High-temperature and high-pressure air supply test system

Abstract

The invention discloses a high-temperature and high-pressure air supply test system, and belongs to the field of rocket engine tests. In the test system, after an air source is subjected to pressure reduction through a cold air adjusting system, normal-temperature compressed air with specified pressure is conveyed to an electric heating system, and the normal-temperature compressed air is heated to a specified working temperature through linkage work of the electric heating system, a high-temperature adjusting system and an electric heat tracing system. The noise reduction system is used for silencing exhausted high-temperature and high-pressure gas, and the acquisition launch control system is used for remotely controlling the test system and the product to be tested and acquiring test data. The heat transfer environment of the system and the assembly can be evaluated more quickly, more economically and more reliably, and a basis is provided for development and verification of an engine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rocket engine test, in particular to a high-temperature and high-pressure air supply test system. BACKGROUND

[0002] In the field of liquid rocket engine, the airflow performance test of components is usually carried out under normal temperature condition, but the heat environment and heat transfer process inside the system and assembly during flight are extremely complex, which may affect the operation of sensitive components under actual high-temperature environment, and the verification of components is usually carried out by hot test, which has the problems of long verification period, high cost, insufficient verification samples, and cannot completely expose the performance defects of assembly in advance. SUMMARY

[0003] The technical problem solved by the present application is to overcome the shortcomings of the prior art, and provide a high-temperature and high-pressure air supply test system for carrying out high-temperature and high-pressure test of liquid rocket engine system and assembly under ground state.

[0004] The technical solution of the present application is: in the first aspect, a high-temperature and high-pressure air supply test system is provided, comprising:

[0005] A cold gas regulation system is used to reduce the pressure of the gas source and generate compressed air of a specified pressure to be delivered to the electric heating system;

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

[0007] A high-temperature regulation system is provided with a test station for installing the test piece; the high-temperature regulation system includes a main path, a preheating path and an emergency relief path; the main path leads to the test station for carrying out airflow performance test; the preheating path is used for control and regulation during the preheating stage of the test process; the emergency relief path is used for pressure relief when abnormality occurs during the test process;

[0008] An electric heat tracing is used to preheat the pipeline of the high-temperature regulation system.

[0009] Further, the cold gas regulation system comprises an automatic gas distribution table, a mass flow meter, a cold gas shut-off valve, a safety valve and a check valve; the automatic gas distribution table reduces the pressure of the gas source to a specified pressure, and the output supply pipeline is sequentially provided with the mass flow meter, the cold gas shut-off valve and the check valve, and the safety valve is connected in parallel to the pipeline between the cold gas shut-off valve and the check valve.

[0010] Further, the electric heating system comprises an electric heater body and an electric heating remote control system; the electric heater body is connected to the electric heating remote control system for communication, and the working parameters are input in the electric heating remote control system to control the temperature of the heated gas and remotely start and stop the electric heater body.

[0011] Further, the electric heater body contains a heating core, a heat insulation plate and a temperature measuring element inside. The heating core uses convection heating to heat compressed air to a specified temperature; the heat insulation plate is used to prevent internal high temperature from being transmitted to the electric heater shell; and the temperature measuring element is used to measure the air temperature inside the electric heater body in real time.

[0012] Further, it comprises a high-temperature cut-off valve, a high-temperature alloy pipeline, a product inlet temperature and pressure measuring device, a back pressure electric regulating valve group, a preheating cut-off valve, a preheating electric regulating valve and an emergency pressure relief. The high-temperature cut-off valve is connected to the output end of the electric heating system, and the high-temperature cut-off valve is divided into a main road, a preheating road and an emergency pressure relief road through a high-temperature alloy pipeline. The back pressure electric regulating valve group is arranged behind the test station of the main road and comprises two electric regulating valves with different Cv values, which are used for adjusting the flow and the outlet back pressure of the test piece during the test. The preheating cut-off valve and the preheating electric regulating valve are matched with the preheating road. The emergency pressure relief valve is matched with the emergency pressure relief road. The preheating road can also serve as the emergency pressure relief road and back up the emergency pressure relief road.

[0013] Further, the outer wall of the high-temperature alloy pipeline is covered with insulation to prevent heat dissipation of the pipeline system.

[0014] Further, it also comprises a noise reduction system. After the three high-temperature alloy pipelines on the electric regulating valve group of the high-temperature regulating system main road, the preheating electric regulating valve of the preheating road and the emergency pressure relief valve of the emergency pressure relief road are merged into one pipeline, they lead to the noise reduction system for sound reduction.

[0015] Further, it also comprises a collection and control system for remote control of the test system and the product to be tested and collection of test data.

[0016] In the second aspect, a high-temperature and high-pressure air supply test system is provided for testing the gas flow performance of a rocket engine component, which comprises the following steps:

[0017] The product to be tested is installed in the test station of the high-temperature regulating system;

[0018] The heating parameters of the electric heater body and the electric heat tracing are inputted into the electric heating remote control system and the collection and control system of the electric heating system respectively, and the electric heating is started remotely. The pressure of the input gas is reduced through the cold gas regulating system, the preheating cut-off valve is opened, the opening degree of the preheating electric regulating valve is adjusted, and the test system is preheated.

[0019] After the gas reaches the specified temperature, the preheating cut-off valve and the preheating electric regulating valve are closed, the pressure of the gas supply is gradually increased through the cold gas regulating system, and the opening degree of the back pressure electric regulating valve group is changed to realize the regulation of 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, the electric heating system and the electric heat tracing are closed, the back pressure electric regulating valve group, the preheating cut-off valve, the preheating electric regulating valve and the emergency pressure relief valve in the high-temperature regulating system are opened, and the compressed air in the cold air regulating system is continuously blown to the test system until the temperature is recovered.

[0021] In a third aspect, the application of the high-temperature and high-pressure air supply test system to the airflow performance test of liquid rocket engine components is provided.

[0022] Compared with the prior art, the application has the following advantages:

[0023] (1) The application provides a test system for the airflow performance of liquid rocket engine components, which can be used to carry out basic researches on the structural strength, sealing characteristics and heat transfer characteristics of combined components of different materials and structures, and to evaluate the heat transfer environment of the system and the combined components more quickly, more economically and more reliably, thereby providing a basis for the development and verification of the engine.

[0024] (2) The test system of the application can supply high-temperature air up to 800 DEG C. The existing high-temperature gas supply system is mostly a high-temperature steam supply system, and the medium supplied by the system is high-temperature air, which can be up to 800 DEG C.

[0025] (3) The test system of the application can supply air at different temperatures. By inputting the target working parameters of the electric heater in the electric heating remote control system, high-temperature air at different temperatures can be output.

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

[0027] (5) The test system of the application has high safety factor. In case of abnormal problems during the test, the emergency pressure relief path can be one-key relieved, and the preheating path can also be used as a backup of the emergency pressure relief path, which are mutually backed up. DETAILED DESCRIPTION

[0028] Figure 1 is the system principle diagram of the application;

[0029] Figure 2 is the cold air regulating system principle diagram of the application;

[0030] Figure 3 is the electric heating system principle diagram of the application;

[0031] Figure 4 is the high-temperature regulating system principle diagram of the application. DETAILED DESCRIPTION

[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 regulating system 3 includes a high-temperature cut-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 cut-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 covered with insulation, which can effectively prevent heat dissipation of the pipeline system. The high-temperature cut-off valve 31 is used to realize the on-off of the supply of high-temperature gas to the downstream test station. The high-temperature cut-off valve 31 is divided into three paths through the high-temperature alloy pipeline 32, wherein the main path leads to the test station / test piece. The back pressure electric regulating valve group 34 is arranged behind the test station and includes two electric regulating valves with different Cv values, which are used to adjust the flow and the outlet back pressure of the test piece during the test. The preheating path is matched with a preheating cut-off valve 35 and a preheating electric regulating valve 36. The emergency pressure relief path is matched with an emergency pressure relief valve 37. In case of abnormal problems during the test, the emergency pressure relief valve 37 can be used for one-key pressure relief.

[0037] The three high-temperature alloy pipelines 32 behind the electric regulating valve group 34 on the main path of the high-temperature regulating system 3, the preheating electric regulating valve 36 on the preheating path, and the emergency pressure relief valve 37 on the emergency pressure relief path are merged into one path, which leads to the noise reduction system 5.

[0038] The steps of performing the test by using the test system are as follows:

[0039] 1. System preparation and product installation

[0040] Firstly, the product to be tested is installed on the test station of the high-temperature regulating system 3, and the valve action state of the test system and whether the formula and zero point of the product inlet temperature and pressure measuring device 33 are accurate are checked. After the test system is prepared, the cold gas regulating system 1 outputs normal temperature gas to perform a system airtightness check.

[0041] 2. System preheating

[0042] The heating parameters of the electric heater body 21 and the electric tracing 4 are inputted in the electric heating remote control system 22 and the acquisition and control system 6 of the electric heating system 2 respectively, and are remotely started. Low-pressure gas is inputted through the cold gas regulating system 1, the preheating cut-off valve 35 is opened, the opening of the preheating electric regulating valve 36 is adjusted, and the test system is preheated at low pressure.

[0043] 3. Product test

[0044] After the product inlet temperature and pressure measuring device 33 collects the high-temperature gas reaching the specified temperature, the preheating cut-off valve 35 is closed, the preheating electric regulating valve 36 is adjusted, the gas supply pressure is gradually increased through the cold gas 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 adjustment, until the pressure and temperature data collected by the product inlet temperature and pressure measuring device 33 meet the test requirements.

[0045] 4. System temperature recovery and purging

[0046] After the test is completed, the electric heating system 2 and the electric heat tracing 4 are closed, and the back pressure electric regulating valve group 34, the preheating cut-off valve 35, the preheating electric regulating valve 36 and the emergency pressure relief valve 37 in the high-temperature regulating system 3 are opened; the output of the cold air regulating system 1 is adjusted to output the compressed air at normal temperature to continuously purge the system test until the system test is recovered to the normal temperature.

[0047] It can be understood that the present application is described by way of examples, and those skilled in the art can make various changes or equivalent replacements to the features and examples without departing from the spirit and scope of the present application. In addition, the features and examples can be modified to adapt to specific conditions without departing from the spirit and scope of the present application under the teaching of the present application. Therefore, the present application is not limited to the specific examples disclosed herein, and the examples falling within the scope of the claims of the present application are within the scope of protection of the present application.

[0048] The contents not described in detail in the specification of the present application are the known technology of those skilled in the art.

Claims

1. A high temperature high pressure air supply test system, characterized by, It comprises: A cold air conditioning system (1) for reducing the pressure of the air source to generate compressed air of a specified pressure to be delivered to an electric heating system (2); The electric heating system (2) is used for heating the input compressed air to the required temperature for the test and sent to the high-temperature conditioning system (3); The high-temperature conditioning system (3) is provided with a test station for installing the test piece; the high-temperature conditioning system comprises a main path, a preheating path and an emergency pressure relief path; wherein the main path leads to the test station for carrying out the airflow performance test; the preheating path is used for control and adjustment during the preheating stage of the test; the emergency pressure relief path is used for pressure relief when abnormality occurs during the test; The electric heat tracing (4) is used for preheating the pipeline of the high-temperature conditioning system.

2. The high temperature, high pressure air supply test system of claim 1, wherein: The cold air conditioning system (1) comprises an automatic air distribution platform (11), a mass flowmeter (12), a cold air shut-off valve (13), a safety valve (14) and a check valve (15); the automatic air distribution platform (11) reduces the pressure of the air source to a specified pressure, and the output supply pipeline is sequentially provided with the mass flowmeter (12), the cold air shut-off valve (13) and the check valve (15), and the safety valve (14) is connected in parallel on the pipeline between the cold air shut-off valve (13) and the check valve (15).

3. The high temperature, high pressure air supply test system of claim 1, wherein: The electric heating system (2) comprises an electric heater body (21) and an electric heating remote control system (22); the electric heater body (21) is connected and communicated with the electric heating remote control system (22), the temperature of the gas heating is adjusted by inputting the 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, high pressure air supply test system of claim 3, wherein: The electric heater body (21) comprises a heating core (211), an insulation plate (212) and a temperature measuring element (213); the heating core (211) adopts a convection heating mode to heat the compressed air to a specified temperature; the insulation plate (212) is used for preventing the internal high temperature from being transferred to the electric heater shell (214), and the temperature measuring element (213) is used for measuring the internal air temperature of the electric heater body (21) in real time.

5. The high temperature, high pressure air supply test system of claim 1, wherein: The high-temperature conditioning system (3) comprises 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 high-temperature shut-off valve (31) is connected with the output end of the electric heating system (2), the high-temperature shut-off valve (31) is divided into a main path, a preheating path and an emergency pressure relief path through the high-temperature alloy pipeline (32) after the high-temperature shut-off valve (31); wherein the test station of the main path is provided with the back pressure electric regulating valve group (34) containing two electric regulating valves with different Cv values, which is used for adjusting the flow and the outlet back pressure of the test piece during the test; the preheating path is matched with the preheating shut-off valve (35) and the preheating electric regulating valve (36); the emergency pressure relief path is matched with the emergency pressure relief valve (37); the preheating path can also serve as the emergency pressure relief path, and the emergency pressure relief path and the preheating path are backup for each other.

6. The high temperature, high pressure air supply test system of claim 1, wherein: The outer wall of the high-temperature alloy pipeline (32) is covered with insulation to avoid heat dissipation of the pipeline system.

7. The high temperature, high pressure air supply test system of claim 1, wherein: The noise reduction system (5) is also included; three high-temperature alloy pipelines (32) after the electric regulating valve group (34) on the main path of the high-temperature regulating system (3), the preheating electric regulating valve (36) on the preheating path and the emergency pressure relief valve (37) on the emergency pressure relief path are merged into one path, and then go to the noise reduction system (5) for noise reduction.

8. The high temperature, high pressure air supply test system of claim 7, wherein: The acquisition and control system (6) is also included for remote control of the test system and the product to be tested and acquisition of test data.

9. A method of testing the performance of a flow of a rocket engine subassembly, characterized by: The high-temperature and high-pressure air supply test system according to claim 1 comprises the following steps: The product to be tested is installed in the test station of the high-temperature regulating system (3); The heating parameters of the electric heater body (21) and the electric tracing (4) are inputted in the electric heating remote control system (22) of the electric heating system (2) and the acquisition and control system (6) respectively and are remotely started, the gas is inputted by the pressure reduction of the cold gas regulating system (1), the preheating cut-off valve (35) is opened, the opening of the preheating electric regulating valve (36) is adjusted, and preheating is performed; After the gas reaches the specified temperature collected by the product inlet temperature and pressure measuring device (33), the preheating cut-off valve (35) and the preheating electric regulating valve (36) are closed, the gas supply pressure is gradually increased by the cold gas regulating system (1), the opening of the back pressure electric regulating valve group (34) is changed to realize the product back pressure and flow regulation, and the pressure and temperature collected by the product inlet temperature and pressure measuring device (33) reach the test requirements; After the test is completed, the electric heating system (2) and the electric tracing (4) are closed, the back pressure electric regulating valve group (34), the preheating cut-off valve (35), the preheating electric regulating valve (36) and the emergency pressure relief valve (37) in the high-temperature regulating system (3) are opened, and the output compressed air of the cold gas regulating system (1) is continuously purged to restore the temperature of the test system.

10. The application of the high-temperature and high-pressure air supply test system according to any one of claims 1-8 to the airflow performance test of liquid rocket engine components.

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