CN109968987B - Pantograph of high-speed train and noise reduction method thereof - Google Patents

Pantograph of high-speed train and noise reduction method thereof Download PDF

Info

Publication number
CN109968987B
CN109968987B CN201910226063.1A CN201910226063A CN109968987B CN 109968987 B CN109968987 B CN 109968987B CN 201910226063 A CN201910226063 A CN 201910226063A CN 109968987 B CN109968987 B CN 109968987B
Authority
CN
China
Prior art keywords
pantograph
speed train
electrode
noise
sliding plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910226063.1A
Other languages
Chinese (zh)
Other versions
CN109968987A (en
Inventor
景所立
牟清波
张作钦
刘茂盛
初永臣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Qingdao Sifang Co Ltd
Original Assignee
CRRC Qingdao Sifang Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CRRC Qingdao Sifang Co Ltd filed Critical CRRC Qingdao Sifang Co Ltd
Priority to CN201910226063.1A priority Critical patent/CN109968987B/en
Publication of CN109968987A publication Critical patent/CN109968987A/en
Application granted granted Critical
Publication of CN109968987B publication Critical patent/CN109968987B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
    • B60L5/20—Details of contact bow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • B60L5/18—Current collectors for power supply lines of electrically-propelled vehicles using bow-type collectors in contact with trolley wire
    • B60L5/20—Details of contact bow
    • B60L5/205—Details of contact bow with carbon contact members

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Abstract

The embodiment of the invention provides a high-speed train pantograph and a noise reduction method thereof, wherein the high-speed train pantograph comprises: a slide plate; a plasma exciter is arranged on the windward side of the sliding plate; the side face of the plasma exciter, which is in contact with the sliding plate, completely covers the windward side of the sliding plate; the upper surface of the plasma exciter is flush with the upper surface of the sliding plate or lower than the upper surface of the sliding plate; the lower surface of the plasma exciter is flush with the lower surface of the sliding plate or higher than the lower surface of the sliding plate; at least one group of electrodes are laid on the inner side and the outer side of the windward side of the plasma exciter along the spanwise direction of the sliding plate. The embodiment of the invention provides a high-speed train pantograph and a noise reduction method thereof, which are used for actively controlling an air flow boundary layer through a plasma exciter, effectively inhibiting vortex shedding, improving the pneumatic characteristic of the pantograph in the running process of a train, reducing the pneumatic noise generated by the pantograph in the running process of the high-speed train and achieving the purposes of reducing the noise and improving the comfort of passengers.

