CN108825520A - A kind of energy-efficient application method of centrifugal water pump - Google Patents
A kind of energy-efficient application method of centrifugal water pump Download PDFInfo
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- CN108825520A CN108825520A CN201810421656.9A CN201810421656A CN108825520A CN 108825520 A CN108825520 A CN 108825520A CN 201810421656 A CN201810421656 A CN 201810421656A CN 108825520 A CN108825520 A CN 108825520A
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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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Abstract
The invention belongs to a kind of energy-efficient application methods of centrifugal water pump, it is characterised in that work step is as follows：A. DATA REASONING is carried out to centrifugal water pump；B. the measurement data being related in step a is calculated；C. centrifugal water pump is transformed according to the data calculated in b；D. it is tested after the transformation in step c in centrifugal water pump；E. the centrifugal water pump after being modified is being put into production use after step d test.
Description
Technical field
The invention belongs to viscose rayon production fields, and in particular to a kind of energy-efficient application method of centrifugal water pump.
Background technique
Centrifugal water pump energy-saving field, water pump multidrop continuous detection method, establishes simulated properties curve graph, and changed
It makes.
Renovation technique in the prior art is that impeller theoretical calculates cutting technology, disadvantage is that cannot correctly obtain
Centrifugal water the way causes flow, lift, power synchronous to reduce, and actual operating efficiency might not improve, energy conservation effect
Fruit is not significant, while in water pump valve regulation technology, being reached using valve regulated control flow, lift, which reduces centrifugal water pump, is transported
The purpose of row power, disadvantage is that the inadequate bring resistance of ducting loss of valve opening increases.
Summary of the invention
In view of the deficiency of the prior art, the present invention provides a kind of energy-efficient application methods of centrifugal water pump.
A kind of energy-efficient application method of centrifugal water pump, it is characterised in that work step is as follows：
A. DATA REASONING is carried out to centrifugal water pump；
B. the measurement data being related in step a is calculated；
C. centrifugal water pump is transformed according to the data calculated in b；
D. it is tested after the transformation in step c in centrifugal water pump；
E. the centrifugal water pump after being modified is being put into production use after step d test.
DATA REASONING involved in the step a is：It is real that centrifugal water pump discharge is measured by hand-held ultrasonic flowmeter
Border flow Q, delivery gauge measure the practical lift H of water pump, and clamp on amperemeter measures motor operation and turns actual current I and voltage U.
The calculating being related in the step b is as follows：
(1) motor active-power P it is active=U*I*1.732* φ, wherein U be voltage, unit v, I are electric current, and unit is
A, φ are power of motor factor, in the range of 0.85-0.9；
(2) the active * η electricity of output power of motor P output=P, wherein the range of η electricity is 0.93-0.97；
(3) centrifugal water pump shaft power P axis=P output * η transmission；According to kind of drive difference, different transmissions is taken to imitate
Rate, pipeline pump transmission efficiency η transmission=1, remaining shaft coupling transmission efficiency is between 0.97-0.99.
(4) effectively=(Q*H*9.81)/3600, wherein Q is pump capacity, unit m to centrifugal water pump effective power P3/
H, H are pump head, and unit m, η pump is pump efficiency；
(5) centrifugal water pump efficiency eta pump=P effectively/P axis.
The centrifugal pump remodeling method being related in the step c includes：Reduce flowage friction loss, reduce impact loss,
The energy conservation measure of the energy conservation measure of Impeller trim and centrifugal pump speed regulation.
The measure for reducing flowage friction loss：It is right including the use of in the external coating coating of overcurrent element or japanning
Impeller cover and pump housing rough surface are polished with grinding wheel.
The measure for reducing impact loss：Blade is made the twisted blade with space curved surface shape.
The energy conservation measure of the Impeller trim：Before being cut in the maximum cutting surplus allowed band of impeller to impeller
Afterwards.
The energy conservation measure of the centrifugal pump speed regulation：Change its flow, lift and shaft power using the method for changing revolving speed.
Beneficial effects of the present invention：
1. the present invention can correctly obtain centrifugal water the way, flow, lift, power is caused to increase, it is practical to transport
Line efficiency simultaneously improves, and energy-saving effect is significant.
2. the present invention improves centrifugal water the way, so that centrifugal water pump increases flow on unit work consumptiom.
3. between operating in high efficient area the invention enables centrifugal water pump, realizing significant energy-saving effect.
Detailed description of the invention
Fig. 1 is the working state schematic representation of centrifugal pump in the present invention；
Fig. 2 is the efficient operating regime schematic diagram of centrifugal pump in the present invention；
Fig. 3 is Centrifugal Pump-lift-efficiency characteristic curve graph in the present invention.
Specific embodiment：
Embodiment 1：
A kind of energy-efficient application method of centrifugal water pump, it is characterised in that work step is as follows：
A. DATA REASONING is carried out to centrifugal water pump；
B. the measurement data being related in step a is calculated；
C. centrifugal water pump is transformed according to the data calculated in b；
D. it is tested after the transformation in step c in centrifugal water pump；
E. the centrifugal water pump after being modified is being put into production use after step d test.
Embodiment 2：
A kind of energy-efficient application method of centrifugal water pump, it is characterised in that work step is as follows：
A. DATA REASONING is carried out to centrifugal water pump；
B. the measurement data being related in step a is calculated；
C. centrifugal water pump is transformed according to the data calculated in b；
D. it is tested after the transformation in step c in centrifugal water pump；
E. the centrifugal water pump after being modified is being put into production use after step d test.
DATA REASONING involved in the step a is：It is real that centrifugal water pump discharge is measured by hand-held ultrasonic flowmeter
Border flow Q, delivery gauge measure the practical lift H of water pump, and clamp on amperemeter measures motor operation and turns actual current I and voltage U.
Embodiment 3：
A kind of energy-efficient application method of centrifugal water pump, it is characterised in that work step is as follows：
A. DATA REASONING is carried out to centrifugal water pump；
B. the measurement data being related in step a is calculated；
C. centrifugal water pump is transformed according to the data calculated in b；
D. it is tested after the transformation in step c in centrifugal water pump；
E. the centrifugal water pump after being modified is being put into production use after step d test.
DATA REASONING involved in the step a is：It is real that centrifugal water pump discharge is measured by hand-held ultrasonic flowmeter
Border flow Q, delivery gauge measure the practical lift H of water pump, and clamp on amperemeter measures motor operation and turns actual current I and voltage U.
The calculating being related in the step b is as follows：
(1) motor active-power P it is active=U*I*1.732* φ, wherein U be voltage, unit v, I are electric current, and unit is
A, φ are power of motor factor, in the range of 0.85-0.9；
(3) the active * η electricity of output power of motor P output=P, wherein the range of η electricity is 0.93-0.97；
(3) centrifugal water pump shaft power P axis=P output * η transmission；According to kind of drive difference, different transmissions is taken to imitate
Rate, pipeline pump transmission efficiency η transmission=1, remaining shaft coupling transmission efficiency is between 0.97-0.99.
(4) effectively=(Q*H*9.81)/3600, wherein Q is pump capacity, unit m to centrifugal water pump effective power P3/
H, H are pump head, and unit m, η pump is pump efficiency；
(5) centrifugal water pump efficiency eta pump=P effectively/P axis.
Embodiment 4：
A kind of energy-efficient application method of centrifugal water pump, it is characterised in that work step is as follows：
A. DATA REASONING is carried out to centrifugal water pump；
B. the measurement data being related in step a is calculated；
C. centrifugal water pump is transformed according to the data calculated in b；
D. it is tested after the transformation in step c in centrifugal water pump；
E. the centrifugal water pump after being modified is being put into production use after step d test.
DATA REASONING involved in the step a is：It is real that centrifugal water pump discharge is measured by hand-held ultrasonic flowmeter
Border flow Q, delivery gauge measure the practical lift H of water pump, and clamp on amperemeter measures motor operation and turns actual current I and voltage U.
The calculating being related in the step b is as follows：
(1) motor active-power P it is active=U*I*1.732* φ, wherein U be voltage, unit v, I are electric current, and unit is
A, φ are power of motor factor, in the range of 0.85-0.9；
(4) the active * η electricity of output power of motor P output=P, wherein the range of η electricity is 0.93-0.97；
(3) centrifugal water pump shaft power P axis=P output * η transmission；According to kind of drive difference, different transmissions is taken to imitate
Rate, pipeline pump transmission efficiency η transmission=1, remaining shaft coupling transmission efficiency is between 0.97-0.99.
(4) effectively=(Q*H*9.81)/3600, wherein Q is pump capacity, unit m to centrifugal water pump effective power P3/
H, H are pump head, and unit m, η pump is pump efficiency；
(5) centrifugal water pump efficiency eta pump=P effectively/P axis.
The centrifugal pump remodeling method being related in the step c includes：Reduce flowage friction loss, reduce impact loss,
The energy conservation measure of the energy conservation measure of Impeller trim and centrifugal pump speed regulation.
Embodiment 5：
A kind of energy-efficient application method of centrifugal water pump, it is characterised in that work step is as follows：
A. DATA REASONING is carried out to centrifugal water pump；
B. the measurement data being related in step a is calculated；
C. centrifugal water pump is transformed according to the data calculated in b；
D. it is tested after the transformation in step c in centrifugal water pump；
E. the centrifugal water pump after being modified is being put into production use after step d test.
DATA REASONING involved in the step a is：It is real that centrifugal water pump discharge is measured by hand-held ultrasonic flowmeter
Border flow Q, delivery gauge measure the practical lift H of water pump, and clamp on amperemeter measures motor operation and turns actual current I and voltage U.
The calculating being related in the step b is as follows：
(1) motor active-power P it is active=U*I*1.732* φ, wherein U be voltage, unit v, I are electric current, and unit is
A, φ are power of motor factor, in the range of 0.85-0.9；
(5) the active * η electricity of output power of motor P output=P, wherein the range of η electricity is 0.93-0.97；
(3) centrifugal water pump shaft power P axis=P output * η transmission；According to kind of drive difference, different transmissions is taken to imitate
Rate, pipeline pump transmission efficiency η transmission=1, remaining shaft coupling transmission efficiency is between 0.97-0.99.
(4) effectively=(Q*H*9.81)/3600, wherein Q is pump capacity, unit m to centrifugal water pump effective power P3/
H, H are pump head, and unit m, η pump is pump efficiency；
(5) centrifugal water pump efficiency eta pump=P effectively/P axis.
The centrifugal pump remodeling method being related in the step c includes：Reduce flowage friction loss, reduce impact loss,
The energy conservation measure of the energy conservation measure of Impeller trim and centrifugal pump speed regulation.
Embodiment 6：
A kind of energy-efficient application method of centrifugal water pump, it is characterised in that work step is as follows：
A. DATA REASONING is carried out to centrifugal water pump；
B. the measurement data being related in step a is calculated；
C. centrifugal water pump is transformed according to the data calculated in b；
D. it is tested after the transformation in step c in centrifugal water pump；
E. the centrifugal water pump after being modified is being put into production use after step d test.
DATA REASONING involved in the step a is：It is real that centrifugal water pump discharge is measured by hand-held ultrasonic flowmeter
Border flow Q, delivery gauge measure the practical lift H of water pump, and clamp on amperemeter measures motor operation and turns actual current I and voltage U.
The calculating being related in the step b is as follows：
(1) motor active-power P it is active=U*I*1.732* φ, wherein U be voltage, unit v, I are electric current, and unit is
A, φ are power of motor factor, in the range of 0.85-0.9；
(6) the active * η electricity of output power of motor P output=P, wherein the range of η electricity is 0.93-0.97；
(3) centrifugal water pump shaft power P axis=P output * η transmission；According to kind of drive difference, different transmissions is taken to imitate
Rate, pipeline pump transmission efficiency η transmission=1, remaining shaft coupling transmission efficiency is between 0.97-0.99.
(4) effectively=(Q*H*9.81)/3600, wherein Q is pump capacity, unit m to centrifugal water pump effective power P3/
H, H are pump head, and unit m, η pump is pump efficiency；
(5) centrifugal water pump efficiency eta pump=P effectively/P axis.
The centrifugal pump remodeling method being related in the step c includes：Reduce flowage friction loss, reduce impact loss,
The energy conservation measure of the energy conservation measure of Impeller trim and centrifugal pump speed regulation.
The measure for reducing flowage friction loss：It is right including the use of in the external coating coating of overcurrent element or japanning
Impeller cover and pump housing rough surface are polished with grinding wheel.
Embodiment 7：
A kind of energy-efficient application method of centrifugal water pump, it is characterised in that work step is as follows：
A. DATA REASONING is carried out to centrifugal water pump；
B. the measurement data being related in step a is calculated；
C. centrifugal water pump is transformed according to the data calculated in b；
D. it is tested after the transformation in step c in centrifugal water pump；
E. the centrifugal water pump after being modified is being put into production use after step d test.
DATA REASONING involved in the step a is：It is real that centrifugal water pump discharge is measured by hand-held ultrasonic flowmeter
Border flow Q, delivery gauge measure the practical lift H of water pump, and clamp on amperemeter measures motor operation and turns actual current I and voltage U.
The calculating being related in the step b is as follows：
(1) motor active-power P it is active=U*I*1.732* φ, wherein U be voltage, unit v, I are electric current, and unit is
A, φ are power of motor factor, in the range of 0.85-0.9；
(7) the active * η electricity of output power of motor P output=P, wherein the range of η electricity is 0.93-0.97；
(3) centrifugal water pump shaft power P axis=P output * η transmission；According to kind of drive difference, different transmissions is taken to imitate
Rate, pipeline pump transmission efficiency η transmission=1, remaining shaft coupling transmission efficiency is between 0.97-0.99.
(4) effectively=(Q*H*9.81)/3600, wherein Q is pump capacity, unit m to centrifugal water pump effective power P3/
H, H are pump head, and unit m, η pump is pump efficiency；
(5) centrifugal water pump efficiency eta pump=P effectively/P axis.
The centrifugal pump remodeling method being related in the step c includes：Reduce flowage friction loss, reduce impact loss,
The energy conservation measure of the energy conservation measure of Impeller trim and centrifugal pump speed regulation.
The measure for reducing flowage friction loss：It is right including the use of in the external coating coating of overcurrent element or japanning
Impeller cover and pump housing rough surface are polished with grinding wheel.
The measure for reducing impact loss：Blade is made the twisted blade with space curved surface shape.
The energy conservation measure of the Impeller trim：Before being cut in the maximum cutting surplus allowed band of impeller to impeller
Afterwards.
Embodiment 8：
A kind of energy-efficient application method of centrifugal water pump, it is characterised in that work step is as follows：
A. DATA REASONING is carried out to centrifugal water pump；
B. the measurement data being related in step a is calculated；
C. centrifugal water pump is transformed according to the data calculated in b；
D. it is tested after the transformation in step c in centrifugal water pump；
E. the centrifugal water pump after being modified is being put into production use after step d test.
DATA REASONING involved in the step a is：It is real that centrifugal water pump discharge is measured by hand-held ultrasonic flowmeter
Border flow Q, delivery gauge measure the practical lift H of water pump, and clamp on amperemeter measures motor operation and turns actual current I and voltage U.
The calculating being related in the step b is as follows：
(1) motor active-power P it is active=U*I*1.732* φ, wherein U be voltage, unit v, I are electric current, and unit is
A, φ are power of motor factor, in the range of 0.85-0.9；
(8) the active * η electricity of output power of motor P output=P, wherein the range of η electricity is 0.93-0.97；
(3) centrifugal water pump shaft power P axis=P output * η transmission；According to kind of drive difference, different transmissions is taken to imitate
Rate, pipeline pump transmission efficiency η transmission=1, remaining shaft coupling transmission efficiency is between 0.97-0.99.
(4) effectively=(Q*H*9.81)/3600, wherein Q is pump capacity, unit m to centrifugal water pump effective power P3/
H, H are pump head, and unit m, η pump is pump efficiency；
(5) centrifugal water pump efficiency eta pump=P effectively/P axis.
The centrifugal pump remodeling method being related in the step c includes：Reduce flowage friction loss, reduce impact loss,
The energy conservation measure of the energy conservation measure of Impeller trim and centrifugal pump speed regulation.
The measure for reducing flowage friction loss：It is right including the use of in the external coating coating of overcurrent element or japanning
Impeller cover and pump housing rough surface are polished with grinding wheel.
The measure for reducing impact loss：Blade is made the twisted blade with space curved surface shape.
The energy conservation measure of the Impeller trim：Before being cut in the maximum cutting surplus allowed band of impeller to impeller
Afterwards.
The energy conservation measure of the centrifugal pump speed regulation：Change its flow, lift and shaft power using the method for changing revolving speed.
Embodiment 9：
A kind of energy-efficient application method of centrifugal water pump, it is characterised in that work step is as follows：
A. DATA REASONING is carried out to centrifugal water pump；
B. the measurement data being related in step a is calculated；
C. centrifugal water pump is transformed according to the data calculated in b；
D. it is tested after the transformation in step c in centrifugal water pump；
E. the centrifugal water pump after being modified is being put into production use after step d test.
DATA REASONING involved in the step a is：It is real that centrifugal water pump discharge is measured by hand-held ultrasonic flowmeter
Border flow Q, delivery gauge measure the practical lift H of water pump, and clamp on amperemeter measures motor operation and turns actual current I and voltage U.
The calculating being related in the step b is as follows：
(1) motor active-power P it is active=U*I*1.732* φ, wherein U be voltage, unit v, I are electric current, and unit is
A, φ are power of motor factor, in the range of 0.85-0.9；
(9) the active * η electricity of output power of motor P output=P, wherein the range of η electricity is 0.93-0.97；
(3) centrifugal water pump shaft power P axis=P output * η transmission；According to kind of drive difference, different transmissions is taken to imitate
Rate, pipeline pump transmission efficiency η transmission=1, remaining shaft coupling transmission efficiency is between 0.97-0.99.
(4) effectively=(Q*H*9.81)/3600, wherein Q is pump capacity, unit m to centrifugal water pump effective power P3/
H, H are pump head, and unit m, η pump is pump efficiency；
(5) centrifugal water pump efficiency eta pump=P effectively/P axis.
The centrifugal pump remodeling method being related in the step c includes：Reduce flowage friction loss, reduce impact loss,
The energy conservation measure of the energy conservation measure of Impeller trim and centrifugal pump speed regulation.
The measure for reducing flowage friction loss：It is right including the use of in the external coating coating of overcurrent element or japanning
Impeller cover and pump housing rough surface are polished with grinding wheel.
The measure for reducing impact loss：Blade is made the twisted blade with space curved surface shape.
The energy conservation measure of the Impeller trim：Before being cut in the maximum cutting surplus allowed band of impeller to impeller
Afterwards.
The energy conservation measure of the centrifugal pump speed regulation：Change its flow, lift and shaft power using the method for changing revolving speed.
Centrifugal water pump efficient operating regime in the present invention：
(1) operating point when centrifugal pump water pump works in pipeline
The height for being centrifuged the way depends on its acceptable operating point
Position.Since centrifugal pump is connected in pipeline, so the flow and lift of pump must simultaneously meet pepeline characteristic side
The characteristic equation H=f2 (qv) of journey L=f1 (qv) and pump, pump characteristic curve and characteristic curve of pipeline intersection point P are the operating point pumped,
Such as Fig. 1.If the higher i.e. pump operation of the corresponding efficiency of operating point P of centrifugal pump meets cost-effectiveness requirement in efficient state.
(2) efficient operating regime of centrifugal pump water pump
Guaranteeing the operating point of centrifugal pump can correspond to that efficiency of centrifugal pump is higher, if Fig. 2 is on the efficiency characteristic of pump
△ η=5%~8% is moved down by η max and obtains the higher efficiency range ab of centrifugation pump work, by a, b make the vertical line of qv reference axis with
H-qv (D2) characteristic curve of centrifugal pump meets at A, B, then AB is the efficacious workaround of centrifugal pump.When the operating point of centrifugal pump falls in spy
Between linearity curve AB, then centrifugal pump lower operation at concert pitch.If the operating point of centrifugal pump, can be by cutting not between AB
It cuts impeller or changes the method for revolving speed to change the characteristic curve of centrifugal pump, so that the operating point of centrifugal pump falls in efficient operation
Area.
Characteristic curve of centrifugal pump H-qv (D2) efficient work that AB is non-cutting impeller outer diameter D 2 and revolving speed in Fig. 2 when being n
Make area；CD indicates to reach the characteristic curve of centrifugal pump H '-q ' v (D ' 2min) when impeller maximum cutting quantity D ' 2min and revolving speed are n
Efficacious workaround after cutting；AC, BD respectively indicated A, B two isoeffect curves H1=KAq2v and H2=KBq2v, quadrangle
ABDC is the efficient operating regime of centrifugal pump.
It can guarantee that centrifugal pump is run under efficient state when the operating point of centrifugal pump is fallen in efficient operating regime.
Centrifugal water pump improved efficiency measure
(1) measure of flowage friction loss is reduced
The wetted surfaces of centrifugal pump such as spiral case, due to using casting, generally without machining, surface is relatively rough,
Increase the flow losses of fluid.Following method can be passed through：(1) utilize in the external coating coating of overcurrent element or japanning
Method make pump efficiency can be improved 2%~3%；(2) the efficiency of pump can be improved to impeller cover and the polishing of pump housing rough surface grinding wheel
2%~4%；In addition, runner should not be lengthened excessively, otherwise increasing flow losses reduces the working efficiency of centrifugal pump.
(2) measure of impact loss is reduced
In order to guarantee that liquid stream enters liquid stream of the leaf road along entire blade height without impact, in the same road Shi Ye in each streamline
Same lift can be obtained, blade can be made to the twisted blade with space curved surface shape.When flow deviate design discharge compared with
It, can be according to flow tune using moving vane according to inlet velocity triangle it is found that generating impact loss at vane inlet when more
Width of blade is saved, impact is reduced and reaches energy-efficient purpose under the conditions of variable working condition.
(3) energy conservation measure of Impeller trim
In the maximum cutting surplus allowed band of impeller, before and after Impeller trim, from cutting theorem：
Qv '/Qv=D ' 2/D2；H '/H=(D ' 2/D2) 2；P '/P=(D ' 2/D2) 3
Specific speed of pump ns=(3.65*n*Q1/2)/H3/4, n- revolving speed, r/min Q- flow, m3/s H- lift, m
The relationship of specific speed of pump and cutting output such as 1 blade cutting limit of table and pump specific angular speed relationship
1 blade cutting limit of table and pump specific angular speed relationship
(4) energy conservation measure of centrifugal pump speed regulation
Centrifugal pump is to be selected according to peak load, but the peak load time is shorter, when the operating parameter of centrifugal pump is separate
When design parameter, its flow, lift and shaft power can be changed using the method for changing revolving speed.When impeller diameter is constant and impeller
When revolving speed changes few, from similarity law：
Qv '/Qv=n '/n；H '/H=(n '/n) 2；P '/P=(n '/n) 3
With cutting law, revolving speed reduces then flow, lift and power and decreases, and especially power reduces more, therefore drops
The revolving speed of low centrifugal pump is to realize energy-efficient important method under the conditions of variable working condition, is exactly variable frequency adjustment technology.
Measurement：
Due to pump selection and process system, pipe-line system matching error, water pump actual flow is caused to be deposited with metered flow
In certain difference, most of water pump efficiency is caused to be not in efficient operating regime.This patent method passes through hand-held
Ultrasonic flow rate measurement amount centrifugal water pump discharge actual flow Q, delivery gauge measure the practical lift H of water pump, pincerlike electric current
Table measures motor operation and turns the dynamic parameters such as actual current I, voltage U.It is raised by changing valve opening with obtaining Centrifugal Pump-
Journey-efficiency characteristic.Below table is new pump house 1# conveying pump measurement data, the new pump house 1# conveying pump measurement data system of table -2
Count table
The new pump house 1# conveying pump measurement data statistical form of table -2
| Measurement point | Flow Q | Lift H | Electric current I | Voltage U |
| 1 | 704m3/h | 48m | 238A | 380V |
| 2 | 691m3/h | 48.5m | 229A | 380V |
| 3 | 676m3/h | 49.1m | 217A | 380V |
| 4 | 651m3/h | 49.6m | 213A | 380V |
| 5 | 632m3/h | 50.2m | 205A | 380V |
| 6 | 622m3/h | 50.5m | 201A | 380V |
| 7 | 610m3/h | 50.8m | 201A | 380V |
| 8 | 596m3/h | 50.9m | 200A | 380V |
| 9 | 586m3/h | 51.1m | 199A | 380V |
It calculates：
(1) motor active power：P is active=U measurement * I measurement * 1.732* φ (practical dissipation power)
(2) output power of motor：The active * η electricity of P output=P
(3) centrifugal water pump shaft power：P axis=P output * η transmission
(4) centrifugal water pump effective power P is effectively=(Q measure * H measurement * 9.81)/3600
(5) centrifugal water pump efficiency eta pump=P effectively/P axis
According to measurement data and above-mentioned formula calculation process, it can be deduced that the actual operating efficiency of a water pump, to sentence
Whether water cut-off pump is in efficient operation range.
According to measurement, data are calculated, centrifugal water pump simulating traffic-lift-efficiency characteristic figure is drawn, sees Fig. 3.
Claims (8)
1. a kind of energy-efficient application method of centrifugal water pump, it is characterised in that work step is as follows：
A. DATA REASONING is carried out to centrifugal water pump；
B. the measurement data being related in step a is calculated；
C. centrifugal water pump is transformed according to the data calculated in b；
D. it is tested after the transformation in step c in centrifugal water pump；
E. the centrifugal water pump after being modified is being put into production use after step d test.
2. the energy-efficient application method of a kind of centrifugal water pump according to claim 1, it is characterised in that：It is related in the step a
And DATA REASONING is：Centrifugal water pump discharge actual flow Q is measured by hand-held ultrasonic flowmeter, delivery gauge measures
The practical lift H of water pump, clamp on amperemeter measure motor operation and turn actual current I and voltage U.
3. the energy-efficient application method of a kind of centrifugal water pump according to claim 1, it is characterised in that：It is related in the step b
And the calculating arrived is as follows：
(1) motor active-power P it is active=U*I*1.732* φ, wherein U be voltage, unit v, I are electric current, unit A, φ
For power of motor factor, in the range of 0.85-0.9；
(10) the active * η electricity of output power of motor P output=P, wherein the range of η electricity is 0.93-0.97；
(3) centrifugal water pump shaft power P axis=P output * η transmission；According to kind of drive difference, different transmission efficiencies is taken, is managed
Road pump drive efficiency eta transmission=1, remaining shaft coupling transmission efficiency is between 0.97-0.99.
(4) effectively=(Q*H*9.81)/3600, wherein Q is pump capacity, unit m to centrifugal water pump effective power P3/ h, H are
Pump head, unit m, η pump is pump efficiency；
(5) centrifugal water pump efficiency eta pump=P effectively/P axis.
4. the energy-efficient application method of a kind of centrifugal water pump according to claim 1, it is characterised in that：It is related in the step c
And to centrifugal pump remodeling method include：Reduce flowage friction loss, reduce impact loss, the energy conservation measure of Impeller trim and from
The energy conservation measure of heart pump speed regulation.
5. the energy-efficient application method of a kind of centrifugal water pump according to claim 4, it is characterised in that：The reduction flowing rubs
It wears the measure of mistake：Including the use of in the external coating coating of overcurrent element or japanning, impeller cover and pump housing rough surface are used
Grinding wheel polishing.
6. the energy-efficient application method of a kind of centrifugal water pump according to claim 4, it is characterised in that：The reduction impact damage
The measure of mistake：Blade is made the twisted blade with space curved surface shape.
7. the energy-efficient application method of a kind of centrifugal water pump according to claim 4, it is characterised in that：The Impeller trim
Energy conservation measure：Before and after being cut in the maximum cutting surplus allowed band of impeller to impeller.
8. the energy-efficient application method of a kind of centrifugal water pump according to claim 4, it is characterised in that：The centrifugal pump speed regulation
Energy conservation measure：Change its flow, lift and shaft power using the method for changing revolving speed.
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