阅读说明：本技术 一种飞机环控系统试验引气管道加湿系统 (Experimental bleed air pipeline humidification system of aircraft environmental control system ) 是由 张贤锦 马春香 陈伟 张立圣 商辉 焦奇峰 吴军 周魏雄 范钟 张珍珍 于 2020-06-17 设计创作，主要内容包括：本发明提供一种飞机环控系统试验引气管道加湿系统,主要包括恒压水泵(1)、减压稳压阀(3)、流量调节阀(4)、水流量计(6)、喷嘴(8)、空气流量计(9)、控制模块(10)和压力传感器(11),恒压水泵(1)将水源的压力加压,尔后减压稳压阀(3)进行减压及稳压,流量调节阀(4)调节水流至所需要的流量,并最后通过喷嘴(8)将水雾化喷入高温高压管道；恒压水泵(1)的出口设置了压力传感器(11),流量调节阀(4)出口设有一个水流量计(6),空气管道中设有空气流量计(9),控制模块(10)综合上述三者的输入信号,以控制流量调节阀(4)的开度。所设计的飞机环控系统试验引气管道加湿系统,可以满足试验引气高压高湿度模拟要求。(The invention provides a test bleed air pipeline humidification system of an aircraft environmental control system, which mainly comprises a constant pressure water pump (1), a pressure reducing and stabilizing valve (3), a flow regulating valve (4), a water flowmeter (6), a nozzle (8), an air flowmeter (9), a control module (10) and a pressure sensor (11), wherein the constant pressure water pump (1) pressurizes the pressure of a water source, the pressure reducing and stabilizing valve (3) then reduces and stabilizes the pressure, the flow regulating valve (4) regulates the water flow to the required flow, and finally, the water is atomized and sprayed into a high-temperature and high-pressure pipeline through the nozzle (8); the outlet of the constant pressure water pump (1) is provided with a pressure sensor (11), the outlet of the flow regulating valve (4) is provided with a water flow meter (6), an air flow meter (9) is arranged in an air pipeline, and a control module (10) integrates input signals of the three to control the opening degree of the flow regulating valve (4). The designed humidification system for the test bleed air pipeline of the aircraft environmental control system can meet the simulation requirements of high pressure and high humidity of test bleed air.)

1. The utility model provides an experimental bleed air pipeline humidification system of aircraft environmental control system which characterized in that: the system mainly comprises a constant-pressure water pump (1), a pressure reducing and stabilizing valve (3), a flow regulating valve (4), a water flow meter (6), a nozzle (8), an air flow meter (9), a control module (10) and a pressure sensor (11); the constant pressure water pump (1) pressurizes the pressure of the water source to a value higher than the simulated engine priming pressure of the environmental control system, and the pressurized water source is subjected to certain pressure reduction and pressure stabilization by the pressure reduction and stabilization valve (3); the water source after pressure stabilization passes through a flow regulating valve (4) to regulate the water flow to the flow required by the test of an environmental control system; the regulated water flow finally atomizes water through a nozzle (8) and sprays the atomized water into a high-temperature high-pressure pipeline, and liquid water is vaporized by means of high-temperature gas in the pipeline; the pressure sensor (11) is arranged at the outlet of the constant pressure water pump (1), the pressure sensor (11) is connected with the control module (10) in a signal mode, the outlet pressure of the constant pressure water pump (1) can be monitored in real time, and when the outlet pressure of the constant pressure water pump (1) is ultrahigh or ultralow, and normal operation of the system cannot be guaranteed, alarm information is sent to an operator; the output end of the flow regulating valve (4) is connected with a water flow meter (6) in series, a measuring signal of the water flow meter (6) is connected into the control module (10), an air flow meter (9) is connected into the air pipeline in series, an air flow signal is connected into the control module (10), the control module (10) integrates input signals of the pressure sensor (11), the water flow meter (6) and the air flow meter (9), and the opening degree of the flow regulating valve (4) is controlled to achieve a preset output water flow value and achieve the purpose of moderate control.

2. The experimental bleed air duct humidification system of an aircraft environmental control system of claim 1, wherein: and a one-way valve (7) is connected between the nozzle (8) and the water flow meter in series to prevent the gas in the high-temperature high-pressure pipeline from flowing back to the humidifying system due to faults.

3. The experimental bleed air duct humidification system of an aircraft environmental control system of claim 1, wherein: the outlet of the constant pressure water pump (1) is provided with an energy accumulator (2) and a safety valve (5), when the pressure fluctuation of the outlet of the constant pressure water pump (1) is large, the energy accumulator (2) can absorb energy when the pressure is too high, and supplement energy when the pressure is too low, so that the stable flow output of a humidification system is guaranteed; when the outlet pressure of the constant pressure water pump (1) exceeds a set early warning value, the safety valve (5) is automatically opened to release pressure, and the safe operation of the system is guaranteed.

4. The experimental bleed air duct humidification system of an aircraft environmental control system of claim 1, wherein: the control module (10) is provided with a manual control mode and an automatic control mode, and when the automatic control mode is selected, the control module (10) compares the set index value with the comprehensive calculated value of the input signals of the pressure sensor (11), the water flowmeter (6) and the air flowmeter (9) to automatically control the opening of the flow regulating valve (4); when the manual control mode is selected, the control module (10) does not work, and the opening degree of the flow regulating valve (4) needs to be manually regulated.

Technical Field

The invention belongs to the field of flight simulation ground test design, and particularly relates to a test air-entraining pipeline humidifying system for an aircraft environment control system.

Background

In the ground simulation test process of the airplane environmental control system, high-temperature and high-pressure air bleeding of an engine needs to be simulated. With the improvement of the performance of modern airplanes and engines, the parameter index of the environment control system for bleed air from the engines is improved, the bleed air pressure can reach more than 1.2MPa, and the simulation humidity exceeds 40g/kg & dar. The traditional environmental control system test bleed air adopts a steam humidification method, but if the test bleed air is realized by adopting a steam humidification technology, the cost is very high and the danger degree is high due to the high pressure of 1.2MPa and the high humidity parameter index requirement of 40 g/kg-dar. Therefore, the environmental control system test induced air high humidity simulation is not suitable for adopting a steam humidifying method.

If the high-pressure atomization humidification method is adopted, when the water flow is lower than 10Kg/h under certain working conditions, the stability and the accurate control of the small water flow are important technical difficulties, and if the problem can be solved, the high-pressure atomization humidification method is very suitable for experimental bleed air of an environmental control system.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the humidification system for the test bleed air pipeline of the aircraft environmental control system, which can realize safe and stable test bleed air pipeline atomization and humidification of the aircraft environmental control system with an automatic control function.

In order to solve the technical problem, the test bleed air pipeline humidification system of the aircraft environmental control system mainly comprises a constant-pressure water pump, a pressure reducing and stabilizing valve, a flow regulating valve, a water flow meter, a nozzle, an air flow meter, a control module, a pressure sensor and the like.

The constant pressure water pump pressurizes the pressure of the water source to a value higher than the simulated engine priming pressure of the environmental control system, and the pressure reduction and stabilization valve performs certain pressure reduction and stabilization on the pressurized water source to prevent the fluctuation of the water pressure of the system caused by the instability of the outlet pressure of the constant pressure water pump;

the water source after pressure stabilization passes through a flow regulating valve to regulate the water flow to the flow required by the test of the environmental control system;

the regulated water flow is atomized and sprayed into the high-temperature high-pressure pipeline through the nozzle, and liquid water is vaporized by means of high-temperature gas in the pipeline;

the outlet of the constant-pressure water pump is provided with the pressure sensor, and the signal of the pressure sensor is connected to the control module, so that the outlet pressure of the water pump can be monitored in real time, and when the outlet pressure of the water pump is ultrahigh or ultralow and the normal operation of the system cannot be guaranteed, warning information can be sent to an operator;

the output end of the flow regulating valve is connected with a water flow meter in series, a measuring signal of the water flow meter is connected into the control module, an air flow meter and an air flow signal are connected into the control module in series in an air pipeline, a pressure sensor is arranged at the outlet of the constant-pressure water pump, a sensor signal is connected into the control module, and the control module integrates input signals of the pressure sensor, the water flow meter and the air flow meter and controls the opening of the flow regulating valve so as to realize a preset output water flow value and achieve the purpose of proper control.

