CN214742354U - Effect-improving flow collector of axial flow fan - Google Patents
Effect-improving flow collector of axial flow fan Download PDFInfo
- Publication number
- CN214742354U CN214742354U CN202120017030.9U CN202120017030U CN214742354U CN 214742354 U CN214742354 U CN 214742354U CN 202120017030 U CN202120017030 U CN 202120017030U CN 214742354 U CN214742354 U CN 214742354U
- Authority
- CN
- China
- Prior art keywords
- effect
- collector
- ring
- lifting ring
- center
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides an it imitates axial fan collector belongs to the axial fan field, including the collector main part, the collector main part is installed in the stator periphery, and the stator is fixed on the guide vane wheel hub, is equipped with the diffusion section in the collector main part, and the diffusion section is extended to the end of giving vent to anger by the inlet end of collector main part, and diffusion section inboard is equipped with and carries and imitates the device. The effect lifting device comprises a plurality of circular effect lifting rings, a plurality of effect lifting ring rings are sequentially arranged along the air inlet direction of the current collector, the circle center of each effect lifting ring is located on the central axis of the impeller hub, each effect lifting ring is composed of a plurality of salient points, and the height of each salient point on each effect lifting ring is gradually reduced along the air inlet direction of the current collector. The collector can reduce the idle work of airflow, reduce the eddy loss and effectively improve the overall efficiency of the fan.
Description
Technical Field
The utility model relates to an axial fan field, more specifically relates to an it imitates axial fan collector to carry.
Background
The axial flow fan has wide application, can be used for ventilation in places such as general factories, warehouses, offices, houses and the like, can also be used for air coolers (air coolers), evaporators, condensers and the like, and also can be used for mining axial flow fans. The front end of the impeller of the axial flow fan is provided with a current collector, and gas is guided to the impeller through the current collector, and works on the gas under the rotation action of the impeller, so that the pressure is increased. The current collector is used for smoothly guiding gas to the impeller, so that the uniformity of gas flow at the inlet of the impeller is ensured, and the aim of improving the efficiency of the impeller is fulfilled. Currently, due to the process manufacturing requirements, a certain gap is kept between the blade tips of the impeller and the current collector to facilitate the air flow and prevent the radial runout of the impeller during operation from interfering with the current collector. Because radial clearance exists, blade top air current will be by the pressure surface flow direction suction surface, can produce most advanced vortex thereupon, can take away along with the mainstream after most advanced vortex forms, influences the homogeneity of air current, and the existence of most advanced vortex can reduce axial fan's pressure and efficiency. The utility model discloses a fan collector, centrifugal fan and air conditioning system (CN201920256544.22019.10.29) although disclose a windward side and be equipped with the collector of arch and/or recess, this patent does not do detailed description to annular bellied concrete arrangement and structure, and the technical scheme of the protection of applying for also fails to solve the influence of most advanced vortex to fan operating efficiency betterly.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a carry and imitate axial fan collector, this collector can reduce the idle work of air current, reduce eddy current loss, effectively improve the whole efficiency of fan.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a current collector of an effect-improving axial flow fan comprises a current collector main body, wherein the current collector main body is arranged on the periphery of a guide vane, the guide vane is fixed on a guide vane wheel hub, a diffusion section is arranged on the current collector main body, the diffusion section extends from the air inlet end to the air outlet end of the current collector main body, the diameter of the diffusion section is gradually increased from the air inlet end to the air outlet end of the current collector main body, and an effect-improving device is arranged on the inner side of the diffusion section;
the effect lifting device comprises a plurality of circular effect lifting rings, the effect lifting rings are sequentially provided with N rings along the air inlet direction of the current collector, the circle center of each effect lifting ring is located on the central axis of the impeller hub, and each effect lifting ring is composed of a plurality of salient points.
In the preferred embodiment of the present invention, the i-th ring of the air inlet direction of the collector is the lifting ring and the height of the bump is hiThe width of the bottom surface is diThe height of the salient points on each effect lifting ring is gradually reduced along the air inlet direction of the current collector, namely hi＞hi+1(ii) a The diameter of the ith ring is Di，hi＝Di*[(1+i)/i]/100,DiHeight d of bumpiThere are the following relationships between: d is not less than 0.5mmi≤0.02DiAnd d isi＝di+1(ii) a N-1, N being a non-zero natural number, N-int (e/d)i) If N is 0, then N is 1; h isiAnd the vertical distance between m and n is defined as the straight line passing through the center of the salient point and tangent to the molded line of the inner wall surface of the current collector, and n is the straight line parallel to m and tangent to the top of the salient point.
The utility model discloses in the technical scheme of preferred, carry and imitate the ring edge the number of turns N that the direction of admitting air of collector set gradually is greater than or equal to 1, and when N is 3, follows 3 rings of the direction of admitting air of collector carry and imitate in the ring the width of bump is d respectively1、d2、d3(ii) a The distance between the outlet of the diffusion section and the center of the salient point of the first ring of the effect lifting ring is k1The distance between the center of the salient point of the effect lifting ring in the first circle and the center of the salient point of the effect lifting ring in the second circle is k2The distance between the center of the salient point of the second ring of the effect-lifting ring and the center of the salient point of the third ring of the effect-lifting ring is k3，k1＞d1，k2＞d1+d2，k3＞d2+d3。
In the preferred technical scheme of the utility model, the i-1 th circle is lifted to imitate the ring the bump center is lifted to imitate the ring bump center distance with the i-th circle and is ki，ki＞di-1+di。
In the preferred embodiment of the present invention, the maximum distance between the diffuser and the axis of the impeller hub is e, k1+k2+k3＜e。
In the preferred technical scheme of the utility model, the i-th ring is adjacent two in the lifting ring the convex point is located with the included angle of the circle center connecting line of the lifting ring is betaiThe arc length f between the centers of two adjacent salient points of the ith ringiI is more than or equal to 1 and less than or equal to N; wherein beta is1＜β2＜……βi，β1、β2、β3……βiAre all integral multiples of 3 DEG, and betai≥360*fi/(π*Di)。
The utility model discloses in the technical scheme of preferred, in the axial view, adjacent two carry and imitate on the ring the bump crisscross setting each other.
In the technical scheme of the preferred embodiment of the present invention, each of the lifting rings has the same shape and size of the protruding points.
In the preferred embodiment of the present invention, the convex points are perpendicular to the cross section of the impeller hub in the axial direction is rectangular, polygonal, semicircular, oval or airfoil.
The utility model has the advantages that:
the utility model provides a carry and imitate axial fan collector, the diffusion section of this collector is provided with and carries the effect device that imitates by a plurality of and form, and the height of the bump on each carries and imitates the ring is decreased gradually along the direction of admitting air of collector in proper order, carries and imitates the device on the one hand and can break up the most advanced vortex between stator top and collector to reduce the eddy current loss, improve the whole efficiency of fan; on the other hand, the rotating speed of the main flow end wall of the guide vane passing through the impeller can be reduced and converted into the axial speed as much as possible, so that the useless work is reduced, the useful work is increased, and the purpose of improving the effect is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Wherein:
fig. 1 is a schematic structural view of a current collector of an enhanced axial flow fan provided by the present invention;
fig. 2 is a left side view of a current collector of an enhanced axial flow fan provided by the present invention;
FIG. 3 is a sectional view A of FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 3 at P;
FIG. 5 is a schematic cross-sectional view of a rounded bump;
FIG. 6 is a schematic cross-sectional view of a rectangular bump;
FIG. 7 is a schematic cross-sectional view of an elliptical bump;
FIG. 8 is a schematic cross-sectional view of a wing bump;
FIG. 9 is a schematic diagram of arc length fi between centers of two circumferentially adjacent salient points in the ith ring.
Reference numerals:
the device comprises a collector body, a guide vane wheel hub, a guide vane, an effect-improving device, a diffuser, a ring and salient points, wherein the collector body is 1, the guide vane wheel hub is 2, the guide vane is 3, the effect-improving device is 4, the diffuser is 11, the effect-improving ring is 41, and the salient points are 411.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly. In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
As shown in fig. 1 to 9, an effect-enhancing axial flow fan collector includes a collector main body 1, the collector main body 1 is installed at the periphery of a guide vane 3, the guide vane 3 is fixed on a guide vane wheel hub 2, a diffuser section 11 is arranged on the collector main body 1, the diffuser section 11 extends from the air inlet end to the air outlet end of the collector main body 1, the diameter of the diffuser section 11 gradually increases from the air inlet end to the air outlet end of the collector main body 1, and an effect-enhancing device 4 is arranged inside the diffuser section 11; the material of the device 4 corresponds to the material of the body 1 of the collector and can be plastic or metal or a mixture of plastic and metal. The effect-lifting device 4 comprises a plurality of circular effect-lifting rings 41, the plurality of effect-lifting rings 41 are sequentially arranged in the air inlet direction of the current collector main body 1 in N circles, the circle center of each effect-lifting ring 41 is located on the central axis of the impeller hub, and each effect-lifting ring 41 is composed of a plurality of salient points 411.
The number of turns of the plurality of effect-lifting rings 41 sequentially arranged along the air inlet direction of the current collector is N, N is more than or equal to 1, and furthermore, the height of the salient points of the effect-lifting ring of the ith turn is h along the air inlet direction of the current collectoriThe width of the bottom surface is diThe height of the salient points on each effect lifting ring is gradually reduced along the air inlet direction of the current collector, namely hi＞hi+1(ii) a The diameter of the ith ring is Di，hi＝Di*[(1+i)/i]/100,DiHeight d of bumpiThere are the following relationships between: d is not less than 0.5mmi≤0.02DiAnd d isi＝di+1(ii) a N-1, N being a non-zero natural number, N-int (e/d)i) If N is 0, then N is 1; h isiAnd the vertical distance between m and n is defined as the straight line passing through the center of the salient point and tangent to the molded line of the inner wall surface of the current collector, and n is the straight line parallel to m and tangent to the top of the salient point. More specifically, the height of the protruding point 411 is the distance between the tangent line between the bottom of the protruding point 411 and the surface of the diffuser 11 and the tangent line between the top of the protruding point 411, and the effect-promoting device 4 may be integrally formed with the collector body 1.
In the above mentioned current collector of axial flow fan with improved efficiency, the diffuser section 11 of the current collector is provided with the effect-improving device 4 formed by a plurality of circular effect-improving rings 41, the height of the salient points 411 on each effect-improving ring 41 decreases gradually along the air intake direction of the current collector, on one hand, the effect-improving device 4 can break up the tip vortex between the top end of the guide vane 3 and the current collector, thereby reducing the vortex loss and improving the overall efficiency of the fan; on the other hand, the rotating speed of the main flow end wall passing through the guide vane 3 can be reduced and converted into the axial speed as much as possible, so that the useless work is reduced, the useful work is increased, and the purpose of improving the effect is achieved.
More specifically, the collector is mounted at the inlet end of an impeller which is activated to draw gas in. The function of the current collector is to enable the air flow to enter the impeller in a flat mixing mode, and due to the limitation of the current process, a certain gap exists between the blade top end of the impeller and the current collector, so that the current collector and the impeller can run smoothly. The collector body 1 is installed on the periphery of the guide vane 3, and due to the existence of a radial gap, airflow at the top end of the guide vane 3 flows from a pressure surface to a suction surface, and then tip vortex is generated. The tip vortex can be taken away by the mainstream after forming, influences the homogeneity of air current, and the existence of tip vortex can reduce axial fan's pressure and efficiency. Increased it is in to carry and imitate device 4 back, carry and imitate device 4 and be in collector main part 1 diffusion section 11 forms the disturbance to the air current, can improve most advanced vortex at to a great extent, breaks up most advanced vortex, makes big vortex reduce the vortex, is favorable to the homogeneity of air current to flow, and then can improve fan efficiency. While passing throughDue to the effect of the guide vanes, part of air flow can rotate around the axial direction of the guide vanes, and the rotating air flow cannot generate positive effect on the axial flow fan and becomes useless, so that the efficiency of the axial flow fan is reduced. The effect-improving device 4 can reduce the winding speed, thereby increasing the axial speed, further increasing useful work and being beneficial to improving the efficiency of the fan. The number of turns of the multiple effect-lifting rings 41 arranged in sequence along the air inlet direction of the current collector is N, and N is larger than or equal to 1. The circle center of each effect-lifting ring 41 is located on the central axis of the impeller hub 2, and each effect-lifting ring 41 is composed of a plurality of salient points 411; each of the bumps 411 has a height hiThe height of the salient points 411 on each effect-lifting ring 41 decreases gradually along the air inlet direction of the current collector, namely hi＞hi+1Therefore, the effect of the effect-lifting ring 41 close to the air inlet end of the collector on disturbance of the air flow is larger than that of the effect-lifting ring 41 far away from the air inlet end of the collector, tip vortex is gradually improved by a plurality of effect-lifting rings 41, and the effect of improving the tip vortex is more obvious by arranging more effect-lifting rings 41, so that the effect is more obvious. In the actual production, in order to balance the relationship between the production cost and the fan benefit, the number N of the effect-lifting rings 41 is preferably 3-6.
Further, when N is 3, the widths of the salient points 411 on 3 turns of the effect lifting ring 41 along the air inlet direction of the collector are d respectively1、d2、d3(ii) a The distance between the outermost side of the diffuser section 11 and the center of the salient point 411 of the effect lifting ring 41 of the first ring is k1The center distance between the salient point 411 of the effect lifting ring 41 in the first circle and the salient point 411 of the effect lifting ring 41 in the second circle is k2The center distance between the salient point 411 of the second ring of the effect-lifting ring 41 and the salient point 411 of the third ring of the effect-lifting ring 41 is k3，k1＞d1，k2＞d1+d2，k3＞d2+d3(ii) a The distance between the center of the convex point of the ith-1 circle of effect-lifting ring and the center of the convex point of the ith circle of effect-lifting ring is ki，ki＞di-1+di. Further, the diffuser section 11 is along the impeller hubThe maximum distance in the 2-axis direction is e, k1+k2+k3< e. Furthermore, as shown in fig. 3, an included angle between two adjacent salient points 411 in the ith ring 41 and a line connecting centers of the two salient points 411 in the ith ring 41 is βiThe arc length f between the centers of two adjacent salient points of the ith ringiI is more than or equal to 1 and less than or equal to N; wherein beta is1＜β2＜……βi，β1、β2、β3……βiAre all integral multiples of 3 DEG, and betai≥360*fi/(π*Di). The salient points 411 on two adjacent effect lifting rings 41 are arranged in a staggered manner. To further improve the air intake efficiency, k1＞d1，k2＞d1+d2，k3＞d2+d3(ii) a The distance between the center of the convex point of the ith-1 circle of effect-lifting ring and the center of the convex point of the ith circle of effect-lifting ring is ki，ki＞di-1+diI.e. the distance between the salient points 411 in the axial direction of the impeller is greater than the height of the salient points 411, so that the salient points can better disturb the flow in the outlet area, and the strength of the vortex in the diffuser section 11 is reduced, which is more beneficial to improving the efficiency. And two adjacent carry and imitate ring 41 last salient point 411 staggered arrangement makes the salient point play the disturbance effect to the mainstream better, plays the effect that prevents here backward flow to a certain extent, improves the air inlet efficiency of whole fan.
Further, the shape and size of the salient points 411 of each of the effect-lifting rings 41 are consistent. Further, the shape of the cross section of the salient point 411 perpendicular to the axial direction of the impeller hub 2 is rectangular, polygonal, semicircular, oval or airfoil. The bumps 411 with the same shape and size have the same height and bottom area, which is beneficial to reducing the production cost and facilitating the market popularization of the current collector.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. The utility model provides an improve and imitate axial fan collector, includes the collector main part, the collector main part is installed peripherally at the stator, the stator is fixed on the guide vane wheel hub, be equipped with the diffuser section in the collector main part, the diffuser section by the inlet end of collector main part is extended to the end of giving vent to anger, the diameter of diffuser section by the inlet end of collector main part is to giving vent to anger the end and is crescent its characterized in that: the inner side of the diffusion section is provided with a lifting device;
the effect lifting device comprises a plurality of circular effect lifting rings, the effect lifting rings are sequentially provided with N rings along the air inlet direction of the current collector, the circle center of each effect lifting ring is located on the central axis of the impeller hub, and each effect lifting ring is composed of a plurality of salient points.
2. The enhanced axial flow fan collector of claim 1, wherein:
along the air inlet direction of the current collector, the height of the salient points of the lifting ring of the ith ring is hiThe width of the bottom surface is diThe height of the salient points on each effect lifting ring is gradually reduced along the air inlet direction of the current collector, namely hi＞hi+1(ii) a The diameter of the ith ring is Di，hi＝Di*[(1+i)/i]/100,DiHeight d of bumpiThere are the following relationships between: d is not less than 0.5mmi≤0.02DiAnd d isi＝di+1(ii) a N-1, N being a non-zero natural number, N-int (e/d)i) If N is 0, then N is 1, and N is 1 is substituted into formula N int (e/di) to obtain the calculation result of di as the calculation result of di when N is 0; h isiAnd the vertical distance between m and n is defined as the straight line passing through the center of the salient point and tangent to the molded line of the inner wall surface of the current collector, and n is the straight line parallel to m and tangent to the top of the salient point.
3. The enhanced axial flow fan collector of claim 1, wherein:
the number of turns N of the effect lifting ring sequentially arranged along the air inlet direction of the current collector is more than or equal to 1, and when N is 3, the width of the salient points on the effect lifting ring is d respectively along 3 turns of the air inlet direction of the current collector1、d2、d3(ii) a The distance between the outlet of the diffusion section and the center of the salient point of the first ring of the effect lifting ring is k1The distance between the center of the salient point of the effect lifting ring in the first circle and the center of the salient point of the effect lifting ring in the second circle is k2The distance between the center of the salient point of the second ring of the effect-lifting ring and the center of the salient point of the third ring of the effect-lifting ring is k3，k1＞d1，k2＞d1+d2，k3＞d2+d3。
4. The enhanced axial flow fan collector of claim 3, wherein:
the distance between the center of the convex point of the ith-1 circle of effect-lifting ring and the center of the convex point of the ith circle of effect-lifting ring is ki，ki＞di-1+di。
5. The enhanced axial flow fan collector of claim 1, wherein:
the maximum distance of the diffusion section along the axial line direction of the guide impeller hub is e, k1+k2+k3＜e。
6. The enhanced axial flow fan collector of claim 2, wherein:
the included angle between two adjacent salient points in the ith ring and the circle center connecting line of the lifting ring is betaiThe arc length f between the centers of two adjacent salient points of the ith ringiI is more than or equal to 1 and less than or equal to N; wherein beta is1＜β2＜……βi，β1、β2、β3……βiAre all integral multiples of 3 DEG, and betai≥360*fi/(π*Di)。
7. The enhanced axial flow fan collector of claim 1, wherein:
the salient points on two adjacent effect lifting rings are arranged in a staggered mode.
8. The effect-enhanced axial flow fan collector according to any one of claims 1 to 7, wherein:
the salient points of each effect lifting ring are consistent in shape and size.
9. The effect-enhanced axial flow fan collector according to any one of claims 1 to 7, wherein:
the cross section of the salient point in the direction vertical to the axial line of the guide vane wheel hub is rectangular, polygonal, semicircular, oval or airfoil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120017030.9U CN214742354U (en) | 2021-01-05 | 2021-01-05 | Effect-improving flow collector of axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120017030.9U CN214742354U (en) | 2021-01-05 | 2021-01-05 | Effect-improving flow collector of axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214742354U true CN214742354U (en) | 2021-11-16 |
Family
ID=78637937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120017030.9U Active CN214742354U (en) | 2021-01-05 | 2021-01-05 | Effect-improving flow collector of axial flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214742354U (en) |
-
2021
- 2021-01-05 CN CN202120017030.9U patent/CN214742354U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11506211B2 (en) | Counter-rotating fan | |
| CN106468286A (en) | Blower fan and its bubbler | |
| CN103899576B (en) | fan and air conditioner outdoor machine | |
| CN101265923B (en) | Fan and its fan frame | |
| CN1185547A (en) | Impeller for centrifugal fan | |
| CN113738694A (en) | High-performance centrifugal impeller with round-head-shaped front edge blade profile for respirator | |
| CN214742354U (en) | Effect-improving flow collector of axial flow fan | |
| CN205639069U (en) | Movable vane, guiding subassembly and axial compressor cabinet -type air conditioner of axial compressor cabinet -type air conditioner | |
| CN108005956A (en) | A kind of volute structure used for automobile air conditioning | |
| CN106016511A (en) | Air outlet hood and air-conditioning outdoor unit equipped with same | |
| CN216447178U (en) | Backward centrifugal fan | |
| CN113446237B (en) | Centrifugal ventilator with semi-open type ternary impeller | |
| CN213953930U (en) | Noise-reduction axial flow fan | |
| CN111536075B (en) | Blade of ventilator and axial flow ventilator thereof | |
| CN211737550U (en) | Backward centrifugal cross-section noise reduction type centrifugal fan blade | |
| CN113738695A (en) | High-performance centrifugal impeller with parabolic front edge blades for breathing machine | |
| CN203809351U (en) | Fan and air conditioner outdoor unit | |
| CN209925294U (en) | High-efficient single-suction centrifugal fan impeller and centrifugal fan | |
| KR20220079992A (en) | Diffusers, blowers and dust collectors | |
| WO2021017153A1 (en) | Axial-flow fan blade, axial-flow fan, and air conditioner | |
| CN205618392U (en) | Centrifugal fan and smoke ventilator | |
| CN207879687U (en) | A kind of centrifugal blower fan blade wheel with wheel cap reinforcement structure | |
| CN201284757Y (en) | Centrifugal blower and air conditioner employing the same | |
| CN113123979A (en) | Outdoor machine of air conditioner | |
| CN205618406U (en) | Impeller subassembly, centrifugal fan and smoke ventilator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |