase monitoring method of the present invention.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.Obviously, described embodiments are only a part of the embodiments of the present invention, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment one
A kind of nuclear power plant RCP main pump vibration phase monitoring system, as shown in figure 3, system includes:
Vibration probe 1: being electrically connected with vibration frame, for acquiring the vibration signal on measured axis；
Vibration frame 2: being electrically connected with hand-held dynamic balance measuring instrument, for handling the vibration signal of vibration probe acquisition；
Spare rotational speed probe 3: being electrically connected with signal converting case, is used for acquisition pulse signal, the pulse signal is tested
The pulse signal generated when axis per revolution；
Signal converting case 4: it is electrically connected with the key phase module in spare rotational speed probe and key signal processing cabinet, for dividing
The pulse signal acquired from spare rotational speed probe is flowed, and is transferred to tach signal processing unit and key signal processor respectively
Key phase module in cabinet；
Key phase module 5: being electrically connected with signal converting case and data collection station, to received pulse signal
Hand-held dynamic balance measuring instrument is transmitted to after reason；
Key signal handles cabinet 6: for accommodating key phase module and vibration frame；
Hand-held dynamic balance measuring instrument 7: being electrically connected with key phase module and vibration frame, for acquiring and showing pulsed key
Phase signals and vibration signal, and determining phase signal, the phase letter are compared according to pulsed key signal and vibration signal
Number for a pulse period starting point in the pulse signal to the phase angle of a positive peak dot in the vibration signal；
Key phase module includes an input port BNC and two output ports BNC, and spare rotational speed probe is reluctance type sensing
Device, output signal about 1~2V, and off-gauge square wave need to export as pulsed key signal after treatment.It visits
Head rear end handles non-standard square-wave signal by key phase module.
Embodiment two
A kind of nuclear power plant RCP main pump vibration phase monitoring system, as shown in Figure 1, system includes:
Vibration probe 1: being electrically connected with vibration frame, for acquiring the vibration signal on measured axis；
Vibration frame 2: being electrically connected with hand-held dynamic balance measuring instrument, for handling the vibration signal of vibration probe acquisition；
Spare rotational speed probe 3: being electrically connected with signal converting case, is used for acquisition pulse signal, the pulse signal is tested
The pulse signal generated when axis per revolution；
Signal converting case 4: being electrically connected with spare rotational speed probe and key signal processing cabinet, tach signal processing unit,
For shunting the pulse signal from the acquisition of spare rotational speed probe, and it is transferred to tach signal processing unit and key signal respectively
Handle the key phase module in cabinet；
Key phase module 5: being electrically connected with signal converting case and hand-held dynamic balance measuring instrument, for received pulse signal
Hand-held dynamic balance measuring instrument is transmitted to after being handled；
Key signal handles cabinet 6: for accommodating key phase module and vibration frame；
Hand-held dynamic balance measuring instrument 7: acquiring and show that treated pulsed key signal and vibration signal, and according to
The two compares determining phase signal, and the phase signal is that a pulse period starting point in the pulsed key signal arrives
The phase angle of a positive peak dot in the vibration signal；
Key signal processing cabinet includes key phase module, and key phase module has the defeated entry/exit port of BNC, by the port BNC with
Signal converting case, the communication of downstream hand-held dynamic balance measuring instrument；Key phase module receives the voltage signal from spare rotational speed probe,
Transistor-Transistor Logic level is exported after filtering, shaping, enhanced processing；Key phase module is referred to using succinct friendly human-computer interaction interface with LED
Show lamp form to show that plate information, LED light include power supply indicator, run indicator and output indicator；System is also
It is mutually marked including key, is the newly-increased convex key or existing convex key on the measured axis, for cooperating with the spare rotational speed probe
Generate the pulse signal；Existing convex key is the target needle on measured axis.
Embodiment three
A kind of nuclear power plant RCP main pump vibration phase monitoring system, as shown in figure 3, system includes:
Vibration probe 1: being electrically connected with vibration frame, for acquiring the vibration signal on measured axis；
Vibration frame 2: being electrically connected with hand-held dynamic balance measuring instrument, for handling the vibration signal of vibration probe acquisition；
Spare rotational speed probe 3: being electrically connected with signal converting case, is used for acquisition pulse signal, the pulse signal is tested
The pulse signal generated when axis per revolution；
Signal converting case 4: with the key phase in spare rotational speed probe, tach signal processing unit and key signal processing cabinet
Module electrical connection, for shunting the pulse signal from the acquisition of spare rotational speed probe, and it is single to be transferred to tach signal processing respectively
Key phase module in member and key signal processing cabinet；
Key phase module 5: being electrically connected with signal converting case and data collection station, to received pulse signal
Data collection station is transmitted to after reason；
Key signal handles cabinet 6: for accommodating key phase module and vibration frame；
Hand-held dynamic balance measuring instrument 7: determining phase is compared according to treated pulsed key signal and vibration signal
Position signal, the phase signal are a pulse period starting point in the pulsed key signal into the vibration signal
The phase angle of one positive peak dot；
It further include the tach signal processing unit 8 being electrically connected with signal converting case, the tach signal processing unit and letter
Number transfer box, spare rotational speed probe form tachometric survey channel；The spare rotational speed probe, signal converting case, key phase module and
Hand-held dynamic balance measuring instrument forms phase measurement channel.
The input port of signal converting case is connect by coaxial cable with spare rotational speed probe；Output port connects all the way to be turned
Fast signal processing unit, another way connecting key phase module.Under normal conditions, transfer box is maintained at spare rotational speed probe and revolving speed is believed
Number processing unit connection status, when needing to monitor phase, is connected to phase measurement for spare rotational speed probe by signal converting case
Channel.After phase measurement works, then probe restored to tachometric survey channel.It, will not be to fortune in the handoff procedure of channel
Tachometric survey in row interferes.
Present invention work basic principle is as follows:
A groove or convex key are arranged on measured axis mutually to identify as key, when groove or convex key go to probe positions, biography
Sensor generates a pulse signal.Axis every revolution will generate the pulse signal of a cycle, and pulse shows at the time of generation
Position of the axis in each period, the initial position which will mutually calculate as key.By pulse count, can measure
The revolving speed of axis；And calibration pulse signal is converted to and compared with the vibration signal of axis by the way that pulse signal is carried out processing, it can be with
The phase angle for determining vibration, for the dynamic balance analysis of axis and the accident analysis of equipment and diagnosis.Calculate pulse signal forward position
The angle of advanced vibration signal " high point ", " high point " is certain point on spindle, when the point goes to point position, vibrates positive benefit
In positive peak dot.The schematic diagram of fundamental vibration phase measurement is as shown in Fig. 2, key phase device, i.e., heretofore described spare rotational speed probe,
When alignment indentation or convex key, system be will test to a pulse signal.Assuming that " high point " in H point position, subsequent time works as H at this time
Point is corresponding when turning to below vibration probe to be the positive peak of vibration, then calculating the positive peak of pulse front edge to vibrational waveform
Angle be phase angle Φ.According to vibration probe position and phase angle, so that it may position any time high point position.
