A high-temperature and high-pressure air supply test system

Abstract

The application discloses a high-temperature and high-pressure air supply test system and belongs to the field of rocket engine test. In the test system, the air source is connected with an electric heating system through a cold air adjusting system, the compressed air at normal temperature and specified pressure is delivered to the electric heating system, the compressed air at normal temperature is heated to a specified working temperature through linkage work of the electric heating system, a high-temperature adjusting system and electric heat tracing, the high-temperature and high-pressure gas is treated through a noise reduction system, a test system and a product to be tested are remotely controlled and test data are collected through a collection system, the system and the combined part heat transfer environment are evaluated more quickly, more economically and more reliably, and the development and verification of the engine are provided with the basis.

Description

Technical Field

[0001] This invention relates to the field of rocket engine testing technology, and in particular to a high-temperature and high-pressure air supply testing system. Background Technology

[0002] In the field of liquid rocket engines, the airflow performance tests of components are usually conducted under normal temperature conditions. However, during the flight of the engine, the thermal environment and heat transfer process inside the system and assemblies are extremely complex. Under actual high-temperature conditions, it may affect the operation of sensitive components. The verification of components is usually carried out by hot test, which has the disadvantages of long verification cycle, high cost, insufficient verification samples, and inability to fully expose the performance defects of the assemblies in advance. Summary of the Invention

[0003] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a high-temperature and high-pressure air supply test system for conducting high-temperature and high-pressure tests on liquid rocket engine systems and assemblies under ground conditions.

[0004] The technical solution of the present invention is as follows: Firstly, a high-temperature, high-pressure air supply testing system is provided, comprising:

[0005] The air conditioning system is used to reduce the pressure of the air source and generate compressed air at a specified pressure, which is then delivered to the electric heating system.

[0006] The electric heating system is used to heat the input compressed air to the required test temperature and send it to the high-temperature control system;

[0007] The high-temperature control system includes a test station for mounting the test specimen. The system comprises a main circuit, a preheating circuit, and an emergency pressure relief circuit. The main circuit leads to the test station for conducting airflow performance tests. The preheating circuit controls and regulates the preheating phase during the test. The emergency pressure relief circuit releases pressure in case of abnormalities during the test.

[0008] Electric heat tracing is used to preheat pipelines in high-temperature control systems.

[0009] Furthermore, the air conditioning system includes: an automatic gas distribution unit, a mass flow meter, an air shut-off valve, a safety valve, and a check valve; the automatic gas distribution unit reduces the pressure of the gas source to a specified pressure, and the mass flow meter, the air shut-off valve, and the check valve are installed sequentially on its output supply pipeline, and the safety valve is installed in parallel on the pipeline between the air shut-off valve and the check valve.

[0010] Furthermore, the electric heating system includes: an electric heater body and an electric heating remote control system; the electric heater body is connected and communicates with the electric heating remote control system, and the temperature of the gas is adjusted by inputting working parameters into the electric heating remote control system, and the electric heater body is remotely started and stopped.

[0011] Furthermore, the electric heater body includes a heating core, a heat insulation plate, and a temperature measuring element. The heating core heats the compressed air to a specified temperature using convection heating. The heat insulation plate is used to prevent the internal high temperature from being transferred to the outer shell of the electric heater. The temperature measuring element is used to measure the air temperature inside the electric heater body in real time.

[0012] Furthermore, it includes a high-temperature shut-off valve, high-temperature alloy pipeline, product inlet temperature and pressure measuring device, back pressure electric regulating valve assembly, preheating shut-off valve, preheating electric regulating valve, and emergency pressure relief. The high-temperature shut-off valve is connected to the output end of the electric heating system. After the high-temperature shut-off valve, the high-temperature alloy pipeline is divided into a main line, a preheating line, and an emergency pressure relief line. Among them, a back pressure electric regulating valve assembly is installed after the test station of the main line, which includes two electric regulating valves with different Cv values ​​for adjusting the flow rate and the back pressure at the outlet of the test piece during the test. The preheating line is equipped with a preheating shut-off valve and a preheating electric regulating valve. The emergency pressure relief line is equipped with an emergency pressure relief valve. The preheating line can also serve as an emergency pressure relief line, and it serves as a backup for the emergency pressure relief line.

[0013] Furthermore, the outer wall of the high-temperature alloy pipeline is insulated to prevent heat loss from the pipeline system.

[0014] Furthermore, it also includes a noise reduction system; the three high-temperature alloy pipelines after the electric regulating valve group on the main line of the high-temperature regulating system, the preheating electric regulating valve on the preheating line, and the emergency pressure relief valve on the emergency pressure relief line are merged into one line and then lead to the noise reduction system for soundproofing.

[0015] Furthermore, it also includes a data acquisition and control system for remote control of the testing system and the product under test, as well as for the acquisition of test data.

