CN110259702A - A kind of centrifugal pump operational effect determination method - Google Patents
A kind of centrifugal pump operational effect determination method Download PDFInfo
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- CN110259702A CN110259702A CN201910523671.9A CN201910523671A CN110259702A CN 110259702 A CN110259702 A CN 110259702A CN 201910523671 A CN201910523671 A CN 201910523671A CN 110259702 A CN110259702 A CN 110259702A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
Abstract
The present invention relates to centrifugal pump operational monitorings, more particularly to a kind of centrifugal pump operational effect determination method, obtain waterpower operating parameter when centrifugation pump operation, mechanical operating parameters, according to the waterpower operating parameter of acquisition, mechanical operating parameters and preset centrifugal pump postitallation evaluation standard, the operational effect of centrifugal pump is evaluated, in the input end of centrifugal pump or the circumferential equally distributed pressure fluctuation monitoring point of outlet end arrangement, to extract the fluctuation pressure data after impeller rotates several circles, carry out pressure fluctuation frequency-domain analysis, and extract the corresponding phase difference of characteristic frequency, calculate the actual circumferential angle in each pressure fluctuation monitoring point, average correlation coefficient is found out according to phase difference and circumferential angle, the revolving speed and valve opening of centrifugal pump are adjusted according to average correlation coefficient；Technical solution provided by the invention can effectively overcome intelligent management degree present in the prior art is lower, can not limit car owner to escape defect that is single, occupying more Urban Public Space.
Description
Technical field
The present invention relates to centrifugal pump operational monitorings, and in particular to a kind of centrifugal pump operational effect determination method.
Background technique
Centrifugal pump is not only widely used in the production and living of people as a kind of universal machine, and is also that industry is raw
Big power consumer in production, the whole nation has 1/4 electric energy to be all used on driving centrifugal pump, therefore the judgement of centrifugal pump operational effect is aobvious
It obtains particularly important.But centrifugal pump operational effect determination method in the prior art is because be related to all multi-parameters, be related to from
The every aspect of heart pump operation and using effect, such as vibration, noise, temperature, efficiency, axial force, radial force, power, torque
With revolving speed etc., the technical team that more comprehensive evaluation must very professional is carried out to a centrifugal pump can just accomplish, singly
A technical staff is difficult have so comprehensive cognition, and needs to examine using a large amount of valuable centrifugal pumps when centrifugal pump thoroughly evaluating
Measurement equipment is detected.It follows that existing centrifugal pump operational effect determination method must rely on professional technician's
Experience and knowledge and a large amount of man power and material need to be expended.
With the development of science and technology, the reliability operation of pump is increasingly paid attention to.To the adjusting of pump in engineer application,
The watt level of pump operation is paid close attention to, that is, must also avoid pump from running under unstable period while pumping " energy conservation ".
This unstable period occurs in monitoring pump can be measured by PIV or pressure fluctuation.PIV technical costs is higher,
Period is longer, is unfavorable for the application of engineering, therefore carry out pressure fluctuation measurement to pump to become mainstream.Currently, to upper pressure arteries and veins is pumped
Dynamic research is concentrated mainly on time domain and frequency domain, and it is more difficult to capture certain features.
Summary of the invention
(1) the technical issues of solving
For disadvantages mentioned above present in the prior art, the present invention provides a kind of centrifugal pump operational effect determination method,
Can effectively overcome can not preferably determine pump operation effect present in the prior art, cannot be carried out to pump operation operating condition
Optimization, the unpredictable defect for pumping service life.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs:
A kind of centrifugal pump operational effect determination method, comprising the following steps:
Waterpower operating parameter, mechanical operating parameters when S1, acquisition centrifugation pump operation；
S2, according to the waterpower operating parameter of acquisition, mechanical operating parameters and preset centrifugal pump postitallation evaluation standard, it is right
The operational effect of centrifugal pump is evaluated；
S3, circumferential equally distributed pressure fluctuation monitoring point is arranged in the input end of centrifugal pump or outlet end, to extract leaf
Wheel rotates the fluctuation pressure data after several circles；
S4, pressure fluctuation frequency-domain analysis is carried out, and extracts the corresponding phase difference of characteristic frequency, calculate each pressure fluctuation monitoring
The actual circumferential angle of point；
S5, according in S4 phase difference and circumferential angle find out average correlation coefficient, according to average correlation coefficient adjust from
The revolving speed and valve opening of heart pump repeat S4, S5 until centrifugal pump stable conditions；
S6, using characteristic curve of centrifugal pump as centrifugal pump burn-out life evaluation index, by pre- in centrifugal pump remaining life
It surveys monitoring point and corresponding sensor is set, draw out the characteristic curve in centrifugal pump operational process；
S7, according to the characteristic curve variation tendency in S6, centrifugal pump remaining life is predicted.
Preferably, described in S4 carry out pressure fluctuation frequency-domain analysis, and extract the corresponding phase difference of characteristic frequency include: by
After fluctuation pressure data carry out dimensionless processing, then Fast Fourier Transform (FFT) is carried out, draws out each pressure fluctuation monitoring to solve
The frequency domain figure of point, and then the corresponding characteristic frequency in each pressure fluctuation monitoring point is found out, and selection any feature frequency is corresponding each
The phase of pressure fluctuation monitoring point sets a phase starting point, draws phase difference of remaining each point compared with the phase starting point.
Preferably, the actual circumferential angle of each pressure fluctuation monitoring point of calculating described in S4 includes: to draw each pressure in S3
The pulsation actual circumferential position in monitoring point, the circumferential starting point of setting one, draws circumferential angle of remaining each point compared with the circumferential direction starting point
Degree.
Preferably, the monitoring point of centrifugal pump predicting residual useful life described in S6 is pressure monitoring point and flow monitoring point, described
Pressure monitoring point is that manometry negative pressure value is arranged at centrifugal pump inlet end, and manometry is being arranged just at outlet of centrifugal pump end
Pressure value；The flow monitoring point is that flowmeter is arranged on outlet of centrifugal pump end, measures centrifugal pump water flow.
Preferably, characteristic curve of centrifugal pump described in S6 is Centrifugal Pump-head curve and efficiency-flow curve, root
According to the deviation size that two curves occur in its operating point, determine whether centrifugal pump breaks down or fail.
Preferably, waterpower operating parameter described in S1 includes efficiency parameters, cavitation parameter, and the mechanical operating parameters include
Vibration parameters, temperature parameter.
Preferably, carrying out evaluation according to operational effect of the efficiency parameters to centrifugal pump includes: to obtain centrifugation pump operation
Actual flow and metered flow, and calculate outflow relative number；According to calculated flow relative number, draws flow and compare
Data-Statistics figure；According to the flow relative ratio statistical chart of drafting, it is fitted centrifugal pump equation, and obtains efficiency relative number, according to effect
Rate relative number evaluates centrifugal pump operational effect.
Preferably, carrying out evaluation according to operational effect of the cavitation parameter to centrifugal pump includes: to obtain centrifugal pump not
With corresponding pressure for vaporization value under operation water temperature, and draw pressure for vaporization relative ratio statistical chart；According to the pressure for vaporization of drafting
Relative ratio statistical chart is fitted pressure for vaporization polynomial equation, and calculates pressure for vaporization value of the centrifugal pump under observed temperature；
The specified net positive suction head of centrifugal pump is obtained, and according to pressure for vaporization value and specified net positive suction head, obtains centrifugal pump theory net positive suction head；
It obtains centrifugal pump inlet end vacuum degree and vacuum ratio is calculated according to input end vacuum degree and centrifugal pump theory net positive suction head；According to
Vacuum compares centrifugal pump operational effect and is evaluated.
