CN203717449U - Outer-rotor circular-tube fan - Google Patents
Outer-rotor circular-tube fan Download PDFInfo
- Publication number
- CN203717449U CN203717449U CN201420041033.6U CN201420041033U CN203717449U CN 203717449 U CN203717449 U CN 203717449U CN 201420041033 U CN201420041033 U CN 201420041033U CN 203717449 U CN203717449 U CN 203717449U
- Authority
- CN
- China
- Prior art keywords
- drag reduction
- cylindrical shell
- fan
- air inlets
- blower fan
- 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.)
- Expired - Fee Related
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to the field of fan manufacturing, in particular to an outer-rotor circular-tube fan. The outer-rotor circular-tube fan comprises a cylindrical shell, air inlets and an impeller. The air inlets are formed in two ends of the cylindrical shell, and the impeller is arranged inside the cylindrical shell. A plurality of drag reduction grooves are tightly circumferentially distributed in the inner wall of the cylindrical shell, and the drag reduction grooves are the strip grooves provided with V-shaped cross sections. A flexible drag reduction layer coats the surfaces of the drag reduction grooves. The air inlets and the cylindrical shell are in circular arc transition connection. On the basis of nonsmooth surface drag reduction and flexible-wall drag reduction of bionics and through the grooved structure similar to sharkskin and the flexible drag reduction layer in the inner wall of the fan shell, and air flow penetrating the interior of the fan shell is subjected to double drag reduction, so that fraction energy consumption between the inner wall of the shell and the air flow can be reduced to a large extent; meanwhile, the two air inlets adopt circular arc transition, resistance at positions of the air inlets can be reduced, and overall operation efficiency is improved.
Description
Technical field
The utility model relates to blower fan and manufactures field, relates in particular to external rotor circular pipe blower fan.
Background technique
External rotor circular pipe blower fan is the Novel direct ventilator that a kind of advanced stretch forming technology is combined with aerodynamics, can directly be connected with round screw thread airduct (or pvc pipe), can greatly save pipeline mounting cost.Therefore its application in the mechanical ventilation system of the occasions such as hotel, supermarket, school, hospital is also more and more extensive.Existing external rotor circular pipe blower fan has generally included circular galvanized sheet housing, has crossed heat-carrying protection external rotor electric machine and efficient centrifugal impeller, has the advantages such as volume is little, lightweight, simple installation.
But in running, always there are some energy losses when blower fan, wherein the energy loss of most be blower fan inner air flow in process due to the viscosity of air itself and and inner walls between friction generation, be called surface friction drag.Therefore how to reduce the windage of Blower Housing inside and improve blower fan working efficiency and become an important Point of Strength in the design of external rotor circular pipe blower fan structure.
Model utility content
Technical problem to be solved in the utility model is to overcome the problems referred to above, and the external rotor circular pipe blower fan of a kind of effective minimizing resistance of air, raising blower fan working efficiency is provided.
The technical solution of the utility model is:
External rotor circular pipe blower fan, include cylindrical shell, be located at the air port at cylindrical shell two ends and be located at the impeller of cylindrical shell inside, it is characterized in that: on the inwall of described cylindrical shell, be closely placed with several drag reduction grooves along circumference, described drag reduction groove is that cross section is the strip-shaped grooves of V-type; The surface of described drag reduction groove is coated with the flexible drag reduction layer of one deck; Being connected between described two air ports and cylindrical shell all adopts arc transition to connect.
The length of described drag reduction groove equals the axial length of cylindrical shell.
Described flexible drag reduction layer adopts polyurea elastic paint.
The beneficial effects of the utility model are: the utility model is according to the thought of the non-smooth surface drag reduction of bionics and flexible wall drag reduction, by groove structure and the flexible drag reduction layer of similar sharkskin on Blower Housing inwall, realize dual drag reduction to being applied in the air stream of Blower Housing inside, reduced largely the friction energy-dissipating between inner walls and air stream; Adopt arc transition to connect to two air ports place simultaneously, to reduce the resistance of air stream when the inlets and putlets of ventilation, improved overall working efficiency.
Brief description of the drawings
Fig. 1 is the schematic perspective view of the utility model external rotor circular pipe blower fan.
Fig. 2 is the sectional view of the utility model external rotor circular pipe blower fan along A-A.
Fig. 3 is the sectional view of the utility model external rotor circular pipe blower fan along B-B.
Embodiment
Now by reference to the accompanying drawings the utility model is further described:
As shown in Figure 1 and Figure 2, the present embodiment is external rotor circular pipe blower fan, and it mainly includes cylindrical shell 1, is located at the air port 2 at cylindrical shell 1 two ends and is located at the impeller 3 of cylindrical shell 1 inside.
As shown in Figure 2 and Figure 3, on the inwall of described cylindrical shell 1, be closely placed with several drag reduction grooves 4 along circumference, described drag reduction groove 4 for cross section be the strip-shaped grooves of V-type.Described drag reduction groove 4 extends axially along cylindrical shell 1, and its length equals the axial length of cylindrical shell 1.
This thinking is to originate from the research of bionics to fish epidermises such as sharks.Be different from less this argument of the more smooth resistance in the pointed surface of traditional view, various results of study show: following current to small flute surfaces can more effectively reduce the surface friction drag of wall, triangle (V-type) groove especially with some scale is considered to the trench geometry of drag-reduction effect the best especially.Therefore the present embodiment, according to this drag principle, has multiple V-type drag reduction grooves 4 that extend along air-flow direction on cylindrical shell 1 inwall, realizes certain drag-reduction effect to running through the air stream of blower fan inside.When in external rotor circular pipe blower fan normal course of operation, air stream back and forth flows inner work of cylindrical shell 1 under impeller 3 turning efforts, and on cylindrical shell 1 inwall along the drag reduction groove 4 of air flow setting under the effect that flows to whirlpool, produce secondary vortices in the induction of the sharp point place of drag reduction groove 4, thereby weaken the exhibition that flows to whirlpool to motion, avoid air stream freely to clash into cylindrical shell 1 inwall, make near the air stream on the drag reduction groove 4 surfaces more steady ordered that moves.
The surface of described drag reduction groove 4 is coated with the flexible drag reduction layer 5 of one deck.Described flexible drag reduction layer 5 adopts polyurea elastic paint.The principle that realizes of flexible drag reduction layer 5 is based on bionics principle equally, can effectively improve the stability of motions of air stream, thereby reduces surface friction drag.The present embodiment is that polyurea elastic paint forms flexible wall on above-mentioned drag reduction groove 4 surface sprayings, cooperatively interacts with drag reduction groove 4, realizes dual drag reduction.
As shown in Figure 2, all adopt arc transition to connect being connected between two air ports 2 described in the present embodiment and cylindrical shell 1.In the time that air stream flow to the air port 2 of cross section relative narrower from cylindrical shell 1, the Connecting format of arc transition can reduce air resistance coefficient effectively, reduces windage, increases work efficiency.
The present embodiment is on the one hand in conjunction with drag reduction groove 4 be coated on the flexible drag reduction layer 5 on its surface, can largely reduce air stream at the interior friction energy-dissipating when mobile of cylindrical shell 1 under the two acting in conjunction; Realize being connected between cylindrical shell 1 and two air ports 2 by the mode of arc transition on the other hand, effectively reduce the resistance that air stream is subject in the time of turnover blower fan, greatly improved the working efficiency of external rotor circular pipe blower fan.
Claims (3)
1. external rotor circular pipe blower fan, include cylindrical shell, be located at the air port at cylindrical shell two ends and be located at the impeller of cylindrical shell inside, it is characterized in that: on the inwall of described cylindrical shell, be closely placed with several drag reduction grooves along circumference, described drag reduction groove is that cross section is the strip-shaped grooves of V-type; The surface of described drag reduction groove is coated with the flexible drag reduction layer of one deck; Being connected between described two air ports and cylindrical shell all adopts arc transition to connect.
2. according to external rotor circular pipe blower fan claimed in claim 1, it is characterized in that: the length of described drag reduction groove equals the axial length of cylindrical shell.
