Supply system for combustion test bed

Abstract

The utility model relates to a supply system for combustion test stands. The supply system comprises at least two combustion test stands, the number of the main air inlet pipelines corresponds to that of the combustion test beds, each main air inlet pipeline is communicated with all the combustion test beds, and each main air inlet pipeline is provided with a flow regulating valve and an electric heater; the number of the air supply units is larger than that of the main air inlet pipelines, the multiple air supply units are connected with one another through at least one communicating pipeline to form an air supply unit, and the air supply unit is provided with supply ports which are in butt joint with the main air inlet pipelines and correspond to the main air inlet pipelines in number. The parallel gas supply device is compact and reasonable in structure and convenient to operate, the gas supply requirement of a plurality of combustion test beds is met by adopting the mutual combination of a plurality of gas supply units, and the parallel and switching functions of the combustion test beds can be realized at the same time. And meanwhile, the air flow can be accurately controlled, the combustion test bed can be rapidly cooled, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion test benches, in particular to a supply system for a combustion test bench. Background Art

[0002] The combustion test bench plays a vital role in the field of energy and power engineering. The platform deeply explores the coupling process between the flow and reaction of multi-atmosphere nozzles under high temperature and high pressure environment, as well as the related pollutant emission characteristics. Its core goal is to develop advanced combustion technologies with multiple fuels, high efficiency and low emissions. As the core research and development platform for fuel nozzle design and optimization, it can simulate the various complex working conditions faced by nozzles in real gas turbines or other combustion devices. Through this platform, researchers can systematically analyze the aerodynamic characteristics, heat transfer characteristics and combustion behavior of the nozzle, so as to have a detailed understanding of the nozzle's ignition characteristics, emission performance, variable operating condition response and its adaptability to different fuels.

[0003] In order to improve work efficiency, high-performance equipment such as gas turbines, turbochargers, and heat exchangers usually use multiple groups or multiple combustion test benches to work in parallel. In this context, it is particularly important to conduct in-depth research on the working conditions of each combustion test bench. The use of combustion test benches can not only significantly reduce the high cost of installing multiple nozzles in a full-size combustion chamber, but also effectively avoid the risks that may arise from gas turbine turbine machinery during experiments. Therefore, for related companies, this combustion test bench is not only an important means to reduce R&D costs, but also a key facility to improve R&D efficiency.

[0004] In order to further improve the efficiency and responsiveness of the R&D process, the rapid switching function and parallel testing capability of the combustion test bench have become the focus of research. This will help to further shorten the R&D cycle and accelerate the optimization process of burners, fuel nozzles and flame tubes.

[0005] However, in actual application, the combustion test bench still faces a series of technical problems, including the following:

[0006] 1. How to realize the parallel operation or switching function of multiple combustion test benches to meet different test requirements? Traditionally, each combustion test bench corresponds to an air intake pipeline, and the air intake volume of the air intake pipeline is limited by the equipment model and power. Therefore, it is not convenient to control the air intake volume when multiple combustion test benches are operated in parallel / switched.

[0007] 2. How to improve the accuracy of high-temperature and high-pressure gas intake to improve the accuracy of the test.

[0008] 3. When conducting experiments under high temperature and high pressure, how to ensure the safety and stability of the test process and prevent possible accidents.

[0009] For this purpose, we propose a supply system for a combustion test bench. Utility Model Content

[0010] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a supply system for a combustion test bench, which realizes the gas supply requirements for multiple combustion test benches, and can realize the parallel and switching functions of multiple combustion test benches. At the same time, it can also accurately control the flow rate and cool the combustion test bench.

[0011] The technical solution adopted by the utility model is as follows:

[0012] A supply system for a combustion test bench, comprising:

[0013] two combustion test rigs;

[0014] Two main air intake pipes, each of which is connected to two combustion test benches, for supplying a fixed amount of high-temperature and high-pressure gas to the combustion test benches;

[0015] A side air intake duct, which is arranged on one of the main air intake ducts, is connected to a mass flow controller for controlling a small flow of air, and the side air intake duct is respectively connected to the two combustion test benches;

[0016] There are four air supply units, each of which can independently provide high-pressure gas. The four air supply units are interconnected through the same connecting pipe to form an air supply unit. The air supply unit is provided with supply ports corresponding in number to the main air intake pipes for respectively delivering gas to the multiple main air intake pipes.

[0017] It is further characterized by:

[0018] The main air intake pipeline is provided with a solenoid valve, a bypass valve, a mass flow meter, a flow regulating valve, an electric heater and a three-way solenoid valve in sequence starting from the air supply unit end to adjust, heat and distribute the air flow to achieve quantitative high-temperature and high-pressure gas supply.

[0019] The side air intake duct is divided into two branches after passing through the flow controller, and the two branches are respectively provided with solenoid valves, one of which is connected to multiple other main air intake ducts and passes through the electric heater, and the other branch is connected to multiple combustion test benches through a three-way solenoid valve.

[0020] The air supply unit is sequentially connected with an air compressor, a cold dryer, an air storage tank, a filter and a hand valve to provide stable, normal temperature, high pressure and clean air, and the connecting pipeline is located at the rear end of the hand valve.

[0021] Each of the pipelines is provided with a solenoid valve.

[0022] A same generator is connected between the electric heaters of the two main air intake ducts.

[0023] The multiple air supply units are divided into groups with the same number as the main air intake pipes, and each group of air supply units corresponds to the multiple main air intake pipes one by one, each air supply unit in each group is interconnected, and two adjacent groups of air supply units are interconnected.

[0024] When the number of air supply units is twice or more than the number of main air intake pipes, each main air intake pipe corresponds to at least two air supply units, and the number of air supply units in each group is evenly distributed.

[0025] The beneficial effects of the utility model are as follows:

[0026] The utility model has a compact and reasonable structure and is easy to operate. It realizes the air supply requirements of multiple combustion test benches by combining multiple air supply units with a series of precise sensors and actuators. At the same time, it can realize the parallel and switching functions of multiple combustion test benches. At the same time, it can also accurately control the flow rate and can cool the combustion test bench, perform fuel-assisted atomization, organize combustion, etc., thereby improving work efficiency.

[0027] At the same time, the utility model also has the following advantages:

[0028] 1. Through the precise coordination of the control system and the solenoid valve, this system can realize the rapid switching of multiple combustion test benches or conduct tests simultaneously. This design significantly shortens the test preparation time, improves the test efficiency, further improves the parallelism and efficiency of the test, and greatly shortens the R&D cycle and cost of the combustion equipment.

[0029] 2. During the test, the system achieves precise control of air flow through the coordinated work of the bypass valve, flow control valve and mass flow controller. The bypass valve and flow control valve respectively perform coarse and fine adjustments of the flow, while the mass flow controller provides more sophisticated flow control and measurement functions. This design ensures the stability and repeatability of the test conditions and improves the reliability and repeatability of the test data.

[0030] 3. After the test, the system cools the electric heater through a specific combination of solenoid valves without passing through the combustion test bench. This design not only speeds up the cooling of the heating equipment, but also shortens the time of the test end process, thereby reducing time costs and certain labor costs, and also improves the safety of the entire system. At the same time, the cooling method of directly discharging into the atmosphere also avoids the impact of residual heat inside the combustion test bench on subsequent tests, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1It is a schematic diagram of the system flow of the utility model.

[0032] in:

