CN100458173C - Contra-rotating axial flow blower - Google Patents
Contra-rotating axial flow blower Download PDFInfo
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- CN100458173C CN100458173C CNB038261189A CN03826118A CN100458173C CN 100458173 C CN100458173 C CN 100458173C CN B038261189 A CNB038261189 A CN B038261189A CN 03826118 A CN03826118 A CN 03826118A CN 100458173 C CN100458173 C CN 100458173C
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Abstract
An axial-flow fan with double impellers is provided that can produce a larger amount of air and a higher static pressure than can be achieved with conventional fans. The axial-flow fan with double impellers has a first axial-flow fan unit Sand a second axial-flow fan unit. The first axial-flow fan unit includes a first case, a first impeller and a plurality of webs that fix a first motor to the first case. The second axial-flow fan unit includes a second case, a second impeller and a plurality of webs that fix a second motor to the second case. The first case and the second case are coupled together to form a housing. The webs of the first axial-flow fan unit and the webs of the second axial-flow fan unit are combined together to form a plurality of stationary webs arranged in the housing. The number of front blades provided at the first impeller is set to five, the number of stationary blades is set to three, and the number of rear blades provided at the second impeller is set to four.
Description
Technical field
The present invention relates to be used to cool off the axial fan that has bilobed wheel of electrical equipment inside, wherein bilobed wheel rotates on opposite directions.
Background technique
Along with the electrical equipment size becomes more and more littler, the space in the electric appliance casing that air flows therein also becomes more and more littler.In order to cool off little shell (case) inside, needing with a large amount of air and high static pressure is the gas fan of feature.In recent years, will have the axial fan of the bilobed wheel that on opposite directions, rotates as gas fan with this feature.
For example, U.S. Patent No. 6,244,818 and Japanese Patent Laid-Open Publication No.2000-257597 a kind of like this gas fan is shown, comprising: first axial-flow fan unit has first impeller that has nine front vanes; Second axial-flow fan unit has second impeller that has nine rear blades; And shell, have the stator blade that is installed between these two axial-flow fan unit.By on opposite directions, rotating first impeller of first axial-flow fan unit and second impeller of second axial-flow fan unit, so that discharge by the first axial-flow fan unit inhaled air from second axial-flow fan unit, described gas fan can be transformed into the axial fan with the bilobed wheel that rotates on opposite directions.
In recent years, some application requirements has the higher performance of axial fan of the bilobed wheel that rotates than having now on opposite directions.
In above-mentioned gas fan, first example of first axial-flow fan unit combines with second example of second axial fan by simple connecting structure (coupling structure).For example, the hook that is connected to a shell is engaged in the mating groove (fitting groove) in another shell, and these two shells rotate relative to one another, so that the engagement of the mating groove of the hook of a shell and another shell.Yet, utilize this meshing engagement structure (engaging structure), act on the applying of power of going up in the opposite direction these two shells are broken away from the side that rotates these two shells in order to connect.
An object of the present invention is to provide a kind of axial fan with the bilobed wheel that rotates on opposite directions, compare with traditional gas fan, it can produce relatively large air and higher static pressure.
Another object of the present invention provides a kind of axial fan with the bilobed wheel that rotates on opposite directions, compare with traditional gas fan, and it has the parts of negligible amounts.
A further object of the present invention provides a kind of axial fan with the bilobed wheel that rotates on opposite directions, it can produce less noise.
Another purpose of the present invention provides a kind of axial fan with the bilobed wheel that rotates on opposite directions, if wherein second impeller of first impeller of first axial-flow fan unit and second axial-flow fan unit stands to act on the power that goes up in the opposite direction with the side that rotates these two shells in order to connect, then they are difficult for separated.
Summary of the invention
Axial fan with the bilobed wheel that rotates on opposite directions according to the present invention comprises shell, first impeller, first motor, second impeller, second motor and a plurality of stator blade.Shell has air passageways, and air passageways has suction oral area and the discharge oral area on its another shaft end side on one of them of two shaft end side.First impeller has a plurality of front vanes that rotate in sucking oral area.Axle rotation first impeller of first motor on a direction of two sense of rotation.Second impeller has a plurality of rear blades that rotate in discharging oral area.Axle rotation second impeller of second motor on the other direction opposite with a described direction.Stator blade is set to fix between first impeller and second impeller in shell, and radially extends.Here, speech " radially " not only is applied to the situation that blade radially extends on straight line, and is applied to the situation that they radially extend on curve.
Axial fan with the bilobed wheel that rotates on opposite directions according to the present invention comprises five front vanes, three stator blades and four rear blades.The present inventor has studied the quantity of front vane, stator blade and rear blade and the relation between the gas fan feature.Discover that compare with other blade quantity combinations, the combinations thereof of the blade quantity of Xian Dinging can produce relatively large air and higher static pressure in the present invention.The combination of above-mentioned blade quantity also can be than other blade quantity combination results noise still less.Therefore, compare with traditional gas fan, the axial fan with the bilobed wheel that rotates on opposite directions according to the present invention can improve air quantity and static pressure, and reduces noise.
