CN201176959Y

CN201176959Y - Double-vane cooling fan

Info

Publication number: CN201176959Y
Application number: CNU200820073666XU
Authority: CN
Inventors: 高宏阁; 林漫群; 景亚兵; 朱敬锋; 程晓鸣
Original assignee: TIANJIN INTERNAL-COMBUSTION ENGINE INST
Current assignee: TIANJIN INTERNAL-COMBUSTION ENGINE INST
Priority date: 2008-01-16
Filing date: 2008-01-16
Publication date: 2009-01-07
Anticipated expiration: 2018-01-16

Abstract

The utility model provides a double-blade cooling fan, which belongs to the engine technical field. A primary group of blades and a secondary group of blades are adopted, the secondary blades are arranged between the two primary blades, and the shape lines of the primary and secondary blades can be both described by arcs or cubic polynomial equations or above. The double-blade cooling fan which is arranged on an engine of certain type can reduce noise averagely by about 2dB than the original engine, and the cooling air quantity is slightly improved.

Description

The double-leaf cooling fan

Technical field

The utility model relates to a kind of double-leaf cooling fan, relates in particular to a kind of centrifugal cooling fan that is used on the motor.

Background technique

At present, along with the requirement of various countries' legislations for noise is constantly strict, the problem that motor in use exists noise to exceed standard more and more is subjected to people and payes attention to.And turbulence noise and the interaction noise that produces that run up of the cooling fan on the motor is exactly a main noise source, and these two kinds of noises and flabellum molded lines, blade layout type are closely related.That the flabellum of centrifugal cooling fan is broadly divided into is antecurvature, three kinds of palintrope and prismatic blades, and the centrifugal cooling fan great majority on the motor adopt backward leaning vane, about 20 of the numbers of blade are fixed on the fan hub together, and blade profile is single, have the high shortcoming of noise when running up.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of double-leaf cooling fan is provided.

Double-leaf cooling fan of the present utility model, it comprises wheel hub and a plurality of blade, described blade can be divided into major-minor two class blades, described back blades is installed between two primary blades, all available circular arc of described major and minor vane type line and polynomial equation description more than three times or three times, the height of described back blades, chord length all are lower than 1/3rd of described primary blades analog value; The minimum separable of the adjacent nearest primary blades with it of described back blades and the ratio of two adjacent primary blades minimum separables are between 0.1～0.5; Described primary blades sweepback angle scope is between 50 °～70 °, and described primary blades inlet angle scope is between 25 °～45 °.

The utility model can effectively reduce gas noise and improve cooling air quantity to a certain extent owing to employing has fairshaped major-minor blade.

The utility model is installed on existing certain model motor, compares reduction and the cooling air quantity that former machine on average obtains 2dB according to the 2000/14/EC of European Union standard testing total noise of centrifuge and slightly improve.

Description of drawings

Fig. 1 is the front view of double-leaf cooling fan of the present utility model;

Fig. 2 is the partial enlarged drawing with cooling fan plan view of major-minor blade shown in Figure 1;

Fig. 3 is the side view of the partial enlarged drawing of the cooling fan plan view with major-minor blade shown in Figure 2;

Fig. 4 is the partial enlarged drawing with cooling fan plan view of major-minor blade shown in Figure 2;

Fig. 5 is the partial enlarged drawing with cooling fan plan view of major-minor blade shown in Figure 2;

Embodiment

Below in conjunction with the drawings and specific embodiments the present invention is done to describe in detail.

Double-leaf cooling fan of the present utility model as shown in drawings, it comprises wheel hub 1 and a plurality of blade, described blade can be divided into main 2 secondary 3 liang of class blades, described primary blades 2 molded lines are circular arc from beginning to end, the middle part is cubic polynomial equation: Y=AX3+BX2+CX+D, the smooth overlap joint of three parts, primary blades 2 sweepback angle 6 scopes are between 50 °～70 °, for present embodiment preferred 58.12 °, described sweepback angle 6 is meant on the tangent line of the wheel hub contour that the intersection point A with blade centreline and wheel hub contour is done and the blade centreline and the center of circle O1 of point of contact A next-door neighbour's circular arc and the angle of point of contact A line, inlet angle 7 scopes are between 25 °～45 °, for present embodiment preferred 36.55 °, described inlet angle 7 is meant end points D and the center of circle 02 line of D point place circular arc and the angle of wheel hub center and blade centreline terminal point A line near the blade centreline at wheel hub center, back blades 3 molded lines can be identical with primary blades, the also curve of the above polynomial equation description in three rank or three rank, back blades 3 is installed between two primary blades 2, blade height, chord length all is lower than 1/3rd of primary blades 2 analog values, the minimum separable of the adjacent nearest primary blades 2 with it of described back blades 3 and the ratio of two adjacent primary blades 2 minimum separables are between 0.1～0.5, for present embodiment preferred 0.19; In described primary blades 2 molded lines near central angle 5 scopes of the circular arc of wheel hub core between 25 °～45 °, preferred 35.1 ° for present embodiment; In described primary blades 2 molded lines away from central angle 4 scopes of the circular arc of wheel hub core between 25 °～45 °, preferred 30.3 ° for present embodiment; The coefficient scope of described primary blades 2 molded lines intermediate portion cubic polynomials is respectively at A:0～2 * 10-3, B:-0.1～0, C:0～1.75, between D:-0.25～0, for the preferred A:1.11 * 10-3 of present embodiment, B:-5.41 * 10-2, C:0.865, D:-0.11.Described blade 2 and wheel hub 1 can adopt nonmetal or metallic material is made, and make as polypropylene (pp) material or cast aluminium alloy, have intensity height, cheap advantage, and blade and wheel hub can one poly-mould or cast form.

Because motor wind scooper profile is subjected to the complete machine arrangement constraints, gas forms in wind scooper and squeezes stream, the gas interaction noise is often very big, and the wind scooper profile is difficult to change, fan is influenced by cooling air quantity again, be difficult for whole minification, adopt major-minor blade of the present utility model and distribution form can effectively reduce gas noise and also improve cooling air quantity to a certain extent.

Claims

1. double-leaf cooling fan, it comprises wheel hub and a plurality of blade, it is characterized in that: described blade can be divided into major-minor two class blades, and described back blades is installed between two primary blades, all available circular arc of described major and minor vane type line and polynomial equation description more than three times or three times.

2. double-leaf cooling fan according to claim 1 is characterized in that: described primary blades sweepback angle scope is between 50 °～70 °.

3. double-leaf cooling fan according to claim 2 is characterized in that: described primary blades inlet angle scope is between 25 °～45 °.

4. double-leaf cooling fan according to claim 3 is characterized in that: the height of described back blades, chord length all are lower than 1/3rd of described primary blades analog value.

5. double-leaf cooling fan according to claim 4 is characterized in that: the minimum separable of the adjacent nearest primary blades with it of described back blades and the ratio of two adjacent primary blades minimum separables are between 0.1～0.5.