Flowmeter oil supply test system

Abstract

The invention relates to the technical field of instruments and meters, in particular to a flow meter oil supply test system which comprises a circulating heat conduction piece, a flow meter oil supply test device, a flow meter oil supply test device and a flow meter oil supply test device, the circulating heat conduction piece comprises a cold-hot machine, an inner heat exchange piece and an outer heat exchange piece, and the inner heat exchange piece and the outer heat exchange piece are connected to the cold-hot machine in parallel; the fuel oil part comprises an oil supply part, a flow testing part, a pressure stabilizing part and an oil return part, the oil supply part is arranged outside the inner heat exchange part, so that fuel oil in the oil supply part can be in heat transfer with the inner heat exchange part, and the flow testing part is in through connection with the oil supply part through the outer heat exchange part, so that the fuel oil at the preset temperature is used for carrying out an oil supply test on the turbine flowmeter to be tested; the pressure stabilizing part is in through connection with the flow testing part so as to stabilize the fuel pressure in the test process, and the fuel return part is in through connection with the pressure stabilizing part and the fuel supply part so as to enable the fuel to flow back to the fuel supply part. The test coverage and authenticity can be remarkably improved, the test precision is high, the system structure and reliability are optimized, and the safety and environmental protection performance of the test process are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of testing and measuring instruments, and in particular to a flow meter oil supply test system. Background Technology

[0002] As a core measuring component in a fuel supply system, the flow meter's accuracy, stability, and reliability directly affect fuel supply efficiency, equipment operational safety, and energy consumption control. In aerospace, marine propulsion, generator sets, and precision industrial combustion systems, high-precision, high-dynamic-response measurement and regulation of fuel flow is of paramount engineering importance. To ensure that the flow meter's performance meets design requirements in practical applications, it must undergo rigorous testing and calibration using a fuel supply test system simulating real-world operating conditions before installation.

[0003] Currently, common flow meter testing methods mostly employ the standard meter method or the mass-time method, conducted under laboratory conditions. However, existing oil supply testing systems typically have the following limitations: 1. Limited operating condition simulation capabilities: Many test systems can only perform tests under relatively simple flow, pressure, and temperature parameters, making it difficult to reproduce the complex dynamic operating conditions existing in actual oil supply systems, such as rapid flow step changes, pressure pulsations, and transient oil temperature changes. This results in insufficient performance evaluation of flow meters in terms of dynamic characteristics and environmental adaptability.

[0004] 2. Low system integration and automation: Traditional test benches are often assembled from scattered pumps, oil tanks, heaters, pressure regulating valves and data acquisition instruments. The system piping is complex, occupies a large space, and the coordination and control of each unit is difficult.

[0005] 3. Insufficient calibration accuracy and traceability chain integrity: Some systems use pressure and temperature sensors and standard flow meters as references with limited accuracy, or lack effective and convenient traceability chains with higher-level national metrological standards. Furthermore, improper system piping design may generate eddies, bubbles, or slug flows, affecting flow field stability and introducing additional measurement uncertainties, thus reducing calibration reliability.

[0006] 4. Inadequate safety and environmental considerations: Fuel testing involves flammable media, and some existing systems are poorly designed in terms of leak monitoring, spill protection, electrical explosion protection, and exhaust gas (oil mist) treatment, posing safety hazards. Furthermore, the inadequate fuel circulation and purification functions of these systems can easily lead to fuel deterioration, increase testing costs, and contradict the principles of green and environmentally friendly testing.

[0007] Therefore, there is an urgent need to develop a flow meter oil supply test system that is highly integrated, highly automated, covers a wide range of operating conditions, has high calibration accuracy, and is safe and environmentally friendly. This system can provide a high-confidence performance testing platform for turbine flow meters throughout their entire lifecycle, from R&D verification and factory inspection to periodic calibration, overcoming the shortcomings of existing technologies and meeting the ever-increasing industrial testing demands. Summary of the Invention

[0008] To address the technical problems existing in the prior art, embodiments of the present invention provide a flow meter oil supply test system. The technical solution is as follows: A flow meter oil supply test system, comprising: A circulating heat transfer component, comprising a chiller / heater, an internal heat exchanger, and an external heat exchanger, wherein the internal heat exchanger and the external heat exchanger are connected in parallel and through the chiller / heater. A fuel supply component, connected to the circulating heat-conducting component, includes a fuel supply component, a flow test component, a pressure stabilizer component, and a fuel return component. The fuel supply component is disposed outside the inner heat exchanger component, enabling the fuel in the fuel supply component to transfer heat with the inner heat exchanger component. The flow test component is connected to the fuel supply component through the outer heat exchanger component to conduct a fuel supply test on the turbine flow meter under test using fuel at a predetermined temperature. The pressure stabilizer component is connected to the flow test component to stabilize the fuel pressure during the test. The fuel return component is connected to both the pressure stabilizer component and the fuel supply component to return the fuel to the fuel supply component.

[0009] Preferably, the external heat exchanger includes a first pipeline, a first switching valve, and an external heat exchanger. One end of the first pipeline is connected to the outlet of the chiller / heater, and the other end is connected to the inlet of the chiller / heater. The first switching valve and the external heat exchanger are both installed on the first pipeline. The internal heat exchanger includes a second pipeline, a second switching valve, and an internal heat exchanger. One end of the second pipeline is connected to the outlet of the chiller / heater, and the other end is connected to the inlet of the chiller / heater. The second switching valve and the internal heat exchanger are both installed on the second pipeline. The second pipeline is connected in parallel with the first pipeline.

[0010] Preferably, the oil supply component includes an oil tank, an oil supply power component, and a heating circulation component. The oil tank contains the internal heat exchanger. The oil supply power component is connected in communication with the oil tank. The heating circulation component is connected in communication with both the oil supply power component and the oil tank. The oil supply power component includes a third pipeline, a first filter, a third switching valve, and an oil pump. One end of the third pipeline is connected in communication with the oil tank. The first filter, the third switching valve, and the oil pump are all connected in communication with the third pipeline. The heating circulation component includes a fourth pipeline and a fourth switching valve. One end of the fourth pipeline is connected in communication with the other end of the third pipeline, and the other end is connected in communication with the bottom surface of the oil tank. The fourth switching valve is located on the fourth pipeline.

[0011] Preferably, the flow test component includes an oil inlet component, a first standard flow component, and a test flow component. The oil inlet component is connected in connection with the oil supply power component to receive the fuel delivered by the oil pump. The first standard flow component is connected in connection with the oil inlet component, and the test flow component is connected in connection with the first standard flow component to test the turbine flow meter.

[0012] Preferably, the oil inlet component includes a fifth pipeline, a fifth switching valve, a sixth pipeline, and a sixth switching valve. One end of the fifth pipeline is connected to the other end of the third pipeline, and the fifth pipeline is connected in series with the external heat exchanger. The fifth switching valve is installed on the fifth pipeline. One end of the sixth pipeline is connected to the other end of the third pipeline, and the sixth pipeline is connected in parallel with the fifth pipeline. The sixth switching valve is installed on the sixth pipeline. The first standard flow component includes a seventh pipeline, a first temperature sensor, a first pressure sensor, an eighth pipeline, and a seventh switching valve. The system comprises a first standard flow meter, a ninth pipeline, and an eighth switching valve. One end of the seventh pipeline is connected to the other ends of both the fifth and sixth pipelines. The first temperature sensor and the first pressure sensor are installed on the seventh pipeline. One end of the eighth pipeline is connected to the other end of the seventh pipeline. The seventh switching valve and the first standard flow meter are both installed on the eighth pipeline. One end of the ninth pipeline is connected to the other end of the seventh pipeline. The ninth pipeline is connected in parallel with the eighth pipeline. The eighth switching valve is installed on the ninth pipeline.