[0016] Secondly, a method for testing the airflow performance of rocket engine components is provided, utilizing the high-temperature and high-pressure air supply test system described above, including the following steps:

[0017] Install the product to be tested at the test station of the high-temperature control system;

[0018] The heating parameters of the electric heater body and the electric heat tracing are input into the electric heating remote control system and the data acquisition and control system of the electric heating system and started remotely. The gas is input with reduced pressure through the cold air conditioning system, the preheating cut-off valve is opened, and the opening of the preheating electric regulating valve is adjusted to preheat the test system.

[0019] After the gas reaches the specified temperature, the preheating shut-off valve is closed and the preheating electric regulating valve is adjusted. The gas supply pressure is gradually increased through the cold air regulating system. At the same time, the opening of the back pressure electric regulating valve group is changed to regulate the product back pressure and flow until the pressure and temperature collected by the product inlet temperature and pressure measuring device meet the test requirements.

[0020] After the test is completed, turn off the electric heating system and electric heat tracing, and open the back pressure electric regulating valve group, preheating shut-off valve, preheating electric regulating valve and emergency pressure relief valve in the high temperature regulating system; adjust the output compressed air of the cold air regulating system to continuously purge the test system until the temperature recovers.

[0021] Thirdly, the application of the high-temperature and high-pressure air supply test system described above to conduct airflow performance tests on liquid rocket engine components.

[0022] The advantages of this invention compared to the prior art are:

[0023] (1) This invention addresses the airflow performance problem of liquid rocket engine components and proposes an innovative test system. This system enables basic research on the structural strength, sealing characteristics, and heat transfer characteristics of assemblies made of different materials and with different structures to be carried out during ground testing. It allows for faster, more economical, and more reliable evaluation of the heat transfer environment of the system and assemblies, providing a basis for the development and verification of the engine.

[0024] (2) The test system of the present invention can supply high-temperature air up to 800°C. Currently, most existing high-temperature gas supply systems are high-temperature steam supply systems, while the medium supplied by this system is high-temperature air, which can reach up to 800°C.

[0025] (3) The gas supply temperature of the test system of the present invention is adjustable. By inputting the target operating parameters of the electric heater into the electric heating remote control system, high-temperature gas output at different temperatures can be achieved.

[0026] (4) The test system of the present invention has high efficiency in supplying high-temperature gas. By insulating the outer wall of the high-temperature alloy pipeline and setting electric heat tracing on the high-temperature alloy pipeline, the heat dissipation of the high-temperature gas output by the electric heating system on the pipeline can be minimized.

[0027] (5) The test system of the present invention has a high safety factor. If an abnormal problem occurs during the test, it can be depressurized with one button through the emergency pressure relief circuit, and the preheating circuit can also be used as a backup for the emergency pressure relief circuit. The two serve as backups for each other. Attached Figure Description

[0028] Figure 1 This is a system schematic diagram of the present invention;

[0029] Figure 2 This is a schematic diagram of the air conditioning system of the present invention;

[0030] Figure 3 This is a schematic diagram of the electric heating system of the present invention;

[0031] Figure 4 This is a schematic diagram of the high-temperature regulation system of the present invention. Detailed Implementation

[0032] To better understand the technical solution of the present invention, the specific embodiments of the present invention are described below.

[0033] A high-temperature and high-pressure air supply test system, such as Figure 1 As shown, the system includes: a cooling system 1, an electric heating system 2, a high-temperature control system 3, an electric heat tracing system 4, a noise reduction system 5, and a data acquisition and control system 6. After being depressurized by the cooling system 1, the compressed air at a specified pressure is delivered to the electric heating system 2. Through the coordinated operation of the electric heating system 2, the high-temperature control system 3, and the electric heat tracing system 4, the compressed air is heated to the required test temperature. The electric heat tracing system 4 preheats the test system pipelines, reducing heat loss due to heat transfer in the high-temperature gas pipelines. The noise reduction system 5 silences the discharged high-temperature, high-pressure gas. The data acquisition and control system 6 enables remote control of the test system and the product under test, as well as the acquisition of test data.

[0034] like Figure 2 As shown, the air conditioning system 1 includes an automatic gas distribution platform 11, a mass flow meter 12, an air shut-off valve 13, a safety valve 14, and a check valve 15. The mass flow meter 12, the air shut-off valve 13, and the check valve 15 are sequentially installed on the supply pipeline output from the automatic gas distribution platform 11. The safety valve 14 is connected in parallel on the pipeline between the air shut-off valve 13 and the check valve 15. The automatic gas distribution platform 11 can reduce the pressure of the high-pressure gas source to a specified working pressure. The mass flow meter 12 can monitor the gas flow rate of the test system in real time. The air shut-off valve can realize the supply and cut-off of gas entering the downstream of the test system. The safety valve 14 can prevent overpressure in the test system. The check valve 15 can prevent downstream high-temperature gas from returning to the air conditioning system 1, causing equipment damage and safety accidents.

[0035] like Figure 3 As shown, the electric heating system 2 includes an electric heater body 21 and an electric heating remote control system 22. The electric heater body 21 internally includes a heating core 211, a heat insulation plate 212, a temperature sensing element 213, and an electric heater outer shell 214. The heating core 211 heats up when energized, using convection heating to heat room temperature compressed air to a specified temperature. The heat insulation plate 212 effectively prevents the high internal temperature from being transferred to the electric heater outer shell 214. The temperature sensing element 213 can measure the internal air temperature of the electric heater in real time. An external junction box is provided on the electric heater body 21, which is connected to the electric heating remote control system 22 via a cable. After inputting operating parameters into the electric heating remote control system 22, the electric heater body 21 can be remotely started and stopped, achieving human-machine isolation.

[0036] like Figure 4As shown, the high-temperature control system 3 includes a high-temperature shut-off valve 31, a high-temperature alloy pipeline 32, a product inlet temperature and pressure measuring device 33, a back pressure electric regulating valve group 34, a preheating shut-off valve 35, a preheating electric regulating valve 36, and an emergency pressure relief valve 37. The outer wall of the high-temperature alloy pipeline 32 is insulated to effectively prevent heat dissipation from the pipeline system. The high-temperature shut-off valve 31 is used to control the supply of high-temperature gas to the downstream test station. After the high-temperature shut-off valve 31, the high-temperature alloy pipeline 32 divides into three paths. The main path leads to the test station / test piece. After the test station, a back pressure electric regulating valve group 34 is installed, containing two electric regulating valves with different Cv values, used for flow rate and test piece outlet back pressure regulation during the test. The preheating path is equipped with a preheating shut-off valve 35 and a preheating electric regulating valve 36. The emergency pressure relief path is equipped with an emergency pressure relief valve 37, which can release pressure with one button in case of abnormal problems during the test.

[0037] The three high-temperature alloy pipelines 32, after the electric regulating valve group 34 on the main line of the high-temperature regulating system 3, the preheating electric regulating valve 36 on the preheating line, and the emergency pressure relief valve 37 on the emergency pressure relief line, converge into one line and then lead to the noise reduction system 5.

[0038] The steps for conducting the test using the aforementioned test system are as follows:

[0039] 1. System preparation and product installation

[0040] First, install the product to be tested on the test station of the high-temperature control system 3, and check the valve operation status of the test system and the accuracy of the formula and zero point of the product inlet temperature and pressure measuring device 33. After the test system is prepared, perform a system airtightness check by outputting room temperature gas through the cooling system 1.

[0041] 2. System preheating

[0042] The heating parameters of the electric heater body 21 and the electric heat tracing 4 are input into the electric heating remote control system 22 and the data acquisition and control system 6 of the electric heating system 2, and then remotely started. Low-pressure gas is input through the cold air regulation system 1 to reduce pressure, the preheating cut-off valve 35 is opened, and the opening degree of the preheating electric regulating valve 36 is adjusted to carry out low-pressure preheating of the test system.

[0043] 3. Product testing

[0044] Once the product inlet temperature and pressure measuring device 33 detects that the high-temperature gas has reached the specified temperature, the preheating shut-off valve 35 is closed and the preheating electric regulating valve 36 is adjusted. The gas supply pressure is gradually increased through the cold air regulating system 1, while the opening of the back pressure electric regulating valve group 34 is changed to achieve product back pressure and flow regulation, until the pressure and temperature data collected by the product inlet temperature and pressure measuring device 33 meet the test requirements.

[0045] 4. System reheat purging

[0046] After the test is completed, turn off the electric heating system 2 and the electric heat tracing 4, and open the back pressure electric regulating valve group 34, the preheating shut-off valve 35, the preheating electric regulating valve 36 and the emergency pressure relief valve 37 in the high temperature regulating system 3; adjust the output of the cold air regulating system 1 to continuously purge the system until it returns to normal temperature.

[0047] It is understood that this invention has been described through embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific circumstances without departing from the spirit and scope of this invention. Therefore, this invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this invention.

[0048] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A high-temperature and high-pressure air supply test system, characterized in that, include: The air conditioning system (1) is used to reduce the pressure of the air source and generate compressed air at a specified pressure to be delivered to the electric heating system (2). The electric heating system (2) is used to heat the input compressed air to the required test temperature and send it to the high temperature control system (3). The high-temperature control system (3) includes a test station for installing the test piece. The system comprises a main line, a preheating line, and an emergency pressure relief line. The main line leads to the test station for conducting airflow performance tests. The preheating line controls and regulates the preheating phase during the test. The emergency pressure relief line releases pressure when abnormalities occur during the test. The high-temperature control system (3) includes a high-temperature shut-off valve (31), a high-temperature alloy pipeline (32), a product inlet temperature and pressure measuring device (33), a back pressure electric regulating valve group (34), a preheating shut-off valve (35), a preheating electric regulating valve (36), and an emergency pressure relief line. Pressure valve (37); High temperature shut-off valve (31) is connected to the output end of electric heating system (2). After high temperature shut-off valve (31), it is divided into main line, preheating line and emergency pressure relief line through high temperature alloy pipeline (32); Among them, back pressure electric regulating valve group (34) is set after the test station of the main line, which includes two electric regulating valves with different Cv values, used for flow rate and test piece outlet back pressure regulation during the test; Preheating line is equipped with preheating shut-off valve (35) and preheating electric regulating valve (36); Emergency pressure relief line is equipped with emergency pressure relief valve (37); Preheating line can also be used as emergency pressure relief line, and it is a backup for emergency pressure relief line; Electric heat tracing (4) is used to preheat the pipelines of the high-temperature regulation system.

2. The high-temperature and high-pressure air supply test system according to claim 1, characterized in that: The air conditioning system (1) includes: an automatic gas distribution station (11), a mass flow meter (12), an air shut-off valve (13), a safety valve (14), and a check valve (15); the automatic gas distribution station (11) reduces the pressure of the gas source to a specified pressure, and the mass flow meter (12), the air shut-off valve (13), and the check valve (15) are installed in sequence on its output supply pipeline, and the safety valve (14) is installed in parallel on the pipeline between the air shut-off valve (13) and the check valve (15).

3. The high-temperature and high-pressure air supply test system according to claim 1, characterized in that: The electric heating system (2) includes: an electric heater body (21) and an electric heating remote control system (22); the electric heater body (21) is connected to the electric heating remote control system (22) for communication, and the temperature of the gas is adjusted by inputting working parameters in the electric heating remote control system (22), and the electric heater body (21) is remotely started and stopped.

4. The high-temperature and high-pressure air supply test system according to claim 3, characterized in that: The electric heater body (21) contains a heating core (211), a heat insulation plate (212), and a temperature measuring element (213). The heating core (211) heats the compressed air to a specified temperature by convection heating. The heat insulation plate (212) is used to prevent the internal high temperature from being transferred to the electric heater outer shell (214). The temperature measuring element (213) is used to measure the internal air temperature of the electric heater body (21) in real time.

5. The high-temperature and high-pressure air supply test system according to claim 1, characterized in that: The outer wall of the high-temperature alloy pipeline (32) is insulated to prevent heat loss from the pipeline system.

6. The high-temperature and high-pressure air supply test system according to claim 1, characterized in that: It also includes a noise reduction system (5); the three high-temperature alloy pipelines (32) after the electric regulating valve group (34) on the main road of the high-temperature regulating system (3), the preheating electric regulating valve (36) on the preheating road and the emergency pressure relief valve (37) on the emergency pressure relief road converge into one road and then go to the noise reduction system (5) for noise reduction treatment.

7. The high-temperature and high-pressure air supply test system according to claim 6, characterized in that: It also includes a data acquisition and control system (6), which is used for remote control of the test system and the test product and for the acquisition of test data.

8. A method for testing the airflow performance of rocket engine components, characterized in that: The high-temperature and high-pressure air supply test system as described in claim 1 includes the following steps: The product to be tested is installed at the test station of the high-temperature control system (3); The heating parameters of the electric heater body (21) and the electric heat tracing (4) are input into the electric heating remote control system (22) and the data acquisition and control system (6) of the electric heating system (2) respectively and started remotely. The gas is reduced and input through the cold air conditioning system (1), the preheating cut-off valve (35) is opened, and the opening degree of the preheating electric regulating valve (36) is adjusted to carry out preheating. After the gas reaches the specified temperature, the preheating shut-off valve (35) is closed and the preheating electric regulating valve (36) is adjusted. The gas supply pressure is gradually increased through the cold air regulating system (1), and the opening of the back pressure electric regulating valve group (34) is changed to realize the product back pressure and flow rate regulation until the pressure and temperature collected by the product inlet temperature and pressure measuring device (33) meet the test requirements. After the test is completed, turn off the electric heating system (2) and the electric heat tracing (4), and open the back pressure electric regulating valve group (34), the preheating shut-off valve (35), the preheating electric regulating valve (36) and the emergency pressure relief valve (37) in the high temperature regulating system (3); adjust the output compressed air of the cold air regulating system (1) to continuously purge the test system until the temperature recovers.

9. The application of the high-temperature and high-pressure air supply test system according to any one of claims 1 to 7 for testing the airflow performance of liquid rocket engine components.

Images