CN2262128Y - Front bended sweepforward assembled axial-flow blower - Google Patents
Front bended sweepforward assembled axial-flow blower Download PDFInfo
- Publication number
- CN2262128Y CN2262128Y CN 95244262 CN95244262U CN2262128Y CN 2262128 Y CN2262128 Y CN 2262128Y CN 95244262 CN95244262 CN 95244262 CN 95244262 U CN95244262 U CN 95244262U CN 2262128 Y CN2262128 Y CN 2262128Y
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- CN
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- Prior art keywords
- blade
- blower
- fan
- sweepforward
- axis
- 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 front bended sweepforward assembled axial-flow blower, which belongs to an appliance for ventilation and exhaustion in the technical field of fluid machinery. A blade axial line of the blower of the utility model is bended toward the rotation direction of the blower, the cross section of a blade forms a wing shape, a blower impeller is composed of 4 or 7 blades which are assembled together by screws. The blower blades have high rigidity, the blower has less secondary flow loss and good aerodynamic performance, and the requirement of users for different parameters can be satisfied through the combination of different blades numbers and rotation speed. The utility model is especially suitable for the requirements of more varieties and small batch production.
Description
Antecurvature sweepforward assembly type axial-flow blower is the equipment that belongs to the air draft that is used in the field of fluid machinery to ventilate.
Low noise broad-leaved axial-flow blower in prior art all adopts the plate blade that has sweepforward wide outside and narrow inside, this blade obtains by becoming the circular rector design, its maximum load is positioned at blade outer rim place, increased the secondary flow loss at blade outer rim place, and blade rigid is relatively poor, easily produces vibration and distortion during work, produces friction for avoiding blade and flow blower casing, must strengthen radial clearance between blade and flow blower casing, increase secondary flow loss so again and increased noise.When adopting the design of change circular rector, maximum outlet velocity is positioned at blade outer rim place, the frictional loss that has increased gas and flow blower casing.
The purpose of the present utility model is in order to overcome the shortcoming of low noise broad-leaved axial-flow blower in the prior art, to increase blade stiffness, reduce the blower fan secondary flow loss, making axial-flow blower have better aeroperformance.
Content of the present utility model is a kind of antecurvature sweepforward assembly type axial-flow blower of design, and this fan blade axis is to the bending of blower fan sense of rotation, and the fan blade cross section is airfoil, and draught fan impeller is to be assembled with screw by the multi-disc blade.
Fig. 1 is single blade plane figure of antecurvature sweepforward assembly type axial-flow blower
Fig. 2 is the plane outspread drawing of five sections of fan blade.
1 is crooked axis of runner blade among the figure, the 2nd, and draught fan impeller diameter, the 3rd, blade outer rim, the 4th, blade inner edge, the 5th, petiole, the 6th, blower fan wheel disc, the 7th, fan blade.
Concrete enforcement of the present utility model be fan blade (7) to the bending of blower fan sense of rotation, at blade outer rim 3 places, the bending radius of axis of runner blade 1 is R
1, at blade inner edge 4 places, the bending radius of axis of runner blade 1 is R
2, the two sections crooked circular arcs and the impeller diameter 2 of axis of runner blade 1 are tangent, and the middle part of axis of runner blade 1 is a straightway, and the section of fan blade 7 is airfoil.Fan blade 7 is screwed by two screw holes on the petiole 5 and is installed on the blower fan wheel disc 6, and draught fan impeller 6 is assembled by 4 or 7 fan blades 7.The material of fan blade 7 can be aluminum alloy, ABS plastic or glass fibre reinforced plastics.
Because this fan blade is made to the bending of blower fan sense of rotation, blade outer rim place will produce a centripetal force when work, under the effect of this power, will reduce the secondary flow loss at blade outer rim place, and the top speed that makes the draught fan impeller outlet port is to the blade off-centring, can reduce the frictional loss of air-flow and flow blower casing, and the bending owing to axis of runner blade will produce an outside component at blade inner edge place, can reduce the secondary flow loss at blade inner edge place.Blade section is the rigidity that airfoil can increase blade, also can improve the aeroperformance of blower fan largely.This blower fan has adopted the assembly type blade wheel structure, and combination that therefore can be by different blade quantities and rotating speed is specially adapted to needs wide in variety, small lot batch manufacture to satisfy the requirement of user to different parameters.
Claims (3)
1, a kind of antecurvature sweepforward assembly type axial-flow blower that is assembled into draught fan impeller by fan blade (7) and blower fan wheel disc (6), it is characterized in that fan blade (7) is to the bending of blower fan sense of rotation, locate in fan blade outer rim (3), the bending radius of axis of runner blade (1) is R
1, to locate at blade inner edge (4), the bending radius of axis of runner blade (1) is R
2, the two sections crooked circular arcs and the impeller diameter (2) of axis of runner blade (1) are tangent, and the middle part of axis of runner blade (1) is a straightway, and the section of fan blade (7) is airfoil.
2, it is characterized in that by claim 1 and described antecurvature sweepforward assembly type axial-flow blower that fan blade (7) is screwed by two screw holes on the petiole (5) and be installed on the blower fan wheel disc (6) that draught fan impeller is to be assembled by 4 or 7 fan blades (7).
3, by claim 1 or 2 described antecurvature sweepforward assembly type axial-flow blowers, it is characterized in that the available aluminum alloy of fan blade (7), ABS plastic or glass fibre reinforced plastics are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95244262 CN2262128Y (en) | 1995-06-26 | 1995-06-26 | Front bended sweepforward assembled axial-flow blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95244262 CN2262128Y (en) | 1995-06-26 | 1995-06-26 | Front bended sweepforward assembled axial-flow blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2262128Y true CN2262128Y (en) | 1997-09-10 |
Family
ID=33884690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95244262 Expired - Fee Related CN2262128Y (en) | 1995-06-26 | 1995-06-26 | Front bended sweepforward assembled axial-flow blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2262128Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316164C (en) * | 2004-08-19 | 2007-05-16 | 保定天威集团有限公司 | Low-noise strong blast volume axial-flow fan |
| CN103527510A (en) * | 2013-09-16 | 2014-01-22 | 苏州格园机械有限公司 | Fan structure of mowing machine |
| CN106823180A (en) * | 2017-02-28 | 2017-06-13 | 上海朗沁投资管理有限公司 | Air purifier |
-
1995
- 1995-06-26 CN CN 95244262 patent/CN2262128Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316164C (en) * | 2004-08-19 | 2007-05-16 | 保定天威集团有限公司 | Low-noise strong blast volume axial-flow fan |
| CN103527510A (en) * | 2013-09-16 | 2014-01-22 | 苏州格园机械有限公司 | Fan structure of mowing machine |
| CN106823180A (en) * | 2017-02-28 | 2017-06-13 | 上海朗沁投资管理有限公司 | Air purifier |
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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 |