CN208503049U - A kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system - Google Patents
A kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system Download PDFInfo
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- CN208503049U CN208503049U CN201821087754.5U CN201821087754U CN208503049U CN 208503049 U CN208503049 U CN 208503049U CN 201821087754 U CN201821087754 U CN 201821087754U CN 208503049 U CN208503049 U CN 208503049U
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Abstract
Provided by the utility model is a kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system, using the method for visualization measurement flow field characteristic, while using fluorescence filter technology, improves the accuracy of flow field survey near blade；It is arranged in pairs or groups using continuous laser generator and high-speed camera, fully ensures that the continuity during flow field survey in timing, the clear timing information for obtaining centrifugal pump interior flow field characteristic realizes continuous capture of the centrifugal pump interior flow in timing.The utility model passes through to centrifugal pump interior flow field feature measurement and pressure fluctuation measurement, obtain centrifugal pump internal speed field, the small scale flow behavior of turbulent flow and fluctuation pressure characteristic, analyze interior flow field flow mechanism, and binding analysis flow field characteristic and pressure fluctuation characteristics, it understands the inner link between centrifugal pump internal structure, flow behavior and pressure fluctuation in depth, provides guidance for the improvement and vibration and noise reducing of centrifugal pump structure design.
Description
Technical field
The utility model relates to technical fields such as hydrodynamics, optics, vibration and noise reducing, nuclear safety, in particular to it is a kind of from
Heart pump flow field-pressure fluctuation coupling measurement experimental system.
Background technique
Centrifugal pump is one of the power device that energy conversion and fluid conveying is carried out in modern industry, with science and technology
Progress, centrifugal pump will be used wider and wider, and people also increasingly pay attention to centrifugal pump reliability of operation, stability, efficiently
Property and low vibration.Due to the complexity and asymmetry of centrifugal pump internal structure, internal working medium flowing is a kind of extremely multiple
Miscellaneous compound motion, the quality of performance of centrifugal pump depend greatly on internal flow situation, in addition, internal flow causes
High frequency pressure pulsations can generate noise, and then the pump housing is caused to vibrate, and propagate outward by pipeline, the pump housing can be damaged when serious
Structure influences to pump itself work.Therefore, the flow behavior of centrifugal pump interior flow field and pressure fluctuation characteristics research for improvement from
The design of heart pump structure improves operational efficiency, energy-saving and noise-reducing with extremely important meaning.
Though current existing visualization measurement system can realize the measurement of full field in centrifugal pump flow field, there are still it is following not
Foot: first, due to being combined using pulse laser and frame straddling cameras, it is limited to the working principle of pulse laser, cannot achieve flow field
Continuous measurement in timing；Second, due to centrifugal pump internal structure complexity, it is strong it is reflective cause in impeller channel pressure face with
Suction surface nearby can not be measured accurately in flow field；Third cannot achieve the synchro measure of flow field characteristic and pressure fluctuation characteristics；Therefore
It is necessary to design a kind of synchronous coupling measurement system of advanced centrifugal pump flow field-pressure fluctuation, realize centrifugal pump flow field characteristic with
Pressure fluctuation characteristics are accurate, convenient synchro measure.
Provided by the utility model is a kind of centrifugal pump interior flow field-pressure fluctuation coupling measurement experimental system, by right
Centrifugal pump interior flow field feature measurement and pressure fluctuation measurement obtain centrifugal pump internal speed field, the small scale flowing spy of turbulent flow
Property and fluctuation pressure characteristic, analyze interior flow field flow mechanism, and binding analysis flow field characteristic and pressure fluctuation characteristics, deeply
Understand the inner link between centrifugal pump internal structure, flow behavior and pressure fluctuation, the improvement designed for centrifugal pump structure with
And vibration and noise reducing provides guidance.
Utility model content
The purpose of this utility model is to provide for a kind of flow field survey precision with higher, realizes different experiments operating condition
Lower centrifugal pump interior flow field characteristic coupling measurement synchronous with high frequency pressure pulsations characteristic, while centrifugal pump interior flow field can be carried out
The centrifugal pump flow field of continuous acquisition in information timing-pressure fluctuation coupling measurement experimental system.
The purpose of this utility model is realized by following technical solution:
A kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system, including visualization circulation loop and fluctuation pressure
Acquisition and light path system, it is characterised in that: visualization circulation loop includes cyclic water tank, heater, heat exchanger, main valve, electromagnetism
Flowmeter, by-passing valve, main valve, inlet pressure gauge, transparent centrifugal pump, delivery gauge, exhaust valve, throttle valve, thermometer, threeway
Valve, discharge casing, working medium water tank and coloring agent water tank, transparent centrifugal pump water inlet pass through pipeline and inlet pressure gauge, main valve, electricity
The lower end water outlet of magnetic flowmeter, main valve and cyclic water tank is sequentially connected；Transparent centrifugal pump water outlet passes through pipeline and outlet
Pressure gauge, exhaust valve, throttle valve, thermometer and triple valve right output port are sequentially connected；Triple valve left port is protruded by pipeline
Into cyclic water tank, triple valve lower port is connect by pipeline with discharge casing；Cyclic water tank right end water outlet passes through piping connection
It is connected to after by-passing valve on the pipeline between main valve and electromagnetic flowmeter；Heat exchange is equipped in right end water outlet inside cyclic water tank
Device；Heater is equipped with inside cyclic water tank between lower end water outlet and left end water inlet；Working medium water outlet of water tank passes through pipeline
It is connect with coloring agent water outlet of water tank, cyclic water tank left end water inlet is gone out by piping connection in working medium water tank and coloring agent water tank
On pipeline between the mouth of a river；Working medium water outlet of water tank, coloring agent water outlet of water tank and cyclic water tank left end water inlet are all provided with
There is throttle valve；Fluctuation pressure acquisition and light path system include light source, optical filter, Pulse Pressure with High Frequency sensor, shaft encoder, list
Piece machine, light source, optical filter, high-speed camera, computer, universal data collecting system and frequency converter；On the left of transparent centrifugal pump
Light source is provided with right side；High-speed camera setting is in transparent centrifugal pump front, and optical filter setting is in high-speed camera and thoroughly
Between bright centrifugal pump；Transparent centrifugal pump is sequentially connected with shaft encoder, single-chip microcontroller and high-speed camera；Universal data collection system
System is connect with transparent centrifugal pump, and high-speed camera is connect with computer with universal data collecting system；Frequency converter and it is transparent from
Heart pump connection.
The utility model can also include:
The transparent centrifugal pump is cast using transparent PMMA material, and is processed by shot blasting to its surface.
The light source uses 532nm continuous laser generator, and the optical filter is the narrow pass filter of 532nm.
The described fluctuation pressure acquisition and light path system include synchronizer, and synchronizer is separately connected high-speed camera, general
Data collection system and computer.
Water inlet, axis and the pressure tap of the transparent centrifugal pump use flange-silica gel-flange in the same side
Connection type.
The utility model has the beneficial effects that:
The method that the utility model uses visualization measurement flow field characteristic, while fluorescence filter technology is used, avoid leaf
Runner internal pressure power face and suction surface are taken turns nearby because of strong reflective the problem of causing PIV particle not capture accurately, improve blade
The accuracy of neighbouring flow field survey；The utility model is compared to the pulse used in traditional flow-field visualized measuring system of centrifugal pump
Laser source and frame straddling cameras, continuous laser generator and the high-speed camera collocation that the utility model uses, can fully ensure that
Continuity during flow field survey in timing, the clear timing information for obtaining centrifugal pump interior flow field characteristic, realizes centrifugation
Pump continuous capture of the interior flow in timing；The utility model controls camera and acquisition system by isochronous controller
Triggering has fully ensured that measurement synchronism while realizing that flow field characteristic and pressure fluctuation measure；The utility model structure letter
It is single, ingenious in design, convenient disassembly.
Detailed description of the invention
Fig. 1 is a kind of visualization circulation loop schematic diagram of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system；
Fig. 2 is fluctuation pressure acquisition and the light path system of a kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system
Schematic diagram.
Specific embodiment
Specific embodiment of the present utility model is described further with reference to the accompanying drawing:
The visualization circulation loop system of the utility model in conjunction with Fig. 1, by cyclic water tank 1, heater 2, heat exchanger 3,
Main valve 4, electromagnetic flowmeter 5, by-passing valve 6, main valve 7, inlet pressure gauge 8, transparent centrifugal pump 9, delivery gauge 10, exhaust valve
11, throttle valve 12, thermometer 13, triple valve 14, discharge casing 15, working medium water tank 16 and coloring agent water tank 17 form.Experiment is opened
Before beginning, the throttle valve 12 of working medium water tank 16 and coloring agent water tank 17 is opened by certain valve opening, obtains the dye of suitable concentration
Toner solution enters in cyclic water tank 1.Bypass 6 and throttle valve 12 are closed, circuit main valve 4 is opened, slowly opens main valve 7, experiment
Centrifugal pump 9 starts water-filling and slowly starts centrifugal pump after the completion of the water-filling stage.After centrifugal pump reaches predetermined operating point, open
Outlet of centrifugal pump throttle valve 12, later on exhaust valve 11, is exhausted centrifugal pump, after exhaust, closes exhaust valve 11
And each instrument is opened, monitoring each parameter has without exception, completion circuit debugging.In experiment, under the driving of transparent centrifugal pump, working medium stream
Cyclic water tank 1 is returned to through each valve and instrument and completes flow circuit, and Temperature of Working is maintained by the heat exchanger 3 in cyclic water tank 1
It is constant, avoid working medium physical parameter from changing bring experimental error.
It is the fluctuation pressure acquisition and light path system of the utility model, by transparent centrifugal pump 9, dither pressure in conjunction with Fig. 2
The narrow pass filter 22 of force snesor 18, shaft encoder 19, single-chip microcontroller 20,532nm continuous laser generator 21,532nm is taken the photograph at a high speed
Camera 23, synchronizer 24, computer 25, universal data collecting system 26 and frequency converter 27 form.Flow field flow is believed in experiment
Breath is recorded by high-speed camera 23, and pressure fluctuation information is acquired by universal data collecting system 26, to guarantee information of flow
With the synchronism of pressure fluctuation information collection, the touching synchronous with acquisition system 26 of high-speed camera 23 is controlled by synchronizer 24
Hair avoids the time lag between data acquisition.Light sources complementary is carried out using two continuous laser generators 21, is arranged in pairs or groups simultaneously
High-speed camera 23 has fully ensured that the continuity during flow field survey in timing, clear to obtain centrifugal pump interior flow field
The timing information of characteristic is extremely important to research centrifugal pump the inside movement of flow field structure, evolution process；It adopts
With fluorescence filter technology, the fluorescence light wave of dyeing agent solution is filtered by narrow pass filter 22, and it is strong anti-nearby to eliminate blade
The problem of light covers PIV particle in runner has fully ensured that the accuracy of flow field flow characteristics measurement；In addition, being compiled using axis
Axis phase in code device 19 and 20 programmed recording flow field survey of single-chip microcontroller, fully ensures that the standard of measured zone phase in experimentation
True property, improves experiment measurement accuracy.
Provided by the utility model is a kind of advanced centrifugal pump interior flow field-pressure fluctuation coupling measurement experimental system,
Centrifugal pump interior flow field characteristic coupling measurement synchronous with high frequency pressure pulsations characteristic under different experiments operating condition can be achieved, while can
Carry out the continuous acquisition in centrifugal pump interior flow timing, utilizes high-speed camera, high-frequency pressure sensor and acquisition
System obtains flow field flow information and high frequency pressure pulsations information complicated inside centrifugal pump under different experiments operating condition, comprising:
The key parameters such as speed field distribution, turbulence intensity distribution, Vorticity Distribution, fluctuation pressure amplitude, circumferential fluctuating pressure distribution, in turn
Inner link in studying pressure fluctuation characteristics and pumping between flow behavior, flow field structure, for improvement Centrifugal Pump Design, vibration damping drop
It makes an uproar and data and theory support is provided.Experimental bench and high-speed camera are carried out using high-accuracy water level and laser aligner
It adjusts, fully ensure that high-speed camera and shoots the verticality in face, prevent optical path distortion bring measurement error.
Experiment centrifugal pump is cast using the PMMA material of high light transmittance and the high grade of transparency, and is polished to its surface
Processing, has fully ensured that the effect of visualization of experimental pump；
Using wavelength is the continuous laser generator of 532nm as light source, between compensating for pulse laser in time series
Disconnected deficiency has fully ensured that the continuity during flow field survey in timing, clear to obtain centrifugal pump interior flow field characteristic
Timing information；
Strong reflective the problem of covering to PIV particle in runner near blade, is eliminated using fluorescence filter technology, sufficiently
It ensure that the accuracy of flow field flow characteristics measurement；
Using the axis phase in shaft encoder and mcu programming record flow field survey, fully ensures that in experimentation and measure
The accuracy of region phase improves experiment measurement accuracy；
Using the triggering of isochronous controller control camera and acquisition system, fully ensure that flow field is synchronous with pressure fluctuation
Measurement；
Centrifugal pump water inlet, axis and pressure tap design in the same side, fully ensured that in experimentation laser source and
The convenience of camera arrangement avoids screening of the pressure sensor arrangement to the interference and water inlet pipe section of light to shooting area
Gear；
Visual transparent centrifugal pump uses flange-silica gel-flange connection type, while considering structural strength again
The good sealing effect of transparent centrifugal pump is fully ensured that；
Provided by the utility model is a kind of advanced centrifugal pump flow field-pressure fluctuation coupling measurement experimental system, experiment
System includes three closed cycle circuit, pressure fluctuation measuring system and light path system parts.The measurement system of the utility model
System can be realized simultaneously centrifugal pump interior flow field characteristic under different experiments operating condition, the synchronous coupling of high frequency pressure pulsations characteristic is surveyed
Amount.And for the deficiency of existing visualization measurement technology, solves blade strong reflective convection current nearby using fluorescence filter technology
The problem of PIV particle covers in road improves pressure face and suction surface flow field survey precision nearby；Continuous laser is used simultaneously
The combination of the relevant opticals such as device, high-speed camera, narrow pass filter realizes company of the centrifugal pump interior flow field in timing
Continuous measurement, compensates for the deficiency of pulse laser discontinuity in time series.The utility model may be implemented multiple inside centrifugal pump
Miscellaneous flow field coupling measurement synchronous with Pulse Pressure with High Frequency field, to complicated flow field flow characteristics, (such as VELOCITY DISTRIBUTION, turbulent flow is strong
Degree, flow separation, jet-wake) the expansion whole audience real-time measurement while, the synchronous dither information for obtaining pressure field is surveyed
Disturbance will not be generated to practical flow field during amount, experimental system design is ingenious, and cheap, data acquisition is accurate convenient, grinds
Study carefully the research that condition range is wide, suitable for complex flowfield flow behavior inside centrifugal pump and pressure fluctuation characteristics.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system, including visualization circulation loop are adopted with fluctuation pressure
Collection and light path system, it is characterised in that: visualization circulation loop includes cyclic water tank, heater, heat exchanger, main valve, electromagnetic current
Meter, by-passing valve, main valve, inlet pressure gauge, transparent centrifugal pump, delivery gauge, exhaust valve, throttle valve, thermometer, threeway
Valve, discharge casing, working medium water tank and coloring agent water tank, transparent centrifugal pump water inlet pass through pipeline and inlet pressure gauge, main valve, electricity
The lower end water outlet of magnetic flowmeter, main valve and cyclic water tank is sequentially connected；Transparent centrifugal pump water outlet passes through pipeline and outlet
Pressure gauge, exhaust valve, throttle valve, thermometer and triple valve right output port are sequentially connected；Triple valve left port is protruded by pipeline
Into cyclic water tank, triple valve lower port is connect by pipeline with discharge casing；Cyclic water tank right end water outlet passes through piping connection
It is connected to after by-passing valve on the pipeline between main valve and electromagnetic flowmeter；Heat exchange is equipped in right end water outlet inside cyclic water tank
Device；Heater is equipped with inside cyclic water tank between lower end water outlet and left end water inlet；Working medium water outlet of water tank passes through pipeline
It is connect with coloring agent water outlet of water tank, cyclic water tank left end water inlet is gone out by piping connection in working medium water tank and coloring agent water tank
On pipeline between the mouth of a river；Working medium water outlet of water tank, coloring agent water outlet of water tank and cyclic water tank left end water inlet are all provided with
There is throttle valve；Fluctuation pressure acquisition and light path system include light source, optical filter, Pulse Pressure with High Frequency sensor, shaft encoder, list
Piece machine, high-speed camera, computer, universal data collecting system and frequency converter；It is respectively provided on the left of transparent centrifugal pump with right side
There is light source；High-speed camera setting is arranged between high-speed camera and transparent centrifugal pump in transparent centrifugal pump front, optical filter；
Transparent centrifugal pump is sequentially connected with shaft encoder, single-chip microcontroller and high-speed camera；Universal data collecting system and transparent centrifugation
Pump connection, high-speed camera are connect with computer with universal data collecting system；Frequency converter is connect with transparent centrifugal pump.
2. a kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system according to claim 1, it is characterised in that:
The transparent centrifugal pump is cast using transparent PMMA material, and is processed by shot blasting to its surface.
3. a kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system according to claim 1 or 2, feature exist
In: the light source uses 532nm continuous laser generator, and the optical filter is the narrow pass filter of 532nm.
4. a kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system according to claim 1 or 2, feature exist
In: the fluctuation pressure acquires and light path system includes synchronizer, and synchronizer is separately connected high-speed camera, general data is adopted
Collecting system and computer.
5. a kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system according to claim 3, it is characterised in that:
The fluctuation pressure acquisition and light path system include synchronizer, and synchronizer is separately connected high-speed camera, universal data collection
System and computer.
6. a kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system according to claim 1 or 2, feature exist
In: water inlet, axis and the pressure tap of the transparent centrifugal pump use flange-silica gel-flange connection in the same side
Mode.
7. a kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system according to claim 3, it is characterised in that:
Water inlet, axis and the pressure tap of the transparent centrifugal pump use flange-silica gel-flange connection side in the same side
Formula.
8. a kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system according to claim 4, it is characterised in that:
Water inlet, axis and the pressure tap of the transparent centrifugal pump use flange-silica gel-flange connection side in the same side
Formula.
9. a kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system according to claim 5, it is characterised in that:
Water inlet, axis and the pressure tap of the transparent centrifugal pump use flange-silica gel-flange connection side in the same side
Formula.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108757505A (en) * | 2018-07-10 | 2018-11-06 | 哈尔滨工程大学 | A kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108757505A (en) * | 2018-07-10 | 2018-11-06 | 哈尔滨工程大学 | A kind of centrifugal pump flow field-pressure fluctuation coupling measurement experimental system |
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