CN201818548U

CN201818548U - Low noise fan blade of cooling fan

Info

Publication number: CN201818548U
Application number: CN2010205591274U
Authority: CN
Inventors: 马宝发
Original assignee: CHANGCHUN RI YONG - JEA GATE ELECTRIC Co Ltd; Shanghai Malu Riyong-Jea Gate Electric Co Ltd; Shanghai Ri Yong Jea Gate Electric Co Ltd
Current assignee: CHANGCHUN RI YONG - JEA GATE ELECTRIC Co Ltd; Shanghai Malu Riyong-Jea Gate Electric Co Ltd; Shanghai Ri Yong Jea Gate Electric Co Ltd
Priority date: 2010-10-13
Filing date: 2010-10-13
Publication date: 2011-05-04
Anticipated expiration: 2020-10-13

Abstract

The utility model provides a low noise fan blade of a cooling fan, wherein the low noise fan blade comprises a wheel hub, blades and a wind protective ring which are integrated into one piece. The low noise fan blade, a motor and a wind protective cover form a fan assembly via a coupling device. The number of the blades is seven, and the seven blades are distributed at an unequal distance at an angle of 50.9 DEG, 51.8 DEG, 51.3 DEG, 52.1 DEG, 50.8 DEG and 51.3 DEG in order along the anticlockwise direction. Compared with a fan blade with a ring in the prior art, the low noise fan blade of the cooling fan of the utility model lowers the noise value and obviously enhances the subjective human ear comfortableness.

Description

The low noise fan blade of cooling fan

Technical field

The utility model relates to a kind of fan, relates in particular to a kind of low noise fan blade of cooling fan.

Background technique

The fan blade that the cooling fan that uses in vapour (sedan-chair) car at present adopts is divided into band fan blade and band fan blade not on the structure, be divided into prismatic blade and bent blades on the blade profile.

Along with developing of automobile industry, people are more and more higher for the requirement of automobile function, not only pursue outward appearance, more pay attention to its internal quality and travelling comfort.For cooling fan for cars, its air quantity and noise are main performance index, and often demand is under certain working condition in car load manufacturing enterprise, and fan has higher air quantity and lower power consumpiton, this just requires fan that higher efficient is arranged, and requires fan that lower noise is arranged again simultaneously.And along with the progress of science and technology, there has been more requirement in each car load manufacturing enterprise to noise quality now, not only requires global noise low, and requires on noise spectrum, and the noise difference of successive bands can not surpass certain limit value.

What a kind of fan product of prior art used is a kind of fan blade of 6 uniform bands of blade, and when high speed rotating was worked, noise decibel numerical value was higher and people's ear subjective comfort is relatively poor.

The model utility content

The purpose of this utility model in order to provide a kind of under the situation that satisfies the fan flow performance, can reduce noise exactly, improves the low noise fan blade of the cooling fan of acoustical mass.

In order to achieve the above object, the utility model has adopted following technological scheme: a kind of low noise fan blade of cooling fan, by wheel hub, blade with protect vane and form one, by hitch bar and motor and wind shelling cover composition fan assembly, be characterized in, described blade is seven, and seven blades are not equally spaced, and distribution angle is by counterclockwise being followed successively by 50.9 °, 51.8 °, 51.3 °, 52.1 °, 50.8 ° and 51.3 °.

Described blade adopts forward inclined type, equidistantly get 11 Cross section Design from interior radial outer diameter, 11 cross sections are followed successively by 0 ° ,-0.245 ° ,-0.122 °, 0.146 °, 0.668 °, 1.744 °, 3.219 °, 5.188 °, 8.437 °, 12.383 ° and 16.186 ° from the bend angle of interior radial outer diameter; 11 cross sections are followed successively by 35.29 °, 32.38 °, 29.92 °, 27.82 °, 26.02 °, 24.45 °, 23.08 °, 21.87 °, 20.80 °, 19.84 ° and 18.97 ° from the setting angle of interior radial outer diameter; 11 cross sections are followed successively by 50.82mm, 52.87mm, 54.62mm, 56.15mm, 57.50mm, 58.72mm, 59.83mm, 60.85mm, 61.80mm, 62.69mm and 63.52mm from the chord length in the blade radius cross section of interior radial outer diameter.

The blade profile relative thickness of described blade is 5% by 6% transition, and the blade profile trailing edge is made rounding and handled.

The low noise fan blade of cooling fan of the present utility model has been owing to adopted above technological scheme, have following advantage and and characteristics:

1, blade adopts the odd number sheet not to be equally spaced, and can not only reduce the numerical value of noise, has more optimized the level of comfort of noise.

2, blade adopts the forward inclined type structure, by suitable antecurvature angle, has not only improved the intensity of blade, can also play the effect of optimizing the flow field and reducing noise.

3, adopted at vane tip and protected the solar or lunar halo structure, improved blade strength, overcome when high speed rotating, the bigger variation of the blade radially stretching antecurvature angle that causes and vane airfoil profile established angle under centrifugal action can guarantee that the ride quality of fan blade does not have big variation.Owing to protect the support reinforcing effect of solar or lunar halo, the irregular chatterin of blade when having overcome rotation has been avoided having optimized the level of comfort of sound owing to blade is shaken the extraordinary noise that causes simultaneously.

Description of drawings

Fig. 1 is the basic structure schematic representation of the low noise fan blade of the utility model cooling fan;

Fig. 2 is the setting angle and the cross section chord length schematic representation in 11 cross sections of the blade in the utility model.

Concrete form of implementation

Referring to Fig. 1, the low noise fan blade of the utility model cooling fan, by wheel hub 1, blade 2 with protect vane 3 and form one, fan blade is the integral molded plastic goods, blade 2 Ye Dingchu with protect vane 3 and be connected, the place is connected with wheel hub 1 blade root, and shaft coupling structure 4 is arranged on the wheel hub.Motor shaft is connected with fan blade by shaft coupling structure 4, drives the fan blade rotation and carries air.

For improving the acoustics performance of fan blade, the blade in the utility model is seven, and seven blades are not equally spaced, and distribution angle is by counterclockwise being followed successively by 50.9 °, 51.8 °, 51.3 °, 52.1 °, 50.8 ° and 51.3 °.Shown in the A1 among Fig. 1.

For noise reduction and improve the intensity of blade, blade in the utility model adopts forward inclined type, and 11 cross sections are followed successively by 0 ° ,-0.245 ° ,-0.122 °, 0.146 °, 0.668 °, 1.744 °, 3.219 °, 5.188 °, 8.437 °, 12.383 ° and 16.186 ° from the bend angle of interior radial outer diameter.Shown in the A2 among Fig. 1.

Cooperation is referring to Fig. 2, for obtaining stable flow field, and can move under the highest static pressure efficiency down in the operating mode (static pressure, flow) of appointment, and fan blade adopts and becomes the circular rector flow pattern, makes total head increase and make full use of the acting of leaf top along radius, and reduces the blade root load.11 cross sections are followed successively by 35.29 °, 32.38 °, 29.92 °, 27.82 °, 26.02 °, 24.45 °, 23.08 °, 21.87 °, 20.80 °, 19.84 ° and 18.97 ° from the setting angle of interior radial outer diameter; 11 cross sections are followed successively by 50.82mm, 52.87mm, 54.62mm, 56.15mm, 57.50mm, 58.72mm, 59.83mm, 60.85mm, 61.80mm, 62.69mm and 63.52mm from the chord length in the blade radius cross section of interior radial outer diameter.

The blade profile relative thickness of the blade in the utility model is 5% by 6% transition, and the blade profile trailing edge is made rounding and handled, and is both easy to process, can improve the flow field at the trailing edge place again.

The key data of the blade in the utility model is as shown in table 1.

Table 1

Claims

1. the low noise fan blade of a cooling fan, by wheel hub, blade with protect vane and form one, by hitch bar and motor and wind shelling cover composition fan assembly, it is characterized in that: described blade is seven, seven blades are not equally spaced, and distribution angle is by counterclockwise being followed successively by 50.9 °, 51.8 °, 51.3 °, 52.1 °, 50.8 ° and 51.3 °.

2. the low noise fan blade of cooling fan as claimed in claim 1, it is characterized in that: described blade adopts forward inclined type, equidistantly get 11 Cross section Design from interior radial outer diameter, 11 cross sections are followed successively by 0 ° ,-0.245 ° ,-0.122 °, 0.146 °, 0.668 °, 1.744 °, 3.219 °, 5.188 °, 8.437 °, 12.383 ° and 16.186 ° from the bend angle of interior radial outer diameter; 11 cross sections are followed successively by 35.29 °, 32.38 °, 29.92 °, 27.82 °, 26.02 °, 24.45 °, 23.08 °, 21.87 °, 20.80 °, 19.84 ° and 18.97 ° from the setting angle of interior radial outer diameter; 11 cross sections are followed successively by 50.82mm, 52.87mm, 54.62mm, 56.15mm, 57.50mm, 58.72mm, 59.83mm, 60.85mm, 61.80mm, 62.69mm and 63.52mm from the chord length in the blade radius cross section of interior radial outer diameter.

3. the low noise fan blade of cooling fan as claimed in claim 1, it is characterized in that: the blade profile relative thickness of described blade is 5% by 6% transition, the blade profile trailing edge is made rounding and is handled.