CN204312401U - One subtracts surge low-noise fan - Google Patents
One subtracts surge low-noise fan Download PDFInfo
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- CN204312401U CN204312401U CN201420657572.2U CN201420657572U CN204312401U CN 204312401 U CN204312401 U CN 204312401U CN 201420657572 U CN201420657572 U CN 201420657572U CN 204312401 U CN204312401 U CN 204312401U
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- wheel hub
- wind scooper
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Abstract
The utility model discloses one and subtract surge low-noise fan, comprise impeller and impeller fixed tray, described impeller comprises some blades and the wheel hub for stator blade, from first edge to the thickness of trailing edge not etc., described blade comprises and takes shape in ten the tooth blocks of six to two on trailing edge and to take shape on external diameter and to protrude from the fairshaped projection on blade two sides described blade; Described blade also comprises the installation shaft for being connected with wheel hub, described installation shaft forms circular flange; Described wheel hub is connected and composed by two wheel hub plate and on the junction surface of two wheel hub plate, is provided with the mounting groove for fixedly mounting axle and the flange groove for holding flange; The air port of described impeller fixed tray central authorities protrudes from impeller fixed tray two sides and forms wind scooper, and the edge of described wind scooper intake grill side is toward flanging and described impeller entirety is positioned at wind scooper.
Description
Technical field
The utility model relates to blower fan technical field, particularly relates to one and subtracts surge low-noise fan.
Background technique
Current domestic high ferro and the tunnel of subway generally adopt blower fan to ventilate, axial-flow blower operationally can cause gas backstreaming to make blower fan produce vibration due to air port underpressure or strong pressure difference, the surging phenomenon of Here it is blower fan, blower fan produces surging phenomenon for a long time can the ventilation duct that is even connected with blower fan of badly damaged blower fan.Especially be arranged on high ferro, motor-car, the blower fan in subway and subway tunnel, can produce air pressure official post air port pressure moment sharply declines when train crosses tunnel, namely produces powerful pressure difference, thus causes violent surging phenomenon; Although bullet train keeps the air pressure in car by the intelligent piston in compartment, but because the speed of high ferro train is relatively high, air-flow around train can be run at high speed due to train and be become stable not, train is taken a breath by air-conditioning draught fan and is blown, so require that blower fan has enough performance opposings, prevent and improve the surge because pressure difference produces, being especially arranged on blower fan in tunnel and allowing replacement and maintenance work become difficulty.
The structure shape of fan blade and its established angle all can affect intensity and the cycle of blower fan surge.Disclosed in Chinese patent 2013-09-11, publication number is that the model utility of CN 103291658A discloses a kind of draught fan impeller, this impeller is to the adjustment of the shape of blade, established angle, radius of curvature and blade chord length and blade height ratio, stop the backflow of root of blade air-flow, avoid the generation of impeller surging phenomenon.
Prevent the generation of surge not only relevant to the blade wheel structure of blower fan, for an overall blower fan, it is also the important measures preventing surge that well-formed between each parts coordinates, and prevents the blower fan structure of surge all can be different in addition in different operating environments.
Summary of the invention
The purpose of this utility model is just to provide the one that effectively can prevent surge and reduce noise in various working environments to subtract surge low-noise fan to above problem.
In order to realize above effect, the technical solution adopted in the utility model is: one subtracts surge low-noise fan, comprise impeller and impeller fixed tray, described impeller comprises some blades and the wheel hub for stator blade, from first edge to the thickness of trailing edge not etc., described blade comprises and takes shape in ten the tooth blocks of six to two on trailing edge and to take shape on external diameter and to protrude from the fairshaped projection on blade two sides described blade; Described blade also comprises the installation shaft for being connected with wheel hub, described installation shaft forms circular flange; Described wheel hub is connected and composed by two wheel hub plate and on the junction surface of two wheel hub plate, is provided with the mounting groove for fixedly mounting axle and the flange groove for holding flange; The air port of described impeller fixed tray central authorities protrudes from impeller fixed tray two sides and forms wind scooper, and the edge of described wind scooper intake grill side is toward flanging and described impeller entirety is positioned at wind scooper.
Further, the tooth root degree of depth of described tooth block is successively decreased from outside to inside successively.
Further, described two wheel hub plate are bolted.
Further, the inside radius of described wind scooper and the radius of impeller consistent.
Further, the main outline of described blade is for be made up of 16 three-dimensional curves, and wherein every bar curve is formed by connecting by 32 three-dimensional coordinate points, totally five hundred one ten two three-dimensional coordinate points.
Further, the thickness of described blade successively decreases from first edge gradually to trailing edge.
The beneficial effects of the utility model are: blades installation angle of the present utility model is adjustable, can regulate according to the setting angle of the working environment of reality to blade, can work and make the impact of surge reduce to minimum under the setting angle of the best.Projection on outer blade diameter can stop fraction to flow away and improve the pressure of blower fan in footpath outward, contributes to preventing blower fan surge; Tooth block on blade trailing edge can reduce the turbulence intensity on trailing edge, thus reduces noise.How setting angle regardless of blade regulates, impeller all can be positioned at wind scooper completely, the pressure of blower fan at air port place can be increased further, reduce the loss of air quantity and blast, improve blower fan usefulness, wind scooper can also play guide functions and air-flow entered along the edge of wind scooper intake grill side in wind scooper and is sent to exhaust outlet side by impeller.
The shape of the projection on outer blade diameter adopts the streamlined windage reducing projection generation when blower fan rotates, and reduces the eddy current that blade edge produces when rotating.
Because the turbulence intensity of blade trailing edge overdraught is successively decreased from outside to inside successively, therefore the tooth root degree of depth of its tooth block is also successively decreased from outside to inside successively, can reduce the weight that noise also can reduce impeller.
Two wheel hub plate are bolted the stability that can improve impeller and make the connection between wheel hub and blade more firm.
The inside radius of wind scooper is consistent with the radius of impeller, then only there is trickle space between the external diameter of impeller upper blade and wind scooper inwall, more effectively can improve the pressure of blower fan at air port place, reduce the loss of air quantity and blast, be conducive to directing gas flow, thus also reduce the noise produced because air is not smooth.
Blade is made up of 16 three curves, every bar curve is formed by connecting by three three-dimensional coordinate points, the not uniform thickness design of totally five hundred one ten two three-dimensional coordinate points, this is through computer data simulation repeatedly and object test and draws and the fan blade curved surface blade profile of the not uniform thickness of the final shaping can effectively reduce loss during gas flow.
Accompanying drawing explanation
Fig. 1 is perspective view of the present utility model.
Fig. 2 is side view of the present utility model.
Fig. 3 is the perspective view of the utility model impeller.
Fig. 4 is the exploded view of the utility model impeller.
Fig. 5 is the partial enlarged drawing of region A in Fig. 4.
Fig. 6 is the side view of the utility model blade.
Fig. 7 is the plan view of the utility model blade.
Wherein, 1 is impeller, and 11 is blade, and 111 is tooth block, and 112 is projection, and 113 is installation shaft, and 114 is flange, and 12 is wheel hub, and 121 is wheel hub plate, and 122 is mounting groove, and 123 is flange groove, and 2 is impeller fixed tray, and 21 is wind scooper.
Embodiment
Now with specific embodiment, the utility model technological scheme required for protection is described in further detail by reference to the accompanying drawings.
As depicted in figs. 1 and 2, the blower fan of the present embodiment includes impeller fixed tray 2 and impeller 1, wherein impeller 1 be arranged on motor rotating shaft on and driven by motor, the motor air port aimed on impeller fixed tray 2 carries out being connected with impeller fixed tray 2 and in the wind scooper 21 that the position of impeller 1 is on impeller fixed tray 2.In the present embodiment, blade 11 established angle on impeller 1 can regulate between 20-40 degree, but the entirety of impeller 1 still can be in the air port pressure increasing blower fan in wind scooper 21 completely.Wind scooper 21 is in the edge bending outward of intake grill side, and this structure can contribute to guiding air-flow to enter in wind scooper 21.
As shown in Figure 3, the impeller 1 of the present embodiment is made up of wheel hub 12 and six blades 11 be arranged on wheel hub 12.The quantity of blade 11 can adjust according to the actual requirements, and the numerical value of its reference is 3-9 sheet.
As shown in Figure 4 and Figure 5, wheel hub 12 is bolted by the wheel hub plate 121 that two sizes are identical and forms, the junction surface of two wheel hub plate 121 leaves mounting groove 122 and flange groove 123, when two wheel hub plate 121 merge mounting groove 122 in latter two wheel hub plate 121 and flange groove 123 also can merge thereupon.
As shown in Figure 6, blade 11 internal diameter of the present embodiment is provided with the installation shaft 113 of band round flange 114, and the effect of installation shaft 113 blade 11 can be installed with wheel hub 12 be connected.When installing, first two wheel hub plate 121 are separated, wherein mounting groove 122 and flange groove 123 are come out, the installation shaft 113 of blade 11 and flange 114 are put into mounting groove 122 with flange groove 123, then two wheel hub plate 121 are merged screwing bolts, mounting groove 122 and flange groove 123 are engaged installation shaft 113 and flange 114 in an interference fit tightly, thus blade 11 to be fixed on wheel hub 12.
As shown in 6 and Fig. 7, the thickness of the blade 11 of the present embodiment is reduced to trailing edge assembly by first edge, constitutes not uniform thickness design.Concrete shape can be described as and is made up of 16 three-dimensional curves, and every bar curve is formed by connecting by three three-dimensional coordinate points, the not uniform thickness design of totally five hundred one ten two three-dimensional coordinate points.The trailing edge of blade 11 forms ten tooth blocks 111, and these ten tooth blocks 111 are arranged on trailing edge and the degree of depth of its tooth root is successively decreased from outside to inside successively, and wherein said inward-outward direction refers to the internal diameter side of blade 11 and the direction of external diameter side.The external diameter of blade 11 forms projection 112, projection 112 in the present embodiment protrudes from the two sides of blade 11 along external diameter, and the shape of projection 112 is streamlined, effectively can reduces the windage produced by projection 112 when blower fan rotates, reducing the eddy current that fan blade edge produces when rotating.
The blower fan of the present embodiment in use, technician can first according to the established angle of the job requirement adjusting vane 11 of reality, its foundation is for when the flow that ventilation system needs or pressure reduce, then reduce the established angle of blade 11, by controlling flow thus the intensity of attenuating surge, blade 11 established angle of the present embodiment can regulate between 20-40 degree.
When after fan starting, the air-flow near its suction port can be guided to enter in wind scooper 21 by wind scooper 21 and meet with impeller 1.Tooth block 111 on blade 11 trailing edge can be divided into some little whirlpools the strong concentrated vorticity that trailing edge border is formed thus reduce boundary layer turbulence intensity, reduces the noise of blower fan.Loss when the not uniform thickness design of blade 11 improves gas flow, improves the usefulness of blower fan entirety.And the projection 112 on blade 11 external diameter can flow out thus make blower fan have higher pressure by stop portions air-flow on the external diameter direction of blade 11, and the eddy current of fan blade edge generation when rotating can be reduced.The air port size of wind scooper 21 is consistent with impeller 1 in the present embodiment, increases the pressure at air port place.
The examples of implementation of the above are only the preferred embodiment of the utility model, not limit practical range of the present utility model with this, therefore the change that all shapes according to the utility model, principle are done, all should be encompassed in protection domain of the present utility model.
Claims (6)
1. subtract a surge low-noise fan, comprise impeller (1) and impeller fixed tray (2), it is characterized in that; Described impeller (1) comprises some blades (11) and the wheel hub (12) for stator blade (11), from first edge to the thickness of trailing edge not etc., described blade (11) comprises and takes shape in ten the tooth blocks (111) of six to two on trailing edge and to take shape on external diameter and to protrude from the fairshaped projection (112) on blade (11) two sides described blade (11); Described blade (11) also comprises the installation shaft (113) for being connected with wheel hub (12), described installation shaft (113) forms circular flange (114); Described wheel hub (12) is connected and composed by two wheel hub plate (121) and the mounting groove (122) be provided with on the junction surface of two wheel hub plate (121) for fixedly mounting axle (113) and the flange groove (123) for holding flange (114); The air port of described impeller fixed tray (2) central authorities protrudes from impeller fixed tray (2) two sides and forms wind scooper (21), and the edge of described wind scooper (21) intake grill side is toward flanging and described impeller (1) entirety is positioned at wind scooper (21).
2. one according to claim 1 subtracts surge low-noise fan, it is characterized in that; The tooth root degree of depth of described tooth block (111) is successively decreased from outside to inside successively.
3. one according to claim 1 subtracts surge low-noise fan, it is characterized in that; Described two wheel hub plate (121) are bolted.
4. one according to claim 1 subtracts surge low-noise fan, it is characterized in that; The inside radius of described wind scooper (21) is consistent with the radius of impeller (1).
5. one according to claim 1 subtracts surge low-noise fan, it is characterized in that; The main outline of described blade (11) is made up of 16 three-dimensional curves, and wherein every bar curve is formed by connecting by 32 three-dimensional coordinate points, totally five hundred one ten two three-dimensional coordinate points.
6. one according to claim 1 subtracts surge low-noise fan, it is characterized in that; The thickness of described blade (11) successively decreases from first edge gradually to trailing edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420657572.2U CN204312401U (en) | 2014-11-05 | 2014-11-05 | One subtracts surge low-noise fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420657572.2U CN204312401U (en) | 2014-11-05 | 2014-11-05 | One subtracts surge low-noise fan |
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| Publication Number | Publication Date |
|---|---|
| CN204312401U true CN204312401U (en) | 2015-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420657572.2U Active CN204312401U (en) | 2014-11-05 | 2014-11-05 | One subtracts surge low-noise fan |
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| CN (1) | CN204312401U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389818A (en) * | 2014-11-05 | 2015-03-04 | 广东佳科风机股份有限公司 | Surging reduction low-noise fan |
| USD901669S1 (en) | 2017-09-29 | 2020-11-10 | Carrier Corporation | Contoured fan blade |
-
2014
- 2014-11-05 CN CN201420657572.2U patent/CN204312401U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389818A (en) * | 2014-11-05 | 2015-03-04 | 广东佳科风机股份有限公司 | Surging reduction low-noise fan |
| USD901669S1 (en) | 2017-09-29 | 2020-11-10 | Carrier Corporation | Contoured fan blade |
| USD916269S1 (en) | 2017-09-29 | 2021-04-13 | Carrier Corporation | Compressor fan having a contoured fan blade |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |