CN111891171B - Control method and system for main compressor of power-concentrated motor train unit - Google Patents
Control method and system for main compressor of power-concentrated motor train unit Download PDFInfo
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- CN111891171B CN111891171B CN202010793832.9A CN202010793832A CN111891171B CN 111891171 B CN111891171 B CN 111891171B CN 202010793832 A CN202010793832 A CN 202010793832A CN 111891171 B CN111891171 B CN 111891171B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
- B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
- B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
- B61H11/10—Aerodynamic brakes with control flaps, e.g. spoilers, attached to the vehicles
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Abstract
The invention discloses a control method and a control system for a main compressor of a power-concentrated motor train unit, which not only adopt the pressure value of a first main air cylinder of a power vehicle as the start-stop judgment basis of the main compressor, but also adopt the pressure values of a second main air cylinder of the power vehicle and a second main air cylinder of a control vehicle as the start-stop judgment basis of the main compressor, thereby avoiding the situation that the traction lock of a train set is easily triggered due to insufficient total air pressure caused by the fact that the second main air cylinder of the control vehicle is far away from an air source; meanwhile, when the pressure values of the first main air cylinder and the second main air cylinder of the vehicle are higher than the second preset value and the pressure values of the second main air cylinders of other vehicles are higher than the third preset value, the main compressor of the vehicle is controlled to stop, and the problem that the air equipment for the vehicle is damaged due to the fact that the pressure values of the first main air cylinder and the second main air cylinder of the vehicle are too high is solved.
Description
Technical Field
The invention belongs to the technical field of rail transit, and particularly relates to a control method and a control system for a main compressor of a power-concentrated motor train unit.
Background
In recent years, with the development of motor train unit technology, power-concentrated motor train units have begun to be popularized in China due to the advantages of flexible grouping, lower manufacturing, application and overhaul costs than power-dispersed motor train units, higher comfort and the like.
According to the configuration of the power-concentrated motor train unit, only the power vehicle is configured with the main compressor and is positioned at the head end or the tail end of the motor train unit, so that the pressure distribution characteristics of a main air pipe system of the motor train unit are as follows: the further from the wind source (i.e., the main compressor), the lower the total wind pressure; particularly, when the main control of the control vehicle is carried out, the second main air cylinder of the control vehicle is responsible for the air inflation relieving of the train pipe, and the pressure of the main air cylinder is reduced most rapidly. Since each locomotive of other locomotives, such as a multi-locomotive, is provided with a main compressor and a main air cylinder, the problem of insufficient total air pressure caused by the fact that the main air cylinder is far away from an air source does not exist. The power vehicle refers to a vehicle with a traction motor, a pantograph and a driver cab and without a passenger cab, and the control vehicle refers to a vehicle without a traction motor and a pantograph and with a driver cab and a passenger cab.
According to the configuration of the power-concentrated motor train unit, the first main air reservoir and the second main air reservoir have different air supply objects and different air consumption characteristics, and a reverse flow check valve is arranged between the two main air reservoirs, so that the problem that even if a power vehicle has a large pressure difference between the first main air reservoir and the second main air reservoir is solved. For example, in actual operation of a train, a vehicle wind device such as an air spring is always in wind, and the train pipe is mostly out of wind, i.e., a situation in which the first total reservoir pressure is lower than the second total reservoir pressure normally occurs. When the train is braked and the train is relieved, the second total air reservoir charges the train pipe with large flow, and the pressure of the second total air reservoir is lower than that of the first total air reservoir. However, the lack of the total wind pressure has certain risks, which can trigger the traction blocking of the train set and influence the normal operation of the train set.
Therefore, how to safely and effectively control the start and stop of the main compressor according to the total wind pressure of the train set, avoid the situation of insufficient total wind pressure and maintain the normal operation of the train set is a technical problem to be solved by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a control method and a control system for a main compressor of a power-concentrated motor train unit, which aim to solve the problems that the traction blocking of the motor train unit is easily triggered due to insufficient total wind pressure, the normal operation of the motor train unit is influenced and the like.
One or more of the above objects are solved by the solution of the independent claims of the present invention.
The invention solves the technical problems through the following technical scheme: a control method for a main compressor of a power-concentrated motor train unit comprises the following steps:
acquiring pressure values of a first main air reservoir of a power vehicle, a second main air reservoir of the power vehicle and a second main air reservoir of a control vehicle;
judging whether the pressure value of the first main air reservoir of the power vehicle is lower than a first preset value, whether the pressure value of the second main air reservoir of the power vehicle is lower than the first preset value, and controlling whether the pressure value of the second main air reservoir of the power vehicle is lower than the first preset value; if the pressure value of any one of the first main reservoir of the power vehicle, the second main reservoir of the power vehicle and the second main reservoir of the control vehicle is lower than a first preset value, controlling the starting of main compressors of all the power vehicles;
judging whether the pressure value of the first main air cylinder of the vehicle is higher than a second preset value, whether the pressure value of the second main air cylinder of the vehicle is higher than the second preset value, and whether the pressure values of the second main air cylinders of other vehicles are higher than a third preset value; if the pressure values of the first main air cylinder and the second main air cylinder of the vehicle are higher than a second preset value, and the pressure values of the second main air cylinders of other vehicles are higher than a third preset value, controlling a main compressor of the vehicle to stop;
wherein the first preset value is less than the third preset value and less than the second preset value.
The host vehicle is a vehicle corresponding to the main compressor at the time of stop control, and the other vehicles are all vehicles except the host vehicle.
The control method of the main compressor not only adopts the pressure value of the first main air reservoir of the power vehicle as the start-stop judgment basis of the main compressor, but also adopts the pressure values of the second main air reservoir of the power vehicle and the second main air reservoir of the control vehicle as the start-stop judgment basis of the main compressor; when the pressure value of the second main air cylinder of the power vehicle and/or the second main air cylinder of the control vehicle is lower than the first preset value, the main compressor can be started, and the condition that the traction blocking of a train set is easily triggered due to insufficient total air pressure caused by the fact that the second main air cylinder of the control vehicle is far away from an air source is avoided; when the pressure values of the first main air cylinder and the second main air cylinder of the vehicle are both higher than a second preset value, and the pressure values of the second main air cylinders of other vehicles are higher than a third preset value, controlling the main compressor of the vehicle to stop, because a certain pressure difference exists between the first main air cylinder and the second main air cylinder, if the pressure value of the second main air cylinder of other vehicles is higher than a second preset value, the main compressor of the vehicle is controlled to stop, it is possible to make the pressure value inside the first and/or second reservoir of the host vehicle equal to the second preset value + the pressure difference, in order to protect the first main air reservoir and/or the second main air reservoir of the vehicle, the safety valve is opened to realize the air release of the first main air reservoir and/or the second main air reservoir of the vehicle, if the safety valve is not arranged, the equipment can be damaged due to the fact that the pressure resistance value of the wind equipment for the vehicle is exceeded, and the method avoids the problem that the wind equipment for the vehicle is damaged due to the fact that the pressure values of the first main air cylinder and the second main air cylinder of the vehicle are too high.
Further, the first preset value is 750kPa +/-20 kPa, the second preset value is 900kPa +/-20 kPa, the third preset value is the difference between the second preset value and the maximum pressure difference, and the maximum pressure difference is 50 kPa.
Further, the method also comprises the steps of judging whether the pressure value of a second main air cylinder of the power vehicle is higher than a fourth preset value or not and whether the pressure value of a first main air cylinder of the power vehicle is lower than a second preset value or not, and if the pressure value of the second main air cylinder of the power vehicle is higher than the fourth preset value and the pressure value of the first main air cylinder of the power vehicle is lower than the second preset value, judging that a pressure acquisition device of the first main air cylinder of the power vehicle breaks down; wherein the second preset value is less than the fourth preset value.
Further, the fourth preset value is a relief valve opening pressure of a first main reservoir of the vehicle, and the fourth preset value is preferably 930 kPa.
The invention also provides a power concentrated motor train Unit main compressor Control system, which comprises a pressure switch arranged in a first main air cylinder of the power vehicle, a first pressure sensor arranged in a second main air cylinder of the power vehicle, a second pressure sensor arranged in a second main air cylinder of the Control vehicle, a first CCU (Central Control Unit) arranged in the power vehicle and a second CCU arranged in the Control vehicle, wherein the first CCU is a Central Control Unit; the first main reservoir of the power vehicle is communicated with a main compressor of the power vehicle, the first main reservoir of the power vehicle is communicated with a second main reservoir of the power vehicle and a second main reservoir of a control vehicle through a reverse flow check valve, the pressure switch, the first pressure sensor and the main compressor are respectively connected with a first CCU, the second pressure sensor is connected with a second CCU, and the first CCU is in communication connection with the second CCU, and the first CCU and the second CCU are characterized in that:
the second CCU is used for acquiring a pressure value of a second main air cylinder of the control vehicle corresponding to the second CCU, judging whether the pressure value of the second main air cylinder of the control vehicle is lower than a first preset value or not, and sending a first judgment result to the first CCU; judging whether the pressure value of a second main air cylinder of the control vehicle is higher than a third preset value or not, and sending a second judgment result to the first CCU;
the first CCU is used for acquiring pressure values of a first main air reservoir and a second main air reservoir of the power vehicle corresponding to the first CCU, judging whether the pressure value of the first main air reservoir of the power vehicle is lower than a first preset value or not, and whether the pressure value of the second main air reservoir of the power vehicle is lower than the first preset value or not, and controlling all main compressors to start if the pressure value of the first main air reservoir of the power vehicle is lower than the first preset value or the pressure value of the second main air reservoir of the power vehicle is lower than the first preset value or a first judgment result is yes;
the pressure value of the first main air cylinder of the power vehicle is judged to be higher than a second preset value, the pressure value of the second main air cylinder of the power vehicle is judged to be higher than the second preset value, and the pressure value of the second main air cylinder of the power vehicle is judged to be higher than a third preset value; if the pressure value of the first main reservoir of the power vehicle is higher than the second preset value, the pressure value of the second main reservoir of the power vehicle is higher than the second preset value, the pressure values of the second main reservoirs of other power vehicles are higher than the third preset value, and the second judgment result is yes, controlling the main compressor of the power vehicle to stop;
wherein the first preset value is less than the third preset value and less than the second preset value.
Further, the first CCU is further configured to determine whether a pressure value of a second main reservoir of the power vehicle is higher than a fourth preset value, and whether a pressure value of a first main reservoir of the power vehicle is lower than the second preset value, and if the pressure value of the second main reservoir of the power vehicle is higher than the fourth preset value and the pressure value of the first main reservoir of the power vehicle is lower than the second preset value, determine that a pressure switch of the first main reservoir of the power vehicle fails; wherein the second preset value is less than the fourth preset value.
Advantageous effects
Compared with the prior art, the method and the system for controlling the main compressor of the power-concentrated motor train unit not only adopt the pressure value of the first main air cylinder of the power vehicle as the starting and stopping judgment basis of the main compressor, but also adopt the pressure values of the second main air cylinder of the power vehicle and the second main air cylinder of the control vehicle as the starting and stopping judgment basis of the main compressor, thereby avoiding the situation that the traction and blocking of the motor train unit are easily triggered due to insufficient total air pressure caused by the fact that the second main air cylinder of the control vehicle is far away from an air source; meanwhile, when the pressure values of the first main air cylinder and the second main air cylinder of the vehicle are higher than the second preset value and the pressure values of the second main air cylinders of other vehicles are higher than the third preset value, the main compressor of the vehicle is controlled to stop, and the problem that the air equipment for the vehicle is damaged due to the fact that the pressure values of the first main air cylinder and the second main air cylinder of the vehicle are too high is solved.
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 structural diagram of a short-distance compiling motor train unit in the embodiment of the invention;
FIG. 2 is an electrical schematic diagram of a short-circuit multiple unit train in an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a short-compilation reconnection motor train unit in the embodiment of the invention;
fig. 4 is an electrical schematic diagram of the short-compilation reconnection motor train unit in the embodiment of the invention.
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.
The invention provides a control method of a main compressor of a power-concentrated motor train unit, which comprises the following steps:
1. and acquiring pressure values of the first main air reservoir of the power vehicle, the second main air reservoir of the power vehicle and the second main air reservoir of the control vehicle.
