CN106438395A - Mining centrifugal pump on-line accelerated life test platform and test method thereof - Google Patents
Mining centrifugal pump on-line accelerated life test platform and test method thereof Download PDFInfo
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- CN106438395A CN106438395A CN201610922117.4A CN201610922117A CN106438395A CN 106438395 A CN106438395 A CN 106438395A CN 201610922117 A CN201610922117 A CN 201610922117A CN 106438395 A CN106438395 A CN 106438395A
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- centrifugal pump
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- water tank
- accelerated life
- pipeline
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
Abstract
The invention discloses a mining centrifugal pump on-line accelerated life test platform and a test method thereof. The mining centrifugal pump on-line accelerated life test platform is in a double-circulation measurement isolation pipeline structure, comprises a centrifugal pump accelerated life circulation pipeline and a centrifugal pump health performance measurement pipeline, and consists of a system structure combing a field monitoring and controlling system and a control computer remote monitoring system. With the adoption of the test method, a centrifugal pump accelerated life test accomplished automatically, and centrifugal pump characteristic curves are drawn remotely and centrifugal pump health life information is stored. Monitoring parameters are comprehensive, the structure is reasonable, full life cycle data of a centrifugal pump in a failure process can be monitored effectively, other components like a sensor and a pipeline are protected from being eroded, and the foundation for acquiring centrifugal pump accelerated life data is laid.
Description
Technical field
The present invention relates to a kind of online centrifugal pump test platform and its test method, especially a kind of for on-line measurement
Centrifugal pump accelerated life test platform and its test method.
Background technology
Centrifugal pump is a kind of rotating machinery being widely used in industrial circle draining, its electric power, mine, chemical industry,
Multiple industry such as agricultural all has consequence.Centrifugal pump in conveyance fluid medium, due to miscellaneous by granule in medium
The erosion of matter, its blade occurs a certain degree of abrasion, ultimately results in the inefficacy of centrifugal pump.Surprisingly lose to reduce centrifugal pump
Imitate the economic loss brought and potential safety hazard, need to set up centrifugal pump System under Predictive Maintenance.Realize the base of centrifugal pump State Maintenance
Plinth is to grasp its fault observer, understand characteristic parameter during its inefficacy, thus could be predicted and to assess it effective its out-of-service time
Residual life.But, fault data when current centrifugal pump lost efficacy is not comprehensive, and most centrifugal pump faults quickly grow, and work
Make that field apparatus monitoring parameter is less can not to react fault signature comprehensively；The artificial fault signature of laboratory is again not in full conformity with certainly
So fault progression rule, has different with actual centrifugal pump failure procedure, and artificial trouble point is more discrete, does not possess even
Continuous fault signature.At present in the urgent need to for centrifugal pump impeller wear-out failure, accelerating centrifugal pump life failure process, whole prison
Survey the multi-signals such as its flow, pressure, vibration and electric current, obtain its life-cycle fault message, for follow-up Characteristic Extraction and
The research of life-span management algorithm lays the foundation.
Content of the invention
It is an object of the invention to provide a kind of online accelerated life test platform of mining centrifugal pump and its test method, it is used for
Centrifugal pump inefficacy degradation, obtains centrifugal pump failure of removal heat transfer agent, is that fault diagnosis and the life appraisal of centrifugal pump carries
Support for data.
Realize the object of the invention technical scheme as follows.
