CN108344629B - Novel creep loading experimental equipment - Google Patents
Novel creep loading experimental equipment Download PDFInfo
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- CN108344629B CN108344629B CN201810155294.3A CN201810155294A CN108344629B CN 108344629 B CN108344629 B CN 108344629B CN 201810155294 A CN201810155294 A CN 201810155294A CN 108344629 B CN108344629 B CN 108344629B
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention discloses a novel creep loading experiment device which comprises a high-pressure gas source, a gas pressure stabilizer, a pressure gas storage chamber and a pressure chamber which are sequentially communicated, wherein the gas pressure stabilizer is communicated with external air through an exhaust pipe, a piston is arranged in the pressure chamber in a sliding manner, a loading head is arranged at the lower end of the piston, a through hole for the loading head to extend out is formed in the bottom of the pressure chamber, a base is arranged below the pressure chamber, the pressure chamber is fixedly connected with the base, a cushion block is arranged on the base, and the cushion block is arranged below the loading head. Compared with mechanical equipment, the pressure is kept constant by the gas pressure stabilizer, intelligent control is realized, and the precision is high; the invention realizes loading by inputting pressure gas into the pressurizing chamber, and has no impact load. Compared with electronic equipment, the invention does not need to be provided with a servo motor or a servo hydraulic press, and has lower energy consumption and lower noise; when the device works, the continuous and stable work can be realized only by maintaining the energy supply of the normal work of the gas voltage stabilizer.
Description
Technical Field
The invention relates to the technical field of loading equipment, in particular to novel creep loading experimental equipment.
Background
The creep test is a material performance test for measuring the slow plastic deformation of the material under the action of long-time constant stress. In order to carry out the test and research of the creep deformation characteristic of the material, creep loading experimental equipment is indispensable, and the creep loading experimental equipment can be divided into a mechanical type and an electronic type according to the working principle of the creep loading experimental equipment.
The mechanical type is a traditional product, the main working principle of the mechanical type is a lever principle of gradual amplification, a loading process is realized by applying weights with certain mass at the end part of a lever at the tail end, the measurement of the friction resistance at a fulcrum and the increase of the impact load brought by the weights are the largest short plates of the mechanical type creep loading experimental equipment; the electronic type is a newly developed product, is mainly based on a servo motor or a servo hydraulic press, and realizes the purpose of long-term constant stress by applying an electronic control technology. Due to the advantages of the electronic creep load testing apparatus and the current sufficient power supply, the mechanical creep load testing apparatus is gradually eliminated, but the advantages of low energy consumption, low noise, continuous stability, etc. of the mechanical apparatus are the reasons for being used by individual mechanisms nowadays.
Although the electronic creep loading experimental equipment has the advantages of intelligent control, no impact, high test precision, small error interference and the like, no matter the equipment is a servo motor or a servo hydraulic machine, the fact that high energy consumption is unavoidable, particularly in the creep loading experiment, the loading period is particularly long, and in an experimental period of many months, the plastic deformation of a material caused by creep occurs at any moment, so that the servo motor or the servo hydraulic machine is required to continuously keep a starting working state, and the stress output is timely adjusted according to the plastic deformation. On the other hand, although the electronic creep loading experiment equipment can lock the servo motor or the servo hydraulic machine in a power-off state, after locking, the experiment attribute is changed from a creep process to a relaxation process, so that errors in a test result are caused.
Therefore, how to design an experimental device which has the advantages of high test precision, no impact, intelligent control and the like of the electronic device and has the characteristics of energy conservation, low noise, continuous stability and the like of the mechanical device is a technical problem to be solved urgently in the field of creep loading experiments.
Disclosure of Invention
The invention aims to provide a novel creep loading experimental device, which aims to solve the technical problems in the prior art, reduce loading energy consumption, maintain constant loading pressure, improve loading precision and realize non-impact loading.
In order to achieve the purpose, the invention provides the following scheme:
the invention discloses a novel creep loading experiment device which comprises a high-pressure gas source, a gas pressure stabilizer, a pressure gas storage chamber and a pressure chamber which are sequentially communicated, wherein the gas pressure stabilizer is communicated with external air through an exhaust pipe, a piston is arranged in the pressure chamber in a sliding manner, a loading head is arranged at the lower end of the piston, a through hole for the loading head to extend out is formed in the bottom of the pressure chamber, a base is arranged below the pressure chamber, the pressure chamber is fixedly connected with the base, a cushion block is arranged on the base, and the cushion block is arranged below the loading head.
Preferably, the high-pressure gas source is communicated with the gas stabilizer through a high-pressure gas inlet pipe, and the gas stabilizer is communicated with the pressure gas storage chamber through a rigid pipeline.
Preferably, the top of the pressurized gas storage chamber is in communication with the top of the pressurization chamber via a vent tube.
Preferably, the cushion block is detachably arranged on the base.
Preferably, a space above the piston in the pressurizing chamber contains pressurized fluid, and the pressurized fluid is water or hydraulic oil.
Preferably, a plurality of fixing arms are provided on the base, and the base is connected to the pressurizing chamber through the fixing arms.
Preferably, a plurality of said fixed arms are evenly distributed on said base.
Compared with the prior art, the invention achieves the following technical effects:
compared with mechanical equipment, the gas voltage stabilizer disclosed by the invention maintains constant pressure, is intelligently controlled and has high precision; the invention realizes loading by inputting pressure gas without impact load;
compared with electronic equipment, the invention does not need to be provided with a servo motor or a servo hydraulic press, and has lower energy consumption and lower noise; when the device works, the continuous and stable work can be realized only by maintaining the energy supply of the normal work of the gas voltage stabilizer.
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 structural diagram of the creep loading experiment apparatus according to the present invention;
description of reference numerals: 1. a pressurized chamber; 101. a pressurized gas; 102. hydraulic oil; 2. a piston; 201. a loading head; 3. testing the test piece; 4. cushion blocks; 5. a base; 6. a breather pipe; 7. a pressurized gas storage chamber; 8. a gas potentiostat; 9. a high-pressure air inlet pipe; 10. an exhaust pipe; 11. a high pressure gas source; 12. and fixing the arm rod.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a novel creep loading experimental device to solve the technical problems in the prior art.
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.
As shown in fig. 1, the present embodiment provides a new creep loading experiment apparatus, which comprises a high-pressure gas source 11, a gas regulator 8, a pressure gas storage chamber 7 and a pressurization chamber 1, which are communicated in sequence. The gas stabilizer 8 is communicated with the outside air through an exhaust pipe 10, and the gas stabilizer 8 can be of a structure commonly used in the prior art.
The piston 2 is arranged in the pressurizing chamber 1 in a sliding manner, the lower end of the piston 2 is provided with a loading head 201, and the bottom of the pressurizing chamber 1 is provided with a through hole for extending the loading head 201.
The pressure chamber 1 is used for containing pressurized liquid and pressure gas 101, and when the sealing performance between the piston 2 and the pressure chamber 1 is good, only the pressure gas 101 can be used for loading; when a high sealing requirement cannot be met between the piston 2 and the pressurizing chamber 1, the pressure gas 101 is likely to leak from the gap between the piston 2 and the pressurizing chamber 1, and at this time, a pressurized fluid, preferably hydraulic oil 102, may be contained in the space above the piston 2 in the pressurizing chamber 1, and the hydraulic oil 102 is selected as the pressurized fluid in this embodiment. Since pressurized liquid is less likely to leak than gas, it can be used for loading.
The base 5 is arranged below the pressurizing chamber 1, the base 5 is provided with a plurality of fixed arm levers 12, the fixed arm levers 12 are uniformly distributed on the base 5, and the base 5 is connected with the pressurizing chamber 1 through the fixed arm levers 12. The base 5 is provided with a cushion block 4, the cushion block 4 is arranged below the loading head 201, and the cushion block 4 is detachably arranged on the base 5.
When a creep loading experiment is performed, the test specimen 3 is disposed between the loading head 201 and the pad block 4. After the pressurized gas is introduced into the pressurizing chamber 1 from the pressurized gas storage chamber 7, two media, i.e., pressurized gas 101 and hydraulic oil 102, are present in the pressurizing chamber 1. The pressure gas 101 pushes the hydraulic oil 102 to move downwards, and further pushes the piston 2 and the loading head 201 fixed on the piston 2 to move downwards, so that the loading head 201 is in contact with the test piece 3 and presses the test piece 3. The gas pressure in the high-pressure gas source 11 is always higher than the gas pressure in the pressurized gas storage chamber 7, so that the high-pressure gas source 11 can continuously supply the high-pressure gas to the pressurized gas storage chamber 7. The compression strength of the cushion block 4 is higher, the flatness is better, uniform loading can be realized by arranging the cushion block 4, the cushion block 4 can be adjusted and replaced to adapt to the test pieces 3 with different heights, and meanwhile, the base 5 can be prevented from being crushed.
Preferably, the high-pressure gas source 11 is communicated with the gas stabilizer 8 through a high-pressure gas inlet pipe 9, the gas stabilizer 8 is communicated with the pressure gas storage chamber 7 through a rigid pipeline, and the gas stabilizer 8 is communicated with the outside air through an exhaust pipe 10. The top of the pressurized gas storage chamber 7 communicates with the top of the pressurization chamber 1 through the vent pipe 6.
Before the experiment, the allowable pressure difference of the gas stabilizer 8 needs to be set in advance. The pressure difference is a difference between the creep test target stress and the pressure value in the pressure gas storage chamber 7, and the gas pressure regulator 8 can automatically acquire the gas pressure in the pressure gas storage chamber 7. When the gas pressure in the pressure gas storage chamber 7 is smaller than the target pressure and the difference value exceeds the allowable pressure difference, the gas pressure stabilizer 8 automatically opens the valve of the high-pressure gas inlet pipe 9, and injects the high-pressure gas in the high-pressure gas source 11 into the pressure gas storage chamber 7 until the difference value is smaller than the allowable pressure difference; when the gas pressure in the pressurized gas storage chamber 7 is higher than the target pressure and the difference exceeds the allowable pressure difference, the gas regulator 8 automatically opens the valve of the exhaust pipe 10 to discharge the high-pressure gas in the pressurized gas storage chamber 7 until the difference is smaller than the allowable pressure difference.
Compared with mechanical creep loading experimental equipment, the gas voltage stabilizer 8 of the embodiment can maintain constant pressure, realize intelligent control and has higher precision; the present embodiment is loaded by the input of pressurized gas 101 without impact load.
Compared with electronic creep loading experimental equipment, the creep loading experimental equipment provided by the embodiment does not need to be provided with a servo motor or a servo hydraulic machine, so that the energy consumption is lower, the noise is lower, and the cost is lower; when the creep loading experimental equipment provided by the embodiment is used, continuous and stable work can be realized only by maintaining the energy supply of the normal work of the gas voltage stabilizer 8, and the energy consumption is lower.
It should be noted that, in the present embodiment, the arrangement manner of the spacer 4, the connection manner between the base 5 and the pressurizing chamber 1, and the communication manner between the high-pressure air source 11, the pressure air storage chamber 7, and the pressurizing chamber 1 are exemplified, and those skilled in the art can select them according to actual needs.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present 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 (5)
1. The novel creep loading experimental equipment is characterized by comprising a high-pressure gas source, a gas pressure stabilizer, a pressure gas storage chamber and a pressure chamber which are sequentially communicated, wherein the gas pressure stabilizer is communicated with external air through an exhaust pipe, a piston is arranged in the pressure chamber in a sliding manner, a loading head is arranged at the lower end of the piston, a through hole for the loading head to extend out is formed in the bottom of the pressure chamber, a base is arranged below the pressure chamber, the pressure chamber is fixedly connected with the base, a cushion block is arranged on the base, and the cushion block is arranged below the loading head;
the high-pressure gas source is communicated with the gas stabilizer through a high-pressure gas inlet pipe, and the gas stabilizer is communicated with the pressure gas storage chamber through a rigid pipeline;
and a space above the piston in the pressurizing chamber is filled with pressurizing liquid, and the pressurizing liquid is water or hydraulic oil.
2. The new creep loading experiment apparatus according to claim 1 wherein the top of the pressurized gas storage chamber is in communication with the top of the pressurized chamber through a vent tube.
3. The new creep loading experiment apparatus of claim 1 wherein the spacer block is removably mounted to the base.
4. The new creep loading experiment apparatus according to claim 1, wherein the base is provided with a plurality of fixed arms, and the base is connected to the pressurizing chamber through the fixed arms.
5. The new creep loading experiment apparatus of claim 4 wherein a plurality of the fixed arms are evenly distributed on the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810155294.3A CN108344629B (en) | 2018-02-23 | 2018-02-23 | Novel creep loading experimental equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810155294.3A CN108344629B (en) | 2018-02-23 | 2018-02-23 | Novel creep loading experimental equipment |
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| Publication Number | Publication Date |
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| CN108344629A CN108344629A (en) | 2018-07-31 |
| CN108344629B true CN108344629B (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810155294.3A Active CN108344629B (en) | 2018-02-23 | 2018-02-23 | Novel creep loading experimental equipment |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896401B (en) * | 2018-08-31 | 2021-04-16 | 南华大学 | High-pressure gas driven rock mechanical testing machine loading head |
| CN109540676B (en) * | 2019-01-05 | 2023-12-12 | 北京交通大学 | Soft rock uniaxial creep gauge adopting servo loading and mechanical voltage stabilization |
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| CN2709972Y (en) * | 2004-07-02 | 2005-07-13 | 方大集团股份有限公司 | Linear loading analogue test device |
| CN101299011A (en) * | 2007-04-30 | 2008-11-05 | 浙江建设职业技术学院 | Air pressure creep deformation tester |
| CN102288490A (en) * | 2011-05-12 | 2011-12-21 | 通标标准技术服务(上海)有限公司 | Static bearing testing device for elevated floor |
| CN205593870U (en) * | 2016-03-24 | 2016-09-21 | 湘潭大学 | Experimental device for test engine piston ring - lubricated friction properties of cylinder liner |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI107646B (en) * | 1997-09-08 | 2001-09-14 | Valtion Teknillinen | Method and apparatus for controlling a pneumatic loading device |
| KR100794293B1 (en) * | 2006-12-18 | 2008-01-11 | 대한폴리텍(주) | Measuring device and method of compression strength of foams according to time passage |
| KR20100114714A (en) * | 2009-04-16 | 2010-10-26 | 대일공업주식회사 | Apparatus for destructive strength test |
| CN101620055B (en) * | 2009-07-29 | 2011-06-01 | 河南理工大学 | Simple creep test device of rocks and test method thereof |
| CN202522487U (en) * | 2012-02-16 | 2012-11-07 | 山东大学 | Creep tester for geosynthetic materials |
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2018
- 2018-02-23 CN CN201810155294.3A patent/CN108344629B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2709972Y (en) * | 2004-07-02 | 2005-07-13 | 方大集团股份有限公司 | Linear loading analogue test device |
| CN101299011A (en) * | 2007-04-30 | 2008-11-05 | 浙江建设职业技术学院 | Air pressure creep deformation tester |
| CN102288490A (en) * | 2011-05-12 | 2011-12-21 | 通标标准技术服务(上海)有限公司 | Static bearing testing device for elevated floor |
| CN205593870U (en) * | 2016-03-24 | 2016-09-21 | 湘潭大学 | Experimental device for test engine piston ring - lubricated friction properties of cylinder liner |
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| CN108344629A (en) | 2018-07-31 |
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