CN205225782U - Metal blade external rotor axial fan - Google Patents
Metal blade external rotor axial fan Download PDFInfo
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- CN205225782U CN205225782U CN201520834973.5U CN201520834973U CN205225782U CN 205225782 U CN205225782 U CN 205225782U CN 201520834973 U CN201520834973 U CN 201520834973U CN 205225782 U CN205225782 U CN 205225782U
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- leading edge
- fan blade
- blade
- external rotor
- edge
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Abstract
The utility model discloses a metal blade external rotor axial fan, including external rotor electric machine and a plurality of fan blade, wherein fan blade edge motor circumferencial direction distributes uniformly, the blade constitute for the leading edge carries out the transition to tail edge along certain angle, the leading edge appears for the sweepforward, the leading edge or the tail edge of fan blade wave portion has. The beneficial effects of the utility model are that: 1 )The position of leading edge for contacting the air current at first of fan blade also is the biggest position that is stressed simultaneously, designs the wave characteristics at the position of leading edge, can reduce the pressure of leading edge effectively. 2 )The wave characteristics is designed at the tail edge's of fan blade position, and at the in -process of fan blade to the air current acting, have the big vortex at tail edge's position and exist, according to the utility model discloses a wave characteristics can effectually reduce these big vortex to reduce the noise level. 3 )Realize from technology that it can to carry out simple improvement to stamping die. And also realize very easily to die casting die.
Description
Technical field
The utility model belongs to ventilation refrigeration industry blower fan technical field used, particularly relates to a kind of metal blade external rotor axial-flow fan.
Background technique
External rotor axial-flow fan, for inner rotor motor, has compact structure, the low and efficiency advantages of higher of noise, and metal fan blade is due to the relatively simple and relative low price extensive use in actual production of technique.Under current market prerequisite, client needs large air quantity to realize ventilation refrigeration radiating on the one hand, also must ask more and more high to noise figure on the other hand.
Model utility content
The purpose of this utility model overcomes the deficiencies in the prior art, provides a kind of and reduce noise, metal blade external rotor axial-flow fan rational in infrastructure.
This metal blade external rotor axial-flow fan, comprise external rotor electric machine and some fan blades, wherein fan blade distributes equably along motor circumferencial direction, and described blade is that leading edge is formed along certain angled transition to trailing edge, leading edge is forward sweep, and leading edge or the trailing edge of described fan blade have one wave part.
As preferably: described fan blade is 3 ~ 9.
As preferably: described fan blade is metal blade.
The beneficial effects of the utility model are:
1) leading edge of fan blade is the position contacting air-flow at first, is also simultaneously the maximum position of pressure, designs wave characteristics, effectively can reduce the pressure of leading edge at the position of leading edge.
2) wave characteristics is designed at the position of the trailing edge of fan blade, in the process that fan blade does work to air-flow, have large eddy current to exist at the position of trailing edge, the wave characteristics designed by the utility model effectively can reduce these large eddy current, thus reduces noise figure.
3) realize from technique, press tool is simply improved.And die casting mould is also easy to realize.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Description of reference numerals: external rotor electric machine 1, fan blade 2, leading edge 3, trailing edge 4, one wave part 5.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.Although the utility model will be described in conjunction with preferred embodiment, should know, not represent the utility model restriction in the described embodiment.On the contrary, the utility model will contain can be included in attached claims limit scope of the present utility model in alternative, modified model and equivalent.
As shown in Figure 1, this metal blade external rotor axial-flow fan, comprise external rotor electric machine 1 and some metal fan blades 2, wherein fan blade 2 distributes equably along motor circumferencial direction, and its Placement is welding, is threaded and the mode etc. of External rotor electric machine rotor integral die-cast.Described blade 2 is that leading edge 3 is formed along certain angled transition to trailing edge 4, and leading edge 3 is forward sweep, can reduce the impact of air flow inlet like this.Leading edge 3 or the trailing edge 4 of described fan blade 2 have one wave part 5, generally realize moulding by press tool or injection moulding.Due to the existence of these wave characteristics 5, effectively reduce the eddy current of leading edge 3 and trailing edge 4, thus reduce the noise figure of blower fan.Described fan blade 2 is 3 ~ 9, and the diameter of blower fan is not limit.
Claims (3)
1. a metal blade external rotor axial-flow fan, it is characterized in that: comprise external rotor electric machine (1) and some fan blades (2), wherein fan blade (2) distributes equably along motor circumferencial direction, described fan blade (2) is formed along certain angled transition to trailing edge (4) for leading edge (3), leading edge (3) is forward sweep, and leading edge (3) or the trailing edge (4) of described fan blade (2) have one wave part (5).
2. metal blade external rotor axial-flow fan according to claim 1, is characterized in that: described fan blade (2) is 3 ~ 9.
3. metal blade external rotor axial-flow fan according to claim 1, is characterized in that: described fan blade (2) is metal blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520834973.5U CN205225782U (en) | 2015-10-26 | 2015-10-26 | Metal blade external rotor axial fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520834973.5U CN205225782U (en) | 2015-10-26 | 2015-10-26 | Metal blade external rotor axial fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205225782U true CN205225782U (en) | 2016-05-11 |
Family
ID=55900851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520834973.5U Active CN205225782U (en) | 2015-10-26 | 2015-10-26 | Metal blade external rotor axial fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205225782U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180154A (en) * | 2017-12-27 | 2018-06-19 | 泛仕达机电股份有限公司 | A kind of fan ripple stent |
-
2015
- 2015-10-26 CN CN201520834973.5U patent/CN205225782U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180154A (en) * | 2017-12-27 | 2018-06-19 | 泛仕达机电股份有限公司 | A kind of fan ripple stent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |