Guide vane for automobile cooling fan

Abstract

The invention relates to the technical field of cooling, and discloses a guide vane for an automobile cooling fan. The guide vane comprises a hub, an air protection ring and blades, the air protection 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 an arc shape, the circular arc centers of the end faces of the two ends of each blade coincide with each other, the air protection 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, guide vane blades guide the airflow to be converted into axial movement from the circular movement direction, the proportion of circumferential invalid movement airflow in the total momentum is reduced, the proportion of axial movement airflow in the total momentum is increased, and the cooling effect is improved. 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] The embodiment of the present invention relates to the field of cooling technology, and in particular to a guide vane for an automobile cooling fan. Background Art

[0002] When the automobile engine is working, the cooling fan installed on the frame is used to cool the engine to prevent the engine from overheating and being damaged.

[0003] The working direction of the cooling fan is axial. The airflow formed by the rotation of the fan, the rotational motion of the airflow in the circumferential direction is an invalid motion behavior that dissipates energy, and the linear motion in the axial direction is an effective motion behavior that does work.

[0004] The inventor of the present application has discovered that, in the existing automobile cooling fan, a large proportion of the airflow performs ineffective rotational motion in the circumferential direction when the fan is working, and the cooling effect on the engine is poor. Summary of the invention

[0005] The object of the present invention is to provide a guide vane for an automobile cooling fan to solve the above-mentioned problems in the background technology.

[0006] The embodiment of the present invention provides a guide vane for a car cooling fan, which is arranged at the air outlet of the cooling fan and includes: a hub, an air protection ring and a blade;

[0007] The wind protection ring is located outside the circumference of the hub, and the wind protection ring and the center axis of the hub are arranged to overlap with each other;

[0008] The blade is in an arc shape, the two ends of the blade are in an arc shape, and the centers of the arcs of the end surfaces at the two ends of the blade coincide with each other;

[0009] The arcuate of the end surfaces at both ends of the blades matches the arcuate of the hub, and the wind protection ring is connected to the hub through a plurality of the blades;

[0010] The center of the circular arc end surface of the blade is recorded as point O, the radius of the circular arc end surface at the inner end is recorded as R, and the orthographic projection length of the blade in the axial direction is recorded as A;

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

[0012] The forward projection curve of the blade top and a plurality of circles respectively form intersection points, and the plurality of intersection points are sequentially recorded as 1, 2 to 11 from the inside to the outside;

[0013] The line connecting point O and intersection point 1 is taken as the polar axis, and the angle between the lines connecting the remaining intersection points and point O and the polar axis is the polar coordinate angle θ of the intersection point. Then the polar coordinate angle θ of multiple intersection points is:

[0014]

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

[0016] Based on the above scheme, it can be known that the guide vane for the automobile cooling fan of the present invention is provided with a hub, an air protection ring and blades, the air protection ring is located outside the circumference of the hub, the blades are in an arc shape, the two ends of the blades are in an arc shape, the arc of the end faces at both ends of the blades is adapted to the arc of the hub, and the air protection ring is connected to the hub through a plurality of blades. The guide vane for the automobile cooling fan of the present invention is provided at the air outlet of the cooling fan, and the blades of the guide vane have the angle and position characteristics shown in the table. When the automobile cooling fan rotates during operation and the cooling airflow passes through the guide vane, the guide vane blade guides the airflow to be converted from the circumferential motion direction to the axial motion, thereby reducing the proportion of the circumferential invalid motion airflow in the total momentum and increasing the proportion of the axial motion airflow in the total momentum. The kinetic energy in the invalid motion direction is converted into the kinetic energy in the effective motion direction through the blades, thereby achieving the purpose of improving the aerodynamic efficiency and improving the cooling effect on the engine.

[0017] In a feasible solution, the cross section of the blade is streamlined;

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

[0019] Then, from outside to inside, the α value of the cross section of the blade at multiple intersection points gradually increases.

[0020] In a feasible solution, the cross-sectional shape of the blade at each intersection is different.

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

[0022] In a feasible solution, the plurality of blades are arranged equidistantly or unequally in the circumferential direction.

[0023] In a feasible solution, the number of the blades is eight. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

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

[0026] Figure 2 In the embodiment of the present invention Figure 1 Schematic diagram of blade layout in FIG.

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

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

[0029] Figure 5 is a schematic diagram of the intersection of a blade and a circle in an embodiment of the present invention;

[0030] Figure 6 Schematic diagram of the angle between the intersection point and the polar coordinates in an embodiment of the present invention;

[0031] Figure 7 The blade in the embodiment of the present invention is Figure 5 A schematic cross-sectional view at point 11 in FIG.

[0032] Figure 8 The blade in the embodiment of the present invention is Figure 5 A schematic cross-sectional view at point 10 in FIG.

[0033] Fig. 9 The blade in the embodiment of the present invention is Figure 5 A schematic cross-sectional view at point 9 in FIG.

[0034] Fig.10 The blade in the embodiment of the present invention is Figure 5 A schematic cross-sectional view at point 8 in FIG.

[0035] Fig.11 The blade in the embodiment of the present invention is Figure 5 A schematic cross-sectional view at point 7 in FIG.

[0036] Fig.12 The blade in the embodiment of the present invention is Figure 5 A schematic cross-sectional view at point 6 in FIG.

[0037] Fig.13 The blade in the embodiment of the present invention is Figure 5 A schematic cross-sectional view at point 5 in FIG.

[0038] Fig.14 The blade in the embodiment of the present invention is Figure 5 A schematic cross-sectional view at point 4 in FIG.

[0039] Fig.15 The blade in the embodiment of the present invention is Figure 5A schematic cross-sectional view at point 3 in FIG.

[0040] Fig.16 The blade in the embodiment of the present invention is Figure 5 Schematic cross-sectional view at point 2 in FIG.

[0041] Fig.17 The blade in the embodiment of the present invention is Figure 5 Schematic cross-sectional view at point 1 in FIG.

[0042] Fig.18 It is a schematic diagram of the effect of the guide vanes used for the automobile cooling fan in an embodiment of the present invention.

[0043] Numbers in the figure:

[0044] 100, blade; 210, hub; 220, wind shielding ring. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0049] As described in the background technology of this application, the working direction of the cooling fan is axial, and the airflow formed by the rotation of the fan, the rotational motion of the airflow in the circumferential direction is an invalid motion behavior that dissipates energy, and the linear motion in the axial direction is an effective motion behavior that performs work.

[0050] The inventor of the present application has discovered that, in the existing automobile cooling fan, a large proportion of the airflow performs ineffective rotational motion in the circumferential direction when the fan is working, and the cooling effect on the engine is poor.

[0051] In order to solve the above problems, the inventor of the present application proposed the technical solution of the present application, and the specific embodiments are as follows:

[0052] Figure 1 is a schematic diagram of a guide vane for a cooling fan of an automobile in an embodiment of the present invention, Figure 2 In the embodiment of the present invention Figure 1 Schematic diagram of blade layout in Figure 3 is a front view of a blade in an embodiment of the present invention, Figure 4 is a schematic diagram of an orthographic projection of a blade in an embodiment of the present invention, Figure 5 is a schematic diagram of the intersection of a blade and a circle in an embodiment of the present invention, Figure 6 is a schematic diagram of the angle between the intersection point and the polar coordinates in an embodiment of the present invention, Figure 7 The blade in the embodiment of the present invention is Figure 5 A schematic cross-sectional view at point 11 in FIG. Figure 8 The blade in the embodiment of the present invention is Figure 5 A schematic cross-sectional view at point 10 in FIG. Fig. 9 The blade in the embodiment of the present invention is Figure 5 The cross-sectional view at point 9 in FIG. Fig.10 The blade in the embodiment of the present invention is Figure 5 The cross-sectional view at point 8 in FIG. Fig.11 The blade in the embodiment of the present invention is Figure 5 The cross-sectional view at point 7 in FIG. Fig.12 The blade in the embodiment of the present invention is Figure 5 The cross-sectional view at point 6 in FIG. Fig.13 The blade in the embodiment of the present invention is Figure 5 The cross-sectional view at point 5 in FIG. Fig.14 The blade in the embodiment of the present invention is Figure 5 A schematic cross-sectional view of point 4 in FIG. Fig.15 The blade in the embodiment of the present invention is Figure 5The cross-sectional view at point 3 in the figure is as follows: Fig.16 The blade in the embodiment of the present invention is Figure 5 The cross-sectional view at point 2 in the figure is as follows: Fig.17 The blade in the embodiment of the present invention is Figure 5 Schematic cross-sectional view at point 1 in FIG. Fig.18 It is a schematic diagram of the effect of the guide vanes used for the automobile cooling fan in an embodiment of the present invention.

[0053] like Figures 1 to 6 As shown, the guide vane of the automobile cooling fan of this embodiment is fixedly arranged at the air outlet of the cooling fan. When the cooling fan rotates, the cooling airflow formed passes through the guide vane and then blows toward the air motor to cool the engine.

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

[0055] The wind protection ring 220 is located outside the circumference of the wheel hub 210 , and the central axis of the wind protection ring 220 and the central axis of the wheel hub 210 are arranged to coincide with each other, that is, the wind protection ring 220 and the wheel hub 210 have the same arc.

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

[0057] The arc angles of the arc end surfaces at both ends of the blade 100 are matched with (the same as) the arc angles of the hub 210 and the wind shielding ring 220 .

[0058] There are a plurality of blades 100 , and the wind protection ring 220 is fixedly connected to the hub 210 via the plurality of blades 100 , and the plurality of blades 100 are spaced apart in the circumferential direction.

[0059] like Figure 4 , Figure 5 and Figure 6 As shown, the centers of the arcs of the two end arc surfaces of the blade 100 are marked as point O, the arc radius of the inner end surface of the blade 100 is marked as R, and the orthographic projection length of the blade 100 in the axial direction is marked as A.

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

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

[0062] The orthographic projection curve of the top of the blade 100 and the 11 circles respectively form 11 intersection points, and the 11 intersection points are marked as 1, 2, 3 to 11 from the inside to the outside.

[0063] The line connecting point O and the innermost intersection point 1 is taken as the polar axis (horizontal coordinate axis), and the remaining intersection points are connected to point O respectively. The angle between the line connecting point O and 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 the blade 100 and the circle are shown in the following table:

[0064]

[0065] It is not difficult to find from the above content that the guide vane for the automobile cooling fan of this embodiment is provided with a hub, an air shielding ring and blades, the air shielding ring is located outside the circumference of the hub, the blades are in an arc shape, the two ends of the blades are in an arc shape, the arc of the end faces at both ends of the blades is adapted to the arc of the hub, and the air shielding ring is connected to the hub through a plurality of blades. The guide vane for the automobile cooling fan of this embodiment is provided at the air outlet of the cooling fan, and the blades of the guide vane have the angle and position characteristics shown in the table. When the automobile cooling fan rotates during operation and the cooling airflow passes through the guide vane, the guide vane guides the airflow from the circumferential motion direction to the axial motion, thereby reducing the proportion of the circumferential invalid motion airflow in the total momentum and increasing the proportion of the axial motion airflow in the total momentum. The kinetic energy in the invalid motion direction is converted into the kinetic energy in the effective motion direction through the blades, thereby achieving the purpose of improving the aerodynamic efficiency and improving the cooling effect on the engine.

[0066] Optional, such as Figures 7 to 17 As shown, in the guide vane for the automobile cooling fan in this embodiment, the longitudinal section of the blade 100 is a streamlined banana shape.

[0067] The upper right corner of the cross section of the blade 100 is recorded as point B, the lower left corner of the cross section of the blade 100 is recorded as point C, and the angle between the line BC connecting point B and point C and the horizontal line is recorded as angle α.

[0068] From outside to inside, blade 100 is Figure 5 The α values ​​of the cross sections at the 11 intersections gradually increase, that is, the α value of the cross section of the blade 100 at the intersection 11 is the smallest, and the α value of the cross section of the blade 100 at the intersection 1 is the largest.

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

[0070] Will Figure 7 The cross section shown is placed at Figure 5 At the intersection 11, Figure 8 The cross section shown is placed at Figure 5 The intersection point 10 in the middle, and so on, until the Fig.17 The cross section shown is placed at Figure 5 The intersection 1 in the figure is arranged at each cross section according to the polar coordinate angle in the above table, and the streamlines of each cross section are connected to obtain a complete single guide vane blade of the present embodiment.

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

[0072] When the cooling fan rotates, the cooling airflow flows along the inclined surface of the blade 100, and the blade 100 guides more airflow to be converted from circumferential motion to axial motion, further reducing the proportion of circumferential ineffective motion airflow in the total motion airflow (total momentum), and increasing the proportion of axial motion airflow in the total motion airflow (total momentum), making full use of the kinetic energy of the motion airflow, thereby further achieving the purpose of improving aerodynamic efficiency and further improving the cooling effect on the engine.

[0073] Optionally, in the guide vane of the automobile cooling fan in this embodiment, the multiple blades 100 can be evenly arranged with equal spacing in the circumferential direction, and the multiple blades 100 can also be arranged with non-equal spacing, that is, the blades 100 are arranged according to actual needs.

[0074] Optionally, in the guide vane of the automobile cooling fan in this embodiment, the number of the blades 100 is eight. Of course, the number of the blades can be adjusted according to actual needs.

[0075] The guide vane of the automobile cooling fan of the present invention is installed at the air outlet of the cooling fan. The rotation of the fan drives the air to move in the rotating direction (the cross section of the blade is horizontal). Figure 7-Figure 17 When the guide vane is at a specific angle as shown, the airflow will be partially twisted into an oblique motion along the angle of the blade. This oblique motion contains a higher component of vertical motion (the vertical direction of the guide vane section, which is actually axial in three dimensions). Therefore, the blade has a certain function of converting invalid rotational energy into effective axial energy.

[0076] The guide vane of the present invention has a better effect when the blade is arranged in a specific shape and angle. Fig.18 , and as shown in Tables 1 and 2 below.

[0077] Table 1 Automobile cooling fan (measured performance without the above guide vanes)

[0078]

[0079] Table 2 The same automotive cooling fan (with the above guide vanes)

[0080]

[0081] In the present invention, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact via an intermediate medium.

[0082] Moreover, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A guide vane for a car cooling fan, arranged at the air outlet of the cooling fan, characterized in that: include: Hub, wind shield and blades; The wind protection ring is located outside the circumference of the hub, and the wind protection ring and the center axis of the hub are arranged to overlap with each other; The blade is in an arc shape, the two ends of the blade are in an arc shape, and the centers of the arcs of the end surfaces at the two ends of the blade coincide with each other; The arcuate of the end surfaces at both ends of the blades matches the arcuate of the hub, and the wind protection ring is connected to the hub through a plurality of the blades; The center of the circular arc end surface of the blade is recorded as point O, the radius of the circular arc end surface at the inner end is recorded as R, and the orthographic projection length of the blade in the axial direction is recorded as A; Draw a circle with O as the center and R and R+N×10%A as the radius; The forward projection curve of the blade top and a plurality of circles respectively form intersection points, and the plurality of intersection points are sequentially recorded as 1, 2 to 11 from the inside to the outside; The line connecting point O and intersection point 1 is taken as the polar axis, and the angle between the lines connecting the remaining intersection points and point O and the polar axis is the polar coordinate angle θ of the intersection point. Then the polar coordinate angle θ of multiple intersection points is: Wherein, N is a natural number from 1 to 10.

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

3. The guide vane for a vehicle cooling fan according to claim 2, characterized in that: The cross-sectional shape of the blade at each intersection is different.

4. The guide vane for a vehicle cooling fan according to claim 1, characterized in that: The blades are arranged to be inclined in the windward direction, so that the airflow flows along the inclined surface of the blades, guiding the airflow to transform from circumferential motion to axial motion.

5. The guide vane for a vehicle cooling fan according to claim 1, characterized in that: include: The plurality of blades are arranged at equal or non-equidistant intervals in the circumferential direction.

6. The guide vane for a vehicle cooling fan according to claim 1, characterized in that: The number of the blades is eight.

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