CN101311551A - Cooling fan - Google Patents
Cooling fan Download PDFInfo
- Publication number
- CN101311551A CN101311551A CNA2008101088090A CN200810108809A CN101311551A CN 101311551 A CN101311551 A CN 101311551A CN A2008101088090 A CNA2008101088090 A CN A2008101088090A CN 200810108809 A CN200810108809 A CN 200810108809A CN 101311551 A CN101311551 A CN 101311551A
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- cooling fan
- ring
- blade
- outer ring
- radius
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Abstract
A cooling fan comprises a plurality of vanes (4) arranged in rediatiform around a rotation axis and an out side ring (5) arranged at the cirumferential of each vane (4). In the cooling fan, the number of the vanes (4) is set as 12-16, and a periphery of blowing side of the vanes (4) and the out side ring (5) are connected through a curve part (46) of 10-14 mm. The out side ring (5) comprises a ring body part (51) in approximately a cylinder form and a ring side part (52) extending from the two ends of the axis of the ring body part (51), and also a section in approximately C-shape opening toward the out side of the circumferencial direction.
Description
Technical field
The present invention relates to cooling fan, in detail, relate to the engine cooling fan.
Background technique
Now, the known special table of cooling fan (for example, with reference to patent documentation 1:(Japan) the 2003-531341 communique that has by a plurality of blades constitute and the outer circumferential side end of each blade is connected by ring each other).Such fan is used to cool off the motor of bus or truck etc.
But, the fan of record in the above-mentioned patent documentation 1, not only can be used for cooling off the motor of bus or truck etc., can also be used to cool off the motor of building machineries such as wheeled loading machine, bulldozer, hydraulic shovel, dump truck, especially be subjected to for example 10G (G: the motor of the building machinery of such large impact gravity accleration).In this case, there are the following problems, that is, or foreign matter (rock etc.) bump cooling fan, or dust and dirt such as earth causes the cooling fan breakage easily attached to causing the cooling fan imbalance on the cooling fan.Specifically, the maximum (top) speed N of cooling fan is multiplied by safety coefficient α (α＞1) and the rotational speed N α that obtains as design condition, but obtain the fan-shaped of bearing strength.
But, if increase safety coefficient α, then owing to the rotational speed N α in the design also becomes greatly, so the centrifugal force that cooling fan produced increase, particularly the surface of the attachment portion between blade and ring is easy to generate crackle.If can not obtain the intensity of cooling fan, then having to must be lower with the speed setting on using, and causes obtaining required air quantity.
Summary of the invention
Main purpose of the present invention is to provide a kind of cooling fan, and this cooling fan promptly is used in the motor of building machinery that cooling uses etc. under mal-condition, also have full intensity, and can guarantee required air quantity.
Cooling fan of the present invention, the outer ring that has a plurality of blades of being radial setting around the running shaft and be provided with at the outer circumferential side of each blade, it is characterized in that: the quantity of described blade is set at 12～16, the side peripheral part that blows out at described blade is formed with and is connected with described outer ring, radius is the curve part of 10～14mm, described outer ring comprises ring main body portion roughly cylindraceous and the ring sidepiece that prolongs to radial outside from the axial two ends of this ring main body portion, and have to the cross section of the roughly C font of the outer openings of circumferencial direction, the thickness size of described ring sidepiece is set at 5.5～7.5mm.
According to aforesaid the present invention, because blade quantity is set at more than 12, therefore 1 centrifugal force that blade bore diminishes, even increase the rotating speed in the design, also can keep the intensity of blade.At this, if blade quantity is set at more than 17, the efficient that then causes blowing reduces, and can not obtain required air quantity.Relative therewith, in the present invention,, therefore can keep air-supply efficient and guarantee required air quantity because blade quantity is set at below 16.
