CN112596565A - Environmental control system engine bleed air analog system - Google Patents
Environmental control system engine bleed air analog system Download PDFInfo
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- CN112596565A CN112596565A CN202011501957.6A CN202011501957A CN112596565A CN 112596565 A CN112596565 A CN 112596565A CN 202011501957 A CN202011501957 A CN 202011501957A CN 112596565 A CN112596565 A CN 112596565A
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- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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Abstract
The invention belongs to the technical field of design of an aircraft environmental control system, and discloses an engine bleed air simulation system of the environmental control system. The method comprises the following steps: the device comprises a pressure pre-adjusting unit, a heating unit and a bleed air pressure adjusting unit; the idea of rapid mixing of a normal-temperature air circuit/heat circuit is adopted to realize rapid temperature change; the controllable silicon temperature control system controls the outlet temperature of the heater at a constant temperature, keeps energy storage continuously and reduces the influence of self heat capacity and pipeline heat capacity; the evacuation control is added at the outlet of the heater, so that the dry burning of the heater is avoided; the pressure pre-adjustment is added at the front end of the heater, the capacity of the rear end is always ensured to have enough pressure, the adjusting valve is arranged at the front end of the air-entraining inlet to adjust the pressure, and the filtering effect caused by the large capacity of the front end is reduced. The temperature and the pressure are independently controlled, and the coupling effect of the temperature and the pressure is eliminated.
Description
Technical Field
The invention belongs to the technical field of design of an aircraft environmental control system, and particularly relates to an engine bleed air simulation system of the environmental control system.
Background
The environmental control system engine bleed air analog system belongs to the field of environmental simulation and control, is mainly used for ground analog test of an aircraft environmental control system, can realize rapid adjustment of bleed air temperature, pressure and flow, and performs rapid temperature rise and drop, pressure rise and drop and full flight envelope dynamic analog test of the environmental control system. Under the condition that the states of engines of an airplane take off, make a great maneuver and the like change rapidly, the pressure and the temperature of bleed air change rapidly, so that the comfort is influenced, and the ear pressing is caused if the comfort is serious, so that the dynamic control optimization needs to be carried out on an environment control system, and the bleed air simulation system of an environment control test bed needs to have corresponding dynamic simulation capability for verification and examination.
Disclosure of Invention
The purpose of the invention is as follows: an environmental control system engine bleed air simulation system is provided.
The technical scheme of the invention is as follows:
an environmental control system engine bleed air analog system includes: the device comprises a pressure pre-adjusting unit, a heating unit and a bleed air pressure adjusting unit;
the input end of the pressure pre-adjusting unit is connected with a compressed air source and is used for pre-adjusting the pressure of the compressed air source;
the input end of the heating unit is connected with the output end of the pressure pre-adjusting unit; the heating unit is used for heating the compressed air source with the pre-adjusted pressure;
the input end of the bleed air pressure adjusting unit is connected with the output end of the heating unit, the output end of the bleed air pressure adjusting unit is connected with the input end of the loop control system, and the bleed air pressure adjusting unit is used for adjusting the air supply pressure of the loop control system.
Further, the pressure preconditioning unit comprises: the system comprises a pressure pre-adjustment controller, a first pressure sensor and a first pressure adjusting valve;
the first pressure regulating valve is arranged between the compressed air source and the heating unit, the first pressure sensor is used for detecting the air pressure at the input end of the heating unit and transmitting the air pressure data at the input end of the heating unit to the pressure pre-regulating controller, and the pressure pre-regulating controller regulates the opening degree of the first pressure regulating valve according to the air pressure data.
The pressure pre-adjustment is added at the front end of the heater, the capacity of the rear end is always ensured to have enough pressure, and the adjusting valve is arranged at the front end of the bleed air inlet to adjust the pressure, so that the filtering effect of the bleed air with large volume at the front end is reduced.
Further, the heating unit includes: a heater, a temperature sensor and a temperature controller;
the heater is arranged between the pressure pre-adjusting unit and the bleed air pressure adjusting unit, the temperature sensor is used for detecting the air temperature at the output end of the heater and transmitting temperature data to the temperature controller, and the temperature controller is used for adjusting the heating power of the heater according to the temperature data.
