CN206530538U - Blade, impeller and blower fan for impeller - Google Patents

Abstract

The utility model discloses a kind of blade, impeller and blower fan for impeller, wherein, lower concave part is formed with the blade, the lower concave part is formed by the blade downward bending, the lower concave part is strip, and the blade is separated into two parts, respectively first area and second area by the lower concave part, when wheel rotation, one end of the lower concave part is located at other end of front side on the direction of wheel rotation.By setting lower concave part on blade, enable to that the air-flow of blower fan is more uniform, do not concentrate, effectively reduction vibrations and noise, while the air quantity of blower fan can be increased and the power of blower fan is reduced.

Description

Blade, impeller and blower fan for impeller

Technical field

The utility model is related to blower fan technical field, more particularly to a kind of for the blade of impeller, impeller and is provided with this The blower fan of impeller.

Background technology

Axial flow blower is using widely, available for the ventilation in the places such as general factory, warehouse, office, house, And it is widely used in air conditioner and various ventilating heat dissipating environments.Axial flow blower is main by parts such as impeller, casing, motor Composition, wherein impeller is typically made up of blade and wheel hub, when the impeller is rotated, gas from air inlet axially into impeller, by The pushing of impeller blade and raise the energy of gas.Influence of the shape of blade to air-flow performance is very big.Existing blade There are many worth improvements such as appearance structure is outmoded, wind-out range is small, efficiency is not high, noise experience is undesirable.

Utility model content

In view of this, sweep the leaf for impeller that wind is uniform, wind sweeping area is wide, Energy Efficiency Ratio is high this application provides a kind of Piece, impeller and the blower fan for being provided with this impeller.

According to first aspect of the present utility model there is provided a kind of blade for impeller, under being formed with the blade Recess, the lower concave part is formed by the blade downward bending, and the lower concave part is strip, and the lower concave part is by the blade Two parts, respectively first area and second area are separated into, when wheel rotation, one end of the lower concave part is in wheel rotation Direction on be located at other end of front side.

Preferably, the first area and/or second area are formed as smooth surface.

The second area is formed as elongated area.

Preferably, the blade includes radially inner edge, radially outer edge, leading edge and trailing edge, wherein, the radially outer edge and institute State radially inner edge relative, be free end；When wheel rotation, the leading edge is on the direction of wheel rotation positioned at the trailing edge Front side.Preferably, the lower concave part extends from the leading edge to trailing edge.

Preferably, the lower concave part is located at the position intersected close to the leading edge and radially outer edge with the intersection point of the leading edge Put；And/or, the intersection point of the lower concave part and trailing edge is located at the middle part of the trailing edge.

Preferably, it is formed with downward bent part in the region intersected close to the radially outer edge and trailing edge.

Preferably, the region intersected close to the radially outer edge and trailing edge is removed.

Preferably, it is formed with inner fovea part on the trailing edge of the blade.

According to second aspect of the present utility model there is provided a kind of impeller, blade described herein is provided with.

According to the third aspect of the present utility model there is provided a kind of impeller, the impeller includes blade part, the blade part bag Twi-tier blade is included, the twi-tier blade includes internal layer blade and outer blade, and the outer blade is set to described herein Blade.

Preferably, the internal layer blade and outer blade are diametrically alternately set.

Preferably, vane, the external diameter and blade part of the vane are provided between the internal layer blade and outer blade External diameter ratio between 0.575 to 0.625, and/or, the thickness of the vane is 1.0 to 2.5mm.

According to fourth aspect of the present utility model there is provided a kind of blower fan, impeller described herein is provided with.

In the axial-flow fan blade that the application is provided, lower concave part is formed with blade, so that blade is separated into two Region, enables to that air-flow is more uniform, do not concentrate, effectively reduction vibrations and noise, while can increase the air quantity of blower fan simultaneously Reduce the power of blower fan；And the blade tip of blade is leaf using imitative " petrel " wing, elongated mellow and full, ensureing the same of air quantity When, power can be further reduced, air quantity is improved, greatly improves efficiency, and the Energy Efficiency Ratio of fan can be improved；It can increase simultaneously Plus blowing range.

Brief description of the drawings

By description referring to the drawings to the utility model embodiment, of the present utility model above-mentioned and other mesh , feature and advantage will be apparent from, in the accompanying drawings：

Fig. 1 is the blade overall structure diagram in the application；

Fig. 2 is the blade view in the application；

Fig. 3 is the blade construction schematic diagram in the application；

Fig. 4 is the impeller overall structure diagram in the application.

Embodiment

The utility model is described below based on embodiment, but the utility model is not restricted to these implementations Example.

Blade in the application is arranged on wheel hub, is formed impeller, be can operate with axial flow blower, for example, apply to axle stream On fan, for providing soft uniform air-flow, noise can be reduced, air quantity is improved, and reduce power of fan.As Fig. 1-3 institute Show, the blade 22 in the application is formed as laminated structure, be formed on (the explanation, due to impeller, blade-shaped of lower concave part 225 Shape is complicated, and the orientation shown in reference picture up and down 1 in the application, is upper positioned at the side of blade suction surface, positioned at blade pressure Under the side in power face is), the lower concave part 225 is formed by the blade downward bending, it is preferable that shown lower concave part 225 is length The blade is separated into two parts by strip, the lower concave part 225, is first area 226 and second area 227 respectively, described Lower concave part 225 is configured to when wheel rotation, and one end of the lower concave part 225 is located at other end on the direction of wheel rotation Front side.So, in wheel rotation, flowing of the lower concave part 225 without interference with air-flow.

In a preferred embodiment, one end of the lower concave part 225 is arranged on blade inlet edge, the first area The scope of 226 blade inlet edges included is more than the scope for the blade inlet edge that the second area 227 includes, the second area The scope of 227 blade trailing edges included is more than or equal to the scope for the trailing edge that the first area 226 includes.Firstth area Domain 226 is tilted, the second area 227 gradually downward from the front end (close to the position of leading edge) of blade to the lower concave part 225 Tail end (close to the position of radial outside and trailing edge) from from the lower concave part 225 to blade is gradually tilted, and forms similar " big thin,tough silk spot The structure of butterfly " wing.So, imitated at the middle part of blade " big thin,tough silk Ursula butterfly " it is recessed along blade, and warp and repair by certain inclination angle Positive blade profile, the wind at middle part can be spread apart, wind sense is not concentrated, softer, Consumer's Experience is more comfortable.

As shown in figure 1, in a preferred embodiment, the blade 22 includes radially inner edge 221, radially outer edge 222, institute Leading edge 223 and the trailing edge 224 are stated, wherein, the radially inner edge 221 is arranged on wheel hub, in the structure with twi-tier blade In, the radially inner edge 223 is arranged on the outer wall of vane 23 and (is discussed in detail below), so that the blade 22 be fixed. The radially outer edge 222 is relative with the radially inner edge 221, is free end.The leading edge 223 is arranged on blade 22 windward End, trailing edge 224 is arranged on the leeward end of blade 22, and when blade part 2 is rotated, the leading edge 223 is on the direction of wheel rotation Positioned at the front side of the trailing edge 224.Preferably, the lower concave part 225 is formed as strip, prolongs from the leading edge 223 to trailing edge 224 Stretch.It is further preferred that the lower concave part 225 and the intersection point of the leading edge 223 are located at close to the leading edge 223 and radially outer edge 222 intersecting positions, the intersection point of the lower concave part 225 and trailing edge 224 is located at close to the position at the midpoint of trailing edge 224.

In a preferred embodiment, as shown in Figure 1-2, the first area 226 is from the leading edge 223 to described recessed Inclined inclination slope is not equal gradually downward in portion 225, that is to say, that what the first area 226 was formed is not to tilt Plane, but the smooth surface of the curved surface of slope variation, preferably slope variation.So can be advantageously in the expansion of air-flow Dissipate, form softer wind sense.Equally, the second area 227 is from the lower concave part 225 to the He of radially outer edge 222 The slope that the infall of trailing edge 224 is gradually tilted is also not wait, and the second area 227 is preferably alsoed form as smooth surface. This structure, can be conducive to the further diffusion of air-flow so that air-flow more homogeneous soft.

As described above, the middle part of blade 22 imitative " big thin,tough silk Ursula butterfly " forms the lower concave part 225 along blade is recessed, it is preferable that institute It is 10-30 ° to state the recessed angle of lower concave part, and the recessed depth of the lower concave part 225 is blade maximum chord length (blade radial outer rim The chord length at place) 5%-10%, then warp by certain inclination angle and (form second area 227) amendment blade profile, described to warp Angle can be identical with recessed angle, can also be different, and two angles are preferably relatively when different.This structure can be by The wind of middle part of blade is spread apart, and is unlikely to the air-flow concentrations of fan blowout, so as to improve air quantity, reduces noise.

As shown in figure 3, in a preferred embodiment, the second area 227 is formed as elongated area, the elongated area The shape of " petrel " wing is configured like, it is elongated mellow and full, can be in the case of same efficiency while air quantity is ensured Reduce power, energy-conserving and environment-protective.Specifically, can be concave arc as shown in figure 3, the leading edge 223 is formed as smooth shaped form Shape, or, become larger from radially inner edge 221 to radius of curvature on the direction of radially outer edge 222, and radially outer edge 222 is basic Formed on the face of cylinder coaxial with the wheel nave collar 12 of wheel hub, so, the region that can be crossed in radially outer edge 222 and leading edge 223 More rounded sharp structure is formed, the second area 227 can include the sharp structure, or including the sharp structure A part so that the second area 227 is formed similarly to the elongated area of the wing shape of " petrel ", can effectively improve this The air quantity in region.So, first area 226 is formed as secondary wind face, and the formation of second area 227 is main wind face.That is, recessed Done work based on blade beyond portion 225 region, the region within lower concave part 225 is secondary acting region, the blade profile in main acting domain area It is imitative " petrel " wing, elongated and mellow and full blade profile, with higher lift-drag ratio, it is possible to increase the mechanical efficiency of blade, same Air quantity is improved in the case of power.So, a blade is divided to two kinds of blade profile actings, and Liang Ge areas can be passed through during a blade rotation Domain：First area 226 and second area 227 blow out two strands of wind, while being provided with multiple such blades, can increase wind Continuity and uniformity, can effectively reduce vibrations and noise.

As shown in Figure 1, Figure 3, in a preferred embodiment, in the afterbody of blade 22, for example, outside close to the footpath The region that edge 222 and trailing edge 224 intersect, is formed with downward bent part 228.Preferably, the area of the downward bent part 228 is blade area 10%-30%.The downward bent part 228 is preferably relative to the reclinate angle of the plane of the axis perpendicular of blower fan 5°-20°.The downward bent part 228 is located at the afterbody of blade 22, i.e., positioned at the region intersected close to the radially outer edge and trailing edge. The downward bent part 228 is preferably formed into triangle, and a line of the triangle is located on the radially outer edge 222, this side The length of side is the 5%-30% of the length of radially outer edge 222；Other a line is located on trailing edge 224, and the length of side on this side is also trailing edge The 5%-30% of 224 length.In a further embodiment, the downward bent part 228 is directly removed.Curved or removal should under Behind part, the interference of blade trailing edge and adjacent blades leading edge fluid can be effectively reduced, flow-disturbing is caused, " hissing " is formed pneumatic different Sound, can increase the air quantity and efficiency of blade with curved at present, improve Energy Efficiency Ratio.

As shown in figure 3, in a further embodiment, inner fovea part 229 is formed with the afterbody of the blade 22, it is preferable that The inner fovea part 229 is formed on the trailing edge 224, can be formed by removing partial blade material.The inner fovea part 229 is preferred Formed within the 85% of the length of trailing edge 224, that is to say, that the inner fovea part 229 is big apart from the distance radially held of trailing edge In equal to the 15% of the length of trailing edge 224, so, in less than 85% indent of length of blade, it can meet and not lose air quantity, and can drop The weight of low blades, reaches the purpose for declining low-power in same efficiency.Blade profile trailing edge local inner concave subtracts material, reduces power, Improve the utilization rate of blade and trailing edge vortex can be improved, improve air quantity.Equally, in can also being formed on radially outer edge 222 Recess 220, the inner fovea part 220 is preferably formed on the edge of downward bent part 228, and further reduction material, reduction work(can be achieved Rate.

The blower fan for the blade 22 being provided with the application and the blower fan of the prior art for being provided with seven common blades Performance comparison data are as shown in the table：

As can be seen from the above table in the case of rotating speed identical, the fan delivery for the blade being provided with the application, which is more than, to be set Now vaned blower fan is equipped with, and moment of torsion and power all decrease, efficiency increase.

As shown in figure 4, the impeller in the application includes hub portion 1 and blade part 2, the blade part 2 is connected to the wheel In hub portion 1, the hub portion 1 can be in power set, and such as motor is rotated by, so as to drive the blade part 2 to revolve Anger of changing the line of production stream.Wherein, the hub portion 1 includes drive device auxiliary section 11 and outside positioned at the footpath of drive device auxiliary section 11 The wheel nave collar 12 of side, is provided with mating holes on the drive device auxiliary section 11, is used for and drive device, the drive of such as motor Moving axis is coordinated, so that the power of drive device is delivered in hub portion 1.In the drive device auxiliary section 11 and wheel hub Attachment structure 13 is provided between ring 12, for wheel nave collar 12 and drive device auxiliary section 11 to be connected.

In a preferred embodiment, the blade part 2 in the application is twi-tier blade, including internal layer blade 21 and outer layer leaf Piece, wherein, outer blade is set to the structure of the blade 22 in the application, is set between the internal layer blade 21 and blade 22 There is vane 23.Wherein, the vane 23 is coaxially disposed with hub portion 1, and specially vane 23 and the wheel nave collar 12 of hub portion 1 is coaxial Set, the vane 23 is arranged on the radial outside of wheel nave collar 12, internal layer blade with the wheel nave collar 12 spaced apartly 21 are arranged between hub portion 1 and vane 23, are specially arranged between the wheel nave collar 12 of hub portion 1 and vane 23, internal layer leaf The radially inner edge of piece 21 is arranged on the outer wall of wheel nave collar 12, and its radially outer edge is arranged on the inwall of vane 23；The blade 22 are arranged on the outer wall of vane 23, specifically, the radially inner edge 221 of the blade 22 is arranged on the outer wall of the vane 23 On.Preferably, the internal layer blade 21 and blade 22 are diametrically alternately set, and can so form more uniform gas Stream so that the air-flow that impeller is produced is softer.

Preferably, the external diameter of the vane 23 and blade part 2 compares preferably between 0.575 to 0.625, vane 23 Thickness is 1.0 to 2.5mm.The vane 23 is the connection bridge of internal layer blade 21 and (outer layer) blade 22, to the whole of blade part 2 External sight and performance can be played an important role, and vane 23 is too small or excessive, all inside and outside blade can be caused out of proportion, shadow Sound is attractive in appearance, if the diameter of vane 23 is excessive, thickness is excessive, vane 23 can be caused to occupy the mass ratio increase of blade part 2, not only The oeverall quality of blade part 2 can be increased, blade part power is also resulted in and increase, the overall efficiency of reduction blade part, and vane 23 Thickness it is too small, the intensity using its blower fan can be influenceed, the fracture of vane 23 is easily caused.

In the axial-flow fan blade that the application is provided, lower concave part is formed with blade, so that blade is separated into two Region, enables to that air-flow is more uniform, do not concentrate, effectively reduction vibrations and noise, solves fan wind speed undue concentration and causes User it is dizzy, make wind softer, wind sense is more preferable；And the blade tip of blade is leaf using imitative " petrel " wing, elongated mellow and full, While ensureing air quantity, power is reduced, air quantity is improved, greatly improves efficiency, and the Energy Efficiency Ratio of fan can be improved；Simultaneously can Increase the blowing scope of wind.

It should be noted that in present specification, the relational terms of such as " first ", " second " etc be used merely to by Some entity or operation are distinguished with another entity or operation, and are not necessarily required or implied these entities or deposited between operating In any this actual relation or order.In addition, term " comprising ", "comprising" or its any other variant are intended to Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those Element, but also other key elements for being not expressly set out can be included, or can also include being this process, method, article Or the intrinsic key element of equipment.Unless otherwise defined, technology used herein and scientific terminology with it is of the present utility model The implication that those skilled in the art are generally understood that is identical.Term used herein is intended merely to describe specifically to implement mesh , it is not intended that limitation the utility model.Terms such as herein presented " parts " can both represent single part, The combination of multiple parts can be represented.Terms such as herein presented " installations ", " setting " can both represent a part Another part is attached directly to, can also represent that a part is attached to another part by middleware.Herein one Feature described in individual embodiment can be applied to another embodiment in combination individually or with further feature, unless should Feature is not applied to or is otherwise noted in another embodiment.

Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this area For technical staff, the utility model can have various changes and change.All institutes within spirit of the present utility model and principle Any modification, equivalent substitution and improvements of work etc., should be included within protection domain of the present utility model.

Claims (14)

1. a kind of blade for impeller, it is characterised in that lower concave part is formed with the blade, the lower concave part is by described Blade downward bending is formed, and the lower concave part is strip, and the blade is separated into two parts by the lower concave part, and respectively the One region and second area, when wheel rotation, one end of the lower concave part is located at other end on the direction of wheel rotation Front side.

2. blade according to claim 1, it is characterised in that the first area and/or second area are formed as smooth Curved surface.

3. blade according to claim 1 or 2, it is characterised in that the second area is formed as elongated area.

4. blade according to claim 1 or 2, it is characterised in that the blade includes radially inner edge, radially outer edge, preceding Edge and trailing edge, wherein, the radially outer edge is relative with the radially inner edge, is free end；When wheel rotation, the leading edge exists It is located at the front side of the trailing edge on the direction of wheel rotation.

5. blade according to claim 4, it is characterised in that the lower concave part is from the leading edge or radially outer edge to tail Edge extends.

6. blade according to claim 5, it is characterised in that the lower concave part and the intersection point of the leading edge are located at close to institute State leading edge and the intersecting position of radially outer edge；And/or, the intersection point of the lower concave part and trailing edge is located at the middle part of the trailing edge.

7. blade according to claim 4, it is characterised in that in the region shape intersected close to the radially outer edge and trailing edge Into there is downward bent part.

8. blade according to claim 4, it is characterised in that the region intersected close to the radially outer edge and trailing edge is gone Remove.

9. blade according to claim 4, it is characterised in that on the trailing edge and/or radially outer edge of the blade It is formed with inner fovea part.

10. a kind of impeller, it is characterised in that be provided with the blade described in claim any one of 1-9.

11. a kind of impeller, it is characterised in that the impeller includes blade part, the blade part includes twi-tier blade, the bilayer Blade includes internal layer blade and outer blade, and the outer blade is set to the blade described in claim any one of 1-9.

12. impeller according to claim 11, it is characterised in that the internal layer blade and outer blade diametrically interlock Ground is set.

13. the impeller according to claim 11 or 12, it is characterised in that set between the internal layer blade and outer blade Be equipped with vane, the external diameter of the vane and the external diameter ratio of blade part between 0.575 to 0.625, and/or, the vane Thickness is 1.0 to 2.5mm.

14. a kind of blower fan, it is characterised in that be provided with the impeller described in claim any one of 10-13.