Rotating disc cavity test platform gas supply system

Abstract

The application discloses a rotating disc cavity test platform air supply system, which comprises a main air inlet system and a cold air inlet system. The main air inlet system and the cold air inlet system are connected with test pieces respectively and provide main air flow and secondary flow required by tests in terms of flow, temperature and pressure. The main air inlet system comprises a main air inlet valve, an air inlet filter, an expansion joint, an air inlet flow meter and a warmer arranged in sequence. A main air exhaust branch connected with an exhaust system is arranged between the main air inlet valve and the air inlet filter. A main air branch connected with the cold air inlet system is arranged between the air inlet filter and the expansion joint. The warmer is provided with an air flow output pipeline connected with the test piece. The cold air inlet system comprises a cold air inlet valve, a cold air filter, a mixing device, a cold air main path expansion joint and a cold air distributor arranged in sequence. The cold air distributor is connected with a plurality of cold air distribution branches. Cold air flow meters and cold air warmers are arranged in sequence on the cold air distribution branches. Cold air output pipelines connected with the test pieces are arranged on the cold air warmers.

Description

Technical Field

[0001] This invention relates to the field of engine disc cavity heat exchange testing technology, and more specifically, to a rotating disc cavity test platform air supply system. Background Technology

[0002] An aero-engine is a typical high-speed rotating machine. The turbine disk is an important component of an aero-engine, and the chamber formed by the turbine disk and its surrounding stator components is called the rotating disk cavity. The performance of the rotating disk cavity directly affects the overall operating condition of the aero-engine. When testing the rotating disk cavity, it is usually necessary to simulate the actual operating conditions of the entire engine. The air intake situation of an engine is complex during operation, generally involving more than one intake path. However, in traditional operations, when conducting flow and heat transfer tests on the engine's rotating disk cavity, only one intake path is often simulated. For example, patent CN108332975B discloses a 1.5-stage turbine rotating disk cavity flow heat transfer basic test rig, which includes a 1.5-stage turbine, a braking and boosting compressor, a mixer, and a cooling system. The 1.5-stage turbine and the braking and boosting compressor are coaxial. The first primary air intake pipe is directly connected to the mixer, and the second primary air intake pipe is connected to the braking and boosting compressor. The outlet of the braking and boosting compressor is connected to the first and second outlet pipes of the compressor. The first outlet pipe of the compressor is connected to the mixer, and the second outlet pipe of the compressor is connected to the exhaust pipe through an exhaust fan. The outlet pipe of the mixer is connected to the inlet of the 1.5-stage turbine, and the outlet of the 1.5-stage turbine is connected to the exhaust pipe through an exhaust fan. This invention mentions that it can not only conduct long-period, high-flow-rate experimental research on turbine gas dynamics, but also conduct research on mechanistic issues involving a large number of aerodynamics, heat transfer, multi-field coupling, and multiphase flow.

[0003] Looking at the technical solutions of the aforementioned patents, although they include a first intake pipe and a second intake pipe, these two intake pipes do not both directly enter the compressor rotating disk cavity. According to the specification, "The primary air system draws in air through the intake pipe, part of which is compressed by the brake compressor and the booster compressor 9 and enters the mixer 8, while the other part directly enters the mixer 8. The flow distribution ratio is calculated based on experimental conditions and objectives and controlled by two branch valves; the fuel quantity control of the combustion chamber heater inside the mixer is similar; the high-temperature, high-pressure gas enters the 1.5-stage turbine test section and fully expands..." The power output provides all or part of the power to the braking and booster compressors. When the power output of the turbine test section is insufficient to provide the power to the braking and booster compressors, an electric motor provides auxiliary power. After power output, the exhaust gas is drawn in by the exhaust fan and discharged through the exhaust pipe. The secondary air system draws in air through the intake pipe to the screw compressor, where it is pressurized and then enters the gas dryer. This dryer dehumidifies and cools the air before storing it in the storage tank. The amount of cool air entering the 1.5-stage turbine test section is allocated according to the required amount of cool air. It can be seen that only the cool air entering through the secondary air system is used in the rotating disc test section. Therefore, this patented technology still cannot fully simulate the actual intake conditions of the engine. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an air supply system for a rotating disk cavity test platform with two air intakes to deeply simulate the air intake conditions of an engine.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A rotary disc cavity test platform air supply system includes a main air intake system and a cold air intake system. The main air intake system is connected to the test piece and provides the test piece with the main airflow with the required flow rate, temperature and pressure. The cold air intake system is connected to the test piece and provides the test piece with the required secondary airflow with the required flow rate, temperature and pressure.

