CN201354766Y - Axial-flow radiator fan - Google Patents

Abstract

The utility model discloses an axial-flow radiator fan, which comprises a motor and a vane wheel; wherein, a plurality of vanes are evenly distributed on the circumference of the vane wheel; the chord length of each vane is first reduced and then increased from the vane root to the vane tip to form non-linear distribution; the chord length of the vane root of each vane is 20.5mm; the chord length of the vane tip is 26.5mm; the mounting angle of each vane is gradually reduced from the vane root to the vane tip to form the non-linear distribution; the mounting angle of the vane root is 35.5 degrees; the mounting angle of the vane tip is 27 degrees; and the sweepforward angle of each vane is 0 degree. Adopting the technical scheme, the utility model has the following advantages: compared with the like fanes, at the same rotation speed, the axial-flow radiator fan has large wind volume, good steadiness and low noise and does not vibrate, and thereby, the radiating effect is greatly enhanced as well.

Description

A kind of axial flow radiation fan

Technical field

The utility model relates to a kind of radiation fan, and particularly a kind of air quantity is big, good heat dissipation effect, and the degree of balance is difficult for the axial flow radiation fan of vibration well.

Background technique

Advantages such as the small-size shaft flow fan 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, requirement aspect technological innovation improves gradually, fan blade is the main body of fan, its physical dimension, profile and blade quantity have decisive influence to the performance of fan, the parameter designing of existing fan blade is reasonable inadequately, so or the high air quantity of rotating speed is big, but noise is also bigger; Air quantity is big but smoothness is not enough, and easily vibration always can not be satisfactory.

Summary of the invention

The utility model provides a kind of air quantity big at above-mentioned the deficiencies in the prior art, and the degree of balance is not well vibrated, the miniature radiation fan of good heat dissipation effect, this fan is by the yardstick to blade, and geometrical shape and quantity are carried out appropriate design, the high air quantity of rotating speed is big when making operation, and smoothness does not well vibrate.

The technical solution of the utility model is achieved in that

A kind of axial flow radiation fan comprises motor, impeller, is evenly distributed with several blades on circumference of impeller, and the chord length of described blade is reduced earlier afterwards to increase to blade tip by blade root and is nonlinear Distribution, and the blade root chord length of blade is 20.5mm, and the blade tip chord length is 26.5mm; Blade angle reduces to be nonlinear Distribution by blade root gradually to blade tip, and the blade root established angle is 35.5 °, and the blade tip established angle is 27 °, and the sweepforward angle of blade is 0 °.

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 all is in the same plane perpendicular to fan shaft, and the torsional centre line of blade is a straight line.

As preferably, the number of described blade is 7.

As preferably, the diameter of described impeller is 45.2mm.

Adopted the advantage that the utlity model has of technique scheme to be: the similar fan of comparing, under same rotating speed, air quantity is big, and smoothness does not well vibrate, and noise is also little, thereby makes that also radiating effect improves greatly.

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 45.2mm, impeller 2 centers link to each other with motor 1, are evenly distributed with 7 blades 3 on impeller 2 circumference; Blade is the main body of fan, its physical dimension, and profile and blade quantity have decisive influence to the performance of fan, in order to improve fan efficiency, increase air quantity, improve degree of operating steadily, and blade 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 reduced earlier afterwards to increase to blade tip by blade root and are nonlinear Distribution, and the blade root chord length of blade 3 is 20.5mm, and the blade tip chord length is 26.5mm; 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 35.5 °, reverses bigger; As shown in Figure 2, blade tip established angle A is 27 °, reverses less; Thereby make blade 3 each cross section under the fan design state, all be in efficacious workaround.

(3), the torsional centre 5 in each cross section of same blade 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 3 is a straight line, the torsional centre line 4 of each blade all is in the same plane perpendicular to fan shaft, 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 blade 3 is 0 °.

Claims (4)

1, a kind of axial flow radiation 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 reduced earlier afterwards to increase to blade tip by blade root and is nonlinear Distribution, the blade root chord length of blade (3) is 20.5mm, and the blade tip chord length is 26.5mm; Blade (3) established angle reduces to be nonlinear Distribution by blade root gradually to blade tip, and the blade root established angle is 35.5 °, and the blade tip established angle is 27 °, and the sweepforward angle of blade (3) is 0 °.

2, a kind of axial flow radiation fan according to claim 1, it 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, the torsional centre line (4) of each blade all is in the same plane perpendicular to fan shaft, and the torsional centre line (4) of blade (3) is a straight line.

3, a kind of axial flow radiation fan according to claim 1, it is characterized in that: the number of described blade (3) is 7.

4, a kind of axial flow radiation fan according to claim 1, it is characterized in that: the diameter of described impeller (2) is 45.2mm.

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