CN2376552Y

CN2376552Y - Screw type impeller axial-flow fan

Info

Publication number: CN2376552Y
Application number: CN 99220838
Authority: CN
Inventors: 胡敏德
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-11
Filing date: 1999-05-11
Publication date: 2000-05-03
Anticipated expiration: 2009-05-11

Abstract

The utility model relates to a screw type blade axial-flow fan, which comprises a rotation axle, an end cover, a partition plate and blades. The screw type blade axial-flow fan is characterized in that the blade is made into a twisting spiral type. Each blade is a continuous integral body along an axial length. The utility model has the advantage that the blade is made into the twisting spiral type and is the continuous integral body along the axial length. In the process of turning into a working area, each blade gradually enters and is disengaged from a spiral casing from one end to the other end. A certain overlap region is formed between the adjacent blades. Thereby, the screw type blade axial-flow fan has the advantages of even air resistance acceptance, enhancement of instant blast continuity, reduction of airflow shock to the spiral casing, enhancement of rotation stability, gentle and even wind force, and noise reduction.

Description

The screw blade axial-flow fan

The utility model is the axial-flow fan of air conditioner indoor machine, is the improvement to existing axial-flow fan structure.

Axial-flow fan is the blast device of air conditioner indoor machine.Existing axial-flow fan is divided into two kinds of structural types by its blade distribution form: a kind of is straight vertically formula blade, circumferential non-homogeneous arranged type (referring to Fig. 1, Fig. 2); Another kind is the straight formula blade that tilts vertically, circumferential non-homogeneous arranged type (referring to Fig. 3, Fig. 4).People know, noise of indoor unit is mainly derived from the impact to spiral case of the vibrations of axial-flow fan and air fluid, and the grating of blade and air.When air-supply, if the continuity of blowing between the adjacent blades in the axial-flow fan is bad, or there is discontiguous area, noise will increase.For this reason, the structural type of the blade of axial-flow fan is improved to second kind of form by above-mentioned first form.Second kind of form also is called the not equidistant axial-flow fan of oblique installing type.The axial-flow fan of this kind structural type has played certain mitigation to reducing noise to a certain extent.But still also exist some defective: though 1 blade is to be in tilted layout, but because blade quantity limited (being generally 33-35), the blade interruption is cut apart discontinuous vertically, spiral case is interrupted by the not even air fluid of resistance of air impacts, produce vibrations and noise, this has reflected the narrow limitation that the blade inclined is arranged noise reduction sound.2, whole axial-flow fan is a segmented, promptly is assembled into an integral body by several monomer structures.(being between the vane end faces dividing plate) adopts ultrasonic welding in the segmentation joint.Said structure still exists some defectives: a, segmentation clamping welding, and accumulated error is big, and each section coaxality is difficult to guarantee; B, because of the difference in welding base metal butt joint gap, easily cause rosin joint, influence its mechanical property (stretch, reverse, shock resistance).Above-mentioned defective is to exerting an adverse impact in the reliability and the working life of work.3, the length of axial-flow fan depends on the combination joint number, and length can not change continuously.4, each joint blade injection mold structure complexity, the cost height, the mould fault is many, and yield rate is low.People are expecting that the technological scheme of the axial-flow fan that a kind of noise is low and combination property is high produces as early as possible.

The purpose of this utility model is in order to solve the problem of above-mentioned existence, a kind of screw blade axial-flow fan to be provided.It can realize reducing noise, improves purposes such as comprehensive mechanical performance.

In order to achieve the above object, the utility model comprises rotating shaft, end cap, dividing plate and blade, it is characterized in that described blade is made to reverse spirally, and every blade total length vertically is one whole continuously.

Blade screw lift angle α scope is at 80 °-88 °.

Adopt high-strength adhesive to fix between blade and the dividing plate.

Blade quantity is in 30-40 sheet/360 °.

The utlity model has following advantage and good effect: 1, blade make reverse spiral, and be an integral body continuously vertically, in changing the working zone process over to, each blade is progressed into by an end to the other end and throws off spiral case, and certain overlap region is arranged between the adjacent blades, thereby be subjected to resistance of air even, improved the continuity of moment air-supply, reduced the impact of air-flow, improved the stability of rotating spiral case, wind-force is soft, even, has reduced noise.2, each blade is a continuous integral body vertically, and free of discontinuities has guaranteed the requirement of coaxality.3, blade and dividing plate be by the fixing one that forms of high-strength adhesive, improved its intensity (as stretch, reverse, shock resistance).4, owing to adopt an integral blade, the length of axial-flow fan can choose at random, and has expanded the design alternative of product.5, injection mold structure is simple, the yield rate height, and fault is few, bonding replacement device for ultrasonic welding, expense is low.

Below in conjunction with accompanying drawing the utility model is described in detail.

Fig. 1 is the straight formula blade of a prior art axial-flow fan plan view;

Fig. 2 is the A portion enlarged view among Fig. 1;

Fig. 3 is a prior art inclined blade axial-flow fan plan view;

Fig. 4 is the B portion enlarged view among Fig. 3;

Fig. 5 is the plan view of the utility model helical blade type axial-flow fan;

Fig. 6 is the C portion enlarged view among Fig. 5;

Fig. 7 is a screw blade torsional deformation schematic representation.

1, rotating shaft; 2, end cap; 3, dividing plate; 4, blade; 5, binder; 6, ultrasonic welding contact; α, lead angle.

Referring to Fig. 5, Fig. 6, Fig. 7, whole axial-flow fan is furnished with 35 blades 4, circumferential non-homogeneous layout.Each blade 4 total length vertically is one continuously whole, and with its by special device make reverse spiral.Lead angle α scope is between 80 °-88 °, and this enforcement side α is chosen as 86 °.In order to improve intensity, guarantee the reliability and the working life of use, between dividing plate 3 and blade 4, adopt high strength bonding agent 5 bondings fixing.Owing to adopt the structural type of spiral integral blade 4, the purpose of the noise reduction sound of realization and raising comprehensive mechanical performance.

Claims

1, a kind of screw blade axial-flow fan, it comprises rotating shaft (1), end cap (2), dividing plate (3) and blade (4), it is characterized in that described blade (4) is made to reverse spirally, every blade (4) total length vertically is one continuously whole.

2, screw blade axial-flow fan according to claim 1 is characterized in that blade (4) lead angle α scope is at 80 °-88 °.

3, screw blade axial-flow fan according to claim 1 and 2 is characterized in that adopting between blade (4) and the dividing plate (3) high-strength adhesive (5) fixing.

4, screw blade axial-flow fan according to claim 1 is characterized in that blade (4) quantity is in 30-40 sheet/360 °.