CN104792536A - Pre-installation performance test method for air circulation unit of airplane - Google Patents
Pre-installation performance test method for air circulation unit of airplane Download PDFInfo
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- CN104792536A CN104792536A CN201510177923.9A CN201510177923A CN104792536A CN 104792536 A CN104792536 A CN 104792536A CN 201510177923 A CN201510177923 A CN 201510177923A CN 104792536 A CN104792536 A CN 104792536A
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Abstract
The invention belongs to test techniques and relates to a pre-installation performance test method for an air circulation unit of an airplane. The method includes the steps of subjecting a cold side air inlet and a hot side air outlet to resistance influence-free testing; subjecting the cold side air inlet to resistance influence testing; subjecting both the cold side air inlet and the hot side air outlet to resistance influence testing; performing engine air-entraining pressure influence testing; subjecting a turbine outlet to back pressure influence testing. The method has the advantages that the air circulation unit can be subjected to simulation testing before installation, faults can be discovered and removed in advance, the air circulation unit is avoided failing after installation, and the delivery progress of the air plane is ensured.
Description
Technical field
The invention belongs to measuring technology, relate to the front performance test methods of aircraft air cycle machine installation.
Background technology
Aircraft air cycle machine is installed laggard luggage machine testing inspection, some air cycle machine finds after detecting: on machine, the air output at air cycle machine nozzle place is little and temperature is too high, not having the effect of refrigeration, causing through repeatedly investigating to find the immediate cause that air-conditioning system nozzle air output is little, temperature is too high.Especially, after each system of aircraft assembles, find out and cause the reason of air-conditioning system refrigeration just more difficult, need air cycle machine to pull down inspection, delay the duration, had a strong impact on aircraft delivery progress.
Summary of the invention
The object of the invention is: propose the front performance test methods of a kind of aircraft air cycle machine installation, to carry out simulation test to air cycle machine before installation, find in advance and fix a breakdown, avoiding air cycle machine to break down after installation, ensureing the delivery progress of aircraft.
Technical scheme of the present invention is: performance test methods before the installation of aircraft air cycle machine, is characterized in that: the step of front performance test of carrying out installing is as follows:
1, assembling testing equipment: two-way engine bleed entrance 1 is communicated with two air intake openings of compound check valve 2 by the road respectively, the gas outlet of compound check valve 2 is communicated with the air intake opening of absolute pressure regulator 3 by the road, the gas outlet of absolute pressure regulator 3 is communicated with the air intake opening of Venturi tube 4 by the road, the gas outlet of Venturi tube 4 is communicated with the engine bleed air intake opening 6a of tested air cycle machine 6 by the road, at the air in of air cycle machine 6, cold limit filter screen 5 is installed, at the air out of air cycle machine 6, hot limit filter screen 9 is installed, first thermometer 7 and the first tensimeter 8 is installed at the air in place of air cycle machine 6, detect air themperature and the pressure at the air in place of air cycle machine 6, the gas outlet of air cycle machine 6 engine bleed is communicated with the air intake opening of throttling valve 12 by the road, the gas outlet of throttling valve 12 leads to air, pipeline between the gas outlet and throttling valve 12 of air cycle machine 6 engine bleed is installed the second thermometer 11 and the second tensimeter 10, the temperature signal output terminal being arranged on temperature sensor 14 on air cycle machine 6 internal engine bleed export pipeline is connected by the temperature signal input of wire with temperature controller 13, the control signal output terminal of temperature controller 13 is connected by the control signal input end of wire with the electronic on-off valve 6b on air cycle machine 6 internal engine bleed bypass line,
2 testing procedures:
2.1, cold limit air in and Re Bian air out non-resistance impact test:
2.1.1, the cold limit filter screen 5 of the cold limit air in of air cycle machine and the hot limit filter screen 9 of Re Bian air out are removed, regulate the pipe resistance pressure of separator outlet at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains design load 2 DEG C ± 2 DEG C, if air cycle machine turbine-exit temperature meets design load 2 DEG C ± 2 DEG C, then carry out following testing procedure; If air cycle machine turbine-exit temperature does not meet design load 2 DEG C ± 2 DEG C, then air cycle machine performance inconsistency lattice, test terminates;
2.1.2, observe the closedown degree of the inner hot passage valve 6b of air cycle machine, as hot passage valve 6b does not close completely, show that the refrigerating capacity of air cycle machine still has more than needed, proceed test below; As hot passage valve 6b closes completely, show that the refrigerating capacity of air cycle machine is not enough, air cycle machine performance inconsistency lattice, test terminates;
2.2, cold limit air in drag effects test:
2.2.1, the cold limit filter screen 5 of air cycle machine heat sink inlet is installed, regulate separator export pipeline resistance pressure at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains design load 2 DEG C ± 2 DEG C, if not in temperature range, record this turbine-exit temperature, analyze cold limit air in resistance to the impact of air cycle machine turbine-exit temperature, and contrast with measured turbine-exit temperature in step 2, if temperature is higher than 4 DEG C, illustrate that cold limit air in resistance can increase air conditioner outlet temperature; If temperature is lower than 0 DEG C, illustrate that cold limit air in resistance can reduce air conditioner outlet temperature;
2.2.2 observe the closedown degree of hot passage valve 6b, as hot passage valve 6b does not close completely, show that the refrigerating capacity of air cycle machine under the air in drag effects of cold limit still has more than needed; As hot passage valve 6b closes completely, show that air cycle machine is not enough in the refrigerating capacity of cold limit air in drag effects, test terminates;
2.3, cold limit air in and Re Bian air out all have drag effects to test:
2.3.1, hot limit air out is installed air filter screen 9 is installed, regulate separator export pipeline resistance pressure at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains design load 2 DEG C ± 2 DEG C, if not in temperature range, record this turbine-exit temperature, analyze cold limit air in and Re Bian air out all has resistance to the impact of air cycle machine turbine-exit temperature, and contrast with measured turbine-exit temperature in step 2 and step 3, if temperature is higher than 4 DEG C, illustrate that cold limit air in and Re Bian air out all have resistance can increase air conditioner outlet temperature, if temperature is lower than 0 DEG C, illustrate that cold limit air in and Re Bian air out all have resistance can reduce air conditioner outlet temperature,
2.3.2 observe the closedown degree of hot passage valve 6b, as hot passage valve 6b does not close completely, show that the refrigerating capacity of air cycle machine under cold limit air in and Re Bian air out all have drag effects still has more than needed; As hot passage valve 6b closes completely, show that the refrigerating capacity of air cycle machine under cold limit air in and Re Bian air out all have drag effects is not enough, test terminates;
2.4, engine bleed pressure influence test:
2.4.1 engine bleed pressure is regulated, when engine bleed pressure is down to below design point operating mode gradually, the inlet pressure reduction whether corresponding to top hole pressure of test turbine; Regulate separator export pipeline resistance pressure at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains 2 DEG C ± 2 DEG C, and if temperature is higher than 4 DEG C, illustrate that engine bleed force pressure reduces, air conditioner outlet temperature reduces; If temperature is lower than 0 DEG C, illustrate that engine bleed force pressure reduces, air conditioner outlet temperature raises.
2.4.2 observe the closedown degree of hot passage valve 6b now, whether the outlet temperature of turbine rises, and whether outlet temperature obviously rises with engine bleed pressure drop; As hot passage valve 6b does not close completely, show that engine bleed pressure reduces the refrigerating capacity under affecting and still has more than needed; As hot passage valve 6b closes completely, show that the refrigerating capacity of air cycle machine is not enough, start bleed air pressure decline that air cycle machine outlet temperature can be made to increase, test terminates;
2.5, turbine outlet back-pressure impact test:
2.5.1 engine bleed pressure is transferred to more than design point pressure, regulates separator outlet valve gradually, increase turbine back-pressure, whether test air cycle machine turbine-exit temperature maintains 2 DEG C ± 2 DEG C, if temperature is higher than 4 DEG C, illustrate that turbine outlet back-pressure increases, air conditioner outlet temperature increases; If temperature is lower than 0 DEG C, illustrate that turbine outlet back-pressure increases, air conditioner outlet temperature reduces;
2.5.2 observe the closedown degree of hot passage valve 6b, whether air cycle machine outlet temperature increases with turbine back-pressure and obviously rises, and whether the temperature drop of turbine reduces; As hot passage valve 6b does not close completely, show that the refrigerating capacity under the impact of turbine outlet back-pressure still has more than needed; As hot passage valve 6b closes completely, show that the refrigerating capacity of air cycle machine is not enough, the increase of turbine outlet back-pressure can make air cycle machine outlet temperature increase, and test terminates.
