CN103016371A

CN103016371A - Axial flow fan

Info

Publication number: CN103016371A
Application number: CN2012105200772A
Authority: CN
Inventors: 邱荣泉
Original assignee: ZHEJIANG TAIDA MICROMOTOR CO Ltd
Current assignee: ZHEJIANG TAIDA MICROMOTOR CO Ltd
Priority date: 2012-12-03
Filing date: 2012-12-03
Publication date: 2013-04-03
Anticipated expiration: 2032-12-03
Also published as: CN103016371B

Abstract

The invention discloses an axial flow fan, which comprises a motor and an impeller, wherein a plurality of blades of the same shapes and sizes are uniformly distributed on the outer circumference of the impeller; the diameter of the impeller is 98 millimeters; the sweep-forward angles of the blades increase gradually from blade roots to blade tips, and are distributed nonlinearly; the sweep-forward angles of blade roots are zero degree; the sweep-forward angles of blade tips are 3.5 degrees; the chord lengths of the blades increase gradually from blade roots to blade tips, and are distributed linearly; the chord lengths of blade roots are 45.5 millimeters; the chord lengths of blade tips are 48.5 millimeters; the installation angles of the blades decrease gradually from blade roots to blade tips, and are distributed in a nonlinear way; the installation angles of blade roots are 30 degrees; and the installation angles of blade tips are 28.5 degrees. Compared with the conventional fan, the axial flow fan has the advantages that: through reasonable design of the shapes, quantity, torsion angles and the like of the blades in the technical scheme, high rotating speed and low noise are realized under the same power; and moreover, high air power performance, large air volume and a better radiating effect are realized.

Description

A kind of axial fan

Technical field

The present invention relates to a kind of radiation fan, particularly the good axial fan of a kind of pneumatic property.

Background technique

The advantages such as axial fan is because to have a volume little, and is easy for installation have been widely used in the fields such as electronic equipment, power apparatus, electric welding machine, numerical controlled machinery 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 existing axial fan is because blade shape design is unreasonable, so that fan noise is large, electric current is unstable, and the shortcoming such as rotary speed unstabilization is fixed.

Summary of the invention

The present invention is directed to above-mentioned the deficiencies in the prior art, provide a kind of in aerodynamic quality, noise level, the rotating speed aspect has the axial fan of comprehensive advantage, this fan is by to the yardstick of blade, and geometrical shape and quantity are carried out appropriate design, so that noise is low during the fan operation, rotating speed is high, and smoothness well can vibration-generating.

Technological scheme of the present invention is achieved in that

A kind of axial fan, comprise motor, impeller, be evenly distributed with all identical blades of a plurality of shapes, size at the impeller outer circumference, the diameter of impeller is 98mm, the sweepforward angle of blade is increased gradually to blade tip by blade root and is nonlinear Distribution, the sweepforward angle of blade root is 0 °, and the sweepforward angle of blade tip is 3.5 °; The chord length of described blade is increased gradually to blade tip by blade root and is linear distribution, the blade root chord length is 45.5mm, and the blade tip chord length is 48.5mm, and the established angle of blade reduces to be nonlinear Distribution by blade root gradually to blade tip, the blade root established angle is 30 °, and the blade tip established angle is 28.5 °.

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 blade is curve.

As preferably, the number of described blade is 9.

Adopted the present invention of technique scheme by blade shape, quantity, windup-degree etc. have been carried out rational design, made its in the past fan of comparing, under same power, rotating speed is high, and noise is low, and good aerodynamic quality, air quantity is large, and radiating effect is better.

Description of drawings

Fig. 1 is structural representation of the present invention;

Fig. 2 be Fig. 1 B-B to blade line style enlarged view.

Embodiment

The specific embodiment of the present invention is as follows:

Embodiment: a kind of axial fan of the present invention as shown in Figure 1, comprises motor 1, impeller 2, the diameter of described impeller 2 is 98mm, motor 1 is micro motor, and impeller 2 centers link to each other with motor 1, is evenly distributed with all identical blades 3 of 9 plate shapes, size at 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 simultaneously fan efficiency, reduce fan noise, increase air quantity and improve radiating effect, and blade of the present invention has following feature:

(1), the chord length of described blade is increased gradually to blade tip by blade root and is linear distribution, and the blade root chord length is 45.5mm, and the blade tip chord length is 48.5mm; Adopt above-mentioned shape not only to be conducive to alleviate the weight of blade, more be conducive to reduce the heavy burden of impeller, 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 invention place has different established angles with respect to plane of rotation, be that blade 3 has relative torsion, the established angle of blade 3 reduces to be nonlinear Distribution by blade root gradually to blade tip, the blade root established angle is 30 °, and the blade tip established angle is 28.5 °, thereby makes blade 3 each cross section all be in efficacious workaround under the fan design state.

(3), as shown in Figure 1, the torsional centre 5 in same blade 3 each cross section is as for the mid point of the string of a musical instrument 6, the line of each cross section torsional centre is torsional centre line 4, the torsional centre line 4 of blade of the present invention is curve, torsional centre line 4 forms sweepforward angle with respect to axle center and the line between the blade 3 root torsional centres of fan, and the sweepforward angle of blade root is 0 °, and the sweepforward angle of blade tip is 3.5 °.

Claims

1. axial fan, comprise motor, impeller, be evenly distributed with all identical blades of a plurality of shapes, size at the impeller outer circumference, it is characterized in that: the diameter of impeller is 98mm, the sweepforward angle of blade is increased gradually to blade tip by blade root and is nonlinear Distribution, the sweepforward angle of blade root is 0 °, and the sweepforward angle of blade tip is 3.5 °; The chord length of described blade is increased gradually to blade tip by blade root and is linear distribution, the blade root chord length is 45.5mm, and the blade tip chord length is 48.5mm, and the established angle of blade reduces to be nonlinear Distribution by blade root gradually to blade tip, the blade root established angle is 30 °, and the blade tip established angle is 28.5 °.

2. a kind of axial fan according to claim 1, it is characterized in that: 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 blade is curve.

3. a kind of axial fan according to claim 1, it is characterized in that: the number of described blade is 9.