CN2247732Y - Roof axial flow ventilator - Google Patents
Roof axial flow ventilator Download PDFInfo
- Publication number
- CN2247732Y CN2247732Y CN 95235285 CN95235285U CN2247732Y CN 2247732 Y CN2247732 Y CN 2247732Y CN 95235285 CN95235285 CN 95235285 CN 95235285 U CN95235285 U CN 95235285U CN 2247732 Y CN2247732 Y CN 2247732Y
- Authority
- CN
- China
- Prior art keywords
- impeller
- electric motor
- guiding plate
- roof
- flow guiding
- 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
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Abstract
The utility model relates to a roof axial flow ventilator, which is composed of an air cylinder which comprises an outer shell, an air cap, a built-in electric motor and an impeller. When the electric motor is connected with the impeller directly, the electric motor, the impeller and the air cylinder are fixed together through an electric motor support on which a transition cambered surface type flow guiding plate is arranged. The flow guiding plate, the impeller and a blade are provided with unequal space, the inlet mounting angle of the flow guiding plate is 19-27 DEG, and the outlet mounting angle of the flow guiding plate is 0-8 DEG. The utility model can reduce the noise of a blower better, the blower efficiency can be improved, and the aerodynamic performance of the blower is improved.
Description
The utility model relates to a kind of roof propeller fan.
Existing roof propeller fan is made up of impeller, air duct, blast cap, motor substantially, and motor is fixed together by Steel Support and air duct.In existing structure, because the linking intensity of motor and air duct has only been considered in the design of Steel Support, and ignored it to being transferred the influence of gas, when making that being transferred gas flows through Steel Support after impeller quickens, increased the running resistance of air-flow, thereby existing roof propeller fan ubiquity problems such as noise is big, eddy current is serious, static pressure is low, fan efficiency is low.Therefore, need a kind of low noise of design, efficient, and can effectively reduce eddy current, improve the roof propeller fan of static pressure, satisfy market demand.
Task of the present utility model is: provide that a kind of noise is low, efficient is high, and can alleviate eddy current effectively, improve the roof propeller fan of static pressure.
The solution of the utility model task is: the roof propeller fan is made up of the air duct of forming shell, blast cap and built-in motor, impeller substantially, behind motor and the impeller direct connection, be fixed together by electric machine support with air duct, have the transition cabochon guide plate of arranging with the impeller blade irregular pitch on the electric machine support.
The stagger angle of the transition cabochon guide plate of the utility model electric machine support is 19 °～27 °, and exit installation angle is 0 °～8 °.
Compare with existing roof propeller fan, the utility model is owing to adopted the electric machine support that has transition cabochon deflector structure, when having guaranteed motor and air duct linking intensity, reduced the air-flow running resistance, reduced the impact between movement air flow and the electric machine support, and the arrangement of transition cabochon guide plate and impeller blade irregular pitch has been avoided the disturbance same period, sound pressure level is descended, thereby reduced noise; Simultaneously, transition cabochon guide plate makes impeller blade outlet dynamic pressure become static pressure, and airflow direction is axially, has reduced the generation of eddy current effectively, has eliminated the loss that the peripheral compoent of velocity is brought, and fan efficiency is improved, and has improved the aeroperformance of blower fan.
Accompanying drawing is an embodiment of the present utility model.
Fig. 1 is a roof propeller fan plan view, and Fig. 2 is the electric machine support plan view, and Fig. 3 is a transition cabochon guide plate sectional drawing.
As shown in Figure 1 and Figure 2,1 air duct, 2 blast caps, 3 impellers, 4 motors, 5 electric machine supports, 6 impeller blades, 7 electric machine support inner stiffener rings, 8 struts, 9 outer stiffening plates, 10 transition cabochon guide plates, 11 locating flanges, 12 motor fastening rings.
Embodiment:
As shown in Figure 1 and Figure 2, motor 4 is fixed together with electric machine support 5 by locating flange 11 and motor fastening ring 12, impeller 3 and motor 4 direct connections, blast cap 2, air duct 1 are connected as a single entity by strut 8 with outer stiffening plate 9, and electric machine support inner stiffener ring 7 tightens together with outer stiffening plate 9, air duct 1.After motor 4 started, gas changed impeller 3 outlet dynamic pressures into static pressure through evenly quickening by impeller blade 6 when flowing through transition cabochon guide plate 10, last, is transferred gas and discharges via blast cap 2.In this embodiment, transition cabochon guide plate 10 stagger angles are that 19 °～27 °, exit installation angle are 0 °～8 ° and arrange with impeller blade 6 irregular pitch.
Claims (2)
1, roof propeller fan, form by the air duct of forming shell (1), blast cap (2) and built-in motor (4), impeller (3), behind motor (4) and impeller (3) direct connection, be fixed together by electric machine support (5) with air duct (1), it is characterized in that electric machine support (5) has the transition cabochon guide plate of arranging with impeller blade (6) irregular pitch (10).
2, roof according to claim 1 propeller fan is characterized in that stagger angle is that 19 °～27 °, exit installation angle are 0 °～8 ° transition cabochon guide plate 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95235285 CN2247732Y (en) | 1995-12-07 | 1995-12-07 | Roof axial flow ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95235285 CN2247732Y (en) | 1995-12-07 | 1995-12-07 | Roof axial flow ventilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2247732Y true CN2247732Y (en) | 1997-02-19 |
Family
ID=33878996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95235285 Expired - Fee Related CN2247732Y (en) | 1995-12-07 | 1995-12-07 | Roof axial flow ventilator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2247732Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109206A (en) * | 2009-10-17 | 2011-06-29 | J·曾巴法 | Wind-powered ventilator that creates positive and negative pressures |
| CN103148002A (en) * | 2013-03-08 | 2013-06-12 | 浙江钜联风能机械有限公司 | Double-seal roof ventilator |
| CN110892159A (en) * | 2017-04-21 | 2020-03-17 | 艾威普科公司 | Axial flow fan of cooling tower with hollow disc/annular structure |
-
1995
- 1995-12-07 CN CN 95235285 patent/CN2247732Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109206A (en) * | 2009-10-17 | 2011-06-29 | J·曾巴法 | Wind-powered ventilator that creates positive and negative pressures |
| CN102109206B (en) * | 2009-10-17 | 2015-01-14 | J·曾巴法 | Wind-powered ventilator that creates positive and negative pressures |
| CN103148002A (en) * | 2013-03-08 | 2013-06-12 | 浙江钜联风能机械有限公司 | Double-seal roof ventilator |
| CN103148002B (en) * | 2013-03-08 | 2015-05-20 | 浙江钜联风能机械有限公司 | Double-seal roof ventilator |
| CN110892159A (en) * | 2017-04-21 | 2020-03-17 | 艾威普科公司 | Axial flow fan of cooling tower with hollow disc/annular structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |