CN106762709B - A kind of micro- lift vertical axial-flow pump lift measuring device and measuring method - Google Patents
A kind of micro- lift vertical axial-flow pump lift measuring device and measuring method Download PDFInfo
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- CN106762709B CN106762709B CN201611146844.2A CN201611146844A CN106762709B CN 106762709 B CN106762709 B CN 106762709B CN 201611146844 A CN201611146844 A CN 201611146844A CN 106762709 B CN106762709 B CN 106762709B
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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 measuring device and measuring method.This measuring device includes axial-flow pump and water tank, and first pressure sensor, the first valve, auxiliary pump, the second valve are provided on the pipeline between the pump discharge and water tank of the axial-flow pump；It is additionally provided with flowmeter on 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 third pressure sensor.The present apparatus in the pipe-line system of axial-flow pump by adding auxiliary pump, the resistance of pipe-line system when effectively overcoming experiment, to adequately measure the lift of micro- lifting pump and characteristic curve of pipeline provides solid experimental rig platform.Measurement error can be effectively reduced by being measured using micro- lift of the vertical axial-flow pump of measuring device in the present invention, improve the 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 measurement method.
Background technology
It after liquid obtains energy by pump installation, is discharged along export pipeline, due to the drag characteristic of pipeline itself, when pump fills
When setting the liquid of discharge different flow, need to overcome different on-way resistances.Particularly, for the pipeline of certain structure,
Bigger by flow, the friction loss of pipeline is also bigger, then smaller on the contrary.Existing lift experimental rig is directed to raise
Journey is several meters or more of pump installation, it is calculated corresponding under certain flow by directly measuring the inlet and outlet pressure of pump installation
Lift, at this point, the pipe resistance of pipe-line system influences very little for the measurement of lift, the linear loss of pipeline can relative to the lift of pump
To ignore, overcome the problems, such as that pipe hinders in also being run regardless of pump installation.And micro- lifting pump is in the process of running, due to
Pump lift itself is low, it is difficult to which when overcoming the on-way resistance of pipeline, especially big flow operating mode, pipe resistance dramatically increases, then lift
Measurement error bigger, it could even be possible to there is the case where micro- lifting pump can not work.Therefore when measuring the lift of micro- lifting pump,
Pipe cannot be ignored and hinder the influence measured lift.However the lift and characteristic curve of pipeline of micro- lifting pump how are accurately measured,
Just at those skilled in the art's technical barrier urgently to be resolved hurrily.
Invention content
In order to solve the above technical problem, the present invention provides a kind of micro- lift vertical axial-flow pump lift measuring devices, originally
Device in the pipe-line system of axial-flow pump by adding auxiliary pump, the resistance of pipe-line system when effectively overcoming experiment, to
The lift and characteristic curve of pipeline for adequately measuring micro- lifting pump provide solid experimental rig platform.
In order to achieve the object of the present invention, present invention employs following technical schemes：
A kind of micro- lift vertical axial-flow pump lift measuring device, 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 on pipeline between water tank；The axial-flow pump
It is additionally provided with flowmeter on pipeline between pump discharge and water tank；The inlet and outlet of the auxiliary pump is respectively arranged with second
Pressure sensor and third 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 further includes motor, and shaft coupling, the shaft coupling are provided between the motor and the axial-flow pump
Torquemeter is provided on device.
Further, the shaft coupling includes the motor shaft casing being set on motor output shaft, further includes that setting is pumping
The both ends of pump shaft casing on axis, the torquemeter are separately connected motor shaft casing and pump shaft casing, and the torquemeter passes through solid
The supporting rack for determining frame and fixed motor is fixed together.
Preferably, the pump discharge straight pipe in axial-flow pump is arranged by device for pressure measurement for the first pressure sensor
On.
Further, the device for pressure measurement includes two pieces be installed in successively in an axial direction on the pump discharge straight pipe
Positioning baffle, is provided with the measurement casing being set on pump discharge straight pipe between two pieces of positioning baffles, the measurement casing and
Measured zone is enclosed jointly between two pieces of positioning baffles；It is provided on the measurement casing for placing first pressure sensor
Bearing；The pump discharge straight pipe is provided with pressure tap on the pipe shaft in measured zone；Positioning gear in top
It is provided with gas vent at the top of plate or the measurement casing, silk plug is provided at gas vent.
Further, four pressure taps are uniformly distributed along the circumferential direction of the pump discharge straight pipe, and the pressure measurement
The hole center in hole is in the hole center of the bearing in same level；Axial cross section area in the cyclic annular measured zone
More than four times of the total cross sectional area of four pressure taps.
In order to avoid the fluid pressure fluctuation in ring shaped measuring region is to the adverse effect of pressure measurement, it need to ensure cyclic annular survey
Measure four times that the axial cross section area in region is more than the total cross sectional area of four pressure taps 83.
Preferably, the pipe interior diameter of the pump discharge straight pipe is D, and the pipe range of the pump discharge straight pipe is more than 4D, institute
It states the distance between the installation site of first pressure sensor and the pump discharge of axial-flow pump and is more than 2D.
Preferably, the auxiliary pump is pipeline pump.
The present invention also provides a kind of a kind of foregoing measurement sides of micro- lift vertical axial-flow pump lift measuring device
Method, its technical solution is as follows：
S1, axial-flow pump are not turned on, and adjust the aperture of the first valve and the second valve, auxiliary pump are opened, to the vapour of auxiliary pump
Erosion characteristic verified, obtain auxiliary pump without cavitation Flow section；
S2 is measured different in auxiliary pump without in cavitation Flow section, keeping axial-flow pump closing and auxiliary pump to continue on
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 continues to run with, and opens axial-flow pump；In auxiliary pump without vapour
It loses in flow rate zone, measurement obtains the flow lift curve and corresponding efficiency curve, shaft power curve of the axial-flow pump；
S4, using the pipe resistance characteristic curve measured in step S2 to the flow lift curve of the axial-flow pump, efficiency
Curve, shaft power curve are checked, and flow lift curve, efficiency curve, shaft power curve after the check of axial-flow pump are obtained；
S5 removes auxiliary pump, is tested under the different operating modes in the range of flow of axial-flow pump, it is independent to measure axial-flow pump
Working characteristics curve when work；
S6 compares the characteristic curve of step S4 and step S5, if pair for the response curve that two step measurements obtain
It should partly coincide each other, then measure and terminate；Otherwise it needs to repeat step S1 to S5, until the phase that step S4 and step S5 measurements obtain
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.Pass through the valve of adjusting auxiliary pump rear and front end when experiment, you can accurately measure to obtain vertical-type axial-flow pump
The pipe resistance characteristic curve of pipe-line system when not running.After vertical-type axial-flow pump and auxiliary pump are operated together, you can measure axis
Head curve when stream pump is worked together with auxiliary pump, the head curve measured again and the pipe of the pipe-line system measured are hindered
Characteristic curve is combined, you can accurately to obtain the real lift of vertical-type axial-flow pump.Therefore, it is filled using the measurement in the present invention
The micro- lift for setting vertical axial-flow pump measures and can effectively reduce measurement error, improves the accuracy of measurement result.
2) present invention measures torque when axial-flow pump operates using torquemeter, can accurately calculate the shaft work of pump installation
Rate；The present invention installs first pressure sensor on the pump discharge straight pipe of axial-flow pump, can measure to obtain the outlet of axial-flow pump
Pressure.The present invention also connects metal hose in the outlet end of auxiliary pump, and the metal hose is for adjusting auxiliary pump outlet and the
The distance between three valves.By the way that torquemeter, first pressure sensor is arranged, the present invention can also measure to obtain the effect of axial-flow pump
Rate curve and shaft power curve.
3) present invention efficiently solves measured zone by the way that gas vent is arranged on the measurement casing of device for pressure measurement
The problem of interior gas can not drain；By individually opening up gas vent able to turn on or off at measurement cannula tip, surveyed to realize
The autonomous of gas drains function in amount region, finally avoids interference of the bubble in measured zone to pressure measuring service,
The measurement data of acquisition is naturally more accurate.Specifically, when experiment, liquid in pump discharge straight pipe via pressure tap and into
Enter ring shaped measuring region, at this time under action of hydraulic force, the gas in ring shaped measuring region is escaped via gas vent；Ring to be drained
The gas 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 made of round steel pipe is passed here as the installation carrier and first pressure of first pressure sensor
Being connected fixing piece and using between sensor and measurement casing.On the one hand bearing realizes two by measuring the solid welding between casing
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.In use, the central axes 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 equipped with the pressure tap that four uniform rings are arranged around pump discharge straight pipe, at least can guarantee pressure tap water outlet
The harmony of peripheral region pressure distribution is held, then coordinates and is propped up made of the round steel pipe being at same level with pressure measurement axially bored line
Seat, you can the effective measurement precision for promoting first pressure sensor.
Description of the drawings
Fig. 1 is the attachment structure schematic diagram of motor and axial-flow pump.
Fig. 2 is the structural schematic diagram of the device for pressure measurement on pump discharge straight pipe.
Fig. 3 is the A-A diagrammatic cross-sections of Fig. 2.
Fig. 4 is the structural schematic diagram of the present invention.
Fig. 5 is the front view of Fig. 4.
Fig. 6 is the vertical 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 vertical axial-flow pump characteristic curve local contrast figure when adding auxiliary pump and not adding auxiliary pump.
The meaning marked in figure is as follows：
1- motor 2- supporting rack 3- motor shaft casing 4- fixed frame 5- torquemeters
6- pump shaft casing 7- axial-flow pump 8- pump discharge straight pipe 81- connecting flanges
82-90 ° of bend pipe 83- pressure tap 9- first pressure sensor 91- bearing
92- measures casing 921- gas vent 922- silk plug 923- mounting holes
93- positioning baffle 10/12- long straight tube 11- flowmeter 13/15- straight tubes
14- the first valve 16- second pressure sensor 17- auxiliary pumps
18- third pressure sensor 19- metal hoses 20- the second valve 21- water tanks
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As Figure 4-Figure 6, a kind of micro- lift vertical axial-flow pump lift measuring device, including axial-flow pump 7 and water tank 21, it is described
Be provided on 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；It is additionally provided with flowmeter 11 on 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 second pressure sensor 16 and third pressure sensor 18.The stream of the auxiliary pump 17
Amount range is adapted with the range of flow of axial-flow pump 7, and the lift of the auxiliary pump 17 is higher than the lift of axial-flow pump 7.The present embodiment
In the auxiliary pump 17 be pipeline pump.
As shown in Figure 1, the present apparatus further includes motor 1, shaft coupling, institute are provided between the motor 1 and the axial-flow pump 7
It states and is provided with torquemeter 5 on shaft coupling.The shaft coupling includes the motor shaft casing 3 being set on motor output shaft, further includes
The both ends of the pump shaft casing 6 being arranged on pump shaft, the torquemeter 5 are separately connected motor shaft casing 3 and pump shaft casing 6, described
Torquemeter 5 is fixed together by fixed frame 4 and the supporting rack 2 of fixed motor 1.
As shown in figure 4, the entire makeup of the imports being made of motor 1 and vertical-type axial-flow pump 7 is partially installed on open water tank 21
It is interior, there is rectangular space below the partition board among water tank 21, this rectangular space can be stablized convenient for water is back to entering for vertical-type axial-flow pump 7
At mouthful.The axial-flow pump 7 is mounted on 21 bottom of water tank, and supporting rack 2 is mounted on the top of axial-flow pump 7, as shown in Figure 1, motor 1 is pacified
On supporting rack 2, motor shaft casing 3 is connected with the output shaft of motor, and torquemeter 5 is connected with motor shaft casing 3, two pieces of fixations
The bottom plate of frame 4 is fixed on supporting rack 2, and torquemeter 5 is clamped in centre by the side plate of fixed frame 4, and the side plate of fixed frame 4 passes through
Screw tightens together with torquemeter 5.It is provided with U-type groove on the bottom plate of the fixed frame 4, in order to the mobile position for adjusting side plate
It sets, when installation makes side plate be adjacent to the setting of torquemeter 5；It is also provided with U-type groove on the side plate of fixed frame 4, convenient for tightening screw.Torquemeter
5 lower sections are pump shaft casings 6, and pump shaft casing 6 is connected with the pump shaft of axial-flow pump 7.The length of the pump shaft casing 6 can be arranged compared with
It is long, to ensure home that torquemeter 5 is located above the water surface.
As shown in figure 4, by device for pressure measurement the pump discharge in axial-flow pump 7 to be arranged straight for the first pressure sensor 9
On pipeline section 8.
As shown in Figure 2,3, the device for pressure measurement includes being installed in successively in an axial direction on the pump discharge straight pipe 8
Two pieces of positioning baffles 93 are provided with the measurement casing 92 being set on pump discharge straight pipe 8 between two pieces of positioning baffles 93, described
It measures and encloses measured zone jointly between casing 92 and two pieces of positioning baffles 93；It is provided on the measurement casing 92 for pacifying
Put the bearing 91 of first pressure sensor 9；The pump discharge straight pipe 8 is provided with pressure measurement on the pipe shaft in measured zone
Hole 83；The top for measuring casing 92 is provided with gas vent 921, and silk plug 922 is provided at gas vent 921.
As shown in Figure 2,3, four pressure taps 83 are uniformly distributed along the circumferential direction of the pump discharge straight pipe 8, and described
The hole center of pressure tap 83 is in the hole center of the bearing 91 in same level；Axial direction in the cyclic annular measured zone
Area of section is more than four times of the total cross sectional area of this four pressure taps 83.
As shown in figure 4, being the pump discharge straight tube that a segment length is more than 4D (D is pipe interior diameter) below the outlet of axial-flow pump 7
Section 8, first pressure sensor 9 is installed on pump discharge straight pipe 8, and the position of first pressure sensor 9 is at a distance from pump discharge
For 2D；Long straight tube 10 is connected by 90 ° of bend pipes 82 with pump discharge straight pipe 8, and the length of long straight tube 10 is more than 4D, and flowmeter 11 is pacified
Mounted in the end of long straight tube 10,12 length of long straight tube of 11 rear end of flowmeter is also greater than 4D；First valve 14 is mounted on flowmeter
13 length of straight tube of 11 outlet rear end, 14 import leading portion of the first valve is 2.5D, flow and the vertical-type axial-flow pump 7 of auxiliary pump 17
Flow it is suitable, auxiliary pump 17 is mounted on the rear end of the first valve 14, and there are one pressure to pass for each installation of inlet and outlet of auxiliary pump 17
The straight tube 15 of sensor, respectively second pressure sensor 16 and third pressure sensor 18,17 import leading portion of the auxiliary pump is grown
Degree is 4D, and outlet section is connected by metal hose 19 with the second valve 20 of control pump discharge, and second valve 20 goes out
Mouth end is stretched into water tank 21.
The measurement method of the present invention is described in further detail with reference to the specific course of work.
(1) early-stage preparations.
It after axial-flow pump 7 and pipe-line system install, pours water into water tank 21, at this time 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 opened to the maximum, the of 17 outlet section of auxiliary pump is closed
Two valves 20 start auxiliary pump 17.
(2) verification of auxiliary pump cavitation characteristics.
The second valve 20 is slowly opened, ascending adjusting rate of discharge obtains auxiliary pump as flow-rate adjustment definite value Q1
17 inlet pressure Pout(being measured by second pressure sensor 16) is P1, exit pressure levels PinIt (is passed by third pressure
Sensor 18 measures) it is P1 ', according toCalculate auxiliary pump lift H at this time1, 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 cavitation occurs for auxiliary pump 17.Restore the aperture of the second valve 20, adjust the second valve 20 to flow Q2, at this time auxiliary pump 17
Inlet and outlet pressure value is respectively P2 and P2 ', the lift H2 of auxiliary pump at this time is calculated, 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
Cavitation occurs.20 aperture of the second valve is adjusted respectively according to above-mentioned same steps then to adjust auxiliary to flow Q3, Q4, Q5, Q6 etc.
The first valve 14 of 17 inducers of pump is helped, the cavitation characteristics of auxiliary pump 17 are verified.
(3) in Fig. 7, auxiliary pump 17 is no between A points and the flow of B points to occur cavitation, at this point, flowmeter 11 and first
The data that pressure sensor 9 is collected are available, and when flow is when other than A, B point, since cavitation has occurred in auxiliary pump 17, are owned
The data of collection are all disabled.Therefore, by auxiliary pump 17, ascending adjusting obtains several flow points between A, B point
The first pressure sensor 9 of Qa, Qb, Qc, Qd, Qe, Qf, Qg, Qh, Qi, Qj, Qk, Ql, 7 exit of vertical-type axial-flow pump can also be shown
The corresponding pressure value pa, pb, pc, pd, pe, pf, pg, ph, pi, pj, pk, pl shown；According to identical step, cycle adjusts auxiliary
The flow 7 times of pump 17 is helped, the data of 7 groups of above-mentioned flows and pressure is obtained, then 7 groups of data phase adductions is averaged, are obtained
A, the respective average values of pressure value p that Q and first pressure sensor 9 are shown between B flows point, according toIt will pressure
Force value is converted into H respectively, and to obtain a Q-H curve I, this curve is shown between the inlet and outlet 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.
By 20 standard-sized sheet standard-sized sheet of the first valve 14 and the second valve, auxiliary pump 17 continues to run with, and opens vertical-type axial-flow pump 7；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 '；The flow point 7 times for adjusting pump is recycled according to above step, obtains 7 groups of above-mentioned flows and pressure
Data, mean value 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 ', at this point, according to pump powerIt calculates
Go out the corresponding pump power of each flow point, and it is respectively Ta ' that the torquemeter 5 on vertical-type axial-flow pump 7, which measures torque, Tb ', Tc ', Td ',
Te ', Tf ', Tg ', Th ', Ti ', Tj ' and, Tk ', Tl ' are according to shaft powerIt is respectively Pa ', Pb ' to calculate shaft power,
Pc ', Pd ', Pe ', Pf ', Pg ', Ph ' and, Pi ', Pj ', Pk ', Pl ' and, the efficiency according to 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 obtain 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.
It is checked in conjunction with the characteristic curve of the vertical axial-flow pumps of Fig. 8 and Fig. 97, raising under two curve identical flows
Cheng Xiangjia, i.e. HAlways=H+H ', obtains new Q-H curves V, this curve is the practical head curve of vertical-type axial-flow pump.Such as work as flow
For Qa when, the practical lift of vertical-type axial-flow pump 17 is HA=Ha+Ha ', and practical pump power isRoot
According to torque T measured by the torquemeter 5 on vertical-type axial-flow pump 7 ', the shaft power of vertical-type axial-flow pump at this timeIt calculates newly
The efficiency of pumpAs shown in Figure 10.
(6) accuracy of testing program is verified.
The second valve 20 is closed, vertical-type axial-flow pump 7 and auxiliary pump 17 are turned off.Auxiliary pump 17 is removed, opens valve 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 later can not be under big flow operating mode
Normal operation, therefore pump characteristics parameter of the vertical-type axial-flow pump 7 under low flow rate condition is only measured, repetition is done 7 groups of experiments, will be collected
Data be averaged after, it is as shown in figure 11 to obtain small flow section vertical axial-flow pump characteristic curve, by obtained curve and step
Suddenly the small flow section of the curve after vertical-type axial-flow pump is checked in (5) is compared, such as Figure 12.If corresponding curve essentially coincides
Or coincide each other, then it measures and terminates；Otherwise it needs to repeat step (1) to (5), until step (4) and step (5) measure obtained phase
The corresponding part of curve is answered to coincide each other.
Claims (7)
1. a kind of measurement method of micro- lift vertical axial-flow pump lift measuring device, the measuring device include axial-flow pump (7) and
Water tank (21), be provided on the pipeline between the pump discharge and water tank (21) of the axial-flow pump (7) first pressure sensor (9),
First valve (14), auxiliary pump (17), the second valve (20)；Pipe between the pump discharge and water tank (21) of the axial-flow pump (7)
Road is additionally provided with flowmeter (11)；The inlet and outlet of the auxiliary pump (17) is respectively arranged with second pressure sensor
(16) and third pressure sensor (18)；
The range of flow of the auxiliary pump (17) is adapted with the range of flow of axial-flow pump (7), the lift of the auxiliary pump (17)
Higher than the lift of axial-flow pump (7)；
The present apparatus further includes motor (1), and shaft coupling, the shaft coupling are provided between the motor (1) and the axial-flow pump (7)
On be provided with torquemeter (5)；
Its feature is as follows：
S1, axial-flow pump (7) are not turned on, and adjust the aperture of the first valve (14) and the second valve (20), open auxiliary pump (17), right
The cavitation characteristics of auxiliary pump (17) are verified, obtain auxiliary pump (17) without cavitation Flow section；
S2 is measured in auxiliary pump (17) without in cavitation Flow section, keeping axial-flow pump (7) closing and auxiliary pump to continue on
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 are bent
Line；
S3, by the first valve (14) and the second valve (20) standard-sized sheet, auxiliary pump (17) continues to run with, and opens axial-flow pump (7)；Auxiliary
Help pump (17) without in cavitation Flow section, measure the flow lift curve for obtaining the axial-flow pump and corresponding Flux efficiency be bent
Line, flow shaft power curve；
S4 imitates flow lift curve, the flow of the axial-flow pump (7) using the pipe resistance characteristic curve measured in step S2
Rate curve, flow shaft power curve are checked, and it is bent to obtain the flow lift curve after the check of axial-flow pump (7), Flux efficiency
Line, flow shaft power curve；
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 characteristics curve when working independently；
S6 compares the characteristic curve of step S4 and step S5, if the correspondence portion for the response curve that two step measurements obtain
Divide and coincide each other, then measures and terminate；Otherwise it needs to repeat step S1 to S5, until the corresponding song that step S4 and step S5 measurements obtain
The corresponding part of line coincide each other.
2. a kind of measurement method of micro- lift vertical axial-flow pump lift measuring device as described in claim 1, it is characterised in that：
The shaft coupling includes the motor shaft casing (3) being set on motor output shaft, further includes the pump shaft casing being arranged on pump shaft
(6), the both ends of the torquemeter (5) are separately connected motor shaft casing (3) and pump shaft casing (6), and the torquemeter (5) passes through solid
Determine frame (4) and the supporting rack (2) of fixed motor (1) is fixed together.
3. a kind of measurement method of micro- lift vertical axial-flow pump lift measuring device as described in claim 1, it is characterised in that：
The first pressure sensor (9) is arranged by device for pressure measurement on the pump discharge straight pipe (8) of axial-flow pump (7).
4. a kind of measurement method of micro- lift vertical axial-flow pump lift measuring device as claimed in claim 3, it is characterised in that：
The device for pressure measurement includes two pieces of positioning baffles (93) being installed in successively in an axial direction on the pump discharge straight pipe (8),
The measurement casing (92) being set on pump discharge straight pipe (8), the measurement casing are provided between two pieces of positioning baffles (93)
(92) measured zone is enclosed jointly between two pieces of positioning baffles (93)；It is provided on the measurement casing (92) for placing
The bearing (91) of first pressure sensor (9)；The pump discharge straight pipe (8) is provided on the pipe shaft in measured zone
Pressure tap (83)；It is provided with gas vent (921) at the top of positioning baffle (93) or the measurement casing (92) in top, is arranged
Silk plug (922) is provided at stomata (921).
5. a kind of measurement method of micro- lift vertical axial-flow pump lift measuring device as claimed in claim 4, it is characterised in that：
The pressure tap (83) is uniformly distributed along the circumferential direction of the pump discharge straight pipe (8), and the hole center of the pressure tap (83) with
The hole center of the bearing (91) is in same level；Axial cross section area in the cyclic annular measured zone is more than multiple
Four times of the total cross sectional area of pressure tap (83).
6. a kind of measurement method of micro- lift vertical axial-flow pump lift measuring device as claimed in claim 3, it is characterised in that：
The pipe interior diameter of the pump discharge straight pipe (8) is D, and the pipe range of the pump discharge straight pipe (8) is more than 4D, the first pressure
The distance between the installation site of sensor (9) and the pump discharge of axial-flow pump (7) are more than 2D.
7. a kind of measurement method of micro- lift vertical axial-flow pump lift measuring device as described in claim 1, it is characterised in that：
The auxiliary pump (17) is pipeline pump.
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 |
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| 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 |
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| Publication Number | Publication Date |
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| CN106762709A CN106762709A (en) | 2017-05-31 |
| CN106762709B true CN106762709B (en) | 2018-07-27 |
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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 |
| CN109162910B (en) * | 2018-06-29 | 2020-03-17 | 武汉船用机械有限责任公司 | Cargo oil pump performance testing device and testing method |
| CN113310706B (en) * | 2021-05-14 | 2022-04-26 | 湘潭大学 | Method for diagnosing resistance increasing fault of liquid cooling pipeline of electric automobile based on electronic water pump |
| CN113670180B (en) * | 2021-07-08 | 2023-05-23 | 四川轻化工大学 | Oil-gas well casing distance measuring equipment and distance measuring method thereof |
| CN115655701B (en) * | 2022-10-24 | 2023-06-13 | 国检测试控股集团上海有限公司 | Flow-limiting check valve function test method and system |
| 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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| SU455205A1 (en) * | 1972-07-03 | 1974-12-30 | Предприятие П/Я М-5356 | Pump Test Bench |
| CN2160114Y (en) * | 1993-07-29 | 1994-03-30 | 石家庄钢铁厂 | Pressure taking device for medium containing dust |
| CN102635559B (en) * | 2012-04-10 | 2015-02-25 | 山东省农业机械科学研究所 | Closed pipeline device of pump test system |
| CN104454564B (en) * | 2014-11-10 | 2015-09-02 | 扬州大学 | Based on the axial-flow pump device diffuser hydraulic optimization method of test |
| US10197051B2 (en) * | 2015-03-23 | 2019-02-05 | Merrill Manufacturing Company | Pump control switch |
| CN206290454U (en) * | 2016-12-13 | 2017-06-30 | 合肥工业大学 | A kind of micro- lift vertical axial-flow pump lift measurement apparatus |
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