CN106762806B - Centrifugal pump impeller with rectifying blades - Google Patents
Centrifugal pump impeller with rectifying blades Download PDFInfo
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- CN106762806B CN106762806B CN201710082658.5A CN201710082658A CN106762806B CN 106762806 B CN106762806 B CN 106762806B CN 201710082658 A CN201710082658 A CN 201710082658A CN 106762806 B CN106762806 B CN 106762806B
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- rectifying
- blades
- impeller
- centrifugal pump
- blade
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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
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
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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
- F04D29/247—Vanes elastic or self-adjusting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of centrifugal pumps, and particularly relates to a centrifugal pump impeller with rectifying blades. The rectifying blades are arranged in the impeller, the internal flow field in the impeller flow channel is improved through the rectifying action of the rectifying blades, the hydraulic loss caused by axial vortex motion in the impeller flow channel is reduced, the working efficiency of the centrifugal pump is improved, and the lift of the centrifugal pump is improved. The invention relates to a centrifugal pump impeller with a rectifying blade, which mainly comprises an impeller, the rectifying blade, a stud bolt, a torsion spring, a specially-made nut and a hexagon nut.
Description
Technical Field
The invention belongs to the technical field of centrifugal pumps, and particularly relates to a centrifugal pump impeller with rectifying blades.
Background
The pump is one of the most widely used fluid machines, has a plurality of types and huge domestic requirements, and the energy consumption of pump products accounts for about 21 percent of the total energy consumption of the whole society according to statistics of relevant departments, while the centrifugal pump is the most widely used product and accounts for about 70 percent of the total energy consumption. At present, the theory and design of centrifugal pumps are quite mature, domestic and foreign scholars research the internal flow field of centrifugal pump impellers to be complete, and as is known, under the condition of limited blades, the clamping degree of liquid by the blades is greatly weakened, so that the inertia of the liquid can be expressed, and therefore the actual flowing condition of the liquid in an impeller flow channel is approximately the superposition of axial vortex motion and through flow flowing through a fixed impeller. This flow condition increases hydraulic losses and affects the actual head of the centrifugal pump.
Disclosure of Invention
Aiming at the defects of the prior art, the invention mainly provides an optimization method aiming at the flow state, axial vortex in a runner of an impeller is improved through the installed rectifying blades, hydraulic loss in the runner is reduced, and the working efficiency of the centrifugal pump is improved.
The invention aims to install the rectifying blades in the impeller, improve the internal flow field in the impeller flow channel through the rectifying action of the rectifying blades, reduce the hydraulic loss caused by axial vortex motion in the impeller flow channel, improve the working efficiency of the centrifugal pump and improve the lift of the centrifugal pump.
The invention relates to a centrifugal pump impeller with rectifying blades, which has the working principle that the center line of an impeller flow passage is provided with rotatable short blades, namely the rectifying blades. The flow regulating device is arranged on the flow regulating blade, and the flow regulating blade can rotate within a certain range according to the flow (because the flow is different, the moving flow line of liquid in the flow channel is also different) so as to regulate the arrangement angle of the inlet and the outlet of the flow regulating blade to adapt to the movement of the fluid in the flow channel.
The invention mainly comprises an impeller, a rectifying blade, a stud bolt, a torsion spring, a special nut and a hexagon nut, wherein the rectifying blade is arranged at a position close to an outlet of a runner of the impeller as a short blade, can rotate around the axis of the stud bolt within a certain angle range, and is provided with a self-adjusting device which can adjust the inlet and outlet angles of the blade according to the flow;
the length of the blade of the rectifying blade is 0.35-0.55 times of the length of the blade of the impeller.
The inlet edge of the rectifying blade is thin and rounded, and the outlet edge of the rectifying blade is in smooth transition with the working surface of the rectifying blade.
The centrifugal pump impeller with the rectifying blades further comprises a torsion spring, a special nut and a hexagon nut, and the pre-tightening torsion of the torsion spring can be adjusted through the special nut and the hexagon nut; the torsion spring is sleeved on the double-end bolt, one end of the torsion spring is connected with the special nut, the other end of the torsion spring is connected with the centrifugal pump impeller, the inlet and outlet placement angles of the rectifying blades are controlled through the balance between the torsion of the torsion spring and the impact force of fluid on the rectifying blades, and the selection of the torsion spring is determined according to the flow of a design point of the centrifugal pump;
designing the inlet and outlet mounting angles of the flow-rate point lower rectifying blades to be consistent with the inlet and outlet mounting angles of the centrifugal pump impeller blades at the same radius point, wherein the inlet and outlet mounting angles of the rectifying blades can be adjusted according to the flow rate; the adjustable rotation angle is + -5 deg.
The rectifying blade is provided with a pin, an arc slideway with a small section of pin is arranged at the position of a rear cover plate in the impeller flow channel, the rectifying blade can rotate by taking a stud bolt as an axis, and the rotating range of the rectifying blade is controlled by the arc slideway of the pin;
the invention has the following beneficial effects:
the invention is mainly suitable for the centrifugal pump with few blades and large blade wrap angle, and can effectively improve the axial vortex motion in the impeller flow passage, reduce the hydraulic loss of the flow passage, improve the efficiency of the centrifugal pump and increase the lift by adding the rectifying blades to adjust the internal flow field in the impeller flow passage.
Drawings
FIGS. 1(a) and 1(b) are schematic views of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion of the adjusting device of the present invention;
FIG. 3 is an illustration of the operational principle of the fairing blade of the present invention;
in the figure: 1. the impeller comprises an impeller, 2 rectifying blades, 3 stud bolts, 4 torsion springs, 5 special nuts and 6 hexagon nuts.
Detailed Description
The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.
A centrifugal pump impeller structure with rectifying blades is shown in figure 1 and comprises an impeller 1, rectifying blades 2, stud bolts 3, torsion springs 4, special nuts 5 and hexagonal nuts 6, wherein the rectifying blades 2 are arranged at positions close to the outlet of the center line of a flow passage of the impeller as short blades.
As shown in fig. 2 and 3, the straightening vane 2 can rotate around the axis of the stud bolt 3 within a certain angle range, a pin on the straightening vane is placed in an arc-shaped slideway of a rear cover plate of the impeller, wherein the straightening vane 2 is in threaded connection with one end of the stud bolt 3, the other end of the stud bolt 3 is in threaded connection with a specially-made nut 5 and a hexagon nut 6, a torsion spring 4 is sleeved in the middle of the stud bolt, one end of the torsion spring 4 is connected to the impeller 1 of the centrifugal pump, and the other end of the torsion spring is connected to the specially-made.
As shown in fig. 2, the self-adjusting device of the straightening vane 2 mainly comprises a stud bolt 3, a torsion spring 4, a special nut 5 and a hexagon nut 6, and the pre-tightening torsion on the torsion spring 4 can be adjusted by adjusting the special nut 5 and the nut 6. The appropriate torsion spring 4 and the pre-tightening force of the torsion spring 4 can be selected according to the design parameters of the centrifugal pump.
As shown in fig. 3, the inlet and outlet placement angles of the rectifier blades 2 are adjustable, the adjustable rotation angle of the rectifier blades 2 is +/-5 degrees, wherein pins are arranged on the rectifier blades, an arc-shaped slideway with a small section of pin is arranged at the lower cover plate in the impeller flow channel, the rectifier blades 2 can rotate around the stud as the axis, and the rotation range of the rectifier blades is controlled by the arc length of the arc-shaped slideway with the pins. The inlet edge of the rectifying blade 2 is thin and rounded, and the outlet edge is in smooth transition with the working surface of the rectifying blade.
As shown in fig. 1, 2 and 3, the main characteristics are as follows: the rectifying blades 2 are used as short blades, the inlet and outlet angles of the blades can be adjusted according to the flow, and the rectifying blades 2 can rotate around the axis of the stud bolt 3 within a certain angle range to adapt to the movement of fluid in the flow channel, so that the internal flow field in the flow channel is improved.
Claims (5)
1. The utility model provides a take centrifugal pump impeller of rectifier blade, it mainly comprises impeller (1), rectifier blade (2) and stud (3), its characterized in that: a rectifying blade (2) is arranged on the center line of the impeller flow channel through a stud bolt (3), and the rectifying blade (2) is a short blade and is arranged at the position close to the outlet of the impeller; the rectifying blades (2) can rotate around the axis of the stud bolt (3) within a certain angle range, and the inlet and outlet angles of the rectifying blades (2) can be adjusted according to the flow;
the device is characterized by also comprising a torsion spring (4), a pre-tightening nut (5) and a hexagon nut (6), wherein the pre-tightening torsion of the torsion spring (4) is adjusted through the pre-tightening nut (5) and the hexagon nut (6); the torsion spring (4) is sleeved on the stud bolt (3), one end of the torsion spring (4) is connected with the pre-tightening nut (5), the other end of the torsion spring is connected with the impeller (1) of the centrifugal pump, the inlet and outlet placement angles of the rectifying blades are controlled through the balance between the torsion of the torsion spring and the impact force of the fluid on the rectifying blades (2), and the selection of the torsion spring is determined according to the flow of a design point of the centrifugal pump.
2. The centrifugal pump impeller with straightening vanes of claim 1, wherein: the length of the blades of the rectifying blades (2) is 0.35-0.55 times of the length of the blades of the impeller.
3. The centrifugal pump impeller with straightening vanes of claim 1, wherein: the inlet edge of the rectifying blade (2) is rounded, and the outlet edge of the rectifying blade is in smooth transition with the working surface of the rectifying blade.
4. The centrifugal pump impeller with straightening vanes of claim 1, wherein: the inlet and outlet placement angles of the lower rectifying blades (2) at the flow point are designed to be consistent with the inlet and outlet placement angles of the blades at the same radius point of the centrifugal pump impeller, wherein the inlet and outlet placement angles of the lower rectifying blades (2) are adjusted according to the flow, a pin is arranged on one side, close to the rear cover plate, of each rectifying blade (2), an arc-shaped slide way is arranged at the corresponding position of the pin on the rear cover plate, and the rectifying blades (2) can swing along the arc-shaped slide way.
5. The centrifugal pump impeller with straightening vanes of claim 4, wherein: the inlet and outlet placement angles of the rectifying blades (2) are adjusted according to the flow; the adjustable rotation angle is + -5 deg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710082658.5A CN106762806B (en) | 2017-02-16 | 2017-02-16 | Centrifugal pump impeller with rectifying blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710082658.5A CN106762806B (en) | 2017-02-16 | 2017-02-16 | Centrifugal pump impeller with rectifying blades |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106762806A CN106762806A (en) | 2017-05-31 |
| CN106762806B true CN106762806B (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710082658.5A Active CN106762806B (en) | 2017-02-16 | 2017-02-16 | Centrifugal pump impeller with rectifying blades |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167225A (en) * | 2018-02-12 | 2018-06-15 | 福建中研机电科技有限公司 | A kind of multistage variable air quantity motor blower fan and the motor with the fan blade |
| CN110985435A (en) * | 2019-12-05 | 2020-04-10 | 江苏大学 | Device for inhibiting mixed flow pump blade cavitation |
| CN111121581B (en) * | 2019-12-19 | 2022-07-22 | 航天海鹰(哈尔滨)钛业有限公司 | Quadruple guide blade measuring device |
| CN111921229B (en) * | 2020-10-14 | 2020-12-25 | 南昌市第三中学 | Extraction device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2124804A1 (en) * | 1971-05-19 | 1972-12-07 | Klein Schanzlin & Becker Ag | Centrifugal pump impeller with movable blades and deflection limiter |
| CN102221014A (en) * | 2010-04-16 | 2011-10-19 | 株式会社山田制作所 | Impeller for water pump |
| CN103573693A (en) * | 2013-11-12 | 2014-02-12 | 成都科盛石油科技有限公司 | Low-specific-speed centrifugal pump impeller |
| CN204878054U (en) * | 2015-07-07 | 2015-12-16 | 珠海格力电器股份有限公司 | Impeller structure, fan and air conditioner |
| CN205173050U (en) * | 2015-11-10 | 2016-04-20 | 上海沃克通用设备有限公司 | Antioverloading centrifugation impeller |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3901623A (en) * | 1974-02-08 | 1975-08-26 | Chandler Evans Inc | Pivotal vane centrifugal |
| JP4110693B2 (en) * | 1999-11-25 | 2008-07-02 | 株式会社デンソー | Rotating fan |
-
2017
- 2017-02-16 CN CN201710082658.5A patent/CN106762806B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2124804A1 (en) * | 1971-05-19 | 1972-12-07 | Klein Schanzlin & Becker Ag | Centrifugal pump impeller with movable blades and deflection limiter |
| CN102221014A (en) * | 2010-04-16 | 2011-10-19 | 株式会社山田制作所 | Impeller for water pump |
| CN103573693A (en) * | 2013-11-12 | 2014-02-12 | 成都科盛石油科技有限公司 | Low-specific-speed centrifugal pump impeller |
| CN204878054U (en) * | 2015-07-07 | 2015-12-16 | 珠海格力电器股份有限公司 | Impeller structure, fan and air conditioner |
| CN205173050U (en) * | 2015-11-10 | 2016-04-20 | 上海沃克通用设备有限公司 | Antioverloading centrifugation impeller |
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| CN106762806A (en) | 2017-05-31 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200218 Address after: 211200 No. 11 Chaxing Road, Baima Town, Lishui District, Nanjing City, Jiangsu Province Applicant after: Jiangsu Kaiquan Pump Industry Mfg. Co., Ltd. Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301 Applicant before: JIANGSU University |
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