CN105257596B - Wing shaped blade of high-pressure axial fan and Counter rotating axial flow Fan thereof - Google Patents
Wing shaped blade of high-pressure axial fan and Counter rotating axial flow Fan thereof Download PDFInfo
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- CN105257596B CN105257596B CN201510623901.0A CN201510623901A CN105257596B CN 105257596 B CN105257596 B CN 105257596B CN 201510623901 A CN201510623901 A CN 201510623901A CN 105257596 B CN105257596 B CN 105257596B
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- blade
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- inlet side
- side blade
- air
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/024—Multi-stage pumps with contrarotating parts
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/305—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the pressure side of a rotor blade
Abstract
The invention discloses a kind of wing shaped blade of high-pressure axial fan and Counter rotating axial flow Fan thereof, blade includes blade and petiole, described blade is made up of leaf head, Ye Ding, leaf tail and blade root, the windward side of blade is leaf basin, the lee face of blade is leaf bow, blade is twisted shapes from blade root to leaf top section, and the leaf basin of described blade has one along blade axis perfoliate-leaf top to the arc convex of blade root. Blower fan includes inlet side blade and air side blade, inlet side blade and air side blade are driven by the individual motor being oppositely arranged respectively, described inlet side blade and blade tail and described air side blade and blade head are oppositely arranged, and described inlet side blade and blade tail and described air side blade and blade head are the straight flange being parallel to axis. The present invention improve after the short two groups of impellers of leaf structure between distance, when air inlet side impeller works, and it is between lateral lobe of giving vent to anger wheel, rotation regional air density is basically identical, hence it is evident that to improve interaction end due to the inconsistent produced interference in air flow of end distance.
Description
Technical field
The present invention relates to wing shaped blade of high-pressure axial fan and Counter rotating axial flow Fan thereof.
Background technology
Wing shaped blade of high-pressure axial fan is in actual applications, its advantage has higher total head while being embodied in high flow capacity, super remote air supplying distance is achieved, such as " wing shaped blade of high-pressure axial fan " of the patent of invention ZL2010105724711 of the present inventor; Although the shape of blade has been improved by this art solutions, hence it is evident that improve the efficiency of blower fan, reducing the Radial Flow of compressed air stream, reduce loss, its advantage has higher total head while being embodied in high flow capacity, super remote air supplying distance is achieved; But original in the axial flow blower application to rotation structure leaf not yet realize desirable result.
Summary of the invention
Axial flow blower to rotation structure finding, the afterbody of air inlet side impeller occurs in that Unequal distance is combined between lateral lobe wheel blade head with giving vent to anger, have impact on reasonability at work between two groups of impellers to a certain extent, and create some interferences in air flow, and find when using " wing shaped blade of high-pressure axial fan " of patent of invention ZL2010105724711, if by blade accelerating region projection along blade axis perfoliate-leaf top to its effect of blade root more preferably.
For this, the purpose of the present invention is to propose to the Counter rotating axial flow Fan technical scheme of a kind of wing shaped blade of high-pressure axial fan being suitable for the axial flow blower to rotation structure, by to air inlet side impeller afterbody and the lateral lobe wheel impeller improvement near blade root female parts of giving vent to anger, make air inlet side impeller (left-handed flabellum) leaf tail and lateral lobe wheel first two straight lines of (dextrorotation flabellum) leaf of giving vent to anger are substantially parallel, and shorten the distance between two groups of impellers, when air inlet side impeller (left-handed) works, and it is between lateral lobe of giving vent to anger wheel (dextrorotation), rotation regional air density is basically identical, significantly improve interaction end due to the inconsistent produced interference in air flow of end distance.
To achieve these goals, the technical scheme is that
A kind of wing shaped blade of high-pressure axial fan, including blade and petiole, described blade is made up of leaf head, Ye Ding, leaf tail and blade root, blade root is fixed on petiole, blade axis is the vertical curve that petiole centrage extends to leaf top, the windward side of blade is leaf basin, the lee face of blade is leaf bow, blade is twisted shapes from blade root to leaf top section, wherein, the leaf basin of described blade has one along blade axis perfoliate-leaf top to the arc convex of blade root, and the leaf tail of described blade or leaf head are parallel to the straight flange of described blade axis.
Scheme is further: when the leaf tail of described blade is parallel to the straight flange of described blade axis, and the leaf head of blade is bottom to be Chi Xing folic pocket district, middle part be leaf convex region, top be wing shape leaf recessed area, the curve that seamlessly transits in the one of bird's wing shape; When the leaf head of described blade is parallel to the straight flange of described blade axis, the leaf tail of blade is arc curve.
Scheme is further: described arc convex is the arc convex that the cambered surface lifted gradually to axis by the leaf caudal cambered surface lifted gradually from the first lateral axis of leaf in smoothing junction is formed.
A kind of Counter rotating axial flow Fan of wing shaped blade of high-pressure axial fan, including inlet side blade and air side blade, inlet side blade and air side blade are driven by the individual motor being oppositely arranged respectively, described inlet side blade and air side blade have blade and petiole respectively, described blade is first by leaf, leaf top, leaf tail and blade root are constituted, blade root is fixed on petiole, the axis of blade is the vertical curve that petiole centrage extends to leaf top, the windward side of blade is leaf basin, the lee face of blade is leaf bow, described inlet side blade and blade tail and described air side blade and blade head are oppositely arranged, wherein, described inlet side blade and blade tail and described air side blade and blade head are respectively parallel to the straight flange of described blade axis.
Scheme is further: the leaf head of described inlet side blade is bottom to be Chi Xing folic pocket district, middle part be leaf convex region, top be wing shape leaf recessed area, the curve that seamlessly transits in the one of bird's wing shape; The leaf tail of described air side blade is an arc-shaped side.
Scheme is further: described air side blade and blade head straight flange is to be Chi Xing folic pocket district by former bottom, middle part is leaf convex region, top is the bottom in the blade shape of wing shape leaf recessed area is extend forward in Chi Xing folic pocket district, and is connected the straight flange of formation after scabbling with middle leaf convex region, Chi Xingye recessed area, top.
Scheme is further: the leaf basin of described inlet side blade and air side blade has one respectively along blade axis perfoliate-leaf top to the arc convex accelerating region of blade root, and described arc convex is the arc convex that the cambered surface lifted gradually to axis by the leaf caudal cambered surface lifted gradually from the first lateral axis of leaf in smoothing junction is formed.
Scheme is further: to be perpendicular to axle center straight flange distance be 10 to 30mm for described inlet side blade and blade tail and first two of described air side blade and blade.
Scheme is further: described air side blade quantity is more than inlet side blade quantity at least two.
Scheme is further: described air side blade quantity is 7:6 or 11:9 or 13:11 with inlet side blade quantity ratio.
Scheme is further: the drive motor power of described air side blade is more than the drive motor power of inlet side blade.
The invention has the beneficial effects as follows: leaf structure after improvement it is evident that, left-handed flabellum leaf tail and the first two straight flange keeping parallelisms of dextrorotation flabellum leaf, and shorten the distance between two groups of impellers, when air inlet side impeller (left-handed) works, and it is between lateral lobe of giving vent to anger wheel (dextrorotation), rotation regional air density is basically identical, hence it is evident that to improve interaction end due to the inconsistent produced interference in air flow of end distance.
Be conducive to the abundant second-compressed of air-flow, be conducive to air-flow quickly through, thus improving blower pressure and efficiency further.
The length of the contour line (curve) of the blade leading edge of inlet side of the present invention blade is considerably longer than the axis of blade, it is possible to catches more air-flow and is compressed.
The folic pocket district of the blade leading edge of inlet side of the present invention blade, it is possible to effectively will be compressed further by the compressed air stream of impeller trousers, reduces the Radial Flow of compressed air stream, reduces loss.
The leaf convex region of the inlet side blade blade leading edge of the present invention, it is possible to effectively will extend over the radial air flow in folic pocket district and collect and be compressed, and can prevent airflow barrier produced by blade high-speed cruising, improves volume flow.
The blade and blade basin of the present invention along axis of runner blade perfoliate-leaf top to protruding accelerating region and the adjacent blades of blade root between formed fluidic channel, substantially play air-flow acceleration, owing to leaf pelvic curvature line is longer than leaf bow line, when air-flow passes through, effectively eliminate because air-flow is by produced upward pressure, thus improve fan efficiency.
