CN2214555Y

CN2214555Y - Electrical fan vane

Info

Publication number: CN2214555Y
Application number: CN 94223674
Authority: CN
Inventors: 张敏郎
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-10-08
Filing date: 1994-10-08
Publication date: 1995-12-06
Anticipated expiration: 2004-10-08

Abstract

The utility model relates to electrical fan vanes, comprising a plurality of vanes and a shaft body. The basal parts of the vanes are mutually parallel with a definite inclined angle and are provided annularly with equal distance on the annular surface of the shaft body. The thickness of each of the vanes is gradually thickened from the front end of the vane to the tail end of the vane. The arc end edge of the tail end of each vane is concavely provided with a notch, which can effectively strengthen the torsion strength of the vane in order to reduce the load of a rotating motor, to improve the running efficiency, and to increase air output.

Description

Electrical fan vane

The utility model relates to a kind of fan blade of improvement, and the structural design of especially relevant a kind of plastic blade is improved at its twisting strength.

Electric fan of a great variety, and no matter be upright fan, desk fan or wall fan, it becomes indispensable articles for use in the daily life already, in energy deficiency again in the surging modern society of environmental consciousness, electric fan undoubtedly will in daily life, continue to play the part of its important role, and how to promote its function of use and efficient, for making great efforts the important goal of research and development between this industry.

See also shown in Figure 1, vane frame for general electric fan commonly used, include three fan-shaped blades 2 and an annular axis body 1, axis body 1 center is provided with an axostylus axostyle 5, when making fan motor start axostylus axostyle 5 rotation, can drive vane frame and rotate synchronously, the base portion of blade 2 system is located on the anchor ring of axis body 1 between being parallel to each other etc. with a gradient, and the thickness of whole blade 2 then is the design of a uniform thickness.

When motor drives the vane frame rotation, blade 2 is involved in air by blade front end 3 clockwise directions immediately, and form a directed airflow flowing, this moment, 4 of blade tail ends were because of being subjected to reaction force bearing the formed pressure of generation air-flow, when motor rotary speed strengthens, the reaction pressure that blade tail end 4 bore then is directly proportional relatively and increases, and can force blade tail end 4 to flatten backward, and general fan blade 2 big polyphylys are made with plastic product, its twisting strength is less, press and make blade 2 gradually when straight when blade tail end 4 is forced to the back, its air quantity then reduces relatively, and the operating load of motor then increases relatively so that efficient lowers.

The purpose of this utility model is that the shortcoming at aforementioned blade commonly used is improved, and a kind of fan blade of promoting twisting strength is provided.

Fan blade of the present utility model includes some blades and an axis body, the base portion of blade system is located on the anchor ring of axis body between being parallel to each other etc. with a gradient, and the thickness of blade system is thickeied toward the blade tail end gradually by the blade front end of incision air, and establish a breach in tail end arc ora terminalis fovea superior, make the twisting strength of its energy efficient hardening blade, to alleviate the load of motor running, increase air output and improve running efficiency.

For further specifying structure of the present utility model, feature and practical purpose thereof are described in detail as follows in conjunction with following accompanying drawing:

Figure 1A to 1C is the front view, right elevation of vane frame commonly used and along the sectional view of A-A ' line;

Fig. 2 A to 2C is the front view, right elevation of the utility model vane frame and along the sectional view of B-B ' line.

See also shown in Figure 2, vane frame for the utility model fan blade, include three fan-shaped blades 21 and an annular axis body 1, axis body 1 center is connected with an axostylus axostyle 5, so that when making fan motor drive shaft rod 5 rotation, can drive vane frame and rotate synchronously, the base portion system of blade 21 is located on the anchor ring of axis body 1 between being parallel to each other etc. with a gradient, and the thickness of blade 21 system is thickeied toward blade tail end 4 gradually by the blade front end 3 of incision air, and is arranged with a breach 6 on blade tail end 4 ora terminalis.

When motor drives the vane frame rotation, the tail end 4 of blade 21 is as aforementioned blade 2 commonly used, because of the formed pressure of generation air-flow is being born in the extrusion that is subjected to reaction force, when motor rotary speed strengthens, the reaction pressure that blade tail end 4 bore then is directly proportional and increases relatively, this moment blade 21 thickness because of being gradually toward tail end 4 thickening by front end 3, so what its twisting strength was commonly used is big, can effectively prevent to make blade 2 gradually in straight because of blade tail end 4 pressurizeds, and be concaved with a breach 6 on blade tail end 4 ora terminalis, can make the air current flow of blade tail end 4 more smooth and easy, so its air quantity can strengthen (laboratory data that please refer to following tabular) with the acceleration of motor rotary speed, the operating load of motor then reduces relatively to raise the efficiency.

	The blade external diameter	Input voltage	Consumed power	Motor rotary speed	Wind speed range finding 50CM
						Blade commonly used	6 inches	DC6V	0.43A	2300RPM	3.9M/ second
The utility model blade	6 inches	DC6V	0.4A	2500RPM	4.3M/ second

In sum, fan blade of the present utility model has all shortcoming of improvement fan blade commonly used, and makes it have the multiple benefit of promoting twisting strength and reducing motor load, is a progressive model utility design in fact.

Claims

A kind of fan blade, include some blades and an axis body, the base portion of blade system is parallel to each other with a gradient and is located on the anchor ring of axis body between waiting, and it is characterized in that: the thickness system of blade is thickeied gradually by the blade tail end of cutting air, and establishes a breach in blade tail end arc ora terminalis fovea superior.