CN111706496B - Rail vehicle air source system control device and method - Google Patents
Rail vehicle air source system control device and method Download PDFInfo
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- CN111706496B CN111706496B CN202010558771.8A CN202010558771A CN111706496B CN 111706496 B CN111706496 B CN 111706496B CN 202010558771 A CN202010558771 A CN 202010558771A CN 111706496 B CN111706496 B CN 111706496B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/26—Compressed-air systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/002—Air treatment devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/228—Devices for monitoring or checking brake systems; Signal devices for railway vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/16—Filtration; Moisture separation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a control device and a control method for an air source system of a railway vehicle, wherein when the vehicle is powered off, a total air pipe is automatically cut off through an electric control cut-off valve, so that the leakage loss of total air pressure is reduced, and the air blowing time when the vehicle is activated next time is reduced; in the running process of a vehicle, the monitoring of the blowing capacity of the compressor is realized by monitoring the dew point temperature of the dryer and the total air pressure change rate of the total air pipe in real time, and when the dew point temperature is abnormal, the electric control air path switching mechanism is switched to different dryers, compressors and even another set of air source system, so that the quality of output compressed air is ensured; when the change rate of the total wind pressure is abnormal, the sufficient supply of the compressed air is ensured by controlling the action of the electric control cut-off valve or simultaneously opening a plurality of sets of wind source systems.
Description
Technical Field
The invention belongs to the technical field of wind source system control, and particularly relates to a device and a method for controlling a wind source system of a railway vehicle.
Background
Rail vehicles are equipped with wind source systems for generating clean and dry compressed air, and the wind source systems are also used as driving media for vehicle braking systems and other wind equipment (e.g., doors, galleys, toilets, etc.). The brake system is an important subsystem of a vehicle related to driving safety, the operation of key pneumatic valve components of the brake system influences the safe stop of the train, and therefore the storage amount and the quality state of compressed air as a driving medium have important influence on the safe driving of the train. At present, an air source system of a railway vehicle controls the automatic start and stop of a compressor through a pressure switch signal, but states such as the wind blowing capacity and the compressed air quality of the air source system cannot be monitored, and even if the states such as the wind blowing capacity and the compressed air quality can be monitored, emergency treatment measures cannot be automatically started according to the corresponding states, so that the driving safety of the vehicle is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a rail vehicle air source system control device and a rail vehicle air source system control method.
The invention solves the technical problems through the following technical scheme: a rail vehicle air source system control device at least comprises two sets of air source systems, wherein an air outlet of a compressor of each set of air source system is connected with an air inlet of an electric control air path switching mechanism, and an air inlet of a dryer of each set of air source system is connected with an air outlet of the electric control air path switching mechanism; a humidity sensor is arranged on a pipeline between the dryer and the main air cylinder of each air source system, and a pressure sensor and an electric control cut-off valve are arranged on a main air pipe of each air source system; and the electric control gas circuit switching mechanism, the humidity sensor, the pressure sensor and the electric control block valve are respectively electrically connected with the control system.
According to the air source system control device, the dew point temperature of the air source system dryer is detected through the humidity sensor, whether the air source system dryer and the compressor work normally or not is judged according to the dew point temperature, and when the dryer or the compressor work abnormally, the dryer or the compressor is switched to the dryers and compressors of other air source systems or other air source systems through the electric control air path switching mechanism, so that the quality of output compressed air is guaranteed; the pressure of the main air pipe of the air source system is detected through the pressure sensor, the change rate of the total air pressure is calculated according to the pressure, whether the air source system has faults or leakage conditions is judged according to the change rate of the total air pressure, when the faults or the leakage conditions exist, the connection with the previous air source system is disconnected through the electric control block valve, the influence of the faults or the leakage on other air source systems is avoided, if the leakage conditions still exist, a plurality of sets of air source systems are started, the sufficient supply of compressed air is guaranteed, the blowing capacity is guaranteed, the monitoring of the blowing capacity is realized, and the driving safety of a vehicle is improved.
Furthermore, the number of the air source systems is two, the electric control air path switching mechanism is an electric control air path switching valve, and the electric control air path switching valve comprises two air inlets and two air outlets.
The invention also provides a control method of the rail vehicle air source system, which is applied to the control device of the rail vehicle air source system, wherein one set of air source system works in a normal mode, and the specific control method comprises the following steps:
the method comprises the following steps that a humidity sensor collects the humidity value of compressed air in a pipeline between a dryer and a main air reservoir of a current air source system in real time, the collected humidity value is sent to a control system, and the control system calculates the dew point temperature of the compressed air according to the humidity value;
the method comprises the following steps that a pressure sensor collects the pressure value of compressed air in a main air pipe in real time and sends the collected pressure value to a control system, and the control system calculates the change rate of the main air pressure according to the pressure value;
if the dew point temperature of compressed air in a pipeline between the current air source system dryer and the main air cylinder is abnormal, the control system controls the electric control air path switching mechanism to act, cuts off a channel between the current air source system dryer and the current air source system compressor, switches on a channel between any other set of air source system dryer and the current air source system compressor, and simultaneously sends the maintenance early warning information of the current air source system dryer to a microcomputer display screen or directly switches to any other set of air source system;
and if the total wind pressure change rate is lower than the normal value of the total wind pressure change rate in the continuous time period, stopping the current wind source system, starting any other set of wind source system, and simultaneously sending the maintenance early warning information of the current wind source system to the microcomputer display screen.
When the dew point temperature is abnormal, in order to ensure the working rate of the compressor and generally ensure that the dryer fails, the control method preferably considers switching off the dryer of the current air source system, and certainly can also directly switch another set of air source system to work; when the change rate of the total wind pressure is abnormal (leakage or compressor failure exists), the system is directly switched to the other wind source system, and the problem that the compressed air is not supplied enough due to the leakage or compressor failure of the current wind source system is avoided.
Further, after the passage between any other set of air source system dryer and the current air source system compressor is connected, if the dew point temperature of compressed air in a pipeline between the any other set of air source system dryer and the main air cylinder is abnormal, the passage between the any other set of air source system dryer and the current air source system compressor is cut off, the passage between any other set of air source system compressor and the current air source system dryer is connected, and meanwhile, the overhaul early warning information of the current air source system compressor is sent to a microcomputer display screen, or the operation is directly switched to any other set of air source system.
When the dew point temperature is abnormal after the dryer of the current air source system is switched off, the compressor fault is indicated, the previous dryer is switched on, and the compressor of the current air source system is switched off to determine whether the compressor fault exists.
Further, after the passage between the compressor of any other set of air source system and the dryer of the current air source system is connected, if the dew point temperature of the compressed air in the pipeline between the dryer of the current air source system and the main air cylinder is abnormal, the system is directly switched to any other set of air source system to work.
When the dew point temperature is abnormal after the compressor of the current air source system is switched off, the dryer and the compressor are possibly failed at the same time, and the other set of air source system is directly switched to work.
Further, the dew point temperature abnormality means that the dew point temperature exceeds a set temperature value within a duration of 2 hours, and the set temperature value is 5 ℃.
Further, after any other set of air source system is started, if the total air pressure change rate of the total air pipe of the any other set of air source system is lower than the normal value of the total air pressure change rate in a continuous time period, the electric control cut-off valve of the current air source system is controlled to be closed;
and if the total air pressure change rate of the total air pipe of any other set of air source system is still lower than the normal value of the total air pressure change rate in the continuous time period, starting the current air source system while the any other set of air source system works, and controlling an electric control cut-off valve of the current air source system to be opened.
When the system is switched to another wind source system, the abnormality still exists, and the fact that the previous wind source system possibly leaks is indicated, the connection between the other wind source system and the previous wind source system is cut off by closing the electric control cut-off valve of the previous wind source system, and the leakage is avoided. If the change rate of the total air pressure in the total air pipe can not be ensured to be normal, two or even more than two sets of air source systems can be started simultaneously, the pressure value in the total air pipe is ensured to be normal, and the sufficient supply of the compressed air is ensured.
Further, the duration is 1 minute.
Advantageous effects
Compared with the prior art, the device and the method for controlling the air source system of the railway vehicle have the advantages that when the vehicle is powered off, the main air pipe is automatically cut off through the electric control cut-off valve, so that the leakage loss of the total air pressure is reduced, and the air blowing time when the vehicle is activated next time is shortened; in the running process of a vehicle, the monitoring of the blowing capacity of the compressor is realized by monitoring the dew point temperature of the dryer and the total air pressure change rate of the total air pipe in real time, and when the dew point temperature is abnormal, the electric control air path switching mechanism is switched to different dryers, compressors and even another set of air source system, so that the quality of output compressed air is ensured; when the change rate of the total wind pressure is abnormal, the sufficient supply of the compressed air is ensured by controlling the action of the electric control cut-off valve or simultaneously opening a plurality of sets of wind source systems.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic view of a pneumatic connection of a control device of a rail vehicle air source system according to an embodiment of the present invention;
FIG. 2 is an electrical schematic diagram of a rail vehicle wind source system control arrangement in an embodiment of the present invention;
FIG. 3 is a schematic representation of a total wind pressure curve in an embodiment of the present invention;
the air conditioner comprises a compressor A01, a dryer A02, a humidity sensor A03, a total air cylinder A04, a pressure sensor A05, an electric control cut-off valve A06 and an electric control air circuit switching valve A07.
Detailed Description
The technical solutions in the present invention are 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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and 2, the air source system control device for the rail vehicle provided by the invention comprises two sets of air source systems, wherein air outlets of compressors a01-1 and a01-2 of the two sets of air source systems are respectively connected with an air inlet a and an air inlet c of an electric control air channel switching valve a07, and air inlets of dryers a02-1 and a02-2 of the two sets of air source systems are respectively connected with an air outlet b and an air outlet d of an electric control air channel switching valve a 07; a pipeline between a dryer A02-1 and a main air cylinder A04-1 of a first air source system is provided with a humidity sensor A03-1, a pipeline between a dryer A02-2 and a main air cylinder A04-2 of a second air source system is provided with a humidity sensor A03-2, a main air pipe of the first air source system is provided with a pressure sensor A05-1 and an electric control cut-off valve A06-1, and a main air pipe of the second air source system is provided with a pressure sensor A05-2 and an electric control cut-off valve A06-2; the electric control air circuit switching mechanism A07, the humidity sensors (A03-1, A03-2), the pressure sensors (A05-1, A05-2) and the electric control cut-off valves (A06-1, A06-2) are respectively and electrically connected with a control system of the train.
In this embodiment, the electrically controlled gas circuit switching mechanism is an electrically controlled gas circuit switching valve a07 including two gas inlets and two gas outlets, and if more than two sets of wind source systems are included, the electrically controlled gas circuit switching valves with the number of gas inlets and gas outlets corresponding to the number of the wind source systems can be selected. The two sets of air source systems can work independently respectively, and also can work in a cross-matching way by controlling the electric control air path switching valve.
For a locomotive, a wind source system is generally arranged in a mechanical room, for a motor train unit, the wind source system is generally arranged on a roof or a chassis, and no special requirements are required on the installation position. Under normal conditions, one set of air source system can provide enough compressed air for the vehicle, two sets of air source systems are required to work unless the total air consumption is huge, and the corresponding total air pipes of all the air source systems are communicated. Under normal conditions, after a train is activated, a train control system controls all electric control block valves to be conducted (the electric control block valves are not closed under other conditions and are closed only under the conditions of leakage or no train activation), an air inlet a and an air outlet b of an electric control air channel switching valve A07 are communicated, an air inlet c and an air outlet d are communicated, and two sets of air source systems are controlled by the train control system and work independently (can be started on a single day or a double day and the like).
The working principle of the rail vehicle air source system control device is as follows: under normal conditions, assuming that the first air source system works, the air inlet a and the air outlet b of the electrically-controlled air channel switching valve A07 are connected, the humidity sensor A03-1 detects the humidity value of the compressed air in the pipeline between the dryer A02-1 and the master reservoir A04-1 and sends the humidity value to the control system of the train, the control system calculates the dew point temperature of the compressed air in the pipeline between the dryer A02-1 and the master reservoir A04-1 according to the humidity value, if the dew point temperature is abnormal, it indicates that the water content in the compressed air is too much, which may affect the normal operation of the valve components of the brake system (the lower the dew point temperature, the lower the water content in the compressed air), and the dew point temperature is abnormal, which is generally a fault or failure of the dryer, in order to ensure the operating rate of the compressor (the operating rate is the ratio of the operating time to the operating period, lubricating oil emulsification caused by too low working rate), the dryer A02-1 is preferably switched, so that the train control system controls the action of the electrically-controlled gas circuit switching valve A07 to enable the gas inlet a and the gas outlet d of the electrically-controlled gas circuit switching valve A07 to be communicated, the gas inlet c and the gas outlet b are cut off, a wind source system consisting of the compressor A01-1 and the dryer A02-2 works, and maintenance early warning information of the dryer A02-1 is sent to the HMI (human machine interface) of the microcomputer display screen to maintain operation; if the temperature of the dew point of the compressed air in the pipeline between the dryer A02-2 and the main air cylinder A04-2 is still abnormal and is detected by the humidity sensor A03-2 after the switch is made to the dryer A02-2, the reason that the dew point temperature is abnormal is shown to be possible to be the fault of the compressor, the air inlet a and the air outlet d of the electrically controlled air path switching valve A07 are controlled to be cut off, the air inlet c and the air outlet b are communicated, an air source system consisting of the compressor A01-2 and the dryer A02-1 works, and the overhaul early warning information of the compressor A01-1 is sent to the HMI (human machine interface) of the microcomputer display screen; if the dew point temperature of the compressed air in the pipeline between the dryer A02-1 and the main air cylinder A04-1 detected by the humidity sensor A03-1 is still abnormal after the switch is made to the compressor A01-2, which indicates that the reason of the abnormal dew point temperature is probably caused by the compressor and the dryer, the work of the first set of air source system is stopped, the work of the second set of air source system is started, and meanwhile, the overhaul early warning information of the compressor A01-1 and the dryer A02-1 is sent to the microcomputer display screen HMI.
Whether the water content of the compressed air meets the requirements or not is judged through the dew point temperature, so that the quality of the compressed air is monitored, when the dew point temperature is abnormal or the quality of the compressed air is abnormal, the electric control gas circuit switching valve A07 is controlled to act, different air source systems are combined to maintain the normal operation of a locomotive, the quality of the compressed air is ensured, meanwhile, which equipment has a fault is checked out, corresponding faults are timely overhauled according to overhaul early warning information, and the driving safety of a vehicle is ensured.
Under normal conditions, the first air source system works, the pressure value of compressed air in the main air pipe 1 is detected through a pressure sensor A05-1, the change rate of the total air pressure is calculated according to the pressure value, if the change rate of the total air pressure of the compressed air in the main air pipe 1 is lower than the normal value of the change rate of the total air pressure in a continuous time period, the first air source system stops working, an air inlet a and an air outlet b of an electric control air path switching valve A07 are controlled to be cut off, an air inlet c and an air outlet d are communicated, the second air source system is directly switched to work, and meanwhile, first air source system maintenance early warning information is sent to a microcomputer display screen HMI; if the total air pressure change rate of the compressed air in the main air pipe 2 detected by the pressure sensor A05-2 is still lower than the normal value of the total air pressure change rate in the continuous time period after the second air source system works, indicating that the first air source system is likely to leak, controlling an electric control cut-off valve A06-1 of the first air source system to close, cutting off the connection with the first air source system, and avoiding the abnormal total air pressure change rate caused by the leakage of the first air source system; if the total air pressure change rate of the compressed air in the total air pipe 2 is detected by the pressure sensor A05-2 to be lower than the normal value of the total air pressure change rate in a continuous time period after the electric control cut-off valve A06-1 is closed, under the condition that the second air source system works, the air inlet a and the air outlet b of the electric control air path switching valve A07 are controlled to be communicated, the first air source system is started, the electric control cut-off valve A06-1 is controlled to be communicated, the two air source systems work to provide sufficient compressed air, and meanwhile, the overhaul early warning information of the first air source system and the second air source system is sent to the microcomputer display screen HMI; if the pressure sensor A05-1 detects the pressure value of the compressed air in the main air duct 1 and the pressure sensor A05-2 detects that the total air pressure change rate of the compressed air in the main air duct 2 is still lower than the normal value of the total air pressure change rate (the main air duct 1 is communicated with the main air duct 2) in a continuous time period after the two sets of air source systems work, the train control system sends a major fault of the air source systems to the microcomputer display screen HMI to prompt a driver to enter a station and stop for rescue.
Whether a fault or leakage exists is judged by detecting the total air pressure change rate of compressed air in a total air pipe through a pressure sensor, and when the fault or leakage exists, whether the fault or leakage exists in the previous air source system is judged by controlling the closing of the electric control cut-off valve A06, sufficient compressed air is provided for a vehicle, the air blowing capacity of the air source system is ensured, and the driving safety of the vehicle is improved; when the abnormal condition still exists, the two sets of wind source systems are started, so that the wind blowing capacity of the wind source systems is further ensured, and the driving safety of the vehicle is improved.
When the train is quitted from operation and is closed and activated, the train control system automatically controls all the electric control cut-off valves A06 to be closed, so that the leakage of compressed air stored in the main air reservoir A04 is reduced, the loss of the wind blowing capacity is reduced, the wind blowing time when the train is activated next time is reduced, and the operation cost is reduced.
The air blowing capacity refers to the exhaust pressure of the air outlet when the compressor works, and the air blowing time refers to the time required by the compressor to start working until the exhaust pressure of the air outlet of the compressor reaches a normal value.
The invention also provides a control method of the rail vehicle air source system, which is applied to the control device of the rail vehicle air source system, wherein in a normal mode, one set of air source system works (a first set of air source system works), and the specific control method comprises compressed air quality control and wind blowing capacity control;
the compressed air quality control process comprises the following steps: the humidity sensor A03-1 collects the humidity value of compressed air in a pipeline between the current air source system dryer A02-1 and the total air reservoir A04-1 in real time, the collected humidity value is sent to the control system, and the control system calculates the dew point temperature of the compressed air according to the humidity value.
If the dew point temperature of compressed air in a pipeline between the current air source system dryer A02-1 and the main air reservoir A04-1 is abnormal, the control system controls the electric control air path switching valve A07 to act, a channel between the current air source system dryer A02-1 and the current air source system compressor A01-1 is cut off, a channel between the other set of air source system dryer A02-2 and the current air source system compressor A01-1 is connected, and meanwhile, overhaul early warning information of the current air source system dryer A02-1 is sent to a microcomputer display HMI (human machine interface) or is directly switched to the other set of air source system to work.
When a channel between the other air source system dryer A02-2 and the current air source system compressor A01-1 is connected, if the dew point temperature of compressed air in a pipeline between the other air source system dryer A02-2 and the total air cylinder A04-2 is still abnormal, the channel between the other air source system dryer A02-2 and the current air source system compressor A01-1 is cut off, the channel between the other air source system compressor A01-2 and the current air source system dryer A02-1 is connected, and meanwhile, overhaul early warning information of the current air source system compressor A01-1 is sent to a microcomputer display screen HMI (human machine interface machine), or the current air source system is directly switched to the other air source system to work. When the dew point temperature is abnormal after the dryer A02-1 of the current air source system is switched off, which indicates that the compressor A01-1 of the current air source system possibly has a fault, the dryer A02-1 of the current air source system is switched on, and the compressor A01-1 of the current air source system is switched off to determine whether the compressor A01-1 has the fault.
When the passage between the other air source system compressor A01-2 and the current air source system dryer A02-1 is connected, if the dew point temperature of compressed air in a pipeline between the current air source system dryer A02-1 and the total air cylinder A04-1 is still abnormal, the other air source system is directly switched to work, and meanwhile, overhaul early warning information of the current air source system compressor A01-1 and the dryer A02-1 is sent to the HMI. When the dew point temperature is abnormal after the compressor A01-1 of the current air source system is switched off, the fact that the dryer A02-1 and the compressor A01-1 are failed at the same time is possible, and the other set of air source system is directly switched to work. In this embodiment, the abnormal dew point temperature means that the dew point temperature exceeds a set temperature value within a duration of 2 hours, and the set temperature value is 5 ℃.
The control process of the wind blowing capacity comprises the following steps: the method comprises the steps that a pressure sensor A05-1 collects the pressure value of compressed air in a main air pipe of a current air source system in real time, the collected pressure value is sent to a control system, and the control system calculates the change rate of the total air pressure according to the pressure value;
if the pressure value of the total air pipe 1 of the current air source system is abnormal, the current working air source system is stopped (the compressor A01-1 and the dryer A02-1 stop working), and another set of air source system is started to work (the compressor A01-2 and the dryer A02-2 are started). And (3) eliminating the current air source system dryer A02-1 fault according to the dew point temperature, or eliminating the compressor A01-1 fault or leakage of the first set of air source system according to the total air pressure change rate.
After the other set of air source system is started, if the total air pressure change rate of the total air pipe 2 of the other set of air source system is lower than the normal value of the total air pressure change rate in a continuous time period, as shown in fig. 3 (a solid line represents a normal time-pressure change curve, and a dotted line represents an abnormal time-pressure change curve), controlling the electric control shut-off valve A06-1 of the current air source system to be closed; and if the total wind pressure change rate of the total wind pipe 2 of the other set of wind source system is still lower than the normal value of the total wind pressure change rate in the continuous time period, starting the current wind source system while the other set of wind source system works, and controlling the electrically-controlled cut-off valve A06-1 of the current wind source system to be opened.
When the abnormality still exists after the system is switched to the other wind source system, the fact that the previous wind source system is possible to leak is indicated, and the connection between the other wind source system and the previous wind source system is cut off by closing the electrically-controlled cut-off valve A06-1 of the previous wind source system, so that the leakage is avoided. If the normal pressure value in the main air pipe still can not be ensured, the current air source system is started when the other set of air source system works, the normal pressure value in the main air pipe is ensured, and the sufficient supply of the compressed air is ensured.
Each sampling period can obtain a total wind pressure value, the ratio of the difference between the total wind pressure value of the nth sampling period and the total wind pressure value of the mth sampling period to the difference between the nth sampling period and the mth sampling period is the total wind pressure change rate, n is not equal to m, and the total wind pressure change rates of the train under different working conditions are different, so that the judgment of whether the total wind pressure is normal or not by adopting the total wind pressure change rate in a continuous time period is more accurate, the duration time is 1 minute in the embodiment, the normal value of the total wind pressure change rate refers to the total wind pressure change rate in a total wind pipe when the compressor works normally and a wind source system does not leak, and the normal value of the total wind pressure change rate can be measured and calculated.
When the dew point temperature and the pressure value are simultaneously abnormal, the control based on the pressure value is taken as the main control, firstly, the sufficient supply of the compressed air is ensured, and then, the quality of the compressed air is ensured.
The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or modifications within the technical scope of the present invention, and shall be covered by the scope of the present invention.
Claims (7)
1. A rail vehicle air source system control method is characterized in that: the air source system control device for the rail vehicle at least comprises two air source systems, wherein an air outlet of a compressor of each air source system is connected with an air inlet of the electric control air path switching mechanism, and an air inlet of a dryer of each air source system is connected with an air outlet of the electric control air path switching mechanism; a humidity sensor is arranged on a pipeline between the dryer and the main air cylinder of each air source system, and a pressure sensor and an electric control cut-off valve are arranged on a main air pipe of each air source system; the electric control gas circuit switching mechanism, the humidity sensor, the pressure sensor and the electric control block valve are respectively electrically connected with the control system;
in a normal mode, one set of air source system works, and the specific control method comprises the following steps:
the method comprises the following steps that a humidity sensor collects the humidity value of compressed air in a pipeline between a dryer and a main air reservoir of a current air source system in real time, the collected humidity value is sent to a control system, and the control system calculates the dew point temperature of the compressed air according to the humidity value;
the method comprises the following steps that a pressure sensor collects the pressure value of compressed air in a main air pipe in real time and sends the collected pressure value to a control system, and the control system calculates the change rate of the main air pressure according to the pressure value;
if the dew point temperature of compressed air in a pipeline between the current air source system dryer and the main air cylinder is abnormal, the control system controls the electric control air path switching mechanism to act, cuts off a channel between the current air source system dryer and the current air source system compressor, switches on a channel between any other set of air source system dryer and the current air source system compressor, and simultaneously sends the maintenance early warning information of the current air source system dryer to a microcomputer display screen or directly switches to any other set of air source system;
and if the total wind pressure change rate is lower than the normal value of the total wind pressure change rate in the continuous time period, stopping the current wind source system, starting any other set of wind source system, and simultaneously sending the maintenance early warning information of the current wind source system to the microcomputer display screen.
2. The rail vehicle wind source system control method according to claim 1, characterized in that: the air source system is provided with two sets, the electric control air path switching mechanism is an electric control air path switching valve, and the electric control air path switching valve comprises two air inlets and two air outlets.
3. The rail vehicle wind source system control method according to claim 1, characterized in that: after the passage between any other set of air source system dryer and the current air source system compressor is connected, if the dew point temperature of compressed air in a pipeline between the any other set of air source system dryer and the main air cylinder is abnormal, the passage between the any other set of air source system dryer and the current air source system compressor is cut off, the passage between any other set of air source system compressor and the current air source system dryer is connected, and meanwhile, the overhaul early warning information of the current air source system compressor is sent to a microcomputer display screen, or the operation is directly switched to any other set of air source system.
4. The rail vehicle wind source system control method according to claim 3, characterized in that: and when the passage between the compressor of any other set of air source system and the current air source system dryer is connected, if the dew point temperature of the compressed air in the pipeline between the current air source system dryer and the main air cylinder is abnormal, directly switching to any other set of air source system to work.
5. The rail vehicle wind source system control method according to any one of claims 1 to 4, wherein: the dew point temperature abnormality means that the dew point temperature exceeds a set temperature value within a duration of 2 hours, and the set temperature value is 5 ℃.
6. The rail vehicle wind source system control method according to claim 1, characterized in that: after any other set of air source system is started, if the total air pressure change rate of the total air pipe of any other set of air source system is lower than the normal value of the total air pressure change rate in a continuous time period, controlling the electric control block valve of the current air source system to close;
and if the total air pressure change rate of the total air pipe of any other set of air source system is still lower than the normal value of the total air pressure change rate in the continuous time period, starting the current air source system while the any other set of air source system works, and controlling an electric control cut-off valve of the current air source system to be opened.
7. The rail vehicle wind source system control method according to claim 1 or 6, characterized in that: the duration is 1 minute.
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| CN114517784B (en) * | 2020-11-19 | 2023-03-14 | 比亚迪股份有限公司 | Air compressor control system and method and vehicle |
| CN112879266B (en) * | 2021-02-08 | 2022-07-19 | 中车株洲电力机车有限公司 | Urban rail vehicle compressor control method and system |
| CN113734131B (en) * | 2021-09-17 | 2022-11-08 | 中车株洲电力机车有限公司 | Locomotive, wind source system and control method thereof |
| CN114312719B (en) * | 2021-11-30 | 2023-01-20 | 中车株洲电力机车有限公司 | System and method for detecting parking brake state of locomotive |
| CN114607593A (en) * | 2022-03-07 | 2022-06-10 | 中车青岛四方机车车辆股份有限公司 | Air compressor working state monitoring method and system, storage medium, equipment and vehicle |
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