Description

Pantograph of high-speed train and noise reduction method thereof
Technical Field
The embodiment of the invention relates to the technical field of electric power train equipment, in particular to a high-speed train pantograph and a noise reduction method thereof.
Background
The dynamic environment of a common train mainly plays a role of machinery and electricity, while the dynamic environment of a high-speed train mainly plays a role of pneumatics, thereby bringing about the maximum limit of aerodynamic noise. When the train runs at a high speed, the pantograph can generate serious disturbance to the air flow, and the air flow generates complex flow separation and a series of vortex shedding and breaking, so that a strong far-field air pulsation pressure field is generated, and the air pulsation pressure field is converted into pneumatic noise.
In the prior art, there are many methods for optimizing noise reduction design of a pantograph, such as improving a pantograph structure, adhering a porous material to a pantograph member, installing a dome, and the like, so as to reduce an air resistance coefficient of a high-speed train and reduce aerodynamic noise. Although these passive methods have some effect, they have more limiting factors. Such as too much dependence on engineering experience, limited noise reduction effect and high cost.
Disclosure of Invention
It is an object of embodiments of the present invention to provide a high speed train pantograph and a method of noise reduction thereof which overcomes or at least partially solves the above mentioned problems.
In order to solve the above technical problem, in one aspect, an embodiment of the present invention provides a high-speed train pantograph, including: a slide plate;
a plasma exciter is arranged on the windward side of the sliding plate;
the side face of the plasma exciter, which is in contact with the sliding plate, completely covers the windward side of the sliding plate;
the upper surface of the plasma exciter is flush with the upper surface of the sliding plate or lower than the upper surface of the sliding plate; the lower surface of the plasma exciter is flush with the lower surface of the sliding plate or higher than the lower surface of the sliding plate;
and at least one group of electrodes are laid on the inner side and the outer side of the windward side of the plasma exciter along the spanwise direction of the sliding plate.
On the other hand, an embodiment of the present invention provides a noise reduction method for a high-speed train pantograph, including:
acquiring the volume and/or frequency of noise generated by a pantograph when a train runs;
and adjusting the excitation voltage of a plasma exciter according to the volume and/or frequency of the noise, wherein the plasma exciter is arranged on the windward side of the pantograph slide plate.
In another aspect, an embodiment of the present invention provides an electronic device, including:
the processor and the memory are communicated with each other through a bus; the memory stores program instructions executable by the processor, which when called by the processor are capable of performing the methods described above.
The embodiment of the invention provides a high-speed train pantograph and a noise reduction method thereof, which are used for actively controlling an air flow boundary layer through a plasma exciter, effectively inhibiting vortex shedding, improving the pneumatic characteristic of the pantograph in the running process of a train, reducing the pneumatic noise generated by the pantograph in the running process of the high-speed train and achieving the purposes of reducing the noise and improving the comfort of passengers.
Drawings
Fig. 1 is a schematic view of a high-speed train pantograph provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of relative positions of electrodes of a plasma exciter according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of an electrode of a plasma exciter according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a noise reduction device for a pantograph of a high-speed train according to an embodiment of the present invention;
FIG. 5 is a schematic view of an installation position of a plasma exciter and a noise monitoring device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the active control of gas flow by the plasma actuator according to the embodiment of the present invention;
fig. 7 is a schematic diagram illustrating a noise reduction method for a pantograph of a high-speed train according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic view of a high-speed train pantograph according to an embodiment of the present invention, and as shown in fig. 1, the embodiment of the present invention provides a high-speed train pantograph, which needs to be described as follows: only a schematic cross-sectional view of the pantograph slide plate portion is shown in fig. 1, the other components of the pantograph not being shown.
This pantograph includes: a slide plate;
a plasma exciter is arranged on the windward side of the sliding plate;
the side face of the plasma exciter, which is in contact with the sliding plate, completely covers the windward side of the sliding plate;
the upper surface of the plasma exciter is flush with the upper surface of the sliding plate or lower than the upper surface of the sliding plate; the lower surface of the plasma exciter is flush with the lower surface of the sliding plate or higher than the lower surface of the sliding plate;
and at least one group of electrodes are laid on the inner side and the outer side of the windward side of the plasma exciter along the spanwise direction of the sliding plate.
Specifically, the high-speed train runs at a high speed, generally at a speed of 300 km/h or more. The dynamic environment of a high-speed train is mainly pneumatically operated, and the maximum limitation caused by the pneumatic environment is pneumatic noise. When the train runs at a high speed, the pantograph can generate serious disturbance to the air flow, and the air flow generates complex flow separation and a series of vortex shedding and breaking, so that a strong far-field air pulsation pressure field is generated, and the air pulsation pressure field is converted into pneumatic noise.
According to the high-speed train pantograph provided by the embodiment of the invention, the plasma exciter is arranged on the windward side 301 of the pantograph slide plate 101. The slide 101 is mounted on a bracket 401. The side of the plasma exciter in contact with the sled completely covers the windward side 301 of the sled.
The upper surface of the plasma exciter is flush with the upper surface of the sliding plate or lower than the upper surface of the sliding plate, so that the contact between the sliding plate and the contact line can be ensured, and the abrasion of the plasma exciter can be prevented. The lower surface of the plasma exciter is flush with or higher than the lower surface of the sliding plate, so that the wind resistance can be reduced to the maximum extent.
At least one group of electrodes are laid on the inner side and the outer side of the windward side of the plasma exciter along the spanwise direction of the sliding plate. Two sets of electrodes (one set of electrodes comprises a bare electrode 201 and an encapsulated electrode 202) are schematically shown in fig. 1, and the number of sets of electrodes in practical application can be determined according to practical situations.
In practical application, the train may run in the forward direction or in the reverse direction, and the windward side running in the forward direction becomes the leeward side when running in the reverse direction. Therefore, in order to ensure that the noise can be reduced when the train runs in the forward direction and the reverse direction, a plasma exciter can be arranged on each side surface of the sliding plate.
When the train runs at a high speed and generates high noise, the plasma exciter is started to form plasma on the surface of the sliding plate, so that the direction of the air flow is guided to change, the active control on the air flow is realized, the boundary layer separation and the falling of air flow vortex can be effectively inhibited, and the noise of the high-speed railway pantograph is greatly reduced.
The embodiment of the invention provides a high-speed train pantograph, which is characterized in that an air flow boundary layer is actively controlled through a plasma exciter, vortex shedding is effectively inhibited, the pneumatic characteristic of the pantograph in the running process of a train is improved, the pneumatic noise generated by the pantograph in the running process of the high-speed train can be reduced, and the purposes of reducing noise and improving the comfort of passengers are achieved.
On the basis of the above embodiment, further, the plasma exciter is glued on the windward side of the skateboard.
Specifically, the high-speed train runs at a high speed, generally at a speed of 300 km/h or more. The high-speed train has high requirements on the pantograph slide plate, namely light weight, high strength and good wear resistance. Pantograph slides are usually made of carbon material.
In the embodiment of the invention, the plasma exciter is glued on the windward side of the sliding plate by adopting a gluing process. The gluing process does not increase extra weight, has better connection reliability and can meet the requirement of a high-speed train on the pantograph slide plate.
The embodiment of the invention provides a high-speed train pantograph, which is characterized in that an air flow boundary layer is actively controlled through a plasma exciter, vortex shedding is effectively inhibited, the pneumatic characteristic of the pantograph in the running process of a train is improved, the pneumatic noise generated by the pantograph in the running process of the high-speed train can be reduced, and the purposes of reducing noise and improving the comfort of passengers are achieved.
On the basis of the above embodiment, further, the plasma exciter includes a bare electrode, a packaged electrode, an insulating medium, and an excitation power supply, and a group of electrodes of the plasma exciter includes a bare electrode and a packaged electrode.
Specifically, as shown in fig. 1, in the embodiment of the present invention, the plasma exciter includes a bare electrode 201, a packaged electrode 202, an insulating medium 203, and an exciting power supply. In fig. 1, an excitation power supply is not shown, and in fig. 1, two pairs (groups) of electrodes, that is, two exposed electrodes 201 and two encapsulated electrodes 202 are shown, and in practical application, at least one exposed electrode 201 and one encapsulated electrode 202 may be selectively arranged according to specific situations.
The bare electrode 201 is disposed on the outer surface of the insulating dielectric 203, and the encapsulated electrode 202 is buried inside the insulating dielectric 203.
The material of the electrode is selected from copper foil, silver foil and the like. The material of the rim medium 203 can be selected from ceramic, glass, rubber, etc.
The discharge loop of the excitation power supply can generate output voltage with the amplitude of 1kV to 100kV and the frequency width of 1kHz to 100 kHz.
The embodiment of the invention provides a high-speed train pantograph, which is characterized in that an air flow boundary layer is actively controlled through a plasma exciter, vortex shedding is effectively inhibited, the pneumatic characteristic of the pantograph in the running process of a train is improved, the pneumatic noise generated by the pantograph in the running process of the high-speed train can be reduced, and the purposes of reducing noise and improving the comfort of passengers are achieved.
On the basis of the above embodiments, further, the plane where the exposed electrode is located and the plane where the encapsulated electrode is located are parallel to each other, or form an intersection angle of a preset degree with each other.
Specifically, fig. 2 is a schematic diagram of relative positions of electrodes of a plasma exciter according to an embodiment of the present invention, and as shown in fig. 2, the plasma exciter includes a bare electrode 201, a packaged electrode 202, and an insulating medium 203.
The bare electrode 201 is disposed on the outer surface of the insulating dielectric 203, and the encapsulated electrode 202 is buried inside the insulating dielectric 203.
Fig. 2 (a) shows that the plane of the bare electrode 201 and the plane of the encapsulated electrode 202 form an intersection angle of a predetermined number of degrees, and the predetermined number of degrees may be set according to the requirement of practical application.
Fig. 2 (b) shows that the plane of the bare electrode 201 and the plane of the encapsulated electrode 202 are parallel to each other.
Different noise reduction effects can be produced by different relative positions of the electrodes. In practical application, the relative position of the electrode is selected, a test is required according to practical conditions, then the noise reduction effect under the condition of different relative positions of the electrode is analyzed, and the optimal relative position of the electrode is selected.
The embodiment of the invention provides a high-speed train pantograph, which is characterized in that an air flow boundary layer is actively controlled through a plasma exciter, vortex shedding is effectively inhibited, the pneumatic characteristic of the pantograph in the running process of a train is improved, the pneumatic noise generated by the pantograph in the running process of the high-speed train can be reduced, and the purposes of reducing noise and improving the comfort of passengers are achieved.
On the basis of the above embodiments, further, the exposed electrode is a strip electrode, the surface of the exposed electrode is a plane or a curved surface, and the surface of the exposed electrode is smooth or has a sawtooth-shaped groove or a rectangular groove;
the packaging electrode is a strip electrode, the surface of the packaging electrode is a plane or a curved surface, and the surface of the packaging electrode is smooth or is provided with a sawtooth-shaped groove or a rectangular groove.
Specifically, fig. 3 is a schematic cross-sectional view of an electrode of a plasma exciter according to an embodiment of the present invention, as shown in fig. 3, in the embodiment of the present invention, the exposed electrode is a strip-shaped (or plate-shaped) electrode, the surface of the exposed electrode is a flat surface or a curved surface, and the surface of the exposed electrode is smooth or has a sawtooth-shaped groove or a rectangular groove. Wherein (a) in fig. 3 indicates that the cross section of the exposed electrode is linear, i.e., both surfaces of the exposed electrode are flat and both surfaces of the exposed electrode are smooth. Fig. 3 (b) shows that the exposed electrode has a zigzag cross section, i.e., both surfaces of the exposed electrode are flat, and one of the surfaces of the exposed electrode is smooth and the other surface has zigzag grooves. Fig. 3 (c) shows that the exposed electrode has a rectangular cross section, i.e., both surfaces of the exposed electrode are flat, and one of the surfaces of the exposed electrode is smooth and the other surface has a rectangular groove. Fig. 3 (d) shows that the cross section of the exposed electrode is curved, that is, both surfaces of the exposed electrode are curved and both surfaces of the exposed electrode are smooth.
In the embodiment of the invention, the packaging electrode is a strip electrode, the surface of the packaging electrode is a plane or a curved surface, and the surface of the packaging electrode is smooth or is provided with a sawtooth-shaped groove or a rectangular groove.
The shape of the encapsulated electrode may be the same as the shape of the exposed electrode.
Different shapes of the electrodes have different noise reduction effects in practical application. In practical application, the shape of the electrode is selected, a test is required according to actual conditions, then, the noise reduction effect under the condition of different shapes of the electrode is analyzed, and the optimal electrode shape is selected.
The embodiment of the invention provides a high-speed train pantograph, which is characterized in that an air flow boundary layer is actively controlled through a plasma exciter, vortex shedding is effectively inhibited, the pneumatic characteristic of the pantograph in the running process of a train is improved, the pneumatic noise generated by the pantograph in the running process of the high-speed train can be reduced, and the purposes of reducing noise and improving the comfort of passengers are achieved.
On the basis of the above embodiments, further, the excitation power supply includes a signal generator, a power amplifier, and a step-up transformer;
the signal generator is connected with the power amplifier;
the power amplifier is connected with the boosting transformer;
the first output end of the step-up transformer is connected with the exposed electrode, and the second output end of the step-up transformer is connected with the encapsulated electrode.
Specifically, fig. 4 is a schematic structural diagram of a noise reduction device for a high-speed train pantograph according to an embodiment of the present invention, and as shown in fig. 4, the high-speed train pantograph is provided with the noise reduction device, and the noise reduction device for the high-speed train pantograph includes a plasma exciter, where the plasma exciter includes a bare electrode, a packaged electrode, an insulating medium, and an excitation power supply.
The exciting power supply consists of a signal generator, a power amplifier and a booster transformer, and the discharge loop can generate output voltage with amplitude of 1 kV-100 kV and bandwidth of 1 kHz-100 kHz.
The signal generator in the excitation power supply is connected with the power amplifier; the power amplifier is connected with the booster transformer; two ends of the step-up transformer are connected with the plasma exciter, namely, the first output end of the step-up transformer is connected with the exposed electrode, and the second output end of the step-up transformer is connected with the encapsulated electrode.
The exciting power switch thyristor is triggered by the digital delay generator; in addition, the digital delay generator outputs a signal to the PC terminal as a time reference signal for triggering the action. The digital delay generator is used for synchronously triggering and activating the power switch.
The embodiment of the invention provides a high-speed train pantograph, which is characterized in that an air flow boundary layer is actively controlled through a plasma exciter, vortex shedding is effectively inhibited, the pneumatic characteristic of the pantograph in the running process of a train is improved, the pneumatic noise generated by the pantograph in the running process of the high-speed train can be reduced, and the purposes of reducing noise and improving the comfort of passengers are achieved.
On the basis of the above embodiments, further, the train protection device further includes a noise monitoring device, and the noise monitoring device is used for acquiring the volume and/or frequency of noise generated by the pantograph when the train runs.
Specifically, as shown in fig. 4, the pantograph of the high-speed train further includes a noise monitoring device for acquiring the volume and/or frequency of noise generated by the pantograph when the train is running. The noise monitoring device is connected with the PC terminal.
Fig. 5 is a schematic view of the installation position of the plasma exciter and the noise monitoring device according to the embodiment of the present invention, and as shown in fig. 5, the noise monitoring device is installed at the top end of the train, close to the pantograph, so as to facilitate noise detection. The PC end is arranged inside the train, so that the operation of workers is facilitated.
In the actual operation working condition of the high-speed train, the noise generated by the pantograph of the high-speed train is monitored and fed back in real time through the noise monitoring device and is compared with a PC (personal computer) end database, and the separation condition of the air boundary layer of the pantograph and the shedding condition of air vortex are judged. And if the comparison result shows that the pneumatic noise generated by the pantograph of the high-speed train is greatly increased due to the falling of the airflow vortex, starting the plasma exciter.
Then, the excitation power supply is adjusted, and the input voltage is changed to control the speed of the induced airflow (plasma) generated by the plasma exciter.
And then, the pneumatic noise generated by the pantograph is monitored and fed back in real time through the noise monitoring device, and the optimal excitation condition is selected so as to achieve the optimal noise reduction effect of the high-speed train pantograph.
The embodiment of the invention provides a high-speed train pantograph, which is characterized in that an air flow boundary layer is actively controlled through a plasma exciter, vortex shedding is effectively inhibited, the pneumatic characteristic of the pantograph in the running process of a train is improved, the pneumatic noise generated by the pantograph in the running process of the high-speed train can be reduced, and the purposes of reducing noise and improving the comfort of passengers are achieved.
On the basis of the above embodiments, further, the device further comprises an electrical parameter measuring device, and the electrical parameter measuring device is used for detecting and recording the voltage and the current of the excitation power supply.
Specifically, as shown in fig. 4, the high-speed train pantograph further includes an electrical parameter measuring device for detecting and recording the voltage and current of the excitation power source. The electrical parameter measuring device consists of a Rogowski coil and a PC end. The Rogowski coil in the electrical parameter measuring device is connected with the plasma exciter, and the Rogowski coil is connected with the PC end.
In the actual operation working condition of the high-speed train, the noise generated by the pantograph of the high-speed train is monitored and fed back in real time through the noise monitoring device and is compared with a PC (personal computer) end database, and the separation condition of the air boundary layer of the pantograph and the shedding condition of air vortex are judged. And if the comparison result shows that the pneumatic noise generated by the pantograph of the high-speed train is greatly increased due to the falling of the airflow vortex, starting the plasma exciter.
Then, the excitation power supply is adjusted, and the input voltage is changed to control the speed of the induced airflow (plasma) generated by the plasma exciter. During the regulation, the voltage and current of the excitation power supply are detected and recorded by an electrical parameter measuring device.
And then, the pneumatic noise generated by the pantograph is monitored and fed back in real time through the noise monitoring device, and the optimal excitation condition is selected so as to achieve the optimal noise reduction effect of the high-speed train pantograph.
Fig. 6 is a schematic view of the active control of the plasma exciter on the air flow according to the embodiment of the present invention, as shown in fig. 6, fig. 6 (a) shows the air flow when the plasma exciter is turned off, fig. 6 (b) shows the air flow when the plasma exciter is turned on, and when the plasma exciter is turned off, an air flow vortex shedding situation is formed on the surface of the pantograph slide plate, which causes the separation of the pantograph air flow boundary layer and generates a large aerodynamic noise. When the plasma exciter is started, plasma is formed on the surface of the pantograph slide plate, the plasma can well guide airflow, active control on the airflow is achieved, vortex shedding is effectively inhibited, and noise is reduced.
The embodiment of the invention provides a high-speed train pantograph, which is characterized in that an air flow boundary layer is actively controlled through a plasma exciter, vortex shedding is effectively inhibited, the pneumatic characteristic of the pantograph in the running process of a train is improved, the pneumatic noise generated by the pantograph in the running process of the high-speed train can be reduced, and the purposes of reducing noise and improving the comfort of passengers are achieved.
Fig. 7 is a schematic view of a noise reduction method for a high-speed train pantograph according to an embodiment of the present invention, and as shown in fig. 7, the embodiment of the present invention provides a noise reduction method for a high-speed train pantograph, where the method specifically includes:
step S101, acquiring the volume and/or frequency of noise generated by a pantograph when a train runs;
and S102, adjusting the excitation voltage of a plasma exciter according to the volume and/or frequency of the noise, wherein the plasma exciter is arranged on the windward side of the pantograph slide plate.
Specifically, the high-speed train pantograph comprises a plasma exciter, the plasma exciter is used for generating plasma, airflow is actively controlled through the plasma, and the separation condition of an airflow boundary layer and the vortex shedding condition of the pantograph are eliminated.
The noise monitoring device is used for acquiring the volume and/or frequency of noise generated by the pantograph when the train runs.
The device also comprises an electrical parameter measuring device which is used for detecting and recording the voltage and the current of the excitation power supply. The electrical parameter measuring device consists of a Rogowski coil and a PC end. The Rogowski coil in the electrical parameter measuring device is connected with the plasma exciter, and the Rogowski coil is connected with the PC end.
In the actual operation working condition of the high-speed train, the noise generated by the pantograph of the high-speed train is monitored and fed back in real time through the noise monitoring device and is compared with a PC (personal computer) end database, and the separation condition of the air boundary layer of the pantograph and the shedding condition of air vortex are judged. And if the comparison result shows that the pneumatic noise generated by the pantograph of the high-speed train is greatly increased due to the falling of the airflow vortex, starting the plasma exciter.
Then, the excitation power supply is adjusted, and the input voltage is changed to control the speed of the induced airflow (plasma) generated by the plasma exciter. During the regulation, the voltage and current of the excitation power supply are detected and recorded by an electrical parameter measuring device.
And then, the pneumatic noise generated by the pantograph is monitored and fed back in real time through the noise monitoring device, and the optimal excitation condition is selected so as to achieve the optimal noise reduction effect of the high-speed train pantograph.
According to the noise reduction method for the pantograph of the high-speed train, provided by the embodiment of the invention, the air flow boundary layer is actively controlled through the plasma exciter, vortex shedding is effectively inhibited, the pneumatic characteristic of the pantograph in the running process of the train is improved, the pneumatic noise generated by the pantograph in the running process of the high-speed train can be reduced, and the purposes of reducing noise and improving the comfort of passengers are achieved.
Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 8, the electronic device includes: a processor (processor)801, a memory (memory)802, and a bus 803;
wherein, the processor 801 and the memory 802 complete the communication with each other through the bus 803;
the processor 801 is configured to call program instructions in the memory 802 to perform the methods provided by the above-described method embodiments, including, for example:
acquiring the volume and/or frequency of noise generated by a pantograph when a train runs;
and adjusting the excitation voltage of a plasma exciter according to the volume and/or frequency of the noise, wherein the plasma exciter is arranged on the windward side of the pantograph slide plate.
In addition, the logic instructions in the memory may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Embodiments of the present invention provide a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, enable the computer to perform the methods provided by the above-mentioned method embodiments, for example, including:
acquiring the volume and/or frequency of noise generated by a pantograph when a train runs;
and adjusting the excitation voltage of a plasma exciter according to the volume and/or frequency of the noise, wherein the plasma exciter is arranged on the windward side of the pantograph slide plate.
Embodiments of the present invention provide a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to perform the methods provided by the above method embodiments, for example, the methods include:
acquiring the volume and/or frequency of noise generated by a pantograph when a train runs;
and adjusting the excitation voltage of a plasma exciter according to the volume and/or frequency of the noise, wherein the plasma exciter is arranged on the windward side of the pantograph slide plate.
The above-described embodiments of the apparatuses and devices are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (9)

1. A high speed train pantograph, comprising: a skateboard and a noise monitoring device;
a plasma exciter is arranged on the windward side of the sliding plate;
the side face of the plasma exciter, which is in contact with the sliding plate, completely covers the windward side of the sliding plate;
the upper surface of the plasma exciter comprises a first part which is flush with the upper surface of the sliding plate and a second part which is lower than the upper surface of the sliding plate and is connected with the first part; a lower surface of the plasma actuator is flush with a lower surface of the sled, wherein a second portion of the upper surface of the plasma actuator is inclined toward the lower surface of the plasma actuator;
at least one group of electrodes are laid on the inner side and the outer side of the windward side of the plasma exciter along the unfolding direction of the sliding plate;
the noise monitoring device is used for acquiring the volume of noise generated by a pantograph when a train runs, monitoring and feeding back the noise generated by the pantograph of the high-speed train in real time, comparing the noise with a PC (personal computer) end database, judging the separation condition of an air boundary layer of the pantograph and the falling condition of airflow vortexes, and starting the plasma exciter if the comparison result shows that the pneumatic noise generated by the pantograph of the high-speed train is greatly increased due to the falling of the airflow vortexes.
2. The high speed train pantograph of claim 1, wherein the plasma exciter is glued to the windward side of the skateboard.
3. The high speed train pantograph of claim 1, wherein the set of electrodes of the plasma exciter comprises a bare electrode and an encapsulated electrode.
4. The high-speed train pantograph according to claim 3, wherein a plane of the exposed electrode and a plane of the encapsulated electrode are parallel to each other or form an intersection angle of a predetermined degree with each other.
5. The high-speed train pantograph according to claim 3, wherein the exposed electrode is a strip electrode, the surface of the exposed electrode is a plane or a curved surface, and the surface of the exposed electrode is smooth or has a zigzag groove or a rectangular groove;
the packaging electrode is a strip electrode, the surface of the packaging electrode is a plane or a curved surface, and the surface of the packaging electrode is smooth or is provided with a sawtooth-shaped groove or a rectangular groove.
6. The high speed train pantograph according to claim 3, wherein the excitation power source includes a signal generator, a power amplifier and a step-up transformer;
the signal generator is connected with the power amplifier;
the power amplifier is connected with the boosting transformer;
the first output end of the step-up transformer is connected with the exposed electrode, and the second output end of the step-up transformer is connected with the encapsulated electrode.
7. The high speed train pantograph according to claim 6, further comprising an electrical parameter measuring device for detecting and recording a voltage and a current of the excitation power source.
8. The method for reducing noise of a high-speed train pantograph according to any one of claims 1 to 7, comprising:
acquiring the volume of noise generated by a pantograph when a train runs through a noise monitoring device;
adjusting the excitation voltage of a plasma exciter according to the volume of the noise, wherein the plasma exciter is arranged on the windward side of a sliding plate of the pantograph;
the noise monitoring device monitors and feeds back the noise generated by the pantograph of the high-speed train in real time, compares the noise with a PC (personal computer) end database, judges the separation condition of an air boundary layer of the pantograph and the falling condition of airflow vortexes, and starts the plasma exciter if the comparison result shows that the aerodynamic noise generated by the pantograph of the high-speed train is greatly increased due to the falling of the airflow vortexes.
9. An electronic device, comprising:
the processor and the memory are communicated with each other through a bus; the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of claim 8.
CN201910226063.1A 2019-03-25 2019-03-25 Pantograph of high-speed train and noise reduction method thereof Active CN109968987B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910226063.1A CN109968987B (en) 2019-03-25 2019-03-25 Pantograph of high-speed train and noise reduction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910226063.1A CN109968987B (en) 2019-03-25 2019-03-25 Pantograph of high-speed train and noise reduction method thereof

Publications (2)

Publication Number Publication Date
CN109968987A CN109968987A (en) 2019-07-05
CN109968987B true CN109968987B (en) 2021-04-20

Family

ID=67080371

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910226063.1A Active CN109968987B (en) 2019-03-25 2019-03-25 Pantograph of high-speed train and noise reduction method thereof

Country Status (1)

Country Link
CN (1) CN109968987B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111988900A (en) * 2020-07-21 2020-11-24 中国空气动力研究与发展中心低速空气动力研究所 Application of plasma exciter and infrasonic wave generating method and device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9951800B2 (en) * 2012-08-08 2018-04-24 National Institute Of Advanced Industrial Science And Technology Surface plasma actuator
CN107089238B (en) * 2017-03-23 2020-04-24 西南交通大学 Energy-saving and resistance-reducing method and device for high-speed train
CN109501821B (en) * 2018-12-27 2020-10-09 西南交通大学 High-speed train noise reduction system and method based on plasma flow control

Also Published As

Publication number Publication date
CN109968987A (en) 2019-07-05

Similar Documents

Publication Publication Date Title
Madonna et al. Electrical machines for the more electric aircraft: Partial discharges investigation
EP1659670B1 (en) Arc detection circuit
CN109968987B (en) Pantograph of high-speed train and noise reduction method thereof
CN109501824B (en) High-speed train drag reduction method and device based on plasma
KR20200109925A (en) Apparatus for measuring insulation resistance
RU2695278C1 (en) Method for determining single-phase fault of feeder to ground in medium voltage cable networks
EP3150419B1 (en) Method and a system for reducing the energy consumption of railway systems
US9529034B2 (en) Real-time insulation detector for feeding high-frequency low-voltage signal of power system
JP2021056086A (en) Air flow separation detection method, air flow separation position detection method, air flow separation detection system, and air flow separation position detection system
Driendl et al. Modeling of Partial Discharge Processes in Winding Insulation of Low-Voltage Electrical Machines Supplied by High $\mathrm {du}/\mathrm {dt} $ Inverters
TW202043071A (en) Power conversion controller
CN110716109B (en) Power distribution system
CN104210386B (en) The restraining device of isolated rail joint place Railway wheelset electric arc
US11938986B2 (en) Control device for railway vehicles and disconnection determination method
JP2013110869A (en) Dc feed protective relay device and failure detection method
JP2016056814A (en) Lifting force control device
EP1811539B1 (en) Electrical contactor and associated contactor-closure control method
KR20140005279A (en) Method for identifying arcing faults and circuit breaker
CN113466622A (en) Early fault section positioning method based on active injection
CN108761246A (en) A kind of polymer matrix dielectric barrier discharge plasma driver ageing state observation circuit and monitoring method
KR100823721B1 (en) Electrostatic precipitator using micro pulse
Jung et al. Contact loss simulator to analyze the contact loss of a rigid catenary system
JP4208835B2 (en) Rotor blade for wind turbine
WO2018225137A1 (en) Vehicle control device and inrush current suppression method
Asakura et al. Development of higher-voltage direct current power feeding system in telecommunications buildings and data centers

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant