CN105864060A - Assessment method and system for operation effect of centrifugal pump - Google Patents
Assessment method and system for operation effect of centrifugal pump Download PDFInfo
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- CN105864060A CN105864060A CN201610288122.4A CN201610288122A CN105864060A CN 105864060 A CN105864060 A CN 105864060A CN 201610288122 A CN201610288122 A CN 201610288122A CN 105864060 A CN105864060 A CN 105864060A
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- centrifugal pump
- operational effect
- scoring
- temperature
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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
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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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- 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
- F05D2260/00—Function
- F05D2260/83—Testing, e.g. methods, components or tools therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention discloses an assessment method and system for the operation effect of a centrifugal pump. The hydraulic operation parameter and/or the mechanical operation parameter during operation of the centrifugal pump are/is acquired, the centrifugal pump operation effect is assessed according to the acquired hydraulic operation parameter and/or the mechanical operation parameter and the preset centrifugal pump operation assessment standard, and the score of the centrifugal pump operation effect is provided. The hydraulic operation parameter comprises an efficiency parameter and/or cavitation parameter; and the mechanical operation parameter comprises a vibration parameter and/or temperature parameter. The technical problems that an existing assessment method for the operation effect of the centrifugal pump has to rely on the experience and knowledge of professionals and a large amount of manpower and a great number of material resources need to be consumed are solved. According to the assessment method and system for the operation effect of the centrifugal pump, the operation is simple, the consumption of manpower and material resources is largely lowered, and the practicability and operability are high.
Description
Technical field
The present invention relates to centrifugal pump detection field, especially, relate to a kind of centrifugal pump operational effect decision method and system.
Background technology
Centrifugal pump, as a kind of universal machine, is not only widely used in the productive life of people, and is in commercial production
Big power consumer, the whole nation has the electric energy of 1/4 to be all used in driving on centrifugal pump.Therefore the judgement of centrifugal pump operational effect seems the heaviest
Want.But centrifugal pump operational effect decision method of the prior art is because relate to all multiparameters, be related to centrifugal pump run with
The every aspect of using effect, such as vibration, noise, temperature, efficiency, axial force, radial force, power, torque and rotating speed
Etc., to carry out a centrifugal pump more comprehensively evaluating and must very professional technical team can accomplishing, single skill
Art personnel are difficult to have so comprehensively the scope of one's knowledge, and need during centrifugal pump thoroughly evaluating to use the most valuable centrifugal pump detection to set
For detecting.It follows that existing centrifugal pump operational effect decision method have to rely on professional and technical personnel experience and
Knowledge and substantial amounts of man power and material need to be expended.
Therefore, existing centrifugal pump operational effect decision method has to rely on the experience and knowledge of professional and technical personnel and needs to expend
Substantial amounts of man power and material, is a technical problem urgently to be resolved hurrily.
Summary of the invention
The invention provides a kind of centrifugal pump operational effect decision method and system, to solve the judgement of existing centrifugal pump operational effect
Method has to rely on the experience and knowledge of professional and technical personnel and need to expend the technical problem of a large amount of man power and material.
The technical solution used in the present invention is as follows:
According to an aspect of the present invention, it is provided that a kind of centrifugal pump operational effect decision method, including step:
Obtain waterpower operational factor when centrifugal pump runs and/or mechanical operating parameters；
According to the waterpower operational factor obtained and/or mechanical operating parameters and default centrifugal pump postitallation evaluation standard, to centrifugal pump
Operational effect is evaluated, and provides the scoring of centrifugal pump operational effect, wherein, waterpower operational factor include efficiency parameters and/or
Cavitation parameter, mechanical operating parameters includes vibration parameters and/or temperature parameter.
Further, efficiency parameters is efficiency relative number, according to the waterpower operational factor obtained and/or mechanical operating parameters and pre-
If centrifugal pump postitallation evaluation standard, centrifugal pump operational effect is evaluated, and provides the step of the scoring of centrifugal pump operational effect
Suddenly include:
Obtain actual flow when centrifugal pump runs and metered flow；
According to the actual flow obtained and metered flow, calculate flow relative number；
According to the flow relative number calculated, draw flow relative ratio cartogram；
According to the flow relative ratio cartogram drawn, matching centrifugal pump equation；
Centrifugal pump equation according to matching, draws efficiency relative number, provides the efficiency scoring of centrifugal pump operational effect.
Further, cavitation parameter is vacuum ratio, according to the waterpower operational factor obtained and/or mechanical operating parameters and default
Centrifugal pump postitallation evaluation standard, is evaluated centrifugal pump operational effect, and provides the step bag of the scoring of centrifugal pump operational effect
Include:
Obtain the pressure for vaporization value that centrifugal pump is corresponding under difference runs water temperature；
According to the pressure for vaporization value obtained, draw pressure for vaporization relative ratio cartogram；
According to the pressure for vaporization relative ratio cartogram drawn, matching pressure for vaporization polynomial equation；
Pressure for vaporization polynomial equation according to matching, calculates centrifugal pump pressure for vaporization value under observed temperature；
Obtain the specified net positive suction head of centrifugal pump, and according to the centrifugal pump calculated pressure for vaporization value under observed temperature and acquisition
The specified net positive suction head of centrifugal pump, draws centrifugal pump theory net positive suction head；
Obtain vacuum at centrifugal pump inlet, and according to vacuum at the centrifugal pump inlet obtained and the centrifugal pump theory cavitation drawn
Surplus, calculates vacuum ratio；
Cavitation scoring formula according to the vacuum ratio calculated and setting, provides the cavitation scoring of centrifugal pump operational effect.
Further, vibration parameters is vibration class, according to obtain waterpower operational factor and/or mechanical operating parameters and preset
Centrifugal pump postitallation evaluation standard, centrifugal pump operational effect is evaluated, and provides the step of the scoring of centrifugal pump operational effect
Including:
Obtain classification and the vibration class of centrifugal pump；
According to the centrifugal pump classification obtained and vibration class and default centrifugal pump vibration evaluation criterion, to centrifugal pump operational effect
It is evaluated, provides the vibration scoring of centrifugal pump operational effect.
Further, temperature parameter is bearing ascending temperature, according to obtain waterpower operational factor and/or mechanical operating parameters and
The centrifugal pump postitallation evaluation standard preset, is evaluated centrifugal pump operational effect, and provide the scoring of centrifugal pump operational effect
Step includes:
Obtain bearing ascending temperature when centrifugal pump runs；
Bearing ascending temperature when running according to the centrifugal pump obtained and default centrifugal pump temperature evaluation criterion, provide centrifugal pump
The temperature scoring of operational effect.
