CN108664710A - A kind of pump flow-induced vibration performance comprehensive evaluation method - Google Patents
A kind of pump flow-induced vibration performance comprehensive evaluation method Download PDFInfo
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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
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- G—PHYSICS
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- G06F30/00—Computer-aided design [CAD]
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- G06F30/17—Mechanical parametric or variational design
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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
- F04D15/0077—Safety measures
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- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
- G06F17/141—Discrete Fourier transforms
- G06F17/142—Fast Fourier transforms, e.g. using a Cooley-Tukey type algorithm
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- G06F30/20—Design optimisation, verification or simulation
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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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/301—Pressure
- F05D2270/3013—Outlet pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/334—Vibration measurements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/10—Noise analysis or noise optimisation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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Abstract
The present invention provides a kind of pump flow-induced vibration performance comprehensive evaluation method, obtains the pressure fluctuation data in impeller of pump exit first with experimental test or numerical computations and calculate dimensionless pressure ripple factor time domain variation function；Then fast Fourier is carried out to above-mentioned time domain variation function and changes acquisition frequency domain variation function, carry out full range domain search later, arranged from big to small by amplitude and choose first three Frequency point as calculating Frequency point；Then analytic hierarchy process (AHP) is used to determine weight factor of each amplitude for calculating Frequency point in pumping the flow-induced vibration overall evaluation, it is horizontal to evaluate pump body vibration eventually by three rank synthesis oscillation pressure of pump are obtained to the calculating of each amplitude and corresponding weight factor for calculating Frequency point.The present invention considers the amplitude of impeller of pump outlet pressure pulsatile change function multiple Frequency points on frequency domain, overcame it is previous only consider at dominant frequency vibration amplitude to weigh the one-sidedness of pump vibration performance, there is extensive engineering application value.
Description
Technical field
The present invention relates to fluid machinery design field, refer in particular to be related to a kind of pump flow-induced vibration performance synthesis evaluation side
Method.
Background technology
A kind of universal machine of pumping action, plays the important function that do not replace in numerous industrial circles.With society
Development, stability when to pump operation proposes new requirement, and lower level of vibration can not only save energy and improve property
Can, and to ensureing that the service life of pump is also most important.
There are two types of the vibrations of pump：When system vibration caused by mechanical oscillation, second is that vibration caused by flow-induction.The former
Mainly by designing and manufacture is influenced, preferable solution has been obtained by active control technology etc., and the latter mainly by
Caused by UNSTEADY FLOW inside pumping, the mechanism of action is also in continuous research.Pressure fluctuation is as pump Nei Feiding
The specific manifestation form of normal flow performance, while being also the principal element for causing pump flow-induced vibration.But at present for pressure
The analysis method of power pulsation only focuses at dominant frequency the amplitude analysis of (the corresponding frequency of maximum amplitude) mostly, at secondary dominant frequency
The amplitude of (being typically leaf frequency, it is also possible to axis frequency, stator-rotor interaction frequency etc.) considers less.Although these methods can be one
Determine the level of vibration of reaction pump in degree, but when the amplitude at the frequencies such as secondary dominant frequency is larger, this analysis method just seems not
It is enough comprehensive.Therefore, it is badly in need of proposing a kind of method for capableing of overall merit pump flow-induced vibration performance.But so far, still
Have no the relevant report of pump flow-induced vibration integrated evaluating method.
Invention content
In response to the deficiencies in the existing technology, the present invention provides a kind of pump flow-induced vibration performance synthesis evaluation sides
Method, the more comprehensively vibration performance of reflected pump.
The present invention achieves the above technical objects by the following technical means.
A kind of pump flow-induced vibration performance comprehensive evaluation method, comprises the steps of：
Step 1：It chooses and is used as monitoring point at impeller outlet, the pressure of monitoring point is obtained using experimental test or numerical computations
Power microseismic data, and calculate the pressure fluctuation coefficient time domain variation function of nondimensionalization；
Step 2：Fast Fourier variation is carried out to pressure fluctuation coefficient time domain variation function and changes letter to obtain frequency domain
Number carries out full range domain search, and it is to calculate Frequency point to choose first three frequency from big to small by amplitude；
Step 3：Determine the amplitude for calculating Frequency point in pumping the flow-induced vibration overall evaluation using analytic hierarchy process (AHP)
Weight factor is shaken by obtaining pump three ranks synthesis to the calculating of each amplitude and corresponding weight factor for calculating Frequency point
Dynamic pressure judges pump flow-induced vibration performance, three rank synthesis oscillation pressures of the pump according to three rank synthesis oscillation pressure of the pump
Qiang Yue great, then it is poorer to pump flow-induced vibration performance, and three rank synthesis oscillation pressure of pump are smaller, then pump flow-induced vibration performance and get over
It is good.