Advantage of the present invention is: propose the front performance test methods of a kind of aircraft air cycle machine installation, simulation test can be carried out to air cycle machine before installation, achieve and find in advance and fix a breakdown, avoid air cycle machine and break down after installation, ensure that the delivery progress of aircraft.
Accompanying drawing explanation
Fig. 1 is the structural representation after testing equipment of the present invention assembling.
Embodiment
Below the present invention is described in further details.See Fig. 1, performance test methods before the installation of aircraft air cycle machine, is characterized in that: the step of front performance test of carrying out installing is as follows:
1, assembling testing equipment: two-way engine bleed entrance 1 is communicated with two air intake openings of compound check valve 2 by the road respectively, the gas outlet of compound check valve 2 is communicated with the air intake opening of absolute pressure regulator 3 by the road, the gas outlet of absolute pressure regulator 3 is communicated with the air intake opening of Venturi tube 4 by the road, the gas outlet of Venturi tube 4 is communicated with the engine bleed air intake opening 6a of tested air cycle machine 6 by the road, at the air in of air cycle machine 6, cold limit filter screen 5 is installed, at the air out of air cycle machine 6, hot limit filter screen 9 is installed, first thermometer 7 and the first tensimeter 8 is installed at the air in place of air cycle machine 6, detect air themperature and the pressure at the air in place of air cycle machine 6, the gas outlet of air cycle machine 6 engine bleed is communicated with the air intake opening of throttling valve 12 by the road, the gas outlet of throttling valve 12 leads to air, pipeline between the gas outlet and throttling valve 12 of air cycle machine 6 engine bleed is installed the second thermometer 11 and the second tensimeter 10, the temperature signal output terminal being arranged on temperature sensor 14 on air cycle machine 6 internal engine bleed export pipeline is connected by the temperature signal input of wire with temperature controller 13, the control signal output terminal of temperature controller 13 is connected by the control signal input end of wire with the electronic on-off valve 6b on air cycle machine 6 internal engine bleed bypass line,
2 testing procedures:
2.1, cold limit air in and Re Bian air out non-resistance impact test:
2.1.1, the cold limit filter screen 5 of the cold limit air in of air cycle machine and the hot limit filter screen 9 of Re Bian air out are removed, regulate the pipe resistance pressure of separator outlet at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains design load 2 DEG C ± 2 DEG C, if air cycle machine turbine-exit temperature meets design load 2 DEG C ± 2 DEG C, then carry out following testing procedure; If air cycle machine turbine-exit temperature does not meet design load 2 DEG C ± 2 DEG C, then air cycle machine performance inconsistency lattice, test terminates;
2.1.2, observe the closedown degree of the inner hot passage valve 6b of air cycle machine, as hot passage valve 6b does not close completely, show that the refrigerating capacity of air cycle machine still has more than needed, proceed test below; As hot passage valve 6b closes completely, show that the refrigerating capacity of air cycle machine is not enough, air cycle machine performance inconsistency lattice, test terminates;
2.2, cold limit air in drag effects test:
2.2.1, the cold limit filter screen 5 of air cycle machine heat sink inlet is installed, regulate separator export pipeline resistance pressure at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains design load 2 DEG C ± 2 DEG C, if not in temperature range, record this turbine-exit temperature, analyze cold limit air in resistance to the impact of air cycle machine turbine-exit temperature, and contrast with measured turbine-exit temperature in step 2, if temperature is higher than 4 DEG C, illustrate that cold limit air in resistance can increase air conditioner outlet temperature; If temperature is lower than 0 DEG C, illustrate that cold limit air in resistance can reduce air conditioner outlet temperature;
2.2.2 observe the closedown degree of hot passage valve 6b, as hot passage valve 6b does not close completely, show that the refrigerating capacity of air cycle machine under the air in drag effects of cold limit still has more than needed; As hot passage valve 6b closes completely, show that air cycle machine is not enough in the refrigerating capacity of cold limit air in drag effects, test terminates;
2.3, cold limit air in and Re Bian air out all have drag effects to test:
2.3.1, hot limit air out is installed air filter screen 9 is installed, regulate separator export pipeline resistance pressure at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains design load 2 DEG C ± 2 DEG C, if not in temperature range, record this turbine-exit temperature, analyze cold limit air in and Re Bian air out all has resistance to the impact of air cycle machine turbine-exit temperature, and contrast with measured turbine-exit temperature in step 2 and step 3, if temperature is higher than 4 DEG C, illustrate that cold limit air in and Re Bian air out all have resistance can increase air conditioner outlet temperature, if temperature is lower than 0 DEG C, illustrate that cold limit air in and Re Bian air out all have resistance can reduce air conditioner outlet temperature,
2.3.2 observe the closedown degree of hot passage valve 6b, as hot passage valve 6b does not close completely, show that the refrigerating capacity of air cycle machine under cold limit air in and Re Bian air out all have drag effects still has more than needed; As hot passage valve 6b closes completely, show that the refrigerating capacity of air cycle machine under cold limit air in and Re Bian air out all have drag effects is not enough, test terminates;
2.4, engine bleed pressure influence test:
2.4.1 engine bleed pressure is regulated, when engine bleed pressure is down to below design point operating mode gradually, the inlet pressure reduction whether corresponding to top hole pressure of test turbine; Regulate separator export pipeline resistance pressure at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains 2 DEG C ± 2 DEG C, and if temperature is higher than 4 DEG C, illustrate that engine bleed force pressure reduces, air conditioner outlet temperature reduces; If temperature is lower than 0 DEG C, illustrate that engine bleed force pressure reduces, air conditioner outlet temperature raises.
2.4.2 observe the closedown degree of hot passage valve 6b now, whether the outlet temperature of turbine rises, and whether outlet temperature obviously rises with engine bleed pressure drop; As hot passage valve 6b does not close completely, show that engine bleed pressure reduces the refrigerating capacity under affecting and still has more than needed; As hot passage valve 6b closes completely, show that the refrigerating capacity of air cycle machine is not enough, start bleed air pressure decline that air cycle machine outlet temperature can be made to increase, test terminates;
2.5, turbine outlet back-pressure impact test:
2.5.1 engine bleed pressure is transferred to more than design point pressure, regulates separator outlet valve gradually, increase turbine back-pressure, whether test air cycle machine turbine-exit temperature maintains 2 DEG C ± 2 DEG C, if temperature is higher than 4 DEG C, illustrate that turbine outlet back-pressure increases, air conditioner outlet temperature increases; If temperature is lower than 0 DEG C, illustrate that turbine outlet back-pressure increases, air conditioner outlet temperature reduces;
2.5.2 observe the closedown degree of hot passage valve 6b, whether air cycle machine outlet temperature increases with turbine back-pressure and obviously rises, and whether the temperature drop of turbine reduces; As hot passage valve 6b does not close completely, show that the refrigerating capacity under the impact of turbine outlet back-pressure still has more than needed; As hot passage valve 6b closes completely, show that the refrigerating capacity of air cycle machine is not enough, the increase of turbine outlet back-pressure can make air cycle machine outlet temperature increase, and test terminates.
Embodiment 1, front performance test that aircraft air cycle machine installed.
Cold limit air in and the Re Bian air out of air cycle machine all do not install filter screen, regulate separator top hole pressure at 2.1KPa (pipe resistance pressure), test air cycle machine turbine-exit temperature maintains 15 ± 2 DEG C, check the duty of hot passage valve, hot passage valve is closed completely, shows that the refrigerating capacity of air cycle machine is not enough.Air cycle machine turbine-exit temperature design load is 2 ± 2 DEG C, this air-conditioning cold limit air in and Re Bian air out all do not have filter screen to be the most ideal operation state of air-conditioning, this state does not all reach turbine-exit temperature design load, and test shows that this air-conditioning does not meet design requirement.
Embodiment 2, front performance test that aircraft air cycle machine installed.
The cold limit air in of air cycle machine installs cold limit filter screen, hot limit air out installs air filter screen, regulate separator top hole pressure at 2.1KPa (pipe resistance pressure), test air cycle machine turbine-exit temperature maintains 2 ± 2 DEG C (air cycle machine turbine-exit temperature design loads), hot passage valve is not closed completely, show that the refrigerating capacity of air cycle machine still has more than needed, test shows that this air-conditioning meets design requirement.
Claims (1)
1. performance test methods before the installation of aircraft air cycle machine, is characterized in that: the step of front performance test of carrying out installing is as follows:
1.1, assembling testing equipment: two-way engine bleed entrance (1) is communicated with two air intake openings of compound check valve (2) by the road respectively, the gas outlet of compound check valve (2) is communicated with the air intake opening of absolute pressure regulator (3) by the road, the gas outlet of absolute pressure regulator (3) is communicated with the air intake opening of Venturi tube (4) by the road, the gas outlet of Venturi tube (4) is communicated with the engine bleed air intake opening (6a) of tested air cycle machine (6) by the road, at the air in of air cycle machine (6), cold limit filter screen (5) is installed, at the air out of air cycle machine (6), hot limit filter screen (9) is installed, first thermometer (7) and the first tensimeter (8) are installed at the air in place of air cycle machine (6), detect air themperature and the pressure at the air in place of air cycle machine (6), the gas outlet of air cycle machine (6) engine bleed is communicated with the air intake opening of throttling valve (12) by the road, the gas outlet of throttling valve (12) leads to air, pipeline between the gas outlet of air cycle machine (6) engine bleed and throttling valve (12) is installed the second thermometer (11) and the second tensimeter (10), the temperature signal output terminal being arranged on temperature sensor (14) on air cycle machine (6) internal engine bleed export pipeline is connected by the temperature signal input of wire with temperature controller (13), the control signal output terminal of temperature controller (13) is connected by the control signal input end of wire with the electronic on-off valve (6b) on air cycle machine (6) internal engine bleed bypass line,
1.2 testing procedures:
1.2.1, cold limit air in and Re Bian air out non-resistance impact test:
1.2.1.1, cold limit filter screen (5) of the cold limit air in of air cycle machine and hot limit filter screen (9) of hot limit air out are removed, regulate the pipe resistance pressure of separator outlet at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains design load 2 DEG C ± 2 DEG C, if air cycle machine turbine-exit temperature meets design load 2 DEG C ± 2 DEG C, then carry out following testing procedure; If air cycle machine turbine-exit temperature does not meet design load 2 DEG C ± 2 DEG C, then air cycle machine performance inconsistency lattice, test terminates;
1.2.1.2, observe the closedown degree of the inner hot passage valve (6b) of air cycle machine, as hot passage valve (6b) is not closed completely, show that the refrigerating capacity of air cycle machine still has more than needed, proceed test below; As hot passage valve (6b) is closed completely, show that the refrigerating capacity of air cycle machine is not enough, air cycle machine performance inconsistency lattice, test terminates;
1.2.2, cold limit air in drag effects test:
1.2.2.1, cold limit filter screen (5) of air cycle machine heat sink inlet is installed, regulate separator export pipeline resistance pressure at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains design load 2 DEG C ± 2 DEG C, if not in temperature range, record this turbine-exit temperature, analyze cold limit air in resistance to the impact of air cycle machine turbine-exit temperature, and contrast with measured turbine-exit temperature in step 1.2, if temperature is higher than 4 DEG C, illustrate that cold limit air in resistance can increase air conditioner outlet temperature; If temperature is lower than 0 DEG C, illustrate that cold limit air in resistance can reduce air conditioner outlet temperature;
1.2.2.2 observe the closedown degree of hot passage valve (6b), as hot passage valve (6b) is not closed completely, show that the refrigerating capacity of air cycle machine under the air in drag effects of cold limit still has more than needed; As hot passage valve (6b) is closed completely, show that air cycle machine is not enough in the refrigerating capacity of cold limit air in drag effects, test terminates;
1.2.3, cold limit air in and Re Bian air out all have drag effects to test:
1.2.3.1, hot limit air out is installed air filter screen (9) is installed, regulate separator export pipeline resistance pressure at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains design load 2 DEG C ± 2 DEG C, if not in temperature range, record this turbine-exit temperature, analyze cold limit air in and Re Bian air out all has resistance to the impact of air cycle machine turbine-exit temperature, and contrast with measured turbine-exit temperature in step 1.2 and step 1.3, if temperature is higher than 4 DEG C, illustrate that cold limit air in and Re Bian air out all have resistance can increase air conditioner outlet temperature, if temperature is lower than 0 DEG C, illustrate that cold limit air in and Re Bian air out all have resistance can reduce air conditioner outlet temperature,
1.2.3.2 observe the closedown degree of hot passage valve (6b), as hot passage valve (6b) is not closed completely, show that the refrigerating capacity of air cycle machine under cold limit air in and Re Bian air out all have drag effects still has more than needed; As hot passage valve (6b) is closed completely, show that the refrigerating capacity of air cycle machine under cold limit air in and Re Bian air out all have drag effects is not enough, test terminates;
1.2.4, engine bleed pressure influence test:
1.2.4.1 engine bleed pressure is regulated, when engine bleed pressure is down to below design point operating mode gradually, the inlet pressure reduction whether corresponding to top hole pressure of test turbine; Regulate separator export pipeline resistance pressure at 2.1KPa, whether test air cycle machine turbine-exit temperature maintains 2 DEG C ± 2 DEG C, and if temperature is higher than 4 DEG C, illustrate that engine bleed force pressure reduces, air conditioner outlet temperature reduces; If temperature is lower than 0 DEG C, illustrate that engine bleed force pressure reduces, air conditioner outlet temperature raises.
1.2.4.2 observe the closedown degree of hot passage valve (6b) now, whether the outlet temperature of turbine rises, and whether outlet temperature obviously rises with engine bleed pressure drop; As hot passage valve (6b) is not closed completely, show that engine bleed pressure reduces the refrigerating capacity under affecting and still has more than needed; As hot passage valve (6b) is closed completely, show that the refrigerating capacity of air cycle machine is not enough, start bleed air pressure decline that air cycle machine outlet temperature can be made to increase, test terminates;
1.2.5, turbine outlet back-pressure impact test:
1.2.5.1 engine bleed pressure is transferred to more than design point pressure, regulates separator outlet valve gradually, increase turbine back-pressure, whether test air cycle machine turbine-exit temperature maintains 2 DEG C ± 2 DEG C, if temperature is higher than 4 DEG C, illustrate that turbine outlet back-pressure increases, air conditioner outlet temperature increases; If temperature is lower than 0 DEG C, illustrate that turbine outlet back-pressure increases, air conditioner outlet temperature reduces;
1.2.5.2 observe the closedown degree of hot passage valve (6b), whether air cycle machine outlet temperature increases with turbine back-pressure and obviously rises, and whether the temperature drop of turbine reduces; As hot passage valve (6b) is not closed completely, show that the refrigerating capacity under the impact of turbine outlet back-pressure still has more than needed; As hot passage valve (6b) is closed completely, show that the refrigerating capacity of air cycle machine is not enough, the increase of turbine outlet back-pressure can make air cycle machine outlet temperature increase, and test terminates.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290166A (en) * | 2017-07-31 | 2017-10-24 | 中国商用飞机有限责任公司 | Simulate fluid temperature (F.T.) and/or the fast-changing pilot system of pressure and test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050021095A1 (en) * | 2003-07-23 | 2005-01-27 | Medtronic, Inc. | Atrial capture management during atrial and ventricular pacing |
| CN201548399U (en) * | 2009-10-29 | 2010-08-11 | 四川奥特附件维修有限责任公司 | Aviation air cycle machine program controlled testing system |
| CN202133550U (en) * | 2011-06-29 | 2012-02-01 | 南京王行航空附件维修工程有限公司 | Testing stand of air cycle machine of airplane |
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- 2015-04-15 CN CN201510177923.9A patent/CN104792536B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050021095A1 (en) * | 2003-07-23 | 2005-01-27 | Medtronic, Inc. | Atrial capture management during atrial and ventricular pacing |
| CN201548399U (en) * | 2009-10-29 | 2010-08-11 | 四川奥特附件维修有限责任公司 | Aviation air cycle machine program controlled testing system |
| CN202133550U (en) * | 2011-06-29 | 2012-02-01 | 南京王行航空附件维修工程有限公司 | Testing stand of air cycle machine of airplane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290166A (en) * | 2017-07-31 | 2017-10-24 | 中国商用飞机有限责任公司 | Simulate fluid temperature (F.T.) and/or the fast-changing pilot system of pressure and test method |
| CN107290166B (en) * | 2017-07-31 | 2020-07-21 | 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 |
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