CN103912509A - Meridionally-accelerated mixed-flow fan - Google Patents
Meridionally-accelerated mixed-flow fan Download PDFInfo
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- CN103912509A CN103912509A CN201310002949.0A CN201310002949A CN103912509A CN 103912509 A CN103912509 A CN 103912509A CN 201310002949 A CN201310002949 A CN 201310002949A CN 103912509 A CN103912509 A CN 103912509A
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- blower fan
- blade
- interior hub
- mixing blower
- flow
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Abstract
The invention provides a meridionally-accelerated mixed-flow fan. The meridionally-accelerated mixed-flow fan comprises a fan cylinder, and a plurality of blades arranged in the fan cylinder, wherein each of the blades is a twisted blade with a meridional acceleration, and the plurality of blades are uniformly distributed and fixedly connected with an inner wheel shell. The mixed-flow fan provided by the invention is compact in structure, small in size and light in weight; compared with a centrifugal ventilator, the mixed-flow fan is space-saving and convenient to install; when five working condition air volumes specified by a sample are met, the measured total pressure average value of the fan achieves 101.22% of a sample value.
Description
Technical field
The present invention relates to a kind of flow-mixing blower fan, particularly a kind of meridian acceleration flow-mixing blower fan.
Background technique
Current domestic flow-mixing blower fan mostly is mixed-flow low noise, has the feature of energy-saving ventilating air, is a kind of novel fan between axial flow and centrifugal fan.This blower fan can be widely used in industry, the ventilation that civilian and public building is indoor.But the fan performance of producing due to each manufacturer differs, (performance selects table to refer to the performance under standard state, fan performance can be selected on table and consult in performance), the blower press mean value recording by 5 applying working condition air quantity of sample regulation and total head, with sample gap (blower fan acceptable product performance total head value under rated flow of preferably dispatching from the factory be no more than ± 5%) too far away.What actual measured value was best reaches 81.46% of sample value, and next is respectively 75.04%, 70.88%, and 46.86%, 34.52%.Therefore in use, when the pressure of existing blower fan is during lower than sample force value, be difficult to overcome pipe-line system resistance and can only reduce air quantity, the lower air quantity of pressure is less, so fan performance is poor.
Summary of the invention
The technical problem to be solved in the present invention is the defect in order to overcome prior art, and a kind of meridian acceleration flow-mixing blower fan is provided, and this flow-mixing blower fan has real meridian acceleration performance.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of meridian acceleration flow-mixing blower fan, it comprises: a blower fan cylindrical shell, one is sheathed on the some blades in described blower fan cylindrical shell, its feature is, each described blade is a twisted blade with meridian acceleration degree, some described blades and an interior hub uniform affixed (referring to be arranged on equably on interior hub).
Meridian acceleration is the technical term of related domain, as also having specifically and tell about in business Jingtai chief editor's ventilator handbook: the sectional area of meridian acceleration axial-flow fan blade runner reduces gradually, and air-flow is after blade, and its meridian speed is increased.When use, by electric motor starting blade, under the acting in conjunction of several blades with meridian acceleration feature, in the flow process of whole gas, obtain the appreciation of pressure, thereby under the prerequisite that meets air quantity, increase the pressure of blower fan, and improved total pressure efficiency and the static pressure efficiency of blower fan.
Preferably, described twisted blade is formed by an arc surface and Plane intersects, taking the lower extreme point above of described twisted blade and the upper extreme point below of this twisted blade as boundary line, is this arc surface of bending on described boundary line, is this plane under described boundary line.So just can form two kinds of different angles (two kinds of different amount here refer to He Shao angle, root angle as described below), can make air-flow enter fast the wind collecting unit of tool noise elimination function, and accelerate to enter in the runner of blade.
Preferably, a side of described interior hub connects in aggregates with the wind collecting unit of a tool silencing function, and the opposite side of described interior hub is connected with a motor.
Preferably, described interior hub be shaped as a cone barrel type, the tapering of the root of this blade is identical with interior hub tapering.Adopt taper shape, can accelerate flowing of air-flow.
Preferably, the afterbody of described interior hub is affixed by a reel fixed plate and a reel, and described reel is connected with this electric machine rotation.
Preferably, an also affixed fluid dividing cover of the end of described interior hub.
Preferably, described interior hub is connected by hexagon head tapping screw with this fluid dividing cover.
Preferably, the root of described blade forms respectively different He Shao angles, root angle from the top of blade, and this root angle is between 50 degree ~ 58 degree; The ratio at this Yu Gaigen angle, tip angle, for being greater than 0, is less than 0.8.
Preferably, the ratio at this Yu Gaigen angle, tip angle is 0.74.After tested, can be also 0.74 left and right size.Under this kind of angle ratio, blade has preferably compressor flow and pressure, and energy-saving effect is obvious.
Preferably, the quantity of described blade is 8.In order to accelerate the flow velocity of air-flow in blade and blade road, blade quantity should not lack, and length of blade is unsuitable short, so the quantity of blade is 8.
Positive progressive effect of the present invention is: the present invention can realize real meridian acceleration, and air-flow is after blade, and the meridian speed of blower fan is just increased.Flow-mixing blower fan of the present invention, compact structure, volume is little, lightweight.Compared with centrifugal blower, save space, easy for installation.This blower fan is in the time meeting 5 operating mode air quantity of sample regulation, and the blower press mean value recording reaches 101.22% of sample value.In addition, flow-mixing blower fan of the present invention, can conveniently be made into again the fire control smoke exhausting flow-mixing blower fan that can run well 45 minutes under the ambient temperature of 300 degree left and right.
Brief description of the drawings
Fig. 1 is the structural drawing of the flow-mixing blower fan of one embodiment of the invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is fluid dividing cover in Fig. 1 and the erection drawing of blade.
Fig. 4 is the structural drawing of the blade in Fig. 1.
Fig. 5 is the plane outspread drawing of the blade in Fig. 4.
Fig. 6 is the blade shaping figure along A in Fig. 5 to arrow.
Embodiment
Lift a preferred embodiment below, and carry out by reference to the accompanying drawings the clearer the present invention that intactly illustrates.
Embodiment
Namely flow-mixing blower fan of meridian acceleration axial-flow blower, this blower fan is exactly the combination of centrifugal blower and axial-flow blower, therefore be designed to this blower fan by this principle, the particularly design to blade:
Referring to shown in Fig. 1 to Fig. 6, the flow-mixing blower fan in the present invention is mainly made up of parts such as fluid dividing cover 12, interior hub 2, eight blades 3, reel fixed plate 6, reels 11, the wind collecting unit 1 that is positioned at inlet and the motor cylindrical shell 4, motor 5, blower fan cylindrical shell 7, outer hub 8 that are positioned at outlet port and suspension ring 9, bases 10.8 air-foil blades 3 with the distortion of meridian acceleration feature are welded on interior hub 2.The tapering of the root of this blade 3 is identical with the tapering of interior hub 2.
In order to accelerate the flow velocity of air-flow in blade and blade road, blade quantity should not lack, and length of blade is unsuitable short, so the quantity of blade is eight.Interior hub 2 adopts cone barrel type, and to connect shape in aggregates with the wind collecting unit 1 of tool silencing function.Through dynamic balancing inspection and overspeed test, adopt the flow-mixing blower fan of blade of the present invention to there is good aerodynamic quality.
Eight blades 3 and uniform being welded to connect of interior hub 2, interior hub 2 is welded to connect with reel fixed plate 6, and reel 11 is connected with reel fixed plate 6 use standard piece, and fluid dividing cover 12 is connected with interior hub 2 use hexagon head tapping screws (GB5285-85).
Guide plate 13(is also equipped with as shown in Figure 1 in the outlet port of blower fan), the air-flow that tool is good like this distributes, and pressure stability.
Be shaped and scheme with the blade of Plane intersects referring to arc surface bending (radius R) in the blade plane unfolded drawing in Fig. 5 and Fig. 6, taking the upper extreme point after blade 3 lower extreme point and blade above as boundary line 33, on boundary line 33, be arc surface 31 bendings, it under boundary line 33, is plane 32, formation twisted blade 3 is intersected on two sides, therefore forms two kinds of different amount at the root of blade and the top of blade: root angle a and tip angle b.In addition, also form a twist angle c when arc surface distortion of blade.Find after tested, when root angle a gets the angle value between 50 degree ~ 58 degree, and the ratio of this tip angle b and this root angle a is in the time of 0.74 left and right, and flow-mixing blower fan has higher energy-saving effect.Because of two kinds of different amount (height of root angle a, tip angle size decision air intake pressure b) of blade 3.The tapering of root of blade is identical with the tapering of interior hub, and the taper design of interior hub must be rationally.
When use, by electric motor starting blade rotation, formed in the runner of two kinds of different amount (under the acting in conjunction of root angle a, tip angle eight blades b), then by blade passage, entering fast nine uniform guide plate 13(as shown in Figure 1) by the bending distortion crossing with plane 32 of arc surface 31.In the flow process of whole gas, obtain the appreciation of pressure, thereby under the prerequisite that meets air quantity, increased the pressure of blower fan, and improved total pressure efficiency and the static pressure efficiency of blower fan.
Compared with prior art, the invention has the beneficial effects as follows:
Flow-mixing blower fan of the present invention, compact structure, volume is little, lightweight.Compared with centrifugal blower, save space, easy for installation.In the time meeting 5 operating mode air quantity of sample regulation, the blower press mean value recording reaches 101.22% of sample value.
In addition, flow-mixing blower fan of the present invention, can conveniently be made into again the fire control smoke exhausting flow-mixing blower fan that can run well 45 minutes under the ambient temperature of 300 degree left and right.
Although more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present invention and essence, can make various changes or modifications to these mode of executions, but these changes and amendment all fall into protection scope of the present invention.
Claims (10)
1. a meridian acceleration flow-mixing blower fan, it comprises: a blower fan cylindrical shell, one is sheathed on the some blades in described blower fan cylindrical shell, it is characterized in that, and each described blade is a twisted blade with meridian acceleration degree, and some described blades and an interior hub are uniform affixed.
2. meridian acceleration flow-mixing blower fan as claimed in claim 1, it is characterized in that, described twisted blade is formed by an arc surface and Plane intersects, taking the upper extreme point after the lower extreme point above of described twisted blade and this twisted blade as boundary line, on described boundary line, being this bending arc surface, is this plane under described boundary line.
3. meridian acceleration flow-mixing blower fan as claimed in claim 1, is characterized in that, a side of described interior hub connects in aggregates with the wind collecting unit of a tool silencing function, and the opposite side of described interior hub is connected with a motor.
4. meridian acceleration flow-mixing blower fan as claimed in claim 3, is characterized in that, described interior hub be shaped as a cone barrel type, the tapering of the root of this blade is identical with interior hub tapering.
5. meridian acceleration flow-mixing blower fan as claimed in claim 4, is characterized in that, the afterbody of described interior hub is affixed by a reel fixed plate and a reel, and described reel is connected with this electric machine rotation.
6. meridian acceleration flow-mixing blower fan as claimed in claim 1, is characterized in that, the end of described interior hub is an affixed fluid dividing cover also.
7. meridian acceleration flow-mixing blower fan as claimed in claim 6, is characterized in that, described interior hub is connected by hexagon head tapping screw with this fluid dividing cover.
8. meridian acceleration flow-mixing blower fan as claimed in claim 1, is characterized in that, the root of described blade forms respectively different He Shao angles, root angle from the top of blade, and this root angle is between 50 degree ~ 58 degree; The ratio at this Yu Gaigen angle, tip angle, for being greater than 0, is less than 0.8.
9. meridian acceleration flow-mixing blower fan as claimed in claim 8, is characterized in that, the ratio at this Yu Gaigen angle, tip angle is 0.74.
10. meridian acceleration flow-mixing blower fan as in one of claimed in any of claims 1 to 9, is characterized in that, the quantity of described blade is 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310002949.0A CN103912509A (en) | 2013-01-05 | 2013-01-05 | Meridionally-accelerated mixed-flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310002949.0A CN103912509A (en) | 2013-01-05 | 2013-01-05 | Meridionally-accelerated mixed-flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103912509A true CN103912509A (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310002949.0A Pending CN103912509A (en) | 2013-01-05 | 2013-01-05 | Meridionally-accelerated mixed-flow fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963461A (en) * | 2020-08-12 | 2020-11-20 | 西安陕鼓动力股份有限公司 | Novel disrotatory fan |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2262619Y (en) * | 1995-08-16 | 1997-09-17 | 南通市净海暖通设备厂 | Mixed flow ventilator |
| CN2592920Y (en) * | 2002-12-31 | 2003-12-17 | 上海世揆空调风机有限公司 | Low-noise centrifugal fan for roofing |
| CN2592918Y (en) * | 2002-12-31 | 2003-12-17 | 上海世揆空调风机有限公司 | Mixed-flow smoke-discharge fan for fire control |
| JP2004092498A (en) * | 2002-08-30 | 2004-03-25 | Mitsubishi Heavy Ind Ltd | Diagonal flow turbine and diagonal flow moving blade |
| CN203146366U (en) * | 2013-01-05 | 2013-08-21 | 上海涌华通风设备有限公司 | Radial-acceleration mixed-flow fan |
-
2013
- 2013-01-05 CN CN201310002949.0A patent/CN103912509A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2262619Y (en) * | 1995-08-16 | 1997-09-17 | 南通市净海暖通设备厂 | Mixed flow ventilator |
| JP2004092498A (en) * | 2002-08-30 | 2004-03-25 | Mitsubishi Heavy Ind Ltd | Diagonal flow turbine and diagonal flow moving blade |
| CN2592920Y (en) * | 2002-12-31 | 2003-12-17 | 上海世揆空调风机有限公司 | Low-noise centrifugal fan for roofing |
| CN2592918Y (en) * | 2002-12-31 | 2003-12-17 | 上海世揆空调风机有限公司 | Mixed-flow smoke-discharge fan for fire control |
| CN203146366U (en) * | 2013-01-05 | 2013-08-21 | 上海涌华通风设备有限公司 | Radial-acceleration mixed-flow fan |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963461A (en) * | 2020-08-12 | 2020-11-20 | 西安陕鼓动力股份有限公司 | Novel disrotatory fan |
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Application publication date: 20140709 |