CN1908444A - Axial type energy-saving fan blade for extrusion and cutting process - Google Patents

Axial type energy-saving fan blade for extrusion and cutting process Download PDF

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Publication number
CN1908444A
CN1908444A CN 200610030338 CN200610030338A CN1908444A CN 1908444 A CN1908444 A CN 1908444A CN 200610030338 CN200610030338 CN 200610030338 CN 200610030338 A CN200610030338 A CN 200610030338A CN 1908444 A CN1908444 A CN 1908444A
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blade
main body
fan blade
cutting process
axial
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CN 200610030338
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CN100595439C (en
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任世瑶
徐开元
谭正明
张焕武
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Shanghai Jiao Tong University
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Shanghai Jiao Tong University
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Abstract

The invention relates to an axial flow energy-saving fan blade shaped by compression method, which is formed by hollow wing main body and solid tail edge, wherein the blade handle is inserted into the arc base of main chamber of wing to be fixed with the wing main body; another end of blade handle is fixed on the hub of blade wheel; the inner radius of blade is mounted with sealing plate, while the outer radius is mounted with end cover plate; the end cover plate has several water outlets; according to the size of the arc length of blade, several strengthen bars are arranged inside the chamber of main body to improve the blade rigidity; based on large fan, the main body can use segmented structure, while the segments are coupled by wedge grooves, without integrated mould and large compressor, to reduce the cost.

Description

The axial type energy-saving fan blade of extrusion and cutting process
Technical field
The present invention relates to a kind of axial type energy-saving fan blade, relate in particular to a kind of axial type energy-saving fan blade of extrusion and cutting process, can be used for the axial-flow blower of all size, significantly reduce production costs under the prerequisite of higher operational efficiency guaranteeing.Belong to the fluid engineering technical field.
Background technique
In numerous air-cooled heat transmission equipments and ring control ventilation system, extensively adopt the wing blade axial fan, its impeller diameter is big surpasses 10M, little blower fan diameter is 40mm only, single-machine capacity is little of several watts, big find through generaI investigation, exist that operational efficiency is low, big energy-consuming, energy waste is serious, noise is high drawback to hundreds of kilowatt.
Current energy scarcity, externally interdependency improves gradually, and for realizing the target of the ten thousand yuan of GDP energy consumptions declines 20% in Tenth Five-Year Plan Period Shanghai City, it is very urgent therefore to work out the energy-saving and cost-reducing plan of axial-flow blower.
In order to improve the economical operation of axial-flow blower, normally start with from following two aspects:
1. start with from the optimization of flow pattern, improve the high efficiency of fan efficiency;
2. the performance parameter of axial-flow blower should be complementary with system head characteristics, guarantees that blower fan has higher running efficiency.
Common way is, air quantity, wind pressure value by demand design and make separately blade mold one by one, expensive mould expense can cause increasing substantially of manufacture cost, make numerous blower fan factory to small lot, large diameter blower fan project, often be reluctant to accept manufacturing, because deficiency in economic performance causes the energy waste phenomenon to continue to exist.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, propose a kind of axial type energy-saving fan blade of extrusion and cutting process, can not only guarantee fan operation efficient height on structure, energy consumption is little, can also on producing, realize one module multiple usages, significantly reduce fabricating cost.
For realizing this purpose, the axial type energy-saving fan blade of the extrusion and cutting process of the present invention's design divides two sections of front and back, wing blade main body and the back segment solid trailing edge hollow by leading portion constitute, petiole adopts steel pipe manufacturing, in the insertion machine aerofoil profile main body inner chamber in the special arc seat, fastening with screw and wing blade main body, the other end of petiole is fixed on the impeller hub by flange.Shrouding is equipped with at the internal diameter blade place, and outer radius is equipped with end casing, is drilled with several weep holes on the end casing.According to the size of blade chord length, several stiffening ribs parallel with blade centreline are set in wing blade main body hollow lumen, be used for reinforcing and the raising blade stiffness.For larger-diameter blower fan, vane machine aerofoil profile main body can adopt segmentation structure, adopts wedge slot to connect between section and the section, can not need to use unitary mould and large-scale extrusion equipment, the fabricating cost of minimizing mould.
Among the present invention, the design of the molded lines tortuosity of trailing edge will be considered to guarantee to have bigger leaf angle difference DELTA β and bigger ratio of lift coefficient to drag coefficient value.Line (chord length) l of two ends before and after the wing blade main body 0With the double-pointed lines in the front and back of whole blade (chord length) l 1Between the angle Δ β that constitutes be 5～20 degree, l 1 l 0 = 1.3 ~ 1.75 , The molded lines tortuosity radius of curvature R of trailing edge kValue is at l 1Value in the scope of/(0.3～0.9).
When making the different-diameter fan blade, can keep the wing blade main body constant, and press blower fan diameter (impeller diameter) size, intercept blade stock axial length as required, select the number of blade and rotating speed as required for use, and on the blade trailing edge lagging edge, do the different modes cutting and adjust the setting angle of blade on wheel hub, can obtain required flow pattern, make the fan blade aeroperformance satisfy system requirements, realize efficiently operation.The lagging edge mode of cutting off of trailing edge can be divided into Quan Yechang cutting or the cutting of part chord length, and the cutting of these two kinds of forms all can make full use of and guarantee Ye Dingqu capacity for work efficiently.
Shrouding is equipped with at internal diameter blade of the present invention place, has the preformed hole that petiole is installed on the shrouding.End casing is equipped with in blade external diameter end, can be drilled with several little weep holes on end casing, is used in time getting rid of the ponding of blade inner chamber, guarantees the dynamic balance accuracy and the normal operation of blade.
Wing blade axial type energy-saving fan blade structure uniqueness of the present invention can not only guarantee fan operation efficient height, and energy consumption is little, can also on producing, realize one module multiple usages, reduce the manufacturing cost of fan blade significantly, improve efficiency of energy utilization, save energy consumption, have promotional value.
Description of drawings
Fig. 1 is the sectional view of fan blade structure of the present invention.
Among Fig. 1,1 is the wing blade main body, and 2 is trailing edge, and 3 is the arc seat, and 4 is stiffening rib, and 5 is petiole, and 6 is the connection part of segmented blade.
Fig. 2 is the plan view of fan blade structure of the present invention.
Among Fig. 2,3 is the arc seat, and 4 is stiffening rib, and 5 is petiole, and 6 is connection part, and 7 is flange, and 8 is screw, and 10 is the end casing of blade outer radius.
Fig. 3 is the enlarged view of the connection part 6 of segmented blade.
Fig. 4 is the closing plate structure schematic representation at internal diameter blade place.
Among Fig. 4,9 is the shrouding at internal diameter blade place, and 11 for installing the preformed hole of petiole.
Fig. 5 is the end cap structure schematic representation of blade outer radius.
Among Fig. 5,10 is the end casing of blade outer radius, and 12 is weep hole.
Embodiment
Below in conjunction with accompanying drawing technological scheme of the present invention is described in further detail.
Fan blade of the present invention is a wing blade cavity blade, the sectional view of its structure as shown in Figure 1, wing blade main body 1 and the back segment solid trailing edge 2 hollow by leading portion constitute, material adopts aluminum alloy or glass fiber reinforced plastic (FRP) to make.Petiole 5 adopts steel pipe manufacturings, and in the special arc seat 3 in insertion machine aerofoil profile main body 1 inner chamber middle part, fastening with screw and blade, the other end of petiole 5 is fixed on the impeller hub by flange.It is long-pending with the contact surface of petiole 5 that arc seat 3 can increase wing blade main body 1, in order to reducing the juxtaposition metamorphose amount.According to the size of blade chord length, can several stiffening ribs parallel with blade centreline 4 be set in wing blade main body 1 hollow lumen, be used for reinforcing and the raising blade stiffness.For larger-diameter blower fan, vane machine aerofoil profile main body 1 can adopt segmentation structure, and section connects with connection part 6 employing wedge slots between the section.
Among Fig. 1, wing blade main body 1 is the XPY section, is hollow wing blade, and trailing edge 2 is the YQZ section, is solid section, and the two constitutes whole blade profile section XPYQZRSX.l 0Be the chord length of wing blade main body 1, l 1Be the chord length of whole blade, Δ β is l 0With l 1Between angle, i.e. leaf angular difference value.The design of the molded lines tortuosity of trailing edge 2 will be considered to guarantee to have bigger leaf angle difference DELTA β and bigger ratio of lift coefficient to drag coefficient value.
Δ β of the present invention chooses in 5 degree～20 degree scopes, gets l 1max=1.75l 0, l 1 l 0 = 1.3 ~ 1.75 ; Blade back YQZ molded lines is chosen less trailing edge molded lines tortuosity radius of curvature R guaranteeing that air-flow does not separate under the prerequisite of (separation of flow) kValue, R kValue is at l 1Choosing value in the scope of/(0.3～0.9).
Fig. 2 is the plan view of fan blade structure of the present invention.As shown in Figure 2, fan blade is made of leading portion hollow wing blade main body 1 and the solid trailing edge 2 of back segment, in the arc seat 3 at petiole 5 insertion machine aerofoil profile main bodys 1 inner chamber middle part, fastening with screw 8 and blade, the other end of petiole 5 is fixed on the impeller hub by flange 7.2～3 stiffening ribs 4 are set to increase the intensity of blade in wing blade main body 1 hollow lumen.
When making the different-diameter fan blade, can be by blower fan diameter, impeller hub diameter, intercept blade stock axial length as required, select the number of blade and rotating speed as required for use, and on the blade trailing edge lagging edge, do the different modes cutting and adjust the blade installation angle, can obtain required flow pattern, make the fan blade aeroperformance satisfy system requirements, realize efficiently operation.
The length of blade direction chord length mode of cutting off can be divided into Quan Yechang cutting and two kinds of forms of part chord length cutting, and the cutting of these two kinds of forms all can make full use of and guarantee Ye Dingqu capacity for work efficiently.Making axial flow velocity during the flow pattern design is smaller value at the impeller hub place.
The chord length of blade has been determined in the intercepting of blade trailing edge lagging edge, and three kinds of having provided by curve A, curve B or curve C intercepting of Fig. 2 are multi-form.Among Fig. 2, curve A is the trajectory of the long cutting of the full leaf of blade trailing edge, and curve C is the trajectory of part cut-off blade trailing edge, and curve B is between A, the mid-rail trace of two kinds of cutting track lines of C.Take cutting off of different modes, can obtain different P-Q curves and different η-Q curve, to satisfy the different requirements of using object.Wherein the P-Q value of curve A is lower than curve C.
For larger-diameter blower fan, be the 12M blower fan as diameter, fan blade basic segment chord length can reach about 1.5～2M.The blade excessive to chord length can be divided into whole chord length 2～3 sections making, and the structure that adopts wedge slot to connect is shown in the connection part structural drawing of Fig. 3 segmented blade.So can not need with unitary mould and large-scale extrusion equipment, in order to the fabricating cost that reduces mould.
As shown in Figure 4, shrouding is equipped with at internal diameter blade of the present invention place, has the preformed hole 11 that petiole is installed on the shrouding 9.As shown in Figure 5, end casing 10 is equipped with in blade external diameter of the present invention end, can be drilled with several little weep holes 12 on end casing 10.When impeller rotated, the ponding in the cavity relied on action of centrifugal force to be thrown out of by weep hole 12, with this ponding of in time getting rid of the blade inner chamber, guaranteed the dynamic balance accuracy and the normal operation of blade.
At the Φ 560mm that trial production of the present invention becomes, Φ 900mm is in the model machine of three kinds of specifications of Φ 2340mm, preceding second gear size blower fan is through test bed testing, and total pressure efficiency reaches 87.6%, and back one grade of size is tested through Shanghai good opportunity cooling tower, have energy-conservation 29%, the remarkable result of noise reduction 4.5dB (A).

