Online detection method and device for high-temperature compression stress relaxation of elastomer

A technology of stress relaxation and detection method, which is applied in the direction of measuring device, using stable tension/pressure to test material strength, fluid tightness test, etc., can solve the problem of speeding up the progress of testing and evaluating the sealing performance and environmental resistance performance of elastomer materials , It takes months or even years to obtain, and the time change of compressive stress cannot be automatically recorded, so as to achieve the effects of strong designability, saving manpower and material resources, and speeding up the evaluation progress

Pending Publication Date: 2022-03-11
SHANDONG NON METALLIC MATERIAL RES INST
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Problems solved by technology

The existing compressive stress relaxation testing device can only perform performance testing at normal temperature. The utility model patent CN 202229986U discloses a rubber compressive stress relaxation instrument, which includes a base, a fixture, an electrical signal system, a movable plate, sensors and data processing and Display device, which can only detect compressive stress under normal temperature conditions, it will take months or even years to obtain sufficient data support, and at the same time, it cannot automatically record the change of compressive stress over time in real time through this device
High-temperature stress relaxation detection can greatly speed up the progress of testing and evaluating the sealing performance and environmental resistance performance of elastomer materials. At present, due to the lack of high-temperature compressive stress relaxation equipment, it is impossible to conduct high-temperature compressive stress relaxation online detection for elastomer sealing materials, so that the new elastomer The progress of material R&D and verification is seriously lagging behind

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  • Online detection method and device for high-temperature compression stress relaxation of elastomer

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Embodiment 1

[0020] The high-temperature compressive stress relaxation online detection device for elastomers in this embodiment includes a sample table 1, a stress loading system, a heating system, a control system 7, a data processing system 8, a recording and display system 9, a sensor 11 and a base 12, and the structural design is as follows: figure 1 shown.

[0021] The sample table 1 is made of stainless steel and is a round table with a diameter of 100 mm and a height of 50 mm.

[0022] The stress loading system includes an indenter 3 , an indenter support 4 , an indenter support 5 and an indenter displacement power system 6 . The indenter 3 is made of stainless steel and includes two coaxial cylinders, the lower cylinder has a diameter of 100mm and a height of 10mm, and the upper cylinder has a diameter of 20mm and a height of 500mm. Pressure head support 4 is two columns with ball screws. The indenter support 5 is a cylindrical structure, and a radial through hole is opened at i...

Embodiment 2

[0031] The difference from Example 1 is:

[0032] Sample stage 1, space aluminum material.

[0033] The indenter 3 of the stress loading system is made of electromagnet and space aluminum, wherein the lower cylinder is space aluminum with a diameter of 50 mm and a height of 5 mm, and the upper cylinder is an electromagnet with a diameter of 50 mm and a height of 50 mm. The pressure head support 4 and the pressure head support 5 are made of space aluminum. The indenter 3, the indenter support 4 and the indenter support 5 are integrally structured. The indenter displacement power system 6 is a magnetic force loading device, which controls the magnitude of the magnetic force through the magnitude of the current, and then regulates the repulsive magnetic force received by the indenter 3, thereby controlling the displacement of the indenter 3 and making the elastic body sample 2 in a preset strain condition.

[0034] The sensor 11 is a galvanic pressure temperature sensor.

[0035...

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Abstract

The invention discloses an online detection method and device for high-temperature compression stress relaxation of an elastomer, and belongs to the technical field of intelligent detection devices. According to the online detection method for the high-temperature compression stress relaxation of the elastomer, full-automatic real-time monitoring of the compression stress relaxation of an elastomer material under different high-temperature conditions can be realized, and the detection which needs to be completed within several months or even several years before can be completed within dozens of days or even several days; the device is simple in structure, high in designability, wide in application range and high in automation degree, a large amount of manpower and material resources can be saved during testing, the material sealing performance detection and evaluation progress is accelerated, and the quality reliability of the sealing material and the service safety of equipment are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of intelligent monitoring and detection devices, and in particular relates to an online detection method and a device for elastic body high-temperature compression stress relaxation. Background technique [0002] Elastomer sealing materials and products, as key materials in the fields of aerospace, weapons and ammunition, and transportation, ensure the normal operation of each component of the equipment system, and also play an important role in ensuring the reliability of the equipment and realizing the performance indicators. Sealing products will be contacted or immersed in various media during use, and a good seal will be achieved by the contact force with the components. During the service process, in addition to conventional heat, oxygen and other factors, it is also subjected to various forms of mechanical stress and the combined effects of various media, which will age the material, deteriorate its e...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01N3/18G01M3/00
CPCG01N3/18G01M3/00
Inventor王登霞孙岩段剑谢可勇庞明磊李晖王新波
OwnerSHANDONG NON METALLIC MATERIAL RES INST