CN111546876A - A grille blade for a vehicle, an air intake grille and a vehicle - Google Patents

Abstract

The invention provides a grille blade for a vehicle. The cross-section of the grille blade is an airfoil structure, and the airfoil structure includes a leading edge, a trailing edge, a first profile line, a second profile line and a chord length. The front ends of the molding line and the second molding line are connected with the front edge, the rear ends of the first molding line and the second molding line are connected with the rear edge, and the chord length is the distance from the front edge to the rear edge; the first molding line There is a first segment point on the upper part, a second segment point is arranged on the second profile line, the first connection line between the first segment point and the second segment point is the maximum thickness of the grille blade, and the first connection line It is 0.07-0.11 times the chord length; on this basis, the present invention also provides an air intake grille and a vehicle; the cross section of the grille blade provided by the present invention has an airfoil structure, which is more in line with aerodynamics and has good airfoil. The diversion and diversion effect can effectively avoid eddy current dissipation; improve the heat dissipation effect on the cabin, and greatly improve the thermal management performance of the vehicle cabin.

Description

A grille blade for a vehicle, an air intake grille and a vehicle

technical field

The invention relates to the technical field of automobile parts manufacturing, in particular to a grille blade, an air intake grille and a vehicle for vehicles.

Background technique

With the continuous development of the automobile industry, the increasingly serious problems of global environmental pollution and energy depletion, new energy vehicles are growing rapidly and may replace traditional fuel vehicles in the near future. Therefore, the research on various properties of new energy vehicles is particularly important, especially the research on the thermal management system of the whole vehicle.

The thermal management system of new energy vehicles is generally equipped with active air intake grilles. The air intake grille is installed in front of the vehicle engine to provide air intake and heat dissipation for the engine: in hot seasons, the active air intake grille is opened, which can give the maximum heat dissipation power to the engine when the vehicle is started; During the season, the air intake grille is closed to prevent the entry of cold air, which is conducive to the acceleration of the temperature of the engine and gearbox oil, making the vehicle enter a better working state faster; and can improve the heating effect when using the warm air function in winter.

However, in the prior art, the grille vanes usually have a regular shape structure. When the grille vanes are in a fully open state, the horizontal intake air flow through the regular-shaped grille vanes can lead out the horizontal outlet airflow to provide the engine with Good heat dissipation; but when the grille blades are not fully opened, the horizontal inlet air flow will produce (1) horizontal outlet air flow, (2) oblique outlet air flow along the opening angle of the grille blades and (3) ) turbulent flow These three parts of the air flow, the existence of turbulence makes the diversion effect poor, and the thermal management efficiency of the vehicle is low. In order to meet the air intake volume requirements of the same heat dissipation performance, it is necessary to install a grille air intake opening with a larger area, which will affect the wind resistance of the whole vehicle and adversely affect the battery life.

In view of the above problems existing in the prior art, the present application aims to provide a grille blade for a vehicle, an air intake grille and a vehicle using the same, which can reduce the air resistance of the air intake grille, suppress the generation of turbulence, reduce The air intake air resistance of the small vehicle cabin is reduced, while the emission is reduced, and the power and economy of the vehicle are improved.

SUMMARY OF THE INVENTION

In view of the above problems of the prior art, the purpose of the present invention is to provide a grille blade, an air intake grille and a vehicle for a vehicle.

In order to solve the above problems, the present invention provides a grille blade for a vehicle, the cross-section of the grille blade is an airfoil structure, and the airfoil structure includes a leading edge, a trailing edge, a first profile line, a second profile The profile line and the chord length, the front ends of the first profile line and the second profile line are connected with the front edge, and the rear ends of the first profile line and the second profile line are connected with the rear The edges are connected, and the chord length is the distance from the leading edge to the trailing edge;

A first segment point is provided on the first profile line, a second segment point is provided on the second profile line, and a first connection line between the first segment point and the second segment point is the maximum thickness of the grille blade, and the first connecting line is 0.07-0.11 times the chord length.

Specifically, the distance from the leading edge to the first connecting line is 0.2-0.3 times the chord length.

Further, the airfoil structure also includes a middle arc line connecting the leading edge and the trailing edge, the middle arc line is provided with a fourth segment point, and the chord length is provided with a third segment The second connecting line between the third segment point and the fourth segment point is the maximum relative curvature of the grille blade, and the second connecting line is 0.02-0.04 times the chord length.

Specifically, the distance from the leading edge to the second connecting line is 0.4-0.6 times the chord length.

Further, the grille blades are provided with installation holes, and the installation holes are arranged in the middle of the first connecting line.

