CN201588815U

CN201588815U - Small-sized fan

Info

Publication number: CN201588815U
Application number: CN2009202953406U
Authority: CN
Inventors: 邱荣泉
Original assignee: Individual
Current assignee: ZHEJIANG TAIDA MICROMOTOR CO Ltd
Priority date: 2009-12-28
Filing date: 2009-12-28
Publication date: 2010-09-22
Anticipated expiration: 2019-12-28

Abstract

The utility model discloses a small-sized fan which comprises a motor and an impeller, wherein a plurality of blades of the same shape and size are uniformly distributed on the circumference of the impeller; the chord lengths of the blades are gradually increased from the blade root to the blade tip with a linear distribution, the chord length of the blade root is 38 mm and the chord length of the blade tip is 40.5 mm; and the installation angles of the blades are gradually reduced from the blade root to the blade tip with a nonlinear distribution, the installation angle of the blade root is 22 degrees, the installation angle of the blade tip is 18.5 degrees, and the forward sweep angle of the blades is 0 degree. With the technical scheme, the small-sized fan has the advantages of high wind flow, good stability with no vibration, small noise and improvement on heat-dissipating effect.

Description

A kind of small-sized fans

Technical field

The utility model relates to a kind of small-sized fans, the small-sized heat radiating fan that particularly a kind of pneumatic property is good and 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 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 the fan operation, the rotating speed height, smoothness well can not vibrate.

The technical solution of the utility model is achieved in that

A kind of small-sized fans, comprise motor, impeller, on circumference of impeller, be evenly distributed with a plurality of shapes, big or small all identical blade, 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 38mm, and the blade tip chord length is 40.5mm, the established angle of blade reduces to be nonlinear Distribution by blade root gradually to blade tip, the blade root established angle is 22 °, and the blade tip established angle is 18.5 °, 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 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 5.

As preferably, the diameter of impeller is 60.5mm.

Adopted the advantage that the utlity model has of technique scheme to be: the fan in the past of comparing, under same rotating speed, noise is low, and good aerodynamic quality, and air quantity is big, 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 small-sized fans of the present utility model, as shown in Figure 1, comprise motor 1, impeller 2, the diameter of described impeller 2 is 60.5mm, and motor 1 is a micro motor, and 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, 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 are increased gradually to blade tip by blade root and are nonlinear Distribution, and the blade root chord length is 38mm, and the blade tip chord length is 40.5mm; Adopt above-mentioned shape not only to help alleviating the weight of blade, more help reducing 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 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 22 °, reverses bigger; As shown in Figure 2, blade tip established angle A is 18.5 °, reverse less, thereby make blade 3 each cross section under the fan design state, all be in efficacious workaround.

(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 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, and 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. small-sized fans, comprise motor (1), impeller (2), on impeller (2) circumference, be evenly distributed with a plurality of shapes, big or small all identical blade (3), it is characterized in that: the chord length of described blade (3) is increased gradually to blade tip by blade root and is linear distribution, and the blade root chord length is 38mm, and the blade tip chord length is 40.5mm, the established angle of blade (3) reduces to be nonlinear Distribution by blade root gradually to blade tip, the blade root established angle is 22 °, and the blade tip established angle is 18.5 °, and the sweepforward angle of blade (3) is 0 °.

2. a kind of small-sized fans 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 the torsional centre line of blade (3) is a straight line.

3. a kind of small-sized fans according to claim 1 is characterized in that: a few days of described blade (3) is 5.

4. a kind of small-sized fans according to claim 1 is characterized in that: the diameter of impeller (2) is 60.5mm.