Test bench capable of rapidly switching working conditions
By designing a test bench that can quickly switch working conditions and using two air source branches and a controller, a comprehensive verification of the airborne environmental control system was achieved, solving the problem that existing test benches could not simulate sudden changes in air bleed conditions, and achieving the effect of quickly reaching the required flow, temperature and pressure conditions.
Patent Information
- Application Number
- CN202423069721.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-12
AI Technical Summary
The existing test bench is unable to simulate the sudden changes in the air inlet conditions on the aircraft, resulting in insufficient verification of the environmental control system performance.
A test bench with fast switching working conditions was designed. By connecting two gas source branches in parallel and combining a reversing valve, a heating device, a flow meter and a temperature and pressure sensor, the sudden change of air induction conditions can be simulated. The flow direction can be quickly switched and the flow, temperature and pressure can be precisely controlled through a controller.
It achieves comprehensive verification of the airborne environmental control system, can quickly achieve the required flow, temperature and pressure conditions, and supports the performance test of the environmental control system under sudden air bleed conditions.
Smart Images
Figure CN223485526U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing technology, and in particular to a test bench with rapid switching of operating conditions. Background Technology
[0002] When validating an aircraft's airborne environmental control system, it is necessary to recreate and verify the actual bleed air environment on board. Usually, steady-state tests are conducted to verify the system's performance. However, the dynamic bleed air conditions on board are not fully verified. The test conditions are usually simplified, which does not easily expose the problems that exist in the real environment. However, the impact of sudden bleed air conditions on the performance of the environmental control system should not be underestimated. Therefore, it is essential to verify the system under sudden bleed air conditions.
[0003] There is a problem with existing test bench solutions: there is no test bench solution with rapid switching of operating conditions to simulate sudden changes in bleed air conditions on the machine. Utility Model Content
[0004] The purpose of this invention is to provide a test bench with rapid switching of operating conditions. This invention can simulate sudden changes in bleed air conditions, providing conditions for the comprehensive verification of airborne environmental control systems.
[0005] The technical solution of this utility model is: a test bench with rapid switching of operating conditions, including two gas source branches, which are connected in parallel and connected to the test object; one gas source branch consists of a high-pressure gas source, a flow meter, a heating device, and a reversing valve connected in sequence, and the other gas source branch consists of two high-pressure gas sources, two flow meters, two heating devices, and two reversing valves connected in sequence; the first interface of the first and second reversing valves are connected to the inlet end of the test object; the second interface of the first and second reversing valves are connected to the heating device and the heating device, respectively.
[0006] In the aforementioned test bench with rapid switching of operating conditions, the third port of one reversing valve is connected to one throttle valve.
[0007] In the aforementioned test bench with rapid switching of operating conditions, a temperature and pressure sensor is installed between one reversing valve and one throttle valve.
[0008] In the aforementioned test bench with rapid switching of operating conditions, the third port of the two-way reversing valve is connected to the two-way throttle valve.
[0009] In the aforementioned test bench with rapid switching of operating conditions, two temperature and pressure sensors are installed between the two-way reversing valve and the two-way throttle valve.
[0010] In the aforementioned test bench with rapid switching of operating conditions, the outlet end of the test object is connected to the throttle valve of the test path.
[0011] In the aforementioned test bench with rapid switching of operating conditions, the test subject is equipped with a test path temperature and pressure sensor at the inlet end.
[0012] The advantages of this utility model are:
[0013] 1) Capable of simulating sudden bleed air conditions on board and supporting comprehensive verification of the supporting system;
[0014] 2) The valve opening is pre-calibrated under the third flow direction so that the test subject can quickly reach the required flow rate, temperature and pressure conditions when the test begins;
[0015] 3) The controller's programmability makes it easier to implement cyclical pressure and temperature changes;
[0016] This test bench solution can be modified from a commonly used environmental control simulation test chamber without the need for reconstruction; only the addition of electric valves and controllers is required. Attached Figure Description
[0017] Figure 1 It is a structural diagram of the present utility model. Detailed Implementation
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.
[0019] Example 1. A test bench with rapid switching of operating conditions, see [link to example]. Figure 1 It includes two gas source branches, which are connected in parallel and connected to the test subject 14. One gas source branch consists of a high-pressure gas source 1, a flow meter 2, a heating device 3, and a reversing valve 4 connected in sequence. The other gas source branch consists of two high-pressure gas sources 7, two flow meters 8, two heating devices 9, and two reversing valves 10 connected in sequence. The first interface of the reversing valve 4 and the reversing valve 10 are both connected to the inlet end of the test subject 14. The second interface of the reversing valve 4 and the reversing valve 10 are connected to the heating device 3 and the heating device 9, respectively.
[0020] The third port of the aforementioned reversing valve 4 is connected to the throttle valve 6.
[0021] A temperature and pressure sensor 5 is provided between the aforementioned reversing valve 4 and throttle valve 6.
[0022] The third port of the aforementioned two-way directional valve 10 is connected to the two-way throttle valve 12.
[0023] Two temperature and pressure sensors 11 are provided between the aforementioned two-way reversing valve 10 and two-way throttle valve 12.
[0024] The outlet end of the aforementioned test subject 14 is connected to the test path throttle valve 15.
[0025] The aforementioned subject 14 is equipped with a subject road temperature and pressure sensor 13 at the inlet end.
[0026] The aforementioned one-way reversing valve 4, two-way reversing valve 10, one-way throttle valve 6, two-way throttle valve 12, and test-way throttle valve 15 are all electrically connected to the controller 16.
[0027] The test bench has two gas sources with three flow directions. The components for the first flow direction are labeled as follows: 1→2→3→4→13→14→15, 7→8→9→10→11→12. The components for the second flow direction are labeled as follows: 7→8→9→10→13→14→15, 1→2→3→4→5→6. The components for the third flow direction are labeled as follows: 7→8→9→10→11→12, 1→2→3→4→5→6. In the third flow direction, no gas flows through the test path. This is mainly used to adjust the first throttle valve 6 and the second throttle valve 12 before the test to meet the flow requirements of the test.
[0028] Furthermore, the first reversing valve 4 can adjust the airflow from 3 to output to 5 or 13, and the second reversing valve 10 can adjust the airflow from 8 to output to 11 or 13. The two reversing valves operate simultaneously to switch the flow direction of the two air sources between the first and second types.
[0029] Specifically, it is required that the first-way reversing valve 4 and the second-way reversing valve 10 have remote control functions and the operation time should be within 3 seconds. When the pressure difference between the two air sources is too large, a one-way valve can be added to the pipeline between 4→13 and 10→13 to prevent the backflow of low-pressure airflow during the switching process from damaging the heating device.
[0030] Furthermore, the first-path throttle valve 6, the second-path throttle valve 12, and the throttle valve 15 of the test path should be completely identical valves. The throttle valve 15 of the test path should be adjusted to the throttle valve opening of the corresponding gas source discharge path before switching the gas source flow direction.
[0031] Furthermore, all the throttle valves mentioned above can provide feedback on their opening degree, all the directional valves mentioned above can provide feedback on their position, and all the sensors and valves mentioned above can transmit signals to the controller 16.
[0032] Furthermore, the controller 3 is programmable, allowing it to switch the flow direction either according to program settings or manually.
[0033] Furthermore, there can be more than two gas sources. When there are more gas sources, it is necessary to ensure that each gas source is connected in parallel and that each is equipped with a reversing valve and a corresponding gas source discharge path.
Claims
1. A test bench with rapid switching of operating conditions, characterized in that, It includes two gas source branches, which are connected in parallel and connected to the test subject (14); one gas source branch consists of a high-pressure gas source (1), a flow meter (2), a heating device (3), and a reversing valve (4) connected in sequence; the other gas source branch consists of two high-pressure gas sources (7), two flow meters (8), two heating devices (9), and two reversing valves (10) connected in sequence; the first interface of the reversing valve (4) and the reversing valve (10) are connected to the inlet end of the test subject (14); the second interface of the reversing valve (4) and the reversing valve (10) are connected to the heating device (3) and the heating device (9) respectively.
2. The test bench with rapid switching of operating conditions according to claim 1, characterized in that: The third port of one reversing valve (4) is connected to one throttle valve (6).
3. The test bench with rapid switching of operating conditions according to claim 2, characterized in that: A temperature and pressure sensor (5) is provided between one reversing valve (4) and one throttle valve (6).
4. The test bench with rapid switching of operating conditions according to claim 1, characterized in that: The third port of the two-way reversing valve (10) is connected to the two-way throttle valve (12).
5. The test bench with rapid switching of operating conditions according to claim 4, characterized in that: Two temperature and pressure sensors (11) are provided between the two-way reversing valve (10) and the two-way throttle valve (12).
6. The test bench with rapid switching of operating conditions according to claim 1, characterized in that: The outlet of the test object (14) is connected to the throttle valve (15) of the test path.
7. The test bench with rapid switching of operating conditions according to claim 1, characterized in that: The test subject (14) is equipped with a test road temperature and pressure sensor (13) at the inlet end.