CN114619859B

CN114619859B - Automobile external water cutter and automobile

Info

Publication number: CN114619859B
Application number: CN202210139213.7A
Authority: CN
Inventors: 杨蒙; 孙作奎; 张紫广; 刘浩; 张永仁
Original assignee: Lantu Automobile Technology Co Ltd
Current assignee: Lantu Automobile Technology Co Ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2023-08-04
Anticipated expiration: 2042-02-15
Also published as: CN114619859A

Abstract

The invention relates to the technical field of automobiles, in particular to an automobile external water cutter and an automobile. The utility model provides an automobile outer water is cut, install on automobile back door panel beating, the inside that outer water was cut is equipped with the runner, the runner has air inlet and air outlet, air inlet sets up and cuts the tip that is close to B post plaque at outer water, air outlet sets up the top that cuts at outer water, when the automobile is gone, receive the effect of automobile the place ahead air current flow and runner both ends pressure difference, the air flow flows in by the air inlet of runner, and flow from the air outlet of runner with a certain velocity vector, this partial air current and the vortex of B post plaque trailing edge drop the air current interact, the uniformity impact of the air current that drops vortex to the interior cavity of car is disturbed, thereby reach the effect that reduces interior wind and vibration noise of car, and outer water cuts the conventional setting of car among the prior art, cut inside with the runner setting at outer water, can not influence the side molding of automobile body.

Description

Automobile external water cutter and automobile

Technical Field

The invention relates to the technical field of automobiles, in particular to an automobile external water cutter and an automobile.

Background

When the vehicle runs at a high speed, after the window glass of the rear side door is independently opened, low-frequency hump-shaped ear pressing sound is generally generated in the vehicle, and the noise is generally within 20Hz due to low frequency, and the sound pressure level amplitude is larger and is generally larger than 120db, so that obvious uncomfortable feeling can be caused to passengers in the vehicle, even body pathological reactions such as tinnitus and the like are generated, and the noise is very necessary to be weakened and eliminated.

In the prior art, a raised shark fin-shaped structure is added on the surface of the B-pillar outer decorative plate to change consistency of shedding vortex generation of airflow, so that the impact of the shedding vortex flow on the interior of a vehicle is inconsistent, and wind vibration noise in the vehicle is reduced. However, the technical scheme has the following disadvantages: on one hand, the characteristics of the molding surface are changed, and the overall molding effect of the side surface of the vehicle door is affected; on the other hand, considering the limiting conditions on modeling and part forming, the number of the raised shark fin-shaped structures cannot be too large, and is generally smaller than 3, so that the effect of optimizing wind vibration noise in the vehicle is affected.

Disclosure of Invention

The application provides an automobile external water is cut and car, has solved among the prior art the technical scheme of noise abatement can influence the holistic molding effect of door side, and to the limited technical problem of noise's reduction effect.

In one aspect, the application provides an automobile external water is cut, installs on automobile back door panel beating, the inside that external water was cut is equipped with the runner, the runner has air inlet and air outlet, air inlet with the air outlet sets up from preceding back interval along the length direction of automobile, air inlet sets up external water is cut and is close to the tip of B post plaque, air outlet sets up external water is cut the top.

In some embodiments, a separation layer is disposed within the flow channel to divide at least the flow channel into upper and lower portions.

In some embodiments, the separator layer is wavy.

In some embodiments, the length of the separation layer is less than the length of the flow channel, and one end of the separation layer is disposed proximate the airflow outlet, and the other end of the separation layer is spaced from the airflow inlet.

In some embodiments, the length of the flow channel is 100-150mm.

In some embodiments, the separator layer has a length of 60-90mm.

In some embodiments, the distance between the highest point of the separation layer and the top of the flow channel, and the distance between the lowest point of the separation layer and the bottom of the flow channel are all 1-2mm.

In some embodiments, the airflow inlet and the airflow outlet are kidney-shaped, and the airflow inlet and the airflow outlet are 6-10mm in length and 2-5mm in width.

In some embodiments, the separator layer is integrally formed with the flow channel.

In another aspect, the present application provides an automobile comprising the automobile exterior water cutter described above.

The beneficial effects of the application are as follows:

the utility model provides an automobile outer water cuts and car has set up the runner in the outer water of automobile back door cuts, when the automobile was gone, receives the effect of automobile the place ahead air current flow and runner both ends pressure difference, and the air current flows in by the air current entry of runner to flow from the air current export of runner with a certain velocity vector, this partial air current and the whirlpool air current interact that drops of B post plaque trailing edge, the effect of wind vibration noise in the reduction car is reached to the uniformity impact of the whirlpool air current that weakens to the car cavity in, and outer water cuts the conventional setting of car among the prior art, cuts inside with the runner setting at outer water, can not influence the side molding of automobile body.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention.

Fig. 1 is a partial structural view of an automobile provided in the present embodiment;

fig. 2 is a schematic structural diagram of the external water cutter according to the present embodiment;

FIG. 3 is a schematic view of the flow channel according to the present embodiment;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a cross-sectional view of FIG. 3;

FIG. 6 is a flow channel velocity simulation result chart provided in the present embodiment;

FIG. 7 is a flow pressure wave diagram of the flow outlet provided by the present embodiment;

FIG. 8 is a graph of noise contrast at the measurement points before and after optimization.

Reference numerals illustrate:

the device comprises a 100-B column decoration plate, a 110-C column decoration plate, 120-sheet metal, 200-external water cutting, 300-flow channels, 310-air flow inlets, 320-air flow outlets and 400-separation layers.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

When the rear window of the vehicle is opened, the interior cavity is in air flow communication with the exterior of the vehicle, thereby creating a Helmholtz resonator-like structure. When the vehicle runs at a high speed, air flow from the front of the vehicle flows through the side surface of the vehicle, and at the rear edge of the outer decorative plate of the rear door B column, the air flow loses an attaching surface to generate air flow separation and vortex shedding, so that continuous air flow impact disturbance is generated on a cavity in the vehicle, and low-frequency hump sound is generated in the vehicle; when the vortex shedding frequency of the airflow is consistent with the Helmholtz resonance frequency of the cavity in the vehicle along with the change of the vehicle speed, the low-frequency wind vibration noise in the vehicle is maximum, so that obvious uncomfortable feeling can be caused to passengers in the vehicle, and even body pathological reactions such as tinnitus and the like can be generated.

Some automobile manufacturers in the prior art take the following methods: the raised shark fin-shaped structure is added on the surface of the B column ornamental plate, so that the consistency of the shedding vortex of the airflow is changed, the impact of the shedding vortex airflow on the interior of the vehicle is inconsistent, and the wind vibration noise in the vehicle is reduced, but the technical scheme has the following defects: on one hand, the characteristics of the molding surface are changed, and the overall molding effect is affected; on the other hand, considering the limiting conditions on modeling and part forming, the number of the raised shark fin-shaped structures cannot be too large, and is generally smaller than 3, so that the effect of optimizing wind vibration noise in the vehicle is affected.

Still other automobile manufacturers choose to forgo optimization of wind noise of the rear side door window in order to avoid influencing the automobile model, and do nothing to do with the noise, but do operation method training related to avoiding the sound for customers in the process of selling the automobile, for example: opening the rear side door window glass simultaneously with opening the front side door window glass reduces the chance of this problem, but this practice actually limits the customer's vehicle scene.

Based on this, this application embodiment provides an automobile external water cut, and fig. 1 is a partial structure diagram of the automobile that this embodiment provided, combines fig. 1, and the automobile external water cut 200 of this application embodiment is installed on automobile back door panel beating 120, and both ends respectively with B post plaque 100, the laminating of C post plaque 110 set up, and B post plaque 100, C post plaque 110 are the current conventional structure of car, and no more detailed here.

Fig. 2 is a schematic structural diagram of the external water cutter according to the present embodiment, and fig. 3 is a schematic structural diagram of the flow channel 300 according to the present embodiment, in which the flow channel 300 is disposed inside the external water cutter 200. Referring to fig. 2 and 3, the flow path 300 has an air inlet 310 and an air outlet 320, and the air inlet 310 and the air outlet 320 are spaced from each other from front to back along the length direction of the automobile, so that the air inlet 310 is located at the front and the air outlet 320 is located at the rear when the automobile is running; the air inlet 310 is disposed on the end surface of the outer water cut 200 near the B-pillar trim 100, and the air outlet 320 is disposed on the top of the outer water cut 200, i.e., the center line of the air inlet 310 is disposed horizontally, and the center line of the air outlet 320 is disposed vertically.

When the automobile runs, the airflow near the side door flows approximately horizontally and is influenced by the airflow in front of the automobile and the pressure difference at two ends of the runner 300, the airflow flows in from the airflow inlet 310 of the runner 300 and flows out from the airflow outlet 320 of the runner 300 at a certain speed vector, and the airflow outlet 320 is arranged at the top of the external water cut 200, so that the part of airflow interacts with vortex shedding airflow at the rear edge of the B-pillar trim 100 to disturb or weaken the consistent impact of the airflow shedding vortex on the cavity in the automobile, thereby reducing the wind vibration noise in the automobile, and the runner 300 is arranged inside the external water cut 200 and does not influence the side surface modeling of the automobile body because the external water cut 200 is arranged at the conventional arrangement of the automobile in the prior art.

The automobile external water cutter 200 in the prior art is used for cutting off water drops, water mist and dust on the surface of glass when lifting window glass, and simultaneously plays an attractive effect.

Because the airflow flowing out from the airflow outlet 320 needs to interact with the vortex shedding airflow at the rear edge of the B-pillar trim 100, too long or too short a distance between the airflow outlet 320 and the B-pillar trim 100 can reduce the effect of the outlet airflow to damage the vortex shedding structure of the B-pillar outer trim, i.e., the distance between the airflow outlet 320 and the B-pillar trim 100 is set as a key point in this solution. Since the air inlet 310 is disposed on the end surface of the outer water cut 200 close to the B-pillar trim 100, the distance between the air outlet 320 and the B-pillar trim 100 can be set by setting the length L1 of the flow channel 300. Specifically, the length L1 of the flow path 300 in this embodiment may be 100-150mm.

The shape and size of the air inlet 310 and the air outlet 320 may be the same, fig. 4 is a cross-sectional view A-A of fig. 3, and in combination with fig. 4, the air inlet 310 and the air outlet 320 may each have a waist shape, the length D1 of the air inlet 310 and the air outlet 320 may be 6-10mm, and the width D2 may be 2-5mm.

Fig. 5 is a cross-sectional view of fig. 3, and in combination with fig. 5, a separation layer 400 is disposed in the flow channel 300 in this embodiment to divide at least the flow channel 300 into an upper portion and a lower portion. The layered design in the flow channel 300 can ensure that the airflow flowing out from the airflow outlet 320 has enough turbulent kinetic energy to the greatest extent, and the turbulent kinetic energy of the outlet airflow determines the disturbance of the outlet airflow to the wind vibration airflow in the vehicle, and also determines the weakening effect of the wind vibration noise in the vehicle. It is understood that, to improve the structural integration, the separation layer 400 is integrally formed with the flow channel 300 in this embodiment.

Referring to fig. 5, in the present embodiment, the separation layer 400 is in a wavy shape, i.e. there is a narrower area between the separation layer 400 and the inner wall of the flow channel 300, so as to ensure that the velocity components of the airflow flowing in the vertical direction of the upper and lower portions are always kept in a larger value state when the airflow flows through the flow channel 300, and when the airflow passes through the narrower area in the flow channel 300, the flow velocity of the airflow is amplified, so that the turbulent energy of the outlet airflow is further increased. In particular, in this embodiment, the distance between the highest point of the separation layer 400 and the top wall of the flow channel 300, and the distance C between the lowest point of the separation layer 400 and the bottom wall of the flow channel 300 may be 1-2mm, i.e. the width of the narrower region in the upper and lower portions of the flow channel 300 is 1-2mm.

Further, in this embodiment, the length L2 of the separation layer 400 is smaller than the length L1 of the flow channel 300, and one end of the separation layer 400 is disposed near the air flow outlet 320, and the other end of the separation layer 400 has a distance from the air flow inlet 310, i.e. the first section of the flow channel 300 is not provided with the separation layer 400, so as to ensure that the air flow with sufficient flow rate enters the flow channel 300, and form a certain initial flow velocity, so that the disturbance effect of the air flow flowing to the rear edge of the B column is strongest. In particular, in this embodiment, the length L2 of the spacer layer 400 may be 60-90mm.

It should be noted that, in the present embodiment, various design parameters related to the flow channel 300 are calculated by the computer-aided simulation flow field, and the above design parameters are adopted, so that the optimization effect of wind vibration noise in the vehicle is better.

In this example, the length L1 of the flow path is 126.9mm, the length L2 of the separation layer is 91mm, the distance C between the bottommost point of the separation layer 400 and the bottom wall of the flow path 300 is 1.5mm, the lengths D1 of the air inlet 310 and the air outlet 320 are 8mm, and the width D2 is 4mm.

Fig. 6 is a flow field velocity simulation result chart of the flow channel provided in this embodiment, fig. 7 is a flow pressure wave chart of the air flow outlet provided in this embodiment, and in combination with fig. 6 and 7, the inlet flow velocity of the air flow is 20m/s, the outlet flow velocity is 64.3m/s, that is, the flow velocity of the air flow at the air flow outlet 320 is amplified by more than 3 times relative to the flow velocity of the air flow at the air flow inlet 310 through the turbulence enhancing effect of the flow channel 300. And meanwhile, periodic turbulence pressure disturbance is generated at the airflow outlet 320, so that the airflow shedding vortex structure of the directional and energy-consuming B-pillar trim panel 100 is achieved, and the aim of reducing wind vibration noise in a vehicle is fulfilled.

In order to more intuitively demonstrate the noise reduction effect of the flow channel 300 in the present embodiment, the present embodiment further arranges measurement points at the rear passenger position of the automobile to compare the noise at the measurement point in the prior art with the noise at the measurement point at the rear of the added flow channel 300, fig. 8 is a noise comparison chart at the measurement point before and after optimization, the horizontal axis is frequency, and the vertical axis is sound pressure level, that is, represents the noise in the automobile, and as can be seen from fig. 8, after the technical scheme of the present embodiment is adopted, the noise reduction effect of wind vibration noise in the automobile is obvious.

The embodiment of the application also provides an automobile, which comprises the automobile outside water cutter 200. The automobile in the prior art is provided with the outer water cutter 200 on the door sheet metal 120 so as to cut off water drops, water mist and dust on the surface of the glass when the window glass is lifted, and simultaneously has an attractive effect, the automobile of the embodiment of the application skillfully and flexibly uses the structure of the outer water cutter 200 of the automobile, and the air vibration noise in the automobile is reduced by utilizing the influence of air flow through arranging the flow channel 300 in the automobile, so that the automobile is simple in structure and remarkable in effect.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The automobile outer water cutter is arranged on a metal plate of a rear door of an automobile, and is characterized in that a runner is arranged in the outer water cutter and is provided with an air flow inlet and an air flow outlet, the air flow inlet and the air flow outlet are arranged at intervals from front to back along the length direction of the automobile, the air flow inlet is arranged at the end part of the outer water cutter, which is close to a B column decorative plate, and the air flow outlet is arranged at the top of the outer water cutter;

the flow channel is internally provided with a separation layer so as to divide at least the flow channel into an upper part and a lower part, and the separation layer is wavy.

2. The automobile exterior water cutter according to claim 1, wherein the length of the separation layer is smaller than the length of the flow passage, and one end of the separation layer is disposed near the air flow outlet, and the other end of the separation layer is spaced from the air flow inlet.

3. The automobile exterior water cutter according to claim 1, wherein the length of the flow passage is 100-150mm.

4. The automotive exterior water cutter according to claim 3, wherein the separator has a length of 60 to 90mm.

5. The automobile exterior water cutter according to claim 4, wherein the distance between the highest point of the separation layer and the top of the flow channel and the distance between the lowest point of the separation layer and the bottom of the flow channel are all 1-2mm.

6. The automobile exterior water cutter according to claim 4, wherein the air flow inlet and the air flow outlet are waist-shaped, and the length of the air flow inlet and the air flow outlet is 6-10mm and the width is 2-5mm.

7. The automotive exterior water cutter of claim 1, wherein the separation layer is integrally formed with the flow channel.

8. An automobile comprising the automobile exterior water cutter according to any one of claims 1 to 7.