CN115492791A - Turbine rotor structure for centrifugal pump - Google Patents
Turbine rotor structure for centrifugal pump Download PDFInfo
- Publication number
- CN115492791A CN115492791A CN202211353864.2A CN202211353864A CN115492791A CN 115492791 A CN115492791 A CN 115492791A CN 202211353864 A CN202211353864 A CN 202211353864A CN 115492791 A CN115492791 A CN 115492791A
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- CN
- China
- Prior art keywords
- turbine rotor
- centrifugal pump
- edge
- connecting portion
- rotor structure
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2238—Special flow patterns
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2272—Rotors specially for centrifugal pumps with special measures for influencing flow or boundary layer
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/24—Vanes
- F04D29/242—Geometry, shape
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a turbine rotor structure for a centrifugal pump, which comprises a front disc (1), a rear disc (2) and blades (3), wherein the blades are uniformly distributed along the circumferential direction and connected between the front disc and the rear disc, the front disc is provided with a water inlet, the blades are provided with a front edge (31), a rear edge (32) and a top edge (33), the top edge is connected with the inner side surface of the front disc, and the front edge is positioned at the upstream of the rear edge, and the turbine rotor structure is characterized in that: the medial surface of preceding dish has step portion (4), and the medial surface of preceding dish is connecting portion (P) with the junction of apical margin, and the length dimension of connecting portion is far less than the length or the connecting portion of apical margin for the tie point, and step portion is located the radial outer end of connecting portion, constitutes space (S) that converges between the medial surface of preceding dish and the apical margin, and the space that converges is located the radial inner of connecting portion. The invention can effectively improve the anti-cavitation performance of the centrifugal pump, and reduce the flow loss of the centrifugal pump, thereby improving the overall performance of the centrifugal pump.
Description
Technical Field
The invention relates to the technical field of turbomachinery, in particular to a turbine rotor structure for a centrifugal pump.
Background
The turbine rotor structure of the centrifugal pump comprises a front disc, a rear disc and a plurality of blades, wherein the blades are uniformly distributed along the circumferential direction and connected between the front disc and the rear disc, the front disc is provided with a water inlet, the blades are provided with a front edge, a rear edge and a top edge, the top edge is connected with the inner side surface of the front disc, and the front edge is positioned at the upstream of the rear edge. However, the existing turbine rotor has the problems that the cavitation resistance is required to be further improved and the flow loss is large.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a turbine rotor structure for a centrifugal pump, which is characterized in that through the design of a step part, the step part is positioned at the radial outer end of a connecting part P, a converging space S is formed between the inner side surface of a front disc and a top edge, the converging space S is positioned at the radial inner end of the connecting part P, and the step part comprises a plurality of steps, so that the turbine rotor (impeller) has a step-changed enlarged space at the outlet of the turbine rotor (impeller), the cavitation resistance of the centrifugal pump can be effectively improved, the flow loss of the centrifugal pump is reduced, and the overall performance of the centrifugal pump is improved. The design of the confluence space S and the bulge part can improve the flow guiding performance at the inlet of the blade, thereby reducing the flow loss of the centrifugal pump.
In order to achieve the purpose, the invention adopts the technical scheme that:
a turbine rotor structure for centrifugal pump, it includes foreplate (1), after-disk (2), blade (3), a plurality of blades along circumference evenly distributed and connect between foreplate and after-disk, the foreplate has the water inlet, the blade has leading edge (31), trailing edge (32), top edge (33), the top edge is connected with the medial surface of foreplate, the leading edge is located the upstream of trailing edge, its characterized in that: the medial surface of preceding dish has step portion (4), and the medial surface of preceding dish is connecting portion (P) with the junction of apical margin, and the length size of connecting portion is far less than the length or the connecting portion of apical margin (33) for the tie point, and the step portion is located the radial outer end of connecting portion, constitutes between the medial surface of preceding dish and the apical margin space (S) that converges, and the space that converges is located the radial inner of connecting portion.
Further, the step part (4) comprises a plurality of steps (41), and the plurality of steps are 3-8 steps; the step part enables the thickness of the front disc (1) to gradually reduce from the connecting part (P) to the outlet radius R of the turbine rotor.
Further, the blade (3) is provided with a bulge (34) formed between the top edge (33) and the front edge (31), the bulge end point of the bulge is positioned at the starting end of the confluence space (S), and the confluence space is in a tapered structure along the water flow direction; the leading edge is arc protruding structure, and arc protruding structure extends to turbine rotor's axis direction.
