CN110319057A - A kind of front bended sweepforward fills formula blade, impeller and its axial flow blower partially - Google Patents
A kind of front bended sweepforward fills formula blade, impeller and its axial flow blower partially Download PDFInfo
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- CN110319057A CN110319057A CN201910649910.5A CN201910649910A CN110319057A CN 110319057 A CN110319057 A CN 110319057A CN 201910649910 A CN201910649910 A CN 201910649910A CN 110319057 A CN110319057 A CN 110319057A
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- sweepforward
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- impeller
- leaf
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- 238000013461 design Methods 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 description 12
- 239000004753 textile Substances 0.000 description 11
- 230000006872 improvement Effects 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000009941 weaving Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of front bended sweepforwards to fill formula blade, impeller and its axial flow blower, especially blade partially, and fundamental mode is axial-flow fan blade, including blade root, Ye Zhong, blade tip；It is located at the high position 0.4-0.7 of the blade and blade in the leaf；(1) Ye Zhongzhi blade tip position carries out sweepforward deflection, and deflection is gradually deflected using sinusoidal radian；(2) it is integrally filled partially at the blade root to blade tip of the blade, it is contrary with sweepforward deflection for filling direction partially；(3) blade root of the blade gradually carries out antecurvature to leaf central part position, and antecurvature direction is the windward side direction of blade.Impeller, the axial flow blower being made of above-mentioned blade, on the basis of conventional axial-flow fan blade, blade profile is redesigned, using etc. circular rectors+change circular rector design impeller it is wide, and the measures such as antecurvature, sweepforward, deflection are carried out to blade on the high direction of leaf, while improving fan operation efficiency, blade strength is improved, reduces fan operation noise.
Description
Technical field
The present invention relates to a kind of blade of axial flow fan for textile manufacturing, especially a kind of front bended sweepforward of the formula of dress partially designs blade
And the impeller and corresponding axial flow blower formed.
Background technique
Currently, in the textile industry, the use of axial flow blower is more universal；It usually needs to pass through installation in spinning and weaving workshop
Axial flow blower is aerated, dust discharge.In the past, since Weaving device level is poor, noise is larger, therefore the axis stream wind used in workshop
Even if machine noise is larger, also without much relations, much influences will not be generated on staff.And with the improvement of Weaving device
Upgrading, noise have substantially reduced；In this case, axial flow blower used in textile industry, it is necessary to reduce noise, come
Meet the workshop noise demand for control of textile enterprise.
With the research and development of axial flow blower industry, blade profile is optional there are many blades of axial flow blower at present, wherein sweepforward
Design blade can reduce the noise of blower entirety, and improve fan operation efficiency；But also due to its leaf structure leads to leaf
Piece intensity is poor, the more difficult popularization in industrial application；Part industrial applications can be solved using the better material of performance
Strength problem, but will lead to being significantly increased for the entire impeller cost of raw material, while the manufacture difficulty of impeller also greatly improves,
Increase the whole manufacturing cost of blower.Meanwhile in textile industry, blower is typically mounted at interior, thus to its noise reduction require compared with
It is high.
Existing sweepforward designs vaneaxial blower, is generally all redesigned to the blade profile of blade, such as China
Invention patent publication number is a kind of efficient sweepforward type subway tunnel axial flow blower of CN105065302B, that is, uses " blade
There is a sweepforward point on leading edge tail end, the angle of attack a with a torsion between the blade tip and blade root of the blade, a=5~15
Degree, with a thickness of the 1/5~1/2 of leading edge thickness, the blade root bottom end of the blade has an end curved for the trailing edge of the blade " etc. skills
Art means further increase the operational efficiency of blower under the premise of proof strength.
But it is directed to the industrial application of textile industry, the factors such as intensity, manufacturing cost, noise of impeller are required to sufficiently examine
Consider, therefore need the service condition further combined with textile industry axial flow blower, is studied, changed for the structure of sweepforward blade
Into being allowed to meet the needs of textile industry axial flow blower.
Summary of the invention
The object of the present invention is to provide a kind of front bended sweepforwards to fill formula blade partially, and forms impeller by the blade, best
Form axial flow blower while improving operational efficiency, reduces structure and answers to meet the industrial application demand of textile industry
Power intensity reduces operation noise.
