CN209818389U - Centrifugal fan impeller - Google Patents
Centrifugal fan impeller Download PDFInfo
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- CN209818389U CN209818389U CN201920250194.9U CN201920250194U CN209818389U CN 209818389 U CN209818389 U CN 209818389U CN 201920250194 U CN201920250194 U CN 201920250194U CN 209818389 U CN209818389 U CN 209818389U
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Abstract
The utility model discloses a centrifugal fan impeller, include: the air conditioner comprises a first impeller disc, a second impeller disc and a plurality of blades arranged between the first impeller disc and the second impeller disc at intervals, wherein an air inlet is formed in the center of the first impeller disc, the plurality of blades are spirally arranged by taking the air inlet as the center, an air outlet is formed in a cavity gap between the first impeller disc and the second impeller disc at the side edge, and the angle range of a blade inlet angle beta 1 is 20-24 degrees; the angle range of the blade outlet angle beta 2 is 18.1-25 degrees; the width B1 of the air inlets of the adjacent blades is between 11 and 12 mm; the width B2 of the adjacent blade air outlet is 21-23 mm. The utility model provides a centrifugal fan impeller, the structure sets up ingeniously, and rationally distributed, makes the loss of the inside flow of blade reduce through the exit angle who improves the blade, has improved the overall efficiency of fan.
Description
Technical Field
The utility model relates to a fan wheel technical field especially relates to a centrifugal fan impeller.
Background
The blade mounting form of the centrifugal fan generally comprises a forward blade, a radial blade and a backward blade, and the common blade is in the shape of a straight line, an arc, a combination of the arc and the straight line, a wing section and the like.
The inlet and outlet angles and the outlet angle of the blades have great influence on the performance of the fan, particularly a small fan, the selection of the inlet and outlet angles of the blades of the existing centrifugal fan easily causes flow separation among the blades, the flow loss inside the blades is caused, and the overall efficiency of the fan is reduced.
Therefore, the prior art has yet to be developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a centrifugal fan impeller to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
in view of the foregoing prior art, the present invention is directed to a centrifugal fan impeller, which reduces the flow loss inside the blades by improving the inlet and outlet angles of the blades, and improves the overall efficiency of the fan.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a centrifugal fan impeller comprising: the impeller comprises a first impeller disc, a second impeller disc and a plurality of blades which are arranged between the first impeller disc and the second impeller disc and are connected with the first impeller disc and the second impeller disc at intervals, wherein the number of the blades is 6, an air inlet is formed in the center of the first impeller disc, the blades are spirally arranged by taking the air inlet as the center, an air outlet is formed in a cavity gap between the first impeller disc and the second impeller disc at the side edge, the blades are arc-shaped thin-wall blades, the shape of a blade vortex channel is smooth and unique, the specific size of the radian of each blade is R18.17mm, the trimming angle of each blade air inlet is 23.7 degrees, the diameter of each air inlet is A1, the diameter of each air outlet is A2, the height of each air outlet is A3, the width of each adjacent blade air inlet is B1, the width of each adjacent blade air outlet is B2, and the included angle between the tangential direction of each blade on one side of each air inlet and the tangential direction of the edge of the corresponding, an included angle between the tangential direction of the blade at one side of the air outlet and the tangential direction of the edge of the air outlet is a blade outlet angle beta 2; wherein the angle range of the blade inlet angle beta 1 is 20-24 degrees; the angle range of the blade outlet angle beta 2 is 18.1-25 degrees; the diameter A1 of the air inlet is 21-26 mm; the width A2 of the air outlet is 40-45 mm; the height A3 of air outlet is between 4 ~ 6mm, adjacent blade air intake width B1 is between 11 ~ 12mm, adjacent blade air outlet width B2 is between 21 ~ 23mm, and the blade height is between 12 ~ 13 mm.
Wherein the blade inlet angle β 1 is 23.7 degrees; the angle of the blade exit angle β 2 is 23 degrees; the width B1 of the adjacent blade air inlet is 11.25 mm; the width B2 of the adjacent blade air outlet is 21.82 mm; the diameter A1 of the air inlet is 23.12 mm; the diameter A2 of the air outlet is 44.6 mm; the height A3 of the air outlet is 5.4 mm; the blade height is 12.19 mm.
Each blade comprises an upper connecting portion connected with a first impeller disc and a lower connecting portion connected with a second impeller disc, the first impeller disc is provided with a first chute in sealing fit with the upper connecting portion, and the second impeller disc is provided with a second chute in sealing fit with the lower connecting portion.
The upper connecting portion of each blade is provided with one or more first bulges which extend outwards and extend into the first chute, and the lower connecting portion of each blade is provided with one or more second bulges which extend outwards and extend into the second chute.
At least one of the first impeller disc, the second impeller disc and the blades is provided with a tooth-shaped structure, and the tooth-shaped structure is one of a rectangle, a W shape, a semicircle, an ellipse or an involute.
Compared with the prior art, the utility model has the advantages of following several aspects:
1. in the utility model, the number of the blades is set to 6, the sharing angle is 60 degrees, the friction force generated when the gas flows is generated in the boundary layer between the blade channel and the wheel disc, and the rotating wind resistance of the impeller is reduced due to the existence of the boundary layer and the reduction of the number of the blades, namely the accumulated thickness of the blades is reduced, the wind speed is increased, and the wind volume and the flow rate are improved;
2. the utility model discloses in, impeller blade height A3 is 5.4mm, air intake diameter A1 is 23.12mm, air outlet diameter A2 is 44.6mm, the looks interval width widen of blade, can make the effective through-flow sectional area of blade way increase, under the same condition, the speed of main air current will increase, more importantly stickness and boundary layer, can not make the air current in the blade way appear the refluence phenomenon, the boundary layer just hardly breaks away from the wall and separates, can not form the vortex district backward flow more, simultaneously the amount of wind can increase, the wind pressure also can strengthen, impeller maximum efficiency can reach 52.50%, can surpass the ordinary wind efficiency 48% level in market;
3. in the utility model, the shape of the impeller blade vortex channel is more smooth and unique, which is completely different from the traditional and the conventional design methods, the tradition pursues high efficiency and rapidness, and adopts multi-segment circular arcs to connect, the conventional software design blade channel is formed by connecting multi-sense multi-segment lines, which can form irregular blade curves, the air volume can be increased, but the curvature of the channel is increased, the flow loss rate of the air is greatly improved, and the power and the service life of the impeller driving motor can be influenced;
4. in the utility model, the specific size of the blade radian of the impeller is R18.17mm, the included angle corresponding to the circular arc is 63 degrees, the shape of the blade path is smooth, the probability of causing boundary layer separation can be reduced, the airflow is not uniformly distributed before the inlet due to the curvature influence of the turning part caused by axial radial change when the impeller rotates, the airflow enters the shape of a single smooth circular arc blade, can smoothly flow into the blade path (zero attack angle) and can uniformly enter, and the boundary layer separation and the air flow loss rate are greatly weakened;
5. in the utility model, the air inlet of the blade manufactured by the actual development and experience of the impeller is not tangent with the inner diameter of the impeller (namely the air inlet of the impeller), but is larger than the size of the air inlet of the impeller, the width of the air inlet of the adjacent blade is 11.25mm, the diameter of the circle cut by the air inlet of the blade is 25.00mm, the resulting trim angle is 26 degrees, which is quite different from the traditional design impeller method and process angle, and can achieve perfect high-pressure high-wind-efficiency impeller, the airflow has prerotation in front of the blade inlet, the impeller has very little influence on the airflow in front of the inlet, because the blade air inlet is not tangent with the impeller air inlet, enough prerotation space is provided before the blade is led into the airflow, and the volume loss is greatly reduced, because the effective sectional area of the airflow is widened when the airflow enters the impeller along the axial direction, the flow of the air entering the impeller is relatively increased, and the efficiency of the impeller is naturally increased.
Drawings
Fig. 1 is a schematic structural diagram of a centrifugal fan impeller.
Fig. 2 is a front view of a centrifugal fan impeller.
Fig. 3 is a schematic structural diagram of a centrifugal fan impeller according to a second embodiment.
In the figure: 100-impeller, 10-first impeller disc, 110-first chute, 20-second impeller disc, 210-second chute, 30-blade, 34-upper connecting part, 341-first bulge, 35-lower connecting part, 351-second bulge, 40-air inlet and 50-air outlet.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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 all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention 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 indicator is changed accordingly.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In a first embodiment, referring to fig. 1 to 2, the present invention provides a centrifugal fan impeller 100, including: the impeller comprises a first impeller disc 10, a second impeller disc 20 and a plurality of blades 30 arranged between the first impeller disc 10 and the second impeller disc 20 and connected with the first impeller disc 10 and the second impeller disc 20 at intervals, wherein the number of the blades 30 is 6 in the embodiment, an air inlet 40 is arranged in the center of the first impeller disc 10, the plurality of blades 30 are spirally arranged by taking the air inlet 40 as the center, an air outlet 50 is formed in a cavity gap between the first impeller disc 10 and the second impeller disc 20 at the side edge, the blades 30 are arc-shaped thin-wall blades, the vortex shape of each blade 30 is smooth and unique, the specific size of the radian of each blade 30 is R18.17mm, the trimming angle of the air inlet 50 of each blade 30 is 23.7 degrees, the width of the air inlet 40 is B1, the diameter of the air outlet 50 is D2, the included angle between the tangential direction of each blade 30 at one side of the air inlet 40 and the tangential direction of the edge of the air inlet 40 is a blade 30 inlet angle beta 1, an included angle between the tangential direction of the blade 30 at one side of the air outlet 50 and the tangential direction of the edge of the air outlet 50 is an outlet angle beta 2 of the blade 30; the angle range of the inlet angle beta 1 of the blade 30 is 20-24 degrees; the angle range of the outlet angle beta 2 of the blade 30 is 18.1-25 degrees; the width B1 of the air inlet of the adjacent blade 30 is between 11mm and 12 mm; the width B2 of the air outlet of the adjacent blade 30 is between 21mm and 23 mm. The design of the ranges of the inlet angle beta 1 and the outlet angle beta 2 of the blades 30 and the width ranges of the air outlets of the inlet and the adjacent blades 30 is combined with the control of the rotating speed of the fan and the like, so that the blades 30 of the impeller 100 are almost not separated in a flowing mode, the secondary flow loss inside the blades 30 is reduced, and meanwhile through the analysis and the experimental test of the flow field inside the impeller 100, the impeller structure of the embodiment has high air outlet static pressure efficiency, the overall efficiency of the fan is improved, the level is about 57%, and the level is higher than the level of 48% of the overall efficiency of the fan in the current market.
Preferably, the angle of the inlet angle β 1 of the blade 30 is 23.7 degrees; the angle of the outlet angle β 2 of the blade 30 is 23 degrees; the width B1 of the air inlet of the adjacent blade 30 is 11.25 mm; the width B2 of the air outlet of the adjacent blade 30 is 21.82 mm. Therefore, the overall efficiency of the centrifugal fan is optimal.
The distance between the bottom surface of the first impeller disc 10 and the top surface of the second impeller disc 20 forms a height A3 of the air outlet 50, the height A3 of the air outlet 50 is 4-6 mm, specifically 5.4mm, and the height A3 of the air outlet 50 is matched with the air inlet width B1 of the adjacent blade 30 and the air outlet width B2 of the adjacent blade 30, so that the structure size of the centrifugal fan impeller is optimized, and the performance of the fan is better.
Second embodiment, as shown in fig. 3, the difference from the first embodiment is that each of the blades 30 includes an upper connecting portion 34 connected to a first impeller disk, a lower connecting portion 35 connected to a second impeller disk, the first impeller disk 10 has a first inclined groove 110 sealingly engaged with the upper connecting portion 34, the second impeller disk 20 has a second inclined groove 210 sealingly engaged with the lower connecting portion 35; the structure is shown in fig. 3 on only one blade 30, not the other blades 30.
In the embodiment, the first impeller disk 10 and the second impeller disk 20 are provided with the inclined grooves, and the blades 30 are provided with the upper connecting portions 34 and the lower connecting portions 35 which can be inserted into the inclined grooves and are in sealing fit with the inclined grooves, so that no gap exists when the blades 30 are matched with the first impeller disk 10 and the second impeller disk 20, a good sealing effect is achieved, airflow entering the impeller 100 is prevented from being mutually streamed in the gap in each passage of the blades 30, the suction air flow and the vacuum degree of the impeller are increased, the suction effect of the impeller 100 is improved, and the whole machine working efficiency of the fan is improved.
Preferably, the upper connecting portion 34 of the vane is provided with one or more first protrusions 341 extending outwardly and into the first chute 110, and the lower connecting portion 35 of the vane is provided with one or more second protrusions 351 extending outwardly and into the second chute 210. The first and second protrusions 341 and 351 are matched with the first and second chutes 110 and 210, so that the connection between the vane 30 and the first and second impeller disks 10 and 210 is firmer, and the connection strength of the vane 30 is improved.
Preferably, the first impeller disk 10, the second impeller disk 20 and at least one of the blades 30 of the present invention is provided with a tooth-shaped structure, wherein the tooth-shaped structure is one of a rectangular shape, a W-shaped shape, a semicircular shape, an oval shape and an involute shape. The adoption of the tooth-shaped structure can effectively reduce noise and air loss.
The utility model discloses centrifugal fan impeller 100's blade 30's number is N, and N is for combining the number, and N is 6 in this embodiment, and the number of blades that combines the number to be 6 can reduce the doubling of frequency noise frequency point that blade 30 sound and static interfered effectively, reduces resonant possibility, guarantees the stability of fan operation.
The embodiment of the utility model provides a centrifugal fan impeller 100, through setting up blade inlet angle beta 1 between 20 ~ 24 degrees, blade outlet angle beta 2 sets up between 18.1 ~ 25 degrees, adjacent blade air intake width B1 sets up between 11mm ~ 12mm, adjacent blade air outlet width B2 sets up between 21mm ~ 23mm, can reduce the flow separation between 30 interior blades of centrifugal fan 100 effectively, reduce the inside flow loss of blade 30, thereby improve fan 100's overall efficiency.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.
Claims (5)
1. The centrifugal fan impeller comprises an impeller and is characterized in that a first impeller disc, a second impeller disc and a plurality of blades which are arranged between the first impeller disc and the second impeller disc and are connected with the first impeller disc and the second impeller disc at intervals are arranged, the number of the blades is 6, the shape of a vortex formed between the blades is smooth and unique, the radian of each blade is R18.17mm, the center of the first impeller disc is provided with an air inlet, the blades are spirally arranged by taking the air inlet as the center, the edge cutting angle of the air inlet of each blade is 23.7 degrees, an air outlet is formed in a cavity gap between the first impeller disc and the second impeller disc at the side edge, and the blades are arc-shaped thin-wall blades;
the width of the adjacent blade air inlets is B1, the width B1 of the adjacent blade air inlets is between 11mm and 12mm, the width of the adjacent blade air outlets is B2, the width B2 of the adjacent blade air outlets is between 21mm and 23mm, the air inlet of the fan is A1, the diameter A1 of the air inlet is between 21mm and 26mm, the diameter A2 of the air outlet is A2, the diameter A2 of the air outlet is between 40 mm and 45mm, the height of the air outlet is A3, the height A3 of the air outlet is between 4mm and 6mm, the height of the blade is between 12mm and 13mm, the included angle between the tangential direction of the blade at one side of the air inlet and the tangential direction of the edge of the air inlet is a blade inlet angle beta 1, the angle range of the blade inlet angle beta 1 is between 20 degrees and 24 degrees, the included angle between the tangential direction of the blade at one side of the air outlet and the tangential direction of the edge, the angle range of the blade outlet angle beta 2 is 18.1-25 degrees.
2. The centrifugal fan impeller of claim 1,
the blade inlet angle β 1 is 23.7 degrees;
the angle of the blade exit angle β 2 is 23 degrees;
the width B1 of the adjacent blade air inlet is 11.25 mm;
the width B2 of the adjacent blade air outlet is 21.82 mm;
the diameter A1 of the air inlet is 23.12 mm;
the diameter A2 of the air outlet is 44.6 mm;
the height A3 of the air outlet is 5.4 mm;
the blade height is 12.19 mm.
3. The centrifugal fan impeller of claim 1 wherein each of the blades includes an upper connection portion connected to a first impeller disk having a first angled slot that sealingly engages the upper connection portion, and a lower connection portion connected to a second impeller disk having a second angled slot that sealingly engages the lower connection portion.
4. The centrifugal fan impeller as claimed in claim 3 wherein the upper attachment portion of the blades is provided with one or more first projections extending outwardly and into the first chute and the lower attachment portion of the blades is provided with one or more second projections extending outwardly and into the second chute.
5. The centrifugal fan impeller of claim 1 wherein at least one of the first impeller disk, the second impeller disk, and the blades is provided with a tooth-shaped structure that is one of rectangular, W-shaped, semi-circular, elliptical, or involute-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920250194.9U CN209818389U (en) | 2019-02-27 | 2019-02-27 | Centrifugal fan impeller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920250194.9U CN209818389U (en) | 2019-02-27 | 2019-02-27 | Centrifugal fan impeller |
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| CN209818389U true CN209818389U (en) | 2019-12-20 |
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| CN201920250194.9U Active CN209818389U (en) | 2019-02-27 | 2019-02-27 | Centrifugal fan impeller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021208496A1 (en) * | 2020-04-16 | 2021-10-21 | 珠海格力电器股份有限公司 | Mixed flow wind wheel, fan assembly, power system, and fan |
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2019
- 2019-02-27 CN CN201920250194.9U patent/CN209818389U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021208496A1 (en) * | 2020-04-16 | 2021-10-21 | 珠海格力电器股份有限公司 | Mixed flow wind wheel, fan assembly, power system, and fan |
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