Housing (housing) can form an overall structure, also can be formed by two or more constituent elements.For example, when when forming in conjunction with two axial-flow fan unit, by Shell structure housing in conjunction with these two axial-flow fan unit according to the axial fan with the bilobed wheel that on opposite directions, rotates of the present invention.
When first axial-flow fan unit and second axial-flow fan unit were combined together to form the axial fan with the bilobed wheel that rotates on opposite directions, first axial-flow fan unit comprised first shell, first impeller, first motor and three first webs (web).First shell has air passageways, and air passageways has the oral area of suction and have the discharge oral area on its another shaft end side on one of them of two shaft end side.First impeller has a plurality of front vanes that rotate in sucking oral area.Axle rotation first impeller of first motor on a direction of two sense of rotation.Three first webs are arranged on discharges in the oral area, separates along circumference, so that first motor is fastened to first shell.Similarly, second shell has air passageways, and air passageways has the oral area of suction and have the discharge oral area on its another shaft end side on one of them of two shaft end side.Second impeller has a plurality of rear blades that rotate in discharging oral area.Axle rotation second impeller of second motor on the other direction opposite with a described direction.Three second webs are arranged on and suck in the oral area, separate along circumference, so that second motor is fastened to second shell.In this case, three first webs of first axial-flow fan unit and three second web preferred combination of second axial-flow fan unit get up to form three stator blades that radially extend, and described stator blade is set to fix between first impeller and second impeller in housing.Utilize this layout, do not need to construct shell, thereby reduced the number of components that is used in the axial fan with the bilobed wheel that on opposite directions, rotates with three stator blades that separate with axial-flow fan unit.
More specifically, front vane is crooked in the cross section of the front vane that obtains along the direction that is parallel to described axle (or along described axle), makes its arc portion towards the sense of rotation of first impeller, promptly in an aforesaid described direction upper shed.Rear blade is crooked in the cross section of the front vane that obtains along the direction that is parallel to described axle, makes its arc portion towards the sense of rotation of second impeller, promptly in aforesaid described other direction upper shed.In this structure, stator blade is preferably crooked in the cross section of the front vane that obtains along the direction that is parallel to described axle, makes its arc portion towards other direction (sense of rotation of second impeller) with towards the direction opening that rear blade wherein is set.Utilize this layout, may improve maximum empty tolerance and maximum static pressure, and reduce the suction noise.
In an example, first impeller can have the annular periphery wall of the axle of the base portion that centers on five front vanes of top one installation.Second impeller can have around the annular periphery wall of the axle of the base portion of four rear blades of top one installation.This layout allows first and second impellers easily to form by the resin injection molding.
The rotational speed of second impeller is preferably set to slower than the rotational speed of first impeller, to reduce noise.
Another has the bilobed wheel that rotates on opposite directions axial fan according to the present invention has first axial-flow fan unit and second axial-flow fan unit.First axial-flow fan unit comprises: first shell, and comprising air passageways, described air passageways has the oral area of suction and have the discharge oral area on its another shaft end side on one of them of two shaft end side; And first impeller, have a plurality of blades, be suitable in sucking oral area, rotating.Second axial-flow fan unit comprises: second shell, and comprising air passageways, described air passageways has the oral area of suction and have the discharge oral area on its another shaft end side on one of them of two shaft end side; And second impeller, have a plurality of blades, be suitable in discharging oral area, rotating.Then, second shell of first shell of first axial-flow fan unit and second axial-flow fan unit combines by connecting structure.In the present invention, connecting structure comprises: two kinds are engaged portion, are arranged on around the place, end of the periphery of the discharge oral area of first shell of first axial-flow fan unit; And two kinds of engaging pieces, be arranged on around the place, end of the periphery of the suction oral area of second shell of second axial-flow fan unit, and be suitable for and these the two kinds of portions' of being engaged engagements.Then, these two kinds of engaging pieces and these two kinds of portions of being engaged comprise: first kind of engaging piece and first kind are engaged portion, form first kind of meshing engagement structure together; And second kind of engaging piece and second kind be engaged portion, forms second kind of meshing engagement structure together.First kind of meshing engagement structure is suitable for: when first shell that is in coupled situation and second shell stand to be used for the separating action of axial separation first shell and second shell, resist separating action; Stand to be used on the direction two sense of rotation when axle rotates first shell about second shell, to resist first rotary manipulation at first shell that is in coupled situation and second shell.Second kind of meshing engagement structure is suitable for standing to be used on the other direction relative with a described direction to resist second rotary manipulation when axle rotates first shell about second shell at first shell that is in coupled situation and second shell.Utilize the above-mentioned connecting structure that comprises first kind of meshing engagement structure and second kind of meshing engagement structure of the present invention, when execution was connected to first rotary manipulation of second shell with first shell, first kind of meshing engagement structure resisted first rotary manipulation.When carrying out on the other direction opposite with a described sense of rotation when rotating second rotary manipulation of first shell with respect to second shell, second kind of meshing engagement structure resists second rotary manipulation.Therefore, if first axial-flow fan unit and second axial-flow fan unit stand to act on the side that rotates in order to connect with them in the opposite direction during the power on (other direction), second kind of meshing engagement structure can prevent may separating of these two gas fan unit.
