Maintenance and detection system for aircraft airbag deicing system

Abstract

The utility model belongs to the technical field of aircraft airbag deicing system maintenance and detection design, and particularly relates to an aircraft airbag deicing system maintenance and detection system which is designed in a way that a maintenance detector is connected with an air entraining header pipe temperature sensor, an air entraining header pipe pressure sensor, an air entraining branch pipe pressure sensor and a deicing distributor. By detecting the temperature of air flow in the air entraining main pipe, the air flow pressure in the air entraining main pipe, the air flow pressure in each air entraining branch pipe and the air flow pressure at the outlet of the deicing distributor, the fault of the air bag deicing system is correspondingly output, the method is efficient and convenient, and omission is not prone to occurring.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft airbag deicing system maintenance and detection design, and specifically relates to an aircraft airbag deicing system maintenance and detection system. Background Art

[0002] When an aircraft flies in clouds containing supercooled water droplets, many parts will be frozen, which will deteriorate the aircraft's lift and drag characteristics and reduce the aircraft's flight safety. For this purpose, an airbag de-icing system is designed.

[0003] The aircraft airbag de-icing system is a mechanical de-icing system, including a bleed air main pipe and multiple bleed air branches connected to the bleed air main pipe through a de-icing distributor. An inflatable airbag is provided at the end of each bleed air branch pipe. Each airbag is arranged on the surface of multiple anti-icing areas on the aircraft. When ice forms on the surface of the anti-icing area on the aircraft, high-temperature, high-pressure gas is introduced through the bleed air main pipe, distributed by the de-icing distributor, and then filled into each airbag through each bleed air branch pipe, so that each airbag is periodically inflated to burst the ice layer, thereby achieving de-icing of the anti-icing area. A bleed air control valve is provided on the bleed air main pipe, and the de-icing distributor can control the bleed air pressure by opening and closing, and discharge the gas during the airbag exhaust stage. A safety valve is also provided, which opens when the pressure regulating function of the de-icing distributor fails to prevent overpressure downstream.

[0004] Currently, maintenance on aircraft airbag de-icing systems is mostly performed through visual inspection or confirmation inspection using dedicated equipment. The airbag de-icing system has a complex piping distribution, and the airbags are distributed in many locations on the aircraft and are difficult to reach. This places a heavy burden on maintenance personnel, is time-consuming and labor-intensive, and is prone to omissions.

[0005] This application is proposed in view of the above-mentioned technical defects. Utility Model Content

[0006] The purpose of the present application is to provide an aircraft airbag de-icing system maintenance and detection system to overcome or alleviate at least one of the existing technical deficiencies.

[0007] The technical solution of this application is:

[0008] An aircraft airbag de-icing system maintenance and detection system, comprising:

[0009] The bleed air main pipe temperature sensor is installed on the bleed air main pipe before the bleed air control valve to detect the temperature of the air flow in the bleed air main pipe;

[0010] The bleed air main pipe pressure sensor is installed on the bleed air main pipe before the bleed air control valve to detect the air flow pressure in the bleed air main pipe;

[0011] Multiple bleed air branch pipe pressure sensors are provided on each bleed air branch pipe to detect the air flow pressure in each bleed air branch pipe;

[0012] Maintain the detector, connect the bleed air main pipe temperature sensor, the bleed air main pipe pressure sensor and each bleed air branch pipe pressure sensor, record the temperature of the air flow in the bleed air main pipe, the pressure of the air flow in the bleed air main pipe and the pressure of the air flow in each bleed air branch pipe, when the temperature of the air flow in the bleed air main pipe exceeds the allowable range of change of the air flow temperature in the bleed air main pipe, the pressure of the air flow in the bleed air main pipe exceeds the allowable range of change of the air flow pressure in the bleed air main pipe, and the pressure of the air flow in each bleed air branch pipe does not meet the allowable pressure changes in the air bag inflation and exhaust stages, the corresponding output air bag de-icing system failure.

[0013] According to at least one embodiment of the present application, in the above-mentioned aircraft airbag de-icing system maintenance and detection system, the allowable range of the air flow temperature in the bleed air main is 125±5°C, and the allowable range of the air flow pressure in the bleed air main is 260±20kPa.

[0014] According to at least one embodiment of the present application, in the above-mentioned aircraft airbag de-icing system maintenance and inspection system, the allowable pressure change during the airbag inflation stage is that the pressure of the airflow in the bleed air branch is not less than 109 kPa, and the duration does not exceed 2 seconds, and the allowable pressure change during the airbag de-airing stage is that the vacuum degree generated by the airflow in the bleed air branch is not less than 24 kPa.

[0015] According to at least one embodiment of the present application, in the above-mentioned aircraft airbag de-icing system maintenance and detection system, a detector is maintained in connection with the de-icing dispenser to detect and record the pressure of the airflow at the de-icing dispenser outlet. When the pressure of the airflow at the de-icing dispenser outlet exceeds the allowable variation range of the airflow pressure at the de-icing dispenser outlet, an airbag de-icing system fault is output accordingly.

[0016] According to at least one embodiment of the present application, in the above-mentioned aircraft airbag de-icing system maintenance and detection system, the allowable range of variation of the de-icing dispenser outlet airflow pressure is 75.8 kPa to 110.3 kPa.

[0017] According to at least one embodiment of the present application, in the above-mentioned aircraft airbag de-icing system maintenance and detection system, the maintenance detector is connected to the bleed air control valve to detect the position status of the bleed air control valve.

[0018] This application has at least the following beneficial technical effects:

[0019] Provided is an aircraft airbag de-icing system maintenance and detection system. The system is designed to maintain a detector connected to a bleed air main pipe temperature sensor, a bleed air main pipe pressure sensor, a bleed air branch pipe pressure sensor, and a de-icing distributor. By detecting the temperature of the airflow in the bleed air main pipe, the airflow pressure in the bleed air main pipe, the airflow pressure in each bleed air branch pipe, and the pressure of the airflow at the de-icing distributor outlet, the system outputs corresponding airbag de-icing system faults. The system is efficient, convenient, and not prone to omissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of an aircraft airbag de-icing system maintenance and detection system provided by an embodiment of the present application;

[0021] in:

[0022] 1-Bleed air main pipe temperature sensor; 2-Bleed air control valve; 3-Bleed air main pipe pressure sensor; 4-Multiple bleed air branch pipe pressure sensors; 5-Maintenance detector; 6-De-icing dispenser; 7-Airbag.

[0023] In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. In addition, the drawings are only used for illustrative purposes and should not be understood as limiting this application. DETAILED DESCRIPTION

[0024] To make the technical solution and its advantages of this application more clear, the technical solution of this application will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only some of the embodiments of this application and are only used to explain this application, not to limit this application. It should be noted that for ease of description, only the parts relevant to this application are shown in the accompanying drawings, and other relevant parts can refer to the general design.

[0025] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application should have the usual meanings understood by those skilled in the art in the field to which this application belongs. The words indicating orientation used in the description of this application are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. The word "include" used in the description of this application means that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects.

[0026] In addition, it should be noted that, unless otherwise clearly stipulated and limited, the words "installation", "connection" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Technical personnel in the field can understand its specific meaning in this application according to the specific circumstances.

[0027] Practice has shown that abnormalities in aircraft airbag deicing systems are often manifested as abnormal airflow temperature and pressure in the bleed air main of the aircraft airbag deicing system, abnormal pressure on the bleed air branch pipe, and failure of the deicing distributor pressure regulating function. Based on this, the present application provides an aircraft airbag deicing system maintenance and detection system, such as Figure 1 shown.

[0028] Aircraft airbag de-icing system maintenance and inspection system, including:

[0029] The bleed air main pipe temperature sensor 1 is installed on the bleed air main pipe and before the bleed air control valve 2 to detect the temperature of the air flow in the bleed air main pipe;

[0030] The bleed air main pipe pressure sensor 3 is installed on the bleed air main pipe and before the bleed air control valve 2 to detect the air flow pressure in the bleed air main pipe;

[0031] Multiple bleed air branch pipe pressure sensors 4 are provided on each bleed air branch pipe to detect the air flow pressure in each bleed air branch pipe;

[0032] Maintain the detector 5, connect it to the bleed air main pipe temperature sensor 1, the bleed air main pipe pressure sensor 3 and each bleed air branch pipe pressure sensor 4, record the temperature of the air flow in the bleed air main pipe, the pressure of the air flow in the bleed air main pipe and the pressure of the air flow in each bleed air branch pipe, when the temperature of the air flow in the bleed air main pipe exceeds the allowable range of change of the air flow temperature in the bleed air main pipe, the pressure of the air flow in the bleed air main pipe exceeds the allowable range of change of the air flow pressure in the bleed air main pipe, and the pressure of the air flow in each bleed air branch pipe does not meet the allowable pressure change during the inflation and deflating stages of the airbag 7, the corresponding output is that the airbag de-icing system fails.

[0033] The allowable range of the air flow temperature in the air bleed main pipe is 125±5℃, the allowable range of the air flow pressure in the air bleed main pipe is 260±20kPa, the allowable pressure change during the inflation stage of airbag 7 is that the pressure of the air flow in the air bleed branch pipe is not less than 109kPa, and the duration does not exceed 2s, and the allowable pressure change during the deflating stage of airbag 7 is that the vacuum generated by the air flow in the air bleed branch pipe is not less than 24kPa.

[0034] The maintenance detector 5 is connected to the bleed air control valve 2 and can detect the position state of the bleed air control valve 2, so as to judge the inflation and deflation stages of the airbag 7 accordingly.

[0035] Maintain the detector 5 connected to the de-icing dispenser 6 to detect and record the pressure of the airflow at the outlet of the de-icing dispenser 6. When the pressure of the airflow at the outlet of the de-icing dispenser 6 exceeds the allowable range of the pressure of the airflow at the outlet of the de-icing dispenser 6, the corresponding output airbag de-icing system failure is detected.

[0036] The allowable range of the air flow pressure at the outlet of the de-icing distributor 6 is 75.8 kPa to 110.3 kPa.

[0037] The de-icing dispenser 6 outputs an open signal when the outlet air flow pressure is lower than 75.8 kPa, and outputs a closed signal when it is higher than 110.3 kPa. When the pressure increases, the pressure value for switching from the open position to the closed position is set to P1, and when the pressure decreases, the pressure value for switching from the closed position to the open position is set to P2. P1-P2 is not less than 1.9 kPa.

[0038] The safety valve opens when the pressure regulating function of the de-icing distributor 6 fails and the outlet air flow pressure is 160kPa±2kPa to prevent downstream overpressure.

[0039] The pressure mentioned in the aircraft airbag de-icing system maintenance and detection system disclosed in the above embodiment is gauge pressure.

[0040] The aircraft airbag de-icing system maintenance and detection system disclosed in the above embodiment is designed to maintain a detector 5 connected to the bleed air main temperature sensor 1, the bleed air main pressure sensor 3, the bleed air branch pressure sensor 4, and the de-icing distributor 6. By detecting the temperature of the airflow in the bleed air main, the airflow pressure in the bleed air main, the airflow pressure in each bleed air branch, and the pressure of the airflow at the outlet of the de-icing distributor 6, the corresponding airbag de-icing system fault is output. This is efficient, convenient, and not prone to omissions.

[0041] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or replacements to the relevant technical features, and the technical solutions after these changes or replacements will fall within the scope of protection of the present application.

Claims

1. An aircraft airbag de-icing system maintenance and detection system, characterized in that: include: A bleed air main pipe temperature sensor (1) is arranged on the bleed air main pipe and before the bleed air control valve (2) to detect the temperature of the air flow in the bleed air main pipe; A bleed air main pipe pressure sensor (3) is provided on the bleed air main pipe and is located before the bleed air control valve (2) to detect the air flow pressure in the bleed air main pipe; A plurality of bleed air branch pipe pressure sensors (4) are provided on each bleed air branch pipe and are used to detect the air flow pressure in each bleed air branch pipe; The detector (5) is connected to the bleed air main pipe temperature sensor (1), the bleed air main pipe pressure sensor (3) and the pressure sensors (4) of each bleed air branch pipe, and records the temperature of the air flow in the bleed air main pipe, the pressure of the air flow in the bleed air main pipe and the pressure of the air flow in each bleed air branch pipe. When the temperature of the air flow in the bleed air main pipe exceeds the allowable range of change of the air flow temperature in the bleed air main pipe, the pressure of the air flow in the bleed air main pipe exceeds the allowable range of change of the air flow pressure in the bleed air main pipe, and the pressure of the air flow in each bleed air branch pipe does not meet the pressure change allowed in the inflation and deflating stages of the air bag (7), the corresponding output is an air bag de-icing system failure.

2. The aircraft airbag de-icing system maintenance and detection system according to claim 1, characterized in that: The allowable range of air flow temperature in the bleed air main pipe is 125±5℃, and the allowable range of air flow pressure in the bleed air main pipe is 260±20kPa.

3. The aircraft airbag de-icing system maintenance and detection system according to claim 1, characterized in that: The pressure change allowed during the inflation phase of the airbag (7) is that the pressure of the airflow in the air duct is not less than 109 kPa and the duration does not exceed 2 seconds. The pressure change allowed during the degassing phase of the airbag (7) is that the vacuum degree generated by the airflow in the air duct is not less than 24 kPa.

4. The aircraft airbag de-icing system maintenance and detection system according to claim 1, characterized in that: The detector (5) is connected to the de-icing distributor (6) to detect and record the pressure of the airflow at the outlet of the de-icing distributor (6). When the pressure of the airflow at the outlet of the de-icing distributor (6) exceeds the allowable variation range of the airflow pressure at the outlet of the de-icing distributor (6), the corresponding airbag de-icing system failure is output.

5. The aircraft airbag de-icing system maintenance and detection system according to claim 4, characterized in that: The allowable range of the air flow pressure at the outlet of the de-icing distributor (6) is 75.8 kPa to 110.3 kPa.

6. The aircraft airbag de-icing system maintenance and detection system according to claim 4, characterized in that: The maintenance detector (5) is connected to the bleed air control valve (2) and can detect the position state of the bleed air control valve (2).

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