CN114619859A

CN114619859A - Automobile outer water cutter and automobile

Info

Publication number: CN114619859A
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: 2022-06-14
Anticipated expiration: 2042-02-15
Also published as: CN114619859B

Abstract

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

Description

Automobile outer water cutter and automobile

Technical Field

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

Background

When a vehicle runs at a high speed, after the rear side door window glass is singly opened, low-frequency 'rumble' ear pressing sound is generally generated in the vehicle, and the noise is low in frequency, generally within 20Hz, and the amplitude of the sound pressure level is large, generally greater than 120db, so that obvious discomfort can be caused to passengers in the vehicle, and physical and pathological reactions such as tinnitus can be generated, so that the noise is very necessary to be weakened and eliminated.

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

Disclosure of Invention

The application provides a car is surely reached to car extra income, has solved the technical scheme of noise elimination among the prior art and can influence the holistic molding effect in door side, and to the limited technical problem of reduction effect of noise.

On the one hand, this application provides an automobile extra income is cut, installs on car back door panel beating, the inside that the extra income was cut is equipped with the runner, the runner has airflow inlet and air outlet, airflow inlet with the air outlet sets up along the length direction from preceding backward interval of car, airflow inlet sets up the extra income is cut the tip that is close to the B post plaque, air outlet sets up the top that the extra income is cut.

In some embodiments, a separation layer is disposed in the flow channel to divide at least a portion of the flow channel into an upper portion and a lower portion.

In some embodiments, the separation layer is wavy.

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

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

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

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 both 1-2 mm.

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

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

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

The beneficial effect of this application is as follows:

the application provides a car is cut to car extra income, the runner has been set up in the extra income of car back door is cut, when the car traveles, receive the effect that car the place ahead air current flows and runner both ends pressure difference, the air current flows in by the air current entry of runner, and flow out from the air current outlet of runner with a certain velocity vector, the air current interact that drops in this part air current and the vortex of B post plaque rear edge, it is in disorder, the air current that weakens the vortex that drops strikes to the uniformity of cavity in the car, thereby reach the effect that reduces wind vibration noise in the car, and the extra income is cut the conventional setting of car among the prior art, cut inside the runner setting at extra income, 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 used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.

Fig. 1 is a partial structural view of an automobile according to the present embodiment;

fig. 2 is a schematic structural view of the external water jet cutter provided in this embodiment;

fig. 3 is a schematic structural diagram of the flow channel provided in this embodiment;

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

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

fig. 6 is a diagram of a simulation result of the flow channel speed provided in this embodiment;

FIG. 7 is a graph showing the pressure fluctuation of the airflow at the airflow outlet provided in the present embodiment;

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

Description of the reference numerals:

100-B column decorative plate, 110-C column decorative plate, 120-metal plate, 200-outer water cut, 300-flow channel, 310-airflow inlet, 320-airflow outlet and 400-separation layer.

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 making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

When the rear side window of the vehicle is opened, the cavity in the vehicle is communicated with the airflow outside the vehicle, and a structure similar to a Helmholtz resonant cavity can be formed. When a vehicle runs at a high speed, airflow in front of the vehicle flows through the side face of the vehicle, and the airflow loses an attaching face at the rear edge of the B-pillar outer decorative plate of the rear door, so that airflow separation and vortex shedding are generated, continuous airflow impact disturbance is generated on a cavity in the vehicle, and low-frequency 'rumble' sound is generated in the vehicle; along with the change of vehicle speed, when the vortex shedding frequency of the air current is consistent with the Helmholtz resonance frequency of the cavity in the vehicle, the low-frequency wind vibration noise in the vehicle is the largest, so that passengers in the vehicle can feel obvious discomfort and even generate physical pathological reactions such as tinnitus and the like.

The methods adopted by some automobile manufacturers in the prior art are as follows: the surface of the B-column decorative plate is additionally provided with a raised shark fin-shaped structure, so that the consistency of the shedding vortex of the airflow is changed, and the impact of the shedding vortex airflow on the interior of the vehicle is inconsistent, thereby weakening the wind vibration noise in the vehicle, but the technical scheme also has the following defects: on one hand, the characteristics of the modeling surface are changed, and the overall modeling effect is influenced; on the other hand, considering the limitation conditions on modeling and part forming, the number of the raised shark fin-shaped structures cannot be too large and is generally less than 3, so that the optimization effect of the shark fin-shaped structures on wind vibration noise in the vehicle is influenced.

Some automobile manufacturers choose to give up optimizing the wind vibration noise of the rear side door window in order to avoid influencing the automobile model, do not deal with the noise, and only carry out operation method training for avoiding the noise to a customer in the process of selling the automobile, for example: the rear side window glass is opened and simultaneously the front side window glass is opened, so that the probability of the problem is reduced, but the method actually limits the vehicle using scene of customers.

Based on this, this application embodiment provides an automobile outer water is cut, and fig. 1 is the local structure diagram of the automobile that this embodiment provided, combines fig. 1, and the automobile outer water of this application embodiment is cut 200 and is installed on automobile rear door panel beating 120, and both ends respectively with the laminating setting of B post plaque 100, C post plaque 110, B post plaque 100, C post plaque 110 are the current conventional structure of automobile, no longer describe herein.

Fig. 2 is a schematic structural diagram of the external water jet cutter provided in this embodiment, and fig. 3 is a schematic structural diagram of the flow channel 300 provided in this embodiment, the flow channel 300 is disposed inside the external water jet cutter 200. Referring to fig. 2 and 3, the flow channel 300 has an airflow inlet 310 and an airflow outlet 320, and the airflow inlet 310 and the airflow outlet 320 are spaced from front to back along the length direction of the vehicle, so that the airflow inlet 310 is in front and the airflow outlet 320 is in back when the vehicle is running; the air inlet 310 is arranged on the end face of the outer water jet cutter 200 close to the B-pillar trim panel 100, the air outlet 320 is arranged on the top of the outer water jet cutter 200, namely, the central line of the air inlet 310 is horizontally arranged, and the central line of the air outlet 320 is vertically arranged.

When the automobile runs, the airflow near the side door flows to the approximately horizontal direction, and under the action of the airflow in front of the automobile and the pressure difference between two ends of the flow channel 300, the airflow can flow in from the airflow inlet 310 of the flow channel 300 and flow out from the airflow outlet 320 of the flow channel 300 at a certain velocity vector, because the airflow outlet 320 is arranged at the top of the outer water cut 200, and the B-pillar trim 100 is arranged above the outer water cut 200, the part of the airflow interacts with the vortex shedding airflow at the rear edge of the B-pillar trim 100 to disturb or weaken the consistent impact of the shedding airflow on the cavity in the automobile, thereby achieving the effect of reducing the wind vibration noise in the automobile, and the outer water cut 200 is the conventional arrangement of the automobile in the prior art, and the flow channel 300 is arranged in the outer water cut 200, so that the side modeling of the automobile body cannot be influenced.

Automobile outside water among the prior art is cut 200 itself and is used for cutting off water droplet, water smoke and dust on the glass surface when lift car window glass, also plays pleasing to the eye effect simultaneously, and this application embodiment has utilized automobile outside water to cut 200's structure ingeniously, in a flexible way, through set up runner 300 in its inside, utilizes the influence of air current to reduce wind vibration noise in the car, simple structure, effect are showing.

Since the air flow from the air flow outlet 320 needs to interact with the vortex shedding air flow at the rear edge of the B-pillar garnish 100, too long or too short distance between the air flow outlet 320 and the B-pillar garnish 100 reduces the effect of the outlet air flow on destroying the air flow shedding vortex structure of the B-pillar garnish, i.e., the distance between the air flow outlet 320 and the B-pillar garnish 100 is set as the key point of the present solution. Since the air inlet 310 is provided on the end surface of the outer water cut 200 close to the B-pillar garnish 100, the length L1 of the flow passage 300 is set to set the distance between the air outlet 320 and the B-pillar garnish 100. Specifically, the length L1 of the flow channel 300 in the present embodiment may be 100-150 mm.

The airflow inlet 310 and the airflow outlet 320 may have the same shape and size, fig. 4 is a sectional view taken along a-a of fig. 3, and in conjunction with fig. 4, the airflow inlet 310 and the airflow outlet 320 may have a waist shape, and the airflow inlet 310 and the airflow outlet 320 may have a length D1 of 6-10mm and a width D2 of 2-5 mm.

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 separate at least a portion of 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 maximum extent, and the size of 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 the partition 400 is integrally formed with the flow channel 300 in this embodiment to improve structural integration.

Referring to fig. 5, the partition layer 400 in this embodiment is wavy, that is, there is a narrow area between the partition layer 400 and the inner wall of the flow channel 300, so as to ensure that the velocity components of the airflow in the vertical direction of the upper and lower portions are always kept in a large value state when the airflow passes through the flow channel 300, and when the airflow passes through the narrow area in the flow channel 300, the flow velocity of the airflow is amplified, so that the turbulence of the airflow at the outlet is further increased. Specifically, in the present 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 can be 1-2mm, i.e., the width of the narrower region in the upper and lower portions of the flow channel 300 is 1-2 mm.

Further, in the present embodiment, the length L2 of the separating layer 400 is smaller than the length L1 of the flow channel 300, one end of the separating layer 400 is disposed near the airflow outlet 320, and the other end of the separating layer 400 is spaced from the airflow inlet 310, i.e., the separating layer 400 is not disposed in the initial section of the flow channel 300, so as to ensure that the airflow with sufficient flow rate enters the flow channel 300 and form a certain initial airflow velocity, so that the disturbance effect of the airflow passing through the rear edge of the B pillar is strongest. In particular, in this embodiment, the length L2 of the separation layer 400 can be 60-90 mm.

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

Here, a typical in-vehicle wind vibration noise generated when a vehicle speed of a certain development vehicle type is 72km/h is exemplified, in which a length L1 of the flow path is set to 126.9mm, a length L2 of the partition layer is set to 91mm, distances C between the bottommost point of the partition layer 400 and the bottom wall of the flow path 300 are both set to 1.5mm, lengths D1 of the air inlet 310 and the air outlet 320 are set to 8mm, and a width D2 is set to 4 mm.

Fig. 6 is a diagram of simulation results of flow field velocity of the flow channel provided in this embodiment, and fig. 7 is a diagram of fluctuation of pressure of the airflow at the airflow outlet provided in this embodiment, and with reference to fig. 6 and 7, the inlet flow velocity of the airflow is 20m/s, and the outlet flow velocity is 64.3m/s, that is, the flow velocity at the airflow outlet 320 is amplified by more than 3 times relative to the flow velocity at the airflow inlet 310 by the turbulent flow enhancing effect of the flow channel 300. Meanwhile, periodic turbulence pressure disturbance is generated at the airflow outlet 320, so that an airflow shedding vortex structure of the B-pillar decorative plate 100 consuming directional and fixed energy is achieved, and the aim of weakening wind vibration noise in the automobile is fulfilled.

In order to more intuitively show the noise reduction effect of the flow channel 300 in this embodiment, a measurement point is further arranged at the position of the passenger at the rear row of the automobile to compare the noise at the measurement point in the prior art with the noise at the measurement point after the flow channel 300 is added, fig. 8 is a noise comparison graph at the measurement point before and after optimization, the horizontal axis is frequency, and the vertical axis is sound pressure level, which represents the magnitude of the noise in the automobile, as can be seen from fig. 8, after the technical scheme of this embodiment is adopted, the attenuation effect of the 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 extra income on door panel beating 120 and cuts off water droplet, water smoke and dust on the glass surface in order to lift the car window glass, also plays pleasing to the eye effect simultaneously, and the structure of cutting 200 is cut to the extra income of car ingenious, the flexibility of the automobile of this application embodiment, through set up runner 300 in its inside, utilizes the influence of air current to reduce the interior wind vibration noise of car, simple structure, effect are showing.

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. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides an outer water of car is cut, installs on car back door panel beating, a serial communication port, the inside that outer water was cut is equipped with the runner, the runner has airflow inlet and air outlet, airflow inlet with air outlet sets up along the length direction from preceding backward interval of car, airflow inlet sets up outer water is cut the tip that is close to the B post plaque, air outlet sets up outer water is cut the top.

2. The automobile outside water jet cutter according to claim 1, wherein a partition layer is provided in the flow passage to divide at least a part of the flow passage into an upper portion and a lower portion.

3. The automobile water jet cutter as claimed in claim 2, wherein said spacer layer is corrugated.

4. The automobile water jet cutter according to claim 2, wherein the partition layer has a length smaller than that of the flow passage, and one end of the partition layer is disposed near the air flow outlet, and the other end of the partition layer is spaced from the air flow inlet.

5. The automobile outer water jet cutter as claimed in claim 3, wherein the length of the flow channel is 100-150 mm.

6. The automobile water jet cutter according to claim 5, wherein the length of the partition layer is 60 to 90 mm.

7. The automobile outer water jet cutter according to claim 6, wherein the distance between the highest point of the partition layer and the top of the flow channel and the distance between the lowest point of the partition layer and the bottom of the flow channel are each 1 to 2 mm.

8. The automobile outer water jet cutter according to claim 6, wherein the air flow inlet and the air flow outlet are waist-shaped, and the air flow inlet and the air flow outlet have a length of 6-10mm and a width of 2-5 mm.

9. The automobile outer water jet cutter according to claim 3, wherein the partition layer is formed integrally with the flow passage.

10. An automobile comprising an automobile water jet cutter as claimed in any one of claims 1 to 9.