The end by making first shell and the end of second shell are drawn close, can make first kind of engaging piece and first kind of portion of being engaged of forming first kind of meshing engagement structure together enter coupled situation, and enter coupled situation by on a direction of two sense of rotation, rotating first shell about second shell, can make second kind of engaging piece and second kind of portion of being engaged of forming second kind of meshing engagement structure together around axle.This linkage arrangement allows first shell and second shell to be linked together with simple action by using first kind of meshing engagement structure.
First kind of engaging piece can be made of the hook with first Surface of action and second Surface of action.When first shell that is in coupled situation and second shell stand to be used for the separating action of these two shells of axial separation, first Surface of action be suitable for first kind be engaged first of portion and be engaged the face engagement.When first shell that is in coupled situation and second shell stand to be used on a described direction when axle rotates first shell about second shell, second Surface of action be suitable for first kind be engaged second of portion and be engaged the face engagement.Second kind of engaging piece can constituting by the projection with the 3rd Surface of action.When first shell that is in coupled situation and second shell stand to be used on the described other direction when axle rotates first shell about second shell, the 3rd Surface of action be suitable for second kind be engaged the 3rd of portion and be engaged the face engagement.First kind is engaged portion and can forms by having first and second first mating grooves that are engaged face.Second kind is engaged portion and can forms by having the 3rd second mating groove that is engaged face.Constituting the aforesaid engaging piece and the portion of being engaged allows first and second kinds of meshing engagement structures to form with better simply structure.
In example according to the axial fan with the bilobed wheel that on opposite directions, rotates of the present invention, the end of first shell and second shell has the profile that is almost rectangle, and one first mating groove and one second mating groove form at least in each of three of four corner parts of first shell.And then hook and projection are wholely set each place of at least three of four corner parts in the end of second shell.The hook and first mating groove form the feasible first kind of meshing engagement structure that form.First kind of meshing engagement structure is suitable for: stand to be used on the direction two sense of rotation to resist first rotary manipulation when axle rotates first rotary manipulation of first shell about second shell at first shell that is in bonding state and second shell.The projection and second mating groove form the feasible second kind of meshing engagement structure that form.Second kind of meshing engagement structure: stand to be used on another sense of rotation relative when axle rotates second rotary manipulation of first shell about second shell, to resist second rotary manipulation with a described direction at first shell that is in bonding state and second shell.
Description of drawings
Fig. 1 is the exploded perspective illustration with axial fan of the bilobed wheel that rotates on opposite directions according to an embodiment of the invention.
Fig. 2 is the perspective view of first shell of first axial-flow fan unit in the axial fan of the bilobed wheel that rotates on opposite directions of having of Fig. 1.
Fig. 3 is the perspective view of second shell of second axial-flow fan unit in the axial fan of the bilobed wheel that rotates on opposite directions of having of Fig. 1.
Fig. 4 is the amplification sectional view of connecting structure that the axial fan of the bilobed wheel that having of Fig. 1 rotate on opposite directions is shown.
Fig. 5 is the cross-sectional view that the front vane, rear blade and the stator blade that obtain along the direction of the axle of the axial fan that is parallel to the bilobed wheel that having of Fig. 1 rotate on opposite directions are shown.
Fig. 6 illustrates in test having of using in the air quantity of the axial fan of the bilobed wheel that rotates on the opposite directions and the diagram of the relation between the static pressure.
Fig. 7 A-7F is the cross-sectional view of the stator blade among the example 1-6 of the axial fan with the bilobed wheel that rotates on opposite directions that uses in test.
Fig. 8 illustrates in test having of using in the air quantity of the axial fan of the bilobed wheel that rotates on the opposite directions and the diagram of the relation between the static pressure.
Fig. 9 illustrates in test having of using in the air quantity of the axial fan of the bilobed wheel that rotates on the opposite directions and the diagram of the relation between the static pressure.
Embodiment
Now, embodiments of the invention are described with reference to the accompanying drawings.Fig. 1 is the exploded perspective illustration with axial fan of the bilobed wheel that rotates on opposite directions according to an embodiment of the invention.As shown in FIG., the axial fan with the bilobed wheel that rotates on opposite directions has first axial-flow fan unit 1 and second axial-flow fan unit 3 that combines by connecting structure.Fig. 2 is the perspective view of first axial-flow fan unit 1, and Fig. 3 is the perspective view of second axial-flow fan unit 3.
First axial-flow fan unit 1 has first shell 5, is installed in first impeller (preceding impeller) 7, first motor 25 shown in Fig. 2 and three webs 19,21,23 shown in Fig. 2 in first shell 5.In Fig. 1, first impeller (preceding impeller) 7 illustrates with the size of amplifying.As shown in Fig. 1 and Fig. 2, annular suction side flange 9 and the annular on the other end that first shell 5 has on one of them of the two ends of (in the axial direction) on the axis A are discharged side flange 11.First shell 5 also has the cylindrical portion 13 between these two flanges 9,11.Inner space in flange 9,11 and the cylindrical portion 13 forms air passageways together.
Fig. 2 is the perspective view of first shell 5 of first axial-flow fan unit 1, first axial-flow fan unit 1 as the axial fan by making the bilobed wheel that second axial-flow fan unit 3 and having of Fig. 1 rotate on opposite directions is separated, and sees from the joint part between first shell 5 and second axial-flow fan unit 3.Suction side flange 9 has the profile that is almost rectangle that wherein is formed with octagon suction oral area 15.Suction side flange 9 has the plane 9a and the through hole 9b that is used for mounting screw in the face of cylindrical portion 13 at its four corner part places.
Except the corner part 12B near the web 19 that unshowned electric wire wherein is installed, each is formed with three corner part 12A, 12C, 12D and constitutes second kind of second mating groove 31 that is engaged portion.As shown in Figure 4, second mating groove 31 have protruding moving trough 31a and with the continuous engaging groove 31b of protruding moving trough 31a.Projection moving trough 31a has towards the opening 31c of the side surface opening of discharging side flange 11.Projection moving trough 31a has bottom surface 31d, and described bottom surface 31d tilts for making, when its from opening 31c when engaging groove 31b extends, its close second axial-flow fan unit 3.As a result, step is formed between engaging groove 31b and the protruding moving trough 31a.The internal surface that is positioned at the engaging groove 31b on the protruding moving trough 31a side constitutes the 3rd and is engaged surperficial 31e.
Second axial-flow fan unit 3 has second shell 33, is installed in second motor 49 of second impeller of the Fig. 1 in second shell 33 (back impeller) 35, Fig. 3 and three webs 43,45,47 of Fig. 3.In Fig. 1, second impeller (back impeller) 35 illustrates with the size of amplifying.As shown in Fig. 1 and Fig. 3, second shell 33 has annular suction side flange 37 on one of them of the two ends of (in the axial direction) on the axis A and the discharge side flange 39 on the other end.Second shell 33 also has the cylindrical portion 41 between these two flanges 37,39.Inner space in flange 37,39 and the cylindrical portion 41 forms air passageways together.Fig. 3 is the perspective view of second shell 33 of second axial-flow fan unit 3, second axial-flow fan unit 3 as the axial fan by making the bilobed wheel that first axial-flow fan unit 1 and having of Fig. 1 rotate on opposite directions is separated, and sees from the joint part between second shell 33 and first axial-flow fan unit 1.
As shown in Figure 3, four of suction side flange 37 corner part 36A-36D are formed with the through hole 38 that mounting screw passes respectively.Each of four corner part 36A-36D also has the hook 53 that is integrally formed therewith, and described hook 53 constitutes first kind of engaging piece.Hook 53 protrudes to first shell 5.With the formation of explanation at the hook 53 at corner part 36A place.Hook 53 has the main body portion 53a that rises from corner part along axle A and is connected the head 53b of the front end of main body portion 53a.Head 53b at the front end place of main body portion 53a outwards protrudes away from axle A diametrically gradually, thereby forms the step between head 53b and the main body portion 53a.The surface formation and first of described step is engaged the first Surface of action 53d of face 29d engagement.Except near the corner part 36B of web 43, each is all integrally formed with the projection 55 that constitutes second kind of engaging piece for three corner part 36A, 36C, 36D, makes through hole 38 between hook 53 and projection 55.Identical with hook 53, projection 55 is protruded to first shell 5 along axle A.Projection 55 has inclined-plane 55a, described inclined-plane tilt for make when its when being arranged in the hook 53 of identical corner part, close first shell 5.Described inclined-plane 55a slides on the inclined-plane of the bottom surface 31d that forms the protruding moving trough shown in Fig. 4.Projection 55 has the end face 55b that extends to second shell 33 along described axle from inclined-plane 55a one end.Described end face 55b forms and is formed on the 3rd Surface of action that the 3rd among the engaging groove 31b is engaged face 31e engagement.
In the example of this gas fan, second shell 33 of first shell 5 of first axial-flow fan unit 1 and the second circumfluence gas fan unit 3 is following combined.At first, the end of first shell 5 and the end face of second shell 33 are drawn close, and the head 53b of four hooks 53 of second shell 33 insert the respective hook of four first mating grooves 29 in first shell 5 by among the 29a of hole.Simultaneously, three of second shell 33 projectioies 55 fit among the opening 31c of three second mating grooves 31 in first shell 5.Then, as shown in Fig. 2 and Fig. 3, these shells 5,33 are about clockwise rotating on a direction (D1 represents with arrow) each other.This rotation or realize by rotating this two shells perhaps realizes by only rotating another shell about a shell.This rotation makes the main body portion 53a of hook 53 move among the 29b of hole mobile at the hook of first mating groove 29, being contiguous to first on the planar end surface 11a that discharges side flange 11 up to the first Surface of action 53d of the head 53b of hook 53 is engaged on the face 11, the second Surface of action 53e of main body portion 53a is contiguous to second of discharge side flange 11 and is engaged on the face 29e, thereby prevents that hook 53 from coming off from first mating groove 29.And projection 55 moves in the projection moving trough 31a of second mating groove 31, fits into engaging groove 31b up to them.Projection 55 end face 55b be formed on the 3rd among the engaging groove 31b and be engaged face 31e engagement.
In described embodiment, hook 53 (first kind of engaging piece) and first mating groove 29 (first kind is engaged portion) combine first kind of meshing engagement structure of formation.Projection 55 (second kind of engaging piece) and second mating groove 31 (second kind is engaged portion) combine second kind of meshing engagement structure of formation.Utilize this structure, when the separating action that moves in the axial direction no longer is engaged with each other first shell 5 and second shell 33, on the planar end surface 11a of the first Surface of action 53d of the head 53b of hook 53 and discharge side flange 11 first is engaged face 29d engagement, impels first kind of meshing engagement structure to resist separating action.And, when carry out first rotary manipulation with a direction of representing with arrow D1 on when axle A rotation is in first shell 5 of bonding state and second shell 33, the second Surface of action 53e of main body portion 53a is engaged face 29e engagement with second of discharge side flange 11, impels first kind of meshing engagement structure to resist first spinning movement.When carry out second rotary manipulation with on the direction of representing with arrow D2 opposite with a described direction (arrow D1) when axle A rotation is in first shell 5 of bonding state and second shell 33, form the end face of projection 55 of the 3rd Surface of action and second mating groove 31 engaging groove 31b the 3rd be engaged face 31e engagement, impel second kind of meshing engagement structure to resist second spinning movement.Like this, in the gas fan of present embodiment,, can prevent that also their from separating even first shell 5 and second shell 33 stand to act on the power on the direction of arrow D1 or act on power on the direction of arrow D2.
As shown in fig. 1, in the gas fan of present embodiment, first shell 5 and second shell 33 are combined together to form housing 59; And the web 19,21,23 of first axial-flow fan unit 1 and the web 43,45,47 of second axial-flow fan unit 3 are combined together to form three stator blades 61 (Fig. 5) that radially extend, and wherein said stator blade is set to fix in housing 59 between first impeller 7 and second impeller 35.When first impeller 7 in rotation on the direction R1 and second impeller 35 when on other direction R2, rotating, air moves to discharging oral area 57 from sucking oral area 15 on direction F.Fig. 5 illustrates front vane 28, rear blade 35 and the stator blade 61 in the cross-sectional view that obtains along the direction that is parallel to described axle, and wherein first shell 5 and second shell 33 combine.In the example shown in Figure 5, by in conjunction with the web 3 of first axial-flow fan unit 1 and and the web 47 of second axial-flow fan unit 3 form stator blades 61.As shown in FIG., front vane 28 is crooked in cross section, makes its arc portion towards R1 direction opening, and rear blade 51 is crooked in cross section, makes its arc portion towards the other direction opening.Stator blade 61 is crooked in cross-sectional view, makes its arc portion towards the other direction opening, also towards rear blade 51 residing direction openings.
Manufacturing structure is similar with present embodiment but a plurality of gas fans that front vane quantity is different, by operating these gas fans simultaneously, checks with regard to air quantity in these gas fans each and the relation between the static pressure.Rotate second impeller of these gas fans with 67% of the speed of first impeller.Fig. 6 illustrates measurement result.In Fig. 6, indicate ● line represent in the present embodiment measurement result to gas fan with five front vanes, three stator blades and four rear blades; The line that indicates △ is represented the measurement result to the gas fan with five front vanes, three stator blades and three rear blades; Indicate+line represent measurement result to gas fan with five front vanes, three stator blades and five rear blades; And the line that indicates x is represented the measurement result to the gas fan with five front vanes, four stator blades and three rear blades.Fig. 6 illustrates air quantity and the static pressure with these gas fans (5-3-4) of present embodiment other gas fan relatively, and wherein the air quantity of present embodiment and static pressure are defined as Q and H respectively.The gas fan with five front vanes, three stator blades and four rear blades that Fig. 6 illustrates present embodiment produces bigger air quantity and better static pressure than other air-supply function.
Table 1 illustrate identical with the test of Fig. 6 when rotating second impeller with 67% of the speed of first impeller suction noise (dB (A)) and the power consumption of each gas fan.In table 1, the blade quantity leu illustrates the quantity of front vane, stator blade and rear blade, sucks noise (dB (A)) and power consumption and is listed as the suction noise Lp of the gas fan (5-3-4) that present embodiment is shown and the value of power consumption P.
Table 1
| Blade quantity | Suck noise | Power consumption |
| 5-3-4 | Lp | P |
| 5-3-5 | Lp+2 | PX1.10 |
| 5-3-3 | Lp+5 | PX1.15 |
| 5-4-3 | Lp±0 | PX1.06 |
Then, so that the stator blade of gas fan has the shape of cross section different with present embodiment, and the mode of the structural similarity of others and present embodiment is made a plurality of gas fans.All measure currency, maximum empty tolerance, maximum static pressure and suction noise for each gas fan.Table 2 illustrates measurement result.In table 2, the gas fan that is used for the example 1-6 of comparison has cross section at the stator blade shown in Fig. 7 A-7F.Or rather, the stator blade of example 1 (Fig. 7 A) is crooked in cross section, makes its arc portion to direction R1 with to front vane 28 residing direction openings.The stator blade of example 3 (Fig. 7 C) is crooked in cross section, makes its arc portion to direction R2 with to front vane 28 residing direction openings.The stator blade of example 4 (Fig. 7 D) is crooked in cross section, makes its arc portion to direction R1 with to rear blade 51 residing direction openings.The stator blade of example 6 (Fig. 7 F) does not have arc portion, but tilts for make that they are near front vane 28 when they extend on direction R2.And in table 2, the first impeller rotational speed, the second impeller rotational speed, currency, maximum empty tolerance, static pressure and suction noise (dB (A)) are represented the value with respect to analog value N1, the N2 of the gas fan of present embodiment, I, Q, H, Lp.
Table 2
| The first impeller rotational speed | The second impeller rotational speed | At present | Maximum empty tolerance | Maximum static pressure | Suck noise (dB (A)) | |
| Embodiment | N1 | N2＝N1X0.67 | I | Q | H | Lp |
| Example 1 | N1X1.02 | N2X1.07 | IX0.98 | QX1.02 | HX0.97 | Lp+2 |
| Example 2 | N1X1.00 | N2X1.00 | IX1.00 | QX1.00 | HX0.97 | Lp±0 |
| Example 3 | N1X1.00 | N2X1.11 | IX0.97 | QX0.95 | HX0.97 | Lp+2 |
| Example 4 | N1X1.00 | N2X1.06 | IX0.98 | QX0.97 | HX1.02 | Lp+2 |
| Example 5 | N1X0.98 | N2X1.11 | IX0.98 | QX0.88 | HX1.00 | Lp+4 |
| Example 6 | N1X1.00 | N2X0.97 | IX1.02 | QX0.97 | HX1.00 | Lp+1 |
According to table 2 deducibility, compare with those gas fans with stator blade of the cross section that has example 1-6, by rotational speed being made suitable adjustment, the air-supply function with cross section stator blade identical with present embodiment produces higher maximum static pressure and littler suction noise.
And Fig. 8 illustrates when the gas fan of the gas fan of present embodiment and example 1-6 is worked under the condition identical with the test of table 2, the air quantity of each gas fan and the relation between the static pressure.Air quantity shown in Fig. 8 and static pressure are represented the analog value Q of the gas fan (5-3-4) about present embodiment and the value of H.Can see from Fig. 8, compare that the air-supply function of present embodiment produces bigger air quantity and the static pressure of Geng Gao with the gas fan of example 1-6.
Their currency, maximum empty tolerance, maximum static pressure and suction noise when table 3 illustrates gas fan as the gas fan of present embodiment and example 1-6 with identical speed operation.Fig. 9 illustrates the air quantity of each gas fan when the gas fan of present embodiment and example 1-6 is worked and the relation between the static pressure under the condition identical with the test of table 3.
Table 3
| The first impeller rotational speed | The second impeller rotational speed | At present | Maximum empty tolerance | Maximum static pressure | Suck noise (dB (A)) | |
| Embodiment | N1 | N2＝N1X0.67 | I | Q | H | Lp |
| Example 1 | N1X1.00 | N2X1.00 | IX0.87 | QX0.97 | HX0.90 | Lp+1 |
| Example 2 | N1X1.00 | N2X1.00 | IX1.00 | QX1.00 | HX0.97 | Lp±0 |
| Example 3 | N1X1.00 | N2X1.00 | IX0.85 | QX0.91 | HX0.89 | Lp+1 |
| Example 4 | N1X1.00 | N2X1.00 | IX0.92 | QX0.93 | HX0.97 | Lp+2 |
| Example 5 | N1X1.00 | N2X1.00 | IX0.88 | QX0.84 | HX0.94 | Lp+3 |
| Example 6 | N1X1.00 | N2X1.00 | IX1.07 | QX0.98 | HX1.02 | Lp+2 |
According to Fig. 9 deducibility, to compare with those gas fans of example 1-6, the air-supply function of present embodiment produces bigger air quantity and the static pressure of Geng Gao.Also see,, compare with the gas fan of present embodiment although the gas fan of present embodiment has almost identical with the gas fan of example 6 air quantity and static pressure, the higher electric current of gas fan consumption of example 6, and produce bigger suction noise.
Industrial applicability
Utilize the present invention, by respectively the quantity of front vane, stator blade and rear blade being set as five, three and four, compare with static pressure with the air capacity of utilizing traditional pressure fan to obtain, may produce larger air capacity and the static pressure of Geng Gao. Also may realize the minimizing of noise. Compare with traditional pressure fan, this provides better electrical equipment cooling effect.
And when execution made the first shell with the first rotary manipulation that second housing connects, a kind of engaging structure in ground resisted the first spinning movement; And going up in the opposite direction when rotating the first shell with respect to second housing with described first party when carrying out, the second engaging structure resists the second spinning movement. Therefore, if the first axial-flow fan unit and the second axial-flow fan unit stand to act in order to connect the power on the direction of rotating with the opposite direction of these two pressure fans, then the second engaging structure can prevent that this two pressure fans from separating.
Claims (3)
1. axial fan that has bilobed wheel comprises:
Housing wherein has air passageways, and described air passageways has the oral area of suction and have the discharge oral area on its another shaft end side on one of them of two shaft end side;
First impeller has a plurality of front vanes that rotate in sucking oral area, be suitable for rotating in sucking oral area;
First motor, the axle around gas fan on a direction of two sense of rotation rotates first impeller;
Second impeller has a plurality of rear blades, is suitable for rotating in discharging oral area;
Second motor rotates second impeller around described axle on the other direction opposite with a described direction; And
A plurality of stator blades radially extend, and in described housing, be set to fix between first impeller and second impeller;
Wherein the quantity of front vane is five, the quantity of stator blade be three and the quantity of rear blade be four;
Wherein front vane is crooked in the cross section of the front vane that obtains along the direction that is parallel to described axle, makes its arc portion towards a described direction opening;
Wherein rear blade is crooked in the cross section of the rear blade that obtains along the direction that is parallel to described axle, makes its arc portion towards described other direction opening;
Wherein stator blade is crooked in the cross section of the stator blade that obtains along the direction that is parallel to described axle, makes its arc portion towards described other direction with towards the direction opening that rear blade wherein is set; And
Wherein the rotational speed of second impeller is slower than the rotational speed of first impeller.
2. the axial fan that has bilobed wheel according to claim 1, wherein first impeller has the annular periphery wall of the axle of the base portion that centers on five front vanes of top one installation; And
Wherein second impeller has the annular periphery wall of the axle of the base portion that centers on four rear blades of top one installation.
3. axial fan that has bilobed wheel comprises:
First axial-flow fan unit comprises: first shell, and wherein said first shell comprises air passageways, described air passageways has the oral area of suction and have the discharge oral area on its another shaft end side on one of them of two shaft end side; First impeller, described first impeller have a plurality of front vanes that rotate in sucking oral area, be suitable for rotating in sucking oral area; First motor, described first motor axle around gas fan on a direction of two sense of rotation rotates first impeller; And a plurality of first webs, separate along circumference, be installed in and discharge in the oral area, so that first motor is fastened to first shell;
Second axial-flow fan unit comprises: second shell, and wherein said second shell comprises air passageways, described air passageways has the oral area of suction and have the discharge oral area on its another shaft end side on one of them of two shaft end side; Second impeller, described second impeller has a plurality of rear blades, is suitable for rotating in discharging oral area; Second motor, described second motor rotate second impeller around described axle on the other direction opposite with a described direction; And a plurality of second webs, separate along circumference, be installed in the suction oral area, so that second motor is fastened to second shell;
Wherein second shell of first shell of first axial-flow fan unit and second axial-flow fan unit is coupled, to form housing;
Wherein a plurality of second webs of a plurality of first webs of first axial-flow fan unit and second axial-flow fan unit are combined, to be formed on a plurality of stator blades that fixedly install in the described housing between described first impeller and described second impeller;
Wherein the quantity of front vane is five, the quantity of stator blade be three and the quantity of rear blade be four;
Wherein front vane is crooked in the cross section of the front vane that obtains along the direction that is parallel to described axle, makes its arc portion towards a described direction opening;
Wherein rear blade is crooked in the cross section of the rear blade that obtains along the direction that is parallel to described axle, makes its arc portion towards described other direction opening;
Wherein stator blade is crooked in the cross section of the stator blade that obtains along the direction that is parallel to described axle, makes its arc portion towards described other direction with towards the direction opening that rear blade wherein is set; And
Wherein the rotational speed of second impeller is slower than the rotational speed of first impeller.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP68858/2003 | 2003-03-13 | ||
| JP68859/2003 | 2003-03-13 | ||
| JP2003068858A JP3993118B2 (en) | 2003-03-13 | 2003-03-13 | Counter-rotating axial fan |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100956132A Division CN101280792B (en) | 2003-03-13 | 2003-04-28 | Counter-rotating axial blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1751184A CN1751184A (en) | 2006-03-22 |
| CN100458173C true CN100458173C (en) | 2009-02-04 |
Family
ID=33286075
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038261189A Expired - Lifetime CN100458173C (en) | 2003-03-13 | 2003-04-28 | Contra-rotating axial flow blower |
| CN2008100956132A Expired - Lifetime CN101280792B (en) | 2003-03-13 | 2003-04-28 | Counter-rotating axial blower |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100956132A Expired - Lifetime CN101280792B (en) | 2003-03-13 | 2003-04-28 | Counter-rotating axial blower |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3993118B2 (en) |
| CN (2) | CN100458173C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4508976B2 (en) * | 2005-08-03 | 2010-07-21 | 三菱重工業株式会社 | Propeller fan shroud and propeller fan |
| US7815418B2 (en) | 2005-08-03 | 2010-10-19 | Mitsubishi Heavy Industries, Ltd. | Shroud and rotary vane wheel of propeller fan and propeller fan |
| JP4128194B2 (en) | 2005-09-14 | 2008-07-30 | 山洋電気株式会社 | Counter-rotating axial fan |
| JP4844877B2 (en) | 2006-05-29 | 2011-12-28 | 日本電産株式会社 | Series axial fan and axial fan |
| JP2008038639A (en) | 2006-08-02 | 2008-02-21 | Nippon Densan Corp | Serial axial fan |
| CN101191505B (en) * | 2006-11-30 | 2011-01-12 | 台达电子工业股份有限公司 | Tandem fan and connection structure thereof |
| CN101319684B (en) * | 2007-06-05 | 2011-09-14 | 台达电子工业股份有限公司 | Fan frame and its production method |
| JP5386353B2 (en) | 2007-07-12 | 2014-01-15 | 山洋電気株式会社 | Counter-rotating axial fan |
| JP5147853B2 (en) * | 2007-10-29 | 2013-02-20 | 山洋電気株式会社 | Control method of counter-rotating axial flow fan |
| JP5004022B2 (en) * | 2008-02-26 | 2012-08-22 | 日本電産株式会社 | Axial fan |
| TWI390116B (en) | 2008-02-26 | 2013-03-21 | Nidec Corp | A shaft fan unit connected in series and a frame of an axial fan unit connected in series |
| TW200936889A (en) | 2008-02-26 | 2009-09-01 | Nidec Corp | Axial flow fan unit |
| JP5244620B2 (en) * | 2008-05-26 | 2013-07-24 | 山洋電気株式会社 | Blower |
| JP2010031659A (en) | 2008-07-25 | 2010-02-12 | Nippon Densan Corp | Serial axial fan |
| CN102465906A (en) * | 2010-11-19 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Fan assembly |
| CN102852839B (en) * | 2011-06-29 | 2016-05-11 | 富准精密工业(深圳)有限公司 | Combination of fans |
| JP2014238059A (en) | 2013-06-07 | 2014-12-18 | 日本電産株式会社 | Serial axial flow fan |
| CN106382241B (en) * | 2016-12-05 | 2018-11-23 | 山东英才学院 | A kind of hollow shaft force(d) (draft) fan |
| US10697466B2 (en) | 2017-01-12 | 2020-06-30 | Nidec Corporation | Serial axial flow fan |
| JP7187996B2 (en) | 2018-11-08 | 2022-12-13 | 日本電産株式会社 | series axial fan |
| JP7192419B2 (en) | 2018-11-08 | 2022-12-20 | 日本電産株式会社 | series axial fan |
| CN111692717B (en) * | 2019-03-12 | 2022-03-01 | 广东美的制冷设备有限公司 | Operation control method, operation control device, air conditioner, and storage medium |
| CN114150608A (en) * | 2021-12-06 | 2022-03-08 | 格力博(江苏)股份有限公司 | In-line double-impeller blower |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP3993118B2 (en) | 2007-10-17 |
| CN1751184A (en) | 2006-03-22 |
| JP2004278370A (en) | 2004-10-07 |
| CN101280792A (en) | 2008-10-08 |
| CN101280792B (en) | 2011-05-04 |
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