CN112083039B - Material ignition point test assessment device and assessment method - Google Patents
Material ignition point test assessment device and assessment method Download PDFInfo
- Publication number
- CN112083039B CN112083039B CN202011051851.0A CN202011051851A CN112083039B CN 112083039 B CN112083039 B CN 112083039B CN 202011051851 A CN202011051851 A CN 202011051851A CN 112083039 B CN112083039 B CN 112083039B
- Authority
- CN
- China
- Prior art keywords
- cooling
- working medium
- gas
- test piece
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
Abstract
The invention provides a material ignition point test and assessment device and method, which solve the problems that the existing material temperature performance data is limited, and the existing metal ignition test cannot provide high-temperature high-pressure oxygen enrichment conditions, so that the material ignition point is difficult to verify. A material ignition point test and assessment device comprises a gas generator, a water cooling section, a test piece clamping section, a monitoring section and a process spray pipe which are sequentially communicated; the gas generator is used for providing high-temperature and high-pressure oxygen-enriched gas for the test piece to be checked; the water cooling section is more than or equal to 600mm and is used for improving the uniformity of fuel gas; the water cooling section and the monitoring section are respectively provided with a temperature sensor and a pressure sensor for monitoring the temperature, the pressure and the pressure fluctuation condition of the front and the back of the test piece to be checked; the process spray pipe is used for controlling the inflow pressure of the oxygen-enriched fuel gas; the water cooling section, the test piece clamping section, the monitoring section and the process spray pipe are all made of high-temperature alloy materials.
Description
Technical Field
The invention belongs to a material performance test and assessment device, and particularly relates to a material ignition point test and assessment device and an assessment method.
Background
In liquid rocket engines, certain components (such as various components of a gas circuit structure, namely a gas circuit, a turbine stator, a rotor and the like) work in a high-temperature environment, and as the performance requirement of the engine is improved (such as a high-performance liquid oxygen kerosene afterburning cycle engine), the working environment of the engine components is more severe, and the working temperature also faces new challenges.
In order to adapt to a harsher working environment, the performance of the engine is improved on the basis that researchers master the performance of materials used by all parts in a high-temperature environment, but the temperature performance data of the current materials cannot provide strong data support for the research of a novel engine, and the existing metal ignition test cannot provide high-temperature high-pressure oxygen-enriched conditions, so that the ignition point of the materials is difficult to verify. Therefore, it is needed to design a new material ignition point test and check device, to fully check the temperature resistance limit of the material, to check whether the material meets the working requirement at the corresponding temperature, and to ensure the effectiveness of the engine material model selection.
Disclosure of Invention
The invention aims to solve the problems that the existing material temperature performance data are limited, and the existing metal ignition test cannot provide high-temperature high-pressure oxygen enrichment conditions, so that the ignition point of the material is difficult to verify, and provides a material ignition point test assessment device and an assessment method.
In order to achieve the above purpose, the technical solution provided by the present invention is:
the material ignition point test and assessment device is characterized by comprising a gas generator, a water cooling section, a test piece clamping section, a monitoring section and a process spray pipe which are sequentially communicated; the gas generator is used for providing high-temperature and high-pressure oxygen-enriched gas for the test piece to be checked; the length of the water cooling section is more than or equal to 600mm, so that the uniformity of the fuel gas is improved, in theory, the longer the length is, the more uniform the fuel gas flow field is, but the longer the body is, the more troublesome the fixation is, the cost of the whole device is increased, and the length is controlled to be not less than 600mm; the water cooling section and the monitoring section are respectively provided with a temperature sensor and a pressure sensor for monitoring the temperature, the pressure and the pressure fluctuation of the fuel gas at the front and the back of the test piece to be checked; the process spray pipe is used for controlling the incoming flow pressure of the oxygen-enriched fuel gas, and the incoming flow pressure can be changed by replacing the process spray pipes with different throat sizes; the water cooling section, the test piece clamping section, the monitoring section and the process spray pipe are all made of high-temperature alloy materials.
Further, in order to examine the temperature resistance limit and performance of the material in a high-temperature high-pressure gas flushing environment, the oxygen-enriched gas provided by the gas generator has the temperature of 800K-900K, the pressure of 12-16 MPa, the oxygen content of higher than 89%, the flow rate of 100-500 m/s and a wider examination range.
Preferably, in order to further improve the uniformity of the fuel gas, the water cooling section comprises two water-saving cold fuel gas pipes which are communicated with each other; the water-cooling gas pipe comprises a gas channel, a first flange and a second flange which are respectively arranged at two ends of the gas channel, and a cooling working medium inlet pipe joint and a cooling working medium outlet pipe joint which are arranged on the side wall of the gas channel, wherein the cooling working medium inlet pipe joint is close to the second flange, and the cooling working medium outlet pipe joint is close to the first flange; a cooling working medium inlet liquid collecting cavity is arranged at the joint of the cooling working medium inlet pipe joint and the gas channel, and a cooling working medium outlet liquid collecting cavity is arranged at the joint of the cooling working medium outlet pipe joint and the gas channel; a plurality of cooling channels extending along the axial direction of the gas channel are arranged in the side wall of the gas channel, one end of each cooling channel is communicated with the cooling medium inlet pipe joint through the cooling medium inlet liquid collecting cavity, and the other end of each cooling channel is communicated with the cooling medium outlet pipe joint through the cooling medium outlet liquid collecting cavity; the communication part of the cooling working medium inlet pipe joint and the cooling working medium inlet liquid collecting cavity and the communication part of the cooling working medium outlet pipe joint and the cooling working medium outlet liquid collecting cavity are respectively provided with a grid structure for transitional connection and flow equalization; the thickness of the grid structure is more than or equal to 5mm. Of course, only one section of water-cooled gas pipe meeting the length requirement can be adopted.
Preferably, in order to facilitate the installation of the temperature sensor and the pressure sensor, the outer wall of the gas channel is also provided with a plurality of gas temperature and pressure test interfaces; the cooling channel is communicated in a circumferential direction at a gas temperature and pressure test interface; in order to avoid the local overhigh temperature of the flange, one part of the cooling working medium inlet liquid collecting cavity is positioned at the outlet end of the cooling working medium inlet pipe joint, and the other part of the cooling working medium inlet liquid collecting cavity is positioned in the second flange; one part of the cooling working medium outlet liquid collecting cavity is positioned at the inlet end of the cooling working medium outlet pipe joint, and the other part of the cooling working medium outlet liquid collecting cavity is positioned in the first flange; the thickness of the inner wall of the gas channel at the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity is larger than that of the inner wall of the gas channel at the cooling channel.
Preferably, in order to make the flow of the cooling medium more uniform and improve the cooling effect, an included angle a1 between the inner wall of the cooling medium inlet pipe joint close to the second flange and the inner wall of the gas channel along the common axial section of the inner wall of the cooling medium inlet pipe joint and the inner wall of the cooling medium outlet pipe joint close to the first flange and the inner wall of the gas channel along the common axial section of the inner wall of the cooling medium inlet pipe joint and the inner wall of the gas channel are smaller than or equal to 40 degrees; the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity have the same structure and are all cavities with gradually changed cross sections, and the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity are divided into a large cavity, a middle cavity and a small cavity which are sequentially communicated from the flange end to the middle part of the gas channel; an included angle a3 between the outer wall of the small cavity and the inner wall of the gas channel along the common axial section of the small cavity and the inner wall of the gas channel is smaller than or equal to 40 degrees, an included angle a4 between the inner wall of the small cavity and the inner wall of the gas channel along the common axial section of the small cavity and the inner wall of the gas channel is smaller than or equal to 20 degrees, and an included angle a2 between the outer wall of the middle cavity and the inner wall of the gas channel along the common axial section of the inner wall of the middle cavity and the inner wall of the gas channel is smaller than or equal to 30 degrees; the included angle a6 between the section of the cooling channel at the outer side of the gas temperature and pressure testing interface and the bottom surface of the cooling channel is less than or equal to 45 degrees; the whole round platform structure that is in gas temperature and pressure test interface periphery, the contained angle a5 between round platform structure outer wall and the gas passageway inner wall along both common axial section is less than or equal to 45.
Preferably, the cross section of the inlet end of the cooling working medium inlet pipe joint is circular, the cross section of the outlet end is elliptical, the elliptical long axis is axially arranged along the outer wall of the gas channel, and the shape from the inlet end to the outlet end is gradually changed and smoothly transited; the cross section of the inlet end of the cooling working medium outlet pipe joint is elliptical, the elliptical long axis is axially arranged along the outer wall of the gas channel, the cross section of the outlet end is circular, and the shape from the inlet end to the outlet end is gradually changed and smoothly transited; the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity are annular cavities.
Preferably, the test piece clamping section comprises a test piece mounting table and a pressing plate; in order to avoid leakage of fuel gas and accidents, the test piece mounting table is hermetically mounted between a water cooling section and a monitoring section, a fuel gas flow passage is axially arranged in the test piece mounting table, and a test piece mounting groove to be checked is radially arranged in the test piece mounting table; in order to reduce the flow resistance, the inner wall of the test piece mounting table is in arc transition from the gas inlet end to the mounting groove, and the sectional area of the flow passage is gradually reduced; the pressing plate is in a ring shape, is arranged in the inner cavity of the test piece mounting table and is used for pressing the test piece to be checked (namely, the gas outlet end of the test piece mounting table enters the inner cavity of the test piece mounting table to press the test piece to be checked). The shape of the test piece can be designed according to the requirement, the coating can be sprayed on the surface of the test piece, the performance of the coating is checked, the mounting ends are reserved at the two ends of the test piece, the coating can not be coated on the mounting ends, the mounting sizes of the two ends are ensured, and the mounting is convenient.
Preferably, the circumference of the pressing plate is in threaded fit with the inner wall of the test piece mounting table, the test piece to be checked is pressed by a screwing mode, and a clamping groove is formed in the end face, close to the gas outlet end, of the pressing plate, so that screwing and dismounting by using tools are facilitated; the two pressing plates are used for preventing loosening by using double threads, and the test piece to be checked is sequentially pressed along the axial direction; in order to save test cost, the sizes of the mounting groove and the test pieces to be tested are adjusted, so that a plurality of test pieces to be tested are radially mounted on the mounting groove at the same time, and the purpose of testing a plurality of test pieces at one time is further met.
Preferably, the water-cooled gas pipe is integrally formed through 3D printing; the process spray pipe adopts a water cooling mode, and a milling groove structure is arranged between the inner wall and the outer wall of the process spray pipe, so that the process spray pipe is favorable for repeated use.
Meanwhile, the invention also provides an examination method adopting the material ignition point test examination device, which is characterized by comprising the following steps:
1) Fixedly mounting a test piece to be checked in a test piece clamping section, and assembling a material ignition point test checking device in place;
2) The assembled checking device is arranged on a test bed, and pre-test checking is carried out;
3) Starting the checking device to perform a checking test on the test piece, and recording the gas temperature, pressure and pressure fluctuation conditions before and after the test piece;
4) After the test is completed, the device to be checked is cooled, the test piece clamping section is disassembled from the water cooling section and the monitoring section, and the checked test piece is taken out;
5) And checking the checked test piece to obtain corresponding data of the material ignition point test, wherein the test piece checking is finished.
If more test pieces are to be checked, the method further comprises the following steps:
6) Fixedly mounting another batch of test pieces to be checked in the test piece clamping section, reinstalling the test piece clamping section between the water cooling section and the monitoring section, and repeating the steps 2) -5);
7) And (3) repeating the step 6) until all the test pieces to be checked are checked, and then removing the checking device from the test bed to complete the checking test.
The invention has the advantages that:
1. the invention has simple structure, adopts the gas generator, is a test environment of high-temperature high-pressure oxygen-enriched gas of a test piece to be checked, has high highest checking temperature, wide checking range and reliable test data, can comprehensively check the temperature resistance limit and performance of the material, checks whether the material meets the use requirement at the corresponding working temperature, solves the problem that the ignition point of the material is difficult to verify at present, and reduces the development risk of a novel engine (for example, a high-performance liquid oxygen kerosene after-combustion cycle engine).
2. The invention meets the conditions of high temperature (more than 800K), high pressure (more than 12 MPa), oxygen enrichment (more than 89% of oxygen content) and the gas flow rate simulates the inlet flow rate (more than 100 m/s) of the turbine stator blade of the engine for the first time; the test working condition environment is closer to the actual working condition of the engine, and the ignition point of the metal material is more fully checked; meanwhile, the assessment device can simulate the incoming flow temperature by adjusting the mixing ratio and the flow of the gas generator; by varying the throat size of the process nozzle, the incoming flow pressure is simulated.
3. The water-cooled gas pipe adopts the structural design facing the 3D printing process, realizes the whole unsupported design of a cooling working medium inlet pipe joint, a cooling working medium inlet liquid collecting cavity, a cooling channel and the like and the gas pipe, can meet the whole one-step forming requirement of the 3D printing technology, does not need a plurality of working procedures such as a rack, brazing, butt welding and the like in the traditional process link, greatly shortens the processing and turnover period of the product, has better consistency, connection strength and rigidity, more effective quality control and greatly reduces the development cost.
4. The grid structure of the water-cooled gas pipe arranged at the communication part of the pipe joint and the liquid collecting cavity has three functions: firstly, the gas channel outer wall and the liquid collecting cavity are connected in a transitional way; secondly, the cooling working medium can be prevented from directly impacting the inner wall of the liquid collecting cavity, and the inner wall of the liquid collecting cavity is protected; thirdly, the flow of the cooling working medium can be primarily distributed, and primary flow equalization is performed on the cooling working medium.
5. In the traditional gas channel with milling groove cooling, a liquid collecting cavity is positioned between the outer wall and the flange, and a gas pipeline at the flange part cannot be cooled; the water-cooling gas pipe has the advantages that the flange cooling and connecting functions are achieved, a part of the cooling medium inlet liquid collecting cavity and a part of the cooling medium outlet liquid collecting cavity penetrate into the corresponding end flanges, the flanges at the two ends are cooled, the local overhigh temperature of the flanges is avoided, and meanwhile the whole structure length is shortened.
6. The molded surfaces of the cooling working medium inlet pipe joint and the cooling working medium outlet pipe joint in the water-cooling gas pipe adopt a gradually-expanding mode, namely one end of the cooling working medium inlet pipe joint, which is used for being connected with an external interface, is round so as to be convenient for being in butt joint with a standard interface, and the other end of the cooling working medium inlet pipe joint is oval, so that the influence of the connection on the flange space can be effectively reduced while the flow area of the connection with a gas channel is effectively increased, the circumferential space between the outer wall of the gas channel and an end flange is fully utilized, and the complete smooth transition from a round port to an oval port is realized in a smaller design space; the effective flow area of the inlet channel is increased, so that the cooling working medium can be ensured to be filled in the liquid collecting cavity firstly and then uniformly flow to each circumferential cooling channel, and the defect that partial fuel gas pipeline is excessively high in temperature and structural failure is avoided due to uneven distribution of the flow of the cooling working medium in the circumferential cooling channels; the oval port and the liquid collecting cavity are integrally designed, so that the whole structure is more compact.
7. According to the invention, the characteristic angles of the cooling working medium inlet pipe joint and the cooling working medium outlet pipe joint of the water-cooling gas pipe are smaller than or equal to 40 degrees, the characteristic angle a2 of the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity is smaller than or equal to 30 degrees, a3 is smaller than or equal to 40 degrees, and a4 is smaller than or equal to 20 degrees, so that the structures in the integral forming process do not need to be added with support, the cooling working medium flows more uniformly, and the cooling effect is improved.
8. According to the water-cooling gas pipe, the variable cross-section design is adopted between the liquid collecting cavity of the cooling working medium inlet and the cooling channel, so that the thickness of the inner wall of the gas channel in the liquid collecting cavity area is relatively large, and the strength requirement can be met; on the other hand, the thickness of the inner wall of the gas channel in the liquid collecting cavity area is larger, so that the flow resistance is increased, the local throttling effect is achieved, and the liquid collecting cavity can be ensured to be filled with cooling working medium after entering the pipeline.
9. The water-cooling gas pipe can integrate the gas temperature and pressure test interface, the temperature sensor and the pressure sensor are convenient to install, the cooling channel is communicated in the circumferential direction at the gas temperature and pressure test interface, the outer circumference of the gas temperature and pressure test interface is in a circular truncated cone structure, and the smooth flow of working media at the gas temperature and pressure test interface can be ensured; and the included angle a5 between the outer wall of the circular truncated cone structure and the inner wall of the gas channel along the common axial section of the outer wall of the circular truncated cone structure and the inner wall of the gas channel is less than or equal to 45 degrees, the included angle a6 between the section of the outer side of the gas temperature and pressure testing interface and the bottom surface of the cooling channel is less than or equal to 45 degrees, the integral forming requirement of the 3D printing process can be met, the strength requirement is met, and the addition of a supporting structure is avoided.
10. The checking device can be repeatedly used, the checking method is simple and convenient to operate, the test piece is convenient to detach and replace, a plurality of test pieces can be installed in one test, the comparison test of multiple materials is convenient to carry out, and the test cost can be greatly reduced.
Drawings
FIG. 1 is a schematic diagram of a material ignition point test and assessment device according to the present invention;
FIG. 2 is a schematic view of a test piece clamping section in the material ignition point test and assessment device according to the present invention;
FIG. 3 is a schematic view of the structure of the test piece mounting table in the test piece clamping section;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a schematic view of the structure of the platen in the test strip holding section;
FIG. 6 is a cross-sectional view B-B of FIG. 5;
FIG. 7 is an isometric view of a water-cooled gas pipe in the material ignition point test and assessment device of the present invention;
FIG. 8 is a cross-sectional view of a water cooled gas pipe according to the present invention;
FIG. 9 is a partial cross-sectional view of the water-cooled fuel gas pipe cooling medium inlet nipple and cooling medium inlet plenum of the present invention;
FIG. 10 is a cross-sectional view of the water cooled burner tube at the cooling gallery of the present invention;
FIG. 11 is a partial view of a gas temperature and pressure test interface (with the outer wall of the pipe removed) at the cooling channel of the water cooled gas pipe in accordance with the present invention;
FIG. 12 is a partial cross-sectional view of a water cooled gas pipe cooling channel and a gas temperature and pressure test interface in accordance with the present invention;
FIG. 13 is a partial cross-sectional view II of the water cooled gas pipe cooling channel and the gas temperature and pressure test interface of the present invention;
the reference numerals are as follows:
the device comprises a 1-gas generator, a 2-water cooling section, a 3-test piece clamping section, a 4-monitoring section, a 5-process spray pipe, a 6-water cooling gas pipe, a 7-test piece mounting table and an 8-pressing plate; 9-mounting grooves, 10-clamping grooves, 11-test pieces to be checked, 12-first water-cooling gas pipes and 13-second water-cooling gas pipes; 14-first flange, 15-cooling working medium outlet liquid collecting cavity, 16-cooling channel, 17-cooling working medium inlet pipe joint, 18-second flange, 19-cooling working medium inlet liquid collecting cavity, 20-gas channel, 21-cooling working medium outlet pipe joint, 22-gas temperature and pressure test interface, 23-grid structure.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and specific examples:
as shown in fig. 1-13, a material ignition point test and assessment device comprises a gas generator 1, a water cooling section 2, a test piece clamping section 3, a monitoring section 4 and a process spray pipe 5 which are sequentially communicated; the water cooling section 2, the test piece clamping section 3, the monitoring section 4 and the process spray pipe 5 are all made of high-temperature alloy materials.
The gas generator 1 is used for providing high-temperature and high-pressure oxygen-enriched gas for the test piece 11 to be checked, in order to check the temperature resistance limit and performance of materials in a high-temperature and high-pressure gas flushing environment, the temperature of the available oxygen-enriched gas is 800K-900K, the pressure is 12-16 MPa, the oxygen content is higher than 89%, the flow rate is 100-500 m/s, the checking temperature range is wide, the test working condition environment is closer to the actual working condition of an engine, the material checking is more sufficient, and the inflow temperature of the test piece is simulated by adjusting the mixing ratio and flow of fuel and oxygen in the gas generator 1.
The length of the water cooling section 2 is 600mm, in order to promote the homogeneity of gas, the water cooling section 2 has two 300mm water cooling gas pipes 6 (respectively called a first water cooling gas pipe 12 and a second water cooling gas pipe 13) connected, as shown in fig. 7-8, two water cooling gas pipes 6 can be integrally formed through 3D printing, and include a gas channel 20, a first flange 14 and a second flange 18 respectively arranged at two ends of the gas channel 20, and a cooling medium inlet pipe joint 17 and a cooling medium outlet pipe joint 21 arranged on the side wall of the gas channel 20, wherein the cooling medium inlet pipe joint 17 is closer to the second flange 18, and the cooling medium outlet pipe joint 21 is closer to the first flange 14.
The cooling working medium inlet pipe joint 17 and the cooling working medium outlet pipe joint 21 are in a gradually-expanding mode, and the whole cooling working medium inlet pipe joint and the cooling working medium outlet pipe joint are in a kettle-mouth-like shape; the cross section of the inlet end of the cooling working medium inlet pipe joint 17 is circular, the cross section of the outlet end is elliptical, the shape from the inlet end to the outlet end is gradually changed and smoothly transits, and the elliptical long axis is axially arranged along the outer wall of the gas channel; the cross section of the inlet end of the cooling medium outlet pipe joint 21 is elliptical, the cross section of the outlet end is circular, the shape from the inlet end to the outlet end is gradually changed and smoothly transits, and the elliptical long axis is axially arranged along the outer wall of the gas channel.
A cooling medium inlet liquid collecting cavity 19 communicated with the outlet end of the cooling medium inlet pipe joint 17 is arranged at the joint of the cooling medium inlet pipe joint 17 and the gas channel 20, and a cooling medium outlet liquid collecting cavity 15 communicated with the inlet end of the cooling medium outlet pipe joint 21 is arranged at the joint of the cooling medium outlet pipe joint 21 and the gas channel 20. The cooling medium inlet liquid collecting cavity 19 and the cooling medium outlet liquid collecting cavity 15 are annular cavities.
The side wall of the gas channel 20 is of a hollow structure, a plurality of cooling channels 16 which extend along the axial direction of the gas channel 20 side by side at intervals and are uniformly distributed along the circumference of the gas channel 20 are arranged in the hollow structure, one end of each cooling channel 16 is communicated with the cooling medium inlet pipe joint 17 through the cooling medium inlet liquid collecting cavity 19, and the other end of each cooling channel 16 is communicated with the cooling medium outlet pipe joint 21 through the cooling medium outlet liquid collecting cavity 15. Preferably, the gap between two adjacent cooling channels 16 is more than or equal to 2mm, no dead angle exists, and smooth powder cleaning in the later stage of 3D printing can be ensured, and no excessive residues exist.
The outer wall of the gas channel 20 of the second water-cooling gas pipe 13 is also provided with a plurality of gas temperature and pressure test interfaces 22; the partial cooling channels 16 are locally truncated at the gas temperature and pressure test interface 22, and the locally truncated cooling channels are communicated with each other circumferentially along the gas temperature and pressure test interface 22. Here, the first water-cooled gas pipe may not be provided with a gas temperature and pressure test interface.
As shown in fig. 9, the communication part between the cooling medium inlet pipe joint 17 and the cooling medium inlet liquid collecting cavity 19, and the communication part between the cooling medium outlet pipe joint 21 and the cooling medium outlet liquid collecting cavity 15 are respectively provided with a grid structure 23 with the thickness of more than or equal to 5mm for flow equalization, and the grid structure 23 plays roles of transitional connection and preliminary distribution of the flow of the cooling medium. To ensure strength, the thickness of the inner wall of the gas channel 20 at the cooling medium inlet plenum 19 and the cooling medium outlet plenum 15 is greater than the thickness of the inner wall of the gas channel 20 at the cooling channel 16.
In order to shorten the overall structure length and achieve the functions of flange cooling and connection, when the water-cooling gas pipe 6 is designed, a part of a cooling working medium inlet liquid collecting cavity 19 is positioned at the outlet end of the cooling working medium inlet pipe joint 17, and the other part of the cooling working medium inlet liquid collecting cavity is positioned in the second flange 18; likewise, the cooling medium outlet plenum 15 is partially located at the inlet end of the cooling medium outlet nipple 21 and partially located within the first flange 14.
As shown in fig. 9, an included angle a1 between an inner wall of the cooling medium inlet pipe joint 17 closer to the second flange 18 and an inner wall of the gas passage 20 along a common axial section thereof is equal to or smaller than 40 °, and similarly, an included angle between an inner wall of the cooling medium outlet pipe joint 21 closer to the first flange 14 and an inner wall of the gas passage 20 along a common axial section thereof is equal to or smaller than 40 ° (not shown in the drawings, and only the included angle a1 is shown in the drawings as an example); the cooling working medium inlet liquid collecting cavity 19 and the cooling working medium outlet liquid collecting cavity 15 have the same structure and are all cavities with gradually changed cross sections, and the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity are divided into a large cavity, a middle cavity and a small cavity which are communicated in sequence from a flange end to the middle part of the fuel gas channel 20; an included angle a3 between the outer wall of the small cavity and the inner wall of the gas channel 20 along the common axial section of the small cavity and the inner wall of the gas channel 20 is smaller than or equal to 40 degrees, an included angle a4 between the inner wall of the small cavity and the inner wall of the gas channel 20 along the common axial section of the small cavity and the inner wall of the gas channel 20 is smaller than or equal to 20 degrees, and an included angle a2 between the outer wall of the middle cavity and the inner wall of the gas channel 20 along the common axial section of the inner wall of the middle cavity and the inner wall of the gas channel is smaller than or equal to 30 degrees.
As shown in fig. 10-13, the included angle a6 between the cross section of the cooling channel 16 outside the fuel gas temperature and pressure testing interface 22 and the bottom surface of the cooling channel 16 is less than or equal to 45 degrees; the whole periphery of the gas temperature and pressure test interface 22 is in a circular truncated cone structure, and an included angle a5 between the outer wall of the circular truncated cone structure and the inner wall of the gas channel 20 along the common axial section of the outer wall and the inner wall is less than or equal to 45 degrees.
The test piece clamping section 3 comprises a test piece mounting table 7 and a pressing plate 8; the test piece mounting table 7 is mounted between the water cooling section 2 and the monitoring section 4 in a sealing way by using a long bolt, a fuel gas flow passage is arranged in the test piece mounting table along the axial direction, and a rectangular mounting groove 9 for mounting a test piece 11 to be checked is arranged in the middle of the test piece mounting table along the radial direction; in order to reduce the flow resistance, the inner wall of the test piece mounting table 7 is in arc transition from the gas inlet end to the mounting groove 9, and the sectional area of the flow passage is gradually reduced; the pressing plate 8 is in a ring shape, and enters the inner cavity of the test piece mounting table 7 from the gas outlet end of the test piece mounting table 7 to press the test piece 11 to be checked. The shape of the test piece can be designed according to the requirement, the coating can be sprayed on the surface of the test piece, the performance of the coating is checked, the mounting ends are reserved at the two ends of the test piece, the coating can not be coated on the mounting ends, the mounting sizes of the two ends are ensured, and the mounting is convenient. The two pressing plates 8 are used for sequentially pressing the test piece 11 to be checked along the axial direction, each circumferential direction is matched with the inner wall of the test piece mounting table 7 by adopting threads, the test piece 11 to be checked is pressed by adopting a screwing mode, and the two-way threads are used for preventing loosening; and the clamping groove 10 is formed in the end face, close to the gas outlet end, of the pressing plate 8, so that the tool is convenient to screw and detach. In order to save test cost, the sizes of the mounting groove 9 and the test pieces 11 to be tested are adjusted, so that a plurality of test pieces 11 to be tested are simultaneously mounted on the mounting groove 9 along the radial direction, and the purpose of testing a plurality of test pieces at a time is further met.
The second water-cooling gas pipe 13 and the monitoring section 4 are respectively provided with a temperature sensor and a pressure sensor for monitoring the gas temperature, the pressure and the pressure fluctuation condition in the front and the back of the test piece 11 to be checked.
The process spray pipe 5 is used for controlling the inflow pressure of the oxygen-enriched fuel gas, the inflow pressure can be adjusted by using the process spray pipes 5 with different throats, the process spray pipes 5 adopt a water cooling mode, and a milling groove structure is arranged between the inner wall and the outer wall of the process spray pipes, so that the process spray pipes are beneficial to repeated use.
The assessment method adopting the material ignition point test assessment device comprises the following steps:
1) Fixedly mounting a test piece to be checked in a test piece clamping section, and assembling a material ignition point test checking device in place;
1.1 The gas generator is connected with a first flange of a first water-cooling gas pipe in a sealing way through bolts;
1.2 The second flange of the first water-cooling gas pipe is connected with the first flange of the second water-cooling gas pipe in a sealing way through bolts;
1.3 The monitoring section is connected with the process spray pipe through bolts;
1.4 Mounting the test piece(s) to be checked in a mounting groove of a test piece mounting table;
1.5 Using a tool to sequentially screw in two pressing plates to compress the test piece to be tested, and completing the assembly of the test piece clamping section;
1.6 The test piece clamping section with the test piece is arranged between the water cooling section and the monitoring section, and the long bolt is screwed up through flanges on the water cooling section and the monitoring section, so that the test piece clamping section is pressed and fixed;
the order of 1.1) to 1.5) may be changed according to actual operations.
2) The assembled checking device is arranged on a test bed, and pre-test checking is carried out to ensure safety;
3) Starting an assessment device to carry out an assessment test on the test piece, and recording the gas temperature, pressure and pressure fluctuation conditions before and after the test piece;
4) After the test is completed, the device to be checked is cooled, the test piece clamping section is disassembled from the water cooling section and the monitoring section, and the checked test piece is taken out;
4.1 The test is completed, the device to be checked is cooled, and the connecting piece of the test section and the process spray pipe is carefully taken down;
4.2 Carefully remove the test strip gripping section;
4.3 Using a tool to screw out the two pressing plates in sequence;
4.4 Taking out the examined test piece;
5) And checking the checked test piece to obtain corresponding data of the material ignition point test, wherein the test piece checking is finished.
6) Fixedly mounting another batch of test pieces to be checked in the test piece clamping section, reinstalling the test piece clamping section between the water cooling section and the monitoring section, and repeating the steps 2) to 5);
7) And (3) repeating the step 6) until all the test pieces to be checked are checked, and then removing the checking device from the test bed to complete the checking test.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a material ignition point test examination device which characterized in that: comprises a gas generator (1), a water cooling section (2), a test piece clamping section (3), a monitoring section (4) and a process spray pipe (5) which are communicated in sequence;
the gas generator (1) is used for providing high-temperature and high-pressure oxygen-enriched gas for the test piece (11) to be checked;
the temperature of the oxygen-enriched gas provided by the gas generator (1) is 800-900K, the pressure is 12-16 MPa, the oxygen content is higher than 89%, and the flow rate is 100-500 m/s;
the length of the water cooling section (2) is more than or equal to 600mm;
the water cooling section (2) and the monitoring section (4) are respectively provided with a temperature sensor and a pressure sensor for monitoring the gas temperature, pressure and pressure fluctuation condition in the front and the back of the test piece (11) to be checked;
the process spray pipe (5) is used for controlling the inflow pressure of the oxygen-enriched fuel gas;
the water cooling section (2), the test piece clamping section (3), the monitoring section (4) and the process spray pipe (5) are made of high-temperature alloy materials;
the test piece clamping section (3) comprises a test piece mounting table (7) and a pressing plate (8);
the test piece mounting table (7) is hermetically mounted between the water cooling section (2) and the monitoring section (4), a fuel gas flow passage is axially arranged in the test piece mounting table, and a test piece (11) mounting groove (9) to be checked is radially arranged in the test piece mounting table;
the inner wall of the test piece mounting table (7) is in arc transition from the gas inlet end to the mounting groove (9), and the sectional area of the flow channel is gradually reduced;
the pressing plate (8) is in a ring shape, is arranged in the inner cavity of the test piece mounting table (7) and is used for pressing the test piece (11) to be checked;
the water cooling section (2) comprises two water-saving cold gas pipes (6) which are communicated with each other;
the water-cooling gas pipe (6) comprises a gas channel (20), a first flange (14) and a second flange (18) which are respectively arranged at two ends of the gas channel (20), and a cooling working medium inlet pipe joint (17) and a cooling working medium outlet pipe joint (21) which are arranged on the side wall of the gas channel (20), wherein the cooling working medium inlet pipe joint (17) is close to the second flange (18), and the cooling working medium outlet pipe joint (21) is close to the first flange (14);
a cooling working medium inlet liquid collecting cavity (19) is arranged at the joint of the cooling working medium inlet pipe joint (17) and the gas channel (20), and a cooling working medium outlet liquid collecting cavity (15) is arranged at the joint of the cooling working medium outlet pipe joint (21) and the gas channel (20);
a plurality of cooling channels (16) extending along the axial direction of the gas channel (20) are arranged in the side wall of the gas channel (20), one end of each cooling channel (16) is communicated with a cooling working medium inlet pipe joint (17) through a cooling working medium inlet liquid collecting cavity (19), and the other end of each cooling channel is communicated with a cooling working medium outlet pipe joint (21) through a cooling working medium outlet liquid collecting cavity (15);
the outer wall of the gas channel (20) is also provided with a plurality of gas temperature and pressure test interfaces (22); the cooling channel (16) is communicated in a circumferential direction at a gas temperature and pressure test interface (22);
an included angle a1 between the inner wall of the cooling medium inlet pipe joint (17) close to the second flange (18) and the inner wall of the gas channel (20) along the common axial section of the two, and an included angle between the inner wall of the cooling medium outlet pipe joint (21) close to the first flange (14) and the inner wall of the gas channel (20) along the common axial section of the two are smaller than or equal to 40 degrees;
the cooling working medium inlet liquid collecting cavity (19) and the cooling working medium outlet liquid collecting cavity (15) have the same structure and are all cavities with gradually changed cross sections, and the cooling working medium inlet liquid collecting cavity and the cooling working medium outlet liquid collecting cavity are divided into a large cavity, a middle cavity and a small cavity which are communicated in sequence from a flange end to the middle part of the fuel gas channel (20); an included angle a3 between the outer wall of the small cavity and the inner wall of the gas channel (20) along the common axial section of the small cavity and the gas channel is smaller than or equal to 40 degrees, an included angle a4 between the inner wall of the small cavity and the inner wall of the gas channel (20) along the common axial section of the small cavity and the gas channel is smaller than or equal to 20 degrees, and an included angle a2 between the outer wall of the middle cavity and the inner wall of the gas channel (20) along the common axial section of the small cavity and the gas channel is smaller than or equal to 30 degrees;
the included angle a6 between the section of the cooling channel (16) at the outer side of the fuel gas temperature and pressure testing interface (22) and the bottom surface of the cooling channel (16) is less than or equal to 45 degrees;
the whole periphery of the gas temperature and pressure test interface (22) is in a circular truncated cone structure, and an included angle a5 between the outer wall of the circular truncated cone structure and the inner wall of the gas channel (20) along the common axial section of the outer wall and the inner wall is less than or equal to 45 degrees.
2. The material ignition point test evaluating apparatus according to claim 1, wherein:
the communication part of the cooling working medium inlet pipe joint (17) and the cooling working medium inlet liquid collecting cavity (19) and the communication part of the cooling working medium outlet pipe joint (21) and the cooling working medium outlet liquid collecting cavity (15) are respectively provided with a grid structure (23) for transitional connection and flow equalization; the thickness of the grid structure (23) is more than or equal to 5mm.
3. The material ignition point test evaluating apparatus according to claim 2, wherein:
a part of the cooling working medium inlet liquid collecting cavity (19) is positioned at the outlet end of the cooling working medium inlet pipe joint (17), and the other part of the cooling working medium inlet liquid collecting cavity is positioned in the second flange (18); part of the cooling working medium outlet liquid collecting cavity (15) is positioned at the inlet end of the cooling working medium outlet pipe joint (21), and the other part of the cooling working medium outlet liquid collecting cavity is positioned in the first flange (14);
the thickness of the inner wall of the gas channel (20) at the cooling working medium inlet liquid collecting cavity (19) and the cooling working medium outlet liquid collecting cavity (15) is larger than that of the inner wall of the gas channel (20) at the cooling channel (16).
4. A material ignition point test evaluating apparatus according to claim 3, wherein:
the cross section of the inlet end of the cooling working medium inlet pipe joint (17) is circular, the cross section of the outlet end is elliptical, and the elliptical long axis is axially arranged along the outer wall of the gas channel (20), and the shape from the inlet end to the outlet end is gradually changed and smoothly transited; the cross section of the inlet end of the cooling working medium outlet pipe joint (21) is elliptical, the elliptical long axis is axially arranged along the outer wall of the gas channel (20), the cross section of the outlet end is circular, and the shape from the inlet end to the outlet end is gradually changed and smoothly transited;
the cooling working medium inlet liquid collecting cavity (19) and the cooling working medium outlet liquid collecting cavity (15) are annular cavities.
5. The material ignition point test evaluating apparatus according to claim 4, wherein:
the circumference of the pressing plate (8) is in threaded fit with the inner wall of the test piece mounting table (7), and a clamping groove (10) is formed in the end face, close to the gas outlet end, of the pressing plate (8);
the two pressing plates (8) are used for sequentially pressing the test piece (11) to be checked along the axial direction;
and a plurality of test pieces (11) to be checked are simultaneously installed on the installation groove (9).
6. The material ignition point test evaluating apparatus according to claim 5, wherein:
the water-cooling gas pipe (6) is integrally formed through 3D printing;
the process spray pipe (5) adopts a water cooling mode, and a milling groove structure is arranged between the inner wall and the outer wall of the process spray pipe.
7. An inspection method using the material ignition point test inspection apparatus according to any one of claims 1 to 6, characterized by comprising the steps of:
1) Fixedly mounting a test piece to be checked in a test piece clamping section, and assembling a material ignition point test checking device in place;
2) Installing the assembled checking device in the step 1) on a test bed, and checking before testing;
3) Starting the checking device after the checking in the step 2), performing a checking test on a test piece to be checked, and recording the gas temperature, pressure and pressure fluctuation condition before and after the test piece;
4) After the test is completed, the device to be checked is cooled, the test piece clamping section is disassembled from the water cooling section and the monitoring section, and the checked test piece is taken out;
5) And checking the checked test piece to obtain corresponding data of the material ignition point test, wherein the test piece checking is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011051851.0A CN112083039B (en) | 2020-09-29 | 2020-09-29 | Material ignition point test assessment device and assessment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011051851.0A CN112083039B (en) | 2020-09-29 | 2020-09-29 | Material ignition point test assessment device and assessment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112083039A CN112083039A (en) | 2020-12-15 |
| CN112083039B true CN112083039B (en) | 2023-08-08 |
Family
ID=73730460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011051851.0A Active CN112083039B (en) | 2020-09-29 | 2020-09-29 | Material ignition point test assessment device and assessment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112083039B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429474A (en) * | 1945-04-25 | 1947-10-21 | Little Inc A | Apparatus for determining the vapor content of a gas |
| CN2303230Y (en) * | 1997-02-04 | 1999-01-06 | 南通石墨设备设计研究所 | Intensive heat conducting sleeve type cooling pipeline for high temp. gas burner having universal expansion joint |
| CN101393098A (en) * | 2008-10-13 | 2009-03-25 | 查柏林 | Material ablation detection device and method in high-temperature gas |
| WO2014107827A1 (en) * | 2013-01-10 | 2014-07-17 | 湘潭大学 | Testing device for simulating service environment of thermal barrier coating and detecting failure of thermal barrier coating in real time |
| CN104573247A (en) * | 2015-01-11 | 2015-04-29 | 吉林大学 | Optimizing method of simplified model cooling structure of transition section |
| DE102013113600A1 (en) * | 2013-12-06 | 2015-06-11 | Technische Universität Dresden | Test device and high-focus heater for generating high heat flux densities |
| CN105317586A (en) * | 2014-07-21 | 2016-02-10 | 北京航天动力研究所 | High-flow single-inlet annular liquid collecting chamber flow-equilibrating device |
| CN106640424A (en) * | 2016-10-26 | 2017-05-10 | 湖北航天技术研究院总体设计所 | Combustion chamber of liquid rocket engine |
| CN109827191A (en) * | 2019-01-17 | 2019-05-31 | 上海空间推进研究所 | A kind of double cooling re-generatively cooled body portion structures of liquid-propellant rocket engine |
| CN110594036A (en) * | 2019-08-23 | 2019-12-20 | 西北工业大学 | Active cooling double-nozzle support plate ejection rocket of rocket-based combined cycle engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7174797B2 (en) * | 2002-10-15 | 2007-02-13 | Florida Turbine Technologies, Inc. | High temperature and pressure testing facility |
-
2020
- 2020-09-29 CN CN202011051851.0A patent/CN112083039B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429474A (en) * | 1945-04-25 | 1947-10-21 | Little Inc A | Apparatus for determining the vapor content of a gas |
| CN2303230Y (en) * | 1997-02-04 | 1999-01-06 | 南通石墨设备设计研究所 | Intensive heat conducting sleeve type cooling pipeline for high temp. gas burner having universal expansion joint |
| CN101393098A (en) * | 2008-10-13 | 2009-03-25 | 查柏林 | Material ablation detection device and method in high-temperature gas |
| WO2014107827A1 (en) * | 2013-01-10 | 2014-07-17 | 湘潭大学 | Testing device for simulating service environment of thermal barrier coating and detecting failure of thermal barrier coating in real time |
| DE102013113600A1 (en) * | 2013-12-06 | 2015-06-11 | Technische Universität Dresden | Test device and high-focus heater for generating high heat flux densities |
| CN105317586A (en) * | 2014-07-21 | 2016-02-10 | 北京航天动力研究所 | High-flow single-inlet annular liquid collecting chamber flow-equilibrating device |
| CN104573247A (en) * | 2015-01-11 | 2015-04-29 | 吉林大学 | Optimizing method of simplified model cooling structure of transition section |
| CN106640424A (en) * | 2016-10-26 | 2017-05-10 | 湖北航天技术研究院总体设计所 | Combustion chamber of liquid rocket engine |
| CN109827191A (en) * | 2019-01-17 | 2019-05-31 | 上海空间推进研究所 | A kind of double cooling re-generatively cooled body portion structures of liquid-propellant rocket engine |
| CN110594036A (en) * | 2019-08-23 | 2019-12-20 | 西北工业大学 | Active cooling double-nozzle support plate ejection rocket of rocket-based combined cycle engine |
Non-Patent Citations (1)
| Title |
|---|
| 不同冷却方式对中心锥冷却效果的影响;李 卒等;《空军工程大学学报（自然科学版）》;第14卷(第4期);第5-8页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112083039A (en) | 2020-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112727860B (en) | Structure for high-Mach-number molded surface spray pipe water-cooling throat of hypersonic wind tunnel | |
| CN112083039B (en) | Material ignition point test assessment device and assessment method | |
| CN112253334B (en) | Gas pipeline integrated with cooling channel | |
| CN211162349U (en) | Pipe welding seam back protection device | |
| CN112763309B (en) | Thin-wall circular pipe hydraulic test device and test method | |
| CN208742326U (en) | A kind of fluid mixing apparatus | |
| CN212296504U (en) | Nuclear power steam turbine high pressure cylinder end steam leakage treatment device | |
| CN116085830A (en) | Lead hole sealing structure of combustion chamber flame tube wall thermocouple and dismounting method thereof | |
| CN214427123U (en) | Thin-wall round pipe hydraulic test device | |
| CN113714607B (en) | Method for processing main fuel pipe of gas turbine | |
| CN213336683U (en) | Pressure test tool for tube bundle of air cooler | |
| CN213317740U (en) | Clamp for machining straight tee joint part through lathe | |
| CN2185366Y (en) | Eccentric removable joint | |
| CN210389054U (en) | Constant-pressure rapid assembling and disassembling airtight special tool | |
| CN207730075U (en) | A kind of segmented heat exchanger structure | |
| CN220063271U (en) | Pipeline tightness detection tool with steps and capable of being replaced flexibly and disassembled quickly | |
| CN212298590U (en) | Synchronous pressure testing device for natural gas module skid-mounted pipeline system | |
| CN111315062A (en) | Pressure ring for integrally cast closed submerged arc furnace | |
| CN216632973U (en) | Titanium alloy thin wall barrel argon arc welds type protection device that rises | |
| CN218744883U (en) | Oil way distributor of numerical control lathe | |
| CN215865644U (en) | Flange simulation rack for primary side tightness test of nuclear power station steam generator | |
| CN212443150U (en) | Spray pipe cooling device | |
| CN217340321U (en) | A filter and pipeline assembly for pipeline | |
| CN219815081U (en) | Automatic fire extinguisher guided by pipeline | |
| CN219755644U (en) | Pipeline connection flange |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |