CN106762709A - A kind of micro- lift vertical axial-flow pump lift measurement apparatus and measuring method - Google Patents
A kind of micro- lift vertical axial-flow pump lift measurement apparatus and measuring method Download PDFInfo
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- CN106762709A CN106762709A CN201611146844.2A CN201611146844A CN106762709A CN 106762709 A CN106762709 A CN 106762709A CN 201611146844 A CN201611146844 A CN 201611146844A CN 106762709 A CN106762709 A CN 106762709A
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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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Abstract
The present invention relates to a kind of micro- lift vertical axial-flow pump lift measurement apparatus and measuring method.This measurement apparatus includes axial-flow pump and water tank, and first pressure sensor, the first valve, auxiliary pump, the second valve are provided with the pipeline between the pump discharge and water tank of the axial-flow pump；Flowmeter is additionally provided with pipeline between the pump discharge and water tank of the axial-flow pump；The inlet and outlet of the auxiliary pump is respectively arranged with second pressure sensor and the 3rd pressure sensor.The present apparatus by setting up auxiliary pump in the pipe-line system of axial-flow pump, the resistance of pipe-line system when effectively overcoming experiment, thus adequately measure micro- lifting pump lift and characteristic curve of pipeline provide solid experimental rig platform.Being measured using micro- lift of the vertical axial-flow pump of measurement apparatus in the present invention can effectively reduce measurement error, improve the degree of accuracy of measurement result.
Description
Technical field
The invention belongs to axial-flow pump lift field of measuring technique, and in particular to a kind of micro- lift vertical axial-flow pump lift measurement
Device and measuring method.
Background technology
Liquid is discharged after pump installation obtains energy along export pipeline, due to pipeline drag characteristic in itself, when pump dress
When putting the liquid of discharge different flow, it needs to overcome different on-way resistances.Particularly, for the pipeline of a fixed structure,
Bigger by flow, the friction loss of pipeline is also bigger, conversely then smaller.Existing lift experimental rig is directed to raise
Journey is more than several meters of pump installation, and it is calculated corresponding under certain flow by the inlet and outlet pressure of direct measurement pump installation
Lift, now, the pipe resistance of pipe-line system influences very little for the measurement of lift, and the linear loss of pipeline can relative to the lift of pump
To ignore, the problem for overcoming pipe to hinder in also being run regardless of pump installation.And micro- lifting pump is during operation, due to
Lift is low in itself for pump, it is difficult to overcome the on-way resistance of pipeline, and especially during big flow operating mode, pipe resistance is dramatically increased, then lift
Measurement error is bigger, it could even be possible to there is the situation that micro- lifting pump cannot work.Therefore when the lift of micro- lifting pump is measured,
Influence of the pipe resistance to lift measurement can not be ignored.But the lift and characteristic curve of pipeline of micro- lifting pump how are accurately measured,
Just into the technical barrier that those skilled in the art are urgently to be resolved hurrily.
The content of the invention
In order to solve the above-mentioned technical problem, the invention provides a kind of micro- lift vertical axial-flow pump lift measurement apparatus, this
Device by setting up auxiliary pump in the pipe-line system of axial-flow pump, the resistance of pipe-line system when effectively overcoming experiment so that
The lift and characteristic curve of pipeline for adequately measuring micro- lifting pump provide solid experimental rig platform.
In order to realize the purpose of the present invention, present invention employs following technical scheme：
A kind of micro- lift vertical axial-flow pump lift measurement apparatus, including axial-flow pump and water tank, the pump discharge of the axial-flow pump
First pressure sensor, the first valve, auxiliary pump, the second valve are provided with pipeline between water tank；The axial-flow pump
Flowmeter is additionally provided with pipeline between pump discharge and water tank；The inlet and outlet of the auxiliary pump is respectively arranged with second
Pressure sensor and the 3rd pressure sensor.
Preferably, the range of flow of the auxiliary pump is adapted with the range of flow of axial-flow pump, the lift of the auxiliary pump
Higher than the lift of axial-flow pump.
Preferably, the present apparatus also includes motor, and shaft coupling, the shaft coupling are provided between the motor and the axial-flow pump
Torquemeter is provided with device.
Further, the shaft coupling includes the motor shaft sleeve pipe being set on motor output shaft, also including being arranged on pump
Pump shaft sleeve pipe on axle, the two ends of the torquemeter connect motor shaft sleeve pipe and pump shaft sleeve pipe respectively, and the torquemeter is by solid
Determine frame to be fixed together with the support frame of fixed motor.
Preferably, the first pressure sensor is arranged on the pump discharge straight length of axial-flow pump by device for pressure measurement
On.
Further, the device for pressure measurement includes two pieces be installed in successively vertically on the pump discharge straight length
Positioning baffle, is provided with the measurement sleeve pipe being set on pump discharge straight length between two pieces of positioning baffles, the measurement sleeve pipe and
Measured zone is enclosed jointly between two pieces of positioning baffles；It is provided with for laying first pressure sensor on the measurement sleeve pipe
Bearing；The pump discharge straight length is being provided with pressure tap on the pipe shaft in measured zone；Positioning gear in top
Steam vent is provided with the top of plate or the measurement sleeve pipe, plug is provided with steam vent.
Further, four pressure taps are uniformly distributed along the circumference of the pump discharge straight length, and the pressure measurement
Kong Kong centers are in same level with the hole center of the bearing；Axial cross section area in measured zone described in ring-type
More than four the four of the total cross sectional area of pressure tap times.
In order to avoid the fluid pressure fluctuation in ring shaped measuring region is to the adverse effect of pressure measxurement, need to ensure that ring-type is surveyed
Axial cross section area in amount region is more than four four times of the total cross sectional area of pressure tap 83.
Preferably, the pipe interior diameter of the pump discharge straight length is D, and the pipe range of the pump discharge straight length is more than 4D, institute
The distance between the installation site of first pressure sensor and the pump discharge of axial-flow pump are stated more than 2D.
Preferably, the auxiliary pump is pipeline pump.
Present invention also offers a kind of a kind of foregoing measurement side of micro- lift vertical axial-flow pump lift measurement apparatus
Method, its technical scheme is as follows：
S1, axial-flow pump is not turned on, the aperture of the first valve of regulation and the second valve, auxiliary pump is opened, to the vapour of auxiliary pump
Lose characteristic to be verified, obtain the interval without cavitation Flow of auxiliary pump；
S2, in auxiliary pump is interval without cavitation Flow, keeps axial-flow pump to close and is continued on auxiliary pump, and measurement is different
The pressure value of corresponding first pressure sensor under flow, obtains the pipe resistance characteristic curve of axial-flow pump outlet pipe section；
S3, by the first valve and the second valve wide open, auxiliary pump is continued to run with, and opens axial-flow pump；In auxiliary pump without vapour
In erosion flow rate zone, measurement obtains the flow lift curve and corresponding efficiency curve, shaft power curve of the axial-flow pump；
S4, using measuring flow lift curve, the efficiency of the pipe resistance characteristic curve that obtains to the axial-flow pump in step S2
Curve, shaft power curve are checked, and obtain flow lift curve, efficiency curve, shaft power curve after the check of axial-flow pump；
S5, removes auxiliary pump, is tested under the different operating modes in the range of flow of axial-flow pump, measures axial-flow pump independent
Working characteristicses curve during work；
S6, the characteristic curve of step S4 and step S5 is contrasted, if the response curve that obtains of two step measurements is right
Partly should coincide each other, then measurement terminates；Repeat step S1 to S5 is otherwise needed, until the phase that step S4 and step S5 measurements are obtained
The corresponding part of curve is answered to coincide each other.
The beneficial effects of the present invention are：
1) present invention has additional auxiliary pump in the pipe-line system of axial-flow pump, and the auxiliary pump is used to overcome pipe in test
The resistance of road system.By adjusting the valve of auxiliary pump rear and front end during experiment, you can accurately measure and obtain vertical-type axial-flow pump
The pipe resistance characteristic curve of pipe-line system during off-duty.After vertical-type axial-flow pump and auxiliary pump are operated together, you can measure axle
Head curve when stream pump is with auxiliary pump cooperation, the head curve that will be measured again hinders with the pipe of the pipe-line system for having measured
Characteristic curve is combined, you can to obtain the real lift of vertical-type axial-flow pump exactly.Therefore, filled using the measurement in the present invention
The micro- lift for putting vertical axial-flow pump is measured and can effectively reduce measurement error, improves the degree of accuracy of measurement result.
2) moment of torsion when present invention is operated using torquemeter measurement axial-flow pump, can exactly calculate the shaft work of pump installation
Rate；The present invention installs first pressure sensor on the pump discharge straight length of axial-flow pump, can measure the outlet for obtaining axial-flow pump
Pressure.The present invention also connects metal hose in the port of export of auxiliary pump, and the metal hose is used to adjust auxiliary pump outlet and the
The distance between three valves.By setting torquemeter, first pressure sensor, the present invention can also measure the effect for obtaining axial-flow pump
Rate curve and shaft power curve.
3) present invention sets steam vent by the measurement sleeve pipe of device for pressure measurement, efficiently solves measured zone
The problem that interior gas cannot be drained；Steam vent able to turn on or off is individually opened up by measurement sleeve pipe top end, it is achieved thereby that surveying
The autonomous of gas drains function in amount region, finally avoid interference of the bubble in measured zone to pressure measuring service, its
The measurement data of acquisition is naturally more accurate.Specifically, during experiment, the liquid in pump discharge straight length enters via pressure tap
Enter ring shaped measuring region, now under action of hydraulic force, the gas in ring shaped measuring region is escaped via steam vent；Ring to be drained
The steam vent is sealed after gas in shape measured zone again, you can micro- lift pump discharge pressure is carried out by first pressure sensor
Accurate measurement.
4) bearing being made up of round steel pipe is passed here as the installation carrier and first pressure of first pressure sensor
Being connected fixture and using between sensor and measurement sleeve pipe.On the one hand bearing realizes two by the solid welding between measurement sleeve pipe
The affixed function of person；On the other hand twisting for first pressure sensor is then realized by the large aperture section at the poroid tube chamber of itself ladder
Tight operation.When using, the axis of bearing and the axis of pressure tap are in same level, by small-bore section of bearing come
Ensure the accurate transmission function of hydraulic pressure.
5) present invention is provided with the pressure tap that four road uniform rings are set around pump discharge straight length, can at least ensure pressure tap water outlet
The harmony of peripheral region pressure distribution is held, then coordinates the branch that is made of round steel pipe being in pressure measurement axially bored line at same level
Seat, you can the measurement precision of effective lifting first pressure sensor.
Brief description of the drawings
Fig. 1 is the attachment structure schematic diagram of motor and axial-flow pump.
Fig. 2 is the structural representation of the device for pressure measurement on pump discharge straight length.
Fig. 3 is the A-A generalized sections of Fig. 2.
Fig. 4 is structural representation of the invention.
Fig. 5 is the front view of Fig. 4.
Fig. 6 is the top view of Fig. 4.
Fig. 7 is the cavitation curve of auxiliary pump.
Fig. 8 is the pipe resistance characteristic curve of the export pipeline of vertical-type axial-flow pump.
Fig. 9 is the pump characteristic curve of vertical-type axial-flow pump.
Figure 10 is the vertical-type axial-flow pump pump characteristic curve after checking.
Figure 11 is low flow rate condition characteristic curve when vertical-type axial-flow pump works independently.
Figure 12 is to add auxiliary pump and vertical axial-flow pump characteristic curve local contrast figure during without auxiliary pump.
