Guide vane for automobile cooling fan

Abstract

The utility model relates to the technical field of cooling, and discloses a guide vane for an automobile cooling fan. The guide vane comprises a hub, a shroud ring and blades, the shroud ring is located on the outer side of the circumference of the hub, the blades are in an arc shape, the two ends of each blade are in a circular arc shape, the circular arc centers of the end faces of the two ends of each blade coincide with each other, the shroud ring is connected with the hub through the multiple blades, and orthographic projection curves of the top ends of the blades meet the angle and position requirements. The guide vane is arranged at the air outlet of the automobile cooling fan, when cooling airflow passes through the guide vane, the guide vane blades guide the airflow to be converted from the circular motion direction to the axial motion direction, the proportion of circumferential invalid motion airflow in the total momentum is reduced, the proportion of axial motion airflow in the total momentum is increased, and the service life of the guide vane is prolonged. The momentum energy in the ineffective movement direction is converted into momentum energy in the effective movement direction through the blades, so that the purpose of improving the aerodynamic efficiency is achieved, and the cooling effect on the engine is improved.

Description

Technical Field

[0001] This utility model relates to the field of cooling technology, specifically to a guide vane for an automotive cooling fan. Background Technology

[0002] When a car engine is running, a cooling fan mounted on the frame cools the engine to prevent it from overheating and being damaged.

[0003] The cooling fan operates in the axial direction. The airflow generated by the fan's rotation is an ineffective energy dissipation motion in the circumferential direction, while the linear motion in the axial direction is an effective work motion.

[0004] The inventor of this utility model has discovered that in existing automobile cooling fans, a large proportion of the airflow makes ineffective rotational motion in the circumferential direction during operation, resulting in poor cooling effect on the engine. Utility Model Content

[0005] The purpose of this invention is to provide a guide vane for an automotive cooling fan to solve the problems mentioned in the background art.

[0006] This utility model embodiment provides a guide vane for an automotive cooling fan, which is disposed at the air outlet of the cooling fan and includes: a hub, a wind guard ring, and blades;

[0007] The wind shield is located on the outer circumference of the wheel hub, and the wind shield is arranged to coincide with the central axis of the wheel hub.

[0008] The blade is arc-shaped, and both ends of the blade are rounded, with the centers of the rounded arcs on the end faces of the blade coinciding with each other.

[0009] The curvature of the end faces of the blades is adapted to the curvature of the hub, and the wind shield ring is connected to the hub through multiple blades;

[0010] The center of the circular arc end face of the blade is denoted as point O, the radius of the circular arc end face of the inner end is denoted as R, and the orthographic projection length of the blade in the axial direction is denoted as A.

[0011] Draw a circle with point O as the center and R and R+N×10%A as radii;

[0012] The orthographic projection curve at the top of the blade intersects with multiple circles, and these intersections are numbered 1, 2 to 11 from the inside out.

[0013] Taking the line connecting point O and intersection point 1 as the polar axis, and the angle between the lines connecting the other intersection points and point O and the polar axis as the polar coordinate angle θ of the intersection points, then the polar coordinate angle θ of the multiple intersection points is:

[0014]

[0015] Where N is a natural number from 1 to 10.

[0016] Based on the above scheme, the guide vane for an automotive cooling fan of this invention comprises a hub, a wind shield ring, and blades. The wind shield ring is located on the outer circumference of the hub, and the blades are arc-shaped with rounded ends. The roundness of the end faces of the blades matches the roundness of the hub. The wind shield ring and the hub are connected by multiple blades. The guide vane for an automotive cooling fan of this invention is located at the air outlet of the cooling fan. The blades of the guide vane have the angle and position characteristics shown in the table. When the automotive cooling fan is rotating, the cooling airflow passes through the guide vane, which guides the airflow from the circumferential motion direction to axial motion, reducing the proportion of ineffective circumferential motion airflow in the total momentum and increasing the proportion of axial motion airflow in the total momentum. By converting the momentum energy in the ineffective motion direction into the momentum energy in the effective motion direction through the blades, the aerodynamic efficiency is improved, thereby enhancing the cooling effect on the engine.

[0017] In one feasible solution, the blade has a streamlined cross-section;

[0018] The upper right corner of the blade section is denoted as point B, the lower left corner of the blade section is denoted as point C, and the angle between the line BC connecting point B and point C and the horizontal line is denoted as α.

[0019] From the outside in, the α value of the cross section of the blade gradually increases at multiple intersection points.

[0020] In one feasible approach, the blade has a different cross-sectional shape at each intersection point.

[0021] In one feasible solution, the blades are inclined in the windward direction, so that the airflow flows along the inclined surface of the blades, guiding the airflow from circumferential motion to axial motion.

[0022] One feasible solution includes: multiple blades are arranged at equal or non-equal intervals in the circumferential direction.

[0023] In one feasible approach, the number of blades is eight. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a guide vane for an automotive cooling fan in an embodiment of the present invention;

[0026] Figure 2 As described in the embodiments of this utility model Figure 1 A schematic diagram of the blade layout in the middle;

[0027] Figure 3 This is a front view of the blade in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the orthographic projection of the blade in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the intersection of the blade and the circle in an embodiment of this utility model;

[0030] Figure 6 This is a schematic diagram showing the angle between the intersection point and the polar coordinates in an embodiment of this utility model;

[0031] Figure 7 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 11 in the diagram;

[0032] Figure 8 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view of point 10 in the middle;

[0033] Figure 9 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 9 in the middle;

[0034] Figure 10 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 8 in the middle;

[0035] Figure 11 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 7 in the diagram;

[0036] Figure 12 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 6 in the diagram;

[0037] Figure 13 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 5 in the diagram;

[0038] Figure 14 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 4 in the diagram;

[0039] Figure 15 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 3 in the diagram;

[0040] Figure 16 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 2 in the middle;

[0041] Figure 17 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view of point 1 in the diagram;

[0042] Figure 18 This is a schematic diagram illustrating the effect of the guide vanes used in an automotive cooling fan according to an embodiment of the present invention.

[0043] Numbering on the map:

[0044] 100. Blade; 210. Hub; 220. Windshield ring. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0049] As described in the background section of this application, the working direction of a cooling fan is axial. The airflow generated by the fan rotation is an ineffective energy dissipation motion in the circumferential direction, while the linear motion in the axial direction is an effective work motion.

[0050] The inventor of this utility model has discovered that in existing automobile cooling fans, a large proportion of the airflow makes ineffective rotational motion in the circumferential direction during operation, resulting in poor cooling effect on the engine.

[0051] To address the aforementioned problems, the inventor of this utility model proposes a technical solution, the specific embodiments of which are as follows:

[0052] Figure 1 This is a schematic diagram of a guide vane for an automotive cooling fan according to an embodiment of the present invention. Figure 2 As described in the embodiments of this utility model Figure 1 A schematic diagram of the blade layout. Figure 3 This is a front view of the blade in an embodiment of the present invention. Figure 4 This is a schematic diagram of the orthographic projection of the blade in an embodiment of this utility model. Figure 5 This is a schematic diagram of the intersection of the blade and the circle in an embodiment of this utility model. Figure 6 This is a schematic diagram showing the angle between the intersection point and the polar coordinates in an embodiment of this utility model. Figure 7 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 11 in the diagram. Figure 8 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 10 in the diagram. Figure 9 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 9 in the diagram. Figure 10 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 8 in the diagram. Figure 11 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 7 in the diagram. Figure 12 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 6 in the diagram. Figure 13 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 5. Figure 14 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 4 in the diagram. Figure 15 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 3 in the diagram. Figure 16 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view at point 2 in the diagram. Figure 17 For the blades in the embodiments of this utility model Figure 5 A cross-sectional view of point 1 in the diagram; Figure 18 This is a schematic diagram illustrating the effect of the guide vanes used in an automotive cooling fan according to an embodiment of the present invention.

[0053] like Figures 1 to 6 As shown, the guide vanes for the automotive cooling fan in this embodiment are fixedly installed at the air outlet of the cooling fan. When the cooling fan rotates, the resulting cooling airflow passes through the guide vanes and then blows towards the fan motor to cool the engine.

[0054] The guide vane includes: blade 100, hub 210, and wind guard ring 220.

[0055] The wind shield 220 is located on the outer circumference of the hub 210. The central axis of the wind shield 220 coincides with the central axis of the hub 210, that is, the arc of the wind shield 220 and the hub 210 are the same.

[0056] like Figure 3 As shown, the blade 100 is an arc shape with a high middle and low ends in the length direction. The two end faces of the blade 100 are arc-shaped, and the centers of the arcs of the two end faces of the blade 100 coincide with each other.

[0057] The curvature of the arc end faces at both ends of the blade 100 is matched (the same) with the curvature of the hub 210 and the wind shield ring 220.

[0058] Multiple blades 100 are provided, and the wind shield ring 220 and the hub 210 are fixedly connected by multiple blades 100. The multiple blades 100 are spaced apart along the circumferential direction.

[0059] like Figure 4 , Figure 5 and Figure 6 As shown, the center of the arc at both ends of the blade 100 is denoted as point O, the radius of the arc on the inner end face of the blade 100 is denoted as R, and the length of the orthographic projection of the blade 100 in the axial direction is denoted as A.

[0060] Draw a circle with point O as the center and R and R+N×10%A as radii.

[0061] Where N is a natural number from 1 to 10, that is, with point O as the center, circles are drawn with radii R, R+10%A, R+20%A, R+30%A, up to R+100%A respectively, forming a total of 11 circles.

[0062] The orthographic projection curve of the tip of blade 100 intersects with the 11 circles at 11 points, which are marked as 1, 2, 3 to 11 from the inside out.

[0063] Taking the line connecting point O and the innermost intersection point 1 as the polar axis (horizontal coordinate axis), and connecting each of the other intersection points to point O, the angle between the line connecting each intersection point to point O and the polar axis is the polar coordinate angle θ of each intersection point. The polar coordinate angles θ of the 11 intersection points formed by the orthographic projection of blade 100 and the circle are shown in the table below:

[0064]

[0065] As can be seen from the above, the guide vane for the automotive cooling fan in this embodiment, by setting a hub, a wind shield ring, and blades, with the wind shield ring located on the outer circumference of the hub, and the blades being arc-shaped with rounded ends, the roundness of the blade ends matching the roundness of the hub, and the wind shield ring connected to the hub by multiple blades, is a key feature. The guide vane for the automotive cooling fan in this embodiment is located at the air outlet of the cooling fan. The guide vane blades have the angle and position characteristics shown in the table. When the automotive cooling fan is rotating, as the cooling airflow passes through the guide vane, the guide vane blades guide the airflow from the circumferential motion direction to axial motion, reducing the proportion of ineffective circumferential motion airflow in the total momentum and increasing the proportion of axial motion airflow in the total momentum. By converting momentum energy in the ineffective motion direction into momentum energy in the effective motion direction through the blades, the aerodynamic efficiency is improved, thereby enhancing the cooling effect on the engine.

[0066] Optional, such as Figures 7 to 17 As shown, in this embodiment, the guide vane for an automotive cooling fan has a streamlined banana-shaped longitudinal section for the blade 100.

[0067] Let the upper right corner of the blade section 100 be designated as point B, and the lower left corner of the blade section 100 be designated as point C. Let the angle between the line BC connecting points B and C and the horizontal line be designated as angle α.

[0068] Then from the outside in, the blade 100 is Figure 5 The α value of the cross section at the 11 intersection points gradually increases, that is, the α value of the cross section of blade 100 at intersection point 11 is the smallest, and the α value of the cross section of blade 100 at intersection point 1 is the largest.

[0069] Furthermore, in this embodiment, the guide vane 100 for the automotive cooling fan is streamlined in the length direction, and the cross-sectional shape of the vane 100 at the 11 intersection points from the outside to the inside is as follows: Figures 7 to 17 As shown, the cross-sections of blade 100 are different at the 11 intersection points.

[0070] Will Figure 7 The cross section shown is placed Figure 5 At the 11 intersections, Figure 8 The cross section shown is placed Figure 5 There are 10 intersection points in the middle, and so on, until the intersection points are reached. Figure 17 The cross section shown is placed Figure 5 At point 1 of the intersection, and arranging each section according to the polar coordinate angles in the table above, connecting the streamlines of each section, the complete single guide vane blade of this embodiment can be obtained.

[0071] Optional, such as Figure 1 As shown, in this embodiment, the guide vanes for an automotive cooling fan have blades 100 facing the windward direction. Figure 1 It is tilted in the Z-axis direction (as shown).

[0072] When the cooling fan rotates, the cooling airflow flows along the inclined surface of the blades 100. The blades 100 guide more airflow from circumferential motion to axial motion, further reducing the proportion of ineffective circumferential motion airflow to the total moving airflow (total momentum) and increasing the proportion of axial motion airflow to the total moving airflow (total momentum). This fully utilizes the momentum energy of the moving airflow, thereby further improving aerodynamic efficiency and enhancing the cooling effect on the engine.

[0073] Optionally, in this embodiment, the guide vanes for the automotive cooling fan can be arranged in a uniform manner with equal spacing in the circumferential direction, or the multiple blades 100 can be arranged in a non-equal spacing manner, that is, the blades 100 are arranged according to actual needs.

[0074] Optionally, in this embodiment, the guide vanes for the automotive cooling fan have eight blades 100. Of course, the number of blades can be adjusted according to actual needs.

[0075] This invention relates to guide vanes for automotive cooling fans, which are installed at the air outlet of the cooling fan. The fan's rotation drives air to move in the direction of rotation (the cross-section of the vanes is horizontal). The airflow passes through... Figures 7-17When the guide vane is at a specific angle, the airflow will be partially twisted into an oblique motion along the blade angle. This oblique motion includes a high component of vertical motion (the vertical direction of the guide vane profile is actually the axial direction in three dimensions). Therefore, the blade has a certain function of converting ineffective rotational energy into effective axial energy.

[0076] The guide vane of this invention, with its blades arranged in a specific shape and angle, performs well and its effect is as follows: Figure 18 As shown in Table 1 and Table 2 below.

[0077] Table 1. Measured performance of automotive cooling fans (without the aforementioned guide vanes)

[0078]

[0079] Table 2. Measured performance of the same automotive cooling fan (with the aforementioned guide vanes).

[0080]

[0081] In this utility model, unless otherwise explicitly specified and limited, the first feature being "on" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium.

[0082] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "under," and "beneath" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0083] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A guide vane for an automotive cooling fan, disposed at the air outlet of the cooling fan, characterized in that, include: Wheel hub, windshield ring, and blades; The wind shield is located on the outer circumference of the wheel hub, and the wind shield is arranged to coincide with the central axis of the wheel hub. The blade is arc-shaped, and both ends of the blade are rounded, with the centers of the rounded arcs on the end faces of the blade coinciding with each other. The curvature of the end faces of the blades is adapted to the curvature of the hub, and the wind shield ring is connected to the hub through multiple blades; The center of the circular arc end face of the blade is denoted as point O, the radius of the circular arc end face of the inner end is denoted as R, and the orthographic projection length of the blade in the axial direction is denoted as A. Draw a circle with point O as the center and R and R+N×10%A as radii; The orthographic projection curve at the top of the blade intersects with multiple circles, and these intersections are numbered 1, 2 to 11 from the inside out. Taking the line connecting point O and intersection point 1 as the polar axis, and the angle between the lines connecting the other intersection points and point O and the polar axis as the polar coordinate angle θ of the intersection points, then the polar coordinate angle θ of the multiple intersection points is: Where N is a natural number from 1 to 10.

2. The guide vane for an automotive cooling fan according to claim 1, characterized in that, The blade has a streamlined cross-section; The upper right corner of the blade section is denoted as point B, the lower left corner of the blade section is denoted as point C, and the angle between the line BC connecting point B and point C and the horizontal line is denoted as α. From the outside in, the α value of the cross section of the blade gradually increases at multiple intersection points.

3. The guide vane for an automotive cooling fan according to claim 2, characterized in that, The cross-sectional shape of the blades is different at each intersection point.

4. The guide vane for an automotive cooling fan according to claim 1, characterized in that, The blades are inclined in the windward direction, so that the airflow flows along the inclined surface of the blades, guiding the airflow from circumferential movement to axial movement.

5. The guide vane for an automotive cooling fan according to claim 1, characterized in that, include: The multiple blades are arranged at equal or non-equal intervals in the circumferential direction.

6. The guide vane for an automotive cooling fan according to claim 1, characterized in that, The number of leaves is eight.

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