CN2437887Y - Axial ventilator with hemmed blade - Google Patents
Axial ventilator with hemmed blade Download PDFInfo
- Publication number
- CN2437887Y CN2437887Y CN00242397U CN00242397U CN2437887Y CN 2437887 Y CN2437887 Y CN 2437887Y CN 00242397 U CN00242397 U CN 00242397U CN 00242397 U CN00242397 U CN 00242397U CN 2437887 Y CN2437887 Y CN 2437887Y
- Authority
- CN
- China
- Prior art keywords
- blade
- impeller
- blades
- propeller fan
- axial
- 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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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
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses an axial-flow ventilator with hemmed blades, and relates to an improvement of an axial-flow ventilator structure. The axial-flow ventilator with hemmed blades comprises a single-stage axial-flow ventilator composed of a motor, an impeller and a current collector in the prior art, wherein, the impeller is composed of blades and a hub, and each blade of the impeller is bent in the opposite direction of inlet air flow at a place which is kept with R1 from an axle center, wherein, the R1 is equal to 0.8 subtracting 0.9 R (R is the radius of the impeller), and the bent blades of the impeller has an included angle sigma in the range of 20 to 80 DEG with the vertical plane of an axis of the fan. The utility model decreases differential pressure near the outer edges of the blades, weakens the induced flow at the edge part, and thus obtains the purpose of reducing noise and enhancing air volume.
Description
The utility model relates to the manufacturing of propeller fan, is specially the improvement of its blade structure.
For a long time, propeller fan is extensively applied to all trades and professions because of it is simple in structure, easily manufactured always, especially requires the little low pressure ventilation occasion of power, and the outdoor unit in for example all kinds of air conditioners nearly all adopts this ventilator.But because its noise problem is not controlled effectively so far, therefore in the utilization process, the environment around noise is given has caused very big negative effect, influences people's quality of life.The noise of air conditioner outdoor machine has brought a lot of unnecessary interference for people's study, work, rest etc.By to existing single-stage propeller fan noise production the analysis showed that the aerodynamic noise that wheel rotation produces is one of main source of total noise of centrifuge, and the shape of impeller blade unreasonable be to produce the higher fundamental cause of aerodynamic noise.
The purpose of this utility model is, at the deficiencies in the prior art, provides a kind of propeller fan with crimping blade, thereby changes the flow characteristic of air-flow for blade edge, to reduce noise, reduces flow losses.
The purpose of this utility model realizes in the following manner.
Propeller fan with crimping blade described in the utility model comprises the single-stage propeller fan that is made of motor of the prior art, impeller and slip ring, and impeller comprises blade and wheel hub, it is characterized in that, each blade of described impeller is at distance axle center R
1Locate initial opposite direction bending to charge air flow, wherein, R
1=0.8-0.9R, R are the radius of impeller, and the angle δ on blade after its bending and blower fan axis normal plane is in 20 ° of-80 ° of scopes.The curve form of described blade can be smooth arc, also can be broken line shape, or earlier along the bending of charge air flow direction, be folded to the crotch shape of contrary charge air flow direction then, wherein crooked earlier axial distance is in the 2-10mm scope.
Propeller fan of the prior art can be divided into straight flat, FC or lean forward+sweepforward etc. according to blade shape and position.For blade, it comes the blade face of flow path direction to be called suction surface in face of air inlet, carry air inlet and come the blade face of flow path direction to be called pressure surface, the pressure reduction between positive suction surface along with distance of shaft centers from increase and increase, therefore, near the pressure reduction maximum blade outward edge, it is mobile to streaming of suction surface that its result makes the gas generation walk around the edge from pressure surface, and produce induced drag thus, consumed energy, thereby cause the minimizing of air output, also increased noise.The utility model makes blade its outer edges place be the opposite direction bending of an angle to charge air flow, and near the pressure reduction of blade outward edge is reduced, and has weakened it and has induced mobile.Reach the reduction noise, improve the purpose of air quantity.
Be further described below by embodiment and accompanying drawing.
Fig. 1 is the structural representation with embodiment of crooked arc shaped blade described in the utility model.
Fig. 2 is the structural representation with embodiment of broken line shape blade described in the utility model.
Fig. 3 be described in the utility modelly have earlier to front curve, the embodiment's of the crotch shape blade after being folded to then structural representation.
Referring to Fig. 1, (1) is motor, and impeller hub (2) is arranged on its output shaft.(3) for being installed in the FC blade on the wheel hub.(4) be slip ring.Described blade is at distance axle center R
1Locate initial arc-shaped bend backward, when the radial dimension R of blade is 15cm, R
1For being 12cm.δ is the blade after the bending and the angle on blower fan axis normal plane, and present embodiment is 45 °.Arrow is represented the charge air flow direction among the figure.
Experiment shows that the crimping blade of use present embodiment is compared and used straight-vaned fan performance of the prior art to improve a lot, and concrete test data is as follows: leaf roll, 2138 cubic metres/hour of air quantity, 54.5 decibels of noises; 2096 cubic metres/hour of straight leaf air quantity, 56.6 decibels of noises.Make it under the fair situation of air quantity at motor speed-regulating, test data is as follows: 2106 cubic metres/hour of leaf roll air quantity, 54.0 decibels of noises; 2096 cubic metres/hour of straight leaf air quantity, 56.6 decibels of noises.If make the noise situation that maintains an equal level, the air quantity data that then record are as follows: leaf roll, 2315 cubic metres/hour of air quantity; 56.4 decibels of noises; 2096 cubic metres/hour of straight leaf air quantity, 56.6 decibels of noises.Find out that by above data compared to existing technology, use the noise of the blower fan of arc crimping blade to reduce more than 2.5 decibels, air quantity improves more than 200 cubic metres/hour under equal noise situations under equal air quantity.
Referring to Fig. 2, the blade in the present embodiment becomes the broken line bending, makes processing more convenient.The angle δ on blade after the bending and blower fan axis normal plane is 30 °.
Referring to Fig. 3, the blade in the present embodiment is crotch shape, promptly earlier along the bending of charge air flow direction, its axial distance is reached about 5mm, is folded to contrary charge air flow direction then.The angle δ on blade after the bending and blower fan axis normal plane is 60 °, and the axial distance along the bending of charge air flow direction is about 5mm earlier.
Claims (4)
1. the propeller fan with crimping blade comprises the single-stage propeller fan that is made of motor of the prior art, impeller and slip ring, and impeller comprises blade and wheel hub, it is characterized in that, each blade of described impeller apart from axle center R
1Locate initial opposite direction bending to charge air flow, wherein, R
1=0.8-0.9R, R are the radius of impeller, and the angle δ on blade after its bending and blower fan axis normal plane is in 20 ° of-80 ° of scopes.
2. propeller fan as claimed in claim 1 is characterized in that, the curve form of described blade is smooth arc.
3. propeller fan as claimed in claim 1 is characterized in that, the curve form of described blade is a broken line shape.
4. propeller fan as claimed in claim 1 is characterized in that, described blade is earlier along the bending of charge air flow direction, be folded to the crotch shape of contrary charge air flow direction then, and wherein crooked earlier axial distance is in the 2-10mm scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00242397U CN2437887Y (en) | 2000-07-10 | 2000-07-10 | Axial ventilator with hemmed blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00242397U CN2437887Y (en) | 2000-07-10 | 2000-07-10 | Axial ventilator with hemmed blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2437887Y true CN2437887Y (en) | 2001-07-04 |
Family
ID=33602558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00242397U Expired - Fee Related CN2437887Y (en) | 2000-07-10 | 2000-07-10 | Axial ventilator with hemmed blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2437887Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009111956A1 (en) * | 2008-03-12 | 2009-09-17 | Han Wei | An axial flow fan for decreasing the noise and the energy consumption |
| CN101825114A (en) * | 2009-03-06 | 2010-09-08 | 韩玮 | Axial flow fan capable of reducing energy consumption and noise |
| CN102003413A (en) * | 2010-12-23 | 2011-04-06 | 美的集团有限公司 | Fan blade of ventilation fan |
| CN102374193A (en) * | 2010-08-13 | 2012-03-14 | 施乐百股份公司 | Impeller Used For Fan |
| CN106640759A (en) * | 2016-12-13 | 2017-05-10 | 广东美的环境电器制造有限公司 | Axial-flow type fan |
| CN108138786A (en) * | 2015-10-16 | 2018-06-08 | 雷姆控股有限公司 | For the connecting element of wheel hub being connected to blade in industrial axial flow blower and the blade system for including the connecting element |
| CN111946667A (en) * | 2020-07-28 | 2020-11-17 | 东风马勒热***有限公司 | Fan with bent blades |
-
2000
- 2000-07-10 CN CN00242397U patent/CN2437887Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009111956A1 (en) * | 2008-03-12 | 2009-09-17 | Han Wei | An axial flow fan for decreasing the noise and the energy consumption |
| CN101825114A (en) * | 2009-03-06 | 2010-09-08 | 韩玮 | Axial flow fan capable of reducing energy consumption and noise |
| CN102374193A (en) * | 2010-08-13 | 2012-03-14 | 施乐百股份公司 | Impeller Used For Fan |
| CN102374193B (en) * | 2010-08-13 | 2016-08-03 | 施乐百股份公司 | Impeller for blower fan |
| CN102003413A (en) * | 2010-12-23 | 2011-04-06 | 美的集团有限公司 | Fan blade of ventilation fan |
| CN108138786A (en) * | 2015-10-16 | 2018-06-08 | 雷姆控股有限公司 | For the connecting element of wheel hub being connected to blade in industrial axial flow blower and the blade system for including the connecting element |
| CN106640759A (en) * | 2016-12-13 | 2017-05-10 | 广东美的环境电器制造有限公司 | Axial-flow type fan |
| CN111946667A (en) * | 2020-07-28 | 2020-11-17 | 东风马勒热***有限公司 | Fan with bent blades |
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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 |