CN110566499A - arc-shaped oblique flow impeller - Google Patents
arc-shaped oblique flow impeller Download PDFInfo
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- CN110566499A CN110566499A CN201910877891.1A CN201910877891A CN110566499A CN 110566499 A CN110566499 A CN 110566499A CN 201910877891 A CN201910877891 A CN 201910877891A CN 110566499 A CN110566499 A CN 110566499A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
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Abstract
The utility model provides an arc oblique flow impeller, includes the wheel hub that becomes the round platform body, use on wheel hub's the side wheel hub's axis has a plurality of blade for axis annular array, the blade is the even lamellar body of wall thickness, and the tow sides of blade are positive pressure face and negative pressure face respectively, positive pressure face is located and is close to wheel hub goes up one side of the great bottom surface of diameter, the edge of positive pressure face is including root limit, preceding, topside and back that connect gradually, the root limit with wheel hub's side links to each other, back is located and is close to wheel hub goes up one side of the great bottom surface of diameter. According to the comparison of experimental results, the invention can obviously improve the efficiency of the fan.
Description
Technical Field
the invention relates to the field of fans, in particular to an arc-shaped oblique flow impeller.
Background
the diagonal flow fan is widely applied to various places needing ventilation, such as markets, factories and the like, the diagonal flow fan generates airflow by virtue of an impeller, the impeller of the diagonal flow fan enables air to do centrifugal motion and axial motion, and the shape of the impeller plays a key role in the pressure and flow generated by the fan, so that the research on the shape of the impeller of the diagonal flow fan is very important. The existing diagonal flow impeller adopts a single circular plate trapezoidal blade, the generated wind flow is small, the efficiency of a fan is low, the use cost of a user is increased, and the shape of the diagonal flow impeller needs more intensive research and exploration to achieve a better effect.
summary of the invention
The invention aims to solve the technical problems that: the arc-shaped diagonal flow impeller is provided, and the efficiency of a fan can be improved.
The invention creates the solution for solving the technical problem that:
an arc-shaped oblique flow impeller comprises a hub which is a circular truncated cone, the diameter of the bottom surface with the larger diameter on the hub is d, the height of the hub is L, and the included angle between the generatrix of the hub and the axis of the hub is a 1; the hub is characterized in that a plurality of blades are annularly arrayed on the side face of the hub by taking the central axis of the hub as an axis, the blades are sheet bodies with uniform wall thickness, the front face and the back face of each blade are respectively a positive pressure face and a negative pressure face, the positive pressure face is arranged on one side close to the bottom face with larger diameter on the hub, the edge of the positive pressure face comprises a root edge, a front edge, a top edge and a rear edge which are sequentially connected, the root edge is connected with the side face of the hub, and the rear edge is arranged on one side close to the bottom face with larger diameter on the hub; the positive pressure surface is a part of a cylindrical surface with the inner diameter of R, a forming axis is arranged on the positive pressure surface, and the forming axis is superposed with one cylindrical generatrix of the cylindrical surface; the surface formed by the motion trail of the top edge is called a top blade surface, the generatrix of the top blade surface is a straight line, the diameter of the round edge on the top blade surface close to the rear edge is D2, the diameter of the round edge on the top blade surface close to the front edge is D1, and D2 is larger than D1; a first reference surface is arranged on the blade, the central axis of the hub is in the first reference surface, the intersection point of the first reference surface and the root edge is called a reference starting point, and the intersection point of the first reference surface and the top edge is called a reference terminal point;
The blade is in a flat state: connecting the reference starting point and the reference terminal point to form a reference line, wherein a dividing point is arranged on the reference line, the reference line and the forming axis intersect at the dividing point, the clockwise rotation angle from the reference line to the forming axis by taking the dividing point as a vertex is a2, and a2 is less than 90 degrees; the intersection point of the root edge and the rear edge is called a first intersection point, the intersection point of the rear edge and the top edge is called a second intersection point, the intersection point of the top edge and the front edge is called a third intersection point, the intersection point of the front edge and the root edge is called a fourth intersection point, the distance from the boundary point to the reference starting point is H, the distance from the reference starting point to the fourth intersection point is F, the distance from the fourth intersection point to the first intersection point is A, the distance from the third intersection point to the fourth intersection point is B, the distance from the third intersection point to the reference terminal point is G, the distance from the third intersection point to the second intersection point is C, and the distance from the second intersection point to the first intersection point is E.
As a further improvement of the above solution, the top edge is transitionally connected with the front edge by a circular arc, and the top edge is transitionally connected with the rear edge by a circular arc.
As a further improvement of the above solution, the ratio of a and C is 1: (0.95-1.05).
As a further improvement of the scheme, the ratio of D2 to D1 is (138-142): (128-132), and the ratio of D to D2 is 0.58-0.64.
As a further improvement of the scheme, the angle range of the a2 is 33-43 degrees.
as a further improvement of the above solution, D2: a: b: the ratio of E is (138-142): (31-51): (28-48): (23-43), the ratio of D2 to H is (138-142): (9-15).
As a further improvement of the scheme, the ratio of F to A is 0.32-0.36, and the ratio of G to C is 0.52-0.56.
as a further improvement of the scheme, the ratio of D2 to R is (138-142): (44-64).
as a further improvement of the scheme, the angle range of the a1 is 25-35 degrees.
as a further improvement of the scheme, the ratio of D2 to L is (138-142): (18-38).
The beneficial effects of the invention are as follows: the utility model provides an arc oblique flow impeller, includes the wheel hub that becomes the round platform body, use on wheel hub's the side wheel hub's axis has a plurality of blade for axis annular array, the blade is the even lamellar body of wall thickness, and the tow sides of blade are positive pressure face and negative pressure face respectively, positive pressure face is located and is close to wheel hub goes up one side of the great bottom surface of diameter, the edge of positive pressure face is including root limit, preceding, topside and back that connect gradually, the root limit with wheel hub's side links to each other, back is located and is close to wheel hub goes up one side of the great bottom surface of diameter. According to the comparison of experimental results, the invention can obviously improve the efficiency of the fan. The invention is used for the fan.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the described drawings are only a part of the embodiments of the invention, not all embodiments, and that a person skilled in the art will be able to derive other designs and drawings from these drawings without the exercise of inventive effort.
FIG. 1 is a schematic view of a blade in a deployed state according to an embodiment of the invention;
FIG. 2 is a schematic view of a section perpendicular to the forming axis of a blade in an embodiment of the invention;
FIG. 3 is a schematic front view of an embodiment of the present invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a side schematic view of a hub of an embodiment of the present invention;
In the drawings: 101-hub, 102-blade, 103-root edge, 104-leading edge, 105-top edge, 106-trailing edge, 107-positive pressure surface, 108-forming axis, 109-first reference plane, 110-reference start point, 111-reference end point, 112-reference line, 113-dividing point.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be described clearly and completely with reference to the accompanying drawings and the embodiments, so that the objects, the features and the effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
referring to fig. 1 to 5, this is an embodiment of the invention, specifically:
an arc-shaped oblique flow impeller comprises a hub 101 which is a circular truncated cone, the diameter of the bottom surface with the larger diameter on the hub 101 is d, the height of the hub 101 is L, and the included angle between the generatrix of the hub 101 and the axis of the hub 101 is a 1; six blades 102 are annularly arrayed on the side surface of the hub 101 by taking the central axis of the hub 101 as an axis, the blades 102 are sheet bodies with uniform wall thickness, the front surface and the back surface of each blade 102 are respectively a positive pressure surface 107 and a negative pressure surface, the positive pressure surface 107 is arranged on one side close to the bottom surface with larger diameter on the hub 101, the edge of the positive pressure surface 107 comprises a root edge 103, a front edge 104, a top edge 105 and a back edge 106 which are sequentially connected, the root edge 103 is connected with the side surface of the hub 101, and the back edge 106 is arranged on one side close to the bottom surface with larger diameter on the hub 101; the positive pressure surface 107 is a part of a cylindrical surface with the inner diameter of R, a forming axis 108 is arranged on the positive pressure surface 107, and the forming axis 108 is overlapped with one cylindrical generatrix of the cylindrical surface; the surface formed by the motion track of the top edge 105 is called a top surface, the generatrix of the top surface is a straight line, the diameter of the round edge on the top surface close to the rear edge 106 is D2, the diameter of the round edge on the top surface close to the front edge 104 is D1, and D2 is larger than D1; a first reference plane 109 is arranged on the blade 102, the central axis of the hub 101 is in the first reference plane 109, the intersection point of the first reference plane 109 and the root edge 103 is called a reference starting point 110, and the intersection point of the first reference plane 109 and the top edge 105 is called a reference terminal point 111;
The blade 102 is in a flat state: a reference line 112 is formed by connecting the reference starting point 110 and the reference end point 111, a dividing point 113 is arranged on the reference line 112, the reference line 112 and the forming axis 108 intersect at the dividing point 113, the clockwise rotation angle from the reference line 112 to the forming axis 108 with the dividing point 113 as a vertex is a2, and a2 is less than 90 degrees; the intersection of the root edge 103 and the back edge 106 is referred to as a first intersection, the intersection of the back edge 106 and the top edge 105 is referred to as a second intersection, the intersection of the top edge 105 and the front edge 104 is referred to as a third intersection, the intersection of the front edge 104 and the root edge 103 is referred to as a fourth intersection, the distance from the boundary point 113 to the reference starting point 110 is H, the distance from the reference starting point 110 to the fourth intersection is F, the distance from the fourth intersection to the first intersection is a, the distance from the third intersection to the fourth intersection is B, the distance from the third intersection to the reference end point 111 is G, the distance from the third intersection to the second intersection is C, and the distance from the second intersection to the first intersection is E. When the impeller rotates, the positive pressure surface 107 with the arc design generates pressure on air to form wind. The fan blades are designed in an arc shape, so that loss of wind when the wind passes through the fan blades is reduced, pressure is increased, the efficiency of the fan is improved, the air supply flow is increased, and the total pressure is improved.
Further as a preferred embodiment, the ratio of a and C is 1: (0.95-1.05). The top edge 105 of the existing fan blade is long, and the root edge 103 of the existing fan blade is short, so that the fan blade is not beneficial to wind generation, airflow is easy to separate at the root of the fan blade, and the flow of the wind is reduced. The lengths of the root edge 103 and the top edge 105 are close, the length of the blade root is increased, the positive pressure surface 107 of the fan blade drives more wind, the wind flow is increased, and the efficiency of the fan is improved.
because same fan can all demonstrate different performance under different operating modes, carry out data measurement to current oblique flow impeller that adopts single plectane trapezoidal blade under different operating modes, measured data is as shown in table 1:
table 1:
in this embodiment, the length of D2 is 140, the length of D1 is 130, the ratio of D to D2 is 0.61, the angle of a2 is 38 degrees, the length of A is 41, the length of B is 38, the length of C is 41, the length of E is 33, the ratio of F to A is 0.34, the ratio of G to C is 0.54, the length of H is 12, R is 54, the angle of a1 is 30 degrees, and the length of L is 28. The length of this embodiment is in millimeters. The experiment was carried out under the same conditions as in Table 1, and the measured data are shown in Table 2:
table 2:
By comparing the data in tables 1 and 2, it can be seen that the present invention significantly increases the total pressure while significantly improving the fan efficiency over the prior art impeller.
The invention has the advantages that the blades and the hub are organically configured in all size parameters, so that the invention has higher fan efficiency and full pressure. When changing some parameters, the impeller produces different effects. To name a few examples, specifically:
Example 1: the angle range of a2 was changed to 50 degrees, the dimensions associated with a2 were adapted, and the remaining parameters were substantially unchanged, and then the experiment was performed under the same conditions as in table 1, and the measured data are shown in table 3:
Table 3:
by comparing the data in table 1 with the data in tables 2 and 3, it can be seen that when the angle of a2 is changed to 50 degrees, the efficiency and the full pressure of the impeller are reduced to the level of the existing impeller, and even worse effect is generated.
the angle of a2 is changed to 33 degrees, and the fan efficiency measured in the test can be improved by 1.5-1.9% compared with the existing impeller under the same working condition; the angle of a2 is changed to 43 degrees, and the fan efficiency measured in the test can be improved by 1.6-1.8% compared with the existing impeller.
Example 2: when the value of R was changed to 38, the dimension associated with R was adapted, and other parameters were substantially unchanged, and then the experiment was performed under the same conditions as in table 1, and the measured data is shown in table 4:
table 4:
comparing the data in table 1 with the data in tables 2 and 4, it can be seen that the efficiency and the total pressure of the impeller are improved a little but not significantly compared with the effect of the prior impeller when the value of R is changed to 38.
The R is changed into 44, and the fan efficiency measured in the test can be improved by 1.6 to 2.1 percent compared with the existing impeller under the same working condition; r is changed into 64, and the efficiency of the fan can be improved by 1.3-1.6% compared with the existing impeller in the test.
example 3: the ratio of A to C is 1: 2, similar to the current situation that the top edge 105 and the root edge 103 of the existing fan blade are long, the sizes related to a and C are changed adaptively, other parameters are basically unchanged, then the experiment is carried out in the same working condition as that in table 1, and the measured data is shown in table 5:
Table 5:
By comparing the data in table 1 with those in tables 2 and 5, it can be seen that in the case of changing the ratio of a to C to 1: 2, the efficiency and total pressure of the impeller are slightly improved compared with the effect of the existing impeller, but are not obvious.
When the data in table 2 is compared with the data in tables 3, 4 and 5, it can be found that if the angle of a2, the value of R, and the ratio of a to C are changed independently, the improvement effect on the efficiency of the impeller is not great, and the parameters are reasonably set, so that the impeller has the effect of high efficiency and high full pressure.
while the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.
Claims (10)
1. an arc oblique flow impeller which is characterized in that: the hub comprises a hub which is in a round table body, the diameter of the bottom surface with the larger diameter on the hub is d, the height of the hub is L, and the included angle between the generatrix of the hub and the axis of the hub is a 1;
The hub is characterized in that a plurality of blades are annularly arrayed on the side face of the hub by taking the central axis of the hub as an axis, the blades are sheet bodies with uniform wall thickness, the front face and the back face of each blade are respectively a positive pressure face and a negative pressure face, the positive pressure face is arranged on one side close to the bottom face with larger diameter on the hub, the edge of the positive pressure face comprises a root edge, a front edge, a top edge and a back edge which are sequentially connected, the root edge is connected with the side face of the hub, and the back edge is arranged on one side close to the bottom face with larger diameter on the hub;
The positive pressure surface is a part of a cylindrical surface with the inner diameter of R, a forming axis is arranged on the positive pressure surface, and the forming axis is superposed with one cylindrical generatrix of the cylindrical surface;
The surface formed by the motion trail of the top edge is called a top blade surface, the generatrix of the top blade surface is a straight line, the diameter of the round edge on the top blade surface close to the rear edge is D2, the diameter of the round edge on the top blade surface close to the front edge is D1, and D2 is larger than D1;
A first reference surface is arranged on the blade, the central axis of the hub is in the first reference surface, the intersection point of the first reference surface and the root edge is called a reference starting point, and the intersection point of the first reference surface and the top edge is called a reference terminal point;
The blade is in a flat state:
Connecting the reference starting point and the reference terminal point to form a reference line, wherein a dividing point is arranged on the reference line, the reference line and the forming axis intersect at the dividing point, the clockwise rotation angle from the reference line to the forming axis by taking the dividing point as a vertex is a2, and a2 is less than 90 degrees;
The intersection point of the root edge and the rear edge is called a first intersection point, the intersection point of the rear edge and the top edge is called a second intersection point, the intersection point of the top edge and the front edge is called a third intersection point, the intersection point of the front edge and the root edge is called a fourth intersection point, the distance from the boundary point to the reference starting point is H, the distance from the reference starting point to the fourth intersection point is F, the distance from the fourth intersection point to the first intersection point is A, the distance from the third intersection point to the fourth intersection point is B, the distance from the third intersection point to the reference terminal point is G, the distance from the third intersection point to the second intersection point is C, and the distance from the second intersection point to the first intersection point is E.
2. The arcuate oblique flow impeller of claim 1, wherein: the top edge is in transition connection with the front edge through an arc, and the top edge is in transition connection with the rear edge through an arc.
3. the arcuate oblique flow impeller of claim 1, wherein: the ratio of A to C is 1: (0.95-1.05).
4. the arcuate oblique flow impeller of claim 1, wherein: the ratio of D2 to D1 is (138-142): (128-132), and the ratio of D to D2 is 0.58-0.64.
5. The arcuate oblique flow impeller of claim 1, wherein: the angle range of a2 is 33-43 degrees.
6. The arcuate oblique flow impeller of claim 1, wherein: d2: a: b: the ratio of E is (138-142): (31-51): (28-48): (23-43), the ratio of D2 to H is (138-142): (9-15).
7. The arcuate oblique flow impeller of claim 1, wherein: the ratio of F to A is 0.32-0.36, and the ratio of G to C is 0.52-0.56.
8. The arcuate oblique flow impeller of claim 1, wherein: the ratio of D2 to R is (138-142): (44-64).
9. the arcuate oblique flow impeller of claim 1, wherein: the angle range of a1 is 25-35 degrees.
10. The arcuate oblique flow impeller of claim 1, wherein: the ratio of D2 to L is (138-142): (18-38).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910877891.1A CN110566499B (en) | 2019-09-17 | 2019-09-17 | Arc diagonal flow impeller |
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| CN201910877891.1A CN110566499B (en) | 2019-09-17 | 2019-09-17 | Arc diagonal flow impeller |
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| CN110566499B CN110566499B (en) | 2024-03-19 |
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| CN106122091A (en) * | 2016-08-23 | 2016-11-16 | 佛山市南海九洲普惠风机有限公司 | There is antecurvature efficient quiet impeller |
| CN106122092A (en) * | 2016-08-23 | 2016-11-16 | 佛山市南海九洲普惠风机有限公司 | A kind of novel blade and use the impeller of this fan blade |
| CN107559235A (en) * | 2017-09-07 | 2018-01-09 | 佛山市南海九洲普惠风机有限公司 | A kind of fan blade and impeller of ternary distortion blower fan |
| CN210769509U (en) * | 2019-09-17 | 2020-06-16 | 佛山市南海九洲普惠风机有限公司 | Arc-shaped oblique flow impeller |
-
2019
- 2019-09-17 CN CN201910877891.1A patent/CN110566499B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080018838A (en) * | 2006-08-25 | 2008-02-28 | 산요덴키가부시키가이샤 | Axial flow fan and method for designing addition winglet thereof |
| CN106122091A (en) * | 2016-08-23 | 2016-11-16 | 佛山市南海九洲普惠风机有限公司 | There is antecurvature efficient quiet impeller |
| CN106122092A (en) * | 2016-08-23 | 2016-11-16 | 佛山市南海九洲普惠风机有限公司 | A kind of novel blade and use the impeller of this fan blade |
| CN107559235A (en) * | 2017-09-07 | 2018-01-09 | 佛山市南海九洲普惠风机有限公司 | A kind of fan blade and impeller of ternary distortion blower fan |
| CN210769509U (en) * | 2019-09-17 | 2020-06-16 | 佛山市南海九洲普惠风机有限公司 | Arc-shaped oblique flow impeller |
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