[0007] The main air intake system includes a main air intake valve, an intake filter, an expansion joint, an intake flow meter, and a heater connected in sequence through pipe sections; the pipe section between the main air intake valve and the intake filter is provided with a main air vent branch connected to the exhaust system, the pipe section between the intake filter and the expansion joint is provided with a main air branch connected to the cold air intake system, and an airflow output pipe connected to the test piece is installed on the heater.

[0008] The cold air intake system includes a cold air intake valve, a cold air filter, a mixer, a cold air main expansion joint, and a cold air distributor connected in sequence through pipe sections. The cold air distributor is connected to multiple cold air distribution branches. Each cold air distribution branch is equipped with a cold air flow meter and a cold air heater in sequence. Each cold air heater is equipped with a cold air output pipe connected to the test piece.

[0009] Furthermore, the main gas intake system has a main gas auxiliary regulating branch on the pipe section between the flow meter and the heater.

[0010] Furthermore, the airflow output pipe is equipped with a main gas emergency venting pipe, which is connected to the exhaust system.

[0011] Furthermore, the intake filter is a multi-core gas filter, with a design temperature of 550℃, a design pressure of 1.2MPa, and a design flow rate of 2500m³. 3 / h, with a filtration accuracy of 10um or higher.

[0012] Furthermore, the heater is designed to reach a temperature of 560°C and a pressure of 1.1 MPa.

[0013] Furthermore, the intake flow meter is a Rosemount orifice plate flow meter.

[0014] Furthermore, the section of pipe between the main cold air expansion joint and the cold air distributor in the cold air intake system is also equipped with an auxiliary regulating branch for cold air mixing.

[0015] Furthermore, venting bypasses are also provided on the pipe section between the cold air intake valve and the cold air filter in the cold air intake system, and on the pipe section between the cold air main expansion joint and the auxiliary regulating branch after cold air mixing.

[0016] Furthermore, the mixer includes a mixing cylinder and a main gas release pipeline placed inside the mixing cylinder. The main gas release pipeline includes an interconnected annular pipe section and an inlet pipe section. The inlet pipe section penetrates the wall of the mixing cylinder and is connected to the main gas branch of the main gas inlet system. Multiple through holes are densely distributed on the wall of the annular pipe section for main gas release.

[0017] Furthermore, each cold air output pipe in the cold air intake system is equipped with an emergency cold air venting branch, which is connected to the exhaust system.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention combines a main air intake system and a cold air intake system, which, compared to traditional rotating disk cavity flow heat transfer experiments, can fully study the effects of changes in secondary flow rate, temperature, pressure and other parameters on disk cavity flow and heat transfer. Attached Figure Description

[0020] Figure 1 This is a structural block diagram of the rotating disk cavity test platform described in Embodiment 1 of the present invention;

[0021] Figure 2This is an overall installation diagram of the rotating disk cavity test platform described in Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the main air intake system described in Embodiment 1 of the present invention;

[0023] Figure 4 for Figure 3 Structural principle diagram of the main air intake system;

[0024] Figure 5 This is a schematic diagram of the cold air intake system described in Embodiment 1 of the present invention;

[0025] Figure 6 for Figure 5 Structural principle diagram of the intercooler intake system;

[0026] Figure 7 This is a schematic diagram of the structure of the mixer described in Embodiment 1 of the present invention;

[0027] Figure 8 This is a schematic diagram of the exhaust system described in Embodiment 1 of the present invention;

[0028] Figure 9 for Figure 8 Structural schematic diagram of the central exhaust system;

[0029] Figure 10 This is a schematic diagram of the cooling section described in Embodiment 1 of the present invention;

[0030] Figure 11 This is a schematic diagram of the power transmission system described in Embodiment 1 of the present invention;

[0031] Figure 12 This is a structural diagram of the test platform used in Embodiment 1 of the present invention to debug the test specimen and verify the performance indicators and functions of the test platform. Detailed Implementation

[0032] To clearly illustrate the technical features of this solution, the following detailed description, in conjunction with the accompanying drawings, will explain the technical solution in detail.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0034] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0037] Example 1

[0038] One such Figure 1 and Figure 2The rotating disc test platform shown includes a main air intake system 1, a cold air intake system 2, an exhaust system 3, a power transmission system 4, a lubrication system, a cooling water system, and a data acquisition system. The main air intake system 1 is connected to the test piece and provides the test piece with the main airflow required for the test, including the required flow rate, temperature, and pressure. The cold air intake system 2 is connected to the test piece and provides the test piece with the secondary airflow required for the test, including the required flow rate, temperature, and pressure. The exhaust system 3 is used for exhausting the test piece. The main air intake system 1 and the cold air intake system 2 are respectively connected to the exhaust system 3. The power transmission system 4 is used to drive the test piece to rotate. The lubrication system is used to lubricate the test piece and the power transmission system. The cooling water system is connected to the lubrication system and is used for cooling the lubricating oil in the lubrication system. The data acquisition system is used for measuring, collecting, processing, displaying, and storing the performance parameters of the test piece and the operating data of the test platform.

[0039] Main air intake system such as Figure 3 As shown, it includes a main air intake valve 110, an intake filter 11, an expansion joint 12, a flow meter 13, and a heater 14 connected in sequence by pipe sections; a main air vent branch 15 connected to the exhaust system is provided on the pipe section between the main air intake valve 110 and the intake filter 11, and a main air vent valve 111 is provided on the main air vent branch; a main air regulating valve 112 is provided on the pipe section between the intake filter 11 and the expansion joint 12; a main air branch 16 connected to the cold air intake system 2 is also provided between the main air regulating valve 112 and the intake filter 11, and a main air branch regulating valve 112 is provided on the main air branch. A gas flow output pipe 17 connected to the test piece is installed on the throttle valve 113 and the heater 14. The gas flow output pipe is equipped with a main gas emergency vent pipe 18. A main gas emergency vent valve 114 is installed on the main gas emergency vent pipe. The main gas emergency vent pipe 18 is connected to the exhaust system 3. A main gas main regulating valve 115 is installed on the pipe section between the flow meter 13 and the heater 14. In order to further improve the accuracy of the gas supply pressure, a main gas auxiliary regulating branch 19 is connected to both ends of the main gas main regulating valve 115. A main gas auxiliary regulating valve 116 is installed on the main gas auxiliary regulating branch. The main gas auxiliary regulating valve is used for fine adjustment of air pressure.

[0040] The aforementioned air intake filter 11 is designed for a temperature of 550℃, a pressure of 1.2MPa, and a flow rate of 2500m³ / h. 3 / h, with a filtration accuracy of over 10um; the heater 14 is designed to reach a temperature of 560℃ and a pressure of 1.1MPa.

[0041] The main gas in the main gas intake system 1 comes from a common gas source. The main gas source has a pressure of 1.0 MPa, a flow rate of (1 to 6.5) kg / s that is continuously adjustable, and a pressure of (300 to 800) K that is continuously adjustable. The pressure and flow rate are adjusted to the required test pressure through a pressure regulating valve and a bypass venting valve. The temperature of the main gas is adjusted over a large range by a centralized heating system of the common gas source, and adjusted over a small range by a heater.