To achieve the purpose that foregoing invention, the first aspect of the present invention provides a kind of front bended sweepforward and fills formula blade partially,
It is characterized in that, the blade fundamental mode is axial-flow fan blade, including blade root, Ye Zhong, blade tip；
It is located at 0.4~0.7 high position of the blade and blade in the leaf；It is inclined that Ye Zhongzhi blade tip position carries out sweepforward
Turn, deflection is gradually deflected using sinusoidal radian, in the impeller exterior feature center at final blade tip position and the impeller exterior feature of leaf central part position
Deflection angle between heart line, with the impeller exterior feature center at blade root position and the impeller exterior feature line of centres of leaf central part position is θ；θ≤
20°；
It is integrally filled partially at the blade root to blade tip of the blade, it is contrary with sweepforward deflection for filling direction partially；Dress partially
Impeller exterior feature center in leaf afterwards connects to the impeller exterior feature line of centres of blade root with impeller exterior feature center to the blade axis of rotation of blade root
Wire clamp angle is α；α=5 °~8 °；
The blade root of the blade gradually carried out to leaf central part position it is antecurvature, antecurvature direction be blade windward side direction；It is described
The antecurvature impeller exterior feature line of centres from petiole along the blade is bent, and bending angle terminates in the leaf of the blade
Position makes the sweepforward position of the blade obtain the antecurvature of fixed angle β；β≤10°.
As a further improvement of the present invention, θ=10 °~20 °；α=5 °~8 °；β=1 °~3 °.
As a further improvement of the present invention, 0.5 high position of the blade and blade is located in the leaf.
Further, θ=3 °~5 °；α=5 °；β=8 °~10 °.
As a further improvement of the present invention, the blade root of the blade to the circular rectors sections such as leaf central part position use are designed.
Further, Ye Zhongzhi blade tip position is designed using circular rector section is become.
The second aspect of the present invention provides a kind of front bended sweepforward and fills formula impeller partially, including front bended sweepforward as described above is inclined
Dress formula blade；It also include a wheel hub, outer ring is provided with several petiole fixing device for installing, is installed and is fixed by the petiole
Several front bended sweepforwards as described above are filled formula blade partially and are fixed in the outer rim of the wheel hub by device；
It is R that above-mentioned front bended sweepforward fills the blade root of formula blade away from the distance of the axis of rotation of the impeller partially；It is above-mentioned it is antecurvature before
The whole height for plunderring dress formula blade partially is L, R=0.43~0.66L.
Further, the windward side direction of the wheel hub is additionally provided with the smooth outer hub shell of a smooth outer surface.
The second aspect of the present invention provides a kind of axial flow blower, including front bended sweepforward as described above fills formula impeller partially；
The quantity that the front bended sweepforward fills formula blade partially is 8.
A kind of front bended sweepforward fills formula blade, impeller and its axial flow blower partially, right on the basis of conventional axial-flow fan blade
Blade profile is redesigned, using etc. circular rectors+change circular rector design impeller it is wide, and on the high direction of leaf blade is carried out antecurvature, preceding
It the measures such as plunders, deflect, while improving fan operation efficiency, improving blade strength, reduce fan operation noise.
A kind of front bended sweepforward of the present invention fills formula blade, impeller and its axial flow blower compared with prior art partially and has following excellent
Point:
(1) existing structure of blower is had not been changed, it is only necessary to remake blade mold, can produce；
(2) operational efficiency for improving blower has saved blower Energy in use；
(3) in the case where not changing material, blade strength is improved, improves the property safe and reliable to operation of blower；
(4) fan operation noise is effectively reduced, that is, reduces the environmental noise that terminal uses, improves fan operation week
The operating environment on side.
Detailed description of the invention
Fig. 1 is blade sweepforward aerofoil profile schematic diagram；
Fig. 2 is blade deflection schematic diagram；
Fig. 3 is that a kind of front bended sweepforward of the invention fills formula blade overall structure diagram partially；
Fig. 4 is impeller overall mechanism Fig. 1 of the invention；
Fig. 5 is impeller overall mechanism Fig. 2 of the invention；
Fig. 6 is CFD analog intensity cloud atlas when axial flow blower of the invention uses blade 1；
Fig. 7 is CFD analog intensity cloud atlas when axial flow blower of the invention uses blade 4；
Appended drawing reference: blade axis of rotation 1；Blade root 2；Blade tip 3；4 in leaf；Petiole 5；Wheel hub 6；Blade 7；Maximum stress area
8。
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
The present invention first provides a kind of front bended sweepforward and fills formula blade partially, carries out on the basis of conventional axial-flow fan blade
It improves, improvement includes two aspects.