[0013] Preferably, the test flow device includes a tenth pipeline, a ninth switching valve, a turbine flow meter, an eleventh pipeline, a tenth switching valve, a second temperature sensor, and a second pressure sensor. One end of the tenth pipeline is simultaneously connected to the other ends of the eighth and ninth pipelines. The ninth switching valve and the turbine flow meter are both located on the tenth pipeline. One end of the eleventh pipeline is simultaneously connected to the other ends of the eighth and ninth pipelines. The tenth switching valve, the second temperature sensor, and the second pressure sensor are all located on the eleventh pipeline. The pressure stabilizing device includes a back pressure tank, a twelfth pipeline, an eleventh switching valve, and a nitrogen cylinder. The back pressure tank is connected to the other ends of the tenth and eleventh pipelines. One end of the twelfth pipeline is connected to the back pressure tank, and the other end of the twelfth pipeline is connected to the nitrogen cylinder. The eleventh switching valve is located on the twelfth pipeline.

[0014] Preferably, the oil return component includes a thirteenth pipeline, a twelfth switching valve, a fourteenth pipeline, a first precision needle valve, a fifteenth pipeline, a second precision needle valve, a sixteenth pipeline, a second filter, a thirteenth switching valve, and a fourteenth switching valve. One end of the thirteenth pipeline is connected to the bottom surface of the back pressure tank. The twelfth switching valve is laterally connected to the thirteenth pipeline. One end of the fourteenth pipeline is connected to the other end of the thirteenth pipeline. The first precision needle valve is connected to the fourteenth pipeline. One end of the fifteenth pipeline is connected to the other end of the thirteenth pipeline. The second precision needle valve is connected to the fifteenth pipeline. One end of the sixteenth pipeline is simultaneously connected to the other ends of both the fourteenth and fifteenth pipelines. The second filter is connected to the sixteenth pipeline. The thirteenth switching valve is laterally connected to the sixteenth pipeline. The fourteenth switching valve is connected to the sixteenth pipeline.

[0015] Preferably, the test method for the flow meter oil supply test system in a low flow rate and low temperature difference test scenario includes the following steps: S1: Adjust the measurement signals of temperature, pressure, and the first standard flow meter, display the readings correctly, open the first switch valve, close the second switch valve, turn on the heat exchanger for preheating, and set the heat exchanger. S2: Open the third and fourteenth switch valves, ensure that the sixth, seventh, and tenth switch valves are open, and ensure that the eighth, ninth, twelfth, and thirteenth switch valves are closed; S3: Open the eleventh switch valve and pre-charge the back pressure tank according to the turbine flow meter calibration pressure. At this time, the first precision needle valve and the second precision needle valve need to be closed. S4: When the pressure is lower than the pressure tested by the turbine flow meter, the oil pump is turned on after the pressure stabilizes to fill the pipeline system and the back pressure tank with liquid; S5: Adjust the first precision needle valve and the second precision needle valve until the readings of the second temperature sensor, the second pressure sensor and the first standard flow meter simultaneously meet the test conditions of the turbine flow meter, and record the readings of the second temperature sensor, the second pressure sensor and the first standard flow meter. S6: When the stable operating conditions of the test are met for more than 5 minutes, open the ninth switch valve and close the tenth switch valve. If the readings of the first temperature sensor, the first pressure sensor and the first standard flow meter change significantly, then fine-tune the first precision needle valve, the second precision needle valve and the heat exchanger. If the readings change very little or not at all, then the test conditions are met, and then the test on the turbine flow meter begins. S7: During long-term testing, if there are deviations in temperature, pressure, and flow rate, it is necessary to fine-tune the first precision needle valve, the second precision needle valve, and the heating / cooling machine in real time to meet the operating conditions specified in the test. S8: After the test is completed, the heating and cooling machine and the oil pump should be turned off in sequence. When the pressure of the back pressure tank is close to atmospheric pressure, nitrogen should be used to purge the remaining oil in the pipeline, and the fourteenth switch valve and the third switch valve should be closed.

[0016] Preferably, the test method for the flow meter oil supply test system under high flow rate and high temperature difference test scenarios includes the following steps: S1: Adjust the measurement signals of temperature, pressure, and the first standard flow meter to ensure correct display of readings, and fully open the first and second switch valves; S2: Preheat the fuel in the fuel tank, open the third switch valve, close the fifth and sixth switch valves, and turn on the fuel pump to circulate the fuel in the fuel tank until the temperature rises to the predetermined temperature; S3: Open the seventh switch valve and pre-charge the back pressure tank according to the turbine flow meter calibration pressure. At this time, the first precision needle valve and the second precision needle valve need to be closed. S4: After the pressure stabilizes, open the fifth switch valve and the oil pump to fill the pipeline system and the back pressure tank with liquid. The liquid level must be at least higher than the outlet of the back pressure tank. S5: Adjust the first precision needle valve and the second precision needle valve until the readings of the second temperature sensor, the second pressure sensor and the first standard flow meter simultaneously meet the test conditions of the turbine flow meter, and record the readings of the first temperature sensor, the first pressure sensor and the first standard flow meter. S6: When the stable operating conditions of the test are met for more than 5 minutes, open the ninth switch valve and close the tenth switch valve. If the readings of the first temperature sensor, the first pressure sensor and the flow meter change significantly, then fine-tune the first precision needle valve, the second precision needle valve and the heat exchanger. If the readings change very little or not at all, then the test conditions are met, and the test of the turbine flow meter begins. S7: If there are deviations in temperature, pressure and flow rate during long-term testing, the first precision needle valve, the second precision needle valve and the heating / cooling machine need to be finely adjusted in real time to meet the operating conditions specified in the test. S8: After the test is completed, the heating and cooling machine and the oil pump should be turned off in sequence. When the pressure of the back pressure tank is close to atmospheric pressure, nitrogen should be used to purge the remaining oil in the pipeline, and the fourteenth switch valve and the third switch valve should be closed.

[0017] Preferably, the oil inlet component includes a seventeenth pipeline and a fifteenth switching valve. One end of the seventeenth pipeline is connected to the other end of the third pipeline, and the seventeenth pipeline is connected in series with the external heat exchanger. The fifteenth switching valve is installed on the seventeenth pipeline. The first standard flow component includes an eighteenth pipeline, a second standard flow meter, a third temperature sensor, and a third pressure sensor. One end of the eighteenth pipeline is connected to the other end of the seventeenth pipeline. The second standard flow meter, the third temperature sensor, and the third pressure sensor are all located on the eighteenth pipeline. The test flow component includes a nineteenth pipeline. One end of the nineteenth pipeline is connected to the other end of the eighteenth pipeline and is used to test the connected test turbine flow meter. The oil return component includes a twentieth pipeline, a sixteenth switching valve, a twenty-first pipeline, a third precision needle valve, a twenty-second pipeline, a fourth precision needle valve, and a twenty-third pipeline. The system includes pipelines, a third filter, and a seventeenth switching valve. One end of the twentieth pipeline is connected to the back pressure tank of the pressure stabilizer. One end of the sixteenth switching valve is connected to the back pressure tank. One end of the twentieth pipeline is connected to the other end of the twentieth pipeline. A third precision needle valve is installed on the twentieth pipeline. One end of the twentieth pipeline is connected to the other end of the twentieth pipeline. A fourth precision needle valve is installed on the twentieth pipeline. One end of the twentieth pipeline is connected to both the twentieth and twentieth pipelines. The other end of the twentieth pipeline is connected to the oil tank. The third filter is installed on the twentieth pipeline. One end of the seventeenth switching valve is connected to the oil tank. The flow meter oil supply test system has corresponding usage methods for small flow rate and low temperature difference test scenarios and large flow rate and high temperature difference test scenarios.

[0018] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: (1) The flow meter oil supply test system of the present invention can significantly improve the test coverage and authenticity, has high test accuracy, optimizes the system structure and reliability, and significantly improves the safety and environmental performance of the test process; (2) The flow meter oil supply test system of the present invention can accurately and quickly simulate and reproduce the complex working conditions in the actual oil supply system (realizing the test requirements of various different use scenarios), and can comprehensively evaluate the turbine flow meter, greatly improving the test coverage and the engineering reference value of the results; the system adopts high precision (such as high-grade standard flow meters, pressure sensors and temperature sensors), and combined with optimized pipeline design, effectively ensuring the stability of the flow field in the test section, minimizing the system uncertainty, thereby providing high-confidence calibration results for the turbine flow meter under test, and supporting the accuracy of its test value transmission; (3) The flow meter oil supply test system of the present invention adopts a highly integrated modular design (such as power module, temperature control module, measurement module, etc.), which makes the system structure compact and the layout reasonable, reducing the floor space and pipeline complexity, while facilitating installation, maintenance and functional expansion; and through material compatibility selection and parameter adjustable range design, the system can be applied to test media of different viscosities (such as aviation kerosene, diesel, lubricating oil, etc.), and can be compatible with testing flow meters of various principles (turbine, volumetric, Coriolis, etc.), with a wide range of applications. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the test system according to Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the test system according to Embodiment 2 of the present invention; Figure 3 This is a schematic diagram of the experimental apparatus in Embodiment 2 of the present invention.

[0020] In the diagram: 1-Turbine flow meter, 2-Heat / cooler, 3-First switching valve, 4-External heat exchanger, 5-Second switching valve, 6-Internal heat exchanger, 7-Oil tank, 8-First filter, 9-Third switching valve, 10-Oil pump, 11-Fourth switching valve, 12-Fifth switching valve, 13-Sixth switching valve, 14-First temperature sensor, 15-First pressure sensor, 16-Seventh switching valve, 17-First standard flow meter, 18-Eighth switching valve, 19-Ninth switching valve, 20-Turbine flow meter, 21-Tenth switching valve, 22-Second temperature sensor 23-Second pressure sensor, 24-Back pressure tank, 25-Eleventh switch valve, 26-Nitrogen cylinder, 27-Twelfth switch valve, 28-First precision needle valve, 29-Second precision needle valve, 30-Second filter, 31-Thirteenth switch valve, 32-Fourteenth switch valve, 33-Fifteenth switch valve, 34-Second standard flow meter, 35-Third temperature sensor, 36-Third pressure sensor, 37-Sixteenth switch valve, 38-Third precision needle valve, 39-Fourth precision needle valve, 40-Third filter, 41-Seventeenth switch valve. Detailed Implementation

[0021] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0022] In embodiments of the present invention, words such as "exemplarily," "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present the concept in a concrete manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0023] In the embodiments of this invention, the terms "image" and "picture" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, they convey the same meaning. Similarly, the terms "of," "corresponding (relevant)," and "corresponding" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, they convey the same meaning.

[0024] In this embodiment of the invention, sometimes a subscript such as W1 may be written in a non-subscript form such as W1. When the difference is not emphasized, the meaning they express is the same.

[0025] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0026] Example 1 according to Figure 1As shown, a flow meter fuel supply test system includes a circulating heat-conducting component and a fuel component. The fuel component is connected to the circulating heat-conducting component, and the circulating heat-conducting component heats the fuel within the fuel component to meet the requirements of the fuel component for testing a turbine flow meter 1. The circulating heat-conducting component includes a chiller / heater 2, an internal heat exchanger, and an external heat exchanger. The internal heat exchanger and the external heat exchanger are connected in parallel and through the chiller / heater 2.

[0027] The external heat exchanger includes a first pipeline, a first switching valve 3, and an external heat exchanger 4. One end of the first pipeline is connected to the outlet of the chiller 2, and the other end is connected to the inlet of the chiller 2. The first switching valve 3 and the external heat exchanger 4 are both installed on the first pipeline, and the first switching valve 3 is located at the front end of the external heat exchanger 4 to control the flow of thermally conductive silicone oil in the chiller 2 to the external heat exchanger 4.

[0028] The internal heat exchanger includes a second pipeline, a second switching valve 5, and an internal heat exchanger 6. One end of the second pipeline is connected to the outlet of the chiller / heater 2, and the other end is connected to the inlet of the chiller / heater 2. The second switching valve 5 and the internal heat exchanger 6 are both installed on the second pipeline, with the second switching valve 5 located at the front end of the internal heat exchanger 6 to control the flow of the thermally conductive silicone oil in the chiller / heater 2 to the internal heat exchanger 6. The second pipeline is connected in parallel with the first pipeline.

[0029] When the external circulation component can heat the fuel in the fuel tank independently, the external circulation component and the internal circulation component can work together to heat the fuel, thereby achieving temperature control of the fuel. When the required fuel flow rate and temperature for the test are large, i.e., when the power is large, the internal heat exchanger 6 and the external heat exchanger 4 can be used simultaneously. In particular, the internal heat exchanger 6 needs to preheat the fuel temperature in the fuel tank 7 to the required test temperature. The amount of overheating needs to be determined after measuring the heat dissipation loss of the circulation system. If precise control of a small flow rate and a short response time are required, only the external heat exchanger 4 is needed for heat exchange. At high power, the heat dissipation needs to be measured in real time. Here, the following conditions must be met: the heat dissipation loss of the entire system must be less than or equal to the effective heat exchange power provided by the heat exchanger 2, and at least the power heat exchange requirements of the high-pressure area (the flow test component and the voltage regulator component) must be met. If limited by site space and power supply, the volume of the fuel tank 7 needs to be appropriately increased and the insulation measures of the circulation system need to be upgraded.

[0030] The fuel supply component includes a fuel supply component, a flow test component, a pressure stabilizer component, and a fuel return component. The fuel supply component is located outside the inner heat exchanger component, enabling the fuel in the fuel supply component to transfer heat with the inner heat exchanger component. The flow test component is connected to the fuel supply component through the outer heat exchanger component to conduct a fuel supply test on the turbine flow meter 1 under test using fuel at a predetermined temperature. The pressure stabilizer component is connected to the flow test component to stabilize the fuel pressure during the test. The fuel return component is connected to both the pressure stabilizer component and the fuel supply component to return the fuel to the fuel supply component.

[0031] The fuel supply system includes a fuel tank 7, a fuel supply power unit, and a heating circulation unit. The fuel tank 7 is located on the ground and has an internal heat exchanger 6 installed inside. The fuel tank 7 stores fuel oil. The fuel supply power unit is connected to the fuel tank 7 to pump the fuel oil in the fuel tank 7 backward. The heating circulation unit is connected to both the fuel supply power unit and the fuel tank 7 to circulate and heat the fuel oil in the fuel tank 7 through the internal heat exchanger 6.

[0032] The fuel supply system includes a third pipeline, a first filter 8, a third switching valve 9, and a fuel pump 10. One end of the third pipeline is connected to the fuel tank 7. The first filter 8, the third switching valve 9, and the fuel pump 10 are all connected to the third pipeline. The fuel pump 10 delivers fuel from the fuel tank 7 through the first filter 8 and the third switching valve 9. The fuel pump 10 provides flow control for the testing system.

[0033] The heating circulation component includes a fourth pipeline and a fourth switching valve 11. One end of the fourth pipeline is connected to the other end of the third pipeline, and the other end of the fourth pipeline is connected to the bottom surface of the oil tank 7. The fourth switching valve 11 is located on the fourth pipeline to control the opening or closing of the fourth pipeline. The fourth switching valve 11 is a pressure regulating valve to prevent blockage of the circulation pipeline or negligence on the part of the test operator in forgetting to open the circulation system flow path during the test.

[0034] The flow testing component includes a first standard flow component and a test flow component. The first standard flow component is connected in communication with the fuel supply power component, and the test flow component is connected in communication with the first standard flow component. The first standard flow component includes an inlet component and a second standard flow component. The inlet component is connected in communication with the fuel supply power component to receive the fuel delivered by the fuel pump 10, and the second standard flow component is connected in communication with the inlet component.

[0035] The oil inlet includes a fifth pipeline, a fifth switching valve 12, a sixth pipeline, and a sixth switching valve 13. One end of the fifth pipeline is connected to the other end of the third pipeline to receive the fuel oil supplied by the oil pump 10. The fifth pipeline is connected in series with the external heat exchanger 4 to heat the fuel oil flowing through the fifth pipeline. The fifth switching valve 12 is installed on the fifth pipeline to control the flow of fuel oil from the fifth pipeline to the external heat exchanger 4. One end of the sixth pipeline is connected to the other end of the third pipeline, so that the sixth pipeline is connected in parallel with the fifth pipeline. The sixth switching valve 13 is installed on the sixth pipeline to control the opening or closing of the sixth pipeline.

[0036] The second standard flow element includes a seventh pipeline, a first temperature sensor 14, a first pressure sensor 15, an eighth pipeline, a seventh switching valve 16, a first standard flow meter 17, a ninth pipeline, and an eighth switching valve 18. One end of the seventh pipeline is simultaneously connected to the other ends of the fifth and sixth pipelines. The first temperature sensor 14 and the first pressure sensor 15 are simultaneously installed on the seventh pipeline. One end of the eighth pipeline is connected to the other end of the seventh pipeline. The seventh switching valve 16 and the first standard flow meter 17 are both installed on the eighth pipeline. One end of the ninth pipeline is connected to the other end of the seventh pipeline. The ninth pipeline is connected in parallel with the eighth pipeline. The eighth switching valve 18 is installed on the ninth pipeline to control the opening or closing of the ninth pipeline.

[0037] Considering that the use of a standard flow meter may not be suitable for all temperature ranges and flow conditions, an eighth switch valve 18 is set. When the eighth switch valve 18 is in use, the seventh switch valve 16 needs to be closed. When the standard flow meter cannot be used, the eighth switch valve 18 is opened, and the flow is measured through the thirteenth switch valve 31 in the oil return component. At this time, the fourteenth switch valve 32 needs to be closed. The flow measurement is calibrated by weighing and timing.

[0038] The test flow device includes a tenth pipeline, a ninth switching valve 19, a turbine flow meter 1, an eleventh pipeline, a tenth switching valve 21, a second temperature sensor 22, and a second pressure sensor 23. One end of the tenth pipeline is simultaneously connected to the other end of both the eighth and ninth pipelines. The ninth switching valve 19 and the turbine flow meter 1 are both located on the tenth pipeline. One end of the eleventh pipeline is simultaneously connected to the other end of both the eighth and ninth pipelines, so that the eleventh pipeline is connected in parallel with the tenth pipeline. The tenth switching valve 21, the second temperature sensor 22, and the second pressure sensor 23 are all located on the eleventh pipeline.

[0039] To shorten the experimental time and reduce the impact and wear of fuel on the turbine flow meter 1 during the experimental testing and debugging phase, a parallel flow channel is set up for the turbine flow meter 1, namely the tenth switching valve 21 channel. This channel is equipped with a second temperature sensor 22 and a second pressure sensor 23. When the tenth switching valve 21 is open, the ninth switching valve 19 is closed. The opening degree of the tenth switching valve 21 is set based on the flow losses caused by the turbine flow meter 1, the ninth switching valve 19, and the response pipeline. When the temperature and pressure reach the experimental requirements of the turbine flow meter 1 and remain stable for more than one minute, the ninth switching valve 19 is opened and the tenth switching valve 21 is closed, allowing the experiment to begin.

[0040] The pressure stabilizing component includes a back pressure tank 24, a twelfth pipeline, an eleventh switch valve 25, and a nitrogen cylinder 26. The back pressure tank 24 is located on the ground and is connected to the connecting pipe at the other end of the tenth and eleventh pipelines. The connection point between the connecting pipe and the back pressure tank 24 is below the fuel level inside the back pressure tank 24. One end of the twelfth pipeline is connected to the top of the back pressure tank 24, and the other end is connected to the nitrogen cylinder 26. The eleventh switch valve 25 is located on the twelfth pipeline to control whether the twelfth pipeline is open or closed.

[0041] The oil return system includes a thirteenth pipeline, a twelfth switching valve 27, a fourteenth pipeline, a first precision needle valve 28, a fifteenth pipeline, a second precision needle valve 29, a sixteenth pipeline, a second filter 30, a thirteenth switching valve 31, and a fourteenth switching valve 32. One end of the thirteenth pipeline is connected to the bottom surface of the back pressure tank 24. The twelfth switching valve 27 is laterally connected to the thirteenth pipeline. One end of the fourteenth pipeline is connected to the other end of the thirteenth pipeline. The first precision needle valve 28 is connected to the fourteenth pipeline. Above, one end of the fifteenth pipeline is connected to the other end of the thirteenth pipeline, so that the fifteenth pipeline and the fourteenth pipeline are connected in parallel. The second precision needle valve 29 is disposed through the fifteenth pipeline. One end of the sixteenth pipeline is connected to the other end of both the fourteenth pipeline and the fifteenth pipeline. The second filter 30 is disposed through the sixteenth pipeline. The thirteenth switch valve 31 is disposed laterally through the sixteenth pipeline. The fourteenth switch valve 32 is disposed through the sixteenth pipeline.

[0042] To stabilize flow fluctuations and maintain a relatively stable pressure measured by the turbine flow meter 1, an explosion-proof back pressure tank 24 is required. The explosion-proof back pressure tank 24 is filled with nitrogen. The eleventh switching valve 25 is used to purge the back pressure tank 24 according to the required pressure. The outflow pipe (thirteenth pipe) of the back pressure tank 24 is laterally connected to the twelfth switching valve 27. The outflow pipe must be below the fuel level; otherwise, pressure instability will occur. Dynamic pressure control is achieved using a parallel connection of the first precision needle valve 28 and the second precision needle valve 29. A third precision needle valve, etc., can also be connected in parallel as needed.

[0043] Before the test, ensure the pipeline is leak-free. The testing method is as follows: close the third switch valve 9, the twelfth switch valve 27, the thirteenth switch valve 31, and the fourteenth switch valve 32, and open all other switch valves and precision needle valves. Use nitrogen cylinder 26 to purge the pipeline system, ensuring that the pressure is maintained at 5 MPa for 1 hour and the pressure drop does not exceed 1%. The pipeline leak test is required every time the pipeline is replaced or after the system has been unused for an extended period. Check the oil level in tank 7; it should be above the internal heat exchanger 6. Verify that all sensor readings are normal, and that the explosion-proof valve, check valve, power supply, and anti-static connections are functioning correctly. Only if all are normal can the test system be further operated. Otherwise, investigate the cause of the problem and resolve it.

[0044] The flow meter oil supply test system has two test scenarios, and the usage method for each test scenario is as follows: When testing turbine flow meter 1 using a low-flow-rate, low-temperature-difference test scenario, the following methods are used: S1: Adjust the measurement signals of temperature, pressure, and the first standard flow meter 17, display the readings correctly, open the first switch valve 3, close the second switch valve 5, turn on the heat exchanger 2 for preheating, and set the heat exchanger 2. S2: Open the third switch valve 9 and the fourteenth switch valve 32, ensure that the sixth switch valve 13, the seventh switch valve 16, and the tenth switch valve 21 are open, and ensure that the eighth switch valve 18, the ninth switch valve 19, the twelfth switch valve 27, and the thirteenth switch valve 31 are closed; S3: Open the eleventh switch valve 25 to pre-charge the back pressure tank 24 according to the calibrated pressure of the turbine flow meter 1. At this time, the first precision needle valve 28 and the second precision needle valve 29 need to be closed (the back pressure tank 24 needs to be evacuated and replaced with nitrogen for the first use, and the entire pipeline needs to be purged with nitrogen). S4: The pressure is slightly lower than the pressure tested by the turbine flow meter 1. After the pressure stabilizes, turn on the oil pump 10 to fill the pipeline system and the back pressure tank 24 with liquid. The liquid level should be at least 4 cm higher than the outlet of the back pressure tank 24 (where the thirteenth pipeline is connected to the back pressure tank 24). S5: Adjust the first precision needle valve 28 and the second precision needle valve 29 until the readings of the second temperature sensor 22, the second pressure sensor 23 and the first standard flow meter 17 simultaneously meet the test conditions of the turbine flow meter 1, and record the readings of the second temperature sensor 22, the second pressure sensor 23 and the first standard flow meter 17. S6: When the stable operating conditions of the test are met for more than 5 minutes, open the ninth switch valve 19 and close the tenth switch valve 21. If the readings of the first temperature sensor 14, the first pressure sensor 15 and the first standard flow meter 17 change significantly, then fine-tune the first precision needle valve 28, the second precision needle valve 29 and the heat exchanger 2. If the readings change very little or not at all, the test conditions are met, and then the test on the turbine flow meter 1 begins. S7: During long-term testing, if there are deviations in temperature, pressure and flow rate, it is necessary to fine-tune the first precision needle valve 28, the second precision needle valve 29 and the heating / cooling machine 2 in real time to meet the operating conditions specified in the test. S8: After the test is completed, the heating / cooling unit 2 and the oil pump 10 should be turned off in sequence. When the pressure of the back pressure tank 24 is close to atmospheric pressure, nitrogen should be used to purge the remaining oil in the pipeline, and the fourteenth switch valve 32 and the third switch valve 9 should be closed.

[0045] When testing the turbine flow meter 1 under a high flow rate and high temperature difference test scenario, the following methods are used: S1: Adjust the measurement signals of temperature, pressure, and the first standard flow meter 17, display the readings correctly, and fully open the first switch valve 3 and the second switch valve 5; S2: Preheat the fuel in the fuel tank 7, open the third switch valve 9, close the fifth switch valve 12 and the sixth switch valve 13, and open the fuel pump 10 so that the fuel circulates in the fuel tank 7 (returns to the fuel tank 7 via the fourth switch valve 11) until the temperature difference between the fuel tank 7 and the test temperature is within 5°C. S3: Open the seventh switch valve 16 and pre-charge the back pressure tank 24 according to the calibrated pressure of the turbine flow meter 1. At this time, the first precision needle valve 28 and the second precision needle valve 29 need to be closed (the back pressure tank 24 needs to be evacuated and replaced with nitrogen for the first use, and the entire pipeline needs to be purged with nitrogen). S4: After the pressure stabilizes (the pressure is lower than the pressure tested by the turbine flow meter 1), open the fifth switch valve 12 and the oil pump 10 to fill the pipeline system and the back pressure tank 24 with liquid. The liquid level should be at least 4 cm higher than the outlet of the back pressure tank 24. S5: Adjust the first precision needle valve 28 and the second precision needle valve 29 until the readings of the second temperature sensor 22, the second pressure sensor 23 and the first standard flow meter 17 simultaneously meet the test conditions of the turbine flow meter 1, and record the readings of the first temperature sensor 14, the first pressure sensor 15 and the first standard flow meter 17. S6: When the stable operating conditions of the test are met for more than 5 minutes, open the ninth switch valve 19 and close the tenth switch valve 21. If the readings of the first temperature sensor 14, the first pressure sensor 15 and the flow meter change significantly, then fine-tune the first precision needle valve 28, the second precision needle valve 29 and the heat exchanger 2. If the readings change very little or not at all, then the test conditions are met, and the test on the turbine flow meter 1 begins. S7: If the temperature, pressure and flow rate deviate during the long-term test, the first precision needle valve 28, the second precision needle valve 29 and the heating / cooling machine 2 need to be finely adjusted in real time to meet the working conditions specified in the test. S8: After the test is completed, the heating / cooling unit 2 and the oil pump 10 should be turned off in sequence. When the pressure of the back pressure tank 24 is close to atmospheric pressure, nitrogen should be used to purge the remaining oil in the pipeline, and the fourteenth switch valve 32 and the third switch valve 9 should be closed.

[0046] It should be noted that when the standard flow meter cannot measure, the operation method is the same as the two test scenarios mentioned above, except for the flow path positions of the seventh switch valve 16 and the eighth switch valve 18. When the test conditions of turbine flow meter 1 exceed those of the standard flow meter, close the seventh switch valve 16 and open the eighth switch valve 18. During calibration, the fourteenth switch valve 32 needs to be closed and the thirteenth switch valve 31 needs to be opened. Flow measurement is calibrated by weighing and timing. Note that this is for calibration; the operating conditions (such as temperature, pressure, and power of the chiller / heater 2) need to remain unchanged for 30 minutes. When it comes to the turbine flow meter 1 measurement stage, open the fourteenth switch valve 32 and close the thirteenth switch valve 31. The first precision needle valve 28, the second precision needle valve 29, and the chiller / heater 2 remain unchanged. Perform normal calibration of turbine flow meter 1.

[0047] Example 2 The similarities between this embodiment and Embodiment 1 will not be repeated here. The differences are as follows: This embodiment adopts a simplified design concept and functional implementation of the test bench. according to Figure 2 and 3As shown, the simplified design assumes that the standard flow meter can meet the measurement requirements of the test turbine flow meter 1, and reduces the number of parallel pipelines that increase test efficiency. The advantage is system simplification, which also simplifies the operation process. The test bench is designed for normal temperature and pressure conditions (25 ℃, 1 atm), employing pressure measurement, flow measurement, and temperature measurement control methods. For safety, an explosion-proof design is adopted. The heating / cooling engine 2 and the fuel tank 7 transfer heat through a heat exchange medium, and some areas use high pressure. The fuel tank 7 and precision control area are in a normal temperature and pressure environment. The test section of turbine flow meter 1 uses pressure control, while other pipeline sections are in a normal pressure state. Temperature control adopts a parallel dual-path control method, divided into direct control (external heat exchanger) and combined control of direct control (external heat exchanger) and reserve (internal heat exchanger). Flow control is based on the control level of oil pump 10. All pipeline systems of the test bench must adopt thermal insulation and explosion-proof design. The pipeline system of the test bench is as follows: Figure 2 As shown.

[0048] The oil inlet includes a seventeenth pipeline and a fifteenth switching valve 33. One end of the seventeenth pipeline is connected to the other end of the third pipeline to receive the fuel oil delivered by the oil pump 10. The seventeenth pipeline is connected in series with the external heat exchanger 4 to heat the fuel oil flowing through the seventeenth pipeline. The fifteenth switching valve 33 is installed on the seventeenth pipeline to control the flow of fuel oil in the seventeenth pipeline to the external heat exchanger 4.

