CN216642559U

CN216642559U - Fan blade capable of optimizing performance of fan

Info

Publication number: CN216642559U
Application number: CN202220094481.7U
Authority: CN
Inventors: 袁鹏程; 刘伟; 竺春辉
Original assignee: Zhejiang Kemao Industrial Co ltd
Current assignee: Zhejiang Kemao Industrial Co ltd
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-05-31
Anticipated expiration: 2032-01-14

Abstract

The utility model discloses a fan blade capable of optimizing fan performance, which is used for being connected with a power supply device to form a fan and comprises a blades and a blade core, wherein the blades are annularly arranged on the blade core, the upper edge of the blades extends upwards to form a heightened edge, the blades extend towards the assembling direction of the fan blade to form a boss structure, a height difference is formed between the intersection points of the boss structure, the height of the intersection point close to the upper edge is larger than the height of the intersection point far away from the upper edge, the pressure is balanced, the airflow between the blade edge and an air duct is reduced to a certain extent, the aerodynamic noise is effectively reduced, and the efficiency is improved.

Description

Fan blade capable of optimizing performance of fan

Technical Field

The utility model relates to the field of fan components, in particular to a fan blade capable of optimizing fan performance.

Background

The fan plays a key role in ventilation. The types of the fans are various, and there are small and medium fans with simple manufacturing process and large fans with complex manufacturing process. For small and medium-sized fans with large use amount and wide application range, the product structure and the manufacturing process are simpler, the cost is lower, and users mainly pursue high efficiency, low noise and long service life; the other type is capital and technology intensive, the product structure is complex, the manufacturing period is long, the complete set and the systematicness are strong, the fan runs under the conditions of high pressure, high temperature and high speed, and some fans run even under the severe working conditions, so that users have different requirements on the fans. For turbo blowers and compressors and large ventilators, users mainly pursue high quality, high reliability, smooth operation and long cycle, and although different fans have different performances, the fans are closely related to fan impellers.

The fan impeller is a core component of the fan, and the design quality of the impeller is directly related to the performance and efficiency of the fan. Along with the development of the fan industry, the performance of the fan is better and better, the efficiency is higher and higher, and the improvement of the performance of the existing fan is of great importance in order to deal with the current market developing at a high speed. The curved surface of the blade of the fan blade is a very critical part in the design of the fan, the curved surface determines various performances of the fan, such as noise, air volume, vibration and the like, and the traditional curved surface of the fan blade can not meet the requirements of the fan blade in terms of noise, air volume and vibration.

In short, the conventional fan impeller has relatively poor waterproof performance, water passing performance and pneumatic noise in high-speed rotation, relatively small air volume and relatively large vibration.

SUMMERY OF THE UTILITY MODEL

Based on the problems of relatively poor waterproof performance, water-passing performance and pneumatic noise in high-speed rotation, relatively small air volume and relatively large vibration of the existing fan impeller, and in order to solve the problems of relatively poor waterproof performance, water-passing performance and pneumatic noise in high-speed rotation, relatively small air volume and relatively large vibration of the existing fan impeller, the utility model provides the fan blade capable of optimizing the fan performance, so that the technical problems of relatively poor waterproof performance, water-passing performance and pneumatic noise in high-speed rotation, relatively small air volume and relatively large vibration of the existing fan impeller are provided as follows:

the utility model provides a fan blade capable of optimizing fan performance, which is used for being connected with a power supply device to form a fan and comprises a blades and a blade core, wherein the blades are annularly arranged on the blade core, the upper edge of each blade extends upwards to form a heightened edge, the blades extend towards the assembly direction of the fan blade to form a boss structure, a height difference is formed between the intersection points of the boss structures, and the height of the intersection point close to the upper edge is greater than the height of the intersection point far away from the upper edge.

Further, the thickness of the boss structure is 1.0-2.5 mm, and the thickness of the boss is 0.5% -1% of the diameter of the blade.

Furthermore, the elevation angle range value corresponding to the intersection point of the boss structure close to the upper edge is 15-44 degrees, and the elevation angle range value corresponding to the intersection point of the boss structure far away from the upper edge is 45-89 degrees.

Further, the blade core comprises an axial end part, and the end face of the axial end part adopts an evanescent transition structure.

Furthermore, the end face is of a circular truncated cone structure, and the edge of the circular truncated cone is of a wave shape.

Further, the blade core includes connecting portion, connecting portion with stupefied platform structure has between the blade, power supply unit includes guide bracket, when connecting portion with when guide bracket connects, stupefied platform structure is used for cooperating guide bracket forms the waterproof structure of maze.

Furthermore, n blind holes or through holes are formed in the axial end portion.

Further, when the blade is horizontally placed, a circular curved surface with the diameter of 95-225 mm is stretched, and the circular curved surface is intersected with the blade curved surface to form a blade modeling curve.

Further, when the blade is horizontally placed, circular curved surfaces with the stretching diameters of 95mm, 120mm, 155mm, 190mm and 225mm are respectively stretched, the circular curved surfaces are intersected with the blade curve to form a blade modeling curve, and the corresponding linear elevation angles are respectively 42 degrees, 40 degrees, 37 degrees, 32 degrees and 29 degrees.

Another preferred embodiment of the present invention provides a fan blade capable of optimizing fan performance, wherein when the fan blade is horizontally placed, a circular curved surface with a diameter of 95mm to 225mm is stretched, and the circular curved surface intersects with the curved surface of the fan blade to form a fan blade modeling curve.

The fan blade capable of optimizing the fan performance has the advantages that the curved surface of the fan blade is optimized, so that the vibration is obviously reduced, the air volume is obviously improved, and the noise is reduced.

The fan blade capable of optimizing the performance of the fan has the advantage that a gradually-eliminated transition structure is adopted, so that noise is reduced.

The fan blade capable of optimizing the performance of the fan has the advantage that the fan blade adopts a gradually-eliminated transition structure, so that the attractiveness is improved.

The fan blade capable of optimizing the performance of the fan has the advantages that the edge of the fan blade is heightened, so that vibration is reduced, noise is reduced, and energy efficiency is improved.

The fan blade capable of optimizing the performance of the fan has the advantage that due to the design of the water dripping holes, water is drained conveniently.

The fan blade capable of optimizing the performance of the fan has the advantage that the design of the water dripping holes is convenient for outdoor use.

The fan blade capable of optimizing the performance of the fan has the advantage that the waterproof grade is improved due to the design of the frustum structure.

The fan blade capable of optimizing the performance of the fan has the advantage that the design of the corrugated platform structure enables the fan blade to be matched with the power supply device to form a labyrinth waterproof structure.

The fan blade capable of optimizing the performance of the fan has the advantage that the overall stability is improved.

The fan blade capable of optimizing the performance of the fan has the advantage that the service life of the fan blade is obviously prolonged.

Drawings

FIG. 1 is a schematic overall structure of an embodiment of the present invention;

FIG. 2 is a schematic structural view of a boss structure of an embodiment of the present invention;

FIG. 3 is a schematic view of the overall structure inside the outer contour of the blade core of the embodiment of the present invention;

FIG. 4 is a schematic view of a blind hole configuration at an axial end of an embodiment of the present invention;

FIG. 5 is a schematic view of a raised edge magnification configuration of an embodiment of the present invention;

FIG. 6 is a schematic view of an optimized camber of a blade according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a castellation line formed by the intersection of the blade camber with the circular camber of ∅ 95 according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a castellation line formed by the intersection of the blade camber with the circular camber of ∅ 120 according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of a castellation line formed by the intersection of the blade camber with the circular camber of ∅ 155, according to an embodiment of the present invention;

FIG. 10 is a schematic structural view of a castellation line formed by the intersection of the blade camber with the circular camber of ∅ 190 according to an embodiment of the present invention;

FIG. 11 is a schematic structural view of a castellation line formed by the intersection of the blade camber with the circular camber of ∅ 225, according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of the structure of the castellations formed by the intersection of each diameter circular camber with the blade according to an embodiment of the utility model;

FIG. 13 is a simplified schematic of a boss configuration of an embodiment of the present invention.

In the figure: the blade-1, the blade core-2, the axial end-21, the blind hole-211, the connecting part-22, the frustum structure-23, the heightened edge-3 and the boss structure-4.

Detailed Description

The utility model is further described below in conjunction with fig. 1-13 and the detailed description.

The following description is presented to disclose the utility model so as to enable any person skilled in the art to practice the utility model. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the utility model, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

The utility model provides a fan blade capable of optimizing fan performance, which is used for being connected with a power supply device to form a fan and comprises a blades 1 and a blade core 2, wherein the blades 1 are annularly arranged on the blade core 2, the upper edge of each blade 1 extends upwards to form a heightened edge 3, the blades 1 extend towards the assembling direction of the fan blade to form a boss structure 4, a height difference is formed between the intersection points of the boss structures 4, and the height of the intersection point close to the upper edge is greater than the height of the intersection point far away from the upper edge.

The design of the heightened edge 3 can obviously reduce the noise generated by the blade 1 in the operation process and optimize the performance of the fan.

The design of the boss structure 4 can make the center of gravity move outwards in the operation process of the blade 1, keep the overall balance of the blade, and reduce the operation vibration of the blade 1, meanwhile, in the working process of the fan, because the pressure of the front and the back of the blade 1 is different, the front and the back of the blade 1 can generate air flow through the gap between the outer side of the blade and the air duct, and the existence of the heightened edge 3 can reduce the air flow between the edge of the blade and the air duct to a certain extent, effectively reduce the aerodynamic noise, and improve the energy efficiency. It should be noted that the power supply device includes an air duct and a current guiding portion, the air duct and the current guiding portion are of an integrated structure, and the air duct is also called an air guide support, that is, the air guide support and the current guiding portion are of an integrated structure, the current guiding portion includes a circuit board and a bearing, the blade core 2 includes a motor core, a magnetic stripe and a rotating shaft, the rotating shaft is contained in the bearing, the two are matched with each other, and the matching arrangement of the motor core, the magnetic stripe and the circuit board is a combined motor in an axial flow fan structure, that is, an outer rotor motor, which is common in the market. The wind guide support is connected with the fan blade after being formed, the connection mode includes but is not limited to screw connection, namely, internal threads are matched and connected with external threads, and a complete fan structure is assembled after an end cover and a mesh enclosure are installed.

Furthermore, the thickness of the boss structure 4 is 1.0-2.5 mm, and the thickness of the boss is 0.5% -1% of the diameter of the blade 1, so that pressure balance is facilitated, and noise is reduced. Specifically, the thickness of the boss structure 4 = (0.5% to 1%) + D.

Furthermore, the elevation angle range value corresponding to the intersection point of the boss structure 4 close to the upper edge is 15-44 degrees, the elevation angle range value corresponding to the intersection point of the boss structure 4 far away from the upper edge is 45-89 degrees, the whole body is in a shuttle shape with a narrow front, a wide middle and a narrow back, and the elevation angle range is 15-45 degrees.

Specifically, in a preferred embodiment of the present invention, the elevation angle corresponding to the intersection point of the boss structure 4 near the upper edge is 22 °, the elevation angle corresponding to the intersection point of the boss structure 4 far from the upper edge is 57 °, and the overall elevation angle is 30 °. The length corresponding to the intersection point of the boss structure 4 far away from the upper edge is L1, and the length of the whole boss structure 4 is L, i 1= (2/3-7/8) × L.

Further, the blade core 2 comprises an axial end part 21, and the end surface of the axial end part 21 adopts an evanescent transition structure. It is worth mentioning that the gradually-eliminated transition structure is provided with a plurality of concave-convex surfaces, so that the gas viscosity of air can be effectively reduced, and the aerodynamic noise of the fan blade in high-speed rotation is reduced.

Furthermore, the end face is of a circular truncated cone structure, and the edge of the circular truncated cone is of a wave shape. It is worth mentioning that the end face comprises but is not limited to a circular truncated cone structure, the edge of the circular truncated cone is not limited to a wave shape, and the structural design can effectively reduce the gas viscosity of air and reduce the pneumatic noise of the fan blade in high-speed rotation on one hand; on the other hand, the integral structure is more beautiful. It is worth mentioning that the outer edge of the circular truncated cone structure conforms to the height y = A + B sin (n 360 trajpar), A is the base height, B is the amplitude, n is the cycle period, and trajpar refers to the value of the system variable of 0-1.

Further, the blade core includes connecting portion, connecting portion with stupefied platform structure has between the blade, power supply unit includes guide bracket, when connecting portion with when guide bracket connects, stupefied platform structure is used for cooperating guide bracket forms the waterproof structure of maze. It is worth noting that power supply unit includes guide bracket and electric current guide part, guide bracket holds electric current guide part, stupefied structural waterproof construction of seting up, including but not limited to the guide slot, guide bracket outward flange extend with the gomphosis structure of waterproof groove looks adaptation, gomphosis groove and gomphosis are protruding stupefied promptly, form labyrinth waterproof construction, be favorable to preventing inside water entering fan blade, improve the grade that drains of fan.

Further, the axial end 21 is opened with n blind holes 211 or through holes, n =1, 2,3,4,5,6 … …. Specifically, the blind hole 211, also called a weep hole, is not penetrated during the manufacturing process, a plastic material is used between the bottom end surface and the axial end surface of the blind hole 211, and the thickness range of the part of the blind hole 211 which is not penetrated is 0.3 mm-2 mm, but is not limited to this size range. The preferred embodiment of the utility model herein is 0.3mm, 0.5mm thick, and manual breakdown is sufficient if desired. When the fan hangs upside down and is using outdoors, punctures blind hole 211 in advance, can effectively avoid 2 inside pondings of leaf core to prevent that whole fan is inside to intake, influence the normal use of fan, when using under indoor or the possible environment of no ponding, the fan blade normal use can.

The noise vibration is obviously reduced by the aid of wave modeling, the edge heightening design of the blade 1, and the blind holes 211 and the through holes; the performance was significantly improved as shown in the following table.

Further, when the blade 1 is horizontally placed, a circular curved surface with the diameter of 95-225 mm is stretched, and the circular curved surface is intersected with the curved surface of the blade 1 to form a modeling curve of the blade 1.

Further, when the blade 1 is horizontally placed, circular curved surfaces with the stretching diameters of 95mm, 120mm, 155mm, 190mm and 225mm are respectively stretched, the circular curved surfaces intersect with the blade 1 curve to form a blade 1 modeling curve, and the corresponding straight line elevation angles are respectively 42 degrees, 40 degrees, 37 degrees, 32 degrees and 29 degrees. Specifically, after the fan blades are horizontally placed, the circular curved surfaces with the stretching diameters of 95, 120, 155, 190 and 225 are intersected with the fan blade curved surfaces to form five fan blade modeling curves. An A plane with the axis formed by intersecting the X, Y planes as the rotation center and the angle of 10 degrees with the Y plane and a front A plane (the included angle between the sight line and the Y plane is 80 degrees) are established, and five modeling curves are viewed with the A plane as the visual angle, as shown in a schematic diagram.

In a preferred embodiment of the utility model, the elevation angle of a straight line connecting the end and the tail of a modeling line formed by the intersection of the curved surface of the blade 1 and the circular curved surface of ∅ 95 is 42 degrees.

Another preferred embodiment of the present invention is that the elevation angle of the straight line connecting the ends of the molding line formed by the intersection of the curved surface of the blade 1 and the circular curved surface of ∅ 120 is 40 degrees.

Another preferred embodiment of the present invention is that the elevation angle of the straight line connecting the ends of the molding line formed by the intersection of the curved surface of the blade 1 and the circular curved surface of ∅ 155 is 37 degrees.

Another preferred embodiment of the present invention is that the elevation angle of the straight line connecting the ends and the ends of the molding line formed by the intersection of the curved surface of the blade 1 and the circular curved surface of ∅ 190 is 32 degrees.

Another preferred embodiment of the present invention is that the elevation angle of the straight line connecting the ends of the molding line formed by the intersection of the curved surface of the blade 1 and the circular curved surface of ∅ 225 is 29 degrees.

It should be noted that, in the molding lines formed by intersecting the circular curved surfaces with different diameters with the blade 1, the lower left corner of different molding lines is hooked together to form the front edge of the blade 1, and the upper right corner of different molding lines is hooked together to form the rear edge of the blade 1, as shown in fig. 12.

Another preferred embodiment of the utility model provides a fan blade capable of optimizing fan performance, when the blade 1 is horizontally placed, a circular curved surface with the diameter of 95-225 mm is stretched, and the circular curved surface is intersected with the curved surface of the blade 1 to form a modeling curve of the blade 1.

Optimize 1 curved surface of blade, as shown in the table, compare 1 curved surface of traditional blade, its noise and vibration all improve, and the noise reduces:

it will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are given by way of example only and are not limiting of the utility model. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and the embodiments of the present invention may be modified or adapted in any manner.

It can thus be seen that the objects of the utility model are sufficiently well-attained. The embodiment illustrated and described herein is to be considered as illustrative of the functional and structural principles of the present invention and changes may be made without departing from such principles. Accordingly, this invention includes all modifications encompassed within the scope and spirit of the following claims.

Claims

1. The utility model provides a can optimize fan blade of fan performance for be connected with power supply unit and form the fan, its characterized in that, including a blade (1) and leaf core (2), a blade (1) hoop sets up in leaf core (2), the blade upper edge upwards extends to form and increases edge (3), just blade (1) extends to the fan blade assembly direction and forms boss structure (4), form the difference in height between the nodical of boss structure (4), the nodical height that is close the upper edge is greater than the height of keeping away from the nodical of upper edge.

2. The fan blade capable of optimizing fan performance according to claim 1, wherein the thickness of the boss structure (4) is 1.0-2.5 mm, and the thickness of the boss structure (4) is 0.5% -1% of the diameter of the fan blade (1).

3. The fan blade capable of optimizing the fan performance according to claim 1 or 2, wherein the elevation angle range value corresponding to the intersection point of the boss structure (4) close to the upper edge is 15-44 °, and the elevation angle range value corresponding to the intersection point of the boss structure (4) far away from the upper edge is 45-89 °.

4. The fan blade capable of optimizing the performance of the fan as claimed in claim 1, wherein the blade core (2) comprises an axial end portion (21), and an end face of the axial end portion (21) adopts a fading transition structure.

5. The fan blade capable of optimizing fan performance according to claim 4, wherein the end face is of a circular truncated cone structure, and the edge of the circular truncated cone is wave-shaped.

6. The fan blade capable of optimizing fan performance according to claim 1 or 4, wherein the blade core (2) comprises a connecting part (22), a ridge structure (23) is arranged between the connecting part (22) and the fan blade (1), the power supply device comprises a guide bracket, and when the connecting part (22) is connected with the guide bracket, the ridge structure (23) is used for matching with the guide bracket to form a labyrinth waterproof structure.

7. The fan blade capable of optimizing fan performance according to claim 4, wherein n blind holes (211) or through holes are formed in the axial end portion (21).

8. The fan blade capable of optimizing the fan performance according to claim 1, wherein when the fan blade (1) is horizontally placed, a circular curved surface with the diameter of 95mm to 225mm is stretched, and the circular curved surface intersects with the curved surface of the fan blade (1) to form a modeling curve of the fan blade (1).

9. The fan blade capable of optimizing the fan performance according to claim 8, wherein when the blade (1) is placed horizontally, the circular curved surfaces with the stretching diameters of 95mm, 120mm, 155mm, 190mm and 225mm are respectively intersected with the curve of the blade (1) to form a shaping curve of the blade (1), and the corresponding linear elevation angles are respectively 42 °, 40 °, 37 °, 32 ° and 29 °.

10. The fan blade capable of optimizing the performance of the fan is characterized in that when the fan blade (1) is horizontally placed, a circular curved surface with the diameter of 95-225 mm is stretched, and the circular curved surface is intersected with the curved surface of the fan blade (1) to form a molding curve of the fan blade (1).