CN109204009A - Urgent travelling-crane method and system under train suspension system fault condition - Google Patents

Abstract

The invention discloses a kind of urgent travelling-crane method of magnetic-levitation train and systems, after a suspension device, sensor or electromagnet failure in suspension system, the point cannot normally suspend, it falls floating in orbit, suspension system breaks down signal to train controller, and the same side point that train control system controls the same suspension rack of point falls floating, and train is automatically into urgent drive mode, train speed limit decontrols traction current threshold limit value；If four or more suspension control point failures or two electromagnet failures or four sensor faults, that is, when there is two or more suspension rack cisco unity malfunction, control Train Stopping falls floating, unlatching support wheel system, using support wheel system running mode.The present invention improves the reliability of train, reduces failure bring adverse effect to greatest extent, to improve vehicle safety in operation, fundamentally solves the problems, such as that suspension system fault condition Train availability is not high and rescue is difficult.

Description

Emergency driving method and system under fault working condition of train suspension system

Technical Field

The invention relates to the field of rail transit, in particular to an emergency driving method and an emergency driving system for a maglev train under a suspension system fault working condition.

Background

The medium and low speed magnetic suspension train developed at home at present adopts a normal conducting short stator mode, the train is suspended to a certain height by means of electromagnetic attraction, no mechanical contact exists between the train and a ground track, the electromagnetic attraction generates a guiding force, and the traction force generated by a linear motor drives the train to run, so that the adhesion limitation of a wheel-track train is fundamentally overcome.

The magnetic-levitation train has the greatest characteristic of realizing non-contact running, which is the greatest difference and advantage between the magnetic-levitation train and the wheel-rail train, and the greatest advantage of the magnetic-levitation train can become fatal if no reliable running guarantee of a system level exists. The suspension system realizes the stable suspension of the train to a certain height by controlling the electromagnet, so the suspension system is the most core part of the magnetic-levitation train, the working reliability and the availability of the suspension system are the keys influencing the reliable and stable operation of the train, and the shape scheme under the emergency working condition of the suspension system failure is the fundamental guarantee for solving whether the magnetic-levitation train can reliably and safely operate.

The existing emergency driving system and the control method are generally as follows: once the suspension system fails to cause the point to be incapable of normally suspending, the train adopts a dragging mode, so that the electromagnet current at the point is overlarge and easy to burn, and if the train waits for rescue, time and labor are consumed, the operation organization of the whole train is influenced, and the availability of the system is reduced; when the multi-point suspension of the train breaks down, the supporting wheel system is adopted for driving.

Disclosure of Invention

The invention aims to solve the technical problems that aiming at the defects of the prior art, the invention provides an emergency driving method and an emergency driving system under the condition of a suspension system fault of a magnetic-levitation train, which improve the reliability of the train and reduce the adverse effect caused by the fault to the maximum extent, thereby improving the running safety of the train and fundamentally solving the problems of low availability and difficult rescue of the train under the condition of the suspension system fault.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an emergency running method under the fault working condition of a suspension system of a magnetic-levitation train comprises the following steps:

1) when the suspension point has a fault, judging whether the number of the faults of the suspension controller or the suspension sensor is less than or equal to 4 or judging whether the number of the faults of the electromagnet is less than or equal to 2, if so, closing the suspension controller at the same side point of the same suspension frame at the fault point, and entering the step 2); otherwise, applying brake to stop the vehicle, closing the whole section of vehicle suspension controller, releasing the supporting wheels and entering the step 2);

2) entering an emergency driving mode;

3) the train operates at a speed limit according to a preset value;

4) open traction current maximum limit;

5) judging whether the train running speed is less than or equal to a limit value, if so, running the train, and entering the step 6); otherwise, returning to the step 4) after blocking traction;

6) and ending when the train runs to a preset stop point.

An emergency driving system under the fault working condition of a train suspension system comprises:

the processing unit is used for judging whether the number of the faults of the suspension controllers or the suspension sensors is less than or equal to 4 or whether the number of the faults of the electromagnets is less than or equal to 2 when the suspension points have faults, and if so, closing the suspension controllers at the same suspension frame and the same side points of the fault points; otherwise, applying brake to stop the vehicle, closing the whole section of vehicle suspension controller, and releasing the supporting wheels;

the speed limiting module is used for controlling the train to run at a preset speed limit when the train enters an emergency stop mode;

the opening module is used for opening the maximum limit value of the traction current;

the judging module is used for judging whether the train running speed is less than or equal to a limit value or not, if so, the train runs, and when the train runs to a preset stopping point, the operation is finished; otherwise, the operation of the speed limiting module is executed after the traction is blocked.

Compared with the prior art, the invention has the beneficial effects that: the invention improves the reliability of the train, reduces the adverse effect caused by the fault to the maximum extent, thereby improving the running safety of the train and fundamentally solving the problems of low availability and difficult rescue of the train under the fault working condition of the suspension system.

Drawings

FIG. 1 is a block diagram of the system of the present invention;

FIG. 2 is a flow chart of the method of the present invention;

wherein,represents a network control signal;represents a hard-wired signal;representing a feedback signal;showing the hydraulic circuit.

Detailed Description

The main realization process of the invention is that when the suspension system of the train breaks down, the train enters an emergency driving mode, the train limits the speed, releases the maximum limit value of the traction current of the train, controls and closes the same-side suspension controller of the same suspension frame of the fault point to float, and adopts a vertical skid dragging mode to operate; if four or more suspension control point faults or two electromagnet faults or four sensor faults occur, namely two or more suspension frames cannot work normally, the speed of the train is limited, the maximum limit value of the traction current of the train is released, the train is controlled to stop, the supporting wheel system is started, and a supporting wheel driving mode is adopted.

When one of the suspension device, the sensor or the electromagnet in the suspension system breaks down, the point can not suspend normally and falls on the track, the suspension system generates a fault signal to the train control device, the train control system controls the point at the same side of the same suspension frame to fall and float, the train automatically enters an emergency driving mode, the train limits the speed, the maximum limit value of traction current is released, and the train runs by utilizing the sliding friction of the skid device.

If the difference occurs: when four or more suspension control points have faults or two electromagnets have faults or four sensors have faults, namely two or more suspension frames cannot work normally, the train is controlled to stop, fall and float, the supporting wheel system is started, and the supporting wheel system is adopted to drive.

The train control system controls the same side point of the same suspension frame to fall and float, and the main purpose of the train control system is to prevent the electromagnet from being burnt and damaged due to overlarge current caused by bearing of overlarge load during single-point operation.

The emergency running system of the maglev train comprises a train control device, a suspension system, a skid device and a supporting wheel system, wherein the train control device comprises an emergency running module, a control module and a judgment module, and the control module can send control command signals to the suspension system and the supporting wheel system. The command signal and the feedback signal comprise a network signal and a hard wire signal, and the hard wire signal is preferably trusted. The judging module is used for judging whether the speed of the train exceeds a preset value in the emergency driving mode. The train control device can control the train to run according to a preset speed limit value, and if the train speed exceeds the preset speed limit value, the traction is blocked; and if the train speed is lower than the preset speed limit value, recovering the traction. The control of single-point suspension and landing of the suspension system can be realized. The suspension system comprises a suspension controller, a suspension sensor and a suspension electromagnet, can receive the command of the train control device and can feed back a fault signal. The fault signals comprise fault signals of the suspension controller, the suspension sensor and the suspension electromagnet. The skid device is arranged at the bottom of the vehicle suspension frame and is contacted with the F rail sliding surface when the vehicle is in a floating state; when the vehicle is in a normal suspension state, the sliding surface of the F rail is not contacted. The skid device is made of wear-resistant materials, and can realize sliding and dragging at the point when the suspension system cannot normally suspend. The supporting wheel system consists of a supporting wheel hydraulic driving device and a supporting wheel executing device. The hydraulic driving device of the supporting wheel can receive signals released and retracted by a train control system and has a hydraulic driving function. The supporting wheel device is arranged at the bottom of the suspension frame, and the supporting wheel executing device is controlled by the supporting wheel hydraulic driving device to execute a rolling operation function.

Claims (2)

1. An emergency driving method under the fault working condition of a train suspension system is characterized by comprising the following steps:

1) when the suspension point has a fault, judging whether the number of the faults of the suspension controller or the suspension sensor is less than or equal to 4 or judging whether the number of the faults of the electromagnet is less than or equal to 2, if so, closing the suspension controller at the same side point of the same suspension frame at the fault point, and entering the step 2); otherwise, applying brake to stop the vehicle, closing the whole section of vehicle suspension controller, releasing the supporting wheels and entering the step 2);

2) entering an emergency stop mode;

3) the train operates at a speed limit according to a preset value;

4) open traction current maximum limit;

5) judging whether the train running speed is less than or equal to a limit value, if so, running the train, and entering the step 6); otherwise, returning to the step 4) after blocking traction;

6) and ending when the train runs to a preset stop point.

2. The utility model provides an urgent driving system under train suspension system trouble operating mode which characterized in that includes:

the processing unit is used for judging whether the number of the faults of the suspension controllers or the suspension sensors is less than or equal to 4 or whether the number of the faults of the electromagnets is less than or equal to 2 when the suspension points have faults, and if so, closing the suspension controllers at the same suspension frame and the same side points of the fault points; otherwise, applying brake to stop the vehicle, closing the whole section of vehicle suspension controller, and releasing the supporting wheels;

the speed limiting module is used for controlling the train to run at a preset speed limit when the train enters an emergency stop mode;

the opening module is used for opening the maximum limit value of the traction current;

the judging module is used for judging whether the train running speed is less than or equal to a limit value or not, if so, the train runs, and when the train runs to a preset stopping point, the operation is finished; otherwise, the operation of the speed limiting module is executed after the traction is blocked.