CN215931495U - Loading device for dynamic double-shaft compression of solid propellant - Google Patents

Loading device for dynamic double-shaft compression of solid propellant Download PDF

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Publication number
CN215931495U
CN215931495U CN202121458057.8U CN202121458057U CN215931495U CN 215931495 U CN215931495 U CN 215931495U CN 202121458057 U CN202121458057 U CN 202121458057U CN 215931495 U CN215931495 U CN 215931495U
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loading
loading arm
arm
hole
guide
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强洪夫
耿挺京
王哲君
王学仁
王广
岳春国
王祺洲
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Rocket Force University of Engineering of PLA
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Rocket Force University of Engineering of PLA
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Abstract

The utility model relates to the technical field of material mechanical property test, in particular to a loading device for dynamic double-shaft compression of a solid propellant, which comprises an upper clamp and a lower clamp which are connected in a matching manner, wherein the upper clamp comprises an upper clamp body and an upper loading platform, and a disc-shaped upper pressure plate is fixedly connected to the upper loading platform; the lower clamp comprises a lower clamp body and a lower loading platform, and a bottom fixing sleeve seat is fixedly connected to the lower loading platform; the upper clamp body and the lower clamp body are buckled with each other, and the area between the upper clamp body and the lower clamp body is a clamping area; the clamp designed by the utility model canThe loading ratio of 1:1 can be realized on a high-strain-rate hydraulic servo testing machine, and the strain rate covers 1-100S‑1Dynamic loading equibiaxial compression loading test. The suspension structure formed by the double-hole thread locking device and the thin rope enables the clamp to be in micro-contact with the surface of the test piece, so that direct operation on the test piece is avoided, and prestress and damage caused by dead weight of the fixed test piece and the clamp are reduced.

Description

Loading device for dynamic double-shaft compression of solid propellant
Technical Field
The utility model relates to the technical field of material mechanical property test, in particular to a loading device for dynamic double-shaft compression of a solid propellant.
Background
At present, the test method related to the mechanical property test standard of the solid propellant material mainly comprises a quasi-static uniaxial tension and compression test method with a mature test system, and an effective test method aiming at the mechanical property test of the solid propellant under dynamic biaxial compression loading is still lacked. However, the mechanical properties of the solid propellant are obviously influenced by the strain rate change factors, the stress state factors have obvious effects, and the uniaxial mechanical properties and the biaxial mechanical properties have obvious differences. Therefore, in order to accurately grasp the mechanical property of the propellant under dynamic biaxial compression loading and ensure that the application requirements under actual working conditions are met, corresponding test method research needs to be developed.
Due to the complexity of the mechanical property of the solid propellant material and the limitation of the equipment testing principle, the Split Hopkinson Pressure Bar (SHPB) device cannot directly and effectively perform the mechanical property test of the solid propellant under the biaxial dynamic loading. In addition, due to the limitation of the loading rate, the conventional biaxial mechanical property testing machine cannot directly perform the mechanical property test under dynamic loading. Therefore, a test method for testing the mechanical property of the solid propellant under dynamic biaxial compression loading is still lacked, and a new test means must be designed to carry out corresponding research. In comparison, the maximum compression speed of an INSTRON160/100-20 uniaxial high-strain-rate hydraulic servo testing machine produced by INSTRON corporation in America can reach 20m/s, the maximum measurement force is 100kN, the compression mechanical property test of the material under the dynamic loading condition can be carried out, and the measurement precision is higher because the equipment is controlled by hydraulic pressure. However, the testing machine cannot be directly matched with a test piece to realize the biaxial mechanical property test of the material, so a new test fixture is needed to be matched with the testing machine for use in the research of the biaxial high-speed compression mechanical property of the solid propellant material.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to overcome the defects and shortcomings of the background technology and provide a novel loading device for dynamic double-shaft compression of a solid propellant.
The utility model relates to a loading device for dynamic double-shaft compression of a solid propellant, which comprises an upper clamp and a lower clamp which are connected in a matching manner, wherein the upper clamp comprises an upper clamp body and an upper loading table fixedly arranged at the top of the upper clamp body, and a disc-shaped upper pressing disc is fixedly connected onto the upper loading table;
the lower clamp comprises a lower clamp body and a lower loading platform fixedly arranged at the lower end of the lower clamp body, and a bottom fixing sleeve seat is fixedly connected onto the lower loading platform;
the clamping device comprises an upper clamp body, a lower clamp body, a clamping area and a clamping mechanism, wherein the upper clamp body and the lower clamp body are buckled with each other, the area between the upper clamp body and the lower clamp body is a clamping area, the clamping area is cuboid, and one plane of the planes of diagonals of the clamping area is parallel to a vertical plane;
a guide device is also arranged between the upper clamp body and the lower clamp body;
the two ends of the upper clamp body and the lower clamp body are respectively provided with a suspension device, each suspension device comprises a suspension fixing device and a thin rope, one end of each thin rope is fixedly connected with the suspension fixing device, and the other end of each thin rope is fixedly connected with the suspension fixing device after being wound on the same side of the upper clamp body and the lower clamp body.
Preferably, the upper clamp body comprises a first loading arm and a second loading arm which are fixedly connected, the first loading arm and the second loading arm are both plate-shaped, one end of the first loading arm is fixedly connected with one end of the second loading arm, and the first loading arm and the second loading arm are arranged vertically to each other;
the lower clamp body comprises a third loading arm and a fourth loading arm which are fixedly connected, the third loading arm and the fourth loading arm are both plate-shaped, one end of the third loading arm is fixedly connected with one end of the fourth loading arm, and the third loading arm and the fourth loading arm are arranged vertically to each other;
a cross through groove is formed in the middle of each of the second loading arm and the third loading arm, loading plates are arranged in the middle of each of the first loading arm and the fourth loading arm, the loading plates on the first loading arm and the cross through grooves on the third loading arm are matched and crossed to be connected, and the cross through grooves on the second loading arm and the loading plates on the fourth loading arm are matched and crossed to be connected;
the first loading arm, the third loading arm, the second loading arm and the fourth loading arm are further connected through auxiliary guide structures respectively.
Preferably, the auxiliary guide structure comprises a strip-shaped through hole chute, the first loading arm, the second loading arm, the third loading arm and the fourth loading arm are all provided with through hole chutes, the through hole chutes on the first loading arm and the fourth loading arm are arranged at two sides of the loading plate on the loading arm, and the through hole chutes on the second loading arm and the third loading arm are arranged at two sides of the loading arm which is crossed and penetrated through the hole;
the through hole chutes on the same loading arm extend out along one end of the loading arm far away from the clamping area, and the loading arm positioned on one side of the through hole chute far away from the crossed through hole or the loading plate is a loading branch arm; the loading sub-arms cross and penetrate through corresponding through-hole chutes on the connected loading arms;
the through hole chutes on the same side of the loading plate on the first loading arm are arranged to be one, the through hole chutes on the same side of the crossed through hole on the second loading arm and the third loading arm are arranged to be one, and the through hole chutes on the same side of the loading plate on the fourth loading arm are arranged to be two.
Preferably, the guide device comprises a guide frame and two guide rods, and guide holes for the guide rods to pass through are respectively formed in two ends of the upper loading platform;
the two guide rods are vertically arranged, one end of each guide rod is fixedly connected with one side edge of the guide frame, the side edge is the bottom edge of the guide frame, the other end of each guide rod penetrates through a guide hole in the upper loading platform and then is fixedly connected with the other side edge corresponding to the bottom edge of the guide frame, the side edge is the top edge of the guide frame, the bottom edge of the guide frame is fixedly connected with the lower loading platform, and the guide rods are connected with the upper loading platform through linear bearings;
and a channel for the upper loading platform to move up and down is arranged at the top edge of the guide frame between the two guide rods, and the upper loading platform is arranged in the channel.