The implication marked in figure is as follows：
1- motor 2- support frame 3- motor shaft sleeve pipe 4- fixed mount 5- torquemeters
6- pump shaft sleeve pipe 7- axial-flow pump 8- pump discharge straight length 81- adpting flanges
82-90 ° of bend pipe 83- pressure tap 9- first pressure sensor 91- bearing
92- measures sleeve pipe 921- steam vent 922- plug 923- mounting holes
93- positioning baffles 10/12- straight tube 11- flowmeters 13/15- straight tubes long
14- the first valve 16- second pressure sensor 17- auxiliary pumps
Pressure sensor 19- metal hoses 20- the second valve 21- water tanks of 18- the 3rd
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As Figure 4-Figure 6, a kind of micro- lift vertical axial-flow pump lift measurement apparatus, including axial-flow pump 7 and water tank 21, it is described
Be provided with pipeline between the pump discharge and water tank 21 of axial-flow pump 7 first pressure sensor 9, the first valve 14, auxiliary pump 17,
Second valve 19；Flowmeter 11 is additionally provided with pipeline between the pump discharge and water tank 21 of the axial-flow pump 7；The auxiliary pump
17 inlet and outlet is respectively arranged with the pressure sensor 18 of second pressure sensor 16 and the 3rd.The stream of the auxiliary pump 17
Amount scope is adapted with the range of flow of axial-flow pump 7, the lift of the lift higher than axial-flow pump 7 of the auxiliary pump 17.The present embodiment
In the auxiliary pump 17 be pipeline pump.
As shown in figure 1, the present apparatus also includes motor 1, shaft coupling, institute are provided between the motor 1 and the axial-flow pump 7
State and be provided with shaft coupling torquemeter 5.The shaft coupling includes the motor shaft sleeve pipe 3 being set on motor output shaft, also includes
The pump shaft sleeve pipe 6 on pump shaft is arranged on, the two ends of the torquemeter 5 connect motor shaft sleeve pipe 3 and pump shaft sleeve pipe 6 respectively, described
Torquemeter 5 is fixed together by fixed mount 4 with the support frame 2 of fixed motor 1.
As shown in figure 4, being partially installed on open water tank 21 by the whole makeup of the imports that motor 1 and vertical-type axial-flow pump 7 are constituted
Interior, there is coffin the dividing plate lower section in the middle of water tank 21, and this coffin is easy to water energy stabilization to be back to entering for vertical-type axial-flow pump 7
At mouthful.The axial-flow pump 7 is arranged on the bottom of water tank 21, and support frame 2 is arranged on the top of axial-flow pump 7, as shown in figure 1, motor 1 is pacified
On support frame 2, motor shaft sleeve pipe 3 is connected with the output shaft of motor, and torquemeter 5 is connected with motor shaft sleeve pipe 3, two pieces of fixations
The base plate of frame 4 is fixed on support frame 2, and torquemeter 5 is clamped in centre by the side plate of fixed mount 4, and the side plate of fixed mount 4 passes through
Screw tightens together with torquemeter 5.U-type groove is provided with the base plate of the fixed mount 4, in order to the position of mobile regulation side plate
Put, side plate is adjacent to torquemeter 5 during installation and set；U-type groove is also provided with the side plate of fixed mount 4, is easy to tighten screw.Torquemeter
5 lower sections are pump shaft sleeve pipes 6, and pump shaft sleeve pipe 6 is connected with the pump shaft of axial-flow pump 7.The length of the pump shaft sleeve pipe 6 can set compared with
It is long, to ensure the home that torquemeter 5 is located above the water surface.
As shown in figure 4, the first pressure sensor 9 is straight by pump discharge that device for pressure measurement is arranged on axial-flow pump 7
On pipeline section 8.
As shown in Figure 2,3, the device for pressure measurement includes being installed in successively vertically on the pump discharge straight length 8
Two pieces of positioning baffles 93, are provided with the measurement sleeve pipe 92 being set on pump discharge straight length 8 between two pieces of positioning baffles 93, described
Measured zone is enclosed jointly between measurement sleeve pipe 92 and two pieces of positioning baffles 93；It is provided with for pacifying on the measurement sleeve pipe 92
Put the bearing 91 of first pressure sensor 9；The pump discharge straight length 8 is being provided with pressure measurement on the pipe shaft in measured zone
Hole 83；The top of the measurement sleeve pipe 92 is provided with steam vent 921, and plug 922 is provided with steam vent 921.
