CN111546876A

CN111546876A - Grille blade for vehicle, air inlet grille and vehicle

Info

Publication number: CN111546876A
Application number: CN202010238500.4A
Authority: CN
Inventors: 徐鹏辉; 周华彬
Original assignee: Zhejiang Geely Holding Group Co Ltd; Ningbo Geely Automobile Research and Development Co Ltd
Current assignee: Wuhan Lotus Cars Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2020-08-18

Abstract

The invention provides a grid blade for a vehicle, wherein the cross section of the grid blade is of an airfoil structure, the airfoil structure comprises a front edge, a rear edge, a first molded line, a second molded line and a chord length, the front ends of the first molded line and the second molded line are connected with the front edge, the rear ends of the first molded line and the second molded line are connected with the rear edge, and the chord length is the distance from the front edge to the rear edge; a first section point is arranged on the first molded line, a second section point is arranged on the second molded line, a first connecting line of the first section point and the second section point is the maximum thickness of the grid blade, and the first connecting line is 0.07-0.11 times of the chord length; on the basis, the invention also provides an air inlet grille and a vehicle; the cross section of the grid blade provided by the invention has an airfoil structure, so that the grid blade is more in line with aerodynamics, has good shunting and guiding effects, and can effectively avoid eddy current dissipation; the heat dissipation effect to the cabin is improved, and the heat management performance of the whole cabin is greatly improved.

Description

Grille blade for vehicle, air inlet grille and vehicle

Technical Field

The invention relates to the technical field of automobile part manufacturing, in particular to a grille blade, an air inlet grille and a vehicle.

Background

With the continuous development of the automobile industry, the increasing severity of the problems of global environmental pollution, energy exhaustion and the like, new energy-powered vehicles rapidly grow and are likely to replace traditional fuel-oil-type vehicles in the near future. Therefore, the research on various performances of the new energy power vehicle is particularly important, and particularly the research on the thermal management system of the whole vehicle.

New energy powered vehicle thermal management systems are typically equipped with active air intake grilles. The air-inlet grille is arranged in front of an engine of a vehicle and plays a role in providing air inlet and heat dissipation for the engine: in hot seasons, the active air inlet grille is opened, and the maximum heat dissipation power can be given to the engine when the vehicle is started; in cold seasons, the air inlet grille is closed to prevent cold air from entering, so that the temperature rise of engine oil of an engine and a transmission is accelerated, and a vehicle can enter a better working state more quickly; and the heating effect when the warm air function is used in winter can be improved.

However, in the prior art, the grille blades usually have a regular shape structure, and when the grille blades are in a fully opened state, the horizontal inlet airflow can lead out the horizontal outlet airflow after passing through the grille blades with regular shapes, so as to provide good heat dissipation for the engine; however, when the grille blades are not fully opened, the horizontal air inlet flow can generate three air outlet flows, namely (1) horizontal air outlet flow, (2) inclined air outlet flow along the opening angle of the grille blades and (3) turbulent flow, and the turbulent flow causes poor flow guiding effect and low heat management efficiency of the whole vehicle. If the air intake demand of the same heat dispersion can be satisfied, then need be equipped with the grid air inlet opening that has a bigger area, and then influence whole car windage, cause adverse effect to the continuation of the journey.

In view of the above problems 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 intake wind resistance of the cabin of the whole vehicle, reduce the emission, and improve the dynamic property and the economical efficiency of the whole vehicle.

Disclosure of Invention

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

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

and a first section point is arranged on the first molded line, a second section point is arranged on the second molded line, a first connecting line of the first section point and the second section point is the maximum thickness of the grid blade, and the first connecting line is 0.07-0.11 times of the chord length.

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

Further, the airfoil structure further comprises a mean camber line connecting the leading edge and the trailing edge, a fourth segmentation point is arranged on the mean camber line, a third segmentation point is arranged on the chord length, a second connecting line of the third segmentation point and the fourth segmentation point is the maximum relative curvature of the grid blade, and the second connecting line is 0.02-0.04 times of the chord length.

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

Further, the grid blade is provided with a mounting hole, and the mounting hole is formed in the middle of the first connecting line.

The invention also provides an air inlet grille, which comprises a fixed frame and a grille component, wherein the grille component comprises a rotating shaft and grille blades in the technical scheme, the fixed frame comprises an air inlet and an air outlet, the air inlet is communicated with the air outlet through an air duct, one end of the rotating shaft is fixedly connected with one side of the fixed frame, the other end of the rotating shaft penetrates through a mounting hole of the grille blades and is fixedly connected with the other side of the fixed frame, the grille blades are positioned in the air duct and can rotate on the rotating shaft, the front edges of the grille blades face the air inlet, and the rear edges of the grille blades face the air outlet.

Specifically, the number of the grid assemblies is multiple, the multiple grid assemblies are uniformly distributed in the air duct, and rotating shafts of the grid assemblies are parallel to each other.

Specifically, the distance between the rotating shafts of two adjacent grating components is smaller than or equal to the chord length of the grating blades, and the distance between the rotating shaft and the air outlet is larger than the chord length of the grating blades.

Further, the grille blade comprises a connecting rod, and the connecting rod is used for linking the grille blade.

The invention protects a vehicle comprising the air intake grille in the technical scheme.

Due to the technical scheme, the invention has the following beneficial effects:

the cross section of the grille blade for the vehicle provided by the invention is provided with an airfoil structure, so that the grille blade is more in accordance with aerodynamics; the slim design of the trailing edge portion of the grille blade 20 can effectively avoid eddy current dissipation. The air inlet grille using the grille blades not only reduces the wind resistance when airflow flows through, improves the aerodynamic performance and power consumption economy of the whole vehicle, but also has good shunting and guiding effects, can enable the airflow at the air outlet of the air inlet grille to effectively act on the front end cooling module of the engine room, improves the heat dissipation of the engine room, and greatly improves the heat management performance of the engine room of the whole vehicle.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic view of a prior art intake grill;

FIG. 2 is a cross-sectional view of a grille blade for a vehicle provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an intake grill according to an embodiment of the present invention;

FIG. 4 is a flow guiding simulation diagram of the air intake grille under different working conditions.

In the figure: 10-a fixed frame, 20-a grid blade, 21-a front edge, 22-a rear edge, 23-a first molded line, 231-a first section point, 24-a second molded line, 241-a second section point, 25-a chord length, 251-a third section point, 26-a first connecting line, 27-a middle arc line, 271-a fourth section point, 28-a second connecting line and 30-a rotating shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the 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 in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "front", "rear", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present invention; the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

As shown in fig. 1, which is a schematic structural diagram of an air intake grille in the prior art, when a grille blade in the prior art is in a state of not being fully opened, a horizontal intake airflow may generate three partial exhaust airflows, that is, (1) a horizontal exhaust airflow, (2) an oblique exhaust airflow along an opening angle of the grille blade, and (3) a turbulent airflow.

Example 1

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

the first molded line 23 is provided with a first section point 231, the second molded line 24 is provided with a second section point 241, a first connecting line 26 between the first section point 231 and the second section point 241 is the maximum thickness of the grid blade, the first connecting line 26 is 0.07-0.11 times of the chord length 25, and the shortest distance from the front edge 21 to the first connecting line 26 is 0.2-0.3 times of the chord length 25.

In the present specification, the cross section of the grille blade 20 refers to a section perpendicular to the longitudinal direction of the grille blade 20, and the first line 26 is perpendicular to the chord length 25.

The airfoil structure further comprises a camber line 27 connecting the leading edge 21 and the trailing edge 22, a third section point is arranged on the chord length 25, a fourth section point 271 is arranged on the camber line 27, a second connecting line 28 of the third section point 251 and the fourth section point 271 is the maximum relative camber of the grille blade, and the second connecting line 28 is 0.02-0.04 times of the chord length 25; the shortest distance from the leading edge 21 to the second line 28 is 0.4-0.6 times the chord length 25.

It should be noted that in the embodiment of the present specification, the distance between the first mold line 21 and the second mold line 22 is the thickness of the grid blade 20, and there is a maximum value of the thickness of the grid blade 20 at the first connecting line 26; the camber line of the wing profile structure is a curve formed by connecting the midpoints of connecting lines of the upper camber line and the lower camber line of the wing profile parallel to the y axis after a rectangular coordinate system is established by taking the front edge as the origin and taking the chord length as the horizontal axis, and is used for representing the bending degree of the wing profile; the distance between the mean camber line 27 and the chord length 25 is the relative camber of the grille blade, there being a maximum of the relative camber of the grille blade at the second line 28; therefore, by determining the length proportional relationship between the first and second connecting

lines

26 and 28 and the chord length 25, and the proportional relationship between the distances from the first and second connecting

lines

26 and 28 to the leading edge 21 and the chord length 25, respectively, the profile characteristics 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 grille blade 20 at the front edge 21 is small, so that the airflow passing through the grille blade 20 can better adhere to the surface of the grille blade, and the eddy current generated by the airflow separation in advance is avoided, thereby avoiding the energy loss of the eddy current; the trailing edge 22 of the airfoil structure is thinned to enable the air flow passing through the trailing edge to be rapidly separated, inhibit the generation of vortex and enable the air flow to pass more smoothly.

The grille blade 20 is provided with a mounting hole which is provided in the middle of the first connecting line 26; preferably, the mounting hole is provided at the midpoint of the first wire 26.

As shown in fig. 3, an embodiment of the present disclosure further provides an air intake grille, including a fixing frame 10 and a grille assembly, where the fixing frame 10 includes an air inlet, an air outlet, and an air duct, and the air inlet and the air outlet are communicated through the air duct; the grille component comprises the 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, the other end of the rotating shaft 30 penetrates through the mounting holes of the grille blades 20 and is fixedly connected with the other side of the fixing frame 10, and the grille blades 20 are located in the air channel and can rotate relative to the rotating shaft 30. The front edge 21 of the grille blade 20 faces the air inlet and the rear edge 22 of the grille blade 20 faces the air outlet.

Since the mounting hole is located at the middle of the first line of the grill vane 20, i.e., the middle of the position where the rotary shaft 30 passes through the maximum thickness of the grill vane 20, where the torque is minimum, the torque required for the rotation of the grill vane can be reduced, and the flexibility of the rotation of the grill vane can be improved.

The number of grid assembly is a plurality of, and a plurality of grid assembly evenly arrange in the wind channel, and each grid assembly's pivot 30 is parallel to each other. The air intake grille shown in fig. 3 is provided with two grille members which are perpendicular to the air passage and are arranged up and down in the air passage.

The distance between the rotating shafts 30 of two adjacent grid assemblies is less than or equal to the chord length 25 of the grid blades 20, the distance from the rotating shafts 30 to the air outlet is greater than the chord length 25 of the grid blades 20, and the distance from the rotating shafts 30 to the air inlet is greater than the chord length 25 of the grid blades 20; therefore, the grille blades 20 are entirely located in the air duct, and as the grille blades 20 rotate, when the grille blades 20 rotate from a state parallel to the air duct to a state perpendicular to the air duct, the adjacent grille blades 20 can be connected in a tail-in manner to close the air duct. The grill vanes 20 are rotatably coupled to the rotary shaft 30, and the grill vanes 20 are rotated by an angle ranging from 0 ° to 90 °. The angle of rotation of the grille blades 20 refers to the angle between the grille blades and the incoming airflow.

The intake grill further includes a link connected to the grill blades 20 of each grill member for linking all the grill blades 20. The link is also connected with a controller for controlling the opening and closing of the grill blades 20 and adjusting the rotation angle of the grill blades 20.

The air intake grille provided by the embodiment of the present specification, wherein the grille blades are capable of rotating, when the rotation angle is 0 °, as shown in fig. 3(a), the front edges 21 of the grille blades 20 face the air inlet, the rear edges 22 of the grille blades 20 face the air outlet, the chord lengths 25 of the grille blades are parallel to the air duct, and the grille blades are in a fully opened state, and are capable of giving the maximum heat dissipation power to the engine when the vehicle is started; when there is an included angle between the grille blade and the intake airflow, that is, as shown in fig. 3(b), after passing through the grille blade, the airflow at the rear edge 22 is quickly separated, and can pass through more smoothly without being accompanied by the generation of vortex; in a severe cold winter, the rotation angle of the grille blades is 90 degrees, the grille blades rotate to shield the air inlet, so that cold air is prevented from entering an engine room, the temperature rise of an engine and a gearbox is facilitated, and a vehicle can enter a better working state more quickly; and the heating effect when the warm air function is used in winter can be improved.

In the air intake grille provided in the present embodiment, the frame 10 has an air inlet and an air outlet with sizes of 0.6m × 0.06m, the air duct length is 0.16m, the size of the grille blade 20 is selected and the length of the chord length 25 of the grille blade is set to be 0.06m according to the size of the frame, and the following is set according to the proportional relationship between the chord length 25 and the first and second connecting lines 26 and 28:

the length of the first line 26 is 0.0044m, the distance from the leading edge 21 to the first line is 0.012m, the length of the second line 28 is 0.0132m, and the distance from the leading edge to the second line is 0.03 m. And carrying out flow guiding simulation analysis on the air inlet grille with the size characteristic.

The embodiment of the specification further provides a vehicle, the vehicle comprises the air inlet grille provided by the technical scheme, the air inlet grille is arranged at the front end of the vehicle, and an air outlet of the air inlet grille is communicated with an engine cabin.

As shown in fig. 4(a) to 4(f), the flow guiding simulation diagrams of the vehicle mounted with the air intake grille are operated at different vehicle speeds and at different turning angles of the grille blades 20 of the air intake grille, wherein the connecting lines with arrows in the diagrams represent the airflow, and the shades of the colors represent the magnitude of the speed.

Fig. 4(a) is a flow guiding diagram when the vehicle speed is 30km/h and the rotation angle of the grille blade is 0 °, at this time, the grille blade 20 is in a fully opened state, the grille blade 20 is parallel to the intake airflow, and since the flow area changes with the airfoil structure, the airflow is accelerated when passing through the grille blade, that is, the color of the deep color part in the diagram (a) is deep, and the intake airflow passes through the grille blade 20 with a smooth outer contour, and then the horizontal outlet airflow is generated.

When the vehicle speed is 30km/h and the rotation angle of the grille blade 20 is 15 °, that is, the windward angle between the grille blade 20 and the inlet airflow is 15 °, as shown in fig. 4(b), the horizontal inlet airflow passes through the grille blade 20 to generate the outlet airflow which is inclined but still parallel to each other, and the inclination angle of the outlet airflow is substantially the same as the rotation angle of the grille blade 20. Compared with the prior art, the grille blade provided by the application can closely adhere to the surface of the grille blade 20 in the process of passing through the grille blade 20 under the condition that the vehicle speed is 30km/h and the rotation angle of the grille blade 20 is 15 degrees, and no turbulence is generated.

FIG. 4(c) is a flow guiding simulation image when the vehicle speed is 60km/h and the grille blades are fully opened; and (e) is a flow guiding simulation image when the vehicle speed is 100km/h and the grille blades are completely opened, and the grille blades 20 can be seen to have good flow dividing and guiding effects on the airflow.

Fig. 4(d) is a flow guiding simulation image when the vehicle speed is 60km/h and the windward angle between the grille blade 20 and the intake airflow is 15 °, and fig. 4(f) is a flow guiding simulation image when the vehicle speed is 100km/h and the windward angle between the grille blade 20 and the intake airflow is 15 °, under these two conditions, although the airflow at the rear edge of the grille blade is shunted, no turbulence is generated, so that when the vehicle runs at a medium-high speed state, a good heat dissipation effect can be provided for the engine, and the thermal management performance of the engine room is enhanced.

The grille blade for the vehicle provided by the embodiment of the specification has the advantages that the cross section of the grille blade is of an airfoil structure, and the grille blade is more aerodynamic; the slim design of the trailing edge portion of the grille blade 20 can effectively avoid eddy current dissipation. The air inlet grille using the grille blades not only reduces the wind resistance when airflow flows through, improves the aerodynamic performance and power consumption economy of the whole vehicle, but also has good shunting and guiding effects, can enable the airflow at the air outlet of the air inlet grille to effectively act on the front end cooling module of the engine room, improves the heat dissipation of the engine room, and greatly improves the heat management performance of the engine room of the whole vehicle.

In addition, the grille blades and the air inlet grille for the vehicle provided by the embodiment of the specification can reduce the size of the air inlet grille on the premise of the same air inlet amount demand/heat exchange amount, are beneficial to reducing the wind resistance of the whole vehicle (especially the wind resistance of the vehicle during high-speed running), and greatly reduce the energy consumption of the whole vehicle. Furthermore, the endurance performance of the whole vehicle can be effectively improved.

Example 2

The present embodiment provides a grille blade and an intake grille for a vehicle, which are different from embodiment 1 in that the chord length of the grille blade is 0.06m, the first connecting line 26 is 0.07 times of the chord length, that is, the length of the first connecting line 26 is 0.0042 m; the distance from the leading edge 21 to the first line 26 is 0.25 times the chord length 25, i.e. the distance from the leading edge 21 to the first line 26 is 0.015 m;

the length of the second connecting line 28 is 0.02 times of the chord length, namely the length of the second connecting line 28 is 0.0012 m; the distance of the leading edge 21 to the second line 28 is 0.4 times the chord length, i.e. the distance of the leading edge 21 to the second line 28 is 0.024 m.

Example 3

The present embodiment provides a grille blade and an intake grille for a vehicle, which are different from embodiment 1 in that the chord length of the grille blade is 0.06m, the first connecting line 26 is 0.11 times the chord length, that is, the length of the first connecting line 26 is 0.0066 m; the distance from the leading edge 21 to the first connecting line 26 is 0.3 times of the chord length 25, namely the distance from the leading edge 21 to the first connecting line 26 is 0.018 m;

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

While the invention has been described with reference to specific embodiments, it will be appreciated by those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the invention can be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A grille blade for a vehicle, characterized in that the grille blade has an airfoil shaped cross section, the airfoil shaped cross section comprises a leading edge (21), a trailing edge (22), a first profile (23), a second profile (24) and a chord length (25), the leading ends of the first profile (23) and the second profile (24) are connected with the leading edge (21), the trailing ends of the first profile (23) and the second profile (24) are connected with the trailing edge (22), and the chord length (25) is the distance from the leading edge (21) to the trailing edge (22);

a first section point (231) is arranged on the first molded line (23), a second section point (241) is arranged on the second molded line (24), a first connecting line (26) of the first section point (231) and the second section point (241) is the maximum thickness of the grid blade, and the first connecting line (26) is 0.07-0.11 times of the chord length (25).

2. A grille blade for a vehicle according to claim 1 wherein the distance of the leading edge (21) to the first line (26) is 0.2-0.3 times the chord length (25).

3. A grille blade for a vehicle in accordance with claim 2 wherein the airfoil structure further comprises a mean camber line (27) connecting the leading edge (21) and the trailing edge (22), a fourth segmentation point (271) being provided on the mean camber line (27), a third segmentation point (251) being provided on the chord length (25), a second line (28) connecting the third segmentation point (251) and the fourth segmentation point (271) being a maximum relative camber of the grille blade, the second line (28) being 0.02-0.04 times the chord length (25).

4. A grille blade for a vehicle according to claim 3 wherein the distance from the leading edge (21) to the second line (28) is 0.4-0.6 times the chord length (25).

5. A grille blade for a vehicle according to claim 2 wherein the grille blade is provided with a mounting hole provided at a middle portion of the first connecting line (26).

6. An air inlet grille, characterized by, including mount (10) and grille subassembly, the grille subassembly includes pivot (30) and the grille vane for vehicle of any one of claims 1-5, mount (10) includes air intake and air outlet, the air intake with the air outlet is linked together through the wind channel, the one end of pivot (30) with one side fixed connection of mount (10), the other end of pivot (30) pass behind the mounting hole of grille vane with the opposite side fixed connection of mount (10), grille vane is located in the wind channel and can rotate in the pivot, grille vane's leading edge (21) is towards the air intake, grille vane's trailing edge (22) is towards the air outlet.

7. The air intake grille of claim 6, wherein the number of the grille members is plural, the plural grille members are uniformly arranged in the air duct, and the rotation axes of the grille members are parallel to each other.

8. An air inlet grille according to claim 7 characterized in that the distance between the rotating shafts (30) of two adjacent grille components is smaller than or equal to the chord length of the grille blades, and the distance between the rotating shafts (30) and the air outlet is larger than the chord length of the grille blades.

9. An air intake grille as claimed in claim 6 further comprising a linkage for linking said grille blades.

10. A vehicle characterized by comprising an air intake grille as claimed in any one of claims 6 to 9.