Claims (4)

1、一种挤压截工艺成型的轴流式节能风机叶片，其特征在于由前段空心的机翼型主体(1)和后段实心的尾缘(2)构成，叶柄(5)插入机翼型主体(1)内腔中部的弧形座(3)中，用螺钉(8)与机翼型主体(1)紧固，叶柄(5)的另一端通过法兰(7)固定在叶轮轮毂上，叶片内径处装有封板(9)，封板(9)上开有安装叶柄(5)的预留孔(11)，叶片外径处装有端盖板(10)，端盖板(10)上钻有若干个排水孔(12)，机翼型主体(1)的弦长l0与整个叶片的弦长l1之间的夹角Δβ为5～20度， l 1 l 0 = 1.3 ~ 1.75 , 尾缘(2)的型线弯曲度曲率半径Rk值为l1/(0.3～0.9)，尾缘(2)的随边截切采用全叶长切割或部分弦长切割。1. An axial-flow energy-saving fan blade formed by an extrusion cutting process, which is characterized in that it is composed of a hollow airfoil main body (1) in the front section and a solid trailing edge (2) in the rear section, and the petiole (5) is inserted into the wing In the arc-shaped seat (3) in the middle of the cavity of the main body (1), fasten the airfoil main body (1) with screws (8), and the other end of the petiole (5) is fixed on the hub of the impeller through the flange (7). On the inner diameter of the blade, a sealing plate (9) is installed, and a reserved hole (11) for installing the petiole (5) is opened on the sealing plate (9), and an end cover plate (10) is installed at the outer diameter of the blade, and the end cover plate (10) is drilled with some drainage holes (12), and the included angle Δβ between the chord length l0 of the airfoil main body (1) and the chord length l1 of the whole blade is 5～20 degrees, l 1 l 0 = 1.3 ~ 1.75 , The radius of curvature R k of the profile curvature of the trailing edge (2) is l 1 /(0.3-0.9), and the trailing edge (2) is cut along the edge using full leaf length cutting or partial chord length cutting. 2、根据权利要求1的挤压截工艺成型的轴流式节能风机叶片，其特征在于所述机翼型主体(1)采用分段式结构，段与段之间采用楔形槽联接。2. The axial-flow energy-saving fan blade formed by the extrusion cutting process according to claim 1, characterized in that the airfoil-shaped main body (1) adopts a segmented structure, and the segments are connected by wedge-shaped grooves. 3、根据权利要求1的挤压截工艺成型的轴流式节能风机叶片，其特征在于所述机翼型主体(1)内腔中设置若干条与叶片中心线平行的加强筋(4)。3. The axial-flow energy-saving fan blade formed by the extrusion cutting process according to claim 1, characterized in that several reinforcing ribs (4) parallel to the centerline of the blade are arranged in the inner cavity of the airfoil-shaped main body (1). 4、根据权利要求1的挤压截工艺成型的轴流式节能风机叶片，其特征在于叶片材料采用铝合金或玻璃纤维增强塑料。4. The axial-flow energy-saving fan blade formed by the extrusion cutting process according to claim 1, characterized in that the blade material is made of aluminum alloy or glass fiber reinforced plastic.
CN200610030338A 2006-08-24 2006-08-24 Axial-flow energy-saving fan blades formed by extrusion cutting process Expired - Fee Related CN100595439C (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101418811B (en) * 2008-09-03 2010-11-10 中国航空工业第一集团公司北京航空材料研究院 Hollow fan blade for aircraft engine
CN101737918B (en) * 2009-12-17 2011-09-14 四川长虹空调有限公司 Deflector
CN101666329B (en) * 2009-09-17 2012-02-01 上海交通大学 Combined airfoil axial flow fan blade
CN102410253A (en) * 2011-11-28 2012-04-11 上海交通大学 Sheet type axial flow fan blade profile formed by adopting squeezing, pulling and cutting process
CN103410776A (en) * 2013-07-26 2013-11-27 浙江亿利达风机股份有限公司 Impeller and ventilator
CN103511343A (en) * 2012-06-19 2014-01-15 通用电气公司 Airfoil shape for use in compressor
CN104023955A (en) * 2011-11-02 2014-09-03 维斯塔斯风力系统有限公司 Method and production facility for manufacturing a wind turbine blade
CN106168228A (en) * 2016-08-17 2016-11-30 江苏兆胜空调有限公司 A kind of high-efficient low-noise axial wheel
CN106168227A (en) * 2016-08-17 2016-11-30 江苏兆胜空调有限公司 A kind of extruded hollow aluminium section bar airfoil vanes impeller
CN111828387A (en) * 2020-08-18 2020-10-27 浙江浙风科技有限公司 A fan blade of a large flow and low speed fan

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865158A (en) * 2010-06-25 2010-10-20 苏州顶裕节能设备有限公司 Forward wing type fan impeller

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101418811B (en) * 2008-09-03 2010-11-10 中国航空工业第一集团公司北京航空材料研究院 Hollow fan blade for aircraft engine
CN101666329B (en) * 2009-09-17 2012-02-01 上海交通大学 Combined airfoil axial flow fan blade
CN101737918B (en) * 2009-12-17 2011-09-14 四川长虹空调有限公司 Deflector
CN104023955A (en) * 2011-11-02 2014-09-03 维斯塔斯风力系统有限公司 Method and production facility for manufacturing a wind turbine blade
CN104023955B (en) * 2011-11-02 2016-09-07 维斯塔斯风力系统有限公司 For manufacturing method and the production equipment of wind turbine blade
CN102410253A (en) * 2011-11-28 2012-04-11 上海交通大学 Sheet type axial flow fan blade profile formed by adopting squeezing, pulling and cutting process
CN102410253B (en) * 2011-11-28 2013-07-17 上海交通大学 Blade profile of sheet-shaped axial flow fan formed by adopting squeezing, pulling and cutting process
CN103511343A (en) * 2012-06-19 2014-01-15 通用电气公司 Airfoil shape for use in compressor
CN103410776A (en) * 2013-07-26 2013-11-27 浙江亿利达风机股份有限公司 Impeller and ventilator
CN103410776B (en) * 2013-07-26 2015-12-09 浙江亿利达风机股份有限公司 Impeller and ventilator
CN106168228A (en) * 2016-08-17 2016-11-30 江苏兆胜空调有限公司 A kind of high-efficient low-noise axial wheel
CN106168227A (en) * 2016-08-17 2016-11-30 江苏兆胜空调有限公司 A kind of extruded hollow aluminium section bar airfoil vanes impeller
CN111828387A (en) * 2020-08-18 2020-10-27 浙江浙风科技有限公司 A fan blade of a large flow and low speed fan

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