CN102588343A - Flexible hood of fan - Google Patents
Flexible hood of fan Download PDFInfo
- Publication number
- CN102588343A CN102588343A CN2012100964332A CN201210096433A CN102588343A CN 102588343 A CN102588343 A CN 102588343A CN 2012100964332 A CN2012100964332 A CN 2012100964332A CN 201210096433 A CN201210096433 A CN 201210096433A CN 102588343 A CN102588343 A CN 102588343A
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- blast cap
- flexible
- hood
- impeller
- blower fan
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Abstract
The invention relates to a flexible hood of a fan, belongs to the hood of the fan, and solves the problem that the usage and maintenance of the existing hood are inconvenient. A blow dryer of the fan comprises a wheel hub arranged in the center of the blow dryer, and a plurality same blades fixed on the wheel hub, wherein the plurality of blades and the wheel hub form an impeller; the flexible hood is adhered to the center of the impeller; the hood is a round surface sewed by a single-sided reflecting film flexible material with a leak resistance, a sun blocking performance and a fracture resistance, and the diameter d of the hood is less than the diameter D of the impeller; the edge of the flexible hood is sewed as a double-edge which is lined with a metal wire. The flexible hood provided by the invention is made of film flexible material, can be manufactured to different sizes according to demands, is low in manufacturing cost and convenient in transportation and installation, and does cause the equipment failure even if the hood develops a fault; the hood has a function of preventing sunlight from directly irradiating the fan, improves the working environment of the wheel hub, a speed reducer and the like in the fan, and prolongs the service life of the fan product.
Description
Technical field
The present invention relates to a kind of blast cap of blower fan of cooling tower, refer in particular to a kind of flexible blast cap of blower fan.
Background technique
The effect of blast cap in blower fan is to stop return air, improves fan efficiency.
When impeller rotates because blade outer place linear velocity is far longer than the linear velocity of impeller rotating center; So just cause the inconsistent situation of whole fan pressure; Though taked the change leaf structure in the design process of blade, methods such as increase torsional angle are improved this situation, can not avoid the generation of this situation. impeller outer is maximum along locating the flow blast; More little the closer to impeller rotating center flow blast; Even be zero, blast high when blower fan turns round flows to low blast place, causes impeller center return air.Reduced fan efficiency.
Generally after blower fan was in place, blast cap is sticking to be contained in the impeller center, when perhaps safety cage being arranged, is mounted on the guard center, works the effect of keeping out the wind, and stoped to form the return air path.
The blast cap that uses at present is solid shape; Make manufacturing, transportation, the regular maintenance of blower fan product increase difficulty; Especially the problem in the regular maintenance, rotating object is generally semimonthly and safeguards in scheduled time; Need to confirm the tightening state of bolt, because the existence of blast cap makes troubles for this housekeeping operation with torque spanner.Some user blast cap of having dismantled without authorization reduces fan efficiency, wastes energy.
The size of existing blast cap also can't be regulated, and improper use also can cause serious equipment failures such as damaged blade and transmission shaft.When also some user uses the blower fan that blast cap is arranged to find that in cooling procedure cooling effect is not good; Strengthen the established angle of blade without authorization, cause with original blower fan operating parameters not to be inconsistent, make blower fan fail to be in preferable working state; Can cause the blower fan overload simultaneously; Motor tripping operation, reducer gear damages, and shortens serious adverse consequencess such as blade working life.
Summary of the invention
The objective of the invention is in order to solve the problem that existing technology exists; A kind of flexible blast cap of blower fan is provided, can suitably increases and decreases size according to using effect, manufacturing, transportation, regular maintenance are conveniently; And have low cost of manufacture, install convenient and prolong the blower fan product function in working life.
The objective of the invention is to realize through following technological scheme:
A kind of flexible blast cap of blower fan comprises in the air duct of said blower fan: the wheel hub that places air duct central authorities; Be fixed in several the identical blades on the wheel hub, several blades and wheel hub are formed impeller, it is characterized in that:
It is central that said flexible blast cap adheres to said impeller;
Said flexible blast cap is by having the rounded face that the sun-proof anti-broken single face light reflecting membrane flexible material sewing of leakproof is processed, and its blast cap diameter d is less than said impeller diameter D;
The edge of said flexible blast cap is sewed into bilateral, in bilateral, is lined with wire.
Said thin film flexible material is a mylar.
Sewing place of said flexible blast cap has bound edge.
The relation of said blast cap diameter d and impeller diameter D is: d=0.25D～0.3D.
The leaf position of said flexible blast cap respective impeller also is sewed with several nylon bands, and nylon band and blower fan petiole are fastening.
Beneficial effect of the present invention:
Flexible blast cap employing of the present invention has the sun-proof anti-broken single face light reflecting membrane flexible material of leakproof processes, and also can make different size (its diameter generally is about the 0.25-0.3 of impeller diameter) as required.This flexible blast cap has low cost of manufacture, and it is convenient that transportation is installed, and also can not cause equipment failure even break down; This blast cap also can play the function that prevents sunlight direct irradiation blower fan, has improved the working environment of wheel hub, retarder etc. in the blower fan, has prolonged blower fan product working life.
For further specifying above-mentioned purpose of the present invention, structural feature and effect, below will combine accompanying drawing that the present invention is elaborated.
Description of drawings
Fig. 1 is the air duct structural representation that has the blower fan of blast cap of the present invention;
Fig. 2 wind flow distribution curve schematic representation relatively in the air duct when blast cap of the present invention being installed and blast cap of the present invention is not installed;
Fig. 3 is the interior blast cap flow model figure of air duct among Fig. 1;
Fig. 4 is the flexible cap structure schematic representation of blower fan of the present invention.
Embodiment
Accompanying drawing specific embodiments of the invention below in conjunction with embodiment is elaborated.
Referring to Fig. 1, have in the air duct 11 of blower fan of blast cap of the present invention and comprise: the wheel hub 14 that places air duct central authorities; Be fixed in several the identical blades 13 on the wheel hub 14, several blades 13 are formed impeller with wheel hub 14; Be fixed in the flexible blast cap 12 of impeller central authorities.Among Fig. 1, the Z in the air duct 11 is the air duct straightway, and K is the air duct diffuser, and R is the air duct entrance.
Referring to Fig. 2, the wind flow distribution curve relatively can provide the effect of using blast cap of the present invention when blast cap of the present invention being installed in the air duct and blast cap of the present invention not being installed, and therefrom can find out there is, do not have the performance difference that flexible blast cap (barge board) causes.Curve " A " is extruding aluminium alloy linear blade wind flow distribution curve in the air duct when not having blast cap, and curve " B " is a wind flow distribution curve in the air duct when the fiberglass blade that reverses being arranged and blast cap being arranged.Two all is that impeller diameter D is 6.1 meters a blower fan, wind flow distribution curve in the air duct that under same load, power and rotating speed, obtains.Abscissa refers in the air duct a bit to relative distance of air duct wall among Fig. 2, is worth pointing out that the straight line type blade does not have blast cap and locates to produce minus flow at 40% (in the curve " A "), and what the fiberglass blade that reverses is arranged and blast cap arranged does not then have a minus flow (in the curve " B ")." blast cap edge " refers to blast cap maximum diameter place among Fig. 2, " wheel hub rim " finger wheel hub maximum diameter place.
Fig. 3 is blast cap flow model figure (impeller diameter D=6.1 rice) in the air duct; It provides the situation of using the zone of silence E that blast cap of the present invention blocks, can find out the zone of silence that blast cap blocks out; Form a fusiform ellipse; Its major axis approximates the diameter of air duct, and (between air duct diameter and impeller diameter certain clearance is arranged, generally be: the impeller diameter of 20mm≤gap≤0.005 times), minor axis is exactly the diameter of blast cap.Self-evident, blast cap to be installed can be prevented backflow, the ratio of the diameter of blast cap and impeller diameter is 0.25-0.3 normally.
Referring to Fig. 4, the employing of this blast cap material has sun-proof anti-broken single face light reflecting membrane flexible material (like the mylar) sewing of leakproof processes, and it has long service life, lightweight characteristics, even come off, can be to transmission shaft yet, and parts such as blade cause damage; Sewing place of blast cap is made bound edge and is handled (having bound edge), uses fastness to increase it.
As shown in Figure 4, this blast cap 40 is rounded face, and it is fixed in impeller central authorities, and the blast cap diameter d generally selects d=0.25D～0.3D to be advisable less than impeller diameter D; The number of blade according to impeller is made several nylon bands 43 in the blast cap relevant position; It is bilateral 41 that sew at the edge of blast cap 40, in bilateral 41, is lined with wire 42, with smooth blast cap 40.
During installation; The flexible blast cap of making is fixed on the draught fan impeller middle position of installation in position; The elder generation at the smooth place of blast cap evens up the blast cap periphery with glue and firmly gets final product with the blade bonding with nylon band and blower fan petiole fastening (as have any problem and just cancel this step).This blast cap has low cost of manufacture, and it is convenient that transportation is installed, and few the maintenance can not caused equipment failure even break down yet; Can suitably increase and decrease size according to using effect, can make the blast cap of 0.28 times of diameter more earlier according to 0.25 times of making blast cap of rotor diameter ...,, up to selected preferable blast cap diameter dimension; Also can play preventing sunlight direct irradiation blower fan, improve the working environment of wheel hub, retarder etc., prolong the function of blower fan life of product
Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the object of the invention; And be not with opposing qualification of the present invention; As long as in essential scope of the present invention, all will drop in the scope of claim of the present invention the above embodiment's variation, modification.
Claims (5)
1. the flexible blast cap of a blower fan comprises in the air duct of said blower fan: the wheel hub that places air duct central authorities; Be fixed in several the identical blades on the wheel hub, several blades and wheel hub are formed impeller, it is characterized in that:
It is central that said flexible blast cap adheres to said impeller;
Said flexible blast cap is by having the rounded face that the sun-proof anti-broken single face light reflecting membrane flexible material sewing of leakproof is processed, and its blast cap diameter d is less than said impeller diameter D;
The edge of said flexible blast cap is sewed into bilateral, in bilateral, is lined with wire.
2. the flexible blast cap of blower fan as claimed in claim 1 is characterized in that:
Said thin film flexible material is a mylar.
3. the flexible blast cap of blower fan as claimed in claim 1 is characterized in that:
Sewing place of said flexible blast cap has bound edge.
4. the flexible blast cap of blower fan as claimed in claim 1 is characterized in that:
The relation of said blast cap diameter d and impeller diameter D is: d=0.25D～0.3D.
5. the flexible blast cap of blower fan as claimed in claim 1 is characterized in that:
The leaf position of said flexible blast cap respective impeller also is sewed with several nylon bands, and nylon band and blower fan petiole are fastening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210096433.2A CN102588343B (en) | 2012-04-01 | 2012-04-01 | A kind of flexible hood of blower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210096433.2A CN102588343B (en) | 2012-04-01 | 2012-04-01 | A kind of flexible hood of blower fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102588343A true CN102588343A (en) | 2012-07-18 |
| CN102588343B CN102588343B (en) | 2016-02-24 |
Family
ID=46477443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210096433.2A Active CN102588343B (en) | 2012-04-01 | 2012-04-01 | A kind of flexible hood of blower fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102588343B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2051686U (en) * | 1989-08-15 | 1990-01-24 | 周心贤 | High efficiency, low pressure axial flow ventilator |
| CN2317268Y (en) * | 1997-11-24 | 1999-05-05 | 浙江上风实业股份有限公司 | Axial flow roof ventilator |
| US20050056042A1 (en) * | 2003-09-12 | 2005-03-17 | Davis Energy Group, Inc. | Hydronic rooftop cooling systems |
| JP2009168267A (en) * | 2008-01-11 | 2009-07-30 | Kuken Kogyo Co Ltd | Blower for cooling tower |
| CN201461512U (en) * | 2009-06-11 | 2010-05-12 | 浙江双阳风机有限公司 | Opening mechanism for wind cap of roof fan |
| CN202628613U (en) * | 2012-04-01 | 2012-12-26 | 上海尔华杰机电装备制造有限公司 | Flexible fan cap of draught fan |
-
2012
- 2012-04-01 CN CN201210096433.2A patent/CN102588343B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2051686U (en) * | 1989-08-15 | 1990-01-24 | 周心贤 | High efficiency, low pressure axial flow ventilator |
| CN2317268Y (en) * | 1997-11-24 | 1999-05-05 | 浙江上风实业股份有限公司 | Axial flow roof ventilator |
| US20050056042A1 (en) * | 2003-09-12 | 2005-03-17 | Davis Energy Group, Inc. | Hydronic rooftop cooling systems |
| JP2009168267A (en) * | 2008-01-11 | 2009-07-30 | Kuken Kogyo Co Ltd | Blower for cooling tower |
| CN201461512U (en) * | 2009-06-11 | 2010-05-12 | 浙江双阳风机有限公司 | Opening mechanism for wind cap of roof fan |
| CN202628613U (en) * | 2012-04-01 | 2012-12-26 | 上海尔华杰机电装备制造有限公司 | Flexible fan cap of draught fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102588343B (en) | 2016-02-24 |
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