CN210571743U - Propellant unidirectional tensile test device - Google Patents
Propellant unidirectional tensile test device Download PDFInfo
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- CN210571743U CN210571743U CN201921431845.0U CN201921431845U CN210571743U CN 210571743 U CN210571743 U CN 210571743U CN 201921431845 U CN201921431845 U CN 201921431845U CN 210571743 U CN210571743 U CN 210571743U
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Abstract
The utility model discloses a propellant unidirectional tension test device, including the chassis, it is square frame construction, and one side fixed mounting has decides the board, and the inside movable plate that is equipped with of chassis decides board and movable plate parallel arrangement, and decides all to be equipped with the heavy platform in location that is used for placing the sample that awaits measuring on board and the movable plate, and drive screw one end is installed and is kept away from deciding board one side at the movable plate, keeps away from and installs the swivel nut on the chassis of deciding board one side, and the drive screw other end passes the swivel nut back and connects the rocking arm. The device is adopted to carry out the unidirectional tensile test, each group of samples can reach the expected strain value, the tensile retentivity of the samples after being stretched is reliable, the measurement is simple, the disassembly is convenient, and the service life-prolonging strain performance of the propellant can be conveniently determined.
Description
Technical Field
The utility model belongs to the technical field of rocket engine propellant, concretely relates to propellant unidirectional tension test device.
Background
In order to verify whether the mechanical property of the solid rocket engine propellant meets the use requirement after being stored for a certain period of time, the propellant needs to be subjected to a strain aging test, the propellant is usually prefabricated into a dumbbell-shaped sample block, and a unidirectional propellant tensile test is carried out according to the test requirement of QJ924-85 so as to determine the service life strain property of the propellant.
Adopt anchor clamps to press from both sides tight back to the sample during the experiment at present, utilize the flange bolt to stretch, current anchor clamps only can satisfy a propellant sample piece test, and tensile unstable, the assembly is dismantled difficultly, can't be suitable for group's sample tensile test.
Disclosure of Invention
The utility model provides a propellant unidirectional tension test device can make every group sample all reach anticipated strain value, and tensile back sample tensile retentivity is reliable, measures simply, convenient dismantlement.
The technical scheme adopted by the utility model is that the propellant unidirectional tensile test device comprises a bottom frame which is of a square frame structure, a fixed plate is fixedly arranged on one side of the bottom frame, a movable plate is arranged in the bottom frame, the fixed plate and the movable plate are arranged in parallel, positioning sinking platforms for placing test samples to be tested are arranged on the fixed plate and the movable plate, one end of a transmission screw rod is arranged on one side of the movable plate away from the fixed plate, a threaded sleeve is arranged on the bottom frame on one side away from the fixed plate, and the other end of the transmission screw rod is connected with a rocker arm after passing through the threaded; the underframe is provided with at least one group of guide rods, two ends of each guide rod are arranged on two sides of the underframe, and the middle part of each guide rod vertically penetrates through the fixed plate and the movable plate; and a connecting plate is arranged above the movable plate and the fixed plate.
Furthermore, the guide rods are arranged into two groups, the transmission screw rods are connected with the middle of the movable plate, and the guide rods are located on two sides of the transmission screw rods.
Further, all through bolted connection between connecting plate and the fixed plate and the movable plate, correspond on connecting plate and the fixed plate and be provided with the circular port, correspond on connecting plate and the movable plate and set up the bar hole.
Furthermore, the device is also provided with a positioning assembly which comprises a positioning screw rod and a positioning threaded sleeve, wherein the positioning screw rod is arranged on two sides of the transmission screw rod, and the positioning sleeve is arranged on the bottom frame.
Furthermore, the inner sides of the two ends of the underframe are provided with sliding grooves, and the two ends of the movable plate are respectively installed in the sliding grooves at the two ends of the underframe.
Furthermore, scales are arranged above the two end frames of the bottom frame.
The utility model discloses following beneficial effect has:
1. through the installation of movable plate and fixed plate and the setting of the heavy platform of location, can install the multiunit sample piece that awaits measuring simultaneously between fixed plate and movable plate, can realize accurate location moreover.
2. The positioning step is designed on the underframe and is positioned between the fixed plate and the movable plate, the fixed plate can be positioned, the guide of the movable plate can be determined by the arrangement of the guide rod, and meanwhile, the rocker arm and the transmission screw are installed, so that the positioning, clamping and stretching operations can be simultaneously completed by the device.
3. The top sets up the connecting plate between fixed plate and the movable plate, can ensure the stability of sample in the test process, can in time observe tensile distance and reading at chassis both ends installation scale, adopts locating component restriction every tensile strain value of group, and fine control is tensile unstable, tensile assembly dismantles difficult, fix a position scheduling problem in batches.
4. The utility model discloses owing to utilize the guide bar, solved tensile quick location, the inhomogeneous problem of tensile force, reach can be quick, accurate for storing the purpose that propellant life-prolonging technological property provided the data foundation.
Drawings
Fig. 1 is a schematic structural diagram of the device of the present invention.
Fig. 2 is a schematic view of the decomposition effect of the device of the present invention.
Fig. 3 is a top view of the device.
Fig. 4 is a front view of the device.
Fig. 5 is an AA-side view of fig. 4.
Fig. 6 is a schematic structural view of the chassis.
Fig. 7 is a top view of the stationary plate.
Fig. 8 is a plan view of the movable plate.
Fig. 9 is a top view of the connection plate.
Detailed Description
The invention is further described with reference to the following examples, but the scope of the invention as claimed is not limited to the scope of the examples.
As shown in fig. 1-9, a propellant unidirectional tensile test device comprises an underframe 1 which is of a square frame structure, a fixed plate 2 is fixedly installed on one side of the underframe 1, a movable plate 3 is arranged inside the underframe 1, the fixed plate 2 and the movable plate 3 are arranged in parallel, positioning sinking platforms 4 for placing test sample blocks 12 to be tested are arranged on the fixed plate 2 and the movable plate 3, one end of a transmission screw 5 is installed on one side of the movable plate far away from the fixed plate, a threaded sleeve 6 is installed on the underframe 1 on one side far away from the fixed plate, and the other end of the transmission screw 5 penetrates through the threaded sleeve and then is connected with a rocker; at least one group of guide rods 8 are arranged on the underframe 1, two ends of each guide rod 8 are arranged at two sides of the underframe 1, and the middle part of each guide rod 8 vertically penetrates through the fixed plate and the movable plate. Through the arrangement of the guide rod, the movable plate can move linearly without deviation; and a connecting plate 9 is arranged above the movable plate and the fixed plate. The connecting plate is mainly used for keeping the stretched shape of the sample plate to be tested, and is convenient for testing the performance of the sample.
Furthermore, the guide rods 8 are arranged in two groups, the transmission screw 5 is connected with the middle of the movable plate, and the guide rods 8 are positioned on two sides of the transmission screw 5. The guide rod is arranged, so that the problem that sample blocks are stressed unevenly in the stretching process is solved, and the test error of each group of sample blocks is reduced.
Further, all through bolted connection between connecting plate and the fixed plate and the movable plate, correspond on connecting plate and the fixed plate and be provided with the circular port, correspond on connecting plate and the movable plate and set up the bar hole.
Further, the device is also provided with a positioning assembly 10 which comprises a positioning screw rod and a positioning threaded sleeve, wherein the positioning screw rod is arranged on two sides of the transmission screw rod 5, and the positioning sleeve is arranged on the underframe. When the movable plate reaches the expected position, the movable plate is positioned by the positioning screw rod to prevent movement.
Furthermore, sliding grooves are formed in the inner sides of the two ends of the underframe 1, and the two ends of the movable plate are respectively installed in the sliding grooves of the two ends of the underframe. The sliding groove provides a fixed track for the movement of the movable plate.
Furthermore, a graduated scale 11 is arranged above the two end frames of the bottom frame 1.
The method for testing the life-prolonging strain performance of the propellant by adopting the device comprises the following steps:
1) adjusting the distance between the movable plate and the fixed plate, and mounting a prefabricated sample block to be tested on the positioning sinking platform;
2) mounting the connecting plate above the fixed plate and the movable plate;
3) rotating the rocker arm, moving the movable plate to stretch the sample block to be tested to the required value;
4) and locking the sample block to be tested, the movable plate and the fixed plate through the connecting plate, and conveying the sample block to be tested, the movable plate and the fixed plate to a tensile testing machine for performance detection.
Further, in step 3), the sample block to be tested is stretched by 5%, 10% or 25% by moving the movable plate.
At present, the device is already applied, and good effect is achieved. The test of more than 2000 samples of the solid rocket engine propellant stored for 3 years, 5 years and 8 years is finished accumulatively, and each set of test of the original test method needs to be provided with one set of tensile test bracket, compared with the original test method, the device can complete all tensile tests by 1 set of tensile test bracket, the processing cost of each set of bracket is 600 yuan, and 120 ten thousand yuan is expected to be saved. The device well control is tensile unstable, tensile assembly dismantles difficult, location scheduling problem in batches. The deviation of the test of the multiple groups is less than 1%.
Claims (6)
1. The propellant unidirectional tensile test device is characterized by comprising an underframe (1) which is of a square frame structure, wherein a fixed plate (2) is fixedly mounted on one side of the underframe, a movable plate (3) is arranged in the underframe (1), the fixed plate (2) and the movable plate (3) are arranged in parallel, positioning sinking platforms (4) for placing test samples to be tested are arranged on the fixed plate (2) and the movable plate (3), one end of a transmission screw (5) is mounted on one side, away from the fixed plate, of the movable plate, a threaded sleeve (6) is mounted on the underframe (1) on one side, away from the fixed plate, of the movable plate, and the other end of the transmission screw (5) is connected with a rocker arm (7; at least one group of guide rods (8) are arranged on the underframe (1), two ends of each guide rod (8) are arranged on two sides of the underframe (1), and the middle part of each guide rod vertically penetrates through the fixed plate and the movable plate; and a connecting plate (9) is arranged above the movable plate and the fixed plate.
2. The propellant uniaxial tension test device of claim 1, wherein: the guide rods (8) are arranged into two groups, the transmission screw rods (5) are connected with the middle of the movable plate, and the guide rods (8) are located on two sides of the transmission screw rods (5).
3. The propellant uniaxial tension test device of claim 1, wherein: all through bolted connection between connecting plate and the fixed plate and the movable plate, correspond on connecting plate and the fixed plate and be provided with the circular port, correspond on connecting plate and the movable plate and set up the bar hole.
4. The propellant uniaxial tension test device of claim 1, wherein: the device is also provided with a positioning assembly (10) which comprises a positioning screw rod and a positioning threaded sleeve, wherein the positioning screw rod is arranged on two sides of the transmission screw rod (5), and the positioning sleeve is arranged on the bottom frame.
5. The propellant uniaxial tension test device of claim 1, wherein: the inner sides of two ends of the underframe (1) are provided with sliding grooves, and two ends of the movable plate are respectively arranged in the sliding grooves at two ends of the underframe.
6. The propellant uniaxial tension test device according to any one of claims 1-5, wherein: and graduated scales (11) are arranged above the two end frames of the bottom frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921431845.0U CN210571743U (en) | 2019-08-30 | 2019-08-30 | Propellant unidirectional tensile test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921431845.0U CN210571743U (en) | 2019-08-30 | 2019-08-30 | Propellant unidirectional tensile test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210571743U true CN210571743U (en) | 2020-05-19 |
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ID=70638372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921431845.0U Active CN210571743U (en) | 2019-08-30 | 2019-08-30 | Propellant unidirectional tensile test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210571743U (en) |
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2019
- 2019-08-30 CN CN201921431845.0U patent/CN210571743U/en active Active
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