A kind of online accelerated life test platform of mining centrifugal pump it is characterised in that：Described centrifugal pump accelerated life test
Platform is to be equipped with monitoring and controlling system by Two-way Cycle measurement isolation pipeline structure to constitute；
Described Two-way Cycle measurement isolation pipeline structure, including centrifugal pump, sand water tank, filtered water tank, malleation meter, depressimeter, effusion meter
And valve；Wherein：
Centrifugal pump is to connect, by valve III, the silt water extracting in sand water tank with sand water tank, and will through valve V4 and valve V5
Silt water is sent into sand water tank and is constituted accelerated aging circulation line；
Centrifugal pump is to connect, by valve V1, the clear water extracting in filtered water tank with filtered water tank, and through valve V2, effusion meter and valve
Clear water is sent into filtered water tank and is constituted measurement circulation line by door V5；
Malleation meter is installed on the outlet of centrifugal pump, and depressimeter is installed on the water inlet of centrifugal pump；Malleation meter, depressimeter and flow
When counting for accelerated aging platform loop clear water, measurement is centrifuged pump pressure and flow hydraulic parameters；
Described monitoring and controlling system, adopts including tachoscope, current transformer, voltage transformer, acceleration transducer, low-frequency data
Storage, high-frequency data harvester, field controller, display operator control panel and control computer；Wherein：
Low-frequency data harvester is connected with malleation meter, depressimeter, effusion meter and tachoscope, during collection centrifugal pump accelerated aging
Low-frequency data signal；High-frequency data harvester is connected with current transformer, voltage transformer and acceleration transducer, gather from
Electric current in heart pump running, voltage and vibration signal；Field controller is connected control centrifugation with valve V1 ~ V5 and centrifugal pump
The start and stop of pump and valve switch；Display operator control panel is with low-frequency data harvester, high-frequency data harvester and acceleration transducer even
Connect display gathered data and centrifugal pump and valve event situation；Control computer and low-frequency data harvester, high-frequency data collection
Device and acceleration transducer connect, and remotely show Working Conditions of Centrifugal Injection Pumps, realize remote monitoring, and store gathered data.
In technique scheme, further technical characteristic is as follows.
Described effusion meter is disposed on the floor level pipeline of matrix pipeline, and matrix pipeline is 5 times or 7 times
Direct piping.
The sand water constituent of described sand water tank is quartz sand, and quartz sand particle size is 2 ~ 4 mesh, and sand water mixing ratio is 1：2.
Described control computer is that Ethernet is connected with field controller data harvester, and displaying data in real-time collection is single
The sensing data of unit's transmission, and be stored in computer hard disc, remotely send operational order to field controller, execution is remote simultaneously
Journey operates.
Described field controller is one kind of PLC programming device, the instruction that executive button sends, and according to pipeline feelings
Condition, automatic switching-over pipeline, controlled valve, gather low-frequency sensor data simultaneously, control computer is uploaded to by Ethernet.
The core devices of described low-frequency data harvester and high-frequency data harvester are capture card or PLC has data acquisition
The device of ability, the sample frequency of high-frequency data harvester is at least 10kHz.
Described field controller includes centrifugal pump start-stop button, pipeline switching push button, the regulation rotation of general export's control valve opening
Button, measurement button and alarm buzzer；Wherein, measurement button is to be automatically brought into operation general export's control valve opening, and records real-time streams
Amount and pressure, and it is transferred to the real-time characteristic curve that control computer simulates centrifugal pump；Field controller is believed according to sensor
The breath current centrifugal pump of interpretation whether normal work, by buzzer warning.
A kind of test method for above-mentioned provided a kind of mining centrifugal pump online accelerated life test platform, described
It is sand water fluid-mixing in the sand water tank in accelerated life test circulation line in test method, for accelerating centrifugal pump to grind
Damage；The medium in filtered water tank in measurement circulation line is clear water, for measuring the hydraulic performance of centrifugal pump, when acceleration centrifugal pump
During the life-span, by Valve controlling, it flows in sand water tank self-loopa to make medium；When measuring performance of centrifugal pump, control valve, cut
Change pipeline, realize hydraulic performance test using the clear water in filtered water tank.
Wherein, in described test method when measure characteristic curve of centrifugal pump when, valve V1 and valve V2 opens, valve V3 and
Valve V4 closes；Accelerated life test platform operates on " measurement circulation line ", the clear water in circulation filtered water tank；By adjusting
The aperture of valve V5, measures a series of P2, P1 and Q, draws out the characteristic curve of centrifugal pump according to formula；
When carrying out to centrifugal pump accelerating to lose efficacy, valve V1 and valve V2 closes, and valve V3 and valve V4 opens；Accelerated aging tries
Test platform and operate on " accelerated life test circulation line ", the sand water fluid-mixing in recirculation system sand water tank, by sand water tank
The erosion to centrifugal pump for the water containing sand, accelerates the failure procedure of centrifugal pump.
Technique scheme of the present invention is compared with the prior art, and has such advantages as and good effect.