As shown in fig. 1, for a short-time-braided motor train unit, which includes a power car, a control car and a plurality of intermediate cars, the power car or the control car is disposed at the head end or the tail end of the motor train unit, if the power car is at the head end, the control car is at the tail end, and if the power car is at the tail end, the control car is at the head end, so that the control car is far away from the wind source (i.e. the main compressor) in the. The control vehicle is internally provided with a vehicle main air cylinder, vehicle electric equipment, an auxiliary air cylinder, a vehicle brake, a second main air cylinder and a locomotive brake, and each section of intermediate vehicle is internally provided with the vehicle main air cylinder, the vehicle electric equipment, the vehicle brake and the auxiliary air cylinder; the main compressor is communicated with a first main air cylinder, the first main air cylinder is respectively communicated with a second main air cylinder of the power vehicle and a second main air cylinder of the control vehicle through two backflow check valves, and the first main air cylinder is also respectively communicated with a main air cylinder of the intermediate vehicle and a main air cylinder of the control vehicle through a plurality of one-way valves; the second main reservoir of the power vehicle is connected with a brake of the power vehicle locomotive, the brake of the power vehicle locomotive is connected with a train pipe, and the train pipe is respectively connected with a vehicle brake, a control vehicle brake and a control vehicle brake of each intermediate vehicle; the main reservoir of the intermediate vehicle is connected with the vehicle wind equipment, and the brake of the intermediate vehicle is connected with the auxiliary reservoir; the main air cylinder of the control vehicle is connected with the air equipment for the control vehicle, the brake machine of the control vehicle is connected with the auxiliary air cylinder, and the brake machine of the control vehicle is connected with the second main air cylinder. The method comprises the following steps that a pressure switch is arranged in a first main air cylinder, the pressure in the first main air cylinder is detected through the pressure switch, a first pressure sensor is arranged in a second main air cylinder of the power vehicle, the pressure in the second main air cylinder of the power vehicle is detected through the first pressure sensor, a second pressure sensor is arranged in the second main air cylinder of the control vehicle, the pressure in the second main air cylinder of the control vehicle is detected through the second pressure sensor, a first CCU is arranged in the power vehicle, a second CCU is arranged in the control vehicle, and the first CCU and the second CCU are control units and are used for data processing and judgment; the pressure switch, the first pressure sensor and the main compressor are respectively connected with the first CCU, the second pressure sensor is connected with the second CCU, and the first CCU and the second CCU are in communication connection through a WTB (wire train bus), as shown in fig. 2.
Only the power vehicle is provided with a main compressor as an air source to supply air to a first main air cylinder, the downstream of the first main air cylinder is divided into 2 paths of air paths, and one path of air path supplies air to the vehicle air equipment through a one-way valve and a vehicle main air cylinder in sequence; the other path of the air flows through a reverse flow check valve, a second main air cylinder, a locomotive brake to supply air, a train pipe to supply air, and a vehicle brake to supply air to an auxiliary air cylinder.
As shown in fig. 3, for the short-braided multi-connected motor train unit, the short-braided motor train unit is at least composed of two short-braided motor train units, the structure of each short-braided motor train unit is as shown in fig. 1, the main air ducts of each short-braided motor train unit are mutually communicated, the train pipes of each short-braided motor train unit are mutually communicated, each motor vehicle is provided with a first CCU, namely, the motor vehicle 1 and the motor vehicle 2 are respectively provided with a first CCU, each control vehicle is provided with a second CCU, namely, the control vehicle 1 and the control vehicle 2 are respectively provided with a second CCU, as shown in fig. 4.
2. And processing and judging the data, and controlling the start and stop of the main compressor according to the processing and judging result.
The first CCU and the second CCU perform data processing and judgment, processed and judged results are uploaded to the WTB, and sharing of the processing and judgment results is achieved, namely the second CCU can obtain the processing and judgment results of the first CCU through the WTB, the first CCU can also obtain the processing and judgment results of the second CCU through the WTB, when multiple sections of power vehicles and multiple sections of control vehicles (as shown in figure 3, a short-compilation and multiple-association motor train units) exist, a plurality of first CCUs and a plurality of second CCUs are correspondingly arranged, the first CCU and the second CCU respectively process data corresponding to the power vehicles and the control vehicles, and then sharing of all processing and judgment results is achieved through the WTB.
As shown in fig. 3 and 4, the first CCU in the powered vehicle 1 processes data fed back by the pressure switch and the first pressure sensor in the powered vehicle 1, and performs determination as to whether the pressure value of the first master reservoir of the powered vehicle 1 is lower than a first preset value and whether the pressure value of the second master reservoir of the powered vehicle 1 is lower than the first preset value, and uploads the processing and determination results to the WTB; a first CCU in the power vehicle 2 processes data fed back by a pressure switch and a first pressure sensor in the power vehicle 2, judges whether the pressure value of a first main air cylinder of the power vehicle 2 is lower than a first preset value or not and whether the pressure value of a second main air cylinder of the power vehicle 2 is lower than the first preset value or not, and uploads the processing and judging results to a WTB; a second CCU in the control vehicle 1 processes data fed back by a second pressure sensor in the control vehicle 1, judges whether the pressure value of a second main air cylinder of the control vehicle 1 is lower than a first preset value or not, and uploads the processing and judging results to a WTB; a second CCU in the control vehicle 2 processes data fed back by a second pressure sensor in the control vehicle 2, judges whether the pressure value of a second main air cylinder of the control vehicle 2 is lower than a first preset value or not, and uploads the processing and judging results to a WTB; by analogy, the first CCU in each power vehicle performs data processing and judgment on the corresponding power vehicle, the second CCU in each control vehicle performs data processing and judgment on the corresponding control vehicle, and all processing and judgment results are uploaded to the WTB, so that sharing of all processing and judgment results is realized.
2.1 Start control of the Main compressor
The first CCU judges whether the pressure value of a first main air reservoir of the power vehicle is lower than a first preset value or not, whether the pressure value of a second main air reservoir of the power vehicle is lower than the first preset value or not, and the second CCU judges whether the pressure value of a second main air reservoir of the control vehicle is lower than the first preset value or not; and if the pressure value of any one of the first main reservoir of the power vehicle, the second main reservoir of the power vehicle and the second main reservoir of the control vehicle is lower than a first preset value, controlling the starting of main compressors of all the power vehicles.
And starting all the main compressors as long as the pressure value of any one of the first main reservoir or the second main reservoir is lower than a first preset value. In the invention, the first total air reservoir comprises a first total air reservoir in each power vehicle, the second total air reservoir comprises a second total air reservoir in each power vehicle and a second total air reservoir in each control vehicle, and the main compressors in all the power vehicles are controlled to be started as long as the pressure value of any one of the total air reservoirs is lower than the first preset value. In this embodiment, the first preset value is 750kPa ± 20 kPa. Because the constant pressure of the train pipe is 600 kPa, theoretically, the first preset value is not lower than 600 kPa, and when the pressure of the main air pipe is lower than 600 kPa, the train pipe cannot be inflated to 600 kPa, so that the brake is applied. The first preset value is set to 750kPa + -20 kPa for the purpose of reserving a margin, and if the first preset value is set to 600 kPa, it may not be time to charge the train pipe by restarting the main compressor when the total pipe pressure is 600 kPa.
2.2 stop control of the Main compressor
The first CCU judges whether the pressure value of the first main reservoir of the vehicle is higher than a second preset value or not, whether the pressure value of the second main reservoir of the vehicle is higher than the second preset value or not, and the first CCU and/or the second CCU judges whether the pressure value of the second main reservoir of the other vehicle is higher than a third preset value or not; if the pressure values of the first main air cylinder and the second main air cylinder of the vehicle are higher than a second preset value, and the pressure values of the second main air cylinders of other vehicles are higher than a third preset value, controlling a main compressor of the vehicle to stop; wherein the first preset value is less than the third preset value and less than the second preset value.
When the main compressor stops, all the main compressors are not controlled to stop at the same time, and the main compressor corresponding to the vehicle is controlled to stop through the pressure values of the first main air cylinder and the second main air cylinder of the vehicle. The host vehicle is a vehicle corresponding to the main compressor at the time of stop control, and the other vehicles are all vehicles except the host vehicle. For example, when the main compressor of the controlled vehicle 1 is stopped, the controlled vehicle 1 is the own vehicle, and the controlled vehicle 1, the controlled vehicle 2, and the vehicle 2 are all other vehicles. When the main compressor stops controlling, all the judgment conditions need to be met at the same time, the judgment conditions include the pressure values of the first main air cylinder and the second main air cylinder of the main vehicle and the pressure values of the second main air cylinders of other vehicles, and as long as the pressure values of the second main air cylinders of the other vehicles are higher than a third preset value (namely when the pressure of the control vehicle or the second main air cylinder of the power vehicle is higher than the third preset value, other main compressors except the control vehicle or the power vehicle are not controlled any more), and the pressure values of the first main air cylinder and the second main air cylinder of the main vehicle are higher than the second preset value, the main compressor of the main vehicle is controlled to stop, and the main compressor of the main vehicle is controlled to stop without needing the pressure values of the second main air cylinders of the other vehicles to be. This is because there is a certain pressure difference between the first main reservoir of the power vehicle and the second main reservoir of the control vehicle, if the pressure value of the second main air cylinder of the control vehicle is higher than a second preset value, the main compressor of the control vehicle is controlled to stop, it is possible to make the pressure value inside the first and/or second reservoir of the host vehicle equal to the second preset value + the pressure difference, in order to protect the first main air reservoir and/or the second main air reservoir of the vehicle, safety valves of the first main air reservoir and/or the second main air reservoir are opened to realize the air release of the first main air reservoir and/or the second main air reservoir of the vehicle, without the safety valve, the equipment may be damaged due to exceeding the pressure resistance value of the wind equipment for the vehicle, therefore, in order to avoid the situation, as long as the pressure value of the second master reservoir of the other vehicle is higher than the third preset value, and controlling the main compressor corresponding to the vehicle to stop by the pressure values of the first main air cylinder and the second main air cylinder of the vehicle.
