CN211116664U - Vertical multistage pump space guide vane body - Google Patents
Vertical multistage pump space guide vane body Download PDFInfo
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- CN211116664U CN211116664U CN201921319718.1U CN201921319718U CN211116664U CN 211116664 U CN211116664 U CN 211116664U CN 201921319718 U CN201921319718 U CN 201921319718U CN 211116664 U CN211116664 U CN 211116664U
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- guide vane
- impeller
- blade
- inlet
- multistage pump
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Abstract
The utility model discloses a vertical multistage pump space guide vane body, which comprises an outer shell and an inner shell; is characterized in that the right end of the outer shell is provided with a connecting flange, the middle position of the inner shell is provided with a guide vane wheel hub, and a guide vane blade is arranged between the outer shell and the inner shell; the tail end of the guide vane blade is provided with an extension section along the axial direction; a secondary impeller is arranged on the right side of the guide impeller hub and is matched and connected with the outer shell, and an impeller inlet is formed in the left end of the secondary impeller; the secondary impeller is provided with a plurality of impeller blades, a space is arranged between an inlet of the impeller blade and an inlet of the impeller blade, and an outlet of the impeller blade is flush with the right end of the secondary impeller. The impeller has the advantages of being simple in structure, eliminating the speed and rotation component of fluid at the inlet of the secondary impeller more thoroughly, reducing the turbulence intensity of the fluid, improving the flow state of the inlet of the impeller, reducing the hydraulic loss of the transition region of the guide vane of the impeller, obviously increasing the lift of the next-stage impeller and improving the running stability of the pump.
Description
Technical Field
The utility model relates to a field of pump especially relates to a vertical multistage pump space guide vane body.
Background
The space guide vane body is widely applied to a long-shaft submersible pump, a submerged pump and a guide vane type mixed flow pump, and has the functions of collecting and converting fluid of a first-stage impeller into pressure energy and conveying the pressure energy to a next-stage impeller, changing radial flow into axial flow and eliminating circumferential speed components. However, according to all the data at present, the flow cannot completely follow the trend of the outlet streamline of the guide vane under the condition of limited number of blades, and the circumferential component of the speed is necessarily existed. In the basic formula of the pump, if the impeller inlet speed has a rotation component, the impeller head H of the next stage is significantly reduced, and the performance of the whole pump is greatly lost.
The space guide vane body and the impeller are in a dynamic and static matching relationship, and the flow structure of the transition area is complex, so that flow separation is easy to occur. The hydraulic loss in the space guide vane body of the vertical multistage pump accounts for about 40% -50% of the hydraulic loss in the pump, and is the flow passage component with the largest flow loss in the pump. The space guide vane body in the prior art has the problems that the speed rotation component of fluid at the inlet of the secondary impeller cannot be eliminated, the hydraulic loss of the transition region of the guide vane of the impeller is large, and the like.
Disclosure of Invention
The utility model aims at providing a vertical multistage pump space guide vane body, compact structure, stability is good, excellent in use effect has solved above technical problem.
In order to realize the technical purpose, reach foretell technical requirement, the utility model discloses the technical scheme who adopts is: a vertical multistage pump space guide vane body comprises an outer shell and an inner shell; the method is characterized in that: a connecting flange is arranged at the right end of the outer shell, a guide vane wheel hub is arranged at the middle position of the inner shell, a guide vane blade is arranged between the outer shell and the inner shell, and the guide vane blade is an arc-shaped curved surface; the tail end of the guide vane blade is provided with an extension section along the axial direction; a secondary impeller is arranged on the right side of the guide impeller hub and is matched and connected with the outer shell, and an impeller inlet is formed in the left end of the secondary impeller; the secondary impeller is provided with a plurality of impeller blades, a space is arranged between an inlet of the impeller blade and an inlet of the impeller blade, and an outlet of the impeller blade is flush with the right end of the secondary impeller.
Preferably: the guide vane blade end extension section comprises a guide vane blade length extension section and a guide vane blade short extension section, the end of the guide vane blade length extension section is arranged between an impeller inlet and an impeller blade inlet, and the end of the guide vane blade short extension section is flush with the impeller inlet.
Preferably: the outlet sides of the long extending section and the short extending section of the guide vane are parallel to the right end face of the guide vane wheel hub.
Preferably: the guide vane blade long extension section and the guide vane blade short extension section are distributed at intervals.
Preferably: and a gap is arranged between the tail end of the long extension section of the guide vane blade and the secondary impeller.
Preferably: the guide vane blades are bent along the same direction.
Preferably: the number of the guide vane blades is set to be even number pieces.
Preferably: and a reinforcing rib plate is arranged between the outer shell and the connecting flange.
The utility model has the advantages that; the utility model provides a vertical multistage pump space guide vane body, compares with traditional structure: a connecting flange is arranged at the right end of the outer shell, so that the precise assembly of the space guide vane body of the multistage vertical multistage pump is ensured; the tail end of the guide vane long extension section is arranged between the inlet of the impeller and the inlet of the impeller, and the tail end of the guide vane short extension section is flush with the inlet of the impeller; the inlet inflow displacement deterioration of the secondary impeller is effectively avoided; the long extension section and the short extension section of the guide vane blade are distributed at intervals to ensure the symmetrical inflow of the secondary impeller; a gap is formed between the tail end of the long extension section of the guide vane blade and the secondary impeller, so that the structural damage caused by the friction or locking between the tail edge of the long extension section of the guide vane blade extending into the impeller and the rotating impeller is effectively avoided; the utility model discloses simple structure through the exit position of extension stator blade, eliminates secondary impeller entry fluidic speed rotation component more thoroughly, reduces fluidic torrent intensity, improves impeller import flow state, reduces impeller stator transition region's hydraulic loss to showing the lift that has increased next stage impeller, having improved pump operation stationarity.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of a guide vane hub and a guide vane blade of the present invention;
in the figure: 1. an outer housing; 2. an inner housing; 3. a connecting flange; 4. a vane wheel hub; 5. a guide vane blade; 5-1, a guide vane blade length extension section; 5-2, short extension section of guide vane blade; 6. a secondary impeller; 7. an impeller inlet; 8. an impeller blade; 9. an impeller blade inlet; 10. an impeller blade outlet; 11. and (5) reinforcing ribs.
Detailed Description
In order to make the object, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments;
in the drawings: a vertical multistage pump space guide vane body comprises an outer shell 1 and an inner shell 2; the method is characterized in that: a connecting flange 3 is arranged at the right end of the outer shell 1, a guide vane wheel hub 4 is arranged at the middle position of the inner shell 2, a guide vane blade 5 is arranged between the outer shell 1 and the inner shell 2, and the guide vane blade 5 is arranged into an arc-shaped curved surface; the tail end of the guide vane blade 5 is provided with an extension section along the axial direction; a secondary impeller 6 is arranged on the right side of the guide impeller hub 4, the secondary impeller 6 is matched and connected with the outer shell 1, and an impeller inlet 7 is formed in the left end of the secondary impeller 6; the secondary impeller 6 is provided with a plurality of impeller blades 8, a space is arranged between an impeller blade inlet 9 and an impeller inlet 7, and an impeller blade outlet 10 is flush with the right end of the secondary impeller 6.
The extending section of the tail end of the guide vane blade 5 comprises a guide vane blade long extending section 5-1 and a guide vane blade short extending section 5-2, the tail end of the guide vane blade long extending section 5-1 is arranged between an impeller inlet 7 and an impeller blade inlet 9, and the tail end of the guide vane blade short extending section 5-2 is flush with the impeller inlet 7. The outlet sides of the guide vane long extension section 5-1 and the guide vane short extension section 5-2 are parallel to the right end face of the guide vane wheel hub 4; the guide vane long extension sections 5-1 and the guide vane short extension sections 5-2 are distributed at intervals; a gap is arranged between the tail end of the long extension section 5-1 of the guide vane blade and the secondary impeller 6; the guide vane blades 5 are bent along the same direction; the number of the guide vane blades 5 is set as even number pieces; and a reinforcing rib plate 11 is arranged between the outer shell 1 and the connecting flange 3.
The utility model discloses a concrete implementation: combine fig. 1, 2, vertical multistage pump space guide vane body include shell body, interior casing, wheel hub, flange and stator blade. The guide vane blade is designed by adopting a traditional theoretical method or computer aided Design software such as CFturbo, Turbo Design and the like. The number of the extended long blades is consistent with that of the extended short blades, and the extended long blades and the extended short blades are distributed at intervals, namely are symmetrical around the axis. The long blades extend to the middle position of the inlet of the secondary impeller and the inlet of the blades of the secondary impeller, the radial size of the part extending into the impeller is reduced by 10 percent, and arc transition treatment is carried out; the short blades extend to the inlet of the secondary impeller; the utility model can be used for submerged pumps such as deep well submersible pumps, molten salt pumps and the like, has good structural reliability, and adopts corrosion-resistant stainless steel as the material; the forming mode can be integral casting or formed by partial stamping and welding.
A connecting flange is arranged at the right end of the outer shell, so that the precise assembly of the space guide vane body of the multistage vertical multistage pump is ensured; the tail end of the guide vane long extension section is arranged between the inlet of the impeller and the inlet of the impeller, and the tail end of the guide vane short extension section is flush with the inlet of the impeller; the inlet inflow displacement deterioration of the secondary impeller is effectively avoided; the long extension section and the short extension section of the guide vane blade are distributed at intervals to ensure the symmetrical inflow of the secondary impeller; a gap is formed between the tail end of the long extension section of the guide vane blade and the secondary impeller, so that the structural damage caused by the friction or locking between the tail edge of the long extension section of the guide vane blade extending into the impeller and the rotating impeller is effectively avoided; the utility model discloses simple structure through the exit position of extension stator blade, eliminates secondary impeller entry fluidic speed rotation component more thoroughly, reduces fluidic torrent intensity, improves impeller import flow state, reduces impeller stator transition region's hydraulic loss to showing the lift that has increased next stage impeller, having improved pump operation stationarity.
The foregoing examples are given for the purpose of illustrating the present invention in a clear and non-restrictive manner, and it will be apparent to those skilled in the art that variations and modifications of the present invention may be made in other variations and modifications based on the foregoing description, and it is not necessary or necessary to exhaustively enumerate all embodiments, and all such variations and modifications as are obvious and desirable in the art are within the scope of the present invention.
Claims (8)
1. A vertical multistage pump space guide vane body comprises an outer shell (1) and an inner shell (2); the method is characterized in that: a connecting flange (3) is arranged at the right end of the outer shell (1), a guide vane wheel hub (4) is arranged at the middle position of the inner shell (2), a guide vane blade (5) is arranged between the outer shell (1) and the inner shell (2), and the guide vane blade (5) is arranged into an arc-shaped curved surface; the tail end of the guide vane blade (5) is provided with an extension section along the axial direction; a secondary impeller (6) is arranged on the right side of the impeller hub (4), the secondary impeller (6) is matched and connected with the outer shell (1), and an impeller inlet (7) is formed in the left end of the secondary impeller (6); the secondary impeller (6) is provided with a plurality of impeller blades (8), a space is arranged between an impeller blade inlet (9) and an impeller inlet (7), and an impeller blade outlet (10) is flush with the right end of the secondary impeller (6).
2. The vertical multistage pump space guide vane body according to claim 1, characterized in that: the extending section of the tail end of the guide vane blade (5) comprises a guide vane blade long extending section (5-1) and a guide vane blade short extending section (5-2), the tail end of the guide vane blade long extending section (5-1) is arranged between an impeller inlet (7) and an impeller blade inlet (9), and the tail end of the guide vane blade short extending section (5-2) is flush with the impeller inlet (7).
3. The vertical multistage pump space guide vane body according to claim 2, characterized in that: the outlet edges of the long extending sections (5-1) and the short extending sections (5-2) of the guide vane blades are parallel to the right end face of the guide vane wheel hub (4).
4. The vertical multistage pump space guide vane body according to claim 2, characterized in that: the guide vane blade long extension sections (5-1) and the guide vane blade short extension sections (5-2) are distributed at intervals.
5. The vertical multistage pump space guide vane body according to claim 2, characterized in that: a gap is arranged between the tail end of the long extension section (5-1) of the guide vane blade and the secondary impeller (6).
6. The vertical multistage pump space guide vane body according to claim 1, characterized in that: the guide vane blades (5) are bent along the same direction.
7. The vertical multistage pump space guide vane body according to claim 1, characterized in that: the number of the guide vane blades (5) is set to be even number.
8. The vertical multistage pump space guide vane body according to claim 1, characterized in that: and a reinforcing rib plate (11) is arranged between the outer shell (1) and the connecting flange (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921319718.1U CN211116664U (en) | 2019-08-15 | 2019-08-15 | Vertical multistage pump space guide vane body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921319718.1U CN211116664U (en) | 2019-08-15 | 2019-08-15 | Vertical multistage pump space guide vane body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211116664U true CN211116664U (en) | 2020-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921319718.1U Active CN211116664U (en) | 2019-08-15 | 2019-08-15 | Vertical multistage pump space guide vane body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211116664U (en) |
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2019
- 2019-08-15 CN CN201921319718.1U patent/CN211116664U/en active Active
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