Preferably, the device further comprises two loading guide plates, namely a first loading guide plate and a second loading guide plate, wherein the first loading guide plate and the second loading guide plate are arranged in parallel;
the second loading arm is provided with a first loading guide hole, the first loading guide hole is communicated with the crossed penetrating groove on the loading arm, and one end of the first loading guide plate penetrates through the first loading guide hole on the second loading arm and abuts against the loading plate on the fourth loading arm;
a second loading guide hole is formed in the third loading arm, the second loading guide hole is communicated with the crossed penetrating groove in the loading arm, and one end of a second loading guide plate penetrates through the second loading guide hole in the third loading arm and abuts against the loading plate in the first loading arm;
the first loading guide plate is perpendicular to the loading plate on the fourth loading arm, and the second loading guide plate is perpendicular to the loading plate on the first loading arm;
the clamping area is an area defined by the two loading plates and the two loading guide plates.
Preferably, one surface of the first loading guide plate facing the clamping area is flush with one surface of the second loading arm facing the clamping area;
one surface of the second loading guide plate facing the clamping area is flush with one surface of the third loading arm facing the clamping area.
Preferably, the first loading guide plate is slidably connected to the first loading guide hole, and the second loading guide plate is slidably connected to the second loading guide hole.
Preferably, the lower loading table is a lower loading table with an I-shaped cross section, the bottom fixing sleeve seat is in a circular truncated cone shape, an I-shaped blind hole matched with the lower loading table is formed in the bottom fixing sleeve seat, one end of the lower loading table is fixedly connected with the joint of the third loading arm and the fourth loading arm, the other end of the lower loading table extends into the I-shaped blind hole, and the bottom fixing sleeve seat is fixedly connected with the lower loading table through a threaded hole formed in the peripheral surface of the bottom fixing sleeve seat and a bolt connected in the threaded hole in a matched mode;
the bottom fixing sleeve base is provided with a plurality of fixing threaded holes used for being connected with the tester base, and the fixing threaded holes are circumferentially and uniformly distributed along the bottom fixing sleeve base.
Preferably, the hanging fixture is a two-hole wire locker.
A loading method for dynamic double-shaft compression of a solid propellant is loaded by using a loading device for dynamic double-shaft compression of the solid propellant, and comprises the following steps:
step 1, fixedly connecting a bottom fixing sleeve base with a tester base through four high-strength screws matched with fixing threaded holes to ensure that the bottom fixing sleeve base and the tester base are completely fixed;
step 2, inserting one end of the lower loading platform, which is far away from the lower clamp body, into an I-shaped blind hole in the bottom fixing sleeve seat, extending into a threaded hole in the peripheral surface of the bottom fixing sleeve seat by using a high-strength screw and fixing the lower loading platform, ensuring that the lower clamp body is fixedly matched with the bottom fixing sleeve seat, respectively winding the two ends of the upper clamp body and the lower clamp body by using thin wires, and connecting the two ends of the same thin wire by using a suspension fixing device;
step 3, connecting the upper clamp and the lower clamp in a matched manner, enabling the upper clamp body and the lower clamp body to be in mutual centering by utilizing a guide rod to penetrate through a guide hole, and then uniformly coating friction-reducing drag reducers on the first loading guide plate, the second loading guide plate, the first loading arm, the second loading arm, the third loading arm, the fourth loading arm, loading arms on the loading arms and through hole chutes;
step 4, placing the metal checking sample into a clamping area, then pre-tightening the thin rope by using a suspension fixing device until a first loading guide plate penetrating through a first loading guide hole is in micro-contact with the surface of the sample so as to avoid the material from being damaged in advance by the gravity of an upper clamp, and locking the thin rope by using a double-hole wire locking device;
step 5, moving the first loading guide plate, taking out the metal sample, putting the square sample of the solid propellant to be tested into the metal test sample, wherein the size of the square sample is the same as that of the metal test sample, and resetting the first loading guide plate;
step 6, starting the testing machine, and reserving acceleration displacement for enabling the testing machine to reach a specified loading rate to realize constant strain rate loading;
step 7, setting loading rates according to different test conditions, and carrying out biaxial compression test under dynamic loading, wherein the strain rate range of the test is 1-100S-1Measuring strain or deformation by a sensor, outputting a force-displacement curve, and obtaining a real stress-strain curve in the stress state by the following formula;
Figure BDA0003139407670000041
Figure BDA0003139407670000042
wherein F is the loading force acting on the clamp; sigmatrueIs true stress; epsilontrueIs true strain; u is the displacement of the clamp in the vertical direction; l is0And W0The original length and width of the test piece, respectively.