In addition, in the present invention, since blade to blow out between side peripheral part and the outer ring by radius be that curve part more than the 10mm connects, therefore under the situation that increases the rotating speed in the design, even it is big that centrifugal force becomes, also can relax the stress that the shape because of the joint between blade and the outer ring causes and concentrate, can keep intensity with respect to the joint of centrifugal force.At this, if the radius of curve part is set at size above 14mm, then cause the influence of blade shape is become big, and the air-supply decrease in efficiency, can not obtain required air quantity.Relative therewith, in the present invention,, therefore can keep air-supply efficient and guarantee required air quantity because the radius of curve part is set at below the 14mm.
And, in the present invention, because the thickness size of the ring sidepiece of outer ring is set at more than the 5.5mm, therefore the section modulus with the circumferencial direction cross section orthogonal shape of outer ring becomes big, so during the rotating speed on increasing design, even it is big that centrifugal force becomes, also can keep the intensity of ring sidepiece (particularly fore-end).At this,, then become and to ignore the influence that increases the centrifugal force increase that causes because of the weight of outer ring if a thickness size of ring sidepiece is set at the size above 7.5mm.Relative therewith, in the present invention,,, also can keep the intensity of outer ring even therefore be subjected to the influence that centrifugal force increases because thickness size is set at below the 7.5mm.
Therefore, even cooling fan of the present invention is used to cool off the motor of building machinery of using etc. under mal-condition, also can has full intensity, and can guarantee required air quantity.
In cooling fan of the present invention, described blade and described outer ring are preferably formed by nylon-based resin.
According to aforesaid the present invention, because blade and outer ring are formed by nylon-based resin, therefore can realize the lightweight of cooling fan, reduce centrifugal force, and can keep full intensity.
In cooling fan of the present invention, outside dimension is preferably set to more than the 600mm.
According to aforesaid the present invention, because outside dimension is set at more than the 600mm, therefore when being used to cool off the motor of building machineries such as wheeled loading machine, bulldozer, hydraulic shovel, dump truck for example, because have the above outside dimension of 600mm, so need not under the situation of further rev up, can keep required air quantity, and be difficult to produce the imbalance that causes because of attachment, can guarantee full intensity.
Description of drawings
Fig. 1 is the plan view of the cooling fan of expression one embodiment of the present invention;
Fig. 2 is the II-II line sectional drawing among Fig. 1;
Fig. 3 is the sectional drawing that amplifies the main position of the described cooling fan of expression;
Fig. 4 is the sectional drawing at main position of cooling fan that amplifies the embodiment of expression present embodiment;
Fig. 5 is the plotted curve that is used to illustrate the effect of described mode of execution;
Fig. 6 is the plotted curve that is used to illustrate the effect of described mode of execution;
Fig. 7 is the plotted curve that is used to illustrate the effect of described mode of execution.
Embodiment
Below, one embodiment of the present invention is described with reference to the accompanying drawings.
Fig. 1 is the plan view of the cooling fan 1 of expression present embodiment, and Fig. 2 is the II-II line sectional drawing among Fig. 1.
In Fig. 1 and Fig. 2, the structure of cooling fan 1 comprises: the steel boss plate 2 of central part, be formed at the interior side ring 3 of these boss plate 2 peripheral parts, in this side ring 3 with circumferentially uniformly-spaced and a plurality of blades 4 of radial setting and be provided with so that the front end of each blade 4 outer ring 5 connected to one another continuously from the front end of each blade 4.This cooling fan 1 constitutes: rotate around running shaft P by the direction along arrow A, dry to blowing out side (direction of the arrow B Fig. 2) from the suction side (suction side) of blade 4.
The quantity of blade 4 is set at 12～16 (among the figure being 14).
The blade outside dimension φ 1 of cooling fan 1 is set at below the above 850mm of 600mm.
Fig. 3 is the sectional drawing that amplifies the main position of presentation graphs 2.
As shown in Figure 3, outer ring 5 is included in the ring sidepiece 52 that is ring main body portion 51 roughly cylindraceous on the whole circumference direction and prolongs to radial outside from the axial two ends of this ring main body portion 51, as shown in Figure 3, in the part of circumferencial direction, has the cross section of the roughly C font of opening laterally.And having roughly, the open part of C shaped sections becomes the slot part 54 of crossing over whole outer ring 5.
The thickness size t1 of ring sidepiece 52 is set at 5.5～7.5mm, and is bigger than the thickness size t2 of ring main body portion 51.Outer side surface from the smooth inner peripheral surface of ring main body portion 51 to each ring sidepiece 52 is connected by the curved face part 53 of radius R 1 that (arrow of expression radius R 1 is represented the position at this position, and the length of arrow is not represented the size of radius.About other radius Rs too).
The thickness size t1 of ring sidepiece 52 is set at bigger than existing size.The ring sidepiece 52 of outer ring 5 is the part that produces maximum centrifugal force in the part of the outermost side that radially becomes cooling fan 1 when rotation cooling fan 1.Thereby being set at thickness size t1 than existing thickness size is greatly the effective ways of guaranteeing to encircle the intensity of sidepiece 52.
In addition, on blade 4, be formed with and compare outer ring 5, further to blowing out the outstanding protuberance 41 of side (direction of arrow B).The periphery of this protuberance 41 is by along radially line part 42 of cooling fan 1, form along the line part 43 of air supply direction (arrow B) and the circular arc part 44 that connects the radius R 2 of these line parts 42,43 at the radial outer end of protuberance 41.
In addition, from the line part 43 of protuberance 41 outward side ring 5 be formed with the circular arc part 45 of radius R 3 and the curve part 46 of the radius R 4 that is connected with this circular arc part, the curved face part 53 of 5 radius R 1, be formed with slick and sly curved surface shape portion continuously from line part 43 to outer ring.Like this, blowing out between side peripheral part and the outer ring 5 of blade 4 is connected by the circular arc part 45 of radius R 3 and the curve part 46 of radius R 4, and particularly the size of radius R 4 is bigger than the size of radius R 3, is set at 10～14mm.
The cooling fan 1 that so constitutes drives by rotations such as not shown motors.And, for example in the inhalation type cooling unit of cooling air, blowing side out by not shown cooler suction cooling air and to motor, this cooler is arranged on a side opposite with motor across cooling fan 1.Peripheral part at cooling fan 1 is provided with the not shown guard shield (シ エ ラ ウ De) that surrounds this cooling fan 1, by the stream of this guard shield formation from the cooling air of cooler.
In case cooling fan 1 rotates and sends cooling air to the B direction, then the pressure that blows out side of cooling fan 1 rises, and a part of cooling air is in from the state of the suction side adverse current of the lateral cooling fan 1 of outer ring 5.Relative therewith, owing on the whole circumference of outer ring 5, be formed with slot part 54, form maze-type structure (ラ PVC リ Application ス Agencies makes) by this slot part 54 and not shown guard shield, therefore can suppress the adverse current of cooling air, improve cooling effectiveness.
In addition, the concrete setting value of the each several part of the cooling fan 1 of the present embodiment of Fig. 1～shown in Figure 3 is for example as follows.
Blade outside dimension φ 1:620mm
Blade quantity: 14
Radius R 4:10mm
Thickness size t1:5.5mm
At this, the shape of the cooling fan 1A when Fig. 4 represents to be set at blade outside dimension φ 1 than the big 850mm of above-mentioned value.The concrete setting value of the each several part of this cooling fan 1A is for example as follows.
Blade outside dimension φ 2:850mm
Blade quantity: 14
Radius R 8:13.7mm
Thickness size t3:7.5mm
The radius R 5 of this cooling fan 1A, the size of R6, R7, with above-mentioned radius R 8 similarly, be set to respectively bigger than the size of the radius R 1 that corresponding to blade outside dimension φ is the cooling fan 1 of 620mm, R2, R3.
As cooling fan 1,1A,,, also can guarantee to be used to cool off required air quantity even do not increase rotating speed by blade outside dimension φ is set at more than the 600mm.For example, even use the situation of cooling fan 1,1A for the motor that cools off building machineries such as hydraulic shovel, bulldozer, wheeled loading machine, because blade outside dimension φ is more than the 600mm,, also can guarantee to be used to cool off required air quantity even therefore do not increase rotating speed.Thus, attachment is difficult to cause imbalance, can keep full intensity.
(effect of present embodiment and effect)
About cooling fan 1 as previously mentioned, the quantity of blade 4 is set at 12～16, with blade 4 to blow out between side peripheral part and the outer ring 5 with radius be that the curve part of 10～14mm connects, and the thickness size of the ring sidepiece 52 of outer ring 5 is set at 5.5～7.5mm, why be based on the idea of following (1)～(3) like this.
(1) inventor simulates in order to study the influence that blade quantity brought that changes cooling fan 1.Its result as shown in Figure 5, if only change blade quantity, is 12 when above at blade quantity then, can judge that the stress σ that produces in 1 blade is littler than the stress reference value σ 1 of blade.Can judge thus, by reducing 1 centrifugal force that blade bore,,, blade quantity is set at more than 12 gets final product in order to keep the intensity of blade even increase rotating speed in the design.
In addition, can also judge, if be set at blade quantity below 11 or more than 17, the efficient that then causes blowing reduces, can not obtain required air quantity, relative therewith, blade quantity is more than 12 16 when following, and the air quantity Q that obtains with the rotation cooling fan of the rotating speed in the design reaches air quantity reference value Q1.
Can confirm by above-mentioned situation, by blade quantity being set at 12～16, can keep required intensity, and can obtain required air quantity.
(2) inventor simulates for the influence that radius R 4 brought of studying the blade 4 that changes cooling fan 1 and the joint between the outer ring 5.Its result as shown in Figure 6, if only change the radius R 4 of joint, is 10mm when above at radius R 4 then, can judge that the stress σ that produces at joint is littler than the stress reference value σ 1 of blade 4.And, can also judge that radius R 4 is 14mm when following, the air quantity Q that obtains with the rotation cooling fan of the rotating speed in the design is above air quantity reference value Q1.
Can confirm by above-mentioned situation, even because of the rotating speed that increases in the design increases centrifugal force, the stress that causes for the shape that relaxes the joint between blade and the outer ring is concentrated, also can by radius be curve part more than the 10mm connect blade 4 blow out side peripheral part and outer ring 5.In addition, can also judge,, can be set at the radius R 4 of curve part below the 14mm in order to prevent to cause the decrease in efficiency of blowing because of the influence that reduces for blade shape.
That is, can confirm, be set at 10～14mm, can keep required intensity, and can obtain required air quantity by radius R 4 with joint.
(3) inventor simulates for the influence that thickness size t1 brought of studying the outer ring 5 that changes cooling fan 1.Its result as shown in Figure 7, if only change thickness size t1, is 5.5mm when above at thickness size t1 then, can judge that section modulus Z1 required on the intensity of section modulus Z than outer ring of outer ring is big.And, can also judge that thickness size t1 is 7.5mm when following, the centrifugal force F that is produced during with the rotation of the rotating speed in design cooling fan is littler than the centrifugal force reference value F1 that considers from the intensity aspect of outer ring.
Can judge by above-mentioned situation, by the section modulus Z of increase with the circumferencial direction cross section orthogonal shape of outer ring 5, even centrifugal force became big when rotating speed in design increased, in order to keep the intensity of ring sidepiece 52 (particularly fore-end), the thickness size t1 of ring sidepiece 52 can be set at more than the 5.5mm.In addition, can also judge,,, thickness size t1 can be set at below the 7.5mm in order to keep the intensity of outer ring 5 even be subjected to increasing the influence of the centrifugal force increase that causes because of the weight of outer ring 5.
That is, can confirm, be set at 5.5～7.5mm, can keep required intensity by thickness size t1 with outer ring 5.
In addition, be used to implement preferred structure of the present invention, method etc., though open in above-mentioned record, the present invention is not limited to this.Promptly, though the present invention mainly illustrates and has illustrated specific mode of execution, but those skilled in the art can carry out various distortion aspect shape, material, quantity, other detailed structure to above-mentioned mode of execution under the situation that does not break away from technological scheme of the present invention and purpose scope.
Therefore, limit the record of disclosed in the above description shape, material etc., it is illustrative record for the ease of understanding the present invention, be not to limit record of the present invention, so, about exceeding part or all the record of component names that those limit shapes, material etc., also should comprise in the present invention.
For example, in said embodiment, cooling fan constitutes and comprises boss plate 2 and interior side ring 3, but the structure of boss plate 2 or interior side ring 3 is not limited to this.
In addition, in said embodiment, interior side ring 3, blade 4 and outer ring 5 are formed by nylon-based resin, for example also can be formed by the resin of similar glass fiber-reinforced polyamide.And interior side ring 3, blade 4 and outer ring 5 are integrally formed, still, in the present invention, blade 4 and outer ring 5 integrally formed getting final product at least.
In addition, illustrated that the cooling fan of described mode of execution is used in the situation of the inhalation type cooling unit of cooling air, but be not limited to this, for example in the inhalation type cooling unit of heated air (air of launched machine heating), also can be by the cooling of cooler that be provided with, not shown between cooling fan and motor heated air, blow side out to opposite with motor one.
In addition, the cooling fan of described mode of execution is not limited to use engine-driving, also can be with motor or fluid motor-driven.
Claims (3)
1. cooling fan has a plurality of blades of being radial setting around running shaft and at the outer ring that the outer circumferential side of each blade is provided with, it is characterized in that:
The quantity of described blade is set at 12～16,
Described blade blow out the side peripheral part be formed be connected with described outer ring, radius is the curve part of 10～14mm,
Described outer ring comprises ring main body portion roughly cylindraceous and the ring sidepiece that prolongs to radial outside from the axial two ends of this ring main body portion, and has to the cross section of the roughly C font of the outer openings of circumferencial direction,
The thickness size of described ring sidepiece is set at 5.5～7.5mm.
2. cooling fan as claimed in claim 1 is characterized in that:
Described blade and described outer ring are formed by nylon-based resin.
3. cooling fan as claimed in claim 1 or 2 is characterized in that:
Outside dimension is set at more than the 600mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007137827A JP4950762B2 (en) | 2007-05-24 | 2007-05-24 | cooling fan |
| JP137827/07 | 2007-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101311551A true CN101311551A (en) | 2008-11-26 |
Family
ID=40100331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101088090A Pending CN101311551A (en) | 2007-05-24 | 2008-05-26 | Cooling fan |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4950762B2 (en) |
| CN (1) | CN101311551A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109864625A (en) * | 2017-12-05 | 2019-06-11 | 佛山市顺德区美的电热电器制造有限公司 | Aerofoil fan, frame component and food cooking machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5273400A (en) * | 1992-02-18 | 1993-12-28 | Carrier Corporation | Axial flow fan and fan orifice |
| US6375427B1 (en) * | 2000-04-14 | 2002-04-23 | Borgwarner Inc. | Engine cooling fan having supporting vanes |
| JP4000794B2 (en) * | 2001-07-25 | 2007-10-31 | 株式会社デンソー | Axial fan |
| US7168922B2 (en) * | 2004-04-26 | 2007-01-30 | Borgwarner Inc. | Plastic fans having improved fan ring weld line strength |
-
2007
- 2007-05-24 JP JP2007137827A patent/JP4950762B2/en not_active Expired - Fee Related
-
2008
- 2008-05-26 CN CNA2008101088090A patent/CN101311551A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109864625A (en) * | 2017-12-05 | 2019-06-11 | 佛山市顺德区美的电热电器制造有限公司 | Aerofoil fan, frame component and food cooking machine |
| CN109864625B (en) * | 2017-12-05 | 2024-02-20 | 佛山市顺德区美的电热电器制造有限公司 | Axial fan, base subassembly and food processor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4950762B2 (en) | 2012-06-13 |
| JP2008291734A (en) | 2008-12-04 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20081126 |