[0033] 1. First air compressor; 2. Second air compressor; 3. Third air compressor; 4. First cold dryer; 5. Second cold dryer; 6. Third cold dryer; 7. First air storage tank; 8. Second air storage tank; 9. Third air storage tank; 10. First filter; 11. Second filter; 12. Third filter; 13. First pressure reducing valve; 14. Second pressure reducing valve; 15. Third pressure reducing valve; 16. First hand valve; 17. Second hand valve; 18. Third hand valve; 19. First solenoid valve; 20. Second solenoid valve; 21. Third solenoid valve; 22. Fourth solenoid valve; 23. Fifth solenoid valve; 24. First pressure sensor; 25. Second pressure sensor; 26. Third pressure sensor; 27. Sixth solenoid valve; 28. Seventh solenoid valve; 29. ​​First thermocouple; 30. the second thermocouple; 31, the first bypass valve; 32, the second bypass valve; 33, the first mass flowmeter; 34, the second mass flowmeter; 35, the mass flow controller; 36, the first flow regulating valve; 37, the second flow regulating valve; 38, the eighth solenoid valve; 39, the ninth solenoid valve; 40, the tenth solenoid valve; 41, the eleventh solenoid valve; 42, the first electric heater; 43, the generator; 44, the second electric heater; 45, the third thermocouple; 46, the fourth thermocouple; 47, the fifth thermocouple; 48, the fourth pressure sensor; 49, the fifth pressure sensor; 50, the sixth pressure sensor; 51, the first three-way solenoid valve; 52, the second three-way solenoid valve; 53, the third three-way solenoid valve; 54, the first combustion test bench; 55, the second combustion test bench. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0036] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0037] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0038] In the description of the embodiments of the present application, the term "and / or" is only used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0039] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0040] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0041] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0042] As described in the background technology, improving the efficiency and response speed of the R&D process and implementing multiple combustion test benches are necessary technical means to improve efficiency. At the same time, how to ensure the rapid switching function and parallel testing capability of multiple combustion test benches has become the focus of research.

[0043] Based on the above considerations, in order to solve the difficulties encountered by traditional combustion test benches in parallel and switching, that is, the combustion test bench cannot meet the requirements of parallel and switching due to limited air intake. In other words, when multiple combustion test benches require a large air intake, usually the separate air intake pipe of each combustion test bench cannot meet its air intake, and multiple air intake pipes are required for supply. In this case, the traditional combustion test bench cannot achieve parallel operation and can only switch, and switching requires additional control of the air intake, which increases operational difficulties and reduces test accuracy.

[0044] See also Figure 1 According to some embodiments of the present application, a supply system for a combustion test bench is provided. The system realizes rapid switching and support for simultaneous testing of two groups of combustion test benches through the close cooperation of multiple sets of air supply units, sensors and control systems, greatly improving the efficiency and flexibility of combustion tests.

[0045] like Figure 1 As shown, the utility model relates to a supply system for a combustion test bench, which is particularly suitable for combustion tests that require high-precision gas supply. Through this system, quantitative supply of high-temperature and high-pressure gas to two combustion test benches can be achieved, and at the same time, small-flow air supply can be flexibly controlled.

[0046] The system mainly includes two combustion test benches, two main air intake ducts, one side air intake duct and four air supply units.

[0047] Firstly, the system is equipped with two combustion test benches, which can conduct combustion tests independently or simultaneously, thus improving the efficiency and flexibility of the test.

[0048] Secondly, each combustion test bench is supplied with gas through a main air intake pipe. These two main air intake pipes can supply a fixed amount of high-temperature and high-pressure gas to the two combustion test benches respectively to meet the gas demand during the test. By accurately controlling the amount and pressure of gas supplied to each combustion test bench, various actual working environments can be simulated, thereby improving the accuracy and reliability of the test.

[0049] In addition, the system is specially designed with a side air intake duct, which is connected to one of the main air intake ducts. A mass flow controller is installed on the side air intake duct, which can accurately control the small air flow supply. The side air intake duct is also connected to the two combustion test benches, so that the air flow can be flexibly adjusted as needed during the test, further enhancing the flexibility and controllability of the test.

[0050] Finally, the system includes four gas supply units, each of which can independently provide high-pressure gas. The four gas supply units are interconnected through the same connecting pipe to form an integrated gas supply system. The gas supply units are provided with supply ports corresponding to the number of main air intake pipes, through which gas can be delivered to multiple main air intake pipes respectively. This design not only ensures sufficient gas supply, but also makes the system more stable and reliable.

[0051] In actual operation, according to the test requirements, the output pressure and flow of the gas supply unit and the set value of the mass flow controller can be adjusted to accurately control the amount and composition of the gas supplied to the combustion test bench. In this way, various complex working environments can be simulated to conduct more in-depth research and analysis on the combustion test.

[0052] Embodiment 1

[0053] A supply system for a combustion test bench, such as Figure 1 As shown, in this embodiment, two combustion test benches are taken as examples.

[0054] In this embodiment, two main air intake pipes are provided, which correspond to the first combustion test bench 54 and the second combustion test bench 55 respectively. In this field, two combustion test benches can basically meet the existing needs;

[0055] and a plurality of air supply units connected to the main air intake duct, the air supply units are used to provide stable, high-pressure and clean air to the main air intake duct. In this embodiment, four air supply units are used as an example;

[0056] Each main air intake pipeline corresponds to at least one air supply unit, that is, each main air intake pipeline is connected to at least one air supply unit to deliver air to the main air intake pipeline, which can overcome the situation that a single air supply unit in the combustion test bench cannot meet the air intake demand;

[0057] Each main air intake pipeline is provided with a solenoid valve (sixth solenoid valve 27, seventh solenoid valve 28), a bypass valve (first bypass valve 31, second bypass valve 32), a mass flow meter (first mass flow meter 33, second mass flow meter), a flow regulating valve (first flow regulating valve 36, second flow regulating valve 37), an electric heater (first electric heater 42, second electric heater 44) and a three-way solenoid valve (first three-way solenoid valve 51, second three-way solenoid valve 52) in sequence from the air supply unit end, which can adjust the air flow and heat it at the same time to achieve quantitative high-temperature and high-pressure gas to meet the needs of high-temperature and high-pressure combustion tests;

[0058] And the same generator 43 is connected between the electric heaters of the two main air intake ducts;

[0059] At least one of the multiple main air intake pipes is provided with a side air intake pipe, and the side air intake pipe is connected with a mass flow controller 35. The mass flow controller 35 can control a small flow of gas, which is different from a flow regulating valve that can control a large flow of gas. The side air intake pipe can be used to fine-tune the gas and provide accurate small flow of gas to meet the experimental requirements of the combustion test bench. At the same time, it can also realize cooling of the heater after the combustion test bench completes the test.

[0060] Therefore, the side air intake duct is divided into two branches after passing through the flow controller 35, and the two branches are respectively provided with solenoid valves, one of the branches is connected to the other main air intake duct (not the separated main air intake duct) and passes through the electric heater, and then is connected to the two combustion test benches respectively through the first three-way solenoid valve 51, and the other branch is also connected to the two combustion test benches respectively through the third three-way solenoid valve 53.

[0061] Therefore, it can meet the heating function of the side air intake duct and the test requirements of the combustion test bench. At the same time, it can also cool down specific components through low-temperature gas without going through an electric heater, assist in atomization of the fuel nozzle, and organize combustion in the combustion chamber head.

[0062] Air supply unit

[0063] The system includes multiple independent air supply units, each of which is composed of key components such as air compressor, cold dryer, air storage tank, filter, hand valve and solenoid valve. These components work together to provide the system with stable, high-pressure and clean air.

[0064] At the same time, the multiple air supply units are divided into multiple groups with the same number of main air intake pipes. In this embodiment, the number of main air intake pipes is 2, that is, the multiple air supply units are divided into two groups. At the same time, the air supply units on the same side are divided into one group with the center line of the two main air intake pipes as the boundary, and the multiple air supply units in the same group are connected to the main air intake pipe through at least one connecting pipe, and each connecting pipe is provided with a solenoid valve;

[0065] Specifically, in this embodiment, the air compressors: the first, second, and third air compressors (1, 2, 3) are the core power sources of the system, capable of providing stable, high-pressure air. The total air supply of the multiple air compressors is designed to meet the maximum air demand of the two groups of combustion test benches, ensuring that the combustion test benches have sufficient air sources for high-temperature and high-pressure combustion tests.

[0066] Cold dryer: The first, second and third cold dryers (4, 5, 6) are used in conjunction with the air compressor to effectively remove moisture from the compressed air, ensure the dryness of the air, and prevent test errors or equipment damage caused by moisture.

[0067] Air storage tank: The first, second and third air storage tanks (7, 8, 9) play the role of stabilizing the air pressure. They can adapt to the instant start and stop characteristics of the air compressor, ensure that the air pressure fluctuates within a certain range, and provide a stable air supply for the test.

