CN113734131A - Locomotive, wind source system and control method thereof - Google Patents
Locomotive, wind source system and control method thereof Download PDFInfo
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- CN113734131A CN113734131A CN202111090239.9A CN202111090239A CN113734131A CN 113734131 A CN113734131 A CN 113734131A CN 202111090239 A CN202111090239 A CN 202111090239A CN 113734131 A CN113734131 A CN 113734131A
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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
- B60T17/004—Draining and drying devices
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- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a locomotive, a wind source system and a control method thereof, and relates to the technical field of rail transit vehicle braking. The system comprises a first air source system, a second air source system, a first valve, a second valve, a third valve, a fourth valve and a fifth valve which are connected in parallel. The first air source system comprises a first compressor and a first dryer connected behind the first compressor, and the second air source system comprises a second compressor and a second dryer connected behind the second compressor. When one of the dryers fails, the first valve, the second valve, the third valve, the fourth valve and the fifth valve are controlled to realize automatic switching among the dryers, and the other dryer is used for drying the compressed air output by the compressor.
Description
Technical Field
The invention relates to the technical field of rail transit vehicle braking, in particular to a locomotive, a wind source system and a control method thereof.
Background
The dryer is a post-treatment device for compressed air of the existing rolling stock, and the compressed air generated by the compressor is dried, deoiled and dedusted, so that clean compressed air is provided for the rolling stock pneumatic equipment, and the rear pneumatic equipment is prevented from being corroded by water, dust and oil to influence the functions of the system and parts.
Each rolling stock is generally provided with two compressors, and the output end of each compressor is provided with a drier for treating compressed air. One compressor and one drier constitute one single wind source system, so that two independent wind source systems are provided for common locomotive.
The patent document with publication number CN207631273U discloses a locomotive wind source system, in which a bypass branch is arranged at the connection between a dryer and a compressor, and the bypass device is used for comparing the pressure of an air inlet and an air outlet of the dryer. The bypass branch comprises a bypass device with an electric feedback contact, a one-way valve and a plurality of pipelines. When the dryer breaks down, the pressure difference between the air inlet and the air outlet is larger than a preset threshold value, the internal film of the bypass device moves, and the bypass device is conducted. That is, the bypass device can directly communicate with the input and output of the dryer, and the compressed air can directly enter the rear system.
Therefore, compressed air is directly output to a rear system without being processed, and after moisture and oil contamination impurities in the air enter pneumatic devices such as rear valves, the problems of equipment corrosion, valve clamping stagnation and the like are easily caused, so that the system failure rate is increased and even the safe operation of the locomotive is influenced.
Disclosure of Invention
The invention aims to solve the technical problem that the prior art is insufficient, and provides a locomotive, an air source system and a control method thereof.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a wind source system of a locomotive comprises a first wind source system and a second wind source system which are in parallel, wherein the first wind source system comprises a first compressor and a first dryer connected behind the first compressor, and the second wind source system comprises a second compressor and a second dryer connected behind the second compressor. Also included are a first valve, a second valve, a third valve, a fourth valve, and a fifth valve. The third valve includes two inputs, one of which is at a higher pressure and is open. The fifth valve comprises an input end and two output ends, and the two output ends of the fifth valve are conducted only when gas enters the input end of the fifth valve. The output end of the first compressor is connected with the input end of the first valve, and the output end of the second compressor is connected with the input end of the second valve; the output end of the first valve and the output end of the second valve are respectively connected to the two input ends of the third valve; the output end of the third valve is connected with the input end of the fourth valve; the output end of the fourth valve is connected with the input end of the fifth valve; and two output ends of the fifth valve are respectively connected with the input end of the first dryer and the input end of the second dryer.
When the first air source system works, compressed gas enters the input end of the first dryer from the output end of the first compressor, and then the output end of the first dryer enters the rear system; when the first dryer is in failure, after the system receives a failure signal, the system controls the second dryer to start working, and simultaneously controls the first valve and the fourth valve to be opened and the second valve to be closed, the compressed air generated by the first compressor enters an input end of a third valve through the first valve, and the air pressure of the input end of the third valve connected with the first valve is larger than the air pressure of the input end of the third valve connected with the second valve, the output of the third valve is in communication with the input of the first valve adjacent to the input of the first valve, and compressed air enters the input of the fifth valve through the fourth valve, both outputs of the fifth valve being conductive, the compressed air generated by the first compressor can enter the second dryer through the fifth valve, and the compressed air is processed by the second dryer and then enters the rear system. And the second wind source system or when the two wind source systems work, the same is true.
Specifically, a first one-way valve and a second one-way valve are further included, an input of the first one-way valve and an input of the first valve being coupled to the output of the first compressor, an output of the first one-way valve and the fifth valve being proximate to the output of the first compressor and being coupled between the inputs of the first dryer; an input of the second one-way valve and an input of the second valve are coupled in parallel to an output of the second compressor, and an output of the second one-way valve and the fifth valve are proximate to an output of the second compressor and are coupled in parallel to an input of the second dryer.
The first one-way valve and the second one-way valve can ensure that the air flow direction is from the compressor to the dryer, compressed air is prevented from flowing back to the compressor which is not in the working state after normal and fault redundancy switching, and the compressor which is not in the working state is prevented from being started with load, so that the purpose of protecting the compressor which is not in the working state is achieved.
In particular, the third valve is a two-way pressure comparison valve.
Specifically, the first valve, the second valve and the fourth valve are all electro-pneumatic valves. The on-off of the first valve, the second valve and the fourth valve can be controlled through electric signals, and the automation is improved.
Specifically, the fifth valve is a cut-off valve.
Based on the same technical concept, the invention also provides a control method of the wind source system, which comprises the following steps:
i, controlling the first valve, and de-energizing the second valve and the fourth valve;
II, detecting whether the first dryer and the second dryer have feedback fault signals, if so, entering a step III, and if not, continuously detecting whether the first dryer and the second dryer have the fault signals;
III, judging which dryer fails, if so, entering a step IV, and if so, entering a step V;
IV, sending a working instruction to a second dryer, controlling the first valve and the fourth valve to be electrified, and controlling the second valve to be deenergized;
and V, sending a working command to the first dryer, controlling the second valve and the fourth valve to be electrified, and controlling the first valve to be deenergized.
Compared with the prior art, the invention has the beneficial effects that: when one of the dryers of the air source system fails, the compressed gas is automatically switched to the input end of the other dryer by controlling the on-off of the air path, so that the compressed gas enters the rear system after being processed by the dryers, and the problems that in the prior art, after moisture and oil contamination impurities in the air enter pneumatic devices such as rear valves and the like, equipment corrosion, valve clamping stagnation and the like are easily caused, the system failure rate is increased, and the safe operation of a locomotive is even influenced can be solved. The reliability of the air source system is greatly improved, and the damage of dryer faults to rear equipment is reduced. In addition, the invention only needs to install a valve on the original gas circuit, has stronger operability and practicability, simple principle and wide application range.
Drawings
Fig. 1 is a gas path structure diagram according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating control commands and feedback signals according to an embodiment of the present invention.
Fig. 3 is a flowchart of a control method according to an embodiment of the invention.
Wherein, C1 is the first compressor, C2 is the second compressor, D1 is the first dryer, D2 is the second dryer, S1 is the first valve, S2 is the second valve, S3 is the third valve, S4 is the fourth valve, S5 is the second valveless, S6 is the first check valve, S7 is the second check valve, R1 is the master cylinder.
Detailed Description
As shown in fig. 1, a locomotive of an embodiment of the present invention includes a wind source system including a first wind source system CD1 including a first compressor C1 followed by a first dryer D2 and a second wind source system CD2 in parallel, including a second compressor C2 followed by a second dryer D2. The output ends of the first dryer D1 and the second dryer D2 are connected to a general style R1.
As shown in fig. 1, the wind power system according to the embodiment of the present invention further includes a first valve S1, a second valve S2, a third valve S3, a fourth valve S4, and a fifth valve S5.
The third valve S3 is a two-way pressure comparison valve and includes two inputs, one of which is open.
The first valve S1, the second valve S2 and the fourth valve S4 are all electro-pneumatic valves. The first valve S1, the second valve S2 and the fourth valve S4 can be controlled by electric signals.
The fifth valve S5 is a cut-off control valve, and includes an input end and two output ends, the input end is the control end of the fifth valve S5, that is, the two output ends of the fifth valve are conducted only when there is gas entering the input end of the fifth valve.