The leaf recessed area of the inlet side blade blade leading edge of the present invention, is conducive to air-flow to blade center motion and to compress backward.
The length of leaf tail wheel profile (curve) that the air side blade and blade of the present invention is held after one's death is considerably longer than the axis of blade, and it not only prevent high capacity produced by the delay that high pressure draught is long on blade, moreover it is possible to improve air-flow rearward movement.
Below in conjunction with drawings and Examples, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is wing shaped blade of high-pressure axial fan structural representation of the present invention;
Fig. 2 is schematic cross-sectional view in the middle of wing shaped blade of high-pressure axial fan of the present invention;
Fig. 3 is that wing shaped blade of high-pressure axial fan of the present invention reverses schematic diagram;
Fig. 4 is leaf tail is the blade of high-pressure axial fan schematic diagram of straight flange;
Fig. 5 is leaf is the blade of high-pressure axial fan schematic diagram of straight flange;
Fig. 6 is Counter rotating axial flow Fan structural representation of the present invention;
Fig. 7 is inlet side of the present invention blade construction schematic diagram;
Fig. 8 is air side of the present invention blade construction schematic diagram;
Fig. 9 is inlet side of the present invention blade and air side blade relative arrangement thereof schematic diagram;
Figure 10 is that inlet side of the present invention blade and air side blade are to rotation direction schematic diagram;
Figure 11 is that air side of the present invention blade and blade head straight flange forms schematic diagram.
Detailed description of the invention
Embodiment 1:
Wing shaped blade of high-pressure axial fan, as shown in Figure 1, including blade 1 and petiole 2, described blade is by leaf head 101, leaf top 102, leaf tail 103 and blade root 104 are constituted, blade root is fixed on petiole, blade axis 105 is the vertical curve that petiole centrage extends to leaf top, as shown in Figure 2, the windward side of blade is leaf basin 106, the lee face of blade is leaf bow 107, as shown in Figure 3, blade is twisted shapes from blade root to leaf top section, wherein, as shown in Figure 2, the leaf basin of described blade has one along blade axis perfoliate-leaf top to the arc convex accelerating region 108 of blade root, as shown in Figure 4, the leaf tail of described blade or as shown in Figure 5, leaf head is parallel to the straight flange of described blade axis, described straight flange is from being parallel to the straight flange that described blade axis direction looks over, if looked over from being perpendicular to described blade axis direction, its straight flange is the lines that the leaf basin of blade becomes with leaf arch, wherein, the leaf tail of axis deviation blade is first close to leaf.
In embodiment: when the leaf tail of described blade is parallel to the straight flange of described blade axis, as shown in Figure 4, the curve that the leaf head of blade to be bottom be Chi Xing folic pocket district 1011, middle part are leaf convex region 1012, top is wing shape leaf recessed area 1013, seamlessly transit in the one of bird's wing shape; When the leaf head of described blade is parallel to the straight flange of described blade axis, as it is shown in figure 5, the leaf tail of blade is arc curve 1031.
In embodiment: described arc convex is to be lifted the cambered surface smooth connection of (parabolically) by leaf caudal gradually to axis to lift, from the first lateral axis of leaf, the arc convex that the cambered surface of (parabolically) is formed gradually.
Wherein, as shown in Figure 2, it is curved that described leaf bends 107, the formation of described leaf basin projection accelerating region is: described leaf basin is chord of foil f corresponding to leaf caudal, in by the leaf caudal arc surfaced that parabolically shape lifts gradually to axis, leaf basin opposite side has leaf arc projection g corresponding to leaf head side, the peak of leaf arc projection is in the leaf head side crossing axis, arc convex is in smoothing junction with chord of foil and has a lower arcs of recesses to leaf head, namely the joint face lifted gradually from the first lateral axis of leaf parabolically shape, above-mentioned shape defines the described protruding accelerating region along blade axis perfoliate-leaf top to blade root, the peak thickness of its protrusions is 1.8 to 2.3 times of protruding initial source point (leaf head side) thickness.
When the present embodiment flabellum windup-degree is according to impeller rotary motion, axial line speed is inconsistent, designs for ensureing flabellum entirety stress basically identical. Embodiment suitably increases flabellum windup-degree, its purpose one is to reduce the gas current friction resistance between leaf top and air duct, two is the flabellum motion jitter reducing the excessive formation of the resistance of motion of flabellum upper end, and this design is effectively improved service life of fan, reduces work noise. When adopting the blower fan work of the present invention, vane group is when rotated, what formed is a bowl-shape curve form, the compressed air stream of this vane group output is substantially along the axial-movement in tubular rectification air channel, decrease the friction of air-flow and tubular rectification air channel wall, both reduced noise, wind speed can have been improved again.
Blade is with wheel hub high-speed rotation, and from blade root, the linear velocity to leaf top is different, and the air inlet angle in each cross section is also different, in order to improve compression efficiency as far as possible, reduces loss, and the present invention adopts twist blade. The shape in top-down four cross sections of blade and windup-degree, the i.e. cross sectional shape of the cross sectional shape at leaf top, wing shape leaf convex region cross sectional shape, Chi Xing folic pocket district cross sectional shape, blade root. The relative blade root kernel of section line in cross section at its middle period top reverses 18 °, and the relative blade root kernel of section line in cross section in wing shape leaf convex region reverses 12 °, and the relative blade root kernel of section line in cross section in Chi Xing folic pocket district reverses 6 °.
In the present embodiment, the height of described wing shape leaf convex region central point and the ratio of blade height are 36:93, when blade height is 133 millimeters, the position of wing shape leaf convex region central point is distance blade root 51.48 millimeters, and the position of wing shape folic pocket district center point is distance blade root 11 millimeters. The forward position (leading edge) of leaf top cross-section is 21.8 millimeters to the distance of blade axis, the forward position (leading edge) in cross section, wing shape leaf convex region is 25.1 millimeters to the distance of blade axis, and the forward position (leading edge) in cross section, Chi Xing folic pocket district is 14.2 millimeters to the distance of blade axis. Owing to arranging convex accelerating region on the leaf pelvic surface of sacrum of blade, therefore, the cross-sectional width corresponding to the pneumatic runner of convex accelerating region decreases 2.7 millimeters than the cross-sectional width of the pneumatic runner of leading edge.
Embodiment 2:
The Counter rotating axial flow Fan of a kind of wing shaped blade of high-pressure axial fan, the present embodiment employs the wing shaped blade of high-pressure axial fan described in embodiment 1, and the content of the fan blade that the present embodiment relates to should contain the content of embodiment 1.As shown in Figure 6, including Blower Housing 3, internal side of shell is cylindrical shape, one end of cylinder is that air intake is provided with inlet side blade 4, the other end of cylinder is that air-out is provided with air side blade 5, inlet side blade and air side blade are driven by the individual motor 6 and 7 being oppositely arranged respectively, as shown in Figure 7 and Figure 8, described inlet side blade and air side blade have blade 401 respectively, 501 and petiole 402, 502, described blade is respectively: inlet side blade is by the leaf head 4011 of inlet side blade, leaf top 4012, leaf tail 4013 and blade root 4014 are constituted, air side blade is by the leaf head 5011 of air side blade, leaf top 5012, leaf tail 5013 and blade root 5014 are constituted, blade root 4014, 5014 are fixed on petiole 402, on 502, the axis 4015 of blade, 5015 is the vertical curve that petiole centrage extends to leaf top, certain petiole central axis is in electrical axis, as shown in Figure 9 and Figure 10, described inlet side blade and blade tail and described air side blade and blade head are oppositely arranged, the windward side of blade is leaf basin, the lee face of blade is leaf bow, blade is twisted shapes from blade root to leaf top section, wherein, described inlet side blade and blade tail and described air side blade and blade head are respectively parallel to the straight flange of described blade axis, described straight flange is from being perpendicular to the straight flange that motor shaft direction looks over, if looked over along motor shaft longitudinal direction, its straight flange is the lines that the leaf basin of blade becomes with leaf arch, wherein, the leaf tail of axis deviation blade is first close to leaf.
Be can clearly be seen that by Fig. 6, Fig. 9 and Figure 10: inlet side blade (left-handed flabellum) leaf tail and first two straight flanges of air side blade (dextrorotation flabellum) leaf are substantially parallel, the distance between two groups of impellers can be shortened as much as possible, when air inlet side impeller (left-handed) works, and it is between lateral lobe of giving vent to anger wheel (dextrorotation), rotation regional air density is basically identical, significantly improve interaction end due to the inconsistent produced interference in air flow of end distance
In embodiment: to be Chi Xing folic pocket district a, middle part be as it is shown in fig. 7, the leaf head of described inlet side blade is bottom leaf convex region b, top is wing shape leaf recessed area c, the curve that seamlessly transits in the one of bird's wing shape; As shown in Figure 8, the leaf tail of described air side blade is an arc-shaped side d;
The accelerating region arc convex of described inlet side blade and described air side blade, as described in example 1 above: as shown in Figure 2, it is curved that described leaf bends 107, the formation of described leaf basin projection accelerating region is: described leaf basin is chord of foil f corresponding to leaf caudal, in by the leaf caudal arc surfaced that parabolically shape lifts gradually to axis, leaf basin opposite side has leaf arc projection g corresponding to leaf head side, the peak of leaf arc projection is in the leaf head side crossing axis, arc convex is in smoothing junction with chord of foil and has a lower arcs of recesses to leaf head, namely the joint face lifted gradually from the first lateral axis of leaf parabolically shape, above-mentioned shape defines the described protruding accelerating region along blade axis perfoliate-leaf top to blade root, the peak thickness of its protrusions is 1.8 to 2.3 times of protruding initial source point (leaf head side) thickness.
In embodiment: as shown in figure 11, described air side blade and blade head straight flange 5011 is to be Chi Xing folic pocket district by former bottom, middle part is leaf convex region, top is the bottom in the blade shape of wing shape leaf recessed area is that Chi Xing folic pocket district a extends forward, and it being connected the straight flange of formation after scabbling with middle leaf convex region, Chi Xingye recessed area, top, other then keeps the basic structure of original wing shaped flabellum.
In embodiment: to be perpendicular to axle center straight flange distance be 10 to 30mm. for described inlet side blade and blade tail and first two of described air side blade and blade
In embodiment: described air side blade quantity is more than inlet side blade quantity at least two. When for two, described air side blade quantity is 7:6 or 11:9 or 13:11 with inlet side blade quantity ratio.
In embodiment, left-handed flabellum and dextrorotation flabellum all can be applied independently in axial flow blower, by coordinate before and after fixed guide vane design, be adaptable to many special requirements, independently from time its efficiency still better than conventional machine aerofoil profile flabellum.
When rotation is used by the present embodiment, the impeller blade quantity of lateral lobe of giving vent to anger wheel (dextrorotation) will more than air inlet side impeller blade quantity, such as 7:6,11:9,13:11 etc., its principle coordinates the same with movable vane and Ding Ye, it is possible to understand that the lateral lobe wheel that becomes to give vent to anger is one and air inlet side impeller opposite direction rotary motion " determining leaf ", this relative motion is for air inlet side impeller, and its theory is also set up. Owing to lateral lobe wheel of giving vent to anger primarily serves the effect of a pressurization, simultaneously work as the effect increasing flow, again owing to lateral lobe impeller blade quantity of giving vent to anger will more than air inlet side impeller blade quantity, its wind cutting rate is apparently higher than air inlet side impeller, therefore, lateral lobe of giving vent to anger wheel load is higher than air inlet side impeller, and lateral lobe of giving vent to anger under normal circumstances wheel flabellum wind cutting angle is less than air inlet side impeller, or improves lateral lobe turbin generator power of giving vent to anger under equal flabellum wind cutting angle conditions. In the present embodiment: the drive motor power of described air side blade is more than the drive motor power of inlet side blade.
When the present embodiment flabellum windup-degree is according to impeller rotary motion, axial line speed is inconsistent, designs for ensureing flabellum entirety stress basically identical. Embodiment suitably increases flabellum windup-degree, its purpose one is to reduce the gas current friction resistance between leaf top and air duct, two is the flabellum motion jitter reducing the excessive formation of the resistance of motion of flabellum upper end, and this design is effectively improved service life of fan, reduces work noise.
Being that the separation of wing shaped flabellum improves to revolving flabellum leaf about embodiment, it remains fundamental characteristics and the profile of wing shaped flabellum, and simply air inlet/outlet limb is otherwise varied, and owing to impeller direction of rotation is different, leaf bowing song is in opposite direction.
