CN208106829U

CN208106829U - Novel swept-back T-type axial-flow fan blade

Info

Publication number: CN208106829U
Application number: CN201820600453.1U
Authority: CN
Inventors: 王明坤; 王新
Original assignee: Weihai Creditfan Ventilator Co Ltd
Current assignee: Weihai Creditfan Ventilator Co Ltd
Priority date: 2018-04-25
Filing date: 2018-04-25
Publication date: 2018-11-16
Anticipated expiration: 2028-04-25

Abstract

The utility model relates to axial flow blower technical fields, specifically refer to a kind of novel swept-back T-type axial-flow fan blade, including blade body, and the blade body includes windward side, leeward, blade inlet edge and trailing edge, it is characterised in that：The trailing edge with the direction for deviateing blade body central axes from leeward towards windward side at blade tip to from blade root from being distorted, trailing edge is gradually close to blade body central axes from blade tip to blade root, the trailing edge sweepback, the blade tip width of the blade body is greater than blade root width, the windward side of the blade and leeward are convex, the contour line of the blade body cross section is made of upper molded line and lower profile, and the utility model has the advantages that blade taper than big, blade tip intensity is high, vane manufacturing is at low cost.

Description

Novel swept-back T-type axial-flow fan blade

Technical field

The utility model relates to axial flow blower technical fields, specifically refer to a kind of novel swept-back T-type axial flow blower Blade.

Background technique

Currently, existing large axial flow fan blade is mostly to distort T-type blade, blade taper is than being mostly example between 0.3 ~ 0.7 Such as U.S.'s Hudson T-type blade, circular rectors design, the blade such as this blade use have same or similar wind in the radial direction Pressure, therefore the chord of foil of blade tip is reduced, while increasing distortion angle of the blade root with respect to blade tip, reach and weakens blade tip due to phase To the high wind pressure that revolving speed is big and generates, is conducive to reduce the draught head on blade radius direction, reduces the Radial Flow of air-flow, make Air-flow is more stable, and Chinese patent CN203175623U discloses a kind of swept-back fan blade, including in leaf root part, blade Portion and tip segment, it is characterised in that：Leaf root part to middle part of blade forward edge deviates, backward by middle part of blade to tip segment Edge offset, this also reduces original common swept-back blade while guaranteeing that moment of flexure is waved in the reduction of swept-back blade using novel Bring pitching moment reduces costs to reduce leaf weight under the premise of ensure that blade headroom, but above-mentioned Patent such as still uses at the circular rectors T-type blade, to realize high wind pressure Wind Volume, blade certainly will be required to have smaller taper ratio, more More blade quantities, and blower diameter, mostly between 8m ~ 10m, this undoubtedly increases the manufacturing cost of blower, and smaller point Ratio is cut, causes blade tip chord of foil smaller, the decline of blade tip intensity causes blade lift to decline, tight due to water resource in addition, in recent years , large-scale air cooling axial flow blower and large-scale composite cold axial flow blower constantly substitute conventional large-scale mechanical force cooling column axial flow blower, because This brings the continuous improvement of design conditions wind pressure, and therefore, the cost of conventional T-type blade blower is also higher and higher.

Summary of the invention

Utility model aims to solve the deficiencies in the prior art, provide a kind of structure novel, blade taper than it is big, Blade tip enhancing can realize that high wind pressure Wind Volume can reduce the novel swept-back T-type axial flow blower of vane manufacturing cost again Blade.

Technical solution adopted by the utility model to solve its technical problems is：

A kind of novel swept-back T-type axial-flow fan blade, including blade body, the blade body include windward side, back Wind face, blade inlet edge and trailing edge, it is characterised in that：The trailing edge by blade tip from it is leeward towards windward side to deviate The direction of blade body central axes is to distortion at blade root, in favor of realizing the bigger air quantity of higher wind pressure.

The distortion angle of blade body described in the utility model is 7 °.

Trailing edge described in the utility model is gradually close to blade body central axes from blade tip to blade root, after the blade Edge angle of sweep is 1.1 ° -1.5 °, increases blade tip camber while blade tip chord length in favor of increasing, reduces vane manufacturing material Expect cost.

The taper ratio of blade body described in the utility model is 1.1, in favor of realizing blade tip enhancing, improves the useful of blower Function.

The windward side of blade body described in the utility model and leeward are convex, in favor of obtaining higher liter resistance Than the contour line of the blade body cross section is made of upper molded line and lower profile, the contour line of the blade body cross section Scaling be 0.8-1.5.

The utility model is due to using the above structure, having structure novel, blade taper than big, blade tip intensity is high, can It enough realizes the advantages that high wind pressure Wind Volume can reduce vane manufacturing cost again, there is excellent work in actual test and application Make efficiency.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of the utility model.

Fig. 2 is the left view of Fig. 1 in the utility model.

Fig. 3 is the coordinate diagram of blade cross-sectional profiles line in the utility model.

Specific embodiment

The utility model is illustrated with reference to the accompanying drawings and examples.

A kind of novel swept-back T-type axial-flow fan blade, including blade body 1, the blade body 1 include windward side 2, Leeward 3, blade inlet edge 4 and trailing edge 5, described 1 one end of blade body are blade root 6, and the other end is blade tip 7, and feature exists In：The whole blade body 1 is in distorted shape, and the trailing edge 5 is from blade tip 7 from leeward 3 to windward side 2 to deviate blade The direction of ontology central axes 8 is distorted to blade root 6, in favor of realizing the bigger air quantity of higher wind pressure, the torsion of the blade body 1 Bent angle is 7 °, the trailing edge 5 gradually close to blade body central axes 8, trailing edge 5 from blade tip 7 to blade root 6 Angle of sweep is 1.1 ° -1.5 °, increases blade tip camber while blade tip chord length in favor of increasing, reduce blower material at This, the width of the blade tip 7 is greater than the width of blade root 6, and the taper ratio of the blade body 1 is 1.1, in favor of realizing that blade tip increases By force, the useful work of blower is improved, the windward side 2 of the blade body 1 and leeward 3 are convex, higher in favor of obtaining Lift resistance ratio, the contour line of 1 cross section of blade body is made of upper molded line and lower profile, as shown in figure 3, the upper molded line Meet coordinate relationship described in following table with the parameter point in lower profile, wherein X1 is upper profile coordinate, and X2 is mo(u)ld bottom half line coordinates, Y For longitudinal coordinate, the scaling of the contour line of 1 cross section of blade body is 0.8-1.5.

During fabrication, blade body is biconvex aerofoil profile to the utility model, and blade body is designed using converted quantity, after blade Edge sweepback design, sweepback angle are 1.1 ° -1.5 °, blade tip enhancing design, and for blade body integral into anti-T-type, taper ratio is 1.1, Blade root one end in blade body is fixedly connected by 7 ° of blade body entirety distortion angle with petiole when in use, blade body The axis of central axes and petiole coincides, and blade is connected with axial flow blower by petiole and carries out subsequent use, this reality There is excellent working efficiency in actual test and application with novel, the maximal efficiency of the blade body is up to 88% or so.

The utility model is due to using the above structure, having structure novel, blade taper than big, blade tip intensity is high, can It enough realizes the advantages that high wind pressure Wind Volume can reduce vane manufacturing cost again, and then reduces the manufacturing cost of blower, this is practical It is novel to be widely used in large cooling column and air cooler, and obtain the approval of vast air cooler producer.

Claims

1. a kind of novel swept-back T-type axial-flow fan blade, including blade body, the blade body includes windward side, leeward Face, blade inlet edge and trailing edge, it is characterised in that：The trailing edge by blade tip from it is leeward towards windward side to deviate leaf The direction of piece ontology central axes is distorted at blade root.

2. a kind of novel swept-back T-type axial-flow fan blade according to claim 1, it is characterised in that the blade body Distortion angle be 7 °.

3. a kind of novel swept-back T-type axial-flow fan blade according to claim 2, it is characterised in that the trailing edge Gradually close to blade body central axes from blade tip to blade root, the trailing edge angle of sweep is 1.1 ° -1.5 °.

4. a kind of novel swept-back T-type axial-flow fan blade according to claim 3, it is characterised in that the blade body Taper ratio be 1.1.

5. a kind of novel swept-back T-type axial-flow fan blade according to claim 4, it is characterised in that the blade body Windward side and leeward it is convex, the contour line of the blade body cross section is made of upper molded line and lower profile, institute The scaling for stating the contour line of blade body cross section is 0.8-1.5.