CN104500414A - Internal flow field PIV (Peak Inverse Voltage) testing device of stirring-free solid-liquid two-phase centrifugal pump - Google Patents
Internal flow field PIV (Peak Inverse Voltage) testing device of stirring-free solid-liquid two-phase centrifugal pump Download PDFInfo
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- CN104500414A CN104500414A CN201410764789.8A CN201410764789A CN104500414A CN 104500414 A CN104500414 A CN 104500414A CN 201410764789 A CN201410764789 A CN 201410764789A CN 104500414 A CN104500414 A CN 104500414A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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Abstract
The invention discloses an internal flow field PIV (Peak Inverse Voltage) testing device of a stirring-free solid-liquid two-phase centrifugal pump. An outlet pipeline of a test pump is connected with a flushing pipe with a second gate valve and a two-phase circulation pipeline; the tail end of the two-phase circulation pipeline extends into a solid-liquid two-phase energy releaser in a water storage tank; an outlet pipe of the water storage tank is connected with an inlet pipeline of the test pump by virtue of the first gate valve; a primary particle feeding device comprises a sandglass-like particle feeding cup and a conical barrel; the sandglass-like particle feeding cup is arranged at the top of the conical barrel; an inlet pipeline of the primary particle feeding device extends into the sandglass-like particle feeding cup, and an outlet pipeline of the sandglass-like particle feeding cup extends into the conical barrel; The outlet of the conical barrel is communicated with the inlet pipeline of the test pump. The internal flow field PIV testing device is simple in structure, compact in layout, small in noise in an experiment process and less in power consumption, and can be applied to experiments for testing the external characteristics, internal flow field and the like of the pump under a single-phase medium/solid-liquid two-phase flow state, thereby being a multifunctional centrifugal pump PIV experiment testing device applicable to various experiment conditions.
Description
Technical field
The present invention relates to a kind of centrifugal pump experimental setup, particularly relating to a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus.
Background technique
At present, when carrying out the interior flow field PIV test experiments of pump, operating condition of test is complicated, when especially carrying out the test of pump under the multiphase flow condition containing solid particle, existing experimental setup must add power source stirring apparatus in water storage tank, and solid-liquid just can be made to mix, complete experiment, when particle tested density ratio fed sheet of a media density is much bigger, additional power mixing speed just requires very high, and high rotating speed will bring a large amount of bubbles into, experiment cannot be completed even failed.Such device not only complex structure, and in experimentation, noise is large, consumption electric energy is many, needs more particle just can reach certain solids volume concentration, adds the cost of experiment.In addition, what be difficult to ensure each shooting when carrying out pump flow field PIV and testing is all the particle picture of the same runner of same position, often error is very large for the method equal with filming frequency by setting motor speed frequency, because the rotating speed of motor is difficult to be stabilized in a fixed value, even if the stabilized frequency that can realize motor is also difficult to that acquisition photographs is all the particle picture of a certain blade angle at every turn.
Summary of the invention
The object of this invention is to provide a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, to solve the problems of the technologies described above.
To achieve these goals, the present invention adopts following technological scheme:
A kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, comprise motor, test pump, primary particles dispenser and water storage tank; Speed regulator, rotary/shaft encoder and rotational speed and torque instrument is connected with in turn between motor and test pump; The export pipeline of the cleaning hose of test delivery side of pump pipeline connecting band second gate valve and two-phase circulation loop; The end solid-liquid two-phase stretched in water storage tank of two-phase circulation loop is let out in energy device; The bottom that solid-liquid two-phase lets out energy device is provided with downward-sloping export pipeline, and the end of export pipeline is that solid-liquid two-phase is let out and can be exported by device; Solid-liquid two-phase is let out and can device outlet be stretched in the water storage tank outer pipe bottom water storage tank, and water storage tank outer pipe is by the first gate valve connecting test pump intake piping road; Primary particles dispenser comprises imitative hourglass particle and throws in cup and conically shaped; Hourglass particle throws in the top that cup is arranged at conically shaped; The export pipeline of the cleaning hose with the second gate valve stretches into imitative hourglass particle and throws in cup, and the export pipeline that imitative hourglass particle throws in cup stretches in conically shaped; The export pipeline that imitative hourglass particle throws in cup is provided with the 3rd gate valve; The outlet (outlet of primary particles dispenser) of conically shaped is communicated with test pump intake piping road, and the outlet of conically shaped is provided with the 4th gate valve.
Speed regulator is for regulating motor speed; Rotary/shaft encoder is for locating impeller angle of shooting and controlling blade camera site; Rotational speed and torque instrument is for measuring the rotational speed and torque of test pump.
Discharge gage, flowmeter and the 5th gate valve is disposed with between the cleaning hose of test delivery side of pump and band the second gate valve.
Two-phase circulation loop is provided with the 6th gate valve.
The end of two-phase circulation loop and solid-liquid two-phase are let out and device outlet can be porous structure.
The outlet of primary particles dispenser is tangential inlet with test joint, pump intake piping road.
The outer periderm solid-liquid two-phase of the end of two-phase circulation loop let out can device filter screen cylinder around.
It can device upper cylindrical portion be porous structure that solid-liquid two-phase is let out, and bottom is inverted cone-shaped.
Described nothing stirs solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus and also comprises solid particle reclaim line and solid particle recycling can; Test delivery side of pump pipeline connects solid particle reclaim line; Solid particle reclaim line is provided with the 7th gate valve; The outlet of body particle reclaim line is stretched in Filter-screen bag, and Filter-screen bag is arranged in solid particle recycling can; The end that solid particle reclaim line stretches into Filter-screen bag is porous structure; Solid particle recycling can is connected with the bottom of water storage tank.
Key of the present invention is that the porous form layout that circulation loop exports has vented most solid-liquid two-phase kinetic energy, be unlikely to be involved in a large amount of bubble because flow velocity is too high and enter circulation loop, and remaining liquid kinetic energy just can be let out can solid particle is brought in circulation loop organ pipe road by the circulation of solid-liquid two-phase, the project organization that energy device lower end adopts inverted cone is let out in the circulation of solid-liquid two-phase, when experimental facilities runs, enough shearing speeds are given birth in the liquid miscarriage that the circulation of solid-liquid two-phase is let out in energy device, fluid various flows interlayer mixes mutually due to the existence of speed difference, inhibit the automatic sedimentation of solid particle, achieve solid particle to mix with the automatic uniform of fed sheet of a media.In addition, the project organization that particle delivery device imitates hourglass can ensure evengranularly to be discharged in circulation loop, and the project organization of bottom inverted cone can achieve solid particle equally and mix with the automatic uniform of fed sheet of a media.Finally, rotating coder add the combination with PIV synchronizer sum counter, what not only can ensure that pump flow field PIV takes when testing at every turn is all the particle picture of the same runner of same position, and can set the particle picture obtaining arbitrarily angled blade.This experimental setup can be used for the testing experiment such as external characteristics, flow field of pump under single-phase medium state, also can be used for external characteristics and the flow field test of pump under solid-liquid two-phase flow state, be a kind of multi-functional, adapt to the centrifugal pump PIV experiment testing apparatus of kinds of experiments operating mode.
Compared with prior art, the present invention has following beneficial effect:
(1) the present invention is a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, its structure is simple, compact in design, in experimentation, noise is little, power consumption is few, because solid particle only circulates in pipeline, so only need less solid particle just can realize the test of higher concentration particle two phase flow, reduce the cost of experiment.
(2) this experimental setup can be used for the testing experiment such as pump external characteristics, flow field under single-phase medium state, also can be used for pump external characteristics and flow field test under solid-liquid two-phase flow state, be a kind of multi-functional, adapt to the centrifugal pump PIV experiment testing apparatus of kinds of experiments operating mode.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus of the present invention.
