CN111959620A

CN111959620A - A anti side air current interference device of bionical fin structure for passenger train

Info

Publication number: CN111959620A
Application number: CN202010715507.0A
Authority: CN
Inventors: 吴晓建; 祁祺; 张鹤; 桂荣伟
Original assignee: Nanchang University
Current assignee: Nanchang University
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2020-11-20

Abstract

The utility model provides an anti side direction air current of bionical fin structure disturbs device for passenger train, through carrying out the analysis to the flow field when the passenger train is gone through the object, borrows for reference the fish swing fin and carries out the mode of self-balancing, the device that reduces side direction air current and disturb that provides. The device arranges the vision sensor in vehicle front-view mirror department, fin driving motor and imitative fish fin are arranged to the rear of a vehicle, the vision sensor detects passenger train environmental information, and with data transmission to ECU, judge whether will be close to the object and go and make the decision whether to rotate fin driving motor, at last with data transmission to imitative fish fin driving motor on, control it and carry out corresponding action, in order to change the passenger train in the air flow field when following is close to the object and goes, reduce the side direction air current and disturb, the side direction power that the side direction air current effect produced when reducing the process object. Meanwhile, for a passenger car running in a normal straight line, the expansion angle of the fin plate of the bionic fin structure device is controlled, so that the air resistance coefficient can be effectively reduced, and the fuel economy of the passenger car is improved.

Description

A anti side air current interference device of bionical fin structure for passenger train

Technical Field

The invention relates to the technical field of automobile safety and energy conservation, in particular to a bionic fin structure side airflow interference resisting device for a passenger car.

Background

While the transportation service of the highway passenger car in China greatly facilitates the transportation and the travel, the safety, the stability and the fuel economy of the passenger car in the running process are more and more emphasized. However, the working conditions are complex in the driving process, safety problems frequently occur, and factors causing safety accidents in passenger car transportation are also endless, wherein the pneumatic characteristics of the passenger car may generate strong side force interference on the passenger car, and the driving stability and safety of the passenger car are seriously affected. Specifically, the influence mainly comes from transient change of airflow around the passenger car body, when a flow field around the passenger car body changes suddenly, the passenger car body is influenced by suddenly changed aerodynamic force, and a wide and long lateral area of the passenger car brings great hidden danger to roll stability and yaw stability under the action of the lateral aerodynamic force, so that the danger of sideslip or rollover of the passenger car is easily induced. Due to the fact that the speed of the vehicle is continuously improved, and the traffic road conditions are complex, when the passenger car meets/overtakes/runs (especially vehicles with wide and long lateral areas of the vehicle body) or passes through objects (such as sound insulation boards close to expressways, tunnel side walls, large advertising boards and the like), the similar violent airflow changes can be generated, and the problems of vehicle running and traffic safety are easily brought. In summary, such safety accidents are closely related to the aerodynamic stability of the passenger car, and how to reasonably improve the lateral airflow resistance and the stability of the passenger car becomes more important.

Disclosure of Invention

The invention provides a bionic fin structure lateral airflow interference resisting device for a passenger car, which comprises a vision sensor, a fish fin simulating plate, a fin driving end and an ECU (electronic control unit); the vision sensor is arranged at a rearview mirror of the passenger car; the two fish-like fin plates are respectively arranged on two sides of the tail of the passenger car in a state; the ECU is arranged in the vehicle body and is electrically connected with the vision sensor; the fin drive end includes running gear, fixed axle, drive gear and motor output shaft, and the driving motor in the passenger train passes through the fin drive end transmission, can drive the imitative fish fin and rotate.

Preferably, the fish-like fin plate is rotatably connected to the tail of the passenger car; the fish-imitating fin plate is connected with a first shaft hole and a first plane at the tail part of the passenger car through a first shaft and a second plane, the first shaft is inserted into the first shaft hole, and the second plane is attached to the first plane, so that the stability of the installation of the fish-imitating fin plate is realized.

Preferably, a fixed shaft is arranged in the middle of a shaft surface of the fish fin simulating plate connected with the passenger car, a rotating gear is fixedly connected to the upper end of the fixed shaft through a first spline, a motor output shaft is arranged in the middle of the shaft surface of the tail of the passenger car connected with the fish fin simulating plate, a transmission gear is fixedly connected to the upper end of the motor output shaft through a third spline, and the transmission gear is meshed with the transmission gear.

Preferably, a round limiting block is arranged in the middle of the output shaft of the motor, and the transmission gear is limited on the output shaft of the motor through the limiting block; the lower extreme of motor output shaft is provided with the second spline, and the second spline is connected with the driving motor's in the passenger train output to through the second spline conduction turning force.

