CN109404334A - A kind of oblique flow wind wheel and the low noise diagonal flow fan including the oblique flow wind wheel - Google Patents

A kind of oblique flow wind wheel and the low noise diagonal flow fan including the oblique flow wind wheel Download PDF

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Publication number
CN109404334A
CN109404334A CN201811611460.2A CN201811611460A CN109404334A CN 109404334 A CN109404334 A CN 109404334A CN 201811611460 A CN201811611460 A CN 201811611460A CN 109404334 A CN109404334 A CN 109404334A
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CN
China
Prior art keywords
blade
wind wheel
air
flow
ducting ring
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CN201811611460.2A
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Chinese (zh)
Inventor
杨涛
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Fanshida Electromechanical Ltd By Share Ltd
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Fanshida Electromechanical Ltd By Share Ltd
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Priority to CN201811611460.2A priority Critical patent/CN109404334A/en
Publication of CN109404334A publication Critical patent/CN109404334A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666Combating 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence

Abstract

The invention discloses a kind of oblique flow wind wheels, including wind wheel hub and wind wheel blade, wind wheel blade is distributed in the outer surface of wind wheel hub around the rotation central axis line of wind wheel hub, wind wheel blade is obliquely installed by hub nose to wheel hub rear end, every bit tangent line and the angle of rotation central axis line of the wind wheel blade on axial vane type line are different, the thickness of wind wheel blade in axial direction first increases and then decreases, along wind wheel blade blade root to blade tip direction, the blade guide margin of the blade inlet edge entrance of wind wheel blade includes the camber line that at least two sections of bending directions are opposite.The invention also discloses a kind of low noise diagonal flow fans, including air-ducting ring, oblique flow wind wheel, motor, postposition impeller inducer and circular cylindrical shell with air inlet.The present invention generates lower environmental noise this purpose so that the diagonal flow fan in normal operating conditions, can consume less electric energy when reaching applying working condition requirement by optimization diagonal flow fan vane foil and postposition impeller inducer.

Description

A kind of oblique flow wind wheel and the low noise diagonal flow fan including the oblique flow wind wheel
Technical field
The present invention relates to blower fields, and in particular to a kind of oblique flow wind wheel and the low noise oblique flow wind including the oblique flow wind wheel Machine.
Background technique
In ventilation industry, blower is a kind of more universal fluid media (medium) (gas) transfer device.Fluid media (medium) passes through After fan action, pressure can obtain promotion to meet scene requirement used in connection with.
There are axial flow blower and centrifugal blower two major classes using more blower in ventilation industry at present.Axial flow blower with from The heart blower main distinction is the difference in its direction change to the fluid media (medium) of transmitting.In axial flow blower work, pass through The circulating direction of the fluid media (medium) of blower does not change, i.e., fluid media (medium) flows into axial flow blower along rotary axis direction, passes through After axial flow blower, still flowed out along rotary axis direction.The characteristics of the type blower, is that air output is big, but fluid medium boost in pressure It acts on not significant.For pipe ventilated scene, such blower needs revolving speed more higher than other types blower to be just able to satisfy The requirement of its air output.What is brought therewith is bigger noise effect.In centrifugal blower work, it is situated between by the fluid of blower The circulating direction of matter will be changed into radial direction by rotary axis direction, i.e. fluid media (medium) passes through along rotary axis direction Flow in Centrifugal Fans After centrifugal blower, centrifugal blower is flowed radially out.The type blower feature is that the boost in pressure of fluid medium is larger, but blows It measures smaller.Additionally, due to this characteristic of the change of its fluid medium flow direction, such blower is not particularly suited for pipe ventilated This kind of axial ventilation scene.
Diagonal flow fan is due to its architectural characteristic, and fan inlet end hub diameter is small, and outlet end hub diameter is big, therefore at it The effect of fluid medium is present in two aspects when work, on the one hand allows fluid media (medium) to do centrifugal movement, on the other hand allows it It axially moves;It has similarity with axial flow blower and centrifugal blower.The characteristics of combining the two because of diagonal flow fan, so that The blower can provide higher pressure, meet when not changing fluid media (medium) flowing direction under the air-supply of Wind Volume requirement The requirement of pipe ventilated scene.But export this big feature of kinetic energy after diagonal flow fan due to fluid media (medium) at present, tiltedly There are static pressure and this not high phenomenons of total pressure efficiency for flow fan.Static pressure efficiency η sta and flow rate Q, fluid media (medium) static pressure Pasta and input power P relationship are as follows: η sta=Q*Pasta/P.Now with the raising of quality of the life, it is applied to household ring Pipe ventilated scene in border, such as central ventilation system, air-cooled ducted air conditioner, kitchen ventilator ventilation more universal, therefore noise problem Also it becomes increasingly conspicuous, market needs also to become to be increasingly urgent to for low noise ventilation equipment.
Application No. is 201620148601.1 patents to disclose a kind of screw ventilation and heat source unit.Propeller Formula blower has configuration in the wheel hub in center and the multiple blades being arranged in around wheel hub.The trailing edge portion of multiple blades has Have 2 groups or more than 2 groups, using recess portion and protrusion as 1 group of outline portion, the recess portion is reverse with the outflow direction of air Ground bent recess, the protrusion are connected with the peripheral side of recess portion and towards the outflow directions of air.Configuration is in blade peripheral side The depth dimensions of second recess portion contained in second outline portion are greater than configuration institute in the first profile part of blade inner circumferential side The depth dimensions of the first recess portion contained.Trailing edge in the patent is cooperated by recess portion and protrusion realizes the work for reducing noise With, but apply in diagonal flow fan and not can solve the not high problem of static pressure and total pressure efficiency.
A kind of oblique flow wind wheel is disclosed application No. is 201710400928.2 patent and with its air conditioner, oblique flow wind Wheel includes: wheel hub and multiple blades.Wheel hub is that the circular arc outer diameter of hollow revolving body and its air intake is D, multiple spacing with blades Be provided on the periphery wall of wheel hub, blade include contacted with the periphery wall of wheel hub first while, with first while face the second side, Be connected to first at second between and the outlet air end of adjacent hub third while, be connected to first while and the second side between and 4th side of the air intake of adjacent hub, it is assumed that with second while and two endpoints of intersection point and the first side when the 4th where it is flat Face is benchmark face, and blade is in the projection on datum level, first while, second while, third while the 4th while two endpoints between Linear dimension be respectively L1, L2, L3 and L4, wherein L1=1.1D, L2=1.2D, L3=0.8D, L4=0.6D.According to this hair Bright oblique flow wind wheel, air quantity is big, noise is small.Blade in the patent only carries out designed arc-shaped appearance on the second side, and third side is conventional Design, not can solve big outlet kinetic energy after diagonal flow fan and static pressure and the not high problem of total pressure efficiency.
Summary of the invention
In order to solve the above-mentioned technical problem, an object of the present invention is to provide a kind of oblique flow wind wheel, by optimizing oblique flow The blade profile of wind wheel blade on wind wheel, so that the diagonal flow fan in normal operating conditions, can reach applying working condition requirement When consume less electric energy, generate lower environmental noise.
For achieving the above object, the technical solution adopted by the present invention is as follows:
A kind of oblique flow wind wheel, including wind wheel hub and wind wheel blade, rotation of the wind wheel blade around the wind wheel hub Turn the outer surface that central axes are distributed in the wind wheel hub, the wind wheel blade is set by hub nose to wheel hub rear end inclination It sets, every bit tangent line and the angle of the rotation central axis line of the wind wheel blade on axial vane type line are different, institute State the thickness of wind wheel blade in axial direction first increases and then decreases, the i.e. wind wheel blade as described in extreme direction after hub nose to wheel hub Thickness first increases and then decreases, close to hub nose wind wheel blade one end be blade inlet edge, close to wheel hub rear end wind wheel leaf The piece other end is trailing edge, and fluid media (medium) flows to trailing edge, the thickness of the wind wheel blade intermediate region by blade inlet edge Greater than the thickness of blade inlet edge and trailing edge;In order to largely reduce fan noise, along the wind wheel blade blade root extremely Blade tip direction, the blade guide margin of the blade inlet edge entrance of the wind wheel blade include the arc that at least two sections of bending directions are opposite Line.Two sections of camber lines are bent towards away from wind wheel blade center molded line in opposite direction respectively i.e. on blade guide margin.Wind wheel leaf The aerofoil profile that the thickness change of piece is similar to wing changes.This variation tendency enables blower to provide when working for fluid media (medium) Bigger pressure and it is unlikely cause significant flow separation phenomenon, to improve fan efficiency, reduce flow separation phenomenon energy simultaneously The generation being vortexed in fluid is enough reduced, to reduce eddy current crack ingredient in fan noise.
Preferably, the blade guide margin of the blade inlet edge entrance of the wind wheel blade camber line opposite by two sections of bending directions Composition.
Preferably, the blade tip established angle of the wind wheel blade is 20 ° -40 °.Setting ensures that oblique flow wind wheel works in conjunction in this way Section is managed, does not make fluid media (medium) in the premature generation flow separation phenomenon in oblique flow wind wheel blade surface.
Preferably, the blade guide margin includes two sections of opposite camber lines of bending direction, and two sections of camber lines are in the blade root Swivel point between the blade tip connects, and swivel point is the tie point of both ends camber line, and blade guide margin is curved swivel point two sides Qu Fangxiang is different and away from each other, and camber line described in both ends is tangent in the swivel point.
It is furthermore preferred that swivel point upper end is curved away from the direction of the wind wheel blade upper surface close to the camber line of blade tip Song, swivel point upper end are bent close to the camber line of blade root away from the direction of the wind wheel blade lower surface.
Preferably, the blade guide margin the swivel point top close to the blade tip camber line radially towards blade tip Protruded outside toward the wind wheel blade, the blade guide margin swivel point lower part close to the blade root camber line radially towards Blade root is toward the wind wheel blade inner recess.I.e. along blade root to swivel point direction, blade guide margin first towards swivel point direction aweather Impeller blade inner recess, after swivel point, along swivel point to blade tip direction, blade guide margin is toward protruding outside wind wheel blade.
Compound bending makes blade guide margin form the streamlined guide margin of curvature, while two sections of camber line link positions on blade guide margin Swivel point to wind wheel blade inner recess, the above design has following contribution to noise is reduced;When diagonal flow fan work, Blade guide margin of the fluid media (medium) from the blade inlet edge of wind wheel blade flows into, and flows out from trailing edge after wind wheel blade, The time that every bit is contacted with fluid media (medium) at blade guide margin is all different, thus, by being contacted between blade guide margin and fluid media (medium) And the sound wave generated is caused the phase difference between sound wave that can reduce the noise being induced by it there is also the regular hour is poor by the time difference Amplitude is substantially reduced, to reduce diagonal flow fan overall noise.And often the sound wave caused by the same time is easy superposition Make more to concentrate and reach higher intensity, and causes the increase of overall noise.And the streamlined guide margin oblique flow of traditional non-curvature Blower, when work, can generate short and high noise peak in shorter noise frequency band.And heretofore described curvature flow The oblique flow wind wheel of line style guide margin at work, then can generate lesser noise in a broader frequency band.
Preferably, the distance between the swivel point and the blade tip H1 are the 30%- of the Leaf Conductance edge lengths H 50%.
The second object of the present invention is to provide a kind of low noise diagonal flow fan, by optimization postpositional blade impeller inducer and lead Solar or lunar halo produces so that the diagonal flow fan in normal operating conditions, can consume less electric energy when reaching applying working condition requirement Raw lower environmental noise this purpose.
For achieving the above object, the technical solution adopted by the present invention is as follows:
A kind of low noise diagonal flow fan, including air-ducting ring, oblique flow wind wheel, motor and circular cylindrical shell with air inlet, The air-ducting ring, oblique flow wind wheel, motor are mounted in the circular cylindrical shell, the rotor of the oblique flow wind wheel and the motor The wind wheel hub of end connection, oblique flow wind wheel is connected by the rotor-end of screw and motor, outside the air inlet of the air-ducting ring Circle side wall is connect with one end of the circular cylindrical shell, and the oblique flow wind wheel is placed in the inner ring of the air-ducting ring, the oblique flow wind Wheel is oblique flow wind wheel described in any of the above embodiments, and the diagonal flow fan further includes postposition impeller inducer, the postposition impeller inducer Including impeller inducer wheel hub, multi-disc the flow-guiding stator blade blade uniformly distributed around the impeller inducer wheel hub, the impeller inducer wheel hub with The stationary end of the motor connects, and the blade tip of the flow-guiding stator blade blade is connected with the inner wall of the circular cylindrical shell.Work as oblique flow Blower work when, fluid media (medium) after oblique flow wind wheel its can generate biggish circumferential speed, complete blower efficiency is mentioned It rises without benefit.The flow-guiding stator blade blade on postposition impeller inducer is flowed to after oblique flow wind wheel when fluid media (medium), it can be by the part The axial velocity of fluid media (medium) is converted into its static pressure, to improve the static pressure efficiency of diagonal flow fan.
Preferably, the diameter of the air-ducting ring is first gradually reduced and then is gradually expanded in the form of continuous flow line along axial direction.It leads The both ends of solar or lunar halo are air-ducting ring tail portion, and wherein the air-ducting ring tail portion of one end is air inlet, and the air-ducting ring tail portion of the other end is outlet Mouthful, by air inlet to gas outlet direction, the diameter of air-ducting ring is first gradually reduced and then is gradually increased again, the diameter change of air-ducting ring It is to be changed in a manner of streamline arc, the every bit on the air-ducting ring inner wall difference radial section is along axial tangent line and institute The angle for stating the central axes of air-ducting ring is all different, and makes air-ducting ring inner wall in round and smooth curved surface.The diameter of the air-ducting ring is minimum Place is diameter turning point, and the air-ducting ring inner walls of at the diameter turning point and its two sides is to air-ducting ring central concave.This wind-guiding Circle sweeping style can play the role of uniform incoming flow, reduce air-flow and enter the turbulent flow after air-ducting ring in incoming flow from air-ducting ring air inlet Ingredient.On the one hand, uniform incoming flow existing for less turbulent flow can improve the operational efficiency of diagonal flow fan;On the other hand, turbulent to subtract Major general understands turbulence noise ingredient in diagonal flow fan operation, has larger benefit to blower overall noise is reduced.
Preferably, reinforcing rib is arranged in the outer wall of the air-ducting ring, and reinforcing rib plays booster action to air-ducting ring peripheral wall, described Boss portion is set at the outer wall of air-ducting ring tail portion, the boss portion is that the air-ducting ring air inlet extends radially outward to be formed, Mating groove is arranged in one end of the circular cylindrical shell, and the height of the boss portion is less than or equal to the mating groove, the boss portion It is plugged on the connection that the inner wall of the air-ducting ring air inlet and the circular cylindrical shell is realized in the mating groove, the circular cylindrical shell The inner wall for being greater than the circular cylindrical shell and the postposition impeller inducer with the inner diameter of air-ducting ring air outlet outer wall junction is straight Diameter, in this way setting can play position-limiting action to air-ducting ring, the outer diameter of the boss portion be greater than it is described state air-ducting ring into The outer diameter in air port, guarantee air-ducting ring and circular cylindrical shell are bonded.
It preferably, is the outer of the air-ducting ring with the air-ducting ring air inlet distance L at the wind-guiding loop diameter minimum The 3%-15% of diameter D, diameter D1 is the 65%-90% of the air-ducting ring outer diameter D at the air-ducting ring minimum.The air-ducting ring Outer diameter D is the outer diameter of the air-ducting ring air inlet, is herein air-ducting ring outer diameter maximum.
It is further preferred that being the outer of the air-ducting ring with the air-ducting ring air inlet distance L at the wind-guiding loop diameter minimum The 5%-10% of diameter D, diameter D1 is the 70%-85% of the air-ducting ring outer diameter D at the air-ducting ring minimum.Minimum diameter is at this Can be unlikely to excessive reduction flow area in preferred scope while playing the role of uniform incoming flow, it is ensured that through-flow medium with compared with Low flow velocity flows through diagonal flow fan to reduce its tubulence energy.
Preferably, the number of the number of the flow-guiding stator blade blade and wind wheel blade prime number each other.To avoid generation Noise fundamental frequency superposition phenomenon, to cause peak value more outstanding in noise frequency.
Preferably, continuous bulge-structure is set at the trailing edge of the flow-guiding stator blade blade.By the way that continuous protrusion is arranged Structure can reduce the ingredient of eddy current crack in diagonal flow fan noise to a certain degree.When fluid media (medium) reaches at flow-guiding stator blade blade When, due to flow separation phenomenon there are more whirlpool, these whirlpools not of uniform size are also easy to produce vortex and make an uproar in flow process Sound.Continuous bulge-structure at the trailing edge of flow-guiding stator blade blade can play the role of destroying these whirlpools, by fluid media (medium) In some larger-size whirlpools destroy to form a series of lesser whirlpool of sizes, the intensity of eddy current crack is reduced with this.
It is furthermore preferred that the continuous bulge-structure is dentalation or wavy shaped configuration.
It is furthermore preferred that the continuous bulge-structure is dentalation, dentalation includes multiple teeth, the dentalation On each teeth along the facewidth M1 of trailing edge to blade inlet edge direction be the blade root along flow-guiding stator blade blade to blade tip direction Guide vane height M 5%-15%, tooth high M2 of each teeth along blade root to blade tip direction on the dentalation is guide vane The 10%-20% of the M of height M.
It is furthermore preferred that each teeth include vertical edges and bevel edge, the point that vertical edges and bevel edge intersect is the tooth tip of teeth, phase The range for the angle a2 that the bevel edge and vertical edges of adjacent two teeth are formed is 30 ° -90 °.
Compared with the existing technology, the present invention achieves beneficial technical effect:
The characteristic that diagonal flow fan disclosed by the invention has the high air quantity of pressure big combines axial flow blower and centrifugal blower Advantage divulges information this kind of operative scenario with very big practicability in pipe pressurizing.Its vane type line of oblique flow wind wheel passes through in diagonal flow fan Optimization design is crossed, to largely reduce the flow separation phenomenon of blade surface, on the one hand, reduce diagonal flow fan flowing damage It loses, achievees the purpose that improve fan efficiency;On the other hand, the reduction of wall surface flow separation can reduce the production of fluid burbling noise It is raw;The blade guide margin shape of wind wheel blade is designed as flow curvature type, using the guide margin molded line of the preferred design, can make oblique flow wind At work, different location and incoming flow act on forming the time difference machine on the blade inlet edge of wind wheel blade, thus by traditional oblique flow wind Taking turns the noise that amplitude caused by un-flexed type guide margin is high and frequency band is narrow, to be converted into one continuously distributed in a wider frequency rate band width It is worth lower noise, so that it is horizontal to reduce oblique flow wind wheel overall noise.
The air-ducting ring in circular cylindrical shell is designed by preferred rotating cross section so that diagonal flow fan air-ducting ring into Incoming flow homogenization at air port, avoids causing diagonal flow fan inlet distortion, improves fan operation efficiency.Turbulent flow in incoming flow simultaneously Ingredient is substantially reduced, and turbulence noise also decreases.It is logical that the present invention is mounted on the postposition impeller inducer after oblique flow wind wheel Preferred flow-guiding stator blade vane type line design is crossed, it can be by there are larger ingredients in the fluid media (medium) after the effect of oblique flow wind wheel Circumferential speed is converted into its static pressure, to improve static pressure efficiency.Continuous bulge-structure at the trailing edge of flow-guiding stator blade blade The ingredient of eddy current crack in diagonal flow fan noise can be reduced to a certain degree.When fluid media (medium) reaches at flow-guiding stator blade blade, by In flow separation phenomenon there are more whirlpool, these whirlpools not of uniform size are also easy to produce eddy current crack in flow process.Water conservancy diversion Continuous bulge-structure at the trailing edge of stator blade blade can play the role of destroying these whirlpools, by rulers some in fluid media (medium) Very little biggish whirlpool is destroyed to form a series of lesser whirlpool of sizes, and the intensity of eddy current crack is reduced with this.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of oblique flow wind wheel of the present invention;
Fig. 2 is the structural schematic diagram of wind wheel blade in a kind of oblique flow wind wheel of the present invention;
Fig. 3 is a kind of structural schematic diagram of low noise diagonal flow fan of the present invention;
Fig. 4 is the structural schematic diagram of air-ducting ring in a kind of low noise diagonal flow fan of the present invention;
Fig. 5 is the structural schematic diagram of flow-guiding stator blade blade in a kind of low noise diagonal flow fan of the present invention.
Appended drawing reference:
11. air-ducting ring;11A. air-ducting ring peripheral wall;11B. air-ducting ring tail portion;12. motor;12A. rotor-end;12B. is static End;13. oblique flow wind wheel;13A. wind wheel hub;13B. wind wheel blade;13C. blade profile middle line;13D. hub nose;13E. straight line; 13F. wheel hub rear end;13G. wind wheel blade blade tip;13H. blade lagging edge;13I. wind wheel blade blade root;The first camber line of 13J.;13K. Swivel point;The second camber line of 13L.;13M. blade guide margin;14. screw;15. postposition impeller inducer;15A. impeller inducer wheel hub; 15B. flow-guiding stator blade blade;15C. dentalation;15D. flow-guiding stator blade blade tip.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments to the present invention It is further elaborated, but the scope of protection of present invention is not limited to following specific embodiments.
Oblique flow wind wheel embodiment 1
As illustrated in fig. 1 and 2, a kind of oblique flow wind wheel 13, including wind wheel hub 13A and wind wheel blade 13B, the wind wheel blade 13B is distributed in the outer surface of the wind wheel hub 13A around the rotation central axis line Z of the wind wheel hub 13A, fluid media (medium) from The hub nose 13D of wind wheel hub 13A flows to wheel hub rear end 13F, after the wind wheel blade 13B is by hub nose 13D to wheel hub End 13F is obliquely installed, every bit tangent line and the rotation central axis line Z of the wind wheel blade 13B on axial vane type line Angle it is different, in the vane type line of wind wheel blade 13B multiple incenters line formed blade profile middle line 13C be the wing Type middle line, the every bit tangent line and the angle of the rotation central axis line Z on profile mean line are different.The wind wheel blade 13B's Thickness in axial direction first increases and then decreases, i.e. the wind wheel blade 13B's as described in hub nose 13D to the wheel hub rear end direction 13F Thickness first increases and then decreases is blade inlet edge close to one end wind wheel blade 13B of hub nose 13D, close to wheel hub rear end 13F's The wind wheel blade 13B other end is trailing edge, and fluid media (medium) flows to trailing edge by blade inlet edge, in the wind wheel blade 13B Between region thickness be greater than blade inlet edge and trailing edge thickness.The thickness change of wind wheel blade 13B is similar to the wing of wing Type variation.This variation tendency enables blower to provide bigger pressure when working for fluid media (medium) and unlikely causes significantly to flow Dynamic segregation phenomenon, to improve fan efficiency, reducing flow separation phenomenon can reduce the generation being vortexed in fluid simultaneously, thus Reduce eddy current crack ingredient in fan noise.
Wind wheel blade blade root 13I is blade and wheel hub connecting place, and wind wheel blade blade tip 13G is opposite with blade root and is located at blade Away from wheel hub farthest, in order to largely reduce fan noise, along the wind wheel blade blade root 13I to blade tip direction, the wind The blade guide margin 13M of the blade inlet edge entrance of impeller blade 13B includes the camber line that at least two sections of bending directions are opposite, blade guide margin 13M is the line of wind wheel blade blade tip 13G and wind wheel blade blade root 13I along the edge wind wheel blade 13B of blade inlet edge entrance, The line of the wind wheel blade blade tip 13G and wind wheel blade blade root 13I in trailing edge exit are blade lagging edge 13H, fluid media (medium) It flows into from blade guide margin 13M from blade lagging edge 13H and flows out.The upper two sections of camber lines of blade guide margin 13M are respectively towards away from the wind wheel Blade 13B center molded line is bent in opposite direction.The blade guide margin 13M of the blade inlet edge entrance of the wind wheel blade 13B by The opposite camber line composition of two sections of bending directions.
As shown in Fig. 2, the 13M of blade guide margin described in the present embodiment includes two sections of opposite camber lines of bending direction, two sections of institutes It states swivel point 13K of the camber line between the wind wheel blade blade root 13I and the wind wheel blade blade tip 13G to connect, swivel point 13K It is the tie point of both ends camber line, bending direction of the blade guide margin 13M in the two sides swivel point 13K is different and away from each other, two sections of institutes It is tangent in the swivel point 13K to state camber line.The upper end swivel point 13K close to wind wheel blade blade tip 13G the first camber line 13J towards remote Direction bending from the upper surface the wind wheel blade 13B, second camber line of the upper end swivel point 13K close to wind wheel blade blade root 13I 13L is bent away from the direction of the lower surface the wind wheel blade 13B.
The blade guide margin 13M is on the top the swivel point 13K close to the first camber line of the wind wheel blade blade tip 13G Radially towards wind wheel blade blade tip 13G toward protruding outside the wind wheel blade 13B, the blade guide margin 13M is being turned round 13J The lower part point 13K close to the wind wheel blade blade root 13I the second camber line 13L radially towards wind wheel blade blade root 13I toward institute State wind wheel blade 13B inner recess.I.e. along wind wheel blade blade root 13I to the direction swivel point 13K, blade guide margin 13M is first towards returning The direction turning point 13K is to wind wheel blade 13B inner recess, after swivel point 13K, along swivel point 13K to wind wheel blade blade tip 13G Direction, blade guide margin 13M is toward protruding outside wind wheel blade 13B.
Compound bending makes blade guide margin 13M form the streamlined guide margin of curvature, while two sections of camber lines on blade guide margin 13M connect The swivel point 13K of position is met to wind wheel blade 13B inner recess, the above design has following contribution to noise is reduced;When oblique When flow fan works, blade guide margin 13M of the fluid media (medium) from the blade inlet edge of wind wheel blade 13B is flowed into, by wind wheel blade It is flowed out from trailing edge after 13B, the time that every bit is contacted with fluid media (medium) at blade guide margin 13M is all different, thus, by It contacts between blade guide margin 13M and fluid media (medium) and the sound wave that generates is there is also the regular hour is poor, is caused between sound wave by the time difference Phase difference can reduce being substantially reduced for the noise amplitude being induced by it, to reduce diagonal flow fan overall noise.And often exist Sound wave caused by the same time, which is easy superposition, to be made more to concentrate and reach higher intensity, and causes the increase of overall noise. And the streamlined guide margin diagonal flow fan of traditional non-curvature, when work, can generate short and high make an uproar in shorter noise frequency band Sound peak value.And the oblique flow wind wheel 13 of the heretofore described streamlined guide margin of curvature is at work, then it can be in a broader frequency band It is interior to generate lesser noise.
Oblique flow wind wheel embodiment 2
As shown in Fig. 2, the embodiment only describes and the difference of above-described embodiment, remaining technical characteristic and above-mentioned implementation Example is identical.In the present embodiment, the blade tip established angle of wind wheel blade 13B described in the present embodiment is 20 ° -40 °, blade tip established angle The folder between straight line 13E and rotation central axis line Z vertical line Y between blade profile middle line 13C two-end-point at connection wind wheel blade blade tip 13G Angle.Setting ensures that oblique flow wind wheel 13 works in reasonable interval in this way, does not make fluid media (medium) too early in 13 blade surface of oblique flow wind wheel Generation flow separation phenomenon.As shown in Fig. 2, the embodiment only describes and the difference of above-described embodiment, remaining technology spy It levies same as the previously described embodiments.In the present embodiment, the distance between the swivel point 13K and the wind wheel blade blade tip 13G H1 is the 30%-50% of the blade guide margin 13M length H.
Diagonal flow fan embodiment 1
As shown in figure 3, a kind of low noise diagonal flow fan, including the air-ducting ring 11, oblique flow wind wheel 13, electronic with air inlet Machine 12 and circular cylindrical shell, the air-ducting ring 11, oblique flow wind wheel 13, motor 12 are mounted in the circular cylindrical shell, oblique flow wind wheel 13 be the oblique flow wind wheel 13 in above-mentioned oblique flow wind wheel embodiment 1 and embodiment 2, the oblique flow wind wheel 13 and the motor 12 The wind wheel hub 13A of rotor-end 12A connection, oblique flow wind wheel 13 is connect by screw 14 with the rotor-end 12A of motor 12, described The outer ring side wall of the air inlet of air-ducting ring 11 is connect with one end of the circular cylindrical shell, and the oblique flow wind wheel 13 is placed in the wind-guiding In the inner ring of circle 11, the oblique flow wind wheel 13 is the oblique flow wind wheel 13 in above-described embodiment, and the diagonal flow fan further includes postposition Impeller inducer 15, postposition impeller inducer 15 are located at the rear of the oblique flow wind wheel 13, and fluid media (medium) flows after oblique flow wind wheel 13 To postposition impeller inducer 15, the postposition impeller inducer 15 includes impeller inducer wheel hub 15A, multi-disc around the impeller inducer wheel hub 15A uniformly distributed flow-guiding stator blade blade 15B, the impeller inducer wheel hub 15A are connect with the stationary end 12B of the motor 12, institute The flow-guiding stator blade blade tip 15D for stating flow-guiding stator blade blade 15B is connected with the inner wall of the circular cylindrical shell.When diagonal flow fan work, Postposition impeller inducer 15 remains stationary, and oblique flow wind wheel 13 realizes rotation under the rotation of the rotor-end 12A of motor 12, and fluid is situated between Matter enters the wind wheel blade 13B flowed on oblique flow wind wheel 13 from the air inlet of air-ducting ring 11, and fluid media (medium) passes through oblique flow wind wheel 13 It can generate biggish circumferential speed afterwards, to the promotion of complete blower efficiency without benefit.When fluid media (medium) passes through oblique flow wind wheel The flow-guiding stator blade blade 15B on postposition impeller inducer 15 is flowed to after 13, can convert the axial velocity of the segment fluid flow medium to Its static pressure, to improve the static pressure efficiency of diagonal flow fan.The number of the flow-guiding stator blade blade 15B and the wind wheel blade 13B Number prime number each other.To avoid noise fundamental frequency superposition phenomenon is generated, to cause peak value more outstanding in noise frequency.
As shown in figure 4, the diameter of the air-ducting ring 11 is first gradually reduced in the form of continuous flow line along axial direction and then is gradually expanded Greatly.The both ends of air-ducting ring 11 are air-ducting ring tail portion 11B, and wherein the air-ducting ring tail portion 11B of one end is air inlet, the wind-guiding of the other end Circle tail portion 11B is gas outlet, and by air inlet to gas outlet direction, the diameter of air-ducting ring 11 is first gradually reduced and then gradually increases again Greatly, the diameter change of air-ducting ring 11 is changed in a manner of streamline arc, on the 11 inner wall difference radial section of air-ducting ring Angle of the every bit along axial tangent line and the central axes of the air-ducting ring 11 be all different, it is in round and smooth for making 11 inner wall of air-ducting ring Curved surface.It is diameter turning point, the air-ducting ring of at the diameter turning point and its two sides at the diameter minimum of the air-ducting ring 11 11 inner walls are to 11 central concave of air-ducting ring.This 11 sweeping style of air-ducting ring can play the role of uniform incoming flow, reduce air-flow from 11 air inlet of air-ducting ring enters the turbulent ingredient after air-ducting ring 11 in incoming flow.On the one hand, uniform incoming flow energy existing for less turbulent flow Improve the operational efficiency of diagonal flow fan;On the other hand, turbulent reduction will turbulence noise ingredient in diagonal flow fan operation, to subtracting Small blower overall noise has larger benefit.It is with the 11 air inlet distance L of air-ducting ring at the 11 diameter minimum of air-ducting ring The 3%-15% of the outer diameter D of the air-ducting ring 11, the minimum place diameter D1 of the air-ducting ring 11 is 11 outer diameter D of air-ducting ring 65%-90%.The outer diameter D of the air-ducting ring 11 is the outer diameter of the air inlet of the air-ducting ring 11, is herein air-ducting ring 11 Outer diameter maximum.
Reinforcing rib is arranged in the outer wall of the air-ducting ring 11, and reinforcing rib plays booster action to air-ducting ring peripheral wall 11A, described to lead Boss portion is set at the outer wall of solar or lunar halo tail portion 11B, and the boss portion is that 11 air inlet of air-ducting ring extends radially outward shape At mating groove is arranged in one end of the circular cylindrical shell, and the height of the boss portion is less than or equal to the mating groove, the boss Portion is plugged on the connection that the inner wall of 11 air inlet of air-ducting ring and the circular cylindrical shell is realized in the mating groove, the cylinder Shell and the inner diameter of 11 air outlet outer wall junction of air-ducting ring are greater than the circular cylindrical shell and the postposition impeller inducer 15 Inner diameter, setting in this way can play position-limiting action to air-ducting ring 11, and the outer diameter of the boss portion is greater than described state The outer diameter of the air inlet of air-ducting ring 11, guarantee air-ducting ring 11 are bonded with circular cylindrical shell.
As shown in figure 5, continuous bulge-structure is arranged at the trailing edge of the flow-guiding stator blade blade 15B.Connected by setting Continuous bulge-structure can reduce the ingredient of eddy current crack in diagonal flow fan noise to a certain degree.When fluid media (medium) reaches flow-guiding stator blade leaf When at piece 15B, due to flow separation phenomenon there are more whirlpool, these whirlpools not of uniform size are also easy to produce in flow process Eddy current crack.Continuous bulge-structure at the trailing edge of flow-guiding stator blade blade 15B can play the role of destroying these whirlpools, will In fluid media (medium) some larger-size whirlpools are destroyed to form a series of lesser whirlpool of sizes, reduce eddy current crack with this Intensity.
The continuous bulge-structure is one of dentalation 15C or wavy shaped configuration, and the present embodiment is preferred, described Continuous bulge-structure is dentalation 15C, and dentalation 15C includes multiple teeth, each teeth on the dentalation 15C Facewidth M1 along trailing edge to blade inlet edge direction is along the flow-guiding stator blade blade root of flow-guiding stator blade blade 15B to flow-guiding stator blade leaf Each teeth on the 5%-15% of the guide vane height M in the sharp direction 15D, the dentalation 15C are along flow-guiding stator blade blade root to leading The 10%-20% for the M that the high M2 of tooth for flowing the direction stator blade blade tip 15D is guide vane height M.
Diagonal flow fan embodiment 2
The embodiment only describes and the difference of above-described embodiment, remaining technical characteristic is same as the previously described embodiments.? In the present embodiment, each teeth include vertical edges and bevel edge, and the point that vertical edges and bevel edge intersect is the tooth tip of teeth, two neighboring The range for the angle a2 that the bevel edge and vertical edges of teeth are formed is 30 ° -90 °.
Diagonal flow fan embodiment 3
The embodiment only describes and the difference of above-described embodiment, remaining technical characteristic is same as the previously described embodiments.? It with the 11 air inlet distance L of air-ducting ring is the air-ducting ring 11 at the 11 diameter minimum of air-ducting ring in the present embodiment The 5%-10% of outer diameter D, the minimum place diameter D1 of the air-ducting ring 11 for 11 outer diameter D of air-ducting ring 70%-85%.It is minimum straight Diameter can be unlikely to excessive reduction flow area in the preferred scope while playing the role of uniform incoming flow, it is ensured that through-flow Jie Matter flows through diagonal flow fan with lower flow velocity to reduce its tubulence energy.
The characteristic that diagonal flow fan of the invention has the high air quantity of pressure big combines the excellent of axial flow blower and centrifugal blower Point divulges information this kind of operative scenario with very big practicability in pipe pressurizing.Its vane type line of oblique flow wind wheel 13 passes through in diagonal flow fan Optimization design is crossed, to largely reduce the flow separation phenomenon of blade surface, on the one hand, reduce diagonal flow fan flowing damage It loses, achievees the purpose that improve fan efficiency;On the other hand, the reduction of wall surface flow separation can reduce the production of fluid burbling noise It is raw;The blade guide margin 13M shape of wind wheel blade 13B is designed as flow curvature type, using the guide margin molded line of the preferred design, can make At work, different location and incoming flow act on forming the time difference diagonal flow fan on the blade inlet edge of wind wheel blade 13B, to will pass The noise that amplitude is high caused by the system un-flexed type guide margin of oblique flow wind wheel 13 and frequency band is narrow be converted into one it is continuously distributed one compared with The broadband band lower noise of amplitude, so that it is horizontal to reduce by 13 overall noise of oblique flow wind wheel.
The air-ducting ring 11 in circular cylindrical shell is designed by preferred rotating cross section, so that diagonal flow fan is in air-ducting ring The incoming flow of 11 air inlets homogenizes, and avoids causing diagonal flow fan inlet distortion, improves fan operation efficiency.Simultaneously in incoming flow Turbulent ingredient is substantially reduced, and turbulence noise also decreases.The present invention is mounted on the postposition water conservancy diversion after oblique flow wind wheel 13 Impeller 15, can will be by the fluid media (medium) after the effect of oblique flow wind wheel 13 by preferred flow-guiding stator blade blade 15B Profile Design There are the circumferential speeds of larger ingredient to be converted into its static pressure, to improve static pressure efficiency.The trailing edge of flow-guiding stator blade blade 15B The continuous bulge-structure at place can reduce the ingredient of eddy current crack in diagonal flow fan noise to a certain degree.When fluid media (medium) reaches water conservancy diversion When at stator blade blade 15B, due to flow separation phenomenon there are more whirlpool, these whirlpools not of uniform size in flow process, It is also easy to produce eddy current crack.Continuous bulge-structure at the trailing edge of flow-guiding stator blade blade 15B, which can play, destroys these whirlpools Larger-size whirlpools some in fluid media (medium) are destroyed to form a series of lesser whirlpool of sizes by effect, reduce whirlpool with this The intensity of flow noise.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to the one of invention A little modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification Some specific terms, these terms are merely for convenience of description, does not constitute any restrictions to invention.

Claims (10)

1. a kind of oblique flow wind wheel, including wind wheel hub and wind wheel blade, rotation of the wind wheel blade around the wind wheel hub Central axes are distributed in the outer surface of the wind wheel hub, and the wind wheel blade is obliquely installed by hub nose to wheel hub rear end, It is characterized in that, every bit tangent line and the angle of the rotation central axis line of the wind wheel blade on axial vane type line are equal Difference, the thickness of the wind wheel blade in axial direction first increases and then decreases, the blade root along the wind wheel blade to blade tip direction, The blade guide margin of the blade inlet edge entrance of the wind wheel blade includes the camber line that at least two sections of bending directions are opposite.
2. a kind of oblique flow wind wheel according to claim 1, which is characterized in that the blade tip established angle of the wind wheel blade is 20°-40°。
3. a kind of oblique flow wind wheel according to claim 1, which is characterized in that the blade guide margin includes two sections of bending directions Opposite camber line, swivel point of two sections of camber lines between the blade root and the blade tip connect, and two sections of camber lines are in institute It is tangent to state swivel point.
4. a kind of oblique flow wind wheel according to claim 3, which is characterized in that the blade guide margin is on the swivel point top Close to the blade tip camber line radially towards blade tip toward protruding outside the wind wheel blade, the blade guide margin is in swivel point Lower part close to the blade root camber line radially towards blade root toward the wind wheel blade inner recess.
5. a kind of oblique flow wind wheel according to claim 3, which is characterized in that between the swivel point and the blade tip away from From the 30%-50% that H1 is the Leaf Conductance edge lengths H.
6. a kind of low noise diagonal flow fan, including air-ducting ring, oblique flow wind wheel, motor and circular cylindrical shell with air inlet, institute It states air-ducting ring, oblique flow wind wheel, motor to be mounted in the circular cylindrical shell, the rotor-end of the oblique flow wind wheel and the motor Connection, the outer ring side wall of the air inlet of the air-ducting ring are connect with one end of the circular cylindrical shell, and the oblique flow wind wheel is placed in institute It states in the inner ring of air-ducting ring, which is characterized in that the oblique flow wind wheel is the described in any item oblique flow wind wheels of claim 1-5, institute Stating diagonal flow fan further includes postposition impeller inducer, and the postposition impeller inducer includes impeller inducer wheel hub, multi-disc around the water conservancy diversion The uniformly distributed flow-guiding stator blade blade of impeller hub, the impeller inducer wheel hub are connect with the stationary end of the motor, the water conservancy diversion The blade tip of stator blade blade is connected with the inner wall of the circular cylindrical shell.
7. a kind of low noise diagonal flow fan according to claim 6, which is characterized in that the diameter of the air-ducting ring is along axial It is first gradually reduced and then is gradually expanded in the form of continuous flow line, the every bit on the air-ducting ring inner wall difference radial section is along axis To tangent line and the angles of the central axes of the air-ducting ring be all different.
8. a kind of low noise diagonal flow fan according to claim 7, which is characterized in that at the wind-guiding loop diameter minimum with The distance L of the air-ducting ring air inlet is the 3%-15% of the outer diameter D of the air-ducting ring, and diameter D1 is at the air-ducting ring minimum The 65%-90% of the air-ducting ring outer diameter D.
9. a kind of low noise diagonal flow fan according to claim 6, which is characterized in that the number of the flow-guiding stator blade blade With the number of wind wheel blade prime number each other.
10. a kind of low noise diagonal flow fan according to claim 6, which is characterized in that the leaf of the flow-guiding stator blade blade Continuous bulge-structure is set at piece rear.
CN201811611460.2A 2018-12-27 2018-12-27 A kind of oblique flow wind wheel and the low noise diagonal flow fan including the oblique flow wind wheel Pending CN109404334A (en)

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CN110374925A (en) * 2019-08-09 2019-10-25 西安交通大学 A kind of bilayer collector and the flow-mixing blower fan for assembling the double-deck collector
CN110374900A (en) * 2019-08-09 2019-10-25 西安交通大学 A kind of flow-mixing blower fan with sinusoidal pattern meridional channel
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CN110374925A (en) * 2019-08-09 2019-10-25 西安交通大学 A kind of bilayer collector and the flow-mixing blower fan for assembling the double-deck collector
CN110374900A (en) * 2019-08-09 2019-10-25 西安交通大学 A kind of flow-mixing blower fan with sinusoidal pattern meridional channel
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