CA2710896C - Axial flow fan for external rotor - Google Patents
Axial flow fan for external rotor Download PDFInfo
- Publication number
- CA2710896C CA2710896C CA2710896A CA2710896A CA2710896C CA 2710896 C CA2710896 C CA 2710896C CA 2710896 A CA2710896 A CA 2710896A CA 2710896 A CA2710896 A CA 2710896A CA 2710896 C CA2710896 C CA 2710896C
- Authority
- CA
- Canada
- Prior art keywords
- axial flow
- external rotor
- disposed
- flow fan
- annular cylinder
- 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.)
- Active
Links
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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
An axial flow fan for an external rotor, comprising an axial flow blade, a support, and an external rotor motor, wherein the support comprises an annular cylinder and multiple installation pins extended from the outside of the annular cylinder, and the axial flow blade is disposed on the installation pin, the annular cylinder is fit on an external rotor of the external rotor motor, and inner wall of the annular cylinder is interference-fit with outer wall of the external rotor. The invention features simple and convenient assembling, reliable connection, high production efficiency, low requirement for workers, and low production cost.
Description
AXIAL FLOW FAN FOR EXTERNAL ROTOR
FIELD OF THE INVENTION
[0001] The invention relates to an axial flow fan for an external rotor.
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
[0001] The invention relates to an axial flow fan for an external rotor.
BACKGROUND OF THE INVENTION
[0002] A typical structure for a conventional axial flow fan for an external rotor is that an air blade is welded with external surface of a housing of the external rotor.
However, requirements for a welding position and a welding direction of the air blade are high, and a high-level welding technology is needed, which cause inconvenient operation, high production cost and low production efficiency. Another structure for an axial flow fan for an external rotor employs a groove disposed on outer surface of the housing of the external rotor for receiving the air blade, but installation of this axial flow fan is not reliable.
SUMMARY OF THE INVENTION
However, requirements for a welding position and a welding direction of the air blade are high, and a high-level welding technology is needed, which cause inconvenient operation, high production cost and low production efficiency. Another structure for an axial flow fan for an external rotor employs a groove disposed on outer surface of the housing of the external rotor for receiving the air blade, but installation of this axial flow fan is not reliable.
SUMMARY OF THE INVENTION
[0003] In view of the above-described problem, it is one objective of the invention to provide an axial flow fan for an external rotor that features simple assembling, high production efficiency, reliable connection, and low production cost.
[0004] The invention is implemented as follows:
[0005] An axial flow fan for an external rotor, comprising an axial flow blade, a support, and an external rotor motor, wherein the support comprises an annular cylinder and multiple installation pins extended from the outside of the annular cylinder, and the axial flow blade is disposed on the installation pin, and the annular cylinder is fit on an external rotor of the external rotor motor.
[0006] The annular cylinder is integrally formed, or formed by an annular body with an opening.
[0007] Inner wall of the annular cylinder is interference-fit with outer wall of the external rotor.
[0008] A screw hole is disposed on the installation pin, and the axial flow blade is disposed on the installation pin via nuts and bolts.
[0009] A through hole is disposed on the installation pin, and the axial flow blade is disposed on the installation pin via riveting.
[0010] The axial flow blade is disposed on the installation pin via welding.
[0011] The axial flow blade is disposed on the installation pin via buckling.
[0012] The annular cylinder and the installation pin are integrally formed, or the annular cylinder is connected to the installation pin via welding, buckling, or riveting.
[0013] An external convex ring is disposed between the annular cylinder and the installation pin
[0014] Advantages of the invention are: the annular cylinder on the support is fit on the housing of the external rotor of the external rotor motor, and the inner wall of the annular cylinder is interference-fit with the outer wall of the external rotor, which implement simple assembling, reliable connection, high production efficiency, low requirement for workers, and low production cost; the external convex ring disposed between the annular cylinder and the installation pin is capable of increasing radial dimension and ensuring stable force transfer.
BRIEF DESCRIPTION OF THE DRAWINGS
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG 1 is a schematic view of an axial flow fan for an external rotor of the invention;
[0016] FIG 2 is a cross-sectional view of FIG. 1 along a line C-C;
[0017] FIG 3 is a schematic view of another axial flow fan for an external rotor of the invention; and
[0018] FIG 4 is a cross-sectional view of FIG 3 along a line D-D.
DETAILED DESCRIPTION OF THE EMBODIMENTS
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] Further description of the invention will be given below in conjunction with accompanying drawings and specific embodiments.
[0020] Embodiment 1
[0021] As shown in FIGS. 1 and 2, an axial flow fan for an external rotor 31 comprises an axial flow blade 1, a support 2, and an external rotor motor 3. The support 2 comprises an annular cylinder 21 and multiple installation pins 22 extended from the outside of the annular cylinder 21, the axial flow blade 1 is disposed on the installation pin 22, and an external convex ring 23 is disposed between the annular cylinder 21 and the installation pin 22 whereby increasing radial dimension and improving structural strength of the installation pin 22. The annular cylinder 21 is fit on an external rotor 31 of the external rotor motor 3, and inner wall of the annular cylinder 21 is interference-fit with outer wall of the external rotor 31. The annular cylinder 21 is an integrally formed enclosed cylinder.
The external rotor motor 3 comprises an inner stator 32 and an external rotor 31. A screw hole is disposed on the installation pin 22, and the axial flow blade 1 is disposed on the installation pin 22 via nuts 41 and bolts 42. A through hole is disposed on the installation pin 22, and the axial flow blade 1 is disposed on the installation pin 22 via riveting.
Alternatively, the axial flow blade 1 is disposed on the installation pin 22 via welding or buckling.
The external rotor motor 3 comprises an inner stator 32 and an external rotor 31. A screw hole is disposed on the installation pin 22, and the axial flow blade 1 is disposed on the installation pin 22 via nuts 41 and bolts 42. A through hole is disposed on the installation pin 22, and the axial flow blade 1 is disposed on the installation pin 22 via riveting.
Alternatively, the axial flow blade 1 is disposed on the installation pin 22 via welding or buckling.
[0022] The annular cylinder 21 and the installation pin 22 are integrally formed, or the annular cylinder 21 is connected to the installation pin 22 via welding, buckling, or riveting.
[0023] The invention features simple and convenient assembling, reliable connection, high production efficiency, low requirement for workers, and low production cost.
[00241 Embodiment 2 [0025] As shown in FIGS. 3 and 4, an axial flow fan for an external rotor 31 comprises an axial flow blade 1, a support 2, and an external rotor motor 3. The support 2 comprises an annular cylinder 21 and multiple installation pins 22 extended from the outside of the annular cylinder 21, and the axial flow blade 1 is disposed on the installation pin 22. The annular cylinder 21 is fit on an external rotor 31 of the external rotor motor 3, and inner wall of the annular cylinder 21 is interference-fit with outer wall of the external rotor 31. The annular cylinder 21 is a closed cylinder formed by an annular body with an opening via a fastening device 5 or via welding. The external rotor motor 3 comprises an inner stator 32 and an external rotor 31.
A screw hole is disposed on the installation pin 22, and the axial flow blade 1 is disposed on the installation pin 22 via nuts 42 and bolts 41. A through hole is disposed on the installation pin 22, and the axial flow blade 1 is disposed on the installation pin 22 via riveting.
Alternatively, the axial flow blade 1 is disposed on the installation pin 22 via welding or a buckle.
[0026] The annular cylinder 21 and the installation pin 22 are integrally formed, or the annular cylinder 21 is connected to the installation pin 22 via welding or riveting or via a buckle.
[0027] The invention features simple and convenient assembling, reliable connection, high production efficiency, low requirement for workers, and low production cost.
[00241 Embodiment 2 [0025] As shown in FIGS. 3 and 4, an axial flow fan for an external rotor 31 comprises an axial flow blade 1, a support 2, and an external rotor motor 3. The support 2 comprises an annular cylinder 21 and multiple installation pins 22 extended from the outside of the annular cylinder 21, and the axial flow blade 1 is disposed on the installation pin 22. The annular cylinder 21 is fit on an external rotor 31 of the external rotor motor 3, and inner wall of the annular cylinder 21 is interference-fit with outer wall of the external rotor 31. The annular cylinder 21 is a closed cylinder formed by an annular body with an opening via a fastening device 5 or via welding. The external rotor motor 3 comprises an inner stator 32 and an external rotor 31.
A screw hole is disposed on the installation pin 22, and the axial flow blade 1 is disposed on the installation pin 22 via nuts 42 and bolts 41. A through hole is disposed on the installation pin 22, and the axial flow blade 1 is disposed on the installation pin 22 via riveting.
Alternatively, the axial flow blade 1 is disposed on the installation pin 22 via welding or a buckle.
[0026] The annular cylinder 21 and the installation pin 22 are integrally formed, or the annular cylinder 21 is connected to the installation pin 22 via welding or riveting or via a buckle.
[0027] The invention features simple and convenient assembling, reliable connection, high production efficiency, low requirement for workers, and low production cost.
Claims (6)
1. An axial flow fan for an external rotor, the axial flow fan comprising multiple axial flow blades, a support, an external rotor motor comprising an external rotor, and a fastening device, wherein:
said support comprises an arc-shaped strip, an external convex ring, and multiple installation pins, said arc-shaped strip comprising two ends and an outer wall;
said external convex ring is disposed on said outer wall;
said multiple installation pins are disposed on said external convex ring;
said multiple axial flow blades are disposed on said multiple installation pins;
said two ends are connected to each other via said fastening device, and said arc-shaped strip is fit on said external rotor; and when in use, said rotor rotates in unison with said arc-shaped strip, said external convex ring, and said axial flow blades.
said support comprises an arc-shaped strip, an external convex ring, and multiple installation pins, said arc-shaped strip comprising two ends and an outer wall;
said external convex ring is disposed on said outer wall;
said multiple installation pins are disposed on said external convex ring;
said multiple axial flow blades are disposed on said multiple installation pins;
said two ends are connected to each other via said fastening device, and said arc-shaped strip is fit on said external rotor; and when in use, said rotor rotates in unison with said arc-shaped strip, said external convex ring, and said axial flow blades.
2. The axial flow fan of claim 1, wherein an inner wall of said arc-shaped strip is interference-fit with an outer wall of said external rotor.
3. The axial flow fan of claim 1, wherein a screw hole is disposed on said installation pin; and said multiple axial flow blades axe disposed on said multiple installation pins via nuts and bolts.
4. The axial flow fan of claim 1, wherein a through hole is disposed on said installation pin; and said multiple axial flow blades are disposed on said installation pins via riveting.
5. The axial flow fan of claim 1, wherein said multiple axial flow blades are disposed on said multiple installation pins via welding.
6. The axial flow fan of claim 1, wherein said arc-shaped strip and said multiple installation pins are integrally formed, or said arc-shaped strip is connected to said multiple installation pins via welding or riveting, or via a buckle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200617260U CN201439764U (en) | 2009-07-27 | 2009-07-27 | Outer rotor axial flow fan |
| CN200920061726.0 | 2009-07-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2710896A1 CA2710896A1 (en) | 2011-01-27 |
| CA2710896C true CA2710896C (en) | 2015-11-03 |
Family
ID=42544434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2710896A Active CA2710896C (en) | 2009-07-27 | 2010-07-22 | Axial flow fan for external rotor |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20110020121A1 (en) |
| CN (1) | CN201439764U (en) |
| CA (1) | CA2710896C (en) |
| MX (1) | MX2010008159A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588310A (en) * | 2012-03-07 | 2012-07-18 | 台州市格贝尔机电有限公司 | Stepless speed-regulation fan with external-rotor motor |
| DE102014009051A1 (en) * | 2014-06-24 | 2015-12-24 | Tlt-Turbo Gmbh | Impeller for axial fan |
| CN211258879U (en) * | 2018-08-15 | 2020-08-14 | 熵零技术逻辑工程院集团股份有限公司 | Fan |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2451970A (en) * | 1945-03-03 | 1948-10-19 | Vornado Trust | Mounting for fan assemblies |
| US2681708A (en) * | 1950-09-01 | 1954-06-22 | Gail E Mix | Fan construction |
| US3969805A (en) * | 1974-12-23 | 1976-07-20 | The Trane Company | Method of constructing an axial flow fan |
| US4597555A (en) * | 1983-09-02 | 1986-07-01 | Franklin Electric Co., Inc. | Electric motor mount |
| GB8507623D0 (en) * | 1985-03-23 | 1985-05-01 | Smiths Industries Plc | Fans |
| DE202004010088U1 (en) * | 2004-06-25 | 2004-09-09 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Impeller, in particular for an axial fan |
| DE202006011899U1 (en) * | 2006-08-03 | 2007-12-13 | Ebm-Papst Mulfingen Gmbh & Co. Kg | fan wheel |
| US8672649B2 (en) * | 2007-10-10 | 2014-03-18 | Delta T Corporation | Ceiling fan system with brushless motor |
-
2009
- 2009-07-27 CN CN2009200617260U patent/CN201439764U/en not_active Expired - Lifetime
-
2010
- 2010-07-05 US US12/830,363 patent/US20110020121A1/en not_active Abandoned
- 2010-07-22 CA CA2710896A patent/CA2710896C/en active Active
- 2010-07-26 MX MX2010008159A patent/MX2010008159A/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| CA2710896A1 (en) | 2011-01-27 |
| US20110020121A1 (en) | 2011-01-27 |
| MX2010008159A (en) | 2011-01-26 |
| CN201439764U (en) | 2010-04-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20130226 |