Environmental test method for combining high-temperature storage test and high-temperature working test

Abstract

The invention belongs to the field of airborne equipment environment tests, and particularly relates to an environment test method for combining high-temperature storage and high-temperature working tests, which comprises the following steps of: (1) determining high-temperature working temperature and high-temperature storage temperature according to the product type, the installation position and the medium temperature; (2) combining the high-temperature working test program and the high-temperature storage test program into a continuous test process; and (3) sequentially finishing a high-temperature working test and a high-temperature storage test according to the combined test program.

Description

Technical Field

[0001] This application belongs to the field of environmental testing for airborne equipment, and specifically relates to an environmental testing method that combines high-temperature storage and high-temperature operation tests. Background Technology

[0002] To demonstrate the aircraft's environmental adaptability under various anticipated usage scenarios, airborne equipment must undergo corresponding low-pressure operation, low-pressure storage, high-temperature operation, high-temperature storage, low-temperature operation, and low-temperature storage tests in accordance with the requirements of the airborne equipment agreement or contract and the test methods specified in GJB 150A or RTCA / DO-160G. Since low-pressure, high-temperature, and low-temperature environments each encompass both operational and storage tests, for mechanical airborne equipment, the differences between their operational and storage states lie only in the medium and motion. There is no impact from the heat generated during startup or prolonged operation, as is the case with electronic products. Furthermore, the preliminary test procedures for storage and operational tests are similar, both involving the same time required for the equipment to maintain temperature stability under non-operational conditions, as well as pre- and post-test functional and performance inspections. Combining storage and operational tests can shorten the testing cycle, reduce development costs, and improve product development progress.

[0003] Some products, such as high-temperature venting valves, fuel lines and connectors, and other mechanical and electromechanical airborne equipment, do not operate in high-temperature environments for extended periods. However, they are circulated with high-temperature media during actual operation. In high-temperature testing of such products, the highest ambient temperature specified in the standard is usually used. This does not take into account the impact of the high-temperature media on the product. If a high-temperature media is circulated under ambient conditions during the test, the media temperature will decrease under the stable temperature conditions specified in the test, which will also affect the product's test performance. Therefore, for such products, the medium temperature must be considered when formulating high-temperature test conditions. Summary of the Invention

[0004] To address the aforementioned problems, this application provides an environmental testing method that combines high-temperature storage and high-temperature operation tests, comprising:

[0005] Step (1): Determine the high-temperature operating temperature and high-temperature storage temperature based on the product type, installation location, and medium temperature;

[0006] Step (2): Combine the high-temperature working test procedure and the high-temperature storage test procedure into a continuous test process;

[0007] Step (3): Complete the high-temperature working test and high-temperature storage test in sequence according to the merged test procedure.

[0008] Preferably, the specific method for determining the experimental conditions in step (1) includes:

[0009] When the actual operating temperature of the product is lower than the medium temperature, the medium temperature is taken as the high-temperature operating temperature.

[0010] When the actual working environment temperature of the product is not lower than the medium temperature, the temperature specified in the standard shall be used as the high-temperature test condition.

[0011] Preferably, the two test periods, high-temperature storage and high-temperature operation, include:

[0012] The high-temperature working test time includes the temperature stabilization time, the re-stabilization time after power-on, and the functional performance test time.

[0013] The high-temperature storage test time is the time for conducting the high-temperature storage test alone minus the time required for the high-temperature working test.

[0014] Preferably, step (1) further includes determining the temperature stabilization time:

[0015] Based on the product weight, refer to GJB 4.2 standard to determine the temperature stabilization time for the high-temperature test.

[0016] Preferably, the specific procedure for performing the experiment in step (3) includes:

[0017] Before the test, the product's functional performance was tested at room temperature;

[0018] After passing the product through a high-temperature medium, it is placed in an environmental test chamber.

[0019] The temperature is raised to the high-temperature operating temperature at the heating rate and maintained until the temperature stabilizes.

[0020] The product is powered on and its functional performance is tested under high-temperature operating conditions.

[0021] Lower the temperature to the high-temperature storage temperature and maintain the remaining storage time;

[0022] After the temperature returns to room temperature, the functional performance is tested.

[0023] Preferably, when the high-temperature operating temperature and the high-temperature storage temperature are inconsistent, specifically including:

[0024] T0-T1: The test chamber temperature rises to the high-temperature operating temperature;

[0025] T1-T2: The product is not in operation; maintain the operating temperature.

[0026] T2-T3: Product operation, maintaining operating temperature;

[0027] T3-T4: Maintain operating temperature and perform functional performance testing;

[0028] T4-T5: Temperature is reduced to the high-temperature storage temperature;

[0029] T5-T6: Maintain the remaining high-temperature storage time;

[0030] T6-T7: The temperature returns to room temperature and the final test is performed.

[0031] Preferably, when the high-temperature operating temperature is the same as the high-temperature storage temperature,

[0032] T0-T1: The test chamber temperature rises to the high-temperature operating temperature;

[0033] T1-T5: Maintain the operating temperature and sequentially perform product inactive, product operational, functional performance testing, and high-temperature storage.

[0034] T5-T6: The temperature returns to room temperature and the final test is performed.

[0035] Preferably, the method is applicable to mechanical and electromechanical airborne equipment, including valves, pipelines, and connectors.

[0036] A high-temperature environmental testing system for implementing the aforementioned environmental testing method that combines high-temperature storage and high-temperature operation tests, comprising:

[0037] Environmental test chambers are used to provide high-temperature environments;

[0038] A media supply system is used to introduce high-temperature media into the product.

[0039] Testing equipment is used for functional performance testing before, during, and after experiments.

[0040] The control system is used to control the rate of temperature change and the time nodes of each stage.

[0041] A computer-readable storage medium stores a computer program that, when executed by a processor, implements the method described herein. This application can shorten experimental time. Attached Figure Description

[0042] Figure 1 Applicable to combined test procedures with different high-temperature operating temperatures and high-temperature storage temperatures;

[0043] Figure 2 This is applicable to combined test procedures where the operating temperature and storage temperature are the same. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only a part of the embodiments of this application, not all of them. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings. First, as described in the invention summary, the product type and working mode are determined, and further, the high-temperature working temperature, high-temperature storage temperature, temperature stabilization time, working test time, and storage test time are determined. Next, using... Figure 1 Let's take an example to illustrate:

[0045] Assuming the test product is a valve installed on a high-temperature pipeline to control gas flow, and the temperature of the high-temperature gas introduced is 120℃, then 120℃ is taken as the high-temperature operating temperature. Referring to relevant domestic and international standards, its storage temperature is 70℃.

[0046] Determine the temperature stabilization time and the duration of the complete storage test;

[0047] The test procedures are combined, where T1 is the time required for the initial temperature of the test chamber to change to the high-temperature operating temperature, and the rate of temperature change is usually specified in the contract or technical agreement; T1~T2 is the time for the product to reach temperature stability, and the temperature stability time can be determined according to the method given in the invention; the product starts working at time T2 and reaches temperature stability again at time T3; T3~T4 is the time required for the product to carry out functional and performance tests under high-temperature operating conditions. After completing all the specified functional and performance tests, the product is powered off or disconnected from other energy sources and enters the storage state again; T4~T5 is the time to reduce the temperature to the high-temperature storage temperature according to the specified temperature change rate; T5~T6 is the remaining high-temperature storage time. The high-temperature storage test is completed at time T6, and T6~T7 is the time to return the temperature to the laboratory temperature according to the specified temperature change rate and conduct functional and performance tests again. The conclusion of whether the test is passed is given based on the test results before, during and after the test.

[0048] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An environmental testing method that combines high-temperature storage and high-temperature operation tests, characterized in that, include: Step (1): Determine the high-temperature operating temperature and high-temperature storage temperature based on the product type, installation location, and medium temperature; Step (2): Combine the high-temperature working test procedure and the high-temperature storage test procedure into a continuous test process; Step (3): Complete the high-temperature working test and high-temperature storage test in sequence according to the merged test procedure.

2. The environmental testing method for combining high-temperature storage and high-temperature operation tests as described in claim 1, characterized in that, The specific methods for determining the test conditions in step (1) include: When the actual operating temperature of the product is lower than the medium temperature, the medium temperature is taken as the high-temperature operating temperature. When the actual working environment temperature of the product is not lower than the medium temperature, the temperature specified in the standard shall be used as the high-temperature test condition.

3. The environmental testing method for combining high-temperature storage and high-temperature operation tests as described in claim 1, characterized in that, The two test periods, high-temperature storage and high-temperature operation, include: The high-temperature working test time includes the temperature stabilization time, the re-stabilization time after power-on, and the functional performance test time. The high-temperature storage test time is the time for conducting the high-temperature storage test alone minus the time required for the high-temperature working test.

4. The environmental testing method for combining high-temperature storage and high-temperature operation tests as described in claim 3, characterized in that, Step (1) also includes determining the temperature stabilization time: Based on the product weight, refer to GJB 4.2 standard to determine the temperature stabilization time for the high-temperature test.

5. The environmental testing method for combining high-temperature storage and high-temperature operation tests as described in claim 1, characterized in that, The specific procedures for conducting the experiment in step (3) include: Before the test, the product's functional performance was tested at room temperature; After passing the product through a high-temperature medium, it is placed in an environmental test chamber. The temperature is raised to the high-temperature operating temperature at the heating rate and maintained until the temperature stabilizes. The product is powered on and its functional performance is tested under high-temperature operating conditions. Lower the temperature to the high-temperature storage temperature and maintain the remaining storage time; After the temperature returns to room temperature, the functional performance is tested.

6. The environmental testing method for combining high-temperature storage and high-temperature operation tests as described in claim 1, characterized in that, When the high-temperature operating temperature and the high-temperature storage temperature are inconsistent, specifically including: T0-T1: The test chamber temperature rises to the high-temperature operating temperature; T1-T2: The product is not in operation; maintain the operating temperature. T2-T3: Product operation, maintaining operating temperature; T3-T4: Maintain operating temperature and perform functional performance testing; T4-T5: Temperature is reduced to the high-temperature storage temperature; T5-T6: Maintain the remaining high-temperature storage time; T6-T7: The temperature returns to room temperature and the final test is performed.

7. The environmental testing method for combining high-temperature storage and high-temperature operation tests as described in claim 6, characterized in that, When the high-temperature operating temperature is the same as the high-temperature storage temperature T0-T1: The test chamber temperature rises to the high-temperature operating temperature; T1-T5: Maintain the operating temperature and sequentially perform product inactive, product operational, functional performance testing, and high-temperature storage. T5-T6: The temperature returns to room temperature and the final test is performed.

8. The environmental testing method for combining high-temperature storage and high-temperature operation tests as described in claim 1, characterized in that, The method is applicable to mechanical and electromechanical airborne equipment, including valves, pipelines, and connectors.

9. A high-temperature environment testing system, characterized in that, The environmental testing method for implementing the combined high-temperature storage and high-temperature operation tests as described in any one of claims 1-8 is characterized by comprising: Environmental test chambers are used to provide high-temperature environments; A media supply system is used to introduce high-temperature media into the product. Testing equipment used for functional performance testing before, during, and after testing; The control system is used to control the rate of temperature change and the time nodes of each stage.

10. A computer-readable storage medium storing a computer program that, when executed by a processor, implements the method as claimed in any one of claims 1-8.

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