CN219865593U - Horn type pump suction inlet with increased flow guide partition plate and pre-rotation liquid inlet - Google Patents
Horn type pump suction inlet with increased flow guide partition plate and pre-rotation liquid inlet Download PDFInfo
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- CN219865593U CN219865593U CN202320284011.1U CN202320284011U CN219865593U CN 219865593 U CN219865593 U CN 219865593U CN 202320284011 U CN202320284011 U CN 202320284011U CN 219865593 U CN219865593 U CN 219865593U
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- flow
- water inlet
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- 238000005192 partition Methods 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 230000000087 stabilizing effect Effects 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model relates to a horn type pump suction inlet with a diversion baffle plate added and a liquid inlet pre-rotated, which comprises the following components: the device comprises a water inlet horn and a flow guide baffle plate, wherein the flow guide baffle plate comprises a plurality of blocks and is uniformly arranged in the water inlet horn; the change rule of the cross section of the flow guide partition board is in accordance with the cross section of the Archimedes spiral line, and the height of the flow guide partition board extends from the inlet of the water inlet horn to the outlet. The utility model can guide the incoming flow to flow in the spiral direction designed by the spiral guide baffle plate, change the axial surface and tangential surface speed direction of the water flow, and make the incoming flow more in line with the incoming flow condition of the impeller inlet, thereby reducing the inflow vortex, reducing the pre-rotation of the impeller inlet and improving the cavitation resistance of the water pump. The flow stabilizing device has the advantages of being capable of achieving a flow stabilizing effect on fluid at the outlet of the impeller, improving outlet vortex, reducing hydraulic loss and further improving working efficiency of the water pump.
Description
Technical Field
The utility model relates to a horn-shaped pump inlet, in particular to a horn-shaped pump inlet which is formed by adding a flow guide baffle plate into the horn-shaped pump inlet, reduces inflow vortex, reduces pre-rotation of an impeller inlet, improves cavitation resistance of a water pump, and reduces pre-rotation of a liquid inlet.
Background
The water inlet loudspeaker is used for leading the water in the water absorbing tank to the inlet of the pump smoothly, and the water flow has axial partial velocity and tangential partial velocity when entering the inlet of the impeller, so that turbulence is easily formed at the inlet, namely, the inlet of the impeller is pre-rotated. The inlet impact loss, vibration and the like caused by the impact change the operation characteristics of the water pump, so that the water pump does not work in a high-efficiency area, and the cavitation performance of the water pump is damaged when the water pump is more serious. Therefore, improving inlet pre-rotation is of great importance to improve the safety and durability of the whole pump.
Disclosure of Invention
In view of the above problems, a main object of the present utility model is to provide a baffle plate added to a trumpet-shaped pump inlet, which reduces inflow vortex, reduces pre-rotation of an impeller inlet, and increases cavitation resistance of a water pump.
The utility model solves the technical problems by the following technical proposal: a trumpet-shaped pump intake with an increased baffle for lowering the inlet, the trumpet-shaped pump intake with an increased baffle for lowering the inlet comprising:
the device comprises a water inlet horn and a flow guide baffle plate, wherein the flow guide baffle plate comprises a plurality of blocks and is uniformly arranged in the water inlet horn;
the change rule of the cross section of the flow guide partition board is in accordance with the cross section of the Archimedes spiral line, and the height of the flow guide partition board extends from the inlet of the water inlet horn to the outlet.
In a specific embodiment of the present utility model, the baffle includes three pieces.
In the specific embodiment of the utility model, the width of the flow guide baffle is 1/3-1/2 of the diameter of the outlet of the water inlet horn.
In the specific implementation example of the utility model, the thickness of the flow guide partition plate is 1/3-1/2 of the wall thickness of the water inlet horn.
In a specific embodiment of the utility model, the baffle and the water inlet horn are cast as one piece.
In the concrete implementation example of the utility model, the diameter of the water inlet horn is 1.5-1.7 times of that of the water outlet.
A design method of a horn-type pump suction port comprises the following steps: the method comprises the following steps:
the first step: the change rule of the cross section of the flow guide partition board adopts an Archimedes spiral line, and the flow guide partition board is drawn according to the following relational expression: r=aθ
Wherein:
r-pole radius (pole radius in meters);
a-the coefficient of helicity,D L for inlet diameter of water inlet horn>The wrap angle is given in degrees;
θ -helix angle in degrees;
and a second step of: projecting the Archimedes spiral line onto the inner side curved surface of the water inlet horn body; stretching the water inlet horn in the direction of the rotation center line by taking the projection curve as the center line, wherein the stretching length is the diameter D of the outlet of the water inlet horn 0 1/3-1/2 of the thickness of the water inlet horn is 1/3-1/2 of the thickness t of the whole flow guide baffle plate, wherein the two sides of the stretching curved surface are symmetrically thickened at equal intervals;
and a third step of: all edges and corners of the guide baffle are rounded to form R50, three guide baffle plates are uniformly distributed, and the guide baffle plates and the water inlet horn body form an integral casting piece.
