Helicopter high-temperature air-bleed oxygen generation control device and method

Abstract

The application provides a helicopter high-temperature air-bleed oxygen production control device and method. The device comprises an engine air-bleed channel (14), an outlet end of the engine air-bleed channel (14) is connected with an inlet end of a heat dissipation assembly (3), an outlet end of the heat dissipation assembly (3) is connected with an inlet of an oxygen production main machine (7) through an air-bleed pipeline (10), and an outlet of the oxygen production main machine (7) is connected with an oxygen supply mask (9) through an oxygen supply pipeline (11). A shut-off valve (2) is arranged on the engine air-bleed channel (14). The outlet of the heat dissipation assembly (3) is respectively provided with a filter (5) and a temperature and pressure sensor (6). The shut-off valve (2) and the temperature and pressure sensor (6) are all connected with an oxygen production controller (1). The application can improve the reliability and safety of a molecular sieve oxygen supply system, avoid high-temperature air from entering the oxygen production main machine, damage the molecular sieve material, and scald the machine personnel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of helicopter environmental control system, and particularly relates to a helicopter high-temperature bleed air oxygen production control device and method. BACKGROUND

[0002] The helicopter molecular sieve oxygen supply device is composed of an oxygen production controller, a shut-off valve, a heat dissipation assembly, a heat dissipation fan, a filter, a temperature and pressure sensor, an oxygen production host, an oxygen partial pressure sensor, and an oxygen supply pipeline. When the molecular sieve oxygen supply device is working, the oxygen production controller sends instructions to each component to start the heat dissipation fan, the shut-off valve and the oxygen production host. The shut-off valve opens to introduce high-temperature and high-pressure air at the engine compressor to the heat dissipation assembly. After being cooled by the heat dissipation fan, the air flows into the filter to remove water, dust and oil. The low-temperature, clean and high-pressure air after treatment enters the oxygen production host to produce oxygen. The molecular sieve needs to introduce high-temperature air from the engine and dissipate heat through the heat dissipation assembly. Due to the reliability of the heat dissipation fan and its control components, there is still a possibility of failure of the heat dissipation assembly. The failure of the heat dissipation fan has a greater impact. First, the molecular sieve material in the oxygen production host is sensitive to high-temperature air. The high-temperature air without heat dissipation can cause the molecular sieve to lose its adsorption performance, reduce the oxygen concentration, and cause the crew to be at risk of oxygen deficiency. Second, the crew inhales the high-temperature air without heat dissipation, which has the risk of scalding. SUMMARY

[0003] The present application aims to provide a helicopter high-temperature bleed air oxygen production control device and method. The present application can improve the reliability and safety of the molecular sieve oxygen supply system, avoid high-temperature air from entering the oxygen production host, and damage the molecular sieve material and scald the crew.

[0004] The technical solution of the present application is a helicopter high-temperature bleed air oxygen production control device, which comprises an engine bleed air channel, the outlet end of the engine bleed air channel is connected with the inlet end of a heat dissipation assembly, the outlet end of the heat dissipation assembly is connected with the inlet of an oxygen production host through a bleed air pipeline, and the outlet of the oxygen production host is connected with an oxygen supply mask through an oxygen supply pipeline. A shut-off valve is arranged on the engine bleed air channel. The outlet of the heat dissipation assembly is respectively provided with a filter and a temperature and pressure sensor. The shut-off valve and the temperature and pressure sensor are connected with an oxygen production controller.

[0005] In the aforementioned helicopter high-temperature bleed air oxygen production control device, an oxygen concentration sensor is arranged at the outlet of the oxygen production host.

[0006] In the aforementioned helicopter high-temperature bleed air oxygen production control device, the oxygen production controller is connected with a host computer.

[0007] In the aforementioned helicopter high-temperature bleed air oxygen production control device, the host computer is connected with an electromechanical display.

[0008] The use method of the helicopter high-temperature bleed air oxygen generation control device, when the molecular sieve oxygen supply device is working normally, the temperature and pressure sensor collects the air temperature and pressure at the outlet of the heat dissipation assembly in real time, and transmits the collected temperature and pressure values to the oxygen generation controller, and the oxygen generation controller compares the temperature and pressure values with the preset temperature and pressure limit values to determine the working state of the heat dissipation fan of the heat dissipation assembly: when the collected temperature and pressure values are greater than the preset temperature and pressure limit values, it is determined that the heat dissipation fan is faulty, and the shut-off valve is immediately closed to prevent high-temperature air from entering the oxygen generation main machine and improve the reliability of the molecular sieve oxygen supply device.

[0009] In the use method of the helicopter high-temperature bleed air oxygen generation control device, when the helicopter is flying normally and the molecular sieve oxygen supply device is not working, a small amount of high-temperature bleed air from the engine will flow through the shut-off valve to the rear oxygen generation main machine, at this time, the oxygen generation controller and the temperature and pressure sensor are still in working state, and the heat dissipation fan is in standby state, the temperature and pressure sensor collects the air temperature and pressure at the outlet of the heat dissipation assembly in real time, and transmits the collected temperature and pressure values to the oxygen generation controller, and the oxygen generation controller compares the temperature and pressure values with the preset temperature and pressure limit values to determine the working state of the heat dissipation fan: when the collected temperature and pressure values are greater than the preset temperature and pressure limit values, it is determined that the temperature or pressure is too high, and the heat dissipation fan is immediately started to prevent high-temperature air from entering the oxygen generation main machine.

[0010] In the use method of the helicopter high-temperature bleed air oxygen generation control device, before the molecular sieve oxygen supply device of the helicopter works normally, the heat dissipation fan is started first, and the shut-off valve is opened after 3 seconds; when the molecular sieve oxygen supply device is closed, the oxygen generation controller first closes the shut-off valve, and then stops the heat dissipation fan after 3 seconds. This method prevents a small amount of engine high-temperature air without heat dissipation from entering the oxygen generation main machine and damaging the molecular sieve material.

[0011] In the use method of the helicopter high-temperature bleed air oxygen generation control device, the oxygen generation controller receives the oxygen concentration value collected by the oxygen concentration sensor at the outlet of the oxygen generation main machine, compares the collected oxygen concentration value with the preset oxygen concentration limit value, and determines the working state of the oxygen generation main machine.

[0012] In the use method of the helicopter high-temperature bleed air oxygen generation control device, the oxygen generation controller transmits the working information and fault information of the oxygen supply device to the electromechanical display through the upper computer to provide the crew with real-time working state of the molecular sieve oxygen supply device.

[0013] Advantages

[0014] Compared with the prior art, according to the characteristics of the high-temperature air-oxygen generation of the helicopter engine, the working states of various system components are controlled by optimizing the control logic of the oxygen generation control device, so that a small amount of high-temperature air of the engine can be avoided from entering the oxygen generation main machine when the oxygen generation system is started and stopped, the states of various components of the system can be monitored in real time, remedial measures can be taken when the related components fail, the reliability and safety of the molecular sieve oxygen supply system can be improved, high-temperature air can be avoided from entering the oxygen generation main machine, and the molecular sieve material can be prevented from being damaged and the crew from being scalded. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The figure is a structural schematic diagram of the present application.

[0016] The figure is a structural schematic diagram of the present application. DETAILED DESCRIPTION

[0017] Embodiment 1. A high-temperature air-oxygen generation control device for a helicopter, which is composed of Figure 1 as shown in the figure, and includes an oxygen generation controller 1, a shut-off valve 2, a heat dissipation assembly 3, a heat dissipation fan 4, a filter 5, a temperature and pressure sensor 6, and an oxygen generation main machine 7.

[0018] When starting oxygen generation, the oxygen generation controller 1 first starts the heat dissipation fan 4, then opens the shut-off valve 2 to lead high-temperature and high-pressure air from the engine air inlet, enters the heat dissipation assembly 3 for temperature reduction and flow limitation, the air after temperature reduction enters the filter 5 for water removal, dust removal and oil removal treatment. At the same time, the temperature and pressure sensor 6 located at the rear end of the filter 5 collects the temperature and pressure of the air, and sends them to the oxygen generation controller 1, so that the oxygen generation controller 1 judges whether the introduced air meets the requirements of the molecular sieve oxygen generation, and finally the treated low-temperature, clean and high-pressure air enters the oxygen generation main machine 7 for oxygen generation.

[0019] During the oxygen generation process, the oxygen generation controller 1 monitors the air state at the inlet of the shut-off valve 2, the heat dissipation fan 4, the temperature and pressure sensor 6 and the oxygen generation main machine 7 in real time, and takes remedial measures in time according to the working state and fault condition of each component.

[0020] When the air temperature collected by the temperature and pressure sensor 6 is greater than or equal to 80℃, the oxygen generation controller 1 judges that the heat dissipation fan 4 fails, and immediately closes the shut-off valve 2 to avoid high-temperature air from entering the oxygen generation main machine 7;

[0021] When the air pressure collected by the temperature and pressure sensor 6 is less than 50kPa, the oxygen generation controller 1 judges that the shut-off valve 2 is not opened, and immediately closes the oxygen generation system;

[0022] When the temperature and pressure sensor 6 collects air temperature less than -55℃ or temperature greater than 119℃, the oxygen production controller 1 judges that the temperature and pressure sensor 6 is faulty, and immediately closes the oxygen production system.

