CN104500414B - A kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test device - Google Patents
A kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test device Download PDFInfo
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- CN104500414B CN104500414B CN201410764789.8A CN201410764789A CN104500414B CN 104500414 B CN104500414 B CN 104500414B CN 201410764789 A CN201410764789 A CN 201410764789A CN 104500414 B CN104500414 B CN 104500414B
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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 a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test device, test delivery side of pump pipeline connects the flushing pipe with the second gate valve and biphase circulation line; The end of biphase circulation line stretches into biphase the letting out of the solid-liquid in water tank can in device; Water tank outlet passes through the first gate valve connecting test pump intake piping road; Primary particles dispenser includes imitative hourglass granule and throws in cup and conically shaped; Hourglass granule is thrown in cup and is arranged at the top of conically shaped; The entrance pipe of primary particles dispenser stretches into imitative hourglass granule and throws in cup, and the export pipeline that imitative hourglass granule throws in cup stretches in conically shaped; The outlet test pump intake piping road of conically shaped. Present configuration is simple, compact in design, and in experimentation, noise is little, power consumption is few, can be used under single-phase medium/solid-liquid two-phase flow state the testing experiments such as pump external characteristics, flow field; It is a kind of multi-functional, adapts to the centrifugal pump PIV experiment test device of kinds of experiments operating mode.
Description
Technical field
The present invention relates to a kind of centrifugal pump experimental provision, particularly relate to a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test device.
Background technology
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 when the multiphase flow containing solid particle, existing experimental provision must in water tank additional power source agitating device, just can make solid-liquid mix homogeneously, complete experiment, when testing grain density and being more much bigger than pumped (conveying) medium density, additional power mixing speed just requires significantly high, and high rotating speed will bring substantial amounts of bubble into so that experiment cannot complete even failed. Such device not only structure is complicated, and in experimentation, noise is big, it is many to consume electric energy, it is necessary to more granule can be only achieved certain solids volume concentration, adds the cost of experiment. In addition, when carrying out pump flow field PIV test it is difficult to ensure that what shoot is all the particle picture of the same runner of same position every time, the method often error equal with filming frequency by setting motor speed frequency is very big, because the rotating speed of motor is difficult to stable a fixed value, even if the stable frequency that can realize motor also is difficult to obtain, what photograph is all the particle picture of a certain blade angle every time.
Summary of the invention
It is an object of the invention to provide a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test device, to solve above-mentioned technical problem.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test device, including motor, test pump, primary particles dispenser and water tank; It is connected with speed regulator, rotary/shaft encoder and rotational speed and torque instrument in turn between motor and test pump; Test delivery side of pump pipeline connects the entrance rinsing pipe with the second gate valve and biphase circulation line; The end of biphase circulation line stretches into biphase the letting out of the solid-liquid in water tank can in device; The biphase bottom letting out energy device of solid-liquid is provided with downward-sloping export pipeline, and the end of export pipeline is that biphase the letting out of solid-liquid can export by device; Biphase the letting out of solid-liquid can device outlet be stretched in the water tank outlet bottom water tank, and water tank outlet passes through the first gate valve connecting test pump intake piping road; Primary particles dispenser includes imitative hourglass granule and throws in cup and conically shaped; Hourglass granule is thrown in cup and is arranged at the top of conically shaped; The export pipeline rinsing pipe with the second gate valve stretches into imitative hourglass granule and throws in cup, and the export pipeline that imitative hourglass granule throws in cup stretches in conically shaped; The export pipeline that imitative hourglass granule throws in cup is provided with the 3rd gate valve; Outlet (outlet of primary particles dispenser) the connection test pump intake piping road of conically shaped, the outlet of conically shaped is provided with the 4th gate valve.
Speed regulator is used for regulating motor speed; Rotary/shaft encoder is used for positioning impeller shooting angle and controlling blade camera site; Rotational speed and torque instrument is for measuring the rotational speed and torque of test pump.
Test delivery side of pump and with being disposed with discharge gage, effusion meter and the 5th gate valve between the flushing pipe of the second gate valve.
Biphase circulation line is provided with the 6th gate valve.
The end of biphase circulation line and biphase the letting out of solid-liquid device outlet can be loose structure.
The outlet of primary particles dispenser is tangential inlet with test junction, pump intake piping road.
The outer periderm solid-liquid of the end of biphase circulation line is biphase let out can device filter screen cylinder around.
Biphase the letting out of solid-liquid can device upper cylindrical portion be loose structure, and bottom is inverted cone-shaped.
Described nothing stirring solid-liquid two-phase centrifugal pump interior flow field PIV tests device and also includes solid particle recovery pipeline and solid particle recycling can; Test delivery side of pump pipeline connects solid particle and reclaims pipeline; Solid particle reclaims and is provided with the 7th gate valve on pipeline; Body granule reclaims the outlet of pipeline and stretches in Filter-screen bag, and Filter-screen bag is arranged in solid particle recycling can; It is loose structure that solid particle recovery pipeline stretches into the end of Filter-screen bag; Solid particle recycling can is connected with the bottom of water tank.
The present invention it is critical only that the porous form layout that circulation line exports has vented the biphase kinetic energy of most solid-liquid, it is unlikely to be involved in a large amount of bubble because flow velocity is too high and enters circulation line, and remaining liquid kinetic energy just can be let out can solid particle be brought in circulation line organ pipe road by the biphase circulation of solid-liquid, the biphase circulation of solid-liquid is let out energy device lower end and is adopted the design structure of inverted cone, when experimental facilities runs, the liquid stream that the biphase circulation of solid-liquid is let out in energy device produces enough shear rates, fluid various flows interlayer is mutually mixed due to the existence of speed difference, inhibit the automatic sedimentation of solid particle, achieve solid particle to mix with the automatic uniform of pumped (conveying) medium. additionally, the design structure of the imitative hourglass of granule delivery device can ensure that and evengranular is discharged in circulation line, the equally possible solid particle that achieves of the design structure of bottom inverted cone mixes with the automatic uniform of pumped (conveying) medium. finally, adding and the combination of PIV lock unit sum counter of rotary encoder, what shoot when being possible not only to ensure pump flow field PIV test is all the particle picture of the same runner of same position every time, and can set that the particle picture obtaining arbitrarily angled blade. this experimental provision can be used for the testing experiment such as the external characteristics of pump, flow field under single-phase medium state, can also be used for the external characteristics of pump under solid-liquid two-phase flow state and flow field test, it is a kind of multi-functional, adapts to the centrifugal pump PIV experiment test device of kinds of experiments operating mode.
Compared with prior art, the method have the advantages that
(1) present invention is a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test device, its simple in construction, compact in design, in experimentation, noise is little, power consumption is few, because solid particle only circulates in pipeline, so only needing less solid particle just can realize the test of higher concentration granule two phase flow, reduce the cost of experiment.
(2) this experimental provision can be used for the testing experiment such as pump external characteristics, flow field under single-phase medium state, can also be used for pump external characteristics and flow field test under solid-liquid two-phase flow state, it is a kind of multi-functional, adapts to the centrifugal pump PIV experiment test device of kinds of experiments operating mode.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation testing device without stirring solid-liquid two-phase centrifugal pump interior flow field PIV of the present invention.
Fig. 2 is primary particles dispenser partial view of the present invention.
Fig. 3 is that biphase the letting out of solid-liquid of the present invention can device partial view.
Fig. 4 is the present invention is that test pump divides partial view with motor coupling portion.
Wherein: 1 motor; 2 speed regulators; 3 rotary/shaft encoder; 4 torque and speed sensorses; 5 test pumps; 6,7 pressure transducer; 8 electromagnetic flowmeters; 9 the 5th gate valves; 10 the 7th gate valves; 11 Filter-screen bags; 12 solid particle recovery tube way outlets; 13 solid particle recycling cans; 14 the 6th gate valves; 15 filter screen cylinders; 16 solid-liquids are biphase lets out energy device; 17 biphase circulation lines; 18 water tanks; 19 can export by device for biphase the letting out of solid-liquid; 20 first gate valves; 21 second gate valves; 22 imitative hourglass granules throw in cup; 23 the 3rd gate valves; 24 primary particles dispensers; 25 the 4th gate valves.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Referring to shown in Fig. 1 to Fig. 4, one of the present invention is without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test dress, including motor 1, test pump 5, primary particles dispenser 24 and water tank 18.
It is connected with the speed regulator 2 for regulating motor 1 rotating speed in turn, for positioning impeller shooting angle and controlling the rotary/shaft encoder 3 of 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 recovery pipeline 12 of test pump 5, the flushing pipe with the second gate valve 21 and biphase circulation line 17; Test the outlet of pump 5 and be disposed with discharge gage 6, effusion meter 8, gate valve 9 with between the entrance rinsing pipe of the second gate valve 21; The export pipeline rinsing pipe is provided with the second gate valve 21; Solid particle reclaims and is provided with the 7th gate valve 10 on the pipeline of pipeline 12; Biphase circulation line 17 is provided with the 6th gate valve 14.
Solid particle reclaims the outlet of pipeline 12 and stretches in Filter-screen bag 11, and Filter-screen bag 11 is arranged in solid particle recycling can 13. It is loose structure that solid particle recovery pipeline 12 stretches into the end of Filter-screen bag 11.
The loose structure end of biphase circulation line 17 stretch into the solid-liquid in water tank 18 biphase let out can in device 16, the outer periderm solid-liquid of the loose structure end of biphase circulation line 17 is biphase let out can device 16 filter screen cylinder 15 around. Solid particle recycling can 13 is connected with the bottom of water tank 18. The biphase bottom letting out energy device 16 of solid-liquid is provided with downward-sloping export pipeline, and biphase the letting out of solid-liquid that the end of export pipeline is loose structure can export 19 by device; Biphase the letting out of solid-liquid can device outlet 19 be stretched in the water tank outlet bottom water tank 18, the water tank outlet entrance pipe by the first gate valve 20 connecting test pump 5. Solid-liquid is biphase to be let out and device 16, biphase circulation line 17 can be designed as 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 tank 18, continues to stay in pipeline and circulates. Biphase the letting out of solid-liquid can be designed as porous form by device 16 upper cylindrical portion, pumped (conveying) medium can freely come in and go out in water tank 18, biphase the letting out of solid-liquid can device 16 bottom design be inverted cone-shaped, the biphase pipeline letting out energy device 16 outlet and water tank 18 entrance of solid-liquid is an inclination pipeline, tube outlet is designed as porous form, the position fillet of pipeline corner.
Primary particles dispenser includes imitative hourglass granule and throws in cup 22 and conically shaped;Hourglass granule is thrown in cup 22 and is arranged at the top of conically shaped; The export pipeline rinsing pipe with the second gate valve 21 stretches into imitative hourglass granule and throws in cup 22, and the export pipeline that imitative hourglass granule throws in cup 22 stretches in conically shaped; The export pipeline that imitative hourglass granule throws in cup 22 is provided with the 3rd gate valve 23, and imitative hourglass granule is thrown in the export pipeline of cup 22 and exported lower than liquid level 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 outlet and the entrance pipe junction testing pump 5 are designed as tangential inlet.
When PIV experiment test carries out, test pump 5 operates, rotary encoder 3 often encloses and sends three road pulse signals, one or two road signals are used for determining rotary speed direction, being simultaneously emitted by the pulse number fixed, three road signals are used for determining the initial position that signal sends, and three road signals pass to enumerator, pass to PIV lock unit again, ensure that what photograph is the particle picture of the same impeller channel of same position by adjusting the umber of pulse of camera, laser and triggering every time. Solid-liquid is biphase to be let out can liquid be vortex movement in device 16, make use of the feature of eddy-currents to produce enough tangential velocities, and different fluid layers are mutually mixed, it is achieved that the automatic uniform of solid-liquid mixes. Test pump 5 uses transparent material to make, and during shooting, camera is assumed to become plumbness with laser before test pump 5, and all parameters can be carried out PIV experiment after setting and test.
The operation 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 when the multiphase flow 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 provision, the 4th gate valve 25 is opened by primary particles dispenser 24 to be slowly added to the solid particle to mix according to requirement of experiment, trace particle is (if density of solid particles is less than pumped (conveying) medium density, then need to open the second gate valve 21), hybrid particles is mixed into circulation line for the first time by the inverted cone design of granule dispenser 24, arrival solid-liquid is biphase to be let out in energy device 16, major part kinetic energy is vented, avoid owing to the biphase high speed impact of solid-liquid is involved in bubble, biphase the letting out of solid-liquid can device 16 internal liquid be vortex movement, produce enough tangential velocities, different fluid layers are mutually mixed, achieve the automatic uniform mixing of solid-liquid. the heterogeneous fluid of mix homogeneously enters the inlet ductwork of test pump 5 by tilting pipeline, carry out the interior flow field PIV test experiments of test pump 5, after system run all right, set PIV and test the parameters of 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 can be obtained by under different operating mode in impeller channel. close the 4th gate valve the 25, the 6th gate valve 14 after experiment, open the 7th gate valve 10, carry out fluid circulation and entrain the pellets into by testing pump 5 and the Filter-screen bag 11 of solid particle recycling can 13 is filtered reclaim particle.
Claims (9)
1. test device without stirring solid-liquid two-phase centrifugal pump interior flow field PIV for one kind, it is characterised in that include motor (1), test pump (5), primary particles dispenser (24) and water tank (18);
It is connected with speed regulator (2), rotary/shaft encoder (3) and rotational speed and torque instrument (4) in turn between motor (1) and test pump (5);
The export pipeline of test pump (5) connects the entrance rinsing pipe with the second gate valve (21) and biphase circulation line (17);
The end of biphase circulation line (17) stretches into biphase the letting out of the solid-liquid in water tank (18) can in device (16); The biphase bottom letting out energy device (16) of solid-liquid is provided with downward-sloping export pipeline, and the end of export pipeline is that biphase the letting out of solid-liquid can export (19) by device; Biphase the letting out of solid-liquid can be stretched in the water tank outlet bottom water tank (18) by device outlet (19), the water tank outlet entrance pipe by the first gate valve (20) connecting test pump (5);
Primary particles dispenser includes imitative hourglass granule and throws in cup (22) and conically shaped; Hourglass granule is thrown in cup (22) and is arranged at the top of conically shaped; The export pipeline rinsing pipe with the second gate valve (21) stretches into imitative hourglass granule and throws in cup (22), and the export pipeline that imitative hourglass granule throws in cup (22) stretches in conically shaped; The export pipeline that imitative hourglass granule 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 test device, it is characterised in that speed regulator (2) is used for regulating motor (1) rotating speed; Rotary/shaft encoder (3) is used for positioning impeller shooting angle and controlling blade camera site; Rotational speed and torque instrument (4) is used 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 test device, it is characterized in that, between outlet and the flushing pipe with the second gate valve (21) of test pump (5), be disposed with discharge gage (6), effusion meter (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 test device, it is characterised in that biphase circulation line (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 test device, it is characterised in that the end of biphase circulation line (17) and biphase the letting out of solid-liquid can be loose structure by device outlet (19).
6. according to claim 1 a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test device, it is characterised in that it is tangential inlet that primary particles dispenser (24) exports the entrance pipe junction with test pump (5).
7. according to claim 1 a kind of without stirring solid-liquid two-phase centrifugal pump interior flow field PIV test device, it is characterized in that, the outer periderm solid-liquid of the end of biphase circulation line (17) is biphase let out can device (16) filter screen cylinder (15) around.
8. the one according to claim 1 or 7 tests device without stirring solid-liquid two-phase centrifugal pump interior flow field PIV, it is characterised in that biphase the letting out of solid-liquid can device (16) upper cylindrical portion be loose structure, 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 test device, it is characterized in that, described nothing stirring solid-liquid two-phase centrifugal pump interior flow field PIV tests device and also includes solid particle recovery pipeline (12) and solid particle recycling can (13); The export pipeline of test pump (5) connects solid particle and reclaims pipeline (12); Solid particle reclaims and is provided with the 7th gate valve (10) on pipeline (12); Solid particle reclaims the outlet of pipeline (12) and stretches in Filter-screen bag (11), and Filter-screen bag (11) is arranged in solid particle recycling can (13);It is loose structure that solid particle recovery pipeline (12) stretches into the end of Filter-screen bag (11); Solid particle recycling can (13) is connected with the bottom of water tank (18).
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| Application Number | Priority Date | Filing Date | Title |
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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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| 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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| CN104500414B true CN104500414B (en) | 2016-06-08 |
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Effective date of registration: 20210401 Address after: 313012 No.88 yaoweimu, nijiatan village, Shuanglin Town, Nanxun District, Huzhou City, Zhejiang Province Patentee after: HUZHOU ZHONGCHUANG XIAOWEI PIONEER PARK ENTERPRISE MANAGEMENT Co.,Ltd. Address before: Beilin District Xianning West Road 710049, Shaanxi city of Xi'an province No. 28 Patentee before: XI'AN JIAOTONG University |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
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 |