Furthermore, in order to prevent the gas in the high-temperature and high-pressure pipeline from flowing back to the humidifying system due to faults, a check valve is arranged at the front end of the nozzle.

Furthermore, an energy accumulator and a safety valve are arranged at the outlet of the constant-pressure water pump, when the pressure fluctuation at the outlet of the water pump is large, the energy accumulator can absorb energy when the pressure is too high, and can supplement energy when the pressure is too low, so that the stable flow output by the humidification system is guaranteed; when the outlet pressure of the water pump exceeds a set early warning value, the safety valve is automatically opened to release pressure, and the safe operation of the system is guaranteed.

Furthermore, a manual control mode and an automatic control mode are arranged on the control module, and when the automatic control mode is selected, the control module compares the set index value with the comprehensive calculated value of the input signals of the pressure sensor, the water flow meter and the air flow meter to automatically control the opening of the flow regulating valve; when the manual control mode is selected, the control module does not work, and the opening of the flow regulating valve needs to be manually regulated.

In the technical scheme, the designed aircraft environmental control system test bleed air pipeline humidification system can solve the problem that the traditional steam humidification method cannot meet the test bleed air high-pressure high-humidity simulation of the environmental control system. By the high-pressure atomization humidification system, the stability of atomization humidification is improved, and humidification control is intelligentized.

Drawings

Fig. 1 is a schematic diagram of the connection of a test bleed air duct humidifying system of an aircraft environmental control system of the invention.

In fig. 1: 1. the device comprises a constant-pressure water pump, 2, an energy accumulator, 3, a pressure reducing and stabilizing valve, 4, a flow regulating valve, 5, a safety valve, 6, a water flow meter, 7, a one-way valve, 8, a nozzle, 9, an air flow meter, 10, a control module, 11 and a pressure sensor.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to fig. 1.

As shown in figure 1, after water of a water source is pressurized by a constant pressure water pump (1), the pressure of the water source is pressurized by the constant pressure water pump (1) to a value higher than the simulated engine priming pressure of an environmental control system, the water flows through a pressure reducing and stabilizing valve (3) through the safety control of an energy accumulator (2) and a safety valve (5), the pressurized water source is subjected to certain pressure reduction and pressure stabilization by the pressure reducing and stabilizing valve (3), and the fluctuation of the water pressure of the system caused by the instability of the outlet pressure of the constant pressure water pump (1) is prevented.

The water source after the pressure stabilization passes through the flow regulating valve (4), the water flow is regulated to the flow required by the environment control system test, and finally, the water is atomized and sprayed into the high-temperature high-pressure pipeline through the nozzle (8), and the liquid water is vaporized by means of high-temperature gas in the pipeline.

In order to prevent the gas in the high-temperature and high-pressure pipeline from flowing back to the humidifying system due to faults, a check valve (7) is arranged at the front end of the nozzle (8).

The outlet of the constant pressure water pump (1) is also provided with a pressure sensor (11), and a sensor signal is connected into the control module (10), so that the outlet pressure of the constant pressure water pump (1) can be monitored in real time, and when the outlet pressure of the constant pressure water pump (1) is ultrahigh or ultralow, the normal operation of the system can not be guaranteed, alarm information can be sent to an operator.

The system has two control modes, manual and automatic, and the control modes are switched in the control module (10). The opening degree of the flow regulating valve (4) can be manually regulated, and the water flow of the humidification system is regulated to a required value; the moisture content value required by the environmental control system bleed air can be set in the control module (10), the control module (10) reads the water adding flow meter (6) and the high-temperature high-pressure air flow meter (9), and the current actual moisture content value of the environmental control system bleed air is calculated according to a set formula. By comparing the set value and the actual value of the moisture content, a control signal is output, the opening degree of the flow regulating valve (4) is regulated, a control closed loop is formed, and the actual value of the moisture content is automatically regulated to be consistent with the set value.