[0023] When the temperature and pressure sensor 6 collects air pressure less than 0 or greater than 1000kpa, the oxygen production controller 1 judges that the temperature and pressure sensor 6 is faulty, and immediately closes the oxygen production system.

[0024] The oxygen production controller 1 transmits the working information and fault information of the molecular sieve oxygen supply device to the electromechanical display 13 through the electromechanical computer 12, so as to provide the working personnel with the real-time working state of the molecular sieve oxygen supply device.

[0025] When the oxygen production system is closed, the oxygen production controller 1 first closes the shutoff valve 2, and then stops the cooling fan 4 after 3 seconds to avoid high-temperature bleed air entering the oxygen production main machine;

[0026] When the helicopter is normally flying and the oxygen production system is not working, the oxygen production controller 1 and the temperature and pressure sensor 6 continue to maintain the working state, and the cooling fan 4 is in standby state. The oxygen production controller 1 judges the shutoff valve's gas leakage amount by monitoring the collection data of the temperature and pressure sensor 6 in real time. If the air temperature collected by the temperature and pressure sensor 6 is greater than 100℃, the oxygen production controller 1 judges that the shutoff valve 2's gas leakage amount is too large, and the oxygen production controller 1 sends a command to immediately start the cooling fan 4 to avoid high-temperature bleed air entering the oxygen production main machine. If the air pressure collected by the temperature and pressure sensor 6 is greater than 80kPa, the oxygen production controller 1 judges that the shutoff valve 2's gas leakage amount is too large, and the oxygen production controller 1 sends a command to start the cooling fan 4 to avoid high-temperature bleed air entering the oxygen production main machine.

[0027] Embodiment 2. An oxygen production control device for helicopter high-temperature bleed air, which is composed as shown in Figure 1 The outlet end of the engine bleed air channel 14 is connected with the inlet end of the cooling assembly 3, the outlet end of the cooling assembly 3 is connected with the inlet of the oxygen production main machine 7 through the bleed air pipeline 10, and the outlet of the oxygen production main machine 7 is connected with the oxygen supply mask 9 through the oxygen supply pipeline 11. The shutoff valve 2 is arranged on the engine bleed air channel 14. The outlet of the cooling assembly 3 is respectively provided with the filter 5 and the temperature and pressure sensor 6. The shutoff valve 2 and the temperature and pressure sensor 6 are both connected with the oxygen production controller 1. The outlet of the oxygen production main machine 7 is provided with the oxygen concentration sensor 8. The oxygen production controller 1 is connected with the upper computer 12. The upper computer 12 is connected with the electromechanical display 13.

[0028] The working principle is as follows:

[0029] First, when the helicopter molecular sieve oxygen supply device is working normally, start the cooling fan first, and open the shutoff valve after 3 seconds. When the molecular sieve oxygen supply device is turned off, the oxygen production controller first closes the shutoff valve, and then stops the cooling fan after 3 seconds, to prevent a small amount of high-temperature engine air without cooling from entering the oxygen production main machine and damaging the molecular sieve material; secondly, when the molecular sieve oxygen supply device is working normally, the temperature and pressure sensor collects the air temperature and pressure at the outlet of the cooling assembly in real time, and transmits the temperature and pressure values to the oxygen production controller. The oxygen production controller compares the temperature and pressure limit values set by it to determine whether the cooling fan is working normally. If the cooling fan fails, the shutoff valve is immediately closed to prevent high-temperature air from entering the oxygen production main machine and improve the reliability of the molecular sieve oxygen supply device; finally, when the helicopter is flying normally and the molecular sieve oxygen supply device is not working, a small amount of high-temperature bleed air from the engine will flow to the rear oxygen production main machine through the shutoff valve. At this time, the oxygen production controller and the temperature and pressure sensor are still in working condition, and the cooling fan is in standby state. The temperature and pressure sensor collects the air temperature and pressure at the outlet of the cooling assembly in real time, and transmits the temperature and pressure values to the oxygen production controller. The oxygen production controller compares the temperature and pressure limit values set by it to determine whether the cooling fan is working normally. If the temperature or pressure is too high, the cooling fan is immediately started to prevent high-temperature air from entering the oxygen production main machine.

[0030] The key control nodes of the technical scheme of the present application are as follows:

[0031] 1) The oxygen production controller 1 in the system is used to control the start and stop of the shutoff valve 2, the cooling fan 4 and the oxygen production main machine 7, and receives the temperature and pressure signals of the temperature and pressure sensor 6;

[0032] 2) When the oxygen production system is turned on, the cooling fan 4 is started first, and the shutoff valve 2 is opened after 3 seconds when the oxygen supply device switch is opened and the cooling fan is fully in working condition. When the oxygen production system is turned off, the shutoff valve 2 is closed first, and the cooling fan 4 is stopped after 3 seconds, to prevent a small amount of high-temperature engine air without cooling from entering the oxygen production main machine 7 and damaging the molecular sieve material;

[0033] 3) When the oxygen production system is working normally, if the temperature and pressure sensor 6 collects an air temperature greater than or equal to 80℃, the oxygen production controller 1 determines that the cooling fan 4 has failed, and immediately closes the shutoff valve 2 to prevent high-temperature bleed air from entering the oxygen production main machine 7;

[0034] 4) When the oxygen production system is working normally, if the temperature and pressure sensor 6 collects an air pressure less than 50kPa, the oxygen production controller 1 determines that the shutoff valve 2 has not been opened, and immediately closes the oxygen production system;

[0035] 5) The system of the oxygen controller 1, the oxygen system works normally, the heat dissipation component outlet temperature is at room temperature to 100 ℃, considering the use of environmental temperature, the minimum temperature is-55 ℃, if the air temperature collected by the temperature and pressure sensor 6 is less than-55 ℃ or greater than 119 ℃, the oxygen controller 1 judges that the temperature and pressure sensor 6 is faulty, and immediately closes the oxygen system;

[0036] 6) The system of the oxygen controller 1, the oxygen system works normally, the engine bleed air pressure range is 200 kpa-800 kpa, if the air pressure collected by the temperature and pressure sensor 6 is less than 0 or greater than 1000 kpa, the oxygen controller 1 judges that the temperature and pressure sensor 6 is faulty, and immediately closes the oxygen system;

[0037] 7) The helicopter normally flies, the oxygen system does not work, the oxygen controller 1 and the temperature and pressure sensor 6 in the system continue to work, and the heat dissipation fan 4 is in standby state;

[0038] 8) The helicopter normally flies, the oxygen system does not work, and there is a part of high-temperature and high-pressure flow in the closing valve, about 3 kg / h, the highest temperature of the bleed air is 316 ℃, and after the laboratory test, the high-temperature gas of 316 ℃ is not more than 100 ℃ after being cooled by the heat dissipation component. If the air temperature collected by the temperature and pressure sensor 6 in the system is greater than 100 ℃, the oxygen controller 1 judges that the flow of the closing valve 2 is too large, the oxygen controller 1 sends a command to start the heat dissipation fan 4, and the high-temperature bleed air is prevented from entering the oxygen main machine 7;

[0039] 9) The helicopter normally flies, the oxygen system does not work, and there is a part of high-temperature and high-pressure flow in the closing valve, about 3 kg / h, and after the laboratory test, the pressure of the flow gas after being cooled by the heat dissipation component is not more than 80 kpa. If the air pressure collected by the temperature and pressure sensor 6 in the system is greater than 80 kPa, the oxygen controller 1 judges that the flow of the closing valve 2 is too large, the oxygen controller 1 sends a command to start the heat dissipation fan 4, and the high-temperature bleed air is prevented from entering the oxygen main machine 7;

[0040] 10) The closing valve 2 in the system is used as a bleed air switch of the oxygen supply device, and starts and stops according to the command of the oxygen controller 1;

[0041] 11) The heat dissipation fan 4 in the system is used as a key component of bleed air cooling, and starts and stops according to the command of the oxygen controller 1;

[0042] 12) The heat dissipation component 3 in the system is used as a bleed air flow limiting device to prevent excessive bleed air from affecting the engine power. According to the requirement of the molecular sieve oxygen supply, the bleed air quantity needs to be 60 kg / h, and the evaluation shows that the bleed air quantity does not consume more than 0.8% of the total power of the engine power. In order to avoid the bleed air quantity exceeding 60 kg / h, a bleed air flow limiting device needs to be designed;

[0043] 13) The filter 5 in the system is used to filter dust, water vapor and oil vapor contained in the engine bleed air, and to prevent the molecular sieve material in the oxygen generator 7 from being contaminated. The filter 5 is provided with a drain hole for draining water and oil.

[0044] 14) The temperature and pressure sensor 6 in the system has the properties of vibration resistance, shock resistance, acceleration resistance, and electromagnetic compatibility. It is used to collect the air temperature and pressure at the outlet of the heat dissipation component 3, transmit them to the oxygen generator controller 1, and determine whether the shut-off valve 2 and the heat dissipation component 3 are working properly.

[0045] 15) The oxygen generator 7 in the system separates oxygen and nitrogen from the introduced air by cyclically changing the adsorption and desorption pressure of the molecular sieve, and outputs mixed oxygen with different oxygen concentrations according to the changes in altitude.

[0046] 16) The oxygen concentration sensor 8 in the system is used to collect the oxygen concentration value at the outlet of the oxygen generator 7 and transmit it to the oxygen generator controller 1. The oxygen generator controller 1 compares the received oxygen concentration with the oxygen concentration limit value at the corresponding height and determines whether the oxygen generator 7 is working properly.

[0047] 17) The oxygen controller 1 in the system transmits the working information and fault information of the oxygen supply device to the electromechanical display 13 through the electromechanical computer 12, so as to provide the crew members with the real-time working status of the molecular sieve oxygen supply device.

Claims

1. A helicopter high-temperature bleed air oxygen generation control device, characterized in that, The system includes an engine bleed air passage (14), the outlet of which is connected to the inlet of a heat dissipation assembly (3), the outlet of which is connected to the inlet of an oxygen generator (7) via a bleed air pipe (10), and the outlet of the oxygen generator (7) is connected to an oxygen supply mask (9) via an oxygen supply pipe (11). A shut-off valve (2) is provided on the engine bleed air passage (14). A filter (5) and a temperature and pressure sensor (6) are provided at the outlet of the heat dissipation assembly (3). The shut-off valve (2) and the temperature and pressure sensor (6) are both connected to the oxygen generator controller (1). When the molecular sieve oxygen supply device is working normally, the temperature and pressure sensor (6) collects the air temperature and pressure at the outlet of the heat dissipation component (3) in real time and transmits the collected temperature and pressure values ​​to the oxygen generator controller (1). The oxygen generator controller (1) compares the collected temperature and pressure values ​​with the preset temperature and pressure limits to determine the working status of the heat dissipation fan (4) of the heat dissipation component (3): when the collected temperature and pressure values ​​are greater than the preset temperature and pressure limits, the heat dissipation fan (4) is determined to be faulty and the shut-off valve (2) is immediately closed. When the helicopter is flying normally and the molecular sieve oxygen supply device is not working, a small amount of high-temperature bleed air from the engine will flow through the shut-off valve (2) to the back-end oxygen generator. At this time, the oxygen generator controller (1) and the temperature and pressure sensor (6) are still in working state, and the cooling fan (4) is in standby state. The temperature and pressure sensor (6) collects the air temperature and pressure at the outlet of the heat dissipation component (3) in real time and transmits the collected temperature and pressure values ​​to the oxygen generator controller (1). The oxygen generator controller (1) judges the working state of the cooling fan (4) by comparing it with the preset temperature and pressure limit values: when the collected temperature and pressure values ​​are greater than the preset temperature and pressure limit values, it is determined to be over-temperature or over-pressure, and the cooling fan is started immediately.

2. The helicopter high-temperature bleed air oxygen generation control device according to claim 1, characterized in that, The oxygen generator (7) is equipped with an oxygen concentration sensor (8) at its outlet.

3. The helicopter high-temperature bleed air oxygen generation control device according to claim 1, characterized in that, The oxygen generator controller (1) is connected to the host computer (12).

4. The helicopter high-temperature bleed air oxygen generation control device according to claim 1, characterized in that, The host computer (12) is connected to the electromechanical display (13).

5. The helicopter high-temperature bleed air oxygen generation control device according to claim 1, characterized in that, Before the helicopter molecular sieve oxygen supply device is in normal operation, the cooling fan (4) is started first, and the shut-off valve (2) is opened after 3 seconds; when the molecular sieve oxygen supply device is shut down, the oxygen controller (1) closes the shut-off valve (2) first, and then shuts off the cooling fan (4) after 3 seconds.

6. The helicopter high-temperature bleed air oxygen generation control device according to claim 1, characterized in that, The oxygen generator controller (1) receives the oxygen concentration value at the outlet of the oxygen generator (7) collected by the oxygen concentration sensor (8), compares the collected oxygen concentration value with the preset oxygen concentration limit value, and determines the working status of the oxygen generator (7).

7. The helicopter high-temperature bleed air oxygen generation control device according to claim 1, characterized in that, The oxygen controller (1) transmits the working information and fault information of the oxygen supply device to the electromechanical display (13) through the host computer (12) to provide the crew members with the real-time working status of the molecular sieve oxygen supply device.

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