WO2018058795A1 - Rail transit vehicle and method and system for adjusting pantograph-catenary contact pressure of rail transit vehicle - Google Patents

Abstract

A method of adjusting a pantograph-catenary contact pressure of a rail transit vehicle comprises the steps of: detecting a current motion status parameter and a current pantograph-catenary contact pressure while the rail transit vehicle is traveling; calculating a theoretical pantograph-catenary contact pressure corresponding to the current motion status parameter according to a predetermined corresponding relationship between the motion status parameter and the pantograph-catenary contact pressure; and adjusting the current pantograph-catenary contact pressure according to a difference between the current pantograph-catenary contact pressure and the theoretical pantograph-catenary contact pressure. Also provided are a system for adjusting a pantograph-catenary contact pressure and a rail transit vehicle using the same. The method and system for adjust the pantograph-catenary contact pressure and the rail transit vehicle using the pressure adjusting system can adjust a current pantograph-catenary contact pressure in real-time to be close to a theoretical pantograph-catenary contact pressure, such that a good current collection status is maintained between a pantograph and a catenary.

Description

Rail transit vehicle and bow network contact pressure regulating method and system thereof

This application claims the priority of the Chinese Patent Application filed on September 30, 2016, the Chinese Patent Office, Application No. 201610874570.2, entitled "A Rail Transit Vehicle and Its Bow Net Contact Pressure Adjustment Method and System", all of which The content is incorporated herein by reference.

Technical field

The invention relates to the technical field of rail transit vehicles, and in particular to a method for adjusting a bow web contact pressure of a rail transit vehicle. The present invention also relates to a bow mesh contact pressure regulating system for a rail transit vehicle and a rail transit vehicle including the above described arch net contact pressure regulating system.

Background technique

As a green, environmentally friendly and efficient transportation mode, rail transit plays an extremely important role in China's transportation system.

The stability, reliability and robustness of rail transit train operations are the main research issues of rail transit R&D engineers. Among them, safe and efficient transfer of electrical energy from the contact network to the electric locomotive terminal is the primary condition for ensuring the normal operation of the train. Typically, rail vehicles draw electrical energy from the catenary through the pantograph of the vehicle at the roof, so proper contact pressure must be maintained between the pantograph and the catenary (referred to as "the bow"). When the contact pressure of the bow net is too small, it is easy to generate off-line and generate arc; when the pressure is too large, it may cause local bending of the contact net, fatigue loss, and shorten the service life.

In the prior art, a single static contact pressure is generally employed to meet the entire operating process speed range. However, when the train is running on the transportation line, its speed must have a large fluctuation range. When the train running speed is low, the bow network contact pressure usually only needs to be maintained within its static pressure fluctuation range, and the influence of the wind speed on the bow pressure can be ignored. However, when the train running speed reaches 200km/h, 300km/h or even higher, in order to ensure good contact, the bow mesh contact pressure has a large fluctuation compared with the static contact pressure.

Therefore, how to maintain the bow network in a good state of flow under different motion states such as starting, accelerating, constant speed, deceleration, and stopping of the train is a technical problem to be solved by those skilled in the art.

Summary of the invention

The object of the present invention is to provide a method for adjusting the pressure of the bow network of a rail transit vehicle, which can It is enough to keep the bow net in a good state of flow under various motion states of the rail transit vehicle. Another object of the present invention is to provide a bow mesh contact pressure adjusting system for a rail transit vehicle, and a rail transit vehicle including the above described arch net contact pressure adjusting system.

To solve the above technical problem, the present invention provides a bow network contact pressure adjustment method for a rail transit vehicle, including:

Detecting a current motion state parameter of the rail transit vehicle during operation and a current bow network contact pressure;

Calculating a theoretical bow network contact pressure corresponding to the current motion state parameter according to a corresponding relationship between the preset motion state parameter and the bow network contact pressure;

The current bow mesh contact pressure is adjusted according to the difference between the current bow mesh contact pressure and the theoretical bow mesh contact pressure.

Preferably, detecting the current motion state parameter of the rail transit vehicle during operation specifically includes:

Detect the current speed of the rail vehicle while it is running.

Preferably, the correspondence between the preset motion state parameter and the bow network contact pressure is specifically:

The relationship between the speed of a rail transit vehicle and the theoretical contact pressure of the bow network.

Preferably, when adjusting the current contact pressure of the net, the method further comprises:

Detecting the current ambient wind speed at the location of the rail transit vehicle;

According to the influence of the current ambient wind speed on the contact pressure of the bow net, the adjustment value of the current contact pressure of the bow net is corrected.

The invention also provides a bow network contact pressure regulation system for a rail transit vehicle, comprising:

a detecting module, configured to detect a current motion state parameter of the rail transit vehicle during operation and a current bow network contact pressure;

a calculation module, configured to calculate a theoretical bow network contact pressure corresponding to the current motion state parameter according to a corresponding relationship between the preset motion state parameter and the bow network contact pressure;

The control module is configured to adjust the current bow mesh contact pressure according to the difference between the current bow mesh contact pressure and the theoretical bow mesh contact pressure.

Preferably, the detecting module specifically includes a speed sensor for detecting a vehicle speed of the rail transit vehicle and a pressure sensor for detecting a current bow web contact pressure.

Preferably, the control module specifically includes a conversion module for converting a difference between a current bow contact pressure and a theoretical bow contact pressure into a corresponding air amount, and according to the conversion The conversion value of the module adjusts the air pressure module of the amount of air in the pantograph airbag.

Preferably, further comprising a wind speed sensor for detecting a current ambient wind speed at which the rail transit vehicle is located, and the wind speed sensor is signally coupled to the control module to correct the effect of the current ambient wind speed on the bow web contact pressure The control module adjusts the current contact pressure of the net.

Preferably, the method further comprises a security module coupled to the detection module for suspending operation of the computing module and the control module upon detecting that the vehicle speed of the rail vehicle is zero or the current bow network contact pressure is zero.

The present invention also provides a rail transit vehicle comprising the arch net contact pressure regulating system of any of the above five.

The method for adjusting the bow network contact pressure of a rail transit vehicle provided by the present invention mainly comprises three steps, namely: detecting a current motion state parameter of the rail transit vehicle during operation and a current bow network contact pressure; according to the preset motion state parameter Corresponding relationship with the contact pressure of the bow net, the theoretical bow net contact pressure corresponding to the current motion state parameter is calculated; the current bow net contact pressure is adjusted according to the difference between the current bow net contact pressure and the theoretical bow net contact pressure. Among them, in the first step, when the rail transit vehicle is running, its motion state parameters and the current bow network contact pressure are constantly changing, and the real-time detection can simultaneously grasp the changes of the two. In the second step, after knowing the current motion state parameters of the rail transit vehicle, the corresponding relationship between the preset motion state parameter and the bow network contact pressure can be referred to, thereby calculating the theory under the current motion state parameter. The bow web contact pressure; apparently, the theoretical bow web contact pressure is the optimum value for maintaining a good flow state between the arch nets on the rail transit vehicle. In the third step, after the theoretical contact pressure of the net is calculated, it can be compared with the detected current contact pressure of the net, so that the difference between the two can be obtained, and then the difference can be obtained according to the difference. The current contact pressure of the bow net is adjusted to gradually approach the theoretical bow net contact pressure, and finally maintain a good contact and flow state between the pantograph and the contact net. Therefore, the method for adjusting the pressure of the arch net contact provided by the present invention can maintain the bow net in a good state of flow under various motion states of the rail transit vehicle.

The beneficial effects of the bow-net contact pressure regulating system and the rail transit vehicle provided by the present invention are as described above.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can obtain other drawings according to the provided drawings without any creative work.

1 is a flow chart of a method for adjusting a bow web contact pressure in a specific embodiment of the present invention;

2 is a block diagram of a bow-net contact pressure adjustment system in a specific embodiment of the present invention;

3 is a structural view of a bow mesh contact pressure adjusting system in a specific embodiment of the present invention.

Among them, in Figure 2 - Figure 3:

Detection module-1, calculation module-2, control module-3, speed sensor-101, pressure sensor-102, conversion module-201, air pressure module-202, wind speed sensor-4, security module-5, filter-6 Swing bow solenoid valve - 7, electronically controlled pressure regulator - 8, safety valve - 9, pressure gauge - 10, check valve - 11.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Please refer to FIG. 1. FIG. 1 is a flow chart of a method for adjusting the contact pressure of a bow net in a specific embodiment of the present invention.

In a specific implementation manner provided by the present invention, the method for adjusting the bow network contact pressure of a rail transit vehicle mainly comprises three steps: detecting a current motion state parameter of the rail transit vehicle during operation and a current bow network contact pressure; According to the corresponding relationship between the preset motion state parameter and the bow network contact pressure, the theoretical bow network contact pressure corresponding to the current motion state parameter is calculated; the current bow network is adjusted according to the difference between the current bow mesh contact pressure and the theoretical bow mesh contact pressure. Contact pressure.

Among them, in the first step, the main content is the detection of relevant parameters of rail transit vehicles. Specifically, when the rail transit vehicle is in operation, its motion state parameters constantly change, and the contact pressure between the pantograph and the catenary on the rail transit vehicle also constantly changes. In this way, by detecting the current motion state parameter of the rail transit vehicle and the current bow network contact pressure, the running condition of the rail transit vehicle can be grasped.

In the second step, after knowing the current motion state parameters of the rail transit vehicle, the corresponding relationship between the preset motion state parameter and the bow network contact pressure can be referred to, thereby calculating the theory under the current motion state parameter. The bow network is in contact with the pressure. Obviously, the theoretical bow web contact pressure is the optimum value for maintaining a good flow state between the arch nets on the rail transit vehicle. Preferably, the correspondence between the preset motion state parameter and the bow network contact pressure may be a function of the vehicle speed of the rail transit vehicle as a function of the theoretical bow network contact pressure. That is, after knowing the speed of the rail transit vehicle, the corresponding theoretical bow network contact pressure can be known from the curve. Of course, since the current motion state parameters of the rail transit vehicle are many, and are not limited to the relationship between the vehicle speed and the bow network contact pressure, the rest, such as the relationship between the vehicle speed, the acceleration and the bow network contact pressure, can also be used.

In the third step, after the theoretical contact pressure of the net is calculated, it can be compared with the detected current contact pressure of the net, so that the difference between the two can be obtained, and then the difference can be obtained according to the difference. The current contact pressure of the bow net is adjusted to gradually approach the theoretical bow net contact pressure, and finally maintain a good contact and flow state between the pantograph and the contact net.

In summary, the bow network contact pressure adjustment method provided by the present invention first detects the current motion state parameter of the rail transit vehicle during operation and the current bow network contact pressure, and secondly calculates the current motion state parameter as a calculation factor corresponding thereto. The theoretical bow net contact pressure, and finally adjust the current bow net contact pressure according to the difference between the current bow net contact pressure and the theoretical bow net contact pressure, so that the current bow net contact pressure gradually approaches the theoretical contact pressure, so in the rail transit vehicle The bow network maintains a good flow state under various motion states.

In addition, when detecting the current motion state parameter of the rail transit vehicle during operation, the current vehicle speed of the rail transit vehicle can be specifically detected. Of course, the acceleration, power and other parameters of the rail transit vehicle can also be detected simultaneously.

In addition, when adjusting the current contact pressure of the net, it is also possible to simultaneously contact the current pressure of the net. Adjust the value to make corrections. Specifically, firstly, the current ambient wind speed of the position of the rail transit vehicle, such as downwind or upwind, wind speed, wind pressure and the like, may be detected, and then according to the influence of the current ambient wind speed on the contact pressure of the bow net, the current contact pressure of the bow net is The adjustment value is corrected. Here, the influence of the current ambient wind speed on the contact pressure of the bow net can be similar to the corresponding relationship between the motion state parameter and the contact pressure of the bow net, and can be a function curve of the wind speed and the pressure fluctuation of the bow net contact.

As shown in FIG. 2, FIG. 2 is a block diagram of a bow-net contact pressure adjusting system according to an embodiment of the present invention.

In a specific embodiment provided by the present invention, the bow network contact pressure regulation system of the rail transit vehicle mainly comprises a detection module 1, a calculation module 2 and a control module 3.

The detection module 1 is mainly used for detecting the current motion state parameter and the current bow network contact pressure when the rail transit vehicle is running. Specifically, the detection module 1 includes a speed sensor 101 and a pressure sensor 102. The speed sensor 101 is mainly used to detect the vehicle speed of the rail transit vehicle, and the pressure sensor 102 is mainly used to detect the bow web contact pressure. Of course, the detection module 1 can also detect parameters such as acceleration, power, and the like of the rail transit vehicle.

The calculation module 2 is connected to the detection module 1 . After detecting the current motion state parameter of the rail transit vehicle and the current bow network contact pressure, the detection module 1 sends the two detection values to the calculation module 2 . Then, the calculation module 2 calculates a theoretical bow network contact pressure corresponding to the current motion state parameter according to the corresponding relationship between the preset motion state parameter and the bow network contact pressure. For example, the calculation module 2 can calculate the theoretical bow network contact pressure according to a preset function curve of the preset vehicle speed and the theoretical bow network contact pressure.

The control module 3 is connected to the calculation module 2, and when the calculation module 2 calculates the theoretical network contact pressure, the value is sent to the control module 3. Then, the control module 3 adjusts the current bow network contact pressure according to the difference between the current bow mesh contact pressure and the theoretical bow mesh contact pressure, so that the current bow mesh contact pressure rapidly approaches the theoretical bow mesh contact pressure. Specifically, the control module 3 can include a conversion module 301 and a pneumatic module 302. The conversion module 301 is mainly used to convert the difference between the current bow mesh contact pressure and the theoretical bow mesh contact pressure into a corresponding air volume value, and the bow mesh contact pressure is determined by the amount of air in the pantograph airbag. The air pressure module 302 is connected to the conversion module 301, and is mainly used for adjusting the amount of air in the pantograph airbag according to the conversion value of the conversion module 301. When the amount of air in the pantograph airbag increases, the contact pressure of the arch net increases, and vice versa. Then decrease.

In addition, in order to improve the adjustment precision of the control module 3 to the current bow mesh contact pressure, the wind speed sensor 4 is added in the embodiment. The wind speed sensor 4 is connected to the control module 3 and is mainly used for detecting the current ambient wind speed of the position where the rail transit vehicle is located, so as to send the detection value to the control module 3, so that the control module 3 contacts the pressure of the bow network according to the current ambient wind speed. Affects the correction of the current bow network contact pressure.

Further, in consideration of operational safety and energy saving, the security module 5 is added in this embodiment. The security module 5 is connected to the detection module 1 and is mainly used for suspending operation of the calculation module 2 and the control module 3 when the detection module 1 detects that the vehicle speed of the rail transit vehicle is zero or the current bow network contact pressure is zero. Specifically, the security module 5 can be a pressure switch or the like.

As shown in FIG. 3, FIG. 3 is a structural diagram of a bow-net contact pressure adjusting system according to a specific embodiment of the present invention.

At the hardware structure level, when the control module 3 adjusts the current contact pressure of the bow network to increase, the control module 3 sends a boost signal to the electronically controlled pressure regulating valve 8, and at this time, the lift solenoid valve 7 is energized, and the compressed air passes through the filter in sequence. 6. The sling solenoid valve 7, the electronically controlled pressure regulating valve 8, and the one-way valve 11 reach the pantograph airbag to generate the raising bow pressure, realize the lifting bow, and increase the contact pressure of the bow net. In this process, the electronically controlled pressure regulating valve 8 controls the raising bow pressure at the current vehicle speed, and the one-way valve 11 controls the raising time. Meanwhile, when the control module 3 adjusts the current bow network contact pressure to decrease, the control module 3 sends a step-down signal to the electronically controlled pressure regulating valve 8, and at this time, the lifter solenoid valve 7 is powered off, and the compressed air in the pantograph airbag passes through The one-way valve 11 and the electronically controlled pressure regulating valve 8 are discharged from the lift solenoid valve 7. The pantograph can realize the bow reduction by its own weight, and reduces the contact pressure of the bow net. In this process, the check valve 11 controls the bowing time.

In addition, a pressure gauge 10 may be provided on the air passage to detect the pressure of the air passage, and a safety valve 9 is added to define the highest safety air pressure to avoid air passage expansion.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but the scope of the invention is to be accorded

Claims (10)

1. A method for adjusting a bow network contact pressure of a rail transit vehicle, comprising:

   Detecting a current motion state parameter of the rail transit vehicle during operation and a current bow network contact pressure;

   Calculating a theoretical bow network contact pressure corresponding to the current motion state parameter according to a corresponding relationship between the preset motion state parameter and the bow network contact pressure;

   The current bow mesh contact pressure is adjusted according to the difference between the current bow mesh contact pressure and the theoretical bow mesh contact pressure.
2. The method according to claim 1, wherein the detecting the current motion state parameter of the rail transit vehicle during operation comprises:

   Detect the current speed of the rail vehicle while it is running.
3. The bow net contact pressure adjusting method according to claim 2, wherein the corresponding relationship between the preset motion state parameter and the bow net contact pressure is:

   The relationship between the speed of a rail transit vehicle and the theoretical contact pressure of the bow network.
4. The method for adjusting the pressure of the yoke contact pressure according to any one of claims 1 to 3, further comprising:

   Detecting the current ambient wind speed at the location of the rail transit vehicle;

   According to the influence of the current ambient wind speed on the contact pressure of the bow net, the adjustment value of the current contact pressure of the bow net is corrected.
5. A bow network contact pressure regulation system for a rail transit vehicle, characterized in that it comprises:

   a detecting module, configured to detect a current motion state parameter of the rail transit vehicle during operation and a current bow network contact pressure;

   a calculation module, configured to calculate a theoretical bow network contact pressure corresponding to the current motion state parameter according to a corresponding relationship between the preset motion state parameter and the bow network contact pressure;

   The control module is configured to adjust the current bow mesh contact pressure according to the difference between the current bow mesh contact pressure and the theoretical bow mesh contact pressure.
6. The arch net contact pressure regulating system according to claim 5, wherein said detecting module comprises specifically a speed sensor for detecting a vehicle speed of the rail transit vehicle and for detecting The current pressure sensor for the contact pressure of the net.
7. The arch net contact pressure regulating system according to claim 6, wherein the control module comprises: for converting a difference between a current bow mesh contact pressure and a theoretical bow mesh contact pressure into a corresponding air amount value. a conversion module, and a gas pressure module that adjusts the amount of air in the pantograph airbag according to the converted value of the conversion module.
8. The arch net contact pressure regulating system according to any one of claims 5 to 7, further comprising an air speed sensor for detecting a current ambient wind speed at which the rail transit vehicle is located, and wherein the wind speed sensor is The control module is connected to the signal to correct the adjustment value of the control module to the current contact pressure of the net according to the influence of the current ambient wind speed on the contact pressure of the net.
9. The arch net contact pressure regulating system according to claim 8, further comprising a signal connection with said detecting module for making it possible to detect that the vehicle speed of the rail transit vehicle is zero or the current bow net contact pressure is zero The computing module and the security module that suspends operation of the control module.
10. A rail transit vehicle comprising the catenary contact pressure regulating system of any of claims 5-9.

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