The dynamic biaxial loading compression mechanical test device is simple in structure, convenient to use, low in cost and suitable for a dynamic biaxial loading compression mechanical test of a high strain rate material testing machine.
The clamp designed by the utility model can realize the loading ratio of 1:1 and the strain rate range of 1-100S on an INSTRON160/100-20 high-strain-rate hydraulic servo testing machine-1Biaxial compression loading test of solid propellant。
The clamp is matched with the test piece in configuration, the test piece is placed in the clamping area, the clamp is in micro contact with the surface of the test piece through the suspension device, direct operation on the test piece is avoided, and prestress and damage caused by dead weight of the fixed test piece and the clamp are reduced; the guide device and the loading guide plate designed by the utility model can reduce the influence of friction force on the test result as much as possible; the device designed by the utility model has uniform load distribution, enough double-shaft compression loading precision, high universality and the capability of realizing the maximum bearing load of 100KN, and can provide reference for a mechanical property test of a non-metallic material with higher strength.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic structural diagram of an upper clamp of the present invention.
Fig. 4 is a top view of fig. 3.
FIG. 5 is a schematic view of the bottom fixing socket of the present invention.
Fig. 6 is a top view of fig. 5.
Reference numerals: 1-upper pressing disc, 2-upper loading platform, 3-guide rod, 4-fourth loading arm, 5-second loading arm, 6-lower loading platform, 7-first loading guide plate, 8-first loading arm, 9-third loading arm, 10-through hole chute, 11-clamping area, 12-second loading guide plate, 13-bottom fixed sleeve seat, 14-guide frame, 15-linear bearing, 16-first loading guide hole and 17-guide hole.
Detailed Description
The utility model relates to a loading device for dynamic double-shaft compression of a solid propellant, which comprises an upper clamp and a lower clamp which are connected in a matching manner, wherein the upper clamp comprises an upper clamp body and an upper loading table 2 fixedly arranged at the top of the upper clamp body, and a disc-shaped upper pressing disc 1 is fixedly connected to the upper loading table 2;
the lower clamp comprises a lower clamp body and a lower loading table 6 fixedly arranged at the lower end of the lower clamp body, and a bottom fixing sleeve seat 13 is fixedly connected to the lower loading table 6;
the upper clamp body and the lower clamp body are buckled with each other, the area between the upper clamp body and the lower clamp body is a clamping area 11, the clamping area 11 is cuboid, and one of the planes of the diagonal lines of the clamping area 11 is parallel to the vertical plane; a guide device is also arranged between the upper clamp body and the lower clamp body;
the two ends of the upper clamp body and the lower clamp body are respectively provided with a suspension device, each suspension device comprises a suspension fixing device and a thin rope, one end of each thin rope is fixedly connected with the suspension fixing device, and the other end of each thin rope is fixedly connected with the suspension fixing device after being wound on the same side of the upper clamp body and the lower clamp body.
Preferably, the upper clamp body comprises a first loading arm 8 and a second loading arm 5 which are fixedly connected, the first loading arm 8 and the second loading arm 5 are both plate-shaped, one end of the first loading arm 8 is fixedly connected with one end of the second loading arm 5, and the first loading arm 8 and the second loading arm 5 are arranged vertically to each other;
the lower clamp body comprises a third loading arm 9 and a fourth loading arm 4 which are fixedly connected, the third loading arm 9 and the fourth loading arm 4 are both plate-shaped, one end of the third loading arm 9 is fixedly connected with one end of the fourth loading arm 4, and the third loading arm 9 and the fourth loading arm 4 are arranged vertically to each other;
a cross through groove is formed in the middle of each of the second loading arm 5 and the third loading arm 9, loading plates are arranged in the middle of each of the first loading arm 8 and the fourth loading arm 4, the loading plates on the first loading arm 8 and the cross through groove on the third loading arm 9 are in matched cross connection, and the cross through groove on the second loading arm 5 and the loading plate on the fourth loading arm 4 are in matched cross connection;
the first loading arm 8 and the third loading arm 9, and the second loading arm 5 and the fourth loading arm 4 are further connected through auxiliary guide structures respectively.
The auxiliary guide structure comprises a strip-shaped through hole chute 10, the first loading arm 8, the second loading arm 5, the third loading arm 9 and the fourth loading arm 4 are all provided with the through hole chutes 10, the through hole chutes 10 on the first loading arm 8 and the fourth loading arm 4 are arranged on two sides of a loading plate on the loading arm, and the through hole chutes 10 on the second loading arm 5 and the third loading arm 9 are arranged on two sides of a crossed hole on the loading arm;
through hole chutes 10 on the same loading arm extend out along one end of the loading arm far away from the clamping area 11, and the loading arm positioned on one side of the through hole chute 10 far away from the crossed through hole or the loading plate is a loading branch arm; the loading sub-arms cross and penetrate through corresponding through-hole chutes 10 on the connected loading arms;
one through-hole chute 10 is provided on the first loading arm 8 on the same side of the loading plate, one through-hole chute 10 is provided on the second loading arm 5 and the third loading arm 9 on the same side of the cross-passing hole, and two through-hole chutes 10 are provided on the fourth loading arm 4 on the same side of the loading plate.
The guide device comprises a guide frame 14 and two guide rods 3, and guide holes 17 for the guide rods 3 to pass through are respectively arranged at two ends of the upper loading platform 2;
the two guide rods 3 are vertically arranged, one end of each guide rod 3 is fixedly connected with one side edge of the guide frame 14, the side edge is the bottom edge of the guide frame 14, the other end of each guide rod 3 penetrates through a guide hole 17 in the upper loading platform 2 and then is fixedly connected with the other side edge corresponding to the bottom edge of the guide frame 14, the side edge is the top edge of the guide frame 14, the bottom edge of the guide frame 14 is fixedly connected with the lower loading platform 6, and the guide rods 3 and the upper loading platform 2 are connected through linear bearings 15;
the top edge of the guide frame 14 between the two guide rods 3 is provided with a channel for the upper loading platform 2 to move up and down, and the upper loading platform 2 is arranged in the channel.
The device also comprises two loading guide plates, namely a first loading guide plate 7 and a second loading guide plate 12, wherein the first loading guide plate 7 and the second loading guide plate 12 are arranged in parallel;
a first loading guide hole 16 is formed in the second loading arm 5, the first loading guide hole 16 is communicated with a crossed through groove in the loading arm, and one end of the first loading guide plate 7 penetrates through the first loading guide hole 16 in the second loading arm 5 and abuts against a loading plate on the fourth loading arm 4;
a second loading guide hole 17 is formed in the third loading arm 9, the second loading guide hole 17 is communicated with the crossed through groove in the loading arm, and one end of the second loading guide plate 12 penetrates through the second loading guide hole 17 in the third loading arm 9 and abuts against the loading plate in the first loading arm 8;
the first loading guide plate 7 is vertically arranged with the loading plate on the fourth loading arm 4, and the second loading guide plate 12 is vertically arranged with the loading plate on the first loading arm 8;
the clamping area 11 is an area defined by two loading plates and two loading guide plates, and the widths of the first loading guide plate 7 and the second loading guide plate 12 are set as required, so that the clamping area 11 is square.
One surface of the first loading guide plate 7 facing the clamping area 11 is flush with one surface of the second loading arm 5 facing the clamping area 11;
one surface of the second loading guide plate 12 facing the clamping area 11 is flush with one surface of the third loading arm 9 facing the clamping area 11.
The first loading guide plate 7 is slidably connected to the first loading guide hole 16, and the second loading guide plate 12 is slidably connected to the second loading guide hole 17.
The lower loading table 6 is a lower loading table 6 with an I-shaped cross section, the bottom fixing sleeve seat 13 is in a circular truncated cone shape, an I-shaped blind hole matched with the lower loading table 6 is formed in the bottom fixing sleeve seat 13, one end of the lower loading table 6 is fixedly connected with the joint of the third loading arm 9 and the fourth loading arm 4, the other end of the lower loading table extends into the I-shaped blind hole, and the bottom fixing sleeve seat 13 is fixedly connected with the lower loading table 6 through threaded holes formed in the peripheral surface of the bottom fixing sleeve seat 13 and bolts connected into the threaded holes in a matched mode;
the fixed cover seat 13 in bottom is provided with a plurality of fixed screw holes that are used for connecting the tester base, fixed screw hole is along the fixed cover seat 13 circumference equipartition in bottom.
The hanging and fixing device is a double-hole thread locking device.
A loading method for dynamic double-shaft compression of a solid propellant is loaded by using a loading device for dynamic double-shaft compression of the solid propellant, and comprises the following steps:
step 1, fixedly connecting a bottom fixing sleeve base 13 with a tester base through four high-strength screws matched with fixing threaded holes to ensure that the bottom fixing sleeve base 13 is completely fixed with the tester base;
step 2, inserting one end of the lower loading platform 6, which is far away from the lower clamp body, into an I-shaped blind hole in the bottom fixing sleeve seat 13, extending into a threaded hole in the peripheral surface of the bottom fixing sleeve seat 13 by using a high-strength screw and fixing the lower loading platform 6, ensuring that the lower clamp body is fixedly matched with the bottom fixing sleeve seat 13, respectively winding the two ends of the upper clamp body and the lower clamp body by using thin wires, and connecting the two ends of the same thin wire by using a hanging fixing device;
step 3, connecting the upper clamp and the lower clamp in a matching manner, enabling the upper clamp body and the lower clamp body to be centered with each other by enabling the guide rod 3 to penetrate through the guide hole 17, and then uniformly coating friction-reducing drag reducers on the first loading guide plate 7, the second loading guide plate 12, the first loading arm 8, the second loading arm 5, the third loading arm 9, the fourth loading arm 4, loading arms on the loading arms and the through hole sliding grooves 10;
step 4, placing the metal checking sample into the clamping area 11, then pre-tightening the thin rope by using a suspension fixing device until the first loading guide plate 7 penetrating through the first loading guide hole 16 is in micro contact with the surface of the sample so as to avoid the material from being damaged in advance by the gravity of the upper clamp, and at the moment, locking the thin rope by using a double-hole wire locking device;
step 5, moving the first loading guide plate 7, taking out the metal sample, putting the square sample of the solid propellant to be tested into the metal test sample, wherein the size of the square sample is the same as that of the metal test sample, and resetting the first loading guide plate 7;
step 6, starting the testing machine, and reserving acceleration displacement for enabling the testing machine to reach a specified loading rate to realize constant strain rate loading;
step 7, setting loading rates according to different test conditions, and carrying out biaxial compression test under dynamic loading, wherein the strain rate range of the test is 1-100S-1Measuring the strain or deformation by a sensor, outputting a force-displacement curve, and obtaining the strain or deformation by the following formulaTrue stress-strain curves under stress conditions;
Figure BDA0003139407670000081
Figure BDA0003139407670000082
wherein F is the loading force acting on the clamp; sigmatrueIs true stress; epsilontrueIs true strain; u is the displacement of the clamp in the vertical direction; l is0And W0The original length and width of the test piece, respectively.
The utility model has simple structure, convenient use and low cost, and is suitable for the biaxial dynamic loading compression mechanical test of the high strain rate material testing machine.
The clamp designed by the utility model can realize the loading ratio of 1:1 and the strain rate of 1-100S on an INSTRON160/100-20 high-strain-rate hydraulic servo testing machine-1Dynamic loading equal biaxial compression loading test.
The clamp is designed to be matched with the configuration of a test piece, the test piece is placed in an area formed by the clamp, the clamp is in micro contact with the surface of the test piece through a suspension structure consisting of the double-hole wire locking device and the thin rope, direct operation on the test piece is avoided, and prestress and damage caused by dead weight of the fixed test piece and the clamp are reduced;
the guide device and the loading guide plate designed by the utility model can reduce the influence of friction force on the test result as much as possible;
the device designed by the utility model has uniform load distribution and enough double-shaft compression loading precision.

Claims (9)

1. A loading device for dynamic double-shaft compression of a solid propellant comprises an upper clamp and a lower clamp which are connected in a matching manner, and is characterized in that the upper clamp comprises an upper clamp body and an upper loading table (2) fixedly arranged at the top of the upper clamp body, and a disc-shaped upper pressing disc (1) is fixedly connected onto the upper loading table (2);
the lower clamp comprises a lower clamp body and a lower loading table (6) fixedly arranged at the lower end of the lower clamp body, and a bottom fixing sleeve seat (13) is fixedly connected to the lower loading table (6);
the upper clamp body and the lower clamp body are buckled with each other, a clamping area (11) is arranged between the upper clamp body and the lower clamp body, the clamping area (11) is cuboid, and one plane of planes of diagonals of the clamping area (11) is parallel to a vertical plane;
a guide device is also arranged between the upper clamp body and the lower clamp body;
the two ends of the upper clamp body and the lower clamp body are respectively provided with a suspension device, each suspension device comprises a suspension fixing device and a thin rope, one end of each thin rope is fixedly connected with the suspension fixing device, and the other end of each thin rope is fixedly connected with the suspension fixing device after being wound on the same side of the upper clamp body and the lower clamp body.
2. The loading device for dynamic biaxial compression of the solid propellant according to claim 1, wherein the upper clamp body comprises a first loading arm (8) and a second loading arm (5) which are fixedly connected, the first loading arm (8) and the second loading arm (5) are both plate-shaped, one end of the first loading arm (8) is fixedly connected with one end of the second loading arm (5), and the first loading arm (8) and the second loading arm (5) are vertically arranged;
the lower clamp body comprises a third loading arm (9) and a fourth loading arm (4) which are fixedly connected, the third loading arm (9) and the fourth loading arm (4) are both plate-shaped, one end of the third loading arm (9) is fixedly connected with one end of the fourth loading arm (4), and the third loading arm (9) and the fourth loading arm (4) are arranged vertically to each other;
a cross through groove is formed in the middle of each of the second loading arm (5) and the third loading arm (9), loading plates are arranged in the middle of each of the first loading arm (8) and the fourth loading arm (4), the loading plates on the first loading arm (8) are matched and crossed with the cross through grooves on the third loading arm (9) to be connected, and the cross through grooves on the second loading arm (5) are matched and crossed with the loading plates on the fourth loading arm (4) to be connected;
the first loading arm (8) and the third loading arm (9), and the second loading arm (5) and the fourth loading arm (4) are further connected through auxiliary guide structures respectively.
3. The loading device for dynamic biaxial compression of the solid propellant according to claim 2, wherein the auxiliary guide structure comprises an elongated through hole chute (10), the through hole chutes (10) are arranged on the first loading arm (8), the second loading arm (5), the third loading arm (9) and the fourth loading arm (4), the through hole chutes (10) on the first loading arm (8) and the fourth loading arm (4) are arranged on two sides of the loading plate on the loading arms, and the through hole chutes (10) on the second loading arm (5) and the third loading arm (9) are arranged on two sides of the crossed through hole on the loading arms;
through hole chutes (10) on the same loading arm extend out along one end of the loading arm far away from the clamping area (11), and the loading arm positioned on one side of the through hole chute (10) far away from the crossed through hole or the loading plate is a loading branch arm; the loading sub-arms cross and penetrate through corresponding through hole sliding grooves (10) on the connected loading arms;
one through hole chute (10) is arranged on the first loading arm (8) and positioned on the same side of the loading plate, one through hole chute (10) is arranged on the second loading arm (5) and the third loading arm (9) and positioned on the same side of the crossed through hole, and two through hole chutes (10) are arranged on the fourth loading arm (4) and positioned on the same side of the loading plate.
4. A loading device for dynamic biaxial compression of a solid propellant according to claim 3, wherein the guiding device comprises a guiding frame (14) and two guiding rods (3), and two ends of the upper loading platform (2) are respectively provided with a guiding hole (17) for the guiding rod (3) to pass through;
the two guide rods (3) are vertically arranged, one end of each guide rod (3) is fixedly connected with one side edge of each guide frame (14), the side edge is the bottom edge of each guide frame (14), the other end of each guide rod (3) penetrates through a guide hole (17) in the upper loading platform (2) and then is fixedly connected with the other side edge corresponding to the bottom edge of each guide frame (14), the side edge is the top edge of each guide frame (14), the bottom edge of each guide frame (14) is fixedly connected with the lower loading platform (6), and the guide rods (3) are connected with the upper loading platform (2) through uniform linear bearings (15);
a channel for the upper loading platform (2) to move up and down is arranged at the top edge of the guide frame (14) positioned between the two guide rods (3), and the upper loading platform (2) is arranged in the channel.
5. A loading unit for dynamic biaxial compression of a solid propellant according to claim 4, further comprising two loading guide plates, a first loading guide plate (7) and a second loading guide plate (12), respectively, the first loading guide plate (7) and the second loading guide plate (12) being arranged in parallel with each other;
a first loading guide hole (16) is formed in the second loading arm (5), the first loading guide hole (16) is communicated with a crossed through groove in the loading arm, and one end of the first loading guide plate (7) penetrates through the first loading guide hole (16) in the second loading arm (5) and abuts against a loading plate in the fourth loading arm (4);
a second loading guide hole (17) is formed in the third loading arm (9), the second loading guide hole (17) is communicated with the crossed through groove in the loading arm, and one end of the second loading guide plate (12) penetrates through the second loading guide hole (17) in the third loading arm (9) and abuts against the loading plate in the first loading arm (8);
the first loading guide plate (7) is perpendicular to the loading plate on the fourth loading arm (4), and the second loading guide plate (12) is perpendicular to the loading plate on the first loading arm (8);
the clamping area (11) is an area formed by two loading plates and two loading guide plates in a surrounding mode.
6. A loading device for dynamic biaxial compression of a solid propellant as claimed in claim 5, wherein the side of the first loading guide plate (7) facing the clamping area (11) is flush with the side of the second loading arm (5) facing the clamping area (11);
one surface of the second loading guide plate (12) facing the clamping area (11) is flush with one surface of the third loading arm (9) facing the clamping area (11).
7. A loading unit for dynamic biaxial compression of a solid propellant according to claim 6 wherein the first loading guide plate (7) is slidably connected to the first loading guide hole (16) and the second loading guide plate (12) is slidably connected to the second loading guide hole (17).
8. The loading device for dynamic biaxial compression of the solid propellant according to claim 7, wherein the lower loading platform (6) is a lower loading platform (6) with an i-shaped cross section, the bottom fixing sleeve seat (13) is in a circular truncated cone shape, an i-shaped blind hole matched with the lower loading platform (6) is formed in the bottom fixing sleeve seat (13), one end of the lower loading platform (6) is fixedly connected with the joint of the third loading arm (9) and the fourth loading arm (4), the other end of the lower loading platform extends into the i-shaped blind hole, and the bottom fixing sleeve seat (13) is fixedly connected with the lower loading platform (6) through a threaded hole formed in the peripheral surface of the bottom fixing sleeve seat (13) and a bolt connected in the threaded hole in a matching manner;
the bottom fixing sleeve seat (13) is provided with a plurality of fixing threaded holes used for being connected with the tester base, and the fixing threaded holes are circumferentially and uniformly distributed along the bottom fixing sleeve seat (13).
9. The loading unit for dynamic biaxial compression of a solid propellant as recited in claim 8 wherein said suspension fixture is a two-hole wire locker.
CN202121458057.8U 2021-06-29 2021-06-29 Loading device for dynamic double-shaft compression of solid propellant Active CN215931495U (en)

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CN202121458057.8U CN215931495U (en) 2021-06-29 2021-06-29 Loading device for dynamic double-shaft compression of solid propellant

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Application Number Priority Date Filing Date Title
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