Preferably, it in the step 1, when obtaining data using experimental test, chooses and is used as monitoring point at impeller outlet,
Data sampling, sample frequency f can be carried out after pumping stable operationsIt is chosen to be 1000f1, f1For the axis frequency of pump, duration t=
2T, T are the swing circle of pump to be measured；
When obtaining pressure fluctuation data using numerical computations, it sets correct permanent result of calculation to unsteady computation
Primary condition, and unsteady computation time step is setCalculating total time is 7T, is chosen in most latter two period
Data as pressure fluctuation data.
Preferably, in the step 1, after obtaining pressure fluctuation data, the invalid data in removing pressure fluctuation data is simultaneously
Match with temporal information, obtains pressure fluctuation time domain variation function Fp(t), soft using data processings such as EXCEL or ORIGIN
Obtained pressure fluctuation time domain is changed function F by partp(t) variation is pressure fluctuation coefficient CPTime domain variation function FC(t), real
The nondimensionalization of existing selected variable, whereinP is the static pressure of monitoring point at impeller outlet；For in 1 swing circle
The average static pressure of monitoring point at impeller outlet；ρ is fluid density；U is the peripheral speed of monitoring point at impeller outlet.
Preferably, the step 2 is specific as follows：
(1) function F is changed to obtained pressure fluctuation coefficient time domain by Data Analysis Software such as ORIGIN or MATLABC
(t) it carries out fast Fourier variation and changes function to obtain corresponding frequency domain；
(2) Data Analysis Software such as MATLAB or EXCEL or ORIGIN is used to change function to the frequency domain that step (1) obtains
Global search is carried out, the data of each Frequency point are arranged in order according to the descending sequence of amplitude, amplitude is chosen and comes first three
The Frequency point of position is as calculating Frequency point.
Preferably, the step 3 is specific as follows：
S1：Judge layer matrix A according to the correlation structure of each calculating Frequency point and its amplitude is intermediate, it is specific as follows：
Three data for calculating Frequency point are arranged in order according to amplitude is descending as (f1,A1)、(f2,A2)、(f3,
A3), define element aij(i<The value of j, i and j are 1,2 or value 3) is closest to bijA positive integer,Andaii=1；
aijMeaning be：About calculating Frequency point amplitude for the importance of pump flow-induced vibration, i-th of calculating frequency
Point amplitude is a of j-th of calculating Frequency point amplitudeijTimes, such as：a12=3, meaning is：First calculates frequency amplitude to pump
The importance of body vibration is 3 times of second calculating frequency.With aijStructure is intermediate to judge layer matrixIn this way, analytic hierarchy process (AHP) organically combines qualitative method with quantitative approach,
It ensure that the weight factor obtained is suitable and correct.
S2：Operating specification column average method judges that layer A is calculated to centre, obtains each weight for calculating Frequency point amplitude
The factor；
Layer matrix A, which is normalized, to be judged to centre first, obtains matrixWhereinIt sums to each row element of B matrixes and is normalized to obtain feature vectorIts
InElement in W matrixes be it is each calculate Frequency point amplitude to pump flow-induced vibration weight because
Son；
S3：Three rank synthesis oscillation pressure of pump are calculatedWherein ρ is that fluid is close
Degree；U is the peripheral speed of monitoring point at impeller outlet, and the smaller representative pump flow-induced vibration performance of L values is better, L values bigger generation
It is poorer that table pumps flow-induced vibration performance.
Preferably, the Data Analysis Software is MATLAB softwares or ORIGIN softwares.
Beneficial effects of the present invention：
1) pilot process is suitable for variety classes pump under different operating modes using pressure fluctuation coefficient as dimensionless variable
Vibration performance assessment, have extensive prospect of the application.
2) weight factor of different frequency point amplitude is calculated using analytic hierarchy process (AHP), more can comprehensively give expression to each frequency
Significance level of the rate point amplitude to pump flow-induced vibration performance.
3) evaluation method relates to three Frequency points of amplitude maximum on frequency domain, three rank synthesis oscillation pressures of calculated pump
By force can more fully, compactly reflected pump flow-induced vibration performance.
Description of the drawings
Fig. 1 is a kind of flow chart of pump flow-induced vibration performance comprehensive evaluation method of the present invention.
Fig. 2 is the pressure fluctuation coefficient time domain variation diagram at pump discharge in embodiment.
Fig. 3 is the pressure fluctuation coefficient frequency domain variation diagram at pump discharge in embodiment.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is simultaneously
It is without being limited thereto.
The present embodiment uses specific revolution for 27 Pyatyi centrifugal pump, design discharge Q=5m3/ h, lift H=36m, rotating speed
N=2900r/min, impeller blade number z=8, guide vane number are 6.
As shown in Figure 1, a kind of pump flow-induced vibration performance comprehensive evaluation method, comprises the steps of：
Step 1：It chooses and is used as monitoring point at impeller outlet, the pressure of monitoring point is obtained using experimental test or numerical computations
Power microseismic data, and nondimensionalization pressure fluctuation coefficient time domain variation function is calculated, it is specific as follows：
1) it chooses and is used as monitoring point at impeller outlet, the pressure fluctuation of monitoring point is obtained using experimental test or numerical computations
Data, the present embodiment obtain pressure fluctuation data using numerical computations, set correct permanent result of calculation to unsteady meter
The primary condition of calculation, and unsteady computation time step is setCalculating total time is 7T=
0.14483s chooses the data in most latter two period as pressure fluctuation data；
2) it removes the invalid data in pressure fluctuation data and matches with temporal information, obtain the variation of pressure fluctuation time domain
Function Fp(t), obtained pressure fluctuation time domain is changed by function F using EXCEL softwaresp(t) variation is pressure fluctuation coefficient
CPTime domain variation function FC(t), as shown in Fig. 2, realizing nondimensionalization, whereinP is monitoring point at impeller outlet
Static pressure；For the average static pressure of 1 swing circle inner impeller exit monitoring point；ρ is fluid density；U is at impeller outlet
The peripheral speed of monitoring point.
Step 2：Fast Fourier variation is carried out to pressure fluctuation coefficient time domain variation function and changes letter to obtain frequency domain
Number, as shown in figure 3, carrying out full range domain search, it is to calculate Frequency point to choose first three frequency from big to small by amplitude, specifically such as
Under：
(1) function F is changed to obtained pressure fluctuation coefficient time domain by MATLAB softwaresC(t) fast Fourier is carried out
Variation changes function to obtain corresponding frequency domain；
(2) ORIGIN softwares are used to carry out global search to the frequency domain variation function that step (1) obtains, by each Frequency point
Data are arranged in order according to the descending sequence of amplitude, are chosen amplitude and are come the Frequency point of front three as calculating Frequency point.
Step 3：Determined using analytic hierarchy process (AHP) calculate weight of the amplitude in the integrated evaluating method of Frequency point because
Son obtains three rank synthesis oscillation pressures of pump by each amplitude weight factor corresponding with its for calculating Frequency point calculate
By force, pump flow-induced vibration performance is judged according to three rank synthesis oscillation pressure of the pump, three rank synthesis oscillation pressure of the pump are got over
Greatly, pump flow-induced vibration performance is poorer, specific as follows：
S1：Judge layer matrix A according to the correlation structure of each calculating Frequency point and its amplitude is intermediate, it is specific as follows：
Three data for calculating Frequency point are arranged in order according to amplitude is descending as (f1,A1)、(f2,A2)、(f3,
A3), (f1,A1)、(f2,A2)、(f3,A3), concrete numerical value be (386.667,0.0246), (48.333,0.0041), (870,
0.0024)。
Define element aij(i<The value of j, i and j are 1,2 or value 3) is closest to bijA positive integer,
Andaii=1, aijMeaning be：About calculate Frequency point amplitude for pump flow-induced vibration importance, i-th
Calculate a that Frequency point amplitude is j-th of calculating Frequency point amplitudeijTimes, utilize formulaDetermine b12=6, b13=
10.25,b23=1.7083, the immediate positive integer of these numerical value is taken, and be defined as a12、a13、a23, its concrete numerical value be respectively
6、10、2.It is then specifically intermediate to judge that layer each element value is as follows：a11=1, a12=6, a13=10, a21=1/6, a22=1, a23
=2, a31=1/10, a32=1/2, a33=1.Centre, which is built, with this judges layer matrix
S2：Operating specification column average method judges that layer A is calculated to centre, obtains each weight for calculating Frequency point amplitude
The factor；
Layer matrix A, which is normalized, to be judged to centre first, obtains matrixI.e.WhereinIt sums to each row element of B matrixes and carries out normalizing
Change handles to obtain feature vectorI.e.WhereinElement in W matrixes is
Be weight factor of the amplitude to pump flow-induced vibration of each calculating Frequency point, then it is each to calculate body vibration of the Frequency point to pump
The weight factor d of performance is respectively d1=0.7862, d2=0.1396, d3=0.0742.
S3：Three rank synthesis oscillation pressure of pump are calculatedWherein ρ is fluid
Density；U is the peripheral speed of monitoring point at impeller outlet, and the smaller representative pump flow-induced vibration performance of L values is better, and L values are bigger
It is poorer to represent pump flow-induced vibration performance.In the present embodiment
L=(0.7862*0.0246+0.1396*0.0041+0.0742*0.0024) * 93200=1872.4775, according to
The flow-induced vibration performance synthesis that this numerical value can carry out between selected pump and other pumps is assessed compared with.The small pump of L numerical value,
Its flow-induced vibration performance pump big better than L numerical value.
The embodiment is the preferred embodiments of the present invention, but present invention is not limited to the embodiments described above, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification all belongs to the scope of protection of the present invention.
Claims (6)
1. a kind of pump flow-induced vibration performance comprehensive evaluation method, which is characterized in that comprise the steps of：
Step 1：It chooses and is used as monitoring point at impeller outlet, the pressure arteries and veins of monitoring point is obtained using experimental test or numerical computations
Dynamic data, and calculate the pressure fluctuation coefficient time domain variation function of nondimensionalization；
Step 2：Fast Fourier variation is carried out to pressure fluctuation coefficient time domain variation function and changes function to obtain frequency domain, into
Row full range domain search, it is to calculate Frequency point to choose first three Frequency point from big to small by amplitude；
Step 3：Weight of the amplitude for calculating Frequency point in pumping flow-induced vibration overall merit is determined using analytic hierarchy process (AHP)
The factor obtains three rank synthesis oscillations of pump by each amplitude for calculating Frequency point and corresponding weight factor calculate
Pressure judges pump flow-induced vibration performance, three rank synthesis oscillation pressure of the pump according to three rank synthesis oscillation pressure of the pump
Bigger, then it is poorer to pump flow-induced vibration performance, and three rank synthesis oscillation pressure of pump are smaller, then pump flow-induced vibration performance and get over
It is good.
2. pump flow-induced vibration performance comprehensive evaluation method according to claim 1, which is characterized in that
It in the step 1, when obtaining data using experimental test, chooses and is used as monitoring point at impeller outlet, when pump stable operation
After can carry out data sampling, sample frequency fsIt is chosen to be 1000f1, f1For the axis frequency of pump, duration t=2T, T are pump to be measured
Swing circle；
When obtaining pressure fluctuation data using numerical computations, it sets correct permanent result of calculation to the initial of unsteady computation
Condition, and unsteady computation time step is setCalculating total time is 7T, chooses the number in most latter two period
According to as pressure fluctuation data.
3. pump flow-induced vibration performance comprehensive evaluation method according to claim 1, which is characterized in that
In the step 1, after obtaining pressure fluctuation data, the invalid data in pressure fluctuation data and and temporal information are removed
Match, obtains pressure fluctuation time domain variation function Fp(t), obtained pressure fluctuation time domain is changed using data processing software
Function Fp(t) variation is pressure fluctuation coefficient CPTime domain variation function FC(t), nondimensionalization is realized, whereinP is
The static pressure of monitoring point at impeller outlet；For the average static pressure of 1 swing circle inner impeller exit monitoring point；ρ is that fluid is close
Degree；U is the peripheral speed of monitoring point at impeller outlet.
4. pump flow-induced vibration performance comprehensive evaluation method according to claim 1, which is characterized in that the step 2
It is specific as follows：
(1) function F is changed to obtained pressure fluctuation coefficient time domain by Data Analysis SoftwareC(t) fast Fourier variation is carried out
Change function to obtain corresponding frequency domain；
(2) Data Analysis Software is used to carry out global search to the frequency domain variation function that step (1) obtains, by the number of each Frequency point
It is arranged in order according to according to the descending sequence of amplitude, chooses amplitude and come the Frequency point of front three as calculating Frequency point.
5. pump flow-induced vibration performance comprehensive evaluation method according to claim 1, which is characterized in that the step 3
It is specific as follows：
S1：Judge layer matrix A according to the correlation structure of each calculating Frequency point and its amplitude is intermediate, it is specific as follows：
Three data for calculating Frequency point are arranged in order according to amplitude is descending as (f1,A1)、(f2,A2)、(f3,A3),
Define element aij(i<The value of j, i and j are 1,2 or value 3) is closest to bijA positive integer,Andaii=1；
aijMeaning be：About calculating Frequency point amplitude for the importance of pump flow-induced vibration, i-th of calculating Frequency point width
The a that value calculates Frequency point amplitude for j-thijTimes, with aijStructure is intermediate to judge layer matrix
S2：Operating specification column average method to centre judge that layer A is calculated, obtain it is each calculating Frequency point amplitude weight because
Son；
Layer matrix A, which is normalized, to be judged to centre first, obtains matrixWhereinIt sums to each row element of B matrixes and is normalized to obtain feature vectorIts
InElement in W matrixes be it is each calculate Frequency point amplitude to pump flow-induced vibration weight because
Son；
S3：Three rank synthesis oscillation pressure of pump are calculatedWherein ρ is fluid density；u
For the peripheral speed of monitoring point at impeller outlet, the smaller representative pump flow-induced vibration performance of L values is better, the bigger representative pump of L values
Flow-induced vibration performance is poorer..
6. pump flow-induced vibration performance comprehensive evaluation method according to claim 4, which is characterized in that the data point
It is MATLAB softwares or ORIGIN softwares to analyse software.
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| CN201810361545.3A CN108664710A (en) | 2018-04-20 | 2018-04-20 | A kind of pump flow-induced vibration performance comprehensive evaluation method |
| GB2016276.4A GB2586756B (en) | 2018-04-20 | 2018-05-04 | Comprehensive evaluation method for flow-induced vibration performance of pump |
| PCT/CN2018/085521 WO2019200624A1 (en) | 2018-04-20 | 2018-05-04 | Comprehensive evaluation method for pump flow induced vibration performance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114222863A (en) * | 2019-09-25 | 2022-03-22 | 哈里伯顿能源服务公司 | Method of calculating viscous performance of a pump based on its aqueous performance characteristics and new dimensionless parameters for controlling and monitoring viscosity, flow and pressure |
| CN114251277A (en) * | 2021-12-22 | 2022-03-29 | 南水北调东线江苏水源有限责任公司 | Method for monitoring operation condition of water pump by comparing water flow pulsation conditions before and after pump section |
| CN115076085A (en) * | 2022-06-10 | 2022-09-20 | 西安理工大学 | Pressure pulsation identification method for flow state in suction pipe of water pump station |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112539828B (en) * | 2020-12-08 | 2023-03-21 | 中水三立数据技术股份有限公司 | Pump unit equipment diagnosis method, system and equipment based on curve fitting contrast analysis |
| CN112667958A (en) * | 2020-12-25 | 2021-04-16 | 淮安市水利勘测设计研究院有限公司 | Water outlet flow channel pulsation analysis method based on energy characteristics |
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- 2018-05-04 WO PCT/CN2018/085521 patent/WO2019200624A1/en active Application Filing
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| CN114222863A (en) * | 2019-09-25 | 2022-03-22 | 哈里伯顿能源服务公司 | Method of calculating viscous performance of a pump based on its aqueous performance characteristics and new dimensionless parameters for controlling and monitoring viscosity, flow and pressure |
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| CN114251277A (en) * | 2021-12-22 | 2022-03-29 | 南水北调东线江苏水源有限责任公司 | Method for monitoring operation condition of water pump by comparing water flow pulsation conditions before and after pump section |
| CN115076085A (en) * | 2022-06-10 | 2022-09-20 | 西安理工大学 | Pressure pulsation identification method for flow state in suction pipe of water pump station |
| CN115076085B (en) * | 2022-06-10 | 2023-06-23 | 西安理工大学 | Pressure pulsation identification method for internal flowing state of suction pipe of water pump station |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2586756A (en) | 2021-03-03 |
| WO2019200624A1 (en) | 2019-10-24 |
| GB2586756B (en) | 2021-09-08 |
| GB202016276D0 (en) | 2020-11-25 |
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