Novel high-speed motor fan

Abstract

The utility model relates to the technical field of motors, in particular to a novel high-speed motor fan which comprises a central shaft portion, a hub connected to the central shaft portion and a plurality of fan blades arranged on the periphery of the hub, each fan blade is provided with a sickle-shaped overall outline, the front edge and the tail edge of each fan blade and the connecting line of the centers of the sections of the fan blades are in an arc shape, and the fan blades are arranged on the central shaft portion. According to the utility model, through the sickle-shaped overall profile of the fan blades, the fan blades can better capture and guide airflow during rotation, airflow turbulence and loss are reduced, the efficiency and the rotating speed of the fan are improved, friction and resistance between the airflow and the fan blades are reduced through the front edge arc line, and the airflow can pass through more smoothly; the tail edge arc line reduces vortex generation and improves airflow stability and efficiency, the section center connecting line is an arc line, the fan blades can better adapt to the airflow flowing direction when rotating, the airflow separation and stall phenomena are reduced, and the fan performance is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, especially a kind of novel high-speed motor fan. BACKGROUND

[0002] In the current heat dissipation technical field, high-speed motor fan as key heat dissipation component is widely used in server, data center, industrial equipment and other high heat generation occasions. With the performance of modern electronic equipment is continuously promoted, its heat generation also increases, and the requirement to heat dissipation system is also higher and higher. Although traditional high-speed motor fan can meet the heat dissipation demand to some extent, it still has many deficiencies in efficiency, noise control and energy consumption.

[0003] Firstly, the fan blade design of traditional high-speed motor fan is often relatively simple, lacks optimization for fluid dynamics. This leads to fluid resistance in the running process of fan, energy loss is serious, and further affects the heat dissipation efficiency and energy consumption performance of fan. At the same time, due to the uneven flow of fluid on the surface of fan blade, it is also easy to produce larger noise.

[0004] Secondly, the fan blade material and manufacturing process of traditional high-speed motor fan also limit the performance improvement. Some low-quality fan blade materials not only lack strength, are easy to deform or damage at high speed, but also cannot withstand higher temperature, thereby limiting the use environment of fan. In addition, the rough manufacturing process also causes the surface of fan blade to be uneven, increases fluid resistance, and reduces fan performance.

[0005] Therefore, a kind of novel high-speed motor fan is developed in the present application to solve the problems existing in the prior art. INVENTION CONTENTS

[0006] The utility model aims at providing a kind of novel high-speed motor fan to solve the problem of insufficient fan air intake in prior art.

[0007] The technical scheme of the utility model is: a kind of novel high-speed motor fan, comprising: center shaft part, the hub connected to the center shaft part and the plurality of fan blades being provided in the outer periphery of the hub, wherein the fan blade has the overall profile of sickle type, and the leading edge and trailing edge of the fan blade, and the center connecting line of the cross section of the fan blade all present as arc line shape.

[0008] Preferably, the proportion relationship between the diameter D1 of the hub and the diameter D2 of the outermost edge of fan blade, i.e. hub ratio Z=D1 / D2, and the range of hub ratio is 0.3≤Z≤0.5, to optimize the flow wind volume and improve the working efficiency of fan blade.

[0009] Preferably, the whole fan blade is in a twisted structure, and when the fan blade is projected along the radial direction, the projection of the top of the fan blade intersects with the projection of the root of the fan blade.

[0010] Preferably, the cross section of the fan blade is designed as an airfoil section, and the airfoil curvature gradually decreases from the root to the top of the fan blade, in particular, the airfoil curvature of the root section of the fan blade is A1, the airfoil curvature of the middle section of the fan blade is A2, the airfoil curvature of the top section of the fan blade is A3, and A1>A2>A3.

[0011] Preferably, the cross section airfoil installation angle γ of the fan blade gradually decreases from the root to the top, and the difference between adjacent two cross section airfoil installation angles γ is in an exponential function relationship.

[0012] Preferably, the cross section airfoil chord length of the fan blade gradually increases from the root to the top of the fan blade.

[0013] Preferably, the angle between the curve formed by the chord line midpoints of each airfoil section of the fan blade and the vertical line is α, i.e. the front bending angle, and the front bending angle is 10°≤α≤45°.

[0014] Preferably, the angle between the curve formed by the chord line midpoints of each airfoil section of the fan blade and the vertical line is β, i.e. the front sweep angle, and the front sweep angle is 0°<β≤30°.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] (1) The overall profile of the fan blade is in a sickle shape, so that the fan blade can better capture and guide the airflow when rotating, reduce airflow turbulence and loss, improve fan efficiency and rotating speed, the front edge arc line reduces the friction and resistance between the airflow and the fan blade, and the airflow passes more smoothly, the tail edge arc line reduces vortex generation, improves airflow stability and efficiency, the center connecting line of the cross section is an arc line, so that the fan blade can better adapt to the airflow flow direction when rotating, reduce airflow separation and stall phenomenon, and further improve fan performance.

[0017] (2) The airfoil curvature of the fan blade gradually decreases from the root to the top, which helps to reduce airflow separation and vortex on the surface of the fan blade, improve airflow stability and efficiency, the cross section airfoil installation angle γ gradually decreases from the root to the top, and the difference between adjacent two cross section airfoil installation angles γ is in an exponential function relationship, which optimizes the airflow flow state, reduces resistance and turbulence, improves fan efficiency, the cross section airfoil chord length gradually increases from the root to the top, increases the lift of the fan blade, and improves the thrust performance of the fan.

[0018] (3) The twisted design of the fan blade makes the fan blade have a suitable angle of attack at different radial positions, so that the airflow is more evenly distributed on the fan blade, reduces airflow separation, improves airflow adhesion capacity, and more effectively pushes the airflow. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further described below in combination with the drawings and embodiments:

[0020] Figure 1 It is the structure schematic diagram of novel high-speed motor fan of the utility model;

[0021] Figure 2 It is the plan view of novel high-speed motor fan of the utility model;

[0022] Figure 3 It is the side view of novel high-speed motor fan of the utility model;

[0023] Figure 4 It is the cross section airfoil installation angle change in the process from the root to the top of the fan blade of the utility model;

[0024] Figure 5 It is the simulation diagram of the cross section airfoil camber of the fan blade of the utility model;

[0025] Figure 6 It is the schematic diagram of the cross section airfoil camber of the fan blade of the utility model at different positions;

[0026] Figure 7 It is the schematic diagram of the front bending angle and the front sweep angle of the utility model.

[0027] Wherein: 1, center shaft part;2, wheel hub;3, fan blade;4, trailing edge;5, leading edge. DETAILED DESCRIPTION

[0028] The content of the utility model will be further described in detail below in combination with specific embodiments:

[0029] As Figures 1-3As shown, a new high-speed motor fan, comprising a central shaft part 1, a hub 2 connected to the central shaft part 1 and a plurality of fan blades 3 arranged on the outer periphery of the hub 2, wherein the central shaft part 1 is the core component of the fan, responsible for supporting the entire fan structure and transmitting power, the central shaft part 1 is connected to the motor, and the rotation is realized through the driving of the motor, so as to drive the hub 2 and the fan blade 3 to rotate together to generate airflow, and the fan blade 3 adopts the overall profile of a sickle, so that the fan blade 3 can better capture and guide the airflow when rotating, reduce the turbulence and loss of airflow, and thus improve the efficiency and speed of the fan, specifically, the leading edge 5 and the trailing edge 4 of the fan blade 3, and the center connecting line of the cross section of the fan blade 3 are in arc shape, the arc design of the leading edge 5 helps to reduce the friction and resistance between the airflow and the fan blade 3, so that the airflow passes through the fan blade 3 more smoothly; the arc design of the trailing edge 4 helps to reduce the generation of vortex and improve the stability and efficiency of the airflow, and the center connecting line of the cross section of the fan blade 3 is in arc shape, so that the fan blade 3 can better adapt to the flow direction of the airflow when rotating, reduce the separation and stall phenomenon of the airflow, and thus further improve the performance of the fan.

[0030] In this embodiment, in order to optimize the airflow and improve the work efficiency of the fan blade 3, the ratio between the diameter D1 of the hub 2 and the diameter D2 of the outermost edge of the fan blade 3, i.e. the hub ratio Z=D1 / D2, the range of the hub ratio Z is 0.3≤Z≤0.5, when Z<0.3, the diameter of the hub 2 is relatively small, although it can increase the airflow, but the strength and stability of the fan blade 3 may be affected, resulting in unnecessary vibration and noise during rotation, and even may reduce the service life of the fan; when Z>0.5, the diameter of the hub 2 is relatively large, which will occupy too much space and limit the airflow, thereby reducing the efficiency and speed of the fan, and the reasonable hub ratio can maximize the airflow while ensuring the strength and stability of the fan blade 3, and improve the work efficiency of the fan blade 3.

[0031] Further, as shown in the figure, Figure 4 a is the cross-sectional airfoil installation angle γ of the root of the fan blade, c is the cross-sectional airfoil installation angle γ of the top of the fan blade, and b is the cross-sectional airfoil installation angle γ of a position between the root and the top of the fan blade, and from the change process of a-b-c, Figure 4 it can be known that the cross section of the fan blade 3 is a wing section, and the wing curvature gradually decreases from the root to the top of the fan blade 3, specifically, as shown in the figure, Figure 5 X is the horizontal coordinate, Y is the vertical coordinate, L is the chord length, the curvature A=y / l, and the curvature position X / l, combined with Figure 6It can be seen that the airfoil radii at the root section of blade 3 are A1, the airfoil radii at the middle section of blade 3 are A2, and the airfoil radii at the top section of blade 3 are A3, and A1>A2>A3. The design of different radii at different positions of blade 3 helps to reduce the separation of airflow and the generation of vortices on the surface of blade 3, and improve the stability and efficiency of airflow. The airfoil installation angle γ of blade 3 gradually decreases from the root to the top, and the difference between the installation angles γ of two adjacent sections has an exponential function relationship. The nonlinear installation angle γ variation design can further optimize the flow state of airflow, reduce airflow resistance and turbulence, thereby improving the efficiency of the fan. The airfoil chord length of blade 3 gradually increases from the root to the top, increasing the lift of blade 3 and improving the thrust performance of the fan.

[0032] The fan blade 3 has a twisted structure. When the fan blade 3 is projected radially, the projection of the top of the fan blade 3 intersects with the projection of the root of the fan blade 3. This twisted structure allows the fan blade 3 to have a suitable angle of attack at different radial positions. When the fan rotates, the airflow impacts the fan blade 3 at different angles and speeds, making the airflow distribution on the fan blade 3 more uniform. The design of the intersecting projections of the top and root of the fan blade 3 allows each part of the fan blade 3 to better adapt to the actual airflow conditions, keeping the angle of attack of the airflow on the surface of the fan blade 3 within an optimal range, reducing airflow separation, improving airflow adhesion, and thus more effectively propelling the airflow.

[0033] like Figure 7 As shown in Figure d, when viewed along the fan's axial direction, the angle between the curve formed by the midpoints of the chords of each airfoil section of the fan blade 3 and the vertical line is α, which is the forward bend angle. The forward bend angle is 10°≤α≤45°. The design of the forward bend angle helps guide airflow through the fan blade 3 in a more optimized way. An appropriate angle can make the airflow smoother, reduce turbulence and resistance, thereby improving the fan's efficiency. By adjusting the forward bend angle, the ability of the fan blade 3 to capture and propel airflow can be changed. Increasing the forward bend angle within a suitable range can generally increase the fan's airflow output. Selecting an appropriate forward bend angle within the range of 10° to 45° can allow the fan to generate greater airflow or air pressure while consuming the same power.

[0034] like Figure 7As shown in FIG. 3, the angle β between the curve formed by the midpoints of the chord lines of the airfoil sections of the fan blades 3 and the vertical line, i.e. the forward-swept angle, is 0°<β≤30°. A suitable forward-swept angle can change the pressure distribution on the surface of the fan blades 3. The forward-swept angle makes the airflow speed on the upper surface of the fan blades 3 relatively increase and the airflow speed on the lower surface of the fan blades 3 relatively decrease during the rotation of the fan blades 3, thereby increasing the pressure difference between the upper and lower surfaces and generating greater lift. In the application of the fan, the increase of the lift helps to push more air, thereby improving the air output of the fan. Meanwhile, the forward-swept angle can also improve the flow state of the airflow and reduce the noise generated by the interaction between the airflow and the surface of the fan blades 3. By optimizing the forward-swept angle, the airflow can flow more smoothly on the surface of the fan blades 3, the generation of turbulence and vortex is reduced, and the aerodynamic noise is reduced.

[0035] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application, therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A new high speed motor fan characterized in that, The fan comprises a central shaft (1), a hub (2) connected to the central shaft (1), and a plurality of blades (3) arranged on the outer periphery of the hub (2), wherein the blades (3) have a sickle-shaped overall profile, the leading edge (5) and the trailing edge (4) of the blades (3) are in arc shape, and the center connecting line of the cross section of the blades (3) is also in arc shape. The cross section of the blades (3) is designed as an airfoil cross section, and the airfoil curvature gradually decreases from the root to the top of the blades (3). Specifically, the airfoil curvature of the root cross section of the blades (3) is A1, the airfoil curvature of the middle cross section of the blades (3) is A2, and the airfoil curvature of the top cross section of the blades (3) is A3, and A1>A2>A3. When viewed in the axial direction of the fan, the angle between the curve formed by the midpoints of the chord lines of each airfoil cross section of the blades (3) and the vertical line is α, which is the front bending angle, and the value of the front bending angle is 10°≤α≤45°. When viewed in the radial direction of the fan, the angle between the curve formed by the midpoints of the chord lines of each airfoil cross section of the blades (3) and the vertical line is β, which is the front sweep angle, and the value of the front sweep angle is 0°<β≤30°. The ratio between the diameter D1 of the hub (2) and the diameter D2 of the outermost edge of the blades (3) is the hub ratio Z=D1 / D2, and the hub ratio is in the range of 0.3≤Z≤0.5, so as to optimize the flow rate and improve the work efficiency of the blades (3).

2. A new high speed motor fan as claimed in claim 1 characterized by: The blades (3) have a twisted structure as a whole, and when the radial projection of the blades (3) is projected, the projection of the top of the blades (3) intersects with the projection of the root of the blades (3).

3. A new high speed motor fan as claimed in claim 1, wherein: The cross-sectional airfoil installation angle γ of the blades (3) gradually decreases from the root to the top, and the difference between the installation angles γ of two adjacent cross sections is in an exponential function relationship.

4. A new high speed motor fan as claimed in claim 1, wherein: The cross-sectional airfoil chord length of the blades (3) gradually increases from the root to the top of the blades (3).

5. A new high speed motor fan as claimed in claim 1, wherein: ​

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