Present invention is primarily targeted at accelerating the failure procedure of centrifugal pump, record centrifugal pump each in failure procedure simultaneously
The characteristic curve in individual stage and work information, test platform of the prior art or device are mainly the initial characteristic to centrifugal pump
Curve is tested and is recorded, or the main hydraulic performance testing centrifugal pump, does not relate to centrifugal pump and accelerates to lose efficacy or add
Fast life search, the present invention both can test the initial characteristic curve of centrifugal pump, can accelerate the inefficacy of centrifugal pump simultaneously again
Journey, records its characteristic curve in different phase, thus obtaining the health data in centrifugal pump failure procedure.
The present invention adopts Two-way Cycle measurement isolation pipeline structure, accelerates pipeline separate with measurement pipeline, simultaneously and all
It is connected with centrifugal pump so that while accelerating centrifugal pump failure procedure, the characteristic curve of on-line measurement centrifugal pump and operating mode are believed
Breath, prevents from accelerating sand water that sensor is caused with erosion, is also prevented from water containing sand in effusion meter bend loss blocking pipeline simultaneously.
The present invention gathers comprehensive sensing data in process of the test, not only includes measurement characteristicses curve indispensability flow, just
Pressure, negative pressure and rotating speed, also include vibration data, voltage and current data, and wherein voltage and current is not only that it is effective for collection
Value, but gather the waveform of three-phase voltage and three-phase current, the quality of power supply of analysis centrifugal pump using high-speed collection card, store from
Heart pump in failure procedure, the delta data of the quality of power supply.
The present invention has field control, and manually the start and stop of control knob field control centrifugal pump, pipeline switching and
Valve opening etc. operates, and has man machine interface simultaneously, can show the current work information of centrifugal pump in real time on field controller,
Field controller sampling PLC, can be according to heat transfer agent used as main control unit, automatic switching-over pipeline, start and stop water pump, when appearance meaning
Buzzer warning can be passed through during outer situation.
The scheme that data acquisition unit of the present invention is combined with capture card using PLC, sensor signal is divided into low frequency signal
And high-frequency signal, using different element gathered datas it is ensured that the precision of gathered data, reduce the cost of data acquisition unit.
Field controller of the present invention is connected by Ethernet with control computer, in the data that data acquisition unit is gathered
Pass to control computer display storage, control computer can show centrifugation pump condition by Ethernet in real time it is possible to long-range
Operating operation test platform, it is not necessary to testing crew real-time monitoring centrifugal pump running status at the scene, is effectively improved trial pattern,
Reduce testing crew working strength, improve experiment work efficiency.
The sensor information that control computer of the present invention gathers back according to data acquisition unit, draws out characteristic curve, and
Simulate characteristic curve of centrifugal pump equation, and provide the confidence interval of characteristic curve equation, in prior art, majority can be drawn out
The characteristic curve equation of centrifugal pump, but the confidence interval of its data can not be given, the present invention can realize showing current centrifugation
The characteristic curve of pump and corresponding confidence interval, judge the reliability of current centrifugal pump floor data for testing crew.
Brief description
Fig. 1 is the present invention mining centrifugal pump accelerated life test flat structure schematic diagram.
Fig. 2 is centrifugal pump accelerated life test flow chart of the present invention.
In figure：1：Centrifugal pump；2：Sand water tank；3：Filtered water tank；4：Malleation meter；5：Depressimeter；6：Effusion meter；7：Tachoscope；
8：Current transformer；9：Voltage transformer；10：Acceleration transducer；11：Low-frequency data harvester；12：High-frequency data gathers
Device；13：Field controller；14：Display operator control panel；15：Control computer.
Valve V1；Valve V2；Valve V3；Valve V4；Control valve V5.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is explained in detail, the technical staff in described field is readding
After having read this specific embodiment, it is capable of technical solutions according to the invention, also can embody of the present invention excellent simultaneously
Point and good effect.
As shown in Figure 1, implement above-mentioned the provided a kind of online centrifugal pump accelerated life test platform of the present invention, be
The test pipeline portions of system adopt Two-way Cycle measurement isolation pipeline structure, including main line, accelerated aging management and measurement pipeline.