Embodiment 1: front bended sweepforward fills formula blade 1 partially；In order to sufficiently improve the operational efficiency of blower.
It is high by 0.4~0.7 or more in the leaf of blade, sweepforward deflection is carried out, the sweepforward deflection angle at final end of blade position is 10 °
It~20 °, can be with reference to shown in Fig. 1；Blade axis of rotation 1 is the hub axis of impeller, is equipped with blade by wheel hub, institute
The blade root 2 for stating blade is the widest part of blade, and the blade tip 3 of blade is the most narrow place of blade；Corresponding blade root 2 is revolved away from blade
The distance of the shaft heart 1 is R, i.e. the radius of wheel hub adds 5 length dimension of petiole；Blade whole height is L, i.e., blade root 2 is away from blade tip 3
Vertical height；Wherein R=0.43~0.66L；Improvement of the invention is that the top of blade carries out sweepforward deflection, specifically
For a=0.4~0.7, be set as 4 in leaf at a × L height, the blade root 2 of blade 4 positions into leaf remain unchanged, the position blade
Using etc. circular rectors section design；And in leaf 4 to 3 position of blade tip carry out sweepforward deflection, the position blade using become circular rector section set
Meter, deflection can gradually be deflected using sinusoidal radian, the leaf at 4 positions in the impeller exterior feature center at final 3 position of blade tip and leaf
Deflection angle in the profile line of centres, with the impeller exterior feature center at 2 position of blade root and leaf between the impeller exterior feature line of centres at 4 positions
For θ, θ=10 °~20 °；
Sweepforward design is carried out to blade, the outlet air efficiency of final impeller and blower can be improved；But also due to blade tip 3
Position wind cutting angle is bigger, results in blade strength reduction；
Existing sweepforward blade generallys use whole sweepforward in design, but tests through CFD simulation and full-scale investigation, blade root 2
Into leaf, 4 positions carry out sweepforward deflection, due to relatively close rotation center, the amount of cutting of wind is influenced it is limited, and it is main or by
4 to 3 position of blade tip progress wind cutting in leaf, to improve efficiency.
(2) blade entirety is filled partially at petiole 5, makes 5 °~8 ° of entire blade offset angle, filling direction partially is
It is contrary with sweepforward deflection, it can be with reference to shown in Fig. 2；Specifically, it is integrally rotated at the blade root 2 to blade tip 3 of blade
Angle [alpha], i.e., the impeller exterior feature line of centres of the 4 impeller exterior feature center to blade root 2, impeller exterior feature center with blade root 2 in the leaf partially after dress
It is α, α=5 °~8 ° to 1 line angle of blade axis of rotation.
After integrally carrying out dress partially to blade, blade tip is made to carry out convolution certain angle to wind cutting direction, i.e. the impeller of blade tip 3 is wide
Center is again close to the impeller exterior feature center of the blade root 2 to 1 line of blade axis of rotation；
Using inclined dress, the intensity of blade can be improved, come strength reduction caused by making up due to aforementioned sweepforward deflection.
(3) 1 ° -3 ° antecurvature is carried out to blade, blade is made more to rush at windward side, so that the air-flow of blade be made to cut more
Smoothly, to reduce noise to a certain extent.The impeller exterior feature line of centres progress that this is antecurvature from petiole 5 along the blade is curved
Song, starting altitude is plunderred in bending angle termination in front of the blade, before the sweepforward position of such blade obtains fixed angle β
It is curved.
As shown in figure 3, formula blade overall structure diagram is filled partially for a kind of front bended sweepforward of the invention, at blade root 2
It equipped with petiole 5, is fixed on the wheel hub of impeller by petiole 5, entire blade carries out filling α angle, the leaf of blade partially by petiole 5
In 4 deflected to 3 position of blade tip using sweepforward, the sweepforward at final 3 position of blade tip deflects θ angle；Blade is in blade root 2 into leaf simultaneously
4 position uses antecurvature deflection, makes in leaf 4 integrally to obtain antecurvature deflection β angle to 3 position of blade tip.
After the design, the axial flow blower thus constituted can obtain more preferably efficiency, and noise also has certain drop
Low, comprehensive performance is preferable, can satisfy the use demand of textile industry blower.
Embodiment 2: front bended sweepforward fills formula blade 2 partially；In order to sufficiently reduce the operation noise of blower.
