CN214741820U - Bionic combined structure applied to impeller flow control - Google Patents
Bionic combined structure applied to impeller flow control Download PDFInfo
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- CN214741820U CN214741820U CN202120680212.4U CN202120680212U CN214741820U CN 214741820 U CN214741820 U CN 214741820U CN 202120680212 U CN202120680212 U CN 202120680212U CN 214741820 U CN214741820 U CN 214741820U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model discloses a be applied to impeller flow control's bionical integrated configuration. The bionic combined structure applied to impeller flow control comprises one or more of a shell-like wrinkle structure on the blade, a bird head structure on the blade top or a whale skin groove structure on the blade, and the three structures are applied to the fan blade singly or in combination according to different flow control requirements. The bionic combined structure applied to impeller flow control has the advantages of improving the structural strength, promoting the orderly and concentrated flow of gas, inhibiting the premature separation of the gas, reducing the noise, controlling the flow guidance of the gas and controlling the deformation direction and amplitude of the impeller. The impeller can be applied to impeller structures of different types such as axial flow, centrifugation, oblique flow (mixed flow) and the like.
Description
Technical Field
The utility model relates to a fan technical field has especially related to a be applied to impeller flow control's bionical integrated configuration.
Background
In the field of fans, noise is inevitably generated in the running process of the fans, and under the condition of not losing performance, the noise reduction is the direction of efforts. The generation of noise on the blade is often accompanied with turbulence, turbulent flow, blade tip leakage flow and the like, and is mainly concentrated on the blade top, the blade front edge, the blade tail edge and the like, and the blade top inevitably has leakage flow due to the blade tip clearance, so that the generation of noise is caused, and how to reduce the leakage flow to ensure that the airflow flows smoothly is a problem; the large turbulence, separation flow, etc. are also generated at the positions of the front edges and the rear edges of the blades, so that the noise is accelerated and generated due to the rotation of the blades, resonance, etc. and the unexpected secondary flow not only generates the noise but also has negative effects on other performances of the fan.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model relates to a be applied to impeller flow control's bionical integrated configuration.
The utility model adopts the following technical scheme:
the utility model provides a be applied to bionical integrated configuration of impeller flow control, includes one or more of shell line fold structure on the blade, blade top class bird head structure or class whale skin slot structure on the blade, and three kinds of structures are according to different flow control needs, and the fan blade is applied to alone or the combination.
Preferably, the shell-like wrinkle structure on the blade is arranged at the tail edge of the blade, the blade tip bird head-like structure is arranged at the blade tip of the fan blade, and the whale-like skin groove structure on the blade is arranged at the front edge of the blade. The blade shell-like wrinkle structure comprises but not limited to the application at the trailing edge position of the blade, the blade top bird head structure is generally applied at the blade top position of the impeller, the blade whale-like skin groove structure comprises but not limited to the application at the leading edge position of the blade, the three structures can be applied to the impeller independently, and a plurality of combinations can be applied to the impeller.
Preferably, the shell-like wrinkle structure on the blade belongs to a three-dimensional structure, has a wave shape on a transverse plane and a longitudinal plane, and naturally transitions to the periphery of the blade to form an uneven surface of the shell-like wrinkle.
The shell-like wrinkle structure on the blade is a wave-shaped structure, and the typical wave shape of the wave-shaped structure meets the formula of a sine curve in the transverse direction and the longitudinal direction
A is the amplitude of the vibration,
d is the diameter of the wind wheel; omega is the angular velocity of the light beam,
is used as an initial phase of the reaction,
k is the offset distance,
the unit is millimeter.
Preferably, the typical wave shape of the shell-like wrinkle structure on the blade is controlled by a sinusoidal formula or by a plurality of different sinusoidal formulas to control a section of curve respectively in the transverse direction and the longitudinal direction, and finally the wave controlled by one or more different sinusoidal formulas is smoothly transited into a complete wave curve.
Preferably, the blade top bird-like head structure belongs to a three-dimensional structure, is positioned on the blade top of the fan blade, is provided with a flanging which is bent from the pressure surface of the fan blade to the suction surface, and is in a bird-like head shape.
Preferably, the blade top bird head structure is in smooth transition between the blade tip and the front edge of the blade, the maximum chord-wise distance from the smooth section of the blade tip to the initial position of the flanging is a,
the unit is millimeter.
Preferably, the radial distance from the end of the flanging of the blade tip bird-head-like structure to the farthest position of the tail of the flanging is b,
the unit is millimeter.
Preferably, the maximum bending height of the flanging of the blade top bird-like head structure from the pressure surface to the suction surface is h,
the unit is millimeter.
Preferably, the maximum section thickness of the tip bird-head-like structure from the blade tip to the initial part of the flanging is Tmax,
the minimum thickness of the cross section at the end of the flanging is Tmin,
the unit is millimeter.
Preferably, the structure of the whale skin grooves on the blades is a strip-shaped groove, and according to the flow characteristic condition of the fan blades, the groove section radius, the pit depth, the groove interval, the number, the length and the distribution mode of the strip-shaped groove are adjusted as required.
Preferably, the section of the strip-shaped groove of the whale skin groove structure on the blade is a part of circular arc, and the maximum radius of the circular arc is
The unit is millimeter.
Preferably, the maximum depth of the strip-shaped grooves of the whale skin groove structure on the blade is t,
the unit is millimeter.
Preferably, the maximum distance between the strip-shaped grooves of the whale skin groove structure on the blade is c,
the unit is millimeter.
Preferably, the maximum number of the strip-shaped grooves of the whale skin groove structure on the blade is n, and n is equal to (0, 50).
Preferably, the longest strip-shaped groove of the whale skin groove structure on the leaf is L,
the unit is millimeter.
Preferably, the distribution mode of the strip-shaped grooves of the whale skin groove structure on the blade is a mode that a plurality of grooves are distributed in a row, a mode that a plurality of grooves are alternately distributed in multiple rows, or a mode that a plurality of grooves are distributed in multiple rows and in the same row. The distribution of the strip-shaped grooves of the whale-like skin groove structure on the leaf includes, but is not limited to, three typical modes.
The utility model has the advantages that: the bionic structure can be applied to a plurality of types of impellers, including but not limited to an impeller with equal wall thickness, a wing-type impeller, an axial-flow impeller, a centrifugal impeller and the like. According to the description and the requirement of the bionic structure, one or more combination modes of the shell-like wrinkle structure on the blade, the bird head structure on the blade top and the whale skin groove structure on the blade are applied to the structural design of the impeller, so that the noise generated by the impeller can be effectively reduced, and the working efficiency of the impeller is improved. The utility model discloses obtain anticipated effect in the practical application process, can be in the aspect effective application such as not unidimensional size, different application scenario, different working methods.
Drawings
FIG. 1 is a schematic view of the blade trailing edge line development in line.
Fig. 2 is a diagram of several typical curves of a shell-like wrinkle structure on a blade.
FIG. 3 is a schematic view of an impeller tip with a tip bird head-like configuration.
FIG. 4 is a schematic cross-sectional view of an impeller tip with a tip bird head-like configuration.
FIG. 5 is a schematic view of the structure of the gutters of the whale-like skin on the leaf.
FIG. 6 is a schematic view showing the distribution of the grooves in the structure of the whale skin on the leaf.
FIG. 7 is a schematic diagram of a first structure of a bionic composite structure typically applied to an impeller.
Fig. 8 is a partial schematic view of the blade portion of fig. 7.
FIG. 9 is a schematic diagram of a second structure of a bionic composite structure typically applied to an impeller.
Fig. 10 is a partial schematic view of the blade portion of fig. 9.
Fig. 11 is a partial schematic view of the blade portion of fig. 9.
FIG. 12 is a schematic diagram of a third structure of a bionic composite structure typically applied to an impeller.
Fig. 13 is a partial schematic view of the blade portion of fig. 12.
Fig. 14 is a partial schematic view of the blade portion of fig. 12.
In the figure: 1-blade trailing edge line; 2-straight line of tail edge line; 3-smooth tip section; 4-transverse bending distance of the flanging; 5-longitudinal bending height of the flanging; 6-maximum blade tip section thickness; 7-minimum thickness of the tail section of the flanging; 8-pit depth; 9-a plurality of grooves are distributed in a straight line; 10-a plurality of grooves are alternately distributed in multiple rows; 11-a plurality of grooves are distributed in a plurality of rows and in the same row; 12-centrifugal impeller with equal wall thickness; 13-a wing-type centrifugal impeller; 14-a wing type single-side folded centrifugal impeller; 15-axial flow impeller with equal wall thickness; 16-airfoil axial flow impeller; 17-airfoil type single-side folded axial flow impeller; 18-shell-like fold structure on the leaf; 19-leaf tip bird head like structure; 20-whale skin groove structure on leaf.
Detailed Description
The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:
example (b): as shown in fig. 1 to 7, a bionic combined structure applied to impeller flow control comprises one or more of a leaf top shell-like corrugated structure, a leaf top bird head structure or a leaf top whale skin groove structure, and the three structures are applied to a fan blade singly or in combination according to different flow control requirements.
The shell-like wrinkle structure on the blade is arranged at the tail edge of the blade, belongs to a three-dimensional structure, has a wave shape on a transverse plane and a longitudinal plane, and naturally transits to the periphery of the blade to form the uneven surface of the shell-like wrinkle. The shell-like wrinkle structure on the blade is a wave-shaped structure, and the typical wave shape of the wave-shaped structure meets the formula of a sine curve in the transverse direction and the longitudinal direction
A is the amplitude of the vibration,
d is the diameter of the wind wheel; omega is the angular velocity of the light beam,
is used as an initial phase of the reaction,
k is the offset distance,
the unit is millimeter. The typical wave shape of the shell-like wrinkle structure on the blade is controlled by a sinusoidal formula or a plurality of different sinusoidal formulas to respectively control a section of curve in the transverse direction and the longitudinal direction, and finally the waves controlled by one or more different sinusoidal formulas are smoothly transited into a complete wave curve.
The shell-like wrinkle structure 18 on the blade is designed according to shell wrinkles, has the effects of increasing the structural strength of the impeller, guiding the flow, promoting the air flow to be more orderly concentrated, reducing unnecessary flow and other adverse factors, inhibiting the premature separation of gas and the like, breaking the boundary layer of the original smooth surface through the shell-like wrinkle structure, generating favorable turbulence, inhibiting the gas separation, thereby reducing the working resistance of the impeller and reducing the generation of noise. In the design, the tail edge line 1 is firstly unfolded into a tail edge line unfolding straight line 2, as shown in fig. 1, sinusoidal curves are drawn on a transverse plane and a longitudinal plane according to the mode of fig. 2 as required, the curve in fig. 2 is a typical curve, for example, the curve can be controlled by one sinusoidal formula, a section of curve can be controlled by a plurality of different sinusoidal formulas, and finally, the waves controlled by the different sinusoidal formulas are smoothly transited into a complete wave curve, which is the curve generation method of the required bionic shell folds. The initial position can be from any position between P1-P4, then a curved surface is generated according to the folding range required to be made on the impeller, the pressure surface or the suction surface can be independently folded, the two surfaces can be folded, even one surface has large folding area and one surface has small folding area, and the final folding is smoothly transited with other connecting surfaces after being generated, so that the method for generating the shell-like fold structure on the required blade is provided.
The blade top type bird head structure is arranged at the blade top of the fan blade, belongs to a three-dimensional structure, is positioned at the blade top of the fan blade, is provided with a flanging which is bent from the pressure surface of the fan blade to the suction surface and is in a bird head-like shape. The blade top bird head structure is in smooth transition between the blade tip and the front edge of the blade, the maximum chord-wise distance from the smooth blade tip section to the initial flanging position is a,
the unit is millimeter. The radial distance from the end of the flanging of the blade top bird head-like structure to the farthest position of the tail of the flanging is b,
the unit is millimeter. The maximum bending height of the flanging of the blade top bird head structure from the pressure surface to the suction surface is h,
the unit is millimeter. The maximum thickness of the section of the blade top bird head structure from the blade tip to the initial flanging is Tmax,
the minimum thickness of the cross section at the end of the flanging is Tmin,
the unit is millimeter.
The tip bird head structure 19 is designed according to the bird head of the pacific bird, has the function of increasing the strength of the tip of the impeller, has the function of reducing the flow resistance of the tip of the impeller, has the function of inhibiting the leakage flow at the tip of the impeller, and reduces the generation of noise. The beak of the peaceful bird is a tip, and the tip of the blade wheel is safe in practical application, and the tip angle cannot appear smoothly, for example, as a smooth section 3 of the blade tip in fig. 3, important structural parameters of the bionic peaceful bird head include that the maximum distance from the initial position of the flanging to the smooth section of the blade tip is a, the transverse bending distance 4 from the intersection point of the flanging crease and the tail edge to the farthest position of the end of the flanging is b, the longitudinal bending height 5 of the flanging from the pressure surface to the suction surface is h, the maximum thickness 6 of the blade tip section from the upper section of the blade tip to the initial position of the flanging is Tmax, and the minimum thickness 7 of the section at the end of the flanging is Tmin and the like, which meet the value range in the foregoing description.
The whale-like skin groove structure on the blade is arranged at the front edge of the blade. The structure of the whale skin grooves on the blades is a strip-shaped groove, and the groove section radius, the pit depth 8, the groove interval, the number, the length and the distribution mode of the strip-shaped groove are adjusted according to the flow characteristic condition of the fan blades. The section of a strip-shaped groove of the whale skin-like groove structure on the blade is a part of circular arc, and the radius of the maximum circular arc is
The unit is millimeter. The maximum depth of the strip-shaped grooves of the whale skin groove structure on the blade is t,
the unit is millimeter. The maximum distance between the strip-shaped grooves of the whale skin groove structure on the leaf is c,
the unit is millimeter. The maximum number of the strip-shaped grooves of the whale skin groove structure on the leaf is n, and n belongs to (0, 50). The longest strip-shaped groove of the whale skin groove structure on the leaf is L,
the unit is millimeter.
The whale skin groove structure 20 on the blade is designed according to the whale belly groove, has the flow guiding function, has the functions of inhibiting the premature separation of air flow, controlling the deformation direction and amplitude of the impeller, improving the working efficiency of the impeller and reducing the generation of noise. As shown in fig. 5 and 6, the whale-like skin grooves on the blades are strip-shaped grooves, and the strip-shaped grooves are adjusted as required according to the flow characteristic of the impeller, and the groove section radius, the pit depth, the groove interval, the number, the length, the distribution mode and the like are different. Important parameters of the structure include that the section of the strip-shaped groove is a part of circular arc of a circle, the radius r of the maximum circular arc, the maximum pit depth t of the strip-shaped groove, the maximum distance c of the strip-shaped groove, the maximum number n of the strip-shaped grooves, the longest L of the strip-shaped grooves and the like, which meet the value range in the above description. The distribution mode of the strip-shaped grooves of the whale skin groove structure on the leaf comprises but is not limited to three typical modes: a plurality of grooves are distributed in a straight line 9, a plurality of grooves are distributed in a multi-column alternating manner 10, and a plurality of grooves are distributed in a multi-column same-row manner 11.
The bionic structure can be applied independently or in combination of multiple structures, can be applied to axial flow or centrifugal impellers with equal wall thickness, can also be applied to axial flow or centrifugal impellers of wing type, and can be applied to one side or two sides of the axial flow or centrifugal impellers of the wing type.
Fig. 7-14 show several typical combinations and applications, which are named as equal-wall-thickness centrifugal impeller 12, airfoil-shaped centrifugal impeller 13, airfoil-shaped single-side corrugated centrifugal impeller 14, equal-wall-thickness axial-flow impeller 15, airfoil-shaped axial-flow impeller 16, and airfoil-shaped single-side corrugated axial-flow impeller 17.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.
Claims (10)
1. A bionic combined structure applied to impeller flow control is characterized by comprising one or more of a shell-like wrinkle structure on a blade, a blade top bird head structure or a whale skin groove structure on the blade, and the three structures are applied to a fan blade singly or in combination according to different flow control requirements.
2. The bionic combination structure applied to impeller flow control as claimed in claim 1, wherein the shell-like fold structure on the blade is arranged at the trailing edge of the blade, the bird head structure on the blade top is arranged at the blade top of the fan blade, and the whale-like skin groove structure on the blade is arranged at the leading edge of the blade.
3. The bionic combination structure applied to impeller flow control as claimed in claim 1, wherein the shell-like corrugation structure on the blade is a three-dimensional structure, has a wave shape on a transverse plane and a longitudinal plane, and naturally transits to the periphery of the blade to form an uneven surface of the shell-like corrugation.
4. The bionic combination structure applied to impeller flow control as claimed in claim 3, wherein the conchoidal fold structure on the blade is a wave-shaped structure, and the typical wave shape is such that the wave shape in the transverse direction and the longitudinal direction satisfies the sine curve formula
A is the amplitude of the vibration,
d is the diameter of the wind wheel; omega is the angular velocity of the light beam,
is used as an initial phase of the reaction,
k is the offset distance,
the unit is millimeter.
5. A biomimetic combination structure as claimed in claim 3, wherein the typical wave shape of the shell-like corrugated structure on the blade is controlled by a sinusoidal formula or by a plurality of different sinusoidal formulas to control a segment of the curve in the transverse and longitudinal directions, and the last wave controlled by one or more different sinusoidal formulas smoothly transitions into a complete wave curve.
6. The bionic combination structure applied to impeller flow control as claimed in claim 1, wherein the blade top bird head-like structure is a three-dimensional structure, is located at the blade top of the fan blade, has a flanging bent from the pressure surface of the fan blade to the suction surface, and is in a bird head-like shape.
7. The bionic combination structure applied to impeller flow control as claimed in claim 6, wherein the tip of the blade and the front edge of the blade tip-like bird head structure are in smooth transition, the maximum chord-wise distance from the smooth section of the blade tip to the initial position of the flanging is a,
unit millimeter; the radial distance from the end of the flanging of the blade top bird head-like structure to the farthest position of the tail of the flanging is b,
unit millimeter; the maximum bending height of the flanging of the blade top bird head structure from the pressure surface to the suction surface is h,
unit millimeter; the maximum thickness of the section of the blade top bird head structure from the blade tip to the initial flanging is Tmax,
the minimum thickness of the cross section at the end of the flanging is Tmin,
the unit is millimeter.
8. The bionic combination structure applied to impeller flow control as claimed in claim 1, wherein the whale skin groove structure on the blade is a strip groove, and the groove section radius, pit depth, groove spacing, groove number, length and distribution mode of the strip groove are adjusted as required according to the flow characteristic of the fan blade.
9. The bionic combination structure applied to impeller flow control as claimed in claim 8, wherein the cross section of the strip-shaped groove of the whale-skin-like groove structure on the blade is a part of an arc of a circle, and the maximum arc radius is
Unit millimeter; the maximum depth of the strip-shaped grooves of the whale skin groove structure on the blade is t,
unit millimeter; the maximum distance between the strip-shaped grooves of the whale skin groove structure on the leaf is c,
unit millimeter; the maximum number of the strip-shaped grooves of the whale skin groove structure on the leaf is n, and n belongs to (0, 50); the longest strip-shaped groove of the whale skin groove structure on the leaf is L,
the unit is millimeter.
10. The bionic combination structure applied to impeller flow control as claimed in claim 1, wherein the distribution of the strip-shaped grooves of the whale-skin-like groove structure on the blade is that a plurality of grooves are distributed in a row or a plurality of grooves are distributed in a multi-row alternative mode or a plurality of grooves are distributed in a multi-row same-row mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120680212.4U CN214741820U (en) | 2021-04-02 | 2021-04-02 | Bionic combined structure applied to impeller flow control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120680212.4U CN214741820U (en) | 2021-04-02 | 2021-04-02 | Bionic combined structure applied to impeller flow control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214741820U true CN214741820U (en) | 2021-11-16 |
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ID=78600023
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120680212.4U Active CN214741820U (en) | 2021-04-02 | 2021-04-02 | Bionic combined structure applied to impeller flow control |
Country Status (1)
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| CN (1) | CN214741820U (en) |
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2021
- 2021-04-02 CN CN202120680212.4U patent/CN214741820U/en active Active
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