Taking a short-programming multi-connected motor train unit as an example, the judgment conditions for controlling the stop of the main compressor of the power vehicle 1 are as follows: the pressure value of the first main reservoir of the power vehicle 1 is higher than the second preset value, the pressure value of the second main reservoir of the control vehicle 1 is higher than the third preset value, the pressure value of the second main reservoir of the control vehicle 2 is higher than the third preset value, and the pressure value of the second main reservoir of the power vehicle 2 is higher than the third preset value.
In this embodiment, the second preset value is 900kPa ± 20kPa, and the third preset value is 850 kPa ± 20 kPa. According to a large amount of test data, the maximum pressure difference between the first main air reservoir of the power vehicle and the second main air reservoir of the control vehicle is 46 kPa, therefore, the third preset value is the difference between the second preset value and the maximum pressure difference, the maximum pressure difference value is 50kPa, and the third preset value is 850 kPa +/-20 kPa.
The method for controlling the main compressor of the power-concentrated motor train unit further comprises the following steps: the first CCU judges whether the pressure value of a second main air cylinder of the power vehicle is higher than a fourth preset value or not and whether the pressure value of a first main air cylinder of the power vehicle is lower than the second preset value or not, and if the pressure value of the second main air cylinder of the power vehicle is higher than the fourth preset value and the pressure value of the first main air cylinder of the power vehicle is lower than the second preset value (a pressure switch of the first main air cylinder of the power vehicle still requests a main compressor to start), the pressure switch of the first main air cylinder of the power vehicle is judged to be in fault; wherein the second preset value is less than the fourth preset value.
When the pressure value of the second main reservoir of the power vehicle is higher than the fourth preset value and the pressure value of the first main reservoir of the power vehicle is lower than the second preset value, the pressure switch for collecting the pressure value of the first main reservoir of the power vehicle is considered to be failed, the collected value of the pressure switch is not trusted any more, and fault information is sent out through the first CCU so as to process the fault in time. When the pressure of the second main air cylinder of the power vehicle is charged to the fourth preset value, the pressure of the first main air cylinder of the power vehicle is higher than the fourth preset value at the moment, because the fluid always flows from high pressure to low pressure, and the fault can be effectively identified by the arrangement of the pressure switch fault judgment logic of the first main air cylinder of the power vehicle, the normal control of the main compressor is prevented from being influenced by the error signal of the pressure switch, and the main compressor cannot be normally stopped. Since the opening pressure of the first main reservoir safety valve of the motor vehicle is generally 950kPa ± 20kPa, the fourth preset value is 930 kPa.
As shown in fig. 1-4, the invention further provides a main compressor control system of a power-concentrated motor train unit, which comprises a pressure switch arranged in a first main air cylinder of a power vehicle, a first pressure sensor arranged in a second main air cylinder of the power vehicle, a second pressure sensor arranged in a second main air cylinder of a control vehicle, a first CCU arranged in the power vehicle and a second CCU arranged in the control vehicle; the first main air reservoir of the power vehicle is communicated with a main compressor of the power vehicle, the first main air reservoir of the power vehicle is communicated with a second main air reservoir of the power vehicle and a second main air reservoir of a control vehicle through a reverse flow check valve, the pressure switch, the first pressure sensor and the main compressor are respectively connected with the first CCU, the second pressure sensor is connected with the second CCU, and the first CCU is in communication connection with the second CCU.
The second CCU is used for acquiring a pressure value of a second main air cylinder of the control vehicle corresponding to the second CCU, judging whether the pressure value of the second main air cylinder of the control vehicle is lower than a first preset value or not, and sending a first judgment result to the first CCU; judging whether the pressure value of a second main air cylinder of the control vehicle is higher than a third preset value or not, and sending a second judgment result to the first CCU;
the first CCU is used for acquiring pressure values of a first main air reservoir and a second main air reservoir of the power vehicle corresponding to the first CCU, judging whether the pressure value of the first main air reservoir of the power vehicle is lower than a first preset value or not, and whether the pressure value of the second main air reservoir of the power vehicle is lower than the first preset value or not, and controlling all main compressors to start if the pressure value of the first main air reservoir of the power vehicle is lower than the first preset value or the pressure value of the second main air reservoir of the power vehicle is lower than the first preset value or a first judgment result is yes;
the first CCU is also used for judging whether the pressure value of the first main air reservoir of the power vehicle is higher than a second preset value, whether the pressure value of the second main air reservoir of the power vehicle is higher than the second preset value and whether the pressure value of the second main air reservoir of the power vehicle is higher than a third preset value; if the pressure value of the first main reservoir of the power vehicle is higher than the second preset value, the pressure value of the second main reservoir of the power vehicle is higher than the second preset value, the pressure values of the second main reservoirs of other power vehicles are higher than the third preset value, and the second judgment result is yes, controlling the main compressor of the power vehicle to stop; wherein the first preset value is less than the third preset value and less than the second preset value.
The first CCU is also used for judging whether the pressure value of the second main air reservoir of the power vehicle is higher than a fourth preset value or not, and whether the pressure value of the first main air reservoir of the power vehicle is lower than the second preset value or not, and if the pressure value of the second main air reservoir of the power vehicle is higher than the fourth preset value and the pressure value of the first main air reservoir of the power vehicle is lower than the second preset value, judging that a pressure switch of the first main air reservoir of the power vehicle breaks down; wherein the second preset value is less than the fourth preset value.
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 (6)
1. A control method for a main compressor of a power-concentrated motor train unit is characterized by comprising the following steps:
acquiring pressure values of a first main air reservoir of a power vehicle, a second main air reservoir of the power vehicle and a second main air reservoir of a control vehicle;
judging whether the pressure value of the first main air reservoir of the power vehicle is lower than a first preset value, whether the pressure value of the second main air reservoir of the power vehicle is lower than the first preset value, and controlling whether the pressure value of the second main air reservoir of the power vehicle is lower than the first preset value; if the pressure value of any one of the first main reservoir of the power vehicle, the second main reservoir of the power vehicle and the second main reservoir of the control vehicle is lower than a first preset value, controlling the starting of main compressors of all the power vehicles;
judging whether the pressure value of the first main air cylinder of the vehicle is higher than a second preset value, whether the pressure value of the second main air cylinder of the vehicle is higher than the second preset value, and whether the pressure values of the second main air cylinders of other vehicles are higher than a third preset value; if the pressure values of the first main air cylinder and the second main air cylinder of the vehicle are higher than a second preset value, and the pressure values of the second main air cylinders of other vehicles are higher than a third preset value, controlling a main compressor of the vehicle to stop;
wherein the first preset value is less than the third preset value and less than the second preset value;
the host vehicle is a vehicle corresponding to the main compressor during the stop control, and the other vehicles are all vehicles except the host vehicle.
2. The method for controlling the main compressor of the power-concentrated motor train unit according to claim 1, wherein the method comprises the following steps: the first preset value is 750kPa +/-20 kPa, the second preset value is 900kPa +/-20 kPa, the third preset value is the difference between the second preset value and the maximum pressure difference, and the maximum pressure difference is 50 kPa.
3. The method for controlling the main compressor of the power-concentrated motor train unit according to claim 1 or 2, wherein the method comprises the following steps: the method also comprises the steps of judging whether the pressure value of the second main air cylinder of the power vehicle is higher than a fourth preset value or not, and whether the pressure value of the first main air cylinder of the power vehicle is lower than a second preset value or not; if the pressure value of the second main air reservoir of the power vehicle is higher than the fourth preset value and the pressure value of the first main air reservoir of the power vehicle is lower than the second preset value, judging that a pressure acquisition device of the first main air reservoir of the power vehicle breaks down;
wherein the second preset value is less than the fourth preset value.
4. The method for controlling the main compressor of the power-concentrated motor train unit according to claim 3, characterized in that: the fourth preset value is the opening pressure of a safety valve of a first main air reservoir of the power vehicle.
5. A main compressor control system of a power-concentrated motor train unit comprises a pressure switch arranged in a first main air cylinder of a power vehicle, a first pressure sensor arranged in a second main air cylinder of the power vehicle, a second pressure sensor arranged in a second main air cylinder of a control vehicle, a first CCU arranged in the power vehicle and a second CCU arranged in the control vehicle; the first main reservoir of the power vehicle is communicated with a main compressor of the power vehicle, the first main reservoir of the power vehicle is communicated with a second main reservoir of the power vehicle and a second main reservoir of a control vehicle through a reverse flow check valve, the pressure switch, the first pressure sensor and the main compressor are respectively connected with the first CCU, the second pressure sensor is connected with the second CCU, and the first CCU is in communication connection with the second CCU, and the first CCU is characterized in that:
the second CCU is used for acquiring a pressure value of a second main air cylinder of the control vehicle corresponding to the second CCU, judging whether the pressure value of the second main air cylinder of the control vehicle is lower than a first preset value or not, and sending a first judgment result to the first CCU; judging whether the pressure value of a second main air cylinder of the control vehicle is higher than a third preset value or not, and sending a second judgment result to the first CCU;
the first CCU is used for acquiring pressure values of a first main air reservoir and a second main air reservoir of the power vehicle corresponding to the first CCU, judging whether the pressure value of the first main air reservoir of the power vehicle is lower than a first preset value or not, and judging whether the pressure value of the second main air reservoir of the power vehicle is lower than the first preset value or not; if the pressure value of the first main reservoir of the power vehicle is lower than a first preset value, or the pressure value of the second main reservoir of the power vehicle is lower than a first preset value, or the first judgment result is yes, controlling all the main compressors to start;
the pressure value of the first main air cylinder of the power vehicle is judged to be higher than a second preset value, the pressure value of the second main air cylinder of the power vehicle is judged to be higher than the second preset value, and the pressure value of the second main air cylinder of the power vehicle is judged to be higher than a third preset value; if the pressure value of the first main reservoir of the power vehicle is higher than the second preset value, the pressure value of the second main reservoir of the power vehicle is higher than the second preset value, the pressure values of the second main reservoirs of other power vehicles are higher than the third preset value, and the second judgment result is yes, controlling the main compressor of the power vehicle to stop;
wherein the first preset value is less than the third preset value and less than the second preset value.
6. The main compressor control system of the power concentrated motor train unit according to claim 5, characterized in that: the first CCU is also used for judging whether the pressure value of the second main air reservoir of the power vehicle is higher than a fourth preset value or not, and whether the pressure value of the first main air reservoir of the power vehicle is lower than the second preset value or not, and if the pressure value of the second main air reservoir of the power vehicle is higher than the fourth preset value and the pressure value of the first main air reservoir of the power vehicle is lower than the second preset value, judging that a pressure switch of the first main air reservoir of the power vehicle breaks down;
wherein the second preset value is less than the fourth preset value.
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| JPH0552184A (en) * | 1991-08-23 | 1993-03-02 | Nabco Ltd | Pressure air supply device |
| CN102312828A (en) * | 2011-05-25 | 2012-01-11 | 南车戚墅堰机车有限公司 | Start-stop control method for double air compressor of locomotive |
| CN103498787B (en) * | 2013-10-18 | 2016-05-11 | 南车株洲电力机车有限公司 | A kind of engineering maintenance vehicle main compressor control method and control device thereof |
| CN103661348A (en) * | 2013-12-23 | 2014-03-26 | 成都铁路机电配件厂 | Automatic drainage device of rail vehicle air pipeline system |
| CN204110012U (en) * | 2014-09-24 | 2015-01-21 | 中国北车集团大连机车车辆有限公司 | The total reservoir backflow of locomotive tandem and pressure equaliser |
| CN109383554B (en) * | 2017-08-03 | 2020-05-19 | 中车唐山机车车辆有限公司 | Centralized brake control system and method for control train and brake control system for motor train unit |
| CN207758790U (en) * | 2017-11-20 | 2018-08-24 | 中车唐山机车车辆有限公司 | A kind of train air feed branch automatic throttling gear, train air feed system and train |
| CN109050505B (en) * | 2018-07-10 | 2020-03-13 | 中车大连机车车辆有限公司 | Locomotive wind source system |
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