Fig. 2 is primary particles dispenser partial view of the present invention.
Fig. 3 is that solid-liquid two-phase of the present invention lets out energy device partial view.
Fig. 4 is the present invention is test Pump and Electromotor attachment portion partial view.
Wherein: 1 motor; 2 speed regulators; 3 rotary/shaft encoder; 4 torque and speed sensorses; 5 test pumps; 6,7 pressure transducers; 8 electromagnetic flowmeters; 9 the 5th gate valves; 10 the 7th gate valves; 11 Filter-screen bags; 12 solid particle reclaim line outlets; 13 solid particle recycling cans; 14 the 6th gate valves; 15 filter screen cylinders; 16 solid-liquid two-phases let out energy device; 17 two-phase circulation loops; 18 water storage tanks; 19 let out can export by device for solid-liquid two-phases; 20 first gate valves; 21 second gate valves; 22 imitative hourglass particles throw in cup; 23 the 3rd gate valves; 24 primary particles dispensers; 25 the 4th gate valves.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Refer to shown in Fig. 1 to Fig. 4, the present invention is a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test dress, comprises motor 1, test pump 5, primary particles dispenser 24 and water storage tank 18.
The speed regulator 2 for regulating motor 1 rotating speed is connected with in turn, for locating the rotary/shaft encoder 3 of impeller angle of shooting and control blade camera site, for measuring the rotational speed and torque instrument 4 of the rotational speed and torque of test pump 5 between motor 1 and test pump 5.
The export pipeline connection solid particle reclaim line 12 of test pump 5, the cleaning hose with the second gate valve 21 and two-phase circulation loop 17; Discharge gage 6, flowmeter 8, gate valve 9 is disposed with between the export pipeline of the outlet of test pump 5 and the cleaning hose of band the second gate valve 21; The export pipeline of cleaning hose is provided with the second gate valve 21; The pipeline of solid particle reclaim line 12 is provided with the 7th gate valve 10; Two-phase circulation loop 17 is provided with the 6th gate valve 14.
The outlet of solid particle reclaim line 12 is stretched in Filter-screen bag 11, and Filter-screen bag 11 is arranged in solid particle recycling can 13.The end that solid particle reclaim line 12 stretches into Filter-screen bag 11 is porous structure.
The porous structure end solid-liquid two-phase stretched in water storage tank 18 of two-phase circulation loop 17 is let out can in device 16, the outer periderm solid-liquid two-phase of porous structure end of two-phase circulation loop 17 let out can device 16 filter screen cylinder 15 around.Solid particle recycling can 13 is connected with the bottom of water storage tank 18.Solid-liquid two-phase is let out and the bottom of device 16 can be provided with downward-sloping export pipeline, and the end of export pipeline is that the solid-liquid two-phase of porous structure lets out can device outlet 19; Solid-liquid two-phase is let out and can device outlet 19 be stretched in the water storage tank outer pipe bottom water storage tank 18, and water storage tank outer pipe is by the entrance pipe of the first gate valve 20 connecting test pump 5.Solid-liquid two-phase lets out energy device 16, two-phase circulation loop 17 is designed to porous form, and the unnecessary kinetic energy of major part is vented, and filter screen cylinder 15 can ensure that solid particle does not escape in water storage tank 18, continues to stay in pipeline and circulates.Solid-liquid two-phase is let out and can be designed to porous form by device 16 upper cylindrical portion, fed sheet of a media can freely be come in and gone out in water storage tank 18, it can device 16 bottom design be inverted cone-shaped that solid-liquid two-phase is let out, it can device 16 outlet be an inclination pipeline with the pipeline of water storage tank 18 entrance that solid-liquid two-phase is let out, tube outlet is designed to porous form, the position fillet of pipeline corner.
Primary particles dispenser comprises imitative hourglass particle and throws in cup 22 and conically shaped; Hourglass particle throws in the top that cup 22 is arranged at conically shaped; The export pipeline of the cleaning hose with the second gate valve 21 stretches into imitative hourglass particle and throws in cup 22, and the export pipeline that imitative hourglass particle throws in cup 22 stretches in conically shaped; The export pipeline that imitative hourglass particle throws in cup 22 is provided with the 3rd gate valve 23, and imitative hourglass particle throws in the export pipeline outlet of cup 22 lower than liquid level height in conically shaped.The entrance pipe of the outlet test pump 5 of conically shaped, the outlet of conically shaped is provided with the 4th gate valve 25.Primary particles dispenser 24 exports and is designed to tangential inlet with the entrance pipe joint of test pump 5.
When PIV experiment test is carried out, test pump 5 operates, rotating coder 3 often encloses and sends three road pulse signals, one or two road signals are used for determining rotary speed direction, send fixing pulse number, three road signals are used for the initial position determining that signal sends, and three road signals pass to counter simultaneously, pass to PIV synchronizer again, what ensure to photograph by the umber of pulse of adjustment camera, laser and triggering is the particle picture of the same impeller channel of same position at every turn.It is vortex movement that solid-liquid two-phase lets out liquid in energy device 16, and the feature that make use of eddy-currents produces enough tangential velocities, and different fluid layer mixes mutually, achieves the automatic uniform mixing of solid-liquid.Test pump 5 uses transparent material to make, and during shooting, camera is supposed to become plumbness with laser before test pump 5, and all optimum configurations well just can carry out PIV experiment afterwards and test.
Working principle of the present invention is as follows:
As shown in Figure 1, when carrying out the PIV interior flow field test experiments of pump under the multiphase flow condition containing solid particle, open inlet ductwork first gate valve 20 of test pump 5, export pipeline the 5th gate valve 9 and the 6th gate valve 14, open motor 1, start test pump 5, pump testing 5 to be measured reaches setting speed, after each stable equipment operation of experimental setup, experimentally require to open the 4th gate valve 25 by primary particles dispenser 24 slowly to add the solid particle that will mix, trace particle is (if density of solid particles is less than fed sheet of a media density, then need to open the second gate valve 21), hybrid particles is mixed into circulation loop for the first time by the inverted cone design of particle dispenser 24, arriving solid-liquid two-phase lets out in energy device 16, major part kinetic energy is vented, avoid because solid-liquid two-phase high speed impact is involved in bubble, it can device 16 internal liquid be vortex movement that solid-liquid two-phase is let out, produce enough tangential velocities, different fluid layer mixes mutually, achieve the automatic uniform mixing of solid-liquid.The heterogeneous fluid mixed enters the inlet ductwork of test pump 5 by inclination pipeline, carry out the interior flow field PIV test experiments testing pump 5, after system run all right, set the parameters of PIV testing software, use external trigger pattern, carry out the PIV test of an operating mode.Change experiment condition, repeat the flow field particle picture that above step just can obtain under different operating mode in impeller channel.Close the 4th gate valve 25, the 6th gate valve 14 after experiment, open the 7th gate valve 10, carry out fluid circulation by test pump 5 and particle brought in the Filter-screen bag 11 of solid particle recycling can 13 and carry out filtered and recycled particle.
Claims (9)
1. without stirring a solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, it is characterized in that, comprising motor (1), test pump (5), primary particles dispenser (24) and water storage tank (18);
Speed regulator (2), rotary/shaft encoder (3) and rotational speed and torque instrument (4) is connected with in turn between motor (1) and test pump (5);
The export pipeline of the cleaning hose of export pipeline connecting band second gate valve (21) of test pump (5) and two-phase circulation loop (17);
The end solid-liquid two-phase stretched in water storage tank (18) of two-phase circulation loop (17) is let out in energy device (16); The bottom that solid-liquid two-phase lets out energy device (16) is provided with downward-sloping export pipeline, and the end of export pipeline is that solid-liquid two-phase is let out and can be exported (19) by device; Solid-liquid two-phase is let out and can be stretched in the water storage tank outer pipe of water storage tank (18) bottom by device outlet (19), and water storage tank outer pipe is by the entrance pipe of the first gate valve (20) connecting test pump (5);
Primary particles dispenser comprises imitative hourglass particle and throws in cup (22) and conically shaped; Hourglass particle throws in the top that cup (22) is arranged at conically shaped; The export pipeline of the cleaning hose with the second gate valve (21) stretches into imitative hourglass particle and throws in cup (22), and the export pipeline that imitative hourglass particle throws in cup (22) stretches in conically shaped; The export pipeline that imitative hourglass particle throws in cup (22) is provided with the 3rd gate valve (23); The entrance pipe of outlet test pump (5) of conically shaped, the outlet of conically shaped is provided with the 4th gate valve (25).
2. according to claim 1 a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, it is characterized in that, speed regulator (2) is for regulating motor (1) rotating speed; Rotary/shaft encoder (3) is for locating impeller angle of shooting and controlling blade camera site; Rotational speed and torque instrument (4) is for measuring the rotational speed and torque of test pump (5).
3. according to claim 1 a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, it is characterized in that, between the outlet of test pump (5) and the cleaning hose of band the second gate valve (21), be disposed with discharge gage (6), flowmeter (8) and the 5th gate valve (9).
4. according to claim 3 a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, it is characterized in that, two-phase circulation loop (17) is provided with the 6th gate valve (14).
5. according to claim 1 a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, it is characterized in that, the end of two-phase circulation loop (17) and solid-liquid two-phase let out energy device outlet (19) be porous structure.
6. according to claim 1 a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, it is characterized in that, primary particles dispenser (24) outlet is tangential inlet with the entrance pipe joint of test pump (5).
7. according to claim 1 a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, it is characterized in that, the outer periderm solid-liquid two-phase of the end of two-phase circulation loop (17) let out can device (16) filter screen cylinder (15) around.
8. the one according to claim 1 or 7 is without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, and it is characterized in that, it can device (16) upper cylindrical portion be porous structure that solid-liquid two-phase is let out, and bottom is inverted cone-shaped.
9. according to claim 4 a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus, it is characterized in that, described nothing stirs solid-liquid two-phase centrifugal pump interior flow field PIV testing apparatus and also comprises solid particle reclaim line (12) and solid particle recycling can (13); The export pipeline of test pump (5) connects solid particle reclaim line (12); Solid particle reclaim line (12) is provided with the 7th gate valve (10); The outlet of solid particle reclaim line (12) is stretched in Filter-screen bag (11), and Filter-screen bag (11) is arranged in solid particle recycling can (13); The end that solid particle reclaim line (12) stretches into Filter-screen bag (11) is porous structure; Solid particle recycling can (13) is connected with the bottom of water storage tank (18).
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| CN201410764789.8A CN104500414B (en) | 2014-12-11 | 2014-12-11 | A kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test device |
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Cited By (11)
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| CN106050684A (en) * | 2016-05-31 | 2016-10-26 | 江苏大学 | High-speed photographing test stand for coarse particle solid-liquid two-phase flow in centrifugal pump |
| CN106512893A (en) * | 2016-11-10 | 2017-03-22 | 镇江东方生物工程设备技术有限责任公司 | Multipurpose stirring type reactor device easy to observe |
| CN107402115A (en) * | 2017-07-13 | 2017-11-28 | 河海大学 | A kind of portable particle sowing apparatus and automatic spreading method |
| CN107561310A (en) * | 2017-08-31 | 2018-01-09 | 北京航空航天大学 | Rotate PIV method of testings and system |
| CN107703325A (en) * | 2017-10-18 | 2018-02-16 | 哈尔滨工程大学 | A kind of trace particle sowing apparatus and operating method for Two-Phase Flow Field PIV measurements |
| CN108097139A (en) * | 2017-12-05 | 2018-06-01 | 芜湖市诺康生物科技有限公司 | A kind of solid-liquid drug mixing arrangement |
| CN108593254A (en) * | 2018-05-21 | 2018-09-28 | 三峡大学 | It is a kind of to track the device for measuring particle trajectory and vortex intensity based on PIV technologies |
| CN109883872A (en) * | 2019-03-25 | 2019-06-14 | 浙江理工大学 | A kind of flow passage components abrasion experiment device of Solid-fluid Two-phase Flow |
| CN112228358A (en) * | 2020-09-23 | 2021-01-15 | 江苏大学 | Solid-liquid two-phase flow pump four-quadrant characteristic test bed |
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| CN106050684A (en) * | 2016-05-31 | 2016-10-26 | 江苏大学 | High-speed photographing test stand for coarse particle solid-liquid two-phase flow in centrifugal pump |
| CN106512893B (en) * | 2016-11-10 | 2019-04-02 | 镇江东方生物工程设备技术有限责任公司 | A kind of easily observation, multiduty stirring reactor device |
| CN106512893A (en) * | 2016-11-10 | 2017-03-22 | 镇江东方生物工程设备技术有限责任公司 | Multipurpose stirring type reactor device easy to observe |
| CN107402115A (en) * | 2017-07-13 | 2017-11-28 | 河海大学 | A kind of portable particle sowing apparatus and automatic spreading method |
| CN107561310A (en) * | 2017-08-31 | 2018-01-09 | 北京航空航天大学 | Rotate PIV method of testings and system |
| CN107703325B (en) * | 2017-10-18 | 2020-06-16 | 哈尔滨工程大学 | Tracer particle scattering device for two-phase flow field PIV measurement and operation method |
| CN107703325A (en) * | 2017-10-18 | 2018-02-16 | 哈尔滨工程大学 | A kind of trace particle sowing apparatus and operating method for Two-Phase Flow Field PIV measurements |
| CN108097139A (en) * | 2017-12-05 | 2018-06-01 | 芜湖市诺康生物科技有限公司 | A kind of solid-liquid drug mixing arrangement |
| CN108593254A (en) * | 2018-05-21 | 2018-09-28 | 三峡大学 | It is a kind of to track the device for measuring particle trajectory and vortex intensity based on PIV technologies |
| CN109883872A (en) * | 2019-03-25 | 2019-06-14 | 浙江理工大学 | A kind of flow passage components abrasion experiment device of Solid-fluid Two-phase Flow |
| CN112228358A (en) * | 2020-09-23 | 2021-01-15 | 江苏大学 | Solid-liquid two-phase flow pump four-quadrant characteristic test bed |
| CN112816379A (en) * | 2020-12-31 | 2021-05-18 | 江苏大学 | Device and method for measuring particle concentration of solid-liquid two-phase flow pump based on electric signals |
| CN114112472A (en) * | 2021-12-03 | 2022-03-01 | 上海交通大学 | Solid particle vertical pipeline conveying indoor test system |
| CN114112472B (en) * | 2021-12-03 | 2023-02-03 | 上海交通大学 | Solid particle vertical pipeline conveying indoor test system |
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Denomination of invention: A PIV test device for measuring the internal flow field of a solid-liquid two-phase centrifugal pump without stirring Effective date of registration: 20230321 Granted publication date: 20160608 Pledgee: Zhejiang Nanxun Rural Commercial Bank branch Shuanglin Limited by Share Ltd. Pledgor: HUZHOU ZHONGCHUANG XIAOWEI PIONEER PARK ENTERPRISE MANAGEMENT Co.,Ltd. Registration number: Y2023330000575 |
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