(1) the antecurvature of β angle is carried out to blade, blade is made to rush at windward side, cut the air-flow of blade more smooth, have
Effect reduces noise.The antecurvature impeller exterior feature line of centres from petiole 5 along the blade is bent, and bending angle terminates
At the mid-height position of blade, the upper portion of blade is made to obtain whole antecurvature β angle, the β angle is 8 °~10 °.
(2) in the high a=0.5 or more of the leaf of blade, sweepforward deflection is carried out, the sweepforward deflection angle θ at final end of blade position is
3 °~5 °.
(3) filled partially at petiole 5 by blade is whole, make 5 ° of entire blade offset angle [alpha], partially dress direction for it is preceding
It is contrary to plunder deflection.
After the design, the axial flow blower thus constituted can obtain splendid low noise, while mention to a certain extent
High fan operation efficiency, comprehensive performance is preferable, equally can satisfy the low noise use demand of textile industry blower.
Embodiment 3: front bended sweepforward fills formula impeller partially.
Second part of the invention also provides a kind of impeller on the basis of providing a kind of sweepforward and filling formula blade partially, should
Impeller overall structure is as shown in Figure 4, Figure 5, includes a wheel hub 6, outer ring is provided with several petiole fixing device for installing, passes through
Several sweepforwards are filled formula blade 7 partially and are fixed in the outer rim of the wheel hub 6 by the petiole fixing device for installing, to form this
Impeller provided by inventing.Fig. 4 illustrates impeller installation internal structure of the invention, further, when as formal impeller,
It is additionally provided with the smooth outer hub shell of a smooth outer surface in windward side, to reduce resistance, improves defeated wind efficiency.
Embodiment 4: front bended sweepforward fills formula axial flow blower partially.
Part III of the invention additionally provides a kind of axial flow blower, such as Fig. 4 on the basis of providing a kind of impeller
It is shown, it is equipped with a rotation shaft mounting hole at the center of the wheel hub 6, the output shaft of drive motor is installed to by shaft coupling
On, to form an axial flow blower；The axial flow blower according to the outer diameter of wheel hub 6, the 2 position sectional dimension of blade root of blade 7, and
Fan performance requirement, generally can be set 8 blades, and blade quantity is excessively able to ascend blower discharge quantity of fan, but described simultaneously
The petiole fixing device for installing size of petiole 5 tightens, and affects the installation strength at 5 position of petiole；And blade quantity then drops less excessively
The low discharge quantity of fan of blower.
The impeller and Blade Properties of axial flow blower are checked
The present invention carries out multiple groups test, experiment to the impeller using control variate method respectively to 3 kinds of different sweepforward positions
As a result numerical simulation is carried out according to Fluid Mechanics Computation method (CFD), simulated at revolving speed 980rpm, diameter is 1600mm's
The intensity and performance of sweepforward blade axial-flow draught fan impeller device (R=320mm, L=480mm), analog result are as follows.
Peak efficiency, noise be not for same money blade uses based on sweepforward, partially installing in following table；Wherein, most
It is 79% that high efficiency, which promotes the corresponding existing blade operational efficiency of ratio,；It is 104dB that noise, which declines corresponding existing blade noise,.
1, blade is not using dress partially, when only carrying out sweepforward, CFD simulation
1.1, strength simulation: table 1
As shown in fig. 6, for using blade 1 when CFD analog intensity cloud atlas, maximum stress area 8,4 in leaf near；
As shown in fig. 7, CFD analog intensity cloud atlas when for using blade 4, maximum stress area 8,4 is attached equally in leaf
Closely；
By CFD simulation it is found that the maximum stress area 8 of blade concentrates on 4 position in leaf, that is, start the portion of sweepforward deflection
Position.
And corresponding blade strength is respectively less than the working strength of aluminium, can satisfy the safe operation demand of axial flow blower.
1.2, performance simulation: table 2
Note: above-mentioned peak efficiency promotes ratio, noise declines numerical value, relative to same money blade do not use sweepforward design and
Speech.After blade is using sweepforward design, efficiency can be improved, and noise is declined slightly.
2, the CFD analog case after blade is filled partially using sweepforward
2.1, strength simulation: table 3
As seen from the above table, after blade is using dress partially, the maximum stress intensity of blade is reduced, that is, improves the strong of blade
Degree.
2.2, performance simulation: table 4
Note: above-mentioned peak efficiency promotes ratio, noise declines numerical value, does not use sweepforward, partially installing relative to same money blade
For meter.