[0049] The second standard flow element includes an eighteenth pipeline, a second standard flow meter 34, a third temperature sensor 35, and a third pressure sensor 36. One end of the eighteenth pipeline is connected to the other end of the seventeenth pipeline. The second standard flow meter 34, the third temperature sensor 35, and the third pressure sensor 36 are all installed on the eighteenth pipeline.

[0050] The test flow device includes a nineteenth pipeline and a test turbine flow meter 1. One end of the nineteenth pipeline is connected to the other end of the eighteenth pipeline, and the test turbine flow meter 1 is installed on the nineteenth pipeline to be tested.

[0051] The oil return system includes a twentieth pipeline, a sixteenth switching valve 37, a twenty-first pipeline, a third precision needle valve 38, a twenty-second pipeline, a fourth precision needle valve 39, a twenty-third pipeline, a third filter 40, and a seventeenth switching valve 41. One end of the twentieth pipeline is connected to the bottom surface of the back pressure tank 24. One end of the sixteenth switching valve 37 is connected to the bottom surface of the back pressure tank 24. One end of the twenty-first pipeline is connected to the other end of the twenty-first pipeline. The third precision needle valve 38 is connected to the twenty-first pipeline. One end of the twenty-second pipeline is connected to the other end of the twenty-first pipeline, so that the twenty-second pipeline and the twenty-first pipeline are connected in parallel. The fourth precision needle valve 39 is connected to the twenty-second pipeline. One end of the twenty-third pipeline is connected to both the twenty-first pipeline and the other end of the twenty-second pipeline. The other end of the twenty-third pipeline is connected to the bottom surface of the oil tank 7. The third filter 40 is connected to the twenty-third pipeline. One end of the seventeenth switching valve 41 is connected to the bottom surface of the oil tank 7.

[0052] Before the test, the flow meter oil supply test system described in this embodiment must be ensured to be leak-free. The test method is as follows: open the eleventh switch valve 25, close the fifteenth switch valve 33 and the sixteenth switch valve 37, the third precision needle valve 38 and the fourth precision needle valve 39, and use nitrogen cylinder 26 to purge the pipeline system, ensuring that the pressure of 5.5 MPa is maintained for 1 hour without dropping. The pipeline leakage condition needs to be tested every time the pipeline is replaced or after the system has not been used for a long time. Check the liquid level in the oil tank 7. If the liquid level is above the internal heat exchanger 6, check whether the readings of each sensor are normal, and check whether the explosion-proof valve, check valve, power supply and anti-static connection are normal. If all are normal, the test system can be operated further. Otherwise, find out the cause of the problem and solve it.

[0053] The flow meter oil supply test system described in this embodiment has two test scenarios, and the usage method for each test scenario is as follows: When testing turbine flow meter 1 using a low-flow-rate, low-temperature-difference test scenario, the following methods are used: S1: Adjust the measurement signals of temperature, pressure, and standard flow meter, display the readings correctly, open the first switch valve 3, close the second switch valve 5, turn on the heat exchanger 2 for preheating, and set the heat exchanger 2. S2: Open the fifteenth switch valve 33, and ensure that the sixteenth switch valve 37 and the seventeenth switch valve 41 are closed; S3: Open the eleventh switch valve 25 to pre-charge the back pressure tank 24 according to the calibrated pressure of the turbine flow meter 1. At this time, the third precision needle valve 38 and the fourth precision needle valve 39 need to be closed (the back pressure tank 24 needs to be evacuated and replaced with nitrogen for the first use, and the entire pipeline needs to be purged with nitrogen). S4: The pressure is slightly lower than the pressure tested by the turbine flow meter 1. After the pressure stabilizes, turn on the oil pump 10 to fill the pipeline system and back pressure tank 24 with liquid. The liquid level should be at least 4 cm higher than the outlet of the back pressure tank 24 (where the twentieth pipeline connects to the back pressure tank 24). S5: Adjust the third precision needle valve 38 and the fourth precision needle valve 39 until the readings of the third temperature sensor 35, the third pressure sensor 36 and the second standard flow meter 34 simultaneously meet the test conditions of the turbine flow meter 1, and record the readings of the third temperature sensor 35, the third pressure sensor 36 and the second standard flow meter 34. S6: If the stable operating conditions of the test are met for more than 5 minutes, and the temperature and pressure readings change significantly, then the third precision needle valve 38, the fourth precision needle valve 39, and the heat exchanger 2 are finely adjusted. If the readings change very little or not at all, then the test conditions are met, and the test turbine flow meter 1 is then tested. S7: If there are deviations in temperature, pressure and flow rate during long-term testing, the third precision needle valve 38, the fourth precision needle valve 39 and the heating / cooling machine 2 need to be finely adjusted in real time to meet the operating conditions specified in the test. S8: After the test is completed, the heating / cooling unit 2 and the oil pump 10 should be turned off in sequence, the sixteenth switch valve 37 should be opened to release pressure, and when the pressure of the back pressure tank 24 is close to atmospheric pressure, nitrogen should be used to purge the remaining oil in the pipeline, and the sixteenth switch valve 37 and the fifteenth switch valve 33 should be closed.

[0054] When testing the turbine flow meter 1 under a high flow rate and high temperature difference test scenario, the following methods are used: S1: Adjust the measurement signals of temperature, pressure, and standard flow meter, display the readings correctly, and open the first switch valve 3 and the second switch valve 5; S2: Preheat the fuel in the fuel tank 7, close the fifteenth switch valve 33, and turn on the fuel pump 10 so that the fuel circulates in the fuel tank 7 (returns to the fuel tank 7 via the fourth switch valve 11) until the temperature difference between the fuel and the test temperature is within 5°C. S3: Open the eleventh switch valve 25 to pre-charge the back pressure tank 24 according to the calibrated pressure of the turbine flow meter 1. At this time, the third precision needle valve 38 and the fourth precision needle valve 39 need to be closed (the back pressure tank 24 needs to be evacuated and replaced with nitrogen for the first use, and the entire pipeline needs to be purged with nitrogen). S4: When the pressure is lower than the pressure tested by the test turbine flow meter 1, after the pressure stabilizes, turn on the oil pump 10 to fill the pipeline system and the back pressure tank 24 with liquid. The liquid level should be at least 4 cm higher than the outlet of the back pressure tank 24. S5: Adjust the third precision needle valve 38 and the fourth precision needle valve 39 until the readings of the third temperature sensor 35, the third pressure sensor 36 and the second standard flow meter 34 simultaneously meet the test conditions of the turbine flow meter 1, and record the readings of the third temperature sensor 35, the third pressure sensor 36 and the second standard flow meter 34. S6: If the stable operating conditions of the test are met for more than 5 minutes, and the changes of the third temperature sensor 35, the third pressure sensor 36 and the second standard flow meter 34 are large, then the third precision needle valve 38, the fourth precision needle valve 39 and the heat exchanger 2 are finely adjusted. If the changes of the readings are very small or do not change, then the test conditions are met, and the test turbine flow meter 1 is started at this time. S7: If there are deviations in temperature, pressure and flow rate during long-term testing, the third precision needle valve 38, the fourth precision needle valve 39 and the heating / cooling machine 2 need to be finely adjusted in real time to meet the operating conditions specified in the test. S8: After the test is completed, the heating and cooling machine 2 and the oil pump 10 should be turned off in sequence. When the pressure of the back pressure tank 24 is close to atmospheric pressure, nitrogen should be used to purge the remaining oil in the pipeline and the fifteenth switch valve 33 and the sixteenth switch valve 37 should be closed. The experimental setup was constructed in an area with a three-phase power supply, close to the wall. A survey was conducted at a depth of 2 meters. 3 The equipment includes oil tank 7, heating / cooling unit 2, a 100L back pressure tank, and related instruments and equipment. A rendering of the design, including the oil tank 7 and the back pressure tank, is provided based on the actual size of the installation. The indoor unit mainly consists of a pressure control area, a temperature control area, a flow control area, and a test flow meter. The oil tank 7 and back pressure tank are located outdoors. The equipment rendering is shown below. Figure 3 As shown.

[0055] It should be noted that the power and space of the heating and cooling machine 2 are determined according to the power supply of the test site. Considering safety, the heating and cooling machine 2 uses 201 dimethyl silicone oil (-55~180 ℃) with high flash point and boiling point as the heat transfer medium to indirectly exchange heat with fuel oil. The amount of heat transfer medium used is determined by the capacity of the heating and cooling machine 2 and the capacity of the pipeline system.

[0056] The oil tank 7 is an insulated and explosion-proof oil tank. The oil tank 7 is used at normal temperature and pressure. The oil tank 7 is equipped with an interface that can be replaced with a larger capacity oil tank 7 or connected in parallel. The back pressure tank is an insulated and explosion-proof back pressure tank. The standard is to test the stability of the flow rate and pressure under the maximum flow condition. The precision needle valve is a high temperature and low temperature resistant precision needle valve. For the selection of pipe wall thickness, 316L stainless steel pipe is used, and the allowable stress of the inner pipe material (300℃) is as follows: (1) Minimum wall thickness: (2) Among them, fluid pressure MPa, inner tube diameter if mm, considering safety redundancy, the pipe wall thickness should be at least 0.8 mm.

[0057] Oil tank heat exchange and time verification: At low temperatures, with a specific heat capacity of Cp1 = 1900 J / kgK, cooling kerosene from 25°C to -45°C at a flow rate of 1.5 kg / s (the maximum cooling capacity) requires 200 kW. At high temperatures, with a specific heat capacity of Cp1 = 2100 J / kgK, heating from 5°C to 85°C at a flow rate of 1.5 kg / s requires 252 kW of heating power. This is too high a power requirement for direct heat transfer.

[0058] Refrigeration flow rate of kerosene: (3) Heating flow rate of kerosene: (4) If a capacity control method is used, that is, a fuel tank is used to preheat a certain amount of fuel to a certain temperature before temperature control is applied before flow measurement. Assuming that the fuel tank and piping system cause a temperature difference of 5-10℃ between the fuel entering external heat exchanger 4 and the target temperature, then the required heat exchange is: Refrigeration flow rate of kerosene: (6.5-13 horses) (3) Heating flow rate of kerosene: (4) Under atmospheric pressure conditions (15℃, 1 atm), if 1 m³ of RP-3 is heated to 85℃, and the heat loss is L = 15 kW, then the heating time required is: Based on the small flow rate pump, calculate the maximum heat exchange flow rate of the small flow rate pump, under atmospheric pressure conditions (15℃, 1 atm), for RP-3 heated to 85℃, as shown in the following formula: When heated, During cooling, Only then can the fuel be directly heated and cooled by the external heat exchanger 4.

[0059] The pipe length is calculated based on Ls = 20 meters, including the length of the spiral tube for heat exchange and cooling. The friction coefficient and relative roughness are 0.005. According to the Moody diagram, , mm, kg / m3, kg / m3.

[0060] (twenty three) Therefore, the friction loss is 1.92 MPa.

[0061] In engineering calculations, local head loss is calculated as 10-15% of the friction loss, so the local loss is 0.2-0.3 MPa, and the total loss is 2.2 MPa.

[0062] Based on the maximum back pressure, oil pump 10 needs to provide a head of at least 7.2 MPa to operate.

[0063] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention 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 the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A flow meter oil supply test system, characterized in that, include: A circulating heat transfer component, comprising a chiller / heater, an internal heat exchanger, and an external heat exchanger, wherein the internal heat exchanger and the external heat exchanger are connected in parallel and through the chiller / heater. A fuel supply component, connected to the circulating heat-conducting component, includes a fuel supply component, a flow test component, a pressure stabilizer component, and a fuel return component. The fuel supply component is disposed outside the inner heat exchanger component, enabling the fuel in the fuel supply component to transfer heat with the inner heat exchanger component. The flow test component is connected to the fuel supply component through the outer heat exchanger component to conduct a fuel supply test on the turbine flow meter under test using fuel at a predetermined temperature. The pressure stabilizer component is connected to the flow test component to stabilize the fuel pressure during the test. The fuel return component is connected to both the pressure stabilizer component and the fuel supply component to return the fuel to the fuel supply component.

2. The flow meter oil supply test system according to claim 1, characterized in that, The external heat exchanger includes a first pipeline, a first switching valve, and an external heat exchanger. One end of the first pipeline is connected to the outlet of the chiller / heater, and the other end is connected to the inlet of the chiller / heater. The first switching valve and the external heat exchanger are both installed on the first pipeline. The internal heat exchanger includes a second pipeline, a second switching valve, and an internal heat exchanger. One end of the second pipeline is connected to the outlet of the chiller / heater, and the other end is connected to the inlet of the chiller / heater. The second switching valve and the internal heat exchanger are both installed on the second pipeline. The second pipeline is connected in parallel with the first pipeline.

3. The flow meter oil supply test system according to claim 2, characterized in that, The oil supply component includes an oil tank, an oil supply power component, and a heating circulation component. The oil tank contains the internal heat exchanger. The oil supply power component is connected to the oil tank in a continuous manner. The heating circulation component is connected to both the oil supply power component and the oil tank in a continuous manner. The oil supply power component includes a third pipeline, a first filter, a third switching valve, and an oil pump. One end of the third pipeline is connected to the oil tank in a continuous manner. The first filter, the third switching valve, and the oil pump are all connected to the third pipeline in a continuous manner. The heating circulation component includes a fourth pipeline and a fourth switching valve. One end of the fourth pipeline is connected to the other end of the third pipeline in a continuous manner, and the other end is connected to the bottom surface of the oil tank in a continuous manner. The fourth switching valve is located on the fourth pipeline.

4. The flow meter oil supply test system according to claim 3, characterized in that, The flow test component includes an oil inlet component, a first standard flow component, and a test flow component. The oil inlet component is connected to the oil supply power component to receive the fuel delivered by the oil pump. The first standard flow component is connected to the oil inlet component, and the test flow component is connected to the first standard flow component to test the turbine flow meter.

5. The flow meter oil supply test system according to claim 4, characterized in that, The oil inlet component includes a fifth pipeline, a fifth switching valve, a sixth pipeline, and a sixth switching valve. One end of the fifth pipeline is connected to the other end of the third pipeline, and the fifth pipeline is connected in series with the external heat exchanger. The fifth switching valve is installed on the fifth pipeline. One end of the sixth pipeline is connected to the other end of the third pipeline, and the sixth pipeline is connected in parallel with the fifth pipeline. The sixth switching valve is installed on the sixth pipeline. The first standard flow component includes a seventh pipeline, a first temperature sensor, a first pressure sensor, an eighth pipeline, a seventh switching valve, a first standard flow meter, a ninth pipeline, and an eighth switching valve. One end of the seventh pipeline is connected to the other ends of both the fifth and sixth pipelines. The first temperature sensor and the first pressure sensor are installed on the seventh pipeline. One end of the eighth pipeline is connected to the other end of the seventh pipeline. The seventh switching valve and the first standard flow meter are both installed on the eighth pipeline. One end of the ninth pipeline is connected to the other end of the seventh pipeline, and the ninth pipeline is connected in parallel with the eighth pipeline. The eighth switching valve is installed on the ninth pipeline.

6. The flow meter oil supply test system according to claim 5, characterized in that, The test flow device includes a tenth pipeline, a ninth switching valve, a turbine flow meter, an eleventh pipeline, a tenth switching valve, a second temperature sensor, and a second pressure sensor. One end of the tenth pipeline is connected to the other end of both the eighth and ninth pipelines. The ninth switching valve and the turbine flow meter are both located on the tenth pipeline. One end of the eleventh pipeline is connected to the other end of both the eighth and ninth pipelines. The tenth switching valve, the second temperature sensor, and the second pressure sensor are all located on the eleventh pipeline. The pressure stabilizing device includes a back pressure tank, a twelfth pipeline, an eleventh switching valve, and a nitrogen cylinder. The back pressure tank is connected to the other end of both the tenth and eleventh pipelines. One end of the twelfth pipeline is connected to the back pressure tank, and the other end of the twelfth pipeline is connected to the nitrogen cylinder. The eleventh switching valve is located on the twelfth pipeline.

7. The flow meter oil supply test system according to claim 6, characterized in that, The oil return system includes a thirteenth pipeline, a twelfth switching valve, a fourteenth pipeline, a first precision needle valve, a fifteenth pipeline, a second precision needle valve, a sixteenth pipeline, a second filter, a thirteenth switching valve, and a fourteenth switching valve. One end of the thirteenth pipeline is connected to the bottom surface of the back pressure tank. The twelfth switching valve is laterally connected to the thirteenth pipeline. One end of the fourteenth pipeline is connected to the other end of the thirteenth pipeline. The first precision needle valve is connected to the fourteenth pipeline. One end of the fifteenth pipeline is connected to the other end of the thirteenth pipeline. The second precision needle valve is connected to the fifteenth pipeline. One end of the sixteenth pipeline is simultaneously connected to the other ends of both the fourteenth and fifteenth pipelines. The second filter is connected to the sixteenth pipeline. The thirteenth switching valve is laterally connected to the sixteenth pipeline. The fourteenth switching valve is connected to the sixteenth pipeline.

8. The test method for the flow meter oil supply test system according to claim 7 in a low flow rate and low temperature difference test scenario, characterized in that, Includes the following steps: S1: Adjust the measurement signals of temperature, pressure, and the first standard flow meter, display the readings correctly, open the first switch valve, close the second switch valve, turn on the heat exchanger for preheating, and set the heat exchanger. S2: Open the third and fourteenth switch valves, ensure that the sixth, seventh, and tenth switch valves are open, and ensure that the eighth, ninth, twelfth, and thirteenth switch valves are closed; S3: Open the eleventh switch valve and pre-charge the back pressure tank according to the turbine flow meter calibration pressure. At this time, the first precision needle valve and the second precision needle valve need to be closed. S4: When the pressure is lower than the pressure tested by the turbine flow meter, the oil pump is turned on after the pressure stabilizes to fill the pipeline system and the back pressure tank with liquid; S5: Adjust the first precision needle valve and the second precision needle valve until the readings of the second temperature sensor, the second pressure sensor and the first standard flow meter simultaneously meet the test conditions of the turbine flow meter, and record the readings of the second temperature sensor, the second pressure sensor and the first standard flow meter. S6: When the stable operating conditions of the test are met for more than 5 minutes, open the ninth switch valve and close the tenth switch valve. If the readings of the first temperature sensor, the first pressure sensor and the first standard flow meter change significantly, then fine-tune the first precision needle valve, the second precision needle valve and the heat exchanger. If the readings change very little or not at all, then the test conditions are met, and then the test on the turbine flow meter begins. S7: During long-term testing, if there are deviations in temperature, pressure, and flow rate, it is necessary to fine-tune the first precision needle valve, the second precision needle valve, and the heating / cooling machine in real time to meet the operating conditions specified in the test. S8: After the test is completed, the heating and cooling machine and the oil pump should be turned off in sequence. When the pressure of the back pressure tank is close to atmospheric pressure, nitrogen should be used to purge the remaining oil in the pipeline, and the fourteenth switch valve and the third switch valve should be closed.

9. The test method for the flow meter oil supply test system according to claim 7 in a high flow rate and high temperature difference test scenario, characterized in that, Includes the following steps: S1: Adjust the measurement signals of temperature, pressure, and the first standard flow meter to ensure correct display of readings, and fully open the first and second switch valves; S2: Preheat the fuel in the fuel tank, open the third switch valve, close the fifth and sixth switch valves, and turn on the fuel pump to circulate the fuel in the fuel tank until the temperature rises to the predetermined temperature; S3: Open the seventh switch valve and pre-charge the back pressure tank according to the turbine flow meter calibration pressure. At this time, the first precision needle valve and the second precision needle valve need to be closed. S4: After the pressure stabilizes, open the fifth switch valve and the oil pump to fill the pipeline system and the back pressure tank with liquid. The liquid level must be at least higher than the outlet of the back pressure tank. S5: Adjust the first precision needle valve and the second precision needle valve until the readings of the second temperature sensor, the second pressure sensor and the first standard flow meter simultaneously meet the test conditions of the turbine flow meter, and record the readings of the first temperature sensor, the first pressure sensor and the first standard flow meter. S6: When the stable operating conditions of the test are met for more than 5 minutes, open the ninth switch valve and close the tenth switch valve. If the readings of the first temperature sensor, the first pressure sensor and the flow meter change significantly, then fine-tune the first precision needle valve, the second precision needle valve and the heat exchanger. If the readings change very little or not at all, then the test conditions are met, and the test of the turbine flow meter begins. S7: If there are deviations in temperature, pressure and flow rate during long-term testing, the first precision needle valve, the second precision needle valve and the heating / cooling machine need to be finely adjusted in real time to meet the operating conditions specified in the test. S8: After the test is completed, the heating and cooling machine and the oil pump should be turned off in sequence. When the pressure of the back pressure tank is close to atmospheric pressure, nitrogen should be used to purge the remaining oil in the pipeline, and the fourteenth switch valve and the third switch valve should be closed.

10. The flow meter oil supply test system according to claim 4, characterized in that, The oil inlet component includes a seventeenth pipeline and a fifteenth switching valve. One end of the seventeenth pipeline is connected to the other end of the third pipeline, and the seventeenth pipeline is connected in series with the external heat exchanger. The fifteenth switching valve is installed on the seventeenth pipeline. The first standard flow component includes an eighteenth pipeline, a second standard flow meter, a third temperature sensor, and a third pressure sensor. One end of the eighteenth pipeline is connected to the other end of the seventeenth pipeline. The second standard flow meter, the third temperature sensor, and the third pressure sensor are all located on the eighteenth pipeline. The test flow component includes a nineteenth pipeline. One end of the nineteenth pipeline is connected to the other end of the eighteenth pipeline and is used to test the connected test turbine flow meter. The oil return component includes a twentieth pipeline, a sixteenth switching valve, a twenty-first pipeline, a third precision needle valve, a twenty-second pipeline, a fourth precision needle valve, and a twenty-third pipeline. The system includes a third filter and a seventeenth switching valve. One end of the twentieth pipeline is connected to the back pressure tank of the pressure stabilizer. One end of the sixteenth switching valve is connected to the back pressure tank. One end of the twentieth pipeline is connected to the other end of the twentieth pipeline. The third precision needle valve is installed on the twentieth pipeline. One end of the twentieth pipeline is connected to the other end of the twentieth pipeline. The fourth precision needle valve is installed on the twentieth pipeline. One end of the twentieth pipeline is connected to both the twentieth and twentieth pipelines. The other end of the twentieth pipeline is connected to the oil tank. The third filter is installed on the twentieth pipeline. One end of the seventeenth switching valve is connected to the oil tank. The flow meter oil supply test system has corresponding usage methods for both small flow rate and low temperature difference test scenarios and large flow rate and high temperature difference test scenarios.

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