Vacuum and atmospheric environment coexistence test device and method for wind tunnel test

Abstract

The invention discloses a vacuum and atmospheric environment coexistence test device and method for a wind tunnel test in the technical field of vacuum test, an atmospheric environment cavity is arranged in a vacuum cavity, the vacuum cavity is not communicated with the atmospheric environment cavity, and an execution unit of the test device is located in the vacuum cavity. The electronic control unit of the testing device is located in the atmospheric environment cavity, so that the execution unit and the electronic control unit both work in a proper environment, it is guaranteed that the testing device can complete a testing task, the testing device does not need to be transformed, the equipment cost is reduced, and the experiment acceptance efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum testing, and particularly relates to a test device and method for coexisting vacuum and atmospheric environments for wind tunnel testing. Background Art

[0002] In fields such as aerospace, wind tunnel testing is an important means to verify system performance. In order to make the aerodynamic environment in the wind tunnel reach the preset target, some test devices are needed to detect the aerodynamic data in the wind tunnel, so as to monitor and control the aerodynamic environment in the wind tunnel.

[0003] Currently, when performing aerodynamic data detection, the common practice is to place the test device completely in a vacuum environment. In order to make the test device adapt to the vacuum environment, the test device needs to be specially designed and customized, with high time cost and equipment cost, and the device modification will slow down the experimental efficiency.

[0004] For example, when a vacuum gauge measures pressure, its execution unit (sensing probe, gauge front end) needs to be directly exposed to the vacuum environment to sense the air pressure in the measured cavity. And the electronic control unit of the vacuum gauge (such as the signal processing module, power supply part) is sensitive to temperature and pressure, and can work normally in the atmospheric environment, but may overheat, have poor heat dissipation or cannot work normally in the vacuum environment, so special modification is needed. Summary of the Invention

[0005] The purpose of the present invention is to provide a test device and method for coexisting vacuum and atmospheric environments for wind tunnel testing, so as to solve the technical problems in the prior art that when performing wind tunnel testing, in order to make the test device adapt to the vacuum environment, the test device needs to be specially designed and customized, with high time cost and equipment cost, and low experimental efficiency.

[0006] To solve the above technical problems, the present invention specifically provides a test device for coexisting vacuum and atmospheric environments for wind tunnel testing, including:

[0007] A vacuum cavity for providing a vacuum or ultra-high vacuum environment;

[0008] An atmospheric environment cavity is arranged in the vacuum cavity, communicated with the external atmospheric environment, and the atmospheric environment cavity is not communicated with the vacuum cavity;

[0009] A flow field generation system is installed on the vacuum cavity for generating a jet to simulate a real aerodynamic environment in the vacuum cavity;

[0010] A test device, wherein the execution unit of the test device is partially or entirely located within the vacuum chamber to measure the flow field data within the vacuum chamber, and the electronic control unit of the test device is located within the atmospheric environment chamber.

[0011] As a preferred embodiment of the present invention, the atmospheric environment chamber is connected to the atmospheric environment through an instrument line pipeline, the connection part between the instrument line pipeline and the vacuum chamber is sealed, and an instrument line for connecting the test device to an external data acquisition device is provided within the instrument line pipeline to monitor and record the flow field data in real time.

[0012] As a preferred embodiment of the present invention, the test device is fixedly installed on the interface between the atmospheric environment chamber and the vacuum chamber, and the connection part between the test device and the interface is sealed.

[0013] As a preferred embodiment of the present invention, the vacuum chamber and the atmospheric environment chamber are respectively formed by being surrounded by a large housing and a small housing. The small housing is fixedly installed within the large housing. The interior of the small housing is the atmospheric environment chamber, and the space between the small housing and the large housing is the vacuum chamber;

[0014] The test device is fixedly installed on the small housing, and a sealing ring is provided at the connection part between the test device and the small housing;

[0015] The execution unit is partially or entirely located within the vacuum chamber between the small housing and the large housing.

[0016] The present invention also provides a test method for coexisting vacuum and atmospheric environments for wind tunnel testing, including the following steps:

[0017] Set up two independent and non-connected vacuum chambers and atmospheric environment chambers. The interior of the vacuum chamber is a vacuum environment, and the atmospheric environment chamber is connected to the external environment;

[0018] Place the execution unit of the test device within the vacuum chamber, and locate the electronic control unit of the test device within the atmospheric environment chamber;

[0019] Simulate an aerodynamic environment within the vacuum chamber, and collect the flow field data within the vacuum chamber through the execution unit of the test device; or, simulate an aerodynamic environment within the vacuum chamber to detect the performance of the test device.

[0020] The present invention has the following beneficial effects compared with the prior art:

[0021] In the present invention, an atmospheric environment cavity is arranged inside a vacuum cavity, and the vacuum cavity is not communicated with the atmospheric environment cavity. The execution unit of the test device is located inside the vacuum cavity to measure the flow field data inside the vacuum cavity. The electronic control unit of the test device is located inside the atmospheric environment cavity, so that both the execution unit and the electronic control unit can work in a suitable environment, which not only ensures that the test device can complete the test task, but also does not require modification of the test device, reduces the equipment cost, and improves the experimental acceptance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0023] Figure 1 is a schematic structural diagram of the test device in the present invention;

[0024] Figure 2 is a schematic structural diagram of the atmospheric environment cavity, the instrument line pipeline and the sealing ring in the present invention.

[0025] The reference numerals in the drawings are respectively represented as follows:

[0026] 1 - vacuum cavity, 2 - atmospheric environment cavity, 3 - flow field generation system, 4 - instrument line pipeline, 5 - sealing ring, 6 - jet flow, 7 - test device, 8 - execution unit, 9 - electronic control unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0028] The concept of the present invention is that in the ground test stage, only the execution unit 8 of the test device 7 needs to be located in the vacuum environment, and the electronic control unit 9 working in the atmospheric environment does not affect the execution unit 8 to collect the flow field data. Breaking through the traditional concept, an atmospheric environment cavity 2 is arranged inside the vacuum cavity 1, so that the wind tunnel test device 7 can simultaneously meet the test conditions of coexistence of vacuum and atmospheric environments. While ensuring that the test device 7 can complete the test task, the electronic control unit 9 is located in a suitable working environment without additional modification.

[0029] The present invention specifically provides a test device with coexisting vacuum and atmospheric environments for wind tunnel testing, including:

[0030] A vacuum chamber 1 for providing a vacuum or ultra-high vacuum environment;

[0031] An atmospheric environment chamber 2 is arranged inside the vacuum chamber 1, communicating with the external atmospheric environment, and the atmospheric environment chamber 2 is not connected to the vacuum chamber 1;

[0032] A flow field generation system 3 is installed on the vacuum chamber 1 for generating a jet flow 6 to simulate a real aerodynamic environment inside the vacuum chamber 1;

[0033] A test device 7, and the execution unit 8 of the test device 7 is partially or entirely located inside the vacuum chamber 1 to measure the flow field data inside the vacuum chamber 1, and the electronic control unit 9 of the test device 7 is located in the atmospheric environment chamber 2.

[0034] By arranging the atmospheric environment chamber 2 inside the vacuum chamber 1 in the present invention, and the vacuum chamber 1 is not connected to the atmospheric environment chamber 2, the execution unit 8 of the test device 7 is located inside the vacuum chamber 1 to measure the flow field data inside the vacuum chamber 1, and the electronic control unit 9 of the test device 7 is located in the atmospheric environment chamber 2, enabling both the execution unit 8 and the electronic control unit 9 to work in suitable environments, which not only ensures that the test device 7 can complete the test tasks, but also eliminates the need to modify the test device 7, reduces equipment costs, and improves the experimental acceptance efficiency.

[0035] Furthermore, the atmospheric environment chamber 2 is connected to the atmospheric environment through an instrument line pipeline 4, the connection part of the instrument line pipeline 4 and the vacuum chamber 1 is sealed, and an instrument line for connecting the test device 7 with an external data acquisition device is arranged inside the instrument line pipeline 4 to monitor and record the flow field data in real time. The atmospheric environment chamber 2 needs to be connected to the external environment through a pipeline, and this pipeline also serves as the wire conduit for the instrument line. On the one hand, it can save a pipeline, and on the other hand, it can reduce a penetration interface on the vacuum chamber 1, improving the sealing performance.

[0036] Furthermore, the test device 7 is fixedly installed on the interface between the atmospheric environment chamber 2 and the vacuum chamber 1, and the connection part of the test device 7 and the interface is sealed to keep the vacuum chamber 1 and the atmospheric environment chamber 2 isolated. It is equivalent to installing the test device 7 at the junction of the two chambers, making the execution unit 8 of the test device 7 partially or entirely located inside the vacuum chamber 1, and the electronic control unit 9 located inside the atmospheric environment chamber 2.

[0037] Furthermore, the vacuum chamber 1 and the atmospheric environment chamber 2 are respectively surrounded by a large shell and a small shell. The small shell is fixedly installed inside the large shell. The inside of the small shell is the atmospheric environment chamber 2, and the space between the small shell and the large shell is the vacuum chamber 1;

[0038] The test device 7 is fixedly installed on the small housing, and a sealing ring 5 is provided at the connection part between the test device 7 and the small housing;

[0039] The execution unit 8 is partially or entirely located in the vacuum chamber 1 between the small housing and the large housing.

[0040] The housing can be set as an annular housing.

[0041] The present invention also provides a test method for the coexistence of vacuum and atmospheric environments for wind tunnel testing, including the following steps:

[0042] Set two independent and non-connected vacuum chambers 1 and atmospheric environment chambers 2. The inside of the vacuum chamber 1 is a vacuum environment, and the atmospheric environment chamber 2 is connected to the external environment;

[0043] Place the execution unit 8 of the test device 7 in the vacuum chamber 1, and place the electronic control unit 9 of the test device 7 in the atmospheric environment chamber 2;

[0044] Simulate the aerodynamic environment in the vacuum chamber 1, and collect the flow field data in the vacuum chamber 1 through the execution unit 8 of the test device 7; alternatively, the performance of the test device 7 can also be detected by simulating the aerodynamic environment in the vacuum chamber 1.

[0045] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. An experimental device with coexisting vacuum and atmospheric environments for wind tunnel testing, characterized in that, Comprising: A vacuum chamber (1) with a vacuum or ultra-high vacuum environment inside; An atmospheric environment chamber (2) disposed within the vacuum chamber (1), communicating with the external atmospheric environment, and the atmospheric environment chamber (2) is not in communication with the vacuum chamber (1); A flow field generating system (3) installed on the vacuum chamber (1) for generating a jet flow (6) to simulate a real aerodynamic environment within the vacuum chamber (1); A test device (7), wherein the execution unit (8) of the test device (7) is partially or entirely located within the vacuum chamber (1) to measure the flow field data within the vacuum chamber (1), and the electronic control unit (9) of the test device (7) is located within the atmospheric environment chamber (2).

2. The test device with coexisting vacuum and atmospheric environments for wind tunnel testing according to claim 1, characterized in that The atmospheric environment chamber (2) is connected to the atmospheric environment through an instrument line pipeline (4), the connection part of the instrument line pipeline (4) and the vacuum chamber (1) is sealed, and an instrument line for connecting the test device (7) with an external data acquisition device is provided within the instrument line pipeline (4) to monitor and record the flow field data in real time.

3. The test device with coexisting vacuum and atmospheric environments for wind tunnel testing according to claim 1, characterized in that The test device (7) is fixedly installed on the interface between the atmospheric environment chamber (2) and the vacuum chamber (1), and the connection part of the test device (7) and the interface is sealed.

4. The test device with coexisting vacuum and atmospheric environments for wind tunnel testing according to claim 3, characterized in that The vacuum chamber (1) and the atmospheric environment chamber (2) are respectively surrounded by a large housing and a small housing, the small housing is fixedly installed within the large housing, the inside of the small housing is the atmospheric environment chamber (2), and the space between the small housing and the large housing is the vacuum chamber (1); The test device (7) is fixedly installed on the small housing, and a sealing ring (5) is provided at the connection part of the test device (7) and the small housing; The execution unit (8) is partially or entirely located within the vacuum chamber (1) between the small housing and the large housing.

5. A test method for coexisting vacuum and atmospheric environments in wind tunnel testing, characterized in that, Including the following steps: Providing two mutually independent and non-communicating vacuum chambers (1) and atmospheric environment chambers (2), with a vacuum environment inside the vacuum chamber (1) and the atmospheric environment chamber (2) communicating with the external environment; Placing the execution unit (8) of the test device (7) within the vacuum chamber (1) and locating the electronic control unit (9) of the test device (7) within the atmospheric environment chamber (2); Simulating an aerodynamic environment within the vacuum chamber (1) and collecting the flow field data within the vacuum chamber (1) through the execution unit (8) of the test device (7); or, simulating an aerodynamic environment within the vacuum chamber (1) to detect the performance of the test device (7).

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