Preferably, carrying out evaluation according to operational effect of the vibration parameters to centrifugal pump includes: to obtain the class of centrifugal pump
Centrifugal pump operational effect is not evaluated according to preset centrifugal pump vibration evaluation criterion with vibration class.
Preferably, carrying out evaluation according to operational effect of the temperature parameter to centrifugal pump includes: to obtain centrifugation pump operation
When bearing ascending temperature；According to preset centrifugation pump temperature evaluation criterion, centrifugal pump operational effect is evaluated.
(3) beneficial effect
Compared with prior art, a kind of centrifugal pump operational effect determination method provided by the present invention has below beneficial to effect
Fruit:
(1) waterpower operating parameter, the mechanical operating parameters when being centrifuged pump operation are obtained, is run and is joined according to the waterpower of acquisition
Number, mechanical operating parameters and preset centrifugal pump postitallation evaluation standard, evaluate the operational effect of centrifugal pump, can be right
Centrifugal pump operational effect carries out comprehensive and accurate evaluation, and greatly reduces the loss of man power and material, practicability and operation
Property is strong；
(2) in the input end of centrifugal pump or the circumferential equally distributed pressure fluctuation monitoring point of outlet end arrangement, to extract leaf
Wheel rotates the fluctuation pressure data after several circles, carries out pressure fluctuation frequency-domain analysis, and extract the corresponding phase difference of characteristic frequency,
The actual circumferential angle in each pressure fluctuation monitoring point is calculated, average correlation coefficient, foundation are found out according to phase difference and circumferential angle
Average correlation coefficient adjusts the revolving speed and valve opening of centrifugal pump, can guarantee that centrifugal pump is in optimal working condition always；
(3) using characteristic curve of centrifugal pump as centrifugal pump burn-out life evaluation index, by pre- in centrifugal pump remaining life
It surveys monitoring point and corresponding sensor is set, draw out the characteristic curve in centrifugal pump operational process, become according to characteristic curve variation
Gesture predicts centrifugal pump remaining life, and using performance of centrifugal pump as life appraisal index, generally investigation performance of centrifugal pump is lost
Timing node is imitated, realizes the Accurate Prediction to the centrifugal pump service life.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.It should be evident that the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the method for the present invention flow diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
A kind of centrifugal pump operational effect determination method, as shown in Figure 1, comprising the following steps:
Waterpower operating parameter, mechanical operating parameters when S1, acquisition centrifugation pump operation；
S2, according to the waterpower operating parameter of acquisition, mechanical operating parameters and preset centrifugal pump postitallation evaluation standard, it is right
The operational effect of centrifugal pump is evaluated；
S3, circumferential equally distributed pressure fluctuation monitoring point is arranged in the input end of centrifugal pump or outlet end, to extract leaf
Wheel rotates the fluctuation pressure data after several circles；
S4, pressure fluctuation frequency-domain analysis is carried out, and extracts the corresponding phase difference of characteristic frequency, calculate each pressure fluctuation monitoring
The actual circumferential angle of point；
S5, according in S4 phase difference and circumferential angle find out average correlation coefficient, according to average correlation coefficient adjust from
The revolving speed and valve opening of heart pump repeat S4, S5 until centrifugal pump stable conditions；
S6, using characteristic curve of centrifugal pump as centrifugal pump burn-out life evaluation index, by pre- in centrifugal pump remaining life
It surveys monitoring point and corresponding sensor is set, draw out the characteristic curve in centrifugal pump operational process；
S7, according to the characteristic curve variation tendency in S6, centrifugal pump remaining life is predicted.
Pressure fluctuation frequency-domain analysis is carried out in S4, and extracting the corresponding phase difference of characteristic frequency includes: by fluctuation pressure number
After carrying out dimensionless processing, then Fast Fourier Transform (FFT) is carried out, to solve the frequency domain figure for drawing out each pressure fluctuation monitoring point,
And then the corresponding characteristic frequency in each pressure fluctuation monitoring point is found out, and selection any feature frequency corresponds to each pressure fluctuation monitoring
The phase of point sets a phase starting point, draws phase difference of remaining each point compared with the phase starting point.
It includes: to draw each pressure fluctuation monitoring point reality in S3 that the actual circumferential angle in each pressure fluctuation monitoring point is calculated in S4
The circumferential position on border, the circumferential starting point of setting one, draws circumferential angle of remaining each point compared with the circumferential direction starting point.
Centrifugal pump predicting residual useful life monitoring point is pressure monitoring point and flow monitoring point in S6, pressure monitoring point be from
Manometry negative pressure value is arranged in heart pump input end, and manometry positive pressure value is arranged at outlet of centrifugal pump end；Flow monitoring point
It is that flowmeter is set on outlet of centrifugal pump end, measures centrifugal pump water flow.
Characteristic curve of centrifugal pump is Centrifugal Pump-head curve and efficiency-flow curve in S6, is existed according to two curves
The deviation size that its operating point occurs, determines whether centrifugal pump breaks down or fail.
Waterpower operating parameter includes efficiency parameters, cavitation parameter in S1, and mechanical operating parameters include vibration parameters, temperature ginseng
Number.
According to operational effect of the efficiency parameters to centrifugal pump carry out evaluation include: obtain centrifugation pump operation actual flow and
Metered flow, and calculate outflow relative number；According to calculated flow relative number, flow relative ratio statistical chart is drawn；Root
According to the flow relative ratio statistical chart of drafting, be fitted centrifugal pump equation, and obtain efficiency relative number, according to efficiency relative number to from
Heart pump operational effect is evaluated.
Carrying out evaluation according to operational effect of the cavitation parameter to centrifugal pump includes: to obtain centrifugal pump under different operation water temperatures
Corresponding pressure for vaporization value, and draw pressure for vaporization relative ratio statistical chart；It is counted according to the pressure for vaporization relative ratio of drafting
Figure is fitted pressure for vaporization polynomial equation, and calculates pressure for vaporization value of the centrifugal pump under observed temperature；Obtain centrifugal pump volume
Determine net positive suction head, and according to pressure for vaporization value and specified net positive suction head, obtains centrifugal pump theory net positive suction head；Obtain centrifugal pump into
Mouth end vacuum degree calculates vacuum ratio according to input end vacuum degree and centrifugal pump theory net positive suction head；It is compared and is centrifuged according to vacuum
Pump operation effect is evaluated.
Carrying out evaluation according to operational effect of the vibration parameters to centrifugal pump includes: to obtain classification and the vibration etc. of centrifugal pump
Grade, according to preset centrifugal pump vibration evaluation criterion, evaluates centrifugal pump operational effect.
Carrying out evaluation according to operational effect of the temperature parameter to centrifugal pump includes: that bearing when obtaining centrifugation pump operation rises
Temperature；According to preset centrifugation pump temperature evaluation criterion, centrifugal pump operational effect is evaluated.
In the input end of centrifugal pump or the circumferential equally distributed pressure fluctuation monitoring point of outlet end arrangement, to extract impeller rotation
Fluctuation pressure data after turning several circles carry out pressure fluctuation frequency-domain analysis, and extract the corresponding phase difference of characteristic frequency, calculate
The actual circumferential angle in each pressure fluctuation monitoring point, finds out average correlation coefficient according to phase difference and circumferential angle, according to average
Related coefficient adjusts the revolving speed and valve opening of centrifugal pump, can guarantee that centrifugal pump is in optimal working condition always.
Carry out pressure fluctuation frequency-domain analysis, and extract the corresponding phase difference of characteristic frequency include: by fluctuation pressure data into
After the processing of row dimensionless, then Fast Fourier Transform (FFT) is carried out, to solve the frequency domain figure for drawing out each pressure fluctuation monitoring point, in turn
The corresponding characteristic frequency in each pressure fluctuation monitoring point is found out, and selection any feature frequency corresponds to each pressure fluctuation monitoring point
Phase sets a phase starting point, draws phase difference of remaining each point compared with the phase starting point.
Calculating the actual circumferential angle in each pressure fluctuation monitoring point includes: that draw each pressure fluctuation monitoring point in S3 actual
Circumferential position, the circumferential starting point of setting one, draws circumferential angle of remaining each point compared with the circumferential direction starting point.
Using characteristic curve of centrifugal pump as centrifugal pump burn-out life evaluation index, by being supervised in centrifugal pump predicting residual useful life
Corresponding sensor is arranged in measuring point, draws out the characteristic curve in centrifugal pump operational process, right according to characteristic curve variation tendency
Centrifugal pump remaining life is predicted, using performance of centrifugal pump as life appraisal index, when generally investigation performance of centrifugal pump fails
Intermediate node realizes the Accurate Prediction to the centrifugal pump service life.
Centrifugal pump predicting residual useful life monitoring point is pressure monitoring point and flow monitoring point, and pressure monitoring point is in centrifugal pump
Manometry negative pressure value is arranged in input end, and manometry positive pressure value is arranged at outlet of centrifugal pump end；Flow monitoring point be
Flowmeter is set on outlet of centrifugal pump end, measures centrifugal pump water flow.
Characteristic curve of centrifugal pump is Centrifugal Pump-head curve and efficiency-flow curve, according to two curves in its work
Make the deviation size that point occurs, determines whether centrifugal pump breaks down or fail.
Waterpower operating parameter, the mechanical operating parameters when being centrifuged pump operation are obtained, according to the waterpower operating parameter of acquisition, machine
Tool operating parameter and preset centrifugal pump postitallation evaluation standard, evaluate the operational effect of centrifugal pump, can be to centrifugation
Pump operation effect carries out comprehensive and accurate evaluation, and greatly reduces the loss of man power and material, practicability and strong operability.
Waterpower operating parameter includes efficiency parameters, cavitation parameter, and mechanical operating parameters include vibration parameters, temperature parameter.
According to operational effect of the efficiency parameters to centrifugal pump carry out evaluation include: obtain centrifugation pump operation actual flow and
Metered flow, and calculate outflow relative number；According to calculated flow relative number, flow relative ratio statistical chart is drawn；Root
According to the flow relative ratio statistical chart of drafting, be fitted centrifugal pump equation, and obtain efficiency relative number, according to efficiency relative number to from
Heart pump operational effect is evaluated.
Carrying out evaluation according to operational effect of the cavitation parameter to centrifugal pump includes: to obtain centrifugal pump under different operation water temperatures
Corresponding pressure for vaporization value, and draw pressure for vaporization relative ratio statistical chart；It is counted according to the pressure for vaporization relative ratio of drafting
Figure is fitted pressure for vaporization polynomial equation, and calculates pressure for vaporization value of the centrifugal pump under observed temperature；Obtain centrifugal pump volume
Determine net positive suction head, and according to pressure for vaporization value and specified net positive suction head, obtains centrifugal pump theory net positive suction head；Obtain centrifugal pump into
Mouth end vacuum degree calculates vacuum ratio according to input end vacuum degree and centrifugal pump theory net positive suction head；It is compared and is centrifuged according to vacuum
Pump operation effect is evaluated.
Carrying out evaluation according to operational effect of the vibration parameters to centrifugal pump includes: to obtain classification and the vibration etc. of centrifugal pump
Grade, according to preset centrifugal pump vibration evaluation criterion, evaluates centrifugal pump operational effect.
Carrying out evaluation according to operational effect of the temperature parameter to centrifugal pump includes: that bearing when obtaining centrifugation pump operation rises
Temperature；According to preset centrifugation pump temperature evaluation criterion, centrifugal pump operational effect is evaluated.
A kind of centrifugal pump operational effect determination method provided by the present invention has the advantages that
(1) waterpower operating parameter, the mechanical operating parameters when being centrifuged pump operation are obtained, is run and is joined according to the waterpower of acquisition
Number, mechanical operating parameters and preset centrifugal pump postitallation evaluation standard, evaluate the operational effect of centrifugal pump, can be right
Centrifugal pump operational effect carries out comprehensive and accurate evaluation, and greatly reduces the loss of man power and material, practicability and operation
Property is strong；
(2) in the input end of centrifugal pump or the circumferential equally distributed pressure fluctuation monitoring point of outlet end arrangement, to extract leaf
Wheel rotates the fluctuation pressure data after several circles, carries out pressure fluctuation frequency-domain analysis, and extract the corresponding phase difference of characteristic frequency,
The actual circumferential angle in each pressure fluctuation monitoring point is calculated, average correlation coefficient, foundation are found out according to phase difference and circumferential angle
Average correlation coefficient adjusts the revolving speed and valve opening of centrifugal pump, can guarantee that centrifugal pump is in optimal working condition always；
(3) using characteristic curve of centrifugal pump as centrifugal pump burn-out life evaluation index, by pre- in centrifugal pump remaining life
It surveys monitoring point and corresponding sensor is set, draw out the characteristic curve in centrifugal pump operational process, become according to characteristic curve variation
Gesture predicts centrifugal pump remaining life, and using performance of centrifugal pump as life appraisal index, generally investigation performance of centrifugal pump is lost
Timing node is imitated, realizes the Accurate Prediction to the centrifugal pump service life.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, can't be such that the essence of corresponding technical solution departs from the spirit and scope of the technical scheme of various embodiments of the present invention.
Claims (10)
1. a kind of centrifugal pump operational effect determination method, it is characterised in that: the following steps are included:
Waterpower operating parameter, mechanical operating parameters when S1, acquisition centrifugation pump operation；
S2, according to the waterpower operating parameter of acquisition, mechanical operating parameters and preset centrifugal pump postitallation evaluation standard, to centrifugation
The operational effect of pump is evaluated；
S3, circumferential equally distributed pressure fluctuation monitoring point is arranged in the input end of centrifugal pump or outlet end, to extract impeller rotation
Fluctuation pressure data after turning several circles；
S4, pressure fluctuation frequency-domain analysis is carried out, and extracts the corresponding phase difference of characteristic frequency, it is real to calculate each pressure fluctuation monitoring point
The circumferential angle on border；
S5, according in S4 phase difference and circumferential angle find out average correlation coefficient, adjust centrifugal pump according to average correlation coefficient
Revolving speed and valve opening, repeat S4, S5 until centrifugal pump stable conditions；
S6, using characteristic curve of centrifugal pump as centrifugal pump burn-out life evaluation index, by being supervised in centrifugal pump predicting residual useful life
Corresponding sensor is arranged in measuring point, draws out the characteristic curve in centrifugal pump operational process；
S7, according to the characteristic curve variation tendency in S6, centrifugal pump remaining life is predicted.
2. centrifugal pump operational effect determination method according to claim 1, it is characterised in that: carry out pressure arteries and veins described in S4
Dynamic frequency-domain analysis, and extract the corresponding phase difference of characteristic frequency and include: after fluctuation pressure data are carried out dimensionless processing, then into
Row Fast Fourier Transform (FFT) to solve the frequency domain figure for drawing out each pressure fluctuation monitoring point, and then finds out each pressure fluctuation monitoring
The corresponding characteristic frequency of point, and selection any feature frequency correspond to the phase of each pressure fluctuation monitoring point, and one phase of setting rises
Initial point draws phase difference of remaining each point compared with the phase starting point.
