Wind source device for rail vehicle and working state monitoring method thereof

Abstract

The present invention is a wind source device for rail vehicles and a working state monitoring method thereof, the wind source device for rail vehicles comprises an air intake device, a compressor and an air drying and purification device, the first air intake port of the air intake device is connected to an air source, the air outlet port of the air intake device is connected to a low-pressure air intake port of the compressor, the high-pressure air outlet port of the compressor is connected to the air intake port of the air drying and purification device, the air outlet port of the air drying and purification device is connected to a downstream general air duct, a circulation pipeline is externally connected between the air outlet port of the air drying and purification device and the downstream general air duct, the circulation pipeline is connected to a second air intake port of the air intake device, and a solenoid valve is arranged on the circulation pipeline. The present invention solves the technical problem that the prevention and control of lubricating oil emulsification by the wind source device for rail vehicles is labor-intensive and has poor effects.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transportation, and in particular to a wind source device for a rail vehicle and a method for monitoring its working state. Background Art

[0002] The air source device is a key device for supplying air to rail vehicles. The compressed air it produces can be used by rail vehicle braking control systems, pantograph control systems, air spring systems, etc. The performance and quality of the air source device directly affect the normal operation of various air-using equipment on the vehicle and driving safety.

[0003] At present, the problem of lubricating oil emulsification is a common problem in the use of air source devices. This problem generally occurs during the commissioning period of rail vehicles and the initial operation period when the vehicle consumes low air volume and the working environment is hot and humid. If this problem is not dealt with in a timely manner after it occurs, it may cause the failure of the formation of an oil film on the surface of the screw rotor of the rail vehicle, affecting the lubrication and sealing during the air compression process, causing problems such as wear of the surface profile of the screw rotor and reduced exhaust volume. In severe cases, it may even cause damage to the screw group bearings, burnout of the motor and other faults, endangering driving safety. In addition, in order to ensure that the amount of lubricating oil in the compressor is appropriate, neither too much oil nor insufficient oil, it is necessary to manually check the amount of lubricating oil during daily or weekly vehicle inspections.

[0004] like Figure 1 As shown, the existing wind source device utilizes the principle that it can increase the oil temperature in the circulating operation state but does not supply air to the downstream. Every day, only when the vehicle is activated and there is a zero-speed signal, the wind source device is started to enter the circulating operation for 30 minutes and then shut down; if there is no other vehicle activation and zero-speed signal on that day, the wind source device will no longer enter the circulating state on that day.

[0005] However, this method has the following disadvantages:

[0006] 1. In the current scheme, when the air source device is in a circulating operation state, the air that enters the intake valve body 100 and participates in the compression comes from the outside air or the air that flows back to the air inlet of the intake valve body 100 through the bypass line 200. The above air has not been dried, and the moisture contained therein has not been reduced. Therefore, during the circulating operation, the air absorbs the moisture in the lubricating oil at a slow speed, and a longer circulating operation time is required to achieve a better anti-emulsification effect.

[0007] 2. For lubricating oil that has already emulsified, in the current technical solution, since the air has not been dried, its absorption rate of the water in the lubricating oil is slow, and it is not suitable to eliminate the emulsification through the circulation operation mode. It is necessary to open the total air duct valve (or air cylinder valve) to exhaust the air to the outside, reduce the total air pressure to the starting pressure of the air source device, start the air source device, and run it continuously under the normal air supply mode to eliminate the emulsification problem. The above process is not only cumbersome to operate, but also has a large noise when exhausting the air to the outside under the normal air supply state, which generates noise pollution and affects the normal work of workshop workers.

[0008] Due to the existence of the above problems, the inspection of the lubricating oil quantity of the wind source device is generally still done by manual inspection. This work is not only labor-intensive, but also has the risk of untimely manual inspection and failure to find the problem of lack of lubricating oil in time. In addition, in order to eliminate the adverse effects caused by lubricating oil emulsification, reciprocating piston oil-free wind source devices have gradually begun to be used in the field of rail transit in recent years. Although the reciprocating piston oil-free wind source device fundamentally solves the occurrence of lubricating oil emulsification, if the wind source device is not working at a sufficient rate and liquid water precipitates, there are still major hidden dangers to the stable operation of the wind source device: when the reciprocating piston oil-free air compressor has a low working rate and liquid water precipitates, the powder generated by the friction between the self-lubricating piston ring and the piston cylinder wall cannot be discharged in time, and is bonded together and attached to the piston cylinder wall under the action of water. During the operation of the air compressor, these dust particles will scratch the cylinder wall or piston ring, destroying the friction and wear environment between the original self-lubricating piston ring and the cylinder wall, resulting in increased leakage and insufficient air supply, and reduced service life.

[0009] With regard to the problem in the related art that the wind source device for rail vehicles is labor-intensive and ineffective in preventing and controlling the emulsification of lubricating oil, no effective solution has been given so far.

[0010] Therefore, the inventor, relying on many years of experience and practice in related industries, proposes a wind source device for rail vehicles and a method for monitoring the working status thereof to overcome the defects of the prior art. Summary of the invention

[0011] The purpose of the present invention is to provide a wind source device for rail vehicles and a working status monitoring method thereof, which can circulate and compress air multiple times through a compressor, quickly increase the oil temperature in a circulating operation mode, and take away the moisture in the lubricating oil, thereby effectively preventing and eliminating the emulsification of the lubricating oil.

[0012] Another object of the present invention is to provide a wind source device for rail vehicles and a method for monitoring its working status, which can solve the problem of preventing and eliminating lubricating oil emulsification without generating noise pollution or reducing the ability of the wind source device to supply air to the vehicle, thereby ensuring the normal and stable operation of the air supply device and extending its service life.

[0013] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0014] The present invention provides a wind source device for a rail vehicle, the wind source device for a rail vehicle comprising an air intake device, a compressor and an air drying and purification device, wherein:

[0015] The first air inlet of the air intake device is connected to an air source, the air outlet of the air intake device is connected to the low-pressure air inlet of the compressor, the high-pressure air outlet of the compressor is connected to the air inlet of the air drying and purification device, the air outlet of the air drying and purification device is connected to a downstream main air duct, a circulation pipeline is externally connected between the air outlet of the air drying and purification device and the downstream main air duct, the circulation pipeline is connected to the second air inlet of the air intake device, and a solenoid valve is arranged on the circulation pipeline.

