CN108547793B - Axial flow impeller - Google Patents
Axial flow impeller Download PDFInfo
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- CN108547793B CN108547793B CN201810400885.2A CN201810400885A CN108547793B CN 108547793 B CN108547793 B CN 108547793B CN 201810400885 A CN201810400885 A CN 201810400885A CN 108547793 B CN108547793 B CN 108547793B
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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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
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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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
- F04D29/386—Skewed blades
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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
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application discloses an axial flow impeller, which comprises a base with a rotating shaft, wherein a plurality of blade bodies are arranged on the base, and the blade bodies are sequentially determined entities of a space distortion curve ring corresponding to an inner side forming curve, a space distortion curve ring corresponding to at least one middle forming curve and a space distortion curve ring corresponding to an outer side forming curve. The application avoids the problems that the defective rate is low and the dimension detection cannot be performed because the blade shape of the blade body is determined empirically in the field by definitely defining and limiting the shape of the blade body in a three-dimensional space. The blade body of the application can provide high full-pressure air flow under the condition of low speed through computer simulation and a large number of experiments, and meanwhile, the efficiency of the axial flow fan using the application is very high. The application is used for the axial flow fan.
Description
Technical Field
The application relates to an axial flow impeller which can improve full pressure and efficiency of aerodynamic equipment parts at low rotation speed.
Background
The axial flow fan has very wide application, namely, the air flow in the same direction with the axis of the fan blade, such as an electric fan, and the fan of the air conditioner external unit is an axial flow running fan. This is called "axial flow" because the gas flows parallel to the fan axis. Axial fans are commonly used in applications where flow requirements are high and pressure requirements are low. The axial flow fan fixes the position and moves the air. The axial flow fan mainly comprises a fan impeller and a shell, and has a simple structure but very high data requirements. The existing axial flow impeller is not subjected to scientific fluid dynamics calculation, and is low in full pressure and efficiency under low-rotation speed rotation.
Disclosure of Invention
The application aims to solve the technical problems that: an axial flow impeller is provided which can achieve an improvement in full pressure and efficiency at a low rotational speed.
The application solves the technical problems as follows:
the axial flow impeller comprises a base with a rotating shaft, wherein a plurality of blade bodies are arranged on the base, the blade bodies are annularly and uniformly distributed around the rotating shaft, the shape of each blade body is determined by at least three space twist curve rings which are arranged at intervals, the blade bodies are provided with foundation lines, the foundation lines are mutually perpendicular to the rotating shaft, all the space twist curve rings are curves on a forming cylindrical surface, and the axis of the forming cylindrical surface coincides with the rotating shaft;
all the space distortion curve rings on each blade body are provided with projection curves on a basic projection plane, the basic projection plane passes through the rotating shaft and is perpendicular to the basic line, an X-Y coordinate system is established on the basic projection plane, and the Y axis coincides with the rotating shaft;
the projection curve is formed by transforming a front forming curve on an X-Y coordinate system, and the origin of the X-Y coordinate system is arranged on a basic line;
front forming curve:
the method comprises the steps that a plurality of positioning points positioned on an X-Y coordinate system are sequentially connected by a strip-shaped line or a straight line to form a pre-formed curve, a base point is arranged in an area surrounded by the pre-formed curve, the X coordinate of the base point is X delta which is 2A times, A is smaller than 1 and larger than 0, X delta is the X coordinate of a midpoint of a projection line of the pre-formed curve on the X axis, Y coordinate of the base point is Y delta which is 2B times, B is smaller than 1 and larger than 0, Y delta is the Y coordinate of a midpoint of the projection line of the pre-formed curve on the Y axis, the pre-formed curve is integrally moved in the X-Y coordinate system, the base point is moved to an original point on the X-Y coordinate, and then the pre-formed curve is rotated around the base line by an angle C, so that the projection curve is formed;
the projection curve corresponding to the space distortion curve ring of the blade body positioned at the innermost side is called an inner shaping curve, and the front shaping curve corresponding to the inner shaping curve is called an inner front shaping curve;
the inner front forming curve is formed by connecting the following positioning points in sequence by using strip-shaped lines or straight lines:
the A of the inner pre-forming curve is 0.377, the B is 0.42, the C is 31-37 degrees, and the coordinate values of all positioning points of the inner pre-forming curve and the tolerance of A, B are within +/-5 percent;
the projection curve corresponding to the space distortion curve ring at the outermost side of the blade body is called an outer shaping curve, and the front shaping curve corresponding to the outer shaping curve is called an outer front shaping curve;
the outer front forming curve is formed by connecting the following positioning points in sequence by using strip-shaped lines or straight lines:
the A of the outer pre-forming curve is 0.377, the B is 0.42, the C is 7-13 degrees, and the coordinate values of all positioning points of the outer pre-forming curve and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the outer forming curve is located is an outer forming cylindrical surface, and the diameter of the outer forming cylindrical surface is D;
the forming cylindrical surface where the inner forming curve is located is an inner forming cylindrical surface, and the diameter of the inner forming cylindrical surface is 0.3 D+/-5%;
the projection curve corresponding to the space distortion curve ring of the blade body between the outer shaping curve and the inner shaping curve is called an intermediate shaping curve;
at least one middle forming curve is arranged between the outer forming curve and the inner forming curve, and the middle forming curve comprises any one or more or all of a second middle forming curve, a third middle forming curve, a fourth middle forming curve and a fifth middle forming curve from inside to outside;
the front forming curve corresponding to the middle forming curve is called a middle front forming curve, and the middle front forming curve is formed by sequentially connecting all positioning points on the middle front forming curve by using a strip line or a straight line according to sequence numbers;
the coordinates of the locating points corresponding to the second intermediate forming curve are as follows:
the corresponding A of the second intermediate forming curve is 0.377, B is 0.42, C is 30-36 degrees, and the coordinate values of all positioning points of the second intermediate forming curve and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the second middle forming curve is located is a second forming cylindrical surface, and the diameter of the second forming cylindrical surface is 0.45 D+/-5%;
the coordinates of the positioning points corresponding to the third intermediate forming curve are as follows:
the corresponding A of the third intermediate forming curve is 0.4, B is 0.423, C is 23-29 degrees, and the coordinate values of all positioning points of the third intermediate forming curve and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the third middle forming curve is located is a third forming cylindrical surface, and the diameter of the third forming cylindrical surface is 0.59 D+/-5%;
the coordinates of the positioning points corresponding to the fourth intermediate forming curve are as follows in sequence:
the corresponding A of the fourth intermediate forming curve is 0.427, the corresponding B of the fourth intermediate forming curve is 0.422, the corresponding C of the fourth intermediate forming curve is 17-23, and the coordinate values of all positioning points of the fourth intermediate forming curve and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the fourth middle forming curve is located is a fourth forming cylindrical surface, and the diameter of the fourth forming cylindrical surface is 0.72 D+/-5%;
the coordinates of the positioning points corresponding to the fifth intermediate forming curve are as follows in sequence:
the corresponding A of the fifth intermediate forming curve is 0.452, the corresponding B of the fifth intermediate forming curve is 0.42, the corresponding C of the fifth intermediate forming curve is 12-18 degrees, and the coordinate values of all positioning points of the fifth intermediate forming curve and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the fifth middle forming curve is located is a fifth forming cylindrical surface, and the diameter of the fifth forming cylindrical surface is 0.86 D+/-5%;
C>C>C>C>C>C；
the blade body is a solid body which is sequentially determined by a space distortion curve ring corresponding to an inner shaping curve, a space distortion curve ring corresponding to at least one middle shaping curve and a space distortion curve ring corresponding to an outer shaping curve.
As a further improvement of the above, the blade body is an aluminum member.
As a further improvement of the scheme, the pre-forming curve is formed by sequentially connecting a plurality of positioning points on an X-Y coordinate system by using a strip-shaped line.
As a further improvement of the scheme, the front forming curve is formed by sequentially connecting a plurality of positioning points positioned on an X-Y coordinate system by using straight lines.
As a further improvement of the scheme, the space distortion curve ring corresponding to the inner shaping curve of the blade body is smoothly passed through the space distortion curve ring corresponding to the middle shaping curve from inside to outside, and then smoothly transits to the space distortion curve ring corresponding to the outer shaping curve.
As a further improvement of the above scheme, the points on the space twist curve ring with the inner shaping curve number i being in projection relation with each other are the start points of the guide lines, the points on the space twist curve ring with the positioning points with the intermediate shaping curve number j being in projection relation with each other are the middle points of the guide lines, and the points on the space twist curve ring with the outer shaping curve number k being in projection relation with each other are the end points of the guide lines; i=j=k, the guide line sequentially passes through the initial point of the guide line, the middle point of the guide line and the end point of the guide line, the guide line is a strip-like line, the blade body is guided by the guide line, and the space distortion curve ring corresponding to the inner side forming curve sequentially smoothly passes through the space distortion curve ring corresponding to the middle forming curve from inside to outside, and then smoothly transits to the space distortion curve ring corresponding to the outer side forming curve.
The beneficial effects of the application are as follows: the axial flow impeller comprises a base with a rotating shaft, wherein a plurality of blade bodies are arranged on the base, the blade bodies are annularly and uniformly distributed around the rotating shaft, the shape of each blade body is determined by at least three space twist curve rings which are arranged at intervals, the blade bodies are provided with foundation lines, the foundation lines are mutually perpendicular to the rotating shaft, all the space twist curve rings are curves on a forming cylindrical surface, and the axis of the forming cylindrical surface coincides with the rotating shaft;
all the space distortion curve rings on each blade body are provided with projection curves on a basic projection plane, the basic projection plane passes through the rotating shaft and is perpendicular to the basic line, an X-Y coordinate system is established on the basic projection plane, and the Y axis coincides with the rotating shaft;
the projection curve is formed by transforming a front forming curve on an X-Y coordinate system, and the origin of the X-Y coordinate system is arranged on a basic line;
front forming curve:
the method comprises the steps that a plurality of positioning points positioned on an X-Y coordinate system are sequentially connected by a strip-shaped line or a straight line to form a pre-forming curve, a base point is arranged in an area surrounded by the pre-forming curve, the X coordinate of the base point is X delta which is 2A times, A is smaller than 1 and larger than 0, X delta is the X coordinate of a midpoint of a projection line of the pre-forming curve on the X axis, (namely, assuming that the X coordinate of a starting point of the projection line of the pre-forming curve on the X axis is 0, the X coordinate of an end point is 1, if A is 0.4, the X coordinate of the base point is 0.4), the Y coordinate of the base point is Y delta which is 2B times, B is smaller than 1 and larger than 0, Y delta is the Y coordinate of the midpoint of the projection line of the pre-forming curve on the Y axis, the pre-forming curve is integrally moved in the X-Y coordinate system, so that the base point is moved to an origin on the X-Y coordinate, and then the pre-forming curve is rotated around the base line by an angle C to form the projection curve;
the projection curve corresponding to the space distortion curve ring of the blade body positioned at the innermost side is called an inner shaping curve, and the front shaping curve corresponding to the inner shaping curve is called an inner front shaping curve;
the inner front forming curve is formed by connecting the following positioning points in sequence by using strip-shaped lines or straight lines:
the A of the inner pre-forming curve is 0.377, the B is 0.42, the C is 31-37 degrees, and the coordinate values of all positioning points of the inner pre-forming curve and the tolerance of A, B are within +/-5 percent;
the projection curve corresponding to the space distortion curve ring at the outermost side of the blade body is called an outer shaping curve, and the front shaping curve corresponding to the outer shaping curve is called an outer front shaping curve;
the outer front forming curve is formed by connecting the following positioning points in sequence by using strip-shaped lines or straight lines:
the A of the outer pre-forming curve is 0.377, the B is 0.42, the C is 7-13 degrees, and the coordinate values of all positioning points of the outer pre-forming curve and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the outer forming curve is located is an outer forming cylindrical surface, and the diameter of the outer forming cylindrical surface is D;
the forming cylindrical surface where the inner forming curve is located is an inner forming cylindrical surface, and the diameter of the inner forming cylindrical surface is 0.3 D+/-5%;
the projection curve corresponding to the space distortion curve ring of the blade body between the outer shaping curve and the inner shaping curve is called an intermediate shaping curve;
at least one middle forming curve is arranged between the outer forming curve and the inner forming curve, and the middle forming curve comprises any one or more or all of a second middle forming curve, a third middle forming curve, a fourth middle forming curve and a fifth middle forming curve from inside to outside;
the front forming curve corresponding to the middle forming curve is called a middle front forming curve, and the middle front forming curve is formed by sequentially connecting all positioning points on the middle front forming curve by using a strip line or a straight line according to sequence numbers;
the coordinates of the locating points corresponding to the second intermediate forming curve are as follows:
the corresponding A of the second intermediate forming curve is 0.377, B is 0.42, C is 30-36 degrees, and the coordinate values of all positioning points of the second intermediate forming curve and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the second middle forming curve is located is a second forming cylindrical surface, and the diameter of the second forming cylindrical surface is 0.45 D+/-5%;
the coordinates of the positioning points corresponding to the third intermediate forming curve are as follows:
the corresponding A of the third intermediate forming curve is 0.4, B is 0.423, C is 23-29 degrees, and the coordinate values of all positioning points of the third intermediate forming curve and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the third middle forming curve is located is a third forming cylindrical surface, and the diameter of the third forming cylindrical surface is 0.59 D+/-5%;
the coordinates of the positioning points corresponding to the fourth intermediate forming curve are as follows in sequence:
the corresponding A of the fourth intermediate forming curve is 0.427, the corresponding B of the fourth intermediate forming curve is 0.422, the corresponding C of the fourth intermediate forming curve is 17-23, and the coordinate values of all positioning points of the fourth intermediate forming curve and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the fourth middle forming curve is located is a fourth forming cylindrical surface, and the diameter of the fourth forming cylindrical surface is 0.72 D+/-5%;
the coordinates of the positioning points corresponding to the fifth intermediate forming curve are as follows in sequence:
the corresponding A of the fifth intermediate forming curve is 0.452, the corresponding B of the fifth intermediate forming curve is 0.42, the corresponding C of the fifth intermediate forming curve is 12-18 degrees, and the coordinate values of all positioning points of the fifth intermediate forming curve and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the fifth middle forming curve is located is a fifth forming cylindrical surface, and the diameter of the fifth forming cylindrical surface is 0.86 D+/-5%;
C>C>C>C>C>C；
the blade body is a solid body which is sequentially determined by a space distortion curve ring corresponding to an inner shaping curve, a space distortion curve ring corresponding to at least one middle shaping curve and a space distortion curve ring corresponding to an outer shaping curve. The application avoids the problems that the defective rate is low and the dimension detection cannot be performed because the blade shape of the blade body is determined empirically in the field by definitely defining and limiting the shape of the blade body in a three-dimensional space. The blade body of the application can provide high full-pressure air flow under the condition of low speed through computer simulation and a large number of experiments, and meanwhile, the efficiency of the axial flow fan using the application is very high. The application is used for the axial flow fan.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the application, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of a projection relationship according to an embodiment of the present application;
FIG. 2 is a right side view of an embodiment of the present application;
fig. 3 is a schematic diagram of a front view structure of an embodiment of the present application.
Detailed Description
The conception, specific structure, and technical effects produced by the present application will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present application. It is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present application based on the embodiments of the present application. In addition, all coupling/connection relationships mentioned herein do not refer to direct connection of the components, but rather, refer to the fact that a more optimal coupling structure may be formed by adding or subtracting coupling aids depending on the particular implementation. The technical features of the application can be interactively combined on the premise of no contradiction and conflict.
Referring to fig. 1 to 3, this is an embodiment of the present application, in particular:
an axial flow impeller comprises a base 2 with a rotating shaft 21, wherein a plurality of impeller bodies 1 are arranged on the base 2, the impeller bodies 1 are uniformly distributed around the rotating shaft 21 in a ring shape, the shape of each impeller body 1 is determined by at least three space twist curve rings which are arranged at intervals, a foundation line 1017 is arranged on each impeller body 1, the foundation line 1017 is mutually perpendicular to the rotating shaft 21, all the space twist curve rings are curves on a forming cylindrical surface, and the axis of the forming cylindrical surface coincides with the rotating shaft 21;
all the space distortion curve rings on each blade body 1 are provided with projection curves on a basic projection plane, the basic projection plane passes through the rotating shaft 21 and is perpendicular to the basic line 1017, an X-Y coordinate system is established on the basic projection plane, and the Y axis coincides with the rotating shaft 21;
the projection curve is formed by transforming a front forming curve on an X-Y coordinate system, and the origin of the X-Y coordinate system is arranged on a base line 1017;
front forming curve:
the method comprises the steps that a plurality of positioning points positioned on an X-Y coordinate system are sequentially connected by a strip-shaped line or a straight line to form a pre-formed curve, a base point is arranged in an area surrounded by the pre-formed curve, the X coordinate of the base point is X delta which is 2A times, A is smaller than 1 and is larger than 0, X delta is the X coordinate where the midpoint of a projection line of the pre-formed curve on the X axis is located, the Y coordinate of the base point is Y delta which is 2B times, B is smaller than 1 and is larger than 0, Y delta is the Y coordinate where the midpoint of the projection line of the pre-formed curve on the Y axis is located, the pre-formed curve is integrally moved in the X-Y coordinate system, the base point is moved to an original point on the X-Y coordinate, and then the pre-formed curve is rotated around the base line 1017 by an angle C, so that the projection curve is formed;
the projection curve corresponding to the space distortion curve ring of the blade body 1 located at the innermost side is called an inner shaping curve 1011, and the pre-shaping curve corresponding to the inner shaping curve 1011 is called an inner pre-shaping curve;
the inner front forming curve is formed by connecting the following positioning points in sequence by using strip-shaped lines or straight lines:
the A of the inner pre-forming curve is 0.377, the B is 0.42, the C is 31-37 degrees, and the coordinate values of all positioning points of the inner pre-forming curve and the tolerance of A, B are within +/-5 percent;
the projected curve corresponding to the space distortion curve ring of the blade body 1 located at the outermost side is referred to as an outer shaping curve 1016, and the pre-shaping curve corresponding to the outer shaping curve 1016 is referred to as an outer pre-shaping curve;
the outer front forming curve is formed by connecting the following positioning points in sequence by using strip-shaped lines or straight lines:
the A of the outer pre-forming curve is 0.377, the B is 0.42, the C is 7-13 degrees, and the coordinate values of all positioning points of the outer pre-forming curve and the tolerance of A, B are within +/-5 percent;
the shaped cylindrical surface on which the outer shaping curve 1016 is located is an outer shaped cylindrical surface 1026, and the diameter of the outer shaped cylindrical surface 1026 is D;
the forming cylindrical surface where the inner forming curve 1011 is located is an inner forming cylindrical surface 1021, and the diameter of the inner forming cylindrical surface 1021 is 0.3 D+/-5%;
the projected curve of the blade body 1 corresponding to the space twist curve loop between the outer shaping curve 1016 and the inner shaping curve 1011 is referred to as the intermediate shaping curve;
at least one intermediate forming curve is arranged between the outer forming curve 1016 and the inner forming curve 1011, and the intermediate forming curve comprises any one or more or all of a second intermediate forming curve 1012, a third intermediate forming curve 1013, a fourth intermediate forming curve 1014 and a fifth intermediate forming curve 1015 from inside to outside;
the front forming curve corresponding to the middle forming curve is called a middle front forming curve, and the middle front forming curve is formed by sequentially connecting all positioning points on the middle front forming curve by using a strip line or a straight line according to sequence numbers;
the coordinates of the positioning points corresponding to the second intermediate forming curve 1012 are in turn:
the corresponding A of the second intermediate forming curve 1012 is 0.377, B is 0.42, C is 30-36 degrees, and the coordinate values of all positioning points of the second intermediate forming curve 1012 and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the second middle forming curve 1012 is located is a second forming cylindrical surface 1022, and the diameter of the second forming cylindrical surface 1022 is 0.45d±5%;
the coordinates of the positioning points corresponding to the third intermediate forming curve 1013 are in turn:
the corresponding A of the third intermediate forming curve 1013 is 0.4, B is 0.423, C is 23-29 degrees, and the coordinate values of all positioning points of the third intermediate forming curve 1013 and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the third middle forming curve 1013 is located is a third forming cylindrical surface 1023, and the diameter of the third forming cylindrical surface 1023 is 0.59d±5%;
the coordinates of the positioning points corresponding to the fourth intermediate forming curve 1014 are in turn:
the corresponding A of the fourth intermediate forming curve 1014 is 0.427, B is 0.422, C is 17-23 degrees, and the coordinate values of all positioning points of the fourth intermediate forming curve 1014 and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the fourth middle forming curve 1014 is located is a fourth forming cylindrical surface 1024, and the diameter of the fourth forming cylindrical surface 1024 is 0.72d±5%;
the coordinates of the positioning points corresponding to the fifth intermediate forming curve 1015 are in turn:
the fifth intermediate forming curve 1015 corresponds to a value of 0.452, b of 0.42, c of 12 degrees to 18 degrees, and the coordinate values of each positioning point of the fifth intermediate forming curve 1015 and the tolerance of A, B are within + -5%;
the forming cylindrical surface where the fifth middle forming curve 1015 is located is a fifth forming cylindrical surface 1025, and the diameter of the fifth forming cylindrical surface 1025 is 0.86d±5%;
C>C>C>C>C>C；
the blade body 1 is a solid body in which a space twist curve ring corresponding to the inner shaping curve 1011, a space twist curve ring corresponding to at least one intermediate shaping curve, and a space twist curve ring corresponding to the outer shaping curve 1016 are sequentially determined. The application avoids the problems that the defective rate is low and the dimension detection cannot be performed because the blade shape of the blade body is determined empirically in the field by definitely defining and limiting the shape of the blade body in a three-dimensional space. The blade body of the application can provide high full-pressure air flow under the condition of low speed through computer simulation and a large number of experiments, and meanwhile, the efficiency of the axial flow fan using the application is very high.
Since the deformation of the existing blade body during operation has a great influence on performance, steel materials are often used for manufacturing the blade body, but the micro deformation of the blade body in the embodiment does not influence the full pressure and the efficiency during operation, and the blade body 1 in the embodiment is an aluminum member.
In order to reduce the noise, the front forming curve is formed by sequentially connecting a plurality of positioning points positioned on an X-Y coordinate system by using a strip-shaped line.
For a small axial flow fan, the fan blade body is very small, so that a front forming curve for the small axial flow fan can be formed by sequentially connecting a plurality of positioning points positioned on an X-Y coordinate system by using straight lines.
In order to reduce acoustic noise, the blade body 1 smoothly passes through the space twist curve ring corresponding to the middle forming curve from the space twist curve ring corresponding to the inner forming curve 1011 from inside to outside, and then smoothly transits to the space twist curve ring corresponding to the outer forming curve 1016.
The points on the space twist curve ring with the inner forming curve 1011 and the number j are the initial points of the guide lines, the points on the space twist curve ring with the number j of the middle forming curve are the middle points of the guide lines, and the points on the space twist curve ring with the number k of the outer forming curve 1016 are the end points of the guide lines. i=j=k, the guide line sequentially passes through the start point of the guide line, the middle point of the guide line and the end point of the guide line, the guide line is a strip-like line, the blade body 1 is guided by the guide line, and the space distortion curve ring corresponding to the inner shaping curve 1011 sequentially passes through the space distortion curve ring corresponding to the middle shaping curve smoothly from inside to outside, and then smoothly transits to the space distortion curve ring corresponding to the outer shaping curve 1016. For example, the positioning point with the sequence number 1 is used as a guide line, and the following coordinates are sequentially passed: (0.433,0), (0.415,0), (0.488,0), (0.498,0), (0.528,0), (0.53,0). Of course, the positioning points with the sequence numbers of 2 to 30 can be singly or entirely used as guide lines respectively.
In this embodiment, all the sequence number positioning points are defined by the guide lines, and are defined by the space twist curve links corresponding to the inner shaping curve 1011, the second intermediate shaping curve 1012, the third intermediate shaping curve 1013, the fourth intermediate shaping curve 1014, the fifth intermediate shaping curve 1015, and the outer shaping curve 1016. One unit of the X-axis and Y-axis of this embodiment represents 6mm.
Through testing, the measurement is carried out at different working condition points, and the specific data are as follows:
under the same condition, the data measurement is carried out on the existing fan blade, and the result is as follows:
from the comparison data, the impeller power, the volume flow and the full pressure of the impeller are greatly improved. Within a tolerance of + -5%, the performance variation of this embodiment is also within 3%. However, if the blade body has a blade shape error exceeding + -5%, the performance may fluctuate by more than 20%.
While the preferred embodiment of the present application has been described in detail, the present application is not limited to the embodiments described above, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present application, and these equivalent modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.
Claims (6)
1. The utility model provides an axial flow impeller, includes base (2) that have pivot (21), is equipped with a plurality of blade bodies (1) on base (2), blade body (1) are around pivot (21) annular equipartition sets up, its characterized in that: the shape of the blade body (1) is determined by at least three space twist curve rings which are arranged at intervals, a foundation line (1017) is arranged on the blade body (1), the foundation line (1017) is perpendicular to the rotating shaft (21), all the space twist curve rings are curves on a forming cylindrical surface, and the axis of the forming cylindrical surface coincides with the rotating shaft (21);
all the space distortion curve rings on each blade body (1) are provided with projection curves on a basic projection plane, the basic projection plane passes through a rotating shaft (21) and is perpendicular to a basic line (1017), an X-Y coordinate system is established on the basic projection plane, and a Y axis is coincident with the rotating shaft (21); the projection curve is formed by transforming a front forming curve on an X-Y coordinate system, and the origin of the X-Y coordinate system is arranged on a base line (1017);
front forming curve:
the method comprises the steps that a plurality of positioning points positioned on an X-Y coordinate system are sequentially connected by a strip-shaped line or a straight line to form a pre-formed curve, a base point is arranged in an area surrounded by the pre-formed curve, the X coordinate of the base point is X delta which is 2A times, A is smaller than 1 and larger than 0, X delta is the X coordinate where the midpoint of a projection line of the pre-formed curve on the X axis is located, the Y coordinate of the base point is Y delta which is 2B times, B is smaller than 1 and larger than 0, Y delta is the Y coordinate where the midpoint of the projection line of the pre-formed curve on the Y axis is located, the pre-formed curve is integrally moved in the X-Y coordinate system, the base point is moved to an original point on the X-Y coordinate, and then the pre-formed curve is rotated around the base line (1017) by an angle C, so that the projection curve is formed;
the projection curve corresponding to the space distortion curve ring of the blade body (1) positioned at the innermost side is called an inner shaping curve (1011), and the front shaping curve corresponding to the inner shaping curve (1011) is called an inner front shaping curve;
the inner front forming curve is formed by connecting the following positioning points in sequence by using strip-shaped lines or straight lines:
the A of the inner pre-forming curve is 0.377, the B is 0.42, the C is 31-37 degrees, and the coordinate values of all positioning points of the inner pre-forming curve and the tolerance of A, B are within +/-5 percent;
the projection curve corresponding to the space distortion curve ring of the blade body (1) positioned at the outermost side is called an outer shaping curve (1016), and the front shaping curve corresponding to the outer shaping curve (1016) is called an outer front shaping curve;
the outer front forming curve is formed by connecting the following positioning points in sequence by using strip-shaped lines or straight lines:
the A of the outer pre-forming curve is 0.377, the B is 0.42, the C is 7-13 degrees, and the coordinate values of all positioning points of the outer pre-forming curve and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the outer forming curve (1016) is located is an outer forming cylindrical surface (1026), and the diameter of the outer forming cylindrical surface (1026) is D;
the forming cylindrical surface where the inner forming curve (1011) is located is an inner forming cylindrical surface (1021), and the diameter of the inner forming cylindrical surface (1021) is 0.3 D+/-5%;
the projected curve of the blade body (1) corresponding to the space twist curve loop between the outer shaping curve (1016) and the inner shaping curve (1011) is called an intermediate shaping curve;
at least one intermediate forming curve is arranged between the outer forming curve (1016) and the inner forming curve (1011), and the intermediate forming curve comprises any one or more or all of a second intermediate forming curve (1012), a third intermediate forming curve (1013), a fourth intermediate forming curve (1014) and a fifth intermediate forming curve (1015) from inside to outside;
the front forming curve corresponding to the middle forming curve is called a middle front forming curve, and the middle front forming curve is formed by sequentially connecting all positioning points on the middle front forming curve by using a strip line or a straight line according to sequence numbers;
coordinates of positioning points corresponding to the second intermediate forming curve (1012) are as follows:
the corresponding A of the second intermediate forming curve (1012) is 0.377, the corresponding B is 0.42, the corresponding C is 30-36 degrees, and the coordinate values of all positioning points of the second intermediate forming curve (1012) and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the second middle forming curve (1012) is located is a second forming cylindrical surface (1022), and the diameter of the second forming cylindrical surface (1022) is 0.45 D+/-5%;
the coordinates of the positioning points corresponding to the third intermediate forming curve (1013) are as follows:
the corresponding A of the third intermediate forming curve (1013) is 0.4, the corresponding B is 0.423, the corresponding C is 23-29 degrees, and the coordinate values of all positioning points of the third intermediate forming curve (1013) and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the third middle forming curve (1013) is located is a third forming cylindrical surface (1023), and the diameter of the third forming cylindrical surface (1023) is 0.59 D+/-5%;
the coordinates of the locating points corresponding to the fourth intermediate forming curve (1014) are as follows:
the corresponding A of the fourth intermediate forming curve (1014) is 0.427, the corresponding B of the fourth intermediate forming curve is 0.422, the corresponding C of the fourth intermediate forming curve is 17-23 degrees, and the coordinate values of all positioning points of the fourth intermediate forming curve (1014) and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the fourth middle forming curve (1014) is located is a fourth forming cylindrical surface (1024), and the diameter of the fourth forming cylindrical surface (1024) is 0.72 D+/-5%;
the coordinates of the positioning points corresponding to the fifth intermediate forming curve (1015) are sequentially as follows:
the corresponding A of the fifth intermediate forming curve (1015) is 0.452, the corresponding B of the fifth intermediate forming curve is 0.42, the corresponding C of the fifth intermediate forming curve is 12-18 degrees, and the coordinate values of all positioning points of the fifth intermediate forming curve (1015) and the tolerance of A, B are within +/-5 percent;
the forming cylindrical surface where the fifth middle forming curve (1015) is located is a fifth forming cylindrical surface (1025), and the diameter of the fifth forming cylindrical surface (1025) is 0.86 D+/-5%;
C>C>C>C>C>C；
the blade body (1) is a solid body in which a space twist curve ring corresponding to an inner shaping curve (1011), a space twist curve ring corresponding to at least one intermediate shaping curve, and a space twist curve ring corresponding to an outer shaping curve (1016) are sequentially determined.
2. An axial flow impeller according to claim 1, wherein: the blade body (1) is an aluminum member.
3. An axial flow impeller according to claim 1, wherein: the preposed forming curve is formed by sequentially connecting a plurality of positioning points positioned on an X-Y coordinate system by using a strip-shaped line.
4. An axial flow impeller according to claim 1, wherein: the front forming curve is formed by sequentially connecting a plurality of positioning points positioned on an X-Y coordinate system by using straight lines.
5. An axial flow impeller according to claim 1, wherein: the blade body (1) smoothly passes through the space distortion curve ring corresponding to the middle forming curve from the space distortion curve ring corresponding to the inner forming curve (1011) and then smoothly transits to the space distortion curve ring corresponding to the outer forming curve (1016) from inside to outside.
6. An axial flow impeller according to claim 1, wherein: the points on the space twist curve ring with the inner shaping curve (1011) number i being in projection relation are the starting points of the guide lines, the points on the space twist curve ring with the intermediate shaping curve number j being in projection relation are the middle points of the guide lines, and the points on the space twist curve ring with the outer shaping curve (1016) number k being in projection relation are the end points of the guide lines; i=j=k, the guide line sequentially passes through the initial point of the guide line, the middle point of the guide line and the end point of the guide line, the guide line is a strip-like line, the blade body (1) is guided by the guide line, and the space twist curve ring corresponding to the inner shaping curve (1011) sequentially passes through the space twist curve ring corresponding to the middle shaping curve smoothly from inside to outside, and then smoothly transits to the space twist curve ring corresponding to the outer shaping curve (1016).
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| CN201711104840.2A CN107917102A (en) | 2017-11-10 | 2017-11-10 | A kind of axial wheel |
| CN2017111048402 | 2017-11-10 |
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|---|---|---|---|---|
| EP0174487A1 (en) * | 1984-08-16 | 1986-03-19 | Siemens Aktiengesellschaft | Axial ventilator |
| CN1421615A (en) * | 2001-11-27 | 2003-06-04 | 北京森博苑科技有限公司 | Axial flow fan vane wheel with forward bent and twisted contour |
| CN102828996A (en) * | 2011-06-14 | 2012-12-19 | 珠海格力电器股份有限公司 | Axial fan |
| CN103511339A (en) * | 2012-06-29 | 2014-01-15 | 珠海格力电器股份有限公司 | Air conditioner, axial flow fan and axial propeller of axial flow fan |
| CN106351878A (en) * | 2016-09-28 | 2017-01-25 | 华中科技大学 | Axial-flow swept blade |
| CN106939902A (en) * | 2017-04-06 | 2017-07-11 | 王尚锦 | The energy-saving forward and backward disk variable curvature curve element 3 d impeller of straight wall and the centrifugal fan using the impeller |
| CN208702772U (en) * | 2017-11-10 | 2019-04-05 | 佛山市南海九洲普惠风机有限公司 | A kind of axial wheel |
-
2017
- 2017-11-10 CN CN201711104840.2A patent/CN107917102A/en active Pending
-
2018
- 2018-04-28 CN CN201810400885.2A patent/CN108547793B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0174487A1 (en) * | 1984-08-16 | 1986-03-19 | Siemens Aktiengesellschaft | Axial ventilator |
| CN1421615A (en) * | 2001-11-27 | 2003-06-04 | 北京森博苑科技有限公司 | Axial flow fan vane wheel with forward bent and twisted contour |
| CN102828996A (en) * | 2011-06-14 | 2012-12-19 | 珠海格力电器股份有限公司 | Axial fan |
| CN103511339A (en) * | 2012-06-29 | 2014-01-15 | 珠海格力电器股份有限公司 | Air conditioner, axial flow fan and axial propeller of axial flow fan |
| CN106351878A (en) * | 2016-09-28 | 2017-01-25 | 华中科技大学 | Axial-flow swept blade |
| CN106939902A (en) * | 2017-04-06 | 2017-07-11 | 王尚锦 | The energy-saving forward and backward disk variable curvature curve element 3 d impeller of straight wall and the centrifugal fan using the impeller |
| CN208702772U (en) * | 2017-11-10 | 2019-04-05 | 佛山市南海九洲普惠风机有限公司 | A kind of axial wheel |
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| CN107917102A (en) | 2018-04-17 |
| CN108547793A (en) | 2018-09-18 |
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