[0042] See the schematic diagram of the main air intake system. Figure 4 Before the test, the main air shut-off valve V101, main air regulating valve V103, main air branch regulating valve V104, main air main regulating valve V105, main air auxiliary regulating valve V106, and main air emergency vent valve V107 are closed, while the main air vent valve V102 is fully open. During the test, the main air shut-off valve V101 is opened, and 1MPa@800K high-temperature compressed air from the common air source enters the main air intake system. The pressure is initially regulated by adjusting the main air vent valve V102 through bypass venting to bring the high-temperature air pressure P2 after the intake filter to the set value. The airflow at the intake filter outlet is divided into two paths: one path enters the main air main regulating valve V105 through the main air regulating valve V103; the other path is introduced into the cold air intake system through the main air branch regulating valve V104. The high-temperature air inlet pressure P3 of the test piece is adjusted through the main air main regulating valve V105. The flow area of ​​the main gas auxiliary regulating valve V106 is approximately 25% of that of the main gas regulating valve V105. When the test specimen inlet pressure P3 reaches within 10% of the target pressure value, the test specimen inlet pressure P3 can be accurately brought to the set target value simply by adjusting the main gas auxiliary regulating valve V106. After passing through the main gas regulating valve V105 and the main gas auxiliary regulating valve V106, the air is heated by the heater T101 to accurately reach the target value of the test specimen inlet air temperature T2. The main gas emergency venting line installed after the heater T101 ensures test safety. The main gas emergency venting valve V107 installed on the venting line is used for emergency venting. During the venting process, the air can carry away the residual heat of the heating tube in the heater T101, preventing damage to the heater.

[0043] The main technical parameters of the main air intake system are as follows: test specimen air intake flow rate: 0~2kg / s continuously adjustable; test specimen air intake pressure: (0.1~1)MPa continuously adjustable; test specimen air intake temperature: (300~800)K continuously adjustable; temperature adjustment accuracy: ±2K; pressure adjustment accuracy: ±1%FS; flow rate adjustment accuracy: ±1%FS.

[0044] air conditioning intake system such as Figure 5As shown, it includes a cold air inlet valve 210, a cold air filter 21, a mixer 22, a cold air main expansion joint 23, and a cold air distributor 24 connected in sequence through a pipe section. Multiple cold air distribution branches 25 are connected to the cold air distributor 24. A flow meter 26 and a cold air heater 27 are installed in sequence on each cold air distribution branch. A cold air outlet pipe 28 connected to the test piece is installed on each cold air heater 27. A cold air distribution branch regulating valve 211 and a cold air distribution branch flow meter 212 are installed in sequence on the cold air outlet pipe 28. The pipe section between the cold air main expansion joint 23 and the cold air distributor 24 in the cold air inlet system... It is also equipped with a main regulating valve 213 after cold air mixing, and auxiliary regulating branches 29 after cold air mixing are set at both ends of the main regulating valve after cold air mixing. Auxiliary regulating valves 214 after cold air mixing are set on the auxiliary regulating branches after cold air mixing. Each cold air output pipe 28 in the cold air intake system is equipped with an emergency cold air release branch 291, which is connected to the exhaust system 3. An emergency cold air release valve 215 is set on the emergency cold air release branch. The emergency cold air release valve 215 is used for emergency release to ensure test safety. During the release process, the air can carry away the residual heat of the heating tube in the cold air heater 27 to prevent damage to the heater. A venting bypass is provided on the pipe section between the air intake valve and the air filter, and an air venting valve 216 is installed on the venting bypass. A pre-mixing regulating valve 217 is provided on the pipe section between the air filter 21 and the mixer 22. A venting bypass is also provided on the pipe section between the main air expansion joint 23 and the auxiliary regulating branch 29 after air mixing, and a post-mixing venting valve 218 is installed on the venting bypass. Both of the above venting bypasses are connected to the exhaust system.

[0045] The function of mixer 22 is to mix the compressed air from the main gas branch inlet and the cold gas inlet in the main gas intake system to form mixed gas. The mixed gas is then regulated to the required pressure and flow rate for the test by a pressure regulating valve and a bypass vent valve. The cold gas in the cold gas intake system also comes from a common gas source. The cold gas pressure is 1.0 MPa, continuously adjustable from 0 to 1 kg / s, and continuously adjustable from 300 to 800 K. The temperature of the cold gas is adjusted over a large range by the common gas source centralized heating system and the mixer, and adjusted over a small range by the cold gas heater. According to the requirements of this test bench, the maximum flow rate of the main gas is 2 kg / s, and the maximum flow rate of the cold gas is 2 kg / s. Therefore, the design is based on a main gas intake of 3 kg / s and a cold gas intake of 1 kg / s. Then, a 1 kg / s gas is drawn from the main gas intake, passes through the mixer, and enters the cold gas flow path. Finally, a 2 kg / s main gas flow rate and a 2 kg / s cold gas flow rate are formed. The mixer is as follows: Figure 7As shown, the mixer includes a mixing cylinder 221 and a main gas release pipeline placed inside the mixing cylinder. The main gas release pipeline includes an interconnected annular pipe section 222 and an inlet pipe section 223. The inlet pipe section 223 penetrates the wall of the mixing cylinder 221 and is connected to the main gas branch 16 in the main gas intake system. Multiple through holes are densely distributed on the wall of the annular pipe section 222 for main gas release. This mixer structure features high efficiency, fast mixing, and low pressure loss.

[0046] like Figure 5 As shown, in this embodiment, the air distributor 24 stably distributes the flow of the four branches, ensuring that the air can be quickly, efficiently, and stably adjusted during various flow, temperature, and pressure parameter tests across the entire operating range, maximizing the capacity of the air intake system. The air distributor is designed with a vertical structure, with the outlet flanges arranged symmetrically in two layers. The installation space for the flow meter, flanges, and insulation layer was considered when arranging the air supply branches. It is made of 06Cr19Ni10 stainless steel, with a pressure resistance of 1.0MPa and a temperature resistance of 650K.

[0047] See the schematic diagram of the air intake system. Figure 6Before the test, the following valves were closed: cold air shut-off valve V201, cold air mixing pre-regulating valve V203, cold air mixing post-main regulating valve V205, cold air mixing post-auxiliary regulating valve V206, four cold air distribution branch regulating valves V211 / V212 / V213 / V214, and four emergency venting valves V207 / V208 / V209 / V210. The cold air venting valve V202 and the cold air mixing post-venting valve V204 were fully open. During the test, the cold air shut-off valve V201 was opened, and 1MPa@650K compressed air from the air source station entered the cold air intake system. The pressure was initially regulated by adjusting the cold air venting valve V202 through bypass venting, so that the air pressure P5 after the cold air filter reached the set value. The airflow from the cold air filter outlet was supplied to the mixer through the cold air mixing pre-regulating valve V203. In the mixer, cold air mixes with high-temperature air introduced from the main air branch, bringing the mixer outlet air temperature T4 to the set value. The maximum difference between T4 and the target air temperature at the test specimen inlet is -10℃, which can typically be set to -5℃. A cold air vent valve V204, installed at the mixer outlet, stabilizes the airflow and temperature passing through the mixer. This valve is linked (one open, one closed) with the cold air mixing main regulating valve V205 to adjust the cold air inlet pressure P6 of the test specimen. The cold air vent valve V204, the cold air mixing main regulating valve V205, and the inlet pressure P6 form a closed-loop control system. A cold air mixing auxiliary regulating valve V206, connected in parallel with the cold air mixing main regulating valve V205, further improves the accuracy of the air supply pressure, allowing for fine-tuning of the air pressure. The flow area of ​​the auxiliary regulating valve V206 after cold air mixing is approximately 25% of that of the main regulating valve V205 after cold air mixing. When the inlet pressure P6 of the test specimen reaches within 10% of the target pressure value, the inlet pressure P6 of the test specimen is accurately brought to the set target value simply by adjusting the auxiliary regulating valve V206. Air enters the cold air distributor after passing through the main regulating valve V205 and the auxiliary regulating valve V206 after cold air mixing, and is then divided into four branches to supply the test specimen. Each branch is heated by its own cold air heater to accurately raise the air temperature to the target value required for the inlet air temperature of the test specimen. Each branch is regulated by its own cold air distribution branch regulating valve to adjust the air pressure to the target value required for the inlet air pressure of the test specimen.

[0048] The main technical parameters of the air intake system are as follows: Air intake flow rate of the test specimen: Air distribution branch 1: 0~1kg / s continuously adjustable; Air distribution branch 2 and branch 3: 0~0.5kg / s continuously adjustable; Air distribution branch 4: 0~0.25kg / s continuously adjustable; Air intake pressure of the test specimen: (0.1~1)MPa continuously adjustable; Air intake temperature of the test specimen: (300~673)K continuously adjustable; Temperature adjustment accuracy: ±2K; Pressure adjustment accuracy: ±1%FS; Flow rate adjustment accuracy: ±1%FS.

[0049] Exhaust system such as Figure 8 As shown, its function is to collect the gas discharged from the test specimen and discharge it to an exhaust tower. The exhaust system includes an exhaust main pipe 31 and two exhaust branch pipes installed on the exhaust main pipe. The exhaust main pipe 31 also has a cooling section 32 in the direction of airflow in the exhaust branch pipes. The end of the exhaust main pipe 31 is connected to the exhaust tower. The two exhaust branch pipes are a main gas exhaust branch pipe 33 and a cold gas exhaust branch pipe 34, respectively. The end of the main gas exhaust branch pipe 33 is connected to the main gas exhaust port of the test specimen. The main gas exhaust branch pipe is equipped with a main gas exhaust regulating valve 331. Both ends are provided with main exhaust auxiliary adjustment branches 332, and main exhaust auxiliary adjustment valves 333 are installed on the main exhaust auxiliary adjustment branches; an exhaust collector 341 is installed at the end of the cold air exhaust branch pipe 34, and multiple cold air exhaust branches 342 extending from the exhaust collector are connected to the cold air exhaust port of the test piece. The number of cold air exhaust branches 342 is equal to the number of cold air distribution branches 25 in the cold air intake system, which is four in total. Each cold air exhaust branch 342 is provided with a cold air exhaust branch adjustment valve 343, and two of the cold air exhaust branches are provided with flow meters 344.

[0050] Cooling section 32 is a high-pressure water spray cooling section, such as... Figure 10 As shown, it includes multiple atomizing nozzles 321 arranged circumferentially along the exhaust pipe 31 and an outer ring 322 that supplies water to the atomizing nozzles. The outer ring has a water inlet 323. The spray direction of the atomizing nozzles 321 is directly opposite to the airflow direction in the exhaust pipe 31. The flow rate of a single nozzle is 0.12 L / s, the nozzle working pressure is 2 MPa, the spray angle is 60 degrees, and the nozzle atomization outlet diameter is Ф1.5 mm. The cooling section uses high-pressure water spray cooling to reduce the exhaust temperature to below 300℃.

[0051] The exhaust collector 341 is used to collect the cold exhaust gas discharged from the test specimen and discharge it to the exhaust tower, and to measure the exhaust flow rate of two branches equipped with flow meters. The exhaust distributor is designed with a vertical structure, with two symmetrically arranged outlet flanges, and is made of 06Cr19Ni10 stainless steel, with a pressure resistance of 1.0MPa and a temperature resistance of 800K.

[0052] See exhaust system schematic diagram Figure 9 The main exhaust regulating valve V301 and the main exhaust auxiliary regulating valve V302 are used to regulate the main exhaust back pressure P7; the cold exhaust branch regulating valves V303 / V304 / V305 / V306 are used to regulate the cold exhaust back pressure, and can also prevent exhaust diversion when other test benches are working; the flow meters F301 and F302 on the two cold exhaust branches are used to measure the exhaust flow of branch 1 and branch 2 when conducting sealing structure tests, that is, this test platform can also study the sealing structure characteristics of the rotating disk cavity.

[0053] The main technical parameters of the exhaust system are as follows: maximum flow rate: ≥5kg / s; maximum working pressure: ≥1MPa; exhaust temperature: ≤573K.

[0054] The test specimen and power transmission system are supported by a mounting platform, such as... Figure 11 As shown, it includes a cast iron plate 51, a power transmission system mounting base 52, a test piece front bracket 53, a test piece rear bracket 54, and a sliding platform 55 for moving the power transmission system, etc. The mounting platform can meet the operability of the power transmission system shaft alignment.

[0055] Power transmission system such as Figure 11 As shown, the system includes a motor 41, a speed-increasing gearbox 42, and a torque meter 43 arranged sequentially. The motor 41 and the speed-increasing gearbox 42 are connected by a low-speed coupling 44, and the speed-increasing gearbox 42 and the test piece are connected by a high-speed coupling 45. The torque meter 43, used to measure the torque of the test piece, is directly mounted on the output flange of the speed-increasing gearbox 42 without the use of a coupling, simplifying the shaft system and avoiding situations such as excessively low critical speed or torsional vibration that could endanger the safety of the equipment and the test piece. When the power transmission system is working, the motor rotates, and after being accelerated by the speed-increasing gearbox, it drives the test piece. The speed is controlled by a frequency converter, and the torque meter measures the torque.

[0056] The lubrication system comprises two independently configured systems: a gearbox lubrication system and a test specimen lubrication system. These systems are used for lubrication and heat dissipation of the gearbox and test specimen, respectively. An emergency power supply is provided to the lubrication system, ensuring a continuous oil supply for at least five minutes after a power outage. The gearbox lubrication system consists of an oil supply pump, a return pump, an oil filter, oil supply lines, a flow meter, an oil cooler, a regulating valve, and an oil tank. The test specimen lubrication system has two oil supply branches and two return branches, providing lubrication and cooling for the front and rear bearings of the test specimen, respectively. This system also consists of an oil supply pump, a return pump, an oil filter, oil supply lines, a flow meter, an oil cooler, a regulating valve, and an oil tank. The overall lubrication system is a standard configuration.

[0057] The cooling water system includes a circulating cooling water system and a high-pressure spray water system. The circulating cooling water system is connected to the lubrication system and provides cooling water to it. The supply and return water of the circulating cooling water system are connected to the supply and return water pipes of the test plant, respectively. The cooling water flow rate can be flexibly adjusted via a remotely controlled electric regulating valve to control the oil temperature and the return water temperature. The system has the function of monitoring the pressure, flow rate, and temperature of the supply and return water. The circulating cooling water system mainly consists of a manual shut-off valve, a filter, an electric regulating valve, a flow meter, piping and fittings, and pressure and temperature sensors. The high-pressure spray water system provides cooling water to the atomizing nozzles and mainly includes a water tank, a water filter, a water supply pump unit, a flow meter, an overflow valve, a regulating valve, a pressure transmitter, a temperature sensor, a solenoid valve, piping, and a control substation. The overall cooling water system is also a standard setup.

[0058] The data acquisition system is used for the measurement and real-time acquisition of test parameters. Its main functions are to adjust and control the test bench as required, monitor the operating status of the test bench, collect and preliminarily process data, and transmit test control data to the test control system. The data acquisition system is mainly used to measure parameters such as pressure, temperature, speed, torque, flow rate, and vibration of the test platform equipment and test specimens, exchange data with the electrical control system of the test platform, and has data fusion, processing, display, and data management functions. The data acquisition system is also a standard feature.

[0059] The test specimen in this embodiment is a single-rotor test specimen. During the test, the motor drives the rotor of the test specimen through a speed-increasing gearbox, a torque meter, and a coupling. The test speed is adjusted by a frequency converter. The main airflow and secondary airflow required for the test specimen come from a common air source. After the inlet air temperature, pressure, and flow rate are adjusted, the air enters the test specimen and is then discharged into the exhaust tower after being treated by back pressure adjustment and spray cooling. The temperature and pressure signals of the test specimen are extracted through slip ring actuators. The lubrication system provides lubricating oil to the test specimen and the speed-increasing gearbox. The circulating cooling water system is used to cool the return oil from the lubrication system, and the spray cooling water system is used for exhaust cooling. The data acquisition system is used for data measurement, acquisition, processing, display, and storage.

[0060] Figure 12 To debug the structure of the test piece, the test piece consists of the test piece and a high-speed slip ring actuator. It is used to debug and verify the performance indicators and functions of the test platform. The temperature and pressure signals of the test piece are extracted through the high-speed slip ring actuator.

[0061] This test platform can introduce modeled mainstream and secondary flows under high-speed rotation conditions to conduct flow and heat transfer tests on rotating disks in engines. This allows for a thorough study of the influence of the working environment of the compressor disk and turbine disk at high speeds on the flow and heat transfer within the disks. It also investigates the impact of different engine speeds and variations in secondary flow rate, temperature, and pressure on the flow and heat transfer within the disks, providing a reliable reference for the working performance of rotating disks.

[0062] Example 2

[0063] The difference between this embodiment and Embodiment 1 is that both the intake filter and the air conditioning filter are multi-core gas filters.

[0064] Example 3

[0065] The difference between this embodiment and Embodiment 1 is that all flow meters on the test platform are Rosemount orifice plate flow meters with built-in temperature and pressure compensation, and the final output is mass flow rate.

[0066] Obviously, the above embodiments are merely examples to clearly illustrate the technical solutions of the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A gas supply system for a rotating disk cavity test platform, characterized in that, It includes a main air intake system and a cold air intake system. The main air intake system is connected to the test piece and provides the test piece with the main airflow with the required flow rate, temperature and pressure. The cold air intake system is connected to the test piece and provides the test piece with the required secondary airflow with the required flow rate, temperature and pressure. The main air intake system includes a main air intake valve, an intake filter, an expansion joint, an intake flow meter, and a heater connected in sequence through pipe sections; the pipe section between the main air intake valve and the intake filter is provided with a main air vent branch connected to the exhaust system, the pipe section between the intake filter and the expansion joint is provided with a main air branch connected to the cold air intake system, and an airflow output pipe connected to the test piece is installed on the heater. The cold air intake system includes a cold air intake valve, a cold air filter, a mixer, a cold air main expansion joint, and a cold air distributor connected in sequence through pipe sections. Multiple cold air distribution branches are connected to the cold air distributor. A cold air flow meter and a cold air heater are installed in sequence on each cold air distribution branch. A cold air output pipe connected to the test piece is installed on each cold air heater. The mixer includes a mixing cylinder and a main gas release pipeline placed inside the mixing cylinder. The main gas release pipeline includes an interconnected annular pipe section and an inlet pipe section. The inlet pipe section penetrates the wall of the mixing cylinder and is connected to the main gas branch of the main gas inlet system. Multiple through holes are densely distributed on the wall of the annular pipe section for main gas release.

2. The air supply system for the rotary disc cavity test platform according to claim 1, characterized in that, The main air intake system has a main air auxiliary regulating branch on the pipe section between the flow meter and the heater.

3. The air supply system for the rotary disc cavity test platform according to claim 1, characterized in that, The airflow output pipe is equipped with a main gas emergency venting line, which is connected to the exhaust system.

4. The air supply system for the rotating disk cavity test platform according to claim 1, characterized in that, The intake filter is a multi-core gas filter, designed for a temperature of 550℃, a pressure of 1.2MPa, and a flow rate of 2500m³ / h. 3 / h, with a filtration accuracy of 10um or higher.

5. The air supply system for the rotating disk cavity test platform according to claim 1, characterized in that, The heater is designed to reach a temperature of 560℃ and a pressure of 1.1MPa.

6. The air supply system for the rotating disk cavity test platform according to claim 1, characterized in that, The intake flow meter is a Rosemount orifice plate flow meter.

7. The air supply system for the rotary disc cavity test platform according to claim 1, characterized in that, The cold air intake system also includes an auxiliary regulating branch line for cold air mixing on the pipe section between the cold air main expansion joint and the cold air distributor.

8. The air supply system for the rotary disc cavity test platform according to claim 7, characterized in that, Venting bypasses are also provided on the pipe section between the cold air intake valve and the cold air filter in the cold air intake system, and on the pipe section between the cold air main expansion joint and the auxiliary regulating branch after cold air mixing.

9. The air supply system for the rotary disc cavity test platform according to claim 1, characterized in that, Each air outlet pipe in the air intake system is equipped with an emergency air venting branch, which is connected to the exhaust system.

Images