Accelerated aging pipeline is made up of sand water tank 2, sand tank entry valve V4, sand tank outlet valve V3；Measurement pipe route is clear
Water tank 3, filtered water tank inlet valve V2, filtered water tank outlet valve V1 and effusion meter composition；Main line is by centrifugal pump, malleation meter, depressimeter
Form with exporting total regulating valve.Accelerated aging pipeline is connected with the measurement uniform main line of pipeline, by different the following of valve transfer
Endless tube road.Sand water tank is built with 1：2 quartz sand and the blending agent of water, the no depression bending in its pipeline of accelerated aging pipeline
Pipeline, it is to avoid sand water blending agent deposition blocking pipeline.In measurement pipeline, effusion meter is located at pipeline depression section, respectively has 7 before and after it
Times with the straight tube of 5 times of pipe diameters it is ensured that effusion meter measurement accurately.In order to prevent effusion meter to be subject to water containing sand to be likely to result in
Abrasion, from contactless measuring pipe of electromagnetic flow meter road flow.
When measuring characteristic curve of centrifugal pump, valve V1, V2 open, and V3, V4 close.Accelerated life test platform operates in
Clear water on " measurement circulation line ", in circulation filtered water tank T1.By adjusting the aperture of V5, measure a series of P2, P1 and Q, root
Draw out characteristic curve of centrifugal pump according to equation below；
In formula,ρFor fluid density, kg/m3；h 0 For piezometer and depressimeter difference in height, m；P 2 、P 1 It is respectively the pressure of pump import and export
By force, Pa；u 2 、u 1 It is respectively the flow velocity of pump import and export, m/s；Because the two sections pipeline of centrifugal pump is very short, square of flow velocity difference very little,
Therefore it is negligible.
When carrying out to centrifugal pump accelerating to lose efficacy, valve V1, V2 close, and V3, V4 open, and accelerated life test platform runs
On " accelerated life test circulation line ", recirculation system sand water tank（2）Interior sand water fluid-mixing, by water containing sand pair in sand water tank
The erosion of centrifugal pump, accelerates centrifugal pump failure procedure.
By the method for Two-way Cycle measurement isolation so that the pipeline of each measurement and sensor situation keep constant, only
Centrifugal pump and accelerated wear test pipeline are worn, and ensure that precision, also prevent bend loss pipeline and exist, the pipeline causing
Blocking.
As shown in Figure 1, this centrifugal pump life-span accelerates platform to adopt two grade network structure, with PLC and high-speed collection card is
Core, field controller, man machine interface, piezometer, effusion meter, regulating valve and tachoscope are all connected with PLC, and PLC mainly realizes
The control of field controller, and the collection of the information of low-frequency sensor, capture card is passed with acceleration transducer, three-phase Hall voltage
Sensor is connected with three-phase Hall current sensor, and in present embodiment, PLC adopts SIEMENS S 7-200 PLC, and capture card is selected
The NI 9234 type high-speed collection card of NI company, PLC is connected with control computer by Ethernet with capture card, control computer
The real-time centrifugal pump health data of its upload can be stored, can remotely issue test platform operational order, this embodiment party simultaneously
In formula, with the LabVIEW of NI company as platform development, man machine interface and PLC pass through RS-485 serial ports even to control computer software
Connect, real-time live shows centrifugal pump current health situation, test platform monitoring and controlling system of the present invention configures according to above
Mainly complete following functions：
1）The low frequency large time delay signal such as pressure, flow can reliably be gathered, realize characteristic curve of centrifugal pump mapping；
2）Can taken at regular intervals vibration, the high-frequency signal such as electric current and voltage, meet sample frequency and require；
3）Automatically controlling of the operations such as achievable water pump automatic start-stop, valve opening control, pipeline switching, periodically controls phase automatically
Closing valve completes characteristic curve point-to-point measurement；
4）Possess the functions such as leakage warning, water pump jerk, realize on the spot sound and light alarm it is possible to remotely be reported by control computer
Alert；
5）It is capable of the curve of automatic Fitting gathered data, show the characteristic curve of centrifugal pump in real time；
6）Human-computer interaction interface is friendly, facilitates test operation, and is equipped with powerful database function, can store centrifugal pump and lose
Whole floor datas during effect；
As shown in Figure 2, above-mentioned a kind of the provided centrifugal pump accelerated life test platform test method of the present invention is as follows：
1）Measure centrifugal pump index of aging initial parameter, before carrying out centrifugal pump accelerated life test, should first measure healthy shape
Every index of aging of centrifugal pump under state, including：Characteristic curve of centrifugal pump, running speed, initial vibration frequency spectrum and power supply electric energy
Quality.
2）Set running-in wear time interval t, the present invention is online centrifugal pump accelerated life test platform, accelerate the longevity
Need to isolate sensor during life test, until accelerating certain time to test characteristic curve of centrifugal pump and life-span dependency number again
According to, so, accelerated aging time and test interval t should be set.
3）Set according to initial, carry out centrifugal pump accelerated life test, depending on the accelerated aging time is according to initial gap t.
4）Measure Impeller Mass, the abrasion of impeller is difficult to be weighed with volume and shape, so the present invention is provided using survey
Determine quality to judge damage in impeller degree.
5）After completing current damage in impeller degree, the test of its centrifugal pump health performance should be carried out, form current health data
Corresponding relation with damage in impeller.
6）According to the health data recording, judge whether current centrifugal pump reaches invalid principle, if centrifugal pump has reached
Invalid principle, then stop test analysis centrifugal pump failure procedure；If being not reaching to invalid principle, calculate each health data
The difference of change, determines the acceleration time interval t of accelerated aging next time according to difference, then again accelerates to lose efficacy, Zhi Daoli
Heart pump lost efficacy.
Claims (9)
1. a kind of online accelerated life test platform of mining centrifugal pump it is characterised in that：Described centrifugal pump accelerated life test is put down
Platform is to be equipped with monitoring and controlling system by Two-way Cycle measurement isolation pipeline structure to constitute；
Described Two-way Cycle measurement isolation pipeline structure, including centrifugal pump（1）, sand water tank（2）, filtered water tank（3）, malleation meter（4）, negative
Pressure meter（5）, effusion meter（6）With valve V1 ~ V5；Wherein：
Centrifugal pump（1）It is by valve III（V3）With sand water tank（2）Sand water tank is extracted in connection（2）In silt water, and through valve
Silt water is sent into sand water tank by door V4 and valve V5（2）Constitute accelerated aging circulation line；
Centrifugal pump（1）It is by valve V1 and filtered water tank（3）Filtered water tank is extracted in connection（3）In clear water, and through valve V2, stream
Gauge（6）With valve V5, clear water is sent into filtered water tank（3）Constitute measurement circulation line；
Malleation meter（4）It is installed on centrifugal pump（1）Outlet, depressimeter（5）It is installed on centrifugal pump（1）Water inlet；Malleation meter
（4）, depressimeter（5）And effusion meter（6）During for accelerated aging platform loop clear water, measurement centrifugation pump pressure and flow waterpower are joined
Number；
Described monitoring and controlling system, including tachoscope（7）, current transformer（8）, voltage transformer（9）, acceleration transducer
（10）, low-frequency data harvester（11）, high-frequency data harvester（12）, field controller（13）, display operator control panel（14）And control
Computer processed（15）；Wherein：
Low-frequency data harvester（11）With malleation meter（4）, depressimeter（5）, effusion meter（6）And tachoscope（7）Connect, collection centrifugation
Pump（1）Low-frequency data signal during accelerated aging；High-frequency data harvester（12）With current transformer（8）, mutual induction of voltage
Device（9）And acceleration transducer（10）Connect, gather centrifugal pump（1）Electric current in running, voltage and vibration signal；Scene
Controller（13）With valve V1 ~ V5 and centrifugal pump（1）Connect the start and stop controlling centrifugal pump and valve switch；Display operator control panel（14）
With low-frequency data harvester（11）, high-frequency data harvester（12）And acceleration transducer（10）Connect display gathered data and from
Heart pump and valve event situation；Control computer（15）With low-frequency data harvester（11）, high-frequency data harvester（12）With plus
Velocity sensor（10）Connect, remotely show Working Conditions of Centrifugal Injection Pumps, realize remote monitoring, and store gathered data.
2. the online accelerated life test platform of mining centrifugal pump according to claim 1 it is characterised in that：Described effusion meter
（6）It is disposed on the floor level pipeline of matrix pipeline, and matrix pipeline is 5 times or 7 times of direct pipings.
3. the online accelerated life test platform of mining centrifugal pump according to claim 1 it is characterised in that：Described sand water tank
（2）Sand water constituent be quartz sand, quartz sand particle size be 2 ~ 4 mesh, sand water mixing ratio be 1：2.
