CN205331054U

CN205331054U - Axial -flow fan with many curved surfaces type blade

Info

Publication number: CN205331054U
Application number: CN201620093823.8U
Authority: CN
Inventors: 户伟林; 马少辉; 连铁杰; 安庆刚; 韩旭生
Original assignee: HANDAN CITY DONGFANG FAN MANUFACTURING Co Ltd
Current assignee: HANDAN CITY DONGFANG FAN MANUFACTURING Co Ltd
Priority date: 2016-01-29
Filing date: 2016-01-29
Publication date: 2016-06-22
Anticipated expiration: 2026-01-29

Abstract

The utility model discloses an axial -flow fan with many curved surfaces type blade, the fan includes the wheel hub who is connected with the rotation axis, set up many curved surfaces of a plurality of type blade through the petiole symmetry on wheel hub's the periphery, blade retention connects in the tip of petiole, the root of petiole and wheel hub's outer wall fixed connection, the utility model discloses optimized leaf structure, reduced the fan in the time of increase axial fan intake and rotate the noise that the in -process produced.

Description

Axial fan with many curved face types blade

Technical field

This utility model relates to fan manufacturing technology field, especially a kind of axial fan with many curved face types blade。

Background technology

The blower fan type used in current commercial production is mainly axial-flow type and centrifugal two kinds of blower fans, being mainly used in the place ventilations such as metallurgy, chemical industry, food, plant equipment and civil buildings or strengthen the use of heat radiation, relatively conventional blower fan is axial fan。

The blade of axial flow blower of the prior art is generally adopted the straight plate of thickness uniform shapes rule and makes, the blade of varying number is fixed on wheel hub with angle in certain distance, when impeller rotates under driven by motor, wind easily flows out from blade edge, and the energy making distinguished and admirable acquisition is low, thus causing that the air quantity of axial flow blower is less, inefficient, noise during axial fan operating simultaneously is bigger, it is necessary to take noise countermeasure, and this is accomplished by strengthening dynamics of investment and cost of manufacture。

Utility model content

This utility model technical issues that need to address are to provide a kind of axial flow blower with many curved face types blade, it is possible to reduce, while increasing axial flow blower intake, the noise produced in blower fan rotation process。

For solving above-mentioned technical problem, this utility model be the technical scheme is that

Axial fan with many curved face types blade, described blower fan includes the wheel hub being connected with rotating shaft, being symmetrical arranged several many curved face types blades by petiole on the periphery of described wheel hub, described blade is fixedly connected on the end of petiole, and the root of described petiole is fixing with the outer wall of wheel hub to be connected。

Further, the transverse cross-sectional shape of described blade is spindle and blade is hollow structure, in blade the wing chord of the wing chord of blade root section and blade tip section not in the same plane in。

Further, the angle α between wing chord and the air intake direction of described blade root section is 29 °～32 °。

Further, the angle β between wing chord and the air intake direction of described blade tip section is 70 °～73 °。

Further, described blade is to be welded, by leading edge along blade of upper impeller and lower impeller and trailing edge, the integrative-structure formed。

Further, the air intake end face of described wheel hub is fixing connects cover plate, between described cover plate and wheel hub, between blade and petiole, is connected each through bolt between petiole and the outer wall of wheel hub。

Owing to have employed technique scheme, have the beneficial effects that produced by this utility model:

This utility model is that the blade to axial flow blower improves, and optimizes the structure of blade, improves the efficiency conversion ratio of blower fan。Main technological improvement point is in that: original straight-plate-type blade is designed to many curved face types blade, and between blade root and the blade tip of many curved face types blade, design has certain torsion angle simultaneously, makes whole blade more meet aerodynamic demands；The blade angle that arranges on wheel hub cylinder is optimized, angle α between wing chord and the air intake direction of blade root section is 29 °～32 °, angle β between wing chord and the air intake direction of blade tip section is 70 °～73 °, can strengthen in rotation process wind action power, reduce windage, so that distinguished and admirable acquisition relatively multi-energy, the noise of axial flow blower can also be reduced simultaneously。

Accompanying drawing explanation

Fig. 1 is front view of the present utility model；

Fig. 2 is partial sectional view of the present utility model；

Fig. 3 is blade twist structural representation of the present utility model；

Fig. 4 is blade axonometric chart of the present utility model；

Fig. 5 is the structural representation of petiole of the present utility model；

Wherein, 1, wheel hub, 2, cover plate, 3, blade, 3-1, blade root, 3-2, blade tip, 3-3, upper impeller, 3-4, lower impeller, 4, petiole, A, air intake direction。

Detailed description of the invention

Below in conjunction with embodiment, this utility model is described in further details:

As shown in Figures 1 to 5, axial fan with many curved face types blade of the present utility model, including wheel hub 1, cover plate 2, blade 3 and petiole 4, blade 3 is arranged on the periphery of wheel hub, the quantity of wheel hub blade, the specific size needing the diameter according to wheel hub 1 sets, in wheel hub 1, hub axle sleeve is set, it is connected for the rotating shaft with blower fan, the air intake end face of wheel hub 1 is fixing connects cover plate 2, with bolt, petiole 4 and blade 3 are secured together after petiole 4 is placed in the inner chamber of blade 3, and the root of petiole 4 is fixed through wheel hub 1 wall thickness nut, loosening to prevent petiole from occurring adopts double nut and jackscrew to reinforce。

Blade 3 of the present utility model is many curved face types blade, including blade root 3-1, blade tip 3-2, upper impeller 3-3 and lower impeller 3-4, it is welded, by the upper impeller 3-3 and the lower impeller 3-4 leading edge along blade and trailing edge, the integrative-structure formed, the transverse cross-sectional shape of blade 3 is spindle and blade 3 is hollow structure, it is the leading edge of blade 3 between front end and the front end of blade tip 3-2 of blade root 3-1, is the trailing edge of blade 3 between rear end and the rear end of blade tip 3-2 of blade root 3-1。

Angle α between wing chord and the air intake direction of the blade root 3-1 section of this utility model blade 3 is set to be 29 °～32 °, angle β between wing chord and the air intake direction of blade tip section is set to 70 °～73 °, wherein the wing chord of blade root 3-1 section is the line between front end and the rear end of blade root 3-1 section, the wing chord of blade tip 3-2 section is the line between front end and the rear end of blade root 3-1 section, in blade 3 wing chord of the wing chord of blade root 3-1 section and blade tip 3-2 section not in the same plane in。

When axial fan rotates under the drive of motor, air is under the promotion of blade, increase the intake of axial flow blower, reduce the resistance of ventilating air, improve the trans-utilization rate of efficiency, additionally the edge of the blade of this utility model design is with arc, reduces the air-supply noise of axial flow blower, alleviate the air-flow resistance to blade, reduce the power consumption of axial flow blower。

Claims

1. with the axial fan of many curved face types blade, described blower fan includes the wheel hub (1) being connected with rotating shaft, it is characterized in that: the periphery of described wheel hub (1) is symmetrical arranged several many curved face types blades (3) by petiole (4), described blade (3) is fixedly connected on the end of petiole (4), and the root of described petiole (4) is fixing with the outer wall of wheel hub (1) to be connected。

2. the axial fan with many curved face types blade according to claim 1, it is characterized in that: the transverse cross-sectional shape of described blade (3) is spindle and blade (3) is hollow structure, in blade (3) wing chord of the wing chord of blade root (3-1) section and blade tip (3-2) section not in the same plane in。

3. the axial fan with many curved face types blade according to claim 2, it is characterised in that: the angle α between wing chord and the air intake direction of described blade root (3-1) section is 29 °～32 °。

4. the axial fan with many curved face types blade according to claim 2, it is characterised in that: the angle β between wing chord and the air intake direction of described blade tip (3-2) section is 70 °～73 °。

5. the axial fan with many curved face types blade according to claim 2, it is characterised in that: described blade (3) is to be welded, by leading edge along blade (3) of upper impeller (3-3) and lower impeller (3-4) and trailing edge, the integrative-structure formed。

6. the axial fan with many curved face types blade according to any one of Claims 1 to 5, it is characterized in that: the air intake end face of described wheel hub (1) is fixing connects cover plate (2), between described cover plate (2) with wheel hub (1), between blade (3) and petiole (4), is connected each through bolt between petiole (4) and the outer wall of wheel hub (1)。