In embodiment, this axial flow blower has taper fairing 601 and 701, and internal side of shell cylindrical shape rectification air channel is a cylinder type shell structure. In actual applications, the blade of the present invention is mounted on a wheel hub, inlet side hub nose installs taper fairing 601, being used for reducing inlet loss, along trousers to blades flows, there is bigger radial flow component in charge air flow, the folic pocket district of the blade leading edge of the present invention, effectively will can be compressed further by the air-flow of impeller trousers, reduce the Radial Flow of compressed air stream, reduce loss.
In the present embodiment, the leaf convex region of described blade leading edge adopts imitative bird's wing appearance, and this leaf convex region can prevent airflow barrier produced by blade high-speed cruising, improves air mass flow. Can effectively be compressed being collected by the radial air flow in folic pocket district. The leading edge of conventional axial-flow fan blade is a straight line, and when rotating speed reaches a certain marginal value, the gas flow of blower fan will be decreased obviously, it is generally recognized that creates airflow barrier.
In the present embodiment, the leaf recessed area on blade leading edge top adopts imitative bird's wing appearance, and leaf recessed area is conducive to air-flow to compress backward to central motion, improves air mass flow.
When adopting the blower fan work of the present invention, air inlet side vane group is when rotated, what formed is a bowl-shape curve form, the compressed air stream of this vane group output is substantially along the axial-movement in tubular rectification air channel, decrease the friction of air-flow and tubular rectification air channel wall, both reduced noise, wind speed can have been improved again.
Blade is with wheel hub high-speed rotation, and from blade root, the linear velocity to leaf top is different, and the air inlet angle in each cross section is also different, in order to improve compression efficiency as far as possible, reduces loss, and the present invention adopts twist blade. The shape in top-down four cross sections of blade and windup-degree, the i.e. cross sectional shape of the cross sectional shape at leaf top, wing shape leaf convex region cross sectional shape, Chi Xing folic pocket district cross sectional shape, blade root. The relative blade root kernel of section line in cross section at its middle period top reverses 18 °, and the relative blade root kernel of section line in cross section in wing shape leaf convex region reverses 12 °, and the relative blade root kernel of section line in cross section in Chi Xing folic pocket district reverses
6°。
In the present embodiment, the height of described wing shape leaf convex region central point and the ratio of blade height are 36:93, when blade height is 133 millimeters, the position of wing shape leaf convex region central point is distance blade root 51.48 millimeters, and the position of wing shape folic pocket district center point is distance blade root 11 millimeters. The forward position (leading edge) of leaf top cross-section is 21.8 millimeters to the distance of blade axis, the forward position (leading edge) in cross section, wing shape leaf convex region is 25.1 millimeters to the distance of blade axis, and the forward position (leading edge) in cross section, Chi Xing folic pocket district is 14.2 millimeters to the distance of blade axis. Owing to arranging convex accelerating region on the leaf pelvic surface of sacrum of blade, therefore, the cross-sectional width corresponding to the pneumatic runner of convex accelerating region decreases 2.7 millimeters than the cross-sectional width of the pneumatic runner of leading edge.
Claims (7)
1. the Counter rotating axial flow Fan of a wing shaped blade of high-pressure axial fan, including inlet side blade and air side blade, inlet side blade and air side blade are driven by the individual motor being oppositely arranged respectively, described inlet side blade and air side blade have blade and petiole respectively, described blade is first by leaf, leaf top, leaf tail and blade root are constituted, blade root is fixed on petiole, blade axis is the vertical curve that petiole centrage extends to leaf top, the windward side of blade is leaf basin, the lee face of blade is leaf bow, described inlet side blade and blade tail and described air side blade and blade head are oppositely arranged, it is characterized in that, described inlet side blade and blade tail and described air side blade and blade head are respectively parallel to the straight flange of described blade axis.
2. Counter rotating axial flow Fan according to claim 1, it is characterised in that the leaf head of described inlet side blade is bottom to be Chi Xing folic pocket district, middle part be leaf convex region, top be wing shape leaf recessed area, the curve that seamlessly transits in the one of bird's wing shape; The leaf tail of described air side blade is an arc-shaped side.
3. Counter rotating axial flow Fan according to claim 1, it is characterized in that, described air side blade and blade head straight flange is to be Chi Xing folic pocket district by former bottom, middle part is leaf convex region, top is the bottom in the blade shape of wing shape leaf recessed area is extend forward in Chi Xing folic pocket district, and is connected the straight flange of formation after scabbling with middle leaf convex region, Chi Xingye recessed area, top.
4. according to the arbitrary described Counter rotating axial flow Fan of claim 1,2,3, it is characterized in that, the leaf basin of described inlet side blade and air side blade has one respectively along blade axis perfoliate-leaf top to the arc convex accelerating region of blade root, and described arc convex is the arc convex that the cambered surface lifted gradually to axis by the leaf caudal cambered surface lifted gradually from the first lateral axis of leaf in smoothing junction is formed.
5. Counter rotating axial flow Fan according to claim 1, it is characterised in that to be perpendicular to axle center straight flange distance be 10 to 30mm for described inlet side blade and blade tail and first two of described air side blade and blade.
6. according to the arbitrary described Counter rotating axial flow Fan of claim 1,2,3,5, it is characterised in that described air side blade quantity is more than inlet side blade quantity at least two.
7. Counter rotating axial flow Fan according to claim 6, it is characterised in that described air side blade quantity is 7:6 or 11:9 or 13:11 with inlet side blade quantity ratio.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510623901.0A CN105257596B (en) | 2015-09-28 | 2015-09-28 | Wing shaped blade of high-pressure axial fan and Counter rotating axial flow Fan thereof |
| GB1517638.1A GB2543062B (en) | 2015-09-28 | 2015-10-06 | Improved high-pressure axial-flow fan blade and contra-rotating axial-flow fan having the same |
| GB1614080.8A GB2545767B (en) | 2015-09-28 | 2015-10-06 | Contra-rotating axial-flow fan |
| PCT/CN2016/073410 WO2017054387A1 (en) | 2015-09-28 | 2016-02-04 | Bird's wing type high-pressure axial flow fan blade and counter-rotating axial flow fan thereof |
| TW105124817A TWI638101B (en) | 2015-09-28 | 2016-08-04 | Bird wing-shaped high pressure axial fan blade and rotating axial flow fan thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510623901.0A CN105257596B (en) | 2015-09-28 | 2015-09-28 | Wing shaped blade of high-pressure axial fan and Counter rotating axial flow Fan thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105257596A CN105257596A (en) | 2016-01-20 |
| CN105257596B true CN105257596B (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510623901.0A Expired - Fee Related CN105257596B (en) | 2015-09-28 | 2015-09-28 | Wing shaped blade of high-pressure axial fan and Counter rotating axial flow Fan thereof |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN105257596B (en) |
| GB (2) | GB2543062B (en) |
| TW (1) | TWI638101B (en) |
| WO (1) | WO2017054387A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257596B (en) * | 2015-09-28 | 2016-06-15 | 北京图正实验室科技有限公司 | Wing shaped blade of high-pressure axial fan and Counter rotating axial flow Fan thereof |
| CN107701508A (en) * | 2017-10-31 | 2018-02-16 | 广东飞鹿电器有限公司 | A kind of flabellum of industrial electric fan |
| JP7155807B2 (en) | 2018-09-25 | 2022-10-19 | 日本電産株式会社 | blower |
| CN114526253B (en) * | 2022-04-24 | 2022-07-05 | 佛山市南海九洲普惠风机有限公司 | Small boiler draught fan |
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| JPH0821398A (en) * | 1994-07-08 | 1996-01-23 | Ishikawajima Harima Heavy Ind Co Ltd | Rotor blade of compressor |
| WO2007071924A2 (en) * | 2005-12-22 | 2007-06-28 | Axiom Water Propellers Ltd. | Propeller |
| CN102003412A (en) * | 2010-12-03 | 2011-04-06 | 陈新 | Wing shaped blade of high-pressure axial fan |
| CN102003410A (en) * | 2010-12-03 | 2011-04-06 | 陈新 | High-voltage axial flow fan |
| WO2015029245A1 (en) * | 2013-09-02 | 2015-03-05 | 三菱電機株式会社 | Propeller fan, air-blowing device, and outdoor unit |
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| GB502704A (en) * | 1937-11-01 | 1939-03-23 | Thomas Dever Spencer | Improvements in fan impellers and blades therefor |
| US2682925A (en) * | 1950-01-19 | 1954-07-06 | Solar Aircraft Co | Aerodynamic improvement in fan blades |
| FR1368753A (en) * | 1963-02-06 | 1964-08-07 | Process for making wings and propellers, in particular for air and sea vehicles, as well as wings, propellers and profiled surfaces obtained by implementing this process or a similar process | |
| DE2443754A1 (en) * | 1974-09-13 | 1976-03-25 | Korfmann Gmbh Maschf | Axial flow fan with pneumatic drive - by standard air motor co-axially secured in fan casing |
| CA1199170A (en) * | 1982-12-08 | 1986-01-14 | Sheldon Affleck | Grain aeration fan |
| JPH0363440A (en) * | 1989-08-02 | 1991-03-19 | Mitsubishi Electric Corp | Counter rotating fan type ventilator |
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| CN2634159Y (en) * | 2003-08-12 | 2004-08-18 | 王加龙 | Novel transformer cooling fan |
| CN201013646Y (en) * | 2006-11-13 | 2008-01-30 | 湖北赛福机械有限公司 | Impeller shaft coupling device of disrotatory axial-flow ventilating fan |
| WO2009126996A1 (en) * | 2008-04-14 | 2009-10-22 | Atlantis Resources Corporation Pte Limited | Blade for a water turbine |
| CN102367805A (en) * | 2011-09-14 | 2012-03-07 | 大连汇通科技发展有限公司 | Counter-rotating fan |
| CN202560640U (en) * | 2012-05-28 | 2012-11-28 | 浙江上风实业股份有限公司 | Unidirectional type metro fan forging aluminum blade |
| CN105257596B (en) * | 2015-09-28 | 2016-06-15 | 北京图正实验室科技有限公司 | Wing shaped blade of high-pressure axial fan and Counter rotating axial flow Fan thereof |
-
2015
- 2015-09-28 CN CN201510623901.0A patent/CN105257596B/en not_active Expired - Fee Related
- 2015-10-06 GB GB1517638.1A patent/GB2543062B/en not_active Expired - Fee Related
- 2015-10-06 GB GB1614080.8A patent/GB2545767B/en not_active Expired - Fee Related
-
2016
- 2016-02-04 WO PCT/CN2016/073410 patent/WO2017054387A1/en active Application Filing
- 2016-08-04 TW TW105124817A patent/TWI638101B/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0821398A (en) * | 1994-07-08 | 1996-01-23 | Ishikawajima Harima Heavy Ind Co Ltd | Rotor blade of compressor |
| WO2007071924A2 (en) * | 2005-12-22 | 2007-06-28 | Axiom Water Propellers Ltd. | Propeller |
| CN102003412A (en) * | 2010-12-03 | 2011-04-06 | 陈新 | Wing shaped blade of high-pressure axial fan |
| CN102003410A (en) * | 2010-12-03 | 2011-04-06 | 陈新 | High-voltage axial flow fan |
| WO2015029245A1 (en) * | 2013-09-02 | 2015-03-05 | 三菱電機株式会社 | Propeller fan, air-blowing device, and outdoor unit |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201614080D0 (en) | 2016-09-28 |
| GB2545767A (en) | 2017-06-28 |
| GB201517638D0 (en) | 2015-11-18 |
| WO2017054387A1 (en) | 2017-04-06 |
| TW201712233A (en) | 2017-04-01 |
| GB2543062B (en) | 2017-10-04 |
| GB2545767B (en) | 2018-01-10 |
| GB2543062A (en) | 2017-04-12 |
| CN105257596A (en) | 2016-01-20 |
| TWI638101B (en) | 2018-10-11 |
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Effective date of registration: 20180627 Address after: 100007 Hutong No. 52, new Taicang, Dongcheng District, Beijing Patentee after: Chen Xin Address before: 100000, 17 floor, building 1, TEDA time center, Guanghua Road, Chaoyang District, Beijing. Patentee before: BEIJING TUZHENG LABORATORY TECHNOLOGY CO., LTD. |
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