CN204323343U - A kind of device utilizing air foam to reduce Aerodynamic Drag of High Speed Train - Google Patents

Abstract

The utility model discloses a device for reducing the air resistance of a high-speed train by using air foam, which comprises a water storage tank arranged on the train, a water pump connected to the water storage tank, a foam generator connected to the output port of the water pump, and a foam generator The output port of the air foam injection pipeline is connected with the air foam injection pipeline, and the air foam injection pipeline is laid on the surface of the train, and several injection holes are arranged on the air foam injection pipeline. The water pump will pump the foam liquid from the reservoir into the foam generator. The foam liquid will become foam after being processed by the foam generator, and will be sprayed on the surface of the train by the air foam injection pipe to become air foam, so that the air foam layer will The contact between the air and the train is weakened, thereby achieving the purpose of reducing the air resistance of the train. The scheme described in the utility model has the advantages of simple structure, easy practical application, convenient operation, reliable operation and reasonable cost. By effectively reducing the air resistance in high-speed train running, the train running speed is improved and energy consumption is reduced.

Description

A device for reducing air resistance of high-speed trains by using air foam

technical field

The utility model belongs to a device for reducing air resistance of a high-speed train, in particular to a device for reducing the air resistance of a high-speed train by using air foam.

Background technique

In recent years, our country is starting to study and establish high-speed train operation system. Because the air resistance suffered by the train is proportional to the square of the speed, and the power dissipated by the air resistance is proportional to the cube of the speed, so the air resistance and its dissipated power increase sharply with the increase of the speed of the train. The research results show that when a high-speed train runs at a speed of 300km/h, its air resistance accounts for 80% of the total resistance, so reducing air resistance is closely related to increasing train speed and reducing energy consumption. The key issue of speed. The traditional ways to reduce air resistance include: reducing the cross-sectional area of the train or reducing the air resistance coefficient. According to the research, the calculation formula of the air resistance of the high-speed train is It can be seen from the formula that the air resistance of the high-speed train is related to ρ, V, S, and C _x , where the air density ρ is usually a constant, and the train speed V is the quantity that people hope to increase continuously. Therefore, to reduce the air resistance , the traditional method is to reduce the train cross-sectional area S and air resistance coefficient C _x . However, the reduction of the cross-sectional area of the train is limited, and the reduction of the air resistance coefficient has not achieved the optimal ideal effect.

However, the reduction of the cross-sectional area of the train is limited, and the reduction of the air resistance coefficient has not achieved the optimal ideal effect. In order to further increase the speed of the train, it is necessary to find a new way to reduce air resistance.

Invention content:

The purpose of this utility model is to provide a device with simple principle, convenient operation, reliable operation, which can effectively reduce the air resistance of trains running by using air foam to reduce the air resistance of high-speed trains, so as to overcome the deficiencies of the prior art.

To achieve the above object, the technical solution of the utility model is:

A device for reducing the air resistance of a high-speed train by using air foam, comprising a water reservoir arranged on the train, a water pump connected to the water reservoir, and a foam generator connected to the output port of the water pump. The output port of the foam generator is connected with The air foam injection pipeline is laid on the surface of the train, and the air foam injection pipeline is provided with several injection holes; the train is also provided with a microcomputer and a train speed sensor connected to the first input port of the microcomputer; The first output port is connected to the water pump.

Preferably, the train speed sensor is a piezoelectric train speed sensor.

Preferably, a flow sensor is provided at the output end of the foam generator, and the flow sensor is connected to the second input port of the microcomputer.

Preferably, the flow sensor is a pipeline type vortex flow sensor.

Preferably, the microcomputer also includes a second output port, and the second output port is connected to an audible and visual alarm.

Preferably, the air foam injection pipes are evenly laid on the surface of the train.

Preferably, the train surface is also provided with a thin film, and the air foam injection pipe is arranged between the thin film and the train surface, and the thin film and the train surface are connected by a film-fixed line, and the film-fixed line and the injection holes are arranged in a misaligned manner.

Preferably, the solid-film wire is a metal wire, the solid-film wire is embedded in the inner surface of the film close to the train, and the solid-film wire is fixedly connected to the train surface.

Preferably, the microcomputer is a 51 series single-chip microcomputer or an ARM processor or a PLC controller or an industrial computer.

The beneficial effect of the utility model is that: the water pump will pump the foam liquid from the reservoir and inject it into the foam generator. Foam, so that the air foam layer weakens the contact between the air and the train, thereby achieving the purpose of reducing the air resistance of the train. Through the speed sensor and flow sensor connected with the microcomputer, the real-time detection of the train speed is achieved, and the speed of the water pump is controlled according to the real-time speed of the train, so as to control the final foam injection volume and flow rate. The flow sensor arranged at the output port of the foam generator monitors the actual output foam flow and returns the data to the microcomputer, which can realize further and more accurate control of the water pump. The film on the outermost layer is fixed on the surface of the train through the solid film line, and is arranged in a misaligned position with the injection holes on the air foam injection pipe, so that a more stable air foam layer can be formed on the surface of the train to reduce the air resistance of the train more effectively the goal of. The scheme described in the utility model has the advantages of simple structure, easy practical application, convenient operation, reliable operation and reasonable cost. By effectively reducing the air resistance of high-speed trains, the speed of trains can be improved and energy consumption can be reduced.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment,

Fig. 2 is the structural representation of the air foam injection pipeline laying on the train surface of the practical information embodiment;

FIG. 3 is a schematic diagram of an embodiment of the practical information.

In the figure: 1-reservoir, 2-water pump, 3-foam generator, 4-microcomputer, 5-air foam injection pipe, 6-injection hole, 7-train speed sensor, 8-film, 9-flow sensor , 10-train.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

A kind of device (Fig. 1) that utilizes air foam to reduce the air resistance of a high-speed train, comprising a water reservoir 1, a water pump 2, a foam generator 3, a microcomputer 4 and an air foam injection pipeline 5 arranged on the train 10, through respective Corresponding support members are mounted inside or on the train 10 .

The reservoir 1, the water pump 2 and the foam generator 3 are connected in sequence through pipelines, and the output port of the foam generator 3 is connected with an air foam injection pipeline 5, and the air foam injection pipeline 5 is arranged on the surface of the train 10. In this embodiment, the air foam injection pipeline 5 is evenly laid on the surface of the train 10, and is provided with several injection holes 6 (FIG. 2).

The first input port of the microcomputer 4 is connected to the train speed sensor 7 , and the first output port is connected to the water pump 2 . A flow sensor 9 is also provided at the output end of the foam generator 3 , and the flow sensor 9 is connected to the second input port of the microcomputer 4 . The microcomputer 4 also includes a second output port, and the second output port is connected with an audible and visual alarm.

In this embodiment, the train speed sensor 7 is a piezoelectric train speed sensor 7 . The flow sensor 9 is a pipeline type vortex flow sensor 9, which can be used for flow measurement of media such as liquid, steam and compressed air. The microcomputer 4 is a 51 series single-chip microcomputer or an ARM processor or a PLC controller or an industrial computer. The foam generator 3 is composed of a filter screen, a foam nozzle, an adapter cover, a switching head and the like; the sound and light alarm includes an LED light and a buzzer.

As an improvement of this embodiment, a thin film 8 is arranged on the outer layer of the air foam injection pipe 5, and the thin film 8 is connected to the surface of the train 10 through a solid film line. The solid-film wire is a metal wire, and the solid-film wire is embedded in the inner surface of the film 8 close to the train 10. The solid-film wire is fixedly connected to the surface of the train 10, and the solid-film wire and the injection hole 6 are arranged in a misplaced manner. The fixed connection of the solid-film wire with the surface of the train 10 means that the solid-film wire is longitudinally fused to the surface of the train 10 circle by circle.

Quantum size effects occur when the thickness of the thin film 8 reaches nanometer dimensions. This is because the movement of electrons is confined in the thin film 8, causing the energy band structure in the direction perpendicular to the surface to split to generate a quantum well state. Make film 8 surface have adsorptive property, when train 10 is stationary, film 8 can be adsorbed on the metal surface of train 10, and train 10 becomes a whole, only when air foam comes out from the injection hole 6 of air foam injection pipeline 5, just A slight gap is formed between the surface of the train 10 and the membrane 8 . When the train 10 starts to run, as the speed increases, the air pressure on the surface of the train 10 will drop, and the force exerted by the atmospheric pressure on the film 8 is also towards the inner side of the train 10, and the air bubbles ejected will only enter the tiny gaps in the 8 layers of the film. .

After the foam comes out from the foam generator 3, it is delivered to the air foam injection pipeline 5 distributed on the train surface, and many injection holes 6 are distributed on the pipeline, and the air foam is just ejected from these injection holes 6, and is arranged on the surface of the train. This layer of film 8 makes the air foam ejected evenly distributed on the surface of the train 10 to form a layer of air foam layer, which reduces the air density on the surface of the train 10, thereby reducing the air pressure of the train 10. resistance, increased the speed of the train by 10, and saved energy.

During the running of the high-speed train 10 , air resistance is the main component of the resistance of the high-speed train 10 , and the source of the air resistance is the viscosity of the air. If there is no viscosity, the surroundings of the train 10 flowing in the air are complete ideal fluids, and the air resistance obtained from the ideal fluid theory should be zero, but in fact the air resistance is very large. This device controls the foam generator 3 on the train A layer of air foam is produced on the surface of the 10, which reduces the friction between the train 10 and the air and reduces air resistance.

The realization method that the device described in this embodiment utilizes air foam to reduce the air resistance of the high-speed train 10 is: the water pump 2 will pump and inject the foam liquid into the foam generator 3, and the foam liquid will become foam after being processed by the foam generator 3, and will be fed by the air The foam injection pipeline 5 is sprayed on the surface of the train 10, and becomes air foam after meeting the air, so that the air foam layer has weakened the contact of the air and the train 10.

When the train 10 started running, the train speed sensor 7 detected the real-time speed, and the foam flow corresponding to each speed was stored in the microcomputer 4, and the pumping speed of the water pump 2 was controlled by the microcomputer 4 to achieve the purpose of controlling the foam flow.

At the same time, the actual flow rate of the foam at the output end of the foam generator 3 is detected by the flow sensor 9, compared with the desired flow rate of the microcomputer 4, and the signal is sent to the microcomputer 4 to start control. When the flow rate is obviously insufficient, it means that the foam liquid is insufficient. , the signal is transmitted to the microcomputer 4, and a real-time alarm is displayed on the man-machine interface.

The speed sensor detects the speed of the train 10 in real time, and each speed has a foam flow corresponding to it. By comparing with the real-time foam flow fed back, the signal is sent to the microcomputer 4. The microcomputer 4 is connected with the man-machine interface to realize mutual transmission of information; the microcomputer 4 controls the speed of the water pump 2, the faster the train 10 travels, the greater the speed of the water pump 2, the greater the flow of the foam liquid, and the foam generator 3 Turn the foam liquid into foam and spray it on the surface of the train 10, and the flow sensor 9 installed on the pipeline detects the flow of the foam in real time, and feeds back the signal of the change of the foam flow to form a closed-loop information feedback system; the microcomputer 4 and the sound and light The alarm is connected, and when the foam flow is not equal to the given flow for a long time, or when the foam liquid is insufficient, the microcomputer 4 connects the sound and light alarm to give an alarm in real time. (image 3)

The microcomputer 4 receives the input and output instructions of the man-machine interface, and the man-machine interface can receive the information transmitted by the microcomputer 4, such as displaying the speed of the train 10 and the flow of foam, and can also set parameters to stipulate the corresponding output of each speed. foam flow, and the signal is sent to the microcomputer 4 to realize the overall control of the device.

When the high-speed train 10 was running on the track, the speed sensor installed on the train 10 detected the real-time speed, and obtained the foam flow A value corresponding to the speed of the train 10, and the real-time foam flow measured by the flow sensor 9 was the B value, After comparing the values of A and B, the signal is sent to the microcomputer 4, and the microcomputer 4 processes the signal, and its output signal controls the speed of the water pump 2, injects the foam liquid in the pool into the foam generator 3, and the foam liquid passes through the foam to generate Device 3 becomes foam after processing, and sprays on the surface of train 10 by pipeline, becomes air foam after running into air, and air foam layer has just weakened the friction of air and train 10 like this.

While the foam is sprayed onto the surface of the high-speed train 10, the flow sensor 9 installed on the pipeline measures the foam flow flowing through the pipeline in real time, and provides feedback in time, and determines the increase or decrease of the foam flow by comparing the values of A and B.

If A>B, it means that the given flow corresponding to the speed of the train 10 is larger than the real-time flow, and the microcomputer 4 needs to increase the speed of the water pump 2 to increase the foam flow to correspond to the speed of the train 10. If A<B, it means that the given flow corresponding to the speed of the train 10 is smaller than the real-time flow, and the microcomputer 4 needs to reduce the speed of the water pump 2 to reduce the foam flow to correspond to the speed of the train 10. If A=B, it means that the given flow corresponding to the speed of the train 10 is equal to the real-time flow, and there is no need to adjust the speed of the water pump 2 . In this way, a closed-loop negative feedback control system is formed, which can ensure the stability of the system.

In a word, the structure of this embodiment achieves the purpose of reducing air resistance by changing the air density on the surface of the train 10. A layer of air foam is generated on the surface of the train 10, which reduces the air density on the surface of the train 10 when it is running at high speed. Thereby, the friction between the train 10 and the air is reduced, and the air resistance is reduced.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present utility model. Parts not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims (9)

1. the device utilizing air foam to reduce Aerodynamic Drag of High Speed Train, it is characterized in that: comprise the hydraulic accumulator (1) be arranged on train (10), be connected to the water pump (2) of described hydraulic accumulator (1), be connected to the foam producer (3) of described water pump (2) output port, the output port of described foam producer (3) is connected with air foam injection pipe (5), described air foam injection pipe (5) is laid on described train (10) surface, described air foam injection pipe (5) is provided with several injection hole (6), described train (10) is also provided with microcomputer (4), and being connected to the train speed sensor (7) of described microcomputer (4) first input end mouth, the first output port of described microcomputer (4) is connected to water pump (2).

2. a kind of device utilizing air foam to reduce Aerodynamic Drag of High Speed Train according to claim 1, is characterized in that: described train speed sensor (7) is piezoelectric type train speed sensor (7).

3. a kind of device utilizing air foam to reduce Aerodynamic Drag of High Speed Train according to claim 1, it is characterized in that: be provided with flow sensor (9) at the mouth of foam producer (3), described flow sensor (9) connects described microcomputer (4) second input port.

4. a kind of device utilizing air foam to reduce Aerodynamic Drag of High Speed Train according to claim 3, is characterized in that: described flow sensor (9) is duct type vortex flow sensors (9).

5. a kind of device utilizing air foam to reduce Aerodynamic Drag of High Speed Train according to claim 1, it is characterized in that: described microcomputer (4) also comprises the second output port, described second output port connects combined aural and visual alarm.

6. a kind of device utilizing air foam to reduce Aerodynamic Drag of High Speed Train according to claim 1, is characterized in that: described air foam injection pipe (5) uniform spreading is located at the surface of described train (10).

7. a kind of device utilizing air foam to reduce Aerodynamic Drag of High Speed Train according to claim 1, it is characterized in that: described train (10) surface is also provided with film (8), described air foam injection pipe (5) is arranged between described film (8) and described train (10) surface, described film (8) is connected by solid film line with described train (10) surface, and described solid film line and described injection hole (6) misplace and arrange.

8. a kind of device utilizing air foam to reduce Aerodynamic Drag of High Speed Train according to claim 7, it is characterized in that: described solid film line is metal filament, described solid film line mosaic is at the inside face of described film (8) near described train (10), and described solid film line is fixedly connected on described train (10) surface.

9. a kind of air foam that utilizes according to claim 1 reduces the device of Aerodynamic Drag of High Speed Train, it is characterized in that: described microcomputer (4) is 51 series monolithics or arm processor or PLC or industrial computer.