A kind of nuclear power plant RCP main pump vibration phase monitoring method, method include:
S1, the vibration signal for obtaining measured axis；
S2, the pulse signal for obtaining the measured axis, the pulse signal generate when being the measured axis per revolution
Pulse signal；
S3, the vibration signal and the pulse signal according to acquisition, are calculated the phase signal of the measured axis,
The phase signal is a pulse period starting point in the pulse signal to a positive peak dot in the vibration signal
Phase angle.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (10)
1. a kind of nuclear power plant RCP main pump vibration phase monitors system, which is characterized in that the system comprises:
Vibration probe: being electrically connected with vibration frame, for acquiring the vibration signal on measured axis；
Vibration frame: being electrically connected with data collection station, for handling the vibration signal of vibration probe acquisition；
Spare rotational speed probe: being electrically connected with signal converting case, is used for acquisition pulse signal, and the pulse signal is every turn of measured axis
The pulse signal generated when a dynamic circle；
Signal converting case: it is electrically connected with spare rotational speed probe and key signal processing cabinet, is visited for shunting from spare revolving speed
The pulse signal of head acquisition, and the key phase module being transferred in tach signal processing unit and key signal processing cabinet respectively；
Key phase module: being electrically connected with signal converting case and data collection station, for carrying out at shaping to received pulse signal
Standard Transistor-Transistor Logic level, i.e. pulsed key signal are managed into, hand-held dynamic balance measuring instrument is then transmit to；
Key signal handles cabinet: for accommodating key phase module and vibration frame；
Hand-held dynamic balance measuring instrument: it is electrically connected with key phase module, the vibration frame in key signal processing cabinet, for testing
And show pulsed key signal and vibration signal, and phase signal is relatively determined according to key signal and vibration signal, it is described
Phase signal is a pulse period starting point in the pulsed key signal to a positive peak dot in the vibration signal
Phase angle.
2. a kind of nuclear power plant RCP main pump vibration phase as described in claim 1 monitors system, which is characterized in that the signal
Transfer box includes an input port BNC and two output ports BNC.
3. a kind of nuclear power plant RCP main pump vibration phase as described in claim 1 monitors system, which is characterized in that described spare
Rotational speed probe is reluctive transducer, output signal about 1~2V.
4. a kind of nuclear power plant RCP main pump vibration phase as claimed in claim 3 monitors system, which is characterized in that the key phase
Signal processing cabinet includes key phase module, and key phase module has the defeated entry/exit port of BNC, by the port BNC and signal converting case,
The communication of downstream hand-held dynamic balance measuring instrument.
5. a kind of nuclear power plant RCP main pump vibration phase as claimed in claim 4 monitors system, which is characterized in that the key phase
Module receives the voltage signal from spare rotational speed probe, outputting standard Transistor-Transistor Logic level, i.e. arteries and veins after filtering, shaping, enhanced processing
Rush formula key signal.
6. a kind of nuclear power plant RCP main pump vibration phase as claimed in claim 3 monitors system, which is characterized in that the key phase
Module shows plate information, the LED light packet using succinct friendly human-computer interaction interface in the form of LED light
Include power supply indicator, run indicator and output indicator.
7. a kind of nuclear power plant RCP main pump vibration phase as claimed in claim 3 monitors system, which is characterized in that the system
Further include that key mutually marks, is newly-increased convex key or existing convex key on the measured axis, for matching with the spare rotational speed probe
It closes and generates the voltage pulse signal.
8. a kind of nuclear power plant RCP main pump vibration phase as claimed in claim 7 monitors system, which is characterized in that described existing
Convex key is the target needle on measured axis.
9. a kind of nuclear power plant RCP main pump vibration phase as described in claim 1 monitors system, which is characterized in that further include with
The tach signal processing unit of signal converting case electrical connection, the spare rotational speed probe and signal converting case, tach signal processing
Unit forms tachometric survey channel；The spare rotational speed probe, signal converting case, key signal processing cabinet and hand-held are dynamic flat
The tester that weighs forms phase measurement channel.
10. a kind of method of nuclear power plant RCP main pump vibration phase monitoring as claimed in any one of claims 1 to 9 wherein, feature
It is, which comprises
Obtain the vibration signal of measured axis；
Obtain the pulse signal of the measured axis, when pulsed key signal measured axis per revolution generates
Standard voltage pulses signal is further processed and is converted to pulsed key signal；
According to the vibration signal of acquisition and the pulsed key signal, the phase signal of the measured axis is calculated,
The phase signal be the pulsed key signal in a pulse period starting point to one in the vibration signal just
The phase angle of peak dot.
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| WO2023059263A1 (en) * | 2021-10-09 | 2023-04-13 | S.P.M. Instrument Ab | System and method for monitoring pump vibrations |
| WO2023059264A1 (en) * | 2021-10-09 | 2023-04-13 | S.P.M. Instrument Ab | System and method for pump control based on pump vibrations |
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