CN2040555U

CN2040555U - Adjustable wide-angle fan

Info

Publication number: CN2040555U
Application number: CN 88204300
Authority: CN
Inventors: 陈天材; 陈天时
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-04-25
Filing date: 1988-04-25
Publication date: 1989-07-05

Abstract

The utility model discloses an adjustable wide-angle fan used for an axial-flow fan, in particular to being used for a domestic electric fan and a cooling fan for an internal-combustion engine. The utility model is characterized in that a centrifuge blade (2) is twisted or assembled on an axial flow blade (1). The utility model has the advantages of simple manufacturing process, low cost and little change for the shape of the prime fan blade, and the adjustable wide-angle fan is provided with a structure used for users to adjust the taper of airflow. The adjustable wide-angle fan has large function area, providing wide-angle shape continuous and soft wind, and the distribution of cooled air current of the internal-combustion engine is improved to be more reasonable.

Description

Adjustable wide-angle fan

Be used for axial flow fan, especially for domestic electric fan and IC. engine cooling fan.

The axial flow fan of extensive use now, the air-flow that is produced are cylinder shaft body shape parallel blow out approximate with the fans external diameter, and its active area is little, and air-flow is intensive.

Application number is 85204422 " full blast electric fan ", is a kind of fan that can produce the big wind of active area, but its flabellum shape is comparatively complicated.

The purpose of this utility model provides that a kind of alteration of form to existing fans is little, and technology is simple, also can have the fan that can produce wide-angle wind of being regulated the air-flow tapered configuration by the user voluntarily.

The utility model technical solution is: a kind of combination fan leaf, be by axial blade and the centrifugal blade that can produce radial air flow, the combination fan leaf of making by technologies such as welding, castings, the angle of attack of centrifugal blade is 10 °-30 °, and can be in the air intake surface and the outlet air surface of axial blade, or both combine.The utility model feature is: go up distortion or assembling centrifugal blade (2) at axial blade (1).

The utility model technical solution is: have two centrifugal blades (2) at least.

The utility model technical solution is: centrifugal blade (2) can be in the same one side of axial blade (1).

The utility model technical solution is: centrifugal blade (2) can be in same limit of axial blade (1).

The utility model technical solution is: the width of centrifugal blade (2) is less than 1/2nd of axial blade width.

The utility model technical solution is: described assembling centrifugal blade (2) can be the structure of can regulate or replaceable different size.

The advantage that the utility model had is: since a welding, casting etc. than complicated technology, change distortion into, assemble better simply technology, adopt the centrifugal blade (2) of short multi-disc, make it be distributed in axial blade (1) edge or middle part, so it is simple to the utlity model has technology, alteration of form to axial blade is little, the advantage that can keep former fan to have preferably, but also have the structure that can regulate the air-flow tapering by the user voluntarily.

Fig. 1 and Fig. 2 are the schematic representation that the air intake limit distortion of axial blade (1) forms centrifugal blade (2), and angle α is the angle of attack of centrifugal blade.Fig. 3 goes up modes such as adopting bolt at axial blade (1) to assemble the schematic representation of centrifugal blade group (2), and centrifugal blade group (2) is to amplify 3 times of draftings.5 stains on the axial blade (1) are represented alternative pilot hole.Fig. 4 is the schematic representation of pegging graft mutually, and the centrifugal blade that three-view diagram is represented (2) is to amplify 4 times of draftings, and Fig. 3 and Fig. 4 have can regulate and removable structure.

I form 2cm in the distortion of the top, axial blade air intake limit of horizontal wide 9cm ²Centrifugal blade, the air-flow tapering of surveying its when running is about 50 °, as civilian electric fan it will be argued that 50 ° comparatively suitable, cross conference because of tapering and cause wind-force too small, otherwise expanded motor power.

Centrifugal blade is in air intake limit, top margin, air-out edge, be in air intake surface or outlet air surface, and the angle of attack, area, position select to such an extent that decide according to concrete needs, can be selected by test, such as the required like this area of the top margin that is in axial blade (1) and angle of attack minimum all.If do not enlarge former fans running space and adopt the air intake that is in outlet air surface better.

The mode that also can adopt fixing centrifugal blade to combine with adjustable centrifugal blade, the effect that the utility model and oscillating mechanism share is also more satisfactory.

The structure of Fig. 1 is fit to IC. engine cooling fan, ceiling fan etc.

Fig. 2 is that twisted shape number in blocks is many, and area is little, and area is not an every all identical schematic representation with angle.

Fig. 3 is for hole axial blade (1), and Fig. 6 is that centrifugal blade (2) is to make both with bolts assemblies together with composite such as plastics or sheet metal, and sectional view Fig. 6 amplifies 3 times of draftings, and Fig. 7 is the left view of Fig. 6.

Fig. 4 is the axial blade (1) with bar v notch v, and three-view diagram Fig. 5 adopts to have certain elasticity or heat the centrifugal blade (2) that back rubber-like plastics class composite is made, and both adopt the mode of grafting to assemble easily.

Fig. 3 and Fig. 4 have simple load and unload advantage, so change area, the sheet number of centrifugal blade (2) easily, angle and with the distance of the garden heart, its objective is the ratio of regulating radial air flow intensity that centrifugal blade (1) produced and axial flow intensity, to reach the air-flow tapering that needs.

Behind complete removal centrifugal blade (2), can also recover the function of former axial fan.

On the fans of 4 leaves or 6 leaves, also can only have centrifugal blade, so also can obtain different air-flows and distribute at a pair of of symmetry or two pairs of axial blades.

Claims

1, a kind of wide-angle adjustable fan that produces wide-angle shape air-flow, its flabellum are to be combined by axial fan blade (1) and centrifugal blade (2), it is characterized in that: go up distortion at axial blade (1) and form or assemble centrifugal blade (2).

2, according to the described fan of claim 1, it is characterized in that: on same axial blade, have two centrifugal blades (2) at least.

3, according to the described fan of claim 2, it is characterized in that: centrifugal blade (2) can be in the same one side of axial blade (1).

4, according to the described fan of claim 2, it is characterized in that: centrifugal blade (2) can be in same limit of axial blade (1).

5, according to the described fan of claim 2, it is characterized in that: the centrifugal blade width is less than 1/2nd of axial blade (1) width.

6, according to the described fan of claim 1-5, it is characterized in that: described assembling centrifugal blade (2) is to adopt the mode of bolt or grafting that centrifugal blade (2) is fixed on the axial blade.