Preferably, when the passenger car runs by passing through an object, the pressure of the passenger car close to the object side is small due to the air flow interference between the passenger car and the object, after the judgment of the vision sensor and the ECU, the driving motor outputs torque to the motor output shaft, the transmission gear is transmitted to the transmission gear to enable the fish fin simulating plate to rotate, so that the passenger car is far away from the object side and enters the tail low-pressure area, the lateral force generated by the air flow interference is offset, the running stability of the car is improved, and the purpose of safe running is achieved.

Preferably, when the passenger car runs by passing through an object, the fish-imitating fin close to the object side is closed, and the fish-imitating fin far away from the object side is opened by a certain angle theta.

Preferably, in order to adapt to different driving conditions, the vision sensor, the fish-imitating fin and the fin driving end are symmetrically arranged.

Preferably, when the passenger train normally traveles, when the passenger train does not pass through the object promptly, the imitative fish fin board of passenger train afterbody both sides opens certain angle theta, compares with the passenger train that does not install the device, can realize lower air resistance, improves the fuel economy nature of passenger train.

Compared with the prior art, the invention has the beneficial effects that:

when the passenger car runs close to an object, the fish-imitating fin plate close to the object side is closed, the fish-imitating fin plate far away from the object side is opened to a preset angle, so that the lateral force borne by the passenger car is reduced, and the running stability of the passenger car is improved.

When the passenger car runs under other working conditions, namely the passenger car does not pass through a lateral object, the fish fin plates on the two sides of the passenger car are unfolded at a certain angle at the same time, so that the air resistance of the passenger car is reduced, and the fuel economy of the passenger car is improved.

Drawings

FIG. 1 is a schematic view of a bionic fin structure side airflow interference resisting device for a passenger car according to the invention;

FIG. 2 is the side-stream airflow disruption prevention apparatus actuator of FIG. 1;

FIG. 3 is a fin of the fish-like device of FIG. 1;

FIG. 4 is the side-stream interference rejection unit body of FIG. 1;

FIG. 5 is a drive shaft of the anti-side airflow disruption device of FIG. 1;

FIG. 6 is a view of the motor output shaft of the anti-side airflow interference device shown in FIG. 1;

FIG. 7 is a pressure profile for a passenger vehicle not equipped (right)/equipped with an anti-side airflow disruption device (left);

FIG. 8 is a graph showing the relationship between the opening angle of the fin and the lateral force;

FIG. 9 illustrates the side-stream interference rejection unit operating mode 1;

FIG. 10 illustrates side-stream interference rejection apparatus mode 2;

FIG. 11 is a speed profile of a passenger vehicle equipped with no (right)/with an anti-side airflow disruption device (left);

FIG. 12 illustrates side-stream interference rejection apparatus mode 3;

FIG. 13 is a top view showing the simulated fish fin mounting angle θ.

In the figure: 1. a vision sensor; 2. imitating a fish fin plate; 3. a fin drive end; 4. a rotating gear; 5. a fixed shaft; 6. a transmission gear; 7. an output shaft of the motor; 1a, a first shaft hole; 1b, a first plane; 2a, a first shaft; 2b, a second plane; 2c, a first groove surface; 2d, a first bottom surface; 2e, a first threaded hole; 2f, a third plane; 5a, a first spline; 5b, a first axial surface; 5c, a second threaded hole; 5e, a fourth plane; 5f, a second bottom surface; 7a, a second spline; 7b, a limiting block; 7c, a third spline.

Detailed Description

The present invention will be further described with reference to the following specific examples.

The following describes an embodiment of the present invention with reference to the drawings.

A bionic fin structure side airflow interference resisting device for a passenger car comprises a vision sensor 1, a fish fin simulating plate 2, a fin driving end 3, a rotating gear 4, a fixing shaft 5, a transmission gear 6, a motor output shaft 7 and an ECU (electronic control unit) located inside a car body, wherein the vision sensor 1 and the fish fin simulating plate 2 are shown in the figure 1 and the figure 2.

To this an anti side direction air current interference device of bionical fin structure for passenger train, when the passenger train side was close to the object and is gone, through vision sensor 1 transmission signal to ECU, and then drive fin driving motor 3 to loop through motor output shaft 7, drive gear 6, rotating gear 4, fixed axle 5, imitative fish fin 2, control imitative fish fin 2 and rotate, reduce the side direction power that produces when the passenger train side is close to the object, improve vehicle operating stability.

For the side airflow interference resisting device of the bionic fin structure for the passenger car, as shown in fig. 3-5, the bionic fin plate 2 is attached to the car body through the first shaft 2a, the first shaft hole 1a, the second plane 2b and the first plane 1b to realize positioning so as to meet the rotation requirement of the bionic fin plate 2. The fixing shaft 5 is attached to the first shaft surface 5b and the first groove surface 2c, the third plane 2f and the second bottom surface 5f, and in addition, bolts are penetrated through the second threaded holes 5c and the first threaded holes 2e, so that the rigid connection between the vehicle body and the fish-like fin 2 is realized. The rotating gear 4 is connected with the fixed shaft 5 through a first spline 5a, and the lower end face of the rotating gear 4 is attached to a fourth plane 5e to achieve positioning. The rotating gear 4 is connected with the fixed shaft 5 and then assembled on the fish-like fin plate 2, and the lower end face of the rotating gear 4 is attached to the first bottom face 2 d. The rotation gear 4 is engaged with the transmission gear 6. The transmission gear 6 is connected with the motor output shaft 7 through a third spline 7c, and the lower end face of the transmission gear 6 is attached to the limiting block 7b to achieve positioning. The motor output shaft 7 is driven by the drive motor through the second spline 7 a.

For the bionic fin structure side airflow interference resisting device for the passenger car, the vision sensor 1 is arranged at a rearview mirror of the passenger car; the fish-like fin plate 2 is arranged at the tail of the vehicle, and the fin plate driving motor is arranged at the tail of the vehicle and is rigidly connected with the vehicle body.

To this a bionic fin structure anti side air current interference device for passenger train, ECU mainly receives the data that come from vision sensor 1, and then comes to judge whether be close to the object at passenger train driving in-process.

To the side airflow interference resisting device of the bionic fin structure for the passenger car, the ECU mainly controls the driving motor to work, the driving motor outputs torque to enable the motor output shaft 7 to rotate, and the transmission mechanism enables the bionic fin plate 2 to rotate.

To this a bionic fin structure anti side air current interference device for passenger train, in order to adapt to different driving conditions, adopt symmetrical arrangement to vision sensor 1, imitative fin 2, fin drive end 3.

For the bionic fin structure anti-side airflow interference device for the passenger car, when the bionic fin plate 2 is closed, namely the opening angle (see figure 13) is 0 degree, if the passenger car runs close to the wall, low pressure can be generated on the wall close side, and under the action of pressure difference, the passenger car can generate a side force (called as side aerodynamic force) close to the wall. With reference to fig. 7, after the fish fin 2 is deployed at a certain angle (the opening angle of the left and right fins is determined as required), the fish fin will generate high pressure on the wall-close side, so as to form a lateral force (called as fin lateral force) away from the wall surface, and the fin lateral force will be opposite to the lateral aerodynamic force, so as to reduce the influence of the lateral force caused by the wall-close.

For the bionic fin structure side airflow interference resisting device for the passenger car, fig. 7 is a comparison of a pressure cloud chart of the left side bionic fin plate 2 which is closed when the left side runs against a wall and is not provided with the device, wherein the cloud chart is relative to the atmospheric pressure, and the darker the color is, the smaller the pressure is.

For the bionic fin structure lateral airflow interference resisting device for the passenger car, the magnitude of resultant force is related to the opening angle of the bionic fin structure, and the bionic fin structure is opened by a proper angle theta in combination with a graph 8, so that the optimal lateral airflow interference control effect can be realized, and the resultant force of the lateral force is minimum.

The bionic fin structure side airflow interference resisting device for the passenger car has the following specific working modes;

(1) the vision sensor 1 installed in the rearview mirror of the automobile can monitor the surrounding environment in real time, when the vision detection of the left rearview mirror finds that the left rearview mirror is close to an object, the data is transmitted to the ECU, the left side is judged to run close to the wall, the fin driving motor 3 on the left side starts to work, the torque is output from the motor output shaft 7, the opening angle of the fish fin 2 on the left side is 0, the fin on the right side is kept at the theta degree, and the lateral aerodynamic force of the fish fin is generated to reduce the lateral aerodynamic force generated when the left side is close to the object. The pattern is shown in fig. 9.

(2) Install in the vision sensor 1 of car rearview mirror and can carry out real-time supervision to surrounding environment, when the vision sensor in the right side car rearview mirror detects the discovery and is close to the object, with this data transmission to ECU, judge that the right side leans on the wall to go, and make right side fin driving motor 3 begin to work, make the imitative fish fin 2 in right side open angle be 0 from motor output shaft 7 output torque, and make the left side fin keep theta degree, generate fin board lateral force and reduce the lateral aerodynamic force that the right side produced when being close to the object. The pattern is shown in fig. 10.

(3) Install vision sensor 1 in the car rearview mirror and can carry out real-time supervision to surrounding environment, when visual detection in the car rearview mirror can not detect the object, with this data transmission to ECU, judge for normally not leaning on the wall to travel, make fin driving motor 3 maintain and open moment of torsion theta, promptly, make the imitative fin of both sides open the form (as shown in fig. 11), prevent that the fin opens the size that has reduced the wake vortex simultaneously, can effectively reduce the air resistance coefficient, improve fuel economy. The pattern is shown in fig. 12.

For the bionic fin structure lateral airflow interference resisting device for the passenger car, fig. 11 is a speed cloud chart comparing that the left and right side bionic fin plates 2 are opened simultaneously when the passenger car normally runs and the device is not installed, wherein the cloud chart is the speed, and the deeper the color is, the smaller the speed is.

For the bionic fish fin structure side airflow interference resisting device for the passenger car, the left side is close to an object, the left fish fin 2 is closed, vortex can be generated inside the fin to reduce the airflow speed inside the fin by combining with a graph 11, and according to a Bernoulli equation and a graph 7, the pressure on the left side of the fin is higher than that on the right side of the fin, so that a side force of the fish fin to the right is generated.

Claims

1. The utility model provides an anti side air current interference device of bionical fin structure for passenger train which characterized in that: the fish-imitating fin comprises a visual sensor (1), a fish-imitating fin (2), a fin driving end (3) and an ECU (electronic control unit);

the vision sensor (1) is arranged at a passenger car rearview mirror;

the two fish-like fin plates (2) are respectively arranged on two sides of the tail of the passenger car in a state;

the ECU is arranged in the vehicle body and is electrically connected with the vision sensor (1);

fin drive end (3) include rotating gear (4), fixed axle (5), drive gear (6) and motor output shaft (7), and driving motor in the passenger train passes through fin drive end (3) transmission, can drive imitative fish fin (2) and rotate.

2. The bionic fin structure anti-side airflow interference device for the passenger car according to claim 1, characterized in that:

the fish-like fin plate (2) is rotatably connected to the tail of the passenger car;

the fish-imitating fin plate (2) is connected with a first shaft hole (1a) and a first plane (1b) at the tail of the passenger car through a first shaft (2a) and a second plane (2b), the first shaft (2a) is inserted into the first shaft hole (1a), and the second plane (2b) is attached to the first plane (1b), so that the stability of the installation of the fish-imitating fin plate (2) is realized.

3. The bionic fin structure anti-side airflow interference device for the passenger car according to claim 1, characterized in that:

a fixed shaft (5) is arranged in the middle of the shaft surface of the fish fin simulating plate (2) connected with the passenger car, and the upper end of the fixed shaft (5) is fixedly connected with a rotating gear (4) through a first spline (5 a);

a motor output shaft (7) is arranged in the middle of a shaft surface connected with the fish fin simulating plate (2) at the tail of the passenger car, and the upper end of the motor output shaft (7) is fixedly connected with a transmission gear (6) through a third spline (7 c);

the transmission gear (6) is meshed with the transmission gear (4) in the opposite direction.

4. The bionic fin structure anti-side airflow interference device for the passenger car according to claim 3, wherein:

a round limiting block (7b) is arranged in the middle of the motor output shaft (7), and the transmission gear (6) is limited on the motor output shaft (7) through the limiting block (7 b);

the lower end of the motor output shaft (7) is provided with a second spline (7a), and the second spline (7a) is connected with the output end of a driving motor in the passenger car and transmits rotating force through the second spline (7 a).

5. The bionic fin structure anti-side airflow interference device for the passenger car according to claim 1, characterized in that:

when the passenger car runs by passing through an object, the passenger car is small in pressure close to the object side due to air flow interference between the passenger car and the object, after the passenger car is judged by the vision sensor (1) and the ECU, the driving motor outputs torque to the motor output shaft (7), the driving gear (4) is transmitted through the transmission gear (6) to enable the fish fin simulating plate (2) to rotate, the passenger car is far away from the object side and enters a car tail low-pressure area, therefore, the lateral force generated by the air flow interference is offset, the running stability of the car is improved, and the purpose of safe running is achieved.

6. The bionic fin structure anti-side airflow interference device for the passenger car according to claim 1, characterized in that:

when the passenger car runs by passing through an object, the fish-imitating fin plates (2) close to the object side are closed, and the fish-imitating fin plates (2) far away from the object side are opened by a certain angle theta.

7. The bionic fin structure anti-side airflow interference device for the passenger car according to claim 1, characterized in that:

in order to adapt to different driving conditions, the vision sensor (1), the fish-imitating fin plate (2) and the fin plate driving end (3) are symmetrically arranged.

8. The bionic fin structure anti-side airflow interference device for the passenger car according to claim 1, characterized in that:

when the passenger train normally traveles, when the passenger train does not pass through the object promptly, imitative fish fin board (2) of passenger train afterbody both sides open certain angle theta, compare with the passenger train of not installing the device, can realize lower air resistance, improve the fuel economy nature of passenger train.