As shown in Figure 2,3, four pressure taps 83 are uniformly distributed along the circumference of the pump discharge straight length 8, and described
The hole center of pressure tap 83 is in same level with the hole center of the bearing 91；Axial direction in measured zone described in ring-type
Area of section is more than this four the four of the total cross sectional area of pressure tap 83 times.
As shown in figure 4, the outlet lower section of axial-flow pump 7 is pump discharge straight tube of the segment length more than 4D (D is pipe interior diameter)
Section 8, first pressure sensor 9 is installed on pump discharge straight length 8, and position and the pump discharge of first pressure sensor 9 distance
It is 2D；Straight tube long 10 is connected by 90 ° of bend pipes 82 with pump discharge straight length 8, and the length of straight tube long 10 is more than 4D, and flowmeter 11 is pacified
Mounted in the end of straight tube long 10, the length of straight tube long 12 of the rear end of flowmeter 11 is also greater than 4D；First valve 14 is arranged on flowmeter
11 outlet rear end, the length of straight tube 13 of the import leading portion of the first valve 14 is 2.5D, flow and the vertical-type axial-flow pump 7 of auxiliary pump 17
Flow quite, auxiliary pump 17 is arranged on the rear end of the first valve 14, and the import and export of auxiliary pump 17 are respectively provided with a pressure and pass
Sensor, the respectively pressure sensor 18 of second pressure sensor 16 and the 3rd, the straight tube 15 of the import leading portion of the auxiliary pump 17 are grown
It is 4D to spend, and outlet section is connected by metal hose 19 with second valve 20 of pump discharge is controlled, and second valve 20 goes out
Stretch into water tank 21 at mouth end.
Measuring method of the invention is described in further detail with reference to the specific course of work.
(1) early-stage preparations.
After axial-flow pump 7 and pipe-line system are installed, to being poured water in water tank 21, now the first valve 14 and the second valve
20 standard-sized sheets of door, to drain the air in pipe-line system.First valve 14 is reached into maximum, the of the outlet section of auxiliary pump 17 is closed
Two valves 20, start auxiliary pump 17.
(2) checking of auxiliary pump cavitation characteristics.
The second valve 20 is slowly opened, ascending regulation rate of discharge, as Flow-rate adjustment definite value Q1, obtains auxiliary pump
17 inlet pressure Pout(being measured by second pressure sensor 16) is P1, exit pressure levels Pin(passed by the 3rd pressure
Sensor 18 is measured) it is P1 ', according toCalculate auxiliary pump lift H now1, then slowly turn the first valve 14 down
Aperture, ensure pipeline rate of discharge Q1The aperture of the second valve 20 is finely tuned in the case of constant；Adjusting the first valve
14 and second during valve 20, if lift H1Decline within 3%, then cavitation does not occur, if lift decrease beyond 3%,
Then there is cavitation in auxiliary pump 17.Recover the aperture of the second valve 20, the second valve 20 of regulation to flow Q2, now auxiliary pump 17
Inlet and outlet pressure value is respectively P2 and P2 ', calculates the lift H2 of now auxiliary pump, then slowly turns opening for the first valve 14 down
Degree, the aperture for still finely tuning the second valve 20 keeps flow Q2 constant, until the lift of auxiliary pump 17 declines 3%, auxiliary pump 17
Generation cavitation.The aperture of the second valve 20 to flow Q3, Q4, Q5, Q6 etc. are adjusted respectively according to above-mentioned same steps, then adjust auxiliary
The first valve 14 of the inducer of pump 17 is helped, the cavitation characteristics of auxiliary pump 17 are verified.
(3) in Fig. 7, auxiliary pump 17 is between the flow of A points and B points without generation cavitation, now, flowmeter 11 and first
The data that pressure sensor 9 is collected are available, when flow is beyond A, B point when, because auxiliary pump 17 there occurs cavitation, are owned
The data of collection are all disabled.Therefore, by auxiliary pump 17, ascending regulation obtains several flow points between A, B point
Qa, Qb, Qc, Qd, Qe, Qf, Qg, Qh, Qi, Qj, Qk, Ql, the first pressure sensor 9 in the exit of vertical-type axial-flow pump 7 can also show
Corresponding the pressure value pa, pb, pc, pd, pe, pf, pg, ph, pi, pj, pk, pl for showing；According to identical step, circulation regulation is auxiliary
The flow 7 times of pump 17 is helped, the data of 7 groups of above-mentioned flows and pressure are obtained, then 7 groups of data phase adductions averaged, obtained
Q and the respective average values of pressure value p of the display of first pressure sensor 9 between A, B flow point, according toWill pressure
Force value is converted into H respectively, so as to obtain a Q-H curve I, this curve is shown between the import and export section of vertical-type axial-flow pump 7
Pipe resistance characteristic curve, as shown in Figure 7.
(4) measurement of vertical-type axial-flow pump external characteristics parameter.
First valve 14 and the standard-sized sheet standard-sized sheet of the second valve 20, auxiliary pump 17 are continued to run with, vertical-type axial-flow pump 7 is opened；According to
The secondary aperture for adjusting the second valve 20 from big to small, records data Qa, Qb, the Qc of the flowmeter 11 of vertical-type axial-flow pump 7 respectively,
The numerical value pa ', pb ', pc of Qd, Qe, Qf, Qg, Qh, Qi, Qj, Qk, Ql and first pressure sensor 9 ', pd ', pe ', pf ', pg ',
Ph ', pi ', pj ', pk ', pl '；According to the flow point 7 times of above step circulation regulation pump, 7 groups of above-mentioned flows and pressure are obtained
Data, average is then taken respectively to 7 groups of data, according toThe data of first pressure sensor 9 are converted to
Ha ', Hb ', Hc ', Hd ', He ', Hf ' and, Hg ', Hh ', Hi ', Hj ' and, Hk ', Hl ', now, according to pump powerCalculate
Go out the corresponding pump power of each flow point, and the torquemeter 5 on vertical-type axial-flow pump 7 measures moment of torsion respectively Ta ', Tb ', Tc ', Td ',
Te ', Tf ', Tg ', Th ', Ti ', Tj ' and, Tk ', Tl ' foundation shaft powerShaft power respectively Pa ', Pb ' are calculated,
Pc ', Pd ', Pe ', Pf ', Pg ', Ph ' and, Pi ', Pj ', Pk ', Pl ' and, according to the efficiency of pumpCalculate efficiency of pump point η
A ', η b ', η c ', η d ', η e ', η f ', η g ', η h ', η i ', η j ', η k ', η l '.Finally give head curve II, efficiency curve III,
Shaft power curve IV, as shown in Figure 9.
(5) the characteristic check of vertical-type axial-flow pump.
Checked with reference to the characteristic curve of the vertical axial-flow pumps 7 of Fig. 8 and Fig. 9, raising under two curve same traffics
Cheng Xiangjia, i.e. HAlways=H+H ', obtains new Q-H curves V, and this curve is the actual head curve of vertical-type axial-flow pump.Such as work as flow
During for Qa, the actual lift of vertical-type axial-flow pump 17 is HA=Ha+Ha ', and its actual pump power isRoot
According to torque T measured by the torquemeter 5 on vertical-type axial-flow pump 7 ', the now shaft power of vertical-type axial-flow pumpCalculate new
The efficiency of pumpAs shown in Figure 10.
(6) accuracy to testing program is verified.
The second valve 20 is closed, vertical-type axial-flow pump 7 and auxiliary pump 17 is turned off.Auxiliary pump 17 is removed, valve is opened again
Vertical-type axial-flow pump 7 is opened, due to the lift very little of vertical-type axial-flow pump 7, removing auxiliary pump 17 afterwards cannot be under big flow operating mode
Normal operation, therefore only pump characteristics parameter of the measurement vertical-type axial-flow pump 7 under low flow rate condition, repetition are done 7 groups of experiments, will be collected
Data average after, obtain low discharge section vertical axial-flow pump characteristic curve as shown in figure 11, the curve that will be obtained and step
The low discharge section of the curve after vertical-type axial-flow pump is checked in (5) suddenly is contrasted, such as Figure 12.If corresponding curve is essentially coincided
Or coincide each other, then measurement terminates；Repeat step (1) to (5) is otherwise needed, until the phase that step (4) and step (5) measurement are obtained
The corresponding part of curve is answered to coincide each other.
Claims (10)
1. a kind of micro- lift vertical axial-flow pump lift measurement apparatus, including axial-flow pump (7) and water tank (21), it is characterised in that：Institute
State and first pressure sensor (9), the first valve are provided with the pipeline between the pump discharge of axial-flow pump (7) and water tank (21)
(14), auxiliary pump (17), the second valve (19)；Also set on pipeline between the pump discharge and water tank (21) of the axial-flow pump (7)
It is equipped with flowmeter (11)；The inlet and outlet of the auxiliary pump (17) is respectively arranged with second pressure sensor (16) and the 3rd
Pressure sensor (18).
2. a kind of micro- lift vertical axial-flow pump lift measurement apparatus as claimed in claim 1, it is characterised in that：The auxiliary pump
(17) range of flow is adapted with the range of flow of axial-flow pump (7), and the lift of the auxiliary pump (17) is higher than axial-flow pump (7)
Lift.
3. a kind of micro- lift vertical axial-flow pump lift measurement apparatus as claimed in claim 2, it is characterised in that：The present apparatus is also wrapped
Motor (1) is included, shaft coupling is provided between the motor (1) and the axial-flow pump (7), torquemeter is provided with the shaft coupling
(5)。
4. a kind of micro- lift vertical axial-flow pump lift measurement apparatus as claimed in claim 3, it is characterised in that：The shaft coupling
Including the motor shaft sleeve pipe (3) being set on motor output shaft, also including the pump shaft sleeve pipe (6) being arranged on pump shaft, the torsion
The two ends of square instrument (5) connect motor shaft sleeve pipe (3) and pump shaft sleeve pipe (6) respectively, the torquemeter (5) by fixed mount (4) with
The support frame (2) of fixed motor (1) is fixed together.
5. a kind of micro- lift vertical axial-flow pump lift measurement apparatus as claimed in claim 2, it is characterised in that：First pressure
Force snesor (9) is arranged on the pump discharge straight length (8) of axial-flow pump (7) by device for pressure measurement.
6. a kind of micro- lift vertical axial-flow pump lift measurement apparatus as claimed in claim 5, it is characterised in that：The pressure is surveyed
Amount device includes two pieces of positioning baffles (93) being installed in successively vertically on the pump discharge straight length (8), two pieces of positioning gears
The measurement sleeve pipe (92) being set on pump discharge straight length (8) is provided between plate (93), it is described to measure sleeve pipe (92) and two pieces
Positioning baffle encloses measured zone jointly between (93)；It is provided with measurement sleeve pipe (92) and is passed for laying first pressure
The bearing (91) of sensor (9)；The pump discharge straight length (8) is being provided with pressure tap on the pipe shaft in measured zone
(83)；Steam vent (921), steam vent are provided with the top of positioning baffle (93) or measurement sleeve pipe (92) in top
(921) place is provided with plug (922).
7. a kind of micro- lift vertical axial-flow pump lift measurement apparatus as claimed in claim 6, it is characterised in that：The pressure tap
(83) be uniformly distributed along the circumference of the pump discharge straight length (8), and the pressure tap (83) hole center and the bearing
(91) hole center is in same level；Axial cross section area in measured zone described in ring-type is more than multiple pressure taps
(83) four times of total cross sectional area.
8. a kind of micro- lift vertical axial-flow pump lift measurement apparatus as claimed in claim 5, it is characterised in that：The pump discharge
The pipe interior diameter of straight length (8) is D, and the pipe range of the pump discharge straight length (8) is more than 4D, the first pressure sensor (9)
The distance between the pump discharge of installation site and axial-flow pump (7) be more than 2D.
9. a kind of micro- lift vertical axial-flow pump lift measurement apparatus as claimed in claim 2, it is characterised in that：The auxiliary pump
(17) it is pipeline pump.
10. a kind of a kind of measuring method of micro- lift vertical axial-flow pump lift measurement apparatus as claimed in claim 3, its feature
It is as follows：
S1, axial-flow pump (7) is not turned on, the aperture of the first valve of regulation (14) and the second valve (19), opens auxiliary pump (17), right
The cavitation characteristics of auxiliary pump (17) are verified, obtain the interval without cavitation Flow of auxiliary pump (17)；
S2, in auxiliary pump (17) is interval without cavitation Flow, keeps axial-flow pump (7) to close and is continued on auxiliary pump, measures
The pressure value of corresponding first pressure sensor (9) under different flow, the pipe resistance characteristic for obtaining axial-flow pump (7) outlet pipe section is bent
Line；
S3, by the first valve (14) and the second valve (19) standard-sized sheet, auxiliary pump (17) is continued to run with, and opens axial-flow pump (7)；Auxiliary
Help pump (17) without cavitation Flow it is interval in, measurement obtain the axial-flow pump flow lift curve and corresponding efficiency curve,
Shaft power curve；
S4, using being measured in step S2, flow lift curve to the axial-flow pump (7) of the pipe resistance characteristic curve that obtains, efficiency are bent
Line, shaft power curve are checked, and obtain the flow lift curve after the check of axial-flow pump (7), efficiency curve, shaft power bent
Line；
S5, removes auxiliary pump (17), is tested under the different operating modes in the range of flow of axial-flow pump (7), measures axial-flow pump
(7) working characteristicses curve when working independently；
S6, the characteristic curve of step S4 and step S5 is contrasted, if the corresponding portion of the response curve that two step measurements are obtained
Divide and coincide each other, then measurement terminates；Repeat step S1 to S5 is otherwise needed, until the corresponding song that step S4 and step S5 measurements are obtained
The corresponding part of line coincide each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611146844.2A CN106762709B (en) | 2016-12-13 | 2016-12-13 | A kind of micro- lift vertical axial-flow pump lift measuring device and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611146844.2A CN106762709B (en) | 2016-12-13 | 2016-12-13 | A kind of micro- lift vertical axial-flow pump lift measuring device and measuring method |
Publications (2)
| Publication Number | Publication Date |
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| CN106762709A true CN106762709A (en) | 2017-05-31 |
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Cited By (6)
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| CN107246407A (en) * | 2017-06-27 | 2017-10-13 | 无锡市新久扬机械制造有限公司 | A kind of utilization pressure meter device measures the device and method of pump installation lift |
| CN109162910A (en) * | 2018-06-29 | 2019-01-08 | 武汉船用机械有限责任公司 | A kind of test device and test method of Cargo Oil Pump performance |
| CN113310706A (en) * | 2021-05-14 | 2021-08-27 | 湘潭大学 | Method for diagnosing resistance increasing fault of liquid cooling pipeline of electric automobile based on electronic water pump |
| CN113670180A (en) * | 2021-07-08 | 2021-11-19 | 四川轻化工大学 | Oil and gas well casing pipe distance measuring equipment and distance measuring method thereof |
| CN115655701A (en) * | 2022-10-24 | 2023-01-31 | 国检测试控股集团上海有限公司 | Method and system for testing functions of flow-limiting check valve |
| CN117108523A (en) * | 2023-10-24 | 2023-11-24 | 江苏新世界泵业有限公司 | Axial flow pump lift measuring device and measuring method |
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| CN117108523A (en) * | 2023-10-24 | 2023-11-24 | 江苏新世界泵业有限公司 | Axial flow pump lift measuring device and measuring method |
| CN117108523B (en) * | 2023-10-24 | 2024-02-02 | 江苏新世界泵业有限公司 | Axial flow pump lift measuring device and measuring method |
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