3. centrifugal pump operational effect determination method according to claim 1, it is characterised in that: each pressure of calculating described in S4
The actual circumferential angle in pulsation monitoring point includes: to draw each actual circumferential position in pressure fluctuation monitoring point in S3, is set one week
To starting point, circumferential angle of remaining each point compared with the circumferential direction starting point is drawn.
4. centrifugal pump operational effect determination method according to claim 1, it is characterised in that: centrifugal pump described in S6 is remaining
Life prediction monitoring point is pressure monitoring point and flow monitoring point, and the pressure monitoring point is that pressure is arranged at centrifugal pump inlet end
Manometry positive pressure value is arranged at outlet of centrifugal pump end in meter measurement negative pressure value；The flow monitoring point is in outlet of centrifugal pump
Flowmeter is set on end, measures centrifugal pump water flow.
5. centrifugal pump operational effect determination method according to claim 1, it is characterised in that: Characteristics of Centrifugal Pump described in S6
Curve is Centrifugal Pump-head curve and efficiency-flow curve, and the deviation occurred according to two curves in its operating point is big
It is small, determine whether centrifugal pump breaks down or fail.
6. centrifugal pump operational effect determination method according to claim 1, it is characterised in that: the operation ginseng of waterpower described in S1
Number includes efficiency parameters, cavitation parameter, and the mechanical operating parameters include vibration parameters, temperature parameter.
7. centrifugal pump operational effect determination method according to claim 6, it is characterised in that: according to the efficiency parameters pair
It includes: the actual flow and metered flow for obtaining centrifugation pump operation that the operational effect of centrifugal pump, which carries out evaluation, and calculates outflow
Relative number；According to calculated flow relative number, flow relative ratio statistical chart is drawn；It is compared primary system according to the flow of drafting
Meter figure, is fitted centrifugal pump equation, and obtain efficiency relative number, is evaluated according to efficiency relative number centrifugal pump operational effect.
8. centrifugal pump operational effect determination method according to claim 6, it is characterised in that: according to the cavitation parameter pair
It includes: to obtain centrifugal pump corresponding pressure for vaporization value under different operation water temperatures, and draw that the operational effect of centrifugal pump, which carries out evaluation,
Pressure for vaporization relative ratio statistical chart processed；According to the pressure for vaporization relative ratio statistical chart of drafting, it is fitted pressure for vaporization multinomial
Equation, and calculate pressure for vaporization value of the centrifugal pump under observed temperature；The specified net positive suction head of centrifugal pump is obtained, and according to vaporization
Pressure value and specified net positive suction head obtain centrifugal pump theory net positive suction head；Centrifugal pump inlet end vacuum degree is obtained, according to input end
Vacuum degree and centrifugal pump theory net positive suction head, calculate vacuum ratio；Centrifugal pump operational effect is compared according to vacuum to be evaluated.
9. centrifugal pump operational effect determination method according to claim 6, it is characterised in that: according to the vibration parameters pair
It includes: to obtain the classification and vibration class of centrifugal pump that the operational effect of centrifugal pump, which carries out evaluation, according to preset centrifugal pump vibration
Evaluation criterion evaluates centrifugal pump operational effect.
10. centrifugal pump operational effect determination method according to claim 6, it is characterised in that: according to the temperature parameter
Carrying out evaluation to the operational effect of centrifugal pump includes: bearing ascending temperature when obtaining centrifugation pump operation；According to preset centrifugation
Pump temperature evaluation criterion evaluates centrifugal pump operational effect.
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| CN117536891A (en) * | 2023-12-25 | 2024-02-09 | 犇流泵业科技(嘉兴)股份有限公司 | Parameter optimization method and system for magnetic suspension type magnetic drive centrifugal pump |
| CN117536891B (en) * | 2023-12-25 | 2024-04-09 | 犇流泵业科技(嘉兴)股份有限公司 | Parameter optimization method and system for magnetic suspension type magnetic drive centrifugal pump |
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