CN203532332U - Inlet device for cross-section PIV flow field measurement of impeller inlet of axial flow pump - Google Patents
Inlet device for cross-section PIV flow field measurement of impeller inlet of axial flow pump Download PDFInfo
- Publication number
- CN203532332U CN203532332U CN201320166129.0U CN201320166129U CN203532332U CN 203532332 U CN203532332 U CN 203532332U CN 201320166129 U CN201320166129 U CN 201320166129U CN 203532332 U CN203532332 U CN 203532332U
- Authority
- CN
- China
- Prior art keywords
- bend pipe
- runner envelope
- boss
- bent pipe
- axial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
An inlet device for cross-section PIV flow field measurement of an impeller inlet of an axial flow pump comprises a first bent pipe, a second bent pipe and a runner chamber, wherein two ends of the runner chamber are respectively connected with the first bent pipe and the second bent pipe in a sealed way, a pump shaft passes through the first bent pipe and the rubber chamber, a guide blade and an impeller inside the runner chamber are fixed on the pump shaft in sequence, the end face center of the joint between the first bent pipe and the runner chamber is on the axis of the runner chamber and the end face center of the joint between the second bent pipe and the runner chamber is also on the axis of the runner chamber; and the external pipe wall of a bent section of the second bent pipe is equipped with a boss, a through hole is disposed on the boss, the through hole is respectively to the second bent pipe and the inner chamber of the runner chamber and the external end face of the boss is equipped with an organic glass sheet. In the utility model, an water inlet structure of the axial flow pump is improved, PIV flow field shooting at a cross section at a direction at the impeller inlet of the axial flow pump which is perpendicular to the axis can be completed smoothly, reality of an incoming flow can be ensured to a very high extent and measurement precision of PIV is increased.
Description
Technical field
The utility model relates to a kind of inlet means of axial-flow pump, is mainly used in PIV test in flow field on the vertical pump shaft shaft section of axial-flow pump impeller import.
Background technique
Particle Image Velocimetry (PIV) is a kind of new internal flowing test technology that developed recently gets up.Because PIV measurement belongs to non-contact measurement means, not only there is the not feature of interference flowing field, also there is higher validity and resolution, the fluidised form that more can obtain whole distributes.
The feature of axial-flow pump is large flow, low lift.On the large hydraulic engineerings such as the south water to north and defence equipment, be employed extensively.
PIV measuring technology has been used to the interior flow field research of axial-flow pump at present.Yangzhou University's master thesis " 3D-PIV of axial-flow pump impeller exit flow field measures " (2005), " 3D-PIV of axial-flow pump impeller and stator interior flow field measures " (2006) and Shanghai Communications University's master thesis " numerical simulation of axial-flow pump flow field and PIV experimental research " (2008) have all carried out PIV test to axial-flow pump interior flow field, yet the Different Plane that above-mentioned scholar also just crosses axis for axial-flow pump inside is studied, and the cross section perpendicular to axis is not carried out to PIV test.Axial-flow pump impeller inlet flow field is larger to axial-flow pump performance impact.Due to axial-flow pump import come flow path direction consistent with axis, make axial-flow pump import cause great difficulty perpendicular to the PIV test on the cross section of axis.
Model utility content
For axial-flow pump import is carried out to PIV test perpendicular to the flow field on pump shaft axis cross section, the utility model provides a kind of axial-flow pump inlet means, and this installs, and not only engineering cost is low, and stream field destroys little.
The utility model is that the technological scheme that its technical problem of solution adopts is: a kind of inlet means for axial-flow pump impeller import cross section PIV flow field survey, comprise the first bend pipe, the second bend pipe and runner envelope, two ends respectively with the first bend pipe and second bend pipe of runner envelope are tightly connected, pump shaft is through the first bend pipe and runner envelope, diffuser in runner envelope and impeller are fixed on pump shaft successively, the first bend pipe and runner envelope be at the end face center of joint on the axis at runner envelope, and the second bend pipe and runner envelope are on the end face center of the joint also axis at runner envelope; The bending section outer tube wall of the second bend pipe is provided with boss, has through hole on boss, and through hole connects with the inner chamber of the second bend pipe and runner envelope respectively, and the place, exterior edge face of boss is provided with plexiglass sheet.
In such scheme, in order to guarantee the sealing of bend pipe, can between plexiglass sheet and boss exterior edge face, one rubber pad be set, plexiglass sheet and rubber pad are bolted to connection on the exterior edge face of boss.
In such scheme, boss is positioned at the second bend pipe since the crooked outer tube wall of the bending section 1/6 ~ 1/4 of the 4th flange plate one side.
In such scheme, the two ends of runner envelope are distributed with the first flange plate and the second flange plate, and wherein the first flange plate is threaded with the three-flange dish of the first bend pipe end, and the second flange plate is threaded with the 4th flange plate of the second bend pipe end.
Useful result of the present utility model is: improved axial-flow pump water inlet structure, make the PIV flow field on axial-flow pump impeller import vertical axis direction cross section take and can complete smoothly, and the change of structure is very little to the destructiveness of the true incoming flow of axial-flow pump, the authenticity of the assurance incoming flow of high level very, has improved the measuring accuracy of PIV.
Accompanying drawing explanation
Below in conjunction with accompanying drawing with to further explanation in further detail of the technical solution of the utility model.
Fig. 1 is axial-flow pump inlet means structural representation of the present utility model.
Fig. 2 is axial-flow pump inlet means right elevation of the present utility model.
Fig. 3 is that axial-flow pump inlet means of the present utility model carries out the structure principle chart of flow field PIV while measuring.
1. first bend pipes in figure, 11. three-flange dishes, 12. pump shafts, 2. the second bend pipe, 21. the 4th flange plate, 22. boss, 23. through holes, 24. exterior edge faces, 25. plexiglass sheets, 26. rubber pads, 3. runner envelope, 31. first flange plate, 32. second flange plate, 33. diffusers, 34. impellers, 4. camera.
Embodiment
As depicted in figs. 1 and 2, a kind of inlet means for axial-flow pump impeller import cross section PIV flow field survey of the present utility model comprises the first bend pipe 1, the second bend pipe 2 and runner envelope 3, the two ends of runner envelope 3 are distributed with the first flange plate 31 and the second flange plate 32, wherein the first flange plate 31 is connected with three-flange dish 11 thread seals of the first bend pipe 1 end, the second flange plate 32 is connected with the 4th flange plate 21 thread seals of the second bend pipe 2 ends, pump shaft 12 is through the first bend pipe 1 and runner envelope 3, diffuser 33 in runner envelope 3 and impeller 34 are fixed on pump shaft 12 successively, the first bend pipe 1 and runner envelope 3 at the end face center of joint on the axis of runner envelope 3, the second bend pipe 2 and runner envelope 3 at the end face center of joint also on the axis of runner envelope 3, the bending section outer tube wall of the second bend pipe 2 is provided with boss 22, on boss 22, have through hole 23, through hole 23 connects with the inner chamber of the second bend pipe 2 and runner envelope 3 respectively, on the exterior edge face 24 of boss 22, plexiglass sheet 25 is installed, in order to guarantee the sealing of bend pipe 2, can a rubber pad 26 be set at plexiglass sheet 25 and 24 of boss exterior edge faces, plexiglass sheet 25 and rubber pad 26 are bolted to connection on the exterior edge face 24 of boss 22.In addition,, when boss 22 is positioned at the second bend pipe 2 since on the crooked outer tube wall of the bending section 1/6 ~ 1/4 of the 4th flange plate 21 1 sides time, the using effect of inlet means of the present utility model is better.
Fig. 3 is that inlet means of the present utility model is used phase diagram, during use, in plexiglass sheet 25 outsides, place a camera 4, the sheet laser that thickness is about 1mm incides internal fluid from runner envelope 3, camera 4 is aimed at the region to be measured in runner envelope 3 with the direction of vertical plate light source, utilize the refraction action of trace particle to light, the image of particle while recording twice pulse laser exposure, form two width PIV egative films, what on egative film, record is the particle picture in whole region to be measured, by the poster processing soft according to cross correlation algorithm, can obtain each particle in this displacement of the utmost point in the short time, thereby calculate the speed of this particle, finally obtain whole velocity field.
Claims (3)
1. the inlet means for axial-flow pump impeller import cross section PIV flow field survey, comprise the first bend pipe (1), the second bend pipe (2) and runner envelope (3), the two ends of described runner envelope (3) are tightly connected with described the first bend pipe (1) and described the second bend pipe (2) respectively, pump shaft (12) is through described the first bend pipe (1) and described runner envelope (3), diffuser (33) and impeller (34) in described runner envelope (3) are fixed on described pump shaft (12) successively, it is characterized in that: described the first bend pipe (1) is centered close on the axis of described runner envelope (3) with the end face of described runner envelope (3) in joint, described the second bend pipe (2) is centered close on the axis of described runner envelope (3) with the end face of described runner envelope (3) in joint, the bending section outer tube wall of described the second bend pipe (2) is provided with boss (22), on described boss (22), have through hole (23), described through hole (23) connects with the inner chamber of described the second bend pipe (2) and described runner envelope (3) respectively, on the exterior edge face (24) of described boss (22), plexiglass sheet (25) is installed.
2. a kind of inlet means for axial-flow pump impeller import cross section PIV flow field survey according to claim 1, it is characterized in that: between described plexiglass sheet (25) and described boss exterior edge face (24), be provided with rubber pad (26), described plexiglass sheet (25) and described rubber pad (26) are bolted to connection on the exterior edge face (24) at described boss.
3. a kind of inlet means for axial-flow pump impeller import cross section PIV flow field survey according to claim 1, it is characterized in that: the two ends of described runner envelope (3) are distributed with the first flange plate (31) and the second flange plate (32), described the first flange plate (31) is threaded with the three-flange dish (11) of described the first bend pipe (1) end, and described the second flange plate (32) is threaded with the 4th flange plate (21) of described the second bend pipe (2) end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320166129.0U CN203532332U (en) | 2013-04-07 | 2013-04-07 | Inlet device for cross-section PIV flow field measurement of impeller inlet of axial flow pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320166129.0U CN203532332U (en) | 2013-04-07 | 2013-04-07 | Inlet device for cross-section PIV flow field measurement of impeller inlet of axial flow pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203532332U true CN203532332U (en) | 2014-04-09 |
Family
ID=50418545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320166129.0U Withdrawn - After Issue CN203532332U (en) | 2013-04-07 | 2013-04-07 | Inlet device for cross-section PIV flow field measurement of impeller inlet of axial flow pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203532332U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195758A (en) * | 2013-04-07 | 2013-07-10 | 江苏大学 | Inlet device for measuring axial flow pump impeller inlet cross section particle image velocimetry (PIV) flow field |
| CN105090061A (en) * | 2015-09-10 | 2015-11-25 | 江苏大学 | Particle image velocity (PIV) measuring device and method for flow field of mixed-flow pump impeller outlet |
-
2013
- 2013-04-07 CN CN201320166129.0U patent/CN203532332U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195758A (en) * | 2013-04-07 | 2013-07-10 | 江苏大学 | Inlet device for measuring axial flow pump impeller inlet cross section particle image velocimetry (PIV) flow field |
| CN103195758B (en) * | 2013-04-07 | 2015-06-10 | 江苏大学 | Inlet device for measuring axial flow pump impeller inlet cross section particle image velocimetry (PIV) flow field |
| CN105090061A (en) * | 2015-09-10 | 2015-11-25 | 江苏大学 | Particle image velocity (PIV) measuring device and method for flow field of mixed-flow pump impeller outlet |
| CN105090061B (en) * | 2015-09-10 | 2017-03-01 | 江苏大学 | A kind of PIV measurement apparatus of mixed-flow pump impeller exit flow field and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103047124B (en) | Multifunction test device is measured in centrifugal pump external characteristics and internal flow | |
| Goyal et al. | PIV measurements in Francis turbine–a review and application to transient operations | |
| CN108953171B (en) | A kind of the 3D-PIV measuring device and method of mixed-flow pump blade rim gap flow field | |
| CN102619761B (en) | Axial-flow pump for particle image velocimetry and particle image velocimetry method | |
| CN108801584B (en) | Wave flow velocity measurement system based on laser Doppler velocity measurement, water tunnel type swimming machine system and velocity correction method | |
| CN103680266A (en) | Small-size hydromechanics experimental apparatus | |
| CN103195758B (en) | Inlet device for measuring axial flow pump impeller inlet cross section particle image velocimetry (PIV) flow field | |
| CN102798511A (en) | Test unit for refining test of flow field in hydraulic machine | |
| Song et al. | Experimental study of the floor-attached vortices in pump sump using V3V | |
| CN203532332U (en) | Inlet device for cross-section PIV flow field measurement of impeller inlet of axial flow pump | |
| Wangxu et al. | Particle image velocimetry flowmeter for natural gas applications | |
| CN102425550A (en) | Centrifugal pump for visual internal flow field test | |
| Yang et al. | Influence of rotation speed on flow field and hydraulic noise in the conduit of a vertical axial-flow pump under low flow rate condition | |
| Iliescu et al. | 3D PIV and LDV measurements at the outlet of a Francis turbine draft tube | |
| CN203051160U (en) | Fused salt model pump external characteristic and inner flow measurement testing device | |
| CN103185040B (en) | For the inlet tube of axial-flow pump impeller import cross section PIV flow-field test | |
| Sankovic et al. | PIV investigations of the flow field in the volute of a rotary blood pump | |
| Feng et al. | Qualitative comparison between numerical and experimental results of unsteady flow in a radial diffuser pump | |
| Yang et al. | Flow measurements in a model centrifugal pump by 3-D PIV | |
| CN205136054U (en) | PIV measuring device of mixed flow pump impeller exit flow field | |
| CN203906319U (en) | Visualization experiment device for unsteady flow in centrifugal pump | |
| Iliescu et al. | Two phase PIV measurements at the runner outlet in a Francis turbine | |
| CN203248405U (en) | Inlet pipe used for axial flow pump impeller inlet cross section PIV flow field test | |
| CN204142299U (en) | A kind of temperature and pressure compensation integral type differential pressure flowmeter | |
| Deng et al. | Experimental and Computational Fluid Dynamics Study of the Flow Field of a Model Pump Turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140409 Effective date of abandoning: 20150610 |
|
| RGAV | Abandon patent right to avoid regrant |