A test device for shell high temperature explosion and composite loading

Abstract

The present invention belongs to the field of high-temperature explosion composite loading test of rocket engine casing, and discloses a test device for high-temperature explosion composite loading of casing, including a high-temperature pressure explosion test system and a high-temperature test box, and the operation and data recording of the entire test process are controlled and realized by a computer control system. The present invention can realize a composite loading environment in which the engine casing is exposed to a temperature of up to 200°C or even higher and an internal pressure of up to 50Mpa or even higher by designing and building a test device for high-temperature explosion composite loading, solves the three problems currently faced in this field, namely, the composite loading realization device, the uniformity of the high-temperature environment of the casing, and the safety protection under the high-temperature explosion composite environment. At the same time, the computer control system is used to control the operation and data recording of the entire test process, and an explosion-proof box is designed and installed in the high-temperature test box, and the test piece is placed inside the explosion-proof box for testing, which can ensure the accuracy and safety of high-temperature explosion loading.

Description

Technical Field

[0001] The invention relates to the field of high temperature explosion composite loading test of rocket engine casing, and in particular to a casing high temperature explosion composite loading test device. Background Art

[0002] The shell is a common structure of rocket engines. During operation, it will be subjected to complex mechanical and thermal environments such as high temperature and high pressure. High-temperature burst test is a method to assess the strength and reliability of rocket engine shells in mechanical and thermal environments. It is used to determine the reliability of the engine shell's functions and the integrity of its structure in a high-temperature internal pressure composite environment. Standard pressure burst testers can generally perform pressure burst tests on standard pipelines and pipes to achieve the assessment of the product in the working environment, thereby verifying the mechanical properties of the structure. However, with the increasing requirements for engine thrust and speed, the requirements for engine shell assessment are becoming more and more stringent. The engine shell is exposed to temperatures as high as 200°C or even higher, and the internal pressure is as high as 50Mpa or even higher. Standard pressure burst equipment cannot meet the assessment of the structure in this special environment. That is, the existing pressure burst equipment cannot solve the three problems of composite loading implementation device, uniformity of the shell high temperature environment, and safety protection in the high-temperature burst composite environment during composite loading. Summary of the invention

[0003] According to the above technical problems, the present invention provides a test device for high-temperature explosion and composite loading of a shell, comprising a high-temperature pressure explosion test system and a high-temperature test box, wherein an explosion-proof box is arranged inside the high-temperature test box, a supporting tooling is installed at the bottom of the explosion-proof box, a test piece is fixedly installed on the supporting tooling, a test piece oil inlet pipeline and a test piece oil return pipeline are respectively arranged at the bottom and the top of the test piece, circular holes are respectively arranged on the side walls of the explosion-proof box and the high-temperature test box, the test piece oil inlet pipeline and the test piece oil return pipeline pass through the circular holes on the side walls of the explosion-proof box and the high-temperature test box from inside to outside in turn and extend to the outside of the high-temperature test box, and the ends of the test piece oil inlet pipeline and the test piece oil return pipeline located outside the high-temperature test box constitute an oil inlet and an oil return port respectively;

[0004] The high-temperature pressure burst test system comprises a high-temperature heating oil tank, an integrated digital temperature sensor I, a filter I, an electric high-temperature oil filling pump, an air-controlled valve, and a one-way valve. The high-temperature heating oil tank is filled with liquid oil. The high-temperature heating oil tank is provided with an integrated digital temperature sensor I. A high-temperature heating oil tank oil inlet pipeline is led from the high-temperature heating oil tank to the test piece. A filter I, an electric high-temperature oil filling pump, an air-controlled valve I, and a one-way valve are sequentially provided on the high-temperature heating oil tank oil inlet pipeline. The end of the high-temperature heating oil tank oil inlet pipeline is connected to the oil inlet.

[0005] A branch extends from the oil inlet pipeline of the high-temperature heating oil tank, and the branch is connected with the oil inlet pipeline of the high-temperature heating oil tank. A high-temperature and high-pressure pump is installed on the branch, and the high-temperature and high-pressure pump is connected with the air compressor and the high-temperature heating oil tank respectively. A filter II is installed on the branch between the high-temperature and high-pressure pump and the high-temperature heating oil tank, and an air control valve II is provided at the position before the branch is connected with the oil inlet pipeline of the high-temperature heating oil tank; an integrated digital display pressure sensor and an integrated digital display temperature sensor II are respectively provided at the oil return port, and the oil return port is connected with one end of the oil return pipeline of the high-temperature heating oil tank, and an exhaust valve and a window are sequentially provided on the oil return pipeline of the high-temperature heating oil tank, and the other end of the oil return pipeline of the high-temperature heating oil tank extends into the liquid oil of the high-temperature heating oil tank;

[0006] The operation and data recording of the entire test process are controlled by a computer control system.

[0007] Furthermore, the liquid oil is silicone oil.

[0008] Furthermore, a reinforcing plate is provided on the top of the explosion-proof box, and square holes are symmetrically provided on both sides of the reinforcing plate.

[0009] Furthermore, an ultra-high pressure filter and a high-frequency pressure sensor are also provided at the oil inlet.

[0010] Furthermore, the circular hole is sealed by a silicone foam plug.

[0011] The beneficial effects of the present invention are as follows: the present invention can achieve a composite loading environment in which the engine casing is exposed to a temperature of up to 200°C or even higher and an internal pressure of up to 50Mpa or even higher by designing and constructing a test device for high-temperature blasting composite loading, thereby solving the three difficult problems currently faced in the art, namely, the composite loading implementation device, the uniformity of the high-temperature environment of the casing, and the safety protection in the high-temperature blasting composite environment. At the same time, a computer control system is used to control the operation and data recording of the entire test process, an explosion-proof box is designed and installed in the high-temperature test box, and the test piece is placed inside the explosion-proof box for testing, thereby ensuring the accuracy and safety of the high-temperature blasting loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the main structure diagram of the present invention;

[0013] Figure 2 This is a schematic diagram of the main structure of the explosion-proof box.

[0014] As shown in the figure, 1. High-temperature heating oil tank; 2. Integrated digital display temperature sensor I; 3. Filter I; 4. Electric high-temperature oil filling pump; 5. Air control valve I; 6. Check valve; 7. Test piece; 8. Support tooling; 9. Explosion-proof box; Reinforcement plate-901, square hole-902, round hole-903, 10. High-temperature test box; 11. Integrated digital display pressure sensor; 12. Integrated digital display temperature sensor II; 13. Exhaust valve; 14. Window; 15. Air compressor; 16. Filter II; 17. High-temperature and high-pressure pump; 18. Air control valve II; 19. Ultra-high pressure filter; 20. High-frequency pressure sensor; 21. Computer automatic control system;

[0015] 100, test piece oil inlet pipeline; 200, test piece oil return pipeline; 300, oil inlet port; 400, oil return port; 500, high-temperature heating oil tank oil inlet pipeline; 600, high-temperature heating oil tank oil return pipeline; 700, branch line. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings: The present invention is a test device for high-temperature explosion and composite loading of a shell, comprising a high-temperature pressure explosion test system and a high-temperature test box 10, wherein the high-temperature test box 10 is used to provide a high-temperature environment outside the test piece 7, and an explosion-proof box 9 is arranged inside the high-temperature test box 10, and the explosion-proof box 9 is mainly used for the safety protection of the test piece 7 during high-temperature pressure explosion, and a supporting tool 8 is installed at the bottom of the explosion-proof box 9, and the test piece 7 is fixedly installed on the supporting tool 8, and the supporting tool 8 is used to support the test piece 7 stably during the liquid filling and pressurization process. The test piece 7 is fixed, and a test piece oil inlet pipeline 100 and a test piece oil return pipeline 200 are respectively provided at the bottom and the top, and circular holes 903 are respectively provided on the side walls of the explosion-proof box 9 and the high-temperature test box 10. The test piece oil inlet pipeline 100 and the test piece oil return pipeline 200 pass through the circular holes 903 on the side walls of the explosion-proof box 9 and the high-temperature test box 10 from the inside to the outside and extend to the outside of the high-temperature test box 10. The ends of the test piece oil inlet pipeline 100 and the test piece oil return pipeline 200 located outside the high-temperature test box 10 respectively constitute an oil inlet port 300 and an oil return port 400;

[0017] The high temperature pressure burst test system comprises a high temperature heating oil tank 1, an integrated digital temperature sensor 12, a filter 13, an electric high temperature oil filling pump 4, an air control valve 15, and a one-way valve 6. The high temperature heating oil tank 1 is filled with liquid oil, and the high temperature heating oil tank 1 is used to heat the liquid oil. The high temperature heating oil tank 1 is provided with an integrated digital temperature sensor 12, and the integrated digital temperature sensor 12 is used to display the oil temperature in the high temperature heating oil tank 1. A high temperature heating oil tank inlet pipeline 500 is led from the high temperature heating oil tank 1 to the test piece 7. The high temperature heating oil tank inlet pipeline 500 A filter I3, an electric high-temperature oil filling pump 4, an air-controlled valve I5, and a one-way valve 6 are sequentially arranged on the test piece 7, wherein the filter I3 is used to filter impurities in the high-temperature liquid oil coming out of the high-temperature heating oil tank 1, the electric high-temperature oil filling pump 4 is used to fill the high-temperature liquid oil into the test piece 7, and the one-way valve 6 plays a role in that the high-temperature liquid oil can only enter the test piece 7 in one direction, and the air-controlled valve I5 controls the opening and closing of the high-temperature heating oil tank oil inlet pipeline 500, and at the same time can prevent the liquid in the test piece 7 from flowing back after the one-way valve 6 fails, and the end of the high-temperature heating oil tank oil inlet pipeline 500 is connected to the oil inlet 300;

[0018] A branch 700 extends from the high-temperature heating oil tank inlet pipeline 500, and the branch 700 is connected to the high-temperature heating oil tank inlet pipeline 500. A high-temperature and high-pressure pump 17 is installed on the branch 700, and the high-temperature and high-pressure pump 17 is connected to the air compressor 15 and the high-temperature heating oil tank 1 respectively. The air compressor 15 is used to provide pressurized gas to the high-temperature and high-pressure pump 17. The high-temperature and high-pressure pump 17 pressurizes the gas provided by the air compressor 15, and fills the test piece 7 with liquid during the pressurization process. A filter II16 is installed on the branch 700 between the high-temperature and high-pressure pump 17 and the high-temperature heating oil tank 1. An air control valve II18 is provided at the position before the branch 700 is connected to the high-temperature heating oil tank inlet pipeline 500, and the air control valve II18 controls the opening and closing of the branch 700;

[0019] The oil return port 400 is provided with an integrated digital display pressure sensor 11 and an integrated digital display temperature sensor II12, respectively, for monitoring the pressure and temperature at the oil return port 400. The oil return port 400 is connected to one end of a high-temperature heating oil tank return oil pipeline 600. The high-temperature heating oil tank return oil pipeline 600 is provided with an exhaust valve 13 and a window 14 in sequence. The exhaust valve 13 is used to discharge the gas in the test piece 7 and control the opening and closing of the test piece return oil pipeline 200. The window 14 is used to observe whether the test piece 7 is full of liquid for reflux. The other end of the high-temperature heating oil tank return oil pipeline 600 extends into the liquid oil of the high-temperature heating oil tank 1.

[0020] The operation and data recording of the entire test process are controlled and implemented by the computer control system 21.

[0021] Furthermore, the liquid oil is silicone oil.

[0022] Furthermore, a reinforcing plate 901 is provided on the top of the explosion-proof box 9 , and square holes 902 are symmetrically provided on both sides of the reinforcing plate 901 .

[0023] Furthermore, an ultra-high pressure filter 19 and a high-frequency pressure sensor 20 are provided at the oil inlet 300. The ultra-high pressure filter 19 filters the liquid and gas entering the test piece 7 before pressurization, and the high-frequency pressure sensor 20 is used to record the pressure value during the continuous dynamic pressurization process.

[0024] Furthermore, the circular hole 903 is sealed by a silicone foam plug to prevent heat loss.

[0025] Working principle: When the system is in working state, the test piece 7 is placed on the supporting fixture 8 and connected with the oil line interface, and is placed in the explosion-proof box 9 together with the supporting fixture 8, wherein the circular hole 903 opened through the side wall of the explosion-proof box 9 and the high-temperature test box 10 is used to connect the test piece oil inlet pipeline 100 and the test piece oil return pipeline 200. After the pipeline connection is completed, the circular hole 903 on the side wall of the high-temperature test box 10 is blocked with a silicone foam plug to prevent heat dissipation; the circular holes 903 on the side walls of the explosion-proof box 9 at both ends cooperate with the square holes 902 on the top to ensure that the heat of the high-temperature test box 10 can be evenly delivered to the surface of the test piece 7, and the high-temperature explosion-proof box 9 is used to connect the test piece 7 to the oil return pipeline 200. During the burst test, the maximum impact force on the explosion-proof box 9 mainly comes from the impact of the upper joint of the test piece 7 on the box in the vertical direction. Therefore, the use of a reinforcing plate 901 on the top of the explosion-proof box 9 can ensure the strength of the explosion-proof box 9; the high-temperature heating oil tank 1 heats the silicone oil to 200°C, and the electric high-temperature oil filling pump 4 fills the high-temperature silicone oil into the test piece 7. As the high-temperature silicone oil fills the test piece 7, the gas inside the test piece 7 is discharged, and the entire oil circuit system begins to circulate. The high-temperature test box 10 is turned on and quickly raised to 200°C. When the oil temperature of the test piece's oil return port 200 reaches 200°C, the exhaust valve 13 is closed, and the electric high-temperature oil filling pump 4 is turned off. The high-temperature and high-pressure pump 17 starts to work, and the test piece 7 is pressure-loaded at the loading rate required by the test until the test piece 7 explodes, and the high-temperature explosion pressure value is recorded.

[0026] The above description is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A test method based on a test device for shell high temperature explosion and composite loading, the test device comprising a high temperature pressure explosion test system and a high temperature test chamber, wherein: An explosion-proof box is provided in the high-temperature test box, a supporting tool is installed at the bottom of the explosion-proof box, a test piece is fixedly installed on the supporting tool, a test piece oil inlet pipeline and a test piece oil return pipeline are respectively provided at the bottom and the top of the test piece, circular holes are respectively provided on the side walls of the explosion-proof box and the high-temperature test box, the test piece oil inlet pipeline and the test piece oil return pipeline pass through the circular holes on the side walls of the explosion-proof box and the high-temperature test box from inside to outside in sequence and extend to the outside of the high-temperature test box, and the ends of the test piece oil inlet pipeline and the test piece oil return pipeline located outside the high-temperature test box constitute an oil inlet port and an oil return port respectively; The high-temperature pressure burst test system comprises a high-temperature heating oil tank, an integrated digital temperature sensor I, a filter I, an electric high-temperature oil filling pump, an air-controlled valve, and a one-way valve. The high-temperature heating oil tank is filled with liquid oil. The high-temperature heating oil tank is provided with an integrated digital temperature sensor I. A high-temperature heating oil tank oil inlet pipeline is led from the high-temperature heating oil tank to the test piece. A filter I, an electric high-temperature oil filling pump, an air-controlled valve I, and a one-way valve are sequentially provided on the high-temperature heating oil tank oil inlet pipeline. The end of the high-temperature heating oil tank oil inlet pipeline is connected to the oil inlet. A branch extends from the oil inlet pipeline of the high-temperature heating oil tank, and the branch is connected with the oil inlet pipeline of the high-temperature heating oil tank. A high-temperature and high-pressure pump is installed on the branch, and the high-temperature and high-pressure pump is connected with the air compressor and the high-temperature heating oil tank respectively. A filter II is installed on the branch between the high-temperature and high-pressure pump and the high-temperature heating oil tank, and an air control valve II is provided at the position before the branch is connected with the oil inlet pipeline of the high-temperature heating oil tank; an integrated digital display pressure sensor and an integrated digital display temperature sensor II are respectively provided at the oil return port, and the oil return port is connected with one end of the oil return pipeline of the high-temperature heating oil tank, and an exhaust valve and a window are sequentially provided on the oil return pipeline of the high-temperature heating oil tank, and the other end of the oil return pipeline of the high-temperature heating oil tank extends into the liquid oil of the high-temperature heating oil tank; The operation and data recording of the entire test process are controlled by a computer control system; It is characterized in that, when the system is in working state, the test piece is placed on the supporting fixture and connected with the oil circuit interface, and is placed in the explosion-proof box together with the supporting fixture, wherein the circular holes opened through the side walls of the explosion-proof box and the high-temperature test box are used to connect the oil inlet pipeline of the test piece and the oil return pipeline of the test piece. After the pipeline connection is completed, the circular holes of the side walls of the high-temperature test box are blocked with silicone foam plugs to prevent heat dissipation; the circular holes on the side walls of the explosion-proof box at both ends cooperate with the square holes on the top to ensure that the heat of the high-temperature test box can be evenly delivered to the surface of the test piece. During the high-temperature explosion test, the maximum impact force received by the explosion-proof box mainly comes from the upper end joint of the test piece. The box body is impacted in the vertical direction, so a reinforcing plate is used on the top of the explosion-proof box to ensure the strength of the explosion-proof box; the high-temperature heating oil tank heats the silicone oil to 200°C, and the electric high-temperature oil filling pump fills the high-temperature silicone oil into the test piece. As the high-temperature silicone oil fills the test piece, the gas inside the test piece is discharged, and the entire oil circuit system begins to circulate. The high-temperature test box is turned on and quickly raised to 200°C. When the oil temperature at the oil return port of the test piece reaches 200°C, the exhaust valve is closed, the electric high-temperature oil filling pump is turned off, and the high-temperature and high-pressure pump starts working. The test piece is pressure-loaded at the loading rate required by the test until the test piece explodes, and the high-temperature explosion pressure value is recorded.

2. The test method of the test device based on shell high temperature explosion and composite loading according to claim 1 is characterized in that: The liquid oil is silicone oil.

3. The test method of the test device based on shell high temperature explosion and composite loading according to claim 1 is characterized in that: A reinforcing plate is also provided on the top of the explosion-proof box, and square holes are symmetrically provided on both sides of the reinforcing plate.

4. The test method of the test device based on shell high temperature explosion and composite loading according to claim 1 is characterized in that: An ultra-high pressure filter and a high-frequency pressure sensor are also provided at the oil inlet.

Images