[0068] Filter: The first, second and third filters (10, 11, 12) are responsible for filtering the oil mist generated by the air compressor in the air flow channel and various impurities in the air to ensure the quality of the air supplied to the combustion test bench.

[0069] Manual valve and solenoid valve: They are the key to the control of the system. They can manually shut off the gas supply when the solenoid valve fails to work, ensuring the safety of the system.

[0070] The first, second and third manual valves (16, 17, 18) are respectively located on each air supply unit and control the opening and closing amount of each air intake pipeline by manual control.

[0071] Solenoid valve: The first, second and third solenoid valves (19, 20, 21) are also located on each gas supply unit and control the opening and closing amount of the pipeline by electronic control.

[0072] The fourth and fifth solenoid valves (22, 23) are located on the connecting pipeline to control the gas connection between each gas supply unit and the main air intake pipeline;

[0073] The sixth and seventh solenoid valves (27, 28) are located on the main air intake pipeline and control the opening and closing amount of the main air intake pipeline.

[0074] These multiple air supply units are independent of each other, but can work together through the control system to provide flexible and reliable air supply for combustion tests.

[0075] Control systems and sensors

[0076] To ensure the accuracy and safety of the test, the system is equipped with a complete control system and a variety of sensors. The control system receives real-time data from the sensors and accurately controls the air supply to meet the needs of different tests.

[0077] Pressure sensor: The first, second and third pressure sensors (24, 25, 26) and the fourth, fifth and sixth pressure sensors (48, 49, 50) are distributed at key locations of the system to monitor the air pressure in real time and ensure that the pressure is within a set range.

[0078] Thermocouples: The first, second, third, fourth and fifth thermocouples (29, 30, 45, 46, 47) are used to measure the temperature of key parts of the system to prevent equipment damage or test errors caused by excessive temperature.

[0079] Mass flow meter: The first and second mass flow meters (33, 34) and the mass flow controller (35) provide accurate flow measurement and control functions. They can ensure that the air flow supplied to the combustion test bench is stable and meets the test requirements.

[0080] Solenoid valve and valve control

[0081] The sixth and seventh solenoid valves (27, 28) and the eighth, ninth, tenth and eleventh solenoid valves (38, 39, 40, 41) work in coordination to achieve rapid switching or simultaneous testing of two groups of combustion test benches (54, 55).

[0082] The first, second and third three-way solenoid valves (51, 52, 53) meet the control requirements of three-way air supply, including two main air supplies and one auxiliary air supply. They are key components for realizing rapid switching and simultaneous testing of the combustion test bench.

[0083] The first and second bypass valves (31, 32) are used for rough control of the main air, and cooperate with the first and second flow control valves (36, 37) to achieve more precise flow control. The mass flow controller (35) is responsible for the fine control of the auxiliary air.

[0084] Embodiment 2

[0085] An operating method for a supply system for a combustion test bench, the specific operating method comprising:

[0086] 1. When the gas volume provided by the gas supply unit in each group can meet the test requirements of the corresponding combustion test bench, the solenoid valve in the group and the solenoid valve of the corresponding main air intake pipeline will be opened to realize gas supply, so that multiple combustion test benches can be tested in parallel;

[0087] 2. When the gas volume provided by the gas supply unit in one group cannot meet the test requirements of the corresponding combustion test bench, and the gas supply unit of the adjacent group can meet the corresponding supply volume and the supply volume requirements of this group, the solenoid valve of the group adjacent to this group will be opened to replenish the gas of the adjacent group into this group, so as to meet the test requirements of the corresponding combustion test bench of this group;

[0088] 3. When the gas volume provided by two or more adjacent groups of gas supply units cannot meet the test requirements of the corresponding combustion test bench, the solenoid valves of this group and the adjacent group or groups are opened to realize the collection of the intake volume, and the three-way valve is used to cut the corresponding combustion test benches of the adjacent group or groups, so that only the corresponding gas is added to this group, so as to meet the test requirements of this group;

[0089] Through the precise coordination of the control system and the solenoid valve, this system can realize the rapid switching of multiple combustion test benches or conduct tests simultaneously. This design significantly shortens the test preparation time, improves the test efficiency, and further enhances the parallelism and efficiency of the test.

[0090] 4. When the flow needs to be finely adjusted during the test, the solenoid valve of the side air intake line is opened, and a small flow of gas can be delivered through the mass flow controller, so as to fine-tune the gas volume. Then, the corresponding solenoid valve can be opened to heat the gas, and a small flow of high-temperature and high-pressure gas can be provided, thereby improving the accuracy of the test.

[0091] During the test, the system achieves precise control of air flow through the coordinated work of the bypass valve, flow control valve and mass flow controller. The bypass valve and flow control valve respectively perform coarse and fine adjustments of the flow, while the mass flow controller provides more sophisticated flow control and measurement functions. This design ensures the stability and repeatability of the test conditions and improves the reliability of the test data.

[0092] 5. When cooling is required after the test process is completed, the solenoid valve and three-way valve on the side air intake duct are opened, and a small flow of gas in the side air intake duct is supplied to the corresponding combustion test bench without passing through the electric heater, thereby achieving a cooling effect.

[0093] After the test, the system cools the electric heater through a specific combination of solenoid valves without passing through the combustion test bench. This design not only speeds up the cooling of the equipment and shortens the test cycle, but also improves the safety of the entire system. At the same time, the cooling method of directly discharging into the atmosphere also avoids the impact of residual heat inside the combustion test bench on subsequent tests.

[0094] In summary, the utility model realizes the air supply requirements for multiple combustion test benches by combining multiple air supply units with a series of precise sensors and actuators, and can realize the parallel and switching functions of multiple combustion test benches. It can also accurately control the flow rate and quickly cool down the combustion test bench, thereby improving work efficiency.

[0095] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A supply system for a combustion test bench, characterized in that: include: two combustion test rigs; Two main air intake pipes, each of which is connected to two combustion test benches, for supplying a fixed amount of high-temperature and high-pressure gas to the combustion test benches; A side air intake duct, which is arranged on one of the main air intake ducts, is connected to a mass flow controller for controlling a small flow of air, and the side air intake duct is respectively connected to the two combustion test benches; There are four air supply units, each of which can independently provide high-pressure gas. The four air supply units are interconnected through the same connecting pipe to form an air supply unit. The air supply unit is provided with supply ports corresponding in number to the main air intake pipes for respectively delivering gas to the multiple main air intake pipes.

2. A supply system for a combustion test bench according to claim 1, characterized in that: The main air intake pipeline is provided with a solenoid valve, a bypass valve, a mass flow meter, a flow regulating valve, an electric heater and a three-way solenoid valve in sequence starting from the air supply unit end to adjust, heat and distribute the air flow to achieve quantitative high-temperature and high-pressure gas supply.

3. A supply system for a combustion test bench according to claim 2, characterized in that: The side air intake duct is divided into two branches after passing through the flow controller, and the two branches are respectively provided with solenoid valves, one of which is connected to multiple other main air intake ducts and passes through the electric heater, and the other branch is connected to multiple combustion test benches through a three-way solenoid valve.

4. A supply system for a combustion test bench according to claim 1, characterized in that: The air supply unit is sequentially connected with an air compressor, a cold dryer, an air storage tank, a filter and a hand valve to provide stable, normal temperature, high pressure and clean air, and the connecting pipeline is located at the rear end of the hand valve.

5. A supply system for a combustion test bench according to any one of claims 1 to 4, characterized in that: Each of the pipelines is provided with a solenoid valve.

6. A supply system for a combustion test bench according to claim 5, characterized in that: A same generator is connected between the electric heaters of the two main air intake ducts.

7. A supply system for a combustion test bench according to claim 6, characterized in that: The multiple air supply units are divided into groups with the same number as the main air intake pipes, and each group of air supply units corresponds to the multiple main air intake pipes one by one, each air supply unit in each group is interconnected, and two adjacent groups of air supply units are interconnected.

8. A supply system for a combustion test bench according to claim 7, characterized in that: When the number of air supply units is twice or more than the number of main air intake pipes, each main air intake pipe corresponds to at least two air supply units, and the number of air supply units in each group is evenly distributed.

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