The heating unit adopts a temperature control system to control the outlet temperature of the heater at a constant temperature, so that the energy storage is continuously kept, and the influence of the self heat capacity and the pipeline heat capacity is reduced
Further, the bleed air pressure adjusting unit includes: the bleed air pressure adjusting controller, the second pressure sensor and the second pressure adjusting valve;
the second pressure regulating valve is arranged between the heating unit and the environment control system;
the second pressure sensor is used for detecting the air pressure at the input end of the environment control system and transmitting air pressure data to the air-entraining pressure adjusting unit;
and the air-entraining pressure adjusting unit adjusts the opening degree of the second pressure adjusting valve according to the air pressure data so as to adjust the air supply pressure of the regulating and controlling system.
Further, the bleed air pressure adjusting unit further includes: a first exhaust valve;
the first exhaust valve is connected to the input end of the second pressure regulating valve;
and the air-entraining pressure adjusting unit also adjusts the first exhaust valve to exhaust redundant air to the external environment according to the air pressure data, so that the temperature and pressure coupling of the air is avoided.
Further, the system further comprises: a bleed air temperature adjusting unit;
the bleed air temperature adjustment unit includes: the bleed air temperature adjusting controller, the second temperature sensor, the normal temperature flow adjusting valve and the high temperature flow adjusting valve;
the high-temperature flow regulating valve is arranged at the output end of the heater;
the input end of the normal-temperature flow regulating valve is connected with the input end of the heater, and the output end of the normal-temperature flow regulating valve is connected with the output end of the high-temperature flow regulating valve;
the second temperature sensor is arranged at the input end of the bleed air pressure adjusting unit; the air temperature control system is used for detecting the air temperature at the input end of the bleed air pressure regulating unit and transmitting the air temperature data at the input end of the bleed air pressure regulating unit to the bleed air temperature regulating controller;
and the air-entraining temperature adjusting controller controls the opening of the normal-temperature flow adjusting valve and the opening of the high-temperature flow adjusting valve according to air temperature data at the input end of the air-entraining pressure adjusting unit.
The idea of rapid mixing of the normal-temperature air circuit/hot circuit realizes rapid temperature change.
The temperature and the pressure are controlled independently and excess air is evacuated in the bleed air pressure regulating unit, eliminating the temperature and pressure coupling effect.
Further, the system further comprises: a heater flow protection unit;
the heater flow protection unit includes: the heater flow protection controller, the second exhaust valve and the flow sensor;
the flow sensor is arranged at the input end of the heater and used for detecting the air input quantity of the heater; and transmitting the air input data to a heater flow protection controller;
the second exhaust valve is arranged between the heater and the high-temperature flow regulating valve; the second exhaust valve is used for discharging redundant high-temperature air to the outside when the opening of the high-temperature flow regulating valve is reduced;
the heater flow protection controller is used for controlling the opening of the second exhaust valve according to the air input quantity of the heater.
The evacuation control is added at the outlet of the heater, so that the air supply quantity of the heater is ensured to be in a safe range, and the dry burning of the heater is avoided;
further, the system further comprises: a humidity adjustment unit; the humidity adjusting unit is arranged between the heating unit and the bleed air pressure adjusting unit.
Compared with the existing aviation power supply system, the aviation power supply system has the following advantages:
1. the mixing temperature regulation speed is high, the thermal inertia is small, the temperature response is fast, the thermal inertia of the heater is reduced through evacuation energy storage of a thermal circuit, the bleed air temperature is required to be quickly regulated, the mixing proportion is quickly changed by only controlling quick opening and closing of a normal-temperature bypass valve and a thermal circuit evacuation valve, and the temperature is also quickly changed;
2. the bleed air pressure can be controlled by the quick opening and closing of a system inlet pressure regulating valve and an inlet emptying valve, the pressure regulation can adopt the constant opening degree of the emptying valve, and the inlet valve is regulated to regulate the pressure; the pressure can also be adjusted by adjusting the emptying valve through the fixed opening degree of the inlet valve. Through controlling entry governing valve and entry exhaust-off valve simultaneously, can realize the quick sudden change of pressure, satisfy various pressure change operating mode test demands, improve the scalability of system.
Drawings
FIG. 1 is a schematic block diagram of an environmental control system engine bleed air simulation system;
the system comprises QF1, a compressed air source pressure regulating valve, QF2, a normal-temperature bypass regulating valve, QF3, a hot-circuit flow regulating valve, QF4, a hot-circuit flow emptying valve, QF5, an inlet pressure regulating valve, QF6, an inlet emptying regulating valve, an H1-1 pipeline type air heater, an H2-2 pipeline type air heater, an H3-3 pipeline type air heater, P1, pre-adjusted pressure, P2, an environment-controlled system inlet pressure, a T1-1 heater outlet temperature sensor, a T2-2 heater outlet temperature sensor, a T3-3 heater outlet temperature sensor, a T4, an environment-controlled system inlet temperature sensor and G1, wherein the flow of the heater is controlled by the pressure regulating valve, the inlet pressure.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, and all other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.
As shown in fig. 1, an environmental control system engine bleed air simulation system includes: the device comprises a pressure pre-adjusting unit, a heating unit and a bleed air pressure adjusting unit;
the pressure preconditioning unit comprises: the system comprises a pressure pre-adjustment controller, a first pressure sensor and a first pressure adjusting valve; the pressure regulating valve is arranged between the compressed air source and the heating unit, the pressure sensor is used for detecting the air pressure at the input end of the heating unit and transmitting the air pressure data at the input end of the heating unit to the pressure pre-regulating controller, and the pressure pre-regulating controller regulates the opening degree of the pressure regulating valve according to the air pressure data.
The pressure pre-adjustment is added at the front end of the heater, the capacity of the rear end is always ensured to have enough pressure, and the adjusting valve is arranged at the front end of the bleed air inlet to adjust the pressure, so that the filtering effect of the bleed air with large volume at the front end is reduced.
The heating unit includes: a heater, a temperature sensor and a temperature controller; the heater is arranged between the pressure pre-adjusting unit and the bleed air pressure adjusting unit, the temperature sensor is used for detecting the air temperature at the output end of the heater and transmitting the temperature data to the temperature controller, and the temperature controller is used for adjusting the heating power of the heater according to the temperature data.
The heating unit adopts a temperature control system to control the outlet temperature of the heater at a constant temperature, so that energy storage is continuously kept, and the influence of self heat capacity and pipeline heat capacity is reduced;
the bleed air pressure regulating unit includes: the bleed air pressure adjusting controller, the second pressure sensor and the second pressure adjusting valve; the second pressure regulating valve is arranged between the heating unit and the environment control system; the second pressure sensor is used for detecting the air pressure at the input end of the environment control system and transmitting air pressure data to the air-entraining pressure adjusting unit;
and the air-entraining pressure adjusting unit adjusts the opening degree of the second pressure adjusting valve according to the air pressure data so as to adjust the air supply pressure of the regulating and controlling system.
The bleed air pressure regulating unit further comprises: a first exhaust valve; the first exhaust valve is connected with the input end of the second pressure regulating valve; the bleed air pressure regulating unit also regulates the first exhaust valve to exhaust redundant gas to the external environment according to the air pressure data, and avoids the temperature and pressure coupling of air.
The system further comprises: a bleed air temperature adjusting unit; the bleed air temperature adjustment unit includes: the bleed air temperature adjusting controller, the second temperature sensor, the normal temperature flow adjusting valve and the high temperature flow adjusting valve; the high-temperature flow regulating valve is arranged at the output end of the heater; the input end of the normal temperature flow regulating valve is connected with the input end of the heater, and the output end of the normal temperature flow regulating valve is connected with the output end of the high temperature flow regulating valve; the second temperature sensor is arranged at the input end of the bleed air pressure adjusting unit; the air temperature control system is used for detecting the air temperature at the input end of the bleed air pressure regulating unit and transmitting the air temperature data at the input end of the bleed air pressure regulating unit to the bleed air temperature regulating controller; and the bleed air temperature adjusting controller controls the opening of the normal-temperature flow adjusting valve and the opening of the high-temperature flow adjusting valve according to air temperature data at the input end of the bleed air pressure adjusting unit.
The idea of rapid mixing of the normal-temperature air circuit/hot circuit realizes rapid temperature change.
The temperature and the pressure are controlled independently and excess air is evacuated in the bleed air pressure regulating unit, eliminating the temperature and pressure coupling effect.
The system further comprises: a heater flow protection unit; the heater flow protection unit includes: the heater flow protection controller, the second exhaust valve and the flow sensor; the flow sensor is arranged at the input end of the heater and used for detecting the air input quantity of the heater; and transmitting the air input data to a heater flow protection controller; the second exhaust valve is arranged between the heater and the high-temperature flow regulating valve; the second exhaust valve is used for discharging redundant high-temperature air to the outside when the opening of the high-temperature flow regulating valve is reduced; the heater flow protection controller is used for controlling the opening degree of the second exhaust valve according to the air input quantity of the heater.
The evacuation control is added at the outlet of the heater, so that the air supply quantity of the heater is ensured to be in a safe range, and the dry burning of the heater is avoided;
the system further comprises: a humidity adjustment unit; the humidity adjustment unit is arranged between the heating unit and the bleed air pressure adjustment unit.
The working principle is as follows:
1) the air supply pressure is pre-stabilized by the regulating valve QF1, a stable base pressure P1 is established, and the influence of air supply pressure change on inlet pressure regulation of the back-end system is reduced.
2) T1, T2 and T3 are controlled at constant temperature by controlling the pipeline heaters (H1, H2 and H3) through a silicon controlled temperature control system to serve as hot path air for cold and hot mixing.
3) The inlet temperature T4 of the environmental control system is controlled by the combination of regulating valves QF2 and QF3, when the temperature of the bleed air rises, a large hot-circuit flow regulating valve QF3 is opened, and a small normal-temperature bypass regulating valve QF2 is closed; when the temperature of the bleed air is reduced, the thermal path flow regulating valve QF3 is closed, and the normal temperature bypass regulating valve QF2 is opened.
4) The flow G1 of the heater is ensured to be in a safe range through the regulating valve QF4, and the heater is prevented from being dried due to short flow. When QF3 is closed, resulting in a decrease in heater flow, the hot-circuit flow drain valve QF4 is opened.
5) The combination of regulating valves QF5 and QF6 realizes the regulation of the inlet pressure P2 of the environmental control system. When the bleed air pressure rises, opening a large inlet pressure regulating valve QF5, and closing a small inlet emptying regulating valve QF 6; when the bleed air pressure is reduced, the inlet pressure regulating valve QF5 is closed and the inlet emptying regulating valve QF6 is opened.
Claims (8)
1. The utility model provides an environmental control system engine bleed air analog system which characterized in that: the system comprises: the device comprises a pressure pre-adjusting unit, a heating unit and a bleed air pressure adjusting unit;
the input end of the pressure pre-adjusting unit is connected with a compressed air source and is used for pre-adjusting the pressure of the compressed air source;
the input end of the heating unit is connected with the output end of the pressure pre-adjusting unit; the heating unit is used for heating the compressed air source with the pre-adjusted pressure;
the input end of the bleed air pressure adjusting unit is connected with the output end of the heating unit, the output end of the bleed air pressure adjusting unit is connected with the input end of the loop control system, and the bleed air pressure adjusting unit is used for adjusting the air supply pressure of the loop control system.
2. The environmental control system engine bleed air simulation system of claim 1, wherein: the pressure preconditioning unit comprises: the system comprises a pressure pre-adjustment controller, a first pressure sensor and a first pressure adjusting valve;
the first pressure regulating valve is arranged between the compressed air source and the heating unit, the first pressure sensor is used for detecting the air pressure at the input end of the heating unit and transmitting the air pressure data at the input end of the heating unit to the pressure pre-regulating controller, and the pressure pre-regulating controller regulates the opening degree of the first pressure regulating valve according to the air pressure data.
3. The environmental control system engine bleed air simulation system of claim 1, wherein: the heating unit includes: a heater, a temperature sensor and a temperature controller;
the heater is arranged between the pressure pre-adjusting unit and the bleed air pressure adjusting unit, the temperature sensor is used for detecting the air temperature at the output end of the heater and transmitting temperature data to the temperature controller, and the temperature controller is used for adjusting the heating power of the heater according to the temperature data.
4. The environmental control system engine bleed air simulation system of claim 1, wherein: the bleed air pressure adjusting unit includes: the bleed air pressure adjusting controller, the second pressure sensor and the second pressure adjusting valve;
the second pressure regulating valve is arranged between the heating unit and the environment control system;
the second pressure sensor is used for detecting the air pressure at the input end of the environment control system and transmitting air pressure data to the air-entraining pressure adjusting unit;
and the air-entraining pressure adjusting unit adjusts the opening degree of the second pressure adjusting valve according to the air pressure data so as to adjust the air supply pressure of the regulating and controlling system.
5. The environmental control system engine bleed air simulation system of claim 4, wherein: the bleed air pressure regulating unit further comprises: a first exhaust valve;
the first exhaust valve is connected to the input end of the second pressure regulating valve;
and the air-entraining pressure adjusting unit also adjusts the first exhaust valve to exhaust redundant gas to the external environment according to the air pressure data so as to avoid the temperature and pressure coupling of the air.
6. The environmental control system engine bleed air simulation system of claim 3, wherein: the system further comprises: a bleed air temperature adjusting unit;
the bleed air temperature adjustment unit includes: the bleed air temperature adjusting controller, the second temperature sensor, the normal temperature flow adjusting valve and the high temperature flow adjusting valve;
the high-temperature flow regulating valve is arranged at the output end of the heater;
the input end of the normal-temperature flow regulating valve is connected with the input end of the heater, and the output end of the normal-temperature flow regulating valve is connected with the output end of the high-temperature flow regulating valve;
the second temperature sensor is arranged at the input end of the bleed air pressure adjusting unit; the air temperature control system is used for detecting the air temperature at the input end of the bleed air pressure regulating unit and transmitting the air temperature data at the input end of the bleed air pressure regulating unit to the bleed air temperature regulating controller;
and the air-entraining temperature adjusting controller controls the opening of the normal-temperature flow adjusting valve and the opening of the high-temperature flow adjusting valve according to air temperature data at the input end of the air-entraining pressure adjusting unit.
7. The environmental control system engine bleed air simulation system according to claim/6, characterized in that: the system further comprises: a heater flow protection unit;
the heater flow protection unit includes: the heater flow protection controller, the second exhaust valve and the flow sensor;
the flow sensor is arranged at the input end of the heater and used for detecting the air input quantity of the heater; and transmitting the air input data to a heater flow protection controller;
the second exhaust valve is arranged between the heater and the high-temperature flow regulating valve; the second exhaust valve is used for discharging redundant high-temperature air to the outside when the opening of the high-temperature flow regulating valve is reduced;
the heater flow protection controller is used for controlling the opening of the second exhaust valve according to the air input quantity of the heater.
8. The environmental control system engine bleed air simulation system of claim 1, wherein: the system further comprises: a humidity adjustment unit; the humidity adjusting unit is arranged between the heating unit and the bleed air pressure adjusting unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011501957.6A CN112596565A (en) | 2020-12-17 | 2020-12-17 | Environmental control system engine bleed air analog system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011501957.6A CN112596565A (en) | 2020-12-17 | 2020-12-17 | Environmental control system engine bleed air analog system |
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| CN112596565A true CN112596565A (en) | 2021-04-02 |
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| CN202011501957.6A Pending CN112596565A (en) | 2020-12-17 | 2020-12-17 | Environmental control system engine bleed air analog system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4802621A (en) * | 1986-09-25 | 1989-02-07 | Consolidated Controls Corporation | Thermal modulating control valve |
| CN104360702A (en) * | 2014-10-30 | 2015-02-18 | 北京航空航天大学 | System for dynamically testing aviation thermal power and method for dynamically controlling temperature and pressure environments |
| CN104460790A (en) * | 2014-12-30 | 2015-03-25 | 北京航空航天大学 | Dynamic aviation thermal power testing system and rapid temperature and pressure control method |
| CN107290166A (en) * | 2017-07-31 | 2017-10-24 | 中国商用飞机有限责任公司 | Test system and test method for simulating rapid change of fluid temperature and/or pressure |
| CN209290726U (en) * | 2018-11-30 | 2019-08-23 | 中国航空工业集团公司沈阳飞机设计研究所 | Engine bleed Pressure behaviour simulator |
-
2020
- 2020-12-17 CN CN202011501957.6A patent/CN112596565A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4802621A (en) * | 1986-09-25 | 1989-02-07 | Consolidated Controls Corporation | Thermal modulating control valve |
| CN104360702A (en) * | 2014-10-30 | 2015-02-18 | 北京航空航天大学 | System for dynamically testing aviation thermal power and method for dynamically controlling temperature and pressure environments |
| CN104460790A (en) * | 2014-12-30 | 2015-03-25 | 北京航空航天大学 | Dynamic aviation thermal power testing system and rapid temperature and pressure control method |
| CN107290166A (en) * | 2017-07-31 | 2017-10-24 | 中国商用飞机有限责任公司 | Test system and test method for simulating rapid change of fluid temperature and/or pressure |
| CN209290726U (en) * | 2018-11-30 | 2019-08-23 | 中国航空工业集团公司沈阳飞机设计研究所 | Engine bleed Pressure behaviour simulator |
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Application publication date: 20210402 |