As seen from the above table, after blade is using dress partially, relative to when not filling partially (table 2), peak efficiency is able to ascend 1%-
2%, and noise essentially unchangedization.
3, the CFD analog case after blade is filled partially using front bended sweepforward
For the demand (corresponding embodiment 1) of the abundant operational efficiency for improving blower, 21~blade of blade 23 is devised；
For the demand (corresponding embodiment 2) of the abundant operation noise for reducing blower, 24~blade of blade 26 is devised；
Blade 21~26 uses LS aerofoil profile, section chord length b=236.11mm at blade root；Established angle θ is accordingly designed at blade root
=58. 4 °.
The data in six sections of blade profile sections are identical, but due to sweepforward angle, fill angle, the difference of antecurvature angle partially and lead to leaf
The difference of piece performance.
Using 21~blade of blade 26, it is assembled into front bended sweepforward described in embodiment 3 and fills formula impeller partially, each impeller is adopted
With 8 with money blade, it is evenly arranged on wheel hub；And it is further assembled into front bended sweepforward as described in example 4 and fills formula axis stream wind partially
Machine forms embodiment 5- embodiment 10.
The embodiment table of comparisons: table 5
CFD simulation is carried out to the complete machine of above-described embodiment 5- embodiment 10, as a result as follows:
3.1, strength simulation: table 6
| Embodiment sequence number | Blade serial number | Blade maximum stress intensity MPa |
| Embodiment 5 | Blade 21 | 75 |
| Embodiment 6 | Blade 22 | 66 |
| Embodiment 7 | Blade 23 | 24 |
| Embodiment 8 | Blade 24 | 56 |
| Embodiment 9 | Blade 25 | 58 |
| Embodiment 10 | Blade 26 | 59 |
As seen from the above table, after blade is filled partially using front bended sweepforward, the maximum stress intensity of blade 21- blade 26 is substantially not
Become, is still able to satisfy the intensity requirement of aluminium alloy vane.
3.2, performance simulation: table 7
| Embodiment sequence number | Blade serial number | Peak efficiency promotes ratio | Noise decline |
| Embodiment 5 | Blade 21 | 1.6~5% | 1.5~6dB |
| Embodiment 6 | Blade 22 | 1.6~4.6% | 1.5~6dB |
| Embodiment 7 | Blade 23 | 0.9~3.3% | 0.5~2.3dB |
| Embodiment 8 | Blade 24 | 0.5%~2.3% | 3.5~8dB |
| Embodiment 9 | Blade 25 | 0.4%~2.1% | 4~7.5dB |
| Embodiment 10 | Blade 26 | 0.5%~2.2% | 4~8dB |
Note: above-mentioned peak efficiency promotes ratio, noise declines numerical value, does not use sweepforward, partially installing relative to same money blade
For meter.
As seen from the above table, 5~embodiment of embodiment 7, improved efficiency is obvious；8~embodiment of embodiment 10, noise reduce
Obviously, design requirement is met.
In summary:
Blade strength not only can be improved to blade offset through CFD analog simulation test, moreover it is possible to improve fan performance.
Blade is using dress form installation partially, under the premise of not interfering, 20 ° of the high sweepforward of 0.4 leaf under standard condition, and blower fortune
Line efficiency is with identical blade without pretending partially than that can increase by 1.5%.
20 ° of blades of the high sweepforward of 0.4 leaf calculate its intensity, maximum stress intensity 62.6MPa after using dress partially；Compared to not having
Dress greatly reduces partially, that is, improves the safety of blade.
The present invention is on the basis of high-performance sweepforward axial-flow fan blade, by changing original blade profile, by blade top to
Direction of flow deflection, inflection point is at the high a × L of leaf, deflection angle θ angle；Meanwhile the blade is to the antecurvature angle β in windward side
Degree；Meanwhile impeller is using dress α angle partially；Specifically,
(1) in order to obtain more air-foil fan, a=0.4~0.7, θ=10 °~20 °, α=5 °~8 °, β=1 °~3 °；
(2) in order to obtain more low noise blower, a=0.5, θ=3 °~5 °, α=5 °, β=8 °~10 °.
After the design, 2%~5% is improved relative to conventional fan efficiency, while noise reduces 2~5dB.
The preferred embodiment of the present invention has been described in detail above, but the invention is not limited in institute
The embodiment stated, those skilled in the art can also make various on the premise of not violating the inventive spirit of the present invention
Equivalent variation or replacement, these equivalent modifications or replacement be all included in the scope defined by the claims of the present application.
Claims (9)
1. a kind of front bended sweepforward fills formula blade partially, which is characterized in that the blade fundamental mode be axial-flow fan blade, including blade root,
Ye Zhong, blade tip；
It is located at 0.4~0.7 high position of the blade and blade in the leaf；Ye Zhongzhi blade tip position carries out sweepforward deflection, partially
Turn gradually to be deflected using sinusoidal radian, the impeller exterior feature center at final blade tip position and the impeller exterior feature center of leaf central part position connect
Deflection angle between line, with the impeller exterior feature center at blade root position and the impeller exterior feature line of centres of leaf central part position is θ；θ≤20°；
It is integrally filled partially at the blade root to blade tip of the blade, it is contrary with sweepforward deflection for filling direction partially；Partially after dress
Impeller exterior feature center in leaf to blade root the impeller exterior feature line of centres, with the impeller exterior feature center of blade root to blade axis of rotation binding clip
Angle is α；α=5 °~8 °；
The blade root of the blade gradually carried out to leaf central part position it is antecurvature, antecurvature direction be blade windward side direction；It is described antecurvature
The impeller exterior feature line of centres from petiole along the blade is bent, and bending angle terminates the leaf central part in the blade
Position, makes the sweepforward position of the blade obtain the antecurvature of fixed angle β；β≤10°.
2. filling formula blade partially according to a kind of front bended sweepforward described in claim 1, which is characterized in that θ=10 °~20 °；α=5 °~
8°；β=1 °~3 °.
3. filling formula blade partially according to a kind of front bended sweepforward described in claim 1, which is characterized in that be located at the blade in the leaf
0.5 high position of leaf.
4. filling formula blade partially according to a kind of front bended sweepforward as claimed in claim 3, which is characterized in that θ=3 °~5 °；α=5 °；β=
8 °~10 °.
5. filling formula blade partially according to a kind of front bended sweepforward described in claim 1, which is characterized in that the blade root of the blade is into leaf
The circular rectors section design such as position use.
6. filling formula blade partially according to a kind of front bended sweepforward described in claim 5, which is characterized in that adopt at Ye Zhongzhi blade tip position
It is designed with circular rector section is become.
7. a kind of front bended sweepforward fills formula impeller partially, which is characterized in that including antecurvature as described in any one of claim 1-6
Sweepforward fills formula blade partially；It include also a wheel hub, outer ring is provided with several petiole fixing device for installing, is pacified by the petiole
Several front bended sweepforwards as described above are filled formula blade partially and are fixed in the outer rim of the wheel hub by the fixed device of dress；
It is R that above-mentioned front bended sweepforward fills the blade root of formula blade away from the distance of the axis of rotation of the impeller partially；Above-mentioned front bended sweepforward is inclined
The whole height of dress formula blade is L, R=0.43~0.66L.
8. filling formula impeller partially according to a kind of front bended sweepforward as claimed in claim 7, which is characterized in that the windward side direction of the wheel hub
It is additionally provided with the smooth outer hub shell of a smooth outer surface.
9. a kind of axial flow blower, which is characterized in that fill formula partially including the front bended sweepforward as described in any one of claim 7-8
Impeller；The quantity that the front bended sweepforward fills formula blade partially is 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910649910.5A CN110319057B (en) | 2019-07-18 | 2019-07-18 | Forward bending forward-swept offset blade, impeller and axial flow fan thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN210484188U (en) * | 2019-07-18 | 2020-05-08 | 江阴市精亚风机有限公司 | Forward-bending forward-sweeping offset-mounted blade, impeller and axial flow fan with forward-bending forward-sweeping offset-mounted blade |
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| KR200173293Y1 (en) * | 1999-09-22 | 2000-03-15 | 엘지전자주식회사 | The blade type of axial fan |
| KR200185528Y1 (en) * | 1999-12-16 | 2000-06-15 | 이상만 | Axial fan of vessel |
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| US20140248155A1 (en) * | 2011-10-07 | 2014-09-04 | Snecma | One-block bladed disk provided with blades with adapted foot profile |
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| CN104791301A (en) * | 2015-04-02 | 2015-07-22 | 佛山市南海九洲普惠风机有限公司 | Swept-curved aluminum alloy axial flow blade |
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| CN110319057B (en) | 2024-04-26 |
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