CN114348295A - Test system and method for measuring aerodynamic performance of helium gas compressor - Google Patents
Test system and method for measuring aerodynamic performance of helium gas compressor Download PDFInfo
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- CN114348295A CN114348295A CN202210006027.6A CN202210006027A CN114348295A CN 114348295 A CN114348295 A CN 114348295A CN 202210006027 A CN202210006027 A CN 202210006027A CN 114348295 A CN114348295 A CN 114348295A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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Abstract
The invention discloses a test system and a method for measuring the aerodynamic performance of a helium gas compressor, wherein the test system comprises: the device comprises an annular pipeline, a heat exchanger, a helium storage tank, a liquid nitrogen storage tank, a laminar flow meter, a helium compressor, a flow regulating valve, a vacuum pump and a controller are arranged on the annular pipeline, and a first temperature and pressure sensor and a second temperature and pressure sensor are respectively arranged on two sides of the heat exchanger on the annular pipeline; an inlet and an outlet of the laminar flow meter are respectively provided with a third temperature and pressure sensor and a fourth temperature and pressure sensor; and a fifth temperature and pressure sensor and a sixth temperature and pressure sensor are respectively arranged at the positions of the inlet and the outlet of the helium gas compressor on the annular pipeline. The system is simple in structure and reliable in performance, parameters of the working condition environment of the helium compressor of the stratospheric airship can be simulated on the ground, the P-Q performance of the compressor can be effectively measured by using a helium medium, and effective support is provided for design optimization and performance evaluation of the compressor, overall design of the airship platform and use of environment control and pressure regulation.
Description
Technical Field
The invention relates to the technical field of a performance test system of a gas compressor for a stratospheric airship, in particular to a test system and a method for measuring the aerodynamic performance of a helium gas compressor.
Background
The stratospheric airship is an aircraft which is lifted off and parked off by static buoyancy provided by helium, is an inflated flexible body, and is required to keep the internal and external pressure difference within a certain range in the whole flight process through pressure control, so that the external shape and the pressure safety of the whole aerostat are kept.
During long-time parking in the air, the air in the main bag can generate serious overheating phenomenon under the influence of radiation factors such as illumination in the daytime, so that the temperature and the pressure in the main bag are continuously increased, and in order to avoid bursting caused by overlarge pressure difference, a regulating and controlling means is needed to discharge part of helium in the main bag. The novel helium sequential pressure regulating system is adopted, a plurality of helium capsule mechanisms are introduced, helium in an outer capsule is pressed into an overpressure container with stronger bearing capacity and higher pressure by a helium compressor in the daytime, the problem of overheating and overpressure in the daytime can be solved, and the helium is prevented from being released outside a boat to cause waste of buoyancy-rising helium in a platform; helium in the overpressure container is released into the outer bag at night, the internal pressure of the outer bag is kept at a low overpressure level, and the internal and external pressure difference and the external shape of the airship are controlled and adjusted, so that the safety of the airship platform is guaranteed, and the efficient utilization of the buoyancy lift helium is also guaranteed. Based on the process, the helium gas compressor is a key component for regulating and controlling the pressure difference in the long-term air-parking process of the airship.
The helium gas compressor has a large difficulty in air compression, is complex in structure and has a large technical difficulty, and in order to better understand the real performance index of the helium gas compressor and provide a basis for the design of the gas compressor, the design of an airship platform and the use of environment-controlled pressure regulation, the performance of the gas compressor needs to be tested by adopting a low-temperature low-pressure helium medium in a ground environment. The low-pressure helium environment is difficult to realize, because the traditional centrifugal compressor generally has low requirements on sealing, slight leakage has little influence on performance, if helium is adopted as a test medium, on one hand, the sealing requirements on products, test instruments, test equipment and the like are improved, and in addition, equipment needs to be newly added, so that the research and development cost is greatly increased. If air is used as the medium, the difference between the performance of helium and the performance of air is large, and large errors are caused by similar conversion. The performance of a helium compressor for an stratospheric airship is effectively verified on the ground at home and abroad, and the general traditional test modes mainly comprise two types: (1) after the ground environment air medium is tested, the performance of a target medium and environmental parameters (pressure and temperature) is converted by adopting similarity, and a certain error exists in the method; (2) the large vacuum chamber is used for testing, the conventional large vacuum chamber can only regulate pressure, cannot regulate temperature and cannot adopt a target medium.
Therefore, how to provide a test system and a method for measuring the aerodynamic performance of a helium compressor, which can simulate the parameters of the working condition environment of the helium compressor of an airship on the ground, effectively measure the P-Q performance of the compressor and provide effective support for the design optimization and performance evaluation of the compressor, the overall design of the airship platform and the use of environment-controlled pressure regulation, is a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides a test system and a method for measuring the aerodynamic performance of a helium compressor, which can simulate the parameters of the working condition environment of the helium compressor of an airship on the ground, effectively measure the P-Q performance of the compressor, and provide effective support for the design optimization and performance evaluation of the compressor, the overall design of the airship platform and the use of environment control and pressure regulation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a test system for measuring aerodynamic performance of a helium compressor, comprising:
the heat exchanger is arranged on the annular pipeline, and a first temperature and pressure sensor and a second temperature and pressure sensor are respectively arranged on two sides of the heat exchanger on the annular pipeline;
the helium storage tank is connected with the annular pipeline through a helium conveying pipeline and is arranged close to the first temperature and pressure sensor, and a helium electric control valve is arranged on the helium conveying pipeline;
the liquid nitrogen storage tank is connected with the heat exchanger through a liquid nitrogen conveying pipeline, and a nitrogen electric control valve is arranged on the liquid nitrogen conveying pipeline;
the laminar flow meter is arranged on the annular pipeline and is positioned on the outlet side of the heat exchanger, and an inlet and an outlet of the laminar flow meter are respectively provided with a third temperature and pressure sensor and a fourth temperature and pressure sensor;
the helium gas compressor is arranged on the annular pipeline and is positioned on the outlet side of the laminar flow meter, and a fifth temperature and pressure sensor and a sixth temperature and pressure sensor are respectively arranged on the annular pipeline and are positioned at the inlet and the outlet of the helium gas compressor;
the flow regulating valve is arranged on the annular pipeline and is positioned on the outlet side of the helium gas compressor;
the vacuum pump is arranged on the annular pipeline and is positioned between the flow regulating valve and the helium storage tank;
and the controller is electrically connected with the first temperature and pressure sensor, the second temperature and pressure sensor, the helium electric control valve, the nitrogen electric control valve, the laminar flow meter, the third temperature and pressure sensor, the fourth temperature and pressure sensor, the helium gas compressor, the fifth temperature and pressure sensor, the sixth temperature and pressure sensor and the vacuum pump.
According to the technical scheme, compared with the prior art, the test system for measuring the aerodynamic performance of the helium compressor is simple in structure and reliable in performance, parameters of the working condition environment of the helium compressor of the airship on the ground can be simulated, the P-Q performance of the compressor can be effectively measured by using a helium medium, and effective support is provided for design optimization and performance evaluation of the compressor, overall design of the airship platform and use of environment control and pressure regulation.
Further, the vacuum pump is connected with the annular pipeline through a pump connecting pipe, and an electric control sealing valve electrically connected with the controller is arranged on the pump connecting pipe.
The beneficial effect that adopts above-mentioned technical scheme to produce is, after the evacuation, close the vacuum pump, and the automatically controlled seal valve of controller control is closed immediately this moment to prevent that the external air from flowing back to in the ring line, guarantee to be in the vacuum state in the ring line.
Furthermore, the outer pipe wall of the annular pipeline is wrapped with a heat insulation material layer.
The beneficial effect that adopts above-mentioned technical scheme to produce is, the loss of reducible whole test system temperature guarantees that the system tests under predetermined temperature environment.
Furthermore, the helium compressor is connected with the annular pipeline through a connecting flange.
The technical scheme has the beneficial effect of facilitating quick assembly and disassembly of the helium compressor.
The invention provides a test method for measuring the aerodynamic performance of a helium gas compressor, which comprises the following steps of:
step S1: after the whole system is assembled and sealed, manually adjusting the flow regulating valve to a fully open state, then opening the vacuum pump through the controller to vacuumize the annular pipeline, and closing the vacuum pump after vacuumizing;
step S2: manually adjusting the flow regulating valve to a completely closed state, opening the helium electric control valve through the controller to fill helium into the annular pipeline, simultaneously opening the nitrogen electric control valve, enabling nitrogen to enter the heat exchanger through a liquid nitrogen conveying pipeline to cool the helium in the annular pipeline, manually adjusting the flow regulating valve to a completely open state after the second temperature and pressure sensor detects that the temperature and pressure value of the helium in the annular pipeline reaches the target temperature and pressure value preset by the controller, then starting the helium gas compressor, carrying out a formal test after the temperature and pressure value detected by the fifth temperature and pressure sensor reaches the target temperature and pressure value preset by the controller, and at the moment, recording test data of each instrument in the completely open state of the flow regulating valve;
step S3: gradually reducing the opening and closing angle of the flow regulating valve, recording data after the fifth temperature and pressure sensor parameter and the helium compressor state parameter in the system to be regulated are stable each time until the helium compressor starts to surge, recording data of each instrument and stopping running the helium compressor, and finishing the test;
step S4: and drawing a P-Q performance curve according to the test data.
Further, in step S1, after the vacuum pump is turned off, the controller controls the electronically controlled sealing valve to close.
Further, the pressure of the target temperature and pressure value is 5700 +/-200 pa, and the temperature is-40 +/-3 ℃.
Further, the helium compressor state parameters comprise a voltage parameter and a current parameter.
According to the technical scheme, compared with the prior art, the method for testing the aerodynamic performance of the helium gas compressor can simulate the parameters of the working condition environment of the helium gas compressor of the airship on the ground, can effectively use the helium medium to measure the P-Q performance of the compressor, and provides effective support for design optimization and performance evaluation of the compressor, overall design of the airship platform and use of environment control and pressure regulation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a test system for measuring the aerodynamic performance of a helium compressor provided by the invention.
FIG. 2 is a schematic view showing a connection structure of a helium gas storage tank, a liquid nitrogen storage tank, a heat exchanger and a loop line.
FIG. 3 is a schematic structural view of a connecting flange on a helium compressor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to fig. 3, an embodiment of the present invention discloses a test system for measuring the pneumatic performance of a helium compressor, including:
the device comprises an annular pipeline 1, wherein a heat exchanger 2 is arranged on the annular pipeline 1, and a first temperature and pressure sensor 3 and a second temperature and pressure sensor 4 are respectively arranged on two sides of the heat exchanger 2 on the annular pipeline 1 and used for measuring temperature and pressure data on two sides of the heat exchanger;
a helium storage tank 5 (with a safety vent valve), wherein the helium storage tank 5 is connected with the annular pipeline 1 through a helium conveying pipeline 6 and is arranged close to the first temperature and pressure sensor 3, and a helium electric control valve 7 is arranged on the helium conveying pipeline 6 and is used for inflating the annular pipeline and supplementing air according to subsequent requirements;
a liquid nitrogen storage tank 8 (with a safety vent valve), wherein the liquid nitrogen storage tank 8 is connected with the heat exchanger 2 through a liquid nitrogen conveying pipeline 9, and a nitrogen electric control valve 10 is arranged on the liquid nitrogen conveying pipeline 9, wherein the opening or closing of the helium electric control valve and the nitrogen electric control valve is controlled by comparing temperature and pressure data acquired by the first temperature and pressure sensor 3 and the second temperature and pressure sensor 4 with target temperature and pressure, so that the temperature and pressure in the annular pipeline are adjusted;
the laminar flow meter 11 (can change low-temperature low-pressure gas in the annular pipeline into a laminar flow form, and is convenient for accurately measuring and collecting temperature and pressure parameters and flow of the gas in the pipeline), the laminar flow meter 11 is arranged on the annular pipeline 1 and is positioned at the outlet side of the heat exchanger 2, and an inlet and an outlet of the laminar flow meter 11 are respectively provided with a third temperature and pressure sensor 12 and a fourth temperature and pressure sensor 13;
the helium compressor 14 is arranged on the annular pipeline 1 and is positioned on the outlet side of the laminar flow meter 11, and a fifth temperature and pressure sensor 15 and a sixth temperature and pressure sensor 16 are respectively arranged on the annular pipeline 1 and are positioned at the inlet and the outlet of the helium compressor 14, are used for measuring and collecting the temperature and the pressure of the inlet and the outlet of the helium compressor and are used for calibrating and measuring the P-Q performance;
a flow control valve 17 (on which the mark lines of closing in place, opening in place and angle scale are marked), wherein the flow control valve 17 is arranged on the annular pipeline 1 and is positioned at the outlet side of the helium compressor 14;
the vacuum pump 18 is arranged on the annular pipeline 1 and is positioned between the flow regulating valve 17 and the helium storage tank 5;
the controller 19 and the controller 19 are electrically connected with the first temperature and pressure sensor 3, the second temperature and pressure sensor 4, the helium electric control valve 7, the nitrogen electric control valve 10, the laminar flow meter 11, the third temperature and pressure sensor 12, the fourth temperature and pressure sensor 13, the helium compressor 14, the fifth temperature and pressure sensor 15, the sixth temperature and pressure sensor 16 and the vacuum pump 18.
The first temperature and pressure sensor 3, the second temperature and pressure sensor 4, the third temperature and pressure sensor 12, the fourth temperature and pressure sensor 13, the fifth temperature and pressure sensor 15 and the sixth temperature and pressure sensor 16 all comprise temperature sensors and pressure sensors.
The vacuum pump 18 is connected to the ring pipeline 1 through a pump connection pipe 20, and an electrically controlled sealing valve 21 electrically connected to the controller 19 is provided on the pump connection pipe 20.
The outer pipe wall of the annular pipeline 1 is wrapped with a heat insulation material layer.
The helium compressor 14 is connected to the ring line 1 via a connecting flange 22.
The embodiment of the invention also provides a test method for measuring the aerodynamic performance of the helium gas compressor, which uses a test system for measuring the aerodynamic performance of the helium gas compressor to carry out the following steps:
step S1: after the whole system is assembled and sealed, manually adjusting a flow regulating valve 17 to be in a fully open state, then opening a vacuum pump 18 through a controller 19 to vacuumize the annular pipeline 1, performing tightness detection on each connecting part in the system in the vacuumizing process to ensure the sealing performance of the annular pipeline, and closing the vacuum pump 18 when the pressure displayed by a pressure gauge on the vacuum pump 18 is below 50Pa so as to enable the annular pipeline 1 to be in a vacuum state and prepare for subsequent helium filling and test testing;
step S2: manually adjusting a flow adjusting valve 17 to be in a completely closed state, opening a helium electric control valve 7 through a controller 19 to fill helium into the annular pipeline 1, simultaneously opening a nitrogen electric control valve 10, enabling nitrogen to enter a heat exchanger 2 through a liquid nitrogen conveying pipeline 9 to cool the helium in the annular pipeline 1, manually adjusting the flow adjusting valve 17 to be in a completely open state after a second temperature and pressure sensor 4 detects that the temperature and pressure value of the helium in the annular pipeline 1 reaches a target temperature and pressure value preset by the controller, then starting a helium gas compressor 14, carrying out a formal test after the temperature and pressure value detected by a fifth temperature and pressure sensor 15 reaches the target temperature and pressure value preset by the controller, and at the moment, recording test data of each instrument in the completely open state of the flow adjusting valve 17;
step S3: gradually reducing the opening and closing angle of the adjusting flow regulating valve 17 to adjust the back pressure working point of the helium compressor operation, facilitating the measurement of the P-Q performance point and the drawing of the performance curve, recording data after the parameters of the fifth temperature and pressure sensor 15 and the state parameters of the helium compressor 14 in the system are stabilized each time, recording the data of each instrument and stopping the operation of the helium compressor 14 until the helium compressor 14 starts to generate surge phenomenon, and finishing the test;
step S4: and drawing a P-Q performance curve according to the test data.
After the vacuum pump 18 is turned off, the controller 19 controls the electronically controlled sealing valve 21 to close, so as to prevent external air from flowing back into the annular pipeline and ensure that the annular pipeline is in a vacuum state.
The pressure of the target temperature and pressure value is 5700 +/-200 pa, and the temperature is-40 +/-3 ℃.
The helium compressor 14 state parameters include voltage parameters and current parameters.
The test system is simple in structure and reliable in performance, parameters of working condition environments of the helium gas compressor of the airship on the ground can be simulated by the test method, the P-Q performance of the compressor can be effectively measured by using a helium medium, and effective support is provided for design optimization and performance evaluation of the compressor, overall design of the airship platform and use of environment-controlled pressure regulation. The test system and the test method are also suitable for performance test of other fan equipment, and can solve the problem that the performance of the equipment cannot be measured under real working condition medium environment parameters.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A test system for measuring aerodynamic performance of a helium compressor is characterized by comprising:
the device comprises an annular pipeline (1), wherein a heat exchanger (2) is arranged on the annular pipeline (1), and a first temperature and pressure sensor (3) and a second temperature and pressure sensor (4) are respectively arranged on the annular pipeline (1) and positioned on two sides of the heat exchanger (2);
the helium storage tank (5) is connected with the annular pipeline (1) through a helium conveying pipeline (6) and is arranged close to the first temperature and pressure sensor (3), and a helium electric control valve (7) is arranged on the helium conveying pipeline (6);
the liquid nitrogen storage tank (8) is connected with the heat exchanger (2) through a liquid nitrogen conveying pipeline (9), and a nitrogen electric control valve (10) is arranged on the liquid nitrogen conveying pipeline (9);
the laminar flow meter (11) is arranged on the annular pipeline (1) and is positioned on the outlet side of the heat exchanger (2), and an inlet and an outlet of the laminar flow meter (11) are respectively provided with a third temperature and pressure sensor (12) and a fourth temperature and pressure sensor (13);
the helium compressor (14) is arranged on the annular pipeline (1) and is positioned on the outlet side of the laminar flow meter (11), and a fifth temperature and pressure sensor (15) and a sixth temperature and pressure sensor (16) are respectively arranged on the annular pipeline (1) at the positions of the inlet and the outlet of the helium compressor (14);
the flow regulating valve (17) is arranged on the annular pipeline (1) and is positioned on the outlet side of the helium compressor (14);
a vacuum pump (18), wherein the vacuum pump (18) is arranged on the annular pipeline (1) and is positioned between the flow regulating valve (17) and the helium gas storage tank (5);
a controller (19), the controller (19) all with first warm-pressing sensor (3), second warm-pressing sensor (4), helium electric control valve (7), nitrogen electric control valve (10), laminar flow meter (11), third warm-pressing sensor (12), fourth warm-pressing sensor (13), helium compressor (14), fifth warm-pressing sensor (15), sixth warm-pressing sensor (16), vacuum pump (18) electricity is connected.
2. A test system for measuring aerodynamic performance of a helium compressor as claimed in claim 1, wherein said vacuum pump (18) is connected to said annular pipeline (1) through a pump connecting pipe (20), and an electrically controlled sealing valve (21) electrically connected to said controller (19) is provided on said pump connecting pipe (20).
3. The test system for measuring the aerodynamic performance of the helium compressor as claimed in claim 1, wherein the outer pipe wall of the annular pipeline (1) is wrapped with a thermal insulation material layer.
4. Test system for measuring the aerodynamic performance of a helium compressor as claimed in claim 1, characterized in that the helium compressor (14) is connected to the ring line (1) by means of a connecting flange (22).
5. A test method for measuring the aerodynamic performance of a helium compressor, which is characterized by using the test system for measuring the aerodynamic performance of the helium compressor according to any one of claims 1 to 4 to perform the following steps:
step S1: after the whole system is assembled and sealed, manually adjusting a flow regulating valve (17) to a fully open state, then opening a vacuum pump (18) through a controller (19) to vacuumize the annular pipeline (1), and closing the vacuum pump (18) after vacuumizing;
step S2: manually adjusting a flow regulating valve (17) to a completely closed state, opening a helium electric control valve (7) through a controller (19) to fill helium into an annular pipeline (1), simultaneously opening a nitrogen electric control valve (10), enabling nitrogen to enter a heat exchanger (2) through a liquid nitrogen conveying pipeline (9) to cool the helium in the annular pipeline (1), manually adjusting the flow regulating valve (17) to a completely open state after a second temperature and pressure sensor (4) detects that the temperature and pressure value of the helium in the annular pipeline (1) reaches a target temperature and pressure value preset by the controller, then starting a helium compressor (14), carrying out a formal test after the temperature and pressure value detected by a fifth temperature and pressure sensor (15) reaches the target temperature and pressure value preset by the controller, and recording test data of each instrument in the completely open state of the flow regulating valve (17);
step S3: gradually reducing the opening and closing angle of the flow regulating valve (17), recording data after the parameters of a fifth temperature and pressure sensor (15) in the system and the state parameters of the helium gas compressor (14) are regulated to be stable each time until the helium gas compressor (14) starts to surge, recording the data of each instrument, stopping running the helium gas compressor (14), and finishing the test;
step S4: and drawing a P-Q performance curve according to the test data.
6. The test method for measuring the pneumatic performance of the helium compressor as claimed in claim 5, wherein in step S1, after the vacuum pump (18) is turned off, the controller (19) controls the electronically controlled sealing valve (21) to be closed.
7. A test method for measuring aerodynamic performance of a helium compressor as claimed in claim 5, wherein the target warm pressure value has a pressure of 5700 ± 200pa and a temperature of-40 ± 3 ℃.
8. Test method for measuring the aerodynamic performance of a helium compressor as claimed in claim 5, characterized in that the state parameters of the helium compressor (14) comprise voltage parameters and current parameters.
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| CN202210006027.6A CN114348295A (en) | 2022-01-05 | 2022-01-05 | Test system and method for measuring aerodynamic performance of helium gas compressor |
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| CN202210006027.6A CN114348295A (en) | 2022-01-05 | 2022-01-05 | Test system and method for measuring aerodynamic performance of helium gas compressor |
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Cited By (1)
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| CN115356096A (en) * | 2022-08-18 | 2022-11-18 | 西安交通大学 | System and method for researching surge characteristic of compressor pipe network system |
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