The utility model has the positive progress effects that: according to the horn-shaped pump inlet with the increased flow guide partition plate for lowering the prerotation of the liquid inlet, the incoming flow can be guided to flow according to the spiral direction designed by the spiral flow guide partition plate, and the axial surface and the tangential surface speed direction of the water flow are changed, so that the incoming flow condition of the impeller inlet is more met, the inflow vortex is reduced, the prerotation of the impeller inlet is lowered, and the cavitation resistance of the water pump is improved. The flow stabilizing device has the advantages of being capable of achieving a flow stabilizing effect on fluid at the outlet of the impeller, improving outlet vortex, reducing hydraulic loss and further improving working efficiency of the water pump.
Drawings
Fig. 1 is a schematic cross-sectional view of a conventional water inlet speaker.
Fig. 2-1 is a perspective view of a water inlet horn according to the present utility model.
Fig. 2-2 is a second perspective view of the water inlet speaker according to the present utility model.
Fig. 2-3 are schematic cross-sectional views of the water inlet horns provided by the utility model.
FIG. 3-1 is a schematic view of a baffle plate according to the present utility model.
Fig. 3-2 is a second schematic structural view of the baffle plate of the present utility model.
Fig. 3-3 are three schematic structural views of the baffle plate of the present utility model.
Fig. 3-4 are schematic views of the structure of the baffle plate of the present utility model.
Fig. 4-1 is a schematic diagram of a change rule of a cross section of a baffle plate in the present utility model.
FIG. 4-2 shows the wrap angle phi and the specific rotation number n in the present utility model s Is a relationship of (3).
FIG. 5 is a model number 1 impeller inlet velocity vector diagram of the present utility model.
FIG. 6 is a model No. 2 impeller inlet velocity vector diagram of the present utility model.
Fig. 7 is a model number 1 impeller exit velocity vector diagram in the present utility model.
Fig. 8 is a model number 2 impeller exit velocity vector diagram in the present utility model.
Fig. 9 is a schematic diagram of the overall structure of the present utility model.
The following are names corresponding to the reference numerals in the present utility model:
in the figure: the water inlet loudspeaker 1, the flow guide baffle 2, the Archimedes spiral line A and the left view center line B of the flow guide baffle.
Detailed Description
The following description of the preferred embodiments of the present utility model is given with reference to the accompanying drawings, so as to explain the technical scheme of the present utility model in detail.
Fig. 1 is a schematic cross-sectional view of a conventional water inlet speaker. Fig. 2-1 is a perspective view of a first water inlet speaker provided by the present utility model, fig. 2-2 is a perspective view of a second water inlet speaker provided by the present utility model, fig. 2-3 is a schematic cross-sectional view of the water inlet speaker provided by the present utility model, and fig. 9 is a schematic overall structure of the water inlet speaker of the present utility model. Reference is made to the figures described above: compared with a common water inlet horn, the utility model comprises the guide baffle plate 2, wherein the guide baffle plate 2 comprises a plurality of blocks which are uniformly arranged in the water inlet horn 1; the change rule of the cross section of the flow guide partition plate 2 is the cross section conforming to an Archimedes spiral (Archimedes spiral at A in figures 3-3 and 4-1), and the height of the flow guide partition plate 2 extends from the inlet to the outlet of the water inlet horn.
The left view center line B (figures 3-2 and 3-4) of the flow guide baffle is the projection curve of the Archimedes spiral line on the inner side curved surface of the water inlet loudspeaker.
In the illustration given by the present utility model, the baffle of the present utility model comprises three pieces; and the following parameters may be employed: the width of the flow guide baffle is 1/3-1/2 of the inlet diameter of the smaller end of the water inlet horn, the thickness of the flow guide baffle is 1/3-1/2 of the wall thickness of the water inlet horn, and the diameter of the water inlet opening of the water inlet horn is 1.5-1.7 times of the water outlet. In a specific implementation, the above parameters may be adjusted as desired.
The flow guide baffle plate and the water inlet horn are integrated into a casting piece.
The horn-shaped pump suction inlet can adopt the following design method: the method comprises the following steps:
the first step: the change rule of the cross section of the flow guide partition board adopts an Archimedes spiral line (figure 4-1), and the flow guide partition board is drawn according to the following relation: r=aθ
Wherein:
r-pole radius in meters;
a-the coefficient of helicity,D L the inlet diameter of the water inlet horn is (the unit of the inlet diameter of the water inlet horn is meter); />Is the wrap angle, the unit of the wrap angle is DEG, and the unit is n according to the specific rotation number of the pump s Selected as per fig. 4-2;
θ -helix angle, the unit of helix angle is °.
And a second step of: projecting the Archimedes spiral line onto the inner side curved surface of the water inlet horn body; stretching the water inlet horn in the direction of the rotation center line by taking the projection curve as the center line, wherein the stretching length is the diameter D of the outlet of the water inlet horn 0 1/3-1/2 of the thickness of the water inlet horn is 1/3-1/2 of the thickness t of the whole flow guide baffle plate, wherein the two sides of the stretching curved surface are symmetrically thickened at equal intervals.
And a third step of: all edges and corners of the guide baffle are rounded to form R50, three guide baffle plates are uniformly distributed, and the guide baffle plates and the water inlet horn body form an integral casting piece.
The spiral guide baffle plate can guide the incoming flow to flow according to the designed spiral direction, and change the axial surface and tangential surface speed direction of the water flow, so that the incoming flow condition of the impeller inlet is more met, the incoming flow vortex can be reduced, the pre-rotation of the impeller inlet is reduced, the cavitation resistance of the water pump can be improved, the outlet vortex is improved, and the working efficiency of the water pump is further improved.
The following is a specific implementation example:
taking the specific rotation speed n s The test pump=405 performs numerical simulation and flow field comparison on different water inlet horns matched with the same impeller pump body, and the parameters are as follows: design flow q=4300 m 3 and/H, the lift H=14m, and the rotating speed n=735 r/min. The model 1 adopts the existing water inlet loudspeaker, the model 2 adopts a new design structure, the two models both use Fluent 18.1 software to carry out flow field analysis, the RNG k-epsilon turbulence model and the continuity equation are adopted, the total mesh number is about 630 ten thousand, the inlet of the calculation domain is given flow velocity, the outlet adopts pressure outlet, and the calculation convergence accuracy is10- 4 . The CFD simulated flow field is shown in fig. 5-8.
Fig. 5 is a model impeller inlet speed vector diagram of No. 1 in the present utility model, fig. 6 is a model impeller inlet speed vector diagram of No. 2 in the present utility model, fig. 7 is a model impeller outlet speed vector diagram of No. 1 in the present utility model, and fig. 8 is a model impeller outlet speed vector diagram of No. 2 in the present utility model. As can be seen from the flow field vector comparison diagram, the model No. 2 has the advantages that the spiral flow guide baffle is designed on the water inlet loudspeaker, the flow velocity of water at the inlet of the impeller is obviously lower than that of the model No. 1, the higher the flow velocity is, the faster the local pressure is reduced, and cavitation is more likely to occur, so that the cavitation resistance of the model No. 2 is obviously improved compared with that of the model No. 1. And the back cover plate of the No. 1 model blade is close to a plurality of places of the outlet, and the flow field of the No. 2 model is uniform and smooth, so that the novel water inlet loudspeaker plays a key role in stabilizing the flow of the impeller outlet.
The novel design of the water inlet loudspeaker of the utility model enhances the structural strength, reduces the prerotation of the pump inlet, improves the cavitation resistance of the water pump, and improves the safety and durability of the whole pump.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the utility model, and that various changes and modifications may be effected therein without departing from the spirit and scope of the utility model as defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an increase water conservancy diversion baffle reduces horn-like pump inlet of liquid inlet prerotation which characterized in that: the horn-shaped pump suction inlet with the increased flow guide partition plate and the pre-rotation liquid inlet is reduced comprises:
the device comprises a water inlet horn and a flow guide baffle plate, wherein the flow guide baffle plate comprises a plurality of blocks and is uniformly arranged in the water inlet horn;
the change rule of the cross section of the flow guide partition board is in accordance with the cross section of the Archimedes spiral line, and the height of the flow guide partition board extends from the inlet of the water inlet horn to the outlet.
2. The trumpet pump intake with the baffle added to reduce liquid inlet pre-rotation of claim 1, wherein: the flow guide partition plate comprises three blocks.
3. The trumpet pump intake with the baffle added to reduce liquid inlet pre-rotation of claim 1, wherein: the width of the flow guide baffle is 1/3-1/2 of the diameter of the outlet of the water inlet horn.
4. The trumpet pump intake with the baffle added to reduce liquid inlet pre-rotation of claim 1, wherein: the thickness of the flow guide baffle is 1/3-1/2 of the wall thickness of the water inlet horn.
5. The trumpet pump intake with the baffle added to reduce liquid inlet pre-rotation of claim 1, wherein: the guide baffle and the water inlet horn are cast into a whole.
6. The trumpet pump intake with the baffle added to reduce liquid inlet pre-rotation of claim 1, wherein: the diameter of the water inlet horn is 1.5-1.7 times of that of the water outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320284011.1U CN219865593U (en) | 2023-02-22 | 2023-02-22 | Horn type pump suction inlet with increased flow guide partition plate and pre-rotation liquid inlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320284011.1U CN219865593U (en) | 2023-02-22 | 2023-02-22 | Horn type pump suction inlet with increased flow guide partition plate and pre-rotation liquid inlet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219865593U true CN219865593U (en) | 2023-10-20 |
Family
ID=88337720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320284011.1U Active CN219865593U (en) | 2023-02-22 | 2023-02-22 | Horn type pump suction inlet with increased flow guide partition plate and pre-rotation liquid inlet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219865593U (en) |
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2023
- 2023-02-22 CN CN202320284011.1U patent/CN219865593U/en active Active
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