CN110985242A - Reliability inspection device for ablation-resistant material - Google Patents
Reliability inspection device for ablation-resistant material Download PDFInfo
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- CN110985242A CN110985242A CN201911230199.6A CN201911230199A CN110985242A CN 110985242 A CN110985242 A CN 110985242A CN 201911230199 A CN201911230199 A CN 201911230199A CN 110985242 A CN110985242 A CN 110985242A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/96—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof characterised by specially adapted arrangements for testing or measuring
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Abstract
The invention discloses a reliability testing device for an ablation-resistant material, which relates to the technical field of reliability testing and mainly carries out ablation impact testing on the ablation-resistant heat-insulating material in a short time and under variable load. This reliability detection device result is simple, can carry out ablation impact detection to being tested in the short time to all scribble the insulating layer in the device, guaranteed this reliability detection device's life greatly, in addition, the propellant kind and the size that the combustion chamber adopted are different, can simulate the ablation impact detection of different working pressure, time, can detect more comprehensively being tested of being tested, improved the efficiency that resistant ablation material reliability detected greatly.
Description
Technical Field
The invention belongs to the technical field of reliability detection, and particularly relates to a reliability detection device for an ablation-resistant material.
Background
Patent CN110044947A discloses a reliability detection device for ablation-resistant heat-insulating material, which comprises a mounting seat, a rotating wheel mechanism, a to-be-tested piece mounting part and a flame eruption mechanism; the rotating wheel mechanism is arranged on the mounting seat and comprises a rotating wheel which can be arranged in a rotating way; the to-be-tested part mounting part is arranged on the rotating wheel, has a preset distance with the central shaft of the rotating wheel and is used for mounting a to-be-tested part; the flame eruption mechanism is arranged on the mounting base and comprises a spray head, and the spray head is aligned to the mounting part of the to-be-tested part. The reliability detection device can only complete short-time and repeated ablation impact detection for a plurality of times on a piece to be tested, only considers the influence of temperature on an ablation-resistant material, cannot adjust pressure, cannot simulate the ablation resistance of the material under different pressure working conditions, cannot measure the temperature and the pressure, and cannot detect the piece to be tested comprehensively.
Patent CN110082475A discloses an experimental method and experimental apparatus for simulating ablation of a double-pulse solid rocket engine, the experimental method is as follows: and carrying out a first ablation experiment in the first rocket engine, separating the experiment section from the first convergence section after the experiment is finished, assembling the experiment section and the second convergence section into a second rocket engine, and carrying out a second ablation experiment in the second rocket engine after a certain time interval. The method can only study the influence of pulse interval time on the ablation characteristic of the heat-insulating material, and has high detection cost and no popularization.
Disclosure of Invention
The invention aims to provide a reliability inspection device for an ablation-resistant material, which can be used for inspecting the reliability of the ablation-resistant material and solving the problem of reliability detection of ablation impact of an ablation-resistant heat-insulating material under the combined action of temperature and pressure and in short time and variable load.
The technical solution for realizing the purpose of the invention is as follows: the invention discloses a reliability inspection device for an ablation-resistant material, belongs to the technical field of reliability inspection, and solves the problem of reliability inspection of ablation impact of the ablation-resistant heat-insulating material under the combined action of temperature and pressure in a short time and under variable load. The test device mainly comprises a combustion chamber, a nozzle seat and a nozzle, wherein a tested piece is arranged on the left side surface of the nozzle seat, propellant is filled in the combustion chamber, when the propellant burns, high-temperature and high-pressure gas is generated to carry out ablation impact on an ablation-resistant material, the pressure in the nozzle seat is controlled by replacing the nozzles with different throat diameters, and the ablation-resistant reliability of the tested piece under different pressure working conditions is simulated. This reliability detection device result is simple, and convenient operation can be to being tested the piece in the short time ablation impact detection to combustion chamber and spray tube all have the insulating layer, have guaranteed this reliability detection device's life greatly, and in addition, the propellant kind that the combustion chamber adopted, the size is different, can simulate different working pressure, the ablation of different operating time strikes the detection, can detect more comprehensively being tested the piece, has improved the efficiency that resistant ablation material reliability detected greatly.
Compared with the prior art, the invention has the remarkable advantages that:
(1) different kinds of propellants are adopted, gas with different pressures can be generated in the nozzle base, and the working environment of ablation-resistant materials with different pressures is simulated.
(2) The propellant with different sizes is adopted, so that the working environment of the ablation-resistant material under different working time lengths can be simulated.
(3) The nozzle structure with different throat diameters is replaced, and the nozzles with different throat diameters are selected, so that the nozzle base is in working environments with different pressures, different working conditions can be conveniently detected, and the reliability of the ablation-resistant material can be comprehensively detected.
(4) The propellant in the combustion chamber is ignited to generate high-temperature and high-pressure gas, when the gas passes through the nozzle seat, the gas flow direction deflects by 90 degrees, and great ablation impact is generated on the ablation-resistant material arranged on the nozzle seat.
(5) The combustion chamber and the spray pipe are internally coated with heat insulation layers, so that the service life of the reliability detection device is ensured.
(6) The traditional inspection device is mostly used for detecting through temperature, the influence factor of pressure intensity is added into the device, the influence of the temperature and the pressure intensity on the ablation-resistant material is comprehensively considered, and the result is more real and credible.
(7) The bottom of the nozzle base is provided with a temperature sensor and a pressure sensor, so that the temperature and the pressure of the ablation-resistant material can be measured in real time.
(8) Simple structure and convenient operation.
Drawings
FIG. 1 is a device for verifying the reliability of the ablation-resistant material of the present invention.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
With the development of technologies such as hypersonic aircrafts and scramjet engines, great requirements are made on the ablation resistance of materials, and therefore, the requirements on the reliability detection technology of ablation-resistant heat-insulating materials are increasingly increased. At present, the reliability detection device of the ablation-resistant heat-insulating material is only suitable for ablation conditions under steady-state long-term conditions, does not consider the influence factor of pressure intensity, and lacks a reliability detection device for ablation impact detection of the ablation-resistant heat-insulating material in a short time and under variable load.
Therefore, the present invention provides a new reliability detection device for ablation-resistant materials.
With reference to fig. 1, a reliability testing device for ablation-resistant materials comprises a combustion chamber (1), a first heat-insulating layer (2), a chemical fixing plate (3), a propellant (4), a chemical blocking plate (5), a nozzle base (6), a nozzle (8), an igniter (10), a temperature sensor (11) and a pressure sensor (12). The head of the nozzle seat (6) is connected with the combustion chamber (1) through threads, the bottom of the nozzle seat is provided with a tested piece (7), the nozzle seat (6) and the combustion chamber (1) form a first channel, the nozzle (8) is fixed at the bottom of the outer wall of the circumference of the nozzle seat (6) through threads and is communicated with the nozzle seat (6) to form a second channel, and the first channel is vertical to and communicated with the second channel. The material of the combustion chamber (1) is 45# steel and is cylindrical, the propellant (4) is installed in the combustion chamber (1), one end of the combustion chamber (1) is fixedly connected with the propellant fixing plate (3), the propellant fixing plate (3) plays a role in fixing the propellant (4) and serves as a plug to seal the end part of the combustion chamber (1); the other end of the combustion chamber (1) is connected with the head of the nozzle seat (6) through threads, the chemical blocking plate (5) is fixedly connected in the combustion chamber (1) and is positioned at the end part close to the nozzle seat (6) to play a role in fixing the propellant (4), and a plurality of fire transfer holes are formed in the chemical blocking plate (5); the inner side wall of the combustion chamber (1) is coated with a first heat insulation layer (2), so that the combustion chamber (1) cannot be ablated by a propellant (4), and the service life of the combustion chamber is prolonged; the igniter (10) is arranged at the throat part of the spray pipe (8), and the temperature sensor (11) and the pressure sensor (12) are fixed at the bottom of the spray pipe seat (6).
The fire transfer holes of the medicine baffle plate (5) comprise a central round hole and a plurality of fan-shaped holes which are uniformly distributed on the periphery, and the fan-shaped holes are distributed in an annular shape by taking the center of the medicine baffle plate (5) as a symmetrical point.
One side of the medicine fixing plate (3) is provided with a circular groove for fixing the propellant (4).
The spray pipe (8) adopts a Laval spray pipe structure, different working pressures in the spray pipe seat (6) can be ensured by replacing the spray pipes (8) with different throat diameters, different working conditions of the tested piece (7) are simulated, and the spray pipes (8) are made of tungsten copper infiltration material.
The igniter (10) adopts an electric igniter.
And a second heat insulation layer (9) is arranged in the spray pipe (8), so that the service life of the reliability detection device is greatly prolonged.
The temperature sensor (11) is used to measure the real-time temperature of the ablation-resistant material during the inspection process.
The pressure sensor (12) is used to measure the real-time pressure of the ablation resistant material during the inspection process.
The specific working principle of the device is as follows:
the igniter (10) starts to work, the generated pulse energy ignites the propellant (4) in the combustion chamber (1) through the nozzle seat (6), the propellant (4) in the combustion chamber (1) generates high-temperature and high-pressure fuel gas through complex physical change and violent chemical reaction, when the fuel gas passes through the nozzle seat (6), the air flow direction deflects for 90 degrees, great ablation impact is generated on a tested piece (7) on the nozzle seat (6), different working environments are simulated through replacing the nozzles (8) with different throat diameters, and the reliability of the tested piece (7) is comprehensively detected.
Claims (10)
1. A reliability inspection device of ablation-resistant material is characterized in that: comprises a combustion chamber (1), a medicine fixing plate (3), a propellant (4), a medicine blocking plate (5), a spray pipe seat (6), a spray pipe (8), an igniter (10), a temperature sensor (11) and a pressure sensor (12); the head of the nozzle seat (6) is connected with the combustion chamber (1), the bottom of the nozzle seat is provided with a tested piece (7), the nozzle seat (6) and the combustion chamber (1) form a first channel, the nozzle (8) is fixed at the bottom of the circumferential outer wall of the nozzle seat (6) and communicated with the nozzle seat (6) to form a second channel, the propellant (4) is arranged in the combustion chamber (1), one end of the combustion chamber (1) is fixedly connected with the propellant fixing plate (3), the propellant fixing plate (3) plays a role in fixing the propellant (4) and serves as a plug to seal the end of the combustion chamber (1); the chemical blocking plate (5) is fixedly connected in the combustion chamber (1) and is positioned at the end part close to the nozzle seat (6), and a plurality of fire transfer holes are formed on the chemical blocking plate (5); the igniter (10) is arranged at the throat part of the spray pipe (8), and the temperature sensor (11) and the pressure sensor (12) are fixed at the bottom of the spray pipe seat (6).
2. The ablation-resistant material reliability inspection device according to claim 1, characterized in that: the first channel is perpendicular to and communicates with the second channel.
3. The ablation-resistant material reliability inspection device according to claim 1, characterized in that: the material of the combustion chamber (1) is 45# steel and is cylindrical.
4. The ablation-resistant material reliability inspection device according to claim 1, characterized in that: the inner side wall of the combustion chamber (1) is coated with a first heat insulation layer (2), so that the combustion chamber (1) is prevented from being ablated by a propellant (4), and the service life of the combustion chamber is prolonged.
5. The ablation-resistant material reliability inspection device according to claim 1, characterized in that: the fire transfer holes of the medicine baffle plate (5) comprise a central round hole and a plurality of fan-shaped holes which are uniformly distributed on the periphery, and the fan-shaped holes are distributed in an annular shape by taking the center of the medicine baffle plate (5) as a symmetrical point.
6. The ablation-resistant material reliability inspection device according to claim 1, characterized in that: one side of the medicine fixing plate (3) is provided with a circular groove for fixing the propellant (4).
7. The ablation-resistant material reliability inspection device according to claim 1, characterized in that: the spray pipe (8) adopts a Laval spray pipe structure, different working pressures in the spray pipe seat (6) can be ensured by replacing the spray pipes (8) with different throat diameters, different working conditions of the tested piece (7) are simulated, and the spray pipes (8) are made of tungsten copper infiltration material.
8. The ablation-resistant material reliability inspection device according to claim 1, characterized in that: and a second heat insulation layer (9) is arranged in the spray pipe (8), so that the service life of the reliability detection device is greatly prolonged.
9. The ablation-resistant material reliability inspection device according to claim 1, characterized in that: the temperature sensor (11) is used to measure the real-time temperature of the ablation-resistant material during the inspection process.
10. The ablation-resistant material reliability inspection device according to claim 1, characterized in that: the pressure sensor (12) is used to measure the real-time pressure of the ablation resistant material during the inspection process.
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| CN201911230199.6A CN110985242A (en) | 2019-12-04 | 2019-12-04 | Reliability inspection device for ablation-resistant material |
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| CN201911230199.6A CN110985242A (en) | 2019-12-04 | 2019-12-04 | Reliability inspection device for ablation-resistant material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927652A (en) * | 2020-07-29 | 2020-11-13 | 南京理工大学 | Double-pulse solid rocket engine interlayer ablation carbonization controllable experimental device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204877715U (en) * | 2015-07-17 | 2015-12-16 | 南京理工大学 | Lotion propellant gas generator ignition based on solid rocket engine |
| CN109611239A (en) * | 2018-12-11 | 2019-04-12 | 上海新力动力设备研究所 | Gas generator powder column support construction |
| CN110425058A (en) * | 2019-08-18 | 2019-11-08 | 南京理工大学 | The soft interlayer ablation test device of Double pulse solid rocket motor |
-
2019
- 2019-12-04 CN CN201911230199.6A patent/CN110985242A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204877715U (en) * | 2015-07-17 | 2015-12-16 | 南京理工大学 | Lotion propellant gas generator ignition based on solid rocket engine |
| CN109611239A (en) * | 2018-12-11 | 2019-04-12 | 上海新力动力设备研究所 | Gas generator powder column support construction |
| CN110425058A (en) * | 2019-08-18 | 2019-11-08 | 南京理工大学 | The soft interlayer ablation test device of Double pulse solid rocket motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927652A (en) * | 2020-07-29 | 2020-11-13 | 南京理工大学 | Double-pulse solid rocket engine interlayer ablation carbonization controllable experimental device |
| CN111927652B (en) * | 2020-07-29 | 2022-06-10 | 南京理工大学 | Double-pulse solid rocket engine interlayer ablation carbonization controllable experimental device |
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Application publication date: 20200410 |