Multi-degree-of-freedom dynamic oil mass measurement and verification system

Abstract

The utility model provides a multi-degree-of-freedom dynamic fuel quantity measurement and verification system, and relates to the technical field of aircraft design. The device comprises an oil source, an oil inlet pipeline, an oil return pipeline, an oil return port, a three-way pipeline, an oil outlet pipeline, a ventilation pipeline and a test bench, and indirect data verification of an oil inlet flow meter and an oil return flow meter is realized by arranging an oil quantity measuring and weighing platform; the oil inlet branch pipe, the oil return branch pipe and the ventilation branch pipe are arranged and matched with the manual oil inlet adjusting valve, the oil return ball valve and the manual ventilation valve, and it is guaranteed that when blockage occurs, normal operation of the system can be guaranteed by switching to the branch pipes; the experiment process is managed through the data acquisition and management device, the interior of the used oil tank body is arranged through a keel frame structure, and simulation of the heterosexual oil tank can be achieved at low cost in cooperation with the skin. And the circulation of internal oil is ensured through the through-flow holes. The verification system is simple in structure, and has a data verification capability and a certain fault redundancy capability.

Description

Technical Field

[0001] This utility model relates to the field of aircraft design technology, and in particular to a multi-degree-of-freedom dynamic fuel quantity measurement and verification system. Background Technology

[0002] During aircraft design and manufacturing, we need to conduct simulation tests to verify various system modules. In fact, computer simulation tests can quickly obtain some data, but because they lack objective and realistic data support, we also need to conduct physical simulation tests to obtain more realistic and effective test data.

[0003] In aircraft structures (especially high-speed aircraft), the aircraft fuel tank is a weak point in its design, requiring simulation testing and verification. However, pure software simulation cannot meet our design requirements, while existing physical simulation methods have problems such as the inability to perform multi-degree-of-freedom adjustments, the inability to accurately measure fuel intake, and high hardware costs.

[0004] Therefore, a multi-degree-of-freedom dynamic oil quantity measurement and verification system is needed to solve the above-mentioned technical problems. Utility Model Content

[0005] To address the aforementioned technical problems, this embodiment provides a multi-degree-of-freedom dynamic oil quantity measurement and verification system, including an oil source, an oil inlet pipeline, an oil return pipeline, an oil return port, a tee pipeline, an oil outlet pipeline, a vent pipeline, and a test bench; wherein,

[0006] The oil source is used to supply oil under positive pressure, and the oil return port is used to draw oil under negative pressure; the test bench includes a six-degree-of-freedom adjustment platform, an oil quantity measurement and weighing platform, and an oil tank.

[0007] The three-way pipeline includes a three-way main oil pipe, a three-way inlet oil pipe, a three-way return oil pipe, and a three-way ball valve; wherein, one end of the three-way main oil pipe is connected to the oil source through the inlet oil pipe and to the return oil port through the return oil pipe; the other end of the three-way main oil pipe is connected to one port of the three-way ball valve, and the other two ports of the three-way ball valve are connected to one end of the three-way inlet oil pipe and the three-way return oil pipe, respectively;

[0008] The fuel tank is placed on a six-degree-of-freedom adjustment platform and includes a fuel tank body and a fuel tank inlet, a fuel tank return port, a fuel tank outlet, and a fuel tank vent. The fuel tank inlet is connected to the other end of a three-way fuel inlet pipe, the fuel tank return port is connected to the other end of a three-way fuel return pipe, the fuel tank outlet is connected to one end of a fuel outlet pipe, and the fuel tank vent is connected to one end of a vent pipe.

[0009] The oil volume measuring and weighing platform is placed at a low level below the six-degree-of-freedom adjustment platform and includes an oil drum and an electronic scale; wherein, the other end of the oil outlet pipe is placed inside the oil drum, and the oil drum is placed on the weighing platform of the electronic scale.

[0010] As a further solution, the oil inlet pipeline includes a main oil inlet pipe, and a first oil inlet pressure gauge, an oil inlet electronic control valve, a second oil inlet pressure gauge, and an oil inlet flow meter are sequentially installed on the oil inlet pipeline; wherein, an oil inlet branch pipe is installed between the two ends of the oil inlet electronic control valve, and a manual oil inlet control valve is installed on the oil inlet branch pipe.

[0011] As a further solution, the three-way return oil pipe is equipped with a return oil electrically controlled regulating valve. The return oil pipeline includes a main return oil pipe, a return oil flow meter installed on the main return oil pipe, and a return oil branch pipe installed on the main return oil pipe; wherein, a return oil ball valve is installed on the return oil branch pipe.

[0012] As a further solution, an electronically controlled oil outlet regulating valve and a manual oil outlet valve are sequentially installed on the oil outlet pipeline.

[0013] As a further solution, the ventilation pipeline includes a main ventilation pipe and a branch ventilation pipe; wherein, a balloon valve is provided on the main ventilation pipe, the branch ventilation pipe is installed between the two ends of the balloon valve, and a manual ventilation valve is provided on the branch ventilation pipe.

[0014] As a further solution, the interior of the fuel tank body is constructed using a keel frame structure, and the keel frame structure is sealed and wrapped with a skin around its perimeter; wherein, the keel frame structure is provided with several flow holes.

[0015] As a further solution, multiple flange interfaces are provided at different heights on the top of the oil tank body; wherein, the flange interfaces can be used to install pressure sensors, oil level sensors, temperature sensors, density sensors and vent valves.

[0016] As a further solution, a data acquisition and management device is also included; wherein, the data acquisition and management device includes a multi-channel RS458 communication card, a multi-channel discrete I / O card, a multi-function acquisition card, and a signal conditioning box;

[0017] The multi-channel RS458 communication card is electrically connected to the electronic scale and the six-degree-of-freedom adjustment platform, respectively; the multi-channel discrete I / O card and the multi-function acquisition card are electrically connected to the signal conditioning box, respectively; and the signal conditioning box is electrically connected to each ball valve, each electrically controlled regulating valve and each sensor, respectively.

[0018] The multi-channel RS458 communication card, multi-channel discrete I / O card, and multi-function acquisition card are also electrically connected to the host computer via a PCI / PCIe bus.

[0019] As a further solution, the signal conditioning box includes an AD signal conditioning module, a DA signal conditioning module, an I / O signal conditioning module, and a programmable power supply. The AD and DA signal conditioning modules are electrically connected to each ball valve, each electrically controlled regulating valve, and a multi-function data acquisition card, respectively. The I / O signal conditioning module is electrically connected to a pressure sensor, an oil level sensor, a temperature sensor, a density sensor, and a multi-channel discrete I / O card, respectively. The programmable power supply is electrically connected to the AD, DA, and I / O signal conditioning modules, and a multi-channel RS458 communication card, respectively.

[0020] As a further solution, an explosion-proof camera is also installed at the test bench site. The explosion-proof camera is electrically connected to a hard disk recorder installed at the rear end, and the hard disk recorder is electrically connected to a host computer.

[0021] Compared with the prior art, the multi-degree-of-freedom dynamic oil quantity measurement and verification system provided by this utility model has the following advantages:

[0022] 1. The verification system of this utility model has a simple structure, including only an oil source, an oil inlet pipeline, an oil return pipeline, an oil return port, a three-way pipeline, an oil outlet pipeline, a vent pipeline, and a test bench. Indirect data verification between the oil inlet flow meter and the oil return flow meter can be achieved by setting up an oil quantity measurement and weighing platform.

[0023] 2. This utility model, by setting up an oil inlet branch pipe, an oil return branch pipe, and a vent branch pipe, and cooperating with a manual oil inlet regulating valve, an oil return ball valve, and a manual vent valve, ensures that in the event of a blockage, the system can be switched to the branch pipe to ensure normal operation.

[0024] 3. This utility model also manages the experimental process through a data acquisition and management device, manages the electronic scale and the six-degree-of-freedom adjustment platform through a multi-channel RS458 communication card, manages the signal data of each ball valve, each electrically controlled regulating valve and each sensor through a signal conditioning box, and sends the discrete I / O signals to the multi-channel discrete I / O card for processing, and sends the analog input and output signals to the multi-functional acquisition card for processing.

[0025] 4. The internal structure of the fuel tank body used in this utility model is designed with a keel frame structure, and with the addition of a skin, the simulation of an irregular fuel tank can be achieved at low cost; and several flow holes are opened on the keel frame structure to ensure the flow of fuel inside. Attached Figure Description

[0026] Figure 1This is a schematic diagram of a multi-degree-of-freedom dynamic oil quantity measurement and verification system provided by the present invention;

[0027] Figure 2 This is a schematic diagram of the fuel tank body structure provided by the present invention;

[0028] Figure 3 This is a schematic diagram of the fuel tank structure provided by the present invention;

[0029] Figure 4 A schematic diagram of the data acquisition and management device provided by the present invention;

[0030] The attached diagrams are labeled as follows: 1. Oil source; 11. First inlet pressure gauge; 12. Inlet electrically controlled regulating valve; 13. Second inlet pressure gauge; 14. Inlet flow meter; 15. Manual inlet regulating valve; 21. Three-way main oil pipe; 22. Three-way ball valve; 23. Three-way inlet pipe; 24. Three-way return pipe; 25. Return electrically controlled regulating valve; 31. Manual vent valve; 32. Vent ball valve; 33. Flange interface; 41. Outlet electrically controlled regulating valve; 42. Manual outlet valve; 43. Weighing platform; 51. Return main pipe; 52. Return ball valve; 5. Return port; 6. Explosion-proof camera. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Please see Figure 1 This embodiment provides a multi-degree-of-freedom dynamic oil quantity measurement and verification system, including an oil source 1, an oil inlet pipeline, an oil return pipeline, an oil return port 5, a tee pipeline, an oil outlet pipeline, a vent pipeline, and a test bench; wherein,

[0033] The oil source 1 is used to supply oil under positive pressure, and the oil return port 5 is used to draw oil under negative pressure; the test bench includes a six-degree-of-freedom adjustment platform, an oil quantity measurement and weighing platform 43, and an oil tank.

[0034] The three-way pipeline includes a three-way main oil pipe 21, a three-way inlet oil pipe 23, a three-way return oil pipe 24, and a three-way ball valve 22; wherein, one end of the three-way main oil pipe 21 is connected to the oil source 1 through the inlet oil pipe and to the return oil port 5 through the return oil pipe; the other end of the three-way main oil pipe 21 is connected to one port of the three-way ball valve 22), and the other two ports of the three-way ball valve 22 are connected to one end of the three-way inlet oil pipe 23 and the three-way return oil pipe 24, respectively;

[0035] The fuel tank is placed on a six-degree-of-freedom adjustment platform and includes a fuel tank body and a fuel tank inlet, a fuel tank return port 5, a fuel tank outlet, and a fuel tank vent. The fuel tank inlet is connected to the other end of a three-way fuel inlet pipe 23, and the fuel tank return port 5 is connected to the other end of a three-way fuel return pipe 24. The fuel tank outlet is connected to one end of a fuel outlet pipe, and the fuel tank vent is connected to one end of a vent pipe.

[0036] The oil volume measuring and weighing platform 43 is placed at a low level below the six-degree-of-freedom adjustment platform and includes an oil drum and an electronic scale; wherein, the other end of the oil outlet pipe is placed in the inner cavity of the oil drum, and the oil drum is placed on the weighing platform 43 of the electronic scale.

[0037] It should be noted that during the aircraft design process, it is necessary to perform multi-degree-of-freedom dynamic fuel quantity measurement and verification of the fuel tank. Traditional large-scale digital simulation methods cannot obtain real and reliable data, while existing physical simulation methods have problems such as the inability to perform multi-degree-of-freedom adjustments, the inability to accurately measure the fuel quantity, and high hardware costs.

[0038] Therefore, in this embodiment, when performing multi-degree-of-freedom dynamic oil quantity measurement verification, firstly, we obtain oil through oil source 1. Oil source 1 usually injects oil by applying positive pressure. The oil inlet pipeline opens the oil inlet electronic control regulating valve (12). The oil pressure at both ends of the oil inlet electronic control regulating valve (12) is monitored in real time by the first oil inlet pressure gauge 11 and the second oil inlet pressure gauge 13. The oil injection volume is obtained by the oil inlet flow meter 14. The three-way main oil pipe 21 and the three-way oil inlet pipe 23 are connected by the three-way ball valve 22, thereby realizing the injection of oil into the oil tank at a constant speed and quantity.

[0039] Then, we open the venting valve 32 of the venting pipe to connect the venting main pipe to the oil tank, thereby maintaining the pressure balance inside the oil tank; after the oil is injected, we close the venting valve 32, dynamically adjust the multiple degrees of freedom through the six-degree-of-freedom adjustment platform, and obtain various test data at different liquid levels through the pressure sensors, oil level sensors, temperature sensors, and density sensors set at different heights above the oil tank body.

[0040] Next, we open the vent valve 32 of the vent pipe to connect the vent main pipe to the oil tank to maintain the pressure balance inside the oil tank. Then, we inject the oil into the oil quantity measuring and weighing platform 43 through the oil outlet pipe. We weigh the oil through the oil quantity measuring and weighing platform 43 to directly obtain the exact amount of oil injected. The oil inlet flow meter 14 is an indirect sensor to obtain data. The exact amount injected can verify whether the indirect data of the oil inlet flow meter 14 is accurate, thereby ensuring the reliability of the experimental data.

[0041] Finally, we close the venting ball valve 32 of the venting line, connect the three-way main oil pipe 21 and the three-way return oil pipe 24 through the three-way ball valve 22, and open the return oil electronic control regulating valve 25; the return oil port 5 draws in oil under negative pressure, and the internal negative pressure draws the oil into the oil tank and through the return oil pipe into the return oil port 5. We obtain the return oil volume through the return oil flow meter until the return oil volume reaches the set value, and the process is complete; in addition, the return oil flow meter can also verify the accuracy of the indirect data of the return oil flow meter by completely releasing the oil and comparing it with the exact injection volume.

[0042] The verification system provided in this embodiment has a simple structure. It can achieve indirect data verification between the oil inlet flow meter 14 and the oil return flow meter by simply setting up the oil quantity measurement and weighing platform 43. In addition, by setting up the oil inlet branch pipe, the oil return branch pipe, and the vent branch pipe, and cooperating with the manual oil inlet regulating valve 15, the oil return ball valve 52, and the manual vent valve 31, it can be ensured that the system can operate normally by switching to the branch pipe when a blockage occurs.

[0043] Because existing fuel tank structures often have irregular, non-standard parts and curved surfaces, they need to be adapted to the internal structure layout of the aircraft. Therefore, the internal structure of the fuel tank body used in this embodiment is set by a keel frame structure, and with the skin, the simulation of irregular fuel tanks can be realized at low cost. Several flow holes are opened on the keel frame structure to ensure the flow of fuel inside.

[0044] In addition, this system also uses, for example Figure 4 The data acquisition and management device shown manages the experimental process. It manages the electronic scale and the six-degree-of-freedom adjustment platform through a multi-channel RS458 communication card, and manages the signal data of each ball valve, each electrically controlled regulating valve, and each sensor through a signal conditioning box. It sends the discrete I / O signals to the multi-channel discrete I / O card for processing, and sends the analog input and output signals to the multi-function acquisition card for processing. The multi-channel RS458 communication card, the multi-channel discrete I / O card, and the multi-function acquisition card provide the information to the host computer for further processing through the PCI / PCIe bus. The entire experimental process is monitored by an explosion-proof camera 6 and a hard disk burner.

[0045] The above embodiments only illustrate preferred implementation methods, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A multi-degree-of-freedom dynamic oil quantity measurement and verification system, characterized in that, This includes an oil source (1), an oil inlet pipeline, an oil return pipeline, an oil return port (5), a tee pipeline, an oil outlet pipeline, a vent pipeline, and a test bench; among which, The oil source (1) is used to provide oil under positive pressure, and the oil return port (5) is used to draw oil under negative pressure; the test bench includes a six-degree-of-freedom adjustment platform, an oil quantity measurement and weighing platform (43), and an oil tank; The three-way pipeline includes a three-way main oil pipe (21), a three-way inlet oil pipe (23), a three-way return oil pipe (24), and a three-way ball valve (22); wherein, one end of the three-way main oil pipe (21) is connected to the oil source (1) through the inlet oil pipe and to the return oil port (5) through the return oil pipe; the other end of the three-way main oil pipe (21) is connected to one port of the three-way ball valve (22), and the other two ports of the three-way ball valve (22) are connected to one end of the three-way inlet oil pipe (23) and the three-way return oil pipe (24), respectively; The fuel tank is placed on a six-degree-of-freedom adjustment platform and includes a fuel tank body and a fuel tank inlet, a fuel tank return port (5), a fuel tank outlet, and a fuel tank vent. The fuel tank inlet is connected to the other end of a three-way fuel inlet pipe (23), the fuel tank return port (5) is connected to the other end of a three-way fuel return pipe (24), the fuel tank outlet is connected to one end of an outlet pipe, and the fuel tank vent is connected to one end of a vent pipe. The oil volume measuring and weighing platform (43) is placed at a low level below the six-degree-of-freedom adjustment platform, and includes an oil drum and an electronic scale; wherein, the other end of the oil outlet pipe is placed in the inner cavity of the oil drum, and the oil drum is placed on the weighing platform (43) of the electronic scale.

2. The multi-degree-of-freedom dynamic oil quantity measurement and verification system according to claim 1, characterized in that, The oil inlet pipeline includes a main oil inlet pipe, and a first oil inlet pressure gauge (11), an oil inlet electronic control regulating valve (12), a second oil inlet pressure gauge (13), and an oil inlet flow meter (14) are sequentially installed on the oil inlet pipeline; wherein, an oil inlet branch pipe is installed between the two ends of the oil inlet electronic control regulating valve (12), and a manual oil inlet regulating valve (15) is installed on the oil inlet branch pipe.

3. The multi-degree-of-freedom dynamic oil quantity measurement and verification system according to claim 1, characterized in that, The three-way return oil pipe (24) is equipped with a return oil electrically controlled regulating valve (25). The return oil pipeline includes a return oil main pipe (51), a return oil flow meter installed on the return oil main pipe (51), and a return oil branch pipe installed on the return oil main pipe (51). The return oil branch pipe is equipped with a return oil ball valve (52).

4. The multi-degree-of-freedom dynamic oil quantity measurement and verification system according to claim 1, characterized in that, The oil outlet pipeline is sequentially equipped with an oil outlet electronic control regulating valve (41) and a manual oil outlet valve (42).

5. The multi-degree-of-freedom dynamic oil quantity measurement and verification system according to claim 1, characterized in that, The ventilation pipeline includes a main ventilation pipe and a branch ventilation pipe; wherein, a balloon valve (32) is provided on the main ventilation pipe, the branch ventilation pipe is installed between the two ends of the balloon valve (32), and a manual ventilation valve (31) is provided on the branch ventilation pipe.

6. The multi-degree-of-freedom dynamic oil quantity measurement and verification system according to claim 1, characterized in that, The interior of the fuel tank body is constructed using a keel frame structure, and the keel frame structure is sealed and wrapped with a skin around its perimeter; the keel frame structure has several flow holes.

7. The multi-degree-of-freedom dynamic oil quantity measurement and verification system according to claim 1, characterized in that, The oil tank body is also provided with multiple flange interfaces (33) at different heights on the top; wherein the flange interfaces (33) can be used to install pressure sensors, oil level sensors, temperature sensors, density sensors and vent valves.

8. A multi-degree-of-freedom dynamic oil quantity measurement and verification system according to any one of claims 1, 2, 3, 4, 5, or 7, characterized in that, It also includes a data acquisition and management device; wherein, the data acquisition and management device includes a multi-channel RS458 communication card, a multi-channel discrete I / O card, a multi-function acquisition card, and a signal conditioning box; The multi-channel RS458 communication card is electrically connected to the electronic scale and the six-degree-of-freedom adjustment platform, respectively; the multi-channel discrete I / O card and the multi-function acquisition card are electrically connected to the signal conditioning box, respectively; and the signal conditioning box is electrically connected to each ball valve, each electrically controlled regulating valve and each sensor, respectively. The multi-channel RS458 communication card, multi-channel discrete I / O card, and multi-function acquisition card are also electrically connected to the host computer via a PCI / PCIe bus.

9. The multi-degree-of-freedom dynamic oil quantity measurement and verification system according to claim 8, characterized in that, The signal conditioning box includes an AD signal conditioning module, a DA signal conditioning module, an I / O signal conditioning module, and a programmable power supply. The AD and DA signal conditioning modules are electrically connected to each ball valve, each electrically controlled regulating valve, and a multi-function data acquisition card, respectively. The I / O signal conditioning module is electrically connected to a pressure sensor, an oil level sensor, a temperature sensor, a density sensor, and a multi-channel discrete I / O card, respectively. The programmable power supply is electrically connected to the AD, DA, and I / O signal conditioning modules, and a multi-channel RS458 communication card, respectively.

10. The multi-degree-of-freedom dynamic oil quantity measurement and verification system according to claim 8, characterized in that, An explosion-proof camera (6) is also installed at the test bench site. The explosion-proof camera (6) is electrically connected to the hard disk recorder installed at the rear end. The hard disk recorder is electrically connected to the host computer.

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