CN109973427B - Multi-wing centrifugal fan blade, impeller and multi-wing centrifugal fan - Google Patents
Multi-wing centrifugal fan blade, impeller and multi-wing centrifugal fan Download PDFInfo
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- CN109973427B CN109973427B CN201910390070.5A CN201910390070A CN109973427B CN 109973427 B CN109973427 B CN 109973427B CN 201910390070 A CN201910390070 A CN 201910390070A CN 109973427 B CN109973427 B CN 109973427B
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- centrifugal fan
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
- F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
- F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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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 application discloses multi-wing centrifugal fan blade, impeller and multi-wing centrifugal fan, wherein multi-wing centrifugal fan blade includes: an airfoil-shaped blade portion and an arc-shaped blade portion; the tail end of the wing-shaped blade part is connected with the head end of the arc-shaped blade part. In this application, with the design of multi-wing centrifugal fan blade for wing section blade portion and circular arc type blade portion, can freely adjust blade exit angle through adjusting circular arc type blade portion, the best bent angle design of wing section blade portion simultaneously, make the bent angle of blade can not be too big, and the wing section blade portion can reduce the import impact loss and the blade tail edge separation loss of circular arc blade portion, thereby reduce the import impact loss and the blade tail edge separation loss of whole blade, make the blade satisfy optimal pneumatic performance, it is little to have solved current no bent angle, the little and little technical problem of blade tail edge separation loss of import impact loss.
Description
Technical Field
The application belongs to the technical field of fans, and particularly relates to a multi-wing centrifugal fan blade, an impeller and a multi-wing centrifugal fan.
Background
The blade angle at the inlet and outlet of the multi-wing centrifugal fan has great influence on the fan performance, the impeller of the existing multi-wing centrifugal fan is designed by adopting an equal-thickness circular arc blade profile, and the blade angle at the inlet and outlet can be adjusted at will by the method so as to meet the requirements of different fan aerodynamic performances.
However, the constant-thickness arc blade profile has the disadvantages of large impact loss of airflow at the inlet, serious separation loss of the trailing edge of the blade and the like, so that better aerodynamic performance is difficult to obtain. The airfoil blade structure can reduce the impact loss of airflow at the inlet and the separation loss of the tail edge of the blade, and the aerodynamic performance of the airfoil blade structure is relatively excellent. However, in the case of the airfoil structure satisfying the inlet and outlet angles, the bending angle is too large, the airfoil structure is greatly changed, and it is difficult to satisfy the optimal aerodynamic performance.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to design a multi-blade centrifugal fan blade with small bend angle, small inlet impact loss, and small blade trailing edge separation loss.
Disclosure of Invention
In view of this, the present application provides a multi-blade centrifugal fan blade, an impeller and a multi-blade centrifugal fan, which solve the technical problems of the existing blade with no bend angle, small inlet impact loss and small blade trailing edge separation loss.
The present application provides in a first aspect a multi-blade centrifugal fan blade comprising: an airfoil-shaped blade portion and an arc-shaped blade portion;
the tail end of the wing-shaped blade part is connected with the head end of the arc-shaped blade part.
Preferably, the first and second electrodes are formed of a metal,
the length D of the arc-shaped blade part and the length D of the airfoil-shaped blade part have the following relationship:
h is
Preferably, the first and second electrodes are formed of a metal,
h is specifically
Preferably, the first and second electrodes are formed of a metal,
the wing-shaped blade portion and the arc-shaped blade portion are integrally formed.
Preferably, the first and second electrodes are formed of a metal,
the wing-shaped blade part and the arc-shaped blade part are detachably connected.
Preferably, the first and second electrodes are formed of a metal,
first recess has been seted up to the tail end of airfoil profile blade portion, the head end of circular arc profile blade portion be equipped with be used for inlay insert in first arch in the first recess.
Preferably, the first and second electrodes are formed of a metal,
the second recess has been seted up to the head end of circular arc type blade portion, the tail end of airfoil type blade portion be equipped with be used for inlay insert in the second arch in the second recess.
The present application provides in a second aspect a multi-wing centrifugal fan impeller comprising: the multiple-wing centrifugal fan blade of the first aspect.
The third aspect of the present application provides a multi-blade centrifugal fan, comprising: a multi-winged centrifugal fan impeller according to the second aspect.
According to the technical scheme, the embodiment of the application has the following advantages:
the application provides a multi-wing centrifugal fan blade, includes: an airfoil-shaped blade portion and an arc-shaped blade portion; the tail end of the wing-shaped blade part is connected with the head end of the arc-shaped blade part. In this application, with the design of multi-wing centrifugal fan blade for wing section blade portion and circular arc type blade portion, can freely adjust blade exit angle through adjusting circular arc type blade portion, the best bent angle design of wing section blade portion simultaneously, make the bent angle of blade can not be too big, and the wing section blade portion can reduce the import impact loss and the blade tail edge separation loss of circular arc blade portion, thereby reduce the import impact loss and the blade tail edge separation loss of whole blade, make the blade satisfy optimal pneumatic performance, it is little to have solved current no bent angle, the little and little technical problem of blade tail edge separation loss of import impact loss.
Drawings
FIG. 1 is a schematic structural diagram of a multi-blade centrifugal fan blade according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of an impeller of a multi-blade centrifugal fan according to an embodiment of the present disclosure;
wherein the reference numbers are as follows:
o, multi-wing centrifugal fan blades; 1. an airfoil blade portion; 2. a circular arc-shaped blade portion; 3. a trailing end of the airfoil blade portion; 4. the head end of the arc blade part; 5. a first groove; 6. a first protrusion.
Detailed Description
The embodiment of the application provides a multi-wing centrifugal fan blade, an impeller and a multi-wing centrifugal fan, and solves the technical problems that an existing non-bent angle is small, the inlet impact loss is small, and the blade tail edge separation loss is small.
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, a schematic structural diagram of a multi-blade centrifugal fan blade in an embodiment of the present application includes: an airfoil blade 1 and a circular arc blade 2; the tail end 3 of the wing-shaped blade part is connected with the head end 4 of the arc-shaped blade part.
In this embodiment, with multi-wing centrifugal fan blade design for wing section blade portion 1 and convex blade portion 2, can freely adjust blade exit angle through adjusting arc type blade portion 2, simultaneously wing section blade portion 1's best bent angle design, make the bent angle of blade can not be too big, and wing section blade portion 1 can reduce arc type blade portion 2's import impact loss and blade trailing edge separation loss, thereby reduce the import impact loss and the blade trailing edge separation loss of whole blade, make the blade satisfy optimal aerodynamic performance, the current technical problem that does not have the bent angle little, little and the little blade of blade trailing edge separation loss of import impact loss.
The foregoing is a first embodiment of a multi-blade centrifugal fan blade provided in this application, and the following is a second embodiment of a multi-blade centrifugal fan blade provided in this application.
Referring to fig. 1, a schematic structural diagram of a multi-blade centrifugal fan blade in an embodiment of the present application includes: an airfoil blade 1 and a circular arc blade 2; the tail end 3 of the wing-shaped blade part is connected with the head end 4 of the arc-shaped blade part.
In order to make the performance of the blade better, the length D of the circular arc blade part 2 should not be too long, and the length D of the circular arc blade part 2 and the length D of the airfoil-shaped blade part 1 have the following relationship:
h is
Further, h is specifically
Further, the airfoil blade 1 and the circular arc blade 2 are integrally molded.
Further, the airfoil blade 1 and the circular arc blade 2 are detachably connected.
When the multi-wing centrifugal fan blade is used, the machining die for the arc blade part can adopt uniform blade blanks, the length of the arc blade part 2 is designed according to the requirement of the inlet and outlet angles of the impeller so as to meet the system requirement, the manufacturing cost of the die can be greatly reduced, and the manufacturing cost is effectively reduced. Simultaneously satisfying under the unchangeable condition of wing section blade portion structure, can adjust the blade angle of importing and imports and exports through convex blade portion in a flexible way to satisfy the design requirement of different operating modes.
Further, first recess 5 has been seted up to airfoil blade portion's tail end 3, and the head end 4 of circular arc type blade portion is equipped with and is used for inlaying first arch 6 in first recess.
Preferably, the head end 4 of the circular arc blade part is provided with a second groove, and the tail end 3 of the wing-shaped blade part is provided with a second protrusion for being embedded in the second groove.
In this embodiment, with multi-wing centrifugal fan blade design for wing section blade portion 1 and convex blade portion 2, can freely adjust blade exit angle through adjusting arc type blade portion 2, simultaneously wing section blade portion 1's best bent angle design, make the bent angle of blade can not be too big, and wing section blade portion 1 can reduce arc type blade portion 2's import impact loss and blade trailing edge separation loss, thereby reduce the import impact loss and the blade trailing edge separation loss of whole blade, make the blade satisfy optimal aerodynamic performance, the current technical problem that does not have the bent angle little, little and the little blade of blade trailing edge separation loss of import impact loss.
Referring to fig. 2, an embodiment of the present application further provides a multi-blade centrifugal fan impeller, including: the multi-blade centrifugal fan blade O of the first and second embodiments is implemented.
In this embodiment, with multi-wing centrifugal fan blade O design for wing section blade portion 1 and convex blade portion 2, can freely adjust blade exit angle through adjusting arc type blade portion 2, simultaneously wing section blade portion 1's best bent angle design, make the bent angle of blade can not be too big, and wing section blade portion 1 can reduce the import impact loss and the blade trailing edge separation loss of arc type blade portion 2, thereby reduce the import impact loss and the blade trailing edge separation loss of whole blade, make the blade satisfy optimal aerodynamic performance, the current technical problem that does not have the bent angle little, little and the little blade of blade trailing edge separation loss of import impact loss.
The embodiment of the present application further provides a multi-blade centrifugal fan, including: the multi-bladed centrifugal fan wheel of example three.
In this embodiment, with multi-wing centrifugal fan blade design for wing section blade portion 1 and convex blade portion 2, can freely adjust blade exit angle through adjusting arc type blade portion 2, simultaneously wing section blade portion 1's best bent angle design, make the bent angle of blade can not be too big, and wing section blade portion 1 can reduce arc type blade portion 2's import impact loss and blade trailing edge separation loss, thereby reduce the import impact loss and the blade trailing edge separation loss of whole blade, make the blade satisfy optimal aerodynamic performance, the current technical problem that does not have the bent angle little, little and the little blade of blade trailing edge separation loss of import impact loss.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (4)
1. A multi-airfoil centrifugal fan blade, comprising: an airfoil-shaped blade portion and an arc-shaped blade portion;
the tail end of the wing-shaped blade part is connected with the head end of the arc-shaped blade part;
the wing-shaped blade part is detachably connected with the arc-shaped blade part and is used for adjusting the length of the arc-shaped blade part according to the inlet and outlet angles so as to meet the system requirement;
the tail end of the wing-shaped blade part is provided with a first groove, and the head end of the arc-shaped blade part is provided with a first bulge which is inserted into the first groove;
or
The head end of the arc-shaped blade part is provided with a second groove, and the tail end of the wing-shaped blade part is provided with a second bulge which is inserted into the second groove;
the length D of the arc-shaped blade part and the length D of the airfoil-shaped blade part have the following relationship:
h is
2. -a multi-winged centrifugal fan blade according to claim 1, said h being in particular
3. A multi-wing centrifugal fan impeller comprising: a multi-winged centrifugal fan blade according to any one of claims 1 to 2.
4. A multi-blade centrifugal fan, comprising: a multi-bladed centrifugal fan wheel as claimed in claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910390070.5A CN109973427B (en) | 2019-05-10 | 2019-05-10 | Multi-wing centrifugal fan blade, impeller and multi-wing centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910390070.5A CN109973427B (en) | 2019-05-10 | 2019-05-10 | Multi-wing centrifugal fan blade, impeller and multi-wing centrifugal fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109973427A CN109973427A (en) | 2019-07-05 |
| CN109973427B true CN109973427B (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910390070.5A Active CN109973427B (en) | 2019-05-10 | 2019-05-10 | Multi-wing centrifugal fan blade, impeller and multi-wing centrifugal fan |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0897479A4 (en) * | 1996-05-07 | 2001-12-05 | Rollo Entpr Ltd | An impeller and fan incorporating same |
| CN203463305U (en) * | 2013-09-07 | 2014-03-05 | 上海光菱机械科技有限公司 | Wing type centrifugal fan |
| US10100839B2 (en) * | 2013-12-11 | 2018-10-16 | Keihin Corporation | Centrifugal fan |
| CN205078497U (en) * | 2015-08-15 | 2016-03-09 | 蚌埠市蚌风风机有限公司 | Centrifugal fan single face machine airfoil fan |
| WO2018189931A1 (en) * | 2017-04-10 | 2018-10-18 | シャープ株式会社 | Centrifugal fan, moulding die, and fluid feeding device |
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- 2019-05-10 CN CN201910390070.5A patent/CN109973427B/en active Active
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