4. the online accelerated life test platform of mining centrifugal pump according to claim 1 it is characterised in that：Described control is counted
Calculation machine（15）It is that Ethernet is connected with field controller data harvester, the sensor of displaying data in real-time collecting unit transmission
Data, and be stored in computer hard disc, remotely send operational order to field controller simultaneously, execute remote operation.
5. the online accelerated life test platform of mining centrifugal pump according to claim 1 it is characterised in that：The control of described scene
Device processed（13）It is one kind of PLC programming device, the instruction that executive button sends, and according to pipeline situation, automatic switching-over pipeline,
Controlled valve, gathers low-frequency sensor data simultaneously, is uploaded to control computer by Ethernet.
6. the online accelerated life test platform of mining centrifugal pump according to claim 1 it is characterised in that：Described low frequency number
According to harvester（11）With high-frequency data harvester（12）Core devices be the device that capture card or PLC have data acquisition ability
Part, the sample frequency of high-frequency data harvester is at least 10kHz.
7. according to claim 1 or 5 the online accelerated life test platform of mining centrifugal pump it is characterised in that：Described existing
Field controller（13）Including centrifugal pump start-stop button, pipeline switching push button, general export's control valve opening adjusting knob, measurement button
And alarm buzzer；Wherein, measurement button is to be automatically brought into operation general export's control valve opening, and records real-time traffic and pressure, and
It is transferred to control computer and simulate centrifugal pump（1）Real-time characteristic curve；Field controller（13）Sentenced according to sensor information
Read current centrifugal pump（1）Whether normal work, by buzzer warning.
8. a kind of test method for the online accelerated life test platform of mining centrifugal pump as claimed in claim 1, described
It is sand water fluid-mixing in the sand water tank in accelerated life test circulation line in test method, for accelerating centrifugal pump to grind
Damage；The medium in filtered water tank in measurement circulation line is clear water, for measuring the hydraulic performance of centrifugal pump, when acceleration centrifugal pump
During the life-span, by Valve controlling, it flows in sand water tank self-loopa to make medium；When measuring performance of centrifugal pump, control valve, cut
Change pipeline, realize hydraulic performance test using the clear water in filtered water tank.
9. the test method of the online accelerated life test platform of mining centrifugal pump according to claim 8, described test side
In method when measuring characteristic curve of centrifugal pump, valve V1 and valve V2 opens, and valve V3 and valve V4 closes；Accelerated life test
Platform operates on " measurement circulation line ", circulates filtered water tank（3）Interior clear water；By the aperture of control valve V5, measure one
Series P 2, P1 and Q, draw out centrifugal pump according to formula（1）Characteristic curve；
When to centrifugal pump（1）When carrying out accelerating to lose efficacy, valve V1 and valve V2 closes, and valve V3 and valve V4 opens；Accelerate the longevity
Life test platform operates on " accelerated life test circulation line ", recirculation system sand water tank（2）Interior sand water fluid-mixing, by sand
Water tank（2）In the erosion to centrifugal pump for the water containing sand, accelerate centrifugal pump failure procedure.
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| CN111794978A (en) * | 2020-07-23 | 2020-10-20 | 中国核动力研究设计院 | Safety injection pump operation life prediction method and system |
| CN114776603A (en) * | 2022-05-16 | 2022-07-22 | 江苏大学 | Centrifugal circulating pump service life monitoring system and prediction method |
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| CN108035887A (en) * | 2017-11-30 | 2018-05-15 | 青岛海洋地质研究所 | The test system and method that sand wears centrifugal pump in hydrate recovery process |
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| CN111794978A (en) * | 2020-07-23 | 2020-10-20 | 中国核动力研究设计院 | Safety injection pump operation life prediction method and system |
| CN111794978B (en) * | 2020-07-23 | 2022-02-11 | 中国核动力研究设计院 | Safety injection pump operation life prediction method and system |
| CN114776603A (en) * | 2022-05-16 | 2022-07-22 | 江苏大学 | Centrifugal circulating pump service life monitoring system and prediction method |
| CN117267149A (en) * | 2023-11-17 | 2023-12-22 | 国网山西省电力公司电力科学研究院 | Online sensing device and evaluation method for state of high-capacity power transformer oil pump |
| CN117267149B (en) * | 2023-11-17 | 2024-01-23 | 国网山西省电力公司电力科学研究院 | Online sensing device and evaluation method for state of high-capacity power transformer oil pump |
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