Further, the trailing edge (32) is arranged inclined with respect to the axis of the turbine rotor, and the inclination angle a =5-15 °; the radius of the intersection of the trailing edge (32) with the top edge (33) is smaller than the radius of the intersection of the trailing edge with the rear disc.
Further, the turbine rotor has an exit radius R, the connection (P) has a radius R1, R1= (0.70-0.90) R.
Further, the projection (34) has a radius R2, R2= (0.50-0.70) R.
The invention relates to a turbine rotor structure for a centrifugal pump, which is characterized in that through the design of a step part, the step part is positioned at the radial outer end of a connecting part P, a confluence space S is formed between the inner side surface of a front disc and a top edge, the confluence space S is positioned at the radial inner end of the connecting part P, and the step part comprises a plurality of steps, so that a turbine rotor (impeller) has a step-changed enlarged space at the outlet of the turbine rotor, the cavitation resistance of the centrifugal pump can be effectively improved, the flow loss of the centrifugal pump is reduced, and the overall performance of the centrifugal pump is improved. The design of the confluence space S and the bulge part can improve the flow guiding performance at the inlet of the blade, thereby reducing the flow loss of the centrifugal pump.
Drawings
FIG. 1 is a schematic view of the turbine rotor structure for a centrifugal pump of the present invention;
fig. 2 is a schematic view of the turbine rotor structure for a centrifugal pump according to the present invention.
In the figure: front disk 1, rear disk 2, blade 3, step 4, leading edge 31, trailing edge 32, front disk side top edge 33, boss 34, step 41, connection/connection point P, and merging space S.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-2, a turbine rotor structure for a centrifugal pump includes a front disk 1, a rear disk 2, and a plurality of blades 3, the plurality of blades 3 are uniformly distributed along a circumferential direction and connected between the front disk 1 and the rear disk 2, the front disk 1 has a water inlet, the blades 3 have a front edge 31, a rear edge 32, and a top edge 33, the top edge 33 is connected with an inner side surface of the front disk 1, the front edge 31 is located upstream of the rear edge 32, and the turbine rotor structure is characterized in that: the medial surface of foreplate 1 has step portion 4, and the medial surface of foreplate 1 is connecting portion P with the junction of apical margin 33, and the length dimension of connecting portion P is far less than the length of apical margin 33 or connecting portion P is the tie point, and step portion 4 lies in the radial outer end of connecting portion P, constitutes the space S that converges between the medial surface of foreplate 1 and apical margin 33, and the space S that converges lies in the radial inner of connecting portion P.
Further, the step part 4 comprises a plurality of steps 41, and the plurality of steps 41 is 3 to 6 steps 41; the step 4 gradually reduces the thickness of the front disk 1 from the connection P to the turbine rotor (impeller) exit radius R.
The invention relates to a turbine rotor structure for a centrifugal pump, which is characterized in that through the design of a step part 4, the step part 4 is positioned at the radial outer end of a connecting part P, a converging space S is formed between the inner side surface of a front disc 1 and a top edge 33, the converging space S is positioned at the radial inner end of the connecting part P, and the step part 4 comprises a plurality of steps 41, so that the turbine rotor (impeller) has a step-changed enlarged space at the outlet of the turbine rotor, the cavitation resistance of the centrifugal pump can be effectively improved, the flow loss of the centrifugal pump is reduced, and the overall performance of the centrifugal pump is improved.
Further, the blade 3 has a convex portion 34, and the convex portion 34 is formed between the top edge 33 and the front edge 31, and a convex end of the convex portion 34 is located at a starting end of the converging space S, and the converging space S has a tapered structure in the water flow direction. The leading edge 31 is in the form of an arcuate nose structure which extends in the direction of the axis of the turbine rotor.
Further, the trailing edge 32 is arranged inclined with respect to the axis of the turbine rotor, and the inclination angle a =5-15 °, preferably 9-11 °; the radius of the intersection of the trailing edge 32 with the top edge 33 is smaller than the radius of the intersection of the trailing edge 32 with the rear disc 2.
Further, the turbine rotor (impeller) has an exit radius R, the connection P has a radius R1, R1= (0.75-0.85) R, preferably, R1=0.80R.
Further, the boss 34 has a radius R2, R2= (0.55-0.65) R, preferably, R2=0.60R.
The invention relates to a turbine rotor structure for a centrifugal pump, which can improve the flow guiding performance at the inlet of a blade 3 through the design of a confluence space S and a convex part 34, thereby reducing the flow loss of the centrifugal pump.
The invention relates to a turbine rotor structure for a centrifugal pump, which is characterized in that through the design of a step part 4, the step part 4 is positioned at the radial outer end of a connecting part P, a converging space S is formed between the inner side surface of a front disc 1 and a top edge 33, the converging space S is positioned at the radial inner end of the connecting part P, and the step part 4 comprises a plurality of steps 41, so that a turbine rotor (impeller) has a step-changed enlarged space at the outlet of the turbine rotor, the cavitation resistance of the centrifugal pump can be effectively improved, the flow loss of the centrifugal pump is reduced, and the overall performance of the centrifugal pump is improved. The design of the confluence space S and the bulge part 34 can improve the flow guiding performance at the inlet of the blade 3, thereby reducing the flow loss of the centrifugal pump.
The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (6)
1. A turbine rotor structure for centrifugal pump, it includes foreplate (1), after-disk (2), blade (3), a plurality of blades along circumference evenly distributed and connect between foreplate and after-disk, the foreplate has the water inlet, the blade has leading edge (31), trailing edge (32), top edge (33), the top edge is connected with the medial surface of foreplate, the leading edge is located the upstream of trailing edge, its characterized in that: the medial surface of preceding dish has step portion (4), and the medial surface of preceding dish is connecting portion (P) with the junction of apical margin, and the length size of connecting portion is far less than the length or the connecting portion of apical margin (33) for the tie point, and the step portion is located the radial outer end of connecting portion, constitutes between the medial surface of preceding dish and the apical margin space (S) that converges, and the space that converges is located the radial inner of connecting portion.
2. A turbine rotor structure for a centrifugal pump according to claim 1, characterized in that the step portion (4) comprises a plurality of steps (41) of 3-8 steps; the step part enables the thickness of the front disc (1) to gradually reduce from the connecting part (P) to the outlet radius R of the turbine rotor.
3. A turbine rotor structure for a centrifugal pump according to claim 2, characterized in that the vanes (3) have a bulge (34) formed between the top edge (33) and the front edge (31), the bulge having a bulge end at the beginning of the joining space (S) which is in a tapering configuration in the direction of the water flow; the leading edge is arc-shaped convex structure, and the arc-shaped convex structure extends towards the axis direction of the turbine rotor.
4. A turbine rotor structure for centrifugal pumps according to claim 3, characterized in that the trailing edge (32) is arranged obliquely with respect to the axis of the turbine rotor, with an inclination angle a =5-15 °; the radius of the intersection of the trailing edge (32) and the top edge (33) is smaller than the radius of the intersection of the trailing edge and the rear disc.
5. A turbine rotor structure for a centrifugal pump according to claim 4, characterized in that the turbine rotor has an outlet radius R, the connection (P) has a radius R1, R1= (0.70-0.90) R.
6. A turbine rotor structure for a centrifugal pump according to claim 5, characterized in that the projections (34) have a radius R2, R2= (0.50-0.70) R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211353864.2A CN115492791A (en) | 2022-11-01 | 2022-11-01 | Turbine rotor structure for centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211353864.2A CN115492791A (en) | 2022-11-01 | 2022-11-01 | Turbine rotor structure for centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115492791A true CN115492791A (en) | 2022-12-20 |
Family
ID=85115258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211353864.2A Withdrawn CN115492791A (en) | 2022-11-01 | 2022-11-01 | Turbine rotor structure for centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115492791A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116696786A (en) * | 2023-07-04 | 2023-09-05 | 浙江宏业装备科技有限公司 | Pump device for ice slurry cleaning system |
-
2022
- 2022-11-01 CN CN202211353864.2A patent/CN115492791A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116696786A (en) * | 2023-07-04 | 2023-09-05 | 浙江宏业装备科技有限公司 | Pump device for ice slurry cleaning system |
| CN116696786B (en) * | 2023-07-04 | 2024-04-02 | 浙江山江水务科技有限公司 | Pump device for ice slurry cleaning system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20221220 |
|
| WW01 | Invention patent application withdrawn after publication |