CN100357610C - Axial ventilating machine impellor - Google Patents

Axial ventilating machine impellor Download PDF

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Publication number
CN100357610C
CN100357610C CNB031214649A CN03121464A CN100357610C CN 100357610 C CN100357610 C CN 100357610C CN B031214649 A CNB031214649 A CN B031214649A CN 03121464 A CN03121464 A CN 03121464A CN 100357610 C CN100357610 C CN 100357610C
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blade
section
cross
blades
angle
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CN1534200A (en
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谭春青
陈海生
梁锡智
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Zhongkesido Nanjing Energy Storage Technology Co ltd
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Institute of Engineering Thermophysics of CAS
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Abstract

The present invention discloses an impeller of an axial ventilating blower, which comprises a wheel hub, and a plurality of blades in a machine wing blade type or in a circular arc plate blade type. The wheel hub is surrounded with blades which forwards bent along the rotation direction, a front bending angle of each cross section of blades is successively added from the blade root to the blade tip, the front bending angle of the cross section of the blade root is zero, and the front bending angle of the cross section of the blade tip is at the maximum; the blades forwards sweep in an air inlet direction. The present invention has the advantages that boundary layers of the surfaces of the blades are controlled and restrained through the bending-sweeping angles of the blades, and the loss of the blades are reduced; thereby, the efficiency of the blower is improved; furthermore, the aerodynamic noise is also reduced. Through the model stage experiment, the present invention has the advantages of low blower noise, little flow loss and high efficiency, and can be widely applied to the industrial and civil ventilation and the process flow.

Description

Axial fan impeller
Technical field
The present invention relates to a kind of impeller, more particularly, it relates to a kind of impeller that is used for propeller fan.
Background technique
Existing propeller fan generally adopts wing blade profile or circular arc plate blade.In the pneumatic design and geometric modeling of blade, adopt the design theory of general complete three-dimensional radial equilibrium.The bending of dynamic and static blade, the amount of plunderring be not as design parameter.When geometry vanes is shaped, radially be formed by stacking blade by primitive blade cascade blade profile center.This design method and blade mould-forming method, can't control velocity distribution in the blade path by changing BLADE FORCE size and Orientation in the blade row, the secondary flow relevant such as separation, strength of vortex and secondary flow intensity of air-flow in the also uncontrollable blade path with flow losses, and make existing propeller fan exist shortcomings such as fan noise height, efficient are low.
Summary of the invention
One of purpose of the present invention is to overcome existing propeller fan and has noise height, inefficient deficiency; Two of purpose be by blade bend, multi parameters control such as the amount of plunderring, reduce flow losses and aerodynamic noise; Thereby provide a kind of axial fan impeller.
Technological scheme of the present invention is:
A kind of axial fan impeller provided by the invention, comprise wheel hub 7 and a plurality of wing blade profile or circular arc plate blade profile blade 8, blade 8 is provided with around wheel hub 7, described blade 8 is antecurvature along its sense of rotation, the kyphotic angle of blade 8 each cross section I～VI increases continuously from the blade root to the blade tip, the kyphotic angle of blade root cross section VI is zero, the kyphotic angle maximum of blade tip cross section I.
Kyphotic angle ε=34 of the blade tip cross section I of described blade 8 °.
Described blade 8 is to the airintake direction sweepforward, sweepforward angle α=20 °～30 °.
The established angle β of described blade 8 each cross section I～VI AFrom the blade root to the blade tip, reduce established angle β continuously ABetween 18 °～60 °.
Described blade 8 adopts the cast inblock structure with wheel hub 7, perhaps adopts welding or riveted joint mode to connect.Described impeller comprises 2～20 blades 8 that shape is identical.
Compared with prior art, the invention has the advantages that the curved angle of plunderring, control and restrained separating of blade surface boundary layer, thereby the loss that has reduced blade has improved the efficient of blower fan, thereby also reduced aerodynamic noise by blade.By the experiment of model level, fan noise of the present invention is low, and flow losses are little, the efficient height.The present invention can be widely used in industry and civilian ventilation and technological process.
Description of drawings
Fig. 1 is the structural representation of axial fan impeller of the present invention;
Fig. 2 is the side view of axial fan impeller of the present invention;
Fig. 3 is the schematic representation of blade in r-θ plane;
Fig. 4 is the schematic representation of blade in the r-z plane;
The drawing explanation
Blade profile I～VI wheel hub 7 blades 8 blade centrelines 9
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
For the convenience of narrating, adopt cylindrical coordinate (r, θ here, z), be the center with the center of circle O of wheel hub 7, r is the radial direction of wheel hub 7, just blade 8 is respectively installed the bearing of trend in cross section, θ be vector in the circumferential plane of wheel hub 7 and the angle between the r, z be wheel hub 7 axially.
The structural representation of axial fan impeller of the present invention in r-θ plane adopts the cast inblock structure between wheel hub 7 blade 8 identical with 4 shapes as shown in Figure 1.According to concrete application, also can take welding or riveted joint mode to be connected between wheel hub 7 and the blade 8, blade 8 numbers can change between 2～20, and the basic blade profile of blade 8 can adopt wing blade profile or circular arc plate blade profile.As a feature of the present invention, blade 8 is antecurvature along the blade sense of rotation shown in Fig. 1 in r-θ plane.As another feature of the present invention, blade 8 is on the whole to the airintake direction sweepforward, and sweepforward angle is α, as shown in Figure 2
Being distributed in of blade 8 each cross section kyphotic angle seen the most clearly among Fig. 3, chosen 6 representative sections in Fig. 3, and I～VI represents with Roman number, uses label O simultaneously 1～O 6The central position of expression respective cross-section, its middle section I is the blade tip cross section, cross section VI is the blade root cross section.The center O of blade root cross section VI 6With the line of wheel hub center of circle O be OO 6, described kyphotic angle is meant the center in each cross section and line and the OO of wheel hub center of circle O 6Between angle, for example, the kyphotic angle of cross section V is OO 5With OO 6Between angle.Fig. 3 gives the concrete numerical value of the kyphotic angle of each representative section in the present embodiment, the kyphotic angle of blade root cross section VI is 0, the kyphotic angle of cross section V is 8 °, the kyphotic angle of cross section IV is 15 °, the kyphotic angle of cross section III is 21 °, the kyphotic angle of cross section II is 28 °, and the kyphotic angle of blade tip cross section I is 34 °.As can be seen, the kyphotic angle in each cross section begins to increase continuously from blade root cross section VI, reaches maximum at I place, blade tip cross section.
Blade 8 is seen the most clearly in Fig. 4 to the situation of airintake direction sweepforward on the whole, and Fig. 4 is the schematic representation of blade 8 on the r-z plane.The line of blade 8 each kernel of section position is called blade centreline 9, and in the r-z plane, described blade centreline 9 is a straight line, and the sweepforward angle of blade is meant blade centreline 9 and aforesaid line OO 6Between angle, in the present embodiment, sweepforward angle α=22 °.
Similar to the design of existing blade, each cross section of blade 8 of the present invention has established angle β AWith certain chord length.In table 1, provide the main design parameters of blade 8 in the present embodiment, comprised the established angle β of each representative section I～VI A, chord length, and kyphotic angle and sweepforward angle.The chord length of described cross section I～VI is meant the distance between the blade profile two ends, and in Fig. 3, with being with the target label list to show, for example, the two ends of cross section II are respectively 2 ' and 2 respectively at the two ends of cross section I～VI ", its chord length is an end points 2 ' and 2 " between distance.
Table 1
Figure C0312146400051

Claims (7)

1, a kind of axial fan impeller, comprise wheel hub (7) and a plurality of wing blade profile or circular arc plate blade profile blade (8), blade (8) is provided with around wheel hub (7), it is characterized in that, described blade (8) is antecurvature along its sense of rotation, and (kyphotic angle of I～VI) increases continuously from the blade root to the blade tip, and the kyphotic angle of blade root cross section (VI) is zero in blade (8) each cross section, the kyphotic angle maximum in blade tip cross section (I), kyphotic angle ε=34 in the blade tip cross section (I) of described blade (8) °.
2, axial fan impeller according to claim 1 is characterized in that, described blade (8) is to the airintake direction sweepforward.
3, axial fan impeller according to claim 2 is characterized in that, described blade (8) sweepforward angle α=20 °～30 °.
4, axial fan impeller according to claim 1 is characterized in that, each cross section of described blade (8) (established angle β of I～VI) AFrom the blade root to the blade tip, reduce continuously.
5, axial fan impeller according to claim 4 is characterized in that, each cross section of described blade (8) (established angle β of I～VI) ABetween 18 °～60 °.
6, axial fan impeller according to claim 1 is characterized in that, described blade (8) adopts the cast inblock structure with wheel hub (7), perhaps adopts welding or riveted joint mode to connect.
7, axial fan impeller according to claim 1 is characterized in that, described impeller comprises 2～20 blades (8) that shape is identical.
CNB031214649A 2003-03-28 2003-03-28 Axial ventilating machine impellor Expired - Lifetime CN100357610C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB031214649A CN100357610C (en) 2003-03-28 2003-03-28 Axial ventilating machine impellor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB031214649A CN100357610C (en) 2003-03-28 2003-03-28 Axial ventilating machine impellor

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CN1534200A CN1534200A (en) 2004-10-06
CN100357610C true CN100357610C (en) 2007-12-26

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102400947A (en) * 2011-11-18 2012-04-04 江苏国泉泵业制造有限公司 Axial flow pump impeller with sweepforward vanes
CN111350694B (en) * 2020-03-13 2021-02-19 浙江上风高科专风实业有限公司 Machining method for loss-reducing fan blade with bent blade tip
CN111536075B (en) * 2020-03-25 2024-05-28 浙江科贸智能机电股份有限公司 Blade of ventilator and axial flow ventilator thereof
CN116398471A (en) * 2023-04-11 2023-07-07 威海克莱特菲尔风机股份有限公司 Sweepforward blade impeller and constitute axial fan

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2165269Y (en) * 1993-05-20 1994-05-18 北京鼓风机一分厂 Sweptforward front-inclined blade type low-noise axial-flow fan
CN2454575Y (en) * 2000-12-25 2001-10-17 南京宏运模塑工程有限公司 Plastic axial cooling fan
CN2473366Y (en) * 2001-03-21 2002-01-23 保定航空技术实业有限公司 New impeller
CN2527761Y (en) * 2001-11-27 2002-12-25 北京森博苑科技有限公司 Forward bending twisted plate type axial flow fan blade

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2165269Y (en) * 1993-05-20 1994-05-18 北京鼓风机一分厂 Sweptforward front-inclined blade type low-noise axial-flow fan
CN2454575Y (en) * 2000-12-25 2001-10-17 南京宏运模塑工程有限公司 Plastic axial cooling fan
CN2473366Y (en) * 2001-03-21 2002-01-23 保定航空技术实业有限公司 New impeller
CN2527761Y (en) * 2001-11-27 2002-12-25 北京森博苑科技有限公司 Forward bending twisted plate type axial flow fan blade

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