CN114280214B - Solid propellant combustion surface maintaining device and use method - Google Patents
Solid propellant combustion surface maintaining device and use method Download PDFInfo
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- CN114280214B CN114280214B CN202111464481.8A CN202111464481A CN114280214B CN 114280214 B CN114280214 B CN 114280214B CN 202111464481 A CN202111464481 A CN 202111464481A CN 114280214 B CN114280214 B CN 114280214B
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Abstract
The invention discloses a solid propellant combustion surface maintaining device and a using method thereof, wherein the solid propellant combustion surface maintaining device comprises a sample table, a horizontal displacement adjusting mechanism, a vertical displacement adjusting mechanism, a supporting seat, a sample table connecting piece and an ignition device; the horizontal displacement adjusting mechanism comprises a horizontal guide rail and a horizontal guide rail limiter, a first guide groove is formed in the supporting seat, and the horizontal guide rail can move back and forth along the direction of the first guide groove; the vertical displacement adjusting mechanism comprises a vertical support, a vertical guide rail, a sliding block, a power system and a synchronous belt transmission mechanism; the sample platform is connected with the sliding block through the sample platform connecting piece, is provided with the sample standing groove on the sample platform, and the size of sample standing groove is adjustable, is provided with near the sample standing groove ignition. The solid propellant combustion surface maintaining device has compact structural design and smaller whole volume; the method can compensate the retreating of the solid propellant combustion surface in real time, maintain the stability of the solid propellant combustion surface and ensure the smooth detection of the specific position.
Description
Technical Field
The invention belongs to the technical field of solid fuel propellant combustion surface component detection, and particularly relates to a solid propellant combustion surface maintaining device and a using method thereof.
Background
In-situ real-time detection of the combustion surface components of the solid propellant is a key technology for understanding the combustion mechanism of the solid propellant. The detection means for the combustion components of the solid propellant mostly adopts the means of decomposition process heat detection, combustion final product analysis, combustion surface structure characterization and the like. The existing real-time online characterization means for the solid propellant combustion process is relatively deficient, and the main reason is that the solid propellant is different from the general liquid fuel characterization, in the combustion process, the combustion surface gradually moves back along with the combustion of the solid propellant, and the position of a combustion zone is always changed. A relatively common approach is to use planar light detection (PLIF for example Combustion and flame,2012,159 (1), 427-427) to counteract the effect of solid propellant burnout by parallel detection of one plane. However, the detection means is generally expensive, and is not beneficial to large-area popularization. The direct-pushing type solid propellant combustion surface maintaining device (application number 201910105833.7) is designed in northwest industrial university and the like, and the moving speed of the solid propellant is maintained through a piston driving connecting rod, but the device has the defects of large size, narrow application range and the like, and meanwhile, the direct-pushing type solid propellant combustion surface maintaining device has the risk of instrument damage caused by potential failure of a limiting device. How to counteract the invariable and error caused by the movement of the combustion surface to the accuracy of detection in the solid propellant combustion process is still a difficult problem of the development of solid propellant combustion diagnosis at present.
Disclosure of Invention
In order to solve the technical problems, the invention provides a solid propellant combustion surface maintaining device and a using method thereof, wherein the moving speed of the solid propellant combustion surface is regulated according to the different combustion speeds of the solid propellant, and the relative stability of the combustion surface position in the combustion process of the solid propellant is maintained.
The invention is realized by the following technical scheme:
the invention discloses a solid propellant combustion surface maintaining device which comprises a sample table, a horizontal displacement adjusting mechanism for adjusting the horizontal position of the sample table, a vertical displacement adjusting mechanism for adjusting the vertical position of the sample table, a supporting seat, a sample table connecting piece and an ignition device, wherein the horizontal displacement adjusting mechanism is arranged on the sample table;
the horizontal displacement adjusting mechanism comprises a horizontal guide rail and a horizontal guide rail limiter, a first guide groove is formed in the supporting seat, and the horizontal guide rail can move back and forth along the direction of the first guide groove; the horizontal guide rail limiter is connected with the horizontal guide rail and is used for fixing the position of the horizontal guide rail on the supporting seat;
the vertical displacement adjusting mechanism comprises a vertical support, a vertical guide rail, a sliding block, a power system and a synchronous belt transmission mechanism; the vertical guide rail is connected to the vertical support, the vertical support and the power system are both connected to the horizontal guide rail, two ends of the synchronous belt transmission mechanism are respectively connected to the output end of the power system and the vertical support, and the transmission belt of the synchronous belt transmission mechanism moves along the vertical direction; the sliding block is provided with a second guide groove matched with the vertical guide rail, the sliding block is connected with a transmission belt, and the transmission belt moves to drive the sliding block to move up and down along the vertical guide rail;
the sample platform is connected with the sliding block through the sample platform connecting piece, be provided with the sample standing groove on the sample platform, the size of sample standing groove is adjustable, be provided with near the sample standing groove ignition.
Preferably, the horizontal guide rail limiter is of an annular sleeve structure, the horizontal guide rail and the supporting seat are installed in the annular sleeve in a matched mode, the annular sleeve is fixed with the horizontal guide rail, holes for inserting limiting screws are formed in the side wall of the annular sleeve, and the relative positions of the annular sleeve and the supporting seat are fixed through the limiting screws.
Preferably, the sliding block is connected with the transmission belt through a limiting buckle, the limiting buckle comprises an L-shaped plate and a first connecting plate, one end of the L-shaped plate is connected with the sliding block, the other end of the L-shaped plate is connected with the first connecting plate through a bolt, and the transmission belt is clamped between the L-shaped plate and the first connecting plate.
Preferably, the vertical support comprises a vertical plate, a cantilever and a second connecting plate, wherein the bottom of the vertical plate is connected with the horizontal guide rail, the cantilever is connected to the top of the vertical plate, the second connecting plate is connected to the tail end of the cantilever, and the second connecting plate is connected with a driven wheel of the synchronous belt transmission mechanism; the vertical guide rail is connected to the vertical plate.
Preferably, the second guide groove is a dovetail groove.
Preferably, the sample stage comprises an adjusting plate, a fixing plate, a guide rod and a spring; the adjusting plate is provided with a semi-annular cavity with one side open; the fixing plate is connected to the sample table connecting piece, a guide hole and a protrusion are formed in the fixing plate, one end of the guide rod is fixed to the adjusting plate, the other end of the guide rod is inserted into the guide hole, the guide rod drives the adjusting plate to axially move back and forth along the guide hole, the protrusion is matched with an opening of the semi-annular cavity, and the outermost edge of the protrusion and the semi-annular cavity surround to form the sample placing groove; the two ends of the spring are respectively connected to the fixed plate and the adjusting plate.
Preferably, the vertical guide rail, the power system and the synchronous belt transmission mechanism are arranged on one side of the vertical support, and the sample table is arranged on the other side of the vertical support; the sample platform connecting piece is a special-shaped plate which is bent for a plurality of times, one end of the special-shaped plate is connected with the sliding block, and the other end of the special-shaped plate is connected with the sample platform.
Preferably, the ignition device is a binding post arranged near the sample placing groove, the binding post is a copper post, and an insulating layer is arranged on the contact surface of the binding post and the sample table.
The invention also discloses a using method of the solid propellant combustion surface maintaining device, which comprises the following steps:
step 1, preparing a solid propellant grain, and ensuring that the upper section and the lower section of the grain are smooth;
step 2, testing the burning speed data of the solid propellant grains under the test environment pressure;
step 3, fixing the whole solid propellant combustion surface maintaining device in a test environment through a supporting seat, adjusting the position of the sample table in the horizontal direction through a horizontal guide rail, and fixing the position of the horizontal guide rail through a horizontal guide rail limiter;
step 4, fixing the solid propellant grains in a sample placing groove of a sample stage;
and 5, setting the moving speed of the sample stage so that the moving speed of the sample stage is equal to the burning speed of the burning surface of the solid propellant grains.
Compared with the prior art, the invention has the beneficial effects that:
the solid propellant combustion surface maintaining device has compact structural design, small overall volume, can realize random adjustment in the horizontal direction and the vertical direction, and can be suitable for in-situ detection of various testing environments or scenes; the device can compensate the back movement of the solid propellant combustion surface in real time, maintain the stability of the solid propellant combustion surface and ensure the smooth detection of a specific position; the sample placing groove of the sample stage of the device is adjustable in size and can be suitable for solid propellants with different sizes.
Other advantages of the present invention are described in detail in the detailed description.
Drawings
Fig. 1 is a front left view of a solid propellant fuel retaining device according to an embodiment of the present invention.
Fig. 2 is a rear right side view of a solid propellant fuel retaining device according to an embodiment of the present invention.
Fig. 3 is a rear left view of a solid propellant fuel retaining device according to an embodiment of the present invention.
Fig. 4 is a schematic view of a vertical displacement adjustment mechanism and a power system according to an embodiment of the present invention.
Fig. 5 is a schematic diagram showing connection between a sample stage and a slide block according to an embodiment of the present invention.
FIG. 6 is a schematic view of a sample stage connector according to an embodiment of the present invention.
Fig. 7 is a partial enlarged view of a sample stage portion of a solid propellant fuel retaining device according to an embodiment of the present invention.
The reference numerals in the drawings illustrate:
1-sample stage, 2-horizontal displacement adjusting mechanism, 3-vertical displacement adjusting mechanism, 4-supporting seat, 5-sample stage connecting piece, 6-ignition device and 7-insulating layer;
11-adjusting plate, 12-fixing plate, 13-guide rod, 14-spring and 15-sample placing groove;
111-semi-toroidal cavity; 121-guide holes, 122-protrusions;
21-horizontal guide rail, 22-horizontal guide rail limiter;
31-vertical supports, 32-vertical guide rails, 33-sliding blocks, 34-power systems, 35-synchronous belt transmission mechanisms and 36-limit buckles;
311-vertical plates, 312-cantilever arms, 313-second connecting plates, 314-slots, 315-screws;
331-a second guide slot;
351-driving wheel, 352-driven wheel, 353-transmission belt;
361-an L-shaped plate, 362-a first connecting plate;
41-first guide groove.
Detailed Description
In the following description of the present invention, unless explicitly stated or limited otherwise, the terms "disposed," "connected," and the like should be construed broadly, and may be, for example, fixedly connected or detachably connected or integrated; either direct or indirect connection, etc. The specific meaning of the above terms in the present technical solution can be understood by those skilled in the art according to specific circumstances.
In the present invention, unless otherwise indicated, terms such as "upper, lower, bottom, top" and "upper" are used to refer to the definition of the figure plane of the corresponding figure, the definition of "inner and outer" are used to refer to the definition of the figure plane of the corresponding figure, and the definition of "front and rear" are used to refer to the definition of the direction of gas flow.
The present invention is not limited to the following specific embodiments, and the respective specific technical features described in the following specific embodiments may be combined in any suitable manner without contradiction as long as they do not deviate from the idea of the present invention and should also be regarded as the disclosure of the present invention.
The embodiment of the invention discloses a solid propellant combustion surface maintaining device, as shown in fig. 1 to 3, comprising: the device comprises a sample platform 1, a horizontal displacement adjusting mechanism 2, a vertical displacement adjusting mechanism 3, a supporting seat 4, a sample platform connecting piece 5 and an ignition device 6.
Wherein the horizontal displacement adjusting mechanism 2 is used for adjusting the horizontal position of the sample stage 1. The horizontal displacement adjusting mechanism 2 of the present embodiment includes a horizontal guide rail 21 and a horizontal guide rail limiter 22, a first guide groove 41 is provided on the support base 4, the horizontal guide rail 21 is mounted in the first guide groove 41 in a matching manner, and the horizontal guide rail 21 can move back and forth along the direction of the first guide groove 41.
The horizontal rail limiter 22 is connected to the horizontal rail 21 for fixing the position of the horizontal rail 21 on the support base 4. In this embodiment, the horizontal guide rail limiter 22 is preferably an annular sleeve structure, which can improve the moving stability of the horizontal guide rail 21. The structural shape of the annular sleeve is matched with the cross section shape of the horizontal guide rail 21 and the support seat 4 after being assembled, the horizontal guide rail 21 and the support seat 4 are assembled in a matched mode and then are arranged in the annular sleeve, and the annular sleeve is fixed with the horizontal guide rail 21, and is fixed or welded through bolts. Holes are formed in the side wall of the annular sleeve, and limit screws can be inserted into the holes. After the horizontal guide rail 21 is moved to a proper position, the entire horizontal displacement adjusting mechanism 2 is fixed on the supporting seat 4 by a limit screw.
The horizontal guide rail 21 and the supporting seat 4 of this embodiment are both rectangular structures, and the two ends of the supporting seat 4 are provided with connecting portions for connecting with other fixing components.
The vertical displacement adjustment mechanism 3 is used to adjust the vertical position of the sample stage 1. As shown in fig. 4, the vertical displacement adjustment mechanism 3 of the present embodiment includes a vertical bracket 31, a vertical rail 32, a slider 33, a power system 34, and a timing belt transmission mechanism 35. Wherein the power system 34 is a stepping motor, and the rotation speed can be adjusted to achieve stepless speed change of 0-1000 r/min. The timing belt transmission mechanism 35 includes a driving pulley 351, a driven pulley 352, and a transmission belt 353. The vertical guide rail 32 is connected to the vertical support 31, the vertical support 31 and the power system 34 are both connected to the horizontal guide rail 21, the driving wheel 351 and the driven wheel 352 of the synchronous belt transmission mechanism 35 are respectively connected to the output end of the power system 34 and the vertical support 31, and the transmission belt 353 moves in the vertical direction.
Preferably, as shown in fig. 3, the vertical bracket 31 includes a vertical plate 311, a cantilever 312 and a second connection plate 313, the bottom of the vertical plate 311 is connected with the horizontal guide rail 21, the cantilever 312 is integrally connected to the top of the vertical plate 311, the second connection plate 313 is detachably mounted at the tail end of the cantilever 312, specifically, a slot 314 is arranged at the tail end of the cantilever 312, a bolt hole is penetrated through the wall of the slot 314, and the second connection plate 313 is fixed in the slot 314 by a screw 315 after being inserted into the slot 314, so that the assembly and the disassembly are convenient. The driven wheel 352 of the timing belt transmission mechanism 35 is mounted on the second connection plate 313, and the vertical rail 32 is connected to the vertical plate 311 by bolts.
The sliding block 33 is provided with a second guide groove 331, the second guide groove 331 is in a dovetail groove shape, the second guide groove 331 is matched with the vertical guide rail 32, in this embodiment, the surface roughness requirement Ra of the vertical guide rail 32 and the second guide groove 331 is less than 0.05, and the non-inductive sliding of the sliding block 33 is realized. The sliding block 33 is connected to the transmission belt 353, so that the movement of the transmission belt 353 drives the sliding block 33 to move up and down along the vertical guide rail 32. In this embodiment, the sliding block 33 is preferably connected to the transmission belt 353 by a limit buckle 36, and the limit buckle 36 is detachable. As shown in fig. 5, the limit buckle 36 of the present embodiment includes an L-shaped plate 361 and a first connecting plate 362, one end of the L-shaped plate 361 is bolted to the slider 33, the other end is bolted to the first connecting plate 362, and a transmission belt 353 is interposed between the L-shaped plate 361 and the first connecting plate 362. The L-shaped plate 361, on the one hand, cooperates with the first connecting plate 362 to serve as a connecting belt 353, and on the other hand, can serve as a counterweight to serve as a stabilizer for the sample stage 1, and can reduce unstable movements during movement of the sample stage 1.
In addition, the transmission belt 353 is made of organic rubber, and the flexible connection mode is adopted, so that the damage to the device caused by potential instrument limiting failure is effectively avoided while the power is stably output.
The sample platform 1 is connected with the sliding block 33 through the sample platform connecting piece 5, namely the whole sample platform 1 is connected to the sample platform connecting piece 5 in a suspending way, and the sliding block 33 moves up and down along the vertical direction to drive the sample platform 1 to move up and down. The sample platform 1 is provided with a sample placing groove 15, the size of the sample placing groove 15 is adjustable, an ignition device 6 is arranged near the sample placing groove 15 to ignite a solid propellant sample, and ignition combustion of the solid propellant is realized in a heating mode.
As shown in fig. 7, the sample stage 1 of the present embodiment includes an adjustment plate 11, a fixing plate 12, a guide bar 13, and a spring 14. The adjusting plate 11 is provided with a semi-annular cavity 111 with one side open, specifically a square cavity formed by sequentially connecting three vertical plates, and one side of the square cavity is open. The fixing plate 12 is fixedly connected to the sample stage connecting member 5 by bolts. The fixing plate 12 is provided with a guide hole 121 and a protrusion 122, the protrusion 122 is provided at a side portion of the fixing plate 12, and a width of the protrusion 122 ensures that it can be inserted into an opening of the semi-annular cavity 111. Further, the fixing plate 12 of this embodiment is a T-shaped plate, two guide holes 121 are symmetrically provided at the flange of the T-shaped plate, and the protrusion 122 is formed at the abdomen of the T-shaped plate. One end of the guide rod 13 is fixed on the adjusting plate 11 through a bolt, and the other end of the guide rod is inserted into the guide hole 121, so that the adjusting plate 11 is mounted on the fixed plate 12 in a suspended manner through the guide rod 13, and the guide rod 13 drives the adjusting plate 11 to move back and forth along the axial direction of the guide hole 121. The protrusion 122 is matched with the opening of the semi-annular cavity 111 of the regulating plate 11 so that the protrusion 122 can be inserted into the semi-annular cavity 111, and the outermost edge of the protrusion 122 and the space formed around the semi-annular cavity 111 form the sample placing groove 15. The both ends of spring 14 are connected respectively on fixed plate 12 and regulating plate 11, and when needs place the sample, pulling regulating plate 11 moves to keeping away from fixed plate 12 direction, and spring 14 is stretched, puts into the sample to be tested in sample standing groove 15, loosens regulating plate 11, and spring 14 kick-backs, presss from both sides tight sample to be tested. The sample placement groove 15 of the sample stage is adjustable in size and can be suitable for samples with different sizes. And the sample platform structure is favorable for quick installation and disassembly of propellant samples, and improves the working efficiency.
In order to miniaturize the whole apparatus, the vertical guide rail 32, the power system 34, and the timing belt transmission mechanism 35 of the present embodiment are provided on one side of the vertical support 31, and the sample stage 1 is provided on the other side of the vertical support 31, so that the vertical displacement adjustment mechanism 3 and the sample stage 1 are uniformly arranged above the horizontal guide rail 21. In order to match the arrangement positions of the above components, the sample stage connecting piece 5 of the present embodiment is configured as a multi-bending shaped plate, as shown in fig. 6, which is formed by connecting two L-shaped plates end to end through a vertical plate, integrally processing the two L-shaped plates and the vertical plate, processing bolt holes on the two L-shaped plates, and respectively bolting with the fixed plate 12 and the sliding block 33 of the sample stage 1.
The whole device is small in size, has the characteristics of miniaturization, is wide in application range, can be suitable for in-situ detection of specific combustion areas and combustion surface characteristics of solid propellants in various scenes, and the whole size of the device is 180mm by 50mm by 70mm.
As shown in fig. 7, the ignition device 6 of the present embodiment is a post provided near the sample placement groove 15, the post being symmetrically provided on both sides of the sample placement groove 15. The terminal is red copper post, and the terminal is fixed on the regulating plate 11 of sample platform 1, heats the resistance wire on the terminal through electric current and realizes the ignition. And set up insulating layer 7 on the contact surface of regulating plate 11 and terminal, insulating layer 7 material is polytetrafluoroethylene, has good insulating properties.
In addition, the binding post can be connected with a control system through a cable, the ignition process of the solid propellant is controlled through the control system, and the power system is also connected with the control system through the cable to control the rotating speed of the motor so as to control the moving speed of the sample table 1.
The invention also discloses a using method of the solid propellant combustion face maintaining device of the embodiment, which comprises the following steps:
step 1, preparing cuboid solid propellant grains, and ensuring that an upper section and a lower section are flat;
step 2, testing the burning speed data of the solid propellant grains under the test environment pressure;
step 3, fixing the whole solid propellant combustion surface maintaining device in a detection environment through a supporting seat 4, adjusting the position of the sample table 1 in the horizontal direction through a horizontal guide rail 21, and fixing the position of the horizontal guide rail 21 through a horizontal guide rail limiter 22;
step 4, pulling the adjusting plate 11 to fix the solid propellant grains in the sample placing groove 15 of the sample table 1;
and 5, setting the moving speed of the sample table 1, namely the rotating speed of the motor, so that the moving speed of the sample table 1 is equal to the burning speed of the burning surface of the sample to be detected, ensuring that the retreating process of the burning surface of the sample to be detected is compensated by the moving of the sample table 1 in real time, further ensuring the stability of the burning surface of the sample to be detected, and finishing the stable detection of the specific flame area.
Claims (9)
1. The solid propellant combustion surface maintaining device is characterized by comprising a sample table (1), a horizontal displacement adjusting mechanism (2) for adjusting the horizontal position of the sample table (1), a vertical displacement adjusting mechanism (3) for adjusting the vertical position of the sample table (1), a supporting seat (4), a sample table connecting piece (5) and an ignition device (6);
the horizontal displacement adjusting mechanism (2) comprises a horizontal guide rail (21) and a horizontal guide rail limiter (22), a first guide groove (41) is formed in the supporting seat (4), and the horizontal guide rail (21) can move back and forth along the direction of the first guide groove (41); the horizontal guide rail limiter (22) is connected with the horizontal guide rail (21), and the horizontal guide rail limiter (22) is used for fixing the position of the horizontal guide rail (21) on the supporting seat (4);
the vertical displacement adjusting mechanism (3) comprises a vertical bracket (31), a vertical guide rail (32), a sliding block (33), a power system (34) and a synchronous belt transmission mechanism (35); the vertical guide rail (32) is connected to the vertical support (31), the vertical support (31) and the power system (34) are both connected to the horizontal guide rail (21), two ends of the synchronous belt transmission mechanism (35) are respectively connected to the output end of the power system (34) and the vertical support (31), and a transmission belt (353) of the synchronous belt transmission mechanism (35) moves along the vertical direction; the sliding block (33) is provided with a second guide groove (331) matched with the vertical guide rail (32), the sliding block (33) is connected with the transmission belt (353), and the transmission belt (353) moves to drive the sliding block (33) to move up and down along the vertical guide rail (32);
the sample table (1) is connected with the sliding block (33) through the sample table connecting piece (5), a sample placing groove (15) is formed in the sample table (1), the size of the sample placing groove (15) is adjustable, and the ignition device (6) is arranged near the sample placing groove (15); the moving speed of the sample table (1) is equal to the burning speed of the burning surface of the solid propellant grains.
2. The solid propellant burning surface maintaining device according to claim 1, wherein the horizontal guide rail limiter (22) is of an annular sleeve structure, the horizontal guide rail (21) is installed in the annular sleeve after being matched with the supporting seat (4), the annular sleeve is fixed with the horizontal guide rail (21), holes for inserting limit screws are formed in the side wall of the annular sleeve, and the relative positions of the annular sleeve and the supporting seat (4) are fixed through the limit screws.
3. The solid propellant burning surface maintaining device according to claim 1, wherein the sliding block (33) is connected with the conveyor belt (353) through a limit buckle (36), the limit buckle (36) comprises an L-shaped plate (361) and a first connecting plate (362), one end of the L-shaped plate (361) is connected with the sliding block (33), the other end is connected with the first connecting plate (362) through a bolt, and the conveyor belt (353) is clamped between the L-shaped plate (361) and the first connecting plate (362).
4. The solid propellant combustion face maintaining device according to claim 1, characterized in that the vertical bracket (31) comprises a vertical plate (311), a cantilever (312) and a second connecting plate (313), wherein the bottom of the vertical plate (311) is connected with the horizontal guide rail (21), the cantilever (312) is connected to the top of the vertical plate (311), the second connecting plate (313) is connected to the tail end of the cantilever (312), and the second connecting plate (313) is connected with a driven wheel (352) of the synchronous belt transmission mechanism (35); the vertical guide rail (32) is connected to the vertical plate (311).
5. A solid propellant combustion face maintaining device as claimed in claim 1, characterized in that the second guide slot (331) is a dovetail slot.
6. The solid propellant combustion face maintenance device according to claim 1, characterized in that the sample stage (1) comprises an adjusting plate (11), a fixing plate (12), a guide rod (13) and a spring (14); the adjusting plate (11) is provided with a semi-annular cavity (111) with one side open; the fixing plate (12) is connected to the sample table connecting piece (5), a guide hole (121) and a protrusion (122) are formed in the fixing plate (12), one end of the guide rod (13) is fixed to the adjusting plate (11), the other end of the guide rod is inserted into the guide hole (121), the guide rod (13) drives the adjusting plate (11) to axially move back and forth along the guide hole (121), the protrusion (122) is matched with an opening of the semi-annular cavity (111), and the outermost edge of the protrusion (122) and the semi-annular cavity (111) surround to form the sample placing groove (15); the two ends of the spring (14) are respectively connected to the fixed plate (12) and the adjusting plate (11).
7. The solid propellant combustion face maintaining device according to claim 1 or 6, characterized in that the vertical guide rail (32), the power system (34) and the synchronous belt transmission mechanism (35) are arranged on one side of the vertical support (31), and the sample stage (1) is arranged on the other side of the vertical support (31); the sample platform connecting piece (5) is a special-shaped plate which is bent for many times, one end of the special-shaped plate is connected with the sliding block, and the other end of the special-shaped plate is connected with the sample platform (1).
8. The solid propellant burning surface maintaining device according to claim 1, characterized in that the ignition device (6) is a binding post arranged near the sample placing groove (15), the binding post is a copper post, and an insulating layer (7) is arranged on the contact surface of the binding post and the sample table (1).
9. A method of using a solid propellant combustion face maintenance device as claimed in any one of claims 1 to 8, comprising the steps of:
step 1, preparing a solid propellant grain, and ensuring that the upper section and the lower section of the grain are smooth;
step 2, testing the burning speed data of the solid propellant grains under the test environment pressure;
step 3, fixing the whole solid propellant combustion surface maintaining device in a test environment through a supporting seat (4), adjusting the position of the sample table (1) in the horizontal direction through a horizontal guide rail (21), and fixing the position of the horizontal guide rail (21) through a horizontal guide rail limiter (22);
step 4, fixing the solid propellant grains in a sample placing groove (15) of the sample table (1);
and 5, setting the moving speed of the sample stage (1) so that the moving speed of the sample stage (1) is equal to the burning speed of the burning surface of the solid propellant grains.
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