CN201148995Y - Low noise cooling fan - Google Patents
Low noise cooling fan Download PDFInfo
- Publication number
- CN201148995Y CN201148995Y CNU2008200736689U CN200820073668U CN201148995Y CN 201148995 Y CN201148995 Y CN 201148995Y CN U2008200736689 U CNU2008200736689 U CN U2008200736689U CN 200820073668 U CN200820073668 U CN 200820073668U CN 201148995 Y CN201148995 Y CN 201148995Y
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- Prior art keywords
- low noise
- cooling fan
- blade
- described blade
- noise cooling
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Abstract
The utility model provides a low noise centrifugal cooling fan and belongs to the technology field of engines. The lines of blades conform to a cubic polynomial equation or a multi-order polynomial equation and are in forward bending and backward bending arrangements, the outlet angle is controlled between 130 DEG and 150 DEG, the arrangement of the blades is in partly loose and partly tight form. The centrifugal cooling fan adopting the above structure is installed on a certain type of engine and can reduce entire noise by about 3dB on average compared with the original engine, and the cooling air quantity is slightly improved.
Description
Technical field
The utility model relates to a kind of low noise 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 and blade is contour, the uniform distribution form of spacing, about 20 of the numbers of blade, be fixed on together on the fan hub, when running up, have the high shortcoming of noise.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of centrifugal cooling fan of low noise is provided.
Low noise cooling fan of the present utility model, it comprises wheel hub and a plurality of blade, and described blade is a forward curved vane, and the basic molded lines of described blade satisfies polynomial equation more than three times or three times, the layout of described blade is taked an adjacent spaces part closely, the form that another part is sparse; The a part of closely lobe numbers of the layout interval of described blade is no less than 1/3rd, no more than 2/3rds of sum; Angular interval that described blade layout interval is sparse and the interval difference of angular interval closely are not more than 10 °; Described forward curved vane exit angle scope is between 130 °～150 °; The top of described blade is spline surface and the highest near the circumferential end face of wheel hub, and is minimum near the end face at wheel hub center.
The utility model since the blade of fan adopt the high-order moment molded lines and can effectively reduce gas noise and improve cooling air quantity to a certain extent for forward curved vane and blade layout adopt multinomial measures such as the sparse part of part is tight.
The utility model is installed on existing certain model motor, compares the reduction that former machine on average obtains 3.5dB according to the 2000/14/EC of European Union standard testing total noise of centrifuge, cooling air quantity slightly improves.
Description of drawings
Fig. 1 is the front view of low noise cooling fan of the present utility model;
Fig. 2 is the front view with fans of five order polynomial blade profiles shown in Figure 1;
Fig. 3 is the side view with fans of five order polynomial blade profiles shown in Figure 2;
Fig. 4 is the partial enlarged drawing of low noise cooling fan front view shown in Figure 1;
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in detail.
Low noise cooling fan of the present utility model as shown in drawings, it comprises wheel hub 1 and a plurality of blade 2, described blade 2 is a forward curved vane, the exit angle scope is between 130 °～150 °, optimized angle is 139.5 °, described exit angle as shown in Figure 4, it 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 O of point of contact next-door neighbour's circular arc and the supplementary angle of point of contact A line angle, the basic molded lines of described blade 2 satisfies five order polynomial equation y=AX5+BX4+CX3+DX2+EX+F, the basic model linear system of described blade 2 is counted scope respectively at A:0～3 * 10-7, B:-2.5 * 10-5～0, C:0～1.5 * 10-3, D:-7 * 10-2～0, E:0～2, between F:0～0.07, preferred value is A:1.58 * 10-7, B:-1.16 * 10-5, C:7.37 * 10-4, D:-3.82 * 10-2, E:9.11 * 10-1, F:3.5 * 10-2, the layout of described blade 2 is taked an adjacent spaces part closely, the form that another part is sparse, the a part of closely lobe numbers of the layout interval of described blade 2 is no less than 1/3rd of sum, and is no more than 2/3rds, and this value of present embodiment is got 0.5, angular interval that the blade layout interval is sparse and the interval difference of angular interval closely are not more than 10 °, and this value of present embodiment is got 2 °; Described angular interval is meant 360 ° of angle value ± deviates divided by the blade amt gained.The top of described blade 2 is spline surface and the highest near the circumferential end face of wheel hub, and is minimum near the end face at wheel hub center.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 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 (5)
1. low noise cooling fan, it comprises wheel hub and a plurality of blade, it is characterized in that: described blade is a forward curved vane, and the basic molded lines of described blade satisfies polynomial equation more than three times or three times, the layout of described blade is taked an adjacent spaces part closely, the form that another part is sparse.
