CN114608954A - Material fatigue performance test system under low-temperature liquid oxygen environment - Google Patents
Material fatigue performance test system under low-temperature liquid oxygen environment Download PDFInfo
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- CN114608954A CN114608954A CN202210349658.8A CN202210349658A CN114608954A CN 114608954 A CN114608954 A CN 114608954A CN 202210349658 A CN202210349658 A CN 202210349658A CN 114608954 A CN114608954 A CN 114608954A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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Abstract
The invention discloses a system for testing fatigue performance of a material in a low-temperature liquid oxygen environment, and relates to the technical field of material mechanics testing devices; the device comprises a host, wherein an environment device which is hermetically arranged is movably arranged on the host, a clamp and a deformation measurement extension system are arranged in the environment device, and the clamp and the deformation measurement extension system are used for installing a sample to be tested; the environment device is respectively connected with a vacuum system and a liquid oxygen source through pipelines. The system for testing the fatigue performance of the material in the low-temperature liquid oxygen environment can realize the test of the creep, tension and fatigue mechanical properties of the material in the liquid oxygen environment.
Description
Technical Field
The invention relates to the technical field of material mechanics test devices, in particular to a system for testing fatigue performance of a material in a low-temperature liquid oxygen environment.
Background
Liquid oxygen has a wide range of industrial and medical uses. Liquid oxygen is often produced industrially by fractionation of liquid air. The total expansion ratio of the liquid oxygen is as high as 860:1, and the advantage represents great advantage in storage and transportation. However, the spacecraft which mainly uses the liquid rocket engine and adopts liquid oxygen as a liquid propeller has complex operation conditions. The liquid oxygen storage device not only bears the characteristic of low-temperature strong oxidation of liquid oxygen, but also is easy to generate chemical reaction under the external stimulation of impact, collision, friction, static electricity and the like to cause detonation and explosion. Meanwhile, the blades of the liquid rocket engine are required to bear complex load in an oxygen-rich environment, and material performance degradation is easy to generate, so that a mechanical property sensitivity test of the material in a liquid oxygen environment is required.
At present, a performance test system for the material under the environments of high temperature, room temperature and low temperature is complete. And the mechanical property test platforms in complex environments such as liquid oxygen and the like are few, so that the performance test of the material in the liquid oxygen environment is inconvenient.
Disclosure of Invention
The invention aims to provide a system for testing the fatigue performance of a material in a low-temperature liquid oxygen environment, which is used for solving the problems in the prior art and realizing the testing of the creep, tension and fatigue mechanical properties of the material in the liquid oxygen environment.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a material fatigue performance testing system in a low-temperature liquid oxygen environment, which comprises a host, wherein an environment device which is hermetically arranged is movably arranged on the host, a clamp and a deformation measurement extension system are arranged in the environment device, and the clamp and the deformation measurement extension system are used for installing a sample to be tested; the environment device is respectively connected with a vacuum system and a liquid oxygen source through pipelines.
Optionally, the host computer includes the base, frame pillar fixedly connected with mesa is passed through at the base top, the mesa top is connected with the entablature through inside hollow stand, the activity is provided with the pulley on the entablature, the winding has the counter weight rope on the pulley, counter weight rope one end with environment device fixed connection, the counter weight rope other end with the activity set up in the inside weight fixed connection of stand, the stand adopts hollow pipe to make, install the weight within the stand, the high assurance environment device of stand should have sufficient lift space, the weight of environment device equals the weight of two weights in the host computer stand, utilizes the handle among the environment device to go up and down.
Optionally, the environment device includes a base flange disposed on the table top through a support leg, the top of the base flange is fixedly connected with a cylinder with an opening at the bottom through a screw, a sealing gasket is disposed between the base flange and the cylinder for preventing liquid oxygen from leaking during testing, and the cylinder is internally provided with the clamp and a deformation measurement extension system; the heat-insulating layer is fixedly arranged outside the cylinder body, the cylinder body is respectively provided with a liquid oxygen interface and a vacuumizing port, the liquid oxygen interface is communicated with the liquid oxygen source through a pipeline, liquid oxygen is conveyed into the cylinder body through the liquid oxygen interface in a test, and the vacuumizing port is connected with the vacuum system through a pipeline; the base flange bottom is fixedly provided with a base heat preservation layer, and the base heat preservation layer is connected with the supporting leg through mechanical interference fit.
Optionally, the fixture and deformation measurement extension system includes a pillar fixedly arranged on the base flange, the top of the pillar is fixedly connected with an upper frame, the upper frame is fixedly connected with a connecting rod through a lock nut, the base flange is provided with a flange through hole, the flange through hole is located below the connecting rod, the bottom of the flange through hole is fixedly provided with a sealing device, a pull rod penetrates through the sealing device, the pull rod can move up and down in the sealing device, the top of the pull rod penetrates through the flange through hole and then is fixedly connected with a transition rod, one side of the bottom of the pull rod is fixedly connected with a horizontally arranged extension rod, and an extension meter is connected between the extension rod and the base heat insulation layer; the sample to be tested is arranged between the connecting rod and the transition rod; and a sensor is arranged at the connecting position of the connecting rod and the lock nut.
Optionally, a table surface hole is formed in the table surface and located below the pull rod, an electric cylinder is fixedly arranged at the bottom of the table surface, a connecting shaft at the top of the electric cylinder penetrates through the table surface hole, the top of the connecting shaft can be fixedly connected with the bottom of the pull rod, and the electric cylinder is connected with an oil source through a pipeline.
Optionally, the electric cylinder is fixedly connected with the bottom of the table top through a lock column.
Optionally, the vacuum system includes a vacuum pump, the vacuum pump is communicated with the environment device through a pipeline, a vacuum environment is manufactured before the test is started, and cleanliness under a liquid oxygen environment is guaranteed.
Optionally, a handle is fixedly mounted on the outer side of the heat insulation layer, a lifting ring is mounted at the top of the heat insulation layer, and the lifting ring is fixedly connected with one end, far away from the weight, of the counterweight rope.
Compared with the prior art, the invention has the following technical effects:
the counterweight device is arranged on the host machine, and can freely slide with the environment device. The loading host machine is multifunctional testing equipment, and can realize the testing of creep, tension and fatigue mechanical properties of the material in a liquid oxygen environment. Meanwhile, the host loading system adopts a modularized electric cylinder which is designed by integrating a servo motor and a lead screw, so that high-frequency material mechanical property testing can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a mechanical property testing system for a material in a low-temperature liquid oxygen environment;
FIG. 2 is a schematic view of an environmental apparatus;
FIG. 3 is a schematic diagram of a host;
FIG. 4 is a schematic diagram of an environment device and a host;
FIG. 5 is a schematic view of a fixture and deformation measurement extension system;
description of reference numerals: 1. an environmental device; 2. a host; 3. a fixture and a deformation measurement extension system; 4. vacuum pipe connection; 5. a vacuum pump; 6. a liquid oxygen source; 7. a pipeline; 8. an extensometer; 9. a hoisting ring; 10. a heat-insulating layer; 11. a barrel; 12. a handle; 13. a base flange; 14. a base insulating layer; 15. a support leg; 16. a counterweight rope; 17. a pulley; 18. an upper cross beam; 19. a weight; 20. a column; 21. a table top; 22. locking the nut; 23. an electric cylinder; 24. a frame strut; 25. a source of oil; 26. a base; 27. a connecting shaft; 28. a sensor; 29. a connecting rod; 30. a sample to be tested; 31. a transition lever; 32. a pull rod; 33. a sealing device; 34. an upper frame; 35. a pillar; 36. a stretching rod; 37. a liquid oxygen interface; 38. and a lock cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to provide a system for testing the fatigue performance of a material in a low-temperature liquid oxygen environment, which is used for solving the problems in the prior art and can realize the testing of the creep, tension and fatigue mechanical properties of the material in the liquid oxygen environment.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a system for testing fatigue performance of a material in a low-temperature liquid oxygen environment, which is shown in a figure 1, a figure 2, a figure 3, a figure 4 and a figure 5 and comprises a host machine 2, wherein an environment device 1 which is hermetically arranged is movably arranged on the host machine 2, a clamp and a deformation measurement extension system 3 are arranged in the environment device 1, and the clamp and the deformation measurement extension system 3 are used for installing a sample 30 to be tested; the environment device 1 is respectively connected with a vacuum system and a liquid oxygen source 6 through a pipeline 7, the vacuum system comprises a vacuum pump 5, the vacuum pump 5 is communicated with the environment device 1 through a pipeline, the pipeline connected with the vacuum pump 5 is a vacuum connecting pipe 4, a vacuum environment is manufactured before the test is started, and the guarantee of cleanliness under the liquid oxygen environment is realized.
Specifically, host computer 2 includes base 26, frame pillar 24 fixedly connected with mesa 21 is passed through at base 26 top, mesa 21 top is connected with entablature 18 through inside hollow stand 20, mesa 21 is connected through lock nut 22 with stand 20, the activity is provided with pulley 17 on the entablature 18, the winding has counter weight rope 16 on the pulley 17, counter weight rope 16 one end and environment device 1 fixed connection, the counter weight rope 16 other end sets up in the inside weight 19 fixed connection of stand 20 with the activity, stand 20 adopts hollow circular tube to make, install weight 19 within stand 20, the height of stand 20 guarantees that environment device 1 should have sufficient lift space, the weight of environment device 1 equals the weight of two weights 19 in the stand 20 of host computer, utilize handle 12 in the environment device 1 to go up and down.
The environment device 1 comprises a base flange 13 arranged on a table-board 21 through a supporting leg 15, the top of the base flange 13 is fixedly connected with a cylinder 11 with an opening at the bottom through a screw, a sealing gasket is arranged between the base flange 13 and the cylinder 11 and used for ensuring that liquid oxygen is not leaked in a test, and a clamp and a deformation measurement extension system 3 are arranged in the cylinder 11; the heat preservation layer 10 is fixedly arranged outside the cylinder 11, the handle 12 is fixedly arranged outside the heat preservation layer 10, the top of the heat preservation layer 10 is provided with the hanging ring 9, the hanging ring 9 is fixedly connected with one end, away from the weight 19, of the counterweight rope 16, the cylinder 11 is respectively provided with the liquid oxygen interface 37 and the vacuumizing port, the liquid oxygen interface 37 is communicated with the liquid oxygen source 6 through the pipeline 7, the liquid oxygen source 6 can adopt a structural form that an oxygen tank is matched with a liquid oxygen pump to realize the liquid oxygen transportation, or adopts a cold head structure to realize the oxygen liquefaction, and finally the liquid oxygen is transported into the cylinder 11 through the liquid oxygen interface 37 in a test, a liquid oxygen preparation and transportation device at the liquid oxygen source 6 is the same as a traditional liquid oxygen preparation and transportation structure, so that the liquid oxygen preparation and transportation device is not limited to the two structural forms, and other structures capable of transporting the liquid oxygen into the cylinder 11 also belong to the optional scope of the invention. The vacuumizing port is connected with a vacuum system through a pipeline; the bottom of the base flange 13 is fixedly provided with a base insulating layer 14, and the base insulating layer 14 is connected with the supporting leg 15 through mechanical interference fit.
The clamp and deformation measurement extension system 3 comprises a support column 35 fixedly arranged on a base flange 13, the top of the support column 35 is fixedly connected with an upper frame 34, the upper frame 34 is fixedly connected with a connecting rod 29 through a lock nut, the lock nut is a locking nut 22, the base flange 13 is provided with a flange through hole, the flange through hole is positioned below the connecting rod 29, the bottom of the flange through hole is fixedly provided with a sealing device 33, a pull rod 32 penetrates through the sealing device 33, the pull rod 32 can move up and down in the sealing device 33, the top of the pull rod 32 penetrates through the flange through hole and then is fixedly connected with a transition rod 31, one side of the bottom of the pull rod 32 is fixedly connected with a horizontally arranged extension rod 36, and an extension meter 8 is connected between the extension rod 36 and a base heat insulation layer 14; a sample to be tested 30 is arranged between the connecting rod 29 and the transition rod 31; a sensor 28 is arranged at the connecting position of the connecting rod 29 and the lock nut. The table top 21 is provided with a table top hole, the table top hole is located below the pull rod 32, the bottom of the table top 21 is fixedly provided with an electric cylinder 23, the electric cylinder 23 is fixedly connected with the bottom of the table top 21 through a lock column 38, the top of the electric cylinder 23 is connected with a connecting shaft 27 through a speed reducer and a coupler, the connecting shaft 27 is arranged in the table top hole in a penetrating mode, the top of the connecting shaft 27 can be fixedly connected with the bottom of the pull rod 32, the electric cylinder 23 is connected with an oil source 25 through a pipeline, the oil source 25 is placed on the base 26 and used for providing a cooling system for the electric cylinder 23.
The invention can control the connecting shaft 27 to move up and down through the electric cylinder 23, thereby driving the pull rod 32 to move up and down, realizing the test processes of stretching, extruding and the like of a sample 30 to be tested, the extensometer 8 and the sensor 28 are respectively connected with the control system, the data in the test process can be transmitted to the control system in real time, the weight of the environment device 1 is equal to the weight of two weights 19 in the host column, and the lifting of the environment device 1 can be realized by utilizing the handle 12 in the environment device 1.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A material fatigue performance test system under low temperature liquid oxygen environment which characterized in that: the device comprises a host, wherein an environment device which is hermetically arranged is movably arranged on the host, a clamp and a deformation measurement extension system are arranged in the environment device, and the clamp and the deformation measurement extension system are used for installing a sample to be tested; the environment device is respectively connected with a vacuum system and a liquid oxygen source through pipelines.
2. The system for testing the fatigue performance of the material in the low-temperature liquid oxygen environment according to claim 1, wherein: the host computer includes the base, the base top is through frame pillar fixedly connected with mesa, the mesa top is connected with the entablature through inside hollow stand, the activity is provided with the pulley on the entablature, the winding has the counter weight rope on the pulley, counter weight rope one end with environment device fixed connection, the counter weight rope other end with the activity set up in the inside weight fixed connection of stand.
3. The system for testing the fatigue performance of the material in the low-temperature liquid oxygen environment according to claim 2, wherein: the environment device comprises a base flange arranged on the table board through a support leg, the top of the base flange is fixedly connected with a cylinder body with an opening at the bottom, a sealing gasket is arranged between the base flange and the cylinder body, and the clamp and a deformation measurement extension system are arranged in the cylinder body; the heat-insulating layer is fixedly arranged outside the cylinder body, the cylinder body is respectively provided with a liquid oxygen interface and a vacuum-pumping port, the liquid oxygen interface is communicated with the liquid oxygen source through a pipeline, and the vacuum-pumping port is connected with the vacuum system through a pipeline; and a base heat-insulating layer is fixedly arranged at the bottom of the base flange.
4. The system for testing the fatigue performance of the material in the low-temperature liquid oxygen environment according to claim 3, wherein: the clamp and deformation measurement extension system comprises a support fixedly arranged on a base flange, the top of the support is fixedly connected with an upper frame, the upper frame is fixedly connected with a connecting rod through a lock nut, a flange through hole is formed in the base flange and is positioned below the connecting rod, a sealing device is fixedly arranged at the bottom of the flange through hole, a pull rod penetrates through the sealing device, the top of the pull rod penetrates through the flange through hole and is fixedly connected with a transition rod, one side of the bottom of the pull rod is fixedly connected with a horizontally arranged extension rod, and an extension meter is connected between the extension rod and the base heat insulation layer; the sample to be tested is arranged between the connecting rod and the transition rod; and a sensor is arranged at the connecting position of the connecting rod and the lock nut.
5. The system for testing the fatigue performance of the material in the low-temperature liquid oxygen environment according to claim 4, wherein: the oil-gas separation table is characterized in that a table surface hole is formed in the table surface and located below the pull rod, an electric cylinder is fixedly arranged at the bottom of the table surface, a connecting shaft at the top of the electric cylinder penetrates through the table surface hole, the top of the connecting shaft can be fixedly connected with the bottom of the pull rod, and the electric cylinder is connected with an oil source through a pipeline.
6. The system for testing the fatigue performance of the material in the low-temperature liquid oxygen environment according to claim 5, wherein: the electric cylinder is fixedly connected with the bottom of the table board through a lock column.
7. The system for testing the fatigue performance of the material in the low-temperature liquid oxygen environment according to claim 1, wherein: the vacuum system comprises a vacuum pump which is communicated with the environment device through a pipeline.
8. The system for testing the fatigue performance of the material in the low-temperature liquid oxygen environment according to claim 3, wherein: the handle is fixedly mounted on the outer side of the heat preservation layer, a lifting ring is mounted at the top of the heat preservation layer, and the lifting ring is fixedly connected with one end of the counterweight far away from the counterweight rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210349658.8A CN114608954A (en) | 2022-04-02 | 2022-04-02 | Material fatigue performance test system under low-temperature liquid oxygen environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210349658.8A CN114608954A (en) | 2022-04-02 | 2022-04-02 | Material fatigue performance test system under low-temperature liquid oxygen environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114608954A true CN114608954A (en) | 2022-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210349658.8A Pending CN114608954A (en) | 2022-04-02 | 2022-04-02 | Material fatigue performance test system under low-temperature liquid oxygen environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114608954A (en) |
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2022
- 2022-04-02 CN CN202210349658.8A patent/CN114608954A/en active Pending
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