According to a further aspect in the invention, additionally provide a kind of centrifugal pump operational effect decision-making system, including:
Acquisition module, for obtaining waterpower operational factor when centrifugal pump runs and/or mechanical operating parameters；
Grading module is for according to the centrifugal pump classification obtained and vibration class and default centrifugal pump vibration evaluation criterion, right
Centrifugal pump operational effect is evaluated, and provides the scoring of centrifugal pump operational effect, and wherein, waterpower operational factor includes that efficiency is joined
Number and/or cavitation parameter, mechanical operating parameters includes vibration parameters and/or temperature parameter.
Further, grading module includes:
First acquiring unit, for obtaining actual flow when centrifugal pump runs and metered flow；
First computing unit, for according to the actual flow obtained and metered flow, calculating flow relative number；
First drawing unit, for according to the flow relative number calculated, draws flow relative ratio cartogram；
First fitting unit, for according to the flow relative ratio cartogram drawn, matching centrifugal pump equation；
First scoring unit, for the centrifugal pump equation according to matching, draws efficiency relative number, provides centrifugal pump operational effect
Efficiency is marked.
Further, grading module also includes:
Second acquisition unit, for obtaining the pressure for vaporization value that centrifugal pump is corresponding under difference runs water temperature；
Second drawing unit, for according to the pressure for vaporization value obtained, draws pressure for vaporization relative ratio cartogram；
Second fitting unit, for according to the pressure for vaporization relative ratio cartogram drawn, matching pressure for vaporization polynomial equation；
Second computing unit, for the pressure for vaporization polynomial equation according to matching, calculates centrifugal pump vapour under observed temperature
Change force value；
3rd computing unit, is used for obtaining the specified net positive suction head of centrifugal pump, and according to the centrifugal pump calculated under observed temperature
The specified net positive suction head of centrifugal pump of pressure for vaporization value and acquisition, draws centrifugal pump theory net positive suction head；
4th computing unit, is used for obtaining vacuum at centrifugal pump inlet, and according to vacuum at the centrifugal pump inlet obtained and
The centrifugal pump theory net positive suction head gone out, calculates vacuum ratio；
Second scoring unit, according to the cavitation scoring formula of the vacuum ratio calculated and setting, provides the vapour of centrifugal pump operational effect
Erosion scoring.
Further, grading module also includes:
3rd acquiring unit, for obtaining classification and the vibration class of centrifugal pump；
3rd scoring unit, for according to the classification obtained and vibration class and default centrifugal pump vibration evaluation criterion, being given
The vibration scoring of centrifugal pump operational effect.
Further, grading module also includes:
4th acquiring unit, for obtaining bearing ascending temperature when centrifugal pump runs；
4th scoring unit, bearing ascending temperature and default centrifugal pump temperature during for running according to the centrifugal pump obtained are commented
Price card is accurate, provides the temperature scoring of centrifugal pump operational effect.
The method have the advantages that
The present invention propose centrifugal pump operational effect decision method and system, waterpower operational factor during by centrifugal pump is run with/
Or centrifugal pump operational effect is evaluated by mechanical operating parameters, and provide the scoring of centrifugal pump operational effect, solve existing
Centrifugal pump operational effect decision method has to rely on the experience and knowledge of professional and technical personnel and need to expend a large amount of man power and material's
Technical problem, the present invention is simple to operate, greatly reduce the loss of man power and material and practicality and strong operability.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.Below
Will be with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing a further understanding of the present invention, the illustrative examples of the present invention and
Its explanation is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of centrifugal pump operational effect decision method first embodiment of the present invention；
Fig. 2 is to run according to the waterpower operational factor obtained and/or described mechanical operating parameters and default centrifugal pump in Fig. 1 to comment
Price card is accurate, is evaluated centrifugal pump operational effect, and the first embodiment providing the step of the scoring of centrifugal pump operational effect is thin
Change schematic flow sheet；
Fig. 3 is the flow relative ratio cartogram drawn；
Fig. 4 is to run according to the waterpower operational factor obtained and/or described mechanical operating parameters and default centrifugal pump in Fig. 1 to comment
Price card is accurate, is evaluated centrifugal pump operational effect, and the second embodiment providing the step of the scoring of centrifugal pump operational effect is thin
Change schematic flow sheet；
Fig. 5 is the pressure for vaporization relative ratio cartogram drawn；
Fig. 6 is cavitation scoring cartogram；
Fig. 7 is to run according to the waterpower operational factor obtained and/or described mechanical operating parameters and default centrifugal pump in Fig. 1 to comment
Price card is accurate, is evaluated centrifugal pump operational effect, and the 3rd embodiment providing the step of the scoring of centrifugal pump operational effect is thin
Change schematic flow sheet；
Fig. 8 is to run according to the waterpower operational factor obtained and/or described mechanical operating parameters and default centrifugal pump in Fig. 1 to comment
Price card is accurate, is evaluated centrifugal pump operational effect, and the 4th embodiment providing the step of the scoring of centrifugal pump operational effect is thin
Change schematic flow sheet；
Fig. 9 is temperature scoring cartogram；
Figure 10 is that the functional module of centrifugal pump operational effect decision maker first embodiment of the present invention connects block diagram；
Figure 11 is the high-level schematic functional block diagram of grading module first embodiment in Figure 10；
Figure 12 is the high-level schematic functional block diagram of grading module the second embodiment in Figure 10；
Figure 13 is the high-level schematic functional block diagram of grading module the 3rd embodiment in Figure 10；
Figure 14 is the high-level schematic functional block diagram of grading module the 4th embodiment in Figure 10.
Accompanying drawing mark explanation:
10, acquisition module；20, grading module；211, the first acquiring unit；212, the first computing unit；213, first paint
Unit processed；214, the first fitting unit；215, the first scoring unit；221, second acquisition unit；222, second list is drawn
Unit；223, the second fitting unit；224, the second computing unit；225, the 3rd computing unit；226, the 4th computing unit；
227, the second scoring unit；231, the 3rd acquiring unit；232, the 3rd scoring unit；241, the 4th acquiring unit；242、
4th scoring unit.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
With reference to Fig. 1, the preferred embodiments of the present invention provide a kind of centrifugal pump operational effect decision method, including step:
Waterpower operational factor when step S100, acquisition centrifugal pump run and/or mechanical operating parameters.
Waterpower operational factor when centrifugal pump operational effect decision maker acquisition centrifugal pump runs and/or mechanical operating parameters, wherein,
Waterpower operational factor includes efficiency parameters and/or cavitation parameter, and mechanical operating parameters includes vibration parameters and/or temperature parameter.
Step S200, according to the waterpower operational factor obtained and/or mechanical operating parameters and default centrifugal pump postitallation evaluation standard,
Centrifugal pump operational effect is evaluated, and provides the scoring of centrifugal pump operational effect.
Centrifugal pump operational effect decision maker is according to the waterpower operational factor obtained and/or mechanical operating parameters and default centrifugal pump
Postitallation evaluation standard, is evaluated centrifugal pump operational effect, and provides the scoring of centrifugal pump operational effect.Wherein, waterpower fortune
Weight and computational methods in line parameter and/or mechanical operating parameters are as follows:
Efficiency parameters represents that energy consumption has deviation, and being not offered as centrifugal pump can not run, although also affect the effect that centrifugal pump runs,
But generally centrifugal pump will not damage.Cavitation parameter directly affects the operational effect of centrifugal pump, when cavitation drops to critical point
Time neighbouring, centrifugal pump will occur serious cavitation；When cavitation crosses critical point, centrifugal pump cannot run in theory,
So when cavitation is evaluated as zero, centrifugal pump overall score also should be zero, in order to remind user's centrifugal pump currently time the most logical
Can not run under situation.Although vibration parameters can not make pump not run at once, but the probability of malfunction that vibration parameters causes is very big,
Major part installation standard and equipment standard there is the regulation vibration parameters equipment that exceeds standard can not run at all, so should in overall score
Should be for the relation of "AND".Although temperature parameter will not make pump not run at once, but the fault that temperature causes is probably at 2 hours
In will occur at once, major part installation standard and equipment standard have the set point of temperature equipment that exceeds standard can not run at all, so
It overall score is also the relation of "AND".
For the above-mentioned reasons, final scoring formula is:
F=FE×FC×FV×FT (1)
Wherein, F is overall score, FEMark for efficiency, FCMark for cavitation, FVFor vibration scoring, FTMark for temperature,
This evaluation methodology both can individually or combination in any evaluation, it is also possible to the overall evaluation, but in order to show differentiation, respectively with 4 units
The combination of the English word of element defines its evaluation method, and wherein, efficiency (Efficiency) refers to that available power is to driving power
Ratio；Cavitation (Cavitation) refers to that the fluid flowed is due to the phenomenon reducing generation steam bubble of local pressure；Vibration
(Vibration) process that a state changes, the i.e. reciprocating motion of object are referred to；Temperature (Temperature) is to represent that object is cold and hot
The physical quantity of degree, evaluates and is just defined with the representative of 4 above English alphabets, and thoroughly evaluating is ECVT pattern,
Can also be by efficiency and cavitation (EC), vibration and temperature (VT) or only evaluate efficiency (E) and cavitation (C) etc.,
This is not construed as limiting.
The centrifugal pump operational effect decision method that the present embodiment proposes, waterpower operational factor during by centrifugal pump is run and/or machine
Centrifugal pump operational effect is evaluated by tool operational factor, and provides the scoring of centrifugal pump operational effect, solves existing centrifugal
Pump operation effect determining method has to rely on the experience and knowledge of professional and technical personnel and need to expend the technology of a large amount of man power and material
Problem, the present embodiment propose centrifugal pump operational effect decision method, simple to operate, greatly reduce man power and material loss,
And practicality and strong operability.
As in figure 2 it is shown, the centrifugal pump operational effect decision method that the present embodiment proposes, step S200 includes:
Actual flow when step S210, acquisition centrifugal pump run and metered flow.
Centrifugal pump operational effect decision maker obtains actual flow Q when centrifugal pump runsSWith metered flow QE, wherein, centrifugal pump
Metered flow Q during operationECan be learnt by centrifugal pump nameplate data, actual flow QSCan be learnt by testing flow meter.
Step S211, according to obtain actual flow and metered flow, calculate flow relative number.
Flow relative number can be calculated by following equation:
QB=QS÷QE (2)
Wherein, QBFor flow relative number (nondimensional), QSFor actual flow, unit is m3/h；QEFor metered flow, unit
For m3/h.
The flow relative number that step S212, basis calculate, draws flow relative ratio cartogram.
According to the flow relative number Q calculatedB, draw out flow relative ratio cartogram, as it is shown on figure 3, wherein, by specified
Flow is set to 1, and peak efficiency relative number is set to 100%, and abscissa represents flow relative number QB, vertical coordinate represents efficiency relative number
ηB。
Step S213, according to draw flow relative ratio cartogram, matching centrifugal pump equation.
According to the flow relative ratio cartogram drawn out, matching centrifugal pump equation is:
ηB=-0.3891QB 3-0.1762QB 2+1.5531QB+0.1137 (3)
Wherein, ηBFor efficiency relative number (nondimensional), QBFor flow relative number (nondimensional).
Step S214, centrifugal pump equation according to matching, draw efficiency relative number, provides the efficiency scoring of centrifugal pump operational effect.
Centrifugal pump equation according to matching, draws efficiency relative number ηB, and directly using the efficiency relative number that draws as efficiency
Scoring, thus provide the efficiency scoring of centrifugal pump operational effect.
FE=ηB (4)
The centrifugal pump operational effect decision method that the present embodiment proposes, according to the flow relative number calculated, draws flow and compares
Data-Statistics figure, according to the flow relative ratio cartogram drawn, matching centrifugal pump equation, according to the centrifugal pump equation of matching, obtains
Going out efficiency relative number, provide the efficiency scoring of centrifugal pump operational effect, solving existing centrifugal pump operational effect decision method must
Must rely on the experience and knowledge of professional and technical personnel and need to expend the technical problem of a large amount of man power and material, the present embodiment proposes
Centrifugal pump operational effect decision method, simple to operate, greatly reduce the loss of man power and material and practicality and strong operability.
As shown in Figure 4, the centrifugal pump operational effect decision method that the present embodiment proposes, step S200 also includes:
Step S220, the pressure for vaporization value that acquisition centrifugal pump is corresponding under difference runs water temperature.
Centrifugal pump operational effect decision maker obtains the pressure for vaporization value that centrifugal pump is corresponding under difference runs water temperature, this pressure for vaporization
First value is to be found by reference book, stores the number of centrifugal pump operational effect decision maker the most again by the way of numerical value inputs
According in storehouse, centrifugal pump operational effect decision maker obtains the pressure for vaporization that centrifugal pump is corresponding under difference runs water temperature from data base
Value, its pressure for vaporization value is specifically as shown in table 1, and more pressure for vaporization value can search the relevant experimental data published:
Table 1
Step S221, according to obtain pressure for vaporization value, draw pressure for vaporization relative ratio cartogram.
Centrifugal pump operational effect decision maker is according to the centrifugal pump obtained in data base vaporization pressure of correspondence under difference runs water temperature
Force value, draws pressure for vaporization relative ratio cartogram, the most as shown in Figure 5.
Step S222, according to draw pressure for vaporization relative ratio cartogram, matching pressure for vaporization polynomial equation.
Centrifugal pump operational effect decision maker, according to the pressure for vaporization relative ratio cartogram drawn out, is intended by the method for numerical simulation
Conjunction obtains its pressure for vaporization polynomial equation, and the collated pressure for vaporization polynomial equation that obtains is:
Wherein, T is observed temperature, and unit is DEG C；PQFor the pressure for vaporization value under observed temperature, unit is Pa.
Step S223, pressure for vaporization polynomial equation according to matching, calculate centrifugal pump pressure for vaporization value under observed temperature.
Centrifugal pump operational effect decision maker, according to the pressure for vaporization polynomial equation of matching, can directly calculate centrifugal pump in reality
Pressure for vaporization value P under testing temperatureQ。
Step S224, the acquisition specified net positive suction head of centrifugal pump, and according to the centrifugal pump calculated pressure for vaporization under observed temperature
Value and the specified net positive suction head of centrifugal pump obtained, draw centrifugal pump theory net positive suction head.
Centrifugal pump operational effect decision maker is according to centrifugal pump nameplate data acquisition centrifugal pump specified net positive suction head NPSHE, and according to
The centrifugal pump directly calculated pressure for vaporization value P under observed temperatureQWith the centrifugal pump specified net positive suction head NPSH obtainedE,
Go out centrifugal pump theory net positive suction head HL, centrifugal pump theory net positive suction head HLFor:
HL=NPSHE+PQ (6)
Wherein, NPSHEFor specified net positive suction head, unit is m；PQFor centrifugal pump pressure for vaporization value under observed temperature,
Unit is Pa；HLFor centrifugal pump theory net positive suction head, unit is m.
Vacuum at step S225, acquisition centrifugal pump inlet, and centrifugal with draw according to vacuum at the centrifugal pump inlet obtained
Pump theory net positive suction head, calculates vacuum ratio.
Centrifugal pump operational effect decision maker obtains vacuum H at the centrifugal pump inlet of actual measurementS, and according to the centrifugal pump inlet of actual measurement
Place's vacuum HSWith the centrifugal pump theory net positive suction head H drawnL, calculate vacuum and compare HB, vacuum compares HBFor:
HB=HS/(10.33-HL) (7)
Wherein, HBFor vacuum ratio, nondimensional；HSFor vacuum at centrifugal pump inlet, unit is m；HLTheoretical for centrifugal pump
Net positive suction head, unit is m.
The cavitation scoring formula of step S226, the vacuum ratio that basis calculates and setting, the cavitation providing centrifugal pump operational effect is commented
Point.
Centrifugal pump operational effect decision maker compares H according to the vacuum calculatedBCavitation scoring formula with setting, provides centrifugal pump fortune
The cavitation scoring of row effect, wherein, cavitation scoring formula is empirical equation, and cavitation scoring formula is:
When vacuum compares HBWhen >=1, cavitation scoring FC=0；
When vacuum compares HBWhen≤0, cavitation scoring FC=100；
As shown in Figure 6, H is compared when 0 < vacuumB< when 1,
Cavitation scoring FC=-354.41HB 4+373.96HB 3-133.22373.96HB 2+12.829HB+99.89 (8)
The centrifugal pump operational effect decision method that the present embodiment proposes, obtains centrifugal pump specified net positive suction head, and according to calculating
Centrifugal pump pressure for vaporization value under observed temperature and the specified net positive suction head of centrifugal pump of acquisition, draw centrifugal pump theory net positive suction head；
Obtain vacuum at centrifugal pump inlet, and according to vacuum at the centrifugal pump inlet obtained and the centrifugal pump theory net positive suction head drawn,
Calculate vacuum ratio；Cavitation scoring formula according to the vacuum ratio calculated and setting, the cavitation providing centrifugal pump operational effect is commented
Point, solve existing centrifugal pump operational effect decision method and have to rely on the experience and knowledge of professional and technical personnel and need to expend
The technical problem of a large amount of man power and materials, the centrifugal pump operational effect decision method that the present embodiment proposes, simple to operate, significantly drop
The loss of low man power and material and practicality and strong operability.
As it is shown in fig. 7, the centrifugal pump operational effect decision method that the present embodiment proposes, step S200 includes:
Step S230, the classification obtaining centrifugal pump and vibration class.
Centrifugal pump operational effect decision maker obtains the classification of centrifugal pump and vibration class, wherein, the classification of centrifugal pump be according to from
The center of heart pump is high and rotating speed carries out classifying, and is always divided into four classes, the most as shown in table 2:
Table 2
Wherein, the center height of horizontal pump is defined as interplanar distance h (mm) by the axis of pump to the base of pump；Vertical pump is originally
Come high less than center, in order to evaluate vibration rank, take delivery side of pump flange sealing surface to height centered by the projector distance between pump shaft line.
The vibration severity level of centrifugal pump and the scope of vibration severity are as shown in table 3:
Table 3
Step S231, according to the centrifugal pump classification obtained and vibration class and default centrifugal pump vibration evaluation criterion, to centrifugal
Pump operation effect is evaluated, and provides the vibration scoring of centrifugal pump operational effect.
Centrifugal pump operational effect decision maker presets centrifugal pump vibration evaluation criterion, and the vibration rank of centrifugal pump is divided into A, B, C
With D level Four, wherein, D level is defective, and the vibration severity level of centrifugal pump and the other corresponding relation of vibration level are as shown in table 4:
Table 4
According to the above centrifugal pump vibration evaluation criterion preset, when centrifugal pump running status is the first kind or Equations of The Second Kind and vibrates strong
Meter 100 points when degree is within 0.28, centrifugal pump running status is the 3rd class or the 4th class and meter time vibration severity is within 0.45
100 points, remaining state presses table inquiry, A level meter 75 points, B level meter 50 points, C level meter 25 points, D level meter 0 point.
The present embodiment propose centrifugal pump operational effect decision method, according to obtain centrifugal pump classification and vibration class and preset
Centrifugal pump vibration evaluation criterion, centrifugal pump operational effect is evaluated, be given centrifugal pump operational effect vibration scoring, solve
Existing centrifugal pump operational effect decision method of having determined has to rely on the experience and knowledge of professional and technical personnel and need to expend a large amount of people
Power and the technical problem of material resources, the centrifugal pump operational effect decision method that the present embodiment proposes, simple to operate, greatly reduce people
Power and the loss of material resources and practicality and strong operability.
As shown in Figure 8, the centrifugal pump operational effect decision method that the present embodiment proposes, step S200 includes:
Bearing ascending temperature when step S240, acquisition centrifugal pump operation.
Centrifugal pump operational effect decision maker directly checks the temperature of bearing outer ring, obtains bearing temperature when centrifugal pump runs and axle
Hold neighbouring ambient temperature, and calculate bearing ascending temperature.
Set environment temperature is t ', and bearing temperature is t ", bearing ascending temperature is t, then t=t "-t '.
Step S241, according to obtain centrifugal pump run time bearing ascending temperature and default centrifugal pump temperature evaluation criterion,
Provide the temperature scoring of centrifugal pump operational effect.
Centrifugal pump operational effect decision maker is according to the bearing ascending temperature calculated, in conjunction with the centrifugal pump temperature evaluation criterion preset,
Use by stages to judge centrifugal pump operational effect and carry out temperature scoring, temperature scoring FTFor:
When t≤20 DEG C, FT=100；
As it is shown in figure 9, when 20 DEG C≤t≤40 DEG C, FT=0.00167t3-0.341t2+10.81t+6.6 (9)
As t >=40 DEG C or t " when >=80c °, FT=0
Wherein, formula (9) be by deep groove ball bearing, 15 ° and 30 ° of angular contact ball bearings conventional in centrifugal pump in not equality of temperature
Life-span statistical result under Du carries out curve plotting and numerical simulation obtains.
The present embodiment propose centrifugal pump operational effect decision method, according to obtain centrifugal pump run time bearing ascending temperature with
And the centrifugal pump temperature evaluation criterion preset, provide the temperature scoring of centrifugal pump operational effect, solve existing centrifugal pump and run
Effect determining method has to rely on the experience and knowledge of professional and technical personnel and need to expend the technical problem of a large amount of man power and material,
The centrifugal pump operational effect decision method that the present embodiment proposes, simple to operate, greatly reduce the loss of man power and material and real
By property and strong operability.
As shown in Figure 10, the present embodiment also provides for a kind of centrifugal pump operational effect decision-making system, including:
Acquisition module 10, for obtaining waterpower operational factor when centrifugal pump runs and/or mechanical operating parameters；
Grading module 20, is used for according to the centrifugal pump classification obtained and vibration class and default centrifugal pump vibration evaluation criterion,
Centrifugal pump operational effect is evaluated, and provides the scoring of centrifugal pump operational effect.
The acquisition module 10 of centrifugal pump operational effect decision maker obtains waterpower operational factor when centrifugal pump runs and/or machinery fortune
Line parameter, wherein, waterpower operational factor includes efficiency parameters and/or cavitation parameter, mechanical operating parameters include vibration parameters and/or
Temperature parameter.
The grading module 20 of centrifugal pump operational effect decision maker according to obtain waterpower operational factor and/or mechanical operating parameters with
And the centrifugal pump postitallation evaluation standard preset, centrifugal pump operational effect is evaluated, and provides the scoring of centrifugal pump operational effect.
Wherein, the weight in waterpower operational factor and/or mechanical operating parameters and computational methods are as follows:
Efficiency parameters represents that energy consumption has deviation, and being not offered as centrifugal pump can not run, although also affect the effect that centrifugal pump runs,
But generally centrifugal pump will not damage.Cavitation parameter directly affects the operational effect of centrifugal pump, when cavitation drops to critical point
Time neighbouring, centrifugal pump will occur serious cavitation；When cavitation crosses critical point, centrifugal pump cannot run in theory,
So when cavitation is evaluated as zero, centrifugal pump overall score also should be zero, in order to remind user's centrifugal pump currently time the most logical
Can not run under situation.Although vibration parameters can not make pump not run at once, but the probability of malfunction that vibration parameters causes is very big,
Major part installation standard and equipment standard there is the regulation vibration parameters equipment that exceeds standard can not run at all, so should in overall score
Should be for the relation of "AND".Although temperature parameter will not make pump not run at once, but the fault that temperature causes is probably at 2 hours
In will occur at once, major part installation standard and equipment standard have the set point of temperature equipment that exceeds standard can not run at all, so
It overall score is also the relation of "AND".
For the above-mentioned reasons, final scoring formula is:
F=FE×FC×FV×FT (10)
Wherein, F is overall score, FEMark for efficiency, FCMark for cavitation, FVFor vibration scoring, FTMark for temperature,
This evaluation methodology both can individually or combination in any evaluation, it is also possible to the overall evaluation, but in order to show differentiation, respectively with 4 units
The combination of the English word of element defines its evaluation method, and wherein, efficiency (Efficiency) refers to that available power is to driving power
Ratio；Cavitation (Cavitation) refers to that the fluid flowed is due to the phenomenon reducing generation steam bubble of local pressure；Vibration
(Vibration) process that a state changes, the i.e. reciprocating motion of object are referred to；Temperature (Temperature) is to represent that object is cold and hot
The physical quantity of degree, evaluates and is just defined with the representative of 4 above English alphabets, and thoroughly evaluating is ECVT pattern,
Can also be by efficiency and cavitation (EC), vibration and temperature (VT) or only evaluate efficiency (E) and cavitation (C) etc.,
This is not construed as limiting.
The centrifugal pump operational effect decision maker that the present embodiment proposes, waterpower operational factor during by centrifugal pump is run and/or machine
Centrifugal pump operational effect is evaluated by tool operational factor, and provides the scoring of centrifugal pump operational effect, solves existing centrifugal
Pump operation effect determining method has to rely on the experience and knowledge of professional and technical personnel and need to expend the technology of a large amount of man power and material
Problem, the present embodiment propose centrifugal pump operational effect decision maker, simple to operate, greatly reduce man power and material loss,
And practicality and strong operability.
As shown in figure 11, the centrifugal pump operational effect decision-making system that the present embodiment provides, grading module 20 includes:
First acquiring unit 211, for obtaining actual flow when centrifugal pump runs and metered flow；
First computing unit 212, for according to the actual flow obtained and metered flow, calculating flow relative number；
First drawing unit 213, for according to the flow relative number calculated, draws flow relative ratio cartogram；
First fitting unit 214, for according to the flow relative ratio cartogram drawn, matching centrifugal pump equation；
First scoring unit 215, for the centrifugal pump equation according to matching, draws efficiency relative number, provides centrifugal pump operational effect
Efficiency scoring.
First acquiring unit 211 of centrifugal pump operational effect decision maker obtains actual flow Q when centrifugal pump runsSWith specified stream
Amount QE, wherein, metered flow Q when centrifugal pump runsECan be learnt by centrifugal pump nameplate data, actual flow QSPermissible
Learnt by testing flow meter.