3. according to external rotor circular pipe blower fan claimed in claim 1, it is characterized in that: described flexible drag reduction layer adopts polyurea elastic paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420041033.6U CN203717449U (en) | 2014-01-23 | 2014-01-23 | Outer-rotor circular-tube fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420041033.6U CN203717449U (en) | 2014-01-23 | 2014-01-23 | Outer-rotor circular-tube fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203717449U true CN203717449U (en) | 2014-07-16 |
Family
ID=51156607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420041033.6U Expired - Fee Related CN203717449U (en) | 2014-01-23 | 2014-01-23 | Outer-rotor circular-tube fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203717449U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949120A (en) * | 2017-05-05 | 2017-07-14 | 吉林大学 | A kind of bionical Anti-erosion pipeline |
| CN109304260A (en) * | 2018-11-04 | 2019-02-05 | 西北农林科技大学 | A kind of cyclone separating tube of grain cleaning |
| CN110249735A (en) * | 2019-07-23 | 2019-09-20 | 沈阳农业大学 | Bionic flexible resistance-reducing material for mud-contacting component of paddy field machinery, preparation method and application |
| CN111894901A (en) * | 2020-07-28 | 2020-11-06 | 苏州顶裕节能设备有限公司 | Shark skin-imitated fan shell |
| CN113366254A (en) * | 2019-01-17 | 2021-09-07 | Fmc技术股份有限公司 | Low corrosion fluid conduit with sharp cross-sectional geometry |
| CN114076114A (en) * | 2021-11-16 | 2022-02-22 | 山东东艺数字科技有限公司 | Medical epidemic prevention and shock absorption bidirectional filtering breathing accessory |
-
2014
- 2014-01-23 CN CN201420041033.6U patent/CN203717449U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949120A (en) * | 2017-05-05 | 2017-07-14 | 吉林大学 | A kind of bionical Anti-erosion pipeline |
| CN109304260A (en) * | 2018-11-04 | 2019-02-05 | 西北农林科技大学 | A kind of cyclone separating tube of grain cleaning |
| CN113366254A (en) * | 2019-01-17 | 2021-09-07 | Fmc技术股份有限公司 | Low corrosion fluid conduit with sharp cross-sectional geometry |
| CN110249735A (en) * | 2019-07-23 | 2019-09-20 | 沈阳农业大学 | Bionic flexible resistance-reducing material for mud-contacting component of paddy field machinery, preparation method and application |
| CN111894901A (en) * | 2020-07-28 | 2020-11-06 | 苏州顶裕节能设备有限公司 | Shark skin-imitated fan shell |
| CN114076114A (en) * | 2021-11-16 | 2022-02-22 | 山东东艺数字科技有限公司 | Medical epidemic prevention and shock absorption bidirectional filtering breathing accessory |
| CN114076114B (en) * | 2021-11-16 | 2023-12-15 | 山东东艺数字科技有限公司 | Medical epidemic prevention shock absorption bidirectional filtering breathing accessory |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203717449U (en) | Outer-rotor circular-tube fan | |
| CN202157978U (en) | Energy-saving tunnel type axial flow fan | |
| CN204535458U (en) | A kind of energy-saving circulating water cooling tower | |
| CN107131785B (en) | High-efficiency rotational flow spoiler | |
| CN203230624U (en) | Centrifugal fan rotor, centrifugal fan and air cooling refrigerator | |
| CN205136069U (en) | Air purifier and air supply arrangement thereof | |
| CN204082617U (en) | A kind of throttling arrangement for centrifugal pump cavity | |
| CN201742265U (en) | Hollow shaft of three-phase asynchronous motor with air guide plates | |
| CN204553332U (en) | A kind of bionic non-smooth surface centrifugal fan blade | |
| CN203190583U (en) | Spherical-surface air outlet of wall-hanging air conditioner | |
| CN109488640B (en) | Cooling air outlet structure of rotor in magnetic suspension blower | |
| CN203670291U (en) | Pressure boost and energy conservation type centrifugal blower | |
| CN204755370U (en) | Fluid perturbation rectifier | |
| CN202869315U (en) | Air cooler with novel tubing structure | |
| CN203571924U (en) | Earth energy central air conditioner provided with Venturi tubes | |
| CN104578547A (en) | Motor casing with heat dissipation function | |
| CN204137312U (en) | Propeller for vessels | |
| CN103758788A (en) | Supercharging energy-saving type centrifugal fan | |
| CN204253447U (en) | The forward-type multi-wing centrifugal fan that a kind of performance is good | |
| CN202885417U (en) | Refrigerator with thermal insulation box | |
| CN203605367U (en) | Water cooling device and air conditioner outdoor unit thereof | |
| CN203051241U (en) | High-efficient low-noise draught fan | |
| CN201992743U (en) | Air purifier | |
| CN202597149U (en) | Cooling fan | |
| CN208623451U (en) | A kind of cooling structure on direct-drive motor casing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20170123 |