CN110242612B - Centrifugal impeller with splitter blades - Google Patents
Centrifugal impeller with splitter blades Download PDFInfo
- Publication number
- CN110242612B CN110242612B CN201910491352.4A CN201910491352A CN110242612B CN 110242612 B CN110242612 B CN 110242612B CN 201910491352 A CN201910491352 A CN 201910491352A CN 110242612 B CN110242612 B CN 110242612B
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- China
- Prior art keywords
- blades
- cover plate
- splitter
- rear cover
- impeller
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- 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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- 238000000034 method Methods 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 abstract description 14
- 230000010349 pulsation Effects 0.000 abstract description 6
- 238000009792 diffusion process Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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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
-
- 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
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/688—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- External Artificial Organs (AREA)
Abstract
The invention discloses a centrifugal impeller with flow dividing blades, which mainly comprises a front cover plate, blades, flow dividing blades and a rear cover plate, wherein an inner cavity is formed between the front cover plate and the rear cover plate at a certain distance, a plurality of blades are uniformly distributed on the inner side of the rear cover plate from the center to the periphery in a spiral shape, adjacent blades separate the inner cavities between the front cover plate and the rear cover plate and form a flow passage, a flow passage outlet is formed at the edge of the flow passage close to the rear cover plate, and two flow dividing blades are uniformly arranged at the flow passage outlet; the front cover plate, the blades, the splitter blades and the rear cover plate are formed by adopting a stamping process, and a closed impeller is formed by welding. The invention has the beneficial effects that: when the fluid flows out of the impeller, the flow dividing blades inhibit the diffusion of the fluid, so that the probability of pressure pulsation in the pump and vortex formation at the outlet of the impeller is reduced, and the running stability and efficiency of the pump are improved; the flow dividing blades are shorter and are only arranged at the outlet of the impeller, so that the influence on the displacement coefficient of the flow channel is small, and the influence on the efficiency of the pump is small.
Description
Technical Field
The invention relates to the field of vane pumps, in particular to a centrifugal impeller with flow dividing vanes.
Background
Vibration concerns the stability of pump operation and has been one of the key issues of research. The dynamic and static interference of the rotating and stationary parts inside the pump causes pressure pulsations within the pump, thereby causing vibration of the pump.
The use of splitter vanes is one of the main methods of suppressing pressure pulsations in the pump. At present, there are two main types of splitter blades: one is the impeller of the one-time split vane, add a split vane in the middle of every runner, its advantage is that can improve the flow field distribution in the impeller effectively, but in the small flow, the vane density is insufficient, the restriction to fluid is small, the impeller outlet produces the phenomenon such as jet-wake, secondary flow, etc.; another is a secondary splitter vane impeller, where one long splitter vane and two short splitter vanes are placed in each flow path, but the secondary splitter vane flow path is narrower, which can result in a decrease in pump efficiency. In addition, the diameters of the inlet edges of the two flow dividing blades are smaller, and the flow dividing blades are longer, so that the input of shaft power can be increased, and the flow field distribution in the flow channel can be changed. In summary, the prior art: on one hand, the fluid at the outlet of the impeller is easy to diffuse, pressure pulsation is induced, the running stability of the pump is affected, and the efficiency of the pump is reduced; on the other hand, the longer flow dividing blades of the main flow can influence the movement state of the fluid in the pump flow channel while inhibiting the diffusion of the fluid at the impeller outlet.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a centrifugal impeller with flow dividing blades.
The invention aims at being completed by the following technical scheme: the centrifugal impeller with the splitter blades mainly comprises a front cover plate, blades, splitter blades, a rear cover plate, a runner and a runner outlet, wherein the front cover plate and the rear cover plate are arranged at a certain distance to form an internal cavity, a plurality of blades are uniformly distributed on the inner side of the rear cover plate from the center to the periphery in a spiral manner, the adjacent blades divide the internal cavity between the front cover plate and the rear cover plate and form the runner, the runner forms the runner outlet at the edge close to the rear cover plate, and two splitter blades are uniformly arranged at the runner outlet; the front cover plate, the blades, the splitter blades and the rear cover plate are formed by adopting a stamping process and are welded to form a closed impeller.
Furthermore, the blades and the splitter blades are cylindrical equal-thickness blades, the thickness of each blade is t, and the thickness of each splitter blade is t 2 =0.5-0.6 t.
Further, the number of the blades is Z, and the angle theta 2 between the blades and the splitter blade is=360/3Z.
Further, the length of the splitter blade is about 15% of the blade; the outlet side diameter D 2 of the splitter blade is the same as the blade and the inlet side diameter d=0.9 to 0.95D 2 of the splitter blade.
The beneficial effects of the invention are as follows:
1. When the fluid flows out of the impeller, the flow dividing blades inhibit the diffusion of the fluid, so that the probability of pressure pulsation in the pump and vortex formation at the outlet of the impeller is reduced, and the running stability and efficiency of the pump are improved;
2. The flow dividing blades are shorter and are only arranged at the outlet of the impeller, so that the influence on the displacement coefficient of the flow channel is small, and the influence on the efficiency of the pump is small.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a plan view of the structure of the present invention.
Fig. 3 is a cross-sectional view of the structure of the present invention.
Reference numerals illustrate: front cover plate 1, blade 2, splitter blade 3, back cover plate 4, runner 5, runner outlet 6.
Detailed Description
The invention will be described in detail below with reference to the attached drawings:
Examples: as shown in the drawing, the centrifugal impeller with the splitter blades mainly comprises a front cover plate 1, blades 2, splitter blades 3, a rear cover plate 4, a runner 5 and a runner outlet 6, wherein the front cover plate 1 and the rear cover plate 4 are arranged at a certain distance to form an internal cavity, the inner side of the rear cover plate 4 is uniformly distributed with a plurality of blades 2 spirally from the center to the periphery, the adjacent blades 2 divide the internal cavity between the front cover plate 1 and the rear cover plate 4 and form the runner 5, the runner 5 forms the runner outlet 6 at the edge close to the rear cover plate 4, and two splitter blades 3 are uniformly arranged at the runner outlet 6; the front cover plate 1, the blades 2, the splitter blades 3 and the rear cover plate 4 are formed by adopting a stamping process and are welded to form a closed impeller.
Preferably, the blades 2 and the splitter blades 3 are cylindrical equal-thickness blades, the thickness of the blade 2 is t, the thickness t 2＝0.5～0.6t(t2 of the splitter blades 3 is too large to reduce the displacement coefficient of the runner, and too small to have insufficient strength).
Preferably, the number of the blades 2 is Z, and the angle θ 2 =360/3Z between the blades 2 and the splitter blade 3.
Preferably, the length of the splitter vane 3 is about 15% of the length of the vane 2 (too short to inhibit diffusion of the impeller outlet fluid, too long to affect the flow pattern inside the pump flow path); the outlet side diameter D 2 of the splitter blade 3 is the same as the blade 2, and the inlet side diameter d=0.9 to 0.95D 2 of the splitter blade 3.
The working process of the invention comprises the following steps: when the impeller works, fluid is sucked from the impeller inlet and enters each flow passage 5 of the impeller, and the blades 2 do work on the fluid so that the fluid flows out of the impeller. When fluid passes through the splitter blades 3, the splitter blades 3 do work, inhibit the diffusion of the fluid, reduce the pressure pulsation in the pump and the probability of vortex formation at the impeller outlet, and improve the stability and efficiency of the pump.
It should be understood that equivalents and modifications to the technical scheme and the inventive concept of the present invention should fall within the scope of the claims appended hereto.
Claims (2)
1. A centrifugal impeller with splitter blades, characterized by: the novel flow dividing device comprises a front cover plate (1), blades (2), flow dividing blades (3), a rear cover plate (4), flow channels (5) and flow channel outlets (6), wherein a certain distance is reserved between the front cover plate (1) and the rear cover plate (4), an inner cavity is formed, a plurality of blades (2) are uniformly distributed on the inner side of the rear cover plate (4) from the center to the periphery in a spiral shape, the inner cavities between the front cover plate (1) and the rear cover plate (4) are separated by the adjacent blades (2) and form the flow channels (5), the flow channels (5) form the flow channel outlets (6) at the edge close to the rear cover plate (4), and two flow dividing blades (3) are uniformly distributed at the flow channel outlets (6); the front cover plate (1), the blades (2), the splitter blades (3) and the rear cover plate (4) are formed by adopting a stamping process and are welded to form a closed impeller;
The blades (2) and the splitter blades (3) are cylindrical equal-thickness blades, the thickness of the blades (2) is t, and the thickness t 2 = 0.5-0.6 t of the splitter blades (3);
the length of the splitter blade (3) is 15% of the length of the blade (2); the diameter D 2 of the outlet side of the splitter blade (3) is the same as that of the blade (2), and the diameter d=0.9 to 0.95D 2 of the inlet side of the splitter blade (3).
2. The splitter vane centrifugal impeller of claim 1, wherein: the number of the blades (2) is Z, and the angle theta 2 between the blades (2) and the splitter blade (3) is 360 degrees/3Z.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910491352.4A CN110242612B (en) | 2019-06-06 | 2019-06-06 | Centrifugal impeller with splitter blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910491352.4A CN110242612B (en) | 2019-06-06 | 2019-06-06 | Centrifugal impeller with splitter blades |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110242612A CN110242612A (en) | 2019-09-17 |
| CN110242612B true CN110242612B (en) | 2024-04-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910491352.4A Active CN110242612B (en) | 2019-06-06 | 2019-06-06 | Centrifugal impeller with splitter blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110242612B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905850A (en) * | 2019-10-28 | 2020-03-24 | 天津怡和嘉业医疗科技有限公司 | Impeller and fan for ventilation treatment equipment and ventilation treatment equipment |
| CN110953186A (en) * | 2019-12-26 | 2020-04-03 | 兰州理工大学 | Centrifugal pump impeller with separated blades |
| CN112855607A (en) * | 2021-01-18 | 2021-05-28 | 江苏大学 | Centrifugal pump impeller with a plurality of short blades |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2426027Y (en) * | 1999-03-13 | 2001-04-04 | 格伦德福什联合股份有限公司 | Radial structure type impeller for centrifugal pump |
| CN102748324A (en) * | 2012-07-11 | 2012-10-24 | 上海东方泵业(集团)有限公司 | Centrifugal pump impeller with low specific speed |
| CN103953583A (en) * | 2014-04-04 | 2014-07-30 | 上海第一水泵厂有限公司 | Horizontal self-balanced centrifugal pump with first-stage compound impeller |
| JP2015183575A (en) * | 2014-03-24 | 2015-10-22 | 三菱重工業株式会社 | Channel formation part, casing and centrifugal type rotary machine |
| CN210290254U (en) * | 2019-06-06 | 2020-04-10 | 南方泵业股份有限公司 | Centrifugal impeller with splitter blades |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10669854B2 (en) * | 2017-08-18 | 2020-06-02 | Pratt & Whitney Canada Corp. | Impeller |
-
2019
- 2019-06-06 CN CN201910491352.4A patent/CN110242612B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2426027Y (en) * | 1999-03-13 | 2001-04-04 | 格伦德福什联合股份有限公司 | Radial structure type impeller for centrifugal pump |
| CN102748324A (en) * | 2012-07-11 | 2012-10-24 | 上海东方泵业(集团)有限公司 | Centrifugal pump impeller with low specific speed |
| JP2015183575A (en) * | 2014-03-24 | 2015-10-22 | 三菱重工業株式会社 | Channel formation part, casing and centrifugal type rotary machine |
| CN103953583A (en) * | 2014-04-04 | 2014-07-30 | 上海第一水泵厂有限公司 | Horizontal self-balanced centrifugal pump with first-stage compound impeller |
| CN210290254U (en) * | 2019-06-06 | 2020-04-10 | 南方泵业股份有限公司 | Centrifugal impeller with splitter blades |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110242612A (en) | 2019-09-17 |
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