First computing unit 212, according to the actual flow obtained and metered flow, calculates flow relative number, and flow relative number can
Calculated by following equation:
QB=QS÷QE (11)
Wherein, QBFor flow relative number (nondimensional), QSFor actual flow, unit is m3/h；QEFor metered flow, unit
For m3/h.
First drawing unit 213 is according to the flow relative number Q calculatedB, draw out flow relative ratio cartogram, such as Fig. 3 institute
Showing, wherein, metered flow being set to 1, peak efficiency relative number is set to 100%, and abscissa represents flow relative number QB, vertical seat
Mark represents efficiency relative number ηB。
First fitting unit 214 according to the flow relative ratio cartogram drawn out, matching centrifugal pump equation is:
ηB=-0.3891QB 3-0.1762QB 2+1.5531QB+0.1137 (12)
Wherein, ηBFor efficiency relative number (nondimensional), QBFor flow relative number (nondimensional).
First scoring unit 215, according to the centrifugal pump equation of matching, draws efficiency relative number ηB, and the efficiency that directly will draw
Relative number is as the scoring of efficiency, thus provides the efficiency scoring of centrifugal pump operational effect.
FE=ηB (13)
The centrifugal pump operational effect decision maker that the present embodiment proposes, according to the flow relative number calculated, draws flow and compares
Data-Statistics figure, according to the flow relative ratio cartogram drawn, matching centrifugal pump equation, according to the centrifugal pump equation of matching, obtains
Going out efficiency relative number, provide the efficiency scoring of centrifugal pump operational effect, solving existing centrifugal pump operational effect decision method must
Must rely on the experience and knowledge of professional and technical personnel and need to expend the technical problem of a large amount of man power and material, the present embodiment proposes
Centrifugal pump operational effect decision maker, simple to operate, greatly reduce the loss of man power and material and practicality and strong operability.
As shown in figure 12, the centrifugal pump operational effect decision-making system that the present embodiment provides, grading module 20 also includes:
Second acquisition unit 221, for obtaining the pressure for vaporization value that centrifugal pump is corresponding under difference runs water temperature；
Second drawing unit 222, for according to the pressure for vaporization value obtained, draws pressure for vaporization relative ratio cartogram；
Second fitting unit 223, for according to the pressure for vaporization relative ratio cartogram drawn, matching pressure for vaporization polynomial equation；
Second computing unit 224, for the pressure for vaporization polynomial equation according to matching, calculates centrifugal pump under observed temperature
Pressure for vaporization value；
3rd computing unit 225, is used for obtaining the specified net positive suction head of centrifugal pump, and according to the centrifugal pump calculated under observed temperature
Pressure for vaporization value and the specified net positive suction head of centrifugal pump of acquisition, draw centrifugal pump theory net positive suction head；
4th computing unit 226, is used for obtaining vacuum at centrifugal pump inlet, and according to vacuum at the centrifugal pump inlet obtained and
The centrifugal pump theory net positive suction head drawn, calculates vacuum ratio；
Second scoring unit 227, according to the cavitation scoring formula of the vacuum ratio calculated and setting, provides centrifugal pump operational effect
Cavitation is marked.
The second acquisition unit 221 of centrifugal pump operational effect decision maker obtains the vaporization that centrifugal pump is corresponding under difference runs water temperature
Force value, first this pressure for vaporization value is to be found by reference book, stores centrifugal pump fortune the most again by the way of numerical value inputs
In the data base of row effect decision maker, centrifugal pump operational effect decision maker obtains centrifugal pump from data base and runs water in difference
The lower corresponding pressure for vaporization value of temperature, its pressure for vaporization value is the most as shown in table 1.
Second drawing unit 222 of centrifugal pump operational effect decision maker runs in difference according to the centrifugal pump obtained in data base
Pressure for vaporization value corresponding under water temperature, draws pressure for vaporization relative ratio cartogram, the most as shown in Figure 5.
Second fitting unit 223 of centrifugal pump operational effect decision maker according to the pressure for vaporization relative ratio cartogram drawn out,
Obtaining its pressure for vaporization polynomial equation with the method matching of numerical simulation, the collated pressure for vaporization polynomial equation that obtains is:
Wherein, T is observed temperature, and unit is DEG C；PQFor the pressure for vaporization value under observed temperature, unit is Pa.
Second computing unit 224 of centrifugal pump operational effect decision maker is according to the pressure for vaporization polynomial equation of matching, Ke Yizhi
Connect pressure for vaporization value P calculating centrifugal pump under observed temperatureQ。
3rd computing unit 225 of centrifugal pump operational effect decision maker is according to the centrifugal pump nameplate specified cavitation of data acquisition centrifugal pump
Surplus NPSHE, and according to the centrifugal pump directly calculated pressure for vaporization value P under observed temperatureQSpecified with the centrifugal pump obtained
Net positive suction head NPSHE, draw centrifugal pump theory net positive suction head HL, centrifugal pump theory net positive suction head HLFor:
HL=NPSHE+PQ (15)
Wherein, NPSHEFor specified net positive suction head, unit is m；PQFor centrifugal pump pressure for vaporization value under observed temperature,
Unit is Pa；HLFor centrifugal pump theory net positive suction head, unit is m.
4th computing unit 226 of centrifugal pump operational effect decision maker obtains vacuum H at the centrifugal pump inlet of actual measurementS, and root
Vacuum H at the centrifugal pump inlet surveyed factuallySWith the centrifugal pump theory net positive suction head H drawnL, calculate vacuum and compare HB, vacuum
Compare HBFor:
HB=HS/(10.33-HL) (16)
Wherein, HBFor vacuum ratio, nondimensional；HSFor vacuum at centrifugal pump inlet, unit is m；HLTheoretical for centrifugal pump
Net positive suction head, unit is m.
Second scoring unit 227 of centrifugal pump operational effect decision maker compares H according to the vacuum calculatedBWith the cavitation scoring set
Formula, provides the cavitation scoring of centrifugal pump operational effect, and wherein, cavitation scoring formula is empirical equation, and cavitation scoring formula is:
When vacuum compares HBWhen >=1, cavitation scoring FC=0；
When vacuum compares HBWhen≤0, cavitation scoring FC=100；
As shown in Figure 6, H is compared when 0 < vacuumB< when 1,
Cavitation scoring FC=-354.41HB 4+373.96HB 3-133.22373.96HB 2+12.829HB+99.89 (17)
The centrifugal pump operational effect decision maker that the present embodiment proposes, obtains centrifugal pump specified net positive suction head, and according to calculating
Centrifugal pump pressure for vaporization value under observed temperature and the specified net positive suction head of centrifugal pump of acquisition, draw centrifugal pump theory net positive suction head；
Obtain vacuum at centrifugal pump inlet, and according to vacuum at the centrifugal pump inlet obtained and the centrifugal pump theory net positive suction head drawn,
Calculate vacuum ratio；Cavitation scoring formula according to the vacuum ratio calculated and setting, the cavitation providing centrifugal pump operational effect is commented
Point, solve existing centrifugal pump operational effect decision method and have to rely on the experience and knowledge of professional and technical personnel and need to expend
The technical problem of a large amount of man power and materials, the centrifugal pump operational effect decision maker that the present embodiment proposes, simple to operate, significantly drop
The loss of low man power and material and practicality and strong operability.
As shown in figure 13, the centrifugal pump operational effect decision-making system that the present embodiment provides, grading module 20 also includes:
3rd acquiring unit 231, for obtaining classification and the vibration class of centrifugal pump；
3rd scoring unit 232, for according to the classification obtained and vibration class and default centrifugal pump vibration evaluation criterion, giving
Go out the vibration scoring of centrifugal pump operational effect.
3rd acquiring unit 231 of centrifugal pump operational effect decision maker obtains classification and the vibration class of centrifugal pump, wherein, from
The classification of heart pump is that the center according to centrifugal pump is high and rotating speed carries out classifying, and is always divided into four classes, the most as shown in table 2.
Wherein, the center height of horizontal pump is defined as interplanar distance h (mm) by the axis of pump to the base of pump；Vertical pump is originally
Come high less than center, in order to evaluate vibration rank, take delivery side of pump flange sealing surface to height centered by the projector distance between pump shaft line.
The vibration severity level of centrifugal pump and the scope of vibration severity are as shown in table 3.
Centrifugal pump operational effect decision maker presets centrifugal pump vibration evaluation criterion, and the vibration rank of centrifugal pump is divided into A, B, C
With D level Four, wherein, D level is defective, and the vibration severity level of centrifugal pump and the other corresponding relation of vibration level are as shown in table 4.
According to the above centrifugal pump vibration evaluation criterion preset, when centrifugal pump running status is the first kind or Equations of The Second Kind and vibrates strong
Meter 100 points when degree is within 0.28, centrifugal pump running status is the 3rd class or the 4th class and meter time vibration severity is within 0.45
100 points, remaining state presses table inquiry, A level meter 75 points, B level meter 50 points, C level meter 25 points, D level meter 0 point.
The present embodiment propose centrifugal pump operational effect decision maker, according to obtain centrifugal pump classification and vibration class and preset
Centrifugal pump vibration evaluation criterion, centrifugal pump operational effect is evaluated, be given centrifugal pump operational effect vibration scoring, solve
Existing centrifugal pump operational effect decision method of having determined has to rely on the experience and knowledge of professional and technical personnel and need to expend a large amount of people
Power and the technical problem of material resources, the centrifugal pump operational effect decision maker that the present embodiment proposes, simple to operate, greatly reduce people
Power and the loss of material resources and practicality and strong operability.
As shown in figure 14, the centrifugal pump operational effect decision-making system that the present embodiment provides, grading module 20 also includes:
4th acquiring unit 241, for obtaining bearing ascending temperature when centrifugal pump runs；
4th scoring unit 242, bearing ascending temperature during for running according to the centrifugal pump obtained and default centrifugal pump temperature
Evaluation criterion, provides the temperature scoring of centrifugal pump operational effect.
4th acquiring unit 241 of centrifugal pump operational effect decision maker directly checks the temperature of bearing outer ring, obtains centrifugal pump fortune
Bearing temperature during row and the ambient temperature near bearing, and calculate bearing ascending temperature.
Set environment temperature is t ', and bearing temperature is t ", bearing ascending temperature is t, then t=t "-t '.
4th scoring unit 242 of centrifugal pump operational effect decision maker is according to the bearing ascending temperature calculated, in conjunction with preset
Centrifugal pump temperature evaluation criterion, uses by stages to judge centrifugal pump operational effect and carries out temperature scoring, temperature scoring FTFor:
When t≤20 DEG C, FT=100；
As it is shown in figure 9, when 20 DEG C≤t≤40 DEG C, FT=0.00167t3-0.341t2+10.81t+6.6 (18)
As t >=40 DEG C or t " >=80c°Time, FT=0
Wherein, formula (18) be by deep groove ball bearing, 15 ° and 30 ° of angular contact ball bearings conventional in centrifugal pump in difference
At a temperature of life-span statistical result carry out curve plotting and numerical simulation obtains.
The present embodiment propose centrifugal pump operational effect decision maker, according to obtain centrifugal pump run time bearing ascending temperature with
And the centrifugal pump temperature evaluation criterion preset, provide the temperature scoring of centrifugal pump operational effect, solve existing centrifugal pump and run
Effect determining method has to rely on the experience and knowledge of professional and technical personnel and need to expend the technical problem of a large amount of man power and material,
The centrifugal pump operational effect decision maker that the present embodiment proposes, simple to operate, greatly reduce the loss of man power and material and real
By property and strong operability.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art
For, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of being made, etc.
With replacement, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a centrifugal pump operational effect decision method, it is characterised in that include step:
Obtain waterpower operational factor when centrifugal pump runs and/or mechanical operating parameters；
According to the described waterpower operational factor obtained and/or described mechanical operating parameters and default centrifugal pump postitallation evaluation mark
Standard, is evaluated centrifugal pump operational effect, and provides the scoring of described centrifugal pump operational effect, wherein, described waterpower
Operational factor includes that efficiency parameters and/or cavitation parameter, described mechanical operating parameters include vibration parameters and/or temperature parameter.
Centrifugal pump operational effect decision method the most according to claim 1, it is characterised in that
Described efficiency parameters is efficiency relative number, described according to the described waterpower operational factor obtained and/or described mechanical movement
Parameter and default centrifugal pump postitallation evaluation standard, be evaluated centrifugal pump operational effect, and provide described centrifugal pump
The step of the scoring of operational effect includes:
Obtain actual flow when centrifugal pump runs and metered flow；
According to the described actual flow obtained and described metered flow, calculate flow relative number；
According to the described flow relative number calculated, draw flow relative ratio cartogram；
According to the described flow relative ratio cartogram drawn, matching centrifugal pump equation；
According to the described centrifugal pump equation of matching, draw described efficiency relative number, provide the effect of described centrifugal pump operational effect
Rate is marked.
Centrifugal pump operational effect decision method the most according to claim 2, it is characterised in that
Described cavitation parameter is vacuum ratio, described according to the described waterpower operational factor obtained and/or described mechanical operating parameters
And the centrifugal pump postitallation evaluation standard preset, centrifugal pump operational effect is evaluated, and provides the operation of described centrifugal pump
The step of the scoring of effect includes:
Obtain the pressure for vaporization value that centrifugal pump is corresponding under difference runs water temperature；
According to the described pressure for vaporization value obtained, draw pressure for vaporization relative ratio cartogram；
According to the described pressure for vaporization relative ratio cartogram drawn, matching pressure for vaporization polynomial equation；
According to the described pressure for vaporization polynomial equation of matching, calculate centrifugal pump pressure for vaporization value under observed temperature；
Obtain the specified net positive suction head of centrifugal pump, and according to the described centrifugal pump calculated pressure for vaporization value under observed temperature
The specified net positive suction head of described centrifugal pump with obtaining, draws centrifugal pump theory net positive suction head；
Obtain vacuum at centrifugal pump inlet, and according to vacuum at the described centrifugal pump inlet obtained and described in drawing from
Heart pump theory net positive suction head, calculates described vacuum ratio；
Cavitation scoring formula according to the described vacuum ratio calculated and setting, provides the cavitation of described centrifugal pump operational effect
Scoring.
Centrifugal pump operational effect decision method the most according to claim 3, it is characterised in that
Described vibration parameters is vibration class, the described described waterpower operational factor according to acquisition and/or described mechanical movement ginseng
Number and the centrifugal pump postitallation evaluation standard preset, be evaluated centrifugal pump operational effect, and provides described centrifugal pump fortune
The step of the scoring of row effect includes:
Obtain classification and the vibration class of centrifugal pump；
According to the described centrifugal pump classification obtained and described vibration class and default centrifugal pump vibration evaluation criterion, to from
Heart pump operation effect is evaluated, and provides the vibration scoring of described centrifugal pump operational effect.
5. according to the centrifugal pump operational effect decision method described in any one of Claims 1-4, it is characterised in that
Described temperature parameter is bearing ascending temperature, the described described waterpower operational factor according to acquisition and/or described machinery fortune
Line parameter and default centrifugal pump postitallation evaluation standard, be evaluated centrifugal pump operational effect, and is given described centrifugal
The step of the scoring of pump operation effect also includes:
Obtain bearing ascending temperature when centrifugal pump runs；
Bearing ascending temperature when running according to the described centrifugal pump obtained and default centrifugal pump temperature evaluation criterion, give
Go out the temperature scoring of described centrifugal pump operational effect.
6. a centrifugal pump operational effect decision-making system, it is characterised in that including:
Acquisition module (10), for obtaining waterpower operational factor when centrifugal pump runs and/or mechanical operating parameters；
Grading module (20), for according to the described centrifugal pump classification obtained and described vibration class and default centrifugal pump
Vibration criteria, is evaluated centrifugal pump operational effect, and provides the scoring of described centrifugal pump operational effect, wherein,
Described waterpower operational factor includes that efficiency parameters and/or cavitation parameter, described mechanical operating parameters include vibration parameters and/or temperature
Degree parameter.
Centrifugal pump operational effect decision-making system the most according to claim 6, it is characterised in that
Institute's scoring module (20) including:
First acquiring unit (211), for obtaining actual flow when centrifugal pump runs and metered flow；
First computing unit (212), for according to the described actual flow obtained and described metered flow, calculating flow
Relative number；
First drawing unit (213), for according to the described flow relative number calculated, draws flow relative ratio statistics
Figure；
First fitting unit (214), for according to the described flow relative ratio cartogram drawn, matching centrifugal pump equation；
First scoring unit (215), for the described centrifugal pump equation according to matching, draws described efficiency relative number, gives
Go out the efficiency scoring of centrifugal pump operational effect.
Centrifugal pump operational effect decision-making system the most according to claim 7, it is characterised in that
Institute's scoring module (20) also includes:
Second acquisition unit (221), for obtaining the pressure for vaporization value that centrifugal pump is corresponding under difference runs water temperature；
Second drawing unit (222), for according to the described pressure for vaporization value obtained, draws pressure for vaporization and compares primary system
Meter figure；
Second fitting unit (223), for according to the described pressure for vaporization relative ratio cartogram drawn, matching vaporization pressure
Power polynomial equation；
Second computing unit (224), for the described pressure for vaporization polynomial equation according to matching, calculates centrifugal pump and exists
Pressure for vaporization value under observed temperature；
3rd computing unit (225), is used for obtaining the specified net positive suction head of centrifugal pump, and according to the described centrifugal pump calculated
Pressure for vaporization value under observed temperature and the specified net positive suction head of described centrifugal pump of acquisition, draw more than centrifugal pump theory cavitation
Amount；
4th computing unit (226), is used for obtaining vacuum at centrifugal pump inlet, and enters according to the described centrifugal pump obtained
At Kou, vacuum and the described centrifugal pump theory net positive suction head drawn, calculate vacuum ratio；
Second scoring unit (227), according to the cavitation scoring formula of the described vacuum ratio calculated and setting, is given centrifugal
The cavitation scoring of pump operation effect.
Centrifugal pump operational effect decision-making system the most according to claim 8, it is characterised in that
Institute's scoring module (20) also includes:
3rd acquiring unit (231), for obtaining classification and the vibration class of centrifugal pump；
3rd scoring unit (232), for according to the described classification obtained and described vibration class and default centrifugal pump
Vibration criteria, provides the vibration scoring of centrifugal pump operational effect.
10. according to the centrifugal pump operational effect decision-making system described in any one of claim 6 to 9, it is characterised in that
Institute's scoring module (20) also includes:
4th acquiring unit (241), for obtaining bearing ascending temperature when centrifugal pump runs；
4th scoring unit (242), is used for bearing ascending temperature when running according to the described centrifugal pump obtained and presets
Centrifugal pump temperature evaluation criterion, be given described centrifugal pump operational effect temperature scoring.
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| CN108182503A (en) * | 2017-09-30 | 2018-06-19 | 上海众深科技股份有限公司 | A kind of quality evaluating method and its equipment of industrial centrifugal pump |
| CN108916076A (en) * | 2018-07-13 | 2018-11-30 | 扬州大学 | A kind of large and medium-sized low lift vertical water pump set state evaluation method based on multi-parameter |
| CN109960780A (en) * | 2019-03-18 | 2019-07-02 | 湘潭大学 | A kind of evaluation system and evaluation method of pump economical operation performance and stable state |
| CN110259702A (en) * | 2019-06-17 | 2019-09-20 | 天长市远安机械有限公司 | A kind of centrifugal pump operational effect determination method |
| CN110821849A (en) * | 2019-12-03 | 2020-02-21 | 湖南凯利特泵业有限公司 | Cavitation monitoring method for fire pump |
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| CN110821849B (en) * | 2019-12-03 | 2020-10-30 | 湖南凯利特泵业有限公司 | Cavitation monitoring method for fire pump |
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