The output of the first compressor C1 is connected to the input of the first valve S1, and the output of the second compressor C2 is connected to the input of the second valve S2; the output end of the first valve S1 and the output end of the second valve S2 are respectively connected to two input ends of the third valve S3; the output of the third valve S3 is connected to the input of the fourth valve S4; the output of the fourth valve S4 is connected to the input of the fifth valve S5; two output ends of the fifth valve S5 are respectively connected to the input end of the first dryer D1 and the input end of the second dryer D2.
As shown in fig. 1, the wind source system of an embodiment of the present invention further includes a first check valve S6 and a second check valve S7. An input of the first check valve S6 is coupled to an input of the first valve S1 and to an output of the first compressor C1, and an output of the first check valve S6 is coupled to the fifth valve S5 proximate to an output of the first compressor C1 and between inputs of the first dryer D1. An input of the second check valve S7 is coupled to an input of the second valve S2 and to an output of the second compressor C2, and an output of the second check valve S2 is coupled to and between an input of the second dryer D2 and an output of the fifth valve S5 proximate to an output of the second compressor C2. The first check valve S6 and the second check valve S7 can ensure that the airflow direction is from the compressor to the dryer, prevent compressed air from flowing back to the compressor which is not in the working state during normal work and fault switching, and prevent the compressor which is not in the working state from being started with load, so as to protect the compressor.
As shown in fig. 2 and 3, the control of the wind source system according to an embodiment of the present invention is performed by a control system of a locomotive, and the method includes the following steps:
i, controlling the first valve S1, the second valve S2 and the fourth valve S4 to lose power;
II, detecting whether a fault signal is fed back to the first dryer D1 and the second dryer D2, if so, entering the step III, and if not, continuously detecting whether a fault signal is fed back to the first dryer D1 and the second dryer D2;
III, judging which dryer fails, if so, entering the step IV, and if so, entering the step V, and otherwise, entering the step D1;
IV, sending a work order to a second dryer D2, controlling the first valve S1 and the fourth valve S2 to be electrified, and controlling the second valve S2 to be de-electrified;
v, sending a work order to the first dryer D1, controlling the second valve S2 and the fourth valve S4 to be energized, and the first valve S1 to be de-energized.
Under normal conditions, when the first air source system CD1 works, the first valve S1, the second valve S2 and the fourth valve S4 lose power, compressed air enters the first one-way valve S6 from the output end of the first compressor D1, then enters the input end of the first dryer D1, and enters the main air reservoir R1 through the output end of the first dryer D1 after being processed, and the output end of the main air reservoir R1 is connected with a rear system.
When the first dryer D1 has a fault, after the system receives a fault signal, the system controls the second dryer D2 to start working, and controls the first valve S1 and the fourth valve S4 to be powered on, the second valve S2 to be powered off, the first valve S1 and the fourth valve S4 to be switched on, the second valve S2 is closed, compressed air generated by the first compressor C1 enters the first valve S1, at this time, the input air pressure at the connection part of the third valve S3 and the first valve S1 is greater than the input air pressure at the connection part of the third valve S3 and the second valve S2, and the input ends of the third valve S3 and the first valve S1 are communicated with the first valve S1. After entering the third valve S3 through the first valve S1, the compressed air enters the input end of the fifth valve S5 through the fourth valve S4, at this time, two output ends of the fifth valve S5 are conducted, the compressed air generated by the first compressor C1 enters the second dryer through the first check valve S6, and the compressed air is processed by the second dryer D2 and then enters the rear system.
When the second air source system CD2 works, if the first valve S1, the second valve S2 and the fourth valve S4 are de-energized, compressed air enters the second check valve S7 from the output end of the second compressor D2, then enters the input end of the second dryer D2, is processed by the second dryer D2, and then enters the main air reservoir R1 through the output end thereof.
When the second dryer D2 has a fault, after receiving a fault signal, the system controls the first dryer D2 to start operating, and controls the second valve S2 and the fourth valve S4 to be energized, the first valve S1 is de-energized, the second valve S2 and the fourth valve S4 are turned on, the first valve S1 is closed, and then the compressed air generated by the second compressor C2 enters the second valve S2, at this time, the input air pressure at the connection point of the third valve S3 and the second valve S2 is greater than the input air pressure at the connection point of the third valve S3 and the first valve S1, and then the input ends of the third valve S3 and the second valve S2 are communicated with the second valve S2. After entering the third valve S3 through the second valve S2, the compressed air enters the input end of the fifth valve S5 through the fourth valve S4, at this time, two output ends of the fifth valve S5 are conducted, the compressed air generated by the second compressor C2 enters the first dryer D1 through the second check valve S7, and the compressed air is processed by the first dryer D1 and then enters the rear system.
When a compressor strong pump mode is adopted, the two wind source systems are all put into use, and the wind source systems can be controlled to achieve the redundant use of the dryer in the same way.
According to the air source system provided by the embodiment of the invention, when any one dryer fails, the compressed air can be automatically switched to the input end of the other dryer by controlling the on-off of the first valve S1, the second valve S2 and the fourth valve S4, so that the compressed air enters the general style after being processed by the dryer and then enters the rear system, and the problems that equipment is easy to rust and the valves are stuck and the like after moisture and oil contamination impurities in the central air enter pneumatic devices such as the rear valves and the like in the prior art can be solved, and the system failure rate is increased and even the safe operation of a locomotive is influenced. The reliability of the air source system is greatly improved, and the damage of dryer faults to rear equipment is reduced. In addition, the invention only needs to install a valve on the original gas circuit, has stronger operability and practicability, simple principle and wide application range.
Claims (7)
1. A wind source system of a locomotive comprises a first wind source system and a second wind source system which are in parallel, wherein the first wind source system comprises a first compressor and a first drier connected behind the first compressor, and the second wind source system comprises a second compressor and a second drier connected behind the second compressor; it is characterized in that the preparation method is characterized in that,
the first valve, the second valve, the third valve, the fourth valve and the fifth valve are also included; the third valve comprises two input ends, and one input end with larger air pressure is conducted;
the fifth valve comprises an input end and two output ends, and the two output ends of the fifth valve are conducted only when gas enters the input end of the fifth valve;
the output end of the first compressor is connected with the input end of the first valve, and the output end of the second compressor is connected with the input end of the second valve; the output end of the first valve and the output end of the second valve are respectively connected to the two input ends of the third valve; the output end of the third valve is connected with the input end of the fourth valve; the output end of the fourth valve is connected with the input end of the fifth valve; and two output ends of the fifth valve are respectively connected with the input end of the first dryer and the input end of the second dryer.
2. The wind source system of claim 1, further comprising a first one-way valve and a second one-way valve, an input of the first one-way valve and an input of the first valve coupled to the output of the first compressor, an output of the first one-way valve and the fifth valve proximate the output of the first compressor and coupled between the inputs of the first dryer; an input of the second one-way valve and an input of the second valve are coupled in parallel to an output of the second compressor, and an output of the second one-way valve and the fifth valve are proximate to an output of the second compressor and are coupled in parallel to an input of the second dryer.
3. The wind source system of claim 1 or 2, wherein the third valve is a two-way pressure comparison valve.
4. The wind source system of claim 3, wherein the first valve, the second valve, and the fourth valve are electro-pneumatic valves.
5. The wind source system of claim 4, wherein the fifth valve is a cut-off valve.
6. A method of controlling a wind source system according to claim 5, comprising the steps of:
i, controlling the first valve, and de-energizing the second valve and the fourth valve;
II, detecting whether the first dryer and the second dryer have feedback fault signals, if so, entering a step III, and if not, continuously detecting whether the first dryer and the second dryer have the fault signals;
III, judging which dryer fails, if so, entering a step IV, and if so, entering a step V;
IV, sending a working instruction to a second dryer, controlling the first valve and the fourth valve to be electrified, and controlling the second valve to be deenergized;
and V, sending a working command to the first dryer, controlling the second valve and the fourth valve to be electrified, and controlling the first valve to be deenergized.
7. A locomotive comprising a wind source system according to any of claims 1 to 5, and a computer device programmed or configured for performing the steps of the method according to claim 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111090239.9A CN113734131B (en) | 2021-09-17 | 2021-09-17 | Locomotive, wind source system and control method thereof |
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| CN202111090239.9A CN113734131B (en) | 2021-09-17 | 2021-09-17 | Locomotive, wind source system and control method thereof |
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| CN113734131A true CN113734131A (en) | 2021-12-03 |
| CN113734131B CN113734131B (en) | 2022-11-08 |
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