2. low noise cooling fan according to claim 1 is characterized in that: described forward curved vane exit angle scope is between 130 °～150 °.
3. low noise cooling fan according to claim 2 is characterized in that: the top of described blade is spline surface and the highest near the circumferential end face of wheel hub, and is minimum near the end face at wheel hub center.
4. according to claim 2 or 3 described low noise cooling fans, it is characterized in that: a part of closely lobe numbers of the layout interval of described blade is no less than 1/3rd, no more than 2/3rds of sum.
5. according to claim 2 or 3 described low noise cooling fans, it is characterized in that: angular interval that described blade layout interval is sparse and the interval difference of angular interval closely are not more than 10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200736689U CN201148995Y (en) | 2008-01-16 | 2008-01-16 | Low noise cooling fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200736689U CN201148995Y (en) | 2008-01-16 | 2008-01-16 | Low noise cooling fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201148995Y true CN201148995Y (en) | 2008-11-12 |
Family
ID=40116763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200736689U Expired - Lifetime CN201148995Y (en) | 2008-01-16 | 2008-01-16 | Low noise cooling fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201148995Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072201A (en) * | 2011-01-27 | 2011-05-25 | 黄山市大华消防空调设备有限公司 | Fire-fighting centrifugal fan |
| CN102996504A (en) * | 2012-12-14 | 2013-03-27 | 清华大学 | Centrifugal impeller flow passage design method for controlling slope distribution |
| CN103452869A (en) * | 2012-05-28 | 2013-12-18 | 台达电子工业股份有限公司 | Centrifugal fan with axial flow wind direction |
| CN103807208A (en) * | 2012-11-08 | 2014-05-21 | 英业达科技有限公司 | Fan blade structure |
| CN104564808A (en) * | 2014-04-11 | 2015-04-29 | 林钧浩 | Down-flow pressurizing energy-saving fan |
| CN108005950A (en) * | 2018-01-30 | 2018-05-08 | 清华大学 | The impeller and its design method of vane-type oil-gas mixing pump |
| CN110112856A (en) * | 2019-04-24 | 2019-08-09 | 安徽皖南新维电机有限公司 | Fish material vehicula motor |
| CN111120067A (en) * | 2019-12-26 | 2020-05-08 | 重庆隆鑫机车有限公司 | Cooling fan, air cooling system and engine |
-
2008
- 2008-01-16 CN CNU2008200736689U patent/CN201148995Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072201A (en) * | 2011-01-27 | 2011-05-25 | 黄山市大华消防空调设备有限公司 | Fire-fighting centrifugal fan |
| CN103452869A (en) * | 2012-05-28 | 2013-12-18 | 台达电子工业股份有限公司 | Centrifugal fan with axial flow wind direction |
| CN103452869B (en) * | 2012-05-28 | 2016-08-17 | 台达电子工业股份有限公司 | The centrifugal fan of tool axial flow wind direction |
| CN103807208A (en) * | 2012-11-08 | 2014-05-21 | 英业达科技有限公司 | Fan blade structure |
| CN102996504A (en) * | 2012-12-14 | 2013-03-27 | 清华大学 | Centrifugal impeller flow passage design method for controlling slope distribution |
| CN102996504B (en) * | 2012-12-14 | 2015-06-10 | 清华大学 | Centrifugal impeller flow passage design method for controlling slope distribution |
| CN104564808A (en) * | 2014-04-11 | 2015-04-29 | 林钧浩 | Down-flow pressurizing energy-saving fan |
| CN108005950A (en) * | 2018-01-30 | 2018-05-08 | 清华大学 | The impeller and its design method of vane-type oil-gas mixing pump |
| CN108005950B (en) * | 2018-01-30 | 2024-04-09 | 清华大学 | Impeller of vane type oil-gas mixed transportation pump and design method thereof |
| CN110112856A (en) * | 2019-04-24 | 2019-08-09 | 安徽皖南新维电机有限公司 | Fish material vehicula motor |
| CN111120067A (en) * | 2019-12-26 | 2020-05-08 | 重庆隆鑫机车有限公司 | Cooling fan, air cooling system and engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081112 |
|
| CX01 | Expiry of patent term |