[0016] In a preferred embodiment of the present invention, when the solenoid valve is in a de-energized and disconnected state, outside air flows into the compressor through the first air inlet of the air intake device and the air outlet of the air intake device in sequence for compression, and the compressed air enters the air drying and purification device for drying and purification, a part of the compressed air containing impurities is discharged to the outside, and the other part of the clean compressed air flows into the downstream main air duct.

[0017] In a preferred embodiment of the present invention, when the solenoid valve is energized, outside air flows into the compressor through the first air inlet of the air intake device and the air outlet of the air intake device in sequence for compression, and the compressed air enters the air drying and purification device for drying and purification, a part of the compressed air containing impurities is discharged to the outside, and another part of the clean compressed air flows back through the circulation pipeline, and flows into the compressor through the second air inlet of the air intake device and the air outlet of the air intake device in sequence.

[0018] In a preferred embodiment of the present invention, when the solenoid valve is electrically conductive, the amount of external air entering the first air inlet of the air intake device per unit time is less than the amount of external air entering the first air inlet of the air intake device per unit time when the solenoid valve is electrically disconnected.

[0019] In a preferred embodiment of the present invention, the air intake device includes a muffler and an air intake valve, the air outlet of the muffler is connected to the air inlet of the air intake valve, the two air inlets arranged on the muffler are the first air inlet and the second air inlet of the air intake device, and the air outlet of the air intake valve is the air outlet of the air intake device.

[0020] In a preferred embodiment of the present invention, the wind source device for rail vehicles also includes an air filter for filtering solid impurities in the air, the air filter is arranged upstream of the air intake device, the air inlet of the air filter is connected to the air source, and the air outlet of the air filter is connected to the first air inlet of the air intake device.

[0021] In a preferred embodiment of the present invention, the wind source device for rail vehicles also includes a controller, and a moisture sensor for detecting the moisture content in the oil and gas barrel and a first liquid level sensor for detecting the oil level in the oil and gas barrel are provided in the oil and gas barrel of the compressor, and the detection signal output end of the moisture sensor and the detection signal output end of the first liquid level sensor are electrically connected to the detection signal receiving end of the controller respectively, and the control signal output end of the controller is electrically connected to the control end of the solenoid valve.

[0022] In a preferred embodiment of the present invention, a cooler is provided between the high-pressure air outlet of the compressor and the air inlet of the air drying and purification device, a second liquid level sensor for detecting the oil level in the cooler is provided inside the cooler, and a detection signal output end of the second liquid level sensor is electrically connected to a detection signal receiving end of the controller.

[0023] In a preferred embodiment of the present invention, a safety valve is provided between the high-pressure air outlet of the compressor and the air inlet of the cooler, and the control end of the safety valve is electrically connected to the control signal output end of the controller.

[0024] In a preferred embodiment of the present invention, the air outlet of the cooler is connected to the air inlet of the air drying and purification device via a hose.

[0025] In a preferred embodiment of the present invention, the air drying and purification device includes a pre-filter, a double-tower dryer and a post-filter, and the pre-filter, the double-tower dryer and the post-filter are sequentially connected along the flow direction of the air.

[0026] In a preferred embodiment of the present invention, a first overflow valve is provided on the downstream main air duct, and the first overflow valve is located downstream of the connection position between the downstream main air duct and the circulation duct;

[0027] The opening pressure of the first relief valve meets the following conditions:

[0028] P 测 ≤P 溢1 <P 启2 ;

[0029] Among them, the P 测The minimum pressure required to monitor the working status of the double towers in the double tower dryer; the P 溢1 is the opening pressure of the first relief valve; 启2 It is the total wind pressure when two wind source devices in a rail vehicle are started simultaneously.

[0030] In a preferred embodiment of the present invention, a second overflow valve or a throttle valve is provided on the circulation pipeline, and the conditions required to open the second overflow valve are the same as the conditions required to open the throttle valve;

[0031] The opening pressure of the second relief valve meets the following conditions:

[0032] P AD ≤P 溢2 <P 止 ;

[0033] Among them, the P AD The pressure required for the double tower dryer to work normally; 溢2 is the opening pressure of the second relief valve; 止 It is the total wind pressure when the wind source device stops supplying air.

[0034] The present invention provides a method for monitoring the working state of a wind source device for a rail vehicle, which is applicable to the above-mentioned wind source device for a rail vehicle. The method for monitoring the working state of a wind source device for a rail vehicle comprises the following steps:

[0035] Step S1: real-time monitoring of the total air pressure in the total air duct of the rail vehicle;

[0036] Step S2: comparing the total wind pressure with a first total wind pressure when two wind source devices for rail vehicles in a rail vehicle are started simultaneously and a second total wind pressure when any one wind source device for rail vehicles in a rail vehicle is started alone;

[0037] Step S3: if the total wind pressure is less than the first total wind pressure, the two rail vehicle wind source devices are simultaneously started to enter a normal wind supply mode until the total wind pressure is equal to the total wind pressure when the rail vehicle wind source devices stop supplying air;

[0038] If the total wind pressure is greater than or equal to the first total wind pressure and less than the second total wind pressure, one of the wind source devices for rail vehicles starts to enter the normal air supply mode until the total wind pressure is equal to the total wind pressure when the wind source device for rail vehicles stops supplying air;

[0039] If the total wind pressure is greater than or equal to the second total wind pressure, one of the rail vehicle wind source devices starts to enter a circulating operation mode until the total wind pressure is equal to the total wind pressure when the rail vehicle wind source device stops supplying air.

[0040] In a preferred embodiment of the present invention, in step S3, if the total wind pressure is less than the first total wind pressure, the two rail vehicle wind source devices are simultaneously started to enter the normal air supply mode until the total wind pressure is equal to the total wind pressure when the rail vehicle wind source device stops supplying air, and the operation time of the rail vehicle wind source device is recorded as the first time;

[0041] The first time is compared with the third time. If the first time is greater than or equal to the third time, both of the two rail vehicle wind source devices are shut down; if the first time is less than the third time, one of the rail vehicle wind source devices is shut down, and the other rail vehicle wind source device enters a circulation operation mode and runs for a fourth time before shutting down.

[0042] Among them, the first time is determined by the actual recording time; the third time is a self-set time; and the fourth time is determined by subtracting the first time from the third time.

[0043] In a preferred embodiment of the present invention, in step S3, if the total wind pressure is greater than or equal to the first total wind pressure and less than the second total wind pressure, one of the wind source devices for rail vehicles starts to enter the normal air supply mode until the total wind pressure is equal to the total wind pressure when the wind source device for rail vehicles stops supplying air, and the operation time of the wind source device for rail vehicles is recorded as the second time;

[0044] The second time is compared with the third time. If the second time is greater than or equal to the third time, the wind source device for the rail vehicle is shut down; if the second time is less than the third time, the wind source device for the rail vehicle enters a circulation operation mode and runs for a fifth time before shutting down.

[0045] Among them, the second time is determined by the actual recording time; the third time is a self-set time; and the fifth time is determined by subtracting the second time from the third time.

[0046] In a preferred embodiment of the present invention, in step S3, if the total wind pressure is greater than or equal to the second total wind pressure, one of the wind source devices for rail vehicles starts to enter a cyclic operation mode until the total wind pressure is equal to the total wind pressure when the wind source device for rail vehicles stops supplying air, and the operation time of the wind source device for rail vehicles is recorded as the third time and then stopped;

[0047] Wherein, the third time is a self-set time.

[0048] In a preferred embodiment of the present invention, in step S3, if the wind source device for the rail vehicle is in the circulation operation mode and needs to supply air to the rail vehicle, the wind source device for the rail vehicle switches to the normal air supply mode until the total wind pressure is equal to the total wind pressure when the wind source device for the rail vehicle stops supplying air.

[0049] In a preferred embodiment of the present invention, the operation time of the rail vehicle wind source device switching to the normal air supply mode is recorded as the sixth time;

[0050] The sixth time is compared with the third time. If the sixth time is less than the third time, the wind source device for the rail vehicle is switched to the circulation operation mode again until the continuous operation time of the wind source device for the rail vehicle reaches the third time and then the device is stopped.

[0051] Wherein, the sixth time is determined by the actual recording time.

[0052] In a preferred embodiment of the present invention, if the continuous operation time of the wind source device for a rail vehicle reaches a third time and the wind source device for a rail vehicle is in a circulation operation mode, the wind source device for a rail vehicle is directly shut down; if the continuous operation time of the wind source device for a rail vehicle reaches a third time and the wind source device for a rail vehicle is in a normal air supply mode, the wind source device for a rail vehicle supplies air until the total wind pressure is equal to the total wind pressure when the wind source device for a rail vehicle stops supplying air and then shuts down.

[0053] In a preferred embodiment of the present invention, after step S3, it also includes collecting water content data in the lubricating oil in the oil and gas barrel of the compressor through a moisture sensor; if the moisture content is less than a preset moisture content threshold, the rail vehicle wind source device remains in a shutdown state; if the moisture content is greater than or equal to the preset moisture content threshold, the rail vehicle wind source device is controlled to enter a circulation operation mode, or the liquid water in the oil and gas barrel of the compressor is first discharged and then the rail vehicle wind source device is controlled to enter a circulation operation mode.

[0054] In a preferred embodiment of the present invention, the oil level data in the compressor is collected by a first liquid level sensor, and the oil level data in the cooler is collected by a second liquid level sensor to obtain the total amount of lubricating oil in the wind source device for the rail vehicle; if the total amount of lubricating oil in the wind source device for the rail vehicle is less than a preset lubricating oil content threshold, the lubricating oil is added to the wind source device for the rail vehicle.

[0055] As described above, the characteristics and advantages of the wind source device for rail vehicles and the working status monitoring method thereof of the present invention are:

[0056] 1. By controlling the on-off state of the solenoid valve on the circulation pipeline, it can be ensured that when the air source device is in the normal air supply state, the outside air is compressed and smoothly transported to the downstream main air pipeline for supplying air to the rail vehicles. When the air source device is shut down and unloaded, the compressed air can be returned to the compressor through the circulation pipeline for compression. During this circulation process, the oil temperature in the compressor can be quickly increased, and the moisture in the lubricating oil can be taken away, effectively achieving the effect of preventing and eliminating the emulsification of the lubricating oil.

[0057] 2. The compressed air will be purified by the air drying and purification device to filter out solid particles, oil and water in the compressed air, so as to achieve the purpose of purifying and drying the compressed air. The compressed air treated by the air drying and purification device can be returned to the compressor for re-compression, and then it can quickly take away the water in the lubricating oil, further prevent the emulsification of the lubricating oil, and improve the stability and service life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0059] in:

[0060] Figure 1 : It is a structural schematic diagram of the existing wind source device in the circulating operation state.

[0061] Figure 2 : It is a structural schematic diagram of the wind source device for rail vehicles of the present invention.

[0062] Figure 3 : is one of the structural schematic diagrams of the wind source device for rail vehicles in the present invention in a normal air supply state.

[0063] Figure 4 : is one of the structural schematic diagrams of the wind source device for rail vehicles in the present invention in a circulating operation state.

[0064] Figure 5 : This is the second structural schematic diagram of the wind source device for rail vehicles in the normal air supply state of the present invention.

[0065] Figure 6 : This is the second structural schematic diagram of the wind source device for rail vehicles in the circulating operation state of the present invention.

[0066] The accompanying drawings in the background art are:

[0067] 100. Intake valve body; 200. Bypass line.

[0068] The accompanying drawings in the present invention are:

[0069] 1. Air filter; 2. Air intake device;

[0070] 201. Muffler; 202. Intake valve;

[0071] 3. Compressor; 4. Safety valve;

[0072] 5. Cooler; 6. Hose;

[0073] 7. Air drying and purification device; 701. Pre-filter;

[0074] 702. Double tower dryer; 703. Post filter;

[0075] 8. The first relief valve; 9. The second relief valve;

[0076] 10. Solenoid valve; 11. Moisture sensor;

[0077] 12. A first liquid level sensor; 13. A second liquid level sensor;

[0078] 14. Controller; 15. Throttle valve;

[0079] 16. Circulation pipeline; 17. Downstream main air pipeline. DETAILED DESCRIPTION

[0080] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0081] Implementation Method 1

[0082] like Figures 2 to 4 As shown, the present invention provides a wind source device for a rail vehicle, which includes an air intake device 2, a compressor 3 and an air drying and purification device 7, wherein: the air intake device 2 is provided with a first air inlet A, a second air inlet B and an air outlet C, the first air inlet A of the air intake device 2 is connected to the air source (that is, the outside air enters through the first air inlet A of the air intake device 2), the air outlet C of the air intake device 2 is connected to the low-pressure air inlet of the compressor 3, the high-pressure air outlet of the compressor 3 is connected to the air inlet of the air drying and purification device 7, the air outlet of the air drying and purification device 7 is connected to the downstream main air pipeline 17, a circulation pipeline 16 is externally connected between the air outlet of the air drying and purification device 7 and the downstream main air pipeline 17, the circulation pipeline 16 is connected to the second air inlet B of the air intake device 2, and a solenoid valve 10 is provided on the circulation pipeline 16.

[0083] During operation, the present invention can achieve the purpose of controlling the on-off state of the circulation pipeline 16 by controlling the on-off state of the electromagnetic valve 10, which can ensure that when the wind source device is in a normal air supply state, the outside air is compressed and smoothly transported to the downstream main air pipeline 17 for supplying air to the rail vehicle, and when the wind source device is shut down and unloaded, the compressed air can be returned to the compressor 3 through the circulation pipeline 16 for circulation compression. During this circulation process, the oil temperature in the compressor 3 can be quickly increased, and the water in the lubricating oil can be taken away by compressed air, effectively achieving the effect of preventing and eliminating the emulsification of the lubricating oil. The compressed air will be purified by the air drying and purification device 7 to filter out solid particles, oil and water in the compressed air, so as to achieve the purpose of purifying and drying the compressed air. The compressed air treated by the air drying and purification device 7 can be returned to the compressor 3 for re-compression, and then the water in the lubricating oil can be quickly taken away, further preventing the emulsification of the lubricating oil, and improving the stability and service life of the compressor.

[0084] In an optional embodiment of the present invention, Figures 2 to 4 As shown, the air intake device 2 includes a muffler 201 and an air intake valve 202. The muffler 201 is located upstream of the air intake valve 202. The air outlet of the muffler 201 is connected to the air intake of the air intake valve 202. The two air intakes provided on the muffler 201 are the first air intake A and the second air intake B of the air intake device 2, and the air outlet of the air intake valve 202 is the air outlet C of the air intake device 2. When the compressed air circulates in the air source device, the muffler 201 can silence and reduce the noise of the compressed air discharge process in the air intake device 2, and the gas discharged from the muffler 201 can quickly enter the air intake valve 202. Among them, the diameter of the muffler 201 meets the full displacement requirement of the air source device (that is, the air volume passing through the muffler 201 can meet the air supply volume requirement of the air source device).

[0085] In an optional embodiment of the present invention, Figures 2 to 4 As shown, the wind source device for rail vehicles also includes an air filter 1, which is arranged upstream of the air intake device 2, the air inlet of the air filter 1 is connected to the air source, and the air outlet of the air filter 1 is connected to the first air inlet A of the air intake device 2. The air filter 1 filters out dust or other solid impurities in the air, ensuring that the air entering the wind source device has a high degree of cleanliness, thereby extending the service life of the equipment.

[0086] In an optional embodiment of the present invention, Figures 2 to 4As shown, the wind source device for rail vehicles also includes a controller 14. A moisture sensor 11 and a first liquid level sensor 12 are provided in the oil and gas barrel of the compressor 3. The moisture sensor 11 is used to monitor the moisture content in the lubricating oil in the oil and gas barrel in real time. The first liquid level sensor 12 is used to monitor the oil level in the oil and gas barrel in real time. The detection signal output end of the moisture sensor 11 and the detection signal output end of the first liquid level sensor 12 are respectively electrically connected to the detection signal receiving end of the controller 14, and the control signal output end of the controller 14 is electrically connected to the control end of the solenoid valve 10. The controller 14 can receive and store the data collected by the moisture sensor 11 and the first liquid level sensor 12, and control the on-off state of the solenoid valve 10, so that the staff can adjust and control the wind source device.

[0087] Furthermore, the solenoid valve 10 may be, but is not limited to, a two-position two-way solenoid valve; of course, the solenoid valve 10 may also be replaced by a combination of a solenoid valve body and an air-controlled valve.

[0088] Further, such as Figures 2 to 4 As shown, a cooler 5 is provided between the high-pressure air outlet of the compressor 3 and the air inlet of the air drying and purification device 7, and an oil cooling chamber and a water cooling chamber are provided inside the cooler 5. A second liquid level sensor 13 is provided in the oil cooling chamber, and a detection signal output end of the second liquid level sensor 13 is electrically connected to a detection signal receiving end of the controller 14. When the compressed air passes through the cooler 5, the oil droplets and water droplets carried in the compressed air can be condensed and separated in the oil cooling chamber and the water cooling chamber respectively, and the oil level of the lubricating oil in the oil cooling chamber can be monitored in real time through the second liquid level sensor 13.

[0089] Further, such as Figures 2 to 4 As shown, a safety valve 4 is provided between the high-pressure air outlet of the compressor 3 and the air inlet of the cooler 5, and the control end of the safety valve 4 is electrically connected to the control signal output end of the controller 14. When the pressure in the oil and gas tank of the compressor 3 is too high (i.e., greater than the preset pressure threshold), the safety valve 4 is controlled by the controller 14 to operate and exhaust to the outside, thereby protecting the equipment.

[0090] Further, such as Figures 2 to 4 As shown, the air outlet of the cooler 5 is connected to the air inlet of the air drying and purification device 7 via a hose 6, which can reduce the impact of the vibration of the compressor 3 on the air drying and purification device 7 during operation and improve the stability of the equipment.

[0091] In an optional embodiment of the present invention, Figures 2 to 4As shown, the air drying and purification device 7 includes a pre-filter 701, a double-tower dryer 702 and a post-filter 703, which are sequentially connected along the air flow direction. Liquid water, liquid oil, part of suspended oil and solid particles in the compressed air are filtered out by the pre-filter 701, most of the gaseous water in the compressed air are filtered out by the double-tower dryer 702, and most of the suspended oil, part of the gaseous oil and most of the solid particles generated during the drying process are filtered out by the post-filter 703, thereby greatly reducing the relative humidity of the compressed air treated by the air drying and purification device 7.

[0092] In an optional embodiment of the present invention, Figures 2 to 4 As shown, a first overflow valve 8 is provided on the downstream main air duct 17, and the first overflow valve 8 is located downstream of the connection position between the downstream main air duct 17 and the circulation duct 16. The first overflow valve 8 can prevent the compressed air in the vehicle main air duct from flowing back; in addition, by controlling the first overflow valve 8, the pressure required for the double tower working state in the double tower dryer 702 can be established preferentially during the initial air charging process of the rail vehicle. Among them, the diameter of the first overflow valve 8 meets the full displacement requirement of the air source device (that is, the air volume passing through the first overflow valve 8 can meet the air supply volume requirement of the air source device).

[0093] Furthermore, the opening pressure of the first relief valve 8 satisfies the following conditions:

[0094] P 测 ≤P 溢1 <P 启2 ;

[0095] Among them, P 测 The minimum pressure required to monitor the working status of the twin towers in the twin tower dryer 702; P 溢1 is the opening pressure of the first relief valve 8; P 启2 It is the total wind pressure when two wind source devices in a rail vehicle are started simultaneously.

[0096] In an optional embodiment of the present invention, Figures 2 to 4 As shown, a second overflow valve 9 is provided on the circulation pipeline 16. During the air circulation compression process, the pressure required to monitor the double tower dryer 702 to be in a normal working state for a long time can be established in the air source device by controlling the second overflow valve 9. Among them, the diameter of the second overflow valve 9 meets the full displacement requirement of the air source device (that is, the air volume passing through the second overflow valve 9 can meet the air supply volume requirement of the air source device).

[0097] Furthermore, the opening pressure of the second relief valve 9 satisfies the following conditions:

[0098] P AD ≤P溢2 <P 止 ;

[0099] Among them, P AD The pressure required for the double tower dryer 702 to work normally; P 溢2 is the opening pressure of the second relief valve 9; P 止 It is the total wind pressure when the wind source device stops supplying air.

[0100] In another optional embodiment of the present invention, Figure 5 , Figure 6 As shown, the throttle valve 15 can be used to replace the second overflow valve 9 (that is, the second overflow valve 9 is not provided on the circulation pipeline 16, but the throttle valve 15 is provided), and the aperture of the throttle hole in the throttle valve 15 can be adjusted or replaced to adapt to air source devices with different displacements. Among them: the conditions required to open the second overflow valve 9 are the same as the conditions required to open the throttle valve 15 (that is, for an air source device with a known displacement, the aperture of the throttle hole should meet: it can establish a pressure required to monitor the long-term normal operation of the double-tower dryer 702 during the circulation compression of air, and it can also meet the exhaust volume of the throttle hole under the total wind pressure when the air source device stops supplying air is greater than the full displacement of the air source device).

[0101] The wind source device for rail vehicles of the present invention can be in two working modes: normal air supply and circulation operation, which are specifically:

[0102] Normal air supply mode: Figure 3 , Figure 5 As shown, the air source device is in a normal air supply state, at this time, the control solenoid valve 10 is in a power-off disconnected state, and the outside air passes through the air filter 1, and then passes through the first air inlet A of the air intake device 2 and the air outlet C of the air intake device 2 in sequence to flow into the compressor 3 for compression, and the compressed air passes through the cooler 5, the hose 6, the air drying and purification device 7 and the first overflow valve 8 in sequence and then flows into the downstream main air duct 17. Of course, the compressed air flowing into the downstream main air duct 17 is only a part of the compressed air discharged from the compressor 3 (this part is clean compressed air), and the other part of the compressed air (this part is compressed air containing impurities) is discharged to the outside after passing through the air drying and purification device 7.

[0103] Cycle operation mode: Figure 4 , Figure 6As shown, the wind source device is in a post-shutdown unloading state, at which time the control solenoid valve 10 is in an energized conduction state, and the outside air passes through the air filter 1, and then sequentially passes through the first air inlet A of the air intake device 2 and the air outlet C of the air intake device 2 to flow into the compressor 3 for compression, and the compressed air passes through the cooler 5, the hose 6, the air drying and purification device 7, the solenoid valve 10 and the second overflow valve 9 (or the throttle valve 15) in sequence, and then enters the air intake device 2 again through the second air inlet B of the air intake device 2, and the compressed air flows into the compressor 3 again through the air outlet C of the air intake device 2 for compression. Of course, the compressed air that flows back to the circulation pipeline 16 is only a part of the compressed air discharged by the compressor 3 (this part is clean compressed air), and the other part of the compressed air (this part is compressed air containing impurities) is discharged to the outside after passing through the air drying and purification device 7.

[0104] When the wind source device operates in the circulation operation mode, the outside air will still enter the wind source device through the air filter 1 and the first air inlet A of the air intake device 2 to supplement the compressed air discharged from the air drying and purification device 7. However, it is necessary to satisfy that the amount of outside air entering the first air inlet A of the air intake device 2 per unit time when the solenoid valve 10 is powered on (i.e., in the circulation operation mode) is less than the amount of outside air entering the first air inlet A of the air intake device 2 per unit time when the solenoid valve 10 is powered off (i.e., in the normal air supply mode).

[0105] The characteristics and advantages of the wind source device for rail vehicles of the present invention are:

[0106] 1. The wind source device for rail vehicles can achieve the purpose of controlling the on-off state of the circulation pipeline 16 by controlling the on-off state of the electromagnetic valve 10, which can ensure that when the wind source device is in a normal air supply state, the outside air is compressed and smoothly transported to the downstream main air pipeline 17 for supplying air to the rail vehicle, and when the wind source device is in a shutdown and unloading state, the compressed air can be returned to the compressor 3 through the circulation pipeline 16 for circulation compression. During this circulation process, the oil temperature in the compressor 3 can be quickly increased, and the moisture in the lubricating oil can be taken away by compressed air, thereby effectively preventing and eliminating the emulsification of the lubricating oil.

[0107] 2. The rail vehicle wind source device purifies the compressed air through the air drying and purification device 7 to filter out solid particles, oil and water in the compressed air, so as to achieve the purpose of purifying and drying the compressed air. The compressed air treated by the air drying and purification device 7 can be returned to the compressor 3 for re-compression, and can quickly take away the water in the lubricating oil, further prevent the emulsification of the lubricating oil, and improve the stability and service life of the compressor.

[0108] Implementation Method 2

[0109] The present invention provides a method for monitoring the working state of a wind source device for a rail vehicle, which is applicable to the above-mentioned wind source device for a rail vehicle. The method for monitoring the working state of a wind source device for a rail vehicle comprises the following steps:

[0110] Step S1: After the wind source device of the rail vehicle is powered on for the first time every day and the rail vehicle has a zero speed signal, the total wind pressure P in the total wind duct of the rail vehicle is measured. 总 Conduct real-time monitoring;

[0111] Step S2: The total wind pressure P 总 The first total wind pressure P when two rail vehicle wind source devices (i.e., the main wind source device and the auxiliary wind source device) in the rail vehicle are started simultaneously 启2 and comparing the second total wind pressure when any one of the rail vehicles is started up with a wind source device (a main wind source device or an auxiliary wind source device);

[0112] Step S3:

[0113] Working condition 1: If the total wind pressure P 总 Less than the first total wind pressure P 启2 (ie: P 总 <P 启2 ), the two rail vehicle air source devices (i.e., the main air source device and the auxiliary air source device) are started simultaneously to enter the normal air supply mode, supplying air to the total air pressure P 总 Equal to the total wind pressure P when the wind source device for rail vehicles stops supplying air 止 , the auxiliary air source device is shut down, and the operation time of the main air source device is recorded as the first time t1;

[0114] Compare the first time t1 with the third time t0. If the first time t1 is greater than or equal to the third time t0 (i.e., t1≥t0), both the main wind source device and the auxiliary wind source device are controlled to shut down. If the first time t1 is less than the third time t0 (i.e., t1<t0), one wind source device for a rail vehicle (auxiliary wind source device) is shut down, and the other wind source device for a rail vehicle (main wind source device) enters a circulation operation mode and runs for a fourth time t4 before shutting down.

[0115] Among them, the first time t1 is determined by the actual recording time; the third time t0 is a self-set time, generally 10 minutes to 40 minutes, and can also be set according to the working rate of the wind source device for the rail vehicle in different stages (such as: debugging period, initial operation and formal operation period, etc.) and the emulsification risk of the lubricating oil (when the working rate of the wind source device for the rail vehicle is low and the emulsification risk of the lubricating oil is high, a longer time period is taken); the fourth time t4 is determined by subtracting the first time t1 from the third time t0 (that is, t4=t0-t1).

[0116] Working condition 2: If the total wind pressure P 总 Greater than or equal to the first total wind pressure P 启2 And less than the second total wind pressure P 启1 (ie: P 启2 ≤P 总 <P 启1 ), then a rail vehicle air source device (main air source device) starts to enter the normal air supply mode until the total air pressure P 总 Equal to the total wind pressure P when the wind source device for rail vehicles stops supplying air 止 , and record the operation time of the main wind source device as the second time t2;

[0117] The second time t2 is compared with the third time t0. If the second time t2 is greater than or equal to the third time t0 (i.e., t2≥t0), both the main wind source device and the auxiliary wind source device are controlled to shut down; if the second time t2 is less than the third time t0 (i.e., t1<t0), the wind source device for the rail vehicle (the main wind source device) enters the circulation operation mode and then shuts down after running for the fifth time t5;

[0118] Among them, the second time t2 is determined by the actual recording time; the third time t0 is a self-set time, generally 10 minutes to 40 minutes, and can also be set according to the operating rate of the wind source device for the rail vehicle in different stages (such as: debugging period, initial operation and formal operation period, etc.) and the emulsification risk of the lubricating oil (when the operating rate of the wind source device for the rail vehicle is low and the emulsification risk of the lubricating oil is high, a longer time period is taken); the fifth time t5 is determined by subtracting the second time t2 from the third time t0 (that is, t5=t0-t2).

[0119] Working condition 3: If the total wind pressure P 总 Greater than or equal to the second total wind pressure P 启1 (ie: P 总 >P 启1 ), only one rail vehicle wind source device (main wind source device) starts to enter the circulation operation mode until the total wind pressure P 总 Equal to the total wind pressure P when the wind source device for rail vehicles stops supplying air 止 , and record that the main wind source device stops running after the third time t0;

[0120] Among them, the third time t0 is a self-set time, which is generally 10 minutes to 40 minutes. It can also be set according to the operating rate of the wind source device for the rail vehicle and the emulsification risk of the lubricating oil when the rail vehicle is in different stages (such as: debugging period, initial operation and formal operation period, etc.) (when the operating rate of the wind source device for the rail vehicle is low and the emulsification risk of the lubricating oil is high, a longer time period is taken).

[0121] In working condition 3, if the wind source device for rail vehicles is in the circulation operation mode and there is a need to supply air to the rail vehicles, the wind source device for rail vehicles (main wind source device) will immediately switch to the normal air supply mode until the total wind pressure P 总 Equal to the total wind pressure P when the wind source device for rail vehicles stops supplying air 止 . In this project, the running time of the wind source device for rail vehicles switching to the normal air supply mode is recorded as the sixth time t6; the sixth time t6 is compared with the third time t0. If the sixth time t6 is less than the third time t0 (i.e.: t6<t0, the continuous running time of the wind source device for rail vehicles has not reached the third time t0), the wind source device for rail vehicles switches to the circulation operation mode again until the continuous running time of the wind source device for rail vehicles reaches the third time t0 and then stops; wherein, the sixth time t6 is determined by the actual recorded time. There are the following two situations when stopping:

[0122] 1. If the continuous operation time of the wind source device for a rail vehicle reaches the third time t0, the wind source device for a rail vehicle is in a circulation operation mode, and the wind source device for a rail vehicle is directly shut down;

[0123] 2. If the continuous operation time of the wind source device for rail vehicles reaches the third time t0, the wind source device for rail vehicles is in the normal air supply mode, and the wind source device for rail vehicles supplies air to the total air pressure P 总 Equal to the total wind pressure P when the wind source device for rail vehicles stops supplying air 止 Then shut down.

[0124] In an optional embodiment of the present invention, before step S1, it also includes confirming the working status of two air source devices (one is the main air source device, and the other is the auxiliary air source device) in the rail vehicle on that day; if the main air source device is in a normal working state, only the main air source device is allowed to enter the circulating operation mode on that day; if the main air source device fails, the auxiliary air source device is promoted to the main air source device, and the auxiliary air source device is allowed to enter the circulating operation mode on that day.

[0125] In an optional embodiment of the present invention, after step S3, it further includes collecting the water content data of the lubricating oil in the oil and gas barrel of the compressor 3 through the water sensor 11, and executing according to the following logic:

[0126] If the data collected by the moisture sensor 11 shows that the moisture content is low (i.e., the moisture content is less than the preset moisture content threshold value) and there is no risk of emulsification, the rail vehicle air source device remains in a shutdown state, and there is no need to control the rail vehicle air source device to enter a circulation operation mode;

[0127] If the data collected by the moisture sensor 11 shows that the water content is relatively high (i.e., the water content is slightly greater than or equal to the preset moisture content threshold), there is a risk of emulsification or slight emulsification has occurred, the air source device is controlled to enter the circulation operation mode for a certain period of time until the data collected by the moisture sensor 11 shows that the water content returns to normal. When running in the circulation operation mode, if there is a need to supply air to the vehicle, the air source device is controlled to immediately switch to the normal air supply mode to give priority to ensuring the air supply demand for the vehicle;

[0128] If the data collected by the moisture sensor 11 shows that the water content is very high (i.e., the moisture content is much greater than the preset moisture content threshold) and serious emulsification has occurred, it is necessary to first discharge the liquid water in the oil and gas tank of the compressor 3, and then control the rail vehicle wind source device to enter the circulation operation mode to eliminate the emulsification problem.

[0129] In an optional embodiment of the present invention, after the rail vehicle powers on the wind source device, when the wind source device is in a shutdown state, the oil level data in the compressor 3 is collected through the first liquid level sensor 12, and the oil level data in the cooler 5 is collected through the second liquid level sensor 13 to obtain the total amount of lubricating oil in the wind source device for the rail vehicle (i.e., the sum of the oil amount in the compressor 3 and the oil amount in the cooler 5); if the total amount of lubricating oil in the wind source device for the rail vehicle is less than a preset lubricating oil content threshold, it means that the unit is short of oil and the lubricating oil needs to be added to the wind source device for the rail vehicle.

[0130] If the working state monitoring method of the wind source device for rail vehicles of the present invention is applied to a reciprocating piston oil-free wind source device, the arrangement of the moisture sensor 11, the first liquid level sensor 12 and the second liquid level sensor 13 can be eliminated. The present invention utilizes the characteristic that most of the compressed air entering the compressor 3 of the wind source device in the circulating operation mode is air that has been dried and purified. On the one hand, the dried and purified air participates in the compression process, has a strong water absorption capacity, can promptly remove the residual moisture in the piston cylinder, improves the friction and wear environment between the self-lubricating piston ring and the piston cylinder wall, and enhances stability; on the other hand, the dried and purified compressed air participates in the drying of the twin-tower dryer 702 and the compressed air regeneration process, which has a small burden on the twin-tower dryer 702, generates less friction dust, and can promptly discharge the existing friction dust, thereby improving the working state of the twin-tower dryer 702 and extending its service life.

[0131] The characteristics and advantages of the working state monitoring method of the wind source device for rail vehicles of the present invention are:

[0132] 1. The working state monitoring method of the wind source device for rail vehicles can be automatically controlled to prevent and control the emulsification problem of the lubricating oil in the compressor 3 without manual operation.

[0133] 2. The working status monitoring method of the wind source device for rail vehicles can automatically monitor the amount of lubricating oil in the wind source device and the water content in the lubricating oil, effectively preventing and controlling the occurrence of lubricating oil emulsification problems, without the need for manual operation, and greatly improving the degree of automation.

[0134] 3. The working status monitoring method of the air source device for rail vehicles will not directly exhaust a large amount of air to the outside during the process of preventing and controlling emulsification of the lubricating oil (that is, the air source device is in a circulating operation mode), and the noise is small, and no noise pollution is caused to the external environment, thereby not affecting the normal work of the staff in the workshop.

[0135] Fourth, the working status monitoring method of the wind source device for rail vehicles can ensure the maximum air intake in the compressor 3 during the process of preventing and controlling the emulsification of the lubricating oil (that is, the wind source device is in the circulation operation mode). The compressed air volume per unit time is large and the heat release is large, which can quickly increase the oil temperature and prevent and control the emulsification of the lubricating oil.

[0136] 5. The working status monitoring method of the wind source device for rail vehicles, in the process of preventing and controlling emulsification of the lubricating oil (i.e.: the wind source device is in the circulation operation mode), most of the air involved in the circulation compression is dried and purified by the air drying and purification device 7, and the air humidity is low, which can quickly take away the moisture precipitated in the lubricating oil, thereby effectively preventing and eliminating the problem of emulsification of the lubricating oil.

[0137] 6. The working status monitoring method of the wind source device for rail vehicles can be implemented in a normal air supply mode, will not reduce the ability of the wind source device to supply air to the rail vehicle, and will not cause the risk of insufficient air supply capacity.

[0138] 7. The working state monitoring method of the air source device for rail vehicles can effectively improve the friction and wear environment between the self-lubricating piston ring and the piston cylinder wall of the reciprocating piston oil-free air source device, ensure stable exhaust volume, and increase service life.

[0139] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A method for monitoring the working status of a wind source device for a rail vehicle, characterized in that: The air source device for rail vehicles comprises an air intake device, a compressor and an air drying and purification device, wherein: The first air inlet of the air intake device is connected to an air source, the air outlet of the air intake device is connected to the low-pressure air inlet of the compressor, the high-pressure air outlet of the compressor is connected to the air inlet of the air drying and purification device, the air outlet of the air drying and purification device is connected to a downstream total air pipeline, a circulation pipeline is externally connected between the air outlet of the air drying and purification device and the downstream total air pipeline, the circulation pipeline is connected to the second air inlet of the air intake device, and a solenoid valve is provided on the circulation pipeline; The monitoring method comprises the following steps: Step S1: real-time monitoring of the total air pressure in the total air duct of the rail vehicle; Step S2: comparing the total wind pressure with a first total wind pressure when two wind source devices for rail vehicles in a rail vehicle are started simultaneously and a second total wind pressure when any one wind source device for rail vehicles in a rail vehicle is started alone; Step S3: if the total wind pressure is less than the first total wind pressure, the two rail vehicle wind source devices are simultaneously started to enter the normal air supply mode until the total wind pressure is equal to the total wind pressure when the rail vehicle wind source device stops supplying air, and the operation time of the rail vehicle wind source device is recorded as the first time; The first time is compared with the third time. If the first time is greater than or equal to the third time, both of the two rail vehicle wind source devices are shut down; if the first time is less than the third time, one of the rail vehicle wind source devices is shut down, and the other rail vehicle wind source device enters a circulation operation mode and runs for a fourth time before shutting down. Wherein, the first time is determined by the actual recording time; the third time is a self-set time; the fourth time is determined by subtracting the first time from the third time; If the total wind pressure is greater than or equal to the first total wind pressure and less than the second total wind pressure, one of the wind source devices for rail vehicles starts to enter the normal air supply mode until the total wind pressure is equal to the total wind pressure when the wind source device for rail vehicles stops supplying air, and the operation time of the wind source device for rail vehicles is recorded as the second time; The second time is compared with the third time. If the second time is greater than or equal to the third time, the wind source device for the rail vehicle is shut down; if the second time is less than the third time, the wind source device for the rail vehicle enters a circulation operation mode and runs for a fifth time before shutting down. Wherein, the second time is determined by the actual recording time; the third time is a self-set time; the fifth time is determined by subtracting the second time from the third time; If the total wind pressure is greater than or equal to the second total wind pressure, one of the wind source devices for rail vehicles starts to enter a circulation operation mode until the total wind pressure is equal to the total wind pressure when the wind source device for rail vehicles stops supplying air, and the operation time of the wind source device for rail vehicles is recorded as the third time and then stopped; Wherein, the third time is a self-set time.

2. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 1, characterized in that: When the solenoid valve is in the disconnected state due to power failure, the outside air flows into the compressor through the first air inlet of the air intake device and the air outlet of the air intake device in sequence for compression, and the compressed air enters the air drying and purification device for drying and purification, a part of the compressed air containing impurities is discharged to the outside, and the other part of the clean compressed air flows into the downstream main air duct.

3. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 2, characterized in that: When the solenoid valve is energized and turned on, outside air flows into the compressor through the first air inlet of the air intake device and the air outlet of the air intake device in sequence for compression, and the compressed air enters the air drying and purification device for drying and purification, a part of the compressed air containing impurities is discharged to the outside, and another part of the clean compressed air flows back through the circulation pipeline, and flows into the compressor through the second air inlet of the air intake device and the air outlet of the air intake device in sequence.

4. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 3, characterized in that: When the solenoid valve is powered on, the amount of outside air entering the first air inlet of the air intake device per unit time is less than the amount of outside air entering the first air inlet of the air intake device per unit time when the solenoid valve is powered off.

5. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 1, characterized in that: The air intake device includes a muffler and an air intake valve, the air outlet of the muffler is connected to the air inlet of the air intake valve, the two air inlets arranged on the muffler are the first air inlet and the second air inlet of the air intake device, and the air outlet of the air intake valve is the air outlet of the air intake device.

6. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 1 or 5, characterized in that: The wind source device for rail vehicles also includes an air filter for filtering solid impurities in the air. The air filter is arranged upstream of the air intake device, the air inlet of the air filter is connected to the air source, and the air outlet of the air filter is connected to the first air inlet of the air intake device.

7. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 1, characterized in that: The wind source device for rail vehicles also includes a controller. A moisture sensor for detecting the moisture content in the oil and gas barrel and a first liquid level sensor for detecting the oil level in the oil and gas barrel are provided in the oil and gas barrel of the compressor. The detection signal output end of the moisture sensor and the detection signal output end of the first liquid level sensor are electrically connected to the detection signal receiving end of the controller respectively, and the control signal output end of the controller is electrically connected to the control end of the solenoid valve.

8. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 7, characterized in that: A cooler is arranged between the high-pressure air outlet of the compressor and the air inlet of the air drying and purification device. A second liquid level sensor for detecting the oil level in the cooler is arranged inside the cooler. The detection signal output end of the second liquid level sensor is electrically connected to the detection signal receiving end of the controller.

9. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 8, characterized in that: A safety valve is provided between the high-pressure air outlet of the compressor and the air inlet of the cooler, and a control end of the safety valve is electrically connected to a control signal output end of the controller.

10. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 8, characterized in that: The air outlet of the cooler is connected to the air inlet of the air drying and purification device through a hose.

11. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 1, characterized in that: The air drying and purification device comprises a pre-filter, a double-tower dryer and a post-filter, wherein the pre-filter, the double-tower dryer and the post-filter are sequentially connected along the flow direction of air.

12. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 11, characterized in that: A first overflow valve is provided on the downstream main air duct, and the first overflow valve is located downstream of the connection position between the downstream main air duct and the circulation duct; The opening pressure of the first relief valve meets the following conditions: P 测 ≤P 溢1 <P 启2 ; Among them, the P 测 The minimum pressure required to monitor the working status of the double towers in the double tower dryer; the P 溢1 is the opening pressure of the first relief valve; 启2 It is the total wind pressure when two wind source devices in a rail vehicle are started simultaneously.

13. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 11, characterized in that: A second overflow valve or a throttle valve is provided on the circulation pipeline, and the conditions required to open the second overflow valve are the same as the conditions required to open the throttle valve; The opening pressure of the second relief valve meets the following conditions: P AD ≤P 溢2 <P 止 ; Among them, the P AD The pressure required for the double tower dryer to work normally; 溢2 is the opening pressure of the second relief valve; 止 It is the total wind pressure when the wind source device stops supplying air.

14. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 1, characterized in that: In step S3, if the wind source device for the rail vehicle is in the circulation operation mode and needs to supply air to the rail vehicle, the wind source device for the rail vehicle switches to the normal air supply mode until the total wind pressure is equal to the total wind pressure when the wind source device for the rail vehicle stops supplying air.

15. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 14, characterized in that: Recording the operation time when the rail vehicle air source device switches to the normal air supply mode as the sixth time; The sixth time is compared with the third time. If the sixth time is less than the third time, the wind source device for the rail vehicle is switched to the circulation operation mode again until the continuous operation time of the wind source device for the rail vehicle reaches the third time and then the device is stopped. Wherein, the sixth time is determined by the actual recording time.

16. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 15, characterized in that: If the continuous operation time of the wind source device for the rail vehicle reaches a third time, the wind source device for the rail vehicle is in a circulation operation mode, and the wind source device for the rail vehicle is directly shut down; If the continuous operation time of the wind source device for a rail vehicle reaches a third time, the wind source device for a rail vehicle is in a normal air supply mode, and the wind source device for a rail vehicle supplies air until the total wind pressure is equal to the total wind pressure when the wind source device for a rail vehicle stops supplying air and then shuts down.

17. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 1, characterized in that: After step S3, the method further includes collecting water content data in the lubricating oil in the oil and gas barrel of the compressor through a water sensor; if the water content is less than a preset water content threshold, the rail vehicle wind source device remains in a shutdown state; if the water content is greater than or equal to the preset water content threshold, the rail vehicle wind source device is controlled to enter a circulation operation mode, or the liquid water in the oil and gas barrel of the compressor is first discharged and then the rail vehicle wind source device is controlled to enter a circulation operation mode.

18. The method for monitoring the working state of a wind source device for a rail vehicle according to claim 1, characterized in that: The oil level data in the compressor is collected by the first liquid level sensor, and the oil level data in the cooler is collected by the second liquid level sensor to obtain the total amount of lubricating oil in the wind source device for the rail vehicle; if the total amount of lubricating oil in the wind source device for the rail vehicle is less than a preset lubricating oil content threshold, the lubricating oil is added to the wind source device for the rail vehicle.

Images