CN201339602Y

CN201339602Y - Axial flow fan

Info

Publication number: CN201339602Y
Application number: CNU2008201715586U
Authority: CN
Inventors: 邱荣泉
Original assignee: Individual
Current assignee: ZHEJIANG TAIDA MICROMOTOR CO Ltd
Priority date: 2008-12-31
Filing date: 2008-12-31
Publication date: 2009-11-04
Anticipated expiration: 2018-12-31

Abstract

The utility model discloses an axial flow fan which comprises a motor and an impeller. A plurality of blades are evenly distributed on the circumference of the impeller; the chord lengths of the blades increase gradually from the roots to the tips of the blades and are in nonlinear arrangement; the installation angles of the blades decrease gradually from the roots to the tips of the blades and are in nonlinear arrangement; the installation angle of the roots of the blades is 41 degrees; the installation angle of the tips of the blades is 32 degrees; and the sweepforward angle of the blades is zero. By adopting the technical proposal, the axial flow fan has comprehensive advantages in aerodynamic performance, noise level and rotation speed of the blades, and by reasonably arranging the dimension, geometrical shape and number of the blades, the utility model enables the axial flow fan to be low in noise, high in rotation speed and good in stability without vibration during operation.

Description

A kind of axial fan

Technical field

The utility model relates to a kind of axial fan, the axial fan that particularly a kind of pneumatic property is good and noise is little, the degree of balance is good.

Background technique

Advantages such as small-sized fans is little owing to volume, and is easy for installation have been widely used in electronic equipment, medical equipment, computer, power apparatus, electric welding machine, numerical controlled machinery, and fields such as office appliance automation are as the usefulness of ventilation and heat.

Along with developing rapidly of industry, the requirement aspect technological innovation improves gradually, has both required fan efficient to improve, and reduces noise, and requirement can improve rotating speed again, increases air quantity; But mostly existing axial fan is for the design of different purpose of design, has plenty of in order to raise the efficiency, and has plenty of in order to improve rotating speed, what have then is in order to reduce noise, or the like, these fans overwhelming majority only has the advantage of single performance, therefore can not satisfy requirement in many ways simultaneously.

Summary of the invention

The utility model is at above-mentioned the deficiencies in the prior art, provide a kind of in aerodynamic quality, noise level, the blade rotational speed aspect has the axial fan of comprehensive advantage, this fan is by the yardstick to blade, and geometrical shape and quantity are carried out appropriate design, and noise is low when making operation, the rotating speed height, smoothness does not well vibrate.

The technical solution of the utility model is achieved in that

A kind of axial fan, comprise motor, impeller, on circumference of impeller, be evenly distributed with several blades, the chord length of described blade is increased gradually to blade tip by blade root and is nonlinear Distribution, blade angle reduces to be nonlinear Distribution by blade root gradually to blade tip, the blade root established angle is 41 °, and the blade tip established angle is 32 °, and the sweepforward angle of blade is 0 °.

As preferably, the number of described blade is 5.

As preferably, the diameter of described impeller is 35mm.

As preferably, the torsional centre in each cross section of blade places the mid point of the string of a musical instrument, and the torsional centre line of each blade is in the same plane perpendicular to fan shaft, and described torsional centre line is a straight line.

As preferably, the blade root chord length is 20mm, and the blade tip chord length is 26mm.

Adopted the advantage that the utlity model has of technique scheme to be: the similar fan of comparing, rotating speed height not only, noise is low, and good aerodynamic quality, and radiating effect is better.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 be Fig. 1 B-B to the blade line illustration.

Embodiment

Embodiment of the present utility model is as follows:

Embodiment: a kind of axial fan of the present utility model, as shown in Figure 1, comprise motor 1, impeller 2, the diameter of described impeller 2 is 35mm, impeller 2 centers link to each other with motor 1, are evenly distributed with 5 blades 3 on impeller 2 circumference; Blade 3 is main bodys of fan, its physical dimension, and profile and blade quantity have decisive influence to the performance of fan, in order to improve fan efficiency simultaneously, reduce fan noise, increase air quantity and improve radiating effect, blade 3 of the present utility model has following feature:

(1), have higher static pressure liter for making blade, the solidity of unlikely again excessive increase fan, the chord length of described blade 3 are increased gradually to blade tip by blade root and are nonlinear Distribution, and the blade root chord length is 20mm, and the blade tip chord length is 26mm; Such shape not only helps alleviating the weight of blade, more helps reducing the heavy burden of impeller, and the aerodynamic efficiency of fan is improved.

(2), the established angle of blade is the string of a musical instrument in each cross section of blade and the angle between the plane of rotation, the cross section of the blade 3 at different radial distances of the present utility model place has different established angles with respect to plane of rotation, be that blade 3 has relatively and reverses, blade 3 established angles reduce to be nonlinear Distribution by blade root gradually to blade tip, the blade root established angle is 41 °, reverses bigger; As shown in Figure 2, blade tip established angle A is 32 °, reverse less, thereby make blade 3 each cross section under the fan design state, all be in efficacious workaround.

(3), the torsional centre 5 in same blade 3 each cross section places the mid point of the string of a musical instrument, the line of each cross section torsional centre is a torsional centre line 4, the torsional centre line 4 of the utility model blade is a straight line, the torsional centre line 4 of each blade is in the same plane perpendicular to fan shaft,, described torsional centre line is a straight line, torsional centre line 4 forms sweepforward angle with respect to the axle center and the line between the blade 3 root torsional centres of fan, and the sweepforward angle of each blade 3 of the utility model is 0 °.

Claims

1, a kind of axial fan, comprise motor (1), impeller (2), on impeller (2) circumference, be evenly distributed with several blades (3), it is characterized in that: the chord length of described blade (3) is increased gradually to blade tip by blade root and is nonlinear Distribution, blade (3) established angle reduces to be nonlinear Distribution by blade root gradually to blade tip, the blade root established angle is 41 °, and the blade tip established angle is 32 °, and the sweepforward angle of blade (3) is 0 °.

2, a kind of axial fan according to claim 1 is characterized in that: the number of described blade (3) is 5.

3, a kind of axial fan according to claim 1 is characterized in that: the diameter of described impeller (2) is 35mm.

4, a kind of axial fan according to claim 1 is characterized in that: the torsional centre (5) in each cross section of blade (3) places the mid point of the string of a musical instrument, and the torsional centre line (4) of each blade is in the same plane perpendicular to fan shaft, and described torsional centre line (4) is a straight line.

5, a kind of axial fan according to claim 1 is characterized in that: the blade root chord length is 20mm, and the blade tip chord length is 26mm.