Monitoring method and system for corrugated pipe of aircraft air conditioning system

Abstract

The invention relates to a monitoring method and system for a corrugated pipe of an aircraft air conditioning system. The method comprises the following steps that S1, data of the opening degree of an outflow valve and the air inlet flow of the air conditioning system are collected; s2, the positive correlation relation between the outflow valve opening degree and the air inlet flow of the air conditioning system is established; s3, the range of the normal stable balance state of the opening degree of the outflow valve and the air inlet flow of the air conditioning system is set; s4, when one of the opening degree of the outflow valve and the air inlet flow of the air conditioning system deviates from the normal stable balance state; monitoring data of a corrugated pipeline of the air conditioning system are called; and S5, the monitoring data are processed, and the fault condition of the corrugated pipeline of the air conditioning system is obtained. Compared with the prior art, the method has the advantages that the fault of the corrugated pipeline of the air conditioning system is efficiently and accurately checked, the detection efficiency is improved, and the cost consumption of aviation equipment and manpower is reduced.

Description

Technical Field

[0001] The present invention relates to the field of constant pressure sealing of aircraft cabins, and particularly to a monitoring method and system for bellows of an aircraft air conditioning system. Background Art

[0002] An aircraft flies at high altitude and tries to keep the pressure in the sealed cabin environment at one atmosphere. Under normal circumstances, in order to keep the cabin pressure stable, an aircraft cabin pressurization system needs to be used during flight. The aircraft cabin pressurization system mainly realizes pressurizing the sealed cabin environment at high altitude and adjusting it to a suitable cabin air pressure environment to provide a suitable air and pressure environment for passengers. When a high-altitude cabin decompression occurs, the cabin pressure drops rapidly, and the cabin altitude rises rapidly. When the cabin altitude rises to a certain height, the oxygen mask will automatically drop to provide backup oxygen for passengers. At this time, the aircraft needs to descend or land as soon as possible.

[0003] Therefore, high-altitude cabin decompression has great safety hazards and high risks. According to the fault statistics of cabin depressurization events, the main reasons involve skin valves, dual air conditioning bleed system failures, outflow valves, safety valves, etc. Among them, the breakage of the bellows in the air conditioning system will also cause air leakage in the aircraft cabin, and then the cabin will lose pressure, and the aircraft cabin pressurization system will not be able to work properly. However, due to the very hidden location of the bellows in the air conditioning system, it is difficult to detect when a failure occurs during technical inspections. If all relevant components of the aircraft are disassembled and inspected, it will result in low detection efficiency and high labor costs. If the troubleshooting cannot be carried out efficiently, it will pose a great safety hazard to the safe flight of the aircraft. In the prior art, there is a lack of a technical solution to monitor the bellows of the aircraft air conditioning system and thus eliminate air leakage in the aircraft cabin. Therefore, the present invention provides a monitoring method and system for bellows of an aircraft air conditioning system. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects existing in the prior art and provide a monitoring method and system for bellows of an aircraft air conditioning system.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] In a first aspect, the present invention provides a monitoring method for bellows of an aircraft air conditioning system, including the following steps:

[0007] Step S1, collecting data on the opening degree of the outflow valve and the intake air flow of the air conditioning system;

[0008] Step S2, establishing a positive correlation between the opening degree of the outflow valve and the intake air flow of the air conditioning system;

[0009] Step S3: Set the range of the normal and stable balance state of the outflow valve opening and the intake air flow rate of the air conditioning system. Among them, the normal and stable balance state includes the normal and stable balance state of the outflow valve opening and the normal and stable balance state of the intake air flow rate of the air conditioning system;

[0010] Step S4: When the outflow valve opening deviates from the normal and stable balance state of the outflow valve opening, or both the outflow valve opening and the intake air flow rate of the air conditioning system deviate from the normal and stable balance state, call the monitoring data of the corrugated pipe of the air conditioning system;

[0011] Step S5: Process the monitoring data to detect the fault condition of the corrugated pipe of the air conditioning system.

[0012] Further, the range of the normal and stable balance state of the outflow valve opening is 6 - 20 degrees.

[0013] Further, the range in which the outflow valve opening deviates from the normal and stable balance state is that the outflow valve opening is less than 6 degrees.

[0014] Further, the range of the normal and stable balance state of the intake air flow rate of the air conditioning system is 0.35 - 0.65 kg / s.

[0015] Further, the range in which the intake air flow rate of the air conditioning system deviates from the normal and stable balance state is greater than 0.65 kg / s.

[0016] In a second aspect, the present invention provides a monitoring system for the corrugated pipe of an aircraft air conditioning system, including an outflow valve opening monitoring device, an air intake device of the air conditioning system, and a computer. The outflow valve opening monitoring device and the air intake device of the air conditioning system are respectively connected to the computer, and transmit the outflow valve opening data and the air intake flow rate data of the air conditioning system to the computer. The system is used to implement the above-mentioned monitoring method for the corrugated pipe of an aircraft air conditioning system.

[0017] In a third aspect, the present invention provides an electronic device, including a processor, a memory, a user interface, and a network interface. The memory is used to store instructions, the user interface and the network interface are used to communicate with other devices, and the processor is used to execute the instructions stored in the memory so that the electronic device executes the above-mentioned method.

[0018] In a fourth aspect, the present invention provides a storage medium, on which a program is stored, and when the program is executed, the above-mentioned method is implemented.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] By monitoring the trends of the intake air flow rate and the outflow valve opening degree of the air conditioning system, the present invention can monitor the state of the corrugated pipe, efficiently and accurately detect faults in the corrugated pipe of the air conditioning system, reduce the risk of aircraft safety accidents, improve the detection efficiency, and reduce the consumption of aviation materials and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic flow chart of the steps of the present invention;

[0022] Figure 2 is a schematic diagram showing the abnormal relationship between the outflow valve opening degree and the intake air flow rate of the air conditioning system of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and the detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0024] This embodiment provides a monitoring method for the corrugated pipe of an aircraft air conditioning system, as Figure 1 shown, the principle of this monitoring method is:

[0025] When the aircraft is flying at high altitude, the cabin closed environment is in a closed and constant pressure state. In order to keep the cabin pressure stable, during flight operations, the air source of the bleed air system needs to be used to supply appropriate air to the cabin interior through the air conditioning system. At the same time, an outflow valve device that continuously releases "excess" air is required to discharge the excess air outside the aircraft. The outflow valve of the cabin pressurization system maintains a certain opening degree to release a certain amount of air. Through the cooperation of inflation and deflation, under the control of the computer CPC, a cooperation is formed between the outflow valve opening degree and the intake air flow rate of the air conditioning system to achieve the balance purpose of the air entering and leaving the cabin interior, so that the entire aircraft body and the cabin environment can be in a suitable pressure environment at different flight altitudes and flight stages.

[0026] To maintain the cabin pressure balance, the computer controls the supply of the air flow rate of the air conditioning system and the opening degree of the outflow valve according to the number of passengers and other user requirements such as cargo hold ventilation. During the ground stage, the outflow valve is in the fully open state. During the takeoff stage, the outflow valve will gradually close to a smaller angle. During the landing stage, the outflow valve will gradually open to the fully open position.

[0027] During the stable cruising state in the air, the external environment is relatively stable, and the aircraft cabin is a closed space. The air conditioning system provides fresh air to pressurize and inflate the cabin. The gas in the aircraft cabin continuously diffuses and expands. To maintain the cabin internal pressure environment in a stable and balanced state, to maintain the balance, at this time, the supply of the intake air flow rate of the air conditioning system and the opening degree of the outflow valve are in a positive correlation relationship.

[0028] If the components involved in the cabin pressurization environment are damaged or defective, resulting in air leakage, in order to maintain the cabin pressure balance, the computer will increase the inlet flow rate of the air conditioner. At the same time, it may also reduce the opening of the outflow valve to reduce the excessive loss of air inside the cabin. At this time, the inlet flow rate of the air conditioner and the angle of the outflow valve will deviate from the normal stable balance state. In terms of the control law, the outflow valve, as the follower, mainly adjusts according to the size of the intake air flow rate of the air conditioner. Therefore, when the outflow valve opening becomes smaller under normal air conditioner flow conditions, or when the air conditioner system flow automatically increases normally and the computer controls the outflow valve to a smaller angle, the constant pressure environment of the aircraft cabin may be unbalanced. Therefore, by monitoring the opening of the outflow valve, the air leakage of the airframe components can be monitored to a certain extent.

[0029] For Airbus aircraft, according to the failure statistics, it mainly involves the skin outlet valve, the rupture of the corrugated pipe of the air conditioning system, and the failure of the outflow valve. The rupture of the corrugated pipe of the air conditioning system is not easy to detect and is the main hidden risk source causing the cabin to decompress and the cabin altitude to rise. The PACK component of the air conditioning system regulates and cools the high-temperature and high-pressure bleed air from the engine to the appropriate temperature air, and then enters the mixing chamber through the corrugated pipe and the check valve for cabin ventilation and pressurization. If the corrugated pipe leaks seriously and the pressurized air flow rate decreases, the cabin pressurization requirements cannot be met.

[0030] According to the characteristics of this hidden air leakage during the cabin pressurization process, by counting the opening of the outflow valve during the normal cruise stage of more than 200,000 flights, as Figure 2 shown, under normal cruise and stable conditions, the opening of the outflow valve is above 6 degrees. By counting the total duration below 6 degrees during the flight and combining the inlet flow rate data of the air conditioning component, it is determined through screening and sorting that the opening of the outflow valve with potential aircraft faults is below 6 degrees.

[0031] The method for monitoring the corrugated pipe of the aircraft air conditioning system specifically includes the following steps:

[0032] Step S1: Collect the data of the opening of the outflow valve and the intake air flow rate of the air conditioning system.

[0033] Step S2: Establish a positive correlation between the opening of the outflow valve and the intake air flow rate of the air conditioning system.

[0034] Step S3: Set the range of the normal stable balance state of the opening of the outflow valve and the intake air flow rate of the air conditioning system; among them, the normal stable balance state includes the normal stable balance state of the opening of the outflow valve and the normal stable balance state of the intake air flow rate of the air conditioning system.

[0035] Specifically, the range of the normal stable equilibrium state of the outflow valve opening is 6 - 20 degrees. The range of the normal stable equilibrium state of the air intake flow rate of the air conditioning system is 0.35 - 0.65 kg / s, and the average flow rate is 0.5 kg / s.

[0036] Step S4: When the outflow valve opening and the air intake flow rate of the air conditioning system deviate from the normal stable equilibrium state; specifically, as Figure 2 shown, when the outflow valve opening is lower than 6 degrees and the air intake flow rate of the air conditioning system is greater than 0.65 kg / s, the monitoring data of the corrugated pipe of the air conditioning system is called.

[0037] Step S5: The computer processes the monitoring data, focuses on detecting the fault conditions of the corrugated pipe of the air conditioning system, whether there are damages or clamp loosening phenomena. In addition, when the air intake flow rate of the air conditioning system shows a continuous large flow rate and the outflow valve is continuously low, and the trend deteriorates, the air leakage condition of the air conditioning system is focused on inspection.

[0038] In a second aspect, the present embodiment provides a monitoring system for the corrugated pipe of an aircraft air conditioning system, including an outflow valve opening monitoring device, an air intake device of the air conditioning system, and a computer. The outflow valve opening monitoring device and the air intake device of the air conditioning system are respectively connected to the computer, and transmit the outflow valve opening data and the air intake flow rate data of the air conditioning system to the computer. The system is used to implement the monitoring method for the corrugated pipe of an aircraft air conditioning system mentioned in Embodiment 1.

[0039] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A monitoring method for a bellows of an aircraft air conditioning system, characterized in that, Including the following steps: Step S1, collect data on the opening degree of the outflow valve and the intake air flow rate of the air conditioning system; Step S2, establish a positive correlation between the opening degree of the outflow valve and the intake air flow rate of the air conditioning system; Step S3, set the range of the normal stable equilibrium state of the opening degree of the outflow valve and the intake air flow rate of the air conditioning system, wherein the normal stable equilibrium state includes the normal stable equilibrium state of the opening degree of the outflow valve and the normal stable equilibrium state of the intake air flow rate of the air conditioning system; Step S4, when the opening degree of the outflow valve deviates from the normal stable equilibrium state of the opening degree of the outflow valve, or both the opening degree of the outflow valve and the intake air flow rate of the air conditioning system deviate from the normal stable equilibrium state, call the monitoring data of the corrugated pipe of the air conditioning system; Step S5, process the monitoring data to detect the fault condition of the corrugated pipe of the air conditioning system.

2. The monitoring method of the corrugated pipe of an aircraft air conditioning system according to claim 1, characterized in that The range of the normal stable equilibrium state of the opening degree of the outflow valve is 6 - 20 degrees.

3. A monitoring method for a corrugated pipe of an aircraft air conditioning system according to claim 2, characterized in that, The range in which the opening degree of the outflow valve deviates from the normal stable equilibrium state is that the opening degree of the outflow valve is less than 6 degrees.

4. A monitoring method for a corrugated pipe of an aircraft air conditioning system according to claim 1, characterized in that, The range of the normal stable equilibrium state of the intake air flow rate of the air conditioning system is 0.35 - 0.65 kg / second.

5. The monitoring method of a corrugated pipe of an aircraft air conditioning system according to claim 4, characterized in that, The range in which the intake air flow rate of the air conditioning system deviates from the normal stable equilibrium state is greater than 0.65 kg / second.

6. A monitoring system for a corrugated pipe of an aircraft air conditioning system, characterized in that, Including an outflow valve opening degree monitoring device, an air conditioning system intake device, and a computer. The outflow valve opening degree monitoring device and the air conditioning system intake device are respectively connected to the computer and transmit the outflow valve opening degree data and the air conditioning system intake air flow rate data to the computer. The system is used to implement the monitoring method of a corrugated pipe of an aircraft air conditioning system described in claim 1.

7. The monitoring system of a corrugated pipe of an aircraft air conditioning system according to claim 6, characterized in that, The range of the normal stable equilibrium state of the opening degree of the outflow valve is 6 - 20 degrees.

8. The monitoring system of the corrugated pipe of an aircraft air conditioning system according to claim 6, characterized in that, The range of the normal stable equilibrium state of the intake air flow rate of the air conditioning system is 0.35 - 0.65 kg / second.

9. An electronic device, characterized in that, Including a processor, a memory, a user interface, and a network interface. The memory is used to store instructions. The user interface and the network interface are used to communicate with other devices. The processor is used to execute the instructions stored in the memory so that the electronic device executes the method described in any one of claims 1 - 5.

10. A storage medium, on which a program is stored, characterized in that, When the program is executed, it implements the method described in any one of claims 1 - 5.

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