Another aspect of the present invention protects an air intake grill, which includes a fixing frame and a grill assembly, the grill assembly includes a rotating shaft and the grill blade described in the above technical solution, and the fixing frame includes an air inlet and an air outlet, The air inlet and the air outlet are communicated through an air duct, one end of the rotating shaft is fixedly connected to one side of the fixing frame, and the other end of the rotating shaft passes through the installation hole of the grille blade and is connected to the The other side of the fixing frame is fixedly connected, the grille blade is located in the air duct and can be rotated on the rotating shaft, the front edge of the grille blade faces the air inlet, and the rear edge of the grille blade towards the air outlet.

Specifically, the number of the grille assemblies is multiple, the multiple grille assemblies are evenly arranged in the air duct, and the rotation axes of the grille assemblies are parallel to each other.

Specifically, the distance between the rotating shafts of two adjacent grill assemblies is less than or equal to the chord length of the grille vanes, and the distance between the rotating shafts and the air outlet is greater than the chord length of the grille vanes.

Further, a connecting rod is also included, and the connecting rod is used to link the grille blades.

Another aspect of the present invention protects a vehicle, which includes the air intake grille described in the above technical solution.

Due to the above-mentioned technical scheme, the present invention has the following beneficial effects:

A grille blade for a vehicle provided by the present invention has an airfoil-shaped structure in cross section, which is more aerodynamic; the rear edge of the grille blade 20 is slender and designed, which can effectively avoid eddy current dissipation. The air intake grille using this grille blade not only reduces the wind resistance when the airflow passes through, improves the aerodynamic performance and power consumption economy of the whole vehicle, but also has a good diversion and diversion effect, which can make the air intake grille. The airflow from the air outlet effectively acts on the cooling module at the front end of the cabin, which improves the heat dissipation of the cabin and greatly improves the thermal management performance of the vehicle cabin.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following will briefly introduce the accompanying drawings that are required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the structural representation of the air intake grill in the prior art;

2 is a cross-sectional view of a grille blade for a vehicle according to an embodiment of the present invention;

3 is a schematic structural diagram of an air intake grill provided by an embodiment of the present invention;

FIG. 4 is a simulation diagram of the flow diversion of the intake grill provided by the present invention under different working conditions.

In the figure: 10-fixed frame, 20-grid blade, 21-leading edge, 22-trailing edge, 23-first profile line, 231-first segment point, 24-second profile line, 241-second profile Segment point, 25-chord length, 251-third segment point, 26-first connection, 27-middle arc, 271-fourth segment point, 28-second connection, 30-reel.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. In addition, the terms of the direction or positional relationship indicated by the terms "front", "rear" and the like are based on the direction or positional relationship shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have The particular orientation, construction and operation in the particular orientation, and therefore not to be construed as a limitation of the invention; the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion.

As shown in FIG. 1 , which is a schematic structural diagram of an air intake grill in the prior art, when the grill blades in the prior art are not fully opened, the horizontal intake air flow will produce (1) horizontal outlet air The three parts of the outgoing air flow are (2) the inclined outgoing air flow along the opening angle of the grille blades and (3) the turbulent flow.

Example 1

As shown in FIG. 2 , this embodiment provides a grille blade 20 for a vehicle. The cross-section of the grille blade 20 is an airfoil structure, and the airfoil structure includes a leading edge 21 , a trailing edge 22 , a first type Line 23, second profile line 24 and chord length 25, the front ends of the first profile line 23 and the second profile line 24 are connected to the front edge 21, and the rear ends of the first profile line 23 and the second profile line 24 are connected to the rear edge. The edges 22 are connected, and the chord length 25 is the distance from the leading edge 21 to the trailing edge 22;

A first segment point 231 is provided on the first profile line 23, a second segment point 241 is provided on the second profile line 24, and the first connection line 26 between the first segment point 231 and the second segment point 241 is The maximum thickness of the grille blade, the first connecting line 26 is 0.07-0.11 times the chord length 25 , and the shortest distance from the leading edge 21 to the first connecting line 26 is 0.2-0.3 times the chord length 25 .

It should be noted that, in this specification, the cross-section of the grille blade 20 refers to a cross-section perpendicular to the length direction of the grille blade 20 , and the first connecting line 26 and the chord length 25 are perpendicular to each other.

The airfoil structure also includes a middle arc line 27 connecting the leading edge 21 and the trailing edge 22, the chord length 25 is provided with a third segment point, the middle arc line 27 is provided with a fourth segment point 271, and the third segment point The second connecting line 28 between 251 and the fourth segment point 271 is the maximum relative curvature of the grille blade, and the second connecting line 28 is 0.02-0.04 times the chord length 25; the shortest distance from the leading edge 21 to the second connecting line 28 It is 0.4-0.6 times the chord length of 25.

It should be noted that, in the embodiment of this specification, the distance between the first profile line 21 and the second profile line 22 is the thickness of the grille blade 20 , and there is a thickness of the grille blade 20 at the first connecting line 26 . The maximum value; the mid-arc line of the airfoil structure is a curve formed by connecting the midpoints of the upper and lower arcs of the airfoil parallel to the y-axis after establishing a rectangular coordinate system with the leading edge as the origin and the chord length as the horizontal axis. It is used to characterize the degree of curvature of the airfoil; the distance between the mid-arc line 27 and the chord length 25 is the relative camber of the grille blade, and the second connecting line 28 has the maximum relative camber of the grille blade; therefore, by determining The length proportional relationship between the first connecting line 26, the second connecting line 28 and the chord length 25, and the proportional relationship between the distance between the first connecting line 26 and the second connecting line 28 to the leading edge 21 and the chord length 25, The shape features of the airfoil structure can be determined, so as to obtain a grille blade for a vehicle provided by the embodiments of the present specification.

As shown in FIG. 2 , the curvature of the front edge 21 of the grille blade 20 is small, so that the airflow passing through the grille blade 20 can better fit the surface of the grille blade, so as to avoid the early separation of the airflow to generate eddy currents and cause vortex energy loss. ; The trailing edge 22 of the airfoil structure is thinned and thinned, which can quickly separate the airflow passing through it, suppress the generation of eddy currents and make the airflow pass more smoothly.

The grille blade 20 is provided with an installation hole, and the installation hole is arranged in the middle of the first connection line 26 ; preferably, the installation hole is arranged at the midpoint of the first connection line 26 .

As shown in FIG. 3 , the embodiment of this specification also provides an air intake grille, including a fixing frame 10 and a grille assembly, the fixing frame 10 includes an air inlet, an air outlet and an air duct, and the air inlet and the air outlet are connected through the air duct. The grille assembly includes the above-mentioned grille blades 20 and a rotating shaft 30, one end of the rotating shaft 30 is fixedly connected with one side of the fixing frame 10, and the other end of the rotating shaft 30 passes through the installation hole of the grille blade 20 and is connected with the other side of the fixing frame 10. The sides are fixedly connected, and the grille blades 20 are located in the air duct and can rotate relative to the rotating shaft 30 . The leading edge 21 of the grille vane 20 faces the air inlet, and the trailing edge 22 of the grille vane 20 faces the air outlet.

Since the mounting hole is located in the middle of the first connecting line of the grille blade 20, that is, the middle position where the rotating shaft 30 passes through the maximum thickness of the grille blade 20, where the torque is the smallest, the torque required for the rotation of the grille blade can be reduced and improved. Flexibility of grille blade rotation.

The number of grille assemblies is multiple, the multiple grille assemblies are evenly arranged in the air duct, and the rotating shafts 30 of each grille assembly are parallel to each other. The air intake grill shown in FIG. 3 is provided with two grill assemblies, and the two grill assemblies are perpendicular to the air duct and are arranged up and down in the air duct.

The distance between the rotating shafts 30 of two adjacent grille assemblies is less than or equal to the chord length 25 of the grille blade 20, the distance from the rotating shaft 30 to the air outlet is greater than the chord length 25 of the grille blade 20, and the distance from the rotating shaft 30 to the air inlet port greater than the chord length 25 of the grille blade 20; thus the grille blade 20 is located in the air duct as a whole, and with the rotation of the grille blade 20, when the grille blade 20 rotates from being parallel to the air duct to being perpendicular to the air duct In this state, the adjacent grille blades 20 can be connected to the end to close the air intake duct. The grille blade 20 is rotatably connected with the rotating shaft 30, and the rotation angle of the grille blade 20 is in the range of 0° to 90°. The turning angle of the grille vanes 20 refers to the angle between the grille vanes and the intake air flow.

The air intake grille further includes a connecting rod, which is connected with the grille vanes 20 of each grille assembly for linking all the grille vanes 20 . The connecting rod is also connected with a controller for controlling the opening and closing of the grille vanes 20 and adjusting the rotation angle of the grille vanes 20 .

In the air intake grill provided by the embodiments of this specification, the grill blades can be rotated. When the rotation angle is 0°, as shown in FIG. The rear edge 22 of the grille is facing the air outlet, the chord length 25 of the grille blade is parallel to the air duct, and the grille blade is in a fully open state, which can give the maximum heat dissipation power to the engine when the vehicle is started; When there is an included angle between the flows, that is, as shown in Figure 3(b), after passing through the grille blades, the airflow at the trailing edge 22 is quickly separated, and can pass more smoothly without the generation of eddy currents; In the severe winter, the angle of the grille blades is 90°. The rotation of the grille blades shields the air inlet and prevents cold air from entering the engine compartment. ; And can improve the heating effect when using the warm air function in winter.

This embodiment provides an air intake grill, wherein the frame 10 has an air inlet and an air outlet with a size of 0.6m*0.06m, and the length of the air duct is 0.16m. According to the size of the frame, the size of the grille blades 20 is selected and The length of the chord length 25 of the grille blade is set to be 0.06m, and the proportional relationship between the chord length 25 and the first connecting line 26 and the second connecting line 28 is set as follows:

The length of the first connection line 26 is 0.0044m, the distance from the leading edge 21 to the first connection line is 0.012m, the length of the second connection line 28 is 0.0132m, and the distance from the front edge to the second connection line is 0.03m. The flow diversion simulation analysis of the air intake grille with this size feature is carried out.

The embodiments of the present specification also provide a vehicle, the vehicle includes the air intake grill provided by the above technical solution, the air intake grill is arranged at the front end of the vehicle, and the air outlet of the air intake grill is communicated with the engine compartment.

As shown in Fig. 4(a) to Fig. 4(f), the simulation diagrams of the flow diversion of the vehicle with the air intake grille installed at different vehicle speeds and the grille vanes 20 of the air intake grille at different turning angles are shown in Figs. The line with an arrow in the middle represents the airflow, and the shade of the color represents the magnitude of the velocity.

Fig. 4(a) is the diversion diagram when the vehicle speed is 30km/h and the turning angle of the grille vane is 0°. At this time, the grille vane 20 is in a fully opened state, and the grille vane 20 is parallel to the intake air flow. Due to the change of the flow area with the airfoil structure, the airflow will accelerate when it flows through the grille blades, that is, in the dark part of the figure (a), after the intake air flows through the grille blades 20 with a smooth outer contour, the Outlet the horizontal air flow.

When the vehicle speed is 30km/h and the turning angle of the grille blades 20 is 15°, that is, when the windward angle between the grille blades 20 and the intake air flow is 15°, as shown in Figure 4(b), the horizontal intake air flow passes through The grille vanes 20 produce outgoing air flows that are inclined but still parallel to each other, and the inclination angle of the outgoing airflow is approximately the same as the turning angle of the grille vanes 20 . Compared with the prior art, when the vehicle speed is 30km/h and the turning angle of the grille vane 20 is 15°, the air flow can closely fit the grille during the process of passing through the grille vane 20. The surface of the blade 20 flows without generating turbulence.

Figure 4(c) is the simulation image of the diversion when the vehicle speed is 60km/h and the grille vanes are fully opened; Figure (e) is the simulation image of the diversion when the vehicle speed is 100km/h and the grille vanes are fully opened. The grille vanes 20 play a good role in dividing and guiding the airflow.

Figure 4(d) is the simulation image of the diversion when the vehicle speed is 60km/h and the windward angle between the grille blades 20 and the intake air flow is 15°. The diversion simulation image when the windward angle of the intake air flow is 15°. Under these two conditions, the airflow at the rear edge of the grille blade is divided, but there is still no turbulence. Therefore, when the vehicle runs in the middle At high speeds, it can still provide a good heat dissipation effect to the engine and enhance the thermal management performance of the cabin.

A grille blade for a vehicle provided by the embodiment of this specification has an airfoil structure in cross section, which is more aerodynamic; the rear edge of the grille blade 20 is slender and designed, which can effectively avoid eddy current dissipation. The air intake grille using this grille blade not only reduces the wind resistance when the airflow passes through, improves the aerodynamic performance and power consumption economy of the whole vehicle, but also has a good diversion and diversion effect, which can make the air intake grille. The airflow from the air outlet effectively acts on the cooling module at the front end of the cabin, which improves the heat dissipation of the cabin and greatly improves the thermal management performance of the vehicle cabin.

In addition, the grille blades and air intake grilles for vehicles provided by the embodiments of this specification can reduce the size of the air intake grille on the premise of the same air intake volume requirement/heat exchange. It is beneficial to reduce the wind resistance of the whole vehicle (especially the wind resistance when the vehicle is running at high speed), and greatly reduces the energy consumption of the whole vehicle. Further, the cruising performance of the entire vehicle can be effectively improved.

Example 2

This embodiment provides a grille vane and an air intake grille for a vehicle. The difference from Embodiment 1 is that the chord length of the grille vane is 0.06m, and the first connecting line 26 is 0.07m of the chord length. times, that is, the length of the first connecting line 26 is 0.0042m; the distance from the leading edge 21 to the first connecting line 26 is 0.25 times the chord length 25, that is, the distance from the leading edge 21 to the first connecting line 26 is 0.015m;

The length of the second connecting line 28 is 0.02 times the chord length, that is, the length of the second connecting line 28 is 0.0012m; the distance from the leading edge 21 to the second connecting line 28 is 0.4 times the chord length, that is, the leading edge 21 to the second connecting line 28. The distance of the connection line 28 is 0.024m.

Example 3

This embodiment provides a grille vane and an air intake grille for a vehicle. The difference from Embodiment 1 is that the chord length of the grille vane is 0.06m, and the first connecting line 26 is 0.11m of the chord length. times, that is, the length of the first connecting line 26 is 0.0066m; the distance from the leading edge 21 to the first connecting line 26 is 0.3 times the chord length 25, that is, the distance from the leading edge 21 to the first connecting line 26 is 0.018m;

The length of the second connecting line 28 is 0.04 times the chord length, that is, the length of the second connecting line 28 is 0.024 m; the distance from the leading edge 21 to the second connecting line 28 is 0.6 times the chord length, that is, the leading edge 21 to the second connecting line 28. The distance of the connection line 28 is 0.036m.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and does not deviate from the spirit of the present invention or With the essential features, the present invention can be implemented in other specific forms. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

Claims (10)

1. A grille blade for a vehicle, characterized in that the cross-section of the grille blade is an airfoil structure, and the airfoil structure comprises a leading edge (21), a trailing edge (22), a first type A line (23), a second profile line (24) and a chord length (25), the front ends of the first profile line (23) and the second profile line (24) are connected with the front edge (21) , the rear ends of the first profile line (23) and the second profile line (24) are both connected to the rear edge (22), and the chord length (25) is the front edge (21) the distance to the trailing edge (22); The first profile line (23) is provided with a first segment point (231), the second profile line (24) is provided with a second segment point (241), and the first segment point ( 231) The first connecting line (26) with the second segment point (241) is the maximum thickness of the grille blade, and the first connecting line (26) is 0.07 of the chord length (25) -0.11 times. 2. A grille blade for a vehicle according to claim 1, characterized in that, the distance from the leading edge (21) to the first connecting line (26) is the chord length (25) 0.2-0.3 times. 3. A grille blade for a vehicle according to claim 2, characterized in that the airfoil structure further comprises an arc line connecting the leading edge (21) and the trailing edge (22) (27), the middle arc line (27) is provided with a fourth segment point (271), the chord length (25) is provided with a third segment point (251), the third segment point The second connecting line (28) between (251) and the fourth segment point (271) is the maximum relative curvature of the grille blade, and the second connecting line (28) is the chord length (25) 0.02-0.04 times. 4. A grille blade for a vehicle according to claim 3, characterized in that, the distance from the leading edge (21) to the second connecting line (28) is the chord length (25) 0.4-0.6 times. 5. A grille blade for a vehicle according to claim 2, characterized in that the grille blade is provided with a mounting hole, and the mounting hole is provided in the middle of the first connecting line (26) . 6. An air intake grille, characterized in that it comprises a fixing frame (10) and a grille assembly, wherein the grille assembly comprises a rotating shaft (30) and the grille for a vehicle according to any one of claims 1 to 5 The grille blade, the fixing frame (10) includes an air inlet and an air outlet, the air inlet and the air outlet are connected through an air duct, and one end of the rotating shaft (30) is connected to the fixing frame (10) One side of the rotating shaft (30) is fixedly connected with the other side of the fixing frame (10) after passing through the mounting hole of the grille blade, and the grille blade is located in the windshield. The front edge (21) of the grille blade faces the air inlet, and the rear edge (22) of the grille blade faces the air outlet. 7 . The air intake grill according to claim 6 , wherein the number of the grill components is multiple, and the multiple grill components are evenly arranged in the air duct, and each of the grill components is uniformly arranged. 8 . The rotation axes of the grill assembly are parallel to each other. 8 . The air intake grill according to claim 7 , wherein the distance between the rotating shafts ( 30 ) of two adjacent grill assemblies is less than or equal to the chord length of the grill blades, and the The distance between the rotating shaft (30) and the air outlet is greater than the chord length of the grille blades. 9 . The air intake grill according to claim 6 , further comprising a connecting rod, wherein the connecting rod is used to link the grille vanes. 10 . 10